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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 | 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) }, |
6529591e | 68 | { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) }, |
1da177e4 LT |
69 | { } /* Terminating entry */ |
70 | }; | |
71 | ||
7d40d7e8 | 72 | static const struct usb_device_id id_table_nokiaca42v2[] = { |
a5c44e29 LM |
73 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
74 | { } /* Terminating entry */ | |
75 | }; | |
76 | ||
7d40d7e8 | 77 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 | 78 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 79 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 | 80 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 81 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
6529591e | 82 | { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) }, |
a5c44e29 | 83 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
84 | { } /* Terminating entry */ |
85 | }; | |
86 | ||
813a224f | 87 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 88 | |
3416eaa1 MI |
89 | enum packet_format { |
90 | packet_format_1, /* b0:status, b1:payload count */ | |
91 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
92 | }; | |
93 | ||
1da177e4 LT |
94 | struct cypress_private { |
95 | spinlock_t lock; /* private lock */ | |
96 | int chiptype; /* identifier of device, for quirks/etc */ | |
97 | int bytes_in; /* used for statistics */ | |
98 | int bytes_out; /* used for statistics */ | |
99 | int cmd_count; /* used for statistics */ | |
100 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
117fb8d0 | 101 | struct kfifo write_fifo; /* write fifo */ |
1da177e4 | 102 | int write_urb_in_use; /* write urb in use indicator */ |
0257fa9f MI |
103 | int write_urb_interval; /* interval to use for write urb */ |
104 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 105 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
106 | int termios_initialized; |
107 | __u8 line_control; /* holds dtr / rts value */ | |
108 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
109 | __u8 current_config; /* stores the current configuration byte */ | |
110 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 111 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 112 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
113 | int baud_rate; /* stores current baud rate in |
114 | integer form */ | |
1da177e4 | 115 | int isthrottled; /* if throttled, discard reads */ |
1da177e4 | 116 | char prev_status, diff_status; /* used for TIOCMIWAIT */ |
3ad2f3fb | 117 | /* we pass a pointer to this as the argument sent to |
813a224f | 118 | cypress_set_termios old_termios */ |
606d099c | 119 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
120 | }; |
121 | ||
1da177e4 | 122 | /* function prototypes for the Cypress USB to serial device */ |
5c1a0f41 JH |
123 | static int cypress_earthmate_port_probe(struct usb_serial_port *port); |
124 | static int cypress_hidcom_port_probe(struct usb_serial_port *port); | |
125 | static int cypress_ca42v2_port_probe(struct usb_serial_port *port); | |
126 | static int cypress_port_remove(struct usb_serial_port *port); | |
a509a7e4 | 127 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
128 | static void cypress_close(struct usb_serial_port *port); |
129 | static void cypress_dtr_rts(struct usb_serial_port *port, int on); | |
813a224f AC |
130 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
131 | const unsigned char *buf, int count); | |
132 | static void cypress_send(struct usb_serial_port *port); | |
133 | static int cypress_write_room(struct tty_struct *tty); | |
813a224f AC |
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 | 138 | unsigned int set, unsigned int clear); |
493516e3 | 139 | static int cypress_tiocmiwait(struct tty_struct *tty, unsigned long arg); |
813a224f AC |
140 | static int cypress_chars_in_buffer(struct tty_struct *tty); |
141 | static void cypress_throttle(struct tty_struct *tty); | |
142 | static void cypress_unthrottle(struct tty_struct *tty); | |
143 | static void cypress_set_dead(struct usb_serial_port *port); | |
144 | static void cypress_read_int_callback(struct urb *urb); | |
145 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 | 146 | |
ea65370d | 147 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
148 | .driver = { |
149 | .owner = THIS_MODULE, | |
269bda1c | 150 | .name = "earthmate", |
18fcac35 | 151 | }, |
269bda1c | 152 | .description = "DeLorme Earthmate USB", |
1da177e4 | 153 | .id_table = id_table_earthmate, |
1da177e4 | 154 | .num_ports = 1, |
5c1a0f41 JH |
155 | .port_probe = cypress_earthmate_port_probe, |
156 | .port_remove = cypress_port_remove, | |
1da177e4 LT |
157 | .open = cypress_open, |
158 | .close = cypress_close, | |
335f8514 | 159 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
160 | .write = cypress_write, |
161 | .write_room = cypress_write_room, | |
1da177e4 LT |
162 | .set_termios = cypress_set_termios, |
163 | .tiocmget = cypress_tiocmget, | |
164 | .tiocmset = cypress_tiocmset, | |
493516e3 | 165 | .tiocmiwait = cypress_tiocmiwait, |
1da177e4 LT |
166 | .chars_in_buffer = cypress_chars_in_buffer, |
167 | .throttle = cypress_throttle, | |
168 | .unthrottle = cypress_unthrottle, | |
169 | .read_int_callback = cypress_read_int_callback, | |
170 | .write_int_callback = cypress_write_int_callback, | |
171 | }; | |
172 | ||
ea65370d | 173 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
174 | .driver = { |
175 | .owner = THIS_MODULE, | |
269bda1c | 176 | .name = "cyphidcom", |
18fcac35 | 177 | }, |
269bda1c | 178 | .description = "HID->COM RS232 Adapter", |
1da177e4 | 179 | .id_table = id_table_cyphidcomrs232, |
1da177e4 | 180 | .num_ports = 1, |
5c1a0f41 JH |
181 | .port_probe = cypress_hidcom_port_probe, |
182 | .port_remove = cypress_port_remove, | |
1da177e4 LT |
183 | .open = cypress_open, |
184 | .close = cypress_close, | |
335f8514 | 185 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
186 | .write = cypress_write, |
187 | .write_room = cypress_write_room, | |
1da177e4 LT |
188 | .set_termios = cypress_set_termios, |
189 | .tiocmget = cypress_tiocmget, | |
190 | .tiocmset = cypress_tiocmset, | |
493516e3 | 191 | .tiocmiwait = cypress_tiocmiwait, |
1da177e4 LT |
192 | .chars_in_buffer = cypress_chars_in_buffer, |
193 | .throttle = cypress_throttle, | |
194 | .unthrottle = cypress_unthrottle, | |
195 | .read_int_callback = cypress_read_int_callback, | |
196 | .write_int_callback = cypress_write_int_callback, | |
197 | }; | |
198 | ||
a5c44e29 LM |
199 | static struct usb_serial_driver cypress_ca42v2_device = { |
200 | .driver = { | |
201 | .owner = THIS_MODULE, | |
813a224f | 202 | .name = "nokiaca42v2", |
a5c44e29 LM |
203 | }, |
204 | .description = "Nokia CA-42 V2 Adapter", | |
205 | .id_table = id_table_nokiaca42v2, | |
a5c44e29 | 206 | .num_ports = 1, |
5c1a0f41 JH |
207 | .port_probe = cypress_ca42v2_port_probe, |
208 | .port_remove = cypress_port_remove, | |
a5c44e29 LM |
209 | .open = cypress_open, |
210 | .close = cypress_close, | |
335f8514 | 211 | .dtr_rts = cypress_dtr_rts, |
a5c44e29 LM |
212 | .write = cypress_write, |
213 | .write_room = cypress_write_room, | |
a5c44e29 LM |
214 | .set_termios = cypress_set_termios, |
215 | .tiocmget = cypress_tiocmget, | |
216 | .tiocmset = cypress_tiocmset, | |
493516e3 | 217 | .tiocmiwait = cypress_tiocmiwait, |
a5c44e29 LM |
218 | .chars_in_buffer = cypress_chars_in_buffer, |
219 | .throttle = cypress_throttle, | |
220 | .unthrottle = cypress_unthrottle, | |
221 | .read_int_callback = cypress_read_int_callback, | |
222 | .write_int_callback = cypress_write_int_callback, | |
223 | }; | |
1da177e4 | 224 | |
08a4f6bc AS |
225 | static struct usb_serial_driver * const serial_drivers[] = { |
226 | &cypress_earthmate_device, &cypress_hidcom_device, | |
227 | &cypress_ca42v2_device, NULL | |
228 | }; | |
229 | ||
1da177e4 LT |
230 | /***************************************************************************** |
231 | * Cypress serial helper functions | |
232 | *****************************************************************************/ | |
233 | ||
6529591e RB |
234 | /* FRWD Dongle hidcom needs to skip reset and speed checks */ |
235 | static inline bool is_frwd(struct usb_device *dev) | |
236 | { | |
237 | return ((le16_to_cpu(dev->descriptor.idVendor) == VENDOR_ID_FRWD) && | |
238 | (le16_to_cpu(dev->descriptor.idProduct) == PRODUCT_ID_CYPHIDCOM_FRWD)); | |
239 | } | |
1da177e4 | 240 | |
8873aaa6 | 241 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 242 | { |
92983c21 MI |
243 | struct cypress_private *priv; |
244 | priv = usb_get_serial_port_data(port); | |
245 | ||
c312659c MF |
246 | if (unstable_bauds) |
247 | return new_rate; | |
248 | ||
6529591e RB |
249 | /* FRWD Dongle uses 115200 bps */ |
250 | if (is_frwd(port->serial->dev)) | |
251 | return new_rate; | |
252 | ||
92983c21 MI |
253 | /* |
254 | * The general purpose firmware for the Cypress M8 allows for | |
255 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
256 | * chose to use the general purpose firmware or not), if you | |
257 | * need to modify this speed setting for your own project | |
258 | * please add your own chiptype and modify the code likewise. | |
259 | * The Cypress HID->COM device will work successfully up to | |
260 | * 115200bps (but the actual throughput is around 3kBps). | |
261 | */ | |
92983c21 MI |
262 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
263 | /* | |
264 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
265 | * Cypress app note that describes this mechanism | |
266 | * states the the low-speed part can't handle more | |
267 | * than 800 bytes/sec, in which case 4800 baud is the | |
268 | * safest speed for a part like that. | |
269 | */ | |
270 | if (new_rate > 4800) { | |
dfa1c315 GKH |
271 | dev_dbg(&port->dev, |
272 | "%s - failed setting baud rate, device incapable speed %d\n", | |
273 | __func__, new_rate); | |
92983c21 MI |
274 | return -1; |
275 | } | |
276 | } | |
277 | switch (priv->chiptype) { | |
278 | case CT_EARTHMATE: | |
279 | if (new_rate <= 600) { | |
280 | /* 300 and 600 baud rates are supported under | |
281 | * the generic firmware, but are not used with | |
282 | * NMEA and SiRF protocols */ | |
dfa1c315 GKH |
283 | dev_dbg(&port->dev, |
284 | "%s - failed setting baud rate, unsupported speed of %d on Earthmate GPS", | |
285 | __func__, new_rate); | |
92983c21 MI |
286 | return -1; |
287 | } | |
288 | break; | |
289 | default: | |
290 | break; | |
291 | } | |
292 | return new_rate; | |
293 | } | |
294 | ||
295 | ||
093cf723 | 296 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 297 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
298 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
299 | int stop_bits, int parity_enable, int parity_type, int reset, | |
300 | int cypress_request_type) | |
1da177e4 | 301 | { |
3cb4a4f7 | 302 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 303 | struct cypress_private *priv; |
dfa1c315 | 304 | struct device *dev = &port->dev; |
0954644b JH |
305 | u8 *feature_buffer; |
306 | const unsigned int feature_len = 5; | |
1da177e4 LT |
307 | unsigned long flags; |
308 | ||
1da177e4 LT |
309 | priv = usb_get_serial_port_data(port); |
310 | ||
78aef519 MI |
311 | if (!priv->comm_is_ok) |
312 | return -ENODEV; | |
313 | ||
0954644b JH |
314 | feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL); |
315 | if (!feature_buffer) | |
316 | return -ENOMEM; | |
317 | ||
813a224f AC |
318 | switch (cypress_request_type) { |
319 | case CYPRESS_SET_CONFIG: | |
813a224f | 320 | /* 0 means 'Hang up' so doesn't change the true bit rate */ |
2805eb13 MF |
321 | new_baudrate = priv->baud_rate; |
322 | if (baud_rate && baud_rate != priv->baud_rate) { | |
dfa1c315 | 323 | dev_dbg(dev, "%s - baud rate is changing\n", __func__); |
813a224f | 324 | retval = analyze_baud_rate(port, baud_rate); |
2805eb13 | 325 | if (retval >= 0) { |
813a224f | 326 | new_baudrate = retval; |
dfa1c315 GKH |
327 | dev_dbg(dev, "%s - New baud rate set to %d\n", |
328 | __func__, new_baudrate); | |
1da177e4 | 329 | } |
813a224f | 330 | } |
dfa1c315 GKH |
331 | dev_dbg(dev, "%s - baud rate is being sent as %d\n", __func__, |
332 | new_baudrate); | |
813a224f | 333 | |
813a224f | 334 | /* fill the feature_buffer with new configuration */ |
0f2c2d7b | 335 | put_unaligned_le32(new_baudrate, feature_buffer); |
813a224f AC |
336 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
337 | /* 1 bit gap */ | |
338 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
339 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
340 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
341 | /* 1 bit gap */ | |
342 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
343 | ||
dfa1c315 GKH |
344 | dev_dbg(dev, "%s - device is being sent this feature report:\n", __func__); |
345 | dev_dbg(dev, "%s - %02X - %02X - %02X - %02X - %02X\n", __func__, | |
813a224f AC |
346 | feature_buffer[0], feature_buffer[1], |
347 | feature_buffer[2], feature_buffer[3], | |
348 | feature_buffer[4]); | |
349 | ||
350 | do { | |
351 | retval = usb_control_msg(port->serial->dev, | |
352 | usb_sndctrlpipe(port->serial->dev, 0), | |
353 | HID_REQ_SET_REPORT, | |
354 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
355 | 0x0300, 0, feature_buffer, | |
0954644b | 356 | feature_len, 500); |
813a224f AC |
357 | |
358 | if (tries++ >= 3) | |
359 | break; | |
360 | ||
0954644b | 361 | } while (retval != feature_len && |
813a224f AC |
362 | retval != -ENODEV); |
363 | ||
0954644b | 364 | if (retval != feature_len) { |
dfa1c315 GKH |
365 | dev_err(dev, "%s - failed sending serial line settings - %d\n", |
366 | __func__, retval); | |
813a224f AC |
367 | cypress_set_dead(port); |
368 | } else { | |
369 | spin_lock_irqsave(&priv->lock, flags); | |
370 | priv->baud_rate = new_baudrate; | |
371 | priv->current_config = feature_buffer[4]; | |
372 | spin_unlock_irqrestore(&priv->lock, flags); | |
373 | /* If we asked for a speed change encode it */ | |
374 | if (baud_rate) | |
375 | tty_encode_baud_rate(tty, | |
376 | new_baudrate, new_baudrate); | |
377 | } | |
378 | break; | |
379 | case CYPRESS_GET_CONFIG: | |
380 | if (priv->get_cfg_unsafe) { | |
381 | /* Not implemented for this device, | |
382 | and if we try to do it we're likely | |
383 | to crash the hardware. */ | |
0954644b JH |
384 | retval = -ENOTTY; |
385 | goto out; | |
813a224f | 386 | } |
dfa1c315 | 387 | dev_dbg(dev, "%s - retreiving serial line settings\n", __func__); |
813a224f AC |
388 | do { |
389 | retval = usb_control_msg(port->serial->dev, | |
390 | usb_rcvctrlpipe(port->serial->dev, 0), | |
391 | HID_REQ_GET_REPORT, | |
392 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
393 | 0x0300, 0, feature_buffer, | |
0954644b | 394 | feature_len, 500); |
813a224f AC |
395 | |
396 | if (tries++ >= 3) | |
397 | break; | |
0954644b | 398 | } while (retval != feature_len |
813a224f AC |
399 | && retval != -ENODEV); |
400 | ||
0954644b | 401 | if (retval != feature_len) { |
dfa1c315 GKH |
402 | dev_err(dev, "%s - failed to retrieve serial line settings - %d\n", |
403 | __func__, retval); | |
813a224f | 404 | cypress_set_dead(port); |
0954644b | 405 | goto out; |
813a224f AC |
406 | } else { |
407 | spin_lock_irqsave(&priv->lock, flags); | |
408 | /* store the config in one byte, and later | |
409 | use bit masks to check values */ | |
410 | priv->current_config = feature_buffer[4]; | |
0f2c2d7b | 411 | priv->baud_rate = get_unaligned_le32(feature_buffer); |
813a224f AC |
412 | spin_unlock_irqrestore(&priv->lock, flags); |
413 | } | |
1da177e4 | 414 | } |
3cb4a4f7 LM |
415 | spin_lock_irqsave(&priv->lock, flags); |
416 | ++priv->cmd_count; | |
417 | spin_unlock_irqrestore(&priv->lock, flags); | |
0954644b JH |
418 | out: |
419 | kfree(feature_buffer); | |
1da177e4 LT |
420 | return retval; |
421 | } /* cypress_serial_control */ | |
422 | ||
423 | ||
78aef519 MI |
424 | static void cypress_set_dead(struct usb_serial_port *port) |
425 | { | |
426 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
427 | unsigned long flags; | |
428 | ||
429 | spin_lock_irqsave(&priv->lock, flags); | |
430 | if (!priv->comm_is_ok) { | |
431 | spin_unlock_irqrestore(&priv->lock, flags); | |
432 | return; | |
433 | } | |
434 | priv->comm_is_ok = 0; | |
435 | spin_unlock_irqrestore(&priv->lock, flags); | |
436 | ||
194343d9 GKH |
437 | dev_err(&port->dev, "cypress_m8 suspending failing port %d - " |
438 | "interval might be too short\n", port->number); | |
78aef519 MI |
439 | } |
440 | ||
441 | ||
1da177e4 LT |
442 | /***************************************************************************** |
443 | * Cypress serial driver functions | |
444 | *****************************************************************************/ | |
445 | ||
446 | ||
5c1a0f41 | 447 | static int cypress_generic_port_probe(struct usb_serial_port *port) |
1da177e4 | 448 | { |
5c1a0f41 | 449 | struct usb_serial *serial = port->serial; |
1da177e4 LT |
450 | struct cypress_private *priv; |
451 | ||
813a224f | 452 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
453 | if (!priv) |
454 | return -ENOMEM; | |
455 | ||
78aef519 | 456 | priv->comm_is_ok = !0; |
1da177e4 | 457 | spin_lock_init(&priv->lock); |
117fb8d0 | 458 | if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) { |
1da177e4 LT |
459 | kfree(priv); |
460 | return -ENOMEM; | |
461 | } | |
813a224f | 462 | |
6529591e RB |
463 | /* Skip reset for FRWD device. It is a workaound: |
464 | device hangs if it receives SET_CONFIGURE in Configured | |
465 | state. */ | |
466 | if (!is_frwd(serial->dev)) | |
467 | usb_reset_configuration(serial->dev); | |
813a224f | 468 | |
1da177e4 LT |
469 | priv->cmd_ctrl = 0; |
470 | priv->line_control = 0; | |
471 | priv->termios_initialized = 0; | |
1da177e4 | 472 | priv->rx_flags = 0; |
3416eaa1 MI |
473 | /* Default packet format setting is determined by packet size. |
474 | Anything with a size larger then 9 must have a separate | |
475 | count field since the 3 bit count field is otherwise too | |
476 | small. Otherwise we can use the slightly more compact | |
477 | format. This is in accordance with the cypress_m8 serial | |
478 | converter app note. */ | |
813a224f | 479 | if (port->interrupt_out_size > 9) |
3416eaa1 | 480 | priv->pkt_fmt = packet_format_1; |
813a224f | 481 | else |
3416eaa1 | 482 | priv->pkt_fmt = packet_format_2; |
813a224f | 483 | |
0257fa9f MI |
484 | if (interval > 0) { |
485 | priv->write_urb_interval = interval; | |
486 | priv->read_urb_interval = interval; | |
dfa1c315 GKH |
487 | dev_dbg(&port->dev, "%s - read & write intervals forced to %d\n", |
488 | __func__, interval); | |
0257fa9f MI |
489 | } else { |
490 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
491 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
dfa1c315 GKH |
492 | dev_dbg(&port->dev, "%s - intervals: read=%d write=%d\n", |
493 | __func__, priv->read_urb_interval, | |
494 | priv->write_urb_interval); | |
0257fa9f MI |
495 | } |
496 | usb_set_serial_port_data(port, priv); | |
813a224f | 497 | |
b9db07fb LM |
498 | return 0; |
499 | } | |
1da177e4 LT |
500 | |
501 | ||
5c1a0f41 | 502 | static int cypress_earthmate_port_probe(struct usb_serial_port *port) |
1da177e4 | 503 | { |
5c1a0f41 | 504 | struct usb_serial *serial = port->serial; |
1da177e4 | 505 | struct cypress_private *priv; |
5c1a0f41 | 506 | int ret; |
1da177e4 | 507 | |
5c1a0f41 JH |
508 | ret = cypress_generic_port_probe(port); |
509 | if (ret) { | |
dfa1c315 | 510 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 511 | return ret; |
1da177e4 LT |
512 | } |
513 | ||
3d6aa320 | 514 | priv = usb_get_serial_port_data(port); |
1da177e4 | 515 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
516 | /* All Earthmate devices use the separated-count packet |
517 | format! Idiotic. */ | |
518 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
519 | if (serial->dev->descriptor.idProduct != |
520 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
521 | /* The old original USB Earthmate seemed able to |
522 | handle GET_CONFIG requests; everything they've | |
523 | produced since that time crashes if this command is | |
524 | attempted :-( */ | |
dfa1c315 GKH |
525 | dev_dbg(&port->dev, |
526 | "%s - Marking this device as unsafe for GET_CONFIG commands\n", | |
527 | __func__); | |
3d6aa320 MI |
528 | priv->get_cfg_unsafe = !0; |
529 | } | |
b9db07fb LM |
530 | |
531 | return 0; | |
5c1a0f41 | 532 | } |
1da177e4 | 533 | |
5c1a0f41 | 534 | static int cypress_hidcom_port_probe(struct usb_serial_port *port) |
1da177e4 LT |
535 | { |
536 | struct cypress_private *priv; | |
5c1a0f41 | 537 | int ret; |
1da177e4 | 538 | |
5c1a0f41 JH |
539 | ret = cypress_generic_port_probe(port); |
540 | if (ret) { | |
dfa1c315 | 541 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 542 | return ret; |
1da177e4 LT |
543 | } |
544 | ||
dfa1c315 | 545 | priv = usb_get_serial_port_data(port); |
1da177e4 | 546 | priv->chiptype = CT_CYPHIDCOM; |
813a224f | 547 | |
b9db07fb | 548 | return 0; |
5c1a0f41 | 549 | } |
1da177e4 | 550 | |
5c1a0f41 | 551 | static int cypress_ca42v2_port_probe(struct usb_serial_port *port) |
a5c44e29 LM |
552 | { |
553 | struct cypress_private *priv; | |
5c1a0f41 | 554 | int ret; |
a5c44e29 | 555 | |
5c1a0f41 JH |
556 | ret = cypress_generic_port_probe(port); |
557 | if (ret) { | |
dfa1c315 | 558 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 559 | return ret; |
a5c44e29 LM |
560 | } |
561 | ||
dfa1c315 | 562 | priv = usb_get_serial_port_data(port); |
a5c44e29 LM |
563 | priv->chiptype = CT_CA42V2; |
564 | ||
565 | return 0; | |
5c1a0f41 | 566 | } |
a5c44e29 | 567 | |
5c1a0f41 | 568 | static int cypress_port_remove(struct usb_serial_port *port) |
1da177e4 LT |
569 | { |
570 | struct cypress_private *priv; | |
571 | ||
5c1a0f41 | 572 | priv = usb_get_serial_port_data(port); |
1da177e4 | 573 | |
5c1a0f41 JH |
574 | kfifo_free(&priv->write_fifo); |
575 | kfree(priv); | |
1da177e4 | 576 | |
5c1a0f41 JH |
577 | return 0; |
578 | } | |
1da177e4 | 579 | |
a509a7e4 | 580 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
581 | { |
582 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
583 | struct usb_serial *serial = port->serial; | |
584 | unsigned long flags; | |
585 | int result = 0; | |
586 | ||
78aef519 MI |
587 | if (!priv->comm_is_ok) |
588 | return -EIO; | |
589 | ||
1da177e4 | 590 | /* clear halts before open */ |
1da177e4 LT |
591 | usb_clear_halt(serial->dev, 0x81); |
592 | usb_clear_halt(serial->dev, 0x02); | |
593 | ||
594 | spin_lock_irqsave(&priv->lock, flags); | |
595 | /* reset read/write statistics */ | |
596 | priv->bytes_in = 0; | |
597 | priv->bytes_out = 0; | |
598 | priv->cmd_count = 0; | |
599 | priv->rx_flags = 0; | |
600 | spin_unlock_irqrestore(&priv->lock, flags); | |
601 | ||
335f8514 | 602 | /* Set termios */ |
fe1ae7fd | 603 | cypress_send(port); |
1da177e4 | 604 | |
95da310e AC |
605 | if (tty) |
606 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
607 | |
608 | /* setup the port and start reading from the device */ | |
813a224f | 609 | if (!port->interrupt_in_urb) { |
194343d9 GKH |
610 | dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n", |
611 | __func__); | |
813a224f | 612 | return -1; |
1da177e4 LT |
613 | } |
614 | ||
615 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, | |
616 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
617 | port->interrupt_in_urb->transfer_buffer, |
618 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 619 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
620 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
621 | ||
813a224f AC |
622 | if (result) { |
623 | dev_err(&port->dev, | |
624 | "%s - failed submitting read urb, error %d\n", | |
625 | __func__, result); | |
78aef519 | 626 | cypress_set_dead(port); |
1da177e4 | 627 | } |
335f8514 | 628 | port->port.drain_delay = 256; |
1da177e4 LT |
629 | return result; |
630 | } /* cypress_open */ | |
631 | ||
335f8514 AC |
632 | static void cypress_dtr_rts(struct usb_serial_port *port, int on) |
633 | { | |
634 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
635 | /* drop dtr and rts */ | |
335f8514 AC |
636 | spin_lock_irq(&priv->lock); |
637 | if (on == 0) | |
638 | priv->line_control = 0; | |
639 | else | |
640 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
641 | priv->cmd_ctrl = 1; | |
642 | spin_unlock_irq(&priv->lock); | |
643 | cypress_write(NULL, port, NULL, 0); | |
644 | } | |
1da177e4 | 645 | |
335f8514 | 646 | static void cypress_close(struct usb_serial_port *port) |
1da177e4 LT |
647 | { |
648 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
117fb8d0 | 649 | unsigned long flags; |
1da177e4 | 650 | |
117fb8d0 JH |
651 | spin_lock_irqsave(&priv->lock, flags); |
652 | kfifo_reset_out(&priv->write_fifo); | |
653 | spin_unlock_irqrestore(&priv->lock, flags); | |
654 | ||
dfa1c315 | 655 | dev_dbg(&port->dev, "%s - stopping urbs\n", __func__); |
813a224f AC |
656 | usb_kill_urb(port->interrupt_in_urb); |
657 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 658 | |
1da177e4 | 659 | if (stats) |
813a224f AC |
660 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
661 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
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 | ||
59d33f2f GKH |
772 | usb_serial_debug_data(dev, __func__, port->interrupt_out_size, |
773 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 774 | |
9aa8dae7 MI |
775 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
776 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
777 | port->interrupt_out_buffer, port->interrupt_out_size, | |
778 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 779 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 780 | if (result) { |
22a416c4 | 781 | dev_err_console(port, |
813a224f AC |
782 | "%s - failed submitting write urb, error %d\n", |
783 | __func__, result); | |
1da177e4 | 784 | priv->write_urb_in_use = 0; |
78aef519 | 785 | cypress_set_dead(port); |
1da177e4 LT |
786 | } |
787 | ||
788 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 789 | if (priv->cmd_ctrl) |
1da177e4 | 790 | priv->cmd_ctrl = 0; |
813a224f AC |
791 | |
792 | /* do not count the line control and size bytes */ | |
793 | priv->bytes_out += count; | |
1da177e4 LT |
794 | spin_unlock_irqrestore(&priv->lock, flags); |
795 | ||
cf2c7481 | 796 | usb_serial_port_softint(port); |
1da177e4 LT |
797 | } /* cypress_send */ |
798 | ||
799 | ||
800 | /* returns how much space is available in the soft buffer */ | |
95da310e | 801 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 802 | { |
95da310e | 803 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
804 | struct cypress_private *priv = usb_get_serial_port_data(port); |
805 | int room = 0; | |
806 | unsigned long flags; | |
807 | ||
1da177e4 | 808 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 809 | room = kfifo_avail(&priv->write_fifo); |
1da177e4 LT |
810 | spin_unlock_irqrestore(&priv->lock, flags); |
811 | ||
dfa1c315 | 812 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
1da177e4 LT |
813 | return room; |
814 | } | |
815 | ||
816 | ||
60b33c13 | 817 | static int cypress_tiocmget(struct tty_struct *tty) |
1da177e4 | 818 | { |
95da310e | 819 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
820 | struct cypress_private *priv = usb_get_serial_port_data(port); |
821 | __u8 status, control; | |
822 | unsigned int result = 0; | |
823 | unsigned long flags; | |
813a224f | 824 | |
1da177e4 LT |
825 | spin_lock_irqsave(&priv->lock, flags); |
826 | control = priv->line_control; | |
827 | status = priv->current_status; | |
828 | spin_unlock_irqrestore(&priv->lock, flags); | |
829 | ||
830 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
831 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
832 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
833 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
834 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
835 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
836 | ||
dfa1c315 | 837 | dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); |
1da177e4 LT |
838 | |
839 | return result; | |
840 | } | |
841 | ||
842 | ||
20b9d177 | 843 | static int cypress_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
844 | unsigned int set, unsigned int clear) |
845 | { | |
95da310e | 846 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
847 | struct cypress_private *priv = usb_get_serial_port_data(port); |
848 | unsigned long flags; | |
813a224f | 849 | |
1da177e4 LT |
850 | spin_lock_irqsave(&priv->lock, flags); |
851 | if (set & TIOCM_RTS) | |
852 | priv->line_control |= CONTROL_RTS; | |
853 | if (set & TIOCM_DTR) | |
854 | priv->line_control |= CONTROL_DTR; | |
855 | if (clear & TIOCM_RTS) | |
856 | priv->line_control &= ~CONTROL_RTS; | |
857 | if (clear & TIOCM_DTR) | |
858 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 859 | priv->cmd_ctrl = 1; |
1da177e4 LT |
860 | spin_unlock_irqrestore(&priv->lock, flags); |
861 | ||
95da310e | 862 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
863 | } |
864 | ||
865 | ||
493516e3 | 866 | static int cypress_tiocmiwait(struct tty_struct *tty, unsigned long arg) |
1da177e4 | 867 | { |
95da310e | 868 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 869 | struct cypress_private *priv = usb_get_serial_port_data(port); |
493516e3 JH |
870 | char diff; |
871 | ||
872 | for (;;) { | |
c648e94e | 873 | interruptible_sleep_on(&port->port.delta_msr_wait); |
493516e3 JH |
874 | /* see if a signal did it */ |
875 | if (signal_pending(current)) | |
876 | return -ERESTARTSYS; | |
877 | ||
878 | if (port->serial->disconnected) | |
879 | return -EIO; | |
880 | ||
881 | diff = priv->diff_status; | |
882 | if (diff == 0) | |
883 | return -EIO; /* no change => error */ | |
884 | ||
885 | /* consume all events */ | |
886 | priv->diff_status = 0; | |
887 | ||
888 | /* return 0 if caller wanted to know about | |
889 | these bits */ | |
890 | if (((arg & TIOCM_RNG) && (diff & UART_RI)) || | |
891 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || | |
892 | ((arg & TIOCM_CD) && (diff & UART_CD)) || | |
893 | ((arg & TIOCM_CTS) && (diff & UART_CTS))) | |
894 | return 0; | |
895 | /* otherwise caller can't care less about what | |
896 | * happened, and so we continue to wait for | |
897 | * more events. | |
898 | */ | |
1da177e4 | 899 | } |
1da177e4 | 900 | |
493516e3 JH |
901 | return 0; |
902 | } | |
1da177e4 | 903 | |
95da310e AC |
904 | static void cypress_set_termios(struct tty_struct *tty, |
905 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
906 | { |
907 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
dfa1c315 | 908 | struct device *dev = &port->dev; |
1da177e4 | 909 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 910 | unsigned cflag, iflag; |
1da177e4 LT |
911 | unsigned long flags; |
912 | __u8 oldlines; | |
3cb4a4f7 | 913 | int linechange = 0; |
b9db07fb | 914 | |
1da177e4 | 915 | spin_lock_irqsave(&priv->lock, flags); |
fe1ae7fd AC |
916 | /* We can't clean this one up as we don't know the device type |
917 | early enough */ | |
1da177e4 LT |
918 | if (!priv->termios_initialized) { |
919 | if (priv->chiptype == CT_EARTHMATE) { | |
adc8d746 AC |
920 | tty->termios = tty_std_termios; |
921 | tty->termios.c_cflag = B4800 | CS8 | CREAD | HUPCL | | |
b9db07fb | 922 | CLOCAL; |
adc8d746 AC |
923 | tty->termios.c_ispeed = 4800; |
924 | tty->termios.c_ospeed = 4800; | |
1da177e4 | 925 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
adc8d746 AC |
926 | tty->termios = tty_std_termios; |
927 | tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
b9db07fb | 928 | CLOCAL; |
adc8d746 AC |
929 | tty->termios.c_ispeed = 9600; |
930 | tty->termios.c_ospeed = 9600; | |
a5c44e29 | 931 | } else if (priv->chiptype == CT_CA42V2) { |
adc8d746 AC |
932 | tty->termios = tty_std_termios; |
933 | tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
a5c44e29 | 934 | CLOCAL; |
adc8d746 AC |
935 | tty->termios.c_ispeed = 9600; |
936 | tty->termios.c_ospeed = 9600; | |
1da177e4 LT |
937 | } |
938 | priv->termios_initialized = 1; | |
939 | } | |
940 | spin_unlock_irqrestore(&priv->lock, flags); | |
941 | ||
8873aaa6 | 942 | /* Unsupported features need clearing */ |
adc8d746 | 943 | tty->termios.c_cflag &= ~(CMSPAR|CRTSCTS); |
8873aaa6 | 944 | |
adc8d746 AC |
945 | cflag = tty->termios.c_cflag; |
946 | iflag = tty->termios.c_iflag; | |
1da177e4 LT |
947 | |
948 | /* check if there are new settings */ | |
949 | if (old_termios) { | |
8873aaa6 | 950 | spin_lock_irqsave(&priv->lock, flags); |
adc8d746 | 951 | priv->tmp_termios = tty->termios; |
8873aaa6 AC |
952 | spin_unlock_irqrestore(&priv->lock, flags); |
953 | } | |
1da177e4 LT |
954 | |
955 | /* set number of data bits, parity, stop bits */ | |
956 | /* when parity is disabled the parity type bit is ignored */ | |
957 | ||
b9db07fb LM |
958 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
959 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
960 | ||
1da177e4 LT |
961 | if (cflag & PARENB) { |
962 | parity_enable = 1; | |
b9db07fb LM |
963 | /* 1 means odd parity, 0 means even parity */ |
964 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
965 | } else |
966 | parity_enable = parity_type = 0; | |
967 | ||
77336828 AC |
968 | switch (cflag & CSIZE) { |
969 | case CS5: | |
970 | data_bits = 0; | |
971 | break; | |
972 | case CS6: | |
973 | data_bits = 1; | |
974 | break; | |
975 | case CS7: | |
976 | data_bits = 2; | |
977 | break; | |
978 | case CS8: | |
1da177e4 | 979 | data_bits = 3; |
77336828 AC |
980 | break; |
981 | default: | |
dfa1c315 | 982 | dev_err(dev, "%s - CSIZE was set, but not CS5-CS8\n", __func__); |
77336828 AC |
983 | data_bits = 3; |
984 | } | |
1da177e4 LT |
985 | spin_lock_irqsave(&priv->lock, flags); |
986 | oldlines = priv->line_control; | |
987 | if ((cflag & CBAUD) == B0) { | |
988 | /* drop dtr and rts */ | |
dfa1c315 | 989 | dev_dbg(dev, "%s - dropping the lines, baud rate 0bps\n", __func__); |
1da177e4 | 990 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 991 | } else |
3cb4a4f7 | 992 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 993 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 994 | |
dfa1c315 GKH |
995 | dev_dbg(dev, "%s - sending %d stop_bits, %d parity_enable, %d parity_type, %d data_bits (+5)\n", |
996 | __func__, stop_bits, parity_enable, parity_type, data_bits); | |
b9db07fb | 997 | |
813a224f AC |
998 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
999 | data_bits, stop_bits, | |
1000 | parity_enable, parity_type, | |
1001 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 1002 | |
b9db07fb LM |
1003 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
1004 | * filled into the private structure this should confirm that all is | |
1005 | * working if it returns what we just set */ | |
95da310e | 1006 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 1007 | |
b9db07fb LM |
1008 | /* Here we can define custom tty settings for devices; the main tty |
1009 | * termios flag base comes from empeg.c */ | |
1da177e4 | 1010 | |
b9db07fb | 1011 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 1012 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
dfa1c315 | 1013 | dev_dbg(dev, "Using custom termios settings for a baud rate of 4800bps.\n"); |
1da177e4 LT |
1014 | /* define custom termios settings for NMEA protocol */ |
1015 | ||
adc8d746 | 1016 | tty->termios.c_iflag /* input modes - */ |
b9db07fb LM |
1017 | &= ~(IGNBRK /* disable ignore break */ |
1018 | | BRKINT /* disable break causes interrupt */ | |
1019 | | PARMRK /* disable mark parity errors */ | |
1020 | | ISTRIP /* disable clear high bit of input char */ | |
1021 | | INLCR /* disable translate NL to CR */ | |
1022 | | IGNCR /* disable ignore CR */ | |
1023 | | ICRNL /* disable translate CR to NL */ | |
1024 | | IXON); /* disable enable XON/XOFF flow control */ | |
1025 | ||
adc8d746 | 1026 | tty->termios.c_oflag /* output modes */ |
b9db07fb | 1027 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 1028 | |
adc8d746 | 1029 | tty->termios.c_lflag /* line discipline modes */ |
b9db07fb LM |
1030 | &= ~(ECHO /* disable echo input characters */ |
1031 | | ECHONL /* disable echo new line */ | |
1032 | | ICANON /* disable erase, kill, werase, and rprnt | |
1033 | special characters */ | |
1034 | | ISIG /* disable interrupt, quit, and suspend | |
1035 | special characters */ | |
1036 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 1037 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 1038 | |
1da177e4 LT |
1039 | linechange = (priv->line_control != oldlines); |
1040 | spin_unlock_irqrestore(&priv->lock, flags); | |
1041 | ||
1042 | /* if necessary, set lines */ | |
3cb4a4f7 | 1043 | if (linechange) { |
1da177e4 | 1044 | priv->cmd_ctrl = 1; |
95da310e | 1045 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1046 | } |
1da177e4 LT |
1047 | } /* cypress_set_termios */ |
1048 | ||
b9db07fb | 1049 | |
1da177e4 | 1050 | /* returns amount of data still left in soft buffer */ |
95da310e | 1051 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1052 | { |
95da310e | 1053 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1054 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1055 | int chars = 0; | |
1056 | unsigned long flags; | |
1057 | ||
1da177e4 | 1058 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 1059 | chars = kfifo_len(&priv->write_fifo); |
1da177e4 LT |
1060 | spin_unlock_irqrestore(&priv->lock, flags); |
1061 | ||
dfa1c315 | 1062 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
1da177e4 LT |
1063 | return chars; |
1064 | } | |
1065 | ||
1066 | ||
95da310e | 1067 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1068 | { |
95da310e | 1069 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1070 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1da177e4 | 1071 | |
63832515 | 1072 | spin_lock_irq(&priv->lock); |
1da177e4 | 1073 | priv->rx_flags = THROTTLED; |
63832515 | 1074 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
1075 | } |
1076 | ||
1077 | ||
95da310e | 1078 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1079 | { |
95da310e | 1080 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1081 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1082 | int actually_throttled, result; | |
1da177e4 | 1083 | |
63832515 | 1084 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
1085 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
1086 | priv->rx_flags = 0; | |
63832515 | 1087 | spin_unlock_irq(&priv->lock); |
1da177e4 | 1088 | |
78aef519 MI |
1089 | if (!priv->comm_is_ok) |
1090 | return; | |
1091 | ||
1da177e4 | 1092 | if (actually_throttled) { |
63832515 | 1093 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
78aef519 | 1094 | if (result) { |
b9db07fb | 1095 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1096 | "error %d\n", __func__, result); |
78aef519 MI |
1097 | cypress_set_dead(port); |
1098 | } | |
1da177e4 LT |
1099 | } |
1100 | } | |
1101 | ||
1102 | ||
7d12e780 | 1103 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1104 | { |
cdc97792 | 1105 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1106 | struct cypress_private *priv = usb_get_serial_port_data(port); |
dfa1c315 | 1107 | struct device *dev = &urb->dev->dev; |
1da177e4 LT |
1108 | struct tty_struct *tty; |
1109 | unsigned char *data = urb->transfer_buffer; | |
1110 | unsigned long flags; | |
b9db07fb | 1111 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1112 | int havedata = 0; |
1113 | int bytes = 0; | |
1114 | int result; | |
1115 | int i = 0; | |
8d7bc55e | 1116 | int status = urb->status; |
1da177e4 | 1117 | |
8d7bc55e | 1118 | switch (status) { |
78aef519 MI |
1119 | case 0: /* success */ |
1120 | break; | |
1121 | case -ECONNRESET: | |
1122 | case -ENOENT: | |
1123 | case -ESHUTDOWN: | |
1124 | /* precursor to disconnect so just go away */ | |
1125 | return; | |
1126 | case -EPIPE: | |
4d2fae8b AS |
1127 | /* Can't call usb_clear_halt while in_interrupt */ |
1128 | /* FALLS THROUGH */ | |
78aef519 MI |
1129 | default: |
1130 | /* something ugly is going on... */ | |
dfa1c315 GKH |
1131 | dev_err(dev, "%s - unexpected nonzero read status received: %d\n", |
1132 | __func__, status); | |
78aef519 | 1133 | cypress_set_dead(port); |
1da177e4 LT |
1134 | return; |
1135 | } | |
1136 | ||
1137 | spin_lock_irqsave(&priv->lock, flags); | |
1138 | if (priv->rx_flags & THROTTLED) { | |
dfa1c315 | 1139 | dev_dbg(dev, "%s - now throttling\n", __func__); |
1da177e4 LT |
1140 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1141 | spin_unlock_irqrestore(&priv->lock, flags); | |
1142 | return; | |
1143 | } | |
1144 | spin_unlock_irqrestore(&priv->lock, flags); | |
1145 | ||
4a90f09b | 1146 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1147 | if (!tty) { |
dfa1c315 | 1148 | dev_dbg(dev, "%s - bad tty pointer - exiting\n", __func__); |
1da177e4 LT |
1149 | return; |
1150 | } | |
1151 | ||
1152 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1153 | result = urb->actual_length; |
1154 | switch (priv->pkt_fmt) { | |
1155 | default: | |
1156 | case packet_format_1: | |
1157 | /* This is for the CY7C64013... */ | |
1158 | priv->current_status = data[0] & 0xF8; | |
1159 | bytes = data[1] + 2; | |
1160 | i = 2; | |
1161 | if (bytes > 2) | |
1162 | havedata = 1; | |
1163 | break; | |
1164 | case packet_format_2: | |
1165 | /* This is for the CY7C63743... */ | |
1166 | priv->current_status = data[0] & 0xF8; | |
1167 | bytes = (data[0] & 0x07) + 1; | |
1168 | i = 1; | |
1169 | if (bytes > 1) | |
1170 | havedata = 1; | |
1171 | break; | |
1da177e4 LT |
1172 | } |
1173 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 | 1174 | if (result < bytes) { |
dfa1c315 GKH |
1175 | dev_dbg(dev, |
1176 | "%s - wrong packet size - received %d bytes but packet said %d bytes\n", | |
1177 | __func__, result, bytes); | |
3416eaa1 MI |
1178 | goto continue_read; |
1179 | } | |
1da177e4 | 1180 | |
59d33f2f | 1181 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
1da177e4 LT |
1182 | |
1183 | spin_lock_irqsave(&priv->lock, flags); | |
1184 | /* check to see if status has changed */ | |
6768306c MI |
1185 | if (priv->current_status != priv->prev_status) { |
1186 | priv->diff_status |= priv->current_status ^ | |
1187 | priv->prev_status; | |
c648e94e | 1188 | wake_up_interruptible(&port->port.delta_msr_wait); |
6768306c | 1189 | priv->prev_status = priv->current_status; |
1da177e4 | 1190 | } |
b9db07fb | 1191 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1192 | |
b9db07fb LM |
1193 | /* hangup, as defined in acm.c... this might be a bad place for it |
1194 | * though */ | |
adc8d746 | 1195 | if (tty && !(tty->termios.c_cflag & CLOCAL) && |
b9db07fb | 1196 | !(priv->current_status & UART_CD)) { |
dfa1c315 | 1197 | dev_dbg(dev, "%s - calling hangup\n", __func__); |
1da177e4 LT |
1198 | tty_hangup(tty); |
1199 | goto continue_read; | |
1200 | } | |
1201 | ||
b9db07fb LM |
1202 | /* There is one error bit... I'm assuming it is a parity error |
1203 | * indicator as the generic firmware will set this bit to 1 if a | |
1204 | * parity error occurs. | |
1205 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1206 | spin_lock_irqsave(&priv->lock, flags); |
1207 | if (priv->current_status & CYP_ERROR) { | |
1208 | spin_unlock_irqrestore(&priv->lock, flags); | |
1209 | tty_flag = TTY_PARITY; | |
dfa1c315 | 1210 | dev_dbg(dev, "%s - Parity Error detected\n", __func__); |
1da177e4 LT |
1211 | } else |
1212 | spin_unlock_irqrestore(&priv->lock, flags); | |
1213 | ||
1214 | /* process read if there is data other than line status */ | |
2e124b4a | 1215 | if (bytes > i) { |
2f693357 | 1216 | tty_insert_flip_string_fixed_flag(&port->port, data + i, |
70ced221 | 1217 | tty_flag, bytes - i); |
2e124b4a | 1218 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
1219 | } |
1220 | ||
1221 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1222 | /* control and status byte(s) are also counted */ |
1223 | priv->bytes_in += bytes; | |
1da177e4 LT |
1224 | spin_unlock_irqrestore(&priv->lock, flags); |
1225 | ||
1226 | continue_read: | |
4a90f09b | 1227 | tty_kref_put(tty); |
b9db07fb | 1228 | |
1f87158e | 1229 | /* Continue trying to always read */ |
1da177e4 | 1230 | |
1f87158e | 1231 | if (priv->comm_is_ok) { |
b9db07fb LM |
1232 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1233 | usb_rcvintpipe(port->serial->dev, | |
1234 | port->interrupt_in_endpointAddress), | |
1235 | port->interrupt_in_urb->transfer_buffer, | |
1236 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1237 | cypress_read_int_callback, port, |
1238 | priv->read_urb_interval); | |
b9db07fb | 1239 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
1f87158e | 1240 | if (result && result != -EPERM) { |
dfa1c315 GKH |
1241 | dev_err(dev, "%s - failed resubmitting read urb, error %d\n", |
1242 | __func__, result); | |
78aef519 MI |
1243 | cypress_set_dead(port); |
1244 | } | |
1da177e4 | 1245 | } |
1da177e4 LT |
1246 | } /* cypress_read_int_callback */ |
1247 | ||
1248 | ||
7d12e780 | 1249 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1250 | { |
cdc97792 | 1251 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1252 | struct cypress_private *priv = usb_get_serial_port_data(port); |
dfa1c315 | 1253 | struct device *dev = &urb->dev->dev; |
1da177e4 | 1254 | int result; |
8d7bc55e | 1255 | int status = urb->status; |
1da177e4 | 1256 | |
8d7bc55e | 1257 | switch (status) { |
813a224f AC |
1258 | case 0: |
1259 | /* success */ | |
1260 | break; | |
1261 | case -ECONNRESET: | |
1262 | case -ENOENT: | |
1263 | case -ESHUTDOWN: | |
1264 | /* this urb is terminated, clean up */ | |
dfa1c315 GKH |
1265 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", |
1266 | __func__, status); | |
813a224f AC |
1267 | priv->write_urb_in_use = 0; |
1268 | return; | |
1269 | case -EPIPE: /* no break needed; clear halt and resubmit */ | |
1270 | if (!priv->comm_is_ok) | |
1da177e4 | 1271 | break; |
813a224f AC |
1272 | usb_clear_halt(port->serial->dev, 0x02); |
1273 | /* error in the urb, so we have to resubmit it */ | |
dfa1c315 | 1274 | dev_dbg(dev, "%s - nonzero write bulk status received: %d\n", |
813a224f AC |
1275 | __func__, status); |
1276 | port->interrupt_out_urb->transfer_buffer_length = 1; | |
813a224f AC |
1277 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1278 | if (!result) | |
1da177e4 | 1279 | return; |
dfa1c315 GKH |
1280 | dev_err(dev, "%s - failed resubmitting write urb, error %d\n", |
1281 | __func__, result); | |
813a224f AC |
1282 | cypress_set_dead(port); |
1283 | break; | |
1284 | default: | |
dfa1c315 GKH |
1285 | dev_err(dev, "%s - unexpected nonzero write status received: %d\n", |
1286 | __func__, status); | |
813a224f AC |
1287 | cypress_set_dead(port); |
1288 | break; | |
1da177e4 | 1289 | } |
1da177e4 | 1290 | priv->write_urb_in_use = 0; |
813a224f | 1291 | |
1da177e4 LT |
1292 | /* send any buffered data */ |
1293 | cypress_send(port); | |
1294 | } | |
1295 | ||
68e24113 | 1296 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1297 | |
813a224f AC |
1298 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1299 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1300 | MODULE_LICENSE("GPL"); |
1301 | ||
1da177e4 LT |
1302 | module_param(stats, bool, S_IRUGO | S_IWUSR); |
1303 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1304 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1305 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); | |
c312659c MF |
1306 | module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR); |
1307 | MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates"); |