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Merge branch 'drm-vmware-next' into drm-core-next
[linux-2.6/libata-dev.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob90979a1f5311e0000788a3c343ab2e9b0e3bbacf
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, struct file *file,
110 unsigned int cmd, unsigned long arg);
111 static void ti_set_termios(struct tty_struct *tty,
112 struct usb_serial_port *port, struct ktermios *old_termios);
113 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
114 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
115 unsigned int set, unsigned int clear);
116 static void ti_break(struct tty_struct *tty, int break_state);
117 static void ti_interrupt_callback(struct urb *urb);
118 static void ti_bulk_in_callback(struct urb *urb);
119 static void ti_bulk_out_callback(struct urb *urb);
120
121 static void ti_recv(struct device *dev, struct tty_struct *tty,
122 unsigned char *data, int length);
123 static void ti_send(struct ti_port *tport);
124 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
125 static int ti_get_lsr(struct ti_port *tport);
126 static int ti_get_serial_info(struct ti_port *tport,
127 struct serial_struct __user *ret_arg);
128 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
129 struct serial_struct __user *new_arg);
130 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
131
132 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
133
134 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
135 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
136
137 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
138 __u16 moduleid, __u16 value, __u8 *data, int size);
139 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
140 __u16 moduleid, __u16 value, __u8 *data, int size);
141
142 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
143 __u8 mask, __u8 byte);
144
145 static int ti_download_firmware(struct ti_device *tdev);
146
147
148 /* Data */
149
150 /* module parameters */
151 static int debug;
152 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
153 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
154 static unsigned int vendor_3410_count;
155 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
156 static unsigned int product_3410_count;
157 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
158 static unsigned int vendor_5052_count;
159 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
160 static unsigned int product_5052_count;
161
162 /* supported devices */
163 /* the array dimension is the number of default entries plus */
164 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
165 /* null entry */
166 static struct usb_device_id ti_id_table_3410[13+TI_EXTRA_VID_PID_COUNT+1] = {
167 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
168 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
169 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
170 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
171 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
172 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
173 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
174 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
175 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
176 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
177 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
178 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
179 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
180 };
181
182 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
183 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
184 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
185 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
186 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
187 };
188
189 static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
190 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
191 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
192 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
193 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
194 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
195 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
196 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
197 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
198 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
199 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
200 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
201 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
202 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
203 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
204 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
205 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
206 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
207 { }
208 };
209
210 static struct usb_driver ti_usb_driver = {
211 .name = "ti_usb_3410_5052",
212 .probe = usb_serial_probe,
213 .disconnect = usb_serial_disconnect,
214 .id_table = ti_id_table_combined,
215 .no_dynamic_id = 1,
216 };
217
218 static struct usb_serial_driver ti_1port_device = {
219 .driver = {
220 .owner = THIS_MODULE,
221 .name = "ti_usb_3410_5052_1",
222 },
223 .description = "TI USB 3410 1 port adapter",
224 .usb_driver = &ti_usb_driver,
225 .id_table = ti_id_table_3410,
226 .num_ports = 1,
227 .attach = ti_startup,
228 .release = ti_release,
229 .open = ti_open,
230 .close = ti_close,
231 .write = ti_write,
232 .write_room = ti_write_room,
233 .chars_in_buffer = ti_chars_in_buffer,
234 .throttle = ti_throttle,
235 .unthrottle = ti_unthrottle,
236 .ioctl = ti_ioctl,
237 .set_termios = ti_set_termios,
238 .tiocmget = ti_tiocmget,
239 .tiocmset = ti_tiocmset,
240 .break_ctl = ti_break,
241 .read_int_callback = ti_interrupt_callback,
242 .read_bulk_callback = ti_bulk_in_callback,
243 .write_bulk_callback = ti_bulk_out_callback,
244 };
245
246 static struct usb_serial_driver ti_2port_device = {
247 .driver = {
248 .owner = THIS_MODULE,
249 .name = "ti_usb_3410_5052_2",
250 },
251 .description = "TI USB 5052 2 port adapter",
252 .usb_driver = &ti_usb_driver,
253 .id_table = ti_id_table_5052,
254 .num_ports = 2,
255 .attach = ti_startup,
256 .release = ti_release,
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 .break_ctl = ti_break,
269 .read_int_callback = ti_interrupt_callback,
270 .read_bulk_callback = ti_bulk_in_callback,
271 .write_bulk_callback = ti_bulk_out_callback,
272 };
273
274
275 /* Module */
276
277 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
278 MODULE_DESCRIPTION(TI_DRIVER_DESC);
279 MODULE_VERSION(TI_DRIVER_VERSION);
280 MODULE_LICENSE("GPL");
281
282 MODULE_FIRMWARE("ti_3410.fw");
283 MODULE_FIRMWARE("ti_5052.fw");
284 MODULE_FIRMWARE("mts_cdma.fw");
285 MODULE_FIRMWARE("mts_gsm.fw");
286 MODULE_FIRMWARE("mts_edge.fw");
287 MODULE_FIRMWARE("mts_mt9234mu.fw");
288 MODULE_FIRMWARE("mts_mt9234zba.fw");
289
290 module_param(debug, bool, S_IRUGO | S_IWUSR);
291 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
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 int ret;
319
320 /* insert extra vendor and product ids */
321 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
322 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
323 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
324 ti_id_table_3410[j].idVendor = vendor_3410[i];
325 ti_id_table_3410[j].idProduct = product_3410[i];
326 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
327 ti_id_table_combined[c].idVendor = vendor_3410[i];
328 ti_id_table_combined[c].idProduct = product_3410[i];
329 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
330 }
331 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
332 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
333 ti_id_table_5052[j].idVendor = vendor_5052[i];
334 ti_id_table_5052[j].idProduct = product_5052[i];
335 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
336 ti_id_table_combined[c].idVendor = vendor_5052[i];
337 ti_id_table_combined[c].idProduct = product_5052[i];
338 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
339 }
340
341 ret = usb_serial_register(&ti_1port_device);
342 if (ret)
343 goto failed_1port;
344 ret = usb_serial_register(&ti_2port_device);
345 if (ret)
346 goto failed_2port;
347
348 ret = usb_register(&ti_usb_driver);
349 if (ret)
350 goto failed_usb;
351
352 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
353 TI_DRIVER_DESC "\n");
354
355 return 0;
356
357 failed_usb:
358 usb_serial_deregister(&ti_2port_device);
359 failed_2port:
360 usb_serial_deregister(&ti_1port_device);
361 failed_1port:
362 return ret;
363 }
364
365
366 static void __exit ti_exit(void)
367 {
368 usb_serial_deregister(&ti_1port_device);
369 usb_serial_deregister(&ti_2port_device);
370 usb_deregister(&ti_usb_driver);
371 }
372
373
374 module_init(ti_init);
375 module_exit(ti_exit);
376
377
378 static int ti_startup(struct usb_serial *serial)
379 {
380 struct ti_device *tdev;
381 struct ti_port *tport;
382 struct usb_device *dev = serial->dev;
383 int status;
384 int i;
385
386
387 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
388 __func__, le16_to_cpu(dev->descriptor.idProduct),
389 dev->descriptor.bNumConfigurations,
390 dev->actconfig->desc.bConfigurationValue);
391
392 /* create device structure */
393 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
394 if (tdev == NULL) {
395 dev_err(&dev->dev, "%s - out of memory\n", __func__);
396 return -ENOMEM;
397 }
398 mutex_init(&tdev->td_open_close_lock);
399 tdev->td_serial = serial;
400 usb_set_serial_data(serial, tdev);
401
402 /* determine device type */
403 if (usb_match_id(serial->interface, ti_id_table_3410))
404 tdev->td_is_3410 = 1;
405 dbg("%s - device type is %s", __func__,
406 tdev->td_is_3410 ? "3410" : "5052");
407
408 /* if we have only 1 configuration, download firmware */
409 if (dev->descriptor.bNumConfigurations == 1) {
410 if ((status = ti_download_firmware(tdev)) != 0)
411 goto free_tdev;
412
413 /* 3410 must be reset, 5052 resets itself */
414 if (tdev->td_is_3410) {
415 msleep_interruptible(100);
416 usb_reset_device(dev);
417 }
418
419 status = -ENODEV;
420 goto free_tdev;
421 }
422
423 /* the second configuration must be set */
424 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
425 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
426 status = status ? status : -ENODEV;
427 goto free_tdev;
428 }
429
430 /* set up port structures */
431 for (i = 0; i < serial->num_ports; ++i) {
432 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
433 if (tport == NULL) {
434 dev_err(&dev->dev, "%s - out of memory\n", __func__);
435 status = -ENOMEM;
436 goto free_tports;
437 }
438 spin_lock_init(&tport->tp_lock);
439 tport->tp_uart_base_addr = (i == 0 ?
440 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
441 tport->tp_closing_wait = closing_wait;
442 init_waitqueue_head(&tport->tp_msr_wait);
443 init_waitqueue_head(&tport->tp_write_wait);
444 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
445 GFP_KERNEL)) {
446 dev_err(&dev->dev, "%s - out of memory\n", __func__);
447 kfree(tport);
448 status = -ENOMEM;
449 goto free_tports;
450 }
451 tport->tp_port = serial->port[i];
452 tport->tp_tdev = tdev;
453 usb_set_serial_port_data(serial->port[i], tport);
454 tport->tp_uart_mode = 0; /* default is RS232 */
455 }
456
457 return 0;
458
459 free_tports:
460 for (--i; i >= 0; --i) {
461 tport = usb_get_serial_port_data(serial->port[i]);
462 kfifo_free(&tport->write_fifo);
463 kfree(tport);
464 usb_set_serial_port_data(serial->port[i], NULL);
465 }
466 free_tdev:
467 kfree(tdev);
468 usb_set_serial_data(serial, NULL);
469 return status;
470 }
471
472
473 static void ti_release(struct usb_serial *serial)
474 {
475 int i;
476 struct ti_device *tdev = usb_get_serial_data(serial);
477 struct ti_port *tport;
478
479 dbg("%s", __func__);
480
481 for (i = 0; i < serial->num_ports; ++i) {
482 tport = usb_get_serial_port_data(serial->port[i]);
483 if (tport) {
484 kfifo_free(&tport->write_fifo);
485 kfree(tport);
486 }
487 }
488
489 kfree(tdev);
490 }
491
492
493 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
494 {
495 struct ti_port *tport = usb_get_serial_port_data(port);
496 struct ti_device *tdev;
497 struct usb_device *dev;
498 struct urb *urb;
499 int port_number;
500 int status;
501 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
502 TI_PIPE_TIMEOUT_ENABLE |
503 (TI_TRANSFER_TIMEOUT << 2));
504
505 dbg("%s - port %d", __func__, port->number);
506
507 if (tport == NULL)
508 return -ENODEV;
509
510 dev = port->serial->dev;
511 tdev = tport->tp_tdev;
512
513 /* only one open on any port on a device at a time */
514 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
515 return -ERESTARTSYS;
516
517 port_number = port->number - port->serial->minor;
518
519 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
520
521 tport->tp_msr = 0;
522 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
523
524 /* start interrupt urb the first time a port is opened on this device */
525 if (tdev->td_open_port_count == 0) {
526 dbg("%s - start interrupt in urb", __func__);
527 urb = tdev->td_serial->port[0]->interrupt_in_urb;
528 if (!urb) {
529 dev_err(&port->dev, "%s - no interrupt urb\n",
530 __func__);
531 status = -EINVAL;
532 goto release_lock;
533 }
534 urb->complete = ti_interrupt_callback;
535 urb->context = tdev;
536 urb->dev = dev;
537 status = usb_submit_urb(urb, GFP_KERNEL);
538 if (status) {
539 dev_err(&port->dev,
540 "%s - submit interrupt urb failed, %d\n",
541 __func__, status);
542 goto release_lock;
543 }
544 }
545
546 if (tty)
547 ti_set_termios(tty, port, tty->termios);
548
549 dbg("%s - sending TI_OPEN_PORT", __func__);
550 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
551 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
552 if (status) {
553 dev_err(&port->dev, "%s - cannot send open command, %d\n",
554 __func__, status);
555 goto unlink_int_urb;
556 }
557
558 dbg("%s - sending TI_START_PORT", __func__);
559 status = ti_command_out_sync(tdev, TI_START_PORT,
560 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
561 if (status) {
562 dev_err(&port->dev, "%s - cannot send start command, %d\n",
563 __func__, status);
564 goto unlink_int_urb;
565 }
566
567 dbg("%s - sending TI_PURGE_PORT", __func__);
568 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
569 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
570 if (status) {
571 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
572 __func__, status);
573 goto unlink_int_urb;
574 }
575 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
576 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
577 if (status) {
578 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
579 __func__, status);
580 goto unlink_int_urb;
581 }
582
583 /* reset the data toggle on the bulk endpoints to work around bug in
584 * host controllers where things get out of sync some times */
585 usb_clear_halt(dev, port->write_urb->pipe);
586 usb_clear_halt(dev, port->read_urb->pipe);
587
588 if (tty)
589 ti_set_termios(tty, port, tty->termios);
590
591 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
592 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
593 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
594 if (status) {
595 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
596 __func__, status);
597 goto unlink_int_urb;
598 }
599
600 dbg("%s - sending TI_START_PORT (2)", __func__);
601 status = ti_command_out_sync(tdev, TI_START_PORT,
602 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
603 if (status) {
604 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
605 __func__, status);
606 goto unlink_int_urb;
607 }
608
609 /* start read urb */
610 dbg("%s - start read urb", __func__);
611 urb = port->read_urb;
612 if (!urb) {
613 dev_err(&port->dev, "%s - no read urb\n", __func__);
614 status = -EINVAL;
615 goto unlink_int_urb;
616 }
617 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
618 urb->complete = ti_bulk_in_callback;
619 urb->context = tport;
620 urb->dev = dev;
621 status = usb_submit_urb(urb, GFP_KERNEL);
622 if (status) {
623 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
624 __func__, status);
625 goto unlink_int_urb;
626 }
627
628 tport->tp_is_open = 1;
629 ++tdev->td_open_port_count;
630
631 goto release_lock;
632
633 unlink_int_urb:
634 if (tdev->td_open_port_count == 0)
635 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
636 release_lock:
637 mutex_unlock(&tdev->td_open_close_lock);
638 dbg("%s - exit %d", __func__, status);
639 return status;
640 }
641
642
643 static void ti_close(struct usb_serial_port *port)
644 {
645 struct ti_device *tdev;
646 struct ti_port *tport;
647 int port_number;
648 int status;
649 int do_unlock;
650
651 dbg("%s - port %d", __func__, port->number);
652
653 tdev = usb_get_serial_data(port->serial);
654 tport = usb_get_serial_port_data(port);
655 if (tdev == NULL || tport == NULL)
656 return;
657
658 tport->tp_is_open = 0;
659
660 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
661
662 usb_kill_urb(port->read_urb);
663 usb_kill_urb(port->write_urb);
664 tport->tp_write_urb_in_use = 0;
665
666 port_number = port->number - port->serial->minor;
667
668 dbg("%s - sending TI_CLOSE_PORT", __func__);
669 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
670 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
671 if (status)
672 dev_err(&port->dev,
673 "%s - cannot send close port command, %d\n"
674 , __func__, status);
675
676 /* if mutex_lock is interrupted, continue anyway */
677 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
678 --tport->tp_tdev->td_open_port_count;
679 if (tport->tp_tdev->td_open_port_count <= 0) {
680 /* last port is closed, shut down interrupt urb */
681 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
682 tport->tp_tdev->td_open_port_count = 0;
683 }
684 if (do_unlock)
685 mutex_unlock(&tdev->td_open_close_lock);
686
687 dbg("%s - exit", __func__);
688 }
689
690
691 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
692 const unsigned char *data, int count)
693 {
694 struct ti_port *tport = usb_get_serial_port_data(port);
695
696 dbg("%s - port %d", __func__, port->number);
697
698 if (count == 0) {
699 dbg("%s - write request of 0 bytes", __func__);
700 return 0;
701 }
702
703 if (tport == NULL || !tport->tp_is_open)
704 return -ENODEV;
705
706 count = kfifo_in_locked(&tport->write_fifo, data, count,
707 &tport->tp_lock);
708 ti_send(tport);
709
710 return count;
711 }
712
713
714 static int ti_write_room(struct tty_struct *tty)
715 {
716 struct usb_serial_port *port = tty->driver_data;
717 struct ti_port *tport = usb_get_serial_port_data(port);
718 int room = 0;
719 unsigned long flags;
720
721 dbg("%s - port %d", __func__, port->number);
722
723 if (tport == NULL)
724 return 0;
725
726 spin_lock_irqsave(&tport->tp_lock, flags);
727 room = kfifo_avail(&tport->write_fifo);
728 spin_unlock_irqrestore(&tport->tp_lock, flags);
729
730 dbg("%s - returns %d", __func__, room);
731 return room;
732 }
733
734
735 static int ti_chars_in_buffer(struct tty_struct *tty)
736 {
737 struct usb_serial_port *port = tty->driver_data;
738 struct ti_port *tport = usb_get_serial_port_data(port);
739 int chars = 0;
740 unsigned long flags;
741
742 dbg("%s - port %d", __func__, port->number);
743
744 if (tport == NULL)
745 return 0;
746
747 spin_lock_irqsave(&tport->tp_lock, flags);
748 chars = kfifo_len(&tport->write_fifo);
749 spin_unlock_irqrestore(&tport->tp_lock, flags);
750
751 dbg("%s - returns %d", __func__, chars);
752 return chars;
753 }
754
755
756 static void ti_throttle(struct tty_struct *tty)
757 {
758 struct usb_serial_port *port = tty->driver_data;
759 struct ti_port *tport = usb_get_serial_port_data(port);
760
761 dbg("%s - port %d", __func__, port->number);
762
763 if (tport == NULL)
764 return;
765
766 if (I_IXOFF(tty) || C_CRTSCTS(tty))
767 ti_stop_read(tport, tty);
768
769 }
770
771
772 static void ti_unthrottle(struct tty_struct *tty)
773 {
774 struct usb_serial_port *port = tty->driver_data;
775 struct ti_port *tport = usb_get_serial_port_data(port);
776 int status;
777
778 dbg("%s - port %d", __func__, port->number);
779
780 if (tport == NULL)
781 return;
782
783 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
784 status = ti_restart_read(tport, tty);
785 if (status)
786 dev_err(&port->dev, "%s - cannot restart read, %d\n",
787 __func__, status);
788 }
789 }
790
791
792 static int ti_ioctl(struct tty_struct *tty, struct file *file,
793 unsigned int cmd, unsigned long arg)
794 {
795 struct usb_serial_port *port = tty->driver_data;
796 struct ti_port *tport = usb_get_serial_port_data(port);
797 struct async_icount cnow;
798 struct async_icount cprev;
799
800 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
801
802 if (tport == NULL)
803 return -ENODEV;
804
805 switch (cmd) {
806 case TIOCGSERIAL:
807 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
808 return ti_get_serial_info(tport,
809 (struct serial_struct __user *)arg);
810 case TIOCSSERIAL:
811 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
812 return ti_set_serial_info(tty, tport,
813 (struct serial_struct __user *)arg);
814 case TIOCMIWAIT:
815 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
816 cprev = tport->tp_icount;
817 while (1) {
818 interruptible_sleep_on(&tport->tp_msr_wait);
819 if (signal_pending(current))
820 return -ERESTARTSYS;
821 cnow = tport->tp_icount;
822 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
823 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
824 return -EIO; /* no change => error */
825 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
826 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
827 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
828 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
829 return 0;
830 cprev = cnow;
831 }
832 break;
833 case TIOCGICOUNT:
834 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
835 __func__, port->number,
836 tport->tp_icount.rx, tport->tp_icount.tx);
837 if (copy_to_user((void __user *)arg, &tport->tp_icount,
838 sizeof(tport->tp_icount)))
839 return -EFAULT;
840 return 0;
841 }
842 return -ENOIOCTLCMD;
843 }
844
845
846 static void ti_set_termios(struct tty_struct *tty,
847 struct usb_serial_port *port, struct ktermios *old_termios)
848 {
849 struct ti_port *tport = usb_get_serial_port_data(port);
850 struct ti_uart_config *config;
851 tcflag_t cflag, iflag;
852 int baud;
853 int status;
854 int port_number = port->number - port->serial->minor;
855 unsigned int mcr;
856
857 dbg("%s - port %d", __func__, port->number);
858
859 cflag = tty->termios->c_cflag;
860 iflag = tty->termios->c_iflag;
861
862 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
863 dbg("%s - old clfag %08x, old iflag %08x", __func__,
864 old_termios->c_cflag, old_termios->c_iflag);
865
866 if (tport == NULL)
867 return;
868
869 config = kmalloc(sizeof(*config), GFP_KERNEL);
870 if (!config) {
871 dev_err(&port->dev, "%s - out of memory\n", __func__);
872 return;
873 }
874
875 config->wFlags = 0;
876
877 /* these flags must be set */
878 config->wFlags |= TI_UART_ENABLE_MS_INTS;
879 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
880 config->bUartMode = (__u8)(tport->tp_uart_mode);
881
882 switch (cflag & CSIZE) {
883 case CS5:
884 config->bDataBits = TI_UART_5_DATA_BITS;
885 break;
886 case CS6:
887 config->bDataBits = TI_UART_6_DATA_BITS;
888 break;
889 case CS7:
890 config->bDataBits = TI_UART_7_DATA_BITS;
891 break;
892 default:
893 case CS8:
894 config->bDataBits = TI_UART_8_DATA_BITS;
895 break;
896 }
897
898 /* CMSPAR isn't supported by this driver */
899 tty->termios->c_cflag &= ~CMSPAR;
900
901 if (cflag & PARENB) {
902 if (cflag & PARODD) {
903 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
904 config->bParity = TI_UART_ODD_PARITY;
905 } else {
906 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
907 config->bParity = TI_UART_EVEN_PARITY;
908 }
909 } else {
910 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
911 config->bParity = TI_UART_NO_PARITY;
912 }
913
914 if (cflag & CSTOPB)
915 config->bStopBits = TI_UART_2_STOP_BITS;
916 else
917 config->bStopBits = TI_UART_1_STOP_BITS;
918
919 if (cflag & CRTSCTS) {
920 /* RTS flow control must be off to drop RTS for baud rate B0 */
921 if ((cflag & CBAUD) != B0)
922 config->wFlags |= TI_UART_ENABLE_RTS_IN;
923 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
924 } else {
925 tty->hw_stopped = 0;
926 ti_restart_read(tport, tty);
927 }
928
929 if (I_IXOFF(tty) || I_IXON(tty)) {
930 config->cXon = START_CHAR(tty);
931 config->cXoff = STOP_CHAR(tty);
932
933 if (I_IXOFF(tty))
934 config->wFlags |= TI_UART_ENABLE_X_IN;
935 else
936 ti_restart_read(tport, tty);
937
938 if (I_IXON(tty))
939 config->wFlags |= TI_UART_ENABLE_X_OUT;
940 }
941
942 baud = tty_get_baud_rate(tty);
943 if (!baud)
944 baud = 9600;
945 if (tport->tp_tdev->td_is_3410)
946 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
947 else
948 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
949
950 /* FIXME: Should calculate resulting baud here and report it back */
951 if ((cflag & CBAUD) != B0)
952 tty_encode_baud_rate(tty, baud, baud);
953
954 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
955 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
956
957 cpu_to_be16s(&config->wBaudRate);
958 cpu_to_be16s(&config->wFlags);
959
960 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
961 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
962 sizeof(*config));
963 if (status)
964 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
965 __func__, port_number, status);
966
967 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
968 mcr = tport->tp_shadow_mcr;
969 /* if baud rate is B0, clear RTS and DTR */
970 if ((cflag & CBAUD) == B0)
971 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
972 status = ti_set_mcr(tport, mcr);
973 if (status)
974 dev_err(&port->dev,
975 "%s - cannot set modem control on port %d, %d\n",
976 __func__, port_number, status);
977
978 kfree(config);
979 }
980
981
982 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
983 {
984 struct usb_serial_port *port = tty->driver_data;
985 struct ti_port *tport = usb_get_serial_port_data(port);
986 unsigned int result;
987 unsigned int msr;
988 unsigned int mcr;
989 unsigned long flags;
990
991 dbg("%s - port %d", __func__, port->number);
992
993 if (tport == NULL)
994 return -ENODEV;
995
996 spin_lock_irqsave(&tport->tp_lock, flags);
997 msr = tport->tp_msr;
998 mcr = tport->tp_shadow_mcr;
999 spin_unlock_irqrestore(&tport->tp_lock, flags);
1000
1001 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1002 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1003 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1004 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1005 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1006 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1007 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1008
1009 dbg("%s - 0x%04X", __func__, result);
1010
1011 return result;
1012 }
1013
1014
1015 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1016 unsigned int set, unsigned int clear)
1017 {
1018 struct usb_serial_port *port = tty->driver_data;
1019 struct ti_port *tport = usb_get_serial_port_data(port);
1020 unsigned int mcr;
1021 unsigned long flags;
1022
1023 dbg("%s - port %d", __func__, port->number);
1024
1025 if (tport == NULL)
1026 return -ENODEV;
1027
1028 spin_lock_irqsave(&tport->tp_lock, flags);
1029 mcr = tport->tp_shadow_mcr;
1030
1031 if (set & TIOCM_RTS)
1032 mcr |= TI_MCR_RTS;
1033 if (set & TIOCM_DTR)
1034 mcr |= TI_MCR_DTR;
1035 if (set & TIOCM_LOOP)
1036 mcr |= TI_MCR_LOOP;
1037
1038 if (clear & TIOCM_RTS)
1039 mcr &= ~TI_MCR_RTS;
1040 if (clear & TIOCM_DTR)
1041 mcr &= ~TI_MCR_DTR;
1042 if (clear & TIOCM_LOOP)
1043 mcr &= ~TI_MCR_LOOP;
1044 spin_unlock_irqrestore(&tport->tp_lock, flags);
1045
1046 return ti_set_mcr(tport, mcr);
1047 }
1048
1049
1050 static void ti_break(struct tty_struct *tty, int break_state)
1051 {
1052 struct usb_serial_port *port = tty->driver_data;
1053 struct ti_port *tport = usb_get_serial_port_data(port);
1054 int status;
1055
1056 dbg("%s - state = %d", __func__, break_state);
1057
1058 if (tport == NULL)
1059 return;
1060
1061 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1062
1063 status = ti_write_byte(tport->tp_tdev,
1064 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1065 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1066
1067 if (status)
1068 dbg("%s - error setting break, %d", __func__, status);
1069 }
1070
1071
1072 static void ti_interrupt_callback(struct urb *urb)
1073 {
1074 struct ti_device *tdev = urb->context;
1075 struct usb_serial_port *port;
1076 struct usb_serial *serial = tdev->td_serial;
1077 struct ti_port *tport;
1078 struct device *dev = &urb->dev->dev;
1079 unsigned char *data = urb->transfer_buffer;
1080 int length = urb->actual_length;
1081 int port_number;
1082 int function;
1083 int status = urb->status;
1084 int retval;
1085 __u8 msr;
1086
1087 dbg("%s", __func__);
1088
1089 switch (status) {
1090 case 0:
1091 break;
1092 case -ECONNRESET:
1093 case -ENOENT:
1094 case -ESHUTDOWN:
1095 dbg("%s - urb shutting down, %d", __func__, status);
1096 tdev->td_urb_error = 1;
1097 return;
1098 default:
1099 dev_err(dev, "%s - nonzero urb status, %d\n",
1100 __func__, status);
1101 tdev->td_urb_error = 1;
1102 goto exit;
1103 }
1104
1105 if (length != 2) {
1106 dbg("%s - bad packet size, %d", __func__, length);
1107 goto exit;
1108 }
1109
1110 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1111 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1112 goto exit;
1113 }
1114
1115 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1116 function = TI_GET_FUNC_FROM_CODE(data[0]);
1117
1118 dbg("%s - port_number %d, function %d, data 0x%02X",
1119 __func__, port_number, function, data[1]);
1120
1121 if (port_number >= serial->num_ports) {
1122 dev_err(dev, "%s - bad port number, %d\n",
1123 __func__, port_number);
1124 goto exit;
1125 }
1126
1127 port = serial->port[port_number];
1128
1129 tport = usb_get_serial_port_data(port);
1130 if (!tport)
1131 goto exit;
1132
1133 switch (function) {
1134 case TI_CODE_DATA_ERROR:
1135 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1136 __func__, port_number, data[1]);
1137 break;
1138
1139 case TI_CODE_MODEM_STATUS:
1140 msr = data[1];
1141 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1142 ti_handle_new_msr(tport, msr);
1143 break;
1144
1145 default:
1146 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1147 __func__, data[1]);
1148 break;
1149 }
1150
1151 exit:
1152 retval = usb_submit_urb(urb, GFP_ATOMIC);
1153 if (retval)
1154 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1155 __func__, retval);
1156 }
1157
1158
1159 static void ti_bulk_in_callback(struct urb *urb)
1160 {
1161 struct ti_port *tport = urb->context;
1162 struct usb_serial_port *port = tport->tp_port;
1163 struct device *dev = &urb->dev->dev;
1164 int status = urb->status;
1165 int retval = 0;
1166 struct tty_struct *tty;
1167
1168 dbg("%s", __func__);
1169
1170 switch (status) {
1171 case 0:
1172 break;
1173 case -ECONNRESET:
1174 case -ENOENT:
1175 case -ESHUTDOWN:
1176 dbg("%s - urb shutting down, %d", __func__, status);
1177 tport->tp_tdev->td_urb_error = 1;
1178 wake_up_interruptible(&tport->tp_write_wait);
1179 return;
1180 default:
1181 dev_err(dev, "%s - nonzero urb status, %d\n",
1182 __func__, status);
1183 tport->tp_tdev->td_urb_error = 1;
1184 wake_up_interruptible(&tport->tp_write_wait);
1185 }
1186
1187 if (status == -EPIPE)
1188 goto exit;
1189
1190 if (status) {
1191 dev_err(dev, "%s - stopping read!\n", __func__);
1192 return;
1193 }
1194
1195 tty = tty_port_tty_get(&port->port);
1196 if (tty) {
1197 if (urb->actual_length) {
1198 usb_serial_debug_data(debug, dev, __func__,
1199 urb->actual_length, urb->transfer_buffer);
1200
1201 if (!tport->tp_is_open)
1202 dbg("%s - port closed, dropping data",
1203 __func__);
1204 else
1205 ti_recv(&urb->dev->dev, tty,
1206 urb->transfer_buffer,
1207 urb->actual_length);
1208 spin_lock(&tport->tp_lock);
1209 tport->tp_icount.rx += urb->actual_length;
1210 spin_unlock(&tport->tp_lock);
1211 }
1212 tty_kref_put(tty);
1213 }
1214
1215 exit:
1216 /* continue to read unless stopping */
1217 spin_lock(&tport->tp_lock);
1218 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1219 urb->dev = port->serial->dev;
1220 retval = usb_submit_urb(urb, GFP_ATOMIC);
1221 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1222 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1223 }
1224 spin_unlock(&tport->tp_lock);
1225 if (retval)
1226 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1227 __func__, retval);
1228 }
1229
1230
1231 static void ti_bulk_out_callback(struct urb *urb)
1232 {
1233 struct ti_port *tport = urb->context;
1234 struct usb_serial_port *port = tport->tp_port;
1235 struct device *dev = &urb->dev->dev;
1236 int status = urb->status;
1237
1238 dbg("%s - port %d", __func__, port->number);
1239
1240 tport->tp_write_urb_in_use = 0;
1241
1242 switch (status) {
1243 case 0:
1244 break;
1245 case -ECONNRESET:
1246 case -ENOENT:
1247 case -ESHUTDOWN:
1248 dbg("%s - urb shutting down, %d", __func__, status);
1249 tport->tp_tdev->td_urb_error = 1;
1250 wake_up_interruptible(&tport->tp_write_wait);
1251 return;
1252 default:
1253 dev_err(dev, "%s - nonzero urb status, %d\n",
1254 __func__, status);
1255 tport->tp_tdev->td_urb_error = 1;
1256 wake_up_interruptible(&tport->tp_write_wait);
1257 }
1258
1259 /* send any buffered data */
1260 ti_send(tport);
1261 }
1262
1263
1264 static void ti_recv(struct device *dev, struct tty_struct *tty,
1265 unsigned char *data, int length)
1266 {
1267 int cnt;
1268
1269 do {
1270 cnt = tty_insert_flip_string(tty, data, length);
1271 if (cnt < length) {
1272 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1273 __func__, length - cnt);
1274 if (cnt == 0)
1275 break;
1276 }
1277 tty_flip_buffer_push(tty);
1278 data += cnt;
1279 length -= cnt;
1280 } while (length > 0);
1281
1282 }
1283
1284
1285 static void ti_send(struct ti_port *tport)
1286 {
1287 int count, result;
1288 struct usb_serial_port *port = tport->tp_port;
1289 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1290 unsigned long flags;
1291
1292
1293 dbg("%s - port %d", __func__, port->number);
1294
1295 spin_lock_irqsave(&tport->tp_lock, flags);
1296
1297 if (tport->tp_write_urb_in_use)
1298 goto unlock;
1299
1300 count = kfifo_out(&tport->write_fifo,
1301 port->write_urb->transfer_buffer,
1302 port->bulk_out_size);
1303
1304 if (count == 0)
1305 goto unlock;
1306
1307 tport->tp_write_urb_in_use = 1;
1308
1309 spin_unlock_irqrestore(&tport->tp_lock, flags);
1310
1311 usb_serial_debug_data(debug, &port->dev, __func__, count,
1312 port->write_urb->transfer_buffer);
1313
1314 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1315 usb_sndbulkpipe(port->serial->dev,
1316 port->bulk_out_endpointAddress),
1317 port->write_urb->transfer_buffer, count,
1318 ti_bulk_out_callback, tport);
1319
1320 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1321 if (result) {
1322 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1323 __func__, result);
1324 tport->tp_write_urb_in_use = 0;
1325 /* TODO: reschedule ti_send */
1326 } else {
1327 spin_lock_irqsave(&tport->tp_lock, flags);
1328 tport->tp_icount.tx += count;
1329 spin_unlock_irqrestore(&tport->tp_lock, flags);
1330 }
1331
1332 /* more room in the buffer for new writes, wakeup */
1333 if (tty)
1334 tty_wakeup(tty);
1335 tty_kref_put(tty);
1336 wake_up_interruptible(&tport->tp_write_wait);
1337 return;
1338 unlock:
1339 spin_unlock_irqrestore(&tport->tp_lock, flags);
1340 tty_kref_put(tty);
1341 return;
1342 }
1343
1344
1345 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1346 {
1347 unsigned long flags;
1348 int status;
1349
1350 status = ti_write_byte(tport->tp_tdev,
1351 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1352 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1353
1354 spin_lock_irqsave(&tport->tp_lock, flags);
1355 if (!status)
1356 tport->tp_shadow_mcr = mcr;
1357 spin_unlock_irqrestore(&tport->tp_lock, flags);
1358
1359 return status;
1360 }
1361
1362
1363 static int ti_get_lsr(struct ti_port *tport)
1364 {
1365 int size, status;
1366 struct ti_device *tdev = tport->tp_tdev;
1367 struct usb_serial_port *port = tport->tp_port;
1368 int port_number = port->number - port->serial->minor;
1369 struct ti_port_status *data;
1370
1371 dbg("%s - port %d", __func__, port->number);
1372
1373 size = sizeof(struct ti_port_status);
1374 data = kmalloc(size, GFP_KERNEL);
1375 if (!data) {
1376 dev_err(&port->dev, "%s - out of memory\n", __func__);
1377 return -ENOMEM;
1378 }
1379
1380 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1381 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1382 if (status) {
1383 dev_err(&port->dev,
1384 "%s - get port status command failed, %d\n",
1385 __func__, status);
1386 goto free_data;
1387 }
1388
1389 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1390
1391 tport->tp_lsr = data->bLSR;
1392
1393 free_data:
1394 kfree(data);
1395 return status;
1396 }
1397
1398
1399 static int ti_get_serial_info(struct ti_port *tport,
1400 struct serial_struct __user *ret_arg)
1401 {
1402 struct usb_serial_port *port = tport->tp_port;
1403 struct serial_struct ret_serial;
1404
1405 if (!ret_arg)
1406 return -EFAULT;
1407
1408 memset(&ret_serial, 0, sizeof(ret_serial));
1409
1410 ret_serial.type = PORT_16550A;
1411 ret_serial.line = port->serial->minor;
1412 ret_serial.port = port->number - port->serial->minor;
1413 ret_serial.flags = tport->tp_flags;
1414 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1415 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1416 ret_serial.closing_wait = tport->tp_closing_wait;
1417
1418 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1419 return -EFAULT;
1420
1421 return 0;
1422 }
1423
1424
1425 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1426 struct serial_struct __user *new_arg)
1427 {
1428 struct serial_struct new_serial;
1429
1430 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1431 return -EFAULT;
1432
1433 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1434 tport->tp_closing_wait = new_serial.closing_wait;
1435
1436 return 0;
1437 }
1438
1439
1440 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1441 {
1442 struct async_icount *icount;
1443 struct tty_struct *tty;
1444 unsigned long flags;
1445
1446 dbg("%s - msr 0x%02X", __func__, msr);
1447
1448 if (msr & TI_MSR_DELTA_MASK) {
1449 spin_lock_irqsave(&tport->tp_lock, flags);
1450 icount = &tport->tp_icount;
1451 if (msr & TI_MSR_DELTA_CTS)
1452 icount->cts++;
1453 if (msr & TI_MSR_DELTA_DSR)
1454 icount->dsr++;
1455 if (msr & TI_MSR_DELTA_CD)
1456 icount->dcd++;
1457 if (msr & TI_MSR_DELTA_RI)
1458 icount->rng++;
1459 wake_up_interruptible(&tport->tp_msr_wait);
1460 spin_unlock_irqrestore(&tport->tp_lock, flags);
1461 }
1462
1463 tport->tp_msr = msr & TI_MSR_MASK;
1464
1465 /* handle CTS flow control */
1466 tty = tty_port_tty_get(&tport->tp_port->port);
1467 if (tty && C_CRTSCTS(tty)) {
1468 if (msr & TI_MSR_CTS) {
1469 tty->hw_stopped = 0;
1470 tty_wakeup(tty);
1471 } else {
1472 tty->hw_stopped = 1;
1473 }
1474 }
1475 tty_kref_put(tty);
1476 }
1477
1478
1479 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1480 {
1481 struct ti_device *tdev = tport->tp_tdev;
1482 struct usb_serial_port *port = tport->tp_port;
1483 wait_queue_t wait;
1484
1485 dbg("%s - port %d", __func__, port->number);
1486
1487 spin_lock_irq(&tport->tp_lock);
1488
1489 /* wait for data to drain from the buffer */
1490 tdev->td_urb_error = 0;
1491 init_waitqueue_entry(&wait, current);
1492 add_wait_queue(&tport->tp_write_wait, &wait);
1493 for (;;) {
1494 set_current_state(TASK_INTERRUPTIBLE);
1495 if (kfifo_len(&tport->write_fifo) == 0
1496 || timeout == 0 || signal_pending(current)
1497 || tdev->td_urb_error
1498 || port->serial->disconnected) /* disconnect */
1499 break;
1500 spin_unlock_irq(&tport->tp_lock);
1501 timeout = schedule_timeout(timeout);
1502 spin_lock_irq(&tport->tp_lock);
1503 }
1504 set_current_state(TASK_RUNNING);
1505 remove_wait_queue(&tport->tp_write_wait, &wait);
1506
1507 /* flush any remaining data in the buffer */
1508 if (flush)
1509 kfifo_reset_out(&tport->write_fifo);
1510
1511 spin_unlock_irq(&tport->tp_lock);
1512
1513 mutex_lock(&port->serial->disc_mutex);
1514 /* wait for data to drain from the device */
1515 /* wait for empty tx register, plus 20 ms */
1516 timeout += jiffies;
1517 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1518 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1519 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1520 && !port->serial->disconnected) {
1521 if (ti_get_lsr(tport))
1522 break;
1523 mutex_unlock(&port->serial->disc_mutex);
1524 msleep_interruptible(20);
1525 mutex_lock(&port->serial->disc_mutex);
1526 }
1527 mutex_unlock(&port->serial->disc_mutex);
1528 }
1529
1530
1531 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1532 {
1533 unsigned long flags;
1534
1535 spin_lock_irqsave(&tport->tp_lock, flags);
1536
1537 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1538 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1539
1540 spin_unlock_irqrestore(&tport->tp_lock, flags);
1541 }
1542
1543
1544 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1545 {
1546 struct urb *urb;
1547 int status = 0;
1548 unsigned long flags;
1549
1550 spin_lock_irqsave(&tport->tp_lock, flags);
1551
1552 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1553 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1554 urb = tport->tp_port->read_urb;
1555 spin_unlock_irqrestore(&tport->tp_lock, flags);
1556 urb->complete = ti_bulk_in_callback;
1557 urb->context = tport;
1558 urb->dev = tport->tp_port->serial->dev;
1559 status = usb_submit_urb(urb, GFP_KERNEL);
1560 } else {
1561 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1562 spin_unlock_irqrestore(&tport->tp_lock, flags);
1563 }
1564
1565 return status;
1566 }
1567
1568
1569 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1570 __u16 moduleid, __u16 value, __u8 *data, int size)
1571 {
1572 int status;
1573
1574 status = usb_control_msg(tdev->td_serial->dev,
1575 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1576 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1577 value, moduleid, data, size, 1000);
1578
1579 if (status == size)
1580 status = 0;
1581
1582 if (status > 0)
1583 status = -ECOMM;
1584
1585 return status;
1586 }
1587
1588
1589 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1590 __u16 moduleid, __u16 value, __u8 *data, int size)
1591 {
1592 int status;
1593
1594 status = usb_control_msg(tdev->td_serial->dev,
1595 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1596 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1597 value, moduleid, data, size, 1000);
1598
1599 if (status == size)
1600 status = 0;
1601
1602 if (status > 0)
1603 status = -ECOMM;
1604
1605 return status;
1606 }
1607
1608
1609 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1610 __u8 mask, __u8 byte)
1611 {
1612 int status;
1613 unsigned int size;
1614 struct ti_write_data_bytes *data;
1615 struct device *dev = &tdev->td_serial->dev->dev;
1616
1617 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1618 __func__, addr, mask, byte);
1619
1620 size = sizeof(struct ti_write_data_bytes) + 2;
1621 data = kmalloc(size, GFP_KERNEL);
1622 if (!data) {
1623 dev_err(dev, "%s - out of memory\n", __func__);
1624 return -ENOMEM;
1625 }
1626
1627 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1628 data->bDataType = TI_RW_DATA_BYTE;
1629 data->bDataCounter = 1;
1630 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1631 data->wBaseAddrLo = cpu_to_be16(addr);
1632 data->bData[0] = mask;
1633 data->bData[1] = byte;
1634
1635 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1636 (__u8 *)data, size);
1637
1638 if (status < 0)
1639 dev_err(dev, "%s - failed, %d\n", __func__, status);
1640
1641 kfree(data);
1642
1643 return status;
1644 }
1645
1646 static int ti_do_download(struct usb_device *dev, int pipe,
1647 u8 *buffer, int size)
1648 {
1649 int pos;
1650 u8 cs = 0;
1651 int done;
1652 struct ti_firmware_header *header;
1653 int status = 0;
1654 int len;
1655
1656 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1657 cs = (__u8)(cs + buffer[pos]);
1658
1659 header = (struct ti_firmware_header *)buffer;
1660 header->wLength = cpu_to_le16((__u16)(size
1661 - sizeof(struct ti_firmware_header)));
1662 header->bCheckSum = cs;
1663
1664 dbg("%s - downloading firmware", __func__);
1665 for (pos = 0; pos < size; pos += done) {
1666 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1667 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1668 &done, 1000);
1669 if (status)
1670 break;
1671 }
1672 return status;
1673 }
1674
1675 static int ti_download_firmware(struct ti_device *tdev)
1676 {
1677 int status;
1678 int buffer_size;
1679 __u8 *buffer;
1680 struct usb_device *dev = tdev->td_serial->dev;
1681 unsigned int pipe = usb_sndbulkpipe(dev,
1682 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1683 const struct firmware *fw_p;
1684 char buf[32];
1685
1686 dbg("%s\n", __func__);
1687 /* try ID specific firmware first, then try generic firmware */
1688 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1689 dev->descriptor.idProduct);
1690 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1691 buf[0] = '\0';
1692 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1693 switch (dev->descriptor.idProduct) {
1694 case MTS_CDMA_PRODUCT_ID:
1695 strcpy(buf, "mts_cdma.fw");
1696 break;
1697 case MTS_GSM_PRODUCT_ID:
1698 strcpy(buf, "mts_gsm.fw");
1699 break;
1700 case MTS_EDGE_PRODUCT_ID:
1701 strcpy(buf, "mts_edge.fw");
1702 break;
1703 case MTS_MT9234MU_PRODUCT_ID:
1704 strcpy(buf, "mts_mt9234mu.fw");
1705 break;
1706 case MTS_MT9234ZBA_PRODUCT_ID:
1707 strcpy(buf, "mts_mt9234zba.fw");
1708 break;
1709 case MTS_MT9234ZBAOLD_PRODUCT_ID:
1710 strcpy(buf, "mts_mt9234zba.fw");
1711 break; }
1712 }
1713 if (buf[0] == '\0') {
1714 if (tdev->td_is_3410)
1715 strcpy(buf, "ti_3410.fw");
1716 else
1717 strcpy(buf, "ti_5052.fw");
1718 }
1719 status = request_firmware(&fw_p, buf, &dev->dev);
1720 }
1721 if (status) {
1722 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1723 return -ENOENT;
1724 }
1725 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1726 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1727 return -ENOENT;
1728 }
1729
1730 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1731 buffer = kmalloc(buffer_size, GFP_KERNEL);
1732 if (buffer) {
1733 memcpy(buffer, fw_p->data, fw_p->size);
1734 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1735 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1736 kfree(buffer);
1737 } else {
1738 dbg("%s ENOMEM\n", __func__);
1739 status = -ENOMEM;
1740 }
1741 release_firmware(fw_p);
1742 if (status) {
1743 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1744 __func__, status);
1745 return status;
1746 }
1747
1748 dbg("%s - download successful", __func__);
1749
1750 return 0;
1751 }
Linux 2.6 libata-dev (mirror)