Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
[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 modify
9  *      it under the terms of the GNU General Public License as published by
10  *      the Free Software Foundation; either version 2 of the License.
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_set_termios   (struct usb_serial_port *port, struct termios *old_termios);
50 static void visor_write_bulk_callback   (struct urb *urb);
51 static void visor_read_bulk_callback    (struct urb *urb);
52 static void visor_read_int_callback     (struct urb *urb);
53 static int  clie_3_5_startup    (struct usb_serial *serial);
54 static int  treo_attach         (struct usb_serial *serial);
55 static int clie_5_attach (struct usb_serial *serial);
56 static int palm_os_3_probe (struct usb_serial *serial, const struct usb_device_id *id);
57 static int palm_os_4_probe (struct usb_serial *serial, const struct usb_device_id *id);
58
59 /* Parameters that may be passed into the module. */
60 static int debug;
61 static __u16 vendor;
62 static __u16 product;
63
64 static struct usb_device_id id_table [] = {
65         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID),
66                 .driver_info = (kernel_ulong_t)&palm_os_3_probe },
67         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID),
68                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
69         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID),
70                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
71         { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID),
72                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
73         { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID),
74                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
75         { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID),
76                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
77         { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID),
78                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
79         { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID),
80                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
81         { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID),
82                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
83         { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID),
84                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
85         { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID),
86                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
87         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID),
88                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
89         { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
90                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
91         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
92                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
93         { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE31_ID),
94                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
95         { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
96                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
97         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
98                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
99         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID),
100                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
101         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID),
102                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
103         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID),
104                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
105         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID),
106                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
107         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID),
108                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
109         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID), 
110                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
111         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID), 
112                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
113         { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
114                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
115         { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID), 
116                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
117         { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID),
118                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
119         { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID),
120                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
121         { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID),
122                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
123         { },                                    /* optional parameter entry */
124         { }                                     /* Terminating entry */
125 };
126
127 static struct usb_device_id clie_id_5_table [] = {
128         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID),
129                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
130         { },                                    /* optional parameter entry */
131         { }                                     /* Terminating entry */
132 };
133
134 static struct usb_device_id clie_id_3_5_table [] = {
135         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
136         { }                                     /* Terminating entry */
137 };
138
139 static struct usb_device_id id_table_combined [] = {
140         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) },
141         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) },
142         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) },
143         { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) },
144         { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) },
145         { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) },
146         { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) },
147         { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) },
148         { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) },
149         { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) },
150         { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) },
151         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
152         { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
153         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
154         { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE31_ID) },
155         { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
156         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
157         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
158         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) },
159         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) },
160         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) },
161         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) },
162         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) },
163         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) },
164         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) },
165         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) },
166         { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
167         { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) },
168         { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) },
169         { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) },
170         { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) },
171         { },                                    /* optional parameter entry */
172         { }                                     /* Terminating entry */
173 };
174
175 MODULE_DEVICE_TABLE (usb, id_table_combined);
176
177 static struct usb_driver visor_driver = {
178         .name =         "visor",
179         .probe =        usb_serial_probe,
180         .disconnect =   usb_serial_disconnect,
181         .id_table =     id_table_combined,
182         .no_dynamic_id =        1,
183 };
184
185 /* All of the device info needed for the Handspring Visor, and Palm 4.0 devices */
186 static struct usb_serial_driver handspring_device = {
187         .driver = {
188                 .owner =        THIS_MODULE,
189                 .name =         "visor",
190         },
191         .description =          "Handspring Visor / Palm OS",
192         .id_table =             id_table,
193         .num_interrupt_in =     NUM_DONT_CARE,
194         .num_bulk_in =          2,
195         .num_bulk_out =         2,
196         .num_ports =            2,
197         .open =                 visor_open,
198         .close =                visor_close,
199         .throttle =             visor_throttle,
200         .unthrottle =           visor_unthrottle,
201         .attach =               treo_attach,
202         .probe =                visor_probe,
203         .calc_num_ports =       visor_calc_num_ports,
204         .shutdown =             visor_shutdown,
205         .ioctl =                visor_ioctl,
206         .set_termios =          visor_set_termios,
207         .write =                visor_write,
208         .write_room =           visor_write_room,
209         .chars_in_buffer =      visor_chars_in_buffer,
210         .write_bulk_callback =  visor_write_bulk_callback,
211         .read_bulk_callback =   visor_read_bulk_callback,
212         .read_int_callback =    visor_read_int_callback,
213 };
214
215 /* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */
216 static struct usb_serial_driver clie_5_device = {
217         .driver = {
218                 .owner =        THIS_MODULE,
219                 .name =         "clie_5",
220         },
221         .description =          "Sony Clie 5.0",
222         .id_table =             clie_id_5_table,
223         .num_interrupt_in =     NUM_DONT_CARE,
224         .num_bulk_in =          2,
225         .num_bulk_out =         2,
226         .num_ports =            2,
227         .open =                 visor_open,
228         .close =                visor_close,
229         .throttle =             visor_throttle,
230         .unthrottle =           visor_unthrottle,
231         .attach =               clie_5_attach,
232         .probe =                visor_probe,
233         .calc_num_ports =       visor_calc_num_ports,
234         .shutdown =             visor_shutdown,
235         .ioctl =                visor_ioctl,
236         .set_termios =          visor_set_termios,
237         .write =                visor_write,
238         .write_room =           visor_write_room,
239         .chars_in_buffer =      visor_chars_in_buffer,
240         .write_bulk_callback =  visor_write_bulk_callback,
241         .read_bulk_callback =   visor_read_bulk_callback,
242         .read_int_callback =    visor_read_int_callback,
243 };
244
245 /* device info for the Sony Clie OS version 3.5 */
246 static struct usb_serial_driver clie_3_5_device = {
247         .driver = {
248                 .owner =        THIS_MODULE,
249                 .name =         "clie_3.5",
250         },
251         .description =          "Sony Clie 3.5",
252         .id_table =             clie_id_3_5_table,
253         .num_interrupt_in =     0,
254         .num_bulk_in =          1,
255         .num_bulk_out =         1,
256         .num_ports =            1,
257         .open =                 visor_open,
258         .close =                visor_close,
259         .throttle =             visor_throttle,
260         .unthrottle =           visor_unthrottle,
261         .attach =               clie_3_5_startup,
262         .ioctl =                visor_ioctl,
263         .set_termios =          visor_set_termios,
264         .write =                visor_write,
265         .write_room =           visor_write_room,
266         .chars_in_buffer =      visor_chars_in_buffer,
267         .write_bulk_callback =  visor_write_bulk_callback,
268         .read_bulk_callback =   visor_read_bulk_callback,
269 };
270
271 struct visor_private {
272         spinlock_t lock;
273         int bytes_in;
274         int bytes_out;
275         int outstanding_urbs;
276         int throttled;
277 };
278
279 /* number of outstanding urbs to prevent userspace DoS from happening */
280 #define URB_UPPER_LIMIT 42
281
282 static int stats;
283
284 /******************************************************************************
285  * Handspring Visor specific driver functions
286  ******************************************************************************/
287 static int visor_open (struct usb_serial_port *port, struct file *filp)
288 {
289         struct usb_serial *serial = port->serial;
290         struct visor_private *priv = usb_get_serial_port_data(port);
291         unsigned long flags;
292         int result = 0;
293
294         dbg("%s - port %d", __FUNCTION__, port->number);
295
296         if (!port->read_urb) {
297                 /* this is needed for some brain dead Sony devices */
298                 dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n");
299                 return -ENODEV;
300         }
301
302         spin_lock_irqsave(&priv->lock, flags);
303         priv->bytes_in = 0;
304         priv->bytes_out = 0;
305         priv->throttled = 0;
306         spin_unlock_irqrestore(&priv->lock, flags);
307
308         /*
309          * Force low_latency on so that our tty_push actually forces the data
310          * through, otherwise it is scheduled, and with high data rates (like
311          * with OHCI) data can get lost.
312          */
313         if (port->tty)
314                 port->tty->low_latency = 1;
315
316         /* Start reading from the device */
317         usb_fill_bulk_urb (port->read_urb, serial->dev,
318                            usb_rcvbulkpipe (serial->dev, 
319                                             port->bulk_in_endpointAddress),
320                            port->read_urb->transfer_buffer,
321                            port->read_urb->transfer_buffer_length,
322                            visor_read_bulk_callback, port);
323         result = usb_submit_urb(port->read_urb, GFP_KERNEL);
324         if (result) {
325                 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n",
326                         __FUNCTION__, result);
327                 goto exit;
328         }
329         
330         if (port->interrupt_in_urb) {
331                 dbg("%s - adding interrupt input for treo", __FUNCTION__);
332                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
333                 if (result)
334                         dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n",
335                                 __FUNCTION__, result);
336         }
337 exit:   
338         return result;
339 }
340
341
342 static void visor_close (struct usb_serial_port *port, struct file * filp)
343 {
344         struct visor_private *priv = usb_get_serial_port_data(port);
345         unsigned char *transfer_buffer;
346
347         dbg("%s - port %d", __FUNCTION__, port->number);
348                          
349         /* shutdown our urbs */
350         usb_kill_urb(port->read_urb);
351         usb_kill_urb(port->interrupt_in_urb);
352
353         /* Try to send shutdown message, if the device is gone, this will just fail. */
354         transfer_buffer =  kmalloc (0x12, GFP_KERNEL);
355         if (transfer_buffer) {
356                 usb_control_msg (port->serial->dev,
357                                  usb_rcvctrlpipe(port->serial->dev, 0),
358                                  VISOR_CLOSE_NOTIFICATION, 0xc2,
359                                  0x0000, 0x0000, 
360                                  transfer_buffer, 0x12, 300);
361                 kfree (transfer_buffer);
362         }
363
364         if (stats)
365                 dev_info(&port->dev, "Bytes In = %d  Bytes Out = %d\n",
366                          priv->bytes_in, priv->bytes_out);
367 }
368
369
370 static int visor_write (struct usb_serial_port *port, const unsigned char *buf, int count)
371 {
372         struct visor_private *priv = usb_get_serial_port_data(port);
373         struct usb_serial *serial = port->serial;
374         struct urb *urb;
375         unsigned char *buffer;
376         unsigned long flags;
377         int status;
378
379         dbg("%s - port %d", __FUNCTION__, port->number);
380
381         spin_lock_irqsave(&priv->lock, flags);
382         if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
383                 spin_unlock_irqrestore(&priv->lock, flags);
384                 dbg("%s - write limit hit\n", __FUNCTION__);
385                 return 0;
386         }
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                 return -ENOMEM;
393         }
394
395         urb = usb_alloc_urb(0, GFP_ATOMIC);
396         if (!urb) {
397                 dev_err(&port->dev, "no more free urbs\n");
398                 kfree (buffer);
399                 return -ENOMEM;
400         }
401
402         memcpy (buffer, buf, count);
403
404         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, buffer);
405
406         usb_fill_bulk_urb (urb, serial->dev,
407                            usb_sndbulkpipe (serial->dev,
408                                             port->bulk_out_endpointAddress),
409                            buffer, count, 
410                            visor_write_bulk_callback, port);
411
412         /* send it down the pipe */
413         status = usb_submit_urb(urb, GFP_ATOMIC);
414         if (status) {
415                 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed with status = %d\n",
416                         __FUNCTION__, status);
417                 count = status;
418                 kfree (buffer);
419         } else {
420                 spin_lock_irqsave(&priv->lock, flags);
421                 ++priv->outstanding_urbs;
422                 priv->bytes_out += count;
423                 spin_unlock_irqrestore(&priv->lock, flags);
424         }
425
426         /* we are done with this urb, so let the host driver
427          * really free it when it is finished with it */
428         usb_free_urb (urb);
429
430         return count;
431 }
432
433
434 static int visor_write_room (struct usb_serial_port *port)
435 {
436         struct visor_private *priv = usb_get_serial_port_data(port);
437         unsigned long flags;
438
439         dbg("%s - port %d", __FUNCTION__, port->number);
440
441         /*
442          * We really can take anything the user throws at us
443          * but let's pick a nice big number to tell the tty
444          * layer that we have lots of free space, unless we don't.
445          */
446
447         spin_lock_irqsave(&priv->lock, flags);
448         if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
449                 spin_unlock_irqrestore(&priv->lock, flags);
450                 dbg("%s - write limit hit\n", __FUNCTION__);
451                 return 0;
452         }
453         spin_unlock_irqrestore(&priv->lock, flags);
454
455         return 2048;
456 }
457
458
459 static int visor_chars_in_buffer (struct usb_serial_port *port)
460 {
461         dbg("%s - port %d", __FUNCTION__, port->number);
462
463         /* 
464          * We can't really account for how much data we
465          * have sent out, but hasn't made it through to the
466          * device, so just tell the tty layer that everything
467          * is flushed.
468          */
469         return 0;
470 }
471
472
473 static void visor_write_bulk_callback (struct urb *urb)
474 {
475         struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
476         struct visor_private *priv = usb_get_serial_port_data(port);
477         unsigned long flags;
478
479         /* free up the transfer buffer, as usb_free_urb() does not do this */
480         kfree (urb->transfer_buffer);
481
482         dbg("%s - port %d", __FUNCTION__, port->number);
483         
484         if (urb->status)
485                 dbg("%s - nonzero write bulk status received: %d",
486                     __FUNCTION__, urb->status);
487
488         spin_lock_irqsave(&priv->lock, flags);
489         --priv->outstanding_urbs;
490         spin_unlock_irqrestore(&priv->lock, flags);
491
492         usb_serial_port_softint(port);
493 }
494
495
496 static void visor_read_bulk_callback (struct urb *urb)
497 {
498         struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
499         struct visor_private *priv = usb_get_serial_port_data(port);
500         unsigned char *data = urb->transfer_buffer;
501         struct tty_struct *tty;
502         unsigned long flags;
503         int throttled;
504         int result;
505
506         dbg("%s - port %d", __FUNCTION__, port->number);
507
508         if (urb->status) {
509                 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
510                 return;
511         }
512
513         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
514
515         tty = port->tty;
516         if (tty && urb->actual_length) {
517                 tty_buffer_request_room(tty, urb->actual_length);
518                 tty_insert_flip_string(tty, data, urb->actual_length);
519                 tty_flip_buffer_push(tty);
520         }
521         spin_lock_irqsave(&priv->lock, flags);
522         priv->bytes_in += urb->actual_length;
523         throttled = priv->throttled;
524         spin_unlock_irqrestore(&priv->lock, flags);
525
526         /* Continue trying to always read if we should */
527         if (!throttled) {
528                 usb_fill_bulk_urb (port->read_urb, port->serial->dev,
529                                    usb_rcvbulkpipe(port->serial->dev,
530                                                    port->bulk_in_endpointAddress),
531                                    port->read_urb->transfer_buffer,
532                                    port->read_urb->transfer_buffer_length,
533                                    visor_read_bulk_callback, port);
534                 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
535                 if (result)
536                         dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
537         }
538         return;
539 }
540
541 static void visor_read_int_callback (struct urb *urb)
542 {
543         struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
544         int result;
545
546         switch (urb->status) {
547         case 0:
548                 /* success */
549                 break;
550         case -ECONNRESET:
551         case -ENOENT:
552         case -ESHUTDOWN:
553                 /* this urb is terminated, clean up */
554                 dbg("%s - urb shutting down with status: %d",
555                     __FUNCTION__, urb->status);
556                 return;
557         default:
558                 dbg("%s - nonzero urb status received: %d",
559                     __FUNCTION__, urb->status);
560                 goto exit;
561         }
562
563         /*
564          * This information is still unknown what it can be used for.
565          * If anyone has an idea, please let the author know...
566          *
567          * Rumor has it this endpoint is used to notify when data
568          * is ready to be read from the bulk ones.
569          */
570         usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
571                               urb->actual_length, urb->transfer_buffer);
572
573 exit:
574         result = usb_submit_urb (urb, GFP_ATOMIC);
575         if (result)
576                 dev_err(&urb->dev->dev, "%s - Error %d submitting interrupt urb\n",
577                         __FUNCTION__, result);
578 }
579
580 static void visor_throttle (struct usb_serial_port *port)
581 {
582         struct visor_private *priv = usb_get_serial_port_data(port);
583         unsigned long flags;
584
585         dbg("%s - port %d", __FUNCTION__, port->number);
586         spin_lock_irqsave(&priv->lock, flags);
587         priv->throttled = 1;
588         spin_unlock_irqrestore(&priv->lock, flags);
589 }
590
591
592 static void visor_unthrottle (struct usb_serial_port *port)
593 {
594         struct visor_private *priv = usb_get_serial_port_data(port);
595         unsigned long flags;
596         int result;
597
598         dbg("%s - port %d", __FUNCTION__, port->number);
599         spin_lock_irqsave(&priv->lock, flags);
600         priv->throttled = 0;
601         spin_unlock_irqrestore(&priv->lock, flags);
602
603         port->read_urb->dev = port->serial->dev;
604         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
605         if (result)
606                 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
607 }
608
609 static int palm_os_3_probe (struct usb_serial *serial, const struct usb_device_id *id)
610 {
611         struct device *dev = &serial->dev->dev;
612         struct visor_connection_info *connection_info;
613         unsigned char *transfer_buffer;
614         char *string;
615         int retval = 0;
616         int i;
617         int num_ports = 0;
618
619         dbg("%s", __FUNCTION__);
620
621         transfer_buffer = kmalloc (sizeof (*connection_info), GFP_KERNEL);
622         if (!transfer_buffer) {
623                 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __FUNCTION__,
624                         sizeof(*connection_info));
625                 return -ENOMEM;
626         }
627
628         /* send a get connection info request */
629         retval = usb_control_msg (serial->dev,
630                                   usb_rcvctrlpipe(serial->dev, 0),
631                                   VISOR_GET_CONNECTION_INFORMATION,
632                                   0xc2, 0x0000, 0x0000, transfer_buffer,
633                                   sizeof(*connection_info), 300);
634         if (retval < 0) {
635                 dev_err(dev, "%s - error %d getting connection information\n",
636                         __FUNCTION__, retval);
637                 goto exit;
638         }
639
640         if (retval == sizeof(*connection_info)) {
641                 connection_info = (struct visor_connection_info *)transfer_buffer;
642
643                 num_ports = le16_to_cpu(connection_info->num_ports);
644                 for (i = 0; i < num_ports; ++i) {
645                         switch (connection_info->connections[i].port_function_id) {
646                                 case VISOR_FUNCTION_GENERIC:
647                                         string = "Generic";
648                                         break;
649                                 case VISOR_FUNCTION_DEBUGGER:
650                                         string = "Debugger";
651                                         break;
652                                 case VISOR_FUNCTION_HOTSYNC:
653                                         string = "HotSync";
654                                         break;
655                                 case VISOR_FUNCTION_CONSOLE:
656                                         string = "Console";
657                                         break;
658                                 case VISOR_FUNCTION_REMOTE_FILE_SYS:
659                                         string = "Remote File System";
660                                         break;
661                                 default:
662                                         string = "unknown";
663                                         break;
664                         }
665                         dev_info(dev, "%s: port %d, is for %s use\n",
666                                 serial->type->description,
667                                 connection_info->connections[i].port, string);
668                 }
669         }
670         /*
671         * Handle devices that report invalid stuff here.
672         */
673         if (num_ports == 0 || num_ports > 2) {
674                 dev_warn (dev, "%s: No valid connect info available\n",
675                         serial->type->description);
676                 num_ports = 2;
677         }
678   
679         dev_info(dev, "%s: Number of ports: %d\n", serial->type->description,
680                 num_ports);
681
682         /*
683          * save off our num_ports info so that we can use it in the
684          * calc_num_ports callback
685          */
686         usb_set_serial_data(serial, (void *)(long)num_ports);
687
688         /* ask for the number of bytes available, but ignore the response as it is broken */
689         retval = usb_control_msg (serial->dev,
690                                   usb_rcvctrlpipe(serial->dev, 0),
691                                   VISOR_REQUEST_BYTES_AVAILABLE,
692                                   0xc2, 0x0000, 0x0005, transfer_buffer,
693                                   0x02, 300);
694         if (retval < 0)
695                 dev_err(dev, "%s - error %d getting bytes available request\n",
696                         __FUNCTION__, retval);
697         retval = 0;
698
699 exit:
700         kfree (transfer_buffer);
701
702         return retval;
703 }
704
705 static int palm_os_4_probe (struct usb_serial *serial, const struct usb_device_id *id)
706 {
707         struct device *dev = &serial->dev->dev;
708         struct palm_ext_connection_info *connection_info;
709         unsigned char *transfer_buffer;
710         int retval;
711
712         dbg("%s", __FUNCTION__);
713
714         transfer_buffer =  kmalloc (sizeof (*connection_info), GFP_KERNEL);
715         if (!transfer_buffer) {
716                 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __FUNCTION__,
717                         sizeof(*connection_info));
718                 return -ENOMEM;
719         }
720
721         retval = usb_control_msg (serial->dev,
722                                   usb_rcvctrlpipe(serial->dev, 0), 
723                                   PALM_GET_EXT_CONNECTION_INFORMATION,
724                                   0xc2, 0x0000, 0x0000, transfer_buffer,
725                                   sizeof (*connection_info), 300);
726         if (retval < 0)
727                 dev_err(dev, "%s - error %d getting connection info\n",
728                         __FUNCTION__, retval);
729         else
730                 usb_serial_debug_data(debug, &serial->dev->dev, __FUNCTION__,
731                                       retval, transfer_buffer);
732
733         kfree (transfer_buffer);
734         return 0;
735 }
736
737
738 static int visor_probe (struct usb_serial *serial, const struct usb_device_id *id)
739 {
740         int retval = 0;
741         int (*startup) (struct usb_serial *serial, const struct usb_device_id *id);
742
743         dbg("%s", __FUNCTION__);
744
745         if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
746                 err("active config #%d != 1 ??",
747                         serial->dev->actconfig->desc.bConfigurationValue);
748                 return -ENODEV;
749         }
750
751         if (id->driver_info) {
752                 startup = (void *)id->driver_info;
753                 retval = startup(serial, id);
754         }
755
756         return retval;
757 }
758
759 static int visor_calc_num_ports (struct usb_serial *serial)
760 {
761         int num_ports = (int)(long)(usb_get_serial_data(serial));
762
763         if (num_ports)
764                 usb_set_serial_data(serial, NULL);
765
766         return num_ports;
767 }
768
769 static int generic_startup(struct usb_serial *serial)
770 {
771         struct usb_serial_port **ports = serial->port;
772         struct visor_private *priv;
773         int i;
774
775         for (i = 0; i < serial->num_ports; ++i) {
776                 priv = kzalloc (sizeof(*priv), GFP_KERNEL);
777                 if (!priv) {
778                         while (i-- != 0) {
779                                 priv = usb_get_serial_port_data(ports[i]);
780                                 usb_set_serial_port_data(ports[i], NULL);
781                                 kfree(priv);
782                         }
783                         return -ENOMEM;
784                 }
785                 spin_lock_init(&priv->lock);
786                 usb_set_serial_port_data(ports[i], priv);
787         }
788         return 0;
789 }
790
791 static int clie_3_5_startup (struct usb_serial *serial)
792 {
793         struct device *dev = &serial->dev->dev;
794         int result;
795         u8 data;
796
797         dbg("%s", __FUNCTION__);
798
799         /*
800          * Note that PEG-300 series devices expect the following two calls.
801          */
802
803         /* get the config number */
804         result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0),
805                                   USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
806                                   0, 0, &data, 1, 3000);
807         if (result < 0) {
808                 dev_err(dev, "%s: get config number failed: %d\n", __FUNCTION__, result);
809                 return result;
810         }
811         if (result != 1) {
812                 dev_err(dev, "%s: get config number bad return length: %d\n", __FUNCTION__, result);
813                 return -EIO;
814         }
815
816         /* get the interface number */
817         result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0),
818                                   USB_REQ_GET_INTERFACE, 
819                                   USB_DIR_IN | USB_RECIP_INTERFACE,
820                                   0, 0, &data, 1, 3000);
821         if (result < 0) {
822                 dev_err(dev, "%s: get interface number failed: %d\n", __FUNCTION__, result);
823                 return result;
824         }
825         if (result != 1) {
826                 dev_err(dev, "%s: get interface number bad return length: %d\n", __FUNCTION__, result);
827                 return -EIO;
828         }
829
830         return generic_startup(serial);
831 }
832  
833 static int treo_attach (struct usb_serial *serial)
834 {
835         struct usb_serial_port *swap_port;
836
837         /* Only do this endpoint hack for the Handspring devices with
838          * interrupt in endpoints, which for now are the Treo devices. */
839         if (!((le16_to_cpu(serial->dev->descriptor.idVendor) == HANDSPRING_VENDOR_ID) ||
840               (le16_to_cpu(serial->dev->descriptor.idVendor) == KYOCERA_VENDOR_ID)) ||
841             (serial->num_interrupt_in == 0))
842                 goto generic_startup;
843
844         dbg("%s", __FUNCTION__);
845
846         /*
847         * It appears that Treos and Kyoceras want to use the 
848         * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint, 
849         * so let's swap the 1st and 2nd bulk in and interrupt endpoints.  
850         * Note that swapping the bulk out endpoints would break lots of 
851         * apps that want to communicate on the second port.
852         */
853 #define COPY_PORT(dest, src)                                            \
854         dest->read_urb = src->read_urb;                                 \
855         dest->bulk_in_endpointAddress = src->bulk_in_endpointAddress;   \
856         dest->bulk_in_buffer = src->bulk_in_buffer;                     \
857         dest->interrupt_in_urb = src->interrupt_in_urb;                 \
858         dest->interrupt_in_endpointAddress = src->interrupt_in_endpointAddress; \
859         dest->interrupt_in_buffer = src->interrupt_in_buffer;
860
861         swap_port = kmalloc(sizeof(*swap_port), GFP_KERNEL);
862         if (!swap_port)
863                 return -ENOMEM;
864         COPY_PORT(swap_port, serial->port[0]);
865         COPY_PORT(serial->port[0], serial->port[1]);
866         COPY_PORT(serial->port[1], swap_port);
867         kfree(swap_port);
868
869 generic_startup:
870         return generic_startup(serial);
871 }
872
873 static int clie_5_attach (struct usb_serial *serial)
874 {
875         dbg("%s", __FUNCTION__);
876
877         /* TH55 registers 2 ports. 
878            Communication in from the UX50/TH55 uses bulk_in_endpointAddress from port 0 
879            Communication out to the UX50/TH55 uses bulk_out_endpointAddress from port 1 
880            
881            Lets do a quick and dirty mapping
882          */
883         
884         /* some sanity check */
885         if (serial->num_ports < 2)
886                 return -1;
887                 
888         /* port 0 now uses the modified endpoint Address */
889         serial->port[0]->bulk_out_endpointAddress = serial->port[1]->bulk_out_endpointAddress;
890
891         return generic_startup(serial);
892 }
893
894 static void visor_shutdown (struct usb_serial *serial)
895 {
896         struct visor_private *priv;
897         int i;
898
899         dbg("%s", __FUNCTION__);
900
901         for (i = 0; i < serial->num_ports; i++) {
902                 priv = usb_get_serial_port_data(serial->port[i]);
903                 if (priv) {
904                         usb_set_serial_port_data(serial->port[i], NULL);
905                         kfree(priv);
906                 }
907         }
908 }
909
910 static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
911 {
912         dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
913
914         return -ENOIOCTLCMD;
915 }
916
917
918 /* This function is all nice and good, but we don't change anything based on it :) */
919 static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios)
920 {
921         unsigned int cflag;
922
923         dbg("%s - port %d", __FUNCTION__, port->number);
924
925         if ((!port->tty) || (!port->tty->termios)) {
926                 dbg("%s - no tty structures", __FUNCTION__);
927                 return;
928         }
929
930         cflag = port->tty->termios->c_cflag;
931         /* check that they really want us to change something */
932         if (old_termios) {
933                 if ((cflag == old_termios->c_cflag) &&
934                     (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
935                         dbg("%s - nothing to change...", __FUNCTION__);
936                         return;
937                 }
938         }
939
940         /* get the byte size */
941         switch (cflag & CSIZE) {
942                 case CS5:       dbg("%s - data bits = 5", __FUNCTION__);   break;
943                 case CS6:       dbg("%s - data bits = 6", __FUNCTION__);   break;
944                 case CS7:       dbg("%s - data bits = 7", __FUNCTION__);   break;
945                 default:
946                 case CS8:       dbg("%s - data bits = 8", __FUNCTION__);   break;
947         }
948         
949         /* determine the parity */
950         if (cflag & PARENB)
951                 if (cflag & PARODD)
952                         dbg("%s - parity = odd", __FUNCTION__);
953                 else
954                         dbg("%s - parity = even", __FUNCTION__);
955         else
956                 dbg("%s - parity = none", __FUNCTION__);
957
958         /* figure out the stop bits requested */
959         if (cflag & CSTOPB)
960                 dbg("%s - stop bits = 2", __FUNCTION__);
961         else
962                 dbg("%s - stop bits = 1", __FUNCTION__);
963
964         
965         /* figure out the flow control settings */
966         if (cflag & CRTSCTS)
967                 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
968         else
969                 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
970         
971         /* determine software flow control */
972         if (I_IXOFF(port->tty))
973                 dbg("%s - XON/XOFF is enabled, XON = %2x, XOFF = %2x",
974                     __FUNCTION__, START_CHAR(port->tty), STOP_CHAR(port->tty));
975         else
976                 dbg("%s - XON/XOFF is disabled", __FUNCTION__);
977
978         /* get the baud rate wanted */
979         dbg("%s - baud rate = %d", __FUNCTION__, tty_get_baud_rate(port->tty));
980
981         return;
982 }
983
984
985 static int __init visor_init (void)
986 {
987         int i, retval;
988         /* Only if parameters were passed to us */
989         if ((vendor>0) && (product>0)) {
990                 struct usb_device_id usb_dev_temp[]=
991                         {{USB_DEVICE(vendor, product),
992                         .driver_info = (kernel_ulong_t)&palm_os_4_probe }};
993
994                 /* Find the last entry in id_table */
995                 for (i=0; ; i++) {
996                         if (id_table[i].idVendor==0) {
997                                 id_table[i] = usb_dev_temp[0];
998                                 break;
999                         }
1000                 }
1001                 /* Find the last entry in id_table_combined */
1002                 for (i=0; ; i++) {
1003                         if (id_table_combined[i].idVendor==0) {
1004                                 id_table_combined[i] = usb_dev_temp[0];
1005                                 break;
1006                         }
1007                 }
1008                 info("Untested USB device specified at time of module insertion");
1009                 info("Warning: This is not guaranteed to work");
1010                 info("Using a newer kernel is preferred to this method");
1011                 info("Adding Palm OS protocol 4.x support for unknown device: 0x%x/0x%x",
1012                         vendor, product);
1013         }
1014         retval = usb_serial_register(&handspring_device);
1015         if (retval)
1016                 goto failed_handspring_register;
1017         retval = usb_serial_register(&clie_3_5_device);
1018         if (retval)
1019                 goto failed_clie_3_5_register;
1020         retval = usb_serial_register(&clie_5_device);
1021         if (retval)
1022                 goto failed_clie_5_register;
1023         retval = usb_register(&visor_driver);
1024         if (retval) 
1025                 goto failed_usb_register;
1026         info(DRIVER_DESC);
1027
1028         return 0;
1029 failed_usb_register:
1030         usb_serial_deregister(&clie_5_device);
1031 failed_clie_5_register:
1032         usb_serial_deregister(&clie_3_5_device);
1033 failed_clie_3_5_register:
1034         usb_serial_deregister(&handspring_device);
1035 failed_handspring_register:
1036         return retval;
1037 }
1038
1039
1040 static void __exit visor_exit (void)
1041 {
1042         usb_deregister (&visor_driver);
1043         usb_serial_deregister (&handspring_device);
1044         usb_serial_deregister (&clie_3_5_device);
1045         usb_serial_deregister (&clie_5_device);
1046 }
1047
1048
1049 module_init(visor_init);
1050 module_exit(visor_exit);
1051
1052 MODULE_AUTHOR( DRIVER_AUTHOR );
1053 MODULE_DESCRIPTION( DRIVER_DESC );
1054 MODULE_LICENSE("GPL");
1055
1056 module_param(debug, bool, S_IRUGO | S_IWUSR);
1057 MODULE_PARM_DESC(debug, "Debug enabled or not");
1058 module_param(stats, bool, S_IRUGO | S_IWUSR);
1059 MODULE_PARM_DESC(stats, "Enables statistics or not");
1060
1061 module_param(vendor, ushort, 0);
1062 MODULE_PARM_DESC(vendor, "User specified vendor ID");
1063 module_param(product, ushort, 0);
1064 MODULE_PARM_DESC(product, "User specified product ID");
1065