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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 | |
15 | * | |
1da177e4 LT |
16 | * (09/07/2001) gkh |
17 | * cleaned up the Xircom support. Added ids for Entregra device which is | |
18 | * the same as the Xircom device. Enabled the code to be compiled for | |
19 | * either Xircom or Keyspan devices. | |
20 | * | |
21 | * (08/11/2001) Cristian M. Craciunescu | |
22 | * support for Xircom PGSDB9 | |
23 | * | |
24 | * (05/31/2001) gkh | |
9e70f319 AC |
25 | * switched from using spinlock to a semaphore, which fixes lots of |
26 | * problems. | |
1da177e4 LT |
27 | * |
28 | * (04/08/2001) gb | |
29 | * Identify version on module load. | |
9e70f319 | 30 | * |
1da177e4 LT |
31 | * (11/01/2000) Adam J. Richter |
32 | * usb_device_id table support | |
9e70f319 | 33 | * |
1da177e4 LT |
34 | * (10/05/2000) gkh |
35 | * Fixed bug with urb->dev not being set properly, now that the usb | |
36 | * core needs it. | |
9e70f319 | 37 | * |
1da177e4 LT |
38 | * (08/28/2000) gkh |
39 | * Added locks for SMP safeness. | |
9e70f319 | 40 | * Fixed MOD_INC and MOD_DEC logic and the ability to open a port more |
1da177e4 | 41 | * than once. |
9e70f319 | 42 | * |
1da177e4 LT |
43 | * (07/20/2000) borchers |
44 | * - keyspan_pda_write no longer sleeps if it is called on interrupt time; | |
45 | * PPP and the line discipline with stty echo on can call write on | |
46 | * interrupt time and this would cause an oops if write slept | |
47 | * - if keyspan_pda_write is in an interrupt, it will not call | |
48 | * usb_control_msg (which sleeps) to query the room in the device | |
49 | * buffer, it simply uses the current room value it has | |
50 | * - if the urb is busy or if it is throttled keyspan_pda_write just | |
51 | * returns 0, rather than sleeping to wait for this to change; the | |
52 | * write_chan code in n_tty.c will sleep if needed before calling | |
53 | * keyspan_pda_write again | |
54 | * - if the device needs to be unthrottled, write now queues up the | |
55 | * call to usb_control_msg (which sleeps) to unthrottle the device | |
56 | * - the wakeups from keyspan_pda_write_bulk_callback are queued rather | |
57 | * than done directly from the callback to avoid the race in write_chan | |
58 | * - keyspan_pda_chars_in_buffer also indicates its buffer is full if the | |
59 | * urb status is -EINPROGRESS, meaning it cannot write at the moment | |
9e70f319 | 60 | * |
1da177e4 LT |
61 | * (07/19/2000) gkh |
62 | * Added module_init and module_exit functions to handle the fact that this | |
63 | * driver is a loadable module now. | |
64 | * | |
65 | * (03/26/2000) gkh | |
66 | * Split driver up into device specific pieces. | |
9e70f319 | 67 | * |
1da177e4 LT |
68 | */ |
69 | ||
70 | ||
1da177e4 LT |
71 | #include <linux/kernel.h> |
72 | #include <linux/errno.h> | |
73 | #include <linux/init.h> | |
74 | #include <linux/slab.h> | |
75 | #include <linux/tty.h> | |
76 | #include <linux/tty_driver.h> | |
77 | #include <linux/tty_flip.h> | |
78 | #include <linux/module.h> | |
79 | #include <linux/spinlock.h> | |
80 | #include <linux/workqueue.h> | |
3edbf98b DW |
81 | #include <linux/firmware.h> |
82 | #include <linux/ihex.h> | |
9e70f319 | 83 | #include <linux/uaccess.h> |
1da177e4 | 84 | #include <linux/usb.h> |
a969888c | 85 | #include <linux/usb/serial.h> |
1da177e4 LT |
86 | |
87 | static int debug; | |
88 | ||
1da177e4 LT |
89 | /* make a simple define to handle if we are compiling keyspan_pda or xircom support */ |
90 | #if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE) | |
91 | #define KEYSPAN | |
92 | #else | |
93 | #undef KEYSPAN | |
94 | #endif | |
95 | #if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE) | |
96 | #define XIRCOM | |
97 | #else | |
98 | #undef XIRCOM | |
99 | #endif | |
100 | ||
1da177e4 LT |
101 | /* |
102 | * Version Information | |
103 | */ | |
104 | #define DRIVER_VERSION "v1.1" | |
105 | #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>" | |
106 | #define DRIVER_DESC "USB Keyspan PDA Converter driver" | |
107 | ||
108 | struct keyspan_pda_private { | |
109 | int tx_room; | |
110 | int tx_throttled; | |
111 | struct work_struct wakeup_work; | |
112 | struct work_struct unthrottle_work; | |
c4028958 DH |
113 | struct usb_serial *serial; |
114 | struct usb_serial_port *port; | |
1da177e4 LT |
115 | }; |
116 | ||
117 | ||
118 | #define KEYSPAN_VENDOR_ID 0x06cd | |
119 | #define KEYSPAN_PDA_FAKE_ID 0x0103 | |
120 | #define KEYSPAN_PDA_ID 0x0104 /* no clue */ | |
121 | ||
122 | /* For Xircom PGSDB9 and older Entregra version of the same device */ | |
123 | #define XIRCOM_VENDOR_ID 0x085a | |
124 | #define XIRCOM_FAKE_ID 0x8027 | |
125 | #define ENTREGRA_VENDOR_ID 0x1645 | |
126 | #define ENTREGRA_FAKE_ID 0x8093 | |
127 | ||
7d40d7e8 | 128 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
129 | #ifdef KEYSPAN |
130 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, | |
131 | #endif | |
132 | #ifdef XIRCOM | |
133 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, | |
134 | { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) }, | |
135 | #endif | |
136 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, | |
137 | { } /* Terminating entry */ | |
138 | }; | |
139 | ||
9e70f319 | 140 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
141 | |
142 | static struct usb_driver keyspan_pda_driver = { | |
1da177e4 LT |
143 | .name = "keyspan_pda", |
144 | .probe = usb_serial_probe, | |
145 | .disconnect = usb_serial_disconnect, | |
146 | .id_table = id_table_combined, | |
ba9dc657 | 147 | .no_dynamic_id = 1, |
1da177e4 LT |
148 | }; |
149 | ||
7d40d7e8 | 150 | static const struct usb_device_id id_table_std[] = { |
1da177e4 LT |
151 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) }, |
152 | { } /* Terminating entry */ | |
153 | }; | |
154 | ||
155 | #ifdef KEYSPAN | |
7d40d7e8 | 156 | static const struct usb_device_id id_table_fake[] = { |
1da177e4 LT |
157 | { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) }, |
158 | { } /* Terminating entry */ | |
159 | }; | |
160 | #endif | |
161 | ||
162 | #ifdef XIRCOM | |
7d40d7e8 | 163 | static const struct usb_device_id id_table_fake_xircom[] = { |
9e70f319 AC |
164 | { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) }, |
165 | { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) }, | |
166 | { } | |
1da177e4 LT |
167 | }; |
168 | #endif | |
169 | ||
c4028958 | 170 | static void keyspan_pda_wakeup_write(struct work_struct *work) |
1da177e4 | 171 | { |
c4028958 DH |
172 | struct keyspan_pda_private *priv = |
173 | container_of(work, struct keyspan_pda_private, wakeup_work); | |
174 | struct usb_serial_port *port = priv->port; | |
4a90f09b AC |
175 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
176 | tty_wakeup(tty); | |
177 | tty_kref_put(tty); | |
1da177e4 LT |
178 | } |
179 | ||
c4028958 | 180 | static void keyspan_pda_request_unthrottle(struct work_struct *work) |
1da177e4 | 181 | { |
c4028958 DH |
182 | struct keyspan_pda_private *priv = |
183 | container_of(work, struct keyspan_pda_private, unthrottle_work); | |
184 | struct usb_serial *serial = priv->serial; | |
1da177e4 LT |
185 | int result; |
186 | ||
187 | dbg(" request_unthrottle"); | |
188 | /* ask the device to tell us when the tx buffer becomes | |
189 | sufficiently empty */ | |
9e70f319 | 190 | result = usb_control_msg(serial->dev, |
1da177e4 LT |
191 | usb_sndctrlpipe(serial->dev, 0), |
192 | 7, /* request_unthrottle */ | |
193 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
194 | | USB_DIR_OUT, | |
195 | 16, /* value: threshold */ | |
196 | 0, /* index */ | |
197 | NULL, | |
198 | 0, | |
199 | 2000); | |
200 | if (result < 0) | |
9e70f319 | 201 | dbg("%s - error %d from usb_control_msg", |
441b62c1 | 202 | __func__, result); |
1da177e4 LT |
203 | } |
204 | ||
205 | ||
9e70f319 | 206 | static void keyspan_pda_rx_interrupt(struct urb *urb) |
1da177e4 | 207 | { |
cdc97792 | 208 | struct usb_serial_port *port = urb->context; |
4a90f09b | 209 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1da177e4 | 210 | unsigned char *data = urb->transfer_buffer; |
23189aee GKH |
211 | int retval; |
212 | int status = urb->status; | |
1da177e4 LT |
213 | struct keyspan_pda_private *priv; |
214 | priv = usb_get_serial_port_data(port); | |
215 | ||
23189aee | 216 | switch (status) { |
1da177e4 LT |
217 | case 0: |
218 | /* success */ | |
219 | break; | |
220 | case -ECONNRESET: | |
221 | case -ENOENT: | |
222 | case -ESHUTDOWN: | |
223 | /* this urb is terminated, clean up */ | |
23189aee | 224 | dbg("%s - urb shutting down with status: %d", |
441b62c1 | 225 | __func__, status); |
4a90f09b | 226 | goto out; |
1da177e4 | 227 | default: |
23189aee | 228 | dbg("%s - nonzero urb status received: %d", |
441b62c1 | 229 | __func__, status); |
1da177e4 LT |
230 | goto exit; |
231 | } | |
232 | ||
9e70f319 | 233 | /* see if the message is data or a status interrupt */ |
1da177e4 LT |
234 | switch (data[0]) { |
235 | case 0: | |
236 | /* rest of message is rx data */ | |
237 | if (urb->actual_length) { | |
8dd03a5b AC |
238 | tty_insert_flip_string(tty, data + 1, |
239 | urb->actual_length - 1); | |
1da177e4 LT |
240 | tty_flip_buffer_push(tty); |
241 | } | |
242 | break; | |
243 | case 1: | |
244 | /* status interrupt */ | |
245 | dbg(" rx int, d1=%d, d2=%d", data[1], data[2]); | |
246 | switch (data[1]) { | |
247 | case 1: /* modemline change */ | |
248 | break; | |
249 | case 2: /* tx unthrottle interrupt */ | |
250 | priv->tx_throttled = 0; | |
251 | /* queue up a wakeup at scheduler time */ | |
252 | schedule_work(&priv->wakeup_work); | |
253 | break; | |
254 | default: | |
255 | break; | |
256 | } | |
257 | break; | |
258 | default: | |
259 | break; | |
260 | } | |
261 | ||
262 | exit: | |
9e70f319 | 263 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
23189aee | 264 | if (retval) |
4a90f09b AC |
265 | dev_err(&port->dev, |
266 | "%s - usb_submit_urb failed with result %d", | |
267 | __func__, retval); | |
268 | out: | |
269 | tty_kref_put(tty); | |
1da177e4 LT |
270 | } |
271 | ||
272 | ||
95da310e | 273 | static void keyspan_pda_rx_throttle(struct tty_struct *tty) |
1da177e4 LT |
274 | { |
275 | /* stop receiving characters. We just turn off the URB request, and | |
276 | let chars pile up in the device. If we're doing hardware | |
277 | flowcontrol, the device will signal the other end when its buffer | |
278 | fills up. If we're doing XON/XOFF, this would be a good time to | |
279 | send an XOFF, although it might make sense to foist that off | |
280 | upon the device too. */ | |
95da310e | 281 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
282 | dbg("keyspan_pda_rx_throttle port %d", port->number); |
283 | usb_kill_urb(port->interrupt_in_urb); | |
284 | } | |
285 | ||
286 | ||
95da310e | 287 | static void keyspan_pda_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 288 | { |
95da310e | 289 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
290 | /* just restart the receive interrupt URB */ |
291 | dbg("keyspan_pda_rx_unthrottle port %d", port->number); | |
292 | port->interrupt_in_urb->dev = port->serial->dev; | |
63832515 | 293 | if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL)) |
1da177e4 | 294 | dbg(" usb_submit_urb(read urb) failed"); |
1da177e4 LT |
295 | } |
296 | ||
297 | ||
9e70f319 | 298 | static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud) |
1da177e4 LT |
299 | { |
300 | int rc; | |
301 | int bindex; | |
302 | ||
9e70f319 AC |
303 | switch (baud) { |
304 | case 110: | |
305 | bindex = 0; | |
306 | break; | |
307 | case 300: | |
308 | bindex = 1; | |
309 | break; | |
310 | case 1200: | |
311 | bindex = 2; | |
312 | break; | |
313 | case 2400: | |
314 | bindex = 3; | |
315 | break; | |
316 | case 4800: | |
317 | bindex = 4; | |
318 | break; | |
319 | case 9600: | |
320 | bindex = 5; | |
321 | break; | |
322 | case 19200: | |
323 | bindex = 6; | |
324 | break; | |
325 | case 38400: | |
326 | bindex = 7; | |
327 | break; | |
328 | case 57600: | |
329 | bindex = 8; | |
330 | break; | |
331 | case 115200: | |
332 | bindex = 9; | |
333 | break; | |
334 | default: | |
335 | bindex = 5; /* Default to 9600 */ | |
336 | baud = 9600; | |
1da177e4 LT |
337 | } |
338 | ||
339 | /* rather than figure out how to sleep while waiting for this | |
340 | to complete, I just use the "legacy" API. */ | |
341 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
342 | 0, /* set baud */ | |
9e70f319 | 343 | USB_TYPE_VENDOR |
1da177e4 LT |
344 | | USB_RECIP_INTERFACE |
345 | | USB_DIR_OUT, /* type */ | |
346 | bindex, /* value */ | |
347 | 0, /* index */ | |
348 | NULL, /* &data */ | |
349 | 0, /* size */ | |
350 | 2000); /* timeout */ | |
e7806e36 AC |
351 | if (rc < 0) |
352 | return 0; | |
353 | return baud; | |
1da177e4 LT |
354 | } |
355 | ||
356 | ||
95da310e | 357 | static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 358 | { |
95da310e | 359 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
360 | struct usb_serial *serial = port->serial; |
361 | int value; | |
362 | int result; | |
363 | ||
364 | if (break_state == -1) | |
365 | value = 1; /* start break */ | |
366 | else | |
367 | value = 0; /* clear break */ | |
368 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
9e70f319 AC |
369 | 4, /* set break */ |
370 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT, | |
371 | value, 0, NULL, 0, 2000); | |
1da177e4 | 372 | if (result < 0) |
9e70f319 | 373 | dbg("%s - error %d from usb_control_msg", |
441b62c1 | 374 | __func__, result); |
1da177e4 LT |
375 | /* there is something funky about this.. the TCSBRK that 'cu' performs |
376 | ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4 | |
377 | seconds apart, but it feels like the break sent isn't as long as it | |
378 | is on /dev/ttyS0 */ | |
379 | } | |
380 | ||
381 | ||
95da310e AC |
382 | static void keyspan_pda_set_termios(struct tty_struct *tty, |
383 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
384 | { |
385 | struct usb_serial *serial = port->serial; | |
e7806e36 | 386 | speed_t speed; |
1da177e4 LT |
387 | |
388 | /* cflag specifies lots of stuff: number of stop bits, parity, number | |
389 | of data bits, baud. What can the device actually handle?: | |
390 | CSTOPB (1 stop bit or 2) | |
391 | PARENB (parity) | |
392 | CSIZE (5bit .. 8bit) | |
393 | There is minimal hw support for parity (a PSW bit seems to hold the | |
394 | parity of whatever is in the accumulator). The UART either deals | |
395 | with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data, | |
396 | 1 special, stop). So, with firmware changes, we could do: | |
397 | 8N1: 10 bit | |
398 | 8N2: 11 bit, extra bit always (mark?) | |
399 | 8[EOMS]1: 11 bit, extra bit is parity | |
400 | 7[EOMS]1: 10 bit, b0/b7 is parity | |
401 | 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?) | |
402 | ||
403 | HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS | |
404 | bit. | |
405 | ||
406 | For now, just do baud. */ | |
407 | ||
95da310e | 408 | speed = tty_get_baud_rate(tty); |
e7806e36 AC |
409 | speed = keyspan_pda_setbaud(serial, speed); |
410 | ||
411 | if (speed == 0) { | |
412 | dbg("can't handle requested baud rate"); | |
413 | /* It hasn't changed so.. */ | |
414 | speed = tty_termios_baud_rate(old_termios); | |
1da177e4 | 415 | } |
e7806e36 AC |
416 | /* Only speed can change so copy the old h/w parameters |
417 | then encode the new speed */ | |
95da310e AC |
418 | tty_termios_copy_hw(tty->termios, old_termios); |
419 | tty_encode_baud_rate(tty, speed, speed); | |
1da177e4 LT |
420 | } |
421 | ||
422 | ||
423 | /* modem control pins: DTR and RTS are outputs and can be controlled. | |
424 | DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be | |
425 | read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */ | |
426 | ||
427 | static int keyspan_pda_get_modem_info(struct usb_serial *serial, | |
428 | unsigned char *value) | |
429 | { | |
430 | int rc; | |
ca65d256 JH |
431 | u8 *data; |
432 | ||
433 | data = kmalloc(1, GFP_KERNEL); | |
434 | if (!data) | |
435 | return -ENOMEM; | |
436 | ||
1da177e4 LT |
437 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
438 | 3, /* get pins */ | |
439 | USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN, | |
ca65d256 | 440 | 0, 0, data, 1, 2000); |
3b36a8fd | 441 | if (rc >= 0) |
ca65d256 JH |
442 | *value = *data; |
443 | ||
444 | kfree(data); | |
1da177e4 LT |
445 | return rc; |
446 | } | |
447 | ||
448 | ||
449 | static int keyspan_pda_set_modem_info(struct usb_serial *serial, | |
450 | unsigned char value) | |
451 | { | |
452 | int rc; | |
453 | rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
454 | 3, /* set pins */ | |
455 | USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT, | |
456 | value, 0, NULL, 0, 2000); | |
457 | return rc; | |
458 | } | |
459 | ||
95da310e | 460 | static int keyspan_pda_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 461 | { |
95da310e | 462 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
463 | struct usb_serial *serial = port->serial; |
464 | int rc; | |
465 | unsigned char status; | |
466 | int value; | |
467 | ||
468 | rc = keyspan_pda_get_modem_info(serial, &status); | |
469 | if (rc < 0) | |
470 | return rc; | |
471 | value = | |
472 | ((status & (1<<7)) ? TIOCM_DTR : 0) | | |
473 | ((status & (1<<6)) ? TIOCM_CAR : 0) | | |
474 | ((status & (1<<5)) ? TIOCM_RNG : 0) | | |
475 | ((status & (1<<4)) ? TIOCM_DSR : 0) | | |
476 | ((status & (1<<3)) ? TIOCM_CTS : 0) | | |
477 | ((status & (1<<2)) ? TIOCM_RTS : 0); | |
478 | return value; | |
479 | } | |
480 | ||
95da310e | 481 | static int keyspan_pda_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
482 | unsigned int set, unsigned int clear) |
483 | { | |
95da310e | 484 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
485 | struct usb_serial *serial = port->serial; |
486 | int rc; | |
487 | unsigned char status; | |
488 | ||
489 | rc = keyspan_pda_get_modem_info(serial, &status); | |
490 | if (rc < 0) | |
491 | return rc; | |
492 | ||
493 | if (set & TIOCM_RTS) | |
494 | status |= (1<<2); | |
495 | if (set & TIOCM_DTR) | |
496 | status |= (1<<7); | |
497 | ||
498 | if (clear & TIOCM_RTS) | |
499 | status &= ~(1<<2); | |
500 | if (clear & TIOCM_DTR) | |
501 | status &= ~(1<<7); | |
502 | rc = keyspan_pda_set_modem_info(serial, status); | |
503 | return rc; | |
504 | } | |
505 | ||
95da310e AC |
506 | static int keyspan_pda_write(struct tty_struct *tty, |
507 | struct usb_serial_port *port, const unsigned char *buf, int count) | |
1da177e4 LT |
508 | { |
509 | struct usb_serial *serial = port->serial; | |
510 | int request_unthrottle = 0; | |
511 | int rc = 0; | |
512 | struct keyspan_pda_private *priv; | |
513 | ||
514 | priv = usb_get_serial_port_data(port); | |
515 | /* guess how much room is left in the device's ring buffer, and if we | |
516 | want to send more than that, check first, updating our notion of | |
517 | what is left. If our write will result in no room left, ask the | |
518 | device to give us an interrupt when the room available rises above | |
519 | a threshold, and hold off all writers (eventually, those using | |
520 | select() or poll() too) until we receive that unthrottle interrupt. | |
521 | Block if we can't write anything at all, otherwise write as much as | |
522 | we can. */ | |
9e70f319 | 523 | dbg("keyspan_pda_write(%d)", count); |
1da177e4 LT |
524 | if (count == 0) { |
525 | dbg(" write request of 0 bytes"); | |
9e70f319 | 526 | return 0; |
1da177e4 LT |
527 | } |
528 | ||
529 | /* we might block because of: | |
530 | the TX urb is in-flight (wait until it completes) | |
531 | the device is full (wait until it says there is room) | |
532 | */ | |
e81ee637 | 533 | spin_lock_bh(&port->lock); |
507ca9bc | 534 | if (port->write_urb_busy || priv->tx_throttled) { |
e81ee637 | 535 | spin_unlock_bh(&port->lock); |
507ca9bc | 536 | return 0; |
1da177e4 | 537 | } |
507ca9bc | 538 | port->write_urb_busy = 1; |
e81ee637 | 539 | spin_unlock_bh(&port->lock); |
1da177e4 LT |
540 | |
541 | /* At this point the URB is in our control, nobody else can submit it | |
542 | again (the only sudden transition was the one from EINPROGRESS to | |
543 | finished). Also, the tx process is not throttled. So we are | |
544 | ready to write. */ | |
545 | ||
546 | count = (count > port->bulk_out_size) ? port->bulk_out_size : count; | |
547 | ||
548 | /* Check if we might overrun the Tx buffer. If so, ask the | |
549 | device how much room it really has. This is done only on | |
550 | scheduler time, since usb_control_msg() sleeps. */ | |
551 | if (count > priv->tx_room && !in_interrupt()) { | |
ca65d256 JH |
552 | u8 *room; |
553 | ||
554 | room = kmalloc(1, GFP_KERNEL); | |
555 | if (!room) { | |
556 | rc = -ENOMEM; | |
557 | goto exit; | |
558 | } | |
559 | ||
9e70f319 | 560 | rc = usb_control_msg(serial->dev, |
1da177e4 LT |
561 | usb_rcvctrlpipe(serial->dev, 0), |
562 | 6, /* write_room */ | |
563 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
564 | | USB_DIR_IN, | |
565 | 0, /* value: 0 means "remaining room" */ | |
566 | 0, /* index */ | |
ca65d256 | 567 | room, |
1da177e4 LT |
568 | 1, |
569 | 2000); | |
ca65d256 JH |
570 | if (rc > 0) { |
571 | dbg(" roomquery says %d", *room); | |
572 | priv->tx_room = *room; | |
573 | } | |
574 | kfree(room); | |
1da177e4 LT |
575 | if (rc < 0) { |
576 | dbg(" roomquery failed"); | |
577 | goto exit; | |
578 | } | |
579 | if (rc == 0) { | |
580 | dbg(" roomquery returned 0 bytes"); | |
581 | rc = -EIO; /* device didn't return any data */ | |
582 | goto exit; | |
583 | } | |
1da177e4 LT |
584 | } |
585 | if (count > priv->tx_room) { | |
586 | /* we're about to completely fill the Tx buffer, so | |
587 | we'll be throttled afterwards. */ | |
588 | count = priv->tx_room; | |
589 | request_unthrottle = 1; | |
590 | } | |
591 | ||
592 | if (count) { | |
593 | /* now transfer data */ | |
9e70f319 | 594 | memcpy(port->write_urb->transfer_buffer, buf, count); |
1da177e4 LT |
595 | /* send the data out the bulk port */ |
596 | port->write_urb->transfer_buffer_length = count; | |
507ca9bc | 597 | |
1da177e4 LT |
598 | priv->tx_room -= count; |
599 | ||
600 | port->write_urb->dev = port->serial->dev; | |
601 | rc = usb_submit_urb(port->write_urb, GFP_ATOMIC); | |
602 | if (rc) { | |
603 | dbg(" usb_submit_urb(write bulk) failed"); | |
604 | goto exit; | |
605 | } | |
9e70f319 | 606 | } else { |
1da177e4 LT |
607 | /* There wasn't any room left, so we are throttled until |
608 | the buffer empties a bit */ | |
609 | request_unthrottle = 1; | |
610 | } | |
611 | ||
612 | if (request_unthrottle) { | |
613 | priv->tx_throttled = 1; /* block writers */ | |
614 | schedule_work(&priv->unthrottle_work); | |
615 | } | |
616 | ||
617 | rc = count; | |
618 | exit: | |
507ca9bc GKH |
619 | if (rc < 0) |
620 | port->write_urb_busy = 0; | |
1da177e4 LT |
621 | return rc; |
622 | } | |
623 | ||
624 | ||
9e70f319 | 625 | static void keyspan_pda_write_bulk_callback(struct urb *urb) |
1da177e4 | 626 | { |
cdc97792 | 627 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
628 | struct keyspan_pda_private *priv; |
629 | ||
507ca9bc | 630 | port->write_urb_busy = 0; |
1da177e4 LT |
631 | priv = usb_get_serial_port_data(port); |
632 | ||
633 | /* queue up a wakeup at scheduler time */ | |
634 | schedule_work(&priv->wakeup_work); | |
635 | } | |
636 | ||
637 | ||
95da310e | 638 | static int keyspan_pda_write_room(struct tty_struct *tty) |
1da177e4 | 639 | { |
95da310e | 640 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 641 | struct keyspan_pda_private *priv; |
1da177e4 | 642 | priv = usb_get_serial_port_data(port); |
1da177e4 LT |
643 | /* used by n_tty.c for processing of tabs and such. Giving it our |
644 | conservative guess is probably good enough, but needs testing by | |
645 | running a console through the device. */ | |
9e70f319 | 646 | return priv->tx_room; |
1da177e4 LT |
647 | } |
648 | ||
649 | ||
95da310e | 650 | static int keyspan_pda_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 651 | { |
95da310e | 652 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 653 | struct keyspan_pda_private *priv; |
a5b6f60c AC |
654 | unsigned long flags; |
655 | int ret = 0; | |
507ca9bc | 656 | |
1da177e4 | 657 | priv = usb_get_serial_port_data(port); |
507ca9bc | 658 | |
1da177e4 LT |
659 | /* when throttled, return at least WAKEUP_CHARS to tell select() (via |
660 | n_tty.c:normal_poll() ) that we're not writeable. */ | |
a5b6f60c AC |
661 | |
662 | spin_lock_irqsave(&port->lock, flags); | |
507ca9bc | 663 | if (port->write_urb_busy || priv->tx_throttled) |
a5b6f60c AC |
664 | ret = 256; |
665 | spin_unlock_irqrestore(&port->lock, flags); | |
666 | return ret; | |
1da177e4 LT |
667 | } |
668 | ||
669 | ||
335f8514 AC |
670 | static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on) |
671 | { | |
672 | struct usb_serial *serial = port->serial; | |
673 | ||
674 | if (serial->dev) { | |
675 | if (on) | |
676 | keyspan_pda_set_modem_info(serial, (1<<7) | (1<< 2)); | |
677 | else | |
678 | keyspan_pda_set_modem_info(serial, 0); | |
679 | } | |
680 | } | |
681 | ||
682 | static int keyspan_pda_carrier_raised(struct usb_serial_port *port) | |
683 | { | |
684 | struct usb_serial *serial = port->serial; | |
685 | unsigned char modembits; | |
686 | ||
687 | /* If we can read the modem status and the DCD is low then | |
688 | carrier is not raised yet */ | |
689 | if (keyspan_pda_get_modem_info(serial, &modembits) >= 0) { | |
690 | if (!(modembits & (1>>6))) | |
691 | return 0; | |
692 | } | |
693 | /* Carrier raised, or we failed (eg disconnected) so | |
694 | progress accordingly */ | |
695 | return 1; | |
696 | } | |
697 | ||
698 | ||
95da310e | 699 | static int keyspan_pda_open(struct tty_struct *tty, |
a509a7e4 | 700 | struct usb_serial_port *port) |
1da177e4 LT |
701 | { |
702 | struct usb_serial *serial = port->serial; | |
ca65d256 | 703 | u8 *room; |
1da177e4 LT |
704 | int rc = 0; |
705 | struct keyspan_pda_private *priv; | |
706 | ||
707 | /* find out how much room is in the Tx ring */ | |
ca65d256 JH |
708 | room = kmalloc(1, GFP_KERNEL); |
709 | if (!room) | |
710 | return -ENOMEM; | |
711 | ||
1da177e4 LT |
712 | rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
713 | 6, /* write_room */ | |
714 | USB_TYPE_VENDOR | USB_RECIP_INTERFACE | |
715 | | USB_DIR_IN, | |
716 | 0, /* value */ | |
717 | 0, /* index */ | |
ca65d256 | 718 | room, |
1da177e4 LT |
719 | 1, |
720 | 2000); | |
721 | if (rc < 0) { | |
441b62c1 | 722 | dbg("%s - roomquery failed", __func__); |
1da177e4 LT |
723 | goto error; |
724 | } | |
725 | if (rc == 0) { | |
441b62c1 | 726 | dbg("%s - roomquery returned 0 bytes", __func__); |
1da177e4 LT |
727 | rc = -EIO; |
728 | goto error; | |
729 | } | |
730 | priv = usb_get_serial_port_data(port); | |
ca65d256 JH |
731 | priv->tx_room = *room; |
732 | priv->tx_throttled = *room ? 0 : 1; | |
1da177e4 | 733 | |
1da177e4 LT |
734 | /*Start reading from the device*/ |
735 | port->interrupt_in_urb->dev = serial->dev; | |
736 | rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
737 | if (rc) { | |
441b62c1 | 738 | dbg("%s - usb_submit_urb(read int) failed", __func__); |
1da177e4 LT |
739 | goto error; |
740 | } | |
1da177e4 | 741 | error: |
ca65d256 | 742 | kfree(room); |
1da177e4 LT |
743 | return rc; |
744 | } | |
335f8514 | 745 | static void keyspan_pda_close(struct usb_serial_port *port) |
1da177e4 LT |
746 | { |
747 | struct usb_serial *serial = port->serial; | |
748 | ||
749 | if (serial->dev) { | |
1da177e4 LT |
750 | /* shutdown our bulk reads and writes */ |
751 | usb_kill_urb(port->write_urb); | |
752 | usb_kill_urb(port->interrupt_in_urb); | |
753 | } | |
754 | } | |
755 | ||
756 | ||
757 | /* download the firmware to a "fake" device (pre-renumeration) */ | |
9e70f319 | 758 | static int keyspan_pda_fake_startup(struct usb_serial *serial) |
1da177e4 LT |
759 | { |
760 | int response; | |
3edbf98b DW |
761 | const char *fw_name; |
762 | const struct ihex_binrec *record; | |
763 | const struct firmware *fw; | |
1da177e4 LT |
764 | |
765 | /* download the firmware here ... */ | |
766 | response = ezusb_set_reset(serial, 1); | |
767 | ||
3edbf98b | 768 | if (0) { ; } |
1da177e4 | 769 | #ifdef KEYSPAN |
3edbf98b DW |
770 | else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID) |
771 | fw_name = "keyspan_pda/keyspan_pda.fw"; | |
1da177e4 LT |
772 | #endif |
773 | #ifdef XIRCOM | |
3edbf98b DW |
774 | else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) || |
775 | (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID)) | |
776 | fw_name = "keyspan_pda/xircom_pgs.fw"; | |
1da177e4 | 777 | #endif |
3edbf98b | 778 | else { |
194343d9 GKH |
779 | dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n", |
780 | __func__); | |
1da177e4 LT |
781 | return -ENODEV; |
782 | } | |
3edbf98b | 783 | if (request_ihex_firmware(&fw, fw_name, &serial->dev->dev)) { |
194343d9 GKH |
784 | dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n", |
785 | fw_name); | |
3edbf98b DW |
786 | return -ENOENT; |
787 | } | |
788 | record = (const struct ihex_binrec *)fw->data; | |
1da177e4 | 789 | |
3edbf98b DW |
790 | while (record) { |
791 | response = ezusb_writememory(serial, be32_to_cpu(record->addr), | |
1da177e4 | 792 | (unsigned char *)record->data, |
3edbf98b | 793 | be16_to_cpu(record->len), 0xa0); |
1da177e4 | 794 | if (response < 0) { |
194343d9 GKH |
795 | dev_err(&serial->dev->dev, "ezusb_writememory failed " |
796 | "for Keyspan PDA firmware (%d %04X %p %d)\n", | |
797 | response, be32_to_cpu(record->addr), | |
798 | record->data, be16_to_cpu(record->len)); | |
1da177e4 LT |
799 | break; |
800 | } | |
3edbf98b | 801 | record = ihex_next_binrec(record); |
1da177e4 | 802 | } |
3edbf98b | 803 | release_firmware(fw); |
1da177e4 LT |
804 | /* bring device out of reset. Renumeration will occur in a moment |
805 | and the new device will bind to the real driver */ | |
806 | response = ezusb_set_reset(serial, 0); | |
807 | ||
808 | /* we want this device to fail to have a driver assigned to it. */ | |
9e70f319 | 809 | return 1; |
1da177e4 LT |
810 | } |
811 | ||
e6c4ef98 BH |
812 | #ifdef KEYSPAN |
813 | MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw"); | |
814 | #endif | |
815 | #ifdef XIRCOM | |
816 | MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw"); | |
817 | #endif | |
818 | ||
9e70f319 | 819 | static int keyspan_pda_startup(struct usb_serial *serial) |
1da177e4 LT |
820 | { |
821 | ||
822 | struct keyspan_pda_private *priv; | |
823 | ||
824 | /* allocate the private data structures for all ports. Well, for all | |
825 | one ports. */ | |
826 | ||
827 | priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL); | |
828 | if (!priv) | |
9e70f319 | 829 | return 1; /* error */ |
1da177e4 LT |
830 | usb_set_serial_port_data(serial->port[0], priv); |
831 | init_waitqueue_head(&serial->port[0]->write_wait); | |
c4028958 DH |
832 | INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write); |
833 | INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle); | |
834 | priv->serial = serial; | |
835 | priv->port = serial->port[0]; | |
9e70f319 | 836 | return 0; |
1da177e4 LT |
837 | } |
838 | ||
f9c99bb8 | 839 | static void keyspan_pda_release(struct usb_serial *serial) |
1da177e4 | 840 | { |
441b62c1 | 841 | dbg("%s", __func__); |
9e70f319 | 842 | |
1da177e4 LT |
843 | kfree(usb_get_serial_port_data(serial->port[0])); |
844 | } | |
845 | ||
846 | #ifdef KEYSPAN | |
ea65370d | 847 | static struct usb_serial_driver keyspan_pda_fake_device = { |
18fcac35 GKH |
848 | .driver = { |
849 | .owner = THIS_MODULE, | |
269bda1c | 850 | .name = "keyspan_pda_pre", |
18fcac35 | 851 | }, |
269bda1c | 852 | .description = "Keyspan PDA - (prerenumeration)", |
d9b1b787 | 853 | .usb_driver = &keyspan_pda_driver, |
1da177e4 | 854 | .id_table = id_table_fake, |
1da177e4 LT |
855 | .num_ports = 1, |
856 | .attach = keyspan_pda_fake_startup, | |
857 | }; | |
858 | #endif | |
859 | ||
860 | #ifdef XIRCOM | |
ea65370d | 861 | static struct usb_serial_driver xircom_pgs_fake_device = { |
18fcac35 GKH |
862 | .driver = { |
863 | .owner = THIS_MODULE, | |
269bda1c | 864 | .name = "xircom_no_firm", |
18fcac35 | 865 | }, |
269bda1c | 866 | .description = "Xircom / Entregra PGS - (prerenumeration)", |
d9b1b787 | 867 | .usb_driver = &keyspan_pda_driver, |
1da177e4 | 868 | .id_table = id_table_fake_xircom, |
1da177e4 LT |
869 | .num_ports = 1, |
870 | .attach = keyspan_pda_fake_startup, | |
871 | }; | |
872 | #endif | |
873 | ||
ea65370d | 874 | static struct usb_serial_driver keyspan_pda_device = { |
18fcac35 GKH |
875 | .driver = { |
876 | .owner = THIS_MODULE, | |
269bda1c | 877 | .name = "keyspan_pda", |
18fcac35 | 878 | }, |
269bda1c | 879 | .description = "Keyspan PDA", |
d9b1b787 | 880 | .usb_driver = &keyspan_pda_driver, |
1da177e4 | 881 | .id_table = id_table_std, |
1da177e4 | 882 | .num_ports = 1, |
335f8514 AC |
883 | .dtr_rts = keyspan_pda_dtr_rts, |
884 | .carrier_raised = keyspan_pda_carrier_raised, | |
1da177e4 LT |
885 | .open = keyspan_pda_open, |
886 | .close = keyspan_pda_close, | |
887 | .write = keyspan_pda_write, | |
888 | .write_room = keyspan_pda_write_room, | |
889 | .write_bulk_callback = keyspan_pda_write_bulk_callback, | |
890 | .read_int_callback = keyspan_pda_rx_interrupt, | |
891 | .chars_in_buffer = keyspan_pda_chars_in_buffer, | |
892 | .throttle = keyspan_pda_rx_throttle, | |
893 | .unthrottle = keyspan_pda_rx_unthrottle, | |
1da177e4 LT |
894 | .set_termios = keyspan_pda_set_termios, |
895 | .break_ctl = keyspan_pda_break_ctl, | |
896 | .tiocmget = keyspan_pda_tiocmget, | |
897 | .tiocmset = keyspan_pda_tiocmset, | |
898 | .attach = keyspan_pda_startup, | |
f9c99bb8 | 899 | .release = keyspan_pda_release, |
1da177e4 LT |
900 | }; |
901 | ||
902 | ||
9e70f319 | 903 | static int __init keyspan_pda_init(void) |
1da177e4 LT |
904 | { |
905 | int retval; | |
906 | retval = usb_serial_register(&keyspan_pda_device); | |
907 | if (retval) | |
908 | goto failed_pda_register; | |
909 | #ifdef KEYSPAN | |
910 | retval = usb_serial_register(&keyspan_pda_fake_device); | |
911 | if (retval) | |
912 | goto failed_pda_fake_register; | |
913 | #endif | |
914 | #ifdef XIRCOM | |
915 | retval = usb_serial_register(&xircom_pgs_fake_device); | |
916 | if (retval) | |
917 | goto failed_xircom_register; | |
918 | #endif | |
919 | retval = usb_register(&keyspan_pda_driver); | |
920 | if (retval) | |
921 | goto failed_usb_register; | |
c197a8db GKH |
922 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
923 | DRIVER_DESC "\n"); | |
1da177e4 | 924 | return 0; |
9e70f319 | 925 | failed_usb_register: |
1da177e4 LT |
926 | #ifdef XIRCOM |
927 | usb_serial_deregister(&xircom_pgs_fake_device); | |
928 | failed_xircom_register: | |
929 | #endif /* XIRCOM */ | |
930 | #ifdef KEYSPAN | |
931 | usb_serial_deregister(&keyspan_pda_fake_device); | |
932 | #endif | |
933 | #ifdef KEYSPAN | |
934 | failed_pda_fake_register: | |
935 | #endif | |
936 | usb_serial_deregister(&keyspan_pda_device); | |
937 | failed_pda_register: | |
938 | return retval; | |
939 | } | |
940 | ||
941 | ||
9e70f319 | 942 | static void __exit keyspan_pda_exit(void) |
1da177e4 | 943 | { |
9e70f319 AC |
944 | usb_deregister(&keyspan_pda_driver); |
945 | usb_serial_deregister(&keyspan_pda_device); | |
1da177e4 | 946 | #ifdef KEYSPAN |
9e70f319 | 947 | usb_serial_deregister(&keyspan_pda_fake_device); |
1da177e4 LT |
948 | #endif |
949 | #ifdef XIRCOM | |
9e70f319 | 950 | usb_serial_deregister(&xircom_pgs_fake_device); |
1da177e4 LT |
951 | #endif |
952 | } | |
953 | ||
954 | ||
955 | module_init(keyspan_pda_init); | |
956 | module_exit(keyspan_pda_exit); | |
957 | ||
9e70f319 AC |
958 | MODULE_AUTHOR(DRIVER_AUTHOR); |
959 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
960 | MODULE_LICENSE("GPL"); |
961 | ||
962 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
963 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
964 |