2 * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $
4 * Device driver for Microgate SyncLink Multiport
5 * high speed multiprotocol serial adapter.
7 * written by Paul Fulghum for Microgate Corporation
10 * Microgate and SyncLink are trademarks of Microgate Corporation
12 * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
13 * This code is released under the GNU General Public License (GPL)
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
25 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
30 # define BREAKPOINT() asm(" int $3");
32 # define BREAKPOINT() { }
35 #define MAX_DEVICES 12
37 #include <linux/module.h>
38 #include <linux/errno.h>
39 #include <linux/signal.h>
40 #include <linux/sched.h>
41 #include <linux/timer.h>
42 #include <linux/interrupt.h>
43 #include <linux/pci.h>
44 #include <linux/tty.h>
45 #include <linux/tty_flip.h>
46 #include <linux/serial.h>
47 #include <linux/major.h>
48 #include <linux/string.h>
49 #include <linux/fcntl.h>
50 #include <linux/ptrace.h>
51 #include <linux/ioport.h>
53 #include <linux/seq_file.h>
54 #include <linux/slab.h>
55 #include <linux/netdevice.h>
56 #include <linux/vmalloc.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/ioctl.h>
64 #include <linux/bitops.h>
65 #include <asm/types.h>
66 #include <linux/termios.h>
67 #include <linux/workqueue.h>
68 #include <linux/hdlc.h>
69 #include <linux/synclink.h>
71 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE))
72 #define SYNCLINK_GENERIC_HDLC 1
74 #define SYNCLINK_GENERIC_HDLC 0
77 #define GET_USER(error,value,addr) error = get_user(value,addr)
78 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
79 #define PUT_USER(error,value,addr) error = put_user(value,addr)
80 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
82 #include <asm/uaccess.h>
84 static MGSL_PARAMS default_params
= {
85 MGSL_MODE_HDLC
, /* unsigned long mode */
86 0, /* unsigned char loopback; */
87 HDLC_FLAG_UNDERRUN_ABORT15
, /* unsigned short flags; */
88 HDLC_ENCODING_NRZI_SPACE
, /* unsigned char encoding; */
89 0, /* unsigned long clock_speed; */
90 0xff, /* unsigned char addr_filter; */
91 HDLC_CRC_16_CCITT
, /* unsigned short crc_type; */
92 HDLC_PREAMBLE_LENGTH_8BITS
, /* unsigned char preamble_length; */
93 HDLC_PREAMBLE_PATTERN_NONE
, /* unsigned char preamble; */
94 9600, /* unsigned long data_rate; */
95 8, /* unsigned char data_bits; */
96 1, /* unsigned char stop_bits; */
97 ASYNC_PARITY_NONE
/* unsigned char parity; */
100 /* size in bytes of DMA data buffers */
101 #define SCABUFSIZE 1024
102 #define SCA_MEM_SIZE 0x40000
103 #define SCA_BASE_SIZE 512
104 #define SCA_REG_SIZE 16
105 #define SCA_MAX_PORTS 4
106 #define SCAMAXDESC 128
108 #define BUFFERLISTSIZE 4096
110 /* SCA-I style DMA buffer descriptor */
111 typedef struct _SCADESC
113 u16 next
; /* lower l6 bits of next descriptor addr */
114 u16 buf_ptr
; /* lower 16 bits of buffer addr */
115 u8 buf_base
; /* upper 8 bits of buffer addr */
117 u16 length
; /* length of buffer */
118 u8 status
; /* status of buffer */
120 } SCADESC
, *PSCADESC
;
122 typedef struct _SCADESC_EX
124 /* device driver bookkeeping section */
125 char *virt_addr
; /* virtual address of data buffer */
126 u16 phys_entry
; /* lower 16-bits of physical address of this descriptor */
127 } SCADESC_EX
, *PSCADESC_EX
;
129 /* The queue of BH actions to be performed */
132 #define BH_TRANSMIT 2
135 #define IO_PIN_SHUTDOWN_LIMIT 100
137 struct _input_signal_events
{
149 * Device instance data structure
151 typedef struct _synclinkmp_info
{
152 void *if_ptr
; /* General purpose pointer (used by SPPP) */
154 struct tty_port port
;
156 unsigned short close_delay
;
157 unsigned short closing_wait
; /* time to wait before closing */
159 struct mgsl_icount icount
;
162 int x_char
; /* xon/xoff character */
163 u16 read_status_mask1
; /* break detection (SR1 indications) */
164 u16 read_status_mask2
; /* parity/framing/overun (SR2 indications) */
165 unsigned char ignore_status_mask1
; /* break detection (SR1 indications) */
166 unsigned char ignore_status_mask2
; /* parity/framing/overun (SR2 indications) */
167 unsigned char *tx_buf
;
172 wait_queue_head_t status_event_wait_q
;
173 wait_queue_head_t event_wait_q
;
174 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
175 struct _synclinkmp_info
*next_device
; /* device list link */
176 struct timer_list status_timer
; /* input signal status check timer */
178 spinlock_t lock
; /* spinlock for synchronizing with ISR */
179 struct work_struct task
; /* task structure for scheduling bh */
181 u32 max_frame_size
; /* as set by device config */
185 bool bh_running
; /* Protection from multiple */
189 int dcd_chkcount
; /* check counts to prevent */
190 int cts_chkcount
; /* too many IRQs if a signal */
191 int dsr_chkcount
; /* is floating */
194 char *buffer_list
; /* virtual address of Rx & Tx buffer lists */
195 unsigned long buffer_list_phys
;
197 unsigned int rx_buf_count
; /* count of total allocated Rx buffers */
198 SCADESC
*rx_buf_list
; /* list of receive buffer entries */
199 SCADESC_EX rx_buf_list_ex
[SCAMAXDESC
]; /* list of receive buffer entries */
200 unsigned int current_rx_buf
;
202 unsigned int tx_buf_count
; /* count of total allocated Tx buffers */
203 SCADESC
*tx_buf_list
; /* list of transmit buffer entries */
204 SCADESC_EX tx_buf_list_ex
[SCAMAXDESC
]; /* list of transmit buffer entries */
205 unsigned int last_tx_buf
;
207 unsigned char *tmp_rx_buf
;
208 unsigned int tmp_rx_buf_count
;
217 unsigned char ie0_value
;
218 unsigned char ie1_value
;
219 unsigned char ie2_value
;
220 unsigned char ctrlreg_value
;
221 unsigned char old_signals
;
223 char device_name
[25]; /* device instance name */
229 struct _synclinkmp_info
*port_array
[SCA_MAX_PORTS
];
231 unsigned int bus_type
; /* expansion bus type (ISA,EISA,PCI) */
233 unsigned int irq_level
; /* interrupt level */
234 unsigned long irq_flags
;
235 bool irq_requested
; /* true if IRQ requested */
237 MGSL_PARAMS params
; /* communications parameters */
239 unsigned char serial_signals
; /* current serial signal states */
241 bool irq_occurred
; /* for diagnostics use */
242 unsigned int init_error
; /* Initialization startup error */
245 unsigned char* memory_base
; /* shared memory address (PCI only) */
246 u32 phys_memory_base
;
247 int shared_mem_requested
;
249 unsigned char* sca_base
; /* HD64570 SCA Memory address */
252 bool sca_base_requested
;
254 unsigned char* lcr_base
; /* local config registers (PCI only) */
257 int lcr_mem_requested
;
259 unsigned char* statctrl_base
; /* status/control register memory */
260 u32 phys_statctrl_base
;
262 bool sca_statctrl_requested
;
266 bool drop_rts_on_tx_done
;
268 struct _input_signal_events input_signal_events
;
270 /* SPPP/Cisco HDLC device parts */
274 #if SYNCLINK_GENERIC_HDLC
275 struct net_device
*netdev
;
280 #define MGSL_MAGIC 0x5401
283 * define serial signal status change macros
285 #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */
286 #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */
287 #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */
288 #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */
290 /* Common Register macros */
309 /* MSCI Register macros */
339 /* Timer Register Macros */
349 /* DMA Controller Register macros */
380 /* combine with timer or DMA register address */
388 /* SCA Command Codes */
391 #define TXENABLE 0x02
392 #define TXDISABLE 0x03
393 #define TXCRCINIT 0x04
394 #define TXCRCEXCL 0x05
398 #define TXBUFCLR 0x09
400 #define RXENABLE 0x12
401 #define RXDISABLE 0x13
402 #define RXCRCINIT 0x14
403 #define RXREJECT 0x15
404 #define SEARCHMP 0x16
405 #define RXCRCEXCL 0x17
406 #define RXCRCCALC 0x18
410 /* DMA command codes */
412 #define FEICLEAR 0x02
446 * Global linked list of SyncLink devices
448 static SLMP_INFO
*synclinkmp_device_list
= NULL
;
449 static int synclinkmp_adapter_count
= -1;
450 static int synclinkmp_device_count
= 0;
453 * Set this param to non-zero to load eax with the
454 * .text section address and breakpoint on module load.
455 * This is useful for use with gdb and add-symbol-file command.
457 static bool break_on_load
= 0;
460 * Driver major number, defaults to zero to get auto
461 * assigned major number. May be forced as module parameter.
463 static int ttymajor
= 0;
466 * Array of user specified options for ISA adapters.
468 static int debug_level
= 0;
469 static int maxframe
[MAX_DEVICES
] = {0,};
471 module_param(break_on_load
, bool, 0);
472 module_param(ttymajor
, int, 0);
473 module_param(debug_level
, int, 0);
474 module_param_array(maxframe
, int, NULL
, 0);
476 static char *driver_name
= "SyncLink MultiPort driver";
477 static char *driver_version
= "$Revision: 4.38 $";
479 static int synclinkmp_init_one(struct pci_dev
*dev
,const struct pci_device_id
*ent
);
480 static void synclinkmp_remove_one(struct pci_dev
*dev
);
482 static struct pci_device_id synclinkmp_pci_tbl
[] = {
483 { PCI_VENDOR_ID_MICROGATE
, PCI_DEVICE_ID_MICROGATE_SCA
, PCI_ANY_ID
, PCI_ANY_ID
, },
484 { 0, }, /* terminate list */
486 MODULE_DEVICE_TABLE(pci
, synclinkmp_pci_tbl
);
488 MODULE_LICENSE("GPL");
490 static struct pci_driver synclinkmp_pci_driver
= {
491 .name
= "synclinkmp",
492 .id_table
= synclinkmp_pci_tbl
,
493 .probe
= synclinkmp_init_one
,
494 .remove
= synclinkmp_remove_one
,
498 static struct tty_driver
*serial_driver
;
500 /* number of characters left in xmit buffer before we ask for more */
501 #define WAKEUP_CHARS 256
506 static int open(struct tty_struct
*tty
, struct file
* filp
);
507 static void close(struct tty_struct
*tty
, struct file
* filp
);
508 static void hangup(struct tty_struct
*tty
);
509 static void set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
);
511 static int write(struct tty_struct
*tty
, const unsigned char *buf
, int count
);
512 static int put_char(struct tty_struct
*tty
, unsigned char ch
);
513 static void send_xchar(struct tty_struct
*tty
, char ch
);
514 static void wait_until_sent(struct tty_struct
*tty
, int timeout
);
515 static int write_room(struct tty_struct
*tty
);
516 static void flush_chars(struct tty_struct
*tty
);
517 static void flush_buffer(struct tty_struct
*tty
);
518 static void tx_hold(struct tty_struct
*tty
);
519 static void tx_release(struct tty_struct
*tty
);
521 static int ioctl(struct tty_struct
*tty
, unsigned int cmd
, unsigned long arg
);
522 static int chars_in_buffer(struct tty_struct
*tty
);
523 static void throttle(struct tty_struct
* tty
);
524 static void unthrottle(struct tty_struct
* tty
);
525 static int set_break(struct tty_struct
*tty
, int break_state
);
527 #if SYNCLINK_GENERIC_HDLC
528 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
529 static void hdlcdev_tx_done(SLMP_INFO
*info
);
530 static void hdlcdev_rx(SLMP_INFO
*info
, char *buf
, int size
);
531 static int hdlcdev_init(SLMP_INFO
*info
);
532 static void hdlcdev_exit(SLMP_INFO
*info
);
537 static int get_stats(SLMP_INFO
*info
, struct mgsl_icount __user
*user_icount
);
538 static int get_params(SLMP_INFO
*info
, MGSL_PARAMS __user
*params
);
539 static int set_params(SLMP_INFO
*info
, MGSL_PARAMS __user
*params
);
540 static int get_txidle(SLMP_INFO
*info
, int __user
*idle_mode
);
541 static int set_txidle(SLMP_INFO
*info
, int idle_mode
);
542 static int tx_enable(SLMP_INFO
*info
, int enable
);
543 static int tx_abort(SLMP_INFO
*info
);
544 static int rx_enable(SLMP_INFO
*info
, int enable
);
545 static int modem_input_wait(SLMP_INFO
*info
,int arg
);
546 static int wait_mgsl_event(SLMP_INFO
*info
, int __user
*mask_ptr
);
547 static int tiocmget(struct tty_struct
*tty
);
548 static int tiocmset(struct tty_struct
*tty
,
549 unsigned int set
, unsigned int clear
);
550 static int set_break(struct tty_struct
*tty
, int break_state
);
552 static void add_device(SLMP_INFO
*info
);
553 static void device_init(int adapter_num
, struct pci_dev
*pdev
);
554 static int claim_resources(SLMP_INFO
*info
);
555 static void release_resources(SLMP_INFO
*info
);
557 static int startup(SLMP_INFO
*info
);
558 static int block_til_ready(struct tty_struct
*tty
, struct file
* filp
,SLMP_INFO
*info
);
559 static int carrier_raised(struct tty_port
*port
);
560 static void shutdown(SLMP_INFO
*info
);
561 static void program_hw(SLMP_INFO
*info
);
562 static void change_params(SLMP_INFO
*info
);
564 static bool init_adapter(SLMP_INFO
*info
);
565 static bool register_test(SLMP_INFO
*info
);
566 static bool irq_test(SLMP_INFO
*info
);
567 static bool loopback_test(SLMP_INFO
*info
);
568 static int adapter_test(SLMP_INFO
*info
);
569 static bool memory_test(SLMP_INFO
*info
);
571 static void reset_adapter(SLMP_INFO
*info
);
572 static void reset_port(SLMP_INFO
*info
);
573 static void async_mode(SLMP_INFO
*info
);
574 static void hdlc_mode(SLMP_INFO
*info
);
576 static void rx_stop(SLMP_INFO
*info
);
577 static void rx_start(SLMP_INFO
*info
);
578 static void rx_reset_buffers(SLMP_INFO
*info
);
579 static void rx_free_frame_buffers(SLMP_INFO
*info
, unsigned int first
, unsigned int last
);
580 static bool rx_get_frame(SLMP_INFO
*info
);
582 static void tx_start(SLMP_INFO
*info
);
583 static void tx_stop(SLMP_INFO
*info
);
584 static void tx_load_fifo(SLMP_INFO
*info
);
585 static void tx_set_idle(SLMP_INFO
*info
);
586 static void tx_load_dma_buffer(SLMP_INFO
*info
, const char *buf
, unsigned int count
);
588 static void get_signals(SLMP_INFO
*info
);
589 static void set_signals(SLMP_INFO
*info
);
590 static void enable_loopback(SLMP_INFO
*info
, int enable
);
591 static void set_rate(SLMP_INFO
*info
, u32 data_rate
);
593 static int bh_action(SLMP_INFO
*info
);
594 static void bh_handler(struct work_struct
*work
);
595 static void bh_receive(SLMP_INFO
*info
);
596 static void bh_transmit(SLMP_INFO
*info
);
597 static void bh_status(SLMP_INFO
*info
);
598 static void isr_timer(SLMP_INFO
*info
);
599 static void isr_rxint(SLMP_INFO
*info
);
600 static void isr_rxrdy(SLMP_INFO
*info
);
601 static void isr_txint(SLMP_INFO
*info
);
602 static void isr_txrdy(SLMP_INFO
*info
);
603 static void isr_rxdmaok(SLMP_INFO
*info
);
604 static void isr_rxdmaerror(SLMP_INFO
*info
);
605 static void isr_txdmaok(SLMP_INFO
*info
);
606 static void isr_txdmaerror(SLMP_INFO
*info
);
607 static void isr_io_pin(SLMP_INFO
*info
, u16 status
);
609 static int alloc_dma_bufs(SLMP_INFO
*info
);
610 static void free_dma_bufs(SLMP_INFO
*info
);
611 static int alloc_buf_list(SLMP_INFO
*info
);
612 static int alloc_frame_bufs(SLMP_INFO
*info
, SCADESC
*list
, SCADESC_EX
*list_ex
,int count
);
613 static int alloc_tmp_rx_buf(SLMP_INFO
*info
);
614 static void free_tmp_rx_buf(SLMP_INFO
*info
);
616 static void load_pci_memory(SLMP_INFO
*info
, char* dest
, const char* src
, unsigned short count
);
617 static void trace_block(SLMP_INFO
*info
, const char* data
, int count
, int xmit
);
618 static void tx_timeout(unsigned long context
);
619 static void status_timeout(unsigned long context
);
621 static unsigned char read_reg(SLMP_INFO
*info
, unsigned char addr
);
622 static void write_reg(SLMP_INFO
*info
, unsigned char addr
, unsigned char val
);
623 static u16
read_reg16(SLMP_INFO
*info
, unsigned char addr
);
624 static void write_reg16(SLMP_INFO
*info
, unsigned char addr
, u16 val
);
625 static unsigned char read_status_reg(SLMP_INFO
* info
);
626 static void write_control_reg(SLMP_INFO
* info
);
629 static unsigned char rx_active_fifo_level
= 16; // rx request FIFO activation level in bytes
630 static unsigned char tx_active_fifo_level
= 16; // tx request FIFO activation level in bytes
631 static unsigned char tx_negate_fifo_level
= 32; // tx request FIFO negation level in bytes
633 static u32 misc_ctrl_value
= 0x007e4040;
634 static u32 lcr1_brdr_value
= 0x00800028;
636 static u32 read_ahead_count
= 8;
638 /* DPCR, DMA Priority Control
640 * 07..05 Not used, must be 0
641 * 04 BRC, bus release condition: 0=all transfers complete
642 * 1=release after 1 xfer on all channels
643 * 03 CCC, channel change condition: 0=every cycle
644 * 1=after each channel completes all xfers
645 * 02..00 PR<2..0>, priority 100=round robin
649 static unsigned char dma_priority
= 0x04;
651 // Number of bytes that can be written to shared RAM
652 // in a single write operation
653 static u32 sca_pci_load_interval
= 64;
656 * 1st function defined in .text section. Calling this function in
657 * init_module() followed by a breakpoint allows a remote debugger
658 * (gdb) to get the .text address for the add-symbol-file command.
659 * This allows remote debugging of dynamically loadable modules.
661 static void* synclinkmp_get_text_ptr(void);
662 static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr
;}
664 static inline int sanity_check(SLMP_INFO
*info
,
665 char *name
, const char *routine
)
668 static const char *badmagic
=
669 "Warning: bad magic number for synclinkmp_struct (%s) in %s\n";
670 static const char *badinfo
=
671 "Warning: null synclinkmp_struct for (%s) in %s\n";
674 printk(badinfo
, name
, routine
);
677 if (info
->magic
!= MGSL_MAGIC
) {
678 printk(badmagic
, name
, routine
);
689 * line discipline callback wrappers
691 * The wrappers maintain line discipline references
692 * while calling into the line discipline.
694 * ldisc_receive_buf - pass receive data to line discipline
697 static void ldisc_receive_buf(struct tty_struct
*tty
,
698 const __u8
*data
, char *flags
, int count
)
700 struct tty_ldisc
*ld
;
703 ld
= tty_ldisc_ref(tty
);
705 if (ld
->ops
->receive_buf
)
706 ld
->ops
->receive_buf(tty
, data
, flags
, count
);
713 static int install(struct tty_driver
*driver
, struct tty_struct
*tty
)
716 int line
= tty
->index
;
718 if (line
>= synclinkmp_device_count
) {
719 printk("%s(%d): open with invalid line #%d.\n",
720 __FILE__
,__LINE__
,line
);
724 info
= synclinkmp_device_list
;
725 while (info
&& info
->line
!= line
)
726 info
= info
->next_device
;
727 if (sanity_check(info
, tty
->name
, "open"))
729 if (info
->init_error
) {
730 printk("%s(%d):%s device is not allocated, init error=%d\n",
731 __FILE__
, __LINE__
, info
->device_name
,
736 tty
->driver_data
= info
;
738 return tty_port_install(&info
->port
, driver
, tty
);
741 /* Called when a port is opened. Init and enable port.
743 static int open(struct tty_struct
*tty
, struct file
*filp
)
745 SLMP_INFO
*info
= tty
->driver_data
;
749 info
->port
.tty
= tty
;
751 if (debug_level
>= DEBUG_LEVEL_INFO
)
752 printk("%s(%d):%s open(), old ref count = %d\n",
753 __FILE__
,__LINE__
,tty
->driver
->name
, info
->port
.count
);
755 /* If port is closing, signal caller to try again */
756 if (tty_hung_up_p(filp
) || info
->port
.flags
& ASYNC_CLOSING
){
757 wait_event_interruptible_tty(tty
, info
->port
.close_wait
,
758 !(info
->port
.flags
& ASYNC_CLOSING
));
759 retval
= ((info
->port
.flags
& ASYNC_HUP_NOTIFY
) ?
760 -EAGAIN
: -ERESTARTSYS
);
764 info
->port
.low_latency
= (info
->port
.flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
766 spin_lock_irqsave(&info
->netlock
, flags
);
767 if (info
->netcount
) {
769 spin_unlock_irqrestore(&info
->netlock
, flags
);
773 spin_unlock_irqrestore(&info
->netlock
, flags
);
775 if (info
->port
.count
== 1) {
776 /* 1st open on this device, init hardware */
777 retval
= startup(info
);
782 retval
= block_til_ready(tty
, filp
, info
);
784 if (debug_level
>= DEBUG_LEVEL_INFO
)
785 printk("%s(%d):%s block_til_ready() returned %d\n",
786 __FILE__
,__LINE__
, info
->device_name
, retval
);
790 if (debug_level
>= DEBUG_LEVEL_INFO
)
791 printk("%s(%d):%s open() success\n",
792 __FILE__
,__LINE__
, info
->device_name
);
798 info
->port
.tty
= NULL
; /* tty layer will release tty struct */
806 /* Called when port is closed. Wait for remaining data to be
807 * sent. Disable port and free resources.
809 static void close(struct tty_struct
*tty
, struct file
*filp
)
811 SLMP_INFO
* info
= tty
->driver_data
;
813 if (sanity_check(info
, tty
->name
, "close"))
816 if (debug_level
>= DEBUG_LEVEL_INFO
)
817 printk("%s(%d):%s close() entry, count=%d\n",
818 __FILE__
,__LINE__
, info
->device_name
, info
->port
.count
);
820 if (tty_port_close_start(&info
->port
, tty
, filp
) == 0)
823 mutex_lock(&info
->port
.mutex
);
824 if (info
->port
.flags
& ASYNC_INITIALIZED
)
825 wait_until_sent(tty
, info
->timeout
);
828 tty_ldisc_flush(tty
);
830 mutex_unlock(&info
->port
.mutex
);
832 tty_port_close_end(&info
->port
, tty
);
833 info
->port
.tty
= NULL
;
835 if (debug_level
>= DEBUG_LEVEL_INFO
)
836 printk("%s(%d):%s close() exit, count=%d\n", __FILE__
,__LINE__
,
837 tty
->driver
->name
, info
->port
.count
);
840 /* Called by tty_hangup() when a hangup is signaled.
841 * This is the same as closing all open descriptors for the port.
843 static void hangup(struct tty_struct
*tty
)
845 SLMP_INFO
*info
= tty
->driver_data
;
848 if (debug_level
>= DEBUG_LEVEL_INFO
)
849 printk("%s(%d):%s hangup()\n",
850 __FILE__
,__LINE__
, info
->device_name
);
852 if (sanity_check(info
, tty
->name
, "hangup"))
855 mutex_lock(&info
->port
.mutex
);
859 spin_lock_irqsave(&info
->port
.lock
, flags
);
860 info
->port
.count
= 0;
861 info
->port
.flags
&= ~ASYNC_NORMAL_ACTIVE
;
862 info
->port
.tty
= NULL
;
863 spin_unlock_irqrestore(&info
->port
.lock
, flags
);
864 mutex_unlock(&info
->port
.mutex
);
866 wake_up_interruptible(&info
->port
.open_wait
);
869 /* Set new termios settings
871 static void set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
873 SLMP_INFO
*info
= tty
->driver_data
;
876 if (debug_level
>= DEBUG_LEVEL_INFO
)
877 printk("%s(%d):%s set_termios()\n", __FILE__
,__LINE__
,
882 /* Handle transition to B0 status */
883 if (old_termios
->c_cflag
& CBAUD
&&
884 !(tty
->termios
.c_cflag
& CBAUD
)) {
885 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
886 spin_lock_irqsave(&info
->lock
,flags
);
888 spin_unlock_irqrestore(&info
->lock
,flags
);
891 /* Handle transition away from B0 status */
892 if (!(old_termios
->c_cflag
& CBAUD
) &&
893 tty
->termios
.c_cflag
& CBAUD
) {
894 info
->serial_signals
|= SerialSignal_DTR
;
895 if (!(tty
->termios
.c_cflag
& CRTSCTS
) ||
896 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
897 info
->serial_signals
|= SerialSignal_RTS
;
899 spin_lock_irqsave(&info
->lock
,flags
);
901 spin_unlock_irqrestore(&info
->lock
,flags
);
904 /* Handle turning off CRTSCTS */
905 if (old_termios
->c_cflag
& CRTSCTS
&&
906 !(tty
->termios
.c_cflag
& CRTSCTS
)) {
912 /* Send a block of data
916 * tty pointer to tty information structure
917 * buf pointer to buffer containing send data
918 * count size of send data in bytes
920 * Return Value: number of characters written
922 static int write(struct tty_struct
*tty
,
923 const unsigned char *buf
, int count
)
926 SLMP_INFO
*info
= tty
->driver_data
;
929 if (debug_level
>= DEBUG_LEVEL_INFO
)
930 printk("%s(%d):%s write() count=%d\n",
931 __FILE__
,__LINE__
,info
->device_name
,count
);
933 if (sanity_check(info
, tty
->name
, "write"))
939 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
940 if (count
> info
->max_frame_size
) {
946 if (info
->tx_count
) {
947 /* send accumulated data from send_char() calls */
948 /* as frame and wait before accepting more data. */
949 tx_load_dma_buffer(info
, info
->tx_buf
, info
->tx_count
);
952 ret
= info
->tx_count
= count
;
953 tx_load_dma_buffer(info
, buf
, count
);
958 c
= min_t(int, count
,
959 min(info
->max_frame_size
- info
->tx_count
- 1,
960 info
->max_frame_size
- info
->tx_put
));
964 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
966 spin_lock_irqsave(&info
->lock
,flags
);
968 if (info
->tx_put
>= info
->max_frame_size
)
969 info
->tx_put
-= info
->max_frame_size
;
971 spin_unlock_irqrestore(&info
->lock
,flags
);
978 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
980 ret
= info
->tx_count
= 0;
983 tx_load_dma_buffer(info
, info
->tx_buf
, info
->tx_count
);
986 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
987 spin_lock_irqsave(&info
->lock
,flags
);
988 if (!info
->tx_active
)
990 spin_unlock_irqrestore(&info
->lock
,flags
);
994 if (debug_level
>= DEBUG_LEVEL_INFO
)
995 printk( "%s(%d):%s write() returning=%d\n",
996 __FILE__
,__LINE__
,info
->device_name
,ret
);
1000 /* Add a character to the transmit buffer.
1002 static int put_char(struct tty_struct
*tty
, unsigned char ch
)
1004 SLMP_INFO
*info
= tty
->driver_data
;
1005 unsigned long flags
;
1008 if ( debug_level
>= DEBUG_LEVEL_INFO
) {
1009 printk( "%s(%d):%s put_char(%d)\n",
1010 __FILE__
,__LINE__
,info
->device_name
,ch
);
1013 if (sanity_check(info
, tty
->name
, "put_char"))
1019 spin_lock_irqsave(&info
->lock
,flags
);
1021 if ( (info
->params
.mode
!= MGSL_MODE_HDLC
) ||
1022 !info
->tx_active
) {
1024 if (info
->tx_count
< info
->max_frame_size
- 1) {
1025 info
->tx_buf
[info
->tx_put
++] = ch
;
1026 if (info
->tx_put
>= info
->max_frame_size
)
1027 info
->tx_put
-= info
->max_frame_size
;
1033 spin_unlock_irqrestore(&info
->lock
,flags
);
1037 /* Send a high-priority XON/XOFF character
1039 static void send_xchar(struct tty_struct
*tty
, char ch
)
1041 SLMP_INFO
*info
= tty
->driver_data
;
1042 unsigned long flags
;
1044 if (debug_level
>= DEBUG_LEVEL_INFO
)
1045 printk("%s(%d):%s send_xchar(%d)\n",
1046 __FILE__
,__LINE__
, info
->device_name
, ch
);
1048 if (sanity_check(info
, tty
->name
, "send_xchar"))
1053 /* Make sure transmit interrupts are on */
1054 spin_lock_irqsave(&info
->lock
,flags
);
1055 if (!info
->tx_enabled
)
1057 spin_unlock_irqrestore(&info
->lock
,flags
);
1061 /* Wait until the transmitter is empty.
1063 static void wait_until_sent(struct tty_struct
*tty
, int timeout
)
1065 SLMP_INFO
* info
= tty
->driver_data
;
1066 unsigned long orig_jiffies
, char_time
;
1071 if (debug_level
>= DEBUG_LEVEL_INFO
)
1072 printk("%s(%d):%s wait_until_sent() entry\n",
1073 __FILE__
,__LINE__
, info
->device_name
);
1075 if (sanity_check(info
, tty
->name
, "wait_until_sent"))
1078 if (!test_bit(ASYNCB_INITIALIZED
, &info
->port
.flags
))
1081 orig_jiffies
= jiffies
;
1083 /* Set check interval to 1/5 of estimated time to
1084 * send a character, and make it at least 1. The check
1085 * interval should also be less than the timeout.
1086 * Note: use tight timings here to satisfy the NIST-PCTS.
1089 if ( info
->params
.data_rate
) {
1090 char_time
= info
->timeout
/(32 * 5);
1097 char_time
= min_t(unsigned long, char_time
, timeout
);
1099 if ( info
->params
.mode
== MGSL_MODE_HDLC
) {
1100 while (info
->tx_active
) {
1101 msleep_interruptible(jiffies_to_msecs(char_time
));
1102 if (signal_pending(current
))
1104 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
1109 * TODO: determine if there is something similar to USC16C32
1110 * TXSTATUS_ALL_SENT status
1112 while ( info
->tx_active
&& info
->tx_enabled
) {
1113 msleep_interruptible(jiffies_to_msecs(char_time
));
1114 if (signal_pending(current
))
1116 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
1122 if (debug_level
>= DEBUG_LEVEL_INFO
)
1123 printk("%s(%d):%s wait_until_sent() exit\n",
1124 __FILE__
,__LINE__
, info
->device_name
);
1127 /* Return the count of free bytes in transmit buffer
1129 static int write_room(struct tty_struct
*tty
)
1131 SLMP_INFO
*info
= tty
->driver_data
;
1134 if (sanity_check(info
, tty
->name
, "write_room"))
1137 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1138 ret
= (info
->tx_active
) ? 0 : HDLC_MAX_FRAME_SIZE
;
1140 ret
= info
->max_frame_size
- info
->tx_count
- 1;
1145 if (debug_level
>= DEBUG_LEVEL_INFO
)
1146 printk("%s(%d):%s write_room()=%d\n",
1147 __FILE__
, __LINE__
, info
->device_name
, ret
);
1152 /* enable transmitter and send remaining buffered characters
1154 static void flush_chars(struct tty_struct
*tty
)
1156 SLMP_INFO
*info
= tty
->driver_data
;
1157 unsigned long flags
;
1159 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1160 printk( "%s(%d):%s flush_chars() entry tx_count=%d\n",
1161 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1163 if (sanity_check(info
, tty
->name
, "flush_chars"))
1166 if (info
->tx_count
<= 0 || tty
->stopped
|| tty
->hw_stopped
||
1170 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1171 printk( "%s(%d):%s flush_chars() entry, starting transmitter\n",
1172 __FILE__
,__LINE__
,info
->device_name
);
1174 spin_lock_irqsave(&info
->lock
,flags
);
1176 if (!info
->tx_active
) {
1177 if ( (info
->params
.mode
== MGSL_MODE_HDLC
) &&
1179 /* operating in synchronous (frame oriented) mode */
1180 /* copy data from circular tx_buf to */
1181 /* transmit DMA buffer. */
1182 tx_load_dma_buffer(info
,
1183 info
->tx_buf
,info
->tx_count
);
1188 spin_unlock_irqrestore(&info
->lock
,flags
);
1191 /* Discard all data in the send buffer
1193 static void flush_buffer(struct tty_struct
*tty
)
1195 SLMP_INFO
*info
= tty
->driver_data
;
1196 unsigned long flags
;
1198 if (debug_level
>= DEBUG_LEVEL_INFO
)
1199 printk("%s(%d):%s flush_buffer() entry\n",
1200 __FILE__
,__LINE__
, info
->device_name
);
1202 if (sanity_check(info
, tty
->name
, "flush_buffer"))
1205 spin_lock_irqsave(&info
->lock
,flags
);
1206 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1207 del_timer(&info
->tx_timer
);
1208 spin_unlock_irqrestore(&info
->lock
,flags
);
1213 /* throttle (stop) transmitter
1215 static void tx_hold(struct tty_struct
*tty
)
1217 SLMP_INFO
*info
= tty
->driver_data
;
1218 unsigned long flags
;
1220 if (sanity_check(info
, tty
->name
, "tx_hold"))
1223 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1224 printk("%s(%d):%s tx_hold()\n",
1225 __FILE__
,__LINE__
,info
->device_name
);
1227 spin_lock_irqsave(&info
->lock
,flags
);
1228 if (info
->tx_enabled
)
1230 spin_unlock_irqrestore(&info
->lock
,flags
);
1233 /* release (start) transmitter
1235 static void tx_release(struct tty_struct
*tty
)
1237 SLMP_INFO
*info
= tty
->driver_data
;
1238 unsigned long flags
;
1240 if (sanity_check(info
, tty
->name
, "tx_release"))
1243 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1244 printk("%s(%d):%s tx_release()\n",
1245 __FILE__
,__LINE__
,info
->device_name
);
1247 spin_lock_irqsave(&info
->lock
,flags
);
1248 if (!info
->tx_enabled
)
1250 spin_unlock_irqrestore(&info
->lock
,flags
);
1253 /* Service an IOCTL request
1257 * tty pointer to tty instance data
1258 * cmd IOCTL command code
1259 * arg command argument/context
1261 * Return Value: 0 if success, otherwise error code
1263 static int ioctl(struct tty_struct
*tty
,
1264 unsigned int cmd
, unsigned long arg
)
1266 SLMP_INFO
*info
= tty
->driver_data
;
1267 void __user
*argp
= (void __user
*)arg
;
1269 if (debug_level
>= DEBUG_LEVEL_INFO
)
1270 printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__
,__LINE__
,
1271 info
->device_name
, cmd
);
1273 if (sanity_check(info
, tty
->name
, "ioctl"))
1276 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
1277 (cmd
!= TIOCMIWAIT
)) {
1278 if (tty
->flags
& (1 << TTY_IO_ERROR
))
1283 case MGSL_IOCGPARAMS
:
1284 return get_params(info
, argp
);
1285 case MGSL_IOCSPARAMS
:
1286 return set_params(info
, argp
);
1287 case MGSL_IOCGTXIDLE
:
1288 return get_txidle(info
, argp
);
1289 case MGSL_IOCSTXIDLE
:
1290 return set_txidle(info
, (int)arg
);
1291 case MGSL_IOCTXENABLE
:
1292 return tx_enable(info
, (int)arg
);
1293 case MGSL_IOCRXENABLE
:
1294 return rx_enable(info
, (int)arg
);
1295 case MGSL_IOCTXABORT
:
1296 return tx_abort(info
);
1297 case MGSL_IOCGSTATS
:
1298 return get_stats(info
, argp
);
1299 case MGSL_IOCWAITEVENT
:
1300 return wait_mgsl_event(info
, argp
);
1301 case MGSL_IOCLOOPTXDONE
:
1302 return 0; // TODO: Not supported, need to document
1303 /* Wait for modem input (DCD,RI,DSR,CTS) change
1304 * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
1307 return modem_input_wait(info
,(int)arg
);
1310 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1311 * Return: write counters to the user passed counter struct
1312 * NB: both 1->0 and 0->1 transitions are counted except for
1313 * RI where only 0->1 is counted.
1316 return -ENOIOCTLCMD
;
1321 static int get_icount(struct tty_struct
*tty
,
1322 struct serial_icounter_struct
*icount
)
1324 SLMP_INFO
*info
= tty
->driver_data
;
1325 struct mgsl_icount cnow
; /* kernel counter temps */
1326 unsigned long flags
;
1328 spin_lock_irqsave(&info
->lock
,flags
);
1329 cnow
= info
->icount
;
1330 spin_unlock_irqrestore(&info
->lock
,flags
);
1332 icount
->cts
= cnow
.cts
;
1333 icount
->dsr
= cnow
.dsr
;
1334 icount
->rng
= cnow
.rng
;
1335 icount
->dcd
= cnow
.dcd
;
1336 icount
->rx
= cnow
.rx
;
1337 icount
->tx
= cnow
.tx
;
1338 icount
->frame
= cnow
.frame
;
1339 icount
->overrun
= cnow
.overrun
;
1340 icount
->parity
= cnow
.parity
;
1341 icount
->brk
= cnow
.brk
;
1342 icount
->buf_overrun
= cnow
.buf_overrun
;
1348 * /proc fs routines....
1351 static inline void line_info(struct seq_file
*m
, SLMP_INFO
*info
)
1354 unsigned long flags
;
1356 seq_printf(m
, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n"
1357 "\tIRQ=%d MaxFrameSize=%u\n",
1359 info
->phys_sca_base
,
1360 info
->phys_memory_base
,
1361 info
->phys_statctrl_base
,
1362 info
->phys_lcr_base
,
1364 info
->max_frame_size
);
1366 /* output current serial signal states */
1367 spin_lock_irqsave(&info
->lock
,flags
);
1369 spin_unlock_irqrestore(&info
->lock
,flags
);
1373 if (info
->serial_signals
& SerialSignal_RTS
)
1374 strcat(stat_buf
, "|RTS");
1375 if (info
->serial_signals
& SerialSignal_CTS
)
1376 strcat(stat_buf
, "|CTS");
1377 if (info
->serial_signals
& SerialSignal_DTR
)
1378 strcat(stat_buf
, "|DTR");
1379 if (info
->serial_signals
& SerialSignal_DSR
)
1380 strcat(stat_buf
, "|DSR");
1381 if (info
->serial_signals
& SerialSignal_DCD
)
1382 strcat(stat_buf
, "|CD");
1383 if (info
->serial_signals
& SerialSignal_RI
)
1384 strcat(stat_buf
, "|RI");
1386 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1387 seq_printf(m
, "\tHDLC txok:%d rxok:%d",
1388 info
->icount
.txok
, info
->icount
.rxok
);
1389 if (info
->icount
.txunder
)
1390 seq_printf(m
, " txunder:%d", info
->icount
.txunder
);
1391 if (info
->icount
.txabort
)
1392 seq_printf(m
, " txabort:%d", info
->icount
.txabort
);
1393 if (info
->icount
.rxshort
)
1394 seq_printf(m
, " rxshort:%d", info
->icount
.rxshort
);
1395 if (info
->icount
.rxlong
)
1396 seq_printf(m
, " rxlong:%d", info
->icount
.rxlong
);
1397 if (info
->icount
.rxover
)
1398 seq_printf(m
, " rxover:%d", info
->icount
.rxover
);
1399 if (info
->icount
.rxcrc
)
1400 seq_printf(m
, " rxlong:%d", info
->icount
.rxcrc
);
1402 seq_printf(m
, "\tASYNC tx:%d rx:%d",
1403 info
->icount
.tx
, info
->icount
.rx
);
1404 if (info
->icount
.frame
)
1405 seq_printf(m
, " fe:%d", info
->icount
.frame
);
1406 if (info
->icount
.parity
)
1407 seq_printf(m
, " pe:%d", info
->icount
.parity
);
1408 if (info
->icount
.brk
)
1409 seq_printf(m
, " brk:%d", info
->icount
.brk
);
1410 if (info
->icount
.overrun
)
1411 seq_printf(m
, " oe:%d", info
->icount
.overrun
);
1414 /* Append serial signal status to end */
1415 seq_printf(m
, " %s\n", stat_buf
+1);
1417 seq_printf(m
, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
1418 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
1422 /* Called to print information about devices
1424 static int synclinkmp_proc_show(struct seq_file
*m
, void *v
)
1428 seq_printf(m
, "synclinkmp driver:%s\n", driver_version
);
1430 info
= synclinkmp_device_list
;
1433 info
= info
->next_device
;
1438 static int synclinkmp_proc_open(struct inode
*inode
, struct file
*file
)
1440 return single_open(file
, synclinkmp_proc_show
, NULL
);
1443 static const struct file_operations synclinkmp_proc_fops
= {
1444 .owner
= THIS_MODULE
,
1445 .open
= synclinkmp_proc_open
,
1447 .llseek
= seq_lseek
,
1448 .release
= single_release
,
1451 /* Return the count of bytes in transmit buffer
1453 static int chars_in_buffer(struct tty_struct
*tty
)
1455 SLMP_INFO
*info
= tty
->driver_data
;
1457 if (sanity_check(info
, tty
->name
, "chars_in_buffer"))
1460 if (debug_level
>= DEBUG_LEVEL_INFO
)
1461 printk("%s(%d):%s chars_in_buffer()=%d\n",
1462 __FILE__
, __LINE__
, info
->device_name
, info
->tx_count
);
1464 return info
->tx_count
;
1467 /* Signal remote device to throttle send data (our receive data)
1469 static void throttle(struct tty_struct
* tty
)
1471 SLMP_INFO
*info
= tty
->driver_data
;
1472 unsigned long flags
;
1474 if (debug_level
>= DEBUG_LEVEL_INFO
)
1475 printk("%s(%d):%s throttle() entry\n",
1476 __FILE__
,__LINE__
, info
->device_name
);
1478 if (sanity_check(info
, tty
->name
, "throttle"))
1482 send_xchar(tty
, STOP_CHAR(tty
));
1484 if (tty
->termios
.c_cflag
& CRTSCTS
) {
1485 spin_lock_irqsave(&info
->lock
,flags
);
1486 info
->serial_signals
&= ~SerialSignal_RTS
;
1488 spin_unlock_irqrestore(&info
->lock
,flags
);
1492 /* Signal remote device to stop throttling send data (our receive data)
1494 static void unthrottle(struct tty_struct
* tty
)
1496 SLMP_INFO
*info
= tty
->driver_data
;
1497 unsigned long flags
;
1499 if (debug_level
>= DEBUG_LEVEL_INFO
)
1500 printk("%s(%d):%s unthrottle() entry\n",
1501 __FILE__
,__LINE__
, info
->device_name
);
1503 if (sanity_check(info
, tty
->name
, "unthrottle"))
1510 send_xchar(tty
, START_CHAR(tty
));
1513 if (tty
->termios
.c_cflag
& CRTSCTS
) {
1514 spin_lock_irqsave(&info
->lock
,flags
);
1515 info
->serial_signals
|= SerialSignal_RTS
;
1517 spin_unlock_irqrestore(&info
->lock
,flags
);
1521 /* set or clear transmit break condition
1522 * break_state -1=set break condition, 0=clear
1524 static int set_break(struct tty_struct
*tty
, int break_state
)
1526 unsigned char RegValue
;
1527 SLMP_INFO
* info
= tty
->driver_data
;
1528 unsigned long flags
;
1530 if (debug_level
>= DEBUG_LEVEL_INFO
)
1531 printk("%s(%d):%s set_break(%d)\n",
1532 __FILE__
,__LINE__
, info
->device_name
, break_state
);
1534 if (sanity_check(info
, tty
->name
, "set_break"))
1537 spin_lock_irqsave(&info
->lock
,flags
);
1538 RegValue
= read_reg(info
, CTL
);
1539 if (break_state
== -1)
1543 write_reg(info
, CTL
, RegValue
);
1544 spin_unlock_irqrestore(&info
->lock
,flags
);
1548 #if SYNCLINK_GENERIC_HDLC
1551 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
1552 * set encoding and frame check sequence (FCS) options
1554 * dev pointer to network device structure
1555 * encoding serial encoding setting
1556 * parity FCS setting
1558 * returns 0 if success, otherwise error code
1560 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
1561 unsigned short parity
)
1563 SLMP_INFO
*info
= dev_to_port(dev
);
1564 unsigned char new_encoding
;
1565 unsigned short new_crctype
;
1567 /* return error if TTY interface open */
1568 if (info
->port
.count
)
1573 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
1574 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
1575 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
1576 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
1577 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
1578 default: return -EINVAL
;
1583 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
1584 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
1585 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
1586 default: return -EINVAL
;
1589 info
->params
.encoding
= new_encoding
;
1590 info
->params
.crc_type
= new_crctype
;
1592 /* if network interface up, reprogram hardware */
1600 * called by generic HDLC layer to send frame
1602 * skb socket buffer containing HDLC frame
1603 * dev pointer to network device structure
1605 static netdev_tx_t
hdlcdev_xmit(struct sk_buff
*skb
,
1606 struct net_device
*dev
)
1608 SLMP_INFO
*info
= dev_to_port(dev
);
1609 unsigned long flags
;
1611 if (debug_level
>= DEBUG_LEVEL_INFO
)
1612 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
1614 /* stop sending until this frame completes */
1615 netif_stop_queue(dev
);
1617 /* copy data to device buffers */
1618 info
->tx_count
= skb
->len
;
1619 tx_load_dma_buffer(info
, skb
->data
, skb
->len
);
1621 /* update network statistics */
1622 dev
->stats
.tx_packets
++;
1623 dev
->stats
.tx_bytes
+= skb
->len
;
1625 /* done with socket buffer, so free it */
1628 /* save start time for transmit timeout detection */
1629 dev
->trans_start
= jiffies
;
1631 /* start hardware transmitter if necessary */
1632 spin_lock_irqsave(&info
->lock
,flags
);
1633 if (!info
->tx_active
)
1635 spin_unlock_irqrestore(&info
->lock
,flags
);
1637 return NETDEV_TX_OK
;
1641 * called by network layer when interface enabled
1642 * claim resources and initialize hardware
1644 * dev pointer to network device structure
1646 * returns 0 if success, otherwise error code
1648 static int hdlcdev_open(struct net_device
*dev
)
1650 SLMP_INFO
*info
= dev_to_port(dev
);
1652 unsigned long flags
;
1654 if (debug_level
>= DEBUG_LEVEL_INFO
)
1655 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
1657 /* generic HDLC layer open processing */
1658 if ((rc
= hdlc_open(dev
)))
1661 /* arbitrate between network and tty opens */
1662 spin_lock_irqsave(&info
->netlock
, flags
);
1663 if (info
->port
.count
!= 0 || info
->netcount
!= 0) {
1664 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
1665 spin_unlock_irqrestore(&info
->netlock
, flags
);
1669 spin_unlock_irqrestore(&info
->netlock
, flags
);
1671 /* claim resources and init adapter */
1672 if ((rc
= startup(info
)) != 0) {
1673 spin_lock_irqsave(&info
->netlock
, flags
);
1675 spin_unlock_irqrestore(&info
->netlock
, flags
);
1679 /* assert RTS and DTR, apply hardware settings */
1680 info
->serial_signals
|= SerialSignal_RTS
| SerialSignal_DTR
;
1683 /* enable network layer transmit */
1684 dev
->trans_start
= jiffies
;
1685 netif_start_queue(dev
);
1687 /* inform generic HDLC layer of current DCD status */
1688 spin_lock_irqsave(&info
->lock
, flags
);
1690 spin_unlock_irqrestore(&info
->lock
, flags
);
1691 if (info
->serial_signals
& SerialSignal_DCD
)
1692 netif_carrier_on(dev
);
1694 netif_carrier_off(dev
);
1699 * called by network layer when interface is disabled
1700 * shutdown hardware and release resources
1702 * dev pointer to network device structure
1704 * returns 0 if success, otherwise error code
1706 static int hdlcdev_close(struct net_device
*dev
)
1708 SLMP_INFO
*info
= dev_to_port(dev
);
1709 unsigned long flags
;
1711 if (debug_level
>= DEBUG_LEVEL_INFO
)
1712 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
1714 netif_stop_queue(dev
);
1716 /* shutdown adapter and release resources */
1721 spin_lock_irqsave(&info
->netlock
, flags
);
1723 spin_unlock_irqrestore(&info
->netlock
, flags
);
1729 * called by network layer to process IOCTL call to network device
1731 * dev pointer to network device structure
1732 * ifr pointer to network interface request structure
1733 * cmd IOCTL command code
1735 * returns 0 if success, otherwise error code
1737 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
1739 const size_t size
= sizeof(sync_serial_settings
);
1740 sync_serial_settings new_line
;
1741 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
1742 SLMP_INFO
*info
= dev_to_port(dev
);
1745 if (debug_level
>= DEBUG_LEVEL_INFO
)
1746 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
1748 /* return error if TTY interface open */
1749 if (info
->port
.count
)
1752 if (cmd
!= SIOCWANDEV
)
1753 return hdlc_ioctl(dev
, ifr
, cmd
);
1755 switch(ifr
->ifr_settings
.type
) {
1756 case IF_GET_IFACE
: /* return current sync_serial_settings */
1758 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
1759 if (ifr
->ifr_settings
.size
< size
) {
1760 ifr
->ifr_settings
.size
= size
; /* data size wanted */
1764 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
1765 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
1766 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
1767 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
1769 memset(&new_line
, 0, sizeof(new_line
));
1771 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
1772 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
1773 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
1774 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
1775 default: new_line
.clock_type
= CLOCK_DEFAULT
;
1778 new_line
.clock_rate
= info
->params
.clock_speed
;
1779 new_line
.loopback
= info
->params
.loopback
? 1:0;
1781 if (copy_to_user(line
, &new_line
, size
))
1785 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
1787 if(!capable(CAP_NET_ADMIN
))
1789 if (copy_from_user(&new_line
, line
, size
))
1792 switch (new_line
.clock_type
)
1794 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
1795 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
1796 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
1797 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
1798 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
1799 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
1800 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
1801 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
1802 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
1803 default: return -EINVAL
;
1806 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
1809 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
1810 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
1811 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
1812 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
1813 info
->params
.flags
|= flags
;
1815 info
->params
.loopback
= new_line
.loopback
;
1817 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
1818 info
->params
.clock_speed
= new_line
.clock_rate
;
1820 info
->params
.clock_speed
= 0;
1822 /* if network interface up, reprogram hardware */
1828 return hdlc_ioctl(dev
, ifr
, cmd
);
1833 * called by network layer when transmit timeout is detected
1835 * dev pointer to network device structure
1837 static void hdlcdev_tx_timeout(struct net_device
*dev
)
1839 SLMP_INFO
*info
= dev_to_port(dev
);
1840 unsigned long flags
;
1842 if (debug_level
>= DEBUG_LEVEL_INFO
)
1843 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
1845 dev
->stats
.tx_errors
++;
1846 dev
->stats
.tx_aborted_errors
++;
1848 spin_lock_irqsave(&info
->lock
,flags
);
1850 spin_unlock_irqrestore(&info
->lock
,flags
);
1852 netif_wake_queue(dev
);
1856 * called by device driver when transmit completes
1857 * reenable network layer transmit if stopped
1859 * info pointer to device instance information
1861 static void hdlcdev_tx_done(SLMP_INFO
*info
)
1863 if (netif_queue_stopped(info
->netdev
))
1864 netif_wake_queue(info
->netdev
);
1868 * called by device driver when frame received
1869 * pass frame to network layer
1871 * info pointer to device instance information
1872 * buf pointer to buffer contianing frame data
1873 * size count of data bytes in buf
1875 static void hdlcdev_rx(SLMP_INFO
*info
, char *buf
, int size
)
1877 struct sk_buff
*skb
= dev_alloc_skb(size
);
1878 struct net_device
*dev
= info
->netdev
;
1880 if (debug_level
>= DEBUG_LEVEL_INFO
)
1881 printk("hdlcdev_rx(%s)\n",dev
->name
);
1884 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n",
1886 dev
->stats
.rx_dropped
++;
1890 memcpy(skb_put(skb
, size
), buf
, size
);
1892 skb
->protocol
= hdlc_type_trans(skb
, dev
);
1894 dev
->stats
.rx_packets
++;
1895 dev
->stats
.rx_bytes
+= size
;
1900 static const struct net_device_ops hdlcdev_ops
= {
1901 .ndo_open
= hdlcdev_open
,
1902 .ndo_stop
= hdlcdev_close
,
1903 .ndo_change_mtu
= hdlc_change_mtu
,
1904 .ndo_start_xmit
= hdlc_start_xmit
,
1905 .ndo_do_ioctl
= hdlcdev_ioctl
,
1906 .ndo_tx_timeout
= hdlcdev_tx_timeout
,
1910 * called by device driver when adding device instance
1911 * do generic HDLC initialization
1913 * info pointer to device instance information
1915 * returns 0 if success, otherwise error code
1917 static int hdlcdev_init(SLMP_INFO
*info
)
1920 struct net_device
*dev
;
1923 /* allocate and initialize network and HDLC layer objects */
1925 if (!(dev
= alloc_hdlcdev(info
))) {
1926 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
1930 /* for network layer reporting purposes only */
1931 dev
->mem_start
= info
->phys_sca_base
;
1932 dev
->mem_end
= info
->phys_sca_base
+ SCA_BASE_SIZE
- 1;
1933 dev
->irq
= info
->irq_level
;
1935 /* network layer callbacks and settings */
1936 dev
->netdev_ops
= &hdlcdev_ops
;
1937 dev
->watchdog_timeo
= 10 * HZ
;
1938 dev
->tx_queue_len
= 50;
1940 /* generic HDLC layer callbacks and settings */
1941 hdlc
= dev_to_hdlc(dev
);
1942 hdlc
->attach
= hdlcdev_attach
;
1943 hdlc
->xmit
= hdlcdev_xmit
;
1945 /* register objects with HDLC layer */
1946 if ((rc
= register_hdlc_device(dev
))) {
1947 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
1957 * called by device driver when removing device instance
1958 * do generic HDLC cleanup
1960 * info pointer to device instance information
1962 static void hdlcdev_exit(SLMP_INFO
*info
)
1964 unregister_hdlc_device(info
->netdev
);
1965 free_netdev(info
->netdev
);
1966 info
->netdev
= NULL
;
1969 #endif /* CONFIG_HDLC */
1972 /* Return next bottom half action to perform.
1973 * Return Value: BH action code or 0 if nothing to do.
1975 static int bh_action(SLMP_INFO
*info
)
1977 unsigned long flags
;
1980 spin_lock_irqsave(&info
->lock
,flags
);
1982 if (info
->pending_bh
& BH_RECEIVE
) {
1983 info
->pending_bh
&= ~BH_RECEIVE
;
1985 } else if (info
->pending_bh
& BH_TRANSMIT
) {
1986 info
->pending_bh
&= ~BH_TRANSMIT
;
1988 } else if (info
->pending_bh
& BH_STATUS
) {
1989 info
->pending_bh
&= ~BH_STATUS
;
1994 /* Mark BH routine as complete */
1995 info
->bh_running
= false;
1996 info
->bh_requested
= false;
1999 spin_unlock_irqrestore(&info
->lock
,flags
);
2004 /* Perform bottom half processing of work items queued by ISR.
2006 static void bh_handler(struct work_struct
*work
)
2008 SLMP_INFO
*info
= container_of(work
, SLMP_INFO
, task
);
2011 if ( debug_level
>= DEBUG_LEVEL_BH
)
2012 printk( "%s(%d):%s bh_handler() entry\n",
2013 __FILE__
,__LINE__
,info
->device_name
);
2015 info
->bh_running
= true;
2017 while((action
= bh_action(info
)) != 0) {
2019 /* Process work item */
2020 if ( debug_level
>= DEBUG_LEVEL_BH
)
2021 printk( "%s(%d):%s bh_handler() work item action=%d\n",
2022 __FILE__
,__LINE__
,info
->device_name
, action
);
2036 /* unknown work item ID */
2037 printk("%s(%d):%s Unknown work item ID=%08X!\n",
2038 __FILE__
,__LINE__
,info
->device_name
,action
);
2043 if ( debug_level
>= DEBUG_LEVEL_BH
)
2044 printk( "%s(%d):%s bh_handler() exit\n",
2045 __FILE__
,__LINE__
,info
->device_name
);
2048 static void bh_receive(SLMP_INFO
*info
)
2050 if ( debug_level
>= DEBUG_LEVEL_BH
)
2051 printk( "%s(%d):%s bh_receive()\n",
2052 __FILE__
,__LINE__
,info
->device_name
);
2054 while( rx_get_frame(info
) );
2057 static void bh_transmit(SLMP_INFO
*info
)
2059 struct tty_struct
*tty
= info
->port
.tty
;
2061 if ( debug_level
>= DEBUG_LEVEL_BH
)
2062 printk( "%s(%d):%s bh_transmit() entry\n",
2063 __FILE__
,__LINE__
,info
->device_name
);
2069 static void bh_status(SLMP_INFO
*info
)
2071 if ( debug_level
>= DEBUG_LEVEL_BH
)
2072 printk( "%s(%d):%s bh_status() entry\n",
2073 __FILE__
,__LINE__
,info
->device_name
);
2075 info
->ri_chkcount
= 0;
2076 info
->dsr_chkcount
= 0;
2077 info
->dcd_chkcount
= 0;
2078 info
->cts_chkcount
= 0;
2081 static void isr_timer(SLMP_INFO
* info
)
2083 unsigned char timer
= (info
->port_num
& 1) ? TIMER2
: TIMER0
;
2085 /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */
2086 write_reg(info
, IER2
, 0);
2088 /* TMCS, Timer Control/Status Register
2090 * 07 CMF, Compare match flag (read only) 1=match
2091 * 06 ECMI, CMF Interrupt Enable: 0=disabled
2092 * 05 Reserved, must be 0
2093 * 04 TME, Timer Enable
2094 * 03..00 Reserved, must be 0
2098 write_reg(info
, (unsigned char)(timer
+ TMCS
), 0);
2100 info
->irq_occurred
= true;
2102 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2103 printk("%s(%d):%s isr_timer()\n",
2104 __FILE__
,__LINE__
,info
->device_name
);
2107 static void isr_rxint(SLMP_INFO
* info
)
2109 struct tty_struct
*tty
= info
->port
.tty
;
2110 struct mgsl_icount
*icount
= &info
->icount
;
2111 unsigned char status
= read_reg(info
, SR1
) & info
->ie1_value
& (FLGD
+ IDLD
+ CDCD
+ BRKD
);
2112 unsigned char status2
= read_reg(info
, SR2
) & info
->ie2_value
& OVRN
;
2114 /* clear status bits */
2116 write_reg(info
, SR1
, status
);
2119 write_reg(info
, SR2
, status2
);
2121 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2122 printk("%s(%d):%s isr_rxint status=%02X %02x\n",
2123 __FILE__
,__LINE__
,info
->device_name
,status
,status2
);
2125 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
2126 if (status
& BRKD
) {
2129 /* process break detection if tty control
2130 * is not set to ignore it
2132 if (!(status
& info
->ignore_status_mask1
)) {
2133 if (info
->read_status_mask1
& BRKD
) {
2134 tty_insert_flip_char(&info
->port
, 0, TTY_BREAK
);
2135 if (tty
&& (info
->port
.flags
& ASYNC_SAK
))
2142 if (status
& (FLGD
|IDLD
)) {
2144 info
->icount
.exithunt
++;
2145 else if (status
& IDLD
)
2146 info
->icount
.rxidle
++;
2147 wake_up_interruptible(&info
->event_wait_q
);
2151 if (status
& CDCD
) {
2152 /* simulate a common modem status change interrupt
2155 get_signals( info
);
2157 MISCSTATUS_DCD_LATCHED
|(info
->serial_signals
&SerialSignal_DCD
));
2162 * handle async rx data interrupts
2164 static void isr_rxrdy(SLMP_INFO
* info
)
2167 unsigned char DataByte
;
2168 struct mgsl_icount
*icount
= &info
->icount
;
2170 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2171 printk("%s(%d):%s isr_rxrdy\n",
2172 __FILE__
,__LINE__
,info
->device_name
);
2174 while((status
= read_reg(info
,CST0
)) & BIT0
)
2178 DataByte
= read_reg(info
,TRB
);
2182 if ( status
& (PE
+ FRME
+ OVRN
) ) {
2183 printk("%s(%d):%s rxerr=%04X\n",
2184 __FILE__
,__LINE__
,info
->device_name
,status
);
2186 /* update error statistics */
2189 else if (status
& FRME
)
2191 else if (status
& OVRN
)
2194 /* discard char if tty control flags say so */
2195 if (status
& info
->ignore_status_mask2
)
2198 status
&= info
->read_status_mask2
;
2202 else if (status
& FRME
)
2204 if (status
& OVRN
) {
2205 /* Overrun is special, since it's
2206 * reported immediately, and doesn't
2207 * affect the current character
2211 } /* end of if (error) */
2213 tty_insert_flip_char(&info
->port
, DataByte
, flag
);
2215 tty_insert_flip_char(&info
->port
, 0, TTY_OVERRUN
);
2218 if ( debug_level
>= DEBUG_LEVEL_ISR
) {
2219 printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
2220 __FILE__
,__LINE__
,info
->device_name
,
2221 icount
->rx
,icount
->brk
,icount
->parity
,
2222 icount
->frame
,icount
->overrun
);
2225 tty_flip_buffer_push(&info
->port
);
2228 static void isr_txeom(SLMP_INFO
* info
, unsigned char status
)
2230 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2231 printk("%s(%d):%s isr_txeom status=%02x\n",
2232 __FILE__
,__LINE__
,info
->device_name
,status
);
2234 write_reg(info
, TXDMA
+ DIR, 0x00); /* disable Tx DMA IRQs */
2235 write_reg(info
, TXDMA
+ DSR
, 0xc0); /* clear IRQs and disable DMA */
2236 write_reg(info
, TXDMA
+ DCMD
, SWABORT
); /* reset/init DMA channel */
2238 if (status
& UDRN
) {
2239 write_reg(info
, CMD
, TXRESET
);
2240 write_reg(info
, CMD
, TXENABLE
);
2242 write_reg(info
, CMD
, TXBUFCLR
);
2244 /* disable and clear tx interrupts */
2245 info
->ie0_value
&= ~TXRDYE
;
2246 info
->ie1_value
&= ~(IDLE
+ UDRN
);
2247 write_reg16(info
, IE0
, (unsigned short)((info
->ie1_value
<< 8) + info
->ie0_value
));
2248 write_reg(info
, SR1
, (unsigned char)(UDRN
+ IDLE
));
2250 if ( info
->tx_active
) {
2251 if (info
->params
.mode
!= MGSL_MODE_ASYNC
) {
2253 info
->icount
.txunder
++;
2254 else if (status
& IDLE
)
2255 info
->icount
.txok
++;
2258 info
->tx_active
= false;
2259 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
2261 del_timer(&info
->tx_timer
);
2263 if (info
->params
.mode
!= MGSL_MODE_ASYNC
&& info
->drop_rts_on_tx_done
) {
2264 info
->serial_signals
&= ~SerialSignal_RTS
;
2265 info
->drop_rts_on_tx_done
= false;
2269 #if SYNCLINK_GENERIC_HDLC
2271 hdlcdev_tx_done(info
);
2275 if (info
->port
.tty
&& (info
->port
.tty
->stopped
|| info
->port
.tty
->hw_stopped
)) {
2279 info
->pending_bh
|= BH_TRANSMIT
;
2286 * handle tx status interrupts
2288 static void isr_txint(SLMP_INFO
* info
)
2290 unsigned char status
= read_reg(info
, SR1
) & info
->ie1_value
& (UDRN
+ IDLE
+ CCTS
);
2292 /* clear status bits */
2293 write_reg(info
, SR1
, status
);
2295 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2296 printk("%s(%d):%s isr_txint status=%02x\n",
2297 __FILE__
,__LINE__
,info
->device_name
,status
);
2299 if (status
& (UDRN
+ IDLE
))
2300 isr_txeom(info
, status
);
2302 if (status
& CCTS
) {
2303 /* simulate a common modem status change interrupt
2306 get_signals( info
);
2308 MISCSTATUS_CTS_LATCHED
|(info
->serial_signals
&SerialSignal_CTS
));
2314 * handle async tx data interrupts
2316 static void isr_txrdy(SLMP_INFO
* info
)
2318 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2319 printk("%s(%d):%s isr_txrdy() tx_count=%d\n",
2320 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
2322 if (info
->params
.mode
!= MGSL_MODE_ASYNC
) {
2323 /* disable TXRDY IRQ, enable IDLE IRQ */
2324 info
->ie0_value
&= ~TXRDYE
;
2325 info
->ie1_value
|= IDLE
;
2326 write_reg16(info
, IE0
, (unsigned short)((info
->ie1_value
<< 8) + info
->ie0_value
));
2330 if (info
->port
.tty
&& (info
->port
.tty
->stopped
|| info
->port
.tty
->hw_stopped
)) {
2335 if ( info
->tx_count
)
2336 tx_load_fifo( info
);
2338 info
->tx_active
= false;
2339 info
->ie0_value
&= ~TXRDYE
;
2340 write_reg(info
, IE0
, info
->ie0_value
);
2343 if (info
->tx_count
< WAKEUP_CHARS
)
2344 info
->pending_bh
|= BH_TRANSMIT
;
2347 static void isr_rxdmaok(SLMP_INFO
* info
)
2349 /* BIT7 = EOT (end of transfer)
2350 * BIT6 = EOM (end of message/frame)
2352 unsigned char status
= read_reg(info
,RXDMA
+ DSR
) & 0xc0;
2354 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2355 write_reg(info
, RXDMA
+ DSR
, (unsigned char)(status
| 1));
2357 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2358 printk("%s(%d):%s isr_rxdmaok(), status=%02x\n",
2359 __FILE__
,__LINE__
,info
->device_name
,status
);
2361 info
->pending_bh
|= BH_RECEIVE
;
2364 static void isr_rxdmaerror(SLMP_INFO
* info
)
2366 /* BIT5 = BOF (buffer overflow)
2367 * BIT4 = COF (counter overflow)
2369 unsigned char status
= read_reg(info
,RXDMA
+ DSR
) & 0x30;
2371 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2372 write_reg(info
, RXDMA
+ DSR
, (unsigned char)(status
| 1));
2374 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2375 printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n",
2376 __FILE__
,__LINE__
,info
->device_name
,status
);
2378 info
->rx_overflow
= true;
2379 info
->pending_bh
|= BH_RECEIVE
;
2382 static void isr_txdmaok(SLMP_INFO
* info
)
2384 unsigned char status_reg1
= read_reg(info
, SR1
);
2386 write_reg(info
, TXDMA
+ DIR, 0x00); /* disable Tx DMA IRQs */
2387 write_reg(info
, TXDMA
+ DSR
, 0xc0); /* clear IRQs and disable DMA */
2388 write_reg(info
, TXDMA
+ DCMD
, SWABORT
); /* reset/init DMA channel */
2390 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2391 printk("%s(%d):%s isr_txdmaok(), status=%02x\n",
2392 __FILE__
,__LINE__
,info
->device_name
,status_reg1
);
2394 /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */
2395 write_reg16(info
, TRC0
, 0);
2396 info
->ie0_value
|= TXRDYE
;
2397 write_reg(info
, IE0
, info
->ie0_value
);
2400 static void isr_txdmaerror(SLMP_INFO
* info
)
2402 /* BIT5 = BOF (buffer overflow)
2403 * BIT4 = COF (counter overflow)
2405 unsigned char status
= read_reg(info
,TXDMA
+ DSR
) & 0x30;
2407 /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */
2408 write_reg(info
, TXDMA
+ DSR
, (unsigned char)(status
| 1));
2410 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2411 printk("%s(%d):%s isr_txdmaerror(), status=%02x\n",
2412 __FILE__
,__LINE__
,info
->device_name
,status
);
2415 /* handle input serial signal changes
2417 static void isr_io_pin( SLMP_INFO
*info
, u16 status
)
2419 struct mgsl_icount
*icount
;
2421 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2422 printk("%s(%d):isr_io_pin status=%04X\n",
2423 __FILE__
,__LINE__
,status
);
2425 if (status
& (MISCSTATUS_CTS_LATCHED
| MISCSTATUS_DCD_LATCHED
|
2426 MISCSTATUS_DSR_LATCHED
| MISCSTATUS_RI_LATCHED
) ) {
2427 icount
= &info
->icount
;
2428 /* update input line counters */
2429 if (status
& MISCSTATUS_RI_LATCHED
) {
2431 if ( status
& SerialSignal_RI
)
2432 info
->input_signal_events
.ri_up
++;
2434 info
->input_signal_events
.ri_down
++;
2436 if (status
& MISCSTATUS_DSR_LATCHED
) {
2438 if ( status
& SerialSignal_DSR
)
2439 info
->input_signal_events
.dsr_up
++;
2441 info
->input_signal_events
.dsr_down
++;
2443 if (status
& MISCSTATUS_DCD_LATCHED
) {
2444 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
) {
2445 info
->ie1_value
&= ~CDCD
;
2446 write_reg(info
, IE1
, info
->ie1_value
);
2449 if (status
& SerialSignal_DCD
) {
2450 info
->input_signal_events
.dcd_up
++;
2452 info
->input_signal_events
.dcd_down
++;
2453 #if SYNCLINK_GENERIC_HDLC
2454 if (info
->netcount
) {
2455 if (status
& SerialSignal_DCD
)
2456 netif_carrier_on(info
->netdev
);
2458 netif_carrier_off(info
->netdev
);
2462 if (status
& MISCSTATUS_CTS_LATCHED
)
2464 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
) {
2465 info
->ie1_value
&= ~CCTS
;
2466 write_reg(info
, IE1
, info
->ie1_value
);
2469 if ( status
& SerialSignal_CTS
)
2470 info
->input_signal_events
.cts_up
++;
2472 info
->input_signal_events
.cts_down
++;
2474 wake_up_interruptible(&info
->status_event_wait_q
);
2475 wake_up_interruptible(&info
->event_wait_q
);
2477 if ( (info
->port
.flags
& ASYNC_CHECK_CD
) &&
2478 (status
& MISCSTATUS_DCD_LATCHED
) ) {
2479 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2480 printk("%s CD now %s...", info
->device_name
,
2481 (status
& SerialSignal_DCD
) ? "on" : "off");
2482 if (status
& SerialSignal_DCD
)
2483 wake_up_interruptible(&info
->port
.open_wait
);
2485 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2486 printk("doing serial hangup...");
2488 tty_hangup(info
->port
.tty
);
2492 if (tty_port_cts_enabled(&info
->port
) &&
2493 (status
& MISCSTATUS_CTS_LATCHED
) ) {
2494 if ( info
->port
.tty
) {
2495 if (info
->port
.tty
->hw_stopped
) {
2496 if (status
& SerialSignal_CTS
) {
2497 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2498 printk("CTS tx start...");
2499 info
->port
.tty
->hw_stopped
= 0;
2501 info
->pending_bh
|= BH_TRANSMIT
;
2505 if (!(status
& SerialSignal_CTS
)) {
2506 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2507 printk("CTS tx stop...");
2508 info
->port
.tty
->hw_stopped
= 1;
2516 info
->pending_bh
|= BH_STATUS
;
2519 /* Interrupt service routine entry point.
2522 * irq interrupt number that caused interrupt
2523 * dev_id device ID supplied during interrupt registration
2524 * regs interrupted processor context
2526 static irqreturn_t
synclinkmp_interrupt(int dummy
, void *dev_id
)
2528 SLMP_INFO
*info
= dev_id
;
2529 unsigned char status
, status0
, status1
=0;
2530 unsigned char dmastatus
, dmastatus0
, dmastatus1
=0;
2531 unsigned char timerstatus0
, timerstatus1
=0;
2532 unsigned char shift
;
2536 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2537 printk(KERN_DEBUG
"%s(%d): synclinkmp_interrupt(%d)entry.\n",
2538 __FILE__
, __LINE__
, info
->irq_level
);
2540 spin_lock(&info
->lock
);
2544 /* get status for SCA0 (ports 0-1) */
2545 tmp
= read_reg16(info
, ISR0
); /* get ISR0 and ISR1 in one read */
2546 status0
= (unsigned char)tmp
;
2547 dmastatus0
= (unsigned char)(tmp
>>8);
2548 timerstatus0
= read_reg(info
, ISR2
);
2550 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2551 printk(KERN_DEBUG
"%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
2552 __FILE__
, __LINE__
, info
->device_name
,
2553 status0
, dmastatus0
, timerstatus0
);
2555 if (info
->port_count
== 4) {
2556 /* get status for SCA1 (ports 2-3) */
2557 tmp
= read_reg16(info
->port_array
[2], ISR0
);
2558 status1
= (unsigned char)tmp
;
2559 dmastatus1
= (unsigned char)(tmp
>>8);
2560 timerstatus1
= read_reg(info
->port_array
[2], ISR2
);
2562 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2563 printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n",
2564 __FILE__
,__LINE__
,info
->device_name
,
2565 status1
,dmastatus1
,timerstatus1
);
2568 if (!status0
&& !dmastatus0
&& !timerstatus0
&&
2569 !status1
&& !dmastatus1
&& !timerstatus1
)
2572 for(i
=0; i
< info
->port_count
; i
++) {
2573 if (info
->port_array
[i
] == NULL
)
2577 dmastatus
= dmastatus0
;
2580 dmastatus
= dmastatus1
;
2583 shift
= i
& 1 ? 4 :0;
2585 if (status
& BIT0
<< shift
)
2586 isr_rxrdy(info
->port_array
[i
]);
2587 if (status
& BIT1
<< shift
)
2588 isr_txrdy(info
->port_array
[i
]);
2589 if (status
& BIT2
<< shift
)
2590 isr_rxint(info
->port_array
[i
]);
2591 if (status
& BIT3
<< shift
)
2592 isr_txint(info
->port_array
[i
]);
2594 if (dmastatus
& BIT0
<< shift
)
2595 isr_rxdmaerror(info
->port_array
[i
]);
2596 if (dmastatus
& BIT1
<< shift
)
2597 isr_rxdmaok(info
->port_array
[i
]);
2598 if (dmastatus
& BIT2
<< shift
)
2599 isr_txdmaerror(info
->port_array
[i
]);
2600 if (dmastatus
& BIT3
<< shift
)
2601 isr_txdmaok(info
->port_array
[i
]);
2604 if (timerstatus0
& (BIT5
| BIT4
))
2605 isr_timer(info
->port_array
[0]);
2606 if (timerstatus0
& (BIT7
| BIT6
))
2607 isr_timer(info
->port_array
[1]);
2608 if (timerstatus1
& (BIT5
| BIT4
))
2609 isr_timer(info
->port_array
[2]);
2610 if (timerstatus1
& (BIT7
| BIT6
))
2611 isr_timer(info
->port_array
[3]);
2614 for(i
=0; i
< info
->port_count
; i
++) {
2615 SLMP_INFO
* port
= info
->port_array
[i
];
2617 /* Request bottom half processing if there's something
2618 * for it to do and the bh is not already running.
2620 * Note: startup adapter diags require interrupts.
2621 * do not request bottom half processing if the
2622 * device is not open in a normal mode.
2624 if ( port
&& (port
->port
.count
|| port
->netcount
) &&
2625 port
->pending_bh
&& !port
->bh_running
&&
2626 !port
->bh_requested
) {
2627 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2628 printk("%s(%d):%s queueing bh task.\n",
2629 __FILE__
,__LINE__
,port
->device_name
);
2630 schedule_work(&port
->task
);
2631 port
->bh_requested
= true;
2635 spin_unlock(&info
->lock
);
2637 if ( debug_level
>= DEBUG_LEVEL_ISR
)
2638 printk(KERN_DEBUG
"%s(%d):synclinkmp_interrupt(%d)exit.\n",
2639 __FILE__
, __LINE__
, info
->irq_level
);
2643 /* Initialize and start device.
2645 static int startup(SLMP_INFO
* info
)
2647 if ( debug_level
>= DEBUG_LEVEL_INFO
)
2648 printk("%s(%d):%s tx_releaseup()\n",__FILE__
,__LINE__
,info
->device_name
);
2650 if (info
->port
.flags
& ASYNC_INITIALIZED
)
2653 if (!info
->tx_buf
) {
2654 info
->tx_buf
= kmalloc(info
->max_frame_size
, GFP_KERNEL
);
2655 if (!info
->tx_buf
) {
2656 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
2657 __FILE__
,__LINE__
,info
->device_name
);
2662 info
->pending_bh
= 0;
2664 memset(&info
->icount
, 0, sizeof(info
->icount
));
2666 /* program hardware for current parameters */
2669 change_params(info
);
2671 mod_timer(&info
->status_timer
, jiffies
+ msecs_to_jiffies(10));
2674 clear_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
2676 info
->port
.flags
|= ASYNC_INITIALIZED
;
2681 /* Called by close() and hangup() to shutdown hardware
2683 static void shutdown(SLMP_INFO
* info
)
2685 unsigned long flags
;
2687 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
2690 if (debug_level
>= DEBUG_LEVEL_INFO
)
2691 printk("%s(%d):%s synclinkmp_shutdown()\n",
2692 __FILE__
,__LINE__
, info
->device_name
);
2694 /* clear status wait queue because status changes */
2695 /* can't happen after shutting down the hardware */
2696 wake_up_interruptible(&info
->status_event_wait_q
);
2697 wake_up_interruptible(&info
->event_wait_q
);
2699 del_timer(&info
->tx_timer
);
2700 del_timer(&info
->status_timer
);
2702 kfree(info
->tx_buf
);
2703 info
->tx_buf
= NULL
;
2705 spin_lock_irqsave(&info
->lock
,flags
);
2709 if (!info
->port
.tty
|| info
->port
.tty
->termios
.c_cflag
& HUPCL
) {
2710 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
2714 spin_unlock_irqrestore(&info
->lock
,flags
);
2717 set_bit(TTY_IO_ERROR
, &info
->port
.tty
->flags
);
2719 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
2722 static void program_hw(SLMP_INFO
*info
)
2724 unsigned long flags
;
2726 spin_lock_irqsave(&info
->lock
,flags
);
2731 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
2733 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
2740 info
->dcd_chkcount
= 0;
2741 info
->cts_chkcount
= 0;
2742 info
->ri_chkcount
= 0;
2743 info
->dsr_chkcount
= 0;
2745 info
->ie1_value
|= (CDCD
|CCTS
);
2746 write_reg(info
, IE1
, info
->ie1_value
);
2750 if (info
->netcount
|| (info
->port
.tty
&& info
->port
.tty
->termios
.c_cflag
& CREAD
) )
2753 spin_unlock_irqrestore(&info
->lock
,flags
);
2756 /* Reconfigure adapter based on new parameters
2758 static void change_params(SLMP_INFO
*info
)
2763 if (!info
->port
.tty
)
2766 if (debug_level
>= DEBUG_LEVEL_INFO
)
2767 printk("%s(%d):%s change_params()\n",
2768 __FILE__
,__LINE__
, info
->device_name
);
2770 cflag
= info
->port
.tty
->termios
.c_cflag
;
2772 /* if B0 rate (hangup) specified then negate RTS and DTR */
2773 /* otherwise assert RTS and DTR */
2775 info
->serial_signals
|= SerialSignal_RTS
| SerialSignal_DTR
;
2777 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
2779 /* byte size and parity */
2781 switch (cflag
& CSIZE
) {
2782 case CS5
: info
->params
.data_bits
= 5; break;
2783 case CS6
: info
->params
.data_bits
= 6; break;
2784 case CS7
: info
->params
.data_bits
= 7; break;
2785 case CS8
: info
->params
.data_bits
= 8; break;
2786 /* Never happens, but GCC is too dumb to figure it out */
2787 default: info
->params
.data_bits
= 7; break;
2791 info
->params
.stop_bits
= 2;
2793 info
->params
.stop_bits
= 1;
2795 info
->params
.parity
= ASYNC_PARITY_NONE
;
2796 if (cflag
& PARENB
) {
2798 info
->params
.parity
= ASYNC_PARITY_ODD
;
2800 info
->params
.parity
= ASYNC_PARITY_EVEN
;
2803 info
->params
.parity
= ASYNC_PARITY_SPACE
;
2807 /* calculate number of jiffies to transmit a full
2808 * FIFO (32 bytes) at specified data rate
2810 bits_per_char
= info
->params
.data_bits
+
2811 info
->params
.stop_bits
+ 1;
2813 /* if port data rate is set to 460800 or less then
2814 * allow tty settings to override, otherwise keep the
2815 * current data rate.
2817 if (info
->params
.data_rate
<= 460800) {
2818 info
->params
.data_rate
= tty_get_baud_rate(info
->port
.tty
);
2821 if ( info
->params
.data_rate
) {
2822 info
->timeout
= (32*HZ
*bits_per_char
) /
2823 info
->params
.data_rate
;
2825 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
2827 if (cflag
& CRTSCTS
)
2828 info
->port
.flags
|= ASYNC_CTS_FLOW
;
2830 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
2833 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
2835 info
->port
.flags
|= ASYNC_CHECK_CD
;
2837 /* process tty input control flags */
2839 info
->read_status_mask2
= OVRN
;
2840 if (I_INPCK(info
->port
.tty
))
2841 info
->read_status_mask2
|= PE
| FRME
;
2842 if (I_BRKINT(info
->port
.tty
) || I_PARMRK(info
->port
.tty
))
2843 info
->read_status_mask1
|= BRKD
;
2844 if (I_IGNPAR(info
->port
.tty
))
2845 info
->ignore_status_mask2
|= PE
| FRME
;
2846 if (I_IGNBRK(info
->port
.tty
)) {
2847 info
->ignore_status_mask1
|= BRKD
;
2848 /* If ignoring parity and break indicators, ignore
2849 * overruns too. (For real raw support).
2851 if (I_IGNPAR(info
->port
.tty
))
2852 info
->ignore_status_mask2
|= OVRN
;
2858 static int get_stats(SLMP_INFO
* info
, struct mgsl_icount __user
*user_icount
)
2862 if (debug_level
>= DEBUG_LEVEL_INFO
)
2863 printk("%s(%d):%s get_params()\n",
2864 __FILE__
,__LINE__
, info
->device_name
);
2867 memset(&info
->icount
, 0, sizeof(info
->icount
));
2869 mutex_lock(&info
->port
.mutex
);
2870 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
2871 mutex_unlock(&info
->port
.mutex
);
2879 static int get_params(SLMP_INFO
* info
, MGSL_PARAMS __user
*user_params
)
2882 if (debug_level
>= DEBUG_LEVEL_INFO
)
2883 printk("%s(%d):%s get_params()\n",
2884 __FILE__
,__LINE__
, info
->device_name
);
2886 mutex_lock(&info
->port
.mutex
);
2887 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
2888 mutex_unlock(&info
->port
.mutex
);
2890 if ( debug_level
>= DEBUG_LEVEL_INFO
)
2891 printk( "%s(%d):%s get_params() user buffer copy failed\n",
2892 __FILE__
,__LINE__
,info
->device_name
);
2899 static int set_params(SLMP_INFO
* info
, MGSL_PARAMS __user
*new_params
)
2901 unsigned long flags
;
2902 MGSL_PARAMS tmp_params
;
2905 if (debug_level
>= DEBUG_LEVEL_INFO
)
2906 printk("%s(%d):%s set_params\n",
2907 __FILE__
,__LINE__
,info
->device_name
);
2908 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
2910 if ( debug_level
>= DEBUG_LEVEL_INFO
)
2911 printk( "%s(%d):%s set_params() user buffer copy failed\n",
2912 __FILE__
,__LINE__
,info
->device_name
);
2916 mutex_lock(&info
->port
.mutex
);
2917 spin_lock_irqsave(&info
->lock
,flags
);
2918 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
2919 spin_unlock_irqrestore(&info
->lock
,flags
);
2921 change_params(info
);
2922 mutex_unlock(&info
->port
.mutex
);
2927 static int get_txidle(SLMP_INFO
* info
, int __user
*idle_mode
)
2931 if (debug_level
>= DEBUG_LEVEL_INFO
)
2932 printk("%s(%d):%s get_txidle()=%d\n",
2933 __FILE__
,__LINE__
, info
->device_name
, info
->idle_mode
);
2935 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
2937 if ( debug_level
>= DEBUG_LEVEL_INFO
)
2938 printk( "%s(%d):%s get_txidle() user buffer copy failed\n",
2939 __FILE__
,__LINE__
,info
->device_name
);
2946 static int set_txidle(SLMP_INFO
* info
, int idle_mode
)
2948 unsigned long flags
;
2950 if (debug_level
>= DEBUG_LEVEL_INFO
)
2951 printk("%s(%d):%s set_txidle(%d)\n",
2952 __FILE__
,__LINE__
,info
->device_name
, idle_mode
);
2954 spin_lock_irqsave(&info
->lock
,flags
);
2955 info
->idle_mode
= idle_mode
;
2956 tx_set_idle( info
);
2957 spin_unlock_irqrestore(&info
->lock
,flags
);
2961 static int tx_enable(SLMP_INFO
* info
, int enable
)
2963 unsigned long flags
;
2965 if (debug_level
>= DEBUG_LEVEL_INFO
)
2966 printk("%s(%d):%s tx_enable(%d)\n",
2967 __FILE__
,__LINE__
,info
->device_name
, enable
);
2969 spin_lock_irqsave(&info
->lock
,flags
);
2971 if ( !info
->tx_enabled
) {
2975 if ( info
->tx_enabled
)
2978 spin_unlock_irqrestore(&info
->lock
,flags
);
2982 /* abort send HDLC frame
2984 static int tx_abort(SLMP_INFO
* info
)
2986 unsigned long flags
;
2988 if (debug_level
>= DEBUG_LEVEL_INFO
)
2989 printk("%s(%d):%s tx_abort()\n",
2990 __FILE__
,__LINE__
,info
->device_name
);
2992 spin_lock_irqsave(&info
->lock
,flags
);
2993 if ( info
->tx_active
&& info
->params
.mode
== MGSL_MODE_HDLC
) {
2994 info
->ie1_value
&= ~UDRN
;
2995 info
->ie1_value
|= IDLE
;
2996 write_reg(info
, IE1
, info
->ie1_value
); /* disable tx status interrupts */
2997 write_reg(info
, SR1
, (unsigned char)(IDLE
+ UDRN
)); /* clear pending */
2999 write_reg(info
, TXDMA
+ DSR
, 0); /* disable DMA channel */
3000 write_reg(info
, TXDMA
+ DCMD
, SWABORT
); /* reset/init DMA channel */
3002 write_reg(info
, CMD
, TXABORT
);
3004 spin_unlock_irqrestore(&info
->lock
,flags
);
3008 static int rx_enable(SLMP_INFO
* info
, int enable
)
3010 unsigned long flags
;
3012 if (debug_level
>= DEBUG_LEVEL_INFO
)
3013 printk("%s(%d):%s rx_enable(%d)\n",
3014 __FILE__
,__LINE__
,info
->device_name
,enable
);
3016 spin_lock_irqsave(&info
->lock
,flags
);
3018 if ( !info
->rx_enabled
)
3021 if ( info
->rx_enabled
)
3024 spin_unlock_irqrestore(&info
->lock
,flags
);
3028 /* wait for specified event to occur
3030 static int wait_mgsl_event(SLMP_INFO
* info
, int __user
*mask_ptr
)
3032 unsigned long flags
;
3035 struct mgsl_icount cprev
, cnow
;
3038 struct _input_signal_events oldsigs
, newsigs
;
3039 DECLARE_WAITQUEUE(wait
, current
);
3041 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
3046 if (debug_level
>= DEBUG_LEVEL_INFO
)
3047 printk("%s(%d):%s wait_mgsl_event(%d)\n",
3048 __FILE__
,__LINE__
,info
->device_name
,mask
);
3050 spin_lock_irqsave(&info
->lock
,flags
);
3052 /* return immediately if state matches requested events */
3054 s
= info
->serial_signals
;
3057 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
3058 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
3059 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
3060 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
3062 spin_unlock_irqrestore(&info
->lock
,flags
);
3066 /* save current irq counts */
3067 cprev
= info
->icount
;
3068 oldsigs
= info
->input_signal_events
;
3070 /* enable hunt and idle irqs if needed */
3071 if (mask
& (MgslEvent_ExitHuntMode
+MgslEvent_IdleReceived
)) {
3072 unsigned char oldval
= info
->ie1_value
;
3073 unsigned char newval
= oldval
+
3074 (mask
& MgslEvent_ExitHuntMode
? FLGD
:0) +
3075 (mask
& MgslEvent_IdleReceived
? IDLD
:0);
3076 if ( oldval
!= newval
) {
3077 info
->ie1_value
= newval
;
3078 write_reg(info
, IE1
, info
->ie1_value
);
3082 set_current_state(TASK_INTERRUPTIBLE
);
3083 add_wait_queue(&info
->event_wait_q
, &wait
);
3085 spin_unlock_irqrestore(&info
->lock
,flags
);
3089 if (signal_pending(current
)) {
3094 /* get current irq counts */
3095 spin_lock_irqsave(&info
->lock
,flags
);
3096 cnow
= info
->icount
;
3097 newsigs
= info
->input_signal_events
;
3098 set_current_state(TASK_INTERRUPTIBLE
);
3099 spin_unlock_irqrestore(&info
->lock
,flags
);
3101 /* if no change, wait aborted for some reason */
3102 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
3103 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
3104 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
3105 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
3106 newsigs
.cts_up
== oldsigs
.cts_up
&&
3107 newsigs
.cts_down
== oldsigs
.cts_down
&&
3108 newsigs
.ri_up
== oldsigs
.ri_up
&&
3109 newsigs
.ri_down
== oldsigs
.ri_down
&&
3110 cnow
.exithunt
== cprev
.exithunt
&&
3111 cnow
.rxidle
== cprev
.rxidle
) {
3117 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
3118 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
3119 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
3120 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
3121 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
3122 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
3123 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
3124 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
3125 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
3126 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
3134 remove_wait_queue(&info
->event_wait_q
, &wait
);
3135 set_current_state(TASK_RUNNING
);
3138 if (mask
& (MgslEvent_ExitHuntMode
+ MgslEvent_IdleReceived
)) {
3139 spin_lock_irqsave(&info
->lock
,flags
);
3140 if (!waitqueue_active(&info
->event_wait_q
)) {
3141 /* disable enable exit hunt mode/idle rcvd IRQs */
3142 info
->ie1_value
&= ~(FLGD
|IDLD
);
3143 write_reg(info
, IE1
, info
->ie1_value
);
3145 spin_unlock_irqrestore(&info
->lock
,flags
);
3149 PUT_USER(rc
, events
, mask_ptr
);
3154 static int modem_input_wait(SLMP_INFO
*info
,int arg
)
3156 unsigned long flags
;
3158 struct mgsl_icount cprev
, cnow
;
3159 DECLARE_WAITQUEUE(wait
, current
);
3161 /* save current irq counts */
3162 spin_lock_irqsave(&info
->lock
,flags
);
3163 cprev
= info
->icount
;
3164 add_wait_queue(&info
->status_event_wait_q
, &wait
);
3165 set_current_state(TASK_INTERRUPTIBLE
);
3166 spin_unlock_irqrestore(&info
->lock
,flags
);
3170 if (signal_pending(current
)) {
3175 /* get new irq counts */
3176 spin_lock_irqsave(&info
->lock
,flags
);
3177 cnow
= info
->icount
;
3178 set_current_state(TASK_INTERRUPTIBLE
);
3179 spin_unlock_irqrestore(&info
->lock
,flags
);
3181 /* if no change, wait aborted for some reason */
3182 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
3183 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
3188 /* check for change in caller specified modem input */
3189 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
3190 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
3191 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
3192 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
3199 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
3200 set_current_state(TASK_RUNNING
);
3204 /* return the state of the serial control and status signals
3206 static int tiocmget(struct tty_struct
*tty
)
3208 SLMP_INFO
*info
= tty
->driver_data
;
3209 unsigned int result
;
3210 unsigned long flags
;
3212 spin_lock_irqsave(&info
->lock
,flags
);
3214 spin_unlock_irqrestore(&info
->lock
,flags
);
3216 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
: 0) |
3217 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
: 0) |
3218 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
: 0) |
3219 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
: 0) |
3220 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
: 0) |
3221 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
: 0);
3223 if (debug_level
>= DEBUG_LEVEL_INFO
)
3224 printk("%s(%d):%s tiocmget() value=%08X\n",
3225 __FILE__
,__LINE__
, info
->device_name
, result
);
3229 /* set modem control signals (DTR/RTS)
3231 static int tiocmset(struct tty_struct
*tty
,
3232 unsigned int set
, unsigned int clear
)
3234 SLMP_INFO
*info
= tty
->driver_data
;
3235 unsigned long flags
;
3237 if (debug_level
>= DEBUG_LEVEL_INFO
)
3238 printk("%s(%d):%s tiocmset(%x,%x)\n",
3239 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
3241 if (set
& TIOCM_RTS
)
3242 info
->serial_signals
|= SerialSignal_RTS
;
3243 if (set
& TIOCM_DTR
)
3244 info
->serial_signals
|= SerialSignal_DTR
;
3245 if (clear
& TIOCM_RTS
)
3246 info
->serial_signals
&= ~SerialSignal_RTS
;
3247 if (clear
& TIOCM_DTR
)
3248 info
->serial_signals
&= ~SerialSignal_DTR
;
3250 spin_lock_irqsave(&info
->lock
,flags
);
3252 spin_unlock_irqrestore(&info
->lock
,flags
);
3257 static int carrier_raised(struct tty_port
*port
)
3259 SLMP_INFO
*info
= container_of(port
, SLMP_INFO
, port
);
3260 unsigned long flags
;
3262 spin_lock_irqsave(&info
->lock
,flags
);
3264 spin_unlock_irqrestore(&info
->lock
,flags
);
3266 return (info
->serial_signals
& SerialSignal_DCD
) ? 1 : 0;
3269 static void dtr_rts(struct tty_port
*port
, int on
)
3271 SLMP_INFO
*info
= container_of(port
, SLMP_INFO
, port
);
3272 unsigned long flags
;
3274 spin_lock_irqsave(&info
->lock
,flags
);
3276 info
->serial_signals
|= SerialSignal_RTS
| SerialSignal_DTR
;
3278 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
3280 spin_unlock_irqrestore(&info
->lock
,flags
);
3283 /* Block the current process until the specified port is ready to open.
3285 static int block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
3288 DECLARE_WAITQUEUE(wait
, current
);
3290 bool do_clocal
= false;
3291 bool extra_count
= false;
3292 unsigned long flags
;
3294 struct tty_port
*port
= &info
->port
;
3296 if (debug_level
>= DEBUG_LEVEL_INFO
)
3297 printk("%s(%d):%s block_til_ready()\n",
3298 __FILE__
,__LINE__
, tty
->driver
->name
);
3300 if (filp
->f_flags
& O_NONBLOCK
|| tty
->flags
& (1 << TTY_IO_ERROR
)){
3301 /* nonblock mode is set or port is not enabled */
3302 /* just verify that callout device is not active */
3303 port
->flags
|= ASYNC_NORMAL_ACTIVE
;
3307 if (tty
->termios
.c_cflag
& CLOCAL
)
3310 /* Wait for carrier detect and the line to become
3311 * free (i.e., not in use by the callout). While we are in
3312 * this loop, port->count is dropped by one, so that
3313 * close() knows when to free things. We restore it upon
3314 * exit, either normal or abnormal.
3318 add_wait_queue(&port
->open_wait
, &wait
);
3320 if (debug_level
>= DEBUG_LEVEL_INFO
)
3321 printk("%s(%d):%s block_til_ready() before block, count=%d\n",
3322 __FILE__
,__LINE__
, tty
->driver
->name
, port
->count
);
3324 spin_lock_irqsave(&info
->lock
, flags
);
3325 if (!tty_hung_up_p(filp
)) {
3329 spin_unlock_irqrestore(&info
->lock
, flags
);
3330 port
->blocked_open
++;
3333 if (C_BAUD(tty
) && test_bit(ASYNCB_INITIALIZED
, &port
->flags
))
3334 tty_port_raise_dtr_rts(port
);
3336 set_current_state(TASK_INTERRUPTIBLE
);
3338 if (tty_hung_up_p(filp
) || !(port
->flags
& ASYNC_INITIALIZED
)){
3339 retval
= (port
->flags
& ASYNC_HUP_NOTIFY
) ?
3340 -EAGAIN
: -ERESTARTSYS
;
3344 cd
= tty_port_carrier_raised(port
);
3346 if (!(port
->flags
& ASYNC_CLOSING
) && (do_clocal
|| cd
))
3349 if (signal_pending(current
)) {
3350 retval
= -ERESTARTSYS
;
3354 if (debug_level
>= DEBUG_LEVEL_INFO
)
3355 printk("%s(%d):%s block_til_ready() count=%d\n",
3356 __FILE__
,__LINE__
, tty
->driver
->name
, port
->count
);
3363 set_current_state(TASK_RUNNING
);
3364 remove_wait_queue(&port
->open_wait
, &wait
);
3368 port
->blocked_open
--;
3370 if (debug_level
>= DEBUG_LEVEL_INFO
)
3371 printk("%s(%d):%s block_til_ready() after, count=%d\n",
3372 __FILE__
,__LINE__
, tty
->driver
->name
, port
->count
);
3375 port
->flags
|= ASYNC_NORMAL_ACTIVE
;
3380 static int alloc_dma_bufs(SLMP_INFO
*info
)
3382 unsigned short BuffersPerFrame
;
3383 unsigned short BufferCount
;
3385 // Force allocation to start at 64K boundary for each port.
3386 // This is necessary because *all* buffer descriptors for a port
3387 // *must* be in the same 64K block. All descriptors on a port
3388 // share a common 'base' address (upper 8 bits of 24 bits) programmed
3389 // into the CBP register.
3390 info
->port_array
[0]->last_mem_alloc
= (SCA_MEM_SIZE
/4) * info
->port_num
;
3392 /* Calculate the number of DMA buffers necessary to hold the */
3393 /* largest allowable frame size. Note: If the max frame size is */
3394 /* not an even multiple of the DMA buffer size then we need to */
3395 /* round the buffer count per frame up one. */
3397 BuffersPerFrame
= (unsigned short)(info
->max_frame_size
/SCABUFSIZE
);
3398 if ( info
->max_frame_size
% SCABUFSIZE
)
3401 /* calculate total number of data buffers (SCABUFSIZE) possible
3402 * in one ports memory (SCA_MEM_SIZE/4) after allocating memory
3403 * for the descriptor list (BUFFERLISTSIZE).
3405 BufferCount
= (SCA_MEM_SIZE
/4 - BUFFERLISTSIZE
)/SCABUFSIZE
;
3407 /* limit number of buffers to maximum amount of descriptors */
3408 if (BufferCount
> BUFFERLISTSIZE
/sizeof(SCADESC
))
3409 BufferCount
= BUFFERLISTSIZE
/sizeof(SCADESC
);
3411 /* use enough buffers to transmit one max size frame */
3412 info
->tx_buf_count
= BuffersPerFrame
+ 1;
3414 /* never use more than half the available buffers for transmit */
3415 if (info
->tx_buf_count
> (BufferCount
/2))
3416 info
->tx_buf_count
= BufferCount
/2;
3418 if (info
->tx_buf_count
> SCAMAXDESC
)
3419 info
->tx_buf_count
= SCAMAXDESC
;
3421 /* use remaining buffers for receive */
3422 info
->rx_buf_count
= BufferCount
- info
->tx_buf_count
;
3424 if (info
->rx_buf_count
> SCAMAXDESC
)
3425 info
->rx_buf_count
= SCAMAXDESC
;
3427 if ( debug_level
>= DEBUG_LEVEL_INFO
)
3428 printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n",
3429 __FILE__
,__LINE__
, info
->device_name
,
3430 info
->tx_buf_count
,info
->rx_buf_count
);
3432 if ( alloc_buf_list( info
) < 0 ||
3433 alloc_frame_bufs(info
,
3435 info
->rx_buf_list_ex
,
3436 info
->rx_buf_count
) < 0 ||
3437 alloc_frame_bufs(info
,
3439 info
->tx_buf_list_ex
,
3440 info
->tx_buf_count
) < 0 ||
3441 alloc_tmp_rx_buf(info
) < 0 ) {
3442 printk("%s(%d):%s Can't allocate DMA buffer memory\n",
3443 __FILE__
,__LINE__
, info
->device_name
);
3447 rx_reset_buffers( info
);
3452 /* Allocate DMA buffers for the transmit and receive descriptor lists.
3454 static int alloc_buf_list(SLMP_INFO
*info
)
3458 /* build list in adapter shared memory */
3459 info
->buffer_list
= info
->memory_base
+ info
->port_array
[0]->last_mem_alloc
;
3460 info
->buffer_list_phys
= info
->port_array
[0]->last_mem_alloc
;
3461 info
->port_array
[0]->last_mem_alloc
+= BUFFERLISTSIZE
;
3463 memset(info
->buffer_list
, 0, BUFFERLISTSIZE
);
3465 /* Save virtual address pointers to the receive and */
3466 /* transmit buffer lists. (Receive 1st). These pointers will */
3467 /* be used by the processor to access the lists. */
3468 info
->rx_buf_list
= (SCADESC
*)info
->buffer_list
;
3470 info
->tx_buf_list
= (SCADESC
*)info
->buffer_list
;
3471 info
->tx_buf_list
+= info
->rx_buf_count
;
3473 /* Build links for circular buffer entry lists (tx and rx)
3475 * Note: links are physical addresses read by the SCA device
3476 * to determine the next buffer entry to use.
3479 for ( i
= 0; i
< info
->rx_buf_count
; i
++ ) {
3480 /* calculate and store physical address of this buffer entry */
3481 info
->rx_buf_list_ex
[i
].phys_entry
=
3482 info
->buffer_list_phys
+ (i
* SCABUFSIZE
);
3484 /* calculate and store physical address of */
3485 /* next entry in cirular list of entries */
3486 info
->rx_buf_list
[i
].next
= info
->buffer_list_phys
;
3487 if ( i
< info
->rx_buf_count
- 1 )
3488 info
->rx_buf_list
[i
].next
+= (i
+ 1) * sizeof(SCADESC
);
3490 info
->rx_buf_list
[i
].length
= SCABUFSIZE
;
3493 for ( i
= 0; i
< info
->tx_buf_count
; i
++ ) {
3494 /* calculate and store physical address of this buffer entry */
3495 info
->tx_buf_list_ex
[i
].phys_entry
= info
->buffer_list_phys
+
3496 ((info
->rx_buf_count
+ i
) * sizeof(SCADESC
));
3498 /* calculate and store physical address of */
3499 /* next entry in cirular list of entries */
3501 info
->tx_buf_list
[i
].next
= info
->buffer_list_phys
+
3502 info
->rx_buf_count
* sizeof(SCADESC
);
3504 if ( i
< info
->tx_buf_count
- 1 )
3505 info
->tx_buf_list
[i
].next
+= (i
+ 1) * sizeof(SCADESC
);
3511 /* Allocate the frame DMA buffers used by the specified buffer list.
3513 static int alloc_frame_bufs(SLMP_INFO
*info
, SCADESC
*buf_list
,SCADESC_EX
*buf_list_ex
,int count
)
3516 unsigned long phys_addr
;
3518 for ( i
= 0; i
< count
; i
++ ) {
3519 buf_list_ex
[i
].virt_addr
= info
->memory_base
+ info
->port_array
[0]->last_mem_alloc
;
3520 phys_addr
= info
->port_array
[0]->last_mem_alloc
;
3521 info
->port_array
[0]->last_mem_alloc
+= SCABUFSIZE
;
3523 buf_list
[i
].buf_ptr
= (unsigned short)phys_addr
;
3524 buf_list
[i
].buf_base
= (unsigned char)(phys_addr
>> 16);
3530 static void free_dma_bufs(SLMP_INFO
*info
)
3532 info
->buffer_list
= NULL
;
3533 info
->rx_buf_list
= NULL
;
3534 info
->tx_buf_list
= NULL
;
3537 /* allocate buffer large enough to hold max_frame_size.
3538 * This buffer is used to pass an assembled frame to the line discipline.
3540 static int alloc_tmp_rx_buf(SLMP_INFO
*info
)
3542 info
->tmp_rx_buf
= kmalloc(info
->max_frame_size
, GFP_KERNEL
);
3543 if (info
->tmp_rx_buf
== NULL
)
3545 /* unused flag buffer to satisfy receive_buf calling interface */
3546 info
->flag_buf
= kzalloc(info
->max_frame_size
, GFP_KERNEL
);
3547 if (!info
->flag_buf
) {
3548 kfree(info
->tmp_rx_buf
);
3549 info
->tmp_rx_buf
= NULL
;
3555 static void free_tmp_rx_buf(SLMP_INFO
*info
)
3557 kfree(info
->tmp_rx_buf
);
3558 info
->tmp_rx_buf
= NULL
;
3559 kfree(info
->flag_buf
);
3560 info
->flag_buf
= NULL
;
3563 static int claim_resources(SLMP_INFO
*info
)
3565 if (request_mem_region(info
->phys_memory_base
,SCA_MEM_SIZE
,"synclinkmp") == NULL
) {
3566 printk( "%s(%d):%s mem addr conflict, Addr=%08X\n",
3567 __FILE__
,__LINE__
,info
->device_name
, info
->phys_memory_base
);
3568 info
->init_error
= DiagStatus_AddressConflict
;
3572 info
->shared_mem_requested
= true;
3574 if (request_mem_region(info
->phys_lcr_base
+ info
->lcr_offset
,128,"synclinkmp") == NULL
) {
3575 printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n",
3576 __FILE__
,__LINE__
,info
->device_name
, info
->phys_lcr_base
);
3577 info
->init_error
= DiagStatus_AddressConflict
;
3581 info
->lcr_mem_requested
= true;
3583 if (request_mem_region(info
->phys_sca_base
+ info
->sca_offset
,SCA_BASE_SIZE
,"synclinkmp") == NULL
) {
3584 printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n",
3585 __FILE__
,__LINE__
,info
->device_name
, info
->phys_sca_base
);
3586 info
->init_error
= DiagStatus_AddressConflict
;
3590 info
->sca_base_requested
= true;
3592 if (request_mem_region(info
->phys_statctrl_base
+ info
->statctrl_offset
,SCA_REG_SIZE
,"synclinkmp") == NULL
) {
3593 printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n",
3594 __FILE__
,__LINE__
,info
->device_name
, info
->phys_statctrl_base
);
3595 info
->init_error
= DiagStatus_AddressConflict
;
3599 info
->sca_statctrl_requested
= true;
3601 info
->memory_base
= ioremap_nocache(info
->phys_memory_base
,
3603 if (!info
->memory_base
) {
3604 printk( "%s(%d):%s Can't map shared memory, MemAddr=%08X\n",
3605 __FILE__
,__LINE__
,info
->device_name
, info
->phys_memory_base
);
3606 info
->init_error
= DiagStatus_CantAssignPciResources
;
3610 info
->lcr_base
= ioremap_nocache(info
->phys_lcr_base
, PAGE_SIZE
);
3611 if (!info
->lcr_base
) {
3612 printk( "%s(%d):%s Can't map LCR memory, MemAddr=%08X\n",
3613 __FILE__
,__LINE__
,info
->device_name
, info
->phys_lcr_base
);
3614 info
->init_error
= DiagStatus_CantAssignPciResources
;
3617 info
->lcr_base
+= info
->lcr_offset
;
3619 info
->sca_base
= ioremap_nocache(info
->phys_sca_base
, PAGE_SIZE
);
3620 if (!info
->sca_base
) {
3621 printk( "%s(%d):%s Can't map SCA memory, MemAddr=%08X\n",
3622 __FILE__
,__LINE__
,info
->device_name
, info
->phys_sca_base
);
3623 info
->init_error
= DiagStatus_CantAssignPciResources
;
3626 info
->sca_base
+= info
->sca_offset
;
3628 info
->statctrl_base
= ioremap_nocache(info
->phys_statctrl_base
,
3630 if (!info
->statctrl_base
) {
3631 printk( "%s(%d):%s Can't map SCA Status/Control memory, MemAddr=%08X\n",
3632 __FILE__
,__LINE__
,info
->device_name
, info
->phys_statctrl_base
);
3633 info
->init_error
= DiagStatus_CantAssignPciResources
;
3636 info
->statctrl_base
+= info
->statctrl_offset
;
3638 if ( !memory_test(info
) ) {
3639 printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n",
3640 __FILE__
,__LINE__
,info
->device_name
, info
->phys_memory_base
);
3641 info
->init_error
= DiagStatus_MemoryError
;
3648 release_resources( info
);
3652 static void release_resources(SLMP_INFO
*info
)
3654 if ( debug_level
>= DEBUG_LEVEL_INFO
)
3655 printk( "%s(%d):%s release_resources() entry\n",
3656 __FILE__
,__LINE__
,info
->device_name
);
3658 if ( info
->irq_requested
) {
3659 free_irq(info
->irq_level
, info
);
3660 info
->irq_requested
= false;
3663 if ( info
->shared_mem_requested
) {
3664 release_mem_region(info
->phys_memory_base
,SCA_MEM_SIZE
);
3665 info
->shared_mem_requested
= false;
3667 if ( info
->lcr_mem_requested
) {
3668 release_mem_region(info
->phys_lcr_base
+ info
->lcr_offset
,128);
3669 info
->lcr_mem_requested
= false;
3671 if ( info
->sca_base_requested
) {
3672 release_mem_region(info
->phys_sca_base
+ info
->sca_offset
,SCA_BASE_SIZE
);
3673 info
->sca_base_requested
= false;
3675 if ( info
->sca_statctrl_requested
) {
3676 release_mem_region(info
->phys_statctrl_base
+ info
->statctrl_offset
,SCA_REG_SIZE
);
3677 info
->sca_statctrl_requested
= false;
3680 if (info
->memory_base
){
3681 iounmap(info
->memory_base
);
3682 info
->memory_base
= NULL
;
3685 if (info
->sca_base
) {
3686 iounmap(info
->sca_base
- info
->sca_offset
);
3687 info
->sca_base
=NULL
;
3690 if (info
->statctrl_base
) {
3691 iounmap(info
->statctrl_base
- info
->statctrl_offset
);
3692 info
->statctrl_base
=NULL
;
3695 if (info
->lcr_base
){
3696 iounmap(info
->lcr_base
- info
->lcr_offset
);
3697 info
->lcr_base
= NULL
;
3700 if ( debug_level
>= DEBUG_LEVEL_INFO
)
3701 printk( "%s(%d):%s release_resources() exit\n",
3702 __FILE__
,__LINE__
,info
->device_name
);
3705 /* Add the specified device instance data structure to the
3706 * global linked list of devices and increment the device count.
3708 static void add_device(SLMP_INFO
*info
)
3710 info
->next_device
= NULL
;
3711 info
->line
= synclinkmp_device_count
;
3712 sprintf(info
->device_name
,"ttySLM%dp%d",info
->adapter_num
,info
->port_num
);
3714 if (info
->line
< MAX_DEVICES
) {
3715 if (maxframe
[info
->line
])
3716 info
->max_frame_size
= maxframe
[info
->line
];
3719 synclinkmp_device_count
++;
3721 if ( !synclinkmp_device_list
)
3722 synclinkmp_device_list
= info
;
3724 SLMP_INFO
*current_dev
= synclinkmp_device_list
;
3725 while( current_dev
->next_device
)
3726 current_dev
= current_dev
->next_device
;
3727 current_dev
->next_device
= info
;
3730 if ( info
->max_frame_size
< 4096 )
3731 info
->max_frame_size
= 4096;
3732 else if ( info
->max_frame_size
> 65535 )
3733 info
->max_frame_size
= 65535;
3735 printk( "SyncLink MultiPort %s: "
3736 "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n",
3738 info
->phys_sca_base
,
3739 info
->phys_memory_base
,
3740 info
->phys_statctrl_base
,
3741 info
->phys_lcr_base
,
3743 info
->max_frame_size
);
3745 #if SYNCLINK_GENERIC_HDLC
3750 static const struct tty_port_operations port_ops
= {
3751 .carrier_raised
= carrier_raised
,
3755 /* Allocate and initialize a device instance structure
3757 * Return Value: pointer to SLMP_INFO if success, otherwise NULL
3759 static SLMP_INFO
*alloc_dev(int adapter_num
, int port_num
, struct pci_dev
*pdev
)
3763 info
= kzalloc(sizeof(SLMP_INFO
),
3767 printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n",
3768 __FILE__
,__LINE__
, adapter_num
, port_num
);
3770 tty_port_init(&info
->port
);
3771 info
->port
.ops
= &port_ops
;
3772 info
->magic
= MGSL_MAGIC
;
3773 INIT_WORK(&info
->task
, bh_handler
);
3774 info
->max_frame_size
= 4096;
3775 info
->port
.close_delay
= 5*HZ
/10;
3776 info
->port
.closing_wait
= 30*HZ
;
3777 init_waitqueue_head(&info
->status_event_wait_q
);
3778 init_waitqueue_head(&info
->event_wait_q
);
3779 spin_lock_init(&info
->netlock
);
3780 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
3781 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
3782 info
->adapter_num
= adapter_num
;
3783 info
->port_num
= port_num
;
3785 /* Copy configuration info to device instance data */
3786 info
->irq_level
= pdev
->irq
;
3787 info
->phys_lcr_base
= pci_resource_start(pdev
,0);
3788 info
->phys_sca_base
= pci_resource_start(pdev
,2);
3789 info
->phys_memory_base
= pci_resource_start(pdev
,3);
3790 info
->phys_statctrl_base
= pci_resource_start(pdev
,4);
3792 /* Because veremap only works on page boundaries we must map
3793 * a larger area than is actually implemented for the LCR
3794 * memory range. We map a full page starting at the page boundary.
3796 info
->lcr_offset
= info
->phys_lcr_base
& (PAGE_SIZE
-1);
3797 info
->phys_lcr_base
&= ~(PAGE_SIZE
-1);
3799 info
->sca_offset
= info
->phys_sca_base
& (PAGE_SIZE
-1);
3800 info
->phys_sca_base
&= ~(PAGE_SIZE
-1);
3802 info
->statctrl_offset
= info
->phys_statctrl_base
& (PAGE_SIZE
-1);
3803 info
->phys_statctrl_base
&= ~(PAGE_SIZE
-1);
3805 info
->bus_type
= MGSL_BUS_TYPE_PCI
;
3806 info
->irq_flags
= IRQF_SHARED
;
3808 setup_timer(&info
->tx_timer
, tx_timeout
, (unsigned long)info
);
3809 setup_timer(&info
->status_timer
, status_timeout
,
3810 (unsigned long)info
);
3812 /* Store the PCI9050 misc control register value because a flaw
3813 * in the PCI9050 prevents LCR registers from being read if
3814 * BIOS assigns an LCR base address with bit 7 set.
3816 * Only the misc control register is accessed for which only
3817 * write access is needed, so set an initial value and change
3818 * bits to the device instance data as we write the value
3819 * to the actual misc control register.
3821 info
->misc_ctrl_value
= 0x087e4546;
3823 /* initial port state is unknown - if startup errors
3824 * occur, init_error will be set to indicate the
3825 * problem. Once the port is fully initialized,
3826 * this value will be set to 0 to indicate the
3827 * port is available.
3829 info
->init_error
= -1;
3835 static void device_init(int adapter_num
, struct pci_dev
*pdev
)
3837 SLMP_INFO
*port_array
[SCA_MAX_PORTS
];
3840 /* allocate device instances for up to SCA_MAX_PORTS devices */
3841 for ( port
= 0; port
< SCA_MAX_PORTS
; ++port
) {
3842 port_array
[port
] = alloc_dev(adapter_num
,port
,pdev
);
3843 if( port_array
[port
] == NULL
) {
3844 for (--port
; port
>= 0; --port
) {
3845 tty_port_destroy(&port_array
[port
]->port
);
3846 kfree(port_array
[port
]);
3852 /* give copy of port_array to all ports and add to device list */
3853 for ( port
= 0; port
< SCA_MAX_PORTS
; ++port
) {
3854 memcpy(port_array
[port
]->port_array
,port_array
,sizeof(port_array
));
3855 add_device( port_array
[port
] );
3856 spin_lock_init(&port_array
[port
]->lock
);
3859 /* Allocate and claim adapter resources */
3860 if ( !claim_resources(port_array
[0]) ) {
3862 alloc_dma_bufs(port_array
[0]);
3864 /* copy resource information from first port to others */
3865 for ( port
= 1; port
< SCA_MAX_PORTS
; ++port
) {
3866 port_array
[port
]->lock
= port_array
[0]->lock
;
3867 port_array
[port
]->irq_level
= port_array
[0]->irq_level
;
3868 port_array
[port
]->memory_base
= port_array
[0]->memory_base
;
3869 port_array
[port
]->sca_base
= port_array
[0]->sca_base
;
3870 port_array
[port
]->statctrl_base
= port_array
[0]->statctrl_base
;
3871 port_array
[port
]->lcr_base
= port_array
[0]->lcr_base
;
3872 alloc_dma_bufs(port_array
[port
]);
3875 if ( request_irq(port_array
[0]->irq_level
,
3876 synclinkmp_interrupt
,
3877 port_array
[0]->irq_flags
,
3878 port_array
[0]->device_name
,
3879 port_array
[0]) < 0 ) {
3880 printk( "%s(%d):%s Can't request interrupt, IRQ=%d\n",
3882 port_array
[0]->device_name
,
3883 port_array
[0]->irq_level
);
3886 port_array
[0]->irq_requested
= true;
3887 adapter_test(port_array
[0]);
3892 static const struct tty_operations ops
= {
3897 .put_char
= put_char
,
3898 .flush_chars
= flush_chars
,
3899 .write_room
= write_room
,
3900 .chars_in_buffer
= chars_in_buffer
,
3901 .flush_buffer
= flush_buffer
,
3903 .throttle
= throttle
,
3904 .unthrottle
= unthrottle
,
3905 .send_xchar
= send_xchar
,
3906 .break_ctl
= set_break
,
3907 .wait_until_sent
= wait_until_sent
,
3908 .set_termios
= set_termios
,
3910 .start
= tx_release
,
3912 .tiocmget
= tiocmget
,
3913 .tiocmset
= tiocmset
,
3914 .get_icount
= get_icount
,
3915 .proc_fops
= &synclinkmp_proc_fops
,
3919 static void synclinkmp_cleanup(void)
3925 printk("Unloading %s %s\n", driver_name
, driver_version
);
3927 if (serial_driver
) {
3928 if ((rc
= tty_unregister_driver(serial_driver
)))
3929 printk("%s(%d) failed to unregister tty driver err=%d\n",
3930 __FILE__
,__LINE__
,rc
);
3931 put_tty_driver(serial_driver
);
3935 info
= synclinkmp_device_list
;
3938 info
= info
->next_device
;
3941 /* release devices */
3942 info
= synclinkmp_device_list
;
3944 #if SYNCLINK_GENERIC_HDLC
3947 free_dma_bufs(info
);
3948 free_tmp_rx_buf(info
);
3949 if ( info
->port_num
== 0 ) {
3951 write_reg(info
, LPR
, 1); /* set low power mode */
3952 release_resources(info
);
3955 info
= info
->next_device
;
3956 tty_port_destroy(&tmp
->port
);
3960 pci_unregister_driver(&synclinkmp_pci_driver
);
3963 /* Driver initialization entry point.
3966 static int __init
synclinkmp_init(void)
3970 if (break_on_load
) {
3971 synclinkmp_get_text_ptr();
3975 printk("%s %s\n", driver_name
, driver_version
);
3977 if ((rc
= pci_register_driver(&synclinkmp_pci_driver
)) < 0) {
3978 printk("%s:failed to register PCI driver, error=%d\n",__FILE__
,rc
);
3982 serial_driver
= alloc_tty_driver(128);
3983 if (!serial_driver
) {
3988 /* Initialize the tty_driver structure */
3990 serial_driver
->driver_name
= "synclinkmp";
3991 serial_driver
->name
= "ttySLM";
3992 serial_driver
->major
= ttymajor
;
3993 serial_driver
->minor_start
= 64;
3994 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
3995 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
3996 serial_driver
->init_termios
= tty_std_termios
;
3997 serial_driver
->init_termios
.c_cflag
=
3998 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
3999 serial_driver
->init_termios
.c_ispeed
= 9600;
4000 serial_driver
->init_termios
.c_ospeed
= 9600;
4001 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
4002 tty_set_operations(serial_driver
, &ops
);
4003 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
4004 printk("%s(%d):Couldn't register serial driver\n",
4006 put_tty_driver(serial_driver
);
4007 serial_driver
= NULL
;
4011 printk("%s %s, tty major#%d\n",
4012 driver_name
, driver_version
,
4013 serial_driver
->major
);
4018 synclinkmp_cleanup();
4022 static void __exit
synclinkmp_exit(void)
4024 synclinkmp_cleanup();
4027 module_init(synclinkmp_init
);
4028 module_exit(synclinkmp_exit
);
4030 /* Set the port for internal loopback mode.
4031 * The TxCLK and RxCLK signals are generated from the BRG and
4032 * the TxD is looped back to the RxD internally.
4034 static void enable_loopback(SLMP_INFO
*info
, int enable
)
4037 /* MD2 (Mode Register 2)
4038 * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback
4040 write_reg(info
, MD2
, (unsigned char)(read_reg(info
, MD2
) | (BIT1
+ BIT0
)));
4042 /* degate external TxC clock source */
4043 info
->port_array
[0]->ctrlreg_value
|= (BIT0
<< (info
->port_num
* 2));
4044 write_control_reg(info
);
4046 /* RXS/TXS (Rx/Tx clock source)
4047 * 07 Reserved, must be 0
4048 * 06..04 Clock Source, 100=BRG
4049 * 03..00 Clock Divisor, 0000=1
4051 write_reg(info
, RXS
, 0x40);
4052 write_reg(info
, TXS
, 0x40);
4055 /* MD2 (Mode Register 2)
4056 * 01..00 CNCT<1..0> Channel connection, 0=normal
4058 write_reg(info
, MD2
, (unsigned char)(read_reg(info
, MD2
) & ~(BIT1
+ BIT0
)));
4060 /* RXS/TXS (Rx/Tx clock source)
4061 * 07 Reserved, must be 0
4062 * 06..04 Clock Source, 000=RxC/TxC Pin
4063 * 03..00 Clock Divisor, 0000=1
4065 write_reg(info
, RXS
, 0x00);
4066 write_reg(info
, TXS
, 0x00);
4069 /* set LinkSpeed if available, otherwise default to 2Mbps */
4070 if (info
->params
.clock_speed
)
4071 set_rate(info
, info
->params
.clock_speed
);
4073 set_rate(info
, 3686400);
4076 /* Set the baud rate register to the desired speed
4078 * data_rate data rate of clock in bits per second
4079 * A data rate of 0 disables the AUX clock.
4081 static void set_rate( SLMP_INFO
*info
, u32 data_rate
)
4084 unsigned char BRValue
;
4087 /* fBRG = fCLK/(TMC * 2^BR)
4089 if (data_rate
!= 0) {
4090 Divisor
= 14745600/data_rate
;
4097 if (TMCValue
!= 1 && TMCValue
!= 2) {
4098 /* BRValue of 0 provides 50/50 duty cycle *only* when
4099 * TMCValue is 1 or 2. BRValue of 1 to 9 always provides
4106 /* while TMCValue is too big for TMC register, divide
4107 * by 2 and increment BR exponent.
4109 for(; TMCValue
> 256 && BRValue
< 10; BRValue
++)
4112 write_reg(info
, TXS
,
4113 (unsigned char)((read_reg(info
, TXS
) & 0xf0) | BRValue
));
4114 write_reg(info
, RXS
,
4115 (unsigned char)((read_reg(info
, RXS
) & 0xf0) | BRValue
));
4116 write_reg(info
, TMC
, (unsigned char)TMCValue
);
4119 write_reg(info
, TXS
,0);
4120 write_reg(info
, RXS
,0);
4121 write_reg(info
, TMC
, 0);
4127 static void rx_stop(SLMP_INFO
*info
)
4129 if (debug_level
>= DEBUG_LEVEL_ISR
)
4130 printk("%s(%d):%s rx_stop()\n",
4131 __FILE__
,__LINE__
, info
->device_name
);
4133 write_reg(info
, CMD
, RXRESET
);
4135 info
->ie0_value
&= ~RXRDYE
;
4136 write_reg(info
, IE0
, info
->ie0_value
); /* disable Rx data interrupts */
4138 write_reg(info
, RXDMA
+ DSR
, 0); /* disable Rx DMA */
4139 write_reg(info
, RXDMA
+ DCMD
, SWABORT
); /* reset/init Rx DMA */
4140 write_reg(info
, RXDMA
+ DIR, 0); /* disable Rx DMA interrupts */
4142 info
->rx_enabled
= false;
4143 info
->rx_overflow
= false;
4146 /* enable the receiver
4148 static void rx_start(SLMP_INFO
*info
)
4152 if (debug_level
>= DEBUG_LEVEL_ISR
)
4153 printk("%s(%d):%s rx_start()\n",
4154 __FILE__
,__LINE__
, info
->device_name
);
4156 write_reg(info
, CMD
, RXRESET
);
4158 if ( info
->params
.mode
== MGSL_MODE_HDLC
) {
4159 /* HDLC, disabe IRQ on rxdata */
4160 info
->ie0_value
&= ~RXRDYE
;
4161 write_reg(info
, IE0
, info
->ie0_value
);
4163 /* Reset all Rx DMA buffers and program rx dma */
4164 write_reg(info
, RXDMA
+ DSR
, 0); /* disable Rx DMA */
4165 write_reg(info
, RXDMA
+ DCMD
, SWABORT
); /* reset/init Rx DMA */
4167 for (i
= 0; i
< info
->rx_buf_count
; i
++) {
4168 info
->rx_buf_list
[i
].status
= 0xff;
4170 // throttle to 4 shared memory writes at a time to prevent
4171 // hogging local bus (keep latency time for DMA requests low).
4173 read_status_reg(info
);
4175 info
->current_rx_buf
= 0;
4177 /* set current/1st descriptor address */
4178 write_reg16(info
, RXDMA
+ CDA
,
4179 info
->rx_buf_list_ex
[0].phys_entry
);
4181 /* set new last rx descriptor address */
4182 write_reg16(info
, RXDMA
+ EDA
,
4183 info
->rx_buf_list_ex
[info
->rx_buf_count
- 1].phys_entry
);
4185 /* set buffer length (shared by all rx dma data buffers) */
4186 write_reg16(info
, RXDMA
+ BFL
, SCABUFSIZE
);
4188 write_reg(info
, RXDMA
+ DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */
4189 write_reg(info
, RXDMA
+ DSR
, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */
4191 /* async, enable IRQ on rxdata */
4192 info
->ie0_value
|= RXRDYE
;
4193 write_reg(info
, IE0
, info
->ie0_value
);
4196 write_reg(info
, CMD
, RXENABLE
);
4198 info
->rx_overflow
= false;
4199 info
->rx_enabled
= true;
4202 /* Enable the transmitter and send a transmit frame if
4203 * one is loaded in the DMA buffers.
4205 static void tx_start(SLMP_INFO
*info
)
4207 if (debug_level
>= DEBUG_LEVEL_ISR
)
4208 printk("%s(%d):%s tx_start() tx_count=%d\n",
4209 __FILE__
,__LINE__
, info
->device_name
,info
->tx_count
);
4211 if (!info
->tx_enabled
) {
4212 write_reg(info
, CMD
, TXRESET
);
4213 write_reg(info
, CMD
, TXENABLE
);
4214 info
->tx_enabled
= true;
4217 if ( info
->tx_count
) {
4219 /* If auto RTS enabled and RTS is inactive, then assert */
4220 /* RTS and set a flag indicating that the driver should */
4221 /* negate RTS when the transmission completes. */
4223 info
->drop_rts_on_tx_done
= false;
4225 if (info
->params
.mode
!= MGSL_MODE_ASYNC
) {
4227 if ( info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
4228 get_signals( info
);
4229 if ( !(info
->serial_signals
& SerialSignal_RTS
) ) {
4230 info
->serial_signals
|= SerialSignal_RTS
;
4231 set_signals( info
);
4232 info
->drop_rts_on_tx_done
= true;
4236 write_reg16(info
, TRC0
,
4237 (unsigned short)(((tx_negate_fifo_level
-1)<<8) + tx_active_fifo_level
));
4239 write_reg(info
, TXDMA
+ DSR
, 0); /* disable DMA channel */
4240 write_reg(info
, TXDMA
+ DCMD
, SWABORT
); /* reset/init DMA channel */
4242 /* set TX CDA (current descriptor address) */
4243 write_reg16(info
, TXDMA
+ CDA
,
4244 info
->tx_buf_list_ex
[0].phys_entry
);
4246 /* set TX EDA (last descriptor address) */
4247 write_reg16(info
, TXDMA
+ EDA
,
4248 info
->tx_buf_list_ex
[info
->last_tx_buf
].phys_entry
);
4250 /* enable underrun IRQ */
4251 info
->ie1_value
&= ~IDLE
;
4252 info
->ie1_value
|= UDRN
;
4253 write_reg(info
, IE1
, info
->ie1_value
);
4254 write_reg(info
, SR1
, (unsigned char)(IDLE
+ UDRN
));
4256 write_reg(info
, TXDMA
+ DIR, 0x40); /* enable Tx DMA interrupts (EOM) */
4257 write_reg(info
, TXDMA
+ DSR
, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */
4259 mod_timer(&info
->tx_timer
, jiffies
+
4260 msecs_to_jiffies(5000));
4264 /* async, enable IRQ on txdata */
4265 info
->ie0_value
|= TXRDYE
;
4266 write_reg(info
, IE0
, info
->ie0_value
);
4269 info
->tx_active
= true;
4273 /* stop the transmitter and DMA
4275 static void tx_stop( SLMP_INFO
*info
)
4277 if (debug_level
>= DEBUG_LEVEL_ISR
)
4278 printk("%s(%d):%s tx_stop()\n",
4279 __FILE__
,__LINE__
, info
->device_name
);
4281 del_timer(&info
->tx_timer
);
4283 write_reg(info
, TXDMA
+ DSR
, 0); /* disable DMA channel */
4284 write_reg(info
, TXDMA
+ DCMD
, SWABORT
); /* reset/init DMA channel */
4286 write_reg(info
, CMD
, TXRESET
);
4288 info
->ie1_value
&= ~(UDRN
+ IDLE
);
4289 write_reg(info
, IE1
, info
->ie1_value
); /* disable tx status interrupts */
4290 write_reg(info
, SR1
, (unsigned char)(IDLE
+ UDRN
)); /* clear pending */
4292 info
->ie0_value
&= ~TXRDYE
;
4293 write_reg(info
, IE0
, info
->ie0_value
); /* disable tx data interrupts */
4295 info
->tx_enabled
= false;
4296 info
->tx_active
= false;
4299 /* Fill the transmit FIFO until the FIFO is full or
4300 * there is no more data to load.
4302 static void tx_load_fifo(SLMP_INFO
*info
)
4306 /* do nothing is now tx data available and no XON/XOFF pending */
4308 if ( !info
->tx_count
&& !info
->x_char
)
4311 /* load the Transmit FIFO until FIFOs full or all data sent */
4313 while( info
->tx_count
&& (read_reg(info
,SR0
) & BIT1
) ) {
4315 /* there is more space in the transmit FIFO and */
4316 /* there is more data in transmit buffer */
4318 if ( (info
->tx_count
> 1) && !info
->x_char
) {
4320 TwoBytes
[0] = info
->tx_buf
[info
->tx_get
++];
4321 if (info
->tx_get
>= info
->max_frame_size
)
4322 info
->tx_get
-= info
->max_frame_size
;
4323 TwoBytes
[1] = info
->tx_buf
[info
->tx_get
++];
4324 if (info
->tx_get
>= info
->max_frame_size
)
4325 info
->tx_get
-= info
->max_frame_size
;
4327 write_reg16(info
, TRB
, *((u16
*)TwoBytes
));
4329 info
->tx_count
-= 2;
4330 info
->icount
.tx
+= 2;
4332 /* only 1 byte left to transmit or 1 FIFO slot left */
4335 /* transmit pending high priority char */
4336 write_reg(info
, TRB
, info
->x_char
);
4339 write_reg(info
, TRB
, info
->tx_buf
[info
->tx_get
++]);
4340 if (info
->tx_get
>= info
->max_frame_size
)
4341 info
->tx_get
-= info
->max_frame_size
;
4349 /* Reset a port to a known state
4351 static void reset_port(SLMP_INFO
*info
)
4353 if (info
->sca_base
) {
4358 info
->serial_signals
&= ~(SerialSignal_RTS
| SerialSignal_DTR
);
4361 /* disable all port interrupts */
4362 info
->ie0_value
= 0;
4363 info
->ie1_value
= 0;
4364 info
->ie2_value
= 0;
4365 write_reg(info
, IE0
, info
->ie0_value
);
4366 write_reg(info
, IE1
, info
->ie1_value
);
4367 write_reg(info
, IE2
, info
->ie2_value
);
4369 write_reg(info
, CMD
, CHRESET
);
4373 /* Reset all the ports to a known state.
4375 static void reset_adapter(SLMP_INFO
*info
)
4379 for ( i
=0; i
< SCA_MAX_PORTS
; ++i
) {
4380 if (info
->port_array
[i
])
4381 reset_port(info
->port_array
[i
]);
4385 /* Program port for asynchronous communications.
4387 static void async_mode(SLMP_INFO
*info
)
4390 unsigned char RegValue
;
4395 /* MD0, Mode Register 0
4397 * 07..05 PRCTL<2..0>, Protocol Mode, 000=async
4398 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4399 * 03 Reserved, must be 0
4400 * 02 CRCCC, CRC Calculation, 0=disabled
4401 * 01..00 STOP<1..0> Stop bits (00=1,10=2)
4406 if (info
->params
.stop_bits
!= 1)
4408 write_reg(info
, MD0
, RegValue
);
4410 /* MD1, Mode Register 1
4412 * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64
4413 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5
4414 * 03..02 RXCHR<1..0>, rx char size
4415 * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd
4420 switch (info
->params
.data_bits
) {
4421 case 7: RegValue
|= BIT4
+ BIT2
; break;
4422 case 6: RegValue
|= BIT5
+ BIT3
; break;
4423 case 5: RegValue
|= BIT5
+ BIT4
+ BIT3
+ BIT2
; break;
4425 if (info
->params
.parity
!= ASYNC_PARITY_NONE
) {
4427 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
4430 write_reg(info
, MD1
, RegValue
);
4432 /* MD2, Mode Register 2
4434 * 07..02 Reserved, must be 0
4435 * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback
4440 if (info
->params
.loopback
)
4441 RegValue
|= (BIT1
+ BIT0
);
4442 write_reg(info
, MD2
, RegValue
);
4444 /* RXS, Receive clock source
4446 * 07 Reserved, must be 0
4447 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4448 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4451 write_reg(info
, RXS
, RegValue
);
4453 /* TXS, Transmit clock source
4455 * 07 Reserved, must be 0
4456 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4457 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4460 write_reg(info
, TXS
, RegValue
);
4464 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4466 info
->port_array
[0]->ctrlreg_value
|= (BIT0
<< (info
->port_num
* 2));
4467 write_control_reg(info
);
4471 /* RRC Receive Ready Control 0
4473 * 07..05 Reserved, must be 0
4474 * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte
4476 write_reg(info
, RRC
, 0x00);
4478 /* TRC0 Transmit Ready Control 0
4480 * 07..05 Reserved, must be 0
4481 * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes
4483 write_reg(info
, TRC0
, 0x10);
4485 /* TRC1 Transmit Ready Control 1
4487 * 07..05 Reserved, must be 0
4488 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1)
4490 write_reg(info
, TRC1
, 0x1e);
4492 /* CTL, MSCI control register
4494 * 07..06 Reserved, set to 0
4495 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4496 * 04 IDLC, idle control, 0=mark 1=idle register
4497 * 03 BRK, break, 0=off 1 =on (async)
4498 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4499 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4500 * 00 RTS, RTS output control, 0=active 1=inactive
4505 if (!(info
->serial_signals
& SerialSignal_RTS
))
4507 write_reg(info
, CTL
, RegValue
);
4509 /* enable status interrupts */
4510 info
->ie0_value
|= TXINTE
+ RXINTE
;
4511 write_reg(info
, IE0
, info
->ie0_value
);
4513 /* enable break detect interrupt */
4514 info
->ie1_value
= BRKD
;
4515 write_reg(info
, IE1
, info
->ie1_value
);
4517 /* enable rx overrun interrupt */
4518 info
->ie2_value
= OVRN
;
4519 write_reg(info
, IE2
, info
->ie2_value
);
4521 set_rate( info
, info
->params
.data_rate
* 16 );
4524 /* Program the SCA for HDLC communications.
4526 static void hdlc_mode(SLMP_INFO
*info
)
4528 unsigned char RegValue
;
4531 // Can't use DPLL because SCA outputs recovered clock on RxC when
4532 // DPLL mode selected. This causes output contention with RxC receiver.
4533 // Use of DPLL would require external hardware to disable RxC receiver
4534 // when DPLL mode selected.
4535 info
->params
.flags
&= ~(HDLC_FLAG_TXC_DPLL
+ HDLC_FLAG_RXC_DPLL
);
4537 /* disable DMA interrupts */
4538 write_reg(info
, TXDMA
+ DIR, 0);
4539 write_reg(info
, RXDMA
+ DIR, 0);
4541 /* MD0, Mode Register 0
4543 * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC
4544 * 04 AUTO, Auto-enable (RTS/CTS/DCD)
4545 * 03 Reserved, must be 0
4546 * 02 CRCCC, CRC Calculation, 1=enabled
4547 * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16
4548 * 00 CRC0, CRC initial value, 1 = all 1s
4553 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
4555 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
4557 if (info
->params
.crc_type
== HDLC_CRC_16_CCITT
)
4558 RegValue
|= BIT2
+ BIT1
;
4559 write_reg(info
, MD0
, RegValue
);
4561 /* MD1, Mode Register 1
4563 * 07..06 ADDRS<1..0>, Address detect, 00=no addr check
4564 * 05..04 TXCHR<1..0>, tx char size, 00=8 bits
4565 * 03..02 RXCHR<1..0>, rx char size, 00=8 bits
4566 * 01..00 PMPM<1..0>, Parity mode, 00=no parity
4571 write_reg(info
, MD1
, RegValue
);
4573 /* MD2, Mode Register 2
4575 * 07 NRZFM, 0=NRZ, 1=FM
4576 * 06..05 CODE<1..0> Encoding, 00=NRZ
4577 * 04..03 DRATE<1..0> DPLL Divisor, 00=8
4578 * 02 Reserved, must be 0
4579 * 01..00 CNCT<1..0> Channel connection, 0=normal
4584 switch(info
->params
.encoding
) {
4585 case HDLC_ENCODING_NRZI
: RegValue
|= BIT5
; break;
4586 case HDLC_ENCODING_BIPHASE_MARK
: RegValue
|= BIT7
+ BIT5
; break; /* aka FM1 */
4587 case HDLC_ENCODING_BIPHASE_SPACE
: RegValue
|= BIT7
+ BIT6
; break; /* aka FM0 */
4588 case HDLC_ENCODING_BIPHASE_LEVEL
: RegValue
|= BIT7
; break; /* aka Manchester */
4590 case HDLC_ENCODING_NRZB
: /* not supported */
4591 case HDLC_ENCODING_NRZI_MARK
: /* not supported */
4592 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL
: /* not supported */
4595 if ( info
->params
.flags
& HDLC_FLAG_DPLL_DIV16
) {
4598 } else if ( info
->params
.flags
& HDLC_FLAG_DPLL_DIV8
) {
4604 write_reg(info
, MD2
, RegValue
);
4607 /* RXS, Receive clock source
4609 * 07 Reserved, must be 0
4610 * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL
4611 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4614 if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
)
4616 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
4617 RegValue
|= BIT6
+ BIT5
;
4618 write_reg(info
, RXS
, RegValue
);
4620 /* TXS, Transmit clock source
4622 * 07 Reserved, must be 0
4623 * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock
4624 * 03..00 RXBR<3..0>, rate divisor, 0000=1
4627 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
)
4629 if (info
->params
.flags
& HDLC_FLAG_TXC_DPLL
)
4630 RegValue
|= BIT6
+ BIT5
;
4631 write_reg(info
, TXS
, RegValue
);
4633 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
4634 set_rate(info
, info
->params
.clock_speed
* DpllDivisor
);
4636 set_rate(info
, info
->params
.clock_speed
);
4638 /* GPDATA (General Purpose I/O Data Register)
4640 * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out
4642 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
)
4643 info
->port_array
[0]->ctrlreg_value
|= (BIT0
<< (info
->port_num
* 2));
4645 info
->port_array
[0]->ctrlreg_value
&= ~(BIT0
<< (info
->port_num
* 2));
4646 write_control_reg(info
);
4648 /* RRC Receive Ready Control 0
4650 * 07..05 Reserved, must be 0
4651 * 04..00 RRC<4..0> Rx FIFO trigger active
4653 write_reg(info
, RRC
, rx_active_fifo_level
);
4655 /* TRC0 Transmit Ready Control 0
4657 * 07..05 Reserved, must be 0
4658 * 04..00 TRC<4..0> Tx FIFO trigger active
4660 write_reg(info
, TRC0
, tx_active_fifo_level
);
4662 /* TRC1 Transmit Ready Control 1
4664 * 07..05 Reserved, must be 0
4665 * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full)
4667 write_reg(info
, TRC1
, (unsigned char)(tx_negate_fifo_level
- 1));
4669 /* DMR, DMA Mode Register
4671 * 07..05 Reserved, must be 0
4672 * 04 TMOD, Transfer Mode: 1=chained-block
4673 * 03 Reserved, must be 0
4674 * 02 NF, Number of Frames: 1=multi-frame
4675 * 01 CNTE, Frame End IRQ Counter enable: 0=disabled
4676 * 00 Reserved, must be 0
4680 write_reg(info
, TXDMA
+ DMR
, 0x14);
4681 write_reg(info
, RXDMA
+ DMR
, 0x14);
4683 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4684 write_reg(info
, RXDMA
+ CPB
,
4685 (unsigned char)(info
->buffer_list_phys
>> 16));
4687 /* Set chain pointer base (upper 8 bits of 24 bit addr) */
4688 write_reg(info
, TXDMA
+ CPB
,
4689 (unsigned char)(info
->buffer_list_phys
>> 16));
4691 /* enable status interrupts. other code enables/disables
4692 * the individual sources for these two interrupt classes.
4694 info
->ie0_value
|= TXINTE
+ RXINTE
;
4695 write_reg(info
, IE0
, info
->ie0_value
);
4697 /* CTL, MSCI control register
4699 * 07..06 Reserved, set to 0
4700 * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC)
4701 * 04 IDLC, idle control, 0=mark 1=idle register
4702 * 03 BRK, break, 0=off 1 =on (async)
4703 * 02 SYNCLD, sync char load enable (BSC) 1=enabled
4704 * 01 GOP, go active on poll (LOOP mode) 1=enabled
4705 * 00 RTS, RTS output control, 0=active 1=inactive
4710 if (!(info
->serial_signals
& SerialSignal_RTS
))
4712 write_reg(info
, CTL
, RegValue
);
4714 /* preamble not supported ! */
4720 set_rate(info
, info
->params
.clock_speed
);
4722 if (info
->params
.loopback
)
4723 enable_loopback(info
,1);
4726 /* Set the transmit HDLC idle mode
4728 static void tx_set_idle(SLMP_INFO
*info
)
4730 unsigned char RegValue
= 0xff;
4732 /* Map API idle mode to SCA register bits */
4733 switch(info
->idle_mode
) {
4734 case HDLC_TXIDLE_FLAGS
: RegValue
= 0x7e; break;
4735 case HDLC_TXIDLE_ALT_ZEROS_ONES
: RegValue
= 0xaa; break;
4736 case HDLC_TXIDLE_ZEROS
: RegValue
= 0x00; break;
4737 case HDLC_TXIDLE_ONES
: RegValue
= 0xff; break;
4738 case HDLC_TXIDLE_ALT_MARK_SPACE
: RegValue
= 0xaa; break;
4739 case HDLC_TXIDLE_SPACE
: RegValue
= 0x00; break;
4740 case HDLC_TXIDLE_MARK
: RegValue
= 0xff; break;
4743 write_reg(info
, IDL
, RegValue
);
4746 /* Query the adapter for the state of the V24 status (input) signals.
4748 static void get_signals(SLMP_INFO
*info
)
4750 u16 status
= read_reg(info
, SR3
);
4751 u16 gpstatus
= read_status_reg(info
);
4754 /* clear all serial signals except RTS and DTR */
4755 info
->serial_signals
&= SerialSignal_RTS
| SerialSignal_DTR
;
4757 /* set serial signal bits to reflect MISR */
4759 if (!(status
& BIT3
))
4760 info
->serial_signals
|= SerialSignal_CTS
;
4762 if ( !(status
& BIT2
))
4763 info
->serial_signals
|= SerialSignal_DCD
;
4765 testbit
= BIT1
<< (info
->port_num
* 2); // Port 0..3 RI is GPDATA<1,3,5,7>
4766 if (!(gpstatus
& testbit
))
4767 info
->serial_signals
|= SerialSignal_RI
;
4769 testbit
= BIT0
<< (info
->port_num
* 2); // Port 0..3 DSR is GPDATA<0,2,4,6>
4770 if (!(gpstatus
& testbit
))
4771 info
->serial_signals
|= SerialSignal_DSR
;
4774 /* Set the state of RTS and DTR based on contents of
4775 * serial_signals member of device context.
4777 static void set_signals(SLMP_INFO
*info
)
4779 unsigned char RegValue
;
4782 RegValue
= read_reg(info
, CTL
);
4783 if (info
->serial_signals
& SerialSignal_RTS
)
4787 write_reg(info
, CTL
, RegValue
);
4789 // Port 0..3 DTR is ctrl reg <1,3,5,7>
4790 EnableBit
= BIT1
<< (info
->port_num
*2);
4791 if (info
->serial_signals
& SerialSignal_DTR
)
4792 info
->port_array
[0]->ctrlreg_value
&= ~EnableBit
;
4794 info
->port_array
[0]->ctrlreg_value
|= EnableBit
;
4795 write_control_reg(info
);
4798 /*******************/
4799 /* DMA Buffer Code */
4800 /*******************/
4802 /* Set the count for all receive buffers to SCABUFSIZE
4803 * and set the current buffer to the first buffer. This effectively
4804 * makes all buffers free and discards any data in buffers.
4806 static void rx_reset_buffers(SLMP_INFO
*info
)
4808 rx_free_frame_buffers(info
, 0, info
->rx_buf_count
- 1);
4811 /* Free the buffers used by a received frame
4813 * info pointer to device instance data
4814 * first index of 1st receive buffer of frame
4815 * last index of last receive buffer of frame
4817 static void rx_free_frame_buffers(SLMP_INFO
*info
, unsigned int first
, unsigned int last
)
4822 /* reset current buffer for reuse */
4823 info
->rx_buf_list
[first
].status
= 0xff;
4825 if (first
== last
) {
4827 /* set new last rx descriptor address */
4828 write_reg16(info
, RXDMA
+ EDA
, info
->rx_buf_list_ex
[first
].phys_entry
);
4832 if (first
== info
->rx_buf_count
)
4836 /* set current buffer to next buffer after last buffer of frame */
4837 info
->current_rx_buf
= first
;
4840 /* Return a received frame from the receive DMA buffers.
4841 * Only frames received without errors are returned.
4843 * Return Value: true if frame returned, otherwise false
4845 static bool rx_get_frame(SLMP_INFO
*info
)
4847 unsigned int StartIndex
, EndIndex
; /* index of 1st and last buffers of Rx frame */
4848 unsigned short status
;
4849 unsigned int framesize
= 0;
4850 bool ReturnCode
= false;
4851 unsigned long flags
;
4852 struct tty_struct
*tty
= info
->port
.tty
;
4853 unsigned char addr_field
= 0xff;
4855 SCADESC_EX
*desc_ex
;
4858 /* assume no frame returned, set zero length */
4863 * current_rx_buf points to the 1st buffer of the next available
4864 * receive frame. To find the last buffer of the frame look for
4865 * a non-zero status field in the buffer entries. (The status
4866 * field is set by the 16C32 after completing a receive frame.
4868 StartIndex
= EndIndex
= info
->current_rx_buf
;
4871 desc
= &info
->rx_buf_list
[EndIndex
];
4872 desc_ex
= &info
->rx_buf_list_ex
[EndIndex
];
4874 if (desc
->status
== 0xff)
4875 goto Cleanup
; /* current desc still in use, no frames available */
4877 if (framesize
== 0 && info
->params
.addr_filter
!= 0xff)
4878 addr_field
= desc_ex
->virt_addr
[0];
4880 framesize
+= desc
->length
;
4882 /* Status != 0 means last buffer of frame */
4887 if (EndIndex
== info
->rx_buf_count
)
4890 if (EndIndex
== info
->current_rx_buf
) {
4891 /* all buffers have been 'used' but none mark */
4892 /* the end of a frame. Reset buffers and receiver. */
4893 if ( info
->rx_enabled
){
4894 spin_lock_irqsave(&info
->lock
,flags
);
4896 spin_unlock_irqrestore(&info
->lock
,flags
);
4903 /* check status of receive frame */
4905 /* frame status is byte stored after frame data
4907 * 7 EOM (end of msg), 1 = last buffer of frame
4908 * 6 Short Frame, 1 = short frame
4909 * 5 Abort, 1 = frame aborted
4910 * 4 Residue, 1 = last byte is partial
4911 * 3 Overrun, 1 = overrun occurred during frame reception
4912 * 2 CRC, 1 = CRC error detected
4915 status
= desc
->status
;
4917 /* ignore CRC bit if not using CRC (bit is undefined) */
4918 /* Note:CRC is not save to data buffer */
4919 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
4922 if (framesize
== 0 ||
4923 (addr_field
!= 0xff && addr_field
!= info
->params
.addr_filter
)) {
4924 /* discard 0 byte frames, this seems to occur sometime
4925 * when remote is idling flags.
4927 rx_free_frame_buffers(info
, StartIndex
, EndIndex
);
4934 if (status
& (BIT6
+BIT5
+BIT3
+BIT2
)) {
4935 /* received frame has errors,
4936 * update counts and mark frame size as 0
4939 info
->icount
.rxshort
++;
4940 else if (status
& BIT5
)
4941 info
->icount
.rxabort
++;
4942 else if (status
& BIT3
)
4943 info
->icount
.rxover
++;
4945 info
->icount
.rxcrc
++;
4948 #if SYNCLINK_GENERIC_HDLC
4950 info
->netdev
->stats
.rx_errors
++;
4951 info
->netdev
->stats
.rx_frame_errors
++;
4956 if ( debug_level
>= DEBUG_LEVEL_BH
)
4957 printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n",
4958 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
4960 if ( debug_level
>= DEBUG_LEVEL_DATA
)
4961 trace_block(info
,info
->rx_buf_list_ex
[StartIndex
].virt_addr
,
4962 min_t(unsigned int, framesize
, SCABUFSIZE
), 0);
4965 if (framesize
> info
->max_frame_size
)
4966 info
->icount
.rxlong
++;
4968 /* copy dma buffer(s) to contiguous intermediate buffer */
4969 int copy_count
= framesize
;
4970 int index
= StartIndex
;
4971 unsigned char *ptmp
= info
->tmp_rx_buf
;
4972 info
->tmp_rx_buf_count
= framesize
;
4974 info
->icount
.rxok
++;
4977 int partial_count
= min(copy_count
,SCABUFSIZE
);
4979 info
->rx_buf_list_ex
[index
].virt_addr
,
4981 ptmp
+= partial_count
;
4982 copy_count
-= partial_count
;
4984 if ( ++index
== info
->rx_buf_count
)
4988 #if SYNCLINK_GENERIC_HDLC
4990 hdlcdev_rx(info
,info
->tmp_rx_buf
,framesize
);
4993 ldisc_receive_buf(tty
,info
->tmp_rx_buf
,
4994 info
->flag_buf
, framesize
);
4997 /* Free the buffers used by this frame. */
4998 rx_free_frame_buffers( info
, StartIndex
, EndIndex
);
5003 if ( info
->rx_enabled
&& info
->rx_overflow
) {
5004 /* Receiver is enabled, but needs to restarted due to
5005 * rx buffer overflow. If buffers are empty, restart receiver.
5007 if (info
->rx_buf_list
[EndIndex
].status
== 0xff) {
5008 spin_lock_irqsave(&info
->lock
,flags
);
5010 spin_unlock_irqrestore(&info
->lock
,flags
);
5017 /* load the transmit DMA buffer with data
5019 static void tx_load_dma_buffer(SLMP_INFO
*info
, const char *buf
, unsigned int count
)
5021 unsigned short copy_count
;
5024 SCADESC_EX
*desc_ex
;
5026 if ( debug_level
>= DEBUG_LEVEL_DATA
)
5027 trace_block(info
, buf
, min_t(unsigned int, count
, SCABUFSIZE
), 1);
5029 /* Copy source buffer to one or more DMA buffers, starting with
5030 * the first transmit dma buffer.
5034 copy_count
= min_t(unsigned int, count
, SCABUFSIZE
);
5036 desc
= &info
->tx_buf_list
[i
];
5037 desc_ex
= &info
->tx_buf_list_ex
[i
];
5039 load_pci_memory(info
, desc_ex
->virt_addr
,buf
,copy_count
);
5041 desc
->length
= copy_count
;
5045 count
-= copy_count
;
5051 if (i
>= info
->tx_buf_count
)
5055 info
->tx_buf_list
[i
].status
= 0x81; /* set EOM and EOT status */
5056 info
->last_tx_buf
= ++i
;
5059 static bool register_test(SLMP_INFO
*info
)
5061 static unsigned char testval
[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96};
5062 static unsigned int count
= ARRAY_SIZE(testval
);
5065 unsigned long flags
;
5067 spin_lock_irqsave(&info
->lock
,flags
);
5070 /* assume failure */
5071 info
->init_error
= DiagStatus_AddressFailure
;
5073 /* Write bit patterns to various registers but do it out of */
5074 /* sync, then read back and verify values. */
5076 for (i
= 0 ; i
< count
; i
++) {
5077 write_reg(info
, TMC
, testval
[i
]);
5078 write_reg(info
, IDL
, testval
[(i
+1)%count
]);
5079 write_reg(info
, SA0
, testval
[(i
+2)%count
]);
5080 write_reg(info
, SA1
, testval
[(i
+3)%count
]);
5082 if ( (read_reg(info
, TMC
) != testval
[i
]) ||
5083 (read_reg(info
, IDL
) != testval
[(i
+1)%count
]) ||
5084 (read_reg(info
, SA0
) != testval
[(i
+2)%count
]) ||
5085 (read_reg(info
, SA1
) != testval
[(i
+3)%count
]) )
5093 spin_unlock_irqrestore(&info
->lock
,flags
);
5098 static bool irq_test(SLMP_INFO
*info
)
5100 unsigned long timeout
;
5101 unsigned long flags
;
5103 unsigned char timer
= (info
->port_num
& 1) ? TIMER2
: TIMER0
;
5105 spin_lock_irqsave(&info
->lock
,flags
);
5108 /* assume failure */
5109 info
->init_error
= DiagStatus_IrqFailure
;
5110 info
->irq_occurred
= false;
5112 /* setup timer0 on SCA0 to interrupt */
5114 /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */
5115 write_reg(info
, IER2
, (unsigned char)((info
->port_num
& 1) ? BIT6
: BIT4
));
5117 write_reg(info
, (unsigned char)(timer
+ TEPR
), 0); /* timer expand prescale */
5118 write_reg16(info
, (unsigned char)(timer
+ TCONR
), 1); /* timer constant */
5121 /* TMCS, Timer Control/Status Register
5123 * 07 CMF, Compare match flag (read only) 1=match
5124 * 06 ECMI, CMF Interrupt Enable: 1=enabled
5125 * 05 Reserved, must be 0
5126 * 04 TME, Timer Enable
5127 * 03..00 Reserved, must be 0
5131 write_reg(info
, (unsigned char)(timer
+ TMCS
), 0x50);
5133 spin_unlock_irqrestore(&info
->lock
,flags
);
5136 while( timeout
-- && !info
->irq_occurred
) {
5137 msleep_interruptible(10);
5140 spin_lock_irqsave(&info
->lock
,flags
);
5142 spin_unlock_irqrestore(&info
->lock
,flags
);
5144 return info
->irq_occurred
;
5147 /* initialize individual SCA device (2 ports)
5149 static bool sca_init(SLMP_INFO
*info
)
5151 /* set wait controller to single mem partition (low), no wait states */
5152 write_reg(info
, PABR0
, 0); /* wait controller addr boundary 0 */
5153 write_reg(info
, PABR1
, 0); /* wait controller addr boundary 1 */
5154 write_reg(info
, WCRL
, 0); /* wait controller low range */
5155 write_reg(info
, WCRM
, 0); /* wait controller mid range */
5156 write_reg(info
, WCRH
, 0); /* wait controller high range */
5158 /* DPCR, DMA Priority Control
5160 * 07..05 Not used, must be 0
5161 * 04 BRC, bus release condition: 0=all transfers complete
5162 * 03 CCC, channel change condition: 0=every cycle
5163 * 02..00 PR<2..0>, priority 100=round robin
5167 write_reg(info
, DPCR
, dma_priority
);
5169 /* DMA Master Enable, BIT7: 1=enable all channels */
5170 write_reg(info
, DMER
, 0x80);
5172 /* enable all interrupt classes */
5173 write_reg(info
, IER0
, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */
5174 write_reg(info
, IER1
, 0xff); /* DMIB,DMIA (channels 0-3) */
5175 write_reg(info
, IER2
, 0xf0); /* TIRQ (timers 0-3) */
5177 /* ITCR, interrupt control register
5178 * 07 IPC, interrupt priority, 0=MSCI->DMA
5179 * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle
5180 * 04 VOS, Vector Output, 0=unmodified vector
5181 * 03..00 Reserved, must be 0
5183 write_reg(info
, ITCR
, 0);
5188 /* initialize adapter hardware
5190 static bool init_adapter(SLMP_INFO
*info
)
5194 /* Set BIT30 of Local Control Reg 0x50 to reset SCA */
5195 volatile u32
*MiscCtrl
= (u32
*)(info
->lcr_base
+ 0x50);
5198 info
->misc_ctrl_value
|= BIT30
;
5199 *MiscCtrl
= info
->misc_ctrl_value
;
5202 * Force at least 170ns delay before clearing
5203 * reset bit. Each read from LCR takes at least
5204 * 30ns so 10 times for 300ns to be safe.
5207 readval
= *MiscCtrl
;
5209 info
->misc_ctrl_value
&= ~BIT30
;
5210 *MiscCtrl
= info
->misc_ctrl_value
;
5212 /* init control reg (all DTRs off, all clksel=input) */
5213 info
->ctrlreg_value
= 0xaa;
5214 write_control_reg(info
);
5217 volatile u32
*LCR1BRDR
= (u32
*)(info
->lcr_base
+ 0x2c);
5218 lcr1_brdr_value
&= ~(BIT5
+ BIT4
+ BIT3
);
5220 switch(read_ahead_count
)
5223 lcr1_brdr_value
|= BIT5
+ BIT4
+ BIT3
;
5226 lcr1_brdr_value
|= BIT5
+ BIT4
;
5229 lcr1_brdr_value
|= BIT5
+ BIT3
;
5232 lcr1_brdr_value
|= BIT5
;
5236 *LCR1BRDR
= lcr1_brdr_value
;
5237 *MiscCtrl
= misc_ctrl_value
;
5240 sca_init(info
->port_array
[0]);
5241 sca_init(info
->port_array
[2]);
5246 /* Loopback an HDLC frame to test the hardware
5247 * interrupt and DMA functions.
5249 static bool loopback_test(SLMP_INFO
*info
)
5251 #define TESTFRAMESIZE 20
5253 unsigned long timeout
;
5254 u16 count
= TESTFRAMESIZE
;
5255 unsigned char buf
[TESTFRAMESIZE
];
5257 unsigned long flags
;
5259 struct tty_struct
*oldtty
= info
->port
.tty
;
5260 u32 speed
= info
->params
.clock_speed
;
5262 info
->params
.clock_speed
= 3686400;
5263 info
->port
.tty
= NULL
;
5265 /* assume failure */
5266 info
->init_error
= DiagStatus_DmaFailure
;
5268 /* build and send transmit frame */
5269 for (count
= 0; count
< TESTFRAMESIZE
;++count
)
5270 buf
[count
] = (unsigned char)count
;
5272 memset(info
->tmp_rx_buf
,0,TESTFRAMESIZE
);
5274 /* program hardware for HDLC and enabled receiver */
5275 spin_lock_irqsave(&info
->lock
,flags
);
5277 enable_loopback(info
,1);
5279 info
->tx_count
= count
;
5280 tx_load_dma_buffer(info
,buf
,count
);
5282 spin_unlock_irqrestore(&info
->lock
,flags
);
5284 /* wait for receive complete */
5285 /* Set a timeout for waiting for interrupt. */
5286 for ( timeout
= 100; timeout
; --timeout
) {
5287 msleep_interruptible(10);
5289 if (rx_get_frame(info
)) {
5295 /* verify received frame length and contents */
5297 ( info
->tmp_rx_buf_count
!= count
||
5298 memcmp(buf
, info
->tmp_rx_buf
,count
))) {
5302 spin_lock_irqsave(&info
->lock
,flags
);
5303 reset_adapter(info
);
5304 spin_unlock_irqrestore(&info
->lock
,flags
);
5306 info
->params
.clock_speed
= speed
;
5307 info
->port
.tty
= oldtty
;
5312 /* Perform diagnostics on hardware
5314 static int adapter_test( SLMP_INFO
*info
)
5316 unsigned long flags
;
5317 if ( debug_level
>= DEBUG_LEVEL_INFO
)
5318 printk( "%s(%d):Testing device %s\n",
5319 __FILE__
,__LINE__
,info
->device_name
);
5321 spin_lock_irqsave(&info
->lock
,flags
);
5323 spin_unlock_irqrestore(&info
->lock
,flags
);
5325 info
->port_array
[0]->port_count
= 0;
5327 if ( register_test(info
->port_array
[0]) &&
5328 register_test(info
->port_array
[1])) {
5330 info
->port_array
[0]->port_count
= 2;
5332 if ( register_test(info
->port_array
[2]) &&
5333 register_test(info
->port_array
[3]) )
5334 info
->port_array
[0]->port_count
+= 2;
5337 printk( "%s(%d):Register test failure for device %s Addr=%08lX\n",
5338 __FILE__
,__LINE__
,info
->device_name
, (unsigned long)(info
->phys_sca_base
));
5342 if ( !irq_test(info
->port_array
[0]) ||
5343 !irq_test(info
->port_array
[1]) ||
5344 (info
->port_count
== 4 && !irq_test(info
->port_array
[2])) ||
5345 (info
->port_count
== 4 && !irq_test(info
->port_array
[3]))) {
5346 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
5347 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
5351 if (!loopback_test(info
->port_array
[0]) ||
5352 !loopback_test(info
->port_array
[1]) ||
5353 (info
->port_count
== 4 && !loopback_test(info
->port_array
[2])) ||
5354 (info
->port_count
== 4 && !loopback_test(info
->port_array
[3]))) {
5355 printk( "%s(%d):DMA test failure for device %s\n",
5356 __FILE__
,__LINE__
,info
->device_name
);
5360 if ( debug_level
>= DEBUG_LEVEL_INFO
)
5361 printk( "%s(%d):device %s passed diagnostics\n",
5362 __FILE__
,__LINE__
,info
->device_name
);
5364 info
->port_array
[0]->init_error
= 0;
5365 info
->port_array
[1]->init_error
= 0;
5366 if ( info
->port_count
> 2 ) {
5367 info
->port_array
[2]->init_error
= 0;
5368 info
->port_array
[3]->init_error
= 0;
5374 /* Test the shared memory on a PCI adapter.
5376 static bool memory_test(SLMP_INFO
*info
)
5378 static unsigned long testval
[] = { 0x0, 0x55555555, 0xaaaaaaaa,
5379 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
5380 unsigned long count
= ARRAY_SIZE(testval
);
5382 unsigned long limit
= SCA_MEM_SIZE
/sizeof(unsigned long);
5383 unsigned long * addr
= (unsigned long *)info
->memory_base
;
5385 /* Test data lines with test pattern at one location. */
5387 for ( i
= 0 ; i
< count
; i
++ ) {
5389 if ( *addr
!= testval
[i
] )
5393 /* Test address lines with incrementing pattern over */
5394 /* entire address range. */
5396 for ( i
= 0 ; i
< limit
; i
++ ) {
5401 addr
= (unsigned long *)info
->memory_base
;
5403 for ( i
= 0 ; i
< limit
; i
++ ) {
5404 if ( *addr
!= i
* 4 )
5409 memset( info
->memory_base
, 0, SCA_MEM_SIZE
);
5413 /* Load data into PCI adapter shared memory.
5415 * The PCI9050 releases control of the local bus
5416 * after completing the current read or write operation.
5418 * While the PCI9050 write FIFO not empty, the
5419 * PCI9050 treats all of the writes as a single transaction
5420 * and does not release the bus. This causes DMA latency problems
5421 * at high speeds when copying large data blocks to the shared memory.
5423 * This function breaks a write into multiple transations by
5424 * interleaving a read which flushes the write FIFO and 'completes'
5425 * the write transation. This allows any pending DMA request to gain control
5426 * of the local bus in a timely fasion.
5428 static void load_pci_memory(SLMP_INFO
*info
, char* dest
, const char* src
, unsigned short count
)
5430 /* A load interval of 16 allows for 4 32-bit writes at */
5431 /* 136ns each for a maximum latency of 542ns on the local bus.*/
5433 unsigned short interval
= count
/ sca_pci_load_interval
;
5436 for ( i
= 0 ; i
< interval
; i
++ )
5438 memcpy(dest
, src
, sca_pci_load_interval
);
5439 read_status_reg(info
);
5440 dest
+= sca_pci_load_interval
;
5441 src
+= sca_pci_load_interval
;
5444 memcpy(dest
, src
, count
% sca_pci_load_interval
);
5447 static void trace_block(SLMP_INFO
*info
,const char* data
, int count
, int xmit
)
5452 printk("%s tx data:\n",info
->device_name
);
5454 printk("%s rx data:\n",info
->device_name
);
5462 for(i
=0;i
<linecount
;i
++)
5463 printk("%02X ",(unsigned char)data
[i
]);
5466 for(i
=0;i
<linecount
;i
++) {
5467 if (data
[i
]>=040 && data
[i
]<=0176)
5468 printk("%c",data
[i
]);
5477 } /* end of trace_block() */
5479 /* called when HDLC frame times out
5480 * update stats and do tx completion processing
5482 static void tx_timeout(unsigned long context
)
5484 SLMP_INFO
*info
= (SLMP_INFO
*)context
;
5485 unsigned long flags
;
5487 if ( debug_level
>= DEBUG_LEVEL_INFO
)
5488 printk( "%s(%d):%s tx_timeout()\n",
5489 __FILE__
,__LINE__
,info
->device_name
);
5490 if(info
->tx_active
&& info
->params
.mode
== MGSL_MODE_HDLC
) {
5491 info
->icount
.txtimeout
++;
5493 spin_lock_irqsave(&info
->lock
,flags
);
5494 info
->tx_active
= false;
5495 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
5497 spin_unlock_irqrestore(&info
->lock
,flags
);
5499 #if SYNCLINK_GENERIC_HDLC
5501 hdlcdev_tx_done(info
);
5507 /* called to periodically check the DSR/RI modem signal input status
5509 static void status_timeout(unsigned long context
)
5512 SLMP_INFO
*info
= (SLMP_INFO
*)context
;
5513 unsigned long flags
;
5514 unsigned char delta
;
5517 spin_lock_irqsave(&info
->lock
,flags
);
5519 spin_unlock_irqrestore(&info
->lock
,flags
);
5521 /* check for DSR/RI state change */
5523 delta
= info
->old_signals
^ info
->serial_signals
;
5524 info
->old_signals
= info
->serial_signals
;
5526 if (delta
& SerialSignal_DSR
)
5527 status
|= MISCSTATUS_DSR_LATCHED
|(info
->serial_signals
&SerialSignal_DSR
);
5529 if (delta
& SerialSignal_RI
)
5530 status
|= MISCSTATUS_RI_LATCHED
|(info
->serial_signals
&SerialSignal_RI
);
5532 if (delta
& SerialSignal_DCD
)
5533 status
|= MISCSTATUS_DCD_LATCHED
|(info
->serial_signals
&SerialSignal_DCD
);
5535 if (delta
& SerialSignal_CTS
)
5536 status
|= MISCSTATUS_CTS_LATCHED
|(info
->serial_signals
&SerialSignal_CTS
);
5539 isr_io_pin(info
,status
);
5541 mod_timer(&info
->status_timer
, jiffies
+ msecs_to_jiffies(10));
5545 /* Register Access Routines -
5546 * All registers are memory mapped
5548 #define CALC_REGADDR() \
5549 unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \
5550 if (info->port_num > 1) \
5551 RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \
5552 if ( info->port_num & 1) { \
5554 RegAddr += 0x40; /* DMA access */ \
5555 else if (Addr > 0x1f && Addr < 0x60) \
5556 RegAddr += 0x20; /* MSCI access */ \
5560 static unsigned char read_reg(SLMP_INFO
* info
, unsigned char Addr
)
5565 static void write_reg(SLMP_INFO
* info
, unsigned char Addr
, unsigned char Value
)
5571 static u16
read_reg16(SLMP_INFO
* info
, unsigned char Addr
)
5574 return *((u16
*)RegAddr
);
5577 static void write_reg16(SLMP_INFO
* info
, unsigned char Addr
, u16 Value
)
5580 *((u16
*)RegAddr
) = Value
;
5583 static unsigned char read_status_reg(SLMP_INFO
* info
)
5585 unsigned char *RegAddr
= (unsigned char *)info
->statctrl_base
;
5589 static void write_control_reg(SLMP_INFO
* info
)
5591 unsigned char *RegAddr
= (unsigned char *)info
->statctrl_base
;
5592 *RegAddr
= info
->port_array
[0]->ctrlreg_value
;
5596 static int synclinkmp_init_one (struct pci_dev
*dev
,
5597 const struct pci_device_id
*ent
)
5599 if (pci_enable_device(dev
)) {
5600 printk("error enabling pci device %p\n", dev
);
5603 device_init( ++synclinkmp_adapter_count
, dev
);
5607 static void synclinkmp_remove_one (struct pci_dev
*dev
)