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 | #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>" |
46 | #define DRIVER_DESC "USB Keyspan PDA Converter driver" | |
47 | ||
48 | struct keyspan_pda_private { | |
49 | int tx_room; | |
50 | int tx_throttled; | |
51 | struct work_struct wakeup_work; | |
52 | struct work_struct unthrottle_work; | |
c4028958 DH |
53 | struct usb_serial *serial; |
54 | struct usb_serial_port *port; | |
1da177e4 LT |
55 | }; |
56 | ||
57 | ||
58 | #define KEYSPAN_VENDOR_ID 0x06cd | |
59 | #define KEYSPAN_PDA_FAKE_ID 0x0103 | |
60 | #define KEYSPAN_PDA_ID 0x0104 /* no clue */ | |
61 | ||
62 | /* For Xircom PGSDB9 and older Entregra version of the same device */ | |
63 | #define XIRCOM_VENDOR_ID 0x085a | |
64 | #define XIRCOM_FAKE_ID 0x8027 | |
65 | #define ENTREGRA_VENDOR_ID 0x1645 | |
66 | #define ENTREGRA_FAKE_ID 0x8093 | |
67 | ||
7d40d7e8 | 68 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
69 | #ifdef KEYSPAN |
70 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, | |
71 | #endif | |
72 | #ifdef XIRCOM | |
73 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, | |
74 | { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) }, | |
75 | #endif | |
76 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, | |
77 | { } /* Terminating entry */ | |
78 | }; | |
79 | ||
9e70f319 | 80 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 81 | |
7d40d7e8 | 82 | static const struct usb_device_id id_table_std[] = { |
1da177e4 LT |
83 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, |
84 | { } /* Terminating entry */ | |
85 | }; | |
86 | ||
87 | #ifdef KEYSPAN | |
7d40d7e8 | 88 | static const struct usb_device_id id_table_fake[] = { |
1da177e4 LT |
89 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, |
90 | { } /* Terminating entry */ | |
91 | }; | |
92 | #endif | |
93 | ||
94 | #ifdef XIRCOM | |
7d40d7e8 | 95 | static const struct usb_device_id id_table_fake_xircom[] = { |
9e70f319 AC |
96 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, |
97 | { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) }, | |
98 | { } | |
1da177e4 LT |
99 | }; |
100 | #endif | |
101 | ||
c4028958 | 102 | static void keyspan_pda_wakeup_write(struct work_struct *work) |
1da177e4 | 103 | { |
c4028958 DH |
104 | struct keyspan_pda_private *priv = |
105 | container_of(work, struct keyspan_pda_private, wakeup_work); | |
106 | struct usb_serial_port *port = priv->port; | |
6aad04f2 JS |
107 | |
108 | tty_port_tty_wakeup(&port->port); | |
1da177e4 LT |
109 | } |
110 | ||
c4028958 | 111 | static void keyspan_pda_request_unthrottle(struct work_struct *work) |
1da177e4 | 112 | { |
c4028958 DH |
113 | struct keyspan_pda_private *priv = |
114 | container_of(work, struct keyspan_pda_private, unthrottle_work); | |
115 | struct usb_serial *serial = priv->serial; | |
1da177e4 LT |
116 | int result; |
117 | ||
1da177e4 LT |
118 | /* ask the device to tell us when the tx buffer becomes |
119 | sufficiently empty */ | |
9e70f319 | 120 | result = usb_control_msg(serial->dev, |
1da177e4 LT |
121 | usb_sndctrlpipe(serial->dev, 0), |
122 | 7, /* request_unthrottle */ | |
123 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
124 | | USB_DIR_OUT, | |
125 | 16, /* value: threshold */ | |
126 | 0, /* index */ | |
127 | NULL, | |
128 | 0, | |
129 | 2000); | |
130 | if (result < 0) | |
826575fc GKH |
131 | dev_dbg(&serial->dev->dev, "%s - error %d from usb_control_msg\n", |
132 | __func__, result); | |
1da177e4 LT |
133 | } |
134 | ||
135 | ||
9e70f319 | 136 | static void keyspan_pda_rx_interrupt(struct urb *urb) |
1da177e4 | 137 | { |
cdc97792 | 138 | struct usb_serial_port *port = urb->context; |
1da177e4 | 139 | unsigned char *data = urb->transfer_buffer; |
23189aee GKH |
140 | int retval; |
141 | int status = urb->status; | |
1da177e4 LT |
142 | struct keyspan_pda_private *priv; |
143 | priv = usb_get_serial_port_data(port); | |
144 | ||
23189aee | 145 | switch (status) { |
1da177e4 LT |
146 | case 0: |
147 | /* success */ | |
148 | break; | |
149 | case -ECONNRESET: | |
150 | case -ENOENT: | |
151 | case -ESHUTDOWN: | |
152 | /* this urb is terminated, clean up */ | |
826575fc | 153 | dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); |
f7d7aedf | 154 | return; |
1da177e4 | 155 | default: |
826575fc | 156 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
1da177e4 LT |
157 | goto exit; |
158 | } | |
159 | ||
9e70f319 | 160 | /* see if the message is data or a status interrupt */ |
1da177e4 LT |
161 | switch (data[0]) { |
162 | case 0: | |
f7d7aedf | 163 | /* rest of message is rx data */ |
2e124b4a | 164 | if (urb->actual_length) { |
05c7cd39 | 165 | tty_insert_flip_string(&port->port, data + 1, |
8dd03a5b | 166 | urb->actual_length - 1); |
2e124b4a | 167 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
168 | } |
169 | break; | |
170 | case 1: | |
171 | /* status interrupt */ | |
826575fc | 172 | dev_dbg(&port->dev, "rx int, d1=%d, d2=%d\n", data[1], data[2]); |
1da177e4 LT |
173 | switch (data[1]) { |
174 | case 1: /* modemline change */ | |
175 | break; | |
176 | case 2: /* tx unthrottle interrupt */ | |
177 | priv->tx_throttled = 0; | |
178 | /* queue up a wakeup at scheduler time */ | |
179 | schedule_work(&priv->wakeup_work); | |
180 | break; | |
181 | default: | |
182 | break; | |
183 | } | |
184 | break; | |
185 | default: | |
186 | break; | |
187 | } | |
188 | ||
189 | exit: | |
9e70f319 | 190 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
23189aee | 191 | if (retval) |
4a90f09b AC |
192 | dev_err(&port->dev, |
193 | "%s - usb_submit_urb failed with result %d", | |
194 | __func__, retval); | |
1da177e4 LT |
195 | } |
196 | ||
197 | ||
95da310e | 198 | static void keyspan_pda_rx_throttle(struct tty_struct *tty) |
1da177e4 LT |
199 | { |
200 | /* stop receiving characters. We just turn off the URB request, and | |
201 | let chars pile up in the device. If we're doing hardware | |
202 | flowcontrol, the device will signal the other end when its buffer | |
203 | fills up. If we're doing XON/XOFF, this would be a good time to | |
204 | send an XOFF, although it might make sense to foist that off | |
205 | upon the device too. */ | |
95da310e | 206 | struct usb_serial_port *port = tty->driver_data; |
5542cf79 | 207 | |
1da177e4 LT |
208 | usb_kill_urb(port->interrupt_in_urb); |
209 | } | |
210 | ||
211 | ||
95da310e | 212 | static void keyspan_pda_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 213 | { |
95da310e | 214 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 215 | /* just restart the receive interrupt URB */ |
5542cf79 | 216 | |
63832515 | 217 | if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL)) |
826575fc | 218 | dev_dbg(&port->dev, "usb_submit_urb(read urb) failed\n"); |
1da177e4 LT |
219 | } |
220 | ||
221 | ||
9e70f319 | 222 | static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud) |
1da177e4 LT |
223 | { |
224 | int rc; | |
225 | int bindex; | |
226 | ||
9e70f319 AC |
227 | switch (baud) { |
228 | case 110: | |
229 | bindex = 0; | |
230 | break; | |
231 | case 300: | |
232 | bindex = 1; | |
233 | break; | |
234 | case 1200: | |
235 | bindex = 2; | |
236 | break; | |
237 | case 2400: | |
238 | bindex = 3; | |
239 | break; | |
240 | case 4800: | |
241 | bindex = 4; | |
242 | break; | |
243 | case 9600: | |
244 | bindex = 5; | |
245 | break; | |
246 | case 19200: | |
247 | bindex = 6; | |
248 | break; | |
249 | case 38400: | |
250 | bindex = 7; | |
251 | break; | |
252 | case 57600: | |
253 | bindex = 8; | |
254 | break; | |
255 | case 115200: | |
256 | bindex = 9; | |
257 | break; | |
258 | default: | |
259 | bindex = 5; /* Default to 9600 */ | |
260 | baud = 9600; | |
1da177e4 LT |
261 | } |
262 | ||
263 | /* rather than figure out how to sleep while waiting for this | |
264 | to complete, I just use the "legacy" API. */ | |
265 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
266 | 0, /* set baud */ | |
9e70f319 | 267 | USB_TYPE_VENDOR |
1da177e4 LT |
268 | | USB_RECIP_INTERFACE |
269 | | USB_DIR_OUT, /* type */ | |
270 | bindex, /* value */ | |
271 | 0, /* index */ | |
272 | NULL, /* &data */ | |
273 | 0, /* size */ | |
274 | 2000); /* timeout */ | |
e7806e36 AC |
275 | if (rc < 0) |
276 | return 0; | |
277 | return baud; | |
1da177e4 LT |
278 | } |
279 | ||
280 | ||
95da310e | 281 | static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 282 | { |
95da310e | 283 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
284 | struct usb_serial *serial = port->serial; |
285 | int value; | |
286 | int result; | |
287 | ||
288 | if (break_state == -1) | |
289 | value = 1; /* start break */ | |
290 | else | |
291 | value = 0; /* clear break */ | |
292 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
9e70f319 AC |
293 | 4, /* set break */ |
294 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
295 | value, 0, NULL, 0, 2000); | |
1da177e4 | 296 | if (result < 0) |
826575fc GKH |
297 | dev_dbg(&port->dev, "%s - error %d from usb_control_msg\n", |
298 | __func__, result); | |
1da177e4 LT |
299 | /* there is something funky about this.. the TCSBRK that 'cu' performs |
300 | ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4 | |
301 | seconds apart, but it feels like the break sent isn't as long as it | |
302 | is on /dev/ttyS0 */ | |
303 | } | |
304 | ||
305 | ||
95da310e AC |
306 | static void keyspan_pda_set_termios(struct tty_struct *tty, |
307 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
308 | { |
309 | struct usb_serial *serial = port->serial; | |
e7806e36 | 310 | speed_t speed; |
1da177e4 LT |
311 | |
312 | /* cflag specifies lots of stuff: number of stop bits, parity, number | |
313 | of data bits, baud. What can the device actually handle?: | |
314 | CSTOPB (1 stop bit or 2) | |
315 | PARENB (parity) | |
316 | CSIZE (5bit .. 8bit) | |
317 | There is minimal hw support for parity (a PSW bit seems to hold the | |
318 | parity of whatever is in the accumulator). The UART either deals | |
319 | with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data, | |
320 | 1 special, stop). So, with firmware changes, we could do: | |
321 | 8N1: 10 bit | |
322 | 8N2: 11 bit, extra bit always (mark?) | |
323 | 8[EOMS]1: 11 bit, extra bit is parity | |
324 | 7[EOMS]1: 10 bit, b0/b7 is parity | |
325 | 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?) | |
326 | ||
adc8d746 | 327 | HW flow control is dictated by the tty->termios.c_cflags & CRTSCTS |
1da177e4 LT |
328 | bit. |
329 | ||
330 | For now, just do baud. */ | |
331 | ||
95da310e | 332 | speed = tty_get_baud_rate(tty); |
e7806e36 AC |
333 | speed = keyspan_pda_setbaud(serial, speed); |
334 | ||
335 | if (speed == 0) { | |
826575fc | 336 | dev_dbg(&port->dev, "can't handle requested baud rate\n"); |
e7806e36 AC |
337 | /* It hasn't changed so.. */ |
338 | speed = tty_termios_baud_rate(old_termios); | |
1da177e4 | 339 | } |
e7806e36 AC |
340 | /* Only speed can change so copy the old h/w parameters |
341 | then encode the new speed */ | |
adc8d746 | 342 | tty_termios_copy_hw(&tty->termios, old_termios); |
95da310e | 343 | tty_encode_baud_rate(tty, speed, speed); |
1da177e4 LT |
344 | } |
345 | ||
346 | ||
347 | /* modem control pins: DTR and RTS are outputs and can be controlled. | |
348 | DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be | |
349 | read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */ | |
350 | ||
351 | static int keyspan_pda_get_modem_info(struct usb_serial *serial, | |
352 | unsigned char *value) | |
353 | { | |
354 | int rc; | |
ca65d256 JH |
355 | u8 *data; |
356 | ||
357 | data = kmalloc(1, GFP_KERNEL); | |
358 | if (!data) | |
359 | return -ENOMEM; | |
360 | ||
1da177e4 LT |
361 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
362 | 3, /* get pins */ | |
363 | USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN, | |
ca65d256 | 364 | 0, 0, data, 1, 2000); |
3b36a8fd | 365 | if (rc >= 0) |
ca65d256 JH |
366 | *value = *data; |
367 | ||
368 | kfree(data); | |
1da177e4 LT |
369 | return rc; |
370 | } | |
371 | ||
372 | ||
373 | static int keyspan_pda_set_modem_info(struct usb_serial *serial, | |
374 | unsigned char value) | |
375 | { | |
376 | int rc; | |
377 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
378 | 3, /* set pins */ | |
379 | USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT, | |
380 | value, 0, NULL, 0, 2000); | |
381 | return rc; | |
382 | } | |
383 | ||
60b33c13 | 384 | static int keyspan_pda_tiocmget(struct tty_struct *tty) |
1da177e4 | 385 | { |
95da310e | 386 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
387 | struct usb_serial *serial = port->serial; |
388 | int rc; | |
389 | unsigned char status; | |
390 | int value; | |
391 | ||
392 | rc = keyspan_pda_get_modem_info(serial, &status); | |
393 | if (rc < 0) | |
394 | return rc; | |
395 | value = | |
396 | ((status & (1<<7)) ? TIOCM_DTR : 0) | | |
397 | ((status & (1<<6)) ? TIOCM_CAR : 0) | | |
398 | ((status & (1<<5)) ? TIOCM_RNG : 0) | | |
399 | ((status & (1<<4)) ? TIOCM_DSR : 0) | | |
400 | ((status & (1<<3)) ? TIOCM_CTS : 0) | | |
401 | ((status & (1<<2)) ? TIOCM_RTS : 0); | |
402 | return value; | |
403 | } | |
404 | ||
20b9d177 | 405 | static int keyspan_pda_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
406 | unsigned int set, unsigned int clear) |
407 | { | |
95da310e | 408 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
409 | struct usb_serial *serial = port->serial; |
410 | int rc; | |
411 | unsigned char status; | |
412 | ||
413 | rc = keyspan_pda_get_modem_info(serial, &status); | |
414 | if (rc < 0) | |
415 | return rc; | |
416 | ||
417 | if (set & TIOCM_RTS) | |
418 | status |= (1<<2); | |
419 | if (set & TIOCM_DTR) | |
420 | status |= (1<<7); | |
421 | ||
422 | if (clear & TIOCM_RTS) | |
423 | status &= ~(1<<2); | |
424 | if (clear & TIOCM_DTR) | |
425 | status &= ~(1<<7); | |
426 | rc = keyspan_pda_set_modem_info(serial, status); | |
427 | return rc; | |
428 | } | |
429 | ||
95da310e AC |
430 | static int keyspan_pda_write(struct tty_struct *tty, |
431 | struct usb_serial_port *port, const unsigned char *buf, int count) | |
1da177e4 LT |
432 | { |
433 | struct usb_serial *serial = port->serial; | |
434 | int request_unthrottle = 0; | |
435 | int rc = 0; | |
436 | struct keyspan_pda_private *priv; | |
437 | ||
438 | priv = usb_get_serial_port_data(port); | |
439 | /* guess how much room is left in the device's ring buffer, and if we | |
440 | want to send more than that, check first, updating our notion of | |
441 | what is left. If our write will result in no room left, ask the | |
442 | device to give us an interrupt when the room available rises above | |
443 | a threshold, and hold off all writers (eventually, those using | |
444 | select() or poll() too) until we receive that unthrottle interrupt. | |
445 | Block if we can't write anything at all, otherwise write as much as | |
446 | we can. */ | |
1da177e4 | 447 | if (count == 0) { |
826575fc | 448 | dev_dbg(&port->dev, "write request of 0 bytes\n"); |
9e70f319 | 449 | return 0; |
1da177e4 LT |
450 | } |
451 | ||
452 | /* we might block because of: | |
453 | the TX urb is in-flight (wait until it completes) | |
454 | the device is full (wait until it says there is room) | |
455 | */ | |
e81ee637 | 456 | spin_lock_bh(&port->lock); |
da280e34 | 457 | if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) { |
e81ee637 | 458 | spin_unlock_bh(&port->lock); |
507ca9bc | 459 | return 0; |
1da177e4 | 460 | } |
da280e34 | 461 | clear_bit(0, &port->write_urbs_free); |
e81ee637 | 462 | spin_unlock_bh(&port->lock); |
1da177e4 LT |
463 | |
464 | /* At this point the URB is in our control, nobody else can submit it | |
465 | again (the only sudden transition was the one from EINPROGRESS to | |
466 | finished). Also, the tx process is not throttled. So we are | |
467 | ready to write. */ | |
468 | ||
469 | count = (count > port->bulk_out_size) ? port->bulk_out_size : count; | |
470 | ||
471 | /* Check if we might overrun the Tx buffer. If so, ask the | |
472 | device how much room it really has. This is done only on | |
473 | scheduler time, since usb_control_msg() sleeps. */ | |
474 | if (count > priv->tx_room && !in_interrupt()) { | |
ca65d256 JH |
475 | u8 *room; |
476 | ||
477 | room = kmalloc(1, GFP_KERNEL); | |
478 | if (!room) { | |
479 | rc = -ENOMEM; | |
480 | goto exit; | |
481 | } | |
482 | ||
9e70f319 | 483 | rc = usb_control_msg(serial->dev, |
1da177e4 LT |
484 | usb_rcvctrlpipe(serial->dev, 0), |
485 | 6, /* write_room */ | |
486 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
487 | | USB_DIR_IN, | |
488 | 0, /* value: 0 means "remaining room" */ | |
489 | 0, /* index */ | |
ca65d256 | 490 | room, |
1da177e4 LT |
491 | 1, |
492 | 2000); | |
ca65d256 | 493 | if (rc > 0) { |
826575fc | 494 | dev_dbg(&port->dev, "roomquery says %d\n", *room); |
ca65d256 JH |
495 | priv->tx_room = *room; |
496 | } | |
497 | kfree(room); | |
1da177e4 | 498 | if (rc < 0) { |
826575fc | 499 | dev_dbg(&port->dev, "roomquery failed\n"); |
1da177e4 LT |
500 | goto exit; |
501 | } | |
502 | if (rc == 0) { | |
826575fc | 503 | dev_dbg(&port->dev, "roomquery returned 0 bytes\n"); |
1da177e4 LT |
504 | rc = -EIO; /* device didn't return any data */ |
505 | goto exit; | |
506 | } | |
1da177e4 LT |
507 | } |
508 | if (count > priv->tx_room) { | |
509 | /* we're about to completely fill the Tx buffer, so | |
510 | we'll be throttled afterwards. */ | |
511 | count = priv->tx_room; | |
512 | request_unthrottle = 1; | |
513 | } | |
514 | ||
515 | if (count) { | |
516 | /* now transfer data */ | |
9e70f319 | 517 | memcpy(port->write_urb->transfer_buffer, buf, count); |
1da177e4 LT |
518 | /* send the data out the bulk port */ |
519 | port->write_urb->transfer_buffer_length = count; | |
507ca9bc | 520 | |
1da177e4 LT |
521 | priv->tx_room -= count; |
522 | ||
1da177e4 LT |
523 | rc = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
524 | if (rc) { | |
826575fc | 525 | dev_dbg(&port->dev, "usb_submit_urb(write bulk) failed\n"); |
1da177e4 LT |
526 | goto exit; |
527 | } | |
9e70f319 | 528 | } else { |
1da177e4 LT |
529 | /* There wasn't any room left, so we are throttled until |
530 | the buffer empties a bit */ | |
531 | request_unthrottle = 1; | |
532 | } | |
533 | ||
534 | if (request_unthrottle) { | |
535 | priv->tx_throttled = 1; /* block writers */ | |
536 | schedule_work(&priv->unthrottle_work); | |
537 | } | |
538 | ||
539 | rc = count; | |
540 | exit: | |
507ca9bc | 541 | if (rc < 0) |
da280e34 | 542 | set_bit(0, &port->write_urbs_free); |
1da177e4 LT |
543 | return rc; |
544 | } | |
545 | ||
546 | ||
9e70f319 | 547 | static void keyspan_pda_write_bulk_callback(struct urb *urb) |
1da177e4 | 548 | { |
cdc97792 | 549 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
550 | struct keyspan_pda_private *priv; |
551 | ||
da280e34 | 552 | set_bit(0, &port->write_urbs_free); |
1da177e4 LT |
553 | priv = usb_get_serial_port_data(port); |
554 | ||
555 | /* queue up a wakeup at scheduler time */ | |
556 | schedule_work(&priv->wakeup_work); | |
557 | } | |
558 | ||
559 | ||
95da310e | 560 | static int keyspan_pda_write_room(struct tty_struct *tty) |
1da177e4 | 561 | { |
95da310e | 562 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 563 | struct keyspan_pda_private *priv; |
1da177e4 | 564 | priv = usb_get_serial_port_data(port); |
1da177e4 LT |
565 | /* used by n_tty.c for processing of tabs and such. Giving it our |
566 | conservative guess is probably good enough, but needs testing by | |
567 | running a console through the device. */ | |
9e70f319 | 568 | return priv->tx_room; |
1da177e4 LT |
569 | } |
570 | ||
571 | ||
95da310e | 572 | static int keyspan_pda_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 573 | { |
95da310e | 574 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 575 | struct keyspan_pda_private *priv; |
a5b6f60c AC |
576 | unsigned long flags; |
577 | int ret = 0; | |
507ca9bc | 578 | |
1da177e4 | 579 | priv = usb_get_serial_port_data(port); |
507ca9bc | 580 | |
1da177e4 LT |
581 | /* when throttled, return at least WAKEUP_CHARS to tell select() (via |
582 | n_tty.c:normal_poll() ) that we're not writeable. */ | |
a5b6f60c AC |
583 | |
584 | spin_lock_irqsave(&port->lock, flags); | |
da280e34 | 585 | if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) |
a5b6f60c AC |
586 | ret = 256; |
587 | spin_unlock_irqrestore(&port->lock, flags); | |
588 | return ret; | |
1da177e4 LT |
589 | } |
590 | ||
591 | ||
335f8514 AC |
592 | static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on) |
593 | { | |
594 | struct usb_serial *serial = port->serial; | |
595 | ||
d7f08452 JH |
596 | if (on) |
597 | keyspan_pda_set_modem_info(serial, (1 << 7) | (1 << 2)); | |
598 | else | |
599 | keyspan_pda_set_modem_info(serial, 0); | |
335f8514 AC |
600 | } |
601 | ||
335f8514 | 602 | |
95da310e | 603 | static int keyspan_pda_open(struct tty_struct *tty, |
a509a7e4 | 604 | struct usb_serial_port *port) |
1da177e4 LT |
605 | { |
606 | struct usb_serial *serial = port->serial; | |
ca65d256 | 607 | u8 *room; |
1da177e4 LT |
608 | int rc = 0; |
609 | struct keyspan_pda_private *priv; | |
610 | ||
611 | /* find out how much room is in the Tx ring */ | |
ca65d256 JH |
612 | room = kmalloc(1, GFP_KERNEL); |
613 | if (!room) | |
614 | return -ENOMEM; | |
615 | ||
1da177e4 LT |
616 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
617 | 6, /* write_room */ | |
618 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
619 | | USB_DIR_IN, | |
620 | 0, /* value */ | |
621 | 0, /* index */ | |
ca65d256 | 622 | room, |
1da177e4 LT |
623 | 1, |
624 | 2000); | |
625 | if (rc < 0) { | |
826575fc | 626 | dev_dbg(&port->dev, "%s - roomquery failed\n", __func__); |
1da177e4 LT |
627 | goto error; |
628 | } | |
629 | if (rc == 0) { | |
826575fc | 630 | dev_dbg(&port->dev, "%s - roomquery returned 0 bytes\n", __func__); |
1da177e4 LT |
631 | rc = -EIO; |
632 | goto error; | |
633 | } | |
634 | priv = usb_get_serial_port_data(port); | |
ca65d256 JH |
635 | priv->tx_room = *room; |
636 | priv->tx_throttled = *room ? 0 : 1; | |
1da177e4 | 637 | |
1da177e4 | 638 | /*Start reading from the device*/ |
1da177e4 LT |
639 | rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
640 | if (rc) { | |
826575fc | 641 | dev_dbg(&port->dev, "%s - usb_submit_urb(read int) failed\n", __func__); |
1da177e4 LT |
642 | goto error; |
643 | } | |
1da177e4 | 644 | error: |
ca65d256 | 645 | kfree(room); |
1da177e4 LT |
646 | return rc; |
647 | } | |
335f8514 | 648 | static void keyspan_pda_close(struct usb_serial_port *port) |
1da177e4 | 649 | { |
75d22b32 JH |
650 | usb_kill_urb(port->write_urb); |
651 | usb_kill_urb(port->interrupt_in_urb); | |
1da177e4 LT |
652 | } |
653 | ||
654 | ||
655 | /* download the firmware to a "fake" device (pre-renumeration) */ | |
9e70f319 | 656 | static int keyspan_pda_fake_startup(struct usb_serial *serial) |
1da177e4 LT |
657 | { |
658 | int response; | |
3edbf98b | 659 | const char *fw_name; |
1da177e4 LT |
660 | |
661 | /* download the firmware here ... */ | |
cc183e2a | 662 | response = ezusb_fx1_set_reset(serial->dev, 1); |
1da177e4 | 663 | |
3edbf98b | 664 | if (0) { ; } |
1da177e4 | 665 | #ifdef KEYSPAN |
3edbf98b DW |
666 | else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID) |
667 | fw_name = "keyspan_pda/keyspan_pda.fw"; | |
1da177e4 LT |
668 | #endif |
669 | #ifdef XIRCOM | |
3edbf98b DW |
670 | else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) || |
671 | (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID)) | |
672 | fw_name = "keyspan_pda/xircom_pgs.fw"; | |
1da177e4 | 673 | #endif |
3edbf98b | 674 | else { |
194343d9 GKH |
675 | dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n", |
676 | __func__); | |
1da177e4 LT |
677 | return -ENODEV; |
678 | } | |
8d733e26 RB |
679 | |
680 | if (ezusb_fx1_ihex_firmware_download(serial->dev, fw_name) < 0) { | |
194343d9 GKH |
681 | dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n", |
682 | fw_name); | |
3edbf98b DW |
683 | return -ENOENT; |
684 | } | |
8d733e26 RB |
685 | |
686 | /* after downloading firmware Renumeration will occur in a | |
687 | moment and the new device will bind to the real driver */ | |
1da177e4 LT |
688 | |
689 | /* we want this device to fail to have a driver assigned to it. */ | |
9e70f319 | 690 | return 1; |
1da177e4 LT |
691 | } |
692 | ||
e6c4ef98 BH |
693 | #ifdef KEYSPAN |
694 | MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw"); | |
695 | #endif | |
696 | #ifdef XIRCOM | |
697 | MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw"); | |
698 | #endif | |
699 | ||
94ab71ce | 700 | static int keyspan_pda_port_probe(struct usb_serial_port *port) |
1da177e4 LT |
701 | { |
702 | ||
703 | struct keyspan_pda_private *priv; | |
704 | ||
1da177e4 LT |
705 | priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL); |
706 | if (!priv) | |
94ab71ce JH |
707 | return -ENOMEM; |
708 | ||
c4028958 DH |
709 | INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write); |
710 | INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle); | |
94ab71ce JH |
711 | priv->serial = port->serial; |
712 | priv->port = port; | |
713 | ||
714 | usb_set_serial_port_data(port, priv); | |
715 | ||
9e70f319 | 716 | return 0; |
1da177e4 LT |
717 | } |
718 | ||
94ab71ce | 719 | static int keyspan_pda_port_remove(struct usb_serial_port *port) |
1da177e4 | 720 | { |
94ab71ce JH |
721 | struct keyspan_pda_private *priv; |
722 | ||
723 | priv = usb_get_serial_port_data(port); | |
724 | kfree(priv); | |
725 | ||
726 | return 0; | |
1da177e4 LT |
727 | } |
728 | ||
729 | #ifdef KEYSPAN | |
ea65370d | 730 | static struct usb_serial_driver keyspan_pda_fake_device = { |
18fcac35 GKH |
731 | .driver = { |
732 | .owner = THIS_MODULE, | |
269bda1c | 733 | .name = "keyspan_pda_pre", |
18fcac35 | 734 | }, |
269bda1c | 735 | .description = "Keyspan PDA - (prerenumeration)", |
1da177e4 | 736 | .id_table = id_table_fake, |
1da177e4 LT |
737 | .num_ports = 1, |
738 | .attach = keyspan_pda_fake_startup, | |
739 | }; | |
740 | #endif | |
741 | ||
742 | #ifdef XIRCOM | |
ea65370d | 743 | static struct usb_serial_driver xircom_pgs_fake_device = { |
18fcac35 GKH |
744 | .driver = { |
745 | .owner = THIS_MODULE, | |
269bda1c | 746 | .name = "xircom_no_firm", |
18fcac35 | 747 | }, |
269bda1c | 748 | .description = "Xircom / Entregra PGS - (prerenumeration)", |
1da177e4 | 749 | .id_table = id_table_fake_xircom, |
1da177e4 LT |
750 | .num_ports = 1, |
751 | .attach = keyspan_pda_fake_startup, | |
752 | }; | |
753 | #endif | |
754 | ||
ea65370d | 755 | static struct usb_serial_driver keyspan_pda_device = { |
18fcac35 GKH |
756 | .driver = { |
757 | .owner = THIS_MODULE, | |
269bda1c | 758 | .name = "keyspan_pda", |
18fcac35 | 759 | }, |
269bda1c | 760 | .description = "Keyspan PDA", |
1da177e4 | 761 | .id_table = id_table_std, |
1da177e4 | 762 | .num_ports = 1, |
335f8514 | 763 | .dtr_rts = keyspan_pda_dtr_rts, |
1da177e4 LT |
764 | .open = keyspan_pda_open, |
765 | .close = keyspan_pda_close, | |
766 | .write = keyspan_pda_write, | |
767 | .write_room = keyspan_pda_write_room, | |
768 | .write_bulk_callback = keyspan_pda_write_bulk_callback, | |
769 | .read_int_callback = keyspan_pda_rx_interrupt, | |
770 | .chars_in_buffer = keyspan_pda_chars_in_buffer, | |
771 | .throttle = keyspan_pda_rx_throttle, | |
772 | .unthrottle = keyspan_pda_rx_unthrottle, | |
1da177e4 LT |
773 | .set_termios = keyspan_pda_set_termios, |
774 | .break_ctl = keyspan_pda_break_ctl, | |
775 | .tiocmget = keyspan_pda_tiocmget, | |
776 | .tiocmset = keyspan_pda_tiocmset, | |
94ab71ce JH |
777 | .port_probe = keyspan_pda_port_probe, |
778 | .port_remove = keyspan_pda_port_remove, | |
1da177e4 LT |
779 | }; |
780 | ||
8c49fc99 GKH |
781 | static struct usb_serial_driver * const serial_drivers[] = { |
782 | &keyspan_pda_device, | |
1da177e4 | 783 | #ifdef KEYSPAN |
8c49fc99 | 784 | &keyspan_pda_fake_device, |
1da177e4 LT |
785 | #endif |
786 | #ifdef XIRCOM | |
8c49fc99 | 787 | &xircom_pgs_fake_device, |
1da177e4 | 788 | #endif |
8c49fc99 GKH |
789 | NULL |
790 | }; | |
1da177e4 | 791 | |
68e24113 | 792 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 793 | |
9e70f319 AC |
794 | MODULE_AUTHOR(DRIVER_AUTHOR); |
795 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 796 | MODULE_LICENSE("GPL"); |