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 | 49 | static bool stats; |
3cb4a4f7 | 50 | static int interval; |
90ab5ee9 | 51 | static bool unstable_bauds; |
1da177e4 | 52 | |
1da177e4 LT |
53 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
54 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
55 | ||
56 | /* write buffer size defines */ | |
57 | #define CYPRESS_BUF_SIZE 1024 | |
1da177e4 | 58 | |
7d40d7e8 | 59 | static const struct usb_device_id id_table_earthmate[] = { |
1da177e4 | 60 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 61 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
62 | { } /* Terminating entry */ |
63 | }; | |
64 | ||
7d40d7e8 | 65 | static const struct usb_device_id id_table_cyphidcomrs232[] = { |
1da177e4 | 66 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 67 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
1da177e4 LT |
68 | { } /* Terminating entry */ |
69 | }; | |
70 | ||
7d40d7e8 | 71 | static const struct usb_device_id id_table_nokiaca42v2[] = { |
a5c44e29 LM |
72 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
73 | { } /* Terminating entry */ | |
74 | }; | |
75 | ||
7d40d7e8 | 76 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 | 77 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 78 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 79 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 80 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
a5c44e29 | 81 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
82 | { } /* Terminating entry */ |
83 | }; | |
84 | ||
813a224f | 85 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 86 | |
3416eaa1 MI |
87 | enum packet_format { |
88 | packet_format_1, /* b0:status, b1:payload count */ | |
89 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
90 | }; | |
91 | ||
1da177e4 LT |
92 | struct cypress_private { |
93 | spinlock_t lock; /* private lock */ | |
94 | int chiptype; /* identifier of device, for quirks/etc */ | |
95 | int bytes_in; /* used for statistics */ | |
96 | int bytes_out; /* used for statistics */ | |
97 | int cmd_count; /* used for statistics */ | |
98 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
117fb8d0 | 99 | struct kfifo write_fifo; /* write fifo */ |
1da177e4 | 100 | int write_urb_in_use; /* write urb in use indicator */ |
0257fa9f MI |
101 | int write_urb_interval; /* interval to use for write urb */ |
102 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 103 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
104 | int termios_initialized; |
105 | __u8 line_control; /* holds dtr / rts value */ | |
106 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
107 | __u8 current_config; /* stores the current configuration byte */ | |
108 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 109 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 110 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
111 | int baud_rate; /* stores current baud rate in |
112 | integer form */ | |
1da177e4 | 113 | int isthrottled; /* if throttled, discard reads */ |
1da177e4 | 114 | char prev_status, diff_status; /* used for TIOCMIWAIT */ |
3ad2f3fb | 115 | /* we pass a pointer to this as the argument sent to |
813a224f | 116 | cypress_set_termios old_termios */ |
606d099c | 117 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
118 | }; |
119 | ||
1da177e4 | 120 | /* function prototypes for the Cypress USB to serial device */ |
5c1a0f41 JH |
121 | static int cypress_earthmate_port_probe(struct usb_serial_port *port); |
122 | static int cypress_hidcom_port_probe(struct usb_serial_port *port); | |
123 | static int cypress_ca42v2_port_probe(struct usb_serial_port *port); | |
124 | static int cypress_port_remove(struct usb_serial_port *port); | |
a509a7e4 | 125 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
126 | static void cypress_close(struct usb_serial_port *port); |
127 | static void cypress_dtr_rts(struct usb_serial_port *port, int on); | |
813a224f AC |
128 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
129 | const unsigned char *buf, int count); | |
130 | static void cypress_send(struct usb_serial_port *port); | |
131 | static int cypress_write_room(struct tty_struct *tty); | |
00a0d0d6 | 132 | static int cypress_ioctl(struct tty_struct *tty, |
813a224f AC |
133 | unsigned int cmd, unsigned long arg); |
134 | static void cypress_set_termios(struct tty_struct *tty, | |
135 | struct usb_serial_port *port, struct ktermios *old); | |
60b33c13 | 136 | static int cypress_tiocmget(struct tty_struct *tty); |
20b9d177 | 137 | static int cypress_tiocmset(struct tty_struct *tty, |
813a224f AC |
138 | unsigned int set, unsigned int clear); |
139 | static int cypress_chars_in_buffer(struct tty_struct *tty); | |
140 | static void cypress_throttle(struct tty_struct *tty); | |
141 | static void cypress_unthrottle(struct tty_struct *tty); | |
142 | static void cypress_set_dead(struct usb_serial_port *port); | |
143 | static void cypress_read_int_callback(struct urb *urb); | |
144 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 | 145 | |
ea65370d | 146 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
147 | .driver = { |
148 | .owner = THIS_MODULE, | |
269bda1c | 149 | .name = "earthmate", |
18fcac35 | 150 | }, |
269bda1c | 151 | .description = "DeLorme Earthmate USB", |
1da177e4 | 152 | .id_table = id_table_earthmate, |
1da177e4 | 153 | .num_ports = 1, |
5c1a0f41 JH |
154 | .port_probe = cypress_earthmate_port_probe, |
155 | .port_remove = cypress_port_remove, | |
1da177e4 LT |
156 | .open = cypress_open, |
157 | .close = cypress_close, | |
335f8514 | 158 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
159 | .write = cypress_write, |
160 | .write_room = cypress_write_room, | |
161 | .ioctl = cypress_ioctl, | |
162 | .set_termios = cypress_set_termios, | |
163 | .tiocmget = cypress_tiocmget, | |
164 | .tiocmset = cypress_tiocmset, | |
165 | .chars_in_buffer = cypress_chars_in_buffer, | |
166 | .throttle = cypress_throttle, | |
167 | .unthrottle = cypress_unthrottle, | |
168 | .read_int_callback = cypress_read_int_callback, | |
169 | .write_int_callback = cypress_write_int_callback, | |
170 | }; | |
171 | ||
ea65370d | 172 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
173 | .driver = { |
174 | .owner = THIS_MODULE, | |
269bda1c | 175 | .name = "cyphidcom", |
18fcac35 | 176 | }, |
269bda1c | 177 | .description = "HID->COM RS232 Adapter", |
1da177e4 | 178 | .id_table = id_table_cyphidcomrs232, |
1da177e4 | 179 | .num_ports = 1, |
5c1a0f41 JH |
180 | .port_probe = cypress_hidcom_port_probe, |
181 | .port_remove = cypress_port_remove, | |
1da177e4 LT |
182 | .open = cypress_open, |
183 | .close = cypress_close, | |
335f8514 | 184 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
185 | .write = cypress_write, |
186 | .write_room = cypress_write_room, | |
187 | .ioctl = cypress_ioctl, | |
188 | .set_termios = cypress_set_termios, | |
189 | .tiocmget = cypress_tiocmget, | |
190 | .tiocmset = cypress_tiocmset, | |
191 | .chars_in_buffer = cypress_chars_in_buffer, | |
192 | .throttle = cypress_throttle, | |
193 | .unthrottle = cypress_unthrottle, | |
194 | .read_int_callback = cypress_read_int_callback, | |
195 | .write_int_callback = cypress_write_int_callback, | |
196 | }; | |
197 | ||
a5c44e29 LM |
198 | static struct usb_serial_driver cypress_ca42v2_device = { |
199 | .driver = { | |
200 | .owner = THIS_MODULE, | |
813a224f | 201 | .name = "nokiaca42v2", |
a5c44e29 LM |
202 | }, |
203 | .description = "Nokia CA-42 V2 Adapter", | |
204 | .id_table = id_table_nokiaca42v2, | |
a5c44e29 | 205 | .num_ports = 1, |
5c1a0f41 JH |
206 | .port_probe = cypress_ca42v2_port_probe, |
207 | .port_remove = cypress_port_remove, | |
a5c44e29 LM |
208 | .open = cypress_open, |
209 | .close = cypress_close, | |
335f8514 | 210 | .dtr_rts = cypress_dtr_rts, |
a5c44e29 LM |
211 | .write = cypress_write, |
212 | .write_room = cypress_write_room, | |
213 | .ioctl = cypress_ioctl, | |
214 | .set_termios = cypress_set_termios, | |
215 | .tiocmget = cypress_tiocmget, | |
216 | .tiocmset = cypress_tiocmset, | |
217 | .chars_in_buffer = cypress_chars_in_buffer, | |
218 | .throttle = cypress_throttle, | |
219 | .unthrottle = cypress_unthrottle, | |
220 | .read_int_callback = cypress_read_int_callback, | |
221 | .write_int_callback = cypress_write_int_callback, | |
222 | }; | |
1da177e4 | 223 | |
08a4f6bc AS |
224 | static struct usb_serial_driver * const serial_drivers[] = { |
225 | &cypress_earthmate_device, &cypress_hidcom_device, | |
226 | &cypress_ca42v2_device, NULL | |
227 | }; | |
228 | ||
1da177e4 LT |
229 | /***************************************************************************** |
230 | * Cypress serial helper functions | |
231 | *****************************************************************************/ | |
232 | ||
233 | ||
8873aaa6 | 234 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 235 | { |
92983c21 MI |
236 | struct cypress_private *priv; |
237 | priv = usb_get_serial_port_data(port); | |
238 | ||
c312659c MF |
239 | if (unstable_bauds) |
240 | return new_rate; | |
241 | ||
92983c21 MI |
242 | /* |
243 | * The general purpose firmware for the Cypress M8 allows for | |
244 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
245 | * chose to use the general purpose firmware or not), if you | |
246 | * need to modify this speed setting for your own project | |
247 | * please add your own chiptype and modify the code likewise. | |
248 | * The Cypress HID->COM device will work successfully up to | |
249 | * 115200bps (but the actual throughput is around 3kBps). | |
250 | */ | |
92983c21 MI |
251 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
252 | /* | |
253 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
254 | * Cypress app note that describes this mechanism | |
255 | * states the the low-speed part can't handle more | |
256 | * than 800 bytes/sec, in which case 4800 baud is the | |
257 | * safest speed for a part like that. | |
258 | */ | |
259 | if (new_rate > 4800) { | |
dfa1c315 GKH |
260 | dev_dbg(&port->dev, |
261 | "%s - failed setting baud rate, device incapable speed %d\n", | |
262 | __func__, new_rate); | |
92983c21 MI |
263 | return -1; |
264 | } | |
265 | } | |
266 | switch (priv->chiptype) { | |
267 | case CT_EARTHMATE: | |
268 | if (new_rate <= 600) { | |
269 | /* 300 and 600 baud rates are supported under | |
270 | * the generic firmware, but are not used with | |
271 | * NMEA and SiRF protocols */ | |
dfa1c315 GKH |
272 | dev_dbg(&port->dev, |
273 | "%s - failed setting baud rate, unsupported speed of %d on Earthmate GPS", | |
274 | __func__, new_rate); | |
92983c21 MI |
275 | return -1; |
276 | } | |
277 | break; | |
278 | default: | |
279 | break; | |
280 | } | |
281 | return new_rate; | |
282 | } | |
283 | ||
284 | ||
093cf723 | 285 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 286 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
287 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
288 | int stop_bits, int parity_enable, int parity_type, int reset, | |
289 | int cypress_request_type) | |
1da177e4 | 290 | { |
3cb4a4f7 | 291 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 292 | struct cypress_private *priv; |
dfa1c315 | 293 | struct device *dev = &port->dev; |
0954644b JH |
294 | u8 *feature_buffer; |
295 | const unsigned int feature_len = 5; | |
1da177e4 LT |
296 | unsigned long flags; |
297 | ||
1da177e4 LT |
298 | priv = usb_get_serial_port_data(port); |
299 | ||
78aef519 MI |
300 | if (!priv->comm_is_ok) |
301 | return -ENODEV; | |
302 | ||
0954644b JH |
303 | feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL); |
304 | if (!feature_buffer) | |
305 | return -ENOMEM; | |
306 | ||
813a224f AC |
307 | switch (cypress_request_type) { |
308 | case CYPRESS_SET_CONFIG: | |
813a224f | 309 | /* 0 means 'Hang up' so doesn't change the true bit rate */ |
2805eb13 MF |
310 | new_baudrate = priv->baud_rate; |
311 | if (baud_rate && baud_rate != priv->baud_rate) { | |
dfa1c315 | 312 | dev_dbg(dev, "%s - baud rate is changing\n", __func__); |
813a224f | 313 | retval = analyze_baud_rate(port, baud_rate); |
2805eb13 | 314 | if (retval >= 0) { |
813a224f | 315 | new_baudrate = retval; |
dfa1c315 GKH |
316 | dev_dbg(dev, "%s - New baud rate set to %d\n", |
317 | __func__, new_baudrate); | |
1da177e4 | 318 | } |
813a224f | 319 | } |
dfa1c315 GKH |
320 | dev_dbg(dev, "%s - baud rate is being sent as %d\n", __func__, |
321 | new_baudrate); | |
813a224f | 322 | |
813a224f | 323 | /* fill the feature_buffer with new configuration */ |
0f2c2d7b | 324 | put_unaligned_le32(new_baudrate, feature_buffer); |
813a224f AC |
325 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
326 | /* 1 bit gap */ | |
327 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
328 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
329 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
330 | /* 1 bit gap */ | |
331 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
332 | ||
dfa1c315 GKH |
333 | dev_dbg(dev, "%s - device is being sent this feature report:\n", __func__); |
334 | dev_dbg(dev, "%s - %02X - %02X - %02X - %02X - %02X\n", __func__, | |
813a224f AC |
335 | feature_buffer[0], feature_buffer[1], |
336 | feature_buffer[2], feature_buffer[3], | |
337 | feature_buffer[4]); | |
338 | ||
339 | do { | |
340 | retval = usb_control_msg(port->serial->dev, | |
341 | usb_sndctrlpipe(port->serial->dev, 0), | |
342 | HID_REQ_SET_REPORT, | |
343 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
344 | 0x0300, 0, feature_buffer, | |
0954644b | 345 | feature_len, 500); |
813a224f AC |
346 | |
347 | if (tries++ >= 3) | |
348 | break; | |
349 | ||
0954644b | 350 | } while (retval != feature_len && |
813a224f AC |
351 | retval != -ENODEV); |
352 | ||
0954644b | 353 | if (retval != feature_len) { |
dfa1c315 GKH |
354 | dev_err(dev, "%s - failed sending serial line settings - %d\n", |
355 | __func__, retval); | |
813a224f AC |
356 | cypress_set_dead(port); |
357 | } else { | |
358 | spin_lock_irqsave(&priv->lock, flags); | |
359 | priv->baud_rate = new_baudrate; | |
360 | priv->current_config = feature_buffer[4]; | |
361 | spin_unlock_irqrestore(&priv->lock, flags); | |
362 | /* If we asked for a speed change encode it */ | |
363 | if (baud_rate) | |
364 | tty_encode_baud_rate(tty, | |
365 | new_baudrate, new_baudrate); | |
366 | } | |
367 | break; | |
368 | case CYPRESS_GET_CONFIG: | |
369 | if (priv->get_cfg_unsafe) { | |
370 | /* Not implemented for this device, | |
371 | and if we try to do it we're likely | |
372 | to crash the hardware. */ | |
0954644b JH |
373 | retval = -ENOTTY; |
374 | goto out; | |
813a224f | 375 | } |
dfa1c315 | 376 | dev_dbg(dev, "%s - retreiving serial line settings\n", __func__); |
813a224f AC |
377 | do { |
378 | retval = usb_control_msg(port->serial->dev, | |
379 | usb_rcvctrlpipe(port->serial->dev, 0), | |
380 | HID_REQ_GET_REPORT, | |
381 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
382 | 0x0300, 0, feature_buffer, | |
0954644b | 383 | feature_len, 500); |
813a224f AC |
384 | |
385 | if (tries++ >= 3) | |
386 | break; | |
0954644b | 387 | } while (retval != feature_len |
813a224f AC |
388 | && retval != -ENODEV); |
389 | ||
0954644b | 390 | if (retval != feature_len) { |
dfa1c315 GKH |
391 | dev_err(dev, "%s - failed to retrieve serial line settings - %d\n", |
392 | __func__, retval); | |
813a224f | 393 | cypress_set_dead(port); |
0954644b | 394 | goto out; |
813a224f AC |
395 | } else { |
396 | spin_lock_irqsave(&priv->lock, flags); | |
397 | /* store the config in one byte, and later | |
398 | use bit masks to check values */ | |
399 | priv->current_config = feature_buffer[4]; | |
0f2c2d7b | 400 | priv->baud_rate = get_unaligned_le32(feature_buffer); |
813a224f AC |
401 | spin_unlock_irqrestore(&priv->lock, flags); |
402 | } | |
1da177e4 | 403 | } |
3cb4a4f7 LM |
404 | spin_lock_irqsave(&priv->lock, flags); |
405 | ++priv->cmd_count; | |
406 | spin_unlock_irqrestore(&priv->lock, flags); | |
0954644b JH |
407 | out: |
408 | kfree(feature_buffer); | |
1da177e4 LT |
409 | return retval; |
410 | } /* cypress_serial_control */ | |
411 | ||
412 | ||
78aef519 MI |
413 | static void cypress_set_dead(struct usb_serial_port *port) |
414 | { | |
415 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
416 | unsigned long flags; | |
417 | ||
418 | spin_lock_irqsave(&priv->lock, flags); | |
419 | if (!priv->comm_is_ok) { | |
420 | spin_unlock_irqrestore(&priv->lock, flags); | |
421 | return; | |
422 | } | |
423 | priv->comm_is_ok = 0; | |
424 | spin_unlock_irqrestore(&priv->lock, flags); | |
425 | ||
194343d9 GKH |
426 | dev_err(&port->dev, "cypress_m8 suspending failing port %d - " |
427 | "interval might be too short\n", port->number); | |
78aef519 MI |
428 | } |
429 | ||
430 | ||
1da177e4 LT |
431 | /***************************************************************************** |
432 | * Cypress serial driver functions | |
433 | *****************************************************************************/ | |
434 | ||
435 | ||
5c1a0f41 | 436 | static int cypress_generic_port_probe(struct usb_serial_port *port) |
1da177e4 | 437 | { |
5c1a0f41 | 438 | struct usb_serial *serial = port->serial; |
1da177e4 LT |
439 | struct cypress_private *priv; |
440 | ||
813a224f | 441 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
442 | if (!priv) |
443 | return -ENOMEM; | |
444 | ||
78aef519 | 445 | priv->comm_is_ok = !0; |
1da177e4 | 446 | spin_lock_init(&priv->lock); |
117fb8d0 | 447 | if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) { |
1da177e4 LT |
448 | kfree(priv); |
449 | return -ENOMEM; | |
450 | } | |
813a224f AC |
451 | |
452 | usb_reset_configuration(serial->dev); | |
453 | ||
1da177e4 LT |
454 | priv->cmd_ctrl = 0; |
455 | priv->line_control = 0; | |
456 | priv->termios_initialized = 0; | |
1da177e4 | 457 | priv->rx_flags = 0; |
3416eaa1 MI |
458 | /* Default packet format setting is determined by packet size. |
459 | Anything with a size larger then 9 must have a separate | |
460 | count field since the 3 bit count field is otherwise too | |
461 | small. Otherwise we can use the slightly more compact | |
462 | format. This is in accordance with the cypress_m8 serial | |
463 | converter app note. */ | |
813a224f | 464 | if (port->interrupt_out_size > 9) |
3416eaa1 | 465 | priv->pkt_fmt = packet_format_1; |
813a224f | 466 | else |
3416eaa1 | 467 | priv->pkt_fmt = packet_format_2; |
813a224f | 468 | |
0257fa9f MI |
469 | if (interval > 0) { |
470 | priv->write_urb_interval = interval; | |
471 | priv->read_urb_interval = interval; | |
dfa1c315 GKH |
472 | dev_dbg(&port->dev, "%s - read & write intervals forced to %d\n", |
473 | __func__, interval); | |
0257fa9f MI |
474 | } else { |
475 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
476 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
dfa1c315 GKH |
477 | dev_dbg(&port->dev, "%s - intervals: read=%d write=%d\n", |
478 | __func__, priv->read_urb_interval, | |
479 | priv->write_urb_interval); | |
0257fa9f MI |
480 | } |
481 | usb_set_serial_port_data(port, priv); | |
813a224f | 482 | |
b9db07fb LM |
483 | return 0; |
484 | } | |
1da177e4 LT |
485 | |
486 | ||
5c1a0f41 | 487 | static int cypress_earthmate_port_probe(struct usb_serial_port *port) |
1da177e4 | 488 | { |
5c1a0f41 | 489 | struct usb_serial *serial = port->serial; |
1da177e4 | 490 | struct cypress_private *priv; |
5c1a0f41 | 491 | int ret; |
1da177e4 | 492 | |
5c1a0f41 JH |
493 | ret = cypress_generic_port_probe(port); |
494 | if (ret) { | |
dfa1c315 | 495 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 496 | return ret; |
1da177e4 LT |
497 | } |
498 | ||
3d6aa320 | 499 | priv = usb_get_serial_port_data(port); |
1da177e4 | 500 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
501 | /* All Earthmate devices use the separated-count packet |
502 | format! Idiotic. */ | |
503 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
504 | if (serial->dev->descriptor.idProduct != |
505 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
506 | /* The old original USB Earthmate seemed able to |
507 | handle GET_CONFIG requests; everything they've | |
508 | produced since that time crashes if this command is | |
509 | attempted :-( */ | |
dfa1c315 GKH |
510 | dev_dbg(&port->dev, |
511 | "%s - Marking this device as unsafe for GET_CONFIG commands\n", | |
512 | __func__); | |
3d6aa320 MI |
513 | priv->get_cfg_unsafe = !0; |
514 | } | |
b9db07fb LM |
515 | |
516 | return 0; | |
5c1a0f41 | 517 | } |
1da177e4 | 518 | |
5c1a0f41 | 519 | static int cypress_hidcom_port_probe(struct usb_serial_port *port) |
1da177e4 LT |
520 | { |
521 | struct cypress_private *priv; | |
5c1a0f41 | 522 | int ret; |
1da177e4 | 523 | |
5c1a0f41 JH |
524 | ret = cypress_generic_port_probe(port); |
525 | if (ret) { | |
dfa1c315 | 526 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 527 | return ret; |
1da177e4 LT |
528 | } |
529 | ||
dfa1c315 | 530 | priv = usb_get_serial_port_data(port); |
1da177e4 | 531 | priv->chiptype = CT_CYPHIDCOM; |
813a224f | 532 | |
b9db07fb | 533 | return 0; |
5c1a0f41 | 534 | } |
1da177e4 | 535 | |
5c1a0f41 | 536 | static int cypress_ca42v2_port_probe(struct usb_serial_port *port) |
a5c44e29 LM |
537 | { |
538 | struct cypress_private *priv; | |
5c1a0f41 | 539 | int ret; |
a5c44e29 | 540 | |
5c1a0f41 JH |
541 | ret = cypress_generic_port_probe(port); |
542 | if (ret) { | |
dfa1c315 | 543 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 544 | return ret; |
a5c44e29 LM |
545 | } |
546 | ||
dfa1c315 | 547 | priv = usb_get_serial_port_data(port); |
a5c44e29 LM |
548 | priv->chiptype = CT_CA42V2; |
549 | ||
550 | return 0; | |
5c1a0f41 | 551 | } |
a5c44e29 | 552 | |
5c1a0f41 | 553 | static int cypress_port_remove(struct usb_serial_port *port) |
1da177e4 LT |
554 | { |
555 | struct cypress_private *priv; | |
556 | ||
5c1a0f41 | 557 | priv = usb_get_serial_port_data(port); |
1da177e4 | 558 | |
5c1a0f41 JH |
559 | kfifo_free(&priv->write_fifo); |
560 | kfree(priv); | |
1da177e4 | 561 | |
5c1a0f41 JH |
562 | return 0; |
563 | } | |
1da177e4 | 564 | |
a509a7e4 | 565 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
566 | { |
567 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
568 | struct usb_serial *serial = port->serial; | |
569 | unsigned long flags; | |
570 | int result = 0; | |
571 | ||
78aef519 MI |
572 | if (!priv->comm_is_ok) |
573 | return -EIO; | |
574 | ||
1da177e4 | 575 | /* clear halts before open */ |
1da177e4 LT |
576 | usb_clear_halt(serial->dev, 0x81); |
577 | usb_clear_halt(serial->dev, 0x02); | |
578 | ||
579 | spin_lock_irqsave(&priv->lock, flags); | |
580 | /* reset read/write statistics */ | |
581 | priv->bytes_in = 0; | |
582 | priv->bytes_out = 0; | |
583 | priv->cmd_count = 0; | |
584 | priv->rx_flags = 0; | |
585 | spin_unlock_irqrestore(&priv->lock, flags); | |
586 | ||
335f8514 | 587 | /* Set termios */ |
fe1ae7fd | 588 | cypress_send(port); |
1da177e4 | 589 | |
95da310e AC |
590 | if (tty) |
591 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
592 | |
593 | /* setup the port and start reading from the device */ | |
813a224f | 594 | if (!port->interrupt_in_urb) { |
194343d9 GKH |
595 | dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n", |
596 | __func__); | |
813a224f | 597 | return -1; |
1da177e4 LT |
598 | } |
599 | ||
600 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
601 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
602 | port->interrupt_in_urb->transfer_buffer, |
603 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 604 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
605 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
606 | ||
813a224f AC |
607 | if (result) { |
608 | dev_err(&port->dev, | |
609 | "%s - failed submitting read urb, error %d\n", | |
610 | __func__, result); | |
78aef519 | 611 | cypress_set_dead(port); |
1da177e4 | 612 | } |
335f8514 | 613 | port->port.drain_delay = 256; |
1da177e4 LT |
614 | return result; |
615 | } /* cypress_open */ | |
616 | ||
335f8514 AC |
617 | static void cypress_dtr_rts(struct usb_serial_port *port, int on) |
618 | { | |
619 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
620 | /* drop dtr and rts */ | |
335f8514 AC |
621 | spin_lock_irq(&priv->lock); |
622 | if (on == 0) | |
623 | priv->line_control = 0; | |
624 | else | |
625 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
626 | priv->cmd_ctrl = 1; | |
627 | spin_unlock_irq(&priv->lock); | |
628 | cypress_write(NULL, port, NULL, 0); | |
629 | } | |
1da177e4 | 630 | |
335f8514 | 631 | static void cypress_close(struct usb_serial_port *port) |
1da177e4 LT |
632 | { |
633 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
117fb8d0 | 634 | unsigned long flags; |
1da177e4 | 635 | |
9e3b1d8e ON |
636 | /* writing is potentially harmful, lock must be taken */ |
637 | mutex_lock(&port->serial->disc_mutex); | |
638 | if (port->serial->disconnected) { | |
639 | mutex_unlock(&port->serial->disc_mutex); | |
640 | return; | |
641 | } | |
117fb8d0 JH |
642 | spin_lock_irqsave(&priv->lock, flags); |
643 | kfifo_reset_out(&priv->write_fifo); | |
644 | spin_unlock_irqrestore(&priv->lock, flags); | |
645 | ||
dfa1c315 | 646 | dev_dbg(&port->dev, "%s - stopping urbs\n", __func__); |
813a224f AC |
647 | usb_kill_urb(port->interrupt_in_urb); |
648 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 649 | |
1da177e4 | 650 | if (stats) |
813a224f AC |
651 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
652 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
9e3b1d8e | 653 | mutex_unlock(&port->serial->disc_mutex); |
1da177e4 LT |
654 | } /* cypress_close */ |
655 | ||
656 | ||
95da310e AC |
657 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
658 | const unsigned char *buf, int count) | |
1da177e4 LT |
659 | { |
660 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
813a224f | 661 | |
dfa1c315 | 662 | dev_dbg(&port->dev, "%s - port %d, %d bytes\n", __func__, port->number, count); |
1da177e4 LT |
663 | |
664 | /* line control commands, which need to be executed immediately, | |
665 | are not put into the buffer for obvious reasons. | |
666 | */ | |
667 | if (priv->cmd_ctrl) { | |
668 | count = 0; | |
669 | goto finish; | |
670 | } | |
813a224f | 671 | |
1da177e4 LT |
672 | if (!count) |
673 | return count; | |
813a224f | 674 | |
117fb8d0 | 675 | count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock); |
1da177e4 LT |
676 | |
677 | finish: | |
678 | cypress_send(port); | |
679 | ||
680 | return count; | |
681 | } /* cypress_write */ | |
682 | ||
683 | ||
684 | static void cypress_send(struct usb_serial_port *port) | |
685 | { | |
686 | int count = 0, result, offset, actual_size; | |
687 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
dfa1c315 | 688 | struct device *dev = &port->dev; |
1da177e4 | 689 | unsigned long flags; |
813a224f | 690 | |
78aef519 MI |
691 | if (!priv->comm_is_ok) |
692 | return; | |
693 | ||
dfa1c315 GKH |
694 | dev_dbg(dev, "%s - interrupt out size is %d\n", __func__, |
695 | port->interrupt_out_size); | |
813a224f | 696 | |
1da177e4 LT |
697 | spin_lock_irqsave(&priv->lock, flags); |
698 | if (priv->write_urb_in_use) { | |
dfa1c315 | 699 | dev_dbg(dev, "%s - can't write, urb in use\n", __func__); |
1da177e4 LT |
700 | spin_unlock_irqrestore(&priv->lock, flags); |
701 | return; | |
702 | } | |
703 | spin_unlock_irqrestore(&priv->lock, flags); | |
704 | ||
705 | /* clear buffer */ | |
813a224f AC |
706 | memset(port->interrupt_out_urb->transfer_buffer, 0, |
707 | port->interrupt_out_size); | |
1da177e4 LT |
708 | |
709 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
710 | switch (priv->pkt_fmt) { |
711 | default: | |
712 | case packet_format_1: | |
713 | /* this is for the CY7C64013... */ | |
714 | offset = 2; | |
715 | port->interrupt_out_buffer[0] = priv->line_control; | |
716 | break; | |
717 | case packet_format_2: | |
718 | /* this is for the CY7C63743... */ | |
719 | offset = 1; | |
720 | port->interrupt_out_buffer[0] = priv->line_control; | |
721 | break; | |
1da177e4 LT |
722 | } |
723 | ||
724 | if (priv->line_control & CONTROL_RESET) | |
725 | priv->line_control &= ~CONTROL_RESET; | |
726 | ||
727 | if (priv->cmd_ctrl) { | |
728 | priv->cmd_count++; | |
dfa1c315 | 729 | dev_dbg(dev, "%s - line control command being issued\n", __func__); |
1da177e4 LT |
730 | spin_unlock_irqrestore(&priv->lock, flags); |
731 | goto send; | |
732 | } else | |
733 | spin_unlock_irqrestore(&priv->lock, flags); | |
734 | ||
117fb8d0 JH |
735 | count = kfifo_out_locked(&priv->write_fifo, |
736 | &port->interrupt_out_buffer[offset], | |
737 | port->interrupt_out_size - offset, | |
738 | &priv->lock); | |
813a224f | 739 | if (count == 0) |
1da177e4 | 740 | return; |
1da177e4 | 741 | |
3416eaa1 MI |
742 | switch (priv->pkt_fmt) { |
743 | default: | |
744 | case packet_format_1: | |
745 | port->interrupt_out_buffer[1] = count; | |
746 | break; | |
747 | case packet_format_2: | |
748 | port->interrupt_out_buffer[0] |= count; | |
1da177e4 LT |
749 | } |
750 | ||
dfa1c315 | 751 | dev_dbg(dev, "%s - count is %d\n", __func__, count); |
1da177e4 LT |
752 | |
753 | send: | |
754 | spin_lock_irqsave(&priv->lock, flags); | |
755 | priv->write_urb_in_use = 1; | |
756 | spin_unlock_irqrestore(&priv->lock, flags); | |
757 | ||
758 | if (priv->cmd_ctrl) | |
759 | actual_size = 1; | |
760 | else | |
3416eaa1 MI |
761 | actual_size = count + |
762 | (priv->pkt_fmt == packet_format_1 ? 2 : 1); | |
763 | ||
59d33f2f GKH |
764 | usb_serial_debug_data(dev, __func__, port->interrupt_out_size, |
765 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 766 | |
9aa8dae7 MI |
767 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
768 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
769 | port->interrupt_out_buffer, port->interrupt_out_size, | |
770 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 771 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 772 | if (result) { |
22a416c4 | 773 | dev_err_console(port, |
813a224f AC |
774 | "%s - failed submitting write urb, error %d\n", |
775 | __func__, result); | |
1da177e4 | 776 | priv->write_urb_in_use = 0; |
78aef519 | 777 | cypress_set_dead(port); |
1da177e4 LT |
778 | } |
779 | ||
780 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 781 | if (priv->cmd_ctrl) |
1da177e4 | 782 | priv->cmd_ctrl = 0; |
813a224f AC |
783 | |
784 | /* do not count the line control and size bytes */ | |
785 | priv->bytes_out += count; | |
1da177e4 LT |
786 | spin_unlock_irqrestore(&priv->lock, flags); |
787 | ||
cf2c7481 | 788 | usb_serial_port_softint(port); |
1da177e4 LT |
789 | } /* cypress_send */ |
790 | ||
791 | ||
792 | /* returns how much space is available in the soft buffer */ | |
95da310e | 793 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 794 | { |
95da310e | 795 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
796 | struct cypress_private *priv = usb_get_serial_port_data(port); |
797 | int room = 0; | |
798 | unsigned long flags; | |
799 | ||
1da177e4 | 800 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 801 | room = kfifo_avail(&priv->write_fifo); |
1da177e4 LT |
802 | spin_unlock_irqrestore(&priv->lock, flags); |
803 | ||
dfa1c315 | 804 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
1da177e4 LT |
805 | return room; |
806 | } | |
807 | ||
808 | ||
60b33c13 | 809 | static int cypress_tiocmget(struct tty_struct *tty) |
1da177e4 | 810 | { |
95da310e | 811 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
812 | struct cypress_private *priv = usb_get_serial_port_data(port); |
813 | __u8 status, control; | |
814 | unsigned int result = 0; | |
815 | unsigned long flags; | |
813a224f | 816 | |
1da177e4 LT |
817 | spin_lock_irqsave(&priv->lock, flags); |
818 | control = priv->line_control; | |
819 | status = priv->current_status; | |
820 | spin_unlock_irqrestore(&priv->lock, flags); | |
821 | ||
822 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
823 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
824 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
825 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
826 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
827 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
828 | ||
dfa1c315 | 829 | dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); |
1da177e4 LT |
830 | |
831 | return result; | |
832 | } | |
833 | ||
834 | ||
20b9d177 | 835 | static int cypress_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
836 | unsigned int set, unsigned int clear) |
837 | { | |
95da310e | 838 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
839 | struct cypress_private *priv = usb_get_serial_port_data(port); |
840 | unsigned long flags; | |
813a224f | 841 | |
1da177e4 LT |
842 | spin_lock_irqsave(&priv->lock, flags); |
843 | if (set & TIOCM_RTS) | |
844 | priv->line_control |= CONTROL_RTS; | |
845 | if (set & TIOCM_DTR) | |
846 | priv->line_control |= CONTROL_DTR; | |
847 | if (clear & TIOCM_RTS) | |
848 | priv->line_control &= ~CONTROL_RTS; | |
849 | if (clear & TIOCM_DTR) | |
850 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 851 | priv->cmd_ctrl = 1; |
1da177e4 LT |
852 | spin_unlock_irqrestore(&priv->lock, flags); |
853 | ||
95da310e | 854 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
855 | } |
856 | ||
857 | ||
00a0d0d6 | 858 | static int cypress_ioctl(struct tty_struct *tty, |
95da310e | 859 | unsigned int cmd, unsigned long arg) |
1da177e4 | 860 | { |
95da310e | 861 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
862 | struct cypress_private *priv = usb_get_serial_port_data(port); |
863 | ||
dfa1c315 | 864 | dev_dbg(&port->dev, "%s - port %d, cmd 0x%.4x\n", __func__, port->number, cmd); |
1da177e4 LT |
865 | |
866 | switch (cmd) { | |
813a224f AC |
867 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ |
868 | case TIOCMIWAIT: | |
356050d8 JH |
869 | for (;;) { |
870 | interruptible_sleep_on(&port->delta_msr_wait); | |
813a224f AC |
871 | /* see if a signal did it */ |
872 | if (signal_pending(current)) | |
873 | return -ERESTARTSYS; | |
356050d8 JH |
874 | |
875 | if (port->serial->disconnected) | |
876 | return -EIO; | |
877 | ||
878 | { | |
813a224f AC |
879 | char diff = priv->diff_status; |
880 | if (diff == 0) | |
881 | return -EIO; /* no change => error */ | |
882 | ||
883 | /* consume all events */ | |
884 | priv->diff_status = 0; | |
885 | ||
886 | /* return 0 if caller wanted to know about | |
887 | these bits */ | |
888 | if (((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
889 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
890 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
891 | ((arg & TIOCM_CTS) && (diff & UART_CTS))) | |
892 | return 0; | |
893 | /* otherwise caller can't care less about what | |
894 | * happened, and so we continue to wait for | |
895 | * more events. | |
896 | */ | |
1da177e4 | 897 | } |
813a224f AC |
898 | } |
899 | return 0; | |
900 | default: | |
901 | break; | |
1da177e4 | 902 | } |
dfa1c315 | 903 | dev_dbg(&port->dev, "%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h\n", __func__, cmd); |
1da177e4 LT |
904 | return -ENOIOCTLCMD; |
905 | } /* cypress_ioctl */ | |
906 | ||
907 | ||
95da310e AC |
908 | static void cypress_set_termios(struct tty_struct *tty, |
909 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
910 | { |
911 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
dfa1c315 | 912 | struct device *dev = &port->dev; |
1da177e4 | 913 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 914 | unsigned cflag, iflag; |
1da177e4 LT |
915 | unsigned long flags; |
916 | __u8 oldlines; | |
3cb4a4f7 | 917 | int linechange = 0; |
b9db07fb | 918 | |
1da177e4 | 919 | spin_lock_irqsave(&priv->lock, flags); |
fe1ae7fd AC |
920 | /* We can't clean this one up as we don't know the device type |
921 | early enough */ | |
1da177e4 LT |
922 | if (!priv->termios_initialized) { |
923 | if (priv->chiptype == CT_EARTHMATE) { | |
adc8d746 AC |
924 | tty->termios = tty_std_termios; |
925 | tty->termios.c_cflag = B4800 | CS8 | CREAD | HUPCL | | |
b9db07fb | 926 | CLOCAL; |
adc8d746 AC |
927 | tty->termios.c_ispeed = 4800; |
928 | tty->termios.c_ospeed = 4800; | |
1da177e4 | 929 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
adc8d746 AC |
930 | tty->termios = tty_std_termios; |
931 | tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
b9db07fb | 932 | CLOCAL; |
adc8d746 AC |
933 | tty->termios.c_ispeed = 9600; |
934 | tty->termios.c_ospeed = 9600; | |
a5c44e29 | 935 | } else if (priv->chiptype == CT_CA42V2) { |
adc8d746 AC |
936 | tty->termios = tty_std_termios; |
937 | tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
a5c44e29 | 938 | CLOCAL; |
adc8d746 AC |
939 | tty->termios.c_ispeed = 9600; |
940 | tty->termios.c_ospeed = 9600; | |
1da177e4 LT |
941 | } |
942 | priv->termios_initialized = 1; | |
943 | } | |
944 | spin_unlock_irqrestore(&priv->lock, flags); | |
945 | ||
8873aaa6 | 946 | /* Unsupported features need clearing */ |
adc8d746 | 947 | tty->termios.c_cflag &= ~(CMSPAR|CRTSCTS); |
8873aaa6 | 948 | |
adc8d746 AC |
949 | cflag = tty->termios.c_cflag; |
950 | iflag = tty->termios.c_iflag; | |
1da177e4 LT |
951 | |
952 | /* check if there are new settings */ | |
953 | if (old_termios) { | |
8873aaa6 | 954 | spin_lock_irqsave(&priv->lock, flags); |
adc8d746 | 955 | priv->tmp_termios = tty->termios; |
8873aaa6 AC |
956 | spin_unlock_irqrestore(&priv->lock, flags); |
957 | } | |
1da177e4 LT |
958 | |
959 | /* set number of data bits, parity, stop bits */ | |
960 | /* when parity is disabled the parity type bit is ignored */ | |
961 | ||
b9db07fb LM |
962 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
963 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
964 | ||
1da177e4 LT |
965 | if (cflag & PARENB) { |
966 | parity_enable = 1; | |
b9db07fb LM |
967 | /* 1 means odd parity, 0 means even parity */ |
968 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
969 | } else |
970 | parity_enable = parity_type = 0; | |
971 | ||
77336828 AC |
972 | switch (cflag & CSIZE) { |
973 | case CS5: | |
974 | data_bits = 0; | |
975 | break; | |
976 | case CS6: | |
977 | data_bits = 1; | |
978 | break; | |
979 | case CS7: | |
980 | data_bits = 2; | |
981 | break; | |
982 | case CS8: | |
1da177e4 | 983 | data_bits = 3; |
77336828 AC |
984 | break; |
985 | default: | |
dfa1c315 | 986 | dev_err(dev, "%s - CSIZE was set, but not CS5-CS8\n", __func__); |
77336828 AC |
987 | data_bits = 3; |
988 | } | |
1da177e4 LT |
989 | spin_lock_irqsave(&priv->lock, flags); |
990 | oldlines = priv->line_control; | |
991 | if ((cflag & CBAUD) == B0) { | |
992 | /* drop dtr and rts */ | |
dfa1c315 | 993 | dev_dbg(dev, "%s - dropping the lines, baud rate 0bps\n", __func__); |
1da177e4 | 994 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 995 | } else |
3cb4a4f7 | 996 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 997 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 998 | |
dfa1c315 GKH |
999 | dev_dbg(dev, "%s - sending %d stop_bits, %d parity_enable, %d parity_type, %d data_bits (+5)\n", |
1000 | __func__, stop_bits, parity_enable, parity_type, data_bits); | |
b9db07fb | 1001 | |
813a224f AC |
1002 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
1003 | data_bits, stop_bits, | |
1004 | parity_enable, parity_type, | |
1005 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1006 | |
b9db07fb LM |
1007 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1008 | * filled into the private structure this should confirm that all is | |
1009 | * working if it returns what we just set */ | |
95da310e | 1010 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 1011 | |
b9db07fb LM |
1012 | /* Here we can define custom tty settings for devices; the main tty |
1013 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1014 | |
b9db07fb | 1015 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 1016 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
dfa1c315 | 1017 | dev_dbg(dev, "Using custom termios settings for a baud rate of 4800bps.\n"); |
1da177e4 LT |
1018 | /* define custom termios settings for NMEA protocol */ |
1019 | ||
adc8d746 | 1020 | tty->termios.c_iflag /* input modes - */ |
b9db07fb LM |
1021 | &= ~(IGNBRK /* disable ignore break */ |
1022 | | BRKINT /* disable break causes interrupt */ | |
1023 | | PARMRK /* disable mark parity errors */ | |
1024 | | ISTRIP /* disable clear high bit of input char */ | |
1025 | | INLCR /* disable translate NL to CR */ | |
1026 | | IGNCR /* disable ignore CR */ | |
1027 | | ICRNL /* disable translate CR to NL */ | |
1028 | | IXON); /* disable enable XON/XOFF flow control */ | |
1029 | ||
adc8d746 | 1030 | tty->termios.c_oflag /* output modes */ |
b9db07fb | 1031 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1032 | |
adc8d746 | 1033 | tty->termios.c_lflag /* line discipline modes */ |
b9db07fb LM |
1034 | &= ~(ECHO /* disable echo input characters */ |
1035 | | ECHONL /* disable echo new line */ | |
1036 | | ICANON /* disable erase, kill, werase, and rprnt | |
1037 | special characters */ | |
1038 | | ISIG /* disable interrupt, quit, and suspend | |
1039 | special characters */ | |
1040 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1041 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1042 | |
1da177e4 LT |
1043 | linechange = (priv->line_control != oldlines); |
1044 | spin_unlock_irqrestore(&priv->lock, flags); | |
1045 | ||
1046 | /* if necessary, set lines */ | |
3cb4a4f7 | 1047 | if (linechange) { |
1da177e4 | 1048 | priv->cmd_ctrl = 1; |
95da310e | 1049 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1050 | } |
1da177e4 LT |
1051 | } /* cypress_set_termios */ |
1052 | ||
b9db07fb | 1053 | |
1da177e4 | 1054 | /* returns amount of data still left in soft buffer */ |
95da310e | 1055 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1056 | { |
95da310e | 1057 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1058 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1059 | int chars = 0; | |
1060 | unsigned long flags; | |
1061 | ||
1da177e4 | 1062 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 1063 | chars = kfifo_len(&priv->write_fifo); |
1da177e4 LT |
1064 | spin_unlock_irqrestore(&priv->lock, flags); |
1065 | ||
dfa1c315 | 1066 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
1da177e4 LT |
1067 | return chars; |
1068 | } | |
1069 | ||
1070 | ||
95da310e | 1071 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1072 | { |
95da310e | 1073 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1074 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1da177e4 | 1075 | |
63832515 | 1076 | spin_lock_irq(&priv->lock); |
1da177e4 | 1077 | priv->rx_flags = THROTTLED; |
63832515 | 1078 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
1079 | } |
1080 | ||
1081 | ||
95da310e | 1082 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1083 | { |
95da310e | 1084 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1085 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1086 | int actually_throttled, result; | |
1da177e4 | 1087 | |
63832515 | 1088 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
1089 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
1090 | priv->rx_flags = 0; | |
63832515 | 1091 | spin_unlock_irq(&priv->lock); |
1da177e4 | 1092 | |
78aef519 MI |
1093 | if (!priv->comm_is_ok) |
1094 | return; | |
1095 | ||
1da177e4 | 1096 | if (actually_throttled) { |
63832515 | 1097 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
78aef519 | 1098 | if (result) { |
b9db07fb | 1099 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1100 | "error %d\n", __func__, result); |
78aef519 MI |
1101 | cypress_set_dead(port); |
1102 | } | |
1da177e4 LT |
1103 | } |
1104 | } | |
1105 | ||
1106 | ||
7d12e780 | 1107 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1108 | { |
cdc97792 | 1109 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1110 | struct cypress_private *priv = usb_get_serial_port_data(port); |
dfa1c315 | 1111 | struct device *dev = &urb->dev->dev; |
1da177e4 LT |
1112 | struct tty_struct *tty; |
1113 | unsigned char *data = urb->transfer_buffer; | |
1114 | unsigned long flags; | |
b9db07fb | 1115 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1116 | int havedata = 0; |
1117 | int bytes = 0; | |
1118 | int result; | |
1119 | int i = 0; | |
8d7bc55e | 1120 | int status = urb->status; |
1da177e4 | 1121 | |
8d7bc55e | 1122 | switch (status) { |
78aef519 MI |
1123 | case 0: /* success */ |
1124 | break; | |
1125 | case -ECONNRESET: | |
1126 | case -ENOENT: | |
1127 | case -ESHUTDOWN: | |
1128 | /* precursor to disconnect so just go away */ | |
1129 | return; | |
1130 | case -EPIPE: | |
4d2fae8b AS |
1131 | /* Can't call usb_clear_halt while in_interrupt */ |
1132 | /* FALLS THROUGH */ | |
78aef519 MI |
1133 | default: |
1134 | /* something ugly is going on... */ | |
dfa1c315 GKH |
1135 | dev_err(dev, "%s - unexpected nonzero read status received: %d\n", |
1136 | __func__, status); | |
78aef519 | 1137 | cypress_set_dead(port); |
1da177e4 LT |
1138 | return; |
1139 | } | |
1140 | ||
1141 | spin_lock_irqsave(&priv->lock, flags); | |
1142 | if (priv->rx_flags & THROTTLED) { | |
dfa1c315 | 1143 | dev_dbg(dev, "%s - now throttling\n", __func__); |
1da177e4 LT |
1144 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1145 | spin_unlock_irqrestore(&priv->lock, flags); | |
1146 | return; | |
1147 | } | |
1148 | spin_unlock_irqrestore(&priv->lock, flags); | |
1149 | ||
4a90f09b | 1150 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1151 | if (!tty) { |
dfa1c315 | 1152 | dev_dbg(dev, "%s - bad tty pointer - exiting\n", __func__); |
1da177e4 LT |
1153 | return; |
1154 | } | |
1155 | ||
1156 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1157 | result = urb->actual_length; |
1158 | switch (priv->pkt_fmt) { | |
1159 | default: | |
1160 | case packet_format_1: | |
1161 | /* This is for the CY7C64013... */ | |
1162 | priv->current_status = data[0] & 0xF8; | |
1163 | bytes = data[1] + 2; | |
1164 | i = 2; | |
1165 | if (bytes > 2) | |
1166 | havedata = 1; | |
1167 | break; | |
1168 | case packet_format_2: | |
1169 | /* This is for the CY7C63743... */ | |
1170 | priv->current_status = data[0] & 0xF8; | |
1171 | bytes = (data[0] & 0x07) + 1; | |
1172 | i = 1; | |
1173 | if (bytes > 1) | |
1174 | havedata = 1; | |
1175 | break; | |
1da177e4 LT |
1176 | } |
1177 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 | 1178 | if (result < bytes) { |
dfa1c315 GKH |
1179 | dev_dbg(dev, |
1180 | "%s - wrong packet size - received %d bytes but packet said %d bytes\n", | |
1181 | __func__, result, bytes); | |
3416eaa1 MI |
1182 | goto continue_read; |
1183 | } | |
1da177e4 | 1184 | |
59d33f2f | 1185 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
1da177e4 LT |
1186 | |
1187 | spin_lock_irqsave(&priv->lock, flags); | |
1188 | /* check to see if status has changed */ | |
6768306c MI |
1189 | if (priv->current_status != priv->prev_status) { |
1190 | priv->diff_status |= priv->current_status ^ | |
1191 | priv->prev_status; | |
356050d8 | 1192 | wake_up_interruptible(&port->delta_msr_wait); |
6768306c | 1193 | priv->prev_status = priv->current_status; |
1da177e4 | 1194 | } |
b9db07fb | 1195 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1196 | |
b9db07fb LM |
1197 | /* hangup, as defined in acm.c... this might be a bad place for it |
1198 | * though */ | |
adc8d746 | 1199 | if (tty && !(tty->termios.c_cflag & CLOCAL) && |
b9db07fb | 1200 | !(priv->current_status & UART_CD)) { |
dfa1c315 | 1201 | dev_dbg(dev, "%s - calling hangup\n", __func__); |
1da177e4 LT |
1202 | tty_hangup(tty); |
1203 | goto continue_read; | |
1204 | } | |
1205 | ||
b9db07fb LM |
1206 | /* There is one error bit... I'm assuming it is a parity error |
1207 | * indicator as the generic firmware will set this bit to 1 if a | |
1208 | * parity error occurs. | |
1209 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1210 | spin_lock_irqsave(&priv->lock, flags); |
1211 | if (priv->current_status & CYP_ERROR) { | |
1212 | spin_unlock_irqrestore(&priv->lock, flags); | |
1213 | tty_flag = TTY_PARITY; | |
dfa1c315 | 1214 | dev_dbg(dev, "%s - Parity Error detected\n", __func__); |
1da177e4 LT |
1215 | } else |
1216 | spin_unlock_irqrestore(&priv->lock, flags); | |
1217 | ||
1218 | /* process read if there is data other than line status */ | |
2e124b4a | 1219 | if (bytes > i) { |
2f693357 | 1220 | tty_insert_flip_string_fixed_flag(&port->port, data + i, |
70ced221 | 1221 | tty_flag, bytes - i); |
2e124b4a | 1222 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1226 | /* control and status byte(s) are also counted */ |
1227 | priv->bytes_in += bytes; | |
1da177e4 LT |
1228 | spin_unlock_irqrestore(&priv->lock, flags); |
1229 | ||
1230 | continue_read: | |
4a90f09b | 1231 | tty_kref_put(tty); |
b9db07fb | 1232 | |
1f87158e | 1233 | /* Continue trying to always read */ |
1da177e4 | 1234 | |
1f87158e | 1235 | if (priv->comm_is_ok) { |
b9db07fb LM |
1236 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1237 | usb_rcvintpipe(port->serial->dev, | |
1238 | port->interrupt_in_endpointAddress), | |
1239 | port->interrupt_in_urb->transfer_buffer, | |
1240 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1241 | cypress_read_int_callback, port, |
1242 | priv->read_urb_interval); | |
b9db07fb | 1243 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
1f87158e | 1244 | if (result && result != -EPERM) { |
dfa1c315 GKH |
1245 | dev_err(dev, "%s - failed resubmitting read urb, error %d\n", |
1246 | __func__, result); | |
78aef519 MI |
1247 | cypress_set_dead(port); |
1248 | } | |
1da177e4 | 1249 | } |
1da177e4 LT |
1250 | } /* cypress_read_int_callback */ |
1251 | ||
1252 | ||
7d12e780 | 1253 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1254 | { |
cdc97792 | 1255 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1256 | struct cypress_private *priv = usb_get_serial_port_data(port); |
dfa1c315 | 1257 | struct device *dev = &urb->dev->dev; |
1da177e4 | 1258 | int result; |
8d7bc55e | 1259 | int status = urb->status; |
1da177e4 | 1260 | |
8d7bc55e | 1261 | switch (status) { |
813a224f AC |
1262 | case 0: |
1263 | /* success */ | |
1264 | break; | |
1265 | case -ECONNRESET: | |
1266 | case -ENOENT: | |
1267 | case -ESHUTDOWN: | |
1268 | /* this urb is terminated, clean up */ | |
dfa1c315 GKH |
1269 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", |
1270 | __func__, status); | |
813a224f AC |
1271 | priv->write_urb_in_use = 0; |
1272 | return; | |
1273 | case -EPIPE: /* no break needed; clear halt and resubmit */ | |
1274 | if (!priv->comm_is_ok) | |
1da177e4 | 1275 | break; |
813a224f AC |
1276 | usb_clear_halt(port->serial->dev, 0x02); |
1277 | /* error in the urb, so we have to resubmit it */ | |
dfa1c315 | 1278 | dev_dbg(dev, "%s - nonzero write bulk status received: %d\n", |
813a224f AC |
1279 | __func__, status); |
1280 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
813a224f AC |
1281 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1282 | if (!result) | |
1da177e4 | 1283 | return; |
dfa1c315 GKH |
1284 | dev_err(dev, "%s - failed resubmitting write urb, error %d\n", |
1285 | __func__, result); | |
813a224f AC |
1286 | cypress_set_dead(port); |
1287 | break; | |
1288 | default: | |
dfa1c315 GKH |
1289 | dev_err(dev, "%s - unexpected nonzero write status received: %d\n", |
1290 | __func__, status); | |
813a224f AC |
1291 | cypress_set_dead(port); |
1292 | break; | |
1da177e4 | 1293 | } |
1da177e4 | 1294 | priv->write_urb_in_use = 0; |
813a224f | 1295 | |
1da177e4 LT |
1296 | /* send any buffered data */ |
1297 | cypress_send(port); | |
1298 | } | |
1299 | ||
68e24113 | 1300 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1301 | |
813a224f AC |
1302 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1303 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1304 | MODULE_LICENSE("GPL"); |
1305 | ||
1da177e4 LT |
1306 | module_param(stats, bool, S_IRUGO | S_IWUSR); |
1307 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1308 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1309 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); | |
c312659c MF |
1310 | module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR); |
1311 | MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates"); |