2 * USB ConnectTech WhiteHEAT driver
7 * Copyright (C) 1999 - 2001
8 * Greg Kroah-Hartman (greg@kroah.com)
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * See Documentation/usb/usb-serial.txt for more information on using this
18 * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
19 * Upgrade to full working driver
22 * switched from using spinlock to a semaphore, which fixes lots of
26 * Identify version on module load.
29 * Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
30 * than once, and the got the proper usb_device_id table entries so
31 * the driver works again.
33 * (11/01/2000) Adam J. Richter
34 * usb_device_id table support
37 * Fixed bug with urb->dev not being set properly, now that the usb
41 * firmware is improved to guard against crap sent to device
42 * firmware now replies CMD_FAILURE on bad things
43 * read_callback fix you provided for private info struct
44 * command_finished now indicates success or fail
45 * setup_port struct now packed to avoid gcc padding
46 * firmware uses 1 based port numbering, driver now handles that
49 * Removed DEBUG #ifdefs with call to usb_serial_debug_data
52 * Added module_init and module_exit functions to handle the fact that this
53 * driver is a loadable module now.
54 * Fixed bug with port->minor that was found by Al Borchers
57 * Added support for port settings. Baud rate can now be changed. Line
58 * signals are not transferred to and from the tty layer yet, but things
59 * seem to be working well now.
62 * First cut at open and close commands. Data can flow through the ports at
66 * Split driver up into device specific pieces.
70 #include <linux/kernel.h>
71 #include <linux/errno.h>
72 #include <linux/init.h>
73 #include <linux/slab.h>
74 #include <linux/tty.h>
75 #include <linux/tty_driver.h>
76 #include <linux/tty_flip.h>
77 #include <linux/module.h>
78 #include <linux/spinlock.h>
79 #include <linux/mutex.h>
80 #include <linux/uaccess.h>
81 #include <asm/termbits.h>
82 #include <linux/usb.h>
83 #include <linux/serial_reg.h>
84 #include <linux/serial.h>
85 #include <linux/usb/serial.h>
86 #include <linux/firmware.h>
87 #include <linux/ihex.h>
88 #include "whiteheat.h" /* WhiteHEAT specific commands */
99 #define DRIVER_VERSION "v2.0"
100 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
101 #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
103 #define CONNECT_TECH_VENDOR_ID 0x0710
104 #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
105 #define CONNECT_TECH_WHITE_HEAT_ID 0x8001
108 ID tables for whiteheat are unusual, because we want to different
109 things for different versions of the device. Eventually, this
110 will be doable from a single table. But, for now, we define two
111 separate ID tables, and then a third table that combines them
112 just for the purpose of exporting the autoloading information.
114 static struct usb_device_id id_table_std
[] = {
115 { USB_DEVICE(CONNECT_TECH_VENDOR_ID
, CONNECT_TECH_WHITE_HEAT_ID
) },
116 { } /* Terminating entry */
119 static struct usb_device_id id_table_prerenumeration
[] = {
120 { USB_DEVICE(CONNECT_TECH_VENDOR_ID
, CONNECT_TECH_FAKE_WHITE_HEAT_ID
) },
121 { } /* Terminating entry */
124 static struct usb_device_id id_table_combined
[] = {
125 { USB_DEVICE(CONNECT_TECH_VENDOR_ID
, CONNECT_TECH_WHITE_HEAT_ID
) },
126 { USB_DEVICE(CONNECT_TECH_VENDOR_ID
, CONNECT_TECH_FAKE_WHITE_HEAT_ID
) },
127 { } /* Terminating entry */
130 MODULE_DEVICE_TABLE(usb
, id_table_combined
);
132 static struct usb_driver whiteheat_driver
= {
134 .probe
= usb_serial_probe
,
135 .disconnect
= usb_serial_disconnect
,
136 .id_table
= id_table_combined
,
140 /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
141 static int whiteheat_firmware_download(struct usb_serial
*serial
,
142 const struct usb_device_id
*id
);
143 static int whiteheat_firmware_attach(struct usb_serial
*serial
);
145 /* function prototypes for the Connect Tech WhiteHEAT serial converter */
146 static int whiteheat_attach(struct usb_serial
*serial
);
147 static void whiteheat_shutdown(struct usb_serial
*serial
);
148 static int whiteheat_open(struct tty_struct
*tty
,
149 struct usb_serial_port
*port
, struct file
*filp
);
150 static void whiteheat_close(struct tty_struct
*tty
,
151 struct usb_serial_port
*port
, struct file
*filp
);
152 static int whiteheat_write(struct tty_struct
*tty
,
153 struct usb_serial_port
*port
,
154 const unsigned char *buf
, int count
);
155 static int whiteheat_write_room(struct tty_struct
*tty
);
156 static int whiteheat_ioctl(struct tty_struct
*tty
, struct file
*file
,
157 unsigned int cmd
, unsigned long arg
);
158 static void whiteheat_set_termios(struct tty_struct
*tty
,
159 struct usb_serial_port
*port
, struct ktermios
*old
);
160 static int whiteheat_tiocmget(struct tty_struct
*tty
, struct file
*file
);
161 static int whiteheat_tiocmset(struct tty_struct
*tty
, struct file
*file
,
162 unsigned int set
, unsigned int clear
);
163 static void whiteheat_break_ctl(struct tty_struct
*tty
, int break_state
);
164 static int whiteheat_chars_in_buffer(struct tty_struct
*tty
);
165 static void whiteheat_throttle(struct tty_struct
*tty
);
166 static void whiteheat_unthrottle(struct tty_struct
*tty
);
167 static void whiteheat_read_callback(struct urb
*urb
);
168 static void whiteheat_write_callback(struct urb
*urb
);
170 static struct usb_serial_driver whiteheat_fake_device
= {
172 .owner
= THIS_MODULE
,
173 .name
= "whiteheatnofirm",
175 .description
= "Connect Tech - WhiteHEAT - (prerenumeration)",
176 .usb_driver
= &whiteheat_driver
,
177 .id_table
= id_table_prerenumeration
,
179 .probe
= whiteheat_firmware_download
,
180 .attach
= whiteheat_firmware_attach
,
183 static struct usb_serial_driver whiteheat_device
= {
185 .owner
= THIS_MODULE
,
188 .description
= "Connect Tech - WhiteHEAT",
189 .usb_driver
= &whiteheat_driver
,
190 .id_table
= id_table_std
,
192 .attach
= whiteheat_attach
,
193 .shutdown
= whiteheat_shutdown
,
194 .open
= whiteheat_open
,
195 .close
= whiteheat_close
,
196 .write
= whiteheat_write
,
197 .write_room
= whiteheat_write_room
,
198 .ioctl
= whiteheat_ioctl
,
199 .set_termios
= whiteheat_set_termios
,
200 .break_ctl
= whiteheat_break_ctl
,
201 .tiocmget
= whiteheat_tiocmget
,
202 .tiocmset
= whiteheat_tiocmset
,
203 .chars_in_buffer
= whiteheat_chars_in_buffer
,
204 .throttle
= whiteheat_throttle
,
205 .unthrottle
= whiteheat_unthrottle
,
206 .read_bulk_callback
= whiteheat_read_callback
,
207 .write_bulk_callback
= whiteheat_write_callback
,
211 struct whiteheat_command_private
{
214 __u8 command_finished
;
215 wait_queue_head_t wait_command
; /* for handling sleeping whilst
216 waiting for a command to
218 __u8 result_buffer
[64];
222 #define THROTTLED 0x01
223 #define ACTUALLY_THROTTLED 0x02
225 static int urb_pool_size
= 8;
227 struct whiteheat_urb_wrap
{
228 struct list_head list
;
232 struct whiteheat_private
{
235 __u8 mcr
; /* FIXME: no locking on mcr */
236 struct list_head rx_urbs_free
;
237 struct list_head rx_urbs_submitted
;
238 struct list_head rx_urb_q
;
239 struct work_struct rx_work
;
240 struct usb_serial_port
*port
;
241 struct list_head tx_urbs_free
;
242 struct list_head tx_urbs_submitted
;
243 struct mutex deathwarrant
;
247 /* local function prototypes */
248 static int start_command_port(struct usb_serial
*serial
);
249 static void stop_command_port(struct usb_serial
*serial
);
250 static void command_port_write_callback(struct urb
*urb
);
251 static void command_port_read_callback(struct urb
*urb
);
253 static int start_port_read(struct usb_serial_port
*port
);
254 static struct whiteheat_urb_wrap
*urb_to_wrap(struct urb
*urb
,
255 struct list_head
*head
);
256 static struct list_head
*list_first(struct list_head
*head
);
257 static void rx_data_softint(struct work_struct
*work
);
259 static int firm_send_command(struct usb_serial_port
*port
, __u8 command
,
260 __u8
*data
, __u8 datasize
);
261 static int firm_open(struct usb_serial_port
*port
);
262 static int firm_close(struct usb_serial_port
*port
);
263 static int firm_setup_port(struct tty_struct
*tty
);
264 static int firm_set_rts(struct usb_serial_port
*port
, __u8 onoff
);
265 static int firm_set_dtr(struct usb_serial_port
*port
, __u8 onoff
);
266 static int firm_set_break(struct usb_serial_port
*port
, __u8 onoff
);
267 static int firm_purge(struct usb_serial_port
*port
, __u8 rxtx
);
268 static int firm_get_dtr_rts(struct usb_serial_port
*port
);
269 static int firm_report_tx_done(struct usb_serial_port
*port
);
272 #define COMMAND_PORT 4
273 #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
274 #define COMMAND_TIMEOUT_MS 2000
275 #define CLOSING_DELAY (30 * HZ)
278 /*****************************************************************************
279 * Connect Tech's White Heat prerenumeration driver functions
280 *****************************************************************************/
282 /* steps to download the firmware to the WhiteHEAT device:
283 - hold the reset (by writing to the reset bit of the CPUCS register)
284 - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
285 - release the reset (by writing to the CPUCS register)
286 - download the WH.HEX file for all addresses greater than 0x1b3f using
287 VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
289 - download the WH.HEX file for all addresses less than 0x1b40 using
290 VENDOR_REQUEST_ANCHOR_LOAD
292 - device renumerated itself and comes up as new device id with all
293 firmware download completed.
295 static int whiteheat_firmware_download(struct usb_serial
*serial
,
296 const struct usb_device_id
*id
)
298 int response
, ret
= -ENOENT
;
299 const struct firmware
*loader_fw
= NULL
, *firmware_fw
= NULL
;
300 const struct ihex_binrec
*record
;
304 if (request_ihex_firmware(&firmware_fw
, "whiteheat.fw",
305 &serial
->dev
->dev
)) {
306 err("%s - request \"whiteheat.fw\" failed", __func__
);
309 if (request_ihex_firmware(&loader_fw
, "whiteheat_loader.fw",
310 &serial
->dev
->dev
)) {
311 err("%s - request \"whiteheat_loader.fw\" failed", __func__
);
315 response
= ezusb_set_reset (serial
, 1);
317 record
= (const struct ihex_binrec
*)loader_fw
->data
;
319 response
= ezusb_writememory (serial
, be32_to_cpu(record
->addr
),
320 (unsigned char *)record
->data
,
321 be16_to_cpu(record
->len
), 0xa0);
323 err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
324 __func__
, response
, be32_to_cpu(record
->addr
),
325 record
->data
, be16_to_cpu(record
->len
));
328 record
= ihex_next_binrec(record
);
331 response
= ezusb_set_reset(serial
, 0);
333 record
= (const struct ihex_binrec
*)firmware_fw
->data
;
334 while (record
&& be32_to_cpu(record
->addr
) < 0x1b40)
335 record
= ihex_next_binrec(record
);
337 response
= ezusb_writememory (serial
, be32_to_cpu(record
->addr
),
338 (unsigned char *)record
->data
,
339 be16_to_cpu(record
->len
), 0xa3);
341 err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
342 __func__
, response
, be32_to_cpu(record
->addr
),
343 record
->data
, be16_to_cpu(record
->len
));
349 response
= ezusb_set_reset(serial
, 1);
351 record
= (const struct ihex_binrec
*)firmware_fw
->data
;
352 while (record
&& be32_to_cpu(record
->addr
) < 0x1b40) {
353 response
= ezusb_writememory (serial
, be32_to_cpu(record
->addr
),
354 (unsigned char *)record
->data
,
355 be16_to_cpu(record
->len
), 0xa0);
357 err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
358 __func__
, response
, be32_to_cpu(record
->addr
),
359 record
->data
, be16_to_cpu(record
->len
));
365 response
= ezusb_set_reset (serial
, 0);
367 release_firmware(loader_fw
);
368 release_firmware(firmware_fw
);
373 static int whiteheat_firmware_attach(struct usb_serial
*serial
)
375 /* We want this device to fail to have a driver assigned to it */
380 /*****************************************************************************
381 * Connect Tech's White Heat serial driver functions
382 *****************************************************************************/
383 static int whiteheat_attach(struct usb_serial
*serial
)
385 struct usb_serial_port
*command_port
;
386 struct whiteheat_command_private
*command_info
;
387 struct usb_serial_port
*port
;
388 struct whiteheat_private
*info
;
389 struct whiteheat_hw_info
*hw_info
;
399 struct whiteheat_urb_wrap
*wrap
;
400 struct list_head
*tmp
;
402 command_port
= serial
->port
[COMMAND_PORT
];
404 pipe
= usb_sndbulkpipe(serial
->dev
,
405 command_port
->bulk_out_endpointAddress
);
406 command
= kmalloc(2, GFP_KERNEL
);
408 goto no_command_buffer
;
409 command
[0] = WHITEHEAT_GET_HW_INFO
;
412 result
= kmalloc(sizeof(*hw_info
) + 1, GFP_KERNEL
);
414 goto no_result_buffer
;
416 * When the module is reloaded the firmware is still there and
417 * the endpoints are still in the usb core unchanged. This is the
418 * unlinking bug in disguise. Same for the call below.
420 usb_clear_halt(serial
->dev
, pipe
);
421 ret
= usb_bulk_msg(serial
->dev
, pipe
, command
, 2,
422 &alen
, COMMAND_TIMEOUT_MS
);
424 err("%s: Couldn't send command [%d]",
425 serial
->type
->description
, ret
);
427 } else if (alen
!= 2) {
428 err("%s: Send command incomplete [%d]",
429 serial
->type
->description
, alen
);
433 pipe
= usb_rcvbulkpipe(serial
->dev
,
434 command_port
->bulk_in_endpointAddress
);
435 /* See the comment on the usb_clear_halt() above */
436 usb_clear_halt(serial
->dev
, pipe
);
437 ret
= usb_bulk_msg(serial
->dev
, pipe
, result
,
438 sizeof(*hw_info
) + 1, &alen
, COMMAND_TIMEOUT_MS
);
440 err("%s: Couldn't get results [%d]",
441 serial
->type
->description
, ret
);
443 } else if (alen
!= sizeof(*hw_info
) + 1) {
444 err("%s: Get results incomplete [%d]",
445 serial
->type
->description
, alen
);
447 } else if (result
[0] != command
[0]) {
448 err("%s: Command failed [%d]",
449 serial
->type
->description
, result
[0]);
453 hw_info
= (struct whiteheat_hw_info
*)&result
[1];
455 info("%s: Driver %s: Firmware v%d.%02d", serial
->type
->description
,
456 DRIVER_VERSION
, hw_info
->sw_major_rev
, hw_info
->sw_minor_rev
);
458 for (i
= 0; i
< serial
->num_ports
; i
++) {
459 port
= serial
->port
[i
];
461 info
= kmalloc(sizeof(struct whiteheat_private
), GFP_KERNEL
);
463 err("%s: Out of memory for port structures\n",
464 serial
->type
->description
);
468 spin_lock_init(&info
->lock
);
469 mutex_init(&info
->deathwarrant
);
472 INIT_WORK(&info
->rx_work
, rx_data_softint
);
475 INIT_LIST_HEAD(&info
->rx_urbs_free
);
476 INIT_LIST_HEAD(&info
->rx_urbs_submitted
);
477 INIT_LIST_HEAD(&info
->rx_urb_q
);
478 INIT_LIST_HEAD(&info
->tx_urbs_free
);
479 INIT_LIST_HEAD(&info
->tx_urbs_submitted
);
481 for (j
= 0; j
< urb_pool_size
; j
++) {
482 urb
= usb_alloc_urb(0, GFP_KERNEL
);
484 err("No free urbs available");
487 buf_size
= port
->read_urb
->transfer_buffer_length
;
488 urb
->transfer_buffer
= kmalloc(buf_size
, GFP_KERNEL
);
489 if (!urb
->transfer_buffer
) {
490 err("Couldn't allocate urb buffer");
493 wrap
= kmalloc(sizeof(*wrap
), GFP_KERNEL
);
495 err("Couldn't allocate urb wrapper");
498 usb_fill_bulk_urb(urb
, serial
->dev
,
499 usb_rcvbulkpipe(serial
->dev
,
500 port
->bulk_in_endpointAddress
),
501 urb
->transfer_buffer
, buf_size
,
502 whiteheat_read_callback
, port
);
504 list_add(&wrap
->list
, &info
->rx_urbs_free
);
506 urb
= usb_alloc_urb(0, GFP_KERNEL
);
508 err("No free urbs available");
511 buf_size
= port
->write_urb
->transfer_buffer_length
;
512 urb
->transfer_buffer
= kmalloc(buf_size
, GFP_KERNEL
);
513 if (!urb
->transfer_buffer
) {
514 err("Couldn't allocate urb buffer");
517 wrap
= kmalloc(sizeof(*wrap
), GFP_KERNEL
);
519 err("Couldn't allocate urb wrapper");
522 usb_fill_bulk_urb(urb
, serial
->dev
,
523 usb_sndbulkpipe(serial
->dev
,
524 port
->bulk_out_endpointAddress
),
525 urb
->transfer_buffer
, buf_size
,
526 whiteheat_write_callback
, port
);
528 list_add(&wrap
->list
, &info
->tx_urbs_free
);
531 usb_set_serial_port_data(port
, info
);
534 command_info
= kmalloc(sizeof(struct whiteheat_command_private
),
536 if (command_info
== NULL
) {
537 err("%s: Out of memory for port structures\n",
538 serial
->type
->description
);
539 goto no_command_private
;
542 mutex_init(&command_info
->mutex
);
543 command_info
->port_running
= 0;
544 init_waitqueue_head(&command_info
->wait_command
);
545 usb_set_serial_port_data(command_port
, command_info
);
546 command_port
->write_urb
->complete
= command_port_write_callback
;
547 command_port
->read_urb
->complete
= command_port_read_callback
;
554 /* Firmware likely not running */
555 err("%s: Unable to retrieve firmware version, try replugging\n",
556 serial
->type
->description
);
557 err("%s: If the firmware is not running (status led not blinking)\n",
558 serial
->type
->description
);
559 err("%s: please contact support@connecttech.com\n",
560 serial
->type
->description
);
565 for (i
= serial
->num_ports
- 1; i
>= 0; i
--) {
566 port
= serial
->port
[i
];
567 info
= usb_get_serial_port_data(port
);
568 for (j
= urb_pool_size
- 1; j
>= 0; j
--) {
569 tmp
= list_first(&info
->tx_urbs_free
);
571 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
575 kfree(urb
->transfer_buffer
);
579 tmp
= list_first(&info
->rx_urbs_free
);
581 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
585 kfree(urb
->transfer_buffer
);
603 static void whiteheat_shutdown(struct usb_serial
*serial
)
605 struct usb_serial_port
*command_port
;
606 struct usb_serial_port
*port
;
607 struct whiteheat_private
*info
;
608 struct whiteheat_urb_wrap
*wrap
;
610 struct list_head
*tmp
;
611 struct list_head
*tmp2
;
616 /* free up our private data for our command port */
617 command_port
= serial
->port
[COMMAND_PORT
];
618 kfree(usb_get_serial_port_data(command_port
));
620 for (i
= 0; i
< serial
->num_ports
; i
++) {
621 port
= serial
->port
[i
];
622 info
= usb_get_serial_port_data(port
);
623 list_for_each_safe(tmp
, tmp2
, &info
->rx_urbs_free
) {
625 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
628 kfree(urb
->transfer_buffer
);
631 list_for_each_safe(tmp
, tmp2
, &info
->tx_urbs_free
) {
633 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
636 kfree(urb
->transfer_buffer
);
645 static int whiteheat_open(struct tty_struct
*tty
,
646 struct usb_serial_port
*port
, struct file
*filp
)
649 struct ktermios old_term
;
651 dbg("%s - port %d", __func__
, port
->number
);
653 retval
= start_command_port(port
->serial
);
658 tty
->low_latency
= 1;
660 /* send an open port command */
661 retval
= firm_open(port
);
663 stop_command_port(port
->serial
);
667 retval
= firm_purge(port
, WHITEHEAT_PURGE_RX
| WHITEHEAT_PURGE_TX
);
670 stop_command_port(port
->serial
);
675 firm_setup_port(tty
);
677 /* Work around HCD bugs */
678 usb_clear_halt(port
->serial
->dev
, port
->read_urb
->pipe
);
679 usb_clear_halt(port
->serial
->dev
, port
->write_urb
->pipe
);
681 /* Start reading from the device */
682 retval
= start_port_read(port
);
684 err("%s - failed submitting read urb, error %d",
687 stop_command_port(port
->serial
);
692 dbg("%s - exit, retval = %d", __func__
, retval
);
697 static void whiteheat_close(struct tty_struct
*tty
,
698 struct usb_serial_port
*port
, struct file
*filp
)
700 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
701 struct whiteheat_urb_wrap
*wrap
;
703 struct list_head
*tmp
;
704 struct list_head
*tmp2
;
706 dbg("%s - port %d", __func__
, port
->number
);
708 mutex_lock(&port
->serial
->disc_mutex
);
709 /* filp is NULL when called from usb_serial_disconnect */
710 if ((filp
&& (tty_hung_up_p(filp
))) || port
->serial
->disconnected
) {
711 mutex_unlock(&port
->serial
->disc_mutex
);
714 mutex_unlock(&port
->serial
->disc_mutex
);
719 * Not currently in use; tty_wait_until_sent() calls
720 * serial_chars_in_buffer() which deadlocks on the second semaphore
721 * acquisition. This should be fixed at some point. Greg's been
723 if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
724 tty_wait_until_sent(tty, CLOSING_DELAY);
728 tty_driver_flush_buffer(tty
);
729 tty_ldisc_flush(tty
);
731 firm_report_tx_done(port
);
735 /* shutdown our bulk reads and writes */
736 mutex_lock(&info
->deathwarrant
);
737 spin_lock_irq(&info
->lock
);
738 list_for_each_safe(tmp
, tmp2
, &info
->rx_urbs_submitted
) {
739 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
742 spin_unlock_irq(&info
->lock
);
744 spin_lock_irq(&info
->lock
);
745 list_add(tmp
, &info
->rx_urbs_free
);
747 list_for_each_safe(tmp
, tmp2
, &info
->rx_urb_q
)
748 list_move(tmp
, &info
->rx_urbs_free
);
749 list_for_each_safe(tmp
, tmp2
, &info
->tx_urbs_submitted
) {
750 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
753 spin_unlock_irq(&info
->lock
);
755 spin_lock_irq(&info
->lock
);
756 list_add(tmp
, &info
->tx_urbs_free
);
758 spin_unlock_irq(&info
->lock
);
759 mutex_unlock(&info
->deathwarrant
);
761 stop_command_port(port
->serial
);
767 static int whiteheat_write(struct tty_struct
*tty
,
768 struct usb_serial_port
*port
, const unsigned char *buf
, int count
)
770 struct usb_serial
*serial
= port
->serial
;
771 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
772 struct whiteheat_urb_wrap
*wrap
;
778 struct list_head
*tmp
;
780 dbg("%s - port %d", __func__
, port
->number
);
783 dbg("%s - write request of 0 bytes", __func__
);
788 spin_lock_irqsave(&info
->lock
, flags
);
789 if (list_empty(&info
->tx_urbs_free
)) {
790 spin_unlock_irqrestore(&info
->lock
, flags
);
793 tmp
= list_first(&info
->tx_urbs_free
);
795 spin_unlock_irqrestore(&info
->lock
, flags
);
797 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
799 bytes
= (count
> port
->bulk_out_size
) ?
800 port
->bulk_out_size
: count
;
801 memcpy(urb
->transfer_buffer
, buf
+ sent
, bytes
);
803 usb_serial_debug_data(debug
, &port
->dev
,
804 __func__
, bytes
, urb
->transfer_buffer
);
806 urb
->dev
= serial
->dev
;
807 urb
->transfer_buffer_length
= bytes
;
808 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
810 err("%s - failed submitting write urb, error %d",
813 spin_lock_irqsave(&info
->lock
, flags
);
814 list_add(tmp
, &info
->tx_urbs_free
);
815 spin_unlock_irqrestore(&info
->lock
, flags
);
820 spin_lock_irqsave(&info
->lock
, flags
);
821 list_add(tmp
, &info
->tx_urbs_submitted
);
822 spin_unlock_irqrestore(&info
->lock
, flags
);
829 static int whiteheat_write_room(struct tty_struct
*tty
)
831 struct usb_serial_port
*port
= tty
->driver_data
;
832 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
833 struct list_head
*tmp
;
837 dbg("%s - port %d", __func__
, port
->number
);
839 spin_lock_irqsave(&info
->lock
, flags
);
840 list_for_each(tmp
, &info
->tx_urbs_free
)
842 spin_unlock_irqrestore(&info
->lock
, flags
);
843 room
*= port
->bulk_out_size
;
845 dbg("%s - returns %d", __func__
, room
);
849 static int whiteheat_tiocmget(struct tty_struct
*tty
, struct file
*file
)
851 struct usb_serial_port
*port
= tty
->driver_data
;
852 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
853 unsigned int modem_signals
= 0;
855 dbg("%s - port %d", __func__
, port
->number
);
857 firm_get_dtr_rts(port
);
858 if (info
->mcr
& UART_MCR_DTR
)
859 modem_signals
|= TIOCM_DTR
;
860 if (info
->mcr
& UART_MCR_RTS
)
861 modem_signals
|= TIOCM_RTS
;
863 return modem_signals
;
866 static int whiteheat_tiocmset(struct tty_struct
*tty
, struct file
*file
,
867 unsigned int set
, unsigned int clear
)
869 struct usb_serial_port
*port
= tty
->driver_data
;
870 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
872 dbg("%s - port %d", __func__
, port
->number
);
875 info
->mcr
|= UART_MCR_RTS
;
877 info
->mcr
|= UART_MCR_DTR
;
879 if (clear
& TIOCM_RTS
)
880 info
->mcr
&= ~UART_MCR_RTS
;
881 if (clear
& TIOCM_DTR
)
882 info
->mcr
&= ~UART_MCR_DTR
;
884 firm_set_dtr(port
, info
->mcr
& UART_MCR_DTR
);
885 firm_set_rts(port
, info
->mcr
& UART_MCR_RTS
);
890 static int whiteheat_ioctl(struct tty_struct
*tty
, struct file
*file
,
891 unsigned int cmd
, unsigned long arg
)
893 struct usb_serial_port
*port
= tty
->driver_data
;
894 struct serial_struct serstruct
;
895 void __user
*user_arg
= (void __user
*)arg
;
897 dbg("%s - port %d, cmd 0x%.4x", __func__
, port
->number
, cmd
);
901 memset(&serstruct
, 0, sizeof(serstruct
));
902 serstruct
.type
= PORT_16654
;
903 serstruct
.line
= port
->serial
->minor
;
904 serstruct
.port
= port
->number
;
905 serstruct
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
906 serstruct
.xmit_fifo_size
= port
->bulk_out_size
;
907 serstruct
.custom_divisor
= 0;
908 serstruct
.baud_base
= 460800;
909 serstruct
.close_delay
= CLOSING_DELAY
;
910 serstruct
.closing_wait
= CLOSING_DELAY
;
912 if (copy_to_user(user_arg
, &serstruct
, sizeof(serstruct
)))
923 static void whiteheat_set_termios(struct tty_struct
*tty
,
924 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
926 firm_setup_port(tty
);
929 static void whiteheat_break_ctl(struct tty_struct
*tty
, int break_state
)
931 struct usb_serial_port
*port
= tty
->driver_data
;
932 firm_set_break(port
, break_state
);
936 static int whiteheat_chars_in_buffer(struct tty_struct
*tty
)
938 struct usb_serial_port
*port
= tty
->driver_data
;
939 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
940 struct list_head
*tmp
;
941 struct whiteheat_urb_wrap
*wrap
;
945 dbg("%s - port %d", __func__
, port
->number
);
947 spin_lock_irqsave(&info
->lock
, flags
);
948 list_for_each(tmp
, &info
->tx_urbs_submitted
) {
949 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
950 chars
+= wrap
->urb
->transfer_buffer_length
;
952 spin_unlock_irqrestore(&info
->lock
, flags
);
954 dbg("%s - returns %d", __func__
, chars
);
959 static void whiteheat_throttle(struct tty_struct
*tty
)
961 struct usb_serial_port
*port
= tty
->driver_data
;
962 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
965 dbg("%s - port %d", __func__
, port
->number
);
967 spin_lock_irqsave(&info
->lock
, flags
);
968 info
->flags
|= THROTTLED
;
969 spin_unlock_irqrestore(&info
->lock
, flags
);
975 static void whiteheat_unthrottle(struct tty_struct
*tty
)
977 struct usb_serial_port
*port
= tty
->driver_data
;
978 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
979 int actually_throttled
;
982 dbg("%s - port %d", __func__
, port
->number
);
984 spin_lock_irqsave(&info
->lock
, flags
);
985 actually_throttled
= info
->flags
& ACTUALLY_THROTTLED
;
986 info
->flags
&= ~(THROTTLED
| ACTUALLY_THROTTLED
);
987 spin_unlock_irqrestore(&info
->lock
, flags
);
989 if (actually_throttled
)
990 rx_data_softint(&info
->rx_work
);
996 /*****************************************************************************
997 * Connect Tech's White Heat callback routines
998 *****************************************************************************/
999 static void command_port_write_callback(struct urb
*urb
)
1001 int status
= urb
->status
;
1003 dbg("%s", __func__
);
1006 dbg("nonzero urb status: %d", status
);
1012 static void command_port_read_callback(struct urb
*urb
)
1014 struct usb_serial_port
*command_port
= urb
->context
;
1015 struct whiteheat_command_private
*command_info
;
1016 int status
= urb
->status
;
1017 unsigned char *data
= urb
->transfer_buffer
;
1020 dbg("%s", __func__
);
1022 command_info
= usb_get_serial_port_data(command_port
);
1023 if (!command_info
) {
1024 dbg("%s - command_info is NULL, exiting.", __func__
);
1028 dbg("%s - nonzero urb status: %d", __func__
, status
);
1029 if (status
!= -ENOENT
)
1030 command_info
->command_finished
= WHITEHEAT_CMD_FAILURE
;
1031 wake_up(&command_info
->wait_command
);
1035 usb_serial_debug_data(debug
, &command_port
->dev
,
1036 __func__
, urb
->actual_length
, data
);
1038 if (data
[0] == WHITEHEAT_CMD_COMPLETE
) {
1039 command_info
->command_finished
= WHITEHEAT_CMD_COMPLETE
;
1040 wake_up(&command_info
->wait_command
);
1041 } else if (data
[0] == WHITEHEAT_CMD_FAILURE
) {
1042 command_info
->command_finished
= WHITEHEAT_CMD_FAILURE
;
1043 wake_up(&command_info
->wait_command
);
1044 } else if (data
[0] == WHITEHEAT_EVENT
) {
1045 /* These are unsolicited reports from the firmware, hence no
1046 waiting command to wakeup */
1047 dbg("%s - event received", __func__
);
1048 } else if (data
[0] == WHITEHEAT_GET_DTR_RTS
) {
1049 memcpy(command_info
->result_buffer
, &data
[1],
1050 urb
->actual_length
- 1);
1051 command_info
->command_finished
= WHITEHEAT_CMD_COMPLETE
;
1052 wake_up(&command_info
->wait_command
);
1054 dbg("%s - bad reply from firmware", __func__
);
1056 /* Continue trying to always read */
1057 command_port
->read_urb
->dev
= command_port
->serial
->dev
;
1058 result
= usb_submit_urb(command_port
->read_urb
, GFP_ATOMIC
);
1060 dbg("%s - failed resubmitting read urb, error %d",
1065 static void whiteheat_read_callback(struct urb
*urb
)
1067 struct usb_serial_port
*port
= urb
->context
;
1068 struct whiteheat_urb_wrap
*wrap
;
1069 unsigned char *data
= urb
->transfer_buffer
;
1070 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
1071 int status
= urb
->status
;
1073 dbg("%s - port %d", __func__
, port
->number
);
1075 spin_lock(&info
->lock
);
1076 wrap
= urb_to_wrap(urb
, &info
->rx_urbs_submitted
);
1078 spin_unlock(&info
->lock
);
1079 err("%s - Not my urb!", __func__
);
1082 list_del(&wrap
->list
);
1083 spin_unlock(&info
->lock
);
1086 dbg("%s - nonzero read bulk status received: %d",
1088 spin_lock(&info
->lock
);
1089 list_add(&wrap
->list
, &info
->rx_urbs_free
);
1090 spin_unlock(&info
->lock
);
1094 usb_serial_debug_data(debug
, &port
->dev
,
1095 __func__
, urb
->actual_length
, data
);
1097 spin_lock(&info
->lock
);
1098 list_add_tail(&wrap
->list
, &info
->rx_urb_q
);
1099 if (info
->flags
& THROTTLED
) {
1100 info
->flags
|= ACTUALLY_THROTTLED
;
1101 spin_unlock(&info
->lock
);
1104 spin_unlock(&info
->lock
);
1106 schedule_work(&info
->rx_work
);
1110 static void whiteheat_write_callback(struct urb
*urb
)
1112 struct usb_serial_port
*port
= urb
->context
;
1113 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
1114 struct whiteheat_urb_wrap
*wrap
;
1115 int status
= urb
->status
;
1117 dbg("%s - port %d", __func__
, port
->number
);
1119 spin_lock(&info
->lock
);
1120 wrap
= urb_to_wrap(urb
, &info
->tx_urbs_submitted
);
1122 spin_unlock(&info
->lock
);
1123 err("%s - Not my urb!", __func__
);
1126 list_move(&wrap
->list
, &info
->tx_urbs_free
);
1127 spin_unlock(&info
->lock
);
1130 dbg("%s - nonzero write bulk status received: %d",
1135 usb_serial_port_softint(port
);
1139 /*****************************************************************************
1140 * Connect Tech's White Heat firmware interface
1141 *****************************************************************************/
1142 static int firm_send_command(struct usb_serial_port
*port
, __u8 command
,
1143 __u8
*data
, __u8 datasize
)
1145 struct usb_serial_port
*command_port
;
1146 struct whiteheat_command_private
*command_info
;
1147 struct whiteheat_private
*info
;
1148 __u8
*transfer_buffer
;
1152 dbg("%s - command %d", __func__
, command
);
1154 command_port
= port
->serial
->port
[COMMAND_PORT
];
1155 command_info
= usb_get_serial_port_data(command_port
);
1156 mutex_lock(&command_info
->mutex
);
1157 command_info
->command_finished
= false;
1159 transfer_buffer
= (__u8
*)command_port
->write_urb
->transfer_buffer
;
1160 transfer_buffer
[0] = command
;
1161 memcpy(&transfer_buffer
[1], data
, datasize
);
1162 command_port
->write_urb
->transfer_buffer_length
= datasize
+ 1;
1163 command_port
->write_urb
->dev
= port
->serial
->dev
;
1164 retval
= usb_submit_urb(command_port
->write_urb
, GFP_NOIO
);
1166 dbg("%s - submit urb failed", __func__
);
1170 /* wait for the command to complete */
1171 t
= wait_event_timeout(command_info
->wait_command
,
1172 (bool)command_info
->command_finished
, COMMAND_TIMEOUT
);
1174 usb_kill_urb(command_port
->write_urb
);
1176 if (command_info
->command_finished
== false) {
1177 dbg("%s - command timed out.", __func__
);
1178 retval
= -ETIMEDOUT
;
1182 if (command_info
->command_finished
== WHITEHEAT_CMD_FAILURE
) {
1183 dbg("%s - command failed.", __func__
);
1188 if (command_info
->command_finished
== WHITEHEAT_CMD_COMPLETE
) {
1189 dbg("%s - command completed.", __func__
);
1191 case WHITEHEAT_GET_DTR_RTS
:
1192 info
= usb_get_serial_port_data(port
);
1193 memcpy(&info
->mcr
, command_info
->result_buffer
,
1194 sizeof(struct whiteheat_dr_info
));
1199 mutex_unlock(&command_info
->mutex
);
1204 static int firm_open(struct usb_serial_port
*port
)
1206 struct whiteheat_simple open_command
;
1208 open_command
.port
= port
->number
- port
->serial
->minor
+ 1;
1209 return firm_send_command(port
, WHITEHEAT_OPEN
,
1210 (__u8
*)&open_command
, sizeof(open_command
));
1214 static int firm_close(struct usb_serial_port
*port
)
1216 struct whiteheat_simple close_command
;
1218 close_command
.port
= port
->number
- port
->serial
->minor
+ 1;
1219 return firm_send_command(port
, WHITEHEAT_CLOSE
,
1220 (__u8
*)&close_command
, sizeof(close_command
));
1224 static int firm_setup_port(struct tty_struct
*tty
)
1226 struct usb_serial_port
*port
= tty
->driver_data
;
1227 struct whiteheat_port_settings port_settings
;
1228 unsigned int cflag
= tty
->termios
->c_cflag
;
1230 port_settings
.port
= port
->number
+ 1;
1232 /* get the byte size */
1233 switch (cflag
& CSIZE
) {
1234 case CS5
: port_settings
.bits
= 5; break;
1235 case CS6
: port_settings
.bits
= 6; break;
1236 case CS7
: port_settings
.bits
= 7; break;
1238 case CS8
: port_settings
.bits
= 8; break;
1240 dbg("%s - data bits = %d", __func__
, port_settings
.bits
);
1242 /* determine the parity */
1246 port_settings
.parity
= WHITEHEAT_PAR_MARK
;
1248 port_settings
.parity
= WHITEHEAT_PAR_SPACE
;
1251 port_settings
.parity
= WHITEHEAT_PAR_ODD
;
1253 port_settings
.parity
= WHITEHEAT_PAR_EVEN
;
1255 port_settings
.parity
= WHITEHEAT_PAR_NONE
;
1256 dbg("%s - parity = %c", __func__
, port_settings
.parity
);
1258 /* figure out the stop bits requested */
1260 port_settings
.stop
= 2;
1262 port_settings
.stop
= 1;
1263 dbg("%s - stop bits = %d", __func__
, port_settings
.stop
);
1265 /* figure out the flow control settings */
1266 if (cflag
& CRTSCTS
)
1267 port_settings
.hflow
= (WHITEHEAT_HFLOW_CTS
|
1268 WHITEHEAT_HFLOW_RTS
);
1270 port_settings
.hflow
= WHITEHEAT_HFLOW_NONE
;
1271 dbg("%s - hardware flow control = %s %s %s %s", __func__
,
1272 (port_settings
.hflow
& WHITEHEAT_HFLOW_CTS
) ? "CTS" : "",
1273 (port_settings
.hflow
& WHITEHEAT_HFLOW_RTS
) ? "RTS" : "",
1274 (port_settings
.hflow
& WHITEHEAT_HFLOW_DSR
) ? "DSR" : "",
1275 (port_settings
.hflow
& WHITEHEAT_HFLOW_DTR
) ? "DTR" : "");
1277 /* determine software flow control */
1279 port_settings
.sflow
= WHITEHEAT_SFLOW_RXTX
;
1281 port_settings
.sflow
= WHITEHEAT_SFLOW_NONE
;
1282 dbg("%s - software flow control = %c", __func__
, port_settings
.sflow
);
1284 port_settings
.xon
= START_CHAR(tty
);
1285 port_settings
.xoff
= STOP_CHAR(tty
);
1286 dbg("%s - XON = %2x, XOFF = %2x",
1287 __func__
, port_settings
.xon
, port_settings
.xoff
);
1289 /* get the baud rate wanted */
1290 port_settings
.baud
= tty_get_baud_rate(tty
);
1291 dbg("%s - baud rate = %d", __func__
, port_settings
.baud
);
1293 /* fixme: should set validated settings */
1294 tty_encode_baud_rate(tty
, port_settings
.baud
, port_settings
.baud
);
1295 /* handle any settings that aren't specified in the tty structure */
1296 port_settings
.lloop
= 0;
1298 /* now send the message to the device */
1299 return firm_send_command(port
, WHITEHEAT_SETUP_PORT
,
1300 (__u8
*)&port_settings
, sizeof(port_settings
));
1304 static int firm_set_rts(struct usb_serial_port
*port
, __u8 onoff
)
1306 struct whiteheat_set_rdb rts_command
;
1308 rts_command
.port
= port
->number
- port
->serial
->minor
+ 1;
1309 rts_command
.state
= onoff
;
1310 return firm_send_command(port
, WHITEHEAT_SET_RTS
,
1311 (__u8
*)&rts_command
, sizeof(rts_command
));
1315 static int firm_set_dtr(struct usb_serial_port
*port
, __u8 onoff
)
1317 struct whiteheat_set_rdb dtr_command
;
1319 dtr_command
.port
= port
->number
- port
->serial
->minor
+ 1;
1320 dtr_command
.state
= onoff
;
1321 return firm_send_command(port
, WHITEHEAT_SET_DTR
,
1322 (__u8
*)&dtr_command
, sizeof(dtr_command
));
1326 static int firm_set_break(struct usb_serial_port
*port
, __u8 onoff
)
1328 struct whiteheat_set_rdb break_command
;
1330 break_command
.port
= port
->number
- port
->serial
->minor
+ 1;
1331 break_command
.state
= onoff
;
1332 return firm_send_command(port
, WHITEHEAT_SET_BREAK
,
1333 (__u8
*)&break_command
, sizeof(break_command
));
1337 static int firm_purge(struct usb_serial_port
*port
, __u8 rxtx
)
1339 struct whiteheat_purge purge_command
;
1341 purge_command
.port
= port
->number
- port
->serial
->minor
+ 1;
1342 purge_command
.what
= rxtx
;
1343 return firm_send_command(port
, WHITEHEAT_PURGE
,
1344 (__u8
*)&purge_command
, sizeof(purge_command
));
1348 static int firm_get_dtr_rts(struct usb_serial_port
*port
)
1350 struct whiteheat_simple get_dr_command
;
1352 get_dr_command
.port
= port
->number
- port
->serial
->minor
+ 1;
1353 return firm_send_command(port
, WHITEHEAT_GET_DTR_RTS
,
1354 (__u8
*)&get_dr_command
, sizeof(get_dr_command
));
1358 static int firm_report_tx_done(struct usb_serial_port
*port
)
1360 struct whiteheat_simple close_command
;
1362 close_command
.port
= port
->number
- port
->serial
->minor
+ 1;
1363 return firm_send_command(port
, WHITEHEAT_REPORT_TX_DONE
,
1364 (__u8
*)&close_command
, sizeof(close_command
));
1368 /*****************************************************************************
1369 * Connect Tech's White Heat utility functions
1370 *****************************************************************************/
1371 static int start_command_port(struct usb_serial
*serial
)
1373 struct usb_serial_port
*command_port
;
1374 struct whiteheat_command_private
*command_info
;
1377 command_port
= serial
->port
[COMMAND_PORT
];
1378 command_info
= usb_get_serial_port_data(command_port
);
1379 mutex_lock(&command_info
->mutex
);
1380 if (!command_info
->port_running
) {
1381 /* Work around HCD bugs */
1382 usb_clear_halt(serial
->dev
, command_port
->read_urb
->pipe
);
1384 command_port
->read_urb
->dev
= serial
->dev
;
1385 retval
= usb_submit_urb(command_port
->read_urb
, GFP_KERNEL
);
1387 err("%s - failed submitting read urb, error %d",
1392 command_info
->port_running
++;
1395 mutex_unlock(&command_info
->mutex
);
1400 static void stop_command_port(struct usb_serial
*serial
)
1402 struct usb_serial_port
*command_port
;
1403 struct whiteheat_command_private
*command_info
;
1405 command_port
= serial
->port
[COMMAND_PORT
];
1406 command_info
= usb_get_serial_port_data(command_port
);
1407 mutex_lock(&command_info
->mutex
);
1408 command_info
->port_running
--;
1409 if (!command_info
->port_running
)
1410 usb_kill_urb(command_port
->read_urb
);
1411 mutex_unlock(&command_info
->mutex
);
1415 static int start_port_read(struct usb_serial_port
*port
)
1417 struct whiteheat_private
*info
= usb_get_serial_port_data(port
);
1418 struct whiteheat_urb_wrap
*wrap
;
1421 unsigned long flags
;
1422 struct list_head
*tmp
;
1423 struct list_head
*tmp2
;
1425 spin_lock_irqsave(&info
->lock
, flags
);
1427 list_for_each_safe(tmp
, tmp2
, &info
->rx_urbs_free
) {
1429 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
1431 urb
->dev
= port
->serial
->dev
;
1432 spin_unlock_irqrestore(&info
->lock
, flags
);
1433 retval
= usb_submit_urb(urb
, GFP_KERNEL
);
1435 spin_lock_irqsave(&info
->lock
, flags
);
1436 list_add(tmp
, &info
->rx_urbs_free
);
1437 list_for_each_safe(tmp
, tmp2
, &info
->rx_urbs_submitted
) {
1438 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
1441 spin_unlock_irqrestore(&info
->lock
, flags
);
1443 spin_lock_irqsave(&info
->lock
, flags
);
1444 list_add(tmp
, &info
->rx_urbs_free
);
1448 spin_lock_irqsave(&info
->lock
, flags
);
1449 list_add(tmp
, &info
->rx_urbs_submitted
);
1452 spin_unlock_irqrestore(&info
->lock
, flags
);
1458 static struct whiteheat_urb_wrap
*urb_to_wrap(struct urb
*urb
,
1459 struct list_head
*head
)
1461 struct whiteheat_urb_wrap
*wrap
;
1462 struct list_head
*tmp
;
1464 list_for_each(tmp
, head
) {
1465 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
1466 if (wrap
->urb
== urb
)
1474 static struct list_head
*list_first(struct list_head
*head
)
1480 static void rx_data_softint(struct work_struct
*work
)
1482 struct whiteheat_private
*info
=
1483 container_of(work
, struct whiteheat_private
, rx_work
);
1484 struct usb_serial_port
*port
= info
->port
;
1485 struct tty_struct
*tty
= port
->port
.tty
;
1486 struct whiteheat_urb_wrap
*wrap
;
1488 unsigned long flags
;
1489 struct list_head
*tmp
;
1490 struct list_head
*tmp2
;
1494 spin_lock_irqsave(&info
->lock
, flags
);
1495 if (info
->flags
& THROTTLED
) {
1496 spin_unlock_irqrestore(&info
->lock
, flags
);
1500 list_for_each_safe(tmp
, tmp2
, &info
->rx_urb_q
) {
1502 spin_unlock_irqrestore(&info
->lock
, flags
);
1504 wrap
= list_entry(tmp
, struct whiteheat_urb_wrap
, list
);
1507 if (tty
&& urb
->actual_length
) {
1508 int len
= tty_buffer_request_room(tty
,
1509 urb
->actual_length
);
1510 /* This stuff can go away now I suspect */
1511 if (unlikely(len
< urb
->actual_length
)) {
1512 spin_lock_irqsave(&info
->lock
, flags
);
1513 list_add(tmp
, &info
->rx_urb_q
);
1514 spin_unlock_irqrestore(&info
->lock
, flags
);
1515 tty_flip_buffer_push(tty
);
1516 schedule_work(&info
->rx_work
);
1519 tty_insert_flip_string(tty
, urb
->transfer_buffer
, len
);
1523 urb
->dev
= port
->serial
->dev
;
1524 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
1526 err("%s - failed resubmitting read urb, error %d",
1528 spin_lock_irqsave(&info
->lock
, flags
);
1529 list_add(tmp
, &info
->rx_urbs_free
);
1533 spin_lock_irqsave(&info
->lock
, flags
);
1534 list_add(tmp
, &info
->rx_urbs_submitted
);
1536 spin_unlock_irqrestore(&info
->lock
, flags
);
1539 tty_flip_buffer_push(tty
);
1543 /*****************************************************************************
1544 * Connect Tech's White Heat module functions
1545 *****************************************************************************/
1546 static int __init
whiteheat_init(void)
1549 retval
= usb_serial_register(&whiteheat_fake_device
);
1551 goto failed_fake_register
;
1552 retval
= usb_serial_register(&whiteheat_device
);
1554 goto failed_device_register
;
1555 retval
= usb_register(&whiteheat_driver
);
1557 goto failed_usb_register
;
1558 info(DRIVER_DESC
" " DRIVER_VERSION
);
1560 failed_usb_register
:
1561 usb_serial_deregister(&whiteheat_device
);
1562 failed_device_register
:
1563 usb_serial_deregister(&whiteheat_fake_device
);
1564 failed_fake_register
:
1569 static void __exit
whiteheat_exit(void)
1571 usb_deregister(&whiteheat_driver
);
1572 usb_serial_deregister(&whiteheat_fake_device
);
1573 usb_serial_deregister(&whiteheat_device
);
1577 module_init(whiteheat_init
);
1578 module_exit(whiteheat_exit
);
1580 MODULE_AUTHOR(DRIVER_AUTHOR
);
1581 MODULE_DESCRIPTION(DRIVER_DESC
);
1582 MODULE_LICENSE("GPL");
1584 MODULE_FIRMWARE("whiteheat.fw");
1585 MODULE_FIRMWARE("whiteheat_loader.fw");
1587 module_param(urb_pool_size
, int, 0);
1588 MODULE_PARM_DESC(urb_pool_size
, "Number of urbs to use for buffering");
1590 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
1591 MODULE_PARM_DESC(debug
, "Debug enabled or not");