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1591 lines
40 KiB
1591 lines
40 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* F81532/F81534 USB to Serial Ports Bridge |
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* |
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* F81532 => 2 Serial Ports |
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* F81534 => 4 Serial Ports |
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* |
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* Copyright (C) 2016 Feature Integration Technology Inc., (Fintek) |
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* Copyright (C) 2016 Tom Tsai ([email protected]) |
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* Copyright (C) 2016 Peter Hong ([email protected]) |
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* |
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* The F81532/F81534 had 1 control endpoint for setting, 1 endpoint bulk-out |
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* for all serial port TX and 1 endpoint bulk-in for all serial port read in |
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* (Read Data/MSR/LSR). |
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* |
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* Write URB is fixed with 512bytes, per serial port used 128Bytes. |
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* It can be described by f81534_prepare_write_buffer() |
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* |
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* Read URB is 512Bytes max, per serial port used 128Bytes. |
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* It can be described by f81534_process_read_urb() and maybe received with |
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* 128x1,2,3,4 bytes. |
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* |
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*/ |
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#include <linux/slab.h> |
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#include <linux/tty.h> |
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#include <linux/tty_flip.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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#include <linux/module.h> |
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#include <linux/uaccess.h> |
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|
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/* Serial Port register Address */ |
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#define F81534_UART_BASE_ADDRESS 0x1200 |
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#define F81534_UART_OFFSET 0x10 |
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#define F81534_DIVISOR_LSB_REG (0x00 + F81534_UART_BASE_ADDRESS) |
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#define F81534_DIVISOR_MSB_REG (0x01 + F81534_UART_BASE_ADDRESS) |
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#define F81534_INTERRUPT_ENABLE_REG (0x01 + F81534_UART_BASE_ADDRESS) |
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#define F81534_FIFO_CONTROL_REG (0x02 + F81534_UART_BASE_ADDRESS) |
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#define F81534_LINE_CONTROL_REG (0x03 + F81534_UART_BASE_ADDRESS) |
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#define F81534_MODEM_CONTROL_REG (0x04 + F81534_UART_BASE_ADDRESS) |
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#define F81534_LINE_STATUS_REG (0x05 + F81534_UART_BASE_ADDRESS) |
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#define F81534_MODEM_STATUS_REG (0x06 + F81534_UART_BASE_ADDRESS) |
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#define F81534_CLOCK_REG (0x08 + F81534_UART_BASE_ADDRESS) |
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#define F81534_CONFIG1_REG (0x09 + F81534_UART_BASE_ADDRESS) |
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|
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#define F81534_DEF_CONF_ADDRESS_START 0x3000 |
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#define F81534_DEF_CONF_SIZE 12 |
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|
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#define F81534_CUSTOM_ADDRESS_START 0x2f00 |
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#define F81534_CUSTOM_DATA_SIZE 0x10 |
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#define F81534_CUSTOM_NO_CUSTOM_DATA 0xff |
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#define F81534_CUSTOM_VALID_TOKEN 0xf0 |
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#define F81534_CONF_OFFSET 1 |
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#define F81534_CONF_INIT_GPIO_OFFSET 4 |
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#define F81534_CONF_WORK_GPIO_OFFSET 8 |
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#define F81534_CONF_GPIO_SHUTDOWN 7 |
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#define F81534_CONF_GPIO_RS232 1 |
|
|
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#define F81534_MAX_DATA_BLOCK 64 |
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#define F81534_MAX_BUS_RETRY 20 |
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|
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/* Default URB timeout for USB operations */ |
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#define F81534_USB_MAX_RETRY 10 |
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#define F81534_USB_TIMEOUT 2000 |
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#define F81534_SET_GET_REGISTER 0xA0 |
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|
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#define F81534_NUM_PORT 4 |
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#define F81534_UNUSED_PORT 0xff |
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#define F81534_WRITE_BUFFER_SIZE 512 |
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|
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#define DRIVER_DESC "Fintek F81532/F81534" |
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#define FINTEK_VENDOR_ID_1 0x1934 |
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#define FINTEK_VENDOR_ID_2 0x2C42 |
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#define FINTEK_DEVICE_ID 0x1202 |
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#define F81534_MAX_TX_SIZE 124 |
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#define F81534_MAX_RX_SIZE 124 |
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#define F81534_RECEIVE_BLOCK_SIZE 128 |
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#define F81534_MAX_RECEIVE_BLOCK_SIZE 512 |
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|
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#define F81534_TOKEN_RECEIVE 0x01 |
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#define F81534_TOKEN_WRITE 0x02 |
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#define F81534_TOKEN_TX_EMPTY 0x03 |
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#define F81534_TOKEN_MSR_CHANGE 0x04 |
|
|
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/* |
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* We used interal SPI bus to access FLASH section. We must wait the SPI bus to |
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* idle if we performed any command. |
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* |
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* SPI Bus status register: F81534_BUS_REG_STATUS |
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* Bit 0/1 : BUSY |
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* Bit 2 : IDLE |
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*/ |
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#define F81534_BUS_BUSY (BIT(0) | BIT(1)) |
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#define F81534_BUS_IDLE BIT(2) |
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#define F81534_BUS_READ_DATA 0x1004 |
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#define F81534_BUS_REG_STATUS 0x1003 |
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#define F81534_BUS_REG_START 0x1002 |
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#define F81534_BUS_REG_END 0x1001 |
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|
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#define F81534_CMD_READ 0x03 |
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|
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#define F81534_DEFAULT_BAUD_RATE 9600 |
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|
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#define F81534_PORT_CONF_RS232 0 |
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#define F81534_PORT_CONF_RS485 BIT(0) |
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#define F81534_PORT_CONF_RS485_INVERT (BIT(0) | BIT(1)) |
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#define F81534_PORT_CONF_MODE_MASK GENMASK(1, 0) |
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#define F81534_PORT_CONF_DISABLE_PORT BIT(3) |
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#define F81534_PORT_CONF_NOT_EXIST_PORT BIT(7) |
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#define F81534_PORT_UNAVAILABLE \ |
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(F81534_PORT_CONF_DISABLE_PORT | F81534_PORT_CONF_NOT_EXIST_PORT) |
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|
|
|
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#define F81534_1X_RXTRIGGER 0xc3 |
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#define F81534_8X_RXTRIGGER 0xcf |
|
|
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/* |
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* F81532/534 Clock registers (offset +08h) |
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* |
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* Bit0: UART Enable (always on) |
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* Bit2-1: 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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* Bit4: Auto direction(RTS) control (RTS pin Low when TX) |
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* Bit5: Invert direction(RTS) when Bit4 enabled (RTS pin high when TX) |
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*/ |
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|
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#define F81534_UART_EN BIT(0) |
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#define F81534_CLK_1_846_MHZ 0 |
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#define F81534_CLK_18_46_MHZ BIT(1) |
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#define F81534_CLK_24_MHZ BIT(2) |
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#define F81534_CLK_14_77_MHZ (BIT(1) | BIT(2)) |
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#define F81534_CLK_MASK GENMASK(2, 1) |
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#define F81534_CLK_TX_DELAY_1BIT BIT(3) |
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#define F81534_CLK_RS485_MODE BIT(4) |
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#define F81534_CLK_RS485_INVERT BIT(5) |
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|
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static const struct usb_device_id f81534_id_table[] = { |
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{ USB_DEVICE(FINTEK_VENDOR_ID_1, FINTEK_DEVICE_ID) }, |
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{ USB_DEVICE(FINTEK_VENDOR_ID_2, FINTEK_DEVICE_ID) }, |
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{} /* Terminating entry */ |
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}; |
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|
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#define F81534_TX_EMPTY_BIT 0 |
|
|
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struct f81534_serial_private { |
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u8 conf_data[F81534_DEF_CONF_SIZE]; |
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int tty_idx[F81534_NUM_PORT]; |
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u8 setting_idx; |
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int opened_port; |
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struct mutex urb_mutex; |
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}; |
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|
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struct f81534_port_private { |
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struct mutex mcr_mutex; |
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struct mutex lcr_mutex; |
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struct work_struct lsr_work; |
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struct usb_serial_port *port; |
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unsigned long tx_empty; |
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spinlock_t msr_lock; |
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u32 baud_base; |
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u8 shadow_mcr; |
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u8 shadow_lcr; |
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u8 shadow_msr; |
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u8 shadow_clk; |
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u8 phy_num; |
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}; |
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|
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struct f81534_pin_data { |
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const u16 reg_addr; |
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const u8 reg_mask; |
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}; |
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|
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struct f81534_port_out_pin { |
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struct f81534_pin_data pin[3]; |
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}; |
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|
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/* Pin output value for M2/M1/M0(SD) */ |
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static const struct f81534_port_out_pin f81534_port_out_pins[] = { |
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{ { { 0x2ae8, BIT(7) }, { 0x2a90, BIT(5) }, { 0x2a90, BIT(4) } } }, |
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{ { { 0x2ae8, BIT(6) }, { 0x2ae8, BIT(0) }, { 0x2ae8, BIT(3) } } }, |
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{ { { 0x2a90, BIT(0) }, { 0x2ae8, BIT(2) }, { 0x2a80, BIT(6) } } }, |
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{ { { 0x2a90, BIT(3) }, { 0x2a90, BIT(2) }, { 0x2a90, BIT(1) } } }, |
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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[] = { F81534_CLK_1_846_MHZ, F81534_CLK_14_77_MHZ, |
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F81534_CLK_18_46_MHZ, F81534_CLK_24_MHZ }; |
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|
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static int f81534_logic_to_phy_port(struct usb_serial *serial, |
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struct usb_serial_port *port) |
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{ |
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struct f81534_serial_private *serial_priv = |
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usb_get_serial_data(port->serial); |
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int count = 0; |
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int i; |
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|
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for (i = 0; i < F81534_NUM_PORT; ++i) { |
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if (serial_priv->conf_data[i] & F81534_PORT_UNAVAILABLE) |
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continue; |
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|
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if (port->port_number == count) |
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return i; |
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|
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++count; |
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} |
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|
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return -ENODEV; |
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} |
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|
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static int f81534_set_register(struct usb_serial *serial, u16 reg, u8 data) |
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{ |
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struct usb_interface *interface = serial->interface; |
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struct usb_device *dev = serial->dev; |
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size_t count = F81534_USB_MAX_RETRY; |
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int status; |
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u8 *tmp; |
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|
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tmp = kmalloc(sizeof(u8), GFP_KERNEL); |
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if (!tmp) |
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return -ENOMEM; |
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|
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*tmp = data; |
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|
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/* |
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* Our device maybe not reply when heavily loading, We'll retry for |
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* F81534_USB_MAX_RETRY times. |
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*/ |
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while (count--) { |
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status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
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F81534_SET_GET_REGISTER, |
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USB_TYPE_VENDOR | USB_DIR_OUT, |
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reg, 0, tmp, sizeof(u8), |
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F81534_USB_TIMEOUT); |
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if (status == sizeof(u8)) { |
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status = 0; |
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break; |
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} |
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} |
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|
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if (status < 0) { |
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dev_err(&interface->dev, "%s: reg: %x data: %x failed: %d\n", |
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__func__, reg, data, status); |
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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 f81534_get_register(struct usb_serial *serial, u16 reg, u8 *data) |
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{ |
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struct usb_interface *interface = serial->interface; |
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struct usb_device *dev = serial->dev; |
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size_t count = F81534_USB_MAX_RETRY; |
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int status; |
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u8 *tmp; |
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|
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tmp = kmalloc(sizeof(u8), GFP_KERNEL); |
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if (!tmp) |
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return -ENOMEM; |
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|
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/* |
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* Our device maybe not reply when heavily loading, We'll retry for |
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* F81534_USB_MAX_RETRY times. |
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*/ |
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while (count--) { |
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status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
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F81534_SET_GET_REGISTER, |
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USB_TYPE_VENDOR | USB_DIR_IN, |
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reg, 0, tmp, sizeof(u8), |
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F81534_USB_TIMEOUT); |
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if (status > 0) { |
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status = 0; |
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break; |
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} else if (status == 0) { |
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status = -EIO; |
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} |
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} |
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|
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if (status < 0) { |
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dev_err(&interface->dev, "%s: reg: %x failed: %d\n", __func__, |
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reg, status); |
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goto end; |
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} |
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|
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*data = *tmp; |
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|
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end: |
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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 f81534_set_mask_register(struct usb_serial *serial, u16 reg, |
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u8 mask, u8 data) |
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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 = f81534_get_register(serial, reg, &tmp); |
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if (status) |
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return status; |
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|
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tmp &= ~mask; |
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tmp |= (mask & data); |
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|
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return f81534_set_register(serial, reg, tmp); |
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} |
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|
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static int f81534_set_phy_port_register(struct usb_serial *serial, int phy, |
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u16 reg, u8 data) |
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{ |
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return f81534_set_register(serial, reg + F81534_UART_OFFSET * phy, |
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data); |
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} |
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|
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static int f81534_get_phy_port_register(struct usb_serial *serial, int phy, |
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u16 reg, u8 *data) |
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{ |
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return f81534_get_register(serial, reg + F81534_UART_OFFSET * phy, |
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data); |
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} |
|
|
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static int f81534_set_port_register(struct usb_serial_port *port, u16 reg, |
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u8 data) |
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{ |
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struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
|
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return f81534_set_register(port->serial, |
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reg + port_priv->phy_num * F81534_UART_OFFSET, data); |
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} |
|
|
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static int f81534_get_port_register(struct usb_serial_port *port, u16 reg, |
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u8 *data) |
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{ |
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struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
|
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return f81534_get_register(port->serial, |
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reg + port_priv->phy_num * F81534_UART_OFFSET, data); |
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} |
|
|
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/* |
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* If we try to access the internal flash via SPI bus, we should check the bus |
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* status for every command. e.g., F81534_BUS_REG_START/F81534_BUS_REG_END |
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*/ |
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static int f81534_wait_for_spi_idle(struct usb_serial *serial) |
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{ |
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size_t count = F81534_MAX_BUS_RETRY; |
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u8 tmp; |
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int status; |
|
|
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do { |
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status = f81534_get_register(serial, F81534_BUS_REG_STATUS, |
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&tmp); |
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if (status) |
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return status; |
|
|
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if (tmp & F81534_BUS_BUSY) |
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continue; |
|
|
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if (tmp & F81534_BUS_IDLE) |
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break; |
|
|
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} while (--count); |
|
|
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if (!count) { |
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dev_err(&serial->interface->dev, |
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"%s: timed out waiting for idle SPI bus\n", |
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__func__); |
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return -EIO; |
|
} |
|
|
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return f81534_set_register(serial, F81534_BUS_REG_STATUS, |
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tmp & ~F81534_BUS_IDLE); |
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} |
|
|
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static int f81534_get_spi_register(struct usb_serial *serial, u16 reg, |
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u8 *data) |
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{ |
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int status; |
|
|
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status = f81534_get_register(serial, reg, data); |
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if (status) |
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return status; |
|
|
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return f81534_wait_for_spi_idle(serial); |
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} |
|
|
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static int f81534_set_spi_register(struct usb_serial *serial, u16 reg, u8 data) |
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{ |
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int status; |
|
|
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status = f81534_set_register(serial, reg, data); |
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if (status) |
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return status; |
|
|
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return f81534_wait_for_spi_idle(serial); |
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} |
|
|
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static int f81534_read_flash(struct usb_serial *serial, u32 address, |
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size_t size, u8 *buf) |
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{ |
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u8 tmp_buf[F81534_MAX_DATA_BLOCK]; |
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size_t block = 0; |
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size_t read_size; |
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size_t count; |
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int status; |
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int offset; |
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u16 reg_tmp; |
|
|
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status = f81534_set_spi_register(serial, F81534_BUS_REG_START, |
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F81534_CMD_READ); |
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if (status) |
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return status; |
|
|
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status = f81534_set_spi_register(serial, F81534_BUS_REG_START, |
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(address >> 16) & 0xff); |
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if (status) |
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return status; |
|
|
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status = f81534_set_spi_register(serial, F81534_BUS_REG_START, |
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(address >> 8) & 0xff); |
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if (status) |
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return status; |
|
|
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status = f81534_set_spi_register(serial, F81534_BUS_REG_START, |
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(address >> 0) & 0xff); |
|
if (status) |
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return status; |
|
|
|
/* Continuous read mode */ |
|
do { |
|
read_size = min_t(size_t, F81534_MAX_DATA_BLOCK, size); |
|
|
|
for (count = 0; count < read_size; ++count) { |
|
/* To write F81534_BUS_REG_END when final byte */ |
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if (size <= F81534_MAX_DATA_BLOCK && |
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read_size == count + 1) |
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reg_tmp = F81534_BUS_REG_END; |
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else |
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reg_tmp = F81534_BUS_REG_START; |
|
|
|
/* |
|
* Dummy code, force IC to generate a read pulse, the |
|
* set of value 0xf1 is dont care (any value is ok) |
|
*/ |
|
status = f81534_set_spi_register(serial, reg_tmp, |
|
0xf1); |
|
if (status) |
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return status; |
|
|
|
status = f81534_get_spi_register(serial, |
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F81534_BUS_READ_DATA, |
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&tmp_buf[count]); |
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if (status) |
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return status; |
|
|
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offset = count + block * F81534_MAX_DATA_BLOCK; |
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buf[offset] = tmp_buf[count]; |
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} |
|
|
|
size -= read_size; |
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++block; |
|
} while (size); |
|
|
|
return 0; |
|
} |
|
|
|
static void f81534_prepare_write_buffer(struct usb_serial_port *port, u8 *buf) |
|
{ |
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struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
int phy_num = port_priv->phy_num; |
|
u8 tx_len; |
|
int i; |
|
|
|
/* |
|
* The block layout is fixed with 4x128 Bytes, per 128 Bytes a port. |
|
* index 0: port phy idx (e.g., 0,1,2,3) |
|
* index 1: only F81534_TOKEN_WRITE |
|
* index 2: serial TX out length |
|
* index 3: fix to 0 |
|
* index 4~127: serial out data block |
|
*/ |
|
for (i = 0; i < F81534_NUM_PORT; ++i) { |
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buf[i * F81534_RECEIVE_BLOCK_SIZE] = i; |
|
buf[i * F81534_RECEIVE_BLOCK_SIZE + 1] = F81534_TOKEN_WRITE; |
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buf[i * F81534_RECEIVE_BLOCK_SIZE + 2] = 0; |
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buf[i * F81534_RECEIVE_BLOCK_SIZE + 3] = 0; |
|
} |
|
|
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tx_len = kfifo_out_locked(&port->write_fifo, |
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&buf[phy_num * F81534_RECEIVE_BLOCK_SIZE + 4], |
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F81534_MAX_TX_SIZE, &port->lock); |
|
|
|
buf[phy_num * F81534_RECEIVE_BLOCK_SIZE + 2] = tx_len; |
|
} |
|
|
|
static int f81534_submit_writer(struct usb_serial_port *port, gfp_t mem_flags) |
|
{ |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
struct urb *urb; |
|
unsigned long flags; |
|
int result; |
|
|
|
/* Check is any data in write_fifo */ |
|
spin_lock_irqsave(&port->lock, flags); |
|
|
|
if (kfifo_is_empty(&port->write_fifo)) { |
|
spin_unlock_irqrestore(&port->lock, flags); |
|
return 0; |
|
} |
|
|
|
spin_unlock_irqrestore(&port->lock, flags); |
|
|
|
/* Check H/W is TXEMPTY */ |
|
if (!test_and_clear_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty)) |
|
return 0; |
|
|
|
urb = port->write_urbs[0]; |
|
f81534_prepare_write_buffer(port, port->bulk_out_buffers[0]); |
|
urb->transfer_buffer_length = F81534_WRITE_BUFFER_SIZE; |
|
|
|
result = usb_submit_urb(urb, mem_flags); |
|
if (result) { |
|
set_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty); |
|
dev_err(&port->dev, "%s: submit failed: %d\n", __func__, |
|
result); |
|
return result; |
|
} |
|
|
|
usb_serial_port_softint(port); |
|
return 0; |
|
} |
|
|
|
static u32 f81534_calc_baud_divisor(u32 baudrate, u32 clockrate) |
|
{ |
|
if (!baudrate) |
|
return 0; |
|
|
|
/* Round to nearest divisor */ |
|
return DIV_ROUND_CLOSEST(clockrate, baudrate); |
|
} |
|
|
|
static int f81534_find_clk(u32 baudrate) |
|
{ |
|
int idx; |
|
|
|
for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) { |
|
if (baudrate <= baudrate_table[idx] && |
|
baudrate_table[idx] % baudrate == 0) |
|
return idx; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int f81534_set_port_config(struct usb_serial_port *port, |
|
struct tty_struct *tty, u32 baudrate, u32 old_baudrate, u8 lcr) |
|
{ |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
u32 divisor; |
|
int status; |
|
int i; |
|
int idx; |
|
u8 value; |
|
u32 baud_list[] = {baudrate, old_baudrate, F81534_DEFAULT_BAUD_RATE}; |
|
|
|
for (i = 0; i < ARRAY_SIZE(baud_list); ++i) { |
|
idx = f81534_find_clk(baud_list[i]); |
|
if (idx >= 0) { |
|
baudrate = baud_list[i]; |
|
tty_encode_baud_rate(tty, baudrate, baudrate); |
|
break; |
|
} |
|
} |
|
|
|
if (idx < 0) |
|
return -EINVAL; |
|
|
|
port_priv->baud_base = baudrate_table[idx]; |
|
port_priv->shadow_clk &= ~F81534_CLK_MASK; |
|
port_priv->shadow_clk |= clock_table[idx]; |
|
|
|
status = f81534_set_port_register(port, F81534_CLOCK_REG, |
|
port_priv->shadow_clk); |
|
if (status) { |
|
dev_err(&port->dev, "CLOCK_REG setting failed\n"); |
|
return status; |
|
} |
|
|
|
if (baudrate <= 1200) |
|
value = F81534_1X_RXTRIGGER; /* 128 FIFO & TL: 1x */ |
|
else |
|
value = F81534_8X_RXTRIGGER; /* 128 FIFO & TL: 8x */ |
|
|
|
status = f81534_set_port_register(port, F81534_CONFIG1_REG, value); |
|
if (status) { |
|
dev_err(&port->dev, "%s: CONFIG1 setting failed\n", __func__); |
|
return status; |
|
} |
|
|
|
if (baudrate <= 1200) |
|
value = UART_FCR_TRIGGER_1 | UART_FCR_ENABLE_FIFO; /* TL: 1 */ |
|
else |
|
value = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO; /* TL: 8 */ |
|
|
|
status = f81534_set_port_register(port, F81534_FIFO_CONTROL_REG, |
|
value); |
|
if (status) { |
|
dev_err(&port->dev, "%s: FCR setting failed\n", __func__); |
|
return status; |
|
} |
|
|
|
divisor = f81534_calc_baud_divisor(baudrate, port_priv->baud_base); |
|
|
|
mutex_lock(&port_priv->lcr_mutex); |
|
|
|
value = UART_LCR_DLAB; |
|
status = f81534_set_port_register(port, F81534_LINE_CONTROL_REG, |
|
value); |
|
if (status) { |
|
dev_err(&port->dev, "%s: set LCR failed\n", __func__); |
|
goto out_unlock; |
|
} |
|
|
|
value = divisor & 0xff; |
|
status = f81534_set_port_register(port, F81534_DIVISOR_LSB_REG, value); |
|
if (status) { |
|
dev_err(&port->dev, "%s: set DLAB LSB failed\n", __func__); |
|
goto out_unlock; |
|
} |
|
|
|
value = (divisor >> 8) & 0xff; |
|
status = f81534_set_port_register(port, F81534_DIVISOR_MSB_REG, value); |
|
if (status) { |
|
dev_err(&port->dev, "%s: set DLAB MSB failed\n", __func__); |
|
goto out_unlock; |
|
} |
|
|
|
value = lcr | (port_priv->shadow_lcr & UART_LCR_SBC); |
|
status = f81534_set_port_register(port, F81534_LINE_CONTROL_REG, |
|
value); |
|
if (status) { |
|
dev_err(&port->dev, "%s: set LCR failed\n", __func__); |
|
goto out_unlock; |
|
} |
|
|
|
port_priv->shadow_lcr = value; |
|
out_unlock: |
|
mutex_unlock(&port_priv->lcr_mutex); |
|
|
|
return status; |
|
} |
|
|
|
static void f81534_break_ctl(struct tty_struct *tty, int break_state) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
int status; |
|
|
|
mutex_lock(&port_priv->lcr_mutex); |
|
|
|
if (break_state) |
|
port_priv->shadow_lcr |= UART_LCR_SBC; |
|
else |
|
port_priv->shadow_lcr &= ~UART_LCR_SBC; |
|
|
|
status = f81534_set_port_register(port, F81534_LINE_CONTROL_REG, |
|
port_priv->shadow_lcr); |
|
if (status) |
|
dev_err(&port->dev, "set break failed: %d\n", status); |
|
|
|
mutex_unlock(&port_priv->lcr_mutex); |
|
} |
|
|
|
static int f81534_update_mctrl(struct usb_serial_port *port, unsigned int set, |
|
unsigned int clear) |
|
{ |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
int status; |
|
u8 tmp; |
|
|
|
if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) |
|
return 0; /* no change */ |
|
|
|
mutex_lock(&port_priv->mcr_mutex); |
|
|
|
/* 'Set' takes precedence over 'Clear' */ |
|
clear &= ~set; |
|
|
|
/* Always enable UART_MCR_OUT2 */ |
|
tmp = UART_MCR_OUT2 | port_priv->shadow_mcr; |
|
|
|
if (clear & TIOCM_DTR) |
|
tmp &= ~UART_MCR_DTR; |
|
|
|
if (clear & TIOCM_RTS) |
|
tmp &= ~UART_MCR_RTS; |
|
|
|
if (set & TIOCM_DTR) |
|
tmp |= UART_MCR_DTR; |
|
|
|
if (set & TIOCM_RTS) |
|
tmp |= UART_MCR_RTS; |
|
|
|
status = f81534_set_port_register(port, F81534_MODEM_CONTROL_REG, tmp); |
|
if (status < 0) { |
|
dev_err(&port->dev, "%s: MCR write failed\n", __func__); |
|
mutex_unlock(&port_priv->mcr_mutex); |
|
return status; |
|
} |
|
|
|
port_priv->shadow_mcr = tmp; |
|
mutex_unlock(&port_priv->mcr_mutex); |
|
return 0; |
|
} |
|
|
|
/* |
|
* This function will search the data area with token F81534_CUSTOM_VALID_TOKEN |
|
* for latest configuration index. If nothing found |
|
* (*index = F81534_CUSTOM_NO_CUSTOM_DATA), We'll load default configure in |
|
* F81534_DEF_CONF_ADDRESS_START section. |
|
* |
|
* Due to we only use block0 to save data, so *index should be 0 or |
|
* F81534_CUSTOM_NO_CUSTOM_DATA. |
|
*/ |
|
static int f81534_find_config_idx(struct usb_serial *serial, u8 *index) |
|
{ |
|
u8 tmp; |
|
int status; |
|
|
|
status = f81534_read_flash(serial, F81534_CUSTOM_ADDRESS_START, 1, |
|
&tmp); |
|
if (status) { |
|
dev_err(&serial->interface->dev, "%s: read failed: %d\n", |
|
__func__, status); |
|
return status; |
|
} |
|
|
|
/* We'll use the custom data when the data is valid. */ |
|
if (tmp == F81534_CUSTOM_VALID_TOKEN) |
|
*index = 0; |
|
else |
|
*index = F81534_CUSTOM_NO_CUSTOM_DATA; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* The F81532/534 will not report serial port to USB serial subsystem when |
|
* H/W DCD/DSR/CTS/RI/RX pin connected to ground. |
|
* |
|
* To detect RX pin status, we'll enable MCR interal loopback, disable it and |
|
* delayed for 60ms. It connected to ground If LSR register report UART_LSR_BI. |
|
*/ |
|
static bool f81534_check_port_hw_disabled(struct usb_serial *serial, int phy) |
|
{ |
|
int status; |
|
u8 old_mcr; |
|
u8 msr; |
|
u8 lsr; |
|
u8 msr_mask; |
|
|
|
msr_mask = UART_MSR_DCD | UART_MSR_RI | UART_MSR_DSR | UART_MSR_CTS; |
|
|
|
status = f81534_get_phy_port_register(serial, phy, |
|
F81534_MODEM_STATUS_REG, &msr); |
|
if (status) |
|
return false; |
|
|
|
if ((msr & msr_mask) != msr_mask) |
|
return false; |
|
|
|
status = f81534_set_phy_port_register(serial, phy, |
|
F81534_FIFO_CONTROL_REG, UART_FCR_ENABLE_FIFO | |
|
UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); |
|
if (status) |
|
return false; |
|
|
|
status = f81534_get_phy_port_register(serial, phy, |
|
F81534_MODEM_CONTROL_REG, &old_mcr); |
|
if (status) |
|
return false; |
|
|
|
status = f81534_set_phy_port_register(serial, phy, |
|
F81534_MODEM_CONTROL_REG, UART_MCR_LOOP); |
|
if (status) |
|
return false; |
|
|
|
status = f81534_set_phy_port_register(serial, phy, |
|
F81534_MODEM_CONTROL_REG, 0x0); |
|
if (status) |
|
return false; |
|
|
|
msleep(60); |
|
|
|
status = f81534_get_phy_port_register(serial, phy, |
|
F81534_LINE_STATUS_REG, &lsr); |
|
if (status) |
|
return false; |
|
|
|
status = f81534_set_phy_port_register(serial, phy, |
|
F81534_MODEM_CONTROL_REG, old_mcr); |
|
if (status) |
|
return false; |
|
|
|
if ((lsr & UART_LSR_BI) == UART_LSR_BI) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
/* |
|
* We had 2 generation of F81532/534 IC. All has an internal storage. |
|
* |
|
* 1st is pure USB-to-TTL RS232 IC and designed for 4 ports only, no any |
|
* internal data will used. All mode and gpio control should manually set |
|
* by AP or Driver and all storage space value are 0xff. The |
|
* f81534_calc_num_ports() will run to final we marked as "oldest version" |
|
* for this IC. |
|
* |
|
* 2rd is designed to more generic to use any transceiver and this is our |
|
* mass production type. We'll save data in F81534_CUSTOM_ADDRESS_START |
|
* (0x2f00) with 9bytes. The 1st byte is a indicater. If the token is |
|
* F81534_CUSTOM_VALID_TOKEN(0xf0), the IC is 2nd gen type, the following |
|
* 4bytes save port mode (0:RS232/1:RS485 Invert/2:RS485), and the last |
|
* 4bytes save GPIO state(value from 0~7 to represent 3 GPIO output pin). |
|
* The f81534_calc_num_ports() will run to "new style" with checking |
|
* F81534_PORT_UNAVAILABLE section. |
|
*/ |
|
static int f81534_calc_num_ports(struct usb_serial *serial, |
|
struct usb_serial_endpoints *epds) |
|
{ |
|
struct f81534_serial_private *serial_priv; |
|
struct device *dev = &serial->interface->dev; |
|
int size_bulk_in = usb_endpoint_maxp(epds->bulk_in[0]); |
|
int size_bulk_out = usb_endpoint_maxp(epds->bulk_out[0]); |
|
u8 num_port = 0; |
|
int index = 0; |
|
int status; |
|
int i; |
|
|
|
if (size_bulk_out != F81534_WRITE_BUFFER_SIZE || |
|
size_bulk_in != F81534_MAX_RECEIVE_BLOCK_SIZE) { |
|
dev_err(dev, "unsupported endpoint max packet size\n"); |
|
return -ENODEV; |
|
} |
|
|
|
serial_priv = devm_kzalloc(&serial->interface->dev, |
|
sizeof(*serial_priv), GFP_KERNEL); |
|
if (!serial_priv) |
|
return -ENOMEM; |
|
|
|
usb_set_serial_data(serial, serial_priv); |
|
mutex_init(&serial_priv->urb_mutex); |
|
|
|
/* Check had custom setting */ |
|
status = f81534_find_config_idx(serial, &serial_priv->setting_idx); |
|
if (status) { |
|
dev_err(&serial->interface->dev, "%s: find idx failed: %d\n", |
|
__func__, status); |
|
return status; |
|
} |
|
|
|
/* |
|
* We'll read custom data only when data available, otherwise we'll |
|
* read default value instead. |
|
*/ |
|
if (serial_priv->setting_idx != F81534_CUSTOM_NO_CUSTOM_DATA) { |
|
status = f81534_read_flash(serial, |
|
F81534_CUSTOM_ADDRESS_START + |
|
F81534_CONF_OFFSET, |
|
sizeof(serial_priv->conf_data), |
|
serial_priv->conf_data); |
|
if (status) { |
|
dev_err(&serial->interface->dev, |
|
"%s: get custom data failed: %d\n", |
|
__func__, status); |
|
return status; |
|
} |
|
|
|
dev_dbg(&serial->interface->dev, |
|
"%s: read config from block: %d\n", __func__, |
|
serial_priv->setting_idx); |
|
} else { |
|
/* Read default board setting */ |
|
status = f81534_read_flash(serial, |
|
F81534_DEF_CONF_ADDRESS_START, |
|
sizeof(serial_priv->conf_data), |
|
serial_priv->conf_data); |
|
if (status) { |
|
dev_err(&serial->interface->dev, |
|
"%s: read failed: %d\n", __func__, |
|
status); |
|
return status; |
|
} |
|
|
|
dev_dbg(&serial->interface->dev, "%s: read default config\n", |
|
__func__); |
|
} |
|
|
|
/* New style, find all possible ports */ |
|
for (i = 0; i < F81534_NUM_PORT; ++i) { |
|
if (f81534_check_port_hw_disabled(serial, i)) |
|
serial_priv->conf_data[i] |= F81534_PORT_UNAVAILABLE; |
|
|
|
if (serial_priv->conf_data[i] & F81534_PORT_UNAVAILABLE) |
|
continue; |
|
|
|
++num_port; |
|
} |
|
|
|
if (!num_port) { |
|
dev_warn(&serial->interface->dev, |
|
"no config found, assuming 4 ports\n"); |
|
num_port = 4; /* Nothing found, oldest version IC */ |
|
} |
|
|
|
/* Assign phy-to-logic mapping */ |
|
for (i = 0; i < F81534_NUM_PORT; ++i) { |
|
if (serial_priv->conf_data[i] & F81534_PORT_UNAVAILABLE) |
|
continue; |
|
|
|
serial_priv->tty_idx[i] = index++; |
|
dev_dbg(&serial->interface->dev, |
|
"%s: phy_num: %d, tty_idx: %d\n", __func__, i, |
|
serial_priv->tty_idx[i]); |
|
} |
|
|
|
/* |
|
* Setup bulk-out endpoint multiplexing. All ports share the same |
|
* bulk-out endpoint. |
|
*/ |
|
BUILD_BUG_ON(ARRAY_SIZE(epds->bulk_out) < F81534_NUM_PORT); |
|
|
|
for (i = 1; i < num_port; ++i) |
|
epds->bulk_out[i] = epds->bulk_out[0]; |
|
|
|
epds->num_bulk_out = num_port; |
|
|
|
return num_port; |
|
} |
|
|
|
static void f81534_set_termios(struct tty_struct *tty, |
|
struct usb_serial_port *port, |
|
struct ktermios *old_termios) |
|
{ |
|
u8 new_lcr = 0; |
|
int status; |
|
u32 baud; |
|
u32 old_baud; |
|
|
|
if (C_BAUD(tty) == B0) |
|
f81534_update_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); |
|
else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) |
|
f81534_update_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); |
|
|
|
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; |
|
} |
|
|
|
baud = tty_get_baud_rate(tty); |
|
if (!baud) |
|
return; |
|
|
|
if (old_termios) |
|
old_baud = tty_termios_baud_rate(old_termios); |
|
else |
|
old_baud = F81534_DEFAULT_BAUD_RATE; |
|
|
|
dev_dbg(&port->dev, "%s: baud: %d\n", __func__, baud); |
|
|
|
status = f81534_set_port_config(port, tty, baud, old_baud, new_lcr); |
|
if (status < 0) { |
|
dev_err(&port->dev, "%s: set port config failed: %d\n", |
|
__func__, status); |
|
} |
|
} |
|
|
|
static int f81534_submit_read_urb(struct usb_serial *serial, gfp_t flags) |
|
{ |
|
return usb_serial_generic_submit_read_urbs(serial->port[0], flags); |
|
} |
|
|
|
static void f81534_msr_changed(struct usb_serial_port *port, u8 msr) |
|
{ |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
struct tty_struct *tty; |
|
unsigned long flags; |
|
u8 old_msr; |
|
|
|
if (!(msr & UART_MSR_ANY_DELTA)) |
|
return; |
|
|
|
spin_lock_irqsave(&port_priv->msr_lock, flags); |
|
old_msr = port_priv->shadow_msr; |
|
port_priv->shadow_msr = msr; |
|
spin_unlock_irqrestore(&port_priv->msr_lock, flags); |
|
|
|
dev_dbg(&port->dev, "%s: MSR from %02x to %02x\n", __func__, old_msr, |
|
msr); |
|
|
|
/* Update input line counters */ |
|
if (msr & UART_MSR_DCTS) |
|
port->icount.cts++; |
|
if (msr & UART_MSR_DDSR) |
|
port->icount.dsr++; |
|
if (msr & UART_MSR_DDCD) |
|
port->icount.dcd++; |
|
if (msr & UART_MSR_TERI) |
|
port->icount.rng++; |
|
|
|
wake_up_interruptible(&port->port.delta_msr_wait); |
|
|
|
if (!(msr & UART_MSR_DDCD)) |
|
return; |
|
|
|
dev_dbg(&port->dev, "%s: DCD Changed: phy_num: %d from %x to %x\n", |
|
__func__, port_priv->phy_num, old_msr, msr); |
|
|
|
tty = tty_port_tty_get(&port->port); |
|
if (!tty) |
|
return; |
|
|
|
usb_serial_handle_dcd_change(port, tty, msr & UART_MSR_DCD); |
|
tty_kref_put(tty); |
|
} |
|
|
|
static int f81534_read_msr(struct usb_serial_port *port) |
|
{ |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
unsigned long flags; |
|
int status; |
|
u8 msr; |
|
|
|
/* Get MSR initial value */ |
|
status = f81534_get_port_register(port, F81534_MODEM_STATUS_REG, &msr); |
|
if (status) |
|
return status; |
|
|
|
/* Force update current state */ |
|
spin_lock_irqsave(&port_priv->msr_lock, flags); |
|
port_priv->shadow_msr = msr; |
|
spin_unlock_irqrestore(&port_priv->msr_lock, flags); |
|
|
|
return 0; |
|
} |
|
|
|
static int f81534_open(struct tty_struct *tty, struct usb_serial_port *port) |
|
{ |
|
struct f81534_serial_private *serial_priv = |
|
usb_get_serial_data(port->serial); |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
int status; |
|
|
|
status = f81534_set_port_register(port, |
|
F81534_FIFO_CONTROL_REG, UART_FCR_ENABLE_FIFO | |
|
UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); |
|
if (status) { |
|
dev_err(&port->dev, "%s: Clear FIFO failed: %d\n", __func__, |
|
status); |
|
return status; |
|
} |
|
|
|
if (tty) |
|
f81534_set_termios(tty, port, NULL); |
|
|
|
status = f81534_read_msr(port); |
|
if (status) |
|
return status; |
|
|
|
mutex_lock(&serial_priv->urb_mutex); |
|
|
|
/* Submit Read URBs for first port opened */ |
|
if (!serial_priv->opened_port) { |
|
status = f81534_submit_read_urb(port->serial, GFP_KERNEL); |
|
if (status) |
|
goto exit; |
|
} |
|
|
|
serial_priv->opened_port++; |
|
|
|
exit: |
|
mutex_unlock(&serial_priv->urb_mutex); |
|
|
|
set_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty); |
|
return status; |
|
} |
|
|
|
static void f81534_close(struct usb_serial_port *port) |
|
{ |
|
struct f81534_serial_private *serial_priv = |
|
usb_get_serial_data(port->serial); |
|
struct usb_serial_port *port0 = port->serial->port[0]; |
|
unsigned long flags; |
|
size_t i; |
|
|
|
usb_kill_urb(port->write_urbs[0]); |
|
|
|
spin_lock_irqsave(&port->lock, flags); |
|
kfifo_reset_out(&port->write_fifo); |
|
spin_unlock_irqrestore(&port->lock, flags); |
|
|
|
/* Kill Read URBs when final port closed */ |
|
mutex_lock(&serial_priv->urb_mutex); |
|
serial_priv->opened_port--; |
|
|
|
if (!serial_priv->opened_port) { |
|
for (i = 0; i < ARRAY_SIZE(port0->read_urbs); ++i) |
|
usb_kill_urb(port0->read_urbs[i]); |
|
} |
|
|
|
mutex_unlock(&serial_priv->urb_mutex); |
|
} |
|
|
|
static int f81534_get_serial_info(struct tty_struct *tty, |
|
struct serial_struct *ss) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct f81534_port_private *port_priv; |
|
|
|
port_priv = usb_get_serial_port_data(port); |
|
|
|
ss->type = PORT_16550A; |
|
ss->port = port->port_number; |
|
ss->line = port->minor; |
|
ss->baud_base = port_priv->baud_base; |
|
return 0; |
|
} |
|
|
|
static void f81534_process_per_serial_block(struct usb_serial_port *port, |
|
u8 *data) |
|
{ |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
int phy_num = data[0]; |
|
size_t read_size = 0; |
|
size_t i; |
|
char tty_flag; |
|
int status; |
|
u8 lsr; |
|
|
|
/* |
|
* The block layout is 128 Bytes |
|
* index 0: port phy idx (e.g., 0,1,2,3), |
|
* index 1: It's could be |
|
* F81534_TOKEN_RECEIVE |
|
* F81534_TOKEN_TX_EMPTY |
|
* F81534_TOKEN_MSR_CHANGE |
|
* index 2: serial in size (data+lsr, must be even) |
|
* meaningful for F81534_TOKEN_RECEIVE only |
|
* index 3: current MSR with this device |
|
* index 4~127: serial in data block (data+lsr, must be even) |
|
*/ |
|
switch (data[1]) { |
|
case F81534_TOKEN_TX_EMPTY: |
|
set_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty); |
|
|
|
/* Try to submit writer */ |
|
status = f81534_submit_writer(port, GFP_ATOMIC); |
|
if (status) |
|
dev_err(&port->dev, "%s: submit failed\n", __func__); |
|
return; |
|
|
|
case F81534_TOKEN_MSR_CHANGE: |
|
f81534_msr_changed(port, data[3]); |
|
return; |
|
|
|
case F81534_TOKEN_RECEIVE: |
|
read_size = data[2]; |
|
if (read_size > F81534_MAX_RX_SIZE) { |
|
dev_err(&port->dev, |
|
"%s: phy: %d read_size: %zu larger than: %d\n", |
|
__func__, phy_num, read_size, |
|
F81534_MAX_RX_SIZE); |
|
return; |
|
} |
|
|
|
break; |
|
|
|
default: |
|
dev_warn(&port->dev, "%s: unknown token: %02x\n", __func__, |
|
data[1]); |
|
return; |
|
} |
|
|
|
for (i = 4; i < 4 + read_size; i += 2) { |
|
tty_flag = TTY_NORMAL; |
|
lsr = data[i + 1]; |
|
|
|
if (lsr & UART_LSR_BRK_ERROR_BITS) { |
|
if (lsr & UART_LSR_BI) { |
|
tty_flag = TTY_BREAK; |
|
port->icount.brk++; |
|
usb_serial_handle_break(port); |
|
} else if (lsr & UART_LSR_PE) { |
|
tty_flag = TTY_PARITY; |
|
port->icount.parity++; |
|
} else if (lsr & UART_LSR_FE) { |
|
tty_flag = TTY_FRAME; |
|
port->icount.frame++; |
|
} |
|
|
|
if (lsr & UART_LSR_OE) { |
|
port->icount.overrun++; |
|
tty_insert_flip_char(&port->port, 0, |
|
TTY_OVERRUN); |
|
} |
|
|
|
schedule_work(&port_priv->lsr_work); |
|
} |
|
|
|
if (port->sysrq) { |
|
if (usb_serial_handle_sysrq_char(port, data[i])) |
|
continue; |
|
} |
|
|
|
tty_insert_flip_char(&port->port, data[i], tty_flag); |
|
} |
|
|
|
tty_flip_buffer_push(&port->port); |
|
} |
|
|
|
static void f81534_process_read_urb(struct urb *urb) |
|
{ |
|
struct f81534_serial_private *serial_priv; |
|
struct usb_serial_port *port; |
|
struct usb_serial *serial; |
|
u8 *buf; |
|
int phy_port_num; |
|
int tty_port_num; |
|
size_t i; |
|
|
|
if (!urb->actual_length || |
|
urb->actual_length % F81534_RECEIVE_BLOCK_SIZE) { |
|
return; |
|
} |
|
|
|
port = urb->context; |
|
serial = port->serial; |
|
buf = urb->transfer_buffer; |
|
serial_priv = usb_get_serial_data(serial); |
|
|
|
for (i = 0; i < urb->actual_length; i += F81534_RECEIVE_BLOCK_SIZE) { |
|
phy_port_num = buf[i]; |
|
if (phy_port_num >= F81534_NUM_PORT) { |
|
dev_err(&port->dev, |
|
"%s: phy_port_num: %d larger than: %d\n", |
|
__func__, phy_port_num, F81534_NUM_PORT); |
|
continue; |
|
} |
|
|
|
tty_port_num = serial_priv->tty_idx[phy_port_num]; |
|
port = serial->port[tty_port_num]; |
|
|
|
if (tty_port_initialized(&port->port)) |
|
f81534_process_per_serial_block(port, &buf[i]); |
|
} |
|
} |
|
|
|
static void f81534_write_usb_callback(struct urb *urb) |
|
{ |
|
struct usb_serial_port *port = urb->context; |
|
|
|
switch (urb->status) { |
|
case 0: |
|
break; |
|
case -ENOENT: |
|
case -ECONNRESET: |
|
case -ESHUTDOWN: |
|
dev_dbg(&port->dev, "%s - urb stopped: %d\n", |
|
__func__, urb->status); |
|
return; |
|
case -EPIPE: |
|
dev_err(&port->dev, "%s - urb stopped: %d\n", |
|
__func__, urb->status); |
|
return; |
|
default: |
|
dev_dbg(&port->dev, "%s - nonzero urb status: %d\n", |
|
__func__, urb->status); |
|
break; |
|
} |
|
} |
|
|
|
static void f81534_lsr_worker(struct work_struct *work) |
|
{ |
|
struct f81534_port_private *port_priv; |
|
struct usb_serial_port *port; |
|
int status; |
|
u8 tmp; |
|
|
|
port_priv = container_of(work, struct f81534_port_private, lsr_work); |
|
port = port_priv->port; |
|
|
|
status = f81534_get_port_register(port, F81534_LINE_STATUS_REG, &tmp); |
|
if (status) |
|
dev_warn(&port->dev, "read LSR failed: %d\n", status); |
|
} |
|
|
|
static int f81534_set_port_output_pin(struct usb_serial_port *port) |
|
{ |
|
struct f81534_serial_private *serial_priv; |
|
struct f81534_port_private *port_priv; |
|
struct usb_serial *serial; |
|
const struct f81534_port_out_pin *pins; |
|
int status; |
|
int i; |
|
u8 value; |
|
u8 idx; |
|
|
|
serial = port->serial; |
|
serial_priv = usb_get_serial_data(serial); |
|
port_priv = usb_get_serial_port_data(port); |
|
|
|
idx = F81534_CONF_INIT_GPIO_OFFSET + port_priv->phy_num; |
|
value = serial_priv->conf_data[idx]; |
|
if (value >= F81534_CONF_GPIO_SHUTDOWN) { |
|
/* |
|
* Newer IC configure will make transceiver in shutdown mode on |
|
* initial power on. We need enable it before using UARTs. |
|
*/ |
|
idx = F81534_CONF_WORK_GPIO_OFFSET + port_priv->phy_num; |
|
value = serial_priv->conf_data[idx]; |
|
if (value >= F81534_CONF_GPIO_SHUTDOWN) |
|
value = F81534_CONF_GPIO_RS232; |
|
} |
|
|
|
pins = &f81534_port_out_pins[port_priv->phy_num]; |
|
|
|
for (i = 0; i < ARRAY_SIZE(pins->pin); ++i) { |
|
status = f81534_set_mask_register(serial, |
|
pins->pin[i].reg_addr, pins->pin[i].reg_mask, |
|
value & BIT(i) ? pins->pin[i].reg_mask : 0); |
|
if (status) |
|
return status; |
|
} |
|
|
|
dev_dbg(&port->dev, "Output pin (M0/M1/M2): %d\n", value); |
|
return 0; |
|
} |
|
|
|
static int f81534_port_probe(struct usb_serial_port *port) |
|
{ |
|
struct f81534_serial_private *serial_priv; |
|
struct f81534_port_private *port_priv; |
|
int ret; |
|
u8 value; |
|
|
|
serial_priv = usb_get_serial_data(port->serial); |
|
port_priv = devm_kzalloc(&port->dev, sizeof(*port_priv), GFP_KERNEL); |
|
if (!port_priv) |
|
return -ENOMEM; |
|
|
|
/* |
|
* We'll make tx frame error when baud rate from 384~500kps. So we'll |
|
* delay all tx data frame with 1bit. |
|
*/ |
|
port_priv->shadow_clk = F81534_UART_EN | F81534_CLK_TX_DELAY_1BIT; |
|
spin_lock_init(&port_priv->msr_lock); |
|
mutex_init(&port_priv->mcr_mutex); |
|
mutex_init(&port_priv->lcr_mutex); |
|
INIT_WORK(&port_priv->lsr_work, f81534_lsr_worker); |
|
|
|
/* Assign logic-to-phy mapping */ |
|
ret = f81534_logic_to_phy_port(port->serial, port); |
|
if (ret < 0) |
|
return ret; |
|
|
|
port_priv->phy_num = ret; |
|
port_priv->port = port; |
|
usb_set_serial_port_data(port, port_priv); |
|
dev_dbg(&port->dev, "%s: port_number: %d, phy_num: %d\n", __func__, |
|
port->port_number, port_priv->phy_num); |
|
|
|
/* |
|
* The F81532/534 will hang-up when enable LSR interrupt in IER and |
|
* occur data overrun. So we'll disable the LSR interrupt in probe() |
|
* and submit the LSR worker to clear LSR state when reported LSR error |
|
* bit with bulk-in data in f81534_process_per_serial_block(). |
|
*/ |
|
ret = f81534_set_port_register(port, F81534_INTERRUPT_ENABLE_REG, |
|
UART_IER_RDI | UART_IER_THRI | UART_IER_MSI); |
|
if (ret) |
|
return ret; |
|
|
|
value = serial_priv->conf_data[port_priv->phy_num]; |
|
switch (value & F81534_PORT_CONF_MODE_MASK) { |
|
case F81534_PORT_CONF_RS485_INVERT: |
|
port_priv->shadow_clk |= F81534_CLK_RS485_MODE | |
|
F81534_CLK_RS485_INVERT; |
|
dev_dbg(&port->dev, "RS485 invert mode\n"); |
|
break; |
|
case F81534_PORT_CONF_RS485: |
|
port_priv->shadow_clk |= F81534_CLK_RS485_MODE; |
|
dev_dbg(&port->dev, "RS485 mode\n"); |
|
break; |
|
|
|
default: |
|
case F81534_PORT_CONF_RS232: |
|
dev_dbg(&port->dev, "RS232 mode\n"); |
|
break; |
|
} |
|
|
|
return f81534_set_port_output_pin(port); |
|
} |
|
|
|
static void f81534_port_remove(struct usb_serial_port *port) |
|
{ |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
|
|
flush_work(&port_priv->lsr_work); |
|
} |
|
|
|
static int f81534_tiocmget(struct tty_struct *tty) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
int status; |
|
int r; |
|
u8 msr; |
|
u8 mcr; |
|
|
|
/* Read current MSR from device */ |
|
status = f81534_get_port_register(port, F81534_MODEM_STATUS_REG, &msr); |
|
if (status) |
|
return status; |
|
|
|
mutex_lock(&port_priv->mcr_mutex); |
|
mcr = port_priv->shadow_mcr; |
|
mutex_unlock(&port_priv->mcr_mutex); |
|
|
|
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 f81534_tiocmset(struct tty_struct *tty, unsigned int set, |
|
unsigned int clear) |
|
{ |
|
struct usb_serial_port *port = tty->driver_data; |
|
|
|
return f81534_update_mctrl(port, set, clear); |
|
} |
|
|
|
static void f81534_dtr_rts(struct usb_serial_port *port, int on) |
|
{ |
|
if (on) |
|
f81534_update_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); |
|
else |
|
f81534_update_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); |
|
} |
|
|
|
static int f81534_write(struct tty_struct *tty, struct usb_serial_port *port, |
|
const u8 *buf, int count) |
|
{ |
|
int bytes_out, status; |
|
|
|
if (!count) |
|
return 0; |
|
|
|
bytes_out = kfifo_in_locked(&port->write_fifo, buf, count, |
|
&port->lock); |
|
|
|
status = f81534_submit_writer(port, GFP_ATOMIC); |
|
if (status) { |
|
dev_err(&port->dev, "%s: submit failed\n", __func__); |
|
return status; |
|
} |
|
|
|
return bytes_out; |
|
} |
|
|
|
static bool f81534_tx_empty(struct usb_serial_port *port) |
|
{ |
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port); |
|
|
|
return test_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty); |
|
} |
|
|
|
static int f81534_resume(struct usb_serial *serial) |
|
{ |
|
struct f81534_serial_private *serial_priv = |
|
usb_get_serial_data(serial); |
|
struct usb_serial_port *port; |
|
int error = 0; |
|
int status; |
|
size_t i; |
|
|
|
/* |
|
* We'll register port 0 bulkin when port had opened, It'll take all |
|
* port received data, MSR register change and TX_EMPTY information. |
|
*/ |
|
mutex_lock(&serial_priv->urb_mutex); |
|
|
|
if (serial_priv->opened_port) { |
|
status = f81534_submit_read_urb(serial, GFP_NOIO); |
|
if (status) { |
|
mutex_unlock(&serial_priv->urb_mutex); |
|
return status; |
|
} |
|
} |
|
|
|
mutex_unlock(&serial_priv->urb_mutex); |
|
|
|
for (i = 0; i < serial->num_ports; i++) { |
|
port = serial->port[i]; |
|
if (!tty_port_initialized(&port->port)) |
|
continue; |
|
|
|
status = f81534_submit_writer(port, GFP_NOIO); |
|
if (status) { |
|
dev_err(&port->dev, "%s: submit failed\n", __func__); |
|
++error; |
|
} |
|
} |
|
|
|
if (error) |
|
return -EIO; |
|
|
|
return 0; |
|
} |
|
|
|
static struct usb_serial_driver f81534_device = { |
|
.driver = { |
|
.owner = THIS_MODULE, |
|
.name = "f81534", |
|
}, |
|
.description = DRIVER_DESC, |
|
.id_table = f81534_id_table, |
|
.num_bulk_in = 1, |
|
.num_bulk_out = 1, |
|
.open = f81534_open, |
|
.close = f81534_close, |
|
.write = f81534_write, |
|
.tx_empty = f81534_tx_empty, |
|
.calc_num_ports = f81534_calc_num_ports, |
|
.port_probe = f81534_port_probe, |
|
.port_remove = f81534_port_remove, |
|
.break_ctl = f81534_break_ctl, |
|
.dtr_rts = f81534_dtr_rts, |
|
.process_read_urb = f81534_process_read_urb, |
|
.get_serial = f81534_get_serial_info, |
|
.tiocmget = f81534_tiocmget, |
|
.tiocmset = f81534_tiocmset, |
|
.write_bulk_callback = f81534_write_usb_callback, |
|
.set_termios = f81534_set_termios, |
|
.resume = f81534_resume, |
|
}; |
|
|
|
static struct usb_serial_driver *const serial_drivers[] = { |
|
&f81534_device, NULL |
|
}; |
|
|
|
module_usb_serial_driver(serial_drivers, f81534_id_table); |
|
|
|
MODULE_DEVICE_TABLE(usb, f81534_id_table); |
|
MODULE_DESCRIPTION(DRIVER_DESC); |
|
MODULE_AUTHOR("Peter Hong <[email protected]>"); |
|
MODULE_AUTHOR("Tom Tsai <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|