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Commit | Line | Data |
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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 | 91 | |
3416eaa1 MI |
92 | enum packet_format { |
93 | packet_format_1, /* b0:status, b1:payload count */ | |
94 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
95 | }; | |
96 | ||
1da177e4 LT |
97 | struct cypress_private { |
98 | spinlock_t lock; /* private lock */ | |
99 | int chiptype; /* identifier of device, for quirks/etc */ | |
100 | int bytes_in; /* used for statistics */ | |
101 | int bytes_out; /* used for statistics */ | |
102 | int cmd_count; /* used for statistics */ | |
103 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
117fb8d0 | 104 | struct kfifo write_fifo; /* write fifo */ |
1da177e4 | 105 | int write_urb_in_use; /* write urb in use indicator */ |
0257fa9f MI |
106 | int write_urb_interval; /* interval to use for write urb */ |
107 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 108 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
109 | int termios_initialized; |
110 | __u8 line_control; /* holds dtr / rts value */ | |
111 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
112 | __u8 current_config; /* stores the current configuration byte */ | |
113 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 114 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 115 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
116 | int baud_rate; /* stores current baud rate in |
117 | integer form */ | |
1da177e4 LT |
118 | int isthrottled; /* if throttled, discard reads */ |
119 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ | |
120 | char prev_status, diff_status; /* used for TIOCMIWAIT */ | |
3ad2f3fb | 121 | /* we pass a pointer to this as the argument sent to |
813a224f | 122 | cypress_set_termios old_termios */ |
606d099c | 123 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
124 | }; |
125 | ||
1da177e4 | 126 | /* function prototypes for the Cypress USB to serial device */ |
813a224f AC |
127 | static int cypress_earthmate_startup(struct usb_serial *serial); |
128 | static int cypress_hidcom_startup(struct usb_serial *serial); | |
129 | static int cypress_ca42v2_startup(struct usb_serial *serial); | |
f9c99bb8 | 130 | static void cypress_release(struct usb_serial *serial); |
a509a7e4 | 131 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
132 | static void cypress_close(struct usb_serial_port *port); |
133 | static void cypress_dtr_rts(struct usb_serial_port *port, int on); | |
813a224f AC |
134 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
135 | const unsigned char *buf, int count); | |
136 | static void cypress_send(struct usb_serial_port *port); | |
137 | static int cypress_write_room(struct tty_struct *tty); | |
00a0d0d6 | 138 | static int cypress_ioctl(struct tty_struct *tty, |
813a224f AC |
139 | unsigned int cmd, unsigned long arg); |
140 | static void cypress_set_termios(struct tty_struct *tty, | |
141 | struct usb_serial_port *port, struct ktermios *old); | |
60b33c13 | 142 | static int cypress_tiocmget(struct tty_struct *tty); |
20b9d177 | 143 | static int cypress_tiocmset(struct tty_struct *tty, |
813a224f AC |
144 | unsigned int set, unsigned int clear); |
145 | static int cypress_chars_in_buffer(struct tty_struct *tty); | |
146 | static void cypress_throttle(struct tty_struct *tty); | |
147 | static void cypress_unthrottle(struct tty_struct *tty); | |
148 | static void cypress_set_dead(struct usb_serial_port *port); | |
149 | static void cypress_read_int_callback(struct urb *urb); | |
150 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 | 151 | |
ea65370d | 152 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
153 | .driver = { |
154 | .owner = THIS_MODULE, | |
269bda1c | 155 | .name = "earthmate", |
18fcac35 | 156 | }, |
269bda1c | 157 | .description = "DeLorme Earthmate USB", |
1da177e4 | 158 | .id_table = id_table_earthmate, |
1da177e4 LT |
159 | .num_ports = 1, |
160 | .attach = cypress_earthmate_startup, | |
f9c99bb8 | 161 | .release = cypress_release, |
1da177e4 LT |
162 | .open = cypress_open, |
163 | .close = cypress_close, | |
335f8514 | 164 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
165 | .write = cypress_write, |
166 | .write_room = cypress_write_room, | |
167 | .ioctl = cypress_ioctl, | |
168 | .set_termios = cypress_set_termios, | |
169 | .tiocmget = cypress_tiocmget, | |
170 | .tiocmset = cypress_tiocmset, | |
171 | .chars_in_buffer = cypress_chars_in_buffer, | |
172 | .throttle = cypress_throttle, | |
173 | .unthrottle = cypress_unthrottle, | |
174 | .read_int_callback = cypress_read_int_callback, | |
175 | .write_int_callback = cypress_write_int_callback, | |
176 | }; | |
177 | ||
ea65370d | 178 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
179 | .driver = { |
180 | .owner = THIS_MODULE, | |
269bda1c | 181 | .name = "cyphidcom", |
18fcac35 | 182 | }, |
269bda1c | 183 | .description = "HID->COM RS232 Adapter", |
1da177e4 | 184 | .id_table = id_table_cyphidcomrs232, |
1da177e4 LT |
185 | .num_ports = 1, |
186 | .attach = cypress_hidcom_startup, | |
f9c99bb8 | 187 | .release = cypress_release, |
1da177e4 LT |
188 | .open = cypress_open, |
189 | .close = cypress_close, | |
335f8514 | 190 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
191 | .write = cypress_write, |
192 | .write_room = cypress_write_room, | |
193 | .ioctl = cypress_ioctl, | |
194 | .set_termios = cypress_set_termios, | |
195 | .tiocmget = cypress_tiocmget, | |
196 | .tiocmset = cypress_tiocmset, | |
197 | .chars_in_buffer = cypress_chars_in_buffer, | |
198 | .throttle = cypress_throttle, | |
199 | .unthrottle = cypress_unthrottle, | |
200 | .read_int_callback = cypress_read_int_callback, | |
201 | .write_int_callback = cypress_write_int_callback, | |
202 | }; | |
203 | ||
a5c44e29 LM |
204 | static struct usb_serial_driver cypress_ca42v2_device = { |
205 | .driver = { | |
206 | .owner = THIS_MODULE, | |
813a224f | 207 | .name = "nokiaca42v2", |
a5c44e29 LM |
208 | }, |
209 | .description = "Nokia CA-42 V2 Adapter", | |
210 | .id_table = id_table_nokiaca42v2, | |
a5c44e29 LM |
211 | .num_ports = 1, |
212 | .attach = cypress_ca42v2_startup, | |
f9c99bb8 | 213 | .release = cypress_release, |
a5c44e29 LM |
214 | .open = cypress_open, |
215 | .close = cypress_close, | |
335f8514 | 216 | .dtr_rts = cypress_dtr_rts, |
a5c44e29 LM |
217 | .write = cypress_write, |
218 | .write_room = cypress_write_room, | |
219 | .ioctl = cypress_ioctl, | |
220 | .set_termios = cypress_set_termios, | |
221 | .tiocmget = cypress_tiocmget, | |
222 | .tiocmset = cypress_tiocmset, | |
223 | .chars_in_buffer = cypress_chars_in_buffer, | |
224 | .throttle = cypress_throttle, | |
225 | .unthrottle = cypress_unthrottle, | |
226 | .read_int_callback = cypress_read_int_callback, | |
227 | .write_int_callback = cypress_write_int_callback, | |
228 | }; | |
1da177e4 | 229 | |
08a4f6bc AS |
230 | static struct usb_serial_driver * const serial_drivers[] = { |
231 | &cypress_earthmate_device, &cypress_hidcom_device, | |
232 | &cypress_ca42v2_device, NULL | |
233 | }; | |
234 | ||
1da177e4 LT |
235 | /***************************************************************************** |
236 | * Cypress serial helper functions | |
237 | *****************************************************************************/ | |
238 | ||
239 | ||
8873aaa6 | 240 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 241 | { |
92983c21 MI |
242 | struct cypress_private *priv; |
243 | priv = usb_get_serial_port_data(port); | |
244 | ||
c312659c MF |
245 | if (unstable_bauds) |
246 | return new_rate; | |
247 | ||
92983c21 MI |
248 | /* |
249 | * The general purpose firmware for the Cypress M8 allows for | |
250 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
251 | * chose to use the general purpose firmware or not), if you | |
252 | * need to modify this speed setting for your own project | |
253 | * please add your own chiptype and modify the code likewise. | |
254 | * The Cypress HID->COM device will work successfully up to | |
255 | * 115200bps (but the actual throughput is around 3kBps). | |
256 | */ | |
92983c21 MI |
257 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
258 | /* | |
259 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
260 | * Cypress app note that describes this mechanism | |
261 | * states the the low-speed part can't handle more | |
262 | * than 800 bytes/sec, in which case 4800 baud is the | |
263 | * safest speed for a part like that. | |
264 | */ | |
265 | if (new_rate > 4800) { | |
dfa1c315 GKH |
266 | dev_dbg(&port->dev, |
267 | "%s - failed setting baud rate, device incapable speed %d\n", | |
268 | __func__, new_rate); | |
92983c21 MI |
269 | return -1; |
270 | } | |
271 | } | |
272 | switch (priv->chiptype) { | |
273 | case CT_EARTHMATE: | |
274 | if (new_rate <= 600) { | |
275 | /* 300 and 600 baud rates are supported under | |
276 | * the generic firmware, but are not used with | |
277 | * NMEA and SiRF protocols */ | |
dfa1c315 GKH |
278 | dev_dbg(&port->dev, |
279 | "%s - failed setting baud rate, unsupported speed of %d on Earthmate GPS", | |
280 | __func__, new_rate); | |
92983c21 MI |
281 | return -1; |
282 | } | |
283 | break; | |
284 | default: | |
285 | break; | |
286 | } | |
287 | return new_rate; | |
288 | } | |
289 | ||
290 | ||
093cf723 | 291 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 292 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
293 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
294 | int stop_bits, int parity_enable, int parity_type, int reset, | |
295 | int cypress_request_type) | |
1da177e4 | 296 | { |
3cb4a4f7 | 297 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 298 | struct cypress_private *priv; |
dfa1c315 | 299 | struct device *dev = &port->dev; |
0954644b JH |
300 | u8 *feature_buffer; |
301 | const unsigned int feature_len = 5; | |
1da177e4 LT |
302 | unsigned long flags; |
303 | ||
1da177e4 LT |
304 | priv = usb_get_serial_port_data(port); |
305 | ||
78aef519 MI |
306 | if (!priv->comm_is_ok) |
307 | return -ENODEV; | |
308 | ||
0954644b JH |
309 | feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL); |
310 | if (!feature_buffer) | |
311 | return -ENOMEM; | |
312 | ||
813a224f AC |
313 | switch (cypress_request_type) { |
314 | case CYPRESS_SET_CONFIG: | |
813a224f | 315 | /* 0 means 'Hang up' so doesn't change the true bit rate */ |
2805eb13 MF |
316 | new_baudrate = priv->baud_rate; |
317 | if (baud_rate && baud_rate != priv->baud_rate) { | |
dfa1c315 | 318 | dev_dbg(dev, "%s - baud rate is changing\n", __func__); |
813a224f | 319 | retval = analyze_baud_rate(port, baud_rate); |
2805eb13 | 320 | if (retval >= 0) { |
813a224f | 321 | new_baudrate = retval; |
dfa1c315 GKH |
322 | dev_dbg(dev, "%s - New baud rate set to %d\n", |
323 | __func__, new_baudrate); | |
1da177e4 | 324 | } |
813a224f | 325 | } |
dfa1c315 GKH |
326 | dev_dbg(dev, "%s - baud rate is being sent as %d\n", __func__, |
327 | new_baudrate); | |
813a224f | 328 | |
813a224f | 329 | /* fill the feature_buffer with new configuration */ |
0f2c2d7b | 330 | put_unaligned_le32(new_baudrate, feature_buffer); |
813a224f AC |
331 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
332 | /* 1 bit gap */ | |
333 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
334 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
335 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
336 | /* 1 bit gap */ | |
337 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
338 | ||
dfa1c315 GKH |
339 | dev_dbg(dev, "%s - device is being sent this feature report:\n", __func__); |
340 | dev_dbg(dev, "%s - %02X - %02X - %02X - %02X - %02X\n", __func__, | |
813a224f AC |
341 | feature_buffer[0], feature_buffer[1], |
342 | feature_buffer[2], feature_buffer[3], | |
343 | feature_buffer[4]); | |
344 | ||
345 | do { | |
346 | retval = usb_control_msg(port->serial->dev, | |
347 | usb_sndctrlpipe(port->serial->dev, 0), | |
348 | HID_REQ_SET_REPORT, | |
349 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
350 | 0x0300, 0, feature_buffer, | |
0954644b | 351 | feature_len, 500); |
813a224f AC |
352 | |
353 | if (tries++ >= 3) | |
354 | break; | |
355 | ||
0954644b | 356 | } while (retval != feature_len && |
813a224f AC |
357 | retval != -ENODEV); |
358 | ||
0954644b | 359 | if (retval != feature_len) { |
dfa1c315 GKH |
360 | dev_err(dev, "%s - failed sending serial line settings - %d\n", |
361 | __func__, retval); | |
813a224f AC |
362 | cypress_set_dead(port); |
363 | } else { | |
364 | spin_lock_irqsave(&priv->lock, flags); | |
365 | priv->baud_rate = new_baudrate; | |
366 | priv->current_config = feature_buffer[4]; | |
367 | spin_unlock_irqrestore(&priv->lock, flags); | |
368 | /* If we asked for a speed change encode it */ | |
369 | if (baud_rate) | |
370 | tty_encode_baud_rate(tty, | |
371 | new_baudrate, new_baudrate); | |
372 | } | |
373 | break; | |
374 | case CYPRESS_GET_CONFIG: | |
375 | if (priv->get_cfg_unsafe) { | |
376 | /* Not implemented for this device, | |
377 | and if we try to do it we're likely | |
378 | to crash the hardware. */ | |
0954644b JH |
379 | retval = -ENOTTY; |
380 | goto out; | |
813a224f | 381 | } |
dfa1c315 | 382 | dev_dbg(dev, "%s - retreiving serial line settings\n", __func__); |
813a224f AC |
383 | do { |
384 | retval = usb_control_msg(port->serial->dev, | |
385 | usb_rcvctrlpipe(port->serial->dev, 0), | |
386 | HID_REQ_GET_REPORT, | |
387 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
388 | 0x0300, 0, feature_buffer, | |
0954644b | 389 | feature_len, 500); |
813a224f AC |
390 | |
391 | if (tries++ >= 3) | |
392 | break; | |
0954644b | 393 | } while (retval != feature_len |
813a224f AC |
394 | && retval != -ENODEV); |
395 | ||
0954644b | 396 | if (retval != feature_len) { |
dfa1c315 GKH |
397 | dev_err(dev, "%s - failed to retrieve serial line settings - %d\n", |
398 | __func__, retval); | |
813a224f | 399 | cypress_set_dead(port); |
0954644b | 400 | goto out; |
813a224f AC |
401 | } else { |
402 | spin_lock_irqsave(&priv->lock, flags); | |
403 | /* store the config in one byte, and later | |
404 | use bit masks to check values */ | |
405 | priv->current_config = feature_buffer[4]; | |
0f2c2d7b | 406 | priv->baud_rate = get_unaligned_le32(feature_buffer); |
813a224f AC |
407 | spin_unlock_irqrestore(&priv->lock, flags); |
408 | } | |
1da177e4 | 409 | } |
3cb4a4f7 LM |
410 | spin_lock_irqsave(&priv->lock, flags); |
411 | ++priv->cmd_count; | |
412 | spin_unlock_irqrestore(&priv->lock, flags); | |
0954644b JH |
413 | out: |
414 | kfree(feature_buffer); | |
1da177e4 LT |
415 | return retval; |
416 | } /* cypress_serial_control */ | |
417 | ||
418 | ||
78aef519 MI |
419 | static void cypress_set_dead(struct usb_serial_port *port) |
420 | { | |
421 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
422 | unsigned long flags; | |
423 | ||
424 | spin_lock_irqsave(&priv->lock, flags); | |
425 | if (!priv->comm_is_ok) { | |
426 | spin_unlock_irqrestore(&priv->lock, flags); | |
427 | return; | |
428 | } | |
429 | priv->comm_is_ok = 0; | |
430 | spin_unlock_irqrestore(&priv->lock, flags); | |
431 | ||
194343d9 GKH |
432 | dev_err(&port->dev, "cypress_m8 suspending failing port %d - " |
433 | "interval might be too short\n", port->number); | |
78aef519 MI |
434 | } |
435 | ||
436 | ||
1da177e4 LT |
437 | /***************************************************************************** |
438 | * Cypress serial driver functions | |
439 | *****************************************************************************/ | |
440 | ||
441 | ||
813a224f | 442 | static int generic_startup(struct usb_serial *serial) |
1da177e4 LT |
443 | { |
444 | struct cypress_private *priv; | |
0257fa9f | 445 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 446 | |
813a224f | 447 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
448 | if (!priv) |
449 | return -ENOMEM; | |
450 | ||
78aef519 | 451 | priv->comm_is_ok = !0; |
1da177e4 | 452 | spin_lock_init(&priv->lock); |
117fb8d0 | 453 | if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) { |
1da177e4 LT |
454 | kfree(priv); |
455 | return -ENOMEM; | |
456 | } | |
457 | init_waitqueue_head(&priv->delta_msr_wait); | |
813a224f AC |
458 | |
459 | usb_reset_configuration(serial->dev); | |
460 | ||
1da177e4 LT |
461 | priv->cmd_ctrl = 0; |
462 | priv->line_control = 0; | |
463 | priv->termios_initialized = 0; | |
1da177e4 | 464 | priv->rx_flags = 0; |
3416eaa1 MI |
465 | /* Default packet format setting is determined by packet size. |
466 | Anything with a size larger then 9 must have a separate | |
467 | count field since the 3 bit count field is otherwise too | |
468 | small. Otherwise we can use the slightly more compact | |
469 | format. This is in accordance with the cypress_m8 serial | |
470 | converter app note. */ | |
813a224f | 471 | if (port->interrupt_out_size > 9) |
3416eaa1 | 472 | priv->pkt_fmt = packet_format_1; |
813a224f | 473 | else |
3416eaa1 | 474 | priv->pkt_fmt = packet_format_2; |
813a224f | 475 | |
0257fa9f MI |
476 | if (interval > 0) { |
477 | priv->write_urb_interval = interval; | |
478 | priv->read_urb_interval = interval; | |
dfa1c315 GKH |
479 | dev_dbg(&port->dev, "%s - read & write intervals forced to %d\n", |
480 | __func__, interval); | |
0257fa9f MI |
481 | } else { |
482 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
483 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
dfa1c315 GKH |
484 | dev_dbg(&port->dev, "%s - intervals: read=%d write=%d\n", |
485 | __func__, priv->read_urb_interval, | |
486 | priv->write_urb_interval); | |
0257fa9f MI |
487 | } |
488 | usb_set_serial_port_data(port, priv); | |
813a224f | 489 | |
b9db07fb LM |
490 | return 0; |
491 | } | |
1da177e4 LT |
492 | |
493 | ||
813a224f | 494 | static int cypress_earthmate_startup(struct usb_serial *serial) |
1da177e4 LT |
495 | { |
496 | struct cypress_private *priv; | |
3d6aa320 | 497 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 498 | |
1da177e4 | 499 | if (generic_startup(serial)) { |
dfa1c315 | 500 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
1da177e4 LT |
501 | return 1; |
502 | } | |
503 | ||
3d6aa320 | 504 | priv = usb_get_serial_port_data(port); |
1da177e4 | 505 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
506 | /* All Earthmate devices use the separated-count packet |
507 | format! Idiotic. */ | |
508 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
509 | if (serial->dev->descriptor.idProduct != |
510 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
511 | /* The old original USB Earthmate seemed able to |
512 | handle GET_CONFIG requests; everything they've | |
513 | produced since that time crashes if this command is | |
514 | attempted :-( */ | |
dfa1c315 GKH |
515 | dev_dbg(&port->dev, |
516 | "%s - Marking this device as unsafe for GET_CONFIG commands\n", | |
517 | __func__); | |
3d6aa320 MI |
518 | priv->get_cfg_unsafe = !0; |
519 | } | |
b9db07fb LM |
520 | |
521 | return 0; | |
1da177e4 LT |
522 | } /* cypress_earthmate_startup */ |
523 | ||
524 | ||
813a224f | 525 | static int cypress_hidcom_startup(struct usb_serial *serial) |
1da177e4 LT |
526 | { |
527 | struct cypress_private *priv; | |
dfa1c315 | 528 | struct usb_serial_port *port = serial->port[0]; |
1da177e4 | 529 | |
1da177e4 | 530 | if (generic_startup(serial)) { |
dfa1c315 | 531 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
1da177e4 LT |
532 | return 1; |
533 | } | |
534 | ||
dfa1c315 | 535 | priv = usb_get_serial_port_data(port); |
1da177e4 | 536 | priv->chiptype = CT_CYPHIDCOM; |
813a224f | 537 | |
b9db07fb | 538 | return 0; |
1da177e4 LT |
539 | } /* cypress_hidcom_startup */ |
540 | ||
541 | ||
813a224f | 542 | static int cypress_ca42v2_startup(struct usb_serial *serial) |
a5c44e29 LM |
543 | { |
544 | struct cypress_private *priv; | |
dfa1c315 | 545 | struct usb_serial_port *port = serial->port[0]; |
a5c44e29 | 546 | |
a5c44e29 | 547 | if (generic_startup(serial)) { |
dfa1c315 | 548 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
a5c44e29 LM |
549 | return 1; |
550 | } | |
551 | ||
dfa1c315 | 552 | priv = usb_get_serial_port_data(port); |
a5c44e29 LM |
553 | priv->chiptype = CT_CA42V2; |
554 | ||
555 | return 0; | |
556 | } /* cypress_ca42v2_startup */ | |
557 | ||
558 | ||
f9c99bb8 | 559 | static void cypress_release(struct usb_serial *serial) |
1da177e4 LT |
560 | { |
561 | struct cypress_private *priv; | |
562 | ||
1da177e4 | 563 | /* all open ports are closed at this point */ |
1da177e4 LT |
564 | priv = usb_get_serial_port_data(serial->port[0]); |
565 | ||
566 | if (priv) { | |
117fb8d0 | 567 | kfifo_free(&priv->write_fifo); |
1da177e4 | 568 | kfree(priv); |
1da177e4 LT |
569 | } |
570 | } | |
571 | ||
572 | ||
a509a7e4 | 573 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
574 | { |
575 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
576 | struct usb_serial *serial = port->serial; | |
577 | unsigned long flags; | |
578 | int result = 0; | |
579 | ||
78aef519 MI |
580 | if (!priv->comm_is_ok) |
581 | return -EIO; | |
582 | ||
1da177e4 | 583 | /* clear halts before open */ |
1da177e4 LT |
584 | usb_clear_halt(serial->dev, 0x81); |
585 | usb_clear_halt(serial->dev, 0x02); | |
586 | ||
587 | spin_lock_irqsave(&priv->lock, flags); | |
588 | /* reset read/write statistics */ | |
589 | priv->bytes_in = 0; | |
590 | priv->bytes_out = 0; | |
591 | priv->cmd_count = 0; | |
592 | priv->rx_flags = 0; | |
593 | spin_unlock_irqrestore(&priv->lock, flags); | |
594 | ||
335f8514 | 595 | /* Set termios */ |
fe1ae7fd | 596 | cypress_send(port); |
1da177e4 | 597 | |
95da310e AC |
598 | if (tty) |
599 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
600 | |
601 | /* setup the port and start reading from the device */ | |
813a224f | 602 | if (!port->interrupt_in_urb) { |
194343d9 GKH |
603 | dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n", |
604 | __func__); | |
813a224f | 605 | return -1; |
1da177e4 LT |
606 | } |
607 | ||
608 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
609 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
610 | port->interrupt_in_urb->transfer_buffer, |
611 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 612 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
613 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
614 | ||
813a224f AC |
615 | if (result) { |
616 | dev_err(&port->dev, | |
617 | "%s - failed submitting read urb, error %d\n", | |
618 | __func__, result); | |
78aef519 | 619 | cypress_set_dead(port); |
1da177e4 | 620 | } |
335f8514 | 621 | port->port.drain_delay = 256; |
1da177e4 LT |
622 | return result; |
623 | } /* cypress_open */ | |
624 | ||
335f8514 AC |
625 | static void cypress_dtr_rts(struct usb_serial_port *port, int on) |
626 | { | |
627 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
628 | /* drop dtr and rts */ | |
335f8514 AC |
629 | spin_lock_irq(&priv->lock); |
630 | if (on == 0) | |
631 | priv->line_control = 0; | |
632 | else | |
633 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
634 | priv->cmd_ctrl = 1; | |
635 | spin_unlock_irq(&priv->lock); | |
636 | cypress_write(NULL, port, NULL, 0); | |
637 | } | |
1da177e4 | 638 | |
335f8514 | 639 | static void cypress_close(struct usb_serial_port *port) |
1da177e4 LT |
640 | { |
641 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
117fb8d0 | 642 | unsigned long flags; |
1da177e4 | 643 | |
9e3b1d8e ON |
644 | /* writing is potentially harmful, lock must be taken */ |
645 | mutex_lock(&port->serial->disc_mutex); | |
646 | if (port->serial->disconnected) { | |
647 | mutex_unlock(&port->serial->disc_mutex); | |
648 | return; | |
649 | } | |
117fb8d0 JH |
650 | spin_lock_irqsave(&priv->lock, flags); |
651 | kfifo_reset_out(&priv->write_fifo); | |
652 | spin_unlock_irqrestore(&priv->lock, flags); | |
653 | ||
dfa1c315 | 654 | dev_dbg(&port->dev, "%s - stopping urbs\n", __func__); |
813a224f AC |
655 | usb_kill_urb(port->interrupt_in_urb); |
656 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 657 | |
1da177e4 | 658 | if (stats) |
813a224f AC |
659 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
660 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
9e3b1d8e | 661 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
662 | } /* cypress_close */ |
663 | ||
664 | ||
95da310e AC |
665 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
666 | const unsigned char *buf, int count) | |
1da177e4 LT |
667 | { |
668 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
813a224f | 669 | |
dfa1c315 | 670 | dev_dbg(&port->dev, "%s - port %d, %d bytes\n", __func__, port->number, count); |
1da177e4 LT |
671 | |
672 | /* line control commands, which need to be executed immediately, | |
673 | are not put into the buffer for obvious reasons. | |
674 | */ | |
675 | if (priv->cmd_ctrl) { | |
676 | count = 0; | |
677 | goto finish; | |
678 | } | |
813a224f | 679 | |
1da177e4 LT |
680 | if (!count) |
681 | return count; | |
813a224f | 682 | |
117fb8d0 | 683 | count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock); |
1da177e4 LT |
684 | |
685 | finish: | |
686 | cypress_send(port); | |
687 | ||
688 | return count; | |
689 | } /* cypress_write */ | |
690 | ||
691 | ||
692 | static void cypress_send(struct usb_serial_port *port) | |
693 | { | |
694 | int count = 0, result, offset, actual_size; | |
695 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
dfa1c315 | 696 | struct device *dev = &port->dev; |
1da177e4 | 697 | unsigned long flags; |
813a224f | 698 | |
78aef519 MI |
699 | if (!priv->comm_is_ok) |
700 | return; | |
701 | ||
dfa1c315 GKH |
702 | dev_dbg(dev, "%s - interrupt out size is %d\n", __func__, |
703 | port->interrupt_out_size); | |
813a224f | 704 | |
1da177e4 LT |
705 | spin_lock_irqsave(&priv->lock, flags); |
706 | if (priv->write_urb_in_use) { | |
dfa1c315 | 707 | dev_dbg(dev, "%s - can't write, urb in use\n", __func__); |
1da177e4 LT |
708 | spin_unlock_irqrestore(&priv->lock, flags); |
709 | return; | |
710 | } | |
711 | spin_unlock_irqrestore(&priv->lock, flags); | |
712 | ||
713 | /* clear buffer */ | |
813a224f AC |
714 | memset(port->interrupt_out_urb->transfer_buffer, 0, |
715 | port->interrupt_out_size); | |
1da177e4 LT |
716 | |
717 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
718 | switch (priv->pkt_fmt) { |
719 | default: | |
720 | case packet_format_1: | |
721 | /* this is for the CY7C64013... */ | |
722 | offset = 2; | |
723 | port->interrupt_out_buffer[0] = priv->line_control; | |
724 | break; | |
725 | case packet_format_2: | |
726 | /* this is for the CY7C63743... */ | |
727 | offset = 1; | |
728 | port->interrupt_out_buffer[0] = priv->line_control; | |
729 | break; | |
1da177e4 LT |
730 | } |
731 | ||
732 | if (priv->line_control & CONTROL_RESET) | |
733 | priv->line_control &= ~CONTROL_RESET; | |
734 | ||
735 | if (priv->cmd_ctrl) { | |
736 | priv->cmd_count++; | |
dfa1c315 | 737 | dev_dbg(dev, "%s - line control command being issued\n", __func__); |
1da177e4 LT |
738 | spin_unlock_irqrestore(&priv->lock, flags); |
739 | goto send; | |
740 | } else | |
741 | spin_unlock_irqrestore(&priv->lock, flags); | |
742 | ||
117fb8d0 JH |
743 | count = kfifo_out_locked(&priv->write_fifo, |
744 | &port->interrupt_out_buffer[offset], | |
745 | port->interrupt_out_size - offset, | |
746 | &priv->lock); | |
813a224f | 747 | if (count == 0) |
1da177e4 | 748 | return; |
1da177e4 | 749 | |
3416eaa1 MI |
750 | switch (priv->pkt_fmt) { |
751 | default: | |
752 | case packet_format_1: | |
753 | port->interrupt_out_buffer[1] = count; | |
754 | break; | |
755 | case packet_format_2: | |
756 | port->interrupt_out_buffer[0] |= count; | |
1da177e4 LT |
757 | } |
758 | ||
dfa1c315 | 759 | dev_dbg(dev, "%s - count is %d\n", __func__, count); |
1da177e4 LT |
760 | |
761 | send: | |
762 | spin_lock_irqsave(&priv->lock, flags); | |
763 | priv->write_urb_in_use = 1; | |
764 | spin_unlock_irqrestore(&priv->lock, flags); | |
765 | ||
766 | if (priv->cmd_ctrl) | |
767 | actual_size = 1; | |
768 | else | |
3416eaa1 MI |
769 | actual_size = count + |
770 | (priv->pkt_fmt == packet_format_1 ? 2 : 1); | |
771 | ||
813a224f AC |
772 | usb_serial_debug_data(debug, &port->dev, __func__, |
773 | port->interrupt_out_size, | |
774 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 775 | |
9aa8dae7 MI |
776 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
777 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
778 | port->interrupt_out_buffer, port->interrupt_out_size, | |
779 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 780 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 781 | if (result) { |
22a416c4 | 782 | dev_err_console(port, |
813a224f AC |
783 | "%s - failed submitting write urb, error %d\n", |
784 | __func__, result); | |
1da177e4 | 785 | priv->write_urb_in_use = 0; |
78aef519 | 786 | cypress_set_dead(port); |
1da177e4 LT |
787 | } |
788 | ||
789 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 790 | if (priv->cmd_ctrl) |
1da177e4 | 791 | priv->cmd_ctrl = 0; |
813a224f AC |
792 | |
793 | /* do not count the line control and size bytes */ | |
794 | priv->bytes_out += count; | |
1da177e4 LT |
795 | spin_unlock_irqrestore(&priv->lock, flags); |
796 | ||
cf2c7481 | 797 | usb_serial_port_softint(port); |
1da177e4 LT |
798 | } /* cypress_send */ |
799 | ||
800 | ||
801 | /* returns how much space is available in the soft buffer */ | |
95da310e | 802 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 803 | { |
95da310e | 804 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
805 | struct cypress_private *priv = usb_get_serial_port_data(port); |
806 | int room = 0; | |
807 | unsigned long flags; | |
808 | ||
1da177e4 | 809 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 810 | room = kfifo_avail(&priv->write_fifo); |
1da177e4 LT |
811 | spin_unlock_irqrestore(&priv->lock, flags); |
812 | ||
dfa1c315 | 813 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
1da177e4 LT |
814 | return room; |
815 | } | |
816 | ||
817 | ||
60b33c13 | 818 | static int cypress_tiocmget(struct tty_struct *tty) |
1da177e4 | 819 | { |
95da310e | 820 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
821 | struct cypress_private *priv = usb_get_serial_port_data(port); |
822 | __u8 status, control; | |
823 | unsigned int result = 0; | |
824 | unsigned long flags; | |
813a224f | 825 | |
1da177e4 LT |
826 | spin_lock_irqsave(&priv->lock, flags); |
827 | control = priv->line_control; | |
828 | status = priv->current_status; | |
829 | spin_unlock_irqrestore(&priv->lock, flags); | |
830 | ||
831 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
832 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
833 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
834 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
835 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
836 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
837 | ||
dfa1c315 | 838 | dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); |
1da177e4 LT |
839 | |
840 | return result; | |
841 | } | |
842 | ||
843 | ||
20b9d177 | 844 | static int cypress_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
845 | unsigned int set, unsigned int clear) |
846 | { | |
95da310e | 847 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
848 | struct cypress_private *priv = usb_get_serial_port_data(port); |
849 | unsigned long flags; | |
813a224f | 850 | |
1da177e4 LT |
851 | spin_lock_irqsave(&priv->lock, flags); |
852 | if (set & TIOCM_RTS) | |
853 | priv->line_control |= CONTROL_RTS; | |
854 | if (set & TIOCM_DTR) | |
855 | priv->line_control |= CONTROL_DTR; | |
856 | if (clear & TIOCM_RTS) | |
857 | priv->line_control &= ~CONTROL_RTS; | |
858 | if (clear & TIOCM_DTR) | |
859 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 860 | priv->cmd_ctrl = 1; |
1da177e4 LT |
861 | spin_unlock_irqrestore(&priv->lock, flags); |
862 | ||
95da310e | 863 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
864 | } |
865 | ||
866 | ||
00a0d0d6 | 867 | static int cypress_ioctl(struct tty_struct *tty, |
95da310e | 868 | unsigned int cmd, unsigned long arg) |
1da177e4 | 869 | { |
95da310e | 870 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
871 | struct cypress_private *priv = usb_get_serial_port_data(port); |
872 | ||
dfa1c315 | 873 | dev_dbg(&port->dev, "%s - port %d, cmd 0x%.4x\n", __func__, port->number, cmd); |
1da177e4 LT |
874 | |
875 | switch (cmd) { | |
813a224f AC |
876 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ |
877 | case TIOCMIWAIT: | |
878 | while (priv != NULL) { | |
879 | interruptible_sleep_on(&priv->delta_msr_wait); | |
880 | /* see if a signal did it */ | |
881 | if (signal_pending(current)) | |
882 | return -ERESTARTSYS; | |
883 | else { | |
884 | char diff = priv->diff_status; | |
885 | if (diff == 0) | |
886 | return -EIO; /* no change => error */ | |
887 | ||
888 | /* consume all events */ | |
889 | priv->diff_status = 0; | |
890 | ||
891 | /* return 0 if caller wanted to know about | |
892 | these bits */ | |
893 | if (((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
894 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
895 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
896 | ((arg & TIOCM_CTS) && (diff & UART_CTS))) | |
897 | return 0; | |
898 | /* otherwise caller can't care less about what | |
899 | * happened, and so we continue to wait for | |
900 | * more events. | |
901 | */ | |
1da177e4 | 902 | } |
813a224f AC |
903 | } |
904 | return 0; | |
905 | default: | |
906 | break; | |
1da177e4 | 907 | } |
dfa1c315 | 908 | dev_dbg(&port->dev, "%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h\n", __func__, cmd); |
1da177e4 LT |
909 | return -ENOIOCTLCMD; |
910 | } /* cypress_ioctl */ | |
911 | ||
912 | ||
95da310e AC |
913 | static void cypress_set_termios(struct tty_struct *tty, |
914 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
915 | { |
916 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
dfa1c315 | 917 | struct device *dev = &port->dev; |
1da177e4 | 918 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 919 | unsigned cflag, iflag; |
1da177e4 LT |
920 | unsigned long flags; |
921 | __u8 oldlines; | |
3cb4a4f7 | 922 | int linechange = 0; |
b9db07fb | 923 | |
1da177e4 | 924 | spin_lock_irqsave(&priv->lock, flags); |
fe1ae7fd AC |
925 | /* We can't clean this one up as we don't know the device type |
926 | early enough */ | |
1da177e4 LT |
927 | if (!priv->termios_initialized) { |
928 | if (priv->chiptype == CT_EARTHMATE) { | |
929 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
930 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
931 | CLOCAL; | |
8873aaa6 AC |
932 | tty->termios->c_ispeed = 4800; |
933 | tty->termios->c_ospeed = 4800; | |
1da177e4 LT |
934 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
935 | *(tty->termios) = tty_std_termios; | |
b9db07fb LM |
936 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
937 | CLOCAL; | |
8873aaa6 AC |
938 | tty->termios->c_ispeed = 9600; |
939 | tty->termios->c_ospeed = 9600; | |
a5c44e29 LM |
940 | } else if (priv->chiptype == CT_CA42V2) { |
941 | *(tty->termios) = tty_std_termios; | |
942 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
943 | CLOCAL; | |
8873aaa6 AC |
944 | tty->termios->c_ispeed = 9600; |
945 | tty->termios->c_ospeed = 9600; | |
1da177e4 LT |
946 | } |
947 | priv->termios_initialized = 1; | |
948 | } | |
949 | spin_unlock_irqrestore(&priv->lock, flags); | |
950 | ||
8873aaa6 AC |
951 | /* Unsupported features need clearing */ |
952 | tty->termios->c_cflag &= ~(CMSPAR|CRTSCTS); | |
953 | ||
1da177e4 LT |
954 | cflag = tty->termios->c_cflag; |
955 | iflag = tty->termios->c_iflag; | |
956 | ||
957 | /* check if there are new settings */ | |
958 | if (old_termios) { | |
8873aaa6 AC |
959 | spin_lock_irqsave(&priv->lock, flags); |
960 | priv->tmp_termios = *(tty->termios); | |
961 | spin_unlock_irqrestore(&priv->lock, flags); | |
962 | } | |
1da177e4 LT |
963 | |
964 | /* set number of data bits, parity, stop bits */ | |
965 | /* when parity is disabled the parity type bit is ignored */ | |
966 | ||
b9db07fb LM |
967 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
968 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
969 | ||
1da177e4 LT |
970 | if (cflag & PARENB) { |
971 | parity_enable = 1; | |
b9db07fb LM |
972 | /* 1 means odd parity, 0 means even parity */ |
973 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
974 | } else |
975 | parity_enable = parity_type = 0; | |
976 | ||
77336828 AC |
977 | switch (cflag & CSIZE) { |
978 | case CS5: | |
979 | data_bits = 0; | |
980 | break; | |
981 | case CS6: | |
982 | data_bits = 1; | |
983 | break; | |
984 | case CS7: | |
985 | data_bits = 2; | |
986 | break; | |
987 | case CS8: | |
1da177e4 | 988 | data_bits = 3; |
77336828 AC |
989 | break; |
990 | default: | |
dfa1c315 | 991 | dev_err(dev, "%s - CSIZE was set, but not CS5-CS8\n", __func__); |
77336828 AC |
992 | data_bits = 3; |
993 | } | |
1da177e4 LT |
994 | spin_lock_irqsave(&priv->lock, flags); |
995 | oldlines = priv->line_control; | |
996 | if ((cflag & CBAUD) == B0) { | |
997 | /* drop dtr and rts */ | |
dfa1c315 | 998 | dev_dbg(dev, "%s - dropping the lines, baud rate 0bps\n", __func__); |
1da177e4 | 999 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 1000 | } else |
3cb4a4f7 | 1001 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 1002 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1003 | |
dfa1c315 GKH |
1004 | dev_dbg(dev, "%s - sending %d stop_bits, %d parity_enable, %d parity_type, %d data_bits (+5)\n", |
1005 | __func__, stop_bits, parity_enable, parity_type, data_bits); | |
b9db07fb | 1006 | |
813a224f AC |
1007 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
1008 | data_bits, stop_bits, | |
1009 | parity_enable, parity_type, | |
1010 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1011 | |
b9db07fb LM |
1012 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1013 | * filled into the private structure this should confirm that all is | |
1014 | * working if it returns what we just set */ | |
95da310e | 1015 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 1016 | |
b9db07fb LM |
1017 | /* Here we can define custom tty settings for devices; the main tty |
1018 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1019 | |
b9db07fb | 1020 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 1021 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
dfa1c315 | 1022 | dev_dbg(dev, "Using custom termios settings for a baud rate of 4800bps.\n"); |
1da177e4 LT |
1023 | /* define custom termios settings for NMEA protocol */ |
1024 | ||
1da177e4 | 1025 | tty->termios->c_iflag /* input modes - */ |
b9db07fb LM |
1026 | &= ~(IGNBRK /* disable ignore break */ |
1027 | | BRKINT /* disable break causes interrupt */ | |
1028 | | PARMRK /* disable mark parity errors */ | |
1029 | | ISTRIP /* disable clear high bit of input char */ | |
1030 | | INLCR /* disable translate NL to CR */ | |
1031 | | IGNCR /* disable ignore CR */ | |
1032 | | ICRNL /* disable translate CR to NL */ | |
1033 | | IXON); /* disable enable XON/XOFF flow control */ | |
1034 | ||
1da177e4 | 1035 | tty->termios->c_oflag /* output modes */ |
b9db07fb | 1036 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1037 | |
b9db07fb LM |
1038 | tty->termios->c_lflag /* line discipline modes */ |
1039 | &= ~(ECHO /* disable echo input characters */ | |
1040 | | ECHONL /* disable echo new line */ | |
1041 | | ICANON /* disable erase, kill, werase, and rprnt | |
1042 | special characters */ | |
1043 | | ISIG /* disable interrupt, quit, and suspend | |
1044 | special characters */ | |
1045 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1046 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1047 | |
1da177e4 LT |
1048 | linechange = (priv->line_control != oldlines); |
1049 | spin_unlock_irqrestore(&priv->lock, flags); | |
1050 | ||
1051 | /* if necessary, set lines */ | |
3cb4a4f7 | 1052 | if (linechange) { |
1da177e4 | 1053 | priv->cmd_ctrl = 1; |
95da310e | 1054 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1055 | } |
1da177e4 LT |
1056 | } /* cypress_set_termios */ |
1057 | ||
b9db07fb | 1058 | |
1da177e4 | 1059 | /* returns amount of data still left in soft buffer */ |
95da310e | 1060 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1061 | { |
95da310e | 1062 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1063 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1064 | int chars = 0; | |
1065 | unsigned long flags; | |
1066 | ||
1da177e4 | 1067 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 1068 | chars = kfifo_len(&priv->write_fifo); |
1da177e4 LT |
1069 | spin_unlock_irqrestore(&priv->lock, flags); |
1070 | ||
dfa1c315 | 1071 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
1da177e4 LT |
1072 | return chars; |
1073 | } | |
1074 | ||
1075 | ||
95da310e | 1076 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1077 | { |
95da310e | 1078 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1079 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1da177e4 | 1080 | |
63832515 | 1081 | spin_lock_irq(&priv->lock); |
1da177e4 | 1082 | priv->rx_flags = THROTTLED; |
63832515 | 1083 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
1084 | } |
1085 | ||
1086 | ||
95da310e | 1087 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1088 | { |
95da310e | 1089 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1090 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1091 | int actually_throttled, result; | |
1da177e4 | 1092 | |
63832515 | 1093 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
1094 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
1095 | priv->rx_flags = 0; | |
63832515 | 1096 | spin_unlock_irq(&priv->lock); |
1da177e4 | 1097 | |
78aef519 MI |
1098 | if (!priv->comm_is_ok) |
1099 | return; | |
1100 | ||
1da177e4 | 1101 | if (actually_throttled) { |
63832515 | 1102 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
78aef519 | 1103 | if (result) { |
b9db07fb | 1104 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1105 | "error %d\n", __func__, result); |
78aef519 MI |
1106 | cypress_set_dead(port); |
1107 | } | |
1da177e4 LT |
1108 | } |
1109 | } | |
1110 | ||
1111 | ||
7d12e780 | 1112 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1113 | { |
cdc97792 | 1114 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1115 | struct cypress_private *priv = usb_get_serial_port_data(port); |
dfa1c315 | 1116 | struct device *dev = &urb->dev->dev; |
1da177e4 LT |
1117 | struct tty_struct *tty; |
1118 | unsigned char *data = urb->transfer_buffer; | |
1119 | unsigned long flags; | |
b9db07fb | 1120 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1121 | int havedata = 0; |
1122 | int bytes = 0; | |
1123 | int result; | |
1124 | int i = 0; | |
8d7bc55e | 1125 | int status = urb->status; |
1da177e4 | 1126 | |
8d7bc55e | 1127 | switch (status) { |
78aef519 MI |
1128 | case 0: /* success */ |
1129 | break; | |
1130 | case -ECONNRESET: | |
1131 | case -ENOENT: | |
1132 | case -ESHUTDOWN: | |
1133 | /* precursor to disconnect so just go away */ | |
1134 | return; | |
1135 | case -EPIPE: | |
4d2fae8b AS |
1136 | /* Can't call usb_clear_halt while in_interrupt */ |
1137 | /* FALLS THROUGH */ | |
78aef519 MI |
1138 | default: |
1139 | /* something ugly is going on... */ | |
dfa1c315 GKH |
1140 | dev_err(dev, "%s - unexpected nonzero read status received: %d\n", |
1141 | __func__, status); | |
78aef519 | 1142 | cypress_set_dead(port); |
1da177e4 LT |
1143 | return; |
1144 | } | |
1145 | ||
1146 | spin_lock_irqsave(&priv->lock, flags); | |
1147 | if (priv->rx_flags & THROTTLED) { | |
dfa1c315 | 1148 | dev_dbg(dev, "%s - now throttling\n", __func__); |
1da177e4 LT |
1149 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1150 | spin_unlock_irqrestore(&priv->lock, flags); | |
1151 | return; | |
1152 | } | |
1153 | spin_unlock_irqrestore(&priv->lock, flags); | |
1154 | ||
4a90f09b | 1155 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1156 | if (!tty) { |
dfa1c315 | 1157 | dev_dbg(dev, "%s - bad tty pointer - exiting\n", __func__); |
1da177e4 LT |
1158 | return; |
1159 | } | |
1160 | ||
1161 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1162 | result = urb->actual_length; |
1163 | switch (priv->pkt_fmt) { | |
1164 | default: | |
1165 | case packet_format_1: | |
1166 | /* This is for the CY7C64013... */ | |
1167 | priv->current_status = data[0] & 0xF8; | |
1168 | bytes = data[1] + 2; | |
1169 | i = 2; | |
1170 | if (bytes > 2) | |
1171 | havedata = 1; | |
1172 | break; | |
1173 | case packet_format_2: | |
1174 | /* This is for the CY7C63743... */ | |
1175 | priv->current_status = data[0] & 0xF8; | |
1176 | bytes = (data[0] & 0x07) + 1; | |
1177 | i = 1; | |
1178 | if (bytes > 1) | |
1179 | havedata = 1; | |
1180 | break; | |
1da177e4 LT |
1181 | } |
1182 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 | 1183 | if (result < bytes) { |
dfa1c315 GKH |
1184 | dev_dbg(dev, |
1185 | "%s - wrong packet size - received %d bytes but packet said %d bytes\n", | |
1186 | __func__, result, bytes); | |
3416eaa1 MI |
1187 | goto continue_read; |
1188 | } | |
1da177e4 | 1189 | |
813a224f AC |
1190 | usb_serial_debug_data(debug, &port->dev, __func__, |
1191 | urb->actual_length, data); | |
1da177e4 LT |
1192 | |
1193 | spin_lock_irqsave(&priv->lock, flags); | |
1194 | /* check to see if status has changed */ | |
6768306c MI |
1195 | if (priv->current_status != priv->prev_status) { |
1196 | priv->diff_status |= priv->current_status ^ | |
1197 | priv->prev_status; | |
1198 | wake_up_interruptible(&priv->delta_msr_wait); | |
1199 | priv->prev_status = priv->current_status; | |
1da177e4 | 1200 | } |
b9db07fb | 1201 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1202 | |
b9db07fb LM |
1203 | /* hangup, as defined in acm.c... this might be a bad place for it |
1204 | * though */ | |
1205 | if (tty && !(tty->termios->c_cflag & CLOCAL) && | |
1206 | !(priv->current_status & UART_CD)) { | |
dfa1c315 | 1207 | dev_dbg(dev, "%s - calling hangup\n", __func__); |
1da177e4 LT |
1208 | tty_hangup(tty); |
1209 | goto continue_read; | |
1210 | } | |
1211 | ||
b9db07fb LM |
1212 | /* There is one error bit... I'm assuming it is a parity error |
1213 | * indicator as the generic firmware will set this bit to 1 if a | |
1214 | * parity error occurs. | |
1215 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1216 | spin_lock_irqsave(&priv->lock, flags); |
1217 | if (priv->current_status & CYP_ERROR) { | |
1218 | spin_unlock_irqrestore(&priv->lock, flags); | |
1219 | tty_flag = TTY_PARITY; | |
dfa1c315 | 1220 | dev_dbg(dev, "%s - Parity Error detected\n", __func__); |
1da177e4 LT |
1221 | } else |
1222 | spin_unlock_irqrestore(&priv->lock, flags); | |
1223 | ||
1224 | /* process read if there is data other than line status */ | |
a108bfcb AC |
1225 | if (tty && bytes > i) { |
1226 | tty_insert_flip_string_fixed_flag(tty, data + i, | |
70ced221 | 1227 | tty_flag, bytes - i); |
4a90f09b | 1228 | tty_flip_buffer_push(tty); |
1da177e4 LT |
1229 | } |
1230 | ||
1231 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1232 | /* control and status byte(s) are also counted */ |
1233 | priv->bytes_in += bytes; | |
1da177e4 LT |
1234 | spin_unlock_irqrestore(&priv->lock, flags); |
1235 | ||
1236 | continue_read: | |
4a90f09b | 1237 | tty_kref_put(tty); |
b9db07fb | 1238 | |
1f87158e | 1239 | /* Continue trying to always read */ |
1da177e4 | 1240 | |
1f87158e | 1241 | if (priv->comm_is_ok) { |
b9db07fb LM |
1242 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1243 | usb_rcvintpipe(port->serial->dev, | |
1244 | port->interrupt_in_endpointAddress), | |
1245 | port->interrupt_in_urb->transfer_buffer, | |
1246 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1247 | cypress_read_int_callback, port, |
1248 | priv->read_urb_interval); | |
b9db07fb | 1249 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
1f87158e | 1250 | if (result && result != -EPERM) { |
dfa1c315 GKH |
1251 | dev_err(dev, "%s - failed resubmitting read urb, error %d\n", |
1252 | __func__, result); | |
78aef519 MI |
1253 | cypress_set_dead(port); |
1254 | } | |
1da177e4 | 1255 | } |
1da177e4 LT |
1256 | } /* cypress_read_int_callback */ |
1257 | ||
1258 | ||
7d12e780 | 1259 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1260 | { |
cdc97792 | 1261 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1262 | struct cypress_private *priv = usb_get_serial_port_data(port); |
dfa1c315 | 1263 | struct device *dev = &urb->dev->dev; |
1da177e4 | 1264 | int result; |
8d7bc55e | 1265 | int status = urb->status; |
1da177e4 | 1266 | |
8d7bc55e | 1267 | switch (status) { |
813a224f AC |
1268 | case 0: |
1269 | /* success */ | |
1270 | break; | |
1271 | case -ECONNRESET: | |
1272 | case -ENOENT: | |
1273 | case -ESHUTDOWN: | |
1274 | /* this urb is terminated, clean up */ | |
dfa1c315 GKH |
1275 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", |
1276 | __func__, status); | |
813a224f AC |
1277 | priv->write_urb_in_use = 0; |
1278 | return; | |
1279 | case -EPIPE: /* no break needed; clear halt and resubmit */ | |
1280 | if (!priv->comm_is_ok) | |
1da177e4 | 1281 | break; |
813a224f AC |
1282 | usb_clear_halt(port->serial->dev, 0x02); |
1283 | /* error in the urb, so we have to resubmit it */ | |
dfa1c315 | 1284 | dev_dbg(dev, "%s - nonzero write bulk status received: %d\n", |
813a224f AC |
1285 | __func__, status); |
1286 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
813a224f AC |
1287 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1288 | if (!result) | |
1da177e4 | 1289 | return; |
dfa1c315 GKH |
1290 | dev_err(dev, "%s - failed resubmitting write urb, error %d\n", |
1291 | __func__, result); | |
813a224f AC |
1292 | cypress_set_dead(port); |
1293 | break; | |
1294 | default: | |
dfa1c315 GKH |
1295 | dev_err(dev, "%s - unexpected nonzero write status received: %d\n", |
1296 | __func__, status); | |
813a224f AC |
1297 | cypress_set_dead(port); |
1298 | break; | |
1da177e4 | 1299 | } |
1da177e4 | 1300 | priv->write_urb_in_use = 0; |
813a224f | 1301 | |
1da177e4 LT |
1302 | /* send any buffered data */ |
1303 | cypress_send(port); | |
1304 | } | |
1305 | ||
68e24113 | 1306 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1307 | |
813a224f AC |
1308 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1309 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1310 | MODULE_VERSION(DRIVER_VERSION); | |
1da177e4 LT |
1311 | MODULE_LICENSE("GPL"); |
1312 | ||
1313 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1314 | MODULE_PARM_DESC(debug, "Debug enabled or not"); | |
1315 | module_param(stats, bool, S_IRUGO | S_IWUSR); | |
1316 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1317 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1318 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); | |
c312659c MF |
1319 | module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR); |
1320 | MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates"); |