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Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev
[linux/fpc-iii.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob3bc609fe2242a574643fe84353cf9de665fc25e3
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/circ_buf.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 "v0.9"
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 circ_buf *tp_write_buf;
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 struct file *file);
103 static void ti_close(struct usb_serial_port *port);
104 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
105 const unsigned char *data, int count);
106 static int ti_write_room(struct tty_struct *tty);
107 static int ti_chars_in_buffer(struct tty_struct *tty);
108 static void ti_throttle(struct tty_struct *tty);
109 static void ti_unthrottle(struct tty_struct *tty);
110 static int ti_ioctl(struct tty_struct *tty, struct file *file,
111 unsigned int cmd, unsigned long arg);
112 static void ti_set_termios(struct tty_struct *tty,
113 struct usb_serial_port *port, struct ktermios *old_termios);
114 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
115 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
116 unsigned int set, unsigned int clear);
117 static void ti_break(struct tty_struct *tty, int break_state);
118 static void ti_interrupt_callback(struct urb *urb);
119 static void ti_bulk_in_callback(struct urb *urb);
120 static void ti_bulk_out_callback(struct urb *urb);
121
122 static void ti_recv(struct device *dev, struct tty_struct *tty,
123 unsigned char *data, int length);
124 static void ti_send(struct ti_port *tport);
125 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
126 static int ti_get_lsr(struct ti_port *tport);
127 static int ti_get_serial_info(struct ti_port *tport,
128 struct serial_struct __user *ret_arg);
129 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
130 struct serial_struct __user *new_arg);
131 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
132
133 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
134
135 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
136 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
137
138 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
139 __u16 moduleid, __u16 value, __u8 *data, int size);
140 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
141 __u16 moduleid, __u16 value, __u8 *data, int size);
142
143 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
144 __u8 mask, __u8 byte);
145
146 static int ti_download_firmware(struct ti_device *tdev);
147
148 /* circular buffer */
149 static struct circ_buf *ti_buf_alloc(void);
150 static void ti_buf_free(struct circ_buf *cb);
151 static void ti_buf_clear(struct circ_buf *cb);
152 static int ti_buf_data_avail(struct circ_buf *cb);
153 static int ti_buf_space_avail(struct circ_buf *cb);
154 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
155 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
156
157
158 /* Data */
159
160 /* module parameters */
161 static int debug;
162 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
163 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
164 static unsigned int vendor_3410_count;
165 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
166 static unsigned int product_3410_count;
167 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
168 static unsigned int vendor_5052_count;
169 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
170 static unsigned int product_5052_count;
171
172 /* supported devices */
173 /* the array dimension is the number of default entries plus */
174 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
175 /* null entry */
176 static struct usb_device_id ti_id_table_3410[10+TI_EXTRA_VID_PID_COUNT+1] = {
177 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
178 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
179 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
180 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
181 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
182 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
183 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
184 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
185 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
186 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
187 };
188
189 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
190 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
191 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
192 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
193 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
194 };
195
196 static struct usb_device_id ti_id_table_combined[14+2*TI_EXTRA_VID_PID_COUNT+1] = {
197 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
198 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
199 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
200 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
202 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
203 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
204 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
205 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
206 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
207 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
208 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
209 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
210 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
211 { }
212 };
213
214 static struct usb_driver ti_usb_driver = {
215 .name = "ti_usb_3410_5052",
216 .probe = usb_serial_probe,
217 .disconnect = usb_serial_disconnect,
218 .id_table = ti_id_table_combined,
219 .no_dynamic_id = 1,
220 };
221
222 static struct usb_serial_driver ti_1port_device = {
223 .driver = {
224 .owner = THIS_MODULE,
225 .name = "ti_usb_3410_5052_1",
226 },
227 .description = "TI USB 3410 1 port adapter",
228 .usb_driver = &ti_usb_driver,
229 .id_table = ti_id_table_3410,
230 .num_ports = 1,
231 .attach = ti_startup,
232 .release = ti_release,
233 .open = ti_open,
234 .close = ti_close,
235 .write = ti_write,
236 .write_room = ti_write_room,
237 .chars_in_buffer = ti_chars_in_buffer,
238 .throttle = ti_throttle,
239 .unthrottle = ti_unthrottle,
240 .ioctl = ti_ioctl,
241 .set_termios = ti_set_termios,
242 .tiocmget = ti_tiocmget,
243 .tiocmset = ti_tiocmset,
244 .break_ctl = ti_break,
245 .read_int_callback = ti_interrupt_callback,
246 .read_bulk_callback = ti_bulk_in_callback,
247 .write_bulk_callback = ti_bulk_out_callback,
248 };
249
250 static struct usb_serial_driver ti_2port_device = {
251 .driver = {
252 .owner = THIS_MODULE,
253 .name = "ti_usb_3410_5052_2",
254 },
255 .description = "TI USB 5052 2 port adapter",
256 .usb_driver = &ti_usb_driver,
257 .id_table = ti_id_table_5052,
258 .num_ports = 2,
259 .attach = ti_startup,
260 .release = ti_release,
261 .open = ti_open,
262 .close = ti_close,
263 .write = ti_write,
264 .write_room = ti_write_room,
265 .chars_in_buffer = ti_chars_in_buffer,
266 .throttle = ti_throttle,
267 .unthrottle = ti_unthrottle,
268 .ioctl = ti_ioctl,
269 .set_termios = ti_set_termios,
270 .tiocmget = ti_tiocmget,
271 .tiocmset = ti_tiocmset,
272 .break_ctl = ti_break,
273 .read_int_callback = ti_interrupt_callback,
274 .read_bulk_callback = ti_bulk_in_callback,
275 .write_bulk_callback = ti_bulk_out_callback,
276 };
277
278
279 /* Module */
280
281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
283 MODULE_VERSION(TI_DRIVER_VERSION);
284 MODULE_LICENSE("GPL");
285
286 MODULE_FIRMWARE("ti_3410.fw");
287 MODULE_FIRMWARE("ti_5052.fw");
288 MODULE_FIRMWARE("mts_cdma.fw");
289 MODULE_FIRMWARE("mts_gsm.fw");
290 MODULE_FIRMWARE("mts_edge.fw");
291
292 module_param(debug, bool, S_IRUGO | S_IWUSR);
293 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
294
295 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
296 MODULE_PARM_DESC(closing_wait,
297 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
298
299 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
300 MODULE_PARM_DESC(vendor_3410,
301 "Vendor ids for 3410 based devices, 1-5 short integers");
302 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
303 MODULE_PARM_DESC(product_3410,
304 "Product ids for 3410 based devices, 1-5 short integers");
305 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
306 MODULE_PARM_DESC(vendor_5052,
307 "Vendor ids for 5052 based devices, 1-5 short integers");
308 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
309 MODULE_PARM_DESC(product_5052,
310 "Product ids for 5052 based devices, 1-5 short integers");
311
312 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
313
314
315 /* Functions */
316
317 static int __init ti_init(void)
318 {
319 int i, j, c;
320 int ret;
321
322 /* insert extra vendor and product ids */
323 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
324 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
325 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
326 ti_id_table_3410[j].idVendor = vendor_3410[i];
327 ti_id_table_3410[j].idProduct = product_3410[i];
328 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
329 ti_id_table_combined[c].idVendor = vendor_3410[i];
330 ti_id_table_combined[c].idProduct = product_3410[i];
331 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
332 }
333 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
334 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
335 ti_id_table_5052[j].idVendor = vendor_5052[i];
336 ti_id_table_5052[j].idProduct = product_5052[i];
337 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
338 ti_id_table_combined[c].idVendor = vendor_5052[i];
339 ti_id_table_combined[c].idProduct = product_5052[i];
340 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
341 }
342
343 ret = usb_serial_register(&ti_1port_device);
344 if (ret)
345 goto failed_1port;
346 ret = usb_serial_register(&ti_2port_device);
347 if (ret)
348 goto failed_2port;
349
350 ret = usb_register(&ti_usb_driver);
351 if (ret)
352 goto failed_usb;
353
354 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
355 TI_DRIVER_DESC "\n");
356
357 return 0;
358
359 failed_usb:
360 usb_serial_deregister(&ti_2port_device);
361 failed_2port:
362 usb_serial_deregister(&ti_1port_device);
363 failed_1port:
364 return ret;
365 }
366
367
368 static void __exit ti_exit(void)
369 {
370 usb_serial_deregister(&ti_1port_device);
371 usb_serial_deregister(&ti_2port_device);
372 usb_deregister(&ti_usb_driver);
373 }
374
375
376 module_init(ti_init);
377 module_exit(ti_exit);
378
379
380 static int ti_startup(struct usb_serial *serial)
381 {
382 struct ti_device *tdev;
383 struct ti_port *tport;
384 struct usb_device *dev = serial->dev;
385 int status;
386 int i;
387
388
389 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
390 __func__, le16_to_cpu(dev->descriptor.idProduct),
391 dev->descriptor.bNumConfigurations,
392 dev->actconfig->desc.bConfigurationValue);
393
394 /* create device structure */
395 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
396 if (tdev == NULL) {
397 dev_err(&dev->dev, "%s - out of memory\n", __func__);
398 return -ENOMEM;
399 }
400 mutex_init(&tdev->td_open_close_lock);
401 tdev->td_serial = serial;
402 usb_set_serial_data(serial, tdev);
403
404 /* determine device type */
405 if (usb_match_id(serial->interface, ti_id_table_3410))
406 tdev->td_is_3410 = 1;
407 dbg("%s - device type is %s", __func__,
408 tdev->td_is_3410 ? "3410" : "5052");
409
410 /* if we have only 1 configuration, download firmware */
411 if (dev->descriptor.bNumConfigurations == 1) {
412 if ((status = ti_download_firmware(tdev)) != 0)
413 goto free_tdev;
414
415 /* 3410 must be reset, 5052 resets itself */
416 if (tdev->td_is_3410) {
417 msleep_interruptible(100);
418 usb_reset_device(dev);
419 }
420
421 status = -ENODEV;
422 goto free_tdev;
423 }
424
425 /* the second configuration must be set */
426 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
427 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
428 status = status ? status : -ENODEV;
429 goto free_tdev;
430 }
431
432 /* set up port structures */
433 for (i = 0; i < serial->num_ports; ++i) {
434 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
435 if (tport == NULL) {
436 dev_err(&dev->dev, "%s - out of memory\n", __func__);
437 status = -ENOMEM;
438 goto free_tports;
439 }
440 spin_lock_init(&tport->tp_lock);
441 tport->tp_uart_base_addr = (i == 0 ?
442 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
443 tport->tp_closing_wait = closing_wait;
444 init_waitqueue_head(&tport->tp_msr_wait);
445 init_waitqueue_head(&tport->tp_write_wait);
446 tport->tp_write_buf = ti_buf_alloc();
447 if (tport->tp_write_buf == NULL) {
448 dev_err(&dev->dev, "%s - out of memory\n", __func__);
449 kfree(tport);
450 status = -ENOMEM;
451 goto free_tports;
452 }
453 tport->tp_port = serial->port[i];
454 tport->tp_tdev = tdev;
455 usb_set_serial_port_data(serial->port[i], tport);
456 tport->tp_uart_mode = 0; /* default is RS232 */
457 }
458
459 return 0;
460
461 free_tports:
462 for (--i; i >= 0; --i) {
463 tport = usb_get_serial_port_data(serial->port[i]);
464 ti_buf_free(tport->tp_write_buf);
465 kfree(tport);
466 usb_set_serial_port_data(serial->port[i], NULL);
467 }
468 free_tdev:
469 kfree(tdev);
470 usb_set_serial_data(serial, NULL);
471 return status;
472 }
473
474
475 static void ti_release(struct usb_serial *serial)
476 {
477 int i;
478 struct ti_device *tdev = usb_get_serial_data(serial);
479 struct ti_port *tport;
480
481 dbg("%s", __func__);
482
483 for (i = 0; i < serial->num_ports; ++i) {
484 tport = usb_get_serial_port_data(serial->port[i]);
485 if (tport) {
486 ti_buf_free(tport->tp_write_buf);
487 kfree(tport);
488 }
489 }
490
491 kfree(tdev);
492 }
493
494
495 static int ti_open(struct tty_struct *tty,
496 struct usb_serial_port *port, struct file *file)
497 {
498 struct ti_port *tport = usb_get_serial_port_data(port);
499 struct ti_device *tdev;
500 struct usb_device *dev;
501 struct urb *urb;
502 int port_number;
503 int status;
504 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
505 TI_PIPE_TIMEOUT_ENABLE |
506 (TI_TRANSFER_TIMEOUT << 2));
507
508 dbg("%s - port %d", __func__, port->number);
509
510 if (tport == NULL)
511 return -ENODEV;
512
513 dev = port->serial->dev;
514 tdev = tport->tp_tdev;
515
516 /* only one open on any port on a device at a time */
517 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
518 return -ERESTARTSYS;
519
520 port_number = port->number - port->serial->minor;
521
522 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
523
524 tport->tp_msr = 0;
525 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
526
527 /* start interrupt urb the first time a port is opened on this device */
528 if (tdev->td_open_port_count == 0) {
529 dbg("%s - start interrupt in urb", __func__);
530 urb = tdev->td_serial->port[0]->interrupt_in_urb;
531 if (!urb) {
532 dev_err(&port->dev, "%s - no interrupt urb\n",
533 __func__);
534 status = -EINVAL;
535 goto release_lock;
536 }
537 urb->complete = ti_interrupt_callback;
538 urb->context = tdev;
539 urb->dev = dev;
540 status = usb_submit_urb(urb, GFP_KERNEL);
541 if (status) {
542 dev_err(&port->dev,
543 "%s - submit interrupt urb failed, %d\n",
544 __func__, status);
545 goto release_lock;
546 }
547 }
548
549 if (tty)
550 ti_set_termios(tty, port, tty->termios);
551
552 dbg("%s - sending TI_OPEN_PORT", __func__);
553 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
554 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
555 if (status) {
556 dev_err(&port->dev, "%s - cannot send open command, %d\n",
557 __func__, status);
558 goto unlink_int_urb;
559 }
560
561 dbg("%s - sending TI_START_PORT", __func__);
562 status = ti_command_out_sync(tdev, TI_START_PORT,
563 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
564 if (status) {
565 dev_err(&port->dev, "%s - cannot send start command, %d\n",
566 __func__, status);
567 goto unlink_int_urb;
568 }
569
570 dbg("%s - sending TI_PURGE_PORT", __func__);
571 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
572 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
573 if (status) {
574 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
575 __func__, status);
576 goto unlink_int_urb;
577 }
578 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
579 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
580 if (status) {
581 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
582 __func__, status);
583 goto unlink_int_urb;
584 }
585
586 /* reset the data toggle on the bulk endpoints to work around bug in
587 * host controllers where things get out of sync some times */
588 usb_clear_halt(dev, port->write_urb->pipe);
589 usb_clear_halt(dev, port->read_urb->pipe);
590
591 if (tty)
592 ti_set_termios(tty, port, tty->termios);
593
594 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
595 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
596 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
597 if (status) {
598 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
599 __func__, status);
600 goto unlink_int_urb;
601 }
602
603 dbg("%s - sending TI_START_PORT (2)", __func__);
604 status = ti_command_out_sync(tdev, TI_START_PORT,
605 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
606 if (status) {
607 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
608 __func__, status);
609 goto unlink_int_urb;
610 }
611
612 /* start read urb */
613 dbg("%s - start read urb", __func__);
614 urb = port->read_urb;
615 if (!urb) {
616 dev_err(&port->dev, "%s - no read urb\n", __func__);
617 status = -EINVAL;
618 goto unlink_int_urb;
619 }
620 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
621 urb->complete = ti_bulk_in_callback;
622 urb->context = tport;
623 urb->dev = dev;
624 status = usb_submit_urb(urb, GFP_KERNEL);
625 if (status) {
626 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
627 __func__, status);
628 goto unlink_int_urb;
629 }
630
631 tport->tp_is_open = 1;
632 ++tdev->td_open_port_count;
633
634 goto release_lock;
635
636 unlink_int_urb:
637 if (tdev->td_open_port_count == 0)
638 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
639 release_lock:
640 mutex_unlock(&tdev->td_open_close_lock);
641 dbg("%s - exit %d", __func__, status);
642 return status;
643 }
644
645
646 static void ti_close(struct usb_serial_port *port)
647 {
648 struct ti_device *tdev;
649 struct ti_port *tport;
650 int port_number;
651 int status;
652 int do_unlock;
653
654 dbg("%s - port %d", __func__, port->number);
655
656 tdev = usb_get_serial_data(port->serial);
657 tport = usb_get_serial_port_data(port);
658 if (tdev == NULL || tport == NULL)
659 return;
660
661 tport->tp_is_open = 0;
662
663 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
664
665 usb_kill_urb(port->read_urb);
666 usb_kill_urb(port->write_urb);
667 tport->tp_write_urb_in_use = 0;
668
669 port_number = port->number - port->serial->minor;
670
671 dbg("%s - sending TI_CLOSE_PORT", __func__);
672 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
673 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
674 if (status)
675 dev_err(&port->dev,
676 "%s - cannot send close port command, %d\n"
677 , __func__, status);
678
679 /* if mutex_lock is interrupted, continue anyway */
680 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
681 --tport->tp_tdev->td_open_port_count;
682 if (tport->tp_tdev->td_open_port_count <= 0) {
683 /* last port is closed, shut down interrupt urb */
684 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
685 tport->tp_tdev->td_open_port_count = 0;
686 }
687 if (do_unlock)
688 mutex_unlock(&tdev->td_open_close_lock);
689
690 dbg("%s - exit", __func__);
691 }
692
693
694 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
695 const unsigned char *data, int count)
696 {
697 struct ti_port *tport = usb_get_serial_port_data(port);
698 unsigned long flags;
699
700 dbg("%s - port %d", __func__, port->number);
701
702 if (count == 0) {
703 dbg("%s - write request of 0 bytes", __func__);
704 return 0;
705 }
706
707 if (tport == NULL || !tport->tp_is_open)
708 return -ENODEV;
709
710 spin_lock_irqsave(&tport->tp_lock, flags);
711 count = ti_buf_put(tport->tp_write_buf, data, count);
712 spin_unlock_irqrestore(&tport->tp_lock, flags);
713
714 ti_send(tport);
715
716 return count;
717 }
718
719
720 static int ti_write_room(struct tty_struct *tty)
721 {
722 struct usb_serial_port *port = tty->driver_data;
723 struct ti_port *tport = usb_get_serial_port_data(port);
724 int room = 0;
725 unsigned long flags;
726
727 dbg("%s - port %d", __func__, port->number);
728
729 if (tport == NULL)
730 return 0;
731
732 spin_lock_irqsave(&tport->tp_lock, flags);
733 room = ti_buf_space_avail(tport->tp_write_buf);
734 spin_unlock_irqrestore(&tport->tp_lock, flags);
735
736 dbg("%s - returns %d", __func__, room);
737 return room;
738 }
739
740
741 static int ti_chars_in_buffer(struct tty_struct *tty)
742 {
743 struct usb_serial_port *port = tty->driver_data;
744 struct ti_port *tport = usb_get_serial_port_data(port);
745 int chars = 0;
746 unsigned long flags;
747
748 dbg("%s - port %d", __func__, port->number);
749
750 if (tport == NULL)
751 return 0;
752
753 spin_lock_irqsave(&tport->tp_lock, flags);
754 chars = ti_buf_data_avail(tport->tp_write_buf);
755 spin_unlock_irqrestore(&tport->tp_lock, flags);
756
757 dbg("%s - returns %d", __func__, chars);
758 return chars;
759 }
760
761
762 static void ti_throttle(struct tty_struct *tty)
763 {
764 struct usb_serial_port *port = tty->driver_data;
765 struct ti_port *tport = usb_get_serial_port_data(port);
766
767 dbg("%s - port %d", __func__, port->number);
768
769 if (tport == NULL)
770 return;
771
772 if (I_IXOFF(tty) || C_CRTSCTS(tty))
773 ti_stop_read(tport, tty);
774
775 }
776
777
778 static void ti_unthrottle(struct tty_struct *tty)
779 {
780 struct usb_serial_port *port = tty->driver_data;
781 struct ti_port *tport = usb_get_serial_port_data(port);
782 int status;
783
784 dbg("%s - port %d", __func__, port->number);
785
786 if (tport == NULL)
787 return;
788
789 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
790 status = ti_restart_read(tport, tty);
791 if (status)
792 dev_err(&port->dev, "%s - cannot restart read, %d\n",
793 __func__, status);
794 }
795 }
796
797
798 static int ti_ioctl(struct tty_struct *tty, struct file *file,
799 unsigned int cmd, unsigned long arg)
800 {
801 struct usb_serial_port *port = tty->driver_data;
802 struct ti_port *tport = usb_get_serial_port_data(port);
803 struct async_icount cnow;
804 struct async_icount cprev;
805
806 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
807
808 if (tport == NULL)
809 return -ENODEV;
810
811 switch (cmd) {
812 case TIOCGSERIAL:
813 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
814 return ti_get_serial_info(tport,
815 (struct serial_struct __user *)arg);
816 case TIOCSSERIAL:
817 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
818 return ti_set_serial_info(tty, tport,
819 (struct serial_struct __user *)arg);
820 case TIOCMIWAIT:
821 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
822 cprev = tport->tp_icount;
823 while (1) {
824 interruptible_sleep_on(&tport->tp_msr_wait);
825 if (signal_pending(current))
826 return -ERESTARTSYS;
827 cnow = tport->tp_icount;
828 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
829 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
830 return -EIO; /* no change => error */
831 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
832 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
833 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
834 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
835 return 0;
836 cprev = cnow;
837 }
838 break;
839 case TIOCGICOUNT:
840 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
841 __func__, port->number,
842 tport->tp_icount.rx, tport->tp_icount.tx);
843 if (copy_to_user((void __user *)arg, &tport->tp_icount,
844 sizeof(tport->tp_icount)))
845 return -EFAULT;
846 return 0;
847 }
848 return -ENOIOCTLCMD;
849 }
850
851
852 static void ti_set_termios(struct tty_struct *tty,
853 struct usb_serial_port *port, struct ktermios *old_termios)
854 {
855 struct ti_port *tport = usb_get_serial_port_data(port);
856 struct ti_uart_config *config;
857 tcflag_t cflag, iflag;
858 int baud;
859 int status;
860 int port_number = port->number - port->serial->minor;
861 unsigned int mcr;
862
863 dbg("%s - port %d", __func__, port->number);
864
865 cflag = tty->termios->c_cflag;
866 iflag = tty->termios->c_iflag;
867
868 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
869 dbg("%s - old clfag %08x, old iflag %08x", __func__,
870 old_termios->c_cflag, old_termios->c_iflag);
871
872 if (tport == NULL)
873 return;
874
875 config = kmalloc(sizeof(*config), GFP_KERNEL);
876 if (!config) {
877 dev_err(&port->dev, "%s - out of memory\n", __func__);
878 return;
879 }
880
881 config->wFlags = 0;
882
883 /* these flags must be set */
884 config->wFlags |= TI_UART_ENABLE_MS_INTS;
885 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
886 config->bUartMode = (__u8)(tport->tp_uart_mode);
887
888 switch (cflag & CSIZE) {
889 case CS5:
890 config->bDataBits = TI_UART_5_DATA_BITS;
891 break;
892 case CS6:
893 config->bDataBits = TI_UART_6_DATA_BITS;
894 break;
895 case CS7:
896 config->bDataBits = TI_UART_7_DATA_BITS;
897 break;
898 default:
899 case CS8:
900 config->bDataBits = TI_UART_8_DATA_BITS;
901 break;
902 }
903
904 /* CMSPAR isn't supported by this driver */
905 tty->termios->c_cflag &= ~CMSPAR;
906
907 if (cflag & PARENB) {
908 if (cflag & PARODD) {
909 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
910 config->bParity = TI_UART_ODD_PARITY;
911 } else {
912 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
913 config->bParity = TI_UART_EVEN_PARITY;
914 }
915 } else {
916 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
917 config->bParity = TI_UART_NO_PARITY;
918 }
919
920 if (cflag & CSTOPB)
921 config->bStopBits = TI_UART_2_STOP_BITS;
922 else
923 config->bStopBits = TI_UART_1_STOP_BITS;
924
925 if (cflag & CRTSCTS) {
926 /* RTS flow control must be off to drop RTS for baud rate B0 */
927 if ((cflag & CBAUD) != B0)
928 config->wFlags |= TI_UART_ENABLE_RTS_IN;
929 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
930 } else {
931 tty->hw_stopped = 0;
932 ti_restart_read(tport, tty);
933 }
934
935 if (I_IXOFF(tty) || I_IXON(tty)) {
936 config->cXon = START_CHAR(tty);
937 config->cXoff = STOP_CHAR(tty);
938
939 if (I_IXOFF(tty))
940 config->wFlags |= TI_UART_ENABLE_X_IN;
941 else
942 ti_restart_read(tport, tty);
943
944 if (I_IXON(tty))
945 config->wFlags |= TI_UART_ENABLE_X_OUT;
946 }
947
948 baud = tty_get_baud_rate(tty);
949 if (!baud)
950 baud = 9600;
951 if (tport->tp_tdev->td_is_3410)
952 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
953 else
954 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
955
956 /* FIXME: Should calculate resulting baud here and report it back */
957 if ((cflag & CBAUD) != B0)
958 tty_encode_baud_rate(tty, baud, baud);
959
960 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
961 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
962
963 cpu_to_be16s(&config->wBaudRate);
964 cpu_to_be16s(&config->wFlags);
965
966 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
967 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
968 sizeof(*config));
969 if (status)
970 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
971 __func__, port_number, status);
972
973 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
974 mcr = tport->tp_shadow_mcr;
975 /* if baud rate is B0, clear RTS and DTR */
976 if ((cflag & CBAUD) == B0)
977 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
978 status = ti_set_mcr(tport, mcr);
979 if (status)
980 dev_err(&port->dev,
981 "%s - cannot set modem control on port %d, %d\n",
982 __func__, port_number, status);
983
984 kfree(config);
985 }
986
987
988 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
989 {
990 struct usb_serial_port *port = tty->driver_data;
991 struct ti_port *tport = usb_get_serial_port_data(port);
992 unsigned int result;
993 unsigned int msr;
994 unsigned int mcr;
995 unsigned long flags;
996
997 dbg("%s - port %d", __func__, port->number);
998
999 if (tport == NULL)
1000 return -ENODEV;
1001
1002 spin_lock_irqsave(&tport->tp_lock, flags);
1003 msr = tport->tp_msr;
1004 mcr = tport->tp_shadow_mcr;
1005 spin_unlock_irqrestore(&tport->tp_lock, flags);
1006
1007 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1008 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1009 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1010 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1011 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1012 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1013 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1014
1015 dbg("%s - 0x%04X", __func__, result);
1016
1017 return result;
1018 }
1019
1020
1021 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1022 unsigned int set, unsigned int clear)
1023 {
1024 struct usb_serial_port *port = tty->driver_data;
1025 struct ti_port *tport = usb_get_serial_port_data(port);
1026 unsigned int mcr;
1027 unsigned long flags;
1028
1029 dbg("%s - port %d", __func__, port->number);
1030
1031 if (tport == NULL)
1032 return -ENODEV;
1033
1034 spin_lock_irqsave(&tport->tp_lock, flags);
1035 mcr = tport->tp_shadow_mcr;
1036
1037 if (set & TIOCM_RTS)
1038 mcr |= TI_MCR_RTS;
1039 if (set & TIOCM_DTR)
1040 mcr |= TI_MCR_DTR;
1041 if (set & TIOCM_LOOP)
1042 mcr |= TI_MCR_LOOP;
1043
1044 if (clear & TIOCM_RTS)
1045 mcr &= ~TI_MCR_RTS;
1046 if (clear & TIOCM_DTR)
1047 mcr &= ~TI_MCR_DTR;
1048 if (clear & TIOCM_LOOP)
1049 mcr &= ~TI_MCR_LOOP;
1050 spin_unlock_irqrestore(&tport->tp_lock, flags);
1051
1052 return ti_set_mcr(tport, mcr);
1053 }
1054
1055
1056 static void ti_break(struct tty_struct *tty, int break_state)
1057 {
1058 struct usb_serial_port *port = tty->driver_data;
1059 struct ti_port *tport = usb_get_serial_port_data(port);
1060 int status;
1061
1062 dbg("%s - state = %d", __func__, break_state);
1063
1064 if (tport == NULL)
1065 return;
1066
1067 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1068
1069 status = ti_write_byte(tport->tp_tdev,
1070 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1071 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1072
1073 if (status)
1074 dbg("%s - error setting break, %d", __func__, status);
1075 }
1076
1077
1078 static void ti_interrupt_callback(struct urb *urb)
1079 {
1080 struct ti_device *tdev = urb->context;
1081 struct usb_serial_port *port;
1082 struct usb_serial *serial = tdev->td_serial;
1083 struct ti_port *tport;
1084 struct device *dev = &urb->dev->dev;
1085 unsigned char *data = urb->transfer_buffer;
1086 int length = urb->actual_length;
1087 int port_number;
1088 int function;
1089 int status = urb->status;
1090 int retval;
1091 __u8 msr;
1092
1093 dbg("%s", __func__);
1094
1095 switch (status) {
1096 case 0:
1097 break;
1098 case -ECONNRESET:
1099 case -ENOENT:
1100 case -ESHUTDOWN:
1101 dbg("%s - urb shutting down, %d", __func__, status);
1102 tdev->td_urb_error = 1;
1103 return;
1104 default:
1105 dev_err(dev, "%s - nonzero urb status, %d\n",
1106 __func__, status);
1107 tdev->td_urb_error = 1;
1108 goto exit;
1109 }
1110
1111 if (length != 2) {
1112 dbg("%s - bad packet size, %d", __func__, length);
1113 goto exit;
1114 }
1115
1116 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1117 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1118 goto exit;
1119 }
1120
1121 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1122 function = TI_GET_FUNC_FROM_CODE(data[0]);
1123
1124 dbg("%s - port_number %d, function %d, data 0x%02X",
1125 __func__, port_number, function, data[1]);
1126
1127 if (port_number >= serial->num_ports) {
1128 dev_err(dev, "%s - bad port number, %d\n",
1129 __func__, port_number);
1130 goto exit;
1131 }
1132
1133 port = serial->port[port_number];
1134
1135 tport = usb_get_serial_port_data(port);
1136 if (!tport)
1137 goto exit;
1138
1139 switch (function) {
1140 case TI_CODE_DATA_ERROR:
1141 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1142 __func__, port_number, data[1]);
1143 break;
1144
1145 case TI_CODE_MODEM_STATUS:
1146 msr = data[1];
1147 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1148 ti_handle_new_msr(tport, msr);
1149 break;
1150
1151 default:
1152 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1153 __func__, data[1]);
1154 break;
1155 }
1156
1157 exit:
1158 retval = usb_submit_urb(urb, GFP_ATOMIC);
1159 if (retval)
1160 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1161 __func__, retval);
1162 }
1163
1164
1165 static void ti_bulk_in_callback(struct urb *urb)
1166 {
1167 struct ti_port *tport = urb->context;
1168 struct usb_serial_port *port = tport->tp_port;
1169 struct device *dev = &urb->dev->dev;
1170 int status = urb->status;
1171 int retval = 0;
1172 struct tty_struct *tty;
1173
1174 dbg("%s", __func__);
1175
1176 switch (status) {
1177 case 0:
1178 break;
1179 case -ECONNRESET:
1180 case -ENOENT:
1181 case -ESHUTDOWN:
1182 dbg("%s - urb shutting down, %d", __func__, status);
1183 tport->tp_tdev->td_urb_error = 1;
1184 wake_up_interruptible(&tport->tp_write_wait);
1185 return;
1186 default:
1187 dev_err(dev, "%s - nonzero urb status, %d\n",
1188 __func__, status);
1189 tport->tp_tdev->td_urb_error = 1;
1190 wake_up_interruptible(&tport->tp_write_wait);
1191 }
1192
1193 if (status == -EPIPE)
1194 goto exit;
1195
1196 if (status) {
1197 dev_err(dev, "%s - stopping read!\n", __func__);
1198 return;
1199 }
1200
1201 tty = tty_port_tty_get(&port->port);
1202 if (tty) {
1203 if (urb->actual_length) {
1204 usb_serial_debug_data(debug, dev, __func__,
1205 urb->actual_length, urb->transfer_buffer);
1206
1207 if (!tport->tp_is_open)
1208 dbg("%s - port closed, dropping data",
1209 __func__);
1210 else
1211 ti_recv(&urb->dev->dev, tty,
1212 urb->transfer_buffer,
1213 urb->actual_length);
1214 spin_lock(&tport->tp_lock);
1215 tport->tp_icount.rx += urb->actual_length;
1216 spin_unlock(&tport->tp_lock);
1217 }
1218 tty_kref_put(tty);
1219 }
1220
1221 exit:
1222 /* continue to read unless stopping */
1223 spin_lock(&tport->tp_lock);
1224 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1225 urb->dev = port->serial->dev;
1226 retval = usb_submit_urb(urb, GFP_ATOMIC);
1227 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1228 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1229 }
1230 spin_unlock(&tport->tp_lock);
1231 if (retval)
1232 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1233 __func__, retval);
1234 }
1235
1236
1237 static void ti_bulk_out_callback(struct urb *urb)
1238 {
1239 struct ti_port *tport = urb->context;
1240 struct usb_serial_port *port = tport->tp_port;
1241 struct device *dev = &urb->dev->dev;
1242 int status = urb->status;
1243
1244 dbg("%s - port %d", __func__, port->number);
1245
1246 tport->tp_write_urb_in_use = 0;
1247
1248 switch (status) {
1249 case 0:
1250 break;
1251 case -ECONNRESET:
1252 case -ENOENT:
1253 case -ESHUTDOWN:
1254 dbg("%s - urb shutting down, %d", __func__, status);
1255 tport->tp_tdev->td_urb_error = 1;
1256 wake_up_interruptible(&tport->tp_write_wait);
1257 return;
1258 default:
1259 dev_err(dev, "%s - nonzero urb status, %d\n",
1260 __func__, status);
1261 tport->tp_tdev->td_urb_error = 1;
1262 wake_up_interruptible(&tport->tp_write_wait);
1263 }
1264
1265 /* send any buffered data */
1266 ti_send(tport);
1267 }
1268
1269
1270 static void ti_recv(struct device *dev, struct tty_struct *tty,
1271 unsigned char *data, int length)
1272 {
1273 int cnt;
1274
1275 do {
1276 cnt = tty_buffer_request_room(tty, length);
1277 if (cnt < length) {
1278 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1279 __func__, length - cnt);
1280 if (cnt == 0)
1281 break;
1282 }
1283 tty_insert_flip_string(tty, data, cnt);
1284 tty_flip_buffer_push(tty);
1285 data += cnt;
1286 length -= cnt;
1287 } while (length > 0);
1288
1289 }
1290
1291
1292 static void ti_send(struct ti_port *tport)
1293 {
1294 int count, result;
1295 struct usb_serial_port *port = tport->tp_port;
1296 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1297 unsigned long flags;
1298
1299
1300 dbg("%s - port %d", __func__, port->number);
1301
1302 spin_lock_irqsave(&tport->tp_lock, flags);
1303
1304 if (tport->tp_write_urb_in_use)
1305 goto unlock;
1306
1307 count = ti_buf_get(tport->tp_write_buf,
1308 port->write_urb->transfer_buffer,
1309 port->bulk_out_size);
1310
1311 if (count == 0)
1312 goto unlock;
1313
1314 tport->tp_write_urb_in_use = 1;
1315
1316 spin_unlock_irqrestore(&tport->tp_lock, flags);
1317
1318 usb_serial_debug_data(debug, &port->dev, __func__, count,
1319 port->write_urb->transfer_buffer);
1320
1321 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1322 usb_sndbulkpipe(port->serial->dev,
1323 port->bulk_out_endpointAddress),
1324 port->write_urb->transfer_buffer, count,
1325 ti_bulk_out_callback, tport);
1326
1327 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1328 if (result) {
1329 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1330 __func__, result);
1331 tport->tp_write_urb_in_use = 0;
1332 /* TODO: reschedule ti_send */
1333 } else {
1334 spin_lock_irqsave(&tport->tp_lock, flags);
1335 tport->tp_icount.tx += count;
1336 spin_unlock_irqrestore(&tport->tp_lock, flags);
1337 }
1338
1339 /* more room in the buffer for new writes, wakeup */
1340 if (tty)
1341 tty_wakeup(tty);
1342 tty_kref_put(tty);
1343 wake_up_interruptible(&tport->tp_write_wait);
1344 return;
1345 unlock:
1346 spin_unlock_irqrestore(&tport->tp_lock, flags);
1347 tty_kref_put(tty);
1348 return;
1349 }
1350
1351
1352 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1353 {
1354 unsigned long flags;
1355 int status;
1356
1357 status = ti_write_byte(tport->tp_tdev,
1358 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1359 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1360
1361 spin_lock_irqsave(&tport->tp_lock, flags);
1362 if (!status)
1363 tport->tp_shadow_mcr = mcr;
1364 spin_unlock_irqrestore(&tport->tp_lock, flags);
1365
1366 return status;
1367 }
1368
1369
1370 static int ti_get_lsr(struct ti_port *tport)
1371 {
1372 int size, status;
1373 struct ti_device *tdev = tport->tp_tdev;
1374 struct usb_serial_port *port = tport->tp_port;
1375 int port_number = port->number - port->serial->minor;
1376 struct ti_port_status *data;
1377
1378 dbg("%s - port %d", __func__, port->number);
1379
1380 size = sizeof(struct ti_port_status);
1381 data = kmalloc(size, GFP_KERNEL);
1382 if (!data) {
1383 dev_err(&port->dev, "%s - out of memory\n", __func__);
1384 return -ENOMEM;
1385 }
1386
1387 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1388 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1389 if (status) {
1390 dev_err(&port->dev,
1391 "%s - get port status command failed, %d\n",
1392 __func__, status);
1393 goto free_data;
1394 }
1395
1396 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1397
1398 tport->tp_lsr = data->bLSR;
1399
1400 free_data:
1401 kfree(data);
1402 return status;
1403 }
1404
1405
1406 static int ti_get_serial_info(struct ti_port *tport,
1407 struct serial_struct __user *ret_arg)
1408 {
1409 struct usb_serial_port *port = tport->tp_port;
1410 struct serial_struct ret_serial;
1411
1412 if (!ret_arg)
1413 return -EFAULT;
1414
1415 memset(&ret_serial, 0, sizeof(ret_serial));
1416
1417 ret_serial.type = PORT_16550A;
1418 ret_serial.line = port->serial->minor;
1419 ret_serial.port = port->number - port->serial->minor;
1420 ret_serial.flags = tport->tp_flags;
1421 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1422 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1423 ret_serial.closing_wait = tport->tp_closing_wait;
1424
1425 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1426 return -EFAULT;
1427
1428 return 0;
1429 }
1430
1431
1432 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1433 struct serial_struct __user *new_arg)
1434 {
1435 struct serial_struct new_serial;
1436
1437 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1438 return -EFAULT;
1439
1440 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1441 tport->tp_closing_wait = new_serial.closing_wait;
1442
1443 return 0;
1444 }
1445
1446
1447 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1448 {
1449 struct async_icount *icount;
1450 struct tty_struct *tty;
1451 unsigned long flags;
1452
1453 dbg("%s - msr 0x%02X", __func__, msr);
1454
1455 if (msr & TI_MSR_DELTA_MASK) {
1456 spin_lock_irqsave(&tport->tp_lock, flags);
1457 icount = &tport->tp_icount;
1458 if (msr & TI_MSR_DELTA_CTS)
1459 icount->cts++;
1460 if (msr & TI_MSR_DELTA_DSR)
1461 icount->dsr++;
1462 if (msr & TI_MSR_DELTA_CD)
1463 icount->dcd++;
1464 if (msr & TI_MSR_DELTA_RI)
1465 icount->rng++;
1466 wake_up_interruptible(&tport->tp_msr_wait);
1467 spin_unlock_irqrestore(&tport->tp_lock, flags);
1468 }
1469
1470 tport->tp_msr = msr & TI_MSR_MASK;
1471
1472 /* handle CTS flow control */
1473 tty = tty_port_tty_get(&tport->tp_port->port);
1474 if (tty && C_CRTSCTS(tty)) {
1475 if (msr & TI_MSR_CTS) {
1476 tty->hw_stopped = 0;
1477 tty_wakeup(tty);
1478 } else {
1479 tty->hw_stopped = 1;
1480 }
1481 }
1482 tty_kref_put(tty);
1483 }
1484
1485
1486 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1487 {
1488 struct ti_device *tdev = tport->tp_tdev;
1489 struct usb_serial_port *port = tport->tp_port;
1490 wait_queue_t wait;
1491
1492 dbg("%s - port %d", __func__, port->number);
1493
1494 spin_lock_irq(&tport->tp_lock);
1495
1496 /* wait for data to drain from the buffer */
1497 tdev->td_urb_error = 0;
1498 init_waitqueue_entry(&wait, current);
1499 add_wait_queue(&tport->tp_write_wait, &wait);
1500 for (;;) {
1501 set_current_state(TASK_INTERRUPTIBLE);
1502 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1503 || timeout == 0 || signal_pending(current)
1504 || tdev->td_urb_error
1505 || port->serial->disconnected) /* disconnect */
1506 break;
1507 spin_unlock_irq(&tport->tp_lock);
1508 timeout = schedule_timeout(timeout);
1509 spin_lock_irq(&tport->tp_lock);
1510 }
1511 set_current_state(TASK_RUNNING);
1512 remove_wait_queue(&tport->tp_write_wait, &wait);
1513
1514 /* flush any remaining data in the buffer */
1515 if (flush)
1516 ti_buf_clear(tport->tp_write_buf);
1517
1518 spin_unlock_irq(&tport->tp_lock);
1519
1520 mutex_lock(&port->serial->disc_mutex);
1521 /* wait for data to drain from the device */
1522 /* wait for empty tx register, plus 20 ms */
1523 timeout += jiffies;
1524 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1525 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1526 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1527 && !port->serial->disconnected) {
1528 if (ti_get_lsr(tport))
1529 break;
1530 mutex_unlock(&port->serial->disc_mutex);
1531 msleep_interruptible(20);
1532 mutex_lock(&port->serial->disc_mutex);
1533 }
1534 mutex_unlock(&port->serial->disc_mutex);
1535 }
1536
1537
1538 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1539 {
1540 unsigned long flags;
1541
1542 spin_lock_irqsave(&tport->tp_lock, flags);
1543
1544 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1545 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1546
1547 spin_unlock_irqrestore(&tport->tp_lock, flags);
1548 }
1549
1550
1551 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1552 {
1553 struct urb *urb;
1554 int status = 0;
1555 unsigned long flags;
1556
1557 spin_lock_irqsave(&tport->tp_lock, flags);
1558
1559 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1560 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1561 urb = tport->tp_port->read_urb;
1562 spin_unlock_irqrestore(&tport->tp_lock, flags);
1563 urb->complete = ti_bulk_in_callback;
1564 urb->context = tport;
1565 urb->dev = tport->tp_port->serial->dev;
1566 status = usb_submit_urb(urb, GFP_KERNEL);
1567 } else {
1568 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1569 spin_unlock_irqrestore(&tport->tp_lock, flags);
1570 }
1571
1572 return status;
1573 }
1574
1575
1576 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1577 __u16 moduleid, __u16 value, __u8 *data, int size)
1578 {
1579 int status;
1580
1581 status = usb_control_msg(tdev->td_serial->dev,
1582 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1583 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1584 value, moduleid, data, size, 1000);
1585
1586 if (status == size)
1587 status = 0;
1588
1589 if (status > 0)
1590 status = -ECOMM;
1591
1592 return status;
1593 }
1594
1595
1596 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1597 __u16 moduleid, __u16 value, __u8 *data, int size)
1598 {
1599 int status;
1600
1601 status = usb_control_msg(tdev->td_serial->dev,
1602 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1603 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1604 value, moduleid, data, size, 1000);
1605
1606 if (status == size)
1607 status = 0;
1608
1609 if (status > 0)
1610 status = -ECOMM;
1611
1612 return status;
1613 }
1614
1615
1616 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1617 __u8 mask, __u8 byte)
1618 {
1619 int status;
1620 unsigned int size;
1621 struct ti_write_data_bytes *data;
1622 struct device *dev = &tdev->td_serial->dev->dev;
1623
1624 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1625 __func__, addr, mask, byte);
1626
1627 size = sizeof(struct ti_write_data_bytes) + 2;
1628 data = kmalloc(size, GFP_KERNEL);
1629 if (!data) {
1630 dev_err(dev, "%s - out of memory\n", __func__);
1631 return -ENOMEM;
1632 }
1633
1634 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1635 data->bDataType = TI_RW_DATA_BYTE;
1636 data->bDataCounter = 1;
1637 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1638 data->wBaseAddrLo = cpu_to_be16(addr);
1639 data->bData[0] = mask;
1640 data->bData[1] = byte;
1641
1642 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1643 (__u8 *)data, size);
1644
1645 if (status < 0)
1646 dev_err(dev, "%s - failed, %d\n", __func__, status);
1647
1648 kfree(data);
1649
1650 return status;
1651 }
1652
1653 static int ti_do_download(struct usb_device *dev, int pipe,
1654 u8 *buffer, int size)
1655 {
1656 int pos;
1657 u8 cs = 0;
1658 int done;
1659 struct ti_firmware_header *header;
1660 int status = 0;
1661 int len;
1662
1663 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1664 cs = (__u8)(cs + buffer[pos]);
1665
1666 header = (struct ti_firmware_header *)buffer;
1667 header->wLength = cpu_to_le16((__u16)(size
1668 - sizeof(struct ti_firmware_header)));
1669 header->bCheckSum = cs;
1670
1671 dbg("%s - downloading firmware", __func__);
1672 for (pos = 0; pos < size; pos += done) {
1673 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1674 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1675 &done, 1000);
1676 if (status)
1677 break;
1678 }
1679 return status;
1680 }
1681
1682 static int ti_download_firmware(struct ti_device *tdev)
1683 {
1684 int status;
1685 int buffer_size;
1686 __u8 *buffer;
1687 struct usb_device *dev = tdev->td_serial->dev;
1688 unsigned int pipe = usb_sndbulkpipe(dev,
1689 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1690 const struct firmware *fw_p;
1691 char buf[32];
1692
1693 /* try ID specific firmware first, then try generic firmware */
1694 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1695 dev->descriptor.idProduct);
1696 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1697 buf[0] = '\0';
1698 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1699 switch (dev->descriptor.idProduct) {
1700 case MTS_CDMA_PRODUCT_ID:
1701 strcpy(buf, "mts_cdma.fw");
1702 break;
1703 case MTS_GSM_PRODUCT_ID:
1704 strcpy(buf, "mts_gsm.fw");
1705 break;
1706 case MTS_EDGE_PRODUCT_ID:
1707 strcpy(buf, "mts_edge.fw");
1708 break;
1709 }
1710 }
1711 if (buf[0] == '\0') {
1712 if (tdev->td_is_3410)
1713 strcpy(buf, "ti_3410.fw");
1714 else
1715 strcpy(buf, "ti_5052.fw");
1716 }
1717 status = request_firmware(&fw_p, buf, &dev->dev);
1718 }
1719 if (status) {
1720 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1721 return -ENOENT;
1722 }
1723 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1724 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1725 return -ENOENT;
1726 }
1727
1728 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1729 buffer = kmalloc(buffer_size, GFP_KERNEL);
1730 if (buffer) {
1731 memcpy(buffer, fw_p->data, fw_p->size);
1732 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1733 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1734 kfree(buffer);
1735 } else {
1736 status = -ENOMEM;
1737 }
1738 release_firmware(fw_p);
1739 if (status) {
1740 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1741 __func__, status);
1742 return status;
1743 }
1744
1745 dbg("%s - download successful", __func__);
1746
1747 return 0;
1748 }
1749
1750
1751 /* Circular Buffer Functions */
1752
1753 /*
1754 * ti_buf_alloc
1755 *
1756 * Allocate a circular buffer and all associated memory.
1757 */
1758
1759 static struct circ_buf *ti_buf_alloc(void)
1760 {
1761 struct circ_buf *cb;
1762
1763 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1764 if (cb == NULL)
1765 return NULL;
1766
1767 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1768 if (cb->buf == NULL) {
1769 kfree(cb);
1770 return NULL;
1771 }
1772
1773 ti_buf_clear(cb);
1774
1775 return cb;
1776 }
1777
1778
1779 /*
1780 * ti_buf_free
1781 *
1782 * Free the buffer and all associated memory.
1783 */
1784
1785 static void ti_buf_free(struct circ_buf *cb)
1786 {
1787 kfree(cb->buf);
1788 kfree(cb);
1789 }
1790
1791
1792 /*
1793 * ti_buf_clear
1794 *
1795 * Clear out all data in the circular buffer.
1796 */
1797
1798 static void ti_buf_clear(struct circ_buf *cb)
1799 {
1800 cb->head = cb->tail = 0;
1801 }
1802
1803
1804 /*
1805 * ti_buf_data_avail
1806 *
1807 * Return the number of bytes of data available in the circular
1808 * buffer.
1809 */
1810
1811 static int ti_buf_data_avail(struct circ_buf *cb)
1812 {
1813 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1814 }
1815
1816
1817 /*
1818 * ti_buf_space_avail
1819 *
1820 * Return the number of bytes of space available in the circular
1821 * buffer.
1822 */
1823
1824 static int ti_buf_space_avail(struct circ_buf *cb)
1825 {
1826 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1827 }
1828
1829
1830 /*
1831 * ti_buf_put
1832 *
1833 * Copy data data from a user buffer and put it into the circular buffer.
1834 * Restrict to the amount of space available.
1835 *
1836 * Return the number of bytes copied.
1837 */
1838
1839 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1840 {
1841 int c, ret = 0;
1842
1843 while (1) {
1844 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1845 if (count < c)
1846 c = count;
1847 if (c <= 0)
1848 break;
1849 memcpy(cb->buf + cb->head, buf, c);
1850 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1851 buf += c;
1852 count -= c;
1853 ret += c;
1854 }
1855
1856 return ret;
1857 }
1858
1859
1860 /*
1861 * ti_buf_get
1862 *
1863 * Get data from the circular buffer and copy to the given buffer.
1864 * Restrict to the amount of data available.
1865 *
1866 * Return the number of bytes copied.
1867 */
1868
1869 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1870 {
1871 int c, ret = 0;
1872
1873 while (1) {
1874 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1875 if (count < c)
1876 c = count;
1877 if (c <= 0)
1878 break;
1879 memcpy(buf, cb->buf + cb->tail, c);
1880 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1881 buf += c;
1882 count -= c;
1883 ret += c;
1884 }
1885
1886 return ret;
1887 }
Linux with added FPC-III support