2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
6 * Device driver for Microgate SyncLink PC Card
7 * multiprotocol serial adapter.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * This code is released under the GNU General Public License (GPL)
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
31 # define BREAKPOINT() asm(" int $3");
33 # define BREAKPOINT() { }
36 #define MAX_DEVICE_COUNT 4
38 #include <linux/module.h>
39 #include <linux/errno.h>
40 #include <linux/signal.h>
41 #include <linux/sched.h>
42 #include <linux/timer.h>
43 #include <linux/time.h>
44 #include <linux/interrupt.h>
45 #include <linux/tty.h>
46 #include <linux/tty_flip.h>
47 #include <linux/serial.h>
48 #include <linux/major.h>
49 #include <linux/string.h>
50 #include <linux/fcntl.h>
51 #include <linux/ptrace.h>
52 #include <linux/ioport.h>
54 #include <linux/slab.h>
55 #include <linux/netdevice.h>
56 #include <linux/vmalloc.h>
57 #include <linux/init.h>
58 #include <linux/delay.h>
59 #include <linux/ioctl.h>
60 #include <linux/synclink.h>
62 #include <asm/system.h>
66 #include <linux/bitops.h>
67 #include <asm/types.h>
68 #include <linux/termios.h>
69 #include <linux/workqueue.h>
70 #include <linux/hdlc.h>
72 #include <pcmcia/cs_types.h>
73 #include <pcmcia/cs.h>
74 #include <pcmcia/cistpl.h>
75 #include <pcmcia/cisreg.h>
76 #include <pcmcia/ds.h>
78 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE))
79 #define SYNCLINK_GENERIC_HDLC 1
81 #define SYNCLINK_GENERIC_HDLC 0
84 #define GET_USER(error,value,addr) error = get_user(value,addr)
85 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
86 #define PUT_USER(error,value,addr) error = put_user(value,addr)
87 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
89 #include <asm/uaccess.h>
91 static MGSL_PARAMS default_params
= {
92 MGSL_MODE_HDLC
, /* unsigned long mode */
93 0, /* unsigned char loopback; */
94 HDLC_FLAG_UNDERRUN_ABORT15
, /* unsigned short flags; */
95 HDLC_ENCODING_NRZI_SPACE
, /* unsigned char encoding; */
96 0, /* unsigned long clock_speed; */
97 0xff, /* unsigned char addr_filter; */
98 HDLC_CRC_16_CCITT
, /* unsigned short crc_type; */
99 HDLC_PREAMBLE_LENGTH_8BITS
, /* unsigned char preamble_length; */
100 HDLC_PREAMBLE_PATTERN_NONE
, /* unsigned char preamble; */
101 9600, /* unsigned long data_rate; */
102 8, /* unsigned char data_bits; */
103 1, /* unsigned char stop_bits; */
104 ASYNC_PARITY_NONE
/* unsigned char parity; */
110 unsigned char status
;
114 /* The queue of BH actions to be performed */
117 #define BH_TRANSMIT 2
120 #define IO_PIN_SHUTDOWN_LIMIT 100
122 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
124 struct _input_signal_events
{
137 * Device instance data structure
140 typedef struct _mgslpc_info
{
141 void *if_ptr
; /* General purpose pointer (used by SPPP) */
144 int count
; /* count of opens */
146 unsigned short close_delay
;
147 unsigned short closing_wait
; /* time to wait before closing */
149 struct mgsl_icount icount
;
151 struct tty_struct
*tty
;
153 int x_char
; /* xon/xoff character */
154 int blocked_open
; /* # of blocked opens */
155 unsigned char read_status_mask
;
156 unsigned char ignore_status_mask
;
158 unsigned char *tx_buf
;
163 /* circular list of fixed length rx buffers */
165 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
166 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
167 int rx_put
; /* index of next empty rx buffer */
168 int rx_get
; /* index of next full rx buffer */
169 int rx_buf_size
; /* size in bytes of single rx buffer */
170 int rx_buf_count
; /* total number of rx buffers */
171 int rx_frame_count
; /* number of full rx buffers */
173 wait_queue_head_t open_wait
;
174 wait_queue_head_t close_wait
;
176 wait_queue_head_t status_event_wait_q
;
177 wait_queue_head_t event_wait_q
;
178 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
179 struct _mgslpc_info
*next_device
; /* device list link */
181 unsigned short imra_value
;
182 unsigned short imrb_value
;
183 unsigned char pim_value
;
186 struct work_struct task
; /* task structure for scheduling bh */
195 int dcd_chkcount
; /* check counts to prevent */
196 int cts_chkcount
; /* too many IRQs if a signal */
197 int dsr_chkcount
; /* is floating */
208 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
210 char device_name
[25]; /* device instance name */
212 unsigned int io_base
; /* base I/O address of adapter */
213 unsigned int irq_level
;
215 MGSL_PARAMS params
; /* communications parameters */
217 unsigned char serial_signals
; /* current serial signal states */
219 bool irq_occurred
; /* for diagnostics use */
221 unsigned int init_error
; /* startup error (DIAGS) */
223 char flag_buf
[MAX_ASYNC_BUFFER_SIZE
];
224 bool drop_rts_on_tx_done
;
226 struct _input_signal_events input_signal_events
;
229 struct pcmcia_device
*p_dev
;
233 /* SPPP/Cisco HDLC device parts */
238 #if SYNCLINK_GENERIC_HDLC
239 struct net_device
*netdev
;
244 #define MGSLPC_MAGIC 0x5402
247 * The size of the serial xmit buffer is 1 page, or 4096 bytes
249 #define TXBUFSIZE 4096
252 #define CHA 0x00 /* channel A offset */
253 #define CHB 0x40 /* channel B offset */
256 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
303 #define IRQ_BREAK_ON BIT15 // rx break detected
304 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
305 #define IRQ_ALLSENT BIT13 // all sent
306 #define IRQ_UNDERRUN BIT12 // transmit data underrun
307 #define IRQ_TIMER BIT11 // timer interrupt
308 #define IRQ_CTS BIT10 // CTS status change
309 #define IRQ_TXREPEAT BIT9 // tx message repeat
310 #define IRQ_TXFIFO BIT8 // transmit pool ready
311 #define IRQ_RXEOM BIT7 // receive message end
312 #define IRQ_EXITHUNT BIT6 // receive frame start
313 #define IRQ_RXTIME BIT6 // rx char timeout
314 #define IRQ_DCD BIT2 // carrier detect status change
315 #define IRQ_OVERRUN BIT1 // receive frame overflow
316 #define IRQ_RXFIFO BIT0 // receive pool full
320 #define XFW BIT6 // transmit FIFO write enable
321 #define CEC BIT2 // command executing
322 #define CTS BIT1 // CTS state
327 #define PVR_AUTOCTS BIT3
328 #define PVR_RS232 0x20 /* 0010b */
329 #define PVR_V35 0xe0 /* 1110b */
330 #define PVR_RS422 0x40 /* 0100b */
332 /* Register access functions */
334 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
335 #define read_reg(info, reg) inb((info)->io_base + (reg))
337 #define read_reg16(info, reg) inw((info)->io_base + (reg))
338 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
340 #define set_reg_bits(info, reg, mask) \
341 write_reg(info, (reg), \
342 (unsigned char) (read_reg(info, (reg)) | (mask)))
343 #define clear_reg_bits(info, reg, mask) \
344 write_reg(info, (reg), \
345 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
347 * interrupt enable/disable routines
349 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
351 if (channel
== CHA
) {
352 info
->imra_value
|= mask
;
353 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
355 info
->imrb_value
|= mask
;
356 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
359 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
361 if (channel
== CHA
) {
362 info
->imra_value
&= ~mask
;
363 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
365 info
->imrb_value
&= ~mask
;
366 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
370 #define port_irq_disable(info, mask) \
371 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
373 #define port_irq_enable(info, mask) \
374 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
376 static void rx_start(MGSLPC_INFO
*info
);
377 static void rx_stop(MGSLPC_INFO
*info
);
379 static void tx_start(MGSLPC_INFO
*info
);
380 static void tx_stop(MGSLPC_INFO
*info
);
381 static void tx_set_idle(MGSLPC_INFO
*info
);
383 static void get_signals(MGSLPC_INFO
*info
);
384 static void set_signals(MGSLPC_INFO
*info
);
386 static void reset_device(MGSLPC_INFO
*info
);
388 static void hdlc_mode(MGSLPC_INFO
*info
);
389 static void async_mode(MGSLPC_INFO
*info
);
391 static void tx_timeout(unsigned long context
);
393 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
);
395 #if SYNCLINK_GENERIC_HDLC
396 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
397 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
398 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
399 static int hdlcdev_init(MGSLPC_INFO
*info
);
400 static void hdlcdev_exit(MGSLPC_INFO
*info
);
403 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
405 static bool register_test(MGSLPC_INFO
*info
);
406 static bool irq_test(MGSLPC_INFO
*info
);
407 static int adapter_test(MGSLPC_INFO
*info
);
409 static int claim_resources(MGSLPC_INFO
*info
);
410 static void release_resources(MGSLPC_INFO
*info
);
411 static void mgslpc_add_device(MGSLPC_INFO
*info
);
412 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
414 static bool rx_get_frame(MGSLPC_INFO
*info
);
415 static void rx_reset_buffers(MGSLPC_INFO
*info
);
416 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
417 static void rx_free_buffers(MGSLPC_INFO
*info
);
419 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
);
422 * Bottom half interrupt handlers
424 static void bh_handler(struct work_struct
*work
);
425 static void bh_transmit(MGSLPC_INFO
*info
);
426 static void bh_status(MGSLPC_INFO
*info
);
431 static int tiocmget(struct tty_struct
*tty
, struct file
*file
);
432 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
433 unsigned int set
, unsigned int clear
);
434 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
435 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
436 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
);
437 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
438 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
439 static int set_txenable(MGSLPC_INFO
*info
, int enable
);
440 static int tx_abort(MGSLPC_INFO
*info
);
441 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
442 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
444 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
445 static int mgslpc_device_count
= 0;
448 * Set this param to non-zero to load eax with the
449 * .text section address and breakpoint on module load.
450 * This is useful for use with gdb and add-symbol-file command.
452 static int break_on_load
=0;
455 * Driver major number, defaults to zero to get auto
456 * assigned major number. May be forced as module parameter.
458 static int ttymajor
=0;
460 static int debug_level
= 0;
461 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
462 static int dosyncppp
[MAX_DEVICE_COUNT
] = {1,1,1,1};
464 module_param(break_on_load
, bool, 0);
465 module_param(ttymajor
, int, 0);
466 module_param(debug_level
, int, 0);
467 module_param_array(maxframe
, int, NULL
, 0);
468 module_param_array(dosyncppp
, int, NULL
, 0);
470 MODULE_LICENSE("GPL");
472 static char *driver_name
= "SyncLink PC Card driver";
473 static char *driver_version
= "$Revision: 4.34 $";
475 static struct tty_driver
*serial_driver
;
477 /* number of characters left in xmit buffer before we ask for more */
478 #define WAKEUP_CHARS 256
480 static void mgslpc_change_params(MGSLPC_INFO
*info
);
481 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
483 /* PCMCIA prototypes */
485 static int mgslpc_config(struct pcmcia_device
*link
);
486 static void mgslpc_release(u_long arg
);
487 static void mgslpc_detach(struct pcmcia_device
*p_dev
);
490 * 1st function defined in .text section. Calling this function in
491 * init_module() followed by a breakpoint allows a remote debugger
492 * (gdb) to get the .text address for the add-symbol-file command.
493 * This allows remote debugging of dynamically loadable modules.
495 static void* mgslpc_get_text_ptr(void)
497 return mgslpc_get_text_ptr
;
501 * line discipline callback wrappers
503 * The wrappers maintain line discipline references
504 * while calling into the line discipline.
506 * ldisc_receive_buf - pass receive data to line discipline
509 static void ldisc_receive_buf(struct tty_struct
*tty
,
510 const __u8
*data
, char *flags
, int count
)
512 struct tty_ldisc
*ld
;
515 ld
= tty_ldisc_ref(tty
);
518 ld
->receive_buf(tty
, data
, flags
, count
);
523 static int mgslpc_probe(struct pcmcia_device
*link
)
528 if (debug_level
>= DEBUG_LEVEL_INFO
)
529 printk("mgslpc_attach\n");
531 info
= kzalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
533 printk("Error can't allocate device instance data\n");
537 info
->magic
= MGSLPC_MAGIC
;
538 INIT_WORK(&info
->task
, bh_handler
);
539 info
->max_frame_size
= 4096;
540 info
->close_delay
= 5*HZ
/10;
541 info
->closing_wait
= 30*HZ
;
542 init_waitqueue_head(&info
->open_wait
);
543 init_waitqueue_head(&info
->close_wait
);
544 init_waitqueue_head(&info
->status_event_wait_q
);
545 init_waitqueue_head(&info
->event_wait_q
);
546 spin_lock_init(&info
->lock
);
547 spin_lock_init(&info
->netlock
);
548 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
549 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
550 info
->imra_value
= 0xffff;
551 info
->imrb_value
= 0xffff;
552 info
->pim_value
= 0xff;
557 /* Initialize the struct pcmcia_device structure */
559 /* Interrupt setup */
560 link
->irq
.Attributes
= IRQ_TYPE_EXCLUSIVE
;
561 link
->irq
.IRQInfo1
= IRQ_LEVEL_ID
;
562 link
->irq
.Handler
= NULL
;
564 link
->conf
.Attributes
= 0;
565 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
567 ret
= mgslpc_config(link
);
571 mgslpc_add_device(info
);
576 /* Card has been inserted.
579 #define CS_CHECK(fn, ret) \
580 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
582 static int mgslpc_config(struct pcmcia_device
*link
)
584 MGSLPC_INFO
*info
= link
->priv
;
587 int last_fn
, last_ret
;
589 cistpl_cftable_entry_t dflt
= { 0 };
590 cistpl_cftable_entry_t
*cfg
;
592 if (debug_level
>= DEBUG_LEVEL_INFO
)
593 printk("mgslpc_config(0x%p)\n", link
);
595 tuple
.Attributes
= 0;
596 tuple
.TupleData
= buf
;
597 tuple
.TupleDataMax
= sizeof(buf
);
598 tuple
.TupleOffset
= 0;
600 /* get CIS configuration entry */
602 tuple
.DesiredTuple
= CISTPL_CFTABLE_ENTRY
;
603 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(link
, &tuple
));
605 cfg
= &(parse
.cftable_entry
);
606 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(link
, &tuple
));
607 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(link
, &tuple
, &parse
));
609 if (cfg
->flags
& CISTPL_CFTABLE_DEFAULT
) dflt
= *cfg
;
613 link
->conf
.ConfigIndex
= cfg
->index
;
614 link
->conf
.Attributes
|= CONF_ENABLE_IRQ
;
616 /* IO window settings */
617 link
->io
.NumPorts1
= 0;
618 if ((cfg
->io
.nwin
> 0) || (dflt
.io
.nwin
> 0)) {
619 cistpl_io_t
*io
= (cfg
->io
.nwin
) ? &cfg
->io
: &dflt
.io
;
620 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_AUTO
;
621 if (!(io
->flags
& CISTPL_IO_8BIT
))
622 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_16
;
623 if (!(io
->flags
& CISTPL_IO_16BIT
))
624 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_8
;
625 link
->io
.IOAddrLines
= io
->flags
& CISTPL_IO_LINES_MASK
;
626 link
->io
.BasePort1
= io
->win
[0].base
;
627 link
->io
.NumPorts1
= io
->win
[0].len
;
628 CS_CHECK(RequestIO
, pcmcia_request_io(link
, &link
->io
));
631 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
632 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
633 link
->conf
.ConfigIndex
= 8;
634 link
->conf
.Present
= PRESENT_OPTION
;
636 link
->irq
.Attributes
|= IRQ_HANDLE_PRESENT
;
637 link
->irq
.Handler
= mgslpc_isr
;
638 link
->irq
.Instance
= info
;
639 CS_CHECK(RequestIRQ
, pcmcia_request_irq(link
, &link
->irq
));
641 CS_CHECK(RequestConfiguration
, pcmcia_request_configuration(link
, &link
->conf
));
643 info
->io_base
= link
->io
.BasePort1
;
644 info
->irq_level
= link
->irq
.AssignedIRQ
;
646 /* add to linked list of devices */
647 sprintf(info
->node
.dev_name
, "mgslpc0");
648 info
->node
.major
= info
->node
.minor
= 0;
649 link
->dev_node
= &info
->node
;
651 printk(KERN_INFO
"%s: index 0x%02x:",
652 info
->node
.dev_name
, link
->conf
.ConfigIndex
);
653 if (link
->conf
.Attributes
& CONF_ENABLE_IRQ
)
654 printk(", irq %d", link
->irq
.AssignedIRQ
);
655 if (link
->io
.NumPorts1
)
656 printk(", io 0x%04x-0x%04x", link
->io
.BasePort1
,
657 link
->io
.BasePort1
+link
->io
.NumPorts1
-1);
662 cs_error(link
, last_fn
, last_ret
);
663 mgslpc_release((u_long
)link
);
667 /* Card has been removed.
668 * Unregister device and release PCMCIA configuration.
669 * If device is open, postpone until it is closed.
671 static void mgslpc_release(u_long arg
)
673 struct pcmcia_device
*link
= (struct pcmcia_device
*)arg
;
675 if (debug_level
>= DEBUG_LEVEL_INFO
)
676 printk("mgslpc_release(0x%p)\n", link
);
678 pcmcia_disable_device(link
);
681 static void mgslpc_detach(struct pcmcia_device
*link
)
683 if (debug_level
>= DEBUG_LEVEL_INFO
)
684 printk("mgslpc_detach(0x%p)\n", link
);
686 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
687 mgslpc_release((u_long
)link
);
689 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
692 static int mgslpc_suspend(struct pcmcia_device
*link
)
694 MGSLPC_INFO
*info
= link
->priv
;
701 static int mgslpc_resume(struct pcmcia_device
*link
)
703 MGSLPC_INFO
*info
= link
->priv
;
711 static inline bool mgslpc_paranoia_check(MGSLPC_INFO
*info
,
712 char *name
, const char *routine
)
714 #ifdef MGSLPC_PARANOIA_CHECK
715 static const char *badmagic
=
716 "Warning: bad magic number for mgsl struct (%s) in %s\n";
717 static const char *badinfo
=
718 "Warning: null mgslpc_info for (%s) in %s\n";
721 printk(badinfo
, name
, routine
);
724 if (info
->magic
!= MGSLPC_MAGIC
) {
725 printk(badmagic
, name
, routine
);
736 #define CMD_RXFIFO BIT7 // release current rx FIFO
737 #define CMD_RXRESET BIT6 // receiver reset
738 #define CMD_RXFIFO_READ BIT5
739 #define CMD_START_TIMER BIT4
740 #define CMD_TXFIFO BIT3 // release current tx FIFO
741 #define CMD_TXEOM BIT1 // transmit end message
742 #define CMD_TXRESET BIT0 // transmit reset
744 static bool wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
747 /* wait for command completion */
748 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
756 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
758 wait_command_complete(info
, channel
);
759 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
762 static void tx_pause(struct tty_struct
*tty
)
764 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
767 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
769 if (debug_level
>= DEBUG_LEVEL_INFO
)
770 printk("tx_pause(%s)\n",info
->device_name
);
772 spin_lock_irqsave(&info
->lock
,flags
);
773 if (info
->tx_enabled
)
775 spin_unlock_irqrestore(&info
->lock
,flags
);
778 static void tx_release(struct tty_struct
*tty
)
780 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
783 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
785 if (debug_level
>= DEBUG_LEVEL_INFO
)
786 printk("tx_release(%s)\n",info
->device_name
);
788 spin_lock_irqsave(&info
->lock
,flags
);
789 if (!info
->tx_enabled
)
791 spin_unlock_irqrestore(&info
->lock
,flags
);
794 /* Return next bottom half action to perform.
795 * or 0 if nothing to do.
797 static int bh_action(MGSLPC_INFO
*info
)
802 spin_lock_irqsave(&info
->lock
,flags
);
804 if (info
->pending_bh
& BH_RECEIVE
) {
805 info
->pending_bh
&= ~BH_RECEIVE
;
807 } else if (info
->pending_bh
& BH_TRANSMIT
) {
808 info
->pending_bh
&= ~BH_TRANSMIT
;
810 } else if (info
->pending_bh
& BH_STATUS
) {
811 info
->pending_bh
&= ~BH_STATUS
;
816 /* Mark BH routine as complete */
817 info
->bh_running
= false;
818 info
->bh_requested
= false;
821 spin_unlock_irqrestore(&info
->lock
,flags
);
826 static void bh_handler(struct work_struct
*work
)
828 MGSLPC_INFO
*info
= container_of(work
, MGSLPC_INFO
, task
);
834 if (debug_level
>= DEBUG_LEVEL_BH
)
835 printk( "%s(%d):bh_handler(%s) entry\n",
836 __FILE__
,__LINE__
,info
->device_name
);
838 info
->bh_running
= true;
840 while((action
= bh_action(info
)) != 0) {
842 /* Process work item */
843 if ( debug_level
>= DEBUG_LEVEL_BH
)
844 printk( "%s(%d):bh_handler() work item action=%d\n",
845 __FILE__
,__LINE__
,action
);
850 while(rx_get_frame(info
));
859 /* unknown work item ID */
860 printk("Unknown work item ID=%08X!\n", action
);
865 if (debug_level
>= DEBUG_LEVEL_BH
)
866 printk( "%s(%d):bh_handler(%s) exit\n",
867 __FILE__
,__LINE__
,info
->device_name
);
870 static void bh_transmit(MGSLPC_INFO
*info
)
872 struct tty_struct
*tty
= info
->tty
;
873 if (debug_level
>= DEBUG_LEVEL_BH
)
874 printk("bh_transmit() entry on %s\n", info
->device_name
);
880 static void bh_status(MGSLPC_INFO
*info
)
882 info
->ri_chkcount
= 0;
883 info
->dsr_chkcount
= 0;
884 info
->dcd_chkcount
= 0;
885 info
->cts_chkcount
= 0;
888 /* eom: non-zero = end of frame */
889 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
891 unsigned char data
[2];
892 unsigned char fifo_count
, read_count
, i
;
893 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
895 if (debug_level
>= DEBUG_LEVEL_ISR
)
896 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__
,__LINE__
,eom
);
898 if (!info
->rx_enabled
)
901 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
902 /* no more free buffers */
903 issue_command(info
, CHA
, CMD_RXRESET
);
904 info
->pending_bh
|= BH_RECEIVE
;
905 info
->rx_overflow
= true;
906 info
->icount
.buf_overrun
++;
911 /* end of frame, get FIFO count from RBCL register */
912 if (!(fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f)))
918 if (fifo_count
== 1) {
920 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
923 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
925 fifo_count
-= read_count
;
926 if (!fifo_count
&& eom
)
927 buf
->status
= data
[--read_count
];
929 for (i
= 0; i
< read_count
; i
++) {
930 if (buf
->count
>= info
->max_frame_size
) {
931 /* frame too large, reset receiver and reset current buffer */
932 issue_command(info
, CHA
, CMD_RXRESET
);
936 *(buf
->data
+ buf
->count
) = data
[i
];
939 } while (fifo_count
);
942 info
->pending_bh
|= BH_RECEIVE
;
943 info
->rx_frame_count
++;
945 if (info
->rx_put
>= info
->rx_buf_count
)
948 issue_command(info
, CHA
, CMD_RXFIFO
);
951 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
)
953 unsigned char data
, status
, flag
;
956 struct tty_struct
*tty
= info
->tty
;
957 struct mgsl_icount
*icount
= &info
->icount
;
960 /* early termination, get FIFO count from RBCL register */
961 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
963 /* Zero fifo count could mean 0 or 32 bytes available.
964 * If BIT5 of STAR is set then at least 1 byte is available.
966 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
971 tty_buffer_request_room(tty
, fifo_count
);
972 /* Flush received async data to receive data buffer. */
974 data
= read_reg(info
, CHA
+ RXFIFO
);
975 status
= read_reg(info
, CHA
+ RXFIFO
);
981 // if no frameing/crc error then save data
983 // BIT6:framing error
985 if (status
& (BIT7
+ BIT6
)) {
991 /* discard char if tty control flags say so */
992 if (status
& info
->ignore_status_mask
)
995 status
&= info
->read_status_mask
;
999 else if (status
& BIT6
)
1002 work
+= tty_insert_flip_char(tty
, data
, flag
);
1004 issue_command(info
, CHA
, CMD_RXFIFO
);
1006 if (debug_level
>= DEBUG_LEVEL_ISR
) {
1007 printk("%s(%d):rx_ready_async",
1009 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1010 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
1011 icount
->parity
,icount
->frame
,icount
->overrun
);
1015 tty_flip_buffer_push(tty
);
1019 static void tx_done(MGSLPC_INFO
*info
)
1021 if (!info
->tx_active
)
1024 info
->tx_active
= false;
1025 info
->tx_aborting
= false;
1027 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
1030 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1031 del_timer(&info
->tx_timer
);
1033 if (info
->drop_rts_on_tx_done
) {
1035 if (info
->serial_signals
& SerialSignal_RTS
) {
1036 info
->serial_signals
&= ~SerialSignal_RTS
;
1039 info
->drop_rts_on_tx_done
= false;
1042 #if SYNCLINK_GENERIC_HDLC
1044 hdlcdev_tx_done(info
);
1048 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1052 info
->pending_bh
|= BH_TRANSMIT
;
1056 static void tx_ready(MGSLPC_INFO
*info
)
1058 unsigned char fifo_count
= 32;
1061 if (debug_level
>= DEBUG_LEVEL_ISR
)
1062 printk("%s(%d):tx_ready(%s)\n", __FILE__
,__LINE__
,info
->device_name
);
1064 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1065 if (!info
->tx_active
)
1068 if (info
->tty
->stopped
|| info
->tty
->hw_stopped
) {
1072 if (!info
->tx_count
)
1073 info
->tx_active
= false;
1076 if (!info
->tx_count
)
1079 while (info
->tx_count
&& fifo_count
) {
1080 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1083 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1085 write_reg16(info
, CHA
+ TXFIFO
,
1086 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1088 info
->tx_count
-= c
;
1089 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1093 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1094 if (info
->tx_count
< WAKEUP_CHARS
)
1095 info
->pending_bh
|= BH_TRANSMIT
;
1096 issue_command(info
, CHA
, CMD_TXFIFO
);
1099 issue_command(info
, CHA
, CMD_TXFIFO
);
1101 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1105 static void cts_change(MGSLPC_INFO
*info
)
1108 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1109 irq_disable(info
, CHB
, IRQ_CTS
);
1111 if (info
->serial_signals
& SerialSignal_CTS
)
1112 info
->input_signal_events
.cts_up
++;
1114 info
->input_signal_events
.cts_down
++;
1115 wake_up_interruptible(&info
->status_event_wait_q
);
1116 wake_up_interruptible(&info
->event_wait_q
);
1118 if (info
->flags
& ASYNC_CTS_FLOW
) {
1119 if (info
->tty
->hw_stopped
) {
1120 if (info
->serial_signals
& SerialSignal_CTS
) {
1121 if (debug_level
>= DEBUG_LEVEL_ISR
)
1122 printk("CTS tx start...");
1124 info
->tty
->hw_stopped
= 0;
1126 info
->pending_bh
|= BH_TRANSMIT
;
1130 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1131 if (debug_level
>= DEBUG_LEVEL_ISR
)
1132 printk("CTS tx stop...");
1134 info
->tty
->hw_stopped
= 1;
1139 info
->pending_bh
|= BH_STATUS
;
1142 static void dcd_change(MGSLPC_INFO
*info
)
1145 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1146 irq_disable(info
, CHB
, IRQ_DCD
);
1148 if (info
->serial_signals
& SerialSignal_DCD
) {
1149 info
->input_signal_events
.dcd_up
++;
1152 info
->input_signal_events
.dcd_down
++;
1153 #if SYNCLINK_GENERIC_HDLC
1154 if (info
->netcount
) {
1155 if (info
->serial_signals
& SerialSignal_DCD
)
1156 netif_carrier_on(info
->netdev
);
1158 netif_carrier_off(info
->netdev
);
1161 wake_up_interruptible(&info
->status_event_wait_q
);
1162 wake_up_interruptible(&info
->event_wait_q
);
1164 if (info
->flags
& ASYNC_CHECK_CD
) {
1165 if (debug_level
>= DEBUG_LEVEL_ISR
)
1166 printk("%s CD now %s...", info
->device_name
,
1167 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1168 if (info
->serial_signals
& SerialSignal_DCD
)
1169 wake_up_interruptible(&info
->open_wait
);
1171 if (debug_level
>= DEBUG_LEVEL_ISR
)
1172 printk("doing serial hangup...");
1174 tty_hangup(info
->tty
);
1177 info
->pending_bh
|= BH_STATUS
;
1180 static void dsr_change(MGSLPC_INFO
*info
)
1183 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1184 port_irq_disable(info
, PVR_DSR
);
1186 if (info
->serial_signals
& SerialSignal_DSR
)
1187 info
->input_signal_events
.dsr_up
++;
1189 info
->input_signal_events
.dsr_down
++;
1190 wake_up_interruptible(&info
->status_event_wait_q
);
1191 wake_up_interruptible(&info
->event_wait_q
);
1192 info
->pending_bh
|= BH_STATUS
;
1195 static void ri_change(MGSLPC_INFO
*info
)
1198 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1199 port_irq_disable(info
, PVR_RI
);
1201 if (info
->serial_signals
& SerialSignal_RI
)
1202 info
->input_signal_events
.ri_up
++;
1204 info
->input_signal_events
.ri_down
++;
1205 wake_up_interruptible(&info
->status_event_wait_q
);
1206 wake_up_interruptible(&info
->event_wait_q
);
1207 info
->pending_bh
|= BH_STATUS
;
1210 /* Interrupt service routine entry point.
1214 * irq interrupt number that caused interrupt
1215 * dev_id device ID supplied during interrupt registration
1217 static irqreturn_t
mgslpc_isr(int dummy
, void *dev_id
)
1219 MGSLPC_INFO
*info
= dev_id
;
1221 unsigned char gis
, pis
;
1224 if (debug_level
>= DEBUG_LEVEL_ISR
)
1225 printk("mgslpc_isr(%d) entry.\n", info
->irq_level
);
1227 if (!(info
->p_dev
->_locked
))
1230 spin_lock(&info
->lock
);
1232 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1233 if (debug_level
>= DEBUG_LEVEL_ISR
)
1234 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1236 if ((gis
& 0x70) || count
> 1000) {
1237 printk("synclink_cs:hardware failed or ejected\n");
1242 if (gis
& (BIT1
+ BIT0
)) {
1243 isr
= read_reg16(info
, CHB
+ ISR
);
1249 if (gis
& (BIT3
+ BIT2
))
1251 isr
= read_reg16(info
, CHA
+ ISR
);
1252 if (isr
& IRQ_TIMER
) {
1253 info
->irq_occurred
= true;
1254 irq_disable(info
, CHA
, IRQ_TIMER
);
1258 if (isr
& IRQ_EXITHUNT
) {
1259 info
->icount
.exithunt
++;
1260 wake_up_interruptible(&info
->event_wait_q
);
1262 if (isr
& IRQ_BREAK_ON
) {
1264 if (info
->flags
& ASYNC_SAK
)
1267 if (isr
& IRQ_RXTIME
) {
1268 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1270 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1271 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1272 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1274 rx_ready_async(info
, isr
& IRQ_RXEOM
);
1278 if (isr
& IRQ_UNDERRUN
) {
1279 if (info
->tx_aborting
)
1280 info
->icount
.txabort
++;
1282 info
->icount
.txunder
++;
1285 else if (isr
& IRQ_ALLSENT
) {
1286 info
->icount
.txok
++;
1289 else if (isr
& IRQ_TXFIFO
)
1293 pis
= read_reg(info
, CHA
+ PIS
);
1301 /* Request bottom half processing if there's something
1302 * for it to do and the bh is not already running
1305 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1306 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1307 printk("%s(%d):%s queueing bh task.\n",
1308 __FILE__
,__LINE__
,info
->device_name
);
1309 schedule_work(&info
->task
);
1310 info
->bh_requested
= true;
1313 spin_unlock(&info
->lock
);
1315 if (debug_level
>= DEBUG_LEVEL_ISR
)
1316 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1317 __FILE__
, __LINE__
, info
->irq_level
);
1322 /* Initialize and start device.
1324 static int startup(MGSLPC_INFO
* info
)
1328 if (debug_level
>= DEBUG_LEVEL_INFO
)
1329 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1331 if (info
->flags
& ASYNC_INITIALIZED
)
1334 if (!info
->tx_buf
) {
1335 /* allocate a page of memory for a transmit buffer */
1336 info
->tx_buf
= (unsigned char *)get_zeroed_page(GFP_KERNEL
);
1337 if (!info
->tx_buf
) {
1338 printk(KERN_ERR
"%s(%d):%s can't allocate transmit buffer\n",
1339 __FILE__
,__LINE__
,info
->device_name
);
1344 info
->pending_bh
= 0;
1346 memset(&info
->icount
, 0, sizeof(info
->icount
));
1348 setup_timer(&info
->tx_timer
, tx_timeout
, (unsigned long)info
);
1350 /* Allocate and claim adapter resources */
1351 retval
= claim_resources(info
);
1353 /* perform existance check and diagnostics */
1355 retval
= adapter_test(info
);
1358 if (capable(CAP_SYS_ADMIN
) && info
->tty
)
1359 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1360 release_resources(info
);
1364 /* program hardware for current parameters */
1365 mgslpc_change_params(info
);
1368 clear_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1370 info
->flags
|= ASYNC_INITIALIZED
;
1375 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1377 static void shutdown(MGSLPC_INFO
* info
)
1379 unsigned long flags
;
1381 if (!(info
->flags
& ASYNC_INITIALIZED
))
1384 if (debug_level
>= DEBUG_LEVEL_INFO
)
1385 printk("%s(%d):mgslpc_shutdown(%s)\n",
1386 __FILE__
,__LINE__
, info
->device_name
);
1388 /* clear status wait queue because status changes */
1389 /* can't happen after shutting down the hardware */
1390 wake_up_interruptible(&info
->status_event_wait_q
);
1391 wake_up_interruptible(&info
->event_wait_q
);
1393 del_timer_sync(&info
->tx_timer
);
1396 free_page((unsigned long) info
->tx_buf
);
1397 info
->tx_buf
= NULL
;
1400 spin_lock_irqsave(&info
->lock
,flags
);
1405 /* TODO:disable interrupts instead of reset to preserve signal states */
1408 if (!info
->tty
|| info
->tty
->termios
->c_cflag
& HUPCL
) {
1409 info
->serial_signals
&= ~(SerialSignal_DTR
+ SerialSignal_RTS
);
1413 spin_unlock_irqrestore(&info
->lock
,flags
);
1415 release_resources(info
);
1418 set_bit(TTY_IO_ERROR
, &info
->tty
->flags
);
1420 info
->flags
&= ~ASYNC_INITIALIZED
;
1423 static void mgslpc_program_hw(MGSLPC_INFO
*info
)
1425 unsigned long flags
;
1427 spin_lock_irqsave(&info
->lock
,flags
);
1431 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1433 if (info
->params
.mode
== MGSL_MODE_HDLC
|| info
->netcount
)
1440 info
->dcd_chkcount
= 0;
1441 info
->cts_chkcount
= 0;
1442 info
->ri_chkcount
= 0;
1443 info
->dsr_chkcount
= 0;
1445 irq_enable(info
, CHB
, IRQ_DCD
| IRQ_CTS
);
1446 port_irq_enable(info
, (unsigned char) PVR_DSR
| PVR_RI
);
1449 if (info
->netcount
|| info
->tty
->termios
->c_cflag
& CREAD
)
1452 spin_unlock_irqrestore(&info
->lock
,flags
);
1455 /* Reconfigure adapter based on new parameters
1457 static void mgslpc_change_params(MGSLPC_INFO
*info
)
1462 if (!info
->tty
|| !info
->tty
->termios
)
1465 if (debug_level
>= DEBUG_LEVEL_INFO
)
1466 printk("%s(%d):mgslpc_change_params(%s)\n",
1467 __FILE__
,__LINE__
, info
->device_name
);
1469 cflag
= info
->tty
->termios
->c_cflag
;
1471 /* if B0 rate (hangup) specified then negate DTR and RTS */
1472 /* otherwise assert DTR and RTS */
1474 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
1476 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
1478 /* byte size and parity */
1480 switch (cflag
& CSIZE
) {
1481 case CS5
: info
->params
.data_bits
= 5; break;
1482 case CS6
: info
->params
.data_bits
= 6; break;
1483 case CS7
: info
->params
.data_bits
= 7; break;
1484 case CS8
: info
->params
.data_bits
= 8; break;
1485 default: info
->params
.data_bits
= 7; break;
1489 info
->params
.stop_bits
= 2;
1491 info
->params
.stop_bits
= 1;
1493 info
->params
.parity
= ASYNC_PARITY_NONE
;
1494 if (cflag
& PARENB
) {
1496 info
->params
.parity
= ASYNC_PARITY_ODD
;
1498 info
->params
.parity
= ASYNC_PARITY_EVEN
;
1501 info
->params
.parity
= ASYNC_PARITY_SPACE
;
1505 /* calculate number of jiffies to transmit a full
1506 * FIFO (32 bytes) at specified data rate
1508 bits_per_char
= info
->params
.data_bits
+
1509 info
->params
.stop_bits
+ 1;
1511 /* if port data rate is set to 460800 or less then
1512 * allow tty settings to override, otherwise keep the
1513 * current data rate.
1515 if (info
->params
.data_rate
<= 460800) {
1516 info
->params
.data_rate
= tty_get_baud_rate(info
->tty
);
1519 if ( info
->params
.data_rate
) {
1520 info
->timeout
= (32*HZ
*bits_per_char
) /
1521 info
->params
.data_rate
;
1523 info
->timeout
+= HZ
/50; /* Add .02 seconds of slop */
1525 if (cflag
& CRTSCTS
)
1526 info
->flags
|= ASYNC_CTS_FLOW
;
1528 info
->flags
&= ~ASYNC_CTS_FLOW
;
1531 info
->flags
&= ~ASYNC_CHECK_CD
;
1533 info
->flags
|= ASYNC_CHECK_CD
;
1535 /* process tty input control flags */
1537 info
->read_status_mask
= 0;
1538 if (I_INPCK(info
->tty
))
1539 info
->read_status_mask
|= BIT7
| BIT6
;
1540 if (I_IGNPAR(info
->tty
))
1541 info
->ignore_status_mask
|= BIT7
| BIT6
;
1543 mgslpc_program_hw(info
);
1546 /* Add a character to the transmit buffer
1548 static int mgslpc_put_char(struct tty_struct
*tty
, unsigned char ch
)
1550 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1551 unsigned long flags
;
1553 if (debug_level
>= DEBUG_LEVEL_INFO
) {
1554 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1555 __FILE__
,__LINE__
,ch
,info
->device_name
);
1558 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_put_char"))
1564 spin_lock_irqsave(&info
->lock
,flags
);
1566 if (info
->params
.mode
== MGSL_MODE_ASYNC
|| !info
->tx_active
) {
1567 if (info
->tx_count
< TXBUFSIZE
- 1) {
1568 info
->tx_buf
[info
->tx_put
++] = ch
;
1569 info
->tx_put
&= TXBUFSIZE
-1;
1574 spin_unlock_irqrestore(&info
->lock
,flags
);
1578 /* Enable transmitter so remaining characters in the
1579 * transmit buffer are sent.
1581 static void mgslpc_flush_chars(struct tty_struct
*tty
)
1583 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1584 unsigned long flags
;
1586 if (debug_level
>= DEBUG_LEVEL_INFO
)
1587 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1588 __FILE__
,__LINE__
,info
->device_name
,info
->tx_count
);
1590 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_chars"))
1593 if (info
->tx_count
<= 0 || tty
->stopped
||
1594 tty
->hw_stopped
|| !info
->tx_buf
)
1597 if (debug_level
>= DEBUG_LEVEL_INFO
)
1598 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1599 __FILE__
,__LINE__
,info
->device_name
);
1601 spin_lock_irqsave(&info
->lock
,flags
);
1602 if (!info
->tx_active
)
1604 spin_unlock_irqrestore(&info
->lock
,flags
);
1607 /* Send a block of data
1611 * tty pointer to tty information structure
1612 * buf pointer to buffer containing send data
1613 * count size of send data in bytes
1615 * Returns: number of characters written
1617 static int mgslpc_write(struct tty_struct
* tty
,
1618 const unsigned char *buf
, int count
)
1621 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1622 unsigned long flags
;
1624 if (debug_level
>= DEBUG_LEVEL_INFO
)
1625 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1626 __FILE__
,__LINE__
,info
->device_name
,count
);
1628 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write") ||
1632 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1633 if (count
> TXBUFSIZE
) {
1637 if (info
->tx_active
)
1639 else if (info
->tx_count
)
1645 min(TXBUFSIZE
- info
->tx_count
- 1,
1646 TXBUFSIZE
- info
->tx_put
));
1650 memcpy(info
->tx_buf
+ info
->tx_put
, buf
, c
);
1652 spin_lock_irqsave(&info
->lock
,flags
);
1653 info
->tx_put
= (info
->tx_put
+ c
) & (TXBUFSIZE
-1);
1654 info
->tx_count
+= c
;
1655 spin_unlock_irqrestore(&info
->lock
,flags
);
1662 if (info
->tx_count
&& !tty
->stopped
&& !tty
->hw_stopped
) {
1663 spin_lock_irqsave(&info
->lock
,flags
);
1664 if (!info
->tx_active
)
1666 spin_unlock_irqrestore(&info
->lock
,flags
);
1669 if (debug_level
>= DEBUG_LEVEL_INFO
)
1670 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1671 __FILE__
,__LINE__
,info
->device_name
,ret
);
1675 /* Return the count of free bytes in transmit buffer
1677 static int mgslpc_write_room(struct tty_struct
*tty
)
1679 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1682 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_write_room"))
1685 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1686 /* HDLC (frame oriented) mode */
1687 if (info
->tx_active
)
1690 return HDLC_MAX_FRAME_SIZE
;
1692 ret
= TXBUFSIZE
- info
->tx_count
- 1;
1697 if (debug_level
>= DEBUG_LEVEL_INFO
)
1698 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1699 __FILE__
,__LINE__
, info
->device_name
, ret
);
1703 /* Return the count of bytes in transmit buffer
1705 static int mgslpc_chars_in_buffer(struct tty_struct
*tty
)
1707 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1710 if (debug_level
>= DEBUG_LEVEL_INFO
)
1711 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1712 __FILE__
,__LINE__
, info
->device_name
);
1714 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_chars_in_buffer"))
1717 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1718 rc
= info
->tx_active
? info
->max_frame_size
: 0;
1720 rc
= info
->tx_count
;
1722 if (debug_level
>= DEBUG_LEVEL_INFO
)
1723 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1724 __FILE__
,__LINE__
, info
->device_name
, rc
);
1729 /* Discard all data in the send buffer
1731 static void mgslpc_flush_buffer(struct tty_struct
*tty
)
1733 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1734 unsigned long flags
;
1736 if (debug_level
>= DEBUG_LEVEL_INFO
)
1737 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1738 __FILE__
,__LINE__
, info
->device_name
);
1740 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_flush_buffer"))
1743 spin_lock_irqsave(&info
->lock
,flags
);
1744 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1745 del_timer(&info
->tx_timer
);
1746 spin_unlock_irqrestore(&info
->lock
,flags
);
1748 wake_up_interruptible(&tty
->write_wait
);
1752 /* Send a high-priority XON/XOFF character
1754 static void mgslpc_send_xchar(struct tty_struct
*tty
, char ch
)
1756 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1757 unsigned long flags
;
1759 if (debug_level
>= DEBUG_LEVEL_INFO
)
1760 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1761 __FILE__
,__LINE__
, info
->device_name
, ch
);
1763 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_send_xchar"))
1768 spin_lock_irqsave(&info
->lock
,flags
);
1769 if (!info
->tx_enabled
)
1771 spin_unlock_irqrestore(&info
->lock
,flags
);
1775 /* Signal remote device to throttle send data (our receive data)
1777 static void mgslpc_throttle(struct tty_struct
* tty
)
1779 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
1780 unsigned long flags
;
1782 if (debug_level
>= DEBUG_LEVEL_INFO
)
1783 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1784 __FILE__
,__LINE__
, info
->device_name
);
1786 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_throttle"))
1790 mgslpc_send_xchar(tty
, STOP_CHAR(tty
));
1792 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1793 spin_lock_irqsave(&info
->lock
,flags
);
1794 info
->serial_signals
&= ~SerialSignal_RTS
;
1796 spin_unlock_irqrestore(&info
->lock
,flags
);
1800 /* Signal remote device to stop throttling send data (our receive data)
1802 static void mgslpc_unthrottle(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_unthrottle(%s) entry\n",
1809 __FILE__
,__LINE__
, info
->device_name
);
1811 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_unthrottle"))
1818 mgslpc_send_xchar(tty
, START_CHAR(tty
));
1821 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1822 spin_lock_irqsave(&info
->lock
,flags
);
1823 info
->serial_signals
|= SerialSignal_RTS
;
1825 spin_unlock_irqrestore(&info
->lock
,flags
);
1829 /* get the current serial statistics
1831 static int get_stats(MGSLPC_INFO
* info
, struct mgsl_icount __user
*user_icount
)
1834 if (debug_level
>= DEBUG_LEVEL_INFO
)
1835 printk("get_params(%s)\n", info
->device_name
);
1837 memset(&info
->icount
, 0, sizeof(info
->icount
));
1839 COPY_TO_USER(err
, user_icount
, &info
->icount
, sizeof(struct mgsl_icount
));
1846 /* get the current serial parameters
1848 static int get_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*user_params
)
1851 if (debug_level
>= DEBUG_LEVEL_INFO
)
1852 printk("get_params(%s)\n", info
->device_name
);
1853 COPY_TO_USER(err
,user_params
, &info
->params
, sizeof(MGSL_PARAMS
));
1859 /* set the serial parameters
1863 * info pointer to device instance data
1864 * new_params user buffer containing new serial params
1866 * Returns: 0 if success, otherwise error code
1868 static int set_params(MGSLPC_INFO
* info
, MGSL_PARAMS __user
*new_params
)
1870 unsigned long flags
;
1871 MGSL_PARAMS tmp_params
;
1874 if (debug_level
>= DEBUG_LEVEL_INFO
)
1875 printk("%s(%d):set_params %s\n", __FILE__
,__LINE__
,
1876 info
->device_name
);
1877 COPY_FROM_USER(err
,&tmp_params
, new_params
, sizeof(MGSL_PARAMS
));
1879 if ( debug_level
>= DEBUG_LEVEL_INFO
)
1880 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1881 __FILE__
,__LINE__
,info
->device_name
);
1885 spin_lock_irqsave(&info
->lock
,flags
);
1886 memcpy(&info
->params
,&tmp_params
,sizeof(MGSL_PARAMS
));
1887 spin_unlock_irqrestore(&info
->lock
,flags
);
1889 mgslpc_change_params(info
);
1894 static int get_txidle(MGSLPC_INFO
* info
, int __user
*idle_mode
)
1897 if (debug_level
>= DEBUG_LEVEL_INFO
)
1898 printk("get_txidle(%s)=%d\n", info
->device_name
, info
->idle_mode
);
1899 COPY_TO_USER(err
,idle_mode
, &info
->idle_mode
, sizeof(int));
1905 static int set_txidle(MGSLPC_INFO
* info
, int idle_mode
)
1907 unsigned long flags
;
1908 if (debug_level
>= DEBUG_LEVEL_INFO
)
1909 printk("set_txidle(%s,%d)\n", info
->device_name
, idle_mode
);
1910 spin_lock_irqsave(&info
->lock
,flags
);
1911 info
->idle_mode
= idle_mode
;
1913 spin_unlock_irqrestore(&info
->lock
,flags
);
1917 static int get_interface(MGSLPC_INFO
* info
, int __user
*if_mode
)
1920 if (debug_level
>= DEBUG_LEVEL_INFO
)
1921 printk("get_interface(%s)=%d\n", info
->device_name
, info
->if_mode
);
1922 COPY_TO_USER(err
,if_mode
, &info
->if_mode
, sizeof(int));
1928 static int set_interface(MGSLPC_INFO
* info
, int if_mode
)
1930 unsigned long flags
;
1932 if (debug_level
>= DEBUG_LEVEL_INFO
)
1933 printk("set_interface(%s,%d)\n", info
->device_name
, if_mode
);
1934 spin_lock_irqsave(&info
->lock
,flags
);
1935 info
->if_mode
= if_mode
;
1937 val
= read_reg(info
, PVR
) & 0x0f;
1938 switch (info
->if_mode
)
1940 case MGSL_INTERFACE_RS232
: val
|= PVR_RS232
; break;
1941 case MGSL_INTERFACE_V35
: val
|= PVR_V35
; break;
1942 case MGSL_INTERFACE_RS422
: val
|= PVR_RS422
; break;
1944 write_reg(info
, PVR
, val
);
1946 spin_unlock_irqrestore(&info
->lock
,flags
);
1950 static int set_txenable(MGSLPC_INFO
* info
, int enable
)
1952 unsigned long flags
;
1954 if (debug_level
>= DEBUG_LEVEL_INFO
)
1955 printk("set_txenable(%s,%d)\n", info
->device_name
, enable
);
1957 spin_lock_irqsave(&info
->lock
,flags
);
1959 if (!info
->tx_enabled
)
1962 if (info
->tx_enabled
)
1965 spin_unlock_irqrestore(&info
->lock
,flags
);
1969 static int tx_abort(MGSLPC_INFO
* info
)
1971 unsigned long flags
;
1973 if (debug_level
>= DEBUG_LEVEL_INFO
)
1974 printk("tx_abort(%s)\n", info
->device_name
);
1976 spin_lock_irqsave(&info
->lock
,flags
);
1977 if (info
->tx_active
&& info
->tx_count
&&
1978 info
->params
.mode
== MGSL_MODE_HDLC
) {
1979 /* clear data count so FIFO is not filled on next IRQ.
1980 * This results in underrun and abort transmission.
1982 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1983 info
->tx_aborting
= true;
1985 spin_unlock_irqrestore(&info
->lock
,flags
);
1989 static int set_rxenable(MGSLPC_INFO
* info
, int enable
)
1991 unsigned long flags
;
1993 if (debug_level
>= DEBUG_LEVEL_INFO
)
1994 printk("set_rxenable(%s,%d)\n", info
->device_name
, enable
);
1996 spin_lock_irqsave(&info
->lock
,flags
);
1998 if (!info
->rx_enabled
)
2001 if (info
->rx_enabled
)
2004 spin_unlock_irqrestore(&info
->lock
,flags
);
2008 /* wait for specified event to occur
2010 * Arguments: info pointer to device instance data
2011 * mask pointer to bitmask of events to wait for
2012 * Return Value: 0 if successful and bit mask updated with
2013 * of events triggerred,
2014 * otherwise error code
2016 static int wait_events(MGSLPC_INFO
* info
, int __user
*mask_ptr
)
2018 unsigned long flags
;
2021 struct mgsl_icount cprev
, cnow
;
2024 struct _input_signal_events oldsigs
, newsigs
;
2025 DECLARE_WAITQUEUE(wait
, current
);
2027 COPY_FROM_USER(rc
,&mask
, mask_ptr
, sizeof(int));
2031 if (debug_level
>= DEBUG_LEVEL_INFO
)
2032 printk("wait_events(%s,%d)\n", info
->device_name
, mask
);
2034 spin_lock_irqsave(&info
->lock
,flags
);
2036 /* return immediately if state matches requested events */
2038 s
= info
->serial_signals
;
2040 ( ((s
& SerialSignal_DSR
) ? MgslEvent_DsrActive
:MgslEvent_DsrInactive
) +
2041 ((s
& SerialSignal_DCD
) ? MgslEvent_DcdActive
:MgslEvent_DcdInactive
) +
2042 ((s
& SerialSignal_CTS
) ? MgslEvent_CtsActive
:MgslEvent_CtsInactive
) +
2043 ((s
& SerialSignal_RI
) ? MgslEvent_RiActive
:MgslEvent_RiInactive
) );
2045 spin_unlock_irqrestore(&info
->lock
,flags
);
2049 /* save current irq counts */
2050 cprev
= info
->icount
;
2051 oldsigs
= info
->input_signal_events
;
2053 if ((info
->params
.mode
== MGSL_MODE_HDLC
) &&
2054 (mask
& MgslEvent_ExitHuntMode
))
2055 irq_enable(info
, CHA
, IRQ_EXITHUNT
);
2057 set_current_state(TASK_INTERRUPTIBLE
);
2058 add_wait_queue(&info
->event_wait_q
, &wait
);
2060 spin_unlock_irqrestore(&info
->lock
,flags
);
2065 if (signal_pending(current
)) {
2070 /* get current irq counts */
2071 spin_lock_irqsave(&info
->lock
,flags
);
2072 cnow
= info
->icount
;
2073 newsigs
= info
->input_signal_events
;
2074 set_current_state(TASK_INTERRUPTIBLE
);
2075 spin_unlock_irqrestore(&info
->lock
,flags
);
2077 /* if no change, wait aborted for some reason */
2078 if (newsigs
.dsr_up
== oldsigs
.dsr_up
&&
2079 newsigs
.dsr_down
== oldsigs
.dsr_down
&&
2080 newsigs
.dcd_up
== oldsigs
.dcd_up
&&
2081 newsigs
.dcd_down
== oldsigs
.dcd_down
&&
2082 newsigs
.cts_up
== oldsigs
.cts_up
&&
2083 newsigs
.cts_down
== oldsigs
.cts_down
&&
2084 newsigs
.ri_up
== oldsigs
.ri_up
&&
2085 newsigs
.ri_down
== oldsigs
.ri_down
&&
2086 cnow
.exithunt
== cprev
.exithunt
&&
2087 cnow
.rxidle
== cprev
.rxidle
) {
2093 ( (newsigs
.dsr_up
!= oldsigs
.dsr_up
? MgslEvent_DsrActive
:0) +
2094 (newsigs
.dsr_down
!= oldsigs
.dsr_down
? MgslEvent_DsrInactive
:0) +
2095 (newsigs
.dcd_up
!= oldsigs
.dcd_up
? MgslEvent_DcdActive
:0) +
2096 (newsigs
.dcd_down
!= oldsigs
.dcd_down
? MgslEvent_DcdInactive
:0) +
2097 (newsigs
.cts_up
!= oldsigs
.cts_up
? MgslEvent_CtsActive
:0) +
2098 (newsigs
.cts_down
!= oldsigs
.cts_down
? MgslEvent_CtsInactive
:0) +
2099 (newsigs
.ri_up
!= oldsigs
.ri_up
? MgslEvent_RiActive
:0) +
2100 (newsigs
.ri_down
!= oldsigs
.ri_down
? MgslEvent_RiInactive
:0) +
2101 (cnow
.exithunt
!= cprev
.exithunt
? MgslEvent_ExitHuntMode
:0) +
2102 (cnow
.rxidle
!= cprev
.rxidle
? MgslEvent_IdleReceived
:0) );
2110 remove_wait_queue(&info
->event_wait_q
, &wait
);
2111 set_current_state(TASK_RUNNING
);
2113 if (mask
& MgslEvent_ExitHuntMode
) {
2114 spin_lock_irqsave(&info
->lock
,flags
);
2115 if (!waitqueue_active(&info
->event_wait_q
))
2116 irq_disable(info
, CHA
, IRQ_EXITHUNT
);
2117 spin_unlock_irqrestore(&info
->lock
,flags
);
2121 PUT_USER(rc
, events
, mask_ptr
);
2125 static int modem_input_wait(MGSLPC_INFO
*info
,int arg
)
2127 unsigned long flags
;
2129 struct mgsl_icount cprev
, cnow
;
2130 DECLARE_WAITQUEUE(wait
, current
);
2132 /* save current irq counts */
2133 spin_lock_irqsave(&info
->lock
,flags
);
2134 cprev
= info
->icount
;
2135 add_wait_queue(&info
->status_event_wait_q
, &wait
);
2136 set_current_state(TASK_INTERRUPTIBLE
);
2137 spin_unlock_irqrestore(&info
->lock
,flags
);
2141 if (signal_pending(current
)) {
2146 /* get new irq counts */
2147 spin_lock_irqsave(&info
->lock
,flags
);
2148 cnow
= info
->icount
;
2149 set_current_state(TASK_INTERRUPTIBLE
);
2150 spin_unlock_irqrestore(&info
->lock
,flags
);
2152 /* if no change, wait aborted for some reason */
2153 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2154 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
) {
2159 /* check for change in caller specified modem input */
2160 if ((arg
& TIOCM_RNG
&& cnow
.rng
!= cprev
.rng
) ||
2161 (arg
& TIOCM_DSR
&& cnow
.dsr
!= cprev
.dsr
) ||
2162 (arg
& TIOCM_CD
&& cnow
.dcd
!= cprev
.dcd
) ||
2163 (arg
& TIOCM_CTS
&& cnow
.cts
!= cprev
.cts
)) {
2170 remove_wait_queue(&info
->status_event_wait_q
, &wait
);
2171 set_current_state(TASK_RUNNING
);
2175 /* return the state of the serial control and status signals
2177 static int tiocmget(struct tty_struct
*tty
, struct file
*file
)
2179 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2180 unsigned int result
;
2181 unsigned long flags
;
2183 spin_lock_irqsave(&info
->lock
,flags
);
2185 spin_unlock_irqrestore(&info
->lock
,flags
);
2187 result
= ((info
->serial_signals
& SerialSignal_RTS
) ? TIOCM_RTS
:0) +
2188 ((info
->serial_signals
& SerialSignal_DTR
) ? TIOCM_DTR
:0) +
2189 ((info
->serial_signals
& SerialSignal_DCD
) ? TIOCM_CAR
:0) +
2190 ((info
->serial_signals
& SerialSignal_RI
) ? TIOCM_RNG
:0) +
2191 ((info
->serial_signals
& SerialSignal_DSR
) ? TIOCM_DSR
:0) +
2192 ((info
->serial_signals
& SerialSignal_CTS
) ? TIOCM_CTS
:0);
2194 if (debug_level
>= DEBUG_LEVEL_INFO
)
2195 printk("%s(%d):%s tiocmget() value=%08X\n",
2196 __FILE__
,__LINE__
, info
->device_name
, result
);
2200 /* set modem control signals (DTR/RTS)
2202 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
2203 unsigned int set
, unsigned int clear
)
2205 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2206 unsigned long flags
;
2208 if (debug_level
>= DEBUG_LEVEL_INFO
)
2209 printk("%s(%d):%s tiocmset(%x,%x)\n",
2210 __FILE__
,__LINE__
,info
->device_name
, set
, clear
);
2212 if (set
& TIOCM_RTS
)
2213 info
->serial_signals
|= SerialSignal_RTS
;
2214 if (set
& TIOCM_DTR
)
2215 info
->serial_signals
|= SerialSignal_DTR
;
2216 if (clear
& TIOCM_RTS
)
2217 info
->serial_signals
&= ~SerialSignal_RTS
;
2218 if (clear
& TIOCM_DTR
)
2219 info
->serial_signals
&= ~SerialSignal_DTR
;
2221 spin_lock_irqsave(&info
->lock
,flags
);
2223 spin_unlock_irqrestore(&info
->lock
,flags
);
2228 /* Set or clear transmit break condition
2230 * Arguments: tty pointer to tty instance data
2231 * break_state -1=set break condition, 0=clear
2233 static void mgslpc_break(struct tty_struct
*tty
, int break_state
)
2235 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2236 unsigned long flags
;
2238 if (debug_level
>= DEBUG_LEVEL_INFO
)
2239 printk("%s(%d):mgslpc_break(%s,%d)\n",
2240 __FILE__
,__LINE__
, info
->device_name
, break_state
);
2242 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_break"))
2245 spin_lock_irqsave(&info
->lock
,flags
);
2246 if (break_state
== -1)
2247 set_reg_bits(info
, CHA
+DAFO
, BIT6
);
2249 clear_reg_bits(info
, CHA
+DAFO
, BIT6
);
2250 spin_unlock_irqrestore(&info
->lock
,flags
);
2253 /* Service an IOCTL request
2257 * tty pointer to tty instance data
2258 * file pointer to associated file object for device
2259 * cmd IOCTL command code
2260 * arg command argument/context
2262 * Return Value: 0 if success, otherwise error code
2264 static int mgslpc_ioctl(struct tty_struct
*tty
, struct file
* file
,
2265 unsigned int cmd
, unsigned long arg
)
2267 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2269 if (debug_level
>= DEBUG_LEVEL_INFO
)
2270 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2271 info
->device_name
, cmd
);
2273 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2276 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2277 (cmd
!= TIOCMIWAIT
) && (cmd
!= TIOCGICOUNT
)) {
2278 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2282 return ioctl_common(info
, cmd
, arg
);
2285 static int ioctl_common(MGSLPC_INFO
*info
, unsigned int cmd
, unsigned long arg
)
2288 struct mgsl_icount cnow
; /* kernel counter temps */
2289 struct serial_icounter_struct __user
*p_cuser
; /* user space */
2290 void __user
*argp
= (void __user
*)arg
;
2291 unsigned long flags
;
2294 case MGSL_IOCGPARAMS
:
2295 return get_params(info
, argp
);
2296 case MGSL_IOCSPARAMS
:
2297 return set_params(info
, argp
);
2298 case MGSL_IOCGTXIDLE
:
2299 return get_txidle(info
, argp
);
2300 case MGSL_IOCSTXIDLE
:
2301 return set_txidle(info
, (int)arg
);
2303 return get_interface(info
, argp
);
2305 return set_interface(info
,(int)arg
);
2306 case MGSL_IOCTXENABLE
:
2307 return set_txenable(info
,(int)arg
);
2308 case MGSL_IOCRXENABLE
:
2309 return set_rxenable(info
,(int)arg
);
2310 case MGSL_IOCTXABORT
:
2311 return tx_abort(info
);
2312 case MGSL_IOCGSTATS
:
2313 return get_stats(info
, argp
);
2314 case MGSL_IOCWAITEVENT
:
2315 return wait_events(info
, argp
);
2317 return modem_input_wait(info
,(int)arg
);
2319 spin_lock_irqsave(&info
->lock
,flags
);
2320 cnow
= info
->icount
;
2321 spin_unlock_irqrestore(&info
->lock
,flags
);
2323 PUT_USER(error
,cnow
.cts
, &p_cuser
->cts
);
2324 if (error
) return error
;
2325 PUT_USER(error
,cnow
.dsr
, &p_cuser
->dsr
);
2326 if (error
) return error
;
2327 PUT_USER(error
,cnow
.rng
, &p_cuser
->rng
);
2328 if (error
) return error
;
2329 PUT_USER(error
,cnow
.dcd
, &p_cuser
->dcd
);
2330 if (error
) return error
;
2331 PUT_USER(error
,cnow
.rx
, &p_cuser
->rx
);
2332 if (error
) return error
;
2333 PUT_USER(error
,cnow
.tx
, &p_cuser
->tx
);
2334 if (error
) return error
;
2335 PUT_USER(error
,cnow
.frame
, &p_cuser
->frame
);
2336 if (error
) return error
;
2337 PUT_USER(error
,cnow
.overrun
, &p_cuser
->overrun
);
2338 if (error
) return error
;
2339 PUT_USER(error
,cnow
.parity
, &p_cuser
->parity
);
2340 if (error
) return error
;
2341 PUT_USER(error
,cnow
.brk
, &p_cuser
->brk
);
2342 if (error
) return error
;
2343 PUT_USER(error
,cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
2344 if (error
) return error
;
2347 return -ENOIOCTLCMD
;
2352 /* Set new termios settings
2356 * tty pointer to tty structure
2357 * termios pointer to buffer to hold returned old termios
2359 static void mgslpc_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2361 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2362 unsigned long flags
;
2364 if (debug_level
>= DEBUG_LEVEL_INFO
)
2365 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2366 tty
->driver
->name
);
2368 /* just return if nothing has changed */
2369 if ((tty
->termios
->c_cflag
== old_termios
->c_cflag
)
2370 && (RELEVANT_IFLAG(tty
->termios
->c_iflag
)
2371 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2374 mgslpc_change_params(info
);
2376 /* Handle transition to B0 status */
2377 if (old_termios
->c_cflag
& CBAUD
&&
2378 !(tty
->termios
->c_cflag
& CBAUD
)) {
2379 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2380 spin_lock_irqsave(&info
->lock
,flags
);
2382 spin_unlock_irqrestore(&info
->lock
,flags
);
2385 /* Handle transition away from B0 status */
2386 if (!(old_termios
->c_cflag
& CBAUD
) &&
2387 tty
->termios
->c_cflag
& CBAUD
) {
2388 info
->serial_signals
|= SerialSignal_DTR
;
2389 if (!(tty
->termios
->c_cflag
& CRTSCTS
) ||
2390 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2391 info
->serial_signals
|= SerialSignal_RTS
;
2393 spin_lock_irqsave(&info
->lock
,flags
);
2395 spin_unlock_irqrestore(&info
->lock
,flags
);
2398 /* Handle turning off CRTSCTS */
2399 if (old_termios
->c_cflag
& CRTSCTS
&&
2400 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2401 tty
->hw_stopped
= 0;
2406 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2408 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2410 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2413 if (debug_level
>= DEBUG_LEVEL_INFO
)
2414 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2415 __FILE__
,__LINE__
, info
->device_name
, info
->count
);
2420 if (tty_hung_up_p(filp
))
2423 if ((tty
->count
== 1) && (info
->count
!= 1)) {
2425 * tty->count is 1 and the tty structure will be freed.
2426 * info->count should be one in this case.
2427 * if it's not, correct it so that the port is shutdown.
2429 printk("mgslpc_close: bad refcount; tty->count is 1, "
2430 "info->count is %d\n", info
->count
);
2436 /* if at least one open remaining, leave hardware active */
2440 info
->flags
|= ASYNC_CLOSING
;
2442 /* set tty->closing to notify line discipline to
2443 * only process XON/XOFF characters. Only the N_TTY
2444 * discipline appears to use this (ppp does not).
2448 /* wait for transmit data to clear all layers */
2450 if (info
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
) {
2451 if (debug_level
>= DEBUG_LEVEL_INFO
)
2452 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2453 __FILE__
,__LINE__
, info
->device_name
);
2454 tty_wait_until_sent(tty
, info
->closing_wait
);
2457 if (info
->flags
& ASYNC_INITIALIZED
)
2458 mgslpc_wait_until_sent(tty
, info
->timeout
);
2460 mgslpc_flush_buffer(tty
);
2462 tty_ldisc_flush(tty
);
2469 if (info
->blocked_open
) {
2470 if (info
->close_delay
) {
2471 msleep_interruptible(jiffies_to_msecs(info
->close_delay
));
2473 wake_up_interruptible(&info
->open_wait
);
2476 info
->flags
&= ~(ASYNC_NORMAL_ACTIVE
|ASYNC_CLOSING
);
2478 wake_up_interruptible(&info
->close_wait
);
2481 if (debug_level
>= DEBUG_LEVEL_INFO
)
2482 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2483 tty
->driver
->name
, info
->count
);
2486 /* Wait until the transmitter is empty.
2488 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2490 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2491 unsigned long orig_jiffies
, char_time
;
2496 if (debug_level
>= DEBUG_LEVEL_INFO
)
2497 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2498 __FILE__
,__LINE__
, info
->device_name
);
2500 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2503 if (!(info
->flags
& ASYNC_INITIALIZED
))
2506 orig_jiffies
= jiffies
;
2508 /* Set check interval to 1/5 of estimated time to
2509 * send a character, and make it at least 1. The check
2510 * interval should also be less than the timeout.
2511 * Note: use tight timings here to satisfy the NIST-PCTS.
2514 if ( info
->params
.data_rate
) {
2515 char_time
= info
->timeout
/(32 * 5);
2522 char_time
= min_t(unsigned long, char_time
, timeout
);
2524 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2525 while (info
->tx_active
) {
2526 msleep_interruptible(jiffies_to_msecs(char_time
));
2527 if (signal_pending(current
))
2529 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2533 while ((info
->tx_count
|| info
->tx_active
) &&
2535 msleep_interruptible(jiffies_to_msecs(char_time
));
2536 if (signal_pending(current
))
2538 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2544 if (debug_level
>= DEBUG_LEVEL_INFO
)
2545 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2546 __FILE__
,__LINE__
, info
->device_name
);
2549 /* Called by tty_hangup() when a hangup is signaled.
2550 * This is the same as closing all open files for the port.
2552 static void mgslpc_hangup(struct tty_struct
*tty
)
2554 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2556 if (debug_level
>= DEBUG_LEVEL_INFO
)
2557 printk("%s(%d):mgslpc_hangup(%s)\n",
2558 __FILE__
,__LINE__
, info
->device_name
);
2560 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2563 mgslpc_flush_buffer(tty
);
2567 info
->flags
&= ~ASYNC_NORMAL_ACTIVE
;
2570 wake_up_interruptible(&info
->open_wait
);
2573 /* Block the current process until the specified port
2574 * is ready to be opened.
2576 static int block_til_ready(struct tty_struct
*tty
, struct file
*filp
,
2579 DECLARE_WAITQUEUE(wait
, current
);
2581 bool do_clocal
= false;
2582 bool extra_count
= false;
2583 unsigned long flags
;
2585 if (debug_level
>= DEBUG_LEVEL_INFO
)
2586 printk("%s(%d):block_til_ready on %s\n",
2587 __FILE__
,__LINE__
, tty
->driver
->name
);
2589 if (filp
->f_flags
& O_NONBLOCK
|| tty
->flags
& (1 << TTY_IO_ERROR
)){
2590 /* nonblock mode is set or port is not enabled */
2591 /* just verify that callout device is not active */
2592 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2596 if (tty
->termios
->c_cflag
& CLOCAL
)
2599 /* Wait for carrier detect and the line to become
2600 * free (i.e., not in use by the callout). While we are in
2601 * this loop, info->count is dropped by one, so that
2602 * mgslpc_close() knows when to free things. We restore it upon
2603 * exit, either normal or abnormal.
2607 add_wait_queue(&info
->open_wait
, &wait
);
2609 if (debug_level
>= DEBUG_LEVEL_INFO
)
2610 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2611 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2613 spin_lock_irqsave(&info
->lock
, flags
);
2614 if (!tty_hung_up_p(filp
)) {
2618 spin_unlock_irqrestore(&info
->lock
, flags
);
2619 info
->blocked_open
++;
2622 if ((tty
->termios
->c_cflag
& CBAUD
)) {
2623 spin_lock_irqsave(&info
->lock
,flags
);
2624 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2626 spin_unlock_irqrestore(&info
->lock
,flags
);
2629 set_current_state(TASK_INTERRUPTIBLE
);
2631 if (tty_hung_up_p(filp
) || !(info
->flags
& ASYNC_INITIALIZED
)){
2632 retval
= (info
->flags
& ASYNC_HUP_NOTIFY
) ?
2633 -EAGAIN
: -ERESTARTSYS
;
2637 spin_lock_irqsave(&info
->lock
,flags
);
2639 spin_unlock_irqrestore(&info
->lock
,flags
);
2641 if (!(info
->flags
& ASYNC_CLOSING
) &&
2642 (do_clocal
|| (info
->serial_signals
& SerialSignal_DCD
)) ) {
2646 if (signal_pending(current
)) {
2647 retval
= -ERESTARTSYS
;
2651 if (debug_level
>= DEBUG_LEVEL_INFO
)
2652 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2653 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2658 set_current_state(TASK_RUNNING
);
2659 remove_wait_queue(&info
->open_wait
, &wait
);
2663 info
->blocked_open
--;
2665 if (debug_level
>= DEBUG_LEVEL_INFO
)
2666 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2667 __FILE__
,__LINE__
, tty
->driver
->name
, info
->count
);
2670 info
->flags
|= ASYNC_NORMAL_ACTIVE
;
2675 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2679 unsigned long flags
;
2681 /* verify range of specified line number */
2683 if ((line
< 0) || (line
>= mgslpc_device_count
)) {
2684 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2685 __FILE__
,__LINE__
,line
);
2689 /* find the info structure for the specified line */
2690 info
= mgslpc_device_list
;
2691 while(info
&& info
->line
!= line
)
2692 info
= info
->next_device
;
2693 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2696 tty
->driver_data
= info
;
2699 if (debug_level
>= DEBUG_LEVEL_INFO
)
2700 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2701 __FILE__
,__LINE__
,tty
->driver
->name
, info
->count
);
2703 /* If port is closing, signal caller to try again */
2704 if (tty_hung_up_p(filp
) || info
->flags
& ASYNC_CLOSING
){
2705 if (info
->flags
& ASYNC_CLOSING
)
2706 interruptible_sleep_on(&info
->close_wait
);
2707 retval
= ((info
->flags
& ASYNC_HUP_NOTIFY
) ?
2708 -EAGAIN
: -ERESTARTSYS
);
2712 info
->tty
->low_latency
= (info
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2714 spin_lock_irqsave(&info
->netlock
, flags
);
2715 if (info
->netcount
) {
2717 spin_unlock_irqrestore(&info
->netlock
, flags
);
2721 spin_unlock_irqrestore(&info
->netlock
, flags
);
2723 if (info
->count
== 1) {
2724 /* 1st open on this device, init hardware */
2725 retval
= startup(info
);
2730 retval
= block_til_ready(tty
, filp
, info
);
2732 if (debug_level
>= DEBUG_LEVEL_INFO
)
2733 printk("%s(%d):block_til_ready(%s) returned %d\n",
2734 __FILE__
,__LINE__
, info
->device_name
, retval
);
2738 if (debug_level
>= DEBUG_LEVEL_INFO
)
2739 printk("%s(%d):mgslpc_open(%s) success\n",
2740 __FILE__
,__LINE__
, info
->device_name
);
2745 if (tty
->count
== 1)
2746 info
->tty
= NULL
; /* tty layer will release tty struct */
2755 * /proc fs routines....
2758 static inline int line_info(char *buf
, MGSLPC_INFO
*info
)
2762 unsigned long flags
;
2764 ret
= sprintf(buf
, "%s:io:%04X irq:%d",
2765 info
->device_name
, info
->io_base
, info
->irq_level
);
2767 /* output current serial signal states */
2768 spin_lock_irqsave(&info
->lock
,flags
);
2770 spin_unlock_irqrestore(&info
->lock
,flags
);
2774 if (info
->serial_signals
& SerialSignal_RTS
)
2775 strcat(stat_buf
, "|RTS");
2776 if (info
->serial_signals
& SerialSignal_CTS
)
2777 strcat(stat_buf
, "|CTS");
2778 if (info
->serial_signals
& SerialSignal_DTR
)
2779 strcat(stat_buf
, "|DTR");
2780 if (info
->serial_signals
& SerialSignal_DSR
)
2781 strcat(stat_buf
, "|DSR");
2782 if (info
->serial_signals
& SerialSignal_DCD
)
2783 strcat(stat_buf
, "|CD");
2784 if (info
->serial_signals
& SerialSignal_RI
)
2785 strcat(stat_buf
, "|RI");
2787 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2788 ret
+= sprintf(buf
+ret
, " HDLC txok:%d rxok:%d",
2789 info
->icount
.txok
, info
->icount
.rxok
);
2790 if (info
->icount
.txunder
)
2791 ret
+= sprintf(buf
+ret
, " txunder:%d", info
->icount
.txunder
);
2792 if (info
->icount
.txabort
)
2793 ret
+= sprintf(buf
+ret
, " txabort:%d", info
->icount
.txabort
);
2794 if (info
->icount
.rxshort
)
2795 ret
+= sprintf(buf
+ret
, " rxshort:%d", info
->icount
.rxshort
);
2796 if (info
->icount
.rxlong
)
2797 ret
+= sprintf(buf
+ret
, " rxlong:%d", info
->icount
.rxlong
);
2798 if (info
->icount
.rxover
)
2799 ret
+= sprintf(buf
+ret
, " rxover:%d", info
->icount
.rxover
);
2800 if (info
->icount
.rxcrc
)
2801 ret
+= sprintf(buf
+ret
, " rxcrc:%d", info
->icount
.rxcrc
);
2803 ret
+= sprintf(buf
+ret
, " ASYNC tx:%d rx:%d",
2804 info
->icount
.tx
, info
->icount
.rx
);
2805 if (info
->icount
.frame
)
2806 ret
+= sprintf(buf
+ret
, " fe:%d", info
->icount
.frame
);
2807 if (info
->icount
.parity
)
2808 ret
+= sprintf(buf
+ret
, " pe:%d", info
->icount
.parity
);
2809 if (info
->icount
.brk
)
2810 ret
+= sprintf(buf
+ret
, " brk:%d", info
->icount
.brk
);
2811 if (info
->icount
.overrun
)
2812 ret
+= sprintf(buf
+ret
, " oe:%d", info
->icount
.overrun
);
2815 /* Append serial signal status to end */
2816 ret
+= sprintf(buf
+ret
, " %s\n", stat_buf
+1);
2818 ret
+= sprintf(buf
+ret
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2819 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2825 /* Called to print information about devices
2827 static int mgslpc_read_proc(char *page
, char **start
, off_t off
, int count
,
2828 int *eof
, void *data
)
2834 len
+= sprintf(page
, "synclink driver:%s\n", driver_version
);
2836 info
= mgslpc_device_list
;
2838 l
= line_info(page
+ len
, info
);
2840 if (len
+begin
> off
+count
)
2842 if (len
+begin
< off
) {
2846 info
= info
->next_device
;
2851 if (off
>= len
+begin
)
2853 *start
= page
+ (off
-begin
);
2854 return ((count
< begin
+len
-off
) ? count
: begin
+len
-off
);
2857 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2859 /* each buffer has header and data */
2860 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2862 /* calculate total allocation size for 8 buffers */
2863 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2865 /* limit total allocated memory */
2866 if (info
->rx_buf_total_size
> 0x10000)
2867 info
->rx_buf_total_size
= 0x10000;
2869 /* calculate number of buffers */
2870 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2872 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2873 if (info
->rx_buf
== NULL
)
2876 rx_reset_buffers(info
);
2880 static void rx_free_buffers(MGSLPC_INFO
*info
)
2882 kfree(info
->rx_buf
);
2883 info
->rx_buf
= NULL
;
2886 static int claim_resources(MGSLPC_INFO
*info
)
2888 if (rx_alloc_buffers(info
) < 0 ) {
2889 printk( "Cant allocate rx buffer %s\n", info
->device_name
);
2890 release_resources(info
);
2896 static void release_resources(MGSLPC_INFO
*info
)
2898 if (debug_level
>= DEBUG_LEVEL_INFO
)
2899 printk("release_resources(%s)\n", info
->device_name
);
2900 rx_free_buffers(info
);
2903 /* Add the specified device instance data structure to the
2904 * global linked list of devices and increment the device count.
2906 * Arguments: info pointer to device instance data
2908 static void mgslpc_add_device(MGSLPC_INFO
*info
)
2910 info
->next_device
= NULL
;
2911 info
->line
= mgslpc_device_count
;
2912 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2914 if (info
->line
< MAX_DEVICE_COUNT
) {
2915 if (maxframe
[info
->line
])
2916 info
->max_frame_size
= maxframe
[info
->line
];
2917 info
->dosyncppp
= dosyncppp
[info
->line
];
2920 mgslpc_device_count
++;
2922 if (!mgslpc_device_list
)
2923 mgslpc_device_list
= info
;
2925 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
2926 while( current_dev
->next_device
)
2927 current_dev
= current_dev
->next_device
;
2928 current_dev
->next_device
= info
;
2931 if (info
->max_frame_size
< 4096)
2932 info
->max_frame_size
= 4096;
2933 else if (info
->max_frame_size
> 65535)
2934 info
->max_frame_size
= 65535;
2936 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2937 info
->device_name
, info
->io_base
, info
->irq_level
);
2939 #if SYNCLINK_GENERIC_HDLC
2944 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2946 MGSLPC_INFO
*info
= mgslpc_device_list
;
2947 MGSLPC_INFO
*last
= NULL
;
2950 if (info
== remove_info
) {
2952 last
->next_device
= info
->next_device
;
2954 mgslpc_device_list
= info
->next_device
;
2955 #if SYNCLINK_GENERIC_HDLC
2958 release_resources(info
);
2960 mgslpc_device_count
--;
2964 info
= info
->next_device
;
2968 static struct pcmcia_device_id mgslpc_ids
[] = {
2969 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2972 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2974 static struct pcmcia_driver mgslpc_driver
= {
2975 .owner
= THIS_MODULE
,
2977 .name
= "synclink_cs",
2979 .probe
= mgslpc_probe
,
2980 .remove
= mgslpc_detach
,
2981 .id_table
= mgslpc_ids
,
2982 .suspend
= mgslpc_suspend
,
2983 .resume
= mgslpc_resume
,
2986 static const struct tty_operations mgslpc_ops
= {
2987 .open
= mgslpc_open
,
2988 .close
= mgslpc_close
,
2989 .write
= mgslpc_write
,
2990 .put_char
= mgslpc_put_char
,
2991 .flush_chars
= mgslpc_flush_chars
,
2992 .write_room
= mgslpc_write_room
,
2993 .chars_in_buffer
= mgslpc_chars_in_buffer
,
2994 .flush_buffer
= mgslpc_flush_buffer
,
2995 .ioctl
= mgslpc_ioctl
,
2996 .throttle
= mgslpc_throttle
,
2997 .unthrottle
= mgslpc_unthrottle
,
2998 .send_xchar
= mgslpc_send_xchar
,
2999 .break_ctl
= mgslpc_break
,
3000 .wait_until_sent
= mgslpc_wait_until_sent
,
3001 .read_proc
= mgslpc_read_proc
,
3002 .set_termios
= mgslpc_set_termios
,
3004 .start
= tx_release
,
3005 .hangup
= mgslpc_hangup
,
3006 .tiocmget
= tiocmget
,
3007 .tiocmset
= tiocmset
,
3010 static void synclink_cs_cleanup(void)
3014 printk("Unloading %s: version %s\n", driver_name
, driver_version
);
3016 while(mgslpc_device_list
)
3017 mgslpc_remove_device(mgslpc_device_list
);
3019 if (serial_driver
) {
3020 if ((rc
= tty_unregister_driver(serial_driver
)))
3021 printk("%s(%d) failed to unregister tty driver err=%d\n",
3022 __FILE__
,__LINE__
,rc
);
3023 put_tty_driver(serial_driver
);
3026 pcmcia_unregister_driver(&mgslpc_driver
);
3029 static int __init
synclink_cs_init(void)
3033 if (break_on_load
) {
3034 mgslpc_get_text_ptr();
3038 printk("%s %s\n", driver_name
, driver_version
);
3040 if ((rc
= pcmcia_register_driver(&mgslpc_driver
)) < 0)
3043 serial_driver
= alloc_tty_driver(MAX_DEVICE_COUNT
);
3044 if (!serial_driver
) {
3049 /* Initialize the tty_driver structure */
3051 serial_driver
->owner
= THIS_MODULE
;
3052 serial_driver
->driver_name
= "synclink_cs";
3053 serial_driver
->name
= "ttySLP";
3054 serial_driver
->major
= ttymajor
;
3055 serial_driver
->minor_start
= 64;
3056 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
3057 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
3058 serial_driver
->init_termios
= tty_std_termios
;
3059 serial_driver
->init_termios
.c_cflag
=
3060 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
3061 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
3062 tty_set_operations(serial_driver
, &mgslpc_ops
);
3064 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
3065 printk("%s(%d):Couldn't register serial driver\n",
3067 put_tty_driver(serial_driver
);
3068 serial_driver
= NULL
;
3072 printk("%s %s, tty major#%d\n",
3073 driver_name
, driver_version
,
3074 serial_driver
->major
);
3079 synclink_cs_cleanup();
3083 static void __exit
synclink_cs_exit(void)
3085 synclink_cs_cleanup();
3088 module_init(synclink_cs_init
);
3089 module_exit(synclink_cs_exit
);
3091 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
3096 /* note:standard BRG mode is broken in V3.2 chip
3097 * so enhanced mode is always used
3105 for (M
= 1; N
> 64 && M
< 16; M
++)
3111 * BGR[7..0] contained in BGR register
3112 * BGR[9..8] contained in CCR2[7..6]
3113 * divisor = (N+1)*2^M
3115 * Note: M *must* not be zero (causes asymetric duty cycle)
3117 write_reg(info
, (unsigned char) (channel
+ BGR
),
3118 (unsigned char) ((M
<< 6) + N
));
3119 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
3120 val
|= ((M
<< 4) & 0xc0);
3121 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
3125 /* Enabled the AUX clock output at the specified frequency.
3127 static void enable_auxclk(MGSLPC_INFO
*info
)
3133 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3134 * 05 ADM Address Mode, 0 = no addr recognition
3135 * 04 TMD Timer Mode, 0 = external
3136 * 03 RAC Receiver Active, 0 = inactive
3137 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3138 * 01 TRS Timer Resolution, 1=512
3139 * 00 TLP Test Loop, 0 = no loop
3145 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3146 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3148 write_reg(info
, CHB
+ MODE
, val
);
3152 * 07 PU Power Up, 1=active, 0=power down
3153 * 06 MCE Master Clock Enable, 1=enabled
3155 * 04..02 SC[2..0] Encoding
3156 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3160 write_reg(info
, CHB
+ CCR0
, 0xc0);
3164 * 07 SFLG Shared Flag, 0 = disable shared flags
3165 * 06 GALP Go Active On Loop, 0 = not used
3166 * 05 GLP Go On Loop, 0 = not used
3167 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3168 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3169 * 02..00 CM[2..0] Clock Mode
3173 write_reg(info
, CHB
+ CCR1
, 0x17);
3177 * 07..06 BGR[9..8] Baud rate bits 9..8
3178 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3179 * 04 SSEL Clock source select, 1=submode b
3180 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3181 * 02 RWX Read/Write Exchange 0=disabled
3182 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3183 * 00 DIV, data inversion 0=disabled, 1=enabled
3187 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3188 write_reg(info
, CHB
+ CCR2
, 0x38);
3190 write_reg(info
, CHB
+ CCR2
, 0x30);
3194 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3195 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3196 * 05 TST1 Test Pin, 0=normal operation
3197 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3198 * 03..02 Reserved, must be 0
3199 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3203 write_reg(info
, CHB
+ CCR4
, 0x50);
3205 /* if auxclk not enabled, set internal BRG so
3206 * CTS transitions can be detected (requires TxC)
3208 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3209 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
3211 mgslpc_set_rate(info
, CHB
, 921600);
3214 static void loopback_enable(MGSLPC_INFO
*info
)
3218 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3219 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
3220 write_reg(info
, CHA
+ CCR1
, val
);
3222 /* CCR2:04 SSEL Clock source select, 1=submode b */
3223 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3224 write_reg(info
, CHA
+ CCR2
, val
);
3226 /* set LinkSpeed if available, otherwise default to 2Mbps */
3227 if (info
->params
.clock_speed
)
3228 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3230 mgslpc_set_rate(info
, CHA
, 1843200);
3232 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3233 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3234 write_reg(info
, CHA
+ MODE
, val
);
3237 static void hdlc_mode(MGSLPC_INFO
*info
)
3240 unsigned char clkmode
, clksubmode
;
3242 /* disable all interrupts */
3243 irq_disable(info
, CHA
, 0xffff);
3244 irq_disable(info
, CHB
, 0xffff);
3245 port_irq_disable(info
, 0xff);
3247 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3248 clkmode
= clksubmode
= 0;
3249 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3250 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3251 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3253 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3254 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3255 /* clock mode 7b, rcv = BRG, xmt = BRG */
3258 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3259 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3260 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3264 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3267 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3268 /* clock mode 0b, rcv = RxC, xmt = BRG */
3274 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3275 * 05 ADM Address Mode, 0 = no addr recognition
3276 * 04 TMD Timer Mode, 0 = external
3277 * 03 RAC Receiver Active, 0 = inactive
3278 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3279 * 01 TRS Timer Resolution, 1=512
3280 * 00 TLP Test Loop, 0 = no loop
3285 if (info
->params
.loopback
)
3288 /* preserve RTS state */
3289 if (info
->serial_signals
& SerialSignal_RTS
)
3291 write_reg(info
, CHA
+ MODE
, val
);
3295 * 07 PU Power Up, 1=active, 0=power down
3296 * 06 MCE Master Clock Enable, 1=enabled
3298 * 04..02 SC[2..0] Encoding
3299 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3304 switch (info
->params
.encoding
)
3306 case HDLC_ENCODING_NRZI
:
3309 case HDLC_ENCODING_BIPHASE_SPACE
:
3312 case HDLC_ENCODING_BIPHASE_MARK
:
3315 case HDLC_ENCODING_BIPHASE_LEVEL
:
3317 break; // Manchester
3319 write_reg(info
, CHA
+ CCR0
, val
);
3323 * 07 SFLG Shared Flag, 0 = disable shared flags
3324 * 06 GALP Go Active On Loop, 0 = not used
3325 * 05 GLP Go On Loop, 0 = not used
3326 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3327 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3328 * 02..00 CM[2..0] Clock Mode
3332 val
= 0x10 + clkmode
;
3333 write_reg(info
, CHA
+ CCR1
, val
);
3337 * 07..06 BGR[9..8] Baud rate bits 9..8
3338 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3339 * 04 SSEL Clock source select, 1=submode b
3340 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3341 * 02 RWX Read/Write Exchange 0=disabled
3342 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3343 * 00 DIV, data inversion 0=disabled, 1=enabled
3348 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3349 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3353 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3355 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3357 write_reg(info
, CHA
+ CCR2
, val
);
3361 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3362 * 05 EPT Enable preamble transmission, 1=enabled
3363 * 04 RADD Receive address pushed to FIFO, 0=disabled
3364 * 03 CRL CRC Reset Level, 0=FFFF
3365 * 02 RCRC Rx CRC 0=On 1=Off
3366 * 01 TCRC Tx CRC 0=On 1=Off
3367 * 00 PSD DPLL Phase Shift Disable
3372 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3374 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3376 switch (info
->params
.preamble_length
)
3378 case HDLC_PREAMBLE_LENGTH_16BITS
:
3381 case HDLC_PREAMBLE_LENGTH_32BITS
:
3384 case HDLC_PREAMBLE_LENGTH_64BITS
:
3388 write_reg(info
, CHA
+ CCR3
, val
);
3390 /* PRE - Preamble pattern */
3392 switch (info
->params
.preamble
)
3394 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3395 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3396 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3397 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3399 write_reg(info
, CHA
+ PRE
, val
);
3403 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3404 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3405 * 05 TST1 Test Pin, 0=normal operation
3406 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3407 * 03..02 Reserved, must be 0
3408 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3413 write_reg(info
, CHA
+ CCR4
, val
);
3414 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3415 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3417 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3419 /* RLCR Receive length check register
3421 * 7 1=enable receive length check
3422 * 6..0 Max frame length = (RL + 1) * 32
3424 write_reg(info
, CHA
+ RLCR
, 0);
3426 /* XBCH Transmit Byte Count High
3428 * 07 DMA mode, 0 = interrupt driven
3429 * 06 NRM, 0=ABM (ignored)
3430 * 05 CAS Carrier Auto Start
3431 * 04 XC Transmit Continuously (ignored)
3432 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3437 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3439 write_reg(info
, CHA
+ XBCH
, val
);
3440 enable_auxclk(info
);
3441 if (info
->params
.loopback
|| info
->testing_irq
)
3442 loopback_enable(info
);
3443 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3445 irq_enable(info
, CHB
, IRQ_CTS
);
3446 /* PVR[3] 1=AUTO CTS active */
3447 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3449 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3451 irq_enable(info
, CHA
,
3452 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3453 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3454 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3455 wait_command_complete(info
, CHA
);
3456 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3458 /* Master clock mode enabled above to allow reset commands
3459 * to complete even if no data clocks are present.
3461 * Disable master clock mode for normal communications because
3462 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3463 * IRQ when in master clock mode.
3465 * Leave master clock mode enabled for IRQ test because the
3466 * timer IRQ used by the test can only happen in master clock mode.
3468 if (!info
->testing_irq
)
3469 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3477 static void rx_stop(MGSLPC_INFO
*info
)
3479 if (debug_level
>= DEBUG_LEVEL_ISR
)
3480 printk("%s(%d):rx_stop(%s)\n",
3481 __FILE__
,__LINE__
, info
->device_name
);
3483 /* MODE:03 RAC Receiver Active, 0=inactive */
3484 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3486 info
->rx_enabled
= false;
3487 info
->rx_overflow
= false;
3490 static void rx_start(MGSLPC_INFO
*info
)
3492 if (debug_level
>= DEBUG_LEVEL_ISR
)
3493 printk("%s(%d):rx_start(%s)\n",
3494 __FILE__
,__LINE__
, info
->device_name
);
3496 rx_reset_buffers(info
);
3497 info
->rx_enabled
= false;
3498 info
->rx_overflow
= false;
3500 /* MODE:03 RAC Receiver Active, 1=active */
3501 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3503 info
->rx_enabled
= true;
3506 static void tx_start(MGSLPC_INFO
*info
)
3508 if (debug_level
>= DEBUG_LEVEL_ISR
)
3509 printk("%s(%d):tx_start(%s)\n",
3510 __FILE__
,__LINE__
, info
->device_name
);
3512 if (info
->tx_count
) {
3513 /* If auto RTS enabled and RTS is inactive, then assert */
3514 /* RTS and set a flag indicating that the driver should */
3515 /* negate RTS when the transmission completes. */
3516 info
->drop_rts_on_tx_done
= false;
3518 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3520 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3521 info
->serial_signals
|= SerialSignal_RTS
;
3523 info
->drop_rts_on_tx_done
= true;
3527 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3528 if (!info
->tx_active
) {
3529 info
->tx_active
= true;
3533 info
->tx_active
= true;
3535 mod_timer(&info
->tx_timer
, jiffies
+
3536 msecs_to_jiffies(5000));
3540 if (!info
->tx_enabled
)
3541 info
->tx_enabled
= true;
3544 static void tx_stop(MGSLPC_INFO
*info
)
3546 if (debug_level
>= DEBUG_LEVEL_ISR
)
3547 printk("%s(%d):tx_stop(%s)\n",
3548 __FILE__
,__LINE__
, info
->device_name
);
3550 del_timer(&info
->tx_timer
);
3552 info
->tx_enabled
= false;
3553 info
->tx_active
= false;
3556 /* Reset the adapter to a known state and prepare it for further use.
3558 static void reset_device(MGSLPC_INFO
*info
)
3560 /* power up both channels (set BIT7) */
3561 write_reg(info
, CHA
+ CCR0
, 0x80);
3562 write_reg(info
, CHB
+ CCR0
, 0x80);
3563 write_reg(info
, CHA
+ MODE
, 0);
3564 write_reg(info
, CHB
+ MODE
, 0);
3566 /* disable all interrupts */
3567 irq_disable(info
, CHA
, 0xffff);
3568 irq_disable(info
, CHB
, 0xffff);
3569 port_irq_disable(info
, 0xff);
3571 /* PCR Port Configuration Register
3573 * 07..04 DEC[3..0] Serial I/F select outputs
3574 * 03 output, 1=AUTO CTS control enabled
3575 * 02 RI Ring Indicator input 0=active
3576 * 01 DSR input 0=active
3577 * 00 DTR output 0=active
3581 write_reg(info
, PCR
, 0x06);
3583 /* PVR Port Value Register
3585 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3586 * 03 AUTO CTS output 1=enabled
3587 * 02 RI Ring Indicator input
3589 * 00 DTR output (1=inactive)
3593 // write_reg(info, PVR, PVR_DTR);
3595 /* IPC Interrupt Port Configuration
3597 * 07 VIS 1=Masked interrupts visible
3598 * 06..05 Reserved, 0
3599 * 04..03 SLA Slave address, 00 ignored
3600 * 02 CASM Cascading Mode, 1=daisy chain
3601 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3605 write_reg(info
, IPC
, 0x05);
3608 static void async_mode(MGSLPC_INFO
*info
)
3612 /* disable all interrupts */
3613 irq_disable(info
, CHA
, 0xffff);
3614 irq_disable(info
, CHB
, 0xffff);
3615 port_irq_disable(info
, 0xff);
3620 * 06 FRTS RTS State, 0=active
3621 * 05 FCTS Flow Control on CTS
3622 * 04 FLON Flow Control Enable
3623 * 03 RAC Receiver Active, 0 = inactive
3624 * 02 RTS 0=Auto RTS, 1=manual RTS
3625 * 01 TRS Timer Resolution, 1=512
3626 * 00 TLP Test Loop, 0 = no loop
3631 if (info
->params
.loopback
)
3634 /* preserve RTS state */
3635 if (!(info
->serial_signals
& SerialSignal_RTS
))
3637 write_reg(info
, CHA
+ MODE
, val
);
3641 * 07 PU Power Up, 1=active, 0=power down
3642 * 06 MCE Master Clock Enable, 1=enabled
3644 * 04..02 SC[2..0] Encoding, 000=NRZ
3645 * 01..00 SM[1..0] Serial Mode, 11=Async
3649 write_reg(info
, CHA
+ CCR0
, 0x83);
3653 * 07..05 Reserved, 0
3654 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3655 * 03 BCR Bit Clock Rate, 1=16x
3656 * 02..00 CM[2..0] Clock Mode, 111=BRG
3660 write_reg(info
, CHA
+ CCR1
, 0x1f);
3664 * 07..06 BGR[9..8] Baud rate bits 9..8
3665 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3666 * 04 SSEL Clock source select, 1=submode b
3667 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3668 * 02 RWX Read/Write Exchange 0=disabled
3670 * 00 DIV, data inversion 0=disabled, 1=enabled
3674 write_reg(info
, CHA
+ CCR2
, 0x10);
3678 * 07..01 Reserved, 0
3679 * 00 PSD DPLL Phase Shift Disable
3683 write_reg(info
, CHA
+ CCR3
, 0);
3687 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3688 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3689 * 05 TST1 Test Pin, 0=normal operation
3690 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3691 * 03..00 Reserved, must be 0
3695 write_reg(info
, CHA
+ CCR4
, 0x50);
3696 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3701 * 06 XBRK transmit break, 0=normal operation
3702 * 05 Stop bits (0=1, 1=2)
3703 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3704 * 02 PAREN Parity Enable
3705 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3709 if (info
->params
.data_bits
!= 8)
3710 val
|= BIT0
; /* 7 bits */
3711 if (info
->params
.stop_bits
!= 1)
3713 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3715 val
|= BIT2
; /* Parity enable */
3716 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3721 write_reg(info
, CHA
+ DAFO
, val
);
3723 /* RFC Rx FIFO Control
3726 * 06 DPS, 1=parity bit not stored in data byte
3727 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3728 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3729 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3731 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3735 write_reg(info
, CHA
+ RFC
, 0x5c);
3737 /* RLCR Receive length check register
3739 * Max frame length = (RL + 1) * 32
3741 write_reg(info
, CHA
+ RLCR
, 0);
3743 /* XBCH Transmit Byte Count High
3745 * 07 DMA mode, 0 = interrupt driven
3746 * 06 NRM, 0=ABM (ignored)
3747 * 05 CAS Carrier Auto Start
3748 * 04 XC Transmit Continuously (ignored)
3749 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3754 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3756 write_reg(info
, CHA
+ XBCH
, val
);
3757 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3758 irq_enable(info
, CHA
, IRQ_CTS
);
3760 /* MODE:03 RAC Receiver Active, 1=active */
3761 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3762 enable_auxclk(info
);
3763 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3764 irq_enable(info
, CHB
, IRQ_CTS
);
3765 /* PVR[3] 1=AUTO CTS active */
3766 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3768 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3769 irq_enable(info
, CHA
,
3770 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3771 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3772 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3773 wait_command_complete(info
, CHA
);
3774 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3777 /* Set the HDLC idle mode for the transmitter.
3779 static void tx_set_idle(MGSLPC_INFO
*info
)
3781 /* Note: ESCC2 only supports flags and one idle modes */
3782 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3783 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3785 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3788 /* get state of the V24 status (input) signals.
3790 static void get_signals(MGSLPC_INFO
*info
)
3792 unsigned char status
= 0;
3794 /* preserve DTR and RTS */
3795 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3797 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3798 info
->serial_signals
|= SerialSignal_DCD
;
3799 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3800 info
->serial_signals
|= SerialSignal_CTS
;
3802 status
= read_reg(info
, CHA
+ PVR
);
3803 if (!(status
& PVR_RI
))
3804 info
->serial_signals
|= SerialSignal_RI
;
3805 if (!(status
& PVR_DSR
))
3806 info
->serial_signals
|= SerialSignal_DSR
;
3809 /* Set the state of DTR and RTS based on contents of
3810 * serial_signals member of device extension.
3812 static void set_signals(MGSLPC_INFO
*info
)
3816 val
= read_reg(info
, CHA
+ MODE
);
3817 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3818 if (info
->serial_signals
& SerialSignal_RTS
)
3823 if (info
->serial_signals
& SerialSignal_RTS
)
3828 write_reg(info
, CHA
+ MODE
, val
);
3830 if (info
->serial_signals
& SerialSignal_DTR
)
3831 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3833 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3836 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3843 info
->rx_frame_count
= 0;
3844 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3845 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3846 buf
->status
= buf
->count
= 0;
3850 /* Attempt to return a received HDLC frame
3851 * Only frames received without errors are returned.
3853 * Returns true if frame returned, otherwise false
3855 static bool rx_get_frame(MGSLPC_INFO
*info
)
3857 unsigned short status
;
3859 unsigned int framesize
= 0;
3860 unsigned long flags
;
3861 struct tty_struct
*tty
= info
->tty
;
3862 bool return_frame
= false;
3864 if (info
->rx_frame_count
== 0)
3867 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3869 status
= buf
->status
;
3871 /* 07 VFR 1=valid frame
3872 * 06 RDO 1=data overrun
3873 * 05 CRC 1=OK, 0=error
3874 * 04 RAB 1=frame aborted
3876 if ((status
& 0xf0) != 0xA0) {
3877 if (!(status
& BIT7
) || (status
& BIT4
))
3878 info
->icount
.rxabort
++;
3879 else if (status
& BIT6
)
3880 info
->icount
.rxover
++;
3881 else if (!(status
& BIT5
)) {
3882 info
->icount
.rxcrc
++;
3883 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3884 return_frame
= true;
3887 #if SYNCLINK_GENERIC_HDLC
3889 struct net_device_stats
*stats
= hdlc_stats(info
->netdev
);
3891 stats
->rx_frame_errors
++;
3895 return_frame
= true;
3898 framesize
= buf
->count
;
3900 if (debug_level
>= DEBUG_LEVEL_BH
)
3901 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3902 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
3904 if (debug_level
>= DEBUG_LEVEL_DATA
)
3905 trace_block(info
, buf
->data
, framesize
, 0);
3908 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3909 framesize
+1 > info
->max_frame_size
) ||
3910 framesize
> info
->max_frame_size
)
3911 info
->icount
.rxlong
++;
3914 info
->icount
.rxok
++;
3916 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3917 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3921 #if SYNCLINK_GENERIC_HDLC
3923 hdlcdev_rx(info
, buf
->data
, framesize
);
3926 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3930 spin_lock_irqsave(&info
->lock
,flags
);
3931 buf
->status
= buf
->count
= 0;
3932 info
->rx_frame_count
--;
3934 if (info
->rx_get
>= info
->rx_buf_count
)
3936 spin_unlock_irqrestore(&info
->lock
,flags
);
3941 static bool register_test(MGSLPC_INFO
*info
)
3943 static unsigned char patterns
[] =
3944 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3945 static unsigned int count
= ARRAY_SIZE(patterns
);
3948 unsigned long flags
;
3950 spin_lock_irqsave(&info
->lock
,flags
);
3953 for (i
= 0; i
< count
; i
++) {
3954 write_reg(info
, XAD1
, patterns
[i
]);
3955 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3956 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3957 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3963 spin_unlock_irqrestore(&info
->lock
,flags
);
3967 static bool irq_test(MGSLPC_INFO
*info
)
3969 unsigned long end_time
;
3970 unsigned long flags
;
3972 spin_lock_irqsave(&info
->lock
,flags
);
3975 info
->testing_irq
= true;
3978 info
->irq_occurred
= false;
3980 /* init hdlc mode */
3982 irq_enable(info
, CHA
, IRQ_TIMER
);
3983 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
3984 issue_command(info
, CHA
, CMD_START_TIMER
);
3986 spin_unlock_irqrestore(&info
->lock
,flags
);
3989 while(end_time
-- && !info
->irq_occurred
) {
3990 msleep_interruptible(10);
3993 info
->testing_irq
= false;
3995 spin_lock_irqsave(&info
->lock
,flags
);
3997 spin_unlock_irqrestore(&info
->lock
,flags
);
3999 return info
->irq_occurred
;
4002 static int adapter_test(MGSLPC_INFO
*info
)
4004 if (!register_test(info
)) {
4005 info
->init_error
= DiagStatus_AddressFailure
;
4006 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4007 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
4011 if (!irq_test(info
)) {
4012 info
->init_error
= DiagStatus_IrqFailure
;
4013 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4014 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
4018 if (debug_level
>= DEBUG_LEVEL_INFO
)
4019 printk("%s(%d):device %s passed diagnostics\n",
4020 __FILE__
,__LINE__
,info
->device_name
);
4024 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
4029 printk("%s tx data:\n",info
->device_name
);
4031 printk("%s rx data:\n",info
->device_name
);
4039 for(i
=0;i
<linecount
;i
++)
4040 printk("%02X ",(unsigned char)data
[i
]);
4043 for(i
=0;i
<linecount
;i
++) {
4044 if (data
[i
]>=040 && data
[i
]<=0176)
4045 printk("%c",data
[i
]);
4056 /* HDLC frame time out
4057 * update stats and do tx completion processing
4059 static void tx_timeout(unsigned long context
)
4061 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
4062 unsigned long flags
;
4064 if ( debug_level
>= DEBUG_LEVEL_INFO
)
4065 printk( "%s(%d):tx_timeout(%s)\n",
4066 __FILE__
,__LINE__
,info
->device_name
);
4067 if(info
->tx_active
&&
4068 info
->params
.mode
== MGSL_MODE_HDLC
) {
4069 info
->icount
.txtimeout
++;
4071 spin_lock_irqsave(&info
->lock
,flags
);
4072 info
->tx_active
= false;
4073 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
4075 spin_unlock_irqrestore(&info
->lock
,flags
);
4077 #if SYNCLINK_GENERIC_HDLC
4079 hdlcdev_tx_done(info
);
4085 #if SYNCLINK_GENERIC_HDLC
4088 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4089 * set encoding and frame check sequence (FCS) options
4091 * dev pointer to network device structure
4092 * encoding serial encoding setting
4093 * parity FCS setting
4095 * returns 0 if success, otherwise error code
4097 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
4098 unsigned short parity
)
4100 MGSLPC_INFO
*info
= dev_to_port(dev
);
4101 unsigned char new_encoding
;
4102 unsigned short new_crctype
;
4104 /* return error if TTY interface open */
4110 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
4111 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
4112 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
4113 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
4114 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
4115 default: return -EINVAL
;
4120 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
4121 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
4122 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
4123 default: return -EINVAL
;
4126 info
->params
.encoding
= new_encoding
;
4127 info
->params
.crc_type
= new_crctype
;
4129 /* if network interface up, reprogram hardware */
4131 mgslpc_program_hw(info
);
4137 * called by generic HDLC layer to send frame
4139 * skb socket buffer containing HDLC frame
4140 * dev pointer to network device structure
4142 * returns 0 if success, otherwise error code
4144 static int hdlcdev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4146 MGSLPC_INFO
*info
= dev_to_port(dev
);
4147 struct net_device_stats
*stats
= hdlc_stats(dev
);
4148 unsigned long flags
;
4150 if (debug_level
>= DEBUG_LEVEL_INFO
)
4151 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
4153 /* stop sending until this frame completes */
4154 netif_stop_queue(dev
);
4156 /* copy data to device buffers */
4157 skb_copy_from_linear_data(skb
, info
->tx_buf
, skb
->len
);
4159 info
->tx_put
= info
->tx_count
= skb
->len
;
4161 /* update network statistics */
4162 stats
->tx_packets
++;
4163 stats
->tx_bytes
+= skb
->len
;
4165 /* done with socket buffer, so free it */
4168 /* save start time for transmit timeout detection */
4169 dev
->trans_start
= jiffies
;
4171 /* start hardware transmitter if necessary */
4172 spin_lock_irqsave(&info
->lock
,flags
);
4173 if (!info
->tx_active
)
4175 spin_unlock_irqrestore(&info
->lock
,flags
);
4181 * called by network layer when interface enabled
4182 * claim resources and initialize hardware
4184 * dev pointer to network device structure
4186 * returns 0 if success, otherwise error code
4188 static int hdlcdev_open(struct net_device
*dev
)
4190 MGSLPC_INFO
*info
= dev_to_port(dev
);
4192 unsigned long flags
;
4194 if (debug_level
>= DEBUG_LEVEL_INFO
)
4195 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
4197 /* generic HDLC layer open processing */
4198 if ((rc
= hdlc_open(dev
)))
4201 /* arbitrate between network and tty opens */
4202 spin_lock_irqsave(&info
->netlock
, flags
);
4203 if (info
->count
!= 0 || info
->netcount
!= 0) {
4204 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
4205 spin_unlock_irqrestore(&info
->netlock
, flags
);
4209 spin_unlock_irqrestore(&info
->netlock
, flags
);
4211 /* claim resources and init adapter */
4212 if ((rc
= startup(info
)) != 0) {
4213 spin_lock_irqsave(&info
->netlock
, flags
);
4215 spin_unlock_irqrestore(&info
->netlock
, flags
);
4219 /* assert DTR and RTS, apply hardware settings */
4220 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4221 mgslpc_program_hw(info
);
4223 /* enable network layer transmit */
4224 dev
->trans_start
= jiffies
;
4225 netif_start_queue(dev
);
4227 /* inform generic HDLC layer of current DCD status */
4228 spin_lock_irqsave(&info
->lock
, flags
);
4230 spin_unlock_irqrestore(&info
->lock
, flags
);
4231 if (info
->serial_signals
& SerialSignal_DCD
)
4232 netif_carrier_on(dev
);
4234 netif_carrier_off(dev
);
4239 * called by network layer when interface is disabled
4240 * shutdown hardware and release resources
4242 * dev pointer to network device structure
4244 * returns 0 if success, otherwise error code
4246 static int hdlcdev_close(struct net_device
*dev
)
4248 MGSLPC_INFO
*info
= dev_to_port(dev
);
4249 unsigned long flags
;
4251 if (debug_level
>= DEBUG_LEVEL_INFO
)
4252 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4254 netif_stop_queue(dev
);
4256 /* shutdown adapter and release resources */
4261 spin_lock_irqsave(&info
->netlock
, flags
);
4263 spin_unlock_irqrestore(&info
->netlock
, flags
);
4269 * called by network layer to process IOCTL call to network device
4271 * dev pointer to network device structure
4272 * ifr pointer to network interface request structure
4273 * cmd IOCTL command code
4275 * returns 0 if success, otherwise error code
4277 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4279 const size_t size
= sizeof(sync_serial_settings
);
4280 sync_serial_settings new_line
;
4281 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4282 MGSLPC_INFO
*info
= dev_to_port(dev
);
4285 if (debug_level
>= DEBUG_LEVEL_INFO
)
4286 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4288 /* return error if TTY interface open */
4292 if (cmd
!= SIOCWANDEV
)
4293 return hdlc_ioctl(dev
, ifr
, cmd
);
4295 switch(ifr
->ifr_settings
.type
) {
4296 case IF_GET_IFACE
: /* return current sync_serial_settings */
4298 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4299 if (ifr
->ifr_settings
.size
< size
) {
4300 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4304 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4305 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4306 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4307 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4310 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4311 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4312 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4313 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4314 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4317 new_line
.clock_rate
= info
->params
.clock_speed
;
4318 new_line
.loopback
= info
->params
.loopback
? 1:0;
4320 if (copy_to_user(line
, &new_line
, size
))
4324 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4326 if(!capable(CAP_NET_ADMIN
))
4328 if (copy_from_user(&new_line
, line
, size
))
4331 switch (new_line
.clock_type
)
4333 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4334 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4335 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4336 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4337 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4338 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4339 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4340 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4341 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4342 default: return -EINVAL
;
4345 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4348 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4349 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4350 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4351 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4352 info
->params
.flags
|= flags
;
4354 info
->params
.loopback
= new_line
.loopback
;
4356 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4357 info
->params
.clock_speed
= new_line
.clock_rate
;
4359 info
->params
.clock_speed
= 0;
4361 /* if network interface up, reprogram hardware */
4363 mgslpc_program_hw(info
);
4367 return hdlc_ioctl(dev
, ifr
, cmd
);
4372 * called by network layer when transmit timeout is detected
4374 * dev pointer to network device structure
4376 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4378 MGSLPC_INFO
*info
= dev_to_port(dev
);
4379 struct net_device_stats
*stats
= hdlc_stats(dev
);
4380 unsigned long flags
;
4382 if (debug_level
>= DEBUG_LEVEL_INFO
)
4383 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4386 stats
->tx_aborted_errors
++;
4388 spin_lock_irqsave(&info
->lock
,flags
);
4390 spin_unlock_irqrestore(&info
->lock
,flags
);
4392 netif_wake_queue(dev
);
4396 * called by device driver when transmit completes
4397 * reenable network layer transmit if stopped
4399 * info pointer to device instance information
4401 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4403 if (netif_queue_stopped(info
->netdev
))
4404 netif_wake_queue(info
->netdev
);
4408 * called by device driver when frame received
4409 * pass frame to network layer
4411 * info pointer to device instance information
4412 * buf pointer to buffer contianing frame data
4413 * size count of data bytes in buf
4415 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4417 struct sk_buff
*skb
= dev_alloc_skb(size
);
4418 struct net_device
*dev
= info
->netdev
;
4419 struct net_device_stats
*stats
= hdlc_stats(dev
);
4421 if (debug_level
>= DEBUG_LEVEL_INFO
)
4422 printk("hdlcdev_rx(%s)\n",dev
->name
);
4425 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4426 stats
->rx_dropped
++;
4430 memcpy(skb_put(skb
, size
),buf
,size
);
4432 skb
->protocol
= hdlc_type_trans(skb
, info
->netdev
);
4434 stats
->rx_packets
++;
4435 stats
->rx_bytes
+= size
;
4439 info
->netdev
->last_rx
= jiffies
;
4443 * called by device driver when adding device instance
4444 * do generic HDLC initialization
4446 * info pointer to device instance information
4448 * returns 0 if success, otherwise error code
4450 static int hdlcdev_init(MGSLPC_INFO
*info
)
4453 struct net_device
*dev
;
4456 /* allocate and initialize network and HDLC layer objects */
4458 if (!(dev
= alloc_hdlcdev(info
))) {
4459 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4463 /* for network layer reporting purposes only */
4464 dev
->base_addr
= info
->io_base
;
4465 dev
->irq
= info
->irq_level
;
4467 /* network layer callbacks and settings */
4468 dev
->do_ioctl
= hdlcdev_ioctl
;
4469 dev
->open
= hdlcdev_open
;
4470 dev
->stop
= hdlcdev_close
;
4471 dev
->tx_timeout
= hdlcdev_tx_timeout
;
4472 dev
->watchdog_timeo
= 10*HZ
;
4473 dev
->tx_queue_len
= 50;
4475 /* generic HDLC layer callbacks and settings */
4476 hdlc
= dev_to_hdlc(dev
);
4477 hdlc
->attach
= hdlcdev_attach
;
4478 hdlc
->xmit
= hdlcdev_xmit
;
4480 /* register objects with HDLC layer */
4481 if ((rc
= register_hdlc_device(dev
))) {
4482 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4492 * called by device driver when removing device instance
4493 * do generic HDLC cleanup
4495 * info pointer to device instance information
4497 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4499 unregister_hdlc_device(info
->netdev
);
4500 free_netdev(info
->netdev
);
4501 info
->netdev
= NULL
;
4504 #endif /* CONFIG_HDLC */