1268 lines
33 KiB
C
1268 lines
33 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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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* See Documentation/usb/usb-serial.rst for more information on using this
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* driver
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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/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 <asm/unaligned.h>
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#include "pl2303.h"
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#define PL2303_QUIRK_UART_STATE_IDX0 BIT(0)
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#define PL2303_QUIRK_LEGACY BIT(1)
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#define PL2303_QUIRK_ENDPOINT_HACK BIT(2)
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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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.driver_info = PL2303_QUIRK_ENDPOINT_HACK },
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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_CHILITAG) },
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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(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ZTEK) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_TB) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GC) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GB) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GT) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GL) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GE) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GS) },
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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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.driver_info = PL2303_QUIRK_ENDPOINT_HACK },
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{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_UC485),
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.driver_info = PL2303_QUIRK_ENDPOINT_HACK },
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{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_UC232B),
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.driver_info = PL2303_QUIRK_ENDPOINT_HACK },
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{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID2) },
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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(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1),
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.driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
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{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65),
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.driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
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{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75),
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.driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
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{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81),
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.driver_info = PL2303_QUIRK_ENDPOINT_HACK },
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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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.driver_info = PL2303_QUIRK_ENDPOINT_HACK },
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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(HP_VENDOR_ID, HP_LD220TA_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LD381_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LD381GC_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LD960TA_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LM920_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LM930_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_LM940_PRODUCT_ID) },
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{ USB_DEVICE(HP_VENDOR_ID, HP_TD620_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(ADLINK_VENDOR_ID, ADLINK_ND6530GC_PRODUCT_ID) },
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{ USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
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{ USB_DEVICE(AT_VENDOR_ID, AT_VTKIT3_PRODUCT_ID) },
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{ USB_DEVICE(IBM_VENDOR_ID, IBM_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_WRITE_NREQUEST 0x80
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#define VENDOR_READ_REQUEST_TYPE 0xc0
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#define VENDOR_READ_REQUEST 0x01
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#define VENDOR_READ_NREQUEST 0x81
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#define UART_STATE_INDEX 8
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#define UART_STATE_MSR_MASK 0x8b
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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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#define PL2303_FLOWCTRL_MASK 0xf0
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#define PL2303_READ_TYPE_HX_STATUS 0x8080
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#define PL2303_HXN_RESET_REG 0x07
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#define PL2303_HXN_RESET_UPSTREAM_PIPE 0x02
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#define PL2303_HXN_RESET_DOWNSTREAM_PIPE 0x01
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#define PL2303_HXN_FLOWCTRL_REG 0x0a
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#define PL2303_HXN_FLOWCTRL_MASK 0x1c
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#define PL2303_HXN_FLOWCTRL_NONE 0x1c
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#define PL2303_HXN_FLOWCTRL_RTS_CTS 0x18
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#define PL2303_HXN_FLOWCTRL_XON_XOFF 0x0c
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static void pl2303_set_break(struct usb_serial_port *port, bool enable);
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enum pl2303_type {
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TYPE_H,
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TYPE_HX,
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TYPE_TA,
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TYPE_TB,
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TYPE_HXD,
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TYPE_HXN,
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TYPE_COUNT
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};
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struct pl2303_type_data {
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const char *name;
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speed_t max_baud_rate;
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unsigned long quirks;
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unsigned int no_autoxonxoff:1;
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unsigned int no_divisors:1;
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unsigned int alt_divisors:1;
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};
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struct pl2303_serial_private {
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const struct pl2303_type_data *type;
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unsigned long quirks;
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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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u8 line_settings[7];
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};
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static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = {
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[TYPE_H] = {
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.name = "H",
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.max_baud_rate = 1228800,
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.quirks = PL2303_QUIRK_LEGACY,
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.no_autoxonxoff = true,
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},
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[TYPE_HX] = {
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.name = "HX",
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.max_baud_rate = 6000000,
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},
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[TYPE_TA] = {
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.name = "TA",
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.max_baud_rate = 6000000,
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.alt_divisors = true,
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},
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[TYPE_TB] = {
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.name = "TB",
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.max_baud_rate = 12000000,
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.alt_divisors = true,
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},
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[TYPE_HXD] = {
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.name = "HXD",
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.max_baud_rate = 12000000,
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},
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[TYPE_HXN] = {
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.name = "G",
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.max_baud_rate = 12000000,
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.no_divisors = true,
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},
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};
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static int pl2303_vendor_read(struct usb_serial *serial, u16 value,
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unsigned char buf[1])
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{
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struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
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struct device *dev = &serial->interface->dev;
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u8 request;
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int res;
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if (spriv->type == &pl2303_type_data[TYPE_HXN])
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request = VENDOR_READ_NREQUEST;
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else
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request = VENDOR_READ_REQUEST;
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res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
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request, VENDOR_READ_REQUEST_TYPE,
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value, 0, buf, 1, 100);
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if (res != 1) {
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dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__,
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value, res);
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if (res >= 0)
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res = -EIO;
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return res;
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}
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dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]);
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return 0;
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}
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static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)
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{
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struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
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struct device *dev = &serial->interface->dev;
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u8 request;
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int res;
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dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index);
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if (spriv->type == &pl2303_type_data[TYPE_HXN])
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request = VENDOR_WRITE_NREQUEST;
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else
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request = VENDOR_WRITE_REQUEST;
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res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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request, VENDOR_WRITE_REQUEST_TYPE,
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value, index, NULL, 0, 100);
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if (res) {
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dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__,
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value, res);
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return res;
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}
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return 0;
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}
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static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val)
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{
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struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
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int ret = 0;
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u8 *buf;
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buf = kmalloc(1, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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if (spriv->type == &pl2303_type_data[TYPE_HXN])
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ret = pl2303_vendor_read(serial, reg, buf);
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else
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ret = pl2303_vendor_read(serial, reg | 0x80, buf);
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if (ret)
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goto out_free;
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*buf &= ~mask;
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*buf |= val & mask;
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ret = pl2303_vendor_write(serial, reg, *buf);
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out_free:
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kfree(buf);
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return ret;
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}
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static int pl2303_probe(struct usb_serial *serial,
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const struct usb_device_id *id)
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{
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usb_set_serial_data(serial, (void *)id->driver_info);
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return 0;
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}
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/*
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* Use interrupt endpoint from first interface if available.
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*
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* This is needed due to the looney way its endpoints are set up.
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*/
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static int pl2303_endpoint_hack(struct usb_serial *serial,
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struct usb_serial_endpoints *epds)
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{
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struct usb_interface *interface = serial->interface;
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struct usb_device *dev = serial->dev;
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struct device *ddev = &interface->dev;
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struct usb_host_interface *iface_desc;
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struct usb_endpoint_descriptor *endpoint;
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unsigned int i;
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if (interface == dev->actconfig->interface[0])
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return 0;
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/* check out the endpoints of the other interface */
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iface_desc = dev->actconfig->interface[0]->cur_altsetting;
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for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
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endpoint = &iface_desc->endpoint[i].desc;
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if (!usb_endpoint_is_int_in(endpoint))
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continue;
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dev_dbg(ddev, "found interrupt in on separate interface\n");
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if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in))
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epds->interrupt_in[epds->num_interrupt_in++] = endpoint;
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}
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return 0;
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}
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static int pl2303_calc_num_ports(struct usb_serial *serial,
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struct usb_serial_endpoints *epds)
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{
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unsigned long quirks = (unsigned long)usb_get_serial_data(serial);
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struct device *dev = &serial->interface->dev;
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int ret;
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if (quirks & PL2303_QUIRK_ENDPOINT_HACK) {
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ret = pl2303_endpoint_hack(serial, epds);
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if (ret)
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return ret;
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}
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if (epds->num_interrupt_in < 1) {
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dev_err(dev, "required interrupt-in endpoint missing\n");
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return -ENODEV;
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}
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return 1;
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}
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static bool pl2303_supports_hx_status(struct usb_serial *serial)
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{
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int ret;
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u8 buf;
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ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST,
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VENDOR_READ_REQUEST_TYPE, PL2303_READ_TYPE_HX_STATUS,
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0, &buf, 1, 100, GFP_KERNEL);
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return ret == 0;
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}
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static int pl2303_detect_type(struct usb_serial *serial)
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{
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struct usb_device_descriptor *desc = &serial->dev->descriptor;
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u16 bcdDevice, bcdUSB;
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/*
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* Legacy PL2303H, variants 0 and 1 (difference unknown).
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*/
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if (desc->bDeviceClass == 0x02)
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return TYPE_H; /* variant 0 */
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if (desc->bMaxPacketSize0 != 0x40) {
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if (desc->bDeviceClass == 0x00 || desc->bDeviceClass == 0xff)
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return TYPE_H; /* variant 1 */
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return TYPE_H; /* variant 0 */
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}
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bcdDevice = le16_to_cpu(desc->bcdDevice);
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bcdUSB = le16_to_cpu(desc->bcdUSB);
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switch (bcdUSB) {
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case 0x101:
|
|
/* USB 1.0.1? Let's assume they meant 1.1... */
|
|
fallthrough;
|
|
case 0x110:
|
|
switch (bcdDevice) {
|
|
case 0x300:
|
|
return TYPE_HX;
|
|
case 0x400:
|
|
return TYPE_HXD;
|
|
default:
|
|
return TYPE_HX;
|
|
}
|
|
break;
|
|
case 0x200:
|
|
switch (bcdDevice) {
|
|
case 0x100: /* GC */
|
|
case 0x105:
|
|
return TYPE_HXN;
|
|
case 0x300: /* GT / TA */
|
|
if (pl2303_supports_hx_status(serial))
|
|
return TYPE_TA;
|
|
fallthrough;
|
|
case 0x305:
|
|
case 0x400: /* GL */
|
|
case 0x405:
|
|
return TYPE_HXN;
|
|
case 0x500: /* GE / TB */
|
|
if (pl2303_supports_hx_status(serial))
|
|
return TYPE_TB;
|
|
fallthrough;
|
|
case 0x505:
|
|
case 0x600: /* GS */
|
|
case 0x605:
|
|
case 0x700: /* GR */
|
|
case 0x705:
|
|
return TYPE_HXN;
|
|
}
|
|
break;
|
|
}
|
|
|
|
dev_err(&serial->interface->dev,
|
|
"unknown device type, please report to linux-usb@vger.kernel.org\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int pl2303_startup(struct usb_serial *serial)
|
|
{
|
|
struct pl2303_serial_private *spriv;
|
|
enum pl2303_type type;
|
|
unsigned char *buf;
|
|
int ret;
|
|
|
|
ret = pl2303_detect_type(serial);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
type = ret;
|
|
dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name);
|
|
|
|
spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
|
|
if (!spriv)
|
|
return -ENOMEM;
|
|
|
|
spriv->type = &pl2303_type_data[type];
|
|
spriv->quirks = (unsigned long)usb_get_serial_data(serial);
|
|
spriv->quirks |= spriv->type->quirks;
|
|
|
|
usb_set_serial_data(serial, spriv);
|
|
|
|
if (type != TYPE_HXN) {
|
|
buf = kmalloc(1, GFP_KERNEL);
|
|
if (!buf) {
|
|
kfree(spriv);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
pl2303_vendor_read(serial, 0x8484, buf);
|
|
pl2303_vendor_write(serial, 0x0404, 0);
|
|
pl2303_vendor_read(serial, 0x8484, buf);
|
|
pl2303_vendor_read(serial, 0x8383, buf);
|
|
pl2303_vendor_read(serial, 0x8484, buf);
|
|
pl2303_vendor_write(serial, 0x0404, 1);
|
|
pl2303_vendor_read(serial, 0x8484, buf);
|
|
pl2303_vendor_read(serial, 0x8383, buf);
|
|
pl2303_vendor_write(serial, 0, 1);
|
|
pl2303_vendor_write(serial, 1, 0);
|
|
if (spriv->quirks & PL2303_QUIRK_LEGACY)
|
|
pl2303_vendor_write(serial, 2, 0x24);
|
|
else
|
|
pl2303_vendor_write(serial, 2, 0x44);
|
|
|
|
kfree(buf);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pl2303_release(struct usb_serial *serial)
|
|
{
|
|
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
|
|
|
|
kfree(spriv);
|
|
}
|
|
|
|
static int pl2303_port_probe(struct usb_serial_port *port)
|
|
{
|
|
struct pl2303_private *priv;
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&priv->lock);
|
|
|
|
usb_set_serial_port_data(port, priv);
|
|
|
|
port->port.drain_delay = 256;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pl2303_port_remove(struct usb_serial_port *port)
|
|
{
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
|
|
kfree(priv);
|
|
}
|
|
|
|
static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
|
|
{
|
|
struct usb_device *dev = port->serial->dev;
|
|
int retval;
|
|
|
|
dev_dbg(&port->dev, "%s - %02x\n", __func__, value);
|
|
|
|
retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
|
SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
|
|
value, 0, NULL, 0, 100);
|
|
if (retval)
|
|
dev_err(&port->dev, "%s - failed: %d\n", __func__, retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* Returns the nearest supported baud rate that can be set directly without
|
|
* using divisors.
|
|
*/
|
|
static speed_t pl2303_get_supported_baud_rate(speed_t baud)
|
|
{
|
|
static const speed_t baud_sup[] = {
|
|
75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600,
|
|
14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800,
|
|
614400, 921600, 1228800, 2457600, 3000000, 6000000
|
|
};
|
|
|
|
unsigned i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
|
|
if (baud_sup[i] > baud)
|
|
break;
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(baud_sup))
|
|
baud = baud_sup[i - 1];
|
|
else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
|
|
baud = baud_sup[i - 1];
|
|
else
|
|
baud = baud_sup[i];
|
|
|
|
return baud;
|
|
}
|
|
|
|
/*
|
|
* NOTE: If unsupported baud rates are set directly, the PL2303 seems to
|
|
* use 9600 baud.
|
|
*/
|
|
static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4],
|
|
speed_t baud)
|
|
{
|
|
put_unaligned_le32(baud, buf);
|
|
|
|
return baud;
|
|
}
|
|
|
|
static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4],
|
|
speed_t baud)
|
|
{
|
|
unsigned int baseline, mantissa, exponent;
|
|
|
|
/*
|
|
* Apparently the formula is:
|
|
* baudrate = 12M * 32 / (mantissa * 4^exponent)
|
|
* where
|
|
* mantissa = buf[8:0]
|
|
* exponent = buf[11:9]
|
|
*/
|
|
baseline = 12000000 * 32;
|
|
mantissa = baseline / baud;
|
|
if (mantissa == 0)
|
|
mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */
|
|
exponent = 0;
|
|
while (mantissa >= 512) {
|
|
if (exponent < 7) {
|
|
mantissa >>= 2; /* divide by 4 */
|
|
exponent++;
|
|
} else {
|
|
/* Exponent is maxed. Trim mantissa and leave. */
|
|
mantissa = 511;
|
|
break;
|
|
}
|
|
}
|
|
|
|
buf[3] = 0x80;
|
|
buf[2] = 0;
|
|
buf[1] = exponent << 1 | mantissa >> 8;
|
|
buf[0] = mantissa & 0xff;
|
|
|
|
/* Calculate and return the exact baud rate. */
|
|
baud = (baseline / mantissa) >> (exponent << 1);
|
|
|
|
return baud;
|
|
}
|
|
|
|
static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4],
|
|
speed_t baud)
|
|
{
|
|
unsigned int baseline, mantissa, exponent;
|
|
|
|
/*
|
|
* Apparently, for the TA version the formula is:
|
|
* baudrate = 12M * 32 / (mantissa * 2^exponent)
|
|
* where
|
|
* mantissa = buf[10:0]
|
|
* exponent = buf[15:13 16]
|
|
*/
|
|
baseline = 12000000 * 32;
|
|
mantissa = baseline / baud;
|
|
if (mantissa == 0)
|
|
mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */
|
|
exponent = 0;
|
|
while (mantissa >= 2048) {
|
|
if (exponent < 15) {
|
|
mantissa >>= 1; /* divide by 2 */
|
|
exponent++;
|
|
} else {
|
|
/* Exponent is maxed. Trim mantissa and leave. */
|
|
mantissa = 2047;
|
|
break;
|
|
}
|
|
}
|
|
|
|
buf[3] = 0x80;
|
|
buf[2] = exponent & 0x01;
|
|
buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8;
|
|
buf[0] = mantissa & 0xff;
|
|
|
|
/* Calculate and return the exact baud rate. */
|
|
baud = (baseline / mantissa) >> exponent;
|
|
|
|
return baud;
|
|
}
|
|
|
|
static void pl2303_encode_baud_rate(struct tty_struct *tty,
|
|
struct usb_serial_port *port,
|
|
u8 buf[4])
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
|
|
speed_t baud_sup;
|
|
speed_t baud;
|
|
|
|
baud = tty_get_baud_rate(tty);
|
|
dev_dbg(&port->dev, "baud requested = %u\n", baud);
|
|
if (!baud)
|
|
return;
|
|
|
|
if (spriv->type->max_baud_rate)
|
|
baud = min_t(speed_t, baud, spriv->type->max_baud_rate);
|
|
/*
|
|
* Use direct method for supported baud rates, otherwise use divisors.
|
|
* Newer chip types do not support divisor encoding.
|
|
*/
|
|
if (spriv->type->no_divisors)
|
|
baud_sup = baud;
|
|
else
|
|
baud_sup = pl2303_get_supported_baud_rate(baud);
|
|
|
|
if (baud == baud_sup)
|
|
baud = pl2303_encode_baud_rate_direct(buf, baud);
|
|
else if (spriv->type->alt_divisors)
|
|
baud = pl2303_encode_baud_rate_divisor_alt(buf, baud);
|
|
else
|
|
baud = pl2303_encode_baud_rate_divisor(buf, baud);
|
|
|
|
/* Save resulting baud rate */
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
dev_dbg(&port->dev, "baud set = %u\n", baud);
|
|
}
|
|
|
|
static int pl2303_get_line_request(struct usb_serial_port *port,
|
|
unsigned char buf[7])
|
|
{
|
|
struct usb_device *udev = port->serial->dev;
|
|
int ret;
|
|
|
|
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
|
|
GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
|
|
0, 0, buf, 7, 100);
|
|
if (ret != 7) {
|
|
dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
|
|
|
|
if (ret >= 0)
|
|
ret = -EIO;
|
|
|
|
return ret;
|
|
}
|
|
|
|
dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pl2303_set_line_request(struct usb_serial_port *port,
|
|
unsigned char buf[7])
|
|
{
|
|
struct usb_device *udev = port->serial->dev;
|
|
int ret;
|
|
|
|
ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
|
|
SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
|
|
0, 0, buf, 7, 100);
|
|
if (ret < 0) {
|
|
dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b)
|
|
{
|
|
bool ixon_change;
|
|
|
|
ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) ||
|
|
a->c_cc[VSTART] != b->c_cc[VSTART] ||
|
|
a->c_cc[VSTOP] != b->c_cc[VSTOP];
|
|
|
|
return tty_termios_hw_change(a, b) || ixon_change;
|
|
}
|
|
|
|
static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type)
|
|
{
|
|
if (!I_IXON(tty) || I_IXANY(tty))
|
|
return false;
|
|
|
|
if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13)
|
|
return false;
|
|
|
|
if (type->no_autoxonxoff)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void pl2303_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port, struct ktermios *old_termios)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
unsigned char *buf;
|
|
int ret;
|
|
u8 control;
|
|
|
|
if (old_termios && !pl2303_termios_change(&tty->termios, old_termios))
|
|
return;
|
|
|
|
buf = kzalloc(7, GFP_KERNEL);
|
|
if (!buf) {
|
|
/* Report back no change occurred */
|
|
if (old_termios)
|
|
tty->termios = *old_termios;
|
|
return;
|
|
}
|
|
|
|
pl2303_get_line_request(port, buf);
|
|
|
|
buf[6] = tty_get_char_size(tty->termios.c_cflag);
|
|
dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
|
|
|
|
/* For reference buf[0]:buf[3] baud rate value */
|
|
pl2303_encode_baud_rate(tty, port, &buf[0]);
|
|
|
|
/* For reference buf[4]=0 is 1 stop bits */
|
|
/* For reference buf[4]=1 is 1.5 stop bits */
|
|
/* For reference buf[4]=2 is 2 stop bits */
|
|
if (C_CSTOPB(tty)) {
|
|
/*
|
|
* NOTE: Comply with "real" UARTs / RS232:
|
|
* use 1.5 instead of 2 stop bits with 5 data bits
|
|
*/
|
|
if (C_CSIZE(tty) == CS5) {
|
|
buf[4] = 1;
|
|
dev_dbg(&port->dev, "stop bits = 1.5\n");
|
|
} else {
|
|
buf[4] = 2;
|
|
dev_dbg(&port->dev, "stop bits = 2\n");
|
|
}
|
|
} else {
|
|
buf[4] = 0;
|
|
dev_dbg(&port->dev, "stop bits = 1\n");
|
|
}
|
|
|
|
if (C_PARENB(tty)) {
|
|
/* For reference buf[5]=0 is none parity */
|
|
/* For reference buf[5]=1 is odd parity */
|
|
/* For reference buf[5]=2 is even parity */
|
|
/* For reference buf[5]=3 is mark parity */
|
|
/* For reference buf[5]=4 is space parity */
|
|
if (C_PARODD(tty)) {
|
|
if (C_CMSPAR(tty)) {
|
|
buf[5] = 3;
|
|
dev_dbg(&port->dev, "parity = mark\n");
|
|
} else {
|
|
buf[5] = 1;
|
|
dev_dbg(&port->dev, "parity = odd\n");
|
|
}
|
|
} else {
|
|
if (C_CMSPAR(tty)) {
|
|
buf[5] = 4;
|
|
dev_dbg(&port->dev, "parity = space\n");
|
|
} else {
|
|
buf[5] = 2;
|
|
dev_dbg(&port->dev, "parity = even\n");
|
|
}
|
|
}
|
|
} else {
|
|
buf[5] = 0;
|
|
dev_dbg(&port->dev, "parity = none\n");
|
|
}
|
|
|
|
/*
|
|
* Some PL2303 are known to lose bytes if you change serial settings
|
|
* even to the same values as before. Thus we actually need to filter
|
|
* in this specific case.
|
|
*
|
|
* Note that the tty_termios_hw_change check above is not sufficient
|
|
* as a previously requested baud rate may differ from the one
|
|
* actually used (and stored in old_termios).
|
|
*
|
|
* NOTE: No additional locking needed for line_settings as it is
|
|
* only used in set_termios, which is serialised against itself.
|
|
*/
|
|
if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
|
|
ret = pl2303_set_line_request(port, buf);
|
|
if (!ret)
|
|
memcpy(priv->line_settings, buf, 7);
|
|
}
|
|
|
|
/* change control lines if we are switching to or from B0 */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control = priv->line_control;
|
|
if (C_BAUD(tty) == B0)
|
|
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
|
|
else if (old_termios && (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);
|
|
}
|
|
|
|
if (C_CRTSCTS(tty)) {
|
|
if (spriv->quirks & PL2303_QUIRK_LEGACY) {
|
|
pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40);
|
|
} else if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
|
|
pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
|
|
PL2303_HXN_FLOWCTRL_MASK,
|
|
PL2303_HXN_FLOWCTRL_RTS_CTS);
|
|
} else {
|
|
pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60);
|
|
}
|
|
} else if (pl2303_enable_xonxoff(tty, spriv->type)) {
|
|
if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
|
|
pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
|
|
PL2303_HXN_FLOWCTRL_MASK,
|
|
PL2303_HXN_FLOWCTRL_XON_XOFF);
|
|
} else {
|
|
pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0);
|
|
}
|
|
} else {
|
|
if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
|
|
pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
|
|
PL2303_HXN_FLOWCTRL_MASK,
|
|
PL2303_HXN_FLOWCTRL_NONE);
|
|
} else {
|
|
pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0);
|
|
}
|
|
}
|
|
|
|
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);
|
|
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);
|
|
pl2303_set_break(port, false);
|
|
}
|
|
|
|
static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
|
|
int result;
|
|
|
|
if (spriv->quirks & PL2303_QUIRK_LEGACY) {
|
|
usb_clear_halt(serial->dev, port->write_urb->pipe);
|
|
usb_clear_halt(serial->dev, port->read_urb->pipe);
|
|
} else {
|
|
/* reset upstream data pipes */
|
|
if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
|
|
pl2303_vendor_write(serial, PL2303_HXN_RESET_REG,
|
|
PL2303_HXN_RESET_UPSTREAM_PIPE |
|
|
PL2303_HXN_RESET_DOWNSTREAM_PIPE);
|
|
} else {
|
|
pl2303_vendor_write(serial, 8, 0);
|
|
pl2303_vendor_write(serial, 9, 0);
|
|
}
|
|
}
|
|
|
|
/* Setup termios */
|
|
if (tty)
|
|
pl2303_set_termios(tty, port, NULL);
|
|
|
|
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
|
if (result) {
|
|
dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
|
|
result);
|
|
return result;
|
|
}
|
|
|
|
result = usb_serial_generic_open(tty, port);
|
|
if (result) {
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
return result;
|
|
}
|
|
|
|
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 void pl2303_set_break(struct usb_serial_port *port, bool enable)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
u16 state;
|
|
int result;
|
|
|
|
if (enable)
|
|
state = BREAK_ON;
|
|
else
|
|
state = BREAK_OFF;
|
|
|
|
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_break_ctl(struct tty_struct *tty, int state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
pl2303_set_break(port, state);
|
|
}
|
|
|
|
static void pl2303_update_line_status(struct usb_serial_port *port,
|
|
unsigned char *data,
|
|
unsigned int actual_length)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
struct tty_struct *tty;
|
|
unsigned long flags;
|
|
unsigned int status_idx = UART_STATE_INDEX;
|
|
u8 status;
|
|
u8 delta;
|
|
|
|
if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0)
|
|
status_idx = 0;
|
|
|
|
if (actual_length < status_idx + 1)
|
|
return;
|
|
|
|
status = data[status_idx];
|
|
|
|
/* Save off the uart status for others to look at */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
delta = priv->line_status ^ status;
|
|
priv->line_status = status;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
if (status & UART_BREAK_ERROR)
|
|
usb_serial_handle_break(port);
|
|
|
|
if (delta & UART_STATE_MSR_MASK) {
|
|
if (delta & UART_CTS)
|
|
port->icount.cts++;
|
|
if (delta & UART_DSR)
|
|
port->icount.dsr++;
|
|
if (delta & UART_RING)
|
|
port->icount.rng++;
|
|
if (delta & UART_DCD) {
|
|
port->icount.dcd++;
|
|
tty = tty_port_tty_get(&port->port);
|
|
if (tty) {
|
|
usb_serial_handle_dcd_change(port, tty,
|
|
status & UART_DCD);
|
|
tty_kref_put(tty);
|
|
}
|
|
}
|
|
|
|
wake_up_interruptible(&port->port.delta_msr_wait);
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
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;
|
|
|
|
if (tty_flag != TTY_NORMAL)
|
|
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->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);
|
|
}
|
|
|
|
static struct usb_serial_driver pl2303_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "pl2303",
|
|
},
|
|
.id_table = id_table,
|
|
.num_bulk_in = 1,
|
|
.num_bulk_out = 1,
|
|
.num_interrupt_in = 0, /* see pl2303_calc_num_ports */
|
|
.bulk_in_size = 256,
|
|
.bulk_out_size = 256,
|
|
.open = pl2303_open,
|
|
.close = pl2303_close,
|
|
.dtr_rts = pl2303_dtr_rts,
|
|
.carrier_raised = pl2303_carrier_raised,
|
|
.break_ctl = pl2303_break_ctl,
|
|
.set_termios = pl2303_set_termios,
|
|
.tiocmget = pl2303_tiocmget,
|
|
.tiocmset = pl2303_tiocmset,
|
|
.tiocmiwait = usb_serial_generic_tiocmiwait,
|
|
.process_read_urb = pl2303_process_read_urb,
|
|
.read_int_callback = pl2303_read_int_callback,
|
|
.probe = pl2303_probe,
|
|
.calc_num_ports = pl2303_calc_num_ports,
|
|
.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("Prolific PL2303 USB to serial adaptor driver");
|
|
MODULE_LICENSE("GPL v2");
|