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803a536243
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1394 lines
34 KiB
C
1394 lines
34 KiB
C
/*
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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 <andrew@lunn.ch>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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#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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/* 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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/* 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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/* 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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/* 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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#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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#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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#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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#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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#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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#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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#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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#define RQ_VENDOR_GET_MSR 0x86 /* Get modem status register */
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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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/* 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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/* Definitions for modem control event type */
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#define SERIAL_EV_XOFF 0x40 /* XOFF received */
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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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#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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#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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#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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#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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/* 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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/* 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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/* 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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* 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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if (status != size) {
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dev_err(&serial->interface->dev,
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"%s - short write (%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 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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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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* 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->port.console || !port->sysrq) {
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tty_insert_flip_string(&port->port, data, size);
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} else {
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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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}
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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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if (rcv_msr_event == 0)
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return;
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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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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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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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if (rcv_msr_event &
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(SERIAL_EV_CTS | SERIAL_EV_DSR | SERIAL_EV_RLSD)) {
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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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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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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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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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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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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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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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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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* 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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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.
|
|
* Not currently used.
|
|
*/
|
|
break;
|
|
case UPORT_EVENT_MSR:
|
|
mxuport_msr_event(port, buf);
|
|
break;
|
|
case UPORT_EVENT_LSR:
|
|
mxuport_lsr_event(port, buf);
|
|
break;
|
|
case UPORT_EVENT_MCR:
|
|
/*
|
|
* Event to indicate a change in XON/XOFF from the
|
|
* peer. Currently not used. We just continue
|
|
* sending the device data and it will buffer it if
|
|
* needed. This event could be used for flow control
|
|
* between the host and the device.
|
|
*/
|
|
break;
|
|
default:
|
|
dev_dbg(&port->dev, "Unexpected event\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* One URB can contain data for multiple ports. Demultiplex the data,
|
|
* checking the port exists, is opened and the message is valid.
|
|
*/
|
|
static void mxuport_process_read_urb_demux_data(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_len;
|
|
|
|
while (data < end) {
|
|
if (data + HEADER_SIZE > end) {
|
|
dev_warn(&port->dev, "%s - message with short header\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];
|
|
rcv_len = get_unaligned_be16(data + 2);
|
|
if (!rcv_len || data + HEADER_SIZE + rcv_len > end) {
|
|
dev_warn(&port->dev, "%s - short data\n", __func__);
|
|
return;
|
|
}
|
|
|
|
if (test_bit(ASYNCB_INITIALIZED, &demux_port->port.flags)) {
|
|
ch = data + HEADER_SIZE;
|
|
mxuport_process_read_urb_data(demux_port, ch, rcv_len);
|
|
} else {
|
|
dev_dbg(&demux_port->dev, "%s - data for closed port\n",
|
|
__func__);
|
|
}
|
|
data += HEADER_SIZE + rcv_len;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* One URB can contain events for multiple ports. Demultiplex the event,
|
|
* checking the port exists, and is opened.
|
|
*/
|
|
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 (test_bit(ASYNCB_INITIALIZED, &demux_port->port.flags)) {
|
|
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)
|
|
{
|
|
unsigned long features = (unsigned long)usb_get_serial_data(serial);
|
|
|
|
if (features & MX_UPORT_2_PORT)
|
|
return 2;
|
|
if (features & MX_UPORT_4_PORT)
|
|
return 4;
|
|
if (features & MX_UPORT_8_PORT)
|
|
return 8;
|
|
if (features & MX_UPORT_16_PORT)
|
|
return 16;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 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) */
|
|
err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_INTERFACE,
|
|
MX_INT_RS232,
|
|
port->port_number);
|
|
if (err)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mxuport_alloc_write_urb(struct usb_serial *serial,
|
|
struct usb_serial_port *port,
|
|
struct usb_serial_port *port0,
|
|
int j)
|
|
{
|
|
struct usb_device *dev = interface_to_usbdev(serial->interface);
|
|
|
|
set_bit(j, &port->write_urbs_free);
|
|
port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!port->write_urbs[j])
|
|
return -ENOMEM;
|
|
|
|
port->bulk_out_buffers[j] = kmalloc(port0->bulk_out_size, GFP_KERNEL);
|
|
if (!port->bulk_out_buffers[j])
|
|
return -ENOMEM;
|
|
|
|
usb_fill_bulk_urb(port->write_urbs[j], dev,
|
|
usb_sndbulkpipe(dev, port->bulk_out_endpointAddress),
|
|
port->bulk_out_buffers[j],
|
|
port->bulk_out_size,
|
|
serial->type->write_bulk_callback,
|
|
port);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int mxuport_alloc_write_urbs(struct usb_serial *serial,
|
|
struct usb_serial_port *port,
|
|
struct usb_serial_port *port0)
|
|
{
|
|
int j;
|
|
int ret;
|
|
|
|
for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {
|
|
ret = mxuport_alloc_write_urb(serial, port, port0, j);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int mxuport_attach(struct usb_serial *serial)
|
|
{
|
|
struct usb_serial_port *port0 = serial->port[0];
|
|
struct usb_serial_port *port1 = serial->port[1];
|
|
struct usb_serial_port *port;
|
|
int err;
|
|
int i;
|
|
int j;
|
|
|
|
/*
|
|
* Throw away all but the first allocated write URBs so we can
|
|
* set them up again to fit the multiplexing scheme.
|
|
*/
|
|
for (i = 1; i < serial->num_bulk_out; ++i) {
|
|
port = serial->port[i];
|
|
for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {
|
|
usb_free_urb(port->write_urbs[j]);
|
|
kfree(port->bulk_out_buffers[j]);
|
|
port->write_urbs[j] = NULL;
|
|
port->bulk_out_buffers[j] = NULL;
|
|
}
|
|
port->write_urbs_free = 0;
|
|
}
|
|
|
|
/*
|
|
* All write data is sent over the first bulk out endpoint,
|
|
* with an added header to indicate the port. Allocate URBs
|
|
* for each port to the first bulk out endpoint.
|
|
*/
|
|
for (i = 1; i < serial->num_ports; ++i) {
|
|
port = serial->port[i];
|
|
port->bulk_out_size = port0->bulk_out_size;
|
|
port->bulk_out_endpointAddress =
|
|
port0->bulk_out_endpointAddress;
|
|
|
|
err = mxuport_alloc_write_urbs(serial, port, port0);
|
|
if (err)
|
|
return err;
|
|
|
|
port->write_urb = port->write_urbs[0];
|
|
port->bulk_out_buffer = port->bulk_out_buffers[0];
|
|
|
|
/*
|
|
* Ensure each port has a fifo. The framework only
|
|
* allocates a fifo to ports with a bulk out endpoint,
|
|
* where as we need one for every port.
|
|
*/
|
|
if (!kfifo_initialized(&port->write_fifo)) {
|
|
err = kfifo_alloc(&port->write_fifo, PAGE_SIZE,
|
|
GFP_KERNEL);
|
|
if (err)
|
|
return 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 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 */
|
|
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 (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
|
|
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_ports = 0,
|
|
.probe = mxuport_probe,
|
|
.port_probe = mxuport_port_probe,
|
|
.attach = mxuport_attach,
|
|
.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 <andrew@lunn.ch>");
|
|
MODULE_AUTHOR("<support@moxa.com>");
|
|
MODULE_LICENSE("GPL");
|