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