Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
[linux-2.6] / 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
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/firmware.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/circ_buf.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "ti_usb_3410_5052.h"
40
41 /* Defines */
42
43 #define TI_DRIVER_VERSION       "v0.9"
44 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
46
47 #define TI_FIRMWARE_BUF_SIZE    16284
48
49 #define TI_WRITE_BUF_SIZE       1024
50
51 #define TI_TRANSFER_TIMEOUT     2
52
53 #define TI_DEFAULT_LOW_LATENCY  0
54 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
55
56 /* supported setserial flags */
57 #define TI_SET_SERIAL_FLAGS     (ASYNC_LOW_LATENCY)
58
59 /* read urb states */
60 #define TI_READ_URB_RUNNING     0
61 #define TI_READ_URB_STOPPING    1
62 #define TI_READ_URB_STOPPED     2
63
64 #define TI_EXTRA_VID_PID_COUNT  5
65
66
67 /* Structures */
68
69 struct ti_port {
70         int                     tp_is_open;
71         __u8                    tp_msr;
72         __u8                    tp_lsr;
73         __u8                    tp_shadow_mcr;
74         __u8                    tp_uart_mode;   /* 232 or 485 modes */
75         unsigned int            tp_uart_base_addr;
76         int                     tp_flags;
77         int                     tp_closing_wait;/* in .01 secs */
78         struct async_icount     tp_icount;
79         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
80         wait_queue_head_t       tp_write_wait;
81         struct ti_device        *tp_tdev;
82         struct usb_serial_port  *tp_port;
83         spinlock_t              tp_lock;
84         int                     tp_read_urb_state;
85         int                     tp_write_urb_in_use;
86         struct circ_buf         *tp_write_buf;
87 };
88
89 struct ti_device {
90         struct mutex            td_open_close_lock;
91         int                     td_open_port_count;
92         struct usb_serial       *td_serial;
93         int                     td_is_3410;
94         int                     td_urb_error;
95 };
96
97
98 /* Function Declarations */
99
100 static int ti_startup(struct usb_serial *serial);
101 static void ti_shutdown(struct usb_serial *serial);
102 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port,
103                 struct file *file);
104 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
105                 struct file *file);
106 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
107                 const unsigned char *data, int count);
108 static int ti_write_room(struct tty_struct *tty);
109 static int ti_chars_in_buffer(struct tty_struct *tty);
110 static void ti_throttle(struct tty_struct *tty);
111 static void ti_unthrottle(struct tty_struct *tty);
112 static int ti_ioctl(struct tty_struct *tty, struct file *file,
113                 unsigned int cmd, unsigned long arg);
114 static void ti_set_termios(struct tty_struct *tty,
115                 struct usb_serial_port *port, struct ktermios *old_termios);
116 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
117 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
118                 unsigned int set, unsigned int clear);
119 static void ti_break(struct tty_struct *tty, int break_state);
120 static void ti_interrupt_callback(struct urb *urb);
121 static void ti_bulk_in_callback(struct urb *urb);
122 static void ti_bulk_out_callback(struct urb *urb);
123
124 static void ti_recv(struct device *dev, struct tty_struct *tty,
125         unsigned char *data, int length);
126 static void ti_send(struct ti_port *tport);
127 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
128 static int ti_get_lsr(struct ti_port *tport);
129 static int ti_get_serial_info(struct ti_port *tport,
130         struct serial_struct __user *ret_arg);
131 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
132         struct serial_struct __user *new_arg);
133 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
134
135 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
136
137 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
138 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
139
140 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
141         __u16 moduleid, __u16 value, __u8 *data, int size);
142 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
143         __u16 moduleid, __u16 value, __u8 *data, int size);
144
145 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
146         __u8 mask, __u8 byte);
147
148 static int ti_download_firmware(struct ti_device *tdev);
149
150 /* circular buffer */
151 static struct circ_buf *ti_buf_alloc(void);
152 static void ti_buf_free(struct circ_buf *cb);
153 static void ti_buf_clear(struct circ_buf *cb);
154 static int ti_buf_data_avail(struct circ_buf *cb);
155 static int ti_buf_space_avail(struct circ_buf *cb);
156 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
157 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
158
159
160 /* Data */
161
162 /* module parameters */
163 static int debug;
164 static int low_latency = TI_DEFAULT_LOW_LATENCY;
165 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
166 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
167 static unsigned int vendor_3410_count;
168 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
169 static unsigned int product_3410_count;
170 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
171 static unsigned int vendor_5052_count;
172 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
173 static unsigned int product_5052_count;
174
175 /* supported devices */
176 /* the array dimension is the number of default entries plus */
177 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
178 /* null entry */
179 static struct usb_device_id ti_id_table_3410[7+TI_EXTRA_VID_PID_COUNT+1] = {
180         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
181         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
182         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
183         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
184         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
185         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
186         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
187         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
188 };
189
190 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
191         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
192         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
193         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
194         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
195         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
196 };
197
198 static struct usb_device_id ti_id_table_combined[6+2*TI_EXTRA_VID_PID_COUNT+1] = {
199         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
200         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
201         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
202         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
203         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
204         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
205         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
207         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
208         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
209         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
210         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
211         { }
212 };
213
214 static struct usb_driver ti_usb_driver = {
215         .name                   = "ti_usb_3410_5052",
216         .probe                  = usb_serial_probe,
217         .disconnect             = usb_serial_disconnect,
218         .id_table               = ti_id_table_combined,
219         .no_dynamic_id =        1,
220 };
221
222 static struct usb_serial_driver ti_1port_device = {
223         .driver = {
224                 .owner          = THIS_MODULE,
225                 .name           = "ti_usb_3410_5052_1",
226         },
227         .description            = "TI USB 3410 1 port adapter",
228         .usb_driver             = &ti_usb_driver,
229         .id_table               = ti_id_table_3410,
230         .num_ports              = 1,
231         .attach                 = ti_startup,
232         .shutdown               = ti_shutdown,
233         .open                   = ti_open,
234         .close                  = ti_close,
235         .write                  = ti_write,
236         .write_room             = ti_write_room,
237         .chars_in_buffer        = ti_chars_in_buffer,
238         .throttle               = ti_throttle,
239         .unthrottle             = ti_unthrottle,
240         .ioctl                  = ti_ioctl,
241         .set_termios            = ti_set_termios,
242         .tiocmget               = ti_tiocmget,
243         .tiocmset               = ti_tiocmset,
244         .break_ctl              = ti_break,
245         .read_int_callback      = ti_interrupt_callback,
246         .read_bulk_callback     = ti_bulk_in_callback,
247         .write_bulk_callback    = ti_bulk_out_callback,
248 };
249
250 static struct usb_serial_driver ti_2port_device = {
251         .driver = {
252                 .owner          = THIS_MODULE,
253                 .name           = "ti_usb_3410_5052_2",
254         },
255         .description            = "TI USB 5052 2 port adapter",
256         .usb_driver             = &ti_usb_driver,
257         .id_table               = ti_id_table_5052,
258         .num_ports              = 2,
259         .attach                 = ti_startup,
260         .shutdown               = ti_shutdown,
261         .open                   = ti_open,
262         .close                  = ti_close,
263         .write                  = ti_write,
264         .write_room             = ti_write_room,
265         .chars_in_buffer        = ti_chars_in_buffer,
266         .throttle               = ti_throttle,
267         .unthrottle             = ti_unthrottle,
268         .ioctl                  = ti_ioctl,
269         .set_termios            = ti_set_termios,
270         .tiocmget               = ti_tiocmget,
271         .tiocmset               = ti_tiocmset,
272         .break_ctl              = ti_break,
273         .read_int_callback      = ti_interrupt_callback,
274         .read_bulk_callback     = ti_bulk_in_callback,
275         .write_bulk_callback    = ti_bulk_out_callback,
276 };
277
278
279 /* Module */
280
281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
283 MODULE_VERSION(TI_DRIVER_VERSION);
284 MODULE_LICENSE("GPL");
285
286 MODULE_FIRMWARE("ti_3410.fw");
287 MODULE_FIRMWARE("ti_5052.fw");
288 MODULE_FIRMWARE("mts_cdma.fw");
289 MODULE_FIRMWARE("mts_gsm.fw");
290 MODULE_FIRMWARE("mts_edge.fw");
291
292 module_param(debug, bool, S_IRUGO | S_IWUSR);
293 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
294
295 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
296 MODULE_PARM_DESC(low_latency,
297                 "TTY low_latency flag, 0=off, 1=on, default is off");
298
299 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
300 MODULE_PARM_DESC(closing_wait,
301     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
302
303 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
304 MODULE_PARM_DESC(vendor_3410,
305                 "Vendor ids for 3410 based devices, 1-5 short integers");
306 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
307 MODULE_PARM_DESC(product_3410,
308                 "Product ids for 3410 based devices, 1-5 short integers");
309 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
310 MODULE_PARM_DESC(vendor_5052,
311                 "Vendor ids for 5052 based devices, 1-5 short integers");
312 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
313 MODULE_PARM_DESC(product_5052,
314                 "Product ids for 5052 based devices, 1-5 short integers");
315
316 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
317
318
319 /* Functions */
320
321 static int __init ti_init(void)
322 {
323         int i, j, c;
324         int ret;
325
326         /* insert extra vendor and product ids */
327         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
328         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
329         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
330                 ti_id_table_3410[j].idVendor = vendor_3410[i];
331                 ti_id_table_3410[j].idProduct = product_3410[i];
332                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
333                 ti_id_table_combined[c].idVendor = vendor_3410[i];
334                 ti_id_table_combined[c].idProduct = product_3410[i];
335                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
336         }
337         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
338         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
339                 ti_id_table_5052[j].idVendor = vendor_5052[i];
340                 ti_id_table_5052[j].idProduct = product_5052[i];
341                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
342                 ti_id_table_combined[c].idVendor = vendor_5052[i];
343                 ti_id_table_combined[c].idProduct = product_5052[i];
344                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
345         }
346
347         ret = usb_serial_register(&ti_1port_device);
348         if (ret)
349                 goto failed_1port;
350         ret = usb_serial_register(&ti_2port_device);
351         if (ret)
352                 goto failed_2port;
353
354         ret = usb_register(&ti_usb_driver);
355         if (ret)
356                 goto failed_usb;
357
358         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
359                TI_DRIVER_DESC "\n");
360
361         return 0;
362
363 failed_usb:
364         usb_serial_deregister(&ti_2port_device);
365 failed_2port:
366         usb_serial_deregister(&ti_1port_device);
367 failed_1port:
368         return ret;
369 }
370
371
372 static void __exit ti_exit(void)
373 {
374         usb_serial_deregister(&ti_1port_device);
375         usb_serial_deregister(&ti_2port_device);
376         usb_deregister(&ti_usb_driver);
377 }
378
379
380 module_init(ti_init);
381 module_exit(ti_exit);
382
383
384 static int ti_startup(struct usb_serial *serial)
385 {
386         struct ti_device *tdev;
387         struct ti_port *tport;
388         struct usb_device *dev = serial->dev;
389         int status;
390         int i;
391
392
393         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
394             __func__, le16_to_cpu(dev->descriptor.idProduct),
395             dev->descriptor.bNumConfigurations,
396             dev->actconfig->desc.bConfigurationValue);
397
398         /* create device structure */
399         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
400         if (tdev == NULL) {
401                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
402                 return -ENOMEM;
403         }
404         mutex_init(&tdev->td_open_close_lock);
405         tdev->td_serial = serial;
406         usb_set_serial_data(serial, tdev);
407
408         /* determine device type */
409         if (usb_match_id(serial->interface, ti_id_table_3410))
410                 tdev->td_is_3410 = 1;
411         dbg("%s - device type is %s", __func__,
412                                 tdev->td_is_3410 ? "3410" : "5052");
413
414         /* if we have only 1 configuration, download firmware */
415         if (dev->descriptor.bNumConfigurations == 1) {
416                 if ((status = ti_download_firmware(tdev)) != 0)
417                         goto free_tdev;
418
419                 /* 3410 must be reset, 5052 resets itself */
420                 if (tdev->td_is_3410) {
421                         msleep_interruptible(100);
422                         usb_reset_device(dev);
423                 }
424
425                 status = -ENODEV;
426                 goto free_tdev;
427         }
428
429         /* the second configuration must be set */
430         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
431                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
432                 status = status ? status : -ENODEV;
433                 goto free_tdev;
434         }
435
436         /* set up port structures */
437         for (i = 0; i < serial->num_ports; ++i) {
438                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
439                 if (tport == NULL) {
440                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
441                         status = -ENOMEM;
442                         goto free_tports;
443                 }
444                 spin_lock_init(&tport->tp_lock);
445                 tport->tp_uart_base_addr = (i == 0 ?
446                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
447                 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
448                 tport->tp_closing_wait = closing_wait;
449                 init_waitqueue_head(&tport->tp_msr_wait);
450                 init_waitqueue_head(&tport->tp_write_wait);
451                 tport->tp_write_buf = ti_buf_alloc();
452                 if (tport->tp_write_buf == NULL) {
453                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
454                         kfree(tport);
455                         status = -ENOMEM;
456                         goto free_tports;
457                 }
458                 tport->tp_port = serial->port[i];
459                 tport->tp_tdev = tdev;
460                 usb_set_serial_port_data(serial->port[i], tport);
461                 tport->tp_uart_mode = 0;        /* default is RS232 */
462         }
463
464         return 0;
465
466 free_tports:
467         for (--i; i >= 0; --i) {
468                 tport = usb_get_serial_port_data(serial->port[i]);
469                 ti_buf_free(tport->tp_write_buf);
470                 kfree(tport);
471                 usb_set_serial_port_data(serial->port[i], NULL);
472         }
473 free_tdev:
474         kfree(tdev);
475         usb_set_serial_data(serial, NULL);
476         return status;
477 }
478
479
480 static void ti_shutdown(struct usb_serial *serial)
481 {
482         int i;
483         struct ti_device *tdev = usb_get_serial_data(serial);
484         struct ti_port *tport;
485
486         dbg("%s", __func__);
487
488         for (i = 0; i < serial->num_ports; ++i) {
489                 tport = usb_get_serial_port_data(serial->port[i]);
490                 if (tport) {
491                         ti_buf_free(tport->tp_write_buf);
492                         kfree(tport);
493                         usb_set_serial_port_data(serial->port[i], NULL);
494                 }
495         }
496
497         kfree(tdev);
498         usb_set_serial_data(serial, NULL);
499 }
500
501
502 static int ti_open(struct tty_struct *tty,
503                         struct usb_serial_port *port, struct file *file)
504 {
505         struct ti_port *tport = usb_get_serial_port_data(port);
506         struct ti_device *tdev;
507         struct usb_device *dev;
508         struct urb *urb;
509         int port_number;
510         int status;
511         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
512                              TI_PIPE_TIMEOUT_ENABLE |
513                              (TI_TRANSFER_TIMEOUT << 2));
514
515         dbg("%s - port %d", __func__, port->number);
516
517         if (tport == NULL)
518                 return -ENODEV;
519
520         dev = port->serial->dev;
521         tdev = tport->tp_tdev;
522
523         /* only one open on any port on a device at a time */
524         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
525                 return -ERESTARTSYS;
526
527         if (tty)
528                 tty->low_latency =
529                                 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
530
531         port_number = port->number - port->serial->minor;
532
533         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
534
535         tport->tp_msr = 0;
536         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
537
538         /* start interrupt urb the first time a port is opened on this device */
539         if (tdev->td_open_port_count == 0) {
540                 dbg("%s - start interrupt in urb", __func__);
541                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
542                 if (!urb) {
543                         dev_err(&port->dev, "%s - no interrupt urb\n",
544                                                                 __func__);
545                         status = -EINVAL;
546                         goto release_lock;
547                 }
548                 urb->complete = ti_interrupt_callback;
549                 urb->context = tdev;
550                 urb->dev = dev;
551                 status = usb_submit_urb(urb, GFP_KERNEL);
552                 if (status) {
553                         dev_err(&port->dev,
554                                 "%s - submit interrupt urb failed, %d\n",
555                                         __func__, status);
556                         goto release_lock;
557                 }
558         }
559
560         if (tty)
561                 ti_set_termios(tty, port, tty->termios);
562
563         dbg("%s - sending TI_OPEN_PORT", __func__);
564         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
565                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
566         if (status) {
567                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
568                                                         __func__, status);
569                 goto unlink_int_urb;
570         }
571
572         dbg("%s - sending TI_START_PORT", __func__);
573         status = ti_command_out_sync(tdev, TI_START_PORT,
574                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
575         if (status) {
576                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
577                                                         __func__, status);
578                 goto unlink_int_urb;
579         }
580
581         dbg("%s - sending TI_PURGE_PORT", __func__);
582         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
583                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
584         if (status) {
585                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
586                                                         __func__, status);
587                 goto unlink_int_urb;
588         }
589         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
590                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
591         if (status) {
592                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
593                                                         __func__, status);
594                 goto unlink_int_urb;
595         }
596
597         /* reset the data toggle on the bulk endpoints to work around bug in
598          * host controllers where things get out of sync some times */
599         usb_clear_halt(dev, port->write_urb->pipe);
600         usb_clear_halt(dev, port->read_urb->pipe);
601
602         if (tty)
603                 ti_set_termios(tty, port, tty->termios);
604
605         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
606         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
607                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
608         if (status) {
609                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
610                                                         __func__, status);
611                 goto unlink_int_urb;
612         }
613
614         dbg("%s - sending TI_START_PORT (2)", __func__);
615         status = ti_command_out_sync(tdev, TI_START_PORT,
616                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
617         if (status) {
618                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
619                                                         __func__, status);
620                 goto unlink_int_urb;
621         }
622
623         /* start read urb */
624         dbg("%s - start read urb", __func__);
625         urb = port->read_urb;
626         if (!urb) {
627                 dev_err(&port->dev, "%s - no read urb\n", __func__);
628                 status = -EINVAL;
629                 goto unlink_int_urb;
630         }
631         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
632         urb->complete = ti_bulk_in_callback;
633         urb->context = tport;
634         urb->dev = dev;
635         status = usb_submit_urb(urb, GFP_KERNEL);
636         if (status) {
637                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
638                                                         __func__, status);
639                 goto unlink_int_urb;
640         }
641
642         tport->tp_is_open = 1;
643         ++tdev->td_open_port_count;
644
645         goto release_lock;
646
647 unlink_int_urb:
648         if (tdev->td_open_port_count == 0)
649                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
650 release_lock:
651         mutex_unlock(&tdev->td_open_close_lock);
652         dbg("%s - exit %d", __func__, status);
653         return status;
654 }
655
656
657 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
658                                                         struct file *file)
659 {
660         struct ti_device *tdev;
661         struct ti_port *tport;
662         int port_number;
663         int status;
664         int do_unlock;
665
666         dbg("%s - port %d", __func__, port->number);
667
668         tdev = usb_get_serial_data(port->serial);
669         tport = usb_get_serial_port_data(port);
670         if (tdev == NULL || tport == NULL)
671                 return;
672
673         tport->tp_is_open = 0;
674
675         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
676
677         usb_kill_urb(port->read_urb);
678         usb_kill_urb(port->write_urb);
679         tport->tp_write_urb_in_use = 0;
680
681         port_number = port->number - port->serial->minor;
682
683         dbg("%s - sending TI_CLOSE_PORT", __func__);
684         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
685                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
686         if (status)
687                 dev_err(&port->dev,
688                         "%s - cannot send close port command, %d\n"
689                                                         , __func__, status);
690
691         /* if mutex_lock is interrupted, continue anyway */
692         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
693         --tport->tp_tdev->td_open_port_count;
694         if (tport->tp_tdev->td_open_port_count <= 0) {
695                 /* last port is closed, shut down interrupt urb */
696                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
697                 tport->tp_tdev->td_open_port_count = 0;
698         }
699         if (do_unlock)
700                 mutex_unlock(&tdev->td_open_close_lock);
701
702         dbg("%s - exit", __func__);
703 }
704
705
706 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
707                         const unsigned char *data, int count)
708 {
709         struct ti_port *tport = usb_get_serial_port_data(port);
710         unsigned long flags;
711
712         dbg("%s - port %d", __func__, port->number);
713
714         if (count == 0) {
715                 dbg("%s - write request of 0 bytes", __func__);
716                 return 0;
717         }
718
719         if (tport == NULL || !tport->tp_is_open)
720                 return -ENODEV;
721
722         spin_lock_irqsave(&tport->tp_lock, flags);
723         count = ti_buf_put(tport->tp_write_buf, data, count);
724         spin_unlock_irqrestore(&tport->tp_lock, flags);
725
726         ti_send(tport);
727
728         return count;
729 }
730
731
732 static int ti_write_room(struct tty_struct *tty)
733 {
734         struct usb_serial_port *port = tty->driver_data;
735         struct ti_port *tport = usb_get_serial_port_data(port);
736         int room = 0;
737         unsigned long flags;
738
739         dbg("%s - port %d", __func__, port->number);
740
741         if (tport == NULL)
742                 return -ENODEV;
743
744         spin_lock_irqsave(&tport->tp_lock, flags);
745         room = ti_buf_space_avail(tport->tp_write_buf);
746         spin_unlock_irqrestore(&tport->tp_lock, flags);
747
748         dbg("%s - returns %d", __func__, room);
749         return room;
750 }
751
752
753 static int ti_chars_in_buffer(struct tty_struct *tty)
754 {
755         struct usb_serial_port *port = tty->driver_data;
756         struct ti_port *tport = usb_get_serial_port_data(port);
757         int chars = 0;
758         unsigned long flags;
759
760         dbg("%s - port %d", __func__, port->number);
761
762         if (tport == NULL)
763                 return -ENODEV;
764
765         spin_lock_irqsave(&tport->tp_lock, flags);
766         chars = ti_buf_data_avail(tport->tp_write_buf);
767         spin_unlock_irqrestore(&tport->tp_lock, flags);
768
769         dbg("%s - returns %d", __func__, chars);
770         return chars;
771 }
772
773
774 static void ti_throttle(struct tty_struct *tty)
775 {
776         struct usb_serial_port *port = tty->driver_data;
777         struct ti_port *tport = usb_get_serial_port_data(port);
778
779         dbg("%s - port %d", __func__, port->number);
780
781         if (tport == NULL)
782                 return;
783
784         if (I_IXOFF(tty) || C_CRTSCTS(tty))
785                 ti_stop_read(tport, tty);
786
787 }
788
789
790 static void ti_unthrottle(struct tty_struct *tty)
791 {
792         struct usb_serial_port *port = tty->driver_data;
793         struct ti_port *tport = usb_get_serial_port_data(port);
794         int status;
795
796         dbg("%s - port %d", __func__, port->number);
797
798         if (tport == NULL)
799                 return;
800
801         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
802                 status = ti_restart_read(tport, tty);
803                 if (status)
804                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
805                                                         __func__, status);
806         }
807 }
808
809
810 static int ti_ioctl(struct tty_struct *tty, struct file *file,
811         unsigned int cmd, unsigned long arg)
812 {
813         struct usb_serial_port *port = tty->driver_data;
814         struct ti_port *tport = usb_get_serial_port_data(port);
815         struct async_icount cnow;
816         struct async_icount cprev;
817
818         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
819
820         if (tport == NULL)
821                 return -ENODEV;
822
823         switch (cmd) {
824         case TIOCGSERIAL:
825                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
826                 return ti_get_serial_info(tport,
827                                 (struct serial_struct __user *)arg);
828         case TIOCSSERIAL:
829                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
830                 return ti_set_serial_info(tty, tport,
831                                 (struct serial_struct __user *)arg);
832         case TIOCMIWAIT:
833                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
834                 cprev = tport->tp_icount;
835                 while (1) {
836                         interruptible_sleep_on(&tport->tp_msr_wait);
837                         if (signal_pending(current))
838                                 return -ERESTARTSYS;
839                         cnow = tport->tp_icount;
840                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
841                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
842                                 return -EIO; /* no change => error */
843                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
844                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
845                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
846                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
847                                 return 0;
848                         cprev = cnow;
849                 }
850                 break;
851         case TIOCGICOUNT:
852                 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
853                                 __func__, port->number,
854                                 tport->tp_icount.rx, tport->tp_icount.tx);
855                 if (copy_to_user((void __user *)arg, &tport->tp_icount,
856                                         sizeof(tport->tp_icount)))
857                         return -EFAULT;
858                 return 0;
859         }
860         return -ENOIOCTLCMD;
861 }
862
863
864 static void ti_set_termios(struct tty_struct *tty,
865                 struct usb_serial_port *port, struct ktermios *old_termios)
866 {
867         struct ti_port *tport = usb_get_serial_port_data(port);
868         struct ti_uart_config *config;
869         tcflag_t cflag, iflag;
870         int baud;
871         int status;
872         int port_number = port->number - port->serial->minor;
873         unsigned int mcr;
874
875         dbg("%s - port %d", __func__, port->number);
876
877         cflag = tty->termios->c_cflag;
878         iflag = tty->termios->c_iflag;
879
880         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
881         dbg("%s - old clfag %08x, old iflag %08x", __func__,
882                                 old_termios->c_cflag, old_termios->c_iflag);
883
884         if (tport == NULL)
885                 return;
886
887         config = kmalloc(sizeof(*config), GFP_KERNEL);
888         if (!config) {
889                 dev_err(&port->dev, "%s - out of memory\n", __func__);
890                 return;
891         }
892
893         config->wFlags = 0;
894
895         /* these flags must be set */
896         config->wFlags |= TI_UART_ENABLE_MS_INTS;
897         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
898         config->bUartMode = (__u8)(tport->tp_uart_mode);
899
900         switch (cflag & CSIZE) {
901         case CS5:
902                     config->bDataBits = TI_UART_5_DATA_BITS;
903                     break;
904         case CS6:
905                     config->bDataBits = TI_UART_6_DATA_BITS;
906                     break;
907         case CS7:
908                     config->bDataBits = TI_UART_7_DATA_BITS;
909                     break;
910         default:
911         case CS8:
912                     config->bDataBits = TI_UART_8_DATA_BITS;
913                     break;
914         }
915
916         /* CMSPAR isn't supported by this driver */
917         tty->termios->c_cflag &= ~CMSPAR;
918
919         if (cflag & PARENB) {
920                 if (cflag & PARODD) {
921                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
922                         config->bParity = TI_UART_ODD_PARITY;
923                 } else {
924                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
925                         config->bParity = TI_UART_EVEN_PARITY;
926                 }
927         } else {
928                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
929                 config->bParity = TI_UART_NO_PARITY;
930         }
931
932         if (cflag & CSTOPB)
933                 config->bStopBits = TI_UART_2_STOP_BITS;
934         else
935                 config->bStopBits = TI_UART_1_STOP_BITS;
936
937         if (cflag & CRTSCTS) {
938                 /* RTS flow control must be off to drop RTS for baud rate B0 */
939                 if ((cflag & CBAUD) != B0)
940                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
941                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
942         } else {
943                 tty->hw_stopped = 0;
944                 ti_restart_read(tport, tty);
945         }
946
947         if (I_IXOFF(tty) || I_IXON(tty)) {
948                 config->cXon  = START_CHAR(tty);
949                 config->cXoff = STOP_CHAR(tty);
950
951                 if (I_IXOFF(tty))
952                         config->wFlags |= TI_UART_ENABLE_X_IN;
953                 else
954                         ti_restart_read(tport, tty);
955
956                 if (I_IXON(tty))
957                         config->wFlags |= TI_UART_ENABLE_X_OUT;
958         }
959
960         baud = tty_get_baud_rate(tty);
961         if (!baud)
962                 baud = 9600;
963         if (tport->tp_tdev->td_is_3410)
964                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
965         else
966                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
967
968         /* FIXME: Should calculate resulting baud here and report it back */
969         if ((cflag & CBAUD) != B0)
970                 tty_encode_baud_rate(tty, baud, baud);
971
972         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
973         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
974
975         cpu_to_be16s(&config->wBaudRate);
976         cpu_to_be16s(&config->wFlags);
977
978         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
979                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
980                 sizeof(*config));
981         if (status)
982                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
983                                         __func__, port_number, status);
984
985         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
986         mcr = tport->tp_shadow_mcr;
987         /* if baud rate is B0, clear RTS and DTR */
988         if ((cflag & CBAUD) == B0)
989                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
990         status = ti_set_mcr(tport, mcr);
991         if (status)
992                 dev_err(&port->dev,
993                         "%s - cannot set modem control on port %d, %d\n",
994                                                 __func__, port_number, status);
995
996         kfree(config);
997 }
998
999
1000 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
1001 {
1002         struct usb_serial_port *port = tty->driver_data;
1003         struct ti_port *tport = usb_get_serial_port_data(port);
1004         unsigned int result;
1005         unsigned int msr;
1006         unsigned int mcr;
1007         unsigned long flags;
1008
1009         dbg("%s - port %d", __func__, port->number);
1010
1011         if (tport == NULL)
1012                 return -ENODEV;
1013
1014         spin_lock_irqsave(&tport->tp_lock, flags);
1015         msr = tport->tp_msr;
1016         mcr = tport->tp_shadow_mcr;
1017         spin_unlock_irqrestore(&tport->tp_lock, flags);
1018
1019         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1020                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1021                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1022                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1023                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1024                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1025                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1026
1027         dbg("%s - 0x%04X", __func__, result);
1028
1029         return result;
1030 }
1031
1032
1033 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1034         unsigned int set, unsigned int clear)
1035 {
1036         struct usb_serial_port *port = tty->driver_data;
1037         struct ti_port *tport = usb_get_serial_port_data(port);
1038         unsigned int mcr;
1039         unsigned long flags;
1040
1041         dbg("%s - port %d", __func__, port->number);
1042
1043         if (tport == NULL)
1044                 return -ENODEV;
1045
1046         spin_lock_irqsave(&tport->tp_lock, flags);
1047         mcr = tport->tp_shadow_mcr;
1048
1049         if (set & TIOCM_RTS)
1050                 mcr |= TI_MCR_RTS;
1051         if (set & TIOCM_DTR)
1052                 mcr |= TI_MCR_DTR;
1053         if (set & TIOCM_LOOP)
1054                 mcr |= TI_MCR_LOOP;
1055
1056         if (clear & TIOCM_RTS)
1057                 mcr &= ~TI_MCR_RTS;
1058         if (clear & TIOCM_DTR)
1059                 mcr &= ~TI_MCR_DTR;
1060         if (clear & TIOCM_LOOP)
1061                 mcr &= ~TI_MCR_LOOP;
1062         spin_unlock_irqrestore(&tport->tp_lock, flags);
1063
1064         return ti_set_mcr(tport, mcr);
1065 }
1066
1067
1068 static void ti_break(struct tty_struct *tty, int break_state)
1069 {
1070         struct usb_serial_port *port = tty->driver_data;
1071         struct ti_port *tport = usb_get_serial_port_data(port);
1072         int status;
1073
1074         dbg("%s - state = %d", __func__, break_state);
1075
1076         if (tport == NULL)
1077                 return;
1078
1079         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1080
1081         status = ti_write_byte(tport->tp_tdev,
1082                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1083                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1084
1085         if (status)
1086                 dbg("%s - error setting break, %d", __func__, status);
1087 }
1088
1089
1090 static void ti_interrupt_callback(struct urb *urb)
1091 {
1092         struct ti_device *tdev = urb->context;
1093         struct usb_serial_port *port;
1094         struct usb_serial *serial = tdev->td_serial;
1095         struct ti_port *tport;
1096         struct device *dev = &urb->dev->dev;
1097         unsigned char *data = urb->transfer_buffer;
1098         int length = urb->actual_length;
1099         int port_number;
1100         int function;
1101         int status = urb->status;
1102         int retval;
1103         __u8 msr;
1104
1105         dbg("%s", __func__);
1106
1107         switch (status) {
1108         case 0:
1109                 break;
1110         case -ECONNRESET:
1111         case -ENOENT:
1112         case -ESHUTDOWN:
1113                 dbg("%s - urb shutting down, %d", __func__, status);
1114                 tdev->td_urb_error = 1;
1115                 return;
1116         default:
1117                 dev_err(dev, "%s - nonzero urb status, %d\n",
1118                         __func__, status);
1119                 tdev->td_urb_error = 1;
1120                 goto exit;
1121         }
1122
1123         if (length != 2) {
1124                 dbg("%s - bad packet size, %d", __func__, length);
1125                 goto exit;
1126         }
1127
1128         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1129                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1130                 goto exit;
1131         }
1132
1133         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1134         function = TI_GET_FUNC_FROM_CODE(data[0]);
1135
1136         dbg("%s - port_number %d, function %d, data 0x%02X",
1137                                 __func__, port_number, function, data[1]);
1138
1139         if (port_number >= serial->num_ports) {
1140                 dev_err(dev, "%s - bad port number, %d\n",
1141                                                 __func__, port_number);
1142                 goto exit;
1143         }
1144
1145         port = serial->port[port_number];
1146
1147         tport = usb_get_serial_port_data(port);
1148         if (!tport)
1149                 goto exit;
1150
1151         switch (function) {
1152         case TI_CODE_DATA_ERROR:
1153                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1154                                         __func__, port_number, data[1]);
1155                 break;
1156
1157         case TI_CODE_MODEM_STATUS:
1158                 msr = data[1];
1159                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1160                 ti_handle_new_msr(tport, msr);
1161                 break;
1162
1163         default:
1164                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1165                                                         __func__, data[1]);
1166                 break;
1167         }
1168
1169 exit:
1170         retval = usb_submit_urb(urb, GFP_ATOMIC);
1171         if (retval)
1172                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1173                         __func__, retval);
1174 }
1175
1176
1177 static void ti_bulk_in_callback(struct urb *urb)
1178 {
1179         struct ti_port *tport = urb->context;
1180         struct usb_serial_port *port = tport->tp_port;
1181         struct device *dev = &urb->dev->dev;
1182         int status = urb->status;
1183         int retval = 0;
1184         struct tty_struct *tty;
1185
1186         dbg("%s", __func__);
1187
1188         switch (status) {
1189         case 0:
1190                 break;
1191         case -ECONNRESET:
1192         case -ENOENT:
1193         case -ESHUTDOWN:
1194                 dbg("%s - urb shutting down, %d", __func__, status);
1195                 tport->tp_tdev->td_urb_error = 1;
1196                 wake_up_interruptible(&tport->tp_write_wait);
1197                 return;
1198         default:
1199                 dev_err(dev, "%s - nonzero urb status, %d\n",
1200                         __func__, status);
1201                 tport->tp_tdev->td_urb_error = 1;
1202                 wake_up_interruptible(&tport->tp_write_wait);
1203         }
1204
1205         if (status == -EPIPE)
1206                 goto exit;
1207
1208         if (status) {
1209                 dev_err(dev, "%s - stopping read!\n", __func__);
1210                 return;
1211         }
1212
1213         tty = tty_port_tty_get(&port->port);
1214         if (tty && urb->actual_length) {
1215                 usb_serial_debug_data(debug, dev, __func__,
1216                         urb->actual_length, urb->transfer_buffer);
1217
1218                 if (!tport->tp_is_open)
1219                         dbg("%s - port closed, dropping data", __func__);
1220                 else
1221                         ti_recv(&urb->dev->dev, tty,
1222                                                 urb->transfer_buffer,
1223                                                 urb->actual_length);
1224
1225                 spin_lock(&tport->tp_lock);
1226                 tport->tp_icount.rx += urb->actual_length;
1227                 spin_unlock(&tport->tp_lock);
1228                 tty_kref_put(tty);
1229         }
1230
1231 exit:
1232         /* continue to read unless stopping */
1233         spin_lock(&tport->tp_lock);
1234         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1235                 urb->dev = port->serial->dev;
1236                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1237         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1238                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1239         }
1240         spin_unlock(&tport->tp_lock);
1241         if (retval)
1242                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1243                         __func__, retval);
1244 }
1245
1246
1247 static void ti_bulk_out_callback(struct urb *urb)
1248 {
1249         struct ti_port *tport = urb->context;
1250         struct usb_serial_port *port = tport->tp_port;
1251         struct device *dev = &urb->dev->dev;
1252         int status = urb->status;
1253
1254         dbg("%s - port %d", __func__, port->number);
1255
1256         tport->tp_write_urb_in_use = 0;
1257
1258         switch (status) {
1259         case 0:
1260                 break;
1261         case -ECONNRESET:
1262         case -ENOENT:
1263         case -ESHUTDOWN:
1264                 dbg("%s - urb shutting down, %d", __func__, status);
1265                 tport->tp_tdev->td_urb_error = 1;
1266                 wake_up_interruptible(&tport->tp_write_wait);
1267                 return;
1268         default:
1269                 dev_err(dev, "%s - nonzero urb status, %d\n",
1270                         __func__, status);
1271                 tport->tp_tdev->td_urb_error = 1;
1272                 wake_up_interruptible(&tport->tp_write_wait);
1273         }
1274
1275         /* send any buffered data */
1276         ti_send(tport);
1277 }
1278
1279
1280 static void ti_recv(struct device *dev, struct tty_struct *tty,
1281         unsigned char *data, int length)
1282 {
1283         int cnt;
1284
1285         do {
1286                 cnt = tty_buffer_request_room(tty, length);
1287                 if (cnt < length) {
1288                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1289                                                 __func__, 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 = tty_port_tty_get(&port->port); /* FIXME */
1307         unsigned long flags;
1308
1309
1310         dbg("%s - port %d", __func__, port->number);
1311
1312         spin_lock_irqsave(&tport->tp_lock, flags);
1313
1314         if (tport->tp_write_urb_in_use)
1315                 goto unlock;
1316
1317         count = ti_buf_get(tport->tp_write_buf,
1318                                 port->write_urb->transfer_buffer,
1319                                 port->bulk_out_size);
1320
1321         if (count == 0)
1322                 goto unlock;
1323
1324         tport->tp_write_urb_in_use = 1;
1325
1326         spin_unlock_irqrestore(&tport->tp_lock, flags);
1327
1328         usb_serial_debug_data(debug, &port->dev, __func__, count,
1329                                         port->write_urb->transfer_buffer);
1330
1331         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1332                            usb_sndbulkpipe(port->serial->dev,
1333                                             port->bulk_out_endpointAddress),
1334                            port->write_urb->transfer_buffer, count,
1335                            ti_bulk_out_callback, tport);
1336
1337         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1338         if (result) {
1339                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1340                                                         __func__, result);
1341                 tport->tp_write_urb_in_use = 0;
1342                 /* TODO: reschedule ti_send */
1343         } else {
1344                 spin_lock_irqsave(&tport->tp_lock, flags);
1345                 tport->tp_icount.tx += count;
1346                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1347         }
1348
1349         /* more room in the buffer for new writes, wakeup */
1350         if (tty)
1351                 tty_wakeup(tty);
1352         tty_kref_put(tty);
1353         wake_up_interruptible(&tport->tp_write_wait);
1354         return;
1355 unlock:
1356         spin_unlock_irqrestore(&tport->tp_lock, flags);
1357         tty_kref_put(tty);
1358         return;
1359 }
1360
1361
1362 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1363 {
1364         unsigned long flags;
1365         int status;
1366
1367         status = ti_write_byte(tport->tp_tdev,
1368                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1369                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1370
1371         spin_lock_irqsave(&tport->tp_lock, flags);
1372         if (!status)
1373                 tport->tp_shadow_mcr = mcr;
1374         spin_unlock_irqrestore(&tport->tp_lock, flags);
1375
1376         return status;
1377 }
1378
1379
1380 static int ti_get_lsr(struct ti_port *tport)
1381 {
1382         int size, status;
1383         struct ti_device *tdev = tport->tp_tdev;
1384         struct usb_serial_port *port = tport->tp_port;
1385         int port_number = port->number - port->serial->minor;
1386         struct ti_port_status *data;
1387
1388         dbg("%s - port %d", __func__, port->number);
1389
1390         size = sizeof(struct ti_port_status);
1391         data = kmalloc(size, GFP_KERNEL);
1392         if (!data) {
1393                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1394                 return -ENOMEM;
1395         }
1396
1397         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1398                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1399         if (status) {
1400                 dev_err(&port->dev,
1401                         "%s - get port status command failed, %d\n",
1402                                                         __func__, status);
1403                 goto free_data;
1404         }
1405
1406         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1407
1408         tport->tp_lsr = data->bLSR;
1409
1410 free_data:
1411         kfree(data);
1412         return status;
1413 }
1414
1415
1416 static int ti_get_serial_info(struct ti_port *tport,
1417         struct serial_struct __user *ret_arg)
1418 {
1419         struct usb_serial_port *port = tport->tp_port;
1420         struct serial_struct ret_serial;
1421
1422         if (!ret_arg)
1423                 return -EFAULT;
1424
1425         memset(&ret_serial, 0, sizeof(ret_serial));
1426
1427         ret_serial.type = PORT_16550A;
1428         ret_serial.line = port->serial->minor;
1429         ret_serial.port = port->number - port->serial->minor;
1430         ret_serial.flags = tport->tp_flags;
1431         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1432         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1433         ret_serial.closing_wait = tport->tp_closing_wait;
1434
1435         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1436                 return -EFAULT;
1437
1438         return 0;
1439 }
1440
1441
1442 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1443         struct serial_struct __user *new_arg)
1444 {
1445         struct serial_struct new_serial;
1446
1447         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1448                 return -EFAULT;
1449
1450         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1451         tty->low_latency = (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", __func__, 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 = tty_port_tty_get(&tport->tp_port->port);
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         tty_kref_put(tty);
1494 }
1495
1496
1497 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1498 {
1499         struct ti_device *tdev = tport->tp_tdev;
1500         struct usb_serial_port *port = tport->tp_port;
1501         wait_queue_t wait;
1502
1503         dbg("%s - port %d", __func__, port->number);
1504
1505         spin_lock_irq(&tport->tp_lock);
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                 || port->serial->disconnected)  /* disconnect */
1517                         break;
1518                 spin_unlock_irq(&tport->tp_lock);
1519                 timeout = schedule_timeout(timeout);
1520                 spin_lock_irq(&tport->tp_lock);
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_irq(&tport->tp_lock);
1530
1531         mutex_lock(&port->serial->disc_mutex);
1532         /* wait for data to drain from the device */
1533         /* wait for empty tx register, plus 20 ms */
1534         timeout += jiffies;
1535         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1536         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1537         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1538         && !port->serial->disconnected) {
1539                 if (ti_get_lsr(tport))
1540                         break;
1541                 mutex_unlock(&port->serial->disc_mutex);
1542                 msleep_interruptible(20);
1543                 mutex_lock(&port->serial->disc_mutex);
1544         }
1545         mutex_unlock(&port->serial->disc_mutex);
1546 }
1547
1548
1549 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1550 {
1551         unsigned long flags;
1552
1553         spin_lock_irqsave(&tport->tp_lock, flags);
1554
1555         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1556                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1557
1558         spin_unlock_irqrestore(&tport->tp_lock, flags);
1559 }
1560
1561
1562 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1563 {
1564         struct urb *urb;
1565         int status = 0;
1566         unsigned long flags;
1567
1568         spin_lock_irqsave(&tport->tp_lock, flags);
1569
1570         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1571                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1572                 urb = tport->tp_port->read_urb;
1573                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1574                 urb->complete = ti_bulk_in_callback;
1575                 urb->context = tport;
1576                 urb->dev = tport->tp_port->serial->dev;
1577                 status = usb_submit_urb(urb, GFP_KERNEL);
1578         } else  {
1579                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1580                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1581         }
1582
1583         return status;
1584 }
1585
1586
1587 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1588         __u16 moduleid, __u16 value, __u8 *data, int size)
1589 {
1590         int status;
1591
1592         status = usb_control_msg(tdev->td_serial->dev,
1593                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1594                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1595                 value, moduleid, data, size, 1000);
1596
1597         if (status == size)
1598                 status = 0;
1599
1600         if (status > 0)
1601                 status = -ECOMM;
1602
1603         return status;
1604 }
1605
1606
1607 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1608         __u16 moduleid, __u16 value, __u8 *data, int size)
1609 {
1610         int status;
1611
1612         status = usb_control_msg(tdev->td_serial->dev,
1613                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1614                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1615                 value, moduleid, data, size, 1000);
1616
1617         if (status == size)
1618                 status = 0;
1619
1620         if (status > 0)
1621                 status = -ECOMM;
1622
1623         return status;
1624 }
1625
1626
1627 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1628         __u8 mask, __u8 byte)
1629 {
1630         int status;
1631         unsigned int size;
1632         struct ti_write_data_bytes *data;
1633         struct device *dev = &tdev->td_serial->dev->dev;
1634
1635         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1636                                         __func__, addr, mask, byte);
1637
1638         size = sizeof(struct ti_write_data_bytes) + 2;
1639         data = kmalloc(size, GFP_KERNEL);
1640         if (!data) {
1641                 dev_err(dev, "%s - out of memory\n", __func__);
1642                 return -ENOMEM;
1643         }
1644
1645         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1646         data->bDataType = TI_RW_DATA_BYTE;
1647         data->bDataCounter = 1;
1648         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1649         data->wBaseAddrLo = cpu_to_be16(addr);
1650         data->bData[0] = mask;
1651         data->bData[1] = byte;
1652
1653         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1654                 (__u8 *)data, size);
1655
1656         if (status < 0)
1657                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1658
1659         kfree(data);
1660
1661         return status;
1662 }
1663
1664 static int ti_do_download(struct usb_device *dev, int pipe,
1665                                                 u8 *buffer, int size)
1666 {
1667         int pos;
1668         u8 cs = 0;
1669         int done;
1670         struct ti_firmware_header *header;
1671         int status;
1672         int len;
1673
1674         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1675                 cs = (__u8)(cs + buffer[pos]);
1676
1677         header = (struct ti_firmware_header *)buffer;
1678         header->wLength = cpu_to_le16((__u16)(size
1679                                         - sizeof(struct ti_firmware_header)));
1680         header->bCheckSum = cs;
1681
1682         dbg("%s - downloading firmware", __func__);
1683         for (pos = 0; pos < size; pos += done) {
1684                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1685                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1686                                                                 &done, 1000);
1687                 if (status)
1688                         break;
1689         }
1690         return status;
1691 }
1692
1693 static int ti_download_firmware(struct ti_device *tdev)
1694 {
1695         int status;
1696         int buffer_size;
1697         __u8 *buffer;
1698         struct usb_device *dev = tdev->td_serial->dev;
1699         unsigned int pipe = usb_sndbulkpipe(dev,
1700                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1701         const struct firmware *fw_p;
1702         char buf[32];
1703
1704         /* try ID specific firmware first, then try generic firmware */
1705         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1706             dev->descriptor.idProduct);
1707         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1708                 buf[0] = '\0';
1709                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1710                         switch (dev->descriptor.idProduct) {
1711                         case MTS_CDMA_PRODUCT_ID:
1712                                 strcpy(buf, "mts_cdma.fw");
1713                                 break;
1714                         case MTS_GSM_PRODUCT_ID:
1715                                 strcpy(buf, "mts_gsm.fw");
1716                                 break;
1717                         case MTS_EDGE_PRODUCT_ID:
1718                                 strcpy(buf, "mts_edge.fw");
1719                                 break;
1720                         }
1721                 }
1722                 if (buf[0] == '\0') {
1723                         if (tdev->td_is_3410)
1724                                 strcpy(buf, "ti_3410.fw");
1725                         else
1726                                 strcpy(buf, "ti_5052.fw");
1727                 }
1728                 status = request_firmware(&fw_p, buf, &dev->dev);
1729         }
1730         if (status) {
1731                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1732                 return -ENOENT;
1733         }
1734         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1735                 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1736                 return -ENOENT;
1737         }
1738
1739         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1740         buffer = kmalloc(buffer_size, GFP_KERNEL);
1741         if (buffer) {
1742                 memcpy(buffer, fw_p->data, fw_p->size);
1743                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1744                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1745                 kfree(buffer);
1746         } else {
1747                 status = -ENOMEM;
1748         }
1749         release_firmware(fw_p);
1750         if (status) {
1751                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1752                                                         __func__, status);
1753                 return status;
1754         }
1755
1756         dbg("%s - download successful", __func__);
1757
1758         return 0;
1759 }
1760
1761
1762 /* Circular Buffer Functions */
1763
1764 /*
1765  * ti_buf_alloc
1766  *
1767  * Allocate a circular buffer and all associated memory.
1768  */
1769
1770 static struct circ_buf *ti_buf_alloc(void)
1771 {
1772         struct circ_buf *cb;
1773
1774         cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1775         if (cb == NULL)
1776                 return NULL;
1777
1778         cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1779         if (cb->buf == NULL) {
1780                 kfree(cb);
1781                 return NULL;
1782         }
1783
1784         ti_buf_clear(cb);
1785
1786         return cb;
1787 }
1788
1789
1790 /*
1791  * ti_buf_free
1792  *
1793  * Free the buffer and all associated memory.
1794  */
1795
1796 static void ti_buf_free(struct circ_buf *cb)
1797 {
1798         kfree(cb->buf);
1799         kfree(cb);
1800 }
1801
1802
1803 /*
1804  * ti_buf_clear
1805  *
1806  * Clear out all data in the circular buffer.
1807  */
1808
1809 static void ti_buf_clear(struct circ_buf *cb)
1810 {
1811         cb->head = cb->tail = 0;
1812 }
1813
1814
1815 /*
1816  * ti_buf_data_avail
1817  *
1818  * Return the number of bytes of data available in the circular
1819  * buffer.
1820  */
1821
1822 static int ti_buf_data_avail(struct circ_buf *cb)
1823 {
1824         return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1825 }
1826
1827
1828 /*
1829  * ti_buf_space_avail
1830  *
1831  * Return the number of bytes of space available in the circular
1832  * buffer.
1833  */
1834
1835 static int ti_buf_space_avail(struct circ_buf *cb)
1836 {
1837         return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1838 }
1839
1840
1841 /*
1842  * ti_buf_put
1843  *
1844  * Copy data data from a user buffer and put it into the circular buffer.
1845  * Restrict to the amount of space available.
1846  *
1847  * Return the number of bytes copied.
1848  */
1849
1850 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1851 {
1852         int c, ret = 0;
1853
1854         while (1) {
1855                 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1856                 if (count < c)
1857                         c = count;
1858                 if (c <= 0)
1859                         break;
1860                 memcpy(cb->buf + cb->head, buf, c);
1861                 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1862                 buf += c;
1863                 count -= c;
1864                 ret += c;
1865         }
1866
1867         return ret;
1868 }
1869
1870
1871 /*
1872  * ti_buf_get
1873  *
1874  * Get data from the circular buffer and copy to the given buffer.
1875  * Restrict to the amount of data available.
1876  *
1877  * Return the number of bytes copied.
1878  */
1879
1880 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1881 {
1882         int c, ret = 0;
1883
1884         while (1) {
1885                 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1886                 if (count < c)
1887                         c = count;
1888                 if (c <= 0)
1889                         break;
1890                 memcpy(buf, cb->buf + cb->tail, c);
1891                 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1892                 buf += c;
1893                 count -= c;
1894                 ret += c;
1895         }
1896
1897         return ret;
1898 }