2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
6 * Device driver for Microgate SyncLink PC Card
7 * multiprotocol serial adapter.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * This code is released under the GNU General Public License (GPL)
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
31 # define BREAKPOINT() asm(" int $3");
33 # define BREAKPOINT() { }
36 #define MAX_DEVICE_COUNT 4
38 #include <linux/module.h>
39 #include <linux/errno.h>
40 #include <linux/signal.h>
41 #include <linux/sched.h>
42 #include <linux/timer.h>
43 #include <linux/time.h>
44 #include <linux/interrupt.h>
45 #include <linux/pci.h>
46 #include <linux/tty.h>
47 #include <linux/tty_flip.h>
48 #include <linux/serial.h>
49 #include <linux/major.h>
50 #include <linux/string.h>
51 #include <linux/fcntl.h>
52 #include <linux/ptrace.h>
53 #include <linux/ioport.h>
55 #include <linux/slab.h>
56 #include <linux/netdevice.h>
57 #include <linux/vmalloc.h>
58 #include <linux/init.h>
59 #include <linux/delay.h>
60 #include <linux/ioctl.h>
62 #include <asm/system.h>
66 #include <linux/bitops.h>
67 #include <asm/types.h>
68 #include <linux/termios.h>
69 #include <linux/workqueue.h>
70 #include <linux/hdlc.h>
72 #include <pcmcia/cs_types.h>
73 #include <pcmcia/cs.h>
74 #include <pcmcia/cistpl.h>
75 #include <pcmcia/cisreg.h>
76 #include <pcmcia/ds.h>
78 #ifdef CONFIG_HDLC_MODULE
82 #define GET_USER(error,value,addr) error = get_user(value,addr)
83 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
84 #define PUT_USER(error,value,addr) error = put_user(value,addr)
85 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
87 #include <asm/uaccess.h>
89 #include "linux/synclink.h"
91 static MGSL_PARAMS default_params
= {
92 MGSL_MODE_HDLC
, /* unsigned long mode */
93 0, /* unsigned char loopback; */
94 HDLC_FLAG_UNDERRUN_ABORT15
, /* unsigned short flags; */
95 HDLC_ENCODING_NRZI_SPACE
, /* unsigned char encoding; */
96 0, /* unsigned long clock_speed; */
97 0xff, /* unsigned char addr_filter; */
98 HDLC_CRC_16_CCITT
, /* unsigned short crc_type; */
99 HDLC_PREAMBLE_LENGTH_8BITS
, /* unsigned char preamble_length; */
100 HDLC_PREAMBLE_PATTERN_NONE
, /* unsigned char preamble; */
101 9600, /* unsigned long data_rate; */
102 8, /* unsigned char data_bits; */
103 1, /* unsigned char stop_bits; */
104 ASYNC_PARITY_NONE
/* unsigned char parity; */
110 unsigned char status
;
114 /* The queue of BH actions to be performed */
117 #define BH_TRANSMIT 2
120 #define IO_PIN_SHUTDOWN_LIMIT 100
122 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
124 struct _input_signal_events
{
137 * Device instance data structure
140 typedef struct _mgslpc_info
{
141 void *if_ptr
; /* General purpose pointer (used by SPPP) */
144 int count
; /* count of opens */
146 unsigned short close_delay
;
147 unsigned short closing_wait
; /* time to wait before closing */
149 struct mgsl_icount icount
;
151 struct tty_struct
*tty
;
153 int x_char
; /* xon/xoff character */
154 int blocked_open
; /* # of blocked opens */
155 unsigned char read_status_mask
;
156 unsigned char ignore_status_mask
;
158 unsigned char *tx_buf
;
163 /* circular list of fixed length rx buffers */
165 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
166 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
167 int rx_put
; /* index of next empty rx buffer */
168 int rx_get
; /* index of next full rx buffer */
169 int rx_buf_size
; /* size in bytes of single rx buffer */
170 int rx_buf_count
; /* total number of rx buffers */
171 int rx_frame_count
; /* number of full rx buffers */
173 wait_queue_head_t open_wait
;
174 wait_queue_head_t close_wait
;
176 wait_queue_head_t status_event_wait_q
;
177 wait_queue_head_t event_wait_q
;
178 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
179 struct _mgslpc_info
*next_device
; /* device list link */
181 unsigned short imra_value
;
182 unsigned short imrb_value
;
183 unsigned char pim_value
;
186 struct work_struct task
; /* task structure for scheduling bh */
195 int dcd_chkcount
; /* check counts to prevent */
196 int cts_chkcount
; /* too many IRQs if a signal */
197 int dsr_chkcount
; /* is floating */
208 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
210 char device_name
[25]; /* device instance name */
212 unsigned int io_base
; /* base I/O address of adapter */
213 unsigned int irq_level
;
215 MGSL_PARAMS params
; /* communications parameters */
217 unsigned char serial_signals
; /* current serial signal states */
219 char irq_occurred
; /* for diagnostics use */
221 unsigned int init_error
; /* startup error (DIAGS) */
223 char flag_buf
[MAX_ASYNC_BUFFER_SIZE
];
224 BOOLEAN drop_rts_on_tx_done
;
226 struct _input_signal_events input_signal_events
;
229 struct pcmcia_device
*p_dev
;
233 /* SPPP/Cisco HDLC device parts */
239 struct net_device
*netdev
;
244 #define MGSLPC_MAGIC 0x5402
247 * The size of the serial xmit buffer is 1 page, or 4096 bytes
249 #define TXBUFSIZE 4096
252 #define CHA 0x00 /* channel A offset */
253 #define CHB 0x40 /* channel B offset */
256 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
303 #define IRQ_BREAK_ON BIT15 // rx break detected
304 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
305 #define IRQ_ALLSENT BIT13 // all sent
306 #define IRQ_UNDERRUN BIT12 // transmit data underrun
307 #define IRQ_TIMER BIT11 // timer interrupt
308 #define IRQ_CTS BIT10 // CTS status change
309 #define IRQ_TXREPEAT BIT9 // tx message repeat
310 #define IRQ_TXFIFO BIT8 // transmit pool ready
311 #define IRQ_RXEOM BIT7 // receive message end
312 #define IRQ_EXITHUNT BIT6 // receive frame start
313 #define IRQ_RXTIME BIT6 // rx char timeout
314 #define IRQ_DCD BIT2 // carrier detect status change
315 #define IRQ_OVERRUN BIT1 // receive frame overflow
316 #define IRQ_RXFIFO BIT0 // receive pool full
320 #define XFW BIT6 // transmit FIFO write enable
321 #define CEC BIT2 // command executing
322 #define CTS BIT1 // CTS state
327 #define PVR_AUTOCTS BIT3
328 #define PVR_RS232 0x20 /* 0010b */
329 #define PVR_V35 0xe0 /* 1110b */
330 #define PVR_RS422 0x40 /* 0100b */
332 /* Register access functions */
334 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
335 #define read_reg(info, reg) inb((info)->io_base + (reg))
337 #define read_reg16(info, reg) inw((info)->io_base + (reg))
338 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
340 #define set_reg_bits(info, reg, mask) \
341 write_reg(info, (reg), \
342 (unsigned char) (read_reg(info, (reg)) | (mask)))
343 #define clear_reg_bits(info, reg, mask) \
344 write_reg(info, (reg), \
345 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
347 * interrupt enable/disable routines
349 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
351 if (channel
== CHA
) {
352 info
->imra_value
|= mask
;
353 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
355 info
->imrb_value
|= mask
;
356 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
359 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
361 if (channel
== CHA
) {
362 info
->imra_value
&= ~mask
;
363 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
365 info
->imrb_value
&= ~mask
;
366 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
370 #define port_irq_disable(info, mask) \
371 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
373 #define port_irq_enable(info, mask) \
374 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
376 static void rx_start(MGSLPC_INFO
*info
);
377 static void rx_stop(MGSLPC_INFO
*info
);
379 static void tx_start(MGSLPC_INFO
*info
);
380 static void tx_stop(MGSLPC_INFO
*info
);
381 static void tx_set_idle(MGSLPC_INFO
*info
);
383 static void get_signals(MGSLPC_INFO
*info
);
384 static void set_signals(MGSLPC_INFO
*info
);
386 static void reset_device(MGSLPC_INFO
*info
);
388 static void hdlc_mode(MGSLPC_INFO
*info
);
389 static void async_mode(MGSLPC_INFO
*info
);
391 static void tx_timeout(unsigned long context
);
393 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
);
396 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
397 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
398 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
399 static int hdlcdev_init(MGSLPC_INFO
*info
);
400 static void hdlcdev_exit(MGSLPC_INFO
*info
);
403 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
405 static BOOLEAN
register_test(MGSLPC_INFO
*info
);
406 static BOOLEAN
irq_test(MGSLPC_INFO
*info
);
407 static int adapter_test(MGSLPC_INFO
*info
);
409 static int claim_resources(MGSLPC_INFO
*info
);
410 static void release_resources(MGSLPC_INFO
*info
);
411 static void mgslpc_add_device(MGSLPC_INFO
*info
);
412 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
414 static int rx_get_frame(MGSLPC_INFO
*info
);
415 static void rx_reset_buffers(MGSLPC_INFO
*info
);
416 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
417 static void rx_free_buffers(MGSLPC_INFO
*info
);
419 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
);
422 * Bottom half interrupt handlers
424 static void bh_handler(struct work_struct
*work
);
425 static void bh_transmit(MGSLPC_INFO
*info
);
426 static void bh_status(MGSLPC_INFO
*info
);
431 static int tiocmget(struct tty_struct
*tty
, struct file
*file
);
432 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
433 unsigned int set
, unsigned int clear
);
434 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
435 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
436 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
);
437 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
438 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
439 static int set_txenable(MGSLPC_INFO
*info
, int enable
);
440 static int tx_abort(MGSLPC_INFO
*info
);
441 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
442 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
444 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
445 static int mgslpc_device_count
= 0;
448 * Set this param to non-zero to load eax with the
449 * .text section address and breakpoint on module load.
450 * This is useful for use with gdb and add-symbol-file command.
452 static int break_on_load
=0;
455 * Driver major number, defaults to zero to get auto
456 * assigned major number. May be forced as module parameter.
458 static int ttymajor
=0;
460 static int debug_level
= 0;
461 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
462 static int dosyncppp
[MAX_DEVICE_COUNT
] = {1,1,1,1};
464 module_param(break_on_load
, bool, 0);
465 module_param(ttymajor
, int, 0);
466 module_param(debug_level
, int, 0);
467 module_param_array(maxframe
, int, NULL
, 0);
468 module_param_array(dosyncppp
, int, NULL
, 0);
470 MODULE_LICENSE("GPL");
472 static char *driver_name
= "SyncLink PC Card driver";
473 static char *driver_version
= "$Revision: 4.34 $";
475 static struct tty_driver
*serial_driver
;
477 /* number of characters left in xmit buffer before we ask for more */
478 #define WAKEUP_CHARS 256
480 static void mgslpc_change_params(MGSLPC_INFO
*info
);
481 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
483 /* PCMCIA prototypes */
485 static int mgslpc_config(struct pcmcia_device
*link
);
486 static void mgslpc_release(u_long arg
);
487 static void mgslpc_detach(struct pcmcia_device
*p_dev
);
490 * 1st function defined in .text section. Calling this function in
491 * init_module() followed by a breakpoint allows a remote debugger
492 * (gdb) to get the .text address for the add-symbol-file command.
493 * This allows remote debugging of dynamically loadable modules.
495 static void* mgslpc_get_text_ptr(void)
497 return mgslpc_get_text_ptr
;
501 * line discipline callback wrappers
503 * The wrappers maintain line discipline references
504 * while calling into the line discipline.
506 * ldisc_flush_buffer - flush line discipline receive buffers
507 * ldisc_receive_buf - pass receive data to line discipline
510 static void ldisc_flush_buffer(struct tty_struct
*tty
)
512 struct tty_ldisc
*ld
= tty_ldisc_ref(tty
);
514 if (ld
->flush_buffer
)
515 ld
->flush_buffer(tty
);
520 static void ldisc_receive_buf(struct tty_struct
*tty
,
521 const __u8
*data
, char *flags
, int count
)
523 struct tty_ldisc
*ld
;
526 ld
= tty_ldisc_ref(tty
);
529 ld
->receive_buf(tty
, data
, flags
, count
);
534 static int mgslpc_probe(struct pcmcia_device
*link
)
539 if (debug_level
>= DEBUG_LEVEL_INFO
)
540 printk("mgslpc_attach\n");
542 info
= (MGSLPC_INFO
*)kmalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
544 printk("Error can't allocate device instance data\n");
548 memset(info
, 0, sizeof(MGSLPC_INFO
));
549 info
->magic
= MGSLPC_MAGIC
;
550 INIT_WORK(&info
->task
, bh_handler
);
551 info
->max_frame_size
= 4096;
552 info
->close_delay
= 5*HZ
/10;
553 info
->closing_wait
= 30*HZ
;
554 init_waitqueue_head(&info
->open_wait
);
555 init_waitqueue_head(&info
->close_wait
);
556 init_waitqueue_head(&info
->status_event_wait_q
);
557 init_waitqueue_head(&info
->event_wait_q
);
558 spin_lock_init(&info
->lock
);
559 spin_lock_init(&info
->netlock
);
560 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
561 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
562 info
->imra_value
= 0xffff;
563 info
->imrb_value
= 0xffff;
564 info
->pim_value
= 0xff;
569 /* Initialize the struct pcmcia_device structure */
571 /* Interrupt setup */
572 link
->irq
.Attributes
= IRQ_TYPE_EXCLUSIVE
;
573 link
->irq
.IRQInfo1
= IRQ_LEVEL_ID
;
574 link
->irq
.Handler
= NULL
;
576 link
->conf
.Attributes
= 0;
577 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
579 ret
= mgslpc_config(link
);
583 mgslpc_add_device(info
);
588 /* Card has been inserted.
591 #define CS_CHECK(fn, ret) \
592 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
594 static int mgslpc_config(struct pcmcia_device
*link
)
596 MGSLPC_INFO
*info
= link
->priv
;
599 int last_fn
, last_ret
;
601 cistpl_cftable_entry_t dflt
= { 0 };
602 cistpl_cftable_entry_t
*cfg
;
604 if (debug_level
>= DEBUG_LEVEL_INFO
)
605 printk("mgslpc_config(0x%p)\n", link
);
607 /* read CONFIG tuple to find its configuration registers */
608 tuple
.DesiredTuple
= CISTPL_CONFIG
;
609 tuple
.Attributes
= 0;
610 tuple
.TupleData
= buf
;
611 tuple
.TupleDataMax
= sizeof(buf
);
612 tuple
.TupleOffset
= 0;
613 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(link
, &tuple
));
614 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(link
, &tuple
));
615 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(link
, &tuple
, &parse
));
616 link
->conf
.ConfigBase
= parse
.config
.base
;
617 link
->conf
.Present
= parse
.config
.rmask
[0];
619 /* get CIS configuration entry */
621 tuple
.DesiredTuple
= CISTPL_CFTABLE_ENTRY
;
622 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(link
, &tuple
));
624 cfg
= &(parse
.cftable_entry
);
625 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(link
, &tuple
));
626 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(link
, &tuple
, &parse
));
628 if (cfg
->flags
& CISTPL_CFTABLE_DEFAULT
) dflt
= *cfg
;
632 link
->conf
.ConfigIndex
= cfg
->index
;
633 link
->conf
.Attributes
|= CONF_ENABLE_IRQ
;
635 /* IO window settings */
636 link
->io
.NumPorts1
= 0;
637 if ((cfg
->io
.nwin
> 0) || (dflt
.io
.nwin
> 0)) {
638 cistpl_io_t
*io
= (cfg
->io
.nwin
) ? &cfg
->io
: &dflt
.io
;
639 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_AUTO
;
640 if (!(io
->flags
& CISTPL_IO_8BIT
))
641 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_16
;
642 if (!(io
->flags
& CISTPL_IO_16BIT
))
643 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_8
;
644 link
->io
.IOAddrLines
= io
->flags
& CISTPL_IO_LINES_MASK
;
645 link
->io
.BasePort1
= io
->win
[0].base
;
646 link
->io
.NumPorts1
= io
->win
[0].len
;
647 CS_CHECK(RequestIO
, pcmcia_request_io(link
, &link
->io
));
650 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
651 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
652 link
->conf
.ConfigIndex
= 8;
653 link
->conf
.Present
= PRESENT_OPTION
;
655 link
->irq
.Attributes
|= IRQ_HANDLE_PRESENT
;
656 link
->irq
.Handler
= mgslpc_isr
;
657 link
->irq
.Instance
= info
;
658 CS_CHECK(RequestIRQ
, pcmcia_request_irq(link
, &link
->irq
));
660 CS_CHECK(RequestConfiguration
, pcmcia_request_configuration(link
, &link
->conf
));
662 info
->io_base
= link
->io
.BasePort1
;
663 info
->irq_level
= link
->irq
.AssignedIRQ
;
665 /* add to linked list of devices */
666 sprintf(info
->node
.dev_name
, "mgslpc0");
667 info
->node
.major
= info
->node
.minor
= 0;
668 link
->dev_node
= &info
->node
;
670 printk(KERN_INFO
"%s: index 0x%02x:",
671 info
->node
.dev_name
, link
->conf
.ConfigIndex
);
672 if (link
->conf
.Attributes
& CONF_ENABLE_IRQ
)
673 printk(", irq %d", link
->irq
.AssignedIRQ
);
674 if (link
->io
.NumPorts1
)
675 printk(", io 0x%04x-0x%04x", link
->io
.BasePort1
,
676 link
->io
.BasePort1
+link
->io
.NumPorts1
-1);
681 cs_error(link
, last_fn
, last_ret
);
682 mgslpc_release((u_long
)link
);
686 /* Card has been removed.
687 * Unregister device and release PCMCIA configuration.
688 * If device is open, postpone until it is closed.
690 static void mgslpc_release(u_long arg
)
692 struct pcmcia_device
*link
= (struct pcmcia_device
*)arg
;
694 if (debug_level
>= DEBUG_LEVEL_INFO
)
695 printk("mgslpc_release(0x%p)\n", link
);
697 pcmcia_disable_device(link
);
700 static void mgslpc_detach(struct pcmcia_device
*link
)
702 if (debug_level
>= DEBUG_LEVEL_INFO
)
703 printk("mgslpc_detach(0x%p)\n", link
);
705 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
706 mgslpc_release((u_long
)link
);
708 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
711 static int mgslpc_suspend(struct pcmcia_device
*link
)
713 MGSLPC_INFO
*info
= link
->priv
;
720 static int mgslpc_resume(struct pcmcia_device
*link
)
722 MGSLPC_INFO
*info
= link
->priv
;
730 static inline int mgslpc_paranoia_check(MGSLPC_INFO
*info
,
731 char *name
, const char *routine
)
733 #ifdef MGSLPC_PARANOIA_CHECK
734 static const char *badmagic
=
735 "Warning: bad magic number for mgsl struct (%s) in %s\n";
736 static const char *badinfo
=
737 "Warning: null mgslpc_info for (%s) in %s\n";
740 printk(badinfo
, name
, routine
);
743 if (info
->magic
!= MGSLPC_MAGIC
) {
744 printk(badmagic
, name
, routine
);
755 #define CMD_RXFIFO BIT7 // release current rx FIFO
756 #define CMD_RXRESET BIT6 // receiver reset
757 #define CMD_RXFIFO_READ BIT5
758 #define CMD_START_TIMER BIT4
759 #define CMD_TXFIFO BIT3 // release current tx FIFO
760 #define CMD_TXEOM BIT1 // transmit end message
761 #define CMD_TXRESET BIT0 // transmit reset
763 static BOOLEAN
wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
766 /* wait for command completion */
767 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
775 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
777 wait_command_complete(info
, channel
);
778 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
781 static void tx_pause(struct tty_struct
*tty
)
783 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
786 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
788 if (debug_level
>= DEBUG_LEVEL_INFO
)
789 printk("tx_pause(%s)\n",info
->device_name
);
791 spin_lock_irqsave(&info
->lock
,flags
);
792 if (info
->tx_enabled
)
794 spin_unlock_irqrestore(&info
->lock
,flags
);
797 static void tx_release(struct tty_struct
*tty
)
799 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
802 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
804 if (debug_level
>= DEBUG_LEVEL_INFO
)
805 printk("tx_release(%s)\n",info
->device_name
);
807 spin_lock_irqsave(&info
->lock
,flags
);
808 if (!info
->tx_enabled
)
810 spin_unlock_irqrestore(&info
->lock
,flags
);
813 /* Return next bottom half action to perform.
814 * or 0 if nothing to do.
816 static int bh_action(MGSLPC_INFO
*info
)
821 spin_lock_irqsave(&info
->lock
,flags
);
823 if (info
->pending_bh
& BH_RECEIVE
) {
824 info
->pending_bh
&= ~BH_RECEIVE
;
826 } else if (info
->pending_bh
& BH_TRANSMIT
) {
827 info
->pending_bh
&= ~BH_TRANSMIT
;
829 } else if (info
->pending_bh
& BH_STATUS
) {
830 info
->pending_bh
&= ~BH_STATUS
;
835 /* Mark BH routine as complete */
836 info
->bh_running
= 0;
837 info
->bh_requested
= 0;
840 spin_unlock_irqrestore(&info
->lock
,flags
);
845 static void bh_handler(struct work_struct
*work
)
847 MGSLPC_INFO
*info
= container_of(work
, MGSLPC_INFO
, task
);
853 if (debug_level
>= DEBUG_LEVEL_BH
)
854 printk( "%s(%d):bh_handler(%s) entry\n",
855 __FILE__
,__LINE__
,info
->device_name
);
857 info
->bh_running
= 1;
859 while((action
= bh_action(info
)) != 0) {
861 /* Process work item */
862 if ( debug_level
>= DEBUG_LEVEL_BH
)
863 printk( "%s(%d):bh_handler() work item action=%d\n",
864 __FILE__
,__LINE__
,action
);
869 while(rx_get_frame(info
));
878 /* unknown work item ID */
879 printk("Unknown work item ID=%08X!\n", action
);
884 if (debug_level
>= DEBUG_LEVEL_BH
)
885 printk( "%s(%d):bh_handler(%s) exit\n",
886 __FILE__
,__LINE__
,info
->device_name
);
889 static void bh_transmit(MGSLPC_INFO
*info
)
891 struct tty_struct
*tty
= info
->tty
;
892 if (debug_level
>= DEBUG_LEVEL_BH
)
893 printk("bh_transmit() entry on %s\n", info
->device_name
);
897 wake_up_interruptible(&tty
->write_wait
);
901 static void bh_status(MGSLPC_INFO
*info
)
903 info
->ri_chkcount
= 0;
904 info
->dsr_chkcount
= 0;
905 info
->dcd_chkcount
= 0;
906 info
->cts_chkcount
= 0;
909 /* eom: non-zero = end of frame */
910 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
912 unsigned char data
[2];
913 unsigned char fifo_count
, read_count
, i
;
914 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
916 if (debug_level
>= DEBUG_LEVEL_ISR
)
917 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__
,__LINE__
,eom
);
919 if (!info
->rx_enabled
)
922 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
923 /* no more free buffers */
924 issue_command(info
, CHA
, CMD_RXRESET
);
925 info
->pending_bh
|= BH_RECEIVE
;
926 info
->rx_overflow
= 1;
927 info
->icount
.buf_overrun
++;
932 /* end of frame, get FIFO count from RBCL register */
933 if (!(fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f)))
939 if (fifo_count
== 1) {
941 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
944 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
946 fifo_count
-= read_count
;
947 if (!fifo_count
&& eom
)
948 buf
->status
= data
[--read_count
];
950 for (i
= 0; i
< read_count
; i
++) {
951 if (buf
->count
>= info
->max_frame_size
) {
952 /* frame too large, reset receiver and reset current buffer */
953 issue_command(info
, CHA
, CMD_RXRESET
);
957 *(buf
->data
+ buf
->count
) = data
[i
];
960 } while (fifo_count
);
963 info
->pending_bh
|= BH_RECEIVE
;
964 info
->rx_frame_count
++;
966 if (info
->rx_put
>= info
->rx_buf_count
)
969 issue_command(info
, CHA
, CMD_RXFIFO
);
972 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
)
974 unsigned char data
, status
, flag
;
977 struct tty_struct
*tty
= info
->tty
;
978 struct mgsl_icount
*icount
= &info
->icount
;
981 /* early termination, get FIFO count from RBCL register */
982 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
984 /* Zero fifo count could mean 0 or 32 bytes available.
985 * If BIT5 of STAR is set then at least 1 byte is available.
987 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
992 tty_buffer_request_room(tty
, fifo_count
);
993 /* Flush received async data to receive data buffer. */
995 data
= read_reg(info
, CHA
+ RXFIFO
);
996 status
= read_reg(info
, CHA
+ RXFIFO
);
1002 // if no frameing/crc error then save data
1003 // BIT7:parity error
1004 // BIT6:framing error
1006 if (status
& (BIT7
+ BIT6
)) {
1012 /* discard char if tty control flags say so */
1013 if (status
& info
->ignore_status_mask
)
1016 status
&= info
->read_status_mask
;
1020 else if (status
& BIT6
)
1023 work
+= tty_insert_flip_char(tty
, data
, flag
);
1025 issue_command(info
, CHA
, CMD_RXFIFO
);
1027 if (debug_level
>= DEBUG_LEVEL_ISR
) {
1028 printk("%s(%d):rx_ready_async",
1030 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1031 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
1032 icount
->parity
,icount
->frame
,icount
->overrun
);
1036 tty_flip_buffer_push(tty
);
1040 static void tx_done(MGSLPC_INFO
*info
)
1042 if (!info
->tx_active
)
1045 info
->tx_active
= 0;
1046 info
->tx_aborting
= 0;
1048 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
1051 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1052 del_timer(&info
->tx_timer
);
1054 if (info
->drop_rts_on_tx_done
) {
1056 if (info
->serial_signals
& SerialSignal_RTS
) {
1057 info
->serial_signals
&= ~SerialSignal_RTS
;
1060 info
->drop_rts_on_tx_done
= 0;
1065 hdlcdev_tx_done(info
);
1069 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1073 info
->pending_bh
|= BH_TRANSMIT
;
1077 static void tx_ready(MGSLPC_INFO
*info
)
1079 unsigned char fifo_count
= 32;
1082 if (debug_level
>= DEBUG_LEVEL_ISR
)
1083 printk("%s(%d):tx_ready(%s)\n", __FILE__
,__LINE__
,info
->device_name
);
1085 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1086 if (!info
->tx_active
)
1089 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1093 if (!info
->tx_count
)
1094 info
->tx_active
= 0;
1097 if (!info
->tx_count
)
1100 while (info
->tx_count
&& fifo_count
) {
1101 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1104 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1106 write_reg16(info
, CHA
+ TXFIFO
,
1107 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1109 info
->tx_count
-= c
;
1110 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1114 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1115 if (info
->tx_count
< WAKEUP_CHARS
)
1116 info
->pending_bh
|= BH_TRANSMIT
;
1117 issue_command(info
, CHA
, CMD_TXFIFO
);
1120 issue_command(info
, CHA
, CMD_TXFIFO
);
1122 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1126 static void cts_change(MGSLPC_INFO
*info
)
1129 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1130 irq_disable(info
, CHB
, IRQ_CTS
);
1132 if (info
->serial_signals
& SerialSignal_CTS
)
1133 info
->input_signal_events
.cts_up
++;
1135 info
->input_signal_events
.cts_down
++;
1136 wake_up_interruptible(&info
->status_event_wait_q
);
1137 wake_up_interruptible(&info
->event_wait_q
);
1139 if (info
->flags
& ASYNC_CTS_FLOW
) {
1140 if (info
->tty
->hw_stopped
) {
1141 if (info
->serial_signals
& SerialSignal_CTS
) {
1142 if (debug_level
>= DEBUG_LEVEL_ISR
)
1143 printk("CTS tx start...");
1145 info
->tty
->hw_stopped
= 0;
1147 info
->pending_bh
|= BH_TRANSMIT
;
1151 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1152 if (debug_level
>= DEBUG_LEVEL_ISR
)
1153 printk("CTS tx stop...");
1155 info
->tty
->hw_stopped
= 1;
1160 info
->pending_bh
|= BH_STATUS
;
1163 static void dcd_change(MGSLPC_INFO
*info
)
1166 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1167 irq_disable(info
, CHB
, IRQ_DCD
);
1169 if (info
->serial_signals
& SerialSignal_DCD
) {
1170 info
->input_signal_events
.dcd_up
++;
1173 info
->input_signal_events
.dcd_down
++;
1175 if (info
->netcount
) {
1176 if (info
->serial_signals
& SerialSignal_DCD
)
1177 netif_carrier_on(info
->netdev
);
1179 netif_carrier_off(info
->netdev
);
1182 wake_up_interruptible(&info
->status_event_wait_q
);
1183 wake_up_interruptible(&info
->event_wait_q
);
1185 if (info
->flags
& ASYNC_CHECK_CD
) {
1186 if (debug_level
>= DEBUG_LEVEL_ISR
)
1187 printk("%s CD now %s...", info
->device_name
,
1188 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1189 if (info
->serial_signals
& SerialSignal_DCD
)
1190 wake_up_interruptible(&info
->open_wait
);
1192 if (debug_level
>= DEBUG_LEVEL_ISR
)
1193 printk("doing serial hangup...");
1195 tty_hangup(info
->tty
);
1198 info
->pending_bh
|= BH_STATUS
;
1201 static void dsr_change(MGSLPC_INFO
*info
)
1204 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1205 port_irq_disable(info
, PVR_DSR
);
1207 if (info
->serial_signals
& SerialSignal_DSR
)
1208 info
->input_signal_events
.dsr_up
++;
1210 info
->input_signal_events
.dsr_down
++;
1211 wake_up_interruptible(&info
->status_event_wait_q
);
1212 wake_up_interruptible(&info
->event_wait_q
);
1213 info
->pending_bh
|= BH_STATUS
;
1216 static void ri_change(MGSLPC_INFO
*info
)
1219 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1220 port_irq_disable(info
, PVR_RI
);
1222 if (info
->serial_signals
& SerialSignal_RI
)
1223 info
->input_signal_events
.ri_up
++;
1225 info
->input_signal_events
.ri_down
++;
1226 wake_up_interruptible(&info
->status_event_wait_q
);
1227 wake_up_interruptible(&info
->event_wait_q
);
1228 info
->pending_bh
|= BH_STATUS
;
1231 /* Interrupt service routine entry point.
1235 * irq interrupt number that caused interrupt
1236 * dev_id device ID supplied during interrupt registration
1238 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
)
1240 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)dev_id
;
1242 unsigned char gis
, pis
;
1245 if (debug_level
>= DEBUG_LEVEL_ISR
)
1246 printk("mgslpc_isr(%d) entry.\n", irq
);
1250 if (!(info
->p_dev
->_locked
))
1253 spin_lock(&info
->lock
);
1255 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1256 if (debug_level
>= DEBUG_LEVEL_ISR
)
1257 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1259 if ((gis
& 0x70) || count
> 1000) {
1260 printk("synclink_cs:hardware failed or ejected\n");
1265 if (gis
& (BIT1
+ BIT0
)) {
1266 isr
= read_reg16(info
, CHB
+ ISR
);
1272 if (gis
& (BIT3
+ BIT2
))
1274 isr
= read_reg16(info
, CHA
+ ISR
);
1275 if (isr
& IRQ_TIMER
) {
1276 info
->irq_occurred
= 1;
1277 irq_disable(info
, CHA
, IRQ_TIMER
);
1281 if (isr
& IRQ_EXITHUNT
) {
1282 info
->icount
.exithunt
++;
1283 wake_up_interruptible(&info
->event_wait_q
);
1285 if (isr
& IRQ_BREAK_ON
) {
1287 if (info
->flags
& ASYNC_SAK
)
1290 if (isr
& IRQ_RXTIME
) {
1291 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1293 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1294 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1295 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1297 rx_ready_async(info
, isr
& IRQ_RXEOM
);
1301 if (isr
& IRQ_UNDERRUN
) {
1302 if (info
->tx_aborting
)
1303 info
->icount
.txabort
++;
1305 info
->icount
.txunder
++;
1308 else if (isr
& IRQ_ALLSENT
) {
1309 info
->icount
.txok
++;
1312 else if (isr
& IRQ_TXFIFO
)
1316 pis
= read_reg(info
, CHA
+ PIS
);
1324 /* Request bottom half processing if there's something
1325 * for it to do and the bh is not already running
1328 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1329 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1330 printk("%s(%d):%s queueing bh task.\n",
1331 __FILE__
,__LINE__
,info
->device_name
);
1332 schedule_work(&info
->task
);
1333 info
->bh_requested
= 1;
1336 spin_unlock(&info
->lock
);
1338 if (debug_level
>= DEBUG_LEVEL_ISR
)
1339 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1340 __FILE__
,__LINE__
,irq
);
1345 /* Initialize and start device.
1347 static int startup(MGSLPC_INFO
* info
)
1351 if (debug_level
>= DEBUG_LEVEL_INFO
)
1352 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1354 if (info
->flags
& ASYNC_INITIALIZED
)
1357 if (!info
->tx_buf
) {
1358 /* allocate a page of memory for a transmit buffer */
1359 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1360 if (!info
->tx_buf
) {
1361 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1362 __FILE__
,__LINE__
,info
->device_name
);
1367 info
->pending_bh
= 0;
1369 memset(&info
->icount
, 0, sizeof(info
->icount
));
1371 init_timer(&info
->tx_timer
);
1372 info
->tx_timer
.data
= (unsigned long)info
;
1373 info
->tx_timer
.function
= tx_timeout
;
1375 /* Allocate and claim adapter resources */
1376 retval
= claim_resources(info
);
1378 /* perform existance check and diagnostics */
1380 retval
= adapter_test(info
);
1383 if (capable(CAP_SYS_ADMIN
) && info
->tty
)
1384 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1385 release_resources(info
);
1389 /* program hardware for current parameters */
1390 mgslpc_change_params(info
);
1393 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1395 info
->flags
|= ASYNC_INITIALIZED
;
1400 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1402 static void shutdown(MGSLPC_INFO
* info
)
1404 unsigned long flags
;
1406 if (!(info
->flags
& ASYNC_INITIALIZED
))
1409 if (debug_level
>= DEBUG_LEVEL_INFO
)
1410 printk("%s(%d):mgslpc_shutdown(%s)\n",
1411 __FILE__
,__LINE__
, info
->device_name
);
1413 /* clear status wait queue because status changes */
1414 /* can't happen after shutting down the hardware */
1415 wake_up_interruptible(&info
->status_event_wait_q
);
1416 wake_up_interruptible(&info
->event_wait_q
);
1418 del_timer(&info
->tx_timer
);
1421 free_page((unsigned long) info
->tx_buf
);
1422 info
->tx_buf
= NULL
;
1425 spin_lock_irqsave(&info
->lock
,flags
);
1430 /* TODO:disable interrupts instead of reset to preserve signal states */
1433 if (!info
->tty
|| info
->tty
->termios
->c_cflag
& HUPCL
) {
1434 info
->serial_signals
&= ~(SerialSignal_DTR
+ SerialSignal_RTS
);
1438 spin_unlock_irqrestore(&info
->lock
,flags
);
1440 release_resources(info
);
1443 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1445 info
->flags
&= ~ASYNC_INITIALIZED
;
1448 static void mgslpc_program_hw(MGSLPC_INFO
*info
)
1450 unsigned long flags
;
1452 spin_lock_irqsave(&info
->lock
,flags
);
1456 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1458 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1465 info
->dcd_chkcount
= 0;
1466 info
->cts_chkcount
= 0;
1467 info
->ri_chkcount
= 0;
1468 info
->dsr_chkcount
= 0;
1470 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1471 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1474 if (info
->netcount
|| info
->tty
->termios
->c_cflag
& CREAD
)
1477 spin_unlock_irqrestore(&info
->lock
,flags
);
1480 /* Reconfigure adapter based on new parameters
1482 static void mgslpc_change_params(MGSLPC_INFO
*info
)
1487 if (!info
->tty
|| !info
->tty
->termios
)
1490 if (debug_level
>= DEBUG_LEVEL_INFO
)
1491 printk("%s(%d):mgslpc_change_params(%s)\n",
1492 __FILE__
,__LINE__
, info
->device_name
);
1494 cflag
= info
->tty
->termios
->c_cflag
;
1496 /* if B0 rate (hangup) specified then negate DTR and RTS */
1497 /* otherwise assert DTR and RTS */
1499 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
1501 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
1503 /* byte size and parity */
1505 switch (cflag
& CSIZE
) {
1506 case CS5
: info
->params
.data_bits
= 5; break;
1507 case CS6
: info
->params
.data_bits
= 6; break;
1508 case CS7
: info
->params
.data_bits
= 7; break;
1509 case CS8
: info
->params
.data_bits
= 8; break;
1510 default: info
->params
.data_bits
= 7; break;
1514 info
->params
.stop_bits
= 2;
1516 info
->params
.stop_bits
= 1;
1518 info
->params
.parity
= ASYNC_PARITY_NONE
;
1519 if (cflag
& PARENB
) {
1521 info
->params
.parity
= ASYNC_PARITY_ODD
;
1523 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1526 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1530 /* calculate number of jiffies to transmit a full
1531 * FIFO (32 bytes) at specified data rate
1533 bits_per_char
= info
->params
.data_bits
+
1534 info
->params
.stop_bits
+ 1;
1536 /* if port data rate is set to 460800 or less then
1537 * allow tty settings to override, otherwise keep the
1538 * current data rate.
1540 if (info
->params
.data_rate
<= 460800) {
1541 info
->params
.data_rate
= tty_get_baud_rate(info
->tty
);
1544 if ( info
->params
.data_rate
) {
1545 info
->timeout
= (32*HZ
*bits_per_char
) /
1546 info
->params
.data_rate
;
1548 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1550 if (cflag
& CRTSCTS
)
1551 info
->flags
|= ASYNC_CTS_FLOW
;
1553 info
->flags
&= ~ASYNC_CTS_FLOW
;
1556 info
->flags
&= ~ASYNC_CHECK_CD
;
1558 info
->flags
|= ASYNC_CHECK_CD
;
1560 /* process tty input control flags */
1562 info
->read_status_mask
= 0;
1563 if (I_INPCK(info
->tty
))
1564 info
->read_status_mask
|= BIT7
| BIT6
;
1565 if (I_IGNPAR(info
->tty
))
1566 info
->ignore_status_mask
|= BIT7
| BIT6
;
1568 mgslpc_program_hw(info
);
1571 /* Add a character to the transmit buffer
1573 static void mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1575 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1576 unsigned long flags
;
1578 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1579 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1580 __FILE__
,__LINE__
,ch
,info
->device_name
);
1583 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1589 spin_lock_irqsave(&info
->lock
,flags
);
1591 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1592 if (info
->tx_count
< TXBUFSIZE
- 1) {
1593 info
->tx_buf
[info
->tx_put
++] = ch
;
1594 info
->tx_put
&= TXBUFSIZE
-1;
1599 spin_unlock_irqrestore(&info
->lock
,flags
);
1602 /* Enable transmitter so remaining characters in the
1603 * transmit buffer are sent.
1605 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1607 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1608 unsigned long flags
;
1610 if (debug_level
>= DEBUG_LEVEL_INFO
)
1611 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1612 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1614 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1617 if (info
->tx_count
<= 0 || tty
->stopped
||
1618 tty
->hw_stopped
|| !info
->tx_buf
)
1621 if (debug_level
>= DEBUG_LEVEL_INFO
)
1622 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1623 __FILE__
,__LINE__
,info
->device_name
);
1625 spin_lock_irqsave(&info
->lock
,flags
);
1626 if (!info
->tx_active
)
1628 spin_unlock_irqrestore(&info
->lock
,flags
);
1631 /* Send a block of data
1635 * tty pointer to tty information structure
1636 * buf pointer to buffer containing send data
1637 * count size of send data in bytes
1639 * Returns: number of characters written
1641 static int mgslpc_write(struct tty_struct
* tty
,
1642 const unsigned char *buf
, int count
)
1645 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1646 unsigned long flags
;
1648 if (debug_level
>= DEBUG_LEVEL_INFO
)
1649 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1650 __FILE__
,__LINE__
,info
->device_name
,count
);
1652 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1656 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1657 if (count
> TXBUFSIZE
) {
1661 if (info
->tx_active
)
1663 else if (info
->tx_count
)
1669 min(TXBUFSIZE
- info
->tx_count
- 1,
1670 TXBUFSIZE
- info
->tx_put
));
1674 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1676 spin_lock_irqsave(&info
->lock
,flags
);
1677 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1678 info
->tx_count
+= c
;
1679 spin_unlock_irqrestore(&info
->lock
,flags
);
1686 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
1687 spin_lock_irqsave(&info
->lock
,flags
);
1688 if (!info
->tx_active
)
1690 spin_unlock_irqrestore(&info
->lock
,flags
);
1693 if (debug_level
>= DEBUG_LEVEL_INFO
)
1694 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1695 __FILE__
,__LINE__
,info
->device_name
,ret
);
1699 /* Return the count of free bytes in transmit buffer
1701 static int mgslpc_write_room(struct tty_struct
*tty
)
1703 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1706 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1709 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1710 /* HDLC (frame oriented) mode */
1711 if (info
->tx_active
)
1714 return HDLC_MAX_FRAME_SIZE
;
1716 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1721 if (debug_level
>= DEBUG_LEVEL_INFO
)
1722 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1723 __FILE__
,__LINE__
, info
->device_name
, ret
);
1727 /* Return the count of bytes in transmit buffer
1729 static int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1731 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1734 if (debug_level
>= DEBUG_LEVEL_INFO
)
1735 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1736 __FILE__
,__LINE__
, info
->device_name
);
1738 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1741 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1742 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1744 rc
= info
->tx_count
;
1746 if (debug_level
>= DEBUG_LEVEL_INFO
)
1747 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1748 __FILE__
,__LINE__
, info
->device_name
, rc
);
1753 /* Discard all data in the send buffer
1755 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1757 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1758 unsigned long flags
;
1760 if (debug_level
>= DEBUG_LEVEL_INFO
)
1761 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1762 __FILE__
,__LINE__
, info
->device_name
);
1764 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1767 spin_lock_irqsave(&info
->lock
,flags
);
1768 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1769 del_timer(&info
->tx_timer
);
1770 spin_unlock_irqrestore(&info
->lock
,flags
);
1772 wake_up_interruptible(&tty
->write_wait
);
1776 /* Send a high-priority XON/XOFF character
1778 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1780 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1781 unsigned long flags
;
1783 if (debug_level
>= DEBUG_LEVEL_INFO
)
1784 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1785 __FILE__
,__LINE__
, info
->device_name
, ch
);
1787 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1792 spin_lock_irqsave(&info
->lock
,flags
);
1793 if (!info
->tx_enabled
)
1795 spin_unlock_irqrestore(&info
->lock
,flags
);
1799 /* Signal remote device to throttle send data (our receive data)
1801 static void mgslpc_throttle(struct tty_struct
* tty
)
1803 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1804 unsigned long flags
;
1806 if (debug_level
>= DEBUG_LEVEL_INFO
)
1807 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1808 __FILE__
,__LINE__
, info
->device_name
);
1810 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1814 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1816 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1817 spin_lock_irqsave(&info
->lock
,flags
);
1818 info
->serial_signals
&= ~SerialSignal_RTS
;
1820 spin_unlock_irqrestore(&info
->lock
,flags
);
1824 /* Signal remote device to stop throttling send data (our receive data)
1826 static void mgslpc_unthrottle(struct tty_struct
* tty
)
1828 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1829 unsigned long flags
;
1831 if (debug_level
>= DEBUG_LEVEL_INFO
)
1832 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1833 __FILE__
,__LINE__
, info
->device_name
);
1835 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1842 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1845 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1846 spin_lock_irqsave(&info
->lock
,flags
);
1847 info
->serial_signals
|= SerialSignal_RTS
;
1849 spin_unlock_irqrestore(&info
->lock
,flags
);
1853 /* get the current serial statistics
1855 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1858 if (debug_level
>= DEBUG_LEVEL_INFO
)
1859 printk("get_params(%s)\n", info
->device_name
);
1861 memset(&info
->icount
, 0, sizeof(info
->icount
));
1863 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1870 /* get the current serial parameters
1872 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1875 if (debug_level
>= DEBUG_LEVEL_INFO
)
1876 printk("get_params(%s)\n", info
->device_name
);
1877 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1883 /* set the serial parameters
1887 * info pointer to device instance data
1888 * new_params user buffer containing new serial params
1890 * Returns: 0 if success, otherwise error code
1892 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
)
1894 unsigned long flags
;
1895 MGSL_PARAMS tmp_params
;
1898 if (debug_level
>= DEBUG_LEVEL_INFO
)
1899 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1900 info
->device_name
);
1901 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1903 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1904 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1905 __FILE__
,__LINE__
,info
->device_name
);
1909 spin_lock_irqsave(&info
->lock
,flags
);
1910 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
1911 spin_unlock_irqrestore(&info
->lock
,flags
);
1913 mgslpc_change_params(info
);
1918 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
1921 if (debug_level
>= DEBUG_LEVEL_INFO
)
1922 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
1923 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
1929 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
1931 unsigned long flags
;
1932 if (debug_level
>= DEBUG_LEVEL_INFO
)
1933 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
1934 spin_lock_irqsave(&info
->lock
,flags
);
1935 info
->idle_mode
= idle_mode
;
1937 spin_unlock_irqrestore(&info
->lock
,flags
);
1941 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
1944 if (debug_level
>= DEBUG_LEVEL_INFO
)
1945 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
1946 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
1952 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
1954 unsigned long flags
;
1956 if (debug_level
>= DEBUG_LEVEL_INFO
)
1957 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
1958 spin_lock_irqsave(&info
->lock
,flags
);
1959 info
->if_mode
= if_mode
;
1961 val
= read_reg(info
, PVR
) & 0x0f;
1962 switch (info
->if_mode
)
1964 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
1965 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
1966 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
1968 write_reg(info
, PVR
, val
);
1970 spin_unlock_irqrestore(&info
->lock
,flags
);
1974 static int set_txenable(MGSLPC_INFO
* info
, int enable
)
1976 unsigned long flags
;
1978 if (debug_level
>= DEBUG_LEVEL_INFO
)
1979 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
1981 spin_lock_irqsave(&info
->lock
,flags
);
1983 if (!info
->tx_enabled
)
1986 if (info
->tx_enabled
)
1989 spin_unlock_irqrestore(&info
->lock
,flags
);
1993 static int tx_abort(MGSLPC_INFO
* info
)
1995 unsigned long flags
;
1997 if (debug_level
>= DEBUG_LEVEL_INFO
)
1998 printk("tx_abort(%s)\n", info
->device_name
);
2000 spin_lock_irqsave(&info
->lock
,flags
);
2001 if (info
->tx_active
&& info
->tx_count
&&
2002 info
->params
.mode
== MGSL_MODE_HDLC
) {
2003 /* clear data count so FIFO is not filled on next IRQ.
2004 * This results in underrun and abort transmission.
2006 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
2007 info
->tx_aborting
= TRUE
;
2009 spin_unlock_irqrestore(&info
->lock
,flags
);
2013 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
2015 unsigned long flags
;
2017 if (debug_level
>= DEBUG_LEVEL_INFO
)
2018 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
2020 spin_lock_irqsave(&info
->lock
,flags
);
2022 if (!info
->rx_enabled
)
2025 if (info
->rx_enabled
)
2028 spin_unlock_irqrestore(&info
->lock
,flags
);
2032 /* wait for specified event to occur
2034 * Arguments: info pointer to device instance data
2035 * mask pointer to bitmask of events to wait for
2036 * Return Value: 0 if successful and bit mask updated with
2037 * of events triggerred,
2038 * otherwise error code
2040 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
2042 unsigned long flags
;
2045 struct mgsl_icount cprev
, cnow
;
2048 struct _input_signal_events oldsigs
, newsigs
;
2049 DECLARE_WAITQUEUE(wait
, current
);
2051 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
2055 if (debug_level
>= DEBUG_LEVEL_INFO
)
2056 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
2058 spin_lock_irqsave(&info
->lock
,flags
);
2060 /* return immediately if state matches requested events */
2062 s
= info
->serial_signals
;
2064 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
2065 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
2066 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
2067 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
2069 spin_unlock_irqrestore(&info
->lock
,flags
);
2073 /* save current irq counts */
2074 cprev
= info
->icount
;
2075 oldsigs
= info
->input_signal_events
;
2077 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
2078 (mask
& MgslEvent_ExitHuntMode
))
2079 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
2081 set_current_state(TASK_INTERRUPTIBLE
);
2082 add_wait_queue(&info
->event_wait_q
, &wait
);
2084 spin_unlock_irqrestore(&info
->lock
,flags
);
2089 if (signal_pending(current
)) {
2094 /* get current irq counts */
2095 spin_lock_irqsave(&info
->lock
,flags
);
2096 cnow
= info
->icount
;
2097 newsigs
= info
->input_signal_events
;
2098 set_current_state(TASK_INTERRUPTIBLE
);
2099 spin_unlock_irqrestore(&info
->lock
,flags
);
2101 /* if no change, wait aborted for some reason */
2102 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2103 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2104 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2105 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2106 newsigs
.cts_up
== oldsigs
.cts_up
&&
2107 newsigs
.cts_down
== oldsigs
.cts_down
&&
2108 newsigs
.ri_up
== oldsigs
.ri_up
&&
2109 newsigs
.ri_down
== oldsigs
.ri_down
&&
2110 cnow
.exithunt
== cprev
.exithunt
&&
2111 cnow
.rxidle
== cprev
.rxidle
) {
2117 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2118 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2119 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2120 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2121 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2122 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2123 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2124 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2125 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2126 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2134 remove_wait_queue(&info
->event_wait_q
, &wait
);
2135 set_current_state(TASK_RUNNING
);
2137 if (mask
& MgslEvent_ExitHuntMode
) {
2138 spin_lock_irqsave(&info
->lock
,flags
);
2139 if (!waitqueue_active(&info
->event_wait_q
))
2140 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2141 spin_unlock_irqrestore(&info
->lock
,flags
);
2145 PUT_USER(rc
, events
, mask_ptr
);
2149 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2151 unsigned long flags
;
2153 struct mgsl_icount cprev
, cnow
;
2154 DECLARE_WAITQUEUE(wait
, current
);
2156 /* save current irq counts */
2157 spin_lock_irqsave(&info
->lock
,flags
);
2158 cprev
= info
->icount
;
2159 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2160 set_current_state(TASK_INTERRUPTIBLE
);
2161 spin_unlock_irqrestore(&info
->lock
,flags
);
2165 if (signal_pending(current
)) {
2170 /* get new irq counts */
2171 spin_lock_irqsave(&info
->lock
,flags
);
2172 cnow
= info
->icount
;
2173 set_current_state(TASK_INTERRUPTIBLE
);
2174 spin_unlock_irqrestore(&info
->lock
,flags
);
2176 /* if no change, wait aborted for some reason */
2177 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2178 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2183 /* check for change in caller specified modem input */
2184 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2185 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2186 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2187 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2194 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2195 set_current_state(TASK_RUNNING
);
2199 /* return the state of the serial control and status signals
2201 static int tiocmget(struct tty_struct
*tty
, struct file
*file
)
2203 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2204 unsigned int result
;
2205 unsigned long flags
;
2207 spin_lock_irqsave(&info
->lock
,flags
);
2209 spin_unlock_irqrestore(&info
->lock
,flags
);
2211 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2212 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2213 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2214 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2215 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2216 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2218 if (debug_level
>= DEBUG_LEVEL_INFO
)
2219 printk("%s(%d):%s tiocmget() value=%08X\n",
2220 __FILE__
,__LINE__
, info
->device_name
, result
);
2224 /* set modem control signals (DTR/RTS)
2226 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
2227 unsigned int set
, unsigned int clear
)
2229 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2230 unsigned long flags
;
2232 if (debug_level
>= DEBUG_LEVEL_INFO
)
2233 printk("%s(%d):%s tiocmset(%x,%x)\n",
2234 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
2236 if (set
& TIOCM_RTS
)
2237 info
->serial_signals
|= SerialSignal_RTS
;
2238 if (set
& TIOCM_DTR
)
2239 info
->serial_signals
|= SerialSignal_DTR
;
2240 if (clear
& TIOCM_RTS
)
2241 info
->serial_signals
&= ~SerialSignal_RTS
;
2242 if (clear
& TIOCM_DTR
)
2243 info
->serial_signals
&= ~SerialSignal_DTR
;
2245 spin_lock_irqsave(&info
->lock
,flags
);
2247 spin_unlock_irqrestore(&info
->lock
,flags
);
2252 /* Set or clear transmit break condition
2254 * Arguments: tty pointer to tty instance data
2255 * break_state -1=set break condition, 0=clear
2257 static void mgslpc_break(struct tty_struct
*tty
, int break_state
)
2259 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2260 unsigned long flags
;
2262 if (debug_level
>= DEBUG_LEVEL_INFO
)
2263 printk("%s(%d):mgslpc_break(%s,%d)\n",
2264 __FILE__
,__LINE__
, info
->device_name
, break_state
);
2266 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2269 spin_lock_irqsave(&info
->lock
,flags
);
2270 if (break_state
== -1)
2271 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2273 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2274 spin_unlock_irqrestore(&info
->lock
,flags
);
2277 /* Service an IOCTL request
2281 * tty pointer to tty instance data
2282 * file pointer to associated file object for device
2283 * cmd IOCTL command code
2284 * arg command argument/context
2286 * Return Value: 0 if success, otherwise error code
2288 static int mgslpc_ioctl(struct tty_struct
*tty
, struct file
* file
,
2289 unsigned int cmd
, unsigned long arg
)
2291 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2293 if (debug_level
>= DEBUG_LEVEL_INFO
)
2294 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2295 info
->device_name
, cmd
);
2297 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2300 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2301 (cmd
!= TIOCMIWAIT
) && (cmd
!= TIOCGICOUNT
)) {
2302 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2306 return ioctl_common(info
, cmd
, arg
);
2309 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
)
2312 struct mgsl_icount cnow
; /* kernel counter temps */
2313 struct serial_icounter_struct __user
*p_cuser
; /* user space */
2314 void __user
*argp
= (void __user
*)arg
;
2315 unsigned long flags
;
2318 case MGSL_IOCGPARAMS
:
2319 return get_params(info
, argp
);
2320 case MGSL_IOCSPARAMS
:
2321 return set_params(info
, argp
);
2322 case MGSL_IOCGTXIDLE
:
2323 return get_txidle(info
, argp
);
2324 case MGSL_IOCSTXIDLE
:
2325 return set_txidle(info
, (int)arg
);
2327 return get_interface(info
, argp
);
2329 return set_interface(info
,(int)arg
);
2330 case MGSL_IOCTXENABLE
:
2331 return set_txenable(info
,(int)arg
);
2332 case MGSL_IOCRXENABLE
:
2333 return set_rxenable(info
,(int)arg
);
2334 case MGSL_IOCTXABORT
:
2335 return tx_abort(info
);
2336 case MGSL_IOCGSTATS
:
2337 return get_stats(info
, argp
);
2338 case MGSL_IOCWAITEVENT
:
2339 return wait_events(info
, argp
);
2341 return modem_input_wait(info
,(int)arg
);
2343 spin_lock_irqsave(&info
->lock
,flags
);
2344 cnow
= info
->icount
;
2345 spin_unlock_irqrestore(&info
->lock
,flags
);
2347 PUT_USER(error
,cnow
.cts
, &p_cuser
->cts
);
2348 if (error
) return error
;
2349 PUT_USER(error
,cnow
.dsr
, &p_cuser
->dsr
);
2350 if (error
) return error
;
2351 PUT_USER(error
,cnow
.rng
, &p_cuser
->rng
);
2352 if (error
) return error
;
2353 PUT_USER(error
,cnow
.dcd
, &p_cuser
->dcd
);
2354 if (error
) return error
;
2355 PUT_USER(error
,cnow
.rx
, &p_cuser
->rx
);
2356 if (error
) return error
;
2357 PUT_USER(error
,cnow
.tx
, &p_cuser
->tx
);
2358 if (error
) return error
;
2359 PUT_USER(error
,cnow
.frame
, &p_cuser
->frame
);
2360 if (error
) return error
;
2361 PUT_USER(error
,cnow
.overrun
, &p_cuser
->overrun
);
2362 if (error
) return error
;
2363 PUT_USER(error
,cnow
.parity
, &p_cuser
->parity
);
2364 if (error
) return error
;
2365 PUT_USER(error
,cnow
.brk
, &p_cuser
->brk
);
2366 if (error
) return error
;
2367 PUT_USER(error
,cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
2368 if (error
) return error
;
2371 return -ENOIOCTLCMD
;
2376 /* Set new termios settings
2380 * tty pointer to tty structure
2381 * termios pointer to buffer to hold returned old termios
2383 static void mgslpc_set_termios(struct tty_struct
*tty
, struct termios
*old_termios
)
2385 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2386 unsigned long flags
;
2388 if (debug_level
>= DEBUG_LEVEL_INFO
)
2389 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2390 tty
->driver
->name
);
2392 /* just return if nothing has changed */
2393 if ((tty
->termios
->c_cflag
== old_termios
->c_cflag
)
2394 && (RELEVANT_IFLAG(tty
->termios
->c_iflag
)
2395 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2398 mgslpc_change_params(info
);
2400 /* Handle transition to B0 status */
2401 if (old_termios
->c_cflag
& CBAUD
&&
2402 !(tty
->termios
->c_cflag
& CBAUD
)) {
2403 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2404 spin_lock_irqsave(&info
->lock
,flags
);
2406 spin_unlock_irqrestore(&info
->lock
,flags
);
2409 /* Handle transition away from B0 status */
2410 if (!(old_termios
->c_cflag
& CBAUD
) &&
2411 tty
->termios
->c_cflag
& CBAUD
) {
2412 info
->serial_signals
|= SerialSignal_DTR
;
2413 if (!(tty
->termios
->c_cflag
& CRTSCTS
) ||
2414 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2415 info
->serial_signals
|= SerialSignal_RTS
;
2417 spin_lock_irqsave(&info
->lock
,flags
);
2419 spin_unlock_irqrestore(&info
->lock
,flags
);
2422 /* Handle turning off CRTSCTS */
2423 if (old_termios
->c_cflag
& CRTSCTS
&&
2424 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2425 tty
->hw_stopped
= 0;
2430 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2432 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2434 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2437 if (debug_level
>= DEBUG_LEVEL_INFO
)
2438 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2439 __FILE__
,__LINE__
, info
->device_name
, info
->count
);
2444 if (tty_hung_up_p(filp
))
2447 if ((tty
->count
== 1) && (info
->count
!= 1)) {
2449 * tty->count is 1 and the tty structure will be freed.
2450 * info->count should be one in this case.
2451 * if it's not, correct it so that the port is shutdown.
2453 printk("mgslpc_close: bad refcount; tty->count is 1, "
2454 "info->count is %d\n", info
->count
);
2460 /* if at least one open remaining, leave hardware active */
2464 info
->flags
|= ASYNC_CLOSING
;
2466 /* set tty->closing to notify line discipline to
2467 * only process XON/XOFF characters. Only the N_TTY
2468 * discipline appears to use this (ppp does not).
2472 /* wait for transmit data to clear all layers */
2474 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
) {
2475 if (debug_level
>= DEBUG_LEVEL_INFO
)
2476 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2477 __FILE__
,__LINE__
, info
->device_name
);
2478 tty_wait_until_sent(tty
, info
->closing_wait
);
2481 if (info
->flags
& ASYNC_INITIALIZED
)
2482 mgslpc_wait_until_sent(tty
, info
->timeout
);
2484 if (tty
->driver
->flush_buffer
)
2485 tty
->driver
->flush_buffer(tty
);
2487 ldisc_flush_buffer(tty
);
2494 if (info
->blocked_open
) {
2495 if (info
->close_delay
) {
2496 msleep_interruptible(jiffies_to_msecs(info
->close_delay
));
2498 wake_up_interruptible(&info
->open_wait
);
2501 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
|ASYNC_CLOSING
);
2503 wake_up_interruptible(&info
->close_wait
);
2506 if (debug_level
>= DEBUG_LEVEL_INFO
)
2507 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2508 tty
->driver
->name
, info
->count
);
2511 /* Wait until the transmitter is empty.
2513 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2515 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2516 unsigned long orig_jiffies
, char_time
;
2521 if (debug_level
>= DEBUG_LEVEL_INFO
)
2522 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2523 __FILE__
,__LINE__
, info
->device_name
);
2525 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2528 if (!(info
->flags
& ASYNC_INITIALIZED
))
2531 orig_jiffies
= jiffies
;
2533 /* Set check interval to 1/5 of estimated time to
2534 * send a character, and make it at least 1. The check
2535 * interval should also be less than the timeout.
2536 * Note: use tight timings here to satisfy the NIST-PCTS.
2539 if ( info
->params
.data_rate
) {
2540 char_time
= info
->timeout
/(32 * 5);
2547 char_time
= min_t(unsigned long, char_time
, timeout
);
2549 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2550 while (info
->tx_active
) {
2551 msleep_interruptible(jiffies_to_msecs(char_time
));
2552 if (signal_pending(current
))
2554 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2558 while ((info
->tx_count
|| info
->tx_active
) &&
2560 msleep_interruptible(jiffies_to_msecs(char_time
));
2561 if (signal_pending(current
))
2563 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2569 if (debug_level
>= DEBUG_LEVEL_INFO
)
2570 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2571 __FILE__
,__LINE__
, info
->device_name
);
2574 /* Called by tty_hangup() when a hangup is signaled.
2575 * This is the same as closing all open files for the port.
2577 static void mgslpc_hangup(struct tty_struct
*tty
)
2579 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2581 if (debug_level
>= DEBUG_LEVEL_INFO
)
2582 printk("%s(%d):mgslpc_hangup(%s)\n",
2583 __FILE__
,__LINE__
, info
->device_name
);
2585 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2588 mgslpc_flush_buffer(tty
);
2592 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2595 wake_up_interruptible(&info
->open_wait
);
2598 /* Block the current process until the specified port
2599 * is ready to be opened.
2601 static int block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
2604 DECLARE_WAITQUEUE(wait
, current
);
2606 int do_clocal
= 0, extra_count
= 0;
2607 unsigned long flags
;
2609 if (debug_level
>= DEBUG_LEVEL_INFO
)
2610 printk("%s(%d):block_til_ready on %s\n",
2611 __FILE__
,__LINE__
, tty
->driver
->name
);
2613 if (filp
->f_flags
& O_NONBLOCK
|| tty
->flags
& (1 << TTY_IO_ERROR
)){
2614 /* nonblock mode is set or port is not enabled */
2615 /* just verify that callout device is not active */
2616 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2620 if (tty
->termios
->c_cflag
& CLOCAL
)
2623 /* Wait for carrier detect and the line to become
2624 * free (i.e., not in use by the callout). While we are in
2625 * this loop, info->count is dropped by one, so that
2626 * mgslpc_close() knows when to free things. We restore it upon
2627 * exit, either normal or abnormal.
2631 add_wait_queue(&info
->open_wait
, &wait
);
2633 if (debug_level
>= DEBUG_LEVEL_INFO
)
2634 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2635 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2637 spin_lock_irqsave(&info
->lock
, flags
);
2638 if (!tty_hung_up_p(filp
)) {
2642 spin_unlock_irqrestore(&info
->lock
, flags
);
2643 info
->blocked_open
++;
2646 if ((tty
->termios
->c_cflag
& CBAUD
)) {
2647 spin_lock_irqsave(&info
->lock
,flags
);
2648 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2650 spin_unlock_irqrestore(&info
->lock
,flags
);
2653 set_current_state(TASK_INTERRUPTIBLE
);
2655 if (tty_hung_up_p(filp
) || !(info
->flags
& ASYNC_INITIALIZED
)){
2656 retval
= (info
->flags
& ASYNC_HUP_NOTIFY
) ?
2657 -EAGAIN
: -ERESTARTSYS
;
2661 spin_lock_irqsave(&info
->lock
,flags
);
2663 spin_unlock_irqrestore(&info
->lock
,flags
);
2665 if (!(info
->flags
& ASYNC_CLOSING
) &&
2666 (do_clocal
|| (info
->serial_signals
& SerialSignal_DCD
)) ) {
2670 if (signal_pending(current
)) {
2671 retval
= -ERESTARTSYS
;
2675 if (debug_level
>= DEBUG_LEVEL_INFO
)
2676 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2677 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2682 set_current_state(TASK_RUNNING
);
2683 remove_wait_queue(&info
->open_wait
, &wait
);
2687 info
->blocked_open
--;
2689 if (debug_level
>= DEBUG_LEVEL_INFO
)
2690 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2691 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2694 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2699 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2703 unsigned long flags
;
2705 /* verify range of specified line number */
2707 if ((line
< 0) || (line
>= mgslpc_device_count
)) {
2708 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2709 __FILE__
,__LINE__
,line
);
2713 /* find the info structure for the specified line */
2714 info
= mgslpc_device_list
;
2715 while(info
&& info
->line
!= line
)
2716 info
= info
->next_device
;
2717 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2720 tty
->driver_data
= info
;
2723 if (debug_level
>= DEBUG_LEVEL_INFO
)
2724 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2725 __FILE__
,__LINE__
,tty
->driver
->name
, info
->count
);
2727 /* If port is closing, signal caller to try again */
2728 if (tty_hung_up_p(filp
) || info
->flags
& ASYNC_CLOSING
){
2729 if (info
->flags
& ASYNC_CLOSING
)
2730 interruptible_sleep_on(&info
->close_wait
);
2731 retval
= ((info
->flags
& ASYNC_HUP_NOTIFY
) ?
2732 -EAGAIN
: -ERESTARTSYS
);
2736 info
->tty
->low_latency
= (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2738 spin_lock_irqsave(&info
->netlock
, flags
);
2739 if (info
->netcount
) {
2741 spin_unlock_irqrestore(&info
->netlock
, flags
);
2745 spin_unlock_irqrestore(&info
->netlock
, flags
);
2747 if (info
->count
== 1) {
2748 /* 1st open on this device, init hardware */
2749 retval
= startup(info
);
2754 retval
= block_til_ready(tty
, filp
, info
);
2756 if (debug_level
>= DEBUG_LEVEL_INFO
)
2757 printk("%s(%d):block_til_ready(%s) returned %d\n",
2758 __FILE__
,__LINE__
, info
->device_name
, retval
);
2762 if (debug_level
>= DEBUG_LEVEL_INFO
)
2763 printk("%s(%d):mgslpc_open(%s) success\n",
2764 __FILE__
,__LINE__
, info
->device_name
);
2769 if (tty
->count
== 1)
2770 info
->tty
= NULL
; /* tty layer will release tty struct */
2779 * /proc fs routines....
2782 static inline int line_info(char *buf
, MGSLPC_INFO
*info
)
2786 unsigned long flags
;
2788 ret
= sprintf(buf
, "%s:io:%04X irq:%d",
2789 info
->device_name
, info
->io_base
, info
->irq_level
);
2791 /* output current serial signal states */
2792 spin_lock_irqsave(&info
->lock
,flags
);
2794 spin_unlock_irqrestore(&info
->lock
,flags
);
2798 if (info
->serial_signals
& SerialSignal_RTS
)
2799 strcat(stat_buf
, "|RTS");
2800 if (info
->serial_signals
& SerialSignal_CTS
)
2801 strcat(stat_buf
, "|CTS");
2802 if (info
->serial_signals
& SerialSignal_DTR
)
2803 strcat(stat_buf
, "|DTR");
2804 if (info
->serial_signals
& SerialSignal_DSR
)
2805 strcat(stat_buf
, "|DSR");
2806 if (info
->serial_signals
& SerialSignal_DCD
)
2807 strcat(stat_buf
, "|CD");
2808 if (info
->serial_signals
& SerialSignal_RI
)
2809 strcat(stat_buf
, "|RI");
2811 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2812 ret
+= sprintf(buf
+ret
, " HDLC txok:%d rxok:%d",
2813 info
->icount
.txok
, info
->icount
.rxok
);
2814 if (info
->icount
.txunder
)
2815 ret
+= sprintf(buf
+ret
, " txunder:%d", info
->icount
.txunder
);
2816 if (info
->icount
.txabort
)
2817 ret
+= sprintf(buf
+ret
, " txabort:%d", info
->icount
.txabort
);
2818 if (info
->icount
.rxshort
)
2819 ret
+= sprintf(buf
+ret
, " rxshort:%d", info
->icount
.rxshort
);
2820 if (info
->icount
.rxlong
)
2821 ret
+= sprintf(buf
+ret
, " rxlong:%d", info
->icount
.rxlong
);
2822 if (info
->icount
.rxover
)
2823 ret
+= sprintf(buf
+ret
, " rxover:%d", info
->icount
.rxover
);
2824 if (info
->icount
.rxcrc
)
2825 ret
+= sprintf(buf
+ret
, " rxcrc:%d", info
->icount
.rxcrc
);
2827 ret
+= sprintf(buf
+ret
, " ASYNC tx:%d rx:%d",
2828 info
->icount
.tx
, info
->icount
.rx
);
2829 if (info
->icount
.frame
)
2830 ret
+= sprintf(buf
+ret
, " fe:%d", info
->icount
.frame
);
2831 if (info
->icount
.parity
)
2832 ret
+= sprintf(buf
+ret
, " pe:%d", info
->icount
.parity
);
2833 if (info
->icount
.brk
)
2834 ret
+= sprintf(buf
+ret
, " brk:%d", info
->icount
.brk
);
2835 if (info
->icount
.overrun
)
2836 ret
+= sprintf(buf
+ret
, " oe:%d", info
->icount
.overrun
);
2839 /* Append serial signal status to end */
2840 ret
+= sprintf(buf
+ret
, " %s\n", stat_buf
+1);
2842 ret
+= sprintf(buf
+ret
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2843 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2849 /* Called to print information about devices
2851 static int mgslpc_read_proc(char *page
, char **start
, off_t off
, int count
,
2852 int *eof
, void *data
)
2858 len
+= sprintf(page
, "synclink driver:%s\n", driver_version
);
2860 info
= mgslpc_device_list
;
2862 l
= line_info(page
+ len
, info
);
2864 if (len
+begin
> off
+count
)
2866 if (len
+begin
< off
) {
2870 info
= info
->next_device
;
2875 if (off
>= len
+begin
)
2877 *start
= page
+ (off
-begin
);
2878 return ((count
< begin
+len
-off
) ? count
: begin
+len
-off
);
2881 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2883 /* each buffer has header and data */
2884 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2886 /* calculate total allocation size for 8 buffers */
2887 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2889 /* limit total allocated memory */
2890 if (info
->rx_buf_total_size
> 0x10000)
2891 info
->rx_buf_total_size
= 0x10000;
2893 /* calculate number of buffers */
2894 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2896 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2897 if (info
->rx_buf
== NULL
)
2900 rx_reset_buffers(info
);
2904 static void rx_free_buffers(MGSLPC_INFO
*info
)
2906 kfree(info
->rx_buf
);
2907 info
->rx_buf
= NULL
;
2910 static int claim_resources(MGSLPC_INFO
*info
)
2912 if (rx_alloc_buffers(info
) < 0 ) {
2913 printk( "Cant allocate rx buffer %s\n", info
->device_name
);
2914 release_resources(info
);
2920 static void release_resources(MGSLPC_INFO
*info
)
2922 if (debug_level
>= DEBUG_LEVEL_INFO
)
2923 printk("release_resources(%s)\n", info
->device_name
);
2924 rx_free_buffers(info
);
2927 /* Add the specified device instance data structure to the
2928 * global linked list of devices and increment the device count.
2930 * Arguments: info pointer to device instance data
2932 static void mgslpc_add_device(MGSLPC_INFO
*info
)
2934 info
->next_device
= NULL
;
2935 info
->line
= mgslpc_device_count
;
2936 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2938 if (info
->line
< MAX_DEVICE_COUNT
) {
2939 if (maxframe
[info
->line
])
2940 info
->max_frame_size
= maxframe
[info
->line
];
2941 info
->dosyncppp
= dosyncppp
[info
->line
];
2944 mgslpc_device_count
++;
2946 if (!mgslpc_device_list
)
2947 mgslpc_device_list
= info
;
2949 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
2950 while( current_dev
->next_device
)
2951 current_dev
= current_dev
->next_device
;
2952 current_dev
->next_device
= info
;
2955 if (info
->max_frame_size
< 4096)
2956 info
->max_frame_size
= 4096;
2957 else if (info
->max_frame_size
> 65535)
2958 info
->max_frame_size
= 65535;
2960 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2961 info
->device_name
, info
->io_base
, info
->irq_level
);
2968 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2970 MGSLPC_INFO
*info
= mgslpc_device_list
;
2971 MGSLPC_INFO
*last
= NULL
;
2974 if (info
== remove_info
) {
2976 last
->next_device
= info
->next_device
;
2978 mgslpc_device_list
= info
->next_device
;
2982 release_resources(info
);
2984 mgslpc_device_count
--;
2988 info
= info
->next_device
;
2992 static struct pcmcia_device_id mgslpc_ids
[] = {
2993 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2996 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2998 static struct pcmcia_driver mgslpc_driver
= {
2999 .owner
= THIS_MODULE
,
3001 .name
= "synclink_cs",
3003 .probe
= mgslpc_probe
,
3004 .remove
= mgslpc_detach
,
3005 .id_table
= mgslpc_ids
,
3006 .suspend
= mgslpc_suspend
,
3007 .resume
= mgslpc_resume
,
3010 static const struct tty_operations mgslpc_ops
= {
3011 .open
= mgslpc_open
,
3012 .close
= mgslpc_close
,
3013 .write
= mgslpc_write
,
3014 .put_char
= mgslpc_put_char
,
3015 .flush_chars
= mgslpc_flush_chars
,
3016 .write_room
= mgslpc_write_room
,
3017 .chars_in_buffer
= mgslpc_chars_in_buffer
,
3018 .flush_buffer
= mgslpc_flush_buffer
,
3019 .ioctl
= mgslpc_ioctl
,
3020 .throttle
= mgslpc_throttle
,
3021 .unthrottle
= mgslpc_unthrottle
,
3022 .send_xchar
= mgslpc_send_xchar
,
3023 .break_ctl
= mgslpc_break
,
3024 .wait_until_sent
= mgslpc_wait_until_sent
,
3025 .read_proc
= mgslpc_read_proc
,
3026 .set_termios
= mgslpc_set_termios
,
3028 .start
= tx_release
,
3029 .hangup
= mgslpc_hangup
,
3030 .tiocmget
= tiocmget
,
3031 .tiocmset
= tiocmset
,
3034 static void synclink_cs_cleanup(void)
3038 printk("Unloading %s: version %s\n", driver_name
, driver_version
);
3040 while(mgslpc_device_list
)
3041 mgslpc_remove_device(mgslpc_device_list
);
3043 if (serial_driver
) {
3044 if ((rc
= tty_unregister_driver(serial_driver
)))
3045 printk("%s(%d) failed to unregister tty driver err=%d\n",
3046 __FILE__
,__LINE__
,rc
);
3047 put_tty_driver(serial_driver
);
3050 pcmcia_unregister_driver(&mgslpc_driver
);
3053 static int __init
synclink_cs_init(void)
3057 if (break_on_load
) {
3058 mgslpc_get_text_ptr();
3062 printk("%s %s\n", driver_name
, driver_version
);
3064 if ((rc
= pcmcia_register_driver(&mgslpc_driver
)) < 0)
3067 serial_driver
= alloc_tty_driver(MAX_DEVICE_COUNT
);
3068 if (!serial_driver
) {
3073 /* Initialize the tty_driver structure */
3075 serial_driver
->owner
= THIS_MODULE
;
3076 serial_driver
->driver_name
= "synclink_cs";
3077 serial_driver
->name
= "ttySLP";
3078 serial_driver
->major
= ttymajor
;
3079 serial_driver
->minor_start
= 64;
3080 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
3081 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
3082 serial_driver
->init_termios
= tty_std_termios
;
3083 serial_driver
->init_termios
.c_cflag
=
3084 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
3085 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
3086 tty_set_operations(serial_driver
, &mgslpc_ops
);
3088 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
3089 printk("%s(%d):Couldn't register serial driver\n",
3091 put_tty_driver(serial_driver
);
3092 serial_driver
= NULL
;
3096 printk("%s %s, tty major#%d\n",
3097 driver_name
, driver_version
,
3098 serial_driver
->major
);
3103 synclink_cs_cleanup();
3107 static void __exit
synclink_cs_exit(void)
3109 synclink_cs_cleanup();
3112 module_init(synclink_cs_init
);
3113 module_exit(synclink_cs_exit
);
3115 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
3120 /* note:standard BRG mode is broken in V3.2 chip
3121 * so enhanced mode is always used
3129 for (M
= 1; N
> 64 && M
< 16; M
++)
3135 * BGR[7..0] contained in BGR register
3136 * BGR[9..8] contained in CCR2[7..6]
3137 * divisor = (N+1)*2^M
3139 * Note: M *must* not be zero (causes asymetric duty cycle)
3141 write_reg(info
, (unsigned char) (channel
+ BGR
),
3142 (unsigned char) ((M
<< 6) + N
));
3143 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
3144 val
|= ((M
<< 4) & 0xc0);
3145 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
3149 /* Enabled the AUX clock output at the specified frequency.
3151 static void enable_auxclk(MGSLPC_INFO
*info
)
3157 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3158 * 05 ADM Address Mode, 0 = no addr recognition
3159 * 04 TMD Timer Mode, 0 = external
3160 * 03 RAC Receiver Active, 0 = inactive
3161 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3162 * 01 TRS Timer Resolution, 1=512
3163 * 00 TLP Test Loop, 0 = no loop
3169 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3170 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3172 write_reg(info
, CHB
+ MODE
, val
);
3176 * 07 PU Power Up, 1=active, 0=power down
3177 * 06 MCE Master Clock Enable, 1=enabled
3179 * 04..02 SC[2..0] Encoding
3180 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3184 write_reg(info
, CHB
+ CCR0
, 0xc0);
3188 * 07 SFLG Shared Flag, 0 = disable shared flags
3189 * 06 GALP Go Active On Loop, 0 = not used
3190 * 05 GLP Go On Loop, 0 = not used
3191 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3192 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3193 * 02..00 CM[2..0] Clock Mode
3197 write_reg(info
, CHB
+ CCR1
, 0x17);
3201 * 07..06 BGR[9..8] Baud rate bits 9..8
3202 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3203 * 04 SSEL Clock source select, 1=submode b
3204 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3205 * 02 RWX Read/Write Exchange 0=disabled
3206 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3207 * 00 DIV, data inversion 0=disabled, 1=enabled
3211 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3212 write_reg(info
, CHB
+ CCR2
, 0x38);
3214 write_reg(info
, CHB
+ CCR2
, 0x30);
3218 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3219 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3220 * 05 TST1 Test Pin, 0=normal operation
3221 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3222 * 03..02 Reserved, must be 0
3223 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3227 write_reg(info
, CHB
+ CCR4
, 0x50);
3229 /* if auxclk not enabled, set internal BRG so
3230 * CTS transitions can be detected (requires TxC)
3232 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3233 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
3235 mgslpc_set_rate(info
, CHB
, 921600);
3238 static void loopback_enable(MGSLPC_INFO
*info
)
3242 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3243 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
3244 write_reg(info
, CHA
+ CCR1
, val
);
3246 /* CCR2:04 SSEL Clock source select, 1=submode b */
3247 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3248 write_reg(info
, CHA
+ CCR2
, val
);
3250 /* set LinkSpeed if available, otherwise default to 2Mbps */
3251 if (info
->params
.clock_speed
)
3252 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3254 mgslpc_set_rate(info
, CHA
, 1843200);
3256 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3257 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3258 write_reg(info
, CHA
+ MODE
, val
);
3261 static void hdlc_mode(MGSLPC_INFO
*info
)
3264 unsigned char clkmode
, clksubmode
;
3266 /* disable all interrupts */
3267 irq_disable(info
, CHA
, 0xffff);
3268 irq_disable(info
, CHB
, 0xffff);
3269 port_irq_disable(info
, 0xff);
3271 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3272 clkmode
= clksubmode
= 0;
3273 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3274 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3275 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3277 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3278 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3279 /* clock mode 7b, rcv = BRG, xmt = BRG */
3282 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3283 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3284 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3288 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3291 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3292 /* clock mode 0b, rcv = RxC, xmt = BRG */
3298 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3299 * 05 ADM Address Mode, 0 = no addr recognition
3300 * 04 TMD Timer Mode, 0 = external
3301 * 03 RAC Receiver Active, 0 = inactive
3302 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3303 * 01 TRS Timer Resolution, 1=512
3304 * 00 TLP Test Loop, 0 = no loop
3309 if (info
->params
.loopback
)
3312 /* preserve RTS state */
3313 if (info
->serial_signals
& SerialSignal_RTS
)
3315 write_reg(info
, CHA
+ MODE
, val
);
3319 * 07 PU Power Up, 1=active, 0=power down
3320 * 06 MCE Master Clock Enable, 1=enabled
3322 * 04..02 SC[2..0] Encoding
3323 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3328 switch (info
->params
.encoding
)
3330 case HDLC_ENCODING_NRZI
:
3333 case HDLC_ENCODING_BIPHASE_SPACE
:
3336 case HDLC_ENCODING_BIPHASE_MARK
:
3339 case HDLC_ENCODING_BIPHASE_LEVEL
:
3341 break; // Manchester
3343 write_reg(info
, CHA
+ CCR0
, val
);
3347 * 07 SFLG Shared Flag, 0 = disable shared flags
3348 * 06 GALP Go Active On Loop, 0 = not used
3349 * 05 GLP Go On Loop, 0 = not used
3350 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3351 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3352 * 02..00 CM[2..0] Clock Mode
3356 val
= 0x10 + clkmode
;
3357 write_reg(info
, CHA
+ CCR1
, val
);
3361 * 07..06 BGR[9..8] Baud rate bits 9..8
3362 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3363 * 04 SSEL Clock source select, 1=submode b
3364 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3365 * 02 RWX Read/Write Exchange 0=disabled
3366 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3367 * 00 DIV, data inversion 0=disabled, 1=enabled
3372 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3373 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3377 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3379 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3381 write_reg(info
, CHA
+ CCR2
, val
);
3385 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3386 * 05 EPT Enable preamble transmission, 1=enabled
3387 * 04 RADD Receive address pushed to FIFO, 0=disabled
3388 * 03 CRL CRC Reset Level, 0=FFFF
3389 * 02 RCRC Rx CRC 0=On 1=Off
3390 * 01 TCRC Tx CRC 0=On 1=Off
3391 * 00 PSD DPLL Phase Shift Disable
3396 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3398 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3400 switch (info
->params
.preamble_length
)
3402 case HDLC_PREAMBLE_LENGTH_16BITS
:
3405 case HDLC_PREAMBLE_LENGTH_32BITS
:
3408 case HDLC_PREAMBLE_LENGTH_64BITS
:
3412 write_reg(info
, CHA
+ CCR3
, val
);
3414 /* PRE - Preamble pattern */
3416 switch (info
->params
.preamble
)
3418 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3419 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3420 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3421 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3423 write_reg(info
, CHA
+ PRE
, val
);
3427 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3428 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3429 * 05 TST1 Test Pin, 0=normal operation
3430 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3431 * 03..02 Reserved, must be 0
3432 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3437 write_reg(info
, CHA
+ CCR4
, val
);
3438 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3439 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3441 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3443 /* RLCR Receive length check register
3445 * 7 1=enable receive length check
3446 * 6..0 Max frame length = (RL + 1) * 32
3448 write_reg(info
, CHA
+ RLCR
, 0);
3450 /* XBCH Transmit Byte Count High
3452 * 07 DMA mode, 0 = interrupt driven
3453 * 06 NRM, 0=ABM (ignored)
3454 * 05 CAS Carrier Auto Start
3455 * 04 XC Transmit Continuously (ignored)
3456 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3461 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3463 write_reg(info
, CHA
+ XBCH
, val
);
3464 enable_auxclk(info
);
3465 if (info
->params
.loopback
|| info
->testing_irq
)
3466 loopback_enable(info
);
3467 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3469 irq_enable(info
, CHB
, IRQ_CTS
);
3470 /* PVR[3] 1=AUTO CTS active */
3471 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3473 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3475 irq_enable(info
, CHA
,
3476 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3477 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3478 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3479 wait_command_complete(info
, CHA
);
3480 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3482 /* Master clock mode enabled above to allow reset commands
3483 * to complete even if no data clocks are present.
3485 * Disable master clock mode for normal communications because
3486 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3487 * IRQ when in master clock mode.
3489 * Leave master clock mode enabled for IRQ test because the
3490 * timer IRQ used by the test can only happen in master clock mode.
3492 if (!info
->testing_irq
)
3493 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3501 static void rx_stop(MGSLPC_INFO
*info
)
3503 if (debug_level
>= DEBUG_LEVEL_ISR
)
3504 printk("%s(%d):rx_stop(%s)\n",
3505 __FILE__
,__LINE__
, info
->device_name
);
3507 /* MODE:03 RAC Receiver Active, 0=inactive */
3508 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3510 info
->rx_enabled
= 0;
3511 info
->rx_overflow
= 0;
3514 static void rx_start(MGSLPC_INFO
*info
)
3516 if (debug_level
>= DEBUG_LEVEL_ISR
)
3517 printk("%s(%d):rx_start(%s)\n",
3518 __FILE__
,__LINE__
, info
->device_name
);
3520 rx_reset_buffers(info
);
3521 info
->rx_enabled
= 0;
3522 info
->rx_overflow
= 0;
3524 /* MODE:03 RAC Receiver Active, 1=active */
3525 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3527 info
->rx_enabled
= 1;
3530 static void tx_start(MGSLPC_INFO
*info
)
3532 if (debug_level
>= DEBUG_LEVEL_ISR
)
3533 printk("%s(%d):tx_start(%s)\n",
3534 __FILE__
,__LINE__
, info
->device_name
);
3536 if (info
->tx_count
) {
3537 /* If auto RTS enabled and RTS is inactive, then assert */
3538 /* RTS and set a flag indicating that the driver should */
3539 /* negate RTS when the transmission completes. */
3540 info
->drop_rts_on_tx_done
= 0;
3542 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3544 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3545 info
->serial_signals
|= SerialSignal_RTS
;
3547 info
->drop_rts_on_tx_done
= 1;
3551 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3552 if (!info
->tx_active
) {
3553 info
->tx_active
= 1;
3557 info
->tx_active
= 1;
3559 info
->tx_timer
.expires
= jiffies
+ msecs_to_jiffies(5000);
3560 add_timer(&info
->tx_timer
);
3564 if (!info
->tx_enabled
)
3565 info
->tx_enabled
= 1;
3568 static void tx_stop(MGSLPC_INFO
*info
)
3570 if (debug_level
>= DEBUG_LEVEL_ISR
)
3571 printk("%s(%d):tx_stop(%s)\n",
3572 __FILE__
,__LINE__
, info
->device_name
);
3574 del_timer(&info
->tx_timer
);
3576 info
->tx_enabled
= 0;
3577 info
->tx_active
= 0;
3580 /* Reset the adapter to a known state and prepare it for further use.
3582 static void reset_device(MGSLPC_INFO
*info
)
3584 /* power up both channels (set BIT7) */
3585 write_reg(info
, CHA
+ CCR0
, 0x80);
3586 write_reg(info
, CHB
+ CCR0
, 0x80);
3587 write_reg(info
, CHA
+ MODE
, 0);
3588 write_reg(info
, CHB
+ MODE
, 0);
3590 /* disable all interrupts */
3591 irq_disable(info
, CHA
, 0xffff);
3592 irq_disable(info
, CHB
, 0xffff);
3593 port_irq_disable(info
, 0xff);
3595 /* PCR Port Configuration Register
3597 * 07..04 DEC[3..0] Serial I/F select outputs
3598 * 03 output, 1=AUTO CTS control enabled
3599 * 02 RI Ring Indicator input 0=active
3600 * 01 DSR input 0=active
3601 * 00 DTR output 0=active
3605 write_reg(info
, PCR
, 0x06);
3607 /* PVR Port Value Register
3609 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3610 * 03 AUTO CTS output 1=enabled
3611 * 02 RI Ring Indicator input
3613 * 00 DTR output (1=inactive)
3617 // write_reg(info, PVR, PVR_DTR);
3619 /* IPC Interrupt Port Configuration
3621 * 07 VIS 1=Masked interrupts visible
3622 * 06..05 Reserved, 0
3623 * 04..03 SLA Slave address, 00 ignored
3624 * 02 CASM Cascading Mode, 1=daisy chain
3625 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3629 write_reg(info
, IPC
, 0x05);
3632 static void async_mode(MGSLPC_INFO
*info
)
3636 /* disable all interrupts */
3637 irq_disable(info
, CHA
, 0xffff);
3638 irq_disable(info
, CHB
, 0xffff);
3639 port_irq_disable(info
, 0xff);
3644 * 06 FRTS RTS State, 0=active
3645 * 05 FCTS Flow Control on CTS
3646 * 04 FLON Flow Control Enable
3647 * 03 RAC Receiver Active, 0 = inactive
3648 * 02 RTS 0=Auto RTS, 1=manual RTS
3649 * 01 TRS Timer Resolution, 1=512
3650 * 00 TLP Test Loop, 0 = no loop
3655 if (info
->params
.loopback
)
3658 /* preserve RTS state */
3659 if (!(info
->serial_signals
& SerialSignal_RTS
))
3661 write_reg(info
, CHA
+ MODE
, val
);
3665 * 07 PU Power Up, 1=active, 0=power down
3666 * 06 MCE Master Clock Enable, 1=enabled
3668 * 04..02 SC[2..0] Encoding, 000=NRZ
3669 * 01..00 SM[1..0] Serial Mode, 11=Async
3673 write_reg(info
, CHA
+ CCR0
, 0x83);
3677 * 07..05 Reserved, 0
3678 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3679 * 03 BCR Bit Clock Rate, 1=16x
3680 * 02..00 CM[2..0] Clock Mode, 111=BRG
3684 write_reg(info
, CHA
+ CCR1
, 0x1f);
3688 * 07..06 BGR[9..8] Baud rate bits 9..8
3689 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3690 * 04 SSEL Clock source select, 1=submode b
3691 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3692 * 02 RWX Read/Write Exchange 0=disabled
3694 * 00 DIV, data inversion 0=disabled, 1=enabled
3698 write_reg(info
, CHA
+ CCR2
, 0x10);
3702 * 07..01 Reserved, 0
3703 * 00 PSD DPLL Phase Shift Disable
3707 write_reg(info
, CHA
+ CCR3
, 0);
3711 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3712 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3713 * 05 TST1 Test Pin, 0=normal operation
3714 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3715 * 03..00 Reserved, must be 0
3719 write_reg(info
, CHA
+ CCR4
, 0x50);
3720 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3725 * 06 XBRK transmit break, 0=normal operation
3726 * 05 Stop bits (0=1, 1=2)
3727 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3728 * 02 PAREN Parity Enable
3729 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3733 if (info
->params
.data_bits
!= 8)
3734 val
|= BIT0
; /* 7 bits */
3735 if (info
->params
.stop_bits
!= 1)
3737 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3739 val
|= BIT2
; /* Parity enable */
3740 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3745 write_reg(info
, CHA
+ DAFO
, val
);
3747 /* RFC Rx FIFO Control
3750 * 06 DPS, 1=parity bit not stored in data byte
3751 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3752 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3753 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3755 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3759 write_reg(info
, CHA
+ RFC
, 0x5c);
3761 /* RLCR Receive length check register
3763 * Max frame length = (RL + 1) * 32
3765 write_reg(info
, CHA
+ RLCR
, 0);
3767 /* XBCH Transmit Byte Count High
3769 * 07 DMA mode, 0 = interrupt driven
3770 * 06 NRM, 0=ABM (ignored)
3771 * 05 CAS Carrier Auto Start
3772 * 04 XC Transmit Continuously (ignored)
3773 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3778 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3780 write_reg(info
, CHA
+ XBCH
, val
);
3781 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3782 irq_enable(info
, CHA
, IRQ_CTS
);
3784 /* MODE:03 RAC Receiver Active, 1=active */
3785 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3786 enable_auxclk(info
);
3787 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3788 irq_enable(info
, CHB
, IRQ_CTS
);
3789 /* PVR[3] 1=AUTO CTS active */
3790 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3792 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3793 irq_enable(info
, CHA
,
3794 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3795 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3796 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3797 wait_command_complete(info
, CHA
);
3798 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3801 /* Set the HDLC idle mode for the transmitter.
3803 static void tx_set_idle(MGSLPC_INFO
*info
)
3805 /* Note: ESCC2 only supports flags and one idle modes */
3806 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3807 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3809 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3812 /* get state of the V24 status (input) signals.
3814 static void get_signals(MGSLPC_INFO
*info
)
3816 unsigned char status
= 0;
3818 /* preserve DTR and RTS */
3819 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3821 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3822 info
->serial_signals
|= SerialSignal_DCD
;
3823 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3824 info
->serial_signals
|= SerialSignal_CTS
;
3826 status
= read_reg(info
, CHA
+ PVR
);
3827 if (!(status
& PVR_RI
))
3828 info
->serial_signals
|= SerialSignal_RI
;
3829 if (!(status
& PVR_DSR
))
3830 info
->serial_signals
|= SerialSignal_DSR
;
3833 /* Set the state of DTR and RTS based on contents of
3834 * serial_signals member of device extension.
3836 static void set_signals(MGSLPC_INFO
*info
)
3840 val
= read_reg(info
, CHA
+ MODE
);
3841 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3842 if (info
->serial_signals
& SerialSignal_RTS
)
3847 if (info
->serial_signals
& SerialSignal_RTS
)
3852 write_reg(info
, CHA
+ MODE
, val
);
3854 if (info
->serial_signals
& SerialSignal_DTR
)
3855 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3857 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3860 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3867 info
->rx_frame_count
= 0;
3868 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3869 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3870 buf
->status
= buf
->count
= 0;
3874 /* Attempt to return a received HDLC frame
3875 * Only frames received without errors are returned.
3877 * Returns 1 if frame returned, otherwise 0
3879 static int rx_get_frame(MGSLPC_INFO
*info
)
3881 unsigned short status
;
3883 unsigned int framesize
= 0;
3884 unsigned long flags
;
3885 struct tty_struct
*tty
= info
->tty
;
3886 int return_frame
= 0;
3888 if (info
->rx_frame_count
== 0)
3891 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3893 status
= buf
->status
;
3895 /* 07 VFR 1=valid frame
3896 * 06 RDO 1=data overrun
3897 * 05 CRC 1=OK, 0=error
3898 * 04 RAB 1=frame aborted
3900 if ((status
& 0xf0) != 0xA0) {
3901 if (!(status
& BIT7
) || (status
& BIT4
))
3902 info
->icount
.rxabort
++;
3903 else if (status
& BIT6
)
3904 info
->icount
.rxover
++;
3905 else if (!(status
& BIT5
)) {
3906 info
->icount
.rxcrc
++;
3907 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3913 struct net_device_stats
*stats
= hdlc_stats(info
->netdev
);
3915 stats
->rx_frame_errors
++;
3922 framesize
= buf
->count
;
3924 if (debug_level
>= DEBUG_LEVEL_BH
)
3925 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3926 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
3928 if (debug_level
>= DEBUG_LEVEL_DATA
)
3929 trace_block(info
, buf
->data
, framesize
, 0);
3932 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3933 framesize
+1 > info
->max_frame_size
) ||
3934 framesize
> info
->max_frame_size
)
3935 info
->icount
.rxlong
++;
3938 info
->icount
.rxok
++;
3940 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3941 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3947 hdlcdev_rx(info
, buf
->data
, framesize
);
3950 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3954 spin_lock_irqsave(&info
->lock
,flags
);
3955 buf
->status
= buf
->count
= 0;
3956 info
->rx_frame_count
--;
3958 if (info
->rx_get
>= info
->rx_buf_count
)
3960 spin_unlock_irqrestore(&info
->lock
,flags
);
3965 static BOOLEAN
register_test(MGSLPC_INFO
*info
)
3967 static unsigned char patterns
[] =
3968 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3969 static unsigned int count
= ARRAY_SIZE(patterns
);
3972 unsigned long flags
;
3974 spin_lock_irqsave(&info
->lock
,flags
);
3977 for (i
= 0; i
< count
; i
++) {
3978 write_reg(info
, XAD1
, patterns
[i
]);
3979 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3980 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3981 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3987 spin_unlock_irqrestore(&info
->lock
,flags
);
3991 static BOOLEAN
irq_test(MGSLPC_INFO
*info
)
3993 unsigned long end_time
;
3994 unsigned long flags
;
3996 spin_lock_irqsave(&info
->lock
,flags
);
3999 info
->testing_irq
= TRUE
;
4002 info
->irq_occurred
= FALSE
;
4004 /* init hdlc mode */
4006 irq_enable(info
, CHA
, IRQ_TIMER
);
4007 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
4008 issue_command(info
, CHA
, CMD_START_TIMER
);
4010 spin_unlock_irqrestore(&info
->lock
,flags
);
4013 while(end_time
-- && !info
->irq_occurred
) {
4014 msleep_interruptible(10);
4017 info
->testing_irq
= FALSE
;
4019 spin_lock_irqsave(&info
->lock
,flags
);
4021 spin_unlock_irqrestore(&info
->lock
,flags
);
4023 return info
->irq_occurred
? TRUE
: FALSE
;
4026 static int adapter_test(MGSLPC_INFO
*info
)
4028 if (!register_test(info
)) {
4029 info
->init_error
= DiagStatus_AddressFailure
;
4030 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4031 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
4035 if (!irq_test(info
)) {
4036 info
->init_error
= DiagStatus_IrqFailure
;
4037 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4038 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
4042 if (debug_level
>= DEBUG_LEVEL_INFO
)
4043 printk("%s(%d):device %s passed diagnostics\n",
4044 __FILE__
,__LINE__
,info
->device_name
);
4048 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
4053 printk("%s tx data:\n",info
->device_name
);
4055 printk("%s rx data:\n",info
->device_name
);
4063 for(i
=0;i
<linecount
;i
++)
4064 printk("%02X ",(unsigned char)data
[i
]);
4067 for(i
=0;i
<linecount
;i
++) {
4068 if (data
[i
]>=040 && data
[i
]<=0176)
4069 printk("%c",data
[i
]);
4080 /* HDLC frame time out
4081 * update stats and do tx completion processing
4083 static void tx_timeout(unsigned long context
)
4085 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
4086 unsigned long flags
;
4088 if ( debug_level
>= DEBUG_LEVEL_INFO
)
4089 printk( "%s(%d):tx_timeout(%s)\n",
4090 __FILE__
,__LINE__
,info
->device_name
);
4091 if(info
->tx_active
&&
4092 info
->params
.mode
== MGSL_MODE_HDLC
) {
4093 info
->icount
.txtimeout
++;
4095 spin_lock_irqsave(&info
->lock
,flags
);
4096 info
->tx_active
= 0;
4097 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
4099 spin_unlock_irqrestore(&info
->lock
,flags
);
4103 hdlcdev_tx_done(info
);
4112 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4113 * set encoding and frame check sequence (FCS) options
4115 * dev pointer to network device structure
4116 * encoding serial encoding setting
4117 * parity FCS setting
4119 * returns 0 if success, otherwise error code
4121 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
4122 unsigned short parity
)
4124 MGSLPC_INFO
*info
= dev_to_port(dev
);
4125 unsigned char new_encoding
;
4126 unsigned short new_crctype
;
4128 /* return error if TTY interface open */
4134 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
4135 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
4136 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
4137 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
4138 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
4139 default: return -EINVAL
;
4144 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
4145 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
4146 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
4147 default: return -EINVAL
;
4150 info
->params
.encoding
= new_encoding
;
4151 info
->params
.crc_type
= new_crctype
;
4153 /* if network interface up, reprogram hardware */
4155 mgslpc_program_hw(info
);
4161 * called by generic HDLC layer to send frame
4163 * skb socket buffer containing HDLC frame
4164 * dev pointer to network device structure
4166 * returns 0 if success, otherwise error code
4168 static int hdlcdev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4170 MGSLPC_INFO
*info
= dev_to_port(dev
);
4171 struct net_device_stats
*stats
= hdlc_stats(dev
);
4172 unsigned long flags
;
4174 if (debug_level
>= DEBUG_LEVEL_INFO
)
4175 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
4177 /* stop sending until this frame completes */
4178 netif_stop_queue(dev
);
4180 /* copy data to device buffers */
4181 memcpy(info
->tx_buf
, skb
->data
, skb
->len
);
4183 info
->tx_put
= info
->tx_count
= skb
->len
;
4185 /* update network statistics */
4186 stats
->tx_packets
++;
4187 stats
->tx_bytes
+= skb
->len
;
4189 /* done with socket buffer, so free it */
4192 /* save start time for transmit timeout detection */
4193 dev
->trans_start
= jiffies
;
4195 /* start hardware transmitter if necessary */
4196 spin_lock_irqsave(&info
->lock
,flags
);
4197 if (!info
->tx_active
)
4199 spin_unlock_irqrestore(&info
->lock
,flags
);
4205 * called by network layer when interface enabled
4206 * claim resources and initialize hardware
4208 * dev pointer to network device structure
4210 * returns 0 if success, otherwise error code
4212 static int hdlcdev_open(struct net_device
*dev
)
4214 MGSLPC_INFO
*info
= dev_to_port(dev
);
4216 unsigned long flags
;
4218 if (debug_level
>= DEBUG_LEVEL_INFO
)
4219 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
4221 /* generic HDLC layer open processing */
4222 if ((rc
= hdlc_open(dev
)))
4225 /* arbitrate between network and tty opens */
4226 spin_lock_irqsave(&info
->netlock
, flags
);
4227 if (info
->count
!= 0 || info
->netcount
!= 0) {
4228 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
4229 spin_unlock_irqrestore(&info
->netlock
, flags
);
4233 spin_unlock_irqrestore(&info
->netlock
, flags
);
4235 /* claim resources and init adapter */
4236 if ((rc
= startup(info
)) != 0) {
4237 spin_lock_irqsave(&info
->netlock
, flags
);
4239 spin_unlock_irqrestore(&info
->netlock
, flags
);
4243 /* assert DTR and RTS, apply hardware settings */
4244 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4245 mgslpc_program_hw(info
);
4247 /* enable network layer transmit */
4248 dev
->trans_start
= jiffies
;
4249 netif_start_queue(dev
);
4251 /* inform generic HDLC layer of current DCD status */
4252 spin_lock_irqsave(&info
->lock
, flags
);
4254 spin_unlock_irqrestore(&info
->lock
, flags
);
4255 if (info
->serial_signals
& SerialSignal_DCD
)
4256 netif_carrier_on(dev
);
4258 netif_carrier_off(dev
);
4263 * called by network layer when interface is disabled
4264 * shutdown hardware and release resources
4266 * dev pointer to network device structure
4268 * returns 0 if success, otherwise error code
4270 static int hdlcdev_close(struct net_device
*dev
)
4272 MGSLPC_INFO
*info
= dev_to_port(dev
);
4273 unsigned long flags
;
4275 if (debug_level
>= DEBUG_LEVEL_INFO
)
4276 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4278 netif_stop_queue(dev
);
4280 /* shutdown adapter and release resources */
4285 spin_lock_irqsave(&info
->netlock
, flags
);
4287 spin_unlock_irqrestore(&info
->netlock
, flags
);
4293 * called by network layer to process IOCTL call to network device
4295 * dev pointer to network device structure
4296 * ifr pointer to network interface request structure
4297 * cmd IOCTL command code
4299 * returns 0 if success, otherwise error code
4301 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4303 const size_t size
= sizeof(sync_serial_settings
);
4304 sync_serial_settings new_line
;
4305 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4306 MGSLPC_INFO
*info
= dev_to_port(dev
);
4309 if (debug_level
>= DEBUG_LEVEL_INFO
)
4310 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4312 /* return error if TTY interface open */
4316 if (cmd
!= SIOCWANDEV
)
4317 return hdlc_ioctl(dev
, ifr
, cmd
);
4319 switch(ifr
->ifr_settings
.type
) {
4320 case IF_GET_IFACE
: /* return current sync_serial_settings */
4322 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4323 if (ifr
->ifr_settings
.size
< size
) {
4324 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4328 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4329 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4330 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4331 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4334 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4335 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4336 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4337 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4338 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4341 new_line
.clock_rate
= info
->params
.clock_speed
;
4342 new_line
.loopback
= info
->params
.loopback
? 1:0;
4344 if (copy_to_user(line
, &new_line
, size
))
4348 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4350 if(!capable(CAP_NET_ADMIN
))
4352 if (copy_from_user(&new_line
, line
, size
))
4355 switch (new_line
.clock_type
)
4357 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4358 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4359 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4360 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4361 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4362 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4363 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4364 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4365 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4366 default: return -EINVAL
;
4369 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4372 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4373 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4374 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4375 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4376 info
->params
.flags
|= flags
;
4378 info
->params
.loopback
= new_line
.loopback
;
4380 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4381 info
->params
.clock_speed
= new_line
.clock_rate
;
4383 info
->params
.clock_speed
= 0;
4385 /* if network interface up, reprogram hardware */
4387 mgslpc_program_hw(info
);
4391 return hdlc_ioctl(dev
, ifr
, cmd
);
4396 * called by network layer when transmit timeout is detected
4398 * dev pointer to network device structure
4400 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4402 MGSLPC_INFO
*info
= dev_to_port(dev
);
4403 struct net_device_stats
*stats
= hdlc_stats(dev
);
4404 unsigned long flags
;
4406 if (debug_level
>= DEBUG_LEVEL_INFO
)
4407 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4410 stats
->tx_aborted_errors
++;
4412 spin_lock_irqsave(&info
->lock
,flags
);
4414 spin_unlock_irqrestore(&info
->lock
,flags
);
4416 netif_wake_queue(dev
);
4420 * called by device driver when transmit completes
4421 * reenable network layer transmit if stopped
4423 * info pointer to device instance information
4425 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4427 if (netif_queue_stopped(info
->netdev
))
4428 netif_wake_queue(info
->netdev
);
4432 * called by device driver when frame received
4433 * pass frame to network layer
4435 * info pointer to device instance information
4436 * buf pointer to buffer contianing frame data
4437 * size count of data bytes in buf
4439 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4441 struct sk_buff
*skb
= dev_alloc_skb(size
);
4442 struct net_device
*dev
= info
->netdev
;
4443 struct net_device_stats
*stats
= hdlc_stats(dev
);
4445 if (debug_level
>= DEBUG_LEVEL_INFO
)
4446 printk("hdlcdev_rx(%s)\n",dev
->name
);
4449 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4450 stats
->rx_dropped
++;
4454 memcpy(skb_put(skb
, size
),buf
,size
);
4456 skb
->protocol
= hdlc_type_trans(skb
, info
->netdev
);
4458 stats
->rx_packets
++;
4459 stats
->rx_bytes
+= size
;
4463 info
->netdev
->last_rx
= jiffies
;
4467 * called by device driver when adding device instance
4468 * do generic HDLC initialization
4470 * info pointer to device instance information
4472 * returns 0 if success, otherwise error code
4474 static int hdlcdev_init(MGSLPC_INFO
*info
)
4477 struct net_device
*dev
;
4480 /* allocate and initialize network and HDLC layer objects */
4482 if (!(dev
= alloc_hdlcdev(info
))) {
4483 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4487 /* for network layer reporting purposes only */
4488 dev
->base_addr
= info
->io_base
;
4489 dev
->irq
= info
->irq_level
;
4491 /* network layer callbacks and settings */
4492 dev
->do_ioctl
= hdlcdev_ioctl
;
4493 dev
->open
= hdlcdev_open
;
4494 dev
->stop
= hdlcdev_close
;
4495 dev
->tx_timeout
= hdlcdev_tx_timeout
;
4496 dev
->watchdog_timeo
= 10*HZ
;
4497 dev
->tx_queue_len
= 50;
4499 /* generic HDLC layer callbacks and settings */
4500 hdlc
= dev_to_hdlc(dev
);
4501 hdlc
->attach
= hdlcdev_attach
;
4502 hdlc
->xmit
= hdlcdev_xmit
;
4504 /* register objects with HDLC layer */
4505 if ((rc
= register_hdlc_device(dev
))) {
4506 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4516 * called by device driver when removing device instance
4517 * do generic HDLC cleanup
4519 * info pointer to device instance information
4521 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4523 unregister_hdlc_device(info
->netdev
);
4524 free_netdev(info
->netdev
);
4525 info
->netdev
= NULL
;
4528 #endif /* CONFIG_HDLC */