Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
5f9f975b | 2 | * USB Keyspan PDA / Xircom / Entrega Converter driver |
1da177e4 LT |
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> | |
1da177e4 LT |
20 | #include <linux/slab.h> |
21 | #include <linux/tty.h> | |
22 | #include <linux/tty_driver.h> | |
23 | #include <linux/tty_flip.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/workqueue.h> | |
9e70f319 | 27 | #include <linux/uaccess.h> |
1da177e4 | 28 | #include <linux/usb.h> |
a969888c | 29 | #include <linux/usb/serial.h> |
cc183e2a | 30 | #include <linux/usb/ezusb.h> |
1da177e4 | 31 | |
1da177e4 | 32 | /* make a simple define to handle if we are compiling keyspan_pda or xircom support */ |
91956869 | 33 | #if IS_ENABLED(CONFIG_USB_SERIAL_KEYSPAN_PDA) |
1da177e4 LT |
34 | #define KEYSPAN |
35 | #else | |
36 | #undef KEYSPAN | |
37 | #endif | |
91956869 | 38 | #if IS_ENABLED(CONFIG_USB_SERIAL_XIRCOM) |
1da177e4 LT |
39 | #define XIRCOM |
40 | #else | |
41 | #undef XIRCOM | |
42 | #endif | |
43 | ||
1da177e4 LT |
44 | #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>" |
45 | #define DRIVER_DESC "USB Keyspan PDA Converter driver" | |
46 | ||
47 | struct keyspan_pda_private { | |
48 | int tx_room; | |
49 | int tx_throttled; | |
50 | struct work_struct wakeup_work; | |
51 | struct work_struct unthrottle_work; | |
c4028958 DH |
52 | struct usb_serial *serial; |
53 | struct usb_serial_port *port; | |
1da177e4 LT |
54 | }; |
55 | ||
56 | ||
57 | #define KEYSPAN_VENDOR_ID 0x06cd | |
58 | #define KEYSPAN_PDA_FAKE_ID 0x0103 | |
59 | #define KEYSPAN_PDA_ID 0x0104 /* no clue */ | |
60 | ||
5f9f975b | 61 | /* For Xircom PGSDB9 and older Entrega version of the same device */ |
1da177e4 LT |
62 | #define XIRCOM_VENDOR_ID 0x085a |
63 | #define XIRCOM_FAKE_ID 0x8027 | |
5e71fc86 | 64 | #define XIRCOM_FAKE_ID_2 0x8025 /* "PGMFHUB" serial */ |
5f9f975b MK |
65 | #define ENTREGA_VENDOR_ID 0x1645 |
66 | #define ENTREGA_FAKE_ID 0x8093 | |
1da177e4 | 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) }, | |
5e71fc86 | 74 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) }, |
5f9f975b | 75 | { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) }, |
1da177e4 LT |
76 | #endif |
77 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, | |
78 | { } /* Terminating entry */ | |
79 | }; | |
80 | ||
9e70f319 | 81 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 82 | |
7d40d7e8 | 83 | static const struct usb_device_id id_table_std[] = { |
1da177e4 LT |
84 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, |
85 | { } /* Terminating entry */ | |
86 | }; | |
87 | ||
88 | #ifdef KEYSPAN | |
7d40d7e8 | 89 | static const struct usb_device_id id_table_fake[] = { |
1da177e4 LT |
90 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, |
91 | { } /* Terminating entry */ | |
92 | }; | |
93 | #endif | |
94 | ||
95 | #ifdef XIRCOM | |
7d40d7e8 | 96 | static const struct usb_device_id id_table_fake_xircom[] = { |
9e70f319 | 97 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, |
5e71fc86 | 98 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) }, |
5f9f975b | 99 | { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) }, |
9e70f319 | 100 | { } |
1da177e4 LT |
101 | }; |
102 | #endif | |
103 | ||
c4028958 | 104 | static void keyspan_pda_wakeup_write(struct work_struct *work) |
1da177e4 | 105 | { |
c4028958 DH |
106 | struct keyspan_pda_private *priv = |
107 | container_of(work, struct keyspan_pda_private, wakeup_work); | |
108 | struct usb_serial_port *port = priv->port; | |
6aad04f2 JS |
109 | |
110 | tty_port_tty_wakeup(&port->port); | |
1da177e4 LT |
111 | } |
112 | ||
c4028958 | 113 | static void keyspan_pda_request_unthrottle(struct work_struct *work) |
1da177e4 | 114 | { |
c4028958 DH |
115 | struct keyspan_pda_private *priv = |
116 | container_of(work, struct keyspan_pda_private, unthrottle_work); | |
117 | struct usb_serial *serial = priv->serial; | |
1da177e4 LT |
118 | int result; |
119 | ||
1da177e4 LT |
120 | /* ask the device to tell us when the tx buffer becomes |
121 | sufficiently empty */ | |
9e70f319 | 122 | result = usb_control_msg(serial->dev, |
1da177e4 LT |
123 | usb_sndctrlpipe(serial->dev, 0), |
124 | 7, /* request_unthrottle */ | |
125 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
126 | | USB_DIR_OUT, | |
127 | 16, /* value: threshold */ | |
128 | 0, /* index */ | |
129 | NULL, | |
130 | 0, | |
131 | 2000); | |
132 | if (result < 0) | |
826575fc GKH |
133 | dev_dbg(&serial->dev->dev, "%s - error %d from usb_control_msg\n", |
134 | __func__, result); | |
1da177e4 LT |
135 | } |
136 | ||
137 | ||
9e70f319 | 138 | static void keyspan_pda_rx_interrupt(struct urb *urb) |
1da177e4 | 139 | { |
cdc97792 | 140 | struct usb_serial_port *port = urb->context; |
1da177e4 | 141 | unsigned char *data = urb->transfer_buffer; |
23189aee GKH |
142 | int retval; |
143 | int status = urb->status; | |
1da177e4 LT |
144 | struct keyspan_pda_private *priv; |
145 | priv = usb_get_serial_port_data(port); | |
146 | ||
23189aee | 147 | switch (status) { |
1da177e4 LT |
148 | case 0: |
149 | /* success */ | |
150 | break; | |
151 | case -ECONNRESET: | |
152 | case -ENOENT: | |
153 | case -ESHUTDOWN: | |
154 | /* this urb is terminated, clean up */ | |
826575fc | 155 | dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); |
f7d7aedf | 156 | return; |
1da177e4 | 157 | default: |
826575fc | 158 | dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
1da177e4 LT |
159 | goto exit; |
160 | } | |
161 | ||
9e70f319 | 162 | /* see if the message is data or a status interrupt */ |
1da177e4 LT |
163 | switch (data[0]) { |
164 | case 0: | |
f7d7aedf | 165 | /* rest of message is rx data */ |
2e124b4a | 166 | if (urb->actual_length) { |
05c7cd39 | 167 | tty_insert_flip_string(&port->port, data + 1, |
8dd03a5b | 168 | urb->actual_length - 1); |
2e124b4a | 169 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
170 | } |
171 | break; | |
172 | case 1: | |
173 | /* status interrupt */ | |
826575fc | 174 | dev_dbg(&port->dev, "rx int, d1=%d, d2=%d\n", data[1], data[2]); |
1da177e4 LT |
175 | switch (data[1]) { |
176 | case 1: /* modemline change */ | |
177 | break; | |
178 | case 2: /* tx unthrottle interrupt */ | |
179 | priv->tx_throttled = 0; | |
180 | /* queue up a wakeup at scheduler time */ | |
181 | schedule_work(&priv->wakeup_work); | |
182 | break; | |
183 | default: | |
184 | break; | |
185 | } | |
186 | break; | |
187 | default: | |
188 | break; | |
189 | } | |
190 | ||
191 | exit: | |
9e70f319 | 192 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
23189aee | 193 | if (retval) |
4a90f09b | 194 | dev_err(&port->dev, |
d9a38a87 | 195 | "%s - usb_submit_urb failed with result %d\n", |
4a90f09b | 196 | __func__, retval); |
1da177e4 LT |
197 | } |
198 | ||
199 | ||
95da310e | 200 | static void keyspan_pda_rx_throttle(struct tty_struct *tty) |
1da177e4 LT |
201 | { |
202 | /* stop receiving characters. We just turn off the URB request, and | |
203 | let chars pile up in the device. If we're doing hardware | |
204 | flowcontrol, the device will signal the other end when its buffer | |
205 | fills up. If we're doing XON/XOFF, this would be a good time to | |
206 | send an XOFF, although it might make sense to foist that off | |
207 | upon the device too. */ | |
95da310e | 208 | struct usb_serial_port *port = tty->driver_data; |
5542cf79 | 209 | |
1da177e4 LT |
210 | usb_kill_urb(port->interrupt_in_urb); |
211 | } | |
212 | ||
213 | ||
95da310e | 214 | static void keyspan_pda_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 215 | { |
95da310e | 216 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 217 | /* just restart the receive interrupt URB */ |
5542cf79 | 218 | |
63832515 | 219 | if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL)) |
826575fc | 220 | dev_dbg(&port->dev, "usb_submit_urb(read urb) failed\n"); |
1da177e4 LT |
221 | } |
222 | ||
223 | ||
9e70f319 | 224 | static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud) |
1da177e4 LT |
225 | { |
226 | int rc; | |
227 | int bindex; | |
228 | ||
9e70f319 AC |
229 | switch (baud) { |
230 | case 110: | |
231 | bindex = 0; | |
232 | break; | |
233 | case 300: | |
234 | bindex = 1; | |
235 | break; | |
236 | case 1200: | |
237 | bindex = 2; | |
238 | break; | |
239 | case 2400: | |
240 | bindex = 3; | |
241 | break; | |
242 | case 4800: | |
243 | bindex = 4; | |
244 | break; | |
245 | case 9600: | |
246 | bindex = 5; | |
247 | break; | |
248 | case 19200: | |
249 | bindex = 6; | |
250 | break; | |
251 | case 38400: | |
252 | bindex = 7; | |
253 | break; | |
254 | case 57600: | |
255 | bindex = 8; | |
256 | break; | |
257 | case 115200: | |
258 | bindex = 9; | |
259 | break; | |
260 | default: | |
261 | bindex = 5; /* Default to 9600 */ | |
262 | baud = 9600; | |
1da177e4 LT |
263 | } |
264 | ||
265 | /* rather than figure out how to sleep while waiting for this | |
266 | to complete, I just use the "legacy" API. */ | |
267 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
268 | 0, /* set baud */ | |
9e70f319 | 269 | USB_TYPE_VENDOR |
1da177e4 LT |
270 | | USB_RECIP_INTERFACE |
271 | | USB_DIR_OUT, /* type */ | |
272 | bindex, /* value */ | |
273 | 0, /* index */ | |
274 | NULL, /* &data */ | |
275 | 0, /* size */ | |
276 | 2000); /* timeout */ | |
e7806e36 AC |
277 | if (rc < 0) |
278 | return 0; | |
279 | return baud; | |
1da177e4 LT |
280 | } |
281 | ||
282 | ||
95da310e | 283 | static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 284 | { |
95da310e | 285 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
286 | struct usb_serial *serial = port->serial; |
287 | int value; | |
288 | int result; | |
289 | ||
290 | if (break_state == -1) | |
291 | value = 1; /* start break */ | |
292 | else | |
293 | value = 0; /* clear break */ | |
294 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
9e70f319 AC |
295 | 4, /* set break */ |
296 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
297 | value, 0, NULL, 0, 2000); | |
1da177e4 | 298 | if (result < 0) |
826575fc GKH |
299 | dev_dbg(&port->dev, "%s - error %d from usb_control_msg\n", |
300 | __func__, result); | |
1da177e4 LT |
301 | /* there is something funky about this.. the TCSBRK that 'cu' performs |
302 | ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4 | |
303 | seconds apart, but it feels like the break sent isn't as long as it | |
304 | is on /dev/ttyS0 */ | |
305 | } | |
306 | ||
307 | ||
95da310e AC |
308 | static void keyspan_pda_set_termios(struct tty_struct *tty, |
309 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
310 | { |
311 | struct usb_serial *serial = port->serial; | |
e7806e36 | 312 | speed_t speed; |
1da177e4 LT |
313 | |
314 | /* cflag specifies lots of stuff: number of stop bits, parity, number | |
315 | of data bits, baud. What can the device actually handle?: | |
316 | CSTOPB (1 stop bit or 2) | |
317 | PARENB (parity) | |
318 | CSIZE (5bit .. 8bit) | |
319 | There is minimal hw support for parity (a PSW bit seems to hold the | |
320 | parity of whatever is in the accumulator). The UART either deals | |
321 | with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data, | |
322 | 1 special, stop). So, with firmware changes, we could do: | |
323 | 8N1: 10 bit | |
324 | 8N2: 11 bit, extra bit always (mark?) | |
325 | 8[EOMS]1: 11 bit, extra bit is parity | |
326 | 7[EOMS]1: 10 bit, b0/b7 is parity | |
327 | 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?) | |
328 | ||
adc8d746 | 329 | HW flow control is dictated by the tty->termios.c_cflags & CRTSCTS |
1da177e4 LT |
330 | bit. |
331 | ||
332 | For now, just do baud. */ | |
333 | ||
95da310e | 334 | speed = tty_get_baud_rate(tty); |
e7806e36 AC |
335 | speed = keyspan_pda_setbaud(serial, speed); |
336 | ||
337 | if (speed == 0) { | |
826575fc | 338 | dev_dbg(&port->dev, "can't handle requested baud rate\n"); |
e7806e36 AC |
339 | /* It hasn't changed so.. */ |
340 | speed = tty_termios_baud_rate(old_termios); | |
1da177e4 | 341 | } |
e7806e36 AC |
342 | /* Only speed can change so copy the old h/w parameters |
343 | then encode the new speed */ | |
adc8d746 | 344 | tty_termios_copy_hw(&tty->termios, old_termios); |
95da310e | 345 | tty_encode_baud_rate(tty, speed, speed); |
1da177e4 LT |
346 | } |
347 | ||
348 | ||
349 | /* modem control pins: DTR and RTS are outputs and can be controlled. | |
350 | DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be | |
351 | read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */ | |
352 | ||
353 | static int keyspan_pda_get_modem_info(struct usb_serial *serial, | |
354 | unsigned char *value) | |
355 | { | |
356 | int rc; | |
ca65d256 JH |
357 | u8 *data; |
358 | ||
359 | data = kmalloc(1, GFP_KERNEL); | |
360 | if (!data) | |
361 | return -ENOMEM; | |
362 | ||
1da177e4 LT |
363 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
364 | 3, /* get pins */ | |
365 | USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN, | |
ca65d256 | 366 | 0, 0, data, 1, 2000); |
3b36a8fd | 367 | if (rc >= 0) |
ca65d256 JH |
368 | *value = *data; |
369 | ||
370 | kfree(data); | |
1da177e4 LT |
371 | return rc; |
372 | } | |
373 | ||
374 | ||
375 | static int keyspan_pda_set_modem_info(struct usb_serial *serial, | |
376 | unsigned char value) | |
377 | { | |
378 | int rc; | |
379 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
380 | 3, /* set pins */ | |
381 | USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT, | |
382 | value, 0, NULL, 0, 2000); | |
383 | return rc; | |
384 | } | |
385 | ||
60b33c13 | 386 | static int keyspan_pda_tiocmget(struct tty_struct *tty) |
1da177e4 | 387 | { |
95da310e | 388 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
389 | struct usb_serial *serial = port->serial; |
390 | int rc; | |
391 | unsigned char status; | |
392 | int value; | |
393 | ||
394 | rc = keyspan_pda_get_modem_info(serial, &status); | |
395 | if (rc < 0) | |
396 | return rc; | |
397 | value = | |
398 | ((status & (1<<7)) ? TIOCM_DTR : 0) | | |
399 | ((status & (1<<6)) ? TIOCM_CAR : 0) | | |
400 | ((status & (1<<5)) ? TIOCM_RNG : 0) | | |
401 | ((status & (1<<4)) ? TIOCM_DSR : 0) | | |
402 | ((status & (1<<3)) ? TIOCM_CTS : 0) | | |
403 | ((status & (1<<2)) ? TIOCM_RTS : 0); | |
404 | return value; | |
405 | } | |
406 | ||
20b9d177 | 407 | static int keyspan_pda_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
408 | unsigned int set, unsigned int clear) |
409 | { | |
95da310e | 410 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
411 | struct usb_serial *serial = port->serial; |
412 | int rc; | |
413 | unsigned char status; | |
414 | ||
415 | rc = keyspan_pda_get_modem_info(serial, &status); | |
416 | if (rc < 0) | |
417 | return rc; | |
418 | ||
419 | if (set & TIOCM_RTS) | |
420 | status |= (1<<2); | |
421 | if (set & TIOCM_DTR) | |
422 | status |= (1<<7); | |
423 | ||
424 | if (clear & TIOCM_RTS) | |
425 | status &= ~(1<<2); | |
426 | if (clear & TIOCM_DTR) | |
427 | status &= ~(1<<7); | |
428 | rc = keyspan_pda_set_modem_info(serial, status); | |
429 | return rc; | |
430 | } | |
431 | ||
95da310e AC |
432 | static int keyspan_pda_write(struct tty_struct *tty, |
433 | struct usb_serial_port *port, const unsigned char *buf, int count) | |
1da177e4 LT |
434 | { |
435 | struct usb_serial *serial = port->serial; | |
436 | int request_unthrottle = 0; | |
437 | int rc = 0; | |
438 | struct keyspan_pda_private *priv; | |
439 | ||
440 | priv = usb_get_serial_port_data(port); | |
441 | /* guess how much room is left in the device's ring buffer, and if we | |
442 | want to send more than that, check first, updating our notion of | |
443 | what is left. If our write will result in no room left, ask the | |
444 | device to give us an interrupt when the room available rises above | |
445 | a threshold, and hold off all writers (eventually, those using | |
446 | select() or poll() too) until we receive that unthrottle interrupt. | |
447 | Block if we can't write anything at all, otherwise write as much as | |
448 | we can. */ | |
1da177e4 | 449 | if (count == 0) { |
826575fc | 450 | dev_dbg(&port->dev, "write request of 0 bytes\n"); |
9e70f319 | 451 | return 0; |
1da177e4 LT |
452 | } |
453 | ||
454 | /* we might block because of: | |
455 | the TX urb is in-flight (wait until it completes) | |
456 | the device is full (wait until it says there is room) | |
457 | */ | |
e81ee637 | 458 | spin_lock_bh(&port->lock); |
da280e34 | 459 | if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) { |
e81ee637 | 460 | spin_unlock_bh(&port->lock); |
507ca9bc | 461 | return 0; |
1da177e4 | 462 | } |
da280e34 | 463 | clear_bit(0, &port->write_urbs_free); |
e81ee637 | 464 | spin_unlock_bh(&port->lock); |
1da177e4 LT |
465 | |
466 | /* At this point the URB is in our control, nobody else can submit it | |
467 | again (the only sudden transition was the one from EINPROGRESS to | |
468 | finished). Also, the tx process is not throttled. So we are | |
469 | ready to write. */ | |
470 | ||
471 | count = (count > port->bulk_out_size) ? port->bulk_out_size : count; | |
472 | ||
473 | /* Check if we might overrun the Tx buffer. If so, ask the | |
474 | device how much room it really has. This is done only on | |
475 | scheduler time, since usb_control_msg() sleeps. */ | |
476 | if (count > priv->tx_room && !in_interrupt()) { | |
ca65d256 JH |
477 | u8 *room; |
478 | ||
479 | room = kmalloc(1, GFP_KERNEL); | |
480 | if (!room) { | |
481 | rc = -ENOMEM; | |
482 | goto exit; | |
483 | } | |
484 | ||
9e70f319 | 485 | rc = usb_control_msg(serial->dev, |
1da177e4 LT |
486 | usb_rcvctrlpipe(serial->dev, 0), |
487 | 6, /* write_room */ | |
488 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
489 | | USB_DIR_IN, | |
490 | 0, /* value: 0 means "remaining room" */ | |
491 | 0, /* index */ | |
ca65d256 | 492 | room, |
1da177e4 LT |
493 | 1, |
494 | 2000); | |
ca65d256 | 495 | if (rc > 0) { |
826575fc | 496 | dev_dbg(&port->dev, "roomquery says %d\n", *room); |
ca65d256 JH |
497 | priv->tx_room = *room; |
498 | } | |
499 | kfree(room); | |
1da177e4 | 500 | if (rc < 0) { |
826575fc | 501 | dev_dbg(&port->dev, "roomquery failed\n"); |
1da177e4 LT |
502 | goto exit; |
503 | } | |
504 | if (rc == 0) { | |
826575fc | 505 | dev_dbg(&port->dev, "roomquery returned 0 bytes\n"); |
1da177e4 LT |
506 | rc = -EIO; /* device didn't return any data */ |
507 | goto exit; | |
508 | } | |
1da177e4 LT |
509 | } |
510 | if (count > priv->tx_room) { | |
511 | /* we're about to completely fill the Tx buffer, so | |
512 | we'll be throttled afterwards. */ | |
513 | count = priv->tx_room; | |
514 | request_unthrottle = 1; | |
515 | } | |
516 | ||
517 | if (count) { | |
518 | /* now transfer data */ | |
9e70f319 | 519 | memcpy(port->write_urb->transfer_buffer, buf, count); |
1da177e4 LT |
520 | /* send the data out the bulk port */ |
521 | port->write_urb->transfer_buffer_length = count; | |
507ca9bc | 522 | |
1da177e4 LT |
523 | priv->tx_room -= count; |
524 | ||
1da177e4 LT |
525 | rc = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
526 | if (rc) { | |
826575fc | 527 | dev_dbg(&port->dev, "usb_submit_urb(write bulk) failed\n"); |
1da177e4 LT |
528 | goto exit; |
529 | } | |
9e70f319 | 530 | } else { |
1da177e4 LT |
531 | /* There wasn't any room left, so we are throttled until |
532 | the buffer empties a bit */ | |
533 | request_unthrottle = 1; | |
534 | } | |
535 | ||
536 | if (request_unthrottle) { | |
537 | priv->tx_throttled = 1; /* block writers */ | |
538 | schedule_work(&priv->unthrottle_work); | |
539 | } | |
540 | ||
541 | rc = count; | |
542 | exit: | |
507ca9bc | 543 | if (rc < 0) |
da280e34 | 544 | set_bit(0, &port->write_urbs_free); |
1da177e4 LT |
545 | return rc; |
546 | } | |
547 | ||
548 | ||
9e70f319 | 549 | static void keyspan_pda_write_bulk_callback(struct urb *urb) |
1da177e4 | 550 | { |
cdc97792 | 551 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
552 | struct keyspan_pda_private *priv; |
553 | ||
da280e34 | 554 | set_bit(0, &port->write_urbs_free); |
1da177e4 LT |
555 | priv = usb_get_serial_port_data(port); |
556 | ||
557 | /* queue up a wakeup at scheduler time */ | |
558 | schedule_work(&priv->wakeup_work); | |
559 | } | |
560 | ||
561 | ||
95da310e | 562 | static int keyspan_pda_write_room(struct tty_struct *tty) |
1da177e4 | 563 | { |
95da310e | 564 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 565 | struct keyspan_pda_private *priv; |
1da177e4 | 566 | priv = usb_get_serial_port_data(port); |
1da177e4 LT |
567 | /* used by n_tty.c for processing of tabs and such. Giving it our |
568 | conservative guess is probably good enough, but needs testing by | |
569 | running a console through the device. */ | |
9e70f319 | 570 | return priv->tx_room; |
1da177e4 LT |
571 | } |
572 | ||
573 | ||
95da310e | 574 | static int keyspan_pda_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 575 | { |
95da310e | 576 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 577 | struct keyspan_pda_private *priv; |
a5b6f60c AC |
578 | unsigned long flags; |
579 | int ret = 0; | |
507ca9bc | 580 | |
1da177e4 | 581 | priv = usb_get_serial_port_data(port); |
507ca9bc | 582 | |
1da177e4 LT |
583 | /* when throttled, return at least WAKEUP_CHARS to tell select() (via |
584 | n_tty.c:normal_poll() ) that we're not writeable. */ | |
a5b6f60c AC |
585 | |
586 | spin_lock_irqsave(&port->lock, flags); | |
da280e34 | 587 | if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) |
a5b6f60c AC |
588 | ret = 256; |
589 | spin_unlock_irqrestore(&port->lock, flags); | |
590 | return ret; | |
1da177e4 LT |
591 | } |
592 | ||
593 | ||
335f8514 AC |
594 | static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on) |
595 | { | |
596 | struct usb_serial *serial = port->serial; | |
597 | ||
d7f08452 JH |
598 | if (on) |
599 | keyspan_pda_set_modem_info(serial, (1 << 7) | (1 << 2)); | |
600 | else | |
601 | keyspan_pda_set_modem_info(serial, 0); | |
335f8514 AC |
602 | } |
603 | ||
335f8514 | 604 | |
95da310e | 605 | static int keyspan_pda_open(struct tty_struct *tty, |
a509a7e4 | 606 | struct usb_serial_port *port) |
1da177e4 LT |
607 | { |
608 | struct usb_serial *serial = port->serial; | |
ca65d256 | 609 | u8 *room; |
1da177e4 LT |
610 | int rc = 0; |
611 | struct keyspan_pda_private *priv; | |
612 | ||
613 | /* find out how much room is in the Tx ring */ | |
ca65d256 JH |
614 | room = kmalloc(1, GFP_KERNEL); |
615 | if (!room) | |
616 | return -ENOMEM; | |
617 | ||
1da177e4 LT |
618 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
619 | 6, /* write_room */ | |
620 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
621 | | USB_DIR_IN, | |
622 | 0, /* value */ | |
623 | 0, /* index */ | |
ca65d256 | 624 | room, |
1da177e4 LT |
625 | 1, |
626 | 2000); | |
627 | if (rc < 0) { | |
826575fc | 628 | dev_dbg(&port->dev, "%s - roomquery failed\n", __func__); |
1da177e4 LT |
629 | goto error; |
630 | } | |
631 | if (rc == 0) { | |
826575fc | 632 | dev_dbg(&port->dev, "%s - roomquery returned 0 bytes\n", __func__); |
1da177e4 LT |
633 | rc = -EIO; |
634 | goto error; | |
635 | } | |
636 | priv = usb_get_serial_port_data(port); | |
ca65d256 JH |
637 | priv->tx_room = *room; |
638 | priv->tx_throttled = *room ? 0 : 1; | |
1da177e4 | 639 | |
1da177e4 | 640 | /*Start reading from the device*/ |
1da177e4 LT |
641 | rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
642 | if (rc) { | |
826575fc | 643 | dev_dbg(&port->dev, "%s - usb_submit_urb(read int) failed\n", __func__); |
1da177e4 LT |
644 | goto error; |
645 | } | |
1da177e4 | 646 | error: |
ca65d256 | 647 | kfree(room); |
1da177e4 LT |
648 | return rc; |
649 | } | |
335f8514 | 650 | static void keyspan_pda_close(struct usb_serial_port *port) |
1da177e4 | 651 | { |
75d22b32 JH |
652 | usb_kill_urb(port->write_urb); |
653 | usb_kill_urb(port->interrupt_in_urb); | |
1da177e4 LT |
654 | } |
655 | ||
656 | ||
657 | /* download the firmware to a "fake" device (pre-renumeration) */ | |
9e70f319 | 658 | static int keyspan_pda_fake_startup(struct usb_serial *serial) |
1da177e4 LT |
659 | { |
660 | int response; | |
3edbf98b | 661 | const char *fw_name; |
1da177e4 LT |
662 | |
663 | /* download the firmware here ... */ | |
cc183e2a | 664 | response = ezusb_fx1_set_reset(serial->dev, 1); |
1da177e4 | 665 | |
3edbf98b | 666 | if (0) { ; } |
1da177e4 | 667 | #ifdef KEYSPAN |
3edbf98b DW |
668 | else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID) |
669 | fw_name = "keyspan_pda/keyspan_pda.fw"; | |
1da177e4 LT |
670 | #endif |
671 | #ifdef XIRCOM | |
3edbf98b | 672 | else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) || |
5f9f975b | 673 | (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGA_VENDOR_ID)) |
3edbf98b | 674 | fw_name = "keyspan_pda/xircom_pgs.fw"; |
1da177e4 | 675 | #endif |
3edbf98b | 676 | else { |
194343d9 GKH |
677 | dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n", |
678 | __func__); | |
1da177e4 LT |
679 | return -ENODEV; |
680 | } | |
8d733e26 RB |
681 | |
682 | if (ezusb_fx1_ihex_firmware_download(serial->dev, fw_name) < 0) { | |
194343d9 GKH |
683 | dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n", |
684 | fw_name); | |
3edbf98b DW |
685 | return -ENOENT; |
686 | } | |
8d733e26 RB |
687 | |
688 | /* after downloading firmware Renumeration will occur in a | |
689 | moment and the new device will bind to the real driver */ | |
1da177e4 LT |
690 | |
691 | /* we want this device to fail to have a driver assigned to it. */ | |
9e70f319 | 692 | return 1; |
1da177e4 LT |
693 | } |
694 | ||
e6c4ef98 BH |
695 | #ifdef KEYSPAN |
696 | MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw"); | |
697 | #endif | |
698 | #ifdef XIRCOM | |
699 | MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw"); | |
700 | #endif | |
701 | ||
94ab71ce | 702 | static int keyspan_pda_port_probe(struct usb_serial_port *port) |
1da177e4 LT |
703 | { |
704 | ||
705 | struct keyspan_pda_private *priv; | |
706 | ||
1da177e4 LT |
707 | priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL); |
708 | if (!priv) | |
94ab71ce JH |
709 | return -ENOMEM; |
710 | ||
c4028958 DH |
711 | INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write); |
712 | INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle); | |
94ab71ce JH |
713 | priv->serial = port->serial; |
714 | priv->port = port; | |
715 | ||
716 | usb_set_serial_port_data(port, priv); | |
717 | ||
9e70f319 | 718 | return 0; |
1da177e4 LT |
719 | } |
720 | ||
94ab71ce | 721 | static int keyspan_pda_port_remove(struct usb_serial_port *port) |
1da177e4 | 722 | { |
94ab71ce JH |
723 | struct keyspan_pda_private *priv; |
724 | ||
725 | priv = usb_get_serial_port_data(port); | |
726 | kfree(priv); | |
727 | ||
728 | return 0; | |
1da177e4 LT |
729 | } |
730 | ||
731 | #ifdef KEYSPAN | |
ea65370d | 732 | static struct usb_serial_driver keyspan_pda_fake_device = { |
18fcac35 GKH |
733 | .driver = { |
734 | .owner = THIS_MODULE, | |
269bda1c | 735 | .name = "keyspan_pda_pre", |
18fcac35 | 736 | }, |
269bda1c | 737 | .description = "Keyspan PDA - (prerenumeration)", |
1da177e4 | 738 | .id_table = id_table_fake, |
1da177e4 LT |
739 | .num_ports = 1, |
740 | .attach = keyspan_pda_fake_startup, | |
741 | }; | |
742 | #endif | |
743 | ||
744 | #ifdef XIRCOM | |
ea65370d | 745 | static struct usb_serial_driver xircom_pgs_fake_device = { |
18fcac35 GKH |
746 | .driver = { |
747 | .owner = THIS_MODULE, | |
269bda1c | 748 | .name = "xircom_no_firm", |
18fcac35 | 749 | }, |
5f9f975b | 750 | .description = "Xircom / Entrega PGS - (prerenumeration)", |
1da177e4 | 751 | .id_table = id_table_fake_xircom, |
1da177e4 LT |
752 | .num_ports = 1, |
753 | .attach = keyspan_pda_fake_startup, | |
754 | }; | |
755 | #endif | |
756 | ||
ea65370d | 757 | static struct usb_serial_driver keyspan_pda_device = { |
18fcac35 GKH |
758 | .driver = { |
759 | .owner = THIS_MODULE, | |
269bda1c | 760 | .name = "keyspan_pda", |
18fcac35 | 761 | }, |
269bda1c | 762 | .description = "Keyspan PDA", |
1da177e4 | 763 | .id_table = id_table_std, |
1da177e4 | 764 | .num_ports = 1, |
335f8514 | 765 | .dtr_rts = keyspan_pda_dtr_rts, |
1da177e4 LT |
766 | .open = keyspan_pda_open, |
767 | .close = keyspan_pda_close, | |
768 | .write = keyspan_pda_write, | |
769 | .write_room = keyspan_pda_write_room, | |
770 | .write_bulk_callback = keyspan_pda_write_bulk_callback, | |
771 | .read_int_callback = keyspan_pda_rx_interrupt, | |
772 | .chars_in_buffer = keyspan_pda_chars_in_buffer, | |
773 | .throttle = keyspan_pda_rx_throttle, | |
774 | .unthrottle = keyspan_pda_rx_unthrottle, | |
1da177e4 LT |
775 | .set_termios = keyspan_pda_set_termios, |
776 | .break_ctl = keyspan_pda_break_ctl, | |
777 | .tiocmget = keyspan_pda_tiocmget, | |
778 | .tiocmset = keyspan_pda_tiocmset, | |
94ab71ce JH |
779 | .port_probe = keyspan_pda_port_probe, |
780 | .port_remove = keyspan_pda_port_remove, | |
1da177e4 LT |
781 | }; |
782 | ||
8c49fc99 GKH |
783 | static struct usb_serial_driver * const serial_drivers[] = { |
784 | &keyspan_pda_device, | |
1da177e4 | 785 | #ifdef KEYSPAN |
8c49fc99 | 786 | &keyspan_pda_fake_device, |
1da177e4 LT |
787 | #endif |
788 | #ifdef XIRCOM | |
8c49fc99 | 789 | &xircom_pgs_fake_device, |
1da177e4 | 790 | #endif |
8c49fc99 GKH |
791 | NULL |
792 | }; | |
1da177e4 | 793 | |
68e24113 | 794 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 795 | |
9e70f319 AC |
796 | MODULE_AUTHOR(DRIVER_AUTHOR); |
797 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 798 | MODULE_LICENSE("GPL"); |