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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 | 66 | #include <linux/serial.h> |
117fb8d0 | 67 | #include <linux/kfifo.h> |
1da177e4 | 68 | #include <linux/delay.h> |
813a224f | 69 | #include <linux/uaccess.h> |
0f2c2d7b | 70 | #include <asm/unaligned.h> |
1da177e4 | 71 | |
1da177e4 LT |
72 | #include "cypress_m8.h" |
73 | ||
74 | ||
64319dd7 | 75 | static int debug; |
1da177e4 | 76 | static int stats; |
3cb4a4f7 | 77 | static int interval; |
c312659c | 78 | static int unstable_bauds; |
1da177e4 LT |
79 | |
80 | /* | |
81 | * Version Information | |
82 | */ | |
117fb8d0 | 83 | #define DRIVER_VERSION "v1.10" |
1da177e4 LT |
84 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
85 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
86 | ||
87 | /* write buffer size defines */ | |
88 | #define CYPRESS_BUF_SIZE 1024 | |
1da177e4 | 89 | |
7d40d7e8 | 90 | static const struct usb_device_id id_table_earthmate[] = { |
1da177e4 | 91 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 92 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
93 | { } /* Terminating entry */ |
94 | }; | |
95 | ||
7d40d7e8 | 96 | static const struct usb_device_id id_table_cyphidcomrs232[] = { |
1da177e4 | 97 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 98 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
1da177e4 LT |
99 | { } /* Terminating entry */ |
100 | }; | |
101 | ||
7d40d7e8 | 102 | static const struct usb_device_id id_table_nokiaca42v2[] = { |
a5c44e29 LM |
103 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
104 | { } /* Terminating entry */ | |
105 | }; | |
106 | ||
7d40d7e8 | 107 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 | 108 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 109 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 110 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 111 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
a5c44e29 | 112 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
113 | { } /* Terminating entry */ |
114 | }; | |
115 | ||
813a224f | 116 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
117 | |
118 | static struct usb_driver cypress_driver = { | |
119 | .name = "cypress", | |
120 | .probe = usb_serial_probe, | |
121 | .disconnect = usb_serial_disconnect, | |
122 | .id_table = id_table_combined, | |
ba9dc657 | 123 | .no_dynamic_id = 1, |
1da177e4 LT |
124 | }; |
125 | ||
3416eaa1 MI |
126 | enum packet_format { |
127 | packet_format_1, /* b0:status, b1:payload count */ | |
128 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
129 | }; | |
130 | ||
1da177e4 LT |
131 | struct cypress_private { |
132 | spinlock_t lock; /* private lock */ | |
133 | int chiptype; /* identifier of device, for quirks/etc */ | |
134 | int bytes_in; /* used for statistics */ | |
135 | int bytes_out; /* used for statistics */ | |
136 | int cmd_count; /* used for statistics */ | |
137 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
117fb8d0 | 138 | struct kfifo write_fifo; /* write fifo */ |
1da177e4 | 139 | int write_urb_in_use; /* write urb in use indicator */ |
0257fa9f MI |
140 | int write_urb_interval; /* interval to use for write urb */ |
141 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 142 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
143 | int termios_initialized; |
144 | __u8 line_control; /* holds dtr / rts value */ | |
145 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
146 | __u8 current_config; /* stores the current configuration byte */ | |
147 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 148 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 149 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
150 | int baud_rate; /* stores current baud rate in |
151 | integer form */ | |
1da177e4 LT |
152 | int isthrottled; /* if throttled, discard reads */ |
153 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
154 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
3ad2f3fb | 155 | /* we pass a pointer to this as the argument sent to |
813a224f | 156 | cypress_set_termios old_termios */ |
606d099c | 157 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
158 | }; |
159 | ||
1da177e4 | 160 | /* function prototypes for the Cypress USB to serial device */ |
813a224f AC |
161 | static int cypress_earthmate_startup(struct usb_serial *serial); |
162 | static int cypress_hidcom_startup(struct usb_serial *serial); | |
163 | static int cypress_ca42v2_startup(struct usb_serial *serial); | |
f9c99bb8 | 164 | static void cypress_release(struct usb_serial *serial); |
a509a7e4 | 165 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
166 | static void cypress_close(struct usb_serial_port *port); |
167 | static void cypress_dtr_rts(struct usb_serial_port *port, int on); | |
813a224f AC |
168 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
169 | const unsigned char *buf, int count); | |
170 | static void cypress_send(struct usb_serial_port *port); | |
171 | static int cypress_write_room(struct tty_struct *tty); | |
172 | static int cypress_ioctl(struct tty_struct *tty, struct file *file, | |
173 | unsigned int cmd, unsigned long arg); | |
174 | static void cypress_set_termios(struct tty_struct *tty, | |
175 | struct usb_serial_port *port, struct ktermios *old); | |
176 | static int cypress_tiocmget(struct tty_struct *tty, struct file *file); | |
177 | static int cypress_tiocmset(struct tty_struct *tty, struct file *file, | |
178 | unsigned int set, unsigned int clear); | |
179 | static int cypress_chars_in_buffer(struct tty_struct *tty); | |
180 | static void cypress_throttle(struct tty_struct *tty); | |
181 | static void cypress_unthrottle(struct tty_struct *tty); | |
182 | static void cypress_set_dead(struct usb_serial_port *port); | |
183 | static void cypress_read_int_callback(struct urb *urb); | |
184 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 | 185 | |
ea65370d | 186 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
187 | .driver = { |
188 | .owner = THIS_MODULE, | |
269bda1c | 189 | .name = "earthmate", |
18fcac35 | 190 | }, |
269bda1c | 191 | .description = "DeLorme Earthmate USB", |
d9b1b787 | 192 | .usb_driver = &cypress_driver, |
1da177e4 | 193 | .id_table = id_table_earthmate, |
1da177e4 LT |
194 | .num_ports = 1, |
195 | .attach = cypress_earthmate_startup, | |
f9c99bb8 | 196 | .release = cypress_release, |
1da177e4 LT |
197 | .open = cypress_open, |
198 | .close = cypress_close, | |
335f8514 | 199 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
200 | .write = cypress_write, |
201 | .write_room = cypress_write_room, | |
202 | .ioctl = cypress_ioctl, | |
203 | .set_termios = cypress_set_termios, | |
204 | .tiocmget = cypress_tiocmget, | |
205 | .tiocmset = cypress_tiocmset, | |
206 | .chars_in_buffer = cypress_chars_in_buffer, | |
207 | .throttle = cypress_throttle, | |
208 | .unthrottle = cypress_unthrottle, | |
209 | .read_int_callback = cypress_read_int_callback, | |
210 | .write_int_callback = cypress_write_int_callback, | |
211 | }; | |
212 | ||
ea65370d | 213 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
214 | .driver = { |
215 | .owner = THIS_MODULE, | |
269bda1c | 216 | .name = "cyphidcom", |
18fcac35 | 217 | }, |
269bda1c | 218 | .description = "HID->COM RS232 Adapter", |
d9b1b787 | 219 | .usb_driver = &cypress_driver, |
1da177e4 | 220 | .id_table = id_table_cyphidcomrs232, |
1da177e4 LT |
221 | .num_ports = 1, |
222 | .attach = cypress_hidcom_startup, | |
f9c99bb8 | 223 | .release = cypress_release, |
1da177e4 LT |
224 | .open = cypress_open, |
225 | .close = cypress_close, | |
335f8514 | 226 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
227 | .write = cypress_write, |
228 | .write_room = cypress_write_room, | |
229 | .ioctl = cypress_ioctl, | |
230 | .set_termios = cypress_set_termios, | |
231 | .tiocmget = cypress_tiocmget, | |
232 | .tiocmset = cypress_tiocmset, | |
233 | .chars_in_buffer = cypress_chars_in_buffer, | |
234 | .throttle = cypress_throttle, | |
235 | .unthrottle = cypress_unthrottle, | |
236 | .read_int_callback = cypress_read_int_callback, | |
237 | .write_int_callback = cypress_write_int_callback, | |
238 | }; | |
239 | ||
a5c44e29 LM |
240 | static struct usb_serial_driver cypress_ca42v2_device = { |
241 | .driver = { | |
242 | .owner = THIS_MODULE, | |
813a224f | 243 | .name = "nokiaca42v2", |
a5c44e29 LM |
244 | }, |
245 | .description = "Nokia CA-42 V2 Adapter", | |
d9b1b787 | 246 | .usb_driver = &cypress_driver, |
a5c44e29 | 247 | .id_table = id_table_nokiaca42v2, |
a5c44e29 LM |
248 | .num_ports = 1, |
249 | .attach = cypress_ca42v2_startup, | |
f9c99bb8 | 250 | .release = cypress_release, |
a5c44e29 LM |
251 | .open = cypress_open, |
252 | .close = cypress_close, | |
335f8514 | 253 | .dtr_rts = cypress_dtr_rts, |
a5c44e29 LM |
254 | .write = cypress_write, |
255 | .write_room = cypress_write_room, | |
256 | .ioctl = cypress_ioctl, | |
257 | .set_termios = cypress_set_termios, | |
258 | .tiocmget = cypress_tiocmget, | |
259 | .tiocmset = cypress_tiocmset, | |
260 | .chars_in_buffer = cypress_chars_in_buffer, | |
261 | .throttle = cypress_throttle, | |
262 | .unthrottle = cypress_unthrottle, | |
263 | .read_int_callback = cypress_read_int_callback, | |
264 | .write_int_callback = cypress_write_int_callback, | |
265 | }; | |
1da177e4 LT |
266 | |
267 | /***************************************************************************** | |
268 | * Cypress serial helper functions | |
269 | *****************************************************************************/ | |
270 | ||
271 | ||
8873aaa6 | 272 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 273 | { |
92983c21 MI |
274 | struct cypress_private *priv; |
275 | priv = usb_get_serial_port_data(port); | |
276 | ||
c312659c MF |
277 | if (unstable_bauds) |
278 | return new_rate; | |
279 | ||
92983c21 MI |
280 | /* |
281 | * The general purpose firmware for the Cypress M8 allows for | |
282 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
283 | * chose to use the general purpose firmware or not), if you | |
284 | * need to modify this speed setting for your own project | |
285 | * please add your own chiptype and modify the code likewise. | |
286 | * The Cypress HID->COM device will work successfully up to | |
287 | * 115200bps (but the actual throughput is around 3kBps). | |
288 | */ | |
92983c21 MI |
289 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
290 | /* | |
291 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
292 | * Cypress app note that describes this mechanism | |
293 | * states the the low-speed part can't handle more | |
294 | * than 800 bytes/sec, in which case 4800 baud is the | |
295 | * safest speed for a part like that. | |
296 | */ | |
297 | if (new_rate > 4800) { | |
298 | dbg("%s - failed setting baud rate, device incapable " | |
299 | "speed %d", __func__, new_rate); | |
300 | return -1; | |
301 | } | |
302 | } | |
303 | switch (priv->chiptype) { | |
304 | case CT_EARTHMATE: | |
305 | if (new_rate <= 600) { | |
306 | /* 300 and 600 baud rates are supported under | |
307 | * the generic firmware, but are not used with | |
308 | * NMEA and SiRF protocols */ | |
309 | dbg("%s - failed setting baud rate, unsupported speed " | |
310 | "of %d on Earthmate GPS", __func__, new_rate); | |
311 | return -1; | |
312 | } | |
313 | break; | |
314 | default: | |
315 | break; | |
316 | } | |
317 | return new_rate; | |
318 | } | |
319 | ||
320 | ||
093cf723 | 321 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 322 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
323 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
324 | int stop_bits, int parity_enable, int parity_type, int reset, | |
325 | int cypress_request_type) | |
1da177e4 | 326 | { |
3cb4a4f7 | 327 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 328 | struct cypress_private *priv; |
0954644b JH |
329 | u8 *feature_buffer; |
330 | const unsigned int feature_len = 5; | |
1da177e4 LT |
331 | unsigned long flags; |
332 | ||
441b62c1 | 333 | dbg("%s", __func__); |
813a224f | 334 | |
1da177e4 LT |
335 | priv = usb_get_serial_port_data(port); |
336 | ||
78aef519 MI |
337 | if (!priv->comm_is_ok) |
338 | return -ENODEV; | |
339 | ||
0954644b JH |
340 | feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL); |
341 | if (!feature_buffer) | |
342 | return -ENOMEM; | |
343 | ||
813a224f AC |
344 | switch (cypress_request_type) { |
345 | case CYPRESS_SET_CONFIG: | |
813a224f | 346 | /* 0 means 'Hang up' so doesn't change the true bit rate */ |
2805eb13 MF |
347 | new_baudrate = priv->baud_rate; |
348 | if (baud_rate && baud_rate != priv->baud_rate) { | |
813a224f AC |
349 | dbg("%s - baud rate is changing", __func__); |
350 | retval = analyze_baud_rate(port, baud_rate); | |
2805eb13 | 351 | if (retval >= 0) { |
813a224f AC |
352 | new_baudrate = retval; |
353 | dbg("%s - New baud rate set to %d", | |
354 | __func__, new_baudrate); | |
1da177e4 | 355 | } |
813a224f AC |
356 | } |
357 | dbg("%s - baud rate is being sent as %d", | |
358 | __func__, new_baudrate); | |
359 | ||
813a224f | 360 | /* fill the feature_buffer with new configuration */ |
0f2c2d7b | 361 | put_unaligned_le32(new_baudrate, feature_buffer); |
813a224f AC |
362 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
363 | /* 1 bit gap */ | |
364 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
365 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
366 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
367 | /* 1 bit gap */ | |
368 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
369 | ||
370 | dbg("%s - device is being sent this feature report:", | |
371 | __func__); | |
372 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __func__, | |
373 | feature_buffer[0], feature_buffer[1], | |
374 | feature_buffer[2], feature_buffer[3], | |
375 | feature_buffer[4]); | |
376 | ||
377 | do { | |
378 | retval = usb_control_msg(port->serial->dev, | |
379 | usb_sndctrlpipe(port->serial->dev, 0), | |
380 | HID_REQ_SET_REPORT, | |
381 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
382 | 0x0300, 0, feature_buffer, | |
0954644b | 383 | feature_len, 500); |
813a224f AC |
384 | |
385 | if (tries++ >= 3) | |
386 | break; | |
387 | ||
0954644b | 388 | } while (retval != feature_len && |
813a224f AC |
389 | retval != -ENODEV); |
390 | ||
0954644b | 391 | if (retval != feature_len) { |
194343d9 GKH |
392 | dev_err(&port->dev, "%s - failed sending serial " |
393 | "line settings - %d\n", __func__, retval); | |
813a224f AC |
394 | cypress_set_dead(port); |
395 | } else { | |
396 | spin_lock_irqsave(&priv->lock, flags); | |
397 | priv->baud_rate = new_baudrate; | |
398 | priv->current_config = feature_buffer[4]; | |
399 | spin_unlock_irqrestore(&priv->lock, flags); | |
400 | /* If we asked for a speed change encode it */ | |
401 | if (baud_rate) | |
402 | tty_encode_baud_rate(tty, | |
403 | new_baudrate, new_baudrate); | |
404 | } | |
405 | break; | |
406 | case CYPRESS_GET_CONFIG: | |
407 | if (priv->get_cfg_unsafe) { | |
408 | /* Not implemented for this device, | |
409 | and if we try to do it we're likely | |
410 | to crash the hardware. */ | |
0954644b JH |
411 | retval = -ENOTTY; |
412 | goto out; | |
813a224f AC |
413 | } |
414 | dbg("%s - retreiving serial line settings", __func__); | |
813a224f AC |
415 | do { |
416 | retval = usb_control_msg(port->serial->dev, | |
417 | usb_rcvctrlpipe(port->serial->dev, 0), | |
418 | HID_REQ_GET_REPORT, | |
419 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
420 | 0x0300, 0, feature_buffer, | |
0954644b | 421 | feature_len, 500); |
813a224f AC |
422 | |
423 | if (tries++ >= 3) | |
424 | break; | |
0954644b | 425 | } while (retval != feature_len |
813a224f AC |
426 | && retval != -ENODEV); |
427 | ||
0954644b | 428 | if (retval != feature_len) { |
194343d9 GKH |
429 | dev_err(&port->dev, "%s - failed to retrieve serial " |
430 | "line settings - %d\n", __func__, retval); | |
813a224f | 431 | cypress_set_dead(port); |
0954644b | 432 | goto out; |
813a224f AC |
433 | } else { |
434 | spin_lock_irqsave(&priv->lock, flags); | |
435 | /* store the config in one byte, and later | |
436 | use bit masks to check values */ | |
437 | priv->current_config = feature_buffer[4]; | |
0f2c2d7b | 438 | priv->baud_rate = get_unaligned_le32(feature_buffer); |
813a224f AC |
439 | spin_unlock_irqrestore(&priv->lock, flags); |
440 | } | |
1da177e4 | 441 | } |
3cb4a4f7 LM |
442 | spin_lock_irqsave(&priv->lock, flags); |
443 | ++priv->cmd_count; | |
444 | spin_unlock_irqrestore(&priv->lock, flags); | |
0954644b JH |
445 | out: |
446 | kfree(feature_buffer); | |
1da177e4 LT |
447 | return retval; |
448 | } /* cypress_serial_control */ | |
449 | ||
450 | ||
78aef519 MI |
451 | static void cypress_set_dead(struct usb_serial_port *port) |
452 | { | |
453 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
454 | unsigned long flags; | |
455 | ||
456 | spin_lock_irqsave(&priv->lock, flags); | |
457 | if (!priv->comm_is_ok) { | |
458 | spin_unlock_irqrestore(&priv->lock, flags); | |
459 | return; | |
460 | } | |
461 | priv->comm_is_ok = 0; | |
462 | spin_unlock_irqrestore(&priv->lock, flags); | |
463 | ||
194343d9 GKH |
464 | dev_err(&port->dev, "cypress_m8 suspending failing port %d - " |
465 | "interval might be too short\n", port->number); | |
78aef519 MI |
466 | } |
467 | ||
468 | ||
1da177e4 LT |
469 | /***************************************************************************** |
470 | * Cypress serial driver functions | |
471 | *****************************************************************************/ | |
472 | ||
473 | ||
813a224f | 474 | static int generic_startup(struct usb_serial *serial) |
1da177e4 LT |
475 | { |
476 | struct cypress_private *priv; | |
0257fa9f | 477 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 478 | |
441b62c1 | 479 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 480 | |
813a224f | 481 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
482 | if (!priv) |
483 | return -ENOMEM; | |
484 | ||
78aef519 | 485 | priv->comm_is_ok = !0; |
1da177e4 | 486 | spin_lock_init(&priv->lock); |
117fb8d0 | 487 | if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) { |
1da177e4 LT |
488 | kfree(priv); |
489 | return -ENOMEM; | |
490 | } | |
491 | init_waitqueue_head(&priv->delta_msr_wait); | |
813a224f AC |
492 | |
493 | usb_reset_configuration(serial->dev); | |
494 | ||
1da177e4 LT |
495 | priv->cmd_ctrl = 0; |
496 | priv->line_control = 0; | |
497 | priv->termios_initialized = 0; | |
1da177e4 | 498 | priv->rx_flags = 0; |
3416eaa1 MI |
499 | /* Default packet format setting is determined by packet size. |
500 | Anything with a size larger then 9 must have a separate | |
501 | count field since the 3 bit count field is otherwise too | |
502 | small. Otherwise we can use the slightly more compact | |
503 | format. This is in accordance with the cypress_m8 serial | |
504 | converter app note. */ | |
813a224f | 505 | if (port->interrupt_out_size > 9) |
3416eaa1 | 506 | priv->pkt_fmt = packet_format_1; |
813a224f | 507 | else |
3416eaa1 | 508 | priv->pkt_fmt = packet_format_2; |
813a224f | 509 | |
0257fa9f MI |
510 | if (interval > 0) { |
511 | priv->write_urb_interval = interval; | |
512 | priv->read_urb_interval = interval; | |
513 | dbg("%s - port %d read & write intervals forced to %d", | |
813a224f | 514 | __func__, port->number, interval); |
0257fa9f MI |
515 | } else { |
516 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
517 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
518 | dbg("%s - port %d intervals: read=%d write=%d", | |
813a224f AC |
519 | __func__, port->number, |
520 | priv->read_urb_interval, priv->write_urb_interval); | |
0257fa9f MI |
521 | } |
522 | usb_set_serial_port_data(port, priv); | |
813a224f | 523 | |
b9db07fb LM |
524 | return 0; |
525 | } | |
1da177e4 LT |
526 | |
527 | ||
813a224f | 528 | static int cypress_earthmate_startup(struct usb_serial *serial) |
1da177e4 LT |
529 | { |
530 | struct cypress_private *priv; | |
3d6aa320 | 531 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 532 | |
441b62c1 | 533 | dbg("%s", __func__); |
1da177e4 LT |
534 | |
535 | if (generic_startup(serial)) { | |
441b62c1 | 536 | dbg("%s - Failed setting up port %d", __func__, |
3d6aa320 | 537 | port->number); |
1da177e4 LT |
538 | return 1; |
539 | } | |
540 | ||
3d6aa320 | 541 | priv = usb_get_serial_port_data(port); |
1da177e4 | 542 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
543 | /* All Earthmate devices use the separated-count packet |
544 | format! Idiotic. */ | |
545 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
546 | if (serial->dev->descriptor.idProduct != |
547 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
548 | /* The old original USB Earthmate seemed able to |
549 | handle GET_CONFIG requests; everything they've | |
550 | produced since that time crashes if this command is | |
551 | attempted :-( */ | |
552 | dbg("%s - Marking this device as unsafe for GET_CONFIG " | |
553 | "commands", __func__); | |
554 | priv->get_cfg_unsafe = !0; | |
555 | } | |
b9db07fb LM |
556 | |
557 | return 0; | |
1da177e4 LT |
558 | } /* cypress_earthmate_startup */ |
559 | ||
560 | ||
813a224f | 561 | static int cypress_hidcom_startup(struct usb_serial *serial) |
1da177e4 LT |
562 | { |
563 | struct cypress_private *priv; | |
564 | ||
441b62c1 | 565 | dbg("%s", __func__); |
1da177e4 LT |
566 | |
567 | if (generic_startup(serial)) { | |
441b62c1 | 568 | dbg("%s - Failed setting up port %d", __func__, |
b9db07fb | 569 | serial->port[0]->number); |
1da177e4 LT |
570 | return 1; |
571 | } | |
572 | ||
573 | priv = usb_get_serial_port_data(serial->port[0]); | |
574 | priv->chiptype = CT_CYPHIDCOM; | |
813a224f | 575 | |
b9db07fb | 576 | return 0; |
1da177e4 LT |
577 | } /* cypress_hidcom_startup */ |
578 | ||
579 | ||
813a224f | 580 | static int cypress_ca42v2_startup(struct usb_serial *serial) |
a5c44e29 LM |
581 | { |
582 | struct cypress_private *priv; | |
583 | ||
441b62c1 | 584 | dbg("%s", __func__); |
a5c44e29 LM |
585 | |
586 | if (generic_startup(serial)) { | |
441b62c1 | 587 | dbg("%s - Failed setting up port %d", __func__, |
a5c44e29 LM |
588 | serial->port[0]->number); |
589 | return 1; | |
590 | } | |
591 | ||
592 | priv = usb_get_serial_port_data(serial->port[0]); | |
593 | priv->chiptype = CT_CA42V2; | |
594 | ||
595 | return 0; | |
596 | } /* cypress_ca42v2_startup */ | |
597 | ||
598 | ||
f9c99bb8 | 599 | static void cypress_release(struct usb_serial *serial) |
1da177e4 LT |
600 | { |
601 | struct cypress_private *priv; | |
602 | ||
813a224f | 603 | dbg("%s - port %d", __func__, serial->port[0]->number); |
1da177e4 LT |
604 | |
605 | /* all open ports are closed at this point */ | |
606 | ||
607 | priv = usb_get_serial_port_data(serial->port[0]); | |
608 | ||
609 | if (priv) { | |
117fb8d0 | 610 | kfifo_free(&priv->write_fifo); |
1da177e4 | 611 | kfree(priv); |
1da177e4 LT |
612 | } |
613 | } | |
614 | ||
615 | ||
a509a7e4 | 616 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
617 | { |
618 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
619 | struct usb_serial *serial = port->serial; | |
620 | unsigned long flags; | |
621 | int result = 0; | |
622 | ||
441b62c1 | 623 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 624 | |
78aef519 MI |
625 | if (!priv->comm_is_ok) |
626 | return -EIO; | |
627 | ||
1da177e4 | 628 | /* clear halts before open */ |
1da177e4 LT |
629 | usb_clear_halt(serial->dev, 0x81); |
630 | usb_clear_halt(serial->dev, 0x02); | |
631 | ||
632 | spin_lock_irqsave(&priv->lock, flags); | |
633 | /* reset read/write statistics */ | |
634 | priv->bytes_in = 0; | |
635 | priv->bytes_out = 0; | |
636 | priv->cmd_count = 0; | |
637 | priv->rx_flags = 0; | |
638 | spin_unlock_irqrestore(&priv->lock, flags); | |
639 | ||
335f8514 | 640 | /* Set termios */ |
fe1ae7fd | 641 | cypress_send(port); |
1da177e4 | 642 | |
95da310e AC |
643 | if (tty) |
644 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
645 | |
646 | /* setup the port and start reading from the device */ | |
813a224f | 647 | if (!port->interrupt_in_urb) { |
194343d9 GKH |
648 | dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n", |
649 | __func__); | |
813a224f | 650 | return -1; |
1da177e4 LT |
651 | } |
652 | ||
653 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
654 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
655 | port->interrupt_in_urb->transfer_buffer, |
656 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 657 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
658 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
659 | ||
813a224f AC |
660 | if (result) { |
661 | dev_err(&port->dev, | |
662 | "%s - failed submitting read urb, error %d\n", | |
663 | __func__, result); | |
78aef519 | 664 | cypress_set_dead(port); |
1da177e4 | 665 | } |
335f8514 | 666 | port->port.drain_delay = 256; |
1da177e4 LT |
667 | return result; |
668 | } /* cypress_open */ | |
669 | ||
335f8514 AC |
670 | static void cypress_dtr_rts(struct usb_serial_port *port, int on) |
671 | { | |
672 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
673 | /* drop dtr and rts */ | |
335f8514 AC |
674 | spin_lock_irq(&priv->lock); |
675 | if (on == 0) | |
676 | priv->line_control = 0; | |
677 | else | |
678 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
679 | priv->cmd_ctrl = 1; | |
680 | spin_unlock_irq(&priv->lock); | |
681 | cypress_write(NULL, port, NULL, 0); | |
682 | } | |
1da177e4 | 683 | |
335f8514 | 684 | static void cypress_close(struct usb_serial_port *port) |
1da177e4 LT |
685 | { |
686 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
117fb8d0 | 687 | unsigned long flags; |
1da177e4 | 688 | |
441b62c1 | 689 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 690 | |
9e3b1d8e ON |
691 | /* writing is potentially harmful, lock must be taken */ |
692 | mutex_lock(&port->serial->disc_mutex); | |
693 | if (port->serial->disconnected) { | |
694 | mutex_unlock(&port->serial->disc_mutex); | |
695 | return; | |
696 | } | |
117fb8d0 JH |
697 | spin_lock_irqsave(&priv->lock, flags); |
698 | kfifo_reset_out(&priv->write_fifo); | |
699 | spin_unlock_irqrestore(&priv->lock, flags); | |
700 | ||
441b62c1 | 701 | dbg("%s - stopping urbs", __func__); |
813a224f AC |
702 | usb_kill_urb(port->interrupt_in_urb); |
703 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 704 | |
1da177e4 | 705 | if (stats) |
813a224f AC |
706 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
707 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
9e3b1d8e | 708 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
709 | } /* cypress_close */ |
710 | ||
711 | ||
95da310e AC |
712 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
713 | const unsigned char *buf, int count) | |
1da177e4 LT |
714 | { |
715 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
813a224f | 716 | |
441b62c1 | 717 | dbg("%s - port %d, %d bytes", __func__, port->number, count); |
1da177e4 LT |
718 | |
719 | /* line control commands, which need to be executed immediately, | |
720 | are not put into the buffer for obvious reasons. | |
721 | */ | |
722 | if (priv->cmd_ctrl) { | |
723 | count = 0; | |
724 | goto finish; | |
725 | } | |
813a224f | 726 | |
1da177e4 LT |
727 | if (!count) |
728 | return count; | |
813a224f | 729 | |
117fb8d0 | 730 | count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock); |
1da177e4 LT |
731 | |
732 | finish: | |
733 | cypress_send(port); | |
734 | ||
735 | return count; | |
736 | } /* cypress_write */ | |
737 | ||
738 | ||
739 | static void cypress_send(struct usb_serial_port *port) | |
740 | { | |
741 | int count = 0, result, offset, actual_size; | |
742 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
743 | unsigned long flags; | |
813a224f | 744 | |
78aef519 MI |
745 | if (!priv->comm_is_ok) |
746 | return; | |
747 | ||
441b62c1 | 748 | dbg("%s - port %d", __func__, port->number); |
813a224f AC |
749 | dbg("%s - interrupt out size is %d", __func__, |
750 | port->interrupt_out_size); | |
751 | ||
1da177e4 LT |
752 | spin_lock_irqsave(&priv->lock, flags); |
753 | if (priv->write_urb_in_use) { | |
441b62c1 | 754 | dbg("%s - can't write, urb in use", __func__); |
1da177e4 LT |
755 | spin_unlock_irqrestore(&priv->lock, flags); |
756 | return; | |
757 | } | |
758 | spin_unlock_irqrestore(&priv->lock, flags); | |
759 | ||
760 | /* clear buffer */ | |
813a224f AC |
761 | memset(port->interrupt_out_urb->transfer_buffer, 0, |
762 | port->interrupt_out_size); | |
1da177e4 LT |
763 | |
764 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
765 | switch (priv->pkt_fmt) { |
766 | default: | |
767 | case packet_format_1: | |
768 | /* this is for the CY7C64013... */ | |
769 | offset = 2; | |
770 | port->interrupt_out_buffer[0] = priv->line_control; | |
771 | break; | |
772 | case packet_format_2: | |
773 | /* this is for the CY7C63743... */ | |
774 | offset = 1; | |
775 | port->interrupt_out_buffer[0] = priv->line_control; | |
776 | break; | |
1da177e4 LT |
777 | } |
778 | ||
779 | if (priv->line_control & CONTROL_RESET) | |
780 | priv->line_control &= ~CONTROL_RESET; | |
781 | ||
782 | if (priv->cmd_ctrl) { | |
783 | priv->cmd_count++; | |
441b62c1 | 784 | dbg("%s - line control command being issued", __func__); |
1da177e4 LT |
785 | spin_unlock_irqrestore(&priv->lock, flags); |
786 | goto send; | |
787 | } else | |
788 | spin_unlock_irqrestore(&priv->lock, flags); | |
789 | ||
117fb8d0 JH |
790 | count = kfifo_out_locked(&priv->write_fifo, |
791 | &port->interrupt_out_buffer[offset], | |
792 | port->interrupt_out_size - offset, | |
793 | &priv->lock); | |
813a224f | 794 | if (count == 0) |
1da177e4 | 795 | return; |
1da177e4 | 796 | |
3416eaa1 MI |
797 | switch (priv->pkt_fmt) { |
798 | default: | |
799 | case packet_format_1: | |
800 | port->interrupt_out_buffer[1] = count; | |
801 | break; | |
802 | case packet_format_2: | |
803 | port->interrupt_out_buffer[0] |= count; | |
1da177e4 LT |
804 | } |
805 | ||
441b62c1 | 806 | dbg("%s - count is %d", __func__, count); |
1da177e4 LT |
807 | |
808 | send: | |
809 | spin_lock_irqsave(&priv->lock, flags); | |
810 | priv->write_urb_in_use = 1; | |
811 | spin_unlock_irqrestore(&priv->lock, flags); | |
812 | ||
813 | if (priv->cmd_ctrl) | |
814 | actual_size = 1; | |
815 | else | |
3416eaa1 MI |
816 | actual_size = count + |
817 | (priv->pkt_fmt == packet_format_1 ? 2 : 1); | |
818 | ||
813a224f AC |
819 | usb_serial_debug_data(debug, &port->dev, __func__, |
820 | port->interrupt_out_size, | |
821 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 822 | |
9aa8dae7 MI |
823 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
824 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
825 | port->interrupt_out_buffer, port->interrupt_out_size, | |
826 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 827 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 828 | if (result) { |
813a224f AC |
829 | dev_err(&port->dev, |
830 | "%s - failed submitting write urb, error %d\n", | |
831 | __func__, result); | |
1da177e4 | 832 | priv->write_urb_in_use = 0; |
78aef519 | 833 | cypress_set_dead(port); |
1da177e4 LT |
834 | } |
835 | ||
836 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 837 | if (priv->cmd_ctrl) |
1da177e4 | 838 | priv->cmd_ctrl = 0; |
813a224f AC |
839 | |
840 | /* do not count the line control and size bytes */ | |
841 | priv->bytes_out += count; | |
1da177e4 LT |
842 | spin_unlock_irqrestore(&priv->lock, flags); |
843 | ||
cf2c7481 | 844 | usb_serial_port_softint(port); |
1da177e4 LT |
845 | } /* cypress_send */ |
846 | ||
847 | ||
848 | /* returns how much space is available in the soft buffer */ | |
95da310e | 849 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 850 | { |
95da310e | 851 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
852 | struct cypress_private *priv = usb_get_serial_port_data(port); |
853 | int room = 0; | |
854 | unsigned long flags; | |
855 | ||
441b62c1 | 856 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
857 | |
858 | spin_lock_irqsave(&priv->lock, flags); | |
117fb8d0 | 859 | room = kfifo_avail(&priv->write_fifo); |
1da177e4 LT |
860 | spin_unlock_irqrestore(&priv->lock, flags); |
861 | ||
441b62c1 | 862 | dbg("%s - returns %d", __func__, room); |
1da177e4 LT |
863 | return room; |
864 | } | |
865 | ||
866 | ||
95da310e | 867 | static int cypress_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 868 | { |
95da310e | 869 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
870 | struct cypress_private *priv = usb_get_serial_port_data(port); |
871 | __u8 status, control; | |
872 | unsigned int result = 0; | |
873 | unsigned long flags; | |
813a224f | 874 | |
441b62c1 | 875 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
876 | |
877 | spin_lock_irqsave(&priv->lock, flags); | |
878 | control = priv->line_control; | |
879 | status = priv->current_status; | |
880 | spin_unlock_irqrestore(&priv->lock, flags); | |
881 | ||
882 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
883 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
884 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
885 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
886 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
887 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
888 | ||
441b62c1 | 889 | dbg("%s - result = %x", __func__, result); |
1da177e4 LT |
890 | |
891 | return result; | |
892 | } | |
893 | ||
894 | ||
95da310e | 895 | static int cypress_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
896 | unsigned int set, unsigned int clear) |
897 | { | |
95da310e | 898 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
899 | struct cypress_private *priv = usb_get_serial_port_data(port); |
900 | unsigned long flags; | |
813a224f | 901 | |
441b62c1 | 902 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
903 | |
904 | spin_lock_irqsave(&priv->lock, flags); | |
905 | if (set & TIOCM_RTS) | |
906 | priv->line_control |= CONTROL_RTS; | |
907 | if (set & TIOCM_DTR) | |
908 | priv->line_control |= CONTROL_DTR; | |
909 | if (clear & TIOCM_RTS) | |
910 | priv->line_control &= ~CONTROL_RTS; | |
911 | if (clear & TIOCM_DTR) | |
912 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 913 | priv->cmd_ctrl = 1; |
1da177e4 LT |
914 | spin_unlock_irqrestore(&priv->lock, flags); |
915 | ||
95da310e | 916 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
917 | } |
918 | ||
919 | ||
813a224f | 920 | static int cypress_ioctl(struct tty_struct *tty, struct file *file, |
95da310e | 921 | unsigned int cmd, unsigned long arg) |
1da177e4 | 922 | { |
95da310e | 923 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
924 | struct cypress_private *priv = usb_get_serial_port_data(port); |
925 | ||
441b62c1 | 926 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 LT |
927 | |
928 | switch (cmd) { | |
813a224f AC |
929 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ |
930 | case TIOCMIWAIT: | |
931 | while (priv != NULL) { | |
932 | interruptible_sleep_on(&priv->delta_msr_wait); | |
933 | /* see if a signal did it */ | |
934 | if (signal_pending(current)) | |
935 | return -ERESTARTSYS; | |
936 | else { | |
937 | char diff = priv->diff_status; | |
938 | if (diff == 0) | |
939 | return -EIO; /* no change => error */ | |
940 | ||
941 | /* consume all events */ | |
942 | priv->diff_status = 0; | |
943 | ||
944 | /* return 0 if caller wanted to know about | |
945 | these bits */ | |
946 | if (((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
947 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
948 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
949 | ((arg & TIOCM_CTS) && (diff & UART_CTS))) | |
950 | return 0; | |
951 | /* otherwise caller can't care less about what | |
952 | * happened, and so we continue to wait for | |
953 | * more events. | |
954 | */ | |
1da177e4 | 955 | } |
813a224f AC |
956 | } |
957 | return 0; | |
958 | default: | |
959 | break; | |
1da177e4 | 960 | } |
441b62c1 | 961 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __func__, cmd); |
1da177e4 LT |
962 | return -ENOIOCTLCMD; |
963 | } /* cypress_ioctl */ | |
964 | ||
965 | ||
95da310e AC |
966 | static void cypress_set_termios(struct tty_struct *tty, |
967 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
968 | { |
969 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1da177e4 | 970 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 971 | unsigned cflag, iflag; |
1da177e4 LT |
972 | unsigned long flags; |
973 | __u8 oldlines; | |
3cb4a4f7 | 974 | int linechange = 0; |
b9db07fb | 975 | |
441b62c1 | 976 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 977 | |
1da177e4 | 978 | spin_lock_irqsave(&priv->lock, flags); |
fe1ae7fd AC |
979 | /* We can't clean this one up as we don't know the device type |
980 | early enough */ | |
1da177e4 LT |
981 | if (!priv->termios_initialized) { |
982 | if (priv->chiptype == CT_EARTHMATE) { | |
983 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
984 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
985 | CLOCAL; | |
8873aaa6 AC |
986 | tty->termios->c_ispeed = 4800; |
987 | tty->termios->c_ospeed = 4800; | |
1da177e4 LT |
988 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
989 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
990 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
991 | CLOCAL; | |
8873aaa6 AC |
992 | tty->termios->c_ispeed = 9600; |
993 | tty->termios->c_ospeed = 9600; | |
a5c44e29 LM |
994 | } else if (priv->chiptype == CT_CA42V2) { |
995 | *(tty->termios) = tty_std_termios; | |
996 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
997 | CLOCAL; | |
8873aaa6 AC |
998 | tty->termios->c_ispeed = 9600; |
999 | tty->termios->c_ospeed = 9600; | |
1da177e4 LT |
1000 | } |
1001 | priv->termios_initialized = 1; | |
1002 | } | |
1003 | spin_unlock_irqrestore(&priv->lock, flags); | |
1004 | ||
8873aaa6 AC |
1005 | /* Unsupported features need clearing */ |
1006 | tty->termios->c_cflag &= ~(CMSPAR|CRTSCTS); | |
1007 | ||
1da177e4 LT |
1008 | cflag = tty->termios->c_cflag; |
1009 | iflag = tty->termios->c_iflag; | |
1010 | ||
1011 | /* check if there are new settings */ | |
1012 | if (old_termios) { | |
8873aaa6 AC |
1013 | spin_lock_irqsave(&priv->lock, flags); |
1014 | priv->tmp_termios = *(tty->termios); | |
1015 | spin_unlock_irqrestore(&priv->lock, flags); | |
1016 | } | |
1da177e4 LT |
1017 | |
1018 | /* set number of data bits, parity, stop bits */ | |
1019 | /* when parity is disabled the parity type bit is ignored */ | |
1020 | ||
b9db07fb LM |
1021 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
1022 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
1023 | ||
1da177e4 LT |
1024 | if (cflag & PARENB) { |
1025 | parity_enable = 1; | |
b9db07fb LM |
1026 | /* 1 means odd parity, 0 means even parity */ |
1027 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
1028 | } else |
1029 | parity_enable = parity_type = 0; | |
1030 | ||
77336828 AC |
1031 | switch (cflag & CSIZE) { |
1032 | case CS5: | |
1033 | data_bits = 0; | |
1034 | break; | |
1035 | case CS6: | |
1036 | data_bits = 1; | |
1037 | break; | |
1038 | case CS7: | |
1039 | data_bits = 2; | |
1040 | break; | |
1041 | case CS8: | |
1da177e4 | 1042 | data_bits = 3; |
77336828 AC |
1043 | break; |
1044 | default: | |
194343d9 GKH |
1045 | dev_err(&port->dev, "%s - CSIZE was set, but not CS5-CS8\n", |
1046 | __func__); | |
77336828 AC |
1047 | data_bits = 3; |
1048 | } | |
1da177e4 LT |
1049 | spin_lock_irqsave(&priv->lock, flags); |
1050 | oldlines = priv->line_control; | |
1051 | if ((cflag & CBAUD) == B0) { | |
1052 | /* drop dtr and rts */ | |
441b62c1 | 1053 | dbg("%s - dropping the lines, baud rate 0bps", __func__); |
1da177e4 | 1054 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 1055 | } else |
3cb4a4f7 | 1056 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 1057 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1058 | |
b9db07fb | 1059 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, " |
441b62c1 | 1060 | "%d data_bits (+5)", __func__, stop_bits, |
b9db07fb LM |
1061 | parity_enable, parity_type, data_bits); |
1062 | ||
813a224f AC |
1063 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
1064 | data_bits, stop_bits, | |
1065 | parity_enable, parity_type, | |
1066 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1067 | |
b9db07fb LM |
1068 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1069 | * filled into the private structure this should confirm that all is | |
1070 | * working if it returns what we just set */ | |
95da310e | 1071 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 1072 | |
b9db07fb LM |
1073 | /* Here we can define custom tty settings for devices; the main tty |
1074 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1075 | |
b9db07fb | 1076 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 1077 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
b9db07fb LM |
1078 | dbg("Using custom termios settings for a baud rate of " |
1079 | "4800bps."); | |
1da177e4 LT |
1080 | /* define custom termios settings for NMEA protocol */ |
1081 | ||
1da177e4 | 1082 | tty->termios->c_iflag /* input modes - */ |
b9db07fb LM |
1083 | &= ~(IGNBRK /* disable ignore break */ |
1084 | | BRKINT /* disable break causes interrupt */ | |
1085 | | PARMRK /* disable mark parity errors */ | |
1086 | | ISTRIP /* disable clear high bit of input char */ | |
1087 | | INLCR /* disable translate NL to CR */ | |
1088 | | IGNCR /* disable ignore CR */ | |
1089 | | ICRNL /* disable translate CR to NL */ | |
1090 | | IXON); /* disable enable XON/XOFF flow control */ | |
1091 | ||
1da177e4 | 1092 | tty->termios->c_oflag /* output modes */ |
b9db07fb | 1093 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1094 | |
b9db07fb LM |
1095 | tty->termios->c_lflag /* line discipline modes */ |
1096 | &= ~(ECHO /* disable echo input characters */ | |
1097 | | ECHONL /* disable echo new line */ | |
1098 | | ICANON /* disable erase, kill, werase, and rprnt | |
1099 | special characters */ | |
1100 | | ISIG /* disable interrupt, quit, and suspend | |
1101 | special characters */ | |
1102 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1103 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1104 | |
1da177e4 LT |
1105 | linechange = (priv->line_control != oldlines); |
1106 | spin_unlock_irqrestore(&priv->lock, flags); | |
1107 | ||
1108 | /* if necessary, set lines */ | |
3cb4a4f7 | 1109 | if (linechange) { |
1da177e4 | 1110 | priv->cmd_ctrl = 1; |
95da310e | 1111 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1112 | } |
1da177e4 LT |
1113 | } /* cypress_set_termios */ |
1114 | ||
b9db07fb | 1115 | |
1da177e4 | 1116 | /* returns amount of data still left in soft buffer */ |
95da310e | 1117 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1118 | { |
95da310e | 1119 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1120 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1121 | int chars = 0; | |
1122 | unsigned long flags; | |
1123 | ||
441b62c1 | 1124 | dbg("%s - port %d", __func__, port->number); |
813a224f | 1125 | |
1da177e4 | 1126 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 1127 | chars = kfifo_len(&priv->write_fifo); |
1da177e4 LT |
1128 | spin_unlock_irqrestore(&priv->lock, flags); |
1129 | ||
441b62c1 | 1130 | dbg("%s - returns %d", __func__, chars); |
1da177e4 LT |
1131 | return chars; |
1132 | } | |
1133 | ||
1134 | ||
95da310e | 1135 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1136 | { |
95da310e | 1137 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1138 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1da177e4 | 1139 | |
441b62c1 | 1140 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1141 | |
63832515 | 1142 | spin_lock_irq(&priv->lock); |
1da177e4 | 1143 | priv->rx_flags = THROTTLED; |
63832515 | 1144 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
1145 | } |
1146 | ||
1147 | ||
95da310e | 1148 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1149 | { |
95da310e | 1150 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1151 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1152 | int actually_throttled, result; | |
1da177e4 | 1153 | |
441b62c1 | 1154 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1155 | |
63832515 | 1156 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
1157 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
1158 | priv->rx_flags = 0; | |
63832515 | 1159 | spin_unlock_irq(&priv->lock); |
1da177e4 | 1160 | |
78aef519 MI |
1161 | if (!priv->comm_is_ok) |
1162 | return; | |
1163 | ||
1da177e4 LT |
1164 | if (actually_throttled) { |
1165 | port->interrupt_in_urb->dev = port->serial->dev; | |
1166 | ||
63832515 | 1167 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
78aef519 | 1168 | if (result) { |
b9db07fb | 1169 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1170 | "error %d\n", __func__, result); |
78aef519 MI |
1171 | cypress_set_dead(port); |
1172 | } | |
1da177e4 LT |
1173 | } |
1174 | } | |
1175 | ||
1176 | ||
7d12e780 | 1177 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1178 | { |
cdc97792 | 1179 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1180 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1181 | struct tty_struct *tty; | |
1182 | unsigned char *data = urb->transfer_buffer; | |
1183 | unsigned long flags; | |
b9db07fb | 1184 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1185 | int havedata = 0; |
1186 | int bytes = 0; | |
1187 | int result; | |
1188 | int i = 0; | |
8d7bc55e | 1189 | int status = urb->status; |
1da177e4 | 1190 | |
441b62c1 | 1191 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1192 | |
8d7bc55e | 1193 | switch (status) { |
78aef519 MI |
1194 | case 0: /* success */ |
1195 | break; | |
1196 | case -ECONNRESET: | |
1197 | case -ENOENT: | |
1198 | case -ESHUTDOWN: | |
1199 | /* precursor to disconnect so just go away */ | |
1200 | return; | |
1201 | case -EPIPE: | |
4d2fae8b AS |
1202 | /* Can't call usb_clear_halt while in_interrupt */ |
1203 | /* FALLS THROUGH */ | |
78aef519 MI |
1204 | default: |
1205 | /* something ugly is going on... */ | |
813a224f AC |
1206 | dev_err(&urb->dev->dev, |
1207 | "%s - unexpected nonzero read status received: %d\n", | |
1208 | __func__, status); | |
78aef519 | 1209 | cypress_set_dead(port); |
1da177e4 LT |
1210 | return; |
1211 | } | |
1212 | ||
1213 | spin_lock_irqsave(&priv->lock, flags); | |
1214 | if (priv->rx_flags & THROTTLED) { | |
441b62c1 | 1215 | dbg("%s - now throttling", __func__); |
1da177e4 LT |
1216 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1217 | spin_unlock_irqrestore(&priv->lock, flags); | |
1218 | return; | |
1219 | } | |
1220 | spin_unlock_irqrestore(&priv->lock, flags); | |
1221 | ||
4a90f09b | 1222 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1223 | if (!tty) { |
441b62c1 | 1224 | dbg("%s - bad tty pointer - exiting", __func__); |
1da177e4 LT |
1225 | return; |
1226 | } | |
1227 | ||
1228 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1229 | result = urb->actual_length; |
1230 | switch (priv->pkt_fmt) { | |
1231 | default: | |
1232 | case packet_format_1: | |
1233 | /* This is for the CY7C64013... */ | |
1234 | priv->current_status = data[0] & 0xF8; | |
1235 | bytes = data[1] + 2; | |
1236 | i = 2; | |
1237 | if (bytes > 2) | |
1238 | havedata = 1; | |
1239 | break; | |
1240 | case packet_format_2: | |
1241 | /* This is for the CY7C63743... */ | |
1242 | priv->current_status = data[0] & 0xF8; | |
1243 | bytes = (data[0] & 0x07) + 1; | |
1244 | i = 1; | |
1245 | if (bytes > 1) | |
1246 | havedata = 1; | |
1247 | break; | |
1da177e4 LT |
1248 | } |
1249 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 MI |
1250 | if (result < bytes) { |
1251 | dbg("%s - wrong packet size - received %d bytes but packet " | |
1252 | "said %d bytes", __func__, result, bytes); | |
1253 | goto continue_read; | |
1254 | } | |
1da177e4 | 1255 | |
813a224f AC |
1256 | usb_serial_debug_data(debug, &port->dev, __func__, |
1257 | urb->actual_length, data); | |
1da177e4 LT |
1258 | |
1259 | spin_lock_irqsave(&priv->lock, flags); | |
1260 | /* check to see if status has changed */ | |
6768306c MI |
1261 | if (priv->current_status != priv->prev_status) { |
1262 | priv->diff_status |= priv->current_status ^ | |
1263 | priv->prev_status; | |
1264 | wake_up_interruptible(&priv->delta_msr_wait); | |
1265 | priv->prev_status = priv->current_status; | |
1da177e4 | 1266 | } |
b9db07fb | 1267 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1268 | |
b9db07fb LM |
1269 | /* hangup, as defined in acm.c... this might be a bad place for it |
1270 | * though */ | |
1271 | if (tty && !(tty->termios->c_cflag & CLOCAL) && | |
1272 | !(priv->current_status & UART_CD)) { | |
441b62c1 | 1273 | dbg("%s - calling hangup", __func__); |
1da177e4 LT |
1274 | tty_hangup(tty); |
1275 | goto continue_read; | |
1276 | } | |
1277 | ||
b9db07fb LM |
1278 | /* There is one error bit... I'm assuming it is a parity error |
1279 | * indicator as the generic firmware will set this bit to 1 if a | |
1280 | * parity error occurs. | |
1281 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1282 | spin_lock_irqsave(&priv->lock, flags); |
1283 | if (priv->current_status & CYP_ERROR) { | |
1284 | spin_unlock_irqrestore(&priv->lock, flags); | |
1285 | tty_flag = TTY_PARITY; | |
441b62c1 | 1286 | dbg("%s - Parity Error detected", __func__); |
1da177e4 LT |
1287 | } else |
1288 | spin_unlock_irqrestore(&priv->lock, flags); | |
1289 | ||
1290 | /* process read if there is data other than line status */ | |
a108bfcb AC |
1291 | if (tty && bytes > i) { |
1292 | tty_insert_flip_string_fixed_flag(tty, data + i, | |
70ced221 | 1293 | tty_flag, bytes - i); |
4a90f09b | 1294 | tty_flip_buffer_push(tty); |
1da177e4 LT |
1295 | } |
1296 | ||
1297 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1298 | /* control and status byte(s) are also counted */ |
1299 | priv->bytes_in += bytes; | |
1da177e4 LT |
1300 | spin_unlock_irqrestore(&priv->lock, flags); |
1301 | ||
1302 | continue_read: | |
4a90f09b | 1303 | tty_kref_put(tty); |
b9db07fb | 1304 | |
1f87158e | 1305 | /* Continue trying to always read */ |
1da177e4 | 1306 | |
1f87158e | 1307 | if (priv->comm_is_ok) { |
b9db07fb LM |
1308 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1309 | usb_rcvintpipe(port->serial->dev, | |
1310 | port->interrupt_in_endpointAddress), | |
1311 | port->interrupt_in_urb->transfer_buffer, | |
1312 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1313 | cypress_read_int_callback, port, |
1314 | priv->read_urb_interval); | |
b9db07fb | 1315 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
1f87158e | 1316 | if (result && result != -EPERM) { |
b9db07fb | 1317 | dev_err(&urb->dev->dev, "%s - failed resubmitting " |
441b62c1 | 1318 | "read urb, error %d\n", __func__, |
b9db07fb | 1319 | result); |
78aef519 MI |
1320 | cypress_set_dead(port); |
1321 | } | |
1da177e4 | 1322 | } |
1da177e4 LT |
1323 | } /* cypress_read_int_callback */ |
1324 | ||
1325 | ||
7d12e780 | 1326 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1327 | { |
cdc97792 | 1328 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1329 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1330 | int result; | |
8d7bc55e | 1331 | int status = urb->status; |
1da177e4 | 1332 | |
441b62c1 | 1333 | dbg("%s - port %d", __func__, port->number); |
8d7bc55e GKH |
1334 | |
1335 | switch (status) { | |
813a224f AC |
1336 | case 0: |
1337 | /* success */ | |
1338 | break; | |
1339 | case -ECONNRESET: | |
1340 | case -ENOENT: | |
1341 | case -ESHUTDOWN: | |
1342 | /* this urb is terminated, clean up */ | |
1343 | dbg("%s - urb shutting down with status: %d", | |
1344 | __func__, status); | |
1345 | priv->write_urb_in_use = 0; | |
1346 | return; | |
1347 | case -EPIPE: /* no break needed; clear halt and resubmit */ | |
1348 | if (!priv->comm_is_ok) | |
1da177e4 | 1349 | break; |
813a224f AC |
1350 | usb_clear_halt(port->serial->dev, 0x02); |
1351 | /* error in the urb, so we have to resubmit it */ | |
1352 | dbg("%s - nonzero write bulk status received: %d", | |
1353 | __func__, status); | |
1354 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
1355 | port->interrupt_out_urb->dev = port->serial->dev; | |
1356 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); | |
1357 | if (!result) | |
1da177e4 | 1358 | return; |
813a224f AC |
1359 | dev_err(&urb->dev->dev, |
1360 | "%s - failed resubmitting write urb, error %d\n", | |
1361 | __func__, result); | |
1362 | cypress_set_dead(port); | |
1363 | break; | |
1364 | default: | |
1365 | dev_err(&urb->dev->dev, | |
1366 | "%s - unexpected nonzero write status received: %d\n", | |
1367 | __func__, status); | |
1368 | cypress_set_dead(port); | |
1369 | break; | |
1da177e4 | 1370 | } |
1da177e4 | 1371 | priv->write_urb_in_use = 0; |
813a224f | 1372 | |
1da177e4 LT |
1373 | /* send any buffered data */ |
1374 | cypress_send(port); | |
1375 | } | |
1376 | ||
1377 | ||
1da177e4 LT |
1378 | /***************************************************************************** |
1379 | * Module functions | |
1380 | *****************************************************************************/ | |
1381 | ||
1382 | static int __init cypress_init(void) | |
1383 | { | |
1384 | int retval; | |
813a224f | 1385 | |
441b62c1 | 1386 | dbg("%s", __func__); |
813a224f | 1387 | |
1da177e4 LT |
1388 | retval = usb_serial_register(&cypress_earthmate_device); |
1389 | if (retval) | |
1390 | goto failed_em_register; | |
1391 | retval = usb_serial_register(&cypress_hidcom_device); | |
1392 | if (retval) | |
1393 | goto failed_hidcom_register; | |
a5c44e29 LM |
1394 | retval = usb_serial_register(&cypress_ca42v2_device); |
1395 | if (retval) | |
1396 | goto failed_ca42v2_register; | |
1da177e4 LT |
1397 | retval = usb_register(&cypress_driver); |
1398 | if (retval) | |
1399 | goto failed_usb_register; | |
1400 | ||
c197a8db GKH |
1401 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1402 | DRIVER_DESC "\n"); | |
1da177e4 | 1403 | return 0; |
2e46b748 | 1404 | |
1da177e4 | 1405 | failed_usb_register: |
a5c44e29 | 1406 | usb_serial_deregister(&cypress_ca42v2_device); |
2e46b748 | 1407 | failed_ca42v2_register: |
1da177e4 | 1408 | usb_serial_deregister(&cypress_hidcom_device); |
2e46b748 | 1409 | failed_hidcom_register: |
1da177e4 | 1410 | usb_serial_deregister(&cypress_earthmate_device); |
2e46b748 | 1411 | failed_em_register: |
1da177e4 LT |
1412 | return retval; |
1413 | } | |
1414 | ||
1415 | ||
813a224f | 1416 | static void __exit cypress_exit(void) |
1da177e4 | 1417 | { |
441b62c1 | 1418 | dbg("%s", __func__); |
1da177e4 | 1419 | |
813a224f AC |
1420 | usb_deregister(&cypress_driver); |
1421 | usb_serial_deregister(&cypress_earthmate_device); | |
1422 | usb_serial_deregister(&cypress_hidcom_device); | |
1423 | usb_serial_deregister(&cypress_ca42v2_device); | |
1da177e4 LT |
1424 | } |
1425 | ||
1426 | ||
1427 | module_init(cypress_init); | |
1428 | module_exit(cypress_exit); | |
1429 | ||
813a224f AC |
1430 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1431 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1432 | MODULE_VERSION(DRIVER_VERSION); | |
1da177e4 LT |
1433 | MODULE_LICENSE("GPL"); |
1434 | ||
1435 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1436 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1437 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1438 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1439 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1440 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); | |
c312659c MF |
1441 | module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR); |
1442 | MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates"); |