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1da177e4 LT |
1 | /* |
2 | * USB Cypress M8 driver | |
3 | * | |
4 | * Copyright (C) 2004 | |
5 | * Lonnie Mendez (dignome@gmail.com) | |
6 | * Copyright (C) 2003,2004 | |
7 | * Neil Whelchel (koyama@firstlight.net) | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * See Documentation/usb/usb-serial.txt for more information on using this driver | |
15 | * | |
16 | * See http://geocities.com/i0xox0i for information on this driver and the | |
17 | * earthmate usb device. | |
18 | * | |
19 | * | |
20 | * Lonnie Mendez <dignome@gmail.com> | |
21 | * 12-15-2004 | |
22 | * Incorporated write buffering from pl2303 driver. Fixed bug with line | |
23 | * handling so both lines are raised in cypress_open. (was dropping rts) | |
24 | * Various code cleanups made as well along with other misc bug fixes. | |
25 | * | |
26 | * Lonnie Mendez <dignome@gmail.com> | |
27 | * 04-10-2004 | |
28 | * Driver modified to support dynamic line settings. Various improvments | |
29 | * and features. | |
30 | * | |
31 | * Neil Whelchel | |
32 | * 10-2003 | |
33 | * Driver first released. | |
34 | * | |
35 | * | |
36 | * Long Term TODO: | |
37 | * Improve transfer speeds - both read/write are somewhat slow | |
38 | * at this point. | |
39 | * Improve debugging. Show modem line status with debug output and | |
40 | * implement filtering for certain data as a module parameter. | |
41 | */ | |
42 | ||
43 | /* Thanks to Neil Whelchel for writing the first cypress m8 implementation for linux. */ | |
44 | /* Thanks to cypress for providing references for the hid reports. */ | |
45 | /* Thanks to Jiang Zhang for providing links and for general help. */ | |
46 | /* Code originates and was built up from ftdi_sio, belkin, pl2303 and others. */ | |
47 | ||
48 | ||
49 | #include <linux/config.h> | |
50 | #include <linux/kernel.h> | |
51 | #include <linux/errno.h> | |
52 | #include <linux/init.h> | |
53 | #include <linux/slab.h> | |
54 | #include <linux/tty.h> | |
55 | #include <linux/tty_driver.h> | |
56 | #include <linux/tty_flip.h> | |
57 | #include <linux/module.h> | |
58 | #include <linux/moduleparam.h> | |
59 | #include <linux/spinlock.h> | |
60 | #include <linux/usb.h> | |
61 | #include <linux/serial.h> | |
62 | #include <linux/delay.h> | |
63 | #include <asm/uaccess.h> | |
64 | ||
65 | #include "usb-serial.h" | |
66 | #include "cypress_m8.h" | |
67 | ||
68 | ||
69 | #ifdef CONFIG_USB_SERIAL_DEBUG | |
70 | static int debug = 1; | |
71 | #else | |
72 | static int debug; | |
73 | #endif | |
74 | static int stats; | |
75 | ||
76 | /* | |
77 | * Version Information | |
78 | */ | |
79 | #define DRIVER_VERSION "v1.08" | |
80 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" | |
81 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
82 | ||
83 | /* write buffer size defines */ | |
84 | #define CYPRESS_BUF_SIZE 1024 | |
85 | #define CYPRESS_CLOSING_WAIT (30*HZ) | |
86 | ||
87 | static struct usb_device_id id_table_earthmate [] = { | |
88 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
89 | { } /* Terminating entry */ | |
90 | }; | |
91 | ||
92 | static struct usb_device_id id_table_cyphidcomrs232 [] = { | |
93 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, | |
94 | { } /* Terminating entry */ | |
95 | }; | |
96 | ||
97 | static struct usb_device_id id_table_combined [] = { | |
98 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
99 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, | |
100 | { } /* Terminating entry */ | |
101 | }; | |
102 | ||
103 | MODULE_DEVICE_TABLE (usb, id_table_combined); | |
104 | ||
105 | static struct usb_driver cypress_driver = { | |
106 | .name = "cypress", | |
107 | .probe = usb_serial_probe, | |
108 | .disconnect = usb_serial_disconnect, | |
109 | .id_table = id_table_combined, | |
110 | }; | |
111 | ||
112 | struct cypress_private { | |
113 | spinlock_t lock; /* private lock */ | |
114 | int chiptype; /* identifier of device, for quirks/etc */ | |
115 | int bytes_in; /* used for statistics */ | |
116 | int bytes_out; /* used for statistics */ | |
117 | int cmd_count; /* used for statistics */ | |
118 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
119 | struct cypress_buf *buf; /* write buffer */ | |
120 | int write_urb_in_use; /* write urb in use indicator */ | |
121 | int termios_initialized; | |
122 | __u8 line_control; /* holds dtr / rts value */ | |
123 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
124 | __u8 current_config; /* stores the current configuration byte */ | |
125 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
126 | int baud_rate; /* stores current baud rate in integer form */ | |
127 | int cbr_mask; /* stores current baud rate in masked form */ | |
128 | int isthrottled; /* if throttled, discard reads */ | |
129 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
130 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
131 | /* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */ | |
132 | struct termios tmp_termios; /* stores the old termios settings */ | |
133 | char calledfromopen; /* used when issuing lines on open - fixes rts drop bug */ | |
134 | }; | |
135 | ||
136 | /* write buffer structure */ | |
137 | struct cypress_buf { | |
138 | unsigned int buf_size; | |
139 | char *buf_buf; | |
140 | char *buf_get; | |
141 | char *buf_put; | |
142 | }; | |
143 | ||
144 | /* function prototypes for the Cypress USB to serial device */ | |
145 | static int cypress_earthmate_startup (struct usb_serial *serial); | |
146 | static int cypress_hidcom_startup (struct usb_serial *serial); | |
147 | static void cypress_shutdown (struct usb_serial *serial); | |
148 | static int cypress_open (struct usb_serial_port *port, struct file *filp); | |
149 | static void cypress_close (struct usb_serial_port *port, struct file *filp); | |
150 | static int cypress_write (struct usb_serial_port *port, const unsigned char *buf, int count); | |
151 | static void cypress_send (struct usb_serial_port *port); | |
152 | static int cypress_write_room (struct usb_serial_port *port); | |
153 | static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); | |
154 | static void cypress_set_termios (struct usb_serial_port *port, struct termios * old); | |
155 | static int cypress_tiocmget (struct usb_serial_port *port, struct file *file); | |
156 | static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); | |
157 | static int cypress_chars_in_buffer (struct usb_serial_port *port); | |
158 | static void cypress_throttle (struct usb_serial_port *port); | |
159 | static void cypress_unthrottle (struct usb_serial_port *port); | |
160 | static void cypress_read_int_callback (struct urb *urb, struct pt_regs *regs); | |
161 | static void cypress_write_int_callback (struct urb *urb, struct pt_regs *regs); | |
162 | /* baud helper functions */ | |
163 | static int mask_to_rate (unsigned mask); | |
164 | static unsigned rate_to_mask (int rate); | |
165 | /* write buffer functions */ | |
166 | static struct cypress_buf *cypress_buf_alloc(unsigned int size); | |
167 | static void cypress_buf_free(struct cypress_buf *cb); | |
168 | static void cypress_buf_clear(struct cypress_buf *cb); | |
169 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb); | |
170 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb); | |
171 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, | |
172 | unsigned int count); | |
173 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, | |
174 | unsigned int count); | |
175 | ||
176 | ||
177 | static struct usb_serial_device_type cypress_earthmate_device = { | |
178 | .owner = THIS_MODULE, | |
179 | .name = "DeLorme Earthmate USB", | |
180 | .short_name = "earthmate", | |
181 | .id_table = id_table_earthmate, | |
182 | .num_interrupt_in = 1, | |
183 | .num_interrupt_out = 1, | |
184 | .num_bulk_in = NUM_DONT_CARE, | |
185 | .num_bulk_out = NUM_DONT_CARE, | |
186 | .num_ports = 1, | |
187 | .attach = cypress_earthmate_startup, | |
188 | .shutdown = cypress_shutdown, | |
189 | .open = cypress_open, | |
190 | .close = cypress_close, | |
191 | .write = cypress_write, | |
192 | .write_room = cypress_write_room, | |
193 | .ioctl = cypress_ioctl, | |
194 | .set_termios = cypress_set_termios, | |
195 | .tiocmget = cypress_tiocmget, | |
196 | .tiocmset = cypress_tiocmset, | |
197 | .chars_in_buffer = cypress_chars_in_buffer, | |
198 | .throttle = cypress_throttle, | |
199 | .unthrottle = cypress_unthrottle, | |
200 | .read_int_callback = cypress_read_int_callback, | |
201 | .write_int_callback = cypress_write_int_callback, | |
202 | }; | |
203 | ||
204 | static struct usb_serial_device_type cypress_hidcom_device = { | |
205 | .owner = THIS_MODULE, | |
206 | .name = "HID->COM RS232 Adapter", | |
207 | .short_name = "cyphidcom", | |
208 | .id_table = id_table_cyphidcomrs232, | |
209 | .num_interrupt_in = 1, | |
210 | .num_interrupt_out = 1, | |
211 | .num_bulk_in = NUM_DONT_CARE, | |
212 | .num_bulk_out = NUM_DONT_CARE, | |
213 | .num_ports = 1, | |
214 | .attach = cypress_hidcom_startup, | |
215 | .shutdown = cypress_shutdown, | |
216 | .open = cypress_open, | |
217 | .close = cypress_close, | |
218 | .write = cypress_write, | |
219 | .write_room = cypress_write_room, | |
220 | .ioctl = cypress_ioctl, | |
221 | .set_termios = cypress_set_termios, | |
222 | .tiocmget = cypress_tiocmget, | |
223 | .tiocmset = cypress_tiocmset, | |
224 | .chars_in_buffer = cypress_chars_in_buffer, | |
225 | .throttle = cypress_throttle, | |
226 | .unthrottle = cypress_unthrottle, | |
227 | .read_int_callback = cypress_read_int_callback, | |
228 | .write_int_callback = cypress_write_int_callback, | |
229 | }; | |
230 | ||
231 | ||
232 | /***************************************************************************** | |
233 | * Cypress serial helper functions | |
234 | *****************************************************************************/ | |
235 | ||
236 | ||
237 | /* This function can either set or retreive the current serial line settings */ | |
238 | static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_mask, int data_bits, int stop_bits, | |
239 | int parity_enable, int parity_type, int reset, int cypress_request_type) | |
240 | { | |
241 | int i, n_baud_rate = 0, retval = 0; | |
242 | struct cypress_private *priv; | |
243 | __u8 feature_buffer[5]; | |
244 | __u8 config; | |
245 | unsigned long flags; | |
246 | ||
247 | dbg("%s", __FUNCTION__); | |
248 | ||
249 | priv = usb_get_serial_port_data(port); | |
250 | ||
251 | switch(cypress_request_type) { | |
252 | case CYPRESS_SET_CONFIG: | |
253 | ||
254 | /* | |
255 | * The general purpose firmware for the Cypress M8 allows for a maximum speed | |
256 | * of 57600bps (I have no idea whether DeLorme chose to use the general purpose | |
257 | * firmware or not), if you need to modify this speed setting for your own | |
258 | * project please add your own chiptype and modify the code likewise. The | |
259 | * Cypress HID->COM device will work successfully up to 115200bps. | |
260 | */ | |
261 | if (baud_mask != priv->cbr_mask) { | |
262 | dbg("%s - baud rate is changing", __FUNCTION__); | |
263 | if ( priv->chiptype == CT_EARTHMATE ) { | |
264 | /* 300 and 600 baud rates are supported under the generic firmware, | |
265 | * but are not used with NMEA and SiRF protocols */ | |
266 | ||
267 | if ( (baud_mask == B300) || (baud_mask == B600) ) { | |
268 | err("%s - failed setting baud rate, unsupported speed (default to 4800)", | |
269 | __FUNCTION__); | |
270 | n_baud_rate = 4800; | |
271 | } else if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) { | |
272 | err("%s - failed setting baud rate, unsupported speed (default to 4800)", | |
273 | __FUNCTION__); | |
274 | n_baud_rate = 4800; | |
275 | } | |
276 | } else if (priv->chiptype == CT_CYPHIDCOM) { | |
277 | if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) { | |
278 | err("%s - failed setting baud rate, unsupported speed (default to 4800)", | |
279 | __FUNCTION__); | |
280 | n_baud_rate = 4800; | |
281 | } | |
282 | } else if (priv->chiptype == CT_GENERIC) { | |
283 | if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) { | |
284 | err("%s - failed setting baud rate, unsupported speed (default to 4800)", | |
285 | __FUNCTION__); | |
286 | n_baud_rate = 4800; | |
287 | } | |
288 | } else { | |
289 | info("%s - please define your chiptype, using 4800bps default", __FUNCTION__); | |
290 | n_baud_rate = 4800; | |
291 | } | |
292 | } else { /* baud rate not changing, keep the old */ | |
293 | n_baud_rate = priv->baud_rate; | |
294 | } | |
295 | dbg("%s - baud rate is being sent as %d", __FUNCTION__, n_baud_rate); | |
296 | ||
297 | ||
298 | /* | |
299 | * This algorithm accredited to Jiang Jay Zhang... thanks for all the help! | |
300 | */ | |
301 | for (i = 0; i < 4; ++i) { | |
302 | feature_buffer[i] = ( n_baud_rate >> (i*8) & 0xFF ); | |
303 | } | |
304 | ||
305 | config = 0; // reset config byte | |
306 | config |= data_bits; // assign data bits in 2 bit space ( max 3 ) | |
307 | /* 1 bit gap */ | |
308 | config |= (stop_bits << 3); // assign stop bits in 1 bit space | |
309 | config |= (parity_enable << 4); // assign parity flag in 1 bit space | |
310 | config |= (parity_type << 5); // assign parity type in 1 bit space | |
311 | /* 1 bit gap */ | |
312 | config |= (reset << 7); // assign reset at end of byte, 1 bit space | |
313 | ||
314 | feature_buffer[4] = config; | |
315 | ||
316 | dbg("%s - device is being sent this feature report:", __FUNCTION__); | |
317 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __FUNCTION__, feature_buffer[0], feature_buffer[1], | |
318 | feature_buffer[2], feature_buffer[3], feature_buffer[4]); | |
319 | ||
320 | retval = usb_control_msg (port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), | |
321 | HID_REQ_SET_REPORT, USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
322 | 0x0300, 0, feature_buffer, 5, 500); | |
323 | ||
324 | if (retval != 5) | |
325 | err("%s - failed sending serial line settings - %d", __FUNCTION__, retval); | |
326 | else { | |
327 | spin_lock_irqsave(&priv->lock, flags); | |
328 | priv->baud_rate = n_baud_rate; | |
329 | priv->cbr_mask = baud_mask; | |
330 | priv->current_config = config; | |
331 | ++priv->cmd_count; | |
332 | spin_unlock_irqrestore(&priv->lock, flags); | |
333 | } | |
334 | break; | |
335 | case CYPRESS_GET_CONFIG: | |
336 | dbg("%s - retreiving serial line settings", __FUNCTION__); | |
337 | /* reset values in feature buffer */ | |
338 | memset(feature_buffer, 0, 5); | |
339 | ||
340 | retval = usb_control_msg (port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), | |
341 | HID_REQ_GET_REPORT, USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
342 | 0x0300, 0, feature_buffer, 5, 500); | |
343 | if (retval != 5) { | |
344 | err("%s - failed to retreive serial line settings - %d", __FUNCTION__, retval); | |
345 | return retval; | |
346 | } else { | |
347 | spin_lock_irqsave(&priv->lock, flags); | |
348 | /* store the config in one byte, and later use bit masks to check values */ | |
349 | priv->current_config = feature_buffer[4]; | |
350 | /* reverse the process above to get the baud_mask value */ | |
351 | n_baud_rate = 0; // reset bits | |
352 | for (i = 0; i < 4; ++i) { | |
353 | n_baud_rate |= ( feature_buffer[i] << (i*8) ); | |
354 | } | |
355 | ||
356 | priv->baud_rate = n_baud_rate; | |
357 | if ( (priv->cbr_mask = rate_to_mask(n_baud_rate)) == 0x40) | |
358 | dbg("%s - failed setting the baud mask (not defined)", __FUNCTION__); | |
359 | ++priv->cmd_count; | |
360 | spin_unlock_irqrestore(&priv->lock, flags); | |
361 | } | |
362 | break; | |
363 | default: | |
364 | err("%s - unsupported serial control command issued", __FUNCTION__); | |
365 | } | |
366 | return retval; | |
367 | } /* cypress_serial_control */ | |
368 | ||
369 | ||
370 | /* given a baud mask, it will return speed on success */ | |
371 | static int mask_to_rate (unsigned mask) | |
372 | { | |
373 | int rate; | |
374 | ||
375 | switch (mask) { | |
376 | case B0: rate = 0; break; | |
377 | case B300: rate = 300; break; | |
378 | case B600: rate = 600; break; | |
379 | case B1200: rate = 1200; break; | |
380 | case B2400: rate = 2400; break; | |
381 | case B4800: rate = 4800; break; | |
382 | case B9600: rate = 9600; break; | |
383 | case B19200: rate = 19200; break; | |
384 | case B38400: rate = 38400; break; | |
385 | case B57600: rate = 57600; break; | |
386 | case B115200: rate = 115200; break; | |
387 | default: rate = -1; | |
388 | } | |
389 | ||
390 | return rate; | |
391 | } | |
392 | ||
393 | ||
394 | static unsigned rate_to_mask (int rate) | |
395 | { | |
396 | unsigned mask; | |
397 | ||
398 | switch (rate) { | |
399 | case 0: mask = B0; break; | |
400 | case 300: mask = B300; break; | |
401 | case 600: mask = B600; break; | |
402 | case 1200: mask = B1200; break; | |
403 | case 2400: mask = B2400; break; | |
404 | case 4800: mask = B4800; break; | |
405 | case 9600: mask = B9600; break; | |
406 | case 19200: mask = B19200; break; | |
407 | case 38400: mask = B38400; break; | |
408 | case 57600: mask = B57600; break; | |
409 | case 115200: mask = B115200; break; | |
410 | default: mask = 0x40; | |
411 | } | |
412 | ||
413 | return mask; | |
414 | } | |
415 | /***************************************************************************** | |
416 | * Cypress serial driver functions | |
417 | *****************************************************************************/ | |
418 | ||
419 | ||
420 | static int generic_startup (struct usb_serial *serial) | |
421 | { | |
422 | struct cypress_private *priv; | |
423 | ||
424 | dbg("%s - port %d", __FUNCTION__, serial->port[0]->number); | |
425 | ||
426 | priv = kmalloc(sizeof (struct cypress_private), GFP_KERNEL); | |
427 | if (!priv) | |
428 | return -ENOMEM; | |
429 | ||
430 | memset(priv, 0x00, sizeof (struct cypress_private)); | |
431 | spin_lock_init(&priv->lock); | |
432 | priv->buf = cypress_buf_alloc(CYPRESS_BUF_SIZE); | |
433 | if (priv->buf == NULL) { | |
434 | kfree(priv); | |
435 | return -ENOMEM; | |
436 | } | |
437 | init_waitqueue_head(&priv->delta_msr_wait); | |
438 | ||
439 | usb_reset_configuration (serial->dev); | |
440 | ||
441 | priv->cmd_ctrl = 0; | |
442 | priv->line_control = 0; | |
443 | priv->termios_initialized = 0; | |
444 | priv->calledfromopen = 0; | |
445 | priv->rx_flags = 0; | |
446 | usb_set_serial_port_data(serial->port[0], priv); | |
447 | ||
448 | return (0); | |
449 | } | |
450 | ||
451 | ||
452 | static int cypress_earthmate_startup (struct usb_serial *serial) | |
453 | { | |
454 | struct cypress_private *priv; | |
455 | ||
456 | dbg("%s", __FUNCTION__); | |
457 | ||
458 | if (generic_startup(serial)) { | |
459 | dbg("%s - Failed setting up port %d", __FUNCTION__, serial->port[0]->number); | |
460 | return 1; | |
461 | } | |
462 | ||
463 | priv = usb_get_serial_port_data(serial->port[0]); | |
464 | priv->chiptype = CT_EARTHMATE; | |
465 | ||
466 | return (0); | |
467 | } /* cypress_earthmate_startup */ | |
468 | ||
469 | ||
470 | static int cypress_hidcom_startup (struct usb_serial *serial) | |
471 | { | |
472 | struct cypress_private *priv; | |
473 | ||
474 | dbg("%s", __FUNCTION__); | |
475 | ||
476 | if (generic_startup(serial)) { | |
477 | dbg("%s - Failed setting up port %d", __FUNCTION__, serial->port[0]->number); | |
478 | return 1; | |
479 | } | |
480 | ||
481 | priv = usb_get_serial_port_data(serial->port[0]); | |
482 | priv->chiptype = CT_CYPHIDCOM; | |
483 | ||
484 | return (0); | |
485 | } /* cypress_hidcom_startup */ | |
486 | ||
487 | ||
488 | static void cypress_shutdown (struct usb_serial *serial) | |
489 | { | |
490 | struct cypress_private *priv; | |
491 | ||
492 | dbg ("%s - port %d", __FUNCTION__, serial->port[0]->number); | |
493 | ||
494 | /* all open ports are closed at this point */ | |
495 | ||
496 | priv = usb_get_serial_port_data(serial->port[0]); | |
497 | ||
498 | if (priv) { | |
499 | cypress_buf_free(priv->buf); | |
500 | kfree(priv); | |
501 | usb_set_serial_port_data(serial->port[0], NULL); | |
502 | } | |
503 | } | |
504 | ||
505 | ||
506 | static int cypress_open (struct usb_serial_port *port, struct file *filp) | |
507 | { | |
508 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
509 | struct usb_serial *serial = port->serial; | |
510 | unsigned long flags; | |
511 | int result = 0; | |
512 | ||
513 | dbg("%s - port %d", __FUNCTION__, port->number); | |
514 | ||
515 | /* clear halts before open */ | |
516 | usb_clear_halt(serial->dev, 0x00); | |
517 | usb_clear_halt(serial->dev, 0x81); | |
518 | usb_clear_halt(serial->dev, 0x02); | |
519 | ||
520 | spin_lock_irqsave(&priv->lock, flags); | |
521 | /* reset read/write statistics */ | |
522 | priv->bytes_in = 0; | |
523 | priv->bytes_out = 0; | |
524 | priv->cmd_count = 0; | |
525 | priv->rx_flags = 0; | |
526 | spin_unlock_irqrestore(&priv->lock, flags); | |
527 | ||
528 | /* setting to zero could cause data loss */ | |
529 | port->tty->low_latency = 1; | |
530 | ||
531 | /* raise both lines and set termios */ | |
532 | spin_lock_irqsave(&priv->lock, flags); | |
533 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
534 | priv->calledfromopen = 1; | |
535 | priv->cmd_ctrl = 1; | |
536 | spin_unlock_irqrestore(&priv->lock, flags); | |
537 | result = cypress_write(port, NULL, 0); | |
538 | ||
539 | if (result) { | |
540 | dev_err(&port->dev, "%s - failed setting the control lines - error %d\n", __FUNCTION__, result); | |
541 | return result; | |
542 | } else | |
543 | dbg("%s - success setting the control lines", __FUNCTION__); | |
544 | ||
545 | cypress_set_termios(port, &priv->tmp_termios); | |
546 | ||
547 | /* setup the port and start reading from the device */ | |
548 | if(!port->interrupt_in_urb){ | |
549 | err("%s - interrupt_in_urb is empty!", __FUNCTION__); | |
550 | return(-1); | |
551 | } | |
552 | ||
553 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
554 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
555 | port->interrupt_in_urb->transfer_buffer, port->interrupt_in_urb->transfer_buffer_length, | |
556 | cypress_read_int_callback, port, port->interrupt_in_urb->interval); | |
557 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
558 | ||
559 | if (result){ | |
560 | dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); | |
561 | } | |
562 | ||
563 | return result; | |
564 | } /* cypress_open */ | |
565 | ||
566 | ||
567 | static void cypress_close(struct usb_serial_port *port, struct file * filp) | |
568 | { | |
569 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
570 | unsigned int c_cflag; | |
571 | unsigned long flags; | |
572 | int bps; | |
573 | long timeout; | |
574 | wait_queue_t wait; | |
575 | ||
576 | dbg("%s - port %d", __FUNCTION__, port->number); | |
577 | ||
578 | /* wait for data to drain from buffer */ | |
579 | spin_lock_irqsave(&priv->lock, flags); | |
580 | timeout = CYPRESS_CLOSING_WAIT; | |
581 | init_waitqueue_entry(&wait, current); | |
582 | add_wait_queue(&port->tty->write_wait, &wait); | |
583 | for (;;) { | |
584 | set_current_state(TASK_INTERRUPTIBLE); | |
585 | if (cypress_buf_data_avail(priv->buf) == 0 | |
586 | || timeout == 0 || signal_pending(current) | |
587 | || !usb_get_intfdata(port->serial->interface)) | |
588 | break; | |
589 | spin_unlock_irqrestore(&priv->lock, flags); | |
590 | timeout = schedule_timeout(timeout); | |
591 | spin_lock_irqsave(&priv->lock, flags); | |
592 | } | |
593 | set_current_state(TASK_RUNNING); | |
594 | remove_wait_queue(&port->tty->write_wait, &wait); | |
595 | /* clear out any remaining data in the buffer */ | |
596 | cypress_buf_clear(priv->buf); | |
597 | spin_unlock_irqrestore(&priv->lock, flags); | |
598 | ||
599 | /* wait for characters to drain from device */ | |
600 | bps = tty_get_baud_rate(port->tty); | |
601 | if (bps > 1200) | |
602 | timeout = max((HZ*2560)/bps,HZ/10); | |
603 | else | |
604 | timeout = 2*HZ; | |
605 | set_current_state(TASK_INTERRUPTIBLE); | |
606 | schedule_timeout(timeout); | |
607 | ||
608 | dbg("%s - stopping urbs", __FUNCTION__); | |
609 | usb_kill_urb (port->interrupt_in_urb); | |
610 | usb_kill_urb (port->interrupt_out_urb); | |
611 | ||
612 | if (port->tty) { | |
613 | c_cflag = port->tty->termios->c_cflag; | |
614 | if (c_cflag & HUPCL) { | |
615 | /* drop dtr and rts */ | |
616 | priv = usb_get_serial_port_data(port); | |
617 | spin_lock_irqsave(&priv->lock, flags); | |
618 | priv->line_control = 0; | |
619 | priv->cmd_ctrl = 1; | |
620 | spin_unlock_irqrestore(&priv->lock, flags); | |
621 | cypress_write(port, NULL, 0); | |
622 | } | |
623 | } | |
624 | ||
625 | if (stats) | |
626 | dev_info (&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", | |
627 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
628 | } /* cypress_close */ | |
629 | ||
630 | ||
631 | static int cypress_write(struct usb_serial_port *port, const unsigned char *buf, int count) | |
632 | { | |
633 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
634 | unsigned long flags; | |
635 | ||
636 | dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); | |
637 | ||
638 | /* line control commands, which need to be executed immediately, | |
639 | are not put into the buffer for obvious reasons. | |
640 | */ | |
641 | if (priv->cmd_ctrl) { | |
642 | count = 0; | |
643 | goto finish; | |
644 | } | |
645 | ||
646 | if (!count) | |
647 | return count; | |
648 | ||
649 | spin_lock_irqsave(&priv->lock, flags); | |
650 | count = cypress_buf_put(priv->buf, buf, count); | |
651 | spin_unlock_irqrestore(&priv->lock, flags); | |
652 | ||
653 | finish: | |
654 | cypress_send(port); | |
655 | ||
656 | return count; | |
657 | } /* cypress_write */ | |
658 | ||
659 | ||
660 | static void cypress_send(struct usb_serial_port *port) | |
661 | { | |
662 | int count = 0, result, offset, actual_size; | |
663 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
664 | unsigned long flags; | |
665 | ||
666 | dbg("%s - port %d", __FUNCTION__, port->number); | |
667 | dbg("%s - interrupt out size is %d", __FUNCTION__, port->interrupt_out_size); | |
668 | ||
669 | spin_lock_irqsave(&priv->lock, flags); | |
670 | if (priv->write_urb_in_use) { | |
671 | dbg("%s - can't write, urb in use", __FUNCTION__); | |
672 | spin_unlock_irqrestore(&priv->lock, flags); | |
673 | return; | |
674 | } | |
675 | spin_unlock_irqrestore(&priv->lock, flags); | |
676 | ||
677 | /* clear buffer */ | |
678 | memset(port->interrupt_out_urb->transfer_buffer, 0, port->interrupt_out_size); | |
679 | ||
680 | spin_lock_irqsave(&priv->lock, flags); | |
681 | switch (port->interrupt_out_size) { | |
682 | case 32: | |
683 | // this is for the CY7C64013... | |
684 | offset = 2; | |
685 | port->interrupt_out_buffer[0] = priv->line_control; | |
686 | break; | |
687 | case 8: | |
688 | // this is for the CY7C63743... | |
689 | offset = 1; | |
690 | port->interrupt_out_buffer[0] = priv->line_control; | |
691 | break; | |
692 | default: | |
693 | dbg("%s - wrong packet size", __FUNCTION__); | |
694 | spin_unlock_irqrestore(&priv->lock, flags); | |
695 | return; | |
696 | } | |
697 | ||
698 | if (priv->line_control & CONTROL_RESET) | |
699 | priv->line_control &= ~CONTROL_RESET; | |
700 | ||
701 | if (priv->cmd_ctrl) { | |
702 | priv->cmd_count++; | |
703 | dbg("%s - line control command being issued", __FUNCTION__); | |
704 | spin_unlock_irqrestore(&priv->lock, flags); | |
705 | goto send; | |
706 | } else | |
707 | spin_unlock_irqrestore(&priv->lock, flags); | |
708 | ||
709 | count = cypress_buf_get(priv->buf, &port->interrupt_out_buffer[offset], | |
710 | port->interrupt_out_size-offset); | |
711 | ||
712 | if (count == 0) { | |
713 | return; | |
714 | } | |
715 | ||
716 | switch (port->interrupt_out_size) { | |
717 | case 32: | |
718 | port->interrupt_out_buffer[1] = count; | |
719 | break; | |
720 | case 8: | |
721 | port->interrupt_out_buffer[0] |= count; | |
722 | } | |
723 | ||
724 | dbg("%s - count is %d", __FUNCTION__, count); | |
725 | ||
726 | send: | |
727 | spin_lock_irqsave(&priv->lock, flags); | |
728 | priv->write_urb_in_use = 1; | |
729 | spin_unlock_irqrestore(&priv->lock, flags); | |
730 | ||
731 | if (priv->cmd_ctrl) | |
732 | actual_size = 1; | |
733 | else | |
734 | actual_size = count + (port->interrupt_out_size == 32 ? 2 : 1); | |
735 | ||
736 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, port->interrupt_out_size, | |
737 | port->interrupt_out_urb->transfer_buffer); | |
738 | ||
739 | port->interrupt_out_urb->transfer_buffer_length = actual_size; | |
740 | port->interrupt_out_urb->dev = port->serial->dev; | |
741 | result = usb_submit_urb (port->interrupt_out_urb, GFP_ATOMIC); | |
742 | if (result) { | |
743 | dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, | |
744 | result); | |
745 | priv->write_urb_in_use = 0; | |
746 | } | |
747 | ||
748 | spin_lock_irqsave(&priv->lock, flags); | |
749 | if (priv->cmd_ctrl) { | |
750 | priv->cmd_ctrl = 0; | |
751 | } | |
752 | priv->bytes_out += count; /* do not count the line control and size bytes */ | |
753 | spin_unlock_irqrestore(&priv->lock, flags); | |
754 | ||
755 | schedule_work(&port->work); | |
756 | } /* cypress_send */ | |
757 | ||
758 | ||
759 | /* returns how much space is available in the soft buffer */ | |
760 | static int cypress_write_room(struct usb_serial_port *port) | |
761 | { | |
762 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
763 | int room = 0; | |
764 | unsigned long flags; | |
765 | ||
766 | dbg("%s - port %d", __FUNCTION__, port->number); | |
767 | ||
768 | spin_lock_irqsave(&priv->lock, flags); | |
769 | room = cypress_buf_space_avail(priv->buf); | |
770 | spin_unlock_irqrestore(&priv->lock, flags); | |
771 | ||
772 | dbg("%s - returns %d", __FUNCTION__, room); | |
773 | return room; | |
774 | } | |
775 | ||
776 | ||
777 | static int cypress_tiocmget (struct usb_serial_port *port, struct file *file) | |
778 | { | |
779 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
780 | __u8 status, control; | |
781 | unsigned int result = 0; | |
782 | unsigned long flags; | |
783 | ||
784 | dbg("%s - port %d", __FUNCTION__, port->number); | |
785 | ||
786 | spin_lock_irqsave(&priv->lock, flags); | |
787 | control = priv->line_control; | |
788 | status = priv->current_status; | |
789 | spin_unlock_irqrestore(&priv->lock, flags); | |
790 | ||
791 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
792 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
793 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
794 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
795 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
796 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
797 | ||
798 | dbg("%s - result = %x", __FUNCTION__, result); | |
799 | ||
800 | return result; | |
801 | } | |
802 | ||
803 | ||
804 | static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, | |
805 | unsigned int set, unsigned int clear) | |
806 | { | |
807 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
808 | unsigned long flags; | |
809 | ||
810 | dbg("%s - port %d", __FUNCTION__, port->number); | |
811 | ||
812 | spin_lock_irqsave(&priv->lock, flags); | |
813 | if (set & TIOCM_RTS) | |
814 | priv->line_control |= CONTROL_RTS; | |
815 | if (set & TIOCM_DTR) | |
816 | priv->line_control |= CONTROL_DTR; | |
817 | if (clear & TIOCM_RTS) | |
818 | priv->line_control &= ~CONTROL_RTS; | |
819 | if (clear & TIOCM_DTR) | |
820 | priv->line_control &= ~CONTROL_DTR; | |
821 | spin_unlock_irqrestore(&priv->lock, flags); | |
822 | ||
823 | priv->cmd_ctrl = 1; | |
824 | return cypress_write(port, NULL, 0); | |
825 | } | |
826 | ||
827 | ||
828 | static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) | |
829 | { | |
830 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
831 | ||
832 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); | |
833 | ||
834 | switch (cmd) { | |
835 | case TIOCGSERIAL: | |
836 | if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { | |
837 | return -EFAULT; | |
838 | } | |
839 | return (0); | |
840 | break; | |
841 | case TIOCSSERIAL: | |
842 | if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { | |
843 | return -EFAULT; | |
844 | } | |
845 | /* here we need to call cypress_set_termios to invoke the new settings */ | |
846 | cypress_set_termios(port, &priv->tmp_termios); | |
847 | return (0); | |
848 | break; | |
849 | /* these are called when setting baud rate from gpsd */ | |
850 | case TCGETS: | |
851 | if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { | |
852 | return -EFAULT; | |
853 | } | |
854 | return (0); | |
855 | break; | |
856 | case TCSETS: | |
857 | if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { | |
858 | return -EFAULT; | |
859 | } | |
860 | /* here we need to call cypress_set_termios to invoke the new settings */ | |
861 | cypress_set_termios(port, &priv->tmp_termios); | |
862 | return (0); | |
863 | break; | |
864 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ | |
865 | case TIOCMIWAIT: | |
866 | while (priv != NULL) { | |
867 | interruptible_sleep_on(&priv->delta_msr_wait); | |
868 | /* see if a signal did it */ | |
869 | if (signal_pending(current)) | |
870 | return -ERESTARTSYS; | |
871 | else { | |
872 | char diff = priv->diff_status; | |
873 | ||
874 | if (diff == 0) { | |
875 | return -EIO; /* no change => error */ | |
876 | } | |
877 | ||
878 | /* consume all events */ | |
879 | priv->diff_status = 0; | |
880 | ||
881 | /* return 0 if caller wanted to know about these bits */ | |
882 | if ( ((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
883 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
884 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
885 | ((arg & TIOCM_CTS) && (diff & UART_CTS)) ) { | |
886 | return 0; | |
887 | } | |
888 | /* otherwise caller can't care less about what happened, | |
889 | * and so we continue to wait for more events. | |
890 | */ | |
891 | } | |
892 | } | |
893 | return 0; | |
894 | break; | |
895 | default: | |
896 | break; | |
897 | } | |
898 | ||
899 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __FUNCTION__, cmd); | |
900 | ||
901 | return -ENOIOCTLCMD; | |
902 | } /* cypress_ioctl */ | |
903 | ||
904 | ||
905 | static void cypress_set_termios (struct usb_serial_port *port, struct termios *old_termios) | |
906 | { | |
907 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
908 | struct tty_struct *tty; | |
909 | int data_bits, stop_bits, parity_type, parity_enable; | |
910 | unsigned cflag, iflag, baud_mask; | |
911 | unsigned long flags; | |
912 | __u8 oldlines; | |
913 | int linechange; | |
914 | ||
915 | dbg("%s - port %d", __FUNCTION__, port->number); | |
916 | ||
917 | tty = port->tty; | |
918 | if ((!tty) || (!tty->termios)) { | |
919 | dbg("%s - no tty structures", __FUNCTION__); | |
920 | return; | |
921 | } | |
922 | ||
923 | spin_lock_irqsave(&priv->lock, flags); | |
924 | if (!priv->termios_initialized) { | |
925 | if (priv->chiptype == CT_EARTHMATE) { | |
926 | *(tty->termios) = tty_std_termios; | |
927 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | CLOCAL; | |
928 | } else if (priv->chiptype == CT_CYPHIDCOM) { | |
929 | *(tty->termios) = tty_std_termios; | |
930 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
931 | } | |
932 | priv->termios_initialized = 1; | |
933 | } | |
934 | spin_unlock_irqrestore(&priv->lock, flags); | |
935 | ||
936 | cflag = tty->termios->c_cflag; | |
937 | iflag = tty->termios->c_iflag; | |
938 | ||
939 | /* check if there are new settings */ | |
940 | if (old_termios) { | |
941 | if ((cflag != old_termios->c_cflag) || | |
942 | (RELEVANT_IFLAG(iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) { | |
943 | dbg("%s - attempting to set new termios settings", __FUNCTION__); | |
944 | /* should make a copy of this in case something goes wrong in the function, we can restore it */ | |
945 | spin_lock_irqsave(&priv->lock, flags); | |
946 | priv->tmp_termios = *(tty->termios); | |
947 | spin_unlock_irqrestore(&priv->lock, flags); | |
948 | } else { | |
949 | dbg("%s - nothing to do, exiting", __FUNCTION__); | |
950 | return; | |
951 | } | |
952 | } else | |
953 | return; | |
954 | ||
955 | /* set number of data bits, parity, stop bits */ | |
956 | /* when parity is disabled the parity type bit is ignored */ | |
957 | ||
958 | stop_bits = cflag & CSTOPB ? 1 : 0; /* 1 means 2 stop bits, 0 means 1 stop bit */ | |
959 | ||
960 | if (cflag & PARENB) { | |
961 | parity_enable = 1; | |
962 | parity_type = cflag & PARODD ? 1 : 0; /* 1 means odd parity, 0 means even parity */ | |
963 | } else | |
964 | parity_enable = parity_type = 0; | |
965 | ||
966 | if (cflag & CSIZE) { | |
967 | switch (cflag & CSIZE) { | |
968 | case CS5: data_bits = 0; break; | |
969 | case CS6: data_bits = 1; break; | |
970 | case CS7: data_bits = 2; break; | |
971 | case CS8: data_bits = 3; break; | |
972 | default: err("%s - CSIZE was set, but not CS5-CS8", __FUNCTION__); data_bits = 3; | |
973 | } | |
974 | } else | |
975 | data_bits = 3; | |
976 | ||
977 | spin_lock_irqsave(&priv->lock, flags); | |
978 | oldlines = priv->line_control; | |
979 | if ((cflag & CBAUD) == B0) { | |
980 | /* drop dtr and rts */ | |
981 | dbg("%s - dropping the lines, baud rate 0bps", __FUNCTION__); | |
982 | baud_mask = B0; | |
983 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
984 | } else { | |
985 | baud_mask = (cflag & CBAUD); | |
986 | switch(baud_mask) { | |
987 | case B300: dbg("%s - setting baud 300bps", __FUNCTION__); break; | |
988 | case B600: dbg("%s - setting baud 600bps", __FUNCTION__); break; | |
989 | case B1200: dbg("%s - setting baud 1200bps", __FUNCTION__); break; | |
990 | case B2400: dbg("%s - setting baud 2400bps", __FUNCTION__); break; | |
991 | case B4800: dbg("%s - setting baud 4800bps", __FUNCTION__); break; | |
992 | case B9600: dbg("%s - setting baud 9600bps", __FUNCTION__); break; | |
993 | case B19200: dbg("%s - setting baud 19200bps", __FUNCTION__); break; | |
994 | case B38400: dbg("%s - setting baud 38400bps", __FUNCTION__); break; | |
995 | case B57600: dbg("%s - setting baud 57600bps", __FUNCTION__); break; | |
996 | case B115200: dbg("%s - setting baud 115200bps", __FUNCTION__); break; | |
997 | default: dbg("%s - unknown masked baud rate", __FUNCTION__); | |
998 | } | |
999 | priv->line_control |= CONTROL_DTR; | |
1000 | ||
1001 | /* toggle CRTSCTS? - don't do this if being called from cypress_open */ | |
1002 | if (!priv->calledfromopen) { | |
1003 | if (cflag & CRTSCTS) | |
1004 | priv->line_control |= CONTROL_RTS; | |
1005 | else | |
1006 | priv->line_control &= ~CONTROL_RTS; | |
1007 | } | |
1008 | } | |
1009 | spin_unlock_irqrestore(&priv->lock, flags); | |
1010 | ||
1011 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, %d data_bits (+5)", __FUNCTION__, | |
1012 | stop_bits, parity_enable, parity_type, data_bits); | |
1013 | ||
1014 | cypress_serial_control(port, baud_mask, data_bits, stop_bits, parity_enable, | |
1015 | parity_type, 0, CYPRESS_SET_CONFIG); | |
1016 | ||
1017 | msleep(50); /* give some time between change and read (50ms) */ | |
1018 | ||
1019 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are filled into the private structure | |
1020 | * this should confirm that all is working if it returns what we just set */ | |
1021 | cypress_serial_control(port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); | |
1022 | ||
1023 | /* Here we can define custom tty settings for devices | |
1024 | * | |
1025 | * the main tty termios flag base comes from empeg.c | |
1026 | */ | |
1027 | ||
1028 | spin_lock_irqsave(&priv->lock, flags); | |
1029 | if ( (priv->chiptype == CT_EARTHMATE) && (priv->baud_rate == 4800) ) { | |
1030 | ||
1031 | dbg("Using custom termios settings for a baud rate of 4800bps."); | |
1032 | /* define custom termios settings for NMEA protocol */ | |
1033 | ||
1034 | ||
1035 | tty->termios->c_iflag /* input modes - */ | |
1036 | &= ~(IGNBRK /* disable ignore break */ | |
1037 | | BRKINT /* disable break causes interrupt */ | |
1038 | | PARMRK /* disable mark parity errors */ | |
1039 | | ISTRIP /* disable clear high bit of input characters */ | |
1040 | | INLCR /* disable translate NL to CR */ | |
1041 | | IGNCR /* disable ignore CR */ | |
1042 | | ICRNL /* disable translate CR to NL */ | |
1043 | | IXON); /* disable enable XON/XOFF flow control */ | |
1044 | ||
1045 | tty->termios->c_oflag /* output modes */ | |
1046 | &= ~OPOST; /* disable postprocess output characters */ | |
1047 | ||
1048 | tty->termios->c_lflag /* line discipline modes */ | |
1049 | &= ~(ECHO /* disable echo input characters */ | |
1050 | | ECHONL /* disable echo new line */ | |
1051 | | ICANON /* disable erase, kill, werase, and rprnt special characters */ | |
1052 | | ISIG /* disable interrupt, quit, and suspend special characters */ | |
1053 | | IEXTEN); /* disable non-POSIX special characters */ | |
1054 | ||
1055 | } else if (priv->chiptype == CT_CYPHIDCOM) { | |
1056 | ||
1057 | // Software app handling it for device... | |
1058 | ||
1059 | } | |
1060 | linechange = (priv->line_control != oldlines); | |
1061 | spin_unlock_irqrestore(&priv->lock, flags); | |
1062 | ||
1063 | /* if necessary, set lines */ | |
1064 | if (!priv->calledfromopen && linechange) { | |
1065 | priv->cmd_ctrl = 1; | |
1066 | cypress_write(port, NULL, 0); | |
1067 | } | |
1068 | ||
1069 | if (priv->calledfromopen) | |
1070 | priv->calledfromopen = 0; | |
1071 | ||
1072 | } /* cypress_set_termios */ | |
1073 | ||
1074 | ||
1075 | /* returns amount of data still left in soft buffer */ | |
1076 | static int cypress_chars_in_buffer(struct usb_serial_port *port) | |
1077 | { | |
1078 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1079 | int chars = 0; | |
1080 | unsigned long flags; | |
1081 | ||
1082 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1083 | ||
1084 | spin_lock_irqsave(&priv->lock, flags); | |
1085 | chars = cypress_buf_data_avail(priv->buf); | |
1086 | spin_unlock_irqrestore(&priv->lock, flags); | |
1087 | ||
1088 | dbg("%s - returns %d", __FUNCTION__, chars); | |
1089 | return chars; | |
1090 | } | |
1091 | ||
1092 | ||
1093 | static void cypress_throttle (struct usb_serial_port *port) | |
1094 | { | |
1095 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1096 | unsigned long flags; | |
1097 | ||
1098 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1099 | ||
1100 | spin_lock_irqsave(&priv->lock, flags); | |
1101 | priv->rx_flags = THROTTLED; | |
1102 | spin_unlock_irqrestore(&priv->lock, flags); | |
1103 | } | |
1104 | ||
1105 | ||
1106 | static void cypress_unthrottle (struct usb_serial_port *port) | |
1107 | { | |
1108 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1109 | int actually_throttled, result; | |
1110 | unsigned long flags; | |
1111 | ||
1112 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1113 | ||
1114 | spin_lock_irqsave(&priv->lock, flags); | |
1115 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; | |
1116 | priv->rx_flags = 0; | |
1117 | spin_unlock_irqrestore(&priv->lock, flags); | |
1118 | ||
1119 | if (actually_throttled) { | |
1120 | port->interrupt_in_urb->dev = port->serial->dev; | |
1121 | ||
1122 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); | |
1123 | if (result) | |
1124 | dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | ||
1129 | static void cypress_read_int_callback(struct urb *urb, struct pt_regs *regs) | |
1130 | { | |
1131 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
1132 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1133 | struct tty_struct *tty; | |
1134 | unsigned char *data = urb->transfer_buffer; | |
1135 | unsigned long flags; | |
1136 | char tty_flag = TTY_NORMAL; | |
1137 | int havedata = 0; | |
1138 | int bytes = 0; | |
1139 | int result; | |
1140 | int i = 0; | |
1141 | ||
1142 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1143 | ||
1144 | if (urb->status) { | |
1145 | dbg("%s - nonzero read status received: %d", __FUNCTION__, urb->status); | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | spin_lock_irqsave(&priv->lock, flags); | |
1150 | if (priv->rx_flags & THROTTLED) { | |
1151 | dbg("%s - now throttling", __FUNCTION__); | |
1152 | priv->rx_flags |= ACTUALLY_THROTTLED; | |
1153 | spin_unlock_irqrestore(&priv->lock, flags); | |
1154 | return; | |
1155 | } | |
1156 | spin_unlock_irqrestore(&priv->lock, flags); | |
1157 | ||
1158 | tty = port->tty; | |
1159 | if (!tty) { | |
1160 | dbg("%s - bad tty pointer - exiting", __FUNCTION__); | |
1161 | return; | |
1162 | } | |
1163 | ||
1164 | spin_lock_irqsave(&priv->lock, flags); | |
1165 | switch(urb->actual_length) { | |
1166 | case 32: | |
1167 | // This is for the CY7C64013... | |
1168 | priv->current_status = data[0] & 0xF8; | |
1169 | bytes = data[1]+2; | |
1170 | i=2; | |
1171 | if (bytes > 2) | |
1172 | havedata = 1; | |
1173 | break; | |
1174 | case 8: | |
1175 | // This is for the CY7C63743... | |
1176 | priv->current_status = data[0] & 0xF8; | |
1177 | bytes = (data[0] & 0x07)+1; | |
1178 | i=1; | |
1179 | if (bytes > 1) | |
1180 | havedata = 1; | |
1181 | break; | |
1182 | default: | |
1183 | dbg("%s - wrong packet size - received %d bytes", __FUNCTION__, urb->actual_length); | |
1184 | spin_unlock_irqrestore(&priv->lock, flags); | |
1185 | goto continue_read; | |
1186 | } | |
1187 | spin_unlock_irqrestore(&priv->lock, flags); | |
1188 | ||
1189 | usb_serial_debug_data (debug, &port->dev, __FUNCTION__, urb->actual_length, data); | |
1190 | ||
1191 | spin_lock_irqsave(&priv->lock, flags); | |
1192 | /* check to see if status has changed */ | |
1193 | if (priv != NULL) { | |
1194 | if (priv->current_status != priv->prev_status) { | |
1195 | priv->diff_status |= priv->current_status ^ priv->prev_status; | |
1196 | wake_up_interruptible(&priv->delta_msr_wait); | |
1197 | priv->prev_status = priv->current_status; | |
1198 | } | |
1199 | } | |
1200 | spin_unlock_irqrestore(&priv->lock, flags); | |
1201 | ||
1202 | /* hangup, as defined in acm.c... this might be a bad place for it though */ | |
1203 | if (tty && !(tty->termios->c_cflag & CLOCAL) && !(priv->current_status & UART_CD)) { | |
1204 | dbg("%s - calling hangup", __FUNCTION__); | |
1205 | tty_hangup(tty); | |
1206 | goto continue_read; | |
1207 | } | |
1208 | ||
1209 | /* There is one error bit... I'm assuming it is a parity error indicator | |
1210 | * as the generic firmware will set this bit to 1 if a parity error occurs. | |
1211 | * I can not find reference to any other error events. | |
1212 | * | |
1213 | */ | |
1214 | spin_lock_irqsave(&priv->lock, flags); | |
1215 | if (priv->current_status & CYP_ERROR) { | |
1216 | spin_unlock_irqrestore(&priv->lock, flags); | |
1217 | tty_flag = TTY_PARITY; | |
1218 | dbg("%s - Parity Error detected", __FUNCTION__); | |
1219 | } else | |
1220 | spin_unlock_irqrestore(&priv->lock, flags); | |
1221 | ||
1222 | /* process read if there is data other than line status */ | |
1223 | if (tty && (bytes > i)) { | |
1224 | for (; i < bytes ; ++i) { | |
1225 | dbg("pushing byte number %d - %d - %c",i,data[i],data[i]); | |
1226 | if(tty->flip.count >= TTY_FLIPBUF_SIZE) { | |
1227 | tty_flip_buffer_push(tty); | |
1228 | } | |
1229 | tty_insert_flip_char(tty, data[i], tty_flag); | |
1230 | } | |
1231 | tty_flip_buffer_push(port->tty); | |
1232 | } | |
1233 | ||
1234 | spin_lock_irqsave(&priv->lock, flags); | |
1235 | priv->bytes_in += bytes; /* control and status byte(s) are also counted */ | |
1236 | spin_unlock_irqrestore(&priv->lock, flags); | |
1237 | ||
1238 | continue_read: | |
1239 | ||
1240 | /* Continue trying to always read... unless the port has closed. */ | |
1241 | ||
1242 | if (port->open_count > 0) { | |
1243 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, | |
1244 | usb_rcvintpipe(port->serial->dev, port->interrupt_in_endpointAddress), | |
1245 | port->interrupt_in_urb->transfer_buffer, | |
1246 | port->interrupt_in_urb->transfer_buffer_length, | |
1247 | cypress_read_int_callback, port, | |
1248 | port->interrupt_in_urb->interval); | |
1249 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); | |
1250 | if (result) | |
1251 | dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); | |
1252 | } | |
1253 | ||
1254 | return; | |
1255 | } /* cypress_read_int_callback */ | |
1256 | ||
1257 | ||
1258 | static void cypress_write_int_callback(struct urb *urb, struct pt_regs *regs) | |
1259 | { | |
1260 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
1261 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1262 | int result; | |
1263 | ||
1264 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1265 | ||
1266 | switch (urb->status) { | |
1267 | case 0: | |
1268 | /* success */ | |
1269 | break; | |
1270 | case -ECONNRESET: | |
1271 | case -ENOENT: | |
1272 | case -ESHUTDOWN: | |
1273 | /* this urb is terminated, clean up */ | |
1274 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); | |
1275 | priv->write_urb_in_use = 0; | |
1276 | return; | |
1277 | default: | |
1278 | /* error in the urb, so we have to resubmit it */ | |
1279 | dbg("%s - Overflow in write", __FUNCTION__); | |
1280 | dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); | |
1281 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
1282 | port->interrupt_out_urb->dev = port->serial->dev; | |
1283 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); | |
1284 | if (result) | |
1285 | dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", | |
1286 | __FUNCTION__, result); | |
1287 | else | |
1288 | return; | |
1289 | } | |
1290 | ||
1291 | priv->write_urb_in_use = 0; | |
1292 | ||
1293 | /* send any buffered data */ | |
1294 | cypress_send(port); | |
1295 | } | |
1296 | ||
1297 | ||
1298 | /***************************************************************************** | |
1299 | * Write buffer functions - buffering code from pl2303 used | |
1300 | *****************************************************************************/ | |
1301 | ||
1302 | /* | |
1303 | * cypress_buf_alloc | |
1304 | * | |
1305 | * Allocate a circular buffer and all associated memory. | |
1306 | */ | |
1307 | ||
1308 | static struct cypress_buf *cypress_buf_alloc(unsigned int size) | |
1309 | { | |
1310 | ||
1311 | struct cypress_buf *cb; | |
1312 | ||
1313 | ||
1314 | if (size == 0) | |
1315 | return NULL; | |
1316 | ||
1317 | cb = (struct cypress_buf *)kmalloc(sizeof(struct cypress_buf), GFP_KERNEL); | |
1318 | if (cb == NULL) | |
1319 | return NULL; | |
1320 | ||
1321 | cb->buf_buf = kmalloc(size, GFP_KERNEL); | |
1322 | if (cb->buf_buf == NULL) { | |
1323 | kfree(cb); | |
1324 | return NULL; | |
1325 | } | |
1326 | ||
1327 | cb->buf_size = size; | |
1328 | cb->buf_get = cb->buf_put = cb->buf_buf; | |
1329 | ||
1330 | return cb; | |
1331 | ||
1332 | } | |
1333 | ||
1334 | ||
1335 | /* | |
1336 | * cypress_buf_free | |
1337 | * | |
1338 | * Free the buffer and all associated memory. | |
1339 | */ | |
1340 | ||
1341 | static void cypress_buf_free(struct cypress_buf *cb) | |
1342 | { | |
1343 | if (cb != NULL) { | |
1344 | if (cb->buf_buf != NULL) | |
1345 | kfree(cb->buf_buf); | |
1346 | kfree(cb); | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | ||
1351 | /* | |
1352 | * cypress_buf_clear | |
1353 | * | |
1354 | * Clear out all data in the circular buffer. | |
1355 | */ | |
1356 | ||
1357 | static void cypress_buf_clear(struct cypress_buf *cb) | |
1358 | { | |
1359 | if (cb != NULL) | |
1360 | cb->buf_get = cb->buf_put; | |
1361 | /* equivalent to a get of all data available */ | |
1362 | } | |
1363 | ||
1364 | ||
1365 | /* | |
1366 | * cypress_buf_data_avail | |
1367 | * | |
1368 | * Return the number of bytes of data available in the circular | |
1369 | * buffer. | |
1370 | */ | |
1371 | ||
1372 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb) | |
1373 | { | |
1374 | if (cb != NULL) | |
1375 | return ((cb->buf_size + cb->buf_put - cb->buf_get) % cb->buf_size); | |
1376 | else | |
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | ||
1381 | /* | |
1382 | * cypress_buf_space_avail | |
1383 | * | |
1384 | * Return the number of bytes of space available in the circular | |
1385 | * buffer. | |
1386 | */ | |
1387 | ||
1388 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb) | |
1389 | { | |
1390 | if (cb != NULL) | |
1391 | return ((cb->buf_size + cb->buf_get - cb->buf_put - 1) % cb->buf_size); | |
1392 | else | |
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | ||
1397 | /* | |
1398 | * cypress_buf_put | |
1399 | * | |
1400 | * Copy data data from a user buffer and put it into the circular buffer. | |
1401 | * Restrict to the amount of space available. | |
1402 | * | |
1403 | * Return the number of bytes copied. | |
1404 | */ | |
1405 | ||
1406 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, | |
1407 | unsigned int count) | |
1408 | { | |
1409 | ||
1410 | unsigned int len; | |
1411 | ||
1412 | ||
1413 | if (cb == NULL) | |
1414 | return 0; | |
1415 | ||
1416 | len = cypress_buf_space_avail(cb); | |
1417 | if (count > len) | |
1418 | count = len; | |
1419 | ||
1420 | if (count == 0) | |
1421 | return 0; | |
1422 | ||
1423 | len = cb->buf_buf + cb->buf_size - cb->buf_put; | |
1424 | if (count > len) { | |
1425 | memcpy(cb->buf_put, buf, len); | |
1426 | memcpy(cb->buf_buf, buf+len, count - len); | |
1427 | cb->buf_put = cb->buf_buf + count - len; | |
1428 | } else { | |
1429 | memcpy(cb->buf_put, buf, count); | |
1430 | if (count < len) | |
1431 | cb->buf_put += count; | |
1432 | else /* count == len */ | |
1433 | cb->buf_put = cb->buf_buf; | |
1434 | } | |
1435 | ||
1436 | return count; | |
1437 | ||
1438 | } | |
1439 | ||
1440 | ||
1441 | /* | |
1442 | * cypress_buf_get | |
1443 | * | |
1444 | * Get data from the circular buffer and copy to the given buffer. | |
1445 | * Restrict to the amount of data available. | |
1446 | * | |
1447 | * Return the number of bytes copied. | |
1448 | */ | |
1449 | ||
1450 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, | |
1451 | unsigned int count) | |
1452 | { | |
1453 | ||
1454 | unsigned int len; | |
1455 | ||
1456 | ||
1457 | if (cb == NULL) | |
1458 | return 0; | |
1459 | ||
1460 | len = cypress_buf_data_avail(cb); | |
1461 | if (count > len) | |
1462 | count = len; | |
1463 | ||
1464 | if (count == 0) | |
1465 | return 0; | |
1466 | ||
1467 | len = cb->buf_buf + cb->buf_size - cb->buf_get; | |
1468 | if (count > len) { | |
1469 | memcpy(buf, cb->buf_get, len); | |
1470 | memcpy(buf+len, cb->buf_buf, count - len); | |
1471 | cb->buf_get = cb->buf_buf + count - len; | |
1472 | } else { | |
1473 | memcpy(buf, cb->buf_get, count); | |
1474 | if (count < len) | |
1475 | cb->buf_get += count; | |
1476 | else /* count == len */ | |
1477 | cb->buf_get = cb->buf_buf; | |
1478 | } | |
1479 | ||
1480 | return count; | |
1481 | ||
1482 | } | |
1483 | ||
1484 | /***************************************************************************** | |
1485 | * Module functions | |
1486 | *****************************************************************************/ | |
1487 | ||
1488 | static int __init cypress_init(void) | |
1489 | { | |
1490 | int retval; | |
1491 | ||
1492 | dbg("%s", __FUNCTION__); | |
1493 | ||
1494 | retval = usb_serial_register(&cypress_earthmate_device); | |
1495 | if (retval) | |
1496 | goto failed_em_register; | |
1497 | retval = usb_serial_register(&cypress_hidcom_device); | |
1498 | if (retval) | |
1499 | goto failed_hidcom_register; | |
1500 | retval = usb_register(&cypress_driver); | |
1501 | if (retval) | |
1502 | goto failed_usb_register; | |
1503 | ||
1504 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1505 | return 0; | |
1506 | failed_usb_register: | |
1507 | usb_deregister(&cypress_driver); | |
1508 | failed_hidcom_register: | |
1509 | usb_serial_deregister(&cypress_hidcom_device); | |
1510 | failed_em_register: | |
1511 | usb_serial_deregister(&cypress_earthmate_device); | |
1512 | ||
1513 | return retval; | |
1514 | } | |
1515 | ||
1516 | ||
1517 | static void __exit cypress_exit (void) | |
1518 | { | |
1519 | dbg("%s", __FUNCTION__); | |
1520 | ||
1521 | usb_deregister (&cypress_driver); | |
1522 | usb_serial_deregister (&cypress_earthmate_device); | |
1523 | usb_serial_deregister (&cypress_hidcom_device); | |
1524 | } | |
1525 | ||
1526 | ||
1527 | module_init(cypress_init); | |
1528 | module_exit(cypress_exit); | |
1529 | ||
1530 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1531 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1532 | MODULE_VERSION( DRIVER_VERSION ); | |
1533 | MODULE_LICENSE("GPL"); | |
1534 | ||
1535 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1536 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1537 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1538 | MODULE_PARM_DESC(stats, "Enable statistics or not"); |