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spi-topcliff-pch: add recovery processing in case wait-event timeout
[zen-stable.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob75b838eff178ca743a3f53069ef2d515cb6f0b15
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_VERSION "v0.10"
44 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
46
47 #define TI_FIRMWARE_BUF_SIZE 16284
48
49 #define TI_WRITE_BUF_SIZE 1024
50
51 #define TI_TRANSFER_TIMEOUT 2
52
53 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
54
55 /* supported setserial flags */
56 #define TI_SET_SERIAL_FLAGS 0
57
58 /* read urb states */
59 #define TI_READ_URB_RUNNING 0
60 #define TI_READ_URB_STOPPING 1
61 #define TI_READ_URB_STOPPED 2
62
63 #define TI_EXTRA_VID_PID_COUNT 5
64
65
66 /* Structures */
67
68 struct ti_port {
69 int tp_is_open;
70 __u8 tp_msr;
71 __u8 tp_lsr;
72 __u8 tp_shadow_mcr;
73 __u8 tp_uart_mode; /* 232 or 485 modes */
74 unsigned int tp_uart_base_addr;
75 int tp_flags;
76 int tp_closing_wait;/* in .01 secs */
77 struct async_icount tp_icount;
78 wait_queue_head_t tp_msr_wait; /* wait for msr change */
79 wait_queue_head_t tp_write_wait;
80 struct ti_device *tp_tdev;
81 struct usb_serial_port *tp_port;
82 spinlock_t tp_lock;
83 int tp_read_urb_state;
84 int tp_write_urb_in_use;
85 struct kfifo write_fifo;
86 };
87
88 struct ti_device {
89 struct mutex td_open_close_lock;
90 int td_open_port_count;
91 struct usb_serial *td_serial;
92 int td_is_3410;
93 int td_urb_error;
94 };
95
96
97 /* Function Declarations */
98
99 static int ti_startup(struct usb_serial *serial);
100 static void ti_release(struct usb_serial *serial);
101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
102 static void ti_close(struct usb_serial_port *port);
103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
104 const unsigned char *data, int count);
105 static int ti_write_room(struct tty_struct *tty);
106 static int ti_chars_in_buffer(struct tty_struct *tty);
107 static void ti_throttle(struct tty_struct *tty);
108 static void ti_unthrottle(struct tty_struct *tty);
109 static int ti_ioctl(struct tty_struct *tty,
110 unsigned int cmd, unsigned long arg);
111 static int ti_get_icount(struct tty_struct *tty,
112 struct serial_icounter_struct *icount);
113 static void ti_set_termios(struct tty_struct *tty,
114 struct usb_serial_port *port, struct ktermios *old_termios);
115 static int ti_tiocmget(struct tty_struct *tty);
116 static int ti_tiocmset(struct tty_struct *tty,
117 unsigned int set, unsigned int clear);
118 static void ti_break(struct tty_struct *tty, int break_state);
119 static void ti_interrupt_callback(struct urb *urb);
120 static void ti_bulk_in_callback(struct urb *urb);
121 static void ti_bulk_out_callback(struct urb *urb);
122
123 static void ti_recv(struct device *dev, struct tty_struct *tty,
124 unsigned char *data, int length);
125 static void ti_send(struct ti_port *tport);
126 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
127 static int ti_get_lsr(struct ti_port *tport);
128 static int ti_get_serial_info(struct ti_port *tport,
129 struct serial_struct __user *ret_arg);
130 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
131 struct serial_struct __user *new_arg);
132 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
133
134 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
135
136 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
137 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
138
139 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
140 __u16 moduleid, __u16 value, __u8 *data, int size);
141 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
142 __u16 moduleid, __u16 value, __u8 *data, int size);
143
144 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
145 __u8 mask, __u8 byte);
146
147 static int ti_download_firmware(struct ti_device *tdev);
148
149
150 /* Data */
151
152 /* module parameters */
153 static bool debug;
154 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
155 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
156 static unsigned int vendor_3410_count;
157 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
158 static unsigned int product_3410_count;
159 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
160 static unsigned int vendor_5052_count;
161 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
162 static unsigned int product_5052_count;
163
164 /* supported devices */
165 /* the array dimension is the number of default entries plus */
166 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
167 /* null entry */
168 static struct usb_device_id ti_id_table_3410[14+TI_EXTRA_VID_PID_COUNT+1] = {
169 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
170 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
171 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
172 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
173 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
174 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
175 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
176 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
177 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
178 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
179 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
180 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
181 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
182 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
183 };
184
185 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
186 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
187 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
188 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
189 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
190 };
191
192 static struct usb_device_id ti_id_table_combined[18+2*TI_EXTRA_VID_PID_COUNT+1] = {
193 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
194 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
195 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
196 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
197 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
198 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
199 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
200 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
202 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
203 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
204 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
205 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
206 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
207 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
208 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
209 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
210 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
211 { }
212 };
213
214 static struct usb_driver ti_usb_driver = {
215 .name = "ti_usb_3410_5052",
216 .probe = usb_serial_probe,
217 .disconnect = usb_serial_disconnect,
218 .id_table = ti_id_table_combined,
219 .no_dynamic_id = 1,
220 };
221
222 static struct usb_serial_driver ti_1port_device = {
223 .driver = {
224 .owner = THIS_MODULE,
225 .name = "ti_usb_3410_5052_1",
226 },
227 .description = "TI USB 3410 1 port adapter",
228 .usb_driver = &ti_usb_driver,
229 .id_table = ti_id_table_3410,
230 .num_ports = 1,
231 .attach = ti_startup,
232 .release = ti_release,
233 .open = ti_open,
234 .close = ti_close,
235 .write = ti_write,
236 .write_room = ti_write_room,
237 .chars_in_buffer = ti_chars_in_buffer,
238 .throttle = ti_throttle,
239 .unthrottle = ti_unthrottle,
240 .ioctl = ti_ioctl,
241 .set_termios = ti_set_termios,
242 .tiocmget = ti_tiocmget,
243 .tiocmset = ti_tiocmset,
244 .get_icount = ti_get_icount,
245 .break_ctl = ti_break,
246 .read_int_callback = ti_interrupt_callback,
247 .read_bulk_callback = ti_bulk_in_callback,
248 .write_bulk_callback = ti_bulk_out_callback,
249 };
250
251 static struct usb_serial_driver ti_2port_device = {
252 .driver = {
253 .owner = THIS_MODULE,
254 .name = "ti_usb_3410_5052_2",
255 },
256 .description = "TI USB 5052 2 port adapter",
257 .usb_driver = &ti_usb_driver,
258 .id_table = ti_id_table_5052,
259 .num_ports = 2,
260 .attach = ti_startup,
261 .release = ti_release,
262 .open = ti_open,
263 .close = ti_close,
264 .write = ti_write,
265 .write_room = ti_write_room,
266 .chars_in_buffer = ti_chars_in_buffer,
267 .throttle = ti_throttle,
268 .unthrottle = ti_unthrottle,
269 .ioctl = ti_ioctl,
270 .set_termios = ti_set_termios,
271 .tiocmget = ti_tiocmget,
272 .tiocmset = ti_tiocmset,
273 .get_icount = ti_get_icount,
274 .break_ctl = ti_break,
275 .read_int_callback = ti_interrupt_callback,
276 .read_bulk_callback = ti_bulk_in_callback,
277 .write_bulk_callback = ti_bulk_out_callback,
278 };
279
280
281 /* Module */
282
283 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
284 MODULE_DESCRIPTION(TI_DRIVER_DESC);
285 MODULE_VERSION(TI_DRIVER_VERSION);
286 MODULE_LICENSE("GPL");
287
288 MODULE_FIRMWARE("ti_3410.fw");
289 MODULE_FIRMWARE("ti_5052.fw");
290 MODULE_FIRMWARE("mts_cdma.fw");
291 MODULE_FIRMWARE("mts_gsm.fw");
292 MODULE_FIRMWARE("mts_edge.fw");
293 MODULE_FIRMWARE("mts_mt9234mu.fw");
294 MODULE_FIRMWARE("mts_mt9234zba.fw");
295
296 module_param(debug, bool, S_IRUGO | S_IWUSR);
297 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
298
299 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
300 MODULE_PARM_DESC(closing_wait,
301 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
302
303 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
304 MODULE_PARM_DESC(vendor_3410,
305 "Vendor ids for 3410 based devices, 1-5 short integers");
306 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
307 MODULE_PARM_DESC(product_3410,
308 "Product ids for 3410 based devices, 1-5 short integers");
309 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
310 MODULE_PARM_DESC(vendor_5052,
311 "Vendor ids for 5052 based devices, 1-5 short integers");
312 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
313 MODULE_PARM_DESC(product_5052,
314 "Product ids for 5052 based devices, 1-5 short integers");
315
316 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
317
318
319 /* Functions */
320
321 static int __init ti_init(void)
322 {
323 int i, j, c;
324 int ret;
325
326 /* insert extra vendor and product ids */
327 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
328 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
329 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
330 ti_id_table_3410[j].idVendor = vendor_3410[i];
331 ti_id_table_3410[j].idProduct = product_3410[i];
332 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
333 ti_id_table_combined[c].idVendor = vendor_3410[i];
334 ti_id_table_combined[c].idProduct = product_3410[i];
335 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
336 }
337 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
338 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
339 ti_id_table_5052[j].idVendor = vendor_5052[i];
340 ti_id_table_5052[j].idProduct = product_5052[i];
341 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
342 ti_id_table_combined[c].idVendor = vendor_5052[i];
343 ti_id_table_combined[c].idProduct = product_5052[i];
344 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
345 }
346
347 ret = usb_serial_register(&ti_1port_device);
348 if (ret)
349 goto failed_1port;
350 ret = usb_serial_register(&ti_2port_device);
351 if (ret)
352 goto failed_2port;
353
354 ret = usb_register(&ti_usb_driver);
355 if (ret)
356 goto failed_usb;
357
358 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
359 TI_DRIVER_DESC "\n");
360
361 return 0;
362
363 failed_usb:
364 usb_serial_deregister(&ti_2port_device);
365 failed_2port:
366 usb_serial_deregister(&ti_1port_device);
367 failed_1port:
368 return ret;
369 }
370
371
372 static void __exit ti_exit(void)
373 {
374 usb_deregister(&ti_usb_driver);
375 usb_serial_deregister(&ti_1port_device);
376 usb_serial_deregister(&ti_2port_device);
377 }
378
379
380 module_init(ti_init);
381 module_exit(ti_exit);
382
383
384 static int ti_startup(struct usb_serial *serial)
385 {
386 struct ti_device *tdev;
387 struct ti_port *tport;
388 struct usb_device *dev = serial->dev;
389 int status;
390 int i;
391
392
393 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
394 __func__, le16_to_cpu(dev->descriptor.idProduct),
395 dev->descriptor.bNumConfigurations,
396 dev->actconfig->desc.bConfigurationValue);
397
398 /* create device structure */
399 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
400 if (tdev == NULL) {
401 dev_err(&dev->dev, "%s - out of memory\n", __func__);
402 return -ENOMEM;
403 }
404 mutex_init(&tdev->td_open_close_lock);
405 tdev->td_serial = serial;
406 usb_set_serial_data(serial, tdev);
407
408 /* determine device type */
409 if (usb_match_id(serial->interface, ti_id_table_3410))
410 tdev->td_is_3410 = 1;
411 dbg("%s - device type is %s", __func__,
412 tdev->td_is_3410 ? "3410" : "5052");
413
414 /* if we have only 1 configuration, download firmware */
415 if (dev->descriptor.bNumConfigurations == 1) {
416 if ((status = ti_download_firmware(tdev)) != 0)
417 goto free_tdev;
418
419 /* 3410 must be reset, 5052 resets itself */
420 if (tdev->td_is_3410) {
421 msleep_interruptible(100);
422 usb_reset_device(dev);
423 }
424
425 status = -ENODEV;
426 goto free_tdev;
427 }
428
429 /* the second configuration must be set */
430 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
431 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
432 status = status ? status : -ENODEV;
433 goto free_tdev;
434 }
435
436 /* set up port structures */
437 for (i = 0; i < serial->num_ports; ++i) {
438 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
439 if (tport == NULL) {
440 dev_err(&dev->dev, "%s - out of memory\n", __func__);
441 status = -ENOMEM;
442 goto free_tports;
443 }
444 spin_lock_init(&tport->tp_lock);
445 tport->tp_uart_base_addr = (i == 0 ?
446 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
447 tport->tp_closing_wait = closing_wait;
448 init_waitqueue_head(&tport->tp_msr_wait);
449 init_waitqueue_head(&tport->tp_write_wait);
450 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
451 GFP_KERNEL)) {
452 dev_err(&dev->dev, "%s - out of memory\n", __func__);
453 kfree(tport);
454 status = -ENOMEM;
455 goto free_tports;
456 }
457 tport->tp_port = serial->port[i];
458 tport->tp_tdev = tdev;
459 usb_set_serial_port_data(serial->port[i], tport);
460 tport->tp_uart_mode = 0; /* default is RS232 */
461 }
462
463 return 0;
464
465 free_tports:
466 for (--i; i >= 0; --i) {
467 tport = usb_get_serial_port_data(serial->port[i]);
468 kfifo_free(&tport->write_fifo);
469 kfree(tport);
470 usb_set_serial_port_data(serial->port[i], NULL);
471 }
472 free_tdev:
473 kfree(tdev);
474 usb_set_serial_data(serial, NULL);
475 return status;
476 }
477
478
479 static void ti_release(struct usb_serial *serial)
480 {
481 int i;
482 struct ti_device *tdev = usb_get_serial_data(serial);
483 struct ti_port *tport;
484
485 dbg("%s", __func__);
486
487 for (i = 0; i < serial->num_ports; ++i) {
488 tport = usb_get_serial_port_data(serial->port[i]);
489 if (tport) {
490 kfifo_free(&tport->write_fifo);
491 kfree(tport);
492 }
493 }
494
495 kfree(tdev);
496 }
497
498
499 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
500 {
501 struct ti_port *tport = usb_get_serial_port_data(port);
502 struct ti_device *tdev;
503 struct usb_device *dev;
504 struct urb *urb;
505 int port_number;
506 int status;
507 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
508 TI_PIPE_TIMEOUT_ENABLE |
509 (TI_TRANSFER_TIMEOUT << 2));
510
511 dbg("%s - port %d", __func__, port->number);
512
513 if (tport == NULL)
514 return -ENODEV;
515
516 dev = port->serial->dev;
517 tdev = tport->tp_tdev;
518
519 /* only one open on any port on a device at a time */
520 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
521 return -ERESTARTSYS;
522
523 port_number = port->number - port->serial->minor;
524
525 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
526
527 tport->tp_msr = 0;
528 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
529
530 /* start interrupt urb the first time a port is opened on this device */
531 if (tdev->td_open_port_count == 0) {
532 dbg("%s - start interrupt in urb", __func__);
533 urb = tdev->td_serial->port[0]->interrupt_in_urb;
534 if (!urb) {
535 dev_err(&port->dev, "%s - no interrupt urb\n",
536 __func__);
537 status = -EINVAL;
538 goto release_lock;
539 }
540 urb->context = tdev;
541 status = usb_submit_urb(urb, GFP_KERNEL);
542 if (status) {
543 dev_err(&port->dev,
544 "%s - submit interrupt urb failed, %d\n",
545 __func__, status);
546 goto release_lock;
547 }
548 }
549
550 if (tty)
551 ti_set_termios(tty, port, tty->termios);
552
553 dbg("%s - sending TI_OPEN_PORT", __func__);
554 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
555 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
556 if (status) {
557 dev_err(&port->dev, "%s - cannot send open command, %d\n",
558 __func__, status);
559 goto unlink_int_urb;
560 }
561
562 dbg("%s - sending TI_START_PORT", __func__);
563 status = ti_command_out_sync(tdev, TI_START_PORT,
564 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
565 if (status) {
566 dev_err(&port->dev, "%s - cannot send start command, %d\n",
567 __func__, status);
568 goto unlink_int_urb;
569 }
570
571 dbg("%s - sending TI_PURGE_PORT", __func__);
572 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
573 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
574 if (status) {
575 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
576 __func__, status);
577 goto unlink_int_urb;
578 }
579 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
580 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
581 if (status) {
582 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
583 __func__, status);
584 goto unlink_int_urb;
585 }
586
587 /* reset the data toggle on the bulk endpoints to work around bug in
588 * host controllers where things get out of sync some times */
589 usb_clear_halt(dev, port->write_urb->pipe);
590 usb_clear_halt(dev, port->read_urb->pipe);
591
592 if (tty)
593 ti_set_termios(tty, port, tty->termios);
594
595 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
596 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
597 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
598 if (status) {
599 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
600 __func__, status);
601 goto unlink_int_urb;
602 }
603
604 dbg("%s - sending TI_START_PORT (2)", __func__);
605 status = ti_command_out_sync(tdev, TI_START_PORT,
606 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
607 if (status) {
608 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
609 __func__, status);
610 goto unlink_int_urb;
611 }
612
613 /* start read urb */
614 dbg("%s - start read urb", __func__);
615 urb = port->read_urb;
616 if (!urb) {
617 dev_err(&port->dev, "%s - no read urb\n", __func__);
618 status = -EINVAL;
619 goto unlink_int_urb;
620 }
621 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
622 urb->context = tport;
623 status = usb_submit_urb(urb, GFP_KERNEL);
624 if (status) {
625 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
626 __func__, status);
627 goto unlink_int_urb;
628 }
629
630 tport->tp_is_open = 1;
631 ++tdev->td_open_port_count;
632
633 goto release_lock;
634
635 unlink_int_urb:
636 if (tdev->td_open_port_count == 0)
637 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
638 release_lock:
639 mutex_unlock(&tdev->td_open_close_lock);
640 dbg("%s - exit %d", __func__, status);
641 return status;
642 }
643
644
645 static void ti_close(struct usb_serial_port *port)
646 {
647 struct ti_device *tdev;
648 struct ti_port *tport;
649 int port_number;
650 int status;
651 int do_unlock;
652
653 dbg("%s - port %d", __func__, port->number);
654
655 tdev = usb_get_serial_data(port->serial);
656 tport = usb_get_serial_port_data(port);
657 if (tdev == NULL || tport == NULL)
658 return;
659
660 tport->tp_is_open = 0;
661
662 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
663
664 usb_kill_urb(port->read_urb);
665 usb_kill_urb(port->write_urb);
666 tport->tp_write_urb_in_use = 0;
667
668 port_number = port->number - port->serial->minor;
669
670 dbg("%s - sending TI_CLOSE_PORT", __func__);
671 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
672 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
673 if (status)
674 dev_err(&port->dev,
675 "%s - cannot send close port command, %d\n"
676 , __func__, status);
677
678 /* if mutex_lock is interrupted, continue anyway */
679 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
680 --tport->tp_tdev->td_open_port_count;
681 if (tport->tp_tdev->td_open_port_count <= 0) {
682 /* last port is closed, shut down interrupt urb */
683 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
684 tport->tp_tdev->td_open_port_count = 0;
685 }
686 if (do_unlock)
687 mutex_unlock(&tdev->td_open_close_lock);
688
689 dbg("%s - exit", __func__);
690 }
691
692
693 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
694 const unsigned char *data, int count)
695 {
696 struct ti_port *tport = usb_get_serial_port_data(port);
697
698 dbg("%s - port %d", __func__, port->number);
699
700 if (count == 0) {
701 dbg("%s - write request of 0 bytes", __func__);
702 return 0;
703 }
704
705 if (tport == NULL || !tport->tp_is_open)
706 return -ENODEV;
707
708 count = kfifo_in_locked(&tport->write_fifo, data, count,
709 &tport->tp_lock);
710 ti_send(tport);
711
712 return count;
713 }
714
715
716 static int ti_write_room(struct tty_struct *tty)
717 {
718 struct usb_serial_port *port = tty->driver_data;
719 struct ti_port *tport = usb_get_serial_port_data(port);
720 int room = 0;
721 unsigned long flags;
722
723 dbg("%s - port %d", __func__, port->number);
724
725 if (tport == NULL)
726 return 0;
727
728 spin_lock_irqsave(&tport->tp_lock, flags);
729 room = kfifo_avail(&tport->write_fifo);
730 spin_unlock_irqrestore(&tport->tp_lock, flags);
731
732 dbg("%s - returns %d", __func__, room);
733 return room;
734 }
735
736
737 static int ti_chars_in_buffer(struct tty_struct *tty)
738 {
739 struct usb_serial_port *port = tty->driver_data;
740 struct ti_port *tport = usb_get_serial_port_data(port);
741 int chars = 0;
742 unsigned long flags;
743
744 dbg("%s - port %d", __func__, port->number);
745
746 if (tport == NULL)
747 return 0;
748
749 spin_lock_irqsave(&tport->tp_lock, flags);
750 chars = kfifo_len(&tport->write_fifo);
751 spin_unlock_irqrestore(&tport->tp_lock, flags);
752
753 dbg("%s - returns %d", __func__, chars);
754 return chars;
755 }
756
757
758 static void ti_throttle(struct tty_struct *tty)
759 {
760 struct usb_serial_port *port = tty->driver_data;
761 struct ti_port *tport = usb_get_serial_port_data(port);
762
763 dbg("%s - port %d", __func__, port->number);
764
765 if (tport == NULL)
766 return;
767
768 if (I_IXOFF(tty) || C_CRTSCTS(tty))
769 ti_stop_read(tport, tty);
770
771 }
772
773
774 static void ti_unthrottle(struct tty_struct *tty)
775 {
776 struct usb_serial_port *port = tty->driver_data;
777 struct ti_port *tport = usb_get_serial_port_data(port);
778 int status;
779
780 dbg("%s - port %d", __func__, port->number);
781
782 if (tport == NULL)
783 return;
784
785 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
786 status = ti_restart_read(tport, tty);
787 if (status)
788 dev_err(&port->dev, "%s - cannot restart read, %d\n",
789 __func__, status);
790 }
791 }
792
793 static int ti_get_icount(struct tty_struct *tty,
794 struct serial_icounter_struct *icount)
795 {
796 struct usb_serial_port *port = tty->driver_data;
797 struct ti_port *tport = usb_get_serial_port_data(port);
798 struct async_icount cnow = tport->tp_icount;
799
800 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
801 __func__, port->number,
802 cnow.rx, cnow.tx);
803
804 icount->cts = cnow.cts;
805 icount->dsr = cnow.dsr;
806 icount->rng = cnow.rng;
807 icount->dcd = cnow.dcd;
808 icount->rx = cnow.rx;
809 icount->tx = cnow.tx;
810 icount->frame = cnow.frame;
811 icount->overrun = cnow.overrun;
812 icount->parity = cnow.parity;
813 icount->brk = cnow.brk;
814 icount->buf_overrun = cnow.buf_overrun;
815
816 return 0;
817 }
818
819 static int ti_ioctl(struct tty_struct *tty,
820 unsigned int cmd, unsigned long arg)
821 {
822 struct usb_serial_port *port = tty->driver_data;
823 struct ti_port *tport = usb_get_serial_port_data(port);
824 struct async_icount cnow;
825 struct async_icount cprev;
826
827 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
828
829 if (tport == NULL)
830 return -ENODEV;
831
832 switch (cmd) {
833 case TIOCGSERIAL:
834 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
835 return ti_get_serial_info(tport,
836 (struct serial_struct __user *)arg);
837 case TIOCSSERIAL:
838 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
839 return ti_set_serial_info(tty, tport,
840 (struct serial_struct __user *)arg);
841 case TIOCMIWAIT:
842 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
843 cprev = tport->tp_icount;
844 while (1) {
845 interruptible_sleep_on(&tport->tp_msr_wait);
846 if (signal_pending(current))
847 return -ERESTARTSYS;
848 cnow = tport->tp_icount;
849 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
850 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
851 return -EIO; /* no change => error */
852 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
853 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
854 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
855 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
856 return 0;
857 cprev = cnow;
858 }
859 break;
860 }
861 return -ENOIOCTLCMD;
862 }
863
864
865 static void ti_set_termios(struct tty_struct *tty,
866 struct usb_serial_port *port, struct ktermios *old_termios)
867 {
868 struct ti_port *tport = usb_get_serial_port_data(port);
869 struct ti_uart_config *config;
870 tcflag_t cflag, iflag;
871 int baud;
872 int status;
873 int port_number = port->number - port->serial->minor;
874 unsigned int mcr;
875
876 dbg("%s - port %d", __func__, port->number);
877
878 cflag = tty->termios->c_cflag;
879 iflag = tty->termios->c_iflag;
880
881 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
882 dbg("%s - old clfag %08x, old iflag %08x", __func__,
883 old_termios->c_cflag, old_termios->c_iflag);
884
885 if (tport == NULL)
886 return;
887
888 config = kmalloc(sizeof(*config), GFP_KERNEL);
889 if (!config) {
890 dev_err(&port->dev, "%s - out of memory\n", __func__);
891 return;
892 }
893
894 config->wFlags = 0;
895
896 /* these flags must be set */
897 config->wFlags |= TI_UART_ENABLE_MS_INTS;
898 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
899 config->bUartMode = (__u8)(tport->tp_uart_mode);
900
901 switch (cflag & CSIZE) {
902 case CS5:
903 config->bDataBits = TI_UART_5_DATA_BITS;
904 break;
905 case CS6:
906 config->bDataBits = TI_UART_6_DATA_BITS;
907 break;
908 case CS7:
909 config->bDataBits = TI_UART_7_DATA_BITS;
910 break;
911 default:
912 case CS8:
913 config->bDataBits = TI_UART_8_DATA_BITS;
914 break;
915 }
916
917 /* CMSPAR isn't supported by this driver */
918 tty->termios->c_cflag &= ~CMSPAR;
919
920 if (cflag & PARENB) {
921 if (cflag & PARODD) {
922 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
923 config->bParity = TI_UART_ODD_PARITY;
924 } else {
925 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
926 config->bParity = TI_UART_EVEN_PARITY;
927 }
928 } else {
929 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
930 config->bParity = TI_UART_NO_PARITY;
931 }
932
933 if (cflag & CSTOPB)
934 config->bStopBits = TI_UART_2_STOP_BITS;
935 else
936 config->bStopBits = TI_UART_1_STOP_BITS;
937
938 if (cflag & CRTSCTS) {
939 /* RTS flow control must be off to drop RTS for baud rate B0 */
940 if ((cflag & CBAUD) != B0)
941 config->wFlags |= TI_UART_ENABLE_RTS_IN;
942 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
943 } else {
944 tty->hw_stopped = 0;
945 ti_restart_read(tport, tty);
946 }
947
948 if (I_IXOFF(tty) || I_IXON(tty)) {
949 config->cXon = START_CHAR(tty);
950 config->cXoff = STOP_CHAR(tty);
951
952 if (I_IXOFF(tty))
953 config->wFlags |= TI_UART_ENABLE_X_IN;
954 else
955 ti_restart_read(tport, tty);
956
957 if (I_IXON(tty))
958 config->wFlags |= TI_UART_ENABLE_X_OUT;
959 }
960
961 baud = tty_get_baud_rate(tty);
962 if (!baud)
963 baud = 9600;
964 if (tport->tp_tdev->td_is_3410)
965 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
966 else
967 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
968
969 /* FIXME: Should calculate resulting baud here and report it back */
970 if ((cflag & CBAUD) != B0)
971 tty_encode_baud_rate(tty, baud, baud);
972
973 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
974 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
975
976 cpu_to_be16s(&config->wBaudRate);
977 cpu_to_be16s(&config->wFlags);
978
979 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
980 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
981 sizeof(*config));
982 if (status)
983 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
984 __func__, port_number, status);
985
986 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
987 mcr = tport->tp_shadow_mcr;
988 /* if baud rate is B0, clear RTS and DTR */
989 if ((cflag & CBAUD) == B0)
990 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
991 status = ti_set_mcr(tport, mcr);
992 if (status)
993 dev_err(&port->dev,
994 "%s - cannot set modem control on port %d, %d\n",
995 __func__, port_number, status);
996
997 kfree(config);
998 }
999
1000
1001 static int ti_tiocmget(struct tty_struct *tty)
1002 {
1003 struct usb_serial_port *port = tty->driver_data;
1004 struct ti_port *tport = usb_get_serial_port_data(port);
1005 unsigned int result;
1006 unsigned int msr;
1007 unsigned int mcr;
1008 unsigned long flags;
1009
1010 dbg("%s - port %d", __func__, port->number);
1011
1012 if (tport == NULL)
1013 return -ENODEV;
1014
1015 spin_lock_irqsave(&tport->tp_lock, flags);
1016 msr = tport->tp_msr;
1017 mcr = tport->tp_shadow_mcr;
1018 spin_unlock_irqrestore(&tport->tp_lock, flags);
1019
1020 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1021 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1022 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1023 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1024 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1025 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1026 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1027
1028 dbg("%s - 0x%04X", __func__, result);
1029
1030 return result;
1031 }
1032
1033
1034 static int ti_tiocmset(struct tty_struct *tty,
1035 unsigned int set, unsigned int clear)
1036 {
1037 struct usb_serial_port *port = tty->driver_data;
1038 struct ti_port *tport = usb_get_serial_port_data(port);
1039 unsigned int mcr;
1040 unsigned long flags;
1041
1042 dbg("%s - port %d", __func__, port->number);
1043
1044 if (tport == NULL)
1045 return -ENODEV;
1046
1047 spin_lock_irqsave(&tport->tp_lock, flags);
1048 mcr = tport->tp_shadow_mcr;
1049
1050 if (set & TIOCM_RTS)
1051 mcr |= TI_MCR_RTS;
1052 if (set & TIOCM_DTR)
1053 mcr |= TI_MCR_DTR;
1054 if (set & TIOCM_LOOP)
1055 mcr |= TI_MCR_LOOP;
1056
1057 if (clear & TIOCM_RTS)
1058 mcr &= ~TI_MCR_RTS;
1059 if (clear & TIOCM_DTR)
1060 mcr &= ~TI_MCR_DTR;
1061 if (clear & TIOCM_LOOP)
1062 mcr &= ~TI_MCR_LOOP;
1063 spin_unlock_irqrestore(&tport->tp_lock, flags);
1064
1065 return ti_set_mcr(tport, mcr);
1066 }
1067
1068
1069 static void ti_break(struct tty_struct *tty, int break_state)
1070 {
1071 struct usb_serial_port *port = tty->driver_data;
1072 struct ti_port *tport = usb_get_serial_port_data(port);
1073 int status;
1074
1075 dbg("%s - state = %d", __func__, break_state);
1076
1077 if (tport == NULL)
1078 return;
1079
1080 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1081
1082 status = ti_write_byte(tport->tp_tdev,
1083 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1084 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1085
1086 if (status)
1087 dbg("%s - error setting break, %d", __func__, status);
1088 }
1089
1090
1091 static void ti_interrupt_callback(struct urb *urb)
1092 {
1093 struct ti_device *tdev = urb->context;
1094 struct usb_serial_port *port;
1095 struct usb_serial *serial = tdev->td_serial;
1096 struct ti_port *tport;
1097 struct device *dev = &urb->dev->dev;
1098 unsigned char *data = urb->transfer_buffer;
1099 int length = urb->actual_length;
1100 int port_number;
1101 int function;
1102 int status = urb->status;
1103 int retval;
1104 __u8 msr;
1105
1106 dbg("%s", __func__);
1107
1108 switch (status) {
1109 case 0:
1110 break;
1111 case -ECONNRESET:
1112 case -ENOENT:
1113 case -ESHUTDOWN:
1114 dbg("%s - urb shutting down, %d", __func__, status);
1115 tdev->td_urb_error = 1;
1116 return;
1117 default:
1118 dev_err(dev, "%s - nonzero urb status, %d\n",
1119 __func__, status);
1120 tdev->td_urb_error = 1;
1121 goto exit;
1122 }
1123
1124 if (length != 2) {
1125 dbg("%s - bad packet size, %d", __func__, length);
1126 goto exit;
1127 }
1128
1129 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1130 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1131 goto exit;
1132 }
1133
1134 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1135 function = TI_GET_FUNC_FROM_CODE(data[0]);
1136
1137 dbg("%s - port_number %d, function %d, data 0x%02X",
1138 __func__, port_number, function, data[1]);
1139
1140 if (port_number >= serial->num_ports) {
1141 dev_err(dev, "%s - bad port number, %d\n",
1142 __func__, port_number);
1143 goto exit;
1144 }
1145
1146 port = serial->port[port_number];
1147
1148 tport = usb_get_serial_port_data(port);
1149 if (!tport)
1150 goto exit;
1151
1152 switch (function) {
1153 case TI_CODE_DATA_ERROR:
1154 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1155 __func__, port_number, data[1]);
1156 break;
1157
1158 case TI_CODE_MODEM_STATUS:
1159 msr = data[1];
1160 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1161 ti_handle_new_msr(tport, msr);
1162 break;
1163
1164 default:
1165 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1166 __func__, data[1]);
1167 break;
1168 }
1169
1170 exit:
1171 retval = usb_submit_urb(urb, GFP_ATOMIC);
1172 if (retval)
1173 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1174 __func__, retval);
1175 }
1176
1177
1178 static void ti_bulk_in_callback(struct urb *urb)
1179 {
1180 struct ti_port *tport = urb->context;
1181 struct usb_serial_port *port = tport->tp_port;
1182 struct device *dev = &urb->dev->dev;
1183 int status = urb->status;
1184 int retval = 0;
1185 struct tty_struct *tty;
1186
1187 dbg("%s", __func__);
1188
1189 switch (status) {
1190 case 0:
1191 break;
1192 case -ECONNRESET:
1193 case -ENOENT:
1194 case -ESHUTDOWN:
1195 dbg("%s - urb shutting down, %d", __func__, status);
1196 tport->tp_tdev->td_urb_error = 1;
1197 wake_up_interruptible(&tport->tp_write_wait);
1198 return;
1199 default:
1200 dev_err(dev, "%s - nonzero urb status, %d\n",
1201 __func__, status);
1202 tport->tp_tdev->td_urb_error = 1;
1203 wake_up_interruptible(&tport->tp_write_wait);
1204 }
1205
1206 if (status == -EPIPE)
1207 goto exit;
1208
1209 if (status) {
1210 dev_err(dev, "%s - stopping read!\n", __func__);
1211 return;
1212 }
1213
1214 tty = tty_port_tty_get(&port->port);
1215 if (tty) {
1216 if (urb->actual_length) {
1217 usb_serial_debug_data(debug, dev, __func__,
1218 urb->actual_length, urb->transfer_buffer);
1219
1220 if (!tport->tp_is_open)
1221 dbg("%s - port closed, dropping data",
1222 __func__);
1223 else
1224 ti_recv(&urb->dev->dev, tty,
1225 urb->transfer_buffer,
1226 urb->actual_length);
1227 spin_lock(&tport->tp_lock);
1228 tport->tp_icount.rx += urb->actual_length;
1229 spin_unlock(&tport->tp_lock);
1230 }
1231 tty_kref_put(tty);
1232 }
1233
1234 exit:
1235 /* continue to read unless stopping */
1236 spin_lock(&tport->tp_lock);
1237 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
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 __func__, retval);
1246 }
1247
1248
1249 static void ti_bulk_out_callback(struct urb *urb)
1250 {
1251 struct ti_port *tport = 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", __func__, 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", __func__, 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 __func__, 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_insert_flip_string(tty, data, length);
1289 if (cnt < length) {
1290 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1291 __func__, length - cnt);
1292 if (cnt == 0)
1293 break;
1294 }
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 = tty_port_tty_get(&port->port); /* FIXME */
1308 unsigned long flags;
1309
1310
1311 dbg("%s - port %d", __func__, port->number);
1312
1313 spin_lock_irqsave(&tport->tp_lock, flags);
1314
1315 if (tport->tp_write_urb_in_use)
1316 goto unlock;
1317
1318 count = kfifo_out(&tport->write_fifo,
1319 port->write_urb->transfer_buffer,
1320 port->bulk_out_size);
1321
1322 if (count == 0)
1323 goto unlock;
1324
1325 tport->tp_write_urb_in_use = 1;
1326
1327 spin_unlock_irqrestore(&tport->tp_lock, flags);
1328
1329 usb_serial_debug_data(debug, &port->dev, __func__, count,
1330 port->write_urb->transfer_buffer);
1331
1332 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1333 usb_sndbulkpipe(port->serial->dev,
1334 port->bulk_out_endpointAddress),
1335 port->write_urb->transfer_buffer, count,
1336 ti_bulk_out_callback, tport);
1337
1338 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1339 if (result) {
1340 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1341 __func__, result);
1342 tport->tp_write_urb_in_use = 0;
1343 /* TODO: reschedule ti_send */
1344 } else {
1345 spin_lock_irqsave(&tport->tp_lock, flags);
1346 tport->tp_icount.tx += count;
1347 spin_unlock_irqrestore(&tport->tp_lock, flags);
1348 }
1349
1350 /* more room in the buffer for new writes, wakeup */
1351 if (tty)
1352 tty_wakeup(tty);
1353 tty_kref_put(tty);
1354 wake_up_interruptible(&tport->tp_write_wait);
1355 return;
1356 unlock:
1357 spin_unlock_irqrestore(&tport->tp_lock, flags);
1358 tty_kref_put(tty);
1359 return;
1360 }
1361
1362
1363 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1364 {
1365 unsigned long flags;
1366 int status;
1367
1368 status = ti_write_byte(tport->tp_tdev,
1369 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1370 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1371
1372 spin_lock_irqsave(&tport->tp_lock, flags);
1373 if (!status)
1374 tport->tp_shadow_mcr = mcr;
1375 spin_unlock_irqrestore(&tport->tp_lock, flags);
1376
1377 return status;
1378 }
1379
1380
1381 static int ti_get_lsr(struct ti_port *tport)
1382 {
1383 int size, status;
1384 struct ti_device *tdev = tport->tp_tdev;
1385 struct usb_serial_port *port = tport->tp_port;
1386 int port_number = port->number - port->serial->minor;
1387 struct ti_port_status *data;
1388
1389 dbg("%s - port %d", __func__, port->number);
1390
1391 size = sizeof(struct ti_port_status);
1392 data = kmalloc(size, GFP_KERNEL);
1393 if (!data) {
1394 dev_err(&port->dev, "%s - out of memory\n", __func__);
1395 return -ENOMEM;
1396 }
1397
1398 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1399 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1400 if (status) {
1401 dev_err(&port->dev,
1402 "%s - get port status command failed, %d\n",
1403 __func__, status);
1404 goto free_data;
1405 }
1406
1407 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1408
1409 tport->tp_lsr = data->bLSR;
1410
1411 free_data:
1412 kfree(data);
1413 return status;
1414 }
1415
1416
1417 static int ti_get_serial_info(struct ti_port *tport,
1418 struct serial_struct __user *ret_arg)
1419 {
1420 struct usb_serial_port *port = tport->tp_port;
1421 struct serial_struct ret_serial;
1422
1423 if (!ret_arg)
1424 return -EFAULT;
1425
1426 memset(&ret_serial, 0, sizeof(ret_serial));
1427
1428 ret_serial.type = PORT_16550A;
1429 ret_serial.line = port->serial->minor;
1430 ret_serial.port = port->number - port->serial->minor;
1431 ret_serial.flags = tport->tp_flags;
1432 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1433 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1434 ret_serial.closing_wait = tport->tp_closing_wait;
1435
1436 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1437 return -EFAULT;
1438
1439 return 0;
1440 }
1441
1442
1443 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1444 struct serial_struct __user *new_arg)
1445 {
1446 struct serial_struct new_serial;
1447
1448 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1449 return -EFAULT;
1450
1451 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1452 tport->tp_closing_wait = new_serial.closing_wait;
1453
1454 return 0;
1455 }
1456
1457
1458 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1459 {
1460 struct async_icount *icount;
1461 struct tty_struct *tty;
1462 unsigned long flags;
1463
1464 dbg("%s - msr 0x%02X", __func__, msr);
1465
1466 if (msr & TI_MSR_DELTA_MASK) {
1467 spin_lock_irqsave(&tport->tp_lock, flags);
1468 icount = &tport->tp_icount;
1469 if (msr & TI_MSR_DELTA_CTS)
1470 icount->cts++;
1471 if (msr & TI_MSR_DELTA_DSR)
1472 icount->dsr++;
1473 if (msr & TI_MSR_DELTA_CD)
1474 icount->dcd++;
1475 if (msr & TI_MSR_DELTA_RI)
1476 icount->rng++;
1477 wake_up_interruptible(&tport->tp_msr_wait);
1478 spin_unlock_irqrestore(&tport->tp_lock, flags);
1479 }
1480
1481 tport->tp_msr = msr & TI_MSR_MASK;
1482
1483 /* handle CTS flow control */
1484 tty = tty_port_tty_get(&tport->tp_port->port);
1485 if (tty && C_CRTSCTS(tty)) {
1486 if (msr & TI_MSR_CTS) {
1487 tty->hw_stopped = 0;
1488 tty_wakeup(tty);
1489 } else {
1490 tty->hw_stopped = 1;
1491 }
1492 }
1493 tty_kref_put(tty);
1494 }
1495
1496
1497 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1498 {
1499 struct ti_device *tdev = tport->tp_tdev;
1500 struct usb_serial_port *port = tport->tp_port;
1501 wait_queue_t wait;
1502
1503 dbg("%s - port %d", __func__, port->number);
1504
1505 spin_lock_irq(&tport->tp_lock);
1506
1507 /* wait for data to drain from the buffer */
1508 tdev->td_urb_error = 0;
1509 init_waitqueue_entry(&wait, current);
1510 add_wait_queue(&tport->tp_write_wait, &wait);
1511 for (;;) {
1512 set_current_state(TASK_INTERRUPTIBLE);
1513 if (kfifo_len(&tport->write_fifo) == 0
1514 || timeout == 0 || signal_pending(current)
1515 || tdev->td_urb_error
1516 || port->serial->disconnected) /* disconnect */
1517 break;
1518 spin_unlock_irq(&tport->tp_lock);
1519 timeout = schedule_timeout(timeout);
1520 spin_lock_irq(&tport->tp_lock);
1521 }
1522 set_current_state(TASK_RUNNING);
1523 remove_wait_queue(&tport->tp_write_wait, &wait);
1524
1525 /* flush any remaining data in the buffer */
1526 if (flush)
1527 kfifo_reset_out(&tport->write_fifo);
1528
1529 spin_unlock_irq(&tport->tp_lock);
1530
1531 mutex_lock(&port->serial->disc_mutex);
1532 /* wait for data to drain from the device */
1533 /* wait for empty tx register, plus 20 ms */
1534 timeout += jiffies;
1535 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1536 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1537 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1538 && !port->serial->disconnected) {
1539 if (ti_get_lsr(tport))
1540 break;
1541 mutex_unlock(&port->serial->disc_mutex);
1542 msleep_interruptible(20);
1543 mutex_lock(&port->serial->disc_mutex);
1544 }
1545 mutex_unlock(&port->serial->disc_mutex);
1546 }
1547
1548
1549 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1550 {
1551 unsigned long flags;
1552
1553 spin_lock_irqsave(&tport->tp_lock, flags);
1554
1555 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1556 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1557
1558 spin_unlock_irqrestore(&tport->tp_lock, flags);
1559 }
1560
1561
1562 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1563 {
1564 struct urb *urb;
1565 int status = 0;
1566 unsigned long flags;
1567
1568 spin_lock_irqsave(&tport->tp_lock, flags);
1569
1570 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1571 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1572 urb = tport->tp_port->read_urb;
1573 spin_unlock_irqrestore(&tport->tp_lock, flags);
1574 urb->context = tport;
1575 status = usb_submit_urb(urb, GFP_KERNEL);
1576 } else {
1577 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1578 spin_unlock_irqrestore(&tport->tp_lock, flags);
1579 }
1580
1581 return status;
1582 }
1583
1584
1585 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1586 __u16 moduleid, __u16 value, __u8 *data, int size)
1587 {
1588 int status;
1589
1590 status = usb_control_msg(tdev->td_serial->dev,
1591 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1592 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1593 value, moduleid, data, size, 1000);
1594
1595 if (status == size)
1596 status = 0;
1597
1598 if (status > 0)
1599 status = -ECOMM;
1600
1601 return status;
1602 }
1603
1604
1605 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1606 __u16 moduleid, __u16 value, __u8 *data, int size)
1607 {
1608 int status;
1609
1610 status = usb_control_msg(tdev->td_serial->dev,
1611 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1612 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1613 value, moduleid, data, size, 1000);
1614
1615 if (status == size)
1616 status = 0;
1617
1618 if (status > 0)
1619 status = -ECOMM;
1620
1621 return status;
1622 }
1623
1624
1625 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1626 __u8 mask, __u8 byte)
1627 {
1628 int status;
1629 unsigned int size;
1630 struct ti_write_data_bytes *data;
1631 struct device *dev = &tdev->td_serial->dev->dev;
1632
1633 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1634 __func__, addr, mask, byte);
1635
1636 size = sizeof(struct ti_write_data_bytes) + 2;
1637 data = kmalloc(size, GFP_KERNEL);
1638 if (!data) {
1639 dev_err(dev, "%s - out of memory\n", __func__);
1640 return -ENOMEM;
1641 }
1642
1643 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1644 data->bDataType = TI_RW_DATA_BYTE;
1645 data->bDataCounter = 1;
1646 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1647 data->wBaseAddrLo = cpu_to_be16(addr);
1648 data->bData[0] = mask;
1649 data->bData[1] = byte;
1650
1651 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1652 (__u8 *)data, size);
1653
1654 if (status < 0)
1655 dev_err(dev, "%s - failed, %d\n", __func__, status);
1656
1657 kfree(data);
1658
1659 return status;
1660 }
1661
1662 static int ti_do_download(struct usb_device *dev, int pipe,
1663 u8 *buffer, int size)
1664 {
1665 int pos;
1666 u8 cs = 0;
1667 int done;
1668 struct ti_firmware_header *header;
1669 int status = 0;
1670 int len;
1671
1672 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1673 cs = (__u8)(cs + buffer[pos]);
1674
1675 header = (struct ti_firmware_header *)buffer;
1676 header->wLength = cpu_to_le16((__u16)(size
1677 - sizeof(struct ti_firmware_header)));
1678 header->bCheckSum = cs;
1679
1680 dbg("%s - downloading firmware", __func__);
1681 for (pos = 0; pos < size; pos += done) {
1682 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1683 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1684 &done, 1000);
1685 if (status)
1686 break;
1687 }
1688 return status;
1689 }
1690
1691 static int ti_download_firmware(struct ti_device *tdev)
1692 {
1693 int status;
1694 int buffer_size;
1695 __u8 *buffer;
1696 struct usb_device *dev = tdev->td_serial->dev;
1697 unsigned int pipe = usb_sndbulkpipe(dev,
1698 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1699 const struct firmware *fw_p;
1700 char buf[32];
1701
1702 dbg("%s\n", __func__);
1703 /* try ID specific firmware first, then try generic firmware */
1704 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1705 dev->descriptor.idProduct);
1706 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1707 buf[0] = '\0';
1708 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1709 switch (dev->descriptor.idProduct) {
1710 case MTS_CDMA_PRODUCT_ID:
1711 strcpy(buf, "mts_cdma.fw");
1712 break;
1713 case MTS_GSM_PRODUCT_ID:
1714 strcpy(buf, "mts_gsm.fw");
1715 break;
1716 case MTS_EDGE_PRODUCT_ID:
1717 strcpy(buf, "mts_edge.fw");
1718 break;
1719 case MTS_MT9234MU_PRODUCT_ID:
1720 strcpy(buf, "mts_mt9234mu.fw");
1721 break;
1722 case MTS_MT9234ZBA_PRODUCT_ID:
1723 strcpy(buf, "mts_mt9234zba.fw");
1724 break;
1725 case MTS_MT9234ZBAOLD_PRODUCT_ID:
1726 strcpy(buf, "mts_mt9234zba.fw");
1727 break; }
1728 }
1729 if (buf[0] == '\0') {
1730 if (tdev->td_is_3410)
1731 strcpy(buf, "ti_3410.fw");
1732 else
1733 strcpy(buf, "ti_5052.fw");
1734 }
1735 status = request_firmware(&fw_p, buf, &dev->dev);
1736 }
1737 if (status) {
1738 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1739 return -ENOENT;
1740 }
1741 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1742 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1743 release_firmware(fw_p);
1744 return -ENOENT;
1745 }
1746
1747 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1748 buffer = kmalloc(buffer_size, GFP_KERNEL);
1749 if (buffer) {
1750 memcpy(buffer, fw_p->data, fw_p->size);
1751 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1752 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1753 kfree(buffer);
1754 } else {
1755 dbg("%s ENOMEM\n", __func__);
1756 status = -ENOMEM;
1757 }
1758 release_firmware(fw_p);
1759 if (status) {
1760 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1761 __func__, status);
1762 return status;
1763 }
1764
1765 dbg("%s - download successful", __func__);
1766
1767 return 0;
1768 }