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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 | ||
1da177e4 LT |
51 | #include <linux/kernel.h> |
52 | #include <linux/errno.h> | |
53 | #include <linux/init.h> | |
54 | #include <linux/slab.h> | |
55 | #include <linux/tty.h> | |
56 | #include <linux/tty_driver.h> | |
57 | #include <linux/tty_flip.h> | |
58 | #include <linux/module.h> | |
59 | #include <linux/moduleparam.h> | |
60 | #include <linux/spinlock.h> | |
61 | #include <linux/usb.h> | |
a969888c | 62 | #include <linux/usb/serial.h> |
1da177e4 LT |
63 | #include <linux/serial.h> |
64 | #include <linux/delay.h> | |
65 | #include <asm/uaccess.h> | |
66 | ||
1da177e4 LT |
67 | #include "cypress_m8.h" |
68 | ||
69 | ||
70 | #ifdef CONFIG_USB_SERIAL_DEBUG | |
71 | static int debug = 1; | |
72 | #else | |
73 | static int debug; | |
74 | #endif | |
75 | static int stats; | |
3cb4a4f7 | 76 | static int interval; |
1da177e4 LT |
77 | |
78 | /* | |
79 | * Version Information | |
80 | */ | |
3cb4a4f7 | 81 | #define DRIVER_VERSION "v1.09" |
1da177e4 LT |
82 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
83 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
84 | ||
85 | /* write buffer size defines */ | |
86 | #define CYPRESS_BUF_SIZE 1024 | |
87 | #define CYPRESS_CLOSING_WAIT (30*HZ) | |
88 | ||
89 | static struct usb_device_id id_table_earthmate [] = { | |
90 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
25b6f08e | 91 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
92 | { } /* Terminating entry */ |
93 | }; | |
94 | ||
95 | static struct usb_device_id id_table_cyphidcomrs232 [] = { | |
96 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, | |
97 | { } /* Terminating entry */ | |
98 | }; | |
99 | ||
a5c44e29 LM |
100 | static struct usb_device_id id_table_nokiaca42v2 [] = { |
101 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, | |
102 | { } /* Terminating entry */ | |
103 | }; | |
104 | ||
1da177e4 LT |
105 | static struct usb_device_id id_table_combined [] = { |
106 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, | |
25b6f08e | 107 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 108 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
a5c44e29 | 109 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
110 | { } /* Terminating entry */ |
111 | }; | |
112 | ||
113 | MODULE_DEVICE_TABLE (usb, id_table_combined); | |
114 | ||
115 | static struct usb_driver cypress_driver = { | |
116 | .name = "cypress", | |
117 | .probe = usb_serial_probe, | |
118 | .disconnect = usb_serial_disconnect, | |
119 | .id_table = id_table_combined, | |
ba9dc657 | 120 | .no_dynamic_id = 1, |
1da177e4 LT |
121 | }; |
122 | ||
123 | struct cypress_private { | |
124 | spinlock_t lock; /* private lock */ | |
125 | int chiptype; /* identifier of device, for quirks/etc */ | |
126 | int bytes_in; /* used for statistics */ | |
127 | int bytes_out; /* used for statistics */ | |
128 | int cmd_count; /* used for statistics */ | |
129 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
130 | struct cypress_buf *buf; /* write buffer */ | |
131 | int write_urb_in_use; /* write urb in use indicator */ | |
0257fa9f MI |
132 | int write_urb_interval; /* interval to use for write urb */ |
133 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 134 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
135 | int termios_initialized; |
136 | __u8 line_control; /* holds dtr / rts value */ | |
137 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
138 | __u8 current_config; /* stores the current configuration byte */ | |
139 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
140 | int baud_rate; /* stores current baud rate in integer form */ | |
141 | int cbr_mask; /* stores current baud rate in masked form */ | |
142 | int isthrottled; /* if throttled, discard reads */ | |
143 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
144 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
145 | /* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */ | |
146 | struct termios tmp_termios; /* stores the old termios settings */ | |
1da177e4 LT |
147 | }; |
148 | ||
149 | /* write buffer structure */ | |
150 | struct cypress_buf { | |
151 | unsigned int buf_size; | |
152 | char *buf_buf; | |
153 | char *buf_get; | |
154 | char *buf_put; | |
155 | }; | |
156 | ||
157 | /* function prototypes for the Cypress USB to serial device */ | |
158 | static int cypress_earthmate_startup (struct usb_serial *serial); | |
159 | static int cypress_hidcom_startup (struct usb_serial *serial); | |
a5c44e29 | 160 | static int cypress_ca42v2_startup (struct usb_serial *serial); |
1da177e4 LT |
161 | static void cypress_shutdown (struct usb_serial *serial); |
162 | static int cypress_open (struct usb_serial_port *port, struct file *filp); | |
163 | static void cypress_close (struct usb_serial_port *port, struct file *filp); | |
164 | static int cypress_write (struct usb_serial_port *port, const unsigned char *buf, int count); | |
165 | static void cypress_send (struct usb_serial_port *port); | |
166 | static int cypress_write_room (struct usb_serial_port *port); | |
167 | static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); | |
168 | static void cypress_set_termios (struct usb_serial_port *port, struct termios * old); | |
169 | static int cypress_tiocmget (struct usb_serial_port *port, struct file *file); | |
170 | static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); | |
171 | static int cypress_chars_in_buffer (struct usb_serial_port *port); | |
172 | static void cypress_throttle (struct usb_serial_port *port); | |
173 | static void cypress_unthrottle (struct usb_serial_port *port); | |
78aef519 | 174 | static void cypress_set_dead (struct usb_serial_port *port); |
7d12e780 DH |
175 | static void cypress_read_int_callback (struct urb *urb); |
176 | static void cypress_write_int_callback (struct urb *urb); | |
1da177e4 LT |
177 | /* baud helper functions */ |
178 | static int mask_to_rate (unsigned mask); | |
179 | static unsigned rate_to_mask (int rate); | |
180 | /* write buffer functions */ | |
181 | static struct cypress_buf *cypress_buf_alloc(unsigned int size); | |
182 | static void cypress_buf_free(struct cypress_buf *cb); | |
183 | static void cypress_buf_clear(struct cypress_buf *cb); | |
184 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb); | |
185 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb); | |
3cb4a4f7 LM |
186 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, unsigned int count); |
187 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, unsigned int count); | |
1da177e4 LT |
188 | |
189 | ||
ea65370d | 190 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
191 | .driver = { |
192 | .owner = THIS_MODULE, | |
269bda1c | 193 | .name = "earthmate", |
18fcac35 | 194 | }, |
269bda1c | 195 | .description = "DeLorme Earthmate USB", |
1da177e4 LT |
196 | .id_table = id_table_earthmate, |
197 | .num_interrupt_in = 1, | |
198 | .num_interrupt_out = 1, | |
199 | .num_bulk_in = NUM_DONT_CARE, | |
200 | .num_bulk_out = NUM_DONT_CARE, | |
201 | .num_ports = 1, | |
202 | .attach = cypress_earthmate_startup, | |
203 | .shutdown = cypress_shutdown, | |
204 | .open = cypress_open, | |
205 | .close = cypress_close, | |
206 | .write = cypress_write, | |
207 | .write_room = cypress_write_room, | |
208 | .ioctl = cypress_ioctl, | |
209 | .set_termios = cypress_set_termios, | |
210 | .tiocmget = cypress_tiocmget, | |
211 | .tiocmset = cypress_tiocmset, | |
212 | .chars_in_buffer = cypress_chars_in_buffer, | |
213 | .throttle = cypress_throttle, | |
214 | .unthrottle = cypress_unthrottle, | |
215 | .read_int_callback = cypress_read_int_callback, | |
216 | .write_int_callback = cypress_write_int_callback, | |
217 | }; | |
218 | ||
ea65370d | 219 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
220 | .driver = { |
221 | .owner = THIS_MODULE, | |
269bda1c | 222 | .name = "cyphidcom", |
18fcac35 | 223 | }, |
269bda1c | 224 | .description = "HID->COM RS232 Adapter", |
1da177e4 LT |
225 | .id_table = id_table_cyphidcomrs232, |
226 | .num_interrupt_in = 1, | |
227 | .num_interrupt_out = 1, | |
228 | .num_bulk_in = NUM_DONT_CARE, | |
229 | .num_bulk_out = NUM_DONT_CARE, | |
230 | .num_ports = 1, | |
231 | .attach = cypress_hidcom_startup, | |
232 | .shutdown = cypress_shutdown, | |
233 | .open = cypress_open, | |
234 | .close = cypress_close, | |
235 | .write = cypress_write, | |
236 | .write_room = cypress_write_room, | |
237 | .ioctl = cypress_ioctl, | |
238 | .set_termios = cypress_set_termios, | |
239 | .tiocmget = cypress_tiocmget, | |
240 | .tiocmset = cypress_tiocmset, | |
241 | .chars_in_buffer = cypress_chars_in_buffer, | |
242 | .throttle = cypress_throttle, | |
243 | .unthrottle = cypress_unthrottle, | |
244 | .read_int_callback = cypress_read_int_callback, | |
245 | .write_int_callback = cypress_write_int_callback, | |
246 | }; | |
247 | ||
a5c44e29 LM |
248 | static struct usb_serial_driver cypress_ca42v2_device = { |
249 | .driver = { | |
250 | .owner = THIS_MODULE, | |
251 | .name = "nokiaca42v2", | |
252 | }, | |
253 | .description = "Nokia CA-42 V2 Adapter", | |
254 | .id_table = id_table_nokiaca42v2, | |
255 | .num_interrupt_in = 1, | |
256 | .num_interrupt_out = 1, | |
257 | .num_bulk_in = NUM_DONT_CARE, | |
258 | .num_bulk_out = NUM_DONT_CARE, | |
259 | .num_ports = 1, | |
260 | .attach = cypress_ca42v2_startup, | |
261 | .shutdown = cypress_shutdown, | |
262 | .open = cypress_open, | |
263 | .close = cypress_close, | |
264 | .write = cypress_write, | |
265 | .write_room = cypress_write_room, | |
266 | .ioctl = cypress_ioctl, | |
267 | .set_termios = cypress_set_termios, | |
268 | .tiocmget = cypress_tiocmget, | |
269 | .tiocmset = cypress_tiocmset, | |
270 | .chars_in_buffer = cypress_chars_in_buffer, | |
271 | .throttle = cypress_throttle, | |
272 | .unthrottle = cypress_unthrottle, | |
273 | .read_int_callback = cypress_read_int_callback, | |
274 | .write_int_callback = cypress_write_int_callback, | |
275 | }; | |
1da177e4 LT |
276 | |
277 | /***************************************************************************** | |
278 | * Cypress serial helper functions | |
279 | *****************************************************************************/ | |
280 | ||
281 | ||
093cf723 | 282 | /* This function can either set or retrieve the current serial line settings */ |
1da177e4 LT |
283 | static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_mask, int data_bits, int stop_bits, |
284 | int parity_enable, int parity_type, int reset, int cypress_request_type) | |
285 | { | |
3cb4a4f7 | 286 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 287 | struct cypress_private *priv; |
3cb4a4f7 | 288 | __u8 feature_buffer[8]; |
1da177e4 LT |
289 | unsigned long flags; |
290 | ||
291 | dbg("%s", __FUNCTION__); | |
292 | ||
293 | priv = usb_get_serial_port_data(port); | |
294 | ||
78aef519 MI |
295 | if (!priv->comm_is_ok) |
296 | return -ENODEV; | |
297 | ||
1da177e4 LT |
298 | switch(cypress_request_type) { |
299 | case CYPRESS_SET_CONFIG: | |
300 | ||
301 | /* | |
302 | * The general purpose firmware for the Cypress M8 allows for a maximum speed | |
303 | * of 57600bps (I have no idea whether DeLorme chose to use the general purpose | |
304 | * firmware or not), if you need to modify this speed setting for your own | |
305 | * project please add your own chiptype and modify the code likewise. The | |
3cb4a4f7 LM |
306 | * Cypress HID->COM device will work successfully up to 115200bps (but the |
307 | * actual throughput is around 3kBps). | |
1da177e4 LT |
308 | */ |
309 | if (baud_mask != priv->cbr_mask) { | |
310 | dbg("%s - baud rate is changing", __FUNCTION__); | |
311 | if ( priv->chiptype == CT_EARTHMATE ) { | |
312 | /* 300 and 600 baud rates are supported under the generic firmware, | |
313 | * but are not used with NMEA and SiRF protocols */ | |
314 | ||
315 | if ( (baud_mask == B300) || (baud_mask == B600) ) { | |
3cb4a4f7 | 316 | err("%s - failed setting baud rate, unsupported speed", |
1da177e4 | 317 | __FUNCTION__); |
3cb4a4f7 LM |
318 | new_baudrate = priv->baud_rate; |
319 | } else 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 LT |
323 | } |
324 | } else if (priv->chiptype == CT_CYPHIDCOM) { | |
3cb4a4f7 LM |
325 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { |
326 | err("%s - failed setting baud rate, unsupported speed", | |
1da177e4 | 327 | __FUNCTION__); |
3cb4a4f7 | 328 | new_baudrate = priv->baud_rate; |
1da177e4 | 329 | } |
a5c44e29 LM |
330 | } else if (priv->chiptype == CT_CA42V2) { |
331 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { | |
332 | err("%s - failed setting baud rate, unsupported speed", | |
333 | __FUNCTION__); | |
334 | new_baudrate = priv->baud_rate; | |
335 | } | |
1da177e4 | 336 | } else if (priv->chiptype == CT_GENERIC) { |
3cb4a4f7 LM |
337 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { |
338 | err("%s - failed setting baud rate, unsupported speed", | |
1da177e4 | 339 | __FUNCTION__); |
3cb4a4f7 | 340 | new_baudrate = priv->baud_rate; |
1da177e4 LT |
341 | } |
342 | } else { | |
3cb4a4f7 LM |
343 | info("%s - please define your chiptype", __FUNCTION__); |
344 | new_baudrate = priv->baud_rate; | |
1da177e4 LT |
345 | } |
346 | } else { /* baud rate not changing, keep the old */ | |
3cb4a4f7 | 347 | new_baudrate = priv->baud_rate; |
1da177e4 | 348 | } |
3cb4a4f7 | 349 | dbg("%s - baud rate is being sent as %d", __FUNCTION__, new_baudrate); |
1da177e4 | 350 | |
3cb4a4f7 LM |
351 | memset(feature_buffer, 0, 8); |
352 | /* fill the feature_buffer with new configuration */ | |
353 | *((u_int32_t *)feature_buffer) = new_baudrate; | |
1da177e4 | 354 | |
3cb4a4f7 | 355 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
1da177e4 | 356 | /* 1 bit gap */ |
3cb4a4f7 LM |
357 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ |
358 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
359 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
1da177e4 | 360 | /* 1 bit gap */ |
3cb4a4f7 | 361 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ |
1da177e4 LT |
362 | |
363 | dbg("%s - device is being sent this feature report:", __FUNCTION__); | |
364 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __FUNCTION__, feature_buffer[0], feature_buffer[1], | |
365 | feature_buffer[2], feature_buffer[3], feature_buffer[4]); | |
366 | ||
3cb4a4f7 | 367 | do { |
1da177e4 LT |
368 | retval = usb_control_msg (port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), |
369 | HID_REQ_SET_REPORT, USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
3cb4a4f7 LM |
370 | 0x0300, 0, feature_buffer, 8, 500); |
371 | ||
372 | if (tries++ >= 3) | |
373 | break; | |
1da177e4 | 374 | |
48298e50 | 375 | } while (retval != 8 && retval != -ENODEV); |
3cb4a4f7 | 376 | |
78aef519 | 377 | if (retval != 8) { |
1da177e4 | 378 | err("%s - failed sending serial line settings - %d", __FUNCTION__, retval); |
78aef519 MI |
379 | cypress_set_dead(port); |
380 | } else { | |
1da177e4 | 381 | spin_lock_irqsave(&priv->lock, flags); |
3cb4a4f7 | 382 | priv->baud_rate = new_baudrate; |
1da177e4 | 383 | priv->cbr_mask = baud_mask; |
3cb4a4f7 | 384 | priv->current_config = feature_buffer[4]; |
1da177e4 LT |
385 | spin_unlock_irqrestore(&priv->lock, flags); |
386 | } | |
387 | break; | |
388 | case CYPRESS_GET_CONFIG: | |
389 | dbg("%s - retreiving serial line settings", __FUNCTION__); | |
3cb4a4f7 LM |
390 | /* set initial values in feature buffer */ |
391 | memset(feature_buffer, 0, 8); | |
1da177e4 | 392 | |
3cb4a4f7 | 393 | do { |
1da177e4 LT |
394 | retval = usb_control_msg (port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), |
395 | HID_REQ_GET_REPORT, USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
3cb4a4f7 LM |
396 | 0x0300, 0, feature_buffer, 8, 500); |
397 | ||
398 | if (tries++ >= 3) | |
399 | break; | |
400 | ||
48298e50 | 401 | } while (retval != 5 && retval != -ENODEV); |
3cb4a4f7 | 402 | |
1da177e4 | 403 | if (retval != 5) { |
943ffb58 | 404 | err("%s - failed to retrieve serial line settings - %d", __FUNCTION__, retval); |
78aef519 | 405 | cypress_set_dead(port); |
1da177e4 LT |
406 | return retval; |
407 | } else { | |
408 | spin_lock_irqsave(&priv->lock, flags); | |
3cb4a4f7 | 409 | |
1da177e4 LT |
410 | /* store the config in one byte, and later use bit masks to check values */ |
411 | priv->current_config = feature_buffer[4]; | |
3cb4a4f7 | 412 | priv->baud_rate = *((u_int32_t *)feature_buffer); |
1da177e4 | 413 | |
3cb4a4f7 | 414 | if ( (priv->cbr_mask = rate_to_mask(priv->baud_rate)) == 0x40) |
1da177e4 | 415 | dbg("%s - failed setting the baud mask (not defined)", __FUNCTION__); |
1da177e4 LT |
416 | spin_unlock_irqrestore(&priv->lock, flags); |
417 | } | |
1da177e4 | 418 | } |
3cb4a4f7 LM |
419 | spin_lock_irqsave(&priv->lock, flags); |
420 | ++priv->cmd_count; | |
421 | spin_unlock_irqrestore(&priv->lock, flags); | |
422 | ||
1da177e4 LT |
423 | return retval; |
424 | } /* cypress_serial_control */ | |
425 | ||
426 | ||
78aef519 MI |
427 | static void cypress_set_dead(struct usb_serial_port *port) |
428 | { | |
429 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
430 | unsigned long flags; | |
431 | ||
432 | spin_lock_irqsave(&priv->lock, flags); | |
433 | if (!priv->comm_is_ok) { | |
434 | spin_unlock_irqrestore(&priv->lock, flags); | |
435 | return; | |
436 | } | |
437 | priv->comm_is_ok = 0; | |
438 | spin_unlock_irqrestore(&priv->lock, flags); | |
439 | ||
440 | err("cypress_m8 suspending failing port %d - interval might be too short", | |
441 | port->number); | |
442 | } | |
443 | ||
444 | ||
3cb4a4f7 | 445 | /* given a baud mask, it will return integer baud on success */ |
1da177e4 LT |
446 | static int mask_to_rate (unsigned mask) |
447 | { | |
448 | int rate; | |
449 | ||
450 | switch (mask) { | |
451 | case B0: rate = 0; break; | |
452 | case B300: rate = 300; break; | |
453 | case B600: rate = 600; break; | |
454 | case B1200: rate = 1200; break; | |
455 | case B2400: rate = 2400; break; | |
456 | case B4800: rate = 4800; break; | |
457 | case B9600: rate = 9600; break; | |
458 | case B19200: rate = 19200; break; | |
459 | case B38400: rate = 38400; break; | |
460 | case B57600: rate = 57600; break; | |
461 | case B115200: rate = 115200; break; | |
462 | default: rate = -1; | |
463 | } | |
464 | ||
465 | return rate; | |
466 | } | |
467 | ||
468 | ||
469 | static unsigned rate_to_mask (int rate) | |
470 | { | |
471 | unsigned mask; | |
472 | ||
473 | switch (rate) { | |
474 | case 0: mask = B0; break; | |
475 | case 300: mask = B300; break; | |
476 | case 600: mask = B600; break; | |
477 | case 1200: mask = B1200; break; | |
478 | case 2400: mask = B2400; break; | |
479 | case 4800: mask = B4800; break; | |
480 | case 9600: mask = B9600; break; | |
481 | case 19200: mask = B19200; break; | |
482 | case 38400: mask = B38400; break; | |
483 | case 57600: mask = B57600; break; | |
484 | case 115200: mask = B115200; break; | |
485 | default: mask = 0x40; | |
486 | } | |
487 | ||
488 | return mask; | |
489 | } | |
490 | /***************************************************************************** | |
491 | * Cypress serial driver functions | |
492 | *****************************************************************************/ | |
493 | ||
494 | ||
495 | static int generic_startup (struct usb_serial *serial) | |
496 | { | |
497 | struct cypress_private *priv; | |
0257fa9f | 498 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 499 | |
0257fa9f | 500 | dbg("%s - port %d", __FUNCTION__, port->number); |
1da177e4 | 501 | |
80b6ca48 | 502 | priv = kzalloc(sizeof (struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
503 | if (!priv) |
504 | return -ENOMEM; | |
505 | ||
78aef519 | 506 | priv->comm_is_ok = !0; |
1da177e4 LT |
507 | spin_lock_init(&priv->lock); |
508 | priv->buf = cypress_buf_alloc(CYPRESS_BUF_SIZE); | |
509 | if (priv->buf == NULL) { | |
510 | kfree(priv); | |
511 | return -ENOMEM; | |
512 | } | |
513 | init_waitqueue_head(&priv->delta_msr_wait); | |
514 | ||
515 | usb_reset_configuration (serial->dev); | |
516 | ||
517 | priv->cmd_ctrl = 0; | |
518 | priv->line_control = 0; | |
519 | priv->termios_initialized = 0; | |
1da177e4 | 520 | priv->rx_flags = 0; |
3cb4a4f7 | 521 | priv->cbr_mask = B300; |
0257fa9f MI |
522 | if (interval > 0) { |
523 | priv->write_urb_interval = interval; | |
524 | priv->read_urb_interval = interval; | |
525 | dbg("%s - port %d read & write intervals forced to %d", | |
526 | __FUNCTION__,port->number,interval); | |
527 | } else { | |
528 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
529 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
530 | dbg("%s - port %d intervals: read=%d write=%d", | |
531 | __FUNCTION__,port->number, | |
532 | priv->read_urb_interval,priv->write_urb_interval); | |
533 | } | |
534 | usb_set_serial_port_data(port, priv); | |
1da177e4 | 535 | |
b9db07fb LM |
536 | return 0; |
537 | } | |
1da177e4 LT |
538 | |
539 | ||
540 | static int cypress_earthmate_startup (struct usb_serial *serial) | |
541 | { | |
542 | struct cypress_private *priv; | |
543 | ||
544 | dbg("%s", __FUNCTION__); | |
545 | ||
546 | if (generic_startup(serial)) { | |
b9db07fb LM |
547 | dbg("%s - Failed setting up port %d", __FUNCTION__, |
548 | serial->port[0]->number); | |
1da177e4 LT |
549 | return 1; |
550 | } | |
551 | ||
552 | priv = usb_get_serial_port_data(serial->port[0]); | |
553 | priv->chiptype = CT_EARTHMATE; | |
b9db07fb LM |
554 | |
555 | return 0; | |
1da177e4 LT |
556 | } /* cypress_earthmate_startup */ |
557 | ||
558 | ||
559 | static int cypress_hidcom_startup (struct usb_serial *serial) | |
560 | { | |
561 | struct cypress_private *priv; | |
562 | ||
563 | dbg("%s", __FUNCTION__); | |
564 | ||
565 | if (generic_startup(serial)) { | |
b9db07fb LM |
566 | dbg("%s - Failed setting up port %d", __FUNCTION__, |
567 | serial->port[0]->number); | |
1da177e4 LT |
568 | return 1; |
569 | } | |
570 | ||
571 | priv = usb_get_serial_port_data(serial->port[0]); | |
572 | priv->chiptype = CT_CYPHIDCOM; | |
573 | ||
b9db07fb | 574 | return 0; |
1da177e4 LT |
575 | } /* cypress_hidcom_startup */ |
576 | ||
577 | ||
a5c44e29 LM |
578 | static int cypress_ca42v2_startup (struct usb_serial *serial) |
579 | { | |
580 | struct cypress_private *priv; | |
581 | ||
582 | dbg("%s", __FUNCTION__); | |
583 | ||
584 | if (generic_startup(serial)) { | |
585 | dbg("%s - Failed setting up port %d", __FUNCTION__, | |
586 | serial->port[0]->number); | |
587 | return 1; | |
588 | } | |
589 | ||
590 | priv = usb_get_serial_port_data(serial->port[0]); | |
591 | priv->chiptype = CT_CA42V2; | |
592 | ||
593 | return 0; | |
594 | } /* cypress_ca42v2_startup */ | |
595 | ||
596 | ||
1da177e4 LT |
597 | static void cypress_shutdown (struct usb_serial *serial) |
598 | { | |
599 | struct cypress_private *priv; | |
600 | ||
601 | dbg ("%s - port %d", __FUNCTION__, serial->port[0]->number); | |
602 | ||
603 | /* all open ports are closed at this point */ | |
604 | ||
605 | priv = usb_get_serial_port_data(serial->port[0]); | |
606 | ||
607 | if (priv) { | |
608 | cypress_buf_free(priv->buf); | |
609 | kfree(priv); | |
610 | usb_set_serial_port_data(serial->port[0], NULL); | |
611 | } | |
612 | } | |
613 | ||
614 | ||
615 | static int cypress_open (struct usb_serial_port *port, struct file *filp) | |
616 | { | |
617 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
618 | struct usb_serial *serial = port->serial; | |
619 | unsigned long flags; | |
620 | int result = 0; | |
621 | ||
622 | dbg("%s - port %d", __FUNCTION__, port->number); | |
623 | ||
78aef519 MI |
624 | if (!priv->comm_is_ok) |
625 | return -EIO; | |
626 | ||
1da177e4 | 627 | /* clear halts before open */ |
1da177e4 LT |
628 | usb_clear_halt(serial->dev, 0x81); |
629 | usb_clear_halt(serial->dev, 0x02); | |
630 | ||
631 | spin_lock_irqsave(&priv->lock, flags); | |
632 | /* reset read/write statistics */ | |
633 | priv->bytes_in = 0; | |
634 | priv->bytes_out = 0; | |
635 | priv->cmd_count = 0; | |
636 | priv->rx_flags = 0; | |
637 | spin_unlock_irqrestore(&priv->lock, flags); | |
638 | ||
639 | /* setting to zero could cause data loss */ | |
640 | port->tty->low_latency = 1; | |
641 | ||
642 | /* raise both lines and set termios */ | |
643 | spin_lock_irqsave(&priv->lock, flags); | |
644 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
1da177e4 LT |
645 | priv->cmd_ctrl = 1; |
646 | spin_unlock_irqrestore(&priv->lock, flags); | |
647 | result = cypress_write(port, NULL, 0); | |
648 | ||
649 | if (result) { | |
650 | dev_err(&port->dev, "%s - failed setting the control lines - error %d\n", __FUNCTION__, result); | |
651 | return result; | |
652 | } else | |
653 | dbg("%s - success setting the control lines", __FUNCTION__); | |
654 | ||
655 | cypress_set_termios(port, &priv->tmp_termios); | |
656 | ||
657 | /* setup the port and start reading from the device */ | |
658 | if(!port->interrupt_in_urb){ | |
659 | err("%s - interrupt_in_urb is empty!", __FUNCTION__); | |
660 | return(-1); | |
661 | } | |
662 | ||
663 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
664 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
665 | port->interrupt_in_urb->transfer_buffer, port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 666 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
667 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
668 | ||
669 | if (result){ | |
670 | dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); | |
78aef519 | 671 | cypress_set_dead(port); |
1da177e4 LT |
672 | } |
673 | ||
674 | return result; | |
675 | } /* cypress_open */ | |
676 | ||
677 | ||
678 | static void cypress_close(struct usb_serial_port *port, struct file * filp) | |
679 | { | |
680 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
681 | unsigned int c_cflag; | |
682 | unsigned long flags; | |
683 | int bps; | |
684 | long timeout; | |
685 | wait_queue_t wait; | |
686 | ||
687 | dbg("%s - port %d", __FUNCTION__, port->number); | |
688 | ||
689 | /* wait for data to drain from buffer */ | |
690 | spin_lock_irqsave(&priv->lock, flags); | |
691 | timeout = CYPRESS_CLOSING_WAIT; | |
692 | init_waitqueue_entry(&wait, current); | |
693 | add_wait_queue(&port->tty->write_wait, &wait); | |
694 | for (;;) { | |
695 | set_current_state(TASK_INTERRUPTIBLE); | |
696 | if (cypress_buf_data_avail(priv->buf) == 0 | |
697 | || timeout == 0 || signal_pending(current) | |
698 | || !usb_get_intfdata(port->serial->interface)) | |
699 | break; | |
700 | spin_unlock_irqrestore(&priv->lock, flags); | |
701 | timeout = schedule_timeout(timeout); | |
702 | spin_lock_irqsave(&priv->lock, flags); | |
703 | } | |
704 | set_current_state(TASK_RUNNING); | |
705 | remove_wait_queue(&port->tty->write_wait, &wait); | |
706 | /* clear out any remaining data in the buffer */ | |
707 | cypress_buf_clear(priv->buf); | |
708 | spin_unlock_irqrestore(&priv->lock, flags); | |
709 | ||
710 | /* wait for characters to drain from device */ | |
711 | bps = tty_get_baud_rate(port->tty); | |
712 | if (bps > 1200) | |
713 | timeout = max((HZ*2560)/bps,HZ/10); | |
714 | else | |
715 | timeout = 2*HZ; | |
22c43863 | 716 | schedule_timeout_interruptible(timeout); |
1da177e4 LT |
717 | |
718 | dbg("%s - stopping urbs", __FUNCTION__); | |
719 | usb_kill_urb (port->interrupt_in_urb); | |
720 | usb_kill_urb (port->interrupt_out_urb); | |
721 | ||
722 | if (port->tty) { | |
723 | c_cflag = port->tty->termios->c_cflag; | |
724 | if (c_cflag & HUPCL) { | |
725 | /* drop dtr and rts */ | |
726 | priv = usb_get_serial_port_data(port); | |
727 | spin_lock_irqsave(&priv->lock, flags); | |
728 | priv->line_control = 0; | |
729 | priv->cmd_ctrl = 1; | |
730 | spin_unlock_irqrestore(&priv->lock, flags); | |
731 | cypress_write(port, NULL, 0); | |
732 | } | |
733 | } | |
734 | ||
735 | if (stats) | |
736 | dev_info (&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", | |
737 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
738 | } /* cypress_close */ | |
739 | ||
740 | ||
741 | static int cypress_write(struct usb_serial_port *port, const unsigned char *buf, int count) | |
742 | { | |
743 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
744 | unsigned long flags; | |
745 | ||
746 | dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); | |
747 | ||
748 | /* line control commands, which need to be executed immediately, | |
749 | are not put into the buffer for obvious reasons. | |
750 | */ | |
751 | if (priv->cmd_ctrl) { | |
752 | count = 0; | |
753 | goto finish; | |
754 | } | |
755 | ||
756 | if (!count) | |
757 | return count; | |
758 | ||
759 | spin_lock_irqsave(&priv->lock, flags); | |
760 | count = cypress_buf_put(priv->buf, buf, count); | |
761 | spin_unlock_irqrestore(&priv->lock, flags); | |
762 | ||
763 | finish: | |
764 | cypress_send(port); | |
765 | ||
766 | return count; | |
767 | } /* cypress_write */ | |
768 | ||
769 | ||
770 | static void cypress_send(struct usb_serial_port *port) | |
771 | { | |
772 | int count = 0, result, offset, actual_size; | |
773 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
774 | unsigned long flags; | |
775 | ||
78aef519 MI |
776 | if (!priv->comm_is_ok) |
777 | return; | |
778 | ||
1da177e4 LT |
779 | dbg("%s - port %d", __FUNCTION__, port->number); |
780 | dbg("%s - interrupt out size is %d", __FUNCTION__, port->interrupt_out_size); | |
781 | ||
782 | spin_lock_irqsave(&priv->lock, flags); | |
783 | if (priv->write_urb_in_use) { | |
784 | dbg("%s - can't write, urb in use", __FUNCTION__); | |
785 | spin_unlock_irqrestore(&priv->lock, flags); | |
786 | return; | |
787 | } | |
788 | spin_unlock_irqrestore(&priv->lock, flags); | |
789 | ||
790 | /* clear buffer */ | |
791 | memset(port->interrupt_out_urb->transfer_buffer, 0, port->interrupt_out_size); | |
792 | ||
793 | spin_lock_irqsave(&priv->lock, flags); | |
794 | switch (port->interrupt_out_size) { | |
795 | case 32: | |
3cb4a4f7 | 796 | /* this is for the CY7C64013... */ |
1da177e4 LT |
797 | offset = 2; |
798 | port->interrupt_out_buffer[0] = priv->line_control; | |
799 | break; | |
800 | case 8: | |
3cb4a4f7 | 801 | /* this is for the CY7C63743... */ |
1da177e4 LT |
802 | offset = 1; |
803 | port->interrupt_out_buffer[0] = priv->line_control; | |
804 | break; | |
805 | default: | |
806 | dbg("%s - wrong packet size", __FUNCTION__); | |
807 | spin_unlock_irqrestore(&priv->lock, flags); | |
808 | return; | |
809 | } | |
810 | ||
811 | if (priv->line_control & CONTROL_RESET) | |
812 | priv->line_control &= ~CONTROL_RESET; | |
813 | ||
814 | if (priv->cmd_ctrl) { | |
815 | priv->cmd_count++; | |
816 | dbg("%s - line control command being issued", __FUNCTION__); | |
817 | spin_unlock_irqrestore(&priv->lock, flags); | |
818 | goto send; | |
819 | } else | |
820 | spin_unlock_irqrestore(&priv->lock, flags); | |
821 | ||
822 | count = cypress_buf_get(priv->buf, &port->interrupt_out_buffer[offset], | |
823 | port->interrupt_out_size-offset); | |
824 | ||
825 | if (count == 0) { | |
826 | return; | |
827 | } | |
828 | ||
829 | switch (port->interrupt_out_size) { | |
830 | case 32: | |
831 | port->interrupt_out_buffer[1] = count; | |
832 | break; | |
833 | case 8: | |
834 | port->interrupt_out_buffer[0] |= count; | |
835 | } | |
836 | ||
837 | dbg("%s - count is %d", __FUNCTION__, count); | |
838 | ||
839 | send: | |
840 | spin_lock_irqsave(&priv->lock, flags); | |
841 | priv->write_urb_in_use = 1; | |
842 | spin_unlock_irqrestore(&priv->lock, flags); | |
843 | ||
844 | if (priv->cmd_ctrl) | |
845 | actual_size = 1; | |
846 | else | |
847 | actual_size = count + (port->interrupt_out_size == 32 ? 2 : 1); | |
848 | ||
849 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, port->interrupt_out_size, | |
850 | port->interrupt_out_urb->transfer_buffer); | |
851 | ||
9aa8dae7 MI |
852 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
853 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
854 | port->interrupt_out_buffer, port->interrupt_out_size, | |
855 | cypress_write_int_callback, port, priv->write_urb_interval); | |
1da177e4 LT |
856 | result = usb_submit_urb (port->interrupt_out_urb, GFP_ATOMIC); |
857 | if (result) { | |
858 | dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, | |
859 | result); | |
860 | priv->write_urb_in_use = 0; | |
78aef519 | 861 | cypress_set_dead(port); |
1da177e4 LT |
862 | } |
863 | ||
864 | spin_lock_irqsave(&priv->lock, flags); | |
865 | if (priv->cmd_ctrl) { | |
866 | priv->cmd_ctrl = 0; | |
867 | } | |
868 | priv->bytes_out += count; /* do not count the line control and size bytes */ | |
869 | spin_unlock_irqrestore(&priv->lock, flags); | |
870 | ||
cf2c7481 | 871 | usb_serial_port_softint(port); |
1da177e4 LT |
872 | } /* cypress_send */ |
873 | ||
874 | ||
875 | /* returns how much space is available in the soft buffer */ | |
876 | static int cypress_write_room(struct usb_serial_port *port) | |
877 | { | |
878 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
879 | int room = 0; | |
880 | unsigned long flags; | |
881 | ||
882 | dbg("%s - port %d", __FUNCTION__, port->number); | |
883 | ||
884 | spin_lock_irqsave(&priv->lock, flags); | |
885 | room = cypress_buf_space_avail(priv->buf); | |
886 | spin_unlock_irqrestore(&priv->lock, flags); | |
887 | ||
888 | dbg("%s - returns %d", __FUNCTION__, room); | |
889 | return room; | |
890 | } | |
891 | ||
892 | ||
893 | static int cypress_tiocmget (struct usb_serial_port *port, struct file *file) | |
894 | { | |
895 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
896 | __u8 status, control; | |
897 | unsigned int result = 0; | |
898 | unsigned long flags; | |
899 | ||
900 | dbg("%s - port %d", __FUNCTION__, port->number); | |
901 | ||
902 | spin_lock_irqsave(&priv->lock, flags); | |
903 | control = priv->line_control; | |
904 | status = priv->current_status; | |
905 | spin_unlock_irqrestore(&priv->lock, flags); | |
906 | ||
907 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
908 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
909 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
910 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
911 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
912 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
913 | ||
914 | dbg("%s - result = %x", __FUNCTION__, result); | |
915 | ||
916 | return result; | |
917 | } | |
918 | ||
919 | ||
920 | static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, | |
921 | unsigned int set, unsigned int clear) | |
922 | { | |
923 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
924 | unsigned long flags; | |
925 | ||
926 | dbg("%s - port %d", __FUNCTION__, port->number); | |
927 | ||
928 | spin_lock_irqsave(&priv->lock, flags); | |
929 | if (set & TIOCM_RTS) | |
930 | priv->line_control |= CONTROL_RTS; | |
931 | if (set & TIOCM_DTR) | |
932 | priv->line_control |= CONTROL_DTR; | |
933 | if (clear & TIOCM_RTS) | |
934 | priv->line_control &= ~CONTROL_RTS; | |
935 | if (clear & TIOCM_DTR) | |
936 | priv->line_control &= ~CONTROL_DTR; | |
937 | spin_unlock_irqrestore(&priv->lock, flags); | |
938 | ||
939 | priv->cmd_ctrl = 1; | |
940 | return cypress_write(port, NULL, 0); | |
941 | } | |
942 | ||
943 | ||
944 | static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) | |
945 | { | |
946 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
947 | ||
948 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); | |
949 | ||
950 | switch (cmd) { | |
951 | case TIOCGSERIAL: | |
952 | if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { | |
953 | return -EFAULT; | |
954 | } | |
955 | return (0); | |
956 | break; | |
957 | case TIOCSSERIAL: | |
958 | if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { | |
959 | return -EFAULT; | |
960 | } | |
961 | /* here we need to call cypress_set_termios to invoke the new settings */ | |
962 | cypress_set_termios(port, &priv->tmp_termios); | |
963 | return (0); | |
964 | break; | |
965 | /* these are called when setting baud rate from gpsd */ | |
966 | case TCGETS: | |
967 | if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { | |
968 | return -EFAULT; | |
969 | } | |
970 | return (0); | |
971 | break; | |
972 | case TCSETS: | |
973 | if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { | |
974 | return -EFAULT; | |
975 | } | |
976 | /* here we need to call cypress_set_termios to invoke the new settings */ | |
977 | cypress_set_termios(port, &priv->tmp_termios); | |
978 | return (0); | |
979 | break; | |
980 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ | |
981 | case TIOCMIWAIT: | |
982 | while (priv != NULL) { | |
983 | interruptible_sleep_on(&priv->delta_msr_wait); | |
984 | /* see if a signal did it */ | |
985 | if (signal_pending(current)) | |
986 | return -ERESTARTSYS; | |
987 | else { | |
988 | char diff = priv->diff_status; | |
989 | ||
990 | if (diff == 0) { | |
991 | return -EIO; /* no change => error */ | |
992 | } | |
993 | ||
994 | /* consume all events */ | |
995 | priv->diff_status = 0; | |
996 | ||
997 | /* return 0 if caller wanted to know about these bits */ | |
998 | if ( ((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
999 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
1000 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
1001 | ((arg & TIOCM_CTS) && (diff & UART_CTS)) ) { | |
1002 | return 0; | |
1003 | } | |
1004 | /* otherwise caller can't care less about what happened, | |
1005 | * and so we continue to wait for more events. | |
1006 | */ | |
1007 | } | |
1008 | } | |
1009 | return 0; | |
1010 | break; | |
1011 | default: | |
1012 | break; | |
1013 | } | |
1014 | ||
1015 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __FUNCTION__, cmd); | |
1016 | ||
1017 | return -ENOIOCTLCMD; | |
1018 | } /* cypress_ioctl */ | |
1019 | ||
1020 | ||
b9db07fb LM |
1021 | static void cypress_set_termios (struct usb_serial_port *port, |
1022 | struct termios *old_termios) | |
1da177e4 LT |
1023 | { |
1024 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1025 | struct tty_struct *tty; | |
1026 | int data_bits, stop_bits, parity_type, parity_enable; | |
1027 | unsigned cflag, iflag, baud_mask; | |
1028 | unsigned long flags; | |
1029 | __u8 oldlines; | |
3cb4a4f7 | 1030 | int linechange = 0; |
b9db07fb | 1031 | |
1da177e4 LT |
1032 | dbg("%s - port %d", __FUNCTION__, port->number); |
1033 | ||
1034 | tty = port->tty; | |
1035 | if ((!tty) || (!tty->termios)) { | |
1036 | dbg("%s - no tty structures", __FUNCTION__); | |
1037 | return; | |
1038 | } | |
1039 | ||
1040 | spin_lock_irqsave(&priv->lock, flags); | |
1041 | if (!priv->termios_initialized) { | |
1042 | if (priv->chiptype == CT_EARTHMATE) { | |
1043 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
1044 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
1045 | CLOCAL; | |
1da177e4 LT |
1046 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
1047 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
1048 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
1049 | CLOCAL; | |
a5c44e29 LM |
1050 | } else if (priv->chiptype == CT_CA42V2) { |
1051 | *(tty->termios) = tty_std_termios; | |
1052 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1053 | CLOCAL; | |
1da177e4 LT |
1054 | } |
1055 | priv->termios_initialized = 1; | |
1056 | } | |
1057 | spin_unlock_irqrestore(&priv->lock, flags); | |
1058 | ||
1059 | cflag = tty->termios->c_cflag; | |
1060 | iflag = tty->termios->c_iflag; | |
1061 | ||
1062 | /* check if there are new settings */ | |
1063 | if (old_termios) { | |
1064 | if ((cflag != old_termios->c_cflag) || | |
b9db07fb LM |
1065 | (RELEVANT_IFLAG(iflag) != |
1066 | RELEVANT_IFLAG(old_termios->c_iflag))) { | |
1067 | dbg("%s - attempting to set new termios settings", | |
1068 | __FUNCTION__); | |
1069 | /* should make a copy of this in case something goes | |
1070 | * wrong in the function, we can restore it */ | |
1da177e4 LT |
1071 | spin_lock_irqsave(&priv->lock, flags); |
1072 | priv->tmp_termios = *(tty->termios); | |
b9db07fb | 1073 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1074 | } else { |
1075 | dbg("%s - nothing to do, exiting", __FUNCTION__); | |
1076 | return; | |
1077 | } | |
1078 | } else | |
1079 | return; | |
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 | ||
1094 | if (cflag & CSIZE) { | |
1095 | switch (cflag & CSIZE) { | |
b9db07fb LM |
1096 | case CS5: |
1097 | data_bits = 0; | |
1098 | break; | |
1099 | case CS6: | |
1100 | data_bits = 1; | |
1101 | break; | |
1102 | case CS7: | |
1103 | data_bits = 2; | |
1104 | break; | |
1105 | case CS8: | |
1106 | data_bits = 3; | |
1107 | break; | |
1108 | default: | |
1109 | err("%s - CSIZE was set, but not CS5-CS8", | |
1110 | __FUNCTION__); | |
1111 | data_bits = 3; | |
1da177e4 LT |
1112 | } |
1113 | } else | |
1114 | data_bits = 3; | |
1115 | ||
1116 | spin_lock_irqsave(&priv->lock, flags); | |
1117 | oldlines = priv->line_control; | |
1118 | if ((cflag & CBAUD) == B0) { | |
1119 | /* drop dtr and rts */ | |
1120 | dbg("%s - dropping the lines, baud rate 0bps", __FUNCTION__); | |
1121 | baud_mask = B0; | |
1122 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
1123 | } else { | |
1124 | baud_mask = (cflag & CBAUD); | |
1125 | switch(baud_mask) { | |
b9db07fb LM |
1126 | case B300: |
1127 | dbg("%s - setting baud 300bps", __FUNCTION__); | |
1128 | break; | |
1129 | case B600: | |
1130 | dbg("%s - setting baud 600bps", __FUNCTION__); | |
1131 | break; | |
1132 | case B1200: | |
1133 | dbg("%s - setting baud 1200bps", __FUNCTION__); | |
1134 | break; | |
1135 | case B2400: | |
1136 | dbg("%s - setting baud 2400bps", __FUNCTION__); | |
1137 | break; | |
1138 | case B4800: | |
1139 | dbg("%s - setting baud 4800bps", __FUNCTION__); | |
1140 | break; | |
1141 | case B9600: | |
1142 | dbg("%s - setting baud 9600bps", __FUNCTION__); | |
1143 | break; | |
1144 | case B19200: | |
1145 | dbg("%s - setting baud 19200bps", __FUNCTION__); | |
1146 | break; | |
1147 | case B38400: | |
1148 | dbg("%s - setting baud 38400bps", __FUNCTION__); | |
1149 | break; | |
1150 | case B57600: | |
1151 | dbg("%s - setting baud 57600bps", __FUNCTION__); | |
1152 | break; | |
1153 | case B115200: | |
1154 | dbg("%s - setting baud 115200bps", __FUNCTION__); | |
1155 | break; | |
1156 | default: | |
1157 | dbg("%s - unknown masked baud rate", __FUNCTION__); | |
1da177e4 | 1158 | } |
3cb4a4f7 | 1159 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 LT |
1160 | } |
1161 | spin_unlock_irqrestore(&priv->lock, flags); | |
1da177e4 | 1162 | |
b9db07fb LM |
1163 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, " |
1164 | "%d data_bits (+5)", __FUNCTION__, stop_bits, | |
1165 | parity_enable, parity_type, data_bits); | |
1166 | ||
1167 | cypress_serial_control(port, baud_mask, data_bits, stop_bits, | |
1168 | parity_enable, parity_type, 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1169 | |
b9db07fb LM |
1170 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1171 | * filled into the private structure this should confirm that all is | |
1172 | * working if it returns what we just set */ | |
1da177e4 LT |
1173 | cypress_serial_control(port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1174 | ||
b9db07fb LM |
1175 | /* Here we can define custom tty settings for devices; the main tty |
1176 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1177 | |
b9db07fb | 1178 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 1179 | if ( (priv->chiptype == CT_EARTHMATE) && (priv->baud_rate == 4800) ) { |
b9db07fb LM |
1180 | dbg("Using custom termios settings for a baud rate of " |
1181 | "4800bps."); | |
1da177e4 LT |
1182 | /* define custom termios settings for NMEA protocol */ |
1183 | ||
1da177e4 | 1184 | tty->termios->c_iflag /* input modes - */ |
b9db07fb LM |
1185 | &= ~(IGNBRK /* disable ignore break */ |
1186 | | BRKINT /* disable break causes interrupt */ | |
1187 | | PARMRK /* disable mark parity errors */ | |
1188 | | ISTRIP /* disable clear high bit of input char */ | |
1189 | | INLCR /* disable translate NL to CR */ | |
1190 | | IGNCR /* disable ignore CR */ | |
1191 | | ICRNL /* disable translate CR to NL */ | |
1192 | | IXON); /* disable enable XON/XOFF flow control */ | |
1193 | ||
1da177e4 | 1194 | tty->termios->c_oflag /* output modes */ |
b9db07fb | 1195 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1196 | |
b9db07fb LM |
1197 | tty->termios->c_lflag /* line discipline modes */ |
1198 | &= ~(ECHO /* disable echo input characters */ | |
1199 | | ECHONL /* disable echo new line */ | |
1200 | | ICANON /* disable erase, kill, werase, and rprnt | |
1201 | special characters */ | |
1202 | | ISIG /* disable interrupt, quit, and suspend | |
1203 | special characters */ | |
1204 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1205 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1206 | |
1da177e4 LT |
1207 | linechange = (priv->line_control != oldlines); |
1208 | spin_unlock_irqrestore(&priv->lock, flags); | |
1209 | ||
1210 | /* if necessary, set lines */ | |
3cb4a4f7 | 1211 | if (linechange) { |
1da177e4 LT |
1212 | priv->cmd_ctrl = 1; |
1213 | cypress_write(port, NULL, 0); | |
1214 | } | |
1da177e4 LT |
1215 | } /* cypress_set_termios */ |
1216 | ||
b9db07fb | 1217 | |
1da177e4 LT |
1218 | /* returns amount of data still left in soft buffer */ |
1219 | static int cypress_chars_in_buffer(struct usb_serial_port *port) | |
1220 | { | |
1221 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1222 | int chars = 0; | |
1223 | unsigned long flags; | |
1224 | ||
1225 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1226 | ||
1227 | spin_lock_irqsave(&priv->lock, flags); | |
1228 | chars = cypress_buf_data_avail(priv->buf); | |
1229 | spin_unlock_irqrestore(&priv->lock, flags); | |
1230 | ||
1231 | dbg("%s - returns %d", __FUNCTION__, chars); | |
1232 | return chars; | |
1233 | } | |
1234 | ||
1235 | ||
1236 | static void cypress_throttle (struct usb_serial_port *port) | |
1237 | { | |
1238 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1239 | unsigned long flags; | |
1240 | ||
1241 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1242 | ||
1243 | spin_lock_irqsave(&priv->lock, flags); | |
1244 | priv->rx_flags = THROTTLED; | |
b9db07fb | 1245 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
1246 | } |
1247 | ||
1248 | ||
1249 | static void cypress_unthrottle (struct usb_serial_port *port) | |
1250 | { | |
1251 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1252 | int actually_throttled, result; | |
1253 | unsigned long flags; | |
1254 | ||
1255 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1256 | ||
1257 | spin_lock_irqsave(&priv->lock, flags); | |
1258 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; | |
1259 | priv->rx_flags = 0; | |
1260 | spin_unlock_irqrestore(&priv->lock, flags); | |
1261 | ||
78aef519 MI |
1262 | if (!priv->comm_is_ok) |
1263 | return; | |
1264 | ||
1da177e4 LT |
1265 | if (actually_throttled) { |
1266 | port->interrupt_in_urb->dev = port->serial->dev; | |
1267 | ||
1268 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); | |
78aef519 | 1269 | if (result) { |
b9db07fb LM |
1270 | dev_err(&port->dev, "%s - failed submitting read urb, " |
1271 | "error %d\n", __FUNCTION__, result); | |
78aef519 MI |
1272 | cypress_set_dead(port); |
1273 | } | |
1da177e4 LT |
1274 | } |
1275 | } | |
1276 | ||
1277 | ||
7d12e780 | 1278 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 LT |
1279 | { |
1280 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
1281 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1282 | struct tty_struct *tty; | |
1283 | unsigned char *data = urb->transfer_buffer; | |
1284 | unsigned long flags; | |
b9db07fb | 1285 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1286 | int havedata = 0; |
1287 | int bytes = 0; | |
1288 | int result; | |
1289 | int i = 0; | |
1290 | ||
1291 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1292 | ||
78aef519 MI |
1293 | switch (urb->status) { |
1294 | case 0: /* success */ | |
1295 | break; | |
1296 | case -ECONNRESET: | |
1297 | case -ENOENT: | |
1298 | case -ESHUTDOWN: | |
1299 | /* precursor to disconnect so just go away */ | |
1300 | return; | |
1301 | case -EPIPE: | |
1302 | usb_clear_halt(port->serial->dev,0x81); | |
1303 | break; | |
1304 | default: | |
1305 | /* something ugly is going on... */ | |
1306 | dev_err(&urb->dev->dev,"%s - unexpected nonzero read status received: %d\n", | |
1307 | __FUNCTION__,urb->status); | |
1308 | cypress_set_dead(port); | |
1da177e4 LT |
1309 | return; |
1310 | } | |
1311 | ||
1312 | spin_lock_irqsave(&priv->lock, flags); | |
1313 | if (priv->rx_flags & THROTTLED) { | |
1314 | dbg("%s - now throttling", __FUNCTION__); | |
1315 | priv->rx_flags |= ACTUALLY_THROTTLED; | |
1316 | spin_unlock_irqrestore(&priv->lock, flags); | |
1317 | return; | |
1318 | } | |
1319 | spin_unlock_irqrestore(&priv->lock, flags); | |
1320 | ||
1321 | tty = port->tty; | |
1322 | if (!tty) { | |
1323 | dbg("%s - bad tty pointer - exiting", __FUNCTION__); | |
1324 | return; | |
1325 | } | |
1326 | ||
1327 | spin_lock_irqsave(&priv->lock, flags); | |
1328 | switch(urb->actual_length) { | |
1329 | case 32: | |
3cb4a4f7 | 1330 | /* This is for the CY7C64013... */ |
1da177e4 | 1331 | priv->current_status = data[0] & 0xF8; |
b9db07fb LM |
1332 | bytes = data[1] + 2; |
1333 | i = 2; | |
1da177e4 LT |
1334 | if (bytes > 2) |
1335 | havedata = 1; | |
1336 | break; | |
1337 | case 8: | |
3cb4a4f7 | 1338 | /* This is for the CY7C63743... */ |
1da177e4 | 1339 | priv->current_status = data[0] & 0xF8; |
b9db07fb LM |
1340 | bytes = (data[0] & 0x07) + 1; |
1341 | i = 1; | |
1da177e4 LT |
1342 | if (bytes > 1) |
1343 | havedata = 1; | |
1344 | break; | |
1345 | default: | |
b9db07fb LM |
1346 | dbg("%s - wrong packet size - received %d bytes", |
1347 | __FUNCTION__, urb->actual_length); | |
1da177e4 LT |
1348 | spin_unlock_irqrestore(&priv->lock, flags); |
1349 | goto continue_read; | |
1350 | } | |
1351 | spin_unlock_irqrestore(&priv->lock, flags); | |
1352 | ||
b9db07fb LM |
1353 | usb_serial_debug_data (debug, &port->dev, __FUNCTION__, |
1354 | urb->actual_length, data); | |
1da177e4 LT |
1355 | |
1356 | spin_lock_irqsave(&priv->lock, flags); | |
1357 | /* check to see if status has changed */ | |
1358 | if (priv != NULL) { | |
1359 | if (priv->current_status != priv->prev_status) { | |
b9db07fb LM |
1360 | priv->diff_status |= priv->current_status ^ |
1361 | priv->prev_status; | |
1da177e4 LT |
1362 | wake_up_interruptible(&priv->delta_msr_wait); |
1363 | priv->prev_status = priv->current_status; | |
1364 | } | |
1365 | } | |
b9db07fb | 1366 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1367 | |
b9db07fb LM |
1368 | /* hangup, as defined in acm.c... this might be a bad place for it |
1369 | * though */ | |
1370 | if (tty && !(tty->termios->c_cflag & CLOCAL) && | |
1371 | !(priv->current_status & UART_CD)) { | |
1da177e4 LT |
1372 | dbg("%s - calling hangup", __FUNCTION__); |
1373 | tty_hangup(tty); | |
1374 | goto continue_read; | |
1375 | } | |
1376 | ||
b9db07fb LM |
1377 | /* There is one error bit... I'm assuming it is a parity error |
1378 | * indicator as the generic firmware will set this bit to 1 if a | |
1379 | * parity error occurs. | |
1380 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1381 | spin_lock_irqsave(&priv->lock, flags); |
1382 | if (priv->current_status & CYP_ERROR) { | |
1383 | spin_unlock_irqrestore(&priv->lock, flags); | |
1384 | tty_flag = TTY_PARITY; | |
1385 | dbg("%s - Parity Error detected", __FUNCTION__); | |
1386 | } else | |
1387 | spin_unlock_irqrestore(&priv->lock, flags); | |
1388 | ||
1389 | /* process read if there is data other than line status */ | |
1390 | if (tty && (bytes > i)) { | |
33f0f88f | 1391 | bytes = tty_buffer_request_room(tty, bytes); |
1da177e4 | 1392 | for (; i < bytes ; ++i) { |
b9db07fb LM |
1393 | dbg("pushing byte number %d - %d - %c", i, data[i], |
1394 | data[i]); | |
1da177e4 LT |
1395 | tty_insert_flip_char(tty, data[i], tty_flag); |
1396 | } | |
1397 | tty_flip_buffer_push(port->tty); | |
1398 | } | |
1399 | ||
1400 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1401 | /* control and status byte(s) are also counted */ |
1402 | priv->bytes_in += bytes; | |
1da177e4 LT |
1403 | spin_unlock_irqrestore(&priv->lock, flags); |
1404 | ||
1405 | continue_read: | |
b9db07fb LM |
1406 | |
1407 | /* Continue trying to always read... unless the port has closed. */ | |
1da177e4 | 1408 | |
78aef519 | 1409 | if (port->open_count > 0 && priv->comm_is_ok) { |
b9db07fb LM |
1410 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1411 | usb_rcvintpipe(port->serial->dev, | |
1412 | port->interrupt_in_endpointAddress), | |
1413 | port->interrupt_in_urb->transfer_buffer, | |
1414 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 1415 | cypress_read_int_callback, port, priv->read_urb_interval); |
b9db07fb | 1416 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
78aef519 | 1417 | if (result) { |
b9db07fb LM |
1418 | dev_err(&urb->dev->dev, "%s - failed resubmitting " |
1419 | "read urb, error %d\n", __FUNCTION__, | |
1420 | result); | |
78aef519 MI |
1421 | cypress_set_dead(port); |
1422 | } | |
1da177e4 | 1423 | } |
b9db07fb | 1424 | |
1da177e4 LT |
1425 | return; |
1426 | } /* cypress_read_int_callback */ | |
1427 | ||
1428 | ||
7d12e780 | 1429 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 LT |
1430 | { |
1431 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; | |
1432 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1433 | int result; | |
1434 | ||
1435 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1436 | ||
1437 | switch (urb->status) { | |
1438 | case 0: | |
1439 | /* success */ | |
1440 | break; | |
1441 | case -ECONNRESET: | |
1442 | case -ENOENT: | |
1443 | case -ESHUTDOWN: | |
1444 | /* this urb is terminated, clean up */ | |
1445 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); | |
1446 | priv->write_urb_in_use = 0; | |
1447 | return; | |
78aef519 MI |
1448 | case -EPIPE: /* no break needed; clear halt and resubmit */ |
1449 | if (!priv->comm_is_ok) | |
1450 | break; | |
3cb4a4f7 | 1451 | usb_clear_halt(port->serial->dev, 0x02); |
1da177e4 | 1452 | /* error in the urb, so we have to resubmit it */ |
1da177e4 LT |
1453 | dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); |
1454 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
1455 | port->interrupt_out_urb->dev = port->serial->dev; | |
1456 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); | |
78aef519 | 1457 | if (!result) |
1da177e4 | 1458 | return; |
78aef519 MI |
1459 | dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", |
1460 | __FUNCTION__, result); | |
1461 | cypress_set_dead(port); | |
1462 | break; | |
1463 | default: | |
1464 | dev_err(&urb->dev->dev,"%s - unexpected nonzero write status received: %d\n", | |
1465 | __FUNCTION__,urb->status); | |
1466 | cypress_set_dead(port); | |
1467 | break; | |
1da177e4 LT |
1468 | } |
1469 | ||
1470 | priv->write_urb_in_use = 0; | |
1471 | ||
1472 | /* send any buffered data */ | |
1473 | cypress_send(port); | |
1474 | } | |
1475 | ||
1476 | ||
1477 | /***************************************************************************** | |
1478 | * Write buffer functions - buffering code from pl2303 used | |
1479 | *****************************************************************************/ | |
1480 | ||
1481 | /* | |
1482 | * cypress_buf_alloc | |
1483 | * | |
1484 | * Allocate a circular buffer and all associated memory. | |
1485 | */ | |
1486 | ||
1487 | static struct cypress_buf *cypress_buf_alloc(unsigned int size) | |
1488 | { | |
1489 | ||
1490 | struct cypress_buf *cb; | |
1491 | ||
1492 | ||
1493 | if (size == 0) | |
1494 | return NULL; | |
1495 | ||
1496 | cb = (struct cypress_buf *)kmalloc(sizeof(struct cypress_buf), GFP_KERNEL); | |
1497 | if (cb == NULL) | |
1498 | return NULL; | |
1499 | ||
1500 | cb->buf_buf = kmalloc(size, GFP_KERNEL); | |
1501 | if (cb->buf_buf == NULL) { | |
1502 | kfree(cb); | |
1503 | return NULL; | |
1504 | } | |
1505 | ||
1506 | cb->buf_size = size; | |
1507 | cb->buf_get = cb->buf_put = cb->buf_buf; | |
1508 | ||
1509 | return cb; | |
1510 | ||
1511 | } | |
1512 | ||
1513 | ||
1514 | /* | |
1515 | * cypress_buf_free | |
1516 | * | |
1517 | * Free the buffer and all associated memory. | |
1518 | */ | |
1519 | ||
1520 | static void cypress_buf_free(struct cypress_buf *cb) | |
1521 | { | |
1bc3c9e1 JJ |
1522 | if (cb) { |
1523 | kfree(cb->buf_buf); | |
1da177e4 LT |
1524 | kfree(cb); |
1525 | } | |
1526 | } | |
1527 | ||
1528 | ||
1529 | /* | |
1530 | * cypress_buf_clear | |
1531 | * | |
1532 | * Clear out all data in the circular buffer. | |
1533 | */ | |
1534 | ||
1535 | static void cypress_buf_clear(struct cypress_buf *cb) | |
1536 | { | |
1537 | if (cb != NULL) | |
1538 | cb->buf_get = cb->buf_put; | |
1539 | /* equivalent to a get of all data available */ | |
1540 | } | |
1541 | ||
1542 | ||
1543 | /* | |
1544 | * cypress_buf_data_avail | |
1545 | * | |
1546 | * Return the number of bytes of data available in the circular | |
1547 | * buffer. | |
1548 | */ | |
1549 | ||
1550 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb) | |
1551 | { | |
1552 | if (cb != NULL) | |
1553 | return ((cb->buf_size + cb->buf_put - cb->buf_get) % cb->buf_size); | |
1554 | else | |
1555 | return 0; | |
1556 | } | |
1557 | ||
1558 | ||
1559 | /* | |
1560 | * cypress_buf_space_avail | |
1561 | * | |
1562 | * Return the number of bytes of space available in the circular | |
1563 | * buffer. | |
1564 | */ | |
1565 | ||
1566 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb) | |
1567 | { | |
1568 | if (cb != NULL) | |
1569 | return ((cb->buf_size + cb->buf_get - cb->buf_put - 1) % cb->buf_size); | |
1570 | else | |
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | ||
1575 | /* | |
1576 | * cypress_buf_put | |
1577 | * | |
1578 | * Copy data data from a user buffer and put it into the circular buffer. | |
1579 | * Restrict to the amount of space available. | |
1580 | * | |
1581 | * Return the number of bytes copied. | |
1582 | */ | |
1583 | ||
1584 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, | |
1585 | unsigned int count) | |
1586 | { | |
1587 | ||
1588 | unsigned int len; | |
1589 | ||
1590 | ||
1591 | if (cb == NULL) | |
1592 | return 0; | |
1593 | ||
1594 | len = cypress_buf_space_avail(cb); | |
1595 | if (count > len) | |
1596 | count = len; | |
1597 | ||
1598 | if (count == 0) | |
1599 | return 0; | |
1600 | ||
1601 | len = cb->buf_buf + cb->buf_size - cb->buf_put; | |
1602 | if (count > len) { | |
1603 | memcpy(cb->buf_put, buf, len); | |
1604 | memcpy(cb->buf_buf, buf+len, count - len); | |
1605 | cb->buf_put = cb->buf_buf + count - len; | |
1606 | } else { | |
1607 | memcpy(cb->buf_put, buf, count); | |
1608 | if (count < len) | |
1609 | cb->buf_put += count; | |
1610 | else /* count == len */ | |
1611 | cb->buf_put = cb->buf_buf; | |
1612 | } | |
1613 | ||
1614 | return count; | |
1615 | ||
1616 | } | |
1617 | ||
1618 | ||
1619 | /* | |
1620 | * cypress_buf_get | |
1621 | * | |
1622 | * Get data from the circular buffer and copy to the given buffer. | |
1623 | * Restrict to the amount of data available. | |
1624 | * | |
1625 | * Return the number of bytes copied. | |
1626 | */ | |
1627 | ||
1628 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, | |
1629 | unsigned int count) | |
1630 | { | |
1631 | ||
1632 | unsigned int len; | |
1633 | ||
1634 | ||
1635 | if (cb == NULL) | |
1636 | return 0; | |
1637 | ||
1638 | len = cypress_buf_data_avail(cb); | |
1639 | if (count > len) | |
1640 | count = len; | |
1641 | ||
1642 | if (count == 0) | |
1643 | return 0; | |
1644 | ||
1645 | len = cb->buf_buf + cb->buf_size - cb->buf_get; | |
1646 | if (count > len) { | |
1647 | memcpy(buf, cb->buf_get, len); | |
1648 | memcpy(buf+len, cb->buf_buf, count - len); | |
1649 | cb->buf_get = cb->buf_buf + count - len; | |
1650 | } else { | |
1651 | memcpy(buf, cb->buf_get, count); | |
1652 | if (count < len) | |
1653 | cb->buf_get += count; | |
1654 | else /* count == len */ | |
1655 | cb->buf_get = cb->buf_buf; | |
1656 | } | |
1657 | ||
1658 | return count; | |
1659 | ||
1660 | } | |
1661 | ||
1662 | /***************************************************************************** | |
1663 | * Module functions | |
1664 | *****************************************************************************/ | |
1665 | ||
1666 | static int __init cypress_init(void) | |
1667 | { | |
1668 | int retval; | |
1669 | ||
1670 | dbg("%s", __FUNCTION__); | |
1671 | ||
1672 | retval = usb_serial_register(&cypress_earthmate_device); | |
1673 | if (retval) | |
1674 | goto failed_em_register; | |
1675 | retval = usb_serial_register(&cypress_hidcom_device); | |
1676 | if (retval) | |
1677 | goto failed_hidcom_register; | |
a5c44e29 LM |
1678 | retval = usb_serial_register(&cypress_ca42v2_device); |
1679 | if (retval) | |
1680 | goto failed_ca42v2_register; | |
1da177e4 LT |
1681 | retval = usb_register(&cypress_driver); |
1682 | if (retval) | |
1683 | goto failed_usb_register; | |
1684 | ||
1685 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1686 | return 0; | |
2e46b748 | 1687 | |
1da177e4 | 1688 | failed_usb_register: |
a5c44e29 | 1689 | usb_serial_deregister(&cypress_ca42v2_device); |
2e46b748 | 1690 | failed_ca42v2_register: |
1da177e4 | 1691 | usb_serial_deregister(&cypress_hidcom_device); |
2e46b748 | 1692 | failed_hidcom_register: |
1da177e4 | 1693 | usb_serial_deregister(&cypress_earthmate_device); |
2e46b748 | 1694 | failed_em_register: |
1da177e4 LT |
1695 | return retval; |
1696 | } | |
1697 | ||
1698 | ||
1699 | static void __exit cypress_exit (void) | |
1700 | { | |
1701 | dbg("%s", __FUNCTION__); | |
1702 | ||
1703 | usb_deregister (&cypress_driver); | |
1704 | usb_serial_deregister (&cypress_earthmate_device); | |
1705 | usb_serial_deregister (&cypress_hidcom_device); | |
a5c44e29 | 1706 | usb_serial_deregister (&cypress_ca42v2_device); |
1da177e4 LT |
1707 | } |
1708 | ||
1709 | ||
1710 | module_init(cypress_init); | |
1711 | module_exit(cypress_exit); | |
1712 | ||
1713 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1714 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1715 | MODULE_VERSION( DRIVER_VERSION ); | |
1716 | MODULE_LICENSE("GPL"); | |
1717 | ||
1718 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1719 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1720 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1721 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1722 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1723 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); |