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> | |
1da177e4 LT |
26 | #include <linux/slab.h> |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_driver.h> | |
29 | #include <linux/tty_flip.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/spinlock.h> | |
e19b2560 | 32 | #include <linux/uaccess.h> |
af2ac1a0 | 33 | #include <asm/unaligned.h> |
1da177e4 | 34 | #include <linux/usb.h> |
a969888c | 35 | #include <linux/usb/serial.h> |
7af75af2 | 36 | #include <linux/serial.h> |
1da177e4 LT |
37 | #include "mct_u232.h" |
38 | ||
1da177e4 LT |
39 | #define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>" |
40 | #define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver" | |
41 | ||
1da177e4 LT |
42 | /* |
43 | * Function prototypes | |
44 | */ | |
a8f2ae7a JH |
45 | static int mct_u232_port_probe(struct usb_serial_port *port); |
46 | static int mct_u232_port_remove(struct usb_serial_port *remove); | |
a509a7e4 | 47 | static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
48 | static void mct_u232_close(struct usb_serial_port *port); |
49 | static void mct_u232_dtr_rts(struct usb_serial_port *port, int on); | |
e19b2560 AC |
50 | static void mct_u232_read_int_callback(struct urb *urb); |
51 | static void mct_u232_set_termios(struct tty_struct *tty, | |
52 | struct usb_serial_port *port, struct ktermios *old); | |
53 | static void mct_u232_break_ctl(struct tty_struct *tty, int break_state); | |
60b33c13 | 54 | static int mct_u232_tiocmget(struct tty_struct *tty); |
20b9d177 | 55 | static int mct_u232_tiocmset(struct tty_struct *tty, |
e19b2560 AC |
56 | unsigned int set, unsigned int clear); |
57 | static void mct_u232_throttle(struct tty_struct *tty); | |
58 | static void mct_u232_unthrottle(struct tty_struct *tty); | |
45b844df DP |
59 | |
60 | ||
1da177e4 LT |
61 | /* |
62 | * All of the device info needed for the MCT USB-RS232 converter. | |
63 | */ | |
68e24113 | 64 | static const struct usb_device_id id_table[] = { |
1da177e4 LT |
65 | { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) }, |
66 | { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) }, | |
67 | { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) }, | |
68 | { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) }, | |
69 | { } /* Terminating entry */ | |
70 | }; | |
68e24113 | 71 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 72 | |
ea65370d | 73 | static struct usb_serial_driver mct_u232_device = { |
18fcac35 GKH |
74 | .driver = { |
75 | .owner = THIS_MODULE, | |
269bda1c | 76 | .name = "mct_u232", |
18fcac35 | 77 | }, |
269bda1c | 78 | .description = "MCT U232", |
68e24113 | 79 | .id_table = id_table, |
1da177e4 LT |
80 | .num_ports = 1, |
81 | .open = mct_u232_open, | |
82 | .close = mct_u232_close, | |
335f8514 | 83 | .dtr_rts = mct_u232_dtr_rts, |
45b844df DP |
84 | .throttle = mct_u232_throttle, |
85 | .unthrottle = mct_u232_unthrottle, | |
1da177e4 | 86 | .read_int_callback = mct_u232_read_int_callback, |
1da177e4 LT |
87 | .set_termios = mct_u232_set_termios, |
88 | .break_ctl = mct_u232_break_ctl, | |
89 | .tiocmget = mct_u232_tiocmget, | |
90 | .tiocmset = mct_u232_tiocmset, | |
128434ab | 91 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
a8f2ae7a JH |
92 | .port_probe = mct_u232_port_probe, |
93 | .port_remove = mct_u232_port_remove, | |
468c740e | 94 | .get_icount = usb_serial_generic_get_icount, |
1da177e4 LT |
95 | }; |
96 | ||
4d2a7aff AS |
97 | static struct usb_serial_driver * const serial_drivers[] = { |
98 | &mct_u232_device, NULL | |
99 | }; | |
100 | ||
1da177e4 | 101 | struct mct_u232_private { |
35807187 | 102 | struct urb *read_urb; |
1da177e4 LT |
103 | spinlock_t lock; |
104 | unsigned int control_state; /* Modem Line Setting (TIOCM) */ | |
105 | unsigned char last_lcr; /* Line Control Register */ | |
106 | unsigned char last_lsr; /* Line Status Register */ | |
107 | unsigned char last_msr; /* Modem Status Register */ | |
45b844df | 108 | unsigned int rx_flags; /* Throttling flags */ |
1da177e4 LT |
109 | }; |
110 | ||
45b844df DP |
111 | #define THROTTLED 0x01 |
112 | ||
1da177e4 LT |
113 | /* |
114 | * Handle vendor specific USB requests | |
115 | */ | |
116 | ||
117 | #define WDR_TIMEOUT 5000 /* default urb timeout */ | |
118 | ||
119 | /* | |
120 | * Later day 2.6.0-test kernels have new baud rates like B230400 which | |
121 | * we do not know how to support. We ignore them for the moment. | |
1da177e4 | 122 | */ |
e19b2560 AC |
123 | static int mct_u232_calculate_baud_rate(struct usb_serial *serial, |
124 | speed_t value, speed_t *result) | |
1da177e4 | 125 | { |
d0fab0dd AC |
126 | *result = value; |
127 | ||
1da177e4 | 128 | if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID |
e19b2560 | 129 | || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) { |
1da177e4 | 130 | switch (value) { |
e19b2560 AC |
131 | case 300: |
132 | return 0x01; | |
133 | case 600: | |
134 | return 0x02; /* this one not tested */ | |
135 | case 1200: | |
136 | return 0x03; | |
137 | case 2400: | |
138 | return 0x04; | |
139 | case 4800: | |
140 | return 0x06; | |
141 | case 9600: | |
142 | return 0x08; | |
143 | case 19200: | |
144 | return 0x09; | |
145 | case 38400: | |
146 | return 0x0a; | |
147 | case 57600: | |
148 | return 0x0b; | |
149 | case 115200: | |
150 | return 0x0c; | |
1da177e4 | 151 | default: |
d0fab0dd | 152 | *result = 9600; |
1da177e4 LT |
153 | return 0x08; |
154 | } | |
155 | } else { | |
d0fab0dd AC |
156 | /* FIXME: Can we use any divider - should we do |
157 | divider = 115200/value; | |
158 | real baud = 115200/divider */ | |
1da177e4 | 159 | switch (value) { |
b3aceb2b AM |
160 | case 300: break; |
161 | case 600: break; | |
162 | case 1200: break; | |
163 | case 2400: break; | |
164 | case 4800: break; | |
165 | case 9600: break; | |
166 | case 19200: break; | |
167 | case 38400: break; | |
168 | case 57600: break; | |
169 | case 115200: break; | |
170 | default: | |
b3aceb2b | 171 | value = 9600; |
d0fab0dd | 172 | *result = 9600; |
1da177e4 LT |
173 | } |
174 | return 115200/value; | |
175 | } | |
176 | } | |
177 | ||
95da310e AC |
178 | static int mct_u232_set_baud_rate(struct tty_struct *tty, |
179 | struct usb_serial *serial, struct usb_serial_port *port, speed_t value) | |
1da177e4 | 180 | { |
af2ac1a0 | 181 | unsigned int divisor; |
e19b2560 | 182 | int rc; |
af2ac1a0 | 183 | unsigned char *buf; |
e19b2560 AC |
184 | unsigned char cts_enable_byte = 0; |
185 | speed_t speed; | |
186 | ||
af2ac1a0 PZ |
187 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); |
188 | if (buf == NULL) | |
189 | return -ENOMEM; | |
e19b2560 | 190 | |
af2ac1a0 PZ |
191 | divisor = mct_u232_calculate_baud_rate(serial, value, &speed); |
192 | put_unaligned_le32(cpu_to_le32(divisor), buf); | |
e19b2560 AC |
193 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
194 | MCT_U232_SET_BAUD_RATE_REQUEST, | |
195 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 196 | 0, 0, buf, MCT_U232_SET_BAUD_RATE_SIZE, |
e19b2560 | 197 | WDR_TIMEOUT); |
d0fab0dd | 198 | if (rc < 0) /*FIXME: What value speed results */ |
194343d9 GKH |
199 | dev_err(&port->dev, "Set BAUD RATE %d failed (error = %d)\n", |
200 | value, rc); | |
d0fab0dd | 201 | else |
95da310e | 202 | tty_encode_baud_rate(tty, speed, speed); |
4a770cca | 203 | dev_dbg(&port->dev, "set_baud_rate: value: 0x%x, divisor: 0x%x\n", value, divisor); |
1da177e4 LT |
204 | |
205 | /* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which | |
206 | always sends two extra USB 'device request' messages after the | |
207 | 'baud rate change' message. The actual functionality of the | |
208 | request codes in these messages is not fully understood but these | |
209 | particular codes are never seen in any operation besides a baud | |
45b844df DP |
210 | rate change. Both of these messages send a single byte of data. |
211 | In the first message, the value of this byte is always zero. | |
212 | ||
213 | The second message has been determined experimentally to control | |
214 | whether data will be transmitted to a device which is not asserting | |
215 | the 'CTS' signal. If the second message's data byte is zero, data | |
216 | will be transmitted even if 'CTS' is not asserted (i.e. no hardware | |
e19b2560 AC |
217 | flow control). if the second message's data byte is nonzero (a |
218 | value of 1 is used by this driver), data will not be transmitted to | |
219 | a device which is not asserting 'CTS'. | |
45b844df | 220 | */ |
1da177e4 | 221 | |
af2ac1a0 | 222 | buf[0] = 0; |
1da177e4 | 223 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
e19b2560 AC |
224 | MCT_U232_SET_UNKNOWN1_REQUEST, |
225 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 226 | 0, 0, buf, MCT_U232_SET_UNKNOWN1_SIZE, |
e19b2560 | 227 | WDR_TIMEOUT); |
1da177e4 | 228 | if (rc < 0) |
194343d9 GKH |
229 | dev_err(&port->dev, "Sending USB device request code %d " |
230 | "failed (error = %d)\n", MCT_U232_SET_UNKNOWN1_REQUEST, | |
231 | rc); | |
1da177e4 | 232 | |
e19b2560 | 233 | if (port && C_CRTSCTS(tty)) |
45b844df | 234 | cts_enable_byte = 1; |
45b844df | 235 | |
4a770cca GKH |
236 | dev_dbg(&port->dev, "set_baud_rate: send second control message, data = %02X\n", |
237 | cts_enable_byte); | |
af2ac1a0 | 238 | buf[0] = cts_enable_byte; |
1da177e4 | 239 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
e19b2560 AC |
240 | MCT_U232_SET_CTS_REQUEST, |
241 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 242 | 0, 0, buf, MCT_U232_SET_CTS_SIZE, |
e19b2560 | 243 | WDR_TIMEOUT); |
1da177e4 | 244 | if (rc < 0) |
194343d9 GKH |
245 | dev_err(&port->dev, "Sending USB device request code %d " |
246 | "failed (error = %d)\n", MCT_U232_SET_CTS_REQUEST, rc); | |
1da177e4 | 247 | |
af2ac1a0 | 248 | kfree(buf); |
e19b2560 | 249 | return rc; |
1da177e4 LT |
250 | } /* mct_u232_set_baud_rate */ |
251 | ||
4a770cca GKH |
252 | static int mct_u232_set_line_ctrl(struct usb_serial_port *port, |
253 | unsigned char lcr) | |
1da177e4 | 254 | { |
e19b2560 | 255 | int rc; |
af2ac1a0 PZ |
256 | unsigned char *buf; |
257 | ||
258 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
259 | if (buf == NULL) | |
260 | return -ENOMEM; | |
261 | ||
262 | buf[0] = lcr; | |
4a770cca | 263 | rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), |
e19b2560 AC |
264 | MCT_U232_SET_LINE_CTRL_REQUEST, |
265 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 266 | 0, 0, buf, MCT_U232_SET_LINE_CTRL_SIZE, |
e19b2560 | 267 | WDR_TIMEOUT); |
1da177e4 | 268 | if (rc < 0) |
4a770cca GKH |
269 | dev_err(&port->dev, "Set LINE CTRL 0x%x failed (error = %d)\n", lcr, rc); |
270 | dev_dbg(&port->dev, "set_line_ctrl: 0x%x\n", lcr); | |
af2ac1a0 | 271 | kfree(buf); |
e19b2560 | 272 | return rc; |
1da177e4 LT |
273 | } /* mct_u232_set_line_ctrl */ |
274 | ||
4a770cca | 275 | static int mct_u232_set_modem_ctrl(struct usb_serial_port *port, |
1da177e4 LT |
276 | unsigned int control_state) |
277 | { | |
e19b2560 | 278 | int rc; |
af2ac1a0 PZ |
279 | unsigned char mcr; |
280 | unsigned char *buf; | |
281 | ||
282 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
283 | if (buf == NULL) | |
284 | return -ENOMEM; | |
1da177e4 | 285 | |
af2ac1a0 | 286 | mcr = MCT_U232_MCR_NONE; |
1da177e4 LT |
287 | if (control_state & TIOCM_DTR) |
288 | mcr |= MCT_U232_MCR_DTR; | |
289 | if (control_state & TIOCM_RTS) | |
290 | mcr |= MCT_U232_MCR_RTS; | |
291 | ||
af2ac1a0 | 292 | buf[0] = mcr; |
4a770cca | 293 | rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), |
e19b2560 AC |
294 | MCT_U232_SET_MODEM_CTRL_REQUEST, |
295 | MCT_U232_SET_REQUEST_TYPE, | |
af2ac1a0 | 296 | 0, 0, buf, MCT_U232_SET_MODEM_CTRL_SIZE, |
e19b2560 | 297 | WDR_TIMEOUT); |
1aa3c63c AC |
298 | kfree(buf); |
299 | ||
4a770cca | 300 | dev_dbg(&port->dev, "set_modem_ctrl: state=0x%x ==> mcr=0x%x\n", control_state, mcr); |
1da177e4 | 301 | |
1aa3c63c | 302 | if (rc < 0) { |
4a770cca | 303 | dev_err(&port->dev, "Set MODEM CTRL 0x%x failed (error = %d)\n", mcr, rc); |
1aa3c63c AC |
304 | return rc; |
305 | } | |
306 | return 0; | |
1da177e4 LT |
307 | } /* mct_u232_set_modem_ctrl */ |
308 | ||
4a770cca GKH |
309 | static int mct_u232_get_modem_stat(struct usb_serial_port *port, |
310 | unsigned char *msr) | |
1da177e4 | 311 | { |
e19b2560 | 312 | int rc; |
af2ac1a0 PZ |
313 | unsigned char *buf; |
314 | ||
315 | buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL); | |
316 | if (buf == NULL) { | |
317 | *msr = 0; | |
318 | return -ENOMEM; | |
319 | } | |
4a770cca | 320 | rc = usb_control_msg(port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), |
e19b2560 AC |
321 | MCT_U232_GET_MODEM_STAT_REQUEST, |
322 | MCT_U232_GET_REQUEST_TYPE, | |
af2ac1a0 | 323 | 0, 0, buf, MCT_U232_GET_MODEM_STAT_SIZE, |
e19b2560 | 324 | WDR_TIMEOUT); |
1da177e4 | 325 | if (rc < 0) { |
4a770cca | 326 | dev_err(&port->dev, "Get MODEM STATus failed (error = %d)\n", rc); |
1da177e4 | 327 | *msr = 0; |
af2ac1a0 PZ |
328 | } else { |
329 | *msr = buf[0]; | |
1da177e4 | 330 | } |
4a770cca | 331 | dev_dbg(&port->dev, "get_modem_stat: 0x%x\n", *msr); |
af2ac1a0 | 332 | kfree(buf); |
e19b2560 | 333 | return rc; |
1da177e4 LT |
334 | } /* mct_u232_get_modem_stat */ |
335 | ||
7af75af2 VT |
336 | static void mct_u232_msr_to_icount(struct async_icount *icount, |
337 | unsigned char msr) | |
338 | { | |
339 | /* Translate Control Line states */ | |
340 | if (msr & MCT_U232_MSR_DDSR) | |
341 | icount->dsr++; | |
342 | if (msr & MCT_U232_MSR_DCTS) | |
343 | icount->cts++; | |
344 | if (msr & MCT_U232_MSR_DRI) | |
345 | icount->rng++; | |
346 | if (msr & MCT_U232_MSR_DCD) | |
347 | icount->dcd++; | |
348 | } /* mct_u232_msr_to_icount */ | |
349 | ||
4a770cca GKH |
350 | static void mct_u232_msr_to_state(struct usb_serial_port *port, |
351 | unsigned int *control_state, unsigned char msr) | |
1da177e4 | 352 | { |
e19b2560 | 353 | /* Translate Control Line states */ |
1da177e4 LT |
354 | if (msr & MCT_U232_MSR_DSR) |
355 | *control_state |= TIOCM_DSR; | |
356 | else | |
357 | *control_state &= ~TIOCM_DSR; | |
358 | if (msr & MCT_U232_MSR_CTS) | |
359 | *control_state |= TIOCM_CTS; | |
360 | else | |
361 | *control_state &= ~TIOCM_CTS; | |
362 | if (msr & MCT_U232_MSR_RI) | |
363 | *control_state |= TIOCM_RI; | |
364 | else | |
365 | *control_state &= ~TIOCM_RI; | |
366 | if (msr & MCT_U232_MSR_CD) | |
367 | *control_state |= TIOCM_CD; | |
368 | else | |
369 | *control_state &= ~TIOCM_CD; | |
4a770cca | 370 | dev_dbg(&port->dev, "msr_to_state: msr=0x%x ==> state=0x%x\n", msr, *control_state); |
1da177e4 LT |
371 | } /* mct_u232_msr_to_state */ |
372 | ||
373 | /* | |
374 | * Driver's tty interface functions | |
375 | */ | |
376 | ||
a8f2ae7a JH |
377 | static int mct_u232_port_probe(struct usb_serial_port *port) |
378 | { | |
379 | struct mct_u232_private *priv; | |
380 | ||
381 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
382 | if (!priv) | |
383 | return -ENOMEM; | |
1da177e4 | 384 | |
35807187 JH |
385 | /* Use second interrupt-in endpoint for reading. */ |
386 | priv->read_urb = port->serial->port[1]->interrupt_in_urb; | |
387 | priv->read_urb->context = port; | |
388 | ||
a8f2ae7a | 389 | spin_lock_init(&priv->lock); |
a8f2ae7a JH |
390 | |
391 | usb_set_serial_port_data(port, priv); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static int mct_u232_port_remove(struct usb_serial_port *port) | |
1da177e4 LT |
397 | { |
398 | struct mct_u232_private *priv; | |
e19b2560 | 399 | |
a8f2ae7a JH |
400 | priv = usb_get_serial_port_data(port); |
401 | kfree(priv); | |
402 | ||
403 | return 0; | |
404 | } | |
1da177e4 | 405 | |
a509a7e4 | 406 | static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
407 | { |
408 | struct usb_serial *serial = port->serial; | |
409 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
410 | int retval = 0; | |
411 | unsigned int control_state; | |
412 | unsigned long flags; | |
413 | unsigned char last_lcr; | |
414 | unsigned char last_msr; | |
415 | ||
1da177e4 LT |
416 | /* Compensate for a hardware bug: although the Sitecom U232-P25 |
417 | * device reports a maximum output packet size of 32 bytes, | |
418 | * it seems to be able to accept only 16 bytes (and that's what | |
419 | * SniffUSB says too...) | |
420 | */ | |
e19b2560 AC |
421 | if (le16_to_cpu(serial->dev->descriptor.idProduct) |
422 | == MCT_U232_SITECOM_PID) | |
1da177e4 LT |
423 | port->bulk_out_size = 16; |
424 | ||
e19b2560 | 425 | /* Do a defined restart: the normal serial device seems to |
1da177e4 LT |
426 | * always turn on DTR and RTS here, so do the same. I'm not |
427 | * sure if this is really necessary. But it should not harm | |
428 | * either. | |
429 | */ | |
430 | spin_lock_irqsave(&priv->lock, flags); | |
9db276f8 | 431 | if (tty && C_BAUD(tty)) |
1da177e4 LT |
432 | priv->control_state = TIOCM_DTR | TIOCM_RTS; |
433 | else | |
434 | priv->control_state = 0; | |
e19b2560 AC |
435 | |
436 | priv->last_lcr = (MCT_U232_DATA_BITS_8 | | |
1da177e4 LT |
437 | MCT_U232_PARITY_NONE | |
438 | MCT_U232_STOP_BITS_1); | |
439 | control_state = priv->control_state; | |
440 | last_lcr = priv->last_lcr; | |
441 | spin_unlock_irqrestore(&priv->lock, flags); | |
4a770cca GKH |
442 | mct_u232_set_modem_ctrl(port, control_state); |
443 | mct_u232_set_line_ctrl(port, last_lcr); | |
1da177e4 LT |
444 | |
445 | /* Read modem status and update control state */ | |
4a770cca | 446 | mct_u232_get_modem_stat(port, &last_msr); |
1da177e4 LT |
447 | spin_lock_irqsave(&priv->lock, flags); |
448 | priv->last_msr = last_msr; | |
4a770cca | 449 | mct_u232_msr_to_state(port, &priv->control_state, priv->last_msr); |
1da177e4 LT |
450 | spin_unlock_irqrestore(&priv->lock, flags); |
451 | ||
35807187 | 452 | retval = usb_submit_urb(priv->read_urb, GFP_KERNEL); |
1da177e4 | 453 | if (retval) { |
194343d9 | 454 | dev_err(&port->dev, |
35807187 | 455 | "usb_submit_urb(read) failed pipe 0x%x err %d\n", |
194343d9 | 456 | port->read_urb->pipe, retval); |
2f007de2 | 457 | goto error; |
1da177e4 LT |
458 | } |
459 | ||
1da177e4 | 460 | retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
2f007de2 | 461 | if (retval) { |
35807187 | 462 | usb_kill_urb(priv->read_urb); |
194343d9 GKH |
463 | dev_err(&port->dev, |
464 | "usb_submit_urb(read int) failed pipe 0x%x err %d", | |
465 | port->interrupt_in_urb->pipe, retval); | |
2f007de2 ON |
466 | goto error; |
467 | } | |
1da177e4 | 468 | return 0; |
2f007de2 ON |
469 | |
470 | error: | |
471 | return retval; | |
1da177e4 LT |
472 | } /* mct_u232_open */ |
473 | ||
335f8514 | 474 | static void mct_u232_dtr_rts(struct usb_serial_port *port, int on) |
1da177e4 | 475 | { |
45b844df DP |
476 | unsigned int control_state; |
477 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
1da177e4 | 478 | |
b2ca6990 JH |
479 | spin_lock_irq(&priv->lock); |
480 | if (on) | |
481 | priv->control_state |= TIOCM_DTR | TIOCM_RTS; | |
482 | else | |
483 | priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
484 | control_state = priv->control_state; | |
485 | spin_unlock_irq(&priv->lock); | |
486 | ||
487 | mct_u232_set_modem_ctrl(port, control_state); | |
335f8514 | 488 | } |
45b844df | 489 | |
335f8514 AC |
490 | static void mct_u232_close(struct usb_serial_port *port) |
491 | { | |
35807187 JH |
492 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
493 | ||
494 | usb_kill_urb(priv->read_urb); | |
5260e458 JH |
495 | usb_kill_urb(port->interrupt_in_urb); |
496 | ||
497 | usb_serial_generic_close(port); | |
1da177e4 LT |
498 | } /* mct_u232_close */ |
499 | ||
500 | ||
e19b2560 | 501 | static void mct_u232_read_int_callback(struct urb *urb) |
1da177e4 | 502 | { |
cdc97792 | 503 | struct usb_serial_port *port = urb->context; |
1da177e4 | 504 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
1da177e4 | 505 | unsigned char *data = urb->transfer_buffer; |
e96da398 GKH |
506 | int retval; |
507 | int status = urb->status; | |
1da177e4 LT |
508 | unsigned long flags; |
509 | ||
e96da398 | 510 | switch (status) { |
1da177e4 LT |
511 | case 0: |
512 | /* success */ | |
513 | break; | |
514 | case -ECONNRESET: | |
515 | case -ENOENT: | |
516 | case -ESHUTDOWN: | |
517 | /* this urb is terminated, clean up */ | |
4a770cca GKH |
518 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
519 | __func__, status); | |
1da177e4 LT |
520 | return; |
521 | default: | |
4a770cca GKH |
522 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
523 | __func__, status); | |
1da177e4 LT |
524 | goto exit; |
525 | } | |
526 | ||
59d33f2f | 527 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
1da177e4 LT |
528 | |
529 | /* | |
530 | * Work-a-round: handle the 'usual' bulk-in pipe here | |
531 | */ | |
532 | if (urb->transfer_buffer_length > 2) { | |
1da177e4 | 533 | if (urb->actual_length) { |
2e124b4a JS |
534 | tty_insert_flip_string(&port->port, data, |
535 | urb->actual_length); | |
536 | tty_flip_buffer_push(&port->port); | |
1da177e4 LT |
537 | } |
538 | goto exit; | |
539 | } | |
e19b2560 | 540 | |
1da177e4 LT |
541 | /* |
542 | * The interrupt-in pipe signals exceptional conditions (modem line | |
543 | * signal changes and errors). data[0] holds MSR, data[1] holds LSR. | |
544 | */ | |
545 | spin_lock_irqsave(&priv->lock, flags); | |
546 | priv->last_msr = data[MCT_U232_MSR_INDEX]; | |
e19b2560 | 547 | |
1da177e4 | 548 | /* Record Control Line states */ |
4a770cca | 549 | mct_u232_msr_to_state(port, &priv->control_state, priv->last_msr); |
1da177e4 | 550 | |
468c740e | 551 | mct_u232_msr_to_icount(&port->icount, priv->last_msr); |
7af75af2 | 552 | |
1da177e4 | 553 | #if 0 |
e19b2560 | 554 | /* Not yet handled. See belkin_sa.c for further information */ |
1da177e4 LT |
555 | /* Now to report any errors */ |
556 | priv->last_lsr = data[MCT_U232_LSR_INDEX]; | |
557 | /* | |
558 | * fill in the flip buffer here, but I do not know the relation | |
559 | * to the current/next receive buffer or characters. I need | |
560 | * to look in to this before committing any code. | |
561 | */ | |
562 | if (priv->last_lsr & MCT_U232_LSR_ERR) { | |
4a90f09b | 563 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
564 | /* Overrun Error */ |
565 | if (priv->last_lsr & MCT_U232_LSR_OE) { | |
566 | } | |
567 | /* Parity Error */ | |
568 | if (priv->last_lsr & MCT_U232_LSR_PE) { | |
569 | } | |
570 | /* Framing Error */ | |
571 | if (priv->last_lsr & MCT_U232_LSR_FE) { | |
572 | } | |
573 | /* Break Indicator */ | |
574 | if (priv->last_lsr & MCT_U232_LSR_BI) { | |
575 | } | |
4a90f09b | 576 | tty_kref_put(tty); |
1da177e4 LT |
577 | } |
578 | #endif | |
128434ab | 579 | wake_up_interruptible(&port->port.delta_msr_wait); |
1da177e4 LT |
580 | spin_unlock_irqrestore(&priv->lock, flags); |
581 | exit: | |
e19b2560 | 582 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
e96da398 | 583 | if (retval) |
194343d9 GKH |
584 | dev_err(&port->dev, |
585 | "%s - usb_submit_urb failed with result %d\n", | |
586 | __func__, retval); | |
1da177e4 LT |
587 | } /* mct_u232_read_int_callback */ |
588 | ||
e19b2560 AC |
589 | static void mct_u232_set_termios(struct tty_struct *tty, |
590 | struct usb_serial_port *port, | |
591 | struct ktermios *old_termios) | |
1da177e4 LT |
592 | { |
593 | struct usb_serial *serial = port->serial; | |
594 | struct mct_u232_private *priv = usb_get_serial_port_data(port); | |
adc8d746 | 595 | struct ktermios *termios = &tty->termios; |
d0fab0dd | 596 | unsigned int cflag = termios->c_cflag; |
1da177e4 LT |
597 | unsigned int old_cflag = old_termios->c_cflag; |
598 | unsigned long flags; | |
45b844df | 599 | unsigned int control_state; |
1da177e4 LT |
600 | unsigned char last_lcr; |
601 | ||
602 | /* get a local copy of the current port settings */ | |
603 | spin_lock_irqsave(&priv->lock, flags); | |
604 | control_state = priv->control_state; | |
605 | spin_unlock_irqrestore(&priv->lock, flags); | |
606 | last_lcr = 0; | |
607 | ||
608 | /* | |
609 | * Update baud rate. | |
610 | * Do not attempt to cache old rates and skip settings, | |
611 | * disconnects screw such tricks up completely. | |
612 | * Premature optimization is the root of all evil. | |
613 | */ | |
614 | ||
e19b2560 | 615 | /* reassert DTR and RTS on transition from B0 */ |
1da177e4 | 616 | if ((old_cflag & CBAUD) == B0) { |
4a770cca | 617 | dev_dbg(&port->dev, "%s: baud was B0\n", __func__); |
45b844df | 618 | control_state |= TIOCM_DTR | TIOCM_RTS; |
4a770cca | 619 | mct_u232_set_modem_ctrl(port, control_state); |
1da177e4 LT |
620 | } |
621 | ||
95da310e | 622 | mct_u232_set_baud_rate(tty, serial, port, tty_get_baud_rate(tty)); |
1da177e4 | 623 | |
e19b2560 | 624 | if ((cflag & CBAUD) == B0) { |
4a770cca | 625 | dev_dbg(&port->dev, "%s: baud is B0\n", __func__); |
1da177e4 LT |
626 | /* Drop RTS and DTR */ |
627 | control_state &= ~(TIOCM_DTR | TIOCM_RTS); | |
4a770cca | 628 | mct_u232_set_modem_ctrl(port, control_state); |
1da177e4 LT |
629 | } |
630 | ||
631 | /* | |
632 | * Update line control register (LCR) | |
633 | */ | |
634 | ||
635 | /* set the parity */ | |
636 | if (cflag & PARENB) | |
637 | last_lcr |= (cflag & PARODD) ? | |
638 | MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; | |
639 | else | |
640 | last_lcr |= MCT_U232_PARITY_NONE; | |
641 | ||
642 | /* set the number of data bits */ | |
643 | switch (cflag & CSIZE) { | |
644 | case CS5: | |
645 | last_lcr |= MCT_U232_DATA_BITS_5; break; | |
646 | case CS6: | |
647 | last_lcr |= MCT_U232_DATA_BITS_6; break; | |
648 | case CS7: | |
649 | last_lcr |= MCT_U232_DATA_BITS_7; break; | |
650 | case CS8: | |
651 | last_lcr |= MCT_U232_DATA_BITS_8; break; | |
652 | default: | |
194343d9 GKH |
653 | dev_err(&port->dev, |
654 | "CSIZE was not CS5-CS8, using default of 8\n"); | |
1da177e4 LT |
655 | last_lcr |= MCT_U232_DATA_BITS_8; |
656 | break; | |
657 | } | |
658 | ||
d0fab0dd AC |
659 | termios->c_cflag &= ~CMSPAR; |
660 | ||
1da177e4 LT |
661 | /* set the number of stop bits */ |
662 | last_lcr |= (cflag & CSTOPB) ? | |
663 | MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; | |
664 | ||
4a770cca | 665 | mct_u232_set_line_ctrl(port, last_lcr); |
1da177e4 | 666 | |
1da177e4 LT |
667 | /* save off the modified port settings */ |
668 | spin_lock_irqsave(&priv->lock, flags); | |
669 | priv->control_state = control_state; | |
670 | priv->last_lcr = last_lcr; | |
671 | spin_unlock_irqrestore(&priv->lock, flags); | |
672 | } /* mct_u232_set_termios */ | |
673 | ||
95da310e | 674 | static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 675 | { |
95da310e | 676 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
677 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
678 | unsigned char lcr; | |
679 | unsigned long flags; | |
680 | ||
1da177e4 LT |
681 | spin_lock_irqsave(&priv->lock, flags); |
682 | lcr = priv->last_lcr; | |
1da177e4 LT |
683 | |
684 | if (break_state) | |
685 | lcr |= MCT_U232_SET_BREAK; | |
6b447f04 | 686 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 687 | |
4a770cca | 688 | mct_u232_set_line_ctrl(port, lcr); |
1da177e4 LT |
689 | } /* mct_u232_break_ctl */ |
690 | ||
691 | ||
60b33c13 | 692 | static int mct_u232_tiocmget(struct tty_struct *tty) |
1da177e4 | 693 | { |
95da310e | 694 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
695 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
696 | unsigned int control_state; | |
697 | unsigned long flags; | |
e19b2560 | 698 | |
1da177e4 LT |
699 | spin_lock_irqsave(&priv->lock, flags); |
700 | control_state = priv->control_state; | |
701 | spin_unlock_irqrestore(&priv->lock, flags); | |
702 | ||
703 | return control_state; | |
704 | } | |
705 | ||
20b9d177 | 706 | static int mct_u232_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
707 | unsigned int set, unsigned int clear) |
708 | { | |
95da310e | 709 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
710 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
711 | unsigned int control_state; | |
712 | unsigned long flags; | |
e19b2560 | 713 | |
1da177e4 LT |
714 | spin_lock_irqsave(&priv->lock, flags); |
715 | control_state = priv->control_state; | |
716 | ||
717 | if (set & TIOCM_RTS) | |
718 | control_state |= TIOCM_RTS; | |
719 | if (set & TIOCM_DTR) | |
720 | control_state |= TIOCM_DTR; | |
721 | if (clear & TIOCM_RTS) | |
722 | control_state &= ~TIOCM_RTS; | |
723 | if (clear & TIOCM_DTR) | |
724 | control_state &= ~TIOCM_DTR; | |
725 | ||
726 | priv->control_state = control_state; | |
727 | spin_unlock_irqrestore(&priv->lock, flags); | |
4a770cca | 728 | return mct_u232_set_modem_ctrl(port, control_state); |
1da177e4 LT |
729 | } |
730 | ||
95da310e | 731 | static void mct_u232_throttle(struct tty_struct *tty) |
45b844df | 732 | { |
95da310e | 733 | struct usb_serial_port *port = tty->driver_data; |
45b844df | 734 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
45b844df | 735 | unsigned int control_state; |
45b844df | 736 | |
63832515 | 737 | spin_lock_irq(&priv->lock); |
45b844df DP |
738 | priv->rx_flags |= THROTTLED; |
739 | if (C_CRTSCTS(tty)) { | |
95da310e AC |
740 | priv->control_state &= ~TIOCM_RTS; |
741 | control_state = priv->control_state; | |
63832515 | 742 | spin_unlock_irq(&priv->lock); |
4a770cca | 743 | mct_u232_set_modem_ctrl(port, control_state); |
45b844df | 744 | } else { |
63832515 | 745 | spin_unlock_irq(&priv->lock); |
45b844df DP |
746 | } |
747 | } | |
748 | ||
95da310e | 749 | static void mct_u232_unthrottle(struct tty_struct *tty) |
45b844df | 750 | { |
95da310e | 751 | struct usb_serial_port *port = tty->driver_data; |
45b844df | 752 | struct mct_u232_private *priv = usb_get_serial_port_data(port); |
45b844df | 753 | unsigned int control_state; |
45b844df | 754 | |
63832515 | 755 | spin_lock_irq(&priv->lock); |
45b844df | 756 | if ((priv->rx_flags & THROTTLED) && C_CRTSCTS(tty)) { |
95da310e AC |
757 | priv->rx_flags &= ~THROTTLED; |
758 | priv->control_state |= TIOCM_RTS; | |
759 | control_state = priv->control_state; | |
63832515 | 760 | spin_unlock_irq(&priv->lock); |
4a770cca | 761 | mct_u232_set_modem_ctrl(port, control_state); |
45b844df | 762 | } else { |
63832515 | 763 | spin_unlock_irq(&priv->lock); |
45b844df DP |
764 | } |
765 | } | |
1da177e4 | 766 | |
68e24113 | 767 | module_usb_serial_driver(serial_drivers, id_table); |
1da177e4 | 768 | |
e19b2560 AC |
769 | MODULE_AUTHOR(DRIVER_AUTHOR); |
770 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 771 | MODULE_LICENSE("GPL"); |