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. | |
1da177e4 LT |
22 | */ |
23 | ||
1da177e4 LT |
24 | #include <linux/kernel.h> |
25 | #include <linux/errno.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/tty.h> | |
29 | #include <linux/tty_driver.h> | |
30 | #include <linux/tty_flip.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/spinlock.h> | |
e19b2560 | 33 | #include <linux/uaccess.h> |
af2ac1a0 | 34 | #include <asm/unaligned.h> |
1da177e4 | 35 | #include <linux/usb.h> |
a969888c | 36 | #include <linux/usb/serial.h> |
7af75af2 VT |
37 | #include <linux/serial.h> |
38 | #include <linux/ioctl.h> | |
1da177e4 LT |
39 | #include "mct_u232.h" |
40 | ||
41 | /* | |
42 | * Version Information | |
43 | */ | |
45b844df | 44 | #define DRIVER_VERSION "z2.1" /* Linux in-kernel version */ |
1da177e4 LT |
45 | #define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>" |
46 | #define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver" | |
47 | ||
90ab5ee9 | 48 | static bool debug; |
1da177e4 LT |
49 | |
50 | /* | |
51 | * Function prototypes | |
52 | */ | |
e19b2560 | 53 | static int mct_u232_startup(struct usb_serial *serial); |
f9c99bb8 | 54 | static void mct_u232_release(struct usb_serial *serial); |
a509a7e4 | 55 | static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
56 | static void mct_u232_close(struct usb_serial_port *port); |
57 | static void mct_u232_dtr_rts(struct usb_serial_port *port, int on); | |
e19b2560 AC |
58 | static void mct_u232_read_int_callback(struct urb *urb); |
59 | static void mct_u232_set_termios(struct tty_struct *tty, | |
60 | struct usb_serial_port *port, struct ktermios *old); | |
61 | static void mct_u232_break_ctl(struct tty_struct *tty, int break_state); | |
60b33c13 | 62 | static int mct_u232_tiocmget(struct tty_struct *tty); |
20b9d177 | 63 | static int mct_u232_tiocmset(struct tty_struct *tty, |
e19b2560 | 64 | unsigned int set, unsigned int clear); |
4acfaf82 | 65 | static int mct_u232_ioctl(struct tty_struct *tty, |
7af75af2 VT |
66 | unsigned int cmd, unsigned long arg); |
67 | static int mct_u232_get_icount(struct tty_struct *tty, | |
68 | struct serial_icounter_struct *icount); | |
e19b2560 AC |
69 | static void mct_u232_throttle(struct tty_struct *tty); |
70 | static void mct_u232_unthrottle(struct tty_struct *tty); | |
45b844df DP |
71 | |
72 | ||
1da177e4 LT |
73 | /* |
74 | * All of the device info needed for the MCT USB-RS232 converter. | |
75 | */ | |
7d40d7e8 | 76 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
77 | { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) }, |
78 | { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) }, | |
79 | { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) }, | |
80 | { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) }, | |
81 | { } /* Terminating entry */ | |
82 | }; | |
83 | ||
e19b2560 | 84 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
85 | |
86 | static struct usb_driver mct_u232_driver = { | |
1da177e4 LT |
87 | .name = "mct_u232", |
88 | .probe = usb_serial_probe, | |
89 | .disconnect = usb_serial_disconnect, | |
90 | .id_table = id_table_combined, | |
ba9dc657 | 91 | .no_dynamic_id = 1, |
1da177e4 LT |
92 | }; |
93 | ||
ea65370d | 94 | static struct usb_serial_driver mct_u232_device = { |
18fcac35 GKH |
95 | .driver = { |
96 | .owner = THIS_MODULE, | |
269bda1c | 97 | .name = "mct_u232", |
18fcac35 | 98 | }, |
269bda1c | 99 | .description = "MCT U232", |
d9b1b787 | 100 | .usb_driver = &mct_u232_driver, |
1da177e4 | 101 | .id_table = id_table_combined, |
1da177e4 LT |
102 | .num_ports = 1, |
103 | .open = mct_u232_open, | |
104 | .close = mct_u232_close, | |
335f8514 | 105 | .dtr_rts = mct_u232_dtr_rts, |
45b844df DP |
106 | .throttle = mct_u232_throttle, |
107 | .unthrottle = mct_u232_unthrottle, | |
1da177e4 | 108 | .read_int_callback = mct_u232_read_int_callback, |
1da177e4 LT |
109 | .set_termios = mct_u232_set_termios, |
110 | .break_ctl = mct_u232_break_ctl, | |
111 | .tiocmget = mct_u232_tiocmget, | |
112 | .tiocmset = mct_u232_tiocmset, | |
113 | .attach = mct_u232_startup, | |
f9c99bb8 | 114 | .release = mct_u232_release, |
7af75af2 VT |
115 | .ioctl = mct_u232_ioctl, |
116 | .get_icount = mct_u232_get_icount, | |
1da177e4 LT |
117 | }; |
118 | ||
1da177e4 LT |
119 | struct mct_u232_private { |
120 | spinlock_t lock; | |
121 | unsigned int control_state; /* Modem Line Setting (TIOCM) */ | |
122 | unsigned char last_lcr; /* Line Control Register */ | |
123 | unsigned char last_lsr; /* Line Status Register */ | |
124 | unsigned char last_msr; /* Modem Status Register */ | |
45b844df | 125 | unsigned int rx_flags; /* Throttling flags */ |
7af75af2 VT |
126 | struct async_icount icount; |
127 | wait_queue_head_t msr_wait; /* for handling sleeping while waiting | |
128 | for msr change to happen */ | |
1da177e4 LT |
129 | }; |
130 | ||
45b844df DP |
131 | #define THROTTLED 0x01 |
132 | ||
1da177e4 LT |
133 | /* |
134 | * Handle vendor specific USB requests | |
135 | */ | |
136 | ||
137 | #define WDR_TIMEOUT 5000 /* default urb timeout */ | |
138 | ||
139 | /* | |
140 | * Later day 2.6.0-test kernels have new baud rates like B230400 which | |
141 | * we do not know how to support. We ignore them for the moment. | |
1da177e4 | 142 | */ |
e19b2560 AC |
143 | static int mct_u232_calculate_baud_rate(struct usb_serial *serial, |
144 | speed_t value, speed_t *result) | |
1da177e4 | 145 | { |
d0fab0dd AC |
146 | *result = value; |
147 | ||
1da177e4 | 148 | if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID |
e19b2560 | 149 | || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) { |
1da177e4 | 150 | switch (value) { |
e19b2560 AC |
151 | case 300: |
152 | return 0x01; | |
153 | case 600: | |
154 | return 0x02; /* this one not tested */ | |
155 | case 1200: | |
156 | return 0x03; | |
157 | case 2400: | |
158 | return 0x04; | |
159 | case 4800: | |
160 | return 0x06; | |
161 | case 9600: | |
162 | return 0x08; | |
163 | case 19200: | |
164 | return 0x09; | |
165 | case 38400: | |
166 | return 0x0a; | |
167 | case 57600: | |
168 | return 0x0b; | |
169 | case 115200: | |
170 | return 0x0c; | |
1da177e4 | 171 | default: |
d0fab0dd | 172 | *result = 9600; |
1da177e4 LT |
173 | return 0x08; |
174 | } | |
175 | } else { | |
d0fab0dd AC |
176 | /* FIXME: Can we use any divider - should we do |
177 | divider = 115200/value; | |
178 | real baud = 115200/divider */ | |
1da177e4 | 179 | switch (value) { |
b3aceb2b AM |
180 | case 300: break; |
181 | case 600: break; | |
182 | case 1200: break; | |
183 | case 2400: break; | |
184 | case 4800: break; | |
185 | case 9600: break; | |
186 | case 19200: break; | |
187 | case 38400: break; | |
188 | case 57600: break; | |
189 | case 115200: break; | |
190 | default: | |
b3aceb2b | 191 | value = 9600; |
d0fab0dd | 192 | *result = 9600; |
1da177e4 LT |
193 | } |
194 | return 115200/value; | |
195 | } | |
196 | } | |
197 | ||
95da310e AC |
198 | static int mct_u232_set_baud_rate(struct tty_struct *tty, |
199 | struct usb_serial *serial, struct usb_serial_port *port, speed_t value) | |
1da177e4 | 200 | { |
af2ac1a0 | 201 | unsigned int divisor; |
e19b2560 | 202 | int rc; |
af2ac1a0 | 203 | unsigned char *buf; |
e19b2560 AC |
204 | unsigned char cts_enable_byte = 0; |
205 | speed_t speed; | |
206 | ||
af2ac1a0 PZ |
207 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); |
208 | if (buf == NULL) | |
209 | return -ENOMEM; | |
e19b2560 | 210 | |
af2ac1a0 PZ |
211 | divisor = mct_u232_calculate_baud_rate(serial, value, &speed); |
212 | put_unaligned_le32(cpu_to_le32(divisor), buf); | |
e19b2560 AC |
213 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
214 | MCT_U232_SET_BAUD_RATE_REQUEST, | |
215 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 216 | 0, 0, buf, MCT_U232_SET_BAUD_RATE_SIZE, |
e19b2560 | 217 | WDR_TIMEOUT); |
d0fab0dd | 218 | if (rc < 0) /*FIXME: What value speed results */ |
194343d9 GKH |
219 | dev_err(&port->dev, "Set BAUD RATE %d failed (error = %d)\n", |
220 | value, rc); | |
d0fab0dd | 221 | else |
95da310e | 222 | tty_encode_baud_rate(tty, speed, speed); |
1da177e4 LT |
223 | dbg("set_baud_rate: value: 0x%x, divisor: 0x%x", value, divisor); |
224 | ||
225 | /* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which | |
226 | always sends two extra USB 'device request' messages after the | |
227 | 'baud rate change' message. The actual functionality of the | |
228 | request codes in these messages is not fully understood but these | |
229 | particular codes are never seen in any operation besides a baud | |
45b844df DP |
230 | rate change. Both of these messages send a single byte of data. |
231 | In the first message, the value of this byte is always zero. | |
232 | ||
233 | The second message has been determined experimentally to control | |
234 | whether data will be transmitted to a device which is not asserting | |
235 | the 'CTS' signal. If the second message's data byte is zero, data | |
236 | will be transmitted even if 'CTS' is not asserted (i.e. no hardware | |
e19b2560 AC |
237 | flow control). if the second message's data byte is nonzero (a |
238 | value of 1 is used by this driver), data will not be transmitted to | |
239 | a device which is not asserting 'CTS'. | |
45b844df | 240 | */ |
1da177e4 | 241 | |
af2ac1a0 | 242 | buf[0] = 0; |
1da177e4 | 243 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
e19b2560 AC |
244 | MCT_U232_SET_UNKNOWN1_REQUEST, |
245 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 246 | 0, 0, buf, MCT_U232_SET_UNKNOWN1_SIZE, |
e19b2560 | 247 | WDR_TIMEOUT); |
1da177e4 | 248 | if (rc < 0) |
194343d9 GKH |
249 | dev_err(&port->dev, "Sending USB device request code %d " |
250 | "failed (error = %d)\n", MCT_U232_SET_UNKNOWN1_REQUEST, | |
251 | rc); | |
1da177e4 | 252 | |
e19b2560 | 253 | if (port && C_CRTSCTS(tty)) |
45b844df | 254 | cts_enable_byte = 1; |
45b844df | 255 | |
e19b2560 AC |
256 | dbg("set_baud_rate: send second control message, data = %02X", |
257 | cts_enable_byte); | |
af2ac1a0 | 258 | buf[0] = cts_enable_byte; |
1da177e4 | 259 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
e19b2560 AC |
260 | MCT_U232_SET_CTS_REQUEST, |
261 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 262 | 0, 0, buf, MCT_U232_SET_CTS_SIZE, |
e19b2560 | 263 | WDR_TIMEOUT); |
1da177e4 | 264 | if (rc < 0) |
194343d9 GKH |
265 | dev_err(&port->dev, "Sending USB device request code %d " |
266 | "failed (error = %d)\n", MCT_U232_SET_CTS_REQUEST, rc); | |
1da177e4 | 267 | |
af2ac1a0 | 268 | kfree(buf); |
e19b2560 | 269 | return rc; |
1da177e4 LT |
270 | } /* mct_u232_set_baud_rate */ |
271 | ||
272 | static int mct_u232_set_line_ctrl(struct usb_serial *serial, unsigned char lcr) | |
273 | { | |
e19b2560 | 274 | int rc; |
af2ac1a0 PZ |
275 | unsigned char *buf; |
276 | ||
277 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
278 | if (buf == NULL) | |
279 | return -ENOMEM; | |
280 | ||
281 | buf[0] = lcr; | |
e19b2560 AC |
282 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
283 | MCT_U232_SET_LINE_CTRL_REQUEST, | |
284 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 285 | 0, 0, buf, MCT_U232_SET_LINE_CTRL_SIZE, |
e19b2560 | 286 | WDR_TIMEOUT); |
1da177e4 | 287 | if (rc < 0) |
194343d9 GKH |
288 | dev_err(&serial->dev->dev, |
289 | "Set LINE CTRL 0x%x failed (error = %d)\n", lcr, rc); | |
1da177e4 | 290 | dbg("set_line_ctrl: 0x%x", lcr); |
af2ac1a0 | 291 | kfree(buf); |
e19b2560 | 292 | return rc; |
1da177e4 LT |
293 | } /* mct_u232_set_line_ctrl */ |
294 | ||
295 | static int mct_u232_set_modem_ctrl(struct usb_serial *serial, | |
296 | unsigned int control_state) | |
297 | { | |
e19b2560 | 298 | int rc; |
af2ac1a0 PZ |
299 | unsigned char mcr; |
300 | unsigned char *buf; | |
301 | ||
302 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
303 | if (buf == NULL) | |
304 | return -ENOMEM; | |
1da177e4 | 305 | |
af2ac1a0 | 306 | mcr = MCT_U232_MCR_NONE; |
1da177e4 LT |
307 | if (control_state & TIOCM_DTR) |
308 | mcr |= MCT_U232_MCR_DTR; | |
309 | if (control_state & TIOCM_RTS) | |
310 | mcr |= MCT_U232_MCR_RTS; | |
311 | ||
af2ac1a0 | 312 | buf[0] = mcr; |
e19b2560 AC |
313 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
314 | MCT_U232_SET_MODEM_CTRL_REQUEST, | |
315 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 316 | 0, 0, buf, MCT_U232_SET_MODEM_CTRL_SIZE, |
e19b2560 | 317 | WDR_TIMEOUT); |
1da177e4 | 318 | if (rc < 0) |
194343d9 GKH |
319 | dev_err(&serial->dev->dev, |
320 | "Set MODEM CTRL 0x%x failed (error = %d)\n", mcr, rc); | |
1da177e4 LT |
321 | dbg("set_modem_ctrl: state=0x%x ==> mcr=0x%x", control_state, mcr); |
322 | ||
af2ac1a0 | 323 | kfree(buf); |
e19b2560 | 324 | return rc; |
1da177e4 LT |
325 | } /* mct_u232_set_modem_ctrl */ |
326 | ||
e19b2560 AC |
327 | static int mct_u232_get_modem_stat(struct usb_serial *serial, |
328 | unsigned char *msr) | |
1da177e4 | 329 | { |
e19b2560 | 330 | int rc; |
af2ac1a0 PZ |
331 | unsigned char *buf; |
332 | ||
333 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
334 | if (buf == NULL) { | |
335 | *msr = 0; | |
336 | return -ENOMEM; | |
337 | } | |
e19b2560 AC |
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, | |
af2ac1a0 | 341 | 0, 0, buf, MCT_U232_GET_MODEM_STAT_SIZE, |
e19b2560 | 342 | WDR_TIMEOUT); |
1da177e4 | 343 | if (rc < 0) { |
194343d9 GKH |
344 | dev_err(&serial->dev->dev, |
345 | "Get MODEM STATus failed (error = %d)\n", rc); | |
1da177e4 | 346 | *msr = 0; |
af2ac1a0 PZ |
347 | } else { |
348 | *msr = buf[0]; | |
1da177e4 LT |
349 | } |
350 | dbg("get_modem_stat: 0x%x", *msr); | |
af2ac1a0 | 351 | kfree(buf); |
e19b2560 | 352 | return rc; |
1da177e4 LT |
353 | } /* mct_u232_get_modem_stat */ |
354 | ||
7af75af2 VT |
355 | static void mct_u232_msr_to_icount(struct async_icount *icount, |
356 | unsigned char msr) | |
357 | { | |
358 | /* Translate Control Line states */ | |
359 | if (msr & MCT_U232_MSR_DDSR) | |
360 | icount->dsr++; | |
361 | if (msr & MCT_U232_MSR_DCTS) | |
362 | icount->cts++; | |
363 | if (msr & MCT_U232_MSR_DRI) | |
364 | icount->rng++; | |
365 | if (msr & MCT_U232_MSR_DCD) | |
366 | icount->dcd++; | |
367 | } /* mct_u232_msr_to_icount */ | |
368 | ||
e19b2560 AC |
369 | static void mct_u232_msr_to_state(unsigned int *control_state, |
370 | unsigned char msr) | |
1da177e4 | 371 | { |
e19b2560 | 372 | /* Translate Control Line states */ |
1da177e4 LT |
373 | if (msr & MCT_U232_MSR_DSR) |
374 | *control_state |= TIOCM_DSR; | |
375 | else | |
376 | *control_state &= ~TIOCM_DSR; | |
377 | if (msr & MCT_U232_MSR_CTS) | |
378 | *control_state |= TIOCM_CTS; | |
379 | else | |
380 | *control_state &= ~TIOCM_CTS; | |
381 | if (msr & MCT_U232_MSR_RI) | |
382 | *control_state |= TIOCM_RI; | |
383 | else | |
384 | *control_state &= ~TIOCM_RI; | |
385 | if (msr & MCT_U232_MSR_CD) | |
386 | *control_state |= TIOCM_CD; | |
387 | else | |
388 | *control_state &= ~TIOCM_CD; | |
e19b2560 | 389 | dbg("msr_to_state: msr=0x%x ==> state=0x%x", msr, *control_state); |
1da177e4 LT |
390 | } /* mct_u232_msr_to_state */ |
391 | ||
392 | /* | |
393 | * Driver's tty interface functions | |
394 | */ | |
395 | ||
e19b2560 | 396 | static int mct_u232_startup(struct usb_serial *serial) |
1da177e4 LT |
397 | { |
398 | struct mct_u232_private *priv; | |
399 | struct usb_serial_port *port, *rport; | |
400 | ||
80b6ca48 | 401 | priv = kzalloc(sizeof(struct mct_u232_private), GFP_KERNEL); |
1da177e4 LT |
402 | if (!priv) |
403 | return -ENOMEM; | |
1da177e4 | 404 | spin_lock_init(&priv->lock); |
7af75af2 | 405 | init_waitqueue_head(&priv->msr_wait); |
1da177e4 LT |
406 | usb_set_serial_port_data(serial->port[0], priv); |
407 | ||
408 | init_waitqueue_head(&serial->port[0]->write_wait); | |
409 | ||
410 | /* Puh, that's dirty */ | |
411 | port = serial->port[0]; | |
412 | rport = serial->port[1]; | |
73135bb9 MK |
413 | /* No unlinking, it wasn't submitted yet. */ |
414 | usb_free_urb(port->read_urb); | |
1da177e4 LT |
415 | port->read_urb = rport->interrupt_in_urb; |
416 | rport->interrupt_in_urb = NULL; | |
417 | port->read_urb->context = port; | |
418 | ||
e19b2560 | 419 | return 0; |
1da177e4 LT |
420 | } /* mct_u232_startup */ |
421 | ||
422 | ||
f9c99bb8 | 423 | static void mct_u232_release(struct usb_serial *serial) |
1da177e4 LT |
424 | { |
425 | struct mct_u232_private *priv; | |
426 | int i; | |
e19b2560 | 427 | |
441b62c1 | 428 | dbg("%s", __func__); |
1da177e4 | 429 | |
e19b2560 | 430 | for (i = 0; i < serial->num_ports; ++i) { |
1da177e4 LT |
431 | /* My special items, the standard routines free my urbs */ |
432 | priv = usb_get_serial_port_data(serial->port[i]); | |
f9c99bb8 | 433 | kfree(priv); |
1da177e4 | 434 | } |
f9c99bb8 | 435 | } /* mct_u232_release */ |
1da177e4 | 436 | |
a509a7e4 | 437 | static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
438 | { |
439 | struct usb_serial *serial = port->serial; | |
440 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
441 | int retval = 0; | |
442 | unsigned int control_state; | |
443 | unsigned long flags; | |
444 | unsigned char last_lcr; | |
445 | unsigned char last_msr; | |
446 | ||
441b62c1 | 447 | dbg("%s port %d", __func__, port->number); |
1da177e4 LT |
448 | |
449 | /* Compensate for a hardware bug: although the Sitecom U232-P25 | |
450 | * device reports a maximum output packet size of 32 bytes, | |
451 | * it seems to be able to accept only 16 bytes (and that's what | |
452 | * SniffUSB says too...) | |
453 | */ | |
e19b2560 AC |
454 | if (le16_to_cpu(serial->dev->descriptor.idProduct) |
455 | == MCT_U232_SITECOM_PID) | |
1da177e4 LT |
456 | port->bulk_out_size = 16; |
457 | ||
e19b2560 | 458 | /* Do a defined restart: the normal serial device seems to |
1da177e4 LT |
459 | * always turn on DTR and RTS here, so do the same. I'm not |
460 | * sure if this is really necessary. But it should not harm | |
461 | * either. | |
462 | */ | |
463 | spin_lock_irqsave(&priv->lock, flags); | |
95da310e | 464 | if (tty && (tty->termios->c_cflag & CBAUD)) |
1da177e4 LT |
465 | priv->control_state = TIOCM_DTR | TIOCM_RTS; |
466 | else | |
467 | priv->control_state = 0; | |
e19b2560 AC |
468 | |
469 | priv->last_lcr = (MCT_U232_DATA_BITS_8 | | |
1da177e4 LT |
470 | MCT_U232_PARITY_NONE | |
471 | MCT_U232_STOP_BITS_1); | |
472 | control_state = priv->control_state; | |
473 | last_lcr = priv->last_lcr; | |
474 | spin_unlock_irqrestore(&priv->lock, flags); | |
475 | mct_u232_set_modem_ctrl(serial, control_state); | |
476 | mct_u232_set_line_ctrl(serial, last_lcr); | |
477 | ||
478 | /* Read modem status and update control state */ | |
479 | mct_u232_get_modem_stat(serial, &last_msr); | |
480 | spin_lock_irqsave(&priv->lock, flags); | |
481 | priv->last_msr = last_msr; | |
482 | mct_u232_msr_to_state(&priv->control_state, priv->last_msr); | |
483 | spin_unlock_irqrestore(&priv->lock, flags); | |
484 | ||
1da177e4 LT |
485 | retval = usb_submit_urb(port->read_urb, GFP_KERNEL); |
486 | if (retval) { | |
194343d9 GKH |
487 | dev_err(&port->dev, |
488 | "usb_submit_urb(read bulk) failed pipe 0x%x err %d\n", | |
489 | port->read_urb->pipe, retval); | |
2f007de2 | 490 | goto error; |
1da177e4 LT |
491 | } |
492 | ||
1da177e4 | 493 | retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
2f007de2 ON |
494 | if (retval) { |
495 | usb_kill_urb(port->read_urb); | |
194343d9 GKH |
496 | dev_err(&port->dev, |
497 | "usb_submit_urb(read int) failed pipe 0x%x err %d", | |
498 | port->interrupt_in_urb->pipe, retval); | |
2f007de2 ON |
499 | goto error; |
500 | } | |
1da177e4 | 501 | return 0; |
2f007de2 ON |
502 | |
503 | error: | |
504 | return retval; | |
1da177e4 LT |
505 | } /* mct_u232_open */ |
506 | ||
335f8514 | 507 | static void mct_u232_dtr_rts(struct usb_serial_port *port, int on) |
1da177e4 | 508 | { |
45b844df DP |
509 | unsigned int control_state; |
510 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
1da177e4 | 511 | |
335f8514 AC |
512 | mutex_lock(&port->serial->disc_mutex); |
513 | if (!port->serial->disconnected) { | |
514 | /* drop DTR and RTS */ | |
515 | spin_lock_irq(&priv->lock); | |
516 | if (on) | |
517 | priv->control_state |= TIOCM_DTR | TIOCM_RTS; | |
518 | else | |
e33fe4d8 | 519 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); |
335f8514 AC |
520 | control_state = priv->control_state; |
521 | spin_unlock_irq(&priv->lock); | |
522 | mct_u232_set_modem_ctrl(port->serial, control_state); | |
45b844df | 523 | } |
335f8514 AC |
524 | mutex_unlock(&port->serial->disc_mutex); |
525 | } | |
45b844df | 526 | |
335f8514 AC |
527 | static void mct_u232_close(struct usb_serial_port *port) |
528 | { | |
529 | dbg("%s port %d", __func__, port->number); | |
45b844df | 530 | |
92ca0dc5 JH |
531 | if (port->serial->dev) { |
532 | /* shutdown our urbs */ | |
533 | usb_kill_urb(port->write_urb); | |
534 | usb_kill_urb(port->read_urb); | |
1da177e4 | 535 | usb_kill_urb(port->interrupt_in_urb); |
92ca0dc5 | 536 | } |
1da177e4 LT |
537 | } /* mct_u232_close */ |
538 | ||
539 | ||
e19b2560 | 540 | static void mct_u232_read_int_callback(struct urb *urb) |
1da177e4 | 541 | { |
cdc97792 | 542 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
543 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
544 | struct usb_serial *serial = port->serial; | |
545 | struct tty_struct *tty; | |
546 | unsigned char *data = urb->transfer_buffer; | |
e96da398 GKH |
547 | int retval; |
548 | int status = urb->status; | |
1da177e4 LT |
549 | unsigned long flags; |
550 | ||
e96da398 | 551 | switch (status) { |
1da177e4 LT |
552 | case 0: |
553 | /* success */ | |
554 | break; | |
555 | case -ECONNRESET: | |
556 | case -ENOENT: | |
557 | case -ESHUTDOWN: | |
558 | /* this urb is terminated, clean up */ | |
e96da398 | 559 | dbg("%s - urb shutting down with status: %d", |
441b62c1 | 560 | __func__, status); |
1da177e4 LT |
561 | return; |
562 | default: | |
e96da398 | 563 | dbg("%s - nonzero urb status received: %d", |
441b62c1 | 564 | __func__, status); |
1da177e4 LT |
565 | goto exit; |
566 | } | |
567 | ||
568 | if (!serial) { | |
441b62c1 | 569 | dbg("%s - bad serial pointer, exiting", __func__); |
1da177e4 LT |
570 | return; |
571 | } | |
572 | ||
e19b2560 AC |
573 | dbg("%s - port %d", __func__, port->number); |
574 | usb_serial_debug_data(debug, &port->dev, __func__, | |
575 | urb->actual_length, data); | |
1da177e4 LT |
576 | |
577 | /* | |
578 | * Work-a-round: handle the 'usual' bulk-in pipe here | |
579 | */ | |
580 | if (urb->transfer_buffer_length > 2) { | |
1da177e4 | 581 | if (urb->actual_length) { |
054f2346 JS |
582 | tty = tty_port_tty_get(&port->port); |
583 | if (tty) { | |
584 | tty_insert_flip_string(tty, data, | |
585 | urb->actual_length); | |
586 | tty_flip_buffer_push(tty); | |
587 | } | |
4a90f09b | 588 | tty_kref_put(tty); |
1da177e4 LT |
589 | } |
590 | goto exit; | |
591 | } | |
e19b2560 | 592 | |
1da177e4 LT |
593 | /* |
594 | * The interrupt-in pipe signals exceptional conditions (modem line | |
595 | * signal changes and errors). data[0] holds MSR, data[1] holds LSR. | |
596 | */ | |
597 | spin_lock_irqsave(&priv->lock, flags); | |
598 | priv->last_msr = data[MCT_U232_MSR_INDEX]; | |
e19b2560 | 599 | |
1da177e4 LT |
600 | /* Record Control Line states */ |
601 | mct_u232_msr_to_state(&priv->control_state, priv->last_msr); | |
602 | ||
7af75af2 VT |
603 | mct_u232_msr_to_icount(&priv->icount, priv->last_msr); |
604 | ||
1da177e4 | 605 | #if 0 |
e19b2560 | 606 | /* Not yet handled. See belkin_sa.c for further information */ |
1da177e4 LT |
607 | /* Now to report any errors */ |
608 | priv->last_lsr = data[MCT_U232_LSR_INDEX]; | |
609 | /* | |
610 | * fill in the flip buffer here, but I do not know the relation | |
611 | * to the current/next receive buffer or characters. I need | |
612 | * to look in to this before committing any code. | |
613 | */ | |
614 | if (priv->last_lsr & MCT_U232_LSR_ERR) { | |
4a90f09b | 615 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
616 | /* Overrun Error */ |
617 | if (priv->last_lsr & MCT_U232_LSR_OE) { | |
618 | } | |
619 | /* Parity Error */ | |
620 | if (priv->last_lsr & MCT_U232_LSR_PE) { | |
621 | } | |
622 | /* Framing Error */ | |
623 | if (priv->last_lsr & MCT_U232_LSR_FE) { | |
624 | } | |
625 | /* Break Indicator */ | |
626 | if (priv->last_lsr & MCT_U232_LSR_BI) { | |
627 | } | |
4a90f09b | 628 | tty_kref_put(tty); |
1da177e4 LT |
629 | } |
630 | #endif | |
7af75af2 | 631 | wake_up_interruptible(&priv->msr_wait); |
1da177e4 LT |
632 | spin_unlock_irqrestore(&priv->lock, flags); |
633 | exit: | |
e19b2560 | 634 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
e96da398 | 635 | if (retval) |
194343d9 GKH |
636 | dev_err(&port->dev, |
637 | "%s - usb_submit_urb failed with result %d\n", | |
638 | __func__, retval); | |
1da177e4 LT |
639 | } /* mct_u232_read_int_callback */ |
640 | ||
e19b2560 AC |
641 | static void mct_u232_set_termios(struct tty_struct *tty, |
642 | struct usb_serial_port *port, | |
643 | struct ktermios *old_termios) | |
1da177e4 LT |
644 | { |
645 | struct usb_serial *serial = port->serial; | |
646 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
95da310e | 647 | struct ktermios *termios = tty->termios; |
d0fab0dd | 648 | unsigned int cflag = termios->c_cflag; |
1da177e4 LT |
649 | unsigned int old_cflag = old_termios->c_cflag; |
650 | unsigned long flags; | |
45b844df | 651 | unsigned int control_state; |
1da177e4 LT |
652 | unsigned char last_lcr; |
653 | ||
654 | /* get a local copy of the current port settings */ | |
655 | spin_lock_irqsave(&priv->lock, flags); | |
656 | control_state = priv->control_state; | |
657 | spin_unlock_irqrestore(&priv->lock, flags); | |
658 | last_lcr = 0; | |
659 | ||
660 | /* | |
661 | * Update baud rate. | |
662 | * Do not attempt to cache old rates and skip settings, | |
663 | * disconnects screw such tricks up completely. | |
664 | * Premature optimization is the root of all evil. | |
665 | */ | |
666 | ||
e19b2560 | 667 | /* reassert DTR and RTS on transition from B0 */ |
1da177e4 | 668 | if ((old_cflag & CBAUD) == B0) { |
441b62c1 | 669 | dbg("%s: baud was B0", __func__); |
45b844df | 670 | control_state |= TIOCM_DTR | TIOCM_RTS; |
1da177e4 LT |
671 | mct_u232_set_modem_ctrl(serial, control_state); |
672 | } | |
673 | ||
95da310e | 674 | mct_u232_set_baud_rate(tty, serial, port, tty_get_baud_rate(tty)); |
1da177e4 | 675 | |
e19b2560 | 676 | if ((cflag & CBAUD) == B0) { |
441b62c1 | 677 | dbg("%s: baud is B0", __func__); |
1da177e4 LT |
678 | /* Drop RTS and DTR */ |
679 | control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
e19b2560 | 680 | mct_u232_set_modem_ctrl(serial, control_state); |
1da177e4 LT |
681 | } |
682 | ||
683 | /* | |
684 | * Update line control register (LCR) | |
685 | */ | |
686 | ||
687 | /* set the parity */ | |
688 | if (cflag & PARENB) | |
689 | last_lcr |= (cflag & PARODD) ? | |
690 | MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; | |
691 | else | |
692 | last_lcr |= MCT_U232_PARITY_NONE; | |
693 | ||
694 | /* set the number of data bits */ | |
695 | switch (cflag & CSIZE) { | |
696 | case CS5: | |
697 | last_lcr |= MCT_U232_DATA_BITS_5; break; | |
698 | case CS6: | |
699 | last_lcr |= MCT_U232_DATA_BITS_6; break; | |
700 | case CS7: | |
701 | last_lcr |= MCT_U232_DATA_BITS_7; break; | |
702 | case CS8: | |
703 | last_lcr |= MCT_U232_DATA_BITS_8; break; | |
704 | default: | |
194343d9 GKH |
705 | dev_err(&port->dev, |
706 | "CSIZE was not CS5-CS8, using default of 8\n"); | |
1da177e4 LT |
707 | last_lcr |= MCT_U232_DATA_BITS_8; |
708 | break; | |
709 | } | |
710 | ||
d0fab0dd AC |
711 | termios->c_cflag &= ~CMSPAR; |
712 | ||
1da177e4 LT |
713 | /* set the number of stop bits */ |
714 | last_lcr |= (cflag & CSTOPB) ? | |
715 | MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; | |
716 | ||
717 | mct_u232_set_line_ctrl(serial, last_lcr); | |
718 | ||
1da177e4 LT |
719 | /* save off the modified port settings */ |
720 | spin_lock_irqsave(&priv->lock, flags); | |
721 | priv->control_state = control_state; | |
722 | priv->last_lcr = last_lcr; | |
723 | spin_unlock_irqrestore(&priv->lock, flags); | |
724 | } /* mct_u232_set_termios */ | |
725 | ||
95da310e | 726 | static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 727 | { |
95da310e | 728 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
729 | struct usb_serial *serial = port->serial; |
730 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
731 | unsigned char lcr; | |
732 | unsigned long flags; | |
733 | ||
441b62c1 | 734 | dbg("%sstate=%d", __func__, break_state); |
1da177e4 LT |
735 | |
736 | spin_lock_irqsave(&priv->lock, flags); | |
737 | lcr = priv->last_lcr; | |
1da177e4 LT |
738 | |
739 | if (break_state) | |
740 | lcr |= MCT_U232_SET_BREAK; | |
6b447f04 | 741 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
742 | |
743 | mct_u232_set_line_ctrl(serial, lcr); | |
744 | } /* mct_u232_break_ctl */ | |
745 | ||
746 | ||
60b33c13 | 747 | static int mct_u232_tiocmget(struct tty_struct *tty) |
1da177e4 | 748 | { |
95da310e | 749 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
750 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
751 | unsigned int control_state; | |
752 | unsigned long flags; | |
e19b2560 | 753 | |
441b62c1 | 754 | dbg("%s", __func__); |
1da177e4 LT |
755 | |
756 | spin_lock_irqsave(&priv->lock, flags); | |
757 | control_state = priv->control_state; | |
758 | spin_unlock_irqrestore(&priv->lock, flags); | |
759 | ||
760 | return control_state; | |
761 | } | |
762 | ||
20b9d177 | 763 | static int mct_u232_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
764 | unsigned int set, unsigned int clear) |
765 | { | |
95da310e | 766 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
767 | struct usb_serial *serial = port->serial; |
768 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
769 | unsigned int control_state; | |
770 | unsigned long flags; | |
e19b2560 | 771 | |
441b62c1 | 772 | dbg("%s", __func__); |
1da177e4 LT |
773 | |
774 | spin_lock_irqsave(&priv->lock, flags); | |
775 | control_state = priv->control_state; | |
776 | ||
777 | if (set & TIOCM_RTS) | |
778 | control_state |= TIOCM_RTS; | |
779 | if (set & TIOCM_DTR) | |
780 | control_state |= TIOCM_DTR; | |
781 | if (clear & TIOCM_RTS) | |
782 | control_state &= ~TIOCM_RTS; | |
783 | if (clear & TIOCM_DTR) | |
784 | control_state &= ~TIOCM_DTR; | |
785 | ||
786 | priv->control_state = control_state; | |
787 | spin_unlock_irqrestore(&priv->lock, flags); | |
788 | return mct_u232_set_modem_ctrl(serial, control_state); | |
789 | } | |
790 | ||
95da310e | 791 | static void mct_u232_throttle(struct tty_struct *tty) |
45b844df | 792 | { |
95da310e | 793 | struct usb_serial_port *port = tty->driver_data; |
45b844df | 794 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
45b844df | 795 | unsigned int control_state; |
45b844df | 796 | |
441b62c1 | 797 | dbg("%s - port %d", __func__, port->number); |
45b844df | 798 | |
63832515 | 799 | spin_lock_irq(&priv->lock); |
45b844df DP |
800 | priv->rx_flags |= THROTTLED; |
801 | if (C_CRTSCTS(tty)) { | |
95da310e AC |
802 | priv->control_state &= ~TIOCM_RTS; |
803 | control_state = priv->control_state; | |
63832515 | 804 | spin_unlock_irq(&priv->lock); |
95da310e | 805 | (void) mct_u232_set_modem_ctrl(port->serial, control_state); |
45b844df | 806 | } else { |
63832515 | 807 | spin_unlock_irq(&priv->lock); |
45b844df DP |
808 | } |
809 | } | |
810 | ||
95da310e | 811 | static void mct_u232_unthrottle(struct tty_struct *tty) |
45b844df | 812 | { |
95da310e | 813 | struct usb_serial_port *port = tty->driver_data; |
45b844df | 814 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
45b844df | 815 | unsigned int control_state; |
45b844df | 816 | |
441b62c1 | 817 | dbg("%s - port %d", __func__, port->number); |
45b844df | 818 | |
63832515 | 819 | spin_lock_irq(&priv->lock); |
45b844df | 820 | if ((priv->rx_flags & THROTTLED) && C_CRTSCTS(tty)) { |
95da310e AC |
821 | priv->rx_flags &= ~THROTTLED; |
822 | priv->control_state |= TIOCM_RTS; | |
823 | control_state = priv->control_state; | |
63832515 | 824 | spin_unlock_irq(&priv->lock); |
95da310e | 825 | (void) mct_u232_set_modem_ctrl(port->serial, control_state); |
45b844df | 826 | } else { |
63832515 | 827 | spin_unlock_irq(&priv->lock); |
45b844df DP |
828 | } |
829 | } | |
1da177e4 | 830 | |
4acfaf82 | 831 | static int mct_u232_ioctl(struct tty_struct *tty, |
7af75af2 VT |
832 | unsigned int cmd, unsigned long arg) |
833 | { | |
834 | DEFINE_WAIT(wait); | |
835 | struct usb_serial_port *port = tty->driver_data; | |
836 | struct mct_u232_private *mct_u232_port = usb_get_serial_port_data(port); | |
837 | struct async_icount cnow, cprev; | |
838 | unsigned long flags; | |
839 | ||
840 | dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); | |
841 | ||
842 | switch (cmd) { | |
843 | ||
844 | case TIOCMIWAIT: | |
845 | ||
846 | dbg("%s (%d) TIOCMIWAIT", __func__, port->number); | |
847 | ||
848 | spin_lock_irqsave(&mct_u232_port->lock, flags); | |
849 | cprev = mct_u232_port->icount; | |
850 | spin_unlock_irqrestore(&mct_u232_port->lock, flags); | |
851 | for ( ; ; ) { | |
852 | prepare_to_wait(&mct_u232_port->msr_wait, | |
853 | &wait, TASK_INTERRUPTIBLE); | |
854 | schedule(); | |
855 | finish_wait(&mct_u232_port->msr_wait, &wait); | |
856 | /* see if a signal did it */ | |
857 | if (signal_pending(current)) | |
858 | return -ERESTARTSYS; | |
859 | spin_lock_irqsave(&mct_u232_port->lock, flags); | |
860 | cnow = mct_u232_port->icount; | |
861 | spin_unlock_irqrestore(&mct_u232_port->lock, flags); | |
862 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
863 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
864 | return -EIO; /* no change => error */ | |
865 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
866 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
867 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
868 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { | |
869 | return 0; | |
870 | } | |
871 | cprev = cnow; | |
872 | } | |
873 | ||
874 | } | |
875 | return -ENOIOCTLCMD; | |
876 | } | |
877 | ||
878 | static int mct_u232_get_icount(struct tty_struct *tty, | |
879 | struct serial_icounter_struct *icount) | |
880 | { | |
881 | struct usb_serial_port *port = tty->driver_data; | |
882 | struct mct_u232_private *mct_u232_port = usb_get_serial_port_data(port); | |
883 | struct async_icount *ic = &mct_u232_port->icount; | |
884 | unsigned long flags; | |
885 | ||
886 | spin_lock_irqsave(&mct_u232_port->lock, flags); | |
887 | ||
888 | icount->cts = ic->cts; | |
889 | icount->dsr = ic->dsr; | |
890 | icount->rng = ic->rng; | |
891 | icount->dcd = ic->dcd; | |
892 | icount->rx = ic->rx; | |
893 | icount->tx = ic->tx; | |
894 | icount->frame = ic->frame; | |
895 | icount->overrun = ic->overrun; | |
896 | icount->parity = ic->parity; | |
897 | icount->brk = ic->brk; | |
898 | icount->buf_overrun = ic->buf_overrun; | |
899 | ||
900 | spin_unlock_irqrestore(&mct_u232_port->lock, flags); | |
901 | ||
902 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", | |
903 | __func__, port->number, icount->rx, icount->tx); | |
904 | return 0; | |
905 | } | |
906 | ||
e19b2560 | 907 | static int __init mct_u232_init(void) |
1da177e4 LT |
908 | { |
909 | int retval; | |
910 | retval = usb_serial_register(&mct_u232_device); | |
911 | if (retval) | |
912 | goto failed_usb_serial_register; | |
913 | retval = usb_register(&mct_u232_driver); | |
914 | if (retval) | |
915 | goto failed_usb_register; | |
c197a8db GKH |
916 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
917 | DRIVER_DESC "\n"); | |
1da177e4 LT |
918 | return 0; |
919 | failed_usb_register: | |
920 | usb_serial_deregister(&mct_u232_device); | |
921 | failed_usb_serial_register: | |
922 | return retval; | |
923 | } | |
924 | ||
925 | ||
e19b2560 | 926 | static void __exit mct_u232_exit(void) |
1da177e4 | 927 | { |
e19b2560 AC |
928 | usb_deregister(&mct_u232_driver); |
929 | usb_serial_deregister(&mct_u232_device); | |
1da177e4 LT |
930 | } |
931 | ||
e19b2560 | 932 | module_init(mct_u232_init); |
1da177e4 LT |
933 | module_exit(mct_u232_exit); |
934 | ||
e19b2560 AC |
935 | MODULE_AUTHOR(DRIVER_AUTHOR); |
936 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
937 | MODULE_LICENSE("GPL"); |
938 | ||
939 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
940 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |