Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * USB Keyspan PDA / Xircom / Entregra Converter driver | |
3 | * | |
4 | * Copyright (C) 1999 - 2001 Greg Kroah-Hartman <greg@kroah.com> | |
5 | * Copyright (C) 1999, 2000 Brian Warner <warner@lothar.com> | |
6 | * Copyright (C) 2000 Al Borchers <borchers@steinerpoint.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
9e70f319 AC |
13 | * See Documentation/usb/usb-serial.txt for more information on using this |
14 | * driver | |
1da177e4 LT |
15 | */ |
16 | ||
17 | ||
1da177e4 LT |
18 | #include <linux/kernel.h> |
19 | #include <linux/errno.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/tty.h> | |
23 | #include <linux/tty_driver.h> | |
24 | #include <linux/tty_flip.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/workqueue.h> | |
9e70f319 | 28 | #include <linux/uaccess.h> |
1da177e4 | 29 | #include <linux/usb.h> |
a969888c | 30 | #include <linux/usb/serial.h> |
cc183e2a | 31 | #include <linux/usb/ezusb.h> |
1da177e4 | 32 | |
1da177e4 LT |
33 | /* make a simple define to handle if we are compiling keyspan_pda or xircom support */ |
34 | #if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE) | |
35 | #define KEYSPAN | |
36 | #else | |
37 | #undef KEYSPAN | |
38 | #endif | |
39 | #if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE) | |
40 | #define XIRCOM | |
41 | #else | |
42 | #undef XIRCOM | |
43 | #endif | |
44 | ||
1da177e4 LT |
45 | /* |
46 | * Version Information | |
47 | */ | |
48 | #define DRIVER_VERSION "v1.1" | |
49 | #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>" | |
50 | #define DRIVER_DESC "USB Keyspan PDA Converter driver" | |
51 | ||
52 | struct keyspan_pda_private { | |
53 | int tx_room; | |
54 | int tx_throttled; | |
55 | struct work_struct wakeup_work; | |
56 | struct work_struct unthrottle_work; | |
c4028958 DH |
57 | struct usb_serial *serial; |
58 | struct usb_serial_port *port; | |
1da177e4 LT |
59 | }; |
60 | ||
61 | ||
62 | #define KEYSPAN_VENDOR_ID 0x06cd | |
63 | #define KEYSPAN_PDA_FAKE_ID 0x0103 | |
64 | #define KEYSPAN_PDA_ID 0x0104 /* no clue */ | |
65 | ||
66 | /* For Xircom PGSDB9 and older Entregra version of the same device */ | |
67 | #define XIRCOM_VENDOR_ID 0x085a | |
68 | #define XIRCOM_FAKE_ID 0x8027 | |
69 | #define ENTREGRA_VENDOR_ID 0x1645 | |
70 | #define ENTREGRA_FAKE_ID 0x8093 | |
71 | ||
7d40d7e8 | 72 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
73 | #ifdef KEYSPAN |
74 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, | |
75 | #endif | |
76 | #ifdef XIRCOM | |
77 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, | |
78 | { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) }, | |
79 | #endif | |
80 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, | |
81 | { } /* Terminating entry */ | |
82 | }; | |
83 | ||
9e70f319 | 84 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 85 | |
7d40d7e8 | 86 | static const struct usb_device_id id_table_std[] = { |
1da177e4 LT |
87 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, |
88 | { } /* Terminating entry */ | |
89 | }; | |
90 | ||
91 | #ifdef KEYSPAN | |
7d40d7e8 | 92 | static const struct usb_device_id id_table_fake[] = { |
1da177e4 LT |
93 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, |
94 | { } /* Terminating entry */ | |
95 | }; | |
96 | #endif | |
97 | ||
98 | #ifdef XIRCOM | |
7d40d7e8 | 99 | static const struct usb_device_id id_table_fake_xircom[] = { |
9e70f319 AC |
100 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, |
101 | { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) }, | |
102 | { } | |
1da177e4 LT |
103 | }; |
104 | #endif | |
105 | ||
c4028958 | 106 | static void keyspan_pda_wakeup_write(struct work_struct *work) |
1da177e4 | 107 | { |
c4028958 DH |
108 | struct keyspan_pda_private *priv = |
109 | container_of(work, struct keyspan_pda_private, wakeup_work); | |
110 | struct usb_serial_port *port = priv->port; | |
4a90f09b | 111 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
f7d7aedf JS |
112 | if (tty) |
113 | tty_wakeup(tty); | |
4a90f09b | 114 | tty_kref_put(tty); |
1da177e4 LT |
115 | } |
116 | ||
c4028958 | 117 | static void keyspan_pda_request_unthrottle(struct work_struct *work) |
1da177e4 | 118 | { |
c4028958 DH |
119 | struct keyspan_pda_private *priv = |
120 | container_of(work, struct keyspan_pda_private, unthrottle_work); | |
121 | struct usb_serial *serial = priv->serial; | |
1da177e4 LT |
122 | int result; |
123 | ||
1da177e4 LT |
124 | /* ask the device to tell us when the tx buffer becomes |
125 | sufficiently empty */ | |
9e70f319 | 126 | result = usb_control_msg(serial->dev, |
1da177e4 LT |
127 | usb_sndctrlpipe(serial->dev, 0), |
128 | 7, /* request_unthrottle */ | |
129 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
130 | | USB_DIR_OUT, | |
131 | 16, /* value: threshold */ | |
132 | 0, /* index */ | |
133 | NULL, | |
134 | 0, | |
135 | 2000); | |
136 | if (result < 0) | |
826575fc GKH |
137 | dev_dbg(&serial->dev->dev, "%s - error %d from usb_control_msg\n", |
138 | __func__, result); | |
1da177e4 LT |
139 | } |
140 | ||
141 | ||
9e70f319 | 142 | static void keyspan_pda_rx_interrupt(struct urb *urb) |
1da177e4 | 143 | { |
cdc97792 | 144 | struct usb_serial_port *port = urb->context; |
f7d7aedf | 145 | struct tty_struct *tty; |
1da177e4 | 146 | unsigned char *data = urb->transfer_buffer; |
23189aee GKH |
147 | int retval; |
148 | int status = urb->status; | |
1da177e4 LT |
149 | struct keyspan_pda_private *priv; |
150 | priv = usb_get_serial_port_data(port); | |
151 | ||
23189aee | 152 | switch (status) { |
1da177e4 LT |
153 | case 0: |
154 | /* success */ | |
155 | break; | |
156 | case -ECONNRESET: | |
157 | case -ENOENT: | |
158 | case -ESHUTDOWN: | |
159 | /* this urb is terminated, clean up */ | |
826575fc | 160 | dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); |
f7d7aedf | 161 | return; |
1da177e4 | 162 | default: |
826575fc | 163 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
1da177e4 LT |
164 | goto exit; |
165 | } | |
166 | ||
9e70f319 | 167 | /* see if the message is data or a status interrupt */ |
1da177e4 LT |
168 | switch (data[0]) { |
169 | case 0: | |
f7d7aedf JS |
170 | tty = tty_port_tty_get(&port->port); |
171 | /* rest of message is rx data */ | |
172 | if (tty && urb->actual_length) { | |
8dd03a5b AC |
173 | tty_insert_flip_string(tty, data + 1, |
174 | urb->actual_length - 1); | |
1da177e4 LT |
175 | tty_flip_buffer_push(tty); |
176 | } | |
f7d7aedf | 177 | tty_kref_put(tty); |
1da177e4 LT |
178 | break; |
179 | case 1: | |
180 | /* status interrupt */ | |
826575fc | 181 | dev_dbg(&port->dev, "rx int, d1=%d, d2=%d\n", data[1], data[2]); |
1da177e4 LT |
182 | switch (data[1]) { |
183 | case 1: /* modemline change */ | |
184 | break; | |
185 | case 2: /* tx unthrottle interrupt */ | |
186 | priv->tx_throttled = 0; | |
187 | /* queue up a wakeup at scheduler time */ | |
188 | schedule_work(&priv->wakeup_work); | |
189 | break; | |
190 | default: | |
191 | break; | |
192 | } | |
193 | break; | |
194 | default: | |
195 | break; | |
196 | } | |
197 | ||
198 | exit: | |
9e70f319 | 199 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
23189aee | 200 | if (retval) |
4a90f09b AC |
201 | dev_err(&port->dev, |
202 | "%s - usb_submit_urb failed with result %d", | |
203 | __func__, retval); | |
1da177e4 LT |
204 | } |
205 | ||
206 | ||
95da310e | 207 | static void keyspan_pda_rx_throttle(struct tty_struct *tty) |
1da177e4 LT |
208 | { |
209 | /* stop receiving characters. We just turn off the URB request, and | |
210 | let chars pile up in the device. If we're doing hardware | |
211 | flowcontrol, the device will signal the other end when its buffer | |
212 | fills up. If we're doing XON/XOFF, this would be a good time to | |
213 | send an XOFF, although it might make sense to foist that off | |
214 | upon the device too. */ | |
95da310e | 215 | struct usb_serial_port *port = tty->driver_data; |
5542cf79 | 216 | |
1da177e4 LT |
217 | usb_kill_urb(port->interrupt_in_urb); |
218 | } | |
219 | ||
220 | ||
95da310e | 221 | static void keyspan_pda_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 222 | { |
95da310e | 223 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 224 | /* just restart the receive interrupt URB */ |
5542cf79 | 225 | |
63832515 | 226 | if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL)) |
826575fc | 227 | dev_dbg(&port->dev, "usb_submit_urb(read urb) failed\n"); |
1da177e4 LT |
228 | } |
229 | ||
230 | ||
9e70f319 | 231 | static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud) |
1da177e4 LT |
232 | { |
233 | int rc; | |
234 | int bindex; | |
235 | ||
9e70f319 AC |
236 | switch (baud) { |
237 | case 110: | |
238 | bindex = 0; | |
239 | break; | |
240 | case 300: | |
241 | bindex = 1; | |
242 | break; | |
243 | case 1200: | |
244 | bindex = 2; | |
245 | break; | |
246 | case 2400: | |
247 | bindex = 3; | |
248 | break; | |
249 | case 4800: | |
250 | bindex = 4; | |
251 | break; | |
252 | case 9600: | |
253 | bindex = 5; | |
254 | break; | |
255 | case 19200: | |
256 | bindex = 6; | |
257 | break; | |
258 | case 38400: | |
259 | bindex = 7; | |
260 | break; | |
261 | case 57600: | |
262 | bindex = 8; | |
263 | break; | |
264 | case 115200: | |
265 | bindex = 9; | |
266 | break; | |
267 | default: | |
268 | bindex = 5; /* Default to 9600 */ | |
269 | baud = 9600; | |
1da177e4 LT |
270 | } |
271 | ||
272 | /* rather than figure out how to sleep while waiting for this | |
273 | to complete, I just use the "legacy" API. */ | |
274 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
275 | 0, /* set baud */ | |
9e70f319 | 276 | USB_TYPE_VENDOR |
1da177e4 LT |
277 | | USB_RECIP_INTERFACE |
278 | | USB_DIR_OUT, /* type */ | |
279 | bindex, /* value */ | |
280 | 0, /* index */ | |
281 | NULL, /* &data */ | |
282 | 0, /* size */ | |
283 | 2000); /* timeout */ | |
e7806e36 AC |
284 | if (rc < 0) |
285 | return 0; | |
286 | return baud; | |
1da177e4 LT |
287 | } |
288 | ||
289 | ||
95da310e | 290 | static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 291 | { |
95da310e | 292 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
293 | struct usb_serial *serial = port->serial; |
294 | int value; | |
295 | int result; | |
296 | ||
297 | if (break_state == -1) | |
298 | value = 1; /* start break */ | |
299 | else | |
300 | value = 0; /* clear break */ | |
301 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
9e70f319 AC |
302 | 4, /* set break */ |
303 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
304 | value, 0, NULL, 0, 2000); | |
1da177e4 | 305 | if (result < 0) |
826575fc GKH |
306 | dev_dbg(&port->dev, "%s - error %d from usb_control_msg\n", |
307 | __func__, result); | |
1da177e4 LT |
308 | /* there is something funky about this.. the TCSBRK that 'cu' performs |
309 | ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4 | |
310 | seconds apart, but it feels like the break sent isn't as long as it | |
311 | is on /dev/ttyS0 */ | |
312 | } | |
313 | ||
314 | ||
95da310e AC |
315 | static void keyspan_pda_set_termios(struct tty_struct *tty, |
316 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
317 | { |
318 | struct usb_serial *serial = port->serial; | |
e7806e36 | 319 | speed_t speed; |
1da177e4 LT |
320 | |
321 | /* cflag specifies lots of stuff: number of stop bits, parity, number | |
322 | of data bits, baud. What can the device actually handle?: | |
323 | CSTOPB (1 stop bit or 2) | |
324 | PARENB (parity) | |
325 | CSIZE (5bit .. 8bit) | |
326 | There is minimal hw support for parity (a PSW bit seems to hold the | |
327 | parity of whatever is in the accumulator). The UART either deals | |
328 | with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data, | |
329 | 1 special, stop). So, with firmware changes, we could do: | |
330 | 8N1: 10 bit | |
331 | 8N2: 11 bit, extra bit always (mark?) | |
332 | 8[EOMS]1: 11 bit, extra bit is parity | |
333 | 7[EOMS]1: 10 bit, b0/b7 is parity | |
334 | 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?) | |
335 | ||
adc8d746 | 336 | HW flow control is dictated by the tty->termios.c_cflags & CRTSCTS |
1da177e4 LT |
337 | bit. |
338 | ||
339 | For now, just do baud. */ | |
340 | ||
95da310e | 341 | speed = tty_get_baud_rate(tty); |
e7806e36 AC |
342 | speed = keyspan_pda_setbaud(serial, speed); |
343 | ||
344 | if (speed == 0) { | |
826575fc | 345 | dev_dbg(&port->dev, "can't handle requested baud rate\n"); |
e7806e36 AC |
346 | /* It hasn't changed so.. */ |
347 | speed = tty_termios_baud_rate(old_termios); | |
1da177e4 | 348 | } |
e7806e36 AC |
349 | /* Only speed can change so copy the old h/w parameters |
350 | then encode the new speed */ | |
adc8d746 | 351 | tty_termios_copy_hw(&tty->termios, old_termios); |
95da310e | 352 | tty_encode_baud_rate(tty, speed, speed); |
1da177e4 LT |
353 | } |
354 | ||
355 | ||
356 | /* modem control pins: DTR and RTS are outputs and can be controlled. | |
357 | DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be | |
358 | read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */ | |
359 | ||
360 | static int keyspan_pda_get_modem_info(struct usb_serial *serial, | |
361 | unsigned char *value) | |
362 | { | |
363 | int rc; | |
ca65d256 JH |
364 | u8 *data; |
365 | ||
366 | data = kmalloc(1, GFP_KERNEL); | |
367 | if (!data) | |
368 | return -ENOMEM; | |
369 | ||
1da177e4 LT |
370 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
371 | 3, /* get pins */ | |
372 | USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN, | |
ca65d256 | 373 | 0, 0, data, 1, 2000); |
3b36a8fd | 374 | if (rc >= 0) |
ca65d256 JH |
375 | *value = *data; |
376 | ||
377 | kfree(data); | |
1da177e4 LT |
378 | return rc; |
379 | } | |
380 | ||
381 | ||
382 | static int keyspan_pda_set_modem_info(struct usb_serial *serial, | |
383 | unsigned char value) | |
384 | { | |
385 | int rc; | |
386 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
387 | 3, /* set pins */ | |
388 | USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT, | |
389 | value, 0, NULL, 0, 2000); | |
390 | return rc; | |
391 | } | |
392 | ||
60b33c13 | 393 | static int keyspan_pda_tiocmget(struct tty_struct *tty) |
1da177e4 | 394 | { |
95da310e | 395 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
396 | struct usb_serial *serial = port->serial; |
397 | int rc; | |
398 | unsigned char status; | |
399 | int value; | |
400 | ||
401 | rc = keyspan_pda_get_modem_info(serial, &status); | |
402 | if (rc < 0) | |
403 | return rc; | |
404 | value = | |
405 | ((status & (1<<7)) ? TIOCM_DTR : 0) | | |
406 | ((status & (1<<6)) ? TIOCM_CAR : 0) | | |
407 | ((status & (1<<5)) ? TIOCM_RNG : 0) | | |
408 | ((status & (1<<4)) ? TIOCM_DSR : 0) | | |
409 | ((status & (1<<3)) ? TIOCM_CTS : 0) | | |
410 | ((status & (1<<2)) ? TIOCM_RTS : 0); | |
411 | return value; | |
412 | } | |
413 | ||
20b9d177 | 414 | static int keyspan_pda_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
415 | unsigned int set, unsigned int clear) |
416 | { | |
95da310e | 417 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
418 | struct usb_serial *serial = port->serial; |
419 | int rc; | |
420 | unsigned char status; | |
421 | ||
422 | rc = keyspan_pda_get_modem_info(serial, &status); | |
423 | if (rc < 0) | |
424 | return rc; | |
425 | ||
426 | if (set & TIOCM_RTS) | |
427 | status |= (1<<2); | |
428 | if (set & TIOCM_DTR) | |
429 | status |= (1<<7); | |
430 | ||
431 | if (clear & TIOCM_RTS) | |
432 | status &= ~(1<<2); | |
433 | if (clear & TIOCM_DTR) | |
434 | status &= ~(1<<7); | |
435 | rc = keyspan_pda_set_modem_info(serial, status); | |
436 | return rc; | |
437 | } | |
438 | ||
95da310e AC |
439 | static int keyspan_pda_write(struct tty_struct *tty, |
440 | struct usb_serial_port *port, const unsigned char *buf, int count) | |
1da177e4 LT |
441 | { |
442 | struct usb_serial *serial = port->serial; | |
443 | int request_unthrottle = 0; | |
444 | int rc = 0; | |
445 | struct keyspan_pda_private *priv; | |
446 | ||
447 | priv = usb_get_serial_port_data(port); | |
448 | /* guess how much room is left in the device's ring buffer, and if we | |
449 | want to send more than that, check first, updating our notion of | |
450 | what is left. If our write will result in no room left, ask the | |
451 | device to give us an interrupt when the room available rises above | |
452 | a threshold, and hold off all writers (eventually, those using | |
453 | select() or poll() too) until we receive that unthrottle interrupt. | |
454 | Block if we can't write anything at all, otherwise write as much as | |
455 | we can. */ | |
1da177e4 | 456 | if (count == 0) { |
826575fc | 457 | dev_dbg(&port->dev, "write request of 0 bytes\n"); |
9e70f319 | 458 | return 0; |
1da177e4 LT |
459 | } |
460 | ||
461 | /* we might block because of: | |
462 | the TX urb is in-flight (wait until it completes) | |
463 | the device is full (wait until it says there is room) | |
464 | */ | |
e81ee637 | 465 | spin_lock_bh(&port->lock); |
da280e34 | 466 | if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) { |
e81ee637 | 467 | spin_unlock_bh(&port->lock); |
507ca9bc | 468 | return 0; |
1da177e4 | 469 | } |
da280e34 | 470 | clear_bit(0, &port->write_urbs_free); |
e81ee637 | 471 | spin_unlock_bh(&port->lock); |
1da177e4 LT |
472 | |
473 | /* At this point the URB is in our control, nobody else can submit it | |
474 | again (the only sudden transition was the one from EINPROGRESS to | |
475 | finished). Also, the tx process is not throttled. So we are | |
476 | ready to write. */ | |
477 | ||
478 | count = (count > port->bulk_out_size) ? port->bulk_out_size : count; | |
479 | ||
480 | /* Check if we might overrun the Tx buffer. If so, ask the | |
481 | device how much room it really has. This is done only on | |
482 | scheduler time, since usb_control_msg() sleeps. */ | |
483 | if (count > priv->tx_room && !in_interrupt()) { | |
ca65d256 JH |
484 | u8 *room; |
485 | ||
486 | room = kmalloc(1, GFP_KERNEL); | |
487 | if (!room) { | |
488 | rc = -ENOMEM; | |
489 | goto exit; | |
490 | } | |
491 | ||
9e70f319 | 492 | rc = usb_control_msg(serial->dev, |
1da177e4 LT |
493 | usb_rcvctrlpipe(serial->dev, 0), |
494 | 6, /* write_room */ | |
495 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
496 | | USB_DIR_IN, | |
497 | 0, /* value: 0 means "remaining room" */ | |
498 | 0, /* index */ | |
ca65d256 | 499 | room, |
1da177e4 LT |
500 | 1, |
501 | 2000); | |
ca65d256 | 502 | if (rc > 0) { |
826575fc | 503 | dev_dbg(&port->dev, "roomquery says %d\n", *room); |
ca65d256 JH |
504 | priv->tx_room = *room; |
505 | } | |
506 | kfree(room); | |
1da177e4 | 507 | if (rc < 0) { |
826575fc | 508 | dev_dbg(&port->dev, "roomquery failed\n"); |
1da177e4 LT |
509 | goto exit; |
510 | } | |
511 | if (rc == 0) { | |
826575fc | 512 | dev_dbg(&port->dev, "roomquery returned 0 bytes\n"); |
1da177e4 LT |
513 | rc = -EIO; /* device didn't return any data */ |
514 | goto exit; | |
515 | } | |
1da177e4 LT |
516 | } |
517 | if (count > priv->tx_room) { | |
518 | /* we're about to completely fill the Tx buffer, so | |
519 | we'll be throttled afterwards. */ | |
520 | count = priv->tx_room; | |
521 | request_unthrottle = 1; | |
522 | } | |
523 | ||
524 | if (count) { | |
525 | /* now transfer data */ | |
9e70f319 | 526 | memcpy(port->write_urb->transfer_buffer, buf, count); |
1da177e4 LT |
527 | /* send the data out the bulk port */ |
528 | port->write_urb->transfer_buffer_length = count; | |
507ca9bc | 529 | |
1da177e4 LT |
530 | priv->tx_room -= count; |
531 | ||
1da177e4 LT |
532 | rc = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
533 | if (rc) { | |
826575fc | 534 | dev_dbg(&port->dev, "usb_submit_urb(write bulk) failed\n"); |
1da177e4 LT |
535 | goto exit; |
536 | } | |
9e70f319 | 537 | } else { |
1da177e4 LT |
538 | /* There wasn't any room left, so we are throttled until |
539 | the buffer empties a bit */ | |
540 | request_unthrottle = 1; | |
541 | } | |
542 | ||
543 | if (request_unthrottle) { | |
544 | priv->tx_throttled = 1; /* block writers */ | |
545 | schedule_work(&priv->unthrottle_work); | |
546 | } | |
547 | ||
548 | rc = count; | |
549 | exit: | |
507ca9bc | 550 | if (rc < 0) |
da280e34 | 551 | set_bit(0, &port->write_urbs_free); |
1da177e4 LT |
552 | return rc; |
553 | } | |
554 | ||
555 | ||
9e70f319 | 556 | static void keyspan_pda_write_bulk_callback(struct urb *urb) |
1da177e4 | 557 | { |
cdc97792 | 558 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
559 | struct keyspan_pda_private *priv; |
560 | ||
da280e34 | 561 | set_bit(0, &port->write_urbs_free); |
1da177e4 LT |
562 | priv = usb_get_serial_port_data(port); |
563 | ||
564 | /* queue up a wakeup at scheduler time */ | |
565 | schedule_work(&priv->wakeup_work); | |
566 | } | |
567 | ||
568 | ||
95da310e | 569 | static int keyspan_pda_write_room(struct tty_struct *tty) |
1da177e4 | 570 | { |
95da310e | 571 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 572 | struct keyspan_pda_private *priv; |
1da177e4 | 573 | priv = usb_get_serial_port_data(port); |
1da177e4 LT |
574 | /* used by n_tty.c for processing of tabs and such. Giving it our |
575 | conservative guess is probably good enough, but needs testing by | |
576 | running a console through the device. */ | |
9e70f319 | 577 | return priv->tx_room; |
1da177e4 LT |
578 | } |
579 | ||
580 | ||
95da310e | 581 | static int keyspan_pda_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 582 | { |
95da310e | 583 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 584 | struct keyspan_pda_private *priv; |
a5b6f60c AC |
585 | unsigned long flags; |
586 | int ret = 0; | |
507ca9bc | 587 | |
1da177e4 | 588 | priv = usb_get_serial_port_data(port); |
507ca9bc | 589 | |
1da177e4 LT |
590 | /* when throttled, return at least WAKEUP_CHARS to tell select() (via |
591 | n_tty.c:normal_poll() ) that we're not writeable. */ | |
a5b6f60c AC |
592 | |
593 | spin_lock_irqsave(&port->lock, flags); | |
da280e34 | 594 | if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) |
a5b6f60c AC |
595 | ret = 256; |
596 | spin_unlock_irqrestore(&port->lock, flags); | |
597 | return ret; | |
1da177e4 LT |
598 | } |
599 | ||
600 | ||
335f8514 AC |
601 | static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on) |
602 | { | |
603 | struct usb_serial *serial = port->serial; | |
604 | ||
605 | if (serial->dev) { | |
606 | if (on) | |
607 | keyspan_pda_set_modem_info(serial, (1<<7) | (1<< 2)); | |
608 | else | |
609 | keyspan_pda_set_modem_info(serial, 0); | |
610 | } | |
611 | } | |
612 | ||
335f8514 | 613 | |
95da310e | 614 | static int keyspan_pda_open(struct tty_struct *tty, |
a509a7e4 | 615 | struct usb_serial_port *port) |
1da177e4 LT |
616 | { |
617 | struct usb_serial *serial = port->serial; | |
ca65d256 | 618 | u8 *room; |
1da177e4 LT |
619 | int rc = 0; |
620 | struct keyspan_pda_private *priv; | |
621 | ||
622 | /* find out how much room is in the Tx ring */ | |
ca65d256 JH |
623 | room = kmalloc(1, GFP_KERNEL); |
624 | if (!room) | |
625 | return -ENOMEM; | |
626 | ||
1da177e4 LT |
627 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
628 | 6, /* write_room */ | |
629 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
630 | | USB_DIR_IN, | |
631 | 0, /* value */ | |
632 | 0, /* index */ | |
ca65d256 | 633 | room, |
1da177e4 LT |
634 | 1, |
635 | 2000); | |
636 | if (rc < 0) { | |
826575fc | 637 | dev_dbg(&port->dev, "%s - roomquery failed\n", __func__); |
1da177e4 LT |
638 | goto error; |
639 | } | |
640 | if (rc == 0) { | |
826575fc | 641 | dev_dbg(&port->dev, "%s - roomquery returned 0 bytes\n", __func__); |
1da177e4 LT |
642 | rc = -EIO; |
643 | goto error; | |
644 | } | |
645 | priv = usb_get_serial_port_data(port); | |
ca65d256 JH |
646 | priv->tx_room = *room; |
647 | priv->tx_throttled = *room ? 0 : 1; | |
1da177e4 | 648 | |
1da177e4 | 649 | /*Start reading from the device*/ |
1da177e4 LT |
650 | rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
651 | if (rc) { | |
826575fc | 652 | dev_dbg(&port->dev, "%s - usb_submit_urb(read int) failed\n", __func__); |
1da177e4 LT |
653 | goto error; |
654 | } | |
1da177e4 | 655 | error: |
ca65d256 | 656 | kfree(room); |
1da177e4 LT |
657 | return rc; |
658 | } | |
335f8514 | 659 | static void keyspan_pda_close(struct usb_serial_port *port) |
1da177e4 LT |
660 | { |
661 | struct usb_serial *serial = port->serial; | |
662 | ||
663 | if (serial->dev) { | |
1da177e4 LT |
664 | /* shutdown our bulk reads and writes */ |
665 | usb_kill_urb(port->write_urb); | |
666 | usb_kill_urb(port->interrupt_in_urb); | |
667 | } | |
668 | } | |
669 | ||
670 | ||
671 | /* download the firmware to a "fake" device (pre-renumeration) */ | |
9e70f319 | 672 | static int keyspan_pda_fake_startup(struct usb_serial *serial) |
1da177e4 LT |
673 | { |
674 | int response; | |
3edbf98b | 675 | const char *fw_name; |
1da177e4 LT |
676 | |
677 | /* download the firmware here ... */ | |
cc183e2a | 678 | response = ezusb_fx1_set_reset(serial->dev, 1); |
1da177e4 | 679 | |
3edbf98b | 680 | if (0) { ; } |
1da177e4 | 681 | #ifdef KEYSPAN |
3edbf98b DW |
682 | else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID) |
683 | fw_name = "keyspan_pda/keyspan_pda.fw"; | |
1da177e4 LT |
684 | #endif |
685 | #ifdef XIRCOM | |
3edbf98b DW |
686 | else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) || |
687 | (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID)) | |
688 | fw_name = "keyspan_pda/xircom_pgs.fw"; | |
1da177e4 | 689 | #endif |
3edbf98b | 690 | else { |
194343d9 GKH |
691 | dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n", |
692 | __func__); | |
1da177e4 LT |
693 | return -ENODEV; |
694 | } | |
8d733e26 RB |
695 | |
696 | if (ezusb_fx1_ihex_firmware_download(serial->dev, fw_name) < 0) { | |
194343d9 GKH |
697 | dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n", |
698 | fw_name); | |
3edbf98b DW |
699 | return -ENOENT; |
700 | } | |
8d733e26 RB |
701 | |
702 | /* after downloading firmware Renumeration will occur in a | |
703 | moment and the new device will bind to the real driver */ | |
1da177e4 LT |
704 | |
705 | /* we want this device to fail to have a driver assigned to it. */ | |
9e70f319 | 706 | return 1; |
1da177e4 LT |
707 | } |
708 | ||
e6c4ef98 BH |
709 | #ifdef KEYSPAN |
710 | MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw"); | |
711 | #endif | |
712 | #ifdef XIRCOM | |
713 | MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw"); | |
714 | #endif | |
715 | ||
9e70f319 | 716 | static int keyspan_pda_startup(struct usb_serial *serial) |
1da177e4 LT |
717 | { |
718 | ||
719 | struct keyspan_pda_private *priv; | |
720 | ||
721 | /* allocate the private data structures for all ports. Well, for all | |
722 | one ports. */ | |
723 | ||
724 | priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL); | |
725 | if (!priv) | |
9e70f319 | 726 | return 1; /* error */ |
1da177e4 LT |
727 | usb_set_serial_port_data(serial->port[0], priv); |
728 | init_waitqueue_head(&serial->port[0]->write_wait); | |
c4028958 DH |
729 | INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write); |
730 | INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle); | |
731 | priv->serial = serial; | |
732 | priv->port = serial->port[0]; | |
9e70f319 | 733 | return 0; |
1da177e4 LT |
734 | } |
735 | ||
f9c99bb8 | 736 | static void keyspan_pda_release(struct usb_serial *serial) |
1da177e4 | 737 | { |
1da177e4 LT |
738 | kfree(usb_get_serial_port_data(serial->port[0])); |
739 | } | |
740 | ||
741 | #ifdef KEYSPAN | |
ea65370d | 742 | static struct usb_serial_driver keyspan_pda_fake_device = { |
18fcac35 GKH |
743 | .driver = { |
744 | .owner = THIS_MODULE, | |
269bda1c | 745 | .name = "keyspan_pda_pre", |
18fcac35 | 746 | }, |
269bda1c | 747 | .description = "Keyspan PDA - (prerenumeration)", |
1da177e4 | 748 | .id_table = id_table_fake, |
1da177e4 LT |
749 | .num_ports = 1, |
750 | .attach = keyspan_pda_fake_startup, | |
751 | }; | |
752 | #endif | |
753 | ||
754 | #ifdef XIRCOM | |
ea65370d | 755 | static struct usb_serial_driver xircom_pgs_fake_device = { |
18fcac35 GKH |
756 | .driver = { |
757 | .owner = THIS_MODULE, | |
269bda1c | 758 | .name = "xircom_no_firm", |
18fcac35 | 759 | }, |
269bda1c | 760 | .description = "Xircom / Entregra PGS - (prerenumeration)", |
1da177e4 | 761 | .id_table = id_table_fake_xircom, |
1da177e4 LT |
762 | .num_ports = 1, |
763 | .attach = keyspan_pda_fake_startup, | |
764 | }; | |
765 | #endif | |
766 | ||
ea65370d | 767 | static struct usb_serial_driver keyspan_pda_device = { |
18fcac35 GKH |
768 | .driver = { |
769 | .owner = THIS_MODULE, | |
269bda1c | 770 | .name = "keyspan_pda", |
18fcac35 | 771 | }, |
269bda1c | 772 | .description = "Keyspan PDA", |
1da177e4 | 773 | .id_table = id_table_std, |
1da177e4 | 774 | .num_ports = 1, |
335f8514 | 775 | .dtr_rts = keyspan_pda_dtr_rts, |
1da177e4 LT |
776 | .open = keyspan_pda_open, |
777 | .close = keyspan_pda_close, | |
778 | .write = keyspan_pda_write, | |
779 | .write_room = keyspan_pda_write_room, | |
780 | .write_bulk_callback = keyspan_pda_write_bulk_callback, | |
781 | .read_int_callback = keyspan_pda_rx_interrupt, | |
782 | .chars_in_buffer = keyspan_pda_chars_in_buffer, | |
783 | .throttle = keyspan_pda_rx_throttle, | |
784 | .unthrottle = keyspan_pda_rx_unthrottle, | |
1da177e4 LT |
785 | .set_termios = keyspan_pda_set_termios, |
786 | .break_ctl = keyspan_pda_break_ctl, | |
787 | .tiocmget = keyspan_pda_tiocmget, | |
788 | .tiocmset = keyspan_pda_tiocmset, | |
789 | .attach = keyspan_pda_startup, | |
f9c99bb8 | 790 | .release = keyspan_pda_release, |
1da177e4 LT |
791 | }; |
792 | ||
8c49fc99 GKH |
793 | static struct usb_serial_driver * const serial_drivers[] = { |
794 | &keyspan_pda_device, | |
1da177e4 | 795 | #ifdef KEYSPAN |
8c49fc99 | 796 | &keyspan_pda_fake_device, |
1da177e4 LT |
797 | #endif |
798 | #ifdef XIRCOM | |
8c49fc99 | 799 | &xircom_pgs_fake_device, |
1da177e4 | 800 | #endif |
8c49fc99 GKH |
801 | NULL |
802 | }; | |
1da177e4 | 803 | |
68e24113 | 804 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 805 | |
9e70f319 AC |
806 | MODULE_AUTHOR(DRIVER_AUTHOR); |
807 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 808 | MODULE_LICENSE("GPL"); |