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 struct tty_port port
;
142 void *if_ptr
; /* General purpose pointer (used by SPPP) */
146 struct mgsl_icount icount
;
149 int x_char
; /* xon/xoff character */
150 unsigned char read_status_mask
;
151 unsigned char ignore_status_mask
;
153 unsigned char *tx_buf
;
158 /* circular list of fixed length rx buffers */
160 unsigned char *rx_buf
; /* memory allocated for all rx buffers */
161 int rx_buf_total_size
; /* size of memory allocated for rx buffers */
162 int rx_put
; /* index of next empty rx buffer */
163 int rx_get
; /* index of next full rx buffer */
164 int rx_buf_size
; /* size in bytes of single rx buffer */
165 int rx_buf_count
; /* total number of rx buffers */
166 int rx_frame_count
; /* number of full rx buffers */
168 wait_queue_head_t status_event_wait_q
;
169 wait_queue_head_t event_wait_q
;
170 struct timer_list tx_timer
; /* HDLC transmit timeout timer */
171 struct _mgslpc_info
*next_device
; /* device list link */
173 unsigned short imra_value
;
174 unsigned short imrb_value
;
175 unsigned char pim_value
;
178 struct work_struct task
; /* task structure for scheduling bh */
187 int dcd_chkcount
; /* check counts to prevent */
188 int cts_chkcount
; /* too many IRQs if a signal */
189 int dsr_chkcount
; /* is floating */
200 int if_mode
; /* serial interface selection (RS-232, v.35 etc) */
202 char device_name
[25]; /* device instance name */
204 unsigned int io_base
; /* base I/O address of adapter */
205 unsigned int irq_level
;
207 MGSL_PARAMS params
; /* communications parameters */
209 unsigned char serial_signals
; /* current serial signal states */
211 bool irq_occurred
; /* for diagnostics use */
213 unsigned int init_error
; /* startup error (DIAGS) */
215 char flag_buf
[MAX_ASYNC_BUFFER_SIZE
];
216 bool drop_rts_on_tx_done
;
218 struct _input_signal_events input_signal_events
;
221 struct pcmcia_device
*p_dev
;
225 /* SPPP/Cisco HDLC device parts */
229 #if SYNCLINK_GENERIC_HDLC
230 struct net_device
*netdev
;
235 #define MGSLPC_MAGIC 0x5402
238 * The size of the serial xmit buffer is 1 page, or 4096 bytes
240 #define TXBUFSIZE 4096
243 #define CHA 0x00 /* channel A offset */
244 #define CHB 0x40 /* channel B offset */
247 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
294 #define IRQ_BREAK_ON BIT15 // rx break detected
295 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
296 #define IRQ_ALLSENT BIT13 // all sent
297 #define IRQ_UNDERRUN BIT12 // transmit data underrun
298 #define IRQ_TIMER BIT11 // timer interrupt
299 #define IRQ_CTS BIT10 // CTS status change
300 #define IRQ_TXREPEAT BIT9 // tx message repeat
301 #define IRQ_TXFIFO BIT8 // transmit pool ready
302 #define IRQ_RXEOM BIT7 // receive message end
303 #define IRQ_EXITHUNT BIT6 // receive frame start
304 #define IRQ_RXTIME BIT6 // rx char timeout
305 #define IRQ_DCD BIT2 // carrier detect status change
306 #define IRQ_OVERRUN BIT1 // receive frame overflow
307 #define IRQ_RXFIFO BIT0 // receive pool full
311 #define XFW BIT6 // transmit FIFO write enable
312 #define CEC BIT2 // command executing
313 #define CTS BIT1 // CTS state
318 #define PVR_AUTOCTS BIT3
319 #define PVR_RS232 0x20 /* 0010b */
320 #define PVR_V35 0xe0 /* 1110b */
321 #define PVR_RS422 0x40 /* 0100b */
323 /* Register access functions */
325 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
326 #define read_reg(info, reg) inb((info)->io_base + (reg))
328 #define read_reg16(info, reg) inw((info)->io_base + (reg))
329 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
331 #define set_reg_bits(info, reg, mask) \
332 write_reg(info, (reg), \
333 (unsigned char) (read_reg(info, (reg)) | (mask)))
334 #define clear_reg_bits(info, reg, mask) \
335 write_reg(info, (reg), \
336 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
338 * interrupt enable/disable routines
340 static void irq_disable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
342 if (channel
== CHA
) {
343 info
->imra_value
|= mask
;
344 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
346 info
->imrb_value
|= mask
;
347 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
350 static void irq_enable(MGSLPC_INFO
*info
, unsigned char channel
, unsigned short mask
)
352 if (channel
== CHA
) {
353 info
->imra_value
&= ~mask
;
354 write_reg16(info
, CHA
+ IMR
, info
->imra_value
);
356 info
->imrb_value
&= ~mask
;
357 write_reg16(info
, CHB
+ IMR
, info
->imrb_value
);
361 #define port_irq_disable(info, mask) \
362 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
364 #define port_irq_enable(info, mask) \
365 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
367 static void rx_start(MGSLPC_INFO
*info
);
368 static void rx_stop(MGSLPC_INFO
*info
);
370 static void tx_start(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
371 static void tx_stop(MGSLPC_INFO
*info
);
372 static void tx_set_idle(MGSLPC_INFO
*info
);
374 static void get_signals(MGSLPC_INFO
*info
);
375 static void set_signals(MGSLPC_INFO
*info
);
377 static void reset_device(MGSLPC_INFO
*info
);
379 static void hdlc_mode(MGSLPC_INFO
*info
);
380 static void async_mode(MGSLPC_INFO
*info
);
382 static void tx_timeout(unsigned long context
);
384 static int carrier_raised(struct tty_port
*port
);
385 static void raise_dtr_rts(struct tty_port
*port
);
387 #if SYNCLINK_GENERIC_HDLC
388 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
389 static void hdlcdev_tx_done(MGSLPC_INFO
*info
);
390 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
);
391 static int hdlcdev_init(MGSLPC_INFO
*info
);
392 static void hdlcdev_exit(MGSLPC_INFO
*info
);
395 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
);
397 static bool register_test(MGSLPC_INFO
*info
);
398 static bool irq_test(MGSLPC_INFO
*info
);
399 static int adapter_test(MGSLPC_INFO
*info
);
401 static int claim_resources(MGSLPC_INFO
*info
);
402 static void release_resources(MGSLPC_INFO
*info
);
403 static void mgslpc_add_device(MGSLPC_INFO
*info
);
404 static void mgslpc_remove_device(MGSLPC_INFO
*info
);
406 static bool rx_get_frame(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
407 static void rx_reset_buffers(MGSLPC_INFO
*info
);
408 static int rx_alloc_buffers(MGSLPC_INFO
*info
);
409 static void rx_free_buffers(MGSLPC_INFO
*info
);
411 static irqreturn_t
mgslpc_isr(int irq
, void *dev_id
);
414 * Bottom half interrupt handlers
416 static void bh_handler(struct work_struct
*work
);
417 static void bh_transmit(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
418 static void bh_status(MGSLPC_INFO
*info
);
423 static int tiocmget(struct tty_struct
*tty
, struct file
*file
);
424 static int tiocmset(struct tty_struct
*tty
, struct file
*file
,
425 unsigned int set
, unsigned int clear
);
426 static int get_stats(MGSLPC_INFO
*info
, struct mgsl_icount __user
*user_icount
);
427 static int get_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*user_params
);
428 static int set_params(MGSLPC_INFO
*info
, MGSL_PARAMS __user
*new_params
, struct tty_struct
*tty
);
429 static int get_txidle(MGSLPC_INFO
*info
, int __user
*idle_mode
);
430 static int set_txidle(MGSLPC_INFO
*info
, int idle_mode
);
431 static int set_txenable(MGSLPC_INFO
*info
, int enable
, struct tty_struct
*tty
);
432 static int tx_abort(MGSLPC_INFO
*info
);
433 static int set_rxenable(MGSLPC_INFO
*info
, int enable
);
434 static int wait_events(MGSLPC_INFO
*info
, int __user
*mask
);
436 static MGSLPC_INFO
*mgslpc_device_list
= NULL
;
437 static int mgslpc_device_count
= 0;
440 * Set this param to non-zero to load eax with the
441 * .text section address and breakpoint on module load.
442 * This is useful for use with gdb and add-symbol-file command.
444 static int break_on_load
=0;
447 * Driver major number, defaults to zero to get auto
448 * assigned major number. May be forced as module parameter.
450 static int ttymajor
=0;
452 static int debug_level
= 0;
453 static int maxframe
[MAX_DEVICE_COUNT
] = {0,};
455 module_param(break_on_load
, bool, 0);
456 module_param(ttymajor
, int, 0);
457 module_param(debug_level
, int, 0);
458 module_param_array(maxframe
, int, NULL
, 0);
460 MODULE_LICENSE("GPL");
462 static char *driver_name
= "SyncLink PC Card driver";
463 static char *driver_version
= "$Revision: 4.34 $";
465 static struct tty_driver
*serial_driver
;
467 /* number of characters left in xmit buffer before we ask for more */
468 #define WAKEUP_CHARS 256
470 static void mgslpc_change_params(MGSLPC_INFO
*info
, struct tty_struct
*tty
);
471 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
);
473 /* PCMCIA prototypes */
475 static int mgslpc_config(struct pcmcia_device
*link
);
476 static void mgslpc_release(u_long arg
);
477 static void mgslpc_detach(struct pcmcia_device
*p_dev
);
480 * 1st function defined in .text section. Calling this function in
481 * init_module() followed by a breakpoint allows a remote debugger
482 * (gdb) to get the .text address for the add-symbol-file command.
483 * This allows remote debugging of dynamically loadable modules.
485 static void* mgslpc_get_text_ptr(void)
487 return mgslpc_get_text_ptr
;
491 * line discipline callback wrappers
493 * The wrappers maintain line discipline references
494 * while calling into the line discipline.
496 * ldisc_receive_buf - pass receive data to line discipline
499 static void ldisc_receive_buf(struct tty_struct
*tty
,
500 const __u8
*data
, char *flags
, int count
)
502 struct tty_ldisc
*ld
;
505 ld
= tty_ldisc_ref(tty
);
507 if (ld
->ops
->receive_buf
)
508 ld
->ops
->receive_buf(tty
, data
, flags
, count
);
513 static const struct tty_port_operations mgslpc_port_ops
= {
514 .carrier_raised
= carrier_raised
,
515 .raise_dtr_rts
= raise_dtr_rts
518 static int mgslpc_probe(struct pcmcia_device
*link
)
523 if (debug_level
>= DEBUG_LEVEL_INFO
)
524 printk("mgslpc_attach\n");
526 info
= kzalloc(sizeof(MGSLPC_INFO
), GFP_KERNEL
);
528 printk("Error can't allocate device instance data\n");
532 info
->magic
= MGSLPC_MAGIC
;
533 tty_port_init(&info
->port
);
534 info
->port
.ops
= &mgslpc_port_ops
;
535 INIT_WORK(&info
->task
, bh_handler
);
536 info
->max_frame_size
= 4096;
537 info
->port
.close_delay
= 5*HZ
/10;
538 info
->port
.closing_wait
= 30*HZ
;
539 init_waitqueue_head(&info
->status_event_wait_q
);
540 init_waitqueue_head(&info
->event_wait_q
);
541 spin_lock_init(&info
->lock
);
542 spin_lock_init(&info
->netlock
);
543 memcpy(&info
->params
,&default_params
,sizeof(MGSL_PARAMS
));
544 info
->idle_mode
= HDLC_TXIDLE_FLAGS
;
545 info
->imra_value
= 0xffff;
546 info
->imrb_value
= 0xffff;
547 info
->pim_value
= 0xff;
552 /* Initialize the struct pcmcia_device structure */
554 /* Interrupt setup */
555 link
->irq
.Attributes
= IRQ_TYPE_DYNAMIC_SHARING
;
556 link
->irq
.IRQInfo1
= IRQ_LEVEL_ID
;
557 link
->irq
.Handler
= NULL
;
559 link
->conf
.Attributes
= 0;
560 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
562 ret
= mgslpc_config(link
);
566 mgslpc_add_device(info
);
571 /* Card has been inserted.
574 #define CS_CHECK(fn, ret) \
575 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
577 static int mgslpc_config(struct pcmcia_device
*link
)
579 MGSLPC_INFO
*info
= link
->priv
;
582 int last_fn
, last_ret
;
584 cistpl_cftable_entry_t dflt
= { 0 };
585 cistpl_cftable_entry_t
*cfg
;
587 if (debug_level
>= DEBUG_LEVEL_INFO
)
588 printk("mgslpc_config(0x%p)\n", link
);
590 tuple
.Attributes
= 0;
591 tuple
.TupleData
= buf
;
592 tuple
.TupleDataMax
= sizeof(buf
);
593 tuple
.TupleOffset
= 0;
595 /* get CIS configuration entry */
597 tuple
.DesiredTuple
= CISTPL_CFTABLE_ENTRY
;
598 CS_CHECK(GetFirstTuple
, pcmcia_get_first_tuple(link
, &tuple
));
600 cfg
= &(parse
.cftable_entry
);
601 CS_CHECK(GetTupleData
, pcmcia_get_tuple_data(link
, &tuple
));
602 CS_CHECK(ParseTuple
, pcmcia_parse_tuple(&tuple
, &parse
));
604 if (cfg
->flags
& CISTPL_CFTABLE_DEFAULT
) dflt
= *cfg
;
608 link
->conf
.ConfigIndex
= cfg
->index
;
609 link
->conf
.Attributes
|= CONF_ENABLE_IRQ
;
611 /* IO window settings */
612 link
->io
.NumPorts1
= 0;
613 if ((cfg
->io
.nwin
> 0) || (dflt
.io
.nwin
> 0)) {
614 cistpl_io_t
*io
= (cfg
->io
.nwin
) ? &cfg
->io
: &dflt
.io
;
615 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_AUTO
;
616 if (!(io
->flags
& CISTPL_IO_8BIT
))
617 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_16
;
618 if (!(io
->flags
& CISTPL_IO_16BIT
))
619 link
->io
.Attributes1
= IO_DATA_PATH_WIDTH_8
;
620 link
->io
.IOAddrLines
= io
->flags
& CISTPL_IO_LINES_MASK
;
621 link
->io
.BasePort1
= io
->win
[0].base
;
622 link
->io
.NumPorts1
= io
->win
[0].len
;
623 CS_CHECK(RequestIO
, pcmcia_request_io(link
, &link
->io
));
626 link
->conf
.Attributes
= CONF_ENABLE_IRQ
;
627 link
->conf
.IntType
= INT_MEMORY_AND_IO
;
628 link
->conf
.ConfigIndex
= 8;
629 link
->conf
.Present
= PRESENT_OPTION
;
631 link
->irq
.Attributes
|= IRQ_HANDLE_PRESENT
;
632 link
->irq
.Handler
= mgslpc_isr
;
633 link
->irq
.Instance
= info
;
634 CS_CHECK(RequestIRQ
, pcmcia_request_irq(link
, &link
->irq
));
636 CS_CHECK(RequestConfiguration
, pcmcia_request_configuration(link
, &link
->conf
));
638 info
->io_base
= link
->io
.BasePort1
;
639 info
->irq_level
= link
->irq
.AssignedIRQ
;
641 /* add to linked list of devices */
642 sprintf(info
->node
.dev_name
, "mgslpc0");
643 info
->node
.major
= info
->node
.minor
= 0;
644 link
->dev_node
= &info
->node
;
646 printk(KERN_INFO
"%s: index 0x%02x:",
647 info
->node
.dev_name
, link
->conf
.ConfigIndex
);
648 if (link
->conf
.Attributes
& CONF_ENABLE_IRQ
)
649 printk(", irq %d", link
->irq
.AssignedIRQ
);
650 if (link
->io
.NumPorts1
)
651 printk(", io 0x%04x-0x%04x", link
->io
.BasePort1
,
652 link
->io
.BasePort1
+link
->io
.NumPorts1
-1);
657 cs_error(link
, last_fn
, last_ret
);
658 mgslpc_release((u_long
)link
);
662 /* Card has been removed.
663 * Unregister device and release PCMCIA configuration.
664 * If device is open, postpone until it is closed.
666 static void mgslpc_release(u_long arg
)
668 struct pcmcia_device
*link
= (struct pcmcia_device
*)arg
;
670 if (debug_level
>= DEBUG_LEVEL_INFO
)
671 printk("mgslpc_release(0x%p)\n", link
);
673 pcmcia_disable_device(link
);
676 static void mgslpc_detach(struct pcmcia_device
*link
)
678 if (debug_level
>= DEBUG_LEVEL_INFO
)
679 printk("mgslpc_detach(0x%p)\n", link
);
681 ((MGSLPC_INFO
*)link
->priv
)->stop
= 1;
682 mgslpc_release((u_long
)link
);
684 mgslpc_remove_device((MGSLPC_INFO
*)link
->priv
);
687 static int mgslpc_suspend(struct pcmcia_device
*link
)
689 MGSLPC_INFO
*info
= link
->priv
;
696 static int mgslpc_resume(struct pcmcia_device
*link
)
698 MGSLPC_INFO
*info
= link
->priv
;
706 static inline bool mgslpc_paranoia_check(MGSLPC_INFO
*info
,
707 char *name
, const char *routine
)
709 #ifdef MGSLPC_PARANOIA_CHECK
710 static const char *badmagic
=
711 "Warning: bad magic number for mgsl struct (%s) in %s\n";
712 static const char *badinfo
=
713 "Warning: null mgslpc_info for (%s) in %s\n";
716 printk(badinfo
, name
, routine
);
719 if (info
->magic
!= MGSLPC_MAGIC
) {
720 printk(badmagic
, name
, routine
);
731 #define CMD_RXFIFO BIT7 // release current rx FIFO
732 #define CMD_RXRESET BIT6 // receiver reset
733 #define CMD_RXFIFO_READ BIT5
734 #define CMD_START_TIMER BIT4
735 #define CMD_TXFIFO BIT3 // release current tx FIFO
736 #define CMD_TXEOM BIT1 // transmit end message
737 #define CMD_TXRESET BIT0 // transmit reset
739 static bool wait_command_complete(MGSLPC_INFO
*info
, unsigned char channel
)
742 /* wait for command completion */
743 while (read_reg(info
, (unsigned char)(channel
+STAR
)) & BIT2
) {
751 static void issue_command(MGSLPC_INFO
*info
, unsigned char channel
, unsigned char cmd
)
753 wait_command_complete(info
, channel
);
754 write_reg(info
, (unsigned char) (channel
+ CMDR
), cmd
);
757 static void tx_pause(struct tty_struct
*tty
)
759 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
762 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_pause"))
764 if (debug_level
>= DEBUG_LEVEL_INFO
)
765 printk("tx_pause(%s)\n",info
->device_name
);
767 spin_lock_irqsave(&info
->lock
,flags
);
768 if (info
->tx_enabled
)
770 spin_unlock_irqrestore(&info
->lock
,flags
);
773 static void tx_release(struct tty_struct
*tty
)
775 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
778 if (mgslpc_paranoia_check(info
, tty
->name
, "tx_release"))
780 if (debug_level
>= DEBUG_LEVEL_INFO
)
781 printk("tx_release(%s)\n",info
->device_name
);
783 spin_lock_irqsave(&info
->lock
,flags
);
784 if (!info
->tx_enabled
)
786 spin_unlock_irqrestore(&info
->lock
,flags
);
789 /* Return next bottom half action to perform.
790 * or 0 if nothing to do.
792 static int bh_action(MGSLPC_INFO
*info
)
797 spin_lock_irqsave(&info
->lock
,flags
);
799 if (info
->pending_bh
& BH_RECEIVE
) {
800 info
->pending_bh
&= ~BH_RECEIVE
;
802 } else if (info
->pending_bh
& BH_TRANSMIT
) {
803 info
->pending_bh
&= ~BH_TRANSMIT
;
805 } else if (info
->pending_bh
& BH_STATUS
) {
806 info
->pending_bh
&= ~BH_STATUS
;
811 /* Mark BH routine as complete */
812 info
->bh_running
= false;
813 info
->bh_requested
= false;
816 spin_unlock_irqrestore(&info
->lock
,flags
);
821 static void bh_handler(struct work_struct
*work
)
823 MGSLPC_INFO
*info
= container_of(work
, MGSLPC_INFO
, task
);
824 struct tty_struct
*tty
;
830 if (debug_level
>= DEBUG_LEVEL_BH
)
831 printk( "%s(%d):bh_handler(%s) entry\n",
832 __FILE__
,__LINE__
,info
->device_name
);
834 info
->bh_running
= true;
835 tty
= tty_port_tty_get(&info
->port
);
837 while((action
= bh_action(info
)) != 0) {
839 /* Process work item */
840 if ( debug_level
>= DEBUG_LEVEL_BH
)
841 printk( "%s(%d):bh_handler() work item action=%d\n",
842 __FILE__
,__LINE__
,action
);
847 while(rx_get_frame(info
, tty
));
850 bh_transmit(info
, tty
);
856 /* unknown work item ID */
857 printk("Unknown work item ID=%08X!\n", action
);
863 if (debug_level
>= DEBUG_LEVEL_BH
)
864 printk( "%s(%d):bh_handler(%s) exit\n",
865 __FILE__
,__LINE__
,info
->device_name
);
868 static void bh_transmit(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
870 if (debug_level
>= DEBUG_LEVEL_BH
)
871 printk("bh_transmit() entry on %s\n", info
->device_name
);
877 static void bh_status(MGSLPC_INFO
*info
)
879 info
->ri_chkcount
= 0;
880 info
->dsr_chkcount
= 0;
881 info
->dcd_chkcount
= 0;
882 info
->cts_chkcount
= 0;
885 /* eom: non-zero = end of frame */
886 static void rx_ready_hdlc(MGSLPC_INFO
*info
, int eom
)
888 unsigned char data
[2];
889 unsigned char fifo_count
, read_count
, i
;
890 RXBUF
*buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_put
* info
->rx_buf_size
));
892 if (debug_level
>= DEBUG_LEVEL_ISR
)
893 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__
,__LINE__
,eom
);
895 if (!info
->rx_enabled
)
898 if (info
->rx_frame_count
>= info
->rx_buf_count
) {
899 /* no more free buffers */
900 issue_command(info
, CHA
, CMD_RXRESET
);
901 info
->pending_bh
|= BH_RECEIVE
;
902 info
->rx_overflow
= true;
903 info
->icount
.buf_overrun
++;
908 /* end of frame, get FIFO count from RBCL register */
909 if (!(fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f)))
915 if (fifo_count
== 1) {
917 data
[0] = read_reg(info
, CHA
+ RXFIFO
);
920 *((unsigned short *) data
) = read_reg16(info
, CHA
+ RXFIFO
);
922 fifo_count
-= read_count
;
923 if (!fifo_count
&& eom
)
924 buf
->status
= data
[--read_count
];
926 for (i
= 0; i
< read_count
; i
++) {
927 if (buf
->count
>= info
->max_frame_size
) {
928 /* frame too large, reset receiver and reset current buffer */
929 issue_command(info
, CHA
, CMD_RXRESET
);
933 *(buf
->data
+ buf
->count
) = data
[i
];
936 } while (fifo_count
);
939 info
->pending_bh
|= BH_RECEIVE
;
940 info
->rx_frame_count
++;
942 if (info
->rx_put
>= info
->rx_buf_count
)
945 issue_command(info
, CHA
, CMD_RXFIFO
);
948 static void rx_ready_async(MGSLPC_INFO
*info
, int tcd
, struct tty_struct
*tty
)
950 unsigned char data
, status
, flag
;
953 struct mgsl_icount
*icount
= &info
->icount
;
956 /* early termination, get FIFO count from RBCL register */
957 fifo_count
= (unsigned char)(read_reg(info
, CHA
+RBCL
) & 0x1f);
959 /* Zero fifo count could mean 0 or 32 bytes available.
960 * If BIT5 of STAR is set then at least 1 byte is available.
962 if (!fifo_count
&& (read_reg(info
,CHA
+STAR
) & BIT5
))
967 tty_buffer_request_room(tty
, fifo_count
);
968 /* Flush received async data to receive data buffer. */
970 data
= read_reg(info
, CHA
+ RXFIFO
);
971 status
= read_reg(info
, CHA
+ RXFIFO
);
977 // if no frameing/crc error then save data
979 // BIT6:framing error
981 if (status
& (BIT7
+ BIT6
)) {
987 /* discard char if tty control flags say so */
988 if (status
& info
->ignore_status_mask
)
991 status
&= info
->read_status_mask
;
995 else if (status
& BIT6
)
998 work
+= tty_insert_flip_char(tty
, data
, flag
);
1000 issue_command(info
, CHA
, CMD_RXFIFO
);
1002 if (debug_level
>= DEBUG_LEVEL_ISR
) {
1003 printk("%s(%d):rx_ready_async",
1005 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1006 __FILE__
,__LINE__
,icount
->rx
,icount
->brk
,
1007 icount
->parity
,icount
->frame
,icount
->overrun
);
1011 tty_flip_buffer_push(tty
);
1015 static void tx_done(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1017 if (!info
->tx_active
)
1020 info
->tx_active
= false;
1021 info
->tx_aborting
= false;
1023 if (info
->params
.mode
== MGSL_MODE_ASYNC
)
1026 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
1027 del_timer(&info
->tx_timer
);
1029 if (info
->drop_rts_on_tx_done
) {
1031 if (info
->serial_signals
& SerialSignal_RTS
) {
1032 info
->serial_signals
&= ~SerialSignal_RTS
;
1035 info
->drop_rts_on_tx_done
= false;
1038 #if SYNCLINK_GENERIC_HDLC
1040 hdlcdev_tx_done(info
);
1044 if (tty
->stopped
|| tty
->hw_stopped
) {
1048 info
->pending_bh
|= BH_TRANSMIT
;
1052 static void tx_ready(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1054 unsigned char fifo_count
= 32;
1057 if (debug_level
>= DEBUG_LEVEL_ISR
)
1058 printk("%s(%d):tx_ready(%s)\n", __FILE__
,__LINE__
,info
->device_name
);
1060 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
1061 if (!info
->tx_active
)
1064 if (tty
->stopped
|| tty
->hw_stopped
) {
1068 if (!info
->tx_count
)
1069 info
->tx_active
= false;
1072 if (!info
->tx_count
)
1075 while (info
->tx_count
&& fifo_count
) {
1076 c
= min(2, min_t(int, fifo_count
, min(info
->tx_count
, TXBUFSIZE
- info
->tx_get
)));
1079 write_reg(info
, CHA
+ TXFIFO
, *(info
->tx_buf
+ info
->tx_get
));
1081 write_reg16(info
, CHA
+ TXFIFO
,
1082 *((unsigned short*)(info
->tx_buf
+ info
->tx_get
)));
1084 info
->tx_count
-= c
;
1085 info
->tx_get
= (info
->tx_get
+ c
) & (TXBUFSIZE
- 1);
1089 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
1090 if (info
->tx_count
< WAKEUP_CHARS
)
1091 info
->pending_bh
|= BH_TRANSMIT
;
1092 issue_command(info
, CHA
, CMD_TXFIFO
);
1095 issue_command(info
, CHA
, CMD_TXFIFO
);
1097 issue_command(info
, CHA
, CMD_TXFIFO
+ CMD_TXEOM
);
1101 static void cts_change(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1104 if ((info
->cts_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1105 irq_disable(info
, CHB
, IRQ_CTS
);
1107 if (info
->serial_signals
& SerialSignal_CTS
)
1108 info
->input_signal_events
.cts_up
++;
1110 info
->input_signal_events
.cts_down
++;
1111 wake_up_interruptible(&info
->status_event_wait_q
);
1112 wake_up_interruptible(&info
->event_wait_q
);
1114 if (info
->port
.flags
& ASYNC_CTS_FLOW
) {
1115 if (tty
->hw_stopped
) {
1116 if (info
->serial_signals
& SerialSignal_CTS
) {
1117 if (debug_level
>= DEBUG_LEVEL_ISR
)
1118 printk("CTS tx start...");
1120 tty
->hw_stopped
= 0;
1121 tx_start(info
, tty
);
1122 info
->pending_bh
|= BH_TRANSMIT
;
1126 if (!(info
->serial_signals
& SerialSignal_CTS
)) {
1127 if (debug_level
>= DEBUG_LEVEL_ISR
)
1128 printk("CTS tx stop...");
1130 tty
->hw_stopped
= 1;
1135 info
->pending_bh
|= BH_STATUS
;
1138 static void dcd_change(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
1141 if ((info
->dcd_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1142 irq_disable(info
, CHB
, IRQ_DCD
);
1144 if (info
->serial_signals
& SerialSignal_DCD
) {
1145 info
->input_signal_events
.dcd_up
++;
1148 info
->input_signal_events
.dcd_down
++;
1149 #if SYNCLINK_GENERIC_HDLC
1150 if (info
->netcount
) {
1151 if (info
->serial_signals
& SerialSignal_DCD
)
1152 netif_carrier_on(info
->netdev
);
1154 netif_carrier_off(info
->netdev
);
1157 wake_up_interruptible(&info
->status_event_wait_q
);
1158 wake_up_interruptible(&info
->event_wait_q
);
1160 if (info
->port
.flags
& ASYNC_CHECK_CD
) {
1161 if (debug_level
>= DEBUG_LEVEL_ISR
)
1162 printk("%s CD now %s...", info
->device_name
,
1163 (info
->serial_signals
& SerialSignal_DCD
) ? "on" : "off");
1164 if (info
->serial_signals
& SerialSignal_DCD
)
1165 wake_up_interruptible(&info
->port
.open_wait
);
1167 if (debug_level
>= DEBUG_LEVEL_ISR
)
1168 printk("doing serial hangup...");
1173 info
->pending_bh
|= BH_STATUS
;
1176 static void dsr_change(MGSLPC_INFO
*info
)
1179 if ((info
->dsr_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1180 port_irq_disable(info
, PVR_DSR
);
1182 if (info
->serial_signals
& SerialSignal_DSR
)
1183 info
->input_signal_events
.dsr_up
++;
1185 info
->input_signal_events
.dsr_down
++;
1186 wake_up_interruptible(&info
->status_event_wait_q
);
1187 wake_up_interruptible(&info
->event_wait_q
);
1188 info
->pending_bh
|= BH_STATUS
;
1191 static void ri_change(MGSLPC_INFO
*info
)
1194 if ((info
->ri_chkcount
)++ >= IO_PIN_SHUTDOWN_LIMIT
)
1195 port_irq_disable(info
, PVR_RI
);
1197 if (info
->serial_signals
& SerialSignal_RI
)
1198 info
->input_signal_events
.ri_up
++;
1200 info
->input_signal_events
.ri_down
++;
1201 wake_up_interruptible(&info
->status_event_wait_q
);
1202 wake_up_interruptible(&info
->event_wait_q
);
1203 info
->pending_bh
|= BH_STATUS
;
1206 /* Interrupt service routine entry point.
1210 * irq interrupt number that caused interrupt
1211 * dev_id device ID supplied during interrupt registration
1213 static irqreturn_t
mgslpc_isr(int dummy
, void *dev_id
)
1215 MGSLPC_INFO
*info
= dev_id
;
1216 struct tty_struct
*tty
;
1218 unsigned char gis
, pis
;
1221 if (debug_level
>= DEBUG_LEVEL_ISR
)
1222 printk("mgslpc_isr(%d) entry.\n", info
->irq_level
);
1224 if (!(info
->p_dev
->_locked
))
1227 tty
= tty_port_tty_get(&info
->port
);
1229 spin_lock(&info
->lock
);
1231 while ((gis
= read_reg(info
, CHA
+ GIS
))) {
1232 if (debug_level
>= DEBUG_LEVEL_ISR
)
1233 printk("mgslpc_isr %s gis=%04X\n", info
->device_name
,gis
);
1235 if ((gis
& 0x70) || count
> 1000) {
1236 printk("synclink_cs:hardware failed or ejected\n");
1241 if (gis
& (BIT1
+ BIT0
)) {
1242 isr
= read_reg16(info
, CHB
+ ISR
);
1244 dcd_change(info
, tty
);
1246 cts_change(info
, tty
);
1248 if (gis
& (BIT3
+ BIT2
))
1250 isr
= read_reg16(info
, CHA
+ ISR
);
1251 if (isr
& IRQ_TIMER
) {
1252 info
->irq_occurred
= true;
1253 irq_disable(info
, CHA
, IRQ_TIMER
);
1257 if (isr
& IRQ_EXITHUNT
) {
1258 info
->icount
.exithunt
++;
1259 wake_up_interruptible(&info
->event_wait_q
);
1261 if (isr
& IRQ_BREAK_ON
) {
1263 if (info
->port
.flags
& ASYNC_SAK
)
1266 if (isr
& IRQ_RXTIME
) {
1267 issue_command(info
, CHA
, CMD_RXFIFO_READ
);
1269 if (isr
& (IRQ_RXEOM
+ IRQ_RXFIFO
)) {
1270 if (info
->params
.mode
== MGSL_MODE_HDLC
)
1271 rx_ready_hdlc(info
, isr
& IRQ_RXEOM
);
1273 rx_ready_async(info
, isr
& IRQ_RXEOM
, tty
);
1277 if (isr
& IRQ_UNDERRUN
) {
1278 if (info
->tx_aborting
)
1279 info
->icount
.txabort
++;
1281 info
->icount
.txunder
++;
1284 else if (isr
& IRQ_ALLSENT
) {
1285 info
->icount
.txok
++;
1288 else if (isr
& IRQ_TXFIFO
)
1289 tx_ready(info
, tty
);
1292 pis
= read_reg(info
, CHA
+ PIS
);
1300 /* Request bottom half processing if there's something
1301 * for it to do and the bh is not already running
1304 if (info
->pending_bh
&& !info
->bh_running
&& !info
->bh_requested
) {
1305 if ( debug_level
>= DEBUG_LEVEL_ISR
)
1306 printk("%s(%d):%s queueing bh task.\n",
1307 __FILE__
,__LINE__
,info
->device_name
);
1308 schedule_work(&info
->task
);
1309 info
->bh_requested
= true;
1312 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
, struct tty_struct
*tty
)
1328 if (debug_level
>= DEBUG_LEVEL_INFO
)
1329 printk("%s(%d):startup(%s)\n",__FILE__
,__LINE__
,info
->device_name
);
1331 if (info
->port
.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
) && tty
)
1359 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1360 release_resources(info
);
1364 /* program hardware for current parameters */
1365 mgslpc_change_params(info
, tty
);
1368 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
1370 info
->port
.flags
|= ASYNC_INITIALIZED
;
1375 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1377 static void shutdown(MGSLPC_INFO
* info
, struct tty_struct
*tty
)
1379 unsigned long flags
;
1381 if (!(info
->port
.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 (!tty
|| 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
, &tty
->flags
);
1420 info
->port
.flags
&= ~ASYNC_INITIALIZED
;
1423 static void mgslpc_program_hw(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
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
|| (tty
&& (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
, struct tty_struct
*tty
)
1462 if (!tty
|| !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
= 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(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
->port
.flags
|= ASYNC_CTS_FLOW
;
1528 info
->port
.flags
&= ~ASYNC_CTS_FLOW
;
1531 info
->port
.flags
&= ~ASYNC_CHECK_CD
;
1533 info
->port
.flags
|= ASYNC_CHECK_CD
;
1535 /* process tty input control flags */
1537 info
->read_status_mask
= 0;
1539 info
->read_status_mask
|= BIT7
| BIT6
;
1541 info
->ignore_status_mask
|= BIT7
| BIT6
;
1543 mgslpc_program_hw(info
, tty
);
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
)
1603 tx_start(info
, tty
);
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
)
1665 tx_start(info
, tty
);
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
)
1770 tx_start(info
, tty
);
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
, struct tty_struct
*tty
)
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
, tty
);
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
, struct tty_struct
*tty
)
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
)
1960 tx_start(info
, tty
);
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 int 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
);
2254 /* Service an IOCTL request
2258 * tty pointer to tty instance data
2259 * file pointer to associated file object for device
2260 * cmd IOCTL command code
2261 * arg command argument/context
2263 * Return Value: 0 if success, otherwise error code
2265 static int mgslpc_ioctl(struct tty_struct
*tty
, struct file
* file
,
2266 unsigned int cmd
, unsigned long arg
)
2268 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2270 struct mgsl_icount cnow
; /* kernel counter temps */
2271 struct serial_icounter_struct __user
*p_cuser
; /* user space */
2272 void __user
*argp
= (void __user
*)arg
;
2273 unsigned long flags
;
2275 if (debug_level
>= DEBUG_LEVEL_INFO
)
2276 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__
,__LINE__
,
2277 info
->device_name
, cmd
);
2279 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_ioctl"))
2282 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
2283 (cmd
!= TIOCMIWAIT
) && (cmd
!= TIOCGICOUNT
)) {
2284 if (tty
->flags
& (1 << TTY_IO_ERROR
))
2289 case MGSL_IOCGPARAMS
:
2290 return get_params(info
, argp
);
2291 case MGSL_IOCSPARAMS
:
2292 return set_params(info
, argp
, tty
);
2293 case MGSL_IOCGTXIDLE
:
2294 return get_txidle(info
, argp
);
2295 case MGSL_IOCSTXIDLE
:
2296 return set_txidle(info
, (int)arg
);
2298 return get_interface(info
, argp
);
2300 return set_interface(info
,(int)arg
);
2301 case MGSL_IOCTXENABLE
:
2302 return set_txenable(info
,(int)arg
, tty
);
2303 case MGSL_IOCRXENABLE
:
2304 return set_rxenable(info
,(int)arg
);
2305 case MGSL_IOCTXABORT
:
2306 return tx_abort(info
);
2307 case MGSL_IOCGSTATS
:
2308 return get_stats(info
, argp
);
2309 case MGSL_IOCWAITEVENT
:
2310 return wait_events(info
, argp
);
2312 return modem_input_wait(info
,(int)arg
);
2314 spin_lock_irqsave(&info
->lock
,flags
);
2315 cnow
= info
->icount
;
2316 spin_unlock_irqrestore(&info
->lock
,flags
);
2318 PUT_USER(error
,cnow
.cts
, &p_cuser
->cts
);
2319 if (error
) return error
;
2320 PUT_USER(error
,cnow
.dsr
, &p_cuser
->dsr
);
2321 if (error
) return error
;
2322 PUT_USER(error
,cnow
.rng
, &p_cuser
->rng
);
2323 if (error
) return error
;
2324 PUT_USER(error
,cnow
.dcd
, &p_cuser
->dcd
);
2325 if (error
) return error
;
2326 PUT_USER(error
,cnow
.rx
, &p_cuser
->rx
);
2327 if (error
) return error
;
2328 PUT_USER(error
,cnow
.tx
, &p_cuser
->tx
);
2329 if (error
) return error
;
2330 PUT_USER(error
,cnow
.frame
, &p_cuser
->frame
);
2331 if (error
) return error
;
2332 PUT_USER(error
,cnow
.overrun
, &p_cuser
->overrun
);
2333 if (error
) return error
;
2334 PUT_USER(error
,cnow
.parity
, &p_cuser
->parity
);
2335 if (error
) return error
;
2336 PUT_USER(error
,cnow
.brk
, &p_cuser
->brk
);
2337 if (error
) return error
;
2338 PUT_USER(error
,cnow
.buf_overrun
, &p_cuser
->buf_overrun
);
2339 if (error
) return error
;
2342 return -ENOIOCTLCMD
;
2347 /* Set new termios settings
2351 * tty pointer to tty structure
2352 * termios pointer to buffer to hold returned old termios
2354 static void mgslpc_set_termios(struct tty_struct
*tty
, struct ktermios
*old_termios
)
2356 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)tty
->driver_data
;
2357 unsigned long flags
;
2359 if (debug_level
>= DEBUG_LEVEL_INFO
)
2360 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__
,__LINE__
,
2361 tty
->driver
->name
);
2363 /* just return if nothing has changed */
2364 if ((tty
->termios
->c_cflag
== old_termios
->c_cflag
)
2365 && (RELEVANT_IFLAG(tty
->termios
->c_iflag
)
2366 == RELEVANT_IFLAG(old_termios
->c_iflag
)))
2369 mgslpc_change_params(info
, tty
);
2371 /* Handle transition to B0 status */
2372 if (old_termios
->c_cflag
& CBAUD
&&
2373 !(tty
->termios
->c_cflag
& CBAUD
)) {
2374 info
->serial_signals
&= ~(SerialSignal_RTS
+ SerialSignal_DTR
);
2375 spin_lock_irqsave(&info
->lock
,flags
);
2377 spin_unlock_irqrestore(&info
->lock
,flags
);
2380 /* Handle transition away from B0 status */
2381 if (!(old_termios
->c_cflag
& CBAUD
) &&
2382 tty
->termios
->c_cflag
& CBAUD
) {
2383 info
->serial_signals
|= SerialSignal_DTR
;
2384 if (!(tty
->termios
->c_cflag
& CRTSCTS
) ||
2385 !test_bit(TTY_THROTTLED
, &tty
->flags
)) {
2386 info
->serial_signals
|= SerialSignal_RTS
;
2388 spin_lock_irqsave(&info
->lock
,flags
);
2390 spin_unlock_irqrestore(&info
->lock
,flags
);
2393 /* Handle turning off CRTSCTS */
2394 if (old_termios
->c_cflag
& CRTSCTS
&&
2395 !(tty
->termios
->c_cflag
& CRTSCTS
)) {
2396 tty
->hw_stopped
= 0;
2401 static void mgslpc_close(struct tty_struct
*tty
, struct file
* filp
)
2403 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2404 struct tty_port
*port
= &info
->port
;
2406 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_close"))
2409 if (debug_level
>= DEBUG_LEVEL_INFO
)
2410 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2411 __FILE__
,__LINE__
, info
->device_name
, port
->count
);
2413 WARN_ON(!port
->count
);
2415 if (tty_port_close_start(port
, tty
, filp
) == 0)
2418 if (port
->flags
& ASYNC_INITIALIZED
)
2419 mgslpc_wait_until_sent(tty
, info
->timeout
);
2421 mgslpc_flush_buffer(tty
);
2423 tty_ldisc_flush(tty
);
2424 shutdown(info
, tty
);
2426 tty_port_close_end(port
, tty
);
2427 tty_port_tty_set(port
, NULL
);
2429 if (debug_level
>= DEBUG_LEVEL_INFO
)
2430 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__
,__LINE__
,
2431 tty
->driver
->name
, port
->count
);
2434 /* Wait until the transmitter is empty.
2436 static void mgslpc_wait_until_sent(struct tty_struct
*tty
, int timeout
)
2438 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2439 unsigned long orig_jiffies
, char_time
;
2444 if (debug_level
>= DEBUG_LEVEL_INFO
)
2445 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2446 __FILE__
,__LINE__
, info
->device_name
);
2448 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_wait_until_sent"))
2451 if (!(info
->port
.flags
& ASYNC_INITIALIZED
))
2454 orig_jiffies
= jiffies
;
2456 /* Set check interval to 1/5 of estimated time to
2457 * send a character, and make it at least 1. The check
2458 * interval should also be less than the timeout.
2459 * Note: use tight timings here to satisfy the NIST-PCTS.
2462 if ( info
->params
.data_rate
) {
2463 char_time
= info
->timeout
/(32 * 5);
2470 char_time
= min_t(unsigned long, char_time
, timeout
);
2472 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2473 while (info
->tx_active
) {
2474 msleep_interruptible(jiffies_to_msecs(char_time
));
2475 if (signal_pending(current
))
2477 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2481 while ((info
->tx_count
|| info
->tx_active
) &&
2483 msleep_interruptible(jiffies_to_msecs(char_time
));
2484 if (signal_pending(current
))
2486 if (timeout
&& time_after(jiffies
, orig_jiffies
+ timeout
))
2492 if (debug_level
>= DEBUG_LEVEL_INFO
)
2493 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2494 __FILE__
,__LINE__
, info
->device_name
);
2497 /* Called by tty_hangup() when a hangup is signaled.
2498 * This is the same as closing all open files for the port.
2500 static void mgslpc_hangup(struct tty_struct
*tty
)
2502 MGSLPC_INFO
* info
= (MGSLPC_INFO
*)tty
->driver_data
;
2504 if (debug_level
>= DEBUG_LEVEL_INFO
)
2505 printk("%s(%d):mgslpc_hangup(%s)\n",
2506 __FILE__
,__LINE__
, info
->device_name
);
2508 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_hangup"))
2511 mgslpc_flush_buffer(tty
);
2512 shutdown(info
, tty
);
2513 tty_port_hangup(&info
->port
);
2516 static int carrier_raised(struct tty_port
*port
)
2518 MGSLPC_INFO
*info
= container_of(port
, MGSLPC_INFO
, port
);
2519 unsigned long flags
;
2521 spin_lock_irqsave(&info
->lock
,flags
);
2523 spin_unlock_irqrestore(&info
->lock
,flags
);
2525 if (info
->serial_signals
& SerialSignal_DCD
)
2530 static void raise_dtr_rts(struct tty_port
*port
)
2532 MGSLPC_INFO
*info
= container_of(port
, MGSLPC_INFO
, port
);
2533 unsigned long flags
;
2535 spin_lock_irqsave(&info
->lock
,flags
);
2536 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
2538 spin_unlock_irqrestore(&info
->lock
,flags
);
2542 static int mgslpc_open(struct tty_struct
*tty
, struct file
* filp
)
2545 struct tty_port
*port
;
2547 unsigned long flags
;
2549 /* verify range of specified line number */
2551 if ((line
< 0) || (line
>= mgslpc_device_count
)) {
2552 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2553 __FILE__
,__LINE__
,line
);
2557 /* find the info structure for the specified line */
2558 info
= mgslpc_device_list
;
2559 while(info
&& info
->line
!= line
)
2560 info
= info
->next_device
;
2561 if (mgslpc_paranoia_check(info
, tty
->name
, "mgslpc_open"))
2565 tty
->driver_data
= info
;
2566 tty_port_tty_set(port
, tty
);
2568 if (debug_level
>= DEBUG_LEVEL_INFO
)
2569 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2570 __FILE__
,__LINE__
,tty
->driver
->name
, port
->count
);
2572 /* If port is closing, signal caller to try again */
2573 if (tty_hung_up_p(filp
) || port
->flags
& ASYNC_CLOSING
){
2574 if (port
->flags
& ASYNC_CLOSING
)
2575 interruptible_sleep_on(&port
->close_wait
);
2576 retval
= ((port
->flags
& ASYNC_HUP_NOTIFY
) ?
2577 -EAGAIN
: -ERESTARTSYS
);
2581 tty
->low_latency
= (port
->flags
& ASYNC_LOW_LATENCY
) ? 1 : 0;
2583 spin_lock_irqsave(&info
->netlock
, flags
);
2584 if (info
->netcount
) {
2586 spin_unlock_irqrestore(&info
->netlock
, flags
);
2589 spin_lock(&port
->lock
);
2591 spin_unlock(&port
->lock
);
2592 spin_unlock_irqrestore(&info
->netlock
, flags
);
2594 if (port
->count
== 1) {
2595 /* 1st open on this device, init hardware */
2596 retval
= startup(info
, tty
);
2601 retval
= tty_port_block_til_ready(&info
->port
, tty
, filp
);
2603 if (debug_level
>= DEBUG_LEVEL_INFO
)
2604 printk("%s(%d):block_til_ready(%s) returned %d\n",
2605 __FILE__
,__LINE__
, info
->device_name
, retval
);
2609 if (debug_level
>= DEBUG_LEVEL_INFO
)
2610 printk("%s(%d):mgslpc_open(%s) success\n",
2611 __FILE__
,__LINE__
, info
->device_name
);
2619 * /proc fs routines....
2622 static inline int line_info(char *buf
, MGSLPC_INFO
*info
)
2626 unsigned long flags
;
2628 ret
= sprintf(buf
, "%s:io:%04X irq:%d",
2629 info
->device_name
, info
->io_base
, info
->irq_level
);
2631 /* output current serial signal states */
2632 spin_lock_irqsave(&info
->lock
,flags
);
2634 spin_unlock_irqrestore(&info
->lock
,flags
);
2638 if (info
->serial_signals
& SerialSignal_RTS
)
2639 strcat(stat_buf
, "|RTS");
2640 if (info
->serial_signals
& SerialSignal_CTS
)
2641 strcat(stat_buf
, "|CTS");
2642 if (info
->serial_signals
& SerialSignal_DTR
)
2643 strcat(stat_buf
, "|DTR");
2644 if (info
->serial_signals
& SerialSignal_DSR
)
2645 strcat(stat_buf
, "|DSR");
2646 if (info
->serial_signals
& SerialSignal_DCD
)
2647 strcat(stat_buf
, "|CD");
2648 if (info
->serial_signals
& SerialSignal_RI
)
2649 strcat(stat_buf
, "|RI");
2651 if (info
->params
.mode
== MGSL_MODE_HDLC
) {
2652 ret
+= sprintf(buf
+ret
, " HDLC txok:%d rxok:%d",
2653 info
->icount
.txok
, info
->icount
.rxok
);
2654 if (info
->icount
.txunder
)
2655 ret
+= sprintf(buf
+ret
, " txunder:%d", info
->icount
.txunder
);
2656 if (info
->icount
.txabort
)
2657 ret
+= sprintf(buf
+ret
, " txabort:%d", info
->icount
.txabort
);
2658 if (info
->icount
.rxshort
)
2659 ret
+= sprintf(buf
+ret
, " rxshort:%d", info
->icount
.rxshort
);
2660 if (info
->icount
.rxlong
)
2661 ret
+= sprintf(buf
+ret
, " rxlong:%d", info
->icount
.rxlong
);
2662 if (info
->icount
.rxover
)
2663 ret
+= sprintf(buf
+ret
, " rxover:%d", info
->icount
.rxover
);
2664 if (info
->icount
.rxcrc
)
2665 ret
+= sprintf(buf
+ret
, " rxcrc:%d", info
->icount
.rxcrc
);
2667 ret
+= sprintf(buf
+ret
, " ASYNC tx:%d rx:%d",
2668 info
->icount
.tx
, info
->icount
.rx
);
2669 if (info
->icount
.frame
)
2670 ret
+= sprintf(buf
+ret
, " fe:%d", info
->icount
.frame
);
2671 if (info
->icount
.parity
)
2672 ret
+= sprintf(buf
+ret
, " pe:%d", info
->icount
.parity
);
2673 if (info
->icount
.brk
)
2674 ret
+= sprintf(buf
+ret
, " brk:%d", info
->icount
.brk
);
2675 if (info
->icount
.overrun
)
2676 ret
+= sprintf(buf
+ret
, " oe:%d", info
->icount
.overrun
);
2679 /* Append serial signal status to end */
2680 ret
+= sprintf(buf
+ret
, " %s\n", stat_buf
+1);
2682 ret
+= sprintf(buf
+ret
, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2683 info
->tx_active
,info
->bh_requested
,info
->bh_running
,
2689 /* Called to print information about devices
2691 static int mgslpc_read_proc(char *page
, char **start
, off_t off
, int count
,
2692 int *eof
, void *data
)
2698 len
+= sprintf(page
, "synclink driver:%s\n", driver_version
);
2700 info
= mgslpc_device_list
;
2702 l
= line_info(page
+ len
, info
);
2704 if (len
+begin
> off
+count
)
2706 if (len
+begin
< off
) {
2710 info
= info
->next_device
;
2715 if (off
>= len
+begin
)
2717 *start
= page
+ (off
-begin
);
2718 return ((count
< begin
+len
-off
) ? count
: begin
+len
-off
);
2721 static int rx_alloc_buffers(MGSLPC_INFO
*info
)
2723 /* each buffer has header and data */
2724 info
->rx_buf_size
= sizeof(RXBUF
) + info
->max_frame_size
;
2726 /* calculate total allocation size for 8 buffers */
2727 info
->rx_buf_total_size
= info
->rx_buf_size
* 8;
2729 /* limit total allocated memory */
2730 if (info
->rx_buf_total_size
> 0x10000)
2731 info
->rx_buf_total_size
= 0x10000;
2733 /* calculate number of buffers */
2734 info
->rx_buf_count
= info
->rx_buf_total_size
/ info
->rx_buf_size
;
2736 info
->rx_buf
= kmalloc(info
->rx_buf_total_size
, GFP_KERNEL
);
2737 if (info
->rx_buf
== NULL
)
2740 rx_reset_buffers(info
);
2744 static void rx_free_buffers(MGSLPC_INFO
*info
)
2746 kfree(info
->rx_buf
);
2747 info
->rx_buf
= NULL
;
2750 static int claim_resources(MGSLPC_INFO
*info
)
2752 if (rx_alloc_buffers(info
) < 0 ) {
2753 printk( "Cant allocate rx buffer %s\n", info
->device_name
);
2754 release_resources(info
);
2760 static void release_resources(MGSLPC_INFO
*info
)
2762 if (debug_level
>= DEBUG_LEVEL_INFO
)
2763 printk("release_resources(%s)\n", info
->device_name
);
2764 rx_free_buffers(info
);
2767 /* Add the specified device instance data structure to the
2768 * global linked list of devices and increment the device count.
2770 * Arguments: info pointer to device instance data
2772 static void mgslpc_add_device(MGSLPC_INFO
*info
)
2774 info
->next_device
= NULL
;
2775 info
->line
= mgslpc_device_count
;
2776 sprintf(info
->device_name
,"ttySLP%d",info
->line
);
2778 if (info
->line
< MAX_DEVICE_COUNT
) {
2779 if (maxframe
[info
->line
])
2780 info
->max_frame_size
= maxframe
[info
->line
];
2783 mgslpc_device_count
++;
2785 if (!mgslpc_device_list
)
2786 mgslpc_device_list
= info
;
2788 MGSLPC_INFO
*current_dev
= mgslpc_device_list
;
2789 while( current_dev
->next_device
)
2790 current_dev
= current_dev
->next_device
;
2791 current_dev
->next_device
= info
;
2794 if (info
->max_frame_size
< 4096)
2795 info
->max_frame_size
= 4096;
2796 else if (info
->max_frame_size
> 65535)
2797 info
->max_frame_size
= 65535;
2799 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2800 info
->device_name
, info
->io_base
, info
->irq_level
);
2802 #if SYNCLINK_GENERIC_HDLC
2807 static void mgslpc_remove_device(MGSLPC_INFO
*remove_info
)
2809 MGSLPC_INFO
*info
= mgslpc_device_list
;
2810 MGSLPC_INFO
*last
= NULL
;
2813 if (info
== remove_info
) {
2815 last
->next_device
= info
->next_device
;
2817 mgslpc_device_list
= info
->next_device
;
2818 #if SYNCLINK_GENERIC_HDLC
2821 release_resources(info
);
2823 mgslpc_device_count
--;
2827 info
= info
->next_device
;
2831 static struct pcmcia_device_id mgslpc_ids
[] = {
2832 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2835 MODULE_DEVICE_TABLE(pcmcia
, mgslpc_ids
);
2837 static struct pcmcia_driver mgslpc_driver
= {
2838 .owner
= THIS_MODULE
,
2840 .name
= "synclink_cs",
2842 .probe
= mgslpc_probe
,
2843 .remove
= mgslpc_detach
,
2844 .id_table
= mgslpc_ids
,
2845 .suspend
= mgslpc_suspend
,
2846 .resume
= mgslpc_resume
,
2849 static const struct tty_operations mgslpc_ops
= {
2850 .open
= mgslpc_open
,
2851 .close
= mgslpc_close
,
2852 .write
= mgslpc_write
,
2853 .put_char
= mgslpc_put_char
,
2854 .flush_chars
= mgslpc_flush_chars
,
2855 .write_room
= mgslpc_write_room
,
2856 .chars_in_buffer
= mgslpc_chars_in_buffer
,
2857 .flush_buffer
= mgslpc_flush_buffer
,
2858 .ioctl
= mgslpc_ioctl
,
2859 .throttle
= mgslpc_throttle
,
2860 .unthrottle
= mgslpc_unthrottle
,
2861 .send_xchar
= mgslpc_send_xchar
,
2862 .break_ctl
= mgslpc_break
,
2863 .wait_until_sent
= mgslpc_wait_until_sent
,
2864 .read_proc
= mgslpc_read_proc
,
2865 .set_termios
= mgslpc_set_termios
,
2867 .start
= tx_release
,
2868 .hangup
= mgslpc_hangup
,
2869 .tiocmget
= tiocmget
,
2870 .tiocmset
= tiocmset
,
2873 static void synclink_cs_cleanup(void)
2877 printk("Unloading %s: version %s\n", driver_name
, driver_version
);
2879 while(mgslpc_device_list
)
2880 mgslpc_remove_device(mgslpc_device_list
);
2882 if (serial_driver
) {
2883 if ((rc
= tty_unregister_driver(serial_driver
)))
2884 printk("%s(%d) failed to unregister tty driver err=%d\n",
2885 __FILE__
,__LINE__
,rc
);
2886 put_tty_driver(serial_driver
);
2889 pcmcia_unregister_driver(&mgslpc_driver
);
2892 static int __init
synclink_cs_init(void)
2896 if (break_on_load
) {
2897 mgslpc_get_text_ptr();
2901 printk("%s %s\n", driver_name
, driver_version
);
2903 if ((rc
= pcmcia_register_driver(&mgslpc_driver
)) < 0)
2906 serial_driver
= alloc_tty_driver(MAX_DEVICE_COUNT
);
2907 if (!serial_driver
) {
2912 /* Initialize the tty_driver structure */
2914 serial_driver
->owner
= THIS_MODULE
;
2915 serial_driver
->driver_name
= "synclink_cs";
2916 serial_driver
->name
= "ttySLP";
2917 serial_driver
->major
= ttymajor
;
2918 serial_driver
->minor_start
= 64;
2919 serial_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
2920 serial_driver
->subtype
= SERIAL_TYPE_NORMAL
;
2921 serial_driver
->init_termios
= tty_std_termios
;
2922 serial_driver
->init_termios
.c_cflag
=
2923 B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
;
2924 serial_driver
->flags
= TTY_DRIVER_REAL_RAW
;
2925 tty_set_operations(serial_driver
, &mgslpc_ops
);
2927 if ((rc
= tty_register_driver(serial_driver
)) < 0) {
2928 printk("%s(%d):Couldn't register serial driver\n",
2930 put_tty_driver(serial_driver
);
2931 serial_driver
= NULL
;
2935 printk("%s %s, tty major#%d\n",
2936 driver_name
, driver_version
,
2937 serial_driver
->major
);
2942 synclink_cs_cleanup();
2946 static void __exit
synclink_cs_exit(void)
2948 synclink_cs_cleanup();
2951 module_init(synclink_cs_init
);
2952 module_exit(synclink_cs_exit
);
2954 static void mgslpc_set_rate(MGSLPC_INFO
*info
, unsigned char channel
, unsigned int rate
)
2959 /* note:standard BRG mode is broken in V3.2 chip
2960 * so enhanced mode is always used
2968 for (M
= 1; N
> 64 && M
< 16; M
++)
2974 * BGR[7..0] contained in BGR register
2975 * BGR[9..8] contained in CCR2[7..6]
2976 * divisor = (N+1)*2^M
2978 * Note: M *must* not be zero (causes asymetric duty cycle)
2980 write_reg(info
, (unsigned char) (channel
+ BGR
),
2981 (unsigned char) ((M
<< 6) + N
));
2982 val
= read_reg(info
, (unsigned char) (channel
+ CCR2
)) & 0x3f;
2983 val
|= ((M
<< 4) & 0xc0);
2984 write_reg(info
, (unsigned char) (channel
+ CCR2
), val
);
2988 /* Enabled the AUX clock output at the specified frequency.
2990 static void enable_auxclk(MGSLPC_INFO
*info
)
2996 * 07..06 MDS[1..0] 10 = transparent HDLC mode
2997 * 05 ADM Address Mode, 0 = no addr recognition
2998 * 04 TMD Timer Mode, 0 = external
2999 * 03 RAC Receiver Active, 0 = inactive
3000 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3001 * 01 TRS Timer Resolution, 1=512
3002 * 00 TLP Test Loop, 0 = no loop
3008 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3009 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3011 write_reg(info
, CHB
+ MODE
, val
);
3015 * 07 PU Power Up, 1=active, 0=power down
3016 * 06 MCE Master Clock Enable, 1=enabled
3018 * 04..02 SC[2..0] Encoding
3019 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3023 write_reg(info
, CHB
+ CCR0
, 0xc0);
3027 * 07 SFLG Shared Flag, 0 = disable shared flags
3028 * 06 GALP Go Active On Loop, 0 = not used
3029 * 05 GLP Go On Loop, 0 = not used
3030 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3031 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3032 * 02..00 CM[2..0] Clock Mode
3036 write_reg(info
, CHB
+ CCR1
, 0x17);
3040 * 07..06 BGR[9..8] Baud rate bits 9..8
3041 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3042 * 04 SSEL Clock source select, 1=submode b
3043 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3044 * 02 RWX Read/Write Exchange 0=disabled
3045 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3046 * 00 DIV, data inversion 0=disabled, 1=enabled
3050 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3051 write_reg(info
, CHB
+ CCR2
, 0x38);
3053 write_reg(info
, CHB
+ CCR2
, 0x30);
3057 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3058 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3059 * 05 TST1 Test Pin, 0=normal operation
3060 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3061 * 03..02 Reserved, must be 0
3062 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3066 write_reg(info
, CHB
+ CCR4
, 0x50);
3068 /* if auxclk not enabled, set internal BRG so
3069 * CTS transitions can be detected (requires TxC)
3071 if (info
->params
.mode
== MGSL_MODE_HDLC
&& info
->params
.clock_speed
)
3072 mgslpc_set_rate(info
, CHB
, info
->params
.clock_speed
);
3074 mgslpc_set_rate(info
, CHB
, 921600);
3077 static void loopback_enable(MGSLPC_INFO
*info
)
3081 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3082 val
= read_reg(info
, CHA
+ CCR1
) | (BIT2
+ BIT1
+ BIT0
);
3083 write_reg(info
, CHA
+ CCR1
, val
);
3085 /* CCR2:04 SSEL Clock source select, 1=submode b */
3086 val
= read_reg(info
, CHA
+ CCR2
) | (BIT4
+ BIT5
);
3087 write_reg(info
, CHA
+ CCR2
, val
);
3089 /* set LinkSpeed if available, otherwise default to 2Mbps */
3090 if (info
->params
.clock_speed
)
3091 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3093 mgslpc_set_rate(info
, CHA
, 1843200);
3095 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3096 val
= read_reg(info
, CHA
+ MODE
) | BIT0
;
3097 write_reg(info
, CHA
+ MODE
, val
);
3100 static void hdlc_mode(MGSLPC_INFO
*info
)
3103 unsigned char clkmode
, clksubmode
;
3105 /* disable all interrupts */
3106 irq_disable(info
, CHA
, 0xffff);
3107 irq_disable(info
, CHB
, 0xffff);
3108 port_irq_disable(info
, 0xff);
3110 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3111 clkmode
= clksubmode
= 0;
3112 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
3113 && info
->params
.flags
& HDLC_FLAG_TXC_DPLL
) {
3114 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3116 } else if (info
->params
.flags
& HDLC_FLAG_RXC_BRG
3117 && info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3118 /* clock mode 7b, rcv = BRG, xmt = BRG */
3121 } else if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
) {
3122 if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3123 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3127 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3130 } else if (info
->params
.flags
& HDLC_FLAG_TXC_BRG
) {
3131 /* clock mode 0b, rcv = RxC, xmt = BRG */
3137 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3138 * 05 ADM Address Mode, 0 = no addr recognition
3139 * 04 TMD Timer Mode, 0 = external
3140 * 03 RAC Receiver Active, 0 = inactive
3141 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3142 * 01 TRS Timer Resolution, 1=512
3143 * 00 TLP Test Loop, 0 = no loop
3148 if (info
->params
.loopback
)
3151 /* preserve RTS state */
3152 if (info
->serial_signals
& SerialSignal_RTS
)
3154 write_reg(info
, CHA
+ MODE
, val
);
3158 * 07 PU Power Up, 1=active, 0=power down
3159 * 06 MCE Master Clock Enable, 1=enabled
3161 * 04..02 SC[2..0] Encoding
3162 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3167 switch (info
->params
.encoding
)
3169 case HDLC_ENCODING_NRZI
:
3172 case HDLC_ENCODING_BIPHASE_SPACE
:
3175 case HDLC_ENCODING_BIPHASE_MARK
:
3178 case HDLC_ENCODING_BIPHASE_LEVEL
:
3180 break; // Manchester
3182 write_reg(info
, CHA
+ CCR0
, val
);
3186 * 07 SFLG Shared Flag, 0 = disable shared flags
3187 * 06 GALP Go Active On Loop, 0 = not used
3188 * 05 GLP Go On Loop, 0 = not used
3189 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3190 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3191 * 02..00 CM[2..0] Clock Mode
3195 val
= 0x10 + clkmode
;
3196 write_reg(info
, CHA
+ CCR1
, val
);
3200 * 07..06 BGR[9..8] Baud rate bits 9..8
3201 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3202 * 04 SSEL Clock source select, 1=submode b
3203 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3204 * 02 RWX Read/Write Exchange 0=disabled
3205 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3206 * 00 DIV, data inversion 0=disabled, 1=enabled
3211 if (clkmode
== 2 || clkmode
== 3 || clkmode
== 6
3212 || clkmode
== 7 || (clkmode
== 0 && clksubmode
== 1))
3216 if (info
->params
.crc_type
== HDLC_CRC_32_CCITT
)
3218 if (info
->params
.encoding
== HDLC_ENCODING_NRZB
)
3220 write_reg(info
, CHA
+ CCR2
, val
);
3224 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3225 * 05 EPT Enable preamble transmission, 1=enabled
3226 * 04 RADD Receive address pushed to FIFO, 0=disabled
3227 * 03 CRL CRC Reset Level, 0=FFFF
3228 * 02 RCRC Rx CRC 0=On 1=Off
3229 * 01 TCRC Tx CRC 0=On 1=Off
3230 * 00 PSD DPLL Phase Shift Disable
3235 if (info
->params
.crc_type
== HDLC_CRC_NONE
)
3237 if (info
->params
.preamble
!= HDLC_PREAMBLE_PATTERN_NONE
)
3239 switch (info
->params
.preamble_length
)
3241 case HDLC_PREAMBLE_LENGTH_16BITS
:
3244 case HDLC_PREAMBLE_LENGTH_32BITS
:
3247 case HDLC_PREAMBLE_LENGTH_64BITS
:
3251 write_reg(info
, CHA
+ CCR3
, val
);
3253 /* PRE - Preamble pattern */
3255 switch (info
->params
.preamble
)
3257 case HDLC_PREAMBLE_PATTERN_FLAGS
: val
= 0x7e; break;
3258 case HDLC_PREAMBLE_PATTERN_10
: val
= 0xaa; break;
3259 case HDLC_PREAMBLE_PATTERN_01
: val
= 0x55; break;
3260 case HDLC_PREAMBLE_PATTERN_ONES
: val
= 0xff; break;
3262 write_reg(info
, CHA
+ PRE
, val
);
3266 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3267 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3268 * 05 TST1 Test Pin, 0=normal operation
3269 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3270 * 03..02 Reserved, must be 0
3271 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3276 write_reg(info
, CHA
+ CCR4
, val
);
3277 if (info
->params
.flags
& HDLC_FLAG_RXC_DPLL
)
3278 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
* 16);
3280 mgslpc_set_rate(info
, CHA
, info
->params
.clock_speed
);
3282 /* RLCR Receive length check register
3284 * 7 1=enable receive length check
3285 * 6..0 Max frame length = (RL + 1) * 32
3287 write_reg(info
, CHA
+ RLCR
, 0);
3289 /* XBCH Transmit Byte Count High
3291 * 07 DMA mode, 0 = interrupt driven
3292 * 06 NRM, 0=ABM (ignored)
3293 * 05 CAS Carrier Auto Start
3294 * 04 XC Transmit Continuously (ignored)
3295 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3300 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3302 write_reg(info
, CHA
+ XBCH
, val
);
3303 enable_auxclk(info
);
3304 if (info
->params
.loopback
|| info
->testing_irq
)
3305 loopback_enable(info
);
3306 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3308 irq_enable(info
, CHB
, IRQ_CTS
);
3309 /* PVR[3] 1=AUTO CTS active */
3310 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3312 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3314 irq_enable(info
, CHA
,
3315 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_ALLSENT
+
3316 IRQ_UNDERRUN
+ IRQ_TXFIFO
);
3317 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3318 wait_command_complete(info
, CHA
);
3319 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3321 /* Master clock mode enabled above to allow reset commands
3322 * to complete even if no data clocks are present.
3324 * Disable master clock mode for normal communications because
3325 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3326 * IRQ when in master clock mode.
3328 * Leave master clock mode enabled for IRQ test because the
3329 * timer IRQ used by the test can only happen in master clock mode.
3331 if (!info
->testing_irq
)
3332 clear_reg_bits(info
, CHA
+ CCR0
, BIT6
);
3340 static void rx_stop(MGSLPC_INFO
*info
)
3342 if (debug_level
>= DEBUG_LEVEL_ISR
)
3343 printk("%s(%d):rx_stop(%s)\n",
3344 __FILE__
,__LINE__
, info
->device_name
);
3346 /* MODE:03 RAC Receiver Active, 0=inactive */
3347 clear_reg_bits(info
, CHA
+ MODE
, BIT3
);
3349 info
->rx_enabled
= false;
3350 info
->rx_overflow
= false;
3353 static void rx_start(MGSLPC_INFO
*info
)
3355 if (debug_level
>= DEBUG_LEVEL_ISR
)
3356 printk("%s(%d):rx_start(%s)\n",
3357 __FILE__
,__LINE__
, info
->device_name
);
3359 rx_reset_buffers(info
);
3360 info
->rx_enabled
= false;
3361 info
->rx_overflow
= false;
3363 /* MODE:03 RAC Receiver Active, 1=active */
3364 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3366 info
->rx_enabled
= true;
3369 static void tx_start(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
3371 if (debug_level
>= DEBUG_LEVEL_ISR
)
3372 printk("%s(%d):tx_start(%s)\n",
3373 __FILE__
,__LINE__
, info
->device_name
);
3375 if (info
->tx_count
) {
3376 /* If auto RTS enabled and RTS is inactive, then assert */
3377 /* RTS and set a flag indicating that the driver should */
3378 /* negate RTS when the transmission completes. */
3379 info
->drop_rts_on_tx_done
= false;
3381 if (info
->params
.flags
& HDLC_FLAG_AUTO_RTS
) {
3383 if (!(info
->serial_signals
& SerialSignal_RTS
)) {
3384 info
->serial_signals
|= SerialSignal_RTS
;
3386 info
->drop_rts_on_tx_done
= true;
3390 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3391 if (!info
->tx_active
) {
3392 info
->tx_active
= true;
3393 tx_ready(info
, tty
);
3396 info
->tx_active
= true;
3397 tx_ready(info
, tty
);
3398 mod_timer(&info
->tx_timer
, jiffies
+
3399 msecs_to_jiffies(5000));
3403 if (!info
->tx_enabled
)
3404 info
->tx_enabled
= true;
3407 static void tx_stop(MGSLPC_INFO
*info
)
3409 if (debug_level
>= DEBUG_LEVEL_ISR
)
3410 printk("%s(%d):tx_stop(%s)\n",
3411 __FILE__
,__LINE__
, info
->device_name
);
3413 del_timer(&info
->tx_timer
);
3415 info
->tx_enabled
= false;
3416 info
->tx_active
= false;
3419 /* Reset the adapter to a known state and prepare it for further use.
3421 static void reset_device(MGSLPC_INFO
*info
)
3423 /* power up both channels (set BIT7) */
3424 write_reg(info
, CHA
+ CCR0
, 0x80);
3425 write_reg(info
, CHB
+ CCR0
, 0x80);
3426 write_reg(info
, CHA
+ MODE
, 0);
3427 write_reg(info
, CHB
+ MODE
, 0);
3429 /* disable all interrupts */
3430 irq_disable(info
, CHA
, 0xffff);
3431 irq_disable(info
, CHB
, 0xffff);
3432 port_irq_disable(info
, 0xff);
3434 /* PCR Port Configuration Register
3436 * 07..04 DEC[3..0] Serial I/F select outputs
3437 * 03 output, 1=AUTO CTS control enabled
3438 * 02 RI Ring Indicator input 0=active
3439 * 01 DSR input 0=active
3440 * 00 DTR output 0=active
3444 write_reg(info
, PCR
, 0x06);
3446 /* PVR Port Value Register
3448 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3449 * 03 AUTO CTS output 1=enabled
3450 * 02 RI Ring Indicator input
3452 * 00 DTR output (1=inactive)
3456 // write_reg(info, PVR, PVR_DTR);
3458 /* IPC Interrupt Port Configuration
3460 * 07 VIS 1=Masked interrupts visible
3461 * 06..05 Reserved, 0
3462 * 04..03 SLA Slave address, 00 ignored
3463 * 02 CASM Cascading Mode, 1=daisy chain
3464 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3468 write_reg(info
, IPC
, 0x05);
3471 static void async_mode(MGSLPC_INFO
*info
)
3475 /* disable all interrupts */
3476 irq_disable(info
, CHA
, 0xffff);
3477 irq_disable(info
, CHB
, 0xffff);
3478 port_irq_disable(info
, 0xff);
3483 * 06 FRTS RTS State, 0=active
3484 * 05 FCTS Flow Control on CTS
3485 * 04 FLON Flow Control Enable
3486 * 03 RAC Receiver Active, 0 = inactive
3487 * 02 RTS 0=Auto RTS, 1=manual RTS
3488 * 01 TRS Timer Resolution, 1=512
3489 * 00 TLP Test Loop, 0 = no loop
3494 if (info
->params
.loopback
)
3497 /* preserve RTS state */
3498 if (!(info
->serial_signals
& SerialSignal_RTS
))
3500 write_reg(info
, CHA
+ MODE
, val
);
3504 * 07 PU Power Up, 1=active, 0=power down
3505 * 06 MCE Master Clock Enable, 1=enabled
3507 * 04..02 SC[2..0] Encoding, 000=NRZ
3508 * 01..00 SM[1..0] Serial Mode, 11=Async
3512 write_reg(info
, CHA
+ CCR0
, 0x83);
3516 * 07..05 Reserved, 0
3517 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3518 * 03 BCR Bit Clock Rate, 1=16x
3519 * 02..00 CM[2..0] Clock Mode, 111=BRG
3523 write_reg(info
, CHA
+ CCR1
, 0x1f);
3527 * 07..06 BGR[9..8] Baud rate bits 9..8
3528 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3529 * 04 SSEL Clock source select, 1=submode b
3530 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3531 * 02 RWX Read/Write Exchange 0=disabled
3533 * 00 DIV, data inversion 0=disabled, 1=enabled
3537 write_reg(info
, CHA
+ CCR2
, 0x10);
3541 * 07..01 Reserved, 0
3542 * 00 PSD DPLL Phase Shift Disable
3546 write_reg(info
, CHA
+ CCR3
, 0);
3550 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3551 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3552 * 05 TST1 Test Pin, 0=normal operation
3553 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3554 * 03..00 Reserved, must be 0
3558 write_reg(info
, CHA
+ CCR4
, 0x50);
3559 mgslpc_set_rate(info
, CHA
, info
->params
.data_rate
* 16);
3564 * 06 XBRK transmit break, 0=normal operation
3565 * 05 Stop bits (0=1, 1=2)
3566 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3567 * 02 PAREN Parity Enable
3568 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3572 if (info
->params
.data_bits
!= 8)
3573 val
|= BIT0
; /* 7 bits */
3574 if (info
->params
.stop_bits
!= 1)
3576 if (info
->params
.parity
!= ASYNC_PARITY_NONE
)
3578 val
|= BIT2
; /* Parity enable */
3579 if (info
->params
.parity
== ASYNC_PARITY_ODD
)
3584 write_reg(info
, CHA
+ DAFO
, val
);
3586 /* RFC Rx FIFO Control
3589 * 06 DPS, 1=parity bit not stored in data byte
3590 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3591 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3592 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3594 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3598 write_reg(info
, CHA
+ RFC
, 0x5c);
3600 /* RLCR Receive length check register
3602 * Max frame length = (RL + 1) * 32
3604 write_reg(info
, CHA
+ RLCR
, 0);
3606 /* XBCH Transmit Byte Count High
3608 * 07 DMA mode, 0 = interrupt driven
3609 * 06 NRM, 0=ABM (ignored)
3610 * 05 CAS Carrier Auto Start
3611 * 04 XC Transmit Continuously (ignored)
3612 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3617 if (info
->params
.flags
& HDLC_FLAG_AUTO_DCD
)
3619 write_reg(info
, CHA
+ XBCH
, val
);
3620 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
)
3621 irq_enable(info
, CHA
, IRQ_CTS
);
3623 /* MODE:03 RAC Receiver Active, 1=active */
3624 set_reg_bits(info
, CHA
+ MODE
, BIT3
);
3625 enable_auxclk(info
);
3626 if (info
->params
.flags
& HDLC_FLAG_AUTO_CTS
) {
3627 irq_enable(info
, CHB
, IRQ_CTS
);
3628 /* PVR[3] 1=AUTO CTS active */
3629 set_reg_bits(info
, CHA
+ PVR
, BIT3
);
3631 clear_reg_bits(info
, CHA
+ PVR
, BIT3
);
3632 irq_enable(info
, CHA
,
3633 IRQ_RXEOM
+ IRQ_RXFIFO
+ IRQ_BREAK_ON
+ IRQ_RXTIME
+
3634 IRQ_ALLSENT
+ IRQ_TXFIFO
);
3635 issue_command(info
, CHA
, CMD_TXRESET
+ CMD_RXRESET
);
3636 wait_command_complete(info
, CHA
);
3637 read_reg16(info
, CHA
+ ISR
); /* clear pending IRQs */
3640 /* Set the HDLC idle mode for the transmitter.
3642 static void tx_set_idle(MGSLPC_INFO
*info
)
3644 /* Note: ESCC2 only supports flags and one idle modes */
3645 if (info
->idle_mode
== HDLC_TXIDLE_FLAGS
)
3646 set_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3648 clear_reg_bits(info
, CHA
+ CCR1
, BIT3
);
3651 /* get state of the V24 status (input) signals.
3653 static void get_signals(MGSLPC_INFO
*info
)
3655 unsigned char status
= 0;
3657 /* preserve DTR and RTS */
3658 info
->serial_signals
&= SerialSignal_DTR
+ SerialSignal_RTS
;
3660 if (read_reg(info
, CHB
+ VSTR
) & BIT7
)
3661 info
->serial_signals
|= SerialSignal_DCD
;
3662 if (read_reg(info
, CHB
+ STAR
) & BIT1
)
3663 info
->serial_signals
|= SerialSignal_CTS
;
3665 status
= read_reg(info
, CHA
+ PVR
);
3666 if (!(status
& PVR_RI
))
3667 info
->serial_signals
|= SerialSignal_RI
;
3668 if (!(status
& PVR_DSR
))
3669 info
->serial_signals
|= SerialSignal_DSR
;
3672 /* Set the state of DTR and RTS based on contents of
3673 * serial_signals member of device extension.
3675 static void set_signals(MGSLPC_INFO
*info
)
3679 val
= read_reg(info
, CHA
+ MODE
);
3680 if (info
->params
.mode
== MGSL_MODE_ASYNC
) {
3681 if (info
->serial_signals
& SerialSignal_RTS
)
3686 if (info
->serial_signals
& SerialSignal_RTS
)
3691 write_reg(info
, CHA
+ MODE
, val
);
3693 if (info
->serial_signals
& SerialSignal_DTR
)
3694 clear_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3696 set_reg_bits(info
, CHA
+ PVR
, PVR_DTR
);
3699 static void rx_reset_buffers(MGSLPC_INFO
*info
)
3706 info
->rx_frame_count
= 0;
3707 for (i
=0 ; i
< info
->rx_buf_count
; i
++) {
3708 buf
= (RXBUF
*)(info
->rx_buf
+ (i
* info
->rx_buf_size
));
3709 buf
->status
= buf
->count
= 0;
3713 /* Attempt to return a received HDLC frame
3714 * Only frames received without errors are returned.
3716 * Returns true if frame returned, otherwise false
3718 static bool rx_get_frame(MGSLPC_INFO
*info
, struct tty_struct
*tty
)
3720 unsigned short status
;
3722 unsigned int framesize
= 0;
3723 unsigned long flags
;
3724 bool return_frame
= false;
3726 if (info
->rx_frame_count
== 0)
3729 buf
= (RXBUF
*)(info
->rx_buf
+ (info
->rx_get
* info
->rx_buf_size
));
3731 status
= buf
->status
;
3733 /* 07 VFR 1=valid frame
3734 * 06 RDO 1=data overrun
3735 * 05 CRC 1=OK, 0=error
3736 * 04 RAB 1=frame aborted
3738 if ((status
& 0xf0) != 0xA0) {
3739 if (!(status
& BIT7
) || (status
& BIT4
))
3740 info
->icount
.rxabort
++;
3741 else if (status
& BIT6
)
3742 info
->icount
.rxover
++;
3743 else if (!(status
& BIT5
)) {
3744 info
->icount
.rxcrc
++;
3745 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
)
3746 return_frame
= true;
3749 #if SYNCLINK_GENERIC_HDLC
3751 info
->netdev
->stats
.rx_errors
++;
3752 info
->netdev
->stats
.rx_frame_errors
++;
3756 return_frame
= true;
3759 framesize
= buf
->count
;
3761 if (debug_level
>= DEBUG_LEVEL_BH
)
3762 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3763 __FILE__
,__LINE__
,info
->device_name
,status
,framesize
);
3765 if (debug_level
>= DEBUG_LEVEL_DATA
)
3766 trace_block(info
, buf
->data
, framesize
, 0);
3769 if ((info
->params
.crc_type
& HDLC_CRC_RETURN_EX
&&
3770 framesize
+1 > info
->max_frame_size
) ||
3771 framesize
> info
->max_frame_size
)
3772 info
->icount
.rxlong
++;
3775 info
->icount
.rxok
++;
3777 if (info
->params
.crc_type
& HDLC_CRC_RETURN_EX
) {
3778 *(buf
->data
+ framesize
) = status
& BIT5
? RX_OK
:RX_CRC_ERROR
;
3782 #if SYNCLINK_GENERIC_HDLC
3784 hdlcdev_rx(info
, buf
->data
, framesize
);
3787 ldisc_receive_buf(tty
, buf
->data
, info
->flag_buf
, framesize
);
3791 spin_lock_irqsave(&info
->lock
,flags
);
3792 buf
->status
= buf
->count
= 0;
3793 info
->rx_frame_count
--;
3795 if (info
->rx_get
>= info
->rx_buf_count
)
3797 spin_unlock_irqrestore(&info
->lock
,flags
);
3802 static bool register_test(MGSLPC_INFO
*info
)
3804 static unsigned char patterns
[] =
3805 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3806 static unsigned int count
= ARRAY_SIZE(patterns
);
3809 unsigned long flags
;
3811 spin_lock_irqsave(&info
->lock
,flags
);
3814 for (i
= 0; i
< count
; i
++) {
3815 write_reg(info
, XAD1
, patterns
[i
]);
3816 write_reg(info
, XAD2
, patterns
[(i
+ 1) % count
]);
3817 if ((read_reg(info
, XAD1
) != patterns
[i
]) ||
3818 (read_reg(info
, XAD2
) != patterns
[(i
+ 1) % count
])) {
3824 spin_unlock_irqrestore(&info
->lock
,flags
);
3828 static bool irq_test(MGSLPC_INFO
*info
)
3830 unsigned long end_time
;
3831 unsigned long flags
;
3833 spin_lock_irqsave(&info
->lock
,flags
);
3836 info
->testing_irq
= true;
3839 info
->irq_occurred
= false;
3841 /* init hdlc mode */
3843 irq_enable(info
, CHA
, IRQ_TIMER
);
3844 write_reg(info
, CHA
+ TIMR
, 0); /* 512 cycles */
3845 issue_command(info
, CHA
, CMD_START_TIMER
);
3847 spin_unlock_irqrestore(&info
->lock
,flags
);
3850 while(end_time
-- && !info
->irq_occurred
) {
3851 msleep_interruptible(10);
3854 info
->testing_irq
= false;
3856 spin_lock_irqsave(&info
->lock
,flags
);
3858 spin_unlock_irqrestore(&info
->lock
,flags
);
3860 return info
->irq_occurred
;
3863 static int adapter_test(MGSLPC_INFO
*info
)
3865 if (!register_test(info
)) {
3866 info
->init_error
= DiagStatus_AddressFailure
;
3867 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
3868 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->io_base
) );
3872 if (!irq_test(info
)) {
3873 info
->init_error
= DiagStatus_IrqFailure
;
3874 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
3875 __FILE__
,__LINE__
,info
->device_name
, (unsigned short)(info
->irq_level
) );
3879 if (debug_level
>= DEBUG_LEVEL_INFO
)
3880 printk("%s(%d):device %s passed diagnostics\n",
3881 __FILE__
,__LINE__
,info
->device_name
);
3885 static void trace_block(MGSLPC_INFO
*info
,const char* data
, int count
, int xmit
)
3890 printk("%s tx data:\n",info
->device_name
);
3892 printk("%s rx data:\n",info
->device_name
);
3900 for(i
=0;i
<linecount
;i
++)
3901 printk("%02X ",(unsigned char)data
[i
]);
3904 for(i
=0;i
<linecount
;i
++) {
3905 if (data
[i
]>=040 && data
[i
]<=0176)
3906 printk("%c",data
[i
]);
3917 /* HDLC frame time out
3918 * update stats and do tx completion processing
3920 static void tx_timeout(unsigned long context
)
3922 MGSLPC_INFO
*info
= (MGSLPC_INFO
*)context
;
3923 unsigned long flags
;
3925 if ( debug_level
>= DEBUG_LEVEL_INFO
)
3926 printk( "%s(%d):tx_timeout(%s)\n",
3927 __FILE__
,__LINE__
,info
->device_name
);
3928 if(info
->tx_active
&&
3929 info
->params
.mode
== MGSL_MODE_HDLC
) {
3930 info
->icount
.txtimeout
++;
3932 spin_lock_irqsave(&info
->lock
,flags
);
3933 info
->tx_active
= false;
3934 info
->tx_count
= info
->tx_put
= info
->tx_get
= 0;
3936 spin_unlock_irqrestore(&info
->lock
,flags
);
3938 #if SYNCLINK_GENERIC_HDLC
3940 hdlcdev_tx_done(info
);
3944 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
3945 bh_transmit(info
, tty
);
3950 #if SYNCLINK_GENERIC_HDLC
3953 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
3954 * set encoding and frame check sequence (FCS) options
3956 * dev pointer to network device structure
3957 * encoding serial encoding setting
3958 * parity FCS setting
3960 * returns 0 if success, otherwise error code
3962 static int hdlcdev_attach(struct net_device
*dev
, unsigned short encoding
,
3963 unsigned short parity
)
3965 MGSLPC_INFO
*info
= dev_to_port(dev
);
3966 struct tty_struct
*tty
;
3967 unsigned char new_encoding
;
3968 unsigned short new_crctype
;
3970 /* return error if TTY interface open */
3971 if (info
->port
.count
)
3976 case ENCODING_NRZ
: new_encoding
= HDLC_ENCODING_NRZ
; break;
3977 case ENCODING_NRZI
: new_encoding
= HDLC_ENCODING_NRZI_SPACE
; break;
3978 case ENCODING_FM_MARK
: new_encoding
= HDLC_ENCODING_BIPHASE_MARK
; break;
3979 case ENCODING_FM_SPACE
: new_encoding
= HDLC_ENCODING_BIPHASE_SPACE
; break;
3980 case ENCODING_MANCHESTER
: new_encoding
= HDLC_ENCODING_BIPHASE_LEVEL
; break;
3981 default: return -EINVAL
;
3986 case PARITY_NONE
: new_crctype
= HDLC_CRC_NONE
; break;
3987 case PARITY_CRC16_PR1_CCITT
: new_crctype
= HDLC_CRC_16_CCITT
; break;
3988 case PARITY_CRC32_PR1_CCITT
: new_crctype
= HDLC_CRC_32_CCITT
; break;
3989 default: return -EINVAL
;
3992 info
->params
.encoding
= new_encoding
;
3993 info
->params
.crc_type
= new_crctype
;
3995 /* if network interface up, reprogram hardware */
3996 if (info
->netcount
) {
3997 tty
= tty_port_tty_get(&info
->port
);
3998 mgslpc_program_hw(info
, tty
);
4006 * called by generic HDLC layer to send frame
4008 * skb socket buffer containing HDLC frame
4009 * dev pointer to network device structure
4011 * returns 0 if success, otherwise error code
4013 static int hdlcdev_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
4015 MGSLPC_INFO
*info
= dev_to_port(dev
);
4016 unsigned long flags
;
4018 if (debug_level
>= DEBUG_LEVEL_INFO
)
4019 printk(KERN_INFO
"%s:hdlc_xmit(%s)\n",__FILE__
,dev
->name
);
4021 /* stop sending until this frame completes */
4022 netif_stop_queue(dev
);
4024 /* copy data to device buffers */
4025 skb_copy_from_linear_data(skb
, info
->tx_buf
, skb
->len
);
4027 info
->tx_put
= info
->tx_count
= skb
->len
;
4029 /* update network statistics */
4030 dev
->stats
.tx_packets
++;
4031 dev
->stats
.tx_bytes
+= skb
->len
;
4033 /* done with socket buffer, so free it */
4036 /* save start time for transmit timeout detection */
4037 dev
->trans_start
= jiffies
;
4039 /* start hardware transmitter if necessary */
4040 spin_lock_irqsave(&info
->lock
,flags
);
4041 if (!info
->tx_active
) {
4042 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4043 tx_start(info
, tty
);
4046 spin_unlock_irqrestore(&info
->lock
,flags
);
4052 * called by network layer when interface enabled
4053 * claim resources and initialize hardware
4055 * dev pointer to network device structure
4057 * returns 0 if success, otherwise error code
4059 static int hdlcdev_open(struct net_device
*dev
)
4061 MGSLPC_INFO
*info
= dev_to_port(dev
);
4062 struct tty_struct
*tty
;
4064 unsigned long flags
;
4066 if (debug_level
>= DEBUG_LEVEL_INFO
)
4067 printk("%s:hdlcdev_open(%s)\n",__FILE__
,dev
->name
);
4069 /* generic HDLC layer open processing */
4070 if ((rc
= hdlc_open(dev
)))
4073 /* arbitrate between network and tty opens */
4074 spin_lock_irqsave(&info
->netlock
, flags
);
4075 if (info
->port
.count
!= 0 || info
->netcount
!= 0) {
4076 printk(KERN_WARNING
"%s: hdlc_open returning busy\n", dev
->name
);
4077 spin_unlock_irqrestore(&info
->netlock
, flags
);
4081 spin_unlock_irqrestore(&info
->netlock
, flags
);
4083 tty
= tty_port_tty_get(&info
->port
);
4084 /* claim resources and init adapter */
4085 if ((rc
= startup(info
, tty
)) != 0) {
4087 spin_lock_irqsave(&info
->netlock
, flags
);
4089 spin_unlock_irqrestore(&info
->netlock
, flags
);
4092 /* assert DTR and RTS, apply hardware settings */
4093 info
->serial_signals
|= SerialSignal_RTS
+ SerialSignal_DTR
;
4094 mgslpc_program_hw(info
, tty
);
4097 /* enable network layer transmit */
4098 dev
->trans_start
= jiffies
;
4099 netif_start_queue(dev
);
4101 /* inform generic HDLC layer of current DCD status */
4102 spin_lock_irqsave(&info
->lock
, flags
);
4104 spin_unlock_irqrestore(&info
->lock
, flags
);
4105 if (info
->serial_signals
& SerialSignal_DCD
)
4106 netif_carrier_on(dev
);
4108 netif_carrier_off(dev
);
4113 * called by network layer when interface is disabled
4114 * shutdown hardware and release resources
4116 * dev pointer to network device structure
4118 * returns 0 if success, otherwise error code
4120 static int hdlcdev_close(struct net_device
*dev
)
4122 MGSLPC_INFO
*info
= dev_to_port(dev
);
4123 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4124 unsigned long flags
;
4126 if (debug_level
>= DEBUG_LEVEL_INFO
)
4127 printk("%s:hdlcdev_close(%s)\n",__FILE__
,dev
->name
);
4129 netif_stop_queue(dev
);
4131 /* shutdown adapter and release resources */
4132 shutdown(info
, tty
);
4136 spin_lock_irqsave(&info
->netlock
, flags
);
4138 spin_unlock_irqrestore(&info
->netlock
, flags
);
4144 * called by network layer to process IOCTL call to network device
4146 * dev pointer to network device structure
4147 * ifr pointer to network interface request structure
4148 * cmd IOCTL command code
4150 * returns 0 if success, otherwise error code
4152 static int hdlcdev_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
4154 const size_t size
= sizeof(sync_serial_settings
);
4155 sync_serial_settings new_line
;
4156 sync_serial_settings __user
*line
= ifr
->ifr_settings
.ifs_ifsu
.sync
;
4157 MGSLPC_INFO
*info
= dev_to_port(dev
);
4160 if (debug_level
>= DEBUG_LEVEL_INFO
)
4161 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__
,dev
->name
);
4163 /* return error if TTY interface open */
4164 if (info
->port
.count
)
4167 if (cmd
!= SIOCWANDEV
)
4168 return hdlc_ioctl(dev
, ifr
, cmd
);
4170 switch(ifr
->ifr_settings
.type
) {
4171 case IF_GET_IFACE
: /* return current sync_serial_settings */
4173 ifr
->ifr_settings
.type
= IF_IFACE_SYNC_SERIAL
;
4174 if (ifr
->ifr_settings
.size
< size
) {
4175 ifr
->ifr_settings
.size
= size
; /* data size wanted */
4179 flags
= info
->params
.flags
& (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4180 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4181 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4182 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4185 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
): new_line
.clock_type
= CLOCK_EXT
; break;
4186 case (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_INT
; break;
4187 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
): new_line
.clock_type
= CLOCK_TXINT
; break;
4188 case (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
): new_line
.clock_type
= CLOCK_TXFROMRX
; break;
4189 default: new_line
.clock_type
= CLOCK_DEFAULT
;
4192 new_line
.clock_rate
= info
->params
.clock_speed
;
4193 new_line
.loopback
= info
->params
.loopback
? 1:0;
4195 if (copy_to_user(line
, &new_line
, size
))
4199 case IF_IFACE_SYNC_SERIAL
: /* set sync_serial_settings */
4201 if(!capable(CAP_NET_ADMIN
))
4203 if (copy_from_user(&new_line
, line
, size
))
4206 switch (new_line
.clock_type
)
4208 case CLOCK_EXT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_TXCPIN
; break;
4209 case CLOCK_TXFROMRX
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_RXCPIN
; break;
4210 case CLOCK_INT
: flags
= HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
; break;
4211 case CLOCK_TXINT
: flags
= HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_TXC_BRG
; break;
4212 case CLOCK_DEFAULT
: flags
= info
->params
.flags
&
4213 (HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4214 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4215 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4216 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
); break;
4217 default: return -EINVAL
;
4220 if (new_line
.loopback
!= 0 && new_line
.loopback
!= 1)
4223 info
->params
.flags
&= ~(HDLC_FLAG_RXC_RXCPIN
| HDLC_FLAG_RXC_DPLL
|
4224 HDLC_FLAG_RXC_BRG
| HDLC_FLAG_RXC_TXCPIN
|
4225 HDLC_FLAG_TXC_TXCPIN
| HDLC_FLAG_TXC_DPLL
|
4226 HDLC_FLAG_TXC_BRG
| HDLC_FLAG_TXC_RXCPIN
);
4227 info
->params
.flags
|= flags
;
4229 info
->params
.loopback
= new_line
.loopback
;
4231 if (flags
& (HDLC_FLAG_RXC_BRG
| HDLC_FLAG_TXC_BRG
))
4232 info
->params
.clock_speed
= new_line
.clock_rate
;
4234 info
->params
.clock_speed
= 0;
4236 /* if network interface up, reprogram hardware */
4237 if (info
->netcount
) {
4238 struct tty_struct
*tty
= tty_port_tty_get(&info
->port
);
4239 mgslpc_program_hw(info
, tty
);
4245 return hdlc_ioctl(dev
, ifr
, cmd
);
4250 * called by network layer when transmit timeout is detected
4252 * dev pointer to network device structure
4254 static void hdlcdev_tx_timeout(struct net_device
*dev
)
4256 MGSLPC_INFO
*info
= dev_to_port(dev
);
4257 unsigned long flags
;
4259 if (debug_level
>= DEBUG_LEVEL_INFO
)
4260 printk("hdlcdev_tx_timeout(%s)\n",dev
->name
);
4262 dev
->stats
.tx_errors
++;
4263 dev
->stats
.tx_aborted_errors
++;
4265 spin_lock_irqsave(&info
->lock
,flags
);
4267 spin_unlock_irqrestore(&info
->lock
,flags
);
4269 netif_wake_queue(dev
);
4273 * called by device driver when transmit completes
4274 * reenable network layer transmit if stopped
4276 * info pointer to device instance information
4278 static void hdlcdev_tx_done(MGSLPC_INFO
*info
)
4280 if (netif_queue_stopped(info
->netdev
))
4281 netif_wake_queue(info
->netdev
);
4285 * called by device driver when frame received
4286 * pass frame to network layer
4288 * info pointer to device instance information
4289 * buf pointer to buffer contianing frame data
4290 * size count of data bytes in buf
4292 static void hdlcdev_rx(MGSLPC_INFO
*info
, char *buf
, int size
)
4294 struct sk_buff
*skb
= dev_alloc_skb(size
);
4295 struct net_device
*dev
= info
->netdev
;
4297 if (debug_level
>= DEBUG_LEVEL_INFO
)
4298 printk("hdlcdev_rx(%s)\n",dev
->name
);
4301 printk(KERN_NOTICE
"%s: can't alloc skb, dropping packet\n", dev
->name
);
4302 dev
->stats
.rx_dropped
++;
4306 memcpy(skb_put(skb
, size
), buf
, size
);
4308 skb
->protocol
= hdlc_type_trans(skb
, dev
);
4310 dev
->stats
.rx_packets
++;
4311 dev
->stats
.rx_bytes
+= size
;
4316 static const struct net_device_ops hdlcdev_ops
= {
4317 .ndo_open
= hdlcdev_open
,
4318 .ndo_stop
= hdlcdev_close
,
4319 .ndo_change_mtu
= hdlc_change_mtu
,
4320 .ndo_start_xmit
= hdlc_start_xmit
,
4321 .ndo_do_ioctl
= hdlcdev_ioctl
,
4322 .ndo_tx_timeout
= hdlcdev_tx_timeout
,
4326 * called by device driver when adding device instance
4327 * do generic HDLC initialization
4329 * info pointer to device instance information
4331 * returns 0 if success, otherwise error code
4333 static int hdlcdev_init(MGSLPC_INFO
*info
)
4336 struct net_device
*dev
;
4339 /* allocate and initialize network and HDLC layer objects */
4341 if (!(dev
= alloc_hdlcdev(info
))) {
4342 printk(KERN_ERR
"%s:hdlc device allocation failure\n",__FILE__
);
4346 /* for network layer reporting purposes only */
4347 dev
->base_addr
= info
->io_base
;
4348 dev
->irq
= info
->irq_level
;
4350 /* network layer callbacks and settings */
4351 dev
->netdev_ops
= &hdlcdev_ops
;
4352 dev
->watchdog_timeo
= 10 * HZ
;
4353 dev
->tx_queue_len
= 50;
4355 /* generic HDLC layer callbacks and settings */
4356 hdlc
= dev_to_hdlc(dev
);
4357 hdlc
->attach
= hdlcdev_attach
;
4358 hdlc
->xmit
= hdlcdev_xmit
;
4360 /* register objects with HDLC layer */
4361 if ((rc
= register_hdlc_device(dev
))) {
4362 printk(KERN_WARNING
"%s:unable to register hdlc device\n",__FILE__
);
4372 * called by device driver when removing device instance
4373 * do generic HDLC cleanup
4375 * info pointer to device instance information
4377 static void hdlcdev_exit(MGSLPC_INFO
*info
)
4379 unregister_hdlc_device(info
->netdev
);
4380 free_netdev(info
->netdev
);
4381 info
->netdev
= NULL
;
4384 #endif /* CONFIG_HDLC */