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Merge remote-tracking branch 'asoc/topic/tegra' into asoc-next
[deliverable/linux.git] / drivers / usb / serial / ti_usb_3410_5052.c
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
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/firmware.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/kfifo.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "ti_usb_3410_5052.h"
40
41 /* Defines */
42
43 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
44 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
45
46 #define TI_FIRMWARE_BUF_SIZE 16284
47
48 #define TI_TRANSFER_TIMEOUT 2
49
50 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
51
52 /* supported setserial flags */
53 #define TI_SET_SERIAL_FLAGS 0
54
55 /* read urb states */
56 #define TI_READ_URB_RUNNING 0
57 #define TI_READ_URB_STOPPING 1
58 #define TI_READ_URB_STOPPED 2
59
60 #define TI_EXTRA_VID_PID_COUNT 5
61
62
63 /* Structures */
64
65 struct ti_port {
66 int tp_is_open;
67 __u8 tp_msr;
68 __u8 tp_shadow_mcr;
69 __u8 tp_uart_mode; /* 232 or 485 modes */
70 unsigned int tp_uart_base_addr;
71 int tp_flags;
72 struct ti_device *tp_tdev;
73 struct usb_serial_port *tp_port;
74 spinlock_t tp_lock;
75 int tp_read_urb_state;
76 int tp_write_urb_in_use;
77 };
78
79 struct ti_device {
80 struct mutex td_open_close_lock;
81 int td_open_port_count;
82 struct usb_serial *td_serial;
83 int td_is_3410;
84 int td_urb_error;
85 };
86
87
88 /* Function Declarations */
89
90 static int ti_startup(struct usb_serial *serial);
91 static void ti_release(struct usb_serial *serial);
92 static int ti_port_probe(struct usb_serial_port *port);
93 static int ti_port_remove(struct usb_serial_port *port);
94 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
95 static void ti_close(struct usb_serial_port *port);
96 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
97 const unsigned char *data, int count);
98 static int ti_write_room(struct tty_struct *tty);
99 static int ti_chars_in_buffer(struct tty_struct *tty);
100 static bool ti_tx_empty(struct usb_serial_port *port);
101 static void ti_throttle(struct tty_struct *tty);
102 static void ti_unthrottle(struct tty_struct *tty);
103 static int ti_ioctl(struct tty_struct *tty,
104 unsigned int cmd, unsigned long arg);
105 static void ti_set_termios(struct tty_struct *tty,
106 struct usb_serial_port *port, struct ktermios *old_termios);
107 static int ti_tiocmget(struct tty_struct *tty);
108 static int ti_tiocmset(struct tty_struct *tty,
109 unsigned int set, unsigned int clear);
110 static void ti_break(struct tty_struct *tty, int break_state);
111 static void ti_interrupt_callback(struct urb *urb);
112 static void ti_bulk_in_callback(struct urb *urb);
113 static void ti_bulk_out_callback(struct urb *urb);
114
115 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
116 int length);
117 static void ti_send(struct ti_port *tport);
118 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
119 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
120 static int ti_get_serial_info(struct ti_port *tport,
121 struct serial_struct __user *ret_arg);
122 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
123 struct serial_struct __user *new_arg);
124 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
125
126 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
127 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
128
129 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
130 __u16 moduleid, __u16 value, __u8 *data, int size);
131 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
132 __u16 moduleid, __u16 value, __u8 *data, int size);
133
134 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
135 unsigned long addr, __u8 mask, __u8 byte);
136
137 static int ti_download_firmware(struct ti_device *tdev);
138
139
140 /* Data */
141
142 /* module parameters */
143 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
144
145 /* supported devices */
146 static struct usb_device_id ti_id_table_3410[] = {
147 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
148 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
149 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
150 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
151 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
152 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
153 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
154 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
155 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
156 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
157 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
158 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
159 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
160 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
161 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
162 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
163 { } /* terminator */
164 };
165
166 static struct usb_device_id ti_id_table_5052[] = {
167 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
168 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
169 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
170 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
171 { } /* terminator */
172 };
173
174 static struct usb_device_id ti_id_table_combined[] = {
175 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
176 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
177 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
178 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
179 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
180 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
181 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
182 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
183 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
184 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
185 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
186 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
187 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
188 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
189 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
190 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
191 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
192 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
193 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
194 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
195 { } /* terminator */
196 };
197
198 static struct usb_serial_driver ti_1port_device = {
199 .driver = {
200 .owner = THIS_MODULE,
201 .name = "ti_usb_3410_5052_1",
202 },
203 .description = "TI USB 3410 1 port adapter",
204 .id_table = ti_id_table_3410,
205 .num_ports = 1,
206 .attach = ti_startup,
207 .release = ti_release,
208 .port_probe = ti_port_probe,
209 .port_remove = ti_port_remove,
210 .open = ti_open,
211 .close = ti_close,
212 .write = ti_write,
213 .write_room = ti_write_room,
214 .chars_in_buffer = ti_chars_in_buffer,
215 .tx_empty = ti_tx_empty,
216 .throttle = ti_throttle,
217 .unthrottle = ti_unthrottle,
218 .ioctl = ti_ioctl,
219 .set_termios = ti_set_termios,
220 .tiocmget = ti_tiocmget,
221 .tiocmset = ti_tiocmset,
222 .tiocmiwait = usb_serial_generic_tiocmiwait,
223 .get_icount = usb_serial_generic_get_icount,
224 .break_ctl = ti_break,
225 .read_int_callback = ti_interrupt_callback,
226 .read_bulk_callback = ti_bulk_in_callback,
227 .write_bulk_callback = ti_bulk_out_callback,
228 };
229
230 static struct usb_serial_driver ti_2port_device = {
231 .driver = {
232 .owner = THIS_MODULE,
233 .name = "ti_usb_3410_5052_2",
234 },
235 .description = "TI USB 5052 2 port adapter",
236 .id_table = ti_id_table_5052,
237 .num_ports = 2,
238 .attach = ti_startup,
239 .release = ti_release,
240 .port_probe = ti_port_probe,
241 .port_remove = ti_port_remove,
242 .open = ti_open,
243 .close = ti_close,
244 .write = ti_write,
245 .write_room = ti_write_room,
246 .chars_in_buffer = ti_chars_in_buffer,
247 .tx_empty = ti_tx_empty,
248 .throttle = ti_throttle,
249 .unthrottle = ti_unthrottle,
250 .ioctl = ti_ioctl,
251 .set_termios = ti_set_termios,
252 .tiocmget = ti_tiocmget,
253 .tiocmset = ti_tiocmset,
254 .tiocmiwait = usb_serial_generic_tiocmiwait,
255 .get_icount = usb_serial_generic_get_icount,
256 .break_ctl = ti_break,
257 .read_int_callback = ti_interrupt_callback,
258 .read_bulk_callback = ti_bulk_in_callback,
259 .write_bulk_callback = ti_bulk_out_callback,
260 };
261
262 static struct usb_serial_driver * const serial_drivers[] = {
263 &ti_1port_device, &ti_2port_device, NULL
264 };
265
266 /* Module */
267
268 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
269 MODULE_DESCRIPTION(TI_DRIVER_DESC);
270 MODULE_LICENSE("GPL");
271
272 MODULE_FIRMWARE("ti_3410.fw");
273 MODULE_FIRMWARE("ti_5052.fw");
274 MODULE_FIRMWARE("mts_cdma.fw");
275 MODULE_FIRMWARE("mts_gsm.fw");
276 MODULE_FIRMWARE("mts_edge.fw");
277 MODULE_FIRMWARE("mts_mt9234mu.fw");
278 MODULE_FIRMWARE("mts_mt9234zba.fw");
279
280 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
281 MODULE_PARM_DESC(closing_wait,
282 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
283
284 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
285
286 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
287
288 /* Functions */
289
290 static int ti_startup(struct usb_serial *serial)
291 {
292 struct ti_device *tdev;
293 struct usb_device *dev = serial->dev;
294 int status;
295
296 dev_dbg(&dev->dev,
297 "%s - product 0x%4X, num configurations %d, configuration value %d",
298 __func__, le16_to_cpu(dev->descriptor.idProduct),
299 dev->descriptor.bNumConfigurations,
300 dev->actconfig->desc.bConfigurationValue);
301
302 /* create device structure */
303 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
304 if (tdev == NULL) {
305 dev_err(&dev->dev, "%s - out of memory\n", __func__);
306 return -ENOMEM;
307 }
308 mutex_init(&tdev->td_open_close_lock);
309 tdev->td_serial = serial;
310 usb_set_serial_data(serial, tdev);
311
312 /* determine device type */
313 if (serial->type == &ti_1port_device)
314 tdev->td_is_3410 = 1;
315 dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
316 tdev->td_is_3410 ? "3410" : "5052");
317
318 /* if we have only 1 configuration, download firmware */
319 if (dev->descriptor.bNumConfigurations == 1) {
320 status = ti_download_firmware(tdev);
321
322 if (status != 0)
323 goto free_tdev;
324
325 /* 3410 must be reset, 5052 resets itself */
326 if (tdev->td_is_3410) {
327 msleep_interruptible(100);
328 usb_reset_device(dev);
329 }
330
331 status = -ENODEV;
332 goto free_tdev;
333 }
334
335 /* the second configuration must be set */
336 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
337 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
338 status = status ? status : -ENODEV;
339 goto free_tdev;
340 }
341
342 return 0;
343
344 free_tdev:
345 kfree(tdev);
346 usb_set_serial_data(serial, NULL);
347 return status;
348 }
349
350
351 static void ti_release(struct usb_serial *serial)
352 {
353 struct ti_device *tdev = usb_get_serial_data(serial);
354
355 kfree(tdev);
356 }
357
358 static int ti_port_probe(struct usb_serial_port *port)
359 {
360 struct ti_port *tport;
361
362 tport = kzalloc(sizeof(*tport), GFP_KERNEL);
363 if (!tport)
364 return -ENOMEM;
365
366 spin_lock_init(&tport->tp_lock);
367 if (port == port->serial->port[0])
368 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
369 else
370 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
371 port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
372 tport->tp_port = port;
373 tport->tp_tdev = usb_get_serial_data(port->serial);
374 tport->tp_uart_mode = 0; /* default is RS232 */
375
376 usb_set_serial_port_data(port, tport);
377
378 port->port.drain_delay = 3;
379
380 return 0;
381 }
382
383 static int ti_port_remove(struct usb_serial_port *port)
384 {
385 struct ti_port *tport;
386
387 tport = usb_get_serial_port_data(port);
388 kfree(tport);
389
390 return 0;
391 }
392
393 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
394 {
395 struct ti_port *tport = usb_get_serial_port_data(port);
396 struct ti_device *tdev;
397 struct usb_device *dev;
398 struct urb *urb;
399 int port_number;
400 int status;
401 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
402 TI_PIPE_TIMEOUT_ENABLE |
403 (TI_TRANSFER_TIMEOUT << 2));
404
405 if (tport == NULL)
406 return -ENODEV;
407
408 dev = port->serial->dev;
409 tdev = tport->tp_tdev;
410
411 /* only one open on any port on a device at a time */
412 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
413 return -ERESTARTSYS;
414
415 port_number = port->port_number;
416
417 tport->tp_msr = 0;
418 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
419
420 /* start interrupt urb the first time a port is opened on this device */
421 if (tdev->td_open_port_count == 0) {
422 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
423 urb = tdev->td_serial->port[0]->interrupt_in_urb;
424 if (!urb) {
425 dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
426 status = -EINVAL;
427 goto release_lock;
428 }
429 urb->context = tdev;
430 status = usb_submit_urb(urb, GFP_KERNEL);
431 if (status) {
432 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
433 goto release_lock;
434 }
435 }
436
437 if (tty)
438 ti_set_termios(tty, port, &tty->termios);
439
440 dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
441 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
442 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
443 if (status) {
444 dev_err(&port->dev, "%s - cannot send open command, %d\n",
445 __func__, status);
446 goto unlink_int_urb;
447 }
448
449 dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
450 status = ti_command_out_sync(tdev, TI_START_PORT,
451 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
452 if (status) {
453 dev_err(&port->dev, "%s - cannot send start command, %d\n",
454 __func__, status);
455 goto unlink_int_urb;
456 }
457
458 dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
459 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
460 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
461 if (status) {
462 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
463 __func__, status);
464 goto unlink_int_urb;
465 }
466 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
467 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
468 if (status) {
469 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
470 __func__, status);
471 goto unlink_int_urb;
472 }
473
474 /* reset the data toggle on the bulk endpoints to work around bug in
475 * host controllers where things get out of sync some times */
476 usb_clear_halt(dev, port->write_urb->pipe);
477 usb_clear_halt(dev, port->read_urb->pipe);
478
479 if (tty)
480 ti_set_termios(tty, port, &tty->termios);
481
482 dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
483 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
484 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
485 if (status) {
486 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
487 __func__, status);
488 goto unlink_int_urb;
489 }
490
491 dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
492 status = ti_command_out_sync(tdev, TI_START_PORT,
493 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
494 if (status) {
495 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
496 __func__, status);
497 goto unlink_int_urb;
498 }
499
500 /* start read urb */
501 dev_dbg(&port->dev, "%s - start read urb\n", __func__);
502 urb = port->read_urb;
503 if (!urb) {
504 dev_err(&port->dev, "%s - no read urb\n", __func__);
505 status = -EINVAL;
506 goto unlink_int_urb;
507 }
508 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
509 urb->context = tport;
510 status = usb_submit_urb(urb, GFP_KERNEL);
511 if (status) {
512 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
513 __func__, status);
514 goto unlink_int_urb;
515 }
516
517 tport->tp_is_open = 1;
518 ++tdev->td_open_port_count;
519
520 goto release_lock;
521
522 unlink_int_urb:
523 if (tdev->td_open_port_count == 0)
524 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
525 release_lock:
526 mutex_unlock(&tdev->td_open_close_lock);
527 dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
528 return status;
529 }
530
531
532 static void ti_close(struct usb_serial_port *port)
533 {
534 struct ti_device *tdev;
535 struct ti_port *tport;
536 int port_number;
537 int status;
538 int do_unlock;
539 unsigned long flags;
540
541 tdev = usb_get_serial_data(port->serial);
542 tport = usb_get_serial_port_data(port);
543 if (tdev == NULL || tport == NULL)
544 return;
545
546 tport->tp_is_open = 0;
547
548 usb_kill_urb(port->read_urb);
549 usb_kill_urb(port->write_urb);
550 tport->tp_write_urb_in_use = 0;
551 spin_lock_irqsave(&tport->tp_lock, flags);
552 kfifo_reset_out(&port->write_fifo);
553 spin_unlock_irqrestore(&tport->tp_lock, flags);
554
555 port_number = port->port_number;
556
557 dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
558 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
559 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
560 if (status)
561 dev_err(&port->dev,
562 "%s - cannot send close port command, %d\n"
563 , __func__, status);
564
565 /* if mutex_lock is interrupted, continue anyway */
566 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
567 --tport->tp_tdev->td_open_port_count;
568 if (tport->tp_tdev->td_open_port_count <= 0) {
569 /* last port is closed, shut down interrupt urb */
570 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
571 tport->tp_tdev->td_open_port_count = 0;
572 }
573 if (do_unlock)
574 mutex_unlock(&tdev->td_open_close_lock);
575 }
576
577
578 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
579 const unsigned char *data, int count)
580 {
581 struct ti_port *tport = usb_get_serial_port_data(port);
582
583 if (count == 0) {
584 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
585 return 0;
586 }
587
588 if (tport == NULL || !tport->tp_is_open)
589 return -ENODEV;
590
591 count = kfifo_in_locked(&port->write_fifo, data, count,
592 &tport->tp_lock);
593 ti_send(tport);
594
595 return count;
596 }
597
598
599 static int ti_write_room(struct tty_struct *tty)
600 {
601 struct usb_serial_port *port = tty->driver_data;
602 struct ti_port *tport = usb_get_serial_port_data(port);
603 int room = 0;
604 unsigned long flags;
605
606 if (tport == NULL)
607 return 0;
608
609 spin_lock_irqsave(&tport->tp_lock, flags);
610 room = kfifo_avail(&port->write_fifo);
611 spin_unlock_irqrestore(&tport->tp_lock, flags);
612
613 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
614 return room;
615 }
616
617
618 static int ti_chars_in_buffer(struct tty_struct *tty)
619 {
620 struct usb_serial_port *port = tty->driver_data;
621 struct ti_port *tport = usb_get_serial_port_data(port);
622 int chars = 0;
623 unsigned long flags;
624
625 if (tport == NULL)
626 return 0;
627
628 spin_lock_irqsave(&tport->tp_lock, flags);
629 chars = kfifo_len(&port->write_fifo);
630 spin_unlock_irqrestore(&tport->tp_lock, flags);
631
632 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
633 return chars;
634 }
635
636 static bool ti_tx_empty(struct usb_serial_port *port)
637 {
638 struct ti_port *tport = usb_get_serial_port_data(port);
639 int ret;
640 u8 lsr;
641
642 ret = ti_get_lsr(tport, &lsr);
643 if (!ret && !(lsr & TI_LSR_TX_EMPTY))
644 return false;
645
646 return true;
647 }
648
649 static void ti_throttle(struct tty_struct *tty)
650 {
651 struct usb_serial_port *port = tty->driver_data;
652 struct ti_port *tport = usb_get_serial_port_data(port);
653
654 if (tport == NULL)
655 return;
656
657 if (I_IXOFF(tty) || C_CRTSCTS(tty))
658 ti_stop_read(tport, tty);
659
660 }
661
662
663 static void ti_unthrottle(struct tty_struct *tty)
664 {
665 struct usb_serial_port *port = tty->driver_data;
666 struct ti_port *tport = usb_get_serial_port_data(port);
667 int status;
668
669 if (tport == NULL)
670 return;
671
672 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
673 status = ti_restart_read(tport, tty);
674 if (status)
675 dev_err(&port->dev, "%s - cannot restart read, %d\n",
676 __func__, status);
677 }
678 }
679
680 static int ti_ioctl(struct tty_struct *tty,
681 unsigned int cmd, unsigned long arg)
682 {
683 struct usb_serial_port *port = tty->driver_data;
684 struct ti_port *tport = usb_get_serial_port_data(port);
685
686 dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
687
688 if (tport == NULL)
689 return -ENODEV;
690
691 switch (cmd) {
692 case TIOCGSERIAL:
693 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
694 return ti_get_serial_info(tport,
695 (struct serial_struct __user *)arg);
696 case TIOCSSERIAL:
697 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
698 return ti_set_serial_info(tty, tport,
699 (struct serial_struct __user *)arg);
700 }
701 return -ENOIOCTLCMD;
702 }
703
704
705 static void ti_set_termios(struct tty_struct *tty,
706 struct usb_serial_port *port, struct ktermios *old_termios)
707 {
708 struct ti_port *tport = usb_get_serial_port_data(port);
709 struct ti_uart_config *config;
710 tcflag_t cflag, iflag;
711 int baud;
712 int status;
713 int port_number = port->port_number;
714 unsigned int mcr;
715
716 cflag = tty->termios.c_cflag;
717 iflag = tty->termios.c_iflag;
718
719 dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
720 dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
721 old_termios->c_cflag, old_termios->c_iflag);
722
723 if (tport == NULL)
724 return;
725
726 config = kmalloc(sizeof(*config), GFP_KERNEL);
727 if (!config) {
728 dev_err(&port->dev, "%s - out of memory\n", __func__);
729 return;
730 }
731
732 config->wFlags = 0;
733
734 /* these flags must be set */
735 config->wFlags |= TI_UART_ENABLE_MS_INTS;
736 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
737 config->bUartMode = (__u8)(tport->tp_uart_mode);
738
739 switch (cflag & CSIZE) {
740 case CS5:
741 config->bDataBits = TI_UART_5_DATA_BITS;
742 break;
743 case CS6:
744 config->bDataBits = TI_UART_6_DATA_BITS;
745 break;
746 case CS7:
747 config->bDataBits = TI_UART_7_DATA_BITS;
748 break;
749 default:
750 case CS8:
751 config->bDataBits = TI_UART_8_DATA_BITS;
752 break;
753 }
754
755 /* CMSPAR isn't supported by this driver */
756 tty->termios.c_cflag &= ~CMSPAR;
757
758 if (cflag & PARENB) {
759 if (cflag & PARODD) {
760 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
761 config->bParity = TI_UART_ODD_PARITY;
762 } else {
763 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
764 config->bParity = TI_UART_EVEN_PARITY;
765 }
766 } else {
767 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
768 config->bParity = TI_UART_NO_PARITY;
769 }
770
771 if (cflag & CSTOPB)
772 config->bStopBits = TI_UART_2_STOP_BITS;
773 else
774 config->bStopBits = TI_UART_1_STOP_BITS;
775
776 if (cflag & CRTSCTS) {
777 /* RTS flow control must be off to drop RTS for baud rate B0 */
778 if ((cflag & CBAUD) != B0)
779 config->wFlags |= TI_UART_ENABLE_RTS_IN;
780 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
781 } else {
782 tty->hw_stopped = 0;
783 ti_restart_read(tport, tty);
784 }
785
786 if (I_IXOFF(tty) || I_IXON(tty)) {
787 config->cXon = START_CHAR(tty);
788 config->cXoff = STOP_CHAR(tty);
789
790 if (I_IXOFF(tty))
791 config->wFlags |= TI_UART_ENABLE_X_IN;
792 else
793 ti_restart_read(tport, tty);
794
795 if (I_IXON(tty))
796 config->wFlags |= TI_UART_ENABLE_X_OUT;
797 }
798
799 baud = tty_get_baud_rate(tty);
800 if (!baud)
801 baud = 9600;
802 if (tport->tp_tdev->td_is_3410)
803 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
804 else
805 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
806
807 /* FIXME: Should calculate resulting baud here and report it back */
808 if ((cflag & CBAUD) != B0)
809 tty_encode_baud_rate(tty, baud, baud);
810
811 dev_dbg(&port->dev,
812 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
813 __func__, baud, config->wBaudRate, config->wFlags,
814 config->bDataBits, config->bParity, config->bStopBits,
815 config->cXon, config->cXoff, config->bUartMode);
816
817 cpu_to_be16s(&config->wBaudRate);
818 cpu_to_be16s(&config->wFlags);
819
820 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
821 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
822 sizeof(*config));
823 if (status)
824 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
825 __func__, port_number, status);
826
827 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
828 mcr = tport->tp_shadow_mcr;
829 /* if baud rate is B0, clear RTS and DTR */
830 if ((cflag & CBAUD) == B0)
831 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
832 status = ti_set_mcr(tport, mcr);
833 if (status)
834 dev_err(&port->dev,
835 "%s - cannot set modem control on port %d, %d\n",
836 __func__, port_number, status);
837
838 kfree(config);
839 }
840
841
842 static int ti_tiocmget(struct tty_struct *tty)
843 {
844 struct usb_serial_port *port = tty->driver_data;
845 struct ti_port *tport = usb_get_serial_port_data(port);
846 unsigned int result;
847 unsigned int msr;
848 unsigned int mcr;
849 unsigned long flags;
850
851 if (tport == NULL)
852 return -ENODEV;
853
854 spin_lock_irqsave(&tport->tp_lock, flags);
855 msr = tport->tp_msr;
856 mcr = tport->tp_shadow_mcr;
857 spin_unlock_irqrestore(&tport->tp_lock, flags);
858
859 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
860 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
861 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
862 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
863 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
864 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
865 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
866
867 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
868
869 return result;
870 }
871
872
873 static int ti_tiocmset(struct tty_struct *tty,
874 unsigned int set, unsigned int clear)
875 {
876 struct usb_serial_port *port = tty->driver_data;
877 struct ti_port *tport = usb_get_serial_port_data(port);
878 unsigned int mcr;
879 unsigned long flags;
880
881 if (tport == NULL)
882 return -ENODEV;
883
884 spin_lock_irqsave(&tport->tp_lock, flags);
885 mcr = tport->tp_shadow_mcr;
886
887 if (set & TIOCM_RTS)
888 mcr |= TI_MCR_RTS;
889 if (set & TIOCM_DTR)
890 mcr |= TI_MCR_DTR;
891 if (set & TIOCM_LOOP)
892 mcr |= TI_MCR_LOOP;
893
894 if (clear & TIOCM_RTS)
895 mcr &= ~TI_MCR_RTS;
896 if (clear & TIOCM_DTR)
897 mcr &= ~TI_MCR_DTR;
898 if (clear & TIOCM_LOOP)
899 mcr &= ~TI_MCR_LOOP;
900 spin_unlock_irqrestore(&tport->tp_lock, flags);
901
902 return ti_set_mcr(tport, mcr);
903 }
904
905
906 static void ti_break(struct tty_struct *tty, int break_state)
907 {
908 struct usb_serial_port *port = tty->driver_data;
909 struct ti_port *tport = usb_get_serial_port_data(port);
910 int status;
911
912 dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
913
914 if (tport == NULL)
915 return;
916
917 status = ti_write_byte(port, tport->tp_tdev,
918 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
919 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
920
921 if (status)
922 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
923 }
924
925
926 static void ti_interrupt_callback(struct urb *urb)
927 {
928 struct ti_device *tdev = urb->context;
929 struct usb_serial_port *port;
930 struct usb_serial *serial = tdev->td_serial;
931 struct ti_port *tport;
932 struct device *dev = &urb->dev->dev;
933 unsigned char *data = urb->transfer_buffer;
934 int length = urb->actual_length;
935 int port_number;
936 int function;
937 int status = urb->status;
938 int retval;
939 __u8 msr;
940
941 switch (status) {
942 case 0:
943 break;
944 case -ECONNRESET:
945 case -ENOENT:
946 case -ESHUTDOWN:
947 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
948 tdev->td_urb_error = 1;
949 return;
950 default:
951 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
952 tdev->td_urb_error = 1;
953 goto exit;
954 }
955
956 if (length != 2) {
957 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
958 goto exit;
959 }
960
961 if (data[0] == TI_CODE_HARDWARE_ERROR) {
962 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
963 goto exit;
964 }
965
966 port_number = TI_GET_PORT_FROM_CODE(data[0]);
967 function = TI_GET_FUNC_FROM_CODE(data[0]);
968
969 dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
970 __func__, port_number, function, data[1]);
971
972 if (port_number >= serial->num_ports) {
973 dev_err(dev, "%s - bad port number, %d\n",
974 __func__, port_number);
975 goto exit;
976 }
977
978 port = serial->port[port_number];
979
980 tport = usb_get_serial_port_data(port);
981 if (!tport)
982 goto exit;
983
984 switch (function) {
985 case TI_CODE_DATA_ERROR:
986 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
987 __func__, port_number, data[1]);
988 break;
989
990 case TI_CODE_MODEM_STATUS:
991 msr = data[1];
992 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
993 ti_handle_new_msr(tport, msr);
994 break;
995
996 default:
997 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
998 __func__, data[1]);
999 break;
1000 }
1001
1002 exit:
1003 retval = usb_submit_urb(urb, GFP_ATOMIC);
1004 if (retval)
1005 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1006 __func__, retval);
1007 }
1008
1009
1010 static void ti_bulk_in_callback(struct urb *urb)
1011 {
1012 struct ti_port *tport = urb->context;
1013 struct usb_serial_port *port = tport->tp_port;
1014 struct device *dev = &urb->dev->dev;
1015 int status = urb->status;
1016 int retval = 0;
1017
1018 switch (status) {
1019 case 0:
1020 break;
1021 case -ECONNRESET:
1022 case -ENOENT:
1023 case -ESHUTDOWN:
1024 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1025 tport->tp_tdev->td_urb_error = 1;
1026 return;
1027 default:
1028 dev_err(dev, "%s - nonzero urb status, %d\n",
1029 __func__, status);
1030 tport->tp_tdev->td_urb_error = 1;
1031 }
1032
1033 if (status == -EPIPE)
1034 goto exit;
1035
1036 if (status) {
1037 dev_err(dev, "%s - stopping read!\n", __func__);
1038 return;
1039 }
1040
1041 if (urb->actual_length) {
1042 usb_serial_debug_data(dev, __func__, urb->actual_length,
1043 urb->transfer_buffer);
1044
1045 if (!tport->tp_is_open)
1046 dev_dbg(dev, "%s - port closed, dropping data\n",
1047 __func__);
1048 else
1049 ti_recv(port, urb->transfer_buffer, urb->actual_length);
1050 spin_lock(&tport->tp_lock);
1051 port->icount.rx += urb->actual_length;
1052 spin_unlock(&tport->tp_lock);
1053 }
1054
1055 exit:
1056 /* continue to read unless stopping */
1057 spin_lock(&tport->tp_lock);
1058 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1059 retval = usb_submit_urb(urb, GFP_ATOMIC);
1060 else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1061 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1062
1063 spin_unlock(&tport->tp_lock);
1064 if (retval)
1065 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1066 __func__, retval);
1067 }
1068
1069
1070 static void ti_bulk_out_callback(struct urb *urb)
1071 {
1072 struct ti_port *tport = urb->context;
1073 struct usb_serial_port *port = tport->tp_port;
1074 int status = urb->status;
1075
1076 tport->tp_write_urb_in_use = 0;
1077
1078 switch (status) {
1079 case 0:
1080 break;
1081 case -ECONNRESET:
1082 case -ENOENT:
1083 case -ESHUTDOWN:
1084 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1085 tport->tp_tdev->td_urb_error = 1;
1086 return;
1087 default:
1088 dev_err_console(port, "%s - nonzero urb status, %d\n",
1089 __func__, status);
1090 tport->tp_tdev->td_urb_error = 1;
1091 }
1092
1093 /* send any buffered data */
1094 ti_send(tport);
1095 }
1096
1097
1098 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1099 int length)
1100 {
1101 int cnt;
1102
1103 do {
1104 cnt = tty_insert_flip_string(&port->port, data, length);
1105 if (cnt < length) {
1106 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1107 __func__, length - cnt);
1108 if (cnt == 0)
1109 break;
1110 }
1111 tty_flip_buffer_push(&port->port);
1112 data += cnt;
1113 length -= cnt;
1114 } while (length > 0);
1115 }
1116
1117
1118 static void ti_send(struct ti_port *tport)
1119 {
1120 int count, result;
1121 struct usb_serial_port *port = tport->tp_port;
1122 unsigned long flags;
1123
1124 spin_lock_irqsave(&tport->tp_lock, flags);
1125
1126 if (tport->tp_write_urb_in_use)
1127 goto unlock;
1128
1129 count = kfifo_out(&port->write_fifo,
1130 port->write_urb->transfer_buffer,
1131 port->bulk_out_size);
1132
1133 if (count == 0)
1134 goto unlock;
1135
1136 tport->tp_write_urb_in_use = 1;
1137
1138 spin_unlock_irqrestore(&tport->tp_lock, flags);
1139
1140 usb_serial_debug_data(&port->dev, __func__, count,
1141 port->write_urb->transfer_buffer);
1142
1143 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1144 usb_sndbulkpipe(port->serial->dev,
1145 port->bulk_out_endpointAddress),
1146 port->write_urb->transfer_buffer, count,
1147 ti_bulk_out_callback, tport);
1148
1149 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1150 if (result) {
1151 dev_err_console(port, "%s - submit write urb failed, %d\n",
1152 __func__, result);
1153 tport->tp_write_urb_in_use = 0;
1154 /* TODO: reschedule ti_send */
1155 } else {
1156 spin_lock_irqsave(&tport->tp_lock, flags);
1157 port->icount.tx += count;
1158 spin_unlock_irqrestore(&tport->tp_lock, flags);
1159 }
1160
1161 /* more room in the buffer for new writes, wakeup */
1162 tty_port_tty_wakeup(&port->port);
1163
1164 return;
1165 unlock:
1166 spin_unlock_irqrestore(&tport->tp_lock, flags);
1167 return;
1168 }
1169
1170
1171 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1172 {
1173 unsigned long flags;
1174 int status;
1175
1176 status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1177 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1178 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1179
1180 spin_lock_irqsave(&tport->tp_lock, flags);
1181 if (!status)
1182 tport->tp_shadow_mcr = mcr;
1183 spin_unlock_irqrestore(&tport->tp_lock, flags);
1184
1185 return status;
1186 }
1187
1188
1189 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1190 {
1191 int size, status;
1192 struct ti_device *tdev = tport->tp_tdev;
1193 struct usb_serial_port *port = tport->tp_port;
1194 int port_number = port->port_number;
1195 struct ti_port_status *data;
1196
1197 size = sizeof(struct ti_port_status);
1198 data = kmalloc(size, GFP_KERNEL);
1199 if (!data) {
1200 dev_err(&port->dev, "%s - out of memory\n", __func__);
1201 return -ENOMEM;
1202 }
1203
1204 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1205 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1206 if (status) {
1207 dev_err(&port->dev,
1208 "%s - get port status command failed, %d\n",
1209 __func__, status);
1210 goto free_data;
1211 }
1212
1213 dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1214
1215 *lsr = data->bLSR;
1216
1217 free_data:
1218 kfree(data);
1219 return status;
1220 }
1221
1222
1223 static int ti_get_serial_info(struct ti_port *tport,
1224 struct serial_struct __user *ret_arg)
1225 {
1226 struct usb_serial_port *port = tport->tp_port;
1227 struct serial_struct ret_serial;
1228 unsigned cwait;
1229
1230 if (!ret_arg)
1231 return -EFAULT;
1232
1233 cwait = port->port.closing_wait;
1234 if (cwait != ASYNC_CLOSING_WAIT_NONE)
1235 cwait = jiffies_to_msecs(cwait) / 10;
1236
1237 memset(&ret_serial, 0, sizeof(ret_serial));
1238
1239 ret_serial.type = PORT_16550A;
1240 ret_serial.line = port->minor;
1241 ret_serial.port = port->port_number;
1242 ret_serial.flags = tport->tp_flags;
1243 ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1244 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1245 ret_serial.closing_wait = cwait;
1246
1247 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1248 return -EFAULT;
1249
1250 return 0;
1251 }
1252
1253
1254 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1255 struct serial_struct __user *new_arg)
1256 {
1257 struct serial_struct new_serial;
1258 unsigned cwait;
1259
1260 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1261 return -EFAULT;
1262
1263 cwait = new_serial.closing_wait;
1264 if (cwait != ASYNC_CLOSING_WAIT_NONE)
1265 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1266
1267 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1268 tport->tp_port->port.closing_wait = cwait;
1269
1270 return 0;
1271 }
1272
1273
1274 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1275 {
1276 struct async_icount *icount;
1277 struct tty_struct *tty;
1278 unsigned long flags;
1279
1280 dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1281
1282 if (msr & TI_MSR_DELTA_MASK) {
1283 spin_lock_irqsave(&tport->tp_lock, flags);
1284 icount = &tport->tp_port->icount;
1285 if (msr & TI_MSR_DELTA_CTS)
1286 icount->cts++;
1287 if (msr & TI_MSR_DELTA_DSR)
1288 icount->dsr++;
1289 if (msr & TI_MSR_DELTA_CD)
1290 icount->dcd++;
1291 if (msr & TI_MSR_DELTA_RI)
1292 icount->rng++;
1293 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1294 spin_unlock_irqrestore(&tport->tp_lock, flags);
1295 }
1296
1297 tport->tp_msr = msr & TI_MSR_MASK;
1298
1299 /* handle CTS flow control */
1300 tty = tty_port_tty_get(&tport->tp_port->port);
1301 if (tty && C_CRTSCTS(tty)) {
1302 if (msr & TI_MSR_CTS) {
1303 tty->hw_stopped = 0;
1304 tty_wakeup(tty);
1305 } else {
1306 tty->hw_stopped = 1;
1307 }
1308 }
1309 tty_kref_put(tty);
1310 }
1311
1312
1313 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1314 {
1315 unsigned long flags;
1316
1317 spin_lock_irqsave(&tport->tp_lock, flags);
1318
1319 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1320 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1321
1322 spin_unlock_irqrestore(&tport->tp_lock, flags);
1323 }
1324
1325
1326 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1327 {
1328 struct urb *urb;
1329 int status = 0;
1330 unsigned long flags;
1331
1332 spin_lock_irqsave(&tport->tp_lock, flags);
1333
1334 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1335 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1336 urb = tport->tp_port->read_urb;
1337 spin_unlock_irqrestore(&tport->tp_lock, flags);
1338 urb->context = tport;
1339 status = usb_submit_urb(urb, GFP_KERNEL);
1340 } else {
1341 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1342 spin_unlock_irqrestore(&tport->tp_lock, flags);
1343 }
1344
1345 return status;
1346 }
1347
1348
1349 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1350 __u16 moduleid, __u16 value, __u8 *data, int size)
1351 {
1352 int status;
1353
1354 status = usb_control_msg(tdev->td_serial->dev,
1355 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1356 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1357 value, moduleid, data, size, 1000);
1358
1359 if (status == size)
1360 status = 0;
1361
1362 if (status > 0)
1363 status = -ECOMM;
1364
1365 return status;
1366 }
1367
1368
1369 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1370 __u16 moduleid, __u16 value, __u8 *data, int size)
1371 {
1372 int status;
1373
1374 status = usb_control_msg(tdev->td_serial->dev,
1375 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1376 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1377 value, moduleid, data, size, 1000);
1378
1379 if (status == size)
1380 status = 0;
1381
1382 if (status > 0)
1383 status = -ECOMM;
1384
1385 return status;
1386 }
1387
1388
1389 static int ti_write_byte(struct usb_serial_port *port,
1390 struct ti_device *tdev, unsigned long addr,
1391 __u8 mask, __u8 byte)
1392 {
1393 int status;
1394 unsigned int size;
1395 struct ti_write_data_bytes *data;
1396
1397 dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1398 addr, mask, byte);
1399
1400 size = sizeof(struct ti_write_data_bytes) + 2;
1401 data = kmalloc(size, GFP_KERNEL);
1402 if (!data) {
1403 dev_err(&port->dev, "%s - out of memory\n", __func__);
1404 return -ENOMEM;
1405 }
1406
1407 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1408 data->bDataType = TI_RW_DATA_BYTE;
1409 data->bDataCounter = 1;
1410 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1411 data->wBaseAddrLo = cpu_to_be16(addr);
1412 data->bData[0] = mask;
1413 data->bData[1] = byte;
1414
1415 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1416 (__u8 *)data, size);
1417
1418 if (status < 0)
1419 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1420
1421 kfree(data);
1422
1423 return status;
1424 }
1425
1426 static int ti_do_download(struct usb_device *dev, int pipe,
1427 u8 *buffer, int size)
1428 {
1429 int pos;
1430 u8 cs = 0;
1431 int done;
1432 struct ti_firmware_header *header;
1433 int status = 0;
1434 int len;
1435
1436 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1437 cs = (__u8)(cs + buffer[pos]);
1438
1439 header = (struct ti_firmware_header *)buffer;
1440 header->wLength = cpu_to_le16((__u16)(size
1441 - sizeof(struct ti_firmware_header)));
1442 header->bCheckSum = cs;
1443
1444 dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1445 for (pos = 0; pos < size; pos += done) {
1446 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1447 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1448 &done, 1000);
1449 if (status)
1450 break;
1451 }
1452 return status;
1453 }
1454
1455 static int ti_download_firmware(struct ti_device *tdev)
1456 {
1457 int status;
1458 int buffer_size;
1459 __u8 *buffer;
1460 struct usb_device *dev = tdev->td_serial->dev;
1461 unsigned int pipe = usb_sndbulkpipe(dev,
1462 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1463 const struct firmware *fw_p;
1464 char buf[32];
1465
1466 /* try ID specific firmware first, then try generic firmware */
1467 sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1468 le16_to_cpu(dev->descriptor.idVendor),
1469 le16_to_cpu(dev->descriptor.idProduct));
1470 status = request_firmware(&fw_p, buf, &dev->dev);
1471
1472 if (status != 0) {
1473 buf[0] = '\0';
1474 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1475 switch (le16_to_cpu(dev->descriptor.idProduct)) {
1476 case MTS_CDMA_PRODUCT_ID:
1477 strcpy(buf, "mts_cdma.fw");
1478 break;
1479 case MTS_GSM_PRODUCT_ID:
1480 strcpy(buf, "mts_gsm.fw");
1481 break;
1482 case MTS_EDGE_PRODUCT_ID:
1483 strcpy(buf, "mts_edge.fw");
1484 break;
1485 case MTS_MT9234MU_PRODUCT_ID:
1486 strcpy(buf, "mts_mt9234mu.fw");
1487 break;
1488 case MTS_MT9234ZBA_PRODUCT_ID:
1489 strcpy(buf, "mts_mt9234zba.fw");
1490 break;
1491 case MTS_MT9234ZBAOLD_PRODUCT_ID:
1492 strcpy(buf, "mts_mt9234zba.fw");
1493 break; }
1494 }
1495 if (buf[0] == '\0') {
1496 if (tdev->td_is_3410)
1497 strcpy(buf, "ti_3410.fw");
1498 else
1499 strcpy(buf, "ti_5052.fw");
1500 }
1501 status = request_firmware(&fw_p, buf, &dev->dev);
1502 }
1503 if (status) {
1504 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1505 return -ENOENT;
1506 }
1507 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1508 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1509 release_firmware(fw_p);
1510 return -ENOENT;
1511 }
1512
1513 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1514 buffer = kmalloc(buffer_size, GFP_KERNEL);
1515 if (buffer) {
1516 memcpy(buffer, fw_p->data, fw_p->size);
1517 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1518 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1519 kfree(buffer);
1520 } else {
1521 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1522 status = -ENOMEM;
1523 }
1524 release_firmware(fw_p);
1525 if (status) {
1526 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1527 __func__, status);
1528 return status;
1529 }
1530
1531 dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1532
1533 return 0;
1534 }
Linux kernel - Deliverables
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