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1108 lines
26 KiB
1108 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Fintek F81232 USB to serial adaptor driver |
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* Fintek F81532A/534A/535/536 USB to 2/4/8/12 serial adaptor driver |
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* |
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* Copyright (C) 2012 Greg Kroah-Hartman ([email protected]) |
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* Copyright (C) 2012 Linux Foundation |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/slab.h> |
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#include <linux/tty.h> |
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#include <linux/tty_driver.h> |
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#include <linux/tty_flip.h> |
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#include <linux/serial.h> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/mutex.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 <linux/serial_reg.h> |
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|
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#define F81232_ID \ |
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{ USB_DEVICE(0x1934, 0x0706) } /* 1 port UART device */ |
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|
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#define F81534A_SERIES_ID \ |
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{ USB_DEVICE(0x2c42, 0x1602) }, /* In-Box 2 port UART device */ \ |
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{ USB_DEVICE(0x2c42, 0x1604) }, /* In-Box 4 port UART device */ \ |
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{ USB_DEVICE(0x2c42, 0x1605) }, /* In-Box 8 port UART device */ \ |
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{ USB_DEVICE(0x2c42, 0x1606) }, /* In-Box 12 port UART device */ \ |
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{ USB_DEVICE(0x2c42, 0x1608) }, /* Non-Flash type */ \ |
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{ USB_DEVICE(0x2c42, 0x1632) }, /* 2 port UART device */ \ |
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{ USB_DEVICE(0x2c42, 0x1634) }, /* 4 port UART device */ \ |
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{ USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \ |
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{ USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */ |
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|
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#define F81534A_CTRL_ID \ |
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{ USB_DEVICE(0x2c42, 0x16f8) } /* Global control device */ |
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|
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static const struct usb_device_id f81232_id_table[] = { |
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F81232_ID, |
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{ } /* Terminating entry */ |
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}; |
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|
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static const struct usb_device_id f81534a_id_table[] = { |
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F81534A_SERIES_ID, |
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{ } /* Terminating entry */ |
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}; |
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|
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static const struct usb_device_id f81534a_ctrl_id_table[] = { |
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F81534A_CTRL_ID, |
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{ } /* Terminating entry */ |
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}; |
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|
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static const struct usb_device_id combined_id_table[] = { |
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F81232_ID, |
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F81534A_SERIES_ID, |
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F81534A_CTRL_ID, |
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{ } /* Terminating entry */ |
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}; |
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MODULE_DEVICE_TABLE(usb, combined_id_table); |
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|
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/* Maximum baudrate for F81232 */ |
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#define F81232_MAX_BAUDRATE 1500000 |
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#define F81232_DEF_BAUDRATE 9600 |
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|
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/* USB Control EP parameter */ |
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#define F81232_REGISTER_REQUEST 0xa0 |
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#define F81232_GET_REGISTER 0xc0 |
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#define F81232_SET_REGISTER 0x40 |
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#define F81534A_ACCESS_REG_RETRY 2 |
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|
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#define SERIAL_BASE_ADDRESS 0x0120 |
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#define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS) |
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#define INTERRUPT_ENABLE_REGISTER (0x01 + SERIAL_BASE_ADDRESS) |
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#define FIFO_CONTROL_REGISTER (0x02 + SERIAL_BASE_ADDRESS) |
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#define LINE_CONTROL_REGISTER (0x03 + SERIAL_BASE_ADDRESS) |
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#define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS) |
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#define LINE_STATUS_REGISTER (0x05 + SERIAL_BASE_ADDRESS) |
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#define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS) |
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|
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/* |
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* F81232 Clock registers (106h) |
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* |
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* Bit1-0: Clock source selector |
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* 00: 1.846MHz. |
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* 01: 18.46MHz. |
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* 10: 24MHz. |
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* 11: 14.77MHz. |
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*/ |
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#define F81232_CLK_REGISTER 0x106 |
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#define F81232_CLK_1_846_MHZ 0 |
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#define F81232_CLK_18_46_MHZ BIT(0) |
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#define F81232_CLK_24_MHZ BIT(1) |
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#define F81232_CLK_14_77_MHZ (BIT(1) | BIT(0)) |
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#define F81232_CLK_MASK GENMASK(1, 0) |
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|
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#define F81534A_MODE_REG 0x107 |
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#define F81534A_TRIGGER_MASK GENMASK(3, 2) |
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#define F81534A_TRIGGER_MULTIPLE_4X BIT(3) |
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#define F81534A_FIFO_128BYTE (BIT(1) | BIT(0)) |
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|
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/* Serial port self GPIO control, 2bytes [control&output data][input data] */ |
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#define F81534A_GPIO_REG 0x10e |
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#define F81534A_GPIO_MODE2_DIR BIT(6) /* 1: input, 0: output */ |
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#define F81534A_GPIO_MODE1_DIR BIT(5) |
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#define F81534A_GPIO_MODE0_DIR BIT(4) |
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#define F81534A_GPIO_MODE2_OUTPUT BIT(2) |
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#define F81534A_GPIO_MODE1_OUTPUT BIT(1) |
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#define F81534A_GPIO_MODE0_OUTPUT BIT(0) |
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|
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#define F81534A_CTRL_CMD_ENABLE_PORT 0x116 |
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|
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struct f81232_private { |
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struct mutex lock; |
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u8 modem_control; |
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u8 modem_status; |
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u8 shadow_lcr; |
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speed_t baud_base; |
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struct work_struct lsr_work; |
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struct work_struct interrupt_work; |
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struct usb_serial_port *port; |
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}; |
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|
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static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 }; |
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static u8 const clock_table[] = { F81232_CLK_1_846_MHZ, F81232_CLK_14_77_MHZ, |
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F81232_CLK_18_46_MHZ, F81232_CLK_24_MHZ }; |
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|
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static int calc_baud_divisor(speed_t baudrate, speed_t clockrate) |
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{ |
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if (!baudrate) |
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return 0; |
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|
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return DIV_ROUND_CLOSEST(clockrate, baudrate); |
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} |
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|
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static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val) |
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{ |
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int status; |
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u8 *tmp; |
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struct usb_device *dev = port->serial->dev; |
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|
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tmp = kmalloc(sizeof(*val), GFP_KERNEL); |
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if (!tmp) |
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return -ENOMEM; |
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|
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status = usb_control_msg(dev, |
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usb_rcvctrlpipe(dev, 0), |
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F81232_REGISTER_REQUEST, |
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F81232_GET_REGISTER, |
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reg, |
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0, |
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tmp, |
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sizeof(*val), |
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USB_CTRL_GET_TIMEOUT); |
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if (status != sizeof(*val)) { |
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dev_err(&port->dev, "%s failed status: %d\n", __func__, status); |
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|
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if (status < 0) |
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status = usb_translate_errors(status); |
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else |
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status = -EIO; |
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} else { |
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status = 0; |
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*val = *tmp; |
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} |
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|
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kfree(tmp); |
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return status; |
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} |
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|
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static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val) |
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{ |
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int status; |
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u8 *tmp; |
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struct usb_device *dev = port->serial->dev; |
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|
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tmp = kmalloc(sizeof(val), GFP_KERNEL); |
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if (!tmp) |
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return -ENOMEM; |
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|
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*tmp = val; |
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|
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status = usb_control_msg(dev, |
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usb_sndctrlpipe(dev, 0), |
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F81232_REGISTER_REQUEST, |
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F81232_SET_REGISTER, |
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reg, |
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0, |
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tmp, |
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sizeof(val), |
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USB_CTRL_SET_TIMEOUT); |
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if (status < 0) { |
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dev_err(&port->dev, "%s failed status: %d\n", __func__, status); |
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status = usb_translate_errors(status); |
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} else { |
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status = 0; |
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} |
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|
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kfree(tmp); |
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return status; |
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} |
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|
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static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg, |
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u8 mask, u8 val) |
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{ |
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int status; |
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u8 tmp; |
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|
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status = f81232_get_register(port, reg, &tmp); |
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if (status) |
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return status; |
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|
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tmp = (tmp & ~mask) | (val & mask); |
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|
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return f81232_set_register(port, reg, tmp); |
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} |
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|
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static void f81232_read_msr(struct usb_serial_port *port) |
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{ |
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int status; |
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u8 current_msr; |
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struct tty_struct *tty; |
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struct f81232_private *priv = usb_get_serial_port_data(port); |
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|
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mutex_lock(&priv->lock); |
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status = f81232_get_register(port, MODEM_STATUS_REGISTER, |
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¤t_msr); |
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if (status) { |
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dev_err(&port->dev, "%s fail, status: %d\n", __func__, status); |
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mutex_unlock(&priv->lock); |
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return; |
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} |
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|
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if (!(current_msr & UART_MSR_ANY_DELTA)) { |
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mutex_unlock(&priv->lock); |
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return; |
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} |
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priv->modem_status = current_msr; |
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|
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if (current_msr & UART_MSR_DCTS) |
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port->icount.cts++; |
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if (current_msr & UART_MSR_DDSR) |
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port->icount.dsr++; |
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if (current_msr & UART_MSR_TERI) |
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port->icount.rng++; |
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if (current_msr & UART_MSR_DDCD) { |
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port->icount.dcd++; |
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tty = tty_port_tty_get(&port->port); |
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if (tty) { |
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usb_serial_handle_dcd_change(port, tty, |
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current_msr & UART_MSR_DCD); |
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|
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tty_kref_put(tty); |
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} |
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} |
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wake_up_interruptible(&port->port.delta_msr_wait); |
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mutex_unlock(&priv->lock); |
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} |
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|
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static int f81232_set_mctrl(struct usb_serial_port *port, |
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unsigned int set, unsigned int clear) |
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{ |
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u8 val; |
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int status; |
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struct f81232_private *priv = usb_get_serial_port_data(port); |
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|
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if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) |
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return 0; /* no change */ |
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|
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/* 'set' takes precedence over 'clear' */ |
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clear &= ~set; |
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|
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/* force enable interrupt with OUT2 */ |
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mutex_lock(&priv->lock); |
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val = UART_MCR_OUT2 | priv->modem_control; |
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|
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if (clear & TIOCM_DTR) |
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val &= ~UART_MCR_DTR; |
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|
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if (clear & TIOCM_RTS) |
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val &= ~UART_MCR_RTS; |
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|
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if (set & TIOCM_DTR) |
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val |= UART_MCR_DTR; |
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|
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if (set & TIOCM_RTS) |
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val |= UART_MCR_RTS; |
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dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__, |
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val, priv->modem_control); |
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status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val); |
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if (status) { |
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dev_err(&port->dev, "%s set MCR status < 0\n", __func__); |
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mutex_unlock(&priv->lock); |
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return status; |
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} |
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priv->modem_control = val; |
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mutex_unlock(&priv->lock); |
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return 0; |
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} |
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static void f81232_update_line_status(struct usb_serial_port *port, |
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unsigned char *data, |
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size_t actual_length) |
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{ |
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struct f81232_private *priv = usb_get_serial_port_data(port); |
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|
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if (!actual_length) |
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return; |
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|
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switch (data[0] & 0x07) { |
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case 0x00: /* msr change */ |
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dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]); |
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schedule_work(&priv->interrupt_work); |
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break; |
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case 0x02: /* tx-empty */ |
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break; |
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case 0x04: /* rx data available */ |
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break; |
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case 0x06: /* lsr change */ |
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/* we can forget it. the LSR will read from bulk-in */ |
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dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]); |
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break; |
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} |
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} |
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static void f81232_read_int_callback(struct urb *urb) |
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{ |
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struct usb_serial_port *port = urb->context; |
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unsigned char *data = urb->transfer_buffer; |
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unsigned int actual_length = urb->actual_length; |
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int status = urb->status; |
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int retval; |
|
|
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switch (status) { |
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case 0: |
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/* success */ |
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break; |
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case -ECONNRESET: |
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case -ENOENT: |
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case -ESHUTDOWN: |
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/* this urb is terminated, clean up */ |
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dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
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__func__, status); |
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return; |
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default: |
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dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
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__func__, status); |
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goto exit; |
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} |
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|
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usb_serial_debug_data(&port->dev, __func__, |
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urb->actual_length, urb->transfer_buffer); |
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|
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f81232_update_line_status(port, data, actual_length); |
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|
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exit: |
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retval = usb_submit_urb(urb, GFP_ATOMIC); |
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if (retval) |
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dev_err(&urb->dev->dev, |
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"%s - usb_submit_urb failed with result %d\n", |
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__func__, retval); |
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} |
|
|
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static char f81232_handle_lsr(struct usb_serial_port *port, u8 lsr) |
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{ |
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struct f81232_private *priv = usb_get_serial_port_data(port); |
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char tty_flag = TTY_NORMAL; |
|
|
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if (!(lsr & UART_LSR_BRK_ERROR_BITS)) |
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return tty_flag; |
|
|
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if (lsr & UART_LSR_BI) { |
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tty_flag = TTY_BREAK; |
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port->icount.brk++; |
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usb_serial_handle_break(port); |
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} else if (lsr & UART_LSR_PE) { |
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tty_flag = TTY_PARITY; |
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port->icount.parity++; |
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} else if (lsr & UART_LSR_FE) { |
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tty_flag = TTY_FRAME; |
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port->icount.frame++; |
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} |
|
|
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if (lsr & UART_LSR_OE) { |
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port->icount.overrun++; |
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schedule_work(&priv->lsr_work); |
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tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
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} |
|
|
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return tty_flag; |
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} |
|
|
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static void f81232_process_read_urb(struct urb *urb) |
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{ |
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struct usb_serial_port *port = urb->context; |
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unsigned char *data = urb->transfer_buffer; |
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char tty_flag; |
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unsigned int i; |
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u8 lsr; |
|
|
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/* |
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* When opening the port we get a 1-byte packet with the current LSR, |
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* which we discard. |
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*/ |
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if ((urb->actual_length < 2) || (urb->actual_length % 2)) |
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return; |
|
|
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/* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */ |
|
|
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for (i = 0; i < urb->actual_length; i += 2) { |
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lsr = data[i]; |
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tty_flag = f81232_handle_lsr(port, lsr); |
|
|
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if (port->sysrq) { |
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if (usb_serial_handle_sysrq_char(port, data[i + 1])) |
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continue; |
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} |
|
|
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tty_insert_flip_char(&port->port, data[i + 1], tty_flag); |
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} |
|
|
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tty_flip_buffer_push(&port->port); |
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} |
|
|
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static void f81534a_process_read_urb(struct urb *urb) |
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{ |
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struct usb_serial_port *port = urb->context; |
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unsigned char *data = urb->transfer_buffer; |
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char tty_flag; |
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unsigned int i; |
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u8 lsr; |
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u8 len; |
|
|
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if (urb->actual_length < 3) { |
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dev_err(&port->dev, "short message received: %d\n", |
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urb->actual_length); |
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return; |
|
} |
|
|
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len = data[0]; |
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if (len != urb->actual_length) { |
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dev_err(&port->dev, "malformed message received: %d (%d)\n", |
|
urb->actual_length, len); |
|
return; |
|
} |
|
|
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/* bulk-in data: [LEN][Data.....][LSR] */ |
|
lsr = data[len - 1]; |
|
tty_flag = f81232_handle_lsr(port, lsr); |
|
|
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if (port->sysrq) { |
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for (i = 1; i < len - 1; ++i) { |
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if (!usb_serial_handle_sysrq_char(port, data[i])) { |
|
tty_insert_flip_char(&port->port, data[i], |
|
tty_flag); |
|
} |
|
} |
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} else { |
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tty_insert_flip_string_fixed_flag(&port->port, &data[1], |
|
tty_flag, len - 2); |
|
} |
|
|
|
tty_flip_buffer_push(&port->port); |
|
} |
|
|
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static void f81232_break_ctl(struct tty_struct *tty, int break_state) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct f81232_private *priv = usb_get_serial_port_data(port); |
|
int status; |
|
|
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mutex_lock(&priv->lock); |
|
|
|
if (break_state) |
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priv->shadow_lcr |= UART_LCR_SBC; |
|
else |
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priv->shadow_lcr &= ~UART_LCR_SBC; |
|
|
|
status = f81232_set_register(port, LINE_CONTROL_REGISTER, |
|
priv->shadow_lcr); |
|
if (status) |
|
dev_err(&port->dev, "set break failed: %d\n", status); |
|
|
|
mutex_unlock(&priv->lock); |
|
} |
|
|
|
static int f81232_find_clk(speed_t baudrate) |
|
{ |
|
int idx; |
|
|
|
for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) { |
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if (baudrate <= baudrate_table[idx] && |
|
baudrate_table[idx] % baudrate == 0) |
|
return idx; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static void f81232_set_baudrate(struct tty_struct *tty, |
|
struct usb_serial_port *port, speed_t baudrate, |
|
speed_t old_baudrate) |
|
{ |
|
struct f81232_private *priv = usb_get_serial_port_data(port); |
|
u8 lcr; |
|
int divisor; |
|
int status = 0; |
|
int i; |
|
int idx; |
|
speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE }; |
|
|
|
for (i = 0; i < ARRAY_SIZE(baud_list); ++i) { |
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idx = f81232_find_clk(baud_list[i]); |
|
if (idx >= 0) { |
|
baudrate = baud_list[i]; |
|
tty_encode_baud_rate(tty, baudrate, baudrate); |
|
break; |
|
} |
|
} |
|
|
|
if (idx < 0) |
|
return; |
|
|
|
priv->baud_base = baudrate_table[idx]; |
|
divisor = calc_baud_divisor(baudrate, priv->baud_base); |
|
|
|
status = f81232_set_mask_register(port, F81232_CLK_REGISTER, |
|
F81232_CLK_MASK, clock_table[idx]); |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set CLK_REG: %d\n", |
|
__func__, status); |
|
return; |
|
} |
|
|
|
status = f81232_get_register(port, LINE_CONTROL_REGISTER, |
|
&lcr); /* get LCR */ |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to get LCR: %d\n", |
|
__func__, status); |
|
return; |
|
} |
|
|
|
status = f81232_set_register(port, LINE_CONTROL_REGISTER, |
|
lcr | UART_LCR_DLAB); /* Enable DLAB */ |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set DLAB: %d\n", |
|
__func__, status); |
|
return; |
|
} |
|
|
|
status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER, |
|
divisor & 0x00ff); /* low */ |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n", |
|
__func__, status); |
|
goto reapply_lcr; |
|
} |
|
|
|
status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, |
|
(divisor & 0xff00) >> 8); /* high */ |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n", |
|
__func__, status); |
|
} |
|
|
|
reapply_lcr: |
|
status = f81232_set_register(port, LINE_CONTROL_REGISTER, |
|
lcr & ~UART_LCR_DLAB); |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set DLAB: %d\n", |
|
__func__, status); |
|
} |
|
} |
|
|
|
static int f81232_port_enable(struct usb_serial_port *port) |
|
{ |
|
u8 val; |
|
int status; |
|
|
|
/* fifo on, trigger8, clear TX/RX*/ |
|
val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | |
|
UART_FCR_CLEAR_XMIT; |
|
|
|
status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val); |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set FCR: %d\n", |
|
__func__, status); |
|
return status; |
|
} |
|
|
|
/* MSR Interrupt only, LSR will read from Bulk-in odd byte */ |
|
status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, |
|
UART_IER_MSI); |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set IER: %d\n", |
|
__func__, status); |
|
return status; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int f81232_port_disable(struct usb_serial_port *port) |
|
{ |
|
int status; |
|
|
|
status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0); |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set IER: %d\n", |
|
__func__, status); |
|
return status; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void f81232_set_termios(struct tty_struct *tty, |
|
struct usb_serial_port *port, struct ktermios *old_termios) |
|
{ |
|
struct f81232_private *priv = usb_get_serial_port_data(port); |
|
u8 new_lcr = 0; |
|
int status = 0; |
|
speed_t baudrate; |
|
speed_t old_baud; |
|
|
|
/* Don't change anything if nothing has changed */ |
|
if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) |
|
return; |
|
|
|
if (C_BAUD(tty) == B0) |
|
f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); |
|
else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) |
|
f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); |
|
|
|
baudrate = tty_get_baud_rate(tty); |
|
if (baudrate > 0) { |
|
if (old_termios) |
|
old_baud = tty_termios_baud_rate(old_termios); |
|
else |
|
old_baud = F81232_DEF_BAUDRATE; |
|
|
|
f81232_set_baudrate(tty, port, baudrate, old_baud); |
|
} |
|
|
|
if (C_PARENB(tty)) { |
|
new_lcr |= UART_LCR_PARITY; |
|
|
|
if (!C_PARODD(tty)) |
|
new_lcr |= UART_LCR_EPAR; |
|
|
|
if (C_CMSPAR(tty)) |
|
new_lcr |= UART_LCR_SPAR; |
|
} |
|
|
|
if (C_CSTOPB(tty)) |
|
new_lcr |= UART_LCR_STOP; |
|
|
|
switch (C_CSIZE(tty)) { |
|
case CS5: |
|
new_lcr |= UART_LCR_WLEN5; |
|
break; |
|
case CS6: |
|
new_lcr |= UART_LCR_WLEN6; |
|
break; |
|
case CS7: |
|
new_lcr |= UART_LCR_WLEN7; |
|
break; |
|
default: |
|
case CS8: |
|
new_lcr |= UART_LCR_WLEN8; |
|
break; |
|
} |
|
|
|
mutex_lock(&priv->lock); |
|
|
|
new_lcr |= (priv->shadow_lcr & UART_LCR_SBC); |
|
status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr); |
|
if (status) { |
|
dev_err(&port->dev, "%s failed to set LCR: %d\n", |
|
__func__, status); |
|
} |
|
|
|
priv->shadow_lcr = new_lcr; |
|
|
|
mutex_unlock(&priv->lock); |
|
} |
|
|
|
static int f81232_tiocmget(struct tty_struct *tty) |
|
{ |
|
int r; |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct f81232_private *port_priv = usb_get_serial_port_data(port); |
|
u8 mcr, msr; |
|
|
|
/* force get current MSR changed state */ |
|
f81232_read_msr(port); |
|
|
|
mutex_lock(&port_priv->lock); |
|
mcr = port_priv->modem_control; |
|
msr = port_priv->modem_status; |
|
mutex_unlock(&port_priv->lock); |
|
|
|
r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) | |
|
(mcr & UART_MCR_RTS ? TIOCM_RTS : 0) | |
|
(msr & UART_MSR_CTS ? TIOCM_CTS : 0) | |
|
(msr & UART_MSR_DCD ? TIOCM_CAR : 0) | |
|
(msr & UART_MSR_RI ? TIOCM_RI : 0) | |
|
(msr & UART_MSR_DSR ? TIOCM_DSR : 0); |
|
|
|
return r; |
|
} |
|
|
|
static int f81232_tiocmset(struct tty_struct *tty, |
|
unsigned int set, unsigned int clear) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
|
|
return f81232_set_mctrl(port, set, clear); |
|
} |
|
|
|
static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port) |
|
{ |
|
int result; |
|
|
|
result = f81232_port_enable(port); |
|
if (result) |
|
return result; |
|
|
|
/* Setup termios */ |
|
if (tty) |
|
f81232_set_termios(tty, port, NULL); |
|
|
|
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
|
if (result) { |
|
dev_err(&port->dev, "%s - failed submitting interrupt urb," |
|
" error %d\n", __func__, result); |
|
return result; |
|
} |
|
|
|
result = usb_serial_generic_open(tty, port); |
|
if (result) { |
|
usb_kill_urb(port->interrupt_in_urb); |
|
return result; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port) |
|
{ |
|
int status; |
|
u8 mask; |
|
u8 val; |
|
|
|
val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE; |
|
mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE; |
|
|
|
status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val); |
|
if (status) { |
|
dev_err(&port->dev, "failed to set MODE_REG: %d\n", status); |
|
return status; |
|
} |
|
|
|
return f81232_open(tty, port); |
|
} |
|
|
|
static void f81232_close(struct usb_serial_port *port) |
|
{ |
|
struct f81232_private *port_priv = usb_get_serial_port_data(port); |
|
|
|
f81232_port_disable(port); |
|
usb_serial_generic_close(port); |
|
usb_kill_urb(port->interrupt_in_urb); |
|
flush_work(&port_priv->interrupt_work); |
|
flush_work(&port_priv->lsr_work); |
|
} |
|
|
|
static void f81232_dtr_rts(struct usb_serial_port *port, int on) |
|
{ |
|
if (on) |
|
f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); |
|
else |
|
f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); |
|
} |
|
|
|
static bool f81232_tx_empty(struct usb_serial_port *port) |
|
{ |
|
int status; |
|
u8 tmp; |
|
|
|
status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); |
|
if (!status) { |
|
if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT) |
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static int f81232_carrier_raised(struct usb_serial_port *port) |
|
{ |
|
u8 msr; |
|
struct f81232_private *priv = usb_get_serial_port_data(port); |
|
|
|
mutex_lock(&priv->lock); |
|
msr = priv->modem_status; |
|
mutex_unlock(&priv->lock); |
|
|
|
if (msr & UART_MSR_DCD) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
static int f81232_get_serial_info(struct tty_struct *tty, |
|
struct serial_struct *ss) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct f81232_private *priv = usb_get_serial_port_data(port); |
|
|
|
ss->type = PORT_16550A; |
|
ss->line = port->minor; |
|
ss->port = port->port_number; |
|
ss->baud_base = priv->baud_base; |
|
return 0; |
|
} |
|
|
|
static void f81232_interrupt_work(struct work_struct *work) |
|
{ |
|
struct f81232_private *priv = |
|
container_of(work, struct f81232_private, interrupt_work); |
|
|
|
f81232_read_msr(priv->port); |
|
} |
|
|
|
static void f81232_lsr_worker(struct work_struct *work) |
|
{ |
|
struct f81232_private *priv; |
|
struct usb_serial_port *port; |
|
int status; |
|
u8 tmp; |
|
|
|
priv = container_of(work, struct f81232_private, lsr_work); |
|
port = priv->port; |
|
|
|
status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); |
|
if (status) |
|
dev_warn(&port->dev, "read LSR failed: %d\n", status); |
|
} |
|
|
|
static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg, |
|
u16 size, void *val) |
|
{ |
|
struct usb_device *dev = interface_to_usbdev(intf); |
|
int retry = F81534A_ACCESS_REG_RETRY; |
|
int status; |
|
u8 *tmp; |
|
|
|
tmp = kmemdup(val, size, GFP_KERNEL); |
|
if (!tmp) |
|
return -ENOMEM; |
|
|
|
while (retry--) { |
|
status = usb_control_msg(dev, |
|
usb_sndctrlpipe(dev, 0), |
|
F81232_REGISTER_REQUEST, |
|
F81232_SET_REGISTER, |
|
reg, |
|
0, |
|
tmp, |
|
size, |
|
USB_CTRL_SET_TIMEOUT); |
|
if (status < 0) { |
|
status = usb_translate_errors(status); |
|
if (status == -EIO) |
|
continue; |
|
} else { |
|
status = 0; |
|
} |
|
|
|
break; |
|
} |
|
|
|
if (status) { |
|
dev_err(&intf->dev, "failed to set register 0x%x: %d\n", |
|
reg, status); |
|
} |
|
|
|
kfree(tmp); |
|
return status; |
|
} |
|
|
|
static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en) |
|
{ |
|
unsigned char enable[2] = {0}; |
|
int status; |
|
|
|
/* |
|
* Enable all available serial ports, define as following: |
|
* bit 15 : Reset behavior (when HUB got soft reset) |
|
* 0: maintain all serial port enabled state. |
|
* 1: disable all serial port. |
|
* bit 0~11 : Serial port enable bit. |
|
*/ |
|
if (en) { |
|
enable[0] = 0xff; |
|
enable[1] = 0x8f; |
|
} |
|
|
|
status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT, |
|
sizeof(enable), enable); |
|
if (status) |
|
dev_err(&intf->dev, "failed to enable ports: %d\n", status); |
|
|
|
return status; |
|
} |
|
|
|
static int f81534a_ctrl_probe(struct usb_interface *intf, |
|
const struct usb_device_id *id) |
|
{ |
|
return f81534a_ctrl_enable_all_ports(intf, true); |
|
} |
|
|
|
static void f81534a_ctrl_disconnect(struct usb_interface *intf) |
|
{ |
|
f81534a_ctrl_enable_all_ports(intf, false); |
|
} |
|
|
|
static int f81534a_ctrl_resume(struct usb_interface *intf) |
|
{ |
|
return f81534a_ctrl_enable_all_ports(intf, true); |
|
} |
|
|
|
static int f81232_port_probe(struct usb_serial_port *port) |
|
{ |
|
struct f81232_private *priv; |
|
|
|
priv = devm_kzalloc(&port->dev, sizeof(*priv), GFP_KERNEL); |
|
if (!priv) |
|
return -ENOMEM; |
|
|
|
mutex_init(&priv->lock); |
|
INIT_WORK(&priv->interrupt_work, f81232_interrupt_work); |
|
INIT_WORK(&priv->lsr_work, f81232_lsr_worker); |
|
|
|
usb_set_serial_port_data(port, priv); |
|
|
|
port->port.drain_delay = 256; |
|
priv->port = port; |
|
|
|
return 0; |
|
} |
|
|
|
static int f81534a_port_probe(struct usb_serial_port *port) |
|
{ |
|
int status; |
|
|
|
/* tri-state with pull-high, default RS232 Mode */ |
|
status = f81232_set_register(port, F81534A_GPIO_REG, |
|
F81534A_GPIO_MODE2_DIR); |
|
if (status) |
|
return status; |
|
|
|
return f81232_port_probe(port); |
|
} |
|
|
|
static int f81232_suspend(struct usb_serial *serial, pm_message_t message) |
|
{ |
|
struct usb_serial_port *port = serial->port[0]; |
|
struct f81232_private *port_priv = usb_get_serial_port_data(port); |
|
int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
|
usb_kill_urb(port->read_urbs[i]); |
|
|
|
usb_kill_urb(port->interrupt_in_urb); |
|
|
|
if (port_priv) { |
|
flush_work(&port_priv->interrupt_work); |
|
flush_work(&port_priv->lsr_work); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int f81232_resume(struct usb_serial *serial) |
|
{ |
|
struct usb_serial_port *port = serial->port[0]; |
|
int result; |
|
|
|
if (tty_port_initialized(&port->port)) { |
|
result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); |
|
if (result) { |
|
dev_err(&port->dev, "submit interrupt urb failed: %d\n", |
|
result); |
|
return result; |
|
} |
|
} |
|
|
|
return usb_serial_generic_resume(serial); |
|
} |
|
|
|
static struct usb_serial_driver f81232_device = { |
|
.driver = { |
|
.owner = THIS_MODULE, |
|
.name = "f81232", |
|
}, |
|
.id_table = f81232_id_table, |
|
.num_ports = 1, |
|
.bulk_in_size = 256, |
|
.bulk_out_size = 256, |
|
.open = f81232_open, |
|
.close = f81232_close, |
|
.dtr_rts = f81232_dtr_rts, |
|
.carrier_raised = f81232_carrier_raised, |
|
.get_serial = f81232_get_serial_info, |
|
.break_ctl = f81232_break_ctl, |
|
.set_termios = f81232_set_termios, |
|
.tiocmget = f81232_tiocmget, |
|
.tiocmset = f81232_tiocmset, |
|
.tiocmiwait = usb_serial_generic_tiocmiwait, |
|
.tx_empty = f81232_tx_empty, |
|
.process_read_urb = f81232_process_read_urb, |
|
.read_int_callback = f81232_read_int_callback, |
|
.port_probe = f81232_port_probe, |
|
.suspend = f81232_suspend, |
|
.resume = f81232_resume, |
|
}; |
|
|
|
static struct usb_serial_driver f81534a_device = { |
|
.driver = { |
|
.owner = THIS_MODULE, |
|
.name = "f81534a", |
|
}, |
|
.id_table = f81534a_id_table, |
|
.num_ports = 1, |
|
.open = f81534a_open, |
|
.close = f81232_close, |
|
.dtr_rts = f81232_dtr_rts, |
|
.carrier_raised = f81232_carrier_raised, |
|
.get_serial = f81232_get_serial_info, |
|
.break_ctl = f81232_break_ctl, |
|
.set_termios = f81232_set_termios, |
|
.tiocmget = f81232_tiocmget, |
|
.tiocmset = f81232_tiocmset, |
|
.tiocmiwait = usb_serial_generic_tiocmiwait, |
|
.tx_empty = f81232_tx_empty, |
|
.process_read_urb = f81534a_process_read_urb, |
|
.read_int_callback = f81232_read_int_callback, |
|
.port_probe = f81534a_port_probe, |
|
.suspend = f81232_suspend, |
|
.resume = f81232_resume, |
|
}; |
|
|
|
static struct usb_serial_driver * const serial_drivers[] = { |
|
&f81232_device, |
|
&f81534a_device, |
|
NULL, |
|
}; |
|
|
|
static struct usb_driver f81534a_ctrl_driver = { |
|
.name = "f81534a_ctrl", |
|
.id_table = f81534a_ctrl_id_table, |
|
.probe = f81534a_ctrl_probe, |
|
.disconnect = f81534a_ctrl_disconnect, |
|
.resume = f81534a_ctrl_resume, |
|
}; |
|
|
|
static int __init f81232_init(void) |
|
{ |
|
int status; |
|
|
|
status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE, |
|
KBUILD_MODNAME); |
|
if (status) |
|
return status; |
|
|
|
status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, |
|
combined_id_table); |
|
if (status) { |
|
usb_deregister(&f81534a_ctrl_driver); |
|
return status; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void __exit f81232_exit(void) |
|
{ |
|
usb_serial_deregister_drivers(serial_drivers); |
|
usb_deregister(&f81534a_ctrl_driver); |
|
} |
|
|
|
module_init(f81232_init); |
|
module_exit(f81232_exit); |
|
|
|
MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver"); |
|
MODULE_AUTHOR("Greg Kroah-Hartman <[email protected]>"); |
|
MODULE_AUTHOR("Peter Hong <[email protected]>"); |
|
MODULE_LICENSE("GPL v2");
|
|
|