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
, struct pt_regs
* regs
);
422 * Bottom half interrupt handlers
424 static void bh_handler(void* Context
);
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
, info
);
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(void* Context
)
847 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)Context
;
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
1237 * regs interrupted processor context
1239 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
, struct pt_regs
* regs
)
1241 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)dev_id
;
1243 unsigned char gis
, pis
;
1246 if (debug_level
>= DEBUG_LEVEL_ISR
)
1247 printk("mgslpc_isr(%d) entry.\n", irq
);
1251 if (!(info
->p_dev
->_locked
))
1254 spin_lock(&info
->lock
);
1256 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1257 if (debug_level
>= DEBUG_LEVEL_ISR
)
1258 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1260 if ((gis
& 0x70) || count
> 1000) {
1261 printk("synclink_cs:hardware failed or ejected\n");
1266 if (gis
& (BIT1
+ BIT0
)) {
1267 isr
= read_reg16(info
, CHB
+ ISR
);
1273 if (gis
& (BIT3
+ BIT2
))
1275 isr
= read_reg16(info
, CHA
+ ISR
);
1276 if (isr
& IRQ_TIMER
) {
1277 info
->irq_occurred
= 1;
1278 irq_disable(info
, CHA
, IRQ_TIMER
);
1282 if (isr
& IRQ_EXITHUNT
) {
1283 info
->icount
.exithunt
++;
1284 wake_up_interruptible(&info
->event_wait_q
);
1286 if (isr
& IRQ_BREAK_ON
) {
1288 if (info
->flags
& ASYNC_SAK
)
1291 if (isr
& IRQ_RXTIME
) {
1292 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1294 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1295 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1296 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1298 rx_ready_async(info
, isr
& IRQ_RXEOM
);
1302 if (isr
& IRQ_UNDERRUN
) {
1303 if (info
->tx_aborting
)
1304 info
->icount
.txabort
++;
1306 info
->icount
.txunder
++;
1309 else if (isr
& IRQ_ALLSENT
) {
1310 info
->icount
.txok
++;
1313 else if (isr
& IRQ_TXFIFO
)
1317 pis
= read_reg(info
, CHA
+ PIS
);
1325 /* Request bottom half processing if there's something
1326 * for it to do and the bh is not already running
1329 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1330 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1331 printk("%s(%d):%s queueing bh task.\n",
1332 __FILE__
,__LINE__
,info
->device_name
);
1333 schedule_work(&info
->task
);
1334 info
->bh_requested
= 1;
1337 spin_unlock(&info
->lock
);
1339 if (debug_level
>= DEBUG_LEVEL_ISR
)
1340 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1341 __FILE__
,__LINE__
,irq
);
1346 /* Initialize and start device.
1348 static int startup(MGSLPC_INFO
* info
)
1352 if (debug_level
>= DEBUG_LEVEL_INFO
)
1353 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1355 if (info
->flags
& ASYNC_INITIALIZED
)
1358 if (!info
->tx_buf
) {
1359 /* allocate a page of memory for a transmit buffer */
1360 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1361 if (!info
->tx_buf
) {
1362 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1363 __FILE__
,__LINE__
,info
->device_name
);
1368 info
->pending_bh
= 0;
1370 memset(&info
->icount
, 0, sizeof(info
->icount
));
1372 init_timer(&info
->tx_timer
);
1373 info
->tx_timer
.data
= (unsigned long)info
;
1374 info
->tx_timer
.function
= tx_timeout
;
1376 /* Allocate and claim adapter resources */
1377 retval
= claim_resources(info
);
1379 /* perform existance check and diagnostics */
1381 retval
= adapter_test(info
);
1384 if (capable(CAP_SYS_ADMIN
) && info
->tty
)
1385 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1386 release_resources(info
);
1390 /* program hardware for current parameters */
1391 mgslpc_change_params(info
);
1394 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1396 info
->flags
|= ASYNC_INITIALIZED
;
1401 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1403 static void shutdown(MGSLPC_INFO
* info
)
1405 unsigned long flags
;
1407 if (!(info
->flags
& ASYNC_INITIALIZED
))
1410 if (debug_level
>= DEBUG_LEVEL_INFO
)
1411 printk("%s(%d):mgslpc_shutdown(%s)\n",
1412 __FILE__
,__LINE__
, info
->device_name
);
1414 /* clear status wait queue because status changes */
1415 /* can't happen after shutting down the hardware */
1416 wake_up_interruptible(&info
->status_event_wait_q
);
1417 wake_up_interruptible(&info
->event_wait_q
);
1419 del_timer(&info
->tx_timer
);
1422 free_page((unsigned long) info
->tx_buf
);
1423 info
->tx_buf
= NULL
;
1426 spin_lock_irqsave(&info
->lock
,flags
);
1431 /* TODO:disable interrupts instead of reset to preserve signal states */
1434 if (!info
->tty
|| info
->tty
->termios
->c_cflag
& HUPCL
) {
1435 info
->serial_signals
&= ~(SerialSignal_DTR
+ SerialSignal_RTS
);
1439 spin_unlock_irqrestore(&info
->lock
,flags
);
1441 release_resources(info
);
1444 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1446 info
->flags
&= ~ASYNC_INITIALIZED
;
1449 static void mgslpc_program_hw(MGSLPC_INFO
*info
)
1451 unsigned long flags
;
1453 spin_lock_irqsave(&info
->lock
,flags
);
1457 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1459 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1466 info
->dcd_chkcount
= 0;
1467 info
->cts_chkcount
= 0;
1468 info
->ri_chkcount
= 0;
1469 info
->dsr_chkcount
= 0;
1471 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1472 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1475 if (info
->netcount
|| info
->tty
->termios
->c_cflag
& CREAD
)
1478 spin_unlock_irqrestore(&info
->lock
,flags
);
1481 /* Reconfigure adapter based on new parameters
1483 static void mgslpc_change_params(MGSLPC_INFO
*info
)
1488 if (!info
->tty
|| !info
->tty
->termios
)
1491 if (debug_level
>= DEBUG_LEVEL_INFO
)
1492 printk("%s(%d):mgslpc_change_params(%s)\n",
1493 __FILE__
,__LINE__
, info
->device_name
);
1495 cflag
= info
->tty
->termios
->c_cflag
;
1497 /* if B0 rate (hangup) specified then negate DTR and RTS */
1498 /* otherwise assert DTR and RTS */
1500 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
1502 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
1504 /* byte size and parity */
1506 switch (cflag
& CSIZE
) {
1507 case CS5
: info
->params
.data_bits
= 5; break;
1508 case CS6
: info
->params
.data_bits
= 6; break;
1509 case CS7
: info
->params
.data_bits
= 7; break;
1510 case CS8
: info
->params
.data_bits
= 8; break;
1511 default: info
->params
.data_bits
= 7; break;
1515 info
->params
.stop_bits
= 2;
1517 info
->params
.stop_bits
= 1;
1519 info
->params
.parity
= ASYNC_PARITY_NONE
;
1520 if (cflag
& PARENB
) {
1522 info
->params
.parity
= ASYNC_PARITY_ODD
;
1524 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1527 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1531 /* calculate number of jiffies to transmit a full
1532 * FIFO (32 bytes) at specified data rate
1534 bits_per_char
= info
->params
.data_bits
+
1535 info
->params
.stop_bits
+ 1;
1537 /* if port data rate is set to 460800 or less then
1538 * allow tty settings to override, otherwise keep the
1539 * current data rate.
1541 if (info
->params
.data_rate
<= 460800) {
1542 info
->params
.data_rate
= tty_get_baud_rate(info
->tty
);
1545 if ( info
->params
.data_rate
) {
1546 info
->timeout
= (32*HZ
*bits_per_char
) /
1547 info
->params
.data_rate
;
1549 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1551 if (cflag
& CRTSCTS
)
1552 info
->flags
|= ASYNC_CTS_FLOW
;
1554 info
->flags
&= ~ASYNC_CTS_FLOW
;
1557 info
->flags
&= ~ASYNC_CHECK_CD
;
1559 info
->flags
|= ASYNC_CHECK_CD
;
1561 /* process tty input control flags */
1563 info
->read_status_mask
= 0;
1564 if (I_INPCK(info
->tty
))
1565 info
->read_status_mask
|= BIT7
| BIT6
;
1566 if (I_IGNPAR(info
->tty
))
1567 info
->ignore_status_mask
|= BIT7
| BIT6
;
1569 mgslpc_program_hw(info
);
1572 /* Add a character to the transmit buffer
1574 static void mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1576 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1577 unsigned long flags
;
1579 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1580 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1581 __FILE__
,__LINE__
,ch
,info
->device_name
);
1584 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1590 spin_lock_irqsave(&info
->lock
,flags
);
1592 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1593 if (info
->tx_count
< TXBUFSIZE
- 1) {
1594 info
->tx_buf
[info
->tx_put
++] = ch
;
1595 info
->tx_put
&= TXBUFSIZE
-1;
1600 spin_unlock_irqrestore(&info
->lock
,flags
);
1603 /* Enable transmitter so remaining characters in the
1604 * transmit buffer are sent.
1606 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1608 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1609 unsigned long flags
;
1611 if (debug_level
>= DEBUG_LEVEL_INFO
)
1612 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1613 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1615 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1618 if (info
->tx_count
<= 0 || tty
->stopped
||
1619 tty
->hw_stopped
|| !info
->tx_buf
)
1622 if (debug_level
>= DEBUG_LEVEL_INFO
)
1623 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1624 __FILE__
,__LINE__
,info
->device_name
);
1626 spin_lock_irqsave(&info
->lock
,flags
);
1627 if (!info
->tx_active
)
1629 spin_unlock_irqrestore(&info
->lock
,flags
);
1632 /* Send a block of data
1636 * tty pointer to tty information structure
1637 * buf pointer to buffer containing send data
1638 * count size of send data in bytes
1640 * Returns: number of characters written
1642 static int mgslpc_write(struct tty_struct
* tty
,
1643 const unsigned char *buf
, int count
)
1646 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1647 unsigned long flags
;
1649 if (debug_level
>= DEBUG_LEVEL_INFO
)
1650 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1651 __FILE__
,__LINE__
,info
->device_name
,count
);
1653 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1657 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1658 if (count
> TXBUFSIZE
) {
1662 if (info
->tx_active
)
1664 else if (info
->tx_count
)
1670 min(TXBUFSIZE
- info
->tx_count
- 1,
1671 TXBUFSIZE
- info
->tx_put
));
1675 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1677 spin_lock_irqsave(&info
->lock
,flags
);
1678 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1679 info
->tx_count
+= c
;
1680 spin_unlock_irqrestore(&info
->lock
,flags
);
1687 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
1688 spin_lock_irqsave(&info
->lock
,flags
);
1689 if (!info
->tx_active
)
1691 spin_unlock_irqrestore(&info
->lock
,flags
);
1694 if (debug_level
>= DEBUG_LEVEL_INFO
)
1695 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1696 __FILE__
,__LINE__
,info
->device_name
,ret
);
1700 /* Return the count of free bytes in transmit buffer
1702 static int mgslpc_write_room(struct tty_struct
*tty
)
1704 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1707 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1710 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1711 /* HDLC (frame oriented) mode */
1712 if (info
->tx_active
)
1715 return HDLC_MAX_FRAME_SIZE
;
1717 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1722 if (debug_level
>= DEBUG_LEVEL_INFO
)
1723 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1724 __FILE__
,__LINE__
, info
->device_name
, ret
);
1728 /* Return the count of bytes in transmit buffer
1730 static int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1732 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1735 if (debug_level
>= DEBUG_LEVEL_INFO
)
1736 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1737 __FILE__
,__LINE__
, info
->device_name
);
1739 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1742 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1743 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1745 rc
= info
->tx_count
;
1747 if (debug_level
>= DEBUG_LEVEL_INFO
)
1748 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1749 __FILE__
,__LINE__
, info
->device_name
, rc
);
1754 /* Discard all data in the send buffer
1756 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1758 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1759 unsigned long flags
;
1761 if (debug_level
>= DEBUG_LEVEL_INFO
)
1762 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1763 __FILE__
,__LINE__
, info
->device_name
);
1765 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1768 spin_lock_irqsave(&info
->lock
,flags
);
1769 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1770 del_timer(&info
->tx_timer
);
1771 spin_unlock_irqrestore(&info
->lock
,flags
);
1773 wake_up_interruptible(&tty
->write_wait
);
1777 /* Send a high-priority XON/XOFF character
1779 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1781 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1782 unsigned long flags
;
1784 if (debug_level
>= DEBUG_LEVEL_INFO
)
1785 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1786 __FILE__
,__LINE__
, info
->device_name
, ch
);
1788 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1793 spin_lock_irqsave(&info
->lock
,flags
);
1794 if (!info
->tx_enabled
)
1796 spin_unlock_irqrestore(&info
->lock
,flags
);
1800 /* Signal remote device to throttle send data (our receive data)
1802 static void mgslpc_throttle(struct tty_struct
* tty
)
1804 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1805 unsigned long flags
;
1807 if (debug_level
>= DEBUG_LEVEL_INFO
)
1808 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1809 __FILE__
,__LINE__
, info
->device_name
);
1811 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1815 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1817 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1818 spin_lock_irqsave(&info
->lock
,flags
);
1819 info
->serial_signals
&= ~SerialSignal_RTS
;
1821 spin_unlock_irqrestore(&info
->lock
,flags
);
1825 /* Signal remote device to stop throttling send data (our receive data)
1827 static void mgslpc_unthrottle(struct tty_struct
* tty
)
1829 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1830 unsigned long flags
;
1832 if (debug_level
>= DEBUG_LEVEL_INFO
)
1833 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1834 __FILE__
,__LINE__
, info
->device_name
);
1836 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1843 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1846 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1847 spin_lock_irqsave(&info
->lock
,flags
);
1848 info
->serial_signals
|= SerialSignal_RTS
;
1850 spin_unlock_irqrestore(&info
->lock
,flags
);
1854 /* get the current serial statistics
1856 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1859 if (debug_level
>= DEBUG_LEVEL_INFO
)
1860 printk("get_params(%s)\n", info
->device_name
);
1862 memset(&info
->icount
, 0, sizeof(info
->icount
));
1864 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1871 /* get the current serial parameters
1873 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1876 if (debug_level
>= DEBUG_LEVEL_INFO
)
1877 printk("get_params(%s)\n", info
->device_name
);
1878 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1884 /* set the serial parameters
1888 * info pointer to device instance data
1889 * new_params user buffer containing new serial params
1891 * Returns: 0 if success, otherwise error code
1893 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
)
1895 unsigned long flags
;
1896 MGSL_PARAMS tmp_params
;
1899 if (debug_level
>= DEBUG_LEVEL_INFO
)
1900 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1901 info
->device_name
);
1902 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1904 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1905 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1906 __FILE__
,__LINE__
,info
->device_name
);
1910 spin_lock_irqsave(&info
->lock
,flags
);
1911 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
1912 spin_unlock_irqrestore(&info
->lock
,flags
);
1914 mgslpc_change_params(info
);
1919 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
1922 if (debug_level
>= DEBUG_LEVEL_INFO
)
1923 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
1924 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
1930 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
1932 unsigned long flags
;
1933 if (debug_level
>= DEBUG_LEVEL_INFO
)
1934 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
1935 spin_lock_irqsave(&info
->lock
,flags
);
1936 info
->idle_mode
= idle_mode
;
1938 spin_unlock_irqrestore(&info
->lock
,flags
);
1942 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
1945 if (debug_level
>= DEBUG_LEVEL_INFO
)
1946 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
1947 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
1953 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
1955 unsigned long flags
;
1957 if (debug_level
>= DEBUG_LEVEL_INFO
)
1958 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
1959 spin_lock_irqsave(&info
->lock
,flags
);
1960 info
->if_mode
= if_mode
;
1962 val
= read_reg(info
, PVR
) & 0x0f;
1963 switch (info
->if_mode
)
1965 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
1966 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
1967 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
1969 write_reg(info
, PVR
, val
);
1971 spin_unlock_irqrestore(&info
->lock
,flags
);
1975 static int set_txenable(MGSLPC_INFO
* info
, int enable
)
1977 unsigned long flags
;
1979 if (debug_level
>= DEBUG_LEVEL_INFO
)
1980 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
1982 spin_lock_irqsave(&info
->lock
,flags
);
1984 if (!info
->tx_enabled
)
1987 if (info
->tx_enabled
)
1990 spin_unlock_irqrestore(&info
->lock
,flags
);
1994 static int tx_abort(MGSLPC_INFO
* info
)
1996 unsigned long flags
;
1998 if (debug_level
>= DEBUG_LEVEL_INFO
)
1999 printk("tx_abort(%s)\n", info
->device_name
);
2001 spin_lock_irqsave(&info
->lock
,flags
);
2002 if (info
->tx_active
&& info
->tx_count
&&
2003 info
->params
.mode
== MGSL_MODE_HDLC
) {
2004 /* clear data count so FIFO is not filled on next IRQ.
2005 * This results in underrun and abort transmission.
2007 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
2008 info
->tx_aborting
= TRUE
;
2010 spin_unlock_irqrestore(&info
->lock
,flags
);
2014 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
2016 unsigned long flags
;
2018 if (debug_level
>= DEBUG_LEVEL_INFO
)
2019 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
2021 spin_lock_irqsave(&info
->lock
,flags
);
2023 if (!info
->rx_enabled
)
2026 if (info
->rx_enabled
)
2029 spin_unlock_irqrestore(&info
->lock
,flags
);
2033 /* wait for specified event to occur
2035 * Arguments: info pointer to device instance data
2036 * mask pointer to bitmask of events to wait for
2037 * Return Value: 0 if successful and bit mask updated with
2038 * of events triggerred,
2039 * otherwise error code
2041 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
2043 unsigned long flags
;
2046 struct mgsl_icount cprev
, cnow
;
2049 struct _input_signal_events oldsigs
, newsigs
;
2050 DECLARE_WAITQUEUE(wait
, current
);
2052 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
2056 if (debug_level
>= DEBUG_LEVEL_INFO
)
2057 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
2059 spin_lock_irqsave(&info
->lock
,flags
);
2061 /* return immediately if state matches requested events */
2063 s
= info
->serial_signals
;
2065 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
2066 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
2067 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
2068 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
2070 spin_unlock_irqrestore(&info
->lock
,flags
);
2074 /* save current irq counts */
2075 cprev
= info
->icount
;
2076 oldsigs
= info
->input_signal_events
;
2078 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
2079 (mask
& MgslEvent_ExitHuntMode
))
2080 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
2082 set_current_state(TASK_INTERRUPTIBLE
);
2083 add_wait_queue(&info
->event_wait_q
, &wait
);
2085 spin_unlock_irqrestore(&info
->lock
,flags
);
2090 if (signal_pending(current
)) {
2095 /* get current irq counts */
2096 spin_lock_irqsave(&info
->lock
,flags
);
2097 cnow
= info
->icount
;
2098 newsigs
= info
->input_signal_events
;
2099 set_current_state(TASK_INTERRUPTIBLE
);
2100 spin_unlock_irqrestore(&info
->lock
,flags
);
2102 /* if no change, wait aborted for some reason */
2103 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2104 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2105 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2106 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2107 newsigs
.cts_up
== oldsigs
.cts_up
&&
2108 newsigs
.cts_down
== oldsigs
.cts_down
&&
2109 newsigs
.ri_up
== oldsigs
.ri_up
&&
2110 newsigs
.ri_down
== oldsigs
.ri_down
&&
2111 cnow
.exithunt
== cprev
.exithunt
&&
2112 cnow
.rxidle
== cprev
.rxidle
) {
2118 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2119 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2120 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2121 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2122 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2123 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2124 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2125 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2126 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2127 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2135 remove_wait_queue(&info
->event_wait_q
, &wait
);
2136 set_current_state(TASK_RUNNING
);
2138 if (mask
& MgslEvent_ExitHuntMode
) {
2139 spin_lock_irqsave(&info
->lock
,flags
);
2140 if (!waitqueue_active(&info
->event_wait_q
))
2141 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2142 spin_unlock_irqrestore(&info
->lock
,flags
);
2146 PUT_USER(rc
, events
, mask_ptr
);
2150 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2152 unsigned long flags
;
2154 struct mgsl_icount cprev
, cnow
;
2155 DECLARE_WAITQUEUE(wait
, current
);
2157 /* save current irq counts */
2158 spin_lock_irqsave(&info
->lock
,flags
);
2159 cprev
= info
->icount
;
2160 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2161 set_current_state(TASK_INTERRUPTIBLE
);
2162 spin_unlock_irqrestore(&info
->lock
,flags
);
2166 if (signal_pending(current
)) {
2171 /* get new irq counts */
2172 spin_lock_irqsave(&info
->lock
,flags
);
2173 cnow
= info
->icount
;
2174 set_current_state(TASK_INTERRUPTIBLE
);
2175 spin_unlock_irqrestore(&info
->lock
,flags
);
2177 /* if no change, wait aborted for some reason */
2178 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2179 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2184 /* check for change in caller specified modem input */
2185 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2186 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2187 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2188 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2195 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2196 set_current_state(TASK_RUNNING
);
2200 /* return the state of the serial control and status signals
2202 static int tiocmget(struct tty_struct
*tty
, struct file
*file
)
2204 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2205 unsigned int result
;
2206 unsigned long flags
;
2208 spin_lock_irqsave(&info
->lock
,flags
);
2210 spin_unlock_irqrestore(&info
->lock
,flags
);
2212 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2213 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2214 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2215 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2216 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2217 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2219 if (debug_level
>= DEBUG_LEVEL_INFO
)
2220 printk("%s(%d):%s tiocmget() value=%08X\n",
2221 __FILE__
,__LINE__
, info
->device_name
, result
);
2225 /* set modem control signals (DTR/RTS)
2227 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
2228 unsigned int set
, unsigned int clear
)
2230 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2231 unsigned long flags
;
2233 if (debug_level
>= DEBUG_LEVEL_INFO
)
2234 printk("%s(%d):%s tiocmset(%x,%x)\n",
2235 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
2237 if (set
& TIOCM_RTS
)
2238 info
->serial_signals
|= SerialSignal_RTS
;
2239 if (set
& TIOCM_DTR
)
2240 info
->serial_signals
|= SerialSignal_DTR
;
2241 if (clear
& TIOCM_RTS
)
2242 info
->serial_signals
&= ~SerialSignal_RTS
;
2243 if (clear
& TIOCM_DTR
)
2244 info
->serial_signals
&= ~SerialSignal_DTR
;
2246 spin_lock_irqsave(&info
->lock
,flags
);
2248 spin_unlock_irqrestore(&info
->lock
,flags
);
2253 /* Set or clear transmit break condition
2255 * Arguments: tty pointer to tty instance data
2256 * break_state -1=set break condition, 0=clear
2258 static void mgslpc_break(struct tty_struct
*tty
, int break_state
)
2260 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2261 unsigned long flags
;
2263 if (debug_level
>= DEBUG_LEVEL_INFO
)
2264 printk("%s(%d):mgslpc_break(%s,%d)\n",
2265 __FILE__
,__LINE__
, info
->device_name
, break_state
);
2267 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2270 spin_lock_irqsave(&info
->lock
,flags
);
2271 if (break_state
== -1)
2272 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2274 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2275 spin_unlock_irqrestore(&info
->lock
,flags
);
2278 /* Service an IOCTL request
2282 * tty pointer to tty instance data
2283 * file pointer to associated file object for device
2284 * cmd IOCTL command code
2285 * arg command argument/context
2287 * Return Value: 0 if success, otherwise error code
2289 static int mgslpc_ioctl(struct tty_struct
*tty
, struct file
* file
,
2290 unsigned int cmd
, unsigned long arg
)
2292 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2294 if (debug_level
>= DEBUG_LEVEL_INFO
)
2295 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2296 info
->device_name
, cmd
);
2298 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2301 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2302 (cmd
!= TIOCMIWAIT
) && (cmd
!= TIOCGICOUNT
)) {
2303 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2307 return ioctl_common(info
, cmd
, arg
);
2310 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
)
2313 struct mgsl_icount cnow
; /* kernel counter temps */
2314 struct serial_icounter_struct __user
*p_cuser
; /* user space */
2315 void __user
*argp
= (void __user
*)arg
;
2316 unsigned long flags
;
2319 case MGSL_IOCGPARAMS
:
2320 return get_params(info
, argp
);
2321 case MGSL_IOCSPARAMS
:
2322 return set_params(info
, argp
);
2323 case MGSL_IOCGTXIDLE
:
2324 return get_txidle(info
, argp
);
2325 case MGSL_IOCSTXIDLE
:
2326 return set_txidle(info
, (int)arg
);
2328 return get_interface(info
, argp
);
2330 return set_interface(info
,(int)arg
);
2331 case MGSL_IOCTXENABLE
:
2332 return set_txenable(info
,(int)arg
);
2333 case MGSL_IOCRXENABLE
:
2334 return set_rxenable(info
,(int)arg
);
2335 case MGSL_IOCTXABORT
:
2336 return tx_abort(info
);
2337 case MGSL_IOCGSTATS
:
2338 return get_stats(info
, argp
);
2339 case MGSL_IOCWAITEVENT
:
2340 return wait_events(info
, argp
);
2342 return modem_input_wait(info
,(int)arg
);
2344 spin_lock_irqsave(&info
->lock
,flags
);
2345 cnow
= info
->icount
;
2346 spin_unlock_irqrestore(&info
->lock
,flags
);
2348 PUT_USER(error
,cnow
.cts
, &p_cuser
->cts
);
2349 if (error
) return error
;
2350 PUT_USER(error
,cnow
.dsr
, &p_cuser
->dsr
);
2351 if (error
) return error
;
2352 PUT_USER(error
,cnow
.rng
, &p_cuser
->rng
);
2353 if (error
) return error
;
2354 PUT_USER(error
,cnow
.dcd
, &p_cuser
->dcd
);
2355 if (error
) return error
;
2356 PUT_USER(error
,cnow
.rx
, &p_cuser
->rx
);
2357 if (error
) return error
;
2358 PUT_USER(error
,cnow
.tx
, &p_cuser
->tx
);
2359 if (error
) return error
;
2360 PUT_USER(error
,cnow
.frame
, &p_cuser
->frame
);
2361 if (error
) return error
;
2362 PUT_USER(error
,cnow
.overrun
, &p_cuser
->overrun
);
2363 if (error
) return error
;
2364 PUT_USER(error
,cnow
.parity
, &p_cuser
->parity
);
2365 if (error
) return error
;
2366 PUT_USER(error
,cnow
.brk
, &p_cuser
->brk
);
2367 if (error
) return error
;
2368 PUT_USER(error
,cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
2369 if (error
) return error
;
2372 return -ENOIOCTLCMD
;
2377 /* Set new termios settings
2381 * tty pointer to tty structure
2382 * termios pointer to buffer to hold returned old termios
2384 static void mgslpc_set_termios(struct tty_struct
*tty
, struct termios
*old_termios
)
2386 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2387 unsigned long flags
;
2389 if (debug_level
>= DEBUG_LEVEL_INFO
)
2390 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2391 tty
->driver
->name
);
2393 /* just return if nothing has changed */
2394 if ((tty
->termios
->c_cflag
== old_termios
->c_cflag
)
2395 && (RELEVANT_IFLAG(tty
->termios
->c_iflag
)
2396 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2399 mgslpc_change_params(info
);
2401 /* Handle transition to B0 status */
2402 if (old_termios
->c_cflag
& CBAUD
&&
2403 !(tty
->termios
->c_cflag
& CBAUD
)) {
2404 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2405 spin_lock_irqsave(&info
->lock
,flags
);
2407 spin_unlock_irqrestore(&info
->lock
,flags
);
2410 /* Handle transition away from B0 status */
2411 if (!(old_termios
->c_cflag
& CBAUD
) &&
2412 tty
->termios
->c_cflag
& CBAUD
) {
2413 info
->serial_signals
|= SerialSignal_DTR
;
2414 if (!(tty
->termios
->c_cflag
& CRTSCTS
) ||
2415 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2416 info
->serial_signals
|= SerialSignal_RTS
;
2418 spin_lock_irqsave(&info
->lock
,flags
);
2420 spin_unlock_irqrestore(&info
->lock
,flags
);
2423 /* Handle turning off CRTSCTS */
2424 if (old_termios
->c_cflag
& CRTSCTS
&&
2425 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2426 tty
->hw_stopped
= 0;
2431 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2433 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2435 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2438 if (debug_level
>= DEBUG_LEVEL_INFO
)
2439 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2440 __FILE__
,__LINE__
, info
->device_name
, info
->count
);
2445 if (tty_hung_up_p(filp
))
2448 if ((tty
->count
== 1) && (info
->count
!= 1)) {
2450 * tty->count is 1 and the tty structure will be freed.
2451 * info->count should be one in this case.
2452 * if it's not, correct it so that the port is shutdown.
2454 printk("mgslpc_close: bad refcount; tty->count is 1, "
2455 "info->count is %d\n", info
->count
);
2461 /* if at least one open remaining, leave hardware active */
2465 info
->flags
|= ASYNC_CLOSING
;
2467 /* set tty->closing to notify line discipline to
2468 * only process XON/XOFF characters. Only the N_TTY
2469 * discipline appears to use this (ppp does not).
2473 /* wait for transmit data to clear all layers */
2475 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
) {
2476 if (debug_level
>= DEBUG_LEVEL_INFO
)
2477 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2478 __FILE__
,__LINE__
, info
->device_name
);
2479 tty_wait_until_sent(tty
, info
->closing_wait
);
2482 if (info
->flags
& ASYNC_INITIALIZED
)
2483 mgslpc_wait_until_sent(tty
, info
->timeout
);
2485 if (tty
->driver
->flush_buffer
)
2486 tty
->driver
->flush_buffer(tty
);
2488 ldisc_flush_buffer(tty
);
2495 if (info
->blocked_open
) {
2496 if (info
->close_delay
) {
2497 msleep_interruptible(jiffies_to_msecs(info
->close_delay
));
2499 wake_up_interruptible(&info
->open_wait
);
2502 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
|ASYNC_CLOSING
);
2504 wake_up_interruptible(&info
->close_wait
);
2507 if (debug_level
>= DEBUG_LEVEL_INFO
)
2508 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2509 tty
->driver
->name
, info
->count
);
2512 /* Wait until the transmitter is empty.
2514 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2516 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2517 unsigned long orig_jiffies
, char_time
;
2522 if (debug_level
>= DEBUG_LEVEL_INFO
)
2523 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2524 __FILE__
,__LINE__
, info
->device_name
);
2526 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2529 if (!(info
->flags
& ASYNC_INITIALIZED
))
2532 orig_jiffies
= jiffies
;
2534 /* Set check interval to 1/5 of estimated time to
2535 * send a character, and make it at least 1. The check
2536 * interval should also be less than the timeout.
2537 * Note: use tight timings here to satisfy the NIST-PCTS.
2540 if ( info
->params
.data_rate
) {
2541 char_time
= info
->timeout
/(32 * 5);
2548 char_time
= min_t(unsigned long, char_time
, timeout
);
2550 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2551 while (info
->tx_active
) {
2552 msleep_interruptible(jiffies_to_msecs(char_time
));
2553 if (signal_pending(current
))
2555 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2559 while ((info
->tx_count
|| info
->tx_active
) &&
2561 msleep_interruptible(jiffies_to_msecs(char_time
));
2562 if (signal_pending(current
))
2564 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2570 if (debug_level
>= DEBUG_LEVEL_INFO
)
2571 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2572 __FILE__
,__LINE__
, info
->device_name
);
2575 /* Called by tty_hangup() when a hangup is signaled.
2576 * This is the same as closing all open files for the port.
2578 static void mgslpc_hangup(struct tty_struct
*tty
)
2580 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2582 if (debug_level
>= DEBUG_LEVEL_INFO
)
2583 printk("%s(%d):mgslpc_hangup(%s)\n",
2584 __FILE__
,__LINE__
, info
->device_name
);
2586 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2589 mgslpc_flush_buffer(tty
);
2593 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2596 wake_up_interruptible(&info
->open_wait
);
2599 /* Block the current process until the specified port
2600 * is ready to be opened.
2602 static int block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
2605 DECLARE_WAITQUEUE(wait
, current
);
2607 int do_clocal
= 0, extra_count
= 0;
2608 unsigned long flags
;
2610 if (debug_level
>= DEBUG_LEVEL_INFO
)
2611 printk("%s(%d):block_til_ready on %s\n",
2612 __FILE__
,__LINE__
, tty
->driver
->name
);
2614 if (filp
->f_flags
& O_NONBLOCK
|| tty
->flags
& (1 << TTY_IO_ERROR
)){
2615 /* nonblock mode is set or port is not enabled */
2616 /* just verify that callout device is not active */
2617 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2621 if (tty
->termios
->c_cflag
& CLOCAL
)
2624 /* Wait for carrier detect and the line to become
2625 * free (i.e., not in use by the callout). While we are in
2626 * this loop, info->count is dropped by one, so that
2627 * mgslpc_close() knows when to free things. We restore it upon
2628 * exit, either normal or abnormal.
2632 add_wait_queue(&info
->open_wait
, &wait
);
2634 if (debug_level
>= DEBUG_LEVEL_INFO
)
2635 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2636 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2638 spin_lock_irqsave(&info
->lock
, flags
);
2639 if (!tty_hung_up_p(filp
)) {
2643 spin_unlock_irqrestore(&info
->lock
, flags
);
2644 info
->blocked_open
++;
2647 if ((tty
->termios
->c_cflag
& CBAUD
)) {
2648 spin_lock_irqsave(&info
->lock
,flags
);
2649 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2651 spin_unlock_irqrestore(&info
->lock
,flags
);
2654 set_current_state(TASK_INTERRUPTIBLE
);
2656 if (tty_hung_up_p(filp
) || !(info
->flags
& ASYNC_INITIALIZED
)){
2657 retval
= (info
->flags
& ASYNC_HUP_NOTIFY
) ?
2658 -EAGAIN
: -ERESTARTSYS
;
2662 spin_lock_irqsave(&info
->lock
,flags
);
2664 spin_unlock_irqrestore(&info
->lock
,flags
);
2666 if (!(info
->flags
& ASYNC_CLOSING
) &&
2667 (do_clocal
|| (info
->serial_signals
& SerialSignal_DCD
)) ) {
2671 if (signal_pending(current
)) {
2672 retval
= -ERESTARTSYS
;
2676 if (debug_level
>= DEBUG_LEVEL_INFO
)
2677 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2678 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2683 set_current_state(TASK_RUNNING
);
2684 remove_wait_queue(&info
->open_wait
, &wait
);
2688 info
->blocked_open
--;
2690 if (debug_level
>= DEBUG_LEVEL_INFO
)
2691 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2692 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2695 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2700 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2704 unsigned long flags
;
2706 /* verify range of specified line number */
2708 if ((line
< 0) || (line
>= mgslpc_device_count
)) {
2709 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2710 __FILE__
,__LINE__
,line
);
2714 /* find the info structure for the specified line */
2715 info
= mgslpc_device_list
;
2716 while(info
&& info
->line
!= line
)
2717 info
= info
->next_device
;
2718 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2721 tty
->driver_data
= info
;
2724 if (debug_level
>= DEBUG_LEVEL_INFO
)
2725 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2726 __FILE__
,__LINE__
,tty
->driver
->name
, info
->count
);
2728 /* If port is closing, signal caller to try again */
2729 if (tty_hung_up_p(filp
) || info
->flags
& ASYNC_CLOSING
){
2730 if (info
->flags
& ASYNC_CLOSING
)
2731 interruptible_sleep_on(&info
->close_wait
);
2732 retval
= ((info
->flags
& ASYNC_HUP_NOTIFY
) ?
2733 -EAGAIN
: -ERESTARTSYS
);
2737 info
->tty
->low_latency
= (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2739 spin_lock_irqsave(&info
->netlock
, flags
);
2740 if (info
->netcount
) {
2742 spin_unlock_irqrestore(&info
->netlock
, flags
);
2746 spin_unlock_irqrestore(&info
->netlock
, flags
);
2748 if (info
->count
== 1) {
2749 /* 1st open on this device, init hardware */
2750 retval
= startup(info
);
2755 retval
= block_til_ready(tty
, filp
, info
);
2757 if (debug_level
>= DEBUG_LEVEL_INFO
)
2758 printk("%s(%d):block_til_ready(%s) returned %d\n",
2759 __FILE__
,__LINE__
, info
->device_name
, retval
);
2763 if (debug_level
>= DEBUG_LEVEL_INFO
)
2764 printk("%s(%d):mgslpc_open(%s) success\n",
2765 __FILE__
,__LINE__
, info
->device_name
);
2770 if (tty
->count
== 1)
2771 info
->tty
= NULL
; /* tty layer will release tty struct */
2780 * /proc fs routines....
2783 static inline int line_info(char *buf
, MGSLPC_INFO
*info
)
2787 unsigned long flags
;
2789 ret
= sprintf(buf
, "%s:io:%04X irq:%d",
2790 info
->device_name
, info
->io_base
, info
->irq_level
);
2792 /* output current serial signal states */
2793 spin_lock_irqsave(&info
->lock
,flags
);
2795 spin_unlock_irqrestore(&info
->lock
,flags
);
2799 if (info
->serial_signals
& SerialSignal_RTS
)
2800 strcat(stat_buf
, "|RTS");
2801 if (info
->serial_signals
& SerialSignal_CTS
)
2802 strcat(stat_buf
, "|CTS");
2803 if (info
->serial_signals
& SerialSignal_DTR
)
2804 strcat(stat_buf
, "|DTR");
2805 if (info
->serial_signals
& SerialSignal_DSR
)
2806 strcat(stat_buf
, "|DSR");
2807 if (info
->serial_signals
& SerialSignal_DCD
)
2808 strcat(stat_buf
, "|CD");
2809 if (info
->serial_signals
& SerialSignal_RI
)
2810 strcat(stat_buf
, "|RI");
2812 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2813 ret
+= sprintf(buf
+ret
, " HDLC txok:%d rxok:%d",
2814 info
->icount
.txok
, info
->icount
.rxok
);
2815 if (info
->icount
.txunder
)
2816 ret
+= sprintf(buf
+ret
, " txunder:%d", info
->icount
.txunder
);
2817 if (info
->icount
.txabort
)
2818 ret
+= sprintf(buf
+ret
, " txabort:%d", info
->icount
.txabort
);
2819 if (info
->icount
.rxshort
)
2820 ret
+= sprintf(buf
+ret
, " rxshort:%d", info
->icount
.rxshort
);
2821 if (info
->icount
.rxlong
)
2822 ret
+= sprintf(buf
+ret
, " rxlong:%d", info
->icount
.rxlong
);
2823 if (info
->icount
.rxover
)
2824 ret
+= sprintf(buf
+ret
, " rxover:%d", info
->icount
.rxover
);
2825 if (info
->icount
.rxcrc
)
2826 ret
+= sprintf(buf
+ret
, " rxcrc:%d", info
->icount
.rxcrc
);
2828 ret
+= sprintf(buf
+ret
, " ASYNC tx:%d rx:%d",
2829 info
->icount
.tx
, info
->icount
.rx
);
2830 if (info
->icount
.frame
)
2831 ret
+= sprintf(buf
+ret
, " fe:%d", info
->icount
.frame
);
2832 if (info
->icount
.parity
)
2833 ret
+= sprintf(buf
+ret
, " pe:%d", info
->icount
.parity
);
2834 if (info
->icount
.brk
)
2835 ret
+= sprintf(buf
+ret
, " brk:%d", info
->icount
.brk
);
2836 if (info
->icount
.overrun
)
2837 ret
+= sprintf(buf
+ret
, " oe:%d", info
->icount
.overrun
);
2840 /* Append serial signal status to end */
2841 ret
+= sprintf(buf
+ret
, " %s\n", stat_buf
+1);
2843 ret
+= sprintf(buf
+ret
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2844 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2850 /* Called to print information about devices
2852 static int mgslpc_read_proc(char *page
, char **start
, off_t off
, int count
,
2853 int *eof
, void *data
)
2859 len
+= sprintf(page
, "synclink driver:%s\n", driver_version
);
2861 info
= mgslpc_device_list
;
2863 l
= line_info(page
+ len
, info
);
2865 if (len
+begin
> off
+count
)
2867 if (len
+begin
< off
) {
2871 info
= info
->next_device
;
2876 if (off
>= len
+begin
)
2878 *start
= page
+ (off
-begin
);
2879 return ((count
< begin
+len
-off
) ? count
: begin
+len
-off
);
2882 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2884 /* each buffer has header and data */
2885 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2887 /* calculate total allocation size for 8 buffers */
2888 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2890 /* limit total allocated memory */
2891 if (info
->rx_buf_total_size
> 0x10000)
2892 info
->rx_buf_total_size
= 0x10000;
2894 /* calculate number of buffers */
2895 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2897 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2898 if (info
->rx_buf
== NULL
)
2901 rx_reset_buffers(info
);
2905 static void rx_free_buffers(MGSLPC_INFO
*info
)
2907 kfree(info
->rx_buf
);
2908 info
->rx_buf
= NULL
;
2911 static int claim_resources(MGSLPC_INFO
*info
)
2913 if (rx_alloc_buffers(info
) < 0 ) {
2914 printk( "Cant allocate rx buffer %s\n", info
->device_name
);
2915 release_resources(info
);
2921 static void release_resources(MGSLPC_INFO
*info
)
2923 if (debug_level
>= DEBUG_LEVEL_INFO
)
2924 printk("release_resources(%s)\n", info
->device_name
);
2925 rx_free_buffers(info
);
2928 /* Add the specified device instance data structure to the
2929 * global linked list of devices and increment the device count.
2931 * Arguments: info pointer to device instance data
2933 static void mgslpc_add_device(MGSLPC_INFO
*info
)
2935 info
->next_device
= NULL
;
2936 info
->line
= mgslpc_device_count
;
2937 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2939 if (info
->line
< MAX_DEVICE_COUNT
) {
2940 if (maxframe
[info
->line
])
2941 info
->max_frame_size
= maxframe
[info
->line
];
2942 info
->dosyncppp
= dosyncppp
[info
->line
];
2945 mgslpc_device_count
++;
2947 if (!mgslpc_device_list
)
2948 mgslpc_device_list
= info
;
2950 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
2951 while( current_dev
->next_device
)
2952 current_dev
= current_dev
->next_device
;
2953 current_dev
->next_device
= info
;
2956 if (info
->max_frame_size
< 4096)
2957 info
->max_frame_size
= 4096;
2958 else if (info
->max_frame_size
> 65535)
2959 info
->max_frame_size
= 65535;
2961 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2962 info
->device_name
, info
->io_base
, info
->irq_level
);
2969 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2971 MGSLPC_INFO
*info
= mgslpc_device_list
;
2972 MGSLPC_INFO
*last
= NULL
;
2975 if (info
== remove_info
) {
2977 last
->next_device
= info
->next_device
;
2979 mgslpc_device_list
= info
->next_device
;
2983 release_resources(info
);
2985 mgslpc_device_count
--;
2989 info
= info
->next_device
;
2993 static struct pcmcia_device_id mgslpc_ids
[] = {
2994 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2997 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2999 static struct pcmcia_driver mgslpc_driver
= {
3000 .owner
= THIS_MODULE
,
3002 .name
= "synclink_cs",
3004 .probe
= mgslpc_probe
,
3005 .remove
= mgslpc_detach
,
3006 .id_table
= mgslpc_ids
,
3007 .suspend
= mgslpc_suspend
,
3008 .resume
= mgslpc_resume
,
3011 static const struct tty_operations mgslpc_ops
= {
3012 .open
= mgslpc_open
,
3013 .close
= mgslpc_close
,
3014 .write
= mgslpc_write
,
3015 .put_char
= mgslpc_put_char
,
3016 .flush_chars
= mgslpc_flush_chars
,
3017 .write_room
= mgslpc_write_room
,
3018 .chars_in_buffer
= mgslpc_chars_in_buffer
,
3019 .flush_buffer
= mgslpc_flush_buffer
,
3020 .ioctl
= mgslpc_ioctl
,
3021 .throttle
= mgslpc_throttle
,
3022 .unthrottle
= mgslpc_unthrottle
,
3023 .send_xchar
= mgslpc_send_xchar
,
3024 .break_ctl
= mgslpc_break
,
3025 .wait_until_sent
= mgslpc_wait_until_sent
,
3026 .read_proc
= mgslpc_read_proc
,
3027 .set_termios
= mgslpc_set_termios
,
3029 .start
= tx_release
,
3030 .hangup
= mgslpc_hangup
,
3031 .tiocmget
= tiocmget
,
3032 .tiocmset
= tiocmset
,
3035 static void synclink_cs_cleanup(void)
3039 printk("Unloading %s: version %s\n", driver_name
, driver_version
);
3041 while(mgslpc_device_list
)
3042 mgslpc_remove_device(mgslpc_device_list
);
3044 if (serial_driver
) {
3045 if ((rc
= tty_unregister_driver(serial_driver
)))
3046 printk("%s(%d) failed to unregister tty driver err=%d\n",
3047 __FILE__
,__LINE__
,rc
);
3048 put_tty_driver(serial_driver
);
3051 pcmcia_unregister_driver(&mgslpc_driver
);
3054 static int __init
synclink_cs_init(void)
3058 if (break_on_load
) {
3059 mgslpc_get_text_ptr();
3063 printk("%s %s\n", driver_name
, driver_version
);
3065 if ((rc
= pcmcia_register_driver(&mgslpc_driver
)) < 0)
3068 serial_driver
= alloc_tty_driver(MAX_DEVICE_COUNT
);
3069 if (!serial_driver
) {
3074 /* Initialize the tty_driver structure */
3076 serial_driver
->owner
= THIS_MODULE
;
3077 serial_driver
->driver_name
= "synclink_cs";
3078 serial_driver
->name
= "ttySLP";
3079 serial_driver
->major
= ttymajor
;
3080 serial_driver
->minor_start
= 64;
3081 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
3082 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
3083 serial_driver
->init_termios
= tty_std_termios
;
3084 serial_driver
->init_termios
.c_cflag
=
3085 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
3086 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
3087 tty_set_operations(serial_driver
, &mgslpc_ops
);
3089 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
3090 printk("%s(%d):Couldn't register serial driver\n",
3092 put_tty_driver(serial_driver
);
3093 serial_driver
= NULL
;
3097 printk("%s %s, tty major#%d\n",
3098 driver_name
, driver_version
,
3099 serial_driver
->major
);
3104 synclink_cs_cleanup();
3108 static void __exit
synclink_cs_exit(void)
3110 synclink_cs_cleanup();
3113 module_init(synclink_cs_init
);
3114 module_exit(synclink_cs_exit
);
3116 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
3121 /* note:standard BRG mode is broken in V3.2 chip
3122 * so enhanced mode is always used
3130 for (M
= 1; N
> 64 && M
< 16; M
++)
3136 * BGR[7..0] contained in BGR register
3137 * BGR[9..8] contained in CCR2[7..6]
3138 * divisor = (N+1)*2^M
3140 * Note: M *must* not be zero (causes asymetric duty cycle)
3142 write_reg(info
, (unsigned char) (channel
+ BGR
),
3143 (unsigned char) ((M
<< 6) + N
));
3144 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
3145 val
|= ((M
<< 4) & 0xc0);
3146 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
3150 /* Enabled the AUX clock output at the specified frequency.
3152 static void enable_auxclk(MGSLPC_INFO
*info
)
3158 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3159 * 05 ADM Address Mode, 0 = no addr recognition
3160 * 04 TMD Timer Mode, 0 = external
3161 * 03 RAC Receiver Active, 0 = inactive
3162 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3163 * 01 TRS Timer Resolution, 1=512
3164 * 00 TLP Test Loop, 0 = no loop
3170 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3171 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3173 write_reg(info
, CHB
+ MODE
, val
);
3177 * 07 PU Power Up, 1=active, 0=power down
3178 * 06 MCE Master Clock Enable, 1=enabled
3180 * 04..02 SC[2..0] Encoding
3181 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3185 write_reg(info
, CHB
+ CCR0
, 0xc0);
3189 * 07 SFLG Shared Flag, 0 = disable shared flags
3190 * 06 GALP Go Active On Loop, 0 = not used
3191 * 05 GLP Go On Loop, 0 = not used
3192 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3193 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3194 * 02..00 CM[2..0] Clock Mode
3198 write_reg(info
, CHB
+ CCR1
, 0x17);
3202 * 07..06 BGR[9..8] Baud rate bits 9..8
3203 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3204 * 04 SSEL Clock source select, 1=submode b
3205 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3206 * 02 RWX Read/Write Exchange 0=disabled
3207 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3208 * 00 DIV, data inversion 0=disabled, 1=enabled
3212 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3213 write_reg(info
, CHB
+ CCR2
, 0x38);
3215 write_reg(info
, CHB
+ CCR2
, 0x30);
3219 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3220 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3221 * 05 TST1 Test Pin, 0=normal operation
3222 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3223 * 03..02 Reserved, must be 0
3224 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3228 write_reg(info
, CHB
+ CCR4
, 0x50);
3230 /* if auxclk not enabled, set internal BRG so
3231 * CTS transitions can be detected (requires TxC)
3233 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3234 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
3236 mgslpc_set_rate(info
, CHB
, 921600);
3239 static void loopback_enable(MGSLPC_INFO
*info
)
3243 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3244 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
3245 write_reg(info
, CHA
+ CCR1
, val
);
3247 /* CCR2:04 SSEL Clock source select, 1=submode b */
3248 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3249 write_reg(info
, CHA
+ CCR2
, val
);
3251 /* set LinkSpeed if available, otherwise default to 2Mbps */
3252 if (info
->params
.clock_speed
)
3253 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3255 mgslpc_set_rate(info
, CHA
, 1843200);
3257 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3258 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3259 write_reg(info
, CHA
+ MODE
, val
);
3262 static void hdlc_mode(MGSLPC_INFO
*info
)
3265 unsigned char clkmode
, clksubmode
;
3267 /* disable all interrupts */
3268 irq_disable(info
, CHA
, 0xffff);
3269 irq_disable(info
, CHB
, 0xffff);
3270 port_irq_disable(info
, 0xff);
3272 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3273 clkmode
= clksubmode
= 0;
3274 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3275 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3276 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3278 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3279 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3280 /* clock mode 7b, rcv = BRG, xmt = BRG */
3283 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3284 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3285 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3289 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3292 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3293 /* clock mode 0b, rcv = RxC, xmt = BRG */
3299 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3300 * 05 ADM Address Mode, 0 = no addr recognition
3301 * 04 TMD Timer Mode, 0 = external
3302 * 03 RAC Receiver Active, 0 = inactive
3303 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3304 * 01 TRS Timer Resolution, 1=512
3305 * 00 TLP Test Loop, 0 = no loop
3310 if (info
->params
.loopback
)
3313 /* preserve RTS state */
3314 if (info
->serial_signals
& SerialSignal_RTS
)
3316 write_reg(info
, CHA
+ MODE
, val
);
3320 * 07 PU Power Up, 1=active, 0=power down
3321 * 06 MCE Master Clock Enable, 1=enabled
3323 * 04..02 SC[2..0] Encoding
3324 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3329 switch (info
->params
.encoding
)
3331 case HDLC_ENCODING_NRZI
:
3334 case HDLC_ENCODING_BIPHASE_SPACE
:
3337 case HDLC_ENCODING_BIPHASE_MARK
:
3340 case HDLC_ENCODING_BIPHASE_LEVEL
:
3342 break; // Manchester
3344 write_reg(info
, CHA
+ CCR0
, val
);
3348 * 07 SFLG Shared Flag, 0 = disable shared flags
3349 * 06 GALP Go Active On Loop, 0 = not used
3350 * 05 GLP Go On Loop, 0 = not used
3351 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3352 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3353 * 02..00 CM[2..0] Clock Mode
3357 val
= 0x10 + clkmode
;
3358 write_reg(info
, CHA
+ CCR1
, val
);
3362 * 07..06 BGR[9..8] Baud rate bits 9..8
3363 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3364 * 04 SSEL Clock source select, 1=submode b
3365 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3366 * 02 RWX Read/Write Exchange 0=disabled
3367 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3368 * 00 DIV, data inversion 0=disabled, 1=enabled
3373 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3374 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3378 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3380 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3382 write_reg(info
, CHA
+ CCR2
, val
);
3386 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3387 * 05 EPT Enable preamble transmission, 1=enabled
3388 * 04 RADD Receive address pushed to FIFO, 0=disabled
3389 * 03 CRL CRC Reset Level, 0=FFFF
3390 * 02 RCRC Rx CRC 0=On 1=Off
3391 * 01 TCRC Tx CRC 0=On 1=Off
3392 * 00 PSD DPLL Phase Shift Disable
3397 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3399 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3401 switch (info
->params
.preamble_length
)
3403 case HDLC_PREAMBLE_LENGTH_16BITS
:
3406 case HDLC_PREAMBLE_LENGTH_32BITS
:
3409 case HDLC_PREAMBLE_LENGTH_64BITS
:
3413 write_reg(info
, CHA
+ CCR3
, val
);
3415 /* PRE - Preamble pattern */
3417 switch (info
->params
.preamble
)
3419 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3420 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3421 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3422 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3424 write_reg(info
, CHA
+ PRE
, val
);
3428 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3429 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3430 * 05 TST1 Test Pin, 0=normal operation
3431 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3432 * 03..02 Reserved, must be 0
3433 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3438 write_reg(info
, CHA
+ CCR4
, val
);
3439 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3440 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3442 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3444 /* RLCR Receive length check register
3446 * 7 1=enable receive length check
3447 * 6..0 Max frame length = (RL + 1) * 32
3449 write_reg(info
, CHA
+ RLCR
, 0);
3451 /* XBCH Transmit Byte Count High
3453 * 07 DMA mode, 0 = interrupt driven
3454 * 06 NRM, 0=ABM (ignored)
3455 * 05 CAS Carrier Auto Start
3456 * 04 XC Transmit Continuously (ignored)
3457 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3462 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3464 write_reg(info
, CHA
+ XBCH
, val
);
3465 enable_auxclk(info
);
3466 if (info
->params
.loopback
|| info
->testing_irq
)
3467 loopback_enable(info
);
3468 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3470 irq_enable(info
, CHB
, IRQ_CTS
);
3471 /* PVR[3] 1=AUTO CTS active */
3472 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3474 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3476 irq_enable(info
, CHA
,
3477 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3478 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3479 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3480 wait_command_complete(info
, CHA
);
3481 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3483 /* Master clock mode enabled above to allow reset commands
3484 * to complete even if no data clocks are present.
3486 * Disable master clock mode for normal communications because
3487 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3488 * IRQ when in master clock mode.
3490 * Leave master clock mode enabled for IRQ test because the
3491 * timer IRQ used by the test can only happen in master clock mode.
3493 if (!info
->testing_irq
)
3494 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3502 static void rx_stop(MGSLPC_INFO
*info
)
3504 if (debug_level
>= DEBUG_LEVEL_ISR
)
3505 printk("%s(%d):rx_stop(%s)\n",
3506 __FILE__
,__LINE__
, info
->device_name
);
3508 /* MODE:03 RAC Receiver Active, 0=inactive */
3509 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3511 info
->rx_enabled
= 0;
3512 info
->rx_overflow
= 0;
3515 static void rx_start(MGSLPC_INFO
*info
)
3517 if (debug_level
>= DEBUG_LEVEL_ISR
)
3518 printk("%s(%d):rx_start(%s)\n",
3519 __FILE__
,__LINE__
, info
->device_name
);
3521 rx_reset_buffers(info
);
3522 info
->rx_enabled
= 0;
3523 info
->rx_overflow
= 0;
3525 /* MODE:03 RAC Receiver Active, 1=active */
3526 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3528 info
->rx_enabled
= 1;
3531 static void tx_start(MGSLPC_INFO
*info
)
3533 if (debug_level
>= DEBUG_LEVEL_ISR
)
3534 printk("%s(%d):tx_start(%s)\n",
3535 __FILE__
,__LINE__
, info
->device_name
);
3537 if (info
->tx_count
) {
3538 /* If auto RTS enabled and RTS is inactive, then assert */
3539 /* RTS and set a flag indicating that the driver should */
3540 /* negate RTS when the transmission completes. */
3541 info
->drop_rts_on_tx_done
= 0;
3543 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3545 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3546 info
->serial_signals
|= SerialSignal_RTS
;
3548 info
->drop_rts_on_tx_done
= 1;
3552 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3553 if (!info
->tx_active
) {
3554 info
->tx_active
= 1;
3558 info
->tx_active
= 1;
3560 info
->tx_timer
.expires
= jiffies
+ msecs_to_jiffies(5000);
3561 add_timer(&info
->tx_timer
);
3565 if (!info
->tx_enabled
)
3566 info
->tx_enabled
= 1;
3569 static void tx_stop(MGSLPC_INFO
*info
)
3571 if (debug_level
>= DEBUG_LEVEL_ISR
)
3572 printk("%s(%d):tx_stop(%s)\n",
3573 __FILE__
,__LINE__
, info
->device_name
);
3575 del_timer(&info
->tx_timer
);
3577 info
->tx_enabled
= 0;
3578 info
->tx_active
= 0;
3581 /* Reset the adapter to a known state and prepare it for further use.
3583 static void reset_device(MGSLPC_INFO
*info
)
3585 /* power up both channels (set BIT7) */
3586 write_reg(info
, CHA
+ CCR0
, 0x80);
3587 write_reg(info
, CHB
+ CCR0
, 0x80);
3588 write_reg(info
, CHA
+ MODE
, 0);
3589 write_reg(info
, CHB
+ MODE
, 0);
3591 /* disable all interrupts */
3592 irq_disable(info
, CHA
, 0xffff);
3593 irq_disable(info
, CHB
, 0xffff);
3594 port_irq_disable(info
, 0xff);
3596 /* PCR Port Configuration Register
3598 * 07..04 DEC[3..0] Serial I/F select outputs
3599 * 03 output, 1=AUTO CTS control enabled
3600 * 02 RI Ring Indicator input 0=active
3601 * 01 DSR input 0=active
3602 * 00 DTR output 0=active
3606 write_reg(info
, PCR
, 0x06);
3608 /* PVR Port Value Register
3610 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3611 * 03 AUTO CTS output 1=enabled
3612 * 02 RI Ring Indicator input
3614 * 00 DTR output (1=inactive)
3618 // write_reg(info, PVR, PVR_DTR);
3620 /* IPC Interrupt Port Configuration
3622 * 07 VIS 1=Masked interrupts visible
3623 * 06..05 Reserved, 0
3624 * 04..03 SLA Slave address, 00 ignored
3625 * 02 CASM Cascading Mode, 1=daisy chain
3626 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3630 write_reg(info
, IPC
, 0x05);
3633 static void async_mode(MGSLPC_INFO
*info
)
3637 /* disable all interrupts */
3638 irq_disable(info
, CHA
, 0xffff);
3639 irq_disable(info
, CHB
, 0xffff);
3640 port_irq_disable(info
, 0xff);
3645 * 06 FRTS RTS State, 0=active
3646 * 05 FCTS Flow Control on CTS
3647 * 04 FLON Flow Control Enable
3648 * 03 RAC Receiver Active, 0 = inactive
3649 * 02 RTS 0=Auto RTS, 1=manual RTS
3650 * 01 TRS Timer Resolution, 1=512
3651 * 00 TLP Test Loop, 0 = no loop
3656 if (info
->params
.loopback
)
3659 /* preserve RTS state */
3660 if (!(info
->serial_signals
& SerialSignal_RTS
))
3662 write_reg(info
, CHA
+ MODE
, val
);
3666 * 07 PU Power Up, 1=active, 0=power down
3667 * 06 MCE Master Clock Enable, 1=enabled
3669 * 04..02 SC[2..0] Encoding, 000=NRZ
3670 * 01..00 SM[1..0] Serial Mode, 11=Async
3674 write_reg(info
, CHA
+ CCR0
, 0x83);
3678 * 07..05 Reserved, 0
3679 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3680 * 03 BCR Bit Clock Rate, 1=16x
3681 * 02..00 CM[2..0] Clock Mode, 111=BRG
3685 write_reg(info
, CHA
+ CCR1
, 0x1f);
3689 * 07..06 BGR[9..8] Baud rate bits 9..8
3690 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3691 * 04 SSEL Clock source select, 1=submode b
3692 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3693 * 02 RWX Read/Write Exchange 0=disabled
3695 * 00 DIV, data inversion 0=disabled, 1=enabled
3699 write_reg(info
, CHA
+ CCR2
, 0x10);
3703 * 07..01 Reserved, 0
3704 * 00 PSD DPLL Phase Shift Disable
3708 write_reg(info
, CHA
+ CCR3
, 0);
3712 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3713 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3714 * 05 TST1 Test Pin, 0=normal operation
3715 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3716 * 03..00 Reserved, must be 0
3720 write_reg(info
, CHA
+ CCR4
, 0x50);
3721 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3726 * 06 XBRK transmit break, 0=normal operation
3727 * 05 Stop bits (0=1, 1=2)
3728 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3729 * 02 PAREN Parity Enable
3730 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3734 if (info
->params
.data_bits
!= 8)
3735 val
|= BIT0
; /* 7 bits */
3736 if (info
->params
.stop_bits
!= 1)
3738 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3740 val
|= BIT2
; /* Parity enable */
3741 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3746 write_reg(info
, CHA
+ DAFO
, val
);
3748 /* RFC Rx FIFO Control
3751 * 06 DPS, 1=parity bit not stored in data byte
3752 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3753 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3754 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3756 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3760 write_reg(info
, CHA
+ RFC
, 0x5c);
3762 /* RLCR Receive length check register
3764 * Max frame length = (RL + 1) * 32
3766 write_reg(info
, CHA
+ RLCR
, 0);
3768 /* XBCH Transmit Byte Count High
3770 * 07 DMA mode, 0 = interrupt driven
3771 * 06 NRM, 0=ABM (ignored)
3772 * 05 CAS Carrier Auto Start
3773 * 04 XC Transmit Continuously (ignored)
3774 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3779 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3781 write_reg(info
, CHA
+ XBCH
, val
);
3782 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3783 irq_enable(info
, CHA
, IRQ_CTS
);
3785 /* MODE:03 RAC Receiver Active, 1=active */
3786 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3787 enable_auxclk(info
);
3788 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3789 irq_enable(info
, CHB
, IRQ_CTS
);
3790 /* PVR[3] 1=AUTO CTS active */
3791 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3793 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3794 irq_enable(info
, CHA
,
3795 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3796 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3797 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3798 wait_command_complete(info
, CHA
);
3799 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3802 /* Set the HDLC idle mode for the transmitter.
3804 static void tx_set_idle(MGSLPC_INFO
*info
)
3806 /* Note: ESCC2 only supports flags and one idle modes */
3807 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3808 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3810 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3813 /* get state of the V24 status (input) signals.
3815 static void get_signals(MGSLPC_INFO
*info
)
3817 unsigned char status
= 0;
3819 /* preserve DTR and RTS */
3820 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3822 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3823 info
->serial_signals
|= SerialSignal_DCD
;
3824 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3825 info
->serial_signals
|= SerialSignal_CTS
;
3827 status
= read_reg(info
, CHA
+ PVR
);
3828 if (!(status
& PVR_RI
))
3829 info
->serial_signals
|= SerialSignal_RI
;
3830 if (!(status
& PVR_DSR
))
3831 info
->serial_signals
|= SerialSignal_DSR
;
3834 /* Set the state of DTR and RTS based on contents of
3835 * serial_signals member of device extension.
3837 static void set_signals(MGSLPC_INFO
*info
)
3841 val
= read_reg(info
, CHA
+ MODE
);
3842 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3843 if (info
->serial_signals
& SerialSignal_RTS
)
3848 if (info
->serial_signals
& SerialSignal_RTS
)
3853 write_reg(info
, CHA
+ MODE
, val
);
3855 if (info
->serial_signals
& SerialSignal_DTR
)
3856 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3858 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3861 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3868 info
->rx_frame_count
= 0;
3869 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3870 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3871 buf
->status
= buf
->count
= 0;
3875 /* Attempt to return a received HDLC frame
3876 * Only frames received without errors are returned.
3878 * Returns 1 if frame returned, otherwise 0
3880 static int rx_get_frame(MGSLPC_INFO
*info
)
3882 unsigned short status
;
3884 unsigned int framesize
= 0;
3885 unsigned long flags
;
3886 struct tty_struct
*tty
= info
->tty
;
3887 int return_frame
= 0;
3889 if (info
->rx_frame_count
== 0)
3892 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3894 status
= buf
->status
;
3896 /* 07 VFR 1=valid frame
3897 * 06 RDO 1=data overrun
3898 * 05 CRC 1=OK, 0=error
3899 * 04 RAB 1=frame aborted
3901 if ((status
& 0xf0) != 0xA0) {
3902 if (!(status
& BIT7
) || (status
& BIT4
))
3903 info
->icount
.rxabort
++;
3904 else if (status
& BIT6
)
3905 info
->icount
.rxover
++;
3906 else if (!(status
& BIT5
)) {
3907 info
->icount
.rxcrc
++;
3908 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3914 struct net_device_stats
*stats
= hdlc_stats(info
->netdev
);
3916 stats
->rx_frame_errors
++;
3923 framesize
= buf
->count
;
3925 if (debug_level
>= DEBUG_LEVEL_BH
)
3926 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3927 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
3929 if (debug_level
>= DEBUG_LEVEL_DATA
)
3930 trace_block(info
, buf
->data
, framesize
, 0);
3933 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3934 framesize
+1 > info
->max_frame_size
) ||
3935 framesize
> info
->max_frame_size
)
3936 info
->icount
.rxlong
++;
3939 info
->icount
.rxok
++;
3941 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3942 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3948 hdlcdev_rx(info
, buf
->data
, framesize
);
3951 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3955 spin_lock_irqsave(&info
->lock
,flags
);
3956 buf
->status
= buf
->count
= 0;
3957 info
->rx_frame_count
--;
3959 if (info
->rx_get
>= info
->rx_buf_count
)
3961 spin_unlock_irqrestore(&info
->lock
,flags
);
3966 static BOOLEAN
register_test(MGSLPC_INFO
*info
)
3968 static unsigned char patterns
[] =
3969 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3970 static unsigned int count
= ARRAY_SIZE(patterns
);
3973 unsigned long flags
;
3975 spin_lock_irqsave(&info
->lock
,flags
);
3978 for (i
= 0; i
< count
; i
++) {
3979 write_reg(info
, XAD1
, patterns
[i
]);
3980 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3981 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3982 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3988 spin_unlock_irqrestore(&info
->lock
,flags
);
3992 static BOOLEAN
irq_test(MGSLPC_INFO
*info
)
3994 unsigned long end_time
;
3995 unsigned long flags
;
3997 spin_lock_irqsave(&info
->lock
,flags
);
4000 info
->testing_irq
= TRUE
;
4003 info
->irq_occurred
= FALSE
;
4005 /* init hdlc mode */
4007 irq_enable(info
, CHA
, IRQ_TIMER
);
4008 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
4009 issue_command(info
, CHA
, CMD_START_TIMER
);
4011 spin_unlock_irqrestore(&info
->lock
,flags
);
4014 while(end_time
-- && !info
->irq_occurred
) {
4015 msleep_interruptible(10);
4018 info
->testing_irq
= FALSE
;
4020 spin_lock_irqsave(&info
->lock
,flags
);
4022 spin_unlock_irqrestore(&info
->lock
,flags
);
4024 return info
->irq_occurred
? TRUE
: FALSE
;
4027 static int adapter_test(MGSLPC_INFO
*info
)
4029 if (!register_test(info
)) {
4030 info
->init_error
= DiagStatus_AddressFailure
;
4031 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4032 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
4036 if (!irq_test(info
)) {
4037 info
->init_error
= DiagStatus_IrqFailure
;
4038 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4039 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
4043 if (debug_level
>= DEBUG_LEVEL_INFO
)
4044 printk("%s(%d):device %s passed diagnostics\n",
4045 __FILE__
,__LINE__
,info
->device_name
);
4049 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
4054 printk("%s tx data:\n",info
->device_name
);
4056 printk("%s rx data:\n",info
->device_name
);
4064 for(i
=0;i
<linecount
;i
++)
4065 printk("%02X ",(unsigned char)data
[i
]);
4068 for(i
=0;i
<linecount
;i
++) {
4069 if (data
[i
]>=040 && data
[i
]<=0176)
4070 printk("%c",data
[i
]);
4081 /* HDLC frame time out
4082 * update stats and do tx completion processing
4084 static void tx_timeout(unsigned long context
)
4086 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
4087 unsigned long flags
;
4089 if ( debug_level
>= DEBUG_LEVEL_INFO
)
4090 printk( "%s(%d):tx_timeout(%s)\n",
4091 __FILE__
,__LINE__
,info
->device_name
);
4092 if(info
->tx_active
&&
4093 info
->params
.mode
== MGSL_MODE_HDLC
) {
4094 info
->icount
.txtimeout
++;
4096 spin_lock_irqsave(&info
->lock
,flags
);
4097 info
->tx_active
= 0;
4098 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
4100 spin_unlock_irqrestore(&info
->lock
,flags
);
4104 hdlcdev_tx_done(info
);
4113 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4114 * set encoding and frame check sequence (FCS) options
4116 * dev pointer to network device structure
4117 * encoding serial encoding setting
4118 * parity FCS setting
4120 * returns 0 if success, otherwise error code
4122 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
4123 unsigned short parity
)
4125 MGSLPC_INFO
*info
= dev_to_port(dev
);
4126 unsigned char new_encoding
;
4127 unsigned short new_crctype
;
4129 /* return error if TTY interface open */
4135 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
4136 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
4137 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
4138 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
4139 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
4140 default: return -EINVAL
;
4145 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
4146 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
4147 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
4148 default: return -EINVAL
;
4151 info
->params
.encoding
= new_encoding
;
4152 info
->params
.crc_type
= new_crctype
;
4154 /* if network interface up, reprogram hardware */
4156 mgslpc_program_hw(info
);
4162 * called by generic HDLC layer to send frame
4164 * skb socket buffer containing HDLC frame
4165 * dev pointer to network device structure
4167 * returns 0 if success, otherwise error code
4169 static int hdlcdev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4171 MGSLPC_INFO
*info
= dev_to_port(dev
);
4172 struct net_device_stats
*stats
= hdlc_stats(dev
);
4173 unsigned long flags
;
4175 if (debug_level
>= DEBUG_LEVEL_INFO
)
4176 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
4178 /* stop sending until this frame completes */
4179 netif_stop_queue(dev
);
4181 /* copy data to device buffers */
4182 memcpy(info
->tx_buf
, skb
->data
, skb
->len
);
4184 info
->tx_put
= info
->tx_count
= skb
->len
;
4186 /* update network statistics */
4187 stats
->tx_packets
++;
4188 stats
->tx_bytes
+= skb
->len
;
4190 /* done with socket buffer, so free it */
4193 /* save start time for transmit timeout detection */
4194 dev
->trans_start
= jiffies
;
4196 /* start hardware transmitter if necessary */
4197 spin_lock_irqsave(&info
->lock
,flags
);
4198 if (!info
->tx_active
)
4200 spin_unlock_irqrestore(&info
->lock
,flags
);
4206 * called by network layer when interface enabled
4207 * claim resources and initialize hardware
4209 * dev pointer to network device structure
4211 * returns 0 if success, otherwise error code
4213 static int hdlcdev_open(struct net_device
*dev
)
4215 MGSLPC_INFO
*info
= dev_to_port(dev
);
4217 unsigned long flags
;
4219 if (debug_level
>= DEBUG_LEVEL_INFO
)
4220 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
4222 /* generic HDLC layer open processing */
4223 if ((rc
= hdlc_open(dev
)))
4226 /* arbitrate between network and tty opens */
4227 spin_lock_irqsave(&info
->netlock
, flags
);
4228 if (info
->count
!= 0 || info
->netcount
!= 0) {
4229 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
4230 spin_unlock_irqrestore(&info
->netlock
, flags
);
4234 spin_unlock_irqrestore(&info
->netlock
, flags
);
4236 /* claim resources and init adapter */
4237 if ((rc
= startup(info
)) != 0) {
4238 spin_lock_irqsave(&info
->netlock
, flags
);
4240 spin_unlock_irqrestore(&info
->netlock
, flags
);
4244 /* assert DTR and RTS, apply hardware settings */
4245 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4246 mgslpc_program_hw(info
);
4248 /* enable network layer transmit */
4249 dev
->trans_start
= jiffies
;
4250 netif_start_queue(dev
);
4252 /* inform generic HDLC layer of current DCD status */
4253 spin_lock_irqsave(&info
->lock
, flags
);
4255 spin_unlock_irqrestore(&info
->lock
, flags
);
4256 if (info
->serial_signals
& SerialSignal_DCD
)
4257 netif_carrier_on(dev
);
4259 netif_carrier_off(dev
);
4264 * called by network layer when interface is disabled
4265 * shutdown hardware and release resources
4267 * dev pointer to network device structure
4269 * returns 0 if success, otherwise error code
4271 static int hdlcdev_close(struct net_device
*dev
)
4273 MGSLPC_INFO
*info
= dev_to_port(dev
);
4274 unsigned long flags
;
4276 if (debug_level
>= DEBUG_LEVEL_INFO
)
4277 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4279 netif_stop_queue(dev
);
4281 /* shutdown adapter and release resources */
4286 spin_lock_irqsave(&info
->netlock
, flags
);
4288 spin_unlock_irqrestore(&info
->netlock
, flags
);
4294 * called by network layer to process IOCTL call to network device
4296 * dev pointer to network device structure
4297 * ifr pointer to network interface request structure
4298 * cmd IOCTL command code
4300 * returns 0 if success, otherwise error code
4302 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4304 const size_t size
= sizeof(sync_serial_settings
);
4305 sync_serial_settings new_line
;
4306 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4307 MGSLPC_INFO
*info
= dev_to_port(dev
);
4310 if (debug_level
>= DEBUG_LEVEL_INFO
)
4311 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4313 /* return error if TTY interface open */
4317 if (cmd
!= SIOCWANDEV
)
4318 return hdlc_ioctl(dev
, ifr
, cmd
);
4320 switch(ifr
->ifr_settings
.type
) {
4321 case IF_GET_IFACE
: /* return current sync_serial_settings */
4323 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4324 if (ifr
->ifr_settings
.size
< size
) {
4325 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4329 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4330 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4331 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4332 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4335 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4336 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4337 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4338 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4339 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4342 new_line
.clock_rate
= info
->params
.clock_speed
;
4343 new_line
.loopback
= info
->params
.loopback
? 1:0;
4345 if (copy_to_user(line
, &new_line
, size
))
4349 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4351 if(!capable(CAP_NET_ADMIN
))
4353 if (copy_from_user(&new_line
, line
, size
))
4356 switch (new_line
.clock_type
)
4358 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4359 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4360 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4361 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4362 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4363 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4364 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4365 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4366 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4367 default: return -EINVAL
;
4370 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4373 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4374 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4375 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4376 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4377 info
->params
.flags
|= flags
;
4379 info
->params
.loopback
= new_line
.loopback
;
4381 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4382 info
->params
.clock_speed
= new_line
.clock_rate
;
4384 info
->params
.clock_speed
= 0;
4386 /* if network interface up, reprogram hardware */
4388 mgslpc_program_hw(info
);
4392 return hdlc_ioctl(dev
, ifr
, cmd
);
4397 * called by network layer when transmit timeout is detected
4399 * dev pointer to network device structure
4401 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4403 MGSLPC_INFO
*info
= dev_to_port(dev
);
4404 struct net_device_stats
*stats
= hdlc_stats(dev
);
4405 unsigned long flags
;
4407 if (debug_level
>= DEBUG_LEVEL_INFO
)
4408 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4411 stats
->tx_aborted_errors
++;
4413 spin_lock_irqsave(&info
->lock
,flags
);
4415 spin_unlock_irqrestore(&info
->lock
,flags
);
4417 netif_wake_queue(dev
);
4421 * called by device driver when transmit completes
4422 * reenable network layer transmit if stopped
4424 * info pointer to device instance information
4426 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4428 if (netif_queue_stopped(info
->netdev
))
4429 netif_wake_queue(info
->netdev
);
4433 * called by device driver when frame received
4434 * pass frame to network layer
4436 * info pointer to device instance information
4437 * buf pointer to buffer contianing frame data
4438 * size count of data bytes in buf
4440 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4442 struct sk_buff
*skb
= dev_alloc_skb(size
);
4443 struct net_device
*dev
= info
->netdev
;
4444 struct net_device_stats
*stats
= hdlc_stats(dev
);
4446 if (debug_level
>= DEBUG_LEVEL_INFO
)
4447 printk("hdlcdev_rx(%s)\n",dev
->name
);
4450 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4451 stats
->rx_dropped
++;
4455 memcpy(skb_put(skb
, size
),buf
,size
);
4457 skb
->protocol
= hdlc_type_trans(skb
, info
->netdev
);
4459 stats
->rx_packets
++;
4460 stats
->rx_bytes
+= size
;
4464 info
->netdev
->last_rx
= jiffies
;
4468 * called by device driver when adding device instance
4469 * do generic HDLC initialization
4471 * info pointer to device instance information
4473 * returns 0 if success, otherwise error code
4475 static int hdlcdev_init(MGSLPC_INFO
*info
)
4478 struct net_device
*dev
;
4481 /* allocate and initialize network and HDLC layer objects */
4483 if (!(dev
= alloc_hdlcdev(info
))) {
4484 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4488 /* for network layer reporting purposes only */
4489 dev
->base_addr
= info
->io_base
;
4490 dev
->irq
= info
->irq_level
;
4492 /* network layer callbacks and settings */
4493 dev
->do_ioctl
= hdlcdev_ioctl
;
4494 dev
->open
= hdlcdev_open
;
4495 dev
->stop
= hdlcdev_close
;
4496 dev
->tx_timeout
= hdlcdev_tx_timeout
;
4497 dev
->watchdog_timeo
= 10*HZ
;
4498 dev
->tx_queue_len
= 50;
4500 /* generic HDLC layer callbacks and settings */
4501 hdlc
= dev_to_hdlc(dev
);
4502 hdlc
->attach
= hdlcdev_attach
;
4503 hdlc
->xmit
= hdlcdev_xmit
;
4505 /* register objects with HDLC layer */
4506 if ((rc
= register_hdlc_device(dev
))) {
4507 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4517 * called by device driver when removing device instance
4518 * do generic HDLC cleanup
4520 * info pointer to device instance information
4522 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4524 unregister_hdlc_device(info
->netdev
);
4525 free_netdev(info
->netdev
);
4526 info
->netdev
= NULL
;
4529 #endif /* CONFIG_HDLC */