Commit | Line | Data |
---|---|---|
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. | |
1da177e4 LT |
19 | */ |
20 | ||
813a224f AC |
21 | /* Thanks to Neil Whelchel for writing the first cypress m8 implementation |
22 | for linux. */ | |
1da177e4 LT |
23 | /* Thanks to cypress for providing references for the hid reports. */ |
24 | /* Thanks to Jiang Zhang for providing links and for general help. */ | |
813a224f | 25 | /* Code originates and was built up from ftdi_sio, belkin, pl2303 and others.*/ |
1da177e4 LT |
26 | |
27 | ||
1da177e4 LT |
28 | #include <linux/kernel.h> |
29 | #include <linux/errno.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/tty.h> | |
33 | #include <linux/tty_driver.h> | |
34 | #include <linux/tty_flip.h> | |
35 | #include <linux/module.h> | |
36 | #include <linux/moduleparam.h> | |
37 | #include <linux/spinlock.h> | |
38 | #include <linux/usb.h> | |
a969888c | 39 | #include <linux/usb/serial.h> |
1da177e4 | 40 | #include <linux/serial.h> |
117fb8d0 | 41 | #include <linux/kfifo.h> |
1da177e4 | 42 | #include <linux/delay.h> |
813a224f | 43 | #include <linux/uaccess.h> |
0f2c2d7b | 44 | #include <asm/unaligned.h> |
1da177e4 | 45 | |
1da177e4 LT |
46 | #include "cypress_m8.h" |
47 | ||
48 | ||
64319dd7 | 49 | static int debug; |
1da177e4 | 50 | static int stats; |
3cb4a4f7 | 51 | static int interval; |
c312659c | 52 | static int unstable_bauds; |
1da177e4 LT |
53 | |
54 | /* | |
55 | * Version Information | |
56 | */ | |
117fb8d0 | 57 | #define DRIVER_VERSION "v1.10" |
1da177e4 LT |
58 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
59 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
60 | ||
61 | /* write buffer size defines */ | |
62 | #define CYPRESS_BUF_SIZE 1024 | |
1da177e4 | 63 | |
7d40d7e8 | 64 | static const struct usb_device_id id_table_earthmate[] = { |
1da177e4 | 65 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 66 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
67 | { } /* Terminating entry */ |
68 | }; | |
69 | ||
7d40d7e8 | 70 | static const struct usb_device_id id_table_cyphidcomrs232[] = { |
1da177e4 | 71 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 72 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
1da177e4 LT |
73 | { } /* Terminating entry */ |
74 | }; | |
75 | ||
7d40d7e8 | 76 | static const struct usb_device_id id_table_nokiaca42v2[] = { |
a5c44e29 LM |
77 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
78 | { } /* Terminating entry */ | |
79 | }; | |
80 | ||
7d40d7e8 | 81 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 | 82 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 83 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 84 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 85 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
a5c44e29 | 86 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
87 | { } /* Terminating entry */ |
88 | }; | |
89 | ||
813a224f | 90 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
91 | |
92 | static struct usb_driver cypress_driver = { | |
93 | .name = "cypress", | |
94 | .probe = usb_serial_probe, | |
95 | .disconnect = usb_serial_disconnect, | |
96 | .id_table = id_table_combined, | |
ba9dc657 | 97 | .no_dynamic_id = 1, |
1da177e4 LT |
98 | }; |
99 | ||
3416eaa1 MI |
100 | enum packet_format { |
101 | packet_format_1, /* b0:status, b1:payload count */ | |
102 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
103 | }; | |
104 | ||
1da177e4 LT |
105 | struct cypress_private { |
106 | spinlock_t lock; /* private lock */ | |
107 | int chiptype; /* identifier of device, for quirks/etc */ | |
108 | int bytes_in; /* used for statistics */ | |
109 | int bytes_out; /* used for statistics */ | |
110 | int cmd_count; /* used for statistics */ | |
111 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
117fb8d0 | 112 | struct kfifo write_fifo; /* write fifo */ |
1da177e4 | 113 | int write_urb_in_use; /* write urb in use indicator */ |
0257fa9f MI |
114 | int write_urb_interval; /* interval to use for write urb */ |
115 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 116 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
117 | int termios_initialized; |
118 | __u8 line_control; /* holds dtr / rts value */ | |
119 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
120 | __u8 current_config; /* stores the current configuration byte */ | |
121 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 122 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 123 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
124 | int baud_rate; /* stores current baud rate in |
125 | integer form */ | |
1da177e4 LT |
126 | int isthrottled; /* if throttled, discard reads */ |
127 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
128 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
3ad2f3fb | 129 | /* we pass a pointer to this as the argument sent to |
813a224f | 130 | cypress_set_termios old_termios */ |
606d099c | 131 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
132 | }; |
133 | ||
1da177e4 | 134 | /* function prototypes for the Cypress USB to serial device */ |
813a224f AC |
135 | static int cypress_earthmate_startup(struct usb_serial *serial); |
136 | static int cypress_hidcom_startup(struct usb_serial *serial); | |
137 | static int cypress_ca42v2_startup(struct usb_serial *serial); | |
f9c99bb8 | 138 | static void cypress_release(struct usb_serial *serial); |
a509a7e4 | 139 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
140 | static void cypress_close(struct usb_serial_port *port); |
141 | static void cypress_dtr_rts(struct usb_serial_port *port, int on); | |
813a224f AC |
142 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
143 | const unsigned char *buf, int count); | |
144 | static void cypress_send(struct usb_serial_port *port); | |
145 | static int cypress_write_room(struct tty_struct *tty); | |
00a0d0d6 | 146 | static int cypress_ioctl(struct tty_struct *tty, |
813a224f AC |
147 | unsigned int cmd, unsigned long arg); |
148 | static void cypress_set_termios(struct tty_struct *tty, | |
149 | struct usb_serial_port *port, struct ktermios *old); | |
60b33c13 | 150 | static int cypress_tiocmget(struct tty_struct *tty); |
20b9d177 | 151 | static int cypress_tiocmset(struct tty_struct *tty, |
813a224f AC |
152 | unsigned int set, unsigned int clear); |
153 | static int cypress_chars_in_buffer(struct tty_struct *tty); | |
154 | static void cypress_throttle(struct tty_struct *tty); | |
155 | static void cypress_unthrottle(struct tty_struct *tty); | |
156 | static void cypress_set_dead(struct usb_serial_port *port); | |
157 | static void cypress_read_int_callback(struct urb *urb); | |
158 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 | 159 | |
ea65370d | 160 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
161 | .driver = { |
162 | .owner = THIS_MODULE, | |
269bda1c | 163 | .name = "earthmate", |
18fcac35 | 164 | }, |
269bda1c | 165 | .description = "DeLorme Earthmate USB", |
d9b1b787 | 166 | .usb_driver = &cypress_driver, |
1da177e4 | 167 | .id_table = id_table_earthmate, |
1da177e4 LT |
168 | .num_ports = 1, |
169 | .attach = cypress_earthmate_startup, | |
f9c99bb8 | 170 | .release = cypress_release, |
1da177e4 LT |
171 | .open = cypress_open, |
172 | .close = cypress_close, | |
335f8514 | 173 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
174 | .write = cypress_write, |
175 | .write_room = cypress_write_room, | |
176 | .ioctl = cypress_ioctl, | |
177 | .set_termios = cypress_set_termios, | |
178 | .tiocmget = cypress_tiocmget, | |
179 | .tiocmset = cypress_tiocmset, | |
180 | .chars_in_buffer = cypress_chars_in_buffer, | |
181 | .throttle = cypress_throttle, | |
182 | .unthrottle = cypress_unthrottle, | |
183 | .read_int_callback = cypress_read_int_callback, | |
184 | .write_int_callback = cypress_write_int_callback, | |
185 | }; | |
186 | ||
ea65370d | 187 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
188 | .driver = { |
189 | .owner = THIS_MODULE, | |
269bda1c | 190 | .name = "cyphidcom", |
18fcac35 | 191 | }, |
269bda1c | 192 | .description = "HID->COM RS232 Adapter", |
d9b1b787 | 193 | .usb_driver = &cypress_driver, |
1da177e4 | 194 | .id_table = id_table_cyphidcomrs232, |
1da177e4 LT |
195 | .num_ports = 1, |
196 | .attach = cypress_hidcom_startup, | |
f9c99bb8 | 197 | .release = cypress_release, |
1da177e4 LT |
198 | .open = cypress_open, |
199 | .close = cypress_close, | |
335f8514 | 200 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
201 | .write = cypress_write, |
202 | .write_room = cypress_write_room, | |
203 | .ioctl = cypress_ioctl, | |
204 | .set_termios = cypress_set_termios, | |
205 | .tiocmget = cypress_tiocmget, | |
206 | .tiocmset = cypress_tiocmset, | |
207 | .chars_in_buffer = cypress_chars_in_buffer, | |
208 | .throttle = cypress_throttle, | |
209 | .unthrottle = cypress_unthrottle, | |
210 | .read_int_callback = cypress_read_int_callback, | |
211 | .write_int_callback = cypress_write_int_callback, | |
212 | }; | |
213 | ||
a5c44e29 LM |
214 | static struct usb_serial_driver cypress_ca42v2_device = { |
215 | .driver = { | |
216 | .owner = THIS_MODULE, | |
813a224f | 217 | .name = "nokiaca42v2", |
a5c44e29 LM |
218 | }, |
219 | .description = "Nokia CA-42 V2 Adapter", | |
d9b1b787 | 220 | .usb_driver = &cypress_driver, |
a5c44e29 | 221 | .id_table = id_table_nokiaca42v2, |
a5c44e29 LM |
222 | .num_ports = 1, |
223 | .attach = cypress_ca42v2_startup, | |
f9c99bb8 | 224 | .release = cypress_release, |
a5c44e29 LM |
225 | .open = cypress_open, |
226 | .close = cypress_close, | |
335f8514 | 227 | .dtr_rts = cypress_dtr_rts, |
a5c44e29 LM |
228 | .write = cypress_write, |
229 | .write_room = cypress_write_room, | |
230 | .ioctl = cypress_ioctl, | |
231 | .set_termios = cypress_set_termios, | |
232 | .tiocmget = cypress_tiocmget, | |
233 | .tiocmset = cypress_tiocmset, | |
234 | .chars_in_buffer = cypress_chars_in_buffer, | |
235 | .throttle = cypress_throttle, | |
236 | .unthrottle = cypress_unthrottle, | |
237 | .read_int_callback = cypress_read_int_callback, | |
238 | .write_int_callback = cypress_write_int_callback, | |
239 | }; | |
1da177e4 LT |
240 | |
241 | /***************************************************************************** | |
242 | * Cypress serial helper functions | |
243 | *****************************************************************************/ | |
244 | ||
245 | ||
8873aaa6 | 246 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 247 | { |
92983c21 MI |
248 | struct cypress_private *priv; |
249 | priv = usb_get_serial_port_data(port); | |
250 | ||
c312659c MF |
251 | if (unstable_bauds) |
252 | return new_rate; | |
253 | ||
92983c21 MI |
254 | /* |
255 | * The general purpose firmware for the Cypress M8 allows for | |
256 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
257 | * chose to use the general purpose firmware or not), if you | |
258 | * need to modify this speed setting for your own project | |
259 | * please add your own chiptype and modify the code likewise. | |
260 | * The Cypress HID->COM device will work successfully up to | |
261 | * 115200bps (but the actual throughput is around 3kBps). | |
262 | */ | |
92983c21 MI |
263 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
264 | /* | |
265 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
266 | * Cypress app note that describes this mechanism | |
267 | * states the the low-speed part can't handle more | |
268 | * than 800 bytes/sec, in which case 4800 baud is the | |
269 | * safest speed for a part like that. | |
270 | */ | |
271 | if (new_rate > 4800) { | |
272 | dbg("%s - failed setting baud rate, device incapable " | |
273 | "speed %d", __func__, new_rate); | |
274 | return -1; | |
275 | } | |
276 | } | |
277 | switch (priv->chiptype) { | |
278 | case CT_EARTHMATE: | |
279 | if (new_rate <= 600) { | |
280 | /* 300 and 600 baud rates are supported under | |
281 | * the generic firmware, but are not used with | |
282 | * NMEA and SiRF protocols */ | |
283 | dbg("%s - failed setting baud rate, unsupported speed " | |
284 | "of %d on Earthmate GPS", __func__, new_rate); | |
285 | return -1; | |
286 | } | |
287 | break; | |
288 | default: | |
289 | break; | |
290 | } | |
291 | return new_rate; | |
292 | } | |
293 | ||
294 | ||
093cf723 | 295 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 296 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
297 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
298 | int stop_bits, int parity_enable, int parity_type, int reset, | |
299 | int cypress_request_type) | |
1da177e4 | 300 | { |
3cb4a4f7 | 301 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 302 | struct cypress_private *priv; |
0954644b JH |
303 | u8 *feature_buffer; |
304 | const unsigned int feature_len = 5; | |
1da177e4 LT |
305 | unsigned long flags; |
306 | ||
441b62c1 | 307 | dbg("%s", __func__); |
813a224f | 308 | |
1da177e4 LT |
309 | priv = usb_get_serial_port_data(port); |
310 | ||
78aef519 MI |
311 | if (!priv->comm_is_ok) |
312 | return -ENODEV; | |
313 | ||
0954644b JH |
314 | feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL); |
315 | if (!feature_buffer) | |
316 | return -ENOMEM; | |
317 | ||
813a224f AC |
318 | switch (cypress_request_type) { |
319 | case CYPRESS_SET_CONFIG: | |
813a224f | 320 | /* 0 means 'Hang up' so doesn't change the true bit rate */ |
2805eb13 MF |
321 | new_baudrate = priv->baud_rate; |
322 | if (baud_rate && baud_rate != priv->baud_rate) { | |
813a224f AC |
323 | dbg("%s - baud rate is changing", __func__); |
324 | retval = analyze_baud_rate(port, baud_rate); | |
2805eb13 | 325 | if (retval >= 0) { |
813a224f AC |
326 | new_baudrate = retval; |
327 | dbg("%s - New baud rate set to %d", | |
328 | __func__, new_baudrate); | |
1da177e4 | 329 | } |
813a224f AC |
330 | } |
331 | dbg("%s - baud rate is being sent as %d", | |
332 | __func__, new_baudrate); | |
333 | ||
813a224f | 334 | /* fill the feature_buffer with new configuration */ |
0f2c2d7b | 335 | put_unaligned_le32(new_baudrate, feature_buffer); |
813a224f AC |
336 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
337 | /* 1 bit gap */ | |
338 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
339 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
340 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
341 | /* 1 bit gap */ | |
342 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
343 | ||
344 | dbg("%s - device is being sent this feature report:", | |
345 | __func__); | |
346 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __func__, | |
347 | feature_buffer[0], feature_buffer[1], | |
348 | feature_buffer[2], feature_buffer[3], | |
349 | feature_buffer[4]); | |
350 | ||
351 | do { | |
352 | retval = usb_control_msg(port->serial->dev, | |
353 | usb_sndctrlpipe(port->serial->dev, 0), | |
354 | HID_REQ_SET_REPORT, | |
355 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
356 | 0x0300, 0, feature_buffer, | |
0954644b | 357 | feature_len, 500); |
813a224f AC |
358 | |
359 | if (tries++ >= 3) | |
360 | break; | |
361 | ||
0954644b | 362 | } while (retval != feature_len && |
813a224f AC |
363 | retval != -ENODEV); |
364 | ||
0954644b | 365 | if (retval != feature_len) { |
194343d9 GKH |
366 | dev_err(&port->dev, "%s - failed sending serial " |
367 | "line settings - %d\n", __func__, retval); | |
813a224f AC |
368 | cypress_set_dead(port); |
369 | } else { | |
370 | spin_lock_irqsave(&priv->lock, flags); | |
371 | priv->baud_rate = new_baudrate; | |
372 | priv->current_config = feature_buffer[4]; | |
373 | spin_unlock_irqrestore(&priv->lock, flags); | |
374 | /* If we asked for a speed change encode it */ | |
375 | if (baud_rate) | |
376 | tty_encode_baud_rate(tty, | |
377 | new_baudrate, new_baudrate); | |
378 | } | |
379 | break; | |
380 | case CYPRESS_GET_CONFIG: | |
381 | if (priv->get_cfg_unsafe) { | |
382 | /* Not implemented for this device, | |
383 | and if we try to do it we're likely | |
384 | to crash the hardware. */ | |
0954644b JH |
385 | retval = -ENOTTY; |
386 | goto out; | |
813a224f AC |
387 | } |
388 | dbg("%s - retreiving serial line settings", __func__); | |
813a224f AC |
389 | do { |
390 | retval = usb_control_msg(port->serial->dev, | |
391 | usb_rcvctrlpipe(port->serial->dev, 0), | |
392 | HID_REQ_GET_REPORT, | |
393 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
394 | 0x0300, 0, feature_buffer, | |
0954644b | 395 | feature_len, 500); |
813a224f AC |
396 | |
397 | if (tries++ >= 3) | |
398 | break; | |
0954644b | 399 | } while (retval != feature_len |
813a224f AC |
400 | && retval != -ENODEV); |
401 | ||
0954644b | 402 | if (retval != feature_len) { |
194343d9 GKH |
403 | dev_err(&port->dev, "%s - failed to retrieve serial " |
404 | "line settings - %d\n", __func__, retval); | |
813a224f | 405 | cypress_set_dead(port); |
0954644b | 406 | goto out; |
813a224f AC |
407 | } else { |
408 | spin_lock_irqsave(&priv->lock, flags); | |
409 | /* store the config in one byte, and later | |
410 | use bit masks to check values */ | |
411 | priv->current_config = feature_buffer[4]; | |
0f2c2d7b | 412 | priv->baud_rate = get_unaligned_le32(feature_buffer); |
813a224f AC |
413 | spin_unlock_irqrestore(&priv->lock, flags); |
414 | } | |
1da177e4 | 415 | } |
3cb4a4f7 LM |
416 | spin_lock_irqsave(&priv->lock, flags); |
417 | ++priv->cmd_count; | |
418 | spin_unlock_irqrestore(&priv->lock, flags); | |
0954644b JH |
419 | out: |
420 | kfree(feature_buffer); | |
1da177e4 LT |
421 | return retval; |
422 | } /* cypress_serial_control */ | |
423 | ||
424 | ||
78aef519 MI |
425 | static void cypress_set_dead(struct usb_serial_port *port) |
426 | { | |
427 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
428 | unsigned long flags; | |
429 | ||
430 | spin_lock_irqsave(&priv->lock, flags); | |
431 | if (!priv->comm_is_ok) { | |
432 | spin_unlock_irqrestore(&priv->lock, flags); | |
433 | return; | |
434 | } | |
435 | priv->comm_is_ok = 0; | |
436 | spin_unlock_irqrestore(&priv->lock, flags); | |
437 | ||
194343d9 GKH |
438 | dev_err(&port->dev, "cypress_m8 suspending failing port %d - " |
439 | "interval might be too short\n", port->number); | |
78aef519 MI |
440 | } |
441 | ||
442 | ||
1da177e4 LT |
443 | /***************************************************************************** |
444 | * Cypress serial driver functions | |
445 | *****************************************************************************/ | |
446 | ||
447 | ||
813a224f | 448 | static int generic_startup(struct usb_serial *serial) |
1da177e4 LT |
449 | { |
450 | struct cypress_private *priv; | |
0257fa9f | 451 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 452 | |
441b62c1 | 453 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 454 | |
813a224f | 455 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
456 | if (!priv) |
457 | return -ENOMEM; | |
458 | ||
78aef519 | 459 | priv->comm_is_ok = !0; |
1da177e4 | 460 | spin_lock_init(&priv->lock); |
117fb8d0 | 461 | if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) { |
1da177e4 LT |
462 | kfree(priv); |
463 | return -ENOMEM; | |
464 | } | |
465 | init_waitqueue_head(&priv->delta_msr_wait); | |
813a224f AC |
466 | |
467 | usb_reset_configuration(serial->dev); | |
468 | ||
1da177e4 LT |
469 | priv->cmd_ctrl = 0; |
470 | priv->line_control = 0; | |
471 | priv->termios_initialized = 0; | |
1da177e4 | 472 | priv->rx_flags = 0; |
3416eaa1 MI |
473 | /* Default packet format setting is determined by packet size. |
474 | Anything with a size larger then 9 must have a separate | |
475 | count field since the 3 bit count field is otherwise too | |
476 | small. Otherwise we can use the slightly more compact | |
477 | format. This is in accordance with the cypress_m8 serial | |
478 | converter app note. */ | |
813a224f | 479 | if (port->interrupt_out_size > 9) |
3416eaa1 | 480 | priv->pkt_fmt = packet_format_1; |
813a224f | 481 | else |
3416eaa1 | 482 | priv->pkt_fmt = packet_format_2; |
813a224f | 483 | |
0257fa9f MI |
484 | if (interval > 0) { |
485 | priv->write_urb_interval = interval; | |
486 | priv->read_urb_interval = interval; | |
487 | dbg("%s - port %d read & write intervals forced to %d", | |
813a224f | 488 | __func__, port->number, interval); |
0257fa9f MI |
489 | } else { |
490 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
491 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
492 | dbg("%s - port %d intervals: read=%d write=%d", | |
813a224f AC |
493 | __func__, port->number, |
494 | priv->read_urb_interval, priv->write_urb_interval); | |
0257fa9f MI |
495 | } |
496 | usb_set_serial_port_data(port, priv); | |
813a224f | 497 | |
b9db07fb LM |
498 | return 0; |
499 | } | |
1da177e4 LT |
500 | |
501 | ||
813a224f | 502 | static int cypress_earthmate_startup(struct usb_serial *serial) |
1da177e4 LT |
503 | { |
504 | struct cypress_private *priv; | |
3d6aa320 | 505 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 506 | |
441b62c1 | 507 | dbg("%s", __func__); |
1da177e4 LT |
508 | |
509 | if (generic_startup(serial)) { | |
441b62c1 | 510 | dbg("%s - Failed setting up port %d", __func__, |
3d6aa320 | 511 | port->number); |
1da177e4 LT |
512 | return 1; |
513 | } | |
514 | ||
3d6aa320 | 515 | priv = usb_get_serial_port_data(port); |
1da177e4 | 516 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
517 | /* All Earthmate devices use the separated-count packet |
518 | format! Idiotic. */ | |
519 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
520 | if (serial->dev->descriptor.idProduct != |
521 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
522 | /* The old original USB Earthmate seemed able to |
523 | handle GET_CONFIG requests; everything they've | |
524 | produced since that time crashes if this command is | |
525 | attempted :-( */ | |
526 | dbg("%s - Marking this device as unsafe for GET_CONFIG " | |
527 | "commands", __func__); | |
528 | priv->get_cfg_unsafe = !0; | |
529 | } | |
b9db07fb LM |
530 | |
531 | return 0; | |
1da177e4 LT |
532 | } /* cypress_earthmate_startup */ |
533 | ||
534 | ||
813a224f | 535 | static int cypress_hidcom_startup(struct usb_serial *serial) |
1da177e4 LT |
536 | { |
537 | struct cypress_private *priv; | |
538 | ||
441b62c1 | 539 | dbg("%s", __func__); |
1da177e4 LT |
540 | |
541 | if (generic_startup(serial)) { | |
441b62c1 | 542 | dbg("%s - Failed setting up port %d", __func__, |
b9db07fb | 543 | serial->port[0]->number); |
1da177e4 LT |
544 | return 1; |
545 | } | |
546 | ||
547 | priv = usb_get_serial_port_data(serial->port[0]); | |
548 | priv->chiptype = CT_CYPHIDCOM; | |
813a224f | 549 | |
b9db07fb | 550 | return 0; |
1da177e4 LT |
551 | } /* cypress_hidcom_startup */ |
552 | ||
553 | ||
813a224f | 554 | static int cypress_ca42v2_startup(struct usb_serial *serial) |
a5c44e29 LM |
555 | { |
556 | struct cypress_private *priv; | |
557 | ||
441b62c1 | 558 | dbg("%s", __func__); |
a5c44e29 LM |
559 | |
560 | if (generic_startup(serial)) { | |
441b62c1 | 561 | dbg("%s - Failed setting up port %d", __func__, |
a5c44e29 LM |
562 | serial->port[0]->number); |
563 | return 1; | |
564 | } | |
565 | ||
566 | priv = usb_get_serial_port_data(serial->port[0]); | |
567 | priv->chiptype = CT_CA42V2; | |
568 | ||
569 | return 0; | |
570 | } /* cypress_ca42v2_startup */ | |
571 | ||
572 | ||
f9c99bb8 | 573 | static void cypress_release(struct usb_serial *serial) |
1da177e4 LT |
574 | { |
575 | struct cypress_private *priv; | |
576 | ||
813a224f | 577 | dbg("%s - port %d", __func__, serial->port[0]->number); |
1da177e4 LT |
578 | |
579 | /* all open ports are closed at this point */ | |
580 | ||
581 | priv = usb_get_serial_port_data(serial->port[0]); | |
582 | ||
583 | if (priv) { | |
117fb8d0 | 584 | kfifo_free(&priv->write_fifo); |
1da177e4 | 585 | kfree(priv); |
1da177e4 LT |
586 | } |
587 | } | |
588 | ||
589 | ||
a509a7e4 | 590 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
591 | { |
592 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
593 | struct usb_serial *serial = port->serial; | |
594 | unsigned long flags; | |
595 | int result = 0; | |
596 | ||
441b62c1 | 597 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 598 | |
78aef519 MI |
599 | if (!priv->comm_is_ok) |
600 | return -EIO; | |
601 | ||
1da177e4 | 602 | /* clear halts before open */ |
1da177e4 LT |
603 | usb_clear_halt(serial->dev, 0x81); |
604 | usb_clear_halt(serial->dev, 0x02); | |
605 | ||
606 | spin_lock_irqsave(&priv->lock, flags); | |
607 | /* reset read/write statistics */ | |
608 | priv->bytes_in = 0; | |
609 | priv->bytes_out = 0; | |
610 | priv->cmd_count = 0; | |
611 | priv->rx_flags = 0; | |
612 | spin_unlock_irqrestore(&priv->lock, flags); | |
613 | ||
335f8514 | 614 | /* Set termios */ |
fe1ae7fd | 615 | cypress_send(port); |
1da177e4 | 616 | |
95da310e AC |
617 | if (tty) |
618 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
619 | |
620 | /* setup the port and start reading from the device */ | |
813a224f | 621 | if (!port->interrupt_in_urb) { |
194343d9 GKH |
622 | dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n", |
623 | __func__); | |
813a224f | 624 | return -1; |
1da177e4 LT |
625 | } |
626 | ||
627 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
628 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
629 | port->interrupt_in_urb->transfer_buffer, |
630 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 631 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
632 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
633 | ||
813a224f AC |
634 | if (result) { |
635 | dev_err(&port->dev, | |
636 | "%s - failed submitting read urb, error %d\n", | |
637 | __func__, result); | |
78aef519 | 638 | cypress_set_dead(port); |
1da177e4 | 639 | } |
335f8514 | 640 | port->port.drain_delay = 256; |
1da177e4 LT |
641 | return result; |
642 | } /* cypress_open */ | |
643 | ||
335f8514 AC |
644 | static void cypress_dtr_rts(struct usb_serial_port *port, int on) |
645 | { | |
646 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
647 | /* drop dtr and rts */ | |
335f8514 AC |
648 | spin_lock_irq(&priv->lock); |
649 | if (on == 0) | |
650 | priv->line_control = 0; | |
651 | else | |
652 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
653 | priv->cmd_ctrl = 1; | |
654 | spin_unlock_irq(&priv->lock); | |
655 | cypress_write(NULL, port, NULL, 0); | |
656 | } | |
1da177e4 | 657 | |
335f8514 | 658 | static void cypress_close(struct usb_serial_port *port) |
1da177e4 LT |
659 | { |
660 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
117fb8d0 | 661 | unsigned long flags; |
1da177e4 | 662 | |
441b62c1 | 663 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 664 | |
9e3b1d8e ON |
665 | /* writing is potentially harmful, lock must be taken */ |
666 | mutex_lock(&port->serial->disc_mutex); | |
667 | if (port->serial->disconnected) { | |
668 | mutex_unlock(&port->serial->disc_mutex); | |
669 | return; | |
670 | } | |
117fb8d0 JH |
671 | spin_lock_irqsave(&priv->lock, flags); |
672 | kfifo_reset_out(&priv->write_fifo); | |
673 | spin_unlock_irqrestore(&priv->lock, flags); | |
674 | ||
441b62c1 | 675 | dbg("%s - stopping urbs", __func__); |
813a224f AC |
676 | usb_kill_urb(port->interrupt_in_urb); |
677 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 678 | |
1da177e4 | 679 | if (stats) |
813a224f AC |
680 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
681 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
9e3b1d8e | 682 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
683 | } /* cypress_close */ |
684 | ||
685 | ||
95da310e AC |
686 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
687 | const unsigned char *buf, int count) | |
1da177e4 LT |
688 | { |
689 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
813a224f | 690 | |
441b62c1 | 691 | dbg("%s - port %d, %d bytes", __func__, port->number, count); |
1da177e4 LT |
692 | |
693 | /* line control commands, which need to be executed immediately, | |
694 | are not put into the buffer for obvious reasons. | |
695 | */ | |
696 | if (priv->cmd_ctrl) { | |
697 | count = 0; | |
698 | goto finish; | |
699 | } | |
813a224f | 700 | |
1da177e4 LT |
701 | if (!count) |
702 | return count; | |
813a224f | 703 | |
117fb8d0 | 704 | count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock); |
1da177e4 LT |
705 | |
706 | finish: | |
707 | cypress_send(port); | |
708 | ||
709 | return count; | |
710 | } /* cypress_write */ | |
711 | ||
712 | ||
713 | static void cypress_send(struct usb_serial_port *port) | |
714 | { | |
715 | int count = 0, result, offset, actual_size; | |
716 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
717 | unsigned long flags; | |
813a224f | 718 | |
78aef519 MI |
719 | if (!priv->comm_is_ok) |
720 | return; | |
721 | ||
441b62c1 | 722 | dbg("%s - port %d", __func__, port->number); |
813a224f AC |
723 | dbg("%s - interrupt out size is %d", __func__, |
724 | port->interrupt_out_size); | |
725 | ||
1da177e4 LT |
726 | spin_lock_irqsave(&priv->lock, flags); |
727 | if (priv->write_urb_in_use) { | |
441b62c1 | 728 | dbg("%s - can't write, urb in use", __func__); |
1da177e4 LT |
729 | spin_unlock_irqrestore(&priv->lock, flags); |
730 | return; | |
731 | } | |
732 | spin_unlock_irqrestore(&priv->lock, flags); | |
733 | ||
734 | /* clear buffer */ | |
813a224f AC |
735 | memset(port->interrupt_out_urb->transfer_buffer, 0, |
736 | port->interrupt_out_size); | |
1da177e4 LT |
737 | |
738 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
739 | switch (priv->pkt_fmt) { |
740 | default: | |
741 | case packet_format_1: | |
742 | /* this is for the CY7C64013... */ | |
743 | offset = 2; | |
744 | port->interrupt_out_buffer[0] = priv->line_control; | |
745 | break; | |
746 | case packet_format_2: | |
747 | /* this is for the CY7C63743... */ | |
748 | offset = 1; | |
749 | port->interrupt_out_buffer[0] = priv->line_control; | |
750 | break; | |
1da177e4 LT |
751 | } |
752 | ||
753 | if (priv->line_control & CONTROL_RESET) | |
754 | priv->line_control &= ~CONTROL_RESET; | |
755 | ||
756 | if (priv->cmd_ctrl) { | |
757 | priv->cmd_count++; | |
441b62c1 | 758 | dbg("%s - line control command being issued", __func__); |
1da177e4 LT |
759 | spin_unlock_irqrestore(&priv->lock, flags); |
760 | goto send; | |
761 | } else | |
762 | spin_unlock_irqrestore(&priv->lock, flags); | |
763 | ||
117fb8d0 JH |
764 | count = kfifo_out_locked(&priv->write_fifo, |
765 | &port->interrupt_out_buffer[offset], | |
766 | port->interrupt_out_size - offset, | |
767 | &priv->lock); | |
813a224f | 768 | if (count == 0) |
1da177e4 | 769 | return; |
1da177e4 | 770 | |
3416eaa1 MI |
771 | switch (priv->pkt_fmt) { |
772 | default: | |
773 | case packet_format_1: | |
774 | port->interrupt_out_buffer[1] = count; | |
775 | break; | |
776 | case packet_format_2: | |
777 | port->interrupt_out_buffer[0] |= count; | |
1da177e4 LT |
778 | } |
779 | ||
441b62c1 | 780 | dbg("%s - count is %d", __func__, count); |
1da177e4 LT |
781 | |
782 | send: | |
783 | spin_lock_irqsave(&priv->lock, flags); | |
784 | priv->write_urb_in_use = 1; | |
785 | spin_unlock_irqrestore(&priv->lock, flags); | |
786 | ||
787 | if (priv->cmd_ctrl) | |
788 | actual_size = 1; | |
789 | else | |
3416eaa1 MI |
790 | actual_size = count + |
791 | (priv->pkt_fmt == packet_format_1 ? 2 : 1); | |
792 | ||
813a224f AC |
793 | usb_serial_debug_data(debug, &port->dev, __func__, |
794 | port->interrupt_out_size, | |
795 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 796 | |
9aa8dae7 MI |
797 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
798 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
799 | port->interrupt_out_buffer, port->interrupt_out_size, | |
800 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 801 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 802 | if (result) { |
813a224f AC |
803 | dev_err(&port->dev, |
804 | "%s - failed submitting write urb, error %d\n", | |
805 | __func__, result); | |
1da177e4 | 806 | priv->write_urb_in_use = 0; |
78aef519 | 807 | cypress_set_dead(port); |
1da177e4 LT |
808 | } |
809 | ||
810 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 811 | if (priv->cmd_ctrl) |
1da177e4 | 812 | priv->cmd_ctrl = 0; |
813a224f AC |
813 | |
814 | /* do not count the line control and size bytes */ | |
815 | priv->bytes_out += count; | |
1da177e4 LT |
816 | spin_unlock_irqrestore(&priv->lock, flags); |
817 | ||
cf2c7481 | 818 | usb_serial_port_softint(port); |
1da177e4 LT |
819 | } /* cypress_send */ |
820 | ||
821 | ||
822 | /* returns how much space is available in the soft buffer */ | |
95da310e | 823 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 824 | { |
95da310e | 825 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
826 | struct cypress_private *priv = usb_get_serial_port_data(port); |
827 | int room = 0; | |
828 | unsigned long flags; | |
829 | ||
441b62c1 | 830 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
831 | |
832 | spin_lock_irqsave(&priv->lock, flags); | |
117fb8d0 | 833 | room = kfifo_avail(&priv->write_fifo); |
1da177e4 LT |
834 | spin_unlock_irqrestore(&priv->lock, flags); |
835 | ||
441b62c1 | 836 | dbg("%s - returns %d", __func__, room); |
1da177e4 LT |
837 | return room; |
838 | } | |
839 | ||
840 | ||
60b33c13 | 841 | static int cypress_tiocmget(struct tty_struct *tty) |
1da177e4 | 842 | { |
95da310e | 843 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
844 | struct cypress_private *priv = usb_get_serial_port_data(port); |
845 | __u8 status, control; | |
846 | unsigned int result = 0; | |
847 | unsigned long flags; | |
813a224f | 848 | |
441b62c1 | 849 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
850 | |
851 | spin_lock_irqsave(&priv->lock, flags); | |
852 | control = priv->line_control; | |
853 | status = priv->current_status; | |
854 | spin_unlock_irqrestore(&priv->lock, flags); | |
855 | ||
856 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
857 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
858 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
859 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
860 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
861 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
862 | ||
441b62c1 | 863 | dbg("%s - result = %x", __func__, result); |
1da177e4 LT |
864 | |
865 | return result; | |
866 | } | |
867 | ||
868 | ||
20b9d177 | 869 | static int cypress_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
870 | unsigned int set, unsigned int clear) |
871 | { | |
95da310e | 872 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
873 | struct cypress_private *priv = usb_get_serial_port_data(port); |
874 | unsigned long flags; | |
813a224f | 875 | |
441b62c1 | 876 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
877 | |
878 | spin_lock_irqsave(&priv->lock, flags); | |
879 | if (set & TIOCM_RTS) | |
880 | priv->line_control |= CONTROL_RTS; | |
881 | if (set & TIOCM_DTR) | |
882 | priv->line_control |= CONTROL_DTR; | |
883 | if (clear & TIOCM_RTS) | |
884 | priv->line_control &= ~CONTROL_RTS; | |
885 | if (clear & TIOCM_DTR) | |
886 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 887 | priv->cmd_ctrl = 1; |
1da177e4 LT |
888 | spin_unlock_irqrestore(&priv->lock, flags); |
889 | ||
95da310e | 890 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
891 | } |
892 | ||
893 | ||
00a0d0d6 | 894 | static int cypress_ioctl(struct tty_struct *tty, |
95da310e | 895 | unsigned int cmd, unsigned long arg) |
1da177e4 | 896 | { |
95da310e | 897 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
898 | struct cypress_private *priv = usb_get_serial_port_data(port); |
899 | ||
441b62c1 | 900 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 LT |
901 | |
902 | switch (cmd) { | |
813a224f AC |
903 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ |
904 | case TIOCMIWAIT: | |
905 | while (priv != NULL) { | |
906 | interruptible_sleep_on(&priv->delta_msr_wait); | |
907 | /* see if a signal did it */ | |
908 | if (signal_pending(current)) | |
909 | return -ERESTARTSYS; | |
910 | else { | |
911 | char diff = priv->diff_status; | |
912 | if (diff == 0) | |
913 | return -EIO; /* no change => error */ | |
914 | ||
915 | /* consume all events */ | |
916 | priv->diff_status = 0; | |
917 | ||
918 | /* return 0 if caller wanted to know about | |
919 | these bits */ | |
920 | if (((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
921 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
922 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
923 | ((arg & TIOCM_CTS) && (diff & UART_CTS))) | |
924 | return 0; | |
925 | /* otherwise caller can't care less about what | |
926 | * happened, and so we continue to wait for | |
927 | * more events. | |
928 | */ | |
1da177e4 | 929 | } |
813a224f AC |
930 | } |
931 | return 0; | |
932 | default: | |
933 | break; | |
1da177e4 | 934 | } |
441b62c1 | 935 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __func__, cmd); |
1da177e4 LT |
936 | return -ENOIOCTLCMD; |
937 | } /* cypress_ioctl */ | |
938 | ||
939 | ||
95da310e AC |
940 | static void cypress_set_termios(struct tty_struct *tty, |
941 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
942 | { |
943 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1da177e4 | 944 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 945 | unsigned cflag, iflag; |
1da177e4 LT |
946 | unsigned long flags; |
947 | __u8 oldlines; | |
3cb4a4f7 | 948 | int linechange = 0; |
b9db07fb | 949 | |
441b62c1 | 950 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 951 | |
1da177e4 | 952 | spin_lock_irqsave(&priv->lock, flags); |
fe1ae7fd AC |
953 | /* We can't clean this one up as we don't know the device type |
954 | early enough */ | |
1da177e4 LT |
955 | if (!priv->termios_initialized) { |
956 | if (priv->chiptype == CT_EARTHMATE) { | |
957 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
958 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
959 | CLOCAL; | |
8873aaa6 AC |
960 | tty->termios->c_ispeed = 4800; |
961 | tty->termios->c_ospeed = 4800; | |
1da177e4 LT |
962 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
963 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
964 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
965 | CLOCAL; | |
8873aaa6 AC |
966 | tty->termios->c_ispeed = 9600; |
967 | tty->termios->c_ospeed = 9600; | |
a5c44e29 LM |
968 | } else if (priv->chiptype == CT_CA42V2) { |
969 | *(tty->termios) = tty_std_termios; | |
970 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
971 | CLOCAL; | |
8873aaa6 AC |
972 | tty->termios->c_ispeed = 9600; |
973 | tty->termios->c_ospeed = 9600; | |
1da177e4 LT |
974 | } |
975 | priv->termios_initialized = 1; | |
976 | } | |
977 | spin_unlock_irqrestore(&priv->lock, flags); | |
978 | ||
8873aaa6 AC |
979 | /* Unsupported features need clearing */ |
980 | tty->termios->c_cflag &= ~(CMSPAR|CRTSCTS); | |
981 | ||
1da177e4 LT |
982 | cflag = tty->termios->c_cflag; |
983 | iflag = tty->termios->c_iflag; | |
984 | ||
985 | /* check if there are new settings */ | |
986 | if (old_termios) { | |
8873aaa6 AC |
987 | spin_lock_irqsave(&priv->lock, flags); |
988 | priv->tmp_termios = *(tty->termios); | |
989 | spin_unlock_irqrestore(&priv->lock, flags); | |
990 | } | |
1da177e4 LT |
991 | |
992 | /* set number of data bits, parity, stop bits */ | |
993 | /* when parity is disabled the parity type bit is ignored */ | |
994 | ||
b9db07fb LM |
995 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
996 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
997 | ||
1da177e4 LT |
998 | if (cflag & PARENB) { |
999 | parity_enable = 1; | |
b9db07fb LM |
1000 | /* 1 means odd parity, 0 means even parity */ |
1001 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
1002 | } else |
1003 | parity_enable = parity_type = 0; | |
1004 | ||
77336828 AC |
1005 | switch (cflag & CSIZE) { |
1006 | case CS5: | |
1007 | data_bits = 0; | |
1008 | break; | |
1009 | case CS6: | |
1010 | data_bits = 1; | |
1011 | break; | |
1012 | case CS7: | |
1013 | data_bits = 2; | |
1014 | break; | |
1015 | case CS8: | |
1da177e4 | 1016 | data_bits = 3; |
77336828 AC |
1017 | break; |
1018 | default: | |
194343d9 GKH |
1019 | dev_err(&port->dev, "%s - CSIZE was set, but not CS5-CS8\n", |
1020 | __func__); | |
77336828 AC |
1021 | data_bits = 3; |
1022 | } | |
1da177e4 LT |
1023 | spin_lock_irqsave(&priv->lock, flags); |
1024 | oldlines = priv->line_control; | |
1025 | if ((cflag & CBAUD) == B0) { | |
1026 | /* drop dtr and rts */ | |
441b62c1 | 1027 | dbg("%s - dropping the lines, baud rate 0bps", __func__); |
1da177e4 | 1028 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 1029 | } else |
3cb4a4f7 | 1030 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 1031 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1032 | |
b9db07fb | 1033 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, " |
441b62c1 | 1034 | "%d data_bits (+5)", __func__, stop_bits, |
b9db07fb LM |
1035 | parity_enable, parity_type, data_bits); |
1036 | ||
813a224f AC |
1037 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
1038 | data_bits, stop_bits, | |
1039 | parity_enable, parity_type, | |
1040 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1041 | |
b9db07fb LM |
1042 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1043 | * filled into the private structure this should confirm that all is | |
1044 | * working if it returns what we just set */ | |
95da310e | 1045 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 1046 | |
b9db07fb LM |
1047 | /* Here we can define custom tty settings for devices; the main tty |
1048 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1049 | |
b9db07fb | 1050 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 1051 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
b9db07fb LM |
1052 | dbg("Using custom termios settings for a baud rate of " |
1053 | "4800bps."); | |
1da177e4 LT |
1054 | /* define custom termios settings for NMEA protocol */ |
1055 | ||
1da177e4 | 1056 | tty->termios->c_iflag /* input modes - */ |
b9db07fb LM |
1057 | &= ~(IGNBRK /* disable ignore break */ |
1058 | | BRKINT /* disable break causes interrupt */ | |
1059 | | PARMRK /* disable mark parity errors */ | |
1060 | | ISTRIP /* disable clear high bit of input char */ | |
1061 | | INLCR /* disable translate NL to CR */ | |
1062 | | IGNCR /* disable ignore CR */ | |
1063 | | ICRNL /* disable translate CR to NL */ | |
1064 | | IXON); /* disable enable XON/XOFF flow control */ | |
1065 | ||
1da177e4 | 1066 | tty->termios->c_oflag /* output modes */ |
b9db07fb | 1067 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1068 | |
b9db07fb LM |
1069 | tty->termios->c_lflag /* line discipline modes */ |
1070 | &= ~(ECHO /* disable echo input characters */ | |
1071 | | ECHONL /* disable echo new line */ | |
1072 | | ICANON /* disable erase, kill, werase, and rprnt | |
1073 | special characters */ | |
1074 | | ISIG /* disable interrupt, quit, and suspend | |
1075 | special characters */ | |
1076 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1077 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1078 | |
1da177e4 LT |
1079 | linechange = (priv->line_control != oldlines); |
1080 | spin_unlock_irqrestore(&priv->lock, flags); | |
1081 | ||
1082 | /* if necessary, set lines */ | |
3cb4a4f7 | 1083 | if (linechange) { |
1da177e4 | 1084 | priv->cmd_ctrl = 1; |
95da310e | 1085 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1086 | } |
1da177e4 LT |
1087 | } /* cypress_set_termios */ |
1088 | ||
b9db07fb | 1089 | |
1da177e4 | 1090 | /* returns amount of data still left in soft buffer */ |
95da310e | 1091 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1092 | { |
95da310e | 1093 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1094 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1095 | int chars = 0; | |
1096 | unsigned long flags; | |
1097 | ||
441b62c1 | 1098 | dbg("%s - port %d", __func__, port->number); |
813a224f | 1099 | |
1da177e4 | 1100 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 1101 | chars = kfifo_len(&priv->write_fifo); |
1da177e4 LT |
1102 | spin_unlock_irqrestore(&priv->lock, flags); |
1103 | ||
441b62c1 | 1104 | dbg("%s - returns %d", __func__, chars); |
1da177e4 LT |
1105 | return chars; |
1106 | } | |
1107 | ||
1108 | ||
95da310e | 1109 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1110 | { |
95da310e | 1111 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1112 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1da177e4 | 1113 | |
441b62c1 | 1114 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1115 | |
63832515 | 1116 | spin_lock_irq(&priv->lock); |
1da177e4 | 1117 | priv->rx_flags = THROTTLED; |
63832515 | 1118 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
1119 | } |
1120 | ||
1121 | ||
95da310e | 1122 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1123 | { |
95da310e | 1124 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1125 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1126 | int actually_throttled, result; | |
1da177e4 | 1127 | |
441b62c1 | 1128 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1129 | |
63832515 | 1130 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
1131 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
1132 | priv->rx_flags = 0; | |
63832515 | 1133 | spin_unlock_irq(&priv->lock); |
1da177e4 | 1134 | |
78aef519 MI |
1135 | if (!priv->comm_is_ok) |
1136 | return; | |
1137 | ||
1da177e4 | 1138 | if (actually_throttled) { |
63832515 | 1139 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
78aef519 | 1140 | if (result) { |
b9db07fb | 1141 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1142 | "error %d\n", __func__, result); |
78aef519 MI |
1143 | cypress_set_dead(port); |
1144 | } | |
1da177e4 LT |
1145 | } |
1146 | } | |
1147 | ||
1148 | ||
7d12e780 | 1149 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1150 | { |
cdc97792 | 1151 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1152 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1153 | struct tty_struct *tty; | |
1154 | unsigned char *data = urb->transfer_buffer; | |
1155 | unsigned long flags; | |
b9db07fb | 1156 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1157 | int havedata = 0; |
1158 | int bytes = 0; | |
1159 | int result; | |
1160 | int i = 0; | |
8d7bc55e | 1161 | int status = urb->status; |
1da177e4 | 1162 | |
441b62c1 | 1163 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1164 | |
8d7bc55e | 1165 | switch (status) { |
78aef519 MI |
1166 | case 0: /* success */ |
1167 | break; | |
1168 | case -ECONNRESET: | |
1169 | case -ENOENT: | |
1170 | case -ESHUTDOWN: | |
1171 | /* precursor to disconnect so just go away */ | |
1172 | return; | |
1173 | case -EPIPE: | |
4d2fae8b AS |
1174 | /* Can't call usb_clear_halt while in_interrupt */ |
1175 | /* FALLS THROUGH */ | |
78aef519 MI |
1176 | default: |
1177 | /* something ugly is going on... */ | |
813a224f AC |
1178 | dev_err(&urb->dev->dev, |
1179 | "%s - unexpected nonzero read status received: %d\n", | |
1180 | __func__, status); | |
78aef519 | 1181 | cypress_set_dead(port); |
1da177e4 LT |
1182 | return; |
1183 | } | |
1184 | ||
1185 | spin_lock_irqsave(&priv->lock, flags); | |
1186 | if (priv->rx_flags & THROTTLED) { | |
441b62c1 | 1187 | dbg("%s - now throttling", __func__); |
1da177e4 LT |
1188 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1189 | spin_unlock_irqrestore(&priv->lock, flags); | |
1190 | return; | |
1191 | } | |
1192 | spin_unlock_irqrestore(&priv->lock, flags); | |
1193 | ||
4a90f09b | 1194 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1195 | if (!tty) { |
441b62c1 | 1196 | dbg("%s - bad tty pointer - exiting", __func__); |
1da177e4 LT |
1197 | return; |
1198 | } | |
1199 | ||
1200 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1201 | result = urb->actual_length; |
1202 | switch (priv->pkt_fmt) { | |
1203 | default: | |
1204 | case packet_format_1: | |
1205 | /* This is for the CY7C64013... */ | |
1206 | priv->current_status = data[0] & 0xF8; | |
1207 | bytes = data[1] + 2; | |
1208 | i = 2; | |
1209 | if (bytes > 2) | |
1210 | havedata = 1; | |
1211 | break; | |
1212 | case packet_format_2: | |
1213 | /* This is for the CY7C63743... */ | |
1214 | priv->current_status = data[0] & 0xF8; | |
1215 | bytes = (data[0] & 0x07) + 1; | |
1216 | i = 1; | |
1217 | if (bytes > 1) | |
1218 | havedata = 1; | |
1219 | break; | |
1da177e4 LT |
1220 | } |
1221 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 MI |
1222 | if (result < bytes) { |
1223 | dbg("%s - wrong packet size - received %d bytes but packet " | |
1224 | "said %d bytes", __func__, result, bytes); | |
1225 | goto continue_read; | |
1226 | } | |
1da177e4 | 1227 | |
813a224f AC |
1228 | usb_serial_debug_data(debug, &port->dev, __func__, |
1229 | urb->actual_length, data); | |
1da177e4 LT |
1230 | |
1231 | spin_lock_irqsave(&priv->lock, flags); | |
1232 | /* check to see if status has changed */ | |
6768306c MI |
1233 | if (priv->current_status != priv->prev_status) { |
1234 | priv->diff_status |= priv->current_status ^ | |
1235 | priv->prev_status; | |
1236 | wake_up_interruptible(&priv->delta_msr_wait); | |
1237 | priv->prev_status = priv->current_status; | |
1da177e4 | 1238 | } |
b9db07fb | 1239 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1240 | |
b9db07fb LM |
1241 | /* hangup, as defined in acm.c... this might be a bad place for it |
1242 | * though */ | |
1243 | if (tty && !(tty->termios->c_cflag & CLOCAL) && | |
1244 | !(priv->current_status & UART_CD)) { | |
441b62c1 | 1245 | dbg("%s - calling hangup", __func__); |
1da177e4 LT |
1246 | tty_hangup(tty); |
1247 | goto continue_read; | |
1248 | } | |
1249 | ||
b9db07fb LM |
1250 | /* There is one error bit... I'm assuming it is a parity error |
1251 | * indicator as the generic firmware will set this bit to 1 if a | |
1252 | * parity error occurs. | |
1253 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1254 | spin_lock_irqsave(&priv->lock, flags); |
1255 | if (priv->current_status & CYP_ERROR) { | |
1256 | spin_unlock_irqrestore(&priv->lock, flags); | |
1257 | tty_flag = TTY_PARITY; | |
441b62c1 | 1258 | dbg("%s - Parity Error detected", __func__); |
1da177e4 LT |
1259 | } else |
1260 | spin_unlock_irqrestore(&priv->lock, flags); | |
1261 | ||
1262 | /* process read if there is data other than line status */ | |
a108bfcb AC |
1263 | if (tty && bytes > i) { |
1264 | tty_insert_flip_string_fixed_flag(tty, data + i, | |
70ced221 | 1265 | tty_flag, bytes - i); |
4a90f09b | 1266 | tty_flip_buffer_push(tty); |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1270 | /* control and status byte(s) are also counted */ |
1271 | priv->bytes_in += bytes; | |
1da177e4 LT |
1272 | spin_unlock_irqrestore(&priv->lock, flags); |
1273 | ||
1274 | continue_read: | |
4a90f09b | 1275 | tty_kref_put(tty); |
b9db07fb | 1276 | |
1f87158e | 1277 | /* Continue trying to always read */ |
1da177e4 | 1278 | |
1f87158e | 1279 | if (priv->comm_is_ok) { |
b9db07fb LM |
1280 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1281 | usb_rcvintpipe(port->serial->dev, | |
1282 | port->interrupt_in_endpointAddress), | |
1283 | port->interrupt_in_urb->transfer_buffer, | |
1284 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1285 | cypress_read_int_callback, port, |
1286 | priv->read_urb_interval); | |
b9db07fb | 1287 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
1f87158e | 1288 | if (result && result != -EPERM) { |
b9db07fb | 1289 | dev_err(&urb->dev->dev, "%s - failed resubmitting " |
441b62c1 | 1290 | "read urb, error %d\n", __func__, |
b9db07fb | 1291 | result); |
78aef519 MI |
1292 | cypress_set_dead(port); |
1293 | } | |
1da177e4 | 1294 | } |
1da177e4 LT |
1295 | } /* cypress_read_int_callback */ |
1296 | ||
1297 | ||
7d12e780 | 1298 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1299 | { |
cdc97792 | 1300 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1301 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1302 | int result; | |
8d7bc55e | 1303 | int status = urb->status; |
1da177e4 | 1304 | |
441b62c1 | 1305 | dbg("%s - port %d", __func__, port->number); |
8d7bc55e GKH |
1306 | |
1307 | switch (status) { | |
813a224f AC |
1308 | case 0: |
1309 | /* success */ | |
1310 | break; | |
1311 | case -ECONNRESET: | |
1312 | case -ENOENT: | |
1313 | case -ESHUTDOWN: | |
1314 | /* this urb is terminated, clean up */ | |
1315 | dbg("%s - urb shutting down with status: %d", | |
1316 | __func__, status); | |
1317 | priv->write_urb_in_use = 0; | |
1318 | return; | |
1319 | case -EPIPE: /* no break needed; clear halt and resubmit */ | |
1320 | if (!priv->comm_is_ok) | |
1da177e4 | 1321 | break; |
813a224f AC |
1322 | usb_clear_halt(port->serial->dev, 0x02); |
1323 | /* error in the urb, so we have to resubmit it */ | |
1324 | dbg("%s - nonzero write bulk status received: %d", | |
1325 | __func__, status); | |
1326 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
813a224f AC |
1327 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1328 | if (!result) | |
1da177e4 | 1329 | return; |
813a224f AC |
1330 | dev_err(&urb->dev->dev, |
1331 | "%s - failed resubmitting write urb, error %d\n", | |
1332 | __func__, result); | |
1333 | cypress_set_dead(port); | |
1334 | break; | |
1335 | default: | |
1336 | dev_err(&urb->dev->dev, | |
1337 | "%s - unexpected nonzero write status received: %d\n", | |
1338 | __func__, status); | |
1339 | cypress_set_dead(port); | |
1340 | break; | |
1da177e4 | 1341 | } |
1da177e4 | 1342 | priv->write_urb_in_use = 0; |
813a224f | 1343 | |
1da177e4 LT |
1344 | /* send any buffered data */ |
1345 | cypress_send(port); | |
1346 | } | |
1347 | ||
1348 | ||
1da177e4 LT |
1349 | /***************************************************************************** |
1350 | * Module functions | |
1351 | *****************************************************************************/ | |
1352 | ||
1353 | static int __init cypress_init(void) | |
1354 | { | |
1355 | int retval; | |
813a224f | 1356 | |
441b62c1 | 1357 | dbg("%s", __func__); |
813a224f | 1358 | |
1da177e4 LT |
1359 | retval = usb_serial_register(&cypress_earthmate_device); |
1360 | if (retval) | |
1361 | goto failed_em_register; | |
1362 | retval = usb_serial_register(&cypress_hidcom_device); | |
1363 | if (retval) | |
1364 | goto failed_hidcom_register; | |
a5c44e29 LM |
1365 | retval = usb_serial_register(&cypress_ca42v2_device); |
1366 | if (retval) | |
1367 | goto failed_ca42v2_register; | |
1da177e4 LT |
1368 | retval = usb_register(&cypress_driver); |
1369 | if (retval) | |
1370 | goto failed_usb_register; | |
1371 | ||
c197a8db GKH |
1372 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1373 | DRIVER_DESC "\n"); | |
1da177e4 | 1374 | return 0; |
2e46b748 | 1375 | |
1da177e4 | 1376 | failed_usb_register: |
a5c44e29 | 1377 | usb_serial_deregister(&cypress_ca42v2_device); |
2e46b748 | 1378 | failed_ca42v2_register: |
1da177e4 | 1379 | usb_serial_deregister(&cypress_hidcom_device); |
2e46b748 | 1380 | failed_hidcom_register: |
1da177e4 | 1381 | usb_serial_deregister(&cypress_earthmate_device); |
2e46b748 | 1382 | failed_em_register: |
1da177e4 LT |
1383 | return retval; |
1384 | } | |
1385 | ||
1386 | ||
813a224f | 1387 | static void __exit cypress_exit(void) |
1da177e4 | 1388 | { |
441b62c1 | 1389 | dbg("%s", __func__); |
1da177e4 | 1390 | |
813a224f AC |
1391 | usb_deregister(&cypress_driver); |
1392 | usb_serial_deregister(&cypress_earthmate_device); | |
1393 | usb_serial_deregister(&cypress_hidcom_device); | |
1394 | usb_serial_deregister(&cypress_ca42v2_device); | |
1da177e4 LT |
1395 | } |
1396 | ||
1397 | ||
1398 | module_init(cypress_init); | |
1399 | module_exit(cypress_exit); | |
1400 | ||
813a224f AC |
1401 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1402 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1403 | MODULE_VERSION(DRIVER_VERSION); | |
1da177e4 LT |
1404 | MODULE_LICENSE("GPL"); |
1405 | ||
1406 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1407 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1408 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1409 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1410 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1411 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); | |
c312659c MF |
1412 | module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR); |
1413 | MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates"); |