Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Prolific PL2303 USB to serial adaptor driver |
| 3 | * |
| 4 | * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) |
| 5 | * Copyright (C) 2003 IBM Corp. |
| 6 | * |
| 7 | * Original driver for 2.2.x by anonymous |
| 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 |
Greg Kroah-Hartman | 502b95c | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 11 | * the Free Software Foundation; either version 2 of the License. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * |
| 13 | * See Documentation/usb/usb-serial.txt for more information on using this driver |
| 14 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | */ |
| 16 | |
| 17 | #include <linux/config.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/errno.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/tty.h> |
| 23 | #include <linux/tty_driver.h> |
| 24 | #include <linux/tty_flip.h> |
| 25 | #include <linux/serial.h> |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/moduleparam.h> |
| 28 | #include <linux/spinlock.h> |
| 29 | #include <asm/uaccess.h> |
| 30 | #include <linux/usb.h> |
| 31 | #include "usb-serial.h" |
| 32 | #include "pl2303.h" |
| 33 | |
| 34 | /* |
| 35 | * Version Information |
| 36 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" |
| 38 | |
| 39 | static int debug; |
| 40 | |
| 41 | #define PL2303_CLOSING_WAIT (30*HZ) |
| 42 | |
| 43 | #define PL2303_BUF_SIZE 1024 |
| 44 | #define PL2303_TMP_BUF_SIZE 1024 |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | struct pl2303_buf { |
| 47 | unsigned int buf_size; |
| 48 | char *buf_buf; |
| 49 | char *buf_get; |
| 50 | char *buf_put; |
| 51 | }; |
| 52 | |
| 53 | static struct usb_device_id id_table [] = { |
| 54 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, |
| 55 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, |
| 56 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, |
| 57 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, |
| 58 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
| 59 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
| 60 | { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, |
| 61 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, |
| 62 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, |
| 63 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, |
| 64 | { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
| 65 | { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, |
| 66 | { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, |
| 67 | { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, |
| 68 | { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, |
| 69 | { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, |
| 70 | { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, |
| 71 | { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, |
Luiz Fernando Capitulino | a8310f3 | 2005-11-17 09:47:32 -0800 | [diff] [blame] | 72 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, |
Luiz Fernando Capitulino | a8310f3 | 2005-11-17 09:47:32 -0800 | [diff] [blame] | 74 | { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, |
Peter Favrholdt | acbb36f | 2005-04-18 17:39:32 -0700 | [diff] [blame] | 75 | { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, |
Christian Lindner | c6c2772 | 2006-02-01 14:10:52 +0100 | [diff] [blame] | 76 | { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, |
| 77 | { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, |
Denis MONTERRAT | 6cceb05 | 2006-01-19 14:52:38 +0100 | [diff] [blame] | 78 | { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, |
Christian Lindner | c6c2772 | 2006-02-01 14:10:52 +0100 | [diff] [blame] | 79 | { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, |
Dick Streefland | 491b04c | 2006-03-01 00:53:33 -0800 | [diff] [blame] | 80 | { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { } /* Terminating entry */ |
| 82 | }; |
| 83 | |
| 84 | MODULE_DEVICE_TABLE (usb, id_table); |
| 85 | |
| 86 | static struct usb_driver pl2303_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | .name = "pl2303", |
| 88 | .probe = usb_serial_probe, |
| 89 | .disconnect = usb_serial_disconnect, |
| 90 | .id_table = id_table, |
Greg Kroah-Hartman | ba9dc65 | 2005-11-16 13:41:28 -0800 | [diff] [blame] | 91 | .no_dynamic_id = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | }; |
| 93 | |
| 94 | #define SET_LINE_REQUEST_TYPE 0x21 |
| 95 | #define SET_LINE_REQUEST 0x20 |
| 96 | |
| 97 | #define SET_CONTROL_REQUEST_TYPE 0x21 |
| 98 | #define SET_CONTROL_REQUEST 0x22 |
| 99 | #define CONTROL_DTR 0x01 |
| 100 | #define CONTROL_RTS 0x02 |
| 101 | |
| 102 | #define BREAK_REQUEST_TYPE 0x21 |
| 103 | #define BREAK_REQUEST 0x23 |
| 104 | #define BREAK_ON 0xffff |
| 105 | #define BREAK_OFF 0x0000 |
| 106 | |
| 107 | #define GET_LINE_REQUEST_TYPE 0xa1 |
| 108 | #define GET_LINE_REQUEST 0x21 |
| 109 | |
| 110 | #define VENDOR_WRITE_REQUEST_TYPE 0x40 |
| 111 | #define VENDOR_WRITE_REQUEST 0x01 |
| 112 | |
| 113 | #define VENDOR_READ_REQUEST_TYPE 0xc0 |
| 114 | #define VENDOR_READ_REQUEST 0x01 |
| 115 | |
| 116 | #define UART_STATE 0x08 |
| 117 | #define UART_STATE_TRANSIENT_MASK 0x74 |
| 118 | #define UART_DCD 0x01 |
| 119 | #define UART_DSR 0x02 |
| 120 | #define UART_BREAK_ERROR 0x04 |
| 121 | #define UART_RING 0x08 |
| 122 | #define UART_FRAME_ERROR 0x10 |
| 123 | #define UART_PARITY_ERROR 0x20 |
| 124 | #define UART_OVERRUN_ERROR 0x40 |
| 125 | #define UART_CTS 0x80 |
| 126 | |
| 127 | /* function prototypes for a PL2303 serial converter */ |
| 128 | static int pl2303_open (struct usb_serial_port *port, struct file *filp); |
| 129 | static void pl2303_close (struct usb_serial_port *port, struct file *filp); |
| 130 | static void pl2303_set_termios (struct usb_serial_port *port, |
| 131 | struct termios *old); |
| 132 | static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, |
| 133 | unsigned int cmd, unsigned long arg); |
| 134 | static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs); |
| 135 | static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs); |
| 136 | static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs); |
| 137 | static int pl2303_write (struct usb_serial_port *port, |
| 138 | const unsigned char *buf, int count); |
| 139 | static void pl2303_send (struct usb_serial_port *port); |
| 140 | static int pl2303_write_room(struct usb_serial_port *port); |
| 141 | static int pl2303_chars_in_buffer(struct usb_serial_port *port); |
| 142 | static void pl2303_break_ctl(struct usb_serial_port *port,int break_state); |
| 143 | static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file); |
| 144 | static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, |
| 145 | unsigned int set, unsigned int clear); |
| 146 | static int pl2303_startup (struct usb_serial *serial); |
| 147 | static void pl2303_shutdown (struct usb_serial *serial); |
| 148 | static struct pl2303_buf *pl2303_buf_alloc(unsigned int size); |
| 149 | static void pl2303_buf_free(struct pl2303_buf *pb); |
| 150 | static void pl2303_buf_clear(struct pl2303_buf *pb); |
| 151 | static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb); |
| 152 | static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb); |
| 153 | static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, |
| 154 | unsigned int count); |
| 155 | static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, |
| 156 | unsigned int count); |
| 157 | |
| 158 | |
| 159 | /* All of the device info needed for the PL2303 SIO serial converter */ |
Greg Kroah-Hartman | ea65370 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 160 | static struct usb_serial_driver pl2303_device = { |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 161 | .driver = { |
| 162 | .owner = THIS_MODULE, |
Greg Kroah-Hartman | 269bda1 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 163 | .name = "pl2303", |
Greg Kroah-Hartman | 18fcac3 | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 164 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | .id_table = id_table, |
| 166 | .num_interrupt_in = NUM_DONT_CARE, |
| 167 | .num_bulk_in = 1, |
| 168 | .num_bulk_out = 1, |
| 169 | .num_ports = 1, |
| 170 | .open = pl2303_open, |
| 171 | .close = pl2303_close, |
| 172 | .write = pl2303_write, |
| 173 | .ioctl = pl2303_ioctl, |
| 174 | .break_ctl = pl2303_break_ctl, |
| 175 | .set_termios = pl2303_set_termios, |
| 176 | .tiocmget = pl2303_tiocmget, |
| 177 | .tiocmset = pl2303_tiocmset, |
| 178 | .read_bulk_callback = pl2303_read_bulk_callback, |
| 179 | .read_int_callback = pl2303_read_int_callback, |
| 180 | .write_bulk_callback = pl2303_write_bulk_callback, |
| 181 | .write_room = pl2303_write_room, |
| 182 | .chars_in_buffer = pl2303_chars_in_buffer, |
| 183 | .attach = pl2303_startup, |
| 184 | .shutdown = pl2303_shutdown, |
| 185 | }; |
| 186 | |
| 187 | enum pl2303_type { |
| 188 | type_0, /* don't know the difference between type 0 and */ |
| 189 | type_1, /* type 1, until someone from prolific tells us... */ |
| 190 | HX, /* HX version of the pl2303 chip */ |
| 191 | }; |
| 192 | |
| 193 | struct pl2303_private { |
| 194 | spinlock_t lock; |
| 195 | struct pl2303_buf *buf; |
| 196 | int write_urb_in_use; |
| 197 | wait_queue_head_t delta_msr_wait; |
| 198 | u8 line_control; |
| 199 | u8 line_status; |
| 200 | u8 termios_initialized; |
| 201 | enum pl2303_type type; |
| 202 | }; |
| 203 | |
| 204 | |
| 205 | static int pl2303_startup (struct usb_serial *serial) |
| 206 | { |
| 207 | struct pl2303_private *priv; |
| 208 | enum pl2303_type type = type_0; |
| 209 | int i; |
| 210 | |
| 211 | if (serial->dev->descriptor.bDeviceClass == 0x02) |
| 212 | type = type_0; |
| 213 | else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) |
| 214 | type = HX; |
| 215 | else if (serial->dev->descriptor.bDeviceClass == 0x00) |
| 216 | type = type_1; |
| 217 | else if (serial->dev->descriptor.bDeviceClass == 0xFF) |
| 218 | type = type_1; |
| 219 | dbg("device type: %d", type); |
| 220 | |
| 221 | for (i = 0; i < serial->num_ports; ++i) { |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 222 | priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | if (!priv) |
| 224 | goto cleanup; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | spin_lock_init(&priv->lock); |
| 226 | priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE); |
| 227 | if (priv->buf == NULL) { |
| 228 | kfree(priv); |
| 229 | goto cleanup; |
| 230 | } |
| 231 | init_waitqueue_head(&priv->delta_msr_wait); |
| 232 | priv->type = type; |
| 233 | usb_set_serial_port_data(serial->port[i], priv); |
| 234 | } |
| 235 | return 0; |
| 236 | |
| 237 | cleanup: |
| 238 | for (--i; i>=0; --i) { |
| 239 | priv = usb_get_serial_port_data(serial->port[i]); |
| 240 | pl2303_buf_free(priv->buf); |
| 241 | kfree(priv); |
| 242 | usb_set_serial_port_data(serial->port[i], NULL); |
| 243 | } |
| 244 | return -ENOMEM; |
| 245 | } |
| 246 | |
| 247 | static int set_control_lines (struct usb_device *dev, u8 value) |
| 248 | { |
| 249 | int retval; |
| 250 | |
| 251 | retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0), |
| 252 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, |
| 253 | value, 0, NULL, 0, 100); |
| 254 | dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval); |
| 255 | return retval; |
| 256 | } |
| 257 | |
| 258 | static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count) |
| 259 | { |
| 260 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 261 | unsigned long flags; |
| 262 | |
| 263 | dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); |
| 264 | |
| 265 | if (!count) |
| 266 | return count; |
| 267 | |
| 268 | spin_lock_irqsave(&priv->lock, flags); |
| 269 | count = pl2303_buf_put(priv->buf, buf, count); |
| 270 | spin_unlock_irqrestore(&priv->lock, flags); |
| 271 | |
| 272 | pl2303_send(port); |
| 273 | |
| 274 | return count; |
| 275 | } |
| 276 | |
| 277 | static void pl2303_send(struct usb_serial_port *port) |
| 278 | { |
| 279 | int count, result; |
| 280 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 281 | unsigned long flags; |
| 282 | |
| 283 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 284 | |
| 285 | spin_lock_irqsave(&priv->lock, flags); |
| 286 | |
| 287 | if (priv->write_urb_in_use) { |
| 288 | spin_unlock_irqrestore(&priv->lock, flags); |
| 289 | return; |
| 290 | } |
| 291 | |
| 292 | count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer, |
| 293 | port->bulk_out_size); |
| 294 | |
| 295 | if (count == 0) { |
| 296 | spin_unlock_irqrestore(&priv->lock, flags); |
| 297 | return; |
| 298 | } |
| 299 | |
| 300 | priv->write_urb_in_use = 1; |
| 301 | |
| 302 | spin_unlock_irqrestore(&priv->lock, flags); |
| 303 | |
| 304 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer); |
| 305 | |
| 306 | port->write_urb->transfer_buffer_length = count; |
| 307 | port->write_urb->dev = port->serial->dev; |
| 308 | result = usb_submit_urb (port->write_urb, GFP_ATOMIC); |
| 309 | if (result) { |
| 310 | dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result); |
| 311 | priv->write_urb_in_use = 0; |
| 312 | // TODO: reschedule pl2303_send |
| 313 | } |
| 314 | |
| 315 | schedule_work(&port->work); |
| 316 | } |
| 317 | |
| 318 | static int pl2303_write_room(struct usb_serial_port *port) |
| 319 | { |
| 320 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 321 | int room = 0; |
| 322 | unsigned long flags; |
| 323 | |
| 324 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 325 | |
| 326 | spin_lock_irqsave(&priv->lock, flags); |
| 327 | room = pl2303_buf_space_avail(priv->buf); |
| 328 | spin_unlock_irqrestore(&priv->lock, flags); |
| 329 | |
| 330 | dbg("%s - returns %d", __FUNCTION__, room); |
| 331 | return room; |
| 332 | } |
| 333 | |
| 334 | static int pl2303_chars_in_buffer(struct usb_serial_port *port) |
| 335 | { |
| 336 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 337 | int chars = 0; |
| 338 | unsigned long flags; |
| 339 | |
| 340 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 341 | |
| 342 | spin_lock_irqsave(&priv->lock, flags); |
| 343 | chars = pl2303_buf_data_avail(priv->buf); |
| 344 | spin_unlock_irqrestore(&priv->lock, flags); |
| 345 | |
| 346 | dbg("%s - returns %d", __FUNCTION__, chars); |
| 347 | return chars; |
| 348 | } |
| 349 | |
| 350 | static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios) |
| 351 | { |
| 352 | struct usb_serial *serial = port->serial; |
| 353 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 354 | unsigned long flags; |
| 355 | unsigned int cflag; |
| 356 | unsigned char *buf; |
| 357 | int baud; |
| 358 | int i; |
| 359 | u8 control; |
| 360 | |
| 361 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 362 | |
| 363 | if ((!port->tty) || (!port->tty->termios)) { |
| 364 | dbg("%s - no tty structures", __FUNCTION__); |
| 365 | return; |
| 366 | } |
| 367 | |
| 368 | spin_lock_irqsave(&priv->lock, flags); |
| 369 | if (!priv->termios_initialized) { |
| 370 | *(port->tty->termios) = tty_std_termios; |
| 371 | port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 372 | priv->termios_initialized = 1; |
| 373 | } |
| 374 | spin_unlock_irqrestore(&priv->lock, flags); |
| 375 | |
| 376 | cflag = port->tty->termios->c_cflag; |
| 377 | /* check that they really want us to change something */ |
| 378 | if (old_termios) { |
| 379 | if ((cflag == old_termios->c_cflag) && |
| 380 | (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { |
| 381 | dbg("%s - nothing to change...", __FUNCTION__); |
| 382 | return; |
| 383 | } |
| 384 | } |
| 385 | |
Eric Sesterhenn | 80b6ca4 | 2006-02-27 21:29:43 +0100 | [diff] [blame] | 386 | buf = kzalloc (7, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | if (!buf) { |
| 388 | dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); |
| 389 | return; |
| 390 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
| 392 | i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0), |
| 393 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, |
| 394 | 0, 0, buf, 7, 100); |
| 395 | dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, |
| 396 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); |
| 397 | |
| 398 | |
| 399 | if (cflag & CSIZE) { |
| 400 | switch (cflag & CSIZE) { |
| 401 | case CS5: buf[6] = 5; break; |
| 402 | case CS6: buf[6] = 6; break; |
| 403 | case CS7: buf[6] = 7; break; |
| 404 | default: |
| 405 | case CS8: buf[6] = 8; break; |
| 406 | } |
| 407 | dbg("%s - data bits = %d", __FUNCTION__, buf[6]); |
| 408 | } |
| 409 | |
| 410 | baud = 0; |
| 411 | switch (cflag & CBAUD) { |
| 412 | case B0: baud = 0; break; |
| 413 | case B75: baud = 75; break; |
| 414 | case B150: baud = 150; break; |
| 415 | case B300: baud = 300; break; |
| 416 | case B600: baud = 600; break; |
| 417 | case B1200: baud = 1200; break; |
| 418 | case B1800: baud = 1800; break; |
| 419 | case B2400: baud = 2400; break; |
| 420 | case B4800: baud = 4800; break; |
| 421 | case B9600: baud = 9600; break; |
| 422 | case B19200: baud = 19200; break; |
| 423 | case B38400: baud = 38400; break; |
| 424 | case B57600: baud = 57600; break; |
| 425 | case B115200: baud = 115200; break; |
| 426 | case B230400: baud = 230400; break; |
| 427 | case B460800: baud = 460800; break; |
| 428 | default: |
| 429 | dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n"); |
| 430 | break; |
| 431 | } |
| 432 | dbg("%s - baud = %d", __FUNCTION__, baud); |
| 433 | if (baud) { |
| 434 | buf[0] = baud & 0xff; |
| 435 | buf[1] = (baud >> 8) & 0xff; |
| 436 | buf[2] = (baud >> 16) & 0xff; |
| 437 | buf[3] = (baud >> 24) & 0xff; |
| 438 | } |
| 439 | |
| 440 | /* For reference buf[4]=0 is 1 stop bits */ |
| 441 | /* For reference buf[4]=1 is 1.5 stop bits */ |
| 442 | /* For reference buf[4]=2 is 2 stop bits */ |
| 443 | if (cflag & CSTOPB) { |
| 444 | buf[4] = 2; |
| 445 | dbg("%s - stop bits = 2", __FUNCTION__); |
| 446 | } else { |
| 447 | buf[4] = 0; |
| 448 | dbg("%s - stop bits = 1", __FUNCTION__); |
| 449 | } |
| 450 | |
| 451 | if (cflag & PARENB) { |
| 452 | /* For reference buf[5]=0 is none parity */ |
| 453 | /* For reference buf[5]=1 is odd parity */ |
| 454 | /* For reference buf[5]=2 is even parity */ |
| 455 | /* For reference buf[5]=3 is mark parity */ |
| 456 | /* For reference buf[5]=4 is space parity */ |
| 457 | if (cflag & PARODD) { |
| 458 | buf[5] = 1; |
| 459 | dbg("%s - parity = odd", __FUNCTION__); |
| 460 | } else { |
| 461 | buf[5] = 2; |
| 462 | dbg("%s - parity = even", __FUNCTION__); |
| 463 | } |
| 464 | } else { |
| 465 | buf[5] = 0; |
| 466 | dbg("%s - parity = none", __FUNCTION__); |
| 467 | } |
| 468 | |
| 469 | i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), |
| 470 | SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, |
| 471 | 0, 0, buf, 7, 100); |
| 472 | dbg ("0x21:0x20:0:0 %d", i); |
| 473 | |
| 474 | /* change control lines if we are switching to or from B0 */ |
| 475 | spin_lock_irqsave(&priv->lock, flags); |
| 476 | control = priv->line_control; |
| 477 | if ((cflag & CBAUD) == B0) |
| 478 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
| 479 | else |
| 480 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); |
| 481 | if (control != priv->line_control) { |
| 482 | control = priv->line_control; |
| 483 | spin_unlock_irqrestore(&priv->lock, flags); |
| 484 | set_control_lines(serial->dev, control); |
| 485 | } else { |
| 486 | spin_unlock_irqrestore(&priv->lock, flags); |
| 487 | } |
| 488 | |
| 489 | buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0; |
| 490 | |
| 491 | i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0), |
| 492 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, |
| 493 | 0, 0, buf, 7, 100); |
| 494 | dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, |
| 495 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); |
| 496 | |
| 497 | if (cflag & CRTSCTS) { |
| 498 | __u16 index; |
| 499 | if (priv->type == HX) |
| 500 | index = 0x61; |
| 501 | else |
| 502 | index = 0x41; |
| 503 | i = usb_control_msg(serial->dev, |
| 504 | usb_sndctrlpipe(serial->dev, 0), |
| 505 | VENDOR_WRITE_REQUEST, |
| 506 | VENDOR_WRITE_REQUEST_TYPE, |
| 507 | 0x0, index, NULL, 0, 100); |
| 508 | dbg ("0x40:0x1:0x0:0x%x %d", index, i); |
| 509 | } |
| 510 | |
| 511 | kfree (buf); |
| 512 | } |
| 513 | |
| 514 | static int pl2303_open (struct usb_serial_port *port, struct file *filp) |
| 515 | { |
| 516 | struct termios tmp_termios; |
| 517 | struct usb_serial *serial = port->serial; |
| 518 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 519 | unsigned char *buf; |
| 520 | int result; |
| 521 | |
| 522 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 523 | |
Dariusz M | 1694899 | 2005-07-28 18:06:13 +0200 | [diff] [blame] | 524 | if (priv->type != HX) { |
| 525 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
| 526 | usb_clear_halt(serial->dev, port->read_urb->pipe); |
| 527 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
| 529 | buf = kmalloc(10, GFP_KERNEL); |
| 530 | if (buf==NULL) |
| 531 | return -ENOMEM; |
| 532 | |
| 533 | #define FISH(a,b,c,d) \ |
| 534 | result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \ |
| 535 | b, a, c, d, buf, 1, 100); \ |
| 536 | dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]); |
| 537 | |
| 538 | #define SOUP(a,b,c,d) \ |
| 539 | result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \ |
| 540 | b, a, c, d, NULL, 0, 100); \ |
| 541 | dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result); |
| 542 | |
| 543 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
| 544 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0); |
| 545 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
| 546 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); |
| 547 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
| 548 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1); |
| 549 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
| 550 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); |
| 551 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1); |
| 552 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0); |
| 553 | |
| 554 | if (priv->type == HX) { |
| 555 | /* HX chip */ |
| 556 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44); |
| 557 | /* reset upstream data pipes */ |
| 558 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0); |
| 559 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0); |
| 560 | } else { |
| 561 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24); |
| 562 | } |
| 563 | |
| 564 | kfree(buf); |
| 565 | |
| 566 | /* Setup termios */ |
| 567 | if (port->tty) { |
| 568 | pl2303_set_termios (port, &tmp_termios); |
| 569 | } |
| 570 | |
| 571 | //FIXME: need to assert RTS and DTR if CRTSCTS off |
| 572 | |
| 573 | dbg("%s - submitting read urb", __FUNCTION__); |
| 574 | port->read_urb->dev = serial->dev; |
| 575 | result = usb_submit_urb (port->read_urb, GFP_KERNEL); |
| 576 | if (result) { |
| 577 | dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); |
| 578 | pl2303_close (port, NULL); |
| 579 | return -EPROTO; |
| 580 | } |
| 581 | |
| 582 | dbg("%s - submitting interrupt urb", __FUNCTION__); |
| 583 | port->interrupt_in_urb->dev = serial->dev; |
| 584 | result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL); |
| 585 | if (result) { |
| 586 | dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result); |
| 587 | pl2303_close (port, NULL); |
| 588 | return -EPROTO; |
| 589 | } |
| 590 | return 0; |
| 591 | } |
| 592 | |
| 593 | |
| 594 | static void pl2303_close (struct usb_serial_port *port, struct file *filp) |
| 595 | { |
| 596 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 597 | unsigned long flags; |
| 598 | unsigned int c_cflag; |
| 599 | int bps; |
| 600 | long timeout; |
| 601 | wait_queue_t wait; \ |
| 602 | |
| 603 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 604 | |
| 605 | /* wait for data to drain from the buffer */ |
| 606 | spin_lock_irqsave(&priv->lock, flags); |
| 607 | timeout = PL2303_CLOSING_WAIT; |
| 608 | init_waitqueue_entry(&wait, current); |
| 609 | add_wait_queue(&port->tty->write_wait, &wait); |
| 610 | for (;;) { |
| 611 | set_current_state(TASK_INTERRUPTIBLE); |
| 612 | if (pl2303_buf_data_avail(priv->buf) == 0 |
| 613 | || timeout == 0 || signal_pending(current) |
| 614 | || !usb_get_intfdata(port->serial->interface)) /* disconnect */ |
| 615 | break; |
| 616 | spin_unlock_irqrestore(&priv->lock, flags); |
| 617 | timeout = schedule_timeout(timeout); |
| 618 | spin_lock_irqsave(&priv->lock, flags); |
| 619 | } |
| 620 | set_current_state(TASK_RUNNING); |
| 621 | remove_wait_queue(&port->tty->write_wait, &wait); |
| 622 | /* clear out any remaining data in the buffer */ |
| 623 | pl2303_buf_clear(priv->buf); |
| 624 | spin_unlock_irqrestore(&priv->lock, flags); |
| 625 | |
| 626 | /* wait for characters to drain from the device */ |
| 627 | /* (this is long enough for the entire 256 byte */ |
| 628 | /* pl2303 hardware buffer to drain with no flow */ |
| 629 | /* control for data rates of 1200 bps or more, */ |
| 630 | /* for lower rates we should really know how much */ |
| 631 | /* data is in the buffer to compute a delay */ |
| 632 | /* that is not unnecessarily long) */ |
| 633 | bps = tty_get_baud_rate(port->tty); |
| 634 | if (bps > 1200) |
| 635 | timeout = max((HZ*2560)/bps,HZ/10); |
| 636 | else |
| 637 | timeout = 2*HZ; |
Nishanth Aravamudan | 22c4386 | 2005-08-15 11:30:11 -0700 | [diff] [blame] | 638 | schedule_timeout_interruptible(timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | |
| 640 | /* shutdown our urbs */ |
| 641 | dbg("%s - shutting down urbs", __FUNCTION__); |
| 642 | usb_kill_urb(port->write_urb); |
| 643 | usb_kill_urb(port->read_urb); |
| 644 | usb_kill_urb(port->interrupt_in_urb); |
| 645 | |
| 646 | if (port->tty) { |
| 647 | c_cflag = port->tty->termios->c_cflag; |
| 648 | if (c_cflag & HUPCL) { |
| 649 | /* drop DTR and RTS */ |
| 650 | spin_lock_irqsave(&priv->lock, flags); |
| 651 | priv->line_control = 0; |
| 652 | spin_unlock_irqrestore (&priv->lock, flags); |
| 653 | set_control_lines (port->serial->dev, 0); |
| 654 | } |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, |
| 659 | unsigned int set, unsigned int clear) |
| 660 | { |
| 661 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 662 | unsigned long flags; |
| 663 | u8 control; |
| 664 | |
Flavio Leitner | 6fdd8e8 | 2005-04-18 17:39:31 -0700 | [diff] [blame] | 665 | if (!usb_get_intfdata(port->serial->interface)) |
| 666 | return -ENODEV; |
| 667 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | spin_lock_irqsave (&priv->lock, flags); |
| 669 | if (set & TIOCM_RTS) |
| 670 | priv->line_control |= CONTROL_RTS; |
| 671 | if (set & TIOCM_DTR) |
| 672 | priv->line_control |= CONTROL_DTR; |
| 673 | if (clear & TIOCM_RTS) |
| 674 | priv->line_control &= ~CONTROL_RTS; |
| 675 | if (clear & TIOCM_DTR) |
| 676 | priv->line_control &= ~CONTROL_DTR; |
| 677 | control = priv->line_control; |
| 678 | spin_unlock_irqrestore (&priv->lock, flags); |
| 679 | |
| 680 | return set_control_lines (port->serial->dev, control); |
| 681 | } |
| 682 | |
| 683 | static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file) |
| 684 | { |
| 685 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 686 | unsigned long flags; |
| 687 | unsigned int mcr; |
| 688 | unsigned int status; |
| 689 | unsigned int result; |
| 690 | |
| 691 | dbg("%s (%d)", __FUNCTION__, port->number); |
| 692 | |
Flavio Leitner | 6fdd8e8 | 2005-04-18 17:39:31 -0700 | [diff] [blame] | 693 | if (!usb_get_intfdata(port->serial->interface)) |
| 694 | return -ENODEV; |
| 695 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | spin_lock_irqsave (&priv->lock, flags); |
| 697 | mcr = priv->line_control; |
| 698 | status = priv->line_status; |
| 699 | spin_unlock_irqrestore (&priv->lock, flags); |
| 700 | |
| 701 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) |
| 702 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) |
| 703 | | ((status & UART_CTS) ? TIOCM_CTS : 0) |
| 704 | | ((status & UART_DSR) ? TIOCM_DSR : 0) |
| 705 | | ((status & UART_RING) ? TIOCM_RI : 0) |
| 706 | | ((status & UART_DCD) ? TIOCM_CD : 0); |
| 707 | |
| 708 | dbg("%s - result = %x", __FUNCTION__, result); |
| 709 | |
| 710 | return result; |
| 711 | } |
| 712 | |
| 713 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) |
| 714 | { |
| 715 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 716 | unsigned long flags; |
| 717 | unsigned int prevstatus; |
| 718 | unsigned int status; |
| 719 | unsigned int changed; |
| 720 | |
| 721 | spin_lock_irqsave (&priv->lock, flags); |
| 722 | prevstatus = priv->line_status; |
| 723 | spin_unlock_irqrestore (&priv->lock, flags); |
| 724 | |
| 725 | while (1) { |
| 726 | interruptible_sleep_on(&priv->delta_msr_wait); |
| 727 | /* see if a signal did it */ |
| 728 | if (signal_pending(current)) |
| 729 | return -ERESTARTSYS; |
| 730 | |
| 731 | spin_lock_irqsave (&priv->lock, flags); |
| 732 | status = priv->line_status; |
| 733 | spin_unlock_irqrestore (&priv->lock, flags); |
| 734 | |
| 735 | changed=prevstatus^status; |
| 736 | |
| 737 | if (((arg & TIOCM_RNG) && (changed & UART_RING)) || |
| 738 | ((arg & TIOCM_DSR) && (changed & UART_DSR)) || |
| 739 | ((arg & TIOCM_CD) && (changed & UART_DCD)) || |
| 740 | ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) { |
| 741 | return 0; |
| 742 | } |
| 743 | prevstatus = status; |
| 744 | } |
| 745 | /* NOTREACHED */ |
| 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) |
| 750 | { |
| 751 | dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd); |
| 752 | |
| 753 | switch (cmd) { |
| 754 | case TIOCMIWAIT: |
| 755 | dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); |
| 756 | return wait_modem_info(port, arg); |
| 757 | |
| 758 | default: |
| 759 | dbg("%s not supported = 0x%04x", __FUNCTION__, cmd); |
| 760 | break; |
| 761 | } |
| 762 | |
| 763 | return -ENOIOCTLCMD; |
| 764 | } |
| 765 | |
| 766 | static void pl2303_break_ctl (struct usb_serial_port *port, int break_state) |
| 767 | { |
| 768 | struct usb_serial *serial = port->serial; |
| 769 | u16 state; |
| 770 | int result; |
| 771 | |
| 772 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 773 | |
| 774 | if (break_state == 0) |
| 775 | state = BREAK_OFF; |
| 776 | else |
| 777 | state = BREAK_ON; |
| 778 | dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on"); |
| 779 | |
| 780 | result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), |
| 781 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, |
| 782 | 0, NULL, 0, 100); |
| 783 | if (result) |
| 784 | dbg("%s - error sending break = %d", __FUNCTION__, result); |
| 785 | } |
| 786 | |
| 787 | |
| 788 | static void pl2303_shutdown (struct usb_serial *serial) |
| 789 | { |
| 790 | int i; |
| 791 | struct pl2303_private *priv; |
| 792 | |
| 793 | dbg("%s", __FUNCTION__); |
| 794 | |
| 795 | for (i = 0; i < serial->num_ports; ++i) { |
| 796 | priv = usb_get_serial_port_data(serial->port[i]); |
| 797 | if (priv) { |
| 798 | pl2303_buf_free(priv->buf); |
| 799 | kfree(priv); |
| 800 | usb_set_serial_port_data(serial->port[i], NULL); |
| 801 | } |
| 802 | } |
| 803 | } |
| 804 | |
Flavio Leitner | 97bb13e | 2005-04-18 17:39:31 -0700 | [diff] [blame] | 805 | static void pl2303_update_line_status(struct usb_serial_port *port, |
| 806 | unsigned char *data, |
| 807 | unsigned int actual_length) |
| 808 | { |
| 809 | |
| 810 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 811 | unsigned long flags; |
| 812 | u8 status_idx = UART_STATE; |
Horst Schirmeier | 95f209f | 2005-07-28 15:32:20 +0200 | [diff] [blame] | 813 | u8 length = UART_STATE + 1; |
Flavio Leitner | 97bb13e | 2005-04-18 17:39:31 -0700 | [diff] [blame] | 814 | |
| 815 | if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && |
Luiz Fernando Capitulino | b8f4c1d | 2005-11-17 09:47:36 -0800 | [diff] [blame] | 816 | (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65 || |
| 817 | le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_SX1 || |
| 818 | le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X75)) { |
Flavio Leitner | 97bb13e | 2005-04-18 17:39:31 -0700 | [diff] [blame] | 819 | length = 1; |
| 820 | status_idx = 0; |
| 821 | } |
| 822 | |
| 823 | if (actual_length < length) |
| 824 | goto exit; |
| 825 | |
| 826 | /* Save off the uart status for others to look at */ |
| 827 | spin_lock_irqsave(&priv->lock, flags); |
| 828 | priv->line_status = data[status_idx]; |
| 829 | spin_unlock_irqrestore(&priv->lock, flags); |
Julian Bradfield | 96050b1 | 2006-03-01 10:19:44 +0000 | [diff] [blame] | 830 | wake_up_interruptible (&priv->delta_msr_wait); |
Flavio Leitner | 97bb13e | 2005-04-18 17:39:31 -0700 | [diff] [blame] | 831 | |
| 832 | exit: |
| 833 | return; |
| 834 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | |
| 836 | static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs) |
| 837 | { |
| 838 | struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | unsigned char *data = urb->transfer_buffer; |
Flavio Leitner | 97bb13e | 2005-04-18 17:39:31 -0700 | [diff] [blame] | 840 | unsigned int actual_length = urb->actual_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | |
| 843 | dbg("%s (%d)", __FUNCTION__, port->number); |
| 844 | |
| 845 | switch (urb->status) { |
| 846 | case 0: |
| 847 | /* success */ |
| 848 | break; |
| 849 | case -ECONNRESET: |
| 850 | case -ENOENT: |
| 851 | case -ESHUTDOWN: |
| 852 | /* this urb is terminated, clean up */ |
| 853 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
| 854 | return; |
| 855 | default: |
| 856 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); |
| 857 | goto exit; |
| 858 | } |
| 859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer); |
Flavio Leitner | 97bb13e | 2005-04-18 17:39:31 -0700 | [diff] [blame] | 861 | pl2303_update_line_status(port, data, actual_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | exit: |
| 864 | status = usb_submit_urb (urb, GFP_ATOMIC); |
| 865 | if (status) |
| 866 | dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n", |
| 867 | __FUNCTION__, status); |
| 868 | } |
| 869 | |
| 870 | |
| 871 | static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs) |
| 872 | { |
| 873 | struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
| 874 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 875 | struct tty_struct *tty; |
| 876 | unsigned char *data = urb->transfer_buffer; |
| 877 | unsigned long flags; |
| 878 | int i; |
| 879 | int result; |
| 880 | u8 status; |
| 881 | char tty_flag; |
| 882 | |
| 883 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 884 | |
| 885 | if (urb->status) { |
| 886 | dbg("%s - urb->status = %d", __FUNCTION__, urb->status); |
| 887 | if (!port->open_count) { |
| 888 | dbg("%s - port is closed, exiting.", __FUNCTION__); |
| 889 | return; |
| 890 | } |
| 891 | if (urb->status == -EPROTO) { |
| 892 | /* PL2303 mysteriously fails with -EPROTO reschedule the read */ |
| 893 | dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__); |
| 894 | urb->status = 0; |
| 895 | urb->dev = port->serial->dev; |
| 896 | result = usb_submit_urb(urb, GFP_ATOMIC); |
| 897 | if (result) |
| 898 | dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); |
| 899 | return; |
| 900 | } |
| 901 | dbg("%s - unable to handle the error, exiting.", __FUNCTION__); |
| 902 | return; |
| 903 | } |
| 904 | |
| 905 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); |
| 906 | |
| 907 | /* get tty_flag from status */ |
| 908 | tty_flag = TTY_NORMAL; |
| 909 | |
| 910 | spin_lock_irqsave(&priv->lock, flags); |
| 911 | status = priv->line_status; |
| 912 | priv->line_status &= ~UART_STATE_TRANSIENT_MASK; |
| 913 | spin_unlock_irqrestore(&priv->lock, flags); |
| 914 | wake_up_interruptible (&priv->delta_msr_wait); |
| 915 | |
| 916 | /* break takes precedence over parity, */ |
| 917 | /* which takes precedence over framing errors */ |
| 918 | if (status & UART_BREAK_ERROR ) |
| 919 | tty_flag = TTY_BREAK; |
| 920 | else if (status & UART_PARITY_ERROR) |
| 921 | tty_flag = TTY_PARITY; |
| 922 | else if (status & UART_FRAME_ERROR) |
| 923 | tty_flag = TTY_FRAME; |
| 924 | dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag); |
| 925 | |
| 926 | tty = port->tty; |
| 927 | if (tty && urb->actual_length) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 928 | tty_buffer_request_room(tty, urb->actual_length + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | /* overrun is special, not associated with a char */ |
| 930 | if (status & UART_OVERRUN_ERROR) |
| 931 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 932 | for (i = 0; i < urb->actual_length; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | tty_insert_flip_char (tty, data[i], tty_flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | tty_flip_buffer_push (tty); |
| 935 | } |
| 936 | |
| 937 | /* Schedule the next read _if_ we are still open */ |
| 938 | if (port->open_count) { |
| 939 | urb->dev = port->serial->dev; |
| 940 | result = usb_submit_urb(urb, GFP_ATOMIC); |
| 941 | if (result) |
| 942 | dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); |
| 943 | } |
| 944 | |
| 945 | return; |
| 946 | } |
| 947 | |
| 948 | |
| 949 | |
| 950 | static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs) |
| 951 | { |
| 952 | struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
| 953 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
| 954 | int result; |
| 955 | |
| 956 | dbg("%s - port %d", __FUNCTION__, port->number); |
| 957 | |
| 958 | switch (urb->status) { |
| 959 | case 0: |
| 960 | /* success */ |
| 961 | break; |
| 962 | case -ECONNRESET: |
| 963 | case -ENOENT: |
| 964 | case -ESHUTDOWN: |
| 965 | /* this urb is terminated, clean up */ |
| 966 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
| 967 | priv->write_urb_in_use = 0; |
| 968 | return; |
| 969 | default: |
| 970 | /* error in the urb, so we have to resubmit it */ |
| 971 | dbg("%s - Overflow in write", __FUNCTION__); |
| 972 | dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); |
| 973 | port->write_urb->transfer_buffer_length = 1; |
| 974 | port->write_urb->dev = port->serial->dev; |
| 975 | result = usb_submit_urb (port->write_urb, GFP_ATOMIC); |
| 976 | if (result) |
| 977 | dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result); |
| 978 | else |
| 979 | return; |
| 980 | } |
| 981 | |
| 982 | priv->write_urb_in_use = 0; |
| 983 | |
| 984 | /* send any buffered data */ |
| 985 | pl2303_send(port); |
| 986 | } |
| 987 | |
| 988 | |
| 989 | /* |
| 990 | * pl2303_buf_alloc |
| 991 | * |
| 992 | * Allocate a circular buffer and all associated memory. |
| 993 | */ |
| 994 | |
| 995 | static struct pl2303_buf *pl2303_buf_alloc(unsigned int size) |
| 996 | { |
| 997 | |
| 998 | struct pl2303_buf *pb; |
| 999 | |
| 1000 | |
| 1001 | if (size == 0) |
| 1002 | return NULL; |
| 1003 | |
| 1004 | pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL); |
| 1005 | if (pb == NULL) |
| 1006 | return NULL; |
| 1007 | |
| 1008 | pb->buf_buf = kmalloc(size, GFP_KERNEL); |
| 1009 | if (pb->buf_buf == NULL) { |
| 1010 | kfree(pb); |
| 1011 | return NULL; |
| 1012 | } |
| 1013 | |
| 1014 | pb->buf_size = size; |
| 1015 | pb->buf_get = pb->buf_put = pb->buf_buf; |
| 1016 | |
| 1017 | return pb; |
| 1018 | |
| 1019 | } |
| 1020 | |
| 1021 | |
| 1022 | /* |
| 1023 | * pl2303_buf_free |
| 1024 | * |
| 1025 | * Free the buffer and all associated memory. |
| 1026 | */ |
| 1027 | |
| 1028 | static void pl2303_buf_free(struct pl2303_buf *pb) |
| 1029 | { |
Jesper Juhl | 1bc3c9e | 2005-04-18 17:39:34 -0700 | [diff] [blame] | 1030 | if (pb) { |
| 1031 | kfree(pb->buf_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | kfree(pb); |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | |
| 1037 | /* |
| 1038 | * pl2303_buf_clear |
| 1039 | * |
| 1040 | * Clear out all data in the circular buffer. |
| 1041 | */ |
| 1042 | |
| 1043 | static void pl2303_buf_clear(struct pl2303_buf *pb) |
| 1044 | { |
| 1045 | if (pb != NULL) |
| 1046 | pb->buf_get = pb->buf_put; |
| 1047 | /* equivalent to a get of all data available */ |
| 1048 | } |
| 1049 | |
| 1050 | |
| 1051 | /* |
| 1052 | * pl2303_buf_data_avail |
| 1053 | * |
| 1054 | * Return the number of bytes of data available in the circular |
| 1055 | * buffer. |
| 1056 | */ |
| 1057 | |
| 1058 | static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb) |
| 1059 | { |
| 1060 | if (pb != NULL) |
| 1061 | return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size); |
| 1062 | else |
| 1063 | return 0; |
| 1064 | } |
| 1065 | |
| 1066 | |
| 1067 | /* |
| 1068 | * pl2303_buf_space_avail |
| 1069 | * |
| 1070 | * Return the number of bytes of space available in the circular |
| 1071 | * buffer. |
| 1072 | */ |
| 1073 | |
| 1074 | static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb) |
| 1075 | { |
| 1076 | if (pb != NULL) |
| 1077 | return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size); |
| 1078 | else |
| 1079 | return 0; |
| 1080 | } |
| 1081 | |
| 1082 | |
| 1083 | /* |
| 1084 | * pl2303_buf_put |
| 1085 | * |
| 1086 | * Copy data data from a user buffer and put it into the circular buffer. |
| 1087 | * Restrict to the amount of space available. |
| 1088 | * |
| 1089 | * Return the number of bytes copied. |
| 1090 | */ |
| 1091 | |
| 1092 | static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, |
| 1093 | unsigned int count) |
| 1094 | { |
| 1095 | |
| 1096 | unsigned int len; |
| 1097 | |
| 1098 | |
| 1099 | if (pb == NULL) |
| 1100 | return 0; |
| 1101 | |
| 1102 | len = pl2303_buf_space_avail(pb); |
| 1103 | if (count > len) |
| 1104 | count = len; |
| 1105 | |
| 1106 | if (count == 0) |
| 1107 | return 0; |
| 1108 | |
| 1109 | len = pb->buf_buf + pb->buf_size - pb->buf_put; |
| 1110 | if (count > len) { |
| 1111 | memcpy(pb->buf_put, buf, len); |
| 1112 | memcpy(pb->buf_buf, buf+len, count - len); |
| 1113 | pb->buf_put = pb->buf_buf + count - len; |
| 1114 | } else { |
| 1115 | memcpy(pb->buf_put, buf, count); |
| 1116 | if (count < len) |
| 1117 | pb->buf_put += count; |
| 1118 | else /* count == len */ |
| 1119 | pb->buf_put = pb->buf_buf; |
| 1120 | } |
| 1121 | |
| 1122 | return count; |
| 1123 | |
| 1124 | } |
| 1125 | |
| 1126 | |
| 1127 | /* |
| 1128 | * pl2303_buf_get |
| 1129 | * |
| 1130 | * Get data from the circular buffer and copy to the given buffer. |
| 1131 | * Restrict to the amount of data available. |
| 1132 | * |
| 1133 | * Return the number of bytes copied. |
| 1134 | */ |
| 1135 | |
| 1136 | static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, |
| 1137 | unsigned int count) |
| 1138 | { |
| 1139 | |
| 1140 | unsigned int len; |
| 1141 | |
| 1142 | |
| 1143 | if (pb == NULL) |
| 1144 | return 0; |
| 1145 | |
| 1146 | len = pl2303_buf_data_avail(pb); |
| 1147 | if (count > len) |
| 1148 | count = len; |
| 1149 | |
| 1150 | if (count == 0) |
| 1151 | return 0; |
| 1152 | |
| 1153 | len = pb->buf_buf + pb->buf_size - pb->buf_get; |
| 1154 | if (count > len) { |
| 1155 | memcpy(buf, pb->buf_get, len); |
| 1156 | memcpy(buf+len, pb->buf_buf, count - len); |
| 1157 | pb->buf_get = pb->buf_buf + count - len; |
| 1158 | } else { |
| 1159 | memcpy(buf, pb->buf_get, count); |
| 1160 | if (count < len) |
| 1161 | pb->buf_get += count; |
| 1162 | else /* count == len */ |
| 1163 | pb->buf_get = pb->buf_buf; |
| 1164 | } |
| 1165 | |
| 1166 | return count; |
| 1167 | |
| 1168 | } |
| 1169 | |
| 1170 | static int __init pl2303_init (void) |
| 1171 | { |
| 1172 | int retval; |
| 1173 | retval = usb_serial_register(&pl2303_device); |
| 1174 | if (retval) |
| 1175 | goto failed_usb_serial_register; |
| 1176 | retval = usb_register(&pl2303_driver); |
| 1177 | if (retval) |
| 1178 | goto failed_usb_register; |
Greg Kroah-Hartman | 17a882f | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 1179 | info(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | return 0; |
| 1181 | failed_usb_register: |
| 1182 | usb_serial_deregister(&pl2303_device); |
| 1183 | failed_usb_serial_register: |
| 1184 | return retval; |
| 1185 | } |
| 1186 | |
| 1187 | |
| 1188 | static void __exit pl2303_exit (void) |
| 1189 | { |
| 1190 | usb_deregister (&pl2303_driver); |
| 1191 | usb_serial_deregister (&pl2303_device); |
| 1192 | } |
| 1193 | |
| 1194 | |
| 1195 | module_init(pl2303_init); |
| 1196 | module_exit(pl2303_exit); |
| 1197 | |
| 1198 | MODULE_DESCRIPTION(DRIVER_DESC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | MODULE_LICENSE("GPL"); |
| 1200 | |
| 1201 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 1202 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |
| 1203 | |