Version:  2.0.40 2.2.26 2.4.37 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7

Linux/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/slab.h>
 25 #include <linux/tty.h>
 26 #include <linux/tty_driver.h>
 27 #include <linux/tty_flip.h>
 28 #include <linux/module.h>
 29 #include <linux/spinlock.h>
 30 #include <linux/ioctl.h>
 31 #include <linux/serial.h>
 32 #include <linux/kfifo.h>
 33 #include <linux/mutex.h>
 34 #include <linux/uaccess.h>
 35 #include <linux/usb.h>
 36 #include <linux/usb/serial.h>
 37 
 38 #include "ti_usb_3410_5052.h"
 39 
 40 /* Defines */
 41 
 42 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
 43 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
 44 
 45 #define TI_FIRMWARE_BUF_SIZE    16284
 46 
 47 #define TI_TRANSFER_TIMEOUT     2
 48 
 49 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
 50 
 51 /* supported setserial flags */
 52 #define TI_SET_SERIAL_FLAGS     0
 53 
 54 /* read urb states */
 55 #define TI_READ_URB_RUNNING     0
 56 #define TI_READ_URB_STOPPING    1
 57 #define TI_READ_URB_STOPPED     2
 58 
 59 #define TI_EXTRA_VID_PID_COUNT  5
 60 
 61 
 62 /* Structures */
 63 
 64 struct ti_port {
 65         int                     tp_is_open;
 66         __u8                    tp_msr;
 67         __u8                    tp_shadow_mcr;
 68         __u8                    tp_uart_mode;   /* 232 or 485 modes */
 69         unsigned int            tp_uart_base_addr;
 70         int                     tp_flags;
 71         struct ti_device        *tp_tdev;
 72         struct usb_serial_port  *tp_port;
 73         spinlock_t              tp_lock;
 74         int                     tp_read_urb_state;
 75         int                     tp_write_urb_in_use;
 76 };
 77 
 78 struct ti_device {
 79         struct mutex            td_open_close_lock;
 80         int                     td_open_port_count;
 81         struct usb_serial       *td_serial;
 82         int                     td_is_3410;
 83         bool                    td_rs485_only;
 84         int                     td_urb_error;
 85 };
 86 
 87 
 88 /* Function Declarations */
 89 
 90 static int ti_startup(struct usb_serial *serial);
 91 static void ti_release(struct usb_serial *serial);
 92 static int ti_port_probe(struct usb_serial_port *port);
 93 static int ti_port_remove(struct usb_serial_port *port);
 94 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 95 static void ti_close(struct usb_serial_port *port);
 96 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 97                 const unsigned char *data, int count);
 98 static int ti_write_room(struct tty_struct *tty);
 99 static int ti_chars_in_buffer(struct tty_struct *tty);
100 static bool ti_tx_empty(struct usb_serial_port *port);
101 static void ti_throttle(struct tty_struct *tty);
102 static void ti_unthrottle(struct tty_struct *tty);
103 static int ti_ioctl(struct tty_struct *tty,
104                 unsigned int cmd, unsigned long arg);
105 static void ti_set_termios(struct tty_struct *tty,
106                 struct usb_serial_port *port, struct ktermios *old_termios);
107 static int ti_tiocmget(struct tty_struct *tty);
108 static int ti_tiocmset(struct tty_struct *tty,
109                 unsigned int set, unsigned int clear);
110 static void ti_break(struct tty_struct *tty, int break_state);
111 static void ti_interrupt_callback(struct urb *urb);
112 static void ti_bulk_in_callback(struct urb *urb);
113 static void ti_bulk_out_callback(struct urb *urb);
114 
115 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
116                 int length);
117 static void ti_send(struct ti_port *tport);
118 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
119 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
120 static int ti_get_serial_info(struct ti_port *tport,
121         struct serial_struct __user *ret_arg);
122 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
123         struct serial_struct __user *new_arg);
124 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
125 
126 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
127 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
128 
129 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
130         __u16 moduleid, __u16 value, __u8 *data, int size);
131 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
132         __u16 moduleid, __u16 value, __u8 *data, int size);
133 
134 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
135                          unsigned long addr, __u8 mask, __u8 byte);
136 
137 static int ti_download_firmware(struct ti_device *tdev);
138 
139 
140 /* Data */
141 
142 /* module parameters */
143 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
144 
145 /* supported devices */
146 static const struct usb_device_id ti_id_table_3410[] = {
147         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
148         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
149         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
150         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
151         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
152         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
153         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
154         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
155         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
156         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
157         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
158         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
159         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
160         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
161         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
162         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
163         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
164         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
165         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
166         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
167         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
168         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
169         { }     /* terminator */
170 };
171 
172 static const struct usb_device_id ti_id_table_5052[] = {
173         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
174         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
175         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
176         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
177         { }     /* terminator */
178 };
179 
180 static const struct usb_device_id ti_id_table_combined[] = {
181         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
182         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
183         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
184         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
185         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
186         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
187         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
188         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
189         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
190         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
191         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
192         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
193         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
194         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
195         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
196         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
197         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
198         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
199         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
200         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
201         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
202         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1110_PRODUCT_ID) },
203         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1130_PRODUCT_ID) },
204         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1131_PRODUCT_ID) },
205         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1150_PRODUCT_ID) },
206         { USB_DEVICE(MXU1_VENDOR_ID, MXU1_1151_PRODUCT_ID) },
207         { }     /* terminator */
208 };
209 
210 static struct usb_serial_driver ti_1port_device = {
211         .driver = {
212                 .owner          = THIS_MODULE,
213                 .name           = "ti_usb_3410_5052_1",
214         },
215         .description            = "TI USB 3410 1 port adapter",
216         .id_table               = ti_id_table_3410,
217         .num_ports              = 1,
218         .attach                 = ti_startup,
219         .release                = ti_release,
220         .port_probe             = ti_port_probe,
221         .port_remove            = ti_port_remove,
222         .open                   = ti_open,
223         .close                  = ti_close,
224         .write                  = ti_write,
225         .write_room             = ti_write_room,
226         .chars_in_buffer        = ti_chars_in_buffer,
227         .tx_empty               = ti_tx_empty,
228         .throttle               = ti_throttle,
229         .unthrottle             = ti_unthrottle,
230         .ioctl                  = ti_ioctl,
231         .set_termios            = ti_set_termios,
232         .tiocmget               = ti_tiocmget,
233         .tiocmset               = ti_tiocmset,
234         .tiocmiwait             = usb_serial_generic_tiocmiwait,
235         .get_icount             = usb_serial_generic_get_icount,
236         .break_ctl              = ti_break,
237         .read_int_callback      = ti_interrupt_callback,
238         .read_bulk_callback     = ti_bulk_in_callback,
239         .write_bulk_callback    = ti_bulk_out_callback,
240 };
241 
242 static struct usb_serial_driver ti_2port_device = {
243         .driver = {
244                 .owner          = THIS_MODULE,
245                 .name           = "ti_usb_3410_5052_2",
246         },
247         .description            = "TI USB 5052 2 port adapter",
248         .id_table               = ti_id_table_5052,
249         .num_ports              = 2,
250         .attach                 = ti_startup,
251         .release                = ti_release,
252         .port_probe             = ti_port_probe,
253         .port_remove            = ti_port_remove,
254         .open                   = ti_open,
255         .close                  = ti_close,
256         .write                  = ti_write,
257         .write_room             = ti_write_room,
258         .chars_in_buffer        = ti_chars_in_buffer,
259         .tx_empty               = ti_tx_empty,
260         .throttle               = ti_throttle,
261         .unthrottle             = ti_unthrottle,
262         .ioctl                  = ti_ioctl,
263         .set_termios            = ti_set_termios,
264         .tiocmget               = ti_tiocmget,
265         .tiocmset               = ti_tiocmset,
266         .tiocmiwait             = usb_serial_generic_tiocmiwait,
267         .get_icount             = usb_serial_generic_get_icount,
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 static struct usb_serial_driver * const serial_drivers[] = {
275         &ti_1port_device, &ti_2port_device, NULL
276 };
277 
278 /* Module */
279 
280 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
281 MODULE_DESCRIPTION(TI_DRIVER_DESC);
282 MODULE_LICENSE("GPL");
283 
284 MODULE_FIRMWARE("ti_3410.fw");
285 MODULE_FIRMWARE("ti_5052.fw");
286 MODULE_FIRMWARE("mts_cdma.fw");
287 MODULE_FIRMWARE("mts_gsm.fw");
288 MODULE_FIRMWARE("mts_edge.fw");
289 MODULE_FIRMWARE("mts_mt9234mu.fw");
290 MODULE_FIRMWARE("mts_mt9234zba.fw");
291 MODULE_FIRMWARE("moxa/moxa-1110.fw");
292 MODULE_FIRMWARE("moxa/moxa-1130.fw");
293 MODULE_FIRMWARE("moxa/moxa-1131.fw");
294 MODULE_FIRMWARE("moxa/moxa-1150.fw");
295 MODULE_FIRMWARE("moxa/moxa-1151.fw");
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_DEVICE_TABLE(usb, ti_id_table_combined);
302 
303 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
304 
305 /* Functions */
306 
307 static int ti_startup(struct usb_serial *serial)
308 {
309         struct ti_device *tdev;
310         struct usb_device *dev = serial->dev;
311         struct usb_host_interface *cur_altsetting;
312         int num_endpoints;
313         u16 vid, pid;
314         int status;
315 
316         dev_dbg(&dev->dev,
317                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
318                 __func__, le16_to_cpu(dev->descriptor.idProduct),
319                 dev->descriptor.bNumConfigurations,
320                 dev->actconfig->desc.bConfigurationValue);
321 
322         /* create device structure */
323         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
324         if (!tdev)
325                 return -ENOMEM;
326 
327         mutex_init(&tdev->td_open_close_lock);
328         tdev->td_serial = serial;
329         usb_set_serial_data(serial, tdev);
330 
331         /* determine device type */
332         if (serial->type == &ti_1port_device)
333                 tdev->td_is_3410 = 1;
334         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
335                 tdev->td_is_3410 ? "3410" : "5052");
336 
337         vid = le16_to_cpu(dev->descriptor.idVendor);
338         pid = le16_to_cpu(dev->descriptor.idProduct);
339         if (vid == MXU1_VENDOR_ID) {
340                 switch (pid) {
341                 case MXU1_1130_PRODUCT_ID:
342                 case MXU1_1131_PRODUCT_ID:
343                         tdev->td_rs485_only = true;
344                         break;
345                 }
346         }
347 
348         cur_altsetting = serial->interface->cur_altsetting;
349         num_endpoints = cur_altsetting->desc.bNumEndpoints;
350 
351         /* if we have only 1 configuration and 1 endpoint, download firmware */
352         if (dev->descriptor.bNumConfigurations == 1 && num_endpoints == 1) {
353                 status = ti_download_firmware(tdev);
354 
355                 if (status != 0)
356                         goto free_tdev;
357 
358                 /* 3410 must be reset, 5052 resets itself */
359                 if (tdev->td_is_3410) {
360                         msleep_interruptible(100);
361                         usb_reset_device(dev);
362                 }
363 
364                 status = -ENODEV;
365                 goto free_tdev;
366         }
367 
368         /* the second configuration must be set */
369         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
370                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
371                 status = status ? status : -ENODEV;
372                 goto free_tdev;
373         }
374 
375         return 0;
376 
377 free_tdev:
378         kfree(tdev);
379         usb_set_serial_data(serial, NULL);
380         return status;
381 }
382 
383 
384 static void ti_release(struct usb_serial *serial)
385 {
386         struct ti_device *tdev = usb_get_serial_data(serial);
387 
388         kfree(tdev);
389 }
390 
391 static int ti_port_probe(struct usb_serial_port *port)
392 {
393         struct ti_port *tport;
394 
395         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
396         if (!tport)
397                 return -ENOMEM;
398 
399         spin_lock_init(&tport->tp_lock);
400         if (port == port->serial->port[0])
401                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
402         else
403                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
404         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
405         tport->tp_port = port;
406         tport->tp_tdev = usb_get_serial_data(port->serial);
407 
408         if (tport->tp_tdev->td_rs485_only)
409                 tport->tp_uart_mode = TI_UART_485_RECEIVER_DISABLED;
410         else
411                 tport->tp_uart_mode = TI_UART_232;
412 
413         usb_set_serial_port_data(port, tport);
414 
415         port->port.drain_delay = 3;
416 
417         return 0;
418 }
419 
420 static int ti_port_remove(struct usb_serial_port *port)
421 {
422         struct ti_port *tport;
423 
424         tport = usb_get_serial_port_data(port);
425         kfree(tport);
426 
427         return 0;
428 }
429 
430 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
431 {
432         struct ti_port *tport = usb_get_serial_port_data(port);
433         struct ti_device *tdev;
434         struct usb_device *dev;
435         struct urb *urb;
436         int port_number;
437         int status;
438         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
439                              TI_PIPE_TIMEOUT_ENABLE |
440                              (TI_TRANSFER_TIMEOUT << 2));
441 
442         if (tport == NULL)
443                 return -ENODEV;
444 
445         dev = port->serial->dev;
446         tdev = tport->tp_tdev;
447 
448         /* only one open on any port on a device at a time */
449         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
450                 return -ERESTARTSYS;
451 
452         port_number = port->port_number;
453 
454         tport->tp_msr = 0;
455         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
456 
457         /* start interrupt urb the first time a port is opened on this device */
458         if (tdev->td_open_port_count == 0) {
459                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
460                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
461                 if (!urb) {
462                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
463                         status = -EINVAL;
464                         goto release_lock;
465                 }
466                 urb->context = tdev;
467                 status = usb_submit_urb(urb, GFP_KERNEL);
468                 if (status) {
469                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
470                         goto release_lock;
471                 }
472         }
473 
474         if (tty)
475                 ti_set_termios(tty, port, &tty->termios);
476 
477         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
478         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
479                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
480         if (status) {
481                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
482                         __func__, status);
483                 goto unlink_int_urb;
484         }
485 
486         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
487         status = ti_command_out_sync(tdev, TI_START_PORT,
488                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
489         if (status) {
490                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
491                                                         __func__, status);
492                 goto unlink_int_urb;
493         }
494 
495         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
496         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
497                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
498         if (status) {
499                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
500                                                         __func__, status);
501                 goto unlink_int_urb;
502         }
503         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
504                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
505         if (status) {
506                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
507                                                         __func__, status);
508                 goto unlink_int_urb;
509         }
510 
511         /* reset the data toggle on the bulk endpoints to work around bug in
512          * host controllers where things get out of sync some times */
513         usb_clear_halt(dev, port->write_urb->pipe);
514         usb_clear_halt(dev, port->read_urb->pipe);
515 
516         if (tty)
517                 ti_set_termios(tty, port, &tty->termios);
518 
519         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
520         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
521                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
522         if (status) {
523                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
524                                                         __func__, status);
525                 goto unlink_int_urb;
526         }
527 
528         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
529         status = ti_command_out_sync(tdev, TI_START_PORT,
530                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
531         if (status) {
532                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
533                                                         __func__, status);
534                 goto unlink_int_urb;
535         }
536 
537         /* start read urb */
538         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
539         urb = port->read_urb;
540         if (!urb) {
541                 dev_err(&port->dev, "%s - no read urb\n", __func__);
542                 status = -EINVAL;
543                 goto unlink_int_urb;
544         }
545         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
546         urb->context = tport;
547         status = usb_submit_urb(urb, GFP_KERNEL);
548         if (status) {
549                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
550                                                         __func__, status);
551                 goto unlink_int_urb;
552         }
553 
554         tport->tp_is_open = 1;
555         ++tdev->td_open_port_count;
556 
557         goto release_lock;
558 
559 unlink_int_urb:
560         if (tdev->td_open_port_count == 0)
561                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
562 release_lock:
563         mutex_unlock(&tdev->td_open_close_lock);
564         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
565         return status;
566 }
567 
568 
569 static void ti_close(struct usb_serial_port *port)
570 {
571         struct ti_device *tdev;
572         struct ti_port *tport;
573         int port_number;
574         int status;
575         int do_unlock;
576         unsigned long flags;
577 
578         tdev = usb_get_serial_data(port->serial);
579         tport = usb_get_serial_port_data(port);
580         if (tdev == NULL || tport == NULL)
581                 return;
582 
583         tport->tp_is_open = 0;
584 
585         usb_kill_urb(port->read_urb);
586         usb_kill_urb(port->write_urb);
587         tport->tp_write_urb_in_use = 0;
588         spin_lock_irqsave(&tport->tp_lock, flags);
589         kfifo_reset_out(&port->write_fifo);
590         spin_unlock_irqrestore(&tport->tp_lock, flags);
591 
592         port_number = port->port_number;
593 
594         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
595         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
596                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
597         if (status)
598                 dev_err(&port->dev,
599                         "%s - cannot send close port command, %d\n"
600                                                         , __func__, status);
601 
602         /* if mutex_lock is interrupted, continue anyway */
603         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
604         --tport->tp_tdev->td_open_port_count;
605         if (tport->tp_tdev->td_open_port_count <= 0) {
606                 /* last port is closed, shut down interrupt urb */
607                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
608                 tport->tp_tdev->td_open_port_count = 0;
609         }
610         if (do_unlock)
611                 mutex_unlock(&tdev->td_open_close_lock);
612 }
613 
614 
615 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
616                         const unsigned char *data, int count)
617 {
618         struct ti_port *tport = usb_get_serial_port_data(port);
619 
620         if (count == 0) {
621                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
622                 return 0;
623         }
624 
625         if (tport == NULL || !tport->tp_is_open)
626                 return -ENODEV;
627 
628         count = kfifo_in_locked(&port->write_fifo, data, count,
629                                                         &tport->tp_lock);
630         ti_send(tport);
631 
632         return count;
633 }
634 
635 
636 static int ti_write_room(struct tty_struct *tty)
637 {
638         struct usb_serial_port *port = tty->driver_data;
639         struct ti_port *tport = usb_get_serial_port_data(port);
640         int room = 0;
641         unsigned long flags;
642 
643         if (tport == NULL)
644                 return 0;
645 
646         spin_lock_irqsave(&tport->tp_lock, flags);
647         room = kfifo_avail(&port->write_fifo);
648         spin_unlock_irqrestore(&tport->tp_lock, flags);
649 
650         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
651         return room;
652 }
653 
654 
655 static int ti_chars_in_buffer(struct tty_struct *tty)
656 {
657         struct usb_serial_port *port = tty->driver_data;
658         struct ti_port *tport = usb_get_serial_port_data(port);
659         int chars = 0;
660         unsigned long flags;
661 
662         if (tport == NULL)
663                 return 0;
664 
665         spin_lock_irqsave(&tport->tp_lock, flags);
666         chars = kfifo_len(&port->write_fifo);
667         spin_unlock_irqrestore(&tport->tp_lock, flags);
668 
669         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
670         return chars;
671 }
672 
673 static bool ti_tx_empty(struct usb_serial_port *port)
674 {
675         struct ti_port *tport = usb_get_serial_port_data(port);
676         int ret;
677         u8 lsr;
678 
679         ret = ti_get_lsr(tport, &lsr);
680         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
681                 return false;
682 
683         return true;
684 }
685 
686 static void ti_throttle(struct tty_struct *tty)
687 {
688         struct usb_serial_port *port = tty->driver_data;
689         struct ti_port *tport = usb_get_serial_port_data(port);
690 
691         if (tport == NULL)
692                 return;
693 
694         if (I_IXOFF(tty) || C_CRTSCTS(tty))
695                 ti_stop_read(tport, tty);
696 
697 }
698 
699 
700 static void ti_unthrottle(struct tty_struct *tty)
701 {
702         struct usb_serial_port *port = tty->driver_data;
703         struct ti_port *tport = usb_get_serial_port_data(port);
704         int status;
705 
706         if (tport == NULL)
707                 return;
708 
709         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
710                 status = ti_restart_read(tport, tty);
711                 if (status)
712                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
713                                                         __func__, status);
714         }
715 }
716 
717 static int ti_ioctl(struct tty_struct *tty,
718         unsigned int cmd, unsigned long arg)
719 {
720         struct usb_serial_port *port = tty->driver_data;
721         struct ti_port *tport = usb_get_serial_port_data(port);
722 
723         if (tport == NULL)
724                 return -ENODEV;
725 
726         switch (cmd) {
727         case TIOCGSERIAL:
728                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
729                 return ti_get_serial_info(tport,
730                                 (struct serial_struct __user *)arg);
731         case TIOCSSERIAL:
732                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
733                 return ti_set_serial_info(tty, tport,
734                                 (struct serial_struct __user *)arg);
735         }
736         return -ENOIOCTLCMD;
737 }
738 
739 
740 static void ti_set_termios(struct tty_struct *tty,
741                 struct usb_serial_port *port, struct ktermios *old_termios)
742 {
743         struct ti_port *tport = usb_get_serial_port_data(port);
744         struct ti_uart_config *config;
745         tcflag_t cflag, iflag;
746         int baud;
747         int status;
748         int port_number = port->port_number;
749         unsigned int mcr;
750 
751         cflag = tty->termios.c_cflag;
752         iflag = tty->termios.c_iflag;
753 
754         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
755         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
756                 old_termios->c_cflag, old_termios->c_iflag);
757 
758         if (tport == NULL)
759                 return;
760 
761         config = kmalloc(sizeof(*config), GFP_KERNEL);
762         if (!config)
763                 return;
764 
765         config->wFlags = 0;
766 
767         /* these flags must be set */
768         config->wFlags |= TI_UART_ENABLE_MS_INTS;
769         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
770         config->bUartMode = (__u8)(tport->tp_uart_mode);
771 
772         switch (cflag & CSIZE) {
773         case CS5:
774                     config->bDataBits = TI_UART_5_DATA_BITS;
775                     break;
776         case CS6:
777                     config->bDataBits = TI_UART_6_DATA_BITS;
778                     break;
779         case CS7:
780                     config->bDataBits = TI_UART_7_DATA_BITS;
781                     break;
782         default:
783         case CS8:
784                     config->bDataBits = TI_UART_8_DATA_BITS;
785                     break;
786         }
787 
788         /* CMSPAR isn't supported by this driver */
789         tty->termios.c_cflag &= ~CMSPAR;
790 
791         if (cflag & PARENB) {
792                 if (cflag & PARODD) {
793                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
794                         config->bParity = TI_UART_ODD_PARITY;
795                 } else {
796                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
797                         config->bParity = TI_UART_EVEN_PARITY;
798                 }
799         } else {
800                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
801                 config->bParity = TI_UART_NO_PARITY;
802         }
803 
804         if (cflag & CSTOPB)
805                 config->bStopBits = TI_UART_2_STOP_BITS;
806         else
807                 config->bStopBits = TI_UART_1_STOP_BITS;
808 
809         if (cflag & CRTSCTS) {
810                 /* RTS flow control must be off to drop RTS for baud rate B0 */
811                 if ((cflag & CBAUD) != B0)
812                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
813                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
814         } else {
815                 ti_restart_read(tport, tty);
816         }
817 
818         if (I_IXOFF(tty) || I_IXON(tty)) {
819                 config->cXon  = START_CHAR(tty);
820                 config->cXoff = STOP_CHAR(tty);
821 
822                 if (I_IXOFF(tty))
823                         config->wFlags |= TI_UART_ENABLE_X_IN;
824                 else
825                         ti_restart_read(tport, tty);
826 
827                 if (I_IXON(tty))
828                         config->wFlags |= TI_UART_ENABLE_X_OUT;
829         }
830 
831         baud = tty_get_baud_rate(tty);
832         if (!baud)
833                 baud = 9600;
834         if (tport->tp_tdev->td_is_3410)
835                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
836         else
837                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
838 
839         /* FIXME: Should calculate resulting baud here and report it back */
840         if ((cflag & CBAUD) != B0)
841                 tty_encode_baud_rate(tty, baud, baud);
842 
843         dev_dbg(&port->dev,
844                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
845                 __func__, baud, config->wBaudRate, config->wFlags,
846                 config->bDataBits, config->bParity, config->bStopBits,
847                 config->cXon, config->cXoff, config->bUartMode);
848 
849         cpu_to_be16s(&config->wBaudRate);
850         cpu_to_be16s(&config->wFlags);
851 
852         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
853                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
854                 sizeof(*config));
855         if (status)
856                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
857                                         __func__, port_number, status);
858 
859         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
860         mcr = tport->tp_shadow_mcr;
861         /* if baud rate is B0, clear RTS and DTR */
862         if ((cflag & CBAUD) == B0)
863                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
864         status = ti_set_mcr(tport, mcr);
865         if (status)
866                 dev_err(&port->dev,
867                         "%s - cannot set modem control on port %d, %d\n",
868                                                 __func__, port_number, status);
869 
870         kfree(config);
871 }
872 
873 
874 static int ti_tiocmget(struct tty_struct *tty)
875 {
876         struct usb_serial_port *port = tty->driver_data;
877         struct ti_port *tport = usb_get_serial_port_data(port);
878         unsigned int result;
879         unsigned int msr;
880         unsigned int mcr;
881         unsigned long flags;
882 
883         if (tport == NULL)
884                 return -ENODEV;
885 
886         spin_lock_irqsave(&tport->tp_lock, flags);
887         msr = tport->tp_msr;
888         mcr = tport->tp_shadow_mcr;
889         spin_unlock_irqrestore(&tport->tp_lock, flags);
890 
891         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
892                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
893                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
894                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
895                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
896                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
897                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
898 
899         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
900 
901         return result;
902 }
903 
904 
905 static int ti_tiocmset(struct tty_struct *tty,
906                                 unsigned int set, unsigned int clear)
907 {
908         struct usb_serial_port *port = tty->driver_data;
909         struct ti_port *tport = usb_get_serial_port_data(port);
910         unsigned int mcr;
911         unsigned long flags;
912 
913         if (tport == NULL)
914                 return -ENODEV;
915 
916         spin_lock_irqsave(&tport->tp_lock, flags);
917         mcr = tport->tp_shadow_mcr;
918 
919         if (set & TIOCM_RTS)
920                 mcr |= TI_MCR_RTS;
921         if (set & TIOCM_DTR)
922                 mcr |= TI_MCR_DTR;
923         if (set & TIOCM_LOOP)
924                 mcr |= TI_MCR_LOOP;
925 
926         if (clear & TIOCM_RTS)
927                 mcr &= ~TI_MCR_RTS;
928         if (clear & TIOCM_DTR)
929                 mcr &= ~TI_MCR_DTR;
930         if (clear & TIOCM_LOOP)
931                 mcr &= ~TI_MCR_LOOP;
932         spin_unlock_irqrestore(&tport->tp_lock, flags);
933 
934         return ti_set_mcr(tport, mcr);
935 }
936 
937 
938 static void ti_break(struct tty_struct *tty, int break_state)
939 {
940         struct usb_serial_port *port = tty->driver_data;
941         struct ti_port *tport = usb_get_serial_port_data(port);
942         int status;
943 
944         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
945 
946         if (tport == NULL)
947                 return;
948 
949         status = ti_write_byte(port, tport->tp_tdev,
950                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
951                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
952 
953         if (status)
954                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
955 }
956 
957 
958 static void ti_interrupt_callback(struct urb *urb)
959 {
960         struct ti_device *tdev = urb->context;
961         struct usb_serial_port *port;
962         struct usb_serial *serial = tdev->td_serial;
963         struct ti_port *tport;
964         struct device *dev = &urb->dev->dev;
965         unsigned char *data = urb->transfer_buffer;
966         int length = urb->actual_length;
967         int port_number;
968         int function;
969         int status = urb->status;
970         int retval;
971         __u8 msr;
972 
973         switch (status) {
974         case 0:
975                 break;
976         case -ECONNRESET:
977         case -ENOENT:
978         case -ESHUTDOWN:
979                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
980                 tdev->td_urb_error = 1;
981                 return;
982         default:
983                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
984                 tdev->td_urb_error = 1;
985                 goto exit;
986         }
987 
988         if (length != 2) {
989                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
990                 goto exit;
991         }
992 
993         if (data[0] == TI_CODE_HARDWARE_ERROR) {
994                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
995                 goto exit;
996         }
997 
998         port_number = TI_GET_PORT_FROM_CODE(data[0]);
999         function = TI_GET_FUNC_FROM_CODE(data[0]);
1000 
1001         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1002                 __func__, port_number, function, data[1]);
1003 
1004         if (port_number >= serial->num_ports) {
1005                 dev_err(dev, "%s - bad port number, %d\n",
1006                                                 __func__, port_number);
1007                 goto exit;
1008         }
1009 
1010         port = serial->port[port_number];
1011 
1012         tport = usb_get_serial_port_data(port);
1013         if (!tport)
1014                 goto exit;
1015 
1016         switch (function) {
1017         case TI_CODE_DATA_ERROR:
1018                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1019                         __func__, port_number, data[1]);
1020                 break;
1021 
1022         case TI_CODE_MODEM_STATUS:
1023                 msr = data[1];
1024                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1025                 ti_handle_new_msr(tport, msr);
1026                 break;
1027 
1028         default:
1029                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1030                                                         __func__, data[1]);
1031                 break;
1032         }
1033 
1034 exit:
1035         retval = usb_submit_urb(urb, GFP_ATOMIC);
1036         if (retval)
1037                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1038                         __func__, retval);
1039 }
1040 
1041 
1042 static void ti_bulk_in_callback(struct urb *urb)
1043 {
1044         struct ti_port *tport = urb->context;
1045         struct usb_serial_port *port = tport->tp_port;
1046         struct device *dev = &urb->dev->dev;
1047         int status = urb->status;
1048         int retval = 0;
1049 
1050         switch (status) {
1051         case 0:
1052                 break;
1053         case -ECONNRESET:
1054         case -ENOENT:
1055         case -ESHUTDOWN:
1056                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1057                 tport->tp_tdev->td_urb_error = 1;
1058                 return;
1059         default:
1060                 dev_err(dev, "%s - nonzero urb status, %d\n",
1061                         __func__, status);
1062                 tport->tp_tdev->td_urb_error = 1;
1063         }
1064 
1065         if (status == -EPIPE)
1066                 goto exit;
1067 
1068         if (status) {
1069                 dev_err(dev, "%s - stopping read!\n", __func__);
1070                 return;
1071         }
1072 
1073         if (urb->actual_length) {
1074                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1075                                       urb->transfer_buffer);
1076 
1077                 if (!tport->tp_is_open)
1078                         dev_dbg(dev, "%s - port closed, dropping data\n",
1079                                 __func__);
1080                 else
1081                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1082                 spin_lock(&tport->tp_lock);
1083                 port->icount.rx += urb->actual_length;
1084                 spin_unlock(&tport->tp_lock);
1085         }
1086 
1087 exit:
1088         /* continue to read unless stopping */
1089         spin_lock(&tport->tp_lock);
1090         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1091                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1092         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1093                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1094 
1095         spin_unlock(&tport->tp_lock);
1096         if (retval)
1097                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1098                         __func__, retval);
1099 }
1100 
1101 
1102 static void ti_bulk_out_callback(struct urb *urb)
1103 {
1104         struct ti_port *tport = urb->context;
1105         struct usb_serial_port *port = tport->tp_port;
1106         int status = urb->status;
1107 
1108         tport->tp_write_urb_in_use = 0;
1109 
1110         switch (status) {
1111         case 0:
1112                 break;
1113         case -ECONNRESET:
1114         case -ENOENT:
1115         case -ESHUTDOWN:
1116                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1117                 tport->tp_tdev->td_urb_error = 1;
1118                 return;
1119         default:
1120                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1121                         __func__, status);
1122                 tport->tp_tdev->td_urb_error = 1;
1123         }
1124 
1125         /* send any buffered data */
1126         ti_send(tport);
1127 }
1128 
1129 
1130 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1131                 int length)
1132 {
1133         int cnt;
1134 
1135         do {
1136                 cnt = tty_insert_flip_string(&port->port, data, length);
1137                 if (cnt < length) {
1138                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1139                                                 __func__, length - cnt);
1140                         if (cnt == 0)
1141                                 break;
1142                 }
1143                 tty_flip_buffer_push(&port->port);
1144                 data += cnt;
1145                 length -= cnt;
1146         } while (length > 0);
1147 }
1148 
1149 
1150 static void ti_send(struct ti_port *tport)
1151 {
1152         int count, result;
1153         struct usb_serial_port *port = tport->tp_port;
1154         unsigned long flags;
1155 
1156         spin_lock_irqsave(&tport->tp_lock, flags);
1157 
1158         if (tport->tp_write_urb_in_use)
1159                 goto unlock;
1160 
1161         count = kfifo_out(&port->write_fifo,
1162                                 port->write_urb->transfer_buffer,
1163                                 port->bulk_out_size);
1164 
1165         if (count == 0)
1166                 goto unlock;
1167 
1168         tport->tp_write_urb_in_use = 1;
1169 
1170         spin_unlock_irqrestore(&tport->tp_lock, flags);
1171 
1172         usb_serial_debug_data(&port->dev, __func__, count,
1173                               port->write_urb->transfer_buffer);
1174 
1175         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1176                            usb_sndbulkpipe(port->serial->dev,
1177                                             port->bulk_out_endpointAddress),
1178                            port->write_urb->transfer_buffer, count,
1179                            ti_bulk_out_callback, tport);
1180 
1181         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1182         if (result) {
1183                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1184                                                         __func__, result);
1185                 tport->tp_write_urb_in_use = 0;
1186                 /* TODO: reschedule ti_send */
1187         } else {
1188                 spin_lock_irqsave(&tport->tp_lock, flags);
1189                 port->icount.tx += count;
1190                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1191         }
1192 
1193         /* more room in the buffer for new writes, wakeup */
1194         tty_port_tty_wakeup(&port->port);
1195 
1196         return;
1197 unlock:
1198         spin_unlock_irqrestore(&tport->tp_lock, flags);
1199         return;
1200 }
1201 
1202 
1203 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1204 {
1205         unsigned long flags;
1206         int status;
1207 
1208         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1209                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1210                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1211 
1212         spin_lock_irqsave(&tport->tp_lock, flags);
1213         if (!status)
1214                 tport->tp_shadow_mcr = mcr;
1215         spin_unlock_irqrestore(&tport->tp_lock, flags);
1216 
1217         return status;
1218 }
1219 
1220 
1221 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1222 {
1223         int size, status;
1224         struct ti_device *tdev = tport->tp_tdev;
1225         struct usb_serial_port *port = tport->tp_port;
1226         int port_number = port->port_number;
1227         struct ti_port_status *data;
1228 
1229         size = sizeof(struct ti_port_status);
1230         data = kmalloc(size, GFP_KERNEL);
1231         if (!data)
1232                 return -ENOMEM;
1233 
1234         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1235                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1236         if (status) {
1237                 dev_err(&port->dev,
1238                         "%s - get port status command failed, %d\n",
1239                                                         __func__, status);
1240                 goto free_data;
1241         }
1242 
1243         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1244 
1245         *lsr = data->bLSR;
1246 
1247 free_data:
1248         kfree(data);
1249         return status;
1250 }
1251 
1252 
1253 static int ti_get_serial_info(struct ti_port *tport,
1254         struct serial_struct __user *ret_arg)
1255 {
1256         struct usb_serial_port *port = tport->tp_port;
1257         struct serial_struct ret_serial;
1258         unsigned cwait;
1259 
1260         if (!ret_arg)
1261                 return -EFAULT;
1262 
1263         cwait = port->port.closing_wait;
1264         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1265                 cwait = jiffies_to_msecs(cwait) / 10;
1266 
1267         memset(&ret_serial, 0, sizeof(ret_serial));
1268 
1269         ret_serial.type = PORT_16550A;
1270         ret_serial.line = port->minor;
1271         ret_serial.port = port->port_number;
1272         ret_serial.flags = tport->tp_flags;
1273         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1274         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1275         ret_serial.closing_wait = cwait;
1276 
1277         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1278                 return -EFAULT;
1279 
1280         return 0;
1281 }
1282 
1283 
1284 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1285         struct serial_struct __user *new_arg)
1286 {
1287         struct serial_struct new_serial;
1288         unsigned cwait;
1289 
1290         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1291                 return -EFAULT;
1292 
1293         cwait = new_serial.closing_wait;
1294         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1295                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1296 
1297         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1298         tport->tp_port->port.closing_wait = cwait;
1299 
1300         return 0;
1301 }
1302 
1303 
1304 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1305 {
1306         struct async_icount *icount;
1307         struct tty_struct *tty;
1308         unsigned long flags;
1309 
1310         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1311 
1312         if (msr & TI_MSR_DELTA_MASK) {
1313                 spin_lock_irqsave(&tport->tp_lock, flags);
1314                 icount = &tport->tp_port->icount;
1315                 if (msr & TI_MSR_DELTA_CTS)
1316                         icount->cts++;
1317                 if (msr & TI_MSR_DELTA_DSR)
1318                         icount->dsr++;
1319                 if (msr & TI_MSR_DELTA_CD)
1320                         icount->dcd++;
1321                 if (msr & TI_MSR_DELTA_RI)
1322                         icount->rng++;
1323                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1324                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1325         }
1326 
1327         tport->tp_msr = msr & TI_MSR_MASK;
1328 
1329         /* handle CTS flow control */
1330         tty = tty_port_tty_get(&tport->tp_port->port);
1331         if (tty && C_CRTSCTS(tty)) {
1332                 if (msr & TI_MSR_CTS)
1333                         tty_wakeup(tty);
1334         }
1335         tty_kref_put(tty);
1336 }
1337 
1338 
1339 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1340 {
1341         unsigned long flags;
1342 
1343         spin_lock_irqsave(&tport->tp_lock, flags);
1344 
1345         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1346                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1347 
1348         spin_unlock_irqrestore(&tport->tp_lock, flags);
1349 }
1350 
1351 
1352 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1353 {
1354         struct urb *urb;
1355         int status = 0;
1356         unsigned long flags;
1357 
1358         spin_lock_irqsave(&tport->tp_lock, flags);
1359 
1360         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1361                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1362                 urb = tport->tp_port->read_urb;
1363                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1364                 urb->context = tport;
1365                 status = usb_submit_urb(urb, GFP_KERNEL);
1366         } else  {
1367                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1368                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1369         }
1370 
1371         return status;
1372 }
1373 
1374 
1375 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1376         __u16 moduleid, __u16 value, __u8 *data, int size)
1377 {
1378         int status;
1379 
1380         status = usb_control_msg(tdev->td_serial->dev,
1381                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1382                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1383                 value, moduleid, data, size, 1000);
1384 
1385         if (status == size)
1386                 status = 0;
1387 
1388         if (status > 0)
1389                 status = -ECOMM;
1390 
1391         return status;
1392 }
1393 
1394 
1395 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1396         __u16 moduleid, __u16 value, __u8 *data, int size)
1397 {
1398         int status;
1399 
1400         status = usb_control_msg(tdev->td_serial->dev,
1401                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1402                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1403                 value, moduleid, data, size, 1000);
1404 
1405         if (status == size)
1406                 status = 0;
1407 
1408         if (status > 0)
1409                 status = -ECOMM;
1410 
1411         return status;
1412 }
1413 
1414 
1415 static int ti_write_byte(struct usb_serial_port *port,
1416                         struct ti_device *tdev, unsigned long addr,
1417                         __u8 mask, __u8 byte)
1418 {
1419         int status;
1420         unsigned int size;
1421         struct ti_write_data_bytes *data;
1422 
1423         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1424                 addr, mask, byte);
1425 
1426         size = sizeof(struct ti_write_data_bytes) + 2;
1427         data = kmalloc(size, GFP_KERNEL);
1428         if (!data)
1429                 return -ENOMEM;
1430 
1431         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1432         data->bDataType = TI_RW_DATA_BYTE;
1433         data->bDataCounter = 1;
1434         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1435         data->wBaseAddrLo = cpu_to_be16(addr);
1436         data->bData[0] = mask;
1437         data->bData[1] = byte;
1438 
1439         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1440                 (__u8 *)data, size);
1441 
1442         if (status < 0)
1443                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1444 
1445         kfree(data);
1446 
1447         return status;
1448 }
1449 
1450 static int ti_do_download(struct usb_device *dev, int pipe,
1451                                                 u8 *buffer, int size)
1452 {
1453         int pos;
1454         u8 cs = 0;
1455         int done;
1456         struct ti_firmware_header *header;
1457         int status = 0;
1458         int len;
1459 
1460         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1461                 cs = (__u8)(cs + buffer[pos]);
1462 
1463         header = (struct ti_firmware_header *)buffer;
1464         header->wLength = cpu_to_le16((__u16)(size
1465                                         - sizeof(struct ti_firmware_header)));
1466         header->bCheckSum = cs;
1467 
1468         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1469         for (pos = 0; pos < size; pos += done) {
1470                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1471                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1472                                                                 &done, 1000);
1473                 if (status)
1474                         break;
1475         }
1476         return status;
1477 }
1478 
1479 static int ti_download_firmware(struct ti_device *tdev)
1480 {
1481         int status;
1482         int buffer_size;
1483         __u8 *buffer;
1484         struct usb_device *dev = tdev->td_serial->dev;
1485         unsigned int pipe = usb_sndbulkpipe(dev,
1486                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1487         const struct firmware *fw_p;
1488         char buf[32];
1489 
1490         if (le16_to_cpu(dev->descriptor.idVendor) == MXU1_VENDOR_ID) {
1491                 snprintf(buf,
1492                         sizeof(buf),
1493                         "moxa/moxa-%04x.fw",
1494                         le16_to_cpu(dev->descriptor.idProduct));
1495 
1496                 status = request_firmware(&fw_p, buf, &dev->dev);
1497                 goto check_firmware;
1498         }
1499 
1500         /* try ID specific firmware first, then try generic firmware */
1501         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1502                         le16_to_cpu(dev->descriptor.idVendor),
1503                         le16_to_cpu(dev->descriptor.idProduct));
1504         status = request_firmware(&fw_p, buf, &dev->dev);
1505 
1506         if (status != 0) {
1507                 buf[0] = '\0';
1508                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1509                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1510                         case MTS_CDMA_PRODUCT_ID:
1511                                 strcpy(buf, "mts_cdma.fw");
1512                                 break;
1513                         case MTS_GSM_PRODUCT_ID:
1514                                 strcpy(buf, "mts_gsm.fw");
1515                                 break;
1516                         case MTS_EDGE_PRODUCT_ID:
1517                                 strcpy(buf, "mts_edge.fw");
1518                                 break;
1519                         case MTS_MT9234MU_PRODUCT_ID:
1520                                 strcpy(buf, "mts_mt9234mu.fw");
1521                                 break;
1522                         case MTS_MT9234ZBA_PRODUCT_ID:
1523                                 strcpy(buf, "mts_mt9234zba.fw");
1524                                 break;
1525                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1526                                 strcpy(buf, "mts_mt9234zba.fw");
1527                                 break;                  }
1528                 }
1529                 if (buf[0] == '\0') {
1530                         if (tdev->td_is_3410)
1531                                 strcpy(buf, "ti_3410.fw");
1532                         else
1533                                 strcpy(buf, "ti_5052.fw");
1534                 }
1535                 status = request_firmware(&fw_p, buf, &dev->dev);
1536         }
1537 
1538 check_firmware:
1539         if (status) {
1540                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1541                 return -ENOENT;
1542         }
1543         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1544                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1545                 release_firmware(fw_p);
1546                 return -ENOENT;
1547         }
1548 
1549         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1550         buffer = kmalloc(buffer_size, GFP_KERNEL);
1551         if (buffer) {
1552                 memcpy(buffer, fw_p->data, fw_p->size);
1553                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1554                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1555                 kfree(buffer);
1556         } else {
1557                 status = -ENOMEM;
1558         }
1559         release_firmware(fw_p);
1560         if (status) {
1561                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1562                                                         __func__, status);
1563                 return status;
1564         }
1565 
1566         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1567 
1568         return 0;
1569 }
1570 

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