2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
6 * Device driver for Microgate SyncLink PC Card
7 * multiprotocol serial adapter.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * This code is released under the GNU General Public License (GPL)
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
31 # define BREAKPOINT() asm(" int $3");
33 # define BREAKPOINT() { }
36 #define MAX_DEVICE_COUNT 4
38 #include <linux/module.h>
39 #include <linux/errno.h>
40 #include <linux/signal.h>
41 #include <linux/sched.h>
42 #include <linux/timer.h>
43 #include <linux/time.h>
44 #include <linux/interrupt.h>
45 #include <linux/tty.h>
46 #include <linux/tty_flip.h>
47 #include <linux/serial.h>
48 #include <linux/major.h>
49 #include <linux/string.h>
50 #include <linux/fcntl.h>
51 #include <linux/ptrace.h>
52 #include <linux/ioport.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>
60 #include <linux/synclink.h>
62 #include <asm/system.h>
66 #include <linux/bitops.h>
67 #include <asm/types.h>
68 #include <linux/termios.h>
69 #include <linux/workqueue.h>
70 #include <linux/hdlc.h>
72 #include <pcmcia/cs_types.h>
73 #include <pcmcia/cs.h>
74 #include <pcmcia/cistpl.h>
75 #include <pcmcia/cisreg.h>
76 #include <pcmcia/ds.h>
78 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE))
79 #define SYNCLINK_GENERIC_HDLC 1
81 #define SYNCLINK_GENERIC_HDLC 0
84 #define GET_USER(error,value,addr) error = get_user(value,addr)
85 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
86 #define PUT_USER(error,value,addr) error = put_user(value,addr)
87 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
89 #include <asm/uaccess.h>
91 static MGSL_PARAMS default_params
= {
92 MGSL_MODE_HDLC
, /* unsigned long mode */
93 0, /* unsigned char loopback; */
94 HDLC_FLAG_UNDERRUN_ABORT15
, /* unsigned short flags; */
95 HDLC_ENCODING_NRZI_SPACE
, /* unsigned char encoding; */
96 0, /* unsigned long clock_speed; */
97 0xff, /* unsigned char addr_filter; */
98 HDLC_CRC_16_CCITT
, /* unsigned short crc_type; */
99 HDLC_PREAMBLE_LENGTH_8BITS
, /* unsigned char preamble_length; */
100 HDLC_PREAMBLE_PATTERN_NONE
, /* unsigned char preamble; */
101 9600, /* unsigned long data_rate; */
102 8, /* unsigned char data_bits; */
103 1, /* unsigned char stop_bits; */
104 ASYNC_PARITY_NONE
/* unsigned char parity; */
110 unsigned char status
;
114 /* The queue of BH actions to be performed */
117 #define BH_TRANSMIT 2
120 #define IO_PIN_SHUTDOWN_LIMIT 100
122 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
124 struct _input_signal_events
{
137 * Device instance data structure
140 typedef struct _mgslpc_info
{
141 void *if_ptr
; /* General purpose pointer (used by SPPP) */
144 int count
; /* count of opens */
146 unsigned short close_delay
;
147 unsigned short closing_wait
; /* time to wait before closing */
149 struct mgsl_icount icount
;
151 struct tty_struct
*tty
;
153 int x_char
; /* xon/xoff character */
154 int blocked_open
; /* # of blocked opens */
155 unsigned char read_status_mask
;
156 unsigned char ignore_status_mask
;
158 unsigned char *tx_buf
;
163 /* circular list of fixed length rx buffers */
165 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
166 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
167 int rx_put
; /* index of next empty rx buffer */
168 int rx_get
; /* index of next full rx buffer */
169 int rx_buf_size
; /* size in bytes of single rx buffer */
170 int rx_buf_count
; /* total number of rx buffers */
171 int rx_frame_count
; /* number of full rx buffers */
173 wait_queue_head_t open_wait
;
174 wait_queue_head_t close_wait
;
176 wait_queue_head_t status_event_wait_q
;
177 wait_queue_head_t event_wait_q
;
178 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
179 struct _mgslpc_info
*next_device
; /* device list link */
181 unsigned short imra_value
;
182 unsigned short imrb_value
;
183 unsigned char pim_value
;
186 struct work_struct task
; /* task structure for scheduling bh */
195 int dcd_chkcount
; /* check counts to prevent */
196 int cts_chkcount
; /* too many IRQs if a signal */
197 int dsr_chkcount
; /* is floating */
208 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
210 char device_name
[25]; /* device instance name */
212 unsigned int io_base
; /* base I/O address of adapter */
213 unsigned int irq_level
;
215 MGSL_PARAMS params
; /* communications parameters */
217 unsigned char serial_signals
; /* current serial signal states */
219 bool irq_occurred
; /* for diagnostics use */
221 unsigned int init_error
; /* startup error (DIAGS) */
223 char flag_buf
[MAX_ASYNC_BUFFER_SIZE
];
224 bool drop_rts_on_tx_done
;
226 struct _input_signal_events input_signal_events
;
229 struct pcmcia_device
*p_dev
;
233 /* SPPP/Cisco HDLC device parts */
238 #if SYNCLINK_GENERIC_HDLC
239 struct net_device
*netdev
;
244 #define MGSLPC_MAGIC 0x5402
247 * The size of the serial xmit buffer is 1 page, or 4096 bytes
249 #define TXBUFSIZE 4096
252 #define CHA 0x00 /* channel A offset */
253 #define CHB 0x40 /* channel B offset */
256 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
303 #define IRQ_BREAK_ON BIT15 // rx break detected
304 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
305 #define IRQ_ALLSENT BIT13 // all sent
306 #define IRQ_UNDERRUN BIT12 // transmit data underrun
307 #define IRQ_TIMER BIT11 // timer interrupt
308 #define IRQ_CTS BIT10 // CTS status change
309 #define IRQ_TXREPEAT BIT9 // tx message repeat
310 #define IRQ_TXFIFO BIT8 // transmit pool ready
311 #define IRQ_RXEOM BIT7 // receive message end
312 #define IRQ_EXITHUNT BIT6 // receive frame start
313 #define IRQ_RXTIME BIT6 // rx char timeout
314 #define IRQ_DCD BIT2 // carrier detect status change
315 #define IRQ_OVERRUN BIT1 // receive frame overflow
316 #define IRQ_RXFIFO BIT0 // receive pool full
320 #define XFW BIT6 // transmit FIFO write enable
321 #define CEC BIT2 // command executing
322 #define CTS BIT1 // CTS state
327 #define PVR_AUTOCTS BIT3
328 #define PVR_RS232 0x20 /* 0010b */
329 #define PVR_V35 0xe0 /* 1110b */
330 #define PVR_RS422 0x40 /* 0100b */
332 /* Register access functions */
334 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
335 #define read_reg(info, reg) inb((info)->io_base + (reg))
337 #define read_reg16(info, reg) inw((info)->io_base + (reg))
338 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
340 #define set_reg_bits(info, reg, mask) \
341 write_reg(info, (reg), \
342 (unsigned char) (read_reg(info, (reg)) | (mask)))
343 #define clear_reg_bits(info, reg, mask) \
344 write_reg(info, (reg), \
345 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
347 * interrupt enable/disable routines
349 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
351 if (channel
== CHA
) {
352 info
->imra_value
|= mask
;
353 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
355 info
->imrb_value
|= mask
;
356 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
359 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
361 if (channel
== CHA
) {
362 info
->imra_value
&= ~mask
;
363 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
365 info
->imrb_value
&= ~mask
;
366 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
370 #define port_irq_disable(info, mask) \
371 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
373 #define port_irq_enable(info, mask) \
374 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
376 static void rx_start(MGSLPC_INFO
*info
);
377 static void rx_stop(MGSLPC_INFO
*info
);
379 static void tx_start(MGSLPC_INFO
*info
);
380 static void tx_stop(MGSLPC_INFO
*info
);
381 static void tx_set_idle(MGSLPC_INFO
*info
);
383 static void get_signals(MGSLPC_INFO
*info
);
384 static void set_signals(MGSLPC_INFO
*info
);
386 static void reset_device(MGSLPC_INFO
*info
);
388 static void hdlc_mode(MGSLPC_INFO
*info
);
389 static void async_mode(MGSLPC_INFO
*info
);
391 static void tx_timeout(unsigned long context
);
393 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
);
395 #if SYNCLINK_GENERIC_HDLC
396 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
397 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
398 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
399 static int hdlcdev_init(MGSLPC_INFO
*info
);
400 static void hdlcdev_exit(MGSLPC_INFO
*info
);
403 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
405 static bool register_test(MGSLPC_INFO
*info
);
406 static bool irq_test(MGSLPC_INFO
*info
);
407 static int adapter_test(MGSLPC_INFO
*info
);
409 static int claim_resources(MGSLPC_INFO
*info
);
410 static void release_resources(MGSLPC_INFO
*info
);
411 static void mgslpc_add_device(MGSLPC_INFO
*info
);
412 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
414 static bool rx_get_frame(MGSLPC_INFO
*info
);
415 static void rx_reset_buffers(MGSLPC_INFO
*info
);
416 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
417 static void rx_free_buffers(MGSLPC_INFO
*info
);
419 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
);
422 * Bottom half interrupt handlers
424 static void bh_handler(struct work_struct
*work
);
425 static void bh_transmit(MGSLPC_INFO
*info
);
426 static void bh_status(MGSLPC_INFO
*info
);
431 static int tiocmget(struct tty_struct
*tty
, struct file
*file
);
432 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
433 unsigned int set
, unsigned int clear
);
434 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
435 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
436 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
);
437 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
438 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
439 static int set_txenable(MGSLPC_INFO
*info
, int enable
);
440 static int tx_abort(MGSLPC_INFO
*info
);
441 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
442 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
444 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
445 static int mgslpc_device_count
= 0;
448 * Set this param to non-zero to load eax with the
449 * .text section address and breakpoint on module load.
450 * This is useful for use with gdb and add-symbol-file command.
452 static int break_on_load
=0;
455 * Driver major number, defaults to zero to get auto
456 * assigned major number. May be forced as module parameter.
458 static int ttymajor
=0;
460 static int debug_level
= 0;
461 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
462 static int dosyncppp
[MAX_DEVICE_COUNT
] = {1,1,1,1};
464 module_param(break_on_load
, bool, 0);
465 module_param(ttymajor
, int, 0);
466 module_param(debug_level
, int, 0);
467 module_param_array(maxframe
, int, NULL
, 0);
468 module_param_array(dosyncppp
, int, NULL
, 0);
470 MODULE_LICENSE("GPL");
472 static char *driver_name
= "SyncLink PC Card driver";
473 static char *driver_version
= "$Revision: 4.34 $";
475 static struct tty_driver
*serial_driver
;
477 /* number of characters left in xmit buffer before we ask for more */
478 #define WAKEUP_CHARS 256
480 static void mgslpc_change_params(MGSLPC_INFO
*info
);
481 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
483 /* PCMCIA prototypes */
485 static int mgslpc_config(struct pcmcia_device
*link
);
486 static void mgslpc_release(u_long arg
);
487 static void mgslpc_detach(struct pcmcia_device
*p_dev
);
490 * 1st function defined in .text section. Calling this function in
491 * init_module() followed by a breakpoint allows a remote debugger
492 * (gdb) to get the .text address for the add-symbol-file command.
493 * This allows remote debugging of dynamically loadable modules.
495 static void* mgslpc_get_text_ptr(void)
497 return mgslpc_get_text_ptr
;
501 * line discipline callback wrappers
503 * The wrappers maintain line discipline references
504 * while calling into the line discipline.
506 * ldisc_flush_buffer - flush line discipline receive buffers
507 * ldisc_receive_buf - pass receive data to line discipline
510 static void ldisc_flush_buffer(struct tty_struct
*tty
)
512 struct tty_ldisc
*ld
= tty_ldisc_ref(tty
);
514 if (ld
->flush_buffer
)
515 ld
->flush_buffer(tty
);
520 static void ldisc_receive_buf(struct tty_struct
*tty
,
521 const __u8
*data
, char *flags
, int count
)
523 struct tty_ldisc
*ld
;
526 ld
= tty_ldisc_ref(tty
);
529 ld
->receive_buf(tty
, data
, flags
, count
);
534 static int mgslpc_probe(struct pcmcia_device
*link
)
539 if (debug_level
>= DEBUG_LEVEL_INFO
)
540 printk("mgslpc_attach\n");
542 info
= kzalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
544 printk("Error can't allocate device instance data\n");
548 info
->magic
= MGSLPC_MAGIC
;
549 INIT_WORK(&info
->task
, bh_handler
);
550 info
->max_frame_size
= 4096;
551 info
->close_delay
= 5*HZ
/10;
552 info
->closing_wait
= 30*HZ
;
553 init_waitqueue_head(&info
->open_wait
);
554 init_waitqueue_head(&info
->close_wait
);
555 init_waitqueue_head(&info
->status_event_wait_q
);
556 init_waitqueue_head(&info
->event_wait_q
);
557 spin_lock_init(&info
->lock
);
558 spin_lock_init(&info
->netlock
);
559 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
560 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
561 info
->imra_value
= 0xffff;
562 info
->imrb_value
= 0xffff;
563 info
->pim_value
= 0xff;
568 /* Initialize the struct pcmcia_device structure */
570 /* Interrupt setup */
571 link
->irq
.Attributes
= IRQ_TYPE_EXCLUSIVE
;
572 link
->irq
.IRQInfo1
= IRQ_LEVEL_ID
;
573 link
->irq
.Handler
= NULL
;
575 link
->conf
.Attributes
= 0;
576 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
578 ret
= mgslpc_config(link
);
582 mgslpc_add_device(info
);
587 /* Card has been inserted.
590 #define CS_CHECK(fn, ret) \
591 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
593 static int mgslpc_config(struct pcmcia_device
*link
)
595 MGSLPC_INFO
*info
= link
->priv
;
598 int last_fn
, last_ret
;
600 cistpl_cftable_entry_t dflt
= { 0 };
601 cistpl_cftable_entry_t
*cfg
;
603 if (debug_level
>= DEBUG_LEVEL_INFO
)
604 printk("mgslpc_config(0x%p)\n", link
);
606 tuple
.Attributes
= 0;
607 tuple
.TupleData
= buf
;
608 tuple
.TupleDataMax
= sizeof(buf
);
609 tuple
.TupleOffset
= 0;
611 /* get CIS configuration entry */
613 tuple
.DesiredTuple
= CISTPL_CFTABLE_ENTRY
;
614 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(link
, &tuple
));
616 cfg
= &(parse
.cftable_entry
);
617 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(link
, &tuple
));
618 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(link
, &tuple
, &parse
));
620 if (cfg
->flags
& CISTPL_CFTABLE_DEFAULT
) dflt
= *cfg
;
624 link
->conf
.ConfigIndex
= cfg
->index
;
625 link
->conf
.Attributes
|= CONF_ENABLE_IRQ
;
627 /* IO window settings */
628 link
->io
.NumPorts1
= 0;
629 if ((cfg
->io
.nwin
> 0) || (dflt
.io
.nwin
> 0)) {
630 cistpl_io_t
*io
= (cfg
->io
.nwin
) ? &cfg
->io
: &dflt
.io
;
631 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_AUTO
;
632 if (!(io
->flags
& CISTPL_IO_8BIT
))
633 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_16
;
634 if (!(io
->flags
& CISTPL_IO_16BIT
))
635 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_8
;
636 link
->io
.IOAddrLines
= io
->flags
& CISTPL_IO_LINES_MASK
;
637 link
->io
.BasePort1
= io
->win
[0].base
;
638 link
->io
.NumPorts1
= io
->win
[0].len
;
639 CS_CHECK(RequestIO
, pcmcia_request_io(link
, &link
->io
));
642 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
643 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
644 link
->conf
.ConfigIndex
= 8;
645 link
->conf
.Present
= PRESENT_OPTION
;
647 link
->irq
.Attributes
|= IRQ_HANDLE_PRESENT
;
648 link
->irq
.Handler
= mgslpc_isr
;
649 link
->irq
.Instance
= info
;
650 CS_CHECK(RequestIRQ
, pcmcia_request_irq(link
, &link
->irq
));
652 CS_CHECK(RequestConfiguration
, pcmcia_request_configuration(link
, &link
->conf
));
654 info
->io_base
= link
->io
.BasePort1
;
655 info
->irq_level
= link
->irq
.AssignedIRQ
;
657 /* add to linked list of devices */
658 sprintf(info
->node
.dev_name
, "mgslpc0");
659 info
->node
.major
= info
->node
.minor
= 0;
660 link
->dev_node
= &info
->node
;
662 printk(KERN_INFO
"%s: index 0x%02x:",
663 info
->node
.dev_name
, link
->conf
.ConfigIndex
);
664 if (link
->conf
.Attributes
& CONF_ENABLE_IRQ
)
665 printk(", irq %d", link
->irq
.AssignedIRQ
);
666 if (link
->io
.NumPorts1
)
667 printk(", io 0x%04x-0x%04x", link
->io
.BasePort1
,
668 link
->io
.BasePort1
+link
->io
.NumPorts1
-1);
673 cs_error(link
, last_fn
, last_ret
);
674 mgslpc_release((u_long
)link
);
678 /* Card has been removed.
679 * Unregister device and release PCMCIA configuration.
680 * If device is open, postpone until it is closed.
682 static void mgslpc_release(u_long arg
)
684 struct pcmcia_device
*link
= (struct pcmcia_device
*)arg
;
686 if (debug_level
>= DEBUG_LEVEL_INFO
)
687 printk("mgslpc_release(0x%p)\n", link
);
689 pcmcia_disable_device(link
);
692 static void mgslpc_detach(struct pcmcia_device
*link
)
694 if (debug_level
>= DEBUG_LEVEL_INFO
)
695 printk("mgslpc_detach(0x%p)\n", link
);
697 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
698 mgslpc_release((u_long
)link
);
700 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
703 static int mgslpc_suspend(struct pcmcia_device
*link
)
705 MGSLPC_INFO
*info
= link
->priv
;
712 static int mgslpc_resume(struct pcmcia_device
*link
)
714 MGSLPC_INFO
*info
= link
->priv
;
722 static inline bool mgslpc_paranoia_check(MGSLPC_INFO
*info
,
723 char *name
, const char *routine
)
725 #ifdef MGSLPC_PARANOIA_CHECK
726 static const char *badmagic
=
727 "Warning: bad magic number for mgsl struct (%s) in %s\n";
728 static const char *badinfo
=
729 "Warning: null mgslpc_info for (%s) in %s\n";
732 printk(badinfo
, name
, routine
);
735 if (info
->magic
!= MGSLPC_MAGIC
) {
736 printk(badmagic
, name
, routine
);
747 #define CMD_RXFIFO BIT7 // release current rx FIFO
748 #define CMD_RXRESET BIT6 // receiver reset
749 #define CMD_RXFIFO_READ BIT5
750 #define CMD_START_TIMER BIT4
751 #define CMD_TXFIFO BIT3 // release current tx FIFO
752 #define CMD_TXEOM BIT1 // transmit end message
753 #define CMD_TXRESET BIT0 // transmit reset
755 static bool wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
758 /* wait for command completion */
759 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
767 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
769 wait_command_complete(info
, channel
);
770 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
773 static void tx_pause(struct tty_struct
*tty
)
775 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
778 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
780 if (debug_level
>= DEBUG_LEVEL_INFO
)
781 printk("tx_pause(%s)\n",info
->device_name
);
783 spin_lock_irqsave(&info
->lock
,flags
);
784 if (info
->tx_enabled
)
786 spin_unlock_irqrestore(&info
->lock
,flags
);
789 static void tx_release(struct tty_struct
*tty
)
791 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
794 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
796 if (debug_level
>= DEBUG_LEVEL_INFO
)
797 printk("tx_release(%s)\n",info
->device_name
);
799 spin_lock_irqsave(&info
->lock
,flags
);
800 if (!info
->tx_enabled
)
802 spin_unlock_irqrestore(&info
->lock
,flags
);
805 /* Return next bottom half action to perform.
806 * or 0 if nothing to do.
808 static int bh_action(MGSLPC_INFO
*info
)
813 spin_lock_irqsave(&info
->lock
,flags
);
815 if (info
->pending_bh
& BH_RECEIVE
) {
816 info
->pending_bh
&= ~BH_RECEIVE
;
818 } else if (info
->pending_bh
& BH_TRANSMIT
) {
819 info
->pending_bh
&= ~BH_TRANSMIT
;
821 } else if (info
->pending_bh
& BH_STATUS
) {
822 info
->pending_bh
&= ~BH_STATUS
;
827 /* Mark BH routine as complete */
828 info
->bh_running
= false;
829 info
->bh_requested
= false;
832 spin_unlock_irqrestore(&info
->lock
,flags
);
837 static void bh_handler(struct work_struct
*work
)
839 MGSLPC_INFO
*info
= container_of(work
, MGSLPC_INFO
, task
);
845 if (debug_level
>= DEBUG_LEVEL_BH
)
846 printk( "%s(%d):bh_handler(%s) entry\n",
847 __FILE__
,__LINE__
,info
->device_name
);
849 info
->bh_running
= true;
851 while((action
= bh_action(info
)) != 0) {
853 /* Process work item */
854 if ( debug_level
>= DEBUG_LEVEL_BH
)
855 printk( "%s(%d):bh_handler() work item action=%d\n",
856 __FILE__
,__LINE__
,action
);
861 while(rx_get_frame(info
));
870 /* unknown work item ID */
871 printk("Unknown work item ID=%08X!\n", action
);
876 if (debug_level
>= DEBUG_LEVEL_BH
)
877 printk( "%s(%d):bh_handler(%s) exit\n",
878 __FILE__
,__LINE__
,info
->device_name
);
881 static void bh_transmit(MGSLPC_INFO
*info
)
883 struct tty_struct
*tty
= info
->tty
;
884 if (debug_level
>= DEBUG_LEVEL_BH
)
885 printk("bh_transmit() entry on %s\n", info
->device_name
);
891 static void bh_status(MGSLPC_INFO
*info
)
893 info
->ri_chkcount
= 0;
894 info
->dsr_chkcount
= 0;
895 info
->dcd_chkcount
= 0;
896 info
->cts_chkcount
= 0;
899 /* eom: non-zero = end of frame */
900 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
902 unsigned char data
[2];
903 unsigned char fifo_count
, read_count
, i
;
904 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
906 if (debug_level
>= DEBUG_LEVEL_ISR
)
907 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__
,__LINE__
,eom
);
909 if (!info
->rx_enabled
)
912 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
913 /* no more free buffers */
914 issue_command(info
, CHA
, CMD_RXRESET
);
915 info
->pending_bh
|= BH_RECEIVE
;
916 info
->rx_overflow
= true;
917 info
->icount
.buf_overrun
++;
922 /* end of frame, get FIFO count from RBCL register */
923 if (!(fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f)))
929 if (fifo_count
== 1) {
931 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
934 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
936 fifo_count
-= read_count
;
937 if (!fifo_count
&& eom
)
938 buf
->status
= data
[--read_count
];
940 for (i
= 0; i
< read_count
; i
++) {
941 if (buf
->count
>= info
->max_frame_size
) {
942 /* frame too large, reset receiver and reset current buffer */
943 issue_command(info
, CHA
, CMD_RXRESET
);
947 *(buf
->data
+ buf
->count
) = data
[i
];
950 } while (fifo_count
);
953 info
->pending_bh
|= BH_RECEIVE
;
954 info
->rx_frame_count
++;
956 if (info
->rx_put
>= info
->rx_buf_count
)
959 issue_command(info
, CHA
, CMD_RXFIFO
);
962 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
)
964 unsigned char data
, status
, flag
;
967 struct tty_struct
*tty
= info
->tty
;
968 struct mgsl_icount
*icount
= &info
->icount
;
971 /* early termination, get FIFO count from RBCL register */
972 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
974 /* Zero fifo count could mean 0 or 32 bytes available.
975 * If BIT5 of STAR is set then at least 1 byte is available.
977 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
982 tty_buffer_request_room(tty
, fifo_count
);
983 /* Flush received async data to receive data buffer. */
985 data
= read_reg(info
, CHA
+ RXFIFO
);
986 status
= read_reg(info
, CHA
+ RXFIFO
);
992 // if no frameing/crc error then save data
994 // BIT6:framing error
996 if (status
& (BIT7
+ BIT6
)) {
1002 /* discard char if tty control flags say so */
1003 if (status
& info
->ignore_status_mask
)
1006 status
&= info
->read_status_mask
;
1010 else if (status
& BIT6
)
1013 work
+= tty_insert_flip_char(tty
, data
, flag
);
1015 issue_command(info
, CHA
, CMD_RXFIFO
);
1017 if (debug_level
>= DEBUG_LEVEL_ISR
) {
1018 printk("%s(%d):rx_ready_async",
1020 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1021 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
1022 icount
->parity
,icount
->frame
,icount
->overrun
);
1026 tty_flip_buffer_push(tty
);
1030 static void tx_done(MGSLPC_INFO
*info
)
1032 if (!info
->tx_active
)
1035 info
->tx_active
= false;
1036 info
->tx_aborting
= false;
1038 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
1041 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1042 del_timer(&info
->tx_timer
);
1044 if (info
->drop_rts_on_tx_done
) {
1046 if (info
->serial_signals
& SerialSignal_RTS
) {
1047 info
->serial_signals
&= ~SerialSignal_RTS
;
1050 info
->drop_rts_on_tx_done
= false;
1053 #if SYNCLINK_GENERIC_HDLC
1055 hdlcdev_tx_done(info
);
1059 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1063 info
->pending_bh
|= BH_TRANSMIT
;
1067 static void tx_ready(MGSLPC_INFO
*info
)
1069 unsigned char fifo_count
= 32;
1072 if (debug_level
>= DEBUG_LEVEL_ISR
)
1073 printk("%s(%d):tx_ready(%s)\n", __FILE__
,__LINE__
,info
->device_name
);
1075 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1076 if (!info
->tx_active
)
1079 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1083 if (!info
->tx_count
)
1084 info
->tx_active
= false;
1087 if (!info
->tx_count
)
1090 while (info
->tx_count
&& fifo_count
) {
1091 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1094 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1096 write_reg16(info
, CHA
+ TXFIFO
,
1097 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1099 info
->tx_count
-= c
;
1100 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1104 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1105 if (info
->tx_count
< WAKEUP_CHARS
)
1106 info
->pending_bh
|= BH_TRANSMIT
;
1107 issue_command(info
, CHA
, CMD_TXFIFO
);
1110 issue_command(info
, CHA
, CMD_TXFIFO
);
1112 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1116 static void cts_change(MGSLPC_INFO
*info
)
1119 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1120 irq_disable(info
, CHB
, IRQ_CTS
);
1122 if (info
->serial_signals
& SerialSignal_CTS
)
1123 info
->input_signal_events
.cts_up
++;
1125 info
->input_signal_events
.cts_down
++;
1126 wake_up_interruptible(&info
->status_event_wait_q
);
1127 wake_up_interruptible(&info
->event_wait_q
);
1129 if (info
->flags
& ASYNC_CTS_FLOW
) {
1130 if (info
->tty
->hw_stopped
) {
1131 if (info
->serial_signals
& SerialSignal_CTS
) {
1132 if (debug_level
>= DEBUG_LEVEL_ISR
)
1133 printk("CTS tx start...");
1135 info
->tty
->hw_stopped
= 0;
1137 info
->pending_bh
|= BH_TRANSMIT
;
1141 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1142 if (debug_level
>= DEBUG_LEVEL_ISR
)
1143 printk("CTS tx stop...");
1145 info
->tty
->hw_stopped
= 1;
1150 info
->pending_bh
|= BH_STATUS
;
1153 static void dcd_change(MGSLPC_INFO
*info
)
1156 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1157 irq_disable(info
, CHB
, IRQ_DCD
);
1159 if (info
->serial_signals
& SerialSignal_DCD
) {
1160 info
->input_signal_events
.dcd_up
++;
1163 info
->input_signal_events
.dcd_down
++;
1164 #if SYNCLINK_GENERIC_HDLC
1165 if (info
->netcount
) {
1166 if (info
->serial_signals
& SerialSignal_DCD
)
1167 netif_carrier_on(info
->netdev
);
1169 netif_carrier_off(info
->netdev
);
1172 wake_up_interruptible(&info
->status_event_wait_q
);
1173 wake_up_interruptible(&info
->event_wait_q
);
1175 if (info
->flags
& ASYNC_CHECK_CD
) {
1176 if (debug_level
>= DEBUG_LEVEL_ISR
)
1177 printk("%s CD now %s...", info
->device_name
,
1178 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1179 if (info
->serial_signals
& SerialSignal_DCD
)
1180 wake_up_interruptible(&info
->open_wait
);
1182 if (debug_level
>= DEBUG_LEVEL_ISR
)
1183 printk("doing serial hangup...");
1185 tty_hangup(info
->tty
);
1188 info
->pending_bh
|= BH_STATUS
;
1191 static void dsr_change(MGSLPC_INFO
*info
)
1194 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1195 port_irq_disable(info
, PVR_DSR
);
1197 if (info
->serial_signals
& SerialSignal_DSR
)
1198 info
->input_signal_events
.dsr_up
++;
1200 info
->input_signal_events
.dsr_down
++;
1201 wake_up_interruptible(&info
->status_event_wait_q
);
1202 wake_up_interruptible(&info
->event_wait_q
);
1203 info
->pending_bh
|= BH_STATUS
;
1206 static void ri_change(MGSLPC_INFO
*info
)
1209 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1210 port_irq_disable(info
, PVR_RI
);
1212 if (info
->serial_signals
& SerialSignal_RI
)
1213 info
->input_signal_events
.ri_up
++;
1215 info
->input_signal_events
.ri_down
++;
1216 wake_up_interruptible(&info
->status_event_wait_q
);
1217 wake_up_interruptible(&info
->event_wait_q
);
1218 info
->pending_bh
|= BH_STATUS
;
1221 /* Interrupt service routine entry point.
1225 * irq interrupt number that caused interrupt
1226 * dev_id device ID supplied during interrupt registration
1228 static irqreturn_t
mgslpc_isr(int dummy
, void *dev_id
)
1230 MGSLPC_INFO
*info
= dev_id
;
1232 unsigned char gis
, pis
;
1235 if (debug_level
>= DEBUG_LEVEL_ISR
)
1236 printk("mgslpc_isr(%d) entry.\n", info
->irq_level
);
1238 if (!(info
->p_dev
->_locked
))
1241 spin_lock(&info
->lock
);
1243 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1244 if (debug_level
>= DEBUG_LEVEL_ISR
)
1245 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1247 if ((gis
& 0x70) || count
> 1000) {
1248 printk("synclink_cs:hardware failed or ejected\n");
1253 if (gis
& (BIT1
+ BIT0
)) {
1254 isr
= read_reg16(info
, CHB
+ ISR
);
1260 if (gis
& (BIT3
+ BIT2
))
1262 isr
= read_reg16(info
, CHA
+ ISR
);
1263 if (isr
& IRQ_TIMER
) {
1264 info
->irq_occurred
= true;
1265 irq_disable(info
, CHA
, IRQ_TIMER
);
1269 if (isr
& IRQ_EXITHUNT
) {
1270 info
->icount
.exithunt
++;
1271 wake_up_interruptible(&info
->event_wait_q
);
1273 if (isr
& IRQ_BREAK_ON
) {
1275 if (info
->flags
& ASYNC_SAK
)
1278 if (isr
& IRQ_RXTIME
) {
1279 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1281 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1282 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1283 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1285 rx_ready_async(info
, isr
& IRQ_RXEOM
);
1289 if (isr
& IRQ_UNDERRUN
) {
1290 if (info
->tx_aborting
)
1291 info
->icount
.txabort
++;
1293 info
->icount
.txunder
++;
1296 else if (isr
& IRQ_ALLSENT
) {
1297 info
->icount
.txok
++;
1300 else if (isr
& IRQ_TXFIFO
)
1304 pis
= read_reg(info
, CHA
+ PIS
);
1312 /* Request bottom half processing if there's something
1313 * for it to do and the bh is not already running
1316 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1317 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1318 printk("%s(%d):%s queueing bh task.\n",
1319 __FILE__
,__LINE__
,info
->device_name
);
1320 schedule_work(&info
->task
);
1321 info
->bh_requested
= true;
1324 spin_unlock(&info
->lock
);
1326 if (debug_level
>= DEBUG_LEVEL_ISR
)
1327 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1328 __FILE__
, __LINE__
, info
->irq_level
);
1333 /* Initialize and start device.
1335 static int startup(MGSLPC_INFO
* info
)
1339 if (debug_level
>= DEBUG_LEVEL_INFO
)
1340 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1342 if (info
->flags
& ASYNC_INITIALIZED
)
1345 if (!info
->tx_buf
) {
1346 /* allocate a page of memory for a transmit buffer */
1347 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1348 if (!info
->tx_buf
) {
1349 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1350 __FILE__
,__LINE__
,info
->device_name
);
1355 info
->pending_bh
= 0;
1357 memset(&info
->icount
, 0, sizeof(info
->icount
));
1359 setup_timer(&info
->tx_timer
, tx_timeout
, (unsigned long)info
);
1361 /* Allocate and claim adapter resources */
1362 retval
= claim_resources(info
);
1364 /* perform existance check and diagnostics */
1366 retval
= adapter_test(info
);
1369 if (capable(CAP_SYS_ADMIN
) && info
->tty
)
1370 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1371 release_resources(info
);
1375 /* program hardware for current parameters */
1376 mgslpc_change_params(info
);
1379 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1381 info
->flags
|= ASYNC_INITIALIZED
;
1386 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1388 static void shutdown(MGSLPC_INFO
* info
)
1390 unsigned long flags
;
1392 if (!(info
->flags
& ASYNC_INITIALIZED
))
1395 if (debug_level
>= DEBUG_LEVEL_INFO
)
1396 printk("%s(%d):mgslpc_shutdown(%s)\n",
1397 __FILE__
,__LINE__
, info
->device_name
);
1399 /* clear status wait queue because status changes */
1400 /* can't happen after shutting down the hardware */
1401 wake_up_interruptible(&info
->status_event_wait_q
);
1402 wake_up_interruptible(&info
->event_wait_q
);
1404 del_timer_sync(&info
->tx_timer
);
1407 free_page((unsigned long) info
->tx_buf
);
1408 info
->tx_buf
= NULL
;
1411 spin_lock_irqsave(&info
->lock
,flags
);
1416 /* TODO:disable interrupts instead of reset to preserve signal states */
1419 if (!info
->tty
|| info
->tty
->termios
->c_cflag
& HUPCL
) {
1420 info
->serial_signals
&= ~(SerialSignal_DTR
+ SerialSignal_RTS
);
1424 spin_unlock_irqrestore(&info
->lock
,flags
);
1426 release_resources(info
);
1429 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1431 info
->flags
&= ~ASYNC_INITIALIZED
;
1434 static void mgslpc_program_hw(MGSLPC_INFO
*info
)
1436 unsigned long flags
;
1438 spin_lock_irqsave(&info
->lock
,flags
);
1442 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1444 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1451 info
->dcd_chkcount
= 0;
1452 info
->cts_chkcount
= 0;
1453 info
->ri_chkcount
= 0;
1454 info
->dsr_chkcount
= 0;
1456 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1457 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1460 if (info
->netcount
|| info
->tty
->termios
->c_cflag
& CREAD
)
1463 spin_unlock_irqrestore(&info
->lock
,flags
);
1466 /* Reconfigure adapter based on new parameters
1468 static void mgslpc_change_params(MGSLPC_INFO
*info
)
1473 if (!info
->tty
|| !info
->tty
->termios
)
1476 if (debug_level
>= DEBUG_LEVEL_INFO
)
1477 printk("%s(%d):mgslpc_change_params(%s)\n",
1478 __FILE__
,__LINE__
, info
->device_name
);
1480 cflag
= info
->tty
->termios
->c_cflag
;
1482 /* if B0 rate (hangup) specified then negate DTR and RTS */
1483 /* otherwise assert DTR and RTS */
1485 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
1487 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
1489 /* byte size and parity */
1491 switch (cflag
& CSIZE
) {
1492 case CS5
: info
->params
.data_bits
= 5; break;
1493 case CS6
: info
->params
.data_bits
= 6; break;
1494 case CS7
: info
->params
.data_bits
= 7; break;
1495 case CS8
: info
->params
.data_bits
= 8; break;
1496 default: info
->params
.data_bits
= 7; break;
1500 info
->params
.stop_bits
= 2;
1502 info
->params
.stop_bits
= 1;
1504 info
->params
.parity
= ASYNC_PARITY_NONE
;
1505 if (cflag
& PARENB
) {
1507 info
->params
.parity
= ASYNC_PARITY_ODD
;
1509 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1512 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1516 /* calculate number of jiffies to transmit a full
1517 * FIFO (32 bytes) at specified data rate
1519 bits_per_char
= info
->params
.data_bits
+
1520 info
->params
.stop_bits
+ 1;
1522 /* if port data rate is set to 460800 or less then
1523 * allow tty settings to override, otherwise keep the
1524 * current data rate.
1526 if (info
->params
.data_rate
<= 460800) {
1527 info
->params
.data_rate
= tty_get_baud_rate(info
->tty
);
1530 if ( info
->params
.data_rate
) {
1531 info
->timeout
= (32*HZ
*bits_per_char
) /
1532 info
->params
.data_rate
;
1534 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1536 if (cflag
& CRTSCTS
)
1537 info
->flags
|= ASYNC_CTS_FLOW
;
1539 info
->flags
&= ~ASYNC_CTS_FLOW
;
1542 info
->flags
&= ~ASYNC_CHECK_CD
;
1544 info
->flags
|= ASYNC_CHECK_CD
;
1546 /* process tty input control flags */
1548 info
->read_status_mask
= 0;
1549 if (I_INPCK(info
->tty
))
1550 info
->read_status_mask
|= BIT7
| BIT6
;
1551 if (I_IGNPAR(info
->tty
))
1552 info
->ignore_status_mask
|= BIT7
| BIT6
;
1554 mgslpc_program_hw(info
);
1557 /* Add a character to the transmit buffer
1559 static void mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1561 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1562 unsigned long flags
;
1564 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1565 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1566 __FILE__
,__LINE__
,ch
,info
->device_name
);
1569 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1575 spin_lock_irqsave(&info
->lock
,flags
);
1577 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1578 if (info
->tx_count
< TXBUFSIZE
- 1) {
1579 info
->tx_buf
[info
->tx_put
++] = ch
;
1580 info
->tx_put
&= TXBUFSIZE
-1;
1585 spin_unlock_irqrestore(&info
->lock
,flags
);
1588 /* Enable transmitter so remaining characters in the
1589 * transmit buffer are sent.
1591 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1593 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1594 unsigned long flags
;
1596 if (debug_level
>= DEBUG_LEVEL_INFO
)
1597 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1598 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1600 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1603 if (info
->tx_count
<= 0 || tty
->stopped
||
1604 tty
->hw_stopped
|| !info
->tx_buf
)
1607 if (debug_level
>= DEBUG_LEVEL_INFO
)
1608 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1609 __FILE__
,__LINE__
,info
->device_name
);
1611 spin_lock_irqsave(&info
->lock
,flags
);
1612 if (!info
->tx_active
)
1614 spin_unlock_irqrestore(&info
->lock
,flags
);
1617 /* Send a block of data
1621 * tty pointer to tty information structure
1622 * buf pointer to buffer containing send data
1623 * count size of send data in bytes
1625 * Returns: number of characters written
1627 static int mgslpc_write(struct tty_struct
* tty
,
1628 const unsigned char *buf
, int count
)
1631 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1632 unsigned long flags
;
1634 if (debug_level
>= DEBUG_LEVEL_INFO
)
1635 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1636 __FILE__
,__LINE__
,info
->device_name
,count
);
1638 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1642 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1643 if (count
> TXBUFSIZE
) {
1647 if (info
->tx_active
)
1649 else if (info
->tx_count
)
1655 min(TXBUFSIZE
- info
->tx_count
- 1,
1656 TXBUFSIZE
- info
->tx_put
));
1660 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1662 spin_lock_irqsave(&info
->lock
,flags
);
1663 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1664 info
->tx_count
+= c
;
1665 spin_unlock_irqrestore(&info
->lock
,flags
);
1672 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
1673 spin_lock_irqsave(&info
->lock
,flags
);
1674 if (!info
->tx_active
)
1676 spin_unlock_irqrestore(&info
->lock
,flags
);
1679 if (debug_level
>= DEBUG_LEVEL_INFO
)
1680 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1681 __FILE__
,__LINE__
,info
->device_name
,ret
);
1685 /* Return the count of free bytes in transmit buffer
1687 static int mgslpc_write_room(struct tty_struct
*tty
)
1689 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1692 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1695 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1696 /* HDLC (frame oriented) mode */
1697 if (info
->tx_active
)
1700 return HDLC_MAX_FRAME_SIZE
;
1702 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1707 if (debug_level
>= DEBUG_LEVEL_INFO
)
1708 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1709 __FILE__
,__LINE__
, info
->device_name
, ret
);
1713 /* Return the count of bytes in transmit buffer
1715 static int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1717 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1720 if (debug_level
>= DEBUG_LEVEL_INFO
)
1721 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1722 __FILE__
,__LINE__
, info
->device_name
);
1724 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1727 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1728 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1730 rc
= info
->tx_count
;
1732 if (debug_level
>= DEBUG_LEVEL_INFO
)
1733 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1734 __FILE__
,__LINE__
, info
->device_name
, rc
);
1739 /* Discard all data in the send buffer
1741 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1743 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1744 unsigned long flags
;
1746 if (debug_level
>= DEBUG_LEVEL_INFO
)
1747 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1748 __FILE__
,__LINE__
, info
->device_name
);
1750 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1753 spin_lock_irqsave(&info
->lock
,flags
);
1754 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1755 del_timer(&info
->tx_timer
);
1756 spin_unlock_irqrestore(&info
->lock
,flags
);
1758 wake_up_interruptible(&tty
->write_wait
);
1762 /* Send a high-priority XON/XOFF character
1764 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1766 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1767 unsigned long flags
;
1769 if (debug_level
>= DEBUG_LEVEL_INFO
)
1770 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1771 __FILE__
,__LINE__
, info
->device_name
, ch
);
1773 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1778 spin_lock_irqsave(&info
->lock
,flags
);
1779 if (!info
->tx_enabled
)
1781 spin_unlock_irqrestore(&info
->lock
,flags
);
1785 /* Signal remote device to throttle send data (our receive data)
1787 static void mgslpc_throttle(struct tty_struct
* tty
)
1789 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1790 unsigned long flags
;
1792 if (debug_level
>= DEBUG_LEVEL_INFO
)
1793 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1794 __FILE__
,__LINE__
, info
->device_name
);
1796 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1800 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1802 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1803 spin_lock_irqsave(&info
->lock
,flags
);
1804 info
->serial_signals
&= ~SerialSignal_RTS
;
1806 spin_unlock_irqrestore(&info
->lock
,flags
);
1810 /* Signal remote device to stop throttling send data (our receive data)
1812 static void mgslpc_unthrottle(struct tty_struct
* tty
)
1814 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1815 unsigned long flags
;
1817 if (debug_level
>= DEBUG_LEVEL_INFO
)
1818 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1819 __FILE__
,__LINE__
, info
->device_name
);
1821 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1828 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1831 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1832 spin_lock_irqsave(&info
->lock
,flags
);
1833 info
->serial_signals
|= SerialSignal_RTS
;
1835 spin_unlock_irqrestore(&info
->lock
,flags
);
1839 /* get the current serial statistics
1841 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1844 if (debug_level
>= DEBUG_LEVEL_INFO
)
1845 printk("get_params(%s)\n", info
->device_name
);
1847 memset(&info
->icount
, 0, sizeof(info
->icount
));
1849 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1856 /* get the current serial parameters
1858 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1861 if (debug_level
>= DEBUG_LEVEL_INFO
)
1862 printk("get_params(%s)\n", info
->device_name
);
1863 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1869 /* set the serial parameters
1873 * info pointer to device instance data
1874 * new_params user buffer containing new serial params
1876 * Returns: 0 if success, otherwise error code
1878 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
)
1880 unsigned long flags
;
1881 MGSL_PARAMS tmp_params
;
1884 if (debug_level
>= DEBUG_LEVEL_INFO
)
1885 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1886 info
->device_name
);
1887 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1889 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1890 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1891 __FILE__
,__LINE__
,info
->device_name
);
1895 spin_lock_irqsave(&info
->lock
,flags
);
1896 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
1897 spin_unlock_irqrestore(&info
->lock
,flags
);
1899 mgslpc_change_params(info
);
1904 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
1907 if (debug_level
>= DEBUG_LEVEL_INFO
)
1908 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
1909 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
1915 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
1917 unsigned long flags
;
1918 if (debug_level
>= DEBUG_LEVEL_INFO
)
1919 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
1920 spin_lock_irqsave(&info
->lock
,flags
);
1921 info
->idle_mode
= idle_mode
;
1923 spin_unlock_irqrestore(&info
->lock
,flags
);
1927 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
1930 if (debug_level
>= DEBUG_LEVEL_INFO
)
1931 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
1932 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
1938 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
1940 unsigned long flags
;
1942 if (debug_level
>= DEBUG_LEVEL_INFO
)
1943 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
1944 spin_lock_irqsave(&info
->lock
,flags
);
1945 info
->if_mode
= if_mode
;
1947 val
= read_reg(info
, PVR
) & 0x0f;
1948 switch (info
->if_mode
)
1950 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
1951 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
1952 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
1954 write_reg(info
, PVR
, val
);
1956 spin_unlock_irqrestore(&info
->lock
,flags
);
1960 static int set_txenable(MGSLPC_INFO
* info
, int enable
)
1962 unsigned long flags
;
1964 if (debug_level
>= DEBUG_LEVEL_INFO
)
1965 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
1967 spin_lock_irqsave(&info
->lock
,flags
);
1969 if (!info
->tx_enabled
)
1972 if (info
->tx_enabled
)
1975 spin_unlock_irqrestore(&info
->lock
,flags
);
1979 static int tx_abort(MGSLPC_INFO
* info
)
1981 unsigned long flags
;
1983 if (debug_level
>= DEBUG_LEVEL_INFO
)
1984 printk("tx_abort(%s)\n", info
->device_name
);
1986 spin_lock_irqsave(&info
->lock
,flags
);
1987 if (info
->tx_active
&& info
->tx_count
&&
1988 info
->params
.mode
== MGSL_MODE_HDLC
) {
1989 /* clear data count so FIFO is not filled on next IRQ.
1990 * This results in underrun and abort transmission.
1992 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1993 info
->tx_aborting
= true;
1995 spin_unlock_irqrestore(&info
->lock
,flags
);
1999 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
2001 unsigned long flags
;
2003 if (debug_level
>= DEBUG_LEVEL_INFO
)
2004 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
2006 spin_lock_irqsave(&info
->lock
,flags
);
2008 if (!info
->rx_enabled
)
2011 if (info
->rx_enabled
)
2014 spin_unlock_irqrestore(&info
->lock
,flags
);
2018 /* wait for specified event to occur
2020 * Arguments: info pointer to device instance data
2021 * mask pointer to bitmask of events to wait for
2022 * Return Value: 0 if successful and bit mask updated with
2023 * of events triggerred,
2024 * otherwise error code
2026 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
2028 unsigned long flags
;
2031 struct mgsl_icount cprev
, cnow
;
2034 struct _input_signal_events oldsigs
, newsigs
;
2035 DECLARE_WAITQUEUE(wait
, current
);
2037 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
2041 if (debug_level
>= DEBUG_LEVEL_INFO
)
2042 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
2044 spin_lock_irqsave(&info
->lock
,flags
);
2046 /* return immediately if state matches requested events */
2048 s
= info
->serial_signals
;
2050 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
2051 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
2052 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
2053 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
2055 spin_unlock_irqrestore(&info
->lock
,flags
);
2059 /* save current irq counts */
2060 cprev
= info
->icount
;
2061 oldsigs
= info
->input_signal_events
;
2063 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
2064 (mask
& MgslEvent_ExitHuntMode
))
2065 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
2067 set_current_state(TASK_INTERRUPTIBLE
);
2068 add_wait_queue(&info
->event_wait_q
, &wait
);
2070 spin_unlock_irqrestore(&info
->lock
,flags
);
2075 if (signal_pending(current
)) {
2080 /* get current irq counts */
2081 spin_lock_irqsave(&info
->lock
,flags
);
2082 cnow
= info
->icount
;
2083 newsigs
= info
->input_signal_events
;
2084 set_current_state(TASK_INTERRUPTIBLE
);
2085 spin_unlock_irqrestore(&info
->lock
,flags
);
2087 /* if no change, wait aborted for some reason */
2088 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2089 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2090 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2091 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2092 newsigs
.cts_up
== oldsigs
.cts_up
&&
2093 newsigs
.cts_down
== oldsigs
.cts_down
&&
2094 newsigs
.ri_up
== oldsigs
.ri_up
&&
2095 newsigs
.ri_down
== oldsigs
.ri_down
&&
2096 cnow
.exithunt
== cprev
.exithunt
&&
2097 cnow
.rxidle
== cprev
.rxidle
) {
2103 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2104 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2105 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2106 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2107 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2108 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2109 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2110 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2111 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2112 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2120 remove_wait_queue(&info
->event_wait_q
, &wait
);
2121 set_current_state(TASK_RUNNING
);
2123 if (mask
& MgslEvent_ExitHuntMode
) {
2124 spin_lock_irqsave(&info
->lock
,flags
);
2125 if (!waitqueue_active(&info
->event_wait_q
))
2126 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2127 spin_unlock_irqrestore(&info
->lock
,flags
);
2131 PUT_USER(rc
, events
, mask_ptr
);
2135 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2137 unsigned long flags
;
2139 struct mgsl_icount cprev
, cnow
;
2140 DECLARE_WAITQUEUE(wait
, current
);
2142 /* save current irq counts */
2143 spin_lock_irqsave(&info
->lock
,flags
);
2144 cprev
= info
->icount
;
2145 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2146 set_current_state(TASK_INTERRUPTIBLE
);
2147 spin_unlock_irqrestore(&info
->lock
,flags
);
2151 if (signal_pending(current
)) {
2156 /* get new irq counts */
2157 spin_lock_irqsave(&info
->lock
,flags
);
2158 cnow
= info
->icount
;
2159 set_current_state(TASK_INTERRUPTIBLE
);
2160 spin_unlock_irqrestore(&info
->lock
,flags
);
2162 /* if no change, wait aborted for some reason */
2163 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2164 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2169 /* check for change in caller specified modem input */
2170 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2171 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2172 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2173 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2180 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2181 set_current_state(TASK_RUNNING
);
2185 /* return the state of the serial control and status signals
2187 static int tiocmget(struct tty_struct
*tty
, struct file
*file
)
2189 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2190 unsigned int result
;
2191 unsigned long flags
;
2193 spin_lock_irqsave(&info
->lock
,flags
);
2195 spin_unlock_irqrestore(&info
->lock
,flags
);
2197 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2198 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2199 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2200 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2201 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2202 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2204 if (debug_level
>= DEBUG_LEVEL_INFO
)
2205 printk("%s(%d):%s tiocmget() value=%08X\n",
2206 __FILE__
,__LINE__
, info
->device_name
, result
);
2210 /* set modem control signals (DTR/RTS)
2212 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
2213 unsigned int set
, unsigned int clear
)
2215 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2216 unsigned long flags
;
2218 if (debug_level
>= DEBUG_LEVEL_INFO
)
2219 printk("%s(%d):%s tiocmset(%x,%x)\n",
2220 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
2222 if (set
& TIOCM_RTS
)
2223 info
->serial_signals
|= SerialSignal_RTS
;
2224 if (set
& TIOCM_DTR
)
2225 info
->serial_signals
|= SerialSignal_DTR
;
2226 if (clear
& TIOCM_RTS
)
2227 info
->serial_signals
&= ~SerialSignal_RTS
;
2228 if (clear
& TIOCM_DTR
)
2229 info
->serial_signals
&= ~SerialSignal_DTR
;
2231 spin_lock_irqsave(&info
->lock
,flags
);
2233 spin_unlock_irqrestore(&info
->lock
,flags
);
2238 /* Set or clear transmit break condition
2240 * Arguments: tty pointer to tty instance data
2241 * break_state -1=set break condition, 0=clear
2243 static void mgslpc_break(struct tty_struct
*tty
, int break_state
)
2245 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2246 unsigned long flags
;
2248 if (debug_level
>= DEBUG_LEVEL_INFO
)
2249 printk("%s(%d):mgslpc_break(%s,%d)\n",
2250 __FILE__
,__LINE__
, info
->device_name
, break_state
);
2252 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2255 spin_lock_irqsave(&info
->lock
,flags
);
2256 if (break_state
== -1)
2257 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2259 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2260 spin_unlock_irqrestore(&info
->lock
,flags
);
2263 /* Service an IOCTL request
2267 * tty pointer to tty instance data
2268 * file pointer to associated file object for device
2269 * cmd IOCTL command code
2270 * arg command argument/context
2272 * Return Value: 0 if success, otherwise error code
2274 static int mgslpc_ioctl(struct tty_struct
*tty
, struct file
* file
,
2275 unsigned int cmd
, unsigned long arg
)
2277 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2279 if (debug_level
>= DEBUG_LEVEL_INFO
)
2280 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2281 info
->device_name
, cmd
);
2283 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2286 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2287 (cmd
!= TIOCMIWAIT
) && (cmd
!= TIOCGICOUNT
)) {
2288 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2292 return ioctl_common(info
, cmd
, arg
);
2295 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
)
2298 struct mgsl_icount cnow
; /* kernel counter temps */
2299 struct serial_icounter_struct __user
*p_cuser
; /* user space */
2300 void __user
*argp
= (void __user
*)arg
;
2301 unsigned long flags
;
2304 case MGSL_IOCGPARAMS
:
2305 return get_params(info
, argp
);
2306 case MGSL_IOCSPARAMS
:
2307 return set_params(info
, argp
);
2308 case MGSL_IOCGTXIDLE
:
2309 return get_txidle(info
, argp
);
2310 case MGSL_IOCSTXIDLE
:
2311 return set_txidle(info
, (int)arg
);
2313 return get_interface(info
, argp
);
2315 return set_interface(info
,(int)arg
);
2316 case MGSL_IOCTXENABLE
:
2317 return set_txenable(info
,(int)arg
);
2318 case MGSL_IOCRXENABLE
:
2319 return set_rxenable(info
,(int)arg
);
2320 case MGSL_IOCTXABORT
:
2321 return tx_abort(info
);
2322 case MGSL_IOCGSTATS
:
2323 return get_stats(info
, argp
);
2324 case MGSL_IOCWAITEVENT
:
2325 return wait_events(info
, argp
);
2327 return modem_input_wait(info
,(int)arg
);
2329 spin_lock_irqsave(&info
->lock
,flags
);
2330 cnow
= info
->icount
;
2331 spin_unlock_irqrestore(&info
->lock
,flags
);
2333 PUT_USER(error
,cnow
.cts
, &p_cuser
->cts
);
2334 if (error
) return error
;
2335 PUT_USER(error
,cnow
.dsr
, &p_cuser
->dsr
);
2336 if (error
) return error
;
2337 PUT_USER(error
,cnow
.rng
, &p_cuser
->rng
);
2338 if (error
) return error
;
2339 PUT_USER(error
,cnow
.dcd
, &p_cuser
->dcd
);
2340 if (error
) return error
;
2341 PUT_USER(error
,cnow
.rx
, &p_cuser
->rx
);
2342 if (error
) return error
;
2343 PUT_USER(error
,cnow
.tx
, &p_cuser
->tx
);
2344 if (error
) return error
;
2345 PUT_USER(error
,cnow
.frame
, &p_cuser
->frame
);
2346 if (error
) return error
;
2347 PUT_USER(error
,cnow
.overrun
, &p_cuser
->overrun
);
2348 if (error
) return error
;
2349 PUT_USER(error
,cnow
.parity
, &p_cuser
->parity
);
2350 if (error
) return error
;
2351 PUT_USER(error
,cnow
.brk
, &p_cuser
->brk
);
2352 if (error
) return error
;
2353 PUT_USER(error
,cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
2354 if (error
) return error
;
2357 return -ENOIOCTLCMD
;
2362 /* Set new termios settings
2366 * tty pointer to tty structure
2367 * termios pointer to buffer to hold returned old termios
2369 static void mgslpc_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2371 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2372 unsigned long flags
;
2374 if (debug_level
>= DEBUG_LEVEL_INFO
)
2375 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2376 tty
->driver
->name
);
2378 /* just return if nothing has changed */
2379 if ((tty
->termios
->c_cflag
== old_termios
->c_cflag
)
2380 && (RELEVANT_IFLAG(tty
->termios
->c_iflag
)
2381 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2384 mgslpc_change_params(info
);
2386 /* Handle transition to B0 status */
2387 if (old_termios
->c_cflag
& CBAUD
&&
2388 !(tty
->termios
->c_cflag
& CBAUD
)) {
2389 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2390 spin_lock_irqsave(&info
->lock
,flags
);
2392 spin_unlock_irqrestore(&info
->lock
,flags
);
2395 /* Handle transition away from B0 status */
2396 if (!(old_termios
->c_cflag
& CBAUD
) &&
2397 tty
->termios
->c_cflag
& CBAUD
) {
2398 info
->serial_signals
|= SerialSignal_DTR
;
2399 if (!(tty
->termios
->c_cflag
& CRTSCTS
) ||
2400 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2401 info
->serial_signals
|= SerialSignal_RTS
;
2403 spin_lock_irqsave(&info
->lock
,flags
);
2405 spin_unlock_irqrestore(&info
->lock
,flags
);
2408 /* Handle turning off CRTSCTS */
2409 if (old_termios
->c_cflag
& CRTSCTS
&&
2410 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2411 tty
->hw_stopped
= 0;
2416 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2418 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2420 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2423 if (debug_level
>= DEBUG_LEVEL_INFO
)
2424 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2425 __FILE__
,__LINE__
, info
->device_name
, info
->count
);
2430 if (tty_hung_up_p(filp
))
2433 if ((tty
->count
== 1) && (info
->count
!= 1)) {
2435 * tty->count is 1 and the tty structure will be freed.
2436 * info->count should be one in this case.
2437 * if it's not, correct it so that the port is shutdown.
2439 printk("mgslpc_close: bad refcount; tty->count is 1, "
2440 "info->count is %d\n", info
->count
);
2446 /* if at least one open remaining, leave hardware active */
2450 info
->flags
|= ASYNC_CLOSING
;
2452 /* set tty->closing to notify line discipline to
2453 * only process XON/XOFF characters. Only the N_TTY
2454 * discipline appears to use this (ppp does not).
2458 /* wait for transmit data to clear all layers */
2460 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
) {
2461 if (debug_level
>= DEBUG_LEVEL_INFO
)
2462 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2463 __FILE__
,__LINE__
, info
->device_name
);
2464 tty_wait_until_sent(tty
, info
->closing_wait
);
2467 if (info
->flags
& ASYNC_INITIALIZED
)
2468 mgslpc_wait_until_sent(tty
, info
->timeout
);
2470 if (tty
->driver
->flush_buffer
)
2471 tty
->driver
->flush_buffer(tty
);
2473 ldisc_flush_buffer(tty
);
2480 if (info
->blocked_open
) {
2481 if (info
->close_delay
) {
2482 msleep_interruptible(jiffies_to_msecs(info
->close_delay
));
2484 wake_up_interruptible(&info
->open_wait
);
2487 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
|ASYNC_CLOSING
);
2489 wake_up_interruptible(&info
->close_wait
);
2492 if (debug_level
>= DEBUG_LEVEL_INFO
)
2493 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2494 tty
->driver
->name
, info
->count
);
2497 /* Wait until the transmitter is empty.
2499 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2501 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2502 unsigned long orig_jiffies
, char_time
;
2507 if (debug_level
>= DEBUG_LEVEL_INFO
)
2508 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2509 __FILE__
,__LINE__
, info
->device_name
);
2511 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2514 if (!(info
->flags
& ASYNC_INITIALIZED
))
2517 orig_jiffies
= jiffies
;
2519 /* Set check interval to 1/5 of estimated time to
2520 * send a character, and make it at least 1. The check
2521 * interval should also be less than the timeout.
2522 * Note: use tight timings here to satisfy the NIST-PCTS.
2525 if ( info
->params
.data_rate
) {
2526 char_time
= info
->timeout
/(32 * 5);
2533 char_time
= min_t(unsigned long, char_time
, timeout
);
2535 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2536 while (info
->tx_active
) {
2537 msleep_interruptible(jiffies_to_msecs(char_time
));
2538 if (signal_pending(current
))
2540 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2544 while ((info
->tx_count
|| info
->tx_active
) &&
2546 msleep_interruptible(jiffies_to_msecs(char_time
));
2547 if (signal_pending(current
))
2549 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2555 if (debug_level
>= DEBUG_LEVEL_INFO
)
2556 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2557 __FILE__
,__LINE__
, info
->device_name
);
2560 /* Called by tty_hangup() when a hangup is signaled.
2561 * This is the same as closing all open files for the port.
2563 static void mgslpc_hangup(struct tty_struct
*tty
)
2565 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2567 if (debug_level
>= DEBUG_LEVEL_INFO
)
2568 printk("%s(%d):mgslpc_hangup(%s)\n",
2569 __FILE__
,__LINE__
, info
->device_name
);
2571 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2574 mgslpc_flush_buffer(tty
);
2578 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2581 wake_up_interruptible(&info
->open_wait
);
2584 /* Block the current process until the specified port
2585 * is ready to be opened.
2587 static int block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
2590 DECLARE_WAITQUEUE(wait
, current
);
2592 bool do_clocal
= false;
2593 bool extra_count
= false;
2594 unsigned long flags
;
2596 if (debug_level
>= DEBUG_LEVEL_INFO
)
2597 printk("%s(%d):block_til_ready on %s\n",
2598 __FILE__
,__LINE__
, tty
->driver
->name
);
2600 if (filp
->f_flags
& O_NONBLOCK
|| tty
->flags
& (1 << TTY_IO_ERROR
)){
2601 /* nonblock mode is set or port is not enabled */
2602 /* just verify that callout device is not active */
2603 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2607 if (tty
->termios
->c_cflag
& CLOCAL
)
2610 /* Wait for carrier detect and the line to become
2611 * free (i.e., not in use by the callout). While we are in
2612 * this loop, info->count is dropped by one, so that
2613 * mgslpc_close() knows when to free things. We restore it upon
2614 * exit, either normal or abnormal.
2618 add_wait_queue(&info
->open_wait
, &wait
);
2620 if (debug_level
>= DEBUG_LEVEL_INFO
)
2621 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2622 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2624 spin_lock_irqsave(&info
->lock
, flags
);
2625 if (!tty_hung_up_p(filp
)) {
2629 spin_unlock_irqrestore(&info
->lock
, flags
);
2630 info
->blocked_open
++;
2633 if ((tty
->termios
->c_cflag
& CBAUD
)) {
2634 spin_lock_irqsave(&info
->lock
,flags
);
2635 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2637 spin_unlock_irqrestore(&info
->lock
,flags
);
2640 set_current_state(TASK_INTERRUPTIBLE
);
2642 if (tty_hung_up_p(filp
) || !(info
->flags
& ASYNC_INITIALIZED
)){
2643 retval
= (info
->flags
& ASYNC_HUP_NOTIFY
) ?
2644 -EAGAIN
: -ERESTARTSYS
;
2648 spin_lock_irqsave(&info
->lock
,flags
);
2650 spin_unlock_irqrestore(&info
->lock
,flags
);
2652 if (!(info
->flags
& ASYNC_CLOSING
) &&
2653 (do_clocal
|| (info
->serial_signals
& SerialSignal_DCD
)) ) {
2657 if (signal_pending(current
)) {
2658 retval
= -ERESTARTSYS
;
2662 if (debug_level
>= DEBUG_LEVEL_INFO
)
2663 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2664 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2669 set_current_state(TASK_RUNNING
);
2670 remove_wait_queue(&info
->open_wait
, &wait
);
2674 info
->blocked_open
--;
2676 if (debug_level
>= DEBUG_LEVEL_INFO
)
2677 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2678 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2681 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2686 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2690 unsigned long flags
;
2692 /* verify range of specified line number */
2694 if ((line
< 0) || (line
>= mgslpc_device_count
)) {
2695 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2696 __FILE__
,__LINE__
,line
);
2700 /* find the info structure for the specified line */
2701 info
= mgslpc_device_list
;
2702 while(info
&& info
->line
!= line
)
2703 info
= info
->next_device
;
2704 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2707 tty
->driver_data
= info
;
2710 if (debug_level
>= DEBUG_LEVEL_INFO
)
2711 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2712 __FILE__
,__LINE__
,tty
->driver
->name
, info
->count
);
2714 /* If port is closing, signal caller to try again */
2715 if (tty_hung_up_p(filp
) || info
->flags
& ASYNC_CLOSING
){
2716 if (info
->flags
& ASYNC_CLOSING
)
2717 interruptible_sleep_on(&info
->close_wait
);
2718 retval
= ((info
->flags
& ASYNC_HUP_NOTIFY
) ?
2719 -EAGAIN
: -ERESTARTSYS
);
2723 info
->tty
->low_latency
= (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2725 spin_lock_irqsave(&info
->netlock
, flags
);
2726 if (info
->netcount
) {
2728 spin_unlock_irqrestore(&info
->netlock
, flags
);
2732 spin_unlock_irqrestore(&info
->netlock
, flags
);
2734 if (info
->count
== 1) {
2735 /* 1st open on this device, init hardware */
2736 retval
= startup(info
);
2741 retval
= block_til_ready(tty
, filp
, info
);
2743 if (debug_level
>= DEBUG_LEVEL_INFO
)
2744 printk("%s(%d):block_til_ready(%s) returned %d\n",
2745 __FILE__
,__LINE__
, info
->device_name
, retval
);
2749 if (debug_level
>= DEBUG_LEVEL_INFO
)
2750 printk("%s(%d):mgslpc_open(%s) success\n",
2751 __FILE__
,__LINE__
, info
->device_name
);
2756 if (tty
->count
== 1)
2757 info
->tty
= NULL
; /* tty layer will release tty struct */
2766 * /proc fs routines....
2769 static inline int line_info(char *buf
, MGSLPC_INFO
*info
)
2773 unsigned long flags
;
2775 ret
= sprintf(buf
, "%s:io:%04X irq:%d",
2776 info
->device_name
, info
->io_base
, info
->irq_level
);
2778 /* output current serial signal states */
2779 spin_lock_irqsave(&info
->lock
,flags
);
2781 spin_unlock_irqrestore(&info
->lock
,flags
);
2785 if (info
->serial_signals
& SerialSignal_RTS
)
2786 strcat(stat_buf
, "|RTS");
2787 if (info
->serial_signals
& SerialSignal_CTS
)
2788 strcat(stat_buf
, "|CTS");
2789 if (info
->serial_signals
& SerialSignal_DTR
)
2790 strcat(stat_buf
, "|DTR");
2791 if (info
->serial_signals
& SerialSignal_DSR
)
2792 strcat(stat_buf
, "|DSR");
2793 if (info
->serial_signals
& SerialSignal_DCD
)
2794 strcat(stat_buf
, "|CD");
2795 if (info
->serial_signals
& SerialSignal_RI
)
2796 strcat(stat_buf
, "|RI");
2798 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2799 ret
+= sprintf(buf
+ret
, " HDLC txok:%d rxok:%d",
2800 info
->icount
.txok
, info
->icount
.rxok
);
2801 if (info
->icount
.txunder
)
2802 ret
+= sprintf(buf
+ret
, " txunder:%d", info
->icount
.txunder
);
2803 if (info
->icount
.txabort
)
2804 ret
+= sprintf(buf
+ret
, " txabort:%d", info
->icount
.txabort
);
2805 if (info
->icount
.rxshort
)
2806 ret
+= sprintf(buf
+ret
, " rxshort:%d", info
->icount
.rxshort
);
2807 if (info
->icount
.rxlong
)
2808 ret
+= sprintf(buf
+ret
, " rxlong:%d", info
->icount
.rxlong
);
2809 if (info
->icount
.rxover
)
2810 ret
+= sprintf(buf
+ret
, " rxover:%d", info
->icount
.rxover
);
2811 if (info
->icount
.rxcrc
)
2812 ret
+= sprintf(buf
+ret
, " rxcrc:%d", info
->icount
.rxcrc
);
2814 ret
+= sprintf(buf
+ret
, " ASYNC tx:%d rx:%d",
2815 info
->icount
.tx
, info
->icount
.rx
);
2816 if (info
->icount
.frame
)
2817 ret
+= sprintf(buf
+ret
, " fe:%d", info
->icount
.frame
);
2818 if (info
->icount
.parity
)
2819 ret
+= sprintf(buf
+ret
, " pe:%d", info
->icount
.parity
);
2820 if (info
->icount
.brk
)
2821 ret
+= sprintf(buf
+ret
, " brk:%d", info
->icount
.brk
);
2822 if (info
->icount
.overrun
)
2823 ret
+= sprintf(buf
+ret
, " oe:%d", info
->icount
.overrun
);
2826 /* Append serial signal status to end */
2827 ret
+= sprintf(buf
+ret
, " %s\n", stat_buf
+1);
2829 ret
+= sprintf(buf
+ret
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2830 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2836 /* Called to print information about devices
2838 static int mgslpc_read_proc(char *page
, char **start
, off_t off
, int count
,
2839 int *eof
, void *data
)
2845 len
+= sprintf(page
, "synclink driver:%s\n", driver_version
);
2847 info
= mgslpc_device_list
;
2849 l
= line_info(page
+ len
, info
);
2851 if (len
+begin
> off
+count
)
2853 if (len
+begin
< off
) {
2857 info
= info
->next_device
;
2862 if (off
>= len
+begin
)
2864 *start
= page
+ (off
-begin
);
2865 return ((count
< begin
+len
-off
) ? count
: begin
+len
-off
);
2868 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2870 /* each buffer has header and data */
2871 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2873 /* calculate total allocation size for 8 buffers */
2874 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2876 /* limit total allocated memory */
2877 if (info
->rx_buf_total_size
> 0x10000)
2878 info
->rx_buf_total_size
= 0x10000;
2880 /* calculate number of buffers */
2881 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2883 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2884 if (info
->rx_buf
== NULL
)
2887 rx_reset_buffers(info
);
2891 static void rx_free_buffers(MGSLPC_INFO
*info
)
2893 kfree(info
->rx_buf
);
2894 info
->rx_buf
= NULL
;
2897 static int claim_resources(MGSLPC_INFO
*info
)
2899 if (rx_alloc_buffers(info
) < 0 ) {
2900 printk( "Cant allocate rx buffer %s\n", info
->device_name
);
2901 release_resources(info
);
2907 static void release_resources(MGSLPC_INFO
*info
)
2909 if (debug_level
>= DEBUG_LEVEL_INFO
)
2910 printk("release_resources(%s)\n", info
->device_name
);
2911 rx_free_buffers(info
);
2914 /* Add the specified device instance data structure to the
2915 * global linked list of devices and increment the device count.
2917 * Arguments: info pointer to device instance data
2919 static void mgslpc_add_device(MGSLPC_INFO
*info
)
2921 info
->next_device
= NULL
;
2922 info
->line
= mgslpc_device_count
;
2923 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2925 if (info
->line
< MAX_DEVICE_COUNT
) {
2926 if (maxframe
[info
->line
])
2927 info
->max_frame_size
= maxframe
[info
->line
];
2928 info
->dosyncppp
= dosyncppp
[info
->line
];
2931 mgslpc_device_count
++;
2933 if (!mgslpc_device_list
)
2934 mgslpc_device_list
= info
;
2936 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
2937 while( current_dev
->next_device
)
2938 current_dev
= current_dev
->next_device
;
2939 current_dev
->next_device
= info
;
2942 if (info
->max_frame_size
< 4096)
2943 info
->max_frame_size
= 4096;
2944 else if (info
->max_frame_size
> 65535)
2945 info
->max_frame_size
= 65535;
2947 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2948 info
->device_name
, info
->io_base
, info
->irq_level
);
2950 #if SYNCLINK_GENERIC_HDLC
2955 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2957 MGSLPC_INFO
*info
= mgslpc_device_list
;
2958 MGSLPC_INFO
*last
= NULL
;
2961 if (info
== remove_info
) {
2963 last
->next_device
= info
->next_device
;
2965 mgslpc_device_list
= info
->next_device
;
2966 #if SYNCLINK_GENERIC_HDLC
2969 release_resources(info
);
2971 mgslpc_device_count
--;
2975 info
= info
->next_device
;
2979 static struct pcmcia_device_id mgslpc_ids
[] = {
2980 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2983 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2985 static struct pcmcia_driver mgslpc_driver
= {
2986 .owner
= THIS_MODULE
,
2988 .name
= "synclink_cs",
2990 .probe
= mgslpc_probe
,
2991 .remove
= mgslpc_detach
,
2992 .id_table
= mgslpc_ids
,
2993 .suspend
= mgslpc_suspend
,
2994 .resume
= mgslpc_resume
,
2997 static const struct tty_operations mgslpc_ops
= {
2998 .open
= mgslpc_open
,
2999 .close
= mgslpc_close
,
3000 .write
= mgslpc_write
,
3001 .put_char
= mgslpc_put_char
,
3002 .flush_chars
= mgslpc_flush_chars
,
3003 .write_room
= mgslpc_write_room
,
3004 .chars_in_buffer
= mgslpc_chars_in_buffer
,
3005 .flush_buffer
= mgslpc_flush_buffer
,
3006 .ioctl
= mgslpc_ioctl
,
3007 .throttle
= mgslpc_throttle
,
3008 .unthrottle
= mgslpc_unthrottle
,
3009 .send_xchar
= mgslpc_send_xchar
,
3010 .break_ctl
= mgslpc_break
,
3011 .wait_until_sent
= mgslpc_wait_until_sent
,
3012 .read_proc
= mgslpc_read_proc
,
3013 .set_termios
= mgslpc_set_termios
,
3015 .start
= tx_release
,
3016 .hangup
= mgslpc_hangup
,
3017 .tiocmget
= tiocmget
,
3018 .tiocmset
= tiocmset
,
3021 static void synclink_cs_cleanup(void)
3025 printk("Unloading %s: version %s\n", driver_name
, driver_version
);
3027 while(mgslpc_device_list
)
3028 mgslpc_remove_device(mgslpc_device_list
);
3030 if (serial_driver
) {
3031 if ((rc
= tty_unregister_driver(serial_driver
)))
3032 printk("%s(%d) failed to unregister tty driver err=%d\n",
3033 __FILE__
,__LINE__
,rc
);
3034 put_tty_driver(serial_driver
);
3037 pcmcia_unregister_driver(&mgslpc_driver
);
3040 static int __init
synclink_cs_init(void)
3044 if (break_on_load
) {
3045 mgslpc_get_text_ptr();
3049 printk("%s %s\n", driver_name
, driver_version
);
3051 if ((rc
= pcmcia_register_driver(&mgslpc_driver
)) < 0)
3054 serial_driver
= alloc_tty_driver(MAX_DEVICE_COUNT
);
3055 if (!serial_driver
) {
3060 /* Initialize the tty_driver structure */
3062 serial_driver
->owner
= THIS_MODULE
;
3063 serial_driver
->driver_name
= "synclink_cs";
3064 serial_driver
->name
= "ttySLP";
3065 serial_driver
->major
= ttymajor
;
3066 serial_driver
->minor_start
= 64;
3067 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
3068 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
3069 serial_driver
->init_termios
= tty_std_termios
;
3070 serial_driver
->init_termios
.c_cflag
=
3071 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
3072 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
3073 tty_set_operations(serial_driver
, &mgslpc_ops
);
3075 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
3076 printk("%s(%d):Couldn't register serial driver\n",
3078 put_tty_driver(serial_driver
);
3079 serial_driver
= NULL
;
3083 printk("%s %s, tty major#%d\n",
3084 driver_name
, driver_version
,
3085 serial_driver
->major
);
3090 synclink_cs_cleanup();
3094 static void __exit
synclink_cs_exit(void)
3096 synclink_cs_cleanup();
3099 module_init(synclink_cs_init
);
3100 module_exit(synclink_cs_exit
);
3102 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
3107 /* note:standard BRG mode is broken in V3.2 chip
3108 * so enhanced mode is always used
3116 for (M
= 1; N
> 64 && M
< 16; M
++)
3122 * BGR[7..0] contained in BGR register
3123 * BGR[9..8] contained in CCR2[7..6]
3124 * divisor = (N+1)*2^M
3126 * Note: M *must* not be zero (causes asymetric duty cycle)
3128 write_reg(info
, (unsigned char) (channel
+ BGR
),
3129 (unsigned char) ((M
<< 6) + N
));
3130 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
3131 val
|= ((M
<< 4) & 0xc0);
3132 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
3136 /* Enabled the AUX clock output at the specified frequency.
3138 static void enable_auxclk(MGSLPC_INFO
*info
)
3144 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3145 * 05 ADM Address Mode, 0 = no addr recognition
3146 * 04 TMD Timer Mode, 0 = external
3147 * 03 RAC Receiver Active, 0 = inactive
3148 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3149 * 01 TRS Timer Resolution, 1=512
3150 * 00 TLP Test Loop, 0 = no loop
3156 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3157 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3159 write_reg(info
, CHB
+ MODE
, val
);
3163 * 07 PU Power Up, 1=active, 0=power down
3164 * 06 MCE Master Clock Enable, 1=enabled
3166 * 04..02 SC[2..0] Encoding
3167 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3171 write_reg(info
, CHB
+ CCR0
, 0xc0);
3175 * 07 SFLG Shared Flag, 0 = disable shared flags
3176 * 06 GALP Go Active On Loop, 0 = not used
3177 * 05 GLP Go On Loop, 0 = not used
3178 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3179 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3180 * 02..00 CM[2..0] Clock Mode
3184 write_reg(info
, CHB
+ CCR1
, 0x17);
3188 * 07..06 BGR[9..8] Baud rate bits 9..8
3189 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3190 * 04 SSEL Clock source select, 1=submode b
3191 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3192 * 02 RWX Read/Write Exchange 0=disabled
3193 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3194 * 00 DIV, data inversion 0=disabled, 1=enabled
3198 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3199 write_reg(info
, CHB
+ CCR2
, 0x38);
3201 write_reg(info
, CHB
+ CCR2
, 0x30);
3205 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3206 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3207 * 05 TST1 Test Pin, 0=normal operation
3208 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3209 * 03..02 Reserved, must be 0
3210 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3214 write_reg(info
, CHB
+ CCR4
, 0x50);
3216 /* if auxclk not enabled, set internal BRG so
3217 * CTS transitions can be detected (requires TxC)
3219 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3220 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
3222 mgslpc_set_rate(info
, CHB
, 921600);
3225 static void loopback_enable(MGSLPC_INFO
*info
)
3229 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3230 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
3231 write_reg(info
, CHA
+ CCR1
, val
);
3233 /* CCR2:04 SSEL Clock source select, 1=submode b */
3234 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3235 write_reg(info
, CHA
+ CCR2
, val
);
3237 /* set LinkSpeed if available, otherwise default to 2Mbps */
3238 if (info
->params
.clock_speed
)
3239 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3241 mgslpc_set_rate(info
, CHA
, 1843200);
3243 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3244 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3245 write_reg(info
, CHA
+ MODE
, val
);
3248 static void hdlc_mode(MGSLPC_INFO
*info
)
3251 unsigned char clkmode
, clksubmode
;
3253 /* disable all interrupts */
3254 irq_disable(info
, CHA
, 0xffff);
3255 irq_disable(info
, CHB
, 0xffff);
3256 port_irq_disable(info
, 0xff);
3258 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3259 clkmode
= clksubmode
= 0;
3260 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3261 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3262 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3264 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3265 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3266 /* clock mode 7b, rcv = BRG, xmt = BRG */
3269 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3270 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3271 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3275 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3278 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3279 /* clock mode 0b, rcv = RxC, xmt = BRG */
3285 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3286 * 05 ADM Address Mode, 0 = no addr recognition
3287 * 04 TMD Timer Mode, 0 = external
3288 * 03 RAC Receiver Active, 0 = inactive
3289 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3290 * 01 TRS Timer Resolution, 1=512
3291 * 00 TLP Test Loop, 0 = no loop
3296 if (info
->params
.loopback
)
3299 /* preserve RTS state */
3300 if (info
->serial_signals
& SerialSignal_RTS
)
3302 write_reg(info
, CHA
+ MODE
, val
);
3306 * 07 PU Power Up, 1=active, 0=power down
3307 * 06 MCE Master Clock Enable, 1=enabled
3309 * 04..02 SC[2..0] Encoding
3310 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3315 switch (info
->params
.encoding
)
3317 case HDLC_ENCODING_NRZI
:
3320 case HDLC_ENCODING_BIPHASE_SPACE
:
3323 case HDLC_ENCODING_BIPHASE_MARK
:
3326 case HDLC_ENCODING_BIPHASE_LEVEL
:
3328 break; // Manchester
3330 write_reg(info
, CHA
+ CCR0
, val
);
3334 * 07 SFLG Shared Flag, 0 = disable shared flags
3335 * 06 GALP Go Active On Loop, 0 = not used
3336 * 05 GLP Go On Loop, 0 = not used
3337 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3338 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3339 * 02..00 CM[2..0] Clock Mode
3343 val
= 0x10 + clkmode
;
3344 write_reg(info
, CHA
+ CCR1
, val
);
3348 * 07..06 BGR[9..8] Baud rate bits 9..8
3349 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3350 * 04 SSEL Clock source select, 1=submode b
3351 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3352 * 02 RWX Read/Write Exchange 0=disabled
3353 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3354 * 00 DIV, data inversion 0=disabled, 1=enabled
3359 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3360 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3364 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3366 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3368 write_reg(info
, CHA
+ CCR2
, val
);
3372 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3373 * 05 EPT Enable preamble transmission, 1=enabled
3374 * 04 RADD Receive address pushed to FIFO, 0=disabled
3375 * 03 CRL CRC Reset Level, 0=FFFF
3376 * 02 RCRC Rx CRC 0=On 1=Off
3377 * 01 TCRC Tx CRC 0=On 1=Off
3378 * 00 PSD DPLL Phase Shift Disable
3383 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3385 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3387 switch (info
->params
.preamble_length
)
3389 case HDLC_PREAMBLE_LENGTH_16BITS
:
3392 case HDLC_PREAMBLE_LENGTH_32BITS
:
3395 case HDLC_PREAMBLE_LENGTH_64BITS
:
3399 write_reg(info
, CHA
+ CCR3
, val
);
3401 /* PRE - Preamble pattern */
3403 switch (info
->params
.preamble
)
3405 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3406 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3407 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3408 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3410 write_reg(info
, CHA
+ PRE
, val
);
3414 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3415 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3416 * 05 TST1 Test Pin, 0=normal operation
3417 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3418 * 03..02 Reserved, must be 0
3419 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3424 write_reg(info
, CHA
+ CCR4
, val
);
3425 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3426 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3428 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3430 /* RLCR Receive length check register
3432 * 7 1=enable receive length check
3433 * 6..0 Max frame length = (RL + 1) * 32
3435 write_reg(info
, CHA
+ RLCR
, 0);
3437 /* XBCH Transmit Byte Count High
3439 * 07 DMA mode, 0 = interrupt driven
3440 * 06 NRM, 0=ABM (ignored)
3441 * 05 CAS Carrier Auto Start
3442 * 04 XC Transmit Continuously (ignored)
3443 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3448 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3450 write_reg(info
, CHA
+ XBCH
, val
);
3451 enable_auxclk(info
);
3452 if (info
->params
.loopback
|| info
->testing_irq
)
3453 loopback_enable(info
);
3454 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3456 irq_enable(info
, CHB
, IRQ_CTS
);
3457 /* PVR[3] 1=AUTO CTS active */
3458 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3460 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3462 irq_enable(info
, CHA
,
3463 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3464 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3465 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3466 wait_command_complete(info
, CHA
);
3467 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3469 /* Master clock mode enabled above to allow reset commands
3470 * to complete even if no data clocks are present.
3472 * Disable master clock mode for normal communications because
3473 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3474 * IRQ when in master clock mode.
3476 * Leave master clock mode enabled for IRQ test because the
3477 * timer IRQ used by the test can only happen in master clock mode.
3479 if (!info
->testing_irq
)
3480 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3488 static void rx_stop(MGSLPC_INFO
*info
)
3490 if (debug_level
>= DEBUG_LEVEL_ISR
)
3491 printk("%s(%d):rx_stop(%s)\n",
3492 __FILE__
,__LINE__
, info
->device_name
);
3494 /* MODE:03 RAC Receiver Active, 0=inactive */
3495 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3497 info
->rx_enabled
= false;
3498 info
->rx_overflow
= false;
3501 static void rx_start(MGSLPC_INFO
*info
)
3503 if (debug_level
>= DEBUG_LEVEL_ISR
)
3504 printk("%s(%d):rx_start(%s)\n",
3505 __FILE__
,__LINE__
, info
->device_name
);
3507 rx_reset_buffers(info
);
3508 info
->rx_enabled
= false;
3509 info
->rx_overflow
= false;
3511 /* MODE:03 RAC Receiver Active, 1=active */
3512 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3514 info
->rx_enabled
= true;
3517 static void tx_start(MGSLPC_INFO
*info
)
3519 if (debug_level
>= DEBUG_LEVEL_ISR
)
3520 printk("%s(%d):tx_start(%s)\n",
3521 __FILE__
,__LINE__
, info
->device_name
);
3523 if (info
->tx_count
) {
3524 /* If auto RTS enabled and RTS is inactive, then assert */
3525 /* RTS and set a flag indicating that the driver should */
3526 /* negate RTS when the transmission completes. */
3527 info
->drop_rts_on_tx_done
= false;
3529 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3531 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3532 info
->serial_signals
|= SerialSignal_RTS
;
3534 info
->drop_rts_on_tx_done
= true;
3538 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3539 if (!info
->tx_active
) {
3540 info
->tx_active
= true;
3544 info
->tx_active
= true;
3546 mod_timer(&info
->tx_timer
, jiffies
+
3547 msecs_to_jiffies(5000));
3551 if (!info
->tx_enabled
)
3552 info
->tx_enabled
= true;
3555 static void tx_stop(MGSLPC_INFO
*info
)
3557 if (debug_level
>= DEBUG_LEVEL_ISR
)
3558 printk("%s(%d):tx_stop(%s)\n",
3559 __FILE__
,__LINE__
, info
->device_name
);
3561 del_timer(&info
->tx_timer
);
3563 info
->tx_enabled
= false;
3564 info
->tx_active
= false;
3567 /* Reset the adapter to a known state and prepare it for further use.
3569 static void reset_device(MGSLPC_INFO
*info
)
3571 /* power up both channels (set BIT7) */
3572 write_reg(info
, CHA
+ CCR0
, 0x80);
3573 write_reg(info
, CHB
+ CCR0
, 0x80);
3574 write_reg(info
, CHA
+ MODE
, 0);
3575 write_reg(info
, CHB
+ MODE
, 0);
3577 /* disable all interrupts */
3578 irq_disable(info
, CHA
, 0xffff);
3579 irq_disable(info
, CHB
, 0xffff);
3580 port_irq_disable(info
, 0xff);
3582 /* PCR Port Configuration Register
3584 * 07..04 DEC[3..0] Serial I/F select outputs
3585 * 03 output, 1=AUTO CTS control enabled
3586 * 02 RI Ring Indicator input 0=active
3587 * 01 DSR input 0=active
3588 * 00 DTR output 0=active
3592 write_reg(info
, PCR
, 0x06);
3594 /* PVR Port Value Register
3596 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3597 * 03 AUTO CTS output 1=enabled
3598 * 02 RI Ring Indicator input
3600 * 00 DTR output (1=inactive)
3604 // write_reg(info, PVR, PVR_DTR);
3606 /* IPC Interrupt Port Configuration
3608 * 07 VIS 1=Masked interrupts visible
3609 * 06..05 Reserved, 0
3610 * 04..03 SLA Slave address, 00 ignored
3611 * 02 CASM Cascading Mode, 1=daisy chain
3612 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3616 write_reg(info
, IPC
, 0x05);
3619 static void async_mode(MGSLPC_INFO
*info
)
3623 /* disable all interrupts */
3624 irq_disable(info
, CHA
, 0xffff);
3625 irq_disable(info
, CHB
, 0xffff);
3626 port_irq_disable(info
, 0xff);
3631 * 06 FRTS RTS State, 0=active
3632 * 05 FCTS Flow Control on CTS
3633 * 04 FLON Flow Control Enable
3634 * 03 RAC Receiver Active, 0 = inactive
3635 * 02 RTS 0=Auto RTS, 1=manual RTS
3636 * 01 TRS Timer Resolution, 1=512
3637 * 00 TLP Test Loop, 0 = no loop
3642 if (info
->params
.loopback
)
3645 /* preserve RTS state */
3646 if (!(info
->serial_signals
& SerialSignal_RTS
))
3648 write_reg(info
, CHA
+ MODE
, val
);
3652 * 07 PU Power Up, 1=active, 0=power down
3653 * 06 MCE Master Clock Enable, 1=enabled
3655 * 04..02 SC[2..0] Encoding, 000=NRZ
3656 * 01..00 SM[1..0] Serial Mode, 11=Async
3660 write_reg(info
, CHA
+ CCR0
, 0x83);
3664 * 07..05 Reserved, 0
3665 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3666 * 03 BCR Bit Clock Rate, 1=16x
3667 * 02..00 CM[2..0] Clock Mode, 111=BRG
3671 write_reg(info
, CHA
+ CCR1
, 0x1f);
3675 * 07..06 BGR[9..8] Baud rate bits 9..8
3676 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3677 * 04 SSEL Clock source select, 1=submode b
3678 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3679 * 02 RWX Read/Write Exchange 0=disabled
3681 * 00 DIV, data inversion 0=disabled, 1=enabled
3685 write_reg(info
, CHA
+ CCR2
, 0x10);
3689 * 07..01 Reserved, 0
3690 * 00 PSD DPLL Phase Shift Disable
3694 write_reg(info
, CHA
+ CCR3
, 0);
3698 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3699 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3700 * 05 TST1 Test Pin, 0=normal operation
3701 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3702 * 03..00 Reserved, must be 0
3706 write_reg(info
, CHA
+ CCR4
, 0x50);
3707 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3712 * 06 XBRK transmit break, 0=normal operation
3713 * 05 Stop bits (0=1, 1=2)
3714 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3715 * 02 PAREN Parity Enable
3716 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3720 if (info
->params
.data_bits
!= 8)
3721 val
|= BIT0
; /* 7 bits */
3722 if (info
->params
.stop_bits
!= 1)
3724 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3726 val
|= BIT2
; /* Parity enable */
3727 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3732 write_reg(info
, CHA
+ DAFO
, val
);
3734 /* RFC Rx FIFO Control
3737 * 06 DPS, 1=parity bit not stored in data byte
3738 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3739 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3740 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3742 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3746 write_reg(info
, CHA
+ RFC
, 0x5c);
3748 /* RLCR Receive length check register
3750 * Max frame length = (RL + 1) * 32
3752 write_reg(info
, CHA
+ RLCR
, 0);
3754 /* XBCH Transmit Byte Count High
3756 * 07 DMA mode, 0 = interrupt driven
3757 * 06 NRM, 0=ABM (ignored)
3758 * 05 CAS Carrier Auto Start
3759 * 04 XC Transmit Continuously (ignored)
3760 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3765 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3767 write_reg(info
, CHA
+ XBCH
, val
);
3768 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3769 irq_enable(info
, CHA
, IRQ_CTS
);
3771 /* MODE:03 RAC Receiver Active, 1=active */
3772 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3773 enable_auxclk(info
);
3774 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3775 irq_enable(info
, CHB
, IRQ_CTS
);
3776 /* PVR[3] 1=AUTO CTS active */
3777 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3779 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3780 irq_enable(info
, CHA
,
3781 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3782 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3783 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3784 wait_command_complete(info
, CHA
);
3785 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3788 /* Set the HDLC idle mode for the transmitter.
3790 static void tx_set_idle(MGSLPC_INFO
*info
)
3792 /* Note: ESCC2 only supports flags and one idle modes */
3793 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3794 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3796 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3799 /* get state of the V24 status (input) signals.
3801 static void get_signals(MGSLPC_INFO
*info
)
3803 unsigned char status
= 0;
3805 /* preserve DTR and RTS */
3806 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3808 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3809 info
->serial_signals
|= SerialSignal_DCD
;
3810 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3811 info
->serial_signals
|= SerialSignal_CTS
;
3813 status
= read_reg(info
, CHA
+ PVR
);
3814 if (!(status
& PVR_RI
))
3815 info
->serial_signals
|= SerialSignal_RI
;
3816 if (!(status
& PVR_DSR
))
3817 info
->serial_signals
|= SerialSignal_DSR
;
3820 /* Set the state of DTR and RTS based on contents of
3821 * serial_signals member of device extension.
3823 static void set_signals(MGSLPC_INFO
*info
)
3827 val
= read_reg(info
, CHA
+ MODE
);
3828 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3829 if (info
->serial_signals
& SerialSignal_RTS
)
3834 if (info
->serial_signals
& SerialSignal_RTS
)
3839 write_reg(info
, CHA
+ MODE
, val
);
3841 if (info
->serial_signals
& SerialSignal_DTR
)
3842 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3844 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3847 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3854 info
->rx_frame_count
= 0;
3855 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3856 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3857 buf
->status
= buf
->count
= 0;
3861 /* Attempt to return a received HDLC frame
3862 * Only frames received without errors are returned.
3864 * Returns true if frame returned, otherwise false
3866 static bool rx_get_frame(MGSLPC_INFO
*info
)
3868 unsigned short status
;
3870 unsigned int framesize
= 0;
3871 unsigned long flags
;
3872 struct tty_struct
*tty
= info
->tty
;
3873 bool return_frame
= false;
3875 if (info
->rx_frame_count
== 0)
3878 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3880 status
= buf
->status
;
3882 /* 07 VFR 1=valid frame
3883 * 06 RDO 1=data overrun
3884 * 05 CRC 1=OK, 0=error
3885 * 04 RAB 1=frame aborted
3887 if ((status
& 0xf0) != 0xA0) {
3888 if (!(status
& BIT7
) || (status
& BIT4
))
3889 info
->icount
.rxabort
++;
3890 else if (status
& BIT6
)
3891 info
->icount
.rxover
++;
3892 else if (!(status
& BIT5
)) {
3893 info
->icount
.rxcrc
++;
3894 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3895 return_frame
= true;
3898 #if SYNCLINK_GENERIC_HDLC
3900 struct net_device_stats
*stats
= hdlc_stats(info
->netdev
);
3902 stats
->rx_frame_errors
++;
3906 return_frame
= true;
3909 framesize
= buf
->count
;
3911 if (debug_level
>= DEBUG_LEVEL_BH
)
3912 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3913 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
3915 if (debug_level
>= DEBUG_LEVEL_DATA
)
3916 trace_block(info
, buf
->data
, framesize
, 0);
3919 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3920 framesize
+1 > info
->max_frame_size
) ||
3921 framesize
> info
->max_frame_size
)
3922 info
->icount
.rxlong
++;
3925 info
->icount
.rxok
++;
3927 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3928 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3932 #if SYNCLINK_GENERIC_HDLC
3934 hdlcdev_rx(info
, buf
->data
, framesize
);
3937 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3941 spin_lock_irqsave(&info
->lock
,flags
);
3942 buf
->status
= buf
->count
= 0;
3943 info
->rx_frame_count
--;
3945 if (info
->rx_get
>= info
->rx_buf_count
)
3947 spin_unlock_irqrestore(&info
->lock
,flags
);
3952 static bool register_test(MGSLPC_INFO
*info
)
3954 static unsigned char patterns
[] =
3955 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3956 static unsigned int count
= ARRAY_SIZE(patterns
);
3959 unsigned long flags
;
3961 spin_lock_irqsave(&info
->lock
,flags
);
3964 for (i
= 0; i
< count
; i
++) {
3965 write_reg(info
, XAD1
, patterns
[i
]);
3966 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3967 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3968 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3974 spin_unlock_irqrestore(&info
->lock
,flags
);
3978 static bool irq_test(MGSLPC_INFO
*info
)
3980 unsigned long end_time
;
3981 unsigned long flags
;
3983 spin_lock_irqsave(&info
->lock
,flags
);
3986 info
->testing_irq
= true;
3989 info
->irq_occurred
= false;
3991 /* init hdlc mode */
3993 irq_enable(info
, CHA
, IRQ_TIMER
);
3994 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
3995 issue_command(info
, CHA
, CMD_START_TIMER
);
3997 spin_unlock_irqrestore(&info
->lock
,flags
);
4000 while(end_time
-- && !info
->irq_occurred
) {
4001 msleep_interruptible(10);
4004 info
->testing_irq
= false;
4006 spin_lock_irqsave(&info
->lock
,flags
);
4008 spin_unlock_irqrestore(&info
->lock
,flags
);
4010 return info
->irq_occurred
;
4013 static int adapter_test(MGSLPC_INFO
*info
)
4015 if (!register_test(info
)) {
4016 info
->init_error
= DiagStatus_AddressFailure
;
4017 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4018 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
4022 if (!irq_test(info
)) {
4023 info
->init_error
= DiagStatus_IrqFailure
;
4024 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4025 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
4029 if (debug_level
>= DEBUG_LEVEL_INFO
)
4030 printk("%s(%d):device %s passed diagnostics\n",
4031 __FILE__
,__LINE__
,info
->device_name
);
4035 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
4040 printk("%s tx data:\n",info
->device_name
);
4042 printk("%s rx data:\n",info
->device_name
);
4050 for(i
=0;i
<linecount
;i
++)
4051 printk("%02X ",(unsigned char)data
[i
]);
4054 for(i
=0;i
<linecount
;i
++) {
4055 if (data
[i
]>=040 && data
[i
]<=0176)
4056 printk("%c",data
[i
]);
4067 /* HDLC frame time out
4068 * update stats and do tx completion processing
4070 static void tx_timeout(unsigned long context
)
4072 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
4073 unsigned long flags
;
4075 if ( debug_level
>= DEBUG_LEVEL_INFO
)
4076 printk( "%s(%d):tx_timeout(%s)\n",
4077 __FILE__
,__LINE__
,info
->device_name
);
4078 if(info
->tx_active
&&
4079 info
->params
.mode
== MGSL_MODE_HDLC
) {
4080 info
->icount
.txtimeout
++;
4082 spin_lock_irqsave(&info
->lock
,flags
);
4083 info
->tx_active
= false;
4084 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
4086 spin_unlock_irqrestore(&info
->lock
,flags
);
4088 #if SYNCLINK_GENERIC_HDLC
4090 hdlcdev_tx_done(info
);
4096 #if SYNCLINK_GENERIC_HDLC
4099 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4100 * set encoding and frame check sequence (FCS) options
4102 * dev pointer to network device structure
4103 * encoding serial encoding setting
4104 * parity FCS setting
4106 * returns 0 if success, otherwise error code
4108 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
4109 unsigned short parity
)
4111 MGSLPC_INFO
*info
= dev_to_port(dev
);
4112 unsigned char new_encoding
;
4113 unsigned short new_crctype
;
4115 /* return error if TTY interface open */
4121 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
4122 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
4123 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
4124 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
4125 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
4126 default: return -EINVAL
;
4131 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
4132 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
4133 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
4134 default: return -EINVAL
;
4137 info
->params
.encoding
= new_encoding
;
4138 info
->params
.crc_type
= new_crctype
;
4140 /* if network interface up, reprogram hardware */
4142 mgslpc_program_hw(info
);
4148 * called by generic HDLC layer to send frame
4150 * skb socket buffer containing HDLC frame
4151 * dev pointer to network device structure
4153 * returns 0 if success, otherwise error code
4155 static int hdlcdev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4157 MGSLPC_INFO
*info
= dev_to_port(dev
);
4158 struct net_device_stats
*stats
= hdlc_stats(dev
);
4159 unsigned long flags
;
4161 if (debug_level
>= DEBUG_LEVEL_INFO
)
4162 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
4164 /* stop sending until this frame completes */
4165 netif_stop_queue(dev
);
4167 /* copy data to device buffers */
4168 skb_copy_from_linear_data(skb
, info
->tx_buf
, skb
->len
);
4170 info
->tx_put
= info
->tx_count
= skb
->len
;
4172 /* update network statistics */
4173 stats
->tx_packets
++;
4174 stats
->tx_bytes
+= skb
->len
;
4176 /* done with socket buffer, so free it */
4179 /* save start time for transmit timeout detection */
4180 dev
->trans_start
= jiffies
;
4182 /* start hardware transmitter if necessary */
4183 spin_lock_irqsave(&info
->lock
,flags
);
4184 if (!info
->tx_active
)
4186 spin_unlock_irqrestore(&info
->lock
,flags
);
4192 * called by network layer when interface enabled
4193 * claim resources and initialize hardware
4195 * dev pointer to network device structure
4197 * returns 0 if success, otherwise error code
4199 static int hdlcdev_open(struct net_device
*dev
)
4201 MGSLPC_INFO
*info
= dev_to_port(dev
);
4203 unsigned long flags
;
4205 if (debug_level
>= DEBUG_LEVEL_INFO
)
4206 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
4208 /* generic HDLC layer open processing */
4209 if ((rc
= hdlc_open(dev
)))
4212 /* arbitrate between network and tty opens */
4213 spin_lock_irqsave(&info
->netlock
, flags
);
4214 if (info
->count
!= 0 || info
->netcount
!= 0) {
4215 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
4216 spin_unlock_irqrestore(&info
->netlock
, flags
);
4220 spin_unlock_irqrestore(&info
->netlock
, flags
);
4222 /* claim resources and init adapter */
4223 if ((rc
= startup(info
)) != 0) {
4224 spin_lock_irqsave(&info
->netlock
, flags
);
4226 spin_unlock_irqrestore(&info
->netlock
, flags
);
4230 /* assert DTR and RTS, apply hardware settings */
4231 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4232 mgslpc_program_hw(info
);
4234 /* enable network layer transmit */
4235 dev
->trans_start
= jiffies
;
4236 netif_start_queue(dev
);
4238 /* inform generic HDLC layer of current DCD status */
4239 spin_lock_irqsave(&info
->lock
, flags
);
4241 spin_unlock_irqrestore(&info
->lock
, flags
);
4242 if (info
->serial_signals
& SerialSignal_DCD
)
4243 netif_carrier_on(dev
);
4245 netif_carrier_off(dev
);
4250 * called by network layer when interface is disabled
4251 * shutdown hardware and release resources
4253 * dev pointer to network device structure
4255 * returns 0 if success, otherwise error code
4257 static int hdlcdev_close(struct net_device
*dev
)
4259 MGSLPC_INFO
*info
= dev_to_port(dev
);
4260 unsigned long flags
;
4262 if (debug_level
>= DEBUG_LEVEL_INFO
)
4263 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4265 netif_stop_queue(dev
);
4267 /* shutdown adapter and release resources */
4272 spin_lock_irqsave(&info
->netlock
, flags
);
4274 spin_unlock_irqrestore(&info
->netlock
, flags
);
4280 * called by network layer to process IOCTL call to network device
4282 * dev pointer to network device structure
4283 * ifr pointer to network interface request structure
4284 * cmd IOCTL command code
4286 * returns 0 if success, otherwise error code
4288 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4290 const size_t size
= sizeof(sync_serial_settings
);
4291 sync_serial_settings new_line
;
4292 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4293 MGSLPC_INFO
*info
= dev_to_port(dev
);
4296 if (debug_level
>= DEBUG_LEVEL_INFO
)
4297 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4299 /* return error if TTY interface open */
4303 if (cmd
!= SIOCWANDEV
)
4304 return hdlc_ioctl(dev
, ifr
, cmd
);
4306 switch(ifr
->ifr_settings
.type
) {
4307 case IF_GET_IFACE
: /* return current sync_serial_settings */
4309 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4310 if (ifr
->ifr_settings
.size
< size
) {
4311 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4315 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4316 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4317 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4318 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4321 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4322 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4323 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4324 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4325 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4328 new_line
.clock_rate
= info
->params
.clock_speed
;
4329 new_line
.loopback
= info
->params
.loopback
? 1:0;
4331 if (copy_to_user(line
, &new_line
, size
))
4335 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4337 if(!capable(CAP_NET_ADMIN
))
4339 if (copy_from_user(&new_line
, line
, size
))
4342 switch (new_line
.clock_type
)
4344 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4345 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4346 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4347 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4348 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4349 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4350 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4351 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4352 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4353 default: return -EINVAL
;
4356 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4359 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4360 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4361 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4362 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4363 info
->params
.flags
|= flags
;
4365 info
->params
.loopback
= new_line
.loopback
;
4367 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4368 info
->params
.clock_speed
= new_line
.clock_rate
;
4370 info
->params
.clock_speed
= 0;
4372 /* if network interface up, reprogram hardware */
4374 mgslpc_program_hw(info
);
4378 return hdlc_ioctl(dev
, ifr
, cmd
);
4383 * called by network layer when transmit timeout is detected
4385 * dev pointer to network device structure
4387 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4389 MGSLPC_INFO
*info
= dev_to_port(dev
);
4390 struct net_device_stats
*stats
= hdlc_stats(dev
);
4391 unsigned long flags
;
4393 if (debug_level
>= DEBUG_LEVEL_INFO
)
4394 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4397 stats
->tx_aborted_errors
++;
4399 spin_lock_irqsave(&info
->lock
,flags
);
4401 spin_unlock_irqrestore(&info
->lock
,flags
);
4403 netif_wake_queue(dev
);
4407 * called by device driver when transmit completes
4408 * reenable network layer transmit if stopped
4410 * info pointer to device instance information
4412 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4414 if (netif_queue_stopped(info
->netdev
))
4415 netif_wake_queue(info
->netdev
);
4419 * called by device driver when frame received
4420 * pass frame to network layer
4422 * info pointer to device instance information
4423 * buf pointer to buffer contianing frame data
4424 * size count of data bytes in buf
4426 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4428 struct sk_buff
*skb
= dev_alloc_skb(size
);
4429 struct net_device
*dev
= info
->netdev
;
4430 struct net_device_stats
*stats
= hdlc_stats(dev
);
4432 if (debug_level
>= DEBUG_LEVEL_INFO
)
4433 printk("hdlcdev_rx(%s)\n",dev
->name
);
4436 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4437 stats
->rx_dropped
++;
4441 memcpy(skb_put(skb
, size
),buf
,size
);
4443 skb
->protocol
= hdlc_type_trans(skb
, info
->netdev
);
4445 stats
->rx_packets
++;
4446 stats
->rx_bytes
+= size
;
4450 info
->netdev
->last_rx
= jiffies
;
4454 * called by device driver when adding device instance
4455 * do generic HDLC initialization
4457 * info pointer to device instance information
4459 * returns 0 if success, otherwise error code
4461 static int hdlcdev_init(MGSLPC_INFO
*info
)
4464 struct net_device
*dev
;
4467 /* allocate and initialize network and HDLC layer objects */
4469 if (!(dev
= alloc_hdlcdev(info
))) {
4470 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4474 /* for network layer reporting purposes only */
4475 dev
->base_addr
= info
->io_base
;
4476 dev
->irq
= info
->irq_level
;
4478 /* network layer callbacks and settings */
4479 dev
->do_ioctl
= hdlcdev_ioctl
;
4480 dev
->open
= hdlcdev_open
;
4481 dev
->stop
= hdlcdev_close
;
4482 dev
->tx_timeout
= hdlcdev_tx_timeout
;
4483 dev
->watchdog_timeo
= 10*HZ
;
4484 dev
->tx_queue_len
= 50;
4486 /* generic HDLC layer callbacks and settings */
4487 hdlc
= dev_to_hdlc(dev
);
4488 hdlc
->attach
= hdlcdev_attach
;
4489 hdlc
->xmit
= hdlcdev_xmit
;
4491 /* register objects with HDLC layer */
4492 if ((rc
= register_hdlc_device(dev
))) {
4493 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4503 * called by device driver when removing device instance
4504 * do generic HDLC cleanup
4506 * info pointer to device instance information
4508 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4510 unregister_hdlc_device(info
->netdev
);
4511 free_netdev(info
->netdev
);
4512 info
->netdev
= NULL
;
4515 #endif /* CONFIG_HDLC */