USB: TI 3410/5052 USB Serial: convert td_open_close_lock to mutex
[linux-2.6.git] / drivers / usb / serial / ti_usb_3410_5052.c
1 /* vi: ts=8 sw=8
2  *
3  * TI 3410/5052 USB Serial Driver
4  *
5  * Copyright (C) 2004 Texas Instruments
6  *
7  * This driver is based on the Linux io_ti driver, which is
8  *   Copyright (C) 2000-2002 Inside Out Networks
9  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * For questions or problems with this driver, contact Texas Instruments
17  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18  * Peter Berger <pberger@brimson.com>.
19  * 
20  * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
21  * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
22  * configuration.
23  *
24  * #!/bin/bash
25  *
26  * BOOT_CONFIG=1
27  * ACTIVE_CONFIG=2
28  *
29  * if [[ "$ACTION" != "add" ]]
30  * then
31  *      exit
32  * fi
33  *
34  * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
35  *
36  * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
37  * then
38  *      exit
39  * fi
40  *
41  * PRODUCT=${PRODUCT%/?*}               # delete version
42  * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
43  * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
44  *
45  * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
46  *
47  * function scan() {
48  *      s=$1
49  *      shift
50  *      for i
51  *      do
52  *              if [[ $s -eq $i ]]
53  *              then
54  *                      return 0
55  *              fi
56  *      done
57  *      return 1
58  * }
59  *
60  * IFS=$IFS,
61  *
62  * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
63  * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
64  * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
65  * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
66  * then
67  *      echo $ACTIVE_CONFIG > $CONFIG_PATH
68  * fi
69  */
70
71 #include <linux/kernel.h>
72 #include <linux/errno.h>
73 #include <linux/init.h>
74 #include <linux/slab.h>
75 #include <linux/tty.h>
76 #include <linux/tty_driver.h>
77 #include <linux/tty_flip.h>
78 #include <linux/module.h>
79 #include <linux/spinlock.h>
80 #include <linux/ioctl.h>
81 #include <linux/serial.h>
82 #include <linux/circ_buf.h>
83 #include <linux/mutex.h>
84 #include <asm/uaccess.h>
85 #include <asm/semaphore.h>
86 #include <linux/usb.h>
87 #include <linux/usb/serial.h>
88
89 #include "ti_usb_3410_5052.h"
90 #include "ti_fw_3410.h"         /* firmware image for 3410 */
91 #include "ti_fw_5052.h"         /* firmware image for 5052 */
92
93
94 /* Defines */
95
96 #define TI_DRIVER_VERSION       "v0.9"
97 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
98 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
99
100 #define TI_FIRMWARE_BUF_SIZE    16284
101
102 #define TI_WRITE_BUF_SIZE       1024
103
104 #define TI_TRANSFER_TIMEOUT     2
105
106 #define TI_DEFAULT_LOW_LATENCY  0
107 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
108
109 /* supported setserial flags */
110 #define TI_SET_SERIAL_FLAGS     (ASYNC_LOW_LATENCY)
111
112 /* read urb states */
113 #define TI_READ_URB_RUNNING     0
114 #define TI_READ_URB_STOPPING    1
115 #define TI_READ_URB_STOPPED     2
116
117 #define TI_EXTRA_VID_PID_COUNT  5
118
119
120 /* Structures */
121
122 struct ti_port {
123         int                     tp_is_open;
124         __u8                    tp_msr;
125         __u8                    tp_lsr;
126         __u8                    tp_shadow_mcr;
127         __u8                    tp_uart_mode;   /* 232 or 485 modes */
128         unsigned int            tp_uart_base_addr;
129         int                     tp_flags;
130         int                     tp_closing_wait;/* in .01 secs */
131         struct async_icount     tp_icount;
132         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
133         wait_queue_head_t       tp_write_wait;
134         struct ti_device        *tp_tdev;
135         struct usb_serial_port  *tp_port;
136         spinlock_t              tp_lock;
137         int                     tp_read_urb_state;
138         int                     tp_write_urb_in_use;
139         struct circ_buf         *tp_write_buf;
140 };
141
142 struct ti_device {
143         struct mutex            td_open_close_lock;
144         int                     td_open_port_count;
145         struct usb_serial       *td_serial;
146         int                     td_is_3410;
147         int                     td_urb_error;
148 };
149
150
151 /* Function Declarations */
152
153 static int ti_startup(struct usb_serial *serial);
154 static void ti_shutdown(struct usb_serial *serial);
155 static int ti_open(struct usb_serial_port *port, struct file *file);
156 static void ti_close(struct usb_serial_port *port, struct file *file);
157 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
158         int count);
159 static int ti_write_room(struct usb_serial_port *port);
160 static int ti_chars_in_buffer(struct usb_serial_port *port);
161 static void ti_throttle(struct usb_serial_port *port);
162 static void ti_unthrottle(struct usb_serial_port *port);
163 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
164 static void ti_set_termios(struct usb_serial_port *port,
165         struct ktermios *old_termios);
166 static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
167 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
168         unsigned int set, unsigned int clear);
169 static void ti_break(struct usb_serial_port *port, int break_state);
170 static void ti_interrupt_callback(struct urb *urb);
171 static void ti_bulk_in_callback(struct urb *urb);
172 static void ti_bulk_out_callback(struct urb *urb);
173
174 static void ti_recv(struct device *dev, struct tty_struct *tty,
175         unsigned char *data, int length);
176 static void ti_send(struct ti_port *tport);
177 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
178 static int ti_get_lsr(struct ti_port *tport);
179 static int ti_get_serial_info(struct ti_port *tport,
180         struct serial_struct __user *ret_arg);
181 static int ti_set_serial_info(struct ti_port *tport,
182         struct serial_struct __user *new_arg);
183 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
184
185 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
186
187 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
188 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
189
190 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
191         __u16 moduleid, __u16 value, __u8 *data, int size);
192 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
193         __u16 moduleid, __u16 value, __u8 *data, int size);
194
195 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
196         __u8 mask, __u8 byte);
197
198 static int ti_download_firmware(struct ti_device *tdev,
199         unsigned char *firmware, unsigned int firmware_size);
200
201 /* circular buffer */
202 static struct circ_buf *ti_buf_alloc(void);
203 static void ti_buf_free(struct circ_buf *cb);
204 static void ti_buf_clear(struct circ_buf *cb);
205 static int ti_buf_data_avail(struct circ_buf *cb);
206 static int ti_buf_space_avail(struct circ_buf *cb);
207 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
208 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
209
210
211 /* Data */
212
213 /* module parameters */
214 static int debug;
215 static int low_latency = TI_DEFAULT_LOW_LATENCY;
216 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
217 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
218 static unsigned int vendor_3410_count;
219 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
220 static unsigned int product_3410_count;
221 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
222 static unsigned int vendor_5052_count;
223 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
224 static unsigned int product_5052_count;
225
226 /* supported devices */
227 /* the array dimension is the number of default entries plus */
228 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
229 /* null entry */
230 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
231         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
232         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
233 };
234
235 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
236         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
237         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
238         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
239         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
240 };
241
242 static struct usb_device_id ti_id_table_combined[] = {
243         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
244         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
245         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
246         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
247         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
248         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
249         { }
250 };
251
252 static struct usb_driver ti_usb_driver = {
253         .name                   = "ti_usb_3410_5052",
254         .probe                  = usb_serial_probe,
255         .disconnect             = usb_serial_disconnect,
256         .id_table               = ti_id_table_combined,
257         .no_dynamic_id =        1,
258 };
259
260 static struct usb_serial_driver ti_1port_device = {
261         .driver = {
262                 .owner          = THIS_MODULE,
263                 .name           = "ti_usb_3410_5052_1",
264         },
265         .description            = "TI USB 3410 1 port adapter",
266         .usb_driver             = &ti_usb_driver,
267         .id_table               = ti_id_table_3410,
268         .num_interrupt_in       = 1,
269         .num_bulk_in            = 1,
270         .num_bulk_out           = 1,
271         .num_ports              = 1,
272         .attach                 = ti_startup,
273         .shutdown               = ti_shutdown,
274         .open                   = ti_open,
275         .close                  = ti_close,
276         .write                  = ti_write,
277         .write_room             = ti_write_room,
278         .chars_in_buffer        = ti_chars_in_buffer,
279         .throttle               = ti_throttle,
280         .unthrottle             = ti_unthrottle,
281         .ioctl                  = ti_ioctl,
282         .set_termios            = ti_set_termios,
283         .tiocmget               = ti_tiocmget,
284         .tiocmset               = ti_tiocmset,
285         .break_ctl              = ti_break,
286         .read_int_callback      = ti_interrupt_callback,
287         .read_bulk_callback     = ti_bulk_in_callback,
288         .write_bulk_callback    = ti_bulk_out_callback,
289 };
290
291 static struct usb_serial_driver ti_2port_device = {
292         .driver = {
293                 .owner          = THIS_MODULE,
294                 .name           = "ti_usb_3410_5052_2",
295         },
296         .description            = "TI USB 5052 2 port adapter",
297         .usb_driver             = &ti_usb_driver,
298         .id_table               = ti_id_table_5052,
299         .num_interrupt_in       = 1,
300         .num_bulk_in            = 2,
301         .num_bulk_out           = 2,
302         .num_ports              = 2,
303         .attach                 = ti_startup,
304         .shutdown               = ti_shutdown,
305         .open                   = ti_open,
306         .close                  = ti_close,
307         .write                  = ti_write,
308         .write_room             = ti_write_room,
309         .chars_in_buffer        = ti_chars_in_buffer,
310         .throttle               = ti_throttle,
311         .unthrottle             = ti_unthrottle,
312         .ioctl                  = ti_ioctl,
313         .set_termios            = ti_set_termios,
314         .tiocmget               = ti_tiocmget,
315         .tiocmset               = ti_tiocmset,
316         .break_ctl              = ti_break,
317         .read_int_callback      = ti_interrupt_callback,
318         .read_bulk_callback     = ti_bulk_in_callback,
319         .write_bulk_callback    = ti_bulk_out_callback,
320 };
321
322
323 /* Module */
324
325 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
326 MODULE_DESCRIPTION(TI_DRIVER_DESC);
327 MODULE_VERSION(TI_DRIVER_VERSION);
328 MODULE_LICENSE("GPL");
329
330 module_param(debug, bool, S_IRUGO | S_IWUSR);
331 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
332
333 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
334 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
335
336 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
337 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
338
339 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
340 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
341 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
342 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
343 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
344 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
345 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
346 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
347
348 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
349
350
351 /* Functions */
352
353 static int __init ti_init(void)
354 {
355         int i,j;
356         int ret;
357
358         /* insert extra vendor and product ids */
359         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
360         for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
361                 ti_id_table_3410[j].idVendor = vendor_3410[i];
362                 ti_id_table_3410[j].idProduct = product_3410[i];
363                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
364         }
365         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
366         for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
367                 ti_id_table_5052[j].idVendor = vendor_5052[i];
368                 ti_id_table_5052[j].idProduct = product_5052[i];
369                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
370         }
371
372         ret = usb_serial_register(&ti_1port_device);
373         if (ret)
374                 goto failed_1port;
375         ret = usb_serial_register(&ti_2port_device);
376         if (ret)
377                 goto failed_2port;
378
379         ret = usb_register(&ti_usb_driver);
380         if (ret)
381                 goto failed_usb;
382
383         info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
384
385         return 0;
386
387 failed_usb:
388         usb_serial_deregister(&ti_2port_device);
389 failed_2port:
390         usb_serial_deregister(&ti_1port_device);
391 failed_1port:
392         return ret;
393 }
394
395
396 static void __exit ti_exit(void)
397 {
398         usb_serial_deregister(&ti_1port_device);
399         usb_serial_deregister(&ti_2port_device);
400         usb_deregister(&ti_usb_driver);
401 }
402
403
404 module_init(ti_init);
405 module_exit(ti_exit);
406
407
408 static int ti_startup(struct usb_serial *serial)
409 {
410         struct ti_device *tdev;
411         struct ti_port *tport;
412         struct usb_device *dev = serial->dev;
413         int status;
414         int i;
415
416
417         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
418             __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
419             dev->descriptor.bNumConfigurations,
420             dev->actconfig->desc.bConfigurationValue);
421
422         /* create device structure */
423         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
424         if (tdev == NULL) {
425                 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
426                 return -ENOMEM;
427         }
428         mutex_init(&tdev->td_open_close_lock);
429         tdev->td_serial = serial;
430         usb_set_serial_data(serial, tdev);
431
432         /* determine device type */
433         if (usb_match_id(serial->interface, ti_id_table_3410))
434                 tdev->td_is_3410 = 1;
435         dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
436
437         /* if we have only 1 configuration, download firmware */
438         if (dev->descriptor.bNumConfigurations == 1) {
439
440                 if (tdev->td_is_3410)
441                         status = ti_download_firmware(tdev, ti_fw_3410,
442                                 sizeof(ti_fw_3410));
443                 else
444                         status = ti_download_firmware(tdev, ti_fw_5052,
445                                 sizeof(ti_fw_5052));
446                 if (status)
447                         goto free_tdev;
448
449                 /* 3410 must be reset, 5052 resets itself */
450                 if (tdev->td_is_3410) {
451                         msleep_interruptible(100);
452                         usb_reset_device(dev);
453                 }
454
455                 status = -ENODEV;
456                 goto free_tdev;
457         } 
458
459         /* the second configuration must be set (in sysfs by hotplug script) */
460         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
461                 status = -ENODEV;
462                 goto free_tdev;
463         }
464
465         /* set up port structures */
466         for (i = 0; i < serial->num_ports; ++i) {
467                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
468                 if (tport == NULL) {
469                         dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
470                         status = -ENOMEM;
471                         goto free_tports;
472                 }
473                 spin_lock_init(&tport->tp_lock);
474                 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
475                 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
476                 tport->tp_closing_wait = closing_wait;
477                 init_waitqueue_head(&tport->tp_msr_wait);
478                 init_waitqueue_head(&tport->tp_write_wait);
479                 tport->tp_write_buf = ti_buf_alloc();
480                 if (tport->tp_write_buf == NULL) {
481                         dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
482                         kfree(tport);
483                         status = -ENOMEM;
484                         goto free_tports;
485                 }
486                 tport->tp_port = serial->port[i];
487                 tport->tp_tdev = tdev;
488                 usb_set_serial_port_data(serial->port[i], tport);
489                 tport->tp_uart_mode = 0;        /* default is RS232 */
490         }
491         
492         return 0;
493
494 free_tports:
495         for (--i; i>=0; --i) {
496                 tport = usb_get_serial_port_data(serial->port[i]);
497                 ti_buf_free(tport->tp_write_buf);
498                 kfree(tport);
499                 usb_set_serial_port_data(serial->port[i], NULL);
500         }
501 free_tdev:
502         kfree(tdev);
503         usb_set_serial_data(serial, NULL);
504         return status;
505 }
506
507
508 static void ti_shutdown(struct usb_serial *serial)
509 {
510         int i;
511         struct ti_device *tdev = usb_get_serial_data(serial);
512         struct ti_port *tport;
513
514         dbg("%s", __FUNCTION__);
515
516         for (i=0; i < serial->num_ports; ++i) {
517                 tport = usb_get_serial_port_data(serial->port[i]);
518                 if (tport) {
519                         ti_buf_free(tport->tp_write_buf);
520                         kfree(tport);
521                         usb_set_serial_port_data(serial->port[i], NULL);
522                 }
523         }
524
525         kfree(tdev);
526         usb_set_serial_data(serial, NULL);
527 }
528
529
530 static int ti_open(struct usb_serial_port *port, struct file *file)
531 {
532         struct ti_port *tport = usb_get_serial_port_data(port);
533         struct ti_device *tdev;
534         struct usb_device *dev;
535         struct urb *urb;
536         int port_number;
537         int status;
538         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 
539                              TI_PIPE_TIMEOUT_ENABLE | 
540                              (TI_TRANSFER_TIMEOUT << 2));
541
542         dbg("%s - port %d", __FUNCTION__, port->number);
543
544         if (tport == NULL)
545                 return -ENODEV;
546
547         dev = port->serial->dev;
548         tdev = tport->tp_tdev;
549
550         /* only one open on any port on a device at a time */
551         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
552                 return -ERESTARTSYS;
553
554         if (port->tty)
555                 port->tty->low_latency = 
556                         (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
557
558         port_number = port->number - port->serial->minor;
559
560         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
561
562         tport->tp_msr = 0;
563         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
564
565         /* start interrupt urb the first time a port is opened on this device */
566         if (tdev->td_open_port_count == 0) {
567                 dbg("%s - start interrupt in urb", __FUNCTION__);
568                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
569                 if (!urb) {
570                         dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
571                         status = -EINVAL;
572                         goto release_lock;
573                 }
574                 urb->complete = ti_interrupt_callback;
575                 urb->context = tdev;
576                 urb->dev = dev;
577                 status = usb_submit_urb(urb, GFP_KERNEL);
578                 if (status) {
579                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
580                         goto release_lock;
581                 }
582         }
583
584         ti_set_termios(port, NULL);
585
586         dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
587         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
588                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
589         if (status) {
590                 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
591                 goto unlink_int_urb;
592         }
593
594         dbg("%s - sending TI_START_PORT", __FUNCTION__);
595         status = ti_command_out_sync(tdev, TI_START_PORT,
596                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
597         if (status) {
598                 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
599                 goto unlink_int_urb;
600         }
601
602         dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
603         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
604                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
605         if (status) {
606                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
607                 goto unlink_int_urb;
608         }
609         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
610                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
611         if (status) {
612                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
613                 goto unlink_int_urb;
614         }
615
616         /* reset the data toggle on the bulk endpoints to work around bug in
617          * host controllers where things get out of sync some times */
618         usb_clear_halt(dev, port->write_urb->pipe);
619         usb_clear_halt(dev, port->read_urb->pipe);
620
621         ti_set_termios(port, NULL);
622
623         dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
624         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
625                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
626         if (status) {
627                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
628                 goto unlink_int_urb;
629         }
630
631         dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
632         status = ti_command_out_sync(tdev, TI_START_PORT,
633                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
634         if (status) {
635                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
636                 goto unlink_int_urb;
637         }
638
639         /* start read urb */
640         dbg("%s - start read urb", __FUNCTION__);
641         urb = port->read_urb;
642         if (!urb) {
643                 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
644                 status = -EINVAL;
645                 goto unlink_int_urb;
646         }
647         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
648         urb->complete = ti_bulk_in_callback;
649         urb->context = tport;
650         urb->dev = dev;
651         status = usb_submit_urb(urb, GFP_KERNEL);
652         if (status) {
653                 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
654                 goto unlink_int_urb;
655         }
656
657         tport->tp_is_open = 1;
658         ++tdev->td_open_port_count;
659
660         goto release_lock;
661
662 unlink_int_urb:
663         if (tdev->td_open_port_count == 0)
664                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
665 release_lock:
666         mutex_unlock(&tdev->td_open_close_lock);
667         dbg("%s - exit %d", __FUNCTION__, status);
668         return status;
669 }
670
671
672 static void ti_close(struct usb_serial_port *port, struct file *file)
673 {
674         struct ti_device *tdev;
675         struct ti_port *tport;
676         int port_number;
677         int status;
678         int do_unlock;
679
680         dbg("%s - port %d", __FUNCTION__, port->number);
681                          
682         tdev = usb_get_serial_data(port->serial);
683         tport = usb_get_serial_port_data(port);
684         if (tdev == NULL || tport == NULL)
685                 return;
686
687         tport->tp_is_open = 0;
688
689         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
690
691         usb_kill_urb(port->read_urb);
692         usb_kill_urb(port->write_urb);
693         tport->tp_write_urb_in_use = 0;
694
695         port_number = port->number - port->serial->minor;
696
697         dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
698         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
699                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
700         if (status)
701                 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
702
703         /* if mutex_lock is interrupted, continue anyway */
704         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
705         --tport->tp_tdev->td_open_port_count;
706         if (tport->tp_tdev->td_open_port_count <= 0) {
707                 /* last port is closed, shut down interrupt urb */
708                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
709                 tport->tp_tdev->td_open_port_count = 0;
710         }
711         if (do_unlock)
712                 mutex_unlock(&tdev->td_open_close_lock);
713
714         dbg("%s - exit", __FUNCTION__);
715 }
716
717
718 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
719         int count)
720 {
721         struct ti_port *tport = usb_get_serial_port_data(port);
722         unsigned long flags;
723
724         dbg("%s - port %d", __FUNCTION__, port->number);
725
726         if (count == 0) {
727                 dbg("%s - write request of 0 bytes", __FUNCTION__);
728                 return 0;
729         }
730
731         if (tport == NULL || !tport->tp_is_open)
732                 return -ENODEV;
733
734         spin_lock_irqsave(&tport->tp_lock, flags);
735         count = ti_buf_put(tport->tp_write_buf, data, count);
736         spin_unlock_irqrestore(&tport->tp_lock, flags);
737
738         ti_send(tport);
739
740         return count;
741 }
742
743
744 static int ti_write_room(struct usb_serial_port *port)
745 {
746         struct ti_port *tport = usb_get_serial_port_data(port);
747         int room = 0;
748         unsigned long flags;
749
750         dbg("%s - port %d", __FUNCTION__, port->number);
751
752         if (tport == NULL)
753                 return -ENODEV;
754         
755         spin_lock_irqsave(&tport->tp_lock, flags);
756         room = ti_buf_space_avail(tport->tp_write_buf);
757         spin_unlock_irqrestore(&tport->tp_lock, flags);
758
759         dbg("%s - returns %d", __FUNCTION__, room);
760         return room;
761 }
762
763
764 static int ti_chars_in_buffer(struct usb_serial_port *port)
765 {
766         struct ti_port *tport = usb_get_serial_port_data(port);
767         int chars = 0;
768         unsigned long flags;
769
770         dbg("%s - port %d", __FUNCTION__, port->number);
771
772         if (tport == NULL)
773                 return -ENODEV;
774
775         spin_lock_irqsave(&tport->tp_lock, flags);
776         chars = ti_buf_data_avail(tport->tp_write_buf);
777         spin_unlock_irqrestore(&tport->tp_lock, flags);
778
779         dbg("%s - returns %d", __FUNCTION__, chars);
780         return chars;
781 }
782
783
784 static void ti_throttle(struct usb_serial_port *port)
785 {
786         struct ti_port *tport = usb_get_serial_port_data(port);
787         struct tty_struct *tty;
788
789         dbg("%s - port %d", __FUNCTION__, port->number);
790
791         if (tport == NULL)
792                 return;
793
794         tty = port->tty;
795         if (!tty) {
796                 dbg("%s - no tty", __FUNCTION__);
797                 return;
798         }
799
800         if (I_IXOFF(tty) || C_CRTSCTS(tty))
801                 ti_stop_read(tport, tty);
802
803 }
804
805
806 static void ti_unthrottle(struct usb_serial_port *port)
807 {
808         struct ti_port *tport = usb_get_serial_port_data(port);
809         struct tty_struct *tty;
810         int status;
811
812         dbg("%s - port %d", __FUNCTION__, port->number);
813
814         if (tport == NULL)
815                 return;
816
817         tty = port->tty;
818         if (!tty) {
819                 dbg("%s - no tty", __FUNCTION__);
820                 return;
821         }
822
823         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
824                 status = ti_restart_read(tport, tty);
825                 if (status)
826                         dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
827         }
828 }
829
830
831 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
832         unsigned int cmd, unsigned long arg)
833 {
834         struct ti_port *tport = usb_get_serial_port_data(port);
835         struct async_icount cnow;
836         struct async_icount cprev;
837
838         dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
839
840         if (tport == NULL)
841                 return -ENODEV;
842
843         switch (cmd) {
844                 case TIOCGSERIAL:
845                         dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
846                         return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
847                         break;
848
849                 case TIOCSSERIAL:
850                         dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
851                         return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
852                         break;
853
854                 case TIOCMIWAIT:
855                         dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
856                         cprev = tport->tp_icount;
857                         while (1) {
858                                 interruptible_sleep_on(&tport->tp_msr_wait);
859                                 if (signal_pending(current))
860                                         return -ERESTARTSYS;
861                                 cnow = tport->tp_icount;
862                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
863                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
864                                         return -EIO; /* no change => error */
865                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
866                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
867                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
868                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
869                                         return 0;
870                                 }
871                                 cprev = cnow;
872                         }
873                         break;
874
875                 case TIOCGICOUNT:
876                         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
877                         if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
878                                 return -EFAULT;
879                         return 0;
880         }
881
882         return -ENOIOCTLCMD;
883 }
884
885
886 static void ti_set_termios(struct usb_serial_port *port,
887         struct ktermios *old_termios)
888 {
889         struct ti_port *tport = usb_get_serial_port_data(port);
890         struct tty_struct *tty = port->tty;
891         struct ti_uart_config *config;
892         tcflag_t cflag,iflag;
893         int baud;
894         int status;
895         int port_number = port->number - port->serial->minor;
896         unsigned int mcr;
897
898         dbg("%s - port %d", __FUNCTION__, port->number);
899
900         if (!tty || !tty->termios) {
901                 dbg("%s - no tty or termios", __FUNCTION__);
902                 return;
903         }
904
905         cflag = tty->termios->c_cflag;
906         iflag = tty->termios->c_iflag;
907
908         if (old_termios && cflag == old_termios->c_cflag
909         && iflag == old_termios->c_iflag) {
910                 dbg("%s - nothing to change", __FUNCTION__);
911                 return;
912         }
913
914         dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
915
916         if (old_termios)
917                 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
918
919         if (tport == NULL)
920                 return;
921
922         config = kmalloc(sizeof(*config), GFP_KERNEL);
923         if (!config) {
924                 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
925                 return;
926         }
927
928         config->wFlags = 0;
929
930         /* these flags must be set */
931         config->wFlags |= TI_UART_ENABLE_MS_INTS;
932         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
933         config->bUartMode = (__u8)(tport->tp_uart_mode);
934
935         switch (cflag & CSIZE) {
936                 case CS5:
937                             config->bDataBits = TI_UART_5_DATA_BITS;
938                             break;
939                 case CS6:
940                             config->bDataBits = TI_UART_6_DATA_BITS;
941                             break;
942                 case CS7:
943                             config->bDataBits = TI_UART_7_DATA_BITS;
944                             break;
945                 default:
946                 case CS8:
947                             config->bDataBits = TI_UART_8_DATA_BITS;
948                             break;
949         }
950
951         if (cflag & PARENB) {
952                 if (cflag & PARODD) {
953                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
954                         config->bParity = TI_UART_ODD_PARITY;
955                 } else {
956                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
957                         config->bParity = TI_UART_EVEN_PARITY;
958                 }
959         } else {
960                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
961                 config->bParity = TI_UART_NO_PARITY;    
962         }
963
964         if (cflag & CSTOPB)
965                 config->bStopBits = TI_UART_2_STOP_BITS;
966         else
967                 config->bStopBits = TI_UART_1_STOP_BITS;
968
969         if (cflag & CRTSCTS) {
970                 /* RTS flow control must be off to drop RTS for baud rate B0 */
971                 if ((cflag & CBAUD) != B0)
972                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
973                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
974         } else {
975                 tty->hw_stopped = 0;
976                 ti_restart_read(tport, tty);
977         }
978
979         if (I_IXOFF(tty) || I_IXON(tty)) {
980                 config->cXon  = START_CHAR(tty);
981                 config->cXoff = STOP_CHAR(tty);
982
983                 if (I_IXOFF(tty))
984                         config->wFlags |= TI_UART_ENABLE_X_IN;
985                 else
986                         ti_restart_read(tport, tty);
987
988                 if (I_IXON(tty))
989                         config->wFlags |= TI_UART_ENABLE_X_OUT;
990         }
991
992         baud = tty_get_baud_rate(tty);
993         if (!baud) baud = 9600;
994         if (tport->tp_tdev->td_is_3410)
995                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
996         else
997                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
998
999         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
1000         __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
1001
1002         cpu_to_be16s(&config->wBaudRate);
1003         cpu_to_be16s(&config->wFlags);
1004
1005         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1006                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1007                 sizeof(*config));
1008         if (status)
1009                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1010
1011         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1012         mcr = tport->tp_shadow_mcr;
1013         /* if baud rate is B0, clear RTS and DTR */
1014         if ((cflag & CBAUD) == B0)
1015                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1016         status = ti_set_mcr(tport, mcr);
1017         if (status)
1018                 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1019
1020         kfree(config);
1021 }
1022
1023
1024 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1025 {
1026         struct ti_port *tport = usb_get_serial_port_data(port);
1027         unsigned int result;
1028         unsigned int msr;
1029         unsigned int mcr;
1030
1031         dbg("%s - port %d", __FUNCTION__, port->number);
1032
1033         if (tport == NULL)
1034                 return -ENODEV;
1035
1036         msr = tport->tp_msr;
1037         mcr = tport->tp_shadow_mcr;
1038
1039         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1040                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1041                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1042                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1043                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1044                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1045                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1046
1047         dbg("%s - 0x%04X", __FUNCTION__, result);
1048
1049         return result;
1050 }
1051
1052
1053 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1054         unsigned int set, unsigned int clear)
1055 {
1056         struct ti_port *tport = usb_get_serial_port_data(port);
1057         unsigned int mcr;
1058
1059         dbg("%s - port %d", __FUNCTION__, port->number);
1060
1061         if (tport == NULL)
1062                 return -ENODEV;
1063
1064         mcr = tport->tp_shadow_mcr;
1065
1066         if (set & TIOCM_RTS)
1067                 mcr |= TI_MCR_RTS;
1068         if (set & TIOCM_DTR)
1069                 mcr |= TI_MCR_DTR;
1070         if (set & TIOCM_LOOP)
1071                 mcr |= TI_MCR_LOOP;
1072
1073         if (clear & TIOCM_RTS)
1074                 mcr &= ~TI_MCR_RTS;
1075         if (clear & TIOCM_DTR)
1076                 mcr &= ~TI_MCR_DTR;
1077         if (clear & TIOCM_LOOP)
1078                 mcr &= ~TI_MCR_LOOP;
1079
1080         return ti_set_mcr(tport, mcr);
1081 }
1082
1083
1084 static void ti_break(struct usb_serial_port *port, int break_state)
1085 {
1086         struct ti_port *tport = usb_get_serial_port_data(port);
1087         int status;
1088
1089         dbg("%s - state = %d", __FUNCTION__, break_state);
1090
1091         if (tport == NULL)
1092                 return;
1093
1094         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1095
1096         status = ti_write_byte(tport->tp_tdev,
1097                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1098                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1099
1100         if (status)
1101                 dbg("%s - error setting break, %d", __FUNCTION__, status);
1102 }
1103
1104
1105 static void ti_interrupt_callback(struct urb *urb)
1106 {
1107         struct ti_device *tdev = (struct ti_device *)urb->context;
1108         struct usb_serial_port *port;
1109         struct usb_serial *serial = tdev->td_serial;
1110         struct ti_port *tport;
1111         struct device *dev = &urb->dev->dev;
1112         unsigned char *data = urb->transfer_buffer;
1113         int length = urb->actual_length;
1114         int port_number;
1115         int function;
1116         int status = urb->status;
1117         int retval;
1118         __u8 msr;
1119
1120         dbg("%s", __FUNCTION__);
1121
1122         switch (status) {
1123         case 0:
1124                 break;
1125         case -ECONNRESET:
1126         case -ENOENT:
1127         case -ESHUTDOWN:
1128                 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1129                 tdev->td_urb_error = 1;
1130                 return;
1131         default:
1132                 dev_err(dev, "%s - nonzero urb status, %d\n",
1133                         __FUNCTION__, status);
1134                 tdev->td_urb_error = 1;
1135                 goto exit;
1136         }
1137
1138         if (length != 2) {
1139                 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1140                 goto exit;
1141         }
1142
1143         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1144                 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1145                 goto exit;
1146         }
1147
1148         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1149         function = TI_GET_FUNC_FROM_CODE(data[0]);
1150
1151         dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1152
1153         if (port_number >= serial->num_ports) {
1154                 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1155                 goto exit;
1156         }
1157
1158         port = serial->port[port_number];
1159
1160         tport = usb_get_serial_port_data(port);
1161         if (!tport)
1162                 goto exit;
1163
1164         switch (function) {
1165         case TI_CODE_DATA_ERROR:
1166                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1167                 break;
1168
1169         case TI_CODE_MODEM_STATUS:
1170                 msr = data[1];
1171                 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1172                 ti_handle_new_msr(tport, msr);
1173                 break;
1174
1175         default:
1176                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1177                 break;
1178         }
1179
1180 exit:
1181         retval = usb_submit_urb(urb, GFP_ATOMIC);
1182         if (retval)
1183                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1184                         __FUNCTION__, retval);
1185 }
1186
1187
1188 static void ti_bulk_in_callback(struct urb *urb)
1189 {
1190         struct ti_port *tport = (struct ti_port *)urb->context;
1191         struct usb_serial_port *port = tport->tp_port;
1192         struct device *dev = &urb->dev->dev;
1193         int status = urb->status;
1194         int retval = 0;
1195
1196         dbg("%s", __FUNCTION__);
1197
1198         switch (status) {
1199         case 0:
1200                 break;
1201         case -ECONNRESET:
1202         case -ENOENT:
1203         case -ESHUTDOWN:
1204                 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1205                 tport->tp_tdev->td_urb_error = 1;
1206                 wake_up_interruptible(&tport->tp_write_wait);
1207                 return;
1208         default:
1209                 dev_err(dev, "%s - nonzero urb status, %d\n",
1210                         __FUNCTION__, status );
1211                 tport->tp_tdev->td_urb_error = 1;
1212                 wake_up_interruptible(&tport->tp_write_wait);
1213         }
1214
1215         if (status == -EPIPE)
1216                 goto exit;
1217
1218         if (status) {
1219                 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1220                 return;
1221         }
1222
1223         if (port->tty && urb->actual_length) {
1224                 usb_serial_debug_data(debug, dev, __FUNCTION__,
1225                         urb->actual_length, urb->transfer_buffer);
1226
1227                 if (!tport->tp_is_open)
1228                         dbg("%s - port closed, dropping data", __FUNCTION__);
1229                 else
1230                         ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1231                                 urb->actual_length);
1232
1233                 spin_lock(&tport->tp_lock);
1234                 tport->tp_icount.rx += urb->actual_length;
1235                 spin_unlock(&tport->tp_lock);
1236         }
1237
1238 exit:
1239         /* continue to read unless stopping */
1240         spin_lock(&tport->tp_lock);
1241         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1242                 urb->dev = port->serial->dev;
1243                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1244         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1245                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1246         }
1247         spin_unlock(&tport->tp_lock);
1248         if (retval)
1249                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1250                         __FUNCTION__, retval);
1251 }
1252
1253
1254 static void ti_bulk_out_callback(struct urb *urb)
1255 {
1256         struct ti_port *tport = (struct ti_port *)urb->context;
1257         struct usb_serial_port *port = tport->tp_port;
1258         struct device *dev = &urb->dev->dev;
1259         int status = urb->status;
1260
1261         dbg("%s - port %d", __FUNCTION__, port->number);
1262
1263         tport->tp_write_urb_in_use = 0;
1264
1265         switch (status) {
1266         case 0:
1267                 break;
1268         case -ECONNRESET:
1269         case -ENOENT:
1270         case -ESHUTDOWN:
1271                 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1272                 tport->tp_tdev->td_urb_error = 1;
1273                 wake_up_interruptible(&tport->tp_write_wait);
1274                 return;
1275         default:
1276                 dev_err(dev, "%s - nonzero urb status, %d\n",
1277                         __FUNCTION__, status);
1278                 tport->tp_tdev->td_urb_error = 1;
1279                 wake_up_interruptible(&tport->tp_write_wait);
1280         }
1281
1282         /* send any buffered data */
1283         ti_send(tport);
1284 }
1285
1286
1287 static void ti_recv(struct device *dev, struct tty_struct *tty,
1288         unsigned char *data, int length)
1289 {
1290         int cnt;
1291
1292         do {
1293                 cnt = tty_buffer_request_room(tty, length);
1294                 if (cnt < length) {
1295                         dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1296                         if(cnt == 0)
1297                                 break;
1298                 }
1299                 tty_insert_flip_string(tty, data, cnt);
1300                 tty_flip_buffer_push(tty);
1301                 data += cnt;
1302                 length -= cnt;
1303         } while (length > 0);
1304
1305 }
1306
1307
1308 static void ti_send(struct ti_port *tport)
1309 {
1310         int count, result;
1311         struct usb_serial_port *port = tport->tp_port;
1312         struct tty_struct *tty = port->tty;
1313         unsigned long flags;
1314
1315
1316         dbg("%s - port %d", __FUNCTION__, port->number);
1317
1318         spin_lock_irqsave(&tport->tp_lock, flags);
1319
1320         if (tport->tp_write_urb_in_use) {
1321                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1322                 return;
1323         }
1324
1325         count = ti_buf_get(tport->tp_write_buf,
1326                                 port->write_urb->transfer_buffer,
1327                                 port->bulk_out_size);
1328
1329         if (count == 0) {
1330                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1331                 return;
1332         }
1333
1334         tport->tp_write_urb_in_use = 1;
1335
1336         spin_unlock_irqrestore(&tport->tp_lock, flags);
1337
1338         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1339
1340         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1341                            usb_sndbulkpipe(port->serial->dev,
1342                                             port->bulk_out_endpointAddress),
1343                            port->write_urb->transfer_buffer, count,
1344                            ti_bulk_out_callback, tport);
1345
1346         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1347         if (result) {
1348                 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1349                 tport->tp_write_urb_in_use = 0; 
1350                 /* TODO: reschedule ti_send */
1351         } else {
1352                 spin_lock_irqsave(&tport->tp_lock, flags);
1353                 tport->tp_icount.tx += count;
1354                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1355         }
1356
1357         /* more room in the buffer for new writes, wakeup */
1358         if (tty)
1359                 tty_wakeup(tty);
1360         wake_up_interruptible(&tport->tp_write_wait);
1361 }
1362
1363
1364 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1365 {
1366         int status;
1367
1368         status = ti_write_byte(tport->tp_tdev,
1369                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1370                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1371
1372         if (!status)
1373                 tport->tp_shadow_mcr = mcr;
1374
1375         return status;
1376 }
1377
1378
1379 static int ti_get_lsr(struct ti_port *tport)
1380 {
1381         int size,status;
1382         struct ti_device *tdev = tport->tp_tdev;
1383         struct usb_serial_port *port = tport->tp_port;
1384         int port_number = port->number - port->serial->minor;
1385         struct ti_port_status *data;
1386
1387         dbg("%s - port %d", __FUNCTION__, port->number);
1388
1389         size = sizeof(struct ti_port_status);
1390         data = kmalloc(size, GFP_KERNEL);
1391         if (!data) {
1392                 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1393                 return -ENOMEM;
1394         }
1395
1396         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1397                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1398         if (status) {
1399                 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1400                 goto free_data;
1401         }
1402
1403         dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1404
1405         tport->tp_lsr = data->bLSR;
1406
1407 free_data:
1408         kfree(data);
1409         return status;
1410 }
1411
1412
1413 static int ti_get_serial_info(struct ti_port *tport,
1414         struct serial_struct __user *ret_arg)
1415 {
1416         struct usb_serial_port *port = tport->tp_port;
1417         struct serial_struct ret_serial;
1418
1419         if (!ret_arg)
1420                 return -EFAULT;
1421
1422         memset(&ret_serial, 0, sizeof(ret_serial));
1423
1424         ret_serial.type = PORT_16550A;
1425         ret_serial.line = port->serial->minor;
1426         ret_serial.port = port->number - port->serial->minor;
1427         ret_serial.flags = tport->tp_flags;
1428         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1429         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1430         ret_serial.closing_wait = tport->tp_closing_wait;
1431
1432         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1433                 return -EFAULT;
1434
1435         return 0;
1436 }
1437
1438
1439 static int ti_set_serial_info(struct ti_port *tport,
1440         struct serial_struct __user *new_arg)
1441 {
1442         struct usb_serial_port *port = tport->tp_port;
1443         struct serial_struct new_serial;
1444
1445         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1446                 return -EFAULT;
1447
1448         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1449         if (port->tty)
1450                 port->tty->low_latency =
1451                         (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1452         tport->tp_closing_wait = new_serial.closing_wait;
1453
1454         return 0;
1455 }
1456
1457
1458 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1459 {
1460         struct async_icount *icount;
1461         struct tty_struct *tty;
1462         unsigned long flags;
1463
1464         dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1465
1466         if (msr & TI_MSR_DELTA_MASK) {
1467                 spin_lock_irqsave(&tport->tp_lock, flags);
1468                 icount = &tport->tp_icount;
1469                 if (msr & TI_MSR_DELTA_CTS)
1470                         icount->cts++;
1471                 if (msr & TI_MSR_DELTA_DSR)
1472                         icount->dsr++;
1473                 if (msr & TI_MSR_DELTA_CD)
1474                         icount->dcd++;
1475                 if (msr & TI_MSR_DELTA_RI)
1476                         icount->rng++;
1477                 wake_up_interruptible(&tport->tp_msr_wait);
1478                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1479         }
1480
1481         tport->tp_msr = msr & TI_MSR_MASK;
1482
1483         /* handle CTS flow control */
1484         tty = tport->tp_port->tty;
1485         if (tty && C_CRTSCTS(tty)) {
1486                 if (msr & TI_MSR_CTS) {
1487                         tty->hw_stopped = 0;
1488                         tty_wakeup(tty);
1489                 } else {
1490                         tty->hw_stopped = 1;
1491                 }
1492         }
1493 }
1494
1495
1496 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1497 {
1498         struct ti_device *tdev = tport->tp_tdev;
1499         struct usb_serial_port *port = tport->tp_port;
1500         wait_queue_t wait;
1501         unsigned long flags;
1502
1503         dbg("%s - port %d", __FUNCTION__, port->number);
1504
1505         spin_lock_irqsave(&tport->tp_lock, flags);
1506
1507         /* wait for data to drain from the buffer */
1508         tdev->td_urb_error = 0;
1509         init_waitqueue_entry(&wait, current);
1510         add_wait_queue(&tport->tp_write_wait, &wait);
1511         for (;;) {
1512                 set_current_state(TASK_INTERRUPTIBLE);
1513                 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1514                 || timeout == 0 || signal_pending(current)
1515                 || tdev->td_urb_error
1516                 || !usb_get_intfdata(port->serial->interface))  /* disconnect */
1517                         break;
1518                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1519                 timeout = schedule_timeout(timeout);
1520                 spin_lock_irqsave(&tport->tp_lock, flags);
1521         }
1522         set_current_state(TASK_RUNNING);
1523         remove_wait_queue(&tport->tp_write_wait, &wait);
1524
1525         /* flush any remaining data in the buffer */
1526         if (flush)
1527                 ti_buf_clear(tport->tp_write_buf);
1528
1529         spin_unlock_irqrestore(&tport->tp_lock, flags);
1530
1531         /* wait for data to drain from the device */
1532         /* wait for empty tx register, plus 20 ms */
1533         timeout += jiffies;
1534         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1535         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1536         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1537         && usb_get_intfdata(port->serial->interface)) {  /* not disconnected */
1538                 if (ti_get_lsr(tport))
1539                         break;
1540                 msleep_interruptible(20);
1541         }
1542 }
1543
1544
1545 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1546 {
1547         unsigned long flags;
1548
1549         spin_lock_irqsave(&tport->tp_lock, flags);
1550
1551         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1552                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1553
1554         spin_unlock_irqrestore(&tport->tp_lock, flags);
1555 }
1556
1557
1558 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1559 {
1560         struct urb *urb;
1561         int status = 0;
1562         unsigned long flags;
1563
1564         spin_lock_irqsave(&tport->tp_lock, flags);
1565
1566         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1567                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1568                 urb = tport->tp_port->read_urb;
1569                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1570                 urb->complete = ti_bulk_in_callback;
1571                 urb->context = tport;
1572                 urb->dev = tport->tp_port->serial->dev;
1573                 status = usb_submit_urb(urb, GFP_KERNEL);
1574         } else  {
1575                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1576                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1577         }
1578
1579         return status;
1580 }
1581
1582
1583 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1584         __u16 moduleid, __u16 value, __u8 *data, int size)
1585 {
1586         int status;
1587
1588         status = usb_control_msg(tdev->td_serial->dev,
1589                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1590                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1591                 value, moduleid, data, size, 1000);
1592
1593         if (status == size)
1594                 status = 0;
1595
1596         if (status > 0)
1597                 status = -ECOMM;
1598
1599         return status;
1600 }
1601
1602
1603 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1604         __u16 moduleid, __u16 value, __u8 *data, int size)
1605 {
1606         int status;
1607
1608         status = usb_control_msg(tdev->td_serial->dev,
1609                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1610                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1611                 value, moduleid, data, size, 1000);
1612
1613         if (status == size)
1614                 status = 0;
1615
1616         if (status > 0)
1617                 status = -ECOMM;
1618
1619         return status;
1620 }
1621
1622
1623 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1624         __u8 mask, __u8 byte)
1625 {
1626         int status;
1627         unsigned int size;
1628         struct ti_write_data_bytes *data;
1629         struct device *dev = &tdev->td_serial->dev->dev;
1630
1631         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1632
1633         size = sizeof(struct ti_write_data_bytes) + 2;
1634         data = kmalloc(size, GFP_KERNEL);
1635         if (!data) {
1636                 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1637                 return -ENOMEM;
1638         }
1639
1640         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1641         data->bDataType = TI_RW_DATA_BYTE;
1642         data->bDataCounter = 1;
1643         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1644         data->wBaseAddrLo = cpu_to_be16(addr);
1645         data->bData[0] = mask;
1646         data->bData[1] = byte;
1647
1648         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1649                 (__u8 *)data, size);
1650
1651         if (status < 0)
1652                 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1653
1654         kfree(data);
1655
1656         return status;
1657 }
1658
1659
1660 static int ti_download_firmware(struct ti_device *tdev,
1661         unsigned char *firmware, unsigned int firmware_size)
1662 {
1663         int status = 0;
1664         int buffer_size;
1665         int pos;
1666         int len;
1667         int done;
1668         __u8 cs = 0;
1669         __u8 *buffer;
1670         struct usb_device *dev = tdev->td_serial->dev;
1671         struct ti_firmware_header *header;
1672         unsigned int pipe = usb_sndbulkpipe(dev,
1673                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1674
1675
1676         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1677         buffer = kmalloc(buffer_size, GFP_KERNEL);
1678         if (!buffer) {
1679                 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1680                 return -ENOMEM;
1681         }
1682
1683         memcpy(buffer, firmware, firmware_size);
1684         memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1685
1686         for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1687                 cs = (__u8)(cs + buffer[pos]);
1688
1689         header = (struct ti_firmware_header *)buffer;
1690         header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1691         header->bCheckSum = cs;
1692
1693         dbg("%s - downloading firmware", __FUNCTION__);
1694         for (pos = 0; pos < buffer_size; pos += done) {
1695                 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1696                 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1697                 if (status)
1698                         break;
1699         }
1700
1701         kfree(buffer);
1702
1703         if (status) {
1704                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1705                 return status;
1706         }
1707
1708         dbg("%s - download successful", __FUNCTION__);
1709
1710         return 0;
1711 }
1712
1713
1714 /* Circular Buffer Functions */
1715
1716 /*
1717  * ti_buf_alloc
1718  *
1719  * Allocate a circular buffer and all associated memory.
1720  */
1721
1722 static struct circ_buf *ti_buf_alloc(void)
1723 {
1724         struct circ_buf *cb;
1725
1726         cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1727         if (cb == NULL)
1728                 return NULL;
1729
1730         cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1731         if (cb->buf == NULL) {
1732                 kfree(cb);
1733                 return NULL;
1734         }
1735
1736         ti_buf_clear(cb);
1737
1738         return cb;
1739 }
1740
1741
1742 /*
1743  * ti_buf_free
1744  *
1745  * Free the buffer and all associated memory.
1746  */
1747
1748 static void ti_buf_free(struct circ_buf *cb)
1749 {
1750         kfree(cb->buf);
1751         kfree(cb);
1752 }
1753
1754
1755 /*
1756  * ti_buf_clear
1757  *
1758  * Clear out all data in the circular buffer.
1759  */
1760
1761 static void ti_buf_clear(struct circ_buf *cb)
1762 {
1763         cb->head = cb->tail = 0;
1764 }
1765
1766
1767 /*
1768  * ti_buf_data_avail
1769  *
1770  * Return the number of bytes of data available in the circular
1771  * buffer.
1772  */
1773
1774 static int ti_buf_data_avail(struct circ_buf *cb)
1775 {
1776         return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1777 }
1778
1779
1780 /*
1781  * ti_buf_space_avail
1782  *
1783  * Return the number of bytes of space available in the circular
1784  * buffer.
1785  */
1786
1787 static int ti_buf_space_avail(struct circ_buf *cb)
1788 {
1789         return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1790 }
1791
1792
1793 /*
1794  * ti_buf_put
1795  *
1796  * Copy data data from a user buffer and put it into the circular buffer.
1797  * Restrict to the amount of space available.
1798  *
1799  * Return the number of bytes copied.
1800  */
1801
1802 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1803 {
1804         int c, ret = 0;
1805
1806         while (1) {
1807                 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1808                 if (count < c)
1809                         c = count;
1810                 if (c <= 0)
1811                         break;
1812                 memcpy(cb->buf + cb->head, buf, c);
1813                 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1814                 buf += c;
1815                 count -= c;
1816                 ret += c;
1817         }
1818
1819         return ret;
1820 }
1821
1822
1823 /*
1824  * ti_buf_get
1825  *
1826  * Get data from the circular buffer and copy to the given buffer.
1827  * Restrict to the amount of data available.
1828  *
1829  * Return the number of bytes copied.
1830  */
1831
1832 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1833 {
1834         int c, ret = 0;
1835
1836         while (1) {
1837                 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1838                 if (count < c)
1839                         c = count;
1840                 if (c <= 0)
1841                         break;
1842                 memcpy(buf, cb->buf + cb->tail, c);
1843                 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1844                 buf += c;
1845                 count -= c;
1846                 ret += c;
1847         }
1848
1849         return ret;
1850 }