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1da177e4 LT |
1 | /* |
2 | * KLSI KL5KUSB105 chip RS232 converter driver | |
3 | * | |
4 | * Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * All information about the device was acquired using SniffUSB ans snoopUSB | |
12 | * on Windows98. | |
13 | * It was written out of frustration with the PalmConnect USB Serial adapter | |
14 | * sold by Palm Inc. | |
15 | * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided | |
16 | * information that was not already available. | |
17 | * | |
18 | * It seems that KLSI bought some silicon-design information from ScanLogic, | |
19 | * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI. | |
20 | * KLSI has firmware available for their devices; it is probable that the | |
21 | * firmware differs from that used by KLSI in their products. If you have an | |
22 | * original KLSI device and can provide some information on it, I would be | |
23 | * most interested in adding support for it here. If you have any information | |
24 | * on the protocol used (or find errors in my reverse-engineered stuff), please | |
25 | * let me know. | |
26 | * | |
27 | * The code was only tested with a PalmConnect USB adapter; if you | |
28 | * are adventurous, try it with any KLSI-based device and let me know how it | |
29 | * breaks so that I can fix it! | |
30 | */ | |
31 | ||
32 | /* TODO: | |
33 | * check modem line signals | |
34 | * implement handshaking or decide that we do not support it | |
35 | */ | |
36 | ||
37 | /* History: | |
38 | * 0.3a - implemented pools of write URBs | |
39 | * 0.3 - alpha version for public testing | |
40 | * 0.2 - TIOCMGET works, so autopilot(1) can be used! | |
41 | * 0.1 - can be used to to pilot-xfer -p /dev/ttyUSB0 -l | |
42 | * | |
43 | * The driver skeleton is mainly based on mct_u232.c and various other | |
44 | * pieces of code shamelessly copied from the drivers/usb/serial/ directory. | |
45 | */ | |
46 | ||
47 | ||
48 | #include <linux/config.h> | |
49 | #include <linux/kernel.h> | |
50 | #include <linux/errno.h> | |
51 | #include <linux/init.h> | |
52 | #include <linux/slab.h> | |
53 | #include <linux/tty.h> | |
54 | #include <linux/tty_driver.h> | |
55 | #include <linux/tty_flip.h> | |
56 | #include <linux/module.h> | |
57 | #include <asm/uaccess.h> | |
58 | #include <linux/usb.h> | |
59 | #include "usb-serial.h" | |
60 | #include "kl5kusb105.h" | |
61 | ||
62 | static int debug; | |
63 | ||
64 | /* | |
65 | * Version Information | |
66 | */ | |
67 | #define DRIVER_VERSION "v0.3a" | |
68 | #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>" | |
69 | #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver" | |
70 | ||
71 | ||
72 | /* | |
73 | * Function prototypes | |
74 | */ | |
75 | static int klsi_105_startup (struct usb_serial *serial); | |
76 | static void klsi_105_shutdown (struct usb_serial *serial); | |
77 | static int klsi_105_open (struct usb_serial_port *port, | |
78 | struct file *filp); | |
79 | static void klsi_105_close (struct usb_serial_port *port, | |
80 | struct file *filp); | |
81 | static int klsi_105_write (struct usb_serial_port *port, | |
82 | const unsigned char *buf, | |
83 | int count); | |
84 | static void klsi_105_write_bulk_callback (struct urb *urb, struct pt_regs *regs); | |
85 | static int klsi_105_chars_in_buffer (struct usb_serial_port *port); | |
86 | static int klsi_105_write_room (struct usb_serial_port *port); | |
87 | ||
88 | static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs); | |
89 | static void klsi_105_set_termios (struct usb_serial_port *port, | |
90 | struct termios * old); | |
91 | static int klsi_105_ioctl (struct usb_serial_port *port, | |
92 | struct file * file, | |
93 | unsigned int cmd, | |
94 | unsigned long arg); | |
95 | static void klsi_105_throttle (struct usb_serial_port *port); | |
96 | static void klsi_105_unthrottle (struct usb_serial_port *port); | |
97 | /* | |
98 | static void klsi_105_break_ctl (struct usb_serial_port *port, | |
99 | int break_state ); | |
100 | */ | |
101 | static int klsi_105_tiocmget (struct usb_serial_port *port, | |
102 | struct file *file); | |
103 | static int klsi_105_tiocmset (struct usb_serial_port *port, | |
104 | struct file *file, unsigned int set, | |
105 | unsigned int clear); | |
106 | ||
107 | /* | |
108 | * All of the device info needed for the KLSI converters. | |
109 | */ | |
110 | static struct usb_device_id id_table [] = { | |
111 | { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) }, | |
112 | { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) }, | |
113 | { } /* Terminating entry */ | |
114 | }; | |
115 | ||
116 | MODULE_DEVICE_TABLE (usb, id_table); | |
117 | ||
118 | static struct usb_driver kl5kusb105d_driver = { | |
119 | .owner = THIS_MODULE, | |
120 | .name = "kl5kusb105d", | |
121 | .probe = usb_serial_probe, | |
122 | .disconnect = usb_serial_disconnect, | |
123 | .id_table = id_table, | |
124 | }; | |
125 | ||
126 | static struct usb_serial_device_type kl5kusb105d_device = { | |
127 | .owner = THIS_MODULE, | |
128 | .name = "KL5KUSB105D / PalmConnect", | |
129 | .short_name = "kl5kusb105d", | |
130 | .id_table = id_table, | |
131 | .num_interrupt_in = 1, | |
132 | .num_bulk_in = 1, | |
133 | .num_bulk_out = 1, | |
134 | .num_ports = 1, | |
135 | .open = klsi_105_open, | |
136 | .close = klsi_105_close, | |
137 | .write = klsi_105_write, | |
138 | .write_bulk_callback = klsi_105_write_bulk_callback, | |
139 | .chars_in_buffer = klsi_105_chars_in_buffer, | |
140 | .write_room = klsi_105_write_room, | |
141 | .read_bulk_callback =klsi_105_read_bulk_callback, | |
142 | .ioctl = klsi_105_ioctl, | |
143 | .set_termios = klsi_105_set_termios, | |
144 | /*.break_ctl = klsi_105_break_ctl,*/ | |
145 | .tiocmget = klsi_105_tiocmget, | |
146 | .tiocmset = klsi_105_tiocmset, | |
147 | .attach = klsi_105_startup, | |
148 | .shutdown = klsi_105_shutdown, | |
149 | .throttle = klsi_105_throttle, | |
150 | .unthrottle = klsi_105_unthrottle, | |
151 | }; | |
152 | ||
153 | struct klsi_105_port_settings { | |
154 | __u8 pktlen; /* always 5, it seems */ | |
155 | __u8 baudrate; | |
156 | __u8 databits; | |
157 | __u8 unknown1; | |
158 | __u8 unknown2; | |
159 | } __attribute__ ((packed)); | |
160 | ||
161 | /* we implement a pool of NUM_URBS urbs per usb_serial */ | |
162 | #define NUM_URBS 1 | |
163 | #define URB_TRANSFER_BUFFER_SIZE 64 | |
164 | struct klsi_105_private { | |
165 | struct klsi_105_port_settings cfg; | |
166 | struct termios termios; | |
167 | unsigned long line_state; /* modem line settings */ | |
168 | /* write pool */ | |
169 | struct urb * write_urb_pool[NUM_URBS]; | |
170 | spinlock_t lock; | |
171 | unsigned long bytes_in; | |
172 | unsigned long bytes_out; | |
173 | }; | |
174 | ||
175 | ||
176 | /* | |
177 | * Handle vendor specific USB requests | |
178 | */ | |
179 | ||
180 | ||
181 | #define KLSI_TIMEOUT 5000 /* default urb timeout */ | |
182 | ||
183 | static int klsi_105_chg_port_settings(struct usb_serial_port *port, | |
184 | struct klsi_105_port_settings *settings) | |
185 | { | |
186 | int rc; | |
187 | ||
188 | rc = usb_control_msg(port->serial->dev, | |
189 | usb_sndctrlpipe(port->serial->dev, 0), | |
190 | KL5KUSB105A_SIO_SET_DATA, | |
191 | USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
192 | 0, /* value */ | |
193 | 0, /* index */ | |
194 | settings, | |
195 | sizeof(struct klsi_105_port_settings), | |
196 | KLSI_TIMEOUT); | |
197 | if (rc < 0) | |
198 | err("Change port settings failed (error = %d)", rc); | |
199 | info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d", | |
200 | __FUNCTION__, | |
201 | settings->pktlen, | |
202 | settings->baudrate, settings->databits, | |
203 | settings->unknown1, settings->unknown2); | |
204 | return rc; | |
205 | } /* klsi_105_chg_port_settings */ | |
206 | ||
207 | /* translate a 16-bit status value from the device to linux's TIO bits */ | |
208 | static unsigned long klsi_105_status2linestate(const __u16 status) | |
209 | { | |
210 | unsigned long res = 0; | |
211 | ||
212 | res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) | |
213 | | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0) | |
214 | ; | |
215 | ||
216 | return res; | |
217 | } | |
218 | /* | |
219 | * Read line control via vendor command and return result through | |
220 | * *line_state_p | |
221 | */ | |
222 | /* It seems that the status buffer has always only 2 bytes length */ | |
223 | #define KLSI_STATUSBUF_LEN 2 | |
224 | static int klsi_105_get_line_state(struct usb_serial_port *port, | |
225 | unsigned long *line_state_p) | |
226 | { | |
227 | int rc; | |
228 | __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1}; | |
229 | __u16 status; | |
230 | ||
231 | info("%s - sending SIO Poll request", __FUNCTION__); | |
232 | rc = usb_control_msg(port->serial->dev, | |
233 | usb_rcvctrlpipe(port->serial->dev, 0), | |
234 | KL5KUSB105A_SIO_POLL, | |
235 | USB_TYPE_VENDOR | USB_DIR_IN, | |
236 | 0, /* value */ | |
237 | 0, /* index */ | |
238 | status_buf, KLSI_STATUSBUF_LEN, | |
239 | 10000 | |
240 | ); | |
241 | if (rc < 0) | |
242 | err("Reading line status failed (error = %d)", rc); | |
243 | else { | |
244 | status = status_buf[0] + (status_buf[1]<<8); | |
245 | ||
246 | info("%s - read status %x %x", __FUNCTION__, | |
247 | status_buf[0], status_buf[1]); | |
248 | ||
249 | *line_state_p = klsi_105_status2linestate(status); | |
250 | } | |
251 | ||
252 | return rc; | |
253 | } | |
254 | ||
255 | ||
256 | /* | |
257 | * Driver's tty interface functions | |
258 | */ | |
259 | ||
260 | static int klsi_105_startup (struct usb_serial *serial) | |
261 | { | |
262 | struct klsi_105_private *priv; | |
263 | int i; | |
264 | ||
265 | /* check if we support the product id (see keyspan.c) | |
266 | * FIXME | |
267 | */ | |
268 | ||
269 | /* allocate the private data structure */ | |
270 | for (i=0; i<serial->num_ports; i++) { | |
271 | int j; | |
272 | priv = kmalloc(sizeof(struct klsi_105_private), | |
273 | GFP_KERNEL); | |
274 | if (!priv) { | |
275 | dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__); | |
276 | return -ENOMEM; | |
277 | } | |
278 | /* set initial values for control structures */ | |
279 | priv->cfg.pktlen = 5; | |
280 | priv->cfg.baudrate = kl5kusb105a_sio_b9600; | |
281 | priv->cfg.databits = kl5kusb105a_dtb_8; | |
282 | priv->cfg.unknown1 = 0; | |
283 | priv->cfg.unknown2 = 1; | |
284 | ||
285 | priv->line_state = 0; | |
286 | ||
287 | priv->bytes_in = 0; | |
288 | priv->bytes_out = 0; | |
289 | usb_set_serial_port_data(serial->port[i], priv); | |
290 | ||
291 | spin_lock_init (&priv->lock); | |
292 | for (j=0; j<NUM_URBS; j++) { | |
293 | struct urb* urb = usb_alloc_urb(0, GFP_KERNEL); | |
294 | ||
295 | priv->write_urb_pool[j] = urb; | |
296 | if (urb == NULL) { | |
297 | err("No more urbs???"); | |
298 | continue; | |
299 | } | |
300 | ||
301 | urb->transfer_buffer = NULL; | |
302 | urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, | |
303 | GFP_KERNEL); | |
304 | if (!urb->transfer_buffer) { | |
305 | err("%s - out of memory for urb buffers.", __FUNCTION__); | |
306 | continue; | |
307 | } | |
308 | } | |
309 | ||
310 | /* priv->termios is left uninitalized until port opening */ | |
311 | init_waitqueue_head(&serial->port[i]->write_wait); | |
312 | } | |
313 | ||
314 | return (0); | |
315 | } /* klsi_105_startup */ | |
316 | ||
317 | ||
318 | static void klsi_105_shutdown (struct usb_serial *serial) | |
319 | { | |
320 | int i; | |
321 | ||
322 | dbg("%s", __FUNCTION__); | |
323 | ||
324 | /* stop reads and writes on all ports */ | |
325 | for (i=0; i < serial->num_ports; ++i) { | |
326 | struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]); | |
327 | unsigned long flags; | |
328 | ||
329 | if (priv) { | |
330 | /* kill our write urb pool */ | |
331 | int j; | |
332 | struct urb **write_urbs = priv->write_urb_pool; | |
333 | spin_lock_irqsave(&priv->lock,flags); | |
334 | ||
335 | for (j = 0; j < NUM_URBS; j++) { | |
336 | if (write_urbs[j]) { | |
337 | /* FIXME - uncomment the following | |
338 | * usb_kill_urb call when the host | |
339 | * controllers get fixed to set | |
340 | * urb->dev = NULL after the urb is | |
341 | * finished. Otherwise this call | |
342 | * oopses. */ | |
343 | /* usb_kill_urb(write_urbs[j]); */ | |
344 | if (write_urbs[j]->transfer_buffer) | |
345 | kfree(write_urbs[j]->transfer_buffer); | |
346 | usb_free_urb (write_urbs[j]); | |
347 | } | |
348 | } | |
349 | ||
350 | spin_unlock_irqrestore (&priv->lock, flags); | |
351 | ||
352 | kfree(priv); | |
353 | usb_set_serial_port_data(serial->port[i], NULL); | |
354 | } | |
355 | } | |
356 | } /* klsi_105_shutdown */ | |
357 | ||
358 | static int klsi_105_open (struct usb_serial_port *port, struct file *filp) | |
359 | { | |
360 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
361 | int retval = 0; | |
362 | int rc; | |
363 | int i; | |
364 | unsigned long line_state; | |
365 | struct klsi_105_port_settings cfg; | |
366 | unsigned long flags; | |
367 | ||
368 | dbg("%s port %d", __FUNCTION__, port->number); | |
369 | ||
370 | /* force low_latency on so that our tty_push actually forces | |
371 | * the data through | |
372 | * port->tty->low_latency = 1; */ | |
373 | ||
374 | /* Do a defined restart: | |
375 | * Set up sane default baud rate and send the 'READ_ON' | |
376 | * vendor command. | |
377 | * FIXME: set modem line control (how?) | |
378 | * Then read the modem line control and store values in | |
379 | * priv->line_state. | |
380 | */ | |
381 | cfg.pktlen = 5; | |
382 | cfg.baudrate = kl5kusb105a_sio_b9600; | |
383 | cfg.databits = kl5kusb105a_dtb_8; | |
384 | cfg.unknown1 = 0; | |
385 | cfg.unknown2 = 1; | |
386 | klsi_105_chg_port_settings(port, &cfg); | |
387 | ||
388 | /* set up termios structure */ | |
389 | spin_lock_irqsave (&priv->lock, flags); | |
390 | priv->termios.c_iflag = port->tty->termios->c_iflag; | |
391 | priv->termios.c_oflag = port->tty->termios->c_oflag; | |
392 | priv->termios.c_cflag = port->tty->termios->c_cflag; | |
393 | priv->termios.c_lflag = port->tty->termios->c_lflag; | |
394 | for (i=0; i<NCCS; i++) | |
395 | priv->termios.c_cc[i] = port->tty->termios->c_cc[i]; | |
396 | priv->cfg.pktlen = cfg.pktlen; | |
397 | priv->cfg.baudrate = cfg.baudrate; | |
398 | priv->cfg.databits = cfg.databits; | |
399 | priv->cfg.unknown1 = cfg.unknown1; | |
400 | priv->cfg.unknown2 = cfg.unknown2; | |
401 | spin_unlock_irqrestore (&priv->lock, flags); | |
402 | ||
403 | /* READ_ON and urb submission */ | |
404 | usb_fill_bulk_urb(port->read_urb, port->serial->dev, | |
405 | usb_rcvbulkpipe(port->serial->dev, | |
406 | port->bulk_in_endpointAddress), | |
407 | port->read_urb->transfer_buffer, | |
408 | port->read_urb->transfer_buffer_length, | |
409 | klsi_105_read_bulk_callback, | |
410 | port); | |
411 | ||
412 | rc = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
413 | if (rc) { | |
414 | err("%s - failed submitting read urb, error %d", __FUNCTION__, rc); | |
415 | retval = rc; | |
416 | goto exit; | |
417 | } | |
418 | ||
419 | rc = usb_control_msg(port->serial->dev, | |
420 | usb_sndctrlpipe(port->serial->dev,0), | |
421 | KL5KUSB105A_SIO_CONFIGURE, | |
422 | USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE, | |
423 | KL5KUSB105A_SIO_CONFIGURE_READ_ON, | |
424 | 0, /* index */ | |
425 | NULL, | |
426 | 0, | |
427 | KLSI_TIMEOUT); | |
428 | if (rc < 0) { | |
429 | err("Enabling read failed (error = %d)", rc); | |
430 | retval = rc; | |
431 | } else | |
432 | dbg("%s - enabled reading", __FUNCTION__); | |
433 | ||
434 | rc = klsi_105_get_line_state(port, &line_state); | |
435 | if (rc >= 0) { | |
436 | spin_lock_irqsave (&priv->lock, flags); | |
437 | priv->line_state = line_state; | |
438 | spin_unlock_irqrestore (&priv->lock, flags); | |
439 | dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); | |
440 | retval = 0; | |
441 | } else | |
442 | retval = rc; | |
443 | ||
444 | exit: | |
445 | return retval; | |
446 | } /* klsi_105_open */ | |
447 | ||
448 | ||
449 | static void klsi_105_close (struct usb_serial_port *port, struct file *filp) | |
450 | { | |
451 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
452 | int rc; | |
453 | ||
454 | dbg("%s port %d", __FUNCTION__, port->number); | |
455 | ||
456 | /* send READ_OFF */ | |
457 | rc = usb_control_msg (port->serial->dev, | |
458 | usb_sndctrlpipe(port->serial->dev, 0), | |
459 | KL5KUSB105A_SIO_CONFIGURE, | |
460 | USB_TYPE_VENDOR | USB_DIR_OUT, | |
461 | KL5KUSB105A_SIO_CONFIGURE_READ_OFF, | |
462 | 0, /* index */ | |
463 | NULL, 0, | |
464 | KLSI_TIMEOUT); | |
465 | if (rc < 0) | |
466 | err("Disabling read failed (error = %d)", rc); | |
467 | ||
468 | /* shutdown our bulk reads and writes */ | |
469 | usb_kill_urb(port->write_urb); | |
470 | usb_kill_urb(port->read_urb); | |
471 | /* unlink our write pool */ | |
472 | /* FIXME */ | |
473 | /* wgg - do I need this? I think so. */ | |
474 | usb_kill_urb(port->interrupt_in_urb); | |
475 | info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out); | |
476 | } /* klsi_105_close */ | |
477 | ||
478 | ||
479 | /* We need to write a complete 64-byte data block and encode the | |
480 | * number actually sent in the first double-byte, LSB-order. That | |
481 | * leaves at most 62 bytes of payload. | |
482 | */ | |
483 | #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */ | |
484 | ||
485 | ||
486 | static int klsi_105_write (struct usb_serial_port *port, | |
487 | const unsigned char *buf, int count) | |
488 | { | |
489 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
490 | int result, size; | |
491 | int bytes_sent=0; | |
492 | ||
493 | dbg("%s - port %d", __FUNCTION__, port->number); | |
494 | ||
495 | while (count > 0) { | |
496 | /* try to find a free urb (write 0 bytes if none) */ | |
497 | struct urb *urb = NULL; | |
498 | unsigned long flags; | |
499 | int i; | |
500 | /* since the pool is per-port we might not need the spin lock !? */ | |
501 | spin_lock_irqsave (&priv->lock, flags); | |
502 | for (i=0; i<NUM_URBS; i++) { | |
503 | if (priv->write_urb_pool[i]->status != -EINPROGRESS) { | |
504 | urb = priv->write_urb_pool[i]; | |
505 | dbg("%s - using pool URB %d", __FUNCTION__, i); | |
506 | break; | |
507 | } | |
508 | } | |
509 | spin_unlock_irqrestore (&priv->lock, flags); | |
510 | ||
511 | if (urb==NULL) { | |
512 | dbg("%s - no more free urbs", __FUNCTION__); | |
513 | goto exit; | |
514 | } | |
515 | ||
516 | if (urb->transfer_buffer == NULL) { | |
517 | urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC); | |
518 | if (urb->transfer_buffer == NULL) { | |
519 | err("%s - no more kernel memory...", __FUNCTION__); | |
520 | goto exit; | |
521 | } | |
522 | } | |
523 | ||
524 | size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET); | |
525 | size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET); | |
526 | ||
527 | memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size); | |
528 | ||
529 | /* write payload size into transfer buffer */ | |
530 | ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF); | |
531 | ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8); | |
532 | ||
533 | /* set up our urb */ | |
534 | usb_fill_bulk_urb(urb, port->serial->dev, | |
535 | usb_sndbulkpipe(port->serial->dev, | |
536 | port->bulk_out_endpointAddress), | |
537 | urb->transfer_buffer, | |
538 | URB_TRANSFER_BUFFER_SIZE, | |
539 | klsi_105_write_bulk_callback, | |
540 | port); | |
541 | ||
542 | /* send the data out the bulk port */ | |
543 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
544 | if (result) { | |
545 | err("%s - failed submitting write urb, error %d", __FUNCTION__, result); | |
546 | goto exit; | |
547 | } | |
548 | buf += size; | |
549 | bytes_sent += size; | |
550 | count -= size; | |
551 | } | |
552 | exit: | |
553 | /* lockless, but it's for debug info only... */ | |
554 | priv->bytes_out+=bytes_sent; | |
555 | ||
556 | return bytes_sent; /* that's how much we wrote */ | |
557 | } /* klsi_105_write */ | |
558 | ||
559 | static void klsi_105_write_bulk_callback ( struct urb *urb, struct pt_regs *regs) | |
560 | { | |
561 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
562 | ||
563 | dbg("%s - port %d", __FUNCTION__, port->number); | |
564 | ||
565 | if (urb->status) { | |
566 | dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, | |
567 | urb->status); | |
568 | return; | |
569 | } | |
570 | ||
571 | /* from generic_write_bulk_callback */ | |
572 | schedule_work(&port->work); | |
573 | } /* klsi_105_write_bulk_completion_callback */ | |
574 | ||
575 | ||
576 | /* return number of characters currently in the writing process */ | |
577 | static int klsi_105_chars_in_buffer (struct usb_serial_port *port) | |
578 | { | |
579 | int chars = 0; | |
580 | int i; | |
581 | unsigned long flags; | |
582 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
583 | ||
584 | spin_lock_irqsave (&priv->lock, flags); | |
585 | ||
586 | for (i = 0; i < NUM_URBS; ++i) { | |
587 | if (priv->write_urb_pool[i]->status == -EINPROGRESS) { | |
588 | chars += URB_TRANSFER_BUFFER_SIZE; | |
589 | } | |
590 | } | |
591 | ||
592 | spin_unlock_irqrestore (&priv->lock, flags); | |
593 | ||
594 | dbg("%s - returns %d", __FUNCTION__, chars); | |
595 | return (chars); | |
596 | } | |
597 | ||
598 | static int klsi_105_write_room (struct usb_serial_port *port) | |
599 | { | |
600 | unsigned long flags; | |
601 | int i; | |
602 | int room = 0; | |
603 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
604 | ||
605 | spin_lock_irqsave (&priv->lock, flags); | |
606 | for (i = 0; i < NUM_URBS; ++i) { | |
607 | if (priv->write_urb_pool[i]->status != -EINPROGRESS) { | |
608 | room += URB_TRANSFER_BUFFER_SIZE; | |
609 | } | |
610 | } | |
611 | ||
612 | spin_unlock_irqrestore (&priv->lock, flags); | |
613 | ||
614 | dbg("%s - returns %d", __FUNCTION__, room); | |
615 | return (room); | |
616 | } | |
617 | ||
618 | ||
619 | ||
620 | static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs) | |
621 | { | |
622 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
623 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
624 | struct tty_struct *tty; | |
625 | unsigned char *data = urb->transfer_buffer; | |
626 | int rc; | |
627 | ||
628 | dbg("%s - port %d", __FUNCTION__, port->number); | |
629 | ||
630 | /* The urb might have been killed. */ | |
631 | if (urb->status) { | |
632 | dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, | |
633 | urb->status); | |
634 | return; | |
635 | } | |
636 | ||
637 | /* The data received is again preceded by a length double-byte in LSB- | |
638 | * first order (see klsi_105_write() ) | |
639 | */ | |
640 | if (urb->actual_length == 0) { | |
641 | /* empty urbs seem to happen, we ignore them */ | |
642 | /* dbg("%s - emtpy URB", __FUNCTION__); */ | |
643 | ; | |
644 | } else if (urb->actual_length <= 2) { | |
645 | dbg("%s - size %d URB not understood", __FUNCTION__, | |
646 | urb->actual_length); | |
647 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, | |
648 | urb->actual_length, data); | |
649 | } else { | |
650 | int i; | |
651 | int bytes_sent = ((__u8 *) data)[0] + | |
652 | ((unsigned int) ((__u8 *) data)[1] << 8); | |
653 | tty = port->tty; | |
654 | /* we should immediately resubmit the URB, before attempting | |
655 | * to pass the data on to the tty layer. But that needs locking | |
656 | * against re-entry an then mixed-up data because of | |
657 | * intermixed tty_flip_buffer_push()s | |
658 | * FIXME | |
659 | */ | |
660 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, | |
661 | urb->actual_length, data); | |
662 | ||
663 | if (bytes_sent + 2 > urb->actual_length) { | |
664 | dbg("%s - trying to read more data than available" | |
665 | " (%d vs. %d)", __FUNCTION__, | |
666 | bytes_sent+2, urb->actual_length); | |
667 | /* cap at implied limit */ | |
668 | bytes_sent = urb->actual_length - 2; | |
669 | } | |
670 | ||
671 | for (i = 2; i < 2+bytes_sent; i++) { | |
672 | /* if we insert more than TTY_FLIPBUF_SIZE characters, | |
673 | * we drop them. */ | |
674 | if(tty->flip.count >= TTY_FLIPBUF_SIZE) { | |
675 | tty_flip_buffer_push(tty); | |
676 | } | |
677 | /* this doesn't actually push the data through unless | |
678 | * tty->low_latency is set */ | |
679 | tty_insert_flip_char(tty, ((__u8*) data)[i], 0); | |
680 | } | |
681 | tty_flip_buffer_push(tty); | |
682 | ||
683 | /* again lockless, but debug info only */ | |
684 | priv->bytes_in += bytes_sent; | |
685 | } | |
686 | /* Continue trying to always read */ | |
687 | usb_fill_bulk_urb(port->read_urb, port->serial->dev, | |
688 | usb_rcvbulkpipe(port->serial->dev, | |
689 | port->bulk_in_endpointAddress), | |
690 | port->read_urb->transfer_buffer, | |
691 | port->read_urb->transfer_buffer_length, | |
692 | klsi_105_read_bulk_callback, | |
693 | port); | |
694 | rc = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
695 | if (rc) | |
696 | err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc); | |
697 | } /* klsi_105_read_bulk_callback */ | |
698 | ||
699 | ||
700 | static void klsi_105_set_termios (struct usb_serial_port *port, | |
701 | struct termios *old_termios) | |
702 | { | |
703 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
704 | unsigned int iflag = port->tty->termios->c_iflag; | |
705 | unsigned int old_iflag = old_termios->c_iflag; | |
706 | unsigned int cflag = port->tty->termios->c_cflag; | |
707 | unsigned int old_cflag = old_termios->c_cflag; | |
708 | struct klsi_105_port_settings cfg; | |
709 | unsigned long flags; | |
710 | ||
711 | /* lock while we are modifying the settings */ | |
712 | spin_lock_irqsave (&priv->lock, flags); | |
713 | ||
714 | /* | |
715 | * Update baud rate | |
716 | */ | |
717 | if( (cflag & CBAUD) != (old_cflag & CBAUD) ) { | |
718 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
719 | if( (old_cflag & CBAUD) == B0 ) { | |
720 | dbg("%s: baud was B0", __FUNCTION__); | |
721 | #if 0 | |
722 | priv->control_state |= TIOCM_DTR; | |
723 | /* don't set RTS if using hardware flow control */ | |
724 | if (!(old_cflag & CRTSCTS)) { | |
725 | priv->control_state |= TIOCM_RTS; | |
726 | } | |
727 | mct_u232_set_modem_ctrl(serial, priv->control_state); | |
728 | #endif | |
729 | } | |
730 | ||
731 | switch(cflag & CBAUD) { | |
732 | case B0: /* handled below */ | |
733 | break; | |
734 | case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200; | |
735 | break; | |
736 | case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400; | |
737 | break; | |
738 | case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800; | |
739 | break; | |
740 | case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600; | |
741 | break; | |
742 | case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200; | |
743 | break; | |
744 | case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400; | |
745 | break; | |
746 | case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600; | |
747 | break; | |
748 | case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200; | |
749 | break; | |
750 | default: | |
751 | err("KLSI USB->Serial converter:" | |
752 | " unsupported baudrate request, using default" | |
753 | " of 9600"); | |
754 | priv->cfg.baudrate = kl5kusb105a_sio_b9600; | |
755 | break; | |
756 | } | |
757 | if ((cflag & CBAUD) == B0 ) { | |
758 | dbg("%s: baud is B0", __FUNCTION__); | |
759 | /* Drop RTS and DTR */ | |
760 | /* maybe this should be simulated by sending read | |
761 | * disable and read enable messages? | |
762 | */ | |
763 | ; | |
764 | #if 0 | |
765 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
766 | mct_u232_set_modem_ctrl(serial, priv->control_state); | |
767 | #endif | |
768 | } | |
769 | } | |
770 | ||
771 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { | |
772 | /* set the number of data bits */ | |
773 | switch (cflag & CSIZE) { | |
774 | case CS5: | |
775 | dbg("%s - 5 bits/byte not supported", __FUNCTION__); | |
776 | spin_unlock_irqrestore (&priv->lock, flags); | |
777 | return ; | |
778 | case CS6: | |
779 | dbg("%s - 6 bits/byte not supported", __FUNCTION__); | |
780 | spin_unlock_irqrestore (&priv->lock, flags); | |
781 | return ; | |
782 | case CS7: | |
783 | priv->cfg.databits = kl5kusb105a_dtb_7; | |
784 | break; | |
785 | case CS8: | |
786 | priv->cfg.databits = kl5kusb105a_dtb_8; | |
787 | break; | |
788 | default: | |
789 | err("CSIZE was not CS5-CS8, using default of 8"); | |
790 | priv->cfg.databits = kl5kusb105a_dtb_8; | |
791 | break; | |
792 | } | |
793 | } | |
794 | ||
795 | /* | |
796 | * Update line control register (LCR) | |
797 | */ | |
798 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) | |
799 | || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) { | |
800 | ||
801 | #if 0 | |
802 | priv->last_lcr = 0; | |
803 | ||
804 | /* set the parity */ | |
805 | if (cflag & PARENB) | |
806 | priv->last_lcr |= (cflag & PARODD) ? | |
807 | MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; | |
808 | else | |
809 | priv->last_lcr |= MCT_U232_PARITY_NONE; | |
810 | ||
811 | /* set the number of stop bits */ | |
812 | priv->last_lcr |= (cflag & CSTOPB) ? | |
813 | MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; | |
814 | ||
815 | mct_u232_set_line_ctrl(serial, priv->last_lcr); | |
816 | #endif | |
817 | ; | |
818 | } | |
819 | ||
820 | /* | |
821 | * Set flow control: well, I do not really now how to handle DTR/RTS. | |
822 | * Just do what we have seen with SniffUSB on Win98. | |
823 | */ | |
824 | if( (iflag & IXOFF) != (old_iflag & IXOFF) | |
825 | || (iflag & IXON) != (old_iflag & IXON) | |
826 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) { | |
827 | ||
828 | /* Drop DTR/RTS if no flow control otherwise assert */ | |
829 | #if 0 | |
830 | if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) ) | |
831 | priv->control_state |= TIOCM_DTR | TIOCM_RTS; | |
832 | else | |
833 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
834 | mct_u232_set_modem_ctrl(serial, priv->control_state); | |
835 | #endif | |
836 | ; | |
837 | } | |
838 | memcpy (&cfg, &priv->cfg, sizeof(cfg)); | |
839 | spin_unlock_irqrestore (&priv->lock, flags); | |
840 | ||
841 | /* now commit changes to device */ | |
842 | klsi_105_chg_port_settings(port, &cfg); | |
843 | } /* klsi_105_set_termios */ | |
844 | ||
845 | ||
846 | #if 0 | |
847 | static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state ) | |
848 | { | |
849 | struct usb_serial *serial = port->serial; | |
850 | struct mct_u232_private *priv = (struct mct_u232_private *)port->private; | |
851 | unsigned char lcr = priv->last_lcr; | |
852 | ||
853 | dbg("%sstate=%d", __FUNCTION__, break_state); | |
854 | ||
855 | if (break_state) | |
856 | lcr |= MCT_U232_SET_BREAK; | |
857 | ||
858 | mct_u232_set_line_ctrl(serial, lcr); | |
859 | } /* mct_u232_break_ctl */ | |
860 | #endif | |
861 | ||
862 | static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file) | |
863 | { | |
864 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
865 | unsigned long flags; | |
866 | int rc; | |
867 | unsigned long line_state; | |
868 | dbg("%s - request, just guessing", __FUNCTION__); | |
869 | ||
870 | rc = klsi_105_get_line_state(port, &line_state); | |
871 | if (rc < 0) { | |
872 | err("Reading line control failed (error = %d)", rc); | |
873 | /* better return value? EAGAIN? */ | |
874 | return rc; | |
875 | } | |
876 | ||
877 | spin_lock_irqsave (&priv->lock, flags); | |
878 | priv->line_state = line_state; | |
879 | spin_unlock_irqrestore (&priv->lock, flags); | |
880 | dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); | |
881 | return (int)line_state; | |
882 | } | |
883 | ||
884 | static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file, | |
885 | unsigned int set, unsigned int clear) | |
886 | { | |
887 | int retval = -EINVAL; | |
888 | ||
889 | dbg("%s", __FUNCTION__); | |
890 | ||
891 | /* if this ever gets implemented, it should be done something like this: | |
892 | struct usb_serial *serial = port->serial; | |
893 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
894 | unsigned long flags; | |
895 | int control; | |
896 | ||
897 | spin_lock_irqsave (&priv->lock, flags); | |
898 | if (set & TIOCM_RTS) | |
899 | priv->control_state |= TIOCM_RTS; | |
900 | if (set & TIOCM_DTR) | |
901 | priv->control_state |= TIOCM_DTR; | |
902 | if (clear & TIOCM_RTS) | |
903 | priv->control_state &= ~TIOCM_RTS; | |
904 | if (clear & TIOCM_DTR) | |
905 | priv->control_state &= ~TIOCM_DTR; | |
906 | control = priv->control_state; | |
907 | spin_unlock_irqrestore (&priv->lock, flags); | |
908 | retval = mct_u232_set_modem_ctrl(serial, control); | |
909 | */ | |
910 | return retval; | |
911 | } | |
912 | ||
913 | static int klsi_105_ioctl (struct usb_serial_port *port, struct file * file, | |
914 | unsigned int cmd, unsigned long arg) | |
915 | { | |
916 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
917 | void __user *user_arg = (void __user *)arg; | |
918 | ||
919 | dbg("%scmd=0x%x", __FUNCTION__, cmd); | |
920 | ||
921 | /* Based on code from acm.c and others */ | |
922 | switch (cmd) { | |
923 | case TIOCMIWAIT: | |
924 | /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/ | |
925 | /* TODO */ | |
926 | dbg("%s - TIOCMIWAIT not handled", __FUNCTION__); | |
927 | return -ENOIOCTLCMD; | |
928 | case TIOCGICOUNT: | |
929 | /* return count of modemline transitions */ | |
930 | /* TODO */ | |
931 | dbg("%s - TIOCGICOUNT not handled", __FUNCTION__); | |
932 | return -ENOIOCTLCMD; | |
933 | case TCGETS: | |
934 | /* return current info to caller */ | |
935 | dbg("%s - TCGETS data faked/incomplete", __FUNCTION__); | |
936 | ||
937 | if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct termios))) | |
938 | return -EFAULT; | |
939 | ||
940 | if (kernel_termios_to_user_termios((struct termios __user *)arg, | |
941 | &priv->termios)) | |
942 | return -EFAULT; | |
943 | return 0; | |
944 | case TCSETS: | |
945 | /* set port termios to the one given by the user */ | |
946 | dbg("%s - TCSETS not handled", __FUNCTION__); | |
947 | ||
948 | if (!access_ok(VERIFY_READ, user_arg, sizeof(struct termios))) | |
949 | return -EFAULT; | |
950 | ||
951 | if (user_termios_to_kernel_termios(&priv->termios, | |
952 | (struct termios __user *)arg)) | |
953 | return -EFAULT; | |
954 | klsi_105_set_termios(port, &priv->termios); | |
955 | return 0; | |
956 | case TCSETSW: { | |
957 | /* set port termios and try to wait for completion of last | |
958 | * write operation */ | |
959 | /* We guess here. If there are not too many write urbs | |
960 | * outstanding, we lie. */ | |
961 | /* what is the right way to wait here? schedule() ? */ | |
962 | /* | |
963 | while (klsi_105_chars_in_buffer(port) > (NUM_URBS / 4 ) * URB_TRANSFER_BUFFER_SIZE) | |
964 | schedule(); | |
965 | */ | |
966 | return -ENOIOCTLCMD; | |
967 | } | |
968 | default: | |
969 | dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd); | |
970 | return(-ENOIOCTLCMD); | |
971 | break; | |
972 | } | |
973 | return 0; | |
974 | } /* klsi_105_ioctl */ | |
975 | ||
976 | static void klsi_105_throttle (struct usb_serial_port *port) | |
977 | { | |
978 | dbg("%s - port %d", __FUNCTION__, port->number); | |
979 | usb_kill_urb(port->read_urb); | |
980 | } | |
981 | ||
982 | static void klsi_105_unthrottle (struct usb_serial_port *port) | |
983 | { | |
984 | int result; | |
985 | ||
986 | dbg("%s - port %d", __FUNCTION__, port->number); | |
987 | ||
988 | port->read_urb->dev = port->serial->dev; | |
989 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
990 | if (result) | |
991 | err("%s - failed submitting read urb, error %d", __FUNCTION__, | |
992 | result); | |
993 | } | |
994 | ||
995 | ||
996 | ||
997 | static int __init klsi_105_init (void) | |
998 | { | |
999 | int retval; | |
1000 | retval = usb_serial_register(&kl5kusb105d_device); | |
1001 | if (retval) | |
1002 | goto failed_usb_serial_register; | |
1003 | retval = usb_register(&kl5kusb105d_driver); | |
1004 | if (retval) | |
1005 | goto failed_usb_register; | |
1006 | ||
1007 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1008 | return 0; | |
1009 | failed_usb_register: | |
1010 | usb_serial_deregister(&kl5kusb105d_device); | |
1011 | failed_usb_serial_register: | |
1012 | return retval; | |
1013 | } | |
1014 | ||
1015 | ||
1016 | static void __exit klsi_105_exit (void) | |
1017 | { | |
1018 | usb_deregister (&kl5kusb105d_driver); | |
1019 | usb_serial_deregister (&kl5kusb105d_device); | |
1020 | } | |
1021 | ||
1022 | ||
1023 | module_init (klsi_105_init); | |
1024 | module_exit (klsi_105_exit); | |
1025 | ||
1026 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1027 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1028 | MODULE_LICENSE("GPL"); | |
1029 | ||
1030 | ||
1031 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1032 | MODULE_PARM_DESC(debug, "enable extensive debugging messages"); | |
1033 | ||
1034 | /* vim: set sts=8 ts=8 sw=8: */ |