Commit | Line | Data |
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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> | |
e19b2560 | 36 | * - Added support for the Belkin F5U109 DB9 adaptor |
1da177e4 LT |
37 | * |
38 | * 30-May-2001 Greg Kroah-Hartman | |
e19b2560 AC |
39 | * - switched from using spinlock to a semaphore, which fixes lots of |
40 | * problems. | |
1da177e4 LT |
41 | * |
42 | * 04-May-2001 Stelian Pop | |
43 | * - Set the maximum bulk output size for Sitecom U232-P25 model to 16 bytes | |
44 | * instead of the device reported 32 (using 32 bytes causes many data | |
45 | * loss, Windows driver uses 16 too). | |
46 | * | |
47 | * 02-May-2001 Stelian Pop | |
48 | * - Fixed the baud calculation for Sitecom U232-P25 model | |
49 | * | |
50 | * 08-Apr-2001 gb | |
51 | * - Identify version on module load. | |
52 | * | |
e19b2560 | 53 | * 06-Jan-2001 Cornel Ciocirlan |
1da177e4 LT |
54 | * - Added support for Sitecom U232-P25 model (Product Id 0x0230) |
55 | * - Added support for D-Link DU-H3SP USB BAY (Product Id 0x0200) | |
56 | * | |
57 | * 29-Nov-2000 Greg Kroah-Hartman | |
58 | * - Added device id table to fit with 2.4.0-test11 structure. | |
59 | * - took out DEAL_WITH_TWO_INT_IN_ENDPOINTS #define as it's not needed | |
60 | * (lots of things will change if/when the usb-serial core changes to | |
61 | * handle these issues. | |
62 | * | |
e19b2560 AC |
63 | * 27-Nov-2000 Wolfgang Grandegge |
64 | * A version for kernel 2.4.0-test10 released to the Linux community | |
1da177e4 LT |
65 | * (via linux-usb-devel). |
66 | */ | |
67 | ||
1da177e4 LT |
68 | #include <linux/kernel.h> |
69 | #include <linux/errno.h> | |
70 | #include <linux/init.h> | |
71 | #include <linux/slab.h> | |
72 | #include <linux/tty.h> | |
73 | #include <linux/tty_driver.h> | |
74 | #include <linux/tty_flip.h> | |
75 | #include <linux/module.h> | |
76 | #include <linux/spinlock.h> | |
e19b2560 | 77 | #include <linux/uaccess.h> |
1da177e4 | 78 | #include <linux/usb.h> |
a969888c | 79 | #include <linux/usb/serial.h> |
1da177e4 LT |
80 | #include "mct_u232.h" |
81 | ||
82 | /* | |
83 | * Version Information | |
84 | */ | |
45b844df | 85 | #define DRIVER_VERSION "z2.1" /* Linux in-kernel version */ |
1da177e4 LT |
86 | #define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>" |
87 | #define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver" | |
88 | ||
89 | static int debug; | |
90 | ||
91 | /* | |
92 | * Function prototypes | |
93 | */ | |
e19b2560 AC |
94 | static int mct_u232_startup(struct usb_serial *serial); |
95 | static void mct_u232_shutdown(struct usb_serial *serial); | |
96 | static int mct_u232_open(struct tty_struct *tty, | |
97 | struct usb_serial_port *port, struct file *filp); | |
98 | static void mct_u232_close(struct tty_struct *tty, | |
99 | struct usb_serial_port *port, struct file *filp); | |
100 | static void mct_u232_read_int_callback(struct urb *urb); | |
101 | static void mct_u232_set_termios(struct tty_struct *tty, | |
102 | struct usb_serial_port *port, struct ktermios *old); | |
103 | static void mct_u232_break_ctl(struct tty_struct *tty, int break_state); | |
104 | static int mct_u232_tiocmget(struct tty_struct *tty, struct file *file); | |
105 | static int mct_u232_tiocmset(struct tty_struct *tty, struct file *file, | |
106 | unsigned int set, unsigned int clear); | |
107 | static void mct_u232_throttle(struct tty_struct *tty); | |
108 | static void mct_u232_unthrottle(struct tty_struct *tty); | |
45b844df DP |
109 | |
110 | ||
1da177e4 LT |
111 | /* |
112 | * All of the device info needed for the MCT USB-RS232 converter. | |
113 | */ | |
114 | static struct usb_device_id id_table_combined [] = { | |
115 | { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) }, | |
116 | { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) }, | |
117 | { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) }, | |
118 | { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) }, | |
119 | { } /* Terminating entry */ | |
120 | }; | |
121 | ||
e19b2560 | 122 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
123 | |
124 | static struct usb_driver mct_u232_driver = { | |
1da177e4 LT |
125 | .name = "mct_u232", |
126 | .probe = usb_serial_probe, | |
127 | .disconnect = usb_serial_disconnect, | |
128 | .id_table = id_table_combined, | |
ba9dc657 | 129 | .no_dynamic_id = 1, |
1da177e4 LT |
130 | }; |
131 | ||
ea65370d | 132 | static struct usb_serial_driver mct_u232_device = { |
18fcac35 GKH |
133 | .driver = { |
134 | .owner = THIS_MODULE, | |
269bda1c | 135 | .name = "mct_u232", |
18fcac35 | 136 | }, |
269bda1c | 137 | .description = "MCT U232", |
d9b1b787 | 138 | .usb_driver = &mct_u232_driver, |
1da177e4 | 139 | .id_table = id_table_combined, |
1da177e4 LT |
140 | .num_ports = 1, |
141 | .open = mct_u232_open, | |
142 | .close = mct_u232_close, | |
45b844df DP |
143 | .throttle = mct_u232_throttle, |
144 | .unthrottle = mct_u232_unthrottle, | |
1da177e4 | 145 | .read_int_callback = mct_u232_read_int_callback, |
1da177e4 LT |
146 | .set_termios = mct_u232_set_termios, |
147 | .break_ctl = mct_u232_break_ctl, | |
148 | .tiocmget = mct_u232_tiocmget, | |
149 | .tiocmset = mct_u232_tiocmset, | |
150 | .attach = mct_u232_startup, | |
151 | .shutdown = mct_u232_shutdown, | |
152 | }; | |
153 | ||
154 | ||
155 | struct mct_u232_private { | |
156 | spinlock_t lock; | |
157 | unsigned int control_state; /* Modem Line Setting (TIOCM) */ | |
158 | unsigned char last_lcr; /* Line Control Register */ | |
159 | unsigned char last_lsr; /* Line Status Register */ | |
160 | unsigned char last_msr; /* Modem Status Register */ | |
45b844df | 161 | unsigned int rx_flags; /* Throttling flags */ |
1da177e4 LT |
162 | }; |
163 | ||
45b844df DP |
164 | #define THROTTLED 0x01 |
165 | ||
1da177e4 LT |
166 | /* |
167 | * Handle vendor specific USB requests | |
168 | */ | |
169 | ||
170 | #define WDR_TIMEOUT 5000 /* default urb timeout */ | |
171 | ||
172 | /* | |
173 | * Later day 2.6.0-test kernels have new baud rates like B230400 which | |
174 | * we do not know how to support. We ignore them for the moment. | |
1da177e4 | 175 | */ |
e19b2560 AC |
176 | static int mct_u232_calculate_baud_rate(struct usb_serial *serial, |
177 | speed_t value, speed_t *result) | |
1da177e4 | 178 | { |
d0fab0dd AC |
179 | *result = value; |
180 | ||
1da177e4 | 181 | if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID |
e19b2560 | 182 | || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) { |
1da177e4 | 183 | switch (value) { |
e19b2560 AC |
184 | case 300: |
185 | return 0x01; | |
186 | case 600: | |
187 | return 0x02; /* this one not tested */ | |
188 | case 1200: | |
189 | return 0x03; | |
190 | case 2400: | |
191 | return 0x04; | |
192 | case 4800: | |
193 | return 0x06; | |
194 | case 9600: | |
195 | return 0x08; | |
196 | case 19200: | |
197 | return 0x09; | |
198 | case 38400: | |
199 | return 0x0a; | |
200 | case 57600: | |
201 | return 0x0b; | |
202 | case 115200: | |
203 | return 0x0c; | |
1da177e4 | 204 | default: |
d0fab0dd | 205 | *result = 9600; |
1da177e4 LT |
206 | return 0x08; |
207 | } | |
208 | } else { | |
d0fab0dd AC |
209 | /* FIXME: Can we use any divider - should we do |
210 | divider = 115200/value; | |
211 | real baud = 115200/divider */ | |
1da177e4 | 212 | switch (value) { |
b3aceb2b AM |
213 | case 300: break; |
214 | case 600: break; | |
215 | case 1200: break; | |
216 | case 2400: break; | |
217 | case 4800: break; | |
218 | case 9600: break; | |
219 | case 19200: break; | |
220 | case 38400: break; | |
221 | case 57600: break; | |
222 | case 115200: break; | |
223 | default: | |
b3aceb2b | 224 | value = 9600; |
d0fab0dd | 225 | *result = 9600; |
1da177e4 LT |
226 | } |
227 | return 115200/value; | |
228 | } | |
229 | } | |
230 | ||
95da310e AC |
231 | static int mct_u232_set_baud_rate(struct tty_struct *tty, |
232 | struct usb_serial *serial, struct usb_serial_port *port, speed_t value) | |
1da177e4 LT |
233 | { |
234 | __le32 divisor; | |
e19b2560 AC |
235 | int rc; |
236 | unsigned char zero_byte = 0; | |
237 | unsigned char cts_enable_byte = 0; | |
238 | speed_t speed; | |
239 | ||
240 | divisor = cpu_to_le32(mct_u232_calculate_baud_rate(serial, value, | |
241 | &speed)); | |
242 | ||
243 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
244 | MCT_U232_SET_BAUD_RATE_REQUEST, | |
245 | MCT_U232_SET_REQUEST_TYPE, | |
246 | 0, 0, &divisor, MCT_U232_SET_BAUD_RATE_SIZE, | |
247 | WDR_TIMEOUT); | |
d0fab0dd | 248 | if (rc < 0) /*FIXME: What value speed results */ |
1da177e4 | 249 | err("Set BAUD RATE %d failed (error = %d)", value, rc); |
d0fab0dd | 250 | else |
95da310e | 251 | tty_encode_baud_rate(tty, speed, speed); |
1da177e4 LT |
252 | dbg("set_baud_rate: value: 0x%x, divisor: 0x%x", value, divisor); |
253 | ||
254 | /* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which | |
255 | always sends two extra USB 'device request' messages after the | |
256 | 'baud rate change' message. The actual functionality of the | |
257 | request codes in these messages is not fully understood but these | |
258 | particular codes are never seen in any operation besides a baud | |
45b844df DP |
259 | rate change. Both of these messages send a single byte of data. |
260 | In the first message, the value of this byte is always zero. | |
261 | ||
262 | The second message has been determined experimentally to control | |
263 | whether data will be transmitted to a device which is not asserting | |
264 | the 'CTS' signal. If the second message's data byte is zero, data | |
265 | will be transmitted even if 'CTS' is not asserted (i.e. no hardware | |
e19b2560 AC |
266 | flow control). if the second message's data byte is nonzero (a |
267 | value of 1 is used by this driver), data will not be transmitted to | |
268 | a device which is not asserting 'CTS'. | |
45b844df | 269 | */ |
1da177e4 LT |
270 | |
271 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
e19b2560 AC |
272 | MCT_U232_SET_UNKNOWN1_REQUEST, |
273 | MCT_U232_SET_REQUEST_TYPE, | |
274 | 0, 0, &zero_byte, MCT_U232_SET_UNKNOWN1_SIZE, | |
275 | WDR_TIMEOUT); | |
1da177e4 | 276 | if (rc < 0) |
e19b2560 | 277 | err("Sending USB device request code %d failed (error = %d)", |
1da177e4 LT |
278 | MCT_U232_SET_UNKNOWN1_REQUEST, rc); |
279 | ||
e19b2560 | 280 | if (port && C_CRTSCTS(tty)) |
45b844df | 281 | cts_enable_byte = 1; |
45b844df | 282 | |
e19b2560 AC |
283 | dbg("set_baud_rate: send second control message, data = %02X", |
284 | cts_enable_byte); | |
1da177e4 | 285 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
e19b2560 AC |
286 | MCT_U232_SET_CTS_REQUEST, |
287 | MCT_U232_SET_REQUEST_TYPE, | |
288 | 0, 0, &cts_enable_byte, MCT_U232_SET_CTS_SIZE, | |
289 | WDR_TIMEOUT); | |
1da177e4 | 290 | if (rc < 0) |
e19b2560 AC |
291 | err("Sending USB device request code %d failed (error = %d)", |
292 | MCT_U232_SET_CTS_REQUEST, rc); | |
1da177e4 | 293 | |
e19b2560 | 294 | return rc; |
1da177e4 LT |
295 | } /* mct_u232_set_baud_rate */ |
296 | ||
297 | static int mct_u232_set_line_ctrl(struct usb_serial *serial, unsigned char lcr) | |
298 | { | |
e19b2560 AC |
299 | int rc; |
300 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
301 | MCT_U232_SET_LINE_CTRL_REQUEST, | |
302 | MCT_U232_SET_REQUEST_TYPE, | |
303 | 0, 0, &lcr, MCT_U232_SET_LINE_CTRL_SIZE, | |
304 | WDR_TIMEOUT); | |
1da177e4 LT |
305 | if (rc < 0) |
306 | err("Set LINE CTRL 0x%x failed (error = %d)", lcr, rc); | |
307 | dbg("set_line_ctrl: 0x%x", lcr); | |
e19b2560 | 308 | return rc; |
1da177e4 LT |
309 | } /* mct_u232_set_line_ctrl */ |
310 | ||
311 | static int mct_u232_set_modem_ctrl(struct usb_serial *serial, | |
312 | unsigned int control_state) | |
313 | { | |
e19b2560 | 314 | int rc; |
1da177e4 LT |
315 | unsigned char mcr = MCT_U232_MCR_NONE; |
316 | ||
317 | if (control_state & TIOCM_DTR) | |
318 | mcr |= MCT_U232_MCR_DTR; | |
319 | if (control_state & TIOCM_RTS) | |
320 | mcr |= MCT_U232_MCR_RTS; | |
321 | ||
e19b2560 AC |
322 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
323 | MCT_U232_SET_MODEM_CTRL_REQUEST, | |
324 | MCT_U232_SET_REQUEST_TYPE, | |
325 | 0, 0, &mcr, MCT_U232_SET_MODEM_CTRL_SIZE, | |
326 | WDR_TIMEOUT); | |
1da177e4 LT |
327 | if (rc < 0) |
328 | err("Set MODEM CTRL 0x%x failed (error = %d)", mcr, rc); | |
329 | dbg("set_modem_ctrl: state=0x%x ==> mcr=0x%x", control_state, mcr); | |
330 | ||
e19b2560 | 331 | return rc; |
1da177e4 LT |
332 | } /* mct_u232_set_modem_ctrl */ |
333 | ||
e19b2560 AC |
334 | static int mct_u232_get_modem_stat(struct usb_serial *serial, |
335 | unsigned char *msr) | |
1da177e4 | 336 | { |
e19b2560 AC |
337 | int rc; |
338 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
339 | MCT_U232_GET_MODEM_STAT_REQUEST, | |
340 | MCT_U232_GET_REQUEST_TYPE, | |
341 | 0, 0, msr, MCT_U232_GET_MODEM_STAT_SIZE, | |
342 | WDR_TIMEOUT); | |
1da177e4 LT |
343 | if (rc < 0) { |
344 | err("Get MODEM STATus failed (error = %d)", rc); | |
345 | *msr = 0; | |
346 | } | |
347 | dbg("get_modem_stat: 0x%x", *msr); | |
e19b2560 | 348 | return rc; |
1da177e4 LT |
349 | } /* mct_u232_get_modem_stat */ |
350 | ||
e19b2560 AC |
351 | static void mct_u232_msr_to_state(unsigned int *control_state, |
352 | unsigned char msr) | |
1da177e4 | 353 | { |
e19b2560 | 354 | /* Translate Control Line states */ |
1da177e4 LT |
355 | if (msr & MCT_U232_MSR_DSR) |
356 | *control_state |= TIOCM_DSR; | |
357 | else | |
358 | *control_state &= ~TIOCM_DSR; | |
359 | if (msr & MCT_U232_MSR_CTS) | |
360 | *control_state |= TIOCM_CTS; | |
361 | else | |
362 | *control_state &= ~TIOCM_CTS; | |
363 | if (msr & MCT_U232_MSR_RI) | |
364 | *control_state |= TIOCM_RI; | |
365 | else | |
366 | *control_state &= ~TIOCM_RI; | |
367 | if (msr & MCT_U232_MSR_CD) | |
368 | *control_state |= TIOCM_CD; | |
369 | else | |
370 | *control_state &= ~TIOCM_CD; | |
e19b2560 | 371 | dbg("msr_to_state: msr=0x%x ==> state=0x%x", msr, *control_state); |
1da177e4 LT |
372 | } /* mct_u232_msr_to_state */ |
373 | ||
374 | /* | |
375 | * Driver's tty interface functions | |
376 | */ | |
377 | ||
e19b2560 | 378 | static int mct_u232_startup(struct usb_serial *serial) |
1da177e4 LT |
379 | { |
380 | struct mct_u232_private *priv; | |
381 | struct usb_serial_port *port, *rport; | |
382 | ||
80b6ca48 | 383 | priv = kzalloc(sizeof(struct mct_u232_private), GFP_KERNEL); |
1da177e4 LT |
384 | if (!priv) |
385 | return -ENOMEM; | |
1da177e4 LT |
386 | spin_lock_init(&priv->lock); |
387 | usb_set_serial_port_data(serial->port[0], priv); | |
388 | ||
389 | init_waitqueue_head(&serial->port[0]->write_wait); | |
390 | ||
391 | /* Puh, that's dirty */ | |
392 | port = serial->port[0]; | |
393 | rport = serial->port[1]; | |
73135bb9 MK |
394 | /* No unlinking, it wasn't submitted yet. */ |
395 | usb_free_urb(port->read_urb); | |
1da177e4 LT |
396 | port->read_urb = rport->interrupt_in_urb; |
397 | rport->interrupt_in_urb = NULL; | |
398 | port->read_urb->context = port; | |
399 | ||
e19b2560 | 400 | return 0; |
1da177e4 LT |
401 | } /* mct_u232_startup */ |
402 | ||
403 | ||
e19b2560 | 404 | static void mct_u232_shutdown(struct usb_serial *serial) |
1da177e4 LT |
405 | { |
406 | struct mct_u232_private *priv; | |
407 | int i; | |
e19b2560 | 408 | |
441b62c1 | 409 | dbg("%s", __func__); |
1da177e4 | 410 | |
e19b2560 | 411 | for (i = 0; i < serial->num_ports; ++i) { |
1da177e4 LT |
412 | /* My special items, the standard routines free my urbs */ |
413 | priv = usb_get_serial_port_data(serial->port[i]); | |
414 | if (priv) { | |
415 | usb_set_serial_port_data(serial->port[i], NULL); | |
416 | kfree(priv); | |
417 | } | |
418 | } | |
419 | } /* mct_u232_shutdown */ | |
420 | ||
e19b2560 | 421 | static int mct_u232_open(struct tty_struct *tty, |
95da310e | 422 | struct usb_serial_port *port, struct file *filp) |
1da177e4 LT |
423 | { |
424 | struct usb_serial *serial = port->serial; | |
425 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
426 | int retval = 0; | |
427 | unsigned int control_state; | |
428 | unsigned long flags; | |
429 | unsigned char last_lcr; | |
430 | unsigned char last_msr; | |
431 | ||
441b62c1 | 432 | dbg("%s port %d", __func__, port->number); |
1da177e4 LT |
433 | |
434 | /* Compensate for a hardware bug: although the Sitecom U232-P25 | |
435 | * device reports a maximum output packet size of 32 bytes, | |
436 | * it seems to be able to accept only 16 bytes (and that's what | |
437 | * SniffUSB says too...) | |
438 | */ | |
e19b2560 AC |
439 | if (le16_to_cpu(serial->dev->descriptor.idProduct) |
440 | == MCT_U232_SITECOM_PID) | |
1da177e4 LT |
441 | port->bulk_out_size = 16; |
442 | ||
e19b2560 | 443 | /* Do a defined restart: the normal serial device seems to |
1da177e4 LT |
444 | * always turn on DTR and RTS here, so do the same. I'm not |
445 | * sure if this is really necessary. But it should not harm | |
446 | * either. | |
447 | */ | |
448 | spin_lock_irqsave(&priv->lock, flags); | |
95da310e | 449 | if (tty && (tty->termios->c_cflag & CBAUD)) |
1da177e4 LT |
450 | priv->control_state = TIOCM_DTR | TIOCM_RTS; |
451 | else | |
452 | priv->control_state = 0; | |
e19b2560 AC |
453 | |
454 | priv->last_lcr = (MCT_U232_DATA_BITS_8 | | |
1da177e4 LT |
455 | MCT_U232_PARITY_NONE | |
456 | MCT_U232_STOP_BITS_1); | |
457 | control_state = priv->control_state; | |
458 | last_lcr = priv->last_lcr; | |
459 | spin_unlock_irqrestore(&priv->lock, flags); | |
460 | mct_u232_set_modem_ctrl(serial, control_state); | |
461 | mct_u232_set_line_ctrl(serial, last_lcr); | |
462 | ||
463 | /* Read modem status and update control state */ | |
464 | mct_u232_get_modem_stat(serial, &last_msr); | |
465 | spin_lock_irqsave(&priv->lock, flags); | |
466 | priv->last_msr = last_msr; | |
467 | mct_u232_msr_to_state(&priv->control_state, priv->last_msr); | |
468 | spin_unlock_irqrestore(&priv->lock, flags); | |
469 | ||
470 | port->read_urb->dev = port->serial->dev; | |
471 | retval = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
472 | if (retval) { | |
473 | err("usb_submit_urb(read bulk) failed pipe 0x%x err %d", | |
474 | port->read_urb->pipe, retval); | |
2f007de2 | 475 | goto error; |
1da177e4 LT |
476 | } |
477 | ||
478 | port->interrupt_in_urb->dev = port->serial->dev; | |
479 | retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
2f007de2 ON |
480 | if (retval) { |
481 | usb_kill_urb(port->read_urb); | |
1da177e4 LT |
482 | err(" usb_submit_urb(read int) failed pipe 0x%x err %d", |
483 | port->interrupt_in_urb->pipe, retval); | |
2f007de2 ON |
484 | goto error; |
485 | } | |
1da177e4 | 486 | return 0; |
2f007de2 ON |
487 | |
488 | error: | |
489 | return retval; | |
1da177e4 LT |
490 | } /* mct_u232_open */ |
491 | ||
492 | ||
95da310e AC |
493 | static void mct_u232_close(struct tty_struct *tty, |
494 | struct usb_serial_port *port, struct file *filp) | |
1da177e4 | 495 | { |
45b844df | 496 | unsigned int c_cflag; |
45b844df DP |
497 | unsigned int control_state; |
498 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
441b62c1 | 499 | dbg("%s port %d", __func__, port->number); |
1da177e4 | 500 | |
e19b2560 | 501 | if (tty) { |
95da310e | 502 | c_cflag = tty->termios->c_cflag; |
e33fe4d8 ON |
503 | mutex_lock(&port->serial->disc_mutex); |
504 | if (c_cflag & HUPCL && !port->serial->disconnected) { | |
505 | /* drop DTR and RTS */ | |
506 | spin_lock_irq(&priv->lock); | |
507 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
508 | control_state = priv->control_state; | |
509 | spin_unlock_irq(&priv->lock); | |
510 | mct_u232_set_modem_ctrl(port->serial, control_state); | |
45b844df | 511 | } |
e33fe4d8 | 512 | mutex_unlock(&port->serial->disc_mutex); |
45b844df DP |
513 | } |
514 | ||
515 | ||
1da177e4 LT |
516 | if (port->serial->dev) { |
517 | /* shutdown our urbs */ | |
518 | usb_kill_urb(port->write_urb); | |
519 | usb_kill_urb(port->read_urb); | |
520 | usb_kill_urb(port->interrupt_in_urb); | |
521 | } | |
522 | } /* mct_u232_close */ | |
523 | ||
524 | ||
e19b2560 | 525 | static void mct_u232_read_int_callback(struct urb *urb) |
1da177e4 | 526 | { |
cdc97792 | 527 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
528 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
529 | struct usb_serial *serial = port->serial; | |
530 | struct tty_struct *tty; | |
531 | unsigned char *data = urb->transfer_buffer; | |
e96da398 GKH |
532 | int retval; |
533 | int status = urb->status; | |
1da177e4 LT |
534 | unsigned long flags; |
535 | ||
e96da398 | 536 | switch (status) { |
1da177e4 LT |
537 | case 0: |
538 | /* success */ | |
539 | break; | |
540 | case -ECONNRESET: | |
541 | case -ENOENT: | |
542 | case -ESHUTDOWN: | |
543 | /* this urb is terminated, clean up */ | |
e96da398 | 544 | dbg("%s - urb shutting down with status: %d", |
441b62c1 | 545 | __func__, status); |
1da177e4 LT |
546 | return; |
547 | default: | |
e96da398 | 548 | dbg("%s - nonzero urb status received: %d", |
441b62c1 | 549 | __func__, status); |
1da177e4 LT |
550 | goto exit; |
551 | } | |
552 | ||
553 | if (!serial) { | |
441b62c1 | 554 | dbg("%s - bad serial pointer, exiting", __func__); |
1da177e4 LT |
555 | return; |
556 | } | |
557 | ||
e19b2560 AC |
558 | dbg("%s - port %d", __func__, port->number); |
559 | usb_serial_debug_data(debug, &port->dev, __func__, | |
560 | urb->actual_length, data); | |
1da177e4 LT |
561 | |
562 | /* | |
563 | * Work-a-round: handle the 'usual' bulk-in pipe here | |
564 | */ | |
565 | if (urb->transfer_buffer_length > 2) { | |
4a90f09b | 566 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 567 | if (urb->actual_length) { |
acc80758 | 568 | tty_insert_flip_string(tty, data, urb->actual_length); |
1da177e4 | 569 | tty_flip_buffer_push(tty); |
4a90f09b | 570 | tty_kref_put(tty); |
1da177e4 LT |
571 | } |
572 | goto exit; | |
573 | } | |
e19b2560 | 574 | |
1da177e4 LT |
575 | /* |
576 | * The interrupt-in pipe signals exceptional conditions (modem line | |
577 | * signal changes and errors). data[0] holds MSR, data[1] holds LSR. | |
578 | */ | |
579 | spin_lock_irqsave(&priv->lock, flags); | |
580 | priv->last_msr = data[MCT_U232_MSR_INDEX]; | |
e19b2560 | 581 | |
1da177e4 LT |
582 | /* Record Control Line states */ |
583 | mct_u232_msr_to_state(&priv->control_state, priv->last_msr); | |
584 | ||
585 | #if 0 | |
e19b2560 | 586 | /* Not yet handled. See belkin_sa.c for further information */ |
1da177e4 LT |
587 | /* Now to report any errors */ |
588 | priv->last_lsr = data[MCT_U232_LSR_INDEX]; | |
589 | /* | |
590 | * fill in the flip buffer here, but I do not know the relation | |
591 | * to the current/next receive buffer or characters. I need | |
592 | * to look in to this before committing any code. | |
593 | */ | |
594 | if (priv->last_lsr & MCT_U232_LSR_ERR) { | |
4a90f09b | 595 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
596 | /* Overrun Error */ |
597 | if (priv->last_lsr & MCT_U232_LSR_OE) { | |
598 | } | |
599 | /* Parity Error */ | |
600 | if (priv->last_lsr & MCT_U232_LSR_PE) { | |
601 | } | |
602 | /* Framing Error */ | |
603 | if (priv->last_lsr & MCT_U232_LSR_FE) { | |
604 | } | |
605 | /* Break Indicator */ | |
606 | if (priv->last_lsr & MCT_U232_LSR_BI) { | |
607 | } | |
4a90f09b | 608 | tty_kref_put(tty); |
1da177e4 LT |
609 | } |
610 | #endif | |
611 | spin_unlock_irqrestore(&priv->lock, flags); | |
612 | exit: | |
e19b2560 | 613 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
e96da398 | 614 | if (retval) |
e19b2560 | 615 | err("%s - usb_submit_urb failed with result %d", |
441b62c1 | 616 | __func__, retval); |
1da177e4 LT |
617 | } /* mct_u232_read_int_callback */ |
618 | ||
e19b2560 AC |
619 | static void mct_u232_set_termios(struct tty_struct *tty, |
620 | struct usb_serial_port *port, | |
621 | struct ktermios *old_termios) | |
1da177e4 LT |
622 | { |
623 | struct usb_serial *serial = port->serial; | |
624 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
95da310e | 625 | struct ktermios *termios = tty->termios; |
d0fab0dd | 626 | unsigned int cflag = termios->c_cflag; |
1da177e4 LT |
627 | unsigned int old_cflag = old_termios->c_cflag; |
628 | unsigned long flags; | |
45b844df | 629 | unsigned int control_state; |
1da177e4 LT |
630 | unsigned char last_lcr; |
631 | ||
632 | /* get a local copy of the current port settings */ | |
633 | spin_lock_irqsave(&priv->lock, flags); | |
634 | control_state = priv->control_state; | |
635 | spin_unlock_irqrestore(&priv->lock, flags); | |
636 | last_lcr = 0; | |
637 | ||
638 | /* | |
639 | * Update baud rate. | |
640 | * Do not attempt to cache old rates and skip settings, | |
641 | * disconnects screw such tricks up completely. | |
642 | * Premature optimization is the root of all evil. | |
643 | */ | |
644 | ||
e19b2560 | 645 | /* reassert DTR and RTS on transition from B0 */ |
1da177e4 | 646 | if ((old_cflag & CBAUD) == B0) { |
441b62c1 | 647 | dbg("%s: baud was B0", __func__); |
45b844df | 648 | control_state |= TIOCM_DTR | TIOCM_RTS; |
1da177e4 LT |
649 | mct_u232_set_modem_ctrl(serial, control_state); |
650 | } | |
651 | ||
95da310e | 652 | mct_u232_set_baud_rate(tty, serial, port, tty_get_baud_rate(tty)); |
1da177e4 | 653 | |
e19b2560 | 654 | if ((cflag & CBAUD) == B0) { |
441b62c1 | 655 | dbg("%s: baud is B0", __func__); |
1da177e4 LT |
656 | /* Drop RTS and DTR */ |
657 | control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
e19b2560 | 658 | mct_u232_set_modem_ctrl(serial, control_state); |
1da177e4 LT |
659 | } |
660 | ||
661 | /* | |
662 | * Update line control register (LCR) | |
663 | */ | |
664 | ||
665 | /* set the parity */ | |
666 | if (cflag & PARENB) | |
667 | last_lcr |= (cflag & PARODD) ? | |
668 | MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; | |
669 | else | |
670 | last_lcr |= MCT_U232_PARITY_NONE; | |
671 | ||
672 | /* set the number of data bits */ | |
673 | switch (cflag & CSIZE) { | |
674 | case CS5: | |
675 | last_lcr |= MCT_U232_DATA_BITS_5; break; | |
676 | case CS6: | |
677 | last_lcr |= MCT_U232_DATA_BITS_6; break; | |
678 | case CS7: | |
679 | last_lcr |= MCT_U232_DATA_BITS_7; break; | |
680 | case CS8: | |
681 | last_lcr |= MCT_U232_DATA_BITS_8; break; | |
682 | default: | |
683 | err("CSIZE was not CS5-CS8, using default of 8"); | |
684 | last_lcr |= MCT_U232_DATA_BITS_8; | |
685 | break; | |
686 | } | |
687 | ||
d0fab0dd AC |
688 | termios->c_cflag &= ~CMSPAR; |
689 | ||
1da177e4 LT |
690 | /* set the number of stop bits */ |
691 | last_lcr |= (cflag & CSTOPB) ? | |
692 | MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; | |
693 | ||
694 | mct_u232_set_line_ctrl(serial, last_lcr); | |
695 | ||
1da177e4 LT |
696 | /* save off the modified port settings */ |
697 | spin_lock_irqsave(&priv->lock, flags); | |
698 | priv->control_state = control_state; | |
699 | priv->last_lcr = last_lcr; | |
700 | spin_unlock_irqrestore(&priv->lock, flags); | |
701 | } /* mct_u232_set_termios */ | |
702 | ||
95da310e | 703 | static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 704 | { |
95da310e | 705 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
706 | struct usb_serial *serial = port->serial; |
707 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
708 | unsigned char lcr; | |
709 | unsigned long flags; | |
710 | ||
441b62c1 | 711 | dbg("%sstate=%d", __func__, break_state); |
1da177e4 LT |
712 | |
713 | spin_lock_irqsave(&priv->lock, flags); | |
714 | lcr = priv->last_lcr; | |
715 | spin_unlock_irqrestore(&priv->lock, flags); | |
716 | ||
717 | if (break_state) | |
718 | lcr |= MCT_U232_SET_BREAK; | |
719 | ||
720 | mct_u232_set_line_ctrl(serial, lcr); | |
721 | } /* mct_u232_break_ctl */ | |
722 | ||
723 | ||
95da310e | 724 | static int mct_u232_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 725 | { |
95da310e | 726 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
727 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
728 | unsigned int control_state; | |
729 | unsigned long flags; | |
e19b2560 | 730 | |
441b62c1 | 731 | dbg("%s", __func__); |
1da177e4 LT |
732 | |
733 | spin_lock_irqsave(&priv->lock, flags); | |
734 | control_state = priv->control_state; | |
735 | spin_unlock_irqrestore(&priv->lock, flags); | |
736 | ||
737 | return control_state; | |
738 | } | |
739 | ||
95da310e | 740 | static int mct_u232_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
741 | unsigned int set, unsigned int clear) |
742 | { | |
95da310e | 743 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
744 | struct usb_serial *serial = port->serial; |
745 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
746 | unsigned int control_state; | |
747 | unsigned long flags; | |
e19b2560 | 748 | |
441b62c1 | 749 | dbg("%s", __func__); |
1da177e4 LT |
750 | |
751 | spin_lock_irqsave(&priv->lock, flags); | |
752 | control_state = priv->control_state; | |
753 | ||
754 | if (set & TIOCM_RTS) | |
755 | control_state |= TIOCM_RTS; | |
756 | if (set & TIOCM_DTR) | |
757 | control_state |= TIOCM_DTR; | |
758 | if (clear & TIOCM_RTS) | |
759 | control_state &= ~TIOCM_RTS; | |
760 | if (clear & TIOCM_DTR) | |
761 | control_state &= ~TIOCM_DTR; | |
762 | ||
763 | priv->control_state = control_state; | |
764 | spin_unlock_irqrestore(&priv->lock, flags); | |
765 | return mct_u232_set_modem_ctrl(serial, control_state); | |
766 | } | |
767 | ||
95da310e | 768 | static void mct_u232_throttle(struct tty_struct *tty) |
45b844df | 769 | { |
95da310e | 770 | struct usb_serial_port *port = tty->driver_data; |
45b844df DP |
771 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
772 | unsigned long flags; | |
773 | unsigned int control_state; | |
45b844df | 774 | |
441b62c1 | 775 | dbg("%s - port %d", __func__, port->number); |
45b844df DP |
776 | |
777 | spin_lock_irqsave(&priv->lock, flags); | |
778 | priv->rx_flags |= THROTTLED; | |
779 | if (C_CRTSCTS(tty)) { | |
95da310e AC |
780 | priv->control_state &= ~TIOCM_RTS; |
781 | control_state = priv->control_state; | |
782 | spin_unlock_irqrestore(&priv->lock, flags); | |
783 | (void) mct_u232_set_modem_ctrl(port->serial, control_state); | |
45b844df | 784 | } else { |
95da310e | 785 | spin_unlock_irqrestore(&priv->lock, flags); |
45b844df DP |
786 | } |
787 | } | |
788 | ||
789 | ||
95da310e | 790 | static void mct_u232_unthrottle(struct tty_struct *tty) |
45b844df | 791 | { |
95da310e | 792 | struct usb_serial_port *port = tty->driver_data; |
45b844df DP |
793 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
794 | unsigned long flags; | |
795 | unsigned int control_state; | |
45b844df | 796 | |
441b62c1 | 797 | dbg("%s - port %d", __func__, port->number); |
45b844df | 798 | |
45b844df DP |
799 | spin_lock_irqsave(&priv->lock, flags); |
800 | if ((priv->rx_flags & THROTTLED) && C_CRTSCTS(tty)) { | |
95da310e AC |
801 | priv->rx_flags &= ~THROTTLED; |
802 | priv->control_state |= TIOCM_RTS; | |
803 | control_state = priv->control_state; | |
804 | spin_unlock_irqrestore(&priv->lock, flags); | |
805 | (void) mct_u232_set_modem_ctrl(port->serial, control_state); | |
45b844df | 806 | } else { |
95da310e | 807 | spin_unlock_irqrestore(&priv->lock, flags); |
45b844df DP |
808 | } |
809 | } | |
1da177e4 | 810 | |
e19b2560 | 811 | static int __init mct_u232_init(void) |
1da177e4 LT |
812 | { |
813 | int retval; | |
814 | retval = usb_serial_register(&mct_u232_device); | |
815 | if (retval) | |
816 | goto failed_usb_serial_register; | |
817 | retval = usb_register(&mct_u232_driver); | |
818 | if (retval) | |
819 | goto failed_usb_register; | |
c197a8db GKH |
820 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
821 | DRIVER_DESC "\n"); | |
1da177e4 LT |
822 | return 0; |
823 | failed_usb_register: | |
824 | usb_serial_deregister(&mct_u232_device); | |
825 | failed_usb_serial_register: | |
826 | return retval; | |
827 | } | |
828 | ||
829 | ||
e19b2560 | 830 | static void __exit mct_u232_exit(void) |
1da177e4 | 831 | { |
e19b2560 AC |
832 | usb_deregister(&mct_u232_driver); |
833 | usb_serial_deregister(&mct_u232_device); | |
1da177e4 LT |
834 | } |
835 | ||
e19b2560 | 836 | module_init(mct_u232_init); |
1da177e4 LT |
837 | module_exit(mct_u232_exit); |
838 | ||
e19b2560 AC |
839 | MODULE_AUTHOR(DRIVER_AUTHOR); |
840 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
841 | MODULE_LICENSE("GPL"); |
842 | ||
843 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
844 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |