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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 | ||
1da177e4 LT |
48 | #include <linux/kernel.h> |
49 | #include <linux/errno.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/slab.h> | |
52 | #include <linux/tty.h> | |
53 | #include <linux/tty_driver.h> | |
54 | #include <linux/tty_flip.h> | |
55 | #include <linux/module.h> | |
56 | #include <asm/uaccess.h> | |
57 | #include <linux/usb.h> | |
a969888c | 58 | #include <linux/usb/serial.h> |
1da177e4 LT |
59 | #include "kl5kusb105.h" |
60 | ||
61 | static int debug; | |
62 | ||
63 | /* | |
64 | * Version Information | |
65 | */ | |
66 | #define DRIVER_VERSION "v0.3a" | |
67 | #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>" | |
68 | #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver" | |
69 | ||
70 | ||
71 | /* | |
72 | * Function prototypes | |
73 | */ | |
74 | static int klsi_105_startup (struct usb_serial *serial); | |
75 | static void klsi_105_shutdown (struct usb_serial *serial); | |
76 | static int klsi_105_open (struct usb_serial_port *port, | |
77 | struct file *filp); | |
78 | static void klsi_105_close (struct usb_serial_port *port, | |
79 | struct file *filp); | |
80 | static int klsi_105_write (struct usb_serial_port *port, | |
81 | const unsigned char *buf, | |
82 | int count); | |
7d12e780 | 83 | static void klsi_105_write_bulk_callback (struct urb *urb); |
1da177e4 LT |
84 | static int klsi_105_chars_in_buffer (struct usb_serial_port *port); |
85 | static int klsi_105_write_room (struct usb_serial_port *port); | |
86 | ||
7d12e780 | 87 | static void klsi_105_read_bulk_callback (struct urb *urb); |
1da177e4 | 88 | static void klsi_105_set_termios (struct usb_serial_port *port, |
606d099c | 89 | struct ktermios *old); |
1da177e4 LT |
90 | static void klsi_105_throttle (struct usb_serial_port *port); |
91 | static void klsi_105_unthrottle (struct usb_serial_port *port); | |
92 | /* | |
93 | static void klsi_105_break_ctl (struct usb_serial_port *port, | |
94 | int break_state ); | |
95 | */ | |
96 | static int klsi_105_tiocmget (struct usb_serial_port *port, | |
97 | struct file *file); | |
98 | static int klsi_105_tiocmset (struct usb_serial_port *port, | |
99 | struct file *file, unsigned int set, | |
100 | unsigned int clear); | |
101 | ||
102 | /* | |
103 | * All of the device info needed for the KLSI converters. | |
104 | */ | |
105 | static struct usb_device_id id_table [] = { | |
106 | { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) }, | |
107 | { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) }, | |
108 | { } /* Terminating entry */ | |
109 | }; | |
110 | ||
111 | MODULE_DEVICE_TABLE (usb, id_table); | |
112 | ||
113 | static struct usb_driver kl5kusb105d_driver = { | |
1da177e4 LT |
114 | .name = "kl5kusb105d", |
115 | .probe = usb_serial_probe, | |
116 | .disconnect = usb_serial_disconnect, | |
117 | .id_table = id_table, | |
ba9dc657 | 118 | .no_dynamic_id = 1, |
1da177e4 LT |
119 | }; |
120 | ||
ea65370d | 121 | static struct usb_serial_driver kl5kusb105d_device = { |
18fcac35 GKH |
122 | .driver = { |
123 | .owner = THIS_MODULE, | |
269bda1c | 124 | .name = "kl5kusb105d", |
18fcac35 | 125 | }, |
269bda1c | 126 | .description = "KL5KUSB105D / PalmConnect", |
d9b1b787 | 127 | .usb_driver = &kl5kusb105d_driver, |
1da177e4 LT |
128 | .id_table = id_table, |
129 | .num_interrupt_in = 1, | |
130 | .num_bulk_in = 1, | |
131 | .num_bulk_out = 1, | |
132 | .num_ports = 1, | |
133 | .open = klsi_105_open, | |
134 | .close = klsi_105_close, | |
135 | .write = klsi_105_write, | |
136 | .write_bulk_callback = klsi_105_write_bulk_callback, | |
137 | .chars_in_buffer = klsi_105_chars_in_buffer, | |
138 | .write_room = klsi_105_write_room, | |
139 | .read_bulk_callback =klsi_105_read_bulk_callback, | |
1da177e4 LT |
140 | .set_termios = klsi_105_set_termios, |
141 | /*.break_ctl = klsi_105_break_ctl,*/ | |
142 | .tiocmget = klsi_105_tiocmget, | |
143 | .tiocmset = klsi_105_tiocmset, | |
144 | .attach = klsi_105_startup, | |
145 | .shutdown = klsi_105_shutdown, | |
146 | .throttle = klsi_105_throttle, | |
147 | .unthrottle = klsi_105_unthrottle, | |
148 | }; | |
149 | ||
150 | struct klsi_105_port_settings { | |
151 | __u8 pktlen; /* always 5, it seems */ | |
152 | __u8 baudrate; | |
153 | __u8 databits; | |
154 | __u8 unknown1; | |
155 | __u8 unknown2; | |
156 | } __attribute__ ((packed)); | |
157 | ||
158 | /* we implement a pool of NUM_URBS urbs per usb_serial */ | |
159 | #define NUM_URBS 1 | |
160 | #define URB_TRANSFER_BUFFER_SIZE 64 | |
161 | struct klsi_105_private { | |
162 | struct klsi_105_port_settings cfg; | |
606d099c | 163 | struct ktermios termios; |
1da177e4 LT |
164 | unsigned long line_state; /* modem line settings */ |
165 | /* write pool */ | |
166 | struct urb * write_urb_pool[NUM_URBS]; | |
167 | spinlock_t lock; | |
168 | unsigned long bytes_in; | |
169 | unsigned long bytes_out; | |
170 | }; | |
171 | ||
172 | ||
173 | /* | |
174 | * Handle vendor specific USB requests | |
175 | */ | |
176 | ||
177 | ||
178 | #define KLSI_TIMEOUT 5000 /* default urb timeout */ | |
179 | ||
180 | static int klsi_105_chg_port_settings(struct usb_serial_port *port, | |
181 | struct klsi_105_port_settings *settings) | |
182 | { | |
183 | int rc; | |
184 | ||
185 | rc = usb_control_msg(port->serial->dev, | |
186 | usb_sndctrlpipe(port->serial->dev, 0), | |
187 | KL5KUSB105A_SIO_SET_DATA, | |
188 | USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE, | |
189 | 0, /* value */ | |
190 | 0, /* index */ | |
191 | settings, | |
192 | sizeof(struct klsi_105_port_settings), | |
193 | KLSI_TIMEOUT); | |
194 | if (rc < 0) | |
195 | err("Change port settings failed (error = %d)", rc); | |
196 | info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d", | |
197 | __FUNCTION__, | |
198 | settings->pktlen, | |
199 | settings->baudrate, settings->databits, | |
200 | settings->unknown1, settings->unknown2); | |
201 | return rc; | |
202 | } /* klsi_105_chg_port_settings */ | |
203 | ||
204 | /* translate a 16-bit status value from the device to linux's TIO bits */ | |
205 | static unsigned long klsi_105_status2linestate(const __u16 status) | |
206 | { | |
207 | unsigned long res = 0; | |
208 | ||
209 | res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) | |
210 | | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0) | |
211 | ; | |
212 | ||
213 | return res; | |
214 | } | |
215 | /* | |
216 | * Read line control via vendor command and return result through | |
217 | * *line_state_p | |
218 | */ | |
219 | /* It seems that the status buffer has always only 2 bytes length */ | |
220 | #define KLSI_STATUSBUF_LEN 2 | |
221 | static int klsi_105_get_line_state(struct usb_serial_port *port, | |
222 | unsigned long *line_state_p) | |
223 | { | |
224 | int rc; | |
225 | __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1}; | |
226 | __u16 status; | |
227 | ||
228 | info("%s - sending SIO Poll request", __FUNCTION__); | |
229 | rc = usb_control_msg(port->serial->dev, | |
230 | usb_rcvctrlpipe(port->serial->dev, 0), | |
231 | KL5KUSB105A_SIO_POLL, | |
232 | USB_TYPE_VENDOR | USB_DIR_IN, | |
233 | 0, /* value */ | |
234 | 0, /* index */ | |
235 | status_buf, KLSI_STATUSBUF_LEN, | |
236 | 10000 | |
237 | ); | |
238 | if (rc < 0) | |
239 | err("Reading line status failed (error = %d)", rc); | |
240 | else { | |
241 | status = status_buf[0] + (status_buf[1]<<8); | |
242 | ||
243 | info("%s - read status %x %x", __FUNCTION__, | |
244 | status_buf[0], status_buf[1]); | |
245 | ||
246 | *line_state_p = klsi_105_status2linestate(status); | |
247 | } | |
248 | ||
249 | return rc; | |
250 | } | |
251 | ||
252 | ||
253 | /* | |
254 | * Driver's tty interface functions | |
255 | */ | |
256 | ||
257 | static int klsi_105_startup (struct usb_serial *serial) | |
258 | { | |
259 | struct klsi_105_private *priv; | |
260 | int i; | |
261 | ||
262 | /* check if we support the product id (see keyspan.c) | |
263 | * FIXME | |
264 | */ | |
265 | ||
266 | /* allocate the private data structure */ | |
267 | for (i=0; i<serial->num_ports; i++) { | |
268 | int j; | |
269 | priv = kmalloc(sizeof(struct klsi_105_private), | |
270 | GFP_KERNEL); | |
271 | if (!priv) { | |
272 | dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__); | |
273 | return -ENOMEM; | |
274 | } | |
275 | /* set initial values for control structures */ | |
276 | priv->cfg.pktlen = 5; | |
277 | priv->cfg.baudrate = kl5kusb105a_sio_b9600; | |
278 | priv->cfg.databits = kl5kusb105a_dtb_8; | |
279 | priv->cfg.unknown1 = 0; | |
280 | priv->cfg.unknown2 = 1; | |
281 | ||
282 | priv->line_state = 0; | |
283 | ||
284 | priv->bytes_in = 0; | |
285 | priv->bytes_out = 0; | |
286 | usb_set_serial_port_data(serial->port[i], priv); | |
287 | ||
288 | spin_lock_init (&priv->lock); | |
289 | for (j=0; j<NUM_URBS; j++) { | |
290 | struct urb* urb = usb_alloc_urb(0, GFP_KERNEL); | |
291 | ||
292 | priv->write_urb_pool[j] = urb; | |
293 | if (urb == NULL) { | |
294 | err("No more urbs???"); | |
295 | continue; | |
296 | } | |
297 | ||
298 | urb->transfer_buffer = NULL; | |
299 | urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, | |
300 | GFP_KERNEL); | |
301 | if (!urb->transfer_buffer) { | |
302 | err("%s - out of memory for urb buffers.", __FUNCTION__); | |
303 | continue; | |
304 | } | |
305 | } | |
306 | ||
307 | /* priv->termios is left uninitalized until port opening */ | |
308 | init_waitqueue_head(&serial->port[i]->write_wait); | |
309 | } | |
310 | ||
311 | return (0); | |
312 | } /* klsi_105_startup */ | |
313 | ||
314 | ||
315 | static void klsi_105_shutdown (struct usb_serial *serial) | |
316 | { | |
317 | int i; | |
318 | ||
319 | dbg("%s", __FUNCTION__); | |
320 | ||
321 | /* stop reads and writes on all ports */ | |
322 | for (i=0; i < serial->num_ports; ++i) { | |
323 | struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]); | |
324 | unsigned long flags; | |
325 | ||
326 | if (priv) { | |
327 | /* kill our write urb pool */ | |
328 | int j; | |
329 | struct urb **write_urbs = priv->write_urb_pool; | |
330 | spin_lock_irqsave(&priv->lock,flags); | |
331 | ||
332 | for (j = 0; j < NUM_URBS; j++) { | |
333 | if (write_urbs[j]) { | |
334 | /* FIXME - uncomment the following | |
335 | * usb_kill_urb call when the host | |
336 | * controllers get fixed to set | |
337 | * urb->dev = NULL after the urb is | |
338 | * finished. Otherwise this call | |
339 | * oopses. */ | |
340 | /* usb_kill_urb(write_urbs[j]); */ | |
1bc3c9e1 | 341 | kfree(write_urbs[j]->transfer_buffer); |
1da177e4 LT |
342 | usb_free_urb (write_urbs[j]); |
343 | } | |
344 | } | |
345 | ||
346 | spin_unlock_irqrestore (&priv->lock, flags); | |
347 | ||
348 | kfree(priv); | |
349 | usb_set_serial_port_data(serial->port[i], NULL); | |
350 | } | |
351 | } | |
352 | } /* klsi_105_shutdown */ | |
353 | ||
354 | static int klsi_105_open (struct usb_serial_port *port, struct file *filp) | |
355 | { | |
356 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
357 | int retval = 0; | |
358 | int rc; | |
359 | int i; | |
360 | unsigned long line_state; | |
361 | struct klsi_105_port_settings cfg; | |
362 | unsigned long flags; | |
363 | ||
364 | dbg("%s port %d", __FUNCTION__, port->number); | |
365 | ||
366 | /* force low_latency on so that our tty_push actually forces | |
367 | * the data through | |
368 | * port->tty->low_latency = 1; */ | |
369 | ||
370 | /* Do a defined restart: | |
371 | * Set up sane default baud rate and send the 'READ_ON' | |
372 | * vendor command. | |
373 | * FIXME: set modem line control (how?) | |
374 | * Then read the modem line control and store values in | |
375 | * priv->line_state. | |
376 | */ | |
377 | cfg.pktlen = 5; | |
378 | cfg.baudrate = kl5kusb105a_sio_b9600; | |
379 | cfg.databits = kl5kusb105a_dtb_8; | |
380 | cfg.unknown1 = 0; | |
381 | cfg.unknown2 = 1; | |
382 | klsi_105_chg_port_settings(port, &cfg); | |
383 | ||
384 | /* set up termios structure */ | |
385 | spin_lock_irqsave (&priv->lock, flags); | |
386 | priv->termios.c_iflag = port->tty->termios->c_iflag; | |
387 | priv->termios.c_oflag = port->tty->termios->c_oflag; | |
388 | priv->termios.c_cflag = port->tty->termios->c_cflag; | |
389 | priv->termios.c_lflag = port->tty->termios->c_lflag; | |
390 | for (i=0; i<NCCS; i++) | |
391 | priv->termios.c_cc[i] = port->tty->termios->c_cc[i]; | |
392 | priv->cfg.pktlen = cfg.pktlen; | |
393 | priv->cfg.baudrate = cfg.baudrate; | |
394 | priv->cfg.databits = cfg.databits; | |
395 | priv->cfg.unknown1 = cfg.unknown1; | |
396 | priv->cfg.unknown2 = cfg.unknown2; | |
397 | spin_unlock_irqrestore (&priv->lock, flags); | |
398 | ||
399 | /* READ_ON and urb submission */ | |
400 | usb_fill_bulk_urb(port->read_urb, port->serial->dev, | |
401 | usb_rcvbulkpipe(port->serial->dev, | |
402 | port->bulk_in_endpointAddress), | |
403 | port->read_urb->transfer_buffer, | |
404 | port->read_urb->transfer_buffer_length, | |
405 | klsi_105_read_bulk_callback, | |
406 | port); | |
407 | ||
408 | rc = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
409 | if (rc) { | |
410 | err("%s - failed submitting read urb, error %d", __FUNCTION__, rc); | |
411 | retval = rc; | |
412 | goto exit; | |
413 | } | |
414 | ||
415 | rc = usb_control_msg(port->serial->dev, | |
416 | usb_sndctrlpipe(port->serial->dev,0), | |
417 | KL5KUSB105A_SIO_CONFIGURE, | |
418 | USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE, | |
419 | KL5KUSB105A_SIO_CONFIGURE_READ_ON, | |
420 | 0, /* index */ | |
421 | NULL, | |
422 | 0, | |
423 | KLSI_TIMEOUT); | |
424 | if (rc < 0) { | |
425 | err("Enabling read failed (error = %d)", rc); | |
426 | retval = rc; | |
427 | } else | |
428 | dbg("%s - enabled reading", __FUNCTION__); | |
429 | ||
430 | rc = klsi_105_get_line_state(port, &line_state); | |
431 | if (rc >= 0) { | |
432 | spin_lock_irqsave (&priv->lock, flags); | |
433 | priv->line_state = line_state; | |
434 | spin_unlock_irqrestore (&priv->lock, flags); | |
435 | dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); | |
436 | retval = 0; | |
437 | } else | |
438 | retval = rc; | |
439 | ||
440 | exit: | |
441 | return retval; | |
442 | } /* klsi_105_open */ | |
443 | ||
444 | ||
445 | static void klsi_105_close (struct usb_serial_port *port, struct file *filp) | |
446 | { | |
447 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
448 | int rc; | |
449 | ||
450 | dbg("%s port %d", __FUNCTION__, port->number); | |
451 | ||
452 | /* send READ_OFF */ | |
453 | rc = usb_control_msg (port->serial->dev, | |
454 | usb_sndctrlpipe(port->serial->dev, 0), | |
455 | KL5KUSB105A_SIO_CONFIGURE, | |
456 | USB_TYPE_VENDOR | USB_DIR_OUT, | |
457 | KL5KUSB105A_SIO_CONFIGURE_READ_OFF, | |
458 | 0, /* index */ | |
459 | NULL, 0, | |
460 | KLSI_TIMEOUT); | |
461 | if (rc < 0) | |
462 | err("Disabling read failed (error = %d)", rc); | |
463 | ||
464 | /* shutdown our bulk reads and writes */ | |
465 | usb_kill_urb(port->write_urb); | |
466 | usb_kill_urb(port->read_urb); | |
467 | /* unlink our write pool */ | |
468 | /* FIXME */ | |
469 | /* wgg - do I need this? I think so. */ | |
470 | usb_kill_urb(port->interrupt_in_urb); | |
471 | info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out); | |
472 | } /* klsi_105_close */ | |
473 | ||
474 | ||
475 | /* We need to write a complete 64-byte data block and encode the | |
476 | * number actually sent in the first double-byte, LSB-order. That | |
477 | * leaves at most 62 bytes of payload. | |
478 | */ | |
479 | #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */ | |
480 | ||
481 | ||
482 | static int klsi_105_write (struct usb_serial_port *port, | |
483 | const unsigned char *buf, int count) | |
484 | { | |
485 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
486 | int result, size; | |
487 | int bytes_sent=0; | |
488 | ||
489 | dbg("%s - port %d", __FUNCTION__, port->number); | |
490 | ||
491 | while (count > 0) { | |
492 | /* try to find a free urb (write 0 bytes if none) */ | |
493 | struct urb *urb = NULL; | |
494 | unsigned long flags; | |
495 | int i; | |
496 | /* since the pool is per-port we might not need the spin lock !? */ | |
497 | spin_lock_irqsave (&priv->lock, flags); | |
498 | for (i=0; i<NUM_URBS; i++) { | |
499 | if (priv->write_urb_pool[i]->status != -EINPROGRESS) { | |
500 | urb = priv->write_urb_pool[i]; | |
501 | dbg("%s - using pool URB %d", __FUNCTION__, i); | |
502 | break; | |
503 | } | |
504 | } | |
505 | spin_unlock_irqrestore (&priv->lock, flags); | |
506 | ||
507 | if (urb==NULL) { | |
508 | dbg("%s - no more free urbs", __FUNCTION__); | |
509 | goto exit; | |
510 | } | |
511 | ||
512 | if (urb->transfer_buffer == NULL) { | |
513 | urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC); | |
514 | if (urb->transfer_buffer == NULL) { | |
515 | err("%s - no more kernel memory...", __FUNCTION__); | |
516 | goto exit; | |
517 | } | |
518 | } | |
519 | ||
520 | size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET); | |
521 | size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET); | |
522 | ||
523 | memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size); | |
524 | ||
525 | /* write payload size into transfer buffer */ | |
526 | ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF); | |
527 | ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8); | |
528 | ||
529 | /* set up our urb */ | |
530 | usb_fill_bulk_urb(urb, port->serial->dev, | |
531 | usb_sndbulkpipe(port->serial->dev, | |
532 | port->bulk_out_endpointAddress), | |
533 | urb->transfer_buffer, | |
534 | URB_TRANSFER_BUFFER_SIZE, | |
535 | klsi_105_write_bulk_callback, | |
536 | port); | |
537 | ||
538 | /* send the data out the bulk port */ | |
539 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
540 | if (result) { | |
541 | err("%s - failed submitting write urb, error %d", __FUNCTION__, result); | |
542 | goto exit; | |
543 | } | |
544 | buf += size; | |
545 | bytes_sent += size; | |
546 | count -= size; | |
547 | } | |
548 | exit: | |
549 | /* lockless, but it's for debug info only... */ | |
550 | priv->bytes_out+=bytes_sent; | |
551 | ||
552 | return bytes_sent; /* that's how much we wrote */ | |
553 | } /* klsi_105_write */ | |
554 | ||
7d12e780 | 555 | static void klsi_105_write_bulk_callback ( struct urb *urb) |
1da177e4 LT |
556 | { |
557 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
558 | ||
559 | dbg("%s - port %d", __FUNCTION__, port->number); | |
560 | ||
561 | if (urb->status) { | |
562 | dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, | |
563 | urb->status); | |
564 | return; | |
565 | } | |
566 | ||
cf2c7481 | 567 | usb_serial_port_softint(port); |
1da177e4 LT |
568 | } /* klsi_105_write_bulk_completion_callback */ |
569 | ||
570 | ||
571 | /* return number of characters currently in the writing process */ | |
572 | static int klsi_105_chars_in_buffer (struct usb_serial_port *port) | |
573 | { | |
574 | int chars = 0; | |
575 | int i; | |
576 | unsigned long flags; | |
577 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
578 | ||
579 | spin_lock_irqsave (&priv->lock, flags); | |
580 | ||
581 | for (i = 0; i < NUM_URBS; ++i) { | |
582 | if (priv->write_urb_pool[i]->status == -EINPROGRESS) { | |
583 | chars += URB_TRANSFER_BUFFER_SIZE; | |
584 | } | |
585 | } | |
586 | ||
587 | spin_unlock_irqrestore (&priv->lock, flags); | |
588 | ||
589 | dbg("%s - returns %d", __FUNCTION__, chars); | |
590 | return (chars); | |
591 | } | |
592 | ||
593 | static int klsi_105_write_room (struct usb_serial_port *port) | |
594 | { | |
595 | unsigned long flags; | |
596 | int i; | |
597 | int room = 0; | |
598 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
599 | ||
600 | spin_lock_irqsave (&priv->lock, flags); | |
601 | for (i = 0; i < NUM_URBS; ++i) { | |
602 | if (priv->write_urb_pool[i]->status != -EINPROGRESS) { | |
603 | room += URB_TRANSFER_BUFFER_SIZE; | |
604 | } | |
605 | } | |
606 | ||
607 | spin_unlock_irqrestore (&priv->lock, flags); | |
608 | ||
609 | dbg("%s - returns %d", __FUNCTION__, room); | |
610 | return (room); | |
611 | } | |
612 | ||
613 | ||
614 | ||
7d12e780 | 615 | static void klsi_105_read_bulk_callback (struct urb *urb) |
1da177e4 LT |
616 | { |
617 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
618 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
619 | struct tty_struct *tty; | |
620 | unsigned char *data = urb->transfer_buffer; | |
621 | int rc; | |
622 | ||
623 | dbg("%s - port %d", __FUNCTION__, port->number); | |
624 | ||
625 | /* The urb might have been killed. */ | |
626 | if (urb->status) { | |
627 | dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, | |
628 | urb->status); | |
629 | return; | |
630 | } | |
631 | ||
632 | /* The data received is again preceded by a length double-byte in LSB- | |
633 | * first order (see klsi_105_write() ) | |
634 | */ | |
635 | if (urb->actual_length == 0) { | |
636 | /* empty urbs seem to happen, we ignore them */ | |
637 | /* dbg("%s - emtpy URB", __FUNCTION__); */ | |
638 | ; | |
639 | } else if (urb->actual_length <= 2) { | |
640 | dbg("%s - size %d URB not understood", __FUNCTION__, | |
641 | urb->actual_length); | |
642 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, | |
643 | urb->actual_length, data); | |
644 | } else { | |
1da177e4 LT |
645 | int bytes_sent = ((__u8 *) data)[0] + |
646 | ((unsigned int) ((__u8 *) data)[1] << 8); | |
647 | tty = port->tty; | |
648 | /* we should immediately resubmit the URB, before attempting | |
649 | * to pass the data on to the tty layer. But that needs locking | |
650 | * against re-entry an then mixed-up data because of | |
651 | * intermixed tty_flip_buffer_push()s | |
652 | * FIXME | |
653 | */ | |
654 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, | |
655 | urb->actual_length, data); | |
656 | ||
657 | if (bytes_sent + 2 > urb->actual_length) { | |
658 | dbg("%s - trying to read more data than available" | |
659 | " (%d vs. %d)", __FUNCTION__, | |
660 | bytes_sent+2, urb->actual_length); | |
661 | /* cap at implied limit */ | |
662 | bytes_sent = urb->actual_length - 2; | |
663 | } | |
664 | ||
33f0f88f AC |
665 | tty_buffer_request_room(tty, bytes_sent); |
666 | tty_insert_flip_string(tty, data + 2, bytes_sent); | |
1da177e4 LT |
667 | tty_flip_buffer_push(tty); |
668 | ||
669 | /* again lockless, but debug info only */ | |
670 | priv->bytes_in += bytes_sent; | |
671 | } | |
672 | /* Continue trying to always read */ | |
673 | usb_fill_bulk_urb(port->read_urb, port->serial->dev, | |
674 | usb_rcvbulkpipe(port->serial->dev, | |
675 | port->bulk_in_endpointAddress), | |
676 | port->read_urb->transfer_buffer, | |
677 | port->read_urb->transfer_buffer_length, | |
678 | klsi_105_read_bulk_callback, | |
679 | port); | |
680 | rc = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
681 | if (rc) | |
682 | err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc); | |
683 | } /* klsi_105_read_bulk_callback */ | |
684 | ||
685 | ||
686 | static void klsi_105_set_termios (struct usb_serial_port *port, | |
606d099c | 687 | struct ktermios *old_termios) |
1da177e4 LT |
688 | { |
689 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
690 | unsigned int iflag = port->tty->termios->c_iflag; | |
691 | unsigned int old_iflag = old_termios->c_iflag; | |
692 | unsigned int cflag = port->tty->termios->c_cflag; | |
693 | unsigned int old_cflag = old_termios->c_cflag; | |
694 | struct klsi_105_port_settings cfg; | |
695 | unsigned long flags; | |
696 | ||
697 | /* lock while we are modifying the settings */ | |
698 | spin_lock_irqsave (&priv->lock, flags); | |
699 | ||
700 | /* | |
701 | * Update baud rate | |
702 | */ | |
703 | if( (cflag & CBAUD) != (old_cflag & CBAUD) ) { | |
704 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
705 | if( (old_cflag & CBAUD) == B0 ) { | |
706 | dbg("%s: baud was B0", __FUNCTION__); | |
707 | #if 0 | |
708 | priv->control_state |= TIOCM_DTR; | |
709 | /* don't set RTS if using hardware flow control */ | |
710 | if (!(old_cflag & CRTSCTS)) { | |
711 | priv->control_state |= TIOCM_RTS; | |
712 | } | |
713 | mct_u232_set_modem_ctrl(serial, priv->control_state); | |
714 | #endif | |
715 | } | |
716 | ||
717 | switch(cflag & CBAUD) { | |
718 | case B0: /* handled below */ | |
719 | break; | |
720 | case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200; | |
721 | break; | |
722 | case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400; | |
723 | break; | |
724 | case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800; | |
725 | break; | |
726 | case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600; | |
727 | break; | |
728 | case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200; | |
729 | break; | |
730 | case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400; | |
731 | break; | |
732 | case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600; | |
733 | break; | |
734 | case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200; | |
735 | break; | |
736 | default: | |
737 | err("KLSI USB->Serial converter:" | |
738 | " unsupported baudrate request, using default" | |
739 | " of 9600"); | |
740 | priv->cfg.baudrate = kl5kusb105a_sio_b9600; | |
741 | break; | |
742 | } | |
743 | if ((cflag & CBAUD) == B0 ) { | |
744 | dbg("%s: baud is B0", __FUNCTION__); | |
745 | /* Drop RTS and DTR */ | |
746 | /* maybe this should be simulated by sending read | |
747 | * disable and read enable messages? | |
748 | */ | |
749 | ; | |
750 | #if 0 | |
751 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
752 | mct_u232_set_modem_ctrl(serial, priv->control_state); | |
753 | #endif | |
754 | } | |
755 | } | |
756 | ||
757 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { | |
758 | /* set the number of data bits */ | |
759 | switch (cflag & CSIZE) { | |
760 | case CS5: | |
761 | dbg("%s - 5 bits/byte not supported", __FUNCTION__); | |
762 | spin_unlock_irqrestore (&priv->lock, flags); | |
763 | return ; | |
764 | case CS6: | |
765 | dbg("%s - 6 bits/byte not supported", __FUNCTION__); | |
766 | spin_unlock_irqrestore (&priv->lock, flags); | |
767 | return ; | |
768 | case CS7: | |
769 | priv->cfg.databits = kl5kusb105a_dtb_7; | |
770 | break; | |
771 | case CS8: | |
772 | priv->cfg.databits = kl5kusb105a_dtb_8; | |
773 | break; | |
774 | default: | |
775 | err("CSIZE was not CS5-CS8, using default of 8"); | |
776 | priv->cfg.databits = kl5kusb105a_dtb_8; | |
777 | break; | |
778 | } | |
779 | } | |
780 | ||
781 | /* | |
782 | * Update line control register (LCR) | |
783 | */ | |
784 | if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) | |
785 | || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) { | |
786 | ||
787 | #if 0 | |
788 | priv->last_lcr = 0; | |
789 | ||
790 | /* set the parity */ | |
791 | if (cflag & PARENB) | |
792 | priv->last_lcr |= (cflag & PARODD) ? | |
793 | MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; | |
794 | else | |
795 | priv->last_lcr |= MCT_U232_PARITY_NONE; | |
796 | ||
797 | /* set the number of stop bits */ | |
798 | priv->last_lcr |= (cflag & CSTOPB) ? | |
799 | MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; | |
800 | ||
801 | mct_u232_set_line_ctrl(serial, priv->last_lcr); | |
802 | #endif | |
803 | ; | |
804 | } | |
805 | ||
806 | /* | |
807 | * Set flow control: well, I do not really now how to handle DTR/RTS. | |
808 | * Just do what we have seen with SniffUSB on Win98. | |
809 | */ | |
810 | if( (iflag & IXOFF) != (old_iflag & IXOFF) | |
811 | || (iflag & IXON) != (old_iflag & IXON) | |
812 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) { | |
813 | ||
814 | /* Drop DTR/RTS if no flow control otherwise assert */ | |
815 | #if 0 | |
816 | if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) ) | |
817 | priv->control_state |= TIOCM_DTR | TIOCM_RTS; | |
818 | else | |
819 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
820 | mct_u232_set_modem_ctrl(serial, priv->control_state); | |
821 | #endif | |
822 | ; | |
823 | } | |
824 | memcpy (&cfg, &priv->cfg, sizeof(cfg)); | |
825 | spin_unlock_irqrestore (&priv->lock, flags); | |
826 | ||
827 | /* now commit changes to device */ | |
828 | klsi_105_chg_port_settings(port, &cfg); | |
829 | } /* klsi_105_set_termios */ | |
830 | ||
831 | ||
832 | #if 0 | |
833 | static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state ) | |
834 | { | |
835 | struct usb_serial *serial = port->serial; | |
836 | struct mct_u232_private *priv = (struct mct_u232_private *)port->private; | |
837 | unsigned char lcr = priv->last_lcr; | |
838 | ||
839 | dbg("%sstate=%d", __FUNCTION__, break_state); | |
840 | ||
841 | if (break_state) | |
842 | lcr |= MCT_U232_SET_BREAK; | |
843 | ||
844 | mct_u232_set_line_ctrl(serial, lcr); | |
845 | } /* mct_u232_break_ctl */ | |
846 | #endif | |
847 | ||
848 | static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file) | |
849 | { | |
850 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
851 | unsigned long flags; | |
852 | int rc; | |
853 | unsigned long line_state; | |
854 | dbg("%s - request, just guessing", __FUNCTION__); | |
855 | ||
856 | rc = klsi_105_get_line_state(port, &line_state); | |
857 | if (rc < 0) { | |
858 | err("Reading line control failed (error = %d)", rc); | |
859 | /* better return value? EAGAIN? */ | |
860 | return rc; | |
861 | } | |
862 | ||
863 | spin_lock_irqsave (&priv->lock, flags); | |
864 | priv->line_state = line_state; | |
865 | spin_unlock_irqrestore (&priv->lock, flags); | |
866 | dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); | |
867 | return (int)line_state; | |
868 | } | |
869 | ||
870 | static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file, | |
871 | unsigned int set, unsigned int clear) | |
872 | { | |
873 | int retval = -EINVAL; | |
874 | ||
875 | dbg("%s", __FUNCTION__); | |
876 | ||
877 | /* if this ever gets implemented, it should be done something like this: | |
878 | struct usb_serial *serial = port->serial; | |
879 | struct klsi_105_private *priv = usb_get_serial_port_data(port); | |
880 | unsigned long flags; | |
881 | int control; | |
882 | ||
883 | spin_lock_irqsave (&priv->lock, flags); | |
884 | if (set & TIOCM_RTS) | |
885 | priv->control_state |= TIOCM_RTS; | |
886 | if (set & TIOCM_DTR) | |
887 | priv->control_state |= TIOCM_DTR; | |
888 | if (clear & TIOCM_RTS) | |
889 | priv->control_state &= ~TIOCM_RTS; | |
890 | if (clear & TIOCM_DTR) | |
891 | priv->control_state &= ~TIOCM_DTR; | |
892 | control = priv->control_state; | |
893 | spin_unlock_irqrestore (&priv->lock, flags); | |
894 | retval = mct_u232_set_modem_ctrl(serial, control); | |
895 | */ | |
896 | return retval; | |
897 | } | |
1da177e4 LT |
898 | |
899 | static void klsi_105_throttle (struct usb_serial_port *port) | |
900 | { | |
901 | dbg("%s - port %d", __FUNCTION__, port->number); | |
902 | usb_kill_urb(port->read_urb); | |
903 | } | |
904 | ||
905 | static void klsi_105_unthrottle (struct usb_serial_port *port) | |
906 | { | |
907 | int result; | |
908 | ||
909 | dbg("%s - port %d", __FUNCTION__, port->number); | |
910 | ||
911 | port->read_urb->dev = port->serial->dev; | |
912 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
913 | if (result) | |
914 | err("%s - failed submitting read urb, error %d", __FUNCTION__, | |
915 | result); | |
916 | } | |
917 | ||
918 | ||
919 | ||
920 | static int __init klsi_105_init (void) | |
921 | { | |
922 | int retval; | |
923 | retval = usb_serial_register(&kl5kusb105d_device); | |
924 | if (retval) | |
925 | goto failed_usb_serial_register; | |
926 | retval = usb_register(&kl5kusb105d_driver); | |
927 | if (retval) | |
928 | goto failed_usb_register; | |
929 | ||
930 | info(DRIVER_DESC " " DRIVER_VERSION); | |
931 | return 0; | |
932 | failed_usb_register: | |
933 | usb_serial_deregister(&kl5kusb105d_device); | |
934 | failed_usb_serial_register: | |
935 | return retval; | |
936 | } | |
937 | ||
938 | ||
939 | static void __exit klsi_105_exit (void) | |
940 | { | |
941 | usb_deregister (&kl5kusb105d_driver); | |
942 | usb_serial_deregister (&kl5kusb105d_device); | |
943 | } | |
944 | ||
945 | ||
946 | module_init (klsi_105_init); | |
947 | module_exit (klsi_105_exit); | |
948 | ||
949 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
950 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
951 | MODULE_LICENSE("GPL"); | |
952 | ||
953 | ||
954 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
955 | MODULE_PARM_DESC(debug, "enable extensive debugging messages"); | |
956 | ||
957 | /* vim: set sts=8 ts=8 sw=8: */ |