Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * USB Cypress M8 driver | |
3 | * | |
4 | * Copyright (C) 2004 | |
5 | * Lonnie Mendez (dignome@gmail.com) | |
6 | * Copyright (C) 2003,2004 | |
7 | * Neil Whelchel (koyama@firstlight.net) | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * See Documentation/usb/usb-serial.txt for more information on using this driver | |
15 | * | |
16 | * See http://geocities.com/i0xox0i for information on this driver and the | |
17 | * earthmate usb device. | |
18 | * | |
3cb4a4f7 LM |
19 | * Lonnie Mendez <dignome@gmail.com> |
20 | * 4-29-2005 | |
21 | * Fixed problem where setting or retreiving the serial config would fail with | |
22 | * EPIPE. Removed CRTS toggling so the driver behaves more like other usbserial | |
23 | * adapters. Issued new interval of 1ms instead of the default 10ms. As a | |
24 | * result, transfer speed has been substantially increased. From avg. 850bps to | |
25 | * avg. 3300bps. initial termios has also been modified. Cleaned up code and | |
26 | * formatting issues so it is more readable. Replaced the C++ style comments. | |
1da177e4 LT |
27 | * |
28 | * Lonnie Mendez <dignome@gmail.com> | |
29 | * 12-15-2004 | |
30 | * Incorporated write buffering from pl2303 driver. Fixed bug with line | |
31 | * handling so both lines are raised in cypress_open. (was dropping rts) | |
32 | * Various code cleanups made as well along with other misc bug fixes. | |
33 | * | |
34 | * Lonnie Mendez <dignome@gmail.com> | |
35 | * 04-10-2004 | |
36 | * Driver modified to support dynamic line settings. Various improvments | |
37 | * and features. | |
38 | * | |
39 | * Neil Whelchel | |
40 | * 10-2003 | |
41 | * Driver first released. | |
42 | * | |
1da177e4 LT |
43 | */ |
44 | ||
45 | /* Thanks to Neil Whelchel for writing the first cypress m8 implementation for linux. */ | |
46 | /* Thanks to cypress for providing references for the hid reports. */ | |
47 | /* Thanks to Jiang Zhang for providing links and for general help. */ | |
48 | /* Code originates and was built up from ftdi_sio, belkin, pl2303 and others. */ | |
49 | ||
50 | ||
51 | #include <linux/config.h> | |
52 | #include <linux/kernel.h> | |
53 | #include <linux/errno.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/slab.h> | |
56 | #include <linux/tty.h> | |
57 | #include <linux/tty_driver.h> | |
58 | #include <linux/tty_flip.h> | |
59 | #include <linux/module.h> | |
60 | #include <linux/moduleparam.h> | |
61 | #include <linux/spinlock.h> | |
62 | #include <linux/usb.h> | |
63 | #include <linux/serial.h> | |
64 | #include <linux/delay.h> | |
65 | #include <asm/uaccess.h> | |
66 | ||
67 | #include "usb-serial.h" | |
68 | #include "cypress_m8.h" | |
69 | ||
70 | ||
71 | #ifdef CONFIG_USB_SERIAL_DEBUG | |
72 | static int debug = 1; | |
73 | #else | |
74 | static int debug; | |
75 | #endif | |
76 | static int stats; | |
3cb4a4f7 | 77 | static int interval; |
1da177e4 LT |
78 | |
79 | /* | |
80 | * Version Information | |
81 | */ | |
3cb4a4f7 | 82 | #define DRIVER_VERSION "v1.09" |
1da177e4 LT |
83 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
84 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
85 | ||
86 | /* write buffer size defines */ | |
87 | #define CYPRESS_BUF_SIZE 1024 | |
88 | #define CYPRESS_CLOSING_WAIT (30*HZ) | |
89 | ||
90 | static struct usb_device_id id_table_earthmate [] = { | |
91 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
25b6f08e | 92 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
93 | { } /* Terminating entry */ |
94 | }; | |
95 | ||
96 | static struct usb_device_id id_table_cyphidcomrs232 [] = { | |
97 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, | |
98 | { } /* Terminating entry */ | |
99 | }; | |
100 | ||
a5c44e29 LM |
101 | static struct usb_device_id id_table_nokiaca42v2 [] = { |
102 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, | |
103 | { } /* Terminating entry */ | |
104 | }; | |
105 | ||
1da177e4 LT |
106 | static struct usb_device_id id_table_combined [] = { |
107 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
25b6f08e | 108 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 109 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
a5c44e29 | 110 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
111 | { } /* Terminating entry */ |
112 | }; | |
113 | ||
114 | MODULE_DEVICE_TABLE (usb, id_table_combined); | |
115 | ||
116 | static struct usb_driver cypress_driver = { | |
117 | .name = "cypress", | |
118 | .probe = usb_serial_probe, | |
119 | .disconnect = usb_serial_disconnect, | |
120 | .id_table = id_table_combined, | |
ba9dc657 | 121 | .no_dynamic_id = 1, |
1da177e4 LT |
122 | }; |
123 | ||
124 | struct cypress_private { | |
125 | spinlock_t lock; /* private lock */ | |
126 | int chiptype; /* identifier of device, for quirks/etc */ | |
127 | int bytes_in; /* used for statistics */ | |
128 | int bytes_out; /* used for statistics */ | |
129 | int cmd_count; /* used for statistics */ | |
130 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
131 | struct cypress_buf *buf; /* write buffer */ | |
132 | int write_urb_in_use; /* write urb in use indicator */ | |
133 | int termios_initialized; | |
134 | __u8 line_control; /* holds dtr / rts value */ | |
135 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
136 | __u8 current_config; /* stores the current configuration byte */ | |
137 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
138 | int baud_rate; /* stores current baud rate in integer form */ | |
139 | int cbr_mask; /* stores current baud rate in masked form */ | |
140 | int isthrottled; /* if throttled, discard reads */ | |
141 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
142 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
143 | /* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */ | |
144 | struct termios tmp_termios; /* stores the old termios settings */ | |
1da177e4 LT |
145 | }; |
146 | ||
147 | /* write buffer structure */ | |
148 | struct cypress_buf { | |
149 | unsigned int buf_size; | |
150 | char *buf_buf; | |
151 | char *buf_get; | |
152 | char *buf_put; | |
153 | }; | |
154 | ||
155 | /* function prototypes for the Cypress USB to serial device */ | |
156 | static int cypress_earthmate_startup (struct usb_serial *serial); | |
157 | static int cypress_hidcom_startup (struct usb_serial *serial); | |
a5c44e29 | 158 | static int cypress_ca42v2_startup (struct usb_serial *serial); |
1da177e4 LT |
159 | static void cypress_shutdown (struct usb_serial *serial); |
160 | static int cypress_open (struct usb_serial_port *port, struct file *filp); | |
161 | static void cypress_close (struct usb_serial_port *port, struct file *filp); | |
162 | static int cypress_write (struct usb_serial_port *port, const unsigned char *buf, int count); | |
163 | static void cypress_send (struct usb_serial_port *port); | |
164 | static int cypress_write_room (struct usb_serial_port *port); | |
165 | static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); | |
166 | static void cypress_set_termios (struct usb_serial_port *port, struct termios * old); | |
167 | static int cypress_tiocmget (struct usb_serial_port *port, struct file *file); | |
168 | static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); | |
169 | static int cypress_chars_in_buffer (struct usb_serial_port *port); | |
170 | static void cypress_throttle (struct usb_serial_port *port); | |
171 | static void cypress_unthrottle (struct usb_serial_port *port); | |
172 | static void cypress_read_int_callback (struct urb *urb, struct pt_regs *regs); | |
173 | static void cypress_write_int_callback (struct urb *urb, struct pt_regs *regs); | |
174 | /* baud helper functions */ | |
175 | static int mask_to_rate (unsigned mask); | |
176 | static unsigned rate_to_mask (int rate); | |
177 | /* write buffer functions */ | |
178 | static struct cypress_buf *cypress_buf_alloc(unsigned int size); | |
179 | static void cypress_buf_free(struct cypress_buf *cb); | |
180 | static void cypress_buf_clear(struct cypress_buf *cb); | |
181 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb); | |
182 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb); | |
3cb4a4f7 LM |
183 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, unsigned int count); |
184 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, unsigned int count); | |
1da177e4 LT |
185 | |
186 | ||
ea65370d | 187 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
188 | .driver = { |
189 | .owner = THIS_MODULE, | |
269bda1c | 190 | .name = "earthmate", |
18fcac35 | 191 | }, |
269bda1c | 192 | .description = "DeLorme Earthmate USB", |
1da177e4 LT |
193 | .id_table = id_table_earthmate, |
194 | .num_interrupt_in = 1, | |
195 | .num_interrupt_out = 1, | |
196 | .num_bulk_in = NUM_DONT_CARE, | |
197 | .num_bulk_out = NUM_DONT_CARE, | |
198 | .num_ports = 1, | |
199 | .attach = cypress_earthmate_startup, | |
200 | .shutdown = cypress_shutdown, | |
201 | .open = cypress_open, | |
202 | .close = cypress_close, | |
203 | .write = cypress_write, | |
204 | .write_room = cypress_write_room, | |
205 | .ioctl = cypress_ioctl, | |
206 | .set_termios = cypress_set_termios, | |
207 | .tiocmget = cypress_tiocmget, | |
208 | .tiocmset = cypress_tiocmset, | |
209 | .chars_in_buffer = cypress_chars_in_buffer, | |
210 | .throttle = cypress_throttle, | |
211 | .unthrottle = cypress_unthrottle, | |
212 | .read_int_callback = cypress_read_int_callback, | |
213 | .write_int_callback = cypress_write_int_callback, | |
214 | }; | |
215 | ||
ea65370d | 216 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
217 | .driver = { |
218 | .owner = THIS_MODULE, | |
269bda1c | 219 | .name = "cyphidcom", |
18fcac35 | 220 | }, |
269bda1c | 221 | .description = "HID->COM RS232 Adapter", |
1da177e4 LT |
222 | .id_table = id_table_cyphidcomrs232, |
223 | .num_interrupt_in = 1, | |
224 | .num_interrupt_out = 1, | |
225 | .num_bulk_in = NUM_DONT_CARE, | |
226 | .num_bulk_out = NUM_DONT_CARE, | |
227 | .num_ports = 1, | |
228 | .attach = cypress_hidcom_startup, | |
229 | .shutdown = cypress_shutdown, | |
230 | .open = cypress_open, | |
231 | .close = cypress_close, | |
232 | .write = cypress_write, | |
233 | .write_room = cypress_write_room, | |
234 | .ioctl = cypress_ioctl, | |
235 | .set_termios = cypress_set_termios, | |
236 | .tiocmget = cypress_tiocmget, | |
237 | .tiocmset = cypress_tiocmset, | |
238 | .chars_in_buffer = cypress_chars_in_buffer, | |
239 | .throttle = cypress_throttle, | |
240 | .unthrottle = cypress_unthrottle, | |
241 | .read_int_callback = cypress_read_int_callback, | |
242 | .write_int_callback = cypress_write_int_callback, | |
243 | }; | |
244 | ||
a5c44e29 LM |
245 | static struct usb_serial_driver cypress_ca42v2_device = { |
246 | .driver = { | |
247 | .owner = THIS_MODULE, | |
248 | .name = "nokiaca42v2", | |
249 | }, | |
250 | .description = "Nokia CA-42 V2 Adapter", | |
251 | .id_table = id_table_nokiaca42v2, | |
252 | .num_interrupt_in = 1, | |
253 | .num_interrupt_out = 1, | |
254 | .num_bulk_in = NUM_DONT_CARE, | |
255 | .num_bulk_out = NUM_DONT_CARE, | |
256 | .num_ports = 1, | |
257 | .attach = cypress_ca42v2_startup, | |
258 | .shutdown = cypress_shutdown, | |
259 | .open = cypress_open, | |
260 | .close = cypress_close, | |
261 | .write = cypress_write, | |
262 | .write_room = cypress_write_room, | |
263 | .ioctl = cypress_ioctl, | |
264 | .set_termios = cypress_set_termios, | |
265 | .tiocmget = cypress_tiocmget, | |
266 | .tiocmset = cypress_tiocmset, | |
267 | .chars_in_buffer = cypress_chars_in_buffer, | |
268 | .throttle = cypress_throttle, | |
269 | .unthrottle = cypress_unthrottle, | |
270 | .read_int_callback = cypress_read_int_callback, | |
271 | .write_int_callback = cypress_write_int_callback, | |
272 | }; | |
1da177e4 LT |
273 | |
274 | /***************************************************************************** | |
275 | * Cypress serial helper functions | |
276 | *****************************************************************************/ | |
277 | ||
278 | ||
093cf723 | 279 | /* This function can either set or retrieve the current serial line settings */ |
1da177e4 LT |
280 | static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_mask, int data_bits, int stop_bits, |
281 | int parity_enable, int parity_type, int reset, int cypress_request_type) | |
282 | { | |
3cb4a4f7 | 283 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 284 | struct cypress_private *priv; |
3cb4a4f7 | 285 | __u8 feature_buffer[8]; |
1da177e4 LT |
286 | unsigned long flags; |
287 | ||
288 | dbg("%s", __FUNCTION__); | |
289 | ||
290 | priv = usb_get_serial_port_data(port); | |
291 | ||
292 | switch(cypress_request_type) { | |
293 | case CYPRESS_SET_CONFIG: | |
294 | ||
295 | /* | |
296 | * The general purpose firmware for the Cypress M8 allows for a maximum speed | |
297 | * of 57600bps (I have no idea whether DeLorme chose to use the general purpose | |
298 | * firmware or not), if you need to modify this speed setting for your own | |
299 | * project please add your own chiptype and modify the code likewise. The | |
3cb4a4f7 LM |
300 | * Cypress HID->COM device will work successfully up to 115200bps (but the |
301 | * actual throughput is around 3kBps). | |
1da177e4 LT |
302 | */ |
303 | if (baud_mask != priv->cbr_mask) { | |
304 | dbg("%s - baud rate is changing", __FUNCTION__); | |
305 | if ( priv->chiptype == CT_EARTHMATE ) { | |
306 | /* 300 and 600 baud rates are supported under the generic firmware, | |
307 | * but are not used with NMEA and SiRF protocols */ | |
308 | ||
309 | if ( (baud_mask == B300) || (baud_mask == B600) ) { | |
3cb4a4f7 | 310 | err("%s - failed setting baud rate, unsupported speed", |
1da177e4 | 311 | __FUNCTION__); |
3cb4a4f7 LM |
312 | new_baudrate = priv->baud_rate; |
313 | } else if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { | |
314 | err("%s - failed setting baud rate, unsupported speed", | |
1da177e4 | 315 | __FUNCTION__); |
3cb4a4f7 | 316 | new_baudrate = priv->baud_rate; |
1da177e4 LT |
317 | } |
318 | } else if (priv->chiptype == CT_CYPHIDCOM) { | |
3cb4a4f7 LM |
319 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { |
320 | err("%s - failed setting baud rate, unsupported speed", | |
1da177e4 | 321 | __FUNCTION__); |
3cb4a4f7 | 322 | new_baudrate = priv->baud_rate; |
1da177e4 | 323 | } |
a5c44e29 LM |
324 | } else if (priv->chiptype == CT_CA42V2) { |
325 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { | |
326 | err("%s - failed setting baud rate, unsupported speed", | |
327 | __FUNCTION__); | |
328 | new_baudrate = priv->baud_rate; | |
329 | } | |
1da177e4 | 330 | } else if (priv->chiptype == CT_GENERIC) { |
3cb4a4f7 LM |
331 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { |
332 | err("%s - failed setting baud rate, unsupported speed", | |
1da177e4 | 333 | __FUNCTION__); |
3cb4a4f7 | 334 | new_baudrate = priv->baud_rate; |
1da177e4 LT |
335 | } |
336 | } else { | |
3cb4a4f7 LM |
337 | info("%s - please define your chiptype", __FUNCTION__); |
338 | new_baudrate = priv->baud_rate; | |
1da177e4 LT |
339 | } |
340 | } else { /* baud rate not changing, keep the old */ | |
3cb4a4f7 | 341 | new_baudrate = priv->baud_rate; |
1da177e4 | 342 | } |
3cb4a4f7 | 343 | dbg("%s - baud rate is being sent as %d", __FUNCTION__, new_baudrate); |
1da177e4 | 344 | |
3cb4a4f7 LM |
345 | memset(feature_buffer, 0, 8); |
346 | /* fill the feature_buffer with new configuration */ | |
347 | *((u_int32_t *)feature_buffer) = new_baudrate; | |
1da177e4 | 348 | |
3cb4a4f7 | 349 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
1da177e4 | 350 | /* 1 bit gap */ |
3cb4a4f7 LM |
351 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ |
352 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
353 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
1da177e4 | 354 | /* 1 bit gap */ |
3cb4a4f7 | 355 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ |
1da177e4 LT |
356 | |
357 | dbg("%s - device is being sent this feature report:", __FUNCTION__); | |
358 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __FUNCTION__, feature_buffer[0], feature_buffer[1], | |
359 | feature_buffer[2], feature_buffer[3], feature_buffer[4]); | |
360 | ||
3cb4a4f7 | 361 | do { |
1da177e4 LT |
362 | retval = usb_control_msg (port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), |
363 | HID_REQ_SET_REPORT, USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
3cb4a4f7 LM |
364 | 0x0300, 0, feature_buffer, 8, 500); |
365 | ||
366 | if (tries++ >= 3) | |
367 | break; | |
1da177e4 | 368 | |
3cb4a4f7 LM |
369 | if (retval == EPIPE) |
370 | usb_clear_halt(port->serial->dev, 0x00); | |
371 | } while (retval != 8 && retval != ENODEV); | |
372 | ||
373 | if (retval != 8) | |
1da177e4 LT |
374 | err("%s - failed sending serial line settings - %d", __FUNCTION__, retval); |
375 | else { | |
376 | spin_lock_irqsave(&priv->lock, flags); | |
3cb4a4f7 | 377 | priv->baud_rate = new_baudrate; |
1da177e4 | 378 | priv->cbr_mask = baud_mask; |
3cb4a4f7 | 379 | priv->current_config = feature_buffer[4]; |
1da177e4 LT |
380 | spin_unlock_irqrestore(&priv->lock, flags); |
381 | } | |
382 | break; | |
383 | case CYPRESS_GET_CONFIG: | |
384 | dbg("%s - retreiving serial line settings", __FUNCTION__); | |
3cb4a4f7 LM |
385 | /* set initial values in feature buffer */ |
386 | memset(feature_buffer, 0, 8); | |
1da177e4 | 387 | |
3cb4a4f7 | 388 | do { |
1da177e4 LT |
389 | retval = usb_control_msg (port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), |
390 | HID_REQ_GET_REPORT, USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
3cb4a4f7 LM |
391 | 0x0300, 0, feature_buffer, 8, 500); |
392 | ||
393 | if (tries++ >= 3) | |
394 | break; | |
395 | ||
396 | if (retval == EPIPE) | |
397 | usb_clear_halt(port->serial->dev, 0x00); | |
398 | } while (retval != 5 && retval != ENODEV); | |
399 | ||
1da177e4 | 400 | if (retval != 5) { |
943ffb58 | 401 | err("%s - failed to retrieve serial line settings - %d", __FUNCTION__, retval); |
1da177e4 LT |
402 | return retval; |
403 | } else { | |
404 | spin_lock_irqsave(&priv->lock, flags); | |
3cb4a4f7 | 405 | |
1da177e4 LT |
406 | /* store the config in one byte, and later use bit masks to check values */ |
407 | priv->current_config = feature_buffer[4]; | |
3cb4a4f7 | 408 | priv->baud_rate = *((u_int32_t *)feature_buffer); |
1da177e4 | 409 | |
3cb4a4f7 | 410 | if ( (priv->cbr_mask = rate_to_mask(priv->baud_rate)) == 0x40) |
1da177e4 | 411 | dbg("%s - failed setting the baud mask (not defined)", __FUNCTION__); |
1da177e4 LT |
412 | spin_unlock_irqrestore(&priv->lock, flags); |
413 | } | |
1da177e4 | 414 | } |
3cb4a4f7 LM |
415 | spin_lock_irqsave(&priv->lock, flags); |
416 | ++priv->cmd_count; | |
417 | spin_unlock_irqrestore(&priv->lock, flags); | |
418 | ||
1da177e4 LT |
419 | return retval; |
420 | } /* cypress_serial_control */ | |
421 | ||
422 | ||
3cb4a4f7 | 423 | /* given a baud mask, it will return integer baud on success */ |
1da177e4 LT |
424 | static int mask_to_rate (unsigned mask) |
425 | { | |
426 | int rate; | |
427 | ||
428 | switch (mask) { | |
429 | case B0: rate = 0; break; | |
430 | case B300: rate = 300; break; | |
431 | case B600: rate = 600; break; | |
432 | case B1200: rate = 1200; break; | |
433 | case B2400: rate = 2400; break; | |
434 | case B4800: rate = 4800; break; | |
435 | case B9600: rate = 9600; break; | |
436 | case B19200: rate = 19200; break; | |
437 | case B38400: rate = 38400; break; | |
438 | case B57600: rate = 57600; break; | |
439 | case B115200: rate = 115200; break; | |
440 | default: rate = -1; | |
441 | } | |
442 | ||
443 | return rate; | |
444 | } | |
445 | ||
446 | ||
447 | static unsigned rate_to_mask (int rate) | |
448 | { | |
449 | unsigned mask; | |
450 | ||
451 | switch (rate) { | |
452 | case 0: mask = B0; break; | |
453 | case 300: mask = B300; break; | |
454 | case 600: mask = B600; break; | |
455 | case 1200: mask = B1200; break; | |
456 | case 2400: mask = B2400; break; | |
457 | case 4800: mask = B4800; break; | |
458 | case 9600: mask = B9600; break; | |
459 | case 19200: mask = B19200; break; | |
460 | case 38400: mask = B38400; break; | |
461 | case 57600: mask = B57600; break; | |
462 | case 115200: mask = B115200; break; | |
463 | default: mask = 0x40; | |
464 | } | |
465 | ||
466 | return mask; | |
467 | } | |
468 | /***************************************************************************** | |
469 | * Cypress serial driver functions | |
470 | *****************************************************************************/ | |
471 | ||
472 | ||
473 | static int generic_startup (struct usb_serial *serial) | |
474 | { | |
475 | struct cypress_private *priv; | |
476 | ||
477 | dbg("%s - port %d", __FUNCTION__, serial->port[0]->number); | |
478 | ||
80b6ca48 | 479 | priv = kzalloc(sizeof (struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
480 | if (!priv) |
481 | return -ENOMEM; | |
482 | ||
1da177e4 LT |
483 | spin_lock_init(&priv->lock); |
484 | priv->buf = cypress_buf_alloc(CYPRESS_BUF_SIZE); | |
485 | if (priv->buf == NULL) { | |
486 | kfree(priv); | |
487 | return -ENOMEM; | |
488 | } | |
489 | init_waitqueue_head(&priv->delta_msr_wait); | |
490 | ||
491 | usb_reset_configuration (serial->dev); | |
492 | ||
3cb4a4f7 | 493 | interval = 1; |
1da177e4 LT |
494 | priv->cmd_ctrl = 0; |
495 | priv->line_control = 0; | |
496 | priv->termios_initialized = 0; | |
1da177e4 | 497 | priv->rx_flags = 0; |
3cb4a4f7 | 498 | priv->cbr_mask = B300; |
1da177e4 LT |
499 | usb_set_serial_port_data(serial->port[0], priv); |
500 | ||
b9db07fb LM |
501 | return 0; |
502 | } | |
1da177e4 LT |
503 | |
504 | ||
505 | static int cypress_earthmate_startup (struct usb_serial *serial) | |
506 | { | |
507 | struct cypress_private *priv; | |
508 | ||
509 | dbg("%s", __FUNCTION__); | |
510 | ||
511 | if (generic_startup(serial)) { | |
b9db07fb LM |
512 | dbg("%s - Failed setting up port %d", __FUNCTION__, |
513 | serial->port[0]->number); | |
1da177e4 LT |
514 | return 1; |
515 | } | |
516 | ||
517 | priv = usb_get_serial_port_data(serial->port[0]); | |
518 | priv->chiptype = CT_EARTHMATE; | |
b9db07fb LM |
519 | |
520 | return 0; | |
1da177e4 LT |
521 | } /* cypress_earthmate_startup */ |
522 | ||
523 | ||
524 | static int cypress_hidcom_startup (struct usb_serial *serial) | |
525 | { | |
526 | struct cypress_private *priv; | |
527 | ||
528 | dbg("%s", __FUNCTION__); | |
529 | ||
530 | if (generic_startup(serial)) { | |
b9db07fb LM |
531 | dbg("%s - Failed setting up port %d", __FUNCTION__, |
532 | serial->port[0]->number); | |
1da177e4 LT |
533 | return 1; |
534 | } | |
535 | ||
536 | priv = usb_get_serial_port_data(serial->port[0]); | |
537 | priv->chiptype = CT_CYPHIDCOM; | |
538 | ||
b9db07fb | 539 | return 0; |
1da177e4 LT |
540 | } /* cypress_hidcom_startup */ |
541 | ||
542 | ||
a5c44e29 LM |
543 | static int cypress_ca42v2_startup (struct usb_serial *serial) |
544 | { | |
545 | struct cypress_private *priv; | |
546 | ||
547 | dbg("%s", __FUNCTION__); | |
548 | ||
549 | if (generic_startup(serial)) { | |
550 | dbg("%s - Failed setting up port %d", __FUNCTION__, | |
551 | serial->port[0]->number); | |
552 | return 1; | |
553 | } | |
554 | ||
555 | priv = usb_get_serial_port_data(serial->port[0]); | |
556 | priv->chiptype = CT_CA42V2; | |
557 | ||
558 | return 0; | |
559 | } /* cypress_ca42v2_startup */ | |
560 | ||
561 | ||
1da177e4 LT |
562 | static void cypress_shutdown (struct usb_serial *serial) |
563 | { | |
564 | struct cypress_private *priv; | |
565 | ||
566 | dbg ("%s - port %d", __FUNCTION__, serial->port[0]->number); | |
567 | ||
568 | /* all open ports are closed at this point */ | |
569 | ||
570 | priv = usb_get_serial_port_data(serial->port[0]); | |
571 | ||
572 | if (priv) { | |
573 | cypress_buf_free(priv->buf); | |
574 | kfree(priv); | |
575 | usb_set_serial_port_data(serial->port[0], NULL); | |
576 | } | |
577 | } | |
578 | ||
579 | ||
580 | static int cypress_open (struct usb_serial_port *port, struct file *filp) | |
581 | { | |
582 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
583 | struct usb_serial *serial = port->serial; | |
584 | unsigned long flags; | |
585 | int result = 0; | |
586 | ||
587 | dbg("%s - port %d", __FUNCTION__, port->number); | |
588 | ||
589 | /* clear halts before open */ | |
1da177e4 LT |
590 | usb_clear_halt(serial->dev, 0x81); |
591 | usb_clear_halt(serial->dev, 0x02); | |
592 | ||
593 | spin_lock_irqsave(&priv->lock, flags); | |
594 | /* reset read/write statistics */ | |
595 | priv->bytes_in = 0; | |
596 | priv->bytes_out = 0; | |
597 | priv->cmd_count = 0; | |
598 | priv->rx_flags = 0; | |
599 | spin_unlock_irqrestore(&priv->lock, flags); | |
600 | ||
601 | /* setting to zero could cause data loss */ | |
602 | port->tty->low_latency = 1; | |
603 | ||
604 | /* raise both lines and set termios */ | |
605 | spin_lock_irqsave(&priv->lock, flags); | |
606 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
1da177e4 LT |
607 | priv->cmd_ctrl = 1; |
608 | spin_unlock_irqrestore(&priv->lock, flags); | |
609 | result = cypress_write(port, NULL, 0); | |
610 | ||
611 | if (result) { | |
612 | dev_err(&port->dev, "%s - failed setting the control lines - error %d\n", __FUNCTION__, result); | |
613 | return result; | |
614 | } else | |
615 | dbg("%s - success setting the control lines", __FUNCTION__); | |
616 | ||
617 | cypress_set_termios(port, &priv->tmp_termios); | |
618 | ||
619 | /* setup the port and start reading from the device */ | |
620 | if(!port->interrupt_in_urb){ | |
621 | err("%s - interrupt_in_urb is empty!", __FUNCTION__); | |
622 | return(-1); | |
623 | } | |
624 | ||
625 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
626 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
627 | port->interrupt_in_urb->transfer_buffer, port->interrupt_in_urb->transfer_buffer_length, | |
3cb4a4f7 | 628 | cypress_read_int_callback, port, interval); |
1da177e4 LT |
629 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
630 | ||
631 | if (result){ | |
632 | dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); | |
633 | } | |
634 | ||
635 | return result; | |
636 | } /* cypress_open */ | |
637 | ||
638 | ||
639 | static void cypress_close(struct usb_serial_port *port, struct file * filp) | |
640 | { | |
641 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
642 | unsigned int c_cflag; | |
643 | unsigned long flags; | |
644 | int bps; | |
645 | long timeout; | |
646 | wait_queue_t wait; | |
647 | ||
648 | dbg("%s - port %d", __FUNCTION__, port->number); | |
649 | ||
650 | /* wait for data to drain from buffer */ | |
651 | spin_lock_irqsave(&priv->lock, flags); | |
652 | timeout = CYPRESS_CLOSING_WAIT; | |
653 | init_waitqueue_entry(&wait, current); | |
654 | add_wait_queue(&port->tty->write_wait, &wait); | |
655 | for (;;) { | |
656 | set_current_state(TASK_INTERRUPTIBLE); | |
657 | if (cypress_buf_data_avail(priv->buf) == 0 | |
658 | || timeout == 0 || signal_pending(current) | |
659 | || !usb_get_intfdata(port->serial->interface)) | |
660 | break; | |
661 | spin_unlock_irqrestore(&priv->lock, flags); | |
662 | timeout = schedule_timeout(timeout); | |
663 | spin_lock_irqsave(&priv->lock, flags); | |
664 | } | |
665 | set_current_state(TASK_RUNNING); | |
666 | remove_wait_queue(&port->tty->write_wait, &wait); | |
667 | /* clear out any remaining data in the buffer */ | |
668 | cypress_buf_clear(priv->buf); | |
669 | spin_unlock_irqrestore(&priv->lock, flags); | |
670 | ||
671 | /* wait for characters to drain from device */ | |
672 | bps = tty_get_baud_rate(port->tty); | |
673 | if (bps > 1200) | |
674 | timeout = max((HZ*2560)/bps,HZ/10); | |
675 | else | |
676 | timeout = 2*HZ; | |
22c43863 | 677 | schedule_timeout_interruptible(timeout); |
1da177e4 LT |
678 | |
679 | dbg("%s - stopping urbs", __FUNCTION__); | |
680 | usb_kill_urb (port->interrupt_in_urb); | |
681 | usb_kill_urb (port->interrupt_out_urb); | |
682 | ||
683 | if (port->tty) { | |
684 | c_cflag = port->tty->termios->c_cflag; | |
685 | if (c_cflag & HUPCL) { | |
686 | /* drop dtr and rts */ | |
687 | priv = usb_get_serial_port_data(port); | |
688 | spin_lock_irqsave(&priv->lock, flags); | |
689 | priv->line_control = 0; | |
690 | priv->cmd_ctrl = 1; | |
691 | spin_unlock_irqrestore(&priv->lock, flags); | |
692 | cypress_write(port, NULL, 0); | |
693 | } | |
694 | } | |
695 | ||
696 | if (stats) | |
697 | dev_info (&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", | |
698 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
699 | } /* cypress_close */ | |
700 | ||
701 | ||
702 | static int cypress_write(struct usb_serial_port *port, const unsigned char *buf, int count) | |
703 | { | |
704 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
705 | unsigned long flags; | |
706 | ||
707 | dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); | |
708 | ||
709 | /* line control commands, which need to be executed immediately, | |
710 | are not put into the buffer for obvious reasons. | |
711 | */ | |
712 | if (priv->cmd_ctrl) { | |
713 | count = 0; | |
714 | goto finish; | |
715 | } | |
716 | ||
717 | if (!count) | |
718 | return count; | |
719 | ||
720 | spin_lock_irqsave(&priv->lock, flags); | |
721 | count = cypress_buf_put(priv->buf, buf, count); | |
722 | spin_unlock_irqrestore(&priv->lock, flags); | |
723 | ||
724 | finish: | |
725 | cypress_send(port); | |
726 | ||
727 | return count; | |
728 | } /* cypress_write */ | |
729 | ||
730 | ||
731 | static void cypress_send(struct usb_serial_port *port) | |
732 | { | |
733 | int count = 0, result, offset, actual_size; | |
734 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
735 | unsigned long flags; | |
736 | ||
737 | dbg("%s - port %d", __FUNCTION__, port->number); | |
738 | dbg("%s - interrupt out size is %d", __FUNCTION__, port->interrupt_out_size); | |
739 | ||
740 | spin_lock_irqsave(&priv->lock, flags); | |
741 | if (priv->write_urb_in_use) { | |
742 | dbg("%s - can't write, urb in use", __FUNCTION__); | |
743 | spin_unlock_irqrestore(&priv->lock, flags); | |
744 | return; | |
745 | } | |
746 | spin_unlock_irqrestore(&priv->lock, flags); | |
747 | ||
748 | /* clear buffer */ | |
749 | memset(port->interrupt_out_urb->transfer_buffer, 0, port->interrupt_out_size); | |
750 | ||
751 | spin_lock_irqsave(&priv->lock, flags); | |
752 | switch (port->interrupt_out_size) { | |
753 | case 32: | |
3cb4a4f7 | 754 | /* this is for the CY7C64013... */ |
1da177e4 LT |
755 | offset = 2; |
756 | port->interrupt_out_buffer[0] = priv->line_control; | |
757 | break; | |
758 | case 8: | |
3cb4a4f7 | 759 | /* this is for the CY7C63743... */ |
1da177e4 LT |
760 | offset = 1; |
761 | port->interrupt_out_buffer[0] = priv->line_control; | |
762 | break; | |
763 | default: | |
764 | dbg("%s - wrong packet size", __FUNCTION__); | |
765 | spin_unlock_irqrestore(&priv->lock, flags); | |
766 | return; | |
767 | } | |
768 | ||
769 | if (priv->line_control & CONTROL_RESET) | |
770 | priv->line_control &= ~CONTROL_RESET; | |
771 | ||
772 | if (priv->cmd_ctrl) { | |
773 | priv->cmd_count++; | |
774 | dbg("%s - line control command being issued", __FUNCTION__); | |
775 | spin_unlock_irqrestore(&priv->lock, flags); | |
776 | goto send; | |
777 | } else | |
778 | spin_unlock_irqrestore(&priv->lock, flags); | |
779 | ||
780 | count = cypress_buf_get(priv->buf, &port->interrupt_out_buffer[offset], | |
781 | port->interrupt_out_size-offset); | |
782 | ||
783 | if (count == 0) { | |
784 | return; | |
785 | } | |
786 | ||
787 | switch (port->interrupt_out_size) { | |
788 | case 32: | |
789 | port->interrupt_out_buffer[1] = count; | |
790 | break; | |
791 | case 8: | |
792 | port->interrupt_out_buffer[0] |= count; | |
793 | } | |
794 | ||
795 | dbg("%s - count is %d", __FUNCTION__, count); | |
796 | ||
797 | send: | |
798 | spin_lock_irqsave(&priv->lock, flags); | |
799 | priv->write_urb_in_use = 1; | |
800 | spin_unlock_irqrestore(&priv->lock, flags); | |
801 | ||
802 | if (priv->cmd_ctrl) | |
803 | actual_size = 1; | |
804 | else | |
805 | actual_size = count + (port->interrupt_out_size == 32 ? 2 : 1); | |
806 | ||
807 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, port->interrupt_out_size, | |
808 | port->interrupt_out_urb->transfer_buffer); | |
809 | ||
810 | port->interrupt_out_urb->transfer_buffer_length = actual_size; | |
811 | port->interrupt_out_urb->dev = port->serial->dev; | |
3cb4a4f7 | 812 | port->interrupt_out_urb->interval = interval; |
1da177e4 LT |
813 | result = usb_submit_urb (port->interrupt_out_urb, GFP_ATOMIC); |
814 | if (result) { | |
815 | dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, | |
816 | result); | |
817 | priv->write_urb_in_use = 0; | |
818 | } | |
819 | ||
820 | spin_lock_irqsave(&priv->lock, flags); | |
821 | if (priv->cmd_ctrl) { | |
822 | priv->cmd_ctrl = 0; | |
823 | } | |
824 | priv->bytes_out += count; /* do not count the line control and size bytes */ | |
825 | spin_unlock_irqrestore(&priv->lock, flags); | |
826 | ||
cf2c7481 | 827 | usb_serial_port_softint(port); |
1da177e4 LT |
828 | } /* cypress_send */ |
829 | ||
830 | ||
831 | /* returns how much space is available in the soft buffer */ | |
832 | static int cypress_write_room(struct usb_serial_port *port) | |
833 | { | |
834 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
835 | int room = 0; | |
836 | unsigned long flags; | |
837 | ||
838 | dbg("%s - port %d", __FUNCTION__, port->number); | |
839 | ||
840 | spin_lock_irqsave(&priv->lock, flags); | |
841 | room = cypress_buf_space_avail(priv->buf); | |
842 | spin_unlock_irqrestore(&priv->lock, flags); | |
843 | ||
844 | dbg("%s - returns %d", __FUNCTION__, room); | |
845 | return room; | |
846 | } | |
847 | ||
848 | ||
849 | static int cypress_tiocmget (struct usb_serial_port *port, struct file *file) | |
850 | { | |
851 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
852 | __u8 status, control; | |
853 | unsigned int result = 0; | |
854 | unsigned long flags; | |
855 | ||
856 | dbg("%s - port %d", __FUNCTION__, port->number); | |
857 | ||
858 | spin_lock_irqsave(&priv->lock, flags); | |
859 | control = priv->line_control; | |
860 | status = priv->current_status; | |
861 | spin_unlock_irqrestore(&priv->lock, flags); | |
862 | ||
863 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
864 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
865 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
866 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
867 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
868 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
869 | ||
870 | dbg("%s - result = %x", __FUNCTION__, result); | |
871 | ||
872 | return result; | |
873 | } | |
874 | ||
875 | ||
876 | static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, | |
877 | unsigned int set, unsigned int clear) | |
878 | { | |
879 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
880 | unsigned long flags; | |
881 | ||
882 | dbg("%s - port %d", __FUNCTION__, port->number); | |
883 | ||
884 | spin_lock_irqsave(&priv->lock, flags); | |
885 | if (set & TIOCM_RTS) | |
886 | priv->line_control |= CONTROL_RTS; | |
887 | if (set & TIOCM_DTR) | |
888 | priv->line_control |= CONTROL_DTR; | |
889 | if (clear & TIOCM_RTS) | |
890 | priv->line_control &= ~CONTROL_RTS; | |
891 | if (clear & TIOCM_DTR) | |
892 | priv->line_control &= ~CONTROL_DTR; | |
893 | spin_unlock_irqrestore(&priv->lock, flags); | |
894 | ||
895 | priv->cmd_ctrl = 1; | |
896 | return cypress_write(port, NULL, 0); | |
897 | } | |
898 | ||
899 | ||
900 | static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) | |
901 | { | |
902 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
903 | ||
904 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); | |
905 | ||
906 | switch (cmd) { | |
907 | case TIOCGSERIAL: | |
908 | if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { | |
909 | return -EFAULT; | |
910 | } | |
911 | return (0); | |
912 | break; | |
913 | case TIOCSSERIAL: | |
914 | if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { | |
915 | return -EFAULT; | |
916 | } | |
917 | /* here we need to call cypress_set_termios to invoke the new settings */ | |
918 | cypress_set_termios(port, &priv->tmp_termios); | |
919 | return (0); | |
920 | break; | |
921 | /* these are called when setting baud rate from gpsd */ | |
922 | case TCGETS: | |
923 | if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { | |
924 | return -EFAULT; | |
925 | } | |
926 | return (0); | |
927 | break; | |
928 | case TCSETS: | |
929 | if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { | |
930 | return -EFAULT; | |
931 | } | |
932 | /* here we need to call cypress_set_termios to invoke the new settings */ | |
933 | cypress_set_termios(port, &priv->tmp_termios); | |
934 | return (0); | |
935 | break; | |
936 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ | |
937 | case TIOCMIWAIT: | |
938 | while (priv != NULL) { | |
939 | interruptible_sleep_on(&priv->delta_msr_wait); | |
940 | /* see if a signal did it */ | |
941 | if (signal_pending(current)) | |
942 | return -ERESTARTSYS; | |
943 | else { | |
944 | char diff = priv->diff_status; | |
945 | ||
946 | if (diff == 0) { | |
947 | return -EIO; /* no change => error */ | |
948 | } | |
949 | ||
950 | /* consume all events */ | |
951 | priv->diff_status = 0; | |
952 | ||
953 | /* return 0 if caller wanted to know about these bits */ | |
954 | if ( ((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
955 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
956 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
957 | ((arg & TIOCM_CTS) && (diff & UART_CTS)) ) { | |
958 | return 0; | |
959 | } | |
960 | /* otherwise caller can't care less about what happened, | |
961 | * and so we continue to wait for more events. | |
962 | */ | |
963 | } | |
964 | } | |
965 | return 0; | |
966 | break; | |
967 | default: | |
968 | break; | |
969 | } | |
970 | ||
971 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __FUNCTION__, cmd); | |
972 | ||
973 | return -ENOIOCTLCMD; | |
974 | } /* cypress_ioctl */ | |
975 | ||
976 | ||
b9db07fb LM |
977 | static void cypress_set_termios (struct usb_serial_port *port, |
978 | struct termios *old_termios) | |
1da177e4 LT |
979 | { |
980 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
981 | struct tty_struct *tty; | |
982 | int data_bits, stop_bits, parity_type, parity_enable; | |
983 | unsigned cflag, iflag, baud_mask; | |
984 | unsigned long flags; | |
985 | __u8 oldlines; | |
3cb4a4f7 | 986 | int linechange = 0; |
b9db07fb | 987 | |
1da177e4 LT |
988 | dbg("%s - port %d", __FUNCTION__, port->number); |
989 | ||
990 | tty = port->tty; | |
991 | if ((!tty) || (!tty->termios)) { | |
992 | dbg("%s - no tty structures", __FUNCTION__); | |
993 | return; | |
994 | } | |
995 | ||
996 | spin_lock_irqsave(&priv->lock, flags); | |
997 | if (!priv->termios_initialized) { | |
998 | if (priv->chiptype == CT_EARTHMATE) { | |
999 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
1000 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
1001 | CLOCAL; | |
1da177e4 LT |
1002 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
1003 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
1004 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
1005 | CLOCAL; | |
a5c44e29 LM |
1006 | } else if (priv->chiptype == CT_CA42V2) { |
1007 | *(tty->termios) = tty_std_termios; | |
1008 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1009 | CLOCAL; | |
1da177e4 LT |
1010 | } |
1011 | priv->termios_initialized = 1; | |
1012 | } | |
1013 | spin_unlock_irqrestore(&priv->lock, flags); | |
1014 | ||
1015 | cflag = tty->termios->c_cflag; | |
1016 | iflag = tty->termios->c_iflag; | |
1017 | ||
1018 | /* check if there are new settings */ | |
1019 | if (old_termios) { | |
1020 | if ((cflag != old_termios->c_cflag) || | |
b9db07fb LM |
1021 | (RELEVANT_IFLAG(iflag) != |
1022 | RELEVANT_IFLAG(old_termios->c_iflag))) { | |
1023 | dbg("%s - attempting to set new termios settings", | |
1024 | __FUNCTION__); | |
1025 | /* should make a copy of this in case something goes | |
1026 | * wrong in the function, we can restore it */ | |
1da177e4 LT |
1027 | spin_lock_irqsave(&priv->lock, flags); |
1028 | priv->tmp_termios = *(tty->termios); | |
b9db07fb | 1029 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1030 | } else { |
1031 | dbg("%s - nothing to do, exiting", __FUNCTION__); | |
1032 | return; | |
1033 | } | |
1034 | } else | |
1035 | return; | |
1036 | ||
1037 | /* set number of data bits, parity, stop bits */ | |
1038 | /* when parity is disabled the parity type bit is ignored */ | |
1039 | ||
b9db07fb LM |
1040 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
1041 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
1042 | ||
1da177e4 LT |
1043 | if (cflag & PARENB) { |
1044 | parity_enable = 1; | |
b9db07fb LM |
1045 | /* 1 means odd parity, 0 means even parity */ |
1046 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
1047 | } else |
1048 | parity_enable = parity_type = 0; | |
1049 | ||
1050 | if (cflag & CSIZE) { | |
1051 | switch (cflag & CSIZE) { | |
b9db07fb LM |
1052 | case CS5: |
1053 | data_bits = 0; | |
1054 | break; | |
1055 | case CS6: | |
1056 | data_bits = 1; | |
1057 | break; | |
1058 | case CS7: | |
1059 | data_bits = 2; | |
1060 | break; | |
1061 | case CS8: | |
1062 | data_bits = 3; | |
1063 | break; | |
1064 | default: | |
1065 | err("%s - CSIZE was set, but not CS5-CS8", | |
1066 | __FUNCTION__); | |
1067 | data_bits = 3; | |
1da177e4 LT |
1068 | } |
1069 | } else | |
1070 | data_bits = 3; | |
1071 | ||
1072 | spin_lock_irqsave(&priv->lock, flags); | |
1073 | oldlines = priv->line_control; | |
1074 | if ((cflag & CBAUD) == B0) { | |
1075 | /* drop dtr and rts */ | |
1076 | dbg("%s - dropping the lines, baud rate 0bps", __FUNCTION__); | |
1077 | baud_mask = B0; | |
1078 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
1079 | } else { | |
1080 | baud_mask = (cflag & CBAUD); | |
1081 | switch(baud_mask) { | |
b9db07fb LM |
1082 | case B300: |
1083 | dbg("%s - setting baud 300bps", __FUNCTION__); | |
1084 | break; | |
1085 | case B600: | |
1086 | dbg("%s - setting baud 600bps", __FUNCTION__); | |
1087 | break; | |
1088 | case B1200: | |
1089 | dbg("%s - setting baud 1200bps", __FUNCTION__); | |
1090 | break; | |
1091 | case B2400: | |
1092 | dbg("%s - setting baud 2400bps", __FUNCTION__); | |
1093 | break; | |
1094 | case B4800: | |
1095 | dbg("%s - setting baud 4800bps", __FUNCTION__); | |
1096 | break; | |
1097 | case B9600: | |
1098 | dbg("%s - setting baud 9600bps", __FUNCTION__); | |
1099 | break; | |
1100 | case B19200: | |
1101 | dbg("%s - setting baud 19200bps", __FUNCTION__); | |
1102 | break; | |
1103 | case B38400: | |
1104 | dbg("%s - setting baud 38400bps", __FUNCTION__); | |
1105 | break; | |
1106 | case B57600: | |
1107 | dbg("%s - setting baud 57600bps", __FUNCTION__); | |
1108 | break; | |
1109 | case B115200: | |
1110 | dbg("%s - setting baud 115200bps", __FUNCTION__); | |
1111 | break; | |
1112 | default: | |
1113 | dbg("%s - unknown masked baud rate", __FUNCTION__); | |
1da177e4 | 1114 | } |
3cb4a4f7 | 1115 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 LT |
1116 | } |
1117 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 | 1118 | |
b9db07fb LM |
1119 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, " |
1120 | "%d data_bits (+5)", __FUNCTION__, stop_bits, | |
1121 | parity_enable, parity_type, data_bits); | |
1122 | ||
1123 | cypress_serial_control(port, baud_mask, data_bits, stop_bits, | |
1124 | parity_enable, parity_type, 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1125 | |
b9db07fb LM |
1126 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1127 | * filled into the private structure this should confirm that all is | |
1128 | * working if it returns what we just set */ | |
1da177e4 LT |
1129 | cypress_serial_control(port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1130 | ||
b9db07fb LM |
1131 | /* Here we can define custom tty settings for devices; the main tty |
1132 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1133 | |
b9db07fb | 1134 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 1135 | if ( (priv->chiptype == CT_EARTHMATE) && (priv->baud_rate == 4800) ) { |
b9db07fb LM |
1136 | dbg("Using custom termios settings for a baud rate of " |
1137 | "4800bps."); | |
1da177e4 LT |
1138 | /* define custom termios settings for NMEA protocol */ |
1139 | ||
1da177e4 | 1140 | tty->termios->c_iflag /* input modes - */ |
b9db07fb LM |
1141 | &= ~(IGNBRK /* disable ignore break */ |
1142 | | BRKINT /* disable break causes interrupt */ | |
1143 | | PARMRK /* disable mark parity errors */ | |
1144 | | ISTRIP /* disable clear high bit of input char */ | |
1145 | | INLCR /* disable translate NL to CR */ | |
1146 | | IGNCR /* disable ignore CR */ | |
1147 | | ICRNL /* disable translate CR to NL */ | |
1148 | | IXON); /* disable enable XON/XOFF flow control */ | |
1149 | ||
1da177e4 | 1150 | tty->termios->c_oflag /* output modes */ |
b9db07fb | 1151 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1152 | |
b9db07fb LM |
1153 | tty->termios->c_lflag /* line discipline modes */ |
1154 | &= ~(ECHO /* disable echo input characters */ | |
1155 | | ECHONL /* disable echo new line */ | |
1156 | | ICANON /* disable erase, kill, werase, and rprnt | |
1157 | special characters */ | |
1158 | | ISIG /* disable interrupt, quit, and suspend | |
1159 | special characters */ | |
1160 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1161 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1162 | |
1da177e4 LT |
1163 | linechange = (priv->line_control != oldlines); |
1164 | spin_unlock_irqrestore(&priv->lock, flags); | |
1165 | ||
1166 | /* if necessary, set lines */ | |
3cb4a4f7 | 1167 | if (linechange) { |
1da177e4 LT |
1168 | priv->cmd_ctrl = 1; |
1169 | cypress_write(port, NULL, 0); | |
1170 | } | |
1da177e4 LT |
1171 | } /* cypress_set_termios */ |
1172 | ||
b9db07fb | 1173 | |
1da177e4 LT |
1174 | /* returns amount of data still left in soft buffer */ |
1175 | static int cypress_chars_in_buffer(struct usb_serial_port *port) | |
1176 | { | |
1177 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1178 | int chars = 0; | |
1179 | unsigned long flags; | |
1180 | ||
1181 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1182 | ||
1183 | spin_lock_irqsave(&priv->lock, flags); | |
1184 | chars = cypress_buf_data_avail(priv->buf); | |
1185 | spin_unlock_irqrestore(&priv->lock, flags); | |
1186 | ||
1187 | dbg("%s - returns %d", __FUNCTION__, chars); | |
1188 | return chars; | |
1189 | } | |
1190 | ||
1191 | ||
1192 | static void cypress_throttle (struct usb_serial_port *port) | |
1193 | { | |
1194 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1195 | unsigned long flags; | |
1196 | ||
1197 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1198 | ||
1199 | spin_lock_irqsave(&priv->lock, flags); | |
1200 | priv->rx_flags = THROTTLED; | |
b9db07fb | 1201 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | ||
1205 | static void cypress_unthrottle (struct usb_serial_port *port) | |
1206 | { | |
1207 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1208 | int actually_throttled, result; | |
1209 | unsigned long flags; | |
1210 | ||
1211 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1212 | ||
1213 | spin_lock_irqsave(&priv->lock, flags); | |
1214 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; | |
1215 | priv->rx_flags = 0; | |
1216 | spin_unlock_irqrestore(&priv->lock, flags); | |
1217 | ||
1218 | if (actually_throttled) { | |
1219 | port->interrupt_in_urb->dev = port->serial->dev; | |
1220 | ||
1221 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); | |
1222 | if (result) | |
b9db07fb LM |
1223 | dev_err(&port->dev, "%s - failed submitting read urb, " |
1224 | "error %d\n", __FUNCTION__, result); | |
1da177e4 LT |
1225 | } |
1226 | } | |
1227 | ||
1228 | ||
1229 | static void cypress_read_int_callback(struct urb *urb, struct pt_regs *regs) | |
1230 | { | |
1231 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
1232 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1233 | struct tty_struct *tty; | |
1234 | unsigned char *data = urb->transfer_buffer; | |
1235 | unsigned long flags; | |
b9db07fb | 1236 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1237 | int havedata = 0; |
1238 | int bytes = 0; | |
1239 | int result; | |
1240 | int i = 0; | |
1241 | ||
1242 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1243 | ||
1244 | if (urb->status) { | |
b9db07fb LM |
1245 | dbg("%s - nonzero read status received: %d", __FUNCTION__, |
1246 | urb->status); | |
1da177e4 LT |
1247 | return; |
1248 | } | |
1249 | ||
1250 | spin_lock_irqsave(&priv->lock, flags); | |
1251 | if (priv->rx_flags & THROTTLED) { | |
1252 | dbg("%s - now throttling", __FUNCTION__); | |
1253 | priv->rx_flags |= ACTUALLY_THROTTLED; | |
1254 | spin_unlock_irqrestore(&priv->lock, flags); | |
1255 | return; | |
1256 | } | |
1257 | spin_unlock_irqrestore(&priv->lock, flags); | |
1258 | ||
1259 | tty = port->tty; | |
1260 | if (!tty) { | |
1261 | dbg("%s - bad tty pointer - exiting", __FUNCTION__); | |
1262 | return; | |
1263 | } | |
1264 | ||
1265 | spin_lock_irqsave(&priv->lock, flags); | |
1266 | switch(urb->actual_length) { | |
1267 | case 32: | |
3cb4a4f7 | 1268 | /* This is for the CY7C64013... */ |
1da177e4 | 1269 | priv->current_status = data[0] & 0xF8; |
b9db07fb LM |
1270 | bytes = data[1] + 2; |
1271 | i = 2; | |
1da177e4 LT |
1272 | if (bytes > 2) |
1273 | havedata = 1; | |
1274 | break; | |
1275 | case 8: | |
3cb4a4f7 | 1276 | /* This is for the CY7C63743... */ |
1da177e4 | 1277 | priv->current_status = data[0] & 0xF8; |
b9db07fb LM |
1278 | bytes = (data[0] & 0x07) + 1; |
1279 | i = 1; | |
1da177e4 LT |
1280 | if (bytes > 1) |
1281 | havedata = 1; | |
1282 | break; | |
1283 | default: | |
b9db07fb LM |
1284 | dbg("%s - wrong packet size - received %d bytes", |
1285 | __FUNCTION__, urb->actual_length); | |
1da177e4 LT |
1286 | spin_unlock_irqrestore(&priv->lock, flags); |
1287 | goto continue_read; | |
1288 | } | |
1289 | spin_unlock_irqrestore(&priv->lock, flags); | |
1290 | ||
b9db07fb LM |
1291 | usb_serial_debug_data (debug, &port->dev, __FUNCTION__, |
1292 | urb->actual_length, data); | |
1da177e4 LT |
1293 | |
1294 | spin_lock_irqsave(&priv->lock, flags); | |
1295 | /* check to see if status has changed */ | |
1296 | if (priv != NULL) { | |
1297 | if (priv->current_status != priv->prev_status) { | |
b9db07fb LM |
1298 | priv->diff_status |= priv->current_status ^ |
1299 | priv->prev_status; | |
1da177e4 LT |
1300 | wake_up_interruptible(&priv->delta_msr_wait); |
1301 | priv->prev_status = priv->current_status; | |
1302 | } | |
1303 | } | |
b9db07fb | 1304 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1305 | |
b9db07fb LM |
1306 | /* hangup, as defined in acm.c... this might be a bad place for it |
1307 | * though */ | |
1308 | if (tty && !(tty->termios->c_cflag & CLOCAL) && | |
1309 | !(priv->current_status & UART_CD)) { | |
1da177e4 LT |
1310 | dbg("%s - calling hangup", __FUNCTION__); |
1311 | tty_hangup(tty); | |
1312 | goto continue_read; | |
1313 | } | |
1314 | ||
b9db07fb LM |
1315 | /* There is one error bit... I'm assuming it is a parity error |
1316 | * indicator as the generic firmware will set this bit to 1 if a | |
1317 | * parity error occurs. | |
1318 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1319 | spin_lock_irqsave(&priv->lock, flags); |
1320 | if (priv->current_status & CYP_ERROR) { | |
1321 | spin_unlock_irqrestore(&priv->lock, flags); | |
1322 | tty_flag = TTY_PARITY; | |
1323 | dbg("%s - Parity Error detected", __FUNCTION__); | |
1324 | } else | |
1325 | spin_unlock_irqrestore(&priv->lock, flags); | |
1326 | ||
1327 | /* process read if there is data other than line status */ | |
1328 | if (tty && (bytes > i)) { | |
33f0f88f | 1329 | bytes = tty_buffer_request_room(tty, bytes); |
1da177e4 | 1330 | for (; i < bytes ; ++i) { |
b9db07fb LM |
1331 | dbg("pushing byte number %d - %d - %c", i, data[i], |
1332 | data[i]); | |
1da177e4 LT |
1333 | tty_insert_flip_char(tty, data[i], tty_flag); |
1334 | } | |
1335 | tty_flip_buffer_push(port->tty); | |
1336 | } | |
1337 | ||
1338 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1339 | /* control and status byte(s) are also counted */ |
1340 | priv->bytes_in += bytes; | |
1da177e4 LT |
1341 | spin_unlock_irqrestore(&priv->lock, flags); |
1342 | ||
1343 | continue_read: | |
b9db07fb LM |
1344 | |
1345 | /* Continue trying to always read... unless the port has closed. */ | |
1da177e4 LT |
1346 | |
1347 | if (port->open_count > 0) { | |
b9db07fb LM |
1348 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1349 | usb_rcvintpipe(port->serial->dev, | |
1350 | port->interrupt_in_endpointAddress), | |
1351 | port->interrupt_in_urb->transfer_buffer, | |
1352 | port->interrupt_in_urb->transfer_buffer_length, | |
1353 | cypress_read_int_callback, port, interval); | |
1354 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); | |
1355 | if (result) | |
1356 | dev_err(&urb->dev->dev, "%s - failed resubmitting " | |
1357 | "read urb, error %d\n", __FUNCTION__, | |
1358 | result); | |
1da177e4 | 1359 | } |
b9db07fb | 1360 | |
1da177e4 LT |
1361 | return; |
1362 | } /* cypress_read_int_callback */ | |
1363 | ||
1364 | ||
1365 | static void cypress_write_int_callback(struct urb *urb, struct pt_regs *regs) | |
1366 | { | |
1367 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
1368 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1369 | int result; | |
1370 | ||
1371 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1372 | ||
1373 | switch (urb->status) { | |
1374 | case 0: | |
1375 | /* success */ | |
1376 | break; | |
1377 | case -ECONNRESET: | |
1378 | case -ENOENT: | |
1379 | case -ESHUTDOWN: | |
1380 | /* this urb is terminated, clean up */ | |
1381 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); | |
1382 | priv->write_urb_in_use = 0; | |
1383 | return; | |
3cb4a4f7 LM |
1384 | case -EPIPE: /* no break needed */ |
1385 | usb_clear_halt(port->serial->dev, 0x02); | |
1da177e4 LT |
1386 | default: |
1387 | /* error in the urb, so we have to resubmit it */ | |
1388 | dbg("%s - Overflow in write", __FUNCTION__); | |
1389 | dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); | |
1390 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
1391 | port->interrupt_out_urb->dev = port->serial->dev; | |
1392 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); | |
1393 | if (result) | |
1394 | dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", | |
1395 | __FUNCTION__, result); | |
1396 | else | |
1397 | return; | |
1398 | } | |
1399 | ||
1400 | priv->write_urb_in_use = 0; | |
1401 | ||
1402 | /* send any buffered data */ | |
1403 | cypress_send(port); | |
1404 | } | |
1405 | ||
1406 | ||
1407 | /***************************************************************************** | |
1408 | * Write buffer functions - buffering code from pl2303 used | |
1409 | *****************************************************************************/ | |
1410 | ||
1411 | /* | |
1412 | * cypress_buf_alloc | |
1413 | * | |
1414 | * Allocate a circular buffer and all associated memory. | |
1415 | */ | |
1416 | ||
1417 | static struct cypress_buf *cypress_buf_alloc(unsigned int size) | |
1418 | { | |
1419 | ||
1420 | struct cypress_buf *cb; | |
1421 | ||
1422 | ||
1423 | if (size == 0) | |
1424 | return NULL; | |
1425 | ||
1426 | cb = (struct cypress_buf *)kmalloc(sizeof(struct cypress_buf), GFP_KERNEL); | |
1427 | if (cb == NULL) | |
1428 | return NULL; | |
1429 | ||
1430 | cb->buf_buf = kmalloc(size, GFP_KERNEL); | |
1431 | if (cb->buf_buf == NULL) { | |
1432 | kfree(cb); | |
1433 | return NULL; | |
1434 | } | |
1435 | ||
1436 | cb->buf_size = size; | |
1437 | cb->buf_get = cb->buf_put = cb->buf_buf; | |
1438 | ||
1439 | return cb; | |
1440 | ||
1441 | } | |
1442 | ||
1443 | ||
1444 | /* | |
1445 | * cypress_buf_free | |
1446 | * | |
1447 | * Free the buffer and all associated memory. | |
1448 | */ | |
1449 | ||
1450 | static void cypress_buf_free(struct cypress_buf *cb) | |
1451 | { | |
1bc3c9e1 JJ |
1452 | if (cb) { |
1453 | kfree(cb->buf_buf); | |
1da177e4 LT |
1454 | kfree(cb); |
1455 | } | |
1456 | } | |
1457 | ||
1458 | ||
1459 | /* | |
1460 | * cypress_buf_clear | |
1461 | * | |
1462 | * Clear out all data in the circular buffer. | |
1463 | */ | |
1464 | ||
1465 | static void cypress_buf_clear(struct cypress_buf *cb) | |
1466 | { | |
1467 | if (cb != NULL) | |
1468 | cb->buf_get = cb->buf_put; | |
1469 | /* equivalent to a get of all data available */ | |
1470 | } | |
1471 | ||
1472 | ||
1473 | /* | |
1474 | * cypress_buf_data_avail | |
1475 | * | |
1476 | * Return the number of bytes of data available in the circular | |
1477 | * buffer. | |
1478 | */ | |
1479 | ||
1480 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb) | |
1481 | { | |
1482 | if (cb != NULL) | |
1483 | return ((cb->buf_size + cb->buf_put - cb->buf_get) % cb->buf_size); | |
1484 | else | |
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | ||
1489 | /* | |
1490 | * cypress_buf_space_avail | |
1491 | * | |
1492 | * Return the number of bytes of space available in the circular | |
1493 | * buffer. | |
1494 | */ | |
1495 | ||
1496 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb) | |
1497 | { | |
1498 | if (cb != NULL) | |
1499 | return ((cb->buf_size + cb->buf_get - cb->buf_put - 1) % cb->buf_size); | |
1500 | else | |
1501 | return 0; | |
1502 | } | |
1503 | ||
1504 | ||
1505 | /* | |
1506 | * cypress_buf_put | |
1507 | * | |
1508 | * Copy data data from a user buffer and put it into the circular buffer. | |
1509 | * Restrict to the amount of space available. | |
1510 | * | |
1511 | * Return the number of bytes copied. | |
1512 | */ | |
1513 | ||
1514 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, | |
1515 | unsigned int count) | |
1516 | { | |
1517 | ||
1518 | unsigned int len; | |
1519 | ||
1520 | ||
1521 | if (cb == NULL) | |
1522 | return 0; | |
1523 | ||
1524 | len = cypress_buf_space_avail(cb); | |
1525 | if (count > len) | |
1526 | count = len; | |
1527 | ||
1528 | if (count == 0) | |
1529 | return 0; | |
1530 | ||
1531 | len = cb->buf_buf + cb->buf_size - cb->buf_put; | |
1532 | if (count > len) { | |
1533 | memcpy(cb->buf_put, buf, len); | |
1534 | memcpy(cb->buf_buf, buf+len, count - len); | |
1535 | cb->buf_put = cb->buf_buf + count - len; | |
1536 | } else { | |
1537 | memcpy(cb->buf_put, buf, count); | |
1538 | if (count < len) | |
1539 | cb->buf_put += count; | |
1540 | else /* count == len */ | |
1541 | cb->buf_put = cb->buf_buf; | |
1542 | } | |
1543 | ||
1544 | return count; | |
1545 | ||
1546 | } | |
1547 | ||
1548 | ||
1549 | /* | |
1550 | * cypress_buf_get | |
1551 | * | |
1552 | * Get data from the circular buffer and copy to the given buffer. | |
1553 | * Restrict to the amount of data available. | |
1554 | * | |
1555 | * Return the number of bytes copied. | |
1556 | */ | |
1557 | ||
1558 | static unsigned int cypress_buf_get(struct cypress_buf *cb, 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_data_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_get; | |
1576 | if (count > len) { | |
1577 | memcpy(buf, cb->buf_get, len); | |
1578 | memcpy(buf+len, cb->buf_buf, count - len); | |
1579 | cb->buf_get = cb->buf_buf + count - len; | |
1580 | } else { | |
1581 | memcpy(buf, cb->buf_get, count); | |
1582 | if (count < len) | |
1583 | cb->buf_get += count; | |
1584 | else /* count == len */ | |
1585 | cb->buf_get = cb->buf_buf; | |
1586 | } | |
1587 | ||
1588 | return count; | |
1589 | ||
1590 | } | |
1591 | ||
1592 | /***************************************************************************** | |
1593 | * Module functions | |
1594 | *****************************************************************************/ | |
1595 | ||
1596 | static int __init cypress_init(void) | |
1597 | { | |
1598 | int retval; | |
1599 | ||
1600 | dbg("%s", __FUNCTION__); | |
1601 | ||
1602 | retval = usb_serial_register(&cypress_earthmate_device); | |
1603 | if (retval) | |
1604 | goto failed_em_register; | |
1605 | retval = usb_serial_register(&cypress_hidcom_device); | |
1606 | if (retval) | |
1607 | goto failed_hidcom_register; | |
a5c44e29 LM |
1608 | retval = usb_serial_register(&cypress_ca42v2_device); |
1609 | if (retval) | |
1610 | goto failed_ca42v2_register; | |
1da177e4 LT |
1611 | retval = usb_register(&cypress_driver); |
1612 | if (retval) | |
1613 | goto failed_usb_register; | |
1614 | ||
1615 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1616 | return 0; | |
1617 | failed_usb_register: | |
1618 | usb_deregister(&cypress_driver); | |
a5c44e29 LM |
1619 | failed_ca42v2_register: |
1620 | usb_serial_deregister(&cypress_ca42v2_device); | |
1da177e4 LT |
1621 | failed_hidcom_register: |
1622 | usb_serial_deregister(&cypress_hidcom_device); | |
1623 | failed_em_register: | |
1624 | usb_serial_deregister(&cypress_earthmate_device); | |
1625 | ||
1626 | return retval; | |
1627 | } | |
1628 | ||
1629 | ||
1630 | static void __exit cypress_exit (void) | |
1631 | { | |
1632 | dbg("%s", __FUNCTION__); | |
1633 | ||
1634 | usb_deregister (&cypress_driver); | |
1635 | usb_serial_deregister (&cypress_earthmate_device); | |
1636 | usb_serial_deregister (&cypress_hidcom_device); | |
a5c44e29 | 1637 | usb_serial_deregister (&cypress_ca42v2_device); |
1da177e4 LT |
1638 | } |
1639 | ||
1640 | ||
1641 | module_init(cypress_init); | |
1642 | module_exit(cypress_exit); | |
1643 | ||
1644 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1645 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1646 | MODULE_VERSION( DRIVER_VERSION ); | |
1647 | MODULE_LICENSE("GPL"); | |
1648 | ||
1649 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1650 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1651 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1652 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1653 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1654 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); |