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USB: serial: remove unneeded number endpoints settings
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / ti_usb_3410_5052.c
blobf3bbf777c81ae548974b602fe803aaa6e2ef7195
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/init.h>
74 #include <linux/slab.h>
75 #include <linux/tty.h>
76 #include <linux/tty_driver.h>
77 #include <linux/tty_flip.h>
78 #include <linux/module.h>
79 #include <linux/spinlock.h>
80 #include <linux/ioctl.h>
81 #include <linux/serial.h>
82 #include <linux/circ_buf.h>
83 #include <linux/mutex.h>
84 #include <asm/uaccess.h>
85 #include <linux/usb.h>
86 #include <linux/usb/serial.h>
87
88 #include "ti_usb_3410_5052.h"
89 #include "ti_fw_3410.h" /* firmware image for 3410 */
90 #include "ti_fw_5052.h" /* firmware image for 5052 */
91
92
93 /* Defines */
94
95 #define TI_DRIVER_VERSION "v0.9"
96 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
97 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
98
99 #define TI_FIRMWARE_BUF_SIZE 16284
100
101 #define TI_WRITE_BUF_SIZE 1024
102
103 #define TI_TRANSFER_TIMEOUT 2
104
105 #define TI_DEFAULT_LOW_LATENCY 0
106 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
107
108 /* supported setserial flags */
109 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
110
111 /* read urb states */
112 #define TI_READ_URB_RUNNING 0
113 #define TI_READ_URB_STOPPING 1
114 #define TI_READ_URB_STOPPED 2
115
116 #define TI_EXTRA_VID_PID_COUNT 5
117
118
119 /* Structures */
120
121 struct ti_port {
122 int tp_is_open;
123 __u8 tp_msr;
124 __u8 tp_lsr;
125 __u8 tp_shadow_mcr;
126 __u8 tp_uart_mode; /* 232 or 485 modes */
127 unsigned int tp_uart_base_addr;
128 int tp_flags;
129 int tp_closing_wait;/* in .01 secs */
130 struct async_icount tp_icount;
131 wait_queue_head_t tp_msr_wait; /* wait for msr change */
132 wait_queue_head_t tp_write_wait;
133 struct ti_device *tp_tdev;
134 struct usb_serial_port *tp_port;
135 spinlock_t tp_lock;
136 int tp_read_urb_state;
137 int tp_write_urb_in_use;
138 struct circ_buf *tp_write_buf;
139 };
140
141 struct ti_device {
142 struct mutex td_open_close_lock;
143 int td_open_port_count;
144 struct usb_serial *td_serial;
145 int td_is_3410;
146 int td_urb_error;
147 };
148
149
150 /* Function Declarations */
151
152 static int ti_startup(struct usb_serial *serial);
153 static void ti_shutdown(struct usb_serial *serial);
154 static int ti_open(struct usb_serial_port *port, struct file *file);
155 static void ti_close(struct usb_serial_port *port, struct file *file);
156 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
157 int count);
158 static int ti_write_room(struct usb_serial_port *port);
159 static int ti_chars_in_buffer(struct usb_serial_port *port);
160 static void ti_throttle(struct usb_serial_port *port);
161 static void ti_unthrottle(struct usb_serial_port *port);
162 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
163 static void ti_set_termios(struct usb_serial_port *port,
164 struct ktermios *old_termios);
165 static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
166 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
167 unsigned int set, unsigned int clear);
168 static void ti_break(struct usb_serial_port *port, int break_state);
169 static void ti_interrupt_callback(struct urb *urb);
170 static void ti_bulk_in_callback(struct urb *urb);
171 static void ti_bulk_out_callback(struct urb *urb);
172
173 static void ti_recv(struct device *dev, struct tty_struct *tty,
174 unsigned char *data, int length);
175 static void ti_send(struct ti_port *tport);
176 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
177 static int ti_get_lsr(struct ti_port *tport);
178 static int ti_get_serial_info(struct ti_port *tport,
179 struct serial_struct __user *ret_arg);
180 static int ti_set_serial_info(struct ti_port *tport,
181 struct serial_struct __user *new_arg);
182 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
183
184 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
185
186 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
187 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
188
189 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
190 __u16 moduleid, __u16 value, __u8 *data, int size);
191 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
192 __u16 moduleid, __u16 value, __u8 *data, int size);
193
194 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
195 __u8 mask, __u8 byte);
196
197 static int ti_download_firmware(struct ti_device *tdev,
198 unsigned char *firmware, unsigned int firmware_size);
199
200 /* circular buffer */
201 static struct circ_buf *ti_buf_alloc(void);
202 static void ti_buf_free(struct circ_buf *cb);
203 static void ti_buf_clear(struct circ_buf *cb);
204 static int ti_buf_data_avail(struct circ_buf *cb);
205 static int ti_buf_space_avail(struct circ_buf *cb);
206 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
207 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
208
209
210 /* Data */
211
212 /* module parameters */
213 static int debug;
214 static int low_latency = TI_DEFAULT_LOW_LATENCY;
215 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
216 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
217 static unsigned int vendor_3410_count;
218 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
219 static unsigned int product_3410_count;
220 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
221 static unsigned int vendor_5052_count;
222 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
223 static unsigned int product_5052_count;
224
225 /* supported devices */
226 /* the array dimension is the number of default entries plus */
227 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
228 /* null entry */
229 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
230 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
231 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
232 };
233
234 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
235 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
236 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
237 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
238 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
239 };
240
241 static struct usb_device_id ti_id_table_combined[] = {
242 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
243 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
244 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
245 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
246 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
247 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
248 { }
249 };
250
251 static struct usb_driver ti_usb_driver = {
252 .name = "ti_usb_3410_5052",
253 .probe = usb_serial_probe,
254 .disconnect = usb_serial_disconnect,
255 .id_table = ti_id_table_combined,
256 .no_dynamic_id = 1,
257 };
258
259 static struct usb_serial_driver ti_1port_device = {
260 .driver = {
261 .owner = THIS_MODULE,
262 .name = "ti_usb_3410_5052_1",
263 },
264 .description = "TI USB 3410 1 port adapter",
265 .usb_driver = &ti_usb_driver,
266 .id_table = ti_id_table_3410,
267 .num_ports = 1,
268 .attach = ti_startup,
269 .shutdown = ti_shutdown,
270 .open = ti_open,
271 .close = ti_close,
272 .write = ti_write,
273 .write_room = ti_write_room,
274 .chars_in_buffer = ti_chars_in_buffer,
275 .throttle = ti_throttle,
276 .unthrottle = ti_unthrottle,
277 .ioctl = ti_ioctl,
278 .set_termios = ti_set_termios,
279 .tiocmget = ti_tiocmget,
280 .tiocmset = ti_tiocmset,
281 .break_ctl = ti_break,
282 .read_int_callback = ti_interrupt_callback,
283 .read_bulk_callback = ti_bulk_in_callback,
284 .write_bulk_callback = ti_bulk_out_callback,
285 };
286
287 static struct usb_serial_driver ti_2port_device = {
288 .driver = {
289 .owner = THIS_MODULE,
290 .name = "ti_usb_3410_5052_2",
291 },
292 .description = "TI USB 5052 2 port adapter",
293 .usb_driver = &ti_usb_driver,
294 .id_table = ti_id_table_5052,
295 .num_ports = 2,
296 .attach = ti_startup,
297 .shutdown = ti_shutdown,
298 .open = ti_open,
299 .close = ti_close,
300 .write = ti_write,
301 .write_room = ti_write_room,
302 .chars_in_buffer = ti_chars_in_buffer,
303 .throttle = ti_throttle,
304 .unthrottle = ti_unthrottle,
305 .ioctl = ti_ioctl,
306 .set_termios = ti_set_termios,
307 .tiocmget = ti_tiocmget,
308 .tiocmset = ti_tiocmset,
309 .break_ctl = ti_break,
310 .read_int_callback = ti_interrupt_callback,
311 .read_bulk_callback = ti_bulk_in_callback,
312 .write_bulk_callback = ti_bulk_out_callback,
313 };
314
315
316 /* Module */
317
318 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
319 MODULE_DESCRIPTION(TI_DRIVER_DESC);
320 MODULE_VERSION(TI_DRIVER_VERSION);
321 MODULE_LICENSE("GPL");
322
323 module_param(debug, bool, S_IRUGO | S_IWUSR);
324 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
325
326 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
327 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
328
329 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
330 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
331
332 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
333 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
334 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
335 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
336 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
337 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
338 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
339 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
340
341 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
342
343
344 /* Functions */
345
346 static int __init ti_init(void)
347 {
348 int i,j;
349 int ret;
350
351 /* insert extra vendor and product ids */
352 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
353 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
354 ti_id_table_3410[j].idVendor = vendor_3410[i];
355 ti_id_table_3410[j].idProduct = product_3410[i];
356 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
357 }
358 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
359 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
360 ti_id_table_5052[j].idVendor = vendor_5052[i];
361 ti_id_table_5052[j].idProduct = product_5052[i];
362 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
363 }
364
365 ret = usb_serial_register(&ti_1port_device);
366 if (ret)
367 goto failed_1port;
368 ret = usb_serial_register(&ti_2port_device);
369 if (ret)
370 goto failed_2port;
371
372 ret = usb_register(&ti_usb_driver);
373 if (ret)
374 goto failed_usb;
375
376 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
377
378 return 0;
379
380 failed_usb:
381 usb_serial_deregister(&ti_2port_device);
382 failed_2port:
383 usb_serial_deregister(&ti_1port_device);
384 failed_1port:
385 return ret;
386 }
387
388
389 static void __exit ti_exit(void)
390 {
391 usb_serial_deregister(&ti_1port_device);
392 usb_serial_deregister(&ti_2port_device);
393 usb_deregister(&ti_usb_driver);
394 }
395
396
397 module_init(ti_init);
398 module_exit(ti_exit);
399
400
401 static int ti_startup(struct usb_serial *serial)
402 {
403 struct ti_device *tdev;
404 struct ti_port *tport;
405 struct usb_device *dev = serial->dev;
406 int status;
407 int i;
408
409
410 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
411 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
412 dev->descriptor.bNumConfigurations,
413 dev->actconfig->desc.bConfigurationValue);
414
415 /* create device structure */
416 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
417 if (tdev == NULL) {
418 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
419 return -ENOMEM;
420 }
421 mutex_init(&tdev->td_open_close_lock);
422 tdev->td_serial = serial;
423 usb_set_serial_data(serial, tdev);
424
425 /* determine device type */
426 if (usb_match_id(serial->interface, ti_id_table_3410))
427 tdev->td_is_3410 = 1;
428 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
429
430 /* if we have only 1 configuration, download firmware */
431 if (dev->descriptor.bNumConfigurations == 1) {
432
433 if (tdev->td_is_3410)
434 status = ti_download_firmware(tdev, ti_fw_3410,
435 sizeof(ti_fw_3410));
436 else
437 status = ti_download_firmware(tdev, ti_fw_5052,
438 sizeof(ti_fw_5052));
439 if (status)
440 goto free_tdev;
441
442 /* 3410 must be reset, 5052 resets itself */
443 if (tdev->td_is_3410) {
444 msleep_interruptible(100);
445 usb_reset_device(dev);
446 }
447
448 status = -ENODEV;
449 goto free_tdev;
450 }
451
452 /* the second configuration must be set (in sysfs by hotplug script) */
453 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
454 status = -ENODEV;
455 goto free_tdev;
456 }
457
458 /* set up port structures */
459 for (i = 0; i < serial->num_ports; ++i) {
460 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
461 if (tport == NULL) {
462 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
463 status = -ENOMEM;
464 goto free_tports;
465 }
466 spin_lock_init(&tport->tp_lock);
467 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
468 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
469 tport->tp_closing_wait = closing_wait;
470 init_waitqueue_head(&tport->tp_msr_wait);
471 init_waitqueue_head(&tport->tp_write_wait);
472 tport->tp_write_buf = ti_buf_alloc();
473 if (tport->tp_write_buf == NULL) {
474 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
475 kfree(tport);
476 status = -ENOMEM;
477 goto free_tports;
478 }
479 tport->tp_port = serial->port[i];
480 tport->tp_tdev = tdev;
481 usb_set_serial_port_data(serial->port[i], tport);
482 tport->tp_uart_mode = 0; /* default is RS232 */
483 }
484
485 return 0;
486
487 free_tports:
488 for (--i; i>=0; --i) {
489 tport = usb_get_serial_port_data(serial->port[i]);
490 ti_buf_free(tport->tp_write_buf);
491 kfree(tport);
492 usb_set_serial_port_data(serial->port[i], NULL);
493 }
494 free_tdev:
495 kfree(tdev);
496 usb_set_serial_data(serial, NULL);
497 return status;
498 }
499
500
501 static void ti_shutdown(struct usb_serial *serial)
502 {
503 int i;
504 struct ti_device *tdev = usb_get_serial_data(serial);
505 struct ti_port *tport;
506
507 dbg("%s", __FUNCTION__);
508
509 for (i=0; i < serial->num_ports; ++i) {
510 tport = usb_get_serial_port_data(serial->port[i]);
511 if (tport) {
512 ti_buf_free(tport->tp_write_buf);
513 kfree(tport);
514 usb_set_serial_port_data(serial->port[i], NULL);
515 }
516 }
517
518 kfree(tdev);
519 usb_set_serial_data(serial, NULL);
520 }
521
522
523 static int ti_open(struct usb_serial_port *port, struct file *file)
524 {
525 struct ti_port *tport = usb_get_serial_port_data(port);
526 struct ti_device *tdev;
527 struct usb_device *dev;
528 struct urb *urb;
529 int port_number;
530 int status;
531 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
532 TI_PIPE_TIMEOUT_ENABLE |
533 (TI_TRANSFER_TIMEOUT << 2));
534
535 dbg("%s - port %d", __FUNCTION__, port->number);
536
537 if (tport == NULL)
538 return -ENODEV;
539
540 dev = port->serial->dev;
541 tdev = tport->tp_tdev;
542
543 /* only one open on any port on a device at a time */
544 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
545 return -ERESTARTSYS;
546
547 if (port->tty)
548 port->tty->low_latency =
549 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
550
551 port_number = port->number - port->serial->minor;
552
553 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
554
555 tport->tp_msr = 0;
556 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
557
558 /* start interrupt urb the first time a port is opened on this device */
559 if (tdev->td_open_port_count == 0) {
560 dbg("%s - start interrupt in urb", __FUNCTION__);
561 urb = tdev->td_serial->port[0]->interrupt_in_urb;
562 if (!urb) {
563 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
564 status = -EINVAL;
565 goto release_lock;
566 }
567 urb->complete = ti_interrupt_callback;
568 urb->context = tdev;
569 urb->dev = dev;
570 status = usb_submit_urb(urb, GFP_KERNEL);
571 if (status) {
572 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
573 goto release_lock;
574 }
575 }
576
577 ti_set_termios(port, port->tty->termios);
578
579 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
580 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
581 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
582 if (status) {
583 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
584 goto unlink_int_urb;
585 }
586
587 dbg("%s - sending TI_START_PORT", __FUNCTION__);
588 status = ti_command_out_sync(tdev, TI_START_PORT,
589 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
590 if (status) {
591 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
592 goto unlink_int_urb;
593 }
594
595 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
596 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
597 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
598 if (status) {
599 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
600 goto unlink_int_urb;
601 }
602 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
603 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
604 if (status) {
605 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
606 goto unlink_int_urb;
607 }
608
609 /* reset the data toggle on the bulk endpoints to work around bug in
610 * host controllers where things get out of sync some times */
611 usb_clear_halt(dev, port->write_urb->pipe);
612 usb_clear_halt(dev, port->read_urb->pipe);
613
614 ti_set_termios(port, port->tty->termios);
615
616 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
617 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
618 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
619 if (status) {
620 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
621 goto unlink_int_urb;
622 }
623
624 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
625 status = ti_command_out_sync(tdev, TI_START_PORT,
626 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
627 if (status) {
628 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
629 goto unlink_int_urb;
630 }
631
632 /* start read urb */
633 dbg("%s - start read urb", __FUNCTION__);
634 urb = port->read_urb;
635 if (!urb) {
636 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
637 status = -EINVAL;
638 goto unlink_int_urb;
639 }
640 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
641 urb->complete = ti_bulk_in_callback;
642 urb->context = tport;
643 urb->dev = dev;
644 status = usb_submit_urb(urb, GFP_KERNEL);
645 if (status) {
646 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
647 goto unlink_int_urb;
648 }
649
650 tport->tp_is_open = 1;
651 ++tdev->td_open_port_count;
652
653 goto release_lock;
654
655 unlink_int_urb:
656 if (tdev->td_open_port_count == 0)
657 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
658 release_lock:
659 mutex_unlock(&tdev->td_open_close_lock);
660 dbg("%s - exit %d", __FUNCTION__, status);
661 return status;
662 }
663
664
665 static void ti_close(struct usb_serial_port *port, struct file *file)
666 {
667 struct ti_device *tdev;
668 struct ti_port *tport;
669 int port_number;
670 int status;
671 int do_unlock;
672
673 dbg("%s - port %d", __FUNCTION__, port->number);
674
675 tdev = usb_get_serial_data(port->serial);
676 tport = usb_get_serial_port_data(port);
677 if (tdev == NULL || tport == NULL)
678 return;
679
680 tport->tp_is_open = 0;
681
682 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
683
684 usb_kill_urb(port->read_urb);
685 usb_kill_urb(port->write_urb);
686 tport->tp_write_urb_in_use = 0;
687
688 port_number = port->number - port->serial->minor;
689
690 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
691 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
692 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
693 if (status)
694 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
695
696 /* if mutex_lock is interrupted, continue anyway */
697 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
698 --tport->tp_tdev->td_open_port_count;
699 if (tport->tp_tdev->td_open_port_count <= 0) {
700 /* last port is closed, shut down interrupt urb */
701 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
702 tport->tp_tdev->td_open_port_count = 0;
703 }
704 if (do_unlock)
705 mutex_unlock(&tdev->td_open_close_lock);
706
707 dbg("%s - exit", __FUNCTION__);
708 }
709
710
711 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
712 int count)
713 {
714 struct ti_port *tport = usb_get_serial_port_data(port);
715 unsigned long flags;
716
717 dbg("%s - port %d", __FUNCTION__, port->number);
718
719 if (count == 0) {
720 dbg("%s - write request of 0 bytes", __FUNCTION__);
721 return 0;
722 }
723
724 if (tport == NULL || !tport->tp_is_open)
725 return -ENODEV;
726
727 spin_lock_irqsave(&tport->tp_lock, flags);
728 count = ti_buf_put(tport->tp_write_buf, data, count);
729 spin_unlock_irqrestore(&tport->tp_lock, flags);
730
731 ti_send(tport);
732
733 return count;
734 }
735
736
737 static int ti_write_room(struct usb_serial_port *port)
738 {
739 struct ti_port *tport = usb_get_serial_port_data(port);
740 int room = 0;
741 unsigned long flags;
742
743 dbg("%s - port %d", __FUNCTION__, port->number);
744
745 if (tport == NULL)
746 return -ENODEV;
747
748 spin_lock_irqsave(&tport->tp_lock, flags);
749 room = ti_buf_space_avail(tport->tp_write_buf);
750 spin_unlock_irqrestore(&tport->tp_lock, flags);
751
752 dbg("%s - returns %d", __FUNCTION__, room);
753 return room;
754 }
755
756
757 static int ti_chars_in_buffer(struct usb_serial_port *port)
758 {
759 struct ti_port *tport = usb_get_serial_port_data(port);
760 int chars = 0;
761 unsigned long flags;
762
763 dbg("%s - port %d", __FUNCTION__, port->number);
764
765 if (tport == NULL)
766 return -ENODEV;
767
768 spin_lock_irqsave(&tport->tp_lock, flags);
769 chars = ti_buf_data_avail(tport->tp_write_buf);
770 spin_unlock_irqrestore(&tport->tp_lock, flags);
771
772 dbg("%s - returns %d", __FUNCTION__, chars);
773 return chars;
774 }
775
776
777 static void ti_throttle(struct usb_serial_port *port)
778 {
779 struct ti_port *tport = usb_get_serial_port_data(port);
780 struct tty_struct *tty;
781
782 dbg("%s - port %d", __FUNCTION__, port->number);
783
784 if (tport == NULL)
785 return;
786
787 tty = port->tty;
788 if (!tty) {
789 dbg("%s - no tty", __FUNCTION__);
790 return;
791 }
792
793 if (I_IXOFF(tty) || C_CRTSCTS(tty))
794 ti_stop_read(tport, tty);
795
796 }
797
798
799 static void ti_unthrottle(struct usb_serial_port *port)
800 {
801 struct ti_port *tport = usb_get_serial_port_data(port);
802 struct tty_struct *tty;
803 int status;
804
805 dbg("%s - port %d", __FUNCTION__, port->number);
806
807 if (tport == NULL)
808 return;
809
810 tty = port->tty;
811 if (!tty) {
812 dbg("%s - no tty", __FUNCTION__);
813 return;
814 }
815
816 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
817 status = ti_restart_read(tport, tty);
818 if (status)
819 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
820 }
821 }
822
823
824 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
825 unsigned int cmd, unsigned long arg)
826 {
827 struct ti_port *tport = usb_get_serial_port_data(port);
828 struct async_icount cnow;
829 struct async_icount cprev;
830
831 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
832
833 if (tport == NULL)
834 return -ENODEV;
835
836 switch (cmd) {
837 case TIOCGSERIAL:
838 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
839 return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
840 break;
841
842 case TIOCSSERIAL:
843 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
844 return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
845 break;
846
847 case TIOCMIWAIT:
848 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
849 cprev = tport->tp_icount;
850 while (1) {
851 interruptible_sleep_on(&tport->tp_msr_wait);
852 if (signal_pending(current))
853 return -ERESTARTSYS;
854 cnow = tport->tp_icount;
855 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
856 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
857 return -EIO; /* no change => error */
858 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
859 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
860 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
861 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
862 return 0;
863 }
864 cprev = cnow;
865 }
866 break;
867
868 case TIOCGICOUNT:
869 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
870 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
871 return -EFAULT;
872 return 0;
873 }
874
875 return -ENOIOCTLCMD;
876 }
877
878
879 static void ti_set_termios(struct usb_serial_port *port,
880 struct ktermios *old_termios)
881 {
882 struct ti_port *tport = usb_get_serial_port_data(port);
883 struct tty_struct *tty = port->tty;
884 struct ti_uart_config *config;
885 tcflag_t cflag,iflag;
886 int baud;
887 int status;
888 int port_number = port->number - port->serial->minor;
889 unsigned int mcr;
890
891 dbg("%s - port %d", __FUNCTION__, port->number);
892
893 cflag = tty->termios->c_cflag;
894 iflag = tty->termios->c_iflag;
895
896 dbg("%s - cflag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
897 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
898
899 if (tport == NULL)
900 return;
901
902 config = kmalloc(sizeof(*config), GFP_KERNEL);
903 if (!config) {
904 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
905 return;
906 }
907
908 config->wFlags = 0;
909
910 /* these flags must be set */
911 config->wFlags |= TI_UART_ENABLE_MS_INTS;
912 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
913 config->bUartMode = (__u8)(tport->tp_uart_mode);
914
915 switch (cflag & CSIZE) {
916 case CS5:
917 config->bDataBits = TI_UART_5_DATA_BITS;
918 break;
919 case CS6:
920 config->bDataBits = TI_UART_6_DATA_BITS;
921 break;
922 case CS7:
923 config->bDataBits = TI_UART_7_DATA_BITS;
924 break;
925 default:
926 case CS8:
927 config->bDataBits = TI_UART_8_DATA_BITS;
928 break;
929 }
930
931 /* CMSPAR isn't supported by this driver */
932 tty->termios->c_cflag &= ~CMSPAR;
933
934 if (cflag & PARENB) {
935 if (cflag & PARODD) {
936 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
937 config->bParity = TI_UART_ODD_PARITY;
938 } else {
939 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
940 config->bParity = TI_UART_EVEN_PARITY;
941 }
942 } else {
943 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
944 config->bParity = TI_UART_NO_PARITY;
945 }
946
947 if (cflag & CSTOPB)
948 config->bStopBits = TI_UART_2_STOP_BITS;
949 else
950 config->bStopBits = TI_UART_1_STOP_BITS;
951
952 if (cflag & CRTSCTS) {
953 /* RTS flow control must be off to drop RTS for baud rate B0 */
954 if ((cflag & CBAUD) != B0)
955 config->wFlags |= TI_UART_ENABLE_RTS_IN;
956 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
957 } else {
958 tty->hw_stopped = 0;
959 ti_restart_read(tport, tty);
960 }
961
962 if (I_IXOFF(tty) || I_IXON(tty)) {
963 config->cXon = START_CHAR(tty);
964 config->cXoff = STOP_CHAR(tty);
965
966 if (I_IXOFF(tty))
967 config->wFlags |= TI_UART_ENABLE_X_IN;
968 else
969 ti_restart_read(tport, tty);
970
971 if (I_IXON(tty))
972 config->wFlags |= TI_UART_ENABLE_X_OUT;
973 }
974
975 baud = tty_get_baud_rate(tty);
976 if (!baud)
977 baud = 9600;
978 if (tport->tp_tdev->td_is_3410)
979 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
980 else
981 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
982
983 /* FIXME: Should calculate resulting baud here and report it back */
984 if ((cflag & CBAUD) != B0)
985 tty_encode_baud_rate(tty, baud, baud);
986
987 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
988 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
989
990 cpu_to_be16s(&config->wBaudRate);
991 cpu_to_be16s(&config->wFlags);
992
993 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
994 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
995 sizeof(*config));
996 if (status)
997 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
998
999 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1000 mcr = tport->tp_shadow_mcr;
1001 /* if baud rate is B0, clear RTS and DTR */
1002 if ((cflag & CBAUD) == B0)
1003 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1004 status = ti_set_mcr(tport, mcr);
1005 if (status)
1006 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1007
1008 kfree(config);
1009 }
1010
1011
1012 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1013 {
1014 struct ti_port *tport = usb_get_serial_port_data(port);
1015 unsigned int result;
1016 unsigned int msr;
1017 unsigned int mcr;
1018 unsigned long flags;
1019
1020 dbg("%s - port %d", __FUNCTION__, port->number);
1021
1022 if (tport == NULL)
1023 return -ENODEV;
1024
1025 spin_lock_irqsave(&tport->tp_lock, flags);
1026 msr = tport->tp_msr;
1027 mcr = tport->tp_shadow_mcr;
1028 spin_unlock_irqrestore(&tport->tp_lock, flags);
1029
1030 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1031 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1032 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1033 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1034 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1035 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1036 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1037
1038 dbg("%s - 0x%04X", __FUNCTION__, result);
1039
1040 return result;
1041 }
1042
1043
1044 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1045 unsigned int set, unsigned int clear)
1046 {
1047 struct ti_port *tport = usb_get_serial_port_data(port);
1048 unsigned int mcr;
1049 unsigned long flags;
1050
1051 dbg("%s - port %d", __FUNCTION__, port->number);
1052
1053 if (tport == NULL)
1054 return -ENODEV;
1055
1056 spin_lock_irqsave(&tport->tp_lock, flags);
1057 mcr = tport->tp_shadow_mcr;
1058
1059 if (set & TIOCM_RTS)
1060 mcr |= TI_MCR_RTS;
1061 if (set & TIOCM_DTR)
1062 mcr |= TI_MCR_DTR;
1063 if (set & TIOCM_LOOP)
1064 mcr |= TI_MCR_LOOP;
1065
1066 if (clear & TIOCM_RTS)
1067 mcr &= ~TI_MCR_RTS;
1068 if (clear & TIOCM_DTR)
1069 mcr &= ~TI_MCR_DTR;
1070 if (clear & TIOCM_LOOP)
1071 mcr &= ~TI_MCR_LOOP;
1072 spin_unlock_irqrestore(&tport->tp_lock, flags);
1073
1074 return ti_set_mcr(tport, mcr);
1075 }
1076
1077
1078 static void ti_break(struct usb_serial_port *port, int break_state)
1079 {
1080 struct ti_port *tport = usb_get_serial_port_data(port);
1081 int status;
1082
1083 dbg("%s - state = %d", __FUNCTION__, break_state);
1084
1085 if (tport == NULL)
1086 return;
1087
1088 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1089
1090 status = ti_write_byte(tport->tp_tdev,
1091 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1092 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1093
1094 if (status)
1095 dbg("%s - error setting break, %d", __FUNCTION__, status);
1096 }
1097
1098
1099 static void ti_interrupt_callback(struct urb *urb)
1100 {
1101 struct ti_device *tdev = (struct ti_device *)urb->context;
1102 struct usb_serial_port *port;
1103 struct usb_serial *serial = tdev->td_serial;
1104 struct ti_port *tport;
1105 struct device *dev = &urb->dev->dev;
1106 unsigned char *data = urb->transfer_buffer;
1107 int length = urb->actual_length;
1108 int port_number;
1109 int function;
1110 int status = urb->status;
1111 int retval;
1112 __u8 msr;
1113
1114 dbg("%s", __FUNCTION__);
1115
1116 switch (status) {
1117 case 0:
1118 break;
1119 case -ECONNRESET:
1120 case -ENOENT:
1121 case -ESHUTDOWN:
1122 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1123 tdev->td_urb_error = 1;
1124 return;
1125 default:
1126 dev_err(dev, "%s - nonzero urb status, %d\n",
1127 __FUNCTION__, status);
1128 tdev->td_urb_error = 1;
1129 goto exit;
1130 }
1131
1132 if (length != 2) {
1133 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1134 goto exit;
1135 }
1136
1137 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1138 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1139 goto exit;
1140 }
1141
1142 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1143 function = TI_GET_FUNC_FROM_CODE(data[0]);
1144
1145 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1146
1147 if (port_number >= serial->num_ports) {
1148 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1149 goto exit;
1150 }
1151
1152 port = serial->port[port_number];
1153
1154 tport = usb_get_serial_port_data(port);
1155 if (!tport)
1156 goto exit;
1157
1158 switch (function) {
1159 case TI_CODE_DATA_ERROR:
1160 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1161 break;
1162
1163 case TI_CODE_MODEM_STATUS:
1164 msr = data[1];
1165 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1166 ti_handle_new_msr(tport, msr);
1167 break;
1168
1169 default:
1170 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1171 break;
1172 }
1173
1174 exit:
1175 retval = usb_submit_urb(urb, GFP_ATOMIC);
1176 if (retval)
1177 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1178 __FUNCTION__, retval);
1179 }
1180
1181
1182 static void ti_bulk_in_callback(struct urb *urb)
1183 {
1184 struct ti_port *tport = (struct ti_port *)urb->context;
1185 struct usb_serial_port *port = tport->tp_port;
1186 struct device *dev = &urb->dev->dev;
1187 int status = urb->status;
1188 int retval = 0;
1189
1190 dbg("%s", __FUNCTION__);
1191
1192 switch (status) {
1193 case 0:
1194 break;
1195 case -ECONNRESET:
1196 case -ENOENT:
1197 case -ESHUTDOWN:
1198 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1199 tport->tp_tdev->td_urb_error = 1;
1200 wake_up_interruptible(&tport->tp_write_wait);
1201 return;
1202 default:
1203 dev_err(dev, "%s - nonzero urb status, %d\n",
1204 __FUNCTION__, status );
1205 tport->tp_tdev->td_urb_error = 1;
1206 wake_up_interruptible(&tport->tp_write_wait);
1207 }
1208
1209 if (status == -EPIPE)
1210 goto exit;
1211
1212 if (status) {
1213 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1214 return;
1215 }
1216
1217 if (port->tty && urb->actual_length) {
1218 usb_serial_debug_data(debug, dev, __FUNCTION__,
1219 urb->actual_length, urb->transfer_buffer);
1220
1221 if (!tport->tp_is_open)
1222 dbg("%s - port closed, dropping data", __FUNCTION__);
1223 else
1224 ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1225 urb->actual_length);
1226
1227 spin_lock(&tport->tp_lock);
1228 tport->tp_icount.rx += urb->actual_length;
1229 spin_unlock(&tport->tp_lock);
1230 }
1231
1232 exit:
1233 /* continue to read unless stopping */
1234 spin_lock(&tport->tp_lock);
1235 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1236 urb->dev = port->serial->dev;
1237 retval = usb_submit_urb(urb, GFP_ATOMIC);
1238 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1239 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1240 }
1241 spin_unlock(&tport->tp_lock);
1242 if (retval)
1243 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1244 __FUNCTION__, retval);
1245 }
1246
1247
1248 static void ti_bulk_out_callback(struct urb *urb)
1249 {
1250 struct ti_port *tport = (struct ti_port *)urb->context;
1251 struct usb_serial_port *port = tport->tp_port;
1252 struct device *dev = &urb->dev->dev;
1253 int status = urb->status;
1254
1255 dbg("%s - port %d", __FUNCTION__, port->number);
1256
1257 tport->tp_write_urb_in_use = 0;
1258
1259 switch (status) {
1260 case 0:
1261 break;
1262 case -ECONNRESET:
1263 case -ENOENT:
1264 case -ESHUTDOWN:
1265 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1266 tport->tp_tdev->td_urb_error = 1;
1267 wake_up_interruptible(&tport->tp_write_wait);
1268 return;
1269 default:
1270 dev_err(dev, "%s - nonzero urb status, %d\n",
1271 __FUNCTION__, status);
1272 tport->tp_tdev->td_urb_error = 1;
1273 wake_up_interruptible(&tport->tp_write_wait);
1274 }
1275
1276 /* send any buffered data */
1277 ti_send(tport);
1278 }
1279
1280
1281 static void ti_recv(struct device *dev, struct tty_struct *tty,
1282 unsigned char *data, int length)
1283 {
1284 int cnt;
1285
1286 do {
1287 cnt = tty_buffer_request_room(tty, length);
1288 if (cnt < length) {
1289 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1290 if(cnt == 0)
1291 break;
1292 }
1293 tty_insert_flip_string(tty, data, cnt);
1294 tty_flip_buffer_push(tty);
1295 data += cnt;
1296 length -= cnt;
1297 } while (length > 0);
1298
1299 }
1300
1301
1302 static void ti_send(struct ti_port *tport)
1303 {
1304 int count, result;
1305 struct usb_serial_port *port = tport->tp_port;
1306 struct tty_struct *tty = port->tty;
1307 unsigned long flags;
1308
1309
1310 dbg("%s - port %d", __FUNCTION__, port->number);
1311
1312 spin_lock_irqsave(&tport->tp_lock, flags);
1313
1314 if (tport->tp_write_urb_in_use) {
1315 spin_unlock_irqrestore(&tport->tp_lock, flags);
1316 return;
1317 }
1318
1319 count = ti_buf_get(tport->tp_write_buf,
1320 port->write_urb->transfer_buffer,
1321 port->bulk_out_size);
1322
1323 if (count == 0) {
1324 spin_unlock_irqrestore(&tport->tp_lock, flags);
1325 return;
1326 }
1327
1328 tport->tp_write_urb_in_use = 1;
1329
1330 spin_unlock_irqrestore(&tport->tp_lock, flags);
1331
1332 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1333
1334 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1335 usb_sndbulkpipe(port->serial->dev,
1336 port->bulk_out_endpointAddress),
1337 port->write_urb->transfer_buffer, count,
1338 ti_bulk_out_callback, tport);
1339
1340 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1341 if (result) {
1342 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1343 tport->tp_write_urb_in_use = 0;
1344 /* TODO: reschedule ti_send */
1345 } else {
1346 spin_lock_irqsave(&tport->tp_lock, flags);
1347 tport->tp_icount.tx += count;
1348 spin_unlock_irqrestore(&tport->tp_lock, flags);
1349 }
1350
1351 /* more room in the buffer for new writes, wakeup */
1352 if (tty)
1353 tty_wakeup(tty);
1354 wake_up_interruptible(&tport->tp_write_wait);
1355 }
1356
1357
1358 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1359 {
1360 unsigned long flags;
1361 int status;
1362
1363 status = ti_write_byte(tport->tp_tdev,
1364 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1365 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1366
1367 spin_lock_irqsave(&tport->tp_lock, flags);
1368 if (!status)
1369 tport->tp_shadow_mcr = mcr;
1370 spin_unlock_irqrestore(&tport->tp_lock, flags);
1371
1372 return status;
1373 }
1374
1375
1376 static int ti_get_lsr(struct ti_port *tport)
1377 {
1378 int size,status;
1379 struct ti_device *tdev = tport->tp_tdev;
1380 struct usb_serial_port *port = tport->tp_port;
1381 int port_number = port->number - port->serial->minor;
1382 struct ti_port_status *data;
1383
1384 dbg("%s - port %d", __FUNCTION__, port->number);
1385
1386 size = sizeof(struct ti_port_status);
1387 data = kmalloc(size, GFP_KERNEL);
1388 if (!data) {
1389 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1390 return -ENOMEM;
1391 }
1392
1393 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1394 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1395 if (status) {
1396 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1397 goto free_data;
1398 }
1399
1400 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1401
1402 tport->tp_lsr = data->bLSR;
1403
1404 free_data:
1405 kfree(data);
1406 return status;
1407 }
1408
1409
1410 static int ti_get_serial_info(struct ti_port *tport,
1411 struct serial_struct __user *ret_arg)
1412 {
1413 struct usb_serial_port *port = tport->tp_port;
1414 struct serial_struct ret_serial;
1415
1416 if (!ret_arg)
1417 return -EFAULT;
1418
1419 memset(&ret_serial, 0, sizeof(ret_serial));
1420
1421 ret_serial.type = PORT_16550A;
1422 ret_serial.line = port->serial->minor;
1423 ret_serial.port = port->number - port->serial->minor;
1424 ret_serial.flags = tport->tp_flags;
1425 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1426 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1427 ret_serial.closing_wait = tport->tp_closing_wait;
1428
1429 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1430 return -EFAULT;
1431
1432 return 0;
1433 }
1434
1435
1436 static int ti_set_serial_info(struct ti_port *tport,
1437 struct serial_struct __user *new_arg)
1438 {
1439 struct usb_serial_port *port = tport->tp_port;
1440 struct serial_struct new_serial;
1441
1442 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1443 return -EFAULT;
1444
1445 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1446 if (port->tty)
1447 port->tty->low_latency =
1448 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1449 tport->tp_closing_wait = new_serial.closing_wait;
1450
1451 return 0;
1452 }
1453
1454
1455 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1456 {
1457 struct async_icount *icount;
1458 struct tty_struct *tty;
1459 unsigned long flags;
1460
1461 dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1462
1463 if (msr & TI_MSR_DELTA_MASK) {
1464 spin_lock_irqsave(&tport->tp_lock, flags);
1465 icount = &tport->tp_icount;
1466 if (msr & TI_MSR_DELTA_CTS)
1467 icount->cts++;
1468 if (msr & TI_MSR_DELTA_DSR)
1469 icount->dsr++;
1470 if (msr & TI_MSR_DELTA_CD)
1471 icount->dcd++;
1472 if (msr & TI_MSR_DELTA_RI)
1473 icount->rng++;
1474 wake_up_interruptible(&tport->tp_msr_wait);
1475 spin_unlock_irqrestore(&tport->tp_lock, flags);
1476 }
1477
1478 tport->tp_msr = msr & TI_MSR_MASK;
1479
1480 /* handle CTS flow control */
1481 tty = tport->tp_port->tty;
1482 if (tty && C_CRTSCTS(tty)) {
1483 if (msr & TI_MSR_CTS) {
1484 tty->hw_stopped = 0;
1485 tty_wakeup(tty);
1486 } else {
1487 tty->hw_stopped = 1;
1488 }
1489 }
1490 }
1491
1492
1493 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1494 {
1495 struct ti_device *tdev = tport->tp_tdev;
1496 struct usb_serial_port *port = tport->tp_port;
1497 wait_queue_t wait;
1498
1499 dbg("%s - port %d", __FUNCTION__, port->number);
1500
1501 spin_lock_irq(&tport->tp_lock);
1502
1503 /* wait for data to drain from the buffer */
1504 tdev->td_urb_error = 0;
1505 init_waitqueue_entry(&wait, current);
1506 add_wait_queue(&tport->tp_write_wait, &wait);
1507 for (;;) {
1508 set_current_state(TASK_INTERRUPTIBLE);
1509 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1510 || timeout == 0 || signal_pending(current)
1511 || tdev->td_urb_error
1512 || port->serial->disconnected) /* disconnect */
1513 break;
1514 spin_unlock_irq(&tport->tp_lock);
1515 timeout = schedule_timeout(timeout);
1516 spin_lock_irq(&tport->tp_lock);
1517 }
1518 set_current_state(TASK_RUNNING);
1519 remove_wait_queue(&tport->tp_write_wait, &wait);
1520
1521 /* flush any remaining data in the buffer */
1522 if (flush)
1523 ti_buf_clear(tport->tp_write_buf);
1524
1525 spin_unlock_irq(&tport->tp_lock);
1526
1527 mutex_lock(&port->serial->disc_mutex);
1528 /* wait for data to drain from the device */
1529 /* wait for empty tx register, plus 20 ms */
1530 timeout += jiffies;
1531 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1532 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1533 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1534 && !port->serial->disconnected) {
1535 if (ti_get_lsr(tport))
1536 break;
1537 mutex_unlock(&port->serial->disc_mutex);
1538 msleep_interruptible(20);
1539 mutex_lock(&port->serial->disc_mutex);
1540 }
1541 mutex_unlock(&port->serial->disc_mutex);
1542 }
1543
1544
1545 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1546 {
1547 unsigned long flags;
1548
1549 spin_lock_irqsave(&tport->tp_lock, flags);
1550
1551 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1552 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1553
1554 spin_unlock_irqrestore(&tport->tp_lock, flags);
1555 }
1556
1557
1558 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1559 {
1560 struct urb *urb;
1561 int status = 0;
1562 unsigned long flags;
1563
1564 spin_lock_irqsave(&tport->tp_lock, flags);
1565
1566 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1567 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1568 urb = tport->tp_port->read_urb;
1569 spin_unlock_irqrestore(&tport->tp_lock, flags);
1570 urb->complete = ti_bulk_in_callback;
1571 urb->context = tport;
1572 urb->dev = tport->tp_port->serial->dev;
1573 status = usb_submit_urb(urb, GFP_KERNEL);
1574 } else {
1575 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1576 spin_unlock_irqrestore(&tport->tp_lock, flags);
1577 }
1578
1579 return status;
1580 }
1581
1582
1583 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1584 __u16 moduleid, __u16 value, __u8 *data, int size)
1585 {
1586 int status;
1587
1588 status = usb_control_msg(tdev->td_serial->dev,
1589 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1590 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1591 value, moduleid, data, size, 1000);
1592
1593 if (status == size)
1594 status = 0;
1595
1596 if (status > 0)
1597 status = -ECOMM;
1598
1599 return status;
1600 }
1601
1602
1603 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1604 __u16 moduleid, __u16 value, __u8 *data, int size)
1605 {
1606 int status;
1607
1608 status = usb_control_msg(tdev->td_serial->dev,
1609 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1610 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1611 value, moduleid, data, size, 1000);
1612
1613 if (status == size)
1614 status = 0;
1615
1616 if (status > 0)
1617 status = -ECOMM;
1618
1619 return status;
1620 }
1621
1622
1623 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1624 __u8 mask, __u8 byte)
1625 {
1626 int status;
1627 unsigned int size;
1628 struct ti_write_data_bytes *data;
1629 struct device *dev = &tdev->td_serial->dev->dev;
1630
1631 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1632
1633 size = sizeof(struct ti_write_data_bytes) + 2;
1634 data = kmalloc(size, GFP_KERNEL);
1635 if (!data) {
1636 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1637 return -ENOMEM;
1638 }
1639
1640 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1641 data->bDataType = TI_RW_DATA_BYTE;
1642 data->bDataCounter = 1;
1643 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1644 data->wBaseAddrLo = cpu_to_be16(addr);
1645 data->bData[0] = mask;
1646 data->bData[1] = byte;
1647
1648 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1649 (__u8 *)data, size);
1650
1651 if (status < 0)
1652 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1653
1654 kfree(data);
1655
1656 return status;
1657 }
1658
1659
1660 static int ti_download_firmware(struct ti_device *tdev,
1661 unsigned char *firmware, unsigned int firmware_size)
1662 {
1663 int status = 0;
1664 int buffer_size;
1665 int pos;
1666 int len;
1667 int done;
1668 __u8 cs = 0;
1669 __u8 *buffer;
1670 struct usb_device *dev = tdev->td_serial->dev;
1671 struct ti_firmware_header *header;
1672 unsigned int pipe = usb_sndbulkpipe(dev,
1673 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1674
1675
1676 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1677 buffer = kmalloc(buffer_size, GFP_KERNEL);
1678 if (!buffer) {
1679 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1680 return -ENOMEM;
1681 }
1682
1683 memcpy(buffer, firmware, firmware_size);
1684 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1685
1686 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1687 cs = (__u8)(cs + buffer[pos]);
1688
1689 header = (struct ti_firmware_header *)buffer;
1690 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1691 header->bCheckSum = cs;
1692
1693 dbg("%s - downloading firmware", __FUNCTION__);
1694 for (pos = 0; pos < buffer_size; pos += done) {
1695 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1696 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1697 if (status)
1698 break;
1699 }
1700
1701 kfree(buffer);
1702
1703 if (status) {
1704 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1705 return status;
1706 }
1707
1708 dbg("%s - download successful", __FUNCTION__);
1709
1710 return 0;
1711 }
1712
1713
1714 /* Circular Buffer Functions */
1715
1716 /*
1717 * ti_buf_alloc
1718 *
1719 * Allocate a circular buffer and all associated memory.
1720 */
1721
1722 static struct circ_buf *ti_buf_alloc(void)
1723 {
1724 struct circ_buf *cb;
1725
1726 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1727 if (cb == NULL)
1728 return NULL;
1729
1730 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1731 if (cb->buf == NULL) {
1732 kfree(cb);
1733 return NULL;
1734 }
1735
1736 ti_buf_clear(cb);
1737
1738 return cb;
1739 }
1740
1741
1742 /*
1743 * ti_buf_free
1744 *
1745 * Free the buffer and all associated memory.
1746 */
1747
1748 static void ti_buf_free(struct circ_buf *cb)
1749 {
1750 kfree(cb->buf);
1751 kfree(cb);
1752 }
1753
1754
1755 /*
1756 * ti_buf_clear
1757 *
1758 * Clear out all data in the circular buffer.
1759 */
1760
1761 static void ti_buf_clear(struct circ_buf *cb)
1762 {
1763 cb->head = cb->tail = 0;
1764 }
1765
1766
1767 /*
1768 * ti_buf_data_avail
1769 *
1770 * Return the number of bytes of data available in the circular
1771 * buffer.
1772 */
1773
1774 static int ti_buf_data_avail(struct circ_buf *cb)
1775 {
1776 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1777 }
1778
1779
1780 /*
1781 * ti_buf_space_avail
1782 *
1783 * Return the number of bytes of space available in the circular
1784 * buffer.
1785 */
1786
1787 static int ti_buf_space_avail(struct circ_buf *cb)
1788 {
1789 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1790 }
1791
1792
1793 /*
1794 * ti_buf_put
1795 *
1796 * Copy data data from a user buffer and put it into the circular buffer.
1797 * Restrict to the amount of space available.
1798 *
1799 * Return the number of bytes copied.
1800 */
1801
1802 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1803 {
1804 int c, ret = 0;
1805
1806 while (1) {
1807 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1808 if (count < c)
1809 c = count;
1810 if (c <= 0)
1811 break;
1812 memcpy(cb->buf + cb->head, buf, c);
1813 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1814 buf += c;
1815 count -= c;
1816 ret += c;
1817 }
1818
1819 return ret;
1820 }
1821
1822
1823 /*
1824 * ti_buf_get
1825 *
1826 * Get data from the circular buffer and copy to the given buffer.
1827 * Restrict to the amount of data available.
1828 *
1829 * Return the number of bytes copied.
1830 */
1831
1832 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1833 {
1834 int c, ret = 0;
1835
1836 while (1) {
1837 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1838 if (count < c)
1839 c = count;
1840 if (c <= 0)
1841 break;
1842 memcpy(buf, cb->buf + cb->tail, c);
1843 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1844 buf += c;
1845 count -= c;
1846 ret += c;
1847 }
1848
1849 return ret;
1850 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree