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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> | |
1da177e4 LT |
30 | #include <linux/slab.h> |
31 | #include <linux/tty.h> | |
32 | #include <linux/tty_driver.h> | |
33 | #include <linux/tty_flip.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/moduleparam.h> | |
36 | #include <linux/spinlock.h> | |
37 | #include <linux/usb.h> | |
a969888c | 38 | #include <linux/usb/serial.h> |
1da177e4 | 39 | #include <linux/serial.h> |
117fb8d0 | 40 | #include <linux/kfifo.h> |
1da177e4 | 41 | #include <linux/delay.h> |
813a224f | 42 | #include <linux/uaccess.h> |
0f2c2d7b | 43 | #include <asm/unaligned.h> |
1da177e4 | 44 | |
1da177e4 LT |
45 | #include "cypress_m8.h" |
46 | ||
47 | ||
90ab5ee9 | 48 | static bool stats; |
3cb4a4f7 | 49 | static int interval; |
90ab5ee9 | 50 | static bool unstable_bauds; |
1da177e4 | 51 | |
1da177e4 LT |
52 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
53 | #define DRIVER_DESC "Cypress USB to Serial Driver" | |
54 | ||
55 | /* write buffer size defines */ | |
56 | #define CYPRESS_BUF_SIZE 1024 | |
1da177e4 | 57 | |
7d40d7e8 | 58 | static const struct usb_device_id id_table_earthmate[] = { |
1da177e4 | 59 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
25b6f08e | 60 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
1da177e4 LT |
61 | { } /* Terminating entry */ |
62 | }; | |
63 | ||
7d40d7e8 | 64 | static const struct usb_device_id id_table_cyphidcomrs232[] = { |
1da177e4 | 65 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
6f6f06ee | 66 | { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) }, |
6529591e | 67 | { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) }, |
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) }, |
6529591e | 81 | { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) }, |
a5c44e29 | 82 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
1da177e4 LT |
83 | { } /* Terminating entry */ |
84 | }; | |
85 | ||
813a224f | 86 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 87 | |
3416eaa1 MI |
88 | enum packet_format { |
89 | packet_format_1, /* b0:status, b1:payload count */ | |
90 | packet_format_2 /* b0[7:3]:status, b0[2:0]:payload count */ | |
91 | }; | |
92 | ||
1da177e4 LT |
93 | struct cypress_private { |
94 | spinlock_t lock; /* private lock */ | |
95 | int chiptype; /* identifier of device, for quirks/etc */ | |
96 | int bytes_in; /* used for statistics */ | |
97 | int bytes_out; /* used for statistics */ | |
98 | int cmd_count; /* used for statistics */ | |
99 | int cmd_ctrl; /* always set this to 1 before issuing a command */ | |
117fb8d0 | 100 | struct kfifo write_fifo; /* write fifo */ |
1da177e4 | 101 | int write_urb_in_use; /* write urb in use indicator */ |
0257fa9f MI |
102 | int write_urb_interval; /* interval to use for write urb */ |
103 | int read_urb_interval; /* interval to use for read urb */ | |
78aef519 | 104 | int comm_is_ok; /* true if communication is (still) ok */ |
1da177e4 LT |
105 | int termios_initialized; |
106 | __u8 line_control; /* holds dtr / rts value */ | |
107 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ | |
108 | __u8 current_config; /* stores the current configuration byte */ | |
109 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ | |
3416eaa1 | 110 | enum packet_format pkt_fmt; /* format to use for packet send / receive */ |
3d6aa320 | 111 | int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */ |
813a224f AC |
112 | int baud_rate; /* stores current baud rate in |
113 | integer form */ | |
1da177e4 | 114 | int isthrottled; /* if throttled, discard reads */ |
ab62a585 | 115 | char prev_status; /* used for TIOCMIWAIT */ |
3ad2f3fb | 116 | /* we pass a pointer to this as the argument sent to |
813a224f | 117 | cypress_set_termios old_termios */ |
606d099c | 118 | struct ktermios tmp_termios; /* stores the old termios settings */ |
1da177e4 LT |
119 | }; |
120 | ||
1da177e4 | 121 | /* function prototypes for the Cypress USB to serial device */ |
5c1a0f41 JH |
122 | static int cypress_earthmate_port_probe(struct usb_serial_port *port); |
123 | static int cypress_hidcom_port_probe(struct usb_serial_port *port); | |
124 | static int cypress_ca42v2_port_probe(struct usb_serial_port *port); | |
125 | static int cypress_port_remove(struct usb_serial_port *port); | |
a509a7e4 | 126 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 AC |
127 | static void cypress_close(struct usb_serial_port *port); |
128 | static void cypress_dtr_rts(struct usb_serial_port *port, int on); | |
813a224f AC |
129 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
130 | const unsigned char *buf, int count); | |
131 | static void cypress_send(struct usb_serial_port *port); | |
132 | static int cypress_write_room(struct tty_struct *tty); | |
813a224f AC |
133 | static void cypress_set_termios(struct tty_struct *tty, |
134 | struct usb_serial_port *port, struct ktermios *old); | |
60b33c13 | 135 | static int cypress_tiocmget(struct tty_struct *tty); |
20b9d177 | 136 | static int cypress_tiocmset(struct tty_struct *tty, |
813a224f AC |
137 | unsigned int set, unsigned int clear); |
138 | static int cypress_chars_in_buffer(struct tty_struct *tty); | |
139 | static void cypress_throttle(struct tty_struct *tty); | |
140 | static void cypress_unthrottle(struct tty_struct *tty); | |
141 | static void cypress_set_dead(struct usb_serial_port *port); | |
142 | static void cypress_read_int_callback(struct urb *urb); | |
143 | static void cypress_write_int_callback(struct urb *urb); | |
1da177e4 | 144 | |
ea65370d | 145 | static struct usb_serial_driver cypress_earthmate_device = { |
18fcac35 GKH |
146 | .driver = { |
147 | .owner = THIS_MODULE, | |
269bda1c | 148 | .name = "earthmate", |
18fcac35 | 149 | }, |
269bda1c | 150 | .description = "DeLorme Earthmate USB", |
1da177e4 | 151 | .id_table = id_table_earthmate, |
1da177e4 | 152 | .num_ports = 1, |
5c1a0f41 JH |
153 | .port_probe = cypress_earthmate_port_probe, |
154 | .port_remove = cypress_port_remove, | |
1da177e4 LT |
155 | .open = cypress_open, |
156 | .close = cypress_close, | |
335f8514 | 157 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
158 | .write = cypress_write, |
159 | .write_room = cypress_write_room, | |
1da177e4 LT |
160 | .set_termios = cypress_set_termios, |
161 | .tiocmget = cypress_tiocmget, | |
162 | .tiocmset = cypress_tiocmset, | |
ab62a585 | 163 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
1da177e4 LT |
164 | .chars_in_buffer = cypress_chars_in_buffer, |
165 | .throttle = cypress_throttle, | |
166 | .unthrottle = cypress_unthrottle, | |
167 | .read_int_callback = cypress_read_int_callback, | |
168 | .write_int_callback = cypress_write_int_callback, | |
169 | }; | |
170 | ||
ea65370d | 171 | static struct usb_serial_driver cypress_hidcom_device = { |
18fcac35 GKH |
172 | .driver = { |
173 | .owner = THIS_MODULE, | |
269bda1c | 174 | .name = "cyphidcom", |
18fcac35 | 175 | }, |
269bda1c | 176 | .description = "HID->COM RS232 Adapter", |
1da177e4 | 177 | .id_table = id_table_cyphidcomrs232, |
1da177e4 | 178 | .num_ports = 1, |
5c1a0f41 JH |
179 | .port_probe = cypress_hidcom_port_probe, |
180 | .port_remove = cypress_port_remove, | |
1da177e4 LT |
181 | .open = cypress_open, |
182 | .close = cypress_close, | |
335f8514 | 183 | .dtr_rts = cypress_dtr_rts, |
1da177e4 LT |
184 | .write = cypress_write, |
185 | .write_room = cypress_write_room, | |
1da177e4 LT |
186 | .set_termios = cypress_set_termios, |
187 | .tiocmget = cypress_tiocmget, | |
188 | .tiocmset = cypress_tiocmset, | |
ab62a585 | 189 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
1da177e4 LT |
190 | .chars_in_buffer = cypress_chars_in_buffer, |
191 | .throttle = cypress_throttle, | |
192 | .unthrottle = cypress_unthrottle, | |
193 | .read_int_callback = cypress_read_int_callback, | |
194 | .write_int_callback = cypress_write_int_callback, | |
195 | }; | |
196 | ||
a5c44e29 LM |
197 | static struct usb_serial_driver cypress_ca42v2_device = { |
198 | .driver = { | |
199 | .owner = THIS_MODULE, | |
813a224f | 200 | .name = "nokiaca42v2", |
a5c44e29 LM |
201 | }, |
202 | .description = "Nokia CA-42 V2 Adapter", | |
203 | .id_table = id_table_nokiaca42v2, | |
a5c44e29 | 204 | .num_ports = 1, |
5c1a0f41 JH |
205 | .port_probe = cypress_ca42v2_port_probe, |
206 | .port_remove = cypress_port_remove, | |
a5c44e29 LM |
207 | .open = cypress_open, |
208 | .close = cypress_close, | |
335f8514 | 209 | .dtr_rts = cypress_dtr_rts, |
a5c44e29 LM |
210 | .write = cypress_write, |
211 | .write_room = cypress_write_room, | |
a5c44e29 LM |
212 | .set_termios = cypress_set_termios, |
213 | .tiocmget = cypress_tiocmget, | |
214 | .tiocmset = cypress_tiocmset, | |
ab62a585 | 215 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
a5c44e29 LM |
216 | .chars_in_buffer = cypress_chars_in_buffer, |
217 | .throttle = cypress_throttle, | |
218 | .unthrottle = cypress_unthrottle, | |
219 | .read_int_callback = cypress_read_int_callback, | |
220 | .write_int_callback = cypress_write_int_callback, | |
221 | }; | |
1da177e4 | 222 | |
08a4f6bc AS |
223 | static struct usb_serial_driver * const serial_drivers[] = { |
224 | &cypress_earthmate_device, &cypress_hidcom_device, | |
225 | &cypress_ca42v2_device, NULL | |
226 | }; | |
227 | ||
1da177e4 LT |
228 | /***************************************************************************** |
229 | * Cypress serial helper functions | |
230 | *****************************************************************************/ | |
231 | ||
6529591e RB |
232 | /* FRWD Dongle hidcom needs to skip reset and speed checks */ |
233 | static inline bool is_frwd(struct usb_device *dev) | |
234 | { | |
235 | return ((le16_to_cpu(dev->descriptor.idVendor) == VENDOR_ID_FRWD) && | |
236 | (le16_to_cpu(dev->descriptor.idProduct) == PRODUCT_ID_CYPHIDCOM_FRWD)); | |
237 | } | |
1da177e4 | 238 | |
8873aaa6 | 239 | static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate) |
92983c21 | 240 | { |
92983c21 MI |
241 | struct cypress_private *priv; |
242 | priv = usb_get_serial_port_data(port); | |
243 | ||
c312659c MF |
244 | if (unstable_bauds) |
245 | return new_rate; | |
246 | ||
6529591e RB |
247 | /* FRWD Dongle uses 115200 bps */ |
248 | if (is_frwd(port->serial->dev)) | |
249 | return new_rate; | |
250 | ||
92983c21 MI |
251 | /* |
252 | * The general purpose firmware for the Cypress M8 allows for | |
253 | * a maximum speed of 57600bps (I have no idea whether DeLorme | |
254 | * chose to use the general purpose firmware or not), if you | |
255 | * need to modify this speed setting for your own project | |
256 | * please add your own chiptype and modify the code likewise. | |
257 | * The Cypress HID->COM device will work successfully up to | |
258 | * 115200bps (but the actual throughput is around 3kBps). | |
259 | */ | |
92983c21 MI |
260 | if (port->serial->dev->speed == USB_SPEED_LOW) { |
261 | /* | |
262 | * Mike Isely <isely@pobox.com> 2-Feb-2008: The | |
263 | * Cypress app note that describes this mechanism | |
264 | * states the the low-speed part can't handle more | |
265 | * than 800 bytes/sec, in which case 4800 baud is the | |
266 | * safest speed for a part like that. | |
267 | */ | |
268 | if (new_rate > 4800) { | |
dfa1c315 GKH |
269 | dev_dbg(&port->dev, |
270 | "%s - failed setting baud rate, device incapable speed %d\n", | |
271 | __func__, new_rate); | |
92983c21 MI |
272 | return -1; |
273 | } | |
274 | } | |
275 | switch (priv->chiptype) { | |
276 | case CT_EARTHMATE: | |
277 | if (new_rate <= 600) { | |
278 | /* 300 and 600 baud rates are supported under | |
279 | * the generic firmware, but are not used with | |
280 | * NMEA and SiRF protocols */ | |
dfa1c315 | 281 | dev_dbg(&port->dev, |
d9a38a87 | 282 | "%s - failed setting baud rate, unsupported speed of %d on Earthmate GPS\n", |
dfa1c315 | 283 | __func__, new_rate); |
92983c21 MI |
284 | return -1; |
285 | } | |
286 | break; | |
287 | default: | |
288 | break; | |
289 | } | |
290 | return new_rate; | |
291 | } | |
292 | ||
293 | ||
093cf723 | 294 | /* This function can either set or retrieve the current serial line settings */ |
813a224f | 295 | static int cypress_serial_control(struct tty_struct *tty, |
95da310e AC |
296 | struct usb_serial_port *port, speed_t baud_rate, int data_bits, |
297 | int stop_bits, int parity_enable, int parity_type, int reset, | |
298 | int cypress_request_type) | |
1da177e4 | 299 | { |
3cb4a4f7 | 300 | int new_baudrate = 0, retval = 0, tries = 0; |
1da177e4 | 301 | struct cypress_private *priv; |
dfa1c315 | 302 | struct device *dev = &port->dev; |
0954644b JH |
303 | u8 *feature_buffer; |
304 | const unsigned int feature_len = 5; | |
1da177e4 LT |
305 | unsigned long flags; |
306 | ||
1da177e4 LT |
307 | priv = usb_get_serial_port_data(port); |
308 | ||
78aef519 MI |
309 | if (!priv->comm_is_ok) |
310 | return -ENODEV; | |
311 | ||
0954644b JH |
312 | feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL); |
313 | if (!feature_buffer) | |
314 | return -ENOMEM; | |
315 | ||
813a224f AC |
316 | switch (cypress_request_type) { |
317 | case CYPRESS_SET_CONFIG: | |
813a224f | 318 | /* 0 means 'Hang up' so doesn't change the true bit rate */ |
2805eb13 MF |
319 | new_baudrate = priv->baud_rate; |
320 | if (baud_rate && baud_rate != priv->baud_rate) { | |
dfa1c315 | 321 | dev_dbg(dev, "%s - baud rate is changing\n", __func__); |
813a224f | 322 | retval = analyze_baud_rate(port, baud_rate); |
2805eb13 | 323 | if (retval >= 0) { |
813a224f | 324 | new_baudrate = retval; |
dfa1c315 GKH |
325 | dev_dbg(dev, "%s - New baud rate set to %d\n", |
326 | __func__, new_baudrate); | |
1da177e4 | 327 | } |
813a224f | 328 | } |
dfa1c315 GKH |
329 | dev_dbg(dev, "%s - baud rate is being sent as %d\n", __func__, |
330 | new_baudrate); | |
813a224f | 331 | |
813a224f | 332 | /* fill the feature_buffer with new configuration */ |
0f2c2d7b | 333 | put_unaligned_le32(new_baudrate, feature_buffer); |
813a224f AC |
334 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
335 | /* 1 bit gap */ | |
336 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ | |
337 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ | |
338 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ | |
339 | /* 1 bit gap */ | |
340 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ | |
341 | ||
dfa1c315 GKH |
342 | dev_dbg(dev, "%s - device is being sent this feature report:\n", __func__); |
343 | dev_dbg(dev, "%s - %02X - %02X - %02X - %02X - %02X\n", __func__, | |
813a224f AC |
344 | feature_buffer[0], feature_buffer[1], |
345 | feature_buffer[2], feature_buffer[3], | |
346 | feature_buffer[4]); | |
347 | ||
348 | do { | |
349 | retval = usb_control_msg(port->serial->dev, | |
350 | usb_sndctrlpipe(port->serial->dev, 0), | |
351 | HID_REQ_SET_REPORT, | |
352 | USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
353 | 0x0300, 0, feature_buffer, | |
0954644b | 354 | feature_len, 500); |
813a224f AC |
355 | |
356 | if (tries++ >= 3) | |
357 | break; | |
358 | ||
0954644b | 359 | } while (retval != feature_len && |
813a224f AC |
360 | retval != -ENODEV); |
361 | ||
0954644b | 362 | if (retval != feature_len) { |
dfa1c315 GKH |
363 | dev_err(dev, "%s - failed sending serial line settings - %d\n", |
364 | __func__, retval); | |
813a224f AC |
365 | cypress_set_dead(port); |
366 | } else { | |
367 | spin_lock_irqsave(&priv->lock, flags); | |
368 | priv->baud_rate = new_baudrate; | |
369 | priv->current_config = feature_buffer[4]; | |
370 | spin_unlock_irqrestore(&priv->lock, flags); | |
371 | /* If we asked for a speed change encode it */ | |
372 | if (baud_rate) | |
373 | tty_encode_baud_rate(tty, | |
374 | new_baudrate, new_baudrate); | |
375 | } | |
376 | break; | |
377 | case CYPRESS_GET_CONFIG: | |
378 | if (priv->get_cfg_unsafe) { | |
379 | /* Not implemented for this device, | |
380 | and if we try to do it we're likely | |
381 | to crash the hardware. */ | |
0954644b JH |
382 | retval = -ENOTTY; |
383 | goto out; | |
813a224f | 384 | } |
dfa1c315 | 385 | dev_dbg(dev, "%s - retreiving serial line settings\n", __func__); |
813a224f AC |
386 | do { |
387 | retval = usb_control_msg(port->serial->dev, | |
388 | usb_rcvctrlpipe(port->serial->dev, 0), | |
389 | HID_REQ_GET_REPORT, | |
390 | USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, | |
391 | 0x0300, 0, feature_buffer, | |
0954644b | 392 | feature_len, 500); |
813a224f AC |
393 | |
394 | if (tries++ >= 3) | |
395 | break; | |
0954644b | 396 | } while (retval != feature_len |
813a224f AC |
397 | && retval != -ENODEV); |
398 | ||
0954644b | 399 | if (retval != feature_len) { |
dfa1c315 GKH |
400 | dev_err(dev, "%s - failed to retrieve serial line settings - %d\n", |
401 | __func__, retval); | |
813a224f | 402 | cypress_set_dead(port); |
0954644b | 403 | goto out; |
813a224f AC |
404 | } else { |
405 | spin_lock_irqsave(&priv->lock, flags); | |
406 | /* store the config in one byte, and later | |
407 | use bit masks to check values */ | |
408 | priv->current_config = feature_buffer[4]; | |
0f2c2d7b | 409 | priv->baud_rate = get_unaligned_le32(feature_buffer); |
813a224f AC |
410 | spin_unlock_irqrestore(&priv->lock, flags); |
411 | } | |
1da177e4 | 412 | } |
3cb4a4f7 LM |
413 | spin_lock_irqsave(&priv->lock, flags); |
414 | ++priv->cmd_count; | |
415 | spin_unlock_irqrestore(&priv->lock, flags); | |
0954644b JH |
416 | out: |
417 | kfree(feature_buffer); | |
1da177e4 LT |
418 | return retval; |
419 | } /* cypress_serial_control */ | |
420 | ||
421 | ||
78aef519 MI |
422 | static void cypress_set_dead(struct usb_serial_port *port) |
423 | { | |
424 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
425 | unsigned long flags; | |
426 | ||
427 | spin_lock_irqsave(&priv->lock, flags); | |
428 | if (!priv->comm_is_ok) { | |
429 | spin_unlock_irqrestore(&priv->lock, flags); | |
430 | return; | |
431 | } | |
432 | priv->comm_is_ok = 0; | |
433 | spin_unlock_irqrestore(&priv->lock, flags); | |
434 | ||
194343d9 | 435 | dev_err(&port->dev, "cypress_m8 suspending failing port %d - " |
1143832e | 436 | "interval might be too short\n", port->port_number); |
78aef519 MI |
437 | } |
438 | ||
439 | ||
1da177e4 LT |
440 | /***************************************************************************** |
441 | * Cypress serial driver functions | |
442 | *****************************************************************************/ | |
443 | ||
444 | ||
5c1a0f41 | 445 | static int cypress_generic_port_probe(struct usb_serial_port *port) |
1da177e4 | 446 | { |
5c1a0f41 | 447 | struct usb_serial *serial = port->serial; |
1da177e4 LT |
448 | struct cypress_private *priv; |
449 | ||
c55aee1b ON |
450 | if (!port->interrupt_out_urb || !port->interrupt_in_urb) { |
451 | dev_err(&port->dev, "required endpoint is missing\n"); | |
452 | return -ENODEV; | |
453 | } | |
454 | ||
813a224f | 455 | priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL); |
1da177e4 LT |
456 | if (!priv) |
457 | return -ENOMEM; | |
458 | ||
78aef519 | 459 | priv->comm_is_ok = !0; |
1da177e4 | 460 | spin_lock_init(&priv->lock); |
117fb8d0 | 461 | if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) { |
1da177e4 LT |
462 | kfree(priv); |
463 | return -ENOMEM; | |
464 | } | |
813a224f | 465 | |
6529591e RB |
466 | /* Skip reset for FRWD device. It is a workaound: |
467 | device hangs if it receives SET_CONFIGURE in Configured | |
468 | state. */ | |
469 | if (!is_frwd(serial->dev)) | |
470 | usb_reset_configuration(serial->dev); | |
813a224f | 471 | |
1da177e4 LT |
472 | priv->cmd_ctrl = 0; |
473 | priv->line_control = 0; | |
474 | priv->termios_initialized = 0; | |
1da177e4 | 475 | priv->rx_flags = 0; |
3416eaa1 MI |
476 | /* Default packet format setting is determined by packet size. |
477 | Anything with a size larger then 9 must have a separate | |
478 | count field since the 3 bit count field is otherwise too | |
479 | small. Otherwise we can use the slightly more compact | |
480 | format. This is in accordance with the cypress_m8 serial | |
481 | converter app note. */ | |
813a224f | 482 | if (port->interrupt_out_size > 9) |
3416eaa1 | 483 | priv->pkt_fmt = packet_format_1; |
813a224f | 484 | else |
3416eaa1 | 485 | priv->pkt_fmt = packet_format_2; |
813a224f | 486 | |
0257fa9f MI |
487 | if (interval > 0) { |
488 | priv->write_urb_interval = interval; | |
489 | priv->read_urb_interval = interval; | |
dfa1c315 GKH |
490 | dev_dbg(&port->dev, "%s - read & write intervals forced to %d\n", |
491 | __func__, interval); | |
0257fa9f MI |
492 | } else { |
493 | priv->write_urb_interval = port->interrupt_out_urb->interval; | |
494 | priv->read_urb_interval = port->interrupt_in_urb->interval; | |
dfa1c315 GKH |
495 | dev_dbg(&port->dev, "%s - intervals: read=%d write=%d\n", |
496 | __func__, priv->read_urb_interval, | |
497 | priv->write_urb_interval); | |
0257fa9f MI |
498 | } |
499 | usb_set_serial_port_data(port, priv); | |
813a224f | 500 | |
d7be6221 JH |
501 | port->port.drain_delay = 256; |
502 | ||
b9db07fb LM |
503 | return 0; |
504 | } | |
1da177e4 LT |
505 | |
506 | ||
5c1a0f41 | 507 | static int cypress_earthmate_port_probe(struct usb_serial_port *port) |
1da177e4 | 508 | { |
5c1a0f41 | 509 | struct usb_serial *serial = port->serial; |
1da177e4 | 510 | struct cypress_private *priv; |
5c1a0f41 | 511 | int ret; |
1da177e4 | 512 | |
5c1a0f41 JH |
513 | ret = cypress_generic_port_probe(port); |
514 | if (ret) { | |
dfa1c315 | 515 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 516 | return ret; |
1da177e4 LT |
517 | } |
518 | ||
3d6aa320 | 519 | priv = usb_get_serial_port_data(port); |
1da177e4 | 520 | priv->chiptype = CT_EARTHMATE; |
3416eaa1 MI |
521 | /* All Earthmate devices use the separated-count packet |
522 | format! Idiotic. */ | |
523 | priv->pkt_fmt = packet_format_1; | |
813a224f AC |
524 | if (serial->dev->descriptor.idProduct != |
525 | cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) { | |
3d6aa320 MI |
526 | /* The old original USB Earthmate seemed able to |
527 | handle GET_CONFIG requests; everything they've | |
528 | produced since that time crashes if this command is | |
529 | attempted :-( */ | |
dfa1c315 GKH |
530 | dev_dbg(&port->dev, |
531 | "%s - Marking this device as unsafe for GET_CONFIG commands\n", | |
532 | __func__); | |
3d6aa320 MI |
533 | priv->get_cfg_unsafe = !0; |
534 | } | |
b9db07fb LM |
535 | |
536 | return 0; | |
5c1a0f41 | 537 | } |
1da177e4 | 538 | |
5c1a0f41 | 539 | static int cypress_hidcom_port_probe(struct usb_serial_port *port) |
1da177e4 LT |
540 | { |
541 | struct cypress_private *priv; | |
5c1a0f41 | 542 | int ret; |
1da177e4 | 543 | |
5c1a0f41 JH |
544 | ret = cypress_generic_port_probe(port); |
545 | if (ret) { | |
dfa1c315 | 546 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 547 | return ret; |
1da177e4 LT |
548 | } |
549 | ||
dfa1c315 | 550 | priv = usb_get_serial_port_data(port); |
1da177e4 | 551 | priv->chiptype = CT_CYPHIDCOM; |
813a224f | 552 | |
b9db07fb | 553 | return 0; |
5c1a0f41 | 554 | } |
1da177e4 | 555 | |
5c1a0f41 | 556 | static int cypress_ca42v2_port_probe(struct usb_serial_port *port) |
a5c44e29 LM |
557 | { |
558 | struct cypress_private *priv; | |
5c1a0f41 | 559 | int ret; |
a5c44e29 | 560 | |
5c1a0f41 JH |
561 | ret = cypress_generic_port_probe(port); |
562 | if (ret) { | |
dfa1c315 | 563 | dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__); |
5c1a0f41 | 564 | return ret; |
a5c44e29 LM |
565 | } |
566 | ||
dfa1c315 | 567 | priv = usb_get_serial_port_data(port); |
a5c44e29 LM |
568 | priv->chiptype = CT_CA42V2; |
569 | ||
570 | return 0; | |
5c1a0f41 | 571 | } |
a5c44e29 | 572 | |
5c1a0f41 | 573 | static int cypress_port_remove(struct usb_serial_port *port) |
1da177e4 LT |
574 | { |
575 | struct cypress_private *priv; | |
576 | ||
5c1a0f41 | 577 | priv = usb_get_serial_port_data(port); |
1da177e4 | 578 | |
5c1a0f41 JH |
579 | kfifo_free(&priv->write_fifo); |
580 | kfree(priv); | |
1da177e4 | 581 | |
5c1a0f41 JH |
582 | return 0; |
583 | } | |
1da177e4 | 584 | |
a509a7e4 | 585 | static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 LT |
586 | { |
587 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
588 | struct usb_serial *serial = port->serial; | |
589 | unsigned long flags; | |
590 | int result = 0; | |
591 | ||
78aef519 MI |
592 | if (!priv->comm_is_ok) |
593 | return -EIO; | |
594 | ||
1da177e4 | 595 | /* clear halts before open */ |
1da177e4 LT |
596 | usb_clear_halt(serial->dev, 0x81); |
597 | usb_clear_halt(serial->dev, 0x02); | |
598 | ||
599 | spin_lock_irqsave(&priv->lock, flags); | |
600 | /* reset read/write statistics */ | |
601 | priv->bytes_in = 0; | |
602 | priv->bytes_out = 0; | |
603 | priv->cmd_count = 0; | |
604 | priv->rx_flags = 0; | |
605 | spin_unlock_irqrestore(&priv->lock, flags); | |
606 | ||
335f8514 | 607 | /* Set termios */ |
fe1ae7fd | 608 | cypress_send(port); |
1da177e4 | 609 | |
95da310e AC |
610 | if (tty) |
611 | cypress_set_termios(tty, port, &priv->tmp_termios); | |
1da177e4 LT |
612 | |
613 | /* setup the port and start reading from the device */ | |
1da177e4 LT |
614 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, |
615 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), | |
813a224f AC |
616 | port->interrupt_in_urb->transfer_buffer, |
617 | port->interrupt_in_urb->transfer_buffer_length, | |
0257fa9f | 618 | cypress_read_int_callback, port, priv->read_urb_interval); |
1da177e4 LT |
619 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
620 | ||
813a224f AC |
621 | if (result) { |
622 | dev_err(&port->dev, | |
623 | "%s - failed submitting read urb, error %d\n", | |
624 | __func__, result); | |
78aef519 | 625 | cypress_set_dead(port); |
1da177e4 | 626 | } |
d7be6221 | 627 | |
1da177e4 LT |
628 | return result; |
629 | } /* cypress_open */ | |
630 | ||
335f8514 AC |
631 | static void cypress_dtr_rts(struct usb_serial_port *port, int on) |
632 | { | |
633 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
634 | /* drop dtr and rts */ | |
335f8514 AC |
635 | spin_lock_irq(&priv->lock); |
636 | if (on == 0) | |
637 | priv->line_control = 0; | |
638 | else | |
639 | priv->line_control = CONTROL_DTR | CONTROL_RTS; | |
640 | priv->cmd_ctrl = 1; | |
641 | spin_unlock_irq(&priv->lock); | |
642 | cypress_write(NULL, port, NULL, 0); | |
643 | } | |
1da177e4 | 644 | |
335f8514 | 645 | static void cypress_close(struct usb_serial_port *port) |
1da177e4 LT |
646 | { |
647 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
117fb8d0 | 648 | unsigned long flags; |
1da177e4 | 649 | |
117fb8d0 JH |
650 | spin_lock_irqsave(&priv->lock, flags); |
651 | kfifo_reset_out(&priv->write_fifo); | |
652 | spin_unlock_irqrestore(&priv->lock, flags); | |
653 | ||
dfa1c315 | 654 | dev_dbg(&port->dev, "%s - stopping urbs\n", __func__); |
813a224f AC |
655 | usb_kill_urb(port->interrupt_in_urb); |
656 | usb_kill_urb(port->interrupt_out_urb); | |
1da177e4 | 657 | |
1da177e4 | 658 | if (stats) |
813a224f AC |
659 | dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
660 | priv->bytes_in, priv->bytes_out, priv->cmd_count); | |
1da177e4 LT |
661 | } /* cypress_close */ |
662 | ||
663 | ||
95da310e AC |
664 | static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, |
665 | const unsigned char *buf, int count) | |
1da177e4 LT |
666 | { |
667 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
813a224f | 668 | |
1143832e | 669 | dev_dbg(&port->dev, "%s - %d bytes\n", __func__, count); |
1da177e4 LT |
670 | |
671 | /* line control commands, which need to be executed immediately, | |
672 | are not put into the buffer for obvious reasons. | |
673 | */ | |
674 | if (priv->cmd_ctrl) { | |
675 | count = 0; | |
676 | goto finish; | |
677 | } | |
813a224f | 678 | |
1da177e4 LT |
679 | if (!count) |
680 | return count; | |
813a224f | 681 | |
117fb8d0 | 682 | count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock); |
1da177e4 LT |
683 | |
684 | finish: | |
685 | cypress_send(port); | |
686 | ||
687 | return count; | |
688 | } /* cypress_write */ | |
689 | ||
690 | ||
691 | static void cypress_send(struct usb_serial_port *port) | |
692 | { | |
693 | int count = 0, result, offset, actual_size; | |
694 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
dfa1c315 | 695 | struct device *dev = &port->dev; |
1da177e4 | 696 | unsigned long flags; |
813a224f | 697 | |
78aef519 MI |
698 | if (!priv->comm_is_ok) |
699 | return; | |
700 | ||
dfa1c315 GKH |
701 | dev_dbg(dev, "%s - interrupt out size is %d\n", __func__, |
702 | port->interrupt_out_size); | |
813a224f | 703 | |
1da177e4 LT |
704 | spin_lock_irqsave(&priv->lock, flags); |
705 | if (priv->write_urb_in_use) { | |
dfa1c315 | 706 | dev_dbg(dev, "%s - can't write, urb in use\n", __func__); |
1da177e4 LT |
707 | spin_unlock_irqrestore(&priv->lock, flags); |
708 | return; | |
709 | } | |
710 | spin_unlock_irqrestore(&priv->lock, flags); | |
711 | ||
712 | /* clear buffer */ | |
813a224f AC |
713 | memset(port->interrupt_out_urb->transfer_buffer, 0, |
714 | port->interrupt_out_size); | |
1da177e4 LT |
715 | |
716 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
717 | switch (priv->pkt_fmt) { |
718 | default: | |
719 | case packet_format_1: | |
720 | /* this is for the CY7C64013... */ | |
721 | offset = 2; | |
722 | port->interrupt_out_buffer[0] = priv->line_control; | |
723 | break; | |
724 | case packet_format_2: | |
725 | /* this is for the CY7C63743... */ | |
726 | offset = 1; | |
727 | port->interrupt_out_buffer[0] = priv->line_control; | |
728 | break; | |
1da177e4 LT |
729 | } |
730 | ||
731 | if (priv->line_control & CONTROL_RESET) | |
732 | priv->line_control &= ~CONTROL_RESET; | |
733 | ||
734 | if (priv->cmd_ctrl) { | |
735 | priv->cmd_count++; | |
dfa1c315 | 736 | dev_dbg(dev, "%s - line control command being issued\n", __func__); |
1da177e4 LT |
737 | spin_unlock_irqrestore(&priv->lock, flags); |
738 | goto send; | |
739 | } else | |
740 | spin_unlock_irqrestore(&priv->lock, flags); | |
741 | ||
117fb8d0 JH |
742 | count = kfifo_out_locked(&priv->write_fifo, |
743 | &port->interrupt_out_buffer[offset], | |
744 | port->interrupt_out_size - offset, | |
745 | &priv->lock); | |
813a224f | 746 | if (count == 0) |
1da177e4 | 747 | return; |
1da177e4 | 748 | |
3416eaa1 MI |
749 | switch (priv->pkt_fmt) { |
750 | default: | |
751 | case packet_format_1: | |
752 | port->interrupt_out_buffer[1] = count; | |
753 | break; | |
754 | case packet_format_2: | |
755 | port->interrupt_out_buffer[0] |= count; | |
1da177e4 LT |
756 | } |
757 | ||
dfa1c315 | 758 | dev_dbg(dev, "%s - count is %d\n", __func__, count); |
1da177e4 LT |
759 | |
760 | send: | |
761 | spin_lock_irqsave(&priv->lock, flags); | |
762 | priv->write_urb_in_use = 1; | |
763 | spin_unlock_irqrestore(&priv->lock, flags); | |
764 | ||
765 | if (priv->cmd_ctrl) | |
766 | actual_size = 1; | |
767 | else | |
3416eaa1 MI |
768 | actual_size = count + |
769 | (priv->pkt_fmt == packet_format_1 ? 2 : 1); | |
770 | ||
59d33f2f GKH |
771 | usb_serial_debug_data(dev, __func__, port->interrupt_out_size, |
772 | port->interrupt_out_urb->transfer_buffer); | |
1da177e4 | 773 | |
9aa8dae7 MI |
774 | usb_fill_int_urb(port->interrupt_out_urb, port->serial->dev, |
775 | usb_sndintpipe(port->serial->dev, port->interrupt_out_endpointAddress), | |
776 | port->interrupt_out_buffer, port->interrupt_out_size, | |
777 | cypress_write_int_callback, port, priv->write_urb_interval); | |
813a224f | 778 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
1da177e4 | 779 | if (result) { |
22a416c4 | 780 | dev_err_console(port, |
813a224f AC |
781 | "%s - failed submitting write urb, error %d\n", |
782 | __func__, result); | |
1da177e4 | 783 | priv->write_urb_in_use = 0; |
78aef519 | 784 | cypress_set_dead(port); |
1da177e4 LT |
785 | } |
786 | ||
787 | spin_lock_irqsave(&priv->lock, flags); | |
813a224f | 788 | if (priv->cmd_ctrl) |
1da177e4 | 789 | priv->cmd_ctrl = 0; |
813a224f AC |
790 | |
791 | /* do not count the line control and size bytes */ | |
792 | priv->bytes_out += count; | |
1da177e4 LT |
793 | spin_unlock_irqrestore(&priv->lock, flags); |
794 | ||
cf2c7481 | 795 | usb_serial_port_softint(port); |
1da177e4 LT |
796 | } /* cypress_send */ |
797 | ||
798 | ||
799 | /* returns how much space is available in the soft buffer */ | |
95da310e | 800 | static int cypress_write_room(struct tty_struct *tty) |
1da177e4 | 801 | { |
95da310e | 802 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
803 | struct cypress_private *priv = usb_get_serial_port_data(port); |
804 | int room = 0; | |
805 | unsigned long flags; | |
806 | ||
1da177e4 | 807 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 808 | room = kfifo_avail(&priv->write_fifo); |
1da177e4 LT |
809 | spin_unlock_irqrestore(&priv->lock, flags); |
810 | ||
dfa1c315 | 811 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
1da177e4 LT |
812 | return room; |
813 | } | |
814 | ||
815 | ||
60b33c13 | 816 | static int cypress_tiocmget(struct tty_struct *tty) |
1da177e4 | 817 | { |
95da310e | 818 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
819 | struct cypress_private *priv = usb_get_serial_port_data(port); |
820 | __u8 status, control; | |
821 | unsigned int result = 0; | |
822 | unsigned long flags; | |
813a224f | 823 | |
1da177e4 LT |
824 | spin_lock_irqsave(&priv->lock, flags); |
825 | control = priv->line_control; | |
826 | status = priv->current_status; | |
827 | spin_unlock_irqrestore(&priv->lock, flags); | |
828 | ||
829 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
830 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
831 | | ((status & UART_CTS) ? TIOCM_CTS : 0) | |
832 | | ((status & UART_DSR) ? TIOCM_DSR : 0) | |
833 | | ((status & UART_RI) ? TIOCM_RI : 0) | |
834 | | ((status & UART_CD) ? TIOCM_CD : 0); | |
835 | ||
dfa1c315 | 836 | dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); |
1da177e4 LT |
837 | |
838 | return result; | |
839 | } | |
840 | ||
841 | ||
20b9d177 | 842 | static int cypress_tiocmset(struct tty_struct *tty, |
1da177e4 LT |
843 | unsigned int set, unsigned int clear) |
844 | { | |
95da310e | 845 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
846 | struct cypress_private *priv = usb_get_serial_port_data(port); |
847 | unsigned long flags; | |
813a224f | 848 | |
1da177e4 LT |
849 | spin_lock_irqsave(&priv->lock, flags); |
850 | if (set & TIOCM_RTS) | |
851 | priv->line_control |= CONTROL_RTS; | |
852 | if (set & TIOCM_DTR) | |
853 | priv->line_control |= CONTROL_DTR; | |
854 | if (clear & TIOCM_RTS) | |
855 | priv->line_control &= ~CONTROL_RTS; | |
856 | if (clear & TIOCM_DTR) | |
857 | priv->line_control &= ~CONTROL_DTR; | |
8873aaa6 | 858 | priv->cmd_ctrl = 1; |
1da177e4 LT |
859 | spin_unlock_irqrestore(&priv->lock, flags); |
860 | ||
95da310e | 861 | return cypress_write(tty, port, NULL, 0); |
1da177e4 LT |
862 | } |
863 | ||
95da310e AC |
864 | static void cypress_set_termios(struct tty_struct *tty, |
865 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1da177e4 LT |
866 | { |
867 | struct cypress_private *priv = usb_get_serial_port_data(port); | |
dfa1c315 | 868 | struct device *dev = &port->dev; |
1da177e4 | 869 | int data_bits, stop_bits, parity_type, parity_enable; |
8873aaa6 | 870 | unsigned cflag, iflag; |
1da177e4 LT |
871 | unsigned long flags; |
872 | __u8 oldlines; | |
3cb4a4f7 | 873 | int linechange = 0; |
b9db07fb | 874 | |
1da177e4 | 875 | spin_lock_irqsave(&priv->lock, flags); |
fe1ae7fd AC |
876 | /* We can't clean this one up as we don't know the device type |
877 | early enough */ | |
1da177e4 LT |
878 | if (!priv->termios_initialized) { |
879 | if (priv->chiptype == CT_EARTHMATE) { | |
adc8d746 AC |
880 | tty->termios = tty_std_termios; |
881 | tty->termios.c_cflag = B4800 | CS8 | CREAD | HUPCL | | |
b9db07fb | 882 | CLOCAL; |
adc8d746 AC |
883 | tty->termios.c_ispeed = 4800; |
884 | tty->termios.c_ospeed = 4800; | |
1da177e4 | 885 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
adc8d746 AC |
886 | tty->termios = tty_std_termios; |
887 | tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
b9db07fb | 888 | CLOCAL; |
adc8d746 AC |
889 | tty->termios.c_ispeed = 9600; |
890 | tty->termios.c_ospeed = 9600; | |
a5c44e29 | 891 | } else if (priv->chiptype == CT_CA42V2) { |
adc8d746 AC |
892 | tty->termios = tty_std_termios; |
893 | tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
a5c44e29 | 894 | CLOCAL; |
adc8d746 AC |
895 | tty->termios.c_ispeed = 9600; |
896 | tty->termios.c_ospeed = 9600; | |
1da177e4 LT |
897 | } |
898 | priv->termios_initialized = 1; | |
899 | } | |
900 | spin_unlock_irqrestore(&priv->lock, flags); | |
901 | ||
8873aaa6 | 902 | /* Unsupported features need clearing */ |
adc8d746 | 903 | tty->termios.c_cflag &= ~(CMSPAR|CRTSCTS); |
8873aaa6 | 904 | |
adc8d746 AC |
905 | cflag = tty->termios.c_cflag; |
906 | iflag = tty->termios.c_iflag; | |
1da177e4 LT |
907 | |
908 | /* check if there are new settings */ | |
909 | if (old_termios) { | |
8873aaa6 | 910 | spin_lock_irqsave(&priv->lock, flags); |
adc8d746 | 911 | priv->tmp_termios = tty->termios; |
8873aaa6 AC |
912 | spin_unlock_irqrestore(&priv->lock, flags); |
913 | } | |
1da177e4 LT |
914 | |
915 | /* set number of data bits, parity, stop bits */ | |
916 | /* when parity is disabled the parity type bit is ignored */ | |
917 | ||
b9db07fb LM |
918 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
919 | stop_bits = cflag & CSTOPB ? 1 : 0; | |
920 | ||
1da177e4 LT |
921 | if (cflag & PARENB) { |
922 | parity_enable = 1; | |
b9db07fb LM |
923 | /* 1 means odd parity, 0 means even parity */ |
924 | parity_type = cflag & PARODD ? 1 : 0; | |
1da177e4 LT |
925 | } else |
926 | parity_enable = parity_type = 0; | |
927 | ||
77336828 AC |
928 | switch (cflag & CSIZE) { |
929 | case CS5: | |
930 | data_bits = 0; | |
931 | break; | |
932 | case CS6: | |
933 | data_bits = 1; | |
934 | break; | |
935 | case CS7: | |
936 | data_bits = 2; | |
937 | break; | |
938 | case CS8: | |
1da177e4 | 939 | data_bits = 3; |
77336828 AC |
940 | break; |
941 | default: | |
dfa1c315 | 942 | dev_err(dev, "%s - CSIZE was set, but not CS5-CS8\n", __func__); |
77336828 AC |
943 | data_bits = 3; |
944 | } | |
1da177e4 LT |
945 | spin_lock_irqsave(&priv->lock, flags); |
946 | oldlines = priv->line_control; | |
947 | if ((cflag & CBAUD) == B0) { | |
948 | /* drop dtr and rts */ | |
dfa1c315 | 949 | dev_dbg(dev, "%s - dropping the lines, baud rate 0bps\n", __func__); |
1da177e4 | 950 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
8873aaa6 | 951 | } else |
3cb4a4f7 | 952 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
1da177e4 | 953 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 954 | |
dfa1c315 GKH |
955 | dev_dbg(dev, "%s - sending %d stop_bits, %d parity_enable, %d parity_type, %d data_bits (+5)\n", |
956 | __func__, stop_bits, parity_enable, parity_type, data_bits); | |
b9db07fb | 957 | |
813a224f AC |
958 | cypress_serial_control(tty, port, tty_get_baud_rate(tty), |
959 | data_bits, stop_bits, | |
960 | parity_enable, parity_type, | |
961 | 0, CYPRESS_SET_CONFIG); | |
1da177e4 | 962 | |
b9db07fb LM |
963 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
964 | * filled into the private structure this should confirm that all is | |
965 | * working if it returns what we just set */ | |
95da310e | 966 | cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
1da177e4 | 967 | |
b9db07fb LM |
968 | /* Here we can define custom tty settings for devices; the main tty |
969 | * termios flag base comes from empeg.c */ | |
1da177e4 | 970 | |
b9db07fb | 971 | spin_lock_irqsave(&priv->lock, flags); |
813a224f | 972 | if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) { |
dfa1c315 | 973 | dev_dbg(dev, "Using custom termios settings for a baud rate of 4800bps.\n"); |
1da177e4 LT |
974 | /* define custom termios settings for NMEA protocol */ |
975 | ||
adc8d746 | 976 | tty->termios.c_iflag /* input modes - */ |
b9db07fb LM |
977 | &= ~(IGNBRK /* disable ignore break */ |
978 | | BRKINT /* disable break causes interrupt */ | |
979 | | PARMRK /* disable mark parity errors */ | |
980 | | ISTRIP /* disable clear high bit of input char */ | |
981 | | INLCR /* disable translate NL to CR */ | |
982 | | IGNCR /* disable ignore CR */ | |
983 | | ICRNL /* disable translate CR to NL */ | |
984 | | IXON); /* disable enable XON/XOFF flow control */ | |
985 | ||
adc8d746 | 986 | tty->termios.c_oflag /* output modes */ |
b9db07fb | 987 | &= ~OPOST; /* disable postprocess output char */ |
1da177e4 | 988 | |
adc8d746 | 989 | tty->termios.c_lflag /* line discipline modes */ |
b9db07fb LM |
990 | &= ~(ECHO /* disable echo input characters */ |
991 | | ECHONL /* disable echo new line */ | |
992 | | ICANON /* disable erase, kill, werase, and rprnt | |
993 | special characters */ | |
994 | | ISIG /* disable interrupt, quit, and suspend | |
995 | special characters */ | |
996 | | IEXTEN); /* disable non-POSIX special characters */ | |
3cb4a4f7 | 997 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
1da177e4 | 998 | |
1da177e4 LT |
999 | linechange = (priv->line_control != oldlines); |
1000 | spin_unlock_irqrestore(&priv->lock, flags); | |
1001 | ||
1002 | /* if necessary, set lines */ | |
3cb4a4f7 | 1003 | if (linechange) { |
1da177e4 | 1004 | priv->cmd_ctrl = 1; |
95da310e | 1005 | cypress_write(tty, port, NULL, 0); |
1da177e4 | 1006 | } |
1da177e4 LT |
1007 | } /* cypress_set_termios */ |
1008 | ||
b9db07fb | 1009 | |
1da177e4 | 1010 | /* returns amount of data still left in soft buffer */ |
95da310e | 1011 | static int cypress_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1012 | { |
95da310e | 1013 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1014 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1015 | int chars = 0; | |
1016 | unsigned long flags; | |
1017 | ||
1da177e4 | 1018 | spin_lock_irqsave(&priv->lock, flags); |
117fb8d0 | 1019 | chars = kfifo_len(&priv->write_fifo); |
1da177e4 LT |
1020 | spin_unlock_irqrestore(&priv->lock, flags); |
1021 | ||
dfa1c315 | 1022 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
1da177e4 LT |
1023 | return chars; |
1024 | } | |
1025 | ||
1026 | ||
95da310e | 1027 | static void cypress_throttle(struct tty_struct *tty) |
1da177e4 | 1028 | { |
95da310e | 1029 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1030 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1da177e4 | 1031 | |
63832515 | 1032 | spin_lock_irq(&priv->lock); |
1da177e4 | 1033 | priv->rx_flags = THROTTLED; |
63832515 | 1034 | spin_unlock_irq(&priv->lock); |
1da177e4 LT |
1035 | } |
1036 | ||
1037 | ||
95da310e | 1038 | static void cypress_unthrottle(struct tty_struct *tty) |
1da177e4 | 1039 | { |
95da310e | 1040 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1041 | struct cypress_private *priv = usb_get_serial_port_data(port); |
1042 | int actually_throttled, result; | |
1da177e4 | 1043 | |
63832515 | 1044 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
1045 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
1046 | priv->rx_flags = 0; | |
63832515 | 1047 | spin_unlock_irq(&priv->lock); |
1da177e4 | 1048 | |
78aef519 MI |
1049 | if (!priv->comm_is_ok) |
1050 | return; | |
1051 | ||
1da177e4 | 1052 | if (actually_throttled) { |
63832515 | 1053 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
78aef519 | 1054 | if (result) { |
b9db07fb | 1055 | dev_err(&port->dev, "%s - failed submitting read urb, " |
441b62c1 | 1056 | "error %d\n", __func__, result); |
78aef519 MI |
1057 | cypress_set_dead(port); |
1058 | } | |
1da177e4 LT |
1059 | } |
1060 | } | |
1061 | ||
1062 | ||
7d12e780 | 1063 | static void cypress_read_int_callback(struct urb *urb) |
1da177e4 | 1064 | { |
cdc97792 | 1065 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1066 | struct cypress_private *priv = usb_get_serial_port_data(port); |
dfa1c315 | 1067 | struct device *dev = &urb->dev->dev; |
1da177e4 LT |
1068 | struct tty_struct *tty; |
1069 | unsigned char *data = urb->transfer_buffer; | |
1070 | unsigned long flags; | |
b9db07fb | 1071 | char tty_flag = TTY_NORMAL; |
1da177e4 LT |
1072 | int havedata = 0; |
1073 | int bytes = 0; | |
1074 | int result; | |
1075 | int i = 0; | |
8d7bc55e | 1076 | int status = urb->status; |
1da177e4 | 1077 | |
8d7bc55e | 1078 | switch (status) { |
78aef519 MI |
1079 | case 0: /* success */ |
1080 | break; | |
1081 | case -ECONNRESET: | |
1082 | case -ENOENT: | |
1083 | case -ESHUTDOWN: | |
1084 | /* precursor to disconnect so just go away */ | |
1085 | return; | |
1086 | case -EPIPE: | |
4d2fae8b AS |
1087 | /* Can't call usb_clear_halt while in_interrupt */ |
1088 | /* FALLS THROUGH */ | |
78aef519 MI |
1089 | default: |
1090 | /* something ugly is going on... */ | |
dfa1c315 GKH |
1091 | dev_err(dev, "%s - unexpected nonzero read status received: %d\n", |
1092 | __func__, status); | |
78aef519 | 1093 | cypress_set_dead(port); |
1da177e4 LT |
1094 | return; |
1095 | } | |
1096 | ||
1097 | spin_lock_irqsave(&priv->lock, flags); | |
1098 | if (priv->rx_flags & THROTTLED) { | |
dfa1c315 | 1099 | dev_dbg(dev, "%s - now throttling\n", __func__); |
1da177e4 LT |
1100 | priv->rx_flags |= ACTUALLY_THROTTLED; |
1101 | spin_unlock_irqrestore(&priv->lock, flags); | |
1102 | return; | |
1103 | } | |
1104 | spin_unlock_irqrestore(&priv->lock, flags); | |
1105 | ||
4a90f09b | 1106 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 1107 | if (!tty) { |
dfa1c315 | 1108 | dev_dbg(dev, "%s - bad tty pointer - exiting\n", __func__); |
1da177e4 LT |
1109 | return; |
1110 | } | |
1111 | ||
1112 | spin_lock_irqsave(&priv->lock, flags); | |
3416eaa1 MI |
1113 | result = urb->actual_length; |
1114 | switch (priv->pkt_fmt) { | |
1115 | default: | |
1116 | case packet_format_1: | |
1117 | /* This is for the CY7C64013... */ | |
1118 | priv->current_status = data[0] & 0xF8; | |
1119 | bytes = data[1] + 2; | |
1120 | i = 2; | |
1121 | if (bytes > 2) | |
1122 | havedata = 1; | |
1123 | break; | |
1124 | case packet_format_2: | |
1125 | /* This is for the CY7C63743... */ | |
1126 | priv->current_status = data[0] & 0xF8; | |
1127 | bytes = (data[0] & 0x07) + 1; | |
1128 | i = 1; | |
1129 | if (bytes > 1) | |
1130 | havedata = 1; | |
1131 | break; | |
1da177e4 LT |
1132 | } |
1133 | spin_unlock_irqrestore(&priv->lock, flags); | |
3416eaa1 | 1134 | if (result < bytes) { |
dfa1c315 GKH |
1135 | dev_dbg(dev, |
1136 | "%s - wrong packet size - received %d bytes but packet said %d bytes\n", | |
1137 | __func__, result, bytes); | |
3416eaa1 MI |
1138 | goto continue_read; |
1139 | } | |
1da177e4 | 1140 | |
59d33f2f | 1141 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
1da177e4 LT |
1142 | |
1143 | spin_lock_irqsave(&priv->lock, flags); | |
1144 | /* check to see if status has changed */ | |
6768306c | 1145 | if (priv->current_status != priv->prev_status) { |
ab62a585 JH |
1146 | u8 delta = priv->current_status ^ priv->prev_status; |
1147 | ||
1148 | if (delta & UART_MSR_MASK) { | |
1149 | if (delta & UART_CTS) | |
1150 | port->icount.cts++; | |
1151 | if (delta & UART_DSR) | |
1152 | port->icount.dsr++; | |
1153 | if (delta & UART_RI) | |
1154 | port->icount.rng++; | |
1155 | if (delta & UART_CD) | |
1156 | port->icount.dcd++; | |
7603381e | 1157 | |
7603381e | 1158 | wake_up_interruptible(&port->port.delta_msr_wait); |
ab62a585 | 1159 | } |
7603381e | 1160 | |
6768306c | 1161 | priv->prev_status = priv->current_status; |
1da177e4 | 1162 | } |
b9db07fb | 1163 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 1164 | |
b9db07fb LM |
1165 | /* hangup, as defined in acm.c... this might be a bad place for it |
1166 | * though */ | |
9db276f8 | 1167 | if (tty && !C_CLOCAL(tty) && !(priv->current_status & UART_CD)) { |
dfa1c315 | 1168 | dev_dbg(dev, "%s - calling hangup\n", __func__); |
1da177e4 LT |
1169 | tty_hangup(tty); |
1170 | goto continue_read; | |
1171 | } | |
1172 | ||
b9db07fb LM |
1173 | /* There is one error bit... I'm assuming it is a parity error |
1174 | * indicator as the generic firmware will set this bit to 1 if a | |
1175 | * parity error occurs. | |
1176 | * I can not find reference to any other error events. */ | |
1da177e4 LT |
1177 | spin_lock_irqsave(&priv->lock, flags); |
1178 | if (priv->current_status & CYP_ERROR) { | |
1179 | spin_unlock_irqrestore(&priv->lock, flags); | |
1180 | tty_flag = TTY_PARITY; | |
dfa1c315 | 1181 | dev_dbg(dev, "%s - Parity Error detected\n", __func__); |
1da177e4 LT |
1182 | } else |
1183 | spin_unlock_irqrestore(&priv->lock, flags); | |
1184 | ||
1185 | /* process read if there is data other than line status */ | |
2e124b4a | 1186 | if (bytes > i) { |
2f693357 | 1187 | tty_insert_flip_string_fixed_flag(&port->port, data + i, |
70ced221 | 1188 | tty_flag, bytes - i); |
2e124b4a | 1189 | tty_flip_buffer_push(&port->port); |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | spin_lock_irqsave(&priv->lock, flags); | |
b9db07fb LM |
1193 | /* control and status byte(s) are also counted */ |
1194 | priv->bytes_in += bytes; | |
1da177e4 LT |
1195 | spin_unlock_irqrestore(&priv->lock, flags); |
1196 | ||
1197 | continue_read: | |
4a90f09b | 1198 | tty_kref_put(tty); |
b9db07fb | 1199 | |
1f87158e | 1200 | /* Continue trying to always read */ |
1da177e4 | 1201 | |
1f87158e | 1202 | if (priv->comm_is_ok) { |
b9db07fb LM |
1203 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
1204 | usb_rcvintpipe(port->serial->dev, | |
1205 | port->interrupt_in_endpointAddress), | |
1206 | port->interrupt_in_urb->transfer_buffer, | |
1207 | port->interrupt_in_urb->transfer_buffer_length, | |
813a224f AC |
1208 | cypress_read_int_callback, port, |
1209 | priv->read_urb_interval); | |
b9db07fb | 1210 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
1f87158e | 1211 | if (result && result != -EPERM) { |
dfa1c315 GKH |
1212 | dev_err(dev, "%s - failed resubmitting read urb, error %d\n", |
1213 | __func__, result); | |
78aef519 MI |
1214 | cypress_set_dead(port); |
1215 | } | |
1da177e4 | 1216 | } |
1da177e4 LT |
1217 | } /* cypress_read_int_callback */ |
1218 | ||
1219 | ||
7d12e780 | 1220 | static void cypress_write_int_callback(struct urb *urb) |
1da177e4 | 1221 | { |
cdc97792 | 1222 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1223 | struct cypress_private *priv = usb_get_serial_port_data(port); |
dfa1c315 | 1224 | struct device *dev = &urb->dev->dev; |
8d7bc55e | 1225 | int status = urb->status; |
1da177e4 | 1226 | |
8d7bc55e | 1227 | switch (status) { |
813a224f AC |
1228 | case 0: |
1229 | /* success */ | |
1230 | break; | |
1231 | case -ECONNRESET: | |
1232 | case -ENOENT: | |
1233 | case -ESHUTDOWN: | |
1234 | /* this urb is terminated, clean up */ | |
dfa1c315 GKH |
1235 | dev_dbg(dev, "%s - urb shutting down with status: %d\n", |
1236 | __func__, status); | |
813a224f AC |
1237 | priv->write_urb_in_use = 0; |
1238 | return; | |
d7c933ae JH |
1239 | case -EPIPE: |
1240 | /* Cannot call usb_clear_halt while in_interrupt */ | |
1241 | /* FALLTHROUGH */ | |
813a224f | 1242 | default: |
dfa1c315 GKH |
1243 | dev_err(dev, "%s - unexpected nonzero write status received: %d\n", |
1244 | __func__, status); | |
813a224f AC |
1245 | cypress_set_dead(port); |
1246 | break; | |
1da177e4 | 1247 | } |
1da177e4 | 1248 | priv->write_urb_in_use = 0; |
813a224f | 1249 | |
1da177e4 LT |
1250 | /* send any buffered data */ |
1251 | cypress_send(port); | |
1252 | } | |
1253 | ||
68e24113 | 1254 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1255 | |
813a224f AC |
1256 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1257 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1258 | MODULE_LICENSE("GPL"); |
1259 | ||
1da177e4 LT |
1260 | module_param(stats, bool, S_IRUGO | S_IWUSR); |
1261 | MODULE_PARM_DESC(stats, "Enable statistics or not"); | |
3cb4a4f7 LM |
1262 | module_param(interval, int, S_IRUGO | S_IWUSR); |
1263 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); | |
c312659c MF |
1264 | module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR); |
1265 | MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates"); |