Merge branch 'ext3-latency-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6] / drivers / usb / serial / visor.c
1 /*
2  * USB HandSpring Visor, Palm m50x, and Sony Clie driver
3  * (supports all of the Palm OS USB devices)
4  *
5  *      Copyright (C) 1999 - 2004
6  *          Greg Kroah-Hartman (greg@kroah.com)
7  *
8  *      This program is free software; you can redistribute it and/or
9  *      modify it under the terms of the GNU General Public License version
10  *      2 as published by the Free Software Foundation.
11  *
12  * See Documentation/usb/usb-serial.txt for more information on using this
13  * driver
14  *
15  */
16
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/init.h>
20 #include <linux/slab.h>
21 #include <linux/tty.h>
22 #include <linux/tty_driver.h>
23 #include <linux/tty_flip.h>
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/spinlock.h>
27 #include <linux/uaccess.h>
28 #include <linux/usb.h>
29 #include <linux/usb/serial.h>
30 #include "visor.h"
31
32 /*
33  * Version Information
34  */
35 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
36 #define DRIVER_DESC "USB HandSpring Visor / Palm OS driver"
37
38 /* function prototypes for a handspring visor */
39 static int  visor_open(struct tty_struct *tty, struct usb_serial_port *port,
40                                         struct file *filp);
41 static void visor_close(struct tty_struct *tty, struct usb_serial_port *port,
42                                         struct file *filp);
43 static int  visor_write(struct tty_struct *tty, struct usb_serial_port *port,
44                                         const unsigned char *buf, int count);
45 static int  visor_write_room(struct tty_struct *tty);
46 static void visor_throttle(struct tty_struct *tty);
47 static void visor_unthrottle(struct tty_struct *tty);
48 static int  visor_probe(struct usb_serial *serial,
49                                         const struct usb_device_id *id);
50 static int  visor_calc_num_ports(struct usb_serial *serial);
51 static void visor_shutdown(struct usb_serial *serial);
52 static void visor_write_bulk_callback(struct urb *urb);
53 static void visor_read_bulk_callback(struct urb *urb);
54 static void visor_read_int_callback(struct urb *urb);
55 static int  clie_3_5_startup(struct usb_serial *serial);
56 static int  treo_attach(struct usb_serial *serial);
57 static int clie_5_attach(struct usb_serial *serial);
58 static int palm_os_3_probe(struct usb_serial *serial,
59                                         const struct usb_device_id *id);
60 static int palm_os_4_probe(struct usb_serial *serial,
61                                         const struct usb_device_id *id);
62
63 /* Parameters that may be passed into the module. */
64 static int debug;
65 static __u16 vendor;
66 static __u16 product;
67
68 static struct usb_device_id id_table [] = {
69         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID),
70                 .driver_info = (kernel_ulong_t)&palm_os_3_probe },
71         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID),
72                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
73         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID),
74                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
75         { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID),
76                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
77         { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID),
78                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
79         { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID),
80                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
81         { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID),
82                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
83         { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID),
84                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
85         { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID),
86                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
87         { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID),
88                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
89         { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID),
90                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
91         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID),
92                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
93         { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
94                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
95         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
96                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
97         { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
98                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
99         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
100                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
101         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID),
102                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
103         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID),
104                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
105         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID),
106                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
107         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID),
108                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
109         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID),
110                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
111         { USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID),
112                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
113         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID),
114                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
115         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID),
116                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
117         { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
118                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
119         { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID),
120                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
121         { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID),
122                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
123         { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID),
124                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
125         { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID),
126                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
127         { },                                    /* optional parameter entry */
128         { }                                     /* Terminating entry */
129 };
130
131 static struct usb_device_id clie_id_5_table [] = {
132         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID),
133                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
134         { },                                    /* optional parameter entry */
135         { }                                     /* Terminating entry */
136 };
137
138 static struct usb_device_id clie_id_3_5_table [] = {
139         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
140         { }                                     /* Terminating entry */
141 };
142
143 static struct usb_device_id id_table_combined [] = {
144         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) },
145         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) },
146         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) },
147         { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) },
148         { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) },
149         { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) },
150         { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) },
151         { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) },
152         { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) },
153         { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) },
154         { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) },
155         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
156         { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
157         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
158         { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
159         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
160         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
161         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) },
162         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) },
163         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) },
164         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) },
165         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) },
166         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) },
167         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) },
168         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) },
169         { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
170         { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) },
171         { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) },
172         { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) },
173         { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) },
174         { },                                    /* optional parameter entry */
175         { }                                     /* Terminating entry */
176 };
177
178 MODULE_DEVICE_TABLE(usb, id_table_combined);
179
180 static struct usb_driver visor_driver = {
181         .name =         "visor",
182         .probe =        usb_serial_probe,
183         .disconnect =   usb_serial_disconnect,
184         .id_table =     id_table_combined,
185         .no_dynamic_id =        1,
186 };
187
188 /* All of the device info needed for the Handspring Visor,
189    and Palm 4.0 devices */
190 static struct usb_serial_driver handspring_device = {
191         .driver = {
192                 .owner =        THIS_MODULE,
193                 .name =         "visor",
194         },
195         .description =          "Handspring Visor / Palm OS",
196         .usb_driver =           &visor_driver,
197         .id_table =             id_table,
198         .num_ports =            2,
199         .open =                 visor_open,
200         .close =                visor_close,
201         .throttle =             visor_throttle,
202         .unthrottle =           visor_unthrottle,
203         .attach =               treo_attach,
204         .probe =                visor_probe,
205         .calc_num_ports =       visor_calc_num_ports,
206         .shutdown =             visor_shutdown,
207         .write =                visor_write,
208         .write_room =           visor_write_room,
209         .write_bulk_callback =  visor_write_bulk_callback,
210         .read_bulk_callback =   visor_read_bulk_callback,
211         .read_int_callback =    visor_read_int_callback,
212 };
213
214 /* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */
215 static struct usb_serial_driver clie_5_device = {
216         .driver = {
217                 .owner =        THIS_MODULE,
218                 .name =         "clie_5",
219         },
220         .description =          "Sony Clie 5.0",
221         .usb_driver =           &visor_driver,
222         .id_table =             clie_id_5_table,
223         .num_ports =            2,
224         .open =                 visor_open,
225         .close =                visor_close,
226         .throttle =             visor_throttle,
227         .unthrottle =           visor_unthrottle,
228         .attach =               clie_5_attach,
229         .probe =                visor_probe,
230         .calc_num_ports =       visor_calc_num_ports,
231         .shutdown =             visor_shutdown,
232         .write =                visor_write,
233         .write_room =           visor_write_room,
234         .write_bulk_callback =  visor_write_bulk_callback,
235         .read_bulk_callback =   visor_read_bulk_callback,
236         .read_int_callback =    visor_read_int_callback,
237 };
238
239 /* device info for the Sony Clie OS version 3.5 */
240 static struct usb_serial_driver clie_3_5_device = {
241         .driver = {
242                 .owner =        THIS_MODULE,
243                 .name =         "clie_3.5",
244         },
245         .description =          "Sony Clie 3.5",
246         .usb_driver =           &visor_driver,
247         .id_table =             clie_id_3_5_table,
248         .num_ports =            1,
249         .open =                 visor_open,
250         .close =                visor_close,
251         .throttle =             visor_throttle,
252         .unthrottle =           visor_unthrottle,
253         .attach =               clie_3_5_startup,
254         .write =                visor_write,
255         .write_room =           visor_write_room,
256         .write_bulk_callback =  visor_write_bulk_callback,
257         .read_bulk_callback =   visor_read_bulk_callback,
258 };
259
260 struct visor_private {
261         spinlock_t lock;
262         int bytes_in;
263         int bytes_out;
264         int outstanding_urbs;
265         unsigned char throttled;
266         unsigned char actually_throttled;
267 };
268
269 /* number of outstanding urbs to prevent userspace DoS from happening */
270 #define URB_UPPER_LIMIT 42
271
272 static int stats;
273
274 /******************************************************************************
275  * Handspring Visor specific driver functions
276  ******************************************************************************/
277 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port,
278                                                         struct file *filp)
279 {
280         struct usb_serial *serial = port->serial;
281         struct visor_private *priv = usb_get_serial_port_data(port);
282         unsigned long flags;
283         int result = 0;
284
285         dbg("%s - port %d", __func__, port->number);
286
287         if (!port->read_urb) {
288                 /* this is needed for some brain dead Sony devices */
289                 dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n");
290                 return -ENODEV;
291         }
292
293         spin_lock_irqsave(&priv->lock, flags);
294         priv->bytes_in = 0;
295         priv->bytes_out = 0;
296         priv->throttled = 0;
297         spin_unlock_irqrestore(&priv->lock, flags);
298
299         /*
300          * Force low_latency on so that our tty_push actually forces the data
301          * through, otherwise it is scheduled, and with high data rates (like
302          * with OHCI) data can get lost.
303          */
304         if (tty)
305                 tty->low_latency = 1;
306
307         /* Start reading from the device */
308         usb_fill_bulk_urb(port->read_urb, serial->dev,
309                            usb_rcvbulkpipe(serial->dev,
310                                             port->bulk_in_endpointAddress),
311                            port->read_urb->transfer_buffer,
312                            port->read_urb->transfer_buffer_length,
313                            visor_read_bulk_callback, port);
314         result = usb_submit_urb(port->read_urb, GFP_KERNEL);
315         if (result) {
316                 dev_err(&port->dev,
317                         "%s - failed submitting read urb, error %d\n",
318                                                         __func__, result);
319                 goto exit;
320         }
321
322         if (port->interrupt_in_urb) {
323                 dbg("%s - adding interrupt input for treo", __func__);
324                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
325                 if (result)
326                         dev_err(&port->dev,
327                             "%s - failed submitting interrupt urb, error %d\n",
328                                                         __func__, result);
329         }
330 exit:
331         return result;
332 }
333
334
335 static void visor_close(struct tty_struct *tty,
336                         struct usb_serial_port *port, struct file *filp)
337 {
338         struct visor_private *priv = usb_get_serial_port_data(port);
339         unsigned char *transfer_buffer;
340
341         dbg("%s - port %d", __func__, port->number);
342
343         /* shutdown our urbs */
344         usb_kill_urb(port->read_urb);
345         usb_kill_urb(port->interrupt_in_urb);
346
347         mutex_lock(&port->serial->disc_mutex);
348         if (!port->serial->disconnected) {
349                 /* Try to send shutdown message, unless the device is gone */
350                 transfer_buffer =  kmalloc(0x12, GFP_KERNEL);
351                 if (transfer_buffer) {
352                         usb_control_msg(port->serial->dev,
353                                          usb_rcvctrlpipe(port->serial->dev, 0),
354                                          VISOR_CLOSE_NOTIFICATION, 0xc2,
355                                          0x0000, 0x0000,
356                                          transfer_buffer, 0x12, 300);
357                         kfree(transfer_buffer);
358                 }
359         }
360         mutex_unlock(&port->serial->disc_mutex);
361
362         if (stats)
363                 dev_info(&port->dev, "Bytes In = %d  Bytes Out = %d\n",
364                          priv->bytes_in, priv->bytes_out);
365 }
366
367
368 static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
369                                         const unsigned char *buf, int count)
370 {
371         struct visor_private *priv = usb_get_serial_port_data(port);
372         struct usb_serial *serial = port->serial;
373         struct urb *urb;
374         unsigned char *buffer;
375         unsigned long flags;
376         int status;
377
378         dbg("%s - port %d", __func__, port->number);
379
380         spin_lock_irqsave(&priv->lock, flags);
381         if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
382                 spin_unlock_irqrestore(&priv->lock, flags);
383                 dbg("%s - write limit hit\n", __func__);
384                 return 0;
385         }
386         priv->outstanding_urbs++;
387         spin_unlock_irqrestore(&priv->lock, flags);
388
389         buffer = kmalloc(count, GFP_ATOMIC);
390         if (!buffer) {
391                 dev_err(&port->dev, "out of memory\n");
392                 count = -ENOMEM;
393                 goto error_no_buffer;
394         }
395
396         urb = usb_alloc_urb(0, GFP_ATOMIC);
397         if (!urb) {
398                 dev_err(&port->dev, "no more free urbs\n");
399                 count = -ENOMEM;
400                 goto error_no_urb;
401         }
402
403         memcpy(buffer, buf, count);
404
405         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
406
407         usb_fill_bulk_urb(urb, serial->dev,
408                            usb_sndbulkpipe(serial->dev,
409                                             port->bulk_out_endpointAddress),
410                            buffer, count,
411                            visor_write_bulk_callback, port);
412
413         /* send it down the pipe */
414         status = usb_submit_urb(urb, GFP_ATOMIC);
415         if (status) {
416                 dev_err(&port->dev,
417                    "%s - usb_submit_urb(write bulk) failed with status = %d\n",
418                                                         __func__, status);
419                 count = status;
420                 goto error;
421         } else {
422                 spin_lock_irqsave(&priv->lock, flags);
423                 priv->bytes_out += count;
424                 spin_unlock_irqrestore(&priv->lock, flags);
425         }
426
427         /* we are done with this urb, so let the host driver
428          * really free it when it is finished with it */
429         usb_free_urb(urb);
430
431         return count;
432 error:
433         usb_free_urb(urb);
434 error_no_urb:
435         kfree(buffer);
436 error_no_buffer:
437         spin_lock_irqsave(&priv->lock, flags);
438         --priv->outstanding_urbs;
439         spin_unlock_irqrestore(&priv->lock, flags);
440         return count;
441 }
442
443
444 static int visor_write_room(struct tty_struct *tty)
445 {
446         struct usb_serial_port *port = tty->driver_data;
447         struct visor_private *priv = usb_get_serial_port_data(port);
448         unsigned long flags;
449
450         dbg("%s - port %d", __func__, port->number);
451
452         /*
453          * We really can take anything the user throws at us
454          * but let's pick a nice big number to tell the tty
455          * layer that we have lots of free space, unless we don't.
456          */
457
458         spin_lock_irqsave(&priv->lock, flags);
459         if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
460                 spin_unlock_irqrestore(&priv->lock, flags);
461                 dbg("%s - write limit hit\n", __func__);
462                 return 0;
463         }
464         spin_unlock_irqrestore(&priv->lock, flags);
465
466         return 2048;
467 }
468
469
470 static void visor_write_bulk_callback(struct urb *urb)
471 {
472         struct usb_serial_port *port = urb->context;
473         struct visor_private *priv = usb_get_serial_port_data(port);
474         int status = urb->status;
475         unsigned long flags;
476
477         /* free up the transfer buffer, as usb_free_urb() does not do this */
478         kfree(urb->transfer_buffer);
479
480         dbg("%s - port %d", __func__, port->number);
481
482         if (status)
483                 dbg("%s - nonzero write bulk status received: %d",
484                     __func__, status);
485
486         spin_lock_irqsave(&priv->lock, flags);
487         --priv->outstanding_urbs;
488         spin_unlock_irqrestore(&priv->lock, flags);
489
490         usb_serial_port_softint(port);
491 }
492
493
494 static void visor_read_bulk_callback(struct urb *urb)
495 {
496         struct usb_serial_port *port = urb->context;
497         struct visor_private *priv = usb_get_serial_port_data(port);
498         unsigned char *data = urb->transfer_buffer;
499         int status = urb->status;
500         struct tty_struct *tty;
501         int result;
502         int available_room = 0;
503
504         dbg("%s - port %d", __func__, port->number);
505
506         if (status) {
507                 dbg("%s - nonzero read bulk status received: %d",
508                     __func__, status);
509                 return;
510         }
511
512         usb_serial_debug_data(debug, &port->dev, __func__,
513                                                 urb->actual_length, data);
514
515         if (urb->actual_length) {
516                 tty = tty_port_tty_get(&port->port);
517                 if (tty) {
518                         available_room = tty_buffer_request_room(tty,
519                                                         urb->actual_length);
520                         if (available_room) {
521                                 tty_insert_flip_string(tty, data,
522                                                         available_room);
523                                 tty_flip_buffer_push(tty);
524                         }
525                         tty_kref_put(tty);
526                 }
527                 spin_lock(&priv->lock);
528                 priv->bytes_in += available_room;
529
530         } else {
531                 spin_lock(&priv->lock);
532         }
533
534         /* Continue trying to always read if we should */
535         if (!priv->throttled) {
536                 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
537                                    usb_rcvbulkpipe(port->serial->dev,
538                                            port->bulk_in_endpointAddress),
539                                    port->read_urb->transfer_buffer,
540                                    port->read_urb->transfer_buffer_length,
541                                    visor_read_bulk_callback, port);
542                 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
543                 if (result)
544                         dev_err(&port->dev,
545                             "%s - failed resubmitting read urb, error %d\n",
546                                                         __func__, result);
547         } else
548                 priv->actually_throttled = 1;
549         spin_unlock(&priv->lock);
550 }
551
552 static void visor_read_int_callback(struct urb *urb)
553 {
554         struct usb_serial_port *port = urb->context;
555         int status = urb->status;
556         int result;
557
558         switch (status) {
559         case 0:
560                 /* success */
561                 break;
562         case -ECONNRESET:
563         case -ENOENT:
564         case -ESHUTDOWN:
565                 /* this urb is terminated, clean up */
566                 dbg("%s - urb shutting down with status: %d",
567                     __func__, status);
568                 return;
569         default:
570                 dbg("%s - nonzero urb status received: %d",
571                     __func__, status);
572                 goto exit;
573         }
574
575         /*
576          * This information is still unknown what it can be used for.
577          * If anyone has an idea, please let the author know...
578          *
579          * Rumor has it this endpoint is used to notify when data
580          * is ready to be read from the bulk ones.
581          */
582         usb_serial_debug_data(debug, &port->dev, __func__,
583                               urb->actual_length, urb->transfer_buffer);
584
585 exit:
586         result = usb_submit_urb(urb, GFP_ATOMIC);
587         if (result)
588                 dev_err(&urb->dev->dev,
589                                 "%s - Error %d submitting interrupt urb\n",
590                                                         __func__, result);
591 }
592
593 static void visor_throttle(struct tty_struct *tty)
594 {
595         struct usb_serial_port *port = tty->driver_data;
596         struct visor_private *priv = usb_get_serial_port_data(port);
597         unsigned long flags;
598
599         dbg("%s - port %d", __func__, port->number);
600         spin_lock_irqsave(&priv->lock, flags);
601         priv->throttled = 1;
602         spin_unlock_irqrestore(&priv->lock, flags);
603 }
604
605
606 static void visor_unthrottle(struct tty_struct *tty)
607 {
608         struct usb_serial_port *port = tty->driver_data;
609         struct visor_private *priv = usb_get_serial_port_data(port);
610         unsigned long flags;
611         int result;
612
613         dbg("%s - port %d", __func__, port->number);
614         spin_lock_irqsave(&priv->lock, flags);
615         priv->throttled = 0;
616         priv->actually_throttled = 0;
617         spin_unlock_irqrestore(&priv->lock, flags);
618
619         port->read_urb->dev = port->serial->dev;
620         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
621         if (result)
622                 dev_err(&port->dev,
623                         "%s - failed submitting read urb, error %d\n",
624                                                         __func__, result);
625 }
626
627 static int palm_os_3_probe(struct usb_serial *serial,
628                                                 const struct usb_device_id *id)
629 {
630         struct device *dev = &serial->dev->dev;
631         struct visor_connection_info *connection_info;
632         unsigned char *transfer_buffer;
633         char *string;
634         int retval = 0;
635         int i;
636         int num_ports = 0;
637
638         dbg("%s", __func__);
639
640         transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL);
641         if (!transfer_buffer) {
642                 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
643                         sizeof(*connection_info));
644                 return -ENOMEM;
645         }
646
647         /* send a get connection info request */
648         retval = usb_control_msg(serial->dev,
649                                   usb_rcvctrlpipe(serial->dev, 0),
650                                   VISOR_GET_CONNECTION_INFORMATION,
651                                   0xc2, 0x0000, 0x0000, transfer_buffer,
652                                   sizeof(*connection_info), 300);
653         if (retval < 0) {
654                 dev_err(dev, "%s - error %d getting connection information\n",
655                         __func__, retval);
656                 goto exit;
657         }
658
659         if (retval == sizeof(*connection_info)) {
660                         connection_info = (struct visor_connection_info *)
661                                                         transfer_buffer;
662
663                 num_ports = le16_to_cpu(connection_info->num_ports);
664                 for (i = 0; i < num_ports; ++i) {
665                         switch (
666                            connection_info->connections[i].port_function_id) {
667                         case VISOR_FUNCTION_GENERIC:
668                                 string = "Generic";
669                                 break;
670                         case VISOR_FUNCTION_DEBUGGER:
671                                 string = "Debugger";
672                                 break;
673                         case VISOR_FUNCTION_HOTSYNC:
674                                 string = "HotSync";
675                                 break;
676                         case VISOR_FUNCTION_CONSOLE:
677                                 string = "Console";
678                                 break;
679                         case VISOR_FUNCTION_REMOTE_FILE_SYS:
680                                 string = "Remote File System";
681                                 break;
682                         default:
683                                 string = "unknown";
684                                 break;
685                         }
686                         dev_info(dev, "%s: port %d, is for %s use\n",
687                                 serial->type->description,
688                                 connection_info->connections[i].port, string);
689                 }
690         }
691         /*
692         * Handle devices that report invalid stuff here.
693         */
694         if (num_ports == 0 || num_ports > 2) {
695                 dev_warn(dev, "%s: No valid connect info available\n",
696                         serial->type->description);
697                 num_ports = 2;
698         }
699
700         dev_info(dev, "%s: Number of ports: %d\n", serial->type->description,
701                 num_ports);
702
703         /*
704          * save off our num_ports info so that we can use it in the
705          * calc_num_ports callback
706          */
707         usb_set_serial_data(serial, (void *)(long)num_ports);
708
709         /* ask for the number of bytes available, but ignore the
710            response as it is broken */
711         retval = usb_control_msg(serial->dev,
712                                   usb_rcvctrlpipe(serial->dev, 0),
713                                   VISOR_REQUEST_BYTES_AVAILABLE,
714                                   0xc2, 0x0000, 0x0005, transfer_buffer,
715                                   0x02, 300);
716         if (retval < 0)
717                 dev_err(dev, "%s - error %d getting bytes available request\n",
718                         __func__, retval);
719         retval = 0;
720
721 exit:
722         kfree(transfer_buffer);
723
724         return retval;
725 }
726
727 static int palm_os_4_probe(struct usb_serial *serial,
728                                                 const struct usb_device_id *id)
729 {
730         struct device *dev = &serial->dev->dev;
731         struct palm_ext_connection_info *connection_info;
732         unsigned char *transfer_buffer;
733         int retval;
734
735         dbg("%s", __func__);
736
737         transfer_buffer =  kmalloc(sizeof(*connection_info), GFP_KERNEL);
738         if (!transfer_buffer) {
739                 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
740                         sizeof(*connection_info));
741                 return -ENOMEM;
742         }
743
744         retval = usb_control_msg(serial->dev,
745                                   usb_rcvctrlpipe(serial->dev, 0),
746                                   PALM_GET_EXT_CONNECTION_INFORMATION,
747                                   0xc2, 0x0000, 0x0000, transfer_buffer,
748                                   sizeof(*connection_info), 300);
749         if (retval < 0)
750                 dev_err(dev, "%s - error %d getting connection info\n",
751                         __func__, retval);
752         else
753                 usb_serial_debug_data(debug, &serial->dev->dev, __func__,
754                                       retval, transfer_buffer);
755
756         kfree(transfer_buffer);
757         return 0;
758 }
759
760
761 static int visor_probe(struct usb_serial *serial,
762                                         const struct usb_device_id *id)
763 {
764         int retval = 0;
765         int (*startup)(struct usb_serial *serial,
766                                         const struct usb_device_id *id);
767
768         dbg("%s", __func__);
769
770         if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
771                 dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
772                         serial->dev->actconfig->desc.bConfigurationValue);
773                 return -ENODEV;
774         }
775
776         if (id->driver_info) {
777                 startup = (void *)id->driver_info;
778                 retval = startup(serial, id);
779         }
780
781         return retval;
782 }
783
784 static int visor_calc_num_ports(struct usb_serial *serial)
785 {
786         int num_ports = (int)(long)(usb_get_serial_data(serial));
787
788         if (num_ports)
789                 usb_set_serial_data(serial, NULL);
790
791         return num_ports;
792 }
793
794 static int generic_startup(struct usb_serial *serial)
795 {
796         struct usb_serial_port **ports = serial->port;
797         struct visor_private *priv;
798         int i;
799
800         for (i = 0; i < serial->num_ports; ++i) {
801                 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
802                 if (!priv) {
803                         while (i-- != 0) {
804                                 priv = usb_get_serial_port_data(ports[i]);
805                                 usb_set_serial_port_data(ports[i], NULL);
806                                 kfree(priv);
807                         }
808                         return -ENOMEM;
809                 }
810                 spin_lock_init(&priv->lock);
811                 usb_set_serial_port_data(ports[i], priv);
812         }
813         return 0;
814 }
815
816 static int clie_3_5_startup(struct usb_serial *serial)
817 {
818         struct device *dev = &serial->dev->dev;
819         int result;
820         u8 data;
821
822         dbg("%s", __func__);
823
824         /*
825          * Note that PEG-300 series devices expect the following two calls.
826          */
827
828         /* get the config number */
829         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
830                                   USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
831                                   0, 0, &data, 1, 3000);
832         if (result < 0) {
833                 dev_err(dev, "%s: get config number failed: %d\n",
834                                                         __func__, result);
835                 return result;
836         }
837         if (result != 1) {
838                 dev_err(dev, "%s: get config number bad return length: %d\n",
839                                                         __func__, result);
840                 return -EIO;
841         }
842
843         /* get the interface number */
844         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
845                                   USB_REQ_GET_INTERFACE,
846                                   USB_DIR_IN | USB_RECIP_INTERFACE,
847                                   0, 0, &data, 1, 3000);
848         if (result < 0) {
849                 dev_err(dev, "%s: get interface number failed: %d\n",
850                                                         __func__, result);
851                 return result;
852         }
853         if (result != 1) {
854                 dev_err(dev,
855                         "%s: get interface number bad return length: %d\n",
856                                                         __func__, result);
857                 return -EIO;
858         }
859
860         return generic_startup(serial);
861 }
862
863 static int treo_attach(struct usb_serial *serial)
864 {
865         struct usb_serial_port *swap_port;
866
867         /* Only do this endpoint hack for the Handspring devices with
868          * interrupt in endpoints, which for now are the Treo devices. */
869         if (!((le16_to_cpu(serial->dev->descriptor.idVendor)
870                                                 == HANDSPRING_VENDOR_ID) ||
871                 (le16_to_cpu(serial->dev->descriptor.idVendor)
872                                                 == KYOCERA_VENDOR_ID)) ||
873                 (serial->num_interrupt_in == 0))
874                 goto generic_startup;
875
876         dbg("%s", __func__);
877
878         /*
879         * It appears that Treos and Kyoceras want to use the
880         * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
881         * so let's swap the 1st and 2nd bulk in and interrupt endpoints.
882         * Note that swapping the bulk out endpoints would break lots of
883         * apps that want to communicate on the second port.
884         */
885 #define COPY_PORT(dest, src)                                            \
886         do { \
887                 dest->read_urb = src->read_urb;                         \
888                 dest->bulk_in_endpointAddress = src->bulk_in_endpointAddress;\
889                 dest->bulk_in_buffer = src->bulk_in_buffer;             \
890                 dest->interrupt_in_urb = src->interrupt_in_urb;         \
891                 dest->interrupt_in_endpointAddress = \
892                                         src->interrupt_in_endpointAddress;\
893                 dest->interrupt_in_buffer = src->interrupt_in_buffer;   \
894         } while (0);
895
896         swap_port = kmalloc(sizeof(*swap_port), GFP_KERNEL);
897         if (!swap_port)
898                 return -ENOMEM;
899         COPY_PORT(swap_port, serial->port[0]);
900         COPY_PORT(serial->port[0], serial->port[1]);
901         COPY_PORT(serial->port[1], swap_port);
902         kfree(swap_port);
903
904 generic_startup:
905         return generic_startup(serial);
906 }
907
908 static int clie_5_attach(struct usb_serial *serial)
909 {
910         dbg("%s", __func__);
911
912         /* TH55 registers 2 ports.
913            Communication in from the UX50/TH55 uses bulk_in_endpointAddress
914            from port 0. Communication out to the UX50/TH55 uses
915            bulk_out_endpointAddress from port 1
916
917            Lets do a quick and dirty mapping
918          */
919
920         /* some sanity check */
921         if (serial->num_ports < 2)
922                 return -1;
923
924         /* port 0 now uses the modified endpoint Address */
925         serial->port[0]->bulk_out_endpointAddress =
926                                 serial->port[1]->bulk_out_endpointAddress;
927
928         return generic_startup(serial);
929 }
930
931 static void visor_shutdown(struct usb_serial *serial)
932 {
933         struct visor_private *priv;
934         int i;
935
936         dbg("%s", __func__);
937
938         for (i = 0; i < serial->num_ports; i++) {
939                 priv = usb_get_serial_port_data(serial->port[i]);
940                 if (priv) {
941                         usb_set_serial_port_data(serial->port[i], NULL);
942                         kfree(priv);
943                 }
944         }
945 }
946
947 static int __init visor_init(void)
948 {
949         int i, retval;
950         /* Only if parameters were passed to us */
951         if (vendor > 0 && product > 0) {
952                 struct usb_device_id usb_dev_temp[] = {
953                         {
954                                 USB_DEVICE(vendor, product),
955                                 .driver_info =
956                                         (kernel_ulong_t) &palm_os_4_probe
957                         }
958                 };
959
960                 /* Find the last entry in id_table */
961                 for (i = 0;; i++) {
962                         if (id_table[i].idVendor == 0) {
963                                 id_table[i] = usb_dev_temp[0];
964                                 break;
965                         }
966                 }
967                 /* Find the last entry in id_table_combined */
968                 for (i = 0;; i++) {
969                         if (id_table_combined[i].idVendor == 0) {
970                                 id_table_combined[i] = usb_dev_temp[0];
971                                 break;
972                         }
973                 }
974                 printk(KERN_INFO KBUILD_MODNAME
975                        ": Untested USB device specified at time of module insertion\n");
976                 printk(KERN_INFO KBUILD_MODNAME
977                        ": Warning: This is not guaranteed to work\n");
978                 printk(KERN_INFO KBUILD_MODNAME
979                        ": Using a newer kernel is preferred to this method\n");
980                 printk(KERN_INFO KBUILD_MODNAME
981                        ": Adding Palm OS protocol 4.x support for unknown device: 0x%x/0x%x\n",
982                         vendor, product);
983         }
984         retval = usb_serial_register(&handspring_device);
985         if (retval)
986                 goto failed_handspring_register;
987         retval = usb_serial_register(&clie_3_5_device);
988         if (retval)
989                 goto failed_clie_3_5_register;
990         retval = usb_serial_register(&clie_5_device);
991         if (retval)
992                 goto failed_clie_5_register;
993         retval = usb_register(&visor_driver);
994         if (retval)
995                 goto failed_usb_register;
996         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
997
998         return 0;
999 failed_usb_register:
1000         usb_serial_deregister(&clie_5_device);
1001 failed_clie_5_register:
1002         usb_serial_deregister(&clie_3_5_device);
1003 failed_clie_3_5_register:
1004         usb_serial_deregister(&handspring_device);
1005 failed_handspring_register:
1006         return retval;
1007 }
1008
1009
1010 static void __exit visor_exit (void)
1011 {
1012         usb_deregister(&visor_driver);
1013         usb_serial_deregister(&handspring_device);
1014         usb_serial_deregister(&clie_3_5_device);
1015         usb_serial_deregister(&clie_5_device);
1016 }
1017
1018
1019 module_init(visor_init);
1020 module_exit(visor_exit);
1021
1022 MODULE_AUTHOR(DRIVER_AUTHOR);
1023 MODULE_DESCRIPTION(DRIVER_DESC);
1024 MODULE_LICENSE("GPL");
1025
1026 module_param(debug, bool, S_IRUGO | S_IWUSR);
1027 MODULE_PARM_DESC(debug, "Debug enabled or not");
1028 module_param(stats, bool, S_IRUGO | S_IWUSR);
1029 MODULE_PARM_DESC(stats, "Enables statistics or not");
1030
1031 module_param(vendor, ushort, 0);
1032 MODULE_PARM_DESC(vendor, "User specified vendor ID");
1033 module_param(product, ushort, 0);
1034 MODULE_PARM_DESC(product, "User specified product ID");
1035