pl2303.c revision 491b04ce1c9adfa0cd73f095086f3c37da81b667
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Prolific PL2303 USB to serial adaptor driver 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2003 IBM Corp. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Original driver for 2.2.x by anonymous 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License as published by 11502b95c1cc9e2c855a26f90fc999c5211b8ba957Greg Kroah-Hartman * the Free Software Foundation; either version 2 of the License. 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * See Documentation/usb/usb-serial.txt for more information on using this driver 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/config.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty_driver.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tty_flip.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/serial.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/moduleparam.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/spinlock.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/uaccess.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/usb.h> 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb-serial.h" 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "pl2303.h" 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Version Information 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int debug; 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PL2303_CLOSING_WAIT (30*HZ) 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PL2303_BUF_SIZE 1024 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PL2303_TMP_BUF_SIZE 1024 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct pl2303_buf { 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int buf_size; 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *buf_buf; 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *buf_get; 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *buf_put; 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_device_id id_table [] = { 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, 72a8310f3b8b713e52d77c56d4b8865685ee40d02aLuiz Fernando Capitulino { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, 74a8310f3b8b713e52d77c56d4b8865685ee40d02aLuiz Fernando Capitulino { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, 75acbb36f116243bed515357264ecbb6ff9c6d2a5bPeter Favrholdt { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, 76c6c27721a42b991965bb792d5c196b8331d008d5Christian Lindner { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, 77c6c27721a42b991965bb792d5c196b8331d008d5Christian Lindner { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, 786cceb05f8df6e28ab90f44bdeba50d33928cdee5Denis MONTERRAT { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, 79c6c27721a42b991965bb792d5c196b8331d008d5Christian Lindner { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, 80491b04ce1c9adfa0cd73f095086f3c37da81b667Dick Streefland { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { } /* Terminating entry */ 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DEVICE_TABLE (usb, id_table); 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_driver pl2303_driver = { 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "pl2303", 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .probe = usb_serial_probe, 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .disconnect = usb_serial_disconnect, 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .id_table = id_table, 91ba9dc657af86d05d2971633e57d1f6f94ed60472Greg Kroah-Hartman .no_dynamic_id = 1, 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SET_LINE_REQUEST_TYPE 0x21 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SET_LINE_REQUEST 0x20 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SET_CONTROL_REQUEST_TYPE 0x21 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SET_CONTROL_REQUEST 0x22 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CONTROL_DTR 0x01 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CONTROL_RTS 0x02 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define BREAK_REQUEST_TYPE 0x21 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define BREAK_REQUEST 0x23 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define BREAK_ON 0xffff 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define BREAK_OFF 0x0000 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GET_LINE_REQUEST_TYPE 0xa1 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define GET_LINE_REQUEST 0x21 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VENDOR_WRITE_REQUEST_TYPE 0x40 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VENDOR_WRITE_REQUEST 0x01 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VENDOR_READ_REQUEST_TYPE 0xc0 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VENDOR_READ_REQUEST 0x01 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_STATE 0x08 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_STATE_TRANSIENT_MASK 0x74 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_DCD 0x01 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_DSR 0x02 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_BREAK_ERROR 0x04 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_RING 0x08 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_FRAME_ERROR 0x10 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_PARITY_ERROR 0x20 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_OVERRUN_ERROR 0x40 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UART_CTS 0x80 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* function prototypes for a PL2303 serial converter */ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_open (struct usb_serial_port *port, struct file *filp); 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_close (struct usb_serial_port *port, struct file *filp); 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_set_termios (struct usb_serial_port *port, 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct termios *old); 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_ioctl (struct usb_serial_port *port, struct file *file, 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int cmd, unsigned long arg); 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs); 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_write (struct usb_serial_port *port, 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const unsigned char *buf, int count); 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_send (struct usb_serial_port *port); 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_write_room(struct usb_serial_port *port); 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_chars_in_buffer(struct usb_serial_port *port); 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_break_ctl(struct usb_serial_port *port,int break_state); 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_tiocmget (struct usb_serial_port *port, struct file *file); 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int set, unsigned int clear); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_startup (struct usb_serial *serial); 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_shutdown (struct usb_serial *serial); 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct pl2303_buf *pl2303_buf_alloc(unsigned int size); 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_buf_free(struct pl2303_buf *pb); 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_buf_clear(struct pl2303_buf *pb); 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb); 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb); 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int count); 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int count); 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* All of the device info needed for the PL2303 SIO serial converter */ 160ea65370d025f5005649e5cb37c4d025e92c6fc38Greg Kroah-Hartmanstatic struct usb_serial_driver pl2303_device = { 16118fcac353fdc7cd072b0d24c8667042e675a4c11Greg Kroah-Hartman .driver = { 16218fcac353fdc7cd072b0d24c8667042e675a4c11Greg Kroah-Hartman .owner = THIS_MODULE, 163269bda1c123c7caf88e1deb2264f9086f0344192Greg Kroah-Hartman .name = "pl2303", 16418fcac353fdc7cd072b0d24c8667042e675a4c11Greg Kroah-Hartman }, 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .id_table = id_table, 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .num_interrupt_in = NUM_DONT_CARE, 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .num_bulk_in = 1, 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .num_bulk_out = 1, 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .num_ports = 1, 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .open = pl2303_open, 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .close = pl2303_close, 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write = pl2303_write, 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .ioctl = pl2303_ioctl, 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .break_ctl = pl2303_break_ctl, 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .set_termios = pl2303_set_termios, 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .tiocmget = pl2303_tiocmget, 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .tiocmset = pl2303_tiocmset, 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .read_bulk_callback = pl2303_read_bulk_callback, 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .read_int_callback = pl2303_read_int_callback, 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write_bulk_callback = pl2303_write_bulk_callback, 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .write_room = pl2303_write_room, 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .chars_in_buffer = pl2303_chars_in_buffer, 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .attach = pl2303_startup, 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .shutdown = pl2303_shutdown, 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum pl2303_type { 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds type_0, /* don't know the difference between type 0 and */ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds type_1, /* type 1, until someone from prolific tells us... */ 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HX, /* HX version of the pl2303 chip */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct pl2303_private { 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t lock; 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_buf *buf; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int write_urb_in_use; 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_head_t delta_msr_wait; 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 line_control; 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 line_status; 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 termios_initialized; 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum pl2303_type type; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_startup (struct usb_serial *serial) 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv; 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum pl2303_type type = type_0; 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (serial->dev->descriptor.bDeviceClass == 0x02) 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds type = type_0; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds type = HX; 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (serial->dev->descriptor.bDeviceClass == 0x00) 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds type = type_1; 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (serial->dev->descriptor.bDeviceClass == 0xFF) 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds type = type_1; 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("device type: %d", type); 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < serial->num_ports; ++i) { 22280b6ca48321974a6566a1c9048ba34f60420bca6Eric Sesterhenn priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL); 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!priv) 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&priv->lock); 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE); 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (priv->buf == NULL) { 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(priv); 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto cleanup; 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_head(&priv->delta_msr_wait); 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->type = type; 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_serial_port_data(serial->port[i], priv); 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscleanup: 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (--i; i>=0; --i) { 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv = usb_get_serial_port_data(serial->port[i]); 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pl2303_buf_free(priv->buf); 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(priv); 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_serial_port_data(serial->port[i], NULL); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int set_control_lines (struct usb_device *dev, u8 value) 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0), 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value, 0, NULL, 0, 100); 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval); 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count) 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!count) 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return count; 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = pl2303_buf_put(priv->buf, buf, count); 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pl2303_send(port); 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return count; 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_send(struct usb_serial_port *port) 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int count, result; 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (priv->write_urb_in_use) { 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer, 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->bulk_out_size); 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count == 0) { 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->write_urb_in_use = 1; 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer); 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->write_urb->transfer_buffer_length = count; 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->write_urb->dev = port->serial->dev; 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = usb_submit_urb (port->write_urb, GFP_ATOMIC); 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (result) { 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result); 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->write_urb_in_use = 0; 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // TODO: reschedule pl2303_send 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds schedule_work(&port->work); 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_write_room(struct usb_serial_port *port) 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int room = 0; 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds room = pl2303_buf_space_avail(priv->buf); 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - returns %d", __FUNCTION__, room); 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return room; 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_chars_in_buffer(struct usb_serial_port *port) 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int chars = 0; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds chars = pl2303_buf_data_avail(priv->buf); 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - returns %d", __FUNCTION__, chars); 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return chars; 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios) 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial *serial = port->serial; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int cflag; 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *buf; 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int baud; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 control; 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((!port->tty) || (!port->tty->termios)) { 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - no tty structures", __FUNCTION__); 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!priv->termios_initialized) { 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(port->tty->termios) = tty_std_termios; 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->termios_initialized = 1; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cflag = port->tty->termios->c_cflag; 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* check that they really want us to change something */ 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old_termios) { 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cflag == old_termios->c_cflag) && 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - nothing to change...", __FUNCTION__); 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38680b6ca48321974a6566a1c9048ba34f60420bca6Eric Sesterhenn buf = kzalloc (7, GFP_KERNEL); 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!buf) { 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0), 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, 0, buf, 7, 100); 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & CSIZE) { 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (cflag & CSIZE) { 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CS5: buf[6] = 5; break; 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CS6: buf[6] = 6; break; 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CS7: buf[6] = 7; break; 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case CS8: buf[6] = 8; break; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - data bits = %d", __FUNCTION__, buf[6]); 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds baud = 0; 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (cflag & CBAUD) { 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B0: baud = 0; break; 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B75: baud = 75; break; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B150: baud = 150; break; 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B300: baud = 300; break; 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B600: baud = 600; break; 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B1200: baud = 1200; break; 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B1800: baud = 1800; break; 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B2400: baud = 2400; break; 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B4800: baud = 4800; break; 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B9600: baud = 9600; break; 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B19200: baud = 19200; break; 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B38400: baud = 38400; break; 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B57600: baud = 57600; break; 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B115200: baud = 115200; break; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B230400: baud = 230400; break; 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case B460800: baud = 460800; break; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n"); 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - baud = %d", __FUNCTION__, baud); 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (baud) { 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = baud & 0xff; 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = (baud >> 8) & 0xff; 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = (baud >> 16) & 0xff; 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[3] = (baud >> 24) & 0xff; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For reference buf[4]=0 is 1 stop bits */ 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For reference buf[4]=1 is 1.5 stop bits */ 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For reference buf[4]=2 is 2 stop bits */ 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & CSTOPB) { 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[4] = 2; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - stop bits = 2", __FUNCTION__); 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[4] = 0; 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - stop bits = 1", __FUNCTION__); 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & PARENB) { 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For reference buf[5]=0 is none parity */ 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For reference buf[5]=1 is odd parity */ 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For reference buf[5]=2 is even parity */ 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For reference buf[5]=3 is mark parity */ 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For reference buf[5]=4 is space parity */ 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & PARODD) { 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[5] = 1; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - parity = odd", __FUNCTION__); 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[5] = 2; 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - parity = even", __FUNCTION__); 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[5] = 0; 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - parity = none", __FUNCTION__); 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, 0, buf, 7, 100); 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg ("0x21:0x20:0:0 %d", i); 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* change control lines if we are switching to or from B0 */ 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds control = priv->line_control; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cflag & CBAUD) == B0) 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (control != priv->line_control) { 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds control = priv->line_control; 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_control_lines(serial->dev, control); 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0), 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, 0, buf, 7, 100); 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cflag & CRTSCTS) { 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __u16 index; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (priv->type == HX) 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds index = 0x61; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds index = 0x41; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = usb_control_msg(serial->dev, 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_sndctrlpipe(serial->dev, 0), 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VENDOR_WRITE_REQUEST, 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VENDOR_WRITE_REQUEST_TYPE, 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0x0, index, NULL, 0, 100); 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg ("0x40:0x1:0x0:0x%x %d", index, i); 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree (buf); 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_open (struct usb_serial_port *port, struct file *filp) 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct termios tmp_termios; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial *serial = port->serial; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *buf; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int result; 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5241694899fd1af43636351aac97f415fd3c9cefb1dDariusz M if (priv->type != HX) { 5251694899fd1af43636351aac97f415fd3c9cefb1dDariusz M usb_clear_halt(serial->dev, port->write_urb->pipe); 5261694899fd1af43636351aac97f415fd3c9cefb1dDariusz M usb_clear_halt(serial->dev, port->read_urb->pipe); 5271694899fd1af43636351aac97f415fd3c9cefb1dDariusz M } 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf = kmalloc(10, GFP_KERNEL); 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (buf==NULL) 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define FISH(a,b,c,d) \ 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \ 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b, a, c, d, buf, 1, 100); \ 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]); 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SOUP(a,b,c,d) \ 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \ 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b, a, c, d, NULL, 0, 100); \ 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result); 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0); 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1); 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1); 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (priv->type == HX) { 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* HX chip */ 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44); 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* reset upstream data pipes */ 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0); 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0); 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24); 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(buf); 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Setup termios */ 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port->tty) { 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pl2303_set_termios (port, &tmp_termios); 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds //FIXME: need to assert RTS and DTR if CRTSCTS off 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - submitting read urb", __FUNCTION__); 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->read_urb->dev = serial->dev; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = usb_submit_urb (port->read_urb, GFP_KERNEL); 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (result) { 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pl2303_close (port, NULL); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPROTO; 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - submitting interrupt urb", __FUNCTION__); 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->interrupt_in_urb->dev = serial->dev; 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL); 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (result) { 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result); 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pl2303_close (port, NULL); 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EPROTO; 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_close (struct usb_serial_port *port, struct file *filp) 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int c_cflag; 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int bps; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long timeout; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_queue_t wait; \ 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wait for data to drain from the buffer */ 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = PL2303_CLOSING_WAIT; 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_waitqueue_entry(&wait, current); 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds add_wait_queue(&port->tty->write_wait, &wait); 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_INTERRUPTIBLE); 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pl2303_buf_data_avail(priv->buf) == 0 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds || timeout == 0 || signal_pending(current) 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds || !usb_get_intfdata(port->serial->interface)) /* disconnect */ 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = schedule_timeout(timeout); 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_current_state(TASK_RUNNING); 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds remove_wait_queue(&port->tty->write_wait, &wait); 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* clear out any remaining data in the buffer */ 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pl2303_buf_clear(priv->buf); 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wait for characters to drain from the device */ 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* (this is long enough for the entire 256 byte */ 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* pl2303 hardware buffer to drain with no flow */ 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* control for data rates of 1200 bps or more, */ 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* for lower rates we should really know how much */ 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* data is in the buffer to compute a delay */ 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* that is not unnecessarily long) */ 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bps = tty_get_baud_rate(port->tty); 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bps > 1200) 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = max((HZ*2560)/bps,HZ/10); 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds timeout = 2*HZ; 63822c438632850c0d6257b45c90afed0cea6953afcNishanth Aravamudan schedule_timeout_interruptible(timeout); 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* shutdown our urbs */ 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - shutting down urbs", __FUNCTION__); 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kill_urb(port->write_urb); 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kill_urb(port->read_urb); 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_kill_urb(port->interrupt_in_urb); 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port->tty) { 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds c_cflag = port->tty->termios->c_cflag; 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (c_cflag & HUPCL) { 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* drop DTR and RTS */ 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->line_control = 0; 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&priv->lock, flags); 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_control_lines (port->serial->dev, 0); 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int set, unsigned int clear) 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 control; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6656fdd8e8e33730a2abc886113bd0b6c4343f63cc9Flavio Leitner if (!usb_get_intfdata(port->serial->interface)) 6666fdd8e8e33730a2abc886113bd0b6c4343f63cc9Flavio Leitner return -ENODEV; 6676fdd8e8e33730a2abc886113bd0b6c4343f63cc9Flavio Leitner 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&priv->lock, flags); 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (set & TIOCM_RTS) 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->line_control |= CONTROL_RTS; 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (set & TIOCM_DTR) 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->line_control |= CONTROL_DTR; 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (clear & TIOCM_RTS) 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->line_control &= ~CONTROL_RTS; 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (clear & TIOCM_DTR) 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->line_control &= ~CONTROL_DTR; 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds control = priv->line_control; 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&priv->lock, flags); 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return set_control_lines (port->serial->dev, control); 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_tiocmget (struct usb_serial_port *port, struct file *file) 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int mcr; 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int status; 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int result; 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s (%d)", __FUNCTION__, port->number); 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6936fdd8e8e33730a2abc886113bd0b6c4343f63cc9Flavio Leitner if (!usb_get_intfdata(port->serial->interface)) 6946fdd8e8e33730a2abc886113bd0b6c4343f63cc9Flavio Leitner return -ENODEV; 6956fdd8e8e33730a2abc886113bd0b6c4343f63cc9Flavio Leitner 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&priv->lock, flags); 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mcr = priv->line_control; 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = priv->line_status; 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&priv->lock, flags); 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | ((status & UART_CTS) ? TIOCM_CTS : 0) 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | ((status & UART_DSR) ? TIOCM_DSR : 0) 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | ((status & UART_RING) ? TIOCM_RI : 0) 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds | ((status & UART_DCD) ? TIOCM_CD : 0); 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - result = %x", __FUNCTION__, result); 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return result; 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int wait_modem_info(struct usb_serial_port *port, unsigned int arg) 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int prevstatus; 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int status; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int changed; 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&priv->lock, flags); 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prevstatus = priv->line_status; 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&priv->lock, flags); 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (1) { 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds interruptible_sleep_on(&priv->delta_msr_wait); 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* see if a signal did it */ 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ERESTARTSYS; 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave (&priv->lock, flags); 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = priv->line_status; 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore (&priv->lock, flags); 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds changed=prevstatus^status; 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (((arg & TIOCM_RNG) && (changed & UART_RING)) || 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((arg & TIOCM_DSR) && (changed & UART_DSR)) || 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((arg & TIOCM_CD) && (changed & UART_DCD)) || 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) { 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prevstatus = status; 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* NOTREACHED */ 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd); 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (cmd) { 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TIOCMIWAIT: 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return wait_modem_info(port, arg); 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s not supported = 0x%04x", __FUNCTION__, cmd); 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOIOCTLCMD; 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_break_ctl (struct usb_serial_port *port, int break_state) 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial *serial = port->serial; 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 state; 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int result; 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (break_state == 0) 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds state = BREAK_OFF; 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds state = BREAK_ON; 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on"); 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, NULL, 0, 100); 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (result) 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - error sending break = %d", __FUNCTION__, result); 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_shutdown (struct usb_serial *serial) 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s", __FUNCTION__); 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < serial->num_ports; ++i) { 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv = usb_get_serial_port_data(serial->port[i]); 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (priv) { 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pl2303_buf_free(priv->buf); 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(priv); 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_set_serial_port_data(serial->port[i], NULL); 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 80597bb13ec5bc156352cca8af90080597e04299a73Flavio Leitnerstatic void pl2303_update_line_status(struct usb_serial_port *port, 80697bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner unsigned char *data, 80797bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner unsigned int actual_length) 80897bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner{ 80997bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner 81097bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner struct pl2303_private *priv = usb_get_serial_port_data(port); 81197bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner unsigned long flags; 81297bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner u8 status_idx = UART_STATE; 81395f209f93663103db2a8fb989e226ac68a98b036Horst Schirmeier u8 length = UART_STATE + 1; 81497bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner 81597bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && 816b8f4c1d6674463e5824eada1ad7ec799276718bdLuiz Fernando Capitulino (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65 || 817b8f4c1d6674463e5824eada1ad7ec799276718bdLuiz Fernando Capitulino le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_SX1 || 818b8f4c1d6674463e5824eada1ad7ec799276718bdLuiz Fernando Capitulino le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X75)) { 81997bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner length = 1; 82097bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner status_idx = 0; 82197bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner } 82297bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner 82397bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner if (actual_length < length) 82497bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner goto exit; 82597bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner 82697bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner /* Save off the uart status for others to look at */ 82797bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner spin_lock_irqsave(&priv->lock, flags); 82897bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner priv->line_status = data[status_idx]; 82997bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner spin_unlock_irqrestore(&priv->lock, flags); 83096050b11f690878c19c1cd39970ab7325d91e18bJulian Bradfield wake_up_interruptible (&priv->delta_msr_wait); 83197bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner 83297bb13ec5bc156352cca8af90080597e04299a73Flavio Leitnerexit: 83397bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner return; 83497bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner} 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs) 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial_port *port = (struct usb_serial_port *) urb->context; 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *data = urb->transfer_buffer; 84097bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner unsigned int actual_length = urb->actual_length; 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int status; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s (%d)", __FUNCTION__, port->number); 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (urb->status) { 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* success */ 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case -ECONNRESET: 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case -ENOENT: 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case -ESHUTDOWN: 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* this urb is terminated, clean up */ 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto exit; 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer); 86197bb13ec5bc156352cca8af90080597e04299a73Flavio Leitner pl2303_update_line_status(port, data, actual_length); 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsexit: 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = usb_submit_urb (urb, GFP_ATOMIC); 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status) 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n", 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, status); 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs) 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial_port *port = (struct usb_serial_port *) urb->context; 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tty_struct *tty; 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *data = urb->transfer_buffer; 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int result; 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 status; 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char tty_flag; 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status) { 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - urb->status = %d", __FUNCTION__, urb->status); 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!port->open_count) { 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port is closed, exiting.", __FUNCTION__); 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (urb->status == -EPROTO) { 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* PL2303 mysteriously fails with -EPROTO reschedule the read */ 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__); 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->status = 0; 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->dev = port->serial->dev; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = usb_submit_urb(urb, GFP_ATOMIC); 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (result) 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - unable to handle the error, exiting.", __FUNCTION__); 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* get tty_flag from status */ 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_flag = TTY_NORMAL; 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&priv->lock, flags); 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = priv->line_status; 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&priv->lock, flags); 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wake_up_interruptible (&priv->delta_msr_wait); 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* break takes precedence over parity, */ 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* which takes precedence over framing errors */ 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & UART_BREAK_ERROR ) 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_flag = TTY_BREAK; 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (status & UART_PARITY_ERROR) 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_flag = TTY_PARITY; 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (status & UART_FRAME_ERROR) 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_flag = TTY_FRAME; 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag); 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty = port->tty; 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tty && urb->actual_length) { 92833f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox tty_buffer_request_room(tty, urb->actual_length + 1); 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* overrun is special, not associated with a char */ 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (status & UART_OVERRUN_ERROR) 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_insert_flip_char(tty, 0, TTY_OVERRUN); 93233f0f88f1c51ae5c2d593d26960c760ea154c2e2Alan Cox for (i = 0; i < urb->actual_length; ++i) 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_insert_flip_char (tty, data[i], tty_flag); 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tty_flip_buffer_push (tty); 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Schedule the next read _if_ we are still open */ 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (port->open_count) { 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds urb->dev = port->serial->dev; 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = usb_submit_urb(urb, GFP_ATOMIC); 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (result) 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs) 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_serial_port *port = (struct usb_serial_port *) urb->context; 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_private *priv = usb_get_serial_port_data(port); 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int result; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - port %d", __FUNCTION__, port->number); 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (urb->status) { 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case 0: 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* success */ 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case -ECONNRESET: 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case -ENOENT: 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case -ESHUTDOWN: 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* this urb is terminated, clean up */ 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->write_urb_in_use = 0; 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* error in the urb, so we have to resubmit it */ 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - Overflow in write", __FUNCTION__); 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->write_urb->transfer_buffer_length = 1; 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port->write_urb->dev = port->serial->dev; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds result = usb_submit_urb (port->write_urb, GFP_ATOMIC); 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (result) 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result); 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds priv->write_urb_in_use = 0; 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* send any buffered data */ 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pl2303_send(port); 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pl2303_buf_alloc 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Allocate a circular buffer and all associated memory. 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct pl2303_buf *pl2303_buf_alloc(unsigned int size) 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pl2303_buf *pb; 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (size == 0) 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL); 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pb == NULL) 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_buf = kmalloc(size, GFP_KERNEL); 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pb->buf_buf == NULL) { 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(pb); 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_size = size; 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_get = pb->buf_put = pb->buf_buf; 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pb; 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pl2303_buf_free 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free the buffer and all associated memory. 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_buf_free(struct pl2303_buf *pb) 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10301bc3c9e1e44c2059fe2ffa6ff70ad0a925d7b05fJesper Juhl if (pb) { 10311bc3c9e1e44c2059fe2ffa6ff70ad0a925d7b05fJesper Juhl kfree(pb->buf_buf); 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(pb); 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pl2303_buf_clear 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Clear out all data in the circular buffer. 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void pl2303_buf_clear(struct pl2303_buf *pb) 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pb != NULL) 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_get = pb->buf_put; 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* equivalent to a get of all data available */ 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pl2303_buf_data_avail 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return the number of bytes of data available in the circular 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffer. 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb) 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pb != NULL) 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size); 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pl2303_buf_space_avail 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return the number of bytes of space available in the circular 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffer. 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb) 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pb != NULL) 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size); 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pl2303_buf_put 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copy data data from a user buffer and put it into the circular buffer. 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Restrict to the amount of space available. 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return the number of bytes copied. 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int count) 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pb == NULL) 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = pl2303_buf_space_avail(pb); 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > len) 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = len; 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count == 0) 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = pb->buf_buf + pb->buf_size - pb->buf_put; 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > len) { 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(pb->buf_put, buf, len); 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(pb->buf_buf, buf+len, count - len); 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_put = pb->buf_buf + count - len; 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(pb->buf_put, buf, count); 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count < len) 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_put += count; 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else /* count == len */ 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_put = pb->buf_buf; 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return count; 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pl2303_buf_get 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Get data from the circular buffer and copy to the given buffer. 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Restrict to the amount of data available. 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Return the number of bytes copied. 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int count) 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pb == NULL) 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = pl2303_buf_data_avail(pb); 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > len) 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds count = len; 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count == 0) 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = pb->buf_buf + pb->buf_size - pb->buf_get; 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > len) { 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buf, pb->buf_get, len); 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buf+len, pb->buf_buf, count - len); 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_get = pb->buf_buf + count - len; 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(buf, pb->buf_get, count); 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count < len) 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_get += count; 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else /* count == len */ 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pb->buf_get = pb->buf_buf; 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return count; 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init pl2303_init (void) 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int retval; 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_serial_register(&pl2303_device); 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto failed_usb_serial_register; 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds retval = usb_register(&pl2303_driver); 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (retval) 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto failed_usb_register; 117917a882fc0c91477b2582a6dfd4ca93ae7eb58cd3Greg Kroah-Hartman info(DRIVER_DESC); 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfailed_usb_register: 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_serial_deregister(&pl2303_device); 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfailed_usb_serial_register: 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return retval; 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit pl2303_exit (void) 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_deregister (&pl2303_driver); 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_serial_deregister (&pl2303_device); 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(pl2303_init); 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(pl2303_exit); 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION(DRIVER_DESC); 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param(debug, bool, S_IRUGO | S_IWUSR); 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(debug, "Debug enabled or not"); 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1204