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 | ||
1da177e4 LT |
48 | /* |
49 | * Function prototypes | |
50 | */ | |
e19b2560 | 51 | static int mct_u232_startup(struct usb_serial *serial); |
f9c99bb8 | 52 | static void mct_u232_release(struct usb_serial *serial); |
a509a7e4 | 53 | static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
54 | static void mct_u232_close(struct usb_serial_port *port); |
55 | static void mct_u232_dtr_rts(struct usb_serial_port *port, int on); | |
e19b2560 AC |
56 | static void mct_u232_read_int_callback(struct urb *urb); |
57 | static void mct_u232_set_termios(struct tty_struct *tty, | |
58 | struct usb_serial_port *port, struct ktermios *old); | |
59 | static void mct_u232_break_ctl(struct tty_struct *tty, int break_state); | |
60b33c13 | 60 | static int mct_u232_tiocmget(struct tty_struct *tty); |
20b9d177 | 61 | static int mct_u232_tiocmset(struct tty_struct *tty, |
e19b2560 | 62 | unsigned int set, unsigned int clear); |
4acfaf82 | 63 | static int mct_u232_ioctl(struct tty_struct *tty, |
7af75af2 VT |
64 | unsigned int cmd, unsigned long arg); |
65 | static int mct_u232_get_icount(struct tty_struct *tty, | |
66 | struct serial_icounter_struct *icount); | |
e19b2560 AC |
67 | static void mct_u232_throttle(struct tty_struct *tty); |
68 | static void mct_u232_unthrottle(struct tty_struct *tty); | |
45b844df DP |
69 | |
70 | ||
1da177e4 LT |
71 | /* |
72 | * All of the device info needed for the MCT USB-RS232 converter. | |
73 | */ | |
68e24113 | 74 | static const struct usb_device_id id_table[] = { |
1da177e4 LT |
75 | { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) }, |
76 | { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) }, | |
77 | { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) }, | |
78 | { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) }, | |
79 | { } /* Terminating entry */ | |
80 | }; | |
68e24113 | 81 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 82 | |
ea65370d | 83 | static struct usb_serial_driver mct_u232_device = { |
18fcac35 GKH |
84 | .driver = { |
85 | .owner = THIS_MODULE, | |
269bda1c | 86 | .name = "mct_u232", |
18fcac35 | 87 | }, |
269bda1c | 88 | .description = "MCT U232", |
68e24113 | 89 | .id_table = id_table, |
1da177e4 LT |
90 | .num_ports = 1, |
91 | .open = mct_u232_open, | |
92 | .close = mct_u232_close, | |
335f8514 | 93 | .dtr_rts = mct_u232_dtr_rts, |
45b844df DP |
94 | .throttle = mct_u232_throttle, |
95 | .unthrottle = mct_u232_unthrottle, | |
1da177e4 | 96 | .read_int_callback = mct_u232_read_int_callback, |
1da177e4 LT |
97 | .set_termios = mct_u232_set_termios, |
98 | .break_ctl = mct_u232_break_ctl, | |
99 | .tiocmget = mct_u232_tiocmget, | |
100 | .tiocmset = mct_u232_tiocmset, | |
101 | .attach = mct_u232_startup, | |
f9c99bb8 | 102 | .release = mct_u232_release, |
7af75af2 VT |
103 | .ioctl = mct_u232_ioctl, |
104 | .get_icount = mct_u232_get_icount, | |
1da177e4 LT |
105 | }; |
106 | ||
4d2a7aff AS |
107 | static struct usb_serial_driver * const serial_drivers[] = { |
108 | &mct_u232_device, NULL | |
109 | }; | |
110 | ||
1da177e4 LT |
111 | struct mct_u232_private { |
112 | spinlock_t lock; | |
113 | unsigned int control_state; /* Modem Line Setting (TIOCM) */ | |
114 | unsigned char last_lcr; /* Line Control Register */ | |
115 | unsigned char last_lsr; /* Line Status Register */ | |
116 | unsigned char last_msr; /* Modem Status Register */ | |
45b844df | 117 | unsigned int rx_flags; /* Throttling flags */ |
7af75af2 VT |
118 | struct async_icount icount; |
119 | wait_queue_head_t msr_wait; /* for handling sleeping while waiting | |
120 | for msr change to happen */ | |
1da177e4 LT |
121 | }; |
122 | ||
45b844df DP |
123 | #define THROTTLED 0x01 |
124 | ||
1da177e4 LT |
125 | /* |
126 | * Handle vendor specific USB requests | |
127 | */ | |
128 | ||
129 | #define WDR_TIMEOUT 5000 /* default urb timeout */ | |
130 | ||
131 | /* | |
132 | * Later day 2.6.0-test kernels have new baud rates like B230400 which | |
133 | * we do not know how to support. We ignore them for the moment. | |
1da177e4 | 134 | */ |
e19b2560 AC |
135 | static int mct_u232_calculate_baud_rate(struct usb_serial *serial, |
136 | speed_t value, speed_t *result) | |
1da177e4 | 137 | { |
d0fab0dd AC |
138 | *result = value; |
139 | ||
1da177e4 | 140 | if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID |
e19b2560 | 141 | || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) { |
1da177e4 | 142 | switch (value) { |
e19b2560 AC |
143 | case 300: |
144 | return 0x01; | |
145 | case 600: | |
146 | return 0x02; /* this one not tested */ | |
147 | case 1200: | |
148 | return 0x03; | |
149 | case 2400: | |
150 | return 0x04; | |
151 | case 4800: | |
152 | return 0x06; | |
153 | case 9600: | |
154 | return 0x08; | |
155 | case 19200: | |
156 | return 0x09; | |
157 | case 38400: | |
158 | return 0x0a; | |
159 | case 57600: | |
160 | return 0x0b; | |
161 | case 115200: | |
162 | return 0x0c; | |
1da177e4 | 163 | default: |
d0fab0dd | 164 | *result = 9600; |
1da177e4 LT |
165 | return 0x08; |
166 | } | |
167 | } else { | |
d0fab0dd AC |
168 | /* FIXME: Can we use any divider - should we do |
169 | divider = 115200/value; | |
170 | real baud = 115200/divider */ | |
1da177e4 | 171 | switch (value) { |
b3aceb2b AM |
172 | case 300: break; |
173 | case 600: break; | |
174 | case 1200: break; | |
175 | case 2400: break; | |
176 | case 4800: break; | |
177 | case 9600: break; | |
178 | case 19200: break; | |
179 | case 38400: break; | |
180 | case 57600: break; | |
181 | case 115200: break; | |
182 | default: | |
b3aceb2b | 183 | value = 9600; |
d0fab0dd | 184 | *result = 9600; |
1da177e4 LT |
185 | } |
186 | return 115200/value; | |
187 | } | |
188 | } | |
189 | ||
95da310e AC |
190 | static int mct_u232_set_baud_rate(struct tty_struct *tty, |
191 | struct usb_serial *serial, struct usb_serial_port *port, speed_t value) | |
1da177e4 | 192 | { |
af2ac1a0 | 193 | unsigned int divisor; |
e19b2560 | 194 | int rc; |
af2ac1a0 | 195 | unsigned char *buf; |
e19b2560 AC |
196 | unsigned char cts_enable_byte = 0; |
197 | speed_t speed; | |
198 | ||
af2ac1a0 PZ |
199 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); |
200 | if (buf == NULL) | |
201 | return -ENOMEM; | |
e19b2560 | 202 | |
af2ac1a0 PZ |
203 | divisor = mct_u232_calculate_baud_rate(serial, value, &speed); |
204 | put_unaligned_le32(cpu_to_le32(divisor), buf); | |
e19b2560 AC |
205 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
206 | MCT_U232_SET_BAUD_RATE_REQUEST, | |
207 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 208 | 0, 0, buf, MCT_U232_SET_BAUD_RATE_SIZE, |
e19b2560 | 209 | WDR_TIMEOUT); |
d0fab0dd | 210 | if (rc < 0) /*FIXME: What value speed results */ |
194343d9 GKH |
211 | dev_err(&port->dev, "Set BAUD RATE %d failed (error = %d)\n", |
212 | value, rc); | |
d0fab0dd | 213 | else |
95da310e | 214 | tty_encode_baud_rate(tty, speed, speed); |
4a770cca | 215 | dev_dbg(&port->dev, "set_baud_rate: value: 0x%x, divisor: 0x%x\n", value, divisor); |
1da177e4 LT |
216 | |
217 | /* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which | |
218 | always sends two extra USB 'device request' messages after the | |
219 | 'baud rate change' message. The actual functionality of the | |
220 | request codes in these messages is not fully understood but these | |
221 | particular codes are never seen in any operation besides a baud | |
45b844df DP |
222 | rate change. Both of these messages send a single byte of data. |
223 | In the first message, the value of this byte is always zero. | |
224 | ||
225 | The second message has been determined experimentally to control | |
226 | whether data will be transmitted to a device which is not asserting | |
227 | the 'CTS' signal. If the second message's data byte is zero, data | |
228 | will be transmitted even if 'CTS' is not asserted (i.e. no hardware | |
e19b2560 AC |
229 | flow control). if the second message's data byte is nonzero (a |
230 | value of 1 is used by this driver), data will not be transmitted to | |
231 | a device which is not asserting 'CTS'. | |
45b844df | 232 | */ |
1da177e4 | 233 | |
af2ac1a0 | 234 | buf[0] = 0; |
1da177e4 | 235 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
e19b2560 AC |
236 | MCT_U232_SET_UNKNOWN1_REQUEST, |
237 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 238 | 0, 0, buf, MCT_U232_SET_UNKNOWN1_SIZE, |
e19b2560 | 239 | WDR_TIMEOUT); |
1da177e4 | 240 | if (rc < 0) |
194343d9 GKH |
241 | dev_err(&port->dev, "Sending USB device request code %d " |
242 | "failed (error = %d)\n", MCT_U232_SET_UNKNOWN1_REQUEST, | |
243 | rc); | |
1da177e4 | 244 | |
e19b2560 | 245 | if (port && C_CRTSCTS(tty)) |
45b844df | 246 | cts_enable_byte = 1; |
45b844df | 247 | |
4a770cca GKH |
248 | dev_dbg(&port->dev, "set_baud_rate: send second control message, data = %02X\n", |
249 | cts_enable_byte); | |
af2ac1a0 | 250 | buf[0] = cts_enable_byte; |
1da177e4 | 251 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
e19b2560 AC |
252 | MCT_U232_SET_CTS_REQUEST, |
253 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 254 | 0, 0, buf, MCT_U232_SET_CTS_SIZE, |
e19b2560 | 255 | WDR_TIMEOUT); |
1da177e4 | 256 | if (rc < 0) |
194343d9 GKH |
257 | dev_err(&port->dev, "Sending USB device request code %d " |
258 | "failed (error = %d)\n", MCT_U232_SET_CTS_REQUEST, rc); | |
1da177e4 | 259 | |
af2ac1a0 | 260 | kfree(buf); |
e19b2560 | 261 | return rc; |
1da177e4 LT |
262 | } /* mct_u232_set_baud_rate */ |
263 | ||
4a770cca GKH |
264 | static int mct_u232_set_line_ctrl(struct usb_serial_port *port, |
265 | unsigned char lcr) | |
1da177e4 | 266 | { |
e19b2560 | 267 | int rc; |
af2ac1a0 PZ |
268 | unsigned char *buf; |
269 | ||
270 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
271 | if (buf == NULL) | |
272 | return -ENOMEM; | |
273 | ||
274 | buf[0] = lcr; | |
4a770cca | 275 | rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), |
e19b2560 AC |
276 | MCT_U232_SET_LINE_CTRL_REQUEST, |
277 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 278 | 0, 0, buf, MCT_U232_SET_LINE_CTRL_SIZE, |
e19b2560 | 279 | WDR_TIMEOUT); |
1da177e4 | 280 | if (rc < 0) |
4a770cca GKH |
281 | dev_err(&port->dev, "Set LINE CTRL 0x%x failed (error = %d)\n", lcr, rc); |
282 | dev_dbg(&port->dev, "set_line_ctrl: 0x%x\n", lcr); | |
af2ac1a0 | 283 | kfree(buf); |
e19b2560 | 284 | return rc; |
1da177e4 LT |
285 | } /* mct_u232_set_line_ctrl */ |
286 | ||
4a770cca | 287 | static int mct_u232_set_modem_ctrl(struct usb_serial_port *port, |
1da177e4 LT |
288 | unsigned int control_state) |
289 | { | |
e19b2560 | 290 | int rc; |
af2ac1a0 PZ |
291 | unsigned char mcr; |
292 | unsigned char *buf; | |
293 | ||
294 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
295 | if (buf == NULL) | |
296 | return -ENOMEM; | |
1da177e4 | 297 | |
af2ac1a0 | 298 | mcr = MCT_U232_MCR_NONE; |
1da177e4 LT |
299 | if (control_state & TIOCM_DTR) |
300 | mcr |= MCT_U232_MCR_DTR; | |
301 | if (control_state & TIOCM_RTS) | |
302 | mcr |= MCT_U232_MCR_RTS; | |
303 | ||
af2ac1a0 | 304 | buf[0] = mcr; |
4a770cca | 305 | rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), |
e19b2560 AC |
306 | MCT_U232_SET_MODEM_CTRL_REQUEST, |
307 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 308 | 0, 0, buf, MCT_U232_SET_MODEM_CTRL_SIZE, |
e19b2560 | 309 | WDR_TIMEOUT); |
1aa3c63c AC |
310 | kfree(buf); |
311 | ||
4a770cca | 312 | dev_dbg(&port->dev, "set_modem_ctrl: state=0x%x ==> mcr=0x%x\n", control_state, mcr); |
1da177e4 | 313 | |
1aa3c63c | 314 | if (rc < 0) { |
4a770cca | 315 | dev_err(&port->dev, "Set MODEM CTRL 0x%x failed (error = %d)\n", mcr, rc); |
1aa3c63c AC |
316 | return rc; |
317 | } | |
318 | return 0; | |
1da177e4 LT |
319 | } /* mct_u232_set_modem_ctrl */ |
320 | ||
4a770cca GKH |
321 | static int mct_u232_get_modem_stat(struct usb_serial_port *port, |
322 | unsigned char *msr) | |
1da177e4 | 323 | { |
e19b2560 | 324 | int rc; |
af2ac1a0 PZ |
325 | unsigned char *buf; |
326 | ||
327 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
328 | if (buf == NULL) { | |
329 | *msr = 0; | |
330 | return -ENOMEM; | |
331 | } | |
4a770cca | 332 | rc = usb_control_msg(port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), |
e19b2560 AC |
333 | MCT_U232_GET_MODEM_STAT_REQUEST, |
334 | MCT_U232_GET_REQUEST_TYPE, | |
af2ac1a0 | 335 | 0, 0, buf, MCT_U232_GET_MODEM_STAT_SIZE, |
e19b2560 | 336 | WDR_TIMEOUT); |
1da177e4 | 337 | if (rc < 0) { |
4a770cca | 338 | dev_err(&port->dev, "Get MODEM STATus failed (error = %d)\n", rc); |
1da177e4 | 339 | *msr = 0; |
af2ac1a0 PZ |
340 | } else { |
341 | *msr = buf[0]; | |
1da177e4 | 342 | } |
4a770cca | 343 | dev_dbg(&port->dev, "get_modem_stat: 0x%x\n", *msr); |
af2ac1a0 | 344 | kfree(buf); |
e19b2560 | 345 | return rc; |
1da177e4 LT |
346 | } /* mct_u232_get_modem_stat */ |
347 | ||
7af75af2 VT |
348 | static void mct_u232_msr_to_icount(struct async_icount *icount, |
349 | unsigned char msr) | |
350 | { | |
351 | /* Translate Control Line states */ | |
352 | if (msr & MCT_U232_MSR_DDSR) | |
353 | icount->dsr++; | |
354 | if (msr & MCT_U232_MSR_DCTS) | |
355 | icount->cts++; | |
356 | if (msr & MCT_U232_MSR_DRI) | |
357 | icount->rng++; | |
358 | if (msr & MCT_U232_MSR_DCD) | |
359 | icount->dcd++; | |
360 | } /* mct_u232_msr_to_icount */ | |
361 | ||
4a770cca GKH |
362 | static void mct_u232_msr_to_state(struct usb_serial_port *port, |
363 | unsigned int *control_state, unsigned char msr) | |
1da177e4 | 364 | { |
e19b2560 | 365 | /* Translate Control Line states */ |
1da177e4 LT |
366 | if (msr & MCT_U232_MSR_DSR) |
367 | *control_state |= TIOCM_DSR; | |
368 | else | |
369 | *control_state &= ~TIOCM_DSR; | |
370 | if (msr & MCT_U232_MSR_CTS) | |
371 | *control_state |= TIOCM_CTS; | |
372 | else | |
373 | *control_state &= ~TIOCM_CTS; | |
374 | if (msr & MCT_U232_MSR_RI) | |
375 | *control_state |= TIOCM_RI; | |
376 | else | |
377 | *control_state &= ~TIOCM_RI; | |
378 | if (msr & MCT_U232_MSR_CD) | |
379 | *control_state |= TIOCM_CD; | |
380 | else | |
381 | *control_state &= ~TIOCM_CD; | |
4a770cca | 382 | dev_dbg(&port->dev, "msr_to_state: msr=0x%x ==> state=0x%x\n", msr, *control_state); |
1da177e4 LT |
383 | } /* mct_u232_msr_to_state */ |
384 | ||
385 | /* | |
386 | * Driver's tty interface functions | |
387 | */ | |
388 | ||
e19b2560 | 389 | static int mct_u232_startup(struct usb_serial *serial) |
1da177e4 LT |
390 | { |
391 | struct mct_u232_private *priv; | |
392 | struct usb_serial_port *port, *rport; | |
393 | ||
80b6ca48 | 394 | priv = kzalloc(sizeof(struct mct_u232_private), GFP_KERNEL); |
1da177e4 LT |
395 | if (!priv) |
396 | return -ENOMEM; | |
1da177e4 | 397 | spin_lock_init(&priv->lock); |
7af75af2 | 398 | init_waitqueue_head(&priv->msr_wait); |
1da177e4 LT |
399 | usb_set_serial_port_data(serial->port[0], priv); |
400 | ||
401 | init_waitqueue_head(&serial->port[0]->write_wait); | |
402 | ||
403 | /* Puh, that's dirty */ | |
404 | port = serial->port[0]; | |
405 | rport = serial->port[1]; | |
73135bb9 MK |
406 | /* No unlinking, it wasn't submitted yet. */ |
407 | usb_free_urb(port->read_urb); | |
1da177e4 LT |
408 | port->read_urb = rport->interrupt_in_urb; |
409 | rport->interrupt_in_urb = NULL; | |
410 | port->read_urb->context = port; | |
411 | ||
e19b2560 | 412 | return 0; |
1da177e4 LT |
413 | } /* mct_u232_startup */ |
414 | ||
415 | ||
f9c99bb8 | 416 | static void mct_u232_release(struct usb_serial *serial) |
1da177e4 LT |
417 | { |
418 | struct mct_u232_private *priv; | |
419 | int i; | |
e19b2560 | 420 | |
e19b2560 | 421 | for (i = 0; i < serial->num_ports; ++i) { |
1da177e4 LT |
422 | /* My special items, the standard routines free my urbs */ |
423 | priv = usb_get_serial_port_data(serial->port[i]); | |
f9c99bb8 | 424 | kfree(priv); |
1da177e4 | 425 | } |
f9c99bb8 | 426 | } /* mct_u232_release */ |
1da177e4 | 427 | |
a509a7e4 | 428 | static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
429 | { |
430 | struct usb_serial *serial = port->serial; | |
431 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
432 | int retval = 0; | |
433 | unsigned int control_state; | |
434 | unsigned long flags; | |
435 | unsigned char last_lcr; | |
436 | unsigned char last_msr; | |
437 | ||
1da177e4 LT |
438 | /* Compensate for a hardware bug: although the Sitecom U232-P25 |
439 | * device reports a maximum output packet size of 32 bytes, | |
440 | * it seems to be able to accept only 16 bytes (and that's what | |
441 | * SniffUSB says too...) | |
442 | */ | |
e19b2560 AC |
443 | if (le16_to_cpu(serial->dev->descriptor.idProduct) |
444 | == MCT_U232_SITECOM_PID) | |
1da177e4 LT |
445 | port->bulk_out_size = 16; |
446 | ||
e19b2560 | 447 | /* Do a defined restart: the normal serial device seems to |
1da177e4 LT |
448 | * always turn on DTR and RTS here, so do the same. I'm not |
449 | * sure if this is really necessary. But it should not harm | |
450 | * either. | |
451 | */ | |
452 | spin_lock_irqsave(&priv->lock, flags); | |
adc8d746 | 453 | if (tty && (tty->termios.c_cflag & CBAUD)) |
1da177e4 LT |
454 | priv->control_state = TIOCM_DTR | TIOCM_RTS; |
455 | else | |
456 | priv->control_state = 0; | |
e19b2560 AC |
457 | |
458 | priv->last_lcr = (MCT_U232_DATA_BITS_8 | | |
1da177e4 LT |
459 | MCT_U232_PARITY_NONE | |
460 | MCT_U232_STOP_BITS_1); | |
461 | control_state = priv->control_state; | |
462 | last_lcr = priv->last_lcr; | |
463 | spin_unlock_irqrestore(&priv->lock, flags); | |
4a770cca GKH |
464 | mct_u232_set_modem_ctrl(port, control_state); |
465 | mct_u232_set_line_ctrl(port, last_lcr); | |
1da177e4 LT |
466 | |
467 | /* Read modem status and update control state */ | |
4a770cca | 468 | mct_u232_get_modem_stat(port, &last_msr); |
1da177e4 LT |
469 | spin_lock_irqsave(&priv->lock, flags); |
470 | priv->last_msr = last_msr; | |
4a770cca | 471 | mct_u232_msr_to_state(port, &priv->control_state, priv->last_msr); |
1da177e4 LT |
472 | spin_unlock_irqrestore(&priv->lock, flags); |
473 | ||
1da177e4 LT |
474 | retval = usb_submit_urb(port->read_urb, GFP_KERNEL); |
475 | if (retval) { | |
194343d9 GKH |
476 | dev_err(&port->dev, |
477 | "usb_submit_urb(read bulk) failed pipe 0x%x err %d\n", | |
478 | port->read_urb->pipe, retval); | |
2f007de2 | 479 | goto error; |
1da177e4 LT |
480 | } |
481 | ||
1da177e4 | 482 | retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
2f007de2 ON |
483 | if (retval) { |
484 | usb_kill_urb(port->read_urb); | |
194343d9 GKH |
485 | dev_err(&port->dev, |
486 | "usb_submit_urb(read int) failed pipe 0x%x err %d", | |
487 | port->interrupt_in_urb->pipe, retval); | |
2f007de2 ON |
488 | goto error; |
489 | } | |
1da177e4 | 490 | return 0; |
2f007de2 ON |
491 | |
492 | error: | |
493 | return retval; | |
1da177e4 LT |
494 | } /* mct_u232_open */ |
495 | ||
335f8514 | 496 | static void mct_u232_dtr_rts(struct usb_serial_port *port, int on) |
1da177e4 | 497 | { |
45b844df DP |
498 | unsigned int control_state; |
499 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
1da177e4 | 500 | |
335f8514 AC |
501 | mutex_lock(&port->serial->disc_mutex); |
502 | if (!port->serial->disconnected) { | |
503 | /* drop DTR and RTS */ | |
504 | spin_lock_irq(&priv->lock); | |
505 | if (on) | |
506 | priv->control_state |= TIOCM_DTR | TIOCM_RTS; | |
507 | else | |
e33fe4d8 | 508 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); |
335f8514 AC |
509 | control_state = priv->control_state; |
510 | spin_unlock_irq(&priv->lock); | |
4a770cca | 511 | mct_u232_set_modem_ctrl(port, control_state); |
45b844df | 512 | } |
335f8514 AC |
513 | mutex_unlock(&port->serial->disc_mutex); |
514 | } | |
45b844df | 515 | |
335f8514 AC |
516 | static void mct_u232_close(struct usb_serial_port *port) |
517 | { | |
92ca0dc5 JH |
518 | if (port->serial->dev) { |
519 | /* shutdown our urbs */ | |
520 | usb_kill_urb(port->write_urb); | |
521 | usb_kill_urb(port->read_urb); | |
1da177e4 | 522 | usb_kill_urb(port->interrupt_in_urb); |
92ca0dc5 | 523 | } |
1da177e4 LT |
524 | } /* mct_u232_close */ |
525 | ||
526 | ||
e19b2560 | 527 | static void mct_u232_read_int_callback(struct urb *urb) |
1da177e4 | 528 | { |
cdc97792 | 529 | struct usb_serial_port *port = urb->context; |
1da177e4 | 530 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
1da177e4 LT |
531 | struct tty_struct *tty; |
532 | unsigned char *data = urb->transfer_buffer; | |
e96da398 GKH |
533 | int retval; |
534 | int status = urb->status; | |
1da177e4 LT |
535 | unsigned long flags; |
536 | ||
e96da398 | 537 | switch (status) { |
1da177e4 LT |
538 | case 0: |
539 | /* success */ | |
540 | break; | |
541 | case -ECONNRESET: | |
542 | case -ENOENT: | |
543 | case -ESHUTDOWN: | |
544 | /* this urb is terminated, clean up */ | |
4a770cca GKH |
545 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
546 | __func__, status); | |
1da177e4 LT |
547 | return; |
548 | default: | |
4a770cca GKH |
549 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
550 | __func__, status); | |
1da177e4 LT |
551 | goto exit; |
552 | } | |
553 | ||
59d33f2f | 554 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
1da177e4 LT |
555 | |
556 | /* | |
557 | * Work-a-round: handle the 'usual' bulk-in pipe here | |
558 | */ | |
559 | if (urb->transfer_buffer_length > 2) { | |
1da177e4 | 560 | if (urb->actual_length) { |
054f2346 JS |
561 | tty = tty_port_tty_get(&port->port); |
562 | if (tty) { | |
563 | tty_insert_flip_string(tty, data, | |
564 | urb->actual_length); | |
565 | tty_flip_buffer_push(tty); | |
566 | } | |
4a90f09b | 567 | tty_kref_put(tty); |
1da177e4 LT |
568 | } |
569 | goto exit; | |
570 | } | |
e19b2560 | 571 | |
1da177e4 LT |
572 | /* |
573 | * The interrupt-in pipe signals exceptional conditions (modem line | |
574 | * signal changes and errors). data[0] holds MSR, data[1] holds LSR. | |
575 | */ | |
576 | spin_lock_irqsave(&priv->lock, flags); | |
577 | priv->last_msr = data[MCT_U232_MSR_INDEX]; | |
e19b2560 | 578 | |
1da177e4 | 579 | /* Record Control Line states */ |
4a770cca | 580 | mct_u232_msr_to_state(port, &priv->control_state, priv->last_msr); |
1da177e4 | 581 | |
7af75af2 VT |
582 | mct_u232_msr_to_icount(&priv->icount, priv->last_msr); |
583 | ||
1da177e4 | 584 | #if 0 |
e19b2560 | 585 | /* Not yet handled. See belkin_sa.c for further information */ |
1da177e4 LT |
586 | /* Now to report any errors */ |
587 | priv->last_lsr = data[MCT_U232_LSR_INDEX]; | |
588 | /* | |
589 | * fill in the flip buffer here, but I do not know the relation | |
590 | * to the current/next receive buffer or characters. I need | |
591 | * to look in to this before committing any code. | |
592 | */ | |
593 | if (priv->last_lsr & MCT_U232_LSR_ERR) { | |
4a90f09b | 594 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
595 | /* Overrun Error */ |
596 | if (priv->last_lsr & MCT_U232_LSR_OE) { | |
597 | } | |
598 | /* Parity Error */ | |
599 | if (priv->last_lsr & MCT_U232_LSR_PE) { | |
600 | } | |
601 | /* Framing Error */ | |
602 | if (priv->last_lsr & MCT_U232_LSR_FE) { | |
603 | } | |
604 | /* Break Indicator */ | |
605 | if (priv->last_lsr & MCT_U232_LSR_BI) { | |
606 | } | |
4a90f09b | 607 | tty_kref_put(tty); |
1da177e4 LT |
608 | } |
609 | #endif | |
7af75af2 | 610 | wake_up_interruptible(&priv->msr_wait); |
1da177e4 LT |
611 | spin_unlock_irqrestore(&priv->lock, flags); |
612 | exit: | |
e19b2560 | 613 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
e96da398 | 614 | if (retval) |
194343d9 GKH |
615 | dev_err(&port->dev, |
616 | "%s - usb_submit_urb failed with result %d\n", | |
617 | __func__, retval); | |
1da177e4 LT |
618 | } /* mct_u232_read_int_callback */ |
619 | ||
e19b2560 AC |
620 | static void mct_u232_set_termios(struct tty_struct *tty, |
621 | struct usb_serial_port *port, | |
622 | struct ktermios *old_termios) | |
1da177e4 LT |
623 | { |
624 | struct usb_serial *serial = port->serial; | |
625 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
adc8d746 | 626 | struct ktermios *termios = &tty->termios; |
d0fab0dd | 627 | unsigned int cflag = termios->c_cflag; |
1da177e4 LT |
628 | unsigned int old_cflag = old_termios->c_cflag; |
629 | unsigned long flags; | |
45b844df | 630 | unsigned int control_state; |
1da177e4 LT |
631 | unsigned char last_lcr; |
632 | ||
633 | /* get a local copy of the current port settings */ | |
634 | spin_lock_irqsave(&priv->lock, flags); | |
635 | control_state = priv->control_state; | |
636 | spin_unlock_irqrestore(&priv->lock, flags); | |
637 | last_lcr = 0; | |
638 | ||
639 | /* | |
640 | * Update baud rate. | |
641 | * Do not attempt to cache old rates and skip settings, | |
642 | * disconnects screw such tricks up completely. | |
643 | * Premature optimization is the root of all evil. | |
644 | */ | |
645 | ||
e19b2560 | 646 | /* reassert DTR and RTS on transition from B0 */ |
1da177e4 | 647 | if ((old_cflag & CBAUD) == B0) { |
4a770cca | 648 | dev_dbg(&port->dev, "%s: baud was B0\n", __func__); |
45b844df | 649 | control_state |= TIOCM_DTR | TIOCM_RTS; |
4a770cca | 650 | mct_u232_set_modem_ctrl(port, control_state); |
1da177e4 LT |
651 | } |
652 | ||
95da310e | 653 | mct_u232_set_baud_rate(tty, serial, port, tty_get_baud_rate(tty)); |
1da177e4 | 654 | |
e19b2560 | 655 | if ((cflag & CBAUD) == B0) { |
4a770cca | 656 | dev_dbg(&port->dev, "%s: baud is B0\n", __func__); |
1da177e4 LT |
657 | /* Drop RTS and DTR */ |
658 | control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
4a770cca | 659 | mct_u232_set_modem_ctrl(port, control_state); |
1da177e4 LT |
660 | } |
661 | ||
662 | /* | |
663 | * Update line control register (LCR) | |
664 | */ | |
665 | ||
666 | /* set the parity */ | |
667 | if (cflag & PARENB) | |
668 | last_lcr |= (cflag & PARODD) ? | |
669 | MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; | |
670 | else | |
671 | last_lcr |= MCT_U232_PARITY_NONE; | |
672 | ||
673 | /* set the number of data bits */ | |
674 | switch (cflag & CSIZE) { | |
675 | case CS5: | |
676 | last_lcr |= MCT_U232_DATA_BITS_5; break; | |
677 | case CS6: | |
678 | last_lcr |= MCT_U232_DATA_BITS_6; break; | |
679 | case CS7: | |
680 | last_lcr |= MCT_U232_DATA_BITS_7; break; | |
681 | case CS8: | |
682 | last_lcr |= MCT_U232_DATA_BITS_8; break; | |
683 | default: | |
194343d9 GKH |
684 | dev_err(&port->dev, |
685 | "CSIZE was not CS5-CS8, using default of 8\n"); | |
1da177e4 LT |
686 | last_lcr |= MCT_U232_DATA_BITS_8; |
687 | break; | |
688 | } | |
689 | ||
d0fab0dd AC |
690 | termios->c_cflag &= ~CMSPAR; |
691 | ||
1da177e4 LT |
692 | /* set the number of stop bits */ |
693 | last_lcr |= (cflag & CSTOPB) ? | |
694 | MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; | |
695 | ||
4a770cca | 696 | mct_u232_set_line_ctrl(port, last_lcr); |
1da177e4 | 697 | |
1da177e4 LT |
698 | /* save off the modified port settings */ |
699 | spin_lock_irqsave(&priv->lock, flags); | |
700 | priv->control_state = control_state; | |
701 | priv->last_lcr = last_lcr; | |
702 | spin_unlock_irqrestore(&priv->lock, flags); | |
703 | } /* mct_u232_set_termios */ | |
704 | ||
95da310e | 705 | static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 706 | { |
95da310e | 707 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
708 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
709 | unsigned char lcr; | |
710 | unsigned long flags; | |
711 | ||
1da177e4 LT |
712 | spin_lock_irqsave(&priv->lock, flags); |
713 | lcr = priv->last_lcr; | |
1da177e4 LT |
714 | |
715 | if (break_state) | |
716 | lcr |= MCT_U232_SET_BREAK; | |
6b447f04 | 717 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 718 | |
4a770cca | 719 | mct_u232_set_line_ctrl(port, lcr); |
1da177e4 LT |
720 | } /* mct_u232_break_ctl */ |
721 | ||
722 | ||
60b33c13 | 723 | static int mct_u232_tiocmget(struct tty_struct *tty) |
1da177e4 | 724 | { |
95da310e | 725 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
726 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
727 | unsigned int control_state; | |
728 | unsigned long flags; | |
e19b2560 | 729 | |
1da177e4 LT |
730 | spin_lock_irqsave(&priv->lock, flags); |
731 | control_state = priv->control_state; | |
732 | spin_unlock_irqrestore(&priv->lock, flags); | |
733 | ||
734 | return control_state; | |
735 | } | |
736 | ||
20b9d177 | 737 | static int mct_u232_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
738 | unsigned int set, unsigned int clear) |
739 | { | |
95da310e | 740 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
741 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
742 | unsigned int control_state; | |
743 | unsigned long flags; | |
e19b2560 | 744 | |
1da177e4 LT |
745 | spin_lock_irqsave(&priv->lock, flags); |
746 | control_state = priv->control_state; | |
747 | ||
748 | if (set & TIOCM_RTS) | |
749 | control_state |= TIOCM_RTS; | |
750 | if (set & TIOCM_DTR) | |
751 | control_state |= TIOCM_DTR; | |
752 | if (clear & TIOCM_RTS) | |
753 | control_state &= ~TIOCM_RTS; | |
754 | if (clear & TIOCM_DTR) | |
755 | control_state &= ~TIOCM_DTR; | |
756 | ||
757 | priv->control_state = control_state; | |
758 | spin_unlock_irqrestore(&priv->lock, flags); | |
4a770cca | 759 | return mct_u232_set_modem_ctrl(port, control_state); |
1da177e4 LT |
760 | } |
761 | ||
95da310e | 762 | static void mct_u232_throttle(struct tty_struct *tty) |
45b844df | 763 | { |
95da310e | 764 | struct usb_serial_port *port = tty->driver_data; |
45b844df | 765 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
45b844df | 766 | unsigned int control_state; |
45b844df | 767 | |
63832515 | 768 | spin_lock_irq(&priv->lock); |
45b844df DP |
769 | priv->rx_flags |= THROTTLED; |
770 | if (C_CRTSCTS(tty)) { | |
95da310e AC |
771 | priv->control_state &= ~TIOCM_RTS; |
772 | control_state = priv->control_state; | |
63832515 | 773 | spin_unlock_irq(&priv->lock); |
4a770cca | 774 | mct_u232_set_modem_ctrl(port, control_state); |
45b844df | 775 | } else { |
63832515 | 776 | spin_unlock_irq(&priv->lock); |
45b844df DP |
777 | } |
778 | } | |
779 | ||
95da310e | 780 | static void mct_u232_unthrottle(struct tty_struct *tty) |
45b844df | 781 | { |
95da310e | 782 | struct usb_serial_port *port = tty->driver_data; |
45b844df | 783 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
45b844df | 784 | unsigned int control_state; |
45b844df | 785 | |
63832515 | 786 | spin_lock_irq(&priv->lock); |
45b844df | 787 | if ((priv->rx_flags & THROTTLED) && C_CRTSCTS(tty)) { |
95da310e AC |
788 | priv->rx_flags &= ~THROTTLED; |
789 | priv->control_state |= TIOCM_RTS; | |
790 | control_state = priv->control_state; | |
63832515 | 791 | spin_unlock_irq(&priv->lock); |
4a770cca | 792 | mct_u232_set_modem_ctrl(port, control_state); |
45b844df | 793 | } else { |
63832515 | 794 | spin_unlock_irq(&priv->lock); |
45b844df DP |
795 | } |
796 | } | |
1da177e4 | 797 | |
4acfaf82 | 798 | static int mct_u232_ioctl(struct tty_struct *tty, |
7af75af2 VT |
799 | unsigned int cmd, unsigned long arg) |
800 | { | |
801 | DEFINE_WAIT(wait); | |
802 | struct usb_serial_port *port = tty->driver_data; | |
803 | struct mct_u232_private *mct_u232_port = usb_get_serial_port_data(port); | |
804 | struct async_icount cnow, cprev; | |
805 | unsigned long flags; | |
806 | ||
4a770cca | 807 | dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); |
7af75af2 VT |
808 | |
809 | switch (cmd) { | |
810 | ||
811 | case TIOCMIWAIT: | |
812 | ||
4a770cca | 813 | dev_dbg(&port->dev, "%s TIOCMIWAIT", __func__); |
7af75af2 VT |
814 | |
815 | spin_lock_irqsave(&mct_u232_port->lock, flags); | |
816 | cprev = mct_u232_port->icount; | |
817 | spin_unlock_irqrestore(&mct_u232_port->lock, flags); | |
818 | for ( ; ; ) { | |
819 | prepare_to_wait(&mct_u232_port->msr_wait, | |
820 | &wait, TASK_INTERRUPTIBLE); | |
821 | schedule(); | |
822 | finish_wait(&mct_u232_port->msr_wait, &wait); | |
823 | /* see if a signal did it */ | |
824 | if (signal_pending(current)) | |
825 | return -ERESTARTSYS; | |
826 | spin_lock_irqsave(&mct_u232_port->lock, flags); | |
827 | cnow = mct_u232_port->icount; | |
828 | spin_unlock_irqrestore(&mct_u232_port->lock, flags); | |
829 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
830 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
831 | return -EIO; /* no change => error */ | |
832 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
833 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
834 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
835 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { | |
836 | return 0; | |
837 | } | |
838 | cprev = cnow; | |
839 | } | |
840 | ||
841 | } | |
842 | return -ENOIOCTLCMD; | |
843 | } | |
844 | ||
845 | static int mct_u232_get_icount(struct tty_struct *tty, | |
846 | struct serial_icounter_struct *icount) | |
847 | { | |
848 | struct usb_serial_port *port = tty->driver_data; | |
849 | struct mct_u232_private *mct_u232_port = usb_get_serial_port_data(port); | |
850 | struct async_icount *ic = &mct_u232_port->icount; | |
851 | unsigned long flags; | |
852 | ||
853 | spin_lock_irqsave(&mct_u232_port->lock, flags); | |
854 | ||
855 | icount->cts = ic->cts; | |
856 | icount->dsr = ic->dsr; | |
857 | icount->rng = ic->rng; | |
858 | icount->dcd = ic->dcd; | |
859 | icount->rx = ic->rx; | |
860 | icount->tx = ic->tx; | |
861 | icount->frame = ic->frame; | |
862 | icount->overrun = ic->overrun; | |
863 | icount->parity = ic->parity; | |
864 | icount->brk = ic->brk; | |
865 | icount->buf_overrun = ic->buf_overrun; | |
866 | ||
867 | spin_unlock_irqrestore(&mct_u232_port->lock, flags); | |
868 | ||
4a770cca GKH |
869 | dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", |
870 | __func__, icount->rx, icount->tx); | |
7af75af2 VT |
871 | return 0; |
872 | } | |
873 | ||
68e24113 | 874 | module_usb_serial_driver(serial_drivers, id_table); |
1da177e4 | 875 | |
e19b2560 AC |
876 | MODULE_AUTHOR(DRIVER_AUTHOR); |
877 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 878 | MODULE_LICENSE("GPL"); |