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