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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * USB Cypress M8 driver
3 *
4 * Copyright (C) 2004
Alan Cox813a2242008-07-22 11:10:36 +01005 * Lonnie Mendez (dignome@gmail.com)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * 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 *
Alan Cox813a2242008-07-22 11:10:36 +010014 * See Documentation/usb/usb-serial.txt for more information on using this
15 * driver
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 *
17 * See http://geocities.com/i0xox0i for information on this driver and the
18 * earthmate usb device.
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 */
20
Alan Cox813a2242008-07-22 11:10:36 +010021/* Thanks to Neil Whelchel for writing the first cypress m8 implementation
22 for linux. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070023/* Thanks to cypress for providing references for the hid reports. */
24/* Thanks to Jiang Zhang for providing links and for general help. */
Alan Cox813a2242008-07-22 11:10:36 +010025/* Code originates and was built up from ftdi_sio, belkin, pl2303 and others.*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/kernel.h>
29#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#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>
Greg Kroah-Hartmana9698882006-07-11 21:22:58 -070038#include <linux/usb/serial.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/serial.h>
Johan Hovold117fb8d2010-05-16 20:33:50 +020040#include <linux/kfifo.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/delay.h>
Alan Cox813a2242008-07-22 11:10:36 +010042#include <linux/uaccess.h>
Johan Hovold0f2c2d72009-12-31 16:48:01 +010043#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include "cypress_m8.h"
46
47
Rusty Russell90ab5ee2012-01-13 09:32:20 +103048static bool stats;
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -050049static int interval;
Rusty Russell90ab5ee2012-01-13 09:32:20 +103050static bool unstable_bauds;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Németh Márton7d40d7e2010-01-10 15:34:24 +010058static const struct usb_device_id id_table_earthmate[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) },
Lonnie Mendez25b6f082005-05-10 17:09:52 -050060 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 { } /* Terminating entry */
62};
63
Németh Márton7d40d7e2010-01-10 15:34:24 +010064static const struct usb_device_id id_table_cyphidcomrs232[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },
Dmitry Shapin6f6f06e2008-03-04 15:25:10 -080066 { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) },
Robert Butora65295912013-05-31 18:09:51 +030067 { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) },
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 { } /* Terminating entry */
69};
70
Németh Márton7d40d7e2010-01-10 15:34:24 +010071static const struct usb_device_id id_table_nokiaca42v2[] = {
Lonnie Mendeza5c44e22006-03-01 10:45:24 -060072 { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },
73 { } /* Terminating entry */
74};
75
Németh Márton7d40d7e2010-01-10 15:34:24 +010076static const struct usb_device_id id_table_combined[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) },
Lonnie Mendez25b6f082005-05-10 17:09:52 -050078 { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },
Dmitry Shapin6f6f06e2008-03-04 15:25:10 -080080 { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) },
Robert Butora65295912013-05-31 18:09:51 +030081 { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) },
Lonnie Mendeza5c44e22006-03-01 10:45:24 -060082 { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 { } /* Terminating entry */
84};
85
Alan Cox813a2242008-07-22 11:10:36 +010086MODULE_DEVICE_TABLE(usb, id_table_combined);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
Mike Isely3416eaa2008-02-10 20:23:19 -060088enum 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070093struct 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 */
Johan Hovold117fb8d2010-05-16 20:33:50 +0200100 struct kfifo write_fifo; /* write fifo */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 int write_urb_in_use; /* write urb in use indicator */
Mike Isely0257fa92006-08-29 22:06:59 -0500102 int write_urb_interval; /* interval to use for write urb */
103 int read_urb_interval; /* interval to use for read urb */
Mike Isely78aef512006-08-29 22:07:11 -0500104 int comm_is_ok; /* true if communication is (still) ok */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 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 */
Mike Isely3416eaa2008-02-10 20:23:19 -0600110 enum packet_format pkt_fmt; /* format to use for packet send / receive */
Mike Isely3d6aa322008-02-10 20:23:24 -0600111 int get_cfg_unsafe; /* If true, the CYPRESS_GET_CONFIG is unsafe */
Alan Cox813a2242008-07-22 11:10:36 +0100112 int baud_rate; /* stores current baud rate in
113 integer form */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 int isthrottled; /* if throttled, discard reads */
Johan Hovoldab62a582014-01-02 22:49:27 +0100115 char prev_status; /* used for TIOCMIWAIT */
Daniel Mack3ad2f3f2010-02-03 08:01:28 +0800116 /* we pass a pointer to this as the argument sent to
Alan Cox813a2242008-07-22 11:10:36 +0100117 cypress_set_termios old_termios */
Alan Cox606d0992006-12-08 02:38:45 -0800118 struct ktermios tmp_termios; /* stores the old termios settings */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119};
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121/* function prototypes for the Cypress USB to serial device */
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200122static int cypress_earthmate_port_probe(struct usb_serial_port *port);
123static int cypress_hidcom_port_probe(struct usb_serial_port *port);
124static int cypress_ca42v2_port_probe(struct usb_serial_port *port);
125static int cypress_port_remove(struct usb_serial_port *port);
Alan Coxa509a7e2009-09-19 13:13:26 -0700126static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port);
Alan Cox335f8512009-06-11 12:26:29 +0100127static void cypress_close(struct usb_serial_port *port);
128static void cypress_dtr_rts(struct usb_serial_port *port, int on);
Alan Cox813a2242008-07-22 11:10:36 +0100129static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
130 const unsigned char *buf, int count);
131static void cypress_send(struct usb_serial_port *port);
132static int cypress_write_room(struct tty_struct *tty);
Alan Cox813a2242008-07-22 11:10:36 +0100133static void cypress_set_termios(struct tty_struct *tty,
134 struct usb_serial_port *port, struct ktermios *old);
Alan Cox60b33c12011-02-14 16:26:14 +0000135static int cypress_tiocmget(struct tty_struct *tty);
Alan Cox20b9d172011-02-14 16:26:50 +0000136static int cypress_tiocmset(struct tty_struct *tty,
Alan Cox813a2242008-07-22 11:10:36 +0100137 unsigned int set, unsigned int clear);
138static int cypress_chars_in_buffer(struct tty_struct *tty);
139static void cypress_throttle(struct tty_struct *tty);
140static void cypress_unthrottle(struct tty_struct *tty);
141static void cypress_set_dead(struct usb_serial_port *port);
142static void cypress_read_int_callback(struct urb *urb);
143static void cypress_write_int_callback(struct urb *urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
Greg Kroah-Hartmanea653702005-06-20 21:15:16 -0700145static struct usb_serial_driver cypress_earthmate_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700146 .driver = {
147 .owner = THIS_MODULE,
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700148 .name = "earthmate",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700149 },
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700150 .description = "DeLorme Earthmate USB",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 .id_table = id_table_earthmate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 .num_ports = 1,
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200153 .port_probe = cypress_earthmate_port_probe,
154 .port_remove = cypress_port_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 .open = cypress_open,
156 .close = cypress_close,
Alan Cox335f8512009-06-11 12:26:29 +0100157 .dtr_rts = cypress_dtr_rts,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 .write = cypress_write,
159 .write_room = cypress_write_room,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 .set_termios = cypress_set_termios,
161 .tiocmget = cypress_tiocmget,
162 .tiocmset = cypress_tiocmset,
Johan Hovoldab62a582014-01-02 22:49:27 +0100163 .tiocmiwait = usb_serial_generic_tiocmiwait,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 .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
Greg Kroah-Hartmanea653702005-06-20 21:15:16 -0700171static struct usb_serial_driver cypress_hidcom_device = {
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700172 .driver = {
173 .owner = THIS_MODULE,
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700174 .name = "cyphidcom",
Greg Kroah-Hartman18fcac32005-06-20 21:15:16 -0700175 },
Greg Kroah-Hartman269bda12005-06-20 21:15:16 -0700176 .description = "HID->COM RS232 Adapter",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 .id_table = id_table_cyphidcomrs232,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 .num_ports = 1,
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200179 .port_probe = cypress_hidcom_port_probe,
180 .port_remove = cypress_port_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 .open = cypress_open,
182 .close = cypress_close,
Alan Cox335f8512009-06-11 12:26:29 +0100183 .dtr_rts = cypress_dtr_rts,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 .write = cypress_write,
185 .write_room = cypress_write_room,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 .set_termios = cypress_set_termios,
187 .tiocmget = cypress_tiocmget,
188 .tiocmset = cypress_tiocmset,
Johan Hovoldab62a582014-01-02 22:49:27 +0100189 .tiocmiwait = usb_serial_generic_tiocmiwait,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 .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
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600197static struct usb_serial_driver cypress_ca42v2_device = {
198 .driver = {
199 .owner = THIS_MODULE,
Alan Cox813a2242008-07-22 11:10:36 +0100200 .name = "nokiaca42v2",
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600201 },
202 .description = "Nokia CA-42 V2 Adapter",
203 .id_table = id_table_nokiaca42v2,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600204 .num_ports = 1,
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200205 .port_probe = cypress_ca42v2_port_probe,
206 .port_remove = cypress_port_remove,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600207 .open = cypress_open,
208 .close = cypress_close,
Alan Cox335f8512009-06-11 12:26:29 +0100209 .dtr_rts = cypress_dtr_rts,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600210 .write = cypress_write,
211 .write_room = cypress_write_room,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600212 .set_termios = cypress_set_termios,
213 .tiocmget = cypress_tiocmget,
214 .tiocmset = cypress_tiocmset,
Johan Hovoldab62a582014-01-02 22:49:27 +0100215 .tiocmiwait = usb_serial_generic_tiocmiwait,
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600216 .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};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Alan Stern08a4f6b2012-02-23 14:56:17 -0500223static struct usb_serial_driver * const serial_drivers[] = {
224 &cypress_earthmate_device, &cypress_hidcom_device,
225 &cypress_ca42v2_device, NULL
226};
227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228/*****************************************************************************
229 * Cypress serial helper functions
230 *****************************************************************************/
231
Robert Butora65295912013-05-31 18:09:51 +0300232/* FRWD Dongle hidcom needs to skip reset and speed checks */
233static 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Alan Cox8873aaa2008-03-10 21:59:28 +0000239static int analyze_baud_rate(struct usb_serial_port *port, speed_t new_rate)
Mike Isely92983c22008-02-10 20:23:32 -0600240{
Mike Isely92983c22008-02-10 20:23:32 -0600241 struct cypress_private *priv;
242 priv = usb_get_serial_port_data(port);
243
Mike Frysingerc3126592009-12-18 16:33:03 -0500244 if (unstable_bauds)
245 return new_rate;
246
Robert Butora65295912013-05-31 18:09:51 +0300247 /* FRWD Dongle uses 115200 bps */
248 if (is_frwd(port->serial->dev))
249 return new_rate;
250
Mike Isely92983c22008-02-10 20:23:32 -0600251 /*
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 */
Mike Isely92983c22008-02-10 20:23:32 -0600260 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) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700269 dev_dbg(&port->dev,
270 "%s - failed setting baud rate, device incapable speed %d\n",
271 __func__, new_rate);
Mike Isely92983c22008-02-10 20:23:32 -0600272 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 */
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700281 dev_dbg(&port->dev,
Johan Hovoldd9a38a82014-03-12 19:09:42 +0100282 "%s - failed setting baud rate, unsupported speed of %d on Earthmate GPS\n",
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700283 __func__, new_rate);
Mike Isely92983c22008-02-10 20:23:32 -0600284 return -1;
285 }
286 break;
287 default:
288 break;
289 }
290 return new_rate;
291}
292
293
Steven Cole093cf722005-05-03 19:07:24 -0600294/* This function can either set or retrieve the current serial line settings */
Alan Cox813a2242008-07-22 11:10:36 +0100295static int cypress_serial_control(struct tty_struct *tty,
Alan Cox95da3102008-07-22 11:09:07 +0100296 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)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500300 int new_baudrate = 0, retval = 0, tries = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 struct cypress_private *priv;
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700302 struct device *dev = &port->dev;
Johan Hovold09546442009-12-28 23:01:48 +0100303 u8 *feature_buffer;
304 const unsigned int feature_len = 5;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 unsigned long flags;
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 priv = usb_get_serial_port_data(port);
308
Mike Isely78aef512006-08-29 22:07:11 -0500309 if (!priv->comm_is_ok)
310 return -ENODEV;
311
Johan Hovold09546442009-12-28 23:01:48 +0100312 feature_buffer = kcalloc(feature_len, sizeof(u8), GFP_KERNEL);
313 if (!feature_buffer)
314 return -ENOMEM;
315
Alan Cox813a2242008-07-22 11:10:36 +0100316 switch (cypress_request_type) {
317 case CYPRESS_SET_CONFIG:
Alan Cox813a2242008-07-22 11:10:36 +0100318 /* 0 means 'Hang up' so doesn't change the true bit rate */
Mike Frysinger2805eb12009-12-18 16:33:02 -0500319 new_baudrate = priv->baud_rate;
320 if (baud_rate && baud_rate != priv->baud_rate) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700321 dev_dbg(dev, "%s - baud rate is changing\n", __func__);
Alan Cox813a2242008-07-22 11:10:36 +0100322 retval = analyze_baud_rate(port, baud_rate);
Mike Frysinger2805eb12009-12-18 16:33:02 -0500323 if (retval >= 0) {
Alan Cox813a2242008-07-22 11:10:36 +0100324 new_baudrate = retval;
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700325 dev_dbg(dev, "%s - New baud rate set to %d\n",
326 __func__, new_baudrate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 }
Alan Cox813a2242008-07-22 11:10:36 +0100328 }
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700329 dev_dbg(dev, "%s - baud rate is being sent as %d\n", __func__,
330 new_baudrate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Alan Cox813a2242008-07-22 11:10:36 +0100332 /* fill the feature_buffer with new configuration */
Johan Hovold0f2c2d72009-12-31 16:48:01 +0100333 put_unaligned_le32(new_baudrate, feature_buffer);
Alan Cox813a2242008-07-22 11:10:36 +0100334 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700342 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__,
Alan Cox813a2242008-07-22 11:10:36 +0100344 feature_buffer[0], feature_buffer[1],
345 feature_buffer[2], feature_buffer[3],
346 feature_buffer[4]);
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500347
Alan Cox813a2242008-07-22 11:10:36 +0100348 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,
Johan Hovold09546442009-12-28 23:01:48 +0100354 feature_len, 500);
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500355
Alan Cox813a2242008-07-22 11:10:36 +0100356 if (tries++ >= 3)
357 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Johan Hovold09546442009-12-28 23:01:48 +0100359 } while (retval != feature_len &&
Alan Cox813a2242008-07-22 11:10:36 +0100360 retval != -ENODEV);
Mike Isely93075542008-02-10 20:23:14 -0600361
Johan Hovold09546442009-12-28 23:01:48 +0100362 if (retval != feature_len) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700363 dev_err(dev, "%s - failed sending serial line settings - %d\n",
364 __func__, retval);
Alan Cox813a2242008-07-22 11:10:36 +0100365 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. */
Johan Hovold09546442009-12-28 23:01:48 +0100382 retval = -ENOTTY;
383 goto out;
Alan Cox813a2242008-07-22 11:10:36 +0100384 }
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700385 dev_dbg(dev, "%s - retreiving serial line settings\n", __func__);
Alan Cox813a2242008-07-22 11:10:36 +0100386 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,
Johan Hovold09546442009-12-28 23:01:48 +0100392 feature_len, 500);
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500393
Alan Cox813a2242008-07-22 11:10:36 +0100394 if (tries++ >= 3)
395 break;
Johan Hovold09546442009-12-28 23:01:48 +0100396 } while (retval != feature_len
Alan Cox813a2242008-07-22 11:10:36 +0100397 && retval != -ENODEV);
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500398
Johan Hovold09546442009-12-28 23:01:48 +0100399 if (retval != feature_len) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700400 dev_err(dev, "%s - failed to retrieve serial line settings - %d\n",
401 __func__, retval);
Alan Cox813a2242008-07-22 11:10:36 +0100402 cypress_set_dead(port);
Johan Hovold09546442009-12-28 23:01:48 +0100403 goto out;
Alan Cox813a2242008-07-22 11:10:36 +0100404 } 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];
Johan Hovold0f2c2d72009-12-31 16:48:01 +0100409 priv->baud_rate = get_unaligned_le32(feature_buffer);
Alan Cox813a2242008-07-22 11:10:36 +0100410 spin_unlock_irqrestore(&priv->lock, flags);
411 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 }
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500413 spin_lock_irqsave(&priv->lock, flags);
414 ++priv->cmd_count;
415 spin_unlock_irqrestore(&priv->lock, flags);
Johan Hovold09546442009-12-28 23:01:48 +0100416out:
417 kfree(feature_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 return retval;
419} /* cypress_serial_control */
420
421
Mike Isely78aef512006-08-29 22:07:11 -0500422static 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
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700435 dev_err(&port->dev, "cypress_m8 suspending failing port %d - "
Greg Kroah-Hartman11438322013-06-06 10:32:00 -0700436 "interval might be too short\n", port->port_number);
Mike Isely78aef512006-08-29 22:07:11 -0500437}
438
439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440/*****************************************************************************
441 * Cypress serial driver functions
442 *****************************************************************************/
443
444
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200445static int cypress_generic_port_probe(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446{
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200447 struct usb_serial *serial = port->serial;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 struct cypress_private *priv;
449
Alan Cox813a2242008-07-22 11:10:36 +0100450 priv = kzalloc(sizeof(struct cypress_private), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 if (!priv)
452 return -ENOMEM;
453
Mike Isely78aef512006-08-29 22:07:11 -0500454 priv->comm_is_ok = !0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 spin_lock_init(&priv->lock);
Johan Hovold117fb8d2010-05-16 20:33:50 +0200456 if (kfifo_alloc(&priv->write_fifo, CYPRESS_BUF_SIZE, GFP_KERNEL)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 kfree(priv);
458 return -ENOMEM;
459 }
Alan Cox813a2242008-07-22 11:10:36 +0100460
Robert Butora65295912013-05-31 18:09:51 +0300461 /* Skip reset for FRWD device. It is a workaound:
462 device hangs if it receives SET_CONFIGURE in Configured
463 state. */
464 if (!is_frwd(serial->dev))
465 usb_reset_configuration(serial->dev);
Alan Cox813a2242008-07-22 11:10:36 +0100466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 priv->cmd_ctrl = 0;
468 priv->line_control = 0;
469 priv->termios_initialized = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 priv->rx_flags = 0;
Mike Isely3416eaa2008-02-10 20:23:19 -0600471 /* Default packet format setting is determined by packet size.
472 Anything with a size larger then 9 must have a separate
473 count field since the 3 bit count field is otherwise too
474 small. Otherwise we can use the slightly more compact
475 format. This is in accordance with the cypress_m8 serial
476 converter app note. */
Alan Cox813a2242008-07-22 11:10:36 +0100477 if (port->interrupt_out_size > 9)
Mike Isely3416eaa2008-02-10 20:23:19 -0600478 priv->pkt_fmt = packet_format_1;
Alan Cox813a2242008-07-22 11:10:36 +0100479 else
Mike Isely3416eaa2008-02-10 20:23:19 -0600480 priv->pkt_fmt = packet_format_2;
Alan Cox813a2242008-07-22 11:10:36 +0100481
Mike Isely0257fa92006-08-29 22:06:59 -0500482 if (interval > 0) {
483 priv->write_urb_interval = interval;
484 priv->read_urb_interval = interval;
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700485 dev_dbg(&port->dev, "%s - read & write intervals forced to %d\n",
486 __func__, interval);
Mike Isely0257fa92006-08-29 22:06:59 -0500487 } else {
488 priv->write_urb_interval = port->interrupt_out_urb->interval;
489 priv->read_urb_interval = port->interrupt_in_urb->interval;
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700490 dev_dbg(&port->dev, "%s - intervals: read=%d write=%d\n",
491 __func__, priv->read_urb_interval,
492 priv->write_urb_interval);
Mike Isely0257fa92006-08-29 22:06:59 -0500493 }
494 usb_set_serial_port_data(port, priv);
Alan Cox813a2242008-07-22 11:10:36 +0100495
Johan Hovoldd7be6222013-06-26 16:47:23 +0200496 port->port.drain_delay = 256;
497
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500498 return 0;
499}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
501
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200502static int cypress_earthmate_port_probe(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503{
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200504 struct usb_serial *serial = port->serial;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 struct cypress_private *priv;
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200506 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200508 ret = cypress_generic_port_probe(port);
509 if (ret) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700510 dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__);
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200511 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 }
513
Mike Isely3d6aa322008-02-10 20:23:24 -0600514 priv = usb_get_serial_port_data(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 priv->chiptype = CT_EARTHMATE;
Mike Isely3416eaa2008-02-10 20:23:19 -0600516 /* All Earthmate devices use the separated-count packet
517 format! Idiotic. */
518 priv->pkt_fmt = packet_format_1;
Alan Cox813a2242008-07-22 11:10:36 +0100519 if (serial->dev->descriptor.idProduct !=
520 cpu_to_le16(PRODUCT_ID_EARTHMATEUSB)) {
Mike Isely3d6aa322008-02-10 20:23:24 -0600521 /* 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 :-( */
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700525 dev_dbg(&port->dev,
526 "%s - Marking this device as unsafe for GET_CONFIG commands\n",
527 __func__);
Mike Isely3d6aa322008-02-10 20:23:24 -0600528 priv->get_cfg_unsafe = !0;
529 }
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500530
531 return 0;
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200532}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200534static int cypress_hidcom_port_probe(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535{
536 struct cypress_private *priv;
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200537 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200539 ret = cypress_generic_port_probe(port);
540 if (ret) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700541 dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__);
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200542 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 }
544
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700545 priv = usb_get_serial_port_data(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 priv->chiptype = CT_CYPHIDCOM;
Alan Cox813a2242008-07-22 11:10:36 +0100547
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500548 return 0;
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200549}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200551static int cypress_ca42v2_port_probe(struct usb_serial_port *port)
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600552{
553 struct cypress_private *priv;
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200554 int ret;
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600555
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200556 ret = cypress_generic_port_probe(port);
557 if (ret) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700558 dev_dbg(&port->dev, "%s - Failed setting up port\n", __func__);
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200559 return ret;
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600560 }
561
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700562 priv = usb_get_serial_port_data(port);
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600563 priv->chiptype = CT_CA42V2;
564
565 return 0;
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200566}
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600567
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200568static int cypress_port_remove(struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569{
570 struct cypress_private *priv;
571
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200572 priv = usb_get_serial_port_data(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Johan Hovold5c1a0f42012-10-17 13:34:55 +0200574 kfifo_free(&priv->write_fifo);
575 kfree(priv);
576
577 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578}
579
Alan Coxa509a7e2009-09-19 13:13:26 -0700580static int cypress_open(struct tty_struct *tty, struct usb_serial_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581{
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
Mike Isely78aef512006-08-29 22:07:11 -0500587 if (!priv->comm_is_ok)
588 return -EIO;
589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 /* clear halts before open */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 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
Alan Cox335f8512009-06-11 12:26:29 +0100602 /* Set termios */
Alan Coxfe1ae7f2009-09-19 13:13:33 -0700603 cypress_send(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
Alan Cox95da3102008-07-22 11:09:07 +0100605 if (tty)
606 cypress_set_termios(tty, port, &priv->tmp_termios);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608 /* setup the port and start reading from the device */
Alan Cox813a2242008-07-22 11:10:36 +0100609 if (!port->interrupt_in_urb) {
Greg Kroah-Hartman194343d2008-08-20 16:56:34 -0700610 dev_err(&port->dev, "%s - interrupt_in_urb is empty!\n",
611 __func__);
Alan Cox813a2242008-07-22 11:10:36 +0100612 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 }
614
615 usb_fill_int_urb(port->interrupt_in_urb, serial->dev,
616 usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress),
Alan Cox813a2242008-07-22 11:10:36 +0100617 port->interrupt_in_urb->transfer_buffer,
618 port->interrupt_in_urb->transfer_buffer_length,
Mike Isely0257fa92006-08-29 22:06:59 -0500619 cypress_read_int_callback, port, priv->read_urb_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
621
Alan Cox813a2242008-07-22 11:10:36 +0100622 if (result) {
623 dev_err(&port->dev,
624 "%s - failed submitting read urb, error %d\n",
625 __func__, result);
Mike Isely78aef512006-08-29 22:07:11 -0500626 cypress_set_dead(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 }
Johan Hovoldd7be6222013-06-26 16:47:23 +0200628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 return result;
630} /* cypress_open */
631
Alan Cox335f8512009-06-11 12:26:29 +0100632static void cypress_dtr_rts(struct usb_serial_port *port, int on)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633{
634 struct cypress_private *priv = usb_get_serial_port_data(port);
Alan Cox335f8512009-06-11 12:26:29 +0100635 /* drop dtr and rts */
Alan Cox335f8512009-06-11 12:26:29 +0100636 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}
645
646static void cypress_close(struct usb_serial_port *port)
647{
648 struct cypress_private *priv = usb_get_serial_port_data(port);
Johan Hovold117fb8d2010-05-16 20:33:50 +0200649 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
Johan Hovold117fb8d2010-05-16 20:33:50 +0200651 spin_lock_irqsave(&priv->lock, flags);
652 kfifo_reset_out(&priv->write_fifo);
653 spin_unlock_irqrestore(&priv->lock, flags);
654
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700655 dev_dbg(&port->dev, "%s - stopping urbs\n", __func__);
Alan Cox813a2242008-07-22 11:10:36 +0100656 usb_kill_urb(port->interrupt_in_urb);
657 usb_kill_urb(port->interrupt_out_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 if (stats)
Alan Cox813a2242008-07-22 11:10:36 +0100660 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662} /* cypress_close */
663
664
Alan Cox95da3102008-07-22 11:09:07 +0100665static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
666 const unsigned char *buf, int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667{
668 struct cypress_private *priv = usb_get_serial_port_data(port);
Alan Cox813a2242008-07-22 11:10:36 +0100669
Greg Kroah-Hartman11438322013-06-06 10:32:00 -0700670 dev_dbg(&port->dev, "%s - %d bytes\n", __func__, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
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 }
Alan Cox813a2242008-07-22 11:10:36 +0100679
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 if (!count)
681 return count;
Alan Cox813a2242008-07-22 11:10:36 +0100682
Johan Hovold117fb8d2010-05-16 20:33:50 +0200683 count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
685finish:
686 cypress_send(port);
687
688 return count;
689} /* cypress_write */
690
691
692static 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);
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700696 struct device *dev = &port->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 unsigned long flags;
Alan Cox813a2242008-07-22 11:10:36 +0100698
Mike Isely78aef512006-08-29 22:07:11 -0500699 if (!priv->comm_is_ok)
700 return;
701
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700702 dev_dbg(dev, "%s - interrupt out size is %d\n", __func__,
703 port->interrupt_out_size);
Alan Cox813a2242008-07-22 11:10:36 +0100704
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 spin_lock_irqsave(&priv->lock, flags);
706 if (priv->write_urb_in_use) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700707 dev_dbg(dev, "%s - can't write, urb in use\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 spin_unlock_irqrestore(&priv->lock, flags);
709 return;
710 }
711 spin_unlock_irqrestore(&priv->lock, flags);
712
713 /* clear buffer */
Alan Cox813a2242008-07-22 11:10:36 +0100714 memset(port->interrupt_out_urb->transfer_buffer, 0,
715 port->interrupt_out_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
717 spin_lock_irqsave(&priv->lock, flags);
Mike Isely3416eaa2008-02-10 20:23:19 -0600718 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 }
731
732 if (priv->line_control & CONTROL_RESET)
733 priv->line_control &= ~CONTROL_RESET;
734
735 if (priv->cmd_ctrl) {
736 priv->cmd_count++;
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700737 dev_dbg(dev, "%s - line control command being issued\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 spin_unlock_irqrestore(&priv->lock, flags);
739 goto send;
740 } else
741 spin_unlock_irqrestore(&priv->lock, flags);
742
Johan Hovold117fb8d2010-05-16 20:33:50 +0200743 count = kfifo_out_locked(&priv->write_fifo,
744 &port->interrupt_out_buffer[offset],
745 port->interrupt_out_size - offset,
746 &priv->lock);
Alan Cox813a2242008-07-22 11:10:36 +0100747 if (count == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
Mike Isely3416eaa2008-02-10 20:23:19 -0600750 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 }
758
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700759 dev_dbg(dev, "%s - count is %d\n", __func__, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
761send:
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
Mike Isely3416eaa2008-02-10 20:23:19 -0600769 actual_size = count +
770 (priv->pkt_fmt == packet_format_1 ? 2 : 1);
771
Greg Kroah-Hartman59d33f22012-09-18 09:58:57 +0100772 usb_serial_debug_data(dev, __func__, port->interrupt_out_size,
773 port->interrupt_out_urb->transfer_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
Mike Isely9aa8dae2006-08-29 22:07:04 -0500775 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);
Alan Cox813a2242008-07-22 11:10:36 +0100779 result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 if (result) {
Johan Hovold22a416c2012-02-10 13:20:51 +0100781 dev_err_console(port,
Alan Cox813a2242008-07-22 11:10:36 +0100782 "%s - failed submitting write urb, error %d\n",
783 __func__, result);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 priv->write_urb_in_use = 0;
Mike Isely78aef512006-08-29 22:07:11 -0500785 cypress_set_dead(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 }
787
788 spin_lock_irqsave(&priv->lock, flags);
Alan Cox813a2242008-07-22 11:10:36 +0100789 if (priv->cmd_ctrl)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 priv->cmd_ctrl = 0;
Alan Cox813a2242008-07-22 11:10:36 +0100791
792 /* do not count the line control and size bytes */
793 priv->bytes_out += count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 spin_unlock_irqrestore(&priv->lock, flags);
795
Pete Zaitcevcf2c7482006-05-22 21:58:49 -0700796 usb_serial_port_softint(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797} /* cypress_send */
798
799
800/* returns how much space is available in the soft buffer */
Alan Cox95da3102008-07-22 11:09:07 +0100801static int cypress_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802{
Alan Cox95da3102008-07-22 11:09:07 +0100803 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 struct cypress_private *priv = usb_get_serial_port_data(port);
805 int room = 0;
806 unsigned long flags;
807
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 spin_lock_irqsave(&priv->lock, flags);
Johan Hovold117fb8d2010-05-16 20:33:50 +0200809 room = kfifo_avail(&priv->write_fifo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 spin_unlock_irqrestore(&priv->lock, flags);
811
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700812 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 return room;
814}
815
816
Alan Cox60b33c12011-02-14 16:26:14 +0000817static int cypress_tiocmget(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818{
Alan Cox95da3102008-07-22 11:09:07 +0100819 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 struct cypress_private *priv = usb_get_serial_port_data(port);
821 __u8 status, control;
822 unsigned int result = 0;
823 unsigned long flags;
Alan Cox813a2242008-07-22 11:10:36 +0100824
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 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
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700837 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839 return result;
840}
841
842
Alan Cox20b9d172011-02-14 16:26:50 +0000843static int cypress_tiocmset(struct tty_struct *tty,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 unsigned int set, unsigned int clear)
845{
Alan Cox95da3102008-07-22 11:09:07 +0100846 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 struct cypress_private *priv = usb_get_serial_port_data(port);
848 unsigned long flags;
Alan Cox813a2242008-07-22 11:10:36 +0100849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 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;
Alan Cox8873aaa2008-03-10 21:59:28 +0000859 priv->cmd_ctrl = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 spin_unlock_irqrestore(&priv->lock, flags);
861
Alan Cox95da3102008-07-22 11:09:07 +0100862 return cypress_write(tty, port, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863}
864
Alan Cox95da3102008-07-22 11:09:07 +0100865static void cypress_set_termios(struct tty_struct *tty,
866 struct usb_serial_port *port, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867{
868 struct cypress_private *priv = usb_get_serial_port_data(port);
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700869 struct device *dev = &port->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 int data_bits, stop_bits, parity_type, parity_enable;
Alan Cox8873aaa2008-03-10 21:59:28 +0000871 unsigned cflag, iflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 unsigned long flags;
873 __u8 oldlines;
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500874 int linechange = 0;
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500875
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 spin_lock_irqsave(&priv->lock, flags);
Alan Coxfe1ae7f2009-09-19 13:13:33 -0700877 /* We can't clean this one up as we don't know the device type
878 early enough */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 if (!priv->termios_initialized) {
880 if (priv->chiptype == CT_EARTHMATE) {
Alan Coxadc8d742012-07-14 15:31:47 +0100881 tty->termios = tty_std_termios;
882 tty->termios.c_cflag = B4800 | CS8 | CREAD | HUPCL |
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500883 CLOCAL;
Alan Coxadc8d742012-07-14 15:31:47 +0100884 tty->termios.c_ispeed = 4800;
885 tty->termios.c_ospeed = 4800;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 } else if (priv->chiptype == CT_CYPHIDCOM) {
Alan Coxadc8d742012-07-14 15:31:47 +0100887 tty->termios = tty_std_termios;
888 tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500889 CLOCAL;
Alan Coxadc8d742012-07-14 15:31:47 +0100890 tty->termios.c_ispeed = 9600;
891 tty->termios.c_ospeed = 9600;
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600892 } else if (priv->chiptype == CT_CA42V2) {
Alan Coxadc8d742012-07-14 15:31:47 +0100893 tty->termios = tty_std_termios;
894 tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
Lonnie Mendeza5c44e22006-03-01 10:45:24 -0600895 CLOCAL;
Alan Coxadc8d742012-07-14 15:31:47 +0100896 tty->termios.c_ispeed = 9600;
897 tty->termios.c_ospeed = 9600;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 }
899 priv->termios_initialized = 1;
900 }
901 spin_unlock_irqrestore(&priv->lock, flags);
902
Alan Cox8873aaa2008-03-10 21:59:28 +0000903 /* Unsupported features need clearing */
Alan Coxadc8d742012-07-14 15:31:47 +0100904 tty->termios.c_cflag &= ~(CMSPAR|CRTSCTS);
Alan Cox8873aaa2008-03-10 21:59:28 +0000905
Alan Coxadc8d742012-07-14 15:31:47 +0100906 cflag = tty->termios.c_cflag;
907 iflag = tty->termios.c_iflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
909 /* check if there are new settings */
910 if (old_termios) {
Alan Cox8873aaa2008-03-10 21:59:28 +0000911 spin_lock_irqsave(&priv->lock, flags);
Alan Coxadc8d742012-07-14 15:31:47 +0100912 priv->tmp_termios = tty->termios;
Alan Cox8873aaa2008-03-10 21:59:28 +0000913 spin_unlock_irqrestore(&priv->lock, flags);
914 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
916 /* set number of data bits, parity, stop bits */
917 /* when parity is disabled the parity type bit is ignored */
918
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500919 /* 1 means 2 stop bits, 0 means 1 stop bit */
920 stop_bits = cflag & CSTOPB ? 1 : 0;
921
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 if (cflag & PARENB) {
923 parity_enable = 1;
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500924 /* 1 means odd parity, 0 means even parity */
925 parity_type = cflag & PARODD ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 } else
927 parity_enable = parity_type = 0;
928
Alan Cox77336822008-07-22 11:10:53 +0100929 switch (cflag & CSIZE) {
930 case CS5:
931 data_bits = 0;
932 break;
933 case CS6:
934 data_bits = 1;
935 break;
936 case CS7:
937 data_bits = 2;
938 break;
939 case CS8:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 data_bits = 3;
Alan Cox77336822008-07-22 11:10:53 +0100941 break;
942 default:
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700943 dev_err(dev, "%s - CSIZE was set, but not CS5-CS8\n", __func__);
Alan Cox77336822008-07-22 11:10:53 +0100944 data_bits = 3;
945 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 spin_lock_irqsave(&priv->lock, flags);
947 oldlines = priv->line_control;
948 if ((cflag & CBAUD) == B0) {
949 /* drop dtr and rts */
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700950 dev_dbg(dev, "%s - dropping the lines, baud rate 0bps\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
Alan Cox8873aaa2008-03-10 21:59:28 +0000952 } else
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500953 priv->line_control = (CONTROL_DTR | CONTROL_RTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700956 dev_dbg(dev, "%s - sending %d stop_bits, %d parity_enable, %d parity_type, %d data_bits (+5)\n",
957 __func__, stop_bits, parity_enable, parity_type, data_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
Alan Cox813a2242008-07-22 11:10:36 +0100959 cypress_serial_control(tty, port, tty_get_baud_rate(tty),
960 data_bits, stop_bits,
961 parity_enable, parity_type,
962 0, CYPRESS_SET_CONFIG);
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500963
964 /* we perform a CYPRESS_GET_CONFIG so that the current settings are
965 * filled into the private structure this should confirm that all is
966 * working if it returns what we just set */
Alan Cox95da3102008-07-22 11:09:07 +0100967 cypress_serial_control(tty, port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500969 /* Here we can define custom tty settings for devices; the main tty
970 * termios flag base comes from empeg.c */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500972 spin_lock_irqsave(&priv->lock, flags);
Alan Cox813a2242008-07-22 11:10:36 +0100973 if (priv->chiptype == CT_EARTHMATE && priv->baud_rate == 4800) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -0700974 dev_dbg(dev, "Using custom termios settings for a baud rate of 4800bps.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 /* define custom termios settings for NMEA protocol */
976
Alan Coxadc8d742012-07-14 15:31:47 +0100977 tty->termios.c_iflag /* input modes - */
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500978 &= ~(IGNBRK /* disable ignore break */
979 | BRKINT /* disable break causes interrupt */
980 | PARMRK /* disable mark parity errors */
981 | ISTRIP /* disable clear high bit of input char */
982 | INLCR /* disable translate NL to CR */
983 | IGNCR /* disable ignore CR */
984 | ICRNL /* disable translate CR to NL */
985 | IXON); /* disable enable XON/XOFF flow control */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
Alan Coxadc8d742012-07-14 15:31:47 +0100987 tty->termios.c_oflag /* output modes */
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500988 &= ~OPOST; /* disable postprocess output char */
989
Alan Coxadc8d742012-07-14 15:31:47 +0100990 tty->termios.c_lflag /* line discipline modes */
Lonnie Mendezb9db07f2005-07-12 17:21:31 -0500991 &= ~(ECHO /* disable echo input characters */
992 | ECHONL /* disable echo new line */
993 | ICANON /* disable erase, kill, werase, and rprnt
994 special characters */
995 | ISIG /* disable interrupt, quit, and suspend
996 special characters */
997 | IEXTEN); /* disable non-POSIX special characters */
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -0500998 } /* CT_CYPHIDCOM: Application should handle this for device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 linechange = (priv->line_control != oldlines);
1001 spin_unlock_irqrestore(&priv->lock, flags);
1002
1003 /* if necessary, set lines */
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -05001004 if (linechange) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 priv->cmd_ctrl = 1;
Alan Cox95da3102008-07-22 11:09:07 +01001006 cypress_write(tty, port, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008} /* cypress_set_termios */
1009
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001010
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011/* returns amount of data still left in soft buffer */
Alan Cox95da3102008-07-22 11:09:07 +01001012static int cypress_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013{
Alan Cox95da3102008-07-22 11:09:07 +01001014 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 struct cypress_private *priv = usb_get_serial_port_data(port);
1016 int chars = 0;
1017 unsigned long flags;
1018
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 spin_lock_irqsave(&priv->lock, flags);
Johan Hovold117fb8d2010-05-16 20:33:50 +02001020 chars = kfifo_len(&priv->write_fifo);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 spin_unlock_irqrestore(&priv->lock, flags);
1022
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001023 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 return chars;
1025}
1026
1027
Alan Cox95da3102008-07-22 11:09:07 +01001028static void cypress_throttle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029{
Alan Cox95da3102008-07-22 11:09:07 +01001030 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 struct cypress_private *priv = usb_get_serial_port_data(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032
Oliver Neukum63832512009-10-07 10:50:23 +02001033 spin_lock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 priv->rx_flags = THROTTLED;
Oliver Neukum63832512009-10-07 10:50:23 +02001035 spin_unlock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036}
1037
1038
Alan Cox95da3102008-07-22 11:09:07 +01001039static void cypress_unthrottle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040{
Alan Cox95da3102008-07-22 11:09:07 +01001041 struct usb_serial_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 struct cypress_private *priv = usb_get_serial_port_data(port);
1043 int actually_throttled, result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044
Oliver Neukum63832512009-10-07 10:50:23 +02001045 spin_lock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
1047 priv->rx_flags = 0;
Oliver Neukum63832512009-10-07 10:50:23 +02001048 spin_unlock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
Mike Isely78aef512006-08-29 22:07:11 -05001050 if (!priv->comm_is_ok)
1051 return;
1052
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 if (actually_throttled) {
Oliver Neukum63832512009-10-07 10:50:23 +02001054 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
Mike Isely78aef512006-08-29 22:07:11 -05001055 if (result) {
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001056 dev_err(&port->dev, "%s - failed submitting read urb, "
Harvey Harrison441b62c2008-03-03 16:08:34 -08001057 "error %d\n", __func__, result);
Mike Isely78aef512006-08-29 22:07:11 -05001058 cypress_set_dead(port);
1059 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 }
1061}
1062
1063
David Howells7d12e782006-10-05 14:55:46 +01001064static void cypress_read_int_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065{
Ming Leicdc97792008-02-24 18:41:47 +08001066 struct usb_serial_port *port = urb->context;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 struct cypress_private *priv = usb_get_serial_port_data(port);
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001068 struct device *dev = &urb->dev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 struct tty_struct *tty;
1070 unsigned char *data = urb->transfer_buffer;
1071 unsigned long flags;
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001072 char tty_flag = TTY_NORMAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 int havedata = 0;
1074 int bytes = 0;
1075 int result;
1076 int i = 0;
Greg Kroah-Hartman8d7bc552007-06-15 15:44:13 -07001077 int status = urb->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078
Greg Kroah-Hartman8d7bc552007-06-15 15:44:13 -07001079 switch (status) {
Mike Isely78aef512006-08-29 22:07:11 -05001080 case 0: /* success */
1081 break;
1082 case -ECONNRESET:
1083 case -ENOENT:
1084 case -ESHUTDOWN:
1085 /* precursor to disconnect so just go away */
1086 return;
1087 case -EPIPE:
Alan Stern4d2fae82009-07-09 12:59:57 -04001088 /* Can't call usb_clear_halt while in_interrupt */
1089 /* FALLS THROUGH */
Mike Isely78aef512006-08-29 22:07:11 -05001090 default:
1091 /* something ugly is going on... */
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001092 dev_err(dev, "%s - unexpected nonzero read status received: %d\n",
1093 __func__, status);
Mike Isely78aef512006-08-29 22:07:11 -05001094 cypress_set_dead(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 return;
1096 }
1097
1098 spin_lock_irqsave(&priv->lock, flags);
1099 if (priv->rx_flags & THROTTLED) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001100 dev_dbg(dev, "%s - now throttling\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 priv->rx_flags |= ACTUALLY_THROTTLED;
1102 spin_unlock_irqrestore(&priv->lock, flags);
1103 return;
1104 }
1105 spin_unlock_irqrestore(&priv->lock, flags);
1106
Alan Cox4a90f092008-10-13 10:39:46 +01001107 tty = tty_port_tty_get(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 if (!tty) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001109 dev_dbg(dev, "%s - bad tty pointer - exiting\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 return;
1111 }
1112
1113 spin_lock_irqsave(&priv->lock, flags);
Mike Isely3416eaa2008-02-10 20:23:19 -06001114 result = urb->actual_length;
1115 switch (priv->pkt_fmt) {
1116 default:
1117 case packet_format_1:
1118 /* This is for the CY7C64013... */
1119 priv->current_status = data[0] & 0xF8;
1120 bytes = data[1] + 2;
1121 i = 2;
1122 if (bytes > 2)
1123 havedata = 1;
1124 break;
1125 case packet_format_2:
1126 /* This is for the CY7C63743... */
1127 priv->current_status = data[0] & 0xF8;
1128 bytes = (data[0] & 0x07) + 1;
1129 i = 1;
1130 if (bytes > 1)
1131 havedata = 1;
1132 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 }
1134 spin_unlock_irqrestore(&priv->lock, flags);
Mike Isely3416eaa2008-02-10 20:23:19 -06001135 if (result < bytes) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001136 dev_dbg(dev,
1137 "%s - wrong packet size - received %d bytes but packet said %d bytes\n",
1138 __func__, result, bytes);
Mike Isely3416eaa2008-02-10 20:23:19 -06001139 goto continue_read;
1140 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141
Greg Kroah-Hartman59d33f22012-09-18 09:58:57 +01001142 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143
1144 spin_lock_irqsave(&priv->lock, flags);
1145 /* check to see if status has changed */
Mike Isely67683062008-02-10 20:23:28 -06001146 if (priv->current_status != priv->prev_status) {
Johan Hovoldab62a582014-01-02 22:49:27 +01001147 u8 delta = priv->current_status ^ priv->prev_status;
Johan Hovold76033812014-01-02 22:49:26 +01001148
Johan Hovoldab62a582014-01-02 22:49:27 +01001149 if (delta & UART_MSR_MASK) {
1150 if (delta & UART_CTS)
1151 port->icount.cts++;
1152 if (delta & UART_DSR)
1153 port->icount.dsr++;
1154 if (delta & UART_RI)
1155 port->icount.rng++;
1156 if (delta & UART_CD)
1157 port->icount.dcd++;
1158
Johan Hovold76033812014-01-02 22:49:26 +01001159 wake_up_interruptible(&port->port.delta_msr_wait);
Johan Hovoldab62a582014-01-02 22:49:27 +01001160 }
Johan Hovold76033812014-01-02 22:49:26 +01001161
Mike Isely67683062008-02-10 20:23:28 -06001162 priv->prev_status = priv->current_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 }
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001164 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001166 /* hangup, as defined in acm.c... this might be a bad place for it
1167 * though */
Alan Coxadc8d742012-07-14 15:31:47 +01001168 if (tty && !(tty->termios.c_cflag & CLOCAL) &&
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001169 !(priv->current_status & UART_CD)) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001170 dev_dbg(dev, "%s - calling hangup\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 tty_hangup(tty);
1172 goto continue_read;
1173 }
1174
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001175 /* There is one error bit... I'm assuming it is a parity error
1176 * indicator as the generic firmware will set this bit to 1 if a
1177 * parity error occurs.
1178 * I can not find reference to any other error events. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 spin_lock_irqsave(&priv->lock, flags);
1180 if (priv->current_status & CYP_ERROR) {
1181 spin_unlock_irqrestore(&priv->lock, flags);
1182 tty_flag = TTY_PARITY;
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001183 dev_dbg(dev, "%s - Parity Error detected\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 } else
1185 spin_unlock_irqrestore(&priv->lock, flags);
1186
1187 /* process read if there is data other than line status */
Jiri Slaby2e124b42013-01-03 15:53:06 +01001188 if (bytes > i) {
Jiri Slaby2f693352013-01-03 15:53:02 +01001189 tty_insert_flip_string_fixed_flag(&port->port, data + i,
Johan Hovold70ced222010-05-07 19:46:56 +02001190 tty_flag, bytes - i);
Jiri Slaby2e124b42013-01-03 15:53:06 +01001191 tty_flip_buffer_push(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 }
1193
1194 spin_lock_irqsave(&priv->lock, flags);
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001195 /* control and status byte(s) are also counted */
1196 priv->bytes_in += bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 spin_unlock_irqrestore(&priv->lock, flags);
1198
1199continue_read:
Alan Cox4a90f092008-10-13 10:39:46 +01001200 tty_kref_put(tty);
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001201
Alan Stern1f871582010-02-17 10:05:47 -05001202 /* Continue trying to always read */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
Alan Stern1f871582010-02-17 10:05:47 -05001204 if (priv->comm_is_ok) {
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001205 usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev,
1206 usb_rcvintpipe(port->serial->dev,
1207 port->interrupt_in_endpointAddress),
1208 port->interrupt_in_urb->transfer_buffer,
1209 port->interrupt_in_urb->transfer_buffer_length,
Alan Cox813a2242008-07-22 11:10:36 +01001210 cypress_read_int_callback, port,
1211 priv->read_urb_interval);
Lonnie Mendezb9db07f2005-07-12 17:21:31 -05001212 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
Alan Stern1f871582010-02-17 10:05:47 -05001213 if (result && result != -EPERM) {
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001214 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
1215 __func__, result);
Mike Isely78aef512006-08-29 22:07:11 -05001216 cypress_set_dead(port);
1217 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219} /* cypress_read_int_callback */
1220
1221
David Howells7d12e782006-10-05 14:55:46 +01001222static void cypress_write_int_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223{
Ming Leicdc97792008-02-24 18:41:47 +08001224 struct usb_serial_port *port = urb->context;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 struct cypress_private *priv = usb_get_serial_port_data(port);
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001226 struct device *dev = &urb->dev->dev;
Greg Kroah-Hartman8d7bc552007-06-15 15:44:13 -07001227 int status = urb->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228
Greg Kroah-Hartman8d7bc552007-06-15 15:44:13 -07001229 switch (status) {
Alan Cox813a2242008-07-22 11:10:36 +01001230 case 0:
1231 /* success */
1232 break;
1233 case -ECONNRESET:
1234 case -ENOENT:
1235 case -ESHUTDOWN:
1236 /* this urb is terminated, clean up */
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001237 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
1238 __func__, status);
Alan Cox813a2242008-07-22 11:10:36 +01001239 priv->write_urb_in_use = 0;
1240 return;
Johan Hovoldd7c933a2014-03-12 19:09:37 +01001241 case -EPIPE:
1242 /* Cannot call usb_clear_halt while in_interrupt */
1243 /* FALLTHROUGH */
Alan Cox813a2242008-07-22 11:10:36 +01001244 default:
Greg Kroah-Hartmandfa1c312012-09-14 09:47:38 -07001245 dev_err(dev, "%s - unexpected nonzero write status received: %d\n",
1246 __func__, status);
Alan Cox813a2242008-07-22 11:10:36 +01001247 cypress_set_dead(port);
1248 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 priv->write_urb_in_use = 0;
Alan Cox813a2242008-07-22 11:10:36 +01001251
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 /* send any buffered data */
1253 cypress_send(port);
1254}
1255
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -07001256module_usb_serial_driver(serial_drivers, id_table_combined);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
Alan Cox813a2242008-07-22 11:10:36 +01001258MODULE_AUTHOR(DRIVER_AUTHOR);
1259MODULE_DESCRIPTION(DRIVER_DESC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260MODULE_LICENSE("GPL");
1261
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262module_param(stats, bool, S_IRUGO | S_IWUSR);
1263MODULE_PARM_DESC(stats, "Enable statistics or not");
Lonnie Mendez3cb4a4f2005-05-03 17:02:20 -05001264module_param(interval, int, S_IRUGO | S_IWUSR);
1265MODULE_PARM_DESC(interval, "Overrides interrupt interval");
Mike Frysingerc3126592009-12-18 16:33:03 -05001266module_param(unstable_bauds, bool, S_IRUGO | S_IWUSR);
1267MODULE_PARM_DESC(unstable_bauds, "Allow unstable baud rates");