849 lines
23 KiB
C
849 lines
23 KiB
C
/*
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* Prolific PL2303 USB to serial adaptor driver
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*
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* Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2003 IBM Corp.
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*
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* Original driver for 2.2.x by anonymous
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* See Documentation/usb/usb-serial.txt for more information on using this
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* driver
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/spinlock.h>
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#include <linux/uaccess.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include "pl2303.h"
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/*
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* Version Information
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*/
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#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
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{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
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{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
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{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
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{ USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
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{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
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{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
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{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
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{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
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{ USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
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{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
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{ USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
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{ USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
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{ USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
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{ USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
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{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
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{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
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{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
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{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
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{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
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{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
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{ USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
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{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
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{ USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
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{ USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
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{ USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
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{ USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
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{ USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
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{ USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
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{ USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
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{ USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
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{ USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
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{ USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
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{ USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
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{ USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
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{ USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
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{ USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
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{ USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
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{ USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
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{ USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
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{ USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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#define SET_LINE_REQUEST_TYPE 0x21
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#define SET_LINE_REQUEST 0x20
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#define SET_CONTROL_REQUEST_TYPE 0x21
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#define SET_CONTROL_REQUEST 0x22
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#define CONTROL_DTR 0x01
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#define CONTROL_RTS 0x02
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#define BREAK_REQUEST_TYPE 0x21
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#define BREAK_REQUEST 0x23
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#define BREAK_ON 0xffff
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#define BREAK_OFF 0x0000
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#define GET_LINE_REQUEST_TYPE 0xa1
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#define GET_LINE_REQUEST 0x21
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#define VENDOR_WRITE_REQUEST_TYPE 0x40
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#define VENDOR_WRITE_REQUEST 0x01
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#define VENDOR_READ_REQUEST_TYPE 0xc0
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#define VENDOR_READ_REQUEST 0x01
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#define UART_STATE 0x08
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#define UART_STATE_TRANSIENT_MASK 0x74
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#define UART_DCD 0x01
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#define UART_DSR 0x02
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#define UART_BREAK_ERROR 0x04
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#define UART_RING 0x08
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#define UART_FRAME_ERROR 0x10
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#define UART_PARITY_ERROR 0x20
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#define UART_OVERRUN_ERROR 0x40
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#define UART_CTS 0x80
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enum pl2303_type {
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type_0, /* don't know the difference between type 0 and */
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type_1, /* type 1, until someone from prolific tells us... */
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HX, /* HX version of the pl2303 chip */
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};
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struct pl2303_serial_private {
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enum pl2303_type type;
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};
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struct pl2303_private {
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spinlock_t lock;
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u8 line_control;
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u8 line_status;
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};
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static int pl2303_vendor_read(__u16 value, __u16 index,
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struct usb_serial *serial, unsigned char *buf)
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{
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int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
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VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
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value, index, buf, 1, 100);
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dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n",
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VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
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res, buf[0]);
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return res;
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}
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static int pl2303_vendor_write(__u16 value, __u16 index,
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struct usb_serial *serial)
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{
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int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
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value, index, NULL, 0, 100);
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dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n",
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VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
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res);
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return res;
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}
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static int pl2303_startup(struct usb_serial *serial)
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{
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struct pl2303_serial_private *spriv;
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enum pl2303_type type = type_0;
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unsigned char *buf;
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spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
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if (!spriv)
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return -ENOMEM;
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buf = kmalloc(10, GFP_KERNEL);
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if (!buf) {
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kfree(spriv);
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return -ENOMEM;
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}
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if (serial->dev->descriptor.bDeviceClass == 0x02)
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type = type_0;
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else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
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type = HX;
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else if (serial->dev->descriptor.bDeviceClass == 0x00)
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type = type_1;
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else if (serial->dev->descriptor.bDeviceClass == 0xFF)
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type = type_1;
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dev_dbg(&serial->interface->dev, "device type: %d\n", type);
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spriv->type = type;
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usb_set_serial_data(serial, spriv);
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pl2303_vendor_read(0x8484, 0, serial, buf);
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pl2303_vendor_write(0x0404, 0, serial);
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pl2303_vendor_read(0x8484, 0, serial, buf);
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pl2303_vendor_read(0x8383, 0, serial, buf);
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pl2303_vendor_read(0x8484, 0, serial, buf);
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pl2303_vendor_write(0x0404, 1, serial);
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pl2303_vendor_read(0x8484, 0, serial, buf);
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pl2303_vendor_read(0x8383, 0, serial, buf);
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pl2303_vendor_write(0, 1, serial);
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pl2303_vendor_write(1, 0, serial);
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if (type == HX)
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pl2303_vendor_write(2, 0x44, serial);
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else
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pl2303_vendor_write(2, 0x24, serial);
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kfree(buf);
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return 0;
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}
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static void pl2303_release(struct usb_serial *serial)
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{
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struct pl2303_serial_private *spriv;
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spriv = usb_get_serial_data(serial);
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kfree(spriv);
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}
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static int pl2303_port_probe(struct usb_serial_port *port)
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{
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struct pl2303_private *priv;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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spin_lock_init(&priv->lock);
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usb_set_serial_port_data(port, priv);
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return 0;
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}
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static int pl2303_port_remove(struct usb_serial_port *port)
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{
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struct pl2303_private *priv;
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priv = usb_get_serial_port_data(port);
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kfree(priv);
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return 0;
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}
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static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
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{
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struct usb_device *dev = port->serial->dev;
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int retval;
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retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
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value, 0, NULL, 0, 100);
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dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
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value, retval);
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return retval;
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}
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static void pl2303_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port, struct ktermios *old_termios)
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{
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struct usb_serial *serial = port->serial;
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struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
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struct pl2303_private *priv = usb_get_serial_port_data(port);
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unsigned long flags;
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unsigned int cflag;
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unsigned char *buf;
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int baud;
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int i;
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u8 control;
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const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
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4800, 7200, 9600, 14400, 19200, 28800, 38400,
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57600, 115200, 230400, 460800, 614400,
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921600, 1228800, 2457600, 3000000, 6000000 };
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int baud_floor, baud_ceil;
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int k;
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/* The PL2303 is reported to lose bytes if you change
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serial settings even to the same values as before. Thus
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we actually need to filter in this specific case */
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if (!tty_termios_hw_change(&tty->termios, old_termios))
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return;
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cflag = tty->termios.c_cflag;
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buf = kzalloc(7, GFP_KERNEL);
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if (!buf) {
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dev_err(&port->dev, "%s - out of memory.\n", __func__);
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/* Report back no change occurred */
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tty->termios = *old_termios;
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return;
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}
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i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
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GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
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0, 0, buf, 7, 100);
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dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x\n", i,
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buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
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if (cflag & CSIZE) {
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switch (cflag & CSIZE) {
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case CS5:
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buf[6] = 5;
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break;
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case CS6:
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buf[6] = 6;
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break;
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case CS7:
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buf[6] = 7;
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break;
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default:
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case CS8:
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buf[6] = 8;
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break;
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}
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dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
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}
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/* For reference buf[0]:buf[3] baud rate value */
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/* NOTE: Only the values defined in baud_sup are supported !
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* => if unsupported values are set, the PL2303 seems to use
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* 9600 baud (at least my PL2303X always does)
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*/
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baud = tty_get_baud_rate(tty);
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dev_dbg(&port->dev, "baud requested = %d\n", baud);
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if (baud) {
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/* Set baudrate to nearest supported value */
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for (k=0; k<ARRAY_SIZE(baud_sup); k++) {
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if (baud_sup[k] / baud) {
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baud_ceil = baud_sup[k];
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if (k==0) {
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baud = baud_ceil;
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} else {
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baud_floor = baud_sup[k-1];
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if ((baud_ceil % baud)
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> (baud % baud_floor))
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baud = baud_floor;
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else
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baud = baud_ceil;
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}
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break;
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}
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}
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if (baud > 1228800) {
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/* type_0, type_1 only support up to 1228800 baud */
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if (spriv->type != HX)
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baud = 1228800;
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else if (baud > 6000000)
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baud = 6000000;
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}
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dev_dbg(&port->dev, "baud set = %d\n", baud);
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if (baud <= 115200) {
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buf[0] = baud & 0xff;
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buf[1] = (baud >> 8) & 0xff;
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buf[2] = (baud >> 16) & 0xff;
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buf[3] = (baud >> 24) & 0xff;
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} else {
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/* apparently the formula for higher speeds is:
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* baudrate = 12M * 32 / (2^buf[1]) / buf[0]
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*/
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unsigned tmp = 12*1000*1000*32 / baud;
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buf[3] = 0x80;
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buf[2] = 0;
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buf[1] = (tmp >= 256);
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while (tmp >= 256) {
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tmp >>= 2;
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buf[1] <<= 1;
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}
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buf[0] = tmp;
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}
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}
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/* For reference buf[4]=0 is 1 stop bits */
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/* For reference buf[4]=1 is 1.5 stop bits */
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/* For reference buf[4]=2 is 2 stop bits */
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if (cflag & CSTOPB) {
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/* NOTE: Comply with "real" UARTs / RS232:
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* use 1.5 instead of 2 stop bits with 5 data bits
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*/
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if ((cflag & CSIZE) == CS5) {
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buf[4] = 1;
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dev_dbg(&port->dev, "stop bits = 1.5\n");
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} else {
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buf[4] = 2;
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dev_dbg(&port->dev, "stop bits = 2\n");
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}
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} else {
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buf[4] = 0;
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dev_dbg(&port->dev, "stop bits = 1\n");
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}
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if (cflag & PARENB) {
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/* For reference buf[5]=0 is none parity */
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/* For reference buf[5]=1 is odd parity */
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/* For reference buf[5]=2 is even parity */
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/* For reference buf[5]=3 is mark parity */
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/* For reference buf[5]=4 is space parity */
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if (cflag & PARODD) {
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if (cflag & CMSPAR) {
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buf[5] = 3;
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dev_dbg(&port->dev, "parity = mark\n");
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} else {
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buf[5] = 1;
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dev_dbg(&port->dev, "parity = odd\n");
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}
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} else {
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if (cflag & CMSPAR) {
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buf[5] = 4;
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dev_dbg(&port->dev, "parity = space\n");
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} else {
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buf[5] = 2;
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dev_dbg(&port->dev, "parity = even\n");
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}
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}
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} else {
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buf[5] = 0;
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dev_dbg(&port->dev, "parity = none\n");
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}
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i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
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0, 0, buf, 7, 100);
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dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i);
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/* change control lines if we are switching to or from B0 */
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spin_lock_irqsave(&priv->lock, flags);
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control = priv->line_control;
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if ((cflag & CBAUD) == B0)
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priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
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else if ((old_termios->c_cflag & CBAUD) == B0)
|
|
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
|
|
if (control != priv->line_control) {
|
|
control = priv->line_control;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
pl2303_set_control_lines(port, control);
|
|
} else {
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
|
|
|
|
i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
|
|
GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
|
|
0, 0, buf, 7, 100);
|
|
dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x\n", i,
|
|
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
|
|
|
|
if (cflag & CRTSCTS) {
|
|
if (spriv->type == HX)
|
|
pl2303_vendor_write(0x0, 0x61, serial);
|
|
else
|
|
pl2303_vendor_write(0x0, 0x41, serial);
|
|
} else {
|
|
pl2303_vendor_write(0x0, 0x0, serial);
|
|
}
|
|
|
|
/* Save resulting baud rate */
|
|
if (baud)
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
|
|
kfree(buf);
|
|
}
|
|
|
|
static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
|
|
{
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
u8 control;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
/* Change DTR and RTS */
|
|
if (on)
|
|
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
|
|
else
|
|
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
|
|
control = priv->line_control;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
pl2303_set_control_lines(port, control);
|
|
}
|
|
|
|
static void pl2303_close(struct usb_serial_port *port)
|
|
{
|
|
usb_serial_generic_close(port);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
}
|
|
|
|
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
struct ktermios tmp_termios;
|
|
struct usb_serial *serial = port->serial;
|
|
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
|
|
int result;
|
|
|
|
if (spriv->type != HX) {
|
|
usb_clear_halt(serial->dev, port->write_urb->pipe);
|
|
usb_clear_halt(serial->dev, port->read_urb->pipe);
|
|
} else {
|
|
/* reset upstream data pipes */
|
|
pl2303_vendor_write(8, 0, serial);
|
|
pl2303_vendor_write(9, 0, serial);
|
|
}
|
|
|
|
/* Setup termios */
|
|
if (tty)
|
|
pl2303_set_termios(tty, port, &tmp_termios);
|
|
|
|
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
|
if (result) {
|
|
dev_err(&port->dev, "%s - failed submitting interrupt urb,"
|
|
" error %d\n", __func__, result);
|
|
return result;
|
|
}
|
|
|
|
result = usb_serial_generic_open(tty, port);
|
|
if (result) {
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
return result;
|
|
}
|
|
|
|
port->port.drain_delay = 256;
|
|
return 0;
|
|
}
|
|
|
|
static int pl2303_tiocmset(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
u8 control;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
if (set & TIOCM_RTS)
|
|
priv->line_control |= CONTROL_RTS;
|
|
if (set & TIOCM_DTR)
|
|
priv->line_control |= CONTROL_DTR;
|
|
if (clear & TIOCM_RTS)
|
|
priv->line_control &= ~CONTROL_RTS;
|
|
if (clear & TIOCM_DTR)
|
|
priv->line_control &= ~CONTROL_DTR;
|
|
control = priv->line_control;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
ret = pl2303_set_control_lines(port, control);
|
|
if (ret)
|
|
return usb_translate_errors(ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pl2303_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
unsigned int mcr;
|
|
unsigned int status;
|
|
unsigned int result;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
mcr = priv->line_control;
|
|
status = priv->line_status;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
|
|
| ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
|
|
| ((status & UART_CTS) ? TIOCM_CTS : 0)
|
|
| ((status & UART_DSR) ? TIOCM_DSR : 0)
|
|
| ((status & UART_RING) ? TIOCM_RI : 0)
|
|
| ((status & UART_DCD) ? TIOCM_CD : 0);
|
|
|
|
dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int pl2303_carrier_raised(struct usb_serial_port *port)
|
|
{
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
if (priv->line_status & UART_DCD)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
unsigned int prevstatus;
|
|
unsigned int status;
|
|
unsigned int changed;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
prevstatus = priv->line_status;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
while (1) {
|
|
interruptible_sleep_on(&port->port.delta_msr_wait);
|
|
/* see if a signal did it */
|
|
if (signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
|
|
if (port->serial->disconnected)
|
|
return -EIO;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
status = priv->line_status;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
changed = prevstatus ^ status;
|
|
|
|
if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
|
|
((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
|
|
((arg & TIOCM_CD) && (changed & UART_DCD)) ||
|
|
((arg & TIOCM_CTS) && (changed & UART_CTS))) {
|
|
return 0;
|
|
}
|
|
prevstatus = status;
|
|
}
|
|
/* NOTREACHED */
|
|
return 0;
|
|
}
|
|
|
|
static int pl2303_ioctl(struct tty_struct *tty,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct serial_struct ser;
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
|
|
|
|
switch (cmd) {
|
|
case TIOCGSERIAL:
|
|
memset(&ser, 0, sizeof ser);
|
|
ser.type = PORT_16654;
|
|
ser.line = port->serial->minor;
|
|
ser.port = port->number;
|
|
ser.baud_base = 460800;
|
|
|
|
if (copy_to_user((void __user *)arg, &ser, sizeof ser))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
default:
|
|
dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
|
|
break;
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct usb_serial *serial = port->serial;
|
|
u16 state;
|
|
int result;
|
|
|
|
if (break_state == 0)
|
|
state = BREAK_OFF;
|
|
else
|
|
state = BREAK_ON;
|
|
dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
|
|
state == BREAK_OFF ? "off" : "on");
|
|
|
|
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
|
BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
|
|
0, NULL, 0, 100);
|
|
if (result)
|
|
dev_err(&port->dev, "error sending break = %d\n", result);
|
|
}
|
|
|
|
static void pl2303_update_line_status(struct usb_serial_port *port,
|
|
unsigned char *data,
|
|
unsigned int actual_length)
|
|
{
|
|
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
struct tty_struct *tty;
|
|
unsigned long flags;
|
|
u8 status_idx = UART_STATE;
|
|
u8 length = UART_STATE + 1;
|
|
u8 prev_line_status;
|
|
u16 idv, idp;
|
|
|
|
idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
|
|
idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
|
|
|
|
|
|
if (idv == SIEMENS_VENDOR_ID) {
|
|
if (idp == SIEMENS_PRODUCT_ID_X65 ||
|
|
idp == SIEMENS_PRODUCT_ID_SX1 ||
|
|
idp == SIEMENS_PRODUCT_ID_X75) {
|
|
|
|
length = 1;
|
|
status_idx = 0;
|
|
}
|
|
}
|
|
|
|
if (actual_length < length)
|
|
return;
|
|
|
|
/* Save off the uart status for others to look at */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
prev_line_status = priv->line_status;
|
|
priv->line_status = data[status_idx];
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
if (priv->line_status & UART_BREAK_ERROR)
|
|
usb_serial_handle_break(port);
|
|
wake_up_interruptible(&port->port.delta_msr_wait);
|
|
|
|
tty = tty_port_tty_get(&port->port);
|
|
if (!tty)
|
|
return;
|
|
if ((priv->line_status ^ prev_line_status) & UART_DCD)
|
|
usb_serial_handle_dcd_change(port, tty,
|
|
priv->line_status & UART_DCD);
|
|
tty_kref_put(tty);
|
|
}
|
|
|
|
static void pl2303_read_int_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
unsigned int actual_length = urb->actual_length;
|
|
int status = urb->status;
|
|
int retval;
|
|
|
|
switch (status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
|
|
__func__, status);
|
|
return;
|
|
default:
|
|
dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
|
|
__func__, status);
|
|
goto exit;
|
|
}
|
|
|
|
usb_serial_debug_data(&port->dev, __func__,
|
|
urb->actual_length, urb->transfer_buffer);
|
|
|
|
pl2303_update_line_status(port, data, actual_length);
|
|
|
|
exit:
|
|
retval = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (retval)
|
|
dev_err(&port->dev,
|
|
"%s - usb_submit_urb failed with result %d\n",
|
|
__func__, retval);
|
|
}
|
|
|
|
static void pl2303_process_read_urb(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned char *data = urb->transfer_buffer;
|
|
char tty_flag = TTY_NORMAL;
|
|
unsigned long flags;
|
|
u8 line_status;
|
|
int i;
|
|
|
|
/* update line status */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
line_status = priv->line_status;
|
|
priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
wake_up_interruptible(&port->port.delta_msr_wait);
|
|
|
|
if (!urb->actual_length)
|
|
return;
|
|
|
|
/* break takes precedence over parity, */
|
|
/* which takes precedence over framing errors */
|
|
if (line_status & UART_BREAK_ERROR)
|
|
tty_flag = TTY_BREAK;
|
|
else if (line_status & UART_PARITY_ERROR)
|
|
tty_flag = TTY_PARITY;
|
|
else if (line_status & UART_FRAME_ERROR)
|
|
tty_flag = TTY_FRAME;
|
|
dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag);
|
|
|
|
/* overrun is special, not associated with a char */
|
|
if (line_status & UART_OVERRUN_ERROR)
|
|
tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
|
|
|
|
if (port->port.console && port->sysrq) {
|
|
for (i = 0; i < urb->actual_length; ++i)
|
|
if (!usb_serial_handle_sysrq_char(port, data[i]))
|
|
tty_insert_flip_char(&port->port, data[i],
|
|
tty_flag);
|
|
} else {
|
|
tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
|
|
urb->actual_length);
|
|
}
|
|
|
|
tty_flip_buffer_push(&port->port);
|
|
}
|
|
|
|
/* All of the device info needed for the PL2303 SIO serial converter */
|
|
static struct usb_serial_driver pl2303_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "pl2303",
|
|
},
|
|
.id_table = id_table,
|
|
.num_ports = 1,
|
|
.bulk_in_size = 256,
|
|
.bulk_out_size = 256,
|
|
.open = pl2303_open,
|
|
.close = pl2303_close,
|
|
.dtr_rts = pl2303_dtr_rts,
|
|
.carrier_raised = pl2303_carrier_raised,
|
|
.ioctl = pl2303_ioctl,
|
|
.break_ctl = pl2303_break_ctl,
|
|
.set_termios = pl2303_set_termios,
|
|
.tiocmget = pl2303_tiocmget,
|
|
.tiocmset = pl2303_tiocmset,
|
|
.tiocmiwait = pl2303_tiocmiwait,
|
|
.process_read_urb = pl2303_process_read_urb,
|
|
.read_int_callback = pl2303_read_int_callback,
|
|
.attach = pl2303_startup,
|
|
.release = pl2303_release,
|
|
.port_probe = pl2303_port_probe,
|
|
.port_remove = pl2303_port_remove,
|
|
};
|
|
|
|
static struct usb_serial_driver * const serial_drivers[] = {
|
|
&pl2303_device, NULL
|
|
};
|
|
|
|
module_usb_serial_driver(serial_drivers, id_table);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|