USB: mct_u232: fix broken close
[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
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/kfifo.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       "v0.10"
44 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
46
47 #define TI_FIRMWARE_BUF_SIZE    16284
48
49 #define TI_WRITE_BUF_SIZE       1024
50
51 #define TI_TRANSFER_TIMEOUT     2
52
53 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
54
55 /* supported setserial flags */
56 #define TI_SET_SERIAL_FLAGS     0
57
58 /* read urb states */
59 #define TI_READ_URB_RUNNING     0
60 #define TI_READ_URB_STOPPING    1
61 #define TI_READ_URB_STOPPED     2
62
63 #define TI_EXTRA_VID_PID_COUNT  5
64
65
66 /* Structures */
67
68 struct ti_port {
69         int                     tp_is_open;
70         __u8                    tp_msr;
71         __u8                    tp_lsr;
72         __u8                    tp_shadow_mcr;
73         __u8                    tp_uart_mode;   /* 232 or 485 modes */
74         unsigned int            tp_uart_base_addr;
75         int                     tp_flags;
76         int                     tp_closing_wait;/* in .01 secs */
77         struct async_icount     tp_icount;
78         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
79         wait_queue_head_t       tp_write_wait;
80         struct ti_device        *tp_tdev;
81         struct usb_serial_port  *tp_port;
82         spinlock_t              tp_lock;
83         int                     tp_read_urb_state;
84         int                     tp_write_urb_in_use;
85         struct kfifo            write_fifo;
86 };
87
88 struct ti_device {
89         struct mutex            td_open_close_lock;
90         int                     td_open_port_count;
91         struct usb_serial       *td_serial;
92         int                     td_is_3410;
93         int                     td_urb_error;
94 };
95
96
97 /* Function Declarations */
98
99 static int ti_startup(struct usb_serial *serial);
100 static void ti_release(struct usb_serial *serial);
101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
102 static void ti_close(struct usb_serial_port *port);
103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
104                 const unsigned char *data, int count);
105 static int ti_write_room(struct tty_struct *tty);
106 static int ti_chars_in_buffer(struct tty_struct *tty);
107 static void ti_throttle(struct tty_struct *tty);
108 static void ti_unthrottle(struct tty_struct *tty);
109 static int ti_ioctl(struct tty_struct *tty, struct file *file,
110                 unsigned int cmd, unsigned long arg);
111 static void ti_set_termios(struct tty_struct *tty,
112                 struct usb_serial_port *port, struct ktermios *old_termios);
113 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
114 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
115                 unsigned int set, unsigned int clear);
116 static void ti_break(struct tty_struct *tty, int break_state);
117 static void ti_interrupt_callback(struct urb *urb);
118 static void ti_bulk_in_callback(struct urb *urb);
119 static void ti_bulk_out_callback(struct urb *urb);
120
121 static void ti_recv(struct device *dev, struct tty_struct *tty,
122         unsigned char *data, int length);
123 static void ti_send(struct ti_port *tport);
124 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
125 static int ti_get_lsr(struct ti_port *tport);
126 static int ti_get_serial_info(struct ti_port *tport,
127         struct serial_struct __user *ret_arg);
128 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
129         struct serial_struct __user *new_arg);
130 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
131
132 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
133
134 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
135 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
136
137 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
138         __u16 moduleid, __u16 value, __u8 *data, int size);
139 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
140         __u16 moduleid, __u16 value, __u8 *data, int size);
141
142 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
143         __u8 mask, __u8 byte);
144
145 static int ti_download_firmware(struct ti_device *tdev);
146
147
148 /* Data */
149
150 /* module parameters */
151 static int debug;
152 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
153 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
154 static unsigned int vendor_3410_count;
155 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
156 static unsigned int product_3410_count;
157 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
158 static unsigned int vendor_5052_count;
159 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
160 static unsigned int product_5052_count;
161
162 /* supported devices */
163 /* the array dimension is the number of default entries plus */
164 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
165 /* null entry */
166 static struct usb_device_id ti_id_table_3410[13+TI_EXTRA_VID_PID_COUNT+1] = {
167         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
168         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
169         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
170         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
171         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
172         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
173         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
174         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
175         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
177         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
178         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
179         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
180 };
181
182 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
183         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
184         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
185         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
186         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
187 };
188
189 static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
190         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
191         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
192         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
193         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
194         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
195         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
196         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
197         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
198         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
199         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
200         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
201         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
202         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
203         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
204         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
205         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
206         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
207         { }
208 };
209
210 static struct usb_driver ti_usb_driver = {
211         .name                   = "ti_usb_3410_5052",
212         .probe                  = usb_serial_probe,
213         .disconnect             = usb_serial_disconnect,
214         .id_table               = ti_id_table_combined,
215         .no_dynamic_id =        1,
216 };
217
218 static struct usb_serial_driver ti_1port_device = {
219         .driver = {
220                 .owner          = THIS_MODULE,
221                 .name           = "ti_usb_3410_5052_1",
222         },
223         .description            = "TI USB 3410 1 port adapter",
224         .usb_driver             = &ti_usb_driver,
225         .id_table               = ti_id_table_3410,
226         .num_ports              = 1,
227         .attach                 = ti_startup,
228         .release                = ti_release,
229         .open                   = ti_open,
230         .close                  = ti_close,
231         .write                  = ti_write,
232         .write_room             = ti_write_room,
233         .chars_in_buffer        = ti_chars_in_buffer,
234         .throttle               = ti_throttle,
235         .unthrottle             = ti_unthrottle,
236         .ioctl                  = ti_ioctl,
237         .set_termios            = ti_set_termios,
238         .tiocmget               = ti_tiocmget,
239         .tiocmset               = ti_tiocmset,
240         .break_ctl              = ti_break,
241         .read_int_callback      = ti_interrupt_callback,
242         .read_bulk_callback     = ti_bulk_in_callback,
243         .write_bulk_callback    = ti_bulk_out_callback,
244 };
245
246 static struct usb_serial_driver ti_2port_device = {
247         .driver = {
248                 .owner          = THIS_MODULE,
249                 .name           = "ti_usb_3410_5052_2",
250         },
251         .description            = "TI USB 5052 2 port adapter",
252         .usb_driver             = &ti_usb_driver,
253         .id_table               = ti_id_table_5052,
254         .num_ports              = 2,
255         .attach                 = ti_startup,
256         .release                = ti_release,
257         .open                   = ti_open,
258         .close                  = ti_close,
259         .write                  = ti_write,
260         .write_room             = ti_write_room,
261         .chars_in_buffer        = ti_chars_in_buffer,
262         .throttle               = ti_throttle,
263         .unthrottle             = ti_unthrottle,
264         .ioctl                  = ti_ioctl,
265         .set_termios            = ti_set_termios,
266         .tiocmget               = ti_tiocmget,
267         .tiocmset               = ti_tiocmset,
268         .break_ctl              = ti_break,
269         .read_int_callback      = ti_interrupt_callback,
270         .read_bulk_callback     = ti_bulk_in_callback,
271         .write_bulk_callback    = ti_bulk_out_callback,
272 };
273
274
275 /* Module */
276
277 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
278 MODULE_DESCRIPTION(TI_DRIVER_DESC);
279 MODULE_VERSION(TI_DRIVER_VERSION);
280 MODULE_LICENSE("GPL");
281
282 MODULE_FIRMWARE("ti_3410.fw");
283 MODULE_FIRMWARE("ti_5052.fw");
284 MODULE_FIRMWARE("mts_cdma.fw");
285 MODULE_FIRMWARE("mts_gsm.fw");
286 MODULE_FIRMWARE("mts_edge.fw");
287 MODULE_FIRMWARE("mts_mt9234mu.fw");
288 MODULE_FIRMWARE("mts_mt9234zba.fw");
289
290 module_param(debug, bool, S_IRUGO | S_IWUSR);
291 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
292
293 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
294 MODULE_PARM_DESC(closing_wait,
295     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
296
297 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
298 MODULE_PARM_DESC(vendor_3410,
299                 "Vendor ids for 3410 based devices, 1-5 short integers");
300 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
301 MODULE_PARM_DESC(product_3410,
302                 "Product ids for 3410 based devices, 1-5 short integers");
303 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
304 MODULE_PARM_DESC(vendor_5052,
305                 "Vendor ids for 5052 based devices, 1-5 short integers");
306 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
307 MODULE_PARM_DESC(product_5052,
308                 "Product ids for 5052 based devices, 1-5 short integers");
309
310 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
311
312
313 /* Functions */
314
315 static int __init ti_init(void)
316 {
317         int i, j, c;
318         int ret;
319
320         /* insert extra vendor and product ids */
321         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
322         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
323         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
324                 ti_id_table_3410[j].idVendor = vendor_3410[i];
325                 ti_id_table_3410[j].idProduct = product_3410[i];
326                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
327                 ti_id_table_combined[c].idVendor = vendor_3410[i];
328                 ti_id_table_combined[c].idProduct = product_3410[i];
329                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
330         }
331         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
332         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
333                 ti_id_table_5052[j].idVendor = vendor_5052[i];
334                 ti_id_table_5052[j].idProduct = product_5052[i];
335                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
336                 ti_id_table_combined[c].idVendor = vendor_5052[i];
337                 ti_id_table_combined[c].idProduct = product_5052[i];
338                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
339         }
340
341         ret = usb_serial_register(&ti_1port_device);
342         if (ret)
343                 goto failed_1port;
344         ret = usb_serial_register(&ti_2port_device);
345         if (ret)
346                 goto failed_2port;
347
348         ret = usb_register(&ti_usb_driver);
349         if (ret)
350                 goto failed_usb;
351
352         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
353                TI_DRIVER_DESC "\n");
354
355         return 0;
356
357 failed_usb:
358         usb_serial_deregister(&ti_2port_device);
359 failed_2port:
360         usb_serial_deregister(&ti_1port_device);
361 failed_1port:
362         return ret;
363 }
364
365
366 static void __exit ti_exit(void)
367 {
368         usb_serial_deregister(&ti_1port_device);
369         usb_serial_deregister(&ti_2port_device);
370         usb_deregister(&ti_usb_driver);
371 }
372
373
374 module_init(ti_init);
375 module_exit(ti_exit);
376
377
378 static int ti_startup(struct usb_serial *serial)
379 {
380         struct ti_device *tdev;
381         struct ti_port *tport;
382         struct usb_device *dev = serial->dev;
383         int status;
384         int i;
385
386
387         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
388             __func__, le16_to_cpu(dev->descriptor.idProduct),
389             dev->descriptor.bNumConfigurations,
390             dev->actconfig->desc.bConfigurationValue);
391
392         /* create device structure */
393         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
394         if (tdev == NULL) {
395                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
396                 return -ENOMEM;
397         }
398         mutex_init(&tdev->td_open_close_lock);
399         tdev->td_serial = serial;
400         usb_set_serial_data(serial, tdev);
401
402         /* determine device type */
403         if (usb_match_id(serial->interface, ti_id_table_3410))
404                 tdev->td_is_3410 = 1;
405         dbg("%s - device type is %s", __func__,
406                                 tdev->td_is_3410 ? "3410" : "5052");
407
408         /* if we have only 1 configuration, download firmware */
409         if (dev->descriptor.bNumConfigurations == 1) {
410                 if ((status = ti_download_firmware(tdev)) != 0)
411                         goto free_tdev;
412
413                 /* 3410 must be reset, 5052 resets itself */
414                 if (tdev->td_is_3410) {
415                         msleep_interruptible(100);
416                         usb_reset_device(dev);
417                 }
418
419                 status = -ENODEV;
420                 goto free_tdev;
421         }
422
423         /* the second configuration must be set */
424         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
425                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
426                 status = status ? status : -ENODEV;
427                 goto free_tdev;
428         }
429
430         /* set up port structures */
431         for (i = 0; i < serial->num_ports; ++i) {
432                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
433                 if (tport == NULL) {
434                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
435                         status = -ENOMEM;
436                         goto free_tports;
437                 }
438                 spin_lock_init(&tport->tp_lock);
439                 tport->tp_uart_base_addr = (i == 0 ?
440                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
441                 tport->tp_closing_wait = closing_wait;
442                 init_waitqueue_head(&tport->tp_msr_wait);
443                 init_waitqueue_head(&tport->tp_write_wait);
444                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
445                                                                 GFP_KERNEL)) {
446                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
447                         kfree(tport);
448                         status = -ENOMEM;
449                         goto free_tports;
450                 }
451                 tport->tp_port = serial->port[i];
452                 tport->tp_tdev = tdev;
453                 usb_set_serial_port_data(serial->port[i], tport);
454                 tport->tp_uart_mode = 0;        /* default is RS232 */
455         }
456
457         return 0;
458
459 free_tports:
460         for (--i; i >= 0; --i) {
461                 tport = usb_get_serial_port_data(serial->port[i]);
462                 kfifo_free(&tport->write_fifo);
463                 kfree(tport);
464                 usb_set_serial_port_data(serial->port[i], NULL);
465         }
466 free_tdev:
467         kfree(tdev);
468         usb_set_serial_data(serial, NULL);
469         return status;
470 }
471
472
473 static void ti_release(struct usb_serial *serial)
474 {
475         int i;
476         struct ti_device *tdev = usb_get_serial_data(serial);
477         struct ti_port *tport;
478
479         dbg("%s", __func__);
480
481         for (i = 0; i < serial->num_ports; ++i) {
482                 tport = usb_get_serial_port_data(serial->port[i]);
483                 if (tport) {
484                         kfifo_free(&tport->write_fifo);
485                         kfree(tport);
486                 }
487         }
488
489         kfree(tdev);
490 }
491
492
493 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
494 {
495         struct ti_port *tport = usb_get_serial_port_data(port);
496         struct ti_device *tdev;
497         struct usb_device *dev;
498         struct urb *urb;
499         int port_number;
500         int status;
501         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
502                              TI_PIPE_TIMEOUT_ENABLE |
503                              (TI_TRANSFER_TIMEOUT << 2));
504
505         dbg("%s - port %d", __func__, port->number);
506
507         if (tport == NULL)
508                 return -ENODEV;
509
510         dev = port->serial->dev;
511         tdev = tport->tp_tdev;
512
513         /* only one open on any port on a device at a time */
514         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
515                 return -ERESTARTSYS;
516
517         port_number = port->number - port->serial->minor;
518
519         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
520
521         tport->tp_msr = 0;
522         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
523
524         /* start interrupt urb the first time a port is opened on this device */
525         if (tdev->td_open_port_count == 0) {
526                 dbg("%s - start interrupt in urb", __func__);
527                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
528                 if (!urb) {
529                         dev_err(&port->dev, "%s - no interrupt urb\n",
530                                                                 __func__);
531                         status = -EINVAL;
532                         goto release_lock;
533                 }
534                 urb->complete = ti_interrupt_callback;
535                 urb->context = tdev;
536                 urb->dev = dev;
537                 status = usb_submit_urb(urb, GFP_KERNEL);
538                 if (status) {
539                         dev_err(&port->dev,
540                                 "%s - submit interrupt urb failed, %d\n",
541                                         __func__, status);
542                         goto release_lock;
543                 }
544         }
545
546         if (tty)
547                 ti_set_termios(tty, port, tty->termios);
548
549         dbg("%s - sending TI_OPEN_PORT", __func__);
550         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
551                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
552         if (status) {
553                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
554                                                         __func__, status);
555                 goto unlink_int_urb;
556         }
557
558         dbg("%s - sending TI_START_PORT", __func__);
559         status = ti_command_out_sync(tdev, TI_START_PORT,
560                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
561         if (status) {
562                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
563                                                         __func__, status);
564                 goto unlink_int_urb;
565         }
566
567         dbg("%s - sending TI_PURGE_PORT", __func__);
568         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
569                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
570         if (status) {
571                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
572                                                         __func__, status);
573                 goto unlink_int_urb;
574         }
575         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
576                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
577         if (status) {
578                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
579                                                         __func__, status);
580                 goto unlink_int_urb;
581         }
582
583         /* reset the data toggle on the bulk endpoints to work around bug in
584          * host controllers where things get out of sync some times */
585         usb_clear_halt(dev, port->write_urb->pipe);
586         usb_clear_halt(dev, port->read_urb->pipe);
587
588         if (tty)
589                 ti_set_termios(tty, port, tty->termios);
590
591         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
592         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
593                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
594         if (status) {
595                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
596                                                         __func__, status);
597                 goto unlink_int_urb;
598         }
599
600         dbg("%s - sending TI_START_PORT (2)", __func__);
601         status = ti_command_out_sync(tdev, TI_START_PORT,
602                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
603         if (status) {
604                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
605                                                         __func__, status);
606                 goto unlink_int_urb;
607         }
608
609         /* start read urb */
610         dbg("%s - start read urb", __func__);
611         urb = port->read_urb;
612         if (!urb) {
613                 dev_err(&port->dev, "%s - no read urb\n", __func__);
614                 status = -EINVAL;
615                 goto unlink_int_urb;
616         }
617         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
618         urb->complete = ti_bulk_in_callback;
619         urb->context = tport;
620         urb->dev = dev;
621         status = usb_submit_urb(urb, GFP_KERNEL);
622         if (status) {
623                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
624                                                         __func__, status);
625                 goto unlink_int_urb;
626         }
627
628         tport->tp_is_open = 1;
629         ++tdev->td_open_port_count;
630
631         goto release_lock;
632
633 unlink_int_urb:
634         if (tdev->td_open_port_count == 0)
635                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
636 release_lock:
637         mutex_unlock(&tdev->td_open_close_lock);
638         dbg("%s - exit %d", __func__, status);
639         return status;
640 }
641
642
643 static void ti_close(struct usb_serial_port *port)
644 {
645         struct ti_device *tdev;
646         struct ti_port *tport;
647         int port_number;
648         int status;
649         int do_unlock;
650
651         dbg("%s - port %d", __func__, port->number);
652
653         tdev = usb_get_serial_data(port->serial);
654         tport = usb_get_serial_port_data(port);
655         if (tdev == NULL || tport == NULL)
656                 return;
657
658         tport->tp_is_open = 0;
659
660         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
661
662         usb_kill_urb(port->read_urb);
663         usb_kill_urb(port->write_urb);
664         tport->tp_write_urb_in_use = 0;
665
666         port_number = port->number - port->serial->minor;
667
668         dbg("%s - sending TI_CLOSE_PORT", __func__);
669         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
670                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
671         if (status)
672                 dev_err(&port->dev,
673                         "%s - cannot send close port command, %d\n"
674                                                         , __func__, status);
675
676         /* if mutex_lock is interrupted, continue anyway */
677         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
678         --tport->tp_tdev->td_open_port_count;
679         if (tport->tp_tdev->td_open_port_count <= 0) {
680                 /* last port is closed, shut down interrupt urb */
681                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
682                 tport->tp_tdev->td_open_port_count = 0;
683         }
684         if (do_unlock)
685                 mutex_unlock(&tdev->td_open_close_lock);
686
687         dbg("%s - exit", __func__);
688 }
689
690
691 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
692                         const unsigned char *data, int count)
693 {
694         struct ti_port *tport = usb_get_serial_port_data(port);
695
696         dbg("%s - port %d", __func__, port->number);
697
698         if (count == 0) {
699                 dbg("%s - write request of 0 bytes", __func__);
700                 return 0;
701         }
702
703         if (tport == NULL || !tport->tp_is_open)
704                 return -ENODEV;
705
706         count = kfifo_in_locked(&tport->write_fifo, data, count,
707                                                         &tport->tp_lock);
708         ti_send(tport);
709
710         return count;
711 }
712
713
714 static int ti_write_room(struct tty_struct *tty)
715 {
716         struct usb_serial_port *port = tty->driver_data;
717         struct ti_port *tport = usb_get_serial_port_data(port);
718         int room = 0;
719         unsigned long flags;
720
721         dbg("%s - port %d", __func__, port->number);
722
723         if (tport == NULL)
724                 return 0;
725
726         spin_lock_irqsave(&tport->tp_lock, flags);
727         room = kfifo_avail(&tport->write_fifo);
728         spin_unlock_irqrestore(&tport->tp_lock, flags);
729
730         dbg("%s - returns %d", __func__, room);
731         return room;
732 }
733
734
735 static int ti_chars_in_buffer(struct tty_struct *tty)
736 {
737         struct usb_serial_port *port = tty->driver_data;
738         struct ti_port *tport = usb_get_serial_port_data(port);
739         int chars = 0;
740         unsigned long flags;
741
742         dbg("%s - port %d", __func__, port->number);
743
744         if (tport == NULL)
745                 return 0;
746
747         spin_lock_irqsave(&tport->tp_lock, flags);
748         chars = kfifo_len(&tport->write_fifo);
749         spin_unlock_irqrestore(&tport->tp_lock, flags);
750
751         dbg("%s - returns %d", __func__, chars);
752         return chars;
753 }
754
755
756 static void ti_throttle(struct tty_struct *tty)
757 {
758         struct usb_serial_port *port = tty->driver_data;
759         struct ti_port *tport = usb_get_serial_port_data(port);
760
761         dbg("%s - port %d", __func__, port->number);
762
763         if (tport == NULL)
764                 return;
765
766         if (I_IXOFF(tty) || C_CRTSCTS(tty))
767                 ti_stop_read(tport, tty);
768
769 }
770
771
772 static void ti_unthrottle(struct tty_struct *tty)
773 {
774         struct usb_serial_port *port = tty->driver_data;
775         struct ti_port *tport = usb_get_serial_port_data(port);
776         int status;
777
778         dbg("%s - port %d", __func__, port->number);
779
780         if (tport == NULL)
781                 return;
782
783         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
784                 status = ti_restart_read(tport, tty);
785                 if (status)
786                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
787                                                         __func__, status);
788         }
789 }
790
791
792 static int ti_ioctl(struct tty_struct *tty, struct file *file,
793         unsigned int cmd, unsigned long arg)
794 {
795         struct usb_serial_port *port = tty->driver_data;
796         struct ti_port *tport = usb_get_serial_port_data(port);
797         struct async_icount cnow;
798         struct async_icount cprev;
799
800         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
801
802         if (tport == NULL)
803                 return -ENODEV;
804
805         switch (cmd) {
806         case TIOCGSERIAL:
807                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
808                 return ti_get_serial_info(tport,
809                                 (struct serial_struct __user *)arg);
810         case TIOCSSERIAL:
811                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
812                 return ti_set_serial_info(tty, tport,
813                                 (struct serial_struct __user *)arg);
814         case TIOCMIWAIT:
815                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
816                 cprev = tport->tp_icount;
817                 while (1) {
818                         interruptible_sleep_on(&tport->tp_msr_wait);
819                         if (signal_pending(current))
820                                 return -ERESTARTSYS;
821                         cnow = tport->tp_icount;
822                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
823                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
824                                 return -EIO; /* no change => error */
825                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
826                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
827                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
828                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
829                                 return 0;
830                         cprev = cnow;
831                 }
832                 break;
833         case TIOCGICOUNT:
834                 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
835                                 __func__, port->number,
836                                 tport->tp_icount.rx, tport->tp_icount.tx);
837                 if (copy_to_user((void __user *)arg, &tport->tp_icount,
838                                         sizeof(tport->tp_icount)))
839                         return -EFAULT;
840                 return 0;
841         }
842         return -ENOIOCTLCMD;
843 }
844
845
846 static void ti_set_termios(struct tty_struct *tty,
847                 struct usb_serial_port *port, struct ktermios *old_termios)
848 {
849         struct ti_port *tport = usb_get_serial_port_data(port);
850         struct ti_uart_config *config;
851         tcflag_t cflag, iflag;
852         int baud;
853         int status;
854         int port_number = port->number - port->serial->minor;
855         unsigned int mcr;
856
857         dbg("%s - port %d", __func__, port->number);
858
859         cflag = tty->termios->c_cflag;
860         iflag = tty->termios->c_iflag;
861
862         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
863         dbg("%s - old clfag %08x, old iflag %08x", __func__,
864                                 old_termios->c_cflag, old_termios->c_iflag);
865
866         if (tport == NULL)
867                 return;
868
869         config = kmalloc(sizeof(*config), GFP_KERNEL);
870         if (!config) {
871                 dev_err(&port->dev, "%s - out of memory\n", __func__);
872                 return;
873         }
874
875         config->wFlags = 0;
876
877         /* these flags must be set */
878         config->wFlags |= TI_UART_ENABLE_MS_INTS;
879         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
880         config->bUartMode = (__u8)(tport->tp_uart_mode);
881
882         switch (cflag & CSIZE) {
883         case CS5:
884                     config->bDataBits = TI_UART_5_DATA_BITS;
885                     break;
886         case CS6:
887                     config->bDataBits = TI_UART_6_DATA_BITS;
888                     break;
889         case CS7:
890                     config->bDataBits = TI_UART_7_DATA_BITS;
891                     break;
892         default:
893         case CS8:
894                     config->bDataBits = TI_UART_8_DATA_BITS;
895                     break;
896         }
897
898         /* CMSPAR isn't supported by this driver */
899         tty->termios->c_cflag &= ~CMSPAR;
900
901         if (cflag & PARENB) {
902                 if (cflag & PARODD) {
903                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
904                         config->bParity = TI_UART_ODD_PARITY;
905                 } else {
906                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
907                         config->bParity = TI_UART_EVEN_PARITY;
908                 }
909         } else {
910                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
911                 config->bParity = TI_UART_NO_PARITY;
912         }
913
914         if (cflag & CSTOPB)
915                 config->bStopBits = TI_UART_2_STOP_BITS;
916         else
917                 config->bStopBits = TI_UART_1_STOP_BITS;
918
919         if (cflag & CRTSCTS) {
920                 /* RTS flow control must be off to drop RTS for baud rate B0 */
921                 if ((cflag & CBAUD) != B0)
922                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
923                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
924         } else {
925                 tty->hw_stopped = 0;
926                 ti_restart_read(tport, tty);
927         }
928
929         if (I_IXOFF(tty) || I_IXON(tty)) {
930                 config->cXon  = START_CHAR(tty);
931                 config->cXoff = STOP_CHAR(tty);
932
933                 if (I_IXOFF(tty))
934                         config->wFlags |= TI_UART_ENABLE_X_IN;
935                 else
936                         ti_restart_read(tport, tty);
937
938                 if (I_IXON(tty))
939                         config->wFlags |= TI_UART_ENABLE_X_OUT;
940         }
941
942         baud = tty_get_baud_rate(tty);
943         if (!baud)
944                 baud = 9600;
945         if (tport->tp_tdev->td_is_3410)
946                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
947         else
948                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
949
950         /* FIXME: Should calculate resulting baud here and report it back */
951         if ((cflag & CBAUD) != B0)
952                 tty_encode_baud_rate(tty, baud, baud);
953
954         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
955         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
956
957         cpu_to_be16s(&config->wBaudRate);
958         cpu_to_be16s(&config->wFlags);
959
960         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
961                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
962                 sizeof(*config));
963         if (status)
964                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
965                                         __func__, port_number, status);
966
967         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
968         mcr = tport->tp_shadow_mcr;
969         /* if baud rate is B0, clear RTS and DTR */
970         if ((cflag & CBAUD) == B0)
971                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
972         status = ti_set_mcr(tport, mcr);
973         if (status)
974                 dev_err(&port->dev,
975                         "%s - cannot set modem control on port %d, %d\n",
976                                                 __func__, port_number, status);
977
978         kfree(config);
979 }
980
981
982 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
983 {
984         struct usb_serial_port *port = tty->driver_data;
985         struct ti_port *tport = usb_get_serial_port_data(port);
986         unsigned int result;
987         unsigned int msr;
988         unsigned int mcr;
989         unsigned long flags;
990
991         dbg("%s - port %d", __func__, port->number);
992
993         if (tport == NULL)
994                 return -ENODEV;
995
996         spin_lock_irqsave(&tport->tp_lock, flags);
997         msr = tport->tp_msr;
998         mcr = tport->tp_shadow_mcr;
999         spin_unlock_irqrestore(&tport->tp_lock, flags);
1000
1001         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1002                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1003                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1004                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1005                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1006                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1007                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1008
1009         dbg("%s - 0x%04X", __func__, result);
1010
1011         return result;
1012 }
1013
1014
1015 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1016         unsigned int set, unsigned int clear)
1017 {
1018         struct usb_serial_port *port = tty->driver_data;
1019         struct ti_port *tport = usb_get_serial_port_data(port);
1020         unsigned int mcr;
1021         unsigned long flags;
1022
1023         dbg("%s - port %d", __func__, port->number);
1024
1025         if (tport == NULL)
1026                 return -ENODEV;
1027
1028         spin_lock_irqsave(&tport->tp_lock, flags);
1029         mcr = tport->tp_shadow_mcr;
1030
1031         if (set & TIOCM_RTS)
1032                 mcr |= TI_MCR_RTS;
1033         if (set & TIOCM_DTR)
1034                 mcr |= TI_MCR_DTR;
1035         if (set & TIOCM_LOOP)
1036                 mcr |= TI_MCR_LOOP;
1037
1038         if (clear & TIOCM_RTS)
1039                 mcr &= ~TI_MCR_RTS;
1040         if (clear & TIOCM_DTR)
1041                 mcr &= ~TI_MCR_DTR;
1042         if (clear & TIOCM_LOOP)
1043                 mcr &= ~TI_MCR_LOOP;
1044         spin_unlock_irqrestore(&tport->tp_lock, flags);
1045
1046         return ti_set_mcr(tport, mcr);
1047 }
1048
1049
1050 static void ti_break(struct tty_struct *tty, int break_state)
1051 {
1052         struct usb_serial_port *port = tty->driver_data;
1053         struct ti_port *tport = usb_get_serial_port_data(port);
1054         int status;
1055
1056         dbg("%s - state = %d", __func__, break_state);
1057
1058         if (tport == NULL)
1059                 return;
1060
1061         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1062
1063         status = ti_write_byte(tport->tp_tdev,
1064                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1065                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1066
1067         if (status)
1068                 dbg("%s - error setting break, %d", __func__, status);
1069 }
1070
1071
1072 static void ti_interrupt_callback(struct urb *urb)
1073 {
1074         struct ti_device *tdev = urb->context;
1075         struct usb_serial_port *port;
1076         struct usb_serial *serial = tdev->td_serial;
1077         struct ti_port *tport;
1078         struct device *dev = &urb->dev->dev;
1079         unsigned char *data = urb->transfer_buffer;
1080         int length = urb->actual_length;
1081         int port_number;
1082         int function;
1083         int status = urb->status;
1084         int retval;
1085         __u8 msr;
1086
1087         dbg("%s", __func__);
1088
1089         switch (status) {
1090         case 0:
1091                 break;
1092         case -ECONNRESET:
1093         case -ENOENT:
1094         case -ESHUTDOWN:
1095                 dbg("%s - urb shutting down, %d", __func__, status);
1096                 tdev->td_urb_error = 1;
1097                 return;
1098         default:
1099                 dev_err(dev, "%s - nonzero urb status, %d\n",
1100                         __func__, status);
1101                 tdev->td_urb_error = 1;
1102                 goto exit;
1103         }
1104
1105         if (length != 2) {
1106                 dbg("%s - bad packet size, %d", __func__, length);
1107                 goto exit;
1108         }
1109
1110         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1111                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1112                 goto exit;
1113         }
1114
1115         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1116         function = TI_GET_FUNC_FROM_CODE(data[0]);
1117
1118         dbg("%s - port_number %d, function %d, data 0x%02X",
1119                                 __func__, port_number, function, data[1]);
1120
1121         if (port_number >= serial->num_ports) {
1122                 dev_err(dev, "%s - bad port number, %d\n",
1123                                                 __func__, port_number);
1124                 goto exit;
1125         }
1126
1127         port = serial->port[port_number];
1128
1129         tport = usb_get_serial_port_data(port);
1130         if (!tport)
1131                 goto exit;
1132
1133         switch (function) {
1134         case TI_CODE_DATA_ERROR:
1135                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1136                                         __func__, port_number, data[1]);
1137                 break;
1138
1139         case TI_CODE_MODEM_STATUS:
1140                 msr = data[1];
1141                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1142                 ti_handle_new_msr(tport, msr);
1143                 break;
1144
1145         default:
1146                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1147                                                         __func__, data[1]);
1148                 break;
1149         }
1150
1151 exit:
1152         retval = usb_submit_urb(urb, GFP_ATOMIC);
1153         if (retval)
1154                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1155                         __func__, retval);
1156 }
1157
1158
1159 static void ti_bulk_in_callback(struct urb *urb)
1160 {
1161         struct ti_port *tport = urb->context;
1162         struct usb_serial_port *port = tport->tp_port;
1163         struct device *dev = &urb->dev->dev;
1164         int status = urb->status;
1165         int retval = 0;
1166         struct tty_struct *tty;
1167
1168         dbg("%s", __func__);
1169
1170         switch (status) {
1171         case 0:
1172                 break;
1173         case -ECONNRESET:
1174         case -ENOENT:
1175         case -ESHUTDOWN:
1176                 dbg("%s - urb shutting down, %d", __func__, status);
1177                 tport->tp_tdev->td_urb_error = 1;
1178                 wake_up_interruptible(&tport->tp_write_wait);
1179                 return;
1180         default:
1181                 dev_err(dev, "%s - nonzero urb status, %d\n",
1182                         __func__, status);
1183                 tport->tp_tdev->td_urb_error = 1;
1184                 wake_up_interruptible(&tport->tp_write_wait);
1185         }
1186
1187         if (status == -EPIPE)
1188                 goto exit;
1189
1190         if (status) {
1191                 dev_err(dev, "%s - stopping read!\n", __func__);
1192                 return;
1193         }
1194
1195         tty = tty_port_tty_get(&port->port);
1196         if (tty) {
1197                 if (urb->actual_length) {
1198                         usb_serial_debug_data(debug, dev, __func__,
1199                                 urb->actual_length, urb->transfer_buffer);
1200
1201                         if (!tport->tp_is_open)
1202                                 dbg("%s - port closed, dropping data",
1203                                         __func__);
1204                         else
1205                                 ti_recv(&urb->dev->dev, tty,
1206                                                 urb->transfer_buffer,
1207                                                 urb->actual_length);
1208                         spin_lock(&tport->tp_lock);
1209                         tport->tp_icount.rx += urb->actual_length;
1210                         spin_unlock(&tport->tp_lock);
1211                 }
1212                 tty_kref_put(tty);
1213         }
1214
1215 exit:
1216         /* continue to read unless stopping */
1217         spin_lock(&tport->tp_lock);
1218         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1219                 urb->dev = port->serial->dev;
1220                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1221         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1222                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1223         }
1224         spin_unlock(&tport->tp_lock);
1225         if (retval)
1226                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1227                         __func__, retval);
1228 }
1229
1230
1231 static void ti_bulk_out_callback(struct urb *urb)
1232 {
1233         struct ti_port *tport = urb->context;
1234         struct usb_serial_port *port = tport->tp_port;
1235         struct device *dev = &urb->dev->dev;
1236         int status = urb->status;
1237
1238         dbg("%s - port %d", __func__, port->number);
1239
1240         tport->tp_write_urb_in_use = 0;
1241
1242         switch (status) {
1243         case 0:
1244                 break;
1245         case -ECONNRESET:
1246         case -ENOENT:
1247         case -ESHUTDOWN:
1248                 dbg("%s - urb shutting down, %d", __func__, status);
1249                 tport->tp_tdev->td_urb_error = 1;
1250                 wake_up_interruptible(&tport->tp_write_wait);
1251                 return;
1252         default:
1253                 dev_err(dev, "%s - nonzero urb status, %d\n",
1254                         __func__, status);
1255                 tport->tp_tdev->td_urb_error = 1;
1256                 wake_up_interruptible(&tport->tp_write_wait);
1257         }
1258
1259         /* send any buffered data */
1260         ti_send(tport);
1261 }
1262
1263
1264 static void ti_recv(struct device *dev, struct tty_struct *tty,
1265         unsigned char *data, int length)
1266 {
1267         int cnt;
1268
1269         do {
1270                 cnt = tty_insert_flip_string(tty, data, length);
1271                 if (cnt < length) {
1272                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1273                                                 __func__, length - cnt);
1274                         if (cnt == 0)
1275                                 break;
1276                 }
1277                 tty_flip_buffer_push(tty);
1278                 data += cnt;
1279                 length -= cnt;
1280         } while (length > 0);
1281
1282 }
1283
1284
1285 static void ti_send(struct ti_port *tport)
1286 {
1287         int count, result;
1288         struct usb_serial_port *port = tport->tp_port;
1289         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1290         unsigned long flags;
1291
1292
1293         dbg("%s - port %d", __func__, port->number);
1294
1295         spin_lock_irqsave(&tport->tp_lock, flags);
1296
1297         if (tport->tp_write_urb_in_use)
1298                 goto unlock;
1299
1300         count = kfifo_out(&tport->write_fifo,
1301                                 port->write_urb->transfer_buffer,
1302                                 port->bulk_out_size);
1303
1304         if (count == 0)
1305                 goto unlock;
1306
1307         tport->tp_write_urb_in_use = 1;
1308
1309         spin_unlock_irqrestore(&tport->tp_lock, flags);
1310
1311         usb_serial_debug_data(debug, &port->dev, __func__, count,
1312                                         port->write_urb->transfer_buffer);
1313
1314         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1315                            usb_sndbulkpipe(port->serial->dev,
1316                                             port->bulk_out_endpointAddress),
1317                            port->write_urb->transfer_buffer, count,
1318                            ti_bulk_out_callback, tport);
1319
1320         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1321         if (result) {
1322                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1323                                                         __func__, result);
1324                 tport->tp_write_urb_in_use = 0;
1325                 /* TODO: reschedule ti_send */
1326         } else {
1327                 spin_lock_irqsave(&tport->tp_lock, flags);
1328                 tport->tp_icount.tx += count;
1329                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1330         }
1331
1332         /* more room in the buffer for new writes, wakeup */
1333         if (tty)
1334                 tty_wakeup(tty);
1335         tty_kref_put(tty);
1336         wake_up_interruptible(&tport->tp_write_wait);
1337         return;
1338 unlock:
1339         spin_unlock_irqrestore(&tport->tp_lock, flags);
1340         tty_kref_put(tty);
1341         return;
1342 }
1343
1344
1345 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1346 {
1347         unsigned long flags;
1348         int status;
1349
1350         status = ti_write_byte(tport->tp_tdev,
1351                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1352                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1353
1354         spin_lock_irqsave(&tport->tp_lock, flags);
1355         if (!status)
1356                 tport->tp_shadow_mcr = mcr;
1357         spin_unlock_irqrestore(&tport->tp_lock, flags);
1358
1359         return status;
1360 }
1361
1362
1363 static int ti_get_lsr(struct ti_port *tport)
1364 {
1365         int size, status;
1366         struct ti_device *tdev = tport->tp_tdev;
1367         struct usb_serial_port *port = tport->tp_port;
1368         int port_number = port->number - port->serial->minor;
1369         struct ti_port_status *data;
1370
1371         dbg("%s - port %d", __func__, port->number);
1372
1373         size = sizeof(struct ti_port_status);
1374         data = kmalloc(size, GFP_KERNEL);
1375         if (!data) {
1376                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1377                 return -ENOMEM;
1378         }
1379
1380         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1381                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1382         if (status) {
1383                 dev_err(&port->dev,
1384                         "%s - get port status command failed, %d\n",
1385                                                         __func__, status);
1386                 goto free_data;
1387         }
1388
1389         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1390
1391         tport->tp_lsr = data->bLSR;
1392
1393 free_data:
1394         kfree(data);
1395         return status;
1396 }
1397
1398
1399 static int ti_get_serial_info(struct ti_port *tport,
1400         struct serial_struct __user *ret_arg)
1401 {
1402         struct usb_serial_port *port = tport->tp_port;
1403         struct serial_struct ret_serial;
1404
1405         if (!ret_arg)
1406                 return -EFAULT;
1407
1408         memset(&ret_serial, 0, sizeof(ret_serial));
1409
1410         ret_serial.type = PORT_16550A;
1411         ret_serial.line = port->serial->minor;
1412         ret_serial.port = port->number - port->serial->minor;
1413         ret_serial.flags = tport->tp_flags;
1414         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1415         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1416         ret_serial.closing_wait = tport->tp_closing_wait;
1417
1418         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1419                 return -EFAULT;
1420
1421         return 0;
1422 }
1423
1424
1425 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1426         struct serial_struct __user *new_arg)
1427 {
1428         struct serial_struct new_serial;
1429
1430         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1431                 return -EFAULT;
1432
1433         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1434         tport->tp_closing_wait = new_serial.closing_wait;
1435
1436         return 0;
1437 }
1438
1439
1440 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1441 {
1442         struct async_icount *icount;
1443         struct tty_struct *tty;
1444         unsigned long flags;
1445
1446         dbg("%s - msr 0x%02X", __func__, msr);
1447
1448         if (msr & TI_MSR_DELTA_MASK) {
1449                 spin_lock_irqsave(&tport->tp_lock, flags);
1450                 icount = &tport->tp_icount;
1451                 if (msr & TI_MSR_DELTA_CTS)
1452                         icount->cts++;
1453                 if (msr & TI_MSR_DELTA_DSR)
1454                         icount->dsr++;
1455                 if (msr & TI_MSR_DELTA_CD)
1456                         icount->dcd++;
1457                 if (msr & TI_MSR_DELTA_RI)
1458                         icount->rng++;
1459                 wake_up_interruptible(&tport->tp_msr_wait);
1460                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1461         }
1462
1463         tport->tp_msr = msr & TI_MSR_MASK;
1464
1465         /* handle CTS flow control */
1466         tty = tty_port_tty_get(&tport->tp_port->port);
1467         if (tty && C_CRTSCTS(tty)) {
1468                 if (msr & TI_MSR_CTS) {
1469                         tty->hw_stopped = 0;
1470                         tty_wakeup(tty);
1471                 } else {
1472                         tty->hw_stopped = 1;
1473                 }
1474         }
1475         tty_kref_put(tty);
1476 }
1477
1478
1479 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1480 {
1481         struct ti_device *tdev = tport->tp_tdev;
1482         struct usb_serial_port *port = tport->tp_port;
1483         wait_queue_t wait;
1484
1485         dbg("%s - port %d", __func__, port->number);
1486
1487         spin_lock_irq(&tport->tp_lock);
1488
1489         /* wait for data to drain from the buffer */
1490         tdev->td_urb_error = 0;
1491         init_waitqueue_entry(&wait, current);
1492         add_wait_queue(&tport->tp_write_wait, &wait);
1493         for (;;) {
1494                 set_current_state(TASK_INTERRUPTIBLE);
1495                 if (kfifo_len(&tport->write_fifo) == 0
1496                 || timeout == 0 || signal_pending(current)
1497                 || tdev->td_urb_error
1498                 || port->serial->disconnected)  /* disconnect */
1499                         break;
1500                 spin_unlock_irq(&tport->tp_lock);
1501                 timeout = schedule_timeout(timeout);
1502                 spin_lock_irq(&tport->tp_lock);
1503         }
1504         set_current_state(TASK_RUNNING);
1505         remove_wait_queue(&tport->tp_write_wait, &wait);
1506
1507         /* flush any remaining data in the buffer */
1508         if (flush)
1509                 kfifo_reset_out(&tport->write_fifo);
1510
1511         spin_unlock_irq(&tport->tp_lock);
1512
1513         mutex_lock(&port->serial->disc_mutex);
1514         /* wait for data to drain from the device */
1515         /* wait for empty tx register, plus 20 ms */
1516         timeout += jiffies;
1517         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1518         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1519         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1520         && !port->serial->disconnected) {
1521                 if (ti_get_lsr(tport))
1522                         break;
1523                 mutex_unlock(&port->serial->disc_mutex);
1524                 msleep_interruptible(20);
1525                 mutex_lock(&port->serial->disc_mutex);
1526         }
1527         mutex_unlock(&port->serial->disc_mutex);
1528 }
1529
1530
1531 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1532 {
1533         unsigned long flags;
1534
1535         spin_lock_irqsave(&tport->tp_lock, flags);
1536
1537         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1538                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1539
1540         spin_unlock_irqrestore(&tport->tp_lock, flags);
1541 }
1542
1543
1544 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1545 {
1546         struct urb *urb;
1547         int status = 0;
1548         unsigned long flags;
1549
1550         spin_lock_irqsave(&tport->tp_lock, flags);
1551
1552         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1553                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1554                 urb = tport->tp_port->read_urb;
1555                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1556                 urb->complete = ti_bulk_in_callback;
1557                 urb->context = tport;
1558                 urb->dev = tport->tp_port->serial->dev;
1559                 status = usb_submit_urb(urb, GFP_KERNEL);
1560         } else  {
1561                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1562                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1563         }
1564
1565         return status;
1566 }
1567
1568
1569 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1570         __u16 moduleid, __u16 value, __u8 *data, int size)
1571 {
1572         int status;
1573
1574         status = usb_control_msg(tdev->td_serial->dev,
1575                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1576                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1577                 value, moduleid, data, size, 1000);
1578
1579         if (status == size)
1580                 status = 0;
1581
1582         if (status > 0)
1583                 status = -ECOMM;
1584
1585         return status;
1586 }
1587
1588
1589 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1590         __u16 moduleid, __u16 value, __u8 *data, int size)
1591 {
1592         int status;
1593
1594         status = usb_control_msg(tdev->td_serial->dev,
1595                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1596                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1597                 value, moduleid, data, size, 1000);
1598
1599         if (status == size)
1600                 status = 0;
1601
1602         if (status > 0)
1603                 status = -ECOMM;
1604
1605         return status;
1606 }
1607
1608
1609 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1610         __u8 mask, __u8 byte)
1611 {
1612         int status;
1613         unsigned int size;
1614         struct ti_write_data_bytes *data;
1615         struct device *dev = &tdev->td_serial->dev->dev;
1616
1617         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1618                                         __func__, addr, mask, byte);
1619
1620         size = sizeof(struct ti_write_data_bytes) + 2;
1621         data = kmalloc(size, GFP_KERNEL);
1622         if (!data) {
1623                 dev_err(dev, "%s - out of memory\n", __func__);
1624                 return -ENOMEM;
1625         }
1626
1627         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1628         data->bDataType = TI_RW_DATA_BYTE;
1629         data->bDataCounter = 1;
1630         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1631         data->wBaseAddrLo = cpu_to_be16(addr);
1632         data->bData[0] = mask;
1633         data->bData[1] = byte;
1634
1635         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1636                 (__u8 *)data, size);
1637
1638         if (status < 0)
1639                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1640
1641         kfree(data);
1642
1643         return status;
1644 }
1645
1646 static int ti_do_download(struct usb_device *dev, int pipe,
1647                                                 u8 *buffer, int size)
1648 {
1649         int pos;
1650         u8 cs = 0;
1651         int done;
1652         struct ti_firmware_header *header;
1653         int status = 0;
1654         int len;
1655
1656         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1657                 cs = (__u8)(cs + buffer[pos]);
1658
1659         header = (struct ti_firmware_header *)buffer;
1660         header->wLength = cpu_to_le16((__u16)(size
1661                                         - sizeof(struct ti_firmware_header)));
1662         header->bCheckSum = cs;
1663
1664         dbg("%s - downloading firmware", __func__);
1665         for (pos = 0; pos < size; pos += done) {
1666                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1667                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1668                                                                 &done, 1000);
1669                 if (status)
1670                         break;
1671         }
1672         return status;
1673 }
1674
1675 static int ti_download_firmware(struct ti_device *tdev)
1676 {
1677         int status;
1678         int buffer_size;
1679         __u8 *buffer;
1680         struct usb_device *dev = tdev->td_serial->dev;
1681         unsigned int pipe = usb_sndbulkpipe(dev,
1682                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1683         const struct firmware *fw_p;
1684         char buf[32];
1685
1686         dbg("%s\n", __func__);
1687         /* try ID specific firmware first, then try generic firmware */
1688         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1689             dev->descriptor.idProduct);
1690         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1691                 buf[0] = '\0';
1692                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1693                         switch (dev->descriptor.idProduct) {
1694                         case MTS_CDMA_PRODUCT_ID:
1695                                 strcpy(buf, "mts_cdma.fw");
1696                                 break;
1697                         case MTS_GSM_PRODUCT_ID:
1698                                 strcpy(buf, "mts_gsm.fw");
1699                                 break;
1700                         case MTS_EDGE_PRODUCT_ID:
1701                                 strcpy(buf, "mts_edge.fw");
1702                                 break;
1703                         case MTS_MT9234MU_PRODUCT_ID:
1704                                 strcpy(buf, "mts_mt9234mu.fw");
1705                                 break;
1706                         case MTS_MT9234ZBA_PRODUCT_ID:
1707                                 strcpy(buf, "mts_mt9234zba.fw");
1708                                 break;
1709                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1710                                 strcpy(buf, "mts_mt9234zba.fw");
1711                                 break;                  }
1712                 }
1713                 if (buf[0] == '\0') {
1714                         if (tdev->td_is_3410)
1715                                 strcpy(buf, "ti_3410.fw");
1716                         else
1717                                 strcpy(buf, "ti_5052.fw");
1718                 }
1719                 status = request_firmware(&fw_p, buf, &dev->dev);
1720         }
1721         if (status) {
1722                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1723                 return -ENOENT;
1724         }
1725         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1726                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1727                 return -ENOENT;
1728         }
1729
1730         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1731         buffer = kmalloc(buffer_size, GFP_KERNEL);
1732         if (buffer) {
1733                 memcpy(buffer, fw_p->data, fw_p->size);
1734                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1735                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1736                 kfree(buffer);
1737         } else {
1738                 dbg("%s ENOMEM\n", __func__);
1739                 status = -ENOMEM;
1740         }
1741         release_firmware(fw_p);
1742         if (status) {
1743                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1744                                                         __func__, status);
1745                 return status;
1746         }
1747
1748         dbg("%s - download successful", __func__);
1749
1750         return 0;
1751 }