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Merge commit 'v2.6.27-rc3' into x86/prototypes
[deliverable/linux.git] / drivers / usb / serial / ti_usb_3410_5052.c
1 /* vi: ts=8 sw=8
2 *
3 * TI 3410/5052 USB Serial Driver
4 *
5 * Copyright (C) 2004 Texas Instruments
6 *
7 * This driver is based on the Linux io_ti driver, which is
8 * Copyright (C) 2000-2002 Inside Out Networks
9 * Copyright (C) 2001-2002 Greg Kroah-Hartman
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * For questions or problems with this driver, contact Texas Instruments
17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18 * Peter Berger <pberger@brimson.com>.
19 *
20 * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
21 * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
22 * configuration.
23 *
24 * #!/bin/bash
25 *
26 * BOOT_CONFIG=1
27 * ACTIVE_CONFIG=2
28 *
29 * if [[ "$ACTION" != "add" ]]
30 * then
31 * exit
32 * fi
33 *
34 * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
35 *
36 * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
37 * then
38 * exit
39 * fi
40 *
41 * PRODUCT=${PRODUCT%/?*} # delete version
42 * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
43 * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
44 *
45 * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
46 *
47 * function scan() {
48 * s=$1
49 * shift
50 * for i
51 * do
52 * if [[ $s -eq $i ]]
53 * then
54 * return 0
55 * fi
56 * done
57 * return 1
58 * }
59 *
60 * IFS=$IFS,
61 *
62 * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
63 * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
64 * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
65 * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
66 * then
67 * echo $ACTIVE_CONFIG > $CONFIG_PATH
68 * fi
69 */
70
71 #include <linux/kernel.h>
72 #include <linux/errno.h>
73 #include <linux/firmware.h>
74 #include <linux/init.h>
75 #include <linux/slab.h>
76 #include <linux/tty.h>
77 #include <linux/tty_driver.h>
78 #include <linux/tty_flip.h>
79 #include <linux/module.h>
80 #include <linux/spinlock.h>
81 #include <linux/ioctl.h>
82 #include <linux/serial.h>
83 #include <linux/circ_buf.h>
84 #include <linux/mutex.h>
85 #include <linux/uaccess.h>
86 #include <linux/usb.h>
87 #include <linux/usb/serial.h>
88 #include <linux/firmware.h>
89
90 #include "ti_usb_3410_5052.h"
91
92 /* Defines */
93
94 #define TI_DRIVER_VERSION "v0.9"
95 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
96 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
97
98 #define TI_FIRMWARE_BUF_SIZE 16284
99
100 #define TI_WRITE_BUF_SIZE 1024
101
102 #define TI_TRANSFER_TIMEOUT 2
103
104 #define TI_DEFAULT_LOW_LATENCY 0
105 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
106
107 /* supported setserial flags */
108 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
109
110 /* read urb states */
111 #define TI_READ_URB_RUNNING 0
112 #define TI_READ_URB_STOPPING 1
113 #define TI_READ_URB_STOPPED 2
114
115 #define TI_EXTRA_VID_PID_COUNT 5
116
117
118 /* Structures */
119
120 struct ti_port {
121 int tp_is_open;
122 __u8 tp_msr;
123 __u8 tp_lsr;
124 __u8 tp_shadow_mcr;
125 __u8 tp_uart_mode; /* 232 or 485 modes */
126 unsigned int tp_uart_base_addr;
127 int tp_flags;
128 int tp_closing_wait;/* in .01 secs */
129 struct async_icount tp_icount;
130 wait_queue_head_t tp_msr_wait; /* wait for msr change */
131 wait_queue_head_t tp_write_wait;
132 struct ti_device *tp_tdev;
133 struct usb_serial_port *tp_port;
134 spinlock_t tp_lock;
135 int tp_read_urb_state;
136 int tp_write_urb_in_use;
137 struct circ_buf *tp_write_buf;
138 };
139
140 struct ti_device {
141 struct mutex td_open_close_lock;
142 int td_open_port_count;
143 struct usb_serial *td_serial;
144 int td_is_3410;
145 int td_urb_error;
146 };
147
148
149 /* Function Declarations */
150
151 static int ti_startup(struct usb_serial *serial);
152 static void ti_shutdown(struct usb_serial *serial);
153 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port,
154 struct file *file);
155 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
156 struct file *file);
157 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
158 const unsigned char *data, int count);
159 static int ti_write_room(struct tty_struct *tty);
160 static int ti_chars_in_buffer(struct tty_struct *tty);
161 static void ti_throttle(struct tty_struct *tty);
162 static void ti_unthrottle(struct tty_struct *tty);
163 static int ti_ioctl(struct tty_struct *tty, struct file *file,
164 unsigned int cmd, unsigned long arg);
165 static void ti_set_termios(struct tty_struct *tty,
166 struct usb_serial_port *port, struct ktermios *old_termios);
167 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
168 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
169 unsigned int set, unsigned int clear);
170 static void ti_break(struct tty_struct *tty, int break_state);
171 static void ti_interrupt_callback(struct urb *urb);
172 static void ti_bulk_in_callback(struct urb *urb);
173 static void ti_bulk_out_callback(struct urb *urb);
174
175 static void ti_recv(struct device *dev, struct tty_struct *tty,
176 unsigned char *data, int length);
177 static void ti_send(struct ti_port *tport);
178 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
179 static int ti_get_lsr(struct ti_port *tport);
180 static int ti_get_serial_info(struct ti_port *tport,
181 struct serial_struct __user *ret_arg);
182 static int ti_set_serial_info(struct ti_port *tport,
183 struct serial_struct __user *new_arg);
184 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
185
186 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
187
188 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
189 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
190
191 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
192 __u16 moduleid, __u16 value, __u8 *data, int size);
193 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
194 __u16 moduleid, __u16 value, __u8 *data, int size);
195
196 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
197 __u8 mask, __u8 byte);
198
199 static int ti_download_firmware(struct ti_device *tdev, int type);
200
201 /* circular buffer */
202 static struct circ_buf *ti_buf_alloc(void);
203 static void ti_buf_free(struct circ_buf *cb);
204 static void ti_buf_clear(struct circ_buf *cb);
205 static int ti_buf_data_avail(struct circ_buf *cb);
206 static int ti_buf_space_avail(struct circ_buf *cb);
207 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
208 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
209
210
211 /* Data */
212
213 /* module parameters */
214 static int debug;
215 static int low_latency = TI_DEFAULT_LOW_LATENCY;
216 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
217 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
218 static unsigned int vendor_3410_count;
219 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
220 static unsigned int product_3410_count;
221 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
222 static unsigned int vendor_5052_count;
223 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
224 static unsigned int product_5052_count;
225
226 /* supported devices */
227 /* the array dimension is the number of default entries plus */
228 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
229 /* null entry */
230 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
231 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
232 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
233 };
234
235 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
236 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
237 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
238 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
239 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
240 };
241
242 static struct usb_device_id ti_id_table_combined[] = {
243 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
244 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
245 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
246 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
247 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
248 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
249 { }
250 };
251
252 static struct usb_driver ti_usb_driver = {
253 .name = "ti_usb_3410_5052",
254 .probe = usb_serial_probe,
255 .disconnect = usb_serial_disconnect,
256 .id_table = ti_id_table_combined,
257 .no_dynamic_id = 1,
258 };
259
260 static struct usb_serial_driver ti_1port_device = {
261 .driver = {
262 .owner = THIS_MODULE,
263 .name = "ti_usb_3410_5052_1",
264 },
265 .description = "TI USB 3410 1 port adapter",
266 .usb_driver = &ti_usb_driver,
267 .id_table = ti_id_table_3410,
268 .num_ports = 1,
269 .attach = ti_startup,
270 .shutdown = ti_shutdown,
271 .open = ti_open,
272 .close = ti_close,
273 .write = ti_write,
274 .write_room = ti_write_room,
275 .chars_in_buffer = ti_chars_in_buffer,
276 .throttle = ti_throttle,
277 .unthrottle = ti_unthrottle,
278 .ioctl = ti_ioctl,
279 .set_termios = ti_set_termios,
280 .tiocmget = ti_tiocmget,
281 .tiocmset = ti_tiocmset,
282 .break_ctl = ti_break,
283 .read_int_callback = ti_interrupt_callback,
284 .read_bulk_callback = ti_bulk_in_callback,
285 .write_bulk_callback = ti_bulk_out_callback,
286 };
287
288 static struct usb_serial_driver ti_2port_device = {
289 .driver = {
290 .owner = THIS_MODULE,
291 .name = "ti_usb_3410_5052_2",
292 },
293 .description = "TI USB 5052 2 port adapter",
294 .usb_driver = &ti_usb_driver,
295 .id_table = ti_id_table_5052,
296 .num_ports = 2,
297 .attach = ti_startup,
298 .shutdown = ti_shutdown,
299 .open = ti_open,
300 .close = ti_close,
301 .write = ti_write,
302 .write_room = ti_write_room,
303 .chars_in_buffer = ti_chars_in_buffer,
304 .throttle = ti_throttle,
305 .unthrottle = ti_unthrottle,
306 .ioctl = ti_ioctl,
307 .set_termios = ti_set_termios,
308 .tiocmget = ti_tiocmget,
309 .tiocmset = ti_tiocmset,
310 .break_ctl = ti_break,
311 .read_int_callback = ti_interrupt_callback,
312 .read_bulk_callback = ti_bulk_in_callback,
313 .write_bulk_callback = ti_bulk_out_callback,
314 };
315
316
317 /* Module */
318
319 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
320 MODULE_DESCRIPTION(TI_DRIVER_DESC);
321 MODULE_VERSION(TI_DRIVER_VERSION);
322 MODULE_LICENSE("GPL");
323
324 MODULE_FIRMWARE("ti_3410.fw");
325 MODULE_FIRMWARE("ti_5052.fw");
326
327 module_param(debug, bool, S_IRUGO | S_IWUSR);
328 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
329
330 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
331 MODULE_PARM_DESC(low_latency,
332 "TTY low_latency flag, 0=off, 1=on, default is off");
333
334 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
335 MODULE_PARM_DESC(closing_wait,
336 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
337
338 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
339 MODULE_PARM_DESC(vendor_3410,
340 "Vendor ids for 3410 based devices, 1-5 short integers");
341 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
342 MODULE_PARM_DESC(product_3410,
343 "Product ids for 3410 based devices, 1-5 short integers");
344 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
345 MODULE_PARM_DESC(vendor_5052,
346 "Vendor ids for 5052 based devices, 1-5 short integers");
347 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
348 MODULE_PARM_DESC(product_5052,
349 "Product ids for 5052 based devices, 1-5 short integers");
350
351 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
352
353
354 /* Functions */
355
356 static int __init ti_init(void)
357 {
358 int i, j;
359 int ret;
360
361 /* insert extra vendor and product ids */
362 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
363 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++) {
364 ti_id_table_3410[j].idVendor = vendor_3410[i];
365 ti_id_table_3410[j].idProduct = product_3410[i];
366 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
367 }
368 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
369 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++) {
370 ti_id_table_5052[j].idVendor = vendor_5052[i];
371 ti_id_table_5052[j].idProduct = product_5052[i];
372 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
373 }
374
375 ret = usb_serial_register(&ti_1port_device);
376 if (ret)
377 goto failed_1port;
378 ret = usb_serial_register(&ti_2port_device);
379 if (ret)
380 goto failed_2port;
381
382 ret = usb_register(&ti_usb_driver);
383 if (ret)
384 goto failed_usb;
385
386 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
387
388 return 0;
389
390 failed_usb:
391 usb_serial_deregister(&ti_2port_device);
392 failed_2port:
393 usb_serial_deregister(&ti_1port_device);
394 failed_1port:
395 return ret;
396 }
397
398
399 static void __exit ti_exit(void)
400 {
401 usb_serial_deregister(&ti_1port_device);
402 usb_serial_deregister(&ti_2port_device);
403 usb_deregister(&ti_usb_driver);
404 }
405
406
407 module_init(ti_init);
408 module_exit(ti_exit);
409
410
411 static int ti_startup(struct usb_serial *serial)
412 {
413 struct ti_device *tdev;
414 struct ti_port *tport;
415 struct usb_device *dev = serial->dev;
416 int status;
417 int i;
418
419
420 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
421 __func__, le16_to_cpu(dev->descriptor.idProduct),
422 dev->descriptor.bNumConfigurations,
423 dev->actconfig->desc.bConfigurationValue);
424
425 /* create device structure */
426 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
427 if (tdev == NULL) {
428 dev_err(&dev->dev, "%s - out of memory\n", __func__);
429 return -ENOMEM;
430 }
431 mutex_init(&tdev->td_open_close_lock);
432 tdev->td_serial = serial;
433 usb_set_serial_data(serial, tdev);
434
435 /* determine device type */
436 if (usb_match_id(serial->interface, ti_id_table_3410))
437 tdev->td_is_3410 = 1;
438 dbg("%s - device type is %s", __func__,
439 tdev->td_is_3410 ? "3410" : "5052");
440
441 /* if we have only 1 configuration, download firmware */
442 if (dev->descriptor.bNumConfigurations == 1) {
443 if (tdev->td_is_3410)
444 status = ti_download_firmware(tdev, 3410);
445 else
446 status = ti_download_firmware(tdev, 5052);
447 if (status)
448 goto free_tdev;
449
450 /* 3410 must be reset, 5052 resets itself */
451 if (tdev->td_is_3410) {
452 msleep_interruptible(100);
453 usb_reset_device(dev);
454 }
455
456 status = -ENODEV;
457 goto free_tdev;
458 }
459
460 /* the second configuration must be set (in sysfs by hotplug script) */
461 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
462 status = -ENODEV;
463 goto free_tdev;
464 }
465
466 /* set up port structures */
467 for (i = 0; i < serial->num_ports; ++i) {
468 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
469 if (tport == NULL) {
470 dev_err(&dev->dev, "%s - out of memory\n", __func__);
471 status = -ENOMEM;
472 goto free_tports;
473 }
474 spin_lock_init(&tport->tp_lock);
475 tport->tp_uart_base_addr = (i == 0 ?
476 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
477 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
478 tport->tp_closing_wait = closing_wait;
479 init_waitqueue_head(&tport->tp_msr_wait);
480 init_waitqueue_head(&tport->tp_write_wait);
481 tport->tp_write_buf = ti_buf_alloc();
482 if (tport->tp_write_buf == NULL) {
483 dev_err(&dev->dev, "%s - out of memory\n", __func__);
484 kfree(tport);
485 status = -ENOMEM;
486 goto free_tports;
487 }
488 tport->tp_port = serial->port[i];
489 tport->tp_tdev = tdev;
490 usb_set_serial_port_data(serial->port[i], tport);
491 tport->tp_uart_mode = 0; /* default is RS232 */
492 }
493
494 return 0;
495
496 free_tports:
497 for (--i; i >= 0; --i) {
498 tport = usb_get_serial_port_data(serial->port[i]);
499 ti_buf_free(tport->tp_write_buf);
500 kfree(tport);
501 usb_set_serial_port_data(serial->port[i], NULL);
502 }
503 free_tdev:
504 kfree(tdev);
505 usb_set_serial_data(serial, NULL);
506 return status;
507 }
508
509
510 static void ti_shutdown(struct usb_serial *serial)
511 {
512 int i;
513 struct ti_device *tdev = usb_get_serial_data(serial);
514 struct ti_port *tport;
515
516 dbg("%s", __func__);
517
518 for (i = 0; i < serial->num_ports; ++i) {
519 tport = usb_get_serial_port_data(serial->port[i]);
520 if (tport) {
521 ti_buf_free(tport->tp_write_buf);
522 kfree(tport);
523 usb_set_serial_port_data(serial->port[i], NULL);
524 }
525 }
526
527 kfree(tdev);
528 usb_set_serial_data(serial, NULL);
529 }
530
531
532 static int ti_open(struct tty_struct *tty,
533 struct usb_serial_port *port, struct file *file)
534 {
535 struct ti_port *tport = usb_get_serial_port_data(port);
536 struct ti_device *tdev;
537 struct usb_device *dev;
538 struct urb *urb;
539 int port_number;
540 int status;
541 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
542 TI_PIPE_TIMEOUT_ENABLE |
543 (TI_TRANSFER_TIMEOUT << 2));
544
545 dbg("%s - port %d", __func__, port->number);
546
547 if (tport == NULL)
548 return -ENODEV;
549
550 dev = port->serial->dev;
551 tdev = tport->tp_tdev;
552
553 /* only one open on any port on a device at a time */
554 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
555 return -ERESTARTSYS;
556
557 if (tty)
558 tty->low_latency =
559 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
560
561 port_number = port->number - port->serial->minor;
562
563 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
564
565 tport->tp_msr = 0;
566 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
567
568 /* start interrupt urb the first time a port is opened on this device */
569 if (tdev->td_open_port_count == 0) {
570 dbg("%s - start interrupt in urb", __func__);
571 urb = tdev->td_serial->port[0]->interrupt_in_urb;
572 if (!urb) {
573 dev_err(&port->dev, "%s - no interrupt urb\n",
574 __func__);
575 status = -EINVAL;
576 goto release_lock;
577 }
578 urb->complete = ti_interrupt_callback;
579 urb->context = tdev;
580 urb->dev = dev;
581 status = usb_submit_urb(urb, GFP_KERNEL);
582 if (status) {
583 dev_err(&port->dev,
584 "%s - submit interrupt urb failed, %d\n",
585 __func__, status);
586 goto release_lock;
587 }
588 }
589
590 if (tty)
591 ti_set_termios(tty, port, tty->termios);
592
593 dbg("%s - sending TI_OPEN_PORT", __func__);
594 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
595 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
596 if (status) {
597 dev_err(&port->dev, "%s - cannot send open command, %d\n",
598 __func__, status);
599 goto unlink_int_urb;
600 }
601
602 dbg("%s - sending TI_START_PORT", __func__);
603 status = ti_command_out_sync(tdev, TI_START_PORT,
604 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
605 if (status) {
606 dev_err(&port->dev, "%s - cannot send start command, %d\n",
607 __func__, status);
608 goto unlink_int_urb;
609 }
610
611 dbg("%s - sending TI_PURGE_PORT", __func__);
612 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
613 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
614 if (status) {
615 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
616 __func__, status);
617 goto unlink_int_urb;
618 }
619 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
620 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
621 if (status) {
622 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
623 __func__, status);
624 goto unlink_int_urb;
625 }
626
627 /* reset the data toggle on the bulk endpoints to work around bug in
628 * host controllers where things get out of sync some times */
629 usb_clear_halt(dev, port->write_urb->pipe);
630 usb_clear_halt(dev, port->read_urb->pipe);
631
632 if (tty)
633 ti_set_termios(tty, port, tty->termios);
634
635 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
636 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
637 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
638 if (status) {
639 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
640 __func__, status);
641 goto unlink_int_urb;
642 }
643
644 dbg("%s - sending TI_START_PORT (2)", __func__);
645 status = ti_command_out_sync(tdev, TI_START_PORT,
646 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
647 if (status) {
648 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
649 __func__, status);
650 goto unlink_int_urb;
651 }
652
653 /* start read urb */
654 dbg("%s - start read urb", __func__);
655 urb = port->read_urb;
656 if (!urb) {
657 dev_err(&port->dev, "%s - no read urb\n", __func__);
658 status = -EINVAL;
659 goto unlink_int_urb;
660 }
661 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
662 urb->complete = ti_bulk_in_callback;
663 urb->context = tport;
664 urb->dev = dev;
665 status = usb_submit_urb(urb, GFP_KERNEL);
666 if (status) {
667 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
668 __func__, status);
669 goto unlink_int_urb;
670 }
671
672 tport->tp_is_open = 1;
673 ++tdev->td_open_port_count;
674
675 goto release_lock;
676
677 unlink_int_urb:
678 if (tdev->td_open_port_count == 0)
679 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
680 release_lock:
681 mutex_unlock(&tdev->td_open_close_lock);
682 dbg("%s - exit %d", __func__, status);
683 return status;
684 }
685
686
687 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
688 struct file *file)
689 {
690 struct ti_device *tdev;
691 struct ti_port *tport;
692 int port_number;
693 int status;
694 int do_unlock;
695
696 dbg("%s - port %d", __func__, port->number);
697
698 tdev = usb_get_serial_data(port->serial);
699 tport = usb_get_serial_port_data(port);
700 if (tdev == NULL || tport == NULL)
701 return;
702
703 tport->tp_is_open = 0;
704
705 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
706
707 usb_kill_urb(port->read_urb);
708 usb_kill_urb(port->write_urb);
709 tport->tp_write_urb_in_use = 0;
710
711 port_number = port->number - port->serial->minor;
712
713 dbg("%s - sending TI_CLOSE_PORT", __func__);
714 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
715 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
716 if (status)
717 dev_err(&port->dev,
718 "%s - cannot send close port command, %d\n"
719 , __func__, status);
720
721 /* if mutex_lock is interrupted, continue anyway */
722 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
723 --tport->tp_tdev->td_open_port_count;
724 if (tport->tp_tdev->td_open_port_count <= 0) {
725 /* last port is closed, shut down interrupt urb */
726 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
727 tport->tp_tdev->td_open_port_count = 0;
728 }
729 if (do_unlock)
730 mutex_unlock(&tdev->td_open_close_lock);
731
732 dbg("%s - exit", __func__);
733 }
734
735
736 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
737 const unsigned char *data, int count)
738 {
739 struct ti_port *tport = usb_get_serial_port_data(port);
740 unsigned long flags;
741
742 dbg("%s - port %d", __func__, port->number);
743
744 if (count == 0) {
745 dbg("%s - write request of 0 bytes", __func__);
746 return 0;
747 }
748
749 if (tport == NULL || !tport->tp_is_open)
750 return -ENODEV;
751
752 spin_lock_irqsave(&tport->tp_lock, flags);
753 count = ti_buf_put(tport->tp_write_buf, data, count);
754 spin_unlock_irqrestore(&tport->tp_lock, flags);
755
756 ti_send(tport);
757
758 return count;
759 }
760
761
762 static int ti_write_room(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 int room = 0;
767 unsigned long flags;
768
769 dbg("%s - port %d", __func__, port->number);
770
771 if (tport == NULL)
772 return -ENODEV;
773
774 spin_lock_irqsave(&tport->tp_lock, flags);
775 room = ti_buf_space_avail(tport->tp_write_buf);
776 spin_unlock_irqrestore(&tport->tp_lock, flags);
777
778 dbg("%s - returns %d", __func__, room);
779 return room;
780 }
781
782
783 static int ti_chars_in_buffer(struct tty_struct *tty)
784 {
785 struct usb_serial_port *port = tty->driver_data;
786 struct ti_port *tport = usb_get_serial_port_data(port);
787 int chars = 0;
788 unsigned long flags;
789
790 dbg("%s - port %d", __func__, port->number);
791
792 if (tport == NULL)
793 return -ENODEV;
794
795 spin_lock_irqsave(&tport->tp_lock, flags);
796 chars = ti_buf_data_avail(tport->tp_write_buf);
797 spin_unlock_irqrestore(&tport->tp_lock, flags);
798
799 dbg("%s - returns %d", __func__, chars);
800 return chars;
801 }
802
803
804 static void ti_throttle(struct tty_struct *tty)
805 {
806 struct usb_serial_port *port = tty->driver_data;
807 struct ti_port *tport = usb_get_serial_port_data(port);
808
809 dbg("%s - port %d", __func__, port->number);
810
811 if (tport == NULL)
812 return;
813
814 if (I_IXOFF(tty) || C_CRTSCTS(tty))
815 ti_stop_read(tport, tty);
816
817 }
818
819
820 static void ti_unthrottle(struct tty_struct *tty)
821 {
822 struct usb_serial_port *port = tty->driver_data;
823 struct ti_port *tport = usb_get_serial_port_data(port);
824 int status;
825
826 dbg("%s - port %d", __func__, port->number);
827
828 if (tport == NULL)
829 return;
830
831 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
832 status = ti_restart_read(tport, tty);
833 if (status)
834 dev_err(&port->dev, "%s - cannot restart read, %d\n",
835 __func__, status);
836 }
837 }
838
839
840 static int ti_ioctl(struct tty_struct *tty, struct file *file,
841 unsigned int cmd, unsigned long arg)
842 {
843 struct usb_serial_port *port = tty->driver_data;
844 struct ti_port *tport = usb_get_serial_port_data(port);
845 struct async_icount cnow;
846 struct async_icount cprev;
847
848 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
849
850 if (tport == NULL)
851 return -ENODEV;
852
853 switch (cmd) {
854 case TIOCGSERIAL:
855 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
856 return ti_get_serial_info(tport,
857 (struct serial_struct __user *)arg);
858 case TIOCSSERIAL:
859 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
860 return ti_set_serial_info(tport,
861 (struct serial_struct __user *)arg);
862 case TIOCMIWAIT:
863 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
864 cprev = tport->tp_icount;
865 while (1) {
866 interruptible_sleep_on(&tport->tp_msr_wait);
867 if (signal_pending(current))
868 return -ERESTARTSYS;
869 cnow = tport->tp_icount;
870 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
871 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
872 return -EIO; /* no change => error */
873 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
874 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
875 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
876 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
877 return 0;
878 cprev = cnow;
879 }
880 break;
881 case TIOCGICOUNT:
882 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
883 __func__, port->number,
884 tport->tp_icount.rx, tport->tp_icount.tx);
885 if (copy_to_user((void __user *)arg, &tport->tp_icount,
886 sizeof(tport->tp_icount)))
887 return -EFAULT;
888 return 0;
889 }
890 return -ENOIOCTLCMD;
891 }
892
893
894 static void ti_set_termios(struct tty_struct *tty,
895 struct usb_serial_port *port, struct ktermios *old_termios)
896 {
897 struct ti_port *tport = usb_get_serial_port_data(port);
898 struct ti_uart_config *config;
899 tcflag_t cflag, iflag;
900 int baud;
901 int status;
902 int port_number = port->number - port->serial->minor;
903 unsigned int mcr;
904
905 dbg("%s - port %d", __func__, port->number);
906
907 cflag = tty->termios->c_cflag;
908 iflag = tty->termios->c_iflag;
909
910 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
911 dbg("%s - old clfag %08x, old iflag %08x", __func__,
912 old_termios->c_cflag, old_termios->c_iflag);
913
914 if (tport == NULL)
915 return;
916
917 config = kmalloc(sizeof(*config), GFP_KERNEL);
918 if (!config) {
919 dev_err(&port->dev, "%s - out of memory\n", __func__);
920 return;
921 }
922
923 config->wFlags = 0;
924
925 /* these flags must be set */
926 config->wFlags |= TI_UART_ENABLE_MS_INTS;
927 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
928 config->bUartMode = (__u8)(tport->tp_uart_mode);
929
930 switch (cflag & CSIZE) {
931 case CS5:
932 config->bDataBits = TI_UART_5_DATA_BITS;
933 break;
934 case CS6:
935 config->bDataBits = TI_UART_6_DATA_BITS;
936 break;
937 case CS7:
938 config->bDataBits = TI_UART_7_DATA_BITS;
939 break;
940 default:
941 case CS8:
942 config->bDataBits = TI_UART_8_DATA_BITS;
943 break;
944 }
945
946 /* CMSPAR isn't supported by this driver */
947 tty->termios->c_cflag &= ~CMSPAR;
948
949 if (cflag & PARENB) {
950 if (cflag & PARODD) {
951 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
952 config->bParity = TI_UART_ODD_PARITY;
953 } else {
954 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
955 config->bParity = TI_UART_EVEN_PARITY;
956 }
957 } else {
958 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
959 config->bParity = TI_UART_NO_PARITY;
960 }
961
962 if (cflag & CSTOPB)
963 config->bStopBits = TI_UART_2_STOP_BITS;
964 else
965 config->bStopBits = TI_UART_1_STOP_BITS;
966
967 if (cflag & CRTSCTS) {
968 /* RTS flow control must be off to drop RTS for baud rate B0 */
969 if ((cflag & CBAUD) != B0)
970 config->wFlags |= TI_UART_ENABLE_RTS_IN;
971 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
972 } else {
973 tty->hw_stopped = 0;
974 ti_restart_read(tport, tty);
975 }
976
977 if (I_IXOFF(tty) || I_IXON(tty)) {
978 config->cXon = START_CHAR(tty);
979 config->cXoff = STOP_CHAR(tty);
980
981 if (I_IXOFF(tty))
982 config->wFlags |= TI_UART_ENABLE_X_IN;
983 else
984 ti_restart_read(tport, tty);
985
986 if (I_IXON(tty))
987 config->wFlags |= TI_UART_ENABLE_X_OUT;
988 }
989
990 baud = tty_get_baud_rate(tty);
991 if (!baud)
992 baud = 9600;
993 if (tport->tp_tdev->td_is_3410)
994 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
995 else
996 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
997
998 /* FIXME: Should calculate resulting baud here and report it back */
999 if ((cflag & CBAUD) != B0)
1000 tty_encode_baud_rate(tty, baud, baud);
1001
1002 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
1003 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
1004
1005 cpu_to_be16s(&config->wBaudRate);
1006 cpu_to_be16s(&config->wFlags);
1007
1008 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1009 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1010 sizeof(*config));
1011 if (status)
1012 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
1013 __func__, port_number, status);
1014
1015 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1016 mcr = tport->tp_shadow_mcr;
1017 /* if baud rate is B0, clear RTS and DTR */
1018 if ((cflag & CBAUD) == B0)
1019 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1020 status = ti_set_mcr(tport, mcr);
1021 if (status)
1022 dev_err(&port->dev,
1023 "%s - cannot set modem control on port %d, %d\n",
1024 __func__, port_number, status);
1025
1026 kfree(config);
1027 }
1028
1029
1030 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
1031 {
1032 struct usb_serial_port *port = tty->driver_data;
1033 struct ti_port *tport = usb_get_serial_port_data(port);
1034 unsigned int result;
1035 unsigned int msr;
1036 unsigned int mcr;
1037 unsigned long flags;
1038
1039 dbg("%s - port %d", __func__, port->number);
1040
1041 if (tport == NULL)
1042 return -ENODEV;
1043
1044 spin_lock_irqsave(&tport->tp_lock, flags);
1045 msr = tport->tp_msr;
1046 mcr = tport->tp_shadow_mcr;
1047 spin_unlock_irqrestore(&tport->tp_lock, flags);
1048
1049 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1050 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1051 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1052 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1053 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1054 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1055 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1056
1057 dbg("%s - 0x%04X", __func__, result);
1058
1059 return result;
1060 }
1061
1062
1063 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1064 unsigned int set, unsigned int clear)
1065 {
1066 struct usb_serial_port *port = tty->driver_data;
1067 struct ti_port *tport = usb_get_serial_port_data(port);
1068 unsigned int mcr;
1069 unsigned long flags;
1070
1071 dbg("%s - port %d", __func__, port->number);
1072
1073 if (tport == NULL)
1074 return -ENODEV;
1075
1076 spin_lock_irqsave(&tport->tp_lock, flags);
1077 mcr = tport->tp_shadow_mcr;
1078
1079 if (set & TIOCM_RTS)
1080 mcr |= TI_MCR_RTS;
1081 if (set & TIOCM_DTR)
1082 mcr |= TI_MCR_DTR;
1083 if (set & TIOCM_LOOP)
1084 mcr |= TI_MCR_LOOP;
1085
1086 if (clear & TIOCM_RTS)
1087 mcr &= ~TI_MCR_RTS;
1088 if (clear & TIOCM_DTR)
1089 mcr &= ~TI_MCR_DTR;
1090 if (clear & TIOCM_LOOP)
1091 mcr &= ~TI_MCR_LOOP;
1092 spin_unlock_irqrestore(&tport->tp_lock, flags);
1093
1094 return ti_set_mcr(tport, mcr);
1095 }
1096
1097
1098 static void ti_break(struct tty_struct *tty, int break_state)
1099 {
1100 struct usb_serial_port *port = tty->driver_data;
1101 struct ti_port *tport = usb_get_serial_port_data(port);
1102 int status;
1103
1104 dbg("%s - state = %d", __func__, break_state);
1105
1106 if (tport == NULL)
1107 return;
1108
1109 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1110
1111 status = ti_write_byte(tport->tp_tdev,
1112 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1113 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1114
1115 if (status)
1116 dbg("%s - error setting break, %d", __func__, status);
1117 }
1118
1119
1120 static void ti_interrupt_callback(struct urb *urb)
1121 {
1122 struct ti_device *tdev = urb->context;
1123 struct usb_serial_port *port;
1124 struct usb_serial *serial = tdev->td_serial;
1125 struct ti_port *tport;
1126 struct device *dev = &urb->dev->dev;
1127 unsigned char *data = urb->transfer_buffer;
1128 int length = urb->actual_length;
1129 int port_number;
1130 int function;
1131 int status = urb->status;
1132 int retval;
1133 __u8 msr;
1134
1135 dbg("%s", __func__);
1136
1137 switch (status) {
1138 case 0:
1139 break;
1140 case -ECONNRESET:
1141 case -ENOENT:
1142 case -ESHUTDOWN:
1143 dbg("%s - urb shutting down, %d", __func__, status);
1144 tdev->td_urb_error = 1;
1145 return;
1146 default:
1147 dev_err(dev, "%s - nonzero urb status, %d\n",
1148 __func__, status);
1149 tdev->td_urb_error = 1;
1150 goto exit;
1151 }
1152
1153 if (length != 2) {
1154 dbg("%s - bad packet size, %d", __func__, length);
1155 goto exit;
1156 }
1157
1158 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1159 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1160 goto exit;
1161 }
1162
1163 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1164 function = TI_GET_FUNC_FROM_CODE(data[0]);
1165
1166 dbg("%s - port_number %d, function %d, data 0x%02X",
1167 __func__, port_number, function, data[1]);
1168
1169 if (port_number >= serial->num_ports) {
1170 dev_err(dev, "%s - bad port number, %d\n",
1171 __func__, port_number);
1172 goto exit;
1173 }
1174
1175 port = serial->port[port_number];
1176
1177 tport = usb_get_serial_port_data(port);
1178 if (!tport)
1179 goto exit;
1180
1181 switch (function) {
1182 case TI_CODE_DATA_ERROR:
1183 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1184 __func__, port_number, data[1]);
1185 break;
1186
1187 case TI_CODE_MODEM_STATUS:
1188 msr = data[1];
1189 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1190 ti_handle_new_msr(tport, msr);
1191 break;
1192
1193 default:
1194 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1195 __func__, data[1]);
1196 break;
1197 }
1198
1199 exit:
1200 retval = usb_submit_urb(urb, GFP_ATOMIC);
1201 if (retval)
1202 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1203 __func__, retval);
1204 }
1205
1206
1207 static void ti_bulk_in_callback(struct urb *urb)
1208 {
1209 struct ti_port *tport = urb->context;
1210 struct usb_serial_port *port = tport->tp_port;
1211 struct device *dev = &urb->dev->dev;
1212 int status = urb->status;
1213 int retval = 0;
1214
1215 dbg("%s", __func__);
1216
1217 switch (status) {
1218 case 0:
1219 break;
1220 case -ECONNRESET:
1221 case -ENOENT:
1222 case -ESHUTDOWN:
1223 dbg("%s - urb shutting down, %d", __func__, status);
1224 tport->tp_tdev->td_urb_error = 1;
1225 wake_up_interruptible(&tport->tp_write_wait);
1226 return;
1227 default:
1228 dev_err(dev, "%s - nonzero urb status, %d\n",
1229 __func__, status);
1230 tport->tp_tdev->td_urb_error = 1;
1231 wake_up_interruptible(&tport->tp_write_wait);
1232 }
1233
1234 if (status == -EPIPE)
1235 goto exit;
1236
1237 if (status) {
1238 dev_err(dev, "%s - stopping read!\n", __func__);
1239 return;
1240 }
1241
1242 if (port->port.tty && urb->actual_length) {
1243 usb_serial_debug_data(debug, dev, __func__,
1244 urb->actual_length, urb->transfer_buffer);
1245
1246 if (!tport->tp_is_open)
1247 dbg("%s - port closed, dropping data", __func__);
1248 else
1249 ti_recv(&urb->dev->dev, port->port.tty,
1250 urb->transfer_buffer,
1251 urb->actual_length);
1252
1253 spin_lock(&tport->tp_lock);
1254 tport->tp_icount.rx += urb->actual_length;
1255 spin_unlock(&tport->tp_lock);
1256 }
1257
1258 exit:
1259 /* continue to read unless stopping */
1260 spin_lock(&tport->tp_lock);
1261 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1262 urb->dev = port->serial->dev;
1263 retval = usb_submit_urb(urb, GFP_ATOMIC);
1264 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1265 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1266 }
1267 spin_unlock(&tport->tp_lock);
1268 if (retval)
1269 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1270 __func__, retval);
1271 }
1272
1273
1274 static void ti_bulk_out_callback(struct urb *urb)
1275 {
1276 struct ti_port *tport = urb->context;
1277 struct usb_serial_port *port = tport->tp_port;
1278 struct device *dev = &urb->dev->dev;
1279 int status = urb->status;
1280
1281 dbg("%s - port %d", __func__, port->number);
1282
1283 tport->tp_write_urb_in_use = 0;
1284
1285 switch (status) {
1286 case 0:
1287 break;
1288 case -ECONNRESET:
1289 case -ENOENT:
1290 case -ESHUTDOWN:
1291 dbg("%s - urb shutting down, %d", __func__, status);
1292 tport->tp_tdev->td_urb_error = 1;
1293 wake_up_interruptible(&tport->tp_write_wait);
1294 return;
1295 default:
1296 dev_err(dev, "%s - nonzero urb status, %d\n",
1297 __func__, status);
1298 tport->tp_tdev->td_urb_error = 1;
1299 wake_up_interruptible(&tport->tp_write_wait);
1300 }
1301
1302 /* send any buffered data */
1303 ti_send(tport);
1304 }
1305
1306
1307 static void ti_recv(struct device *dev, struct tty_struct *tty,
1308 unsigned char *data, int length)
1309 {
1310 int cnt;
1311
1312 do {
1313 cnt = tty_buffer_request_room(tty, length);
1314 if (cnt < length) {
1315 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1316 __func__, length - cnt);
1317 if (cnt == 0)
1318 break;
1319 }
1320 tty_insert_flip_string(tty, data, cnt);
1321 tty_flip_buffer_push(tty);
1322 data += cnt;
1323 length -= cnt;
1324 } while (length > 0);
1325
1326 }
1327
1328
1329 static void ti_send(struct ti_port *tport)
1330 {
1331 int count, result;
1332 struct usb_serial_port *port = tport->tp_port;
1333 struct tty_struct *tty = port->port.tty; /* FIXME */
1334 unsigned long flags;
1335
1336
1337 dbg("%s - port %d", __func__, port->number);
1338
1339 spin_lock_irqsave(&tport->tp_lock, flags);
1340
1341 if (tport->tp_write_urb_in_use) {
1342 spin_unlock_irqrestore(&tport->tp_lock, flags);
1343 return;
1344 }
1345
1346 count = ti_buf_get(tport->tp_write_buf,
1347 port->write_urb->transfer_buffer,
1348 port->bulk_out_size);
1349
1350 if (count == 0) {
1351 spin_unlock_irqrestore(&tport->tp_lock, flags);
1352 return;
1353 }
1354
1355 tport->tp_write_urb_in_use = 1;
1356
1357 spin_unlock_irqrestore(&tport->tp_lock, flags);
1358
1359 usb_serial_debug_data(debug, &port->dev, __func__, count,
1360 port->write_urb->transfer_buffer);
1361
1362 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1363 usb_sndbulkpipe(port->serial->dev,
1364 port->bulk_out_endpointAddress),
1365 port->write_urb->transfer_buffer, count,
1366 ti_bulk_out_callback, tport);
1367
1368 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1369 if (result) {
1370 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1371 __func__, result);
1372 tport->tp_write_urb_in_use = 0;
1373 /* TODO: reschedule ti_send */
1374 } else {
1375 spin_lock_irqsave(&tport->tp_lock, flags);
1376 tport->tp_icount.tx += count;
1377 spin_unlock_irqrestore(&tport->tp_lock, flags);
1378 }
1379
1380 /* more room in the buffer for new writes, wakeup */
1381 if (tty)
1382 tty_wakeup(tty);
1383 wake_up_interruptible(&tport->tp_write_wait);
1384 }
1385
1386
1387 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1388 {
1389 unsigned long flags;
1390 int status;
1391
1392 status = ti_write_byte(tport->tp_tdev,
1393 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1394 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1395
1396 spin_lock_irqsave(&tport->tp_lock, flags);
1397 if (!status)
1398 tport->tp_shadow_mcr = mcr;
1399 spin_unlock_irqrestore(&tport->tp_lock, flags);
1400
1401 return status;
1402 }
1403
1404
1405 static int ti_get_lsr(struct ti_port *tport)
1406 {
1407 int size, status;
1408 struct ti_device *tdev = tport->tp_tdev;
1409 struct usb_serial_port *port = tport->tp_port;
1410 int port_number = port->number - port->serial->minor;
1411 struct ti_port_status *data;
1412
1413 dbg("%s - port %d", __func__, port->number);
1414
1415 size = sizeof(struct ti_port_status);
1416 data = kmalloc(size, GFP_KERNEL);
1417 if (!data) {
1418 dev_err(&port->dev, "%s - out of memory\n", __func__);
1419 return -ENOMEM;
1420 }
1421
1422 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1423 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1424 if (status) {
1425 dev_err(&port->dev,
1426 "%s - get port status command failed, %d\n",
1427 __func__, status);
1428 goto free_data;
1429 }
1430
1431 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1432
1433 tport->tp_lsr = data->bLSR;
1434
1435 free_data:
1436 kfree(data);
1437 return status;
1438 }
1439
1440
1441 static int ti_get_serial_info(struct ti_port *tport,
1442 struct serial_struct __user *ret_arg)
1443 {
1444 struct usb_serial_port *port = tport->tp_port;
1445 struct serial_struct ret_serial;
1446
1447 if (!ret_arg)
1448 return -EFAULT;
1449
1450 memset(&ret_serial, 0, sizeof(ret_serial));
1451
1452 ret_serial.type = PORT_16550A;
1453 ret_serial.line = port->serial->minor;
1454 ret_serial.port = port->number - port->serial->minor;
1455 ret_serial.flags = tport->tp_flags;
1456 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1457 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1458 ret_serial.closing_wait = tport->tp_closing_wait;
1459
1460 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1461 return -EFAULT;
1462
1463 return 0;
1464 }
1465
1466
1467 static int ti_set_serial_info(struct ti_port *tport,
1468 struct serial_struct __user *new_arg)
1469 {
1470 struct usb_serial_port *port = tport->tp_port;
1471 struct serial_struct new_serial;
1472
1473 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1474 return -EFAULT;
1475
1476 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1477 /* FIXME */
1478 if (port->port.tty)
1479 port->port.tty->low_latency =
1480 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1481 tport->tp_closing_wait = new_serial.closing_wait;
1482
1483 return 0;
1484 }
1485
1486
1487 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1488 {
1489 struct async_icount *icount;
1490 struct tty_struct *tty;
1491 unsigned long flags;
1492
1493 dbg("%s - msr 0x%02X", __func__, msr);
1494
1495 if (msr & TI_MSR_DELTA_MASK) {
1496 spin_lock_irqsave(&tport->tp_lock, flags);
1497 icount = &tport->tp_icount;
1498 if (msr & TI_MSR_DELTA_CTS)
1499 icount->cts++;
1500 if (msr & TI_MSR_DELTA_DSR)
1501 icount->dsr++;
1502 if (msr & TI_MSR_DELTA_CD)
1503 icount->dcd++;
1504 if (msr & TI_MSR_DELTA_RI)
1505 icount->rng++;
1506 wake_up_interruptible(&tport->tp_msr_wait);
1507 spin_unlock_irqrestore(&tport->tp_lock, flags);
1508 }
1509
1510 tport->tp_msr = msr & TI_MSR_MASK;
1511
1512 /* handle CTS flow control */
1513 tty = tport->tp_port->port.tty;
1514 if (tty && C_CRTSCTS(tty)) {
1515 if (msr & TI_MSR_CTS) {
1516 tty->hw_stopped = 0;
1517 tty_wakeup(tty);
1518 } else {
1519 tty->hw_stopped = 1;
1520 }
1521 }
1522 }
1523
1524
1525 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1526 {
1527 struct ti_device *tdev = tport->tp_tdev;
1528 struct usb_serial_port *port = tport->tp_port;
1529 wait_queue_t wait;
1530
1531 dbg("%s - port %d", __func__, port->number);
1532
1533 spin_lock_irq(&tport->tp_lock);
1534
1535 /* wait for data to drain from the buffer */
1536 tdev->td_urb_error = 0;
1537 init_waitqueue_entry(&wait, current);
1538 add_wait_queue(&tport->tp_write_wait, &wait);
1539 for (;;) {
1540 set_current_state(TASK_INTERRUPTIBLE);
1541 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1542 || timeout == 0 || signal_pending(current)
1543 || tdev->td_urb_error
1544 || port->serial->disconnected) /* disconnect */
1545 break;
1546 spin_unlock_irq(&tport->tp_lock);
1547 timeout = schedule_timeout(timeout);
1548 spin_lock_irq(&tport->tp_lock);
1549 }
1550 set_current_state(TASK_RUNNING);
1551 remove_wait_queue(&tport->tp_write_wait, &wait);
1552
1553 /* flush any remaining data in the buffer */
1554 if (flush)
1555 ti_buf_clear(tport->tp_write_buf);
1556
1557 spin_unlock_irq(&tport->tp_lock);
1558
1559 mutex_lock(&port->serial->disc_mutex);
1560 /* wait for data to drain from the device */
1561 /* wait for empty tx register, plus 20 ms */
1562 timeout += jiffies;
1563 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1564 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1565 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1566 && !port->serial->disconnected) {
1567 if (ti_get_lsr(tport))
1568 break;
1569 mutex_unlock(&port->serial->disc_mutex);
1570 msleep_interruptible(20);
1571 mutex_lock(&port->serial->disc_mutex);
1572 }
1573 mutex_unlock(&port->serial->disc_mutex);
1574 }
1575
1576
1577 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1578 {
1579 unsigned long flags;
1580
1581 spin_lock_irqsave(&tport->tp_lock, flags);
1582
1583 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1584 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1585
1586 spin_unlock_irqrestore(&tport->tp_lock, flags);
1587 }
1588
1589
1590 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1591 {
1592 struct urb *urb;
1593 int status = 0;
1594 unsigned long flags;
1595
1596 spin_lock_irqsave(&tport->tp_lock, flags);
1597
1598 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1599 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1600 urb = tport->tp_port->read_urb;
1601 spin_unlock_irqrestore(&tport->tp_lock, flags);
1602 urb->complete = ti_bulk_in_callback;
1603 urb->context = tport;
1604 urb->dev = tport->tp_port->serial->dev;
1605 status = usb_submit_urb(urb, GFP_KERNEL);
1606 } else {
1607 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1608 spin_unlock_irqrestore(&tport->tp_lock, flags);
1609 }
1610
1611 return status;
1612 }
1613
1614
1615 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1616 __u16 moduleid, __u16 value, __u8 *data, int size)
1617 {
1618 int status;
1619
1620 status = usb_control_msg(tdev->td_serial->dev,
1621 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1622 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1623 value, moduleid, data, size, 1000);
1624
1625 if (status == size)
1626 status = 0;
1627
1628 if (status > 0)
1629 status = -ECOMM;
1630
1631 return status;
1632 }
1633
1634
1635 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1636 __u16 moduleid, __u16 value, __u8 *data, int size)
1637 {
1638 int status;
1639
1640 status = usb_control_msg(tdev->td_serial->dev,
1641 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1642 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1643 value, moduleid, data, size, 1000);
1644
1645 if (status == size)
1646 status = 0;
1647
1648 if (status > 0)
1649 status = -ECOMM;
1650
1651 return status;
1652 }
1653
1654
1655 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1656 __u8 mask, __u8 byte)
1657 {
1658 int status;
1659 unsigned int size;
1660 struct ti_write_data_bytes *data;
1661 struct device *dev = &tdev->td_serial->dev->dev;
1662
1663 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1664 __func__, addr, mask, byte);
1665
1666 size = sizeof(struct ti_write_data_bytes) + 2;
1667 data = kmalloc(size, GFP_KERNEL);
1668 if (!data) {
1669 dev_err(dev, "%s - out of memory\n", __func__);
1670 return -ENOMEM;
1671 }
1672
1673 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1674 data->bDataType = TI_RW_DATA_BYTE;
1675 data->bDataCounter = 1;
1676 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1677 data->wBaseAddrLo = cpu_to_be16(addr);
1678 data->bData[0] = mask;
1679 data->bData[1] = byte;
1680
1681 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1682 (__u8 *)data, size);
1683
1684 if (status < 0)
1685 dev_err(dev, "%s - failed, %d\n", __func__, status);
1686
1687 kfree(data);
1688
1689 return status;
1690 }
1691
1692 static int ti_do_download(struct usb_device *dev, int pipe,
1693 u8 *buffer, int size)
1694 {
1695 int pos;
1696 u8 cs = 0;
1697 int done;
1698 struct ti_firmware_header *header;
1699 int status;
1700 int len;
1701
1702 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1703 cs = (__u8)(cs + buffer[pos]);
1704
1705 header = (struct ti_firmware_header *)buffer;
1706 header->wLength = cpu_to_le16((__u16)(size
1707 - sizeof(struct ti_firmware_header)));
1708 header->bCheckSum = cs;
1709
1710 dbg("%s - downloading firmware", __func__);
1711 for (pos = 0; pos < size; pos += done) {
1712 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1713 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1714 &done, 1000);
1715 if (status)
1716 break;
1717 }
1718 return status;
1719 }
1720
1721 static int ti_download_firmware(struct ti_device *tdev, int type)
1722 {
1723 int status = -ENOMEM;
1724 int buffer_size;
1725 __u8 *buffer;
1726 struct usb_device *dev = tdev->td_serial->dev;
1727 unsigned int pipe = usb_sndbulkpipe(dev,
1728 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1729 const struct firmware *fw_p;
1730 char buf[32];
1731 sprintf(buf, "ti_usb-%d.bin", type);
1732
1733 if (request_firmware(&fw_p, buf, &dev->dev)) {
1734 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1735 return -ENOENT;
1736 }
1737 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1738 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1739 return -ENOENT;
1740 }
1741
1742 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1743 buffer = kmalloc(buffer_size, GFP_KERNEL);
1744 if (buffer) {
1745 memcpy(buffer, fw_p->data, fw_p->size);
1746 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1747 ti_do_download(dev, pipe, buffer, fw_p->size);
1748 kfree(buffer);
1749 }
1750 release_firmware(fw_p);
1751 if (status) {
1752 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1753 __func__, status);
1754 return status;
1755 }
1756
1757 dbg("%s - download successful", __func__);
1758
1759 return 0;
1760 }
1761
1762
1763 /* Circular Buffer Functions */
1764
1765 /*
1766 * ti_buf_alloc
1767 *
1768 * Allocate a circular buffer and all associated memory.
1769 */
1770
1771 static struct circ_buf *ti_buf_alloc(void)
1772 {
1773 struct circ_buf *cb;
1774
1775 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1776 if (cb == NULL)
1777 return NULL;
1778
1779 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1780 if (cb->buf == NULL) {
1781 kfree(cb);
1782 return NULL;
1783 }
1784
1785 ti_buf_clear(cb);
1786
1787 return cb;
1788 }
1789
1790
1791 /*
1792 * ti_buf_free
1793 *
1794 * Free the buffer and all associated memory.
1795 */
1796
1797 static void ti_buf_free(struct circ_buf *cb)
1798 {
1799 kfree(cb->buf);
1800 kfree(cb);
1801 }
1802
1803
1804 /*
1805 * ti_buf_clear
1806 *
1807 * Clear out all data in the circular buffer.
1808 */
1809
1810 static void ti_buf_clear(struct circ_buf *cb)
1811 {
1812 cb->head = cb->tail = 0;
1813 }
1814
1815
1816 /*
1817 * ti_buf_data_avail
1818 *
1819 * Return the number of bytes of data available in the circular
1820 * buffer.
1821 */
1822
1823 static int ti_buf_data_avail(struct circ_buf *cb)
1824 {
1825 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1826 }
1827
1828
1829 /*
1830 * ti_buf_space_avail
1831 *
1832 * Return the number of bytes of space available in the circular
1833 * buffer.
1834 */
1835
1836 static int ti_buf_space_avail(struct circ_buf *cb)
1837 {
1838 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1839 }
1840
1841
1842 /*
1843 * ti_buf_put
1844 *
1845 * Copy data data from a user buffer and put it into the circular buffer.
1846 * Restrict to the amount of space available.
1847 *
1848 * Return the number of bytes copied.
1849 */
1850
1851 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1852 {
1853 int c, ret = 0;
1854
1855 while (1) {
1856 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1857 if (count < c)
1858 c = count;
1859 if (c <= 0)
1860 break;
1861 memcpy(cb->buf + cb->head, buf, c);
1862 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1863 buf += c;
1864 count -= c;
1865 ret += c;
1866 }
1867
1868 return ret;
1869 }
1870
1871
1872 /*
1873 * ti_buf_get
1874 *
1875 * Get data from the circular buffer and copy to the given buffer.
1876 * Restrict to the amount of data available.
1877 *
1878 * Return the number of bytes copied.
1879 */
1880
1881 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1882 {
1883 int c, ret = 0;
1884
1885 while (1) {
1886 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1887 if (count < c)
1888 c = count;
1889 if (c <= 0)
1890 break;
1891 memcpy(buf, cb->buf + cb->tail, c);
1892 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1893 buf += c;
1894 count -= c;
1895 ret += c;
1896 }
1897
1898 return ret;
1899 }
Linux kernel - Deliverables
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