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USB: usb-serial: replace shutdown with disconnect, release
[linux-2.6.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob991d8232e3765c39de562ec8e09181d0e8d4c547
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 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
195 };
196
197 static struct usb_device_id ti_id_table_combined[14+2*TI_EXTRA_VID_PID_COUNT+1] = {
198 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
199 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
200 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
202 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
203 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
204 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
205 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
206 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
207 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
208 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
209 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
210 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
211 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
212 { }
213 };
214
215 static struct usb_driver ti_usb_driver = {
216 .name = "ti_usb_3410_5052",
217 .probe = usb_serial_probe,
218 .disconnect = usb_serial_disconnect,
219 .id_table = ti_id_table_combined,
220 .no_dynamic_id = 1,
221 };
222
223 static struct usb_serial_driver ti_1port_device = {
224 .driver = {
225 .owner = THIS_MODULE,
226 .name = "ti_usb_3410_5052_1",
227 },
228 .description = "TI USB 3410 1 port adapter",
229 .usb_driver = &ti_usb_driver,
230 .id_table = ti_id_table_3410,
231 .num_ports = 1,
232 .attach = ti_startup,
233 .release = ti_release,
234 .open = ti_open,
235 .close = ti_close,
236 .write = ti_write,
237 .write_room = ti_write_room,
238 .chars_in_buffer = ti_chars_in_buffer,
239 .throttle = ti_throttle,
240 .unthrottle = ti_unthrottle,
241 .ioctl = ti_ioctl,
242 .set_termios = ti_set_termios,
243 .tiocmget = ti_tiocmget,
244 .tiocmset = ti_tiocmset,
245 .break_ctl = ti_break,
246 .read_int_callback = ti_interrupt_callback,
247 .read_bulk_callback = ti_bulk_in_callback,
248 .write_bulk_callback = ti_bulk_out_callback,
249 };
250
251 static struct usb_serial_driver ti_2port_device = {
252 .driver = {
253 .owner = THIS_MODULE,
254 .name = "ti_usb_3410_5052_2",
255 },
256 .description = "TI USB 5052 2 port adapter",
257 .usb_driver = &ti_usb_driver,
258 .id_table = ti_id_table_5052,
259 .num_ports = 2,
260 .attach = ti_startup,
261 .release = ti_release,
262 .open = ti_open,
263 .close = ti_close,
264 .write = ti_write,
265 .write_room = ti_write_room,
266 .chars_in_buffer = ti_chars_in_buffer,
267 .throttle = ti_throttle,
268 .unthrottle = ti_unthrottle,
269 .ioctl = ti_ioctl,
270 .set_termios = ti_set_termios,
271 .tiocmget = ti_tiocmget,
272 .tiocmset = ti_tiocmset,
273 .break_ctl = ti_break,
274 .read_int_callback = ti_interrupt_callback,
275 .read_bulk_callback = ti_bulk_in_callback,
276 .write_bulk_callback = ti_bulk_out_callback,
277 };
278
279
280 /* Module */
281
282 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
283 MODULE_DESCRIPTION(TI_DRIVER_DESC);
284 MODULE_VERSION(TI_DRIVER_VERSION);
285 MODULE_LICENSE("GPL");
286
287 MODULE_FIRMWARE("ti_3410.fw");
288 MODULE_FIRMWARE("ti_5052.fw");
289 MODULE_FIRMWARE("mts_cdma.fw");
290 MODULE_FIRMWARE("mts_gsm.fw");
291 MODULE_FIRMWARE("mts_edge.fw");
292
293 module_param(debug, bool, S_IRUGO | S_IWUSR);
294 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
295
296 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
297 MODULE_PARM_DESC(closing_wait,
298 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
299
300 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
301 MODULE_PARM_DESC(vendor_3410,
302 "Vendor ids for 3410 based devices, 1-5 short integers");
303 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
304 MODULE_PARM_DESC(product_3410,
305 "Product ids for 3410 based devices, 1-5 short integers");
306 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
307 MODULE_PARM_DESC(vendor_5052,
308 "Vendor ids for 5052 based devices, 1-5 short integers");
309 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
310 MODULE_PARM_DESC(product_5052,
311 "Product ids for 5052 based devices, 1-5 short integers");
312
313 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
314
315
316 /* Functions */
317
318 static int __init ti_init(void)
319 {
320 int i, j, c;
321 int ret;
322
323 /* insert extra vendor and product ids */
324 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
325 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
326 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
327 ti_id_table_3410[j].idVendor = vendor_3410[i];
328 ti_id_table_3410[j].idProduct = product_3410[i];
329 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
330 ti_id_table_combined[c].idVendor = vendor_3410[i];
331 ti_id_table_combined[c].idProduct = product_3410[i];
332 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
333 }
334 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
335 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
336 ti_id_table_5052[j].idVendor = vendor_5052[i];
337 ti_id_table_5052[j].idProduct = product_5052[i];
338 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
339 ti_id_table_combined[c].idVendor = vendor_5052[i];
340 ti_id_table_combined[c].idProduct = product_5052[i];
341 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
342 }
343
344 ret = usb_serial_register(&ti_1port_device);
345 if (ret)
346 goto failed_1port;
347 ret = usb_serial_register(&ti_2port_device);
348 if (ret)
349 goto failed_2port;
350
351 ret = usb_register(&ti_usb_driver);
352 if (ret)
353 goto failed_usb;
354
355 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
356 TI_DRIVER_DESC "\n");
357
358 return 0;
359
360 failed_usb:
361 usb_serial_deregister(&ti_2port_device);
362 failed_2port:
363 usb_serial_deregister(&ti_1port_device);
364 failed_1port:
365 return ret;
366 }
367
368
369 static void __exit ti_exit(void)
370 {
371 usb_serial_deregister(&ti_1port_device);
372 usb_serial_deregister(&ti_2port_device);
373 usb_deregister(&ti_usb_driver);
374 }
375
376
377 module_init(ti_init);
378 module_exit(ti_exit);
379
380
381 static int ti_startup(struct usb_serial *serial)
382 {
383 struct ti_device *tdev;
384 struct ti_port *tport;
385 struct usb_device *dev = serial->dev;
386 int status;
387 int i;
388
389
390 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
391 __func__, le16_to_cpu(dev->descriptor.idProduct),
392 dev->descriptor.bNumConfigurations,
393 dev->actconfig->desc.bConfigurationValue);
394
395 /* create device structure */
396 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
397 if (tdev == NULL) {
398 dev_err(&dev->dev, "%s - out of memory\n", __func__);
399 return -ENOMEM;
400 }
401 mutex_init(&tdev->td_open_close_lock);
402 tdev->td_serial = serial;
403 usb_set_serial_data(serial, tdev);
404
405 /* determine device type */
406 if (usb_match_id(serial->interface, ti_id_table_3410))
407 tdev->td_is_3410 = 1;
408 dbg("%s - device type is %s", __func__,
409 tdev->td_is_3410 ? "3410" : "5052");
410
411 /* if we have only 1 configuration, download firmware */
412 if (dev->descriptor.bNumConfigurations == 1) {
413 if ((status = ti_download_firmware(tdev)) != 0)
414 goto free_tdev;
415
416 /* 3410 must be reset, 5052 resets itself */
417 if (tdev->td_is_3410) {
418 msleep_interruptible(100);
419 usb_reset_device(dev);
420 }
421
422 status = -ENODEV;
423 goto free_tdev;
424 }
425
426 /* the second configuration must be set */
427 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
428 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
429 status = status ? status : -ENODEV;
430 goto free_tdev;
431 }
432
433 /* set up port structures */
434 for (i = 0; i < serial->num_ports; ++i) {
435 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
436 if (tport == NULL) {
437 dev_err(&dev->dev, "%s - out of memory\n", __func__);
438 status = -ENOMEM;
439 goto free_tports;
440 }
441 spin_lock_init(&tport->tp_lock);
442 tport->tp_uart_base_addr = (i == 0 ?
443 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
444 tport->tp_closing_wait = closing_wait;
445 init_waitqueue_head(&tport->tp_msr_wait);
446 init_waitqueue_head(&tport->tp_write_wait);
447 tport->tp_write_buf = ti_buf_alloc();
448 if (tport->tp_write_buf == NULL) {
449 dev_err(&dev->dev, "%s - out of memory\n", __func__);
450 kfree(tport);
451 status = -ENOMEM;
452 goto free_tports;
453 }
454 tport->tp_port = serial->port[i];
455 tport->tp_tdev = tdev;
456 usb_set_serial_port_data(serial->port[i], tport);
457 tport->tp_uart_mode = 0; /* default is RS232 */
458 }
459
460 return 0;
461
462 free_tports:
463 for (--i; i >= 0; --i) {
464 tport = usb_get_serial_port_data(serial->port[i]);
465 ti_buf_free(tport->tp_write_buf);
466 kfree(tport);
467 usb_set_serial_port_data(serial->port[i], NULL);
468 }
469 free_tdev:
470 kfree(tdev);
471 usb_set_serial_data(serial, NULL);
472 return status;
473 }
474
475
476 static void ti_release(struct usb_serial *serial)
477 {
478 int i;
479 struct ti_device *tdev = usb_get_serial_data(serial);
480 struct ti_port *tport;
481
482 dbg("%s", __func__);
483
484 for (i = 0; i < serial->num_ports; ++i) {
485 tport = usb_get_serial_port_data(serial->port[i]);
486 if (tport) {
487 ti_buf_free(tport->tp_write_buf);
488 kfree(tport);
489 }
490 }
491
492 kfree(tdev);
493 }
494
495
496 static int ti_open(struct tty_struct *tty,
497 struct usb_serial_port *port, struct file *file)
498 {
499 struct ti_port *tport = usb_get_serial_port_data(port);
500 struct ti_device *tdev;
501 struct usb_device *dev;
502 struct urb *urb;
503 int port_number;
504 int status;
505 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
506 TI_PIPE_TIMEOUT_ENABLE |
507 (TI_TRANSFER_TIMEOUT << 2));
508
509 dbg("%s - port %d", __func__, port->number);
510
511 if (tport == NULL)
512 return -ENODEV;
513
514 dev = port->serial->dev;
515 tdev = tport->tp_tdev;
516
517 /* only one open on any port on a device at a time */
518 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
519 return -ERESTARTSYS;
520
521 port_number = port->number - port->serial->minor;
522
523 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
524
525 tport->tp_msr = 0;
526 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
527
528 /* start interrupt urb the first time a port is opened on this device */
529 if (tdev->td_open_port_count == 0) {
530 dbg("%s - start interrupt in urb", __func__);
531 urb = tdev->td_serial->port[0]->interrupt_in_urb;
532 if (!urb) {
533 dev_err(&port->dev, "%s - no interrupt urb\n",
534 __func__);
535 status = -EINVAL;
536 goto release_lock;
537 }
538 urb->complete = ti_interrupt_callback;
539 urb->context = tdev;
540 urb->dev = dev;
541 status = usb_submit_urb(urb, GFP_KERNEL);
542 if (status) {
543 dev_err(&port->dev,
544 "%s - submit interrupt urb failed, %d\n",
545 __func__, status);
546 goto release_lock;
547 }
548 }
549
550 if (tty)
551 ti_set_termios(tty, port, tty->termios);
552
553 dbg("%s - sending TI_OPEN_PORT", __func__);
554 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
555 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
556 if (status) {
557 dev_err(&port->dev, "%s - cannot send open command, %d\n",
558 __func__, status);
559 goto unlink_int_urb;
560 }
561
562 dbg("%s - sending TI_START_PORT", __func__);
563 status = ti_command_out_sync(tdev, TI_START_PORT,
564 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
565 if (status) {
566 dev_err(&port->dev, "%s - cannot send start command, %d\n",
567 __func__, status);
568 goto unlink_int_urb;
569 }
570
571 dbg("%s - sending TI_PURGE_PORT", __func__);
572 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
573 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
574 if (status) {
575 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
576 __func__, status);
577 goto unlink_int_urb;
578 }
579 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
580 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
581 if (status) {
582 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
583 __func__, status);
584 goto unlink_int_urb;
585 }
586
587 /* reset the data toggle on the bulk endpoints to work around bug in
588 * host controllers where things get out of sync some times */
589 usb_clear_halt(dev, port->write_urb->pipe);
590 usb_clear_halt(dev, port->read_urb->pipe);
591
592 if (tty)
593 ti_set_termios(tty, port, tty->termios);
594
595 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
596 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
597 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
598 if (status) {
599 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
600 __func__, status);
601 goto unlink_int_urb;
602 }
603
604 dbg("%s - sending TI_START_PORT (2)", __func__);
605 status = ti_command_out_sync(tdev, TI_START_PORT,
606 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
607 if (status) {
608 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
609 __func__, status);
610 goto unlink_int_urb;
611 }
612
613 /* start read urb */
614 dbg("%s - start read urb", __func__);
615 urb = port->read_urb;
616 if (!urb) {
617 dev_err(&port->dev, "%s - no read urb\n", __func__);
618 status = -EINVAL;
619 goto unlink_int_urb;
620 }
621 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
622 urb->complete = ti_bulk_in_callback;
623 urb->context = tport;
624 urb->dev = dev;
625 status = usb_submit_urb(urb, GFP_KERNEL);
626 if (status) {
627 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
628 __func__, status);
629 goto unlink_int_urb;
630 }
631
632 tport->tp_is_open = 1;
633 ++tdev->td_open_port_count;
634
635 goto release_lock;
636
637 unlink_int_urb:
638 if (tdev->td_open_port_count == 0)
639 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
640 release_lock:
641 mutex_unlock(&tdev->td_open_close_lock);
642 dbg("%s - exit %d", __func__, status);
643 return status;
644 }
645
646
647 static void ti_close(struct usb_serial_port *port)
648 {
649 struct ti_device *tdev;
650 struct ti_port *tport;
651 int port_number;
652 int status;
653 int do_unlock;
654
655 dbg("%s - port %d", __func__, port->number);
656
657 tdev = usb_get_serial_data(port->serial);
658 tport = usb_get_serial_port_data(port);
659 if (tdev == NULL || tport == NULL)
660 return;
661
662 tport->tp_is_open = 0;
663
664 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
665
666 usb_kill_urb(port->read_urb);
667 usb_kill_urb(port->write_urb);
668 tport->tp_write_urb_in_use = 0;
669
670 port_number = port->number - port->serial->minor;
671
672 dbg("%s - sending TI_CLOSE_PORT", __func__);
673 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
674 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
675 if (status)
676 dev_err(&port->dev,
677 "%s - cannot send close port command, %d\n"
678 , __func__, status);
679
680 /* if mutex_lock is interrupted, continue anyway */
681 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
682 --tport->tp_tdev->td_open_port_count;
683 if (tport->tp_tdev->td_open_port_count <= 0) {
684 /* last port is closed, shut down interrupt urb */
685 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
686 tport->tp_tdev->td_open_port_count = 0;
687 }
688 if (do_unlock)
689 mutex_unlock(&tdev->td_open_close_lock);
690
691 dbg("%s - exit", __func__);
692 }
693
694
695 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
696 const unsigned char *data, int count)
697 {
698 struct ti_port *tport = usb_get_serial_port_data(port);
699 unsigned long flags;
700
701 dbg("%s - port %d", __func__, port->number);
702
703 if (count == 0) {
704 dbg("%s - write request of 0 bytes", __func__);
705 return 0;
706 }
707
708 if (tport == NULL || !tport->tp_is_open)
709 return -ENODEV;
710
711 spin_lock_irqsave(&tport->tp_lock, flags);
712 count = ti_buf_put(tport->tp_write_buf, data, count);
713 spin_unlock_irqrestore(&tport->tp_lock, flags);
714
715 ti_send(tport);
716
717 return count;
718 }
719
720
721 static int ti_write_room(struct tty_struct *tty)
722 {
723 struct usb_serial_port *port = tty->driver_data;
724 struct ti_port *tport = usb_get_serial_port_data(port);
725 int room = 0;
726 unsigned long flags;
727
728 dbg("%s - port %d", __func__, port->number);
729
730 if (tport == NULL)
731 return -ENODEV;
732
733 spin_lock_irqsave(&tport->tp_lock, flags);
734 room = ti_buf_space_avail(tport->tp_write_buf);
735 spin_unlock_irqrestore(&tport->tp_lock, flags);
736
737 dbg("%s - returns %d", __func__, room);
738 return room;
739 }
740
741
742 static int ti_chars_in_buffer(struct tty_struct *tty)
743 {
744 struct usb_serial_port *port = tty->driver_data;
745 struct ti_port *tport = usb_get_serial_port_data(port);
746 int chars = 0;
747 unsigned long flags;
748
749 dbg("%s - port %d", __func__, port->number);
750
751 if (tport == NULL)
752 return -ENODEV;
753
754 spin_lock_irqsave(&tport->tp_lock, flags);
755 chars = ti_buf_data_avail(tport->tp_write_buf);
756 spin_unlock_irqrestore(&tport->tp_lock, flags);
757
758 dbg("%s - returns %d", __func__, chars);
759 return chars;
760 }
761
762
763 static void ti_throttle(struct tty_struct *tty)
764 {
765 struct usb_serial_port *port = tty->driver_data;
766 struct ti_port *tport = usb_get_serial_port_data(port);
767
768 dbg("%s - port %d", __func__, port->number);
769
770 if (tport == NULL)
771 return;
772
773 if (I_IXOFF(tty) || C_CRTSCTS(tty))
774 ti_stop_read(tport, tty);
775
776 }
777
778
779 static void ti_unthrottle(struct tty_struct *tty)
780 {
781 struct usb_serial_port *port = tty->driver_data;
782 struct ti_port *tport = usb_get_serial_port_data(port);
783 int status;
784
785 dbg("%s - port %d", __func__, port->number);
786
787 if (tport == NULL)
788 return;
789
790 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
791 status = ti_restart_read(tport, tty);
792 if (status)
793 dev_err(&port->dev, "%s - cannot restart read, %d\n",
794 __func__, status);
795 }
796 }
797
798
799 static int ti_ioctl(struct tty_struct *tty, struct file *file,
800 unsigned int cmd, unsigned long arg)
801 {
802 struct usb_serial_port *port = tty->driver_data;
803 struct ti_port *tport = usb_get_serial_port_data(port);
804 struct async_icount cnow;
805 struct async_icount cprev;
806
807 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
808
809 if (tport == NULL)
810 return -ENODEV;
811
812 switch (cmd) {
813 case TIOCGSERIAL:
814 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
815 return ti_get_serial_info(tport,
816 (struct serial_struct __user *)arg);
817 case TIOCSSERIAL:
818 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
819 return ti_set_serial_info(tty, tport,
820 (struct serial_struct __user *)arg);
821 case TIOCMIWAIT:
822 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
823 cprev = tport->tp_icount;
824 while (1) {
825 interruptible_sleep_on(&tport->tp_msr_wait);
826 if (signal_pending(current))
827 return -ERESTARTSYS;
828 cnow = tport->tp_icount;
829 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
830 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
831 return -EIO; /* no change => error */
832 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
833 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
834 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
835 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
836 return 0;
837 cprev = cnow;
838 }
839 break;
840 case TIOCGICOUNT:
841 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
842 __func__, port->number,
843 tport->tp_icount.rx, tport->tp_icount.tx);
844 if (copy_to_user((void __user *)arg, &tport->tp_icount,
845 sizeof(tport->tp_icount)))
846 return -EFAULT;
847 return 0;
848 }
849 return -ENOIOCTLCMD;
850 }
851
852
853 static void ti_set_termios(struct tty_struct *tty,
854 struct usb_serial_port *port, struct ktermios *old_termios)
855 {
856 struct ti_port *tport = usb_get_serial_port_data(port);
857 struct ti_uart_config *config;
858 tcflag_t cflag, iflag;
859 int baud;
860 int status;
861 int port_number = port->number - port->serial->minor;
862 unsigned int mcr;
863
864 dbg("%s - port %d", __func__, port->number);
865
866 cflag = tty->termios->c_cflag;
867 iflag = tty->termios->c_iflag;
868
869 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
870 dbg("%s - old clfag %08x, old iflag %08x", __func__,
871 old_termios->c_cflag, old_termios->c_iflag);
872
873 if (tport == NULL)
874 return;
875
876 config = kmalloc(sizeof(*config), GFP_KERNEL);
877 if (!config) {
878 dev_err(&port->dev, "%s - out of memory\n", __func__);
879 return;
880 }
881
882 config->wFlags = 0;
883
884 /* these flags must be set */
885 config->wFlags |= TI_UART_ENABLE_MS_INTS;
886 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
887 config->bUartMode = (__u8)(tport->tp_uart_mode);
888
889 switch (cflag & CSIZE) {
890 case CS5:
891 config->bDataBits = TI_UART_5_DATA_BITS;
892 break;
893 case CS6:
894 config->bDataBits = TI_UART_6_DATA_BITS;
895 break;
896 case CS7:
897 config->bDataBits = TI_UART_7_DATA_BITS;
898 break;
899 default:
900 case CS8:
901 config->bDataBits = TI_UART_8_DATA_BITS;
902 break;
903 }
904
905 /* CMSPAR isn't supported by this driver */
906 tty->termios->c_cflag &= ~CMSPAR;
907
908 if (cflag & PARENB) {
909 if (cflag & PARODD) {
910 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
911 config->bParity = TI_UART_ODD_PARITY;
912 } else {
913 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
914 config->bParity = TI_UART_EVEN_PARITY;
915 }
916 } else {
917 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
918 config->bParity = TI_UART_NO_PARITY;
919 }
920
921 if (cflag & CSTOPB)
922 config->bStopBits = TI_UART_2_STOP_BITS;
923 else
924 config->bStopBits = TI_UART_1_STOP_BITS;
925
926 if (cflag & CRTSCTS) {
927 /* RTS flow control must be off to drop RTS for baud rate B0 */
928 if ((cflag & CBAUD) != B0)
929 config->wFlags |= TI_UART_ENABLE_RTS_IN;
930 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
931 } else {
932 tty->hw_stopped = 0;
933 ti_restart_read(tport, tty);
934 }
935
936 if (I_IXOFF(tty) || I_IXON(tty)) {
937 config->cXon = START_CHAR(tty);
938 config->cXoff = STOP_CHAR(tty);
939
940 if (I_IXOFF(tty))
941 config->wFlags |= TI_UART_ENABLE_X_IN;
942 else
943 ti_restart_read(tport, tty);
944
945 if (I_IXON(tty))
946 config->wFlags |= TI_UART_ENABLE_X_OUT;
947 }
948
949 baud = tty_get_baud_rate(tty);
950 if (!baud)
951 baud = 9600;
952 if (tport->tp_tdev->td_is_3410)
953 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
954 else
955 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
956
957 /* FIXME: Should calculate resulting baud here and report it back */
958 if ((cflag & CBAUD) != B0)
959 tty_encode_baud_rate(tty, baud, baud);
960
961 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
962 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
963
964 cpu_to_be16s(&config->wBaudRate);
965 cpu_to_be16s(&config->wFlags);
966
967 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
968 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
969 sizeof(*config));
970 if (status)
971 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
972 __func__, port_number, status);
973
974 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
975 mcr = tport->tp_shadow_mcr;
976 /* if baud rate is B0, clear RTS and DTR */
977 if ((cflag & CBAUD) == B0)
978 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
979 status = ti_set_mcr(tport, mcr);
980 if (status)
981 dev_err(&port->dev,
982 "%s - cannot set modem control on port %d, %d\n",
983 __func__, port_number, status);
984
985 kfree(config);
986 }
987
988
989 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
990 {
991 struct usb_serial_port *port = tty->driver_data;
992 struct ti_port *tport = usb_get_serial_port_data(port);
993 unsigned int result;
994 unsigned int msr;
995 unsigned int mcr;
996 unsigned long flags;
997
998 dbg("%s - port %d", __func__, port->number);
999
1000 if (tport == NULL)
1001 return -ENODEV;
1002
1003 spin_lock_irqsave(&tport->tp_lock, flags);
1004 msr = tport->tp_msr;
1005 mcr = tport->tp_shadow_mcr;
1006 spin_unlock_irqrestore(&tport->tp_lock, flags);
1007
1008 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1009 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1010 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1011 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1012 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1013 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1014 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1015
1016 dbg("%s - 0x%04X", __func__, result);
1017
1018 return result;
1019 }
1020
1021
1022 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1023 unsigned int set, unsigned int clear)
1024 {
1025 struct usb_serial_port *port = tty->driver_data;
1026 struct ti_port *tport = usb_get_serial_port_data(port);
1027 unsigned int mcr;
1028 unsigned long flags;
1029
1030 dbg("%s - port %d", __func__, port->number);
1031
1032 if (tport == NULL)
1033 return -ENODEV;
1034
1035 spin_lock_irqsave(&tport->tp_lock, flags);
1036 mcr = tport->tp_shadow_mcr;
1037
1038 if (set & TIOCM_RTS)
1039 mcr |= TI_MCR_RTS;
1040 if (set & TIOCM_DTR)
1041 mcr |= TI_MCR_DTR;
1042 if (set & TIOCM_LOOP)
1043 mcr |= TI_MCR_LOOP;
1044
1045 if (clear & TIOCM_RTS)
1046 mcr &= ~TI_MCR_RTS;
1047 if (clear & TIOCM_DTR)
1048 mcr &= ~TI_MCR_DTR;
1049 if (clear & TIOCM_LOOP)
1050 mcr &= ~TI_MCR_LOOP;
1051 spin_unlock_irqrestore(&tport->tp_lock, flags);
1052
1053 return ti_set_mcr(tport, mcr);
1054 }
1055
1056
1057 static void ti_break(struct tty_struct *tty, int break_state)
1058 {
1059 struct usb_serial_port *port = tty->driver_data;
1060 struct ti_port *tport = usb_get_serial_port_data(port);
1061 int status;
1062
1063 dbg("%s - state = %d", __func__, break_state);
1064
1065 if (tport == NULL)
1066 return;
1067
1068 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1069
1070 status = ti_write_byte(tport->tp_tdev,
1071 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1072 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1073
1074 if (status)
1075 dbg("%s - error setting break, %d", __func__, status);
1076 }
1077
1078
1079 static void ti_interrupt_callback(struct urb *urb)
1080 {
1081 struct ti_device *tdev = urb->context;
1082 struct usb_serial_port *port;
1083 struct usb_serial *serial = tdev->td_serial;
1084 struct ti_port *tport;
1085 struct device *dev = &urb->dev->dev;
1086 unsigned char *data = urb->transfer_buffer;
1087 int length = urb->actual_length;
1088 int port_number;
1089 int function;
1090 int status = urb->status;
1091 int retval;
1092 __u8 msr;
1093
1094 dbg("%s", __func__);
1095
1096 switch (status) {
1097 case 0:
1098 break;
1099 case -ECONNRESET:
1100 case -ENOENT:
1101 case -ESHUTDOWN:
1102 dbg("%s - urb shutting down, %d", __func__, status);
1103 tdev->td_urb_error = 1;
1104 return;
1105 default:
1106 dev_err(dev, "%s - nonzero urb status, %d\n",
1107 __func__, status);
1108 tdev->td_urb_error = 1;
1109 goto exit;
1110 }
1111
1112 if (length != 2) {
1113 dbg("%s - bad packet size, %d", __func__, length);
1114 goto exit;
1115 }
1116
1117 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1118 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1119 goto exit;
1120 }
1121
1122 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1123 function = TI_GET_FUNC_FROM_CODE(data[0]);
1124
1125 dbg("%s - port_number %d, function %d, data 0x%02X",
1126 __func__, port_number, function, data[1]);
1127
1128 if (port_number >= serial->num_ports) {
1129 dev_err(dev, "%s - bad port number, %d\n",
1130 __func__, port_number);
1131 goto exit;
1132 }
1133
1134 port = serial->port[port_number];
1135
1136 tport = usb_get_serial_port_data(port);
1137 if (!tport)
1138 goto exit;
1139
1140 switch (function) {
1141 case TI_CODE_DATA_ERROR:
1142 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1143 __func__, port_number, data[1]);
1144 break;
1145
1146 case TI_CODE_MODEM_STATUS:
1147 msr = data[1];
1148 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1149 ti_handle_new_msr(tport, msr);
1150 break;
1151
1152 default:
1153 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1154 __func__, data[1]);
1155 break;
1156 }
1157
1158 exit:
1159 retval = usb_submit_urb(urb, GFP_ATOMIC);
1160 if (retval)
1161 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1162 __func__, retval);
1163 }
1164
1165
1166 static void ti_bulk_in_callback(struct urb *urb)
1167 {
1168 struct ti_port *tport = urb->context;
1169 struct usb_serial_port *port = tport->tp_port;
1170 struct device *dev = &urb->dev->dev;
1171 int status = urb->status;
1172 int retval = 0;
1173 struct tty_struct *tty;
1174
1175 dbg("%s", __func__);
1176
1177 switch (status) {
1178 case 0:
1179 break;
1180 case -ECONNRESET:
1181 case -ENOENT:
1182 case -ESHUTDOWN:
1183 dbg("%s - urb shutting down, %d", __func__, status);
1184 tport->tp_tdev->td_urb_error = 1;
1185 wake_up_interruptible(&tport->tp_write_wait);
1186 return;
1187 default:
1188 dev_err(dev, "%s - nonzero urb status, %d\n",
1189 __func__, status);
1190 tport->tp_tdev->td_urb_error = 1;
1191 wake_up_interruptible(&tport->tp_write_wait);
1192 }
1193
1194 if (status == -EPIPE)
1195 goto exit;
1196
1197 if (status) {
1198 dev_err(dev, "%s - stopping read!\n", __func__);
1199 return;
1200 }
1201
1202 tty = tty_port_tty_get(&port->port);
1203 if (tty) {
1204 if (urb->actual_length) {
1205 usb_serial_debug_data(debug, dev, __func__,
1206 urb->actual_length, urb->transfer_buffer);
1207
1208 if (!tport->tp_is_open)
1209 dbg("%s - port closed, dropping data",
1210 __func__);
1211 else
1212 ti_recv(&urb->dev->dev, tty,
1213 urb->transfer_buffer,
1214 urb->actual_length);
1215 spin_lock(&tport->tp_lock);
1216 tport->tp_icount.rx += urb->actual_length;
1217 spin_unlock(&tport->tp_lock);
1218 }
1219 tty_kref_put(tty);
1220 }
1221
1222 exit:
1223 /* continue to read unless stopping */
1224 spin_lock(&tport->tp_lock);
1225 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1226 urb->dev = port->serial->dev;
1227 retval = usb_submit_urb(urb, GFP_ATOMIC);
1228 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1229 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1230 }
1231 spin_unlock(&tport->tp_lock);
1232 if (retval)
1233 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1234 __func__, retval);
1235 }
1236
1237
1238 static void ti_bulk_out_callback(struct urb *urb)
1239 {
1240 struct ti_port *tport = urb->context;
1241 struct usb_serial_port *port = tport->tp_port;
1242 struct device *dev = &urb->dev->dev;
1243 int status = urb->status;
1244
1245 dbg("%s - port %d", __func__, port->number);
1246
1247 tport->tp_write_urb_in_use = 0;
1248
1249 switch (status) {
1250 case 0:
1251 break;
1252 case -ECONNRESET:
1253 case -ENOENT:
1254 case -ESHUTDOWN:
1255 dbg("%s - urb shutting down, %d", __func__, status);
1256 tport->tp_tdev->td_urb_error = 1;
1257 wake_up_interruptible(&tport->tp_write_wait);
1258 return;
1259 default:
1260 dev_err(dev, "%s - nonzero urb status, %d\n",
1261 __func__, status);
1262 tport->tp_tdev->td_urb_error = 1;
1263 wake_up_interruptible(&tport->tp_write_wait);
1264 }
1265
1266 /* send any buffered data */
1267 ti_send(tport);
1268 }
1269
1270
1271 static void ti_recv(struct device *dev, struct tty_struct *tty,
1272 unsigned char *data, int length)
1273 {
1274 int cnt;
1275
1276 do {
1277 cnt = tty_buffer_request_room(tty, length);
1278 if (cnt < length) {
1279 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1280 __func__, length - cnt);
1281 if (cnt == 0)
1282 break;
1283 }
1284 tty_insert_flip_string(tty, data, cnt);
1285 tty_flip_buffer_push(tty);
1286 data += cnt;
1287 length -= cnt;
1288 } while (length > 0);
1289
1290 }
1291
1292
1293 static void ti_send(struct ti_port *tport)
1294 {
1295 int count, result;
1296 struct usb_serial_port *port = tport->tp_port;
1297 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1298 unsigned long flags;
1299
1300
1301 dbg("%s - port %d", __func__, port->number);
1302
1303 spin_lock_irqsave(&tport->tp_lock, flags);
1304
1305 if (tport->tp_write_urb_in_use)
1306 goto unlock;
1307
1308 count = ti_buf_get(tport->tp_write_buf,
1309 port->write_urb->transfer_buffer,
1310 port->bulk_out_size);
1311
1312 if (count == 0)
1313 goto unlock;
1314
1315 tport->tp_write_urb_in_use = 1;
1316
1317 spin_unlock_irqrestore(&tport->tp_lock, flags);
1318
1319 usb_serial_debug_data(debug, &port->dev, __func__, count,
1320 port->write_urb->transfer_buffer);
1321
1322 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1323 usb_sndbulkpipe(port->serial->dev,
1324 port->bulk_out_endpointAddress),
1325 port->write_urb->transfer_buffer, count,
1326 ti_bulk_out_callback, tport);
1327
1328 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1329 if (result) {
1330 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1331 __func__, result);
1332 tport->tp_write_urb_in_use = 0;
1333 /* TODO: reschedule ti_send */
1334 } else {
1335 spin_lock_irqsave(&tport->tp_lock, flags);
1336 tport->tp_icount.tx += count;
1337 spin_unlock_irqrestore(&tport->tp_lock, flags);
1338 }
1339
1340 /* more room in the buffer for new writes, wakeup */
1341 if (tty)
1342 tty_wakeup(tty);
1343 tty_kref_put(tty);
1344 wake_up_interruptible(&tport->tp_write_wait);
1345 return;
1346 unlock:
1347 spin_unlock_irqrestore(&tport->tp_lock, flags);
1348 tty_kref_put(tty);
1349 return;
1350 }
1351
1352
1353 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1354 {
1355 unsigned long flags;
1356 int status;
1357
1358 status = ti_write_byte(tport->tp_tdev,
1359 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1360 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1361
1362 spin_lock_irqsave(&tport->tp_lock, flags);
1363 if (!status)
1364 tport->tp_shadow_mcr = mcr;
1365 spin_unlock_irqrestore(&tport->tp_lock, flags);
1366
1367 return status;
1368 }
1369
1370
1371 static int ti_get_lsr(struct ti_port *tport)
1372 {
1373 int size, status;
1374 struct ti_device *tdev = tport->tp_tdev;
1375 struct usb_serial_port *port = tport->tp_port;
1376 int port_number = port->number - port->serial->minor;
1377 struct ti_port_status *data;
1378
1379 dbg("%s - port %d", __func__, port->number);
1380
1381 size = sizeof(struct ti_port_status);
1382 data = kmalloc(size, GFP_KERNEL);
1383 if (!data) {
1384 dev_err(&port->dev, "%s - out of memory\n", __func__);
1385 return -ENOMEM;
1386 }
1387
1388 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1389 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1390 if (status) {
1391 dev_err(&port->dev,
1392 "%s - get port status command failed, %d\n",
1393 __func__, status);
1394 goto free_data;
1395 }
1396
1397 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1398
1399 tport->tp_lsr = data->bLSR;
1400
1401 free_data:
1402 kfree(data);
1403 return status;
1404 }
1405
1406
1407 static int ti_get_serial_info(struct ti_port *tport,
1408 struct serial_struct __user *ret_arg)
1409 {
1410 struct usb_serial_port *port = tport->tp_port;
1411 struct serial_struct ret_serial;
1412
1413 if (!ret_arg)
1414 return -EFAULT;
1415
1416 memset(&ret_serial, 0, sizeof(ret_serial));
1417
1418 ret_serial.type = PORT_16550A;
1419 ret_serial.line = port->serial->minor;
1420 ret_serial.port = port->number - port->serial->minor;
1421 ret_serial.flags = tport->tp_flags;
1422 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1423 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1424 ret_serial.closing_wait = tport->tp_closing_wait;
1425
1426 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1427 return -EFAULT;
1428
1429 return 0;
1430 }
1431
1432
1433 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1434 struct serial_struct __user *new_arg)
1435 {
1436 struct serial_struct new_serial;
1437
1438 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1439 return -EFAULT;
1440
1441 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1442 tport->tp_closing_wait = new_serial.closing_wait;
1443
1444 return 0;
1445 }
1446
1447
1448 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1449 {
1450 struct async_icount *icount;
1451 struct tty_struct *tty;
1452 unsigned long flags;
1453
1454 dbg("%s - msr 0x%02X", __func__, msr);
1455
1456 if (msr & TI_MSR_DELTA_MASK) {
1457 spin_lock_irqsave(&tport->tp_lock, flags);
1458 icount = &tport->tp_icount;
1459 if (msr & TI_MSR_DELTA_CTS)
1460 icount->cts++;
1461 if (msr & TI_MSR_DELTA_DSR)
1462 icount->dsr++;
1463 if (msr & TI_MSR_DELTA_CD)
1464 icount->dcd++;
1465 if (msr & TI_MSR_DELTA_RI)
1466 icount->rng++;
1467 wake_up_interruptible(&tport->tp_msr_wait);
1468 spin_unlock_irqrestore(&tport->tp_lock, flags);
1469 }
1470
1471 tport->tp_msr = msr & TI_MSR_MASK;
1472
1473 /* handle CTS flow control */
1474 tty = tty_port_tty_get(&tport->tp_port->port);
1475 if (tty && C_CRTSCTS(tty)) {
1476 if (msr & TI_MSR_CTS) {
1477 tty->hw_stopped = 0;
1478 tty_wakeup(tty);
1479 } else {
1480 tty->hw_stopped = 1;
1481 }
1482 }
1483 tty_kref_put(tty);
1484 }
1485
1486
1487 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1488 {
1489 struct ti_device *tdev = tport->tp_tdev;
1490 struct usb_serial_port *port = tport->tp_port;
1491 wait_queue_t wait;
1492
1493 dbg("%s - port %d", __func__, port->number);
1494
1495 spin_lock_irq(&tport->tp_lock);
1496
1497 /* wait for data to drain from the buffer */
1498 tdev->td_urb_error = 0;
1499 init_waitqueue_entry(&wait, current);
1500 add_wait_queue(&tport->tp_write_wait, &wait);
1501 for (;;) {
1502 set_current_state(TASK_INTERRUPTIBLE);
1503 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1504 || timeout == 0 || signal_pending(current)
1505 || tdev->td_urb_error
1506 || port->serial->disconnected) /* disconnect */
1507 break;
1508 spin_unlock_irq(&tport->tp_lock);
1509 timeout = schedule_timeout(timeout);
1510 spin_lock_irq(&tport->tp_lock);
1511 }
1512 set_current_state(TASK_RUNNING);
1513 remove_wait_queue(&tport->tp_write_wait, &wait);
1514
1515 /* flush any remaining data in the buffer */
1516 if (flush)
1517 ti_buf_clear(tport->tp_write_buf);
1518
1519 spin_unlock_irq(&tport->tp_lock);
1520
1521 mutex_lock(&port->serial->disc_mutex);
1522 /* wait for data to drain from the device */
1523 /* wait for empty tx register, plus 20 ms */
1524 timeout += jiffies;
1525 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1526 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1527 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1528 && !port->serial->disconnected) {
1529 if (ti_get_lsr(tport))
1530 break;
1531 mutex_unlock(&port->serial->disc_mutex);
1532 msleep_interruptible(20);
1533 mutex_lock(&port->serial->disc_mutex);
1534 }
1535 mutex_unlock(&port->serial->disc_mutex);
1536 }
1537
1538
1539 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1540 {
1541 unsigned long flags;
1542
1543 spin_lock_irqsave(&tport->tp_lock, flags);
1544
1545 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1546 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1547
1548 spin_unlock_irqrestore(&tport->tp_lock, flags);
1549 }
1550
1551
1552 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1553 {
1554 struct urb *urb;
1555 int status = 0;
1556 unsigned long flags;
1557
1558 spin_lock_irqsave(&tport->tp_lock, flags);
1559
1560 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1561 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1562 urb = tport->tp_port->read_urb;
1563 spin_unlock_irqrestore(&tport->tp_lock, flags);
1564 urb->complete = ti_bulk_in_callback;
1565 urb->context = tport;
1566 urb->dev = tport->tp_port->serial->dev;
1567 status = usb_submit_urb(urb, GFP_KERNEL);
1568 } else {
1569 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1570 spin_unlock_irqrestore(&tport->tp_lock, flags);
1571 }
1572
1573 return status;
1574 }
1575
1576
1577 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1578 __u16 moduleid, __u16 value, __u8 *data, int size)
1579 {
1580 int status;
1581
1582 status = usb_control_msg(tdev->td_serial->dev,
1583 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1584 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1585 value, moduleid, data, size, 1000);
1586
1587 if (status == size)
1588 status = 0;
1589
1590 if (status > 0)
1591 status = -ECOMM;
1592
1593 return status;
1594 }
1595
1596
1597 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1598 __u16 moduleid, __u16 value, __u8 *data, int size)
1599 {
1600 int status;
1601
1602 status = usb_control_msg(tdev->td_serial->dev,
1603 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1604 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1605 value, moduleid, data, size, 1000);
1606
1607 if (status == size)
1608 status = 0;
1609
1610 if (status > 0)
1611 status = -ECOMM;
1612
1613 return status;
1614 }
1615
1616
1617 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1618 __u8 mask, __u8 byte)
1619 {
1620 int status;
1621 unsigned int size;
1622 struct ti_write_data_bytes *data;
1623 struct device *dev = &tdev->td_serial->dev->dev;
1624
1625 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1626 __func__, addr, mask, byte);
1627
1628 size = sizeof(struct ti_write_data_bytes) + 2;
1629 data = kmalloc(size, GFP_KERNEL);
1630 if (!data) {
1631 dev_err(dev, "%s - out of memory\n", __func__);
1632 return -ENOMEM;
1633 }
1634
1635 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1636 data->bDataType = TI_RW_DATA_BYTE;
1637 data->bDataCounter = 1;
1638 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1639 data->wBaseAddrLo = cpu_to_be16(addr);
1640 data->bData[0] = mask;
1641 data->bData[1] = byte;
1642
1643 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1644 (__u8 *)data, size);
1645
1646 if (status < 0)
1647 dev_err(dev, "%s - failed, %d\n", __func__, status);
1648
1649 kfree(data);
1650
1651 return status;
1652 }
1653
1654 static int ti_do_download(struct usb_device *dev, int pipe,
1655 u8 *buffer, int size)
1656 {
1657 int pos;
1658 u8 cs = 0;
1659 int done;
1660 struct ti_firmware_header *header;
1661 int status;
1662 int len;
1663
1664 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1665 cs = (__u8)(cs + buffer[pos]);
1666
1667 header = (struct ti_firmware_header *)buffer;
1668 header->wLength = cpu_to_le16((__u16)(size
1669 - sizeof(struct ti_firmware_header)));
1670 header->bCheckSum = cs;
1671
1672 dbg("%s - downloading firmware", __func__);
1673 for (pos = 0; pos < size; pos += done) {
1674 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1675 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1676 &done, 1000);
1677 if (status)
1678 break;
1679 }
1680 return status;
1681 }
1682
1683 static int ti_download_firmware(struct ti_device *tdev)
1684 {
1685 int status;
1686 int buffer_size;
1687 __u8 *buffer;
1688 struct usb_device *dev = tdev->td_serial->dev;
1689 unsigned int pipe = usb_sndbulkpipe(dev,
1690 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1691 const struct firmware *fw_p;
1692 char buf[32];
1693
1694 /* try ID specific firmware first, then try generic firmware */
1695 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1696 dev->descriptor.idProduct);
1697 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1698 buf[0] = '\0';
1699 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1700 switch (dev->descriptor.idProduct) {
1701 case MTS_CDMA_PRODUCT_ID:
1702 strcpy(buf, "mts_cdma.fw");
1703 break;
1704 case MTS_GSM_PRODUCT_ID:
1705 strcpy(buf, "mts_gsm.fw");
1706 break;
1707 case MTS_EDGE_PRODUCT_ID:
1708 strcpy(buf, "mts_edge.fw");
1709 break;
1710 }
1711 }
1712 if (buf[0] == '\0') {
1713 if (tdev->td_is_3410)
1714 strcpy(buf, "ti_3410.fw");
1715 else
1716 strcpy(buf, "ti_5052.fw");
1717 }
1718 status = request_firmware(&fw_p, buf, &dev->dev);
1719 }
1720 if (status) {
1721 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1722 return -ENOENT;
1723 }
1724 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1725 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1726 return -ENOENT;
1727 }
1728
1729 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1730 buffer = kmalloc(buffer_size, GFP_KERNEL);
1731 if (buffer) {
1732 memcpy(buffer, fw_p->data, fw_p->size);
1733 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1734 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1735 kfree(buffer);
1736 } else {
1737 status = -ENOMEM;
1738 }
1739 release_firmware(fw_p);
1740 if (status) {
1741 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1742 __func__, status);
1743 return status;
1744 }
1745
1746 dbg("%s - download successful", __func__);
1747
1748 return 0;
1749 }
1750
1751
1752 /* Circular Buffer Functions */
1753
1754 /*
1755 * ti_buf_alloc
1756 *
1757 * Allocate a circular buffer and all associated memory.
1758 */
1759
1760 static struct circ_buf *ti_buf_alloc(void)
1761 {
1762 struct circ_buf *cb;
1763
1764 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1765 if (cb == NULL)
1766 return NULL;
1767
1768 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1769 if (cb->buf == NULL) {
1770 kfree(cb);
1771 return NULL;
1772 }
1773
1774 ti_buf_clear(cb);
1775
1776 return cb;
1777 }
1778
1779
1780 /*
1781 * ti_buf_free
1782 *
1783 * Free the buffer and all associated memory.
1784 */
1785
1786 static void ti_buf_free(struct circ_buf *cb)
1787 {
1788 kfree(cb->buf);
1789 kfree(cb);
1790 }
1791
1792
1793 /*
1794 * ti_buf_clear
1795 *
1796 * Clear out all data in the circular buffer.
1797 */
1798
1799 static void ti_buf_clear(struct circ_buf *cb)
1800 {
1801 cb->head = cb->tail = 0;
1802 }
1803
1804
1805 /*
1806 * ti_buf_data_avail
1807 *
1808 * Return the number of bytes of data available in the circular
1809 * buffer.
1810 */
1811
1812 static int ti_buf_data_avail(struct circ_buf *cb)
1813 {
1814 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1815 }
1816
1817
1818 /*
1819 * ti_buf_space_avail
1820 *
1821 * Return the number of bytes of space available in the circular
1822 * buffer.
1823 */
1824
1825 static int ti_buf_space_avail(struct circ_buf *cb)
1826 {
1827 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1828 }
1829
1830
1831 /*
1832 * ti_buf_put
1833 *
1834 * Copy data data from a user buffer and put it into the circular buffer.
1835 * Restrict to the amount of space available.
1836 *
1837 * Return the number of bytes copied.
1838 */
1839
1840 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1841 {
1842 int c, ret = 0;
1843
1844 while (1) {
1845 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1846 if (count < c)
1847 c = count;
1848 if (c <= 0)
1849 break;
1850 memcpy(cb->buf + cb->head, buf, c);
1851 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1852 buf += c;
1853 count -= c;
1854 ret += c;
1855 }
1856
1857 return ret;
1858 }
1859
1860
1861 /*
1862 * ti_buf_get
1863 *
1864 * Get data from the circular buffer and copy to the given buffer.
1865 * Restrict to the amount of data available.
1866 *
1867 * Return the number of bytes copied.
1868 */
1869
1870 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1871 {
1872 int c, ret = 0;
1873
1874 while (1) {
1875 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1876 if (count < c)
1877 c = count;
1878 if (c <= 0)
1879 break;
1880 memcpy(buf, cb->buf + cb->tail, c);
1881 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1882 buf += c;
1883 count -= c;
1884 ret += c;
1885 }
1886
1887 return ret;
1888 }
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