[PATCH] getting rid of all casts of k[cmz]alloc() calls
[linux-2.6.git] / drivers / usb / serial / ti_usb_3410_5052.c
1 /* vi: ts=8 sw=8
2  *
3  * TI 3410/5052 USB Serial Driver
4  *
5  * Copyright (C) 2004 Texas Instruments
6  *
7  * This driver is based on the Linux io_ti driver, which is
8  *   Copyright (C) 2000-2002 Inside Out Networks
9  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * For questions or problems with this driver, contact Texas Instruments
17  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18  * Peter Berger <pberger@brimson.com>.
19  * 
20  * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
21  * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
22  * configuration.
23  *
24  * #!/bin/bash
25  *
26  * BOOT_CONFIG=1
27  * ACTIVE_CONFIG=2
28  *
29  * if [[ "$ACTION" != "add" ]]
30  * then
31  *      exit
32  * fi
33  *
34  * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
35  *
36  * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
37  * then
38  *      exit
39  * fi
40  *
41  * PRODUCT=${PRODUCT%/?*}               # delete version
42  * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
43  * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
44  *
45  * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
46  *
47  * function scan() {
48  *      s=$1
49  *      shift
50  *      for i
51  *      do
52  *              if [[ $s -eq $i ]]
53  *              then
54  *                      return 0
55  *              fi
56  *      done
57  *      return 1
58  * }
59  *
60  * IFS=$IFS,
61  *
62  * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
63  * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
64  * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
65  * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
66  * then
67  *      echo $ACTIVE_CONFIG > $CONFIG_PATH
68  * fi
69  */
70
71 #include <linux/kernel.h>
72 #include <linux/errno.h>
73 #include <linux/init.h>
74 #include <linux/slab.h>
75 #include <linux/tty.h>
76 #include <linux/tty_driver.h>
77 #include <linux/tty_flip.h>
78 #include <linux/module.h>
79 #include <linux/spinlock.h>
80 #include <linux/ioctl.h>
81 #include <linux/serial.h>
82 #include <linux/circ_buf.h>
83 #include <asm/uaccess.h>
84 #include <asm/semaphore.h>
85 #include <linux/usb.h>
86 #include <linux/usb/serial.h>
87
88 #include "ti_usb_3410_5052.h"
89 #include "ti_fw_3410.h"         /* firmware image for 3410 */
90 #include "ti_fw_5052.h"         /* firmware image for 5052 */
91
92
93 /* Defines */
94
95 #define TI_DRIVER_VERSION       "v0.9"
96 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
97 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
98
99 #define TI_FIRMWARE_BUF_SIZE    16284
100
101 #define TI_WRITE_BUF_SIZE       1024
102
103 #define TI_TRANSFER_TIMEOUT     2
104
105 #define TI_DEFAULT_LOW_LATENCY  0
106 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
107
108 /* supported setserial flags */
109 #define TI_SET_SERIAL_FLAGS     (ASYNC_LOW_LATENCY)
110
111 /* read urb states */
112 #define TI_READ_URB_RUNNING     0
113 #define TI_READ_URB_STOPPING    1
114 #define TI_READ_URB_STOPPED     2
115
116 #define TI_EXTRA_VID_PID_COUNT  5
117
118
119 /* Structures */
120
121 struct ti_port {
122         int                     tp_is_open;
123         __u8                    tp_msr;
124         __u8                    tp_lsr;
125         __u8                    tp_shadow_mcr;
126         __u8                    tp_uart_mode;   /* 232 or 485 modes */
127         unsigned int            tp_uart_base_addr;
128         int                     tp_flags;
129         int                     tp_closing_wait;/* in .01 secs */
130         struct async_icount     tp_icount;
131         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
132         wait_queue_head_t       tp_write_wait;
133         struct ti_device        *tp_tdev;
134         struct usb_serial_port  *tp_port;
135         spinlock_t              tp_lock;
136         int                     tp_read_urb_state;
137         int                     tp_write_urb_in_use;
138         struct circ_buf         *tp_write_buf;
139 };
140
141 struct ti_device {
142         struct semaphore        td_open_close_sem;
143         int                     td_open_port_count;
144         struct usb_serial       *td_serial;
145         int                     td_is_3410;
146         int                     td_urb_error;
147 };
148
149
150 /* Function Declarations */
151
152 static int ti_startup(struct usb_serial *serial);
153 static void ti_shutdown(struct usb_serial *serial);
154 static int ti_open(struct usb_serial_port *port, struct file *file);
155 static void ti_close(struct usb_serial_port *port, struct file *file);
156 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
157         int count);
158 static int ti_write_room(struct usb_serial_port *port);
159 static int ti_chars_in_buffer(struct usb_serial_port *port);
160 static void ti_throttle(struct usb_serial_port *port);
161 static void ti_unthrottle(struct usb_serial_port *port);
162 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
163 static void ti_set_termios(struct usb_serial_port *port,
164         struct ktermios *old_termios);
165 static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
166 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
167         unsigned int set, unsigned int clear);
168 static void ti_break(struct usb_serial_port *port, int break_state);
169 static void ti_interrupt_callback(struct urb *urb);
170 static void ti_bulk_in_callback(struct urb *urb);
171 static void ti_bulk_out_callback(struct urb *urb);
172
173 static void ti_recv(struct device *dev, struct tty_struct *tty,
174         unsigned char *data, int length);
175 static void ti_send(struct ti_port *tport);
176 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
177 static int ti_get_lsr(struct ti_port *tport);
178 static int ti_get_serial_info(struct ti_port *tport,
179         struct serial_struct __user *ret_arg);
180 static int ti_set_serial_info(struct ti_port *tport,
181         struct serial_struct __user *new_arg);
182 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
183
184 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
185
186 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
187 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
188
189 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
190         __u16 moduleid, __u16 value, __u8 *data, int size);
191 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
192         __u16 moduleid, __u16 value, __u8 *data, int size);
193
194 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
195         __u8 mask, __u8 byte);
196
197 static int ti_download_firmware(struct ti_device *tdev,
198         unsigned char *firmware, unsigned int firmware_size);
199
200 /* circular buffer */
201 static struct circ_buf *ti_buf_alloc(void);
202 static void ti_buf_free(struct circ_buf *cb);
203 static void ti_buf_clear(struct circ_buf *cb);
204 static int ti_buf_data_avail(struct circ_buf *cb);
205 static int ti_buf_space_avail(struct circ_buf *cb);
206 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
207 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
208
209
210 /* Data */
211
212 /* module parameters */
213 static int debug;
214 static int low_latency = TI_DEFAULT_LOW_LATENCY;
215 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
216 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
217 static int vendor_3410_count;
218 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
219 static int product_3410_count;
220 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
221 static int vendor_5052_count;
222 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
223 static int product_5052_count;
224
225 /* supported devices */
226 /* the array dimension is the number of default entries plus */
227 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
228 /* null entry */
229 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
230         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
231         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
232 };
233
234 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
235         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
236         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
237         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
238         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
239 };
240
241 static struct usb_device_id ti_id_table_combined[] = {
242         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
243         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
244         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
245         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
246         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
247         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
248         { }
249 };
250
251 static struct usb_driver ti_usb_driver = {
252         .name                   = "ti_usb_3410_5052",
253         .probe                  = usb_serial_probe,
254         .disconnect             = usb_serial_disconnect,
255         .id_table               = ti_id_table_combined,
256         .no_dynamic_id =        1,
257 };
258
259 static struct usb_serial_driver ti_1port_device = {
260         .driver = {
261                 .owner          = THIS_MODULE,
262                 .name           = "ti_usb_3410_5052_1",
263         },
264         .description            = "TI USB 3410 1 port adapter",
265         .id_table               = ti_id_table_3410,
266         .num_interrupt_in       = 1,
267         .num_bulk_in            = 1,
268         .num_bulk_out           = 1,
269         .num_ports              = 1,
270         .attach                 = ti_startup,
271         .shutdown               = ti_shutdown,
272         .open                   = ti_open,
273         .close                  = ti_close,
274         .write                  = ti_write,
275         .write_room             = ti_write_room,
276         .chars_in_buffer        = ti_chars_in_buffer,
277         .throttle               = ti_throttle,
278         .unthrottle             = ti_unthrottle,
279         .ioctl                  = ti_ioctl,
280         .set_termios            = ti_set_termios,
281         .tiocmget               = ti_tiocmget,
282         .tiocmset               = ti_tiocmset,
283         .break_ctl              = ti_break,
284         .read_int_callback      = ti_interrupt_callback,
285         .read_bulk_callback     = ti_bulk_in_callback,
286         .write_bulk_callback    = ti_bulk_out_callback,
287 };
288
289 static struct usb_serial_driver ti_2port_device = {
290         .driver = {
291                 .owner          = THIS_MODULE,
292                 .name           = "ti_usb_3410_5052_2",
293         },
294         .description            = "TI USB 5052 2 port adapter",
295         .id_table               = ti_id_table_5052,
296         .num_interrupt_in       = 1,
297         .num_bulk_in            = 2,
298         .num_bulk_out           = 2,
299         .num_ports              = 2,
300         .attach                 = ti_startup,
301         .shutdown               = ti_shutdown,
302         .open                   = ti_open,
303         .close                  = ti_close,
304         .write                  = ti_write,
305         .write_room             = ti_write_room,
306         .chars_in_buffer        = ti_chars_in_buffer,
307         .throttle               = ti_throttle,
308         .unthrottle             = ti_unthrottle,
309         .ioctl                  = ti_ioctl,
310         .set_termios            = ti_set_termios,
311         .tiocmget               = ti_tiocmget,
312         .tiocmset               = ti_tiocmset,
313         .break_ctl              = ti_break,
314         .read_int_callback      = ti_interrupt_callback,
315         .read_bulk_callback     = ti_bulk_in_callback,
316         .write_bulk_callback    = ti_bulk_out_callback,
317 };
318
319
320 /* Module */
321
322 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
323 MODULE_DESCRIPTION(TI_DRIVER_DESC);
324 MODULE_VERSION(TI_DRIVER_VERSION);
325 MODULE_LICENSE("GPL");
326
327 module_param(debug, bool, S_IRUGO | S_IWUSR);
328 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
329
330 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
331 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
332
333 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
334 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
335
336 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
337 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
338 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
339 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
340 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
341 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
342 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
343 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
344
345 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
346
347
348 /* Functions */
349
350 static int __init ti_init(void)
351 {
352         int i,j;
353         int ret;
354
355         /* insert extra vendor and product ids */
356         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
357         for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
358                 ti_id_table_3410[j].idVendor = vendor_3410[i];
359                 ti_id_table_3410[j].idProduct = product_3410[i];
360                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
361         }
362         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
363         for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
364                 ti_id_table_5052[j].idVendor = vendor_5052[i];
365                 ti_id_table_5052[j].idProduct = product_5052[i];
366                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
367         }
368
369         ret = usb_serial_register(&ti_1port_device);
370         if (ret)
371                 goto failed_1port;
372         ret = usb_serial_register(&ti_2port_device);
373         if (ret)
374                 goto failed_2port;
375
376         ret = usb_register(&ti_usb_driver);
377         if (ret)
378                 goto failed_usb;
379
380         info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
381
382         return 0;
383
384 failed_usb:
385         usb_serial_deregister(&ti_2port_device);
386 failed_2port:
387         usb_serial_deregister(&ti_1port_device);
388 failed_1port:
389         return ret;
390 }
391
392
393 static void __exit ti_exit(void)
394 {
395         usb_serial_deregister(&ti_1port_device);
396         usb_serial_deregister(&ti_2port_device);
397         usb_deregister(&ti_usb_driver);
398 }
399
400
401 module_init(ti_init);
402 module_exit(ti_exit);
403
404
405 static int ti_startup(struct usb_serial *serial)
406 {
407         struct ti_device *tdev;
408         struct ti_port *tport;
409         struct usb_device *dev = serial->dev;
410         int status;
411         int i;
412
413
414         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
415             __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
416             dev->descriptor.bNumConfigurations,
417             dev->actconfig->desc.bConfigurationValue);
418
419         /* create device structure */
420         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
421         if (tdev == NULL) {
422                 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
423                 return -ENOMEM;
424         }
425         sema_init(&tdev->td_open_close_sem, 1);
426         tdev->td_serial = serial;
427         usb_set_serial_data(serial, tdev);
428
429         /* determine device type */
430         if (usb_match_id(serial->interface, ti_id_table_3410))
431                 tdev->td_is_3410 = 1;
432         dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
433
434         /* if we have only 1 configuration, download firmware */
435         if (dev->descriptor.bNumConfigurations == 1) {
436
437                 if (tdev->td_is_3410)
438                         status = ti_download_firmware(tdev, ti_fw_3410,
439                                 sizeof(ti_fw_3410));
440                 else
441                         status = ti_download_firmware(tdev, ti_fw_5052,
442                                 sizeof(ti_fw_5052));
443                 if (status)
444                         goto free_tdev;
445
446                 /* 3410 must be reset, 5052 resets itself */
447                 if (tdev->td_is_3410) {
448                         msleep_interruptible(100);
449                         usb_reset_device(dev);
450                 }
451
452                 status = -ENODEV;
453                 goto free_tdev;
454         } 
455
456         /* the second configuration must be set (in sysfs by hotplug script) */
457         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
458                 status = -ENODEV;
459                 goto free_tdev;
460         }
461
462         /* set up port structures */
463         for (i = 0; i < serial->num_ports; ++i) {
464                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
465                 if (tport == NULL) {
466                         dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
467                         status = -ENOMEM;
468                         goto free_tports;
469                 }
470                 spin_lock_init(&tport->tp_lock);
471                 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
472                 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
473                 tport->tp_closing_wait = closing_wait;
474                 init_waitqueue_head(&tport->tp_msr_wait);
475                 init_waitqueue_head(&tport->tp_write_wait);
476                 tport->tp_write_buf = ti_buf_alloc();
477                 if (tport->tp_write_buf == NULL) {
478                         dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
479                         kfree(tport);
480                         status = -ENOMEM;
481                         goto free_tports;
482                 }
483                 tport->tp_port = serial->port[i];
484                 tport->tp_tdev = tdev;
485                 usb_set_serial_port_data(serial->port[i], tport);
486                 tport->tp_uart_mode = 0;        /* default is RS232 */
487         }
488         
489         return 0;
490
491 free_tports:
492         for (--i; i>=0; --i) {
493                 tport = usb_get_serial_port_data(serial->port[i]);
494                 ti_buf_free(tport->tp_write_buf);
495                 kfree(tport);
496                 usb_set_serial_port_data(serial->port[i], NULL);
497         }
498 free_tdev:
499         kfree(tdev);
500         usb_set_serial_data(serial, NULL);
501         return status;
502 }
503
504
505 static void ti_shutdown(struct usb_serial *serial)
506 {
507         int i;
508         struct ti_device *tdev = usb_get_serial_data(serial);
509         struct ti_port *tport;
510
511         dbg("%s", __FUNCTION__);
512
513         for (i=0; i < serial->num_ports; ++i) {
514                 tport = usb_get_serial_port_data(serial->port[i]);
515                 if (tport) {
516                         ti_buf_free(tport->tp_write_buf);
517                         kfree(tport);
518                         usb_set_serial_port_data(serial->port[i], NULL);
519                 }
520         }
521
522         kfree(tdev);
523         usb_set_serial_data(serial, NULL);
524 }
525
526
527 static int ti_open(struct usb_serial_port *port, struct file *file)
528 {
529         struct ti_port *tport = usb_get_serial_port_data(port);
530         struct ti_device *tdev;
531         struct usb_device *dev;
532         struct urb *urb;
533         int port_number;
534         int status;
535         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 
536                              TI_PIPE_TIMEOUT_ENABLE | 
537                              (TI_TRANSFER_TIMEOUT << 2));
538
539         dbg("%s - port %d", __FUNCTION__, port->number);
540
541         if (tport == NULL)
542                 return -ENODEV;
543
544         dev = port->serial->dev;
545         tdev = tport->tp_tdev;
546
547         /* only one open on any port on a device at a time */
548         if (down_interruptible(&tdev->td_open_close_sem))
549                 return -ERESTARTSYS;
550
551         if (port->tty)
552                 port->tty->low_latency = 
553                         (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
554
555         port_number = port->number - port->serial->minor;
556
557         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
558
559         tport->tp_msr = 0;
560         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
561
562         /* start interrupt urb the first time a port is opened on this device */
563         if (tdev->td_open_port_count == 0) {
564                 dbg("%s - start interrupt in urb", __FUNCTION__);
565                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
566                 if (!urb) {
567                         dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
568                         status = -EINVAL;
569                         goto up_sem;
570                 }
571                 urb->complete = ti_interrupt_callback;
572                 urb->context = tdev;
573                 urb->dev = dev;
574                 status = usb_submit_urb(urb, GFP_KERNEL);
575                 if (status) {
576                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
577                         goto up_sem;
578                 }
579         }
580
581         ti_set_termios(port, NULL);
582
583         dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
584         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
585                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
586         if (status) {
587                 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
588                 goto unlink_int_urb;
589         }
590
591         dbg("%s - sending TI_START_PORT", __FUNCTION__);
592         status = ti_command_out_sync(tdev, TI_START_PORT,
593                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
594         if (status) {
595                 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
596                 goto unlink_int_urb;
597         }
598
599         dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
600         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
601                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
602         if (status) {
603                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
604                 goto unlink_int_urb;
605         }
606         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
607                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
608         if (status) {
609                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
610                 goto unlink_int_urb;
611         }
612
613         /* reset the data toggle on the bulk endpoints to work around bug in
614          * host controllers where things get out of sync some times */
615         usb_clear_halt(dev, port->write_urb->pipe);
616         usb_clear_halt(dev, port->read_urb->pipe);
617
618         ti_set_termios(port, NULL);
619
620         dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
621         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
622                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
623         if (status) {
624                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
625                 goto unlink_int_urb;
626         }
627
628         dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
629         status = ti_command_out_sync(tdev, TI_START_PORT,
630                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
631         if (status) {
632                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
633                 goto unlink_int_urb;
634         }
635
636         /* start read urb */
637         dbg("%s - start read urb", __FUNCTION__);
638         urb = port->read_urb;
639         if (!urb) {
640                 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
641                 status = -EINVAL;
642                 goto unlink_int_urb;
643         }
644         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
645         urb->complete = ti_bulk_in_callback;
646         urb->context = tport;
647         urb->dev = dev;
648         status = usb_submit_urb(urb, GFP_KERNEL);
649         if (status) {
650                 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
651                 goto unlink_int_urb;
652         }
653
654         tport->tp_is_open = 1;
655         ++tdev->td_open_port_count;
656
657         goto up_sem;
658
659 unlink_int_urb:
660         if (tdev->td_open_port_count == 0)
661                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
662 up_sem:
663         up(&tdev->td_open_close_sem);
664         dbg("%s - exit %d", __FUNCTION__, status);
665         return status;
666 }
667
668
669 static void ti_close(struct usb_serial_port *port, struct file *file)
670 {
671         struct ti_device *tdev;
672         struct ti_port *tport;
673         int port_number;
674         int status;
675         int do_up;
676
677         dbg("%s - port %d", __FUNCTION__, port->number);
678                          
679         tdev = usb_get_serial_data(port->serial);
680         tport = usb_get_serial_port_data(port);
681         if (tdev == NULL || tport == NULL)
682                 return;
683
684         tport->tp_is_open = 0;
685
686         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
687
688         usb_kill_urb(port->read_urb);
689         usb_kill_urb(port->write_urb);
690         tport->tp_write_urb_in_use = 0;
691
692         port_number = port->number - port->serial->minor;
693
694         dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
695         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
696                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
697         if (status)
698                 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
699
700         /* if down is interrupted, continue anyway */
701         do_up = !down_interruptible(&tdev->td_open_close_sem);
702         --tport->tp_tdev->td_open_port_count;
703         if (tport->tp_tdev->td_open_port_count <= 0) {
704                 /* last port is closed, shut down interrupt urb */
705                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
706                 tport->tp_tdev->td_open_port_count = 0;
707         }
708         if (do_up)
709                 up(&tdev->td_open_close_sem);
710
711         dbg("%s - exit", __FUNCTION__);
712 }
713
714
715 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
716         int count)
717 {
718         struct ti_port *tport = usb_get_serial_port_data(port);
719         unsigned long flags;
720
721         dbg("%s - port %d", __FUNCTION__, port->number);
722
723         if (count == 0) {
724                 dbg("%s - write request of 0 bytes", __FUNCTION__);
725                 return 0;
726         }
727
728         if (tport == NULL || !tport->tp_is_open)
729                 return -ENODEV;
730
731         spin_lock_irqsave(&tport->tp_lock, flags);
732         count = ti_buf_put(tport->tp_write_buf, data, count);
733         spin_unlock_irqrestore(&tport->tp_lock, flags);
734
735         ti_send(tport);
736
737         return count;
738 }
739
740
741 static int ti_write_room(struct usb_serial_port *port)
742 {
743         struct ti_port *tport = usb_get_serial_port_data(port);
744         int room = 0;
745         unsigned long flags;
746
747         dbg("%s - port %d", __FUNCTION__, port->number);
748
749         if (tport == NULL)
750                 return -ENODEV;
751         
752         spin_lock_irqsave(&tport->tp_lock, flags);
753         room = ti_buf_space_avail(tport->tp_write_buf);
754         spin_unlock_irqrestore(&tport->tp_lock, flags);
755
756         dbg("%s - returns %d", __FUNCTION__, room);
757         return room;
758 }
759
760
761 static int ti_chars_in_buffer(struct usb_serial_port *port)
762 {
763         struct ti_port *tport = usb_get_serial_port_data(port);
764         int chars = 0;
765         unsigned long flags;
766
767         dbg("%s - port %d", __FUNCTION__, port->number);
768
769         if (tport == NULL)
770                 return -ENODEV;
771
772         spin_lock_irqsave(&tport->tp_lock, flags);
773         chars = ti_buf_data_avail(tport->tp_write_buf);
774         spin_unlock_irqrestore(&tport->tp_lock, flags);
775
776         dbg("%s - returns %d", __FUNCTION__, chars);
777         return chars;
778 }
779
780
781 static void ti_throttle(struct usb_serial_port *port)
782 {
783         struct ti_port *tport = usb_get_serial_port_data(port);
784         struct tty_struct *tty;
785
786         dbg("%s - port %d", __FUNCTION__, port->number);
787
788         if (tport == NULL)
789                 return;
790
791         tty = port->tty;
792         if (!tty) {
793                 dbg("%s - no tty", __FUNCTION__);
794                 return;
795         }
796
797         if (I_IXOFF(tty) || C_CRTSCTS(tty))
798                 ti_stop_read(tport, tty);
799
800 }
801
802
803 static void ti_unthrottle(struct usb_serial_port *port)
804 {
805         struct ti_port *tport = usb_get_serial_port_data(port);
806         struct tty_struct *tty;
807         int status;
808
809         dbg("%s - port %d", __FUNCTION__, port->number);
810
811         if (tport == NULL)
812                 return;
813
814         tty = port->tty;
815         if (!tty) {
816                 dbg("%s - no tty", __FUNCTION__);
817                 return;
818         }
819
820         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
821                 status = ti_restart_read(tport, tty);
822                 if (status)
823                         dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
824         }
825 }
826
827
828 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
829         unsigned int cmd, unsigned long arg)
830 {
831         struct ti_port *tport = usb_get_serial_port_data(port);
832         struct async_icount cnow;
833         struct async_icount cprev;
834
835         dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
836
837         if (tport == NULL)
838                 return -ENODEV;
839
840         switch (cmd) {
841                 case TIOCGSERIAL:
842                         dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
843                         return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
844                         break;
845
846                 case TIOCSSERIAL:
847                         dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
848                         return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
849                         break;
850
851                 case TIOCMIWAIT:
852                         dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
853                         cprev = tport->tp_icount;
854                         while (1) {
855                                 interruptible_sleep_on(&tport->tp_msr_wait);
856                                 if (signal_pending(current))
857                                         return -ERESTARTSYS;
858                                 cnow = tport->tp_icount;
859                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
860                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
861                                         return -EIO; /* no change => error */
862                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
863                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
864                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
865                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
866                                         return 0;
867                                 }
868                                 cprev = cnow;
869                         }
870                         break;
871
872                 case TIOCGICOUNT:
873                         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
874                         if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
875                                 return -EFAULT;
876                         return 0;
877         }
878
879         return -ENOIOCTLCMD;
880 }
881
882
883 static void ti_set_termios(struct usb_serial_port *port,
884         struct ktermios *old_termios)
885 {
886         struct ti_port *tport = usb_get_serial_port_data(port);
887         struct tty_struct *tty = port->tty;
888         struct ti_uart_config *config;
889         tcflag_t cflag,iflag;
890         int baud;
891         int status;
892         int port_number = port->number - port->serial->minor;
893         unsigned int mcr;
894
895         dbg("%s - port %d", __FUNCTION__, port->number);
896
897         if (!tty || !tty->termios) {
898                 dbg("%s - no tty or termios", __FUNCTION__);
899                 return;
900         }
901
902         cflag = tty->termios->c_cflag;
903         iflag = tty->termios->c_iflag;
904
905         if (old_termios && cflag == old_termios->c_cflag
906         && iflag == old_termios->c_iflag) {
907                 dbg("%s - nothing to change", __FUNCTION__);
908                 return;
909         }
910
911         dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
912
913         if (old_termios)
914                 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
915
916         if (tport == NULL)
917                 return;
918
919         config = kmalloc(sizeof(*config), GFP_KERNEL);
920         if (!config) {
921                 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
922                 return;
923         }
924
925         config->wFlags = 0;
926
927         /* these flags must be set */
928         config->wFlags |= TI_UART_ENABLE_MS_INTS;
929         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
930         config->bUartMode = (__u8)(tport->tp_uart_mode);
931
932         switch (cflag & CSIZE) {
933                 case CS5:
934                             config->bDataBits = TI_UART_5_DATA_BITS;
935                             break;
936                 case CS6:
937                             config->bDataBits = TI_UART_6_DATA_BITS;
938                             break;
939                 case CS7:
940                             config->bDataBits = TI_UART_7_DATA_BITS;
941                             break;
942                 default:
943                 case CS8:
944                             config->bDataBits = TI_UART_8_DATA_BITS;
945                             break;
946         }
947
948         if (cflag & PARENB) {
949                 if (cflag & PARODD) {
950                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
951                         config->bParity = TI_UART_ODD_PARITY;
952                 } else {
953                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
954                         config->bParity = TI_UART_EVEN_PARITY;
955                 }
956         } else {
957                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
958                 config->bParity = TI_UART_NO_PARITY;    
959         }
960
961         if (cflag & CSTOPB)
962                 config->bStopBits = TI_UART_2_STOP_BITS;
963         else
964                 config->bStopBits = TI_UART_1_STOP_BITS;
965
966         if (cflag & CRTSCTS) {
967                 /* RTS flow control must be off to drop RTS for baud rate B0 */
968                 if ((cflag & CBAUD) != B0)
969                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
970                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
971         } else {
972                 tty->hw_stopped = 0;
973                 ti_restart_read(tport, tty);
974         }
975
976         if (I_IXOFF(tty) || I_IXON(tty)) {
977                 config->cXon  = START_CHAR(tty);
978                 config->cXoff = STOP_CHAR(tty);
979
980                 if (I_IXOFF(tty))
981                         config->wFlags |= TI_UART_ENABLE_X_IN;
982                 else
983                         ti_restart_read(tport, tty);
984
985                 if (I_IXON(tty))
986                         config->wFlags |= TI_UART_ENABLE_X_OUT;
987         }
988
989         baud = tty_get_baud_rate(tty);
990         if (!baud) baud = 9600;
991         if (tport->tp_tdev->td_is_3410)
992                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
993         else
994                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
995
996         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
997         __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
998
999         cpu_to_be16s(&config->wBaudRate);
1000         cpu_to_be16s(&config->wFlags);
1001
1002         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1003                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1004                 sizeof(*config));
1005         if (status)
1006                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1007
1008         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1009         mcr = tport->tp_shadow_mcr;
1010         /* if baud rate is B0, clear RTS and DTR */
1011         if ((cflag & CBAUD) == B0)
1012                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1013         status = ti_set_mcr(tport, mcr);
1014         if (status)
1015                 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1016
1017         kfree(config);
1018 }
1019
1020
1021 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1022 {
1023         struct ti_port *tport = usb_get_serial_port_data(port);
1024         unsigned int result;
1025         unsigned int msr;
1026         unsigned int mcr;
1027
1028         dbg("%s - port %d", __FUNCTION__, port->number);
1029
1030         if (tport == NULL)
1031                 return -ENODEV;
1032
1033         msr = tport->tp_msr;
1034         mcr = tport->tp_shadow_mcr;
1035
1036         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1037                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1038                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1039                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1040                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1041                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1042                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1043
1044         dbg("%s - 0x%04X", __FUNCTION__, result);
1045
1046         return result;
1047 }
1048
1049
1050 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1051         unsigned int set, unsigned int clear)
1052 {
1053         struct ti_port *tport = usb_get_serial_port_data(port);
1054         unsigned int mcr;
1055
1056         dbg("%s - port %d", __FUNCTION__, port->number);
1057
1058         if (tport == NULL)
1059                 return -ENODEV;
1060
1061         mcr = tport->tp_shadow_mcr;
1062
1063         if (set & TIOCM_RTS)
1064                 mcr |= TI_MCR_RTS;
1065         if (set & TIOCM_DTR)
1066                 mcr |= TI_MCR_DTR;
1067         if (set & TIOCM_LOOP)
1068                 mcr |= TI_MCR_LOOP;
1069
1070         if (clear & TIOCM_RTS)
1071                 mcr &= ~TI_MCR_RTS;
1072         if (clear & TIOCM_DTR)
1073                 mcr &= ~TI_MCR_DTR;
1074         if (clear & TIOCM_LOOP)
1075                 mcr &= ~TI_MCR_LOOP;
1076
1077         return ti_set_mcr(tport, mcr);
1078 }
1079
1080
1081 static void ti_break(struct usb_serial_port *port, int break_state)
1082 {
1083         struct ti_port *tport = usb_get_serial_port_data(port);
1084         int status;
1085
1086         dbg("%s - state = %d", __FUNCTION__, break_state);
1087
1088         if (tport == NULL)
1089                 return;
1090
1091         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1092
1093         status = ti_write_byte(tport->tp_tdev,
1094                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1095                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1096
1097         if (status)
1098                 dbg("%s - error setting break, %d", __FUNCTION__, status);
1099 }
1100
1101
1102 static void ti_interrupt_callback(struct urb *urb)
1103 {
1104         struct ti_device *tdev = (struct ti_device *)urb->context;
1105         struct usb_serial_port *port;
1106         struct usb_serial *serial = tdev->td_serial;
1107         struct ti_port *tport;
1108         struct device *dev = &urb->dev->dev;
1109         unsigned char *data = urb->transfer_buffer;
1110         int length = urb->actual_length;
1111         int port_number;
1112         int function;
1113         int status;
1114         __u8 msr;
1115
1116         dbg("%s", __FUNCTION__);
1117
1118         switch (urb->status) {
1119         case 0:
1120                 break;
1121         case -ECONNRESET:
1122         case -ENOENT:
1123         case -ESHUTDOWN:
1124                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1125                 tdev->td_urb_error = 1;
1126                 return;
1127         default:
1128                 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1129                 tdev->td_urb_error = 1;
1130                 goto exit;
1131         }
1132
1133         if (length != 2) {
1134                 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1135                 goto exit;
1136         }
1137
1138         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1139                 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1140                 goto exit;
1141         }
1142
1143         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1144         function = TI_GET_FUNC_FROM_CODE(data[0]);
1145
1146         dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1147
1148         if (port_number >= serial->num_ports) {
1149                 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1150                 goto exit;
1151         }
1152
1153         port = serial->port[port_number];
1154
1155         tport = usb_get_serial_port_data(port);
1156         if (!tport)
1157                 goto exit;
1158
1159         switch (function) {
1160         case TI_CODE_DATA_ERROR:
1161                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1162                 break;
1163
1164         case TI_CODE_MODEM_STATUS:
1165                 msr = data[1];
1166                 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1167                 ti_handle_new_msr(tport, msr);
1168                 break;
1169
1170         default:
1171                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1172                 break;
1173         }
1174
1175 exit:
1176         status = usb_submit_urb(urb, GFP_ATOMIC);
1177         if (status)
1178                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status);
1179 }
1180
1181
1182 static void ti_bulk_in_callback(struct urb *urb)
1183 {
1184         struct ti_port *tport = (struct ti_port *)urb->context;
1185         struct usb_serial_port *port = tport->tp_port;
1186         struct device *dev = &urb->dev->dev;
1187         int status = 0;
1188
1189         dbg("%s", __FUNCTION__);
1190
1191         switch (urb->status) {
1192         case 0:
1193                 break;
1194         case -ECONNRESET:
1195         case -ENOENT:
1196         case -ESHUTDOWN:
1197                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->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", __FUNCTION__, urb->status );
1203                 tport->tp_tdev->td_urb_error = 1;
1204                 wake_up_interruptible(&tport->tp_write_wait);
1205         }
1206
1207         if (urb->status == -EPIPE)
1208                 goto exit;
1209
1210         if (urb->status) {
1211                 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1212                 return;
1213         }
1214
1215         if (port->tty && urb->actual_length) {
1216                 usb_serial_debug_data(debug, dev, __FUNCTION__,
1217                         urb->actual_length, urb->transfer_buffer);
1218
1219                 if (!tport->tp_is_open)
1220                         dbg("%s - port closed, dropping data", __FUNCTION__);
1221                 else
1222                         ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1223                                 urb->actual_length);
1224
1225                 spin_lock(&tport->tp_lock);
1226                 tport->tp_icount.rx += urb->actual_length;
1227                 spin_unlock(&tport->tp_lock);
1228         }
1229
1230 exit:
1231         /* continue to read unless stopping */
1232         spin_lock(&tport->tp_lock);
1233         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1234                 urb->dev = port->serial->dev;
1235                 status = usb_submit_urb(urb, GFP_ATOMIC);
1236         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1237                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1238         }
1239         spin_unlock(&tport->tp_lock);
1240         if (status)
1241                 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status);
1242 }
1243
1244
1245 static void ti_bulk_out_callback(struct urb *urb)
1246 {
1247         struct ti_port *tport = (struct ti_port *)urb->context;
1248         struct usb_serial_port *port = tport->tp_port;
1249         struct device *dev = &urb->dev->dev;
1250
1251         dbg("%s - port %d", __FUNCTION__, port->number);
1252
1253         tport->tp_write_urb_in_use = 0;
1254
1255         switch (urb->status) {
1256         case 0:
1257                 break;
1258         case -ECONNRESET:
1259         case -ENOENT:
1260         case -ESHUTDOWN:
1261                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1262                 tport->tp_tdev->td_urb_error = 1;
1263                 wake_up_interruptible(&tport->tp_write_wait);
1264                 return;
1265         default:
1266                 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1267                 tport->tp_tdev->td_urb_error = 1;
1268                 wake_up_interruptible(&tport->tp_write_wait);
1269         }
1270
1271         /* send any buffered data */
1272         ti_send(tport);
1273 }
1274
1275
1276 static void ti_recv(struct device *dev, struct tty_struct *tty,
1277         unsigned char *data, int length)
1278 {
1279         int cnt;
1280
1281         do {
1282                 cnt = tty_buffer_request_room(tty, length);
1283                 if (cnt < length) {
1284                         dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1285                         if(cnt == 0)
1286                                 break;
1287                 }
1288                 tty_insert_flip_string(tty, data, cnt);
1289                 tty_flip_buffer_push(tty);
1290                 data += cnt;
1291                 length -= cnt;
1292         } while (length > 0);
1293
1294 }
1295
1296
1297 static void ti_send(struct ti_port *tport)
1298 {
1299         int count, result;
1300         struct usb_serial_port *port = tport->tp_port;
1301         struct tty_struct *tty = port->tty;
1302         unsigned long flags;
1303
1304
1305         dbg("%s - port %d", __FUNCTION__, port->number);
1306
1307         spin_lock_irqsave(&tport->tp_lock, flags);
1308
1309         if (tport->tp_write_urb_in_use) {
1310                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1311                 return;
1312         }
1313
1314         count = ti_buf_get(tport->tp_write_buf,
1315                                 port->write_urb->transfer_buffer,
1316                                 port->bulk_out_size);
1317
1318         if (count == 0) {
1319                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1320                 return;
1321         }
1322
1323         tport->tp_write_urb_in_use = 1;
1324
1325         spin_unlock_irqrestore(&tport->tp_lock, flags);
1326
1327         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1328
1329         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1330                            usb_sndbulkpipe(port->serial->dev,
1331                                             port->bulk_out_endpointAddress),
1332                            port->write_urb->transfer_buffer, count,
1333                            ti_bulk_out_callback, tport);
1334
1335         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1336         if (result) {
1337                 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1338                 tport->tp_write_urb_in_use = 0; 
1339                 /* TODO: reschedule ti_send */
1340         } else {
1341                 spin_lock_irqsave(&tport->tp_lock, flags);
1342                 tport->tp_icount.tx += count;
1343                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1344         }
1345
1346         /* more room in the buffer for new writes, wakeup */
1347         if (tty)
1348                 tty_wakeup(tty);
1349         wake_up_interruptible(&tport->tp_write_wait);
1350 }
1351
1352
1353 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1354 {
1355         int status;
1356
1357         status = ti_write_byte(tport->tp_tdev,
1358                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1359                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1360
1361         if (!status)
1362                 tport->tp_shadow_mcr = mcr;
1363
1364         return status;
1365 }
1366
1367
1368 static int ti_get_lsr(struct ti_port *tport)
1369 {
1370         int size,status;
1371         struct ti_device *tdev = tport->tp_tdev;
1372         struct usb_serial_port *port = tport->tp_port;
1373         int port_number = port->number - port->serial->minor;
1374         struct ti_port_status *data;
1375
1376         dbg("%s - port %d", __FUNCTION__, port->number);
1377
1378         size = sizeof(struct ti_port_status);
1379         data = kmalloc(size, GFP_KERNEL);
1380         if (!data) {
1381                 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1382                 return -ENOMEM;
1383         }
1384
1385         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1386                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1387         if (status) {
1388                 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1389                 goto free_data;
1390         }
1391
1392         dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1393
1394         tport->tp_lsr = data->bLSR;
1395
1396 free_data:
1397         kfree(data);
1398         return status;
1399 }
1400
1401
1402 static int ti_get_serial_info(struct ti_port *tport,
1403         struct serial_struct __user *ret_arg)
1404 {
1405         struct usb_serial_port *port = tport->tp_port;
1406         struct serial_struct ret_serial;
1407
1408         if (!ret_arg)
1409                 return -EFAULT;
1410
1411         memset(&ret_serial, 0, sizeof(ret_serial));
1412
1413         ret_serial.type = PORT_16550A;
1414         ret_serial.line = port->serial->minor;
1415         ret_serial.port = port->number - port->serial->minor;
1416         ret_serial.flags = tport->tp_flags;
1417         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1418         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1419         ret_serial.closing_wait = tport->tp_closing_wait;
1420
1421         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1422                 return -EFAULT;
1423
1424         return 0;
1425 }
1426
1427
1428 static int ti_set_serial_info(struct ti_port *tport,
1429         struct serial_struct __user *new_arg)
1430 {
1431         struct usb_serial_port *port = tport->tp_port;
1432         struct serial_struct new_serial;
1433
1434         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1435                 return -EFAULT;
1436
1437         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1438         if (port->tty)
1439                 port->tty->low_latency =
1440                         (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1441         tport->tp_closing_wait = new_serial.closing_wait;
1442
1443         return 0;
1444 }
1445
1446
1447 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1448 {
1449         struct async_icount *icount;
1450         struct tty_struct *tty;
1451         unsigned long flags;
1452
1453         dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1454
1455         if (msr & TI_MSR_DELTA_MASK) {
1456                 spin_lock_irqsave(&tport->tp_lock, flags);
1457                 icount = &tport->tp_icount;
1458                 if (msr & TI_MSR_DELTA_CTS)
1459                         icount->cts++;
1460                 if (msr & TI_MSR_DELTA_DSR)
1461                         icount->dsr++;
1462                 if (msr & TI_MSR_DELTA_CD)
1463                         icount->dcd++;
1464                 if (msr & TI_MSR_DELTA_RI)
1465                         icount->rng++;
1466                 wake_up_interruptible(&tport->tp_msr_wait);
1467                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1468         }
1469
1470         tport->tp_msr = msr & TI_MSR_MASK;
1471
1472         /* handle CTS flow control */
1473         tty = tport->tp_port->tty;
1474         if (tty && C_CRTSCTS(tty)) {
1475                 if (msr & TI_MSR_CTS) {
1476                         tty->hw_stopped = 0;
1477                         tty_wakeup(tty);
1478                 } else {
1479                         tty->hw_stopped = 1;
1480                 }
1481         }
1482 }
1483
1484
1485 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1486 {
1487         struct ti_device *tdev = tport->tp_tdev;
1488         struct usb_serial_port *port = tport->tp_port;
1489         wait_queue_t wait;
1490         unsigned long flags;
1491
1492         dbg("%s - port %d", __FUNCTION__, port->number);
1493
1494         spin_lock_irqsave(&tport->tp_lock, flags);
1495
1496         /* wait for data to drain from the buffer */
1497         tdev->td_urb_error = 0;
1498         init_waitqueue_entry(&wait, current);
1499         add_wait_queue(&tport->tp_write_wait, &wait);
1500         for (;;) {
1501                 set_current_state(TASK_INTERRUPTIBLE);
1502                 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1503                 || timeout == 0 || signal_pending(current)
1504                 || tdev->td_urb_error
1505                 || !usb_get_intfdata(port->serial->interface))  /* disconnect */
1506                         break;
1507                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1508                 timeout = schedule_timeout(timeout);
1509                 spin_lock_irqsave(&tport->tp_lock, flags);
1510         }
1511         set_current_state(TASK_RUNNING);
1512         remove_wait_queue(&tport->tp_write_wait, &wait);
1513
1514         /* flush any remaining data in the buffer */
1515         if (flush)
1516                 ti_buf_clear(tport->tp_write_buf);
1517
1518         spin_unlock_irqrestore(&tport->tp_lock, flags);
1519
1520         /* wait for data to drain from the device */
1521         /* wait for empty tx register, plus 20 ms */
1522         timeout += jiffies;
1523         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1524         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1525         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1526         && usb_get_intfdata(port->serial->interface)) {  /* not disconnected */
1527                 if (ti_get_lsr(tport))
1528                         break;
1529                 msleep_interruptible(20);
1530         }
1531 }
1532
1533
1534 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1535 {
1536         unsigned long flags;
1537
1538         spin_lock_irqsave(&tport->tp_lock, flags);
1539
1540         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1541                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1542
1543         spin_unlock_irqrestore(&tport->tp_lock, flags);
1544 }
1545
1546
1547 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1548 {
1549         struct urb *urb;
1550         int status = 0;
1551         unsigned long flags;
1552
1553         spin_lock_irqsave(&tport->tp_lock, flags);
1554
1555         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1556                 urb = tport->tp_port->read_urb;
1557                 urb->complete = ti_bulk_in_callback;
1558                 urb->context = tport;
1559                 urb->dev = tport->tp_port->serial->dev;
1560                 status = usb_submit_urb(urb, GFP_KERNEL);
1561         }
1562         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1563
1564         spin_unlock_irqrestore(&tport->tp_lock, flags);
1565
1566         return status;
1567 }
1568
1569
1570 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1571         __u16 moduleid, __u16 value, __u8 *data, int size)
1572 {
1573         int status;
1574
1575         status = usb_control_msg(tdev->td_serial->dev,
1576                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1577                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1578                 value, moduleid, data, size, 1000);
1579
1580         if (status == size)
1581                 status = 0;
1582
1583         if (status > 0)
1584                 status = -ECOMM;
1585
1586         return status;
1587 }
1588
1589
1590 static int ti_command_in_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_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1597                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
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_write_byte(struct ti_device *tdev, unsigned long addr,
1611         __u8 mask, __u8 byte)
1612 {
1613         int status;
1614         unsigned int size;
1615         struct ti_write_data_bytes *data;
1616         struct device *dev = &tdev->td_serial->dev->dev;
1617
1618         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1619
1620         size = sizeof(struct ti_write_data_bytes) + 2;
1621         data = kmalloc(size, GFP_KERNEL);
1622         if (!data) {
1623                 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1624                 return -ENOMEM;
1625         }
1626
1627         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1628         data->bDataType = TI_RW_DATA_BYTE;
1629         data->bDataCounter = 1;
1630         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1631         data->wBaseAddrLo = cpu_to_be16(addr);
1632         data->bData[0] = mask;
1633         data->bData[1] = byte;
1634
1635         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1636                 (__u8 *)data, size);
1637
1638         if (status < 0)
1639                 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1640
1641         kfree(data);
1642
1643         return status;
1644 }
1645
1646
1647 static int ti_download_firmware(struct ti_device *tdev,
1648         unsigned char *firmware, unsigned int firmware_size)
1649 {
1650         int status = 0;
1651         int buffer_size;
1652         int pos;
1653         int len;
1654         int done;
1655         __u8 cs = 0;
1656         __u8 *buffer;
1657         struct usb_device *dev = tdev->td_serial->dev;
1658         struct ti_firmware_header *header;
1659         unsigned int pipe = usb_sndbulkpipe(dev,
1660                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1661
1662
1663         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1664         buffer = kmalloc(buffer_size, GFP_KERNEL);
1665         if (!buffer) {
1666                 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1667                 return -ENOMEM;
1668         }
1669
1670         memcpy(buffer, firmware, firmware_size);
1671         memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1672
1673         for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1674                 cs = (__u8)(cs + buffer[pos]);
1675
1676         header = (struct ti_firmware_header *)buffer;
1677         header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1678         header->bCheckSum = cs;
1679
1680         dbg("%s - downloading firmware", __FUNCTION__);
1681         for (pos = 0; pos < buffer_size; pos += done) {
1682                 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1683                 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1684                 if (status)
1685                         break;
1686         }
1687
1688         kfree(buffer);
1689
1690         if (status) {
1691                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1692                 return status;
1693         }
1694
1695         dbg("%s - download successful", __FUNCTION__);
1696
1697         return 0;
1698 }
1699
1700
1701 /* Circular Buffer Functions */
1702
1703 /*
1704  * ti_buf_alloc
1705  *
1706  * Allocate a circular buffer and all associated memory.
1707  */
1708
1709 static struct circ_buf *ti_buf_alloc(void)
1710 {
1711         struct circ_buf *cb;
1712
1713         cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1714         if (cb == NULL)
1715                 return NULL;
1716
1717         cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1718         if (cb->buf == NULL) {
1719                 kfree(cb);
1720                 return NULL;
1721         }
1722
1723         ti_buf_clear(cb);
1724
1725         return cb;
1726 }
1727
1728
1729 /*
1730  * ti_buf_free
1731  *
1732  * Free the buffer and all associated memory.
1733  */
1734
1735 static void ti_buf_free(struct circ_buf *cb)
1736 {
1737         kfree(cb->buf);
1738         kfree(cb);
1739 }
1740
1741
1742 /*
1743  * ti_buf_clear
1744  *
1745  * Clear out all data in the circular buffer.
1746  */
1747
1748 static void ti_buf_clear(struct circ_buf *cb)
1749 {
1750         cb->head = cb->tail = 0;
1751 }
1752
1753
1754 /*
1755  * ti_buf_data_avail
1756  *
1757  * Return the number of bytes of data available in the circular
1758  * buffer.
1759  */
1760
1761 static int ti_buf_data_avail(struct circ_buf *cb)
1762 {
1763         return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1764 }
1765
1766
1767 /*
1768  * ti_buf_space_avail
1769  *
1770  * Return the number of bytes of space available in the circular
1771  * buffer.
1772  */
1773
1774 static int ti_buf_space_avail(struct circ_buf *cb)
1775 {
1776         return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1777 }
1778
1779
1780 /*
1781  * ti_buf_put
1782  *
1783  * Copy data data from a user buffer and put it into the circular buffer.
1784  * Restrict to the amount of space available.
1785  *
1786  * Return the number of bytes copied.
1787  */
1788
1789 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1790 {
1791         int c, ret = 0;
1792
1793         while (1) {
1794                 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1795                 if (count < c)
1796                         c = count;
1797                 if (c <= 0)
1798                         break;
1799                 memcpy(cb->buf + cb->head, buf, c);
1800                 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1801                 buf += c;
1802                 count -= c;
1803                 ret += c;
1804         }
1805
1806         return ret;
1807 }
1808
1809
1810 /*
1811  * ti_buf_get
1812  *
1813  * Get data from the circular buffer and copy to the given buffer.
1814  * Restrict to the amount of data available.
1815  *
1816  * Return the number of bytes copied.
1817  */
1818
1819 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1820 {
1821         int c, ret = 0;
1822
1823         while (1) {
1824                 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1825                 if (count < c)
1826                         c = count;
1827                 if (c <= 0)
1828                         break;
1829                 memcpy(buf, cb->buf + cb->tail, c);
1830                 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1831                 buf += c;
1832                 count -= c;
1833                 ret += c;
1834         }
1835
1836         return ret;
1837 }