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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * USB Cypress M8 driver | |
3 | * | |
4 | * Copyright (C) 2004 | |
813a224f | 5 | * Lonnie Mendez (dignome@gmail.com) |
1da177e4 LT |
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 | * | |
813a224f AC |
14 | * See Documentation/usb/usb-serial.txt for more information on using this |
15 | * driver | |
1da177e4 LT |
16 | * |
17 | * See http://geocities.com/i0xox0i for information on this driver and the | |
18 | * earthmate usb device. | |
19 | * | |
3cb4a4f7 LM |
20 | * Lonnie Mendez <dignome@gmail.com> |
21 | * 4-29-2005 | |
813a224f AC |
22 | * Fixed problem where setting or retreiving the serial config would fail |
23 | * with EPIPE. Removed CRTS toggling so the driver behaves more like | |
24 | * other usbserial adapters. Issued new interval of 1ms instead of the | |
25 | * default 10ms. As a result, transfer speed has been substantially | |
26 | * increased from avg. 850bps to avg. 3300bps. initial termios has also | |
27 | * been modified. Cleaned up code and formatting issues so it is more | |
28 | * readable. Replaced the C++ style comments. | |
1da177e4 LT |
29 | * |
30 | * Lonnie Mendez <dignome@gmail.com> | |
31 | * 12-15-2004 | |
32 | * Incorporated write buffering from pl2303 driver. Fixed bug with line | |
33 | * handling so both lines are raised in cypress_open. (was dropping rts) | |
34 | * Various code cleanups made as well along with other misc bug fixes. | |
35 | * | |
36 | * Lonnie Mendez <dignome@gmail.com> | |
37 | * 04-10-2004 | |
38 | * Driver modified to support dynamic line settings. Various improvments | |
39 | * and features. | |
40 | * | |
41 | * Neil Whelchel | |
42 | * 10-2003 | |
43 | * Driver first released. | |
44 | * | |
1da177e4 LT |
45 | */ |
46 | ||
813a224f AC |
47 | /* Thanks to Neil Whelchel for writing the first cypress m8 implementation |
48 | for linux. */ | |
1da177e4 LT |
49 | /* Thanks to cypress for providing references for the hid reports. */ |
50 | /* Thanks to Jiang Zhang for providing links and for general help. */ | |
813a224f | 51 | /* Code originates and was built up from ftdi_sio, belkin, pl2303 and others.*/ |
1da177e4 LT |
52 | |
53 | ||
1da177e4 LT |
54 | #include <linux/kernel.h> |
55 | #include <linux/errno.h> | |
56 | #include <linux/init.h> | |
57 | #include <linux/slab.h> | |
58 | #include <linux/tty.h> | |
59 | #include <linux/tty_driver.h> | |
60 | #include <linux/tty_flip.h> | |
61 | #include <linux/module.h> | |
62 | #include <linux/moduleparam.h> | |
63 | #include <linux/spinlock.h> | |
64 | #include <linux/usb.h> | |
a969888c | 65 | #include <linux/usb/serial.h> |
1da177e4 LT |
66 | #include <linux/serial.h> |
67 | #include <linux/delay.h> | |
813a224f | 68 | #include <linux/uaccess.h> |
1da177e4 | 69 | |
1da177e4 LT |
70 | #include "cypress_m8.h" |
71 | ||
72 | ||
73 | #ifdef CONFIG_USB_SERIAL_DEBUG | |
74 | static int debug = 1; | |
75 | #else | |
76 | static int debug; | |
77 | #endif | |
78 | static int stats; | |
3cb4a4f7 | 79 | static int interval; |
1da177e4 LT |
80 | |
81 | /* | |
82 | * Version Information | |
83 | */ | |
3cb4a4f7 | 84 | #define DRIVER_VERSION "v1.09" |
1da177e4 LT |
85 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
86 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
87 | ||
88 | /* write buffer size defines */ | |
89 | #define CYPRESS_BUF_SIZE 1024 | |
90 | #define CYPRESS_CLOSING_WAIT (30*HZ) | |
91 | ||
92 | static struct usb_device_id id_table_earthmate [] = { | |
93 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
25b6f08e | 94 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
95 | { } /* Terminating entry */ |
96 | }; | |
97 | ||
98 | static struct usb_device_id id_table_cyphidcomrs232 [] = { | |
99 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, | |
6f6f06ee | 100 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
1da177e4 LT |
101 | { } /* Terminating entry */ |
102 | }; | |
103 | ||
a5c44e29 LM |
104 | static struct usb_device_id id_table_nokiaca42v2 [] = { |
105 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, | |
106 | { } /* Terminating entry */ | |
107 | }; | |
108 | ||
1da177e4 LT |
109 | static struct usb_device_id id_table_combined [] = { |
110 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
25b6f08e | 111 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 112 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 113 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
a5c44e29 | 114 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
115 | { } /* Terminating entry */ |
116 | }; | |
117 | ||
813a224f | 118 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
119 | |
120 | static struct usb_driver cypress_driver = { | |
121 | .name = "cypress", | |
122 | .probe = usb_serial_probe, | |
123 | .disconnect = usb_serial_disconnect, | |
124 | .id_table = id_table_combined, | |
ba9dc657 | 125 | .no_dynamic_id = 1, |
1da177e4 LT |
126 | }; |
127 | ||
3416eaa1 MI |
128 | enum packet_format { |
129 | packet_format_1, /* b0:status, b1:payload count */ | |
130 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
131 | }; | |
132 | ||
1da177e4 LT |
133 | struct cypress_private { |
134 | spinlock_t lock; /* private lock */ | |
135 | int chiptype; /* identifier of device, for quirks/etc */ | |
136 | int bytes_in; /* used for statistics */ | |
137 | int bytes_out; /* used for statistics */ | |
138 | int cmd_count; /* used for statistics */ | |
139 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
140 | struct cypress_buf *buf; /* write buffer */ | |
141 | int write_urb_in_use; /* write urb in use indicator */ | |
0257fa9f MI |
142 | int write_urb_interval; /* interval to use for write urb */ |
143 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 144 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
145 | int termios_initialized; |
146 | __u8 line_control; /* holds dtr / rts value */ | |
147 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
148 | __u8 current_config; /* stores the current configuration byte */ | |
149 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 150 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 151 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
152 | int baud_rate; /* stores current baud rate in |
153 | integer form */ | |
1da177e4 LT |
154 | int isthrottled; /* if throttled, discard reads */ |
155 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
156 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
813a224f AC |
157 | /* we pass a pointer to this as the arguement sent to |
158 | cypress_set_termios old_termios */ | |
606d099c | 159 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
160 | }; |
161 | ||
162 | /* write buffer structure */ | |
163 | struct cypress_buf { | |
164 | unsigned int buf_size; | |
165 | char *buf_buf; | |
166 | char *buf_get; | |
167 | char *buf_put; | |
168 | }; | |
169 | ||
170 | /* function prototypes for the Cypress USB to serial device */ | |
813a224f AC |
171 | static int cypress_earthmate_startup(struct usb_serial *serial); |
172 | static int cypress_hidcom_startup(struct usb_serial *serial); | |
173 | static int cypress_ca42v2_startup(struct usb_serial *serial); | |
174 | static void cypress_shutdown(struct usb_serial *serial); | |
175 | static int cypress_open(struct tty_struct *tty, | |
176 | struct usb_serial_port *port, struct file *filp); | |
177 | static void cypress_close(struct tty_struct *tty, | |
178 | struct usb_serial_port *port, struct file *filp); | |
179 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, | |
180 | const unsigned char *buf, int count); | |
181 | static void cypress_send(struct usb_serial_port *port); | |
182 | static int cypress_write_room(struct tty_struct *tty); | |
183 | static int cypress_ioctl(struct tty_struct *tty, struct file *file, | |
184 | unsigned int cmd, unsigned long arg); | |
185 | static void cypress_set_termios(struct tty_struct *tty, | |
186 | struct usb_serial_port *port, struct ktermios *old); | |
187 | static int cypress_tiocmget(struct tty_struct *tty, struct file *file); | |
188 | static int cypress_tiocmset(struct tty_struct *tty, struct file *file, | |
189 | unsigned int set, unsigned int clear); | |
190 | static int cypress_chars_in_buffer(struct tty_struct *tty); | |
191 | static void cypress_throttle(struct tty_struct *tty); | |
192 | static void cypress_unthrottle(struct tty_struct *tty); | |
193 | static void cypress_set_dead(struct usb_serial_port *port); | |
194 | static void cypress_read_int_callback(struct urb *urb); | |
195 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 LT |
196 | /* write buffer functions */ |
197 | static struct cypress_buf *cypress_buf_alloc(unsigned int size); | |
813a224f AC |
198 | static void cypress_buf_free(struct cypress_buf *cb); |
199 | static void cypress_buf_clear(struct cypress_buf *cb); | |
200 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb); | |
201 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb); | |
202 | static unsigned int cypress_buf_put(struct cypress_buf *cb, | |
203 | const char *buf, unsigned int count); | |
204 | static unsigned int cypress_buf_get(struct cypress_buf *cb, | |
205 | char *buf, unsigned int count); | |
1da177e4 LT |
206 | |
207 | ||
ea65370d | 208 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
209 | .driver = { |
210 | .owner = THIS_MODULE, | |
269bda1c | 211 | .name = "earthmate", |
18fcac35 | 212 | }, |
269bda1c | 213 | .description = "DeLorme Earthmate USB", |
d9b1b787 | 214 | .usb_driver = &cypress_driver, |
1da177e4 | 215 | .id_table = id_table_earthmate, |
1da177e4 LT |
216 | .num_ports = 1, |
217 | .attach = cypress_earthmate_startup, | |
218 | .shutdown = cypress_shutdown, | |
219 | .open = cypress_open, | |
220 | .close = cypress_close, | |
221 | .write = cypress_write, | |
222 | .write_room = cypress_write_room, | |
223 | .ioctl = cypress_ioctl, | |
224 | .set_termios = cypress_set_termios, | |
225 | .tiocmget = cypress_tiocmget, | |
226 | .tiocmset = cypress_tiocmset, | |
227 | .chars_in_buffer = cypress_chars_in_buffer, | |
228 | .throttle = cypress_throttle, | |
229 | .unthrottle = cypress_unthrottle, | |
230 | .read_int_callback = cypress_read_int_callback, | |
231 | .write_int_callback = cypress_write_int_callback, | |
232 | }; | |
233 | ||
ea65370d | 234 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
235 | .driver = { |
236 | .owner = THIS_MODULE, | |
269bda1c | 237 | .name = "cyphidcom", |
18fcac35 | 238 | }, |
269bda1c | 239 | .description = "HID->COM RS232 Adapter", |
d9b1b787 | 240 | .usb_driver = &cypress_driver, |
1da177e4 | 241 | .id_table = id_table_cyphidcomrs232, |
1da177e4 LT |
242 | .num_ports = 1, |
243 | .attach = cypress_hidcom_startup, | |
244 | .shutdown = cypress_shutdown, | |
245 | .open = cypress_open, | |
246 | .close = cypress_close, | |
247 | .write = cypress_write, | |
248 | .write_room = cypress_write_room, | |
249 | .ioctl = cypress_ioctl, | |
250 | .set_termios = cypress_set_termios, | |
251 | .tiocmget = cypress_tiocmget, | |
252 | .tiocmset = cypress_tiocmset, | |
253 | .chars_in_buffer = cypress_chars_in_buffer, | |
254 | .throttle = cypress_throttle, | |
255 | .unthrottle = cypress_unthrottle, | |
256 | .read_int_callback = cypress_read_int_callback, | |
257 | .write_int_callback = cypress_write_int_callback, | |
258 | }; | |
259 | ||
a5c44e29 LM |
260 | static struct usb_serial_driver cypress_ca42v2_device = { |
261 | .driver = { | |
262 | .owner = THIS_MODULE, | |
813a224f | 263 | .name = "nokiaca42v2", |
a5c44e29 LM |
264 | }, |
265 | .description = "Nokia CA-42 V2 Adapter", | |
d9b1b787 | 266 | .usb_driver = &cypress_driver, |
a5c44e29 | 267 | .id_table = id_table_nokiaca42v2, |
a5c44e29 LM |
268 | .num_ports = 1, |
269 | .attach = cypress_ca42v2_startup, | |
270 | .shutdown = cypress_shutdown, | |
271 | .open = cypress_open, | |
272 | .close = cypress_close, | |
273 | .write = cypress_write, | |
274 | .write_room = cypress_write_room, | |
275 | .ioctl = cypress_ioctl, | |
276 | .set_termios = cypress_set_termios, | |
277 | .tiocmget = cypress_tiocmget, | |
278 | .tiocmset = cypress_tiocmset, | |
279 | .chars_in_buffer = cypress_chars_in_buffer, | |
280 | .throttle = cypress_throttle, | |
281 | .unthrottle = cypress_unthrottle, | |
282 | .read_int_callback = cypress_read_int_callback, | |
283 | .write_int_callback = cypress_write_int_callback, | |
284 | }; | |
1da177e4 LT |
285 | |
286 | /***************************************************************************** | |
287 | * Cypress serial helper functions | |
288 | *****************************************************************************/ | |
289 | ||
290 | ||
8873aaa6 | 291 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 292 | { |
92983c21 MI |
293 | struct cypress_private *priv; |
294 | priv = usb_get_serial_port_data(port); | |
295 | ||
296 | /* | |
297 | * The general purpose firmware for the Cypress M8 allows for | |
298 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
299 | * chose to use the general purpose firmware or not), if you | |
300 | * need to modify this speed setting for your own project | |
301 | * please add your own chiptype and modify the code likewise. | |
302 | * The Cypress HID->COM device will work successfully up to | |
303 | * 115200bps (but the actual throughput is around 3kBps). | |
304 | */ | |
92983c21 MI |
305 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
306 | /* | |
307 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
308 | * Cypress app note that describes this mechanism | |
309 | * states the the low-speed part can't handle more | |
310 | * than 800 bytes/sec, in which case 4800 baud is the | |
311 | * safest speed for a part like that. | |
312 | */ | |
313 | if (new_rate > 4800) { | |
314 | dbg("%s - failed setting baud rate, device incapable " | |
315 | "speed %d", __func__, new_rate); | |
316 | return -1; | |
317 | } | |
318 | } | |
319 | switch (priv->chiptype) { | |
320 | case CT_EARTHMATE: | |
321 | if (new_rate <= 600) { | |
322 | /* 300 and 600 baud rates are supported under | |
323 | * the generic firmware, but are not used with | |
324 | * NMEA and SiRF protocols */ | |
325 | dbg("%s - failed setting baud rate, unsupported speed " | |
326 | "of %d on Earthmate GPS", __func__, new_rate); | |
327 | return -1; | |
328 | } | |
329 | break; | |
330 | default: | |
331 | break; | |
332 | } | |
333 | return new_rate; | |
334 | } | |
335 | ||
336 | ||
093cf723 | 337 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 338 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
339 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
340 | int stop_bits, int parity_enable, int parity_type, int reset, | |
341 | int cypress_request_type) | |
1da177e4 | 342 | { |
3cb4a4f7 | 343 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 344 | struct cypress_private *priv; |
93075544 | 345 | __u8 feature_buffer[5]; |
1da177e4 LT |
346 | unsigned long flags; |
347 | ||
441b62c1 | 348 | dbg("%s", __func__); |
813a224f | 349 | |
1da177e4 LT |
350 | priv = usb_get_serial_port_data(port); |
351 | ||
78aef519 MI |
352 | if (!priv->comm_is_ok) |
353 | return -ENODEV; | |
354 | ||
813a224f AC |
355 | switch (cypress_request_type) { |
356 | case CYPRESS_SET_CONFIG: | |
357 | new_baudrate = priv->baud_rate; | |
358 | /* 0 means 'Hang up' so doesn't change the true bit rate */ | |
359 | if (baud_rate == 0) | |
92983c21 | 360 | new_baudrate = priv->baud_rate; |
813a224f AC |
361 | /* Change of speed ? */ |
362 | else if (baud_rate != priv->baud_rate) { | |
363 | dbg("%s - baud rate is changing", __func__); | |
364 | retval = analyze_baud_rate(port, baud_rate); | |
365 | if (retval >= 0) { | |
366 | new_baudrate = retval; | |
367 | dbg("%s - New baud rate set to %d", | |
368 | __func__, new_baudrate); | |
1da177e4 | 369 | } |
813a224f AC |
370 | } |
371 | dbg("%s - baud rate is being sent as %d", | |
372 | __func__, new_baudrate); | |
373 | ||
374 | memset(feature_buffer, 0, sizeof(feature_buffer)); | |
375 | /* fill the feature_buffer with new configuration */ | |
376 | *((u_int32_t *)feature_buffer) = new_baudrate; | |
377 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ | |
378 | /* 1 bit gap */ | |
379 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
380 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
381 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
382 | /* 1 bit gap */ | |
383 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
384 | ||
385 | dbg("%s - device is being sent this feature report:", | |
386 | __func__); | |
387 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __func__, | |
388 | feature_buffer[0], feature_buffer[1], | |
389 | feature_buffer[2], feature_buffer[3], | |
390 | feature_buffer[4]); | |
391 | ||
392 | do { | |
393 | retval = usb_control_msg(port->serial->dev, | |
394 | usb_sndctrlpipe(port->serial->dev, 0), | |
395 | HID_REQ_SET_REPORT, | |
396 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
397 | 0x0300, 0, feature_buffer, | |
398 | sizeof(feature_buffer), 500); | |
399 | ||
400 | if (tries++ >= 3) | |
401 | break; | |
402 | ||
403 | } while (retval != sizeof(feature_buffer) && | |
404 | retval != -ENODEV); | |
405 | ||
406 | if (retval != sizeof(feature_buffer)) { | |
407 | err("%s - failed sending serial line settings - %d", | |
408 | __func__, retval); | |
409 | cypress_set_dead(port); | |
410 | } else { | |
411 | spin_lock_irqsave(&priv->lock, flags); | |
412 | priv->baud_rate = new_baudrate; | |
413 | priv->current_config = feature_buffer[4]; | |
414 | spin_unlock_irqrestore(&priv->lock, flags); | |
415 | /* If we asked for a speed change encode it */ | |
416 | if (baud_rate) | |
417 | tty_encode_baud_rate(tty, | |
418 | new_baudrate, new_baudrate); | |
419 | } | |
420 | break; | |
421 | case CYPRESS_GET_CONFIG: | |
422 | if (priv->get_cfg_unsafe) { | |
423 | /* Not implemented for this device, | |
424 | and if we try to do it we're likely | |
425 | to crash the hardware. */ | |
426 | return -ENOTTY; | |
427 | } | |
428 | dbg("%s - retreiving serial line settings", __func__); | |
429 | /* set initial values in feature buffer */ | |
430 | memset(feature_buffer, 0, sizeof(feature_buffer)); | |
431 | ||
432 | do { | |
433 | retval = usb_control_msg(port->serial->dev, | |
434 | usb_rcvctrlpipe(port->serial->dev, 0), | |
435 | HID_REQ_GET_REPORT, | |
436 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
437 | 0x0300, 0, feature_buffer, | |
438 | sizeof(feature_buffer), 500); | |
439 | ||
440 | if (tries++ >= 3) | |
441 | break; | |
442 | } while (retval != sizeof(feature_buffer) | |
443 | && retval != -ENODEV); | |
444 | ||
445 | if (retval != sizeof(feature_buffer)) { | |
446 | err("%s - failed to retrieve serial line settings - %d", __func__, retval); | |
447 | cypress_set_dead(port); | |
448 | return retval; | |
449 | } else { | |
450 | spin_lock_irqsave(&priv->lock, flags); | |
451 | /* store the config in one byte, and later | |
452 | use bit masks to check values */ | |
453 | priv->current_config = feature_buffer[4]; | |
454 | priv->baud_rate = *((u_int32_t *)feature_buffer); | |
455 | spin_unlock_irqrestore(&priv->lock, flags); | |
456 | } | |
1da177e4 | 457 | } |
3cb4a4f7 LM |
458 | spin_lock_irqsave(&priv->lock, flags); |
459 | ++priv->cmd_count; | |
460 | spin_unlock_irqrestore(&priv->lock, flags); | |
461 | ||
1da177e4 LT |
462 | return retval; |
463 | } /* cypress_serial_control */ | |
464 | ||
465 | ||
78aef519 MI |
466 | static void cypress_set_dead(struct usb_serial_port *port) |
467 | { | |
468 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
469 | unsigned long flags; | |
470 | ||
471 | spin_lock_irqsave(&priv->lock, flags); | |
472 | if (!priv->comm_is_ok) { | |
473 | spin_unlock_irqrestore(&priv->lock, flags); | |
474 | return; | |
475 | } | |
476 | priv->comm_is_ok = 0; | |
477 | spin_unlock_irqrestore(&priv->lock, flags); | |
478 | ||
479 | err("cypress_m8 suspending failing port %d - interval might be too short", | |
480 | port->number); | |
481 | } | |
482 | ||
483 | ||
1da177e4 LT |
484 | /***************************************************************************** |
485 | * Cypress serial driver functions | |
486 | *****************************************************************************/ | |
487 | ||
488 | ||
813a224f | 489 | static int generic_startup(struct usb_serial *serial) |
1da177e4 LT |
490 | { |
491 | struct cypress_private *priv; | |
0257fa9f | 492 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 493 | |
441b62c1 | 494 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 495 | |
813a224f | 496 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
497 | if (!priv) |
498 | return -ENOMEM; | |
499 | ||
78aef519 | 500 | priv->comm_is_ok = !0; |
1da177e4 LT |
501 | spin_lock_init(&priv->lock); |
502 | priv->buf = cypress_buf_alloc(CYPRESS_BUF_SIZE); | |
503 | if (priv->buf == NULL) { | |
504 | kfree(priv); | |
505 | return -ENOMEM; | |
506 | } | |
507 | init_waitqueue_head(&priv->delta_msr_wait); | |
813a224f AC |
508 | |
509 | usb_reset_configuration(serial->dev); | |
510 | ||
1da177e4 LT |
511 | priv->cmd_ctrl = 0; |
512 | priv->line_control = 0; | |
513 | priv->termios_initialized = 0; | |
1da177e4 | 514 | priv->rx_flags = 0; |
3416eaa1 MI |
515 | /* Default packet format setting is determined by packet size. |
516 | Anything with a size larger then 9 must have a separate | |
517 | count field since the 3 bit count field is otherwise too | |
518 | small. Otherwise we can use the slightly more compact | |
519 | format. This is in accordance with the cypress_m8 serial | |
520 | converter app note. */ | |
813a224f | 521 | if (port->interrupt_out_size > 9) |
3416eaa1 | 522 | priv->pkt_fmt = packet_format_1; |
813a224f | 523 | else |
3416eaa1 | 524 | priv->pkt_fmt = packet_format_2; |
813a224f | 525 | |
0257fa9f MI |
526 | if (interval > 0) { |
527 | priv->write_urb_interval = interval; | |
528 | priv->read_urb_interval = interval; | |
529 | dbg("%s - port %d read & write intervals forced to %d", | |
813a224f | 530 | __func__, port->number, interval); |
0257fa9f MI |
531 | } else { |
532 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
533 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
534 | dbg("%s - port %d intervals: read=%d write=%d", | |
813a224f AC |
535 | __func__, port->number, |
536 | priv->read_urb_interval, priv->write_urb_interval); | |
0257fa9f MI |
537 | } |
538 | usb_set_serial_port_data(port, priv); | |
813a224f | 539 | |
b9db07fb LM |
540 | return 0; |
541 | } | |
1da177e4 LT |
542 | |
543 | ||
813a224f | 544 | static int cypress_earthmate_startup(struct usb_serial *serial) |
1da177e4 LT |
545 | { |
546 | struct cypress_private *priv; | |
3d6aa320 | 547 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 548 | |
441b62c1 | 549 | dbg("%s", __func__); |
1da177e4 LT |
550 | |
551 | if (generic_startup(serial)) { | |
441b62c1 | 552 | dbg("%s - Failed setting up port %d", __func__, |
3d6aa320 | 553 | port->number); |
1da177e4 LT |
554 | return 1; |
555 | } | |
556 | ||
3d6aa320 | 557 | priv = usb_get_serial_port_data(port); |
1da177e4 | 558 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
559 | /* All Earthmate devices use the separated-count packet |
560 | format! Idiotic. */ | |
561 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
562 | if (serial->dev->descriptor.idProduct != |
563 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
564 | /* The old original USB Earthmate seemed able to |
565 | handle GET_CONFIG requests; everything they've | |
566 | produced since that time crashes if this command is | |
567 | attempted :-( */ | |
568 | dbg("%s - Marking this device as unsafe for GET_CONFIG " | |
569 | "commands", __func__); | |
570 | priv->get_cfg_unsafe = !0; | |
571 | } | |
b9db07fb LM |
572 | |
573 | return 0; | |
1da177e4 LT |
574 | } /* cypress_earthmate_startup */ |
575 | ||
576 | ||
813a224f | 577 | static int cypress_hidcom_startup(struct usb_serial *serial) |
1da177e4 LT |
578 | { |
579 | struct cypress_private *priv; | |
580 | ||
441b62c1 | 581 | dbg("%s", __func__); |
1da177e4 LT |
582 | |
583 | if (generic_startup(serial)) { | |
441b62c1 | 584 | dbg("%s - Failed setting up port %d", __func__, |
b9db07fb | 585 | serial->port[0]->number); |
1da177e4 LT |
586 | return 1; |
587 | } | |
588 | ||
589 | priv = usb_get_serial_port_data(serial->port[0]); | |
590 | priv->chiptype = CT_CYPHIDCOM; | |
813a224f | 591 | |
b9db07fb | 592 | return 0; |
1da177e4 LT |
593 | } /* cypress_hidcom_startup */ |
594 | ||
595 | ||
813a224f | 596 | static int cypress_ca42v2_startup(struct usb_serial *serial) |
a5c44e29 LM |
597 | { |
598 | struct cypress_private *priv; | |
599 | ||
441b62c1 | 600 | dbg("%s", __func__); |
a5c44e29 LM |
601 | |
602 | if (generic_startup(serial)) { | |
441b62c1 | 603 | dbg("%s - Failed setting up port %d", __func__, |
a5c44e29 LM |
604 | serial->port[0]->number); |
605 | return 1; | |
606 | } | |
607 | ||
608 | priv = usb_get_serial_port_data(serial->port[0]); | |
609 | priv->chiptype = CT_CA42V2; | |
610 | ||
611 | return 0; | |
612 | } /* cypress_ca42v2_startup */ | |
613 | ||
614 | ||
813a224f | 615 | static void cypress_shutdown(struct usb_serial *serial) |
1da177e4 LT |
616 | { |
617 | struct cypress_private *priv; | |
618 | ||
813a224f | 619 | dbg("%s - port %d", __func__, serial->port[0]->number); |
1da177e4 LT |
620 | |
621 | /* all open ports are closed at this point */ | |
622 | ||
623 | priv = usb_get_serial_port_data(serial->port[0]); | |
624 | ||
625 | if (priv) { | |
626 | cypress_buf_free(priv->buf); | |
627 | kfree(priv); | |
628 | usb_set_serial_port_data(serial->port[0], NULL); | |
629 | } | |
630 | } | |
631 | ||
632 | ||
95da310e AC |
633 | static int cypress_open(struct tty_struct *tty, |
634 | struct usb_serial_port *port, struct file *filp) | |
1da177e4 LT |
635 | { |
636 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
637 | struct usb_serial *serial = port->serial; | |
638 | unsigned long flags; | |
639 | int result = 0; | |
640 | ||
441b62c1 | 641 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 642 | |
78aef519 MI |
643 | if (!priv->comm_is_ok) |
644 | return -EIO; | |
645 | ||
1da177e4 | 646 | /* clear halts before open */ |
1da177e4 LT |
647 | usb_clear_halt(serial->dev, 0x81); |
648 | usb_clear_halt(serial->dev, 0x02); | |
649 | ||
650 | spin_lock_irqsave(&priv->lock, flags); | |
651 | /* reset read/write statistics */ | |
652 | priv->bytes_in = 0; | |
653 | priv->bytes_out = 0; | |
654 | priv->cmd_count = 0; | |
655 | priv->rx_flags = 0; | |
656 | spin_unlock_irqrestore(&priv->lock, flags); | |
657 | ||
658 | /* setting to zero could cause data loss */ | |
95da310e AC |
659 | if (tty) |
660 | tty->low_latency = 1; | |
1da177e4 LT |
661 | |
662 | /* raise both lines and set termios */ | |
663 | spin_lock_irqsave(&priv->lock, flags); | |
664 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
1da177e4 LT |
665 | priv->cmd_ctrl = 1; |
666 | spin_unlock_irqrestore(&priv->lock, flags); | |
95da310e | 667 | result = cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
668 | |
669 | if (result) { | |
813a224f AC |
670 | dev_err(&port->dev, |
671 | "%s - failed setting the control lines - error %d\n", | |
672 | __func__, result); | |
1da177e4 LT |
673 | return result; |
674 | } else | |
441b62c1 | 675 | dbg("%s - success setting the control lines", __func__); |
1da177e4 | 676 | |
95da310e AC |
677 | if (tty) |
678 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
679 | |
680 | /* setup the port and start reading from the device */ | |
813a224f | 681 | if (!port->interrupt_in_urb) { |
441b62c1 | 682 | err("%s - interrupt_in_urb is empty!", __func__); |
813a224f | 683 | return -1; |
1da177e4 LT |
684 | } |
685 | ||
686 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
687 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
688 | port->interrupt_in_urb->transfer_buffer, |
689 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 690 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
691 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
692 | ||
813a224f AC |
693 | if (result) { |
694 | dev_err(&port->dev, | |
695 | "%s - failed submitting read urb, error %d\n", | |
696 | __func__, result); | |
78aef519 | 697 | cypress_set_dead(port); |
1da177e4 LT |
698 | } |
699 | ||
700 | return result; | |
701 | } /* cypress_open */ | |
702 | ||
703 | ||
95da310e | 704 | static void cypress_close(struct tty_struct *tty, |
813a224f | 705 | struct usb_serial_port *port, struct file *filp) |
1da177e4 LT |
706 | { |
707 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
708 | unsigned int c_cflag; | |
1da177e4 LT |
709 | int bps; |
710 | long timeout; | |
711 | wait_queue_t wait; | |
712 | ||
441b62c1 | 713 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
714 | |
715 | /* wait for data to drain from buffer */ | |
9e3b1d8e | 716 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
717 | timeout = CYPRESS_CLOSING_WAIT; |
718 | init_waitqueue_entry(&wait, current); | |
95da310e | 719 | add_wait_queue(&tty->write_wait, &wait); |
1da177e4 LT |
720 | for (;;) { |
721 | set_current_state(TASK_INTERRUPTIBLE); | |
722 | if (cypress_buf_data_avail(priv->buf) == 0 | |
723 | || timeout == 0 || signal_pending(current) | |
9e3b1d8e ON |
724 | /* without mutex, allowed due to harmless failure mode */ |
725 | || port->serial->disconnected) | |
1da177e4 | 726 | break; |
9e3b1d8e | 727 | spin_unlock_irq(&priv->lock); |
1da177e4 | 728 | timeout = schedule_timeout(timeout); |
9e3b1d8e | 729 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
730 | } |
731 | set_current_state(TASK_RUNNING); | |
95da310e | 732 | remove_wait_queue(&tty->write_wait, &wait); |
1da177e4 LT |
733 | /* clear out any remaining data in the buffer */ |
734 | cypress_buf_clear(priv->buf); | |
9e3b1d8e ON |
735 | spin_unlock_irq(&priv->lock); |
736 | ||
737 | /* writing is potentially harmful, lock must be taken */ | |
738 | mutex_lock(&port->serial->disc_mutex); | |
739 | if (port->serial->disconnected) { | |
740 | mutex_unlock(&port->serial->disc_mutex); | |
741 | return; | |
742 | } | |
1da177e4 | 743 | /* wait for characters to drain from device */ |
95da310e AC |
744 | if (tty) { |
745 | bps = tty_get_baud_rate(tty); | |
746 | if (bps > 1200) | |
813a224f | 747 | timeout = max((HZ * 2560) / bps, HZ / 10); |
95da310e | 748 | else |
813a224f | 749 | timeout = 2 * HZ; |
95da310e AC |
750 | schedule_timeout_interruptible(timeout); |
751 | } | |
1da177e4 | 752 | |
441b62c1 | 753 | dbg("%s - stopping urbs", __func__); |
813a224f AC |
754 | usb_kill_urb(port->interrupt_in_urb); |
755 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 756 | |
95da310e AC |
757 | if (tty) { |
758 | c_cflag = tty->termios->c_cflag; | |
1da177e4 LT |
759 | if (c_cflag & HUPCL) { |
760 | /* drop dtr and rts */ | |
761 | priv = usb_get_serial_port_data(port); | |
9e3b1d8e | 762 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
763 | priv->line_control = 0; |
764 | priv->cmd_ctrl = 1; | |
9e3b1d8e | 765 | spin_unlock_irq(&priv->lock); |
95da310e | 766 | cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
767 | } |
768 | } | |
769 | ||
770 | if (stats) | |
813a224f AC |
771 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
772 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
9e3b1d8e | 773 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
774 | } /* cypress_close */ |
775 | ||
776 | ||
95da310e AC |
777 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
778 | const unsigned char *buf, int count) | |
1da177e4 LT |
779 | { |
780 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
781 | unsigned long flags; | |
813a224f | 782 | |
441b62c1 | 783 | dbg("%s - port %d, %d bytes", __func__, port->number, count); |
1da177e4 LT |
784 | |
785 | /* line control commands, which need to be executed immediately, | |
786 | are not put into the buffer for obvious reasons. | |
787 | */ | |
788 | if (priv->cmd_ctrl) { | |
789 | count = 0; | |
790 | goto finish; | |
791 | } | |
813a224f | 792 | |
1da177e4 LT |
793 | if (!count) |
794 | return count; | |
813a224f | 795 | |
1da177e4 LT |
796 | spin_lock_irqsave(&priv->lock, flags); |
797 | count = cypress_buf_put(priv->buf, buf, count); | |
798 | spin_unlock_irqrestore(&priv->lock, flags); | |
799 | ||
800 | finish: | |
801 | cypress_send(port); | |
802 | ||
803 | return count; | |
804 | } /* cypress_write */ | |
805 | ||
806 | ||
807 | static void cypress_send(struct usb_serial_port *port) | |
808 | { | |
809 | int count = 0, result, offset, actual_size; | |
810 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
811 | unsigned long flags; | |
813a224f | 812 | |
78aef519 MI |
813 | if (!priv->comm_is_ok) |
814 | return; | |
815 | ||
441b62c1 | 816 | dbg("%s - port %d", __func__, port->number); |
813a224f AC |
817 | dbg("%s - interrupt out size is %d", __func__, |
818 | port->interrupt_out_size); | |
819 | ||
1da177e4 LT |
820 | spin_lock_irqsave(&priv->lock, flags); |
821 | if (priv->write_urb_in_use) { | |
441b62c1 | 822 | dbg("%s - can't write, urb in use", __func__); |
1da177e4 LT |
823 | spin_unlock_irqrestore(&priv->lock, flags); |
824 | return; | |
825 | } | |
826 | spin_unlock_irqrestore(&priv->lock, flags); | |
827 | ||
828 | /* clear buffer */ | |
813a224f AC |
829 | memset(port->interrupt_out_urb->transfer_buffer, 0, |
830 | port->interrupt_out_size); | |
1da177e4 LT |
831 | |
832 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
833 | switch (priv->pkt_fmt) { |
834 | default: | |
835 | case packet_format_1: | |
836 | /* this is for the CY7C64013... */ | |
837 | offset = 2; | |
838 | port->interrupt_out_buffer[0] = priv->line_control; | |
839 | break; | |
840 | case packet_format_2: | |
841 | /* this is for the CY7C63743... */ | |
842 | offset = 1; | |
843 | port->interrupt_out_buffer[0] = priv->line_control; | |
844 | break; | |
1da177e4 LT |
845 | } |
846 | ||
847 | if (priv->line_control & CONTROL_RESET) | |
848 | priv->line_control &= ~CONTROL_RESET; | |
849 | ||
850 | if (priv->cmd_ctrl) { | |
851 | priv->cmd_count++; | |
441b62c1 | 852 | dbg("%s - line control command being issued", __func__); |
1da177e4 LT |
853 | spin_unlock_irqrestore(&priv->lock, flags); |
854 | goto send; | |
855 | } else | |
856 | spin_unlock_irqrestore(&priv->lock, flags); | |
857 | ||
858 | count = cypress_buf_get(priv->buf, &port->interrupt_out_buffer[offset], | |
859 | port->interrupt_out_size-offset); | |
860 | ||
813a224f | 861 | if (count == 0) |
1da177e4 | 862 | return; |
1da177e4 | 863 | |
3416eaa1 MI |
864 | switch (priv->pkt_fmt) { |
865 | default: | |
866 | case packet_format_1: | |
867 | port->interrupt_out_buffer[1] = count; | |
868 | break; | |
869 | case packet_format_2: | |
870 | port->interrupt_out_buffer[0] |= count; | |
1da177e4 LT |
871 | } |
872 | ||
441b62c1 | 873 | dbg("%s - count is %d", __func__, count); |
1da177e4 LT |
874 | |
875 | send: | |
876 | spin_lock_irqsave(&priv->lock, flags); | |
877 | priv->write_urb_in_use = 1; | |
878 | spin_unlock_irqrestore(&priv->lock, flags); | |
879 | ||
880 | if (priv->cmd_ctrl) | |
881 | actual_size = 1; | |
882 | else | |
3416eaa1 MI |
883 | actual_size = count + |
884 | (priv->pkt_fmt == packet_format_1 ? 2 : 1); | |
885 | ||
813a224f AC |
886 | usb_serial_debug_data(debug, &port->dev, __func__, |
887 | port->interrupt_out_size, | |
888 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 889 | |
9aa8dae7 MI |
890 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
891 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
892 | port->interrupt_out_buffer, port->interrupt_out_size, | |
893 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 894 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 895 | if (result) { |
813a224f AC |
896 | dev_err(&port->dev, |
897 | "%s - failed submitting write urb, error %d\n", | |
898 | __func__, result); | |
1da177e4 | 899 | priv->write_urb_in_use = 0; |
78aef519 | 900 | cypress_set_dead(port); |
1da177e4 LT |
901 | } |
902 | ||
903 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 904 | if (priv->cmd_ctrl) |
1da177e4 | 905 | priv->cmd_ctrl = 0; |
813a224f AC |
906 | |
907 | /* do not count the line control and size bytes */ | |
908 | priv->bytes_out += count; | |
1da177e4 LT |
909 | spin_unlock_irqrestore(&priv->lock, flags); |
910 | ||
cf2c7481 | 911 | usb_serial_port_softint(port); |
1da177e4 LT |
912 | } /* cypress_send */ |
913 | ||
914 | ||
915 | /* returns how much space is available in the soft buffer */ | |
95da310e | 916 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 917 | { |
95da310e | 918 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
919 | struct cypress_private *priv = usb_get_serial_port_data(port); |
920 | int room = 0; | |
921 | unsigned long flags; | |
922 | ||
441b62c1 | 923 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
924 | |
925 | spin_lock_irqsave(&priv->lock, flags); | |
926 | room = cypress_buf_space_avail(priv->buf); | |
927 | spin_unlock_irqrestore(&priv->lock, flags); | |
928 | ||
441b62c1 | 929 | dbg("%s - returns %d", __func__, room); |
1da177e4 LT |
930 | return room; |
931 | } | |
932 | ||
933 | ||
95da310e | 934 | static int cypress_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 935 | { |
95da310e | 936 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
937 | struct cypress_private *priv = usb_get_serial_port_data(port); |
938 | __u8 status, control; | |
939 | unsigned int result = 0; | |
940 | unsigned long flags; | |
813a224f | 941 | |
441b62c1 | 942 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
943 | |
944 | spin_lock_irqsave(&priv->lock, flags); | |
945 | control = priv->line_control; | |
946 | status = priv->current_status; | |
947 | spin_unlock_irqrestore(&priv->lock, flags); | |
948 | ||
949 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
950 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
951 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
952 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
953 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
954 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
955 | ||
441b62c1 | 956 | dbg("%s - result = %x", __func__, result); |
1da177e4 LT |
957 | |
958 | return result; | |
959 | } | |
960 | ||
961 | ||
95da310e | 962 | static int cypress_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
963 | unsigned int set, unsigned int clear) |
964 | { | |
95da310e | 965 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
966 | struct cypress_private *priv = usb_get_serial_port_data(port); |
967 | unsigned long flags; | |
813a224f | 968 | |
441b62c1 | 969 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
970 | |
971 | spin_lock_irqsave(&priv->lock, flags); | |
972 | if (set & TIOCM_RTS) | |
973 | priv->line_control |= CONTROL_RTS; | |
974 | if (set & TIOCM_DTR) | |
975 | priv->line_control |= CONTROL_DTR; | |
976 | if (clear & TIOCM_RTS) | |
977 | priv->line_control &= ~CONTROL_RTS; | |
978 | if (clear & TIOCM_DTR) | |
979 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 980 | priv->cmd_ctrl = 1; |
1da177e4 LT |
981 | spin_unlock_irqrestore(&priv->lock, flags); |
982 | ||
95da310e | 983 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
984 | } |
985 | ||
986 | ||
813a224f | 987 | static int cypress_ioctl(struct tty_struct *tty, struct file *file, |
95da310e | 988 | unsigned int cmd, unsigned long arg) |
1da177e4 | 989 | { |
95da310e | 990 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
991 | struct cypress_private *priv = usb_get_serial_port_data(port); |
992 | ||
441b62c1 | 993 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 LT |
994 | |
995 | switch (cmd) { | |
813a224f AC |
996 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ |
997 | case TIOCMIWAIT: | |
998 | while (priv != NULL) { | |
999 | interruptible_sleep_on(&priv->delta_msr_wait); | |
1000 | /* see if a signal did it */ | |
1001 | if (signal_pending(current)) | |
1002 | return -ERESTARTSYS; | |
1003 | else { | |
1004 | char diff = priv->diff_status; | |
1005 | if (diff == 0) | |
1006 | return -EIO; /* no change => error */ | |
1007 | ||
1008 | /* consume all events */ | |
1009 | priv->diff_status = 0; | |
1010 | ||
1011 | /* return 0 if caller wanted to know about | |
1012 | these bits */ | |
1013 | if (((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
1014 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
1015 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
1016 | ((arg & TIOCM_CTS) && (diff & UART_CTS))) | |
1017 | return 0; | |
1018 | /* otherwise caller can't care less about what | |
1019 | * happened, and so we continue to wait for | |
1020 | * more events. | |
1021 | */ | |
1da177e4 | 1022 | } |
813a224f AC |
1023 | } |
1024 | return 0; | |
1025 | default: | |
1026 | break; | |
1da177e4 | 1027 | } |
441b62c1 | 1028 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __func__, cmd); |
1da177e4 LT |
1029 | return -ENOIOCTLCMD; |
1030 | } /* cypress_ioctl */ | |
1031 | ||
1032 | ||
95da310e AC |
1033 | static void cypress_set_termios(struct tty_struct *tty, |
1034 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
1035 | { |
1036 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1da177e4 | 1037 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 1038 | unsigned cflag, iflag; |
1da177e4 LT |
1039 | unsigned long flags; |
1040 | __u8 oldlines; | |
3cb4a4f7 | 1041 | int linechange = 0; |
b9db07fb | 1042 | |
441b62c1 | 1043 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1044 | |
1da177e4 LT |
1045 | spin_lock_irqsave(&priv->lock, flags); |
1046 | if (!priv->termios_initialized) { | |
1047 | if (priv->chiptype == CT_EARTHMATE) { | |
1048 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
1049 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
1050 | CLOCAL; | |
8873aaa6 AC |
1051 | tty->termios->c_ispeed = 4800; |
1052 | tty->termios->c_ospeed = 4800; | |
1da177e4 LT |
1053 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
1054 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
1055 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
1056 | CLOCAL; | |
8873aaa6 AC |
1057 | tty->termios->c_ispeed = 9600; |
1058 | tty->termios->c_ospeed = 9600; | |
a5c44e29 LM |
1059 | } else if (priv->chiptype == CT_CA42V2) { |
1060 | *(tty->termios) = tty_std_termios; | |
1061 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1062 | CLOCAL; | |
8873aaa6 AC |
1063 | tty->termios->c_ispeed = 9600; |
1064 | tty->termios->c_ospeed = 9600; | |
1da177e4 LT |
1065 | } |
1066 | priv->termios_initialized = 1; | |
1067 | } | |
1068 | spin_unlock_irqrestore(&priv->lock, flags); | |
1069 | ||
8873aaa6 AC |
1070 | /* Unsupported features need clearing */ |
1071 | tty->termios->c_cflag &= ~(CMSPAR|CRTSCTS); | |
1072 | ||
1da177e4 LT |
1073 | cflag = tty->termios->c_cflag; |
1074 | iflag = tty->termios->c_iflag; | |
1075 | ||
1076 | /* check if there are new settings */ | |
1077 | if (old_termios) { | |
8873aaa6 AC |
1078 | spin_lock_irqsave(&priv->lock, flags); |
1079 | priv->tmp_termios = *(tty->termios); | |
1080 | spin_unlock_irqrestore(&priv->lock, flags); | |
1081 | } | |
1da177e4 LT |
1082 | |
1083 | /* set number of data bits, parity, stop bits */ | |
1084 | /* when parity is disabled the parity type bit is ignored */ | |
1085 | ||
b9db07fb LM |
1086 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
1087 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
1088 | ||
1da177e4 LT |
1089 | if (cflag & PARENB) { |
1090 | parity_enable = 1; | |
b9db07fb LM |
1091 | /* 1 means odd parity, 0 means even parity */ |
1092 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
1093 | } else |
1094 | parity_enable = parity_type = 0; | |
1095 | ||
77336828 AC |
1096 | switch (cflag & CSIZE) { |
1097 | case CS5: | |
1098 | data_bits = 0; | |
1099 | break; | |
1100 | case CS6: | |
1101 | data_bits = 1; | |
1102 | break; | |
1103 | case CS7: | |
1104 | data_bits = 2; | |
1105 | break; | |
1106 | case CS8: | |
1da177e4 | 1107 | data_bits = 3; |
77336828 AC |
1108 | break; |
1109 | default: | |
1110 | err("%s - CSIZE was set, but not CS5-CS8", | |
1111 | __func__); | |
1112 | data_bits = 3; | |
1113 | } | |
1da177e4 LT |
1114 | spin_lock_irqsave(&priv->lock, flags); |
1115 | oldlines = priv->line_control; | |
1116 | if ((cflag & CBAUD) == B0) { | |
1117 | /* drop dtr and rts */ | |
441b62c1 | 1118 | dbg("%s - dropping the lines, baud rate 0bps", __func__); |
1da177e4 | 1119 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 1120 | } else |
3cb4a4f7 | 1121 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 1122 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1123 | |
b9db07fb | 1124 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, " |
441b62c1 | 1125 | "%d data_bits (+5)", __func__, stop_bits, |
b9db07fb LM |
1126 | parity_enable, parity_type, data_bits); |
1127 | ||
813a224f AC |
1128 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
1129 | data_bits, stop_bits, | |
1130 | parity_enable, parity_type, | |
1131 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1132 | |
b9db07fb LM |
1133 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1134 | * filled into the private structure this should confirm that all is | |
1135 | * working if it returns what we just set */ | |
95da310e | 1136 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 1137 | |
b9db07fb LM |
1138 | /* Here we can define custom tty settings for devices; the main tty |
1139 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1140 | |
b9db07fb | 1141 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 1142 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
b9db07fb LM |
1143 | dbg("Using custom termios settings for a baud rate of " |
1144 | "4800bps."); | |
1da177e4 LT |
1145 | /* define custom termios settings for NMEA protocol */ |
1146 | ||
1da177e4 | 1147 | tty->termios->c_iflag /* input modes - */ |
b9db07fb LM |
1148 | &= ~(IGNBRK /* disable ignore break */ |
1149 | | BRKINT /* disable break causes interrupt */ | |
1150 | | PARMRK /* disable mark parity errors */ | |
1151 | | ISTRIP /* disable clear high bit of input char */ | |
1152 | | INLCR /* disable translate NL to CR */ | |
1153 | | IGNCR /* disable ignore CR */ | |
1154 | | ICRNL /* disable translate CR to NL */ | |
1155 | | IXON); /* disable enable XON/XOFF flow control */ | |
1156 | ||
1da177e4 | 1157 | tty->termios->c_oflag /* output modes */ |
b9db07fb | 1158 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1159 | |
b9db07fb LM |
1160 | tty->termios->c_lflag /* line discipline modes */ |
1161 | &= ~(ECHO /* disable echo input characters */ | |
1162 | | ECHONL /* disable echo new line */ | |
1163 | | ICANON /* disable erase, kill, werase, and rprnt | |
1164 | special characters */ | |
1165 | | ISIG /* disable interrupt, quit, and suspend | |
1166 | special characters */ | |
1167 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1168 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1169 | |
1da177e4 LT |
1170 | linechange = (priv->line_control != oldlines); |
1171 | spin_unlock_irqrestore(&priv->lock, flags); | |
1172 | ||
1173 | /* if necessary, set lines */ | |
3cb4a4f7 | 1174 | if (linechange) { |
1da177e4 | 1175 | priv->cmd_ctrl = 1; |
95da310e | 1176 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1177 | } |
1da177e4 LT |
1178 | } /* cypress_set_termios */ |
1179 | ||
b9db07fb | 1180 | |
1da177e4 | 1181 | /* returns amount of data still left in soft buffer */ |
95da310e | 1182 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1183 | { |
95da310e | 1184 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1185 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1186 | int chars = 0; | |
1187 | unsigned long flags; | |
1188 | ||
441b62c1 | 1189 | dbg("%s - port %d", __func__, port->number); |
813a224f | 1190 | |
1da177e4 LT |
1191 | spin_lock_irqsave(&priv->lock, flags); |
1192 | chars = cypress_buf_data_avail(priv->buf); | |
1193 | spin_unlock_irqrestore(&priv->lock, flags); | |
1194 | ||
441b62c1 | 1195 | dbg("%s - returns %d", __func__, chars); |
1da177e4 LT |
1196 | return chars; |
1197 | } | |
1198 | ||
1199 | ||
95da310e | 1200 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1201 | { |
95da310e | 1202 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1203 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1204 | unsigned long flags; | |
1205 | ||
441b62c1 | 1206 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1207 | |
1208 | spin_lock_irqsave(&priv->lock, flags); | |
1209 | priv->rx_flags = THROTTLED; | |
b9db07fb | 1210 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1211 | } |
1212 | ||
1213 | ||
95da310e | 1214 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1215 | { |
95da310e | 1216 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1217 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1218 | int actually_throttled, result; | |
1219 | unsigned long flags; | |
1220 | ||
441b62c1 | 1221 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1222 | |
1223 | spin_lock_irqsave(&priv->lock, flags); | |
1224 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; | |
1225 | priv->rx_flags = 0; | |
1226 | spin_unlock_irqrestore(&priv->lock, flags); | |
1227 | ||
78aef519 MI |
1228 | if (!priv->comm_is_ok) |
1229 | return; | |
1230 | ||
1da177e4 LT |
1231 | if (actually_throttled) { |
1232 | port->interrupt_in_urb->dev = port->serial->dev; | |
1233 | ||
1234 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); | |
78aef519 | 1235 | if (result) { |
b9db07fb | 1236 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1237 | "error %d\n", __func__, result); |
78aef519 MI |
1238 | cypress_set_dead(port); |
1239 | } | |
1da177e4 LT |
1240 | } |
1241 | } | |
1242 | ||
1243 | ||
7d12e780 | 1244 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1245 | { |
cdc97792 | 1246 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1247 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1248 | struct tty_struct *tty; | |
1249 | unsigned char *data = urb->transfer_buffer; | |
1250 | unsigned long flags; | |
b9db07fb | 1251 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1252 | int havedata = 0; |
1253 | int bytes = 0; | |
1254 | int result; | |
1255 | int i = 0; | |
8d7bc55e | 1256 | int status = urb->status; |
1da177e4 | 1257 | |
441b62c1 | 1258 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1259 | |
8d7bc55e | 1260 | switch (status) { |
78aef519 MI |
1261 | case 0: /* success */ |
1262 | break; | |
1263 | case -ECONNRESET: | |
1264 | case -ENOENT: | |
1265 | case -ESHUTDOWN: | |
1266 | /* precursor to disconnect so just go away */ | |
1267 | return; | |
1268 | case -EPIPE: | |
813a224f | 1269 | usb_clear_halt(port->serial->dev, 0x81); |
78aef519 MI |
1270 | break; |
1271 | default: | |
1272 | /* something ugly is going on... */ | |
813a224f AC |
1273 | dev_err(&urb->dev->dev, |
1274 | "%s - unexpected nonzero read status received: %d\n", | |
1275 | __func__, status); | |
78aef519 | 1276 | cypress_set_dead(port); |
1da177e4 LT |
1277 | return; |
1278 | } | |
1279 | ||
1280 | spin_lock_irqsave(&priv->lock, flags); | |
1281 | if (priv->rx_flags & THROTTLED) { | |
441b62c1 | 1282 | dbg("%s - now throttling", __func__); |
1da177e4 LT |
1283 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1284 | spin_unlock_irqrestore(&priv->lock, flags); | |
1285 | return; | |
1286 | } | |
1287 | spin_unlock_irqrestore(&priv->lock, flags); | |
1288 | ||
4a90f09b | 1289 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1290 | if (!tty) { |
441b62c1 | 1291 | dbg("%s - bad tty pointer - exiting", __func__); |
1da177e4 LT |
1292 | return; |
1293 | } | |
1294 | ||
1295 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1296 | result = urb->actual_length; |
1297 | switch (priv->pkt_fmt) { | |
1298 | default: | |
1299 | case packet_format_1: | |
1300 | /* This is for the CY7C64013... */ | |
1301 | priv->current_status = data[0] & 0xF8; | |
1302 | bytes = data[1] + 2; | |
1303 | i = 2; | |
1304 | if (bytes > 2) | |
1305 | havedata = 1; | |
1306 | break; | |
1307 | case packet_format_2: | |
1308 | /* This is for the CY7C63743... */ | |
1309 | priv->current_status = data[0] & 0xF8; | |
1310 | bytes = (data[0] & 0x07) + 1; | |
1311 | i = 1; | |
1312 | if (bytes > 1) | |
1313 | havedata = 1; | |
1314 | break; | |
1da177e4 LT |
1315 | } |
1316 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 MI |
1317 | if (result < bytes) { |
1318 | dbg("%s - wrong packet size - received %d bytes but packet " | |
1319 | "said %d bytes", __func__, result, bytes); | |
1320 | goto continue_read; | |
1321 | } | |
1da177e4 | 1322 | |
813a224f AC |
1323 | usb_serial_debug_data(debug, &port->dev, __func__, |
1324 | urb->actual_length, data); | |
1da177e4 LT |
1325 | |
1326 | spin_lock_irqsave(&priv->lock, flags); | |
1327 | /* check to see if status has changed */ | |
6768306c MI |
1328 | if (priv->current_status != priv->prev_status) { |
1329 | priv->diff_status |= priv->current_status ^ | |
1330 | priv->prev_status; | |
1331 | wake_up_interruptible(&priv->delta_msr_wait); | |
1332 | priv->prev_status = priv->current_status; | |
1da177e4 | 1333 | } |
b9db07fb | 1334 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1335 | |
b9db07fb LM |
1336 | /* hangup, as defined in acm.c... this might be a bad place for it |
1337 | * though */ | |
1338 | if (tty && !(tty->termios->c_cflag & CLOCAL) && | |
1339 | !(priv->current_status & UART_CD)) { | |
441b62c1 | 1340 | dbg("%s - calling hangup", __func__); |
1da177e4 LT |
1341 | tty_hangup(tty); |
1342 | goto continue_read; | |
1343 | } | |
1344 | ||
b9db07fb LM |
1345 | /* There is one error bit... I'm assuming it is a parity error |
1346 | * indicator as the generic firmware will set this bit to 1 if a | |
1347 | * parity error occurs. | |
1348 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1349 | spin_lock_irqsave(&priv->lock, flags); |
1350 | if (priv->current_status & CYP_ERROR) { | |
1351 | spin_unlock_irqrestore(&priv->lock, flags); | |
1352 | tty_flag = TTY_PARITY; | |
441b62c1 | 1353 | dbg("%s - Parity Error detected", __func__); |
1da177e4 LT |
1354 | } else |
1355 | spin_unlock_irqrestore(&priv->lock, flags); | |
1356 | ||
1357 | /* process read if there is data other than line status */ | |
1358 | if (tty && (bytes > i)) { | |
33f0f88f | 1359 | bytes = tty_buffer_request_room(tty, bytes); |
1da177e4 | 1360 | for (; i < bytes ; ++i) { |
b9db07fb LM |
1361 | dbg("pushing byte number %d - %d - %c", i, data[i], |
1362 | data[i]); | |
1da177e4 LT |
1363 | tty_insert_flip_char(tty, data[i], tty_flag); |
1364 | } | |
4a90f09b | 1365 | tty_flip_buffer_push(tty); |
1da177e4 LT |
1366 | } |
1367 | ||
1368 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1369 | /* control and status byte(s) are also counted */ |
1370 | priv->bytes_in += bytes; | |
1da177e4 LT |
1371 | spin_unlock_irqrestore(&priv->lock, flags); |
1372 | ||
1373 | continue_read: | |
4a90f09b | 1374 | tty_kref_put(tty); |
b9db07fb LM |
1375 | |
1376 | /* Continue trying to always read... unless the port has closed. */ | |
1da177e4 | 1377 | |
95da310e | 1378 | if (port->port.count > 0 && priv->comm_is_ok) { |
b9db07fb LM |
1379 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1380 | usb_rcvintpipe(port->serial->dev, | |
1381 | port->interrupt_in_endpointAddress), | |
1382 | port->interrupt_in_urb->transfer_buffer, | |
1383 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1384 | cypress_read_int_callback, port, |
1385 | priv->read_urb_interval); | |
b9db07fb | 1386 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
78aef519 | 1387 | if (result) { |
b9db07fb | 1388 | dev_err(&urb->dev->dev, "%s - failed resubmitting " |
441b62c1 | 1389 | "read urb, error %d\n", __func__, |
b9db07fb | 1390 | result); |
78aef519 MI |
1391 | cypress_set_dead(port); |
1392 | } | |
1da177e4 | 1393 | } |
b9db07fb | 1394 | |
1da177e4 LT |
1395 | return; |
1396 | } /* cypress_read_int_callback */ | |
1397 | ||
1398 | ||
7d12e780 | 1399 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1400 | { |
cdc97792 | 1401 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1402 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1403 | int result; | |
8d7bc55e | 1404 | int status = urb->status; |
1da177e4 | 1405 | |
441b62c1 | 1406 | dbg("%s - port %d", __func__, port->number); |
8d7bc55e GKH |
1407 | |
1408 | switch (status) { | |
813a224f AC |
1409 | case 0: |
1410 | /* success */ | |
1411 | break; | |
1412 | case -ECONNRESET: | |
1413 | case -ENOENT: | |
1414 | case -ESHUTDOWN: | |
1415 | /* this urb is terminated, clean up */ | |
1416 | dbg("%s - urb shutting down with status: %d", | |
1417 | __func__, status); | |
1418 | priv->write_urb_in_use = 0; | |
1419 | return; | |
1420 | case -EPIPE: /* no break needed; clear halt and resubmit */ | |
1421 | if (!priv->comm_is_ok) | |
1da177e4 | 1422 | break; |
813a224f AC |
1423 | usb_clear_halt(port->serial->dev, 0x02); |
1424 | /* error in the urb, so we have to resubmit it */ | |
1425 | dbg("%s - nonzero write bulk status received: %d", | |
1426 | __func__, status); | |
1427 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
1428 | port->interrupt_out_urb->dev = port->serial->dev; | |
1429 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); | |
1430 | if (!result) | |
1da177e4 | 1431 | return; |
813a224f AC |
1432 | dev_err(&urb->dev->dev, |
1433 | "%s - failed resubmitting write urb, error %d\n", | |
1434 | __func__, result); | |
1435 | cypress_set_dead(port); | |
1436 | break; | |
1437 | default: | |
1438 | dev_err(&urb->dev->dev, | |
1439 | "%s - unexpected nonzero write status received: %d\n", | |
1440 | __func__, status); | |
1441 | cypress_set_dead(port); | |
1442 | break; | |
1da177e4 | 1443 | } |
1da177e4 | 1444 | priv->write_urb_in_use = 0; |
813a224f | 1445 | |
1da177e4 LT |
1446 | /* send any buffered data */ |
1447 | cypress_send(port); | |
1448 | } | |
1449 | ||
1450 | ||
1451 | /***************************************************************************** | |
1452 | * Write buffer functions - buffering code from pl2303 used | |
1453 | *****************************************************************************/ | |
1454 | ||
1455 | /* | |
1456 | * cypress_buf_alloc | |
1457 | * | |
1458 | * Allocate a circular buffer and all associated memory. | |
1459 | */ | |
1460 | ||
1461 | static struct cypress_buf *cypress_buf_alloc(unsigned int size) | |
1462 | { | |
1463 | ||
1464 | struct cypress_buf *cb; | |
1465 | ||
1466 | ||
1467 | if (size == 0) | |
1468 | return NULL; | |
1469 | ||
5cbded58 | 1470 | cb = kmalloc(sizeof(struct cypress_buf), GFP_KERNEL); |
1da177e4 LT |
1471 | if (cb == NULL) |
1472 | return NULL; | |
1473 | ||
1474 | cb->buf_buf = kmalloc(size, GFP_KERNEL); | |
1475 | if (cb->buf_buf == NULL) { | |
1476 | kfree(cb); | |
1477 | return NULL; | |
1478 | } | |
1479 | ||
1480 | cb->buf_size = size; | |
1481 | cb->buf_get = cb->buf_put = cb->buf_buf; | |
1482 | ||
1483 | return cb; | |
1484 | ||
1485 | } | |
1486 | ||
1487 | ||
1488 | /* | |
1489 | * cypress_buf_free | |
1490 | * | |
1491 | * Free the buffer and all associated memory. | |
1492 | */ | |
1493 | ||
1494 | static void cypress_buf_free(struct cypress_buf *cb) | |
1495 | { | |
1bc3c9e1 JJ |
1496 | if (cb) { |
1497 | kfree(cb->buf_buf); | |
1da177e4 LT |
1498 | kfree(cb); |
1499 | } | |
1500 | } | |
1501 | ||
1502 | ||
1503 | /* | |
1504 | * cypress_buf_clear | |
1505 | * | |
1506 | * Clear out all data in the circular buffer. | |
1507 | */ | |
1508 | ||
1509 | static void cypress_buf_clear(struct cypress_buf *cb) | |
1510 | { | |
1511 | if (cb != NULL) | |
1512 | cb->buf_get = cb->buf_put; | |
1513 | /* equivalent to a get of all data available */ | |
1514 | } | |
1515 | ||
1516 | ||
1517 | /* | |
1518 | * cypress_buf_data_avail | |
1519 | * | |
1520 | * Return the number of bytes of data available in the circular | |
1521 | * buffer. | |
1522 | */ | |
1523 | ||
1524 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb) | |
1525 | { | |
1526 | if (cb != NULL) | |
813a224f AC |
1527 | return (cb->buf_size + cb->buf_put - cb->buf_get) |
1528 | % cb->buf_size; | |
1da177e4 LT |
1529 | else |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | ||
1534 | /* | |
1535 | * cypress_buf_space_avail | |
1536 | * | |
1537 | * Return the number of bytes of space available in the circular | |
1538 | * buffer. | |
1539 | */ | |
1540 | ||
1541 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb) | |
1542 | { | |
1543 | if (cb != NULL) | |
813a224f AC |
1544 | return (cb->buf_size + cb->buf_get - cb->buf_put - 1) |
1545 | % cb->buf_size; | |
1da177e4 LT |
1546 | else |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | ||
1551 | /* | |
1552 | * cypress_buf_put | |
1553 | * | |
1554 | * Copy data data from a user buffer and put it into the circular buffer. | |
1555 | * Restrict to the amount of space available. | |
1556 | * | |
1557 | * Return the number of bytes copied. | |
1558 | */ | |
1559 | ||
1560 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, | |
1561 | unsigned int count) | |
1562 | { | |
1563 | ||
1564 | unsigned int len; | |
1565 | ||
1566 | ||
1567 | if (cb == NULL) | |
1568 | return 0; | |
1569 | ||
1570 | len = cypress_buf_space_avail(cb); | |
1571 | if (count > len) | |
1572 | count = len; | |
1573 | ||
1574 | if (count == 0) | |
1575 | return 0; | |
1576 | ||
1577 | len = cb->buf_buf + cb->buf_size - cb->buf_put; | |
1578 | if (count > len) { | |
1579 | memcpy(cb->buf_put, buf, len); | |
1580 | memcpy(cb->buf_buf, buf+len, count - len); | |
1581 | cb->buf_put = cb->buf_buf + count - len; | |
1582 | } else { | |
1583 | memcpy(cb->buf_put, buf, count); | |
1584 | if (count < len) | |
1585 | cb->buf_put += count; | |
1586 | else /* count == len */ | |
1587 | cb->buf_put = cb->buf_buf; | |
1588 | } | |
1589 | ||
1590 | return count; | |
1591 | ||
1592 | } | |
1593 | ||
1594 | ||
1595 | /* | |
1596 | * cypress_buf_get | |
1597 | * | |
1598 | * Get data from the circular buffer and copy to the given buffer. | |
1599 | * Restrict to the amount of data available. | |
1600 | * | |
1601 | * Return the number of bytes copied. | |
1602 | */ | |
1603 | ||
1604 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, | |
1605 | unsigned int count) | |
1606 | { | |
1607 | ||
1608 | unsigned int len; | |
1609 | ||
1610 | ||
1611 | if (cb == NULL) | |
1612 | return 0; | |
1613 | ||
1614 | len = cypress_buf_data_avail(cb); | |
1615 | if (count > len) | |
1616 | count = len; | |
1617 | ||
1618 | if (count == 0) | |
1619 | return 0; | |
1620 | ||
1621 | len = cb->buf_buf + cb->buf_size - cb->buf_get; | |
1622 | if (count > len) { | |
1623 | memcpy(buf, cb->buf_get, len); | |
1624 | memcpy(buf+len, cb->buf_buf, count - len); | |
1625 | cb->buf_get = cb->buf_buf + count - len; | |
1626 | } else { | |
1627 | memcpy(buf, cb->buf_get, count); | |
1628 | if (count < len) | |
1629 | cb->buf_get += count; | |
1630 | else /* count == len */ | |
1631 | cb->buf_get = cb->buf_buf; | |
1632 | } | |
1633 | ||
1634 | return count; | |
1635 | ||
1636 | } | |
1637 | ||
1638 | /***************************************************************************** | |
1639 | * Module functions | |
1640 | *****************************************************************************/ | |
1641 | ||
1642 | static int __init cypress_init(void) | |
1643 | { | |
1644 | int retval; | |
813a224f | 1645 | |
441b62c1 | 1646 | dbg("%s", __func__); |
813a224f | 1647 | |
1da177e4 LT |
1648 | retval = usb_serial_register(&cypress_earthmate_device); |
1649 | if (retval) | |
1650 | goto failed_em_register; | |
1651 | retval = usb_serial_register(&cypress_hidcom_device); | |
1652 | if (retval) | |
1653 | goto failed_hidcom_register; | |
a5c44e29 LM |
1654 | retval = usb_serial_register(&cypress_ca42v2_device); |
1655 | if (retval) | |
1656 | goto failed_ca42v2_register; | |
1da177e4 LT |
1657 | retval = usb_register(&cypress_driver); |
1658 | if (retval) | |
1659 | goto failed_usb_register; | |
1660 | ||
1661 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1662 | return 0; | |
2e46b748 | 1663 | |
1da177e4 | 1664 | failed_usb_register: |
a5c44e29 | 1665 | usb_serial_deregister(&cypress_ca42v2_device); |
2e46b748 | 1666 | failed_ca42v2_register: |
1da177e4 | 1667 | usb_serial_deregister(&cypress_hidcom_device); |
2e46b748 | 1668 | failed_hidcom_register: |
1da177e4 | 1669 | usb_serial_deregister(&cypress_earthmate_device); |
2e46b748 | 1670 | failed_em_register: |
1da177e4 LT |
1671 | return retval; |
1672 | } | |
1673 | ||
1674 | ||
813a224f | 1675 | static void __exit cypress_exit(void) |
1da177e4 | 1676 | { |
441b62c1 | 1677 | dbg("%s", __func__); |
1da177e4 | 1678 | |
813a224f AC |
1679 | usb_deregister(&cypress_driver); |
1680 | usb_serial_deregister(&cypress_earthmate_device); | |
1681 | usb_serial_deregister(&cypress_hidcom_device); | |
1682 | usb_serial_deregister(&cypress_ca42v2_device); | |
1da177e4 LT |
1683 | } |
1684 | ||
1685 | ||
1686 | module_init(cypress_init); | |
1687 | module_exit(cypress_exit); | |
1688 | ||
813a224f AC |
1689 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1690 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1691 | MODULE_VERSION(DRIVER_VERSION); | |
1da177e4 LT |
1692 | MODULE_LICENSE("GPL"); |
1693 | ||
1694 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1695 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1696 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1697 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1698 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1699 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); |