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1318 lines
32 KiB
1318 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* mxuport.c - MOXA UPort series driver |
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* |
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* Copyright (c) 2006 Moxa Technologies Co., Ltd. |
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* Copyright (c) 2013 Andrew Lunn <[email protected]> |
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* |
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* Supports the following Moxa USB to serial converters: |
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* 2 ports : UPort 1250, UPort 1250I |
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* 4 ports : UPort 1410, UPort 1450, UPort 1450I |
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* 8 ports : UPort 1610-8, UPort 1650-8 |
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* 16 ports : UPort 1610-16, UPort 1650-16 |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/firmware.h> |
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#include <linux/jiffies.h> |
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#include <linux/serial.h> |
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#include <linux/serial_reg.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/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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|
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/* Definitions for the vendor ID and device ID */ |
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#define MX_USBSERIAL_VID 0x110A |
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#define MX_UPORT1250_PID 0x1250 |
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#define MX_UPORT1251_PID 0x1251 |
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#define MX_UPORT1410_PID 0x1410 |
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#define MX_UPORT1450_PID 0x1450 |
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#define MX_UPORT1451_PID 0x1451 |
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#define MX_UPORT1618_PID 0x1618 |
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#define MX_UPORT1658_PID 0x1658 |
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#define MX_UPORT1613_PID 0x1613 |
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#define MX_UPORT1653_PID 0x1653 |
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|
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/* Definitions for USB info */ |
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#define HEADER_SIZE 4 |
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#define EVENT_LENGTH 8 |
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#define DOWN_BLOCK_SIZE 64 |
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|
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/* Definitions for firmware info */ |
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#define VER_ADDR_1 0x20 |
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#define VER_ADDR_2 0x24 |
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#define VER_ADDR_3 0x28 |
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|
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/* Definitions for USB vendor request */ |
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#define RQ_VENDOR_NONE 0x00 |
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#define RQ_VENDOR_SET_BAUD 0x01 /* Set baud rate */ |
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#define RQ_VENDOR_SET_LINE 0x02 /* Set line status */ |
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#define RQ_VENDOR_SET_CHARS 0x03 /* Set Xon/Xoff chars */ |
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#define RQ_VENDOR_SET_RTS 0x04 /* Set RTS */ |
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#define RQ_VENDOR_SET_DTR 0x05 /* Set DTR */ |
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#define RQ_VENDOR_SET_XONXOFF 0x06 /* Set auto Xon/Xoff */ |
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#define RQ_VENDOR_SET_RX_HOST_EN 0x07 /* Set RX host enable */ |
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#define RQ_VENDOR_SET_OPEN 0x08 /* Set open/close port */ |
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#define RQ_VENDOR_PURGE 0x09 /* Purge Rx/Tx buffer */ |
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#define RQ_VENDOR_SET_MCR 0x0A /* Set MCR register */ |
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#define RQ_VENDOR_SET_BREAK 0x0B /* Set Break signal */ |
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|
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#define RQ_VENDOR_START_FW_DOWN 0x0C /* Start firmware download */ |
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#define RQ_VENDOR_STOP_FW_DOWN 0x0D /* Stop firmware download */ |
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#define RQ_VENDOR_QUERY_FW_READY 0x0E /* Query if new firmware ready */ |
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|
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#define RQ_VENDOR_SET_FIFO_DISABLE 0x0F /* Set fifo disable */ |
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#define RQ_VENDOR_SET_INTERFACE 0x10 /* Set interface */ |
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#define RQ_VENDOR_SET_HIGH_PERFOR 0x11 /* Set hi-performance */ |
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|
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#define RQ_VENDOR_ERASE_BLOCK 0x12 /* Erase flash block */ |
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#define RQ_VENDOR_WRITE_PAGE 0x13 /* Write flash page */ |
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#define RQ_VENDOR_PREPARE_WRITE 0x14 /* Prepare write flash */ |
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#define RQ_VENDOR_CONFIRM_WRITE 0x15 /* Confirm write flash */ |
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#define RQ_VENDOR_LOCATE 0x16 /* Locate the device */ |
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|
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#define RQ_VENDOR_START_ROM_DOWN 0x17 /* Start firmware download */ |
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#define RQ_VENDOR_ROM_DATA 0x18 /* Rom file data */ |
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#define RQ_VENDOR_STOP_ROM_DOWN 0x19 /* Stop firmware download */ |
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#define RQ_VENDOR_FW_DATA 0x20 /* Firmware data */ |
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|
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#define RQ_VENDOR_RESET_DEVICE 0x23 /* Try to reset the device */ |
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#define RQ_VENDOR_QUERY_FW_CONFIG 0x24 |
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|
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#define RQ_VENDOR_GET_VERSION 0x81 /* Get firmware version */ |
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#define RQ_VENDOR_GET_PAGE 0x82 /* Read flash page */ |
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#define RQ_VENDOR_GET_ROM_PROC 0x83 /* Get ROM process state */ |
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|
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#define RQ_VENDOR_GET_INQUEUE 0x84 /* Data in input buffer */ |
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#define RQ_VENDOR_GET_OUTQUEUE 0x85 /* Data in output buffer */ |
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|
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#define RQ_VENDOR_GET_MSR 0x86 /* Get modem status register */ |
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|
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/* Definitions for UPort event type */ |
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#define UPORT_EVENT_NONE 0 /* None */ |
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#define UPORT_EVENT_TXBUF_THRESHOLD 1 /* Tx buffer threshold */ |
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#define UPORT_EVENT_SEND_NEXT 2 /* Send next */ |
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#define UPORT_EVENT_MSR 3 /* Modem status */ |
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#define UPORT_EVENT_LSR 4 /* Line status */ |
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#define UPORT_EVENT_MCR 5 /* Modem control */ |
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|
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/* Definitions for serial event type */ |
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#define SERIAL_EV_CTS 0x0008 /* CTS changed state */ |
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#define SERIAL_EV_DSR 0x0010 /* DSR changed state */ |
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#define SERIAL_EV_RLSD 0x0020 /* RLSD changed state */ |
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|
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/* Definitions for modem control event type */ |
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#define SERIAL_EV_XOFF 0x40 /* XOFF received */ |
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|
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/* Definitions for line control of communication */ |
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#define MX_WORDLENGTH_5 5 |
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#define MX_WORDLENGTH_6 6 |
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#define MX_WORDLENGTH_7 7 |
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#define MX_WORDLENGTH_8 8 |
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|
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#define MX_PARITY_NONE 0 |
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#define MX_PARITY_ODD 1 |
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#define MX_PARITY_EVEN 2 |
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#define MX_PARITY_MARK 3 |
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#define MX_PARITY_SPACE 4 |
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|
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#define MX_STOP_BITS_1 0 |
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#define MX_STOP_BITS_1_5 1 |
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#define MX_STOP_BITS_2 2 |
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|
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#define MX_RTS_DISABLE 0x0 |
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#define MX_RTS_ENABLE 0x1 |
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#define MX_RTS_HW 0x2 |
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#define MX_RTS_NO_CHANGE 0x3 /* Flag, not valid register value*/ |
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|
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#define MX_INT_RS232 0 |
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#define MX_INT_2W_RS485 1 |
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#define MX_INT_RS422 2 |
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#define MX_INT_4W_RS485 3 |
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|
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/* Definitions for holding reason */ |
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#define MX_WAIT_FOR_CTS 0x0001 |
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#define MX_WAIT_FOR_DSR 0x0002 |
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#define MX_WAIT_FOR_DCD 0x0004 |
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#define MX_WAIT_FOR_XON 0x0008 |
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#define MX_WAIT_FOR_START_TX 0x0010 |
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#define MX_WAIT_FOR_UNTHROTTLE 0x0020 |
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#define MX_WAIT_FOR_LOW_WATER 0x0040 |
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#define MX_WAIT_FOR_SEND_NEXT 0x0080 |
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#define MX_UPORT_2_PORT BIT(0) |
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#define MX_UPORT_4_PORT BIT(1) |
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#define MX_UPORT_8_PORT BIT(2) |
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#define MX_UPORT_16_PORT BIT(3) |
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|
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/* This structure holds all of the local port information */ |
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struct mxuport_port { |
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u8 mcr_state; /* Last MCR state */ |
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u8 msr_state; /* Last MSR state */ |
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struct mutex mutex; /* Protects mcr_state */ |
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spinlock_t spinlock; /* Protects msr_state */ |
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}; |
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|
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/* Table of devices that work with this driver */ |
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static const struct usb_device_id mxuport_idtable[] = { |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1250_PID), |
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.driver_info = MX_UPORT_2_PORT }, |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1251_PID), |
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.driver_info = MX_UPORT_2_PORT }, |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1410_PID), |
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.driver_info = MX_UPORT_4_PORT }, |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1450_PID), |
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.driver_info = MX_UPORT_4_PORT }, |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1451_PID), |
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.driver_info = MX_UPORT_4_PORT }, |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1618_PID), |
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.driver_info = MX_UPORT_8_PORT }, |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1658_PID), |
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.driver_info = MX_UPORT_8_PORT }, |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1613_PID), |
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.driver_info = MX_UPORT_16_PORT }, |
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{ USB_DEVICE(MX_USBSERIAL_VID, MX_UPORT1653_PID), |
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.driver_info = MX_UPORT_16_PORT }, |
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{} /* Terminating entry */ |
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}; |
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MODULE_DEVICE_TABLE(usb, mxuport_idtable); |
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|
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/* |
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* Add a four byte header containing the port number and the number of |
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* bytes of data in the message. Return the number of bytes in the |
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* buffer. |
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*/ |
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static int mxuport_prepare_write_buffer(struct usb_serial_port *port, |
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void *dest, size_t size) |
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{ |
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u8 *buf = dest; |
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int count; |
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count = kfifo_out_locked(&port->write_fifo, buf + HEADER_SIZE, |
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size - HEADER_SIZE, |
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&port->lock); |
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put_unaligned_be16(port->port_number, buf); |
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put_unaligned_be16(count, buf + 2); |
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dev_dbg(&port->dev, "%s - size %zd count %d\n", __func__, |
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size, count); |
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return count + HEADER_SIZE; |
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} |
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/* Read the given buffer in from the control pipe. */ |
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static int mxuport_recv_ctrl_urb(struct usb_serial *serial, |
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u8 request, u16 value, u16 index, |
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u8 *data, size_t size) |
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{ |
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int status; |
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status = usb_control_msg(serial->dev, |
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usb_rcvctrlpipe(serial->dev, 0), |
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request, |
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(USB_DIR_IN | USB_TYPE_VENDOR | |
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USB_RECIP_DEVICE), value, index, |
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data, size, |
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USB_CTRL_GET_TIMEOUT); |
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if (status < 0) { |
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dev_err(&serial->interface->dev, |
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"%s - usb_control_msg failed (%d)\n", |
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__func__, status); |
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return status; |
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} |
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if (status != size) { |
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dev_err(&serial->interface->dev, |
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"%s - short read (%d / %zd)\n", |
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__func__, status, size); |
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return -EIO; |
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} |
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return status; |
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} |
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/* Write the given buffer out to the control pipe. */ |
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static int mxuport_send_ctrl_data_urb(struct usb_serial *serial, |
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u8 request, |
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u16 value, u16 index, |
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u8 *data, size_t size) |
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{ |
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int status; |
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status = usb_control_msg(serial->dev, |
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usb_sndctrlpipe(serial->dev, 0), |
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request, |
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(USB_DIR_OUT | USB_TYPE_VENDOR | |
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USB_RECIP_DEVICE), value, index, |
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data, size, |
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USB_CTRL_SET_TIMEOUT); |
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if (status < 0) { |
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dev_err(&serial->interface->dev, |
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"%s - usb_control_msg failed (%d)\n", |
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__func__, status); |
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return status; |
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} |
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return 0; |
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} |
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/* Send a vendor request without any data */ |
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static int mxuport_send_ctrl_urb(struct usb_serial *serial, |
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u8 request, u16 value, u16 index) |
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{ |
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return mxuport_send_ctrl_data_urb(serial, request, value, index, |
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NULL, 0); |
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} |
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/* |
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* mxuport_throttle - throttle function of driver |
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* |
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* This function is called by the tty driver when it wants to stop the |
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* data being read from the port. Since all the data comes over one |
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* bulk in endpoint, we cannot stop submitting urbs by setting |
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* port->throttle. Instead tell the device to stop sending us data for |
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* the port. |
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*/ |
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static void mxuport_throttle(struct tty_struct *tty) |
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{ |
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struct usb_serial_port *port = tty->driver_data; |
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struct usb_serial *serial = port->serial; |
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dev_dbg(&port->dev, "%s\n", __func__); |
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mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN, |
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0, port->port_number); |
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} |
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/* |
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* mxuport_unthrottle - unthrottle function of driver |
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* |
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* This function is called by the tty driver when it wants to resume |
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* the data being read from the port. Tell the device it can resume |
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* sending us received data from the port. |
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*/ |
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static void mxuport_unthrottle(struct tty_struct *tty) |
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{ |
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|
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struct usb_serial_port *port = tty->driver_data; |
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struct usb_serial *serial = port->serial; |
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dev_dbg(&port->dev, "%s\n", __func__); |
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mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN, |
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1, port->port_number); |
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} |
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|
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/* |
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* Processes one chunk of data received for a port. Mostly a copy of |
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* usb_serial_generic_process_read_urb(). |
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*/ |
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static void mxuport_process_read_urb_data(struct usb_serial_port *port, |
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char *data, int size) |
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{ |
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int i; |
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if (port->sysrq) { |
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for (i = 0; i < size; i++, data++) { |
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if (!usb_serial_handle_sysrq_char(port, *data)) |
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tty_insert_flip_char(&port->port, *data, |
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TTY_NORMAL); |
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} |
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} else { |
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tty_insert_flip_string(&port->port, data, size); |
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} |
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tty_flip_buffer_push(&port->port); |
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} |
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static void mxuport_msr_event(struct usb_serial_port *port, u8 buf[4]) |
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{ |
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struct mxuport_port *mxport = usb_get_serial_port_data(port); |
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u8 rcv_msr_hold = buf[2] & 0xF0; |
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u16 rcv_msr_event = get_unaligned_be16(buf); |
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unsigned long flags; |
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|
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if (rcv_msr_event == 0) |
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return; |
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|
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/* Update MSR status */ |
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spin_lock_irqsave(&mxport->spinlock, flags); |
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dev_dbg(&port->dev, "%s - current MSR status = 0x%x\n", |
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__func__, mxport->msr_state); |
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if (rcv_msr_hold & UART_MSR_CTS) { |
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mxport->msr_state |= UART_MSR_CTS; |
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dev_dbg(&port->dev, "%s - CTS high\n", __func__); |
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} else { |
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mxport->msr_state &= ~UART_MSR_CTS; |
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dev_dbg(&port->dev, "%s - CTS low\n", __func__); |
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} |
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|
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if (rcv_msr_hold & UART_MSR_DSR) { |
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mxport->msr_state |= UART_MSR_DSR; |
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dev_dbg(&port->dev, "%s - DSR high\n", __func__); |
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} else { |
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mxport->msr_state &= ~UART_MSR_DSR; |
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dev_dbg(&port->dev, "%s - DSR low\n", __func__); |
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} |
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|
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if (rcv_msr_hold & UART_MSR_DCD) { |
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mxport->msr_state |= UART_MSR_DCD; |
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dev_dbg(&port->dev, "%s - DCD high\n", __func__); |
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} else { |
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mxport->msr_state &= ~UART_MSR_DCD; |
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dev_dbg(&port->dev, "%s - DCD low\n", __func__); |
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} |
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spin_unlock_irqrestore(&mxport->spinlock, flags); |
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|
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if (rcv_msr_event & |
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(SERIAL_EV_CTS | SERIAL_EV_DSR | SERIAL_EV_RLSD)) { |
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|
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if (rcv_msr_event & SERIAL_EV_CTS) { |
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port->icount.cts++; |
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dev_dbg(&port->dev, "%s - CTS change\n", __func__); |
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} |
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|
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if (rcv_msr_event & SERIAL_EV_DSR) { |
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port->icount.dsr++; |
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dev_dbg(&port->dev, "%s - DSR change\n", __func__); |
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} |
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|
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if (rcv_msr_event & SERIAL_EV_RLSD) { |
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port->icount.dcd++; |
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dev_dbg(&port->dev, "%s - DCD change\n", __func__); |
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} |
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wake_up_interruptible(&port->port.delta_msr_wait); |
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} |
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} |
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|
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static void mxuport_lsr_event(struct usb_serial_port *port, u8 buf[4]) |
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{ |
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u8 lsr_event = buf[2]; |
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|
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if (lsr_event & UART_LSR_BI) { |
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port->icount.brk++; |
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dev_dbg(&port->dev, "%s - break error\n", __func__); |
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} |
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|
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if (lsr_event & UART_LSR_FE) { |
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port->icount.frame++; |
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dev_dbg(&port->dev, "%s - frame error\n", __func__); |
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} |
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|
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if (lsr_event & UART_LSR_PE) { |
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port->icount.parity++; |
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dev_dbg(&port->dev, "%s - parity error\n", __func__); |
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} |
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|
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if (lsr_event & UART_LSR_OE) { |
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port->icount.overrun++; |
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dev_dbg(&port->dev, "%s - overrun error\n", __func__); |
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} |
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} |
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|
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/* |
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* When something interesting happens, modem control lines XON/XOFF |
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* etc, the device sends an event. Process these events. |
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*/ |
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static void mxuport_process_read_urb_event(struct usb_serial_port *port, |
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u8 buf[4], u32 event) |
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{ |
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dev_dbg(&port->dev, "%s - receive event : %04x\n", __func__, event); |
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|
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switch (event) { |
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case UPORT_EVENT_SEND_NEXT: |
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/* |
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* Sent as part of the flow control on device buffers. |
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* Not currently used. |
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*/ |
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break; |
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case UPORT_EVENT_MSR: |
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mxuport_msr_event(port, buf); |
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break; |
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case UPORT_EVENT_LSR: |
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mxuport_lsr_event(port, buf); |
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break; |
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case UPORT_EVENT_MCR: |
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/* |
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* Event to indicate a change in XON/XOFF from the |
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* peer. Currently not used. We just continue |
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* sending the device data and it will buffer it if |
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* needed. This event could be used for flow control |
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* between the host and the device. |
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*/ |
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break; |
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default: |
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dev_dbg(&port->dev, "Unexpected event\n"); |
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break; |
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} |
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} |
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|
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/* |
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* One URB can contain data for multiple ports. Demultiplex the data, |
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* checking the port exists, is opened and the message is valid. |
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*/ |
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static void mxuport_process_read_urb_demux_data(struct urb *urb) |
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{ |
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struct usb_serial_port *port = urb->context; |
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struct usb_serial *serial = port->serial; |
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u8 *data = urb->transfer_buffer; |
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u8 *end = data + urb->actual_length; |
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struct usb_serial_port *demux_port; |
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u8 *ch; |
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u16 rcv_port; |
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u16 rcv_len; |
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|
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while (data < end) { |
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if (data + HEADER_SIZE > end) { |
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dev_warn(&port->dev, "%s - message with short header\n", |
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__func__); |
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return; |
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} |
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|
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rcv_port = get_unaligned_be16(data); |
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if (rcv_port >= serial->num_ports) { |
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dev_warn(&port->dev, "%s - message for invalid port\n", |
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__func__); |
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return; |
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} |
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|
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demux_port = serial->port[rcv_port]; |
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rcv_len = get_unaligned_be16(data + 2); |
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if (!rcv_len || data + HEADER_SIZE + rcv_len > end) { |
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dev_warn(&port->dev, "%s - short data\n", __func__); |
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return; |
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} |
|
|
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if (tty_port_initialized(&demux_port->port)) { |
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ch = data + HEADER_SIZE; |
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mxuport_process_read_urb_data(demux_port, ch, rcv_len); |
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} else { |
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dev_dbg(&demux_port->dev, "%s - data for closed port\n", |
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__func__); |
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} |
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data += HEADER_SIZE + rcv_len; |
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} |
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} |
|
|
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/* |
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* One URB can contain events for multiple ports. Demultiplex the event, |
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* checking the port exists, and is opened. |
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*/ |
|
static void mxuport_process_read_urb_demux_event(struct urb *urb) |
|
{ |
|
struct usb_serial_port *port = urb->context; |
|
struct usb_serial *serial = port->serial; |
|
u8 *data = urb->transfer_buffer; |
|
u8 *end = data + urb->actual_length; |
|
struct usb_serial_port *demux_port; |
|
u8 *ch; |
|
u16 rcv_port; |
|
u16 rcv_event; |
|
|
|
while (data < end) { |
|
if (data + EVENT_LENGTH > end) { |
|
dev_warn(&port->dev, "%s - message with short event\n", |
|
__func__); |
|
return; |
|
} |
|
|
|
rcv_port = get_unaligned_be16(data); |
|
if (rcv_port >= serial->num_ports) { |
|
dev_warn(&port->dev, "%s - message for invalid port\n", |
|
__func__); |
|
return; |
|
} |
|
|
|
demux_port = serial->port[rcv_port]; |
|
if (tty_port_initialized(&demux_port->port)) { |
|
ch = data + HEADER_SIZE; |
|
rcv_event = get_unaligned_be16(data + 2); |
|
mxuport_process_read_urb_event(demux_port, ch, |
|
rcv_event); |
|
} else { |
|
dev_dbg(&demux_port->dev, |
|
"%s - event for closed port\n", __func__); |
|
} |
|
data += EVENT_LENGTH; |
|
} |
|
} |
|
|
|
/* |
|
* This is called when we have received data on the bulk in |
|
* endpoint. Depending on which port it was received on, it can |
|
* contain serial data or events. |
|
*/ |
|
static void mxuport_process_read_urb(struct urb *urb) |
|
{ |
|
struct usb_serial_port *port = urb->context; |
|
struct usb_serial *serial = port->serial; |
|
|
|
if (port == serial->port[0]) |
|
mxuport_process_read_urb_demux_data(urb); |
|
|
|
if (port == serial->port[1]) |
|
mxuport_process_read_urb_demux_event(urb); |
|
} |
|
|
|
/* |
|
* Ask the device how many bytes it has queued to be sent out. If |
|
* there are none, return true. |
|
*/ |
|
static bool mxuport_tx_empty(struct usb_serial_port *port) |
|
{ |
|
struct usb_serial *serial = port->serial; |
|
bool is_empty = true; |
|
u32 txlen; |
|
u8 *len_buf; |
|
int err; |
|
|
|
len_buf = kzalloc(4, GFP_KERNEL); |
|
if (!len_buf) |
|
goto out; |
|
|
|
err = mxuport_recv_ctrl_urb(serial, RQ_VENDOR_GET_OUTQUEUE, 0, |
|
port->port_number, len_buf, 4); |
|
if (err < 0) |
|
goto out; |
|
|
|
txlen = get_unaligned_be32(len_buf); |
|
dev_dbg(&port->dev, "%s - tx len = %u\n", __func__, txlen); |
|
|
|
if (txlen != 0) |
|
is_empty = false; |
|
|
|
out: |
|
kfree(len_buf); |
|
return is_empty; |
|
} |
|
|
|
static int mxuport_set_mcr(struct usb_serial_port *port, u8 mcr_state) |
|
{ |
|
struct usb_serial *serial = port->serial; |
|
int err; |
|
|
|
dev_dbg(&port->dev, "%s - %02x\n", __func__, mcr_state); |
|
|
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_MCR, |
|
mcr_state, port->port_number); |
|
if (err) |
|
dev_err(&port->dev, "%s - failed to change MCR\n", __func__); |
|
|
|
return err; |
|
} |
|
|
|
static int mxuport_set_dtr(struct usb_serial_port *port, int on) |
|
{ |
|
struct mxuport_port *mxport = usb_get_serial_port_data(port); |
|
struct usb_serial *serial = port->serial; |
|
int err; |
|
|
|
mutex_lock(&mxport->mutex); |
|
|
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_DTR, |
|
!!on, port->port_number); |
|
if (!err) { |
|
if (on) |
|
mxport->mcr_state |= UART_MCR_DTR; |
|
else |
|
mxport->mcr_state &= ~UART_MCR_DTR; |
|
} |
|
|
|
mutex_unlock(&mxport->mutex); |
|
|
|
return err; |
|
} |
|
|
|
static int mxuport_set_rts(struct usb_serial_port *port, u8 state) |
|
{ |
|
struct mxuport_port *mxport = usb_get_serial_port_data(port); |
|
struct usb_serial *serial = port->serial; |
|
int err; |
|
u8 mcr_state; |
|
|
|
mutex_lock(&mxport->mutex); |
|
mcr_state = mxport->mcr_state; |
|
|
|
switch (state) { |
|
case MX_RTS_DISABLE: |
|
mcr_state &= ~UART_MCR_RTS; |
|
break; |
|
case MX_RTS_ENABLE: |
|
mcr_state |= UART_MCR_RTS; |
|
break; |
|
case MX_RTS_HW: |
|
/* |
|
* Do not update mxport->mcr_state when doing hardware |
|
* flow control. |
|
*/ |
|
break; |
|
default: |
|
/* |
|
* Should not happen, but somebody might try passing |
|
* MX_RTS_NO_CHANGE, which is not valid. |
|
*/ |
|
err = -EINVAL; |
|
goto out; |
|
} |
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RTS, |
|
state, port->port_number); |
|
if (!err) |
|
mxport->mcr_state = mcr_state; |
|
|
|
out: |
|
mutex_unlock(&mxport->mutex); |
|
|
|
return err; |
|
} |
|
|
|
static void mxuport_dtr_rts(struct usb_serial_port *port, int on) |
|
{ |
|
struct mxuport_port *mxport = usb_get_serial_port_data(port); |
|
u8 mcr_state; |
|
int err; |
|
|
|
mutex_lock(&mxport->mutex); |
|
mcr_state = mxport->mcr_state; |
|
|
|
if (on) |
|
mcr_state |= (UART_MCR_RTS | UART_MCR_DTR); |
|
else |
|
mcr_state &= ~(UART_MCR_RTS | UART_MCR_DTR); |
|
|
|
err = mxuport_set_mcr(port, mcr_state); |
|
if (!err) |
|
mxport->mcr_state = mcr_state; |
|
|
|
mutex_unlock(&mxport->mutex); |
|
} |
|
|
|
static int mxuport_tiocmset(struct tty_struct *tty, unsigned int set, |
|
unsigned int clear) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct mxuport_port *mxport = usb_get_serial_port_data(port); |
|
int err; |
|
u8 mcr_state; |
|
|
|
mutex_lock(&mxport->mutex); |
|
mcr_state = mxport->mcr_state; |
|
|
|
if (set & TIOCM_RTS) |
|
mcr_state |= UART_MCR_RTS; |
|
|
|
if (set & TIOCM_DTR) |
|
mcr_state |= UART_MCR_DTR; |
|
|
|
if (clear & TIOCM_RTS) |
|
mcr_state &= ~UART_MCR_RTS; |
|
|
|
if (clear & TIOCM_DTR) |
|
mcr_state &= ~UART_MCR_DTR; |
|
|
|
err = mxuport_set_mcr(port, mcr_state); |
|
if (!err) |
|
mxport->mcr_state = mcr_state; |
|
|
|
mutex_unlock(&mxport->mutex); |
|
|
|
return err; |
|
} |
|
|
|
static int mxuport_tiocmget(struct tty_struct *tty) |
|
{ |
|
struct mxuport_port *mxport; |
|
struct usb_serial_port *port = tty->driver_data; |
|
unsigned int result; |
|
unsigned long flags; |
|
unsigned int msr; |
|
unsigned int mcr; |
|
|
|
mxport = usb_get_serial_port_data(port); |
|
|
|
mutex_lock(&mxport->mutex); |
|
spin_lock_irqsave(&mxport->spinlock, flags); |
|
|
|
msr = mxport->msr_state; |
|
mcr = mxport->mcr_state; |
|
|
|
spin_unlock_irqrestore(&mxport->spinlock, flags); |
|
mutex_unlock(&mxport->mutex); |
|
|
|
result = (((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) | /* 0x002 */ |
|
((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) | /* 0x004 */ |
|
((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) | /* 0x020 */ |
|
((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) | /* 0x040 */ |
|
((msr & UART_MSR_RI) ? TIOCM_RI : 0) | /* 0x080 */ |
|
((msr & UART_MSR_DSR) ? TIOCM_DSR : 0)); /* 0x100 */ |
|
|
|
dev_dbg(&port->dev, "%s - 0x%04x\n", __func__, result); |
|
|
|
return result; |
|
} |
|
|
|
static int mxuport_set_termios_flow(struct tty_struct *tty, |
|
struct ktermios *old_termios, |
|
struct usb_serial_port *port, |
|
struct usb_serial *serial) |
|
{ |
|
u8 xon = START_CHAR(tty); |
|
u8 xoff = STOP_CHAR(tty); |
|
int enable; |
|
int err; |
|
u8 *buf; |
|
u8 rts; |
|
|
|
buf = kmalloc(2, GFP_KERNEL); |
|
if (!buf) |
|
return -ENOMEM; |
|
|
|
/* S/W flow control settings */ |
|
if (I_IXOFF(tty) || I_IXON(tty)) { |
|
enable = 1; |
|
buf[0] = xon; |
|
buf[1] = xoff; |
|
|
|
err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_CHARS, |
|
0, port->port_number, |
|
buf, 2); |
|
if (err) |
|
goto out; |
|
|
|
dev_dbg(&port->dev, "%s - XON = 0x%02x, XOFF = 0x%02x\n", |
|
__func__, xon, xoff); |
|
} else { |
|
enable = 0; |
|
} |
|
|
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_XONXOFF, |
|
enable, port->port_number); |
|
if (err) |
|
goto out; |
|
|
|
rts = MX_RTS_NO_CHANGE; |
|
|
|
/* H/W flow control settings */ |
|
if (!old_termios || |
|
C_CRTSCTS(tty) != (old_termios->c_cflag & CRTSCTS)) { |
|
if (C_CRTSCTS(tty)) |
|
rts = MX_RTS_HW; |
|
else |
|
rts = MX_RTS_ENABLE; |
|
} |
|
|
|
if (C_BAUD(tty)) { |
|
if (old_termios && (old_termios->c_cflag & CBAUD) == B0) { |
|
/* Raise DTR and RTS */ |
|
if (C_CRTSCTS(tty)) |
|
rts = MX_RTS_HW; |
|
else |
|
rts = MX_RTS_ENABLE; |
|
mxuport_set_dtr(port, 1); |
|
} |
|
} else { |
|
/* Drop DTR and RTS */ |
|
rts = MX_RTS_DISABLE; |
|
mxuport_set_dtr(port, 0); |
|
} |
|
|
|
if (rts != MX_RTS_NO_CHANGE) |
|
err = mxuport_set_rts(port, rts); |
|
|
|
out: |
|
kfree(buf); |
|
return err; |
|
} |
|
|
|
static void mxuport_set_termios(struct tty_struct *tty, |
|
struct usb_serial_port *port, |
|
struct ktermios *old_termios) |
|
{ |
|
struct usb_serial *serial = port->serial; |
|
u8 *buf; |
|
u8 data_bits; |
|
u8 stop_bits; |
|
u8 parity; |
|
int baud; |
|
int err; |
|
|
|
if (old_termios && |
|
!tty_termios_hw_change(&tty->termios, old_termios) && |
|
tty->termios.c_iflag == old_termios->c_iflag) { |
|
dev_dbg(&port->dev, "%s - nothing to change\n", __func__); |
|
return; |
|
} |
|
|
|
buf = kmalloc(4, GFP_KERNEL); |
|
if (!buf) |
|
return; |
|
|
|
/* Set data bit of termios */ |
|
switch (C_CSIZE(tty)) { |
|
case CS5: |
|
data_bits = MX_WORDLENGTH_5; |
|
break; |
|
case CS6: |
|
data_bits = MX_WORDLENGTH_6; |
|
break; |
|
case CS7: |
|
data_bits = MX_WORDLENGTH_7; |
|
break; |
|
case CS8: |
|
default: |
|
data_bits = MX_WORDLENGTH_8; |
|
break; |
|
} |
|
|
|
/* Set parity of termios */ |
|
if (C_PARENB(tty)) { |
|
if (C_CMSPAR(tty)) { |
|
if (C_PARODD(tty)) |
|
parity = MX_PARITY_MARK; |
|
else |
|
parity = MX_PARITY_SPACE; |
|
} else { |
|
if (C_PARODD(tty)) |
|
parity = MX_PARITY_ODD; |
|
else |
|
parity = MX_PARITY_EVEN; |
|
} |
|
} else { |
|
parity = MX_PARITY_NONE; |
|
} |
|
|
|
/* Set stop bit of termios */ |
|
if (C_CSTOPB(tty)) |
|
stop_bits = MX_STOP_BITS_2; |
|
else |
|
stop_bits = MX_STOP_BITS_1; |
|
|
|
buf[0] = data_bits; |
|
buf[1] = parity; |
|
buf[2] = stop_bits; |
|
buf[3] = 0; |
|
|
|
err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_LINE, |
|
0, port->port_number, buf, 4); |
|
if (err) |
|
goto out; |
|
|
|
err = mxuport_set_termios_flow(tty, old_termios, port, serial); |
|
if (err) |
|
goto out; |
|
|
|
baud = tty_get_baud_rate(tty); |
|
if (!baud) |
|
baud = 9600; |
|
|
|
/* Note: Little Endian */ |
|
put_unaligned_le32(baud, buf); |
|
|
|
err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_SET_BAUD, |
|
0, port->port_number, |
|
buf, 4); |
|
if (err) |
|
goto out; |
|
|
|
dev_dbg(&port->dev, "baud_rate : %d\n", baud); |
|
dev_dbg(&port->dev, "data_bits : %d\n", data_bits); |
|
dev_dbg(&port->dev, "parity : %d\n", parity); |
|
dev_dbg(&port->dev, "stop_bits : %d\n", stop_bits); |
|
|
|
out: |
|
kfree(buf); |
|
} |
|
|
|
/* |
|
* Determine how many ports this device has dynamically. It will be |
|
* called after the probe() callback is called, but before attach(). |
|
*/ |
|
static int mxuport_calc_num_ports(struct usb_serial *serial, |
|
struct usb_serial_endpoints *epds) |
|
{ |
|
unsigned long features = (unsigned long)usb_get_serial_data(serial); |
|
int num_ports; |
|
int i; |
|
|
|
if (features & MX_UPORT_2_PORT) { |
|
num_ports = 2; |
|
} else if (features & MX_UPORT_4_PORT) { |
|
num_ports = 4; |
|
} else if (features & MX_UPORT_8_PORT) { |
|
num_ports = 8; |
|
} else if (features & MX_UPORT_16_PORT) { |
|
num_ports = 16; |
|
} else { |
|
dev_warn(&serial->interface->dev, |
|
"unknown device, assuming two ports\n"); |
|
num_ports = 2; |
|
} |
|
|
|
/* |
|
* Setup bulk-out endpoint multiplexing. All ports share the same |
|
* bulk-out endpoint. |
|
*/ |
|
BUILD_BUG_ON(ARRAY_SIZE(epds->bulk_out) < 16); |
|
|
|
for (i = 1; i < num_ports; ++i) |
|
epds->bulk_out[i] = epds->bulk_out[0]; |
|
|
|
epds->num_bulk_out = num_ports; |
|
|
|
return num_ports; |
|
} |
|
|
|
/* Get the version of the firmware currently running. */ |
|
static int mxuport_get_fw_version(struct usb_serial *serial, u32 *version) |
|
{ |
|
u8 *ver_buf; |
|
int err; |
|
|
|
ver_buf = kzalloc(4, GFP_KERNEL); |
|
if (!ver_buf) |
|
return -ENOMEM; |
|
|
|
/* Get firmware version from SDRAM */ |
|
err = mxuport_recv_ctrl_urb(serial, RQ_VENDOR_GET_VERSION, 0, 0, |
|
ver_buf, 4); |
|
if (err != 4) { |
|
err = -EIO; |
|
goto out; |
|
} |
|
|
|
*version = (ver_buf[0] << 16) | (ver_buf[1] << 8) | ver_buf[2]; |
|
err = 0; |
|
out: |
|
kfree(ver_buf); |
|
return err; |
|
} |
|
|
|
/* Given a firmware blob, download it to the device. */ |
|
static int mxuport_download_fw(struct usb_serial *serial, |
|
const struct firmware *fw_p) |
|
{ |
|
u8 *fw_buf; |
|
size_t txlen; |
|
size_t fwidx; |
|
int err; |
|
|
|
fw_buf = kmalloc(DOWN_BLOCK_SIZE, GFP_KERNEL); |
|
if (!fw_buf) |
|
return -ENOMEM; |
|
|
|
dev_dbg(&serial->interface->dev, "Starting firmware download...\n"); |
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_START_FW_DOWN, 0, 0); |
|
if (err) |
|
goto out; |
|
|
|
fwidx = 0; |
|
do { |
|
txlen = min_t(size_t, (fw_p->size - fwidx), DOWN_BLOCK_SIZE); |
|
|
|
memcpy(fw_buf, &fw_p->data[fwidx], txlen); |
|
err = mxuport_send_ctrl_data_urb(serial, RQ_VENDOR_FW_DATA, |
|
0, 0, fw_buf, txlen); |
|
if (err) { |
|
mxuport_send_ctrl_urb(serial, RQ_VENDOR_STOP_FW_DOWN, |
|
0, 0); |
|
goto out; |
|
} |
|
|
|
fwidx += txlen; |
|
usleep_range(1000, 2000); |
|
|
|
} while (fwidx < fw_p->size); |
|
|
|
msleep(1000); |
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_STOP_FW_DOWN, 0, 0); |
|
if (err) |
|
goto out; |
|
|
|
msleep(1000); |
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_QUERY_FW_READY, 0, 0); |
|
|
|
out: |
|
kfree(fw_buf); |
|
return err; |
|
} |
|
|
|
static int mxuport_probe(struct usb_serial *serial, |
|
const struct usb_device_id *id) |
|
{ |
|
u16 productid = le16_to_cpu(serial->dev->descriptor.idProduct); |
|
const struct firmware *fw_p = NULL; |
|
u32 version; |
|
int local_ver; |
|
char buf[32]; |
|
int err; |
|
|
|
/* Load our firmware */ |
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_QUERY_FW_CONFIG, 0, 0); |
|
if (err) { |
|
mxuport_send_ctrl_urb(serial, RQ_VENDOR_RESET_DEVICE, 0, 0); |
|
return err; |
|
} |
|
|
|
err = mxuport_get_fw_version(serial, &version); |
|
if (err < 0) |
|
return err; |
|
|
|
dev_dbg(&serial->interface->dev, "Device firmware version v%x.%x.%x\n", |
|
(version & 0xff0000) >> 16, |
|
(version & 0xff00) >> 8, |
|
(version & 0xff)); |
|
|
|
snprintf(buf, sizeof(buf) - 1, "moxa/moxa-%04x.fw", productid); |
|
|
|
err = request_firmware(&fw_p, buf, &serial->interface->dev); |
|
if (err) { |
|
dev_warn(&serial->interface->dev, "Firmware %s not found\n", |
|
buf); |
|
|
|
/* Use the firmware already in the device */ |
|
err = 0; |
|
} else { |
|
local_ver = ((fw_p->data[VER_ADDR_1] << 16) | |
|
(fw_p->data[VER_ADDR_2] << 8) | |
|
fw_p->data[VER_ADDR_3]); |
|
dev_dbg(&serial->interface->dev, |
|
"Available firmware version v%x.%x.%x\n", |
|
fw_p->data[VER_ADDR_1], fw_p->data[VER_ADDR_2], |
|
fw_p->data[VER_ADDR_3]); |
|
if (local_ver > version) { |
|
err = mxuport_download_fw(serial, fw_p); |
|
if (err) |
|
goto out; |
|
err = mxuport_get_fw_version(serial, &version); |
|
if (err < 0) |
|
goto out; |
|
} |
|
} |
|
|
|
dev_info(&serial->interface->dev, |
|
"Using device firmware version v%x.%x.%x\n", |
|
(version & 0xff0000) >> 16, |
|
(version & 0xff00) >> 8, |
|
(version & 0xff)); |
|
|
|
/* |
|
* Contains the features of this hardware. Store away for |
|
* later use, eg, number of ports. |
|
*/ |
|
usb_set_serial_data(serial, (void *)id->driver_info); |
|
out: |
|
if (fw_p) |
|
release_firmware(fw_p); |
|
return err; |
|
} |
|
|
|
|
|
static int mxuport_port_probe(struct usb_serial_port *port) |
|
{ |
|
struct usb_serial *serial = port->serial; |
|
struct mxuport_port *mxport; |
|
int err; |
|
|
|
mxport = devm_kzalloc(&port->dev, sizeof(struct mxuport_port), |
|
GFP_KERNEL); |
|
if (!mxport) |
|
return -ENOMEM; |
|
|
|
mutex_init(&mxport->mutex); |
|
spin_lock_init(&mxport->spinlock); |
|
|
|
/* Set the port private data */ |
|
usb_set_serial_port_data(port, mxport); |
|
|
|
/* Set FIFO (Enable) */ |
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_FIFO_DISABLE, |
|
0, port->port_number); |
|
if (err) |
|
return err; |
|
|
|
/* Set transmission mode (Hi-Performance) */ |
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_HIGH_PERFOR, |
|
0, port->port_number); |
|
if (err) |
|
return err; |
|
|
|
/* Set interface (RS-232) */ |
|
return mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_INTERFACE, |
|
MX_INT_RS232, |
|
port->port_number); |
|
} |
|
|
|
static int mxuport_attach(struct usb_serial *serial) |
|
{ |
|
struct usb_serial_port *port0 = serial->port[0]; |
|
struct usb_serial_port *port1 = serial->port[1]; |
|
int err; |
|
|
|
/* |
|
* All data from the ports is received on the first bulk in |
|
* endpoint, with a multiplex header. The second bulk in is |
|
* used for events. |
|
* |
|
* Start to read from the device. |
|
*/ |
|
err = usb_serial_generic_submit_read_urbs(port0, GFP_KERNEL); |
|
if (err) |
|
return err; |
|
|
|
err = usb_serial_generic_submit_read_urbs(port1, GFP_KERNEL); |
|
if (err) { |
|
usb_serial_generic_close(port0); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void mxuport_release(struct usb_serial *serial) |
|
{ |
|
struct usb_serial_port *port0 = serial->port[0]; |
|
struct usb_serial_port *port1 = serial->port[1]; |
|
|
|
usb_serial_generic_close(port1); |
|
usb_serial_generic_close(port0); |
|
} |
|
|
|
static int mxuport_open(struct tty_struct *tty, struct usb_serial_port *port) |
|
{ |
|
struct mxuport_port *mxport = usb_get_serial_port_data(port); |
|
struct usb_serial *serial = port->serial; |
|
int err; |
|
|
|
/* Set receive host (enable) */ |
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN, |
|
1, port->port_number); |
|
if (err) |
|
return err; |
|
|
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_OPEN, |
|
1, port->port_number); |
|
if (err) { |
|
mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN, |
|
0, port->port_number); |
|
return err; |
|
} |
|
|
|
/* Initial port termios */ |
|
if (tty) |
|
mxuport_set_termios(tty, port, NULL); |
|
|
|
/* |
|
* TODO: use RQ_VENDOR_GET_MSR, once we know what it |
|
* returns. |
|
*/ |
|
mxport->msr_state = 0; |
|
|
|
return err; |
|
} |
|
|
|
static void mxuport_close(struct usb_serial_port *port) |
|
{ |
|
struct usb_serial *serial = port->serial; |
|
|
|
mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_OPEN, 0, |
|
port->port_number); |
|
|
|
mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_RX_HOST_EN, 0, |
|
port->port_number); |
|
} |
|
|
|
/* Send a break to the port. */ |
|
static void mxuport_break_ctl(struct tty_struct *tty, int break_state) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct usb_serial *serial = port->serial; |
|
int enable; |
|
|
|
if (break_state == -1) { |
|
enable = 1; |
|
dev_dbg(&port->dev, "%s - sending break\n", __func__); |
|
} else { |
|
enable = 0; |
|
dev_dbg(&port->dev, "%s - clearing break\n", __func__); |
|
} |
|
|
|
mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_BREAK, |
|
enable, port->port_number); |
|
} |
|
|
|
static int mxuport_resume(struct usb_serial *serial) |
|
{ |
|
struct usb_serial_port *port; |
|
int c = 0; |
|
int i; |
|
int r; |
|
|
|
for (i = 0; i < 2; i++) { |
|
port = serial->port[i]; |
|
|
|
r = usb_serial_generic_submit_read_urbs(port, GFP_NOIO); |
|
if (r < 0) |
|
c++; |
|
} |
|
|
|
for (i = 0; i < serial->num_ports; i++) { |
|
port = serial->port[i]; |
|
if (!tty_port_initialized(&port->port)) |
|
continue; |
|
|
|
r = usb_serial_generic_write_start(port, GFP_NOIO); |
|
if (r < 0) |
|
c++; |
|
} |
|
|
|
return c ? -EIO : 0; |
|
} |
|
|
|
static struct usb_serial_driver mxuport_device = { |
|
.driver = { |
|
.owner = THIS_MODULE, |
|
.name = "mxuport", |
|
}, |
|
.description = "MOXA UPort", |
|
.id_table = mxuport_idtable, |
|
.num_bulk_in = 2, |
|
.num_bulk_out = 1, |
|
.probe = mxuport_probe, |
|
.port_probe = mxuport_port_probe, |
|
.attach = mxuport_attach, |
|
.release = mxuport_release, |
|
.calc_num_ports = mxuport_calc_num_ports, |
|
.open = mxuport_open, |
|
.close = mxuport_close, |
|
.set_termios = mxuport_set_termios, |
|
.break_ctl = mxuport_break_ctl, |
|
.tx_empty = mxuport_tx_empty, |
|
.tiocmiwait = usb_serial_generic_tiocmiwait, |
|
.get_icount = usb_serial_generic_get_icount, |
|
.throttle = mxuport_throttle, |
|
.unthrottle = mxuport_unthrottle, |
|
.tiocmget = mxuport_tiocmget, |
|
.tiocmset = mxuport_tiocmset, |
|
.dtr_rts = mxuport_dtr_rts, |
|
.process_read_urb = mxuport_process_read_urb, |
|
.prepare_write_buffer = mxuport_prepare_write_buffer, |
|
.resume = mxuport_resume, |
|
}; |
|
|
|
static struct usb_serial_driver *const serial_drivers[] = { |
|
&mxuport_device, NULL |
|
}; |
|
|
|
module_usb_serial_driver(serial_drivers, mxuport_idtable); |
|
|
|
MODULE_AUTHOR("Andrew Lunn <[email protected]>"); |
|
MODULE_AUTHOR("<[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|