Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * USB Cypress M8 driver | |
3 | * | |
4 | * Copyright (C) 2004 | |
813a224f | 5 | * Lonnie Mendez (dignome@gmail.com) |
1da177e4 LT |
6 | * Copyright (C) 2003,2004 |
7 | * Neil Whelchel (koyama@firstlight.net) | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
813a224f AC |
14 | * See Documentation/usb/usb-serial.txt for more information on using this |
15 | * driver | |
1da177e4 LT |
16 | * |
17 | * See http://geocities.com/i0xox0i for information on this driver and the | |
18 | * earthmate usb device. | |
1da177e4 LT |
19 | */ |
20 | ||
813a224f AC |
21 | /* Thanks to Neil Whelchel for writing the first cypress m8 implementation |
22 | for linux. */ | |
1da177e4 LT |
23 | /* Thanks to cypress for providing references for the hid reports. */ |
24 | /* Thanks to Jiang Zhang for providing links and for general help. */ | |
813a224f | 25 | /* Code originates and was built up from ftdi_sio, belkin, pl2303 and others.*/ |
1da177e4 LT |
26 | |
27 | ||
1da177e4 LT |
28 | #include <linux/kernel.h> |
29 | #include <linux/errno.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/tty.h> | |
33 | #include <linux/tty_driver.h> | |
34 | #include <linux/tty_flip.h> | |
35 | #include <linux/module.h> | |
36 | #include <linux/moduleparam.h> | |
37 | #include <linux/spinlock.h> | |
38 | #include <linux/usb.h> | |
a969888c | 39 | #include <linux/usb/serial.h> |
1da177e4 | 40 | #include <linux/serial.h> |
117fb8d0 | 41 | #include <linux/kfifo.h> |
1da177e4 | 42 | #include <linux/delay.h> |
813a224f | 43 | #include <linux/uaccess.h> |
0f2c2d7b | 44 | #include <asm/unaligned.h> |
1da177e4 | 45 | |
1da177e4 LT |
46 | #include "cypress_m8.h" |
47 | ||
48 | ||
90ab5ee9 RR |
49 | static bool debug; |
50 | static bool stats; | |
3cb4a4f7 | 51 | static int interval; |
90ab5ee9 | 52 | static bool unstable_bauds; |
1da177e4 LT |
53 | |
54 | /* | |
55 | * Version Information | |
56 | */ | |
117fb8d0 | 57 | #define DRIVER_VERSION "v1.10" |
1da177e4 LT |
58 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
59 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
60 | ||
61 | /* write buffer size defines */ | |
62 | #define CYPRESS_BUF_SIZE 1024 | |
1da177e4 | 63 | |
7d40d7e8 | 64 | static const struct usb_device_id id_table_earthmate[] = { |
1da177e4 | 65 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 66 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
67 | { } /* Terminating entry */ |
68 | }; | |
69 | ||
7d40d7e8 | 70 | static const struct usb_device_id id_table_cyphidcomrs232[] = { |
1da177e4 | 71 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 72 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
1da177e4 LT |
73 | { } /* Terminating entry */ |
74 | }; | |
75 | ||
7d40d7e8 | 76 | static const struct usb_device_id id_table_nokiaca42v2[] = { |
a5c44e29 LM |
77 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
78 | { } /* Terminating entry */ | |
79 | }; | |
80 | ||
7d40d7e8 | 81 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 | 82 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 83 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 84 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 85 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
a5c44e29 | 86 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
87 | { } /* Terminating entry */ |
88 | }; | |
89 | ||
813a224f | 90 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
91 | |
92 | static struct usb_driver cypress_driver = { | |
93 | .name = "cypress", | |
94 | .probe = usb_serial_probe, | |
95 | .disconnect = usb_serial_disconnect, | |
96 | .id_table = id_table_combined, | |
97 | }; | |
98 | ||
3416eaa1 MI |
99 | enum packet_format { |
100 | packet_format_1, /* b0:status, b1:payload count */ | |
101 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
102 | }; | |
103 | ||
1da177e4 LT |
104 | struct cypress_private { |
105 | spinlock_t lock; /* private lock */ | |
106 | int chiptype; /* identifier of device, for quirks/etc */ | |
107 | int bytes_in; /* used for statistics */ | |
108 | int bytes_out; /* used for statistics */ | |
109 | int cmd_count; /* used for statistics */ | |
110 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
117fb8d0 | 111 | struct kfifo write_fifo; /* write fifo */ |
1da177e4 | 112 | int write_urb_in_use; /* write urb in use indicator */ |
0257fa9f MI |
113 | int write_urb_interval; /* interval to use for write urb */ |
114 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 115 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
116 | int termios_initialized; |
117 | __u8 line_control; /* holds dtr / rts value */ | |
118 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
119 | __u8 current_config; /* stores the current configuration byte */ | |
120 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 121 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 122 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
123 | int baud_rate; /* stores current baud rate in |
124 | integer form */ | |
1da177e4 LT |
125 | int isthrottled; /* if throttled, discard reads */ |
126 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
127 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
3ad2f3fb | 128 | /* we pass a pointer to this as the argument sent to |
813a224f | 129 | cypress_set_termios old_termios */ |
606d099c | 130 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
131 | }; |
132 | ||
1da177e4 | 133 | /* function prototypes for the Cypress USB to serial device */ |
813a224f AC |
134 | static int cypress_earthmate_startup(struct usb_serial *serial); |
135 | static int cypress_hidcom_startup(struct usb_serial *serial); | |
136 | static int cypress_ca42v2_startup(struct usb_serial *serial); | |
f9c99bb8 | 137 | static void cypress_release(struct usb_serial *serial); |
a509a7e4 | 138 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
139 | static void cypress_close(struct usb_serial_port *port); |
140 | static void cypress_dtr_rts(struct usb_serial_port *port, int on); | |
813a224f AC |
141 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
142 | const unsigned char *buf, int count); | |
143 | static void cypress_send(struct usb_serial_port *port); | |
144 | static int cypress_write_room(struct tty_struct *tty); | |
00a0d0d6 | 145 | static int cypress_ioctl(struct tty_struct *tty, |
813a224f AC |
146 | unsigned int cmd, unsigned long arg); |
147 | static void cypress_set_termios(struct tty_struct *tty, | |
148 | struct usb_serial_port *port, struct ktermios *old); | |
60b33c13 | 149 | static int cypress_tiocmget(struct tty_struct *tty); |
20b9d177 | 150 | static int cypress_tiocmset(struct tty_struct *tty, |
813a224f AC |
151 | unsigned int set, unsigned int clear); |
152 | static int cypress_chars_in_buffer(struct tty_struct *tty); | |
153 | static void cypress_throttle(struct tty_struct *tty); | |
154 | static void cypress_unthrottle(struct tty_struct *tty); | |
155 | static void cypress_set_dead(struct usb_serial_port *port); | |
156 | static void cypress_read_int_callback(struct urb *urb); | |
157 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 | 158 | |
ea65370d | 159 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
160 | .driver = { |
161 | .owner = THIS_MODULE, | |
269bda1c | 162 | .name = "earthmate", |
18fcac35 | 163 | }, |
269bda1c | 164 | .description = "DeLorme Earthmate USB", |
1da177e4 | 165 | .id_table = id_table_earthmate, |
1da177e4 LT |
166 | .num_ports = 1, |
167 | .attach = cypress_earthmate_startup, | |
f9c99bb8 | 168 | .release = cypress_release, |
1da177e4 LT |
169 | .open = cypress_open, |
170 | .close = cypress_close, | |
335f8514 | 171 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
172 | .write = cypress_write, |
173 | .write_room = cypress_write_room, | |
174 | .ioctl = cypress_ioctl, | |
175 | .set_termios = cypress_set_termios, | |
176 | .tiocmget = cypress_tiocmget, | |
177 | .tiocmset = cypress_tiocmset, | |
178 | .chars_in_buffer = cypress_chars_in_buffer, | |
179 | .throttle = cypress_throttle, | |
180 | .unthrottle = cypress_unthrottle, | |
181 | .read_int_callback = cypress_read_int_callback, | |
182 | .write_int_callback = cypress_write_int_callback, | |
183 | }; | |
184 | ||
ea65370d | 185 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
186 | .driver = { |
187 | .owner = THIS_MODULE, | |
269bda1c | 188 | .name = "cyphidcom", |
18fcac35 | 189 | }, |
269bda1c | 190 | .description = "HID->COM RS232 Adapter", |
1da177e4 | 191 | .id_table = id_table_cyphidcomrs232, |
1da177e4 LT |
192 | .num_ports = 1, |
193 | .attach = cypress_hidcom_startup, | |
f9c99bb8 | 194 | .release = cypress_release, |
1da177e4 LT |
195 | .open = cypress_open, |
196 | .close = cypress_close, | |
335f8514 | 197 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
198 | .write = cypress_write, |
199 | .write_room = cypress_write_room, | |
200 | .ioctl = cypress_ioctl, | |
201 | .set_termios = cypress_set_termios, | |
202 | .tiocmget = cypress_tiocmget, | |
203 | .tiocmset = cypress_tiocmset, | |
204 | .chars_in_buffer = cypress_chars_in_buffer, | |
205 | .throttle = cypress_throttle, | |
206 | .unthrottle = cypress_unthrottle, | |
207 | .read_int_callback = cypress_read_int_callback, | |
208 | .write_int_callback = cypress_write_int_callback, | |
209 | }; | |
210 | ||
a5c44e29 LM |
211 | static struct usb_serial_driver cypress_ca42v2_device = { |
212 | .driver = { | |
213 | .owner = THIS_MODULE, | |
813a224f | 214 | .name = "nokiaca42v2", |
a5c44e29 LM |
215 | }, |
216 | .description = "Nokia CA-42 V2 Adapter", | |
217 | .id_table = id_table_nokiaca42v2, | |
a5c44e29 LM |
218 | .num_ports = 1, |
219 | .attach = cypress_ca42v2_startup, | |
f9c99bb8 | 220 | .release = cypress_release, |
a5c44e29 LM |
221 | .open = cypress_open, |
222 | .close = cypress_close, | |
335f8514 | 223 | .dtr_rts = cypress_dtr_rts, |
a5c44e29 LM |
224 | .write = cypress_write, |
225 | .write_room = cypress_write_room, | |
226 | .ioctl = cypress_ioctl, | |
227 | .set_termios = cypress_set_termios, | |
228 | .tiocmget = cypress_tiocmget, | |
229 | .tiocmset = cypress_tiocmset, | |
230 | .chars_in_buffer = cypress_chars_in_buffer, | |
231 | .throttle = cypress_throttle, | |
232 | .unthrottle = cypress_unthrottle, | |
233 | .read_int_callback = cypress_read_int_callback, | |
234 | .write_int_callback = cypress_write_int_callback, | |
235 | }; | |
1da177e4 | 236 | |
08a4f6bc AS |
237 | static struct usb_serial_driver * const serial_drivers[] = { |
238 | &cypress_earthmate_device, &cypress_hidcom_device, | |
239 | &cypress_ca42v2_device, NULL | |
240 | }; | |
241 | ||
1da177e4 LT |
242 | /***************************************************************************** |
243 | * Cypress serial helper functions | |
244 | *****************************************************************************/ | |
245 | ||
246 | ||
8873aaa6 | 247 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 248 | { |
92983c21 MI |
249 | struct cypress_private *priv; |
250 | priv = usb_get_serial_port_data(port); | |
251 | ||
c312659c MF |
252 | if (unstable_bauds) |
253 | return new_rate; | |
254 | ||
92983c21 MI |
255 | /* |
256 | * The general purpose firmware for the Cypress M8 allows for | |
257 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
258 | * chose to use the general purpose firmware or not), if you | |
259 | * need to modify this speed setting for your own project | |
260 | * please add your own chiptype and modify the code likewise. | |
261 | * The Cypress HID->COM device will work successfully up to | |
262 | * 115200bps (but the actual throughput is around 3kBps). | |
263 | */ | |
92983c21 MI |
264 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
265 | /* | |
266 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
267 | * Cypress app note that describes this mechanism | |
268 | * states the the low-speed part can't handle more | |
269 | * than 800 bytes/sec, in which case 4800 baud is the | |
270 | * safest speed for a part like that. | |
271 | */ | |
272 | if (new_rate > 4800) { | |
273 | dbg("%s - failed setting baud rate, device incapable " | |
274 | "speed %d", __func__, new_rate); | |
275 | return -1; | |
276 | } | |
277 | } | |
278 | switch (priv->chiptype) { | |
279 | case CT_EARTHMATE: | |
280 | if (new_rate <= 600) { | |
281 | /* 300 and 600 baud rates are supported under | |
282 | * the generic firmware, but are not used with | |
283 | * NMEA and SiRF protocols */ | |
284 | dbg("%s - failed setting baud rate, unsupported speed " | |
285 | "of %d on Earthmate GPS", __func__, new_rate); | |
286 | return -1; | |
287 | } | |
288 | break; | |
289 | default: | |
290 | break; | |
291 | } | |
292 | return new_rate; | |
293 | } | |
294 | ||
295 | ||
093cf723 | 296 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 297 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
298 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
299 | int stop_bits, int parity_enable, int parity_type, int reset, | |
300 | int cypress_request_type) | |
1da177e4 | 301 | { |
3cb4a4f7 | 302 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 303 | struct cypress_private *priv; |
0954644b JH |
304 | u8 *feature_buffer; |
305 | const unsigned int feature_len = 5; | |
1da177e4 LT |
306 | unsigned long flags; |
307 | ||
441b62c1 | 308 | dbg("%s", __func__); |
813a224f | 309 | |
1da177e4 LT |
310 | priv = usb_get_serial_port_data(port); |
311 | ||
78aef519 MI |
312 | if (!priv->comm_is_ok) |
313 | return -ENODEV; | |
314 | ||
0954644b JH |
315 | feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL); |
316 | if (!feature_buffer) | |
317 | return -ENOMEM; | |
318 | ||
813a224f AC |
319 | switch (cypress_request_type) { |
320 | case CYPRESS_SET_CONFIG: | |
813a224f | 321 | /* 0 means 'Hang up' so doesn't change the true bit rate */ |
2805eb13 MF |
322 | new_baudrate = priv->baud_rate; |
323 | if (baud_rate && baud_rate != priv->baud_rate) { | |
813a224f AC |
324 | dbg("%s - baud rate is changing", __func__); |
325 | retval = analyze_baud_rate(port, baud_rate); | |
2805eb13 | 326 | if (retval >= 0) { |
813a224f AC |
327 | new_baudrate = retval; |
328 | dbg("%s - New baud rate set to %d", | |
329 | __func__, new_baudrate); | |
1da177e4 | 330 | } |
813a224f AC |
331 | } |
332 | dbg("%s - baud rate is being sent as %d", | |
333 | __func__, new_baudrate); | |
334 | ||
813a224f | 335 | /* fill the feature_buffer with new configuration */ |
0f2c2d7b | 336 | put_unaligned_le32(new_baudrate, feature_buffer); |
813a224f AC |
337 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
338 | /* 1 bit gap */ | |
339 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
340 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
341 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
342 | /* 1 bit gap */ | |
343 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
344 | ||
345 | dbg("%s - device is being sent this feature report:", | |
346 | __func__); | |
347 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __func__, | |
348 | feature_buffer[0], feature_buffer[1], | |
349 | feature_buffer[2], feature_buffer[3], | |
350 | feature_buffer[4]); | |
351 | ||
352 | do { | |
353 | retval = usb_control_msg(port->serial->dev, | |
354 | usb_sndctrlpipe(port->serial->dev, 0), | |
355 | HID_REQ_SET_REPORT, | |
356 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
357 | 0x0300, 0, feature_buffer, | |
0954644b | 358 | feature_len, 500); |
813a224f AC |
359 | |
360 | if (tries++ >= 3) | |
361 | break; | |
362 | ||
0954644b | 363 | } while (retval != feature_len && |
813a224f AC |
364 | retval != -ENODEV); |
365 | ||
0954644b | 366 | if (retval != feature_len) { |
194343d9 GKH |
367 | dev_err(&port->dev, "%s - failed sending serial " |
368 | "line settings - %d\n", __func__, retval); | |
813a224f AC |
369 | cypress_set_dead(port); |
370 | } else { | |
371 | spin_lock_irqsave(&priv->lock, flags); | |
372 | priv->baud_rate = new_baudrate; | |
373 | priv->current_config = feature_buffer[4]; | |
374 | spin_unlock_irqrestore(&priv->lock, flags); | |
375 | /* If we asked for a speed change encode it */ | |
376 | if (baud_rate) | |
377 | tty_encode_baud_rate(tty, | |
378 | new_baudrate, new_baudrate); | |
379 | } | |
380 | break; | |
381 | case CYPRESS_GET_CONFIG: | |
382 | if (priv->get_cfg_unsafe) { | |
383 | /* Not implemented for this device, | |
384 | and if we try to do it we're likely | |
385 | to crash the hardware. */ | |
0954644b JH |
386 | retval = -ENOTTY; |
387 | goto out; | |
813a224f AC |
388 | } |
389 | dbg("%s - retreiving serial line settings", __func__); | |
813a224f AC |
390 | do { |
391 | retval = usb_control_msg(port->serial->dev, | |
392 | usb_rcvctrlpipe(port->serial->dev, 0), | |
393 | HID_REQ_GET_REPORT, | |
394 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
395 | 0x0300, 0, feature_buffer, | |
0954644b | 396 | feature_len, 500); |
813a224f AC |
397 | |
398 | if (tries++ >= 3) | |
399 | break; | |
0954644b | 400 | } while (retval != feature_len |
813a224f AC |
401 | && retval != -ENODEV); |
402 | ||
0954644b | 403 | if (retval != feature_len) { |
194343d9 GKH |
404 | dev_err(&port->dev, "%s - failed to retrieve serial " |
405 | "line settings - %d\n", __func__, retval); | |
813a224f | 406 | cypress_set_dead(port); |
0954644b | 407 | goto out; |
813a224f AC |
408 | } else { |
409 | spin_lock_irqsave(&priv->lock, flags); | |
410 | /* store the config in one byte, and later | |
411 | use bit masks to check values */ | |
412 | priv->current_config = feature_buffer[4]; | |
0f2c2d7b | 413 | priv->baud_rate = get_unaligned_le32(feature_buffer); |
813a224f AC |
414 | spin_unlock_irqrestore(&priv->lock, flags); |
415 | } | |
1da177e4 | 416 | } |
3cb4a4f7 LM |
417 | spin_lock_irqsave(&priv->lock, flags); |
418 | ++priv->cmd_count; | |
419 | spin_unlock_irqrestore(&priv->lock, flags); | |
0954644b JH |
420 | out: |
421 | kfree(feature_buffer); | |
1da177e4 LT |
422 | return retval; |
423 | } /* cypress_serial_control */ | |
424 | ||
425 | ||
78aef519 MI |
426 | static void cypress_set_dead(struct usb_serial_port *port) |
427 | { | |
428 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
429 | unsigned long flags; | |
430 | ||
431 | spin_lock_irqsave(&priv->lock, flags); | |
432 | if (!priv->comm_is_ok) { | |
433 | spin_unlock_irqrestore(&priv->lock, flags); | |
434 | return; | |
435 | } | |
436 | priv->comm_is_ok = 0; | |
437 | spin_unlock_irqrestore(&priv->lock, flags); | |
438 | ||
194343d9 GKH |
439 | dev_err(&port->dev, "cypress_m8 suspending failing port %d - " |
440 | "interval might be too short\n", port->number); | |
78aef519 MI |
441 | } |
442 | ||
443 | ||
1da177e4 LT |
444 | /***************************************************************************** |
445 | * Cypress serial driver functions | |
446 | *****************************************************************************/ | |
447 | ||
448 | ||
813a224f | 449 | static int generic_startup(struct usb_serial *serial) |
1da177e4 LT |
450 | { |
451 | struct cypress_private *priv; | |
0257fa9f | 452 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 453 | |
441b62c1 | 454 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 455 | |
813a224f | 456 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
457 | if (!priv) |
458 | return -ENOMEM; | |
459 | ||
78aef519 | 460 | priv->comm_is_ok = !0; |
1da177e4 | 461 | spin_lock_init(&priv->lock); |
117fb8d0 | 462 | if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) { |
1da177e4 LT |
463 | kfree(priv); |
464 | return -ENOMEM; | |
465 | } | |
466 | init_waitqueue_head(&priv->delta_msr_wait); | |
813a224f AC |
467 | |
468 | usb_reset_configuration(serial->dev); | |
469 | ||
1da177e4 LT |
470 | priv->cmd_ctrl = 0; |
471 | priv->line_control = 0; | |
472 | priv->termios_initialized = 0; | |
1da177e4 | 473 | priv->rx_flags = 0; |
3416eaa1 MI |
474 | /* Default packet format setting is determined by packet size. |
475 | Anything with a size larger then 9 must have a separate | |
476 | count field since the 3 bit count field is otherwise too | |
477 | small. Otherwise we can use the slightly more compact | |
478 | format. This is in accordance with the cypress_m8 serial | |
479 | converter app note. */ | |
813a224f | 480 | if (port->interrupt_out_size > 9) |
3416eaa1 | 481 | priv->pkt_fmt = packet_format_1; |
813a224f | 482 | else |
3416eaa1 | 483 | priv->pkt_fmt = packet_format_2; |
813a224f | 484 | |
0257fa9f MI |
485 | if (interval > 0) { |
486 | priv->write_urb_interval = interval; | |
487 | priv->read_urb_interval = interval; | |
488 | dbg("%s - port %d read & write intervals forced to %d", | |
813a224f | 489 | __func__, port->number, interval); |
0257fa9f MI |
490 | } else { |
491 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
492 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
493 | dbg("%s - port %d intervals: read=%d write=%d", | |
813a224f AC |
494 | __func__, port->number, |
495 | priv->read_urb_interval, priv->write_urb_interval); | |
0257fa9f MI |
496 | } |
497 | usb_set_serial_port_data(port, priv); | |
813a224f | 498 | |
b9db07fb LM |
499 | return 0; |
500 | } | |
1da177e4 LT |
501 | |
502 | ||
813a224f | 503 | static int cypress_earthmate_startup(struct usb_serial *serial) |
1da177e4 LT |
504 | { |
505 | struct cypress_private *priv; | |
3d6aa320 | 506 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 507 | |
441b62c1 | 508 | dbg("%s", __func__); |
1da177e4 LT |
509 | |
510 | if (generic_startup(serial)) { | |
441b62c1 | 511 | dbg("%s - Failed setting up port %d", __func__, |
3d6aa320 | 512 | port->number); |
1da177e4 LT |
513 | return 1; |
514 | } | |
515 | ||
3d6aa320 | 516 | priv = usb_get_serial_port_data(port); |
1da177e4 | 517 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
518 | /* All Earthmate devices use the separated-count packet |
519 | format! Idiotic. */ | |
520 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
521 | if (serial->dev->descriptor.idProduct != |
522 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
523 | /* The old original USB Earthmate seemed able to |
524 | handle GET_CONFIG requests; everything they've | |
525 | produced since that time crashes if this command is | |
526 | attempted :-( */ | |
527 | dbg("%s - Marking this device as unsafe for GET_CONFIG " | |
528 | "commands", __func__); | |
529 | priv->get_cfg_unsafe = !0; | |
530 | } | |
b9db07fb LM |
531 | |
532 | return 0; | |
1da177e4 LT |
533 | } /* cypress_earthmate_startup */ |
534 | ||
535 | ||
813a224f | 536 | static int cypress_hidcom_startup(struct usb_serial *serial) |
1da177e4 LT |
537 | { |
538 | struct cypress_private *priv; | |
539 | ||
441b62c1 | 540 | dbg("%s", __func__); |
1da177e4 LT |
541 | |
542 | if (generic_startup(serial)) { | |
441b62c1 | 543 | dbg("%s - Failed setting up port %d", __func__, |
b9db07fb | 544 | serial->port[0]->number); |
1da177e4 LT |
545 | return 1; |
546 | } | |
547 | ||
548 | priv = usb_get_serial_port_data(serial->port[0]); | |
549 | priv->chiptype = CT_CYPHIDCOM; | |
813a224f | 550 | |
b9db07fb | 551 | return 0; |
1da177e4 LT |
552 | } /* cypress_hidcom_startup */ |
553 | ||
554 | ||
813a224f | 555 | static int cypress_ca42v2_startup(struct usb_serial *serial) |
a5c44e29 LM |
556 | { |
557 | struct cypress_private *priv; | |
558 | ||
441b62c1 | 559 | dbg("%s", __func__); |
a5c44e29 LM |
560 | |
561 | if (generic_startup(serial)) { | |
441b62c1 | 562 | dbg("%s - Failed setting up port %d", __func__, |
a5c44e29 LM |
563 | serial->port[0]->number); |
564 | return 1; | |
565 | } | |
566 | ||
567 | priv = usb_get_serial_port_data(serial->port[0]); | |
568 | priv->chiptype = CT_CA42V2; | |
569 | ||
570 | return 0; | |
571 | } /* cypress_ca42v2_startup */ | |
572 | ||
573 | ||
f9c99bb8 | 574 | static void cypress_release(struct usb_serial *serial) |
1da177e4 LT |
575 | { |
576 | struct cypress_private *priv; | |
577 | ||
813a224f | 578 | dbg("%s - port %d", __func__, serial->port[0]->number); |
1da177e4 LT |
579 | |
580 | /* all open ports are closed at this point */ | |
581 | ||
582 | priv = usb_get_serial_port_data(serial->port[0]); | |
583 | ||
584 | if (priv) { | |
117fb8d0 | 585 | kfifo_free(&priv->write_fifo); |
1da177e4 | 586 | kfree(priv); |
1da177e4 LT |
587 | } |
588 | } | |
589 | ||
590 | ||
a509a7e4 | 591 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
592 | { |
593 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
594 | struct usb_serial *serial = port->serial; | |
595 | unsigned long flags; | |
596 | int result = 0; | |
597 | ||
441b62c1 | 598 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 599 | |
78aef519 MI |
600 | if (!priv->comm_is_ok) |
601 | return -EIO; | |
602 | ||
1da177e4 | 603 | /* clear halts before open */ |
1da177e4 LT |
604 | usb_clear_halt(serial->dev, 0x81); |
605 | usb_clear_halt(serial->dev, 0x02); | |
606 | ||
607 | spin_lock_irqsave(&priv->lock, flags); | |
608 | /* reset read/write statistics */ | |
609 | priv->bytes_in = 0; | |
610 | priv->bytes_out = 0; | |
611 | priv->cmd_count = 0; | |
612 | priv->rx_flags = 0; | |
613 | spin_unlock_irqrestore(&priv->lock, flags); | |
614 | ||
335f8514 | 615 | /* Set termios */ |
fe1ae7fd | 616 | cypress_send(port); |
1da177e4 | 617 | |
95da310e AC |
618 | if (tty) |
619 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
620 | |
621 | /* setup the port and start reading from the device */ | |
813a224f | 622 | if (!port->interrupt_in_urb) { |
194343d9 GKH |
623 | dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n", |
624 | __func__); | |
813a224f | 625 | return -1; |
1da177e4 LT |
626 | } |
627 | ||
628 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
629 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
630 | port->interrupt_in_urb->transfer_buffer, |
631 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 632 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
633 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
634 | ||
813a224f AC |
635 | if (result) { |
636 | dev_err(&port->dev, | |
637 | "%s - failed submitting read urb, error %d\n", | |
638 | __func__, result); | |
78aef519 | 639 | cypress_set_dead(port); |
1da177e4 | 640 | } |
335f8514 | 641 | port->port.drain_delay = 256; |
1da177e4 LT |
642 | return result; |
643 | } /* cypress_open */ | |
644 | ||
335f8514 AC |
645 | static void cypress_dtr_rts(struct usb_serial_port *port, int on) |
646 | { | |
647 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
648 | /* drop dtr and rts */ | |
335f8514 AC |
649 | spin_lock_irq(&priv->lock); |
650 | if (on == 0) | |
651 | priv->line_control = 0; | |
652 | else | |
653 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
654 | priv->cmd_ctrl = 1; | |
655 | spin_unlock_irq(&priv->lock); | |
656 | cypress_write(NULL, port, NULL, 0); | |
657 | } | |
1da177e4 | 658 | |
335f8514 | 659 | static void cypress_close(struct usb_serial_port *port) |
1da177e4 LT |
660 | { |
661 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
117fb8d0 | 662 | unsigned long flags; |
1da177e4 | 663 | |
441b62c1 | 664 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 665 | |
9e3b1d8e ON |
666 | /* writing is potentially harmful, lock must be taken */ |
667 | mutex_lock(&port->serial->disc_mutex); | |
668 | if (port->serial->disconnected) { | |
669 | mutex_unlock(&port->serial->disc_mutex); | |
670 | return; | |
671 | } | |
117fb8d0 JH |
672 | spin_lock_irqsave(&priv->lock, flags); |
673 | kfifo_reset_out(&priv->write_fifo); | |
674 | spin_unlock_irqrestore(&priv->lock, flags); | |
675 | ||
441b62c1 | 676 | dbg("%s - stopping urbs", __func__); |
813a224f AC |
677 | usb_kill_urb(port->interrupt_in_urb); |
678 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 679 | |
1da177e4 | 680 | if (stats) |
813a224f AC |
681 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
682 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
9e3b1d8e | 683 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
684 | } /* cypress_close */ |
685 | ||
686 | ||
95da310e AC |
687 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
688 | const unsigned char *buf, int count) | |
1da177e4 LT |
689 | { |
690 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
813a224f | 691 | |
441b62c1 | 692 | dbg("%s - port %d, %d bytes", __func__, port->number, count); |
1da177e4 LT |
693 | |
694 | /* line control commands, which need to be executed immediately, | |
695 | are not put into the buffer for obvious reasons. | |
696 | */ | |
697 | if (priv->cmd_ctrl) { | |
698 | count = 0; | |
699 | goto finish; | |
700 | } | |
813a224f | 701 | |
1da177e4 LT |
702 | if (!count) |
703 | return count; | |
813a224f | 704 | |
117fb8d0 | 705 | count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock); |
1da177e4 LT |
706 | |
707 | finish: | |
708 | cypress_send(port); | |
709 | ||
710 | return count; | |
711 | } /* cypress_write */ | |
712 | ||
713 | ||
714 | static void cypress_send(struct usb_serial_port *port) | |
715 | { | |
716 | int count = 0, result, offset, actual_size; | |
717 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
718 | unsigned long flags; | |
813a224f | 719 | |
78aef519 MI |
720 | if (!priv->comm_is_ok) |
721 | return; | |
722 | ||
441b62c1 | 723 | dbg("%s - port %d", __func__, port->number); |
813a224f AC |
724 | dbg("%s - interrupt out size is %d", __func__, |
725 | port->interrupt_out_size); | |
726 | ||
1da177e4 LT |
727 | spin_lock_irqsave(&priv->lock, flags); |
728 | if (priv->write_urb_in_use) { | |
441b62c1 | 729 | dbg("%s - can't write, urb in use", __func__); |
1da177e4 LT |
730 | spin_unlock_irqrestore(&priv->lock, flags); |
731 | return; | |
732 | } | |
733 | spin_unlock_irqrestore(&priv->lock, flags); | |
734 | ||
735 | /* clear buffer */ | |
813a224f AC |
736 | memset(port->interrupt_out_urb->transfer_buffer, 0, |
737 | port->interrupt_out_size); | |
1da177e4 LT |
738 | |
739 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
740 | switch (priv->pkt_fmt) { |
741 | default: | |
742 | case packet_format_1: | |
743 | /* this is for the CY7C64013... */ | |
744 | offset = 2; | |
745 | port->interrupt_out_buffer[0] = priv->line_control; | |
746 | break; | |
747 | case packet_format_2: | |
748 | /* this is for the CY7C63743... */ | |
749 | offset = 1; | |
750 | port->interrupt_out_buffer[0] = priv->line_control; | |
751 | break; | |
1da177e4 LT |
752 | } |
753 | ||
754 | if (priv->line_control & CONTROL_RESET) | |
755 | priv->line_control &= ~CONTROL_RESET; | |
756 | ||
757 | if (priv->cmd_ctrl) { | |
758 | priv->cmd_count++; | |
441b62c1 | 759 | dbg("%s - line control command being issued", __func__); |
1da177e4 LT |
760 | spin_unlock_irqrestore(&priv->lock, flags); |
761 | goto send; | |
762 | } else | |
763 | spin_unlock_irqrestore(&priv->lock, flags); | |
764 | ||
117fb8d0 JH |
765 | count = kfifo_out_locked(&priv->write_fifo, |
766 | &port->interrupt_out_buffer[offset], | |
767 | port->interrupt_out_size - offset, | |
768 | &priv->lock); | |
813a224f | 769 | if (count == 0) |
1da177e4 | 770 | return; |
1da177e4 | 771 | |
3416eaa1 MI |
772 | switch (priv->pkt_fmt) { |
773 | default: | |
774 | case packet_format_1: | |
775 | port->interrupt_out_buffer[1] = count; | |
776 | break; | |
777 | case packet_format_2: | |
778 | port->interrupt_out_buffer[0] |= count; | |
1da177e4 LT |
779 | } |
780 | ||
441b62c1 | 781 | dbg("%s - count is %d", __func__, count); |
1da177e4 LT |
782 | |
783 | send: | |
784 | spin_lock_irqsave(&priv->lock, flags); | |
785 | priv->write_urb_in_use = 1; | |
786 | spin_unlock_irqrestore(&priv->lock, flags); | |
787 | ||
788 | if (priv->cmd_ctrl) | |
789 | actual_size = 1; | |
790 | else | |
3416eaa1 MI |
791 | actual_size = count + |
792 | (priv->pkt_fmt == packet_format_1 ? 2 : 1); | |
793 | ||
813a224f AC |
794 | usb_serial_debug_data(debug, &port->dev, __func__, |
795 | port->interrupt_out_size, | |
796 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 797 | |
9aa8dae7 MI |
798 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
799 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
800 | port->interrupt_out_buffer, port->interrupt_out_size, | |
801 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 802 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 803 | if (result) { |
22a416c4 | 804 | dev_err_console(port, |
813a224f AC |
805 | "%s - failed submitting write urb, error %d\n", |
806 | __func__, result); | |
1da177e4 | 807 | priv->write_urb_in_use = 0; |
78aef519 | 808 | cypress_set_dead(port); |
1da177e4 LT |
809 | } |
810 | ||
811 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 812 | if (priv->cmd_ctrl) |
1da177e4 | 813 | priv->cmd_ctrl = 0; |
813a224f AC |
814 | |
815 | /* do not count the line control and size bytes */ | |
816 | priv->bytes_out += count; | |
1da177e4 LT |
817 | spin_unlock_irqrestore(&priv->lock, flags); |
818 | ||
cf2c7481 | 819 | usb_serial_port_softint(port); |
1da177e4 LT |
820 | } /* cypress_send */ |
821 | ||
822 | ||
823 | /* returns how much space is available in the soft buffer */ | |
95da310e | 824 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 825 | { |
95da310e | 826 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
827 | struct cypress_private *priv = usb_get_serial_port_data(port); |
828 | int room = 0; | |
829 | unsigned long flags; | |
830 | ||
441b62c1 | 831 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
832 | |
833 | spin_lock_irqsave(&priv->lock, flags); | |
117fb8d0 | 834 | room = kfifo_avail(&priv->write_fifo); |
1da177e4 LT |
835 | spin_unlock_irqrestore(&priv->lock, flags); |
836 | ||
441b62c1 | 837 | dbg("%s - returns %d", __func__, room); |
1da177e4 LT |
838 | return room; |
839 | } | |
840 | ||
841 | ||
60b33c13 | 842 | static int cypress_tiocmget(struct tty_struct *tty) |
1da177e4 | 843 | { |
95da310e | 844 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
845 | struct cypress_private *priv = usb_get_serial_port_data(port); |
846 | __u8 status, control; | |
847 | unsigned int result = 0; | |
848 | unsigned long flags; | |
813a224f | 849 | |
441b62c1 | 850 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
851 | |
852 | spin_lock_irqsave(&priv->lock, flags); | |
853 | control = priv->line_control; | |
854 | status = priv->current_status; | |
855 | spin_unlock_irqrestore(&priv->lock, flags); | |
856 | ||
857 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
858 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
859 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
860 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
861 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
862 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
863 | ||
441b62c1 | 864 | dbg("%s - result = %x", __func__, result); |
1da177e4 LT |
865 | |
866 | return result; | |
867 | } | |
868 | ||
869 | ||
20b9d177 | 870 | static int cypress_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
871 | unsigned int set, unsigned int clear) |
872 | { | |
95da310e | 873 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
874 | struct cypress_private *priv = usb_get_serial_port_data(port); |
875 | unsigned long flags; | |
813a224f | 876 | |
441b62c1 | 877 | dbg("%s - port %d", __func__, port->number); |
1da177e4 LT |
878 | |
879 | spin_lock_irqsave(&priv->lock, flags); | |
880 | if (set & TIOCM_RTS) | |
881 | priv->line_control |= CONTROL_RTS; | |
882 | if (set & TIOCM_DTR) | |
883 | priv->line_control |= CONTROL_DTR; | |
884 | if (clear & TIOCM_RTS) | |
885 | priv->line_control &= ~CONTROL_RTS; | |
886 | if (clear & TIOCM_DTR) | |
887 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 888 | priv->cmd_ctrl = 1; |
1da177e4 LT |
889 | spin_unlock_irqrestore(&priv->lock, flags); |
890 | ||
95da310e | 891 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
892 | } |
893 | ||
894 | ||
00a0d0d6 | 895 | static int cypress_ioctl(struct tty_struct *tty, |
95da310e | 896 | unsigned int cmd, unsigned long arg) |
1da177e4 | 897 | { |
95da310e | 898 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
899 | struct cypress_private *priv = usb_get_serial_port_data(port); |
900 | ||
441b62c1 | 901 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 LT |
902 | |
903 | switch (cmd) { | |
813a224f AC |
904 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ |
905 | case TIOCMIWAIT: | |
906 | while (priv != NULL) { | |
907 | interruptible_sleep_on(&priv->delta_msr_wait); | |
908 | /* see if a signal did it */ | |
909 | if (signal_pending(current)) | |
910 | return -ERESTARTSYS; | |
911 | else { | |
912 | char diff = priv->diff_status; | |
913 | if (diff == 0) | |
914 | return -EIO; /* no change => error */ | |
915 | ||
916 | /* consume all events */ | |
917 | priv->diff_status = 0; | |
918 | ||
919 | /* return 0 if caller wanted to know about | |
920 | these bits */ | |
921 | if (((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
922 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
923 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
924 | ((arg & TIOCM_CTS) && (diff & UART_CTS))) | |
925 | return 0; | |
926 | /* otherwise caller can't care less about what | |
927 | * happened, and so we continue to wait for | |
928 | * more events. | |
929 | */ | |
1da177e4 | 930 | } |
813a224f AC |
931 | } |
932 | return 0; | |
933 | default: | |
934 | break; | |
1da177e4 | 935 | } |
441b62c1 | 936 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __func__, cmd); |
1da177e4 LT |
937 | return -ENOIOCTLCMD; |
938 | } /* cypress_ioctl */ | |
939 | ||
940 | ||
95da310e AC |
941 | static void cypress_set_termios(struct tty_struct *tty, |
942 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
943 | { |
944 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
1da177e4 | 945 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 946 | unsigned cflag, iflag; |
1da177e4 LT |
947 | unsigned long flags; |
948 | __u8 oldlines; | |
3cb4a4f7 | 949 | int linechange = 0; |
b9db07fb | 950 | |
441b62c1 | 951 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 952 | |
1da177e4 | 953 | spin_lock_irqsave(&priv->lock, flags); |
fe1ae7fd AC |
954 | /* We can't clean this one up as we don't know the device type |
955 | early enough */ | |
1da177e4 LT |
956 | if (!priv->termios_initialized) { |
957 | if (priv->chiptype == CT_EARTHMATE) { | |
958 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
959 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
960 | CLOCAL; | |
8873aaa6 AC |
961 | tty->termios->c_ispeed = 4800; |
962 | tty->termios->c_ospeed = 4800; | |
1da177e4 LT |
963 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
964 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
965 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
966 | CLOCAL; | |
8873aaa6 AC |
967 | tty->termios->c_ispeed = 9600; |
968 | tty->termios->c_ospeed = 9600; | |
a5c44e29 LM |
969 | } else if (priv->chiptype == CT_CA42V2) { |
970 | *(tty->termios) = tty_std_termios; | |
971 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
972 | CLOCAL; | |
8873aaa6 AC |
973 | tty->termios->c_ispeed = 9600; |
974 | tty->termios->c_ospeed = 9600; | |
1da177e4 LT |
975 | } |
976 | priv->termios_initialized = 1; | |
977 | } | |
978 | spin_unlock_irqrestore(&priv->lock, flags); | |
979 | ||
8873aaa6 AC |
980 | /* Unsupported features need clearing */ |
981 | tty->termios->c_cflag &= ~(CMSPAR|CRTSCTS); | |
982 | ||
1da177e4 LT |
983 | cflag = tty->termios->c_cflag; |
984 | iflag = tty->termios->c_iflag; | |
985 | ||
986 | /* check if there are new settings */ | |
987 | if (old_termios) { | |
8873aaa6 AC |
988 | spin_lock_irqsave(&priv->lock, flags); |
989 | priv->tmp_termios = *(tty->termios); | |
990 | spin_unlock_irqrestore(&priv->lock, flags); | |
991 | } | |
1da177e4 LT |
992 | |
993 | /* set number of data bits, parity, stop bits */ | |
994 | /* when parity is disabled the parity type bit is ignored */ | |
995 | ||
b9db07fb LM |
996 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
997 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
998 | ||
1da177e4 LT |
999 | if (cflag & PARENB) { |
1000 | parity_enable = 1; | |
b9db07fb LM |
1001 | /* 1 means odd parity, 0 means even parity */ |
1002 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
1003 | } else |
1004 | parity_enable = parity_type = 0; | |
1005 | ||
77336828 AC |
1006 | switch (cflag & CSIZE) { |
1007 | case CS5: | |
1008 | data_bits = 0; | |
1009 | break; | |
1010 | case CS6: | |
1011 | data_bits = 1; | |
1012 | break; | |
1013 | case CS7: | |
1014 | data_bits = 2; | |
1015 | break; | |
1016 | case CS8: | |
1da177e4 | 1017 | data_bits = 3; |
77336828 AC |
1018 | break; |
1019 | default: | |
194343d9 GKH |
1020 | dev_err(&port->dev, "%s - CSIZE was set, but not CS5-CS8\n", |
1021 | __func__); | |
77336828 AC |
1022 | data_bits = 3; |
1023 | } | |
1da177e4 LT |
1024 | spin_lock_irqsave(&priv->lock, flags); |
1025 | oldlines = priv->line_control; | |
1026 | if ((cflag & CBAUD) == B0) { | |
1027 | /* drop dtr and rts */ | |
441b62c1 | 1028 | dbg("%s - dropping the lines, baud rate 0bps", __func__); |
1da177e4 | 1029 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 1030 | } else |
3cb4a4f7 | 1031 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 1032 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1033 | |
b9db07fb | 1034 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, " |
441b62c1 | 1035 | "%d data_bits (+5)", __func__, stop_bits, |
b9db07fb LM |
1036 | parity_enable, parity_type, data_bits); |
1037 | ||
813a224f AC |
1038 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
1039 | data_bits, stop_bits, | |
1040 | parity_enable, parity_type, | |
1041 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1042 | |
b9db07fb LM |
1043 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1044 | * filled into the private structure this should confirm that all is | |
1045 | * working if it returns what we just set */ | |
95da310e | 1046 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 1047 | |
b9db07fb LM |
1048 | /* Here we can define custom tty settings for devices; the main tty |
1049 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1050 | |
b9db07fb | 1051 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 1052 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
b9db07fb LM |
1053 | dbg("Using custom termios settings for a baud rate of " |
1054 | "4800bps."); | |
1da177e4 LT |
1055 | /* define custom termios settings for NMEA protocol */ |
1056 | ||
1da177e4 | 1057 | tty->termios->c_iflag /* input modes - */ |
b9db07fb LM |
1058 | &= ~(IGNBRK /* disable ignore break */ |
1059 | | BRKINT /* disable break causes interrupt */ | |
1060 | | PARMRK /* disable mark parity errors */ | |
1061 | | ISTRIP /* disable clear high bit of input char */ | |
1062 | | INLCR /* disable translate NL to CR */ | |
1063 | | IGNCR /* disable ignore CR */ | |
1064 | | ICRNL /* disable translate CR to NL */ | |
1065 | | IXON); /* disable enable XON/XOFF flow control */ | |
1066 | ||
1da177e4 | 1067 | tty->termios->c_oflag /* output modes */ |
b9db07fb | 1068 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1069 | |
b9db07fb LM |
1070 | tty->termios->c_lflag /* line discipline modes */ |
1071 | &= ~(ECHO /* disable echo input characters */ | |
1072 | | ECHONL /* disable echo new line */ | |
1073 | | ICANON /* disable erase, kill, werase, and rprnt | |
1074 | special characters */ | |
1075 | | ISIG /* disable interrupt, quit, and suspend | |
1076 | special characters */ | |
1077 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1078 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1079 | |
1da177e4 LT |
1080 | linechange = (priv->line_control != oldlines); |
1081 | spin_unlock_irqrestore(&priv->lock, flags); | |
1082 | ||
1083 | /* if necessary, set lines */ | |
3cb4a4f7 | 1084 | if (linechange) { |
1da177e4 | 1085 | priv->cmd_ctrl = 1; |
95da310e | 1086 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1087 | } |
1da177e4 LT |
1088 | } /* cypress_set_termios */ |
1089 | ||
b9db07fb | 1090 | |
1da177e4 | 1091 | /* returns amount of data still left in soft buffer */ |
95da310e | 1092 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1093 | { |
95da310e | 1094 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1095 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1096 | int chars = 0; | |
1097 | unsigned long flags; | |
1098 | ||
441b62c1 | 1099 | dbg("%s - port %d", __func__, port->number); |
813a224f | 1100 | |
1da177e4 | 1101 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 1102 | chars = kfifo_len(&priv->write_fifo); |
1da177e4 LT |
1103 | spin_unlock_irqrestore(&priv->lock, flags); |
1104 | ||
441b62c1 | 1105 | dbg("%s - returns %d", __func__, chars); |
1da177e4 LT |
1106 | return chars; |
1107 | } | |
1108 | ||
1109 | ||
95da310e | 1110 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1111 | { |
95da310e | 1112 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1113 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1da177e4 | 1114 | |
441b62c1 | 1115 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1116 | |
63832515 | 1117 | spin_lock_irq(&priv->lock); |
1da177e4 | 1118 | priv->rx_flags = THROTTLED; |
63832515 | 1119 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
1120 | } |
1121 | ||
1122 | ||
95da310e | 1123 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1124 | { |
95da310e | 1125 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1126 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1127 | int actually_throttled, result; | |
1da177e4 | 1128 | |
441b62c1 | 1129 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1130 | |
63832515 | 1131 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
1132 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
1133 | priv->rx_flags = 0; | |
63832515 | 1134 | spin_unlock_irq(&priv->lock); |
1da177e4 | 1135 | |
78aef519 MI |
1136 | if (!priv->comm_is_ok) |
1137 | return; | |
1138 | ||
1da177e4 | 1139 | if (actually_throttled) { |
63832515 | 1140 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
78aef519 | 1141 | if (result) { |
b9db07fb | 1142 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1143 | "error %d\n", __func__, result); |
78aef519 MI |
1144 | cypress_set_dead(port); |
1145 | } | |
1da177e4 LT |
1146 | } |
1147 | } | |
1148 | ||
1149 | ||
7d12e780 | 1150 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1151 | { |
cdc97792 | 1152 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1153 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1154 | struct tty_struct *tty; | |
1155 | unsigned char *data = urb->transfer_buffer; | |
1156 | unsigned long flags; | |
b9db07fb | 1157 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1158 | int havedata = 0; |
1159 | int bytes = 0; | |
1160 | int result; | |
1161 | int i = 0; | |
8d7bc55e | 1162 | int status = urb->status; |
1da177e4 | 1163 | |
441b62c1 | 1164 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 1165 | |
8d7bc55e | 1166 | switch (status) { |
78aef519 MI |
1167 | case 0: /* success */ |
1168 | break; | |
1169 | case -ECONNRESET: | |
1170 | case -ENOENT: | |
1171 | case -ESHUTDOWN: | |
1172 | /* precursor to disconnect so just go away */ | |
1173 | return; | |
1174 | case -EPIPE: | |
4d2fae8b AS |
1175 | /* Can't call usb_clear_halt while in_interrupt */ |
1176 | /* FALLS THROUGH */ | |
78aef519 MI |
1177 | default: |
1178 | /* something ugly is going on... */ | |
813a224f AC |
1179 | dev_err(&urb->dev->dev, |
1180 | "%s - unexpected nonzero read status received: %d\n", | |
1181 | __func__, status); | |
78aef519 | 1182 | cypress_set_dead(port); |
1da177e4 LT |
1183 | return; |
1184 | } | |
1185 | ||
1186 | spin_lock_irqsave(&priv->lock, flags); | |
1187 | if (priv->rx_flags & THROTTLED) { | |
441b62c1 | 1188 | dbg("%s - now throttling", __func__); |
1da177e4 LT |
1189 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1190 | spin_unlock_irqrestore(&priv->lock, flags); | |
1191 | return; | |
1192 | } | |
1193 | spin_unlock_irqrestore(&priv->lock, flags); | |
1194 | ||
4a90f09b | 1195 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1196 | if (!tty) { |
441b62c1 | 1197 | dbg("%s - bad tty pointer - exiting", __func__); |
1da177e4 LT |
1198 | return; |
1199 | } | |
1200 | ||
1201 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1202 | result = urb->actual_length; |
1203 | switch (priv->pkt_fmt) { | |
1204 | default: | |
1205 | case packet_format_1: | |
1206 | /* This is for the CY7C64013... */ | |
1207 | priv->current_status = data[0] & 0xF8; | |
1208 | bytes = data[1] + 2; | |
1209 | i = 2; | |
1210 | if (bytes > 2) | |
1211 | havedata = 1; | |
1212 | break; | |
1213 | case packet_format_2: | |
1214 | /* This is for the CY7C63743... */ | |
1215 | priv->current_status = data[0] & 0xF8; | |
1216 | bytes = (data[0] & 0x07) + 1; | |
1217 | i = 1; | |
1218 | if (bytes > 1) | |
1219 | havedata = 1; | |
1220 | break; | |
1da177e4 LT |
1221 | } |
1222 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 MI |
1223 | if (result < bytes) { |
1224 | dbg("%s - wrong packet size - received %d bytes but packet " | |
1225 | "said %d bytes", __func__, result, bytes); | |
1226 | goto continue_read; | |
1227 | } | |
1da177e4 | 1228 | |
813a224f AC |
1229 | usb_serial_debug_data(debug, &port->dev, __func__, |
1230 | urb->actual_length, data); | |
1da177e4 LT |
1231 | |
1232 | spin_lock_irqsave(&priv->lock, flags); | |
1233 | /* check to see if status has changed */ | |
6768306c MI |
1234 | if (priv->current_status != priv->prev_status) { |
1235 | priv->diff_status |= priv->current_status ^ | |
1236 | priv->prev_status; | |
1237 | wake_up_interruptible(&priv->delta_msr_wait); | |
1238 | priv->prev_status = priv->current_status; | |
1da177e4 | 1239 | } |
b9db07fb | 1240 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1241 | |
b9db07fb LM |
1242 | /* hangup, as defined in acm.c... this might be a bad place for it |
1243 | * though */ | |
1244 | if (tty && !(tty->termios->c_cflag & CLOCAL) && | |
1245 | !(priv->current_status & UART_CD)) { | |
441b62c1 | 1246 | dbg("%s - calling hangup", __func__); |
1da177e4 LT |
1247 | tty_hangup(tty); |
1248 | goto continue_read; | |
1249 | } | |
1250 | ||
b9db07fb LM |
1251 | /* There is one error bit... I'm assuming it is a parity error |
1252 | * indicator as the generic firmware will set this bit to 1 if a | |
1253 | * parity error occurs. | |
1254 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1255 | spin_lock_irqsave(&priv->lock, flags); |
1256 | if (priv->current_status & CYP_ERROR) { | |
1257 | spin_unlock_irqrestore(&priv->lock, flags); | |
1258 | tty_flag = TTY_PARITY; | |
441b62c1 | 1259 | dbg("%s - Parity Error detected", __func__); |
1da177e4 LT |
1260 | } else |
1261 | spin_unlock_irqrestore(&priv->lock, flags); | |
1262 | ||
1263 | /* process read if there is data other than line status */ | |
a108bfcb AC |
1264 | if (tty && bytes > i) { |
1265 | tty_insert_flip_string_fixed_flag(tty, data + i, | |
70ced221 | 1266 | tty_flag, bytes - i); |
4a90f09b | 1267 | tty_flip_buffer_push(tty); |
1da177e4 LT |
1268 | } |
1269 | ||
1270 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1271 | /* control and status byte(s) are also counted */ |
1272 | priv->bytes_in += bytes; | |
1da177e4 LT |
1273 | spin_unlock_irqrestore(&priv->lock, flags); |
1274 | ||
1275 | continue_read: | |
4a90f09b | 1276 | tty_kref_put(tty); |
b9db07fb | 1277 | |
1f87158e | 1278 | /* Continue trying to always read */ |
1da177e4 | 1279 | |
1f87158e | 1280 | if (priv->comm_is_ok) { |
b9db07fb LM |
1281 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1282 | usb_rcvintpipe(port->serial->dev, | |
1283 | port->interrupt_in_endpointAddress), | |
1284 | port->interrupt_in_urb->transfer_buffer, | |
1285 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1286 | cypress_read_int_callback, port, |
1287 | priv->read_urb_interval); | |
b9db07fb | 1288 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
1f87158e | 1289 | if (result && result != -EPERM) { |
b9db07fb | 1290 | dev_err(&urb->dev->dev, "%s - failed resubmitting " |
441b62c1 | 1291 | "read urb, error %d\n", __func__, |
b9db07fb | 1292 | result); |
78aef519 MI |
1293 | cypress_set_dead(port); |
1294 | } | |
1da177e4 | 1295 | } |
1da177e4 LT |
1296 | } /* cypress_read_int_callback */ |
1297 | ||
1298 | ||
7d12e780 | 1299 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1300 | { |
cdc97792 | 1301 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1302 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1303 | int result; | |
8d7bc55e | 1304 | int status = urb->status; |
1da177e4 | 1305 | |
441b62c1 | 1306 | dbg("%s - port %d", __func__, port->number); |
8d7bc55e GKH |
1307 | |
1308 | switch (status) { | |
813a224f AC |
1309 | case 0: |
1310 | /* success */ | |
1311 | break; | |
1312 | case -ECONNRESET: | |
1313 | case -ENOENT: | |
1314 | case -ESHUTDOWN: | |
1315 | /* this urb is terminated, clean up */ | |
1316 | dbg("%s - urb shutting down with status: %d", | |
1317 | __func__, status); | |
1318 | priv->write_urb_in_use = 0; | |
1319 | return; | |
1320 | case -EPIPE: /* no break needed; clear halt and resubmit */ | |
1321 | if (!priv->comm_is_ok) | |
1da177e4 | 1322 | break; |
813a224f AC |
1323 | usb_clear_halt(port->serial->dev, 0x02); |
1324 | /* error in the urb, so we have to resubmit it */ | |
1325 | dbg("%s - nonzero write bulk status received: %d", | |
1326 | __func__, status); | |
1327 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
813a224f AC |
1328 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1329 | if (!result) | |
1da177e4 | 1330 | return; |
813a224f AC |
1331 | dev_err(&urb->dev->dev, |
1332 | "%s - failed resubmitting write urb, error %d\n", | |
1333 | __func__, result); | |
1334 | cypress_set_dead(port); | |
1335 | break; | |
1336 | default: | |
1337 | dev_err(&urb->dev->dev, | |
1338 | "%s - unexpected nonzero write status received: %d\n", | |
1339 | __func__, status); | |
1340 | cypress_set_dead(port); | |
1341 | break; | |
1da177e4 | 1342 | } |
1da177e4 | 1343 | priv->write_urb_in_use = 0; |
813a224f | 1344 | |
1da177e4 LT |
1345 | /* send any buffered data */ |
1346 | cypress_send(port); | |
1347 | } | |
1348 | ||
7e3131f8 | 1349 | module_usb_serial_driver(cypress_driver, serial_drivers); |
1da177e4 | 1350 | |
813a224f AC |
1351 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1352 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1353 | MODULE_VERSION(DRIVER_VERSION); | |
1da177e4 LT |
1354 | MODULE_LICENSE("GPL"); |
1355 | ||
1356 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1357 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1358 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1359 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1360 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1361 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); | |
c312659c MF |
1362 | module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR); |
1363 | MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates"); |