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tifm_sd: separate command flags, socket flags and register bit masks
[linux-2.6/kvm.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob4203e2b1a761681d0221fc1cf46e5a910d9866b5
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 <asm/uaccess.h>
84 #include <asm/semaphore.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 semaphore td_open_close_sem;
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 int vendor_3410_count;
218 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
219 static int product_3410_count;
220 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
221 static int vendor_5052_count;
222 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
223 static 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_interrupt_in = 1,
268 .num_bulk_in = 1,
269 .num_bulk_out = 1,
270 .num_ports = 1,
271 .attach = ti_startup,
272 .shutdown = ti_shutdown,
273 .open = ti_open,
274 .close = ti_close,
275 .write = ti_write,
276 .write_room = ti_write_room,
277 .chars_in_buffer = ti_chars_in_buffer,
278 .throttle = ti_throttle,
279 .unthrottle = ti_unthrottle,
280 .ioctl = ti_ioctl,
281 .set_termios = ti_set_termios,
282 .tiocmget = ti_tiocmget,
283 .tiocmset = ti_tiocmset,
284 .break_ctl = ti_break,
285 .read_int_callback = ti_interrupt_callback,
286 .read_bulk_callback = ti_bulk_in_callback,
287 .write_bulk_callback = ti_bulk_out_callback,
288 };
289
290 static struct usb_serial_driver ti_2port_device = {
291 .driver = {
292 .owner = THIS_MODULE,
293 .name = "ti_usb_3410_5052_2",
294 },
295 .description = "TI USB 5052 2 port adapter",
296 .usb_driver = &ti_usb_driver,
297 .id_table = ti_id_table_5052,
298 .num_interrupt_in = 1,
299 .num_bulk_in = 2,
300 .num_bulk_out = 2,
301 .num_ports = 2,
302 .attach = ti_startup,
303 .shutdown = ti_shutdown,
304 .open = ti_open,
305 .close = ti_close,
306 .write = ti_write,
307 .write_room = ti_write_room,
308 .chars_in_buffer = ti_chars_in_buffer,
309 .throttle = ti_throttle,
310 .unthrottle = ti_unthrottle,
311 .ioctl = ti_ioctl,
312 .set_termios = ti_set_termios,
313 .tiocmget = ti_tiocmget,
314 .tiocmset = ti_tiocmset,
315 .break_ctl = ti_break,
316 .read_int_callback = ti_interrupt_callback,
317 .read_bulk_callback = ti_bulk_in_callback,
318 .write_bulk_callback = ti_bulk_out_callback,
319 };
320
321
322 /* Module */
323
324 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
325 MODULE_DESCRIPTION(TI_DRIVER_DESC);
326 MODULE_VERSION(TI_DRIVER_VERSION);
327 MODULE_LICENSE("GPL");
328
329 module_param(debug, bool, S_IRUGO | S_IWUSR);
330 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
331
332 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
333 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
334
335 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
336 MODULE_PARM_DESC(closing_wait, "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, "Vendor ids for 3410 based devices, 1-5 short integers");
340 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
341 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
342 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
343 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
344 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
345 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
346
347 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
348
349
350 /* Functions */
351
352 static int __init ti_init(void)
353 {
354 int i,j;
355 int ret;
356
357 /* insert extra vendor and product ids */
358 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
359 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
360 ti_id_table_3410[j].idVendor = vendor_3410[i];
361 ti_id_table_3410[j].idProduct = product_3410[i];
362 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
363 }
364 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
365 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
366 ti_id_table_5052[j].idVendor = vendor_5052[i];
367 ti_id_table_5052[j].idProduct = product_5052[i];
368 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
369 }
370
371 ret = usb_serial_register(&ti_1port_device);
372 if (ret)
373 goto failed_1port;
374 ret = usb_serial_register(&ti_2port_device);
375 if (ret)
376 goto failed_2port;
377
378 ret = usb_register(&ti_usb_driver);
379 if (ret)
380 goto failed_usb;
381
382 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
383
384 return 0;
385
386 failed_usb:
387 usb_serial_deregister(&ti_2port_device);
388 failed_2port:
389 usb_serial_deregister(&ti_1port_device);
390 failed_1port:
391 return ret;
392 }
393
394
395 static void __exit ti_exit(void)
396 {
397 usb_serial_deregister(&ti_1port_device);
398 usb_serial_deregister(&ti_2port_device);
399 usb_deregister(&ti_usb_driver);
400 }
401
402
403 module_init(ti_init);
404 module_exit(ti_exit);
405
406
407 static int ti_startup(struct usb_serial *serial)
408 {
409 struct ti_device *tdev;
410 struct ti_port *tport;
411 struct usb_device *dev = serial->dev;
412 int status;
413 int i;
414
415
416 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
417 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
418 dev->descriptor.bNumConfigurations,
419 dev->actconfig->desc.bConfigurationValue);
420
421 /* create device structure */
422 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
423 if (tdev == NULL) {
424 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
425 return -ENOMEM;
426 }
427 sema_init(&tdev->td_open_close_sem, 1);
428 tdev->td_serial = serial;
429 usb_set_serial_data(serial, tdev);
430
431 /* determine device type */
432 if (usb_match_id(serial->interface, ti_id_table_3410))
433 tdev->td_is_3410 = 1;
434 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
435
436 /* if we have only 1 configuration, download firmware */
437 if (dev->descriptor.bNumConfigurations == 1) {
438
439 if (tdev->td_is_3410)
440 status = ti_download_firmware(tdev, ti_fw_3410,
441 sizeof(ti_fw_3410));
442 else
443 status = ti_download_firmware(tdev, ti_fw_5052,
444 sizeof(ti_fw_5052));
445 if (status)
446 goto free_tdev;
447
448 /* 3410 must be reset, 5052 resets itself */
449 if (tdev->td_is_3410) {
450 msleep_interruptible(100);
451 usb_reset_device(dev);
452 }
453
454 status = -ENODEV;
455 goto free_tdev;
456 }
457
458 /* the second configuration must be set (in sysfs by hotplug script) */
459 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
460 status = -ENODEV;
461 goto free_tdev;
462 }
463
464 /* set up port structures */
465 for (i = 0; i < serial->num_ports; ++i) {
466 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
467 if (tport == NULL) {
468 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
469 status = -ENOMEM;
470 goto free_tports;
471 }
472 spin_lock_init(&tport->tp_lock);
473 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
474 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
475 tport->tp_closing_wait = closing_wait;
476 init_waitqueue_head(&tport->tp_msr_wait);
477 init_waitqueue_head(&tport->tp_write_wait);
478 tport->tp_write_buf = ti_buf_alloc();
479 if (tport->tp_write_buf == NULL) {
480 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
481 kfree(tport);
482 status = -ENOMEM;
483 goto free_tports;
484 }
485 tport->tp_port = serial->port[i];
486 tport->tp_tdev = tdev;
487 usb_set_serial_port_data(serial->port[i], tport);
488 tport->tp_uart_mode = 0; /* default is RS232 */
489 }
490
491 return 0;
492
493 free_tports:
494 for (--i; i>=0; --i) {
495 tport = usb_get_serial_port_data(serial->port[i]);
496 ti_buf_free(tport->tp_write_buf);
497 kfree(tport);
498 usb_set_serial_port_data(serial->port[i], NULL);
499 }
500 free_tdev:
501 kfree(tdev);
502 usb_set_serial_data(serial, NULL);
503 return status;
504 }
505
506
507 static void ti_shutdown(struct usb_serial *serial)
508 {
509 int i;
510 struct ti_device *tdev = usb_get_serial_data(serial);
511 struct ti_port *tport;
512
513 dbg("%s", __FUNCTION__);
514
515 for (i=0; i < serial->num_ports; ++i) {
516 tport = usb_get_serial_port_data(serial->port[i]);
517 if (tport) {
518 ti_buf_free(tport->tp_write_buf);
519 kfree(tport);
520 usb_set_serial_port_data(serial->port[i], NULL);
521 }
522 }
523
524 kfree(tdev);
525 usb_set_serial_data(serial, NULL);
526 }
527
528
529 static int ti_open(struct usb_serial_port *port, struct file *file)
530 {
531 struct ti_port *tport = usb_get_serial_port_data(port);
532 struct ti_device *tdev;
533 struct usb_device *dev;
534 struct urb *urb;
535 int port_number;
536 int status;
537 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
538 TI_PIPE_TIMEOUT_ENABLE |
539 (TI_TRANSFER_TIMEOUT << 2));
540
541 dbg("%s - port %d", __FUNCTION__, port->number);
542
543 if (tport == NULL)
544 return -ENODEV;
545
546 dev = port->serial->dev;
547 tdev = tport->tp_tdev;
548
549 /* only one open on any port on a device at a time */
550 if (down_interruptible(&tdev->td_open_close_sem))
551 return -ERESTARTSYS;
552
553 if (port->tty)
554 port->tty->low_latency =
555 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
556
557 port_number = port->number - port->serial->minor;
558
559 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
560
561 tport->tp_msr = 0;
562 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
563
564 /* start interrupt urb the first time a port is opened on this device */
565 if (tdev->td_open_port_count == 0) {
566 dbg("%s - start interrupt in urb", __FUNCTION__);
567 urb = tdev->td_serial->port[0]->interrupt_in_urb;
568 if (!urb) {
569 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
570 status = -EINVAL;
571 goto up_sem;
572 }
573 urb->complete = ti_interrupt_callback;
574 urb->context = tdev;
575 urb->dev = dev;
576 status = usb_submit_urb(urb, GFP_KERNEL);
577 if (status) {
578 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
579 goto up_sem;
580 }
581 }
582
583 ti_set_termios(port, NULL);
584
585 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
586 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
587 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
588 if (status) {
589 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
590 goto unlink_int_urb;
591 }
592
593 dbg("%s - sending TI_START_PORT", __FUNCTION__);
594 status = ti_command_out_sync(tdev, TI_START_PORT,
595 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
596 if (status) {
597 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
598 goto unlink_int_urb;
599 }
600
601 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
602 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
603 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
604 if (status) {
605 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
606 goto unlink_int_urb;
607 }
608 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
609 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
610 if (status) {
611 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
612 goto unlink_int_urb;
613 }
614
615 /* reset the data toggle on the bulk endpoints to work around bug in
616 * host controllers where things get out of sync some times */
617 usb_clear_halt(dev, port->write_urb->pipe);
618 usb_clear_halt(dev, port->read_urb->pipe);
619
620 ti_set_termios(port, NULL);
621
622 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
623 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
624 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
625 if (status) {
626 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
627 goto unlink_int_urb;
628 }
629
630 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
631 status = ti_command_out_sync(tdev, TI_START_PORT,
632 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
633 if (status) {
634 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
635 goto unlink_int_urb;
636 }
637
638 /* start read urb */
639 dbg("%s - start read urb", __FUNCTION__);
640 urb = port->read_urb;
641 if (!urb) {
642 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
643 status = -EINVAL;
644 goto unlink_int_urb;
645 }
646 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
647 urb->complete = ti_bulk_in_callback;
648 urb->context = tport;
649 urb->dev = dev;
650 status = usb_submit_urb(urb, GFP_KERNEL);
651 if (status) {
652 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
653 goto unlink_int_urb;
654 }
655
656 tport->tp_is_open = 1;
657 ++tdev->td_open_port_count;
658
659 goto up_sem;
660
661 unlink_int_urb:
662 if (tdev->td_open_port_count == 0)
663 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
664 up_sem:
665 up(&tdev->td_open_close_sem);
666 dbg("%s - exit %d", __FUNCTION__, status);
667 return status;
668 }
669
670
671 static void ti_close(struct usb_serial_port *port, struct file *file)
672 {
673 struct ti_device *tdev;
674 struct ti_port *tport;
675 int port_number;
676 int status;
677 int do_up;
678
679 dbg("%s - port %d", __FUNCTION__, port->number);
680
681 tdev = usb_get_serial_data(port->serial);
682 tport = usb_get_serial_port_data(port);
683 if (tdev == NULL || tport == NULL)
684 return;
685
686 tport->tp_is_open = 0;
687
688 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
689
690 usb_kill_urb(port->read_urb);
691 usb_kill_urb(port->write_urb);
692 tport->tp_write_urb_in_use = 0;
693
694 port_number = port->number - port->serial->minor;
695
696 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
697 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
698 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
699 if (status)
700 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
701
702 /* if down is interrupted, continue anyway */
703 do_up = !down_interruptible(&tdev->td_open_close_sem);
704 --tport->tp_tdev->td_open_port_count;
705 if (tport->tp_tdev->td_open_port_count <= 0) {
706 /* last port is closed, shut down interrupt urb */
707 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
708 tport->tp_tdev->td_open_port_count = 0;
709 }
710 if (do_up)
711 up(&tdev->td_open_close_sem);
712
713 dbg("%s - exit", __FUNCTION__);
714 }
715
716
717 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
718 int count)
719 {
720 struct ti_port *tport = usb_get_serial_port_data(port);
721 unsigned long flags;
722
723 dbg("%s - port %d", __FUNCTION__, port->number);
724
725 if (count == 0) {
726 dbg("%s - write request of 0 bytes", __FUNCTION__);
727 return 0;
728 }
729
730 if (tport == NULL || !tport->tp_is_open)
731 return -ENODEV;
732
733 spin_lock_irqsave(&tport->tp_lock, flags);
734 count = ti_buf_put(tport->tp_write_buf, data, count);
735 spin_unlock_irqrestore(&tport->tp_lock, flags);
736
737 ti_send(tport);
738
739 return count;
740 }
741
742
743 static int ti_write_room(struct usb_serial_port *port)
744 {
745 struct ti_port *tport = usb_get_serial_port_data(port);
746 int room = 0;
747 unsigned long flags;
748
749 dbg("%s - port %d", __FUNCTION__, port->number);
750
751 if (tport == NULL)
752 return -ENODEV;
753
754 spin_lock_irqsave(&tport->tp_lock, flags);
755 room = ti_buf_space_avail(tport->tp_write_buf);
756 spin_unlock_irqrestore(&tport->tp_lock, flags);
757
758 dbg("%s - returns %d", __FUNCTION__, room);
759 return room;
760 }
761
762
763 static int ti_chars_in_buffer(struct usb_serial_port *port)
764 {
765 struct ti_port *tport = usb_get_serial_port_data(port);
766 int chars = 0;
767 unsigned long flags;
768
769 dbg("%s - port %d", __FUNCTION__, port->number);
770
771 if (tport == NULL)
772 return -ENODEV;
773
774 spin_lock_irqsave(&tport->tp_lock, flags);
775 chars = ti_buf_data_avail(tport->tp_write_buf);
776 spin_unlock_irqrestore(&tport->tp_lock, flags);
777
778 dbg("%s - returns %d", __FUNCTION__, chars);
779 return chars;
780 }
781
782
783 static void ti_throttle(struct usb_serial_port *port)
784 {
785 struct ti_port *tport = usb_get_serial_port_data(port);
786 struct tty_struct *tty;
787
788 dbg("%s - port %d", __FUNCTION__, port->number);
789
790 if (tport == NULL)
791 return;
792
793 tty = port->tty;
794 if (!tty) {
795 dbg("%s - no tty", __FUNCTION__);
796 return;
797 }
798
799 if (I_IXOFF(tty) || C_CRTSCTS(tty))
800 ti_stop_read(tport, tty);
801
802 }
803
804
805 static void ti_unthrottle(struct usb_serial_port *port)
806 {
807 struct ti_port *tport = usb_get_serial_port_data(port);
808 struct tty_struct *tty;
809 int status;
810
811 dbg("%s - port %d", __FUNCTION__, port->number);
812
813 if (tport == NULL)
814 return;
815
816 tty = port->tty;
817 if (!tty) {
818 dbg("%s - no tty", __FUNCTION__);
819 return;
820 }
821
822 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
823 status = ti_restart_read(tport, tty);
824 if (status)
825 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
826 }
827 }
828
829
830 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
831 unsigned int cmd, unsigned long arg)
832 {
833 struct ti_port *tport = usb_get_serial_port_data(port);
834 struct async_icount cnow;
835 struct async_icount cprev;
836
837 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
838
839 if (tport == NULL)
840 return -ENODEV;
841
842 switch (cmd) {
843 case TIOCGSERIAL:
844 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
845 return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
846 break;
847
848 case TIOCSSERIAL:
849 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
850 return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
851 break;
852
853 case TIOCMIWAIT:
854 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
855 cprev = tport->tp_icount;
856 while (1) {
857 interruptible_sleep_on(&tport->tp_msr_wait);
858 if (signal_pending(current))
859 return -ERESTARTSYS;
860 cnow = tport->tp_icount;
861 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
862 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
863 return -EIO; /* no change => error */
864 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
865 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
866 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
867 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
868 return 0;
869 }
870 cprev = cnow;
871 }
872 break;
873
874 case TIOCGICOUNT:
875 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
876 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
877 return -EFAULT;
878 return 0;
879 }
880
881 return -ENOIOCTLCMD;
882 }
883
884
885 static void ti_set_termios(struct usb_serial_port *port,
886 struct ktermios *old_termios)
887 {
888 struct ti_port *tport = usb_get_serial_port_data(port);
889 struct tty_struct *tty = port->tty;
890 struct ti_uart_config *config;
891 tcflag_t cflag,iflag;
892 int baud;
893 int status;
894 int port_number = port->number - port->serial->minor;
895 unsigned int mcr;
896
897 dbg("%s - port %d", __FUNCTION__, port->number);
898
899 if (!tty || !tty->termios) {
900 dbg("%s - no tty or termios", __FUNCTION__);
901 return;
902 }
903
904 cflag = tty->termios->c_cflag;
905 iflag = tty->termios->c_iflag;
906
907 if (old_termios && cflag == old_termios->c_cflag
908 && iflag == old_termios->c_iflag) {
909 dbg("%s - nothing to change", __FUNCTION__);
910 return;
911 }
912
913 dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
914
915 if (old_termios)
916 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
917
918 if (tport == NULL)
919 return;
920
921 config = kmalloc(sizeof(*config), GFP_KERNEL);
922 if (!config) {
923 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
924 return;
925 }
926
927 config->wFlags = 0;
928
929 /* these flags must be set */
930 config->wFlags |= TI_UART_ENABLE_MS_INTS;
931 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
932 config->bUartMode = (__u8)(tport->tp_uart_mode);
933
934 switch (cflag & CSIZE) {
935 case CS5:
936 config->bDataBits = TI_UART_5_DATA_BITS;
937 break;
938 case CS6:
939 config->bDataBits = TI_UART_6_DATA_BITS;
940 break;
941 case CS7:
942 config->bDataBits = TI_UART_7_DATA_BITS;
943 break;
944 default:
945 case CS8:
946 config->bDataBits = TI_UART_8_DATA_BITS;
947 break;
948 }
949
950 if (cflag & PARENB) {
951 if (cflag & PARODD) {
952 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
953 config->bParity = TI_UART_ODD_PARITY;
954 } else {
955 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
956 config->bParity = TI_UART_EVEN_PARITY;
957 }
958 } else {
959 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
960 config->bParity = TI_UART_NO_PARITY;
961 }
962
963 if (cflag & CSTOPB)
964 config->bStopBits = TI_UART_2_STOP_BITS;
965 else
966 config->bStopBits = TI_UART_1_STOP_BITS;
967
968 if (cflag & CRTSCTS) {
969 /* RTS flow control must be off to drop RTS for baud rate B0 */
970 if ((cflag & CBAUD) != B0)
971 config->wFlags |= TI_UART_ENABLE_RTS_IN;
972 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
973 } else {
974 tty->hw_stopped = 0;
975 ti_restart_read(tport, tty);
976 }
977
978 if (I_IXOFF(tty) || I_IXON(tty)) {
979 config->cXon = START_CHAR(tty);
980 config->cXoff = STOP_CHAR(tty);
981
982 if (I_IXOFF(tty))
983 config->wFlags |= TI_UART_ENABLE_X_IN;
984 else
985 ti_restart_read(tport, tty);
986
987 if (I_IXON(tty))
988 config->wFlags |= TI_UART_ENABLE_X_OUT;
989 }
990
991 baud = tty_get_baud_rate(tty);
992 if (!baud) 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 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
999 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
1000
1001 cpu_to_be16s(&config->wBaudRate);
1002 cpu_to_be16s(&config->wFlags);
1003
1004 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1005 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1006 sizeof(*config));
1007 if (status)
1008 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1009
1010 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1011 mcr = tport->tp_shadow_mcr;
1012 /* if baud rate is B0, clear RTS and DTR */
1013 if ((cflag & CBAUD) == B0)
1014 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1015 status = ti_set_mcr(tport, mcr);
1016 if (status)
1017 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1018
1019 kfree(config);
1020 }
1021
1022
1023 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1024 {
1025 struct ti_port *tport = usb_get_serial_port_data(port);
1026 unsigned int result;
1027 unsigned int msr;
1028 unsigned int mcr;
1029
1030 dbg("%s - port %d", __FUNCTION__, port->number);
1031
1032 if (tport == NULL)
1033 return -ENODEV;
1034
1035 msr = tport->tp_msr;
1036 mcr = tport->tp_shadow_mcr;
1037
1038 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1039 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1040 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1041 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1042 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1043 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1044 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1045
1046 dbg("%s - 0x%04X", __FUNCTION__, result);
1047
1048 return result;
1049 }
1050
1051
1052 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1053 unsigned int set, unsigned int clear)
1054 {
1055 struct ti_port *tport = usb_get_serial_port_data(port);
1056 unsigned int mcr;
1057
1058 dbg("%s - port %d", __FUNCTION__, port->number);
1059
1060 if (tport == NULL)
1061 return -ENODEV;
1062
1063 mcr = tport->tp_shadow_mcr;
1064
1065 if (set & TIOCM_RTS)
1066 mcr |= TI_MCR_RTS;
1067 if (set & TIOCM_DTR)
1068 mcr |= TI_MCR_DTR;
1069 if (set & TIOCM_LOOP)
1070 mcr |= TI_MCR_LOOP;
1071
1072 if (clear & TIOCM_RTS)
1073 mcr &= ~TI_MCR_RTS;
1074 if (clear & TIOCM_DTR)
1075 mcr &= ~TI_MCR_DTR;
1076 if (clear & TIOCM_LOOP)
1077 mcr &= ~TI_MCR_LOOP;
1078
1079 return ti_set_mcr(tport, mcr);
1080 }
1081
1082
1083 static void ti_break(struct usb_serial_port *port, int break_state)
1084 {
1085 struct ti_port *tport = usb_get_serial_port_data(port);
1086 int status;
1087
1088 dbg("%s - state = %d", __FUNCTION__, break_state);
1089
1090 if (tport == NULL)
1091 return;
1092
1093 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1094
1095 status = ti_write_byte(tport->tp_tdev,
1096 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1097 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1098
1099 if (status)
1100 dbg("%s - error setting break, %d", __FUNCTION__, status);
1101 }
1102
1103
1104 static void ti_interrupt_callback(struct urb *urb)
1105 {
1106 struct ti_device *tdev = (struct ti_device *)urb->context;
1107 struct usb_serial_port *port;
1108 struct usb_serial *serial = tdev->td_serial;
1109 struct ti_port *tport;
1110 struct device *dev = &urb->dev->dev;
1111 unsigned char *data = urb->transfer_buffer;
1112 int length = urb->actual_length;
1113 int port_number;
1114 int function;
1115 int status;
1116 __u8 msr;
1117
1118 dbg("%s", __FUNCTION__);
1119
1120 switch (urb->status) {
1121 case 0:
1122 break;
1123 case -ECONNRESET:
1124 case -ENOENT:
1125 case -ESHUTDOWN:
1126 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1127 tdev->td_urb_error = 1;
1128 return;
1129 default:
1130 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1131 tdev->td_urb_error = 1;
1132 goto exit;
1133 }
1134
1135 if (length != 2) {
1136 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1137 goto exit;
1138 }
1139
1140 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1141 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1142 goto exit;
1143 }
1144
1145 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1146 function = TI_GET_FUNC_FROM_CODE(data[0]);
1147
1148 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1149
1150 if (port_number >= serial->num_ports) {
1151 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1152 goto exit;
1153 }
1154
1155 port = serial->port[port_number];
1156
1157 tport = usb_get_serial_port_data(port);
1158 if (!tport)
1159 goto exit;
1160
1161 switch (function) {
1162 case TI_CODE_DATA_ERROR:
1163 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1164 break;
1165
1166 case TI_CODE_MODEM_STATUS:
1167 msr = data[1];
1168 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1169 ti_handle_new_msr(tport, msr);
1170 break;
1171
1172 default:
1173 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1174 break;
1175 }
1176
1177 exit:
1178 status = usb_submit_urb(urb, GFP_ATOMIC);
1179 if (status)
1180 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status);
1181 }
1182
1183
1184 static void ti_bulk_in_callback(struct urb *urb)
1185 {
1186 struct ti_port *tport = (struct ti_port *)urb->context;
1187 struct usb_serial_port *port = tport->tp_port;
1188 struct device *dev = &urb->dev->dev;
1189 int status = 0;
1190
1191 dbg("%s", __FUNCTION__);
1192
1193 switch (urb->status) {
1194 case 0:
1195 break;
1196 case -ECONNRESET:
1197 case -ENOENT:
1198 case -ESHUTDOWN:
1199 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1200 tport->tp_tdev->td_urb_error = 1;
1201 wake_up_interruptible(&tport->tp_write_wait);
1202 return;
1203 default:
1204 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status );
1205 tport->tp_tdev->td_urb_error = 1;
1206 wake_up_interruptible(&tport->tp_write_wait);
1207 }
1208
1209 if (urb->status == -EPIPE)
1210 goto exit;
1211
1212 if (urb->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 status = 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 (status)
1243 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status);
1244 }
1245
1246
1247 static void ti_bulk_out_callback(struct urb *urb)
1248 {
1249 struct ti_port *tport = (struct ti_port *)urb->context;
1250 struct usb_serial_port *port = tport->tp_port;
1251 struct device *dev = &urb->dev->dev;
1252
1253 dbg("%s - port %d", __FUNCTION__, port->number);
1254
1255 tport->tp_write_urb_in_use = 0;
1256
1257 switch (urb->status) {
1258 case 0:
1259 break;
1260 case -ECONNRESET:
1261 case -ENOENT:
1262 case -ESHUTDOWN:
1263 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1264 tport->tp_tdev->td_urb_error = 1;
1265 wake_up_interruptible(&tport->tp_write_wait);
1266 return;
1267 default:
1268 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1269 tport->tp_tdev->td_urb_error = 1;
1270 wake_up_interruptible(&tport->tp_write_wait);
1271 }
1272
1273 /* send any buffered data */
1274 ti_send(tport);
1275 }
1276
1277
1278 static void ti_recv(struct device *dev, struct tty_struct *tty,
1279 unsigned char *data, int length)
1280 {
1281 int cnt;
1282
1283 do {
1284 cnt = tty_buffer_request_room(tty, length);
1285 if (cnt < length) {
1286 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1287 if(cnt == 0)
1288 break;
1289 }
1290 tty_insert_flip_string(tty, data, cnt);
1291 tty_flip_buffer_push(tty);
1292 data += cnt;
1293 length -= cnt;
1294 } while (length > 0);
1295
1296 }
1297
1298
1299 static void ti_send(struct ti_port *tport)
1300 {
1301 int count, result;
1302 struct usb_serial_port *port = tport->tp_port;
1303 struct tty_struct *tty = port->tty;
1304 unsigned long flags;
1305
1306
1307 dbg("%s - port %d", __FUNCTION__, port->number);
1308
1309 spin_lock_irqsave(&tport->tp_lock, flags);
1310
1311 if (tport->tp_write_urb_in_use) {
1312 spin_unlock_irqrestore(&tport->tp_lock, flags);
1313 return;
1314 }
1315
1316 count = ti_buf_get(tport->tp_write_buf,
1317 port->write_urb->transfer_buffer,
1318 port->bulk_out_size);
1319
1320 if (count == 0) {
1321 spin_unlock_irqrestore(&tport->tp_lock, flags);
1322 return;
1323 }
1324
1325 tport->tp_write_urb_in_use = 1;
1326
1327 spin_unlock_irqrestore(&tport->tp_lock, flags);
1328
1329 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1330
1331 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1332 usb_sndbulkpipe(port->serial->dev,
1333 port->bulk_out_endpointAddress),
1334 port->write_urb->transfer_buffer, count,
1335 ti_bulk_out_callback, tport);
1336
1337 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1338 if (result) {
1339 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1340 tport->tp_write_urb_in_use = 0;
1341 /* TODO: reschedule ti_send */
1342 } else {
1343 spin_lock_irqsave(&tport->tp_lock, flags);
1344 tport->tp_icount.tx += count;
1345 spin_unlock_irqrestore(&tport->tp_lock, flags);
1346 }
1347
1348 /* more room in the buffer for new writes, wakeup */
1349 if (tty)
1350 tty_wakeup(tty);
1351 wake_up_interruptible(&tport->tp_write_wait);
1352 }
1353
1354
1355 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1356 {
1357 int status;
1358
1359 status = ti_write_byte(tport->tp_tdev,
1360 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1361 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1362
1363 if (!status)
1364 tport->tp_shadow_mcr = mcr;
1365
1366 return status;
1367 }
1368
1369
1370 static int ti_get_lsr(struct ti_port *tport)
1371 {
1372 int size,status;
1373 struct ti_device *tdev = tport->tp_tdev;
1374 struct usb_serial_port *port = tport->tp_port;
1375 int port_number = port->number - port->serial->minor;
1376 struct ti_port_status *data;
1377
1378 dbg("%s - port %d", __FUNCTION__, port->number);
1379
1380 size = sizeof(struct ti_port_status);
1381 data = kmalloc(size, GFP_KERNEL);
1382 if (!data) {
1383 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1384 return -ENOMEM;
1385 }
1386
1387 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1388 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1389 if (status) {
1390 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1391 goto free_data;
1392 }
1393
1394 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1395
1396 tport->tp_lsr = data->bLSR;
1397
1398 free_data:
1399 kfree(data);
1400 return status;
1401 }
1402
1403
1404 static int ti_get_serial_info(struct ti_port *tport,
1405 struct serial_struct __user *ret_arg)
1406 {
1407 struct usb_serial_port *port = tport->tp_port;
1408 struct serial_struct ret_serial;
1409
1410 if (!ret_arg)
1411 return -EFAULT;
1412
1413 memset(&ret_serial, 0, sizeof(ret_serial));
1414
1415 ret_serial.type = PORT_16550A;
1416 ret_serial.line = port->serial->minor;
1417 ret_serial.port = port->number - port->serial->minor;
1418 ret_serial.flags = tport->tp_flags;
1419 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1420 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1421 ret_serial.closing_wait = tport->tp_closing_wait;
1422
1423 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1424 return -EFAULT;
1425
1426 return 0;
1427 }
1428
1429
1430 static int ti_set_serial_info(struct ti_port *tport,
1431 struct serial_struct __user *new_arg)
1432 {
1433 struct usb_serial_port *port = tport->tp_port;
1434 struct serial_struct new_serial;
1435
1436 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1437 return -EFAULT;
1438
1439 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1440 if (port->tty)
1441 port->tty->low_latency =
1442 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1443 tport->tp_closing_wait = new_serial.closing_wait;
1444
1445 return 0;
1446 }
1447
1448
1449 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1450 {
1451 struct async_icount *icount;
1452 struct tty_struct *tty;
1453 unsigned long flags;
1454
1455 dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1456
1457 if (msr & TI_MSR_DELTA_MASK) {
1458 spin_lock_irqsave(&tport->tp_lock, flags);
1459 icount = &tport->tp_icount;
1460 if (msr & TI_MSR_DELTA_CTS)
1461 icount->cts++;
1462 if (msr & TI_MSR_DELTA_DSR)
1463 icount->dsr++;
1464 if (msr & TI_MSR_DELTA_CD)
1465 icount->dcd++;
1466 if (msr & TI_MSR_DELTA_RI)
1467 icount->rng++;
1468 wake_up_interruptible(&tport->tp_msr_wait);
1469 spin_unlock_irqrestore(&tport->tp_lock, flags);
1470 }
1471
1472 tport->tp_msr = msr & TI_MSR_MASK;
1473
1474 /* handle CTS flow control */
1475 tty = tport->tp_port->tty;
1476 if (tty && C_CRTSCTS(tty)) {
1477 if (msr & TI_MSR_CTS) {
1478 tty->hw_stopped = 0;
1479 tty_wakeup(tty);
1480 } else {
1481 tty->hw_stopped = 1;
1482 }
1483 }
1484 }
1485
1486
1487 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1488 {
1489 struct ti_device *tdev = tport->tp_tdev;
1490 struct usb_serial_port *port = tport->tp_port;
1491 wait_queue_t wait;
1492 unsigned long flags;
1493
1494 dbg("%s - port %d", __FUNCTION__, port->number);
1495
1496 spin_lock_irqsave(&tport->tp_lock, flags);
1497
1498 /* wait for data to drain from the buffer */
1499 tdev->td_urb_error = 0;
1500 init_waitqueue_entry(&wait, current);
1501 add_wait_queue(&tport->tp_write_wait, &wait);
1502 for (;;) {
1503 set_current_state(TASK_INTERRUPTIBLE);
1504 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1505 || timeout == 0 || signal_pending(current)
1506 || tdev->td_urb_error
1507 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
1508 break;
1509 spin_unlock_irqrestore(&tport->tp_lock, flags);
1510 timeout = schedule_timeout(timeout);
1511 spin_lock_irqsave(&tport->tp_lock, flags);
1512 }
1513 set_current_state(TASK_RUNNING);
1514 remove_wait_queue(&tport->tp_write_wait, &wait);
1515
1516 /* flush any remaining data in the buffer */
1517 if (flush)
1518 ti_buf_clear(tport->tp_write_buf);
1519
1520 spin_unlock_irqrestore(&tport->tp_lock, flags);
1521
1522 /* wait for data to drain from the device */
1523 /* wait for empty tx register, plus 20 ms */
1524 timeout += jiffies;
1525 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1526 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1527 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1528 && usb_get_intfdata(port->serial->interface)) { /* not disconnected */
1529 if (ti_get_lsr(tport))
1530 break;
1531 msleep_interruptible(20);
1532 }
1533 }
1534
1535
1536 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1537 {
1538 unsigned long flags;
1539
1540 spin_lock_irqsave(&tport->tp_lock, flags);
1541
1542 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1543 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1544
1545 spin_unlock_irqrestore(&tport->tp_lock, flags);
1546 }
1547
1548
1549 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1550 {
1551 struct urb *urb;
1552 int status = 0;
1553 unsigned long flags;
1554
1555 spin_lock_irqsave(&tport->tp_lock, flags);
1556
1557 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1558 urb = tport->tp_port->read_urb;
1559 urb->complete = ti_bulk_in_callback;
1560 urb->context = tport;
1561 urb->dev = tport->tp_port->serial->dev;
1562 status = usb_submit_urb(urb, GFP_KERNEL);
1563 }
1564 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1565
1566 spin_unlock_irqrestore(&tport->tp_lock, flags);
1567
1568 return status;
1569 }
1570
1571
1572 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1573 __u16 moduleid, __u16 value, __u8 *data, int size)
1574 {
1575 int status;
1576
1577 status = usb_control_msg(tdev->td_serial->dev,
1578 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1579 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1580 value, moduleid, data, size, 1000);
1581
1582 if (status == size)
1583 status = 0;
1584
1585 if (status > 0)
1586 status = -ECOMM;
1587
1588 return status;
1589 }
1590
1591
1592 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1593 __u16 moduleid, __u16 value, __u8 *data, int size)
1594 {
1595 int status;
1596
1597 status = usb_control_msg(tdev->td_serial->dev,
1598 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1599 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1600 value, moduleid, data, size, 1000);
1601
1602 if (status == size)
1603 status = 0;
1604
1605 if (status > 0)
1606 status = -ECOMM;
1607
1608 return status;
1609 }
1610
1611
1612 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1613 __u8 mask, __u8 byte)
1614 {
1615 int status;
1616 unsigned int size;
1617 struct ti_write_data_bytes *data;
1618 struct device *dev = &tdev->td_serial->dev->dev;
1619
1620 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1621
1622 size = sizeof(struct ti_write_data_bytes) + 2;
1623 data = kmalloc(size, GFP_KERNEL);
1624 if (!data) {
1625 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1626 return -ENOMEM;
1627 }
1628
1629 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1630 data->bDataType = TI_RW_DATA_BYTE;
1631 data->bDataCounter = 1;
1632 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1633 data->wBaseAddrLo = cpu_to_be16(addr);
1634 data->bData[0] = mask;
1635 data->bData[1] = byte;
1636
1637 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1638 (__u8 *)data, size);
1639
1640 if (status < 0)
1641 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1642
1643 kfree(data);
1644
1645 return status;
1646 }
1647
1648
1649 static int ti_download_firmware(struct ti_device *tdev,
1650 unsigned char *firmware, unsigned int firmware_size)
1651 {
1652 int status = 0;
1653 int buffer_size;
1654 int pos;
1655 int len;
1656 int done;
1657 __u8 cs = 0;
1658 __u8 *buffer;
1659 struct usb_device *dev = tdev->td_serial->dev;
1660 struct ti_firmware_header *header;
1661 unsigned int pipe = usb_sndbulkpipe(dev,
1662 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1663
1664
1665 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1666 buffer = kmalloc(buffer_size, GFP_KERNEL);
1667 if (!buffer) {
1668 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1669 return -ENOMEM;
1670 }
1671
1672 memcpy(buffer, firmware, firmware_size);
1673 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1674
1675 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1676 cs = (__u8)(cs + buffer[pos]);
1677
1678 header = (struct ti_firmware_header *)buffer;
1679 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1680 header->bCheckSum = cs;
1681
1682 dbg("%s - downloading firmware", __FUNCTION__);
1683 for (pos = 0; pos < buffer_size; pos += done) {
1684 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1685 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1686 if (status)
1687 break;
1688 }
1689
1690 kfree(buffer);
1691
1692 if (status) {
1693 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1694 return status;
1695 }
1696
1697 dbg("%s - download successful", __FUNCTION__);
1698
1699 return 0;
1700 }
1701
1702
1703 /* Circular Buffer Functions */
1704
1705 /*
1706 * ti_buf_alloc
1707 *
1708 * Allocate a circular buffer and all associated memory.
1709 */
1710
1711 static struct circ_buf *ti_buf_alloc(void)
1712 {
1713 struct circ_buf *cb;
1714
1715 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1716 if (cb == NULL)
1717 return NULL;
1718
1719 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1720 if (cb->buf == NULL) {
1721 kfree(cb);
1722 return NULL;
1723 }
1724
1725 ti_buf_clear(cb);
1726
1727 return cb;
1728 }
1729
1730
1731 /*
1732 * ti_buf_free
1733 *
1734 * Free the buffer and all associated memory.
1735 */
1736
1737 static void ti_buf_free(struct circ_buf *cb)
1738 {
1739 kfree(cb->buf);
1740 kfree(cb);
1741 }
1742
1743
1744 /*
1745 * ti_buf_clear
1746 *
1747 * Clear out all data in the circular buffer.
1748 */
1749
1750 static void ti_buf_clear(struct circ_buf *cb)
1751 {
1752 cb->head = cb->tail = 0;
1753 }
1754
1755
1756 /*
1757 * ti_buf_data_avail
1758 *
1759 * Return the number of bytes of data available in the circular
1760 * buffer.
1761 */
1762
1763 static int ti_buf_data_avail(struct circ_buf *cb)
1764 {
1765 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1766 }
1767
1768
1769 /*
1770 * ti_buf_space_avail
1771 *
1772 * Return the number of bytes of space available in the circular
1773 * buffer.
1774 */
1775
1776 static int ti_buf_space_avail(struct circ_buf *cb)
1777 {
1778 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1779 }
1780
1781
1782 /*
1783 * ti_buf_put
1784 *
1785 * Copy data data from a user buffer and put it into the circular buffer.
1786 * Restrict to the amount of space available.
1787 *
1788 * Return the number of bytes copied.
1789 */
1790
1791 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1792 {
1793 int c, ret = 0;
1794
1795 while (1) {
1796 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1797 if (count < c)
1798 c = count;
1799 if (c <= 0)
1800 break;
1801 memcpy(cb->buf + cb->head, buf, c);
1802 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1803 buf += c;
1804 count -= c;
1805 ret += c;
1806 }
1807
1808 return ret;
1809 }
1810
1811
1812 /*
1813 * ti_buf_get
1814 *
1815 * Get data from the circular buffer and copy to the given buffer.
1816 * Restrict to the amount of data available.
1817 *
1818 * Return the number of bytes copied.
1819 */
1820
1821 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1822 {
1823 int c, ret = 0;
1824
1825 while (1) {
1826 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1827 if (count < c)
1828 c = count;
1829 if (c <= 0)
1830 break;
1831 memcpy(buf, cb->buf + cb->tail, c);
1832 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1833 buf += c;
1834 count -= c;
1835 ret += c;
1836 }
1837
1838 return ret;
1839 }
kernel-based virtual machine