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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / usb / serial / ti_usb_3410_5052.c
blobb517f93352ec414d8ee52258b5965868ea2fb5f2
1 /* vi: ts=8 sw=8
2 *
3 * TI 3410/5052 USB Serial Driver
4 *
5 * Copyright (C) 2004 Texas Instruments
6 *
7 * This driver is based on the Linux io_ti driver, which is
8 * Copyright (C) 2000-2002 Inside Out Networks
9 * Copyright (C) 2001-2002 Greg Kroah-Hartman
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * For questions or problems with this driver, contact Texas Instruments
17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18 * Peter Berger <pberger@brimson.com>.
19 *
20 * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
21 * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
22 * configuration.
23 *
24 * #!/bin/bash
25 *
26 * BOOT_CONFIG=1
27 * ACTIVE_CONFIG=2
28 *
29 * if [[ "$ACTION" != "add" ]]
30 * then
31 * exit
32 * fi
33 *
34 * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
35 *
36 * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
37 * then
38 * exit
39 * fi
40 *
41 * PRODUCT=${PRODUCT%/?*} # delete version
42 * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
43 * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
44 *
45 * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
46 *
47 * function scan() {
48 * s=$1
49 * shift
50 * for i
51 * do
52 * if [[ $s -eq $i ]]
53 * then
54 * return 0
55 * fi
56 * done
57 * return 1
58 * }
59 *
60 * IFS=$IFS,
61 *
62 * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
63 * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
64 * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
65 * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
66 * then
67 * echo $ACTIVE_CONFIG > $CONFIG_PATH
68 * fi
69 */
70
71 #include <linux/kernel.h>
72 #include <linux/errno.h>
73 #include <linux/init.h>
74 #include <linux/slab.h>
75 #include <linux/tty.h>
76 #include <linux/tty_driver.h>
77 #include <linux/tty_flip.h>
78 #include <linux/module.h>
79 #include <linux/spinlock.h>
80 #include <linux/ioctl.h>
81 #include <linux/serial.h>
82 #include <linux/circ_buf.h>
83 #include <linux/mutex.h>
84 #include <asm/uaccess.h>
85 #include <asm/semaphore.h>
86 #include <linux/usb.h>
87 #include <linux/usb/serial.h>
88
89 #include "ti_usb_3410_5052.h"
90 #include "ti_fw_3410.h" /* firmware image for 3410 */
91 #include "ti_fw_5052.h" /* firmware image for 5052 */
92
93
94 /* Defines */
95
96 #define TI_DRIVER_VERSION "v0.9"
97 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
98 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
99
100 #define TI_FIRMWARE_BUF_SIZE 16284
101
102 #define TI_WRITE_BUF_SIZE 1024
103
104 #define TI_TRANSFER_TIMEOUT 2
105
106 #define TI_DEFAULT_LOW_LATENCY 0
107 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
108
109 /* supported setserial flags */
110 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
111
112 /* read urb states */
113 #define TI_READ_URB_RUNNING 0
114 #define TI_READ_URB_STOPPING 1
115 #define TI_READ_URB_STOPPED 2
116
117 #define TI_EXTRA_VID_PID_COUNT 5
118
119
120 /* Structures */
121
122 struct ti_port {
123 int tp_is_open;
124 __u8 tp_msr;
125 __u8 tp_lsr;
126 __u8 tp_shadow_mcr;
127 __u8 tp_uart_mode; /* 232 or 485 modes */
128 unsigned int tp_uart_base_addr;
129 int tp_flags;
130 int tp_closing_wait;/* in .01 secs */
131 struct async_icount tp_icount;
132 wait_queue_head_t tp_msr_wait; /* wait for msr change */
133 wait_queue_head_t tp_write_wait;
134 struct ti_device *tp_tdev;
135 struct usb_serial_port *tp_port;
136 spinlock_t tp_lock;
137 int tp_read_urb_state;
138 int tp_write_urb_in_use;
139 struct circ_buf *tp_write_buf;
140 };
141
142 struct ti_device {
143 struct mutex td_open_close_lock;
144 int td_open_port_count;
145 struct usb_serial *td_serial;
146 int td_is_3410;
147 int td_urb_error;
148 };
149
150
151 /* Function Declarations */
152
153 static int ti_startup(struct usb_serial *serial);
154 static void ti_shutdown(struct usb_serial *serial);
155 static int ti_open(struct usb_serial_port *port, struct file *file);
156 static void ti_close(struct usb_serial_port *port, struct file *file);
157 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
158 int count);
159 static int ti_write_room(struct usb_serial_port *port);
160 static int ti_chars_in_buffer(struct usb_serial_port *port);
161 static void ti_throttle(struct usb_serial_port *port);
162 static void ti_unthrottle(struct usb_serial_port *port);
163 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
164 static void ti_set_termios(struct usb_serial_port *port,
165 struct ktermios *old_termios);
166 static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
167 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
168 unsigned int set, unsigned int clear);
169 static void ti_break(struct usb_serial_port *port, int break_state);
170 static void ti_interrupt_callback(struct urb *urb);
171 static void ti_bulk_in_callback(struct urb *urb);
172 static void ti_bulk_out_callback(struct urb *urb);
173
174 static void ti_recv(struct device *dev, struct tty_struct *tty,
175 unsigned char *data, int length);
176 static void ti_send(struct ti_port *tport);
177 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
178 static int ti_get_lsr(struct ti_port *tport);
179 static int ti_get_serial_info(struct ti_port *tport,
180 struct serial_struct __user *ret_arg);
181 static int ti_set_serial_info(struct ti_port *tport,
182 struct serial_struct __user *new_arg);
183 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
184
185 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
186
187 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
188 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
189
190 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
191 __u16 moduleid, __u16 value, __u8 *data, int size);
192 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
193 __u16 moduleid, __u16 value, __u8 *data, int size);
194
195 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
196 __u8 mask, __u8 byte);
197
198 static int ti_download_firmware(struct ti_device *tdev,
199 unsigned char *firmware, unsigned int firmware_size);
200
201 /* circular buffer */
202 static struct circ_buf *ti_buf_alloc(void);
203 static void ti_buf_free(struct circ_buf *cb);
204 static void ti_buf_clear(struct circ_buf *cb);
205 static int ti_buf_data_avail(struct circ_buf *cb);
206 static int ti_buf_space_avail(struct circ_buf *cb);
207 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
208 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
209
210
211 /* Data */
212
213 /* module parameters */
214 static int debug;
215 static int low_latency = TI_DEFAULT_LOW_LATENCY;
216 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
217 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
218 static unsigned int vendor_3410_count;
219 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
220 static unsigned int product_3410_count;
221 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
222 static unsigned int vendor_5052_count;
223 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
224 static unsigned int product_5052_count;
225
226 /* supported devices */
227 /* the array dimension is the number of default entries plus */
228 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
229 /* null entry */
230 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
231 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
232 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
233 };
234
235 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
236 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
237 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
238 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
239 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
240 };
241
242 static struct usb_device_id ti_id_table_combined[] = {
243 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
244 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
245 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
246 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
247 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
248 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
249 { }
250 };
251
252 static struct usb_driver ti_usb_driver = {
253 .name = "ti_usb_3410_5052",
254 .probe = usb_serial_probe,
255 .disconnect = usb_serial_disconnect,
256 .id_table = ti_id_table_combined,
257 .no_dynamic_id = 1,
258 };
259
260 static struct usb_serial_driver ti_1port_device = {
261 .driver = {
262 .owner = THIS_MODULE,
263 .name = "ti_usb_3410_5052_1",
264 },
265 .description = "TI USB 3410 1 port adapter",
266 .usb_driver = &ti_usb_driver,
267 .id_table = ti_id_table_3410,
268 .num_interrupt_in = 1,
269 .num_bulk_in = 1,
270 .num_bulk_out = 1,
271 .num_ports = 1,
272 .attach = ti_startup,
273 .shutdown = ti_shutdown,
274 .open = ti_open,
275 .close = ti_close,
276 .write = ti_write,
277 .write_room = ti_write_room,
278 .chars_in_buffer = ti_chars_in_buffer,
279 .throttle = ti_throttle,
280 .unthrottle = ti_unthrottle,
281 .ioctl = ti_ioctl,
282 .set_termios = ti_set_termios,
283 .tiocmget = ti_tiocmget,
284 .tiocmset = ti_tiocmset,
285 .break_ctl = ti_break,
286 .read_int_callback = ti_interrupt_callback,
287 .read_bulk_callback = ti_bulk_in_callback,
288 .write_bulk_callback = ti_bulk_out_callback,
289 };
290
291 static struct usb_serial_driver ti_2port_device = {
292 .driver = {
293 .owner = THIS_MODULE,
294 .name = "ti_usb_3410_5052_2",
295 },
296 .description = "TI USB 5052 2 port adapter",
297 .usb_driver = &ti_usb_driver,
298 .id_table = ti_id_table_5052,
299 .num_interrupt_in = 1,
300 .num_bulk_in = 2,
301 .num_bulk_out = 2,
302 .num_ports = 2,
303 .attach = ti_startup,
304 .shutdown = ti_shutdown,
305 .open = ti_open,
306 .close = ti_close,
307 .write = ti_write,
308 .write_room = ti_write_room,
309 .chars_in_buffer = ti_chars_in_buffer,
310 .throttle = ti_throttle,
311 .unthrottle = ti_unthrottle,
312 .ioctl = ti_ioctl,
313 .set_termios = ti_set_termios,
314 .tiocmget = ti_tiocmget,
315 .tiocmset = ti_tiocmset,
316 .break_ctl = ti_break,
317 .read_int_callback = ti_interrupt_callback,
318 .read_bulk_callback = ti_bulk_in_callback,
319 .write_bulk_callback = ti_bulk_out_callback,
320 };
321
322
323 /* Module */
324
325 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
326 MODULE_DESCRIPTION(TI_DRIVER_DESC);
327 MODULE_VERSION(TI_DRIVER_VERSION);
328 MODULE_LICENSE("GPL");
329
330 module_param(debug, bool, S_IRUGO | S_IWUSR);
331 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
332
333 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
334 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
335
336 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
337 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
338
339 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
340 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
341 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
342 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
343 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
344 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
345 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
346 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
347
348 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
349
350
351 /* Functions */
352
353 static int __init ti_init(void)
354 {
355 int i,j;
356 int ret;
357
358 /* insert extra vendor and product ids */
359 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
360 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
361 ti_id_table_3410[j].idVendor = vendor_3410[i];
362 ti_id_table_3410[j].idProduct = product_3410[i];
363 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
364 }
365 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
366 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
367 ti_id_table_5052[j].idVendor = vendor_5052[i];
368 ti_id_table_5052[j].idProduct = product_5052[i];
369 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
370 }
371
372 ret = usb_serial_register(&ti_1port_device);
373 if (ret)
374 goto failed_1port;
375 ret = usb_serial_register(&ti_2port_device);
376 if (ret)
377 goto failed_2port;
378
379 ret = usb_register(&ti_usb_driver);
380 if (ret)
381 goto failed_usb;
382
383 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
384
385 return 0;
386
387 failed_usb:
388 usb_serial_deregister(&ti_2port_device);
389 failed_2port:
390 usb_serial_deregister(&ti_1port_device);
391 failed_1port:
392 return ret;
393 }
394
395
396 static void __exit ti_exit(void)
397 {
398 usb_serial_deregister(&ti_1port_device);
399 usb_serial_deregister(&ti_2port_device);
400 usb_deregister(&ti_usb_driver);
401 }
402
403
404 module_init(ti_init);
405 module_exit(ti_exit);
406
407
408 static int ti_startup(struct usb_serial *serial)
409 {
410 struct ti_device *tdev;
411 struct ti_port *tport;
412 struct usb_device *dev = serial->dev;
413 int status;
414 int i;
415
416
417 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
418 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
419 dev->descriptor.bNumConfigurations,
420 dev->actconfig->desc.bConfigurationValue);
421
422 /* create device structure */
423 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
424 if (tdev == NULL) {
425 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
426 return -ENOMEM;
427 }
428 mutex_init(&tdev->td_open_close_lock);
429 tdev->td_serial = serial;
430 usb_set_serial_data(serial, tdev);
431
432 /* determine device type */
433 if (usb_match_id(serial->interface, ti_id_table_3410))
434 tdev->td_is_3410 = 1;
435 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
436
437 /* if we have only 1 configuration, download firmware */
438 if (dev->descriptor.bNumConfigurations == 1) {
439
440 if (tdev->td_is_3410)
441 status = ti_download_firmware(tdev, ti_fw_3410,
442 sizeof(ti_fw_3410));
443 else
444 status = ti_download_firmware(tdev, ti_fw_5052,
445 sizeof(ti_fw_5052));
446 if (status)
447 goto free_tdev;
448
449 /* 3410 must be reset, 5052 resets itself */
450 if (tdev->td_is_3410) {
451 msleep_interruptible(100);
452 usb_reset_device(dev);
453 }
454
455 status = -ENODEV;
456 goto free_tdev;
457 }
458
459 /* the second configuration must be set (in sysfs by hotplug script) */
460 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
461 status = -ENODEV;
462 goto free_tdev;
463 }
464
465 /* set up port structures */
466 for (i = 0; i < serial->num_ports; ++i) {
467 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
468 if (tport == NULL) {
469 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
470 status = -ENOMEM;
471 goto free_tports;
472 }
473 spin_lock_init(&tport->tp_lock);
474 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
475 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
476 tport->tp_closing_wait = closing_wait;
477 init_waitqueue_head(&tport->tp_msr_wait);
478 init_waitqueue_head(&tport->tp_write_wait);
479 tport->tp_write_buf = ti_buf_alloc();
480 if (tport->tp_write_buf == NULL) {
481 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
482 kfree(tport);
483 status = -ENOMEM;
484 goto free_tports;
485 }
486 tport->tp_port = serial->port[i];
487 tport->tp_tdev = tdev;
488 usb_set_serial_port_data(serial->port[i], tport);
489 tport->tp_uart_mode = 0; /* default is RS232 */
490 }
491
492 return 0;
493
494 free_tports:
495 for (--i; i>=0; --i) {
496 tport = usb_get_serial_port_data(serial->port[i]);
497 ti_buf_free(tport->tp_write_buf);
498 kfree(tport);
499 usb_set_serial_port_data(serial->port[i], NULL);
500 }
501 free_tdev:
502 kfree(tdev);
503 usb_set_serial_data(serial, NULL);
504 return status;
505 }
506
507
508 static void ti_shutdown(struct usb_serial *serial)
509 {
510 int i;
511 struct ti_device *tdev = usb_get_serial_data(serial);
512 struct ti_port *tport;
513
514 dbg("%s", __FUNCTION__);
515
516 for (i=0; i < serial->num_ports; ++i) {
517 tport = usb_get_serial_port_data(serial->port[i]);
518 if (tport) {
519 ti_buf_free(tport->tp_write_buf);
520 kfree(tport);
521 usb_set_serial_port_data(serial->port[i], NULL);
522 }
523 }
524
525 kfree(tdev);
526 usb_set_serial_data(serial, NULL);
527 }
528
529
530 static int ti_open(struct usb_serial_port *port, struct file *file)
531 {
532 struct ti_port *tport = usb_get_serial_port_data(port);
533 struct ti_device *tdev;
534 struct usb_device *dev;
535 struct urb *urb;
536 int port_number;
537 int status;
538 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
539 TI_PIPE_TIMEOUT_ENABLE |
540 (TI_TRANSFER_TIMEOUT << 2));
541
542 dbg("%s - port %d", __FUNCTION__, port->number);
543
544 if (tport == NULL)
545 return -ENODEV;
546
547 dev = port->serial->dev;
548 tdev = tport->tp_tdev;
549
550 /* only one open on any port on a device at a time */
551 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
552 return -ERESTARTSYS;
553
554 if (port->tty)
555 port->tty->low_latency =
556 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
557
558 port_number = port->number - port->serial->minor;
559
560 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
561
562 tport->tp_msr = 0;
563 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
564
565 /* start interrupt urb the first time a port is opened on this device */
566 if (tdev->td_open_port_count == 0) {
567 dbg("%s - start interrupt in urb", __FUNCTION__);
568 urb = tdev->td_serial->port[0]->interrupt_in_urb;
569 if (!urb) {
570 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
571 status = -EINVAL;
572 goto release_lock;
573 }
574 urb->complete = ti_interrupt_callback;
575 urb->context = tdev;
576 urb->dev = dev;
577 status = usb_submit_urb(urb, GFP_KERNEL);
578 if (status) {
579 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
580 goto release_lock;
581 }
582 }
583
584 ti_set_termios(port, port->tty->termios);
585
586 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
587 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
588 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
589 if (status) {
590 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
591 goto unlink_int_urb;
592 }
593
594 dbg("%s - sending TI_START_PORT", __FUNCTION__);
595 status = ti_command_out_sync(tdev, TI_START_PORT,
596 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
597 if (status) {
598 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
599 goto unlink_int_urb;
600 }
601
602 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
603 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
604 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
605 if (status) {
606 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
607 goto unlink_int_urb;
608 }
609 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
610 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
611 if (status) {
612 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
613 goto unlink_int_urb;
614 }
615
616 /* reset the data toggle on the bulk endpoints to work around bug in
617 * host controllers where things get out of sync some times */
618 usb_clear_halt(dev, port->write_urb->pipe);
619 usb_clear_halt(dev, port->read_urb->pipe);
620
621 ti_set_termios(port, port->tty->termios);
622
623 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
624 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
625 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
626 if (status) {
627 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
628 goto unlink_int_urb;
629 }
630
631 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
632 status = ti_command_out_sync(tdev, TI_START_PORT,
633 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
634 if (status) {
635 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
636 goto unlink_int_urb;
637 }
638
639 /* start read urb */
640 dbg("%s - start read urb", __FUNCTION__);
641 urb = port->read_urb;
642 if (!urb) {
643 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
644 status = -EINVAL;
645 goto unlink_int_urb;
646 }
647 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
648 urb->complete = ti_bulk_in_callback;
649 urb->context = tport;
650 urb->dev = dev;
651 status = usb_submit_urb(urb, GFP_KERNEL);
652 if (status) {
653 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
654 goto unlink_int_urb;
655 }
656
657 tport->tp_is_open = 1;
658 ++tdev->td_open_port_count;
659
660 goto release_lock;
661
662 unlink_int_urb:
663 if (tdev->td_open_port_count == 0)
664 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
665 release_lock:
666 mutex_unlock(&tdev->td_open_close_lock);
667 dbg("%s - exit %d", __FUNCTION__, status);
668 return status;
669 }
670
671
672 static void ti_close(struct usb_serial_port *port, struct file *file)
673 {
674 struct ti_device *tdev;
675 struct ti_port *tport;
676 int port_number;
677 int status;
678 int do_unlock;
679
680 dbg("%s - port %d", __FUNCTION__, port->number);
681
682 tdev = usb_get_serial_data(port->serial);
683 tport = usb_get_serial_port_data(port);
684 if (tdev == NULL || tport == NULL)
685 return;
686
687 tport->tp_is_open = 0;
688
689 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
690
691 usb_kill_urb(port->read_urb);
692 usb_kill_urb(port->write_urb);
693 tport->tp_write_urb_in_use = 0;
694
695 port_number = port->number - port->serial->minor;
696
697 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
698 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
699 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
700 if (status)
701 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
702
703 /* if mutex_lock is interrupted, continue anyway */
704 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
705 --tport->tp_tdev->td_open_port_count;
706 if (tport->tp_tdev->td_open_port_count <= 0) {
707 /* last port is closed, shut down interrupt urb */
708 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
709 tport->tp_tdev->td_open_port_count = 0;
710 }
711 if (do_unlock)
712 mutex_unlock(&tdev->td_open_close_lock);
713
714 dbg("%s - exit", __FUNCTION__);
715 }
716
717
718 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
719 int count)
720 {
721 struct ti_port *tport = usb_get_serial_port_data(port);
722 unsigned long flags;
723
724 dbg("%s - port %d", __FUNCTION__, port->number);
725
726 if (count == 0) {
727 dbg("%s - write request of 0 bytes", __FUNCTION__);
728 return 0;
729 }
730
731 if (tport == NULL || !tport->tp_is_open)
732 return -ENODEV;
733
734 spin_lock_irqsave(&tport->tp_lock, flags);
735 count = ti_buf_put(tport->tp_write_buf, data, count);
736 spin_unlock_irqrestore(&tport->tp_lock, flags);
737
738 ti_send(tport);
739
740 return count;
741 }
742
743
744 static int ti_write_room(struct usb_serial_port *port)
745 {
746 struct ti_port *tport = usb_get_serial_port_data(port);
747 int room = 0;
748 unsigned long flags;
749
750 dbg("%s - port %d", __FUNCTION__, port->number);
751
752 if (tport == NULL)
753 return -ENODEV;
754
755 spin_lock_irqsave(&tport->tp_lock, flags);
756 room = ti_buf_space_avail(tport->tp_write_buf);
757 spin_unlock_irqrestore(&tport->tp_lock, flags);
758
759 dbg("%s - returns %d", __FUNCTION__, room);
760 return room;
761 }
762
763
764 static int ti_chars_in_buffer(struct usb_serial_port *port)
765 {
766 struct ti_port *tport = usb_get_serial_port_data(port);
767 int chars = 0;
768 unsigned long flags;
769
770 dbg("%s - port %d", __FUNCTION__, port->number);
771
772 if (tport == NULL)
773 return -ENODEV;
774
775 spin_lock_irqsave(&tport->tp_lock, flags);
776 chars = ti_buf_data_avail(tport->tp_write_buf);
777 spin_unlock_irqrestore(&tport->tp_lock, flags);
778
779 dbg("%s - returns %d", __FUNCTION__, chars);
780 return chars;
781 }
782
783
784 static void ti_throttle(struct usb_serial_port *port)
785 {
786 struct ti_port *tport = usb_get_serial_port_data(port);
787 struct tty_struct *tty;
788
789 dbg("%s - port %d", __FUNCTION__, port->number);
790
791 if (tport == NULL)
792 return;
793
794 tty = port->tty;
795 if (!tty) {
796 dbg("%s - no tty", __FUNCTION__);
797 return;
798 }
799
800 if (I_IXOFF(tty) || C_CRTSCTS(tty))
801 ti_stop_read(tport, tty);
802
803 }
804
805
806 static void ti_unthrottle(struct usb_serial_port *port)
807 {
808 struct ti_port *tport = usb_get_serial_port_data(port);
809 struct tty_struct *tty;
810 int status;
811
812 dbg("%s - port %d", __FUNCTION__, port->number);
813
814 if (tport == NULL)
815 return;
816
817 tty = port->tty;
818 if (!tty) {
819 dbg("%s - no tty", __FUNCTION__);
820 return;
821 }
822
823 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
824 status = ti_restart_read(tport, tty);
825 if (status)
826 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
827 }
828 }
829
830
831 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
832 unsigned int cmd, unsigned long arg)
833 {
834 struct ti_port *tport = usb_get_serial_port_data(port);
835 struct async_icount cnow;
836 struct async_icount cprev;
837
838 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
839
840 if (tport == NULL)
841 return -ENODEV;
842
843 switch (cmd) {
844 case TIOCGSERIAL:
845 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
846 return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
847 break;
848
849 case TIOCSSERIAL:
850 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
851 return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
852 break;
853
854 case TIOCMIWAIT:
855 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
856 cprev = tport->tp_icount;
857 while (1) {
858 interruptible_sleep_on(&tport->tp_msr_wait);
859 if (signal_pending(current))
860 return -ERESTARTSYS;
861 cnow = tport->tp_icount;
862 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
863 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
864 return -EIO; /* no change => error */
865 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
866 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
867 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
868 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
869 return 0;
870 }
871 cprev = cnow;
872 }
873 break;
874
875 case TIOCGICOUNT:
876 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
877 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
878 return -EFAULT;
879 return 0;
880 }
881
882 return -ENOIOCTLCMD;
883 }
884
885
886 static void ti_set_termios(struct usb_serial_port *port,
887 struct ktermios *old_termios)
888 {
889 struct ti_port *tport = usb_get_serial_port_data(port);
890 struct tty_struct *tty = port->tty;
891 struct ti_uart_config *config;
892 tcflag_t cflag,iflag;
893 int baud;
894 int status;
895 int port_number = port->number - port->serial->minor;
896 unsigned int mcr;
897
898 dbg("%s - port %d", __FUNCTION__, port->number);
899
900 cflag = tty->termios->c_cflag;
901 iflag = tty->termios->c_iflag;
902
903 dbg("%s - cflag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
904 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
905
906 if (tport == NULL)
907 return;
908
909 config = kmalloc(sizeof(*config), GFP_KERNEL);
910 if (!config) {
911 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
912 return;
913 }
914
915 config->wFlags = 0;
916
917 /* these flags must be set */
918 config->wFlags |= TI_UART_ENABLE_MS_INTS;
919 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
920 config->bUartMode = (__u8)(tport->tp_uart_mode);
921
922 switch (cflag & CSIZE) {
923 case CS5:
924 config->bDataBits = TI_UART_5_DATA_BITS;
925 break;
926 case CS6:
927 config->bDataBits = TI_UART_6_DATA_BITS;
928 break;
929 case CS7:
930 config->bDataBits = TI_UART_7_DATA_BITS;
931 break;
932 default:
933 case CS8:
934 config->bDataBits = TI_UART_8_DATA_BITS;
935 break;
936 }
937
938 /* CMSPAR isn't supported by this driver */
939 tty->termios->c_cflag &= ~CMSPAR;
940
941 if (cflag & PARENB) {
942 if (cflag & PARODD) {
943 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
944 config->bParity = TI_UART_ODD_PARITY;
945 } else {
946 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
947 config->bParity = TI_UART_EVEN_PARITY;
948 }
949 } else {
950 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
951 config->bParity = TI_UART_NO_PARITY;
952 }
953
954 if (cflag & CSTOPB)
955 config->bStopBits = TI_UART_2_STOP_BITS;
956 else
957 config->bStopBits = TI_UART_1_STOP_BITS;
958
959 if (cflag & CRTSCTS) {
960 /* RTS flow control must be off to drop RTS for baud rate B0 */
961 if ((cflag & CBAUD) != B0)
962 config->wFlags |= TI_UART_ENABLE_RTS_IN;
963 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
964 } else {
965 tty->hw_stopped = 0;
966 ti_restart_read(tport, tty);
967 }
968
969 if (I_IXOFF(tty) || I_IXON(tty)) {
970 config->cXon = START_CHAR(tty);
971 config->cXoff = STOP_CHAR(tty);
972
973 if (I_IXOFF(tty))
974 config->wFlags |= TI_UART_ENABLE_X_IN;
975 else
976 ti_restart_read(tport, tty);
977
978 if (I_IXON(tty))
979 config->wFlags |= TI_UART_ENABLE_X_OUT;
980 }
981
982 baud = tty_get_baud_rate(tty);
983 if (!baud)
984 baud = 9600;
985 if (tport->tp_tdev->td_is_3410)
986 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
987 else
988 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
989
990 /* FIXME: Should calculate resulting baud here and report it back */
991 if ((cflag & CBAUD) != B0)
992 tty_encode_baud_rate(tty, baud, baud);
993
994 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
995 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
996
997 cpu_to_be16s(&config->wBaudRate);
998 cpu_to_be16s(&config->wFlags);
999
1000 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1001 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1002 sizeof(*config));
1003 if (status)
1004 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1005
1006 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1007 mcr = tport->tp_shadow_mcr;
1008 /* if baud rate is B0, clear RTS and DTR */
1009 if ((cflag & CBAUD) == B0)
1010 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1011 status = ti_set_mcr(tport, mcr);
1012 if (status)
1013 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1014
1015 kfree(config);
1016 }
1017
1018
1019 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1020 {
1021 struct ti_port *tport = usb_get_serial_port_data(port);
1022 unsigned int result;
1023 unsigned int msr;
1024 unsigned int mcr;
1025
1026 dbg("%s - port %d", __FUNCTION__, port->number);
1027
1028 if (tport == NULL)
1029 return -ENODEV;
1030
1031 msr = tport->tp_msr;
1032 mcr = tport->tp_shadow_mcr;
1033
1034 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1035 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1036 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1037 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1038 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1039 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1040 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1041
1042 dbg("%s - 0x%04X", __FUNCTION__, result);
1043
1044 return result;
1045 }
1046
1047
1048 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1049 unsigned int set, unsigned int clear)
1050 {
1051 struct ti_port *tport = usb_get_serial_port_data(port);
1052 unsigned int mcr;
1053
1054 dbg("%s - port %d", __FUNCTION__, port->number);
1055
1056 if (tport == NULL)
1057 return -ENODEV;
1058
1059 mcr = tport->tp_shadow_mcr;
1060
1061 if (set & TIOCM_RTS)
1062 mcr |= TI_MCR_RTS;
1063 if (set & TIOCM_DTR)
1064 mcr |= TI_MCR_DTR;
1065 if (set & TIOCM_LOOP)
1066 mcr |= TI_MCR_LOOP;
1067
1068 if (clear & TIOCM_RTS)
1069 mcr &= ~TI_MCR_RTS;
1070 if (clear & TIOCM_DTR)
1071 mcr &= ~TI_MCR_DTR;
1072 if (clear & TIOCM_LOOP)
1073 mcr &= ~TI_MCR_LOOP;
1074
1075 return ti_set_mcr(tport, mcr);
1076 }
1077
1078
1079 static void ti_break(struct usb_serial_port *port, int break_state)
1080 {
1081 struct ti_port *tport = usb_get_serial_port_data(port);
1082 int status;
1083
1084 dbg("%s - state = %d", __FUNCTION__, break_state);
1085
1086 if (tport == NULL)
1087 return;
1088
1089 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1090
1091 status = ti_write_byte(tport->tp_tdev,
1092 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1093 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1094
1095 if (status)
1096 dbg("%s - error setting break, %d", __FUNCTION__, status);
1097 }
1098
1099
1100 static void ti_interrupt_callback(struct urb *urb)
1101 {
1102 struct ti_device *tdev = (struct ti_device *)urb->context;
1103 struct usb_serial_port *port;
1104 struct usb_serial *serial = tdev->td_serial;
1105 struct ti_port *tport;
1106 struct device *dev = &urb->dev->dev;
1107 unsigned char *data = urb->transfer_buffer;
1108 int length = urb->actual_length;
1109 int port_number;
1110 int function;
1111 int status = urb->status;
1112 int retval;
1113 __u8 msr;
1114
1115 dbg("%s", __FUNCTION__);
1116
1117 switch (status) {
1118 case 0:
1119 break;
1120 case -ECONNRESET:
1121 case -ENOENT:
1122 case -ESHUTDOWN:
1123 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1124 tdev->td_urb_error = 1;
1125 return;
1126 default:
1127 dev_err(dev, "%s - nonzero urb status, %d\n",
1128 __FUNCTION__, status);
1129 tdev->td_urb_error = 1;
1130 goto exit;
1131 }
1132
1133 if (length != 2) {
1134 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1135 goto exit;
1136 }
1137
1138 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1139 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1140 goto exit;
1141 }
1142
1143 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1144 function = TI_GET_FUNC_FROM_CODE(data[0]);
1145
1146 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1147
1148 if (port_number >= serial->num_ports) {
1149 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1150 goto exit;
1151 }
1152
1153 port = serial->port[port_number];
1154
1155 tport = usb_get_serial_port_data(port);
1156 if (!tport)
1157 goto exit;
1158
1159 switch (function) {
1160 case TI_CODE_DATA_ERROR:
1161 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1162 break;
1163
1164 case TI_CODE_MODEM_STATUS:
1165 msr = data[1];
1166 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1167 ti_handle_new_msr(tport, msr);
1168 break;
1169
1170 default:
1171 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1172 break;
1173 }
1174
1175 exit:
1176 retval = usb_submit_urb(urb, GFP_ATOMIC);
1177 if (retval)
1178 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1179 __FUNCTION__, retval);
1180 }
1181
1182
1183 static void ti_bulk_in_callback(struct urb *urb)
1184 {
1185 struct ti_port *tport = (struct ti_port *)urb->context;
1186 struct usb_serial_port *port = tport->tp_port;
1187 struct device *dev = &urb->dev->dev;
1188 int status = urb->status;
1189 int retval = 0;
1190
1191 dbg("%s", __FUNCTION__);
1192
1193 switch (status) {
1194 case 0:
1195 break;
1196 case -ECONNRESET:
1197 case -ENOENT:
1198 case -ESHUTDOWN:
1199 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1200 tport->tp_tdev->td_urb_error = 1;
1201 wake_up_interruptible(&tport->tp_write_wait);
1202 return;
1203 default:
1204 dev_err(dev, "%s - nonzero urb status, %d\n",
1205 __FUNCTION__, status );
1206 tport->tp_tdev->td_urb_error = 1;
1207 wake_up_interruptible(&tport->tp_write_wait);
1208 }
1209
1210 if (status == -EPIPE)
1211 goto exit;
1212
1213 if (status) {
1214 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1215 return;
1216 }
1217
1218 if (port->tty && urb->actual_length) {
1219 usb_serial_debug_data(debug, dev, __FUNCTION__,
1220 urb->actual_length, urb->transfer_buffer);
1221
1222 if (!tport->tp_is_open)
1223 dbg("%s - port closed, dropping data", __FUNCTION__);
1224 else
1225 ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1226 urb->actual_length);
1227
1228 spin_lock(&tport->tp_lock);
1229 tport->tp_icount.rx += urb->actual_length;
1230 spin_unlock(&tport->tp_lock);
1231 }
1232
1233 exit:
1234 /* continue to read unless stopping */
1235 spin_lock(&tport->tp_lock);
1236 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1237 urb->dev = port->serial->dev;
1238 retval = usb_submit_urb(urb, GFP_ATOMIC);
1239 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1240 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1241 }
1242 spin_unlock(&tport->tp_lock);
1243 if (retval)
1244 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1245 __FUNCTION__, retval);
1246 }
1247
1248
1249 static void ti_bulk_out_callback(struct urb *urb)
1250 {
1251 struct ti_port *tport = (struct ti_port *)urb->context;
1252 struct usb_serial_port *port = tport->tp_port;
1253 struct device *dev = &urb->dev->dev;
1254 int status = urb->status;
1255
1256 dbg("%s - port %d", __FUNCTION__, port->number);
1257
1258 tport->tp_write_urb_in_use = 0;
1259
1260 switch (status) {
1261 case 0:
1262 break;
1263 case -ECONNRESET:
1264 case -ENOENT:
1265 case -ESHUTDOWN:
1266 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1267 tport->tp_tdev->td_urb_error = 1;
1268 wake_up_interruptible(&tport->tp_write_wait);
1269 return;
1270 default:
1271 dev_err(dev, "%s - nonzero urb status, %d\n",
1272 __FUNCTION__, status);
1273 tport->tp_tdev->td_urb_error = 1;
1274 wake_up_interruptible(&tport->tp_write_wait);
1275 }
1276
1277 /* send any buffered data */
1278 ti_send(tport);
1279 }
1280
1281
1282 static void ti_recv(struct device *dev, struct tty_struct *tty,
1283 unsigned char *data, int length)
1284 {
1285 int cnt;
1286
1287 do {
1288 cnt = tty_buffer_request_room(tty, length);
1289 if (cnt < length) {
1290 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1291 if(cnt == 0)
1292 break;
1293 }
1294 tty_insert_flip_string(tty, data, cnt);
1295 tty_flip_buffer_push(tty);
1296 data += cnt;
1297 length -= cnt;
1298 } while (length > 0);
1299
1300 }
1301
1302
1303 static void ti_send(struct ti_port *tport)
1304 {
1305 int count, result;
1306 struct usb_serial_port *port = tport->tp_port;
1307 struct tty_struct *tty = port->tty;
1308 unsigned long flags;
1309
1310
1311 dbg("%s - port %d", __FUNCTION__, port->number);
1312
1313 spin_lock_irqsave(&tport->tp_lock, flags);
1314
1315 if (tport->tp_write_urb_in_use) {
1316 spin_unlock_irqrestore(&tport->tp_lock, flags);
1317 return;
1318 }
1319
1320 count = ti_buf_get(tport->tp_write_buf,
1321 port->write_urb->transfer_buffer,
1322 port->bulk_out_size);
1323
1324 if (count == 0) {
1325 spin_unlock_irqrestore(&tport->tp_lock, flags);
1326 return;
1327 }
1328
1329 tport->tp_write_urb_in_use = 1;
1330
1331 spin_unlock_irqrestore(&tport->tp_lock, flags);
1332
1333 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1334
1335 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1336 usb_sndbulkpipe(port->serial->dev,
1337 port->bulk_out_endpointAddress),
1338 port->write_urb->transfer_buffer, count,
1339 ti_bulk_out_callback, tport);
1340
1341 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1342 if (result) {
1343 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1344 tport->tp_write_urb_in_use = 0;
1345 /* TODO: reschedule ti_send */
1346 } else {
1347 spin_lock_irqsave(&tport->tp_lock, flags);
1348 tport->tp_icount.tx += count;
1349 spin_unlock_irqrestore(&tport->tp_lock, flags);
1350 }
1351
1352 /* more room in the buffer for new writes, wakeup */
1353 if (tty)
1354 tty_wakeup(tty);
1355 wake_up_interruptible(&tport->tp_write_wait);
1356 }
1357
1358
1359 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1360 {
1361 int status;
1362
1363 status = ti_write_byte(tport->tp_tdev,
1364 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1365 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1366
1367 if (!status)
1368 tport->tp_shadow_mcr = mcr;
1369
1370 return status;
1371 }
1372
1373
1374 static int ti_get_lsr(struct ti_port *tport)
1375 {
1376 int size,status;
1377 struct ti_device *tdev = tport->tp_tdev;
1378 struct usb_serial_port *port = tport->tp_port;
1379 int port_number = port->number - port->serial->minor;
1380 struct ti_port_status *data;
1381
1382 dbg("%s - port %d", __FUNCTION__, port->number);
1383
1384 size = sizeof(struct ti_port_status);
1385 data = kmalloc(size, GFP_KERNEL);
1386 if (!data) {
1387 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1388 return -ENOMEM;
1389 }
1390
1391 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1392 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1393 if (status) {
1394 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1395 goto free_data;
1396 }
1397
1398 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1399
1400 tport->tp_lsr = data->bLSR;
1401
1402 free_data:
1403 kfree(data);
1404 return status;
1405 }
1406
1407
1408 static int ti_get_serial_info(struct ti_port *tport,
1409 struct serial_struct __user *ret_arg)
1410 {
1411 struct usb_serial_port *port = tport->tp_port;
1412 struct serial_struct ret_serial;
1413
1414 if (!ret_arg)
1415 return -EFAULT;
1416
1417 memset(&ret_serial, 0, sizeof(ret_serial));
1418
1419 ret_serial.type = PORT_16550A;
1420 ret_serial.line = port->serial->minor;
1421 ret_serial.port = port->number - port->serial->minor;
1422 ret_serial.flags = tport->tp_flags;
1423 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1424 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1425 ret_serial.closing_wait = tport->tp_closing_wait;
1426
1427 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1428 return -EFAULT;
1429
1430 return 0;
1431 }
1432
1433
1434 static int ti_set_serial_info(struct ti_port *tport,
1435 struct serial_struct __user *new_arg)
1436 {
1437 struct usb_serial_port *port = tport->tp_port;
1438 struct serial_struct new_serial;
1439
1440 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1441 return -EFAULT;
1442
1443 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1444 if (port->tty)
1445 port->tty->low_latency =
1446 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1447 tport->tp_closing_wait = new_serial.closing_wait;
1448
1449 return 0;
1450 }
1451
1452
1453 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1454 {
1455 struct async_icount *icount;
1456 struct tty_struct *tty;
1457 unsigned long flags;
1458
1459 dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1460
1461 if (msr & TI_MSR_DELTA_MASK) {
1462 spin_lock_irqsave(&tport->tp_lock, flags);
1463 icount = &tport->tp_icount;
1464 if (msr & TI_MSR_DELTA_CTS)
1465 icount->cts++;
1466 if (msr & TI_MSR_DELTA_DSR)
1467 icount->dsr++;
1468 if (msr & TI_MSR_DELTA_CD)
1469 icount->dcd++;
1470 if (msr & TI_MSR_DELTA_RI)
1471 icount->rng++;
1472 wake_up_interruptible(&tport->tp_msr_wait);
1473 spin_unlock_irqrestore(&tport->tp_lock, flags);
1474 }
1475
1476 tport->tp_msr = msr & TI_MSR_MASK;
1477
1478 /* handle CTS flow control */
1479 tty = tport->tp_port->tty;
1480 if (tty && C_CRTSCTS(tty)) {
1481 if (msr & TI_MSR_CTS) {
1482 tty->hw_stopped = 0;
1483 tty_wakeup(tty);
1484 } else {
1485 tty->hw_stopped = 1;
1486 }
1487 }
1488 }
1489
1490
1491 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1492 {
1493 struct ti_device *tdev = tport->tp_tdev;
1494 struct usb_serial_port *port = tport->tp_port;
1495 wait_queue_t wait;
1496
1497 dbg("%s - port %d", __FUNCTION__, port->number);
1498
1499 spin_lock_irq(&tport->tp_lock);
1500
1501 /* wait for data to drain from the buffer */
1502 tdev->td_urb_error = 0;
1503 init_waitqueue_entry(&wait, current);
1504 add_wait_queue(&tport->tp_write_wait, &wait);
1505 for (;;) {
1506 set_current_state(TASK_INTERRUPTIBLE);
1507 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1508 || timeout == 0 || signal_pending(current)
1509 || tdev->td_urb_error
1510 || port->serial->disconnected) /* disconnect */
1511 break;
1512 spin_unlock_irq(&tport->tp_lock);
1513 timeout = schedule_timeout(timeout);
1514 spin_lock_irq(&tport->tp_lock);
1515 }
1516 set_current_state(TASK_RUNNING);
1517 remove_wait_queue(&tport->tp_write_wait, &wait);
1518
1519 /* flush any remaining data in the buffer */
1520 if (flush)
1521 ti_buf_clear(tport->tp_write_buf);
1522
1523 spin_unlock_irq(&tport->tp_lock);
1524
1525 mutex_lock(&port->serial->disc_mutex);
1526 /* wait for data to drain from the device */
1527 /* wait for empty tx register, plus 20 ms */
1528 timeout += jiffies;
1529 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1530 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1531 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1532 && !port->serial->disconnected) {
1533 if (ti_get_lsr(tport))
1534 break;
1535 mutex_unlock(&port->serial->disc_mutex);
1536 msleep_interruptible(20);
1537 mutex_lock(&port->serial->disc_mutex);
1538 }
1539 mutex_unlock(&port->serial->disc_mutex);
1540 }
1541
1542
1543 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1544 {
1545 unsigned long flags;
1546
1547 spin_lock_irqsave(&tport->tp_lock, flags);
1548
1549 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1550 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1551
1552 spin_unlock_irqrestore(&tport->tp_lock, flags);
1553 }
1554
1555
1556 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1557 {
1558 struct urb *urb;
1559 int status = 0;
1560 unsigned long flags;
1561
1562 spin_lock_irqsave(&tport->tp_lock, flags);
1563
1564 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1565 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1566 urb = tport->tp_port->read_urb;
1567 spin_unlock_irqrestore(&tport->tp_lock, flags);
1568 urb->complete = ti_bulk_in_callback;
1569 urb->context = tport;
1570 urb->dev = tport->tp_port->serial->dev;
1571 status = usb_submit_urb(urb, GFP_KERNEL);
1572 } else {
1573 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1574 spin_unlock_irqrestore(&tport->tp_lock, flags);
1575 }
1576
1577 return status;
1578 }
1579
1580
1581 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1582 __u16 moduleid, __u16 value, __u8 *data, int size)
1583 {
1584 int status;
1585
1586 status = usb_control_msg(tdev->td_serial->dev,
1587 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1588 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1589 value, moduleid, data, size, 1000);
1590
1591 if (status == size)
1592 status = 0;
1593
1594 if (status > 0)
1595 status = -ECOMM;
1596
1597 return status;
1598 }
1599
1600
1601 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1602 __u16 moduleid, __u16 value, __u8 *data, int size)
1603 {
1604 int status;
1605
1606 status = usb_control_msg(tdev->td_serial->dev,
1607 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1608 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1609 value, moduleid, data, size, 1000);
1610
1611 if (status == size)
1612 status = 0;
1613
1614 if (status > 0)
1615 status = -ECOMM;
1616
1617 return status;
1618 }
1619
1620
1621 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1622 __u8 mask, __u8 byte)
1623 {
1624 int status;
1625 unsigned int size;
1626 struct ti_write_data_bytes *data;
1627 struct device *dev = &tdev->td_serial->dev->dev;
1628
1629 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1630
1631 size = sizeof(struct ti_write_data_bytes) + 2;
1632 data = kmalloc(size, GFP_KERNEL);
1633 if (!data) {
1634 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1635 return -ENOMEM;
1636 }
1637
1638 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1639 data->bDataType = TI_RW_DATA_BYTE;
1640 data->bDataCounter = 1;
1641 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1642 data->wBaseAddrLo = cpu_to_be16(addr);
1643 data->bData[0] = mask;
1644 data->bData[1] = byte;
1645
1646 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1647 (__u8 *)data, size);
1648
1649 if (status < 0)
1650 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1651
1652 kfree(data);
1653
1654 return status;
1655 }
1656
1657
1658 static int ti_download_firmware(struct ti_device *tdev,
1659 unsigned char *firmware, unsigned int firmware_size)
1660 {
1661 int status = 0;
1662 int buffer_size;
1663 int pos;
1664 int len;
1665 int done;
1666 __u8 cs = 0;
1667 __u8 *buffer;
1668 struct usb_device *dev = tdev->td_serial->dev;
1669 struct ti_firmware_header *header;
1670 unsigned int pipe = usb_sndbulkpipe(dev,
1671 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1672
1673
1674 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1675 buffer = kmalloc(buffer_size, GFP_KERNEL);
1676 if (!buffer) {
1677 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1678 return -ENOMEM;
1679 }
1680
1681 memcpy(buffer, firmware, firmware_size);
1682 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1683
1684 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1685 cs = (__u8)(cs + buffer[pos]);
1686
1687 header = (struct ti_firmware_header *)buffer;
1688 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1689 header->bCheckSum = cs;
1690
1691 dbg("%s - downloading firmware", __FUNCTION__);
1692 for (pos = 0; pos < buffer_size; pos += done) {
1693 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1694 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1695 if (status)
1696 break;
1697 }
1698
1699 kfree(buffer);
1700
1701 if (status) {
1702 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1703 return status;
1704 }
1705
1706 dbg("%s - download successful", __FUNCTION__);
1707
1708 return 0;
1709 }
1710
1711
1712 /* Circular Buffer Functions */
1713
1714 /*
1715 * ti_buf_alloc
1716 *
1717 * Allocate a circular buffer and all associated memory.
1718 */
1719
1720 static struct circ_buf *ti_buf_alloc(void)
1721 {
1722 struct circ_buf *cb;
1723
1724 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1725 if (cb == NULL)
1726 return NULL;
1727
1728 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1729 if (cb->buf == NULL) {
1730 kfree(cb);
1731 return NULL;
1732 }
1733
1734 ti_buf_clear(cb);
1735
1736 return cb;
1737 }
1738
1739
1740 /*
1741 * ti_buf_free
1742 *
1743 * Free the buffer and all associated memory.
1744 */
1745
1746 static void ti_buf_free(struct circ_buf *cb)
1747 {
1748 kfree(cb->buf);
1749 kfree(cb);
1750 }
1751
1752
1753 /*
1754 * ti_buf_clear
1755 *
1756 * Clear out all data in the circular buffer.
1757 */
1758
1759 static void ti_buf_clear(struct circ_buf *cb)
1760 {
1761 cb->head = cb->tail = 0;
1762 }
1763
1764
1765 /*
1766 * ti_buf_data_avail
1767 *
1768 * Return the number of bytes of data available in the circular
1769 * buffer.
1770 */
1771
1772 static int ti_buf_data_avail(struct circ_buf *cb)
1773 {
1774 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1775 }
1776
1777
1778 /*
1779 * ti_buf_space_avail
1780 *
1781 * Return the number of bytes of space available in the circular
1782 * buffer.
1783 */
1784
1785 static int ti_buf_space_avail(struct circ_buf *cb)
1786 {
1787 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1788 }
1789
1790
1791 /*
1792 * ti_buf_put
1793 *
1794 * Copy data data from a user buffer and put it into the circular buffer.
1795 * Restrict to the amount of space available.
1796 *
1797 * Return the number of bytes copied.
1798 */
1799
1800 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1801 {
1802 int c, ret = 0;
1803
1804 while (1) {
1805 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1806 if (count < c)
1807 c = count;
1808 if (c <= 0)
1809 break;
1810 memcpy(cb->buf + cb->head, buf, c);
1811 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1812 buf += c;
1813 count -= c;
1814 ret += c;
1815 }
1816
1817 return ret;
1818 }
1819
1820
1821 /*
1822 * ti_buf_get
1823 *
1824 * Get data from the circular buffer and copy to the given buffer.
1825 * Restrict to the amount of data available.
1826 *
1827 * Return the number of bytes copied.
1828 */
1829
1830 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1831 {
1832 int c, ret = 0;
1833
1834 while (1) {
1835 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1836 if (count < c)
1837 c = count;
1838 if (c <= 0)
1839 break;
1840 memcpy(buf, cb->buf + cb->tail, c);
1841 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1842 buf += c;
1843 count -= c;
1844 ret += c;
1845 }
1846
1847 return ret;
1848 }
WRT350N Kernel Patches