tty: Convert the USB drivers to the new icount interface
[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 int ti_get_icount(struct tty_struct *tty,
112                 struct serial_icounter_struct *icount);
113 static void ti_set_termios(struct tty_struct *tty,
114                 struct usb_serial_port *port, struct ktermios *old_termios);
115 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
116 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
117                 unsigned int set, unsigned int clear);
118 static void ti_break(struct tty_struct *tty, int break_state);
119 static void ti_interrupt_callback(struct urb *urb);
120 static void ti_bulk_in_callback(struct urb *urb);
121 static void ti_bulk_out_callback(struct urb *urb);
122
123 static void ti_recv(struct device *dev, struct tty_struct *tty,
124         unsigned char *data, int length);
125 static void ti_send(struct ti_port *tport);
126 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
127 static int ti_get_lsr(struct ti_port *tport);
128 static int ti_get_serial_info(struct ti_port *tport,
129         struct serial_struct __user *ret_arg);
130 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
131         struct serial_struct __user *new_arg);
132 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
133
134 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
135
136 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
137 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
138
139 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
140         __u16 moduleid, __u16 value, __u8 *data, int size);
141 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
142         __u16 moduleid, __u16 value, __u8 *data, int size);
143
144 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
145         __u8 mask, __u8 byte);
146
147 static int ti_download_firmware(struct ti_device *tdev);
148
149
150 /* Data */
151
152 /* module parameters */
153 static int debug;
154 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
155 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
156 static unsigned int vendor_3410_count;
157 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
158 static unsigned int product_3410_count;
159 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
160 static unsigned int vendor_5052_count;
161 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
162 static unsigned int product_5052_count;
163
164 /* supported devices */
165 /* the array dimension is the number of default entries plus */
166 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
167 /* null entry */
168 static struct usb_device_id ti_id_table_3410[13+TI_EXTRA_VID_PID_COUNT+1] = {
169         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
170         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
171         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
172         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
173         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
174         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
175         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
177         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
178         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
179         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
180         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
181         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
182 };
183
184 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
185         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
186         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
189 };
190
191 static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
192         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
194         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
195         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
196         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
197         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
198         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
199         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
200         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
202         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
203         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
204         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
206         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
207         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
209         { }
210 };
211
212 static struct usb_driver ti_usb_driver = {
213         .name                   = "ti_usb_3410_5052",
214         .probe                  = usb_serial_probe,
215         .disconnect             = usb_serial_disconnect,
216         .id_table               = ti_id_table_combined,
217         .no_dynamic_id =        1,
218 };
219
220 static struct usb_serial_driver ti_1port_device = {
221         .driver = {
222                 .owner          = THIS_MODULE,
223                 .name           = "ti_usb_3410_5052_1",
224         },
225         .description            = "TI USB 3410 1 port adapter",
226         .usb_driver             = &ti_usb_driver,
227         .id_table               = ti_id_table_3410,
228         .num_ports              = 1,
229         .attach                 = ti_startup,
230         .release                = ti_release,
231         .open                   = ti_open,
232         .close                  = ti_close,
233         .write                  = ti_write,
234         .write_room             = ti_write_room,
235         .chars_in_buffer        = ti_chars_in_buffer,
236         .throttle               = ti_throttle,
237         .unthrottle             = ti_unthrottle,
238         .ioctl                  = ti_ioctl,
239         .set_termios            = ti_set_termios,
240         .tiocmget               = ti_tiocmget,
241         .tiocmset               = ti_tiocmset,
242         .get_icount             = ti_get_icount,
243         .break_ctl              = ti_break,
244         .read_int_callback      = ti_interrupt_callback,
245         .read_bulk_callback     = ti_bulk_in_callback,
246         .write_bulk_callback    = ti_bulk_out_callback,
247 };
248
249 static struct usb_serial_driver ti_2port_device = {
250         .driver = {
251                 .owner          = THIS_MODULE,
252                 .name           = "ti_usb_3410_5052_2",
253         },
254         .description            = "TI USB 5052 2 port adapter",
255         .usb_driver             = &ti_usb_driver,
256         .id_table               = ti_id_table_5052,
257         .num_ports              = 2,
258         .attach                 = ti_startup,
259         .release                = ti_release,
260         .open                   = ti_open,
261         .close                  = ti_close,
262         .write                  = ti_write,
263         .write_room             = ti_write_room,
264         .chars_in_buffer        = ti_chars_in_buffer,
265         .throttle               = ti_throttle,
266         .unthrottle             = ti_unthrottle,
267         .ioctl                  = ti_ioctl,
268         .set_termios            = ti_set_termios,
269         .tiocmget               = ti_tiocmget,
270         .tiocmset               = ti_tiocmset,
271         .get_icount             = ti_get_icount,
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 MODULE_FIRMWARE("mts_mt9234mu.fw");
292 MODULE_FIRMWARE("mts_mt9234zba.fw");
293
294 module_param(debug, bool, S_IRUGO | S_IWUSR);
295 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
296
297 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
298 MODULE_PARM_DESC(closing_wait,
299     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
300
301 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
302 MODULE_PARM_DESC(vendor_3410,
303                 "Vendor ids for 3410 based devices, 1-5 short integers");
304 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
305 MODULE_PARM_DESC(product_3410,
306                 "Product ids for 3410 based devices, 1-5 short integers");
307 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
308 MODULE_PARM_DESC(vendor_5052,
309                 "Vendor ids for 5052 based devices, 1-5 short integers");
310 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
311 MODULE_PARM_DESC(product_5052,
312                 "Product ids for 5052 based devices, 1-5 short integers");
313
314 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
315
316
317 /* Functions */
318
319 static int __init ti_init(void)
320 {
321         int i, j, c;
322         int ret;
323
324         /* insert extra vendor and product ids */
325         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
326         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
327         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
328                 ti_id_table_3410[j].idVendor = vendor_3410[i];
329                 ti_id_table_3410[j].idProduct = product_3410[i];
330                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
331                 ti_id_table_combined[c].idVendor = vendor_3410[i];
332                 ti_id_table_combined[c].idProduct = product_3410[i];
333                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
334         }
335         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
336         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
337                 ti_id_table_5052[j].idVendor = vendor_5052[i];
338                 ti_id_table_5052[j].idProduct = product_5052[i];
339                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
340                 ti_id_table_combined[c].idVendor = vendor_5052[i];
341                 ti_id_table_combined[c].idProduct = product_5052[i];
342                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
343         }
344
345         ret = usb_serial_register(&ti_1port_device);
346         if (ret)
347                 goto failed_1port;
348         ret = usb_serial_register(&ti_2port_device);
349         if (ret)
350                 goto failed_2port;
351
352         ret = usb_register(&ti_usb_driver);
353         if (ret)
354                 goto failed_usb;
355
356         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
357                TI_DRIVER_DESC "\n");
358
359         return 0;
360
361 failed_usb:
362         usb_serial_deregister(&ti_2port_device);
363 failed_2port:
364         usb_serial_deregister(&ti_1port_device);
365 failed_1port:
366         return ret;
367 }
368
369
370 static void __exit ti_exit(void)
371 {
372         usb_serial_deregister(&ti_1port_device);
373         usb_serial_deregister(&ti_2port_device);
374         usb_deregister(&ti_usb_driver);
375 }
376
377
378 module_init(ti_init);
379 module_exit(ti_exit);
380
381
382 static int ti_startup(struct usb_serial *serial)
383 {
384         struct ti_device *tdev;
385         struct ti_port *tport;
386         struct usb_device *dev = serial->dev;
387         int status;
388         int i;
389
390
391         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
392             __func__, le16_to_cpu(dev->descriptor.idProduct),
393             dev->descriptor.bNumConfigurations,
394             dev->actconfig->desc.bConfigurationValue);
395
396         /* create device structure */
397         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
398         if (tdev == NULL) {
399                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
400                 return -ENOMEM;
401         }
402         mutex_init(&tdev->td_open_close_lock);
403         tdev->td_serial = serial;
404         usb_set_serial_data(serial, tdev);
405
406         /* determine device type */
407         if (usb_match_id(serial->interface, ti_id_table_3410))
408                 tdev->td_is_3410 = 1;
409         dbg("%s - device type is %s", __func__,
410                                 tdev->td_is_3410 ? "3410" : "5052");
411
412         /* if we have only 1 configuration, download firmware */
413         if (dev->descriptor.bNumConfigurations == 1) {
414                 if ((status = ti_download_firmware(tdev)) != 0)
415                         goto free_tdev;
416
417                 /* 3410 must be reset, 5052 resets itself */
418                 if (tdev->td_is_3410) {
419                         msleep_interruptible(100);
420                         usb_reset_device(dev);
421                 }
422
423                 status = -ENODEV;
424                 goto free_tdev;
425         }
426
427         /* the second configuration must be set */
428         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
429                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
430                 status = status ? status : -ENODEV;
431                 goto free_tdev;
432         }
433
434         /* set up port structures */
435         for (i = 0; i < serial->num_ports; ++i) {
436                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
437                 if (tport == NULL) {
438                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
439                         status = -ENOMEM;
440                         goto free_tports;
441                 }
442                 spin_lock_init(&tport->tp_lock);
443                 tport->tp_uart_base_addr = (i == 0 ?
444                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
445                 tport->tp_closing_wait = closing_wait;
446                 init_waitqueue_head(&tport->tp_msr_wait);
447                 init_waitqueue_head(&tport->tp_write_wait);
448                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
449                                                                 GFP_KERNEL)) {
450                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
451                         kfree(tport);
452                         status = -ENOMEM;
453                         goto free_tports;
454                 }
455                 tport->tp_port = serial->port[i];
456                 tport->tp_tdev = tdev;
457                 usb_set_serial_port_data(serial->port[i], tport);
458                 tport->tp_uart_mode = 0;        /* default is RS232 */
459         }
460
461         return 0;
462
463 free_tports:
464         for (--i; i >= 0; --i) {
465                 tport = usb_get_serial_port_data(serial->port[i]);
466                 kfifo_free(&tport->write_fifo);
467                 kfree(tport);
468                 usb_set_serial_port_data(serial->port[i], NULL);
469         }
470 free_tdev:
471         kfree(tdev);
472         usb_set_serial_data(serial, NULL);
473         return status;
474 }
475
476
477 static void ti_release(struct usb_serial *serial)
478 {
479         int i;
480         struct ti_device *tdev = usb_get_serial_data(serial);
481         struct ti_port *tport;
482
483         dbg("%s", __func__);
484
485         for (i = 0; i < serial->num_ports; ++i) {
486                 tport = usb_get_serial_port_data(serial->port[i]);
487                 if (tport) {
488                         kfifo_free(&tport->write_fifo);
489                         kfree(tport);
490                 }
491         }
492
493         kfree(tdev);
494 }
495
496
497 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
498 {
499         struct ti_port *tport = usb_get_serial_port_data(port);
500         struct ti_device *tdev;
501         struct usb_device *dev;
502         struct urb *urb;
503         int port_number;
504         int status;
505         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
506                              TI_PIPE_TIMEOUT_ENABLE |
507                              (TI_TRANSFER_TIMEOUT << 2));
508
509         dbg("%s - port %d", __func__, port->number);
510
511         if (tport == NULL)
512                 return -ENODEV;
513
514         dev = port->serial->dev;
515         tdev = tport->tp_tdev;
516
517         /* only one open on any port on a device at a time */
518         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
519                 return -ERESTARTSYS;
520
521         port_number = port->number - port->serial->minor;
522
523         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
524
525         tport->tp_msr = 0;
526         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
527
528         /* start interrupt urb the first time a port is opened on this device */
529         if (tdev->td_open_port_count == 0) {
530                 dbg("%s - start interrupt in urb", __func__);
531                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
532                 if (!urb) {
533                         dev_err(&port->dev, "%s - no interrupt urb\n",
534                                                                 __func__);
535                         status = -EINVAL;
536                         goto release_lock;
537                 }
538                 urb->complete = ti_interrupt_callback;
539                 urb->context = tdev;
540                 urb->dev = dev;
541                 status = usb_submit_urb(urb, GFP_KERNEL);
542                 if (status) {
543                         dev_err(&port->dev,
544                                 "%s - submit interrupt urb failed, %d\n",
545                                         __func__, status);
546                         goto release_lock;
547                 }
548         }
549
550         if (tty)
551                 ti_set_termios(tty, port, tty->termios);
552
553         dbg("%s - sending TI_OPEN_PORT", __func__);
554         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
555                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
556         if (status) {
557                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
558                                                         __func__, status);
559                 goto unlink_int_urb;
560         }
561
562         dbg("%s - sending TI_START_PORT", __func__);
563         status = ti_command_out_sync(tdev, TI_START_PORT,
564                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
565         if (status) {
566                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
567                                                         __func__, status);
568                 goto unlink_int_urb;
569         }
570
571         dbg("%s - sending TI_PURGE_PORT", __func__);
572         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
573                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
574         if (status) {
575                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
576                                                         __func__, status);
577                 goto unlink_int_urb;
578         }
579         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
580                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
581         if (status) {
582                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
583                                                         __func__, status);
584                 goto unlink_int_urb;
585         }
586
587         /* reset the data toggle on the bulk endpoints to work around bug in
588          * host controllers where things get out of sync some times */
589         usb_clear_halt(dev, port->write_urb->pipe);
590         usb_clear_halt(dev, port->read_urb->pipe);
591
592         if (tty)
593                 ti_set_termios(tty, port, tty->termios);
594
595         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
596         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
597                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
598         if (status) {
599                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
600                                                         __func__, status);
601                 goto unlink_int_urb;
602         }
603
604         dbg("%s - sending TI_START_PORT (2)", __func__);
605         status = ti_command_out_sync(tdev, TI_START_PORT,
606                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
607         if (status) {
608                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
609                                                         __func__, status);
610                 goto unlink_int_urb;
611         }
612
613         /* start read urb */
614         dbg("%s - start read urb", __func__);
615         urb = port->read_urb;
616         if (!urb) {
617                 dev_err(&port->dev, "%s - no read urb\n", __func__);
618                 status = -EINVAL;
619                 goto unlink_int_urb;
620         }
621         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
622         urb->complete = ti_bulk_in_callback;
623         urb->context = tport;
624         urb->dev = dev;
625         status = usb_submit_urb(urb, GFP_KERNEL);
626         if (status) {
627                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
628                                                         __func__, status);
629                 goto unlink_int_urb;
630         }
631
632         tport->tp_is_open = 1;
633         ++tdev->td_open_port_count;
634
635         goto release_lock;
636
637 unlink_int_urb:
638         if (tdev->td_open_port_count == 0)
639                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
640 release_lock:
641         mutex_unlock(&tdev->td_open_close_lock);
642         dbg("%s - exit %d", __func__, status);
643         return status;
644 }
645
646
647 static void ti_close(struct usb_serial_port *port)
648 {
649         struct ti_device *tdev;
650         struct ti_port *tport;
651         int port_number;
652         int status;
653         int do_unlock;
654
655         dbg("%s - port %d", __func__, port->number);
656
657         tdev = usb_get_serial_data(port->serial);
658         tport = usb_get_serial_port_data(port);
659         if (tdev == NULL || tport == NULL)
660                 return;
661
662         tport->tp_is_open = 0;
663
664         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
665
666         usb_kill_urb(port->read_urb);
667         usb_kill_urb(port->write_urb);
668         tport->tp_write_urb_in_use = 0;
669
670         port_number = port->number - port->serial->minor;
671
672         dbg("%s - sending TI_CLOSE_PORT", __func__);
673         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
674                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
675         if (status)
676                 dev_err(&port->dev,
677                         "%s - cannot send close port command, %d\n"
678                                                         , __func__, status);
679
680         /* if mutex_lock is interrupted, continue anyway */
681         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
682         --tport->tp_tdev->td_open_port_count;
683         if (tport->tp_tdev->td_open_port_count <= 0) {
684                 /* last port is closed, shut down interrupt urb */
685                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
686                 tport->tp_tdev->td_open_port_count = 0;
687         }
688         if (do_unlock)
689                 mutex_unlock(&tdev->td_open_close_lock);
690
691         dbg("%s - exit", __func__);
692 }
693
694
695 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
696                         const unsigned char *data, int count)
697 {
698         struct ti_port *tport = usb_get_serial_port_data(port);
699
700         dbg("%s - port %d", __func__, port->number);
701
702         if (count == 0) {
703                 dbg("%s - write request of 0 bytes", __func__);
704                 return 0;
705         }
706
707         if (tport == NULL || !tport->tp_is_open)
708                 return -ENODEV;
709
710         count = kfifo_in_locked(&tport->write_fifo, data, count,
711                                                         &tport->tp_lock);
712         ti_send(tport);
713
714         return count;
715 }
716
717
718 static int ti_write_room(struct tty_struct *tty)
719 {
720         struct usb_serial_port *port = tty->driver_data;
721         struct ti_port *tport = usb_get_serial_port_data(port);
722         int room = 0;
723         unsigned long flags;
724
725         dbg("%s - port %d", __func__, port->number);
726
727         if (tport == NULL)
728                 return 0;
729
730         spin_lock_irqsave(&tport->tp_lock, flags);
731         room = kfifo_avail(&tport->write_fifo);
732         spin_unlock_irqrestore(&tport->tp_lock, flags);
733
734         dbg("%s - returns %d", __func__, room);
735         return room;
736 }
737
738
739 static int ti_chars_in_buffer(struct tty_struct *tty)
740 {
741         struct usb_serial_port *port = tty->driver_data;
742         struct ti_port *tport = usb_get_serial_port_data(port);
743         int chars = 0;
744         unsigned long flags;
745
746         dbg("%s - port %d", __func__, port->number);
747
748         if (tport == NULL)
749                 return 0;
750
751         spin_lock_irqsave(&tport->tp_lock, flags);
752         chars = kfifo_len(&tport->write_fifo);
753         spin_unlock_irqrestore(&tport->tp_lock, flags);
754
755         dbg("%s - returns %d", __func__, chars);
756         return chars;
757 }
758
759
760 static void ti_throttle(struct tty_struct *tty)
761 {
762         struct usb_serial_port *port = tty->driver_data;
763         struct ti_port *tport = usb_get_serial_port_data(port);
764
765         dbg("%s - port %d", __func__, port->number);
766
767         if (tport == NULL)
768                 return;
769
770         if (I_IXOFF(tty) || C_CRTSCTS(tty))
771                 ti_stop_read(tport, tty);
772
773 }
774
775
776 static void ti_unthrottle(struct tty_struct *tty)
777 {
778         struct usb_serial_port *port = tty->driver_data;
779         struct ti_port *tport = usb_get_serial_port_data(port);
780         int status;
781
782         dbg("%s - port %d", __func__, port->number);
783
784         if (tport == NULL)
785                 return;
786
787         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
788                 status = ti_restart_read(tport, tty);
789                 if (status)
790                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
791                                                         __func__, status);
792         }
793 }
794
795 static int ti_get_icount(struct tty_struct *tty,
796                 struct serial_icounter_struct *icount)
797 {
798         struct usb_serial_port *port = tty->driver_data;
799         struct ti_port *tport = usb_get_serial_port_data(port);
800         struct async_icount cnow = tport->tp_icount;
801
802         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
803                 __func__, port->number,
804                 cnow.rx, cnow.tx);
805
806         icount->cts = cnow.cts;
807         icount->dsr = cnow.dsr;
808         icount->rng = cnow.rng;
809         icount->dcd = cnow.dcd;
810         icount->rx = cnow.rx;
811         icount->tx = cnow.tx;
812         icount->frame = cnow.frame;
813         icount->overrun = cnow.overrun;
814         icount->parity = cnow.parity;
815         icount->brk = cnow.brk;
816         icount->buf_overrun = cnow.buf_overrun;
817
818         return 0;
819 }
820
821 static int ti_ioctl(struct tty_struct *tty, struct file *file,
822         unsigned int cmd, unsigned long arg)
823 {
824         struct usb_serial_port *port = tty->driver_data;
825         struct ti_port *tport = usb_get_serial_port_data(port);
826         struct async_icount cnow;
827         struct async_icount cprev;
828
829         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
830
831         if (tport == NULL)
832                 return -ENODEV;
833
834         switch (cmd) {
835         case TIOCGSERIAL:
836                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
837                 return ti_get_serial_info(tport,
838                                 (struct serial_struct __user *)arg);
839         case TIOCSSERIAL:
840                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
841                 return ti_set_serial_info(tty, tport,
842                                 (struct serial_struct __user *)arg);
843         case TIOCMIWAIT:
844                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
845                 cprev = tport->tp_icount;
846                 while (1) {
847                         interruptible_sleep_on(&tport->tp_msr_wait);
848                         if (signal_pending(current))
849                                 return -ERESTARTSYS;
850                         cnow = tport->tp_icount;
851                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
852                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
853                                 return -EIO; /* no change => error */
854                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
855                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
856                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
857                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
858                                 return 0;
859                         cprev = cnow;
860                 }
861                 break;
862         }
863         return -ENOIOCTLCMD;
864 }
865
866
867 static void ti_set_termios(struct tty_struct *tty,
868                 struct usb_serial_port *port, struct ktermios *old_termios)
869 {
870         struct ti_port *tport = usb_get_serial_port_data(port);
871         struct ti_uart_config *config;
872         tcflag_t cflag, iflag;
873         int baud;
874         int status;
875         int port_number = port->number - port->serial->minor;
876         unsigned int mcr;
877
878         dbg("%s - port %d", __func__, port->number);
879
880         cflag = tty->termios->c_cflag;
881         iflag = tty->termios->c_iflag;
882
883         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
884         dbg("%s - old clfag %08x, old iflag %08x", __func__,
885                                 old_termios->c_cflag, old_termios->c_iflag);
886
887         if (tport == NULL)
888                 return;
889
890         config = kmalloc(sizeof(*config), GFP_KERNEL);
891         if (!config) {
892                 dev_err(&port->dev, "%s - out of memory\n", __func__);
893                 return;
894         }
895
896         config->wFlags = 0;
897
898         /* these flags must be set */
899         config->wFlags |= TI_UART_ENABLE_MS_INTS;
900         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
901         config->bUartMode = (__u8)(tport->tp_uart_mode);
902
903         switch (cflag & CSIZE) {
904         case CS5:
905                     config->bDataBits = TI_UART_5_DATA_BITS;
906                     break;
907         case CS6:
908                     config->bDataBits = TI_UART_6_DATA_BITS;
909                     break;
910         case CS7:
911                     config->bDataBits = TI_UART_7_DATA_BITS;
912                     break;
913         default:
914         case CS8:
915                     config->bDataBits = TI_UART_8_DATA_BITS;
916                     break;
917         }
918
919         /* CMSPAR isn't supported by this driver */
920         tty->termios->c_cflag &= ~CMSPAR;
921
922         if (cflag & PARENB) {
923                 if (cflag & PARODD) {
924                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
925                         config->bParity = TI_UART_ODD_PARITY;
926                 } else {
927                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
928                         config->bParity = TI_UART_EVEN_PARITY;
929                 }
930         } else {
931                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
932                 config->bParity = TI_UART_NO_PARITY;
933         }
934
935         if (cflag & CSTOPB)
936                 config->bStopBits = TI_UART_2_STOP_BITS;
937         else
938                 config->bStopBits = TI_UART_1_STOP_BITS;
939
940         if (cflag & CRTSCTS) {
941                 /* RTS flow control must be off to drop RTS for baud rate B0 */
942                 if ((cflag & CBAUD) != B0)
943                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
944                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
945         } else {
946                 tty->hw_stopped = 0;
947                 ti_restart_read(tport, tty);
948         }
949
950         if (I_IXOFF(tty) || I_IXON(tty)) {
951                 config->cXon  = START_CHAR(tty);
952                 config->cXoff = STOP_CHAR(tty);
953
954                 if (I_IXOFF(tty))
955                         config->wFlags |= TI_UART_ENABLE_X_IN;
956                 else
957                         ti_restart_read(tport, tty);
958
959                 if (I_IXON(tty))
960                         config->wFlags |= TI_UART_ENABLE_X_OUT;
961         }
962
963         baud = tty_get_baud_rate(tty);
964         if (!baud)
965                 baud = 9600;
966         if (tport->tp_tdev->td_is_3410)
967                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
968         else
969                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
970
971         /* FIXME: Should calculate resulting baud here and report it back */
972         if ((cflag & CBAUD) != B0)
973                 tty_encode_baud_rate(tty, baud, baud);
974
975         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
976         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
977
978         cpu_to_be16s(&config->wBaudRate);
979         cpu_to_be16s(&config->wFlags);
980
981         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
982                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
983                 sizeof(*config));
984         if (status)
985                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
986                                         __func__, port_number, status);
987
988         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
989         mcr = tport->tp_shadow_mcr;
990         /* if baud rate is B0, clear RTS and DTR */
991         if ((cflag & CBAUD) == B0)
992                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
993         status = ti_set_mcr(tport, mcr);
994         if (status)
995                 dev_err(&port->dev,
996                         "%s - cannot set modem control on port %d, %d\n",
997                                                 __func__, port_number, status);
998
999         kfree(config);
1000 }
1001
1002
1003 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
1004 {
1005         struct usb_serial_port *port = tty->driver_data;
1006         struct ti_port *tport = usb_get_serial_port_data(port);
1007         unsigned int result;
1008         unsigned int msr;
1009         unsigned int mcr;
1010         unsigned long flags;
1011
1012         dbg("%s - port %d", __func__, port->number);
1013
1014         if (tport == NULL)
1015                 return -ENODEV;
1016
1017         spin_lock_irqsave(&tport->tp_lock, flags);
1018         msr = tport->tp_msr;
1019         mcr = tport->tp_shadow_mcr;
1020         spin_unlock_irqrestore(&tport->tp_lock, flags);
1021
1022         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1023                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1024                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1025                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1026                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1027                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1028                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1029
1030         dbg("%s - 0x%04X", __func__, result);
1031
1032         return result;
1033 }
1034
1035
1036 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1037         unsigned int set, unsigned int clear)
1038 {
1039         struct usb_serial_port *port = tty->driver_data;
1040         struct ti_port *tport = usb_get_serial_port_data(port);
1041         unsigned int mcr;
1042         unsigned long flags;
1043
1044         dbg("%s - port %d", __func__, port->number);
1045
1046         if (tport == NULL)
1047                 return -ENODEV;
1048
1049         spin_lock_irqsave(&tport->tp_lock, flags);
1050         mcr = tport->tp_shadow_mcr;
1051
1052         if (set & TIOCM_RTS)
1053                 mcr |= TI_MCR_RTS;
1054         if (set & TIOCM_DTR)
1055                 mcr |= TI_MCR_DTR;
1056         if (set & TIOCM_LOOP)
1057                 mcr |= TI_MCR_LOOP;
1058
1059         if (clear & TIOCM_RTS)
1060                 mcr &= ~TI_MCR_RTS;
1061         if (clear & TIOCM_DTR)
1062                 mcr &= ~TI_MCR_DTR;
1063         if (clear & TIOCM_LOOP)
1064                 mcr &= ~TI_MCR_LOOP;
1065         spin_unlock_irqrestore(&tport->tp_lock, flags);
1066
1067         return ti_set_mcr(tport, mcr);
1068 }
1069
1070
1071 static void ti_break(struct tty_struct *tty, int break_state)
1072 {
1073         struct usb_serial_port *port = tty->driver_data;
1074         struct ti_port *tport = usb_get_serial_port_data(port);
1075         int status;
1076
1077         dbg("%s - state = %d", __func__, break_state);
1078
1079         if (tport == NULL)
1080                 return;
1081
1082         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1083
1084         status = ti_write_byte(tport->tp_tdev,
1085                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1086                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1087
1088         if (status)
1089                 dbg("%s - error setting break, %d", __func__, status);
1090 }
1091
1092
1093 static void ti_interrupt_callback(struct urb *urb)
1094 {
1095         struct ti_device *tdev = urb->context;
1096         struct usb_serial_port *port;
1097         struct usb_serial *serial = tdev->td_serial;
1098         struct ti_port *tport;
1099         struct device *dev = &urb->dev->dev;
1100         unsigned char *data = urb->transfer_buffer;
1101         int length = urb->actual_length;
1102         int port_number;
1103         int function;
1104         int status = urb->status;
1105         int retval;
1106         __u8 msr;
1107
1108         dbg("%s", __func__);
1109
1110         switch (status) {
1111         case 0:
1112                 break;
1113         case -ECONNRESET:
1114         case -ENOENT:
1115         case -ESHUTDOWN:
1116                 dbg("%s - urb shutting down, %d", __func__, status);
1117                 tdev->td_urb_error = 1;
1118                 return;
1119         default:
1120                 dev_err(dev, "%s - nonzero urb status, %d\n",
1121                         __func__, status);
1122                 tdev->td_urb_error = 1;
1123                 goto exit;
1124         }
1125
1126         if (length != 2) {
1127                 dbg("%s - bad packet size, %d", __func__, length);
1128                 goto exit;
1129         }
1130
1131         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1132                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1133                 goto exit;
1134         }
1135
1136         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1137         function = TI_GET_FUNC_FROM_CODE(data[0]);
1138
1139         dbg("%s - port_number %d, function %d, data 0x%02X",
1140                                 __func__, port_number, function, data[1]);
1141
1142         if (port_number >= serial->num_ports) {
1143                 dev_err(dev, "%s - bad port number, %d\n",
1144                                                 __func__, port_number);
1145                 goto exit;
1146         }
1147
1148         port = serial->port[port_number];
1149
1150         tport = usb_get_serial_port_data(port);
1151         if (!tport)
1152                 goto exit;
1153
1154         switch (function) {
1155         case TI_CODE_DATA_ERROR:
1156                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1157                                         __func__, port_number, data[1]);
1158                 break;
1159
1160         case TI_CODE_MODEM_STATUS:
1161                 msr = data[1];
1162                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1163                 ti_handle_new_msr(tport, msr);
1164                 break;
1165
1166         default:
1167                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1168                                                         __func__, data[1]);
1169                 break;
1170         }
1171
1172 exit:
1173         retval = usb_submit_urb(urb, GFP_ATOMIC);
1174         if (retval)
1175                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1176                         __func__, retval);
1177 }
1178
1179
1180 static void ti_bulk_in_callback(struct urb *urb)
1181 {
1182         struct ti_port *tport = urb->context;
1183         struct usb_serial_port *port = tport->tp_port;
1184         struct device *dev = &urb->dev->dev;
1185         int status = urb->status;
1186         int retval = 0;
1187         struct tty_struct *tty;
1188
1189         dbg("%s", __func__);
1190
1191         switch (status) {
1192         case 0:
1193                 break;
1194         case -ECONNRESET:
1195         case -ENOENT:
1196         case -ESHUTDOWN:
1197                 dbg("%s - urb shutting down, %d", __func__, status);
1198                 tport->tp_tdev->td_urb_error = 1;
1199                 wake_up_interruptible(&tport->tp_write_wait);
1200                 return;
1201         default:
1202                 dev_err(dev, "%s - nonzero urb status, %d\n",
1203                         __func__, status);
1204                 tport->tp_tdev->td_urb_error = 1;
1205                 wake_up_interruptible(&tport->tp_write_wait);
1206         }
1207
1208         if (status == -EPIPE)
1209                 goto exit;
1210
1211         if (status) {
1212                 dev_err(dev, "%s - stopping read!\n", __func__);
1213                 return;
1214         }
1215
1216         tty = tty_port_tty_get(&port->port);
1217         if (tty) {
1218                 if (urb->actual_length) {
1219                         usb_serial_debug_data(debug, dev, __func__,
1220                                 urb->actual_length, urb->transfer_buffer);
1221
1222                         if (!tport->tp_is_open)
1223                                 dbg("%s - port closed, dropping data",
1224                                         __func__);
1225                         else
1226                                 ti_recv(&urb->dev->dev, tty,
1227                                                 urb->transfer_buffer,
1228                                                 urb->actual_length);
1229                         spin_lock(&tport->tp_lock);
1230                         tport->tp_icount.rx += urb->actual_length;
1231                         spin_unlock(&tport->tp_lock);
1232                 }
1233                 tty_kref_put(tty);
1234         }
1235
1236 exit:
1237         /* continue to read unless stopping */
1238         spin_lock(&tport->tp_lock);
1239         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1240                 urb->dev = port->serial->dev;
1241                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1242         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1243                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1244         }
1245         spin_unlock(&tport->tp_lock);
1246         if (retval)
1247                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1248                         __func__, retval);
1249 }
1250
1251
1252 static void ti_bulk_out_callback(struct urb *urb)
1253 {
1254         struct ti_port *tport = urb->context;
1255         struct usb_serial_port *port = tport->tp_port;
1256         struct device *dev = &urb->dev->dev;
1257         int status = urb->status;
1258
1259         dbg("%s - port %d", __func__, port->number);
1260
1261         tport->tp_write_urb_in_use = 0;
1262
1263         switch (status) {
1264         case 0:
1265                 break;
1266         case -ECONNRESET:
1267         case -ENOENT:
1268         case -ESHUTDOWN:
1269                 dbg("%s - urb shutting down, %d", __func__, status);
1270                 tport->tp_tdev->td_urb_error = 1;
1271                 wake_up_interruptible(&tport->tp_write_wait);
1272                 return;
1273         default:
1274                 dev_err(dev, "%s - nonzero urb status, %d\n",
1275                         __func__, status);
1276                 tport->tp_tdev->td_urb_error = 1;
1277                 wake_up_interruptible(&tport->tp_write_wait);
1278         }
1279
1280         /* send any buffered data */
1281         ti_send(tport);
1282 }
1283
1284
1285 static void ti_recv(struct device *dev, struct tty_struct *tty,
1286         unsigned char *data, int length)
1287 {
1288         int cnt;
1289
1290         do {
1291                 cnt = tty_insert_flip_string(tty, data, length);
1292                 if (cnt < length) {
1293                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1294                                                 __func__, length - cnt);
1295                         if (cnt == 0)
1296                                 break;
1297                 }
1298                 tty_flip_buffer_push(tty);
1299                 data += cnt;
1300                 length -= cnt;
1301         } while (length > 0);
1302
1303 }
1304
1305
1306 static void ti_send(struct ti_port *tport)
1307 {
1308         int count, result;
1309         struct usb_serial_port *port = tport->tp_port;
1310         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1311         unsigned long flags;
1312
1313
1314         dbg("%s - port %d", __func__, port->number);
1315
1316         spin_lock_irqsave(&tport->tp_lock, flags);
1317
1318         if (tport->tp_write_urb_in_use)
1319                 goto unlock;
1320
1321         count = kfifo_out(&tport->write_fifo,
1322                                 port->write_urb->transfer_buffer,
1323                                 port->bulk_out_size);
1324
1325         if (count == 0)
1326                 goto unlock;
1327
1328         tport->tp_write_urb_in_use = 1;
1329
1330         spin_unlock_irqrestore(&tport->tp_lock, flags);
1331
1332         usb_serial_debug_data(debug, &port->dev, __func__, count,
1333                                         port->write_urb->transfer_buffer);
1334
1335         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1336                            usb_sndbulkpipe(port->serial->dev,
1337                                             port->bulk_out_endpointAddress),
1338                            port->write_urb->transfer_buffer, count,
1339                            ti_bulk_out_callback, tport);
1340
1341         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1342         if (result) {
1343                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1344                                                         __func__, result);
1345                 tport->tp_write_urb_in_use = 0;
1346                 /* TODO: reschedule ti_send */
1347         } else {
1348                 spin_lock_irqsave(&tport->tp_lock, flags);
1349                 tport->tp_icount.tx += count;
1350                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1351         }
1352
1353         /* more room in the buffer for new writes, wakeup */
1354         if (tty)
1355                 tty_wakeup(tty);
1356         tty_kref_put(tty);
1357         wake_up_interruptible(&tport->tp_write_wait);
1358         return;
1359 unlock:
1360         spin_unlock_irqrestore(&tport->tp_lock, flags);
1361         tty_kref_put(tty);
1362         return;
1363 }
1364
1365
1366 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1367 {
1368         unsigned long flags;
1369         int status;
1370
1371         status = ti_write_byte(tport->tp_tdev,
1372                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1373                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1374
1375         spin_lock_irqsave(&tport->tp_lock, flags);
1376         if (!status)
1377                 tport->tp_shadow_mcr = mcr;
1378         spin_unlock_irqrestore(&tport->tp_lock, flags);
1379
1380         return status;
1381 }
1382
1383
1384 static int ti_get_lsr(struct ti_port *tport)
1385 {
1386         int size, status;
1387         struct ti_device *tdev = tport->tp_tdev;
1388         struct usb_serial_port *port = tport->tp_port;
1389         int port_number = port->number - port->serial->minor;
1390         struct ti_port_status *data;
1391
1392         dbg("%s - port %d", __func__, port->number);
1393
1394         size = sizeof(struct ti_port_status);
1395         data = kmalloc(size, GFP_KERNEL);
1396         if (!data) {
1397                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1398                 return -ENOMEM;
1399         }
1400
1401         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1402                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1403         if (status) {
1404                 dev_err(&port->dev,
1405                         "%s - get port status command failed, %d\n",
1406                                                         __func__, status);
1407                 goto free_data;
1408         }
1409
1410         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1411
1412         tport->tp_lsr = data->bLSR;
1413
1414 free_data:
1415         kfree(data);
1416         return status;
1417 }
1418
1419
1420 static int ti_get_serial_info(struct ti_port *tport,
1421         struct serial_struct __user *ret_arg)
1422 {
1423         struct usb_serial_port *port = tport->tp_port;
1424         struct serial_struct ret_serial;
1425
1426         if (!ret_arg)
1427                 return -EFAULT;
1428
1429         memset(&ret_serial, 0, sizeof(ret_serial));
1430
1431         ret_serial.type = PORT_16550A;
1432         ret_serial.line = port->serial->minor;
1433         ret_serial.port = port->number - port->serial->minor;
1434         ret_serial.flags = tport->tp_flags;
1435         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1436         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1437         ret_serial.closing_wait = tport->tp_closing_wait;
1438
1439         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1440                 return -EFAULT;
1441
1442         return 0;
1443 }
1444
1445
1446 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1447         struct serial_struct __user *new_arg)
1448 {
1449         struct serial_struct new_serial;
1450
1451         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1452                 return -EFAULT;
1453
1454         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1455         tport->tp_closing_wait = new_serial.closing_wait;
1456
1457         return 0;
1458 }
1459
1460
1461 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1462 {
1463         struct async_icount *icount;
1464         struct tty_struct *tty;
1465         unsigned long flags;
1466
1467         dbg("%s - msr 0x%02X", __func__, msr);
1468
1469         if (msr & TI_MSR_DELTA_MASK) {
1470                 spin_lock_irqsave(&tport->tp_lock, flags);
1471                 icount = &tport->tp_icount;
1472                 if (msr & TI_MSR_DELTA_CTS)
1473                         icount->cts++;
1474                 if (msr & TI_MSR_DELTA_DSR)
1475                         icount->dsr++;
1476                 if (msr & TI_MSR_DELTA_CD)
1477                         icount->dcd++;
1478                 if (msr & TI_MSR_DELTA_RI)
1479                         icount->rng++;
1480                 wake_up_interruptible(&tport->tp_msr_wait);
1481                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1482         }
1483
1484         tport->tp_msr = msr & TI_MSR_MASK;
1485
1486         /* handle CTS flow control */
1487         tty = tty_port_tty_get(&tport->tp_port->port);
1488         if (tty && C_CRTSCTS(tty)) {
1489                 if (msr & TI_MSR_CTS) {
1490                         tty->hw_stopped = 0;
1491                         tty_wakeup(tty);
1492                 } else {
1493                         tty->hw_stopped = 1;
1494                 }
1495         }
1496         tty_kref_put(tty);
1497 }
1498
1499
1500 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1501 {
1502         struct ti_device *tdev = tport->tp_tdev;
1503         struct usb_serial_port *port = tport->tp_port;
1504         wait_queue_t wait;
1505
1506         dbg("%s - port %d", __func__, port->number);
1507
1508         spin_lock_irq(&tport->tp_lock);
1509
1510         /* wait for data to drain from the buffer */
1511         tdev->td_urb_error = 0;
1512         init_waitqueue_entry(&wait, current);
1513         add_wait_queue(&tport->tp_write_wait, &wait);
1514         for (;;) {
1515                 set_current_state(TASK_INTERRUPTIBLE);
1516                 if (kfifo_len(&tport->write_fifo) == 0
1517                 || timeout == 0 || signal_pending(current)
1518                 || tdev->td_urb_error
1519                 || port->serial->disconnected)  /* disconnect */
1520                         break;
1521                 spin_unlock_irq(&tport->tp_lock);
1522                 timeout = schedule_timeout(timeout);
1523                 spin_lock_irq(&tport->tp_lock);
1524         }
1525         set_current_state(TASK_RUNNING);
1526         remove_wait_queue(&tport->tp_write_wait, &wait);
1527
1528         /* flush any remaining data in the buffer */
1529         if (flush)
1530                 kfifo_reset_out(&tport->write_fifo);
1531
1532         spin_unlock_irq(&tport->tp_lock);
1533
1534         mutex_lock(&port->serial->disc_mutex);
1535         /* wait for data to drain from the device */
1536         /* wait for empty tx register, plus 20 ms */
1537         timeout += jiffies;
1538         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1539         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1540         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1541         && !port->serial->disconnected) {
1542                 if (ti_get_lsr(tport))
1543                         break;
1544                 mutex_unlock(&port->serial->disc_mutex);
1545                 msleep_interruptible(20);
1546                 mutex_lock(&port->serial->disc_mutex);
1547         }
1548         mutex_unlock(&port->serial->disc_mutex);
1549 }
1550
1551
1552 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1553 {
1554         unsigned long flags;
1555
1556         spin_lock_irqsave(&tport->tp_lock, flags);
1557
1558         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1559                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1560
1561         spin_unlock_irqrestore(&tport->tp_lock, flags);
1562 }
1563
1564
1565 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1566 {
1567         struct urb *urb;
1568         int status = 0;
1569         unsigned long flags;
1570
1571         spin_lock_irqsave(&tport->tp_lock, flags);
1572
1573         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1574                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1575                 urb = tport->tp_port->read_urb;
1576                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1577                 urb->complete = ti_bulk_in_callback;
1578                 urb->context = tport;
1579                 urb->dev = tport->tp_port->serial->dev;
1580                 status = usb_submit_urb(urb, GFP_KERNEL);
1581         } else  {
1582                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1583                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1584         }
1585
1586         return status;
1587 }
1588
1589
1590 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1591         __u16 moduleid, __u16 value, __u8 *data, int size)
1592 {
1593         int status;
1594
1595         status = usb_control_msg(tdev->td_serial->dev,
1596                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1597                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1598                 value, moduleid, data, size, 1000);
1599
1600         if (status == size)
1601                 status = 0;
1602
1603         if (status > 0)
1604                 status = -ECOMM;
1605
1606         return status;
1607 }
1608
1609
1610 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1611         __u16 moduleid, __u16 value, __u8 *data, int size)
1612 {
1613         int status;
1614
1615         status = usb_control_msg(tdev->td_serial->dev,
1616                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1617                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1618                 value, moduleid, data, size, 1000);
1619
1620         if (status == size)
1621                 status = 0;
1622
1623         if (status > 0)
1624                 status = -ECOMM;
1625
1626         return status;
1627 }
1628
1629
1630 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1631         __u8 mask, __u8 byte)
1632 {
1633         int status;
1634         unsigned int size;
1635         struct ti_write_data_bytes *data;
1636         struct device *dev = &tdev->td_serial->dev->dev;
1637
1638         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1639                                         __func__, addr, mask, byte);
1640
1641         size = sizeof(struct ti_write_data_bytes) + 2;
1642         data = kmalloc(size, GFP_KERNEL);
1643         if (!data) {
1644                 dev_err(dev, "%s - out of memory\n", __func__);
1645                 return -ENOMEM;
1646         }
1647
1648         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1649         data->bDataType = TI_RW_DATA_BYTE;
1650         data->bDataCounter = 1;
1651         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1652         data->wBaseAddrLo = cpu_to_be16(addr);
1653         data->bData[0] = mask;
1654         data->bData[1] = byte;
1655
1656         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1657                 (__u8 *)data, size);
1658
1659         if (status < 0)
1660                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1661
1662         kfree(data);
1663
1664         return status;
1665 }
1666
1667 static int ti_do_download(struct usb_device *dev, int pipe,
1668                                                 u8 *buffer, int size)
1669 {
1670         int pos;
1671         u8 cs = 0;
1672         int done;
1673         struct ti_firmware_header *header;
1674         int status = 0;
1675         int len;
1676
1677         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1678                 cs = (__u8)(cs + buffer[pos]);
1679
1680         header = (struct ti_firmware_header *)buffer;
1681         header->wLength = cpu_to_le16((__u16)(size
1682                                         - sizeof(struct ti_firmware_header)));
1683         header->bCheckSum = cs;
1684
1685         dbg("%s - downloading firmware", __func__);
1686         for (pos = 0; pos < size; pos += done) {
1687                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1688                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1689                                                                 &done, 1000);
1690                 if (status)
1691                         break;
1692         }
1693         return status;
1694 }
1695
1696 static int ti_download_firmware(struct ti_device *tdev)
1697 {
1698         int status;
1699         int buffer_size;
1700         __u8 *buffer;
1701         struct usb_device *dev = tdev->td_serial->dev;
1702         unsigned int pipe = usb_sndbulkpipe(dev,
1703                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1704         const struct firmware *fw_p;
1705         char buf[32];
1706
1707         dbg("%s\n", __func__);
1708         /* try ID specific firmware first, then try generic firmware */
1709         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1710             dev->descriptor.idProduct);
1711         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1712                 buf[0] = '\0';
1713                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1714                         switch (dev->descriptor.idProduct) {
1715                         case MTS_CDMA_PRODUCT_ID:
1716                                 strcpy(buf, "mts_cdma.fw");
1717                                 break;
1718                         case MTS_GSM_PRODUCT_ID:
1719                                 strcpy(buf, "mts_gsm.fw");
1720                                 break;
1721                         case MTS_EDGE_PRODUCT_ID:
1722                                 strcpy(buf, "mts_edge.fw");
1723                                 break;
1724                         case MTS_MT9234MU_PRODUCT_ID:
1725                                 strcpy(buf, "mts_mt9234mu.fw");
1726                                 break;
1727                         case MTS_MT9234ZBA_PRODUCT_ID:
1728                                 strcpy(buf, "mts_mt9234zba.fw");
1729                                 break;
1730                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1731                                 strcpy(buf, "mts_mt9234zba.fw");
1732                                 break;                  }
1733                 }
1734                 if (buf[0] == '\0') {
1735                         if (tdev->td_is_3410)
1736                                 strcpy(buf, "ti_3410.fw");
1737                         else
1738                                 strcpy(buf, "ti_5052.fw");
1739                 }
1740                 status = request_firmware(&fw_p, buf, &dev->dev);
1741         }
1742         if (status) {
1743                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1744                 return -ENOENT;
1745         }
1746         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1747                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1748                 return -ENOENT;
1749         }
1750
1751         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1752         buffer = kmalloc(buffer_size, GFP_KERNEL);
1753         if (buffer) {
1754                 memcpy(buffer, fw_p->data, fw_p->size);
1755                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1756                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1757                 kfree(buffer);
1758         } else {
1759                 dbg("%s ENOMEM\n", __func__);
1760                 status = -ENOMEM;
1761         }
1762         release_firmware(fw_p);
1763         if (status) {
1764                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1765                                                         __func__, status);
1766                 return status;
1767         }
1768
1769         dbg("%s - download successful", __func__);
1770
1771         return 0;
1772 }