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Merge branches 'devel-stable', 'entry', 'fixes', 'mach-types', 'misc' and 'smp-hotplu...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / serial / ti_usb_3410_5052.c
1 /* vi: ts=8 sw=8
2 *
3 * TI 3410/5052 USB Serial Driver
4 *
5 * Copyright (C) 2004 Texas Instruments
6 *
7 * This driver is based on the Linux io_ti driver, which is
8 * Copyright (C) 2000-2002 Inside Out Networks
9 * Copyright (C) 2001-2002 Greg Kroah-Hartman
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * For questions or problems with this driver, contact Texas Instruments
17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18 * Peter Berger <pberger@brimson.com>.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/firmware.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/kfifo.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "ti_usb_3410_5052.h"
40
41 /* Defines */
42
43 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
44 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
45
46 #define TI_FIRMWARE_BUF_SIZE 16284
47
48 #define TI_WRITE_BUF_SIZE 1024
49
50 #define TI_TRANSFER_TIMEOUT 2
51
52 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
53
54 /* supported setserial flags */
55 #define TI_SET_SERIAL_FLAGS 0
56
57 /* read urb states */
58 #define TI_READ_URB_RUNNING 0
59 #define TI_READ_URB_STOPPING 1
60 #define TI_READ_URB_STOPPED 2
61
62 #define TI_EXTRA_VID_PID_COUNT 5
63
64
65 /* Structures */
66
67 struct ti_port {
68 int tp_is_open;
69 __u8 tp_msr;
70 __u8 tp_lsr;
71 __u8 tp_shadow_mcr;
72 __u8 tp_uart_mode; /* 232 or 485 modes */
73 unsigned int tp_uart_base_addr;
74 int tp_flags;
75 int tp_closing_wait;/* in .01 secs */
76 struct async_icount tp_icount;
77 wait_queue_head_t tp_write_wait;
78 struct ti_device *tp_tdev;
79 struct usb_serial_port *tp_port;
80 spinlock_t tp_lock;
81 int tp_read_urb_state;
82 int tp_write_urb_in_use;
83 struct kfifo write_fifo;
84 };
85
86 struct ti_device {
87 struct mutex td_open_close_lock;
88 int td_open_port_count;
89 struct usb_serial *td_serial;
90 int td_is_3410;
91 int td_urb_error;
92 };
93
94
95 /* Function Declarations */
96
97 static int ti_startup(struct usb_serial *serial);
98 static void ti_release(struct usb_serial *serial);
99 static int ti_port_probe(struct usb_serial_port *port);
100 static int ti_port_remove(struct usb_serial_port *port);
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 usb_serial_port *port, unsigned char *data,
124 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 usb_serial_port *port, struct ti_device *tdev,
145 unsigned long addr, __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 closing_wait = TI_DEFAULT_CLOSING_WAIT;
154 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
155 static unsigned int vendor_3410_count;
156 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
157 static unsigned int product_3410_count;
158 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
159 static unsigned int vendor_5052_count;
160 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
161 static unsigned int product_5052_count;
162
163 /* supported devices */
164 /* the array dimension is the number of default entries plus */
165 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
166 /* null entry */
167 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
168 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
169 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
170 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
171 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
172 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
173 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
174 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
175 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
176 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
177 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
178 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
179 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
180 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
181 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
182 { USB_DEVICE(TI_VENDOR_ID, FRI2_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[19+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 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
212 { }
213 };
214
215 static struct usb_serial_driver ti_1port_device = {
216 .driver = {
217 .owner = THIS_MODULE,
218 .name = "ti_usb_3410_5052_1",
219 },
220 .description = "TI USB 3410 1 port adapter",
221 .id_table = ti_id_table_3410,
222 .num_ports = 1,
223 .attach = ti_startup,
224 .release = ti_release,
225 .port_probe = ti_port_probe,
226 .port_remove = ti_port_remove,
227 .open = ti_open,
228 .close = ti_close,
229 .write = ti_write,
230 .write_room = ti_write_room,
231 .chars_in_buffer = ti_chars_in_buffer,
232 .throttle = ti_throttle,
233 .unthrottle = ti_unthrottle,
234 .ioctl = ti_ioctl,
235 .set_termios = ti_set_termios,
236 .tiocmget = ti_tiocmget,
237 .tiocmset = ti_tiocmset,
238 .get_icount = ti_get_icount,
239 .break_ctl = ti_break,
240 .read_int_callback = ti_interrupt_callback,
241 .read_bulk_callback = ti_bulk_in_callback,
242 .write_bulk_callback = ti_bulk_out_callback,
243 };
244
245 static struct usb_serial_driver ti_2port_device = {
246 .driver = {
247 .owner = THIS_MODULE,
248 .name = "ti_usb_3410_5052_2",
249 },
250 .description = "TI USB 5052 2 port adapter",
251 .id_table = ti_id_table_5052,
252 .num_ports = 2,
253 .attach = ti_startup,
254 .release = ti_release,
255 .port_probe = ti_port_probe,
256 .port_remove = ti_port_remove,
257 .open = ti_open,
258 .close = ti_close,
259 .write = ti_write,
260 .write_room = ti_write_room,
261 .chars_in_buffer = ti_chars_in_buffer,
262 .throttle = ti_throttle,
263 .unthrottle = ti_unthrottle,
264 .ioctl = ti_ioctl,
265 .set_termios = ti_set_termios,
266 .tiocmget = ti_tiocmget,
267 .tiocmset = ti_tiocmset,
268 .get_icount = ti_get_icount,
269 .break_ctl = ti_break,
270 .read_int_callback = ti_interrupt_callback,
271 .read_bulk_callback = ti_bulk_in_callback,
272 .write_bulk_callback = ti_bulk_out_callback,
273 };
274
275 static struct usb_serial_driver * const serial_drivers[] = {
276 &ti_1port_device, &ti_2port_device, NULL
277 };
278
279 /* Module */
280
281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
283 MODULE_LICENSE("GPL");
284
285 MODULE_FIRMWARE("ti_3410.fw");
286 MODULE_FIRMWARE("ti_5052.fw");
287 MODULE_FIRMWARE("mts_cdma.fw");
288 MODULE_FIRMWARE("mts_gsm.fw");
289 MODULE_FIRMWARE("mts_edge.fw");
290 MODULE_FIRMWARE("mts_mt9234mu.fw");
291 MODULE_FIRMWARE("mts_mt9234zba.fw");
292
293 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
294 MODULE_PARM_DESC(closing_wait,
295 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
296
297 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
298 MODULE_PARM_DESC(vendor_3410,
299 "Vendor ids for 3410 based devices, 1-5 short integers");
300 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
301 MODULE_PARM_DESC(product_3410,
302 "Product ids for 3410 based devices, 1-5 short integers");
303 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
304 MODULE_PARM_DESC(vendor_5052,
305 "Vendor ids for 5052 based devices, 1-5 short integers");
306 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
307 MODULE_PARM_DESC(product_5052,
308 "Product ids for 5052 based devices, 1-5 short integers");
309
310 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
311
312
313 /* Functions */
314
315 static int __init ti_init(void)
316 {
317 int i, j, c;
318
319 /* insert extra vendor and product ids */
320 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
321 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
322 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
323 ti_id_table_3410[j].idVendor = vendor_3410[i];
324 ti_id_table_3410[j].idProduct = product_3410[i];
325 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
326 ti_id_table_combined[c].idVendor = vendor_3410[i];
327 ti_id_table_combined[c].idProduct = product_3410[i];
328 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
329 }
330 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
331 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
332 ti_id_table_5052[j].idVendor = vendor_5052[i];
333 ti_id_table_5052[j].idProduct = product_5052[i];
334 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
335 ti_id_table_combined[c].idVendor = vendor_5052[i];
336 ti_id_table_combined[c].idProduct = product_5052[i];
337 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
338 }
339
340 return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
341 }
342
343 static void __exit ti_exit(void)
344 {
345 usb_serial_deregister_drivers(serial_drivers);
346 }
347
348 module_init(ti_init);
349 module_exit(ti_exit);
350
351
352 static int ti_startup(struct usb_serial *serial)
353 {
354 struct ti_device *tdev;
355 struct usb_device *dev = serial->dev;
356 int status;
357
358 dev_dbg(&dev->dev,
359 "%s - product 0x%4X, num configurations %d, configuration value %d",
360 __func__, le16_to_cpu(dev->descriptor.idProduct),
361 dev->descriptor.bNumConfigurations,
362 dev->actconfig->desc.bConfigurationValue);
363
364 /* create device structure */
365 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
366 if (tdev == NULL) {
367 dev_err(&dev->dev, "%s - out of memory\n", __func__);
368 return -ENOMEM;
369 }
370 mutex_init(&tdev->td_open_close_lock);
371 tdev->td_serial = serial;
372 usb_set_serial_data(serial, tdev);
373
374 /* determine device type */
375 if (usb_match_id(serial->interface, ti_id_table_3410))
376 tdev->td_is_3410 = 1;
377 dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
378 tdev->td_is_3410 ? "3410" : "5052");
379
380 /* if we have only 1 configuration, download firmware */
381 if (dev->descriptor.bNumConfigurations == 1) {
382 status = ti_download_firmware(tdev);
383
384 if (status != 0)
385 goto free_tdev;
386
387 /* 3410 must be reset, 5052 resets itself */
388 if (tdev->td_is_3410) {
389 msleep_interruptible(100);
390 usb_reset_device(dev);
391 }
392
393 status = -ENODEV;
394 goto free_tdev;
395 }
396
397 /* the second configuration must be set */
398 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
399 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
400 status = status ? status : -ENODEV;
401 goto free_tdev;
402 }
403
404 return 0;
405
406 free_tdev:
407 kfree(tdev);
408 usb_set_serial_data(serial, NULL);
409 return status;
410 }
411
412
413 static void ti_release(struct usb_serial *serial)
414 {
415 struct ti_device *tdev = usb_get_serial_data(serial);
416
417 kfree(tdev);
418 }
419
420 static int ti_port_probe(struct usb_serial_port *port)
421 {
422 struct ti_port *tport;
423
424 tport = kzalloc(sizeof(*tport), GFP_KERNEL);
425 if (!tport)
426 return -ENOMEM;
427
428 spin_lock_init(&tport->tp_lock);
429 if (port == port->serial->port[0])
430 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
431 else
432 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
433 tport->tp_closing_wait = closing_wait;
434 init_waitqueue_head(&tport->tp_write_wait);
435 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) {
436 kfree(tport);
437 return -ENOMEM;
438 }
439 tport->tp_port = port;
440 tport->tp_tdev = usb_get_serial_data(port->serial);
441 tport->tp_uart_mode = 0; /* default is RS232 */
442
443 usb_set_serial_port_data(port, tport);
444
445 return 0;
446 }
447
448 static int ti_port_remove(struct usb_serial_port *port)
449 {
450 struct ti_port *tport;
451
452 tport = usb_get_serial_port_data(port);
453 kfifo_free(&tport->write_fifo);
454 kfree(tport);
455
456 return 0;
457 }
458
459 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
460 {
461 struct ti_port *tport = usb_get_serial_port_data(port);
462 struct ti_device *tdev;
463 struct usb_device *dev;
464 struct urb *urb;
465 int port_number;
466 int status;
467 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
468 TI_PIPE_TIMEOUT_ENABLE |
469 (TI_TRANSFER_TIMEOUT << 2));
470
471 if (tport == NULL)
472 return -ENODEV;
473
474 dev = port->serial->dev;
475 tdev = tport->tp_tdev;
476
477 /* only one open on any port on a device at a time */
478 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
479 return -ERESTARTSYS;
480
481 port_number = port->number - port->serial->minor;
482
483 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
484
485 tport->tp_msr = 0;
486 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
487
488 /* start interrupt urb the first time a port is opened on this device */
489 if (tdev->td_open_port_count == 0) {
490 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
491 urb = tdev->td_serial->port[0]->interrupt_in_urb;
492 if (!urb) {
493 dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
494 status = -EINVAL;
495 goto release_lock;
496 }
497 urb->context = tdev;
498 status = usb_submit_urb(urb, GFP_KERNEL);
499 if (status) {
500 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
501 goto release_lock;
502 }
503 }
504
505 if (tty)
506 ti_set_termios(tty, port, &tty->termios);
507
508 dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
509 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
510 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
511 if (status) {
512 dev_err(&port->dev, "%s - cannot send open command, %d\n",
513 __func__, status);
514 goto unlink_int_urb;
515 }
516
517 dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
518 status = ti_command_out_sync(tdev, TI_START_PORT,
519 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
520 if (status) {
521 dev_err(&port->dev, "%s - cannot send start command, %d\n",
522 __func__, status);
523 goto unlink_int_urb;
524 }
525
526 dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
527 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
528 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
529 if (status) {
530 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
531 __func__, status);
532 goto unlink_int_urb;
533 }
534 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
535 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
536 if (status) {
537 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
538 __func__, status);
539 goto unlink_int_urb;
540 }
541
542 /* reset the data toggle on the bulk endpoints to work around bug in
543 * host controllers where things get out of sync some times */
544 usb_clear_halt(dev, port->write_urb->pipe);
545 usb_clear_halt(dev, port->read_urb->pipe);
546
547 if (tty)
548 ti_set_termios(tty, port, &tty->termios);
549
550 dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
551 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
552 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
553 if (status) {
554 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
555 __func__, status);
556 goto unlink_int_urb;
557 }
558
559 dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
560 status = ti_command_out_sync(tdev, TI_START_PORT,
561 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
562 if (status) {
563 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
564 __func__, status);
565 goto unlink_int_urb;
566 }
567
568 /* start read urb */
569 dev_dbg(&port->dev, "%s - start read urb\n", __func__);
570 urb = port->read_urb;
571 if (!urb) {
572 dev_err(&port->dev, "%s - no read urb\n", __func__);
573 status = -EINVAL;
574 goto unlink_int_urb;
575 }
576 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
577 urb->context = tport;
578 status = usb_submit_urb(urb, GFP_KERNEL);
579 if (status) {
580 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
581 __func__, status);
582 goto unlink_int_urb;
583 }
584
585 tport->tp_is_open = 1;
586 ++tdev->td_open_port_count;
587
588 goto release_lock;
589
590 unlink_int_urb:
591 if (tdev->td_open_port_count == 0)
592 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
593 release_lock:
594 mutex_unlock(&tdev->td_open_close_lock);
595 dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
596 return status;
597 }
598
599
600 static void ti_close(struct usb_serial_port *port)
601 {
602 struct ti_device *tdev;
603 struct ti_port *tport;
604 int port_number;
605 int status;
606 int do_unlock;
607
608 tdev = usb_get_serial_data(port->serial);
609 tport = usb_get_serial_port_data(port);
610 if (tdev == NULL || tport == NULL)
611 return;
612
613 tport->tp_is_open = 0;
614
615 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
616
617 usb_kill_urb(port->read_urb);
618 usb_kill_urb(port->write_urb);
619 tport->tp_write_urb_in_use = 0;
620
621 port_number = port->number - port->serial->minor;
622
623 dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
624 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
625 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
626 if (status)
627 dev_err(&port->dev,
628 "%s - cannot send close port command, %d\n"
629 , __func__, status);
630
631 /* if mutex_lock is interrupted, continue anyway */
632 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
633 --tport->tp_tdev->td_open_port_count;
634 if (tport->tp_tdev->td_open_port_count <= 0) {
635 /* last port is closed, shut down interrupt urb */
636 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
637 tport->tp_tdev->td_open_port_count = 0;
638 }
639 if (do_unlock)
640 mutex_unlock(&tdev->td_open_close_lock);
641 }
642
643
644 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
645 const unsigned char *data, int count)
646 {
647 struct ti_port *tport = usb_get_serial_port_data(port);
648
649 if (count == 0) {
650 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
651 return 0;
652 }
653
654 if (tport == NULL || !tport->tp_is_open)
655 return -ENODEV;
656
657 count = kfifo_in_locked(&tport->write_fifo, data, count,
658 &tport->tp_lock);
659 ti_send(tport);
660
661 return count;
662 }
663
664
665 static int ti_write_room(struct tty_struct *tty)
666 {
667 struct usb_serial_port *port = tty->driver_data;
668 struct ti_port *tport = usb_get_serial_port_data(port);
669 int room = 0;
670 unsigned long flags;
671
672 if (tport == NULL)
673 return 0;
674
675 spin_lock_irqsave(&tport->tp_lock, flags);
676 room = kfifo_avail(&tport->write_fifo);
677 spin_unlock_irqrestore(&tport->tp_lock, flags);
678
679 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
680 return room;
681 }
682
683
684 static int ti_chars_in_buffer(struct tty_struct *tty)
685 {
686 struct usb_serial_port *port = tty->driver_data;
687 struct ti_port *tport = usb_get_serial_port_data(port);
688 int chars = 0;
689 unsigned long flags;
690
691 if (tport == NULL)
692 return 0;
693
694 spin_lock_irqsave(&tport->tp_lock, flags);
695 chars = kfifo_len(&tport->write_fifo);
696 spin_unlock_irqrestore(&tport->tp_lock, flags);
697
698 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
699 return chars;
700 }
701
702
703 static void ti_throttle(struct tty_struct *tty)
704 {
705 struct usb_serial_port *port = tty->driver_data;
706 struct ti_port *tport = usb_get_serial_port_data(port);
707
708 if (tport == NULL)
709 return;
710
711 if (I_IXOFF(tty) || C_CRTSCTS(tty))
712 ti_stop_read(tport, tty);
713
714 }
715
716
717 static void ti_unthrottle(struct tty_struct *tty)
718 {
719 struct usb_serial_port *port = tty->driver_data;
720 struct ti_port *tport = usb_get_serial_port_data(port);
721 int status;
722
723 if (tport == NULL)
724 return;
725
726 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
727 status = ti_restart_read(tport, tty);
728 if (status)
729 dev_err(&port->dev, "%s - cannot restart read, %d\n",
730 __func__, status);
731 }
732 }
733
734 static int ti_get_icount(struct tty_struct *tty,
735 struct serial_icounter_struct *icount)
736 {
737 struct usb_serial_port *port = tty->driver_data;
738 struct ti_port *tport = usb_get_serial_port_data(port);
739 struct async_icount cnow = tport->tp_icount;
740
741 dev_dbg(&port->dev, "%s - TIOCGICOUNT RX=%d, TX=%d\n", __func__,
742 cnow.rx, cnow.tx);
743
744 icount->cts = cnow.cts;
745 icount->dsr = cnow.dsr;
746 icount->rng = cnow.rng;
747 icount->dcd = cnow.dcd;
748 icount->rx = cnow.rx;
749 icount->tx = cnow.tx;
750 icount->frame = cnow.frame;
751 icount->overrun = cnow.overrun;
752 icount->parity = cnow.parity;
753 icount->brk = cnow.brk;
754 icount->buf_overrun = cnow.buf_overrun;
755
756 return 0;
757 }
758
759 static int ti_ioctl(struct tty_struct *tty,
760 unsigned int cmd, unsigned long arg)
761 {
762 struct usb_serial_port *port = tty->driver_data;
763 struct ti_port *tport = usb_get_serial_port_data(port);
764 struct async_icount cnow;
765 struct async_icount cprev;
766
767 dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
768
769 if (tport == NULL)
770 return -ENODEV;
771
772 switch (cmd) {
773 case TIOCGSERIAL:
774 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
775 return ti_get_serial_info(tport,
776 (struct serial_struct __user *)arg);
777 case TIOCSSERIAL:
778 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
779 return ti_set_serial_info(tty, tport,
780 (struct serial_struct __user *)arg);
781 case TIOCMIWAIT:
782 dev_dbg(&port->dev, "%s - TIOCMIWAIT\n", __func__);
783 cprev = tport->tp_icount;
784 while (1) {
785 interruptible_sleep_on(&port->delta_msr_wait);
786 if (signal_pending(current))
787 return -ERESTARTSYS;
788
789 if (port->serial->disconnected)
790 return -EIO;
791
792 cnow = tport->tp_icount;
793 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
794 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
795 return -EIO; /* no change => error */
796 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
797 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
798 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
799 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
800 return 0;
801 cprev = cnow;
802 }
803 break;
804 }
805 return -ENOIOCTLCMD;
806 }
807
808
809 static void ti_set_termios(struct tty_struct *tty,
810 struct usb_serial_port *port, struct ktermios *old_termios)
811 {
812 struct ti_port *tport = usb_get_serial_port_data(port);
813 struct ti_uart_config *config;
814 tcflag_t cflag, iflag;
815 int baud;
816 int status;
817 int port_number = port->number - port->serial->minor;
818 unsigned int mcr;
819
820 cflag = tty->termios.c_cflag;
821 iflag = tty->termios.c_iflag;
822
823 dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
824 dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
825 old_termios->c_cflag, old_termios->c_iflag);
826
827 if (tport == NULL)
828 return;
829
830 config = kmalloc(sizeof(*config), GFP_KERNEL);
831 if (!config) {
832 dev_err(&port->dev, "%s - out of memory\n", __func__);
833 return;
834 }
835
836 config->wFlags = 0;
837
838 /* these flags must be set */
839 config->wFlags |= TI_UART_ENABLE_MS_INTS;
840 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
841 config->bUartMode = (__u8)(tport->tp_uart_mode);
842
843 switch (cflag & CSIZE) {
844 case CS5:
845 config->bDataBits = TI_UART_5_DATA_BITS;
846 break;
847 case CS6:
848 config->bDataBits = TI_UART_6_DATA_BITS;
849 break;
850 case CS7:
851 config->bDataBits = TI_UART_7_DATA_BITS;
852 break;
853 default:
854 case CS8:
855 config->bDataBits = TI_UART_8_DATA_BITS;
856 break;
857 }
858
859 /* CMSPAR isn't supported by this driver */
860 tty->termios.c_cflag &= ~CMSPAR;
861
862 if (cflag & PARENB) {
863 if (cflag & PARODD) {
864 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
865 config->bParity = TI_UART_ODD_PARITY;
866 } else {
867 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
868 config->bParity = TI_UART_EVEN_PARITY;
869 }
870 } else {
871 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
872 config->bParity = TI_UART_NO_PARITY;
873 }
874
875 if (cflag & CSTOPB)
876 config->bStopBits = TI_UART_2_STOP_BITS;
877 else
878 config->bStopBits = TI_UART_1_STOP_BITS;
879
880 if (cflag & CRTSCTS) {
881 /* RTS flow control must be off to drop RTS for baud rate B0 */
882 if ((cflag & CBAUD) != B0)
883 config->wFlags |= TI_UART_ENABLE_RTS_IN;
884 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
885 } else {
886 tty->hw_stopped = 0;
887 ti_restart_read(tport, tty);
888 }
889
890 if (I_IXOFF(tty) || I_IXON(tty)) {
891 config->cXon = START_CHAR(tty);
892 config->cXoff = STOP_CHAR(tty);
893
894 if (I_IXOFF(tty))
895 config->wFlags |= TI_UART_ENABLE_X_IN;
896 else
897 ti_restart_read(tport, tty);
898
899 if (I_IXON(tty))
900 config->wFlags |= TI_UART_ENABLE_X_OUT;
901 }
902
903 baud = tty_get_baud_rate(tty);
904 if (!baud)
905 baud = 9600;
906 if (tport->tp_tdev->td_is_3410)
907 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
908 else
909 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
910
911 /* FIXME: Should calculate resulting baud here and report it back */
912 if ((cflag & CBAUD) != B0)
913 tty_encode_baud_rate(tty, baud, baud);
914
915 dev_dbg(&port->dev,
916 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
917 __func__, baud, config->wBaudRate, config->wFlags,
918 config->bDataBits, config->bParity, config->bStopBits,
919 config->cXon, config->cXoff, config->bUartMode);
920
921 cpu_to_be16s(&config->wBaudRate);
922 cpu_to_be16s(&config->wFlags);
923
924 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
925 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
926 sizeof(*config));
927 if (status)
928 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
929 __func__, port_number, status);
930
931 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
932 mcr = tport->tp_shadow_mcr;
933 /* if baud rate is B0, clear RTS and DTR */
934 if ((cflag & CBAUD) == B0)
935 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
936 status = ti_set_mcr(tport, mcr);
937 if (status)
938 dev_err(&port->dev,
939 "%s - cannot set modem control on port %d, %d\n",
940 __func__, port_number, status);
941
942 kfree(config);
943 }
944
945
946 static int ti_tiocmget(struct tty_struct *tty)
947 {
948 struct usb_serial_port *port = tty->driver_data;
949 struct ti_port *tport = usb_get_serial_port_data(port);
950 unsigned int result;
951 unsigned int msr;
952 unsigned int mcr;
953 unsigned long flags;
954
955 if (tport == NULL)
956 return -ENODEV;
957
958 spin_lock_irqsave(&tport->tp_lock, flags);
959 msr = tport->tp_msr;
960 mcr = tport->tp_shadow_mcr;
961 spin_unlock_irqrestore(&tport->tp_lock, flags);
962
963 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
964 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
965 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
966 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
967 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
968 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
969 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
970
971 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
972
973 return result;
974 }
975
976
977 static int ti_tiocmset(struct tty_struct *tty,
978 unsigned int set, unsigned int clear)
979 {
980 struct usb_serial_port *port = tty->driver_data;
981 struct ti_port *tport = usb_get_serial_port_data(port);
982 unsigned int mcr;
983 unsigned long flags;
984
985 if (tport == NULL)
986 return -ENODEV;
987
988 spin_lock_irqsave(&tport->tp_lock, flags);
989 mcr = tport->tp_shadow_mcr;
990
991 if (set & TIOCM_RTS)
992 mcr |= TI_MCR_RTS;
993 if (set & TIOCM_DTR)
994 mcr |= TI_MCR_DTR;
995 if (set & TIOCM_LOOP)
996 mcr |= TI_MCR_LOOP;
997
998 if (clear & TIOCM_RTS)
999 mcr &= ~TI_MCR_RTS;
1000 if (clear & TIOCM_DTR)
1001 mcr &= ~TI_MCR_DTR;
1002 if (clear & TIOCM_LOOP)
1003 mcr &= ~TI_MCR_LOOP;
1004 spin_unlock_irqrestore(&tport->tp_lock, flags);
1005
1006 return ti_set_mcr(tport, mcr);
1007 }
1008
1009
1010 static void ti_break(struct tty_struct *tty, int break_state)
1011 {
1012 struct usb_serial_port *port = tty->driver_data;
1013 struct ti_port *tport = usb_get_serial_port_data(port);
1014 int status;
1015
1016 dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1017
1018 if (tport == NULL)
1019 return;
1020
1021 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1022
1023 status = ti_write_byte(port, tport->tp_tdev,
1024 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1025 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1026
1027 if (status)
1028 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1029 }
1030
1031
1032 static void ti_interrupt_callback(struct urb *urb)
1033 {
1034 struct ti_device *tdev = urb->context;
1035 struct usb_serial_port *port;
1036 struct usb_serial *serial = tdev->td_serial;
1037 struct ti_port *tport;
1038 struct device *dev = &urb->dev->dev;
1039 unsigned char *data = urb->transfer_buffer;
1040 int length = urb->actual_length;
1041 int port_number;
1042 int function;
1043 int status = urb->status;
1044 int retval;
1045 __u8 msr;
1046
1047 switch (status) {
1048 case 0:
1049 break;
1050 case -ECONNRESET:
1051 case -ENOENT:
1052 case -ESHUTDOWN:
1053 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1054 tdev->td_urb_error = 1;
1055 return;
1056 default:
1057 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1058 tdev->td_urb_error = 1;
1059 goto exit;
1060 }
1061
1062 if (length != 2) {
1063 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1064 goto exit;
1065 }
1066
1067 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1068 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1069 goto exit;
1070 }
1071
1072 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1073 function = TI_GET_FUNC_FROM_CODE(data[0]);
1074
1075 dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1076 __func__, port_number, function, data[1]);
1077
1078 if (port_number >= serial->num_ports) {
1079 dev_err(dev, "%s - bad port number, %d\n",
1080 __func__, port_number);
1081 goto exit;
1082 }
1083
1084 port = serial->port[port_number];
1085
1086 tport = usb_get_serial_port_data(port);
1087 if (!tport)
1088 goto exit;
1089
1090 switch (function) {
1091 case TI_CODE_DATA_ERROR:
1092 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1093 __func__, port_number, data[1]);
1094 break;
1095
1096 case TI_CODE_MODEM_STATUS:
1097 msr = data[1];
1098 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1099 ti_handle_new_msr(tport, msr);
1100 break;
1101
1102 default:
1103 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1104 __func__, data[1]);
1105 break;
1106 }
1107
1108 exit:
1109 retval = usb_submit_urb(urb, GFP_ATOMIC);
1110 if (retval)
1111 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1112 __func__, retval);
1113 }
1114
1115
1116 static void ti_bulk_in_callback(struct urb *urb)
1117 {
1118 struct ti_port *tport = urb->context;
1119 struct usb_serial_port *port = tport->tp_port;
1120 struct device *dev = &urb->dev->dev;
1121 int status = urb->status;
1122 int retval = 0;
1123
1124 switch (status) {
1125 case 0:
1126 break;
1127 case -ECONNRESET:
1128 case -ENOENT:
1129 case -ESHUTDOWN:
1130 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1131 tport->tp_tdev->td_urb_error = 1;
1132 wake_up_interruptible(&tport->tp_write_wait);
1133 return;
1134 default:
1135 dev_err(dev, "%s - nonzero urb status, %d\n",
1136 __func__, status);
1137 tport->tp_tdev->td_urb_error = 1;
1138 wake_up_interruptible(&tport->tp_write_wait);
1139 }
1140
1141 if (status == -EPIPE)
1142 goto exit;
1143
1144 if (status) {
1145 dev_err(dev, "%s - stopping read!\n", __func__);
1146 return;
1147 }
1148
1149 if (urb->actual_length) {
1150 usb_serial_debug_data(dev, __func__, urb->actual_length,
1151 urb->transfer_buffer);
1152
1153 if (!tport->tp_is_open)
1154 dev_dbg(dev, "%s - port closed, dropping data\n",
1155 __func__);
1156 else
1157 ti_recv(port, urb->transfer_buffer, urb->actual_length);
1158 spin_lock(&tport->tp_lock);
1159 tport->tp_icount.rx += urb->actual_length;
1160 spin_unlock(&tport->tp_lock);
1161 }
1162
1163 exit:
1164 /* continue to read unless stopping */
1165 spin_lock(&tport->tp_lock);
1166 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1167 retval = usb_submit_urb(urb, GFP_ATOMIC);
1168 else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1169 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1170
1171 spin_unlock(&tport->tp_lock);
1172 if (retval)
1173 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1174 __func__, retval);
1175 }
1176
1177
1178 static void ti_bulk_out_callback(struct urb *urb)
1179 {
1180 struct ti_port *tport = urb->context;
1181 struct usb_serial_port *port = tport->tp_port;
1182 int status = urb->status;
1183
1184 tport->tp_write_urb_in_use = 0;
1185
1186 switch (status) {
1187 case 0:
1188 break;
1189 case -ECONNRESET:
1190 case -ENOENT:
1191 case -ESHUTDOWN:
1192 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1193 tport->tp_tdev->td_urb_error = 1;
1194 wake_up_interruptible(&tport->tp_write_wait);
1195 return;
1196 default:
1197 dev_err_console(port, "%s - nonzero urb status, %d\n",
1198 __func__, status);
1199 tport->tp_tdev->td_urb_error = 1;
1200 wake_up_interruptible(&tport->tp_write_wait);
1201 }
1202
1203 /* send any buffered data */
1204 ti_send(tport);
1205 }
1206
1207
1208 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1209 int length)
1210 {
1211 int cnt;
1212
1213 do {
1214 cnt = tty_insert_flip_string(&port->port, data, length);
1215 if (cnt < length) {
1216 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1217 __func__, length - cnt);
1218 if (cnt == 0)
1219 break;
1220 }
1221 tty_flip_buffer_push(&port->port);
1222 data += cnt;
1223 length -= cnt;
1224 } while (length > 0);
1225 }
1226
1227
1228 static void ti_send(struct ti_port *tport)
1229 {
1230 int count, result;
1231 struct usb_serial_port *port = tport->tp_port;
1232 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1233 unsigned long flags;
1234
1235 spin_lock_irqsave(&tport->tp_lock, flags);
1236
1237 if (tport->tp_write_urb_in_use)
1238 goto unlock;
1239
1240 count = kfifo_out(&tport->write_fifo,
1241 port->write_urb->transfer_buffer,
1242 port->bulk_out_size);
1243
1244 if (count == 0)
1245 goto unlock;
1246
1247 tport->tp_write_urb_in_use = 1;
1248
1249 spin_unlock_irqrestore(&tport->tp_lock, flags);
1250
1251 usb_serial_debug_data(&port->dev, __func__, count,
1252 port->write_urb->transfer_buffer);
1253
1254 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1255 usb_sndbulkpipe(port->serial->dev,
1256 port->bulk_out_endpointAddress),
1257 port->write_urb->transfer_buffer, count,
1258 ti_bulk_out_callback, tport);
1259
1260 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1261 if (result) {
1262 dev_err_console(port, "%s - submit write urb failed, %d\n",
1263 __func__, result);
1264 tport->tp_write_urb_in_use = 0;
1265 /* TODO: reschedule ti_send */
1266 } else {
1267 spin_lock_irqsave(&tport->tp_lock, flags);
1268 tport->tp_icount.tx += count;
1269 spin_unlock_irqrestore(&tport->tp_lock, flags);
1270 }
1271
1272 /* more room in the buffer for new writes, wakeup */
1273 if (tty)
1274 tty_wakeup(tty);
1275 tty_kref_put(tty);
1276 wake_up_interruptible(&tport->tp_write_wait);
1277 return;
1278 unlock:
1279 spin_unlock_irqrestore(&tport->tp_lock, flags);
1280 tty_kref_put(tty);
1281 return;
1282 }
1283
1284
1285 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1286 {
1287 unsigned long flags;
1288 int status;
1289
1290 status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1291 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1292 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1293
1294 spin_lock_irqsave(&tport->tp_lock, flags);
1295 if (!status)
1296 tport->tp_shadow_mcr = mcr;
1297 spin_unlock_irqrestore(&tport->tp_lock, flags);
1298
1299 return status;
1300 }
1301
1302
1303 static int ti_get_lsr(struct ti_port *tport)
1304 {
1305 int size, status;
1306 struct ti_device *tdev = tport->tp_tdev;
1307 struct usb_serial_port *port = tport->tp_port;
1308 int port_number = port->number - port->serial->minor;
1309 struct ti_port_status *data;
1310
1311 size = sizeof(struct ti_port_status);
1312 data = kmalloc(size, GFP_KERNEL);
1313 if (!data) {
1314 dev_err(&port->dev, "%s - out of memory\n", __func__);
1315 return -ENOMEM;
1316 }
1317
1318 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1319 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1320 if (status) {
1321 dev_err(&port->dev,
1322 "%s - get port status command failed, %d\n",
1323 __func__, status);
1324 goto free_data;
1325 }
1326
1327 dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1328
1329 tport->tp_lsr = data->bLSR;
1330
1331 free_data:
1332 kfree(data);
1333 return status;
1334 }
1335
1336
1337 static int ti_get_serial_info(struct ti_port *tport,
1338 struct serial_struct __user *ret_arg)
1339 {
1340 struct usb_serial_port *port = tport->tp_port;
1341 struct serial_struct ret_serial;
1342
1343 if (!ret_arg)
1344 return -EFAULT;
1345
1346 memset(&ret_serial, 0, sizeof(ret_serial));
1347
1348 ret_serial.type = PORT_16550A;
1349 ret_serial.line = port->serial->minor;
1350 ret_serial.port = port->number - port->serial->minor;
1351 ret_serial.flags = tport->tp_flags;
1352 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1353 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1354 ret_serial.closing_wait = tport->tp_closing_wait;
1355
1356 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1357 return -EFAULT;
1358
1359 return 0;
1360 }
1361
1362
1363 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1364 struct serial_struct __user *new_arg)
1365 {
1366 struct serial_struct new_serial;
1367
1368 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1369 return -EFAULT;
1370
1371 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1372 tport->tp_closing_wait = new_serial.closing_wait;
1373
1374 return 0;
1375 }
1376
1377
1378 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1379 {
1380 struct async_icount *icount;
1381 struct tty_struct *tty;
1382 unsigned long flags;
1383
1384 dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1385
1386 if (msr & TI_MSR_DELTA_MASK) {
1387 spin_lock_irqsave(&tport->tp_lock, flags);
1388 icount = &tport->tp_icount;
1389 if (msr & TI_MSR_DELTA_CTS)
1390 icount->cts++;
1391 if (msr & TI_MSR_DELTA_DSR)
1392 icount->dsr++;
1393 if (msr & TI_MSR_DELTA_CD)
1394 icount->dcd++;
1395 if (msr & TI_MSR_DELTA_RI)
1396 icount->rng++;
1397 wake_up_interruptible(&tport->tp_port->delta_msr_wait);
1398 spin_unlock_irqrestore(&tport->tp_lock, flags);
1399 }
1400
1401 tport->tp_msr = msr & TI_MSR_MASK;
1402
1403 /* handle CTS flow control */
1404 tty = tty_port_tty_get(&tport->tp_port->port);
1405 if (tty && C_CRTSCTS(tty)) {
1406 if (msr & TI_MSR_CTS) {
1407 tty->hw_stopped = 0;
1408 tty_wakeup(tty);
1409 } else {
1410 tty->hw_stopped = 1;
1411 }
1412 }
1413 tty_kref_put(tty);
1414 }
1415
1416
1417 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1418 {
1419 struct ti_device *tdev = tport->tp_tdev;
1420 struct usb_serial_port *port = tport->tp_port;
1421 wait_queue_t wait;
1422
1423 spin_lock_irq(&tport->tp_lock);
1424
1425 /* wait for data to drain from the buffer */
1426 tdev->td_urb_error = 0;
1427 init_waitqueue_entry(&wait, current);
1428 add_wait_queue(&tport->tp_write_wait, &wait);
1429 for (;;) {
1430 set_current_state(TASK_INTERRUPTIBLE);
1431 if (kfifo_len(&tport->write_fifo) == 0
1432 || timeout == 0 || signal_pending(current)
1433 || tdev->td_urb_error
1434 || port->serial->disconnected) /* disconnect */
1435 break;
1436 spin_unlock_irq(&tport->tp_lock);
1437 timeout = schedule_timeout(timeout);
1438 spin_lock_irq(&tport->tp_lock);
1439 }
1440 set_current_state(TASK_RUNNING);
1441 remove_wait_queue(&tport->tp_write_wait, &wait);
1442
1443 /* flush any remaining data in the buffer */
1444 if (flush)
1445 kfifo_reset_out(&tport->write_fifo);
1446
1447 spin_unlock_irq(&tport->tp_lock);
1448
1449 mutex_lock(&port->serial->disc_mutex);
1450 /* wait for data to drain from the device */
1451 /* wait for empty tx register, plus 20 ms */
1452 timeout += jiffies;
1453 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1454 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1455 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1456 && !port->serial->disconnected) {
1457 if (ti_get_lsr(tport))
1458 break;
1459 mutex_unlock(&port->serial->disc_mutex);
1460 msleep_interruptible(20);
1461 mutex_lock(&port->serial->disc_mutex);
1462 }
1463 mutex_unlock(&port->serial->disc_mutex);
1464 }
1465
1466
1467 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1468 {
1469 unsigned long flags;
1470
1471 spin_lock_irqsave(&tport->tp_lock, flags);
1472
1473 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1474 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1475
1476 spin_unlock_irqrestore(&tport->tp_lock, flags);
1477 }
1478
1479
1480 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1481 {
1482 struct urb *urb;
1483 int status = 0;
1484 unsigned long flags;
1485
1486 spin_lock_irqsave(&tport->tp_lock, flags);
1487
1488 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1489 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1490 urb = tport->tp_port->read_urb;
1491 spin_unlock_irqrestore(&tport->tp_lock, flags);
1492 urb->context = tport;
1493 status = usb_submit_urb(urb, GFP_KERNEL);
1494 } else {
1495 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1496 spin_unlock_irqrestore(&tport->tp_lock, flags);
1497 }
1498
1499 return status;
1500 }
1501
1502
1503 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1504 __u16 moduleid, __u16 value, __u8 *data, int size)
1505 {
1506 int status;
1507
1508 status = usb_control_msg(tdev->td_serial->dev,
1509 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1510 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1511 value, moduleid, data, size, 1000);
1512
1513 if (status == size)
1514 status = 0;
1515
1516 if (status > 0)
1517 status = -ECOMM;
1518
1519 return status;
1520 }
1521
1522
1523 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1524 __u16 moduleid, __u16 value, __u8 *data, int size)
1525 {
1526 int status;
1527
1528 status = usb_control_msg(tdev->td_serial->dev,
1529 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1530 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1531 value, moduleid, data, size, 1000);
1532
1533 if (status == size)
1534 status = 0;
1535
1536 if (status > 0)
1537 status = -ECOMM;
1538
1539 return status;
1540 }
1541
1542
1543 static int ti_write_byte(struct usb_serial_port *port,
1544 struct ti_device *tdev, unsigned long addr,
1545 __u8 mask, __u8 byte)
1546 {
1547 int status;
1548 unsigned int size;
1549 struct ti_write_data_bytes *data;
1550
1551 dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1552 addr, mask, byte);
1553
1554 size = sizeof(struct ti_write_data_bytes) + 2;
1555 data = kmalloc(size, GFP_KERNEL);
1556 if (!data) {
1557 dev_err(&port->dev, "%s - out of memory\n", __func__);
1558 return -ENOMEM;
1559 }
1560
1561 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1562 data->bDataType = TI_RW_DATA_BYTE;
1563 data->bDataCounter = 1;
1564 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1565 data->wBaseAddrLo = cpu_to_be16(addr);
1566 data->bData[0] = mask;
1567 data->bData[1] = byte;
1568
1569 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1570 (__u8 *)data, size);
1571
1572 if (status < 0)
1573 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1574
1575 kfree(data);
1576
1577 return status;
1578 }
1579
1580 static int ti_do_download(struct usb_device *dev, int pipe,
1581 u8 *buffer, int size)
1582 {
1583 int pos;
1584 u8 cs = 0;
1585 int done;
1586 struct ti_firmware_header *header;
1587 int status = 0;
1588 int len;
1589
1590 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1591 cs = (__u8)(cs + buffer[pos]);
1592
1593 header = (struct ti_firmware_header *)buffer;
1594 header->wLength = cpu_to_le16((__u16)(size
1595 - sizeof(struct ti_firmware_header)));
1596 header->bCheckSum = cs;
1597
1598 dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1599 for (pos = 0; pos < size; pos += done) {
1600 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1601 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1602 &done, 1000);
1603 if (status)
1604 break;
1605 }
1606 return status;
1607 }
1608
1609 static int ti_download_firmware(struct ti_device *tdev)
1610 {
1611 int status;
1612 int buffer_size;
1613 __u8 *buffer;
1614 struct usb_device *dev = tdev->td_serial->dev;
1615 unsigned int pipe = usb_sndbulkpipe(dev,
1616 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1617 const struct firmware *fw_p;
1618 char buf[32];
1619
1620 /* try ID specific firmware first, then try generic firmware */
1621 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1622 dev->descriptor.idProduct);
1623 status = request_firmware(&fw_p, buf, &dev->dev);
1624
1625 if (status != 0) {
1626 buf[0] = '\0';
1627 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1628 switch (dev->descriptor.idProduct) {
1629 case MTS_CDMA_PRODUCT_ID:
1630 strcpy(buf, "mts_cdma.fw");
1631 break;
1632 case MTS_GSM_PRODUCT_ID:
1633 strcpy(buf, "mts_gsm.fw");
1634 break;
1635 case MTS_EDGE_PRODUCT_ID:
1636 strcpy(buf, "mts_edge.fw");
1637 break;
1638 case MTS_MT9234MU_PRODUCT_ID:
1639 strcpy(buf, "mts_mt9234mu.fw");
1640 break;
1641 case MTS_MT9234ZBA_PRODUCT_ID:
1642 strcpy(buf, "mts_mt9234zba.fw");
1643 break;
1644 case MTS_MT9234ZBAOLD_PRODUCT_ID:
1645 strcpy(buf, "mts_mt9234zba.fw");
1646 break; }
1647 }
1648 if (buf[0] == '\0') {
1649 if (tdev->td_is_3410)
1650 strcpy(buf, "ti_3410.fw");
1651 else
1652 strcpy(buf, "ti_5052.fw");
1653 }
1654 status = request_firmware(&fw_p, buf, &dev->dev);
1655 }
1656 if (status) {
1657 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1658 return -ENOENT;
1659 }
1660 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1661 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1662 release_firmware(fw_p);
1663 return -ENOENT;
1664 }
1665
1666 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1667 buffer = kmalloc(buffer_size, GFP_KERNEL);
1668 if (buffer) {
1669 memcpy(buffer, fw_p->data, fw_p->size);
1670 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1671 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1672 kfree(buffer);
1673 } else {
1674 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1675 status = -ENOMEM;
1676 }
1677 release_firmware(fw_p);
1678 if (status) {
1679 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1680 __func__, status);
1681 return status;
1682 }
1683
1684 dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1685
1686 return 0;
1687 }
kernel source for telekom puls (alcatel/mediatek)