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USB: TI 3410/5052 USB Serial Driver: Fix mem leak when firmware is too big.
[zen-stable.git] / drivers / usb / serial / ti_usb_3410_5052.c
blobea8445689c8501f82795a9fe29c95b9fbcd73183
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 int 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[13+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 };
183
184 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
185 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
186 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
187 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
188 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
189 };
190
191 static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
192 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
193 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
194 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
195 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
196 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
197 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
198 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
199 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
200 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
202 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
203 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
204 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
205 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
206 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
207 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
208 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
209 { }
210 };
211
212 static struct usb_driver ti_usb_driver = {
213 .name = "ti_usb_3410_5052",
214 .probe = usb_serial_probe,
215 .disconnect = usb_serial_disconnect,
216 .id_table = ti_id_table_combined,
217 .no_dynamic_id = 1,
218 };
219
220 static struct usb_serial_driver ti_1port_device = {
221 .driver = {
222 .owner = THIS_MODULE,
223 .name = "ti_usb_3410_5052_1",
224 },
225 .description = "TI USB 3410 1 port adapter",
226 .usb_driver = &ti_usb_driver,
227 .id_table = ti_id_table_3410,
228 .num_ports = 1,
229 .attach = ti_startup,
230 .release = ti_release,
231 .open = ti_open,
232 .close = ti_close,
233 .write = ti_write,
234 .write_room = ti_write_room,
235 .chars_in_buffer = ti_chars_in_buffer,
236 .throttle = ti_throttle,
237 .unthrottle = ti_unthrottle,
238 .ioctl = ti_ioctl,
239 .set_termios = ti_set_termios,
240 .tiocmget = ti_tiocmget,
241 .tiocmset = ti_tiocmset,
242 .get_icount = ti_get_icount,
243 .break_ctl = ti_break,
244 .read_int_callback = ti_interrupt_callback,
245 .read_bulk_callback = ti_bulk_in_callback,
246 .write_bulk_callback = ti_bulk_out_callback,
247 };
248
249 static struct usb_serial_driver ti_2port_device = {
250 .driver = {
251 .owner = THIS_MODULE,
252 .name = "ti_usb_3410_5052_2",
253 },
254 .description = "TI USB 5052 2 port adapter",
255 .usb_driver = &ti_usb_driver,
256 .id_table = ti_id_table_5052,
257 .num_ports = 2,
258 .attach = ti_startup,
259 .release = ti_release,
260 .open = ti_open,
261 .close = ti_close,
262 .write = ti_write,
263 .write_room = ti_write_room,
264 .chars_in_buffer = ti_chars_in_buffer,
265 .throttle = ti_throttle,
266 .unthrottle = ti_unthrottle,
267 .ioctl = ti_ioctl,
268 .set_termios = ti_set_termios,
269 .tiocmget = ti_tiocmget,
270 .tiocmset = ti_tiocmset,
271 .get_icount = ti_get_icount,
272 .break_ctl = ti_break,
273 .read_int_callback = ti_interrupt_callback,
274 .read_bulk_callback = ti_bulk_in_callback,
275 .write_bulk_callback = ti_bulk_out_callback,
276 };
277
278
279 /* Module */
280
281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
283 MODULE_VERSION(TI_DRIVER_VERSION);
284 MODULE_LICENSE("GPL");
285
286 MODULE_FIRMWARE("ti_3410.fw");
287 MODULE_FIRMWARE("ti_5052.fw");
288 MODULE_FIRMWARE("mts_cdma.fw");
289 MODULE_FIRMWARE("mts_gsm.fw");
290 MODULE_FIRMWARE("mts_edge.fw");
291 MODULE_FIRMWARE("mts_mt9234mu.fw");
292 MODULE_FIRMWARE("mts_mt9234zba.fw");
293
294 module_param(debug, bool, S_IRUGO | S_IWUSR);
295 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
296
297 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
298 MODULE_PARM_DESC(closing_wait,
299 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
300
301 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
302 MODULE_PARM_DESC(vendor_3410,
303 "Vendor ids for 3410 based devices, 1-5 short integers");
304 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
305 MODULE_PARM_DESC(product_3410,
306 "Product ids for 3410 based devices, 1-5 short integers");
307 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
308 MODULE_PARM_DESC(vendor_5052,
309 "Vendor ids for 5052 based devices, 1-5 short integers");
310 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
311 MODULE_PARM_DESC(product_5052,
312 "Product ids for 5052 based devices, 1-5 short integers");
313
314 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
315
316
317 /* Functions */
318
319 static int __init ti_init(void)
320 {
321 int i, j, c;
322 int ret;
323
324 /* insert extra vendor and product ids */
325 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
326 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
327 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
328 ti_id_table_3410[j].idVendor = vendor_3410[i];
329 ti_id_table_3410[j].idProduct = product_3410[i];
330 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
331 ti_id_table_combined[c].idVendor = vendor_3410[i];
332 ti_id_table_combined[c].idProduct = product_3410[i];
333 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
334 }
335 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
336 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
337 ti_id_table_5052[j].idVendor = vendor_5052[i];
338 ti_id_table_5052[j].idProduct = product_5052[i];
339 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
340 ti_id_table_combined[c].idVendor = vendor_5052[i];
341 ti_id_table_combined[c].idProduct = product_5052[i];
342 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
343 }
344
345 ret = usb_serial_register(&ti_1port_device);
346 if (ret)
347 goto failed_1port;
348 ret = usb_serial_register(&ti_2port_device);
349 if (ret)
350 goto failed_2port;
351
352 ret = usb_register(&ti_usb_driver);
353 if (ret)
354 goto failed_usb;
355
356 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
357 TI_DRIVER_DESC "\n");
358
359 return 0;
360
361 failed_usb:
362 usb_serial_deregister(&ti_2port_device);
363 failed_2port:
364 usb_serial_deregister(&ti_1port_device);
365 failed_1port:
366 return ret;
367 }
368
369
370 static void __exit ti_exit(void)
371 {
372 usb_deregister(&ti_usb_driver);
373 usb_serial_deregister(&ti_1port_device);
374 usb_serial_deregister(&ti_2port_device);
375 }
376
377
378 module_init(ti_init);
379 module_exit(ti_exit);
380
381
382 static int ti_startup(struct usb_serial *serial)
383 {
384 struct ti_device *tdev;
385 struct ti_port *tport;
386 struct usb_device *dev = serial->dev;
387 int status;
388 int i;
389
390
391 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
392 __func__, le16_to_cpu(dev->descriptor.idProduct),
393 dev->descriptor.bNumConfigurations,
394 dev->actconfig->desc.bConfigurationValue);
395
396 /* create device structure */
397 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
398 if (tdev == NULL) {
399 dev_err(&dev->dev, "%s - out of memory\n", __func__);
400 return -ENOMEM;
401 }
402 mutex_init(&tdev->td_open_close_lock);
403 tdev->td_serial = serial;
404 usb_set_serial_data(serial, tdev);
405
406 /* determine device type */
407 if (usb_match_id(serial->interface, ti_id_table_3410))
408 tdev->td_is_3410 = 1;
409 dbg("%s - device type is %s", __func__,
410 tdev->td_is_3410 ? "3410" : "5052");
411
412 /* if we have only 1 configuration, download firmware */
413 if (dev->descriptor.bNumConfigurations == 1) {
414 if ((status = ti_download_firmware(tdev)) != 0)
415 goto free_tdev;
416
417 /* 3410 must be reset, 5052 resets itself */
418 if (tdev->td_is_3410) {
419 msleep_interruptible(100);
420 usb_reset_device(dev);
421 }
422
423 status = -ENODEV;
424 goto free_tdev;
425 }
426
427 /* the second configuration must be set */
428 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
429 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
430 status = status ? status : -ENODEV;
431 goto free_tdev;
432 }
433
434 /* set up port structures */
435 for (i = 0; i < serial->num_ports; ++i) {
436 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
437 if (tport == NULL) {
438 dev_err(&dev->dev, "%s - out of memory\n", __func__);
439 status = -ENOMEM;
440 goto free_tports;
441 }
442 spin_lock_init(&tport->tp_lock);
443 tport->tp_uart_base_addr = (i == 0 ?
444 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
445 tport->tp_closing_wait = closing_wait;
446 init_waitqueue_head(&tport->tp_msr_wait);
447 init_waitqueue_head(&tport->tp_write_wait);
448 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
449 GFP_KERNEL)) {
450 dev_err(&dev->dev, "%s - out of memory\n", __func__);
451 kfree(tport);
452 status = -ENOMEM;
453 goto free_tports;
454 }
455 tport->tp_port = serial->port[i];
456 tport->tp_tdev = tdev;
457 usb_set_serial_port_data(serial->port[i], tport);
458 tport->tp_uart_mode = 0; /* default is RS232 */
459 }
460
461 return 0;
462
463 free_tports:
464 for (--i; i >= 0; --i) {
465 tport = usb_get_serial_port_data(serial->port[i]);
466 kfifo_free(&tport->write_fifo);
467 kfree(tport);
468 usb_set_serial_port_data(serial->port[i], NULL);
469 }
470 free_tdev:
471 kfree(tdev);
472 usb_set_serial_data(serial, NULL);
473 return status;
474 }
475
476
477 static void ti_release(struct usb_serial *serial)
478 {
479 int i;
480 struct ti_device *tdev = usb_get_serial_data(serial);
481 struct ti_port *tport;
482
483 dbg("%s", __func__);
484
485 for (i = 0; i < serial->num_ports; ++i) {
486 tport = usb_get_serial_port_data(serial->port[i]);
487 if (tport) {
488 kfifo_free(&tport->write_fifo);
489 kfree(tport);
490 }
491 }
492
493 kfree(tdev);
494 }
495
496
497 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
498 {
499 struct ti_port *tport = usb_get_serial_port_data(port);
500 struct ti_device *tdev;
501 struct usb_device *dev;
502 struct urb *urb;
503 int port_number;
504 int status;
505 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
506 TI_PIPE_TIMEOUT_ENABLE |
507 (TI_TRANSFER_TIMEOUT << 2));
508
509 dbg("%s - port %d", __func__, port->number);
510
511 if (tport == NULL)
512 return -ENODEV;
513
514 dev = port->serial->dev;
515 tdev = tport->tp_tdev;
516
517 /* only one open on any port on a device at a time */
518 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
519 return -ERESTARTSYS;
520
521 port_number = port->number - port->serial->minor;
522
523 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
524
525 tport->tp_msr = 0;
526 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
527
528 /* start interrupt urb the first time a port is opened on this device */
529 if (tdev->td_open_port_count == 0) {
530 dbg("%s - start interrupt in urb", __func__);
531 urb = tdev->td_serial->port[0]->interrupt_in_urb;
532 if (!urb) {
533 dev_err(&port->dev, "%s - no interrupt urb\n",
534 __func__);
535 status = -EINVAL;
536 goto release_lock;
537 }
538 urb->complete = ti_interrupt_callback;
539 urb->context = tdev;
540 urb->dev = dev;
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->complete = ti_bulk_in_callback;
623 urb->context = tport;
624 urb->dev = dev;
625 status = usb_submit_urb(urb, GFP_KERNEL);
626 if (status) {
627 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
628 __func__, status);
629 goto unlink_int_urb;
630 }
631
632 tport->tp_is_open = 1;
633 ++tdev->td_open_port_count;
634
635 goto release_lock;
636
637 unlink_int_urb:
638 if (tdev->td_open_port_count == 0)
639 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
640 release_lock:
641 mutex_unlock(&tdev->td_open_close_lock);
642 dbg("%s - exit %d", __func__, status);
643 return status;
644 }
645
646
647 static void ti_close(struct usb_serial_port *port)
648 {
649 struct ti_device *tdev;
650 struct ti_port *tport;
651 int port_number;
652 int status;
653 int do_unlock;
654
655 dbg("%s - port %d", __func__, port->number);
656
657 tdev = usb_get_serial_data(port->serial);
658 tport = usb_get_serial_port_data(port);
659 if (tdev == NULL || tport == NULL)
660 return;
661
662 tport->tp_is_open = 0;
663
664 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
665
666 usb_kill_urb(port->read_urb);
667 usb_kill_urb(port->write_urb);
668 tport->tp_write_urb_in_use = 0;
669
670 port_number = port->number - port->serial->minor;
671
672 dbg("%s - sending TI_CLOSE_PORT", __func__);
673 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
674 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
675 if (status)
676 dev_err(&port->dev,
677 "%s - cannot send close port command, %d\n"
678 , __func__, status);
679
680 /* if mutex_lock is interrupted, continue anyway */
681 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
682 --tport->tp_tdev->td_open_port_count;
683 if (tport->tp_tdev->td_open_port_count <= 0) {
684 /* last port is closed, shut down interrupt urb */
685 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
686 tport->tp_tdev->td_open_port_count = 0;
687 }
688 if (do_unlock)
689 mutex_unlock(&tdev->td_open_close_lock);
690
691 dbg("%s - exit", __func__);
692 }
693
694
695 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
696 const unsigned char *data, int count)
697 {
698 struct ti_port *tport = usb_get_serial_port_data(port);
699
700 dbg("%s - port %d", __func__, port->number);
701
702 if (count == 0) {
703 dbg("%s - write request of 0 bytes", __func__);
704 return 0;
705 }
706
707 if (tport == NULL || !tport->tp_is_open)
708 return -ENODEV;
709
710 count = kfifo_in_locked(&tport->write_fifo, data, count,
711 &tport->tp_lock);
712 ti_send(tport);
713
714 return count;
715 }
716
717
718 static int ti_write_room(struct tty_struct *tty)
719 {
720 struct usb_serial_port *port = tty->driver_data;
721 struct ti_port *tport = usb_get_serial_port_data(port);
722 int room = 0;
723 unsigned long flags;
724
725 dbg("%s - port %d", __func__, port->number);
726
727 if (tport == NULL)
728 return 0;
729
730 spin_lock_irqsave(&tport->tp_lock, flags);
731 room = kfifo_avail(&tport->write_fifo);
732 spin_unlock_irqrestore(&tport->tp_lock, flags);
733
734 dbg("%s - returns %d", __func__, room);
735 return room;
736 }
737
738
739 static int ti_chars_in_buffer(struct tty_struct *tty)
740 {
741 struct usb_serial_port *port = tty->driver_data;
742 struct ti_port *tport = usb_get_serial_port_data(port);
743 int chars = 0;
744 unsigned long flags;
745
746 dbg("%s - port %d", __func__, port->number);
747
748 if (tport == NULL)
749 return 0;
750
751 spin_lock_irqsave(&tport->tp_lock, flags);
752 chars = kfifo_len(&tport->write_fifo);
753 spin_unlock_irqrestore(&tport->tp_lock, flags);
754
755 dbg("%s - returns %d", __func__, chars);
756 return chars;
757 }
758
759
760 static void ti_throttle(struct tty_struct *tty)
761 {
762 struct usb_serial_port *port = tty->driver_data;
763 struct ti_port *tport = usb_get_serial_port_data(port);
764
765 dbg("%s - port %d", __func__, port->number);
766
767 if (tport == NULL)
768 return;
769
770 if (I_IXOFF(tty) || C_CRTSCTS(tty))
771 ti_stop_read(tport, tty);
772
773 }
774
775
776 static void ti_unthrottle(struct tty_struct *tty)
777 {
778 struct usb_serial_port *port = tty->driver_data;
779 struct ti_port *tport = usb_get_serial_port_data(port);
780 int status;
781
782 dbg("%s - port %d", __func__, port->number);
783
784 if (tport == NULL)
785 return;
786
787 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
788 status = ti_restart_read(tport, tty);
789 if (status)
790 dev_err(&port->dev, "%s - cannot restart read, %d\n",
791 __func__, status);
792 }
793 }
794
795 static int ti_get_icount(struct tty_struct *tty,
796 struct serial_icounter_struct *icount)
797 {
798 struct usb_serial_port *port = tty->driver_data;
799 struct ti_port *tport = usb_get_serial_port_data(port);
800 struct async_icount cnow = tport->tp_icount;
801
802 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
803 __func__, port->number,
804 cnow.rx, cnow.tx);
805
806 icount->cts = cnow.cts;
807 icount->dsr = cnow.dsr;
808 icount->rng = cnow.rng;
809 icount->dcd = cnow.dcd;
810 icount->rx = cnow.rx;
811 icount->tx = cnow.tx;
812 icount->frame = cnow.frame;
813 icount->overrun = cnow.overrun;
814 icount->parity = cnow.parity;
815 icount->brk = cnow.brk;
816 icount->buf_overrun = cnow.buf_overrun;
817
818 return 0;
819 }
820
821 static int ti_ioctl(struct tty_struct *tty,
822 unsigned int cmd, unsigned long arg)
823 {
824 struct usb_serial_port *port = tty->driver_data;
825 struct ti_port *tport = usb_get_serial_port_data(port);
826 struct async_icount cnow;
827 struct async_icount cprev;
828
829 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
830
831 if (tport == NULL)
832 return -ENODEV;
833
834 switch (cmd) {
835 case TIOCGSERIAL:
836 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
837 return ti_get_serial_info(tport,
838 (struct serial_struct __user *)arg);
839 case TIOCSSERIAL:
840 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
841 return ti_set_serial_info(tty, tport,
842 (struct serial_struct __user *)arg);
843 case TIOCMIWAIT:
844 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
845 cprev = tport->tp_icount;
846 while (1) {
847 interruptible_sleep_on(&tport->tp_msr_wait);
848 if (signal_pending(current))
849 return -ERESTARTSYS;
850 cnow = tport->tp_icount;
851 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
852 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
853 return -EIO; /* no change => error */
854 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
855 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
856 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
857 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
858 return 0;
859 cprev = cnow;
860 }
861 break;
862 }
863 return -ENOIOCTLCMD;
864 }
865
866
867 static void ti_set_termios(struct tty_struct *tty,
868 struct usb_serial_port *port, struct ktermios *old_termios)
869 {
870 struct ti_port *tport = usb_get_serial_port_data(port);
871 struct ti_uart_config *config;
872 tcflag_t cflag, iflag;
873 int baud;
874 int status;
875 int port_number = port->number - port->serial->minor;
876 unsigned int mcr;
877
878 dbg("%s - port %d", __func__, port->number);
879
880 cflag = tty->termios->c_cflag;
881 iflag = tty->termios->c_iflag;
882
883 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
884 dbg("%s - old clfag %08x, old iflag %08x", __func__,
885 old_termios->c_cflag, old_termios->c_iflag);
886
887 if (tport == NULL)
888 return;
889
890 config = kmalloc(sizeof(*config), GFP_KERNEL);
891 if (!config) {
892 dev_err(&port->dev, "%s - out of memory\n", __func__);
893 return;
894 }
895
896 config->wFlags = 0;
897
898 /* these flags must be set */
899 config->wFlags |= TI_UART_ENABLE_MS_INTS;
900 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
901 config->bUartMode = (__u8)(tport->tp_uart_mode);
902
903 switch (cflag & CSIZE) {
904 case CS5:
905 config->bDataBits = TI_UART_5_DATA_BITS;
906 break;
907 case CS6:
908 config->bDataBits = TI_UART_6_DATA_BITS;
909 break;
910 case CS7:
911 config->bDataBits = TI_UART_7_DATA_BITS;
912 break;
913 default:
914 case CS8:
915 config->bDataBits = TI_UART_8_DATA_BITS;
916 break;
917 }
918
919 /* CMSPAR isn't supported by this driver */
920 tty->termios->c_cflag &= ~CMSPAR;
921
922 if (cflag & PARENB) {
923 if (cflag & PARODD) {
924 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
925 config->bParity = TI_UART_ODD_PARITY;
926 } else {
927 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
928 config->bParity = TI_UART_EVEN_PARITY;
929 }
930 } else {
931 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
932 config->bParity = TI_UART_NO_PARITY;
933 }
934
935 if (cflag & CSTOPB)
936 config->bStopBits = TI_UART_2_STOP_BITS;
937 else
938 config->bStopBits = TI_UART_1_STOP_BITS;
939
940 if (cflag & CRTSCTS) {
941 /* RTS flow control must be off to drop RTS for baud rate B0 */
942 if ((cflag & CBAUD) != B0)
943 config->wFlags |= TI_UART_ENABLE_RTS_IN;
944 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
945 } else {
946 tty->hw_stopped = 0;
947 ti_restart_read(tport, tty);
948 }
949
950 if (I_IXOFF(tty) || I_IXON(tty)) {
951 config->cXon = START_CHAR(tty);
952 config->cXoff = STOP_CHAR(tty);
953
954 if (I_IXOFF(tty))
955 config->wFlags |= TI_UART_ENABLE_X_IN;
956 else
957 ti_restart_read(tport, tty);
958
959 if (I_IXON(tty))
960 config->wFlags |= TI_UART_ENABLE_X_OUT;
961 }
962
963 baud = tty_get_baud_rate(tty);
964 if (!baud)
965 baud = 9600;
966 if (tport->tp_tdev->td_is_3410)
967 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
968 else
969 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
970
971 /* FIXME: Should calculate resulting baud here and report it back */
972 if ((cflag & CBAUD) != B0)
973 tty_encode_baud_rate(tty, baud, baud);
974
975 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
976 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
977
978 cpu_to_be16s(&config->wBaudRate);
979 cpu_to_be16s(&config->wFlags);
980
981 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
982 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
983 sizeof(*config));
984 if (status)
985 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
986 __func__, port_number, status);
987
988 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
989 mcr = tport->tp_shadow_mcr;
990 /* if baud rate is B0, clear RTS and DTR */
991 if ((cflag & CBAUD) == B0)
992 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
993 status = ti_set_mcr(tport, mcr);
994 if (status)
995 dev_err(&port->dev,
996 "%s - cannot set modem control on port %d, %d\n",
997 __func__, port_number, status);
998
999 kfree(config);
1000 }
1001
1002
1003 static int ti_tiocmget(struct tty_struct *tty)
1004 {
1005 struct usb_serial_port *port = tty->driver_data;
1006 struct ti_port *tport = usb_get_serial_port_data(port);
1007 unsigned int result;
1008 unsigned int msr;
1009 unsigned int mcr;
1010 unsigned long flags;
1011
1012 dbg("%s - port %d", __func__, port->number);
1013
1014 if (tport == NULL)
1015 return -ENODEV;
1016
1017 spin_lock_irqsave(&tport->tp_lock, flags);
1018 msr = tport->tp_msr;
1019 mcr = tport->tp_shadow_mcr;
1020 spin_unlock_irqrestore(&tport->tp_lock, flags);
1021
1022 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1023 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1024 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1025 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1026 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1027 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1028 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1029
1030 dbg("%s - 0x%04X", __func__, result);
1031
1032 return result;
1033 }
1034
1035
1036 static int ti_tiocmset(struct tty_struct *tty,
1037 unsigned int set, unsigned int clear)
1038 {
1039 struct usb_serial_port *port = tty->driver_data;
1040 struct ti_port *tport = usb_get_serial_port_data(port);
1041 unsigned int mcr;
1042 unsigned long flags;
1043
1044 dbg("%s - port %d", __func__, port->number);
1045
1046 if (tport == NULL)
1047 return -ENODEV;
1048
1049 spin_lock_irqsave(&tport->tp_lock, flags);
1050 mcr = tport->tp_shadow_mcr;
1051
1052 if (set & TIOCM_RTS)
1053 mcr |= TI_MCR_RTS;
1054 if (set & TIOCM_DTR)
1055 mcr |= TI_MCR_DTR;
1056 if (set & TIOCM_LOOP)
1057 mcr |= TI_MCR_LOOP;
1058
1059 if (clear & TIOCM_RTS)
1060 mcr &= ~TI_MCR_RTS;
1061 if (clear & TIOCM_DTR)
1062 mcr &= ~TI_MCR_DTR;
1063 if (clear & TIOCM_LOOP)
1064 mcr &= ~TI_MCR_LOOP;
1065 spin_unlock_irqrestore(&tport->tp_lock, flags);
1066
1067 return ti_set_mcr(tport, mcr);
1068 }
1069
1070
1071 static void ti_break(struct tty_struct *tty, int break_state)
1072 {
1073 struct usb_serial_port *port = tty->driver_data;
1074 struct ti_port *tport = usb_get_serial_port_data(port);
1075 int status;
1076
1077 dbg("%s - state = %d", __func__, break_state);
1078
1079 if (tport == NULL)
1080 return;
1081
1082 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1083
1084 status = ti_write_byte(tport->tp_tdev,
1085 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1086 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1087
1088 if (status)
1089 dbg("%s - error setting break, %d", __func__, status);
1090 }
1091
1092
1093 static void ti_interrupt_callback(struct urb *urb)
1094 {
1095 struct ti_device *tdev = urb->context;
1096 struct usb_serial_port *port;
1097 struct usb_serial *serial = tdev->td_serial;
1098 struct ti_port *tport;
1099 struct device *dev = &urb->dev->dev;
1100 unsigned char *data = urb->transfer_buffer;
1101 int length = urb->actual_length;
1102 int port_number;
1103 int function;
1104 int status = urb->status;
1105 int retval;
1106 __u8 msr;
1107
1108 dbg("%s", __func__);
1109
1110 switch (status) {
1111 case 0:
1112 break;
1113 case -ECONNRESET:
1114 case -ENOENT:
1115 case -ESHUTDOWN:
1116 dbg("%s - urb shutting down, %d", __func__, status);
1117 tdev->td_urb_error = 1;
1118 return;
1119 default:
1120 dev_err(dev, "%s - nonzero urb status, %d\n",
1121 __func__, status);
1122 tdev->td_urb_error = 1;
1123 goto exit;
1124 }
1125
1126 if (length != 2) {
1127 dbg("%s - bad packet size, %d", __func__, length);
1128 goto exit;
1129 }
1130
1131 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1132 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1133 goto exit;
1134 }
1135
1136 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1137 function = TI_GET_FUNC_FROM_CODE(data[0]);
1138
1139 dbg("%s - port_number %d, function %d, data 0x%02X",
1140 __func__, port_number, function, data[1]);
1141
1142 if (port_number >= serial->num_ports) {
1143 dev_err(dev, "%s - bad port number, %d\n",
1144 __func__, port_number);
1145 goto exit;
1146 }
1147
1148 port = serial->port[port_number];
1149
1150 tport = usb_get_serial_port_data(port);
1151 if (!tport)
1152 goto exit;
1153
1154 switch (function) {
1155 case TI_CODE_DATA_ERROR:
1156 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1157 __func__, port_number, data[1]);
1158 break;
1159
1160 case TI_CODE_MODEM_STATUS:
1161 msr = data[1];
1162 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1163 ti_handle_new_msr(tport, msr);
1164 break;
1165
1166 default:
1167 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1168 __func__, data[1]);
1169 break;
1170 }
1171
1172 exit:
1173 retval = usb_submit_urb(urb, GFP_ATOMIC);
1174 if (retval)
1175 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1176 __func__, retval);
1177 }
1178
1179
1180 static void ti_bulk_in_callback(struct urb *urb)
1181 {
1182 struct ti_port *tport = urb->context;
1183 struct usb_serial_port *port = tport->tp_port;
1184 struct device *dev = &urb->dev->dev;
1185 int status = urb->status;
1186 int retval = 0;
1187 struct tty_struct *tty;
1188
1189 dbg("%s", __func__);
1190
1191 switch (status) {
1192 case 0:
1193 break;
1194 case -ECONNRESET:
1195 case -ENOENT:
1196 case -ESHUTDOWN:
1197 dbg("%s - urb shutting down, %d", __func__, status);
1198 tport->tp_tdev->td_urb_error = 1;
1199 wake_up_interruptible(&tport->tp_write_wait);
1200 return;
1201 default:
1202 dev_err(dev, "%s - nonzero urb status, %d\n",
1203 __func__, status);
1204 tport->tp_tdev->td_urb_error = 1;
1205 wake_up_interruptible(&tport->tp_write_wait);
1206 }
1207
1208 if (status == -EPIPE)
1209 goto exit;
1210
1211 if (status) {
1212 dev_err(dev, "%s - stopping read!\n", __func__);
1213 return;
1214 }
1215
1216 tty = tty_port_tty_get(&port->port);
1217 if (tty) {
1218 if (urb->actual_length) {
1219 usb_serial_debug_data(debug, dev, __func__,
1220 urb->actual_length, urb->transfer_buffer);
1221
1222 if (!tport->tp_is_open)
1223 dbg("%s - port closed, dropping data",
1224 __func__);
1225 else
1226 ti_recv(&urb->dev->dev, tty,
1227 urb->transfer_buffer,
1228 urb->actual_length);
1229 spin_lock(&tport->tp_lock);
1230 tport->tp_icount.rx += urb->actual_length;
1231 spin_unlock(&tport->tp_lock);
1232 }
1233 tty_kref_put(tty);
1234 }
1235
1236 exit:
1237 /* continue to read unless stopping */
1238 spin_lock(&tport->tp_lock);
1239 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1240 urb->dev = port->serial->dev;
1241 retval = usb_submit_urb(urb, GFP_ATOMIC);
1242 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1243 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1244 }
1245 spin_unlock(&tport->tp_lock);
1246 if (retval)
1247 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1248 __func__, retval);
1249 }
1250
1251
1252 static void ti_bulk_out_callback(struct urb *urb)
1253 {
1254 struct ti_port *tport = urb->context;
1255 struct usb_serial_port *port = tport->tp_port;
1256 struct device *dev = &urb->dev->dev;
1257 int status = urb->status;
1258
1259 dbg("%s - port %d", __func__, port->number);
1260
1261 tport->tp_write_urb_in_use = 0;
1262
1263 switch (status) {
1264 case 0:
1265 break;
1266 case -ECONNRESET:
1267 case -ENOENT:
1268 case -ESHUTDOWN:
1269 dbg("%s - urb shutting down, %d", __func__, status);
1270 tport->tp_tdev->td_urb_error = 1;
1271 wake_up_interruptible(&tport->tp_write_wait);
1272 return;
1273 default:
1274 dev_err(dev, "%s - nonzero urb status, %d\n",
1275 __func__, status);
1276 tport->tp_tdev->td_urb_error = 1;
1277 wake_up_interruptible(&tport->tp_write_wait);
1278 }
1279
1280 /* send any buffered data */
1281 ti_send(tport);
1282 }
1283
1284
1285 static void ti_recv(struct device *dev, struct tty_struct *tty,
1286 unsigned char *data, int length)
1287 {
1288 int cnt;
1289
1290 do {
1291 cnt = tty_insert_flip_string(tty, data, length);
1292 if (cnt < length) {
1293 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1294 __func__, length - cnt);
1295 if (cnt == 0)
1296 break;
1297 }
1298 tty_flip_buffer_push(tty);
1299 data += cnt;
1300 length -= cnt;
1301 } while (length > 0);
1302
1303 }
1304
1305
1306 static void ti_send(struct ti_port *tport)
1307 {
1308 int count, result;
1309 struct usb_serial_port *port = tport->tp_port;
1310 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1311 unsigned long flags;
1312
1313
1314 dbg("%s - port %d", __func__, port->number);
1315
1316 spin_lock_irqsave(&tport->tp_lock, flags);
1317
1318 if (tport->tp_write_urb_in_use)
1319 goto unlock;
1320
1321 count = kfifo_out(&tport->write_fifo,
1322 port->write_urb->transfer_buffer,
1323 port->bulk_out_size);
1324
1325 if (count == 0)
1326 goto unlock;
1327
1328 tport->tp_write_urb_in_use = 1;
1329
1330 spin_unlock_irqrestore(&tport->tp_lock, flags);
1331
1332 usb_serial_debug_data(debug, &port->dev, __func__, count,
1333 port->write_urb->transfer_buffer);
1334
1335 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1336 usb_sndbulkpipe(port->serial->dev,
1337 port->bulk_out_endpointAddress),
1338 port->write_urb->transfer_buffer, count,
1339 ti_bulk_out_callback, tport);
1340
1341 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1342 if (result) {
1343 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1344 __func__, result);
1345 tport->tp_write_urb_in_use = 0;
1346 /* TODO: reschedule ti_send */
1347 } else {
1348 spin_lock_irqsave(&tport->tp_lock, flags);
1349 tport->tp_icount.tx += count;
1350 spin_unlock_irqrestore(&tport->tp_lock, flags);
1351 }
1352
1353 /* more room in the buffer for new writes, wakeup */
1354 if (tty)
1355 tty_wakeup(tty);
1356 tty_kref_put(tty);
1357 wake_up_interruptible(&tport->tp_write_wait);
1358 return;
1359 unlock:
1360 spin_unlock_irqrestore(&tport->tp_lock, flags);
1361 tty_kref_put(tty);
1362 return;
1363 }
1364
1365
1366 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1367 {
1368 unsigned long flags;
1369 int status;
1370
1371 status = ti_write_byte(tport->tp_tdev,
1372 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1373 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1374
1375 spin_lock_irqsave(&tport->tp_lock, flags);
1376 if (!status)
1377 tport->tp_shadow_mcr = mcr;
1378 spin_unlock_irqrestore(&tport->tp_lock, flags);
1379
1380 return status;
1381 }
1382
1383
1384 static int ti_get_lsr(struct ti_port *tport)
1385 {
1386 int size, status;
1387 struct ti_device *tdev = tport->tp_tdev;
1388 struct usb_serial_port *port = tport->tp_port;
1389 int port_number = port->number - port->serial->minor;
1390 struct ti_port_status *data;
1391
1392 dbg("%s - port %d", __func__, port->number);
1393
1394 size = sizeof(struct ti_port_status);
1395 data = kmalloc(size, GFP_KERNEL);
1396 if (!data) {
1397 dev_err(&port->dev, "%s - out of memory\n", __func__);
1398 return -ENOMEM;
1399 }
1400
1401 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1402 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1403 if (status) {
1404 dev_err(&port->dev,
1405 "%s - get port status command failed, %d\n",
1406 __func__, status);
1407 goto free_data;
1408 }
1409
1410 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1411
1412 tport->tp_lsr = data->bLSR;
1413
1414 free_data:
1415 kfree(data);
1416 return status;
1417 }
1418
1419
1420 static int ti_get_serial_info(struct ti_port *tport,
1421 struct serial_struct __user *ret_arg)
1422 {
1423 struct usb_serial_port *port = tport->tp_port;
1424 struct serial_struct ret_serial;
1425
1426 if (!ret_arg)
1427 return -EFAULT;
1428
1429 memset(&ret_serial, 0, sizeof(ret_serial));
1430
1431 ret_serial.type = PORT_16550A;
1432 ret_serial.line = port->serial->minor;
1433 ret_serial.port = port->number - port->serial->minor;
1434 ret_serial.flags = tport->tp_flags;
1435 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1436 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1437 ret_serial.closing_wait = tport->tp_closing_wait;
1438
1439 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1440 return -EFAULT;
1441
1442 return 0;
1443 }
1444
1445
1446 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1447 struct serial_struct __user *new_arg)
1448 {
1449 struct serial_struct new_serial;
1450
1451 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1452 return -EFAULT;
1453
1454 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1455 tport->tp_closing_wait = new_serial.closing_wait;
1456
1457 return 0;
1458 }
1459
1460
1461 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1462 {
1463 struct async_icount *icount;
1464 struct tty_struct *tty;
1465 unsigned long flags;
1466
1467 dbg("%s - msr 0x%02X", __func__, msr);
1468
1469 if (msr & TI_MSR_DELTA_MASK) {
1470 spin_lock_irqsave(&tport->tp_lock, flags);
1471 icount = &tport->tp_icount;
1472 if (msr & TI_MSR_DELTA_CTS)
1473 icount->cts++;
1474 if (msr & TI_MSR_DELTA_DSR)
1475 icount->dsr++;
1476 if (msr & TI_MSR_DELTA_CD)
1477 icount->dcd++;
1478 if (msr & TI_MSR_DELTA_RI)
1479 icount->rng++;
1480 wake_up_interruptible(&tport->tp_msr_wait);
1481 spin_unlock_irqrestore(&tport->tp_lock, flags);
1482 }
1483
1484 tport->tp_msr = msr & TI_MSR_MASK;
1485
1486 /* handle CTS flow control */
1487 tty = tty_port_tty_get(&tport->tp_port->port);
1488 if (tty && C_CRTSCTS(tty)) {
1489 if (msr & TI_MSR_CTS) {
1490 tty->hw_stopped = 0;
1491 tty_wakeup(tty);
1492 } else {
1493 tty->hw_stopped = 1;
1494 }
1495 }
1496 tty_kref_put(tty);
1497 }
1498
1499
1500 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1501 {
1502 struct ti_device *tdev = tport->tp_tdev;
1503 struct usb_serial_port *port = tport->tp_port;
1504 wait_queue_t wait;
1505
1506 dbg("%s - port %d", __func__, port->number);
1507
1508 spin_lock_irq(&tport->tp_lock);
1509
1510 /* wait for data to drain from the buffer */
1511 tdev->td_urb_error = 0;
1512 init_waitqueue_entry(&wait, current);
1513 add_wait_queue(&tport->tp_write_wait, &wait);
1514 for (;;) {
1515 set_current_state(TASK_INTERRUPTIBLE);
1516 if (kfifo_len(&tport->write_fifo) == 0
1517 || timeout == 0 || signal_pending(current)
1518 || tdev->td_urb_error
1519 || port->serial->disconnected) /* disconnect */
1520 break;
1521 spin_unlock_irq(&tport->tp_lock);
1522 timeout = schedule_timeout(timeout);
1523 spin_lock_irq(&tport->tp_lock);
1524 }
1525 set_current_state(TASK_RUNNING);
1526 remove_wait_queue(&tport->tp_write_wait, &wait);
1527
1528 /* flush any remaining data in the buffer */
1529 if (flush)
1530 kfifo_reset_out(&tport->write_fifo);
1531
1532 spin_unlock_irq(&tport->tp_lock);
1533
1534 mutex_lock(&port->serial->disc_mutex);
1535 /* wait for data to drain from the device */
1536 /* wait for empty tx register, plus 20 ms */
1537 timeout += jiffies;
1538 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1539 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1540 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1541 && !port->serial->disconnected) {
1542 if (ti_get_lsr(tport))
1543 break;
1544 mutex_unlock(&port->serial->disc_mutex);
1545 msleep_interruptible(20);
1546 mutex_lock(&port->serial->disc_mutex);
1547 }
1548 mutex_unlock(&port->serial->disc_mutex);
1549 }
1550
1551
1552 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1553 {
1554 unsigned long flags;
1555
1556 spin_lock_irqsave(&tport->tp_lock, flags);
1557
1558 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1559 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1560
1561 spin_unlock_irqrestore(&tport->tp_lock, flags);
1562 }
1563
1564
1565 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1566 {
1567 struct urb *urb;
1568 int status = 0;
1569 unsigned long flags;
1570
1571 spin_lock_irqsave(&tport->tp_lock, flags);
1572
1573 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1574 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1575 urb = tport->tp_port->read_urb;
1576 spin_unlock_irqrestore(&tport->tp_lock, flags);
1577 urb->complete = ti_bulk_in_callback;
1578 urb->context = tport;
1579 urb->dev = tport->tp_port->serial->dev;
1580 status = usb_submit_urb(urb, GFP_KERNEL);
1581 } else {
1582 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1583 spin_unlock_irqrestore(&tport->tp_lock, flags);
1584 }
1585
1586 return status;
1587 }
1588
1589
1590 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1591 __u16 moduleid, __u16 value, __u8 *data, int size)
1592 {
1593 int status;
1594
1595 status = usb_control_msg(tdev->td_serial->dev,
1596 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1597 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1598 value, moduleid, data, size, 1000);
1599
1600 if (status == size)
1601 status = 0;
1602
1603 if (status > 0)
1604 status = -ECOMM;
1605
1606 return status;
1607 }
1608
1609
1610 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1611 __u16 moduleid, __u16 value, __u8 *data, int size)
1612 {
1613 int status;
1614
1615 status = usb_control_msg(tdev->td_serial->dev,
1616 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1617 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1618 value, moduleid, data, size, 1000);
1619
1620 if (status == size)
1621 status = 0;
1622
1623 if (status > 0)
1624 status = -ECOMM;
1625
1626 return status;
1627 }
1628
1629
1630 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1631 __u8 mask, __u8 byte)
1632 {
1633 int status;
1634 unsigned int size;
1635 struct ti_write_data_bytes *data;
1636 struct device *dev = &tdev->td_serial->dev->dev;
1637
1638 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1639 __func__, addr, mask, byte);
1640
1641 size = sizeof(struct ti_write_data_bytes) + 2;
1642 data = kmalloc(size, GFP_KERNEL);
1643 if (!data) {
1644 dev_err(dev, "%s - out of memory\n", __func__);
1645 return -ENOMEM;
1646 }
1647
1648 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1649 data->bDataType = TI_RW_DATA_BYTE;
1650 data->bDataCounter = 1;
1651 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1652 data->wBaseAddrLo = cpu_to_be16(addr);
1653 data->bData[0] = mask;
1654 data->bData[1] = byte;
1655
1656 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1657 (__u8 *)data, size);
1658
1659 if (status < 0)
1660 dev_err(dev, "%s - failed, %d\n", __func__, status);
1661
1662 kfree(data);
1663
1664 return status;
1665 }
1666
1667 static int ti_do_download(struct usb_device *dev, int pipe,
1668 u8 *buffer, int size)
1669 {
1670 int pos;
1671 u8 cs = 0;
1672 int done;
1673 struct ti_firmware_header *header;
1674 int status = 0;
1675 int len;
1676
1677 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1678 cs = (__u8)(cs + buffer[pos]);
1679
1680 header = (struct ti_firmware_header *)buffer;
1681 header->wLength = cpu_to_le16((__u16)(size
1682 - sizeof(struct ti_firmware_header)));
1683 header->bCheckSum = cs;
1684
1685 dbg("%s - downloading firmware", __func__);
1686 for (pos = 0; pos < size; pos += done) {
1687 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1688 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1689 &done, 1000);
1690 if (status)
1691 break;
1692 }
1693 return status;
1694 }
1695
1696 static int ti_download_firmware(struct ti_device *tdev)
1697 {
1698 int status;
1699 int buffer_size;
1700 __u8 *buffer;
1701 struct usb_device *dev = tdev->td_serial->dev;
1702 unsigned int pipe = usb_sndbulkpipe(dev,
1703 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1704 const struct firmware *fw_p;
1705 char buf[32];
1706
1707 dbg("%s\n", __func__);
1708 /* try ID specific firmware first, then try generic firmware */
1709 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1710 dev->descriptor.idProduct);
1711 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1712 buf[0] = '\0';
1713 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1714 switch (dev->descriptor.idProduct) {
1715 case MTS_CDMA_PRODUCT_ID:
1716 strcpy(buf, "mts_cdma.fw");
1717 break;
1718 case MTS_GSM_PRODUCT_ID:
1719 strcpy(buf, "mts_gsm.fw");
1720 break;
1721 case MTS_EDGE_PRODUCT_ID:
1722 strcpy(buf, "mts_edge.fw");
1723 break;
1724 case MTS_MT9234MU_PRODUCT_ID:
1725 strcpy(buf, "mts_mt9234mu.fw");
1726 break;
1727 case MTS_MT9234ZBA_PRODUCT_ID:
1728 strcpy(buf, "mts_mt9234zba.fw");
1729 break;
1730 case MTS_MT9234ZBAOLD_PRODUCT_ID:
1731 strcpy(buf, "mts_mt9234zba.fw");
1732 break; }
1733 }
1734 if (buf[0] == '\0') {
1735 if (tdev->td_is_3410)
1736 strcpy(buf, "ti_3410.fw");
1737 else
1738 strcpy(buf, "ti_5052.fw");
1739 }
1740 status = request_firmware(&fw_p, buf, &dev->dev);
1741 }
1742 if (status) {
1743 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1744 return -ENOENT;
1745 }
1746 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1747 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1748 release_firmware(fw_p);
1749 return -ENOENT;
1750 }
1751
1752 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1753 buffer = kmalloc(buffer_size, GFP_KERNEL);
1754 if (buffer) {
1755 memcpy(buffer, fw_p->data, fw_p->size);
1756 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1757 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1758 kfree(buffer);
1759 } else {
1760 dbg("%s ENOMEM\n", __func__);
1761 status = -ENOMEM;
1762 }
1763 release_firmware(fw_p);
1764 if (status) {
1765 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1766 __func__, status);
1767 return status;
1768 }
1769
1770 dbg("%s - download successful", __func__);
1771
1772 return 0;
1773 }