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