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. | |
19 | * | |
3cb4a4f7 LM |
20 | * Lonnie Mendez <dignome@gmail.com> |
21 | * 4-29-2005 | |
813a224f AC |
22 | * Fixed problem where setting or retreiving the serial config would fail |
23 | * with EPIPE. Removed CRTS toggling so the driver behaves more like | |
24 | * other usbserial adapters. Issued new interval of 1ms instead of the | |
25 | * default 10ms. As a result, transfer speed has been substantially | |
26 | * increased from avg. 850bps to avg. 3300bps. initial termios has also | |
27 | * been modified. Cleaned up code and formatting issues so it is more | |
28 | * readable. Replaced the C++ style comments. | |
1da177e4 LT |
29 | * |
30 | * Lonnie Mendez <dignome@gmail.com> | |
31 | * 12-15-2004 | |
32 | * Incorporated write buffering from pl2303 driver. Fixed bug with line | |
33 | * handling so both lines are raised in cypress_open. (was dropping rts) | |
34 | * Various code cleanups made as well along with other misc bug fixes. | |
35 | * | |
36 | * Lonnie Mendez <dignome@gmail.com> | |
37 | * 04-10-2004 | |
38 | * Driver modified to support dynamic line settings. Various improvments | |
39 | * and features. | |
40 | * | |
41 | * Neil Whelchel | |
42 | * 10-2003 | |
43 | * Driver first released. | |
44 | * | |
1da177e4 LT |
45 | */ |
46 | ||
813a224f AC |
47 | /* Thanks to Neil Whelchel for writing the first cypress m8 implementation |
48 | for linux. */ | |
1da177e4 LT |
49 | /* Thanks to cypress for providing references for the hid reports. */ |
50 | /* Thanks to Jiang Zhang for providing links and for general help. */ | |
813a224f | 51 | /* Code originates and was built up from ftdi_sio, belkin, pl2303 and others.*/ |
1da177e4 LT |
52 | |
53 | ||
1da177e4 LT |
54 | #include <linux/kernel.h> |
55 | #include <linux/errno.h> | |
56 | #include <linux/init.h> | |
57 | #include <linux/slab.h> | |
58 | #include <linux/tty.h> | |
59 | #include <linux/tty_driver.h> | |
60 | #include <linux/tty_flip.h> | |
61 | #include <linux/module.h> | |
62 | #include <linux/moduleparam.h> | |
63 | #include <linux/spinlock.h> | |
64 | #include <linux/usb.h> | |
a969888c | 65 | #include <linux/usb/serial.h> |
1da177e4 LT |
66 | #include <linux/serial.h> |
67 | #include <linux/delay.h> | |
813a224f | 68 | #include <linux/uaccess.h> |
1da177e4 | 69 | |
1da177e4 LT |
70 | #include "cypress_m8.h" |
71 | ||
72 | ||
73 | #ifdef CONFIG_USB_SERIAL_DEBUG | |
74 | static int debug = 1; | |
75 | #else | |
76 | static int debug; | |
77 | #endif | |
78 | static int stats; | |
3cb4a4f7 | 79 | static int interval; |
1da177e4 LT |
80 | |
81 | /* | |
82 | * Version Information | |
83 | */ | |
3cb4a4f7 | 84 | #define DRIVER_VERSION "v1.09" |
1da177e4 LT |
85 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
86 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
87 | ||
88 | /* write buffer size defines */ | |
89 | #define CYPRESS_BUF_SIZE 1024 | |
90 | #define CYPRESS_CLOSING_WAIT (30*HZ) | |
91 | ||
92 | static struct usb_device_id id_table_earthmate [] = { | |
93 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
25b6f08e | 94 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
95 | { } /* Terminating entry */ |
96 | }; | |
97 | ||
98 | static struct usb_device_id id_table_cyphidcomrs232 [] = { | |
99 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, | |
6f6f06ee | 100 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
1da177e4 LT |
101 | { } /* Terminating entry */ |
102 | }; | |
103 | ||
a5c44e29 LM |
104 | static struct usb_device_id id_table_nokiaca42v2 [] = { |
105 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, | |
106 | { } /* Terminating entry */ | |
107 | }; | |
108 | ||
1da177e4 LT |
109 | static struct usb_device_id id_table_combined [] = { |
110 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
25b6f08e | 111 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 112 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 113 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
a5c44e29 | 114 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
115 | { } /* Terminating entry */ |
116 | }; | |
117 | ||
813a224f | 118 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
119 | |
120 | static struct usb_driver cypress_driver = { | |
121 | .name = "cypress", | |
122 | .probe = usb_serial_probe, | |
123 | .disconnect = usb_serial_disconnect, | |
124 | .id_table = id_table_combined, | |
ba9dc657 | 125 | .no_dynamic_id = 1, |
1da177e4 LT |
126 | }; |
127 | ||
3416eaa1 MI |
128 | enum packet_format { |
129 | packet_format_1, /* b0:status, b1:payload count */ | |
130 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
131 | }; | |
132 | ||
1da177e4 LT |
133 | struct cypress_private { |
134 | spinlock_t lock; /* private lock */ | |
135 | int chiptype; /* identifier of device, for quirks/etc */ | |
136 | int bytes_in; /* used for statistics */ | |
137 | int bytes_out; /* used for statistics */ | |
138 | int cmd_count; /* used for statistics */ | |
139 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
140 | struct cypress_buf *buf; /* write buffer */ | |
141 | int write_urb_in_use; /* write urb in use indicator */ | |
0257fa9f MI |
142 | int write_urb_interval; /* interval to use for write urb */ |
143 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 144 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
145 | int termios_initialized; |
146 | __u8 line_control; /* holds dtr / rts value */ | |
147 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
148 | __u8 current_config; /* stores the current configuration byte */ | |
149 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 150 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 151 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
152 | int baud_rate; /* stores current baud rate in |
153 | integer form */ | |
1da177e4 LT |
154 | int isthrottled; /* if throttled, discard reads */ |
155 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
156 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
813a224f AC |
157 | /* we pass a pointer to this as the arguement sent to |
158 | cypress_set_termios old_termios */ | |
606d099c | 159 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
160 | }; |
161 | ||
162 | /* write buffer structure */ | |
163 | struct cypress_buf { | |
164 | unsigned int buf_size; | |
165 | char *buf_buf; | |
166 | char *buf_get; | |
167 | char *buf_put; | |
168 | }; | |
169 | ||
170 | /* function prototypes for the Cypress USB to serial device */ | |
813a224f AC |
171 | static int cypress_earthmate_startup(struct usb_serial *serial); |
172 | static int cypress_hidcom_startup(struct usb_serial *serial); | |
173 | static int cypress_ca42v2_startup(struct usb_serial *serial); | |
174 | static void cypress_shutdown(struct usb_serial *serial); | |
175 | static int cypress_open(struct tty_struct *tty, | |
176 | struct usb_serial_port *port, struct file *filp); | |
177 | static void cypress_close(struct tty_struct *tty, | |
178 | struct usb_serial_port *port, struct file *filp); | |
179 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, | |
180 | const unsigned char *buf, int count); | |
181 | static void cypress_send(struct usb_serial_port *port); | |
182 | static int cypress_write_room(struct tty_struct *tty); | |
183 | static int cypress_ioctl(struct tty_struct *tty, struct file *file, | |
184 | unsigned int cmd, unsigned long arg); | |
185 | static void cypress_set_termios(struct tty_struct *tty, | |
186 | struct usb_serial_port *port, struct ktermios *old); | |
187 | static int cypress_tiocmget(struct tty_struct *tty, struct file *file); | |
188 | static int cypress_tiocmset(struct tty_struct *tty, struct file *file, | |
189 | unsigned int set, unsigned int clear); | |
190 | static int cypress_chars_in_buffer(struct tty_struct *tty); | |
191 | static void cypress_throttle(struct tty_struct *tty); | |
192 | static void cypress_unthrottle(struct tty_struct *tty); | |
193 | static void cypress_set_dead(struct usb_serial_port *port); | |
194 | static void cypress_read_int_callback(struct urb *urb); | |
195 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 LT |
196 | /* write buffer functions */ |
197 | static struct cypress_buf *cypress_buf_alloc(unsigned int size); | |
813a224f AC |
198 | static void cypress_buf_free(struct cypress_buf *cb); |
199 | static void cypress_buf_clear(struct cypress_buf *cb); | |
200 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb); | |
201 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb); | |
202 | static unsigned int cypress_buf_put(struct cypress_buf *cb, | |
203 | const char *buf, unsigned int count); | |
204 | static unsigned int cypress_buf_get(struct cypress_buf *cb, | |
205 | char *buf, unsigned int count); | |
1da177e4 LT |
206 | |
207 | ||
ea65370d | 208 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
209 | .driver = { |
210 | .owner = THIS_MODULE, | |
269bda1c | 211 | .name = "earthmate", |
18fcac35 | 212 | }, |
269bda1c | 213 | .description = "DeLorme Earthmate USB", |
d9b1b787 | 214 | .usb_driver = &cypress_driver, |
1da177e4 | 215 | .id_table = id_table_earthmate, |
1da177e4 LT |
216 | .num_ports = 1, |
217 | .attach = cypress_earthmate_startup, | |
218 | .shutdown = cypress_shutdown, | |
219 | .open = cypress_open, | |
220 | .close = cypress_close, | |
221 | .write = cypress_write, | |
222 | .write_room = cypress_write_room, | |
223 | .ioctl = cypress_ioctl, | |
224 | .set_termios = cypress_set_termios, | |
225 | .tiocmget = cypress_tiocmget, | |
226 | .tiocmset = cypress_tiocmset, | |
227 | .chars_in_buffer = cypress_chars_in_buffer, | |
228 | .throttle = cypress_throttle, | |
229 | .unthrottle = cypress_unthrottle, | |
230 | .read_int_callback = cypress_read_int_callback, | |
231 | .write_int_callback = cypress_write_int_callback, | |
232 | }; | |
233 | ||
ea65370d | 234 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
235 | .driver = { |
236 | .owner = THIS_MODULE, | |
269bda1c | 237 | .name = "cyphidcom", |
18fcac35 | 238 | }, |
269bda1c | 239 | .description = "HID->COM RS232 Adapter", |
d9b1b787 | 240 | .usb_driver = &cypress_driver, |
1da177e4 | 241 | .id_table = id_table_cyphidcomrs232, |
1da177e4 LT |
242 | .num_ports = 1, |
243 | .attach = cypress_hidcom_startup, | |
244 | .shutdown = cypress_shutdown, | |
245 | .open = cypress_open, | |
246 | .close = cypress_close, | |
247 | .write = cypress_write, | |
248 | .write_room = cypress_write_room, | |
249 | .ioctl = cypress_ioctl, | |
250 | .set_termios = cypress_set_termios, | |
251 | .tiocmget = cypress_tiocmget, | |
252 | .tiocmset = cypress_tiocmset, | |
253 | .chars_in_buffer = cypress_chars_in_buffer, | |
254 | .throttle = cypress_throttle, | |
255 | .unthrottle = cypress_unthrottle, | |
256 | .read_int_callback = cypress_read_int_callback, | |
257 | .write_int_callback = cypress_write_int_callback, | |
258 | }; | |
259 | ||
a5c44e29 LM |
260 | static struct usb_serial_driver cypress_ca42v2_device = { |
261 | .driver = { | |
262 | .owner = THIS_MODULE, | |
813a224f | 263 | .name = "nokiaca42v2", |
a5c44e29 LM |
264 | }, |
265 | .description = "Nokia CA-42 V2 Adapter", | |
d9b1b787 | 266 | .usb_driver = &cypress_driver, |
a5c44e29 | 267 | .id_table = id_table_nokiaca42v2, |
a5c44e29 LM |
268 | .num_ports = 1, |
269 | .attach = cypress_ca42v2_startup, | |
270 | .shutdown = cypress_shutdown, | |
271 | .open = cypress_open, | |
272 | .close = cypress_close, | |
273 | .write = cypress_write, | |
274 | .write_room = cypress_write_room, | |
275 | .ioctl = cypress_ioctl, | |
276 | .set_termios = cypress_set_termios, | |
277 | .tiocmget = cypress_tiocmget, | |
278 | .tiocmset = cypress_tiocmset, | |
279 | .chars_in_buffer = cypress_chars_in_buffer, | |
280 | .throttle = cypress_throttle, | |
281 | .unthrottle = cypress_unthrottle, | |
282 | .read_int_callback = cypress_read_int_callback, | |
283 | .write_int_callback = cypress_write_int_callback, | |
284 | }; | |
1da177e4 LT |
285 | |
286 | /***************************************************************************** | |
287 | * Cypress serial helper functions | |
288 | *****************************************************************************/ | |
289 | ||
290 | ||
8873aaa6 | 291 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 292 | { |
92983c21 MI |
293 | struct cypress_private *priv; |
294 | priv = usb_get_serial_port_data(port); | |
295 | ||
296 | /* | |
297 | * The general purpose firmware for the Cypress M8 allows for | |
298 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
299 | * chose to use the general purpose firmware or not), if you | |
300 | * need to modify this speed setting for your own project | |
301 | * please add your own chiptype and modify the code likewise. | |
302 | * The Cypress HID->COM device will work successfully up to | |
303 | * 115200bps (but the actual throughput is around 3kBps). | |
304 | */ | |
92983c21 MI |
305 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
306 | /* | |
307 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
308 | * Cypress app note that describes this mechanism | |
309 | * states the the low-speed part can't handle more | |
310 | * than 800 bytes/sec, in which case 4800 baud is the | |
311 | * safest speed for a part like that. | |
312 | */ | |
313 | if (new_rate > 4800) { | |
314 | dbg("%s - failed setting baud rate, device incapable " | |
315 | "speed %d", __func__, new_rate); | |
316 | return -1; | |
317 | } | |
318 | } | |
319 | switch (priv->chiptype) { | |
320 | case CT_EARTHMATE: | |
321 | if (new_rate <= 600) { | |
322 | /* 300 and 600 baud rates are supported under | |
323 | * the generic firmware, but are not used with | |
324 | * NMEA and SiRF protocols */ | |
325 | dbg("%s - failed setting baud rate, unsupported speed " | |
326 | "of %d on Earthmate GPS", __func__, new_rate); | |
327 | return -1; | |
328 | } | |
329 | break; | |
330 | default: | |
331 | break; | |
332 | } | |
333 | return new_rate; | |
334 | } | |
335 | ||
336 | ||
093cf723 | 337 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 338 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
339 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
340 | int stop_bits, int parity_enable, int parity_type, int reset, | |
341 | int cypress_request_type) | |
1da177e4 | 342 | { |
3cb4a4f7 | 343 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 344 | struct cypress_private *priv; |
93075544 | 345 | __u8 feature_buffer[5]; |
1da177e4 LT |
346 | unsigned long flags; |
347 | ||
441b62c1 | 348 | dbg("%s", __func__); |
813a224f | 349 | |
1da177e4 LT |
350 | priv = usb_get_serial_port_data(port); |
351 | ||
78aef519 MI |
352 | if (!priv->comm_is_ok) |
353 | return -ENODEV; | |
354 | ||
813a224f AC |
355 | switch (cypress_request_type) { |
356 | case CYPRESS_SET_CONFIG: | |
357 | new_baudrate = priv->baud_rate; | |
358 | /* 0 means 'Hang up' so doesn't change the true bit rate */ | |
359 | if (baud_rate == 0) | |
92983c21 | 360 | new_baudrate = priv->baud_rate; |
813a224f AC |
361 | /* Change of speed ? */ |
362 | else if (baud_rate != priv->baud_rate) { | |
363 | dbg("%s - baud rate is changing", __func__); | |
364 | retval = analyze_baud_rate(port, baud_rate); | |
365 | if (retval >= 0) { | |
366 | new_baudrate = retval; | |
367 | dbg("%s - New baud rate set to %d", | |
368 | __func__, new_baudrate); | |
1da177e4 | 369 | } |
813a224f AC |
370 | } |
371 | dbg("%s - baud rate is being sent as %d", | |
372 | __func__, new_baudrate); | |
373 | ||
374 | memset(feature_buffer, 0, sizeof(feature_buffer)); | |
375 | /* fill the feature_buffer with new configuration */ | |
376 | *((u_int32_t *)feature_buffer) = new_baudrate; | |
377 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ | |
378 | /* 1 bit gap */ | |
379 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
380 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
381 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
382 | /* 1 bit gap */ | |
383 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
384 | ||
385 | dbg("%s - device is being sent this feature report:", | |
386 | __func__); | |
387 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __func__, | |
388 | feature_buffer[0], feature_buffer[1], | |
389 | feature_buffer[2], feature_buffer[3], | |
390 | feature_buffer[4]); | |
391 | ||
392 | do { | |
393 | retval = usb_control_msg(port->serial->dev, | |
394 | usb_sndctrlpipe(port->serial->dev, 0), | |
395 | HID_REQ_SET_REPORT, | |
396 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
397 | 0x0300, 0, feature_buffer, | |
398 | sizeof(feature_buffer), 500); | |
399 | ||
400 | if (tries++ >= 3) | |
401 | break; | |
402 | ||
403 | } while (retval != sizeof(feature_buffer) && | |
404 | retval != -ENODEV); | |
405 | ||
406 | if (retval != sizeof(feature_buffer)) { | |
194343d9 GKH |
407 | dev_err(&port->dev, "%s - failed sending serial " |
408 | "line settings - %d\n", __func__, retval); | |
813a224f AC |
409 | cypress_set_dead(port); |
410 | } else { | |
411 | spin_lock_irqsave(&priv->lock, flags); | |
412 | priv->baud_rate = new_baudrate; | |
413 | priv->current_config = feature_buffer[4]; | |
414 | spin_unlock_irqrestore(&priv->lock, flags); | |
415 | /* If we asked for a speed change encode it */ | |
416 | if (baud_rate) | |
417 | tty_encode_baud_rate(tty, | |
418 | new_baudrate, new_baudrate); | |
419 | } | |
420 | break; | |
421 | case CYPRESS_GET_CONFIG: | |
422 | if (priv->get_cfg_unsafe) { | |
423 | /* Not implemented for this device, | |
424 | and if we try to do it we're likely | |
425 | to crash the hardware. */ | |
426 | return -ENOTTY; | |
427 | } | |
428 | dbg("%s - retreiving serial line settings", __func__); | |
429 | /* set initial values in feature buffer */ | |
430 | memset(feature_buffer, 0, sizeof(feature_buffer)); | |
431 | ||
432 | do { | |
433 | retval = usb_control_msg(port->serial->dev, | |
434 | usb_rcvctrlpipe(port->serial->dev, 0), | |
435 | HID_REQ_GET_REPORT, | |
436 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
437 | 0x0300, 0, feature_buffer, | |
438 | sizeof(feature_buffer), 500); | |
439 | ||
440 | if (tries++ >= 3) | |
441 | break; | |
442 | } while (retval != sizeof(feature_buffer) | |
443 | && retval != -ENODEV); | |
444 | ||
445 | if (retval != sizeof(feature_buffer)) { | |
194343d9 GKH |
446 | dev_err(&port->dev, "%s - failed to retrieve serial " |
447 | "line settings - %d\n", __func__, retval); | |
813a224f AC |
448 | cypress_set_dead(port); |
449 | return retval; | |
450 | } else { | |
451 | spin_lock_irqsave(&priv->lock, flags); | |
452 | /* store the config in one byte, and later | |
453 | use bit masks to check values */ | |
454 | priv->current_config = feature_buffer[4]; | |
455 | priv->baud_rate = *((u_int32_t *)feature_buffer); | |
456 | spin_unlock_irqrestore(&priv->lock, flags); | |
457 | } | |
1da177e4 | 458 | } |
3cb4a4f7 LM |
459 | spin_lock_irqsave(&priv->lock, flags); |
460 | ++priv->cmd_count; | |
461 | spin_unlock_irqrestore(&priv->lock, flags); | |
462 | ||
1da177e4 LT |
463 | return retval; |
464 | } /* cypress_serial_control */ | |
465 | ||
466 | ||
78aef519 MI |
467 | static void cypress_set_dead(struct usb_serial_port *port) |
468 | { | |
469 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
470 | unsigned long flags; | |
471 | ||
472 | spin_lock_irqsave(&priv->lock, flags); | |
473 | if (!priv->comm_is_ok) { | |
474 | spin_unlock_irqrestore(&priv->lock, flags); | |
475 | return; | |
476 | } | |
477 | priv->comm_is_ok = 0; | |
478 | spin_unlock_irqrestore(&priv->lock, flags); | |
479 | ||
194343d9 GKH |
480 | dev_err(&port->dev, "cypress_m8 suspending failing port %d - " |
481 | "interval might be too short\n", port->number); | |
78aef519 MI |
482 | } |
483 | ||
484 | ||
1da177e4 LT |
485 | /***************************************************************************** |
486 | * Cypress serial driver functions | |
487 | *****************************************************************************/ | |
488 | ||
489 | ||
813a224f | 490 | static int generic_startup(struct usb_serial *serial) |
1da177e4 LT |
491 | { |
492 | struct cypress_private *priv; | |
0257fa9f | 493 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 494 | |
441b62c1 | 495 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 496 | |
813a224f | 497 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
498 | if (!priv) |
499 | return -ENOMEM; | |
500 | ||
78aef519 | 501 | priv->comm_is_ok = !0; |
1da177e4 LT |
502 | spin_lock_init(&priv->lock); |
503 | priv->buf = cypress_buf_alloc(CYPRESS_BUF_SIZE); | |
504 | if (priv->buf == NULL) { | |
505 | kfree(priv); | |
506 | return -ENOMEM; | |
507 | } | |
508 | init_waitqueue_head(&priv->delta_msr_wait); | |
813a224f AC |
509 | |
510 | usb_reset_configuration(serial->dev); | |
511 | ||
1da177e4 LT |
512 | priv->cmd_ctrl = 0; |
513 | priv->line_control = 0; | |
514 | priv->termios_initialized = 0; | |
1da177e4 | 515 | priv->rx_flags = 0; |
3416eaa1 MI |
516 | /* Default packet format setting is determined by packet size. |
517 | Anything with a size larger then 9 must have a separate | |
518 | count field since the 3 bit count field is otherwise too | |
519 | small. Otherwise we can use the slightly more compact | |
520 | format. This is in accordance with the cypress_m8 serial | |
521 | converter app note. */ | |
813a224f | 522 | if (port->interrupt_out_size > 9) |
3416eaa1 | 523 | priv->pkt_fmt = packet_format_1; |
813a224f | 524 | else |
3416eaa1 | 525 | priv->pkt_fmt = packet_format_2; |
813a224f | 526 | |
0257fa9f MI |
527 | if (interval > 0) { |
528 | priv->write_urb_interval = interval; | |
529 | priv->read_urb_interval = interval; | |
530 | dbg("%s - port %d read & write intervals forced to %d", | |
813a224f | 531 | __func__, port->number, interval); |
0257fa9f MI |
532 | } else { |
533 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
534 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
535 | dbg("%s - port %d intervals: read=%d write=%d", | |
813a224f AC |
536 | __func__, port->number, |
537 | priv->read_urb_interval, priv->write_urb_interval); | |
0257fa9f MI |
538 | } |
539 | usb_set_serial_port_data(port, priv); | |
813a224f | 540 | |
b9db07fb LM |
541 | return 0; |
542 | } | |
1da177e4 LT |
543 | |
544 | ||
813a224f | 545 | static int cypress_earthmate_startup(struct usb_serial *serial) |
1da177e4 LT |
546 | { |
547 | struct cypress_private *priv; | |
3d6aa320 | 548 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 549 | |
441b62c1 | 550 | dbg("%s", __func__); |
1da177e4 LT |
551 | |
552 | if (generic_startup(serial)) { | |
441b62c1 | 553 | dbg("%s - Failed setting up port %d", __func__, |
3d6aa320 | 554 | port->number); |
1da177e4 LT |
555 | return 1; |
556 | } | |
557 | ||
3d6aa320 | 558 | priv = usb_get_serial_port_data(port); |
1da177e4 | 559 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
560 | /* All Earthmate devices use the separated-count packet |
561 | format! Idiotic. */ | |
562 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
563 | if (serial->dev->descriptor.idProduct != |
564 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
565 | /* The old original USB Earthmate seemed able to |
566 | handle GET_CONFIG requests; everything they've | |
567 | produced since that time crashes if this command is | |
568 | attempted :-( */ | |
569 | dbg("%s - Marking this device as unsafe for GET_CONFIG " | |
570 | "commands", __func__); | |
571 | priv->get_cfg_unsafe = !0; | |
572 | } | |
b9db07fb LM |
573 | |
574 | return 0; | |
1da177e4 LT |
575 | } /* cypress_earthmate_startup */ |
576 | ||
577 | ||
813a224f | 578 | static int cypress_hidcom_startup(struct usb_serial *serial) |
1da177e4 LT |
579 | { |
580 | struct cypress_private *priv; | |
581 | ||
441b62c1 | 582 | dbg("%s", __func__); |
1da177e4 LT |
583 | |
584 | if (generic_startup(serial)) { | |
441b62c1 | 585 | dbg("%s - Failed setting up port %d", __func__, |
b9db07fb | 586 | serial->port[0]->number); |
1da177e4 LT |
587 | return 1; |
588 | } | |
589 | ||
590 | priv = usb_get_serial_port_data(serial->port[0]); | |
591 | priv->chiptype = CT_CYPHIDCOM; | |
813a224f | 592 | |
b9db07fb | 593 | return 0; |
1da177e4 LT |
594 | } /* cypress_hidcom_startup */ |
595 | ||
596 | ||
813a224f | 597 | static int cypress_ca42v2_startup(struct usb_serial *serial) |
a5c44e29 LM |
598 | { |
599 | struct cypress_private *priv; | |
600 | ||
441b62c1 | 601 | dbg("%s", __func__); |
a5c44e29 LM |
602 | |
603 | if (generic_startup(serial)) { | |
441b62c1 | 604 | dbg("%s - Failed setting up port %d", __func__, |
a5c44e29 LM |
605 | serial->port[0]->number); |
606 | return 1; | |
607 | } | |
608 | ||
609 | priv = usb_get_serial_port_data(serial->port[0]); | |
610 | priv->chiptype = CT_CA42V2; | |
611 | ||
612 | return 0; | |
613 | } /* cypress_ca42v2_startup */ | |
614 | ||
615 | ||
813a224f | 616 | static void cypress_shutdown(struct usb_serial *serial) |
1da177e4 LT |
617 | { |
618 | struct cypress_private *priv; | |
619 | ||
813a224f | 620 | dbg("%s - port %d", __func__, serial->port[0]->number); |
1da177e4 LT |
621 | |
622 | /* all open ports are closed at this point */ | |
623 | ||
624 | priv = usb_get_serial_port_data(serial->port[0]); | |
625 | ||
626 | if (priv) { | |
627 | cypress_buf_free(priv->buf); | |
628 | kfree(priv); | |
629 | usb_set_serial_port_data(serial->port[0], NULL); | |
630 | } | |
631 | } | |
632 | ||
633 | ||
95da310e AC |
634 | static int cypress_open(struct tty_struct *tty, |
635 | struct usb_serial_port *port, struct file *filp) | |
1da177e4 LT |
636 | { |
637 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
638 | struct usb_serial *serial = port->serial; | |
639 | unsigned long flags; | |
640 | int result = 0; | |
641 | ||
441b62c1 | 642 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 643 | |
78aef519 MI |
644 | if (!priv->comm_is_ok) |
645 | return -EIO; | |
646 | ||
1da177e4 | 647 | /* clear halts before open */ |
1da177e4 LT |
648 | usb_clear_halt(serial->dev, 0x81); |
649 | usb_clear_halt(serial->dev, 0x02); | |
650 | ||
651 | spin_lock_irqsave(&priv->lock, flags); | |
652 | /* reset read/write statistics */ | |
653 | priv->bytes_in = 0; | |
654 | priv->bytes_out = 0; | |
655 | priv->cmd_count = 0; | |
656 | priv->rx_flags = 0; | |
657 | spin_unlock_irqrestore(&priv->lock, flags); | |
658 | ||
1da177e4 LT |
659 | /* raise both lines and set termios */ |
660 | spin_lock_irqsave(&priv->lock, flags); | |
661 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
1da177e4 LT |
662 | priv->cmd_ctrl = 1; |
663 | spin_unlock_irqrestore(&priv->lock, flags); | |
95da310e | 664 | result = cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
665 | |
666 | if (result) { | |
813a224f AC |
667 | dev_err(&port->dev, |
668 | "%s - failed setting the control lines - error %d\n", | |
669 | __func__, result); | |
1da177e4 LT |
670 | return result; |
671 | } else | |
441b62c1 | 672 | dbg("%s - success setting the control lines", __func__); |
1da177e4 | 673 | |
95da310e AC |
674 | if (tty) |
675 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
676 | |
677 | /* setup the port and start reading from the device */ | |
813a224f | 678 | if (!port->interrupt_in_urb) { |
194343d9 GKH |
679 | dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n", |
680 | __func__); | |
813a224f | 681 | return -1; |
1da177e4 LT |
682 | } |
683 | ||
684 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
685 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
686 | port->interrupt_in_urb->transfer_buffer, |
687 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 688 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
689 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
690 | ||
813a224f AC |
691 | if (result) { |
692 | dev_err(&port->dev, | |
693 | "%s - failed submitting read urb, error %d\n", | |
694 | __func__, result); | |
78aef519 | 695 | cypress_set_dead(port); |
1da177e4 LT |
696 | } |
697 | ||
698 | return result; | |
699 | } /* cypress_open */ | |
700 | ||
701 | ||
95da310e | 702 | static void cypress_close(struct tty_struct *tty, |
813a224f | 703 | struct usb_serial_port *port, struct file *filp) |
1da177e4 LT |
704 | { |
705 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
706 | unsigned int c_cflag; | |
1da177e4 LT |
707 | int bps; |
708 | long timeout; | |
709 | wait_queue_t wait; | |
710 | ||
441b62c1 | 711 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
712 | |
713 | /* wait for data to drain from buffer */ | |
9e3b1d8e | 714 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
715 | timeout = CYPRESS_CLOSING_WAIT; |
716 | init_waitqueue_entry(&wait, current); | |
95da310e | 717 | add_wait_queue(&tty->write_wait, &wait); |
1da177e4 LT |
718 | for (;;) { |
719 | set_current_state(TASK_INTERRUPTIBLE); | |
720 | if (cypress_buf_data_avail(priv->buf) == 0 | |
721 | || timeout == 0 || signal_pending(current) | |
9e3b1d8e ON |
722 | /* without mutex, allowed due to harmless failure mode */ |
723 | || port->serial->disconnected) | |
1da177e4 | 724 | break; |
9e3b1d8e | 725 | spin_unlock_irq(&priv->lock); |
1da177e4 | 726 | timeout = schedule_timeout(timeout); |
9e3b1d8e | 727 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
728 | } |
729 | set_current_state(TASK_RUNNING); | |
95da310e | 730 | remove_wait_queue(&tty->write_wait, &wait); |
1da177e4 LT |
731 | /* clear out any remaining data in the buffer */ |
732 | cypress_buf_clear(priv->buf); | |
9e3b1d8e ON |
733 | spin_unlock_irq(&priv->lock); |
734 | ||
735 | /* writing is potentially harmful, lock must be taken */ | |
736 | mutex_lock(&port->serial->disc_mutex); | |
737 | if (port->serial->disconnected) { | |
738 | mutex_unlock(&port->serial->disc_mutex); | |
739 | return; | |
740 | } | |
1da177e4 | 741 | /* wait for characters to drain from device */ |
95da310e AC |
742 | if (tty) { |
743 | bps = tty_get_baud_rate(tty); | |
744 | if (bps > 1200) | |
813a224f | 745 | timeout = max((HZ * 2560) / bps, HZ / 10); |
95da310e | 746 | else |
813a224f | 747 | timeout = 2 * HZ; |
95da310e AC |
748 | schedule_timeout_interruptible(timeout); |
749 | } | |
1da177e4 | 750 | |
441b62c1 | 751 | dbg("%s - stopping urbs", __func__); |
813a224f AC |
752 | usb_kill_urb(port->interrupt_in_urb); |
753 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 754 | |
95da310e AC |
755 | if (tty) { |
756 | c_cflag = tty->termios->c_cflag; | |
1da177e4 LT |
757 | if (c_cflag & HUPCL) { |
758 | /* drop dtr and rts */ | |
759 | priv = usb_get_serial_port_data(port); | |
9e3b1d8e | 760 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
761 | priv->line_control = 0; |
762 | priv->cmd_ctrl = 1; | |
9e3b1d8e | 763 | spin_unlock_irq(&priv->lock); |
95da310e | 764 | cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
765 | } |
766 | } | |
767 | ||
768 | if (stats) | |
813a224f AC |
769 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
770 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
9e3b1d8e | 771 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
772 | } /* cypress_close */ |
773 | ||
774 | ||
95da310e AC |
775 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
776 | const unsigned char *buf, int count) | |
1da177e4 LT |
777 | { |
778 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
779 | unsigned long flags; | |
813a224f | 780 | |
441b62c1 | 781 | dbg("%s - port %d, %d bytes", __func__, port->number, count); |
1da177e4 LT |
782 | |
783 | /* line control commands, which need to be executed immediately, | |
784 | are not put into the buffer for obvious reasons. | |
785 | */ | |
786 | if (priv->cmd_ctrl) { | |
787 | count = 0; | |
788 | goto finish; | |
789 | } | |
813a224f | 790 | |
1da177e4 LT |
791 | if (!count) |
792 | return count; | |
813a224f | 793 | |
1da177e4 LT |
794 | spin_lock_irqsave(&priv->lock, flags); |
795 | count = cypress_buf_put(priv->buf, buf, count); | |
796 | spin_unlock_irqrestore(&priv->lock, flags); | |
797 | ||
798 | finish: | |
799 | cypress_send(port); | |
800 | ||
801 | return count; | |
802 | } /* cypress_write */ | |
803 | ||
804 | ||
805 | static void cypress_send(struct usb_serial_port *port) | |
806 | { | |
807 | int count = 0, result, offset, actual_size; | |
808 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
809 | unsigned long flags; | |
813a224f | 810 | |
78aef519 MI |
811 | if (!priv->comm_is_ok) |
812 | return; | |
813 | ||
441b62c1 | 814 | dbg("%s - port %d", __func__, port->number); |
813a224f AC |
815 | dbg("%s - interrupt out size is %d", __func__, |
816 | port->interrupt_out_size); | |
817 | ||
1da177e4 LT |
818 | spin_lock_irqsave(&priv->lock, flags); |
819 | if (priv->write_urb_in_use) { | |
441b62c1 | 820 | dbg("%s - can't write, urb in use", __func__); |
1da177e4 LT |
821 | spin_unlock_irqrestore(&priv->lock, flags); |
822 | return; | |
823 | } | |
824 | spin_unlock_irqrestore(&priv->lock, flags); | |
825 | ||
826 | /* clear buffer */ | |
813a224f AC |
827 | memset(port->interrupt_out_urb->transfer_buffer, 0, |
828 | port->interrupt_out_size); | |
1da177e4 LT |
829 | |
830 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
831 | switch (priv->pkt_fmt) { |
832 | default: | |
833 | case packet_format_1: | |
834 | /* this is for the CY7C64013... */ | |
835 | offset = 2; | |
836 | port->interrupt_out_buffer[0] = priv->line_control; | |
837 | break; | |
838 | case packet_format_2: | |
839 | /* this is for the CY7C63743... */ | |
840 | offset = 1; | |
841 | port->interrupt_out_buffer[0] = priv->line_control; | |
842 | break; | |
1da177e4 LT |
843 | } |
844 | ||
845 | if (priv->line_control & CONTROL_RESET) | |
846 | priv->line_control &= ~CONTROL_RESET; | |
847 | ||
848 | if (priv->cmd_ctrl) { | |
849 | priv->cmd_count++; | |
441b62c1 | 850 | dbg("%s - line control command being issued", __func__); |
1da177e4 LT |
851 | spin_unlock_irqrestore(&priv->lock, flags); |
852 | goto send; | |
853 | } else | |
854 | spin_unlock_irqrestore(&priv->lock, flags); | |
855 | ||
856 | count = cypress_buf_get(priv->buf, &port->interrupt_out_buffer[offset], | |
857 | port->interrupt_out_size-offset); | |
858 | ||
813a224f | 859 | if (count == 0) |
1da177e4 | 860 | return; |
1da177e4 | 861 | |
3416eaa1 MI |
862 | switch (priv->pkt_fmt) { |
863 | default: | |
864 | case packet_format_1: | |
865 | port->interrupt_out_buffer[1] = count; | |
866 | break; | |
867 | case packet_format_2: | |
868 | port->interrupt_out_buffer[0] |= count; | |
1da177e4 LT |
869 | } |
870 | ||
441b62c1 | 871 | dbg("%s - count is %d", __func__, count); |
1da177e4 LT |
872 | |
873 | send: | |
874 | spin_lock_irqsave(&priv->lock, flags); | |
875 | priv->write_urb_in_use = 1; | |
876 | spin_unlock_irqrestore(&priv->lock, flags); | |
877 | ||
878 | if (priv->cmd_ctrl) | |
879 | actual_size = 1; | |
880 | else | |
3416eaa1 MI |
881 | actual_size = count + |
882 | (priv->pkt_fmt == packet_format_1 ? 2 : 1); | |
883 | ||
813a224f AC |
884 | usb_serial_debug_data(debug, &port->dev, __func__, |
885 | port->interrupt_out_size, | |
886 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 887 | |
9aa8dae7 MI |
888 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
889 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
890 | port->interrupt_out_buffer, port->interrupt_out_size, | |
891 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 892 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 893 | if (result) { |
813a224f AC |
894 | dev_err(&port->dev, |
895 | "%s - failed submitting write urb, error %d\n", | |
896 | __func__, result); | |
1da177e4 | 897 | priv->write_urb_in_use = 0; |
78aef519 | 898 | cypress_set_dead(port); |
1da177e4 LT |
899 | } |
900 | ||
901 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 902 | if (priv->cmd_ctrl) |
1da177e4 | 903 | priv->cmd_ctrl = 0; |
813a224f AC |
904 | |
905 | /* do not count the line control and size bytes */ | |
906 | priv->bytes_out += count; | |
1da177e4 LT |
907 | spin_unlock_irqrestore(&priv->lock, flags); |
908 | ||
cf2c7481 | 909 | usb_serial_port_softint(port); |
1da177e4 LT |
910 | } /* cypress_send */ |
911 | ||
912 | ||
913 | /* returns how much space is available in the soft buffer */ | |
95da310e | 914 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 915 | { |
95da310e | 916 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
917 | struct cypress_private *priv = usb_get_serial_port_data(port); |
918 | int room = 0; | |
919 | unsigned long flags; | |
920 | ||
441b62c1 | 921 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
922 | |
923 | spin_lock_irqsave(&priv->lock, flags); | |
924 | room = cypress_buf_space_avail(priv->buf); | |
925 | spin_unlock_irqrestore(&priv->lock, flags); | |
926 | ||
441b62c1 | 927 | dbg("%s - returns %d", __func__, room); |
1da177e4 LT |
928 | return room; |
929 | } | |
930 | ||
931 | ||
95da310e | 932 | static int cypress_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 933 | { |
95da310e | 934 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
935 | struct cypress_private *priv = usb_get_serial_port_data(port); |
936 | __u8 status, control; | |
937 | unsigned int result = 0; | |
938 | unsigned long flags; | |
813a224f | 939 | |
441b62c1 | 940 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
941 | |
942 | spin_lock_irqsave(&priv->lock, flags); | |
943 | control = priv->line_control; | |
944 | status = priv->current_status; | |
945 | spin_unlock_irqrestore(&priv->lock, flags); | |
946 | ||
947 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
948 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
949 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
950 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
951 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
952 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
953 | ||
441b62c1 | 954 | dbg("%s - result = %x", __func__, result); |
1da177e4 LT |
955 | |
956 | return result; | |
957 | } | |
958 | ||
959 | ||
95da310e | 960 | static int cypress_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
961 | unsigned int set, unsigned int clear) |
962 | { | |
95da310e | 963 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
964 | struct cypress_private *priv = usb_get_serial_port_data(port); |
965 | unsigned long flags; | |
813a224f | 966 | |
441b62c1 | 967 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
968 | |
969 | spin_lock_irqsave(&priv->lock, flags); | |
970 | if (set & TIOCM_RTS) | |
971 | priv->line_control |= CONTROL_RTS; | |
972 | if (set & TIOCM_DTR) | |
973 | priv->line_control |= CONTROL_DTR; | |
974 | if (clear & TIOCM_RTS) | |
975 | priv->line_control &= ~CONTROL_RTS; | |
976 | if (clear & TIOCM_DTR) | |
977 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 978 | priv->cmd_ctrl = 1; |
1da177e4 LT |
979 | spin_unlock_irqrestore(&priv->lock, flags); |
980 | ||
95da310e | 981 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
982 | } |
983 | ||
984 | ||
813a224f | 985 | static int cypress_ioctl(struct tty_struct *tty, struct file *file, |
95da310e | 986 | unsigned int cmd, unsigned long arg) |
1da177e4 | 987 | { |
95da310e | 988 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
989 | struct cypress_private *priv = usb_get_serial_port_data(port); |
990 | ||
441b62c1 | 991 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 LT |
992 | |
993 | switch (cmd) { | |
813a224f AC |
994 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ |
995 | case TIOCMIWAIT: | |
996 | while (priv != NULL) { | |
997 | interruptible_sleep_on(&priv->delta_msr_wait); | |
998 | /* see if a signal did it */ | |
999 | if (signal_pending(current)) | |
1000 | return -ERESTARTSYS; | |
1001 | else { | |
1002 | char diff = priv->diff_status; | |
1003 | if (diff == 0) | |
1004 | return -EIO; /* no change => error */ | |
1005 | ||
1006 | /* consume all events */ | |
1007 | priv->diff_status = 0; | |
1008 | ||
1009 | /* return 0 if caller wanted to know about | |
1010 | these bits */ | |
1011 | if (((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
1012 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
1013 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
1014 | ((arg & TIOCM_CTS) && (diff & UART_CTS))) | |
1015 | return 0; | |
1016 | /* otherwise caller can't care less about what | |
1017 | * happened, and so we continue to wait for | |
1018 | * more events. | |
1019 | */ | |
1da177e4 | 1020 | } |
813a224f AC |
1021 | } |
1022 | return 0; | |
1023 | default: | |
1024 | break; | |
1da177e4 | 1025 | } |
441b62c1 | 1026 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __func__, cmd); |
1da177e4 LT |
1027 | return -ENOIOCTLCMD; |
1028 | } /* cypress_ioctl */ | |
1029 | ||
1030 | ||
95da310e AC |
1031 | static void cypress_set_termios(struct tty_struct *tty, |
1032 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
1033 | { |
1034 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1da177e4 | 1035 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 1036 | unsigned cflag, iflag; |
1da177e4 LT |
1037 | unsigned long flags; |
1038 | __u8 oldlines; | |
3cb4a4f7 | 1039 | int linechange = 0; |
b9db07fb | 1040 | |
441b62c1 | 1041 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1042 | |
1da177e4 LT |
1043 | spin_lock_irqsave(&priv->lock, flags); |
1044 | if (!priv->termios_initialized) { | |
1045 | if (priv->chiptype == CT_EARTHMATE) { | |
1046 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
1047 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
1048 | CLOCAL; | |
8873aaa6 AC |
1049 | tty->termios->c_ispeed = 4800; |
1050 | tty->termios->c_ospeed = 4800; | |
1da177e4 LT |
1051 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
1052 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
1053 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
1054 | CLOCAL; | |
8873aaa6 AC |
1055 | tty->termios->c_ispeed = 9600; |
1056 | tty->termios->c_ospeed = 9600; | |
a5c44e29 LM |
1057 | } else if (priv->chiptype == CT_CA42V2) { |
1058 | *(tty->termios) = tty_std_termios; | |
1059 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1060 | CLOCAL; | |
8873aaa6 AC |
1061 | tty->termios->c_ispeed = 9600; |
1062 | tty->termios->c_ospeed = 9600; | |
1da177e4 LT |
1063 | } |
1064 | priv->termios_initialized = 1; | |
1065 | } | |
1066 | spin_unlock_irqrestore(&priv->lock, flags); | |
1067 | ||
8873aaa6 AC |
1068 | /* Unsupported features need clearing */ |
1069 | tty->termios->c_cflag &= ~(CMSPAR|CRTSCTS); | |
1070 | ||
1da177e4 LT |
1071 | cflag = tty->termios->c_cflag; |
1072 | iflag = tty->termios->c_iflag; | |
1073 | ||
1074 | /* check if there are new settings */ | |
1075 | if (old_termios) { | |
8873aaa6 AC |
1076 | spin_lock_irqsave(&priv->lock, flags); |
1077 | priv->tmp_termios = *(tty->termios); | |
1078 | spin_unlock_irqrestore(&priv->lock, flags); | |
1079 | } | |
1da177e4 LT |
1080 | |
1081 | /* set number of data bits, parity, stop bits */ | |
1082 | /* when parity is disabled the parity type bit is ignored */ | |
1083 | ||
b9db07fb LM |
1084 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
1085 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
1086 | ||
1da177e4 LT |
1087 | if (cflag & PARENB) { |
1088 | parity_enable = 1; | |
b9db07fb LM |
1089 | /* 1 means odd parity, 0 means even parity */ |
1090 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
1091 | } else |
1092 | parity_enable = parity_type = 0; | |
1093 | ||
77336828 AC |
1094 | switch (cflag & CSIZE) { |
1095 | case CS5: | |
1096 | data_bits = 0; | |
1097 | break; | |
1098 | case CS6: | |
1099 | data_bits = 1; | |
1100 | break; | |
1101 | case CS7: | |
1102 | data_bits = 2; | |
1103 | break; | |
1104 | case CS8: | |
1da177e4 | 1105 | data_bits = 3; |
77336828 AC |
1106 | break; |
1107 | default: | |
194343d9 GKH |
1108 | dev_err(&port->dev, "%s - CSIZE was set, but not CS5-CS8\n", |
1109 | __func__); | |
77336828 AC |
1110 | data_bits = 3; |
1111 | } | |
1da177e4 LT |
1112 | spin_lock_irqsave(&priv->lock, flags); |
1113 | oldlines = priv->line_control; | |
1114 | if ((cflag & CBAUD) == B0) { | |
1115 | /* drop dtr and rts */ | |
441b62c1 | 1116 | dbg("%s - dropping the lines, baud rate 0bps", __func__); |
1da177e4 | 1117 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 1118 | } else |
3cb4a4f7 | 1119 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 1120 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1121 | |
b9db07fb | 1122 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, " |
441b62c1 | 1123 | "%d data_bits (+5)", __func__, stop_bits, |
b9db07fb LM |
1124 | parity_enable, parity_type, data_bits); |
1125 | ||
813a224f AC |
1126 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
1127 | data_bits, stop_bits, | |
1128 | parity_enable, parity_type, | |
1129 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1130 | |
b9db07fb LM |
1131 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1132 | * filled into the private structure this should confirm that all is | |
1133 | * working if it returns what we just set */ | |
95da310e | 1134 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 1135 | |
b9db07fb LM |
1136 | /* Here we can define custom tty settings for devices; the main tty |
1137 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1138 | |
b9db07fb | 1139 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 1140 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
b9db07fb LM |
1141 | dbg("Using custom termios settings for a baud rate of " |
1142 | "4800bps."); | |
1da177e4 LT |
1143 | /* define custom termios settings for NMEA protocol */ |
1144 | ||
1da177e4 | 1145 | tty->termios->c_iflag /* input modes - */ |
b9db07fb LM |
1146 | &= ~(IGNBRK /* disable ignore break */ |
1147 | | BRKINT /* disable break causes interrupt */ | |
1148 | | PARMRK /* disable mark parity errors */ | |
1149 | | ISTRIP /* disable clear high bit of input char */ | |
1150 | | INLCR /* disable translate NL to CR */ | |
1151 | | IGNCR /* disable ignore CR */ | |
1152 | | ICRNL /* disable translate CR to NL */ | |
1153 | | IXON); /* disable enable XON/XOFF flow control */ | |
1154 | ||
1da177e4 | 1155 | tty->termios->c_oflag /* output modes */ |
b9db07fb | 1156 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1157 | |
b9db07fb LM |
1158 | tty->termios->c_lflag /* line discipline modes */ |
1159 | &= ~(ECHO /* disable echo input characters */ | |
1160 | | ECHONL /* disable echo new line */ | |
1161 | | ICANON /* disable erase, kill, werase, and rprnt | |
1162 | special characters */ | |
1163 | | ISIG /* disable interrupt, quit, and suspend | |
1164 | special characters */ | |
1165 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1166 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1167 | |
1da177e4 LT |
1168 | linechange = (priv->line_control != oldlines); |
1169 | spin_unlock_irqrestore(&priv->lock, flags); | |
1170 | ||
1171 | /* if necessary, set lines */ | |
3cb4a4f7 | 1172 | if (linechange) { |
1da177e4 | 1173 | priv->cmd_ctrl = 1; |
95da310e | 1174 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1175 | } |
1da177e4 LT |
1176 | } /* cypress_set_termios */ |
1177 | ||
b9db07fb | 1178 | |
1da177e4 | 1179 | /* returns amount of data still left in soft buffer */ |
95da310e | 1180 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1181 | { |
95da310e | 1182 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1183 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1184 | int chars = 0; | |
1185 | unsigned long flags; | |
1186 | ||
441b62c1 | 1187 | dbg("%s - port %d", __func__, port->number); |
813a224f | 1188 | |
1da177e4 LT |
1189 | spin_lock_irqsave(&priv->lock, flags); |
1190 | chars = cypress_buf_data_avail(priv->buf); | |
1191 | spin_unlock_irqrestore(&priv->lock, flags); | |
1192 | ||
441b62c1 | 1193 | dbg("%s - returns %d", __func__, chars); |
1da177e4 LT |
1194 | return chars; |
1195 | } | |
1196 | ||
1197 | ||
95da310e | 1198 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1199 | { |
95da310e | 1200 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1201 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1202 | unsigned long flags; | |
1203 | ||
441b62c1 | 1204 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1205 | |
1206 | spin_lock_irqsave(&priv->lock, flags); | |
1207 | priv->rx_flags = THROTTLED; | |
b9db07fb | 1208 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1209 | } |
1210 | ||
1211 | ||
95da310e | 1212 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1213 | { |
95da310e | 1214 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1215 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1216 | int actually_throttled, result; | |
1217 | unsigned long flags; | |
1218 | ||
441b62c1 | 1219 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
1220 | |
1221 | spin_lock_irqsave(&priv->lock, flags); | |
1222 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; | |
1223 | priv->rx_flags = 0; | |
1224 | spin_unlock_irqrestore(&priv->lock, flags); | |
1225 | ||
78aef519 MI |
1226 | if (!priv->comm_is_ok) |
1227 | return; | |
1228 | ||
1da177e4 LT |
1229 | if (actually_throttled) { |
1230 | port->interrupt_in_urb->dev = port->serial->dev; | |
1231 | ||
1232 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); | |
78aef519 | 1233 | if (result) { |
b9db07fb | 1234 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1235 | "error %d\n", __func__, result); |
78aef519 MI |
1236 | cypress_set_dead(port); |
1237 | } | |
1da177e4 LT |
1238 | } |
1239 | } | |
1240 | ||
1241 | ||
7d12e780 | 1242 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1243 | { |
cdc97792 | 1244 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1245 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1246 | struct tty_struct *tty; | |
1247 | unsigned char *data = urb->transfer_buffer; | |
1248 | unsigned long flags; | |
b9db07fb | 1249 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1250 | int havedata = 0; |
1251 | int bytes = 0; | |
1252 | int result; | |
1253 | int i = 0; | |
8d7bc55e | 1254 | int status = urb->status; |
1da177e4 | 1255 | |
441b62c1 | 1256 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1257 | |
8d7bc55e | 1258 | switch (status) { |
78aef519 MI |
1259 | case 0: /* success */ |
1260 | break; | |
1261 | case -ECONNRESET: | |
1262 | case -ENOENT: | |
1263 | case -ESHUTDOWN: | |
1264 | /* precursor to disconnect so just go away */ | |
1265 | return; | |
1266 | case -EPIPE: | |
813a224f | 1267 | usb_clear_halt(port->serial->dev, 0x81); |
78aef519 MI |
1268 | break; |
1269 | default: | |
1270 | /* something ugly is going on... */ | |
813a224f AC |
1271 | dev_err(&urb->dev->dev, |
1272 | "%s - unexpected nonzero read status received: %d\n", | |
1273 | __func__, status); | |
78aef519 | 1274 | cypress_set_dead(port); |
1da177e4 LT |
1275 | return; |
1276 | } | |
1277 | ||
1278 | spin_lock_irqsave(&priv->lock, flags); | |
1279 | if (priv->rx_flags & THROTTLED) { | |
441b62c1 | 1280 | dbg("%s - now throttling", __func__); |
1da177e4 LT |
1281 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1282 | spin_unlock_irqrestore(&priv->lock, flags); | |
1283 | return; | |
1284 | } | |
1285 | spin_unlock_irqrestore(&priv->lock, flags); | |
1286 | ||
4a90f09b | 1287 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1288 | if (!tty) { |
441b62c1 | 1289 | dbg("%s - bad tty pointer - exiting", __func__); |
1da177e4 LT |
1290 | return; |
1291 | } | |
1292 | ||
1293 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1294 | result = urb->actual_length; |
1295 | switch (priv->pkt_fmt) { | |
1296 | default: | |
1297 | case packet_format_1: | |
1298 | /* This is for the CY7C64013... */ | |
1299 | priv->current_status = data[0] & 0xF8; | |
1300 | bytes = data[1] + 2; | |
1301 | i = 2; | |
1302 | if (bytes > 2) | |
1303 | havedata = 1; | |
1304 | break; | |
1305 | case packet_format_2: | |
1306 | /* This is for the CY7C63743... */ | |
1307 | priv->current_status = data[0] & 0xF8; | |
1308 | bytes = (data[0] & 0x07) + 1; | |
1309 | i = 1; | |
1310 | if (bytes > 1) | |
1311 | havedata = 1; | |
1312 | break; | |
1da177e4 LT |
1313 | } |
1314 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 MI |
1315 | if (result < bytes) { |
1316 | dbg("%s - wrong packet size - received %d bytes but packet " | |
1317 | "said %d bytes", __func__, result, bytes); | |
1318 | goto continue_read; | |
1319 | } | |
1da177e4 | 1320 | |
813a224f AC |
1321 | usb_serial_debug_data(debug, &port->dev, __func__, |
1322 | urb->actual_length, data); | |
1da177e4 LT |
1323 | |
1324 | spin_lock_irqsave(&priv->lock, flags); | |
1325 | /* check to see if status has changed */ | |
6768306c MI |
1326 | if (priv->current_status != priv->prev_status) { |
1327 | priv->diff_status |= priv->current_status ^ | |
1328 | priv->prev_status; | |
1329 | wake_up_interruptible(&priv->delta_msr_wait); | |
1330 | priv->prev_status = priv->current_status; | |
1da177e4 | 1331 | } |
b9db07fb | 1332 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1333 | |
b9db07fb LM |
1334 | /* hangup, as defined in acm.c... this might be a bad place for it |
1335 | * though */ | |
1336 | if (tty && !(tty->termios->c_cflag & CLOCAL) && | |
1337 | !(priv->current_status & UART_CD)) { | |
441b62c1 | 1338 | dbg("%s - calling hangup", __func__); |
1da177e4 LT |
1339 | tty_hangup(tty); |
1340 | goto continue_read; | |
1341 | } | |
1342 | ||
b9db07fb LM |
1343 | /* There is one error bit... I'm assuming it is a parity error |
1344 | * indicator as the generic firmware will set this bit to 1 if a | |
1345 | * parity error occurs. | |
1346 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1347 | spin_lock_irqsave(&priv->lock, flags); |
1348 | if (priv->current_status & CYP_ERROR) { | |
1349 | spin_unlock_irqrestore(&priv->lock, flags); | |
1350 | tty_flag = TTY_PARITY; | |
441b62c1 | 1351 | dbg("%s - Parity Error detected", __func__); |
1da177e4 LT |
1352 | } else |
1353 | spin_unlock_irqrestore(&priv->lock, flags); | |
1354 | ||
1355 | /* process read if there is data other than line status */ | |
1356 | if (tty && (bytes > i)) { | |
33f0f88f | 1357 | bytes = tty_buffer_request_room(tty, bytes); |
1da177e4 | 1358 | for (; i < bytes ; ++i) { |
b9db07fb LM |
1359 | dbg("pushing byte number %d - %d - %c", i, data[i], |
1360 | data[i]); | |
1da177e4 LT |
1361 | tty_insert_flip_char(tty, data[i], tty_flag); |
1362 | } | |
4a90f09b | 1363 | tty_flip_buffer_push(tty); |
1da177e4 LT |
1364 | } |
1365 | ||
1366 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1367 | /* control and status byte(s) are also counted */ |
1368 | priv->bytes_in += bytes; | |
1da177e4 LT |
1369 | spin_unlock_irqrestore(&priv->lock, flags); |
1370 | ||
1371 | continue_read: | |
4a90f09b | 1372 | tty_kref_put(tty); |
b9db07fb LM |
1373 | |
1374 | /* Continue trying to always read... unless the port has closed. */ | |
1da177e4 | 1375 | |
95da310e | 1376 | if (port->port.count > 0 && priv->comm_is_ok) { |
b9db07fb LM |
1377 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1378 | usb_rcvintpipe(port->serial->dev, | |
1379 | port->interrupt_in_endpointAddress), | |
1380 | port->interrupt_in_urb->transfer_buffer, | |
1381 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1382 | cypress_read_int_callback, port, |
1383 | priv->read_urb_interval); | |
b9db07fb | 1384 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
78aef519 | 1385 | if (result) { |
b9db07fb | 1386 | dev_err(&urb->dev->dev, "%s - failed resubmitting " |
441b62c1 | 1387 | "read urb, error %d\n", __func__, |
b9db07fb | 1388 | result); |
78aef519 MI |
1389 | cypress_set_dead(port); |
1390 | } | |
1da177e4 | 1391 | } |
b9db07fb | 1392 | |
1da177e4 LT |
1393 | return; |
1394 | } /* cypress_read_int_callback */ | |
1395 | ||
1396 | ||
7d12e780 | 1397 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1398 | { |
cdc97792 | 1399 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1400 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1401 | int result; | |
8d7bc55e | 1402 | int status = urb->status; |
1da177e4 | 1403 | |
441b62c1 | 1404 | dbg("%s - port %d", __func__, port->number); |
8d7bc55e GKH |
1405 | |
1406 | switch (status) { | |
813a224f AC |
1407 | case 0: |
1408 | /* success */ | |
1409 | break; | |
1410 | case -ECONNRESET: | |
1411 | case -ENOENT: | |
1412 | case -ESHUTDOWN: | |
1413 | /* this urb is terminated, clean up */ | |
1414 | dbg("%s - urb shutting down with status: %d", | |
1415 | __func__, status); | |
1416 | priv->write_urb_in_use = 0; | |
1417 | return; | |
1418 | case -EPIPE: /* no break needed; clear halt and resubmit */ | |
1419 | if (!priv->comm_is_ok) | |
1da177e4 | 1420 | break; |
813a224f AC |
1421 | usb_clear_halt(port->serial->dev, 0x02); |
1422 | /* error in the urb, so we have to resubmit it */ | |
1423 | dbg("%s - nonzero write bulk status received: %d", | |
1424 | __func__, status); | |
1425 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
1426 | port->interrupt_out_urb->dev = port->serial->dev; | |
1427 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); | |
1428 | if (!result) | |
1da177e4 | 1429 | return; |
813a224f AC |
1430 | dev_err(&urb->dev->dev, |
1431 | "%s - failed resubmitting write urb, error %d\n", | |
1432 | __func__, result); | |
1433 | cypress_set_dead(port); | |
1434 | break; | |
1435 | default: | |
1436 | dev_err(&urb->dev->dev, | |
1437 | "%s - unexpected nonzero write status received: %d\n", | |
1438 | __func__, status); | |
1439 | cypress_set_dead(port); | |
1440 | break; | |
1da177e4 | 1441 | } |
1da177e4 | 1442 | priv->write_urb_in_use = 0; |
813a224f | 1443 | |
1da177e4 LT |
1444 | /* send any buffered data */ |
1445 | cypress_send(port); | |
1446 | } | |
1447 | ||
1448 | ||
1449 | /***************************************************************************** | |
1450 | * Write buffer functions - buffering code from pl2303 used | |
1451 | *****************************************************************************/ | |
1452 | ||
1453 | /* | |
1454 | * cypress_buf_alloc | |
1455 | * | |
1456 | * Allocate a circular buffer and all associated memory. | |
1457 | */ | |
1458 | ||
1459 | static struct cypress_buf *cypress_buf_alloc(unsigned int size) | |
1460 | { | |
1461 | ||
1462 | struct cypress_buf *cb; | |
1463 | ||
1464 | ||
1465 | if (size == 0) | |
1466 | return NULL; | |
1467 | ||
5cbded58 | 1468 | cb = kmalloc(sizeof(struct cypress_buf), GFP_KERNEL); |
1da177e4 LT |
1469 | if (cb == NULL) |
1470 | return NULL; | |
1471 | ||
1472 | cb->buf_buf = kmalloc(size, GFP_KERNEL); | |
1473 | if (cb->buf_buf == NULL) { | |
1474 | kfree(cb); | |
1475 | return NULL; | |
1476 | } | |
1477 | ||
1478 | cb->buf_size = size; | |
1479 | cb->buf_get = cb->buf_put = cb->buf_buf; | |
1480 | ||
1481 | return cb; | |
1482 | ||
1483 | } | |
1484 | ||
1485 | ||
1486 | /* | |
1487 | * cypress_buf_free | |
1488 | * | |
1489 | * Free the buffer and all associated memory. | |
1490 | */ | |
1491 | ||
1492 | static void cypress_buf_free(struct cypress_buf *cb) | |
1493 | { | |
1bc3c9e1 JJ |
1494 | if (cb) { |
1495 | kfree(cb->buf_buf); | |
1da177e4 LT |
1496 | kfree(cb); |
1497 | } | |
1498 | } | |
1499 | ||
1500 | ||
1501 | /* | |
1502 | * cypress_buf_clear | |
1503 | * | |
1504 | * Clear out all data in the circular buffer. | |
1505 | */ | |
1506 | ||
1507 | static void cypress_buf_clear(struct cypress_buf *cb) | |
1508 | { | |
1509 | if (cb != NULL) | |
1510 | cb->buf_get = cb->buf_put; | |
1511 | /* equivalent to a get of all data available */ | |
1512 | } | |
1513 | ||
1514 | ||
1515 | /* | |
1516 | * cypress_buf_data_avail | |
1517 | * | |
1518 | * Return the number of bytes of data available in the circular | |
1519 | * buffer. | |
1520 | */ | |
1521 | ||
1522 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb) | |
1523 | { | |
1524 | if (cb != NULL) | |
813a224f AC |
1525 | return (cb->buf_size + cb->buf_put - cb->buf_get) |
1526 | % cb->buf_size; | |
1da177e4 LT |
1527 | else |
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | ||
1532 | /* | |
1533 | * cypress_buf_space_avail | |
1534 | * | |
1535 | * Return the number of bytes of space available in the circular | |
1536 | * buffer. | |
1537 | */ | |
1538 | ||
1539 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb) | |
1540 | { | |
1541 | if (cb != NULL) | |
813a224f AC |
1542 | return (cb->buf_size + cb->buf_get - cb->buf_put - 1) |
1543 | % cb->buf_size; | |
1da177e4 LT |
1544 | else |
1545 | return 0; | |
1546 | } | |
1547 | ||
1548 | ||
1549 | /* | |
1550 | * cypress_buf_put | |
1551 | * | |
1552 | * Copy data data from a user buffer and put it into the circular buffer. | |
1553 | * Restrict to the amount of space available. | |
1554 | * | |
1555 | * Return the number of bytes copied. | |
1556 | */ | |
1557 | ||
1558 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, | |
1559 | unsigned int count) | |
1560 | { | |
1561 | ||
1562 | unsigned int len; | |
1563 | ||
1564 | ||
1565 | if (cb == NULL) | |
1566 | return 0; | |
1567 | ||
1568 | len = cypress_buf_space_avail(cb); | |
1569 | if (count > len) | |
1570 | count = len; | |
1571 | ||
1572 | if (count == 0) | |
1573 | return 0; | |
1574 | ||
1575 | len = cb->buf_buf + cb->buf_size - cb->buf_put; | |
1576 | if (count > len) { | |
1577 | memcpy(cb->buf_put, buf, len); | |
1578 | memcpy(cb->buf_buf, buf+len, count - len); | |
1579 | cb->buf_put = cb->buf_buf + count - len; | |
1580 | } else { | |
1581 | memcpy(cb->buf_put, buf, count); | |
1582 | if (count < len) | |
1583 | cb->buf_put += count; | |
1584 | else /* count == len */ | |
1585 | cb->buf_put = cb->buf_buf; | |
1586 | } | |
1587 | ||
1588 | return count; | |
1589 | ||
1590 | } | |
1591 | ||
1592 | ||
1593 | /* | |
1594 | * cypress_buf_get | |
1595 | * | |
1596 | * Get data from the circular buffer and copy to the given buffer. | |
1597 | * Restrict to the amount of data available. | |
1598 | * | |
1599 | * Return the number of bytes copied. | |
1600 | */ | |
1601 | ||
1602 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, | |
1603 | unsigned int count) | |
1604 | { | |
1605 | ||
1606 | unsigned int len; | |
1607 | ||
1608 | ||
1609 | if (cb == NULL) | |
1610 | return 0; | |
1611 | ||
1612 | len = cypress_buf_data_avail(cb); | |
1613 | if (count > len) | |
1614 | count = len; | |
1615 | ||
1616 | if (count == 0) | |
1617 | return 0; | |
1618 | ||
1619 | len = cb->buf_buf + cb->buf_size - cb->buf_get; | |
1620 | if (count > len) { | |
1621 | memcpy(buf, cb->buf_get, len); | |
1622 | memcpy(buf+len, cb->buf_buf, count - len); | |
1623 | cb->buf_get = cb->buf_buf + count - len; | |
1624 | } else { | |
1625 | memcpy(buf, cb->buf_get, count); | |
1626 | if (count < len) | |
1627 | cb->buf_get += count; | |
1628 | else /* count == len */ | |
1629 | cb->buf_get = cb->buf_buf; | |
1630 | } | |
1631 | ||
1632 | return count; | |
1633 | ||
1634 | } | |
1635 | ||
1636 | /***************************************************************************** | |
1637 | * Module functions | |
1638 | *****************************************************************************/ | |
1639 | ||
1640 | static int __init cypress_init(void) | |
1641 | { | |
1642 | int retval; | |
813a224f | 1643 | |
441b62c1 | 1644 | dbg("%s", __func__); |
813a224f | 1645 | |
1da177e4 LT |
1646 | retval = usb_serial_register(&cypress_earthmate_device); |
1647 | if (retval) | |
1648 | goto failed_em_register; | |
1649 | retval = usb_serial_register(&cypress_hidcom_device); | |
1650 | if (retval) | |
1651 | goto failed_hidcom_register; | |
a5c44e29 LM |
1652 | retval = usb_serial_register(&cypress_ca42v2_device); |
1653 | if (retval) | |
1654 | goto failed_ca42v2_register; | |
1da177e4 LT |
1655 | retval = usb_register(&cypress_driver); |
1656 | if (retval) | |
1657 | goto failed_usb_register; | |
1658 | ||
c197a8db GKH |
1659 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1660 | DRIVER_DESC "\n"); | |
1da177e4 | 1661 | return 0; |
2e46b748 | 1662 | |
1da177e4 | 1663 | failed_usb_register: |
a5c44e29 | 1664 | usb_serial_deregister(&cypress_ca42v2_device); |
2e46b748 | 1665 | failed_ca42v2_register: |
1da177e4 | 1666 | usb_serial_deregister(&cypress_hidcom_device); |
2e46b748 | 1667 | failed_hidcom_register: |
1da177e4 | 1668 | usb_serial_deregister(&cypress_earthmate_device); |
2e46b748 | 1669 | failed_em_register: |
1da177e4 LT |
1670 | return retval; |
1671 | } | |
1672 | ||
1673 | ||
813a224f | 1674 | static void __exit cypress_exit(void) |
1da177e4 | 1675 | { |
441b62c1 | 1676 | dbg("%s", __func__); |
1da177e4 | 1677 | |
813a224f AC |
1678 | usb_deregister(&cypress_driver); |
1679 | usb_serial_deregister(&cypress_earthmate_device); | |
1680 | usb_serial_deregister(&cypress_hidcom_device); | |
1681 | usb_serial_deregister(&cypress_ca42v2_device); | |
1da177e4 LT |
1682 | } |
1683 | ||
1684 | ||
1685 | module_init(cypress_init); | |
1686 | module_exit(cypress_exit); | |
1687 | ||
813a224f AC |
1688 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1689 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1690 | MODULE_VERSION(DRIVER_VERSION); | |
1da177e4 LT |
1691 | MODULE_LICENSE("GPL"); |
1692 | ||
1693 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1694 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1695 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1696 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1697 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1698 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); |