Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * USB Cypress M8 driver |
| 3 | * |
| 4 | * Copyright (C) 2004 |
| 5 | * Lonnie Mendez (dignome@gmail.com) |
| 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 | * |
| 14 | * See Documentation/usb/usb-serial.txt for more information on using this driver |
| 15 | * |
| 16 | * See http://geocities.com/i0xox0i for information on this driver and the |
| 17 | * earthmate usb device. |
| 18 | * |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 19 | * Lonnie Mendez <dignome@gmail.com> |
| 20 | * 4-29-2005 |
| 21 | * Fixed problem where setting or retreiving the serial config would fail with |
| 22 | * EPIPE. Removed CRTS toggling so the driver behaves more like other usbserial |
| 23 | * adapters. Issued new interval of 1ms instead of the default 10ms. As a |
| 24 | * result, transfer speed has been substantially increased. From avg. 850bps to |
| 25 | * avg. 3300bps. initial termios has also been modified. Cleaned up code and |
| 26 | * formatting issues so it is more readable. Replaced the C++ style comments. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | * |
| 28 | * Lonnie Mendez <dignome@gmail.com> |
| 29 | * 12-15-2004 |
| 30 | * Incorporated write buffering from pl2303 driver. Fixed bug with line |
| 31 | * handling so both lines are raised in cypress_open. (was dropping rts) |
| 32 | * Various code cleanups made as well along with other misc bug fixes. |
| 33 | * |
| 34 | * Lonnie Mendez <dignome@gmail.com> |
| 35 | * 04-10-2004 |
| 36 | * Driver modified to support dynamic line settings. Various improvments |
| 37 | * and features. |
| 38 | * |
| 39 | * Neil Whelchel |
| 40 | * 10-2003 |
| 41 | * Driver first released. |
| 42 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | */ |
| 44 | |
| 45 | /* Thanks to Neil Whelchel for writing the first cypress m8 implementation for linux. */ |
| 46 | /* Thanks to cypress for providing references for the hid reports. */ |
| 47 | /* Thanks to Jiang Zhang for providing links and for general help. */ |
| 48 | /* Code originates and was built up from ftdi_sio, belkin, pl2303 and others. */ |
| 49 | |
| 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <linux/kernel.h> |
| 52 | #include <linux/errno.h> |
| 53 | #include <linux/init.h> |
| 54 | #include <linux/slab.h> |
| 55 | #include <linux/tty.h> |
| 56 | #include <linux/tty_driver.h> |
| 57 | #include <linux/tty_flip.h> |
| 58 | #include <linux/module.h> |
| 59 | #include <linux/moduleparam.h> |
| 60 | #include <linux/spinlock.h> |
| 61 | #include <linux/usb.h> |
Greg Kroah-Hartman | a969888 | 2006-07-11 21:22:58 -0700 | [diff] [blame^] | 62 | #include <linux/usb/serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #include <linux/serial.h> |
| 64 | #include <linux/delay.h> |
| 65 | #include <asm/uaccess.h> |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #include "cypress_m8.h" |
| 68 | |
| 69 | |
| 70 | #ifdef CONFIG_USB_SERIAL_DEBUG |
| 71 | static int debug = 1; |
| 72 | #else |
| 73 | static int debug; |
| 74 | #endif |
| 75 | static int stats; |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 76 | static int interval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | /* |
| 79 | * Version Information |
| 80 | */ |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 81 | #define DRIVER_VERSION "v1.09" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" |
| 83 | #define DRIVER_DESC "Cypress USB to Serial Driver" |
| 84 | |
| 85 | /* write buffer size defines */ |
| 86 | #define CYPRESS_BUF_SIZE 1024 |
| 87 | #define CYPRESS_CLOSING_WAIT (30*HZ) |
| 88 | |
| 89 | static struct usb_device_id id_table_earthmate [] = { |
| 90 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
Lonnie Mendez | 25b6f08 | 2005-05-10 17:09:52 -0500 | [diff] [blame] | 91 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | { } /* Terminating entry */ |
| 93 | }; |
| 94 | |
| 95 | static struct usb_device_id id_table_cyphidcomrs232 [] = { |
| 96 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
| 97 | { } /* Terminating entry */ |
| 98 | }; |
| 99 | |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 100 | static struct usb_device_id id_table_nokiaca42v2 [] = { |
| 101 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
| 102 | { } /* Terminating entry */ |
| 103 | }; |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | static struct usb_device_id id_table_combined [] = { |
| 106 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, |
Lonnie Mendez | 25b6f08 | 2005-05-10 17:09:52 -0500 | [diff] [blame] | 107 | { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 109 | { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { } /* Terminating entry */ |
| 111 | }; |
| 112 | |
| 113 | MODULE_DEVICE_TABLE (usb, id_table_combined); |
| 114 | |
| 115 | static struct usb_driver cypress_driver = { |
| 116 | .name = "cypress", |
| 117 | .probe = usb_serial_probe, |
| 118 | .disconnect = usb_serial_disconnect, |
| 119 | .id_table = id_table_combined, |
Greg Kroah-Hartman | ba9dc65 | 2005-11-16 13:41:28 -0800 | [diff] [blame] | 120 | .no_dynamic_id = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | }; |
| 122 | |
| 123 | struct cypress_private { |
| 124 | spinlock_t lock; /* private lock */ |
| 125 | int chiptype; /* identifier of device, for quirks/etc */ |
| 126 | int bytes_in; /* used for statistics */ |
| 127 | int bytes_out; /* used for statistics */ |
| 128 | int cmd_count; /* used for statistics */ |
| 129 | int cmd_ctrl; /* always set this to 1 before issuing a command */ |
| 130 | struct cypress_buf *buf; /* write buffer */ |
| 131 | int write_urb_in_use; /* write urb in use indicator */ |
| 132 | int termios_initialized; |
| 133 | __u8 line_control; /* holds dtr / rts value */ |
| 134 | __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ |
| 135 | __u8 current_config; /* stores the current configuration byte */ |
| 136 | __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ |
| 137 | int baud_rate; /* stores current baud rate in integer form */ |
| 138 | int cbr_mask; /* stores current baud rate in masked form */ |
| 139 | int isthrottled; /* if throttled, discard reads */ |
| 140 | wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ |
| 141 | char prev_status, diff_status; /* used for TIOCMIWAIT */ |
| 142 | /* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */ |
| 143 | struct termios tmp_termios; /* stores the old termios settings */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | }; |
| 145 | |
| 146 | /* write buffer structure */ |
| 147 | struct cypress_buf { |
| 148 | unsigned int buf_size; |
| 149 | char *buf_buf; |
| 150 | char *buf_get; |
| 151 | char *buf_put; |
| 152 | }; |
| 153 | |
| 154 | /* function prototypes for the Cypress USB to serial device */ |
| 155 | static int cypress_earthmate_startup (struct usb_serial *serial); |
| 156 | static int cypress_hidcom_startup (struct usb_serial *serial); |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 157 | static int cypress_ca42v2_startup (struct usb_serial *serial); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | static void cypress_shutdown (struct usb_serial *serial); |
| 159 | static int cypress_open (struct usb_serial_port *port, struct file *filp); |
| 160 | static void cypress_close (struct usb_serial_port *port, struct file *filp); |
| 161 | static int cypress_write (struct usb_serial_port *port, const unsigned char *buf, int count); |
| 162 | static void cypress_send (struct usb_serial_port *port); |
| 163 | static int cypress_write_room (struct usb_serial_port *port); |
| 164 | static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); |
| 165 | static void cypress_set_termios (struct usb_serial_port *port, struct termios * old); |
| 166 | static int cypress_tiocmget (struct usb_serial_port *port, struct file *file); |
| 167 | static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); |
| 168 | static int cypress_chars_in_buffer (struct usb_serial_port *port); |
| 169 | static void cypress_throttle (struct usb_serial_port *port); |
| 170 | static void cypress_unthrottle (struct usb_serial_port *port); |
| 171 | static void cypress_read_int_callback (struct urb *urb, struct pt_regs *regs); |
| 172 | static void cypress_write_int_callback (struct urb *urb, struct pt_regs *regs); |
| 173 | /* baud helper functions */ |
| 174 | static int mask_to_rate (unsigned mask); |
| 175 | static unsigned rate_to_mask (int rate); |
| 176 | /* write buffer functions */ |
| 177 | static struct cypress_buf *cypress_buf_alloc(unsigned int size); |
| 178 | static void cypress_buf_free(struct cypress_buf *cb); |
| 179 | static void cypress_buf_clear(struct cypress_buf *cb); |
| 180 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb); |
| 181 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 182 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, unsigned int count); |
| 183 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, unsigned int count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 186 | static struct usb_serial_driver cypress_earthmate_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 187 | .driver = { |
| 188 | .owner = THIS_MODULE, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 189 | .name = "earthmate", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 190 | }, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 191 | .description = "DeLorme Earthmate USB", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | .id_table = id_table_earthmate, |
| 193 | .num_interrupt_in = 1, |
| 194 | .num_interrupt_out = 1, |
| 195 | .num_bulk_in = NUM_DONT_CARE, |
| 196 | .num_bulk_out = NUM_DONT_CARE, |
| 197 | .num_ports = 1, |
| 198 | .attach = cypress_earthmate_startup, |
| 199 | .shutdown = cypress_shutdown, |
| 200 | .open = cypress_open, |
| 201 | .close = cypress_close, |
| 202 | .write = cypress_write, |
| 203 | .write_room = cypress_write_room, |
| 204 | .ioctl = cypress_ioctl, |
| 205 | .set_termios = cypress_set_termios, |
| 206 | .tiocmget = cypress_tiocmget, |
| 207 | .tiocmset = cypress_tiocmset, |
| 208 | .chars_in_buffer = cypress_chars_in_buffer, |
| 209 | .throttle = cypress_throttle, |
| 210 | .unthrottle = cypress_unthrottle, |
| 211 | .read_int_callback = cypress_read_int_callback, |
| 212 | .write_int_callback = cypress_write_int_callback, |
| 213 | }; |
| 214 | |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 215 | static struct usb_serial_driver cypress_hidcom_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 216 | .driver = { |
| 217 | .owner = THIS_MODULE, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 218 | .name = "cyphidcom", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 219 | }, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 220 | .description = "HID->COM RS232 Adapter", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | .id_table = id_table_cyphidcomrs232, |
| 222 | .num_interrupt_in = 1, |
| 223 | .num_interrupt_out = 1, |
| 224 | .num_bulk_in = NUM_DONT_CARE, |
| 225 | .num_bulk_out = NUM_DONT_CARE, |
| 226 | .num_ports = 1, |
| 227 | .attach = cypress_hidcom_startup, |
| 228 | .shutdown = cypress_shutdown, |
| 229 | .open = cypress_open, |
| 230 | .close = cypress_close, |
| 231 | .write = cypress_write, |
| 232 | .write_room = cypress_write_room, |
| 233 | .ioctl = cypress_ioctl, |
| 234 | .set_termios = cypress_set_termios, |
| 235 | .tiocmget = cypress_tiocmget, |
| 236 | .tiocmset = cypress_tiocmset, |
| 237 | .chars_in_buffer = cypress_chars_in_buffer, |
| 238 | .throttle = cypress_throttle, |
| 239 | .unthrottle = cypress_unthrottle, |
| 240 | .read_int_callback = cypress_read_int_callback, |
| 241 | .write_int_callback = cypress_write_int_callback, |
| 242 | }; |
| 243 | |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 244 | static struct usb_serial_driver cypress_ca42v2_device = { |
| 245 | .driver = { |
| 246 | .owner = THIS_MODULE, |
| 247 | .name = "nokiaca42v2", |
| 248 | }, |
| 249 | .description = "Nokia CA-42 V2 Adapter", |
| 250 | .id_table = id_table_nokiaca42v2, |
| 251 | .num_interrupt_in = 1, |
| 252 | .num_interrupt_out = 1, |
| 253 | .num_bulk_in = NUM_DONT_CARE, |
| 254 | .num_bulk_out = NUM_DONT_CARE, |
| 255 | .num_ports = 1, |
| 256 | .attach = cypress_ca42v2_startup, |
| 257 | .shutdown = cypress_shutdown, |
| 258 | .open = cypress_open, |
| 259 | .close = cypress_close, |
| 260 | .write = cypress_write, |
| 261 | .write_room = cypress_write_room, |
| 262 | .ioctl = cypress_ioctl, |
| 263 | .set_termios = cypress_set_termios, |
| 264 | .tiocmget = cypress_tiocmget, |
| 265 | .tiocmset = cypress_tiocmset, |
| 266 | .chars_in_buffer = cypress_chars_in_buffer, |
| 267 | .throttle = cypress_throttle, |
| 268 | .unthrottle = cypress_unthrottle, |
| 269 | .read_int_callback = cypress_read_int_callback, |
| 270 | .write_int_callback = cypress_write_int_callback, |
| 271 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
| 273 | /***************************************************************************** |
| 274 | * Cypress serial helper functions |
| 275 | *****************************************************************************/ |
| 276 | |
| 277 | |
Steven Cole | 093cf72 | 2005-05-03 19:07:24 -0600 | [diff] [blame] | 278 | /* This function can either set or retrieve the current serial line settings */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_mask, int data_bits, int stop_bits, |
| 280 | int parity_enable, int parity_type, int reset, int cypress_request_type) |
| 281 | { |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 282 | int new_baudrate = 0, retval = 0, tries = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | struct cypress_private *priv; |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 284 | __u8 feature_buffer[8]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | unsigned long flags; |
| 286 | |
| 287 | dbg("%s", __FUNCTION__); |
| 288 | |
| 289 | priv = usb_get_serial_port_data(port); |
| 290 | |
| 291 | switch(cypress_request_type) { |
| 292 | case CYPRESS_SET_CONFIG: |
| 293 | |
| 294 | /* |
| 295 | * The general purpose firmware for the Cypress M8 allows for a maximum speed |
| 296 | * of 57600bps (I have no idea whether DeLorme chose to use the general purpose |
| 297 | * firmware or not), if you need to modify this speed setting for your own |
| 298 | * project please add your own chiptype and modify the code likewise. The |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 299 | * Cypress HID->COM device will work successfully up to 115200bps (but the |
| 300 | * actual throughput is around 3kBps). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | */ |
| 302 | if (baud_mask != priv->cbr_mask) { |
| 303 | dbg("%s - baud rate is changing", __FUNCTION__); |
| 304 | if ( priv->chiptype == CT_EARTHMATE ) { |
| 305 | /* 300 and 600 baud rates are supported under the generic firmware, |
| 306 | * but are not used with NMEA and SiRF protocols */ |
| 307 | |
| 308 | if ( (baud_mask == B300) || (baud_mask == B600) ) { |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 309 | err("%s - failed setting baud rate, unsupported speed", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | __FUNCTION__); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 311 | new_baudrate = priv->baud_rate; |
| 312 | } else if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { |
| 313 | err("%s - failed setting baud rate, unsupported speed", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | __FUNCTION__); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 315 | new_baudrate = priv->baud_rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
| 317 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 318 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { |
| 319 | err("%s - failed setting baud rate, unsupported speed", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | __FUNCTION__); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 321 | new_baudrate = priv->baud_rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | } |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 323 | } else if (priv->chiptype == CT_CA42V2) { |
| 324 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { |
| 325 | err("%s - failed setting baud rate, unsupported speed", |
| 326 | __FUNCTION__); |
| 327 | new_baudrate = priv->baud_rate; |
| 328 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | } else if (priv->chiptype == CT_GENERIC) { |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 330 | if ( (new_baudrate = mask_to_rate(baud_mask)) == -1) { |
| 331 | err("%s - failed setting baud rate, unsupported speed", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | __FUNCTION__); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 333 | new_baudrate = priv->baud_rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | } |
| 335 | } else { |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 336 | info("%s - please define your chiptype", __FUNCTION__); |
| 337 | new_baudrate = priv->baud_rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | } else { /* baud rate not changing, keep the old */ |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 340 | new_baudrate = priv->baud_rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 342 | dbg("%s - baud rate is being sent as %d", __FUNCTION__, new_baudrate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 344 | memset(feature_buffer, 0, 8); |
| 345 | /* fill the feature_buffer with new configuration */ |
| 346 | *((u_int32_t *)feature_buffer) = new_baudrate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 348 | feature_buffer[4] |= data_bits; /* assign data bits in 2 bit space ( max 3 ) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | /* 1 bit gap */ |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 350 | feature_buffer[4] |= (stop_bits << 3); /* assign stop bits in 1 bit space */ |
| 351 | feature_buffer[4] |= (parity_enable << 4); /* assign parity flag in 1 bit space */ |
| 352 | feature_buffer[4] |= (parity_type << 5); /* assign parity type in 1 bit space */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | /* 1 bit gap */ |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 354 | feature_buffer[4] |= (reset << 7); /* assign reset at end of byte, 1 bit space */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | dbg("%s - device is being sent this feature report:", __FUNCTION__); |
| 357 | dbg("%s - %02X - %02X - %02X - %02X - %02X", __FUNCTION__, feature_buffer[0], feature_buffer[1], |
| 358 | feature_buffer[2], feature_buffer[3], feature_buffer[4]); |
| 359 | |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 360 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | retval = usb_control_msg (port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), |
| 362 | HID_REQ_SET_REPORT, USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 363 | 0x0300, 0, feature_buffer, 8, 500); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 365 | if (tries++ >= 3) |
| 366 | break; |
| 367 | |
| 368 | if (retval == EPIPE) |
| 369 | usb_clear_halt(port->serial->dev, 0x00); |
| 370 | } while (retval != 8 && retval != ENODEV); |
| 371 | |
| 372 | if (retval != 8) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | err("%s - failed sending serial line settings - %d", __FUNCTION__, retval); |
| 374 | else { |
| 375 | spin_lock_irqsave(&priv->lock, flags); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 376 | priv->baud_rate = new_baudrate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | priv->cbr_mask = baud_mask; |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 378 | priv->current_config = feature_buffer[4]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | spin_unlock_irqrestore(&priv->lock, flags); |
| 380 | } |
| 381 | break; |
| 382 | case CYPRESS_GET_CONFIG: |
| 383 | dbg("%s - retreiving serial line settings", __FUNCTION__); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 384 | /* set initial values in feature buffer */ |
| 385 | memset(feature_buffer, 0, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 387 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | retval = usb_control_msg (port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), |
| 389 | HID_REQ_GET_REPORT, USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 390 | 0x0300, 0, feature_buffer, 8, 500); |
| 391 | |
| 392 | if (tries++ >= 3) |
| 393 | break; |
| 394 | |
| 395 | if (retval == EPIPE) |
| 396 | usb_clear_halt(port->serial->dev, 0x00); |
| 397 | } while (retval != 5 && retval != ENODEV); |
| 398 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | if (retval != 5) { |
Adrian Bunk | 943ffb5 | 2006-01-10 00:10:13 +0100 | [diff] [blame] | 400 | err("%s - failed to retrieve serial line settings - %d", __FUNCTION__, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return retval; |
| 402 | } else { |
| 403 | spin_lock_irqsave(&priv->lock, flags); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | /* store the config in one byte, and later use bit masks to check values */ |
| 406 | priv->current_config = feature_buffer[4]; |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 407 | priv->baud_rate = *((u_int32_t *)feature_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 409 | if ( (priv->cbr_mask = rate_to_mask(priv->baud_rate)) == 0x40) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | dbg("%s - failed setting the baud mask (not defined)", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | spin_unlock_irqrestore(&priv->lock, flags); |
| 412 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 414 | spin_lock_irqsave(&priv->lock, flags); |
| 415 | ++priv->cmd_count; |
| 416 | spin_unlock_irqrestore(&priv->lock, flags); |
| 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return retval; |
| 419 | } /* cypress_serial_control */ |
| 420 | |
| 421 | |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 422 | /* given a baud mask, it will return integer baud on success */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | static int mask_to_rate (unsigned mask) |
| 424 | { |
| 425 | int rate; |
| 426 | |
| 427 | switch (mask) { |
| 428 | case B0: rate = 0; break; |
| 429 | case B300: rate = 300; break; |
| 430 | case B600: rate = 600; break; |
| 431 | case B1200: rate = 1200; break; |
| 432 | case B2400: rate = 2400; break; |
| 433 | case B4800: rate = 4800; break; |
| 434 | case B9600: rate = 9600; break; |
| 435 | case B19200: rate = 19200; break; |
| 436 | case B38400: rate = 38400; break; |
| 437 | case B57600: rate = 57600; break; |
| 438 | case B115200: rate = 115200; break; |
| 439 | default: rate = -1; |
| 440 | } |
| 441 | |
| 442 | return rate; |
| 443 | } |
| 444 | |
| 445 | |
| 446 | static unsigned rate_to_mask (int rate) |
| 447 | { |
| 448 | unsigned mask; |
| 449 | |
| 450 | switch (rate) { |
| 451 | case 0: mask = B0; break; |
| 452 | case 300: mask = B300; break; |
| 453 | case 600: mask = B600; break; |
| 454 | case 1200: mask = B1200; break; |
| 455 | case 2400: mask = B2400; break; |
| 456 | case 4800: mask = B4800; break; |
| 457 | case 9600: mask = B9600; break; |
| 458 | case 19200: mask = B19200; break; |
| 459 | case 38400: mask = B38400; break; |
| 460 | case 57600: mask = B57600; break; |
| 461 | case 115200: mask = B115200; break; |
| 462 | default: mask = 0x40; |
| 463 | } |
| 464 | |
| 465 | return mask; |
| 466 | } |
| 467 | /***************************************************************************** |
| 468 | * Cypress serial driver functions |
| 469 | *****************************************************************************/ |
| 470 | |
| 471 | |
| 472 | static int generic_startup (struct usb_serial *serial) |
| 473 | { |
| 474 | struct cypress_private *priv; |
| 475 | |
| 476 | dbg("%s - port %d", __FUNCTION__, serial->port[0]->number); |
| 477 | |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 478 | priv = kzalloc(sizeof (struct cypress_private), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | if (!priv) |
| 480 | return -ENOMEM; |
| 481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | spin_lock_init(&priv->lock); |
| 483 | priv->buf = cypress_buf_alloc(CYPRESS_BUF_SIZE); |
| 484 | if (priv->buf == NULL) { |
| 485 | kfree(priv); |
| 486 | return -ENOMEM; |
| 487 | } |
| 488 | init_waitqueue_head(&priv->delta_msr_wait); |
| 489 | |
| 490 | usb_reset_configuration (serial->dev); |
| 491 | |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 492 | interval = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | priv->cmd_ctrl = 0; |
| 494 | priv->line_control = 0; |
| 495 | priv->termios_initialized = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | priv->rx_flags = 0; |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 497 | priv->cbr_mask = B300; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | usb_set_serial_port_data(serial->port[0], priv); |
| 499 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 500 | return 0; |
| 501 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
| 503 | |
| 504 | static int cypress_earthmate_startup (struct usb_serial *serial) |
| 505 | { |
| 506 | struct cypress_private *priv; |
| 507 | |
| 508 | dbg("%s", __FUNCTION__); |
| 509 | |
| 510 | if (generic_startup(serial)) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 511 | dbg("%s - Failed setting up port %d", __FUNCTION__, |
| 512 | serial->port[0]->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | return 1; |
| 514 | } |
| 515 | |
| 516 | priv = usb_get_serial_port_data(serial->port[0]); |
| 517 | priv->chiptype = CT_EARTHMATE; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 518 | |
| 519 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | } /* cypress_earthmate_startup */ |
| 521 | |
| 522 | |
| 523 | static int cypress_hidcom_startup (struct usb_serial *serial) |
| 524 | { |
| 525 | struct cypress_private *priv; |
| 526 | |
| 527 | dbg("%s", __FUNCTION__); |
| 528 | |
| 529 | if (generic_startup(serial)) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 530 | dbg("%s - Failed setting up port %d", __FUNCTION__, |
| 531 | serial->port[0]->number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | return 1; |
| 533 | } |
| 534 | |
| 535 | priv = usb_get_serial_port_data(serial->port[0]); |
| 536 | priv->chiptype = CT_CYPHIDCOM; |
| 537 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 538 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } /* cypress_hidcom_startup */ |
| 540 | |
| 541 | |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 542 | static int cypress_ca42v2_startup (struct usb_serial *serial) |
| 543 | { |
| 544 | struct cypress_private *priv; |
| 545 | |
| 546 | dbg("%s", __FUNCTION__); |
| 547 | |
| 548 | if (generic_startup(serial)) { |
| 549 | dbg("%s - Failed setting up port %d", __FUNCTION__, |
| 550 | serial->port[0]->number); |
| 551 | return 1; |
| 552 | } |
| 553 | |
| 554 | priv = usb_get_serial_port_data(serial->port[0]); |
| 555 | priv->chiptype = CT_CA42V2; |
| 556 | |
| 557 | return 0; |
| 558 | } /* cypress_ca42v2_startup */ |
| 559 | |
| 560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | static void cypress_shutdown (struct usb_serial *serial) |
| 562 | { |
| 563 | struct cypress_private *priv; |
| 564 | |
| 565 | dbg ("%s - port %d", __FUNCTION__, serial->port[0]->number); |
| 566 | |
| 567 | /* all open ports are closed at this point */ |
| 568 | |
| 569 | priv = usb_get_serial_port_data(serial->port[0]); |
| 570 | |
| 571 | if (priv) { |
| 572 | cypress_buf_free(priv->buf); |
| 573 | kfree(priv); |
| 574 | usb_set_serial_port_data(serial->port[0], NULL); |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | |
| 579 | static int cypress_open (struct usb_serial_port *port, struct file *filp) |
| 580 | { |
| 581 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 582 | struct usb_serial *serial = port->serial; |
| 583 | unsigned long flags; |
| 584 | int result = 0; |
| 585 | |
| 586 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 587 | |
| 588 | /* clear halts before open */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | usb_clear_halt(serial->dev, 0x81); |
| 590 | usb_clear_halt(serial->dev, 0x02); |
| 591 | |
| 592 | spin_lock_irqsave(&priv->lock, flags); |
| 593 | /* reset read/write statistics */ |
| 594 | priv->bytes_in = 0; |
| 595 | priv->bytes_out = 0; |
| 596 | priv->cmd_count = 0; |
| 597 | priv->rx_flags = 0; |
| 598 | spin_unlock_irqrestore(&priv->lock, flags); |
| 599 | |
| 600 | /* setting to zero could cause data loss */ |
| 601 | port->tty->low_latency = 1; |
| 602 | |
| 603 | /* raise both lines and set termios */ |
| 604 | spin_lock_irqsave(&priv->lock, flags); |
| 605 | priv->line_control = CONTROL_DTR | CONTROL_RTS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | priv->cmd_ctrl = 1; |
| 607 | spin_unlock_irqrestore(&priv->lock, flags); |
| 608 | result = cypress_write(port, NULL, 0); |
| 609 | |
| 610 | if (result) { |
| 611 | dev_err(&port->dev, "%s - failed setting the control lines - error %d\n", __FUNCTION__, result); |
| 612 | return result; |
| 613 | } else |
| 614 | dbg("%s - success setting the control lines", __FUNCTION__); |
| 615 | |
| 616 | cypress_set_termios(port, &priv->tmp_termios); |
| 617 | |
| 618 | /* setup the port and start reading from the device */ |
| 619 | if(!port->interrupt_in_urb){ |
| 620 | err("%s - interrupt_in_urb is empty!", __FUNCTION__); |
| 621 | return(-1); |
| 622 | } |
| 623 | |
| 624 | usb_fill_int_urb(port->interrupt_in_urb, serial->dev, |
| 625 | usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), |
| 626 | port->interrupt_in_urb->transfer_buffer, port->interrupt_in_urb->transfer_buffer_length, |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 627 | cypress_read_int_callback, port, interval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
| 629 | |
| 630 | if (result){ |
| 631 | dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); |
| 632 | } |
| 633 | |
| 634 | return result; |
| 635 | } /* cypress_open */ |
| 636 | |
| 637 | |
| 638 | static void cypress_close(struct usb_serial_port *port, struct file * filp) |
| 639 | { |
| 640 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 641 | unsigned int c_cflag; |
| 642 | unsigned long flags; |
| 643 | int bps; |
| 644 | long timeout; |
| 645 | wait_queue_t wait; |
| 646 | |
| 647 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 648 | |
| 649 | /* wait for data to drain from buffer */ |
| 650 | spin_lock_irqsave(&priv->lock, flags); |
| 651 | timeout = CYPRESS_CLOSING_WAIT; |
| 652 | init_waitqueue_entry(&wait, current); |
| 653 | add_wait_queue(&port->tty->write_wait, &wait); |
| 654 | for (;;) { |
| 655 | set_current_state(TASK_INTERRUPTIBLE); |
| 656 | if (cypress_buf_data_avail(priv->buf) == 0 |
| 657 | || timeout == 0 || signal_pending(current) |
| 658 | || !usb_get_intfdata(port->serial->interface)) |
| 659 | break; |
| 660 | spin_unlock_irqrestore(&priv->lock, flags); |
| 661 | timeout = schedule_timeout(timeout); |
| 662 | spin_lock_irqsave(&priv->lock, flags); |
| 663 | } |
| 664 | set_current_state(TASK_RUNNING); |
| 665 | remove_wait_queue(&port->tty->write_wait, &wait); |
| 666 | /* clear out any remaining data in the buffer */ |
| 667 | cypress_buf_clear(priv->buf); |
| 668 | spin_unlock_irqrestore(&priv->lock, flags); |
| 669 | |
| 670 | /* wait for characters to drain from device */ |
| 671 | bps = tty_get_baud_rate(port->tty); |
| 672 | if (bps > 1200) |
| 673 | timeout = max((HZ*2560)/bps,HZ/10); |
| 674 | else |
| 675 | timeout = 2*HZ; |
Nishanth Aravamudan | 22c4386 | 2005-08-15 11:30:11 -0700 | [diff] [blame] | 676 | schedule_timeout_interruptible(timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
| 678 | dbg("%s - stopping urbs", __FUNCTION__); |
| 679 | usb_kill_urb (port->interrupt_in_urb); |
| 680 | usb_kill_urb (port->interrupt_out_urb); |
| 681 | |
| 682 | if (port->tty) { |
| 683 | c_cflag = port->tty->termios->c_cflag; |
| 684 | if (c_cflag & HUPCL) { |
| 685 | /* drop dtr and rts */ |
| 686 | priv = usb_get_serial_port_data(port); |
| 687 | spin_lock_irqsave(&priv->lock, flags); |
| 688 | priv->line_control = 0; |
| 689 | priv->cmd_ctrl = 1; |
| 690 | spin_unlock_irqrestore(&priv->lock, flags); |
| 691 | cypress_write(port, NULL, 0); |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | if (stats) |
| 696 | dev_info (&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", |
| 697 | priv->bytes_in, priv->bytes_out, priv->cmd_count); |
| 698 | } /* cypress_close */ |
| 699 | |
| 700 | |
| 701 | static int cypress_write(struct usb_serial_port *port, const unsigned char *buf, int count) |
| 702 | { |
| 703 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 704 | unsigned long flags; |
| 705 | |
| 706 | dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); |
| 707 | |
| 708 | /* line control commands, which need to be executed immediately, |
| 709 | are not put into the buffer for obvious reasons. |
| 710 | */ |
| 711 | if (priv->cmd_ctrl) { |
| 712 | count = 0; |
| 713 | goto finish; |
| 714 | } |
| 715 | |
| 716 | if (!count) |
| 717 | return count; |
| 718 | |
| 719 | spin_lock_irqsave(&priv->lock, flags); |
| 720 | count = cypress_buf_put(priv->buf, buf, count); |
| 721 | spin_unlock_irqrestore(&priv->lock, flags); |
| 722 | |
| 723 | finish: |
| 724 | cypress_send(port); |
| 725 | |
| 726 | return count; |
| 727 | } /* cypress_write */ |
| 728 | |
| 729 | |
| 730 | static void cypress_send(struct usb_serial_port *port) |
| 731 | { |
| 732 | int count = 0, result, offset, actual_size; |
| 733 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 734 | unsigned long flags; |
| 735 | |
| 736 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 737 | dbg("%s - interrupt out size is %d", __FUNCTION__, port->interrupt_out_size); |
| 738 | |
| 739 | spin_lock_irqsave(&priv->lock, flags); |
| 740 | if (priv->write_urb_in_use) { |
| 741 | dbg("%s - can't write, urb in use", __FUNCTION__); |
| 742 | spin_unlock_irqrestore(&priv->lock, flags); |
| 743 | return; |
| 744 | } |
| 745 | spin_unlock_irqrestore(&priv->lock, flags); |
| 746 | |
| 747 | /* clear buffer */ |
| 748 | memset(port->interrupt_out_urb->transfer_buffer, 0, port->interrupt_out_size); |
| 749 | |
| 750 | spin_lock_irqsave(&priv->lock, flags); |
| 751 | switch (port->interrupt_out_size) { |
| 752 | case 32: |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 753 | /* this is for the CY7C64013... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | offset = 2; |
| 755 | port->interrupt_out_buffer[0] = priv->line_control; |
| 756 | break; |
| 757 | case 8: |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 758 | /* this is for the CY7C63743... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | offset = 1; |
| 760 | port->interrupt_out_buffer[0] = priv->line_control; |
| 761 | break; |
| 762 | default: |
| 763 | dbg("%s - wrong packet size", __FUNCTION__); |
| 764 | spin_unlock_irqrestore(&priv->lock, flags); |
| 765 | return; |
| 766 | } |
| 767 | |
| 768 | if (priv->line_control & CONTROL_RESET) |
| 769 | priv->line_control &= ~CONTROL_RESET; |
| 770 | |
| 771 | if (priv->cmd_ctrl) { |
| 772 | priv->cmd_count++; |
| 773 | dbg("%s - line control command being issued", __FUNCTION__); |
| 774 | spin_unlock_irqrestore(&priv->lock, flags); |
| 775 | goto send; |
| 776 | } else |
| 777 | spin_unlock_irqrestore(&priv->lock, flags); |
| 778 | |
| 779 | count = cypress_buf_get(priv->buf, &port->interrupt_out_buffer[offset], |
| 780 | port->interrupt_out_size-offset); |
| 781 | |
| 782 | if (count == 0) { |
| 783 | return; |
| 784 | } |
| 785 | |
| 786 | switch (port->interrupt_out_size) { |
| 787 | case 32: |
| 788 | port->interrupt_out_buffer[1] = count; |
| 789 | break; |
| 790 | case 8: |
| 791 | port->interrupt_out_buffer[0] |= count; |
| 792 | } |
| 793 | |
| 794 | dbg("%s - count is %d", __FUNCTION__, count); |
| 795 | |
| 796 | send: |
| 797 | spin_lock_irqsave(&priv->lock, flags); |
| 798 | priv->write_urb_in_use = 1; |
| 799 | spin_unlock_irqrestore(&priv->lock, flags); |
| 800 | |
| 801 | if (priv->cmd_ctrl) |
| 802 | actual_size = 1; |
| 803 | else |
| 804 | actual_size = count + (port->interrupt_out_size == 32 ? 2 : 1); |
| 805 | |
| 806 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, port->interrupt_out_size, |
| 807 | port->interrupt_out_urb->transfer_buffer); |
| 808 | |
| 809 | port->interrupt_out_urb->transfer_buffer_length = actual_size; |
| 810 | port->interrupt_out_urb->dev = port->serial->dev; |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 811 | port->interrupt_out_urb->interval = interval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | result = usb_submit_urb (port->interrupt_out_urb, GFP_ATOMIC); |
| 813 | if (result) { |
| 814 | dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, |
| 815 | result); |
| 816 | priv->write_urb_in_use = 0; |
| 817 | } |
| 818 | |
| 819 | spin_lock_irqsave(&priv->lock, flags); |
| 820 | if (priv->cmd_ctrl) { |
| 821 | priv->cmd_ctrl = 0; |
| 822 | } |
| 823 | priv->bytes_out += count; /* do not count the line control and size bytes */ |
| 824 | spin_unlock_irqrestore(&priv->lock, flags); |
| 825 | |
Pete Zaitcev | cf2c748 | 2006-05-22 21:58:49 -0700 | [diff] [blame] | 826 | usb_serial_port_softint(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } /* cypress_send */ |
| 828 | |
| 829 | |
| 830 | /* returns how much space is available in the soft buffer */ |
| 831 | static int cypress_write_room(struct usb_serial_port *port) |
| 832 | { |
| 833 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 834 | int room = 0; |
| 835 | unsigned long flags; |
| 836 | |
| 837 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 838 | |
| 839 | spin_lock_irqsave(&priv->lock, flags); |
| 840 | room = cypress_buf_space_avail(priv->buf); |
| 841 | spin_unlock_irqrestore(&priv->lock, flags); |
| 842 | |
| 843 | dbg("%s - returns %d", __FUNCTION__, room); |
| 844 | return room; |
| 845 | } |
| 846 | |
| 847 | |
| 848 | static int cypress_tiocmget (struct usb_serial_port *port, struct file *file) |
| 849 | { |
| 850 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 851 | __u8 status, control; |
| 852 | unsigned int result = 0; |
| 853 | unsigned long flags; |
| 854 | |
| 855 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 856 | |
| 857 | spin_lock_irqsave(&priv->lock, flags); |
| 858 | control = priv->line_control; |
| 859 | status = priv->current_status; |
| 860 | spin_unlock_irqrestore(&priv->lock, flags); |
| 861 | |
| 862 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) |
| 863 | | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) |
| 864 | | ((status & UART_CTS) ? TIOCM_CTS : 0) |
| 865 | | ((status & UART_DSR) ? TIOCM_DSR : 0) |
| 866 | | ((status & UART_RI) ? TIOCM_RI : 0) |
| 867 | | ((status & UART_CD) ? TIOCM_CD : 0); |
| 868 | |
| 869 | dbg("%s - result = %x", __FUNCTION__, result); |
| 870 | |
| 871 | return result; |
| 872 | } |
| 873 | |
| 874 | |
| 875 | static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, |
| 876 | unsigned int set, unsigned int clear) |
| 877 | { |
| 878 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 879 | unsigned long flags; |
| 880 | |
| 881 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 882 | |
| 883 | spin_lock_irqsave(&priv->lock, flags); |
| 884 | if (set & TIOCM_RTS) |
| 885 | priv->line_control |= CONTROL_RTS; |
| 886 | if (set & TIOCM_DTR) |
| 887 | priv->line_control |= CONTROL_DTR; |
| 888 | if (clear & TIOCM_RTS) |
| 889 | priv->line_control &= ~CONTROL_RTS; |
| 890 | if (clear & TIOCM_DTR) |
| 891 | priv->line_control &= ~CONTROL_DTR; |
| 892 | spin_unlock_irqrestore(&priv->lock, flags); |
| 893 | |
| 894 | priv->cmd_ctrl = 1; |
| 895 | return cypress_write(port, NULL, 0); |
| 896 | } |
| 897 | |
| 898 | |
| 899 | static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) |
| 900 | { |
| 901 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 902 | |
| 903 | dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); |
| 904 | |
| 905 | switch (cmd) { |
| 906 | case TIOCGSERIAL: |
| 907 | if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { |
| 908 | return -EFAULT; |
| 909 | } |
| 910 | return (0); |
| 911 | break; |
| 912 | case TIOCSSERIAL: |
| 913 | if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { |
| 914 | return -EFAULT; |
| 915 | } |
| 916 | /* here we need to call cypress_set_termios to invoke the new settings */ |
| 917 | cypress_set_termios(port, &priv->tmp_termios); |
| 918 | return (0); |
| 919 | break; |
| 920 | /* these are called when setting baud rate from gpsd */ |
| 921 | case TCGETS: |
| 922 | if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { |
| 923 | return -EFAULT; |
| 924 | } |
| 925 | return (0); |
| 926 | break; |
| 927 | case TCSETS: |
| 928 | if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { |
| 929 | return -EFAULT; |
| 930 | } |
| 931 | /* here we need to call cypress_set_termios to invoke the new settings */ |
| 932 | cypress_set_termios(port, &priv->tmp_termios); |
| 933 | return (0); |
| 934 | break; |
| 935 | /* This code comes from drivers/char/serial.c and ftdi_sio.c */ |
| 936 | case TIOCMIWAIT: |
| 937 | while (priv != NULL) { |
| 938 | interruptible_sleep_on(&priv->delta_msr_wait); |
| 939 | /* see if a signal did it */ |
| 940 | if (signal_pending(current)) |
| 941 | return -ERESTARTSYS; |
| 942 | else { |
| 943 | char diff = priv->diff_status; |
| 944 | |
| 945 | if (diff == 0) { |
| 946 | return -EIO; /* no change => error */ |
| 947 | } |
| 948 | |
| 949 | /* consume all events */ |
| 950 | priv->diff_status = 0; |
| 951 | |
| 952 | /* return 0 if caller wanted to know about these bits */ |
| 953 | if ( ((arg & TIOCM_RNG) && (diff & UART_RI)) || |
| 954 | ((arg & TIOCM_DSR) && (diff & UART_DSR)) || |
| 955 | ((arg & TIOCM_CD) && (diff & UART_CD)) || |
| 956 | ((arg & TIOCM_CTS) && (diff & UART_CTS)) ) { |
| 957 | return 0; |
| 958 | } |
| 959 | /* otherwise caller can't care less about what happened, |
| 960 | * and so we continue to wait for more events. |
| 961 | */ |
| 962 | } |
| 963 | } |
| 964 | return 0; |
| 965 | break; |
| 966 | default: |
| 967 | break; |
| 968 | } |
| 969 | |
| 970 | dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __FUNCTION__, cmd); |
| 971 | |
| 972 | return -ENOIOCTLCMD; |
| 973 | } /* cypress_ioctl */ |
| 974 | |
| 975 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 976 | static void cypress_set_termios (struct usb_serial_port *port, |
| 977 | struct termios *old_termios) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | { |
| 979 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 980 | struct tty_struct *tty; |
| 981 | int data_bits, stop_bits, parity_type, parity_enable; |
| 982 | unsigned cflag, iflag, baud_mask; |
| 983 | unsigned long flags; |
| 984 | __u8 oldlines; |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 985 | int linechange = 0; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 986 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 988 | |
| 989 | tty = port->tty; |
| 990 | if ((!tty) || (!tty->termios)) { |
| 991 | dbg("%s - no tty structures", __FUNCTION__); |
| 992 | return; |
| 993 | } |
| 994 | |
| 995 | spin_lock_irqsave(&priv->lock, flags); |
| 996 | if (!priv->termios_initialized) { |
| 997 | if (priv->chiptype == CT_EARTHMATE) { |
| 998 | *(tty->termios) = tty_std_termios; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 999 | tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | |
| 1000 | CLOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | } else if (priv->chiptype == CT_CYPHIDCOM) { |
| 1002 | *(tty->termios) = tty_std_termios; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1003 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
| 1004 | CLOCAL; |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 1005 | } else if (priv->chiptype == CT_CA42V2) { |
| 1006 | *(tty->termios) = tty_std_termios; |
| 1007 | tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | |
| 1008 | CLOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
| 1010 | priv->termios_initialized = 1; |
| 1011 | } |
| 1012 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1013 | |
| 1014 | cflag = tty->termios->c_cflag; |
| 1015 | iflag = tty->termios->c_iflag; |
| 1016 | |
| 1017 | /* check if there are new settings */ |
| 1018 | if (old_termios) { |
| 1019 | if ((cflag != old_termios->c_cflag) || |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1020 | (RELEVANT_IFLAG(iflag) != |
| 1021 | RELEVANT_IFLAG(old_termios->c_iflag))) { |
| 1022 | dbg("%s - attempting to set new termios settings", |
| 1023 | __FUNCTION__); |
| 1024 | /* should make a copy of this in case something goes |
| 1025 | * wrong in the function, we can restore it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | spin_lock_irqsave(&priv->lock, flags); |
| 1027 | priv->tmp_termios = *(tty->termios); |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1028 | spin_unlock_irqrestore(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | } else { |
| 1030 | dbg("%s - nothing to do, exiting", __FUNCTION__); |
| 1031 | return; |
| 1032 | } |
| 1033 | } else |
| 1034 | return; |
| 1035 | |
| 1036 | /* set number of data bits, parity, stop bits */ |
| 1037 | /* when parity is disabled the parity type bit is ignored */ |
| 1038 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1039 | /* 1 means 2 stop bits, 0 means 1 stop bit */ |
| 1040 | stop_bits = cflag & CSTOPB ? 1 : 0; |
| 1041 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | if (cflag & PARENB) { |
| 1043 | parity_enable = 1; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1044 | /* 1 means odd parity, 0 means even parity */ |
| 1045 | parity_type = cflag & PARODD ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | } else |
| 1047 | parity_enable = parity_type = 0; |
| 1048 | |
| 1049 | if (cflag & CSIZE) { |
| 1050 | switch (cflag & CSIZE) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1051 | case CS5: |
| 1052 | data_bits = 0; |
| 1053 | break; |
| 1054 | case CS6: |
| 1055 | data_bits = 1; |
| 1056 | break; |
| 1057 | case CS7: |
| 1058 | data_bits = 2; |
| 1059 | break; |
| 1060 | case CS8: |
| 1061 | data_bits = 3; |
| 1062 | break; |
| 1063 | default: |
| 1064 | err("%s - CSIZE was set, but not CS5-CS8", |
| 1065 | __FUNCTION__); |
| 1066 | data_bits = 3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | } |
| 1068 | } else |
| 1069 | data_bits = 3; |
| 1070 | |
| 1071 | spin_lock_irqsave(&priv->lock, flags); |
| 1072 | oldlines = priv->line_control; |
| 1073 | if ((cflag & CBAUD) == B0) { |
| 1074 | /* drop dtr and rts */ |
| 1075 | dbg("%s - dropping the lines, baud rate 0bps", __FUNCTION__); |
| 1076 | baud_mask = B0; |
| 1077 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
| 1078 | } else { |
| 1079 | baud_mask = (cflag & CBAUD); |
| 1080 | switch(baud_mask) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1081 | case B300: |
| 1082 | dbg("%s - setting baud 300bps", __FUNCTION__); |
| 1083 | break; |
| 1084 | case B600: |
| 1085 | dbg("%s - setting baud 600bps", __FUNCTION__); |
| 1086 | break; |
| 1087 | case B1200: |
| 1088 | dbg("%s - setting baud 1200bps", __FUNCTION__); |
| 1089 | break; |
| 1090 | case B2400: |
| 1091 | dbg("%s - setting baud 2400bps", __FUNCTION__); |
| 1092 | break; |
| 1093 | case B4800: |
| 1094 | dbg("%s - setting baud 4800bps", __FUNCTION__); |
| 1095 | break; |
| 1096 | case B9600: |
| 1097 | dbg("%s - setting baud 9600bps", __FUNCTION__); |
| 1098 | break; |
| 1099 | case B19200: |
| 1100 | dbg("%s - setting baud 19200bps", __FUNCTION__); |
| 1101 | break; |
| 1102 | case B38400: |
| 1103 | dbg("%s - setting baud 38400bps", __FUNCTION__); |
| 1104 | break; |
| 1105 | case B57600: |
| 1106 | dbg("%s - setting baud 57600bps", __FUNCTION__); |
| 1107 | break; |
| 1108 | case B115200: |
| 1109 | dbg("%s - setting baud 115200bps", __FUNCTION__); |
| 1110 | break; |
| 1111 | default: |
| 1112 | dbg("%s - unknown masked baud rate", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | } |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 1114 | priv->line_control = (CONTROL_DTR | CONTROL_RTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | } |
| 1116 | spin_unlock_irqrestore(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1118 | dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, " |
| 1119 | "%d data_bits (+5)", __FUNCTION__, stop_bits, |
| 1120 | parity_enable, parity_type, data_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1122 | cypress_serial_control(port, baud_mask, data_bits, stop_bits, |
| 1123 | parity_enable, parity_type, 0, CYPRESS_SET_CONFIG); |
| 1124 | |
| 1125 | /* we perform a CYPRESS_GET_CONFIG so that the current settings are |
| 1126 | * filled into the private structure this should confirm that all is |
| 1127 | * working if it returns what we just set */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | cypress_serial_control(port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); |
| 1129 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1130 | /* Here we can define custom tty settings for devices; the main tty |
| 1131 | * termios flag base comes from empeg.c */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1133 | spin_lock_irqsave(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | if ( (priv->chiptype == CT_EARTHMATE) && (priv->baud_rate == 4800) ) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1135 | dbg("Using custom termios settings for a baud rate of " |
| 1136 | "4800bps."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | /* define custom termios settings for NMEA protocol */ |
| 1138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | tty->termios->c_iflag /* input modes - */ |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1140 | &= ~(IGNBRK /* disable ignore break */ |
| 1141 | | BRKINT /* disable break causes interrupt */ |
| 1142 | | PARMRK /* disable mark parity errors */ |
| 1143 | | ISTRIP /* disable clear high bit of input char */ |
| 1144 | | INLCR /* disable translate NL to CR */ |
| 1145 | | IGNCR /* disable ignore CR */ |
| 1146 | | ICRNL /* disable translate CR to NL */ |
| 1147 | | IXON); /* disable enable XON/XOFF flow control */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1149 | tty->termios->c_oflag /* output modes */ |
| 1150 | &= ~OPOST; /* disable postprocess output char */ |
| 1151 | |
| 1152 | tty->termios->c_lflag /* line discipline modes */ |
| 1153 | &= ~(ECHO /* disable echo input characters */ |
| 1154 | | ECHONL /* disable echo new line */ |
| 1155 | | ICANON /* disable erase, kill, werase, and rprnt |
| 1156 | special characters */ |
| 1157 | | ISIG /* disable interrupt, quit, and suspend |
| 1158 | special characters */ |
| 1159 | | IEXTEN); /* disable non-POSIX special characters */ |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 1160 | } /* CT_CYPHIDCOM: Application should handle this for device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | linechange = (priv->line_control != oldlines); |
| 1163 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1164 | |
| 1165 | /* if necessary, set lines */ |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 1166 | if (linechange) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | priv->cmd_ctrl = 1; |
| 1168 | cypress_write(port, NULL, 0); |
| 1169 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | } /* cypress_set_termios */ |
| 1171 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | /* returns amount of data still left in soft buffer */ |
| 1174 | static int cypress_chars_in_buffer(struct usb_serial_port *port) |
| 1175 | { |
| 1176 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 1177 | int chars = 0; |
| 1178 | unsigned long flags; |
| 1179 | |
| 1180 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 1181 | |
| 1182 | spin_lock_irqsave(&priv->lock, flags); |
| 1183 | chars = cypress_buf_data_avail(priv->buf); |
| 1184 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1185 | |
| 1186 | dbg("%s - returns %d", __FUNCTION__, chars); |
| 1187 | return chars; |
| 1188 | } |
| 1189 | |
| 1190 | |
| 1191 | static void cypress_throttle (struct usb_serial_port *port) |
| 1192 | { |
| 1193 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 1194 | unsigned long flags; |
| 1195 | |
| 1196 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 1197 | |
| 1198 | spin_lock_irqsave(&priv->lock, flags); |
| 1199 | priv->rx_flags = THROTTLED; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1200 | spin_unlock_irqrestore(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | } |
| 1202 | |
| 1203 | |
| 1204 | static void cypress_unthrottle (struct usb_serial_port *port) |
| 1205 | { |
| 1206 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 1207 | int actually_throttled, result; |
| 1208 | unsigned long flags; |
| 1209 | |
| 1210 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 1211 | |
| 1212 | spin_lock_irqsave(&priv->lock, flags); |
| 1213 | actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; |
| 1214 | priv->rx_flags = 0; |
| 1215 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1216 | |
| 1217 | if (actually_throttled) { |
| 1218 | port->interrupt_in_urb->dev = port->serial->dev; |
| 1219 | |
| 1220 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
| 1221 | if (result) |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1222 | dev_err(&port->dev, "%s - failed submitting read urb, " |
| 1223 | "error %d\n", __FUNCTION__, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | |
| 1228 | static void cypress_read_int_callback(struct urb *urb, struct pt_regs *regs) |
| 1229 | { |
| 1230 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; |
| 1231 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 1232 | struct tty_struct *tty; |
| 1233 | unsigned char *data = urb->transfer_buffer; |
| 1234 | unsigned long flags; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1235 | char tty_flag = TTY_NORMAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | int havedata = 0; |
| 1237 | int bytes = 0; |
| 1238 | int result; |
| 1239 | int i = 0; |
| 1240 | |
| 1241 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 1242 | |
| 1243 | if (urb->status) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1244 | dbg("%s - nonzero read status received: %d", __FUNCTION__, |
| 1245 | urb->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | return; |
| 1247 | } |
| 1248 | |
| 1249 | spin_lock_irqsave(&priv->lock, flags); |
| 1250 | if (priv->rx_flags & THROTTLED) { |
| 1251 | dbg("%s - now throttling", __FUNCTION__); |
| 1252 | priv->rx_flags |= ACTUALLY_THROTTLED; |
| 1253 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1254 | return; |
| 1255 | } |
| 1256 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1257 | |
| 1258 | tty = port->tty; |
| 1259 | if (!tty) { |
| 1260 | dbg("%s - bad tty pointer - exiting", __FUNCTION__); |
| 1261 | return; |
| 1262 | } |
| 1263 | |
| 1264 | spin_lock_irqsave(&priv->lock, flags); |
| 1265 | switch(urb->actual_length) { |
| 1266 | case 32: |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 1267 | /* This is for the CY7C64013... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | priv->current_status = data[0] & 0xF8; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1269 | bytes = data[1] + 2; |
| 1270 | i = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | if (bytes > 2) |
| 1272 | havedata = 1; |
| 1273 | break; |
| 1274 | case 8: |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 1275 | /* This is for the CY7C63743... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | priv->current_status = data[0] & 0xF8; |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1277 | bytes = (data[0] & 0x07) + 1; |
| 1278 | i = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | if (bytes > 1) |
| 1280 | havedata = 1; |
| 1281 | break; |
| 1282 | default: |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1283 | dbg("%s - wrong packet size - received %d bytes", |
| 1284 | __FUNCTION__, urb->actual_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1286 | goto continue_read; |
| 1287 | } |
| 1288 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1289 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1290 | usb_serial_debug_data (debug, &port->dev, __FUNCTION__, |
| 1291 | urb->actual_length, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | |
| 1293 | spin_lock_irqsave(&priv->lock, flags); |
| 1294 | /* check to see if status has changed */ |
| 1295 | if (priv != NULL) { |
| 1296 | if (priv->current_status != priv->prev_status) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1297 | priv->diff_status |= priv->current_status ^ |
| 1298 | priv->prev_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | wake_up_interruptible(&priv->delta_msr_wait); |
| 1300 | priv->prev_status = priv->current_status; |
| 1301 | } |
| 1302 | } |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1303 | spin_unlock_irqrestore(&priv->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1305 | /* hangup, as defined in acm.c... this might be a bad place for it |
| 1306 | * though */ |
| 1307 | if (tty && !(tty->termios->c_cflag & CLOCAL) && |
| 1308 | !(priv->current_status & UART_CD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | dbg("%s - calling hangup", __FUNCTION__); |
| 1310 | tty_hangup(tty); |
| 1311 | goto continue_read; |
| 1312 | } |
| 1313 | |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1314 | /* There is one error bit... I'm assuming it is a parity error |
| 1315 | * indicator as the generic firmware will set this bit to 1 if a |
| 1316 | * parity error occurs. |
| 1317 | * I can not find reference to any other error events. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | spin_lock_irqsave(&priv->lock, flags); |
| 1319 | if (priv->current_status & CYP_ERROR) { |
| 1320 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1321 | tty_flag = TTY_PARITY; |
| 1322 | dbg("%s - Parity Error detected", __FUNCTION__); |
| 1323 | } else |
| 1324 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1325 | |
| 1326 | /* process read if there is data other than line status */ |
| 1327 | if (tty && (bytes > i)) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 1328 | bytes = tty_buffer_request_room(tty, bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | for (; i < bytes ; ++i) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1330 | dbg("pushing byte number %d - %d - %c", i, data[i], |
| 1331 | data[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | tty_insert_flip_char(tty, data[i], tty_flag); |
| 1333 | } |
| 1334 | tty_flip_buffer_push(port->tty); |
| 1335 | } |
| 1336 | |
| 1337 | spin_lock_irqsave(&priv->lock, flags); |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1338 | /* control and status byte(s) are also counted */ |
| 1339 | priv->bytes_in += bytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | spin_unlock_irqrestore(&priv->lock, flags); |
| 1341 | |
| 1342 | continue_read: |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1343 | |
| 1344 | /* Continue trying to always read... unless the port has closed. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
| 1346 | if (port->open_count > 0) { |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1347 | usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, |
| 1348 | usb_rcvintpipe(port->serial->dev, |
| 1349 | port->interrupt_in_endpointAddress), |
| 1350 | port->interrupt_in_urb->transfer_buffer, |
| 1351 | port->interrupt_in_urb->transfer_buffer_length, |
| 1352 | cypress_read_int_callback, port, interval); |
| 1353 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
| 1354 | if (result) |
| 1355 | dev_err(&urb->dev->dev, "%s - failed resubmitting " |
| 1356 | "read urb, error %d\n", __FUNCTION__, |
| 1357 | result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | } |
Lonnie Mendez | b9db07f | 2005-07-12 17:21:31 -0500 | [diff] [blame] | 1359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | return; |
| 1361 | } /* cypress_read_int_callback */ |
| 1362 | |
| 1363 | |
| 1364 | static void cypress_write_int_callback(struct urb *urb, struct pt_regs *regs) |
| 1365 | { |
| 1366 | struct usb_serial_port *port = (struct usb_serial_port *)urb->context; |
| 1367 | struct cypress_private *priv = usb_get_serial_port_data(port); |
| 1368 | int result; |
| 1369 | |
| 1370 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 1371 | |
| 1372 | switch (urb->status) { |
| 1373 | case 0: |
| 1374 | /* success */ |
| 1375 | break; |
| 1376 | case -ECONNRESET: |
| 1377 | case -ENOENT: |
| 1378 | case -ESHUTDOWN: |
| 1379 | /* this urb is terminated, clean up */ |
| 1380 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
| 1381 | priv->write_urb_in_use = 0; |
| 1382 | return; |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 1383 | case -EPIPE: /* no break needed */ |
| 1384 | usb_clear_halt(port->serial->dev, 0x02); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | default: |
| 1386 | /* error in the urb, so we have to resubmit it */ |
| 1387 | dbg("%s - Overflow in write", __FUNCTION__); |
| 1388 | dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); |
| 1389 | port->interrupt_out_urb->transfer_buffer_length = 1; |
| 1390 | port->interrupt_out_urb->dev = port->serial->dev; |
| 1391 | result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); |
| 1392 | if (result) |
| 1393 | dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", |
| 1394 | __FUNCTION__, result); |
| 1395 | else |
| 1396 | return; |
| 1397 | } |
| 1398 | |
| 1399 | priv->write_urb_in_use = 0; |
| 1400 | |
| 1401 | /* send any buffered data */ |
| 1402 | cypress_send(port); |
| 1403 | } |
| 1404 | |
| 1405 | |
| 1406 | /***************************************************************************** |
| 1407 | * Write buffer functions - buffering code from pl2303 used |
| 1408 | *****************************************************************************/ |
| 1409 | |
| 1410 | /* |
| 1411 | * cypress_buf_alloc |
| 1412 | * |
| 1413 | * Allocate a circular buffer and all associated memory. |
| 1414 | */ |
| 1415 | |
| 1416 | static struct cypress_buf *cypress_buf_alloc(unsigned int size) |
| 1417 | { |
| 1418 | |
| 1419 | struct cypress_buf *cb; |
| 1420 | |
| 1421 | |
| 1422 | if (size == 0) |
| 1423 | return NULL; |
| 1424 | |
| 1425 | cb = (struct cypress_buf *)kmalloc(sizeof(struct cypress_buf), GFP_KERNEL); |
| 1426 | if (cb == NULL) |
| 1427 | return NULL; |
| 1428 | |
| 1429 | cb->buf_buf = kmalloc(size, GFP_KERNEL); |
| 1430 | if (cb->buf_buf == NULL) { |
| 1431 | kfree(cb); |
| 1432 | return NULL; |
| 1433 | } |
| 1434 | |
| 1435 | cb->buf_size = size; |
| 1436 | cb->buf_get = cb->buf_put = cb->buf_buf; |
| 1437 | |
| 1438 | return cb; |
| 1439 | |
| 1440 | } |
| 1441 | |
| 1442 | |
| 1443 | /* |
| 1444 | * cypress_buf_free |
| 1445 | * |
| 1446 | * Free the buffer and all associated memory. |
| 1447 | */ |
| 1448 | |
| 1449 | static void cypress_buf_free(struct cypress_buf *cb) |
| 1450 | { |
Jesper Juhl | 1bc3c9e | 2005-04-18 17:39:34 -0700 | [diff] [blame] | 1451 | if (cb) { |
| 1452 | kfree(cb->buf_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | kfree(cb); |
| 1454 | } |
| 1455 | } |
| 1456 | |
| 1457 | |
| 1458 | /* |
| 1459 | * cypress_buf_clear |
| 1460 | * |
| 1461 | * Clear out all data in the circular buffer. |
| 1462 | */ |
| 1463 | |
| 1464 | static void cypress_buf_clear(struct cypress_buf *cb) |
| 1465 | { |
| 1466 | if (cb != NULL) |
| 1467 | cb->buf_get = cb->buf_put; |
| 1468 | /* equivalent to a get of all data available */ |
| 1469 | } |
| 1470 | |
| 1471 | |
| 1472 | /* |
| 1473 | * cypress_buf_data_avail |
| 1474 | * |
| 1475 | * Return the number of bytes of data available in the circular |
| 1476 | * buffer. |
| 1477 | */ |
| 1478 | |
| 1479 | static unsigned int cypress_buf_data_avail(struct cypress_buf *cb) |
| 1480 | { |
| 1481 | if (cb != NULL) |
| 1482 | return ((cb->buf_size + cb->buf_put - cb->buf_get) % cb->buf_size); |
| 1483 | else |
| 1484 | return 0; |
| 1485 | } |
| 1486 | |
| 1487 | |
| 1488 | /* |
| 1489 | * cypress_buf_space_avail |
| 1490 | * |
| 1491 | * Return the number of bytes of space available in the circular |
| 1492 | * buffer. |
| 1493 | */ |
| 1494 | |
| 1495 | static unsigned int cypress_buf_space_avail(struct cypress_buf *cb) |
| 1496 | { |
| 1497 | if (cb != NULL) |
| 1498 | return ((cb->buf_size + cb->buf_get - cb->buf_put - 1) % cb->buf_size); |
| 1499 | else |
| 1500 | return 0; |
| 1501 | } |
| 1502 | |
| 1503 | |
| 1504 | /* |
| 1505 | * cypress_buf_put |
| 1506 | * |
| 1507 | * Copy data data from a user buffer and put it into the circular buffer. |
| 1508 | * Restrict to the amount of space available. |
| 1509 | * |
| 1510 | * Return the number of bytes copied. |
| 1511 | */ |
| 1512 | |
| 1513 | static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, |
| 1514 | unsigned int count) |
| 1515 | { |
| 1516 | |
| 1517 | unsigned int len; |
| 1518 | |
| 1519 | |
| 1520 | if (cb == NULL) |
| 1521 | return 0; |
| 1522 | |
| 1523 | len = cypress_buf_space_avail(cb); |
| 1524 | if (count > len) |
| 1525 | count = len; |
| 1526 | |
| 1527 | if (count == 0) |
| 1528 | return 0; |
| 1529 | |
| 1530 | len = cb->buf_buf + cb->buf_size - cb->buf_put; |
| 1531 | if (count > len) { |
| 1532 | memcpy(cb->buf_put, buf, len); |
| 1533 | memcpy(cb->buf_buf, buf+len, count - len); |
| 1534 | cb->buf_put = cb->buf_buf + count - len; |
| 1535 | } else { |
| 1536 | memcpy(cb->buf_put, buf, count); |
| 1537 | if (count < len) |
| 1538 | cb->buf_put += count; |
| 1539 | else /* count == len */ |
| 1540 | cb->buf_put = cb->buf_buf; |
| 1541 | } |
| 1542 | |
| 1543 | return count; |
| 1544 | |
| 1545 | } |
| 1546 | |
| 1547 | |
| 1548 | /* |
| 1549 | * cypress_buf_get |
| 1550 | * |
| 1551 | * Get data from the circular buffer and copy to the given buffer. |
| 1552 | * Restrict to the amount of data available. |
| 1553 | * |
| 1554 | * Return the number of bytes copied. |
| 1555 | */ |
| 1556 | |
| 1557 | static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, |
| 1558 | unsigned int count) |
| 1559 | { |
| 1560 | |
| 1561 | unsigned int len; |
| 1562 | |
| 1563 | |
| 1564 | if (cb == NULL) |
| 1565 | return 0; |
| 1566 | |
| 1567 | len = cypress_buf_data_avail(cb); |
| 1568 | if (count > len) |
| 1569 | count = len; |
| 1570 | |
| 1571 | if (count == 0) |
| 1572 | return 0; |
| 1573 | |
| 1574 | len = cb->buf_buf + cb->buf_size - cb->buf_get; |
| 1575 | if (count > len) { |
| 1576 | memcpy(buf, cb->buf_get, len); |
| 1577 | memcpy(buf+len, cb->buf_buf, count - len); |
| 1578 | cb->buf_get = cb->buf_buf + count - len; |
| 1579 | } else { |
| 1580 | memcpy(buf, cb->buf_get, count); |
| 1581 | if (count < len) |
| 1582 | cb->buf_get += count; |
| 1583 | else /* count == len */ |
| 1584 | cb->buf_get = cb->buf_buf; |
| 1585 | } |
| 1586 | |
| 1587 | return count; |
| 1588 | |
| 1589 | } |
| 1590 | |
| 1591 | /***************************************************************************** |
| 1592 | * Module functions |
| 1593 | *****************************************************************************/ |
| 1594 | |
| 1595 | static int __init cypress_init(void) |
| 1596 | { |
| 1597 | int retval; |
| 1598 | |
| 1599 | dbg("%s", __FUNCTION__); |
| 1600 | |
| 1601 | retval = usb_serial_register(&cypress_earthmate_device); |
| 1602 | if (retval) |
| 1603 | goto failed_em_register; |
| 1604 | retval = usb_serial_register(&cypress_hidcom_device); |
| 1605 | if (retval) |
| 1606 | goto failed_hidcom_register; |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 1607 | retval = usb_serial_register(&cypress_ca42v2_device); |
| 1608 | if (retval) |
| 1609 | goto failed_ca42v2_register; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | retval = usb_register(&cypress_driver); |
| 1611 | if (retval) |
| 1612 | goto failed_usb_register; |
| 1613 | |
| 1614 | info(DRIVER_DESC " " DRIVER_VERSION); |
| 1615 | return 0; |
| 1616 | failed_usb_register: |
| 1617 | usb_deregister(&cypress_driver); |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 1618 | failed_ca42v2_register: |
| 1619 | usb_serial_deregister(&cypress_ca42v2_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | failed_hidcom_register: |
| 1621 | usb_serial_deregister(&cypress_hidcom_device); |
| 1622 | failed_em_register: |
| 1623 | usb_serial_deregister(&cypress_earthmate_device); |
| 1624 | |
| 1625 | return retval; |
| 1626 | } |
| 1627 | |
| 1628 | |
| 1629 | static void __exit cypress_exit (void) |
| 1630 | { |
| 1631 | dbg("%s", __FUNCTION__); |
| 1632 | |
| 1633 | usb_deregister (&cypress_driver); |
| 1634 | usb_serial_deregister (&cypress_earthmate_device); |
| 1635 | usb_serial_deregister (&cypress_hidcom_device); |
Lonnie Mendez | a5c44e2 | 2006-03-01 10:45:24 -0600 | [diff] [blame] | 1636 | usb_serial_deregister (&cypress_ca42v2_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | } |
| 1638 | |
| 1639 | |
| 1640 | module_init(cypress_init); |
| 1641 | module_exit(cypress_exit); |
| 1642 | |
| 1643 | MODULE_AUTHOR( DRIVER_AUTHOR ); |
| 1644 | MODULE_DESCRIPTION( DRIVER_DESC ); |
| 1645 | MODULE_VERSION( DRIVER_VERSION ); |
| 1646 | MODULE_LICENSE("GPL"); |
| 1647 | |
| 1648 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 1649 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |
| 1650 | module_param(stats, bool, S_IRUGO | S_IWUSR); |
| 1651 | MODULE_PARM_DESC(stats, "Enable statistics or not"); |
Lonnie Mendez | 3cb4a4f | 2005-05-03 17:02:20 -0500 | [diff] [blame] | 1652 | module_param(interval, int, S_IRUGO | S_IWUSR); |
| 1653 | MODULE_PARM_DESC(interval, "Overrides interrupt interval"); |