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/config.h>
39 #include <linux/module.h>
40 #include <linux/errno.h>
41 #include <linux/signal.h>
42 #include <linux/sched.h>
43 #include <linux/timer.h>
44 #include <linux/time.h>
45 #include <linux/interrupt.h>
46 #include <linux/pci.h>
47 #include <linux/tty.h>
48 #include <linux/tty_flip.h>
49 #include <linux/serial.h>
50 #include <linux/major.h>
51 #include <linux/string.h>
52 #include <linux/fcntl.h>
53 #include <linux/ptrace.h>
54 #include <linux/ioport.h>
56 #include <linux/slab.h>
57 #include <linux/netdevice.h>
58 #include <linux/vmalloc.h>
59 #include <linux/init.h>
60 #include <asm/serial.h>
61 #include <linux/delay.h>
62 #include <linux/ioctl.h>
64 #include <asm/system.h>
68 #include <linux/bitops.h>
69 #include <asm/types.h>
70 #include <linux/termios.h>
71 #include <linux/workqueue.h>
72 #include <linux/hdlc.h>
74 #include <pcmcia/cs_types.h>
75 #include <pcmcia/cs.h>
76 #include <pcmcia/cistpl.h>
77 #include <pcmcia/cisreg.h>
78 #include <pcmcia/ds.h>
80 #ifdef CONFIG_HDLC_MODULE
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 #include "linux/synclink.h"
93 static MGSL_PARAMS default_params
= {
94 MGSL_MODE_HDLC
, /* unsigned long mode */
95 0, /* unsigned char loopback; */
96 HDLC_FLAG_UNDERRUN_ABORT15
, /* unsigned short flags; */
97 HDLC_ENCODING_NRZI_SPACE
, /* unsigned char encoding; */
98 0, /* unsigned long clock_speed; */
99 0xff, /* unsigned char addr_filter; */
100 HDLC_CRC_16_CCITT
, /* unsigned short crc_type; */
101 HDLC_PREAMBLE_LENGTH_8BITS
, /* unsigned char preamble_length; */
102 HDLC_PREAMBLE_PATTERN_NONE
, /* unsigned char preamble; */
103 9600, /* unsigned long data_rate; */
104 8, /* unsigned char data_bits; */
105 1, /* unsigned char stop_bits; */
106 ASYNC_PARITY_NONE
/* unsigned char parity; */
112 unsigned char status
;
116 /* The queue of BH actions to be performed */
119 #define BH_TRANSMIT 2
122 #define IO_PIN_SHUTDOWN_LIMIT 100
124 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
126 struct _input_signal_events
{
139 * Device instance data structure
142 typedef struct _mgslpc_info
{
143 void *if_ptr
; /* General purpose pointer (used by SPPP) */
146 int count
; /* count of opens */
148 unsigned short close_delay
;
149 unsigned short closing_wait
; /* time to wait before closing */
151 struct mgsl_icount icount
;
153 struct tty_struct
*tty
;
155 int x_char
; /* xon/xoff character */
156 int blocked_open
; /* # of blocked opens */
157 unsigned char read_status_mask
;
158 unsigned char ignore_status_mask
;
160 unsigned char *tx_buf
;
165 /* circular list of fixed length rx buffers */
167 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
168 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
169 int rx_put
; /* index of next empty rx buffer */
170 int rx_get
; /* index of next full rx buffer */
171 int rx_buf_size
; /* size in bytes of single rx buffer */
172 int rx_buf_count
; /* total number of rx buffers */
173 int rx_frame_count
; /* number of full rx buffers */
175 wait_queue_head_t open_wait
;
176 wait_queue_head_t close_wait
;
178 wait_queue_head_t status_event_wait_q
;
179 wait_queue_head_t event_wait_q
;
180 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
181 struct _mgslpc_info
*next_device
; /* device list link */
183 unsigned short imra_value
;
184 unsigned short imrb_value
;
185 unsigned char pim_value
;
188 struct work_struct task
; /* task structure for scheduling bh */
197 int dcd_chkcount
; /* check counts to prevent */
198 int cts_chkcount
; /* too many IRQs if a signal */
199 int dsr_chkcount
; /* is floating */
210 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
212 char device_name
[25]; /* device instance name */
214 unsigned int io_base
; /* base I/O address of adapter */
215 unsigned int irq_level
;
217 MGSL_PARAMS params
; /* communications parameters */
219 unsigned char serial_signals
; /* current serial signal states */
221 char irq_occurred
; /* for diagnostics use */
223 unsigned int init_error
; /* startup error (DIAGS) */
225 char flag_buf
[MAX_ASYNC_BUFFER_SIZE
];
226 BOOLEAN drop_rts_on_tx_done
;
228 struct _input_signal_events input_signal_events
;
231 struct pcmcia_device
*p_dev
;
235 /* SPPP/Cisco HDLC device parts */
241 struct net_device
*netdev
;
246 #define MGSLPC_MAGIC 0x5402
249 * The size of the serial xmit buffer is 1 page, or 4096 bytes
251 #define TXBUFSIZE 4096
254 #define CHA 0x00 /* channel A offset */
255 #define CHB 0x40 /* channel B offset */
258 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
305 #define IRQ_BREAK_ON BIT15 // rx break detected
306 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
307 #define IRQ_ALLSENT BIT13 // all sent
308 #define IRQ_UNDERRUN BIT12 // transmit data underrun
309 #define IRQ_TIMER BIT11 // timer interrupt
310 #define IRQ_CTS BIT10 // CTS status change
311 #define IRQ_TXREPEAT BIT9 // tx message repeat
312 #define IRQ_TXFIFO BIT8 // transmit pool ready
313 #define IRQ_RXEOM BIT7 // receive message end
314 #define IRQ_EXITHUNT BIT6 // receive frame start
315 #define IRQ_RXTIME BIT6 // rx char timeout
316 #define IRQ_DCD BIT2 // carrier detect status change
317 #define IRQ_OVERRUN BIT1 // receive frame overflow
318 #define IRQ_RXFIFO BIT0 // receive pool full
322 #define XFW BIT6 // transmit FIFO write enable
323 #define CEC BIT2 // command executing
324 #define CTS BIT1 // CTS state
329 #define PVR_AUTOCTS BIT3
330 #define PVR_RS232 0x20 /* 0010b */
331 #define PVR_V35 0xe0 /* 1110b */
332 #define PVR_RS422 0x40 /* 0100b */
334 /* Register access functions */
336 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
337 #define read_reg(info, reg) inb((info)->io_base + (reg))
339 #define read_reg16(info, reg) inw((info)->io_base + (reg))
340 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
342 #define set_reg_bits(info, reg, mask) \
343 write_reg(info, (reg), \
344 (unsigned char) (read_reg(info, (reg)) | (mask)))
345 #define clear_reg_bits(info, reg, mask) \
346 write_reg(info, (reg), \
347 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
349 * interrupt enable/disable routines
351 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
353 if (channel
== CHA
) {
354 info
->imra_value
|= mask
;
355 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
357 info
->imrb_value
|= mask
;
358 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
361 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
363 if (channel
== CHA
) {
364 info
->imra_value
&= ~mask
;
365 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
367 info
->imrb_value
&= ~mask
;
368 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
372 #define port_irq_disable(info, mask) \
373 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
375 #define port_irq_enable(info, mask) \
376 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
378 static void rx_start(MGSLPC_INFO
*info
);
379 static void rx_stop(MGSLPC_INFO
*info
);
381 static void tx_start(MGSLPC_INFO
*info
);
382 static void tx_stop(MGSLPC_INFO
*info
);
383 static void tx_set_idle(MGSLPC_INFO
*info
);
385 static void get_signals(MGSLPC_INFO
*info
);
386 static void set_signals(MGSLPC_INFO
*info
);
388 static void reset_device(MGSLPC_INFO
*info
);
390 static void hdlc_mode(MGSLPC_INFO
*info
);
391 static void async_mode(MGSLPC_INFO
*info
);
393 static void tx_timeout(unsigned long context
);
395 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
);
398 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
399 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
400 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
401 static int hdlcdev_init(MGSLPC_INFO
*info
);
402 static void hdlcdev_exit(MGSLPC_INFO
*info
);
405 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
407 static BOOLEAN
register_test(MGSLPC_INFO
*info
);
408 static BOOLEAN
irq_test(MGSLPC_INFO
*info
);
409 static int adapter_test(MGSLPC_INFO
*info
);
411 static int claim_resources(MGSLPC_INFO
*info
);
412 static void release_resources(MGSLPC_INFO
*info
);
413 static void mgslpc_add_device(MGSLPC_INFO
*info
);
414 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
416 static int rx_get_frame(MGSLPC_INFO
*info
);
417 static void rx_reset_buffers(MGSLPC_INFO
*info
);
418 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
419 static void rx_free_buffers(MGSLPC_INFO
*info
);
421 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
, struct pt_regs
* regs
);
424 * Bottom half interrupt handlers
426 static void bh_handler(void* Context
);
427 static void bh_transmit(MGSLPC_INFO
*info
);
428 static void bh_status(MGSLPC_INFO
*info
);
433 static int tiocmget(struct tty_struct
*tty
, struct file
*file
);
434 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
435 unsigned int set
, unsigned int clear
);
436 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
437 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
438 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
);
439 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
440 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
441 static int set_txenable(MGSLPC_INFO
*info
, int enable
);
442 static int tx_abort(MGSLPC_INFO
*info
);
443 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
444 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
446 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
447 static int mgslpc_device_count
= 0;
450 * Set this param to non-zero to load eax with the
451 * .text section address and breakpoint on module load.
452 * This is useful for use with gdb and add-symbol-file command.
454 static int break_on_load
=0;
457 * Driver major number, defaults to zero to get auto
458 * assigned major number. May be forced as module parameter.
460 static int ttymajor
=0;
462 static int debug_level
= 0;
463 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
464 static int dosyncppp
[MAX_DEVICE_COUNT
] = {1,1,1,1};
466 module_param(break_on_load
, bool, 0);
467 module_param(ttymajor
, int, 0);
468 module_param(debug_level
, int, 0);
469 module_param_array(maxframe
, int, NULL
, 0);
470 module_param_array(dosyncppp
, int, NULL
, 0);
472 MODULE_LICENSE("GPL");
474 static char *driver_name
= "SyncLink PC Card driver";
475 static char *driver_version
= "$Revision: 4.34 $";
477 static struct tty_driver
*serial_driver
;
479 /* number of characters left in xmit buffer before we ask for more */
480 #define WAKEUP_CHARS 256
482 static void mgslpc_change_params(MGSLPC_INFO
*info
);
483 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
485 /* PCMCIA prototypes */
487 static int mgslpc_config(struct pcmcia_device
*link
);
488 static void mgslpc_release(u_long arg
);
489 static void mgslpc_detach(struct pcmcia_device
*p_dev
);
492 * 1st function defined in .text section. Calling this function in
493 * init_module() followed by a breakpoint allows a remote debugger
494 * (gdb) to get the .text address for the add-symbol-file command.
495 * This allows remote debugging of dynamically loadable modules.
497 static void* mgslpc_get_text_ptr(void)
499 return mgslpc_get_text_ptr
;
503 * line discipline callback wrappers
505 * The wrappers maintain line discipline references
506 * while calling into the line discipline.
508 * ldisc_flush_buffer - flush line discipline receive buffers
509 * ldisc_receive_buf - pass receive data to line discipline
512 static void ldisc_flush_buffer(struct tty_struct
*tty
)
514 struct tty_ldisc
*ld
= tty_ldisc_ref(tty
);
516 if (ld
->flush_buffer
)
517 ld
->flush_buffer(tty
);
522 static void ldisc_receive_buf(struct tty_struct
*tty
,
523 const __u8
*data
, char *flags
, int count
)
525 struct tty_ldisc
*ld
;
528 ld
= tty_ldisc_ref(tty
);
531 ld
->receive_buf(tty
, data
, flags
, count
);
536 static int mgslpc_probe(struct pcmcia_device
*link
)
541 if (debug_level
>= DEBUG_LEVEL_INFO
)
542 printk("mgslpc_attach\n");
544 info
= (MGSLPC_INFO
*)kmalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
546 printk("Error can't allocate device instance data\n");
550 memset(info
, 0, sizeof(MGSLPC_INFO
));
551 info
->magic
= MGSLPC_MAGIC
;
552 INIT_WORK(&info
->task
, bh_handler
, info
);
553 info
->max_frame_size
= 4096;
554 info
->close_delay
= 5*HZ
/10;
555 info
->closing_wait
= 30*HZ
;
556 init_waitqueue_head(&info
->open_wait
);
557 init_waitqueue_head(&info
->close_wait
);
558 init_waitqueue_head(&info
->status_event_wait_q
);
559 init_waitqueue_head(&info
->event_wait_q
);
560 spin_lock_init(&info
->lock
);
561 spin_lock_init(&info
->netlock
);
562 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
563 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
564 info
->imra_value
= 0xffff;
565 info
->imrb_value
= 0xffff;
566 info
->pim_value
= 0xff;
571 /* Initialize the struct pcmcia_device structure */
573 /* Interrupt setup */
574 link
->irq
.Attributes
= IRQ_TYPE_EXCLUSIVE
;
575 link
->irq
.IRQInfo1
= IRQ_LEVEL_ID
;
576 link
->irq
.Handler
= NULL
;
578 link
->conf
.Attributes
= 0;
579 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
581 ret
= mgslpc_config(link
);
585 mgslpc_add_device(info
);
590 /* Card has been inserted.
593 #define CS_CHECK(fn, ret) \
594 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
596 static int mgslpc_config(struct pcmcia_device
*link
)
598 MGSLPC_INFO
*info
= link
->priv
;
601 int last_fn
, last_ret
;
603 cistpl_cftable_entry_t dflt
= { 0 };
604 cistpl_cftable_entry_t
*cfg
;
606 if (debug_level
>= DEBUG_LEVEL_INFO
)
607 printk("mgslpc_config(0x%p)\n", link
);
609 /* read CONFIG tuple to find its configuration registers */
610 tuple
.DesiredTuple
= CISTPL_CONFIG
;
611 tuple
.Attributes
= 0;
612 tuple
.TupleData
= buf
;
613 tuple
.TupleDataMax
= sizeof(buf
);
614 tuple
.TupleOffset
= 0;
615 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(link
, &tuple
));
616 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(link
, &tuple
));
617 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(link
, &tuple
, &parse
));
618 link
->conf
.ConfigBase
= parse
.config
.base
;
619 link
->conf
.Present
= parse
.config
.rmask
[0];
621 /* get CIS configuration entry */
623 tuple
.DesiredTuple
= CISTPL_CFTABLE_ENTRY
;
624 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(link
, &tuple
));
626 cfg
= &(parse
.cftable_entry
);
627 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(link
, &tuple
));
628 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(link
, &tuple
, &parse
));
630 if (cfg
->flags
& CISTPL_CFTABLE_DEFAULT
) dflt
= *cfg
;
634 link
->conf
.ConfigIndex
= cfg
->index
;
635 link
->conf
.Attributes
|= CONF_ENABLE_IRQ
;
637 /* IO window settings */
638 link
->io
.NumPorts1
= 0;
639 if ((cfg
->io
.nwin
> 0) || (dflt
.io
.nwin
> 0)) {
640 cistpl_io_t
*io
= (cfg
->io
.nwin
) ? &cfg
->io
: &dflt
.io
;
641 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_AUTO
;
642 if (!(io
->flags
& CISTPL_IO_8BIT
))
643 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_16
;
644 if (!(io
->flags
& CISTPL_IO_16BIT
))
645 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_8
;
646 link
->io
.IOAddrLines
= io
->flags
& CISTPL_IO_LINES_MASK
;
647 link
->io
.BasePort1
= io
->win
[0].base
;
648 link
->io
.NumPorts1
= io
->win
[0].len
;
649 CS_CHECK(RequestIO
, pcmcia_request_io(link
, &link
->io
));
652 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
653 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
654 link
->conf
.ConfigIndex
= 8;
655 link
->conf
.Present
= PRESENT_OPTION
;
657 link
->irq
.Attributes
|= IRQ_HANDLE_PRESENT
;
658 link
->irq
.Handler
= mgslpc_isr
;
659 link
->irq
.Instance
= info
;
660 CS_CHECK(RequestIRQ
, pcmcia_request_irq(link
, &link
->irq
));
662 CS_CHECK(RequestConfiguration
, pcmcia_request_configuration(link
, &link
->conf
));
664 info
->io_base
= link
->io
.BasePort1
;
665 info
->irq_level
= link
->irq
.AssignedIRQ
;
667 /* add to linked list of devices */
668 sprintf(info
->node
.dev_name
, "mgslpc0");
669 info
->node
.major
= info
->node
.minor
= 0;
670 link
->dev_node
= &info
->node
;
672 printk(KERN_INFO
"%s: index 0x%02x:",
673 info
->node
.dev_name
, link
->conf
.ConfigIndex
);
674 if (link
->conf
.Attributes
& CONF_ENABLE_IRQ
)
675 printk(", irq %d", link
->irq
.AssignedIRQ
);
676 if (link
->io
.NumPorts1
)
677 printk(", io 0x%04x-0x%04x", link
->io
.BasePort1
,
678 link
->io
.BasePort1
+link
->io
.NumPorts1
-1);
683 cs_error(link
, last_fn
, last_ret
);
684 mgslpc_release((u_long
)link
);
688 /* Card has been removed.
689 * Unregister device and release PCMCIA configuration.
690 * If device is open, postpone until it is closed.
692 static void mgslpc_release(u_long arg
)
694 struct pcmcia_device
*link
= (struct pcmcia_device
*)arg
;
696 if (debug_level
>= DEBUG_LEVEL_INFO
)
697 printk("mgslpc_release(0x%p)\n", link
);
699 pcmcia_disable_device(link
);
702 static void mgslpc_detach(struct pcmcia_device
*link
)
704 if (debug_level
>= DEBUG_LEVEL_INFO
)
705 printk("mgslpc_detach(0x%p)\n", link
);
707 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
708 mgslpc_release((u_long
)link
);
710 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
713 static int mgslpc_suspend(struct pcmcia_device
*link
)
715 MGSLPC_INFO
*info
= link
->priv
;
722 static int mgslpc_resume(struct pcmcia_device
*link
)
724 MGSLPC_INFO
*info
= link
->priv
;
732 static inline int mgslpc_paranoia_check(MGSLPC_INFO
*info
,
733 char *name
, const char *routine
)
735 #ifdef MGSLPC_PARANOIA_CHECK
736 static const char *badmagic
=
737 "Warning: bad magic number for mgsl struct (%s) in %s\n";
738 static const char *badinfo
=
739 "Warning: null mgslpc_info for (%s) in %s\n";
742 printk(badinfo
, name
, routine
);
745 if (info
->magic
!= MGSLPC_MAGIC
) {
746 printk(badmagic
, name
, routine
);
757 #define CMD_RXFIFO BIT7 // release current rx FIFO
758 #define CMD_RXRESET BIT6 // receiver reset
759 #define CMD_RXFIFO_READ BIT5
760 #define CMD_START_TIMER BIT4
761 #define CMD_TXFIFO BIT3 // release current tx FIFO
762 #define CMD_TXEOM BIT1 // transmit end message
763 #define CMD_TXRESET BIT0 // transmit reset
765 static BOOLEAN
wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
768 /* wait for command completion */
769 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
777 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
779 wait_command_complete(info
, channel
);
780 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
783 static void tx_pause(struct tty_struct
*tty
)
785 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
788 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
790 if (debug_level
>= DEBUG_LEVEL_INFO
)
791 printk("tx_pause(%s)\n",info
->device_name
);
793 spin_lock_irqsave(&info
->lock
,flags
);
794 if (info
->tx_enabled
)
796 spin_unlock_irqrestore(&info
->lock
,flags
);
799 static void tx_release(struct tty_struct
*tty
)
801 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
804 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
806 if (debug_level
>= DEBUG_LEVEL_INFO
)
807 printk("tx_release(%s)\n",info
->device_name
);
809 spin_lock_irqsave(&info
->lock
,flags
);
810 if (!info
->tx_enabled
)
812 spin_unlock_irqrestore(&info
->lock
,flags
);
815 /* Return next bottom half action to perform.
816 * or 0 if nothing to do.
818 static int bh_action(MGSLPC_INFO
*info
)
823 spin_lock_irqsave(&info
->lock
,flags
);
825 if (info
->pending_bh
& BH_RECEIVE
) {
826 info
->pending_bh
&= ~BH_RECEIVE
;
828 } else if (info
->pending_bh
& BH_TRANSMIT
) {
829 info
->pending_bh
&= ~BH_TRANSMIT
;
831 } else if (info
->pending_bh
& BH_STATUS
) {
832 info
->pending_bh
&= ~BH_STATUS
;
837 /* Mark BH routine as complete */
838 info
->bh_running
= 0;
839 info
->bh_requested
= 0;
842 spin_unlock_irqrestore(&info
->lock
,flags
);
847 static void bh_handler(void* Context
)
849 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)Context
;
855 if (debug_level
>= DEBUG_LEVEL_BH
)
856 printk( "%s(%d):bh_handler(%s) entry\n",
857 __FILE__
,__LINE__
,info
->device_name
);
859 info
->bh_running
= 1;
861 while((action
= bh_action(info
)) != 0) {
863 /* Process work item */
864 if ( debug_level
>= DEBUG_LEVEL_BH
)
865 printk( "%s(%d):bh_handler() work item action=%d\n",
866 __FILE__
,__LINE__
,action
);
871 while(rx_get_frame(info
));
880 /* unknown work item ID */
881 printk("Unknown work item ID=%08X!\n", action
);
886 if (debug_level
>= DEBUG_LEVEL_BH
)
887 printk( "%s(%d):bh_handler(%s) exit\n",
888 __FILE__
,__LINE__
,info
->device_name
);
891 static void bh_transmit(MGSLPC_INFO
*info
)
893 struct tty_struct
*tty
= info
->tty
;
894 if (debug_level
>= DEBUG_LEVEL_BH
)
895 printk("bh_transmit() entry on %s\n", info
->device_name
);
899 wake_up_interruptible(&tty
->write_wait
);
903 static void bh_status(MGSLPC_INFO
*info
)
905 info
->ri_chkcount
= 0;
906 info
->dsr_chkcount
= 0;
907 info
->dcd_chkcount
= 0;
908 info
->cts_chkcount
= 0;
911 /* eom: non-zero = end of frame */
912 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
914 unsigned char data
[2];
915 unsigned char fifo_count
, read_count
, i
;
916 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
918 if (debug_level
>= DEBUG_LEVEL_ISR
)
919 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__
,__LINE__
,eom
);
921 if (!info
->rx_enabled
)
924 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
925 /* no more free buffers */
926 issue_command(info
, CHA
, CMD_RXRESET
);
927 info
->pending_bh
|= BH_RECEIVE
;
928 info
->rx_overflow
= 1;
929 info
->icount
.buf_overrun
++;
934 /* end of frame, get FIFO count from RBCL register */
935 if (!(fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f)))
941 if (fifo_count
== 1) {
943 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
946 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
948 fifo_count
-= read_count
;
949 if (!fifo_count
&& eom
)
950 buf
->status
= data
[--read_count
];
952 for (i
= 0; i
< read_count
; i
++) {
953 if (buf
->count
>= info
->max_frame_size
) {
954 /* frame too large, reset receiver and reset current buffer */
955 issue_command(info
, CHA
, CMD_RXRESET
);
959 *(buf
->data
+ buf
->count
) = data
[i
];
962 } while (fifo_count
);
965 info
->pending_bh
|= BH_RECEIVE
;
966 info
->rx_frame_count
++;
968 if (info
->rx_put
>= info
->rx_buf_count
)
971 issue_command(info
, CHA
, CMD_RXFIFO
);
974 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
)
976 unsigned char data
, status
, flag
;
979 struct tty_struct
*tty
= info
->tty
;
980 struct mgsl_icount
*icount
= &info
->icount
;
983 /* early termination, get FIFO count from RBCL register */
984 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
986 /* Zero fifo count could mean 0 or 32 bytes available.
987 * If BIT5 of STAR is set then at least 1 byte is available.
989 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
994 tty_buffer_request_room(tty
, fifo_count
);
995 /* Flush received async data to receive data buffer. */
997 data
= read_reg(info
, CHA
+ RXFIFO
);
998 status
= read_reg(info
, CHA
+ RXFIFO
);
1004 // if no frameing/crc error then save data
1005 // BIT7:parity error
1006 // BIT6:framing error
1008 if (status
& (BIT7
+ BIT6
)) {
1014 /* discard char if tty control flags say so */
1015 if (status
& info
->ignore_status_mask
)
1018 status
&= info
->read_status_mask
;
1022 else if (status
& BIT6
)
1025 work
+= tty_insert_flip_char(tty
, data
, flag
);
1027 issue_command(info
, CHA
, CMD_RXFIFO
);
1029 if (debug_level
>= DEBUG_LEVEL_ISR
) {
1030 printk("%s(%d):rx_ready_async",
1032 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1033 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
1034 icount
->parity
,icount
->frame
,icount
->overrun
);
1038 tty_flip_buffer_push(tty
);
1042 static void tx_done(MGSLPC_INFO
*info
)
1044 if (!info
->tx_active
)
1047 info
->tx_active
= 0;
1048 info
->tx_aborting
= 0;
1050 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
1053 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1054 del_timer(&info
->tx_timer
);
1056 if (info
->drop_rts_on_tx_done
) {
1058 if (info
->serial_signals
& SerialSignal_RTS
) {
1059 info
->serial_signals
&= ~SerialSignal_RTS
;
1062 info
->drop_rts_on_tx_done
= 0;
1067 hdlcdev_tx_done(info
);
1071 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1075 info
->pending_bh
|= BH_TRANSMIT
;
1079 static void tx_ready(MGSLPC_INFO
*info
)
1081 unsigned char fifo_count
= 32;
1084 if (debug_level
>= DEBUG_LEVEL_ISR
)
1085 printk("%s(%d):tx_ready(%s)\n", __FILE__
,__LINE__
,info
->device_name
);
1087 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1088 if (!info
->tx_active
)
1091 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1095 if (!info
->tx_count
)
1096 info
->tx_active
= 0;
1099 if (!info
->tx_count
)
1102 while (info
->tx_count
&& fifo_count
) {
1103 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1106 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1108 write_reg16(info
, CHA
+ TXFIFO
,
1109 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1111 info
->tx_count
-= c
;
1112 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1116 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1117 if (info
->tx_count
< WAKEUP_CHARS
)
1118 info
->pending_bh
|= BH_TRANSMIT
;
1119 issue_command(info
, CHA
, CMD_TXFIFO
);
1122 issue_command(info
, CHA
, CMD_TXFIFO
);
1124 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1128 static void cts_change(MGSLPC_INFO
*info
)
1131 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1132 irq_disable(info
, CHB
, IRQ_CTS
);
1134 if (info
->serial_signals
& SerialSignal_CTS
)
1135 info
->input_signal_events
.cts_up
++;
1137 info
->input_signal_events
.cts_down
++;
1138 wake_up_interruptible(&info
->status_event_wait_q
);
1139 wake_up_interruptible(&info
->event_wait_q
);
1141 if (info
->flags
& ASYNC_CTS_FLOW
) {
1142 if (info
->tty
->hw_stopped
) {
1143 if (info
->serial_signals
& SerialSignal_CTS
) {
1144 if (debug_level
>= DEBUG_LEVEL_ISR
)
1145 printk("CTS tx start...");
1147 info
->tty
->hw_stopped
= 0;
1149 info
->pending_bh
|= BH_TRANSMIT
;
1153 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1154 if (debug_level
>= DEBUG_LEVEL_ISR
)
1155 printk("CTS tx stop...");
1157 info
->tty
->hw_stopped
= 1;
1162 info
->pending_bh
|= BH_STATUS
;
1165 static void dcd_change(MGSLPC_INFO
*info
)
1168 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1169 irq_disable(info
, CHB
, IRQ_DCD
);
1171 if (info
->serial_signals
& SerialSignal_DCD
) {
1172 info
->input_signal_events
.dcd_up
++;
1175 info
->input_signal_events
.dcd_down
++;
1178 hdlc_set_carrier(info
->serial_signals
& SerialSignal_DCD
, info
->netdev
);
1180 wake_up_interruptible(&info
->status_event_wait_q
);
1181 wake_up_interruptible(&info
->event_wait_q
);
1183 if (info
->flags
& ASYNC_CHECK_CD
) {
1184 if (debug_level
>= DEBUG_LEVEL_ISR
)
1185 printk("%s CD now %s...", info
->device_name
,
1186 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1187 if (info
->serial_signals
& SerialSignal_DCD
)
1188 wake_up_interruptible(&info
->open_wait
);
1190 if (debug_level
>= DEBUG_LEVEL_ISR
)
1191 printk("doing serial hangup...");
1193 tty_hangup(info
->tty
);
1196 info
->pending_bh
|= BH_STATUS
;
1199 static void dsr_change(MGSLPC_INFO
*info
)
1202 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1203 port_irq_disable(info
, PVR_DSR
);
1205 if (info
->serial_signals
& SerialSignal_DSR
)
1206 info
->input_signal_events
.dsr_up
++;
1208 info
->input_signal_events
.dsr_down
++;
1209 wake_up_interruptible(&info
->status_event_wait_q
);
1210 wake_up_interruptible(&info
->event_wait_q
);
1211 info
->pending_bh
|= BH_STATUS
;
1214 static void ri_change(MGSLPC_INFO
*info
)
1217 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1218 port_irq_disable(info
, PVR_RI
);
1220 if (info
->serial_signals
& SerialSignal_RI
)
1221 info
->input_signal_events
.ri_up
++;
1223 info
->input_signal_events
.ri_down
++;
1224 wake_up_interruptible(&info
->status_event_wait_q
);
1225 wake_up_interruptible(&info
->event_wait_q
);
1226 info
->pending_bh
|= BH_STATUS
;
1229 /* Interrupt service routine entry point.
1233 * irq interrupt number that caused interrupt
1234 * dev_id device ID supplied during interrupt registration
1235 * regs interrupted processor context
1237 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
, struct pt_regs
* regs
)
1239 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)dev_id
;
1241 unsigned char gis
, pis
;
1244 if (debug_level
>= DEBUG_LEVEL_ISR
)
1245 printk("mgslpc_isr(%d) entry.\n", irq
);
1249 if (!(info
->p_dev
->_locked
))
1252 spin_lock(&info
->lock
);
1254 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1255 if (debug_level
>= DEBUG_LEVEL_ISR
)
1256 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1258 if ((gis
& 0x70) || count
> 1000) {
1259 printk("synclink_cs:hardware failed or ejected\n");
1264 if (gis
& (BIT1
+ BIT0
)) {
1265 isr
= read_reg16(info
, CHB
+ ISR
);
1271 if (gis
& (BIT3
+ BIT2
))
1273 isr
= read_reg16(info
, CHA
+ ISR
);
1274 if (isr
& IRQ_TIMER
) {
1275 info
->irq_occurred
= 1;
1276 irq_disable(info
, CHA
, IRQ_TIMER
);
1280 if (isr
& IRQ_EXITHUNT
) {
1281 info
->icount
.exithunt
++;
1282 wake_up_interruptible(&info
->event_wait_q
);
1284 if (isr
& IRQ_BREAK_ON
) {
1286 if (info
->flags
& ASYNC_SAK
)
1289 if (isr
& IRQ_RXTIME
) {
1290 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1292 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1293 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1294 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1296 rx_ready_async(info
, isr
& IRQ_RXEOM
);
1300 if (isr
& IRQ_UNDERRUN
) {
1301 if (info
->tx_aborting
)
1302 info
->icount
.txabort
++;
1304 info
->icount
.txunder
++;
1307 else if (isr
& IRQ_ALLSENT
) {
1308 info
->icount
.txok
++;
1311 else if (isr
& IRQ_TXFIFO
)
1315 pis
= read_reg(info
, CHA
+ PIS
);
1323 /* Request bottom half processing if there's something
1324 * for it to do and the bh is not already running
1327 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1328 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1329 printk("%s(%d):%s queueing bh task.\n",
1330 __FILE__
,__LINE__
,info
->device_name
);
1331 schedule_work(&info
->task
);
1332 info
->bh_requested
= 1;
1335 spin_unlock(&info
->lock
);
1337 if (debug_level
>= DEBUG_LEVEL_ISR
)
1338 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1339 __FILE__
,__LINE__
,irq
);
1344 /* Initialize and start device.
1346 static int startup(MGSLPC_INFO
* info
)
1350 if (debug_level
>= DEBUG_LEVEL_INFO
)
1351 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1353 if (info
->flags
& ASYNC_INITIALIZED
)
1356 if (!info
->tx_buf
) {
1357 /* allocate a page of memory for a transmit buffer */
1358 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1359 if (!info
->tx_buf
) {
1360 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1361 __FILE__
,__LINE__
,info
->device_name
);
1366 info
->pending_bh
= 0;
1368 memset(&info
->icount
, 0, sizeof(info
->icount
));
1370 init_timer(&info
->tx_timer
);
1371 info
->tx_timer
.data
= (unsigned long)info
;
1372 info
->tx_timer
.function
= tx_timeout
;
1374 /* Allocate and claim adapter resources */
1375 retval
= claim_resources(info
);
1377 /* perform existance check and diagnostics */
1379 retval
= adapter_test(info
);
1382 if (capable(CAP_SYS_ADMIN
) && info
->tty
)
1383 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1384 release_resources(info
);
1388 /* program hardware for current parameters */
1389 mgslpc_change_params(info
);
1392 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1394 info
->flags
|= ASYNC_INITIALIZED
;
1399 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1401 static void shutdown(MGSLPC_INFO
* info
)
1403 unsigned long flags
;
1405 if (!(info
->flags
& ASYNC_INITIALIZED
))
1408 if (debug_level
>= DEBUG_LEVEL_INFO
)
1409 printk("%s(%d):mgslpc_shutdown(%s)\n",
1410 __FILE__
,__LINE__
, info
->device_name
);
1412 /* clear status wait queue because status changes */
1413 /* can't happen after shutting down the hardware */
1414 wake_up_interruptible(&info
->status_event_wait_q
);
1415 wake_up_interruptible(&info
->event_wait_q
);
1417 del_timer(&info
->tx_timer
);
1420 free_page((unsigned long) info
->tx_buf
);
1421 info
->tx_buf
= NULL
;
1424 spin_lock_irqsave(&info
->lock
,flags
);
1429 /* TODO:disable interrupts instead of reset to preserve signal states */
1432 if (!info
->tty
|| info
->tty
->termios
->c_cflag
& HUPCL
) {
1433 info
->serial_signals
&= ~(SerialSignal_DTR
+ SerialSignal_RTS
);
1437 spin_unlock_irqrestore(&info
->lock
,flags
);
1439 release_resources(info
);
1442 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1444 info
->flags
&= ~ASYNC_INITIALIZED
;
1447 static void mgslpc_program_hw(MGSLPC_INFO
*info
)
1449 unsigned long flags
;
1451 spin_lock_irqsave(&info
->lock
,flags
);
1455 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1457 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1464 info
->dcd_chkcount
= 0;
1465 info
->cts_chkcount
= 0;
1466 info
->ri_chkcount
= 0;
1467 info
->dsr_chkcount
= 0;
1469 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1470 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1473 if (info
->netcount
|| info
->tty
->termios
->c_cflag
& CREAD
)
1476 spin_unlock_irqrestore(&info
->lock
,flags
);
1479 /* Reconfigure adapter based on new parameters
1481 static void mgslpc_change_params(MGSLPC_INFO
*info
)
1486 if (!info
->tty
|| !info
->tty
->termios
)
1489 if (debug_level
>= DEBUG_LEVEL_INFO
)
1490 printk("%s(%d):mgslpc_change_params(%s)\n",
1491 __FILE__
,__LINE__
, info
->device_name
);
1493 cflag
= info
->tty
->termios
->c_cflag
;
1495 /* if B0 rate (hangup) specified then negate DTR and RTS */
1496 /* otherwise assert DTR and RTS */
1498 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
1500 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
1502 /* byte size and parity */
1504 switch (cflag
& CSIZE
) {
1505 case CS5
: info
->params
.data_bits
= 5; break;
1506 case CS6
: info
->params
.data_bits
= 6; break;
1507 case CS7
: info
->params
.data_bits
= 7; break;
1508 case CS8
: info
->params
.data_bits
= 8; break;
1509 default: info
->params
.data_bits
= 7; break;
1513 info
->params
.stop_bits
= 2;
1515 info
->params
.stop_bits
= 1;
1517 info
->params
.parity
= ASYNC_PARITY_NONE
;
1518 if (cflag
& PARENB
) {
1520 info
->params
.parity
= ASYNC_PARITY_ODD
;
1522 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1525 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1529 /* calculate number of jiffies to transmit a full
1530 * FIFO (32 bytes) at specified data rate
1532 bits_per_char
= info
->params
.data_bits
+
1533 info
->params
.stop_bits
+ 1;
1535 /* if port data rate is set to 460800 or less then
1536 * allow tty settings to override, otherwise keep the
1537 * current data rate.
1539 if (info
->params
.data_rate
<= 460800) {
1540 info
->params
.data_rate
= tty_get_baud_rate(info
->tty
);
1543 if ( info
->params
.data_rate
) {
1544 info
->timeout
= (32*HZ
*bits_per_char
) /
1545 info
->params
.data_rate
;
1547 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1549 if (cflag
& CRTSCTS
)
1550 info
->flags
|= ASYNC_CTS_FLOW
;
1552 info
->flags
&= ~ASYNC_CTS_FLOW
;
1555 info
->flags
&= ~ASYNC_CHECK_CD
;
1557 info
->flags
|= ASYNC_CHECK_CD
;
1559 /* process tty input control flags */
1561 info
->read_status_mask
= 0;
1562 if (I_INPCK(info
->tty
))
1563 info
->read_status_mask
|= BIT7
| BIT6
;
1564 if (I_IGNPAR(info
->tty
))
1565 info
->ignore_status_mask
|= BIT7
| BIT6
;
1567 mgslpc_program_hw(info
);
1570 /* Add a character to the transmit buffer
1572 static void mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1574 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1575 unsigned long flags
;
1577 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1578 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1579 __FILE__
,__LINE__
,ch
,info
->device_name
);
1582 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1585 if (!tty
|| !info
->tx_buf
)
1588 spin_lock_irqsave(&info
->lock
,flags
);
1590 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1591 if (info
->tx_count
< TXBUFSIZE
- 1) {
1592 info
->tx_buf
[info
->tx_put
++] = ch
;
1593 info
->tx_put
&= TXBUFSIZE
-1;
1598 spin_unlock_irqrestore(&info
->lock
,flags
);
1601 /* Enable transmitter so remaining characters in the
1602 * transmit buffer are sent.
1604 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1606 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1607 unsigned long flags
;
1609 if (debug_level
>= DEBUG_LEVEL_INFO
)
1610 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1611 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1613 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1616 if (info
->tx_count
<= 0 || tty
->stopped
||
1617 tty
->hw_stopped
|| !info
->tx_buf
)
1620 if (debug_level
>= DEBUG_LEVEL_INFO
)
1621 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1622 __FILE__
,__LINE__
,info
->device_name
);
1624 spin_lock_irqsave(&info
->lock
,flags
);
1625 if (!info
->tx_active
)
1627 spin_unlock_irqrestore(&info
->lock
,flags
);
1630 /* Send a block of data
1634 * tty pointer to tty information structure
1635 * buf pointer to buffer containing send data
1636 * count size of send data in bytes
1638 * Returns: number of characters written
1640 static int mgslpc_write(struct tty_struct
* tty
,
1641 const unsigned char *buf
, int count
)
1644 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1645 unsigned long flags
;
1647 if (debug_level
>= DEBUG_LEVEL_INFO
)
1648 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1649 __FILE__
,__LINE__
,info
->device_name
,count
);
1651 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1652 !tty
|| !info
->tx_buf
)
1655 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1656 if (count
> TXBUFSIZE
) {
1660 if (info
->tx_active
)
1662 else if (info
->tx_count
)
1668 min(TXBUFSIZE
- info
->tx_count
- 1,
1669 TXBUFSIZE
- info
->tx_put
));
1673 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1675 spin_lock_irqsave(&info
->lock
,flags
);
1676 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1677 info
->tx_count
+= c
;
1678 spin_unlock_irqrestore(&info
->lock
,flags
);
1685 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
1686 spin_lock_irqsave(&info
->lock
,flags
);
1687 if (!info
->tx_active
)
1689 spin_unlock_irqrestore(&info
->lock
,flags
);
1692 if (debug_level
>= DEBUG_LEVEL_INFO
)
1693 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1694 __FILE__
,__LINE__
,info
->device_name
,ret
);
1698 /* Return the count of free bytes in transmit buffer
1700 static int mgslpc_write_room(struct tty_struct
*tty
)
1702 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1705 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1708 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1709 /* HDLC (frame oriented) mode */
1710 if (info
->tx_active
)
1713 return HDLC_MAX_FRAME_SIZE
;
1715 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1720 if (debug_level
>= DEBUG_LEVEL_INFO
)
1721 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1722 __FILE__
,__LINE__
, info
->device_name
, ret
);
1726 /* Return the count of bytes in transmit buffer
1728 static int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1730 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1733 if (debug_level
>= DEBUG_LEVEL_INFO
)
1734 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1735 __FILE__
,__LINE__
, info
->device_name
);
1737 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1740 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1741 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1743 rc
= info
->tx_count
;
1745 if (debug_level
>= DEBUG_LEVEL_INFO
)
1746 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1747 __FILE__
,__LINE__
, info
->device_name
, rc
);
1752 /* Discard all data in the send buffer
1754 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1756 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1757 unsigned long flags
;
1759 if (debug_level
>= DEBUG_LEVEL_INFO
)
1760 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1761 __FILE__
,__LINE__
, info
->device_name
);
1763 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1766 spin_lock_irqsave(&info
->lock
,flags
);
1767 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1768 del_timer(&info
->tx_timer
);
1769 spin_unlock_irqrestore(&info
->lock
,flags
);
1771 wake_up_interruptible(&tty
->write_wait
);
1775 /* Send a high-priority XON/XOFF character
1777 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1779 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1780 unsigned long flags
;
1782 if (debug_level
>= DEBUG_LEVEL_INFO
)
1783 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1784 __FILE__
,__LINE__
, info
->device_name
, ch
);
1786 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1791 spin_lock_irqsave(&info
->lock
,flags
);
1792 if (!info
->tx_enabled
)
1794 spin_unlock_irqrestore(&info
->lock
,flags
);
1798 /* Signal remote device to throttle send data (our receive data)
1800 static void mgslpc_throttle(struct tty_struct
* tty
)
1802 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1803 unsigned long flags
;
1805 if (debug_level
>= DEBUG_LEVEL_INFO
)
1806 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1807 __FILE__
,__LINE__
, info
->device_name
);
1809 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1813 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1815 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1816 spin_lock_irqsave(&info
->lock
,flags
);
1817 info
->serial_signals
&= ~SerialSignal_RTS
;
1819 spin_unlock_irqrestore(&info
->lock
,flags
);
1823 /* Signal remote device to stop throttling send data (our receive data)
1825 static void mgslpc_unthrottle(struct tty_struct
* tty
)
1827 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1828 unsigned long flags
;
1830 if (debug_level
>= DEBUG_LEVEL_INFO
)
1831 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1832 __FILE__
,__LINE__
, info
->device_name
);
1834 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1841 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1844 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1845 spin_lock_irqsave(&info
->lock
,flags
);
1846 info
->serial_signals
|= SerialSignal_RTS
;
1848 spin_unlock_irqrestore(&info
->lock
,flags
);
1852 /* get the current serial statistics
1854 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1857 if (debug_level
>= DEBUG_LEVEL_INFO
)
1858 printk("get_params(%s)\n", info
->device_name
);
1860 memset(&info
->icount
, 0, sizeof(info
->icount
));
1862 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1869 /* get the current serial parameters
1871 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1874 if (debug_level
>= DEBUG_LEVEL_INFO
)
1875 printk("get_params(%s)\n", info
->device_name
);
1876 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1882 /* set the serial parameters
1886 * info pointer to device instance data
1887 * new_params user buffer containing new serial params
1889 * Returns: 0 if success, otherwise error code
1891 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
)
1893 unsigned long flags
;
1894 MGSL_PARAMS tmp_params
;
1897 if (debug_level
>= DEBUG_LEVEL_INFO
)
1898 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1899 info
->device_name
);
1900 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1902 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1903 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1904 __FILE__
,__LINE__
,info
->device_name
);
1908 spin_lock_irqsave(&info
->lock
,flags
);
1909 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
1910 spin_unlock_irqrestore(&info
->lock
,flags
);
1912 mgslpc_change_params(info
);
1917 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
1920 if (debug_level
>= DEBUG_LEVEL_INFO
)
1921 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
1922 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
1928 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
1930 unsigned long flags
;
1931 if (debug_level
>= DEBUG_LEVEL_INFO
)
1932 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
1933 spin_lock_irqsave(&info
->lock
,flags
);
1934 info
->idle_mode
= idle_mode
;
1936 spin_unlock_irqrestore(&info
->lock
,flags
);
1940 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
1943 if (debug_level
>= DEBUG_LEVEL_INFO
)
1944 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
1945 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
1951 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
1953 unsigned long flags
;
1955 if (debug_level
>= DEBUG_LEVEL_INFO
)
1956 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
1957 spin_lock_irqsave(&info
->lock
,flags
);
1958 info
->if_mode
= if_mode
;
1960 val
= read_reg(info
, PVR
) & 0x0f;
1961 switch (info
->if_mode
)
1963 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
1964 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
1965 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
1967 write_reg(info
, PVR
, val
);
1969 spin_unlock_irqrestore(&info
->lock
,flags
);
1973 static int set_txenable(MGSLPC_INFO
* info
, int enable
)
1975 unsigned long flags
;
1977 if (debug_level
>= DEBUG_LEVEL_INFO
)
1978 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
1980 spin_lock_irqsave(&info
->lock
,flags
);
1982 if (!info
->tx_enabled
)
1985 if (info
->tx_enabled
)
1988 spin_unlock_irqrestore(&info
->lock
,flags
);
1992 static int tx_abort(MGSLPC_INFO
* info
)
1994 unsigned long flags
;
1996 if (debug_level
>= DEBUG_LEVEL_INFO
)
1997 printk("tx_abort(%s)\n", info
->device_name
);
1999 spin_lock_irqsave(&info
->lock
,flags
);
2000 if (info
->tx_active
&& info
->tx_count
&&
2001 info
->params
.mode
== MGSL_MODE_HDLC
) {
2002 /* clear data count so FIFO is not filled on next IRQ.
2003 * This results in underrun and abort transmission.
2005 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
2006 info
->tx_aborting
= TRUE
;
2008 spin_unlock_irqrestore(&info
->lock
,flags
);
2012 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
2014 unsigned long flags
;
2016 if (debug_level
>= DEBUG_LEVEL_INFO
)
2017 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
2019 spin_lock_irqsave(&info
->lock
,flags
);
2021 if (!info
->rx_enabled
)
2024 if (info
->rx_enabled
)
2027 spin_unlock_irqrestore(&info
->lock
,flags
);
2031 /* wait for specified event to occur
2033 * Arguments: info pointer to device instance data
2034 * mask pointer to bitmask of events to wait for
2035 * Return Value: 0 if successful and bit mask updated with
2036 * of events triggerred,
2037 * otherwise error code
2039 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
2041 unsigned long flags
;
2044 struct mgsl_icount cprev
, cnow
;
2047 struct _input_signal_events oldsigs
, newsigs
;
2048 DECLARE_WAITQUEUE(wait
, current
);
2050 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
2054 if (debug_level
>= DEBUG_LEVEL_INFO
)
2055 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
2057 spin_lock_irqsave(&info
->lock
,flags
);
2059 /* return immediately if state matches requested events */
2061 s
= info
->serial_signals
;
2063 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
2064 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
2065 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
2066 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
2068 spin_unlock_irqrestore(&info
->lock
,flags
);
2072 /* save current irq counts */
2073 cprev
= info
->icount
;
2074 oldsigs
= info
->input_signal_events
;
2076 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
2077 (mask
& MgslEvent_ExitHuntMode
))
2078 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
2080 set_current_state(TASK_INTERRUPTIBLE
);
2081 add_wait_queue(&info
->event_wait_q
, &wait
);
2083 spin_unlock_irqrestore(&info
->lock
,flags
);
2088 if (signal_pending(current
)) {
2093 /* get current irq counts */
2094 spin_lock_irqsave(&info
->lock
,flags
);
2095 cnow
= info
->icount
;
2096 newsigs
= info
->input_signal_events
;
2097 set_current_state(TASK_INTERRUPTIBLE
);
2098 spin_unlock_irqrestore(&info
->lock
,flags
);
2100 /* if no change, wait aborted for some reason */
2101 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2102 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2103 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2104 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2105 newsigs
.cts_up
== oldsigs
.cts_up
&&
2106 newsigs
.cts_down
== oldsigs
.cts_down
&&
2107 newsigs
.ri_up
== oldsigs
.ri_up
&&
2108 newsigs
.ri_down
== oldsigs
.ri_down
&&
2109 cnow
.exithunt
== cprev
.exithunt
&&
2110 cnow
.rxidle
== cprev
.rxidle
) {
2116 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2117 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2118 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2119 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2120 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2121 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2122 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2123 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2124 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2125 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2133 remove_wait_queue(&info
->event_wait_q
, &wait
);
2134 set_current_state(TASK_RUNNING
);
2136 if (mask
& MgslEvent_ExitHuntMode
) {
2137 spin_lock_irqsave(&info
->lock
,flags
);
2138 if (!waitqueue_active(&info
->event_wait_q
))
2139 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2140 spin_unlock_irqrestore(&info
->lock
,flags
);
2144 PUT_USER(rc
, events
, mask_ptr
);
2148 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2150 unsigned long flags
;
2152 struct mgsl_icount cprev
, cnow
;
2153 DECLARE_WAITQUEUE(wait
, current
);
2155 /* save current irq counts */
2156 spin_lock_irqsave(&info
->lock
,flags
);
2157 cprev
= info
->icount
;
2158 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2159 set_current_state(TASK_INTERRUPTIBLE
);
2160 spin_unlock_irqrestore(&info
->lock
,flags
);
2164 if (signal_pending(current
)) {
2169 /* get new irq counts */
2170 spin_lock_irqsave(&info
->lock
,flags
);
2171 cnow
= info
->icount
;
2172 set_current_state(TASK_INTERRUPTIBLE
);
2173 spin_unlock_irqrestore(&info
->lock
,flags
);
2175 /* if no change, wait aborted for some reason */
2176 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2177 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2182 /* check for change in caller specified modem input */
2183 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2184 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2185 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2186 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2193 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2194 set_current_state(TASK_RUNNING
);
2198 /* return the state of the serial control and status signals
2200 static int tiocmget(struct tty_struct
*tty
, struct file
*file
)
2202 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2203 unsigned int result
;
2204 unsigned long flags
;
2206 spin_lock_irqsave(&info
->lock
,flags
);
2208 spin_unlock_irqrestore(&info
->lock
,flags
);
2210 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2211 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2212 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2213 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2214 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2215 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2217 if (debug_level
>= DEBUG_LEVEL_INFO
)
2218 printk("%s(%d):%s tiocmget() value=%08X\n",
2219 __FILE__
,__LINE__
, info
->device_name
, result
);
2223 /* set modem control signals (DTR/RTS)
2225 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
2226 unsigned int set
, unsigned int clear
)
2228 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2229 unsigned long flags
;
2231 if (debug_level
>= DEBUG_LEVEL_INFO
)
2232 printk("%s(%d):%s tiocmset(%x,%x)\n",
2233 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
2235 if (set
& TIOCM_RTS
)
2236 info
->serial_signals
|= SerialSignal_RTS
;
2237 if (set
& TIOCM_DTR
)
2238 info
->serial_signals
|= SerialSignal_DTR
;
2239 if (clear
& TIOCM_RTS
)
2240 info
->serial_signals
&= ~SerialSignal_RTS
;
2241 if (clear
& TIOCM_DTR
)
2242 info
->serial_signals
&= ~SerialSignal_DTR
;
2244 spin_lock_irqsave(&info
->lock
,flags
);
2246 spin_unlock_irqrestore(&info
->lock
,flags
);
2251 /* Set or clear transmit break condition
2253 * Arguments: tty pointer to tty instance data
2254 * break_state -1=set break condition, 0=clear
2256 static void mgslpc_break(struct tty_struct
*tty
, int break_state
)
2258 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2259 unsigned long flags
;
2261 if (debug_level
>= DEBUG_LEVEL_INFO
)
2262 printk("%s(%d):mgslpc_break(%s,%d)\n",
2263 __FILE__
,__LINE__
, info
->device_name
, break_state
);
2265 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2268 spin_lock_irqsave(&info
->lock
,flags
);
2269 if (break_state
== -1)
2270 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2272 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2273 spin_unlock_irqrestore(&info
->lock
,flags
);
2276 /* Service an IOCTL request
2280 * tty pointer to tty instance data
2281 * file pointer to associated file object for device
2282 * cmd IOCTL command code
2283 * arg command argument/context
2285 * Return Value: 0 if success, otherwise error code
2287 static int mgslpc_ioctl(struct tty_struct
*tty
, struct file
* file
,
2288 unsigned int cmd
, unsigned long arg
)
2290 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2292 if (debug_level
>= DEBUG_LEVEL_INFO
)
2293 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2294 info
->device_name
, cmd
);
2296 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2299 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2300 (cmd
!= TIOCMIWAIT
) && (cmd
!= TIOCGICOUNT
)) {
2301 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2305 return ioctl_common(info
, cmd
, arg
);
2308 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
)
2311 struct mgsl_icount cnow
; /* kernel counter temps */
2312 struct serial_icounter_struct __user
*p_cuser
; /* user space */
2313 void __user
*argp
= (void __user
*)arg
;
2314 unsigned long flags
;
2317 case MGSL_IOCGPARAMS
:
2318 return get_params(info
, argp
);
2319 case MGSL_IOCSPARAMS
:
2320 return set_params(info
, argp
);
2321 case MGSL_IOCGTXIDLE
:
2322 return get_txidle(info
, argp
);
2323 case MGSL_IOCSTXIDLE
:
2324 return set_txidle(info
, (int)arg
);
2326 return get_interface(info
, argp
);
2328 return set_interface(info
,(int)arg
);
2329 case MGSL_IOCTXENABLE
:
2330 return set_txenable(info
,(int)arg
);
2331 case MGSL_IOCRXENABLE
:
2332 return set_rxenable(info
,(int)arg
);
2333 case MGSL_IOCTXABORT
:
2334 return tx_abort(info
);
2335 case MGSL_IOCGSTATS
:
2336 return get_stats(info
, argp
);
2337 case MGSL_IOCWAITEVENT
:
2338 return wait_events(info
, argp
);
2340 return modem_input_wait(info
,(int)arg
);
2342 spin_lock_irqsave(&info
->lock
,flags
);
2343 cnow
= info
->icount
;
2344 spin_unlock_irqrestore(&info
->lock
,flags
);
2346 PUT_USER(error
,cnow
.cts
, &p_cuser
->cts
);
2347 if (error
) return error
;
2348 PUT_USER(error
,cnow
.dsr
, &p_cuser
->dsr
);
2349 if (error
) return error
;
2350 PUT_USER(error
,cnow
.rng
, &p_cuser
->rng
);
2351 if (error
) return error
;
2352 PUT_USER(error
,cnow
.dcd
, &p_cuser
->dcd
);
2353 if (error
) return error
;
2354 PUT_USER(error
,cnow
.rx
, &p_cuser
->rx
);
2355 if (error
) return error
;
2356 PUT_USER(error
,cnow
.tx
, &p_cuser
->tx
);
2357 if (error
) return error
;
2358 PUT_USER(error
,cnow
.frame
, &p_cuser
->frame
);
2359 if (error
) return error
;
2360 PUT_USER(error
,cnow
.overrun
, &p_cuser
->overrun
);
2361 if (error
) return error
;
2362 PUT_USER(error
,cnow
.parity
, &p_cuser
->parity
);
2363 if (error
) return error
;
2364 PUT_USER(error
,cnow
.brk
, &p_cuser
->brk
);
2365 if (error
) return error
;
2366 PUT_USER(error
,cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
2367 if (error
) return error
;
2370 return -ENOIOCTLCMD
;
2375 /* Set new termios settings
2379 * tty pointer to tty structure
2380 * termios pointer to buffer to hold returned old termios
2382 static void mgslpc_set_termios(struct tty_struct
*tty
, struct termios
*old_termios
)
2384 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2385 unsigned long flags
;
2387 if (debug_level
>= DEBUG_LEVEL_INFO
)
2388 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2389 tty
->driver
->name
);
2391 /* just return if nothing has changed */
2392 if ((tty
->termios
->c_cflag
== old_termios
->c_cflag
)
2393 && (RELEVANT_IFLAG(tty
->termios
->c_iflag
)
2394 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2397 mgslpc_change_params(info
);
2399 /* Handle transition to B0 status */
2400 if (old_termios
->c_cflag
& CBAUD
&&
2401 !(tty
->termios
->c_cflag
& CBAUD
)) {
2402 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2403 spin_lock_irqsave(&info
->lock
,flags
);
2405 spin_unlock_irqrestore(&info
->lock
,flags
);
2408 /* Handle transition away from B0 status */
2409 if (!(old_termios
->c_cflag
& CBAUD
) &&
2410 tty
->termios
->c_cflag
& CBAUD
) {
2411 info
->serial_signals
|= SerialSignal_DTR
;
2412 if (!(tty
->termios
->c_cflag
& CRTSCTS
) ||
2413 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2414 info
->serial_signals
|= SerialSignal_RTS
;
2416 spin_lock_irqsave(&info
->lock
,flags
);
2418 spin_unlock_irqrestore(&info
->lock
,flags
);
2421 /* Handle turning off CRTSCTS */
2422 if (old_termios
->c_cflag
& CRTSCTS
&&
2423 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2424 tty
->hw_stopped
= 0;
2429 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2431 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2433 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2436 if (debug_level
>= DEBUG_LEVEL_INFO
)
2437 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2438 __FILE__
,__LINE__
, info
->device_name
, info
->count
);
2443 if (tty_hung_up_p(filp
))
2446 if ((tty
->count
== 1) && (info
->count
!= 1)) {
2448 * tty->count is 1 and the tty structure will be freed.
2449 * info->count should be one in this case.
2450 * if it's not, correct it so that the port is shutdown.
2452 printk("mgslpc_close: bad refcount; tty->count is 1, "
2453 "info->count is %d\n", info
->count
);
2459 /* if at least one open remaining, leave hardware active */
2463 info
->flags
|= ASYNC_CLOSING
;
2465 /* set tty->closing to notify line discipline to
2466 * only process XON/XOFF characters. Only the N_TTY
2467 * discipline appears to use this (ppp does not).
2471 /* wait for transmit data to clear all layers */
2473 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
) {
2474 if (debug_level
>= DEBUG_LEVEL_INFO
)
2475 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2476 __FILE__
,__LINE__
, info
->device_name
);
2477 tty_wait_until_sent(tty
, info
->closing_wait
);
2480 if (info
->flags
& ASYNC_INITIALIZED
)
2481 mgslpc_wait_until_sent(tty
, info
->timeout
);
2483 if (tty
->driver
->flush_buffer
)
2484 tty
->driver
->flush_buffer(tty
);
2486 ldisc_flush_buffer(tty
);
2493 if (info
->blocked_open
) {
2494 if (info
->close_delay
) {
2495 msleep_interruptible(jiffies_to_msecs(info
->close_delay
));
2497 wake_up_interruptible(&info
->open_wait
);
2500 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
|ASYNC_CLOSING
);
2502 wake_up_interruptible(&info
->close_wait
);
2505 if (debug_level
>= DEBUG_LEVEL_INFO
)
2506 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2507 tty
->driver
->name
, info
->count
);
2510 /* Wait until the transmitter is empty.
2512 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2514 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2515 unsigned long orig_jiffies
, char_time
;
2520 if (debug_level
>= DEBUG_LEVEL_INFO
)
2521 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2522 __FILE__
,__LINE__
, info
->device_name
);
2524 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2527 if (!(info
->flags
& ASYNC_INITIALIZED
))
2530 orig_jiffies
= jiffies
;
2532 /* Set check interval to 1/5 of estimated time to
2533 * send a character, and make it at least 1. The check
2534 * interval should also be less than the timeout.
2535 * Note: use tight timings here to satisfy the NIST-PCTS.
2538 if ( info
->params
.data_rate
) {
2539 char_time
= info
->timeout
/(32 * 5);
2546 char_time
= min_t(unsigned long, char_time
, timeout
);
2548 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2549 while (info
->tx_active
) {
2550 msleep_interruptible(jiffies_to_msecs(char_time
));
2551 if (signal_pending(current
))
2553 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2557 while ((info
->tx_count
|| info
->tx_active
) &&
2559 msleep_interruptible(jiffies_to_msecs(char_time
));
2560 if (signal_pending(current
))
2562 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2568 if (debug_level
>= DEBUG_LEVEL_INFO
)
2569 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2570 __FILE__
,__LINE__
, info
->device_name
);
2573 /* Called by tty_hangup() when a hangup is signaled.
2574 * This is the same as closing all open files for the port.
2576 static void mgslpc_hangup(struct tty_struct
*tty
)
2578 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2580 if (debug_level
>= DEBUG_LEVEL_INFO
)
2581 printk("%s(%d):mgslpc_hangup(%s)\n",
2582 __FILE__
,__LINE__
, info
->device_name
);
2584 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2587 mgslpc_flush_buffer(tty
);
2591 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2594 wake_up_interruptible(&info
->open_wait
);
2597 /* Block the current process until the specified port
2598 * is ready to be opened.
2600 static int block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
2603 DECLARE_WAITQUEUE(wait
, current
);
2605 int do_clocal
= 0, extra_count
= 0;
2606 unsigned long flags
;
2608 if (debug_level
>= DEBUG_LEVEL_INFO
)
2609 printk("%s(%d):block_til_ready on %s\n",
2610 __FILE__
,__LINE__
, tty
->driver
->name
);
2612 if (filp
->f_flags
& O_NONBLOCK
|| tty
->flags
& (1 << TTY_IO_ERROR
)){
2613 /* nonblock mode is set or port is not enabled */
2614 /* just verify that callout device is not active */
2615 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2619 if (tty
->termios
->c_cflag
& CLOCAL
)
2622 /* Wait for carrier detect and the line to become
2623 * free (i.e., not in use by the callout). While we are in
2624 * this loop, info->count is dropped by one, so that
2625 * mgslpc_close() knows when to free things. We restore it upon
2626 * exit, either normal or abnormal.
2630 add_wait_queue(&info
->open_wait
, &wait
);
2632 if (debug_level
>= DEBUG_LEVEL_INFO
)
2633 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2634 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2636 spin_lock_irqsave(&info
->lock
, flags
);
2637 if (!tty_hung_up_p(filp
)) {
2641 spin_unlock_irqrestore(&info
->lock
, flags
);
2642 info
->blocked_open
++;
2645 if ((tty
->termios
->c_cflag
& CBAUD
)) {
2646 spin_lock_irqsave(&info
->lock
,flags
);
2647 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2649 spin_unlock_irqrestore(&info
->lock
,flags
);
2652 set_current_state(TASK_INTERRUPTIBLE
);
2654 if (tty_hung_up_p(filp
) || !(info
->flags
& ASYNC_INITIALIZED
)){
2655 retval
= (info
->flags
& ASYNC_HUP_NOTIFY
) ?
2656 -EAGAIN
: -ERESTARTSYS
;
2660 spin_lock_irqsave(&info
->lock
,flags
);
2662 spin_unlock_irqrestore(&info
->lock
,flags
);
2664 if (!(info
->flags
& ASYNC_CLOSING
) &&
2665 (do_clocal
|| (info
->serial_signals
& SerialSignal_DCD
)) ) {
2669 if (signal_pending(current
)) {
2670 retval
= -ERESTARTSYS
;
2674 if (debug_level
>= DEBUG_LEVEL_INFO
)
2675 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2676 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2681 set_current_state(TASK_RUNNING
);
2682 remove_wait_queue(&info
->open_wait
, &wait
);
2686 info
->blocked_open
--;
2688 if (debug_level
>= DEBUG_LEVEL_INFO
)
2689 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2690 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2693 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2698 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2702 unsigned long flags
;
2704 /* verify range of specified line number */
2706 if ((line
< 0) || (line
>= mgslpc_device_count
)) {
2707 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2708 __FILE__
,__LINE__
,line
);
2712 /* find the info structure for the specified line */
2713 info
= mgslpc_device_list
;
2714 while(info
&& info
->line
!= line
)
2715 info
= info
->next_device
;
2716 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2719 tty
->driver_data
= info
;
2722 if (debug_level
>= DEBUG_LEVEL_INFO
)
2723 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2724 __FILE__
,__LINE__
,tty
->driver
->name
, info
->count
);
2726 /* If port is closing, signal caller to try again */
2727 if (tty_hung_up_p(filp
) || info
->flags
& ASYNC_CLOSING
){
2728 if (info
->flags
& ASYNC_CLOSING
)
2729 interruptible_sleep_on(&info
->close_wait
);
2730 retval
= ((info
->flags
& ASYNC_HUP_NOTIFY
) ?
2731 -EAGAIN
: -ERESTARTSYS
);
2735 info
->tty
->low_latency
= (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2737 spin_lock_irqsave(&info
->netlock
, flags
);
2738 if (info
->netcount
) {
2740 spin_unlock_irqrestore(&info
->netlock
, flags
);
2744 spin_unlock_irqrestore(&info
->netlock
, flags
);
2746 if (info
->count
== 1) {
2747 /* 1st open on this device, init hardware */
2748 retval
= startup(info
);
2753 retval
= block_til_ready(tty
, filp
, info
);
2755 if (debug_level
>= DEBUG_LEVEL_INFO
)
2756 printk("%s(%d):block_til_ready(%s) returned %d\n",
2757 __FILE__
,__LINE__
, info
->device_name
, retval
);
2761 if (debug_level
>= DEBUG_LEVEL_INFO
)
2762 printk("%s(%d):mgslpc_open(%s) success\n",
2763 __FILE__
,__LINE__
, info
->device_name
);
2768 if (tty
->count
== 1)
2769 info
->tty
= NULL
; /* tty layer will release tty struct */
2778 * /proc fs routines....
2781 static inline int line_info(char *buf
, MGSLPC_INFO
*info
)
2785 unsigned long flags
;
2787 ret
= sprintf(buf
, "%s:io:%04X irq:%d",
2788 info
->device_name
, info
->io_base
, info
->irq_level
);
2790 /* output current serial signal states */
2791 spin_lock_irqsave(&info
->lock
,flags
);
2793 spin_unlock_irqrestore(&info
->lock
,flags
);
2797 if (info
->serial_signals
& SerialSignal_RTS
)
2798 strcat(stat_buf
, "|RTS");
2799 if (info
->serial_signals
& SerialSignal_CTS
)
2800 strcat(stat_buf
, "|CTS");
2801 if (info
->serial_signals
& SerialSignal_DTR
)
2802 strcat(stat_buf
, "|DTR");
2803 if (info
->serial_signals
& SerialSignal_DSR
)
2804 strcat(stat_buf
, "|DSR");
2805 if (info
->serial_signals
& SerialSignal_DCD
)
2806 strcat(stat_buf
, "|CD");
2807 if (info
->serial_signals
& SerialSignal_RI
)
2808 strcat(stat_buf
, "|RI");
2810 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2811 ret
+= sprintf(buf
+ret
, " HDLC txok:%d rxok:%d",
2812 info
->icount
.txok
, info
->icount
.rxok
);
2813 if (info
->icount
.txunder
)
2814 ret
+= sprintf(buf
+ret
, " txunder:%d", info
->icount
.txunder
);
2815 if (info
->icount
.txabort
)
2816 ret
+= sprintf(buf
+ret
, " txabort:%d", info
->icount
.txabort
);
2817 if (info
->icount
.rxshort
)
2818 ret
+= sprintf(buf
+ret
, " rxshort:%d", info
->icount
.rxshort
);
2819 if (info
->icount
.rxlong
)
2820 ret
+= sprintf(buf
+ret
, " rxlong:%d", info
->icount
.rxlong
);
2821 if (info
->icount
.rxover
)
2822 ret
+= sprintf(buf
+ret
, " rxover:%d", info
->icount
.rxover
);
2823 if (info
->icount
.rxcrc
)
2824 ret
+= sprintf(buf
+ret
, " rxcrc:%d", info
->icount
.rxcrc
);
2826 ret
+= sprintf(buf
+ret
, " ASYNC tx:%d rx:%d",
2827 info
->icount
.tx
, info
->icount
.rx
);
2828 if (info
->icount
.frame
)
2829 ret
+= sprintf(buf
+ret
, " fe:%d", info
->icount
.frame
);
2830 if (info
->icount
.parity
)
2831 ret
+= sprintf(buf
+ret
, " pe:%d", info
->icount
.parity
);
2832 if (info
->icount
.brk
)
2833 ret
+= sprintf(buf
+ret
, " brk:%d", info
->icount
.brk
);
2834 if (info
->icount
.overrun
)
2835 ret
+= sprintf(buf
+ret
, " oe:%d", info
->icount
.overrun
);
2838 /* Append serial signal status to end */
2839 ret
+= sprintf(buf
+ret
, " %s\n", stat_buf
+1);
2841 ret
+= sprintf(buf
+ret
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2842 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2848 /* Called to print information about devices
2850 static int mgslpc_read_proc(char *page
, char **start
, off_t off
, int count
,
2851 int *eof
, void *data
)
2857 len
+= sprintf(page
, "synclink driver:%s\n", driver_version
);
2859 info
= mgslpc_device_list
;
2861 l
= line_info(page
+ len
, info
);
2863 if (len
+begin
> off
+count
)
2865 if (len
+begin
< off
) {
2869 info
= info
->next_device
;
2874 if (off
>= len
+begin
)
2876 *start
= page
+ (off
-begin
);
2877 return ((count
< begin
+len
-off
) ? count
: begin
+len
-off
);
2880 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2882 /* each buffer has header and data */
2883 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2885 /* calculate total allocation size for 8 buffers */
2886 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2888 /* limit total allocated memory */
2889 if (info
->rx_buf_total_size
> 0x10000)
2890 info
->rx_buf_total_size
= 0x10000;
2892 /* calculate number of buffers */
2893 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2895 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2896 if (info
->rx_buf
== NULL
)
2899 rx_reset_buffers(info
);
2903 static void rx_free_buffers(MGSLPC_INFO
*info
)
2905 kfree(info
->rx_buf
);
2906 info
->rx_buf
= NULL
;
2909 static int claim_resources(MGSLPC_INFO
*info
)
2911 if (rx_alloc_buffers(info
) < 0 ) {
2912 printk( "Cant allocate rx buffer %s\n", info
->device_name
);
2913 release_resources(info
);
2919 static void release_resources(MGSLPC_INFO
*info
)
2921 if (debug_level
>= DEBUG_LEVEL_INFO
)
2922 printk("release_resources(%s)\n", info
->device_name
);
2923 rx_free_buffers(info
);
2926 /* Add the specified device instance data structure to the
2927 * global linked list of devices and increment the device count.
2929 * Arguments: info pointer to device instance data
2931 static void mgslpc_add_device(MGSLPC_INFO
*info
)
2933 info
->next_device
= NULL
;
2934 info
->line
= mgslpc_device_count
;
2935 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2937 if (info
->line
< MAX_DEVICE_COUNT
) {
2938 if (maxframe
[info
->line
])
2939 info
->max_frame_size
= maxframe
[info
->line
];
2940 info
->dosyncppp
= dosyncppp
[info
->line
];
2943 mgslpc_device_count
++;
2945 if (!mgslpc_device_list
)
2946 mgslpc_device_list
= info
;
2948 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
2949 while( current_dev
->next_device
)
2950 current_dev
= current_dev
->next_device
;
2951 current_dev
->next_device
= info
;
2954 if (info
->max_frame_size
< 4096)
2955 info
->max_frame_size
= 4096;
2956 else if (info
->max_frame_size
> 65535)
2957 info
->max_frame_size
= 65535;
2959 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2960 info
->device_name
, info
->io_base
, info
->irq_level
);
2967 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2969 MGSLPC_INFO
*info
= mgslpc_device_list
;
2970 MGSLPC_INFO
*last
= NULL
;
2973 if (info
== remove_info
) {
2975 last
->next_device
= info
->next_device
;
2977 mgslpc_device_list
= info
->next_device
;
2981 release_resources(info
);
2983 mgslpc_device_count
--;
2987 info
= info
->next_device
;
2991 static struct pcmcia_device_id mgslpc_ids
[] = {
2992 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2995 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2997 static struct pcmcia_driver mgslpc_driver
= {
2998 .owner
= THIS_MODULE
,
3000 .name
= "synclink_cs",
3002 .probe
= mgslpc_probe
,
3003 .remove
= mgslpc_detach
,
3004 .id_table
= mgslpc_ids
,
3005 .suspend
= mgslpc_suspend
,
3006 .resume
= mgslpc_resume
,
3009 static struct tty_operations mgslpc_ops
= {
3010 .open
= mgslpc_open
,
3011 .close
= mgslpc_close
,
3012 .write
= mgslpc_write
,
3013 .put_char
= mgslpc_put_char
,
3014 .flush_chars
= mgslpc_flush_chars
,
3015 .write_room
= mgslpc_write_room
,
3016 .chars_in_buffer
= mgslpc_chars_in_buffer
,
3017 .flush_buffer
= mgslpc_flush_buffer
,
3018 .ioctl
= mgslpc_ioctl
,
3019 .throttle
= mgslpc_throttle
,
3020 .unthrottle
= mgslpc_unthrottle
,
3021 .send_xchar
= mgslpc_send_xchar
,
3022 .break_ctl
= mgslpc_break
,
3023 .wait_until_sent
= mgslpc_wait_until_sent
,
3024 .read_proc
= mgslpc_read_proc
,
3025 .set_termios
= mgslpc_set_termios
,
3027 .start
= tx_release
,
3028 .hangup
= mgslpc_hangup
,
3029 .tiocmget
= tiocmget
,
3030 .tiocmset
= tiocmset
,
3033 static void synclink_cs_cleanup(void)
3037 printk("Unloading %s: version %s\n", driver_name
, driver_version
);
3039 while(mgslpc_device_list
)
3040 mgslpc_remove_device(mgslpc_device_list
);
3042 if (serial_driver
) {
3043 if ((rc
= tty_unregister_driver(serial_driver
)))
3044 printk("%s(%d) failed to unregister tty driver err=%d\n",
3045 __FILE__
,__LINE__
,rc
);
3046 put_tty_driver(serial_driver
);
3049 pcmcia_unregister_driver(&mgslpc_driver
);
3052 static int __init
synclink_cs_init(void)
3056 if (break_on_load
) {
3057 mgslpc_get_text_ptr();
3061 printk("%s %s\n", driver_name
, driver_version
);
3063 if ((rc
= pcmcia_register_driver(&mgslpc_driver
)) < 0)
3066 serial_driver
= alloc_tty_driver(MAX_DEVICE_COUNT
);
3067 if (!serial_driver
) {
3072 /* Initialize the tty_driver structure */
3074 serial_driver
->owner
= THIS_MODULE
;
3075 serial_driver
->driver_name
= "synclink_cs";
3076 serial_driver
->name
= "ttySLP";
3077 serial_driver
->major
= ttymajor
;
3078 serial_driver
->minor_start
= 64;
3079 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
3080 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
3081 serial_driver
->init_termios
= tty_std_termios
;
3082 serial_driver
->init_termios
.c_cflag
=
3083 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
3084 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
3085 tty_set_operations(serial_driver
, &mgslpc_ops
);
3087 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
3088 printk("%s(%d):Couldn't register serial driver\n",
3090 put_tty_driver(serial_driver
);
3091 serial_driver
= NULL
;
3095 printk("%s %s, tty major#%d\n",
3096 driver_name
, driver_version
,
3097 serial_driver
->major
);
3102 synclink_cs_cleanup();
3106 static void __exit
synclink_cs_exit(void)
3108 synclink_cs_cleanup();
3111 module_init(synclink_cs_init
);
3112 module_exit(synclink_cs_exit
);
3114 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
3119 /* note:standard BRG mode is broken in V3.2 chip
3120 * so enhanced mode is always used
3128 for (M
= 1; N
> 64 && M
< 16; M
++)
3134 * BGR[7..0] contained in BGR register
3135 * BGR[9..8] contained in CCR2[7..6]
3136 * divisor = (N+1)*2^M
3138 * Note: M *must* not be zero (causes asymetric duty cycle)
3140 write_reg(info
, (unsigned char) (channel
+ BGR
),
3141 (unsigned char) ((M
<< 6) + N
));
3142 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
3143 val
|= ((M
<< 4) & 0xc0);
3144 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
3148 /* Enabled the AUX clock output at the specified frequency.
3150 static void enable_auxclk(MGSLPC_INFO
*info
)
3156 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3157 * 05 ADM Address Mode, 0 = no addr recognition
3158 * 04 TMD Timer Mode, 0 = external
3159 * 03 RAC Receiver Active, 0 = inactive
3160 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3161 * 01 TRS Timer Resolution, 1=512
3162 * 00 TLP Test Loop, 0 = no loop
3168 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3169 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3171 write_reg(info
, CHB
+ MODE
, val
);
3175 * 07 PU Power Up, 1=active, 0=power down
3176 * 06 MCE Master Clock Enable, 1=enabled
3178 * 04..02 SC[2..0] Encoding
3179 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3183 write_reg(info
, CHB
+ CCR0
, 0xc0);
3187 * 07 SFLG Shared Flag, 0 = disable shared flags
3188 * 06 GALP Go Active On Loop, 0 = not used
3189 * 05 GLP Go On Loop, 0 = not used
3190 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3191 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3192 * 02..00 CM[2..0] Clock Mode
3196 write_reg(info
, CHB
+ CCR1
, 0x17);
3200 * 07..06 BGR[9..8] Baud rate bits 9..8
3201 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3202 * 04 SSEL Clock source select, 1=submode b
3203 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3204 * 02 RWX Read/Write Exchange 0=disabled
3205 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3206 * 00 DIV, data inversion 0=disabled, 1=enabled
3210 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3211 write_reg(info
, CHB
+ CCR2
, 0x38);
3213 write_reg(info
, CHB
+ CCR2
, 0x30);
3217 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3218 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3219 * 05 TST1 Test Pin, 0=normal operation
3220 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3221 * 03..02 Reserved, must be 0
3222 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3226 write_reg(info
, CHB
+ CCR4
, 0x50);
3228 /* if auxclk not enabled, set internal BRG so
3229 * CTS transitions can be detected (requires TxC)
3231 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3232 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
3234 mgslpc_set_rate(info
, CHB
, 921600);
3237 static void loopback_enable(MGSLPC_INFO
*info
)
3241 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3242 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
3243 write_reg(info
, CHA
+ CCR1
, val
);
3245 /* CCR2:04 SSEL Clock source select, 1=submode b */
3246 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3247 write_reg(info
, CHA
+ CCR2
, val
);
3249 /* set LinkSpeed if available, otherwise default to 2Mbps */
3250 if (info
->params
.clock_speed
)
3251 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3253 mgslpc_set_rate(info
, CHA
, 1843200);
3255 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3256 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3257 write_reg(info
, CHA
+ MODE
, val
);
3260 static void hdlc_mode(MGSLPC_INFO
*info
)
3263 unsigned char clkmode
, clksubmode
;
3265 /* disable all interrupts */
3266 irq_disable(info
, CHA
, 0xffff);
3267 irq_disable(info
, CHB
, 0xffff);
3268 port_irq_disable(info
, 0xff);
3270 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3271 clkmode
= clksubmode
= 0;
3272 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3273 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3274 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3276 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3277 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3278 /* clock mode 7b, rcv = BRG, xmt = BRG */
3281 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3282 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3283 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3287 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3290 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3291 /* clock mode 0b, rcv = RxC, xmt = BRG */
3297 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3298 * 05 ADM Address Mode, 0 = no addr recognition
3299 * 04 TMD Timer Mode, 0 = external
3300 * 03 RAC Receiver Active, 0 = inactive
3301 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3302 * 01 TRS Timer Resolution, 1=512
3303 * 00 TLP Test Loop, 0 = no loop
3308 if (info
->params
.loopback
)
3311 /* preserve RTS state */
3312 if (info
->serial_signals
& SerialSignal_RTS
)
3314 write_reg(info
, CHA
+ MODE
, val
);
3318 * 07 PU Power Up, 1=active, 0=power down
3319 * 06 MCE Master Clock Enable, 1=enabled
3321 * 04..02 SC[2..0] Encoding
3322 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3327 switch (info
->params
.encoding
)
3329 case HDLC_ENCODING_NRZI
:
3332 case HDLC_ENCODING_BIPHASE_SPACE
:
3335 case HDLC_ENCODING_BIPHASE_MARK
:
3338 case HDLC_ENCODING_BIPHASE_LEVEL
:
3340 break; // Manchester
3342 write_reg(info
, CHA
+ CCR0
, val
);
3346 * 07 SFLG Shared Flag, 0 = disable shared flags
3347 * 06 GALP Go Active On Loop, 0 = not used
3348 * 05 GLP Go On Loop, 0 = not used
3349 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3350 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3351 * 02..00 CM[2..0] Clock Mode
3355 val
= 0x10 + clkmode
;
3356 write_reg(info
, CHA
+ CCR1
, val
);
3360 * 07..06 BGR[9..8] Baud rate bits 9..8
3361 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3362 * 04 SSEL Clock source select, 1=submode b
3363 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3364 * 02 RWX Read/Write Exchange 0=disabled
3365 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3366 * 00 DIV, data inversion 0=disabled, 1=enabled
3371 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3372 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3376 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3378 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3380 write_reg(info
, CHA
+ CCR2
, val
);
3384 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3385 * 05 EPT Enable preamble transmission, 1=enabled
3386 * 04 RADD Receive address pushed to FIFO, 0=disabled
3387 * 03 CRL CRC Reset Level, 0=FFFF
3388 * 02 RCRC Rx CRC 0=On 1=Off
3389 * 01 TCRC Tx CRC 0=On 1=Off
3390 * 00 PSD DPLL Phase Shift Disable
3395 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3397 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3399 switch (info
->params
.preamble_length
)
3401 case HDLC_PREAMBLE_LENGTH_16BITS
:
3404 case HDLC_PREAMBLE_LENGTH_32BITS
:
3407 case HDLC_PREAMBLE_LENGTH_64BITS
:
3411 write_reg(info
, CHA
+ CCR3
, val
);
3413 /* PRE - Preamble pattern */
3415 switch (info
->params
.preamble
)
3417 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3418 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3419 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3420 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3422 write_reg(info
, CHA
+ PRE
, val
);
3426 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3427 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3428 * 05 TST1 Test Pin, 0=normal operation
3429 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3430 * 03..02 Reserved, must be 0
3431 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3436 write_reg(info
, CHA
+ CCR4
, val
);
3437 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3438 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3440 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3442 /* RLCR Receive length check register
3444 * 7 1=enable receive length check
3445 * 6..0 Max frame length = (RL + 1) * 32
3447 write_reg(info
, CHA
+ RLCR
, 0);
3449 /* XBCH Transmit Byte Count High
3451 * 07 DMA mode, 0 = interrupt driven
3452 * 06 NRM, 0=ABM (ignored)
3453 * 05 CAS Carrier Auto Start
3454 * 04 XC Transmit Continuously (ignored)
3455 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3460 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3462 write_reg(info
, CHA
+ XBCH
, val
);
3463 enable_auxclk(info
);
3464 if (info
->params
.loopback
|| info
->testing_irq
)
3465 loopback_enable(info
);
3466 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3468 irq_enable(info
, CHB
, IRQ_CTS
);
3469 /* PVR[3] 1=AUTO CTS active */
3470 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3472 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3474 irq_enable(info
, CHA
,
3475 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3476 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3477 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3478 wait_command_complete(info
, CHA
);
3479 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3481 /* Master clock mode enabled above to allow reset commands
3482 * to complete even if no data clocks are present.
3484 * Disable master clock mode for normal communications because
3485 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3486 * IRQ when in master clock mode.
3488 * Leave master clock mode enabled for IRQ test because the
3489 * timer IRQ used by the test can only happen in master clock mode.
3491 if (!info
->testing_irq
)
3492 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3500 static void rx_stop(MGSLPC_INFO
*info
)
3502 if (debug_level
>= DEBUG_LEVEL_ISR
)
3503 printk("%s(%d):rx_stop(%s)\n",
3504 __FILE__
,__LINE__
, info
->device_name
);
3506 /* MODE:03 RAC Receiver Active, 0=inactive */
3507 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3509 info
->rx_enabled
= 0;
3510 info
->rx_overflow
= 0;
3513 static void rx_start(MGSLPC_INFO
*info
)
3515 if (debug_level
>= DEBUG_LEVEL_ISR
)
3516 printk("%s(%d):rx_start(%s)\n",
3517 __FILE__
,__LINE__
, info
->device_name
);
3519 rx_reset_buffers(info
);
3520 info
->rx_enabled
= 0;
3521 info
->rx_overflow
= 0;
3523 /* MODE:03 RAC Receiver Active, 1=active */
3524 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3526 info
->rx_enabled
= 1;
3529 static void tx_start(MGSLPC_INFO
*info
)
3531 if (debug_level
>= DEBUG_LEVEL_ISR
)
3532 printk("%s(%d):tx_start(%s)\n",
3533 __FILE__
,__LINE__
, info
->device_name
);
3535 if (info
->tx_count
) {
3536 /* If auto RTS enabled and RTS is inactive, then assert */
3537 /* RTS and set a flag indicating that the driver should */
3538 /* negate RTS when the transmission completes. */
3539 info
->drop_rts_on_tx_done
= 0;
3541 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3543 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3544 info
->serial_signals
|= SerialSignal_RTS
;
3546 info
->drop_rts_on_tx_done
= 1;
3550 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3551 if (!info
->tx_active
) {
3552 info
->tx_active
= 1;
3556 info
->tx_active
= 1;
3558 info
->tx_timer
.expires
= jiffies
+ msecs_to_jiffies(5000);
3559 add_timer(&info
->tx_timer
);
3563 if (!info
->tx_enabled
)
3564 info
->tx_enabled
= 1;
3567 static void tx_stop(MGSLPC_INFO
*info
)
3569 if (debug_level
>= DEBUG_LEVEL_ISR
)
3570 printk("%s(%d):tx_stop(%s)\n",
3571 __FILE__
,__LINE__
, info
->device_name
);
3573 del_timer(&info
->tx_timer
);
3575 info
->tx_enabled
= 0;
3576 info
->tx_active
= 0;
3579 /* Reset the adapter to a known state and prepare it for further use.
3581 static void reset_device(MGSLPC_INFO
*info
)
3583 /* power up both channels (set BIT7) */
3584 write_reg(info
, CHA
+ CCR0
, 0x80);
3585 write_reg(info
, CHB
+ CCR0
, 0x80);
3586 write_reg(info
, CHA
+ MODE
, 0);
3587 write_reg(info
, CHB
+ MODE
, 0);
3589 /* disable all interrupts */
3590 irq_disable(info
, CHA
, 0xffff);
3591 irq_disable(info
, CHB
, 0xffff);
3592 port_irq_disable(info
, 0xff);
3594 /* PCR Port Configuration Register
3596 * 07..04 DEC[3..0] Serial I/F select outputs
3597 * 03 output, 1=AUTO CTS control enabled
3598 * 02 RI Ring Indicator input 0=active
3599 * 01 DSR input 0=active
3600 * 00 DTR output 0=active
3604 write_reg(info
, PCR
, 0x06);
3606 /* PVR Port Value Register
3608 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3609 * 03 AUTO CTS output 1=enabled
3610 * 02 RI Ring Indicator input
3612 * 00 DTR output (1=inactive)
3616 // write_reg(info, PVR, PVR_DTR);
3618 /* IPC Interrupt Port Configuration
3620 * 07 VIS 1=Masked interrupts visible
3621 * 06..05 Reserved, 0
3622 * 04..03 SLA Slave address, 00 ignored
3623 * 02 CASM Cascading Mode, 1=daisy chain
3624 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3628 write_reg(info
, IPC
, 0x05);
3631 static void async_mode(MGSLPC_INFO
*info
)
3635 /* disable all interrupts */
3636 irq_disable(info
, CHA
, 0xffff);
3637 irq_disable(info
, CHB
, 0xffff);
3638 port_irq_disable(info
, 0xff);
3643 * 06 FRTS RTS State, 0=active
3644 * 05 FCTS Flow Control on CTS
3645 * 04 FLON Flow Control Enable
3646 * 03 RAC Receiver Active, 0 = inactive
3647 * 02 RTS 0=Auto RTS, 1=manual RTS
3648 * 01 TRS Timer Resolution, 1=512
3649 * 00 TLP Test Loop, 0 = no loop
3654 if (info
->params
.loopback
)
3657 /* preserve RTS state */
3658 if (!(info
->serial_signals
& SerialSignal_RTS
))
3660 write_reg(info
, CHA
+ MODE
, val
);
3664 * 07 PU Power Up, 1=active, 0=power down
3665 * 06 MCE Master Clock Enable, 1=enabled
3667 * 04..02 SC[2..0] Encoding, 000=NRZ
3668 * 01..00 SM[1..0] Serial Mode, 11=Async
3672 write_reg(info
, CHA
+ CCR0
, 0x83);
3676 * 07..05 Reserved, 0
3677 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3678 * 03 BCR Bit Clock Rate, 1=16x
3679 * 02..00 CM[2..0] Clock Mode, 111=BRG
3683 write_reg(info
, CHA
+ CCR1
, 0x1f);
3687 * 07..06 BGR[9..8] Baud rate bits 9..8
3688 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3689 * 04 SSEL Clock source select, 1=submode b
3690 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3691 * 02 RWX Read/Write Exchange 0=disabled
3693 * 00 DIV, data inversion 0=disabled, 1=enabled
3697 write_reg(info
, CHA
+ CCR2
, 0x10);
3701 * 07..01 Reserved, 0
3702 * 00 PSD DPLL Phase Shift Disable
3706 write_reg(info
, CHA
+ CCR3
, 0);
3710 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3711 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3712 * 05 TST1 Test Pin, 0=normal operation
3713 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3714 * 03..00 Reserved, must be 0
3718 write_reg(info
, CHA
+ CCR4
, 0x50);
3719 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3724 * 06 XBRK transmit break, 0=normal operation
3725 * 05 Stop bits (0=1, 1=2)
3726 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3727 * 02 PAREN Parity Enable
3728 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3732 if (info
->params
.data_bits
!= 8)
3733 val
|= BIT0
; /* 7 bits */
3734 if (info
->params
.stop_bits
!= 1)
3736 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3738 val
|= BIT2
; /* Parity enable */
3739 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3744 write_reg(info
, CHA
+ DAFO
, val
);
3746 /* RFC Rx FIFO Control
3749 * 06 DPS, 1=parity bit not stored in data byte
3750 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3751 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3752 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3754 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3758 write_reg(info
, CHA
+ RFC
, 0x5c);
3760 /* RLCR Receive length check register
3762 * Max frame length = (RL + 1) * 32
3764 write_reg(info
, CHA
+ RLCR
, 0);
3766 /* XBCH Transmit Byte Count High
3768 * 07 DMA mode, 0 = interrupt driven
3769 * 06 NRM, 0=ABM (ignored)
3770 * 05 CAS Carrier Auto Start
3771 * 04 XC Transmit Continuously (ignored)
3772 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3777 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3779 write_reg(info
, CHA
+ XBCH
, val
);
3780 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3781 irq_enable(info
, CHA
, IRQ_CTS
);
3783 /* MODE:03 RAC Receiver Active, 1=active */
3784 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3785 enable_auxclk(info
);
3786 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3787 irq_enable(info
, CHB
, IRQ_CTS
);
3788 /* PVR[3] 1=AUTO CTS active */
3789 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3791 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3792 irq_enable(info
, CHA
,
3793 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3794 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3795 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3796 wait_command_complete(info
, CHA
);
3797 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3800 /* Set the HDLC idle mode for the transmitter.
3802 static void tx_set_idle(MGSLPC_INFO
*info
)
3804 /* Note: ESCC2 only supports flags and one idle modes */
3805 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3806 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3808 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3811 /* get state of the V24 status (input) signals.
3813 static void get_signals(MGSLPC_INFO
*info
)
3815 unsigned char status
= 0;
3817 /* preserve DTR and RTS */
3818 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3820 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3821 info
->serial_signals
|= SerialSignal_DCD
;
3822 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3823 info
->serial_signals
|= SerialSignal_CTS
;
3825 status
= read_reg(info
, CHA
+ PVR
);
3826 if (!(status
& PVR_RI
))
3827 info
->serial_signals
|= SerialSignal_RI
;
3828 if (!(status
& PVR_DSR
))
3829 info
->serial_signals
|= SerialSignal_DSR
;
3832 /* Set the state of DTR and RTS based on contents of
3833 * serial_signals member of device extension.
3835 static void set_signals(MGSLPC_INFO
*info
)
3839 val
= read_reg(info
, CHA
+ MODE
);
3840 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3841 if (info
->serial_signals
& SerialSignal_RTS
)
3846 if (info
->serial_signals
& SerialSignal_RTS
)
3851 write_reg(info
, CHA
+ MODE
, val
);
3853 if (info
->serial_signals
& SerialSignal_DTR
)
3854 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3856 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3859 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3866 info
->rx_frame_count
= 0;
3867 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3868 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3869 buf
->status
= buf
->count
= 0;
3873 /* Attempt to return a received HDLC frame
3874 * Only frames received without errors are returned.
3876 * Returns 1 if frame returned, otherwise 0
3878 static int rx_get_frame(MGSLPC_INFO
*info
)
3880 unsigned short status
;
3882 unsigned int framesize
= 0;
3883 unsigned long flags
;
3884 struct tty_struct
*tty
= info
->tty
;
3885 int return_frame
= 0;
3887 if (info
->rx_frame_count
== 0)
3890 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3892 status
= buf
->status
;
3894 /* 07 VFR 1=valid frame
3895 * 06 RDO 1=data overrun
3896 * 05 CRC 1=OK, 0=error
3897 * 04 RAB 1=frame aborted
3899 if ((status
& 0xf0) != 0xA0) {
3900 if (!(status
& BIT7
) || (status
& BIT4
))
3901 info
->icount
.rxabort
++;
3902 else if (status
& BIT6
)
3903 info
->icount
.rxover
++;
3904 else if (!(status
& BIT5
)) {
3905 info
->icount
.rxcrc
++;
3906 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3912 struct net_device_stats
*stats
= hdlc_stats(info
->netdev
);
3914 stats
->rx_frame_errors
++;
3921 framesize
= buf
->count
;
3923 if (debug_level
>= DEBUG_LEVEL_BH
)
3924 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3925 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
3927 if (debug_level
>= DEBUG_LEVEL_DATA
)
3928 trace_block(info
, buf
->data
, framesize
, 0);
3931 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3932 framesize
+1 > info
->max_frame_size
) ||
3933 framesize
> info
->max_frame_size
)
3934 info
->icount
.rxlong
++;
3937 info
->icount
.rxok
++;
3939 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3940 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3946 hdlcdev_rx(info
, buf
->data
, framesize
);
3949 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3953 spin_lock_irqsave(&info
->lock
,flags
);
3954 buf
->status
= buf
->count
= 0;
3955 info
->rx_frame_count
--;
3957 if (info
->rx_get
>= info
->rx_buf_count
)
3959 spin_unlock_irqrestore(&info
->lock
,flags
);
3964 static BOOLEAN
register_test(MGSLPC_INFO
*info
)
3966 static unsigned char patterns
[] =
3967 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3968 static unsigned int count
= ARRAY_SIZE(patterns
);
3971 unsigned long flags
;
3973 spin_lock_irqsave(&info
->lock
,flags
);
3976 for (i
= 0; i
< count
; i
++) {
3977 write_reg(info
, XAD1
, patterns
[i
]);
3978 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3979 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3980 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3986 spin_unlock_irqrestore(&info
->lock
,flags
);
3990 static BOOLEAN
irq_test(MGSLPC_INFO
*info
)
3992 unsigned long end_time
;
3993 unsigned long flags
;
3995 spin_lock_irqsave(&info
->lock
,flags
);
3998 info
->testing_irq
= TRUE
;
4001 info
->irq_occurred
= FALSE
;
4003 /* init hdlc mode */
4005 irq_enable(info
, CHA
, IRQ_TIMER
);
4006 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
4007 issue_command(info
, CHA
, CMD_START_TIMER
);
4009 spin_unlock_irqrestore(&info
->lock
,flags
);
4012 while(end_time
-- && !info
->irq_occurred
) {
4013 msleep_interruptible(10);
4016 info
->testing_irq
= FALSE
;
4018 spin_lock_irqsave(&info
->lock
,flags
);
4020 spin_unlock_irqrestore(&info
->lock
,flags
);
4022 return info
->irq_occurred
? TRUE
: FALSE
;
4025 static int adapter_test(MGSLPC_INFO
*info
)
4027 if (!register_test(info
)) {
4028 info
->init_error
= DiagStatus_AddressFailure
;
4029 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4030 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
4034 if (!irq_test(info
)) {
4035 info
->init_error
= DiagStatus_IrqFailure
;
4036 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4037 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
4041 if (debug_level
>= DEBUG_LEVEL_INFO
)
4042 printk("%s(%d):device %s passed diagnostics\n",
4043 __FILE__
,__LINE__
,info
->device_name
);
4047 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
4052 printk("%s tx data:\n",info
->device_name
);
4054 printk("%s rx data:\n",info
->device_name
);
4062 for(i
=0;i
<linecount
;i
++)
4063 printk("%02X ",(unsigned char)data
[i
]);
4066 for(i
=0;i
<linecount
;i
++) {
4067 if (data
[i
]>=040 && data
[i
]<=0176)
4068 printk("%c",data
[i
]);
4079 /* HDLC frame time out
4080 * update stats and do tx completion processing
4082 static void tx_timeout(unsigned long context
)
4084 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
4085 unsigned long flags
;
4087 if ( debug_level
>= DEBUG_LEVEL_INFO
)
4088 printk( "%s(%d):tx_timeout(%s)\n",
4089 __FILE__
,__LINE__
,info
->device_name
);
4090 if(info
->tx_active
&&
4091 info
->params
.mode
== MGSL_MODE_HDLC
) {
4092 info
->icount
.txtimeout
++;
4094 spin_lock_irqsave(&info
->lock
,flags
);
4095 info
->tx_active
= 0;
4096 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
4098 spin_unlock_irqrestore(&info
->lock
,flags
);
4102 hdlcdev_tx_done(info
);
4111 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4112 * set encoding and frame check sequence (FCS) options
4114 * dev pointer to network device structure
4115 * encoding serial encoding setting
4116 * parity FCS setting
4118 * returns 0 if success, otherwise error code
4120 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
4121 unsigned short parity
)
4123 MGSLPC_INFO
*info
= dev_to_port(dev
);
4124 unsigned char new_encoding
;
4125 unsigned short new_crctype
;
4127 /* return error if TTY interface open */
4133 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
4134 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
4135 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
4136 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
4137 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
4138 default: return -EINVAL
;
4143 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
4144 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
4145 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
4146 default: return -EINVAL
;
4149 info
->params
.encoding
= new_encoding
;
4150 info
->params
.crc_type
= new_crctype
;
4152 /* if network interface up, reprogram hardware */
4154 mgslpc_program_hw(info
);
4160 * called by generic HDLC layer to send frame
4162 * skb socket buffer containing HDLC frame
4163 * dev pointer to network device structure
4165 * returns 0 if success, otherwise error code
4167 static int hdlcdev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4169 MGSLPC_INFO
*info
= dev_to_port(dev
);
4170 struct net_device_stats
*stats
= hdlc_stats(dev
);
4171 unsigned long flags
;
4173 if (debug_level
>= DEBUG_LEVEL_INFO
)
4174 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
4176 /* stop sending until this frame completes */
4177 netif_stop_queue(dev
);
4179 /* copy data to device buffers */
4180 memcpy(info
->tx_buf
, skb
->data
, skb
->len
);
4182 info
->tx_put
= info
->tx_count
= skb
->len
;
4184 /* update network statistics */
4185 stats
->tx_packets
++;
4186 stats
->tx_bytes
+= skb
->len
;
4188 /* done with socket buffer, so free it */
4191 /* save start time for transmit timeout detection */
4192 dev
->trans_start
= jiffies
;
4194 /* start hardware transmitter if necessary */
4195 spin_lock_irqsave(&info
->lock
,flags
);
4196 if (!info
->tx_active
)
4198 spin_unlock_irqrestore(&info
->lock
,flags
);
4204 * called by network layer when interface enabled
4205 * claim resources and initialize hardware
4207 * dev pointer to network device structure
4209 * returns 0 if success, otherwise error code
4211 static int hdlcdev_open(struct net_device
*dev
)
4213 MGSLPC_INFO
*info
= dev_to_port(dev
);
4215 unsigned long flags
;
4217 if (debug_level
>= DEBUG_LEVEL_INFO
)
4218 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
4220 /* generic HDLC layer open processing */
4221 if ((rc
= hdlc_open(dev
)))
4224 /* arbitrate between network and tty opens */
4225 spin_lock_irqsave(&info
->netlock
, flags
);
4226 if (info
->count
!= 0 || info
->netcount
!= 0) {
4227 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
4228 spin_unlock_irqrestore(&info
->netlock
, flags
);
4232 spin_unlock_irqrestore(&info
->netlock
, flags
);
4234 /* claim resources and init adapter */
4235 if ((rc
= startup(info
)) != 0) {
4236 spin_lock_irqsave(&info
->netlock
, flags
);
4238 spin_unlock_irqrestore(&info
->netlock
, flags
);
4242 /* assert DTR and RTS, apply hardware settings */
4243 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4244 mgslpc_program_hw(info
);
4246 /* enable network layer transmit */
4247 dev
->trans_start
= jiffies
;
4248 netif_start_queue(dev
);
4250 /* inform generic HDLC layer of current DCD status */
4251 spin_lock_irqsave(&info
->lock
, flags
);
4253 spin_unlock_irqrestore(&info
->lock
, flags
);
4254 hdlc_set_carrier(info
->serial_signals
& SerialSignal_DCD
, dev
);
4260 * called by network layer when interface is disabled
4261 * shutdown hardware and release resources
4263 * dev pointer to network device structure
4265 * returns 0 if success, otherwise error code
4267 static int hdlcdev_close(struct net_device
*dev
)
4269 MGSLPC_INFO
*info
= dev_to_port(dev
);
4270 unsigned long flags
;
4272 if (debug_level
>= DEBUG_LEVEL_INFO
)
4273 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4275 netif_stop_queue(dev
);
4277 /* shutdown adapter and release resources */
4282 spin_lock_irqsave(&info
->netlock
, flags
);
4284 spin_unlock_irqrestore(&info
->netlock
, flags
);
4290 * called by network layer to process IOCTL call to network device
4292 * dev pointer to network device structure
4293 * ifr pointer to network interface request structure
4294 * cmd IOCTL command code
4296 * returns 0 if success, otherwise error code
4298 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4300 const size_t size
= sizeof(sync_serial_settings
);
4301 sync_serial_settings new_line
;
4302 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4303 MGSLPC_INFO
*info
= dev_to_port(dev
);
4306 if (debug_level
>= DEBUG_LEVEL_INFO
)
4307 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4309 /* return error if TTY interface open */
4313 if (cmd
!= SIOCWANDEV
)
4314 return hdlc_ioctl(dev
, ifr
, cmd
);
4316 switch(ifr
->ifr_settings
.type
) {
4317 case IF_GET_IFACE
: /* return current sync_serial_settings */
4319 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4320 if (ifr
->ifr_settings
.size
< size
) {
4321 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4325 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4326 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4327 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4328 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4331 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4332 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4333 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4334 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4335 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4338 new_line
.clock_rate
= info
->params
.clock_speed
;
4339 new_line
.loopback
= info
->params
.loopback
? 1:0;
4341 if (copy_to_user(line
, &new_line
, size
))
4345 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4347 if(!capable(CAP_NET_ADMIN
))
4349 if (copy_from_user(&new_line
, line
, size
))
4352 switch (new_line
.clock_type
)
4354 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4355 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4356 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4357 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4358 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4359 (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
); break;
4363 default: return -EINVAL
;
4366 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4369 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4370 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4371 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4372 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4373 info
->params
.flags
|= flags
;
4375 info
->params
.loopback
= new_line
.loopback
;
4377 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4378 info
->params
.clock_speed
= new_line
.clock_rate
;
4380 info
->params
.clock_speed
= 0;
4382 /* if network interface up, reprogram hardware */
4384 mgslpc_program_hw(info
);
4388 return hdlc_ioctl(dev
, ifr
, cmd
);
4393 * called by network layer when transmit timeout is detected
4395 * dev pointer to network device structure
4397 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4399 MGSLPC_INFO
*info
= dev_to_port(dev
);
4400 struct net_device_stats
*stats
= hdlc_stats(dev
);
4401 unsigned long flags
;
4403 if (debug_level
>= DEBUG_LEVEL_INFO
)
4404 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4407 stats
->tx_aborted_errors
++;
4409 spin_lock_irqsave(&info
->lock
,flags
);
4411 spin_unlock_irqrestore(&info
->lock
,flags
);
4413 netif_wake_queue(dev
);
4417 * called by device driver when transmit completes
4418 * reenable network layer transmit if stopped
4420 * info pointer to device instance information
4422 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4424 if (netif_queue_stopped(info
->netdev
))
4425 netif_wake_queue(info
->netdev
);
4429 * called by device driver when frame received
4430 * pass frame to network layer
4432 * info pointer to device instance information
4433 * buf pointer to buffer contianing frame data
4434 * size count of data bytes in buf
4436 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4438 struct sk_buff
*skb
= dev_alloc_skb(size
);
4439 struct net_device
*dev
= info
->netdev
;
4440 struct net_device_stats
*stats
= hdlc_stats(dev
);
4442 if (debug_level
>= DEBUG_LEVEL_INFO
)
4443 printk("hdlcdev_rx(%s)\n",dev
->name
);
4446 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4447 stats
->rx_dropped
++;
4451 memcpy(skb_put(skb
, size
),buf
,size
);
4453 skb
->protocol
= hdlc_type_trans(skb
, info
->netdev
);
4455 stats
->rx_packets
++;
4456 stats
->rx_bytes
+= size
;
4460 info
->netdev
->last_rx
= jiffies
;
4464 * called by device driver when adding device instance
4465 * do generic HDLC initialization
4467 * info pointer to device instance information
4469 * returns 0 if success, otherwise error code
4471 static int hdlcdev_init(MGSLPC_INFO
*info
)
4474 struct net_device
*dev
;
4477 /* allocate and initialize network and HDLC layer objects */
4479 if (!(dev
= alloc_hdlcdev(info
))) {
4480 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4484 /* for network layer reporting purposes only */
4485 dev
->base_addr
= info
->io_base
;
4486 dev
->irq
= info
->irq_level
;
4488 /* network layer callbacks and settings */
4489 dev
->do_ioctl
= hdlcdev_ioctl
;
4490 dev
->open
= hdlcdev_open
;
4491 dev
->stop
= hdlcdev_close
;
4492 dev
->tx_timeout
= hdlcdev_tx_timeout
;
4493 dev
->watchdog_timeo
= 10*HZ
;
4494 dev
->tx_queue_len
= 50;
4496 /* generic HDLC layer callbacks and settings */
4497 hdlc
= dev_to_hdlc(dev
);
4498 hdlc
->attach
= hdlcdev_attach
;
4499 hdlc
->xmit
= hdlcdev_xmit
;
4501 /* register objects with HDLC layer */
4502 if ((rc
= register_hdlc_device(dev
))) {
4503 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4513 * called by device driver when removing device instance
4514 * do generic HDLC cleanup
4516 * info pointer to device instance information
4518 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4520 unregister_hdlc_device(info
->netdev
);
4521 free_netdev(info
->netdev
);
4522 info
->netdev
= NULL
;
4525 #endif /* CONFIG_HDLC */