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USB: omninet: fix write_room
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob18de038a03ccb149fdfc763e56c8e1e172fe0a97
1 /* vi: ts=8 sw=8
2 *
3 * TI 3410/5052 USB Serial Driver
4 *
5 * Copyright (C) 2004 Texas Instruments
6 *
7 * This driver is based on the Linux io_ti driver, which is
8 * Copyright (C) 2000-2002 Inside Out Networks
9 * Copyright (C) 2001-2002 Greg Kroah-Hartman
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * For questions or problems with this driver, contact Texas Instruments
17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18 * Peter Berger <pberger@brimson.com>.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/firmware.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/circ_buf.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "ti_usb_3410_5052.h"
40
41 /* Defines */
42
43 #define TI_DRIVER_VERSION "v0.9"
44 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
46
47 #define TI_FIRMWARE_BUF_SIZE 16284
48
49 #define TI_WRITE_BUF_SIZE 1024
50
51 #define TI_TRANSFER_TIMEOUT 2
52
53 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
54
55 /* supported setserial flags */
56 #define TI_SET_SERIAL_FLAGS 0
57
58 /* read urb states */
59 #define TI_READ_URB_RUNNING 0
60 #define TI_READ_URB_STOPPING 1
61 #define TI_READ_URB_STOPPED 2
62
63 #define TI_EXTRA_VID_PID_COUNT 5
64
65
66 /* Structures */
67
68 struct ti_port {
69 int tp_is_open;
70 __u8 tp_msr;
71 __u8 tp_lsr;
72 __u8 tp_shadow_mcr;
73 __u8 tp_uart_mode; /* 232 or 485 modes */
74 unsigned int tp_uart_base_addr;
75 int tp_flags;
76 int tp_closing_wait;/* in .01 secs */
77 struct async_icount tp_icount;
78 wait_queue_head_t tp_msr_wait; /* wait for msr change */
79 wait_queue_head_t tp_write_wait;
80 struct ti_device *tp_tdev;
81 struct usb_serial_port *tp_port;
82 spinlock_t tp_lock;
83 int tp_read_urb_state;
84 int tp_write_urb_in_use;
85 struct circ_buf *tp_write_buf;
86 };
87
88 struct ti_device {
89 struct mutex td_open_close_lock;
90 int td_open_port_count;
91 struct usb_serial *td_serial;
92 int td_is_3410;
93 int td_urb_error;
94 };
95
96
97 /* Function Declarations */
98
99 static int ti_startup(struct usb_serial *serial);
100 static void ti_release(struct usb_serial *serial);
101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
102 static void ti_close(struct usb_serial_port *port);
103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
104 const unsigned char *data, int count);
105 static int ti_write_room(struct tty_struct *tty);
106 static int ti_chars_in_buffer(struct tty_struct *tty);
107 static void ti_throttle(struct tty_struct *tty);
108 static void ti_unthrottle(struct tty_struct *tty);
109 static int ti_ioctl(struct tty_struct *tty, struct file *file,
110 unsigned int cmd, unsigned long arg);
111 static void ti_set_termios(struct tty_struct *tty,
112 struct usb_serial_port *port, struct ktermios *old_termios);
113 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
114 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
115 unsigned int set, unsigned int clear);
116 static void ti_break(struct tty_struct *tty, int break_state);
117 static void ti_interrupt_callback(struct urb *urb);
118 static void ti_bulk_in_callback(struct urb *urb);
119 static void ti_bulk_out_callback(struct urb *urb);
120
121 static void ti_recv(struct device *dev, struct tty_struct *tty,
122 unsigned char *data, int length);
123 static void ti_send(struct ti_port *tport);
124 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
125 static int ti_get_lsr(struct ti_port *tport);
126 static int ti_get_serial_info(struct ti_port *tport,
127 struct serial_struct __user *ret_arg);
128 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
129 struct serial_struct __user *new_arg);
130 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
131
132 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
133
134 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
135 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
136
137 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
138 __u16 moduleid, __u16 value, __u8 *data, int size);
139 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
140 __u16 moduleid, __u16 value, __u8 *data, int size);
141
142 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
143 __u8 mask, __u8 byte);
144
145 static int ti_download_firmware(struct ti_device *tdev);
146
147 /* circular buffer */
148 static struct circ_buf *ti_buf_alloc(void);
149 static void ti_buf_free(struct circ_buf *cb);
150 static void ti_buf_clear(struct circ_buf *cb);
151 static int ti_buf_data_avail(struct circ_buf *cb);
152 static int ti_buf_space_avail(struct circ_buf *cb);
153 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
154 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
155
156
157 /* Data */
158
159 /* module parameters */
160 static int debug;
161 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
162 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
163 static unsigned int vendor_3410_count;
164 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
165 static unsigned int product_3410_count;
166 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
167 static unsigned int vendor_5052_count;
168 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
169 static unsigned int product_5052_count;
170
171 /* supported devices */
172 /* the array dimension is the number of default entries plus */
173 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
174 /* null entry */
175 static struct usb_device_id ti_id_table_3410[10+TI_EXTRA_VID_PID_COUNT+1] = {
176 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
177 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
178 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
179 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
180 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
181 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
182 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
183 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
184 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
185 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
186 };
187
188 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
189 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
190 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
191 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
192 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
193 };
194
195 static struct usb_device_id ti_id_table_combined[14+2*TI_EXTRA_VID_PID_COUNT+1] = {
196 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
197 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
198 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
199 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
200 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
202 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
203 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
204 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
205 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
206 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
207 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
208 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
209 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
210 { }
211 };
212
213 static struct usb_driver ti_usb_driver = {
214 .name = "ti_usb_3410_5052",
215 .probe = usb_serial_probe,
216 .disconnect = usb_serial_disconnect,
217 .id_table = ti_id_table_combined,
218 .no_dynamic_id = 1,
219 };
220
221 static struct usb_serial_driver ti_1port_device = {
222 .driver = {
223 .owner = THIS_MODULE,
224 .name = "ti_usb_3410_5052_1",
225 },
226 .description = "TI USB 3410 1 port adapter",
227 .usb_driver = &ti_usb_driver,
228 .id_table = ti_id_table_3410,
229 .num_ports = 1,
230 .attach = ti_startup,
231 .release = ti_release,
232 .open = ti_open,
233 .close = ti_close,
234 .write = ti_write,
235 .write_room = ti_write_room,
236 .chars_in_buffer = ti_chars_in_buffer,
237 .throttle = ti_throttle,
238 .unthrottle = ti_unthrottle,
239 .ioctl = ti_ioctl,
240 .set_termios = ti_set_termios,
241 .tiocmget = ti_tiocmget,
242 .tiocmset = ti_tiocmset,
243 .break_ctl = ti_break,
244 .read_int_callback = ti_interrupt_callback,
245 .read_bulk_callback = ti_bulk_in_callback,
246 .write_bulk_callback = ti_bulk_out_callback,
247 };
248
249 static struct usb_serial_driver ti_2port_device = {
250 .driver = {
251 .owner = THIS_MODULE,
252 .name = "ti_usb_3410_5052_2",
253 },
254 .description = "TI USB 5052 2 port adapter",
255 .usb_driver = &ti_usb_driver,
256 .id_table = ti_id_table_5052,
257 .num_ports = 2,
258 .attach = ti_startup,
259 .release = ti_release,
260 .open = ti_open,
261 .close = ti_close,
262 .write = ti_write,
263 .write_room = ti_write_room,
264 .chars_in_buffer = ti_chars_in_buffer,
265 .throttle = ti_throttle,
266 .unthrottle = ti_unthrottle,
267 .ioctl = ti_ioctl,
268 .set_termios = ti_set_termios,
269 .tiocmget = ti_tiocmget,
270 .tiocmset = ti_tiocmset,
271 .break_ctl = ti_break,
272 .read_int_callback = ti_interrupt_callback,
273 .read_bulk_callback = ti_bulk_in_callback,
274 .write_bulk_callback = ti_bulk_out_callback,
275 };
276
277
278 /* Module */
279
280 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
281 MODULE_DESCRIPTION(TI_DRIVER_DESC);
282 MODULE_VERSION(TI_DRIVER_VERSION);
283 MODULE_LICENSE("GPL");
284
285 MODULE_FIRMWARE("ti_3410.fw");
286 MODULE_FIRMWARE("ti_5052.fw");
287 MODULE_FIRMWARE("mts_cdma.fw");
288 MODULE_FIRMWARE("mts_gsm.fw");
289 MODULE_FIRMWARE("mts_edge.fw");
290
291 module_param(debug, bool, S_IRUGO | S_IWUSR);
292 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
293
294 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
295 MODULE_PARM_DESC(closing_wait,
296 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
297
298 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
299 MODULE_PARM_DESC(vendor_3410,
300 "Vendor ids for 3410 based devices, 1-5 short integers");
301 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
302 MODULE_PARM_DESC(product_3410,
303 "Product ids for 3410 based devices, 1-5 short integers");
304 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
305 MODULE_PARM_DESC(vendor_5052,
306 "Vendor ids for 5052 based devices, 1-5 short integers");
307 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
308 MODULE_PARM_DESC(product_5052,
309 "Product ids for 5052 based devices, 1-5 short integers");
310
311 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
312
313
314 /* Functions */
315
316 static int __init ti_init(void)
317 {
318 int i, j, c;
319 int ret;
320
321 /* insert extra vendor and product ids */
322 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
323 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
324 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
325 ti_id_table_3410[j].idVendor = vendor_3410[i];
326 ti_id_table_3410[j].idProduct = product_3410[i];
327 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
328 ti_id_table_combined[c].idVendor = vendor_3410[i];
329 ti_id_table_combined[c].idProduct = product_3410[i];
330 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
331 }
332 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
333 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
334 ti_id_table_5052[j].idVendor = vendor_5052[i];
335 ti_id_table_5052[j].idProduct = product_5052[i];
336 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
337 ti_id_table_combined[c].idVendor = vendor_5052[i];
338 ti_id_table_combined[c].idProduct = product_5052[i];
339 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
340 }
341
342 ret = usb_serial_register(&ti_1port_device);
343 if (ret)
344 goto failed_1port;
345 ret = usb_serial_register(&ti_2port_device);
346 if (ret)
347 goto failed_2port;
348
349 ret = usb_register(&ti_usb_driver);
350 if (ret)
351 goto failed_usb;
352
353 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
354 TI_DRIVER_DESC "\n");
355
356 return 0;
357
358 failed_usb:
359 usb_serial_deregister(&ti_2port_device);
360 failed_2port:
361 usb_serial_deregister(&ti_1port_device);
362 failed_1port:
363 return ret;
364 }
365
366
367 static void __exit ti_exit(void)
368 {
369 usb_deregister(&ti_usb_driver);
370 usb_serial_deregister(&ti_1port_device);
371 usb_serial_deregister(&ti_2port_device);
372 }
373
374
375 module_init(ti_init);
376 module_exit(ti_exit);
377
378
379 static int ti_startup(struct usb_serial *serial)
380 {
381 struct ti_device *tdev;
382 struct ti_port *tport;
383 struct usb_device *dev = serial->dev;
384 int status;
385 int i;
386
387
388 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
389 __func__, le16_to_cpu(dev->descriptor.idProduct),
390 dev->descriptor.bNumConfigurations,
391 dev->actconfig->desc.bConfigurationValue);
392
393 /* create device structure */
394 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
395 if (tdev == NULL) {
396 dev_err(&dev->dev, "%s - out of memory\n", __func__);
397 return -ENOMEM;
398 }
399 mutex_init(&tdev->td_open_close_lock);
400 tdev->td_serial = serial;
401 usb_set_serial_data(serial, tdev);
402
403 /* determine device type */
404 if (usb_match_id(serial->interface, ti_id_table_3410))
405 tdev->td_is_3410 = 1;
406 dbg("%s - device type is %s", __func__,
407 tdev->td_is_3410 ? "3410" : "5052");
408
409 /* if we have only 1 configuration, download firmware */
410 if (dev->descriptor.bNumConfigurations == 1) {
411 if ((status = ti_download_firmware(tdev)) != 0)
412 goto free_tdev;
413
414 /* 3410 must be reset, 5052 resets itself */
415 if (tdev->td_is_3410) {
416 msleep_interruptible(100);
417 usb_reset_device(dev);
418 }
419
420 status = -ENODEV;
421 goto free_tdev;
422 }
423
424 /* the second configuration must be set */
425 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
426 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
427 status = status ? status : -ENODEV;
428 goto free_tdev;
429 }
430
431 /* set up port structures */
432 for (i = 0; i < serial->num_ports; ++i) {
433 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
434 if (tport == NULL) {
435 dev_err(&dev->dev, "%s - out of memory\n", __func__);
436 status = -ENOMEM;
437 goto free_tports;
438 }
439 spin_lock_init(&tport->tp_lock);
440 tport->tp_uart_base_addr = (i == 0 ?
441 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
442 tport->tp_closing_wait = closing_wait;
443 init_waitqueue_head(&tport->tp_msr_wait);
444 init_waitqueue_head(&tport->tp_write_wait);
445 tport->tp_write_buf = ti_buf_alloc();
446 if (tport->tp_write_buf == NULL) {
447 dev_err(&dev->dev, "%s - out of memory\n", __func__);
448 kfree(tport);
449 status = -ENOMEM;
450 goto free_tports;
451 }
452 tport->tp_port = serial->port[i];
453 tport->tp_tdev = tdev;
454 usb_set_serial_port_data(serial->port[i], tport);
455 tport->tp_uart_mode = 0; /* default is RS232 */
456 }
457
458 return 0;
459
460 free_tports:
461 for (--i; i >= 0; --i) {
462 tport = usb_get_serial_port_data(serial->port[i]);
463 ti_buf_free(tport->tp_write_buf);
464 kfree(tport);
465 usb_set_serial_port_data(serial->port[i], NULL);
466 }
467 free_tdev:
468 kfree(tdev);
469 usb_set_serial_data(serial, NULL);
470 return status;
471 }
472
473
474 static void ti_release(struct usb_serial *serial)
475 {
476 int i;
477 struct ti_device *tdev = usb_get_serial_data(serial);
478 struct ti_port *tport;
479
480 dbg("%s", __func__);
481
482 for (i = 0; i < serial->num_ports; ++i) {
483 tport = usb_get_serial_port_data(serial->port[i]);
484 if (tport) {
485 ti_buf_free(tport->tp_write_buf);
486 kfree(tport);
487 }
488 }
489
490 kfree(tdev);
491 }
492
493
494 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
495 {
496 struct ti_port *tport = usb_get_serial_port_data(port);
497 struct ti_device *tdev;
498 struct usb_device *dev;
499 struct urb *urb;
500 int port_number;
501 int status;
502 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
503 TI_PIPE_TIMEOUT_ENABLE |
504 (TI_TRANSFER_TIMEOUT << 2));
505
506 dbg("%s - port %d", __func__, port->number);
507
508 if (tport == NULL)
509 return -ENODEV;
510
511 dev = port->serial->dev;
512 tdev = tport->tp_tdev;
513
514 /* only one open on any port on a device at a time */
515 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
516 return -ERESTARTSYS;
517
518 port_number = port->number - port->serial->minor;
519
520 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
521
522 tport->tp_msr = 0;
523 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
524
525 /* start interrupt urb the first time a port is opened on this device */
526 if (tdev->td_open_port_count == 0) {
527 dbg("%s - start interrupt in urb", __func__);
528 urb = tdev->td_serial->port[0]->interrupt_in_urb;
529 if (!urb) {
530 dev_err(&port->dev, "%s - no interrupt urb\n",
531 __func__);
532 status = -EINVAL;
533 goto release_lock;
534 }
535 urb->complete = ti_interrupt_callback;
536 urb->context = tdev;
537 urb->dev = dev;
538 status = usb_submit_urb(urb, GFP_KERNEL);
539 if (status) {
540 dev_err(&port->dev,
541 "%s - submit interrupt urb failed, %d\n",
542 __func__, status);
543 goto release_lock;
544 }
545 }
546
547 if (tty)
548 ti_set_termios(tty, port, tty->termios);
549
550 dbg("%s - sending TI_OPEN_PORT", __func__);
551 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
552 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
553 if (status) {
554 dev_err(&port->dev, "%s - cannot send open command, %d\n",
555 __func__, status);
556 goto unlink_int_urb;
557 }
558
559 dbg("%s - sending TI_START_PORT", __func__);
560 status = ti_command_out_sync(tdev, TI_START_PORT,
561 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
562 if (status) {
563 dev_err(&port->dev, "%s - cannot send start command, %d\n",
564 __func__, status);
565 goto unlink_int_urb;
566 }
567
568 dbg("%s - sending TI_PURGE_PORT", __func__);
569 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
570 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
571 if (status) {
572 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
573 __func__, status);
574 goto unlink_int_urb;
575 }
576 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
577 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
578 if (status) {
579 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
580 __func__, status);
581 goto unlink_int_urb;
582 }
583
584 /* reset the data toggle on the bulk endpoints to work around bug in
585 * host controllers where things get out of sync some times */
586 usb_clear_halt(dev, port->write_urb->pipe);
587 usb_clear_halt(dev, port->read_urb->pipe);
588
589 if (tty)
590 ti_set_termios(tty, port, tty->termios);
591
592 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
593 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
594 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
595 if (status) {
596 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
597 __func__, status);
598 goto unlink_int_urb;
599 }
600
601 dbg("%s - sending TI_START_PORT (2)", __func__);
602 status = ti_command_out_sync(tdev, TI_START_PORT,
603 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
604 if (status) {
605 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
606 __func__, status);
607 goto unlink_int_urb;
608 }
609
610 /* start read urb */
611 dbg("%s - start read urb", __func__);
612 urb = port->read_urb;
613 if (!urb) {
614 dev_err(&port->dev, "%s - no read urb\n", __func__);
615 status = -EINVAL;
616 goto unlink_int_urb;
617 }
618 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
619 urb->complete = ti_bulk_in_callback;
620 urb->context = tport;
621 urb->dev = dev;
622 status = usb_submit_urb(urb, GFP_KERNEL);
623 if (status) {
624 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
625 __func__, status);
626 goto unlink_int_urb;
627 }
628
629 tport->tp_is_open = 1;
630 ++tdev->td_open_port_count;
631
632 goto release_lock;
633
634 unlink_int_urb:
635 if (tdev->td_open_port_count == 0)
636 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
637 release_lock:
638 mutex_unlock(&tdev->td_open_close_lock);
639 dbg("%s - exit %d", __func__, status);
640 return status;
641 }
642
643
644 static void ti_close(struct usb_serial_port *port)
645 {
646 struct ti_device *tdev;
647 struct ti_port *tport;
648 int port_number;
649 int status;
650 int do_unlock;
651
652 dbg("%s - port %d", __func__, port->number);
653
654 tdev = usb_get_serial_data(port->serial);
655 tport = usb_get_serial_port_data(port);
656 if (tdev == NULL || tport == NULL)
657 return;
658
659 tport->tp_is_open = 0;
660
661 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
662
663 usb_kill_urb(port->read_urb);
664 usb_kill_urb(port->write_urb);
665 tport->tp_write_urb_in_use = 0;
666
667 port_number = port->number - port->serial->minor;
668
669 dbg("%s - sending TI_CLOSE_PORT", __func__);
670 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
671 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
672 if (status)
673 dev_err(&port->dev,
674 "%s - cannot send close port command, %d\n"
675 , __func__, status);
676
677 /* if mutex_lock is interrupted, continue anyway */
678 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
679 --tport->tp_tdev->td_open_port_count;
680 if (tport->tp_tdev->td_open_port_count <= 0) {
681 /* last port is closed, shut down interrupt urb */
682 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
683 tport->tp_tdev->td_open_port_count = 0;
684 }
685 if (do_unlock)
686 mutex_unlock(&tdev->td_open_close_lock);
687
688 dbg("%s - exit", __func__);
689 }
690
691
692 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
693 const unsigned char *data, int count)
694 {
695 struct ti_port *tport = usb_get_serial_port_data(port);
696 unsigned long flags;
697
698 dbg("%s - port %d", __func__, port->number);
699
700 if (count == 0) {
701 dbg("%s - write request of 0 bytes", __func__);
702 return 0;
703 }
704
705 if (tport == NULL || !tport->tp_is_open)
706 return -ENODEV;
707
708 spin_lock_irqsave(&tport->tp_lock, flags);
709 count = ti_buf_put(tport->tp_write_buf, data, count);
710 spin_unlock_irqrestore(&tport->tp_lock, flags);
711
712 ti_send(tport);
713
714 return count;
715 }
716
717
718 static int ti_write_room(struct tty_struct *tty)
719 {
720 struct usb_serial_port *port = tty->driver_data;
721 struct ti_port *tport = usb_get_serial_port_data(port);
722 int room = 0;
723 unsigned long flags;
724
725 dbg("%s - port %d", __func__, port->number);
726
727 if (tport == NULL)
728 return 0;
729
730 spin_lock_irqsave(&tport->tp_lock, flags);
731 room = ti_buf_space_avail(tport->tp_write_buf);
732 spin_unlock_irqrestore(&tport->tp_lock, flags);
733
734 dbg("%s - returns %d", __func__, room);
735 return room;
736 }
737
738
739 static int ti_chars_in_buffer(struct tty_struct *tty)
740 {
741 struct usb_serial_port *port = tty->driver_data;
742 struct ti_port *tport = usb_get_serial_port_data(port);
743 int chars = 0;
744 unsigned long flags;
745
746 dbg("%s - port %d", __func__, port->number);
747
748 if (tport == NULL)
749 return 0;
750
751 spin_lock_irqsave(&tport->tp_lock, flags);
752 chars = ti_buf_data_avail(tport->tp_write_buf);
753 spin_unlock_irqrestore(&tport->tp_lock, flags);
754
755 dbg("%s - returns %d", __func__, chars);
756 return chars;
757 }
758
759
760 static void ti_throttle(struct tty_struct *tty)
761 {
762 struct usb_serial_port *port = tty->driver_data;
763 struct ti_port *tport = usb_get_serial_port_data(port);
764
765 dbg("%s - port %d", __func__, port->number);
766
767 if (tport == NULL)
768 return;
769
770 if (I_IXOFF(tty) || C_CRTSCTS(tty))
771 ti_stop_read(tport, tty);
772
773 }
774
775
776 static void ti_unthrottle(struct tty_struct *tty)
777 {
778 struct usb_serial_port *port = tty->driver_data;
779 struct ti_port *tport = usb_get_serial_port_data(port);
780 int status;
781
782 dbg("%s - port %d", __func__, port->number);
783
784 if (tport == NULL)
785 return;
786
787 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
788 status = ti_restart_read(tport, tty);
789 if (status)
790 dev_err(&port->dev, "%s - cannot restart read, %d\n",
791 __func__, status);
792 }
793 }
794
795
796 static int ti_ioctl(struct tty_struct *tty, struct file *file,
797 unsigned int cmd, unsigned long arg)
798 {
799 struct usb_serial_port *port = tty->driver_data;
800 struct ti_port *tport = usb_get_serial_port_data(port);
801 struct async_icount cnow;
802 struct async_icount cprev;
803
804 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
805
806 if (tport == NULL)
807 return -ENODEV;
808
809 switch (cmd) {
810 case TIOCGSERIAL:
811 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
812 return ti_get_serial_info(tport,
813 (struct serial_struct __user *)arg);
814 case TIOCSSERIAL:
815 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
816 return ti_set_serial_info(tty, tport,
817 (struct serial_struct __user *)arg);
818 case TIOCMIWAIT:
819 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
820 cprev = tport->tp_icount;
821 while (1) {
822 interruptible_sleep_on(&tport->tp_msr_wait);
823 if (signal_pending(current))
824 return -ERESTARTSYS;
825 cnow = tport->tp_icount;
826 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
827 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
828 return -EIO; /* no change => error */
829 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
830 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
831 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
832 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
833 return 0;
834 cprev = cnow;
835 }
836 break;
837 case TIOCGICOUNT:
838 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
839 __func__, port->number,
840 tport->tp_icount.rx, tport->tp_icount.tx);
841 if (copy_to_user((void __user *)arg, &tport->tp_icount,
842 sizeof(tport->tp_icount)))
843 return -EFAULT;
844 return 0;
845 }
846 return -ENOIOCTLCMD;
847 }
848
849
850 static void ti_set_termios(struct tty_struct *tty,
851 struct usb_serial_port *port, struct ktermios *old_termios)
852 {
853 struct ti_port *tport = usb_get_serial_port_data(port);
854 struct ti_uart_config *config;
855 tcflag_t cflag, iflag;
856 int baud;
857 int status;
858 int port_number = port->number - port->serial->minor;
859 unsigned int mcr;
860
861 dbg("%s - port %d", __func__, port->number);
862
863 cflag = tty->termios->c_cflag;
864 iflag = tty->termios->c_iflag;
865
866 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
867 dbg("%s - old clfag %08x, old iflag %08x", __func__,
868 old_termios->c_cflag, old_termios->c_iflag);
869
870 if (tport == NULL)
871 return;
872
873 config = kmalloc(sizeof(*config), GFP_KERNEL);
874 if (!config) {
875 dev_err(&port->dev, "%s - out of memory\n", __func__);
876 return;
877 }
878
879 config->wFlags = 0;
880
881 /* these flags must be set */
882 config->wFlags |= TI_UART_ENABLE_MS_INTS;
883 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
884 config->bUartMode = (__u8)(tport->tp_uart_mode);
885
886 switch (cflag & CSIZE) {
887 case CS5:
888 config->bDataBits = TI_UART_5_DATA_BITS;
889 break;
890 case CS6:
891 config->bDataBits = TI_UART_6_DATA_BITS;
892 break;
893 case CS7:
894 config->bDataBits = TI_UART_7_DATA_BITS;
895 break;
896 default:
897 case CS8:
898 config->bDataBits = TI_UART_8_DATA_BITS;
899 break;
900 }
901
902 /* CMSPAR isn't supported by this driver */
903 tty->termios->c_cflag &= ~CMSPAR;
904
905 if (cflag & PARENB) {
906 if (cflag & PARODD) {
907 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
908 config->bParity = TI_UART_ODD_PARITY;
909 } else {
910 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
911 config->bParity = TI_UART_EVEN_PARITY;
912 }
913 } else {
914 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
915 config->bParity = TI_UART_NO_PARITY;
916 }
917
918 if (cflag & CSTOPB)
919 config->bStopBits = TI_UART_2_STOP_BITS;
920 else
921 config->bStopBits = TI_UART_1_STOP_BITS;
922
923 if (cflag & CRTSCTS) {
924 /* RTS flow control must be off to drop RTS for baud rate B0 */
925 if ((cflag & CBAUD) != B0)
926 config->wFlags |= TI_UART_ENABLE_RTS_IN;
927 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
928 } else {
929 tty->hw_stopped = 0;
930 ti_restart_read(tport, tty);
931 }
932
933 if (I_IXOFF(tty) || I_IXON(tty)) {
934 config->cXon = START_CHAR(tty);
935 config->cXoff = STOP_CHAR(tty);
936
937 if (I_IXOFF(tty))
938 config->wFlags |= TI_UART_ENABLE_X_IN;
939 else
940 ti_restart_read(tport, tty);
941
942 if (I_IXON(tty))
943 config->wFlags |= TI_UART_ENABLE_X_OUT;
944 }
945
946 baud = tty_get_baud_rate(tty);
947 if (!baud)
948 baud = 9600;
949 if (tport->tp_tdev->td_is_3410)
950 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
951 else
952 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
953
954 /* FIXME: Should calculate resulting baud here and report it back */
955 if ((cflag & CBAUD) != B0)
956 tty_encode_baud_rate(tty, baud, baud);
957
958 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
959 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
960
961 cpu_to_be16s(&config->wBaudRate);
962 cpu_to_be16s(&config->wFlags);
963
964 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
965 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
966 sizeof(*config));
967 if (status)
968 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
969 __func__, port_number, status);
970
971 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
972 mcr = tport->tp_shadow_mcr;
973 /* if baud rate is B0, clear RTS and DTR */
974 if ((cflag & CBAUD) == B0)
975 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
976 status = ti_set_mcr(tport, mcr);
977 if (status)
978 dev_err(&port->dev,
979 "%s - cannot set modem control on port %d, %d\n",
980 __func__, port_number, status);
981
982 kfree(config);
983 }
984
985
986 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
987 {
988 struct usb_serial_port *port = tty->driver_data;
989 struct ti_port *tport = usb_get_serial_port_data(port);
990 unsigned int result;
991 unsigned int msr;
992 unsigned int mcr;
993 unsigned long flags;
994
995 dbg("%s - port %d", __func__, port->number);
996
997 if (tport == NULL)
998 return -ENODEV;
999
1000 spin_lock_irqsave(&tport->tp_lock, flags);
1001 msr = tport->tp_msr;
1002 mcr = tport->tp_shadow_mcr;
1003 spin_unlock_irqrestore(&tport->tp_lock, flags);
1004
1005 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1006 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1007 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1008 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1009 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1010 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1011 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1012
1013 dbg("%s - 0x%04X", __func__, result);
1014
1015 return result;
1016 }
1017
1018
1019 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1020 unsigned int set, unsigned int clear)
1021 {
1022 struct usb_serial_port *port = tty->driver_data;
1023 struct ti_port *tport = usb_get_serial_port_data(port);
1024 unsigned int mcr;
1025 unsigned long flags;
1026
1027 dbg("%s - port %d", __func__, port->number);
1028
1029 if (tport == NULL)
1030 return -ENODEV;
1031
1032 spin_lock_irqsave(&tport->tp_lock, flags);
1033 mcr = tport->tp_shadow_mcr;
1034
1035 if (set & TIOCM_RTS)
1036 mcr |= TI_MCR_RTS;
1037 if (set & TIOCM_DTR)
1038 mcr |= TI_MCR_DTR;
1039 if (set & TIOCM_LOOP)
1040 mcr |= TI_MCR_LOOP;
1041
1042 if (clear & TIOCM_RTS)
1043 mcr &= ~TI_MCR_RTS;
1044 if (clear & TIOCM_DTR)
1045 mcr &= ~TI_MCR_DTR;
1046 if (clear & TIOCM_LOOP)
1047 mcr &= ~TI_MCR_LOOP;
1048 spin_unlock_irqrestore(&tport->tp_lock, flags);
1049
1050 return ti_set_mcr(tport, mcr);
1051 }
1052
1053
1054 static void ti_break(struct tty_struct *tty, int break_state)
1055 {
1056 struct usb_serial_port *port = tty->driver_data;
1057 struct ti_port *tport = usb_get_serial_port_data(port);
1058 int status;
1059
1060 dbg("%s - state = %d", __func__, break_state);
1061
1062 if (tport == NULL)
1063 return;
1064
1065 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1066
1067 status = ti_write_byte(tport->tp_tdev,
1068 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1069 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1070
1071 if (status)
1072 dbg("%s - error setting break, %d", __func__, status);
1073 }
1074
1075
1076 static void ti_interrupt_callback(struct urb *urb)
1077 {
1078 struct ti_device *tdev = urb->context;
1079 struct usb_serial_port *port;
1080 struct usb_serial *serial = tdev->td_serial;
1081 struct ti_port *tport;
1082 struct device *dev = &urb->dev->dev;
1083 unsigned char *data = urb->transfer_buffer;
1084 int length = urb->actual_length;
1085 int port_number;
1086 int function;
1087 int status = urb->status;
1088 int retval;
1089 __u8 msr;
1090
1091 dbg("%s", __func__);
1092
1093 switch (status) {
1094 case 0:
1095 break;
1096 case -ECONNRESET:
1097 case -ENOENT:
1098 case -ESHUTDOWN:
1099 dbg("%s - urb shutting down, %d", __func__, status);
1100 tdev->td_urb_error = 1;
1101 return;
1102 default:
1103 dev_err(dev, "%s - nonzero urb status, %d\n",
1104 __func__, status);
1105 tdev->td_urb_error = 1;
1106 goto exit;
1107 }
1108
1109 if (length != 2) {
1110 dbg("%s - bad packet size, %d", __func__, length);
1111 goto exit;
1112 }
1113
1114 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1115 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1116 goto exit;
1117 }
1118
1119 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1120 function = TI_GET_FUNC_FROM_CODE(data[0]);
1121
1122 dbg("%s - port_number %d, function %d, data 0x%02X",
1123 __func__, port_number, function, data[1]);
1124
1125 if (port_number >= serial->num_ports) {
1126 dev_err(dev, "%s - bad port number, %d\n",
1127 __func__, port_number);
1128 goto exit;
1129 }
1130
1131 port = serial->port[port_number];
1132
1133 tport = usb_get_serial_port_data(port);
1134 if (!tport)
1135 goto exit;
1136
1137 switch (function) {
1138 case TI_CODE_DATA_ERROR:
1139 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1140 __func__, port_number, data[1]);
1141 break;
1142
1143 case TI_CODE_MODEM_STATUS:
1144 msr = data[1];
1145 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1146 ti_handle_new_msr(tport, msr);
1147 break;
1148
1149 default:
1150 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1151 __func__, data[1]);
1152 break;
1153 }
1154
1155 exit:
1156 retval = usb_submit_urb(urb, GFP_ATOMIC);
1157 if (retval)
1158 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1159 __func__, retval);
1160 }
1161
1162
1163 static void ti_bulk_in_callback(struct urb *urb)
1164 {
1165 struct ti_port *tport = urb->context;
1166 struct usb_serial_port *port = tport->tp_port;
1167 struct device *dev = &urb->dev->dev;
1168 int status = urb->status;
1169 int retval = 0;
1170 struct tty_struct *tty;
1171
1172 dbg("%s", __func__);
1173
1174 switch (status) {
1175 case 0:
1176 break;
1177 case -ECONNRESET:
1178 case -ENOENT:
1179 case -ESHUTDOWN:
1180 dbg("%s - urb shutting down, %d", __func__, status);
1181 tport->tp_tdev->td_urb_error = 1;
1182 wake_up_interruptible(&tport->tp_write_wait);
1183 return;
1184 default:
1185 dev_err(dev, "%s - nonzero urb status, %d\n",
1186 __func__, status);
1187 tport->tp_tdev->td_urb_error = 1;
1188 wake_up_interruptible(&tport->tp_write_wait);
1189 }
1190
1191 if (status == -EPIPE)
1192 goto exit;
1193
1194 if (status) {
1195 dev_err(dev, "%s - stopping read!\n", __func__);
1196 return;
1197 }
1198
1199 tty = tty_port_tty_get(&port->port);
1200 if (tty) {
1201 if (urb->actual_length) {
1202 usb_serial_debug_data(debug, dev, __func__,
1203 urb->actual_length, urb->transfer_buffer);
1204
1205 if (!tport->tp_is_open)
1206 dbg("%s - port closed, dropping data",
1207 __func__);
1208 else
1209 ti_recv(&urb->dev->dev, tty,
1210 urb->transfer_buffer,
1211 urb->actual_length);
1212 spin_lock(&tport->tp_lock);
1213 tport->tp_icount.rx += urb->actual_length;
1214 spin_unlock(&tport->tp_lock);
1215 }
1216 tty_kref_put(tty);
1217 }
1218
1219 exit:
1220 /* continue to read unless stopping */
1221 spin_lock(&tport->tp_lock);
1222 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1223 urb->dev = port->serial->dev;
1224 retval = usb_submit_urb(urb, GFP_ATOMIC);
1225 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1226 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1227 }
1228 spin_unlock(&tport->tp_lock);
1229 if (retval)
1230 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1231 __func__, retval);
1232 }
1233
1234
1235 static void ti_bulk_out_callback(struct urb *urb)
1236 {
1237 struct ti_port *tport = urb->context;
1238 struct usb_serial_port *port = tport->tp_port;
1239 struct device *dev = &urb->dev->dev;
1240 int status = urb->status;
1241
1242 dbg("%s - port %d", __func__, port->number);
1243
1244 tport->tp_write_urb_in_use = 0;
1245
1246 switch (status) {
1247 case 0:
1248 break;
1249 case -ECONNRESET:
1250 case -ENOENT:
1251 case -ESHUTDOWN:
1252 dbg("%s - urb shutting down, %d", __func__, status);
1253 tport->tp_tdev->td_urb_error = 1;
1254 wake_up_interruptible(&tport->tp_write_wait);
1255 return;
1256 default:
1257 dev_err(dev, "%s - nonzero urb status, %d\n",
1258 __func__, status);
1259 tport->tp_tdev->td_urb_error = 1;
1260 wake_up_interruptible(&tport->tp_write_wait);
1261 }
1262
1263 /* send any buffered data */
1264 ti_send(tport);
1265 }
1266
1267
1268 static void ti_recv(struct device *dev, struct tty_struct *tty,
1269 unsigned char *data, int length)
1270 {
1271 int cnt;
1272
1273 do {
1274 cnt = tty_buffer_request_room(tty, length);
1275 if (cnt < length) {
1276 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1277 __func__, length - cnt);
1278 if (cnt == 0)
1279 break;
1280 }
1281 tty_insert_flip_string(tty, data, cnt);
1282 tty_flip_buffer_push(tty);
1283 data += cnt;
1284 length -= cnt;
1285 } while (length > 0);
1286
1287 }
1288
1289
1290 static void ti_send(struct ti_port *tport)
1291 {
1292 int count, result;
1293 struct usb_serial_port *port = tport->tp_port;
1294 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1295 unsigned long flags;
1296
1297
1298 dbg("%s - port %d", __func__, port->number);
1299
1300 spin_lock_irqsave(&tport->tp_lock, flags);
1301
1302 if (tport->tp_write_urb_in_use)
1303 goto unlock;
1304
1305 count = ti_buf_get(tport->tp_write_buf,
1306 port->write_urb->transfer_buffer,
1307 port->bulk_out_size);
1308
1309 if (count == 0)
1310 goto unlock;
1311
1312 tport->tp_write_urb_in_use = 1;
1313
1314 spin_unlock_irqrestore(&tport->tp_lock, flags);
1315
1316 usb_serial_debug_data(debug, &port->dev, __func__, count,
1317 port->write_urb->transfer_buffer);
1318
1319 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1320 usb_sndbulkpipe(port->serial->dev,
1321 port->bulk_out_endpointAddress),
1322 port->write_urb->transfer_buffer, count,
1323 ti_bulk_out_callback, tport);
1324
1325 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1326 if (result) {
1327 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1328 __func__, result);
1329 tport->tp_write_urb_in_use = 0;
1330 /* TODO: reschedule ti_send */
1331 } else {
1332 spin_lock_irqsave(&tport->tp_lock, flags);
1333 tport->tp_icount.tx += count;
1334 spin_unlock_irqrestore(&tport->tp_lock, flags);
1335 }
1336
1337 /* more room in the buffer for new writes, wakeup */
1338 if (tty)
1339 tty_wakeup(tty);
1340 tty_kref_put(tty);
1341 wake_up_interruptible(&tport->tp_write_wait);
1342 return;
1343 unlock:
1344 spin_unlock_irqrestore(&tport->tp_lock, flags);
1345 tty_kref_put(tty);
1346 return;
1347 }
1348
1349
1350 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1351 {
1352 unsigned long flags;
1353 int status;
1354
1355 status = ti_write_byte(tport->tp_tdev,
1356 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1357 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1358
1359 spin_lock_irqsave(&tport->tp_lock, flags);
1360 if (!status)
1361 tport->tp_shadow_mcr = mcr;
1362 spin_unlock_irqrestore(&tport->tp_lock, flags);
1363
1364 return status;
1365 }
1366
1367
1368 static int ti_get_lsr(struct ti_port *tport)
1369 {
1370 int size, status;
1371 struct ti_device *tdev = tport->tp_tdev;
1372 struct usb_serial_port *port = tport->tp_port;
1373 int port_number = port->number - port->serial->minor;
1374 struct ti_port_status *data;
1375
1376 dbg("%s - port %d", __func__, port->number);
1377
1378 size = sizeof(struct ti_port_status);
1379 data = kmalloc(size, GFP_KERNEL);
1380 if (!data) {
1381 dev_err(&port->dev, "%s - out of memory\n", __func__);
1382 return -ENOMEM;
1383 }
1384
1385 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1386 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1387 if (status) {
1388 dev_err(&port->dev,
1389 "%s - get port status command failed, %d\n",
1390 __func__, status);
1391 goto free_data;
1392 }
1393
1394 dbg("%s - lsr 0x%02X", __func__, 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 tty_struct *tty, struct ti_port *tport,
1431 struct serial_struct __user *new_arg)
1432 {
1433 struct serial_struct new_serial;
1434
1435 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1436 return -EFAULT;
1437
1438 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1439 tport->tp_closing_wait = new_serial.closing_wait;
1440
1441 return 0;
1442 }
1443
1444
1445 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1446 {
1447 struct async_icount *icount;
1448 struct tty_struct *tty;
1449 unsigned long flags;
1450
1451 dbg("%s - msr 0x%02X", __func__, msr);
1452
1453 if (msr & TI_MSR_DELTA_MASK) {
1454 spin_lock_irqsave(&tport->tp_lock, flags);
1455 icount = &tport->tp_icount;
1456 if (msr & TI_MSR_DELTA_CTS)
1457 icount->cts++;
1458 if (msr & TI_MSR_DELTA_DSR)
1459 icount->dsr++;
1460 if (msr & TI_MSR_DELTA_CD)
1461 icount->dcd++;
1462 if (msr & TI_MSR_DELTA_RI)
1463 icount->rng++;
1464 wake_up_interruptible(&tport->tp_msr_wait);
1465 spin_unlock_irqrestore(&tport->tp_lock, flags);
1466 }
1467
1468 tport->tp_msr = msr & TI_MSR_MASK;
1469
1470 /* handle CTS flow control */
1471 tty = tty_port_tty_get(&tport->tp_port->port);
1472 if (tty && C_CRTSCTS(tty)) {
1473 if (msr & TI_MSR_CTS) {
1474 tty->hw_stopped = 0;
1475 tty_wakeup(tty);
1476 } else {
1477 tty->hw_stopped = 1;
1478 }
1479 }
1480 tty_kref_put(tty);
1481 }
1482
1483
1484 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1485 {
1486 struct ti_device *tdev = tport->tp_tdev;
1487 struct usb_serial_port *port = tport->tp_port;
1488 wait_queue_t wait;
1489
1490 dbg("%s - port %d", __func__, port->number);
1491
1492 spin_lock_irq(&tport->tp_lock);
1493
1494 /* wait for data to drain from the buffer */
1495 tdev->td_urb_error = 0;
1496 init_waitqueue_entry(&wait, current);
1497 add_wait_queue(&tport->tp_write_wait, &wait);
1498 for (;;) {
1499 set_current_state(TASK_INTERRUPTIBLE);
1500 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1501 || timeout == 0 || signal_pending(current)
1502 || tdev->td_urb_error
1503 || port->serial->disconnected) /* disconnect */
1504 break;
1505 spin_unlock_irq(&tport->tp_lock);
1506 timeout = schedule_timeout(timeout);
1507 spin_lock_irq(&tport->tp_lock);
1508 }
1509 set_current_state(TASK_RUNNING);
1510 remove_wait_queue(&tport->tp_write_wait, &wait);
1511
1512 /* flush any remaining data in the buffer */
1513 if (flush)
1514 ti_buf_clear(tport->tp_write_buf);
1515
1516 spin_unlock_irq(&tport->tp_lock);
1517
1518 mutex_lock(&port->serial->disc_mutex);
1519 /* wait for data to drain from the device */
1520 /* wait for empty tx register, plus 20 ms */
1521 timeout += jiffies;
1522 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1523 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1524 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1525 && !port->serial->disconnected) {
1526 if (ti_get_lsr(tport))
1527 break;
1528 mutex_unlock(&port->serial->disc_mutex);
1529 msleep_interruptible(20);
1530 mutex_lock(&port->serial->disc_mutex);
1531 }
1532 mutex_unlock(&port->serial->disc_mutex);
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 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1559 urb = tport->tp_port->read_urb;
1560 spin_unlock_irqrestore(&tport->tp_lock, flags);
1561 urb->complete = ti_bulk_in_callback;
1562 urb->context = tport;
1563 urb->dev = tport->tp_port->serial->dev;
1564 status = usb_submit_urb(urb, GFP_KERNEL);
1565 } else {
1566 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1567 spin_unlock_irqrestore(&tport->tp_lock, flags);
1568 }
1569
1570 return status;
1571 }
1572
1573
1574 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1575 __u16 moduleid, __u16 value, __u8 *data, int size)
1576 {
1577 int status;
1578
1579 status = usb_control_msg(tdev->td_serial->dev,
1580 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1581 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1582 value, moduleid, data, size, 1000);
1583
1584 if (status == size)
1585 status = 0;
1586
1587 if (status > 0)
1588 status = -ECOMM;
1589
1590 return status;
1591 }
1592
1593
1594 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1595 __u16 moduleid, __u16 value, __u8 *data, int size)
1596 {
1597 int status;
1598
1599 status = usb_control_msg(tdev->td_serial->dev,
1600 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1601 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1602 value, moduleid, data, size, 1000);
1603
1604 if (status == size)
1605 status = 0;
1606
1607 if (status > 0)
1608 status = -ECOMM;
1609
1610 return status;
1611 }
1612
1613
1614 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1615 __u8 mask, __u8 byte)
1616 {
1617 int status;
1618 unsigned int size;
1619 struct ti_write_data_bytes *data;
1620 struct device *dev = &tdev->td_serial->dev->dev;
1621
1622 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1623 __func__, addr, mask, byte);
1624
1625 size = sizeof(struct ti_write_data_bytes) + 2;
1626 data = kmalloc(size, GFP_KERNEL);
1627 if (!data) {
1628 dev_err(dev, "%s - out of memory\n", __func__);
1629 return -ENOMEM;
1630 }
1631
1632 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1633 data->bDataType = TI_RW_DATA_BYTE;
1634 data->bDataCounter = 1;
1635 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1636 data->wBaseAddrLo = cpu_to_be16(addr);
1637 data->bData[0] = mask;
1638 data->bData[1] = byte;
1639
1640 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1641 (__u8 *)data, size);
1642
1643 if (status < 0)
1644 dev_err(dev, "%s - failed, %d\n", __func__, status);
1645
1646 kfree(data);
1647
1648 return status;
1649 }
1650
1651 static int ti_do_download(struct usb_device *dev, int pipe,
1652 u8 *buffer, int size)
1653 {
1654 int pos;
1655 u8 cs = 0;
1656 int done;
1657 struct ti_firmware_header *header;
1658 int status = 0;
1659 int len;
1660
1661 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1662 cs = (__u8)(cs + buffer[pos]);
1663
1664 header = (struct ti_firmware_header *)buffer;
1665 header->wLength = cpu_to_le16((__u16)(size
1666 - sizeof(struct ti_firmware_header)));
1667 header->bCheckSum = cs;
1668
1669 dbg("%s - downloading firmware", __func__);
1670 for (pos = 0; pos < size; pos += done) {
1671 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1672 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1673 &done, 1000);
1674 if (status)
1675 break;
1676 }
1677 return status;
1678 }
1679
1680 static int ti_download_firmware(struct ti_device *tdev)
1681 {
1682 int status;
1683 int buffer_size;
1684 __u8 *buffer;
1685 struct usb_device *dev = tdev->td_serial->dev;
1686 unsigned int pipe = usb_sndbulkpipe(dev,
1687 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1688 const struct firmware *fw_p;
1689 char buf[32];
1690
1691 /* try ID specific firmware first, then try generic firmware */
1692 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1693 dev->descriptor.idProduct);
1694 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1695 buf[0] = '\0';
1696 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1697 switch (dev->descriptor.idProduct) {
1698 case MTS_CDMA_PRODUCT_ID:
1699 strcpy(buf, "mts_cdma.fw");
1700 break;
1701 case MTS_GSM_PRODUCT_ID:
1702 strcpy(buf, "mts_gsm.fw");
1703 break;
1704 case MTS_EDGE_PRODUCT_ID:
1705 strcpy(buf, "mts_edge.fw");
1706 break;
1707 }
1708 }
1709 if (buf[0] == '\0') {
1710 if (tdev->td_is_3410)
1711 strcpy(buf, "ti_3410.fw");
1712 else
1713 strcpy(buf, "ti_5052.fw");
1714 }
1715 status = request_firmware(&fw_p, buf, &dev->dev);
1716 }
1717 if (status) {
1718 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1719 return -ENOENT;
1720 }
1721 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1722 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1723 return -ENOENT;
1724 }
1725
1726 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1727 buffer = kmalloc(buffer_size, GFP_KERNEL);
1728 if (buffer) {
1729 memcpy(buffer, fw_p->data, fw_p->size);
1730 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1731 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1732 kfree(buffer);
1733 } else {
1734 status = -ENOMEM;
1735 }
1736 release_firmware(fw_p);
1737 if (status) {
1738 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1739 __func__, status);
1740 return status;
1741 }
1742
1743 dbg("%s - download successful", __func__);
1744
1745 return 0;
1746 }
1747
1748
1749 /* Circular Buffer Functions */
1750
1751 /*
1752 * ti_buf_alloc
1753 *
1754 * Allocate a circular buffer and all associated memory.
1755 */
1756
1757 static struct circ_buf *ti_buf_alloc(void)
1758 {
1759 struct circ_buf *cb;
1760
1761 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1762 if (cb == NULL)
1763 return NULL;
1764
1765 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1766 if (cb->buf == NULL) {
1767 kfree(cb);
1768 return NULL;
1769 }
1770
1771 ti_buf_clear(cb);
1772
1773 return cb;
1774 }
1775
1776
1777 /*
1778 * ti_buf_free
1779 *
1780 * Free the buffer and all associated memory.
1781 */
1782
1783 static void ti_buf_free(struct circ_buf *cb)
1784 {
1785 kfree(cb->buf);
1786 kfree(cb);
1787 }
1788
1789
1790 /*
1791 * ti_buf_clear
1792 *
1793 * Clear out all data in the circular buffer.
1794 */
1795
1796 static void ti_buf_clear(struct circ_buf *cb)
1797 {
1798 cb->head = cb->tail = 0;
1799 }
1800
1801
1802 /*
1803 * ti_buf_data_avail
1804 *
1805 * Return the number of bytes of data available in the circular
1806 * buffer.
1807 */
1808
1809 static int ti_buf_data_avail(struct circ_buf *cb)
1810 {
1811 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1812 }
1813
1814
1815 /*
1816 * ti_buf_space_avail
1817 *
1818 * Return the number of bytes of space available in the circular
1819 * buffer.
1820 */
1821
1822 static int ti_buf_space_avail(struct circ_buf *cb)
1823 {
1824 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1825 }
1826
1827
1828 /*
1829 * ti_buf_put
1830 *
1831 * Copy data data from a user buffer and put it into the circular buffer.
1832 * Restrict to the amount of space available.
1833 *
1834 * Return the number of bytes copied.
1835 */
1836
1837 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1838 {
1839 int c, ret = 0;
1840
1841 while (1) {
1842 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1843 if (count < c)
1844 c = count;
1845 if (c <= 0)
1846 break;
1847 memcpy(cb->buf + cb->head, buf, c);
1848 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1849 buf += c;
1850 count -= c;
1851 ret += c;
1852 }
1853
1854 return ret;
1855 }
1856
1857
1858 /*
1859 * ti_buf_get
1860 *
1861 * Get data from the circular buffer and copy to the given buffer.
1862 * Restrict to the amount of data available.
1863 *
1864 * Return the number of bytes copied.
1865 */
1866
1867 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1868 {
1869 int c, ret = 0;
1870
1871 while (1) {
1872 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1873 if (count < c)
1874 c = count;
1875 if (c <= 0)
1876 break;
1877 memcpy(buf, cb->buf + cb->tail, c);
1878 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1879 buf += c;
1880 count -= c;
1881 ret += c;
1882 }
1883
1884 return ret;
1885 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree