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1255 lines
33 KiB
1255 lines
33 KiB
// 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 ([email protected]) |
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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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|
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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_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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{ } /* Terminating entry */ |
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}; |
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MODULE_DEVICE_TABLE(usb, id_table); |
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|
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#define SET_LINE_REQUEST_TYPE 0x21 |
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#define SET_LINE_REQUEST 0x20 |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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/* |
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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 0x110: |
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switch (bcdDevice) { |
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case 0x300: |
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return TYPE_HX; |
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case 0x400: |
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return TYPE_HXD; |
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default: |
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return TYPE_HX; |
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} |
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break; |
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case 0x200: |
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switch (bcdDevice) { |
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case 0x100: |
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case 0x305: |
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case 0x405: |
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/* |
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* Assume it's an HXN-type if the device doesn't |
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* support the old read request value. |
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*/ |
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if (!pl2303_supports_hx_status(serial)) |
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return TYPE_HXN; |
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break; |
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case 0x300: |
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return TYPE_TA; |
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case 0x500: |
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return TYPE_TB; |
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} |
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break; |
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} |
|
|
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dev_err(&serial->interface->dev, |
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"unknown device type, please report to [email protected]\n"); |
|
return -ENODEV; |
|
} |
|
|
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static int pl2303_startup(struct usb_serial *serial) |
|
{ |
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struct pl2303_serial_private *spriv; |
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enum pl2303_type type; |
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unsigned char *buf; |
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int ret; |
|
|
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ret = pl2303_detect_type(serial); |
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if (ret < 0) |
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return ret; |
|
|
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type = ret; |
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dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); |
|
|
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spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); |
|
if (!spriv) |
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return -ENOMEM; |
|
|
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spriv->type = &pl2303_type_data[type]; |
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spriv->quirks = (unsigned long)usb_get_serial_data(serial); |
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spriv->quirks |= spriv->type->quirks; |
|
|
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usb_set_serial_data(serial, spriv); |
|
|
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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");
|
|
|