Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * MCT (Magic Control Technology Corp.) USB RS232 Converter Driver | |
3 | * | |
4 | * Copyright (C) 2000 Wolfgang Grandegger (wolfgang@ces.ch) | |
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 | * This program is largely derived from the Belkin USB Serial Adapter Driver | |
12 | * (see belkin_sa.[ch]). All of the information about the device was acquired | |
13 | * by using SniffUSB on Windows98. For technical details see mct_u232.h. | |
14 | * | |
15 | * William G. Greathouse and Greg Kroah-Hartman provided great help on how to | |
16 | * do the reverse engineering and how to write a USB serial device driver. | |
17 | * | |
18 | * TO BE DONE, TO BE CHECKED: | |
19 | * DTR/RTS signal handling may be incomplete or incorrect. I have mainly | |
20 | * implemented what I have seen with SniffUSB or found in belkin_sa.c. | |
21 | * For further TODOs check also belkin_sa.c. | |
22 | * | |
23 | * TEST STATUS: | |
24 | * Basic tests have been performed with minicom/zmodem transfers and | |
25 | * modem dialing under Linux 2.4.0-test10 (for me it works fine). | |
26 | * | |
27 | * 04-Nov-2003 Bill Marr <marr at flex dot com> | |
28 | * - Mimic Windows driver by sending 2 USB 'device request' messages | |
29 | * following normal 'baud rate change' message. This allows data to be | |
30 | * transmitted to RS-232 devices which don't assert the 'CTS' signal. | |
31 | * | |
32 | * 10-Nov-2001 Wolfgang Grandegger | |
33 | * - Fixed an endianess problem with the baudrate selection for PowerPC. | |
34 | * | |
35 | * 06-Dec-2001 Martin Hamilton <martinh@gnu.org> | |
36 | * Added support for the Belkin F5U109 DB9 adaptor | |
37 | * | |
38 | * 30-May-2001 Greg Kroah-Hartman | |
39 | * switched from using spinlock to a semaphore, which fixes lots of problems. | |
40 | * | |
41 | * 04-May-2001 Stelian Pop | |
42 | * - Set the maximum bulk output size for Sitecom U232-P25 model to 16 bytes | |
43 | * instead of the device reported 32 (using 32 bytes causes many data | |
44 | * loss, Windows driver uses 16 too). | |
45 | * | |
46 | * 02-May-2001 Stelian Pop | |
47 | * - Fixed the baud calculation for Sitecom U232-P25 model | |
48 | * | |
49 | * 08-Apr-2001 gb | |
50 | * - Identify version on module load. | |
51 | * | |
52 | * 06-Jan-2001 Cornel Ciocirlan | |
53 | * - Added support for Sitecom U232-P25 model (Product Id 0x0230) | |
54 | * - Added support for D-Link DU-H3SP USB BAY (Product Id 0x0200) | |
55 | * | |
56 | * 29-Nov-2000 Greg Kroah-Hartman | |
57 | * - Added device id table to fit with 2.4.0-test11 structure. | |
58 | * - took out DEAL_WITH_TWO_INT_IN_ENDPOINTS #define as it's not needed | |
59 | * (lots of things will change if/when the usb-serial core changes to | |
60 | * handle these issues. | |
61 | * | |
62 | * 27-Nov-2000 Wolfgang Grandegger | |
63 | * A version for kernel 2.4.0-test10 released to the Linux community | |
64 | * (via linux-usb-devel). | |
65 | */ | |
66 | ||
1da177e4 LT |
67 | #include <linux/kernel.h> |
68 | #include <linux/errno.h> | |
69 | #include <linux/init.h> | |
70 | #include <linux/slab.h> | |
71 | #include <linux/tty.h> | |
72 | #include <linux/tty_driver.h> | |
73 | #include <linux/tty_flip.h> | |
74 | #include <linux/module.h> | |
75 | #include <linux/spinlock.h> | |
76 | #include <asm/uaccess.h> | |
77 | #include <linux/usb.h> | |
a969888c | 78 | #include <linux/usb/serial.h> |
1da177e4 LT |
79 | #include "mct_u232.h" |
80 | ||
81 | /* | |
82 | * Version Information | |
83 | */ | |
45b844df | 84 | #define DRIVER_VERSION "z2.1" /* Linux in-kernel version */ |
1da177e4 LT |
85 | #define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>" |
86 | #define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver" | |
87 | ||
88 | static int debug; | |
89 | ||
90 | /* | |
91 | * Function prototypes | |
92 | */ | |
93 | static int mct_u232_startup (struct usb_serial *serial); | |
94 | static void mct_u232_shutdown (struct usb_serial *serial); | |
95 | static int mct_u232_open (struct usb_serial_port *port, | |
96 | struct file *filp); | |
97 | static void mct_u232_close (struct usb_serial_port *port, | |
98 | struct file *filp); | |
7d12e780 | 99 | static void mct_u232_read_int_callback (struct urb *urb); |
1da177e4 | 100 | static void mct_u232_set_termios (struct usb_serial_port *port, |
606d099c | 101 | struct ktermios * old); |
1da177e4 LT |
102 | static int mct_u232_ioctl (struct usb_serial_port *port, |
103 | struct file * file, | |
104 | unsigned int cmd, | |
105 | unsigned long arg); | |
106 | static void mct_u232_break_ctl (struct usb_serial_port *port, | |
107 | int break_state ); | |
108 | static int mct_u232_tiocmget (struct usb_serial_port *port, | |
109 | struct file *file); | |
110 | static int mct_u232_tiocmset (struct usb_serial_port *port, | |
111 | struct file *file, unsigned int set, | |
112 | unsigned int clear); | |
45b844df DP |
113 | static void mct_u232_throttle (struct usb_serial_port *port); |
114 | static void mct_u232_unthrottle (struct usb_serial_port *port); | |
115 | ||
116 | ||
1da177e4 LT |
117 | /* |
118 | * All of the device info needed for the MCT USB-RS232 converter. | |
119 | */ | |
120 | static struct usb_device_id id_table_combined [] = { | |
121 | { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) }, | |
122 | { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) }, | |
123 | { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) }, | |
124 | { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) }, | |
125 | { } /* Terminating entry */ | |
126 | }; | |
127 | ||
128 | MODULE_DEVICE_TABLE (usb, id_table_combined); | |
129 | ||
130 | static struct usb_driver mct_u232_driver = { | |
1da177e4 LT |
131 | .name = "mct_u232", |
132 | .probe = usb_serial_probe, | |
133 | .disconnect = usb_serial_disconnect, | |
134 | .id_table = id_table_combined, | |
ba9dc657 | 135 | .no_dynamic_id = 1, |
1da177e4 LT |
136 | }; |
137 | ||
ea65370d | 138 | static struct usb_serial_driver mct_u232_device = { |
18fcac35 GKH |
139 | .driver = { |
140 | .owner = THIS_MODULE, | |
269bda1c | 141 | .name = "mct_u232", |
18fcac35 | 142 | }, |
269bda1c | 143 | .description = "MCT U232", |
d9b1b787 | 144 | .usb_driver = &mct_u232_driver, |
1da177e4 LT |
145 | .id_table = id_table_combined, |
146 | .num_interrupt_in = 2, | |
147 | .num_bulk_in = 0, | |
148 | .num_bulk_out = 1, | |
149 | .num_ports = 1, | |
150 | .open = mct_u232_open, | |
151 | .close = mct_u232_close, | |
45b844df DP |
152 | .throttle = mct_u232_throttle, |
153 | .unthrottle = mct_u232_unthrottle, | |
1da177e4 LT |
154 | .read_int_callback = mct_u232_read_int_callback, |
155 | .ioctl = mct_u232_ioctl, | |
156 | .set_termios = mct_u232_set_termios, | |
157 | .break_ctl = mct_u232_break_ctl, | |
158 | .tiocmget = mct_u232_tiocmget, | |
159 | .tiocmset = mct_u232_tiocmset, | |
160 | .attach = mct_u232_startup, | |
161 | .shutdown = mct_u232_shutdown, | |
162 | }; | |
163 | ||
164 | ||
165 | struct mct_u232_private { | |
166 | spinlock_t lock; | |
167 | unsigned int control_state; /* Modem Line Setting (TIOCM) */ | |
168 | unsigned char last_lcr; /* Line Control Register */ | |
169 | unsigned char last_lsr; /* Line Status Register */ | |
170 | unsigned char last_msr; /* Modem Status Register */ | |
45b844df | 171 | unsigned int rx_flags; /* Throttling flags */ |
1da177e4 LT |
172 | }; |
173 | ||
45b844df DP |
174 | #define THROTTLED 0x01 |
175 | ||
1da177e4 LT |
176 | /* |
177 | * Handle vendor specific USB requests | |
178 | */ | |
179 | ||
180 | #define WDR_TIMEOUT 5000 /* default urb timeout */ | |
181 | ||
182 | /* | |
183 | * Later day 2.6.0-test kernels have new baud rates like B230400 which | |
184 | * we do not know how to support. We ignore them for the moment. | |
185 | * XXX Rate-limit the error message, it's user triggerable. | |
186 | */ | |
f4244900 | 187 | static int mct_u232_calculate_baud_rate(struct usb_serial *serial, speed_t value) |
1da177e4 LT |
188 | { |
189 | if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID | |
190 | || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) { | |
191 | switch (value) { | |
f4244900 AC |
192 | case 300: return 0x01; |
193 | case 600: return 0x02; /* this one not tested */ | |
194 | case 1200: return 0x03; | |
195 | case 2400: return 0x04; | |
196 | case 4800: return 0x06; | |
197 | case 9600: return 0x08; | |
198 | case 19200: return 0x09; | |
199 | case 38400: return 0x0a; | |
200 | case 57600: return 0x0b; | |
201 | case 115200: return 0x0c; | |
1da177e4 LT |
202 | default: |
203 | err("MCT USB-RS232: unsupported baudrate request 0x%x," | |
204 | " using default of B9600", value); | |
205 | return 0x08; | |
206 | } | |
207 | } else { | |
208 | switch (value) { | |
b3aceb2b AM |
209 | case 300: break; |
210 | case 600: break; | |
211 | case 1200: break; | |
212 | case 2400: break; | |
213 | case 4800: break; | |
214 | case 9600: break; | |
215 | case 19200: break; | |
216 | case 38400: break; | |
217 | case 57600: break; | |
218 | case 115200: break; | |
219 | default: | |
220 | err("MCT USB-RS232: unsupported baudrate request 0x%x," | |
221 | " using default of B9600", value); | |
222 | value = 9600; | |
1da177e4 LT |
223 | } |
224 | return 115200/value; | |
225 | } | |
226 | } | |
227 | ||
45b844df | 228 | static int mct_u232_set_baud_rate(struct usb_serial *serial, struct usb_serial_port *port, |
f4244900 | 229 | speed_t value) |
1da177e4 LT |
230 | { |
231 | __le32 divisor; | |
232 | int rc; | |
233 | unsigned char zero_byte = 0; | |
45b844df | 234 | unsigned char cts_enable_byte = 0; |
1da177e4 LT |
235 | |
236 | divisor = cpu_to_le32(mct_u232_calculate_baud_rate(serial, value)); | |
237 | ||
238 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
239 | MCT_U232_SET_BAUD_RATE_REQUEST, | |
240 | MCT_U232_SET_REQUEST_TYPE, | |
241 | 0, 0, &divisor, MCT_U232_SET_BAUD_RATE_SIZE, | |
242 | WDR_TIMEOUT); | |
243 | if (rc < 0) | |
244 | err("Set BAUD RATE %d failed (error = %d)", value, rc); | |
245 | dbg("set_baud_rate: value: 0x%x, divisor: 0x%x", value, divisor); | |
246 | ||
247 | /* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which | |
248 | always sends two extra USB 'device request' messages after the | |
249 | 'baud rate change' message. The actual functionality of the | |
250 | request codes in these messages is not fully understood but these | |
251 | particular codes are never seen in any operation besides a baud | |
45b844df DP |
252 | rate change. Both of these messages send a single byte of data. |
253 | In the first message, the value of this byte is always zero. | |
254 | ||
255 | The second message has been determined experimentally to control | |
256 | whether data will be transmitted to a device which is not asserting | |
257 | the 'CTS' signal. If the second message's data byte is zero, data | |
258 | will be transmitted even if 'CTS' is not asserted (i.e. no hardware | |
259 | flow control). if the second message's data byte is nonzero (a value | |
260 | of 1 is used by this driver), data will not be transmitted to a device | |
261 | which is not asserting 'CTS'. | |
262 | */ | |
1da177e4 LT |
263 | |
264 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
265 | MCT_U232_SET_UNKNOWN1_REQUEST, | |
266 | MCT_U232_SET_REQUEST_TYPE, | |
267 | 0, 0, &zero_byte, MCT_U232_SET_UNKNOWN1_SIZE, | |
268 | WDR_TIMEOUT); | |
269 | if (rc < 0) | |
270 | err("Sending USB device request code %d failed (error = %d)", | |
271 | MCT_U232_SET_UNKNOWN1_REQUEST, rc); | |
272 | ||
45b844df DP |
273 | if (port && C_CRTSCTS(port->tty)) { |
274 | cts_enable_byte = 1; | |
275 | } | |
276 | ||
277 | dbg("set_baud_rate: send second control message, data = %02X", cts_enable_byte); | |
1da177e4 | 278 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
45b844df | 279 | MCT_U232_SET_CTS_REQUEST, |
1da177e4 | 280 | MCT_U232_SET_REQUEST_TYPE, |
45b844df | 281 | 0, 0, &cts_enable_byte, MCT_U232_SET_CTS_SIZE, |
1da177e4 LT |
282 | WDR_TIMEOUT); |
283 | if (rc < 0) | |
45b844df DP |
284 | err("Sending USB device request code %d failed (error = %d)", |
285 | MCT_U232_SET_CTS_REQUEST, rc); | |
1da177e4 LT |
286 | |
287 | return rc; | |
288 | } /* mct_u232_set_baud_rate */ | |
289 | ||
290 | static int mct_u232_set_line_ctrl(struct usb_serial *serial, unsigned char lcr) | |
291 | { | |
292 | int rc; | |
293 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
294 | MCT_U232_SET_LINE_CTRL_REQUEST, | |
295 | MCT_U232_SET_REQUEST_TYPE, | |
296 | 0, 0, &lcr, MCT_U232_SET_LINE_CTRL_SIZE, | |
297 | WDR_TIMEOUT); | |
298 | if (rc < 0) | |
299 | err("Set LINE CTRL 0x%x failed (error = %d)", lcr, rc); | |
300 | dbg("set_line_ctrl: 0x%x", lcr); | |
301 | return rc; | |
302 | } /* mct_u232_set_line_ctrl */ | |
303 | ||
304 | static int mct_u232_set_modem_ctrl(struct usb_serial *serial, | |
305 | unsigned int control_state) | |
306 | { | |
307 | int rc; | |
308 | unsigned char mcr = MCT_U232_MCR_NONE; | |
309 | ||
310 | if (control_state & TIOCM_DTR) | |
311 | mcr |= MCT_U232_MCR_DTR; | |
312 | if (control_state & TIOCM_RTS) | |
313 | mcr |= MCT_U232_MCR_RTS; | |
314 | ||
315 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
316 | MCT_U232_SET_MODEM_CTRL_REQUEST, | |
317 | MCT_U232_SET_REQUEST_TYPE, | |
318 | 0, 0, &mcr, MCT_U232_SET_MODEM_CTRL_SIZE, | |
319 | WDR_TIMEOUT); | |
320 | if (rc < 0) | |
321 | err("Set MODEM CTRL 0x%x failed (error = %d)", mcr, rc); | |
322 | dbg("set_modem_ctrl: state=0x%x ==> mcr=0x%x", control_state, mcr); | |
323 | ||
324 | return rc; | |
325 | } /* mct_u232_set_modem_ctrl */ | |
326 | ||
327 | static int mct_u232_get_modem_stat(struct usb_serial *serial, unsigned char *msr) | |
328 | { | |
329 | int rc; | |
330 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
331 | MCT_U232_GET_MODEM_STAT_REQUEST, | |
332 | MCT_U232_GET_REQUEST_TYPE, | |
333 | 0, 0, msr, MCT_U232_GET_MODEM_STAT_SIZE, | |
334 | WDR_TIMEOUT); | |
335 | if (rc < 0) { | |
336 | err("Get MODEM STATus failed (error = %d)", rc); | |
337 | *msr = 0; | |
338 | } | |
339 | dbg("get_modem_stat: 0x%x", *msr); | |
340 | return rc; | |
341 | } /* mct_u232_get_modem_stat */ | |
342 | ||
343 | static void mct_u232_msr_to_state(unsigned int *control_state, unsigned char msr) | |
344 | { | |
345 | /* Translate Control Line states */ | |
346 | if (msr & MCT_U232_MSR_DSR) | |
347 | *control_state |= TIOCM_DSR; | |
348 | else | |
349 | *control_state &= ~TIOCM_DSR; | |
350 | if (msr & MCT_U232_MSR_CTS) | |
351 | *control_state |= TIOCM_CTS; | |
352 | else | |
353 | *control_state &= ~TIOCM_CTS; | |
354 | if (msr & MCT_U232_MSR_RI) | |
355 | *control_state |= TIOCM_RI; | |
356 | else | |
357 | *control_state &= ~TIOCM_RI; | |
358 | if (msr & MCT_U232_MSR_CD) | |
359 | *control_state |= TIOCM_CD; | |
360 | else | |
361 | *control_state &= ~TIOCM_CD; | |
362 | dbg("msr_to_state: msr=0x%x ==> state=0x%x", msr, *control_state); | |
363 | } /* mct_u232_msr_to_state */ | |
364 | ||
365 | /* | |
366 | * Driver's tty interface functions | |
367 | */ | |
368 | ||
369 | static int mct_u232_startup (struct usb_serial *serial) | |
370 | { | |
371 | struct mct_u232_private *priv; | |
372 | struct usb_serial_port *port, *rport; | |
373 | ||
80b6ca48 | 374 | priv = kzalloc(sizeof(struct mct_u232_private), GFP_KERNEL); |
1da177e4 LT |
375 | if (!priv) |
376 | return -ENOMEM; | |
1da177e4 LT |
377 | spin_lock_init(&priv->lock); |
378 | usb_set_serial_port_data(serial->port[0], priv); | |
379 | ||
380 | init_waitqueue_head(&serial->port[0]->write_wait); | |
381 | ||
382 | /* Puh, that's dirty */ | |
383 | port = serial->port[0]; | |
384 | rport = serial->port[1]; | |
73135bb9 MK |
385 | /* No unlinking, it wasn't submitted yet. */ |
386 | usb_free_urb(port->read_urb); | |
1da177e4 LT |
387 | port->read_urb = rport->interrupt_in_urb; |
388 | rport->interrupt_in_urb = NULL; | |
389 | port->read_urb->context = port; | |
390 | ||
391 | return (0); | |
392 | } /* mct_u232_startup */ | |
393 | ||
394 | ||
395 | static void mct_u232_shutdown (struct usb_serial *serial) | |
396 | { | |
397 | struct mct_u232_private *priv; | |
398 | int i; | |
399 | ||
400 | dbg("%s", __FUNCTION__); | |
401 | ||
402 | for (i=0; i < serial->num_ports; ++i) { | |
403 | /* My special items, the standard routines free my urbs */ | |
404 | priv = usb_get_serial_port_data(serial->port[i]); | |
405 | if (priv) { | |
406 | usb_set_serial_port_data(serial->port[i], NULL); | |
407 | kfree(priv); | |
408 | } | |
409 | } | |
410 | } /* mct_u232_shutdown */ | |
411 | ||
412 | static int mct_u232_open (struct usb_serial_port *port, struct file *filp) | |
413 | { | |
414 | struct usb_serial *serial = port->serial; | |
415 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
416 | int retval = 0; | |
417 | unsigned int control_state; | |
418 | unsigned long flags; | |
419 | unsigned char last_lcr; | |
420 | unsigned char last_msr; | |
421 | ||
422 | dbg("%s port %d", __FUNCTION__, port->number); | |
423 | ||
424 | /* Compensate for a hardware bug: although the Sitecom U232-P25 | |
425 | * device reports a maximum output packet size of 32 bytes, | |
426 | * it seems to be able to accept only 16 bytes (and that's what | |
427 | * SniffUSB says too...) | |
428 | */ | |
429 | if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID) | |
430 | port->bulk_out_size = 16; | |
431 | ||
432 | /* Do a defined restart: the normal serial device seems to | |
433 | * always turn on DTR and RTS here, so do the same. I'm not | |
434 | * sure if this is really necessary. But it should not harm | |
435 | * either. | |
436 | */ | |
437 | spin_lock_irqsave(&priv->lock, flags); | |
438 | if (port->tty->termios->c_cflag & CBAUD) | |
439 | priv->control_state = TIOCM_DTR | TIOCM_RTS; | |
440 | else | |
441 | priv->control_state = 0; | |
442 | ||
443 | priv->last_lcr = (MCT_U232_DATA_BITS_8 | | |
444 | MCT_U232_PARITY_NONE | | |
445 | MCT_U232_STOP_BITS_1); | |
446 | control_state = priv->control_state; | |
447 | last_lcr = priv->last_lcr; | |
448 | spin_unlock_irqrestore(&priv->lock, flags); | |
449 | mct_u232_set_modem_ctrl(serial, control_state); | |
450 | mct_u232_set_line_ctrl(serial, last_lcr); | |
451 | ||
452 | /* Read modem status and update control state */ | |
453 | mct_u232_get_modem_stat(serial, &last_msr); | |
454 | spin_lock_irqsave(&priv->lock, flags); | |
455 | priv->last_msr = last_msr; | |
456 | mct_u232_msr_to_state(&priv->control_state, priv->last_msr); | |
457 | spin_unlock_irqrestore(&priv->lock, flags); | |
458 | ||
459 | port->read_urb->dev = port->serial->dev; | |
460 | retval = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
461 | if (retval) { | |
462 | err("usb_submit_urb(read bulk) failed pipe 0x%x err %d", | |
463 | port->read_urb->pipe, retval); | |
2f007de2 | 464 | goto error; |
1da177e4 LT |
465 | } |
466 | ||
467 | port->interrupt_in_urb->dev = port->serial->dev; | |
468 | retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
2f007de2 ON |
469 | if (retval) { |
470 | usb_kill_urb(port->read_urb); | |
1da177e4 LT |
471 | err(" usb_submit_urb(read int) failed pipe 0x%x err %d", |
472 | port->interrupt_in_urb->pipe, retval); | |
2f007de2 ON |
473 | goto error; |
474 | } | |
1da177e4 | 475 | return 0; |
2f007de2 ON |
476 | |
477 | error: | |
478 | return retval; | |
1da177e4 LT |
479 | } /* mct_u232_open */ |
480 | ||
481 | ||
482 | static void mct_u232_close (struct usb_serial_port *port, struct file *filp) | |
483 | { | |
45b844df DP |
484 | unsigned int c_cflag; |
485 | unsigned long flags; | |
486 | unsigned int control_state; | |
487 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
1da177e4 LT |
488 | dbg("%s port %d", __FUNCTION__, port->number); |
489 | ||
45b844df DP |
490 | if (port->tty) { |
491 | c_cflag = port->tty->termios->c_cflag; | |
492 | if (c_cflag & HUPCL) { | |
493 | /* drop DTR and RTS */ | |
494 | spin_lock_irqsave(&priv->lock, flags); | |
495 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
496 | control_state = priv->control_state; | |
497 | spin_unlock_irqrestore(&priv->lock, flags); | |
498 | mct_u232_set_modem_ctrl(port->serial, control_state); | |
499 | } | |
500 | } | |
501 | ||
502 | ||
1da177e4 LT |
503 | if (port->serial->dev) { |
504 | /* shutdown our urbs */ | |
505 | usb_kill_urb(port->write_urb); | |
506 | usb_kill_urb(port->read_urb); | |
507 | usb_kill_urb(port->interrupt_in_urb); | |
508 | } | |
509 | } /* mct_u232_close */ | |
510 | ||
511 | ||
7d12e780 | 512 | static void mct_u232_read_int_callback (struct urb *urb) |
1da177e4 LT |
513 | { |
514 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
515 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
516 | struct usb_serial *serial = port->serial; | |
517 | struct tty_struct *tty; | |
518 | unsigned char *data = urb->transfer_buffer; | |
e96da398 GKH |
519 | int retval; |
520 | int status = urb->status; | |
1da177e4 LT |
521 | unsigned long flags; |
522 | ||
e96da398 | 523 | switch (status) { |
1da177e4 LT |
524 | case 0: |
525 | /* success */ | |
526 | break; | |
527 | case -ECONNRESET: | |
528 | case -ENOENT: | |
529 | case -ESHUTDOWN: | |
530 | /* this urb is terminated, clean up */ | |
e96da398 GKH |
531 | dbg("%s - urb shutting down with status: %d", |
532 | __FUNCTION__, status); | |
1da177e4 LT |
533 | return; |
534 | default: | |
e96da398 GKH |
535 | dbg("%s - nonzero urb status received: %d", |
536 | __FUNCTION__, status); | |
1da177e4 LT |
537 | goto exit; |
538 | } | |
539 | ||
540 | if (!serial) { | |
541 | dbg("%s - bad serial pointer, exiting", __FUNCTION__); | |
542 | return; | |
543 | } | |
544 | ||
545 | dbg("%s - port %d", __FUNCTION__, port->number); | |
546 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); | |
547 | ||
548 | /* | |
549 | * Work-a-round: handle the 'usual' bulk-in pipe here | |
550 | */ | |
551 | if (urb->transfer_buffer_length > 2) { | |
552 | int i; | |
553 | tty = port->tty; | |
554 | if (urb->actual_length) { | |
555 | for (i = 0; i < urb->actual_length ; ++i) { | |
556 | tty_insert_flip_char(tty, data[i], 0); | |
557 | } | |
558 | tty_flip_buffer_push(tty); | |
559 | } | |
560 | goto exit; | |
561 | } | |
562 | ||
563 | /* | |
564 | * The interrupt-in pipe signals exceptional conditions (modem line | |
565 | * signal changes and errors). data[0] holds MSR, data[1] holds LSR. | |
566 | */ | |
567 | spin_lock_irqsave(&priv->lock, flags); | |
568 | priv->last_msr = data[MCT_U232_MSR_INDEX]; | |
569 | ||
570 | /* Record Control Line states */ | |
571 | mct_u232_msr_to_state(&priv->control_state, priv->last_msr); | |
572 | ||
573 | #if 0 | |
574 | /* Not yet handled. See belin_sa.c for further information */ | |
575 | /* Now to report any errors */ | |
576 | priv->last_lsr = data[MCT_U232_LSR_INDEX]; | |
577 | /* | |
578 | * fill in the flip buffer here, but I do not know the relation | |
579 | * to the current/next receive buffer or characters. I need | |
580 | * to look in to this before committing any code. | |
581 | */ | |
582 | if (priv->last_lsr & MCT_U232_LSR_ERR) { | |
583 | tty = port->tty; | |
584 | /* Overrun Error */ | |
585 | if (priv->last_lsr & MCT_U232_LSR_OE) { | |
586 | } | |
587 | /* Parity Error */ | |
588 | if (priv->last_lsr & MCT_U232_LSR_PE) { | |
589 | } | |
590 | /* Framing Error */ | |
591 | if (priv->last_lsr & MCT_U232_LSR_FE) { | |
592 | } | |
593 | /* Break Indicator */ | |
594 | if (priv->last_lsr & MCT_U232_LSR_BI) { | |
595 | } | |
596 | } | |
597 | #endif | |
598 | spin_unlock_irqrestore(&priv->lock, flags); | |
599 | exit: | |
e96da398 GKH |
600 | retval = usb_submit_urb (urb, GFP_ATOMIC); |
601 | if (retval) | |
1da177e4 | 602 | err ("%s - usb_submit_urb failed with result %d", |
e96da398 | 603 | __FUNCTION__, retval); |
1da177e4 LT |
604 | } /* mct_u232_read_int_callback */ |
605 | ||
606 | static void mct_u232_set_termios (struct usb_serial_port *port, | |
606d099c | 607 | struct ktermios *old_termios) |
1da177e4 LT |
608 | { |
609 | struct usb_serial *serial = port->serial; | |
610 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
1da177e4 LT |
611 | unsigned int cflag = port->tty->termios->c_cflag; |
612 | unsigned int old_cflag = old_termios->c_cflag; | |
613 | unsigned long flags; | |
45b844df | 614 | unsigned int control_state; |
1da177e4 LT |
615 | unsigned char last_lcr; |
616 | ||
617 | /* get a local copy of the current port settings */ | |
618 | spin_lock_irqsave(&priv->lock, flags); | |
619 | control_state = priv->control_state; | |
620 | spin_unlock_irqrestore(&priv->lock, flags); | |
621 | last_lcr = 0; | |
622 | ||
623 | /* | |
624 | * Update baud rate. | |
625 | * Do not attempt to cache old rates and skip settings, | |
626 | * disconnects screw such tricks up completely. | |
627 | * Premature optimization is the root of all evil. | |
628 | */ | |
629 | ||
45b844df | 630 | /* reassert DTR and RTS on transition from B0 */ |
1da177e4 LT |
631 | if ((old_cflag & CBAUD) == B0) { |
632 | dbg("%s: baud was B0", __FUNCTION__); | |
45b844df | 633 | control_state |= TIOCM_DTR | TIOCM_RTS; |
1da177e4 LT |
634 | mct_u232_set_modem_ctrl(serial, control_state); |
635 | } | |
636 | ||
f4244900 | 637 | mct_u232_set_baud_rate(serial, port, tty_get_baud_rate(port->tty)); |
1da177e4 LT |
638 | |
639 | if ((cflag & CBAUD) == B0 ) { | |
640 | dbg("%s: baud is B0", __FUNCTION__); | |
641 | /* Drop RTS and DTR */ | |
642 | control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
643 | mct_u232_set_modem_ctrl(serial, control_state); | |
644 | } | |
645 | ||
646 | /* | |
647 | * Update line control register (LCR) | |
648 | */ | |
649 | ||
650 | /* set the parity */ | |
651 | if (cflag & PARENB) | |
652 | last_lcr |= (cflag & PARODD) ? | |
653 | MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; | |
654 | else | |
655 | last_lcr |= MCT_U232_PARITY_NONE; | |
656 | ||
657 | /* set the number of data bits */ | |
658 | switch (cflag & CSIZE) { | |
659 | case CS5: | |
660 | last_lcr |= MCT_U232_DATA_BITS_5; break; | |
661 | case CS6: | |
662 | last_lcr |= MCT_U232_DATA_BITS_6; break; | |
663 | case CS7: | |
664 | last_lcr |= MCT_U232_DATA_BITS_7; break; | |
665 | case CS8: | |
666 | last_lcr |= MCT_U232_DATA_BITS_8; break; | |
667 | default: | |
668 | err("CSIZE was not CS5-CS8, using default of 8"); | |
669 | last_lcr |= MCT_U232_DATA_BITS_8; | |
670 | break; | |
671 | } | |
672 | ||
673 | /* set the number of stop bits */ | |
674 | last_lcr |= (cflag & CSTOPB) ? | |
675 | MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; | |
676 | ||
677 | mct_u232_set_line_ctrl(serial, last_lcr); | |
678 | ||
1da177e4 LT |
679 | /* save off the modified port settings */ |
680 | spin_lock_irqsave(&priv->lock, flags); | |
681 | priv->control_state = control_state; | |
682 | priv->last_lcr = last_lcr; | |
683 | spin_unlock_irqrestore(&priv->lock, flags); | |
684 | } /* mct_u232_set_termios */ | |
685 | ||
686 | static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state ) | |
687 | { | |
688 | struct usb_serial *serial = port->serial; | |
689 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
690 | unsigned char lcr; | |
691 | unsigned long flags; | |
692 | ||
693 | dbg("%sstate=%d", __FUNCTION__, break_state); | |
694 | ||
695 | spin_lock_irqsave(&priv->lock, flags); | |
696 | lcr = priv->last_lcr; | |
697 | spin_unlock_irqrestore(&priv->lock, flags); | |
698 | ||
699 | if (break_state) | |
700 | lcr |= MCT_U232_SET_BREAK; | |
701 | ||
702 | mct_u232_set_line_ctrl(serial, lcr); | |
703 | } /* mct_u232_break_ctl */ | |
704 | ||
705 | ||
706 | static int mct_u232_tiocmget (struct usb_serial_port *port, struct file *file) | |
707 | { | |
708 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
709 | unsigned int control_state; | |
710 | unsigned long flags; | |
711 | ||
712 | dbg("%s", __FUNCTION__); | |
713 | ||
714 | spin_lock_irqsave(&priv->lock, flags); | |
715 | control_state = priv->control_state; | |
716 | spin_unlock_irqrestore(&priv->lock, flags); | |
717 | ||
718 | return control_state; | |
719 | } | |
720 | ||
721 | static int mct_u232_tiocmset (struct usb_serial_port *port, struct file *file, | |
722 | unsigned int set, unsigned int clear) | |
723 | { | |
724 | struct usb_serial *serial = port->serial; | |
725 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
726 | unsigned int control_state; | |
727 | unsigned long flags; | |
728 | ||
729 | dbg("%s", __FUNCTION__); | |
730 | ||
731 | spin_lock_irqsave(&priv->lock, flags); | |
732 | control_state = priv->control_state; | |
733 | ||
734 | if (set & TIOCM_RTS) | |
735 | control_state |= TIOCM_RTS; | |
736 | if (set & TIOCM_DTR) | |
737 | control_state |= TIOCM_DTR; | |
738 | if (clear & TIOCM_RTS) | |
739 | control_state &= ~TIOCM_RTS; | |
740 | if (clear & TIOCM_DTR) | |
741 | control_state &= ~TIOCM_DTR; | |
742 | ||
743 | priv->control_state = control_state; | |
744 | spin_unlock_irqrestore(&priv->lock, flags); | |
745 | return mct_u232_set_modem_ctrl(serial, control_state); | |
746 | } | |
747 | ||
748 | static int mct_u232_ioctl (struct usb_serial_port *port, struct file * file, | |
749 | unsigned int cmd, unsigned long arg) | |
750 | { | |
751 | dbg("%scmd=0x%x", __FUNCTION__, cmd); | |
752 | ||
753 | /* Based on code from acm.c and others */ | |
754 | switch (cmd) { | |
755 | case TIOCMIWAIT: | |
756 | /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/ | |
757 | /* TODO */ | |
758 | return( 0 ); | |
759 | ||
760 | case TIOCGICOUNT: | |
761 | /* return count of modemline transitions */ | |
762 | /* TODO */ | |
763 | return 0; | |
764 | ||
765 | default: | |
766 | dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd); | |
767 | return(-ENOIOCTLCMD); | |
768 | break; | |
769 | } | |
770 | return 0; | |
771 | } /* mct_u232_ioctl */ | |
772 | ||
45b844df DP |
773 | static void mct_u232_throttle (struct usb_serial_port *port) |
774 | { | |
775 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
776 | unsigned long flags; | |
777 | unsigned int control_state; | |
778 | struct tty_struct *tty; | |
779 | ||
780 | tty = port->tty; | |
781 | dbg("%s - port %d", __FUNCTION__, port->number); | |
782 | ||
783 | spin_lock_irqsave(&priv->lock, flags); | |
784 | priv->rx_flags |= THROTTLED; | |
785 | if (C_CRTSCTS(tty)) { | |
786 | priv->control_state &= ~TIOCM_RTS; | |
787 | control_state = priv->control_state; | |
788 | spin_unlock_irqrestore(&priv->lock, flags); | |
789 | (void) mct_u232_set_modem_ctrl(port->serial, control_state); | |
790 | } else { | |
791 | spin_unlock_irqrestore(&priv->lock, flags); | |
792 | } | |
793 | } | |
794 | ||
795 | ||
796 | static void mct_u232_unthrottle (struct usb_serial_port *port) | |
797 | { | |
798 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
799 | unsigned long flags; | |
800 | unsigned int control_state; | |
801 | struct tty_struct *tty; | |
802 | ||
803 | dbg("%s - port %d", __FUNCTION__, port->number); | |
804 | ||
805 | tty = port->tty; | |
806 | spin_lock_irqsave(&priv->lock, flags); | |
807 | if ((priv->rx_flags & THROTTLED) && C_CRTSCTS(tty)) { | |
808 | priv->rx_flags &= ~THROTTLED; | |
809 | priv->control_state |= TIOCM_RTS; | |
810 | control_state = priv->control_state; | |
811 | spin_unlock_irqrestore(&priv->lock, flags); | |
812 | (void) mct_u232_set_modem_ctrl(port->serial, control_state); | |
813 | } else { | |
814 | spin_unlock_irqrestore(&priv->lock, flags); | |
815 | } | |
816 | } | |
1da177e4 LT |
817 | |
818 | static int __init mct_u232_init (void) | |
819 | { | |
820 | int retval; | |
821 | retval = usb_serial_register(&mct_u232_device); | |
822 | if (retval) | |
823 | goto failed_usb_serial_register; | |
824 | retval = usb_register(&mct_u232_driver); | |
825 | if (retval) | |
826 | goto failed_usb_register; | |
827 | info(DRIVER_DESC " " DRIVER_VERSION); | |
828 | return 0; | |
829 | failed_usb_register: | |
830 | usb_serial_deregister(&mct_u232_device); | |
831 | failed_usb_serial_register: | |
832 | return retval; | |
833 | } | |
834 | ||
835 | ||
836 | static void __exit mct_u232_exit (void) | |
837 | { | |
838 | usb_deregister (&mct_u232_driver); | |
839 | usb_serial_deregister (&mct_u232_device); | |
840 | } | |
841 | ||
842 | ||
843 | module_init (mct_u232_init); | |
844 | module_exit(mct_u232_exit); | |
845 | ||
846 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
847 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
848 | MODULE_LICENSE("GPL"); | |
849 | ||
850 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
851 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |