On Tue, Nov 3, 2015 at 5:51 AM, Peter Hung <hpeter@xxxxxxxxx> wrote: > This driver is for Fintek F81532/F81534 USB to Serial Ports IC. > > Features: > 1. F81534 is 1-to-4 & F81532 is 1-to-2 serial ports IC > 2. Support Baudrate from B50 to B1500000 (excluding B1000000). > 3. The RTS signal can be transformed their behavior with > configuration by ioctl TIOCGRS485/TIOCSRS485 > > If the driver setting with SER_RS485_ENABLED, the RTS signal will > high with not in TX and low with in TX. > > If the driver setting with SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND, > the RTS signal will low with not in TX and high with in TX. > > 4. The 4x3 output-only open-drain pins for F81532/534 is designed for > control outer devices (with our EVB for examples, the 4 sets of pins > are designed to control transceiver mode). So it implements as > gpiolib interface with output-only function. > 5. It'll save the configuration in internal storage when uart/pins mode > changed. > > Please reference https://bitbucket.org/hpeter/fintek-general/src/ > with f81534/tools to get set_gpio.c & set_mode.c to change F81532/534 > setting. Please use it carefully. Few comments below. > +++ b/drivers/usb/serial/f81534.c > @@ -0,0 +1,2991 @@ > +/* > + * F81532/F81534 USB to Serial Ports Bridge > + * > + * F81532 => 2 Serial Ports > + * F81534 => 4 Serial Ports > + * > + * Copyright (C) 2014 Tom Tsai (Tom_Tsai@xxxxxxxxxxxxx) > + * > + * The F81532/F81534 had 1 control endpoint for setting, > + * 1 endpoint bulk-out for all serial port write out and > + * 1 endpoint bulk-in for all serial port read in. > + * > + * write URB is fixed with 512bytes, per serial port used 128Bytes. > + * is can be described by f81534_prepare_write_buffer() > + * > + * read URB is 512Bytes max. per serial port used 128Bytes. > + * is can be described by f81534_process_read_urb(), it' maybe > + * received with 128x1,2,3,4 bytes. > + * > + * We can control M0(SD)/M1/M2 per ports by gpiolib, This IC contains a > + * internal flash to save configuration. Due to reduce erase/write operation, > + * it's recommend sequence to request 3 pins, change value and release 3 gpio > + * pins. We'll really save configurations when M0(SD)/M1/M2 pin all released > + * for a port. > + * > + * Features: > + * 1. F81534 is 1-to-4 & F81532 is 1-to-2 serial ports IC > + * 2. Support Baudrate from B50 to B1500000 (excluding B1000000). > + * 3. The RTS signal can be transformed their behavior with > + * configuration by default ioctl TIOCGRS485/TIOCSRS485 > + * (for RS232/RS485/RS422 with transceiver) > + * > + * If the driver setting with SER_RS485_ENABLED, the RTS signal will > + * high with not in TX and low with in TX. > + * > + * If the driver setting with SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND, > + * the RTS signal will low with not in TX and high with in TX. > + * > + * 4. There are 4x3 output-only ic pins to control transceiver mode with our > + * EVB Board. It's can be controlled via gpiolib. We could found the gpio > + * number from /sys/class/tty/ttyUSB[x]/device/gpiochip[yyy] where > + * x is F81532/534 serial port and yyy is gpiochip number. > + * > + * After we found chip number, we can export 3 gpios(M0(SD)/M1/M2) per > + * serial port by > + * echo yyy > /sys/class/gpio/export > + * echo yyy+1 > /sys/class/gpio/export > + * echo yyy+2 > /sys/class/gpio/export > + * > + * then we can control it with > + * echo [M2 value] > /sys/class/gpio/gpio[yyy]/value > + * echo [M1 value] > /sys/class/gpio/gpio[yyy+1]/value > + * echo [M0(SD) value] > /sys/class/gpio/gpio[yyy+2]/value > + * which M0(SD)/M1/M2 as your desired value, value is only 0 or 1. > + * > + * When configure complete, It's a must to free all gpio by > + * echo yyy > /sys/class/gpio/unexport > + * echo yyy+1 > /sys/class/gpio/unexport > + * echo yyy+2 > /sys/class/gpio/unexport > + * > + * The driver will "save" gpio configure after we release > + * all gpio of a serial port. > + * > + * For examples to change mode & gpio with F81532/534 > + * Evalaution Board. > + * > + * F81532 EVB > + * port0: F81437 (RS232 only) > + * port1: F81439 (RS232/RS485/RS422 ... etc.) > + * F81534 EVB > + * port0/1: F81437 (RS232 only) > + * port2/3: F81439 (RS232/RS485/RS422 ... etc.) > + * > + * 1. RS232 Mode (Default IC Mode) > + * 1. Set struct serial_rs485 flags "without" SER_RS485_ENABLED > + * (control F81532/534 RTS control) > + * 2. Set M0(SD)/M1/M2 as 0/0/1 > + * (control F81532/534 output pin to control transceiver mode) > + * > + * 2. RS485 Mode (RTS Low when TX Mode) > + * 1. Set struct serial_rs485 flags with SER_RS485_ENABLED > + * 2. Set M0(SD)/M1/M2 as 0/1/0 > + * > + * 3. RS485 Mode (RTS High when TX Mode) > + * 1. Set struct serial_rs485 flags with SER_RS485_ENABLED and > + * SER_RS485_RTS_ON_SEND > + * 2. Set M0(SD)/M1/M2 as 0/1/1 > + * > + * 4. RS422 Mode > + * 1. The RTS mode is dont care. > + * 2. Set M0(SD)/M1/M2 as 0/0/0 > + * > + * Please reference https://bitbucket.org/hpeter/fintek-general/src/ > + * with f81534/tools to get set_gpio.c & set_mode.c. Please use it > + * carefully. Would it be good to have this under Documentation ? > + */ > + > +#include <linux/errno.h> > +#include <linux/slab.h> > +#include <linux/tty.h> > +#include <linux/tty_flip.h> > +#include <linux/serial.h> > +#include <linux/usb.h> > +#include <linux/usb/serial.h> > +#include <linux/serial_reg.h> > +#include <linux/kfifo.h> > +#include <linux/gpio.h> > + > +/* Serial Port register Address */ > +#define SERIAL_BASE_ADDRESS 0x1200 > +#define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS) > +#define TRANSMIT_HOLDING_REGISTER (0x00 + SERIAL_BASE_ADDRESS) > +#define DIVISOR_LATCH_LSB (0x00 + SERIAL_BASE_ADDRESS) > +#define INTERRUPT_ENABLE_REGISTER (0x01 + SERIAL_BASE_ADDRESS) > +#define DIVISOR_LATCH_MSB (0x01 + SERIAL_BASE_ADDRESS) > +#define INTERRUPT_IDENT_REGISTER (0x02 + SERIAL_BASE_ADDRESS) > +#define FIFO_CONTROL_REGISTER (0x02 + SERIAL_BASE_ADDRESS) > +#define LINE_CONTROL_REGISTER (0x03 + SERIAL_BASE_ADDRESS) > +#define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS) > +#define LINE_STATUS_REGISTER (0x05 + SERIAL_BASE_ADDRESS) > +#define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS) > +#define CLK_SEL_REGISTER (0x08 + SERIAL_BASE_ADDRESS) > +#define CONFIG1_REGISTER (0x09 + SERIAL_BASE_ADDRESS) > +#define SADDRESS_REGISTER (0x0a + SERIAL_BASE_ADDRESS) > +#define SADEN_REGISTER (0x0b + SERIAL_BASE_ADDRESS) > + > +#define IER_DMA_TX_EN BIT(7) > +#define IER_DMA_RX_EN BIT(6) > + > +#define F81534_DEF_CONF_ADDRESS_START 0x3000 > +#define F81534_DEF_CONF_SIZE 8 > + > +#define F81534_CUSTOM_ADDRESS_START 0x2f00 > +#define F81534_CUSTOM_TOTAL_SIZE 0x10 > +#define F81534_CUSTOM_DATA_SIZE 0x10 > +#define F81534_CUSTOM_MAX_IDX \ > + (F81534_CUSTOM_TOTAL_SIZE/F81534_CUSTOM_DATA_SIZE) Does it fit one line? > +#define F81534_CUSTOM_NO_CUSTOM_DATA (-1) > +#define F81534_CUSTOM_VALID_TOKEN 0xf0 > +#define F81534_CONF_OFFSET 1 > +#define F81534_CONF_SIZE 4 > + > +#define F81534_MAX_DATA_BLOCK 64 > +#define F81534_MAX_BUS_RETRY 2000 > + > +/* default URB timeout for usb operations */ > +#define F81534_USB_MAX_RETRY 10 > +#define F81534_USB_TIMEOUT 1000 > +#define F81534_CONTROL_BYTE 0x1B > +#define F81534_SET_GET_REGISTER 0xA0 > + > +#define F81534_NUM_PORT 4 > +#define F81534_UNUSED_PORT 0xff > +#define F81534_WRITE_BUFFER_SIZE 512 > + > +#define IC_NAME "f81534" > +#define DRIVER_DESC \ > + "Fintek USB to Serial Ports Driver (F81532/F81534-Evaluation Board)" > +#define FINTEK_VENDOR_ID_1 0x1934 > +#define FINTEK_VENDOR_ID_2 0x2C42 > +#define FINTEK_DEVICE_ID 0x1202 /* RS232 four port */ > +#define F81534_MAX_TX_SIZE 100 > +#define F81534_FIFO_SIZE 128 > +#define F81534_RECEIVE_BLOCK_SIZE 128 > + > +#define F81534_TOKEN_RECEIVE 0x01 > +#define F81534_TOKEN_WRITE 0x02 > +#define F81534_TOKEN_TX_EMPTY 0x03 > +#define F81534_TOKEN_MSR_CHANGE 0x04 > + > +#define F81534_BUS_BUSY 0x03 > +#define F81534_BUS_IDLE 0x04 > +#define F81534_BUS_READ_DATA 0x1004 > +#define F81534_BUS_REG_STATUS 0x1003 > +#define F81534_BUS_REG_START 0x1002 > +#define F81534_BUS_REG_END 0x1001 > + > +#define F81534_CMD_READ 0x03 > +#define F81534_CMD_ENABLE_WR 0x06 > +#define F81534_CMD_PROGRAM 0x02 > +#define F81534_CMD_ERASE 0x20 > +#define F81534_CMD_READ_STATUS 0x05 > + > +#define F81534_MEDIA_BUSY_STATUS 0x03 > + > +#define F81534_1X_RXTRIGGER 0xc3 > +#define F81534_8X_RXTRIGGER 0xcf > + > +#define F81534_DEFAULT_BAUD_RATE 9600 > +#define F81534_MAX_BAUDRATE 1500000 > + > +#define F81534_DELAY_READ_MSR 10 > + > +#define F81534_RS232_FLAG 0x00 > +#define F81534_RS485_FLAG 0x03 > +#define F81534_RS485_1_FLAG 0x01 > +#define F81534_MODE_MASK 0x03 > +#define F81534_PORT_CONF_RS485 BIT(0) > +#define F81534_PORT_CONF_RS485_INVERT BIT(1) > +#define F81534_PORT_CONF_DISABLE_PORT BIT(3) > +#define F81534_PORT_CONF_NOT_EXIST_PORT BIT(7) > +#define F81534_PORT_UNAVAILABLE \ > + (F81534_PORT_CONF_DISABLE_PORT | F81534_PORT_CONF_NOT_EXIST_PORT) > + > +#define F81534_RS485_MODE BIT(4) > +#define F81534_RS485_INVERT BIT(5) > + > +#define F81534_PIN_SET_DEFAULT 0x01 > +#define F81534_PIN_SET_MAX 0x07 > +#define F81534_PIN_SET_MIN 0x00 > + > +/* > + * For older configuration use. We'll transform it to newer setting after > + * load it. > + */ > +#define F81534_OLD_CONFIG_37 0x37 > +#define F81534_OLD_CONFIG_38 0x38 > +#define F81534_OLD_CONFIG_39 0x39 > + > +enum uart_mode { > + uart_mode_rs422, > + uart_mode_rs232, > + uart_mode_rs485, > + uart_mode_rs485_1, > + uart_mode_rs422_term, > + uart_mode_rs232_coexist, > + uart_mode_rs485_1_term, > + uart_mode_shutdown, > + uart_mode_invalid, > +}; > + > +struct f81534_pin_config_data { > + enum uart_mode force_uart_mode; > + u8 gpio_mode; > + const int address[9]; > + const int offset[9]; > +}; > + > +/* Save for a control register and bit offset */ > +struct reg_value { > + const u16 reg_address; > + const u16 reg_offset; > + const u16 reg_bit; > +}; > + > +/* 3 control register to configuration a output pin mode and value */ > +struct pin_data { > + struct reg_value port_mode_1; > + struct reg_value port_mode_0; > + struct reg_value port_io; > +}; > + > +/* 3 output pins to control transceiver mode */ > +struct out_pin { > + struct pin_data m1; > + struct pin_data m2; > + struct pin_data m0_sd; > +}; > + > +struct io_map_value { > + int product_id; > + int max_port; > + enum uart_mode mode; > + struct out_pin port[MAX_NUM_PORTS + 1]; > +}; > + > +/* > + * The following magic numbers is F81532/534 output pin > + * register maps > + */ > +static const struct io_map_value f81534_rs232_control = { > + FINTEK_DEVICE_ID, F81534_NUM_PORT, uart_mode_rs232, > + { > + /* please reference f81439 io port */ > + { > + {{0x2ad5, 4, 0}, {0x2ad4, 4, 1}, {0x2a90, 4, 0},}, > + {{0x2ad5, 5, 0}, {0x2ad4, 5, 1}, {0x2a90, 5, 0},}, > + {{0x2add, 7, 0}, {0x2adc, 7, 1}, {0x2ae8, 7, 1},}, > + }, > + { > + {{0x2add, 3, 0}, {0x2adc, 3, 1}, {0x2ae8, 3, 0},}, > + {{0x2add, 0, 0}, {0x2adc, 0, 1}, {0x2ae8, 0, 0},}, > + {{0x2add, 6, 0}, {0x2adc, 6, 1}, {0x2ae8, 6, 1},}, > + }, > + { > + {{0x2ad3, 6, 0}, {0x2ad2, 6, 1}, {0x2a80, 6, 0},}, > + {{0x2add, 2, 0}, {0x2adc, 2, 1}, {0x2ae8, 2, 0},}, > + {{0x2ad5, 0, 0}, {0x2ad4, 0, 1}, {0x2a90, 0, 1},}, > + }, > + { > + {{0x2ad5, 1, 0}, {0x2ad4, 1, 1}, {0x2a90, 1, 0},}, > + {{0x2ad5, 2, 0}, {0x2ad4, 2, 1}, {0x2a90, 2, 0},}, > + {{0x2ad5, 3, 0}, {0x2ad4, 3, 1}, {0x2a90, 3, 1},}, > + }, > + }, > +}; > + > +static const struct io_map_value f81534_rs485_control = { > + FINTEK_DEVICE_ID, F81534_NUM_PORT, uart_mode_rs485, > + { > + /* please reference f81439 io port */ > + { > + {{0x2ad5, 4, 0}, {0x2ad4, 4, 1}, {0x2a90, 4, 0},}, > + {{0x2ad5, 5, 0}, {0x2ad4, 5, 1}, {0x2a90, 5, 1},}, > + {{0x2add, 7, 0}, {0x2adc, 7, 1}, {0x2ae8, 7, 0},}, > + }, > + { > + {{0x2add, 3, 0}, {0x2adc, 3, 1}, {0x2ae8, 3, 0},}, > + {{0x2add, 0, 0}, {0x2adc, 0, 1}, {0x2ae8, 0, 1},}, > + {{0x2add, 6, 0}, {0x2adc, 6, 1}, {0x2ae8, 6, 0},}, > + }, > + { > + {{0x2ad3, 6, 0}, {0x2ad2, 6, 1}, {0x2a80, 6, 0},}, > + {{0x2add, 2, 0}, {0x2adc, 2, 1}, {0x2ae8, 2, 1},}, > + {{0x2ad5, 0, 0}, {0x2ad4, 0, 1}, {0x2a90, 0, 0},}, > + }, > + { > + {{0x2ad5, 1, 0}, {0x2ad4, 1, 1}, {0x2a90, 1, 0},}, > + {{0x2ad5, 2, 0}, {0x2ad4, 2, 1}, {0x2a90, 2, 1},}, > + {{0x2ad5, 3, 0}, {0x2ad4, 3, 1}, {0x2a90, 3, 0},}, > + }, > + }, > +}; > + > +static const struct io_map_value f81534_rs485_1_control = { > + FINTEK_DEVICE_ID, F81534_NUM_PORT, uart_mode_rs485_1, > + { > + /* please reference f81439 io port */ > + { > + {{0x2ad5, 4, 0}, {0x2ad4, 4, 1}, {0x2a90, 4, 0},}, > + {{0x2ad5, 5, 0}, {0x2ad4, 5, 1}, {0x2a90, 5, 1},}, > + {{0x2add, 7, 0}, {0x2adc, 7, 1}, {0x2ae8, 7, 1},}, > + }, > + { > + {{0x2add, 3, 0}, {0x2adc, 3, 1}, {0x2ae8, 3, 0},}, > + {{0x2add, 0, 0}, {0x2adc, 0, 1}, {0x2ae8, 0, 1},}, > + {{0x2add, 6, 0}, {0x2adc, 6, 1}, {0x2ae8, 6, 1},}, > + }, > + { > + {{0x2ad3, 6, 0}, {0x2ad2, 6, 1}, {0x2a80, 6, 0},}, > + {{0x2add, 2, 0}, {0x2adc, 2, 1}, {0x2ae8, 2, 1},}, > + {{0x2ad5, 0, 0}, {0x2ad4, 0, 1}, {0x2a90, 0, 1},}, > + }, > + { > + {{0x2ad5, 1, 0}, {0x2ad4, 1, 1}, {0x2a90, 1, 0},}, > + {{0x2ad5, 2, 0}, {0x2ad4, 2, 1}, {0x2a90, 2, 1},}, > + {{0x2ad5, 3, 0}, {0x2ad4, 3, 1}, {0x2a90, 3, 1},}, > + }, > + }, > +}; > + > +static const struct io_map_value f81534_rs422_control = { > + FINTEK_DEVICE_ID, F81534_NUM_PORT, uart_mode_rs422, > + { > + /* please reference f81439 io port */ > + { > + {{0x2ad5, 4, 0}, {0x2ad4, 4, 1}, {0x2a90, 4, 0},}, > + {{0x2ad5, 5, 0}, {0x2ad4, 5, 1}, {0x2a90, 5, 0},}, > + {{0x2add, 7, 0}, {0x2adc, 7, 1}, {0x2ae8, 7, 0},}, > + }, > + { > + {{0x2add, 3, 0}, {0x2adc, 3, 1}, {0x2ae8, 3, 0},}, > + {{0x2add, 0, 0}, {0x2adc, 0, 1}, {0x2ae8, 0, 0},}, > + {{0x2add, 6, 0}, {0x2adc, 6, 1}, {0x2ae8, 6, 0},}, > + }, > + { > + {{0x2ad3, 6, 0}, {0x2ad2, 6, 1}, {0x2a80, 6, 0},}, > + {{0x2add, 2, 0}, {0x2adc, 2, 1}, {0x2ae8, 2, 0},}, > + {{0x2ad5, 0, 0}, {0x2ad4, 0, 1}, {0x2a90, 0, 0},}, > + }, > + { > + {{0x2ad5, 1, 0}, {0x2ad4, 1, 1}, {0x2a90, 1, 0},}, > + {{0x2ad5, 2, 0}, {0x2ad4, 2, 1}, {0x2a90, 2, 0},}, > + {{0x2ad5, 3, 0}, {0x2ad4, 3, 1}, {0x2a90, 3, 0},}, > + }, > + }, > +}; > + > +static const struct io_map_value f81534_shutdown_control = { > + FINTEK_DEVICE_ID, F81534_NUM_PORT, uart_mode_shutdown, > + { > + /* please reference f81439 io port */ > + { > + {{0x2ad5, 4, 0}, {0x2ad4, 4, 1}, {0x2a90, 4, 1},}, > + {{0x2ad5, 5, 0}, {0x2ad4, 5, 1}, {0x2a90, 5, 1},}, > + {{0x2add, 7, 0}, {0x2adc, 7, 1}, {0x2ae8, 7, 1},}, > + }, > + { > + {{0x2add, 3, 0}, {0x2adc, 3, 1}, {0x2ae8, 3, 1},}, > + {{0x2add, 0, 0}, {0x2adc, 0, 1}, {0x2ae8, 0, 1},}, > + {{0x2add, 6, 0}, {0x2adc, 6, 1}, {0x2ae8, 6, 1},}, > + }, > + { > + {{0x2ad3, 6, 0}, {0x2ad2, 6, 1}, {0x2a80, 6, 1},}, > + {{0x2add, 2, 0}, {0x2adc, 2, 1}, {0x2ae8, 2, 1},}, > + {{0x2ad5, 0, 0}, {0x2ad4, 0, 1}, {0x2a90, 0, 1},}, > + }, > + { > + {{0x2ad5, 1, 0}, {0x2ad4, 1, 1}, {0x2a90, 1, 1},}, > + {{0x2ad5, 2, 0}, {0x2ad4, 2, 1}, {0x2a90, 2, 1},}, > + {{0x2ad5, 3, 0}, {0x2ad4, 3, 1}, {0x2a90, 3, 1},}, > + }, > + }, > +}; > + > +static const struct io_map_value f81534_rs422_term_control = { > + FINTEK_DEVICE_ID, F81534_NUM_PORT, uart_mode_shutdown, > + { > + /* please reference f81439 io port */ > + { > + {{0x2ad5, 4, 0}, {0x2ad4, 4, 1}, {0x2a90, 4, 1},}, > + {{0x2ad5, 5, 0}, {0x2ad4, 5, 1}, {0x2a90, 5, 0},}, > + {{0x2add, 7, 0}, {0x2adc, 7, 1}, {0x2ae8, 7, 0},}, > + }, > + { > + {{0x2add, 3, 0}, {0x2adc, 3, 1}, {0x2ae8, 3, 1},}, > + {{0x2add, 0, 0}, {0x2adc, 0, 1}, {0x2ae8, 0, 0},}, > + {{0x2add, 6, 0}, {0x2adc, 6, 1}, {0x2ae8, 6, 0},}, > + }, > + { > + {{0x2ad3, 6, 0}, {0x2ad2, 6, 1}, {0x2a80, 6, 1},}, > + {{0x2add, 2, 0}, {0x2adc, 2, 1}, {0x2ae8, 2, 0},}, > + {{0x2ad5, 0, 0}, {0x2ad4, 0, 1}, {0x2a90, 0, 0},}, > + }, > + { > + {{0x2ad5, 1, 0}, {0x2ad4, 1, 1}, {0x2a90, 1, 1},}, > + {{0x2ad5, 2, 0}, {0x2ad4, 2, 1}, {0x2a90, 2, 0},}, > + {{0x2ad5, 3, 0}, {0x2ad4, 3, 1}, {0x2a90, 3, 0},}, > + }, > + }, > +}; > + > +static const struct io_map_value f81534_rs232_coexist_control = { > + FINTEK_DEVICE_ID, F81534_NUM_PORT, uart_mode_shutdown, > + { > + /* please reference f81439 io port */ > + { > + {{0x2ad5, 4, 0}, {0x2ad4, 4, 1}, {0x2a90, 4, 1},}, > + {{0x2ad5, 5, 0}, {0x2ad4, 5, 1}, {0x2a90, 5, 0},}, > + {{0x2add, 7, 0}, {0x2adc, 7, 1}, {0x2ae8, 7, 1},}, > + }, > + { > + {{0x2add, 3, 0}, {0x2adc, 3, 1}, {0x2ae8, 3, 1},}, > + {{0x2add, 0, 0}, {0x2adc, 0, 1}, {0x2ae8, 0, 0},}, > + {{0x2add, 6, 0}, {0x2adc, 6, 1}, {0x2ae8, 6, 1},}, > + }, > + { > + {{0x2ad3, 6, 0}, {0x2ad2, 6, 1}, {0x2a80, 6, 1},}, > + {{0x2add, 2, 0}, {0x2adc, 2, 1}, {0x2ae8, 2, 0},}, > + {{0x2ad5, 0, 0}, {0x2ad4, 0, 1}, {0x2a90, 0, 1},}, > + }, > + { > + {{0x2ad5, 1, 0}, {0x2ad4, 1, 1}, {0x2a90, 1, 1},}, > + {{0x2ad5, 2, 0}, {0x2ad4, 2, 1}, {0x2a90, 2, 0},}, > + {{0x2ad5, 3, 0}, {0x2ad4, 3, 1}, {0x2a90, 3, 1},}, > + }, > + }, > +}; > + > +static const struct io_map_value f81534_rs485_1_term_control = { > + FINTEK_DEVICE_ID, F81534_NUM_PORT, uart_mode_shutdown, > + { > + /* please reference f81439 io port */ > + { > + {{0x2ad5, 4, 0}, {0x2ad4, 4, 1}, {0x2a90, 4, 1},}, > + {{0x2ad5, 5, 0}, {0x2ad4, 5, 1}, {0x2a90, 5, 1},}, > + {{0x2add, 7, 0}, {0x2adc, 7, 1}, {0x2ae8, 7, 0},}, > + }, > + { > + {{0x2add, 3, 0}, {0x2adc, 3, 1}, {0x2ae8, 3, 1},}, > + {{0x2add, 0, 0}, {0x2adc, 0, 1}, {0x2ae8, 0, 1},}, > + {{0x2add, 6, 0}, {0x2adc, 6, 1}, {0x2ae8, 6, 0},}, > + }, > + { > + {{0x2ad3, 6, 0}, {0x2ad2, 6, 1}, {0x2a80, 6, 1},}, > + {{0x2add, 2, 0}, {0x2adc, 2, 1}, {0x2ae8, 2, 1},}, > + {{0x2ad5, 0, 0}, {0x2ad4, 0, 1}, {0x2a90, 0, 0},}, > + }, > + { > + {{0x2ad5, 1, 0}, {0x2ad4, 1, 1}, {0x2a90, 1, 1},}, > + {{0x2ad5, 2, 0}, {0x2ad4, 2, 1}, {0x2a90, 2, 1},}, > + {{0x2ad5, 3, 0}, {0x2ad4, 3, 1}, {0x2a90, 3, 0},}, > + }, > + }, > +}; > + > +static const struct io_map_value *f81534_mode_control[uart_mode_invalid] = { > + &f81534_rs422_control, > + &f81534_rs232_control, > + &f81534_rs485_control, > + &f81534_rs485_1_control, > + &f81534_rs422_term_control, > + &f81534_rs232_coexist_control, > + &f81534_rs485_1_term_control, > + &f81534_shutdown_control, > +}; > + > +static const struct usb_device_id id_table[] = { > + {USB_DEVICE(FINTEK_VENDOR_ID_1, FINTEK_DEVICE_ID)}, > + {USB_DEVICE(FINTEK_VENDOR_ID_2, FINTEK_DEVICE_ID)}, > + {} /* Terminating entry */ > +}; > + > +MODULE_DEVICE_TABLE(usb, id_table); > + > +struct f81534_serial_private { > + bool is_phy_port_not_empty[F81534_NUM_PORT]; > + spinlock_t tx_empty_lock; > + struct mutex change_mode_mutex; > + u8 default_conf_data[F81534_DEF_CONF_SIZE]; > + u32 setting_idx; > + atomic_t port_active[F81534_NUM_PORT]; > +}; > + > +struct f81534_port_private { > + u8 phy; > + u8 shadow_mcr; > + u8 shadow_lcr; > + u32 current_baud_rate; > + u32 current_baud_base; > + struct f81534_pin_config_data port_pin_data; > + struct gpio_chip f81534_gpio_chip; > + atomic_t gpio_active; > + spinlock_t msr_lock; > + struct mutex msr_mutex; > + u8 shadow_msr; > +}; > + > +static int f81534_setup_urbs(struct usb_serial *serial); > + > +static int f81534_set_normal_register(struct usb_device *dev, u16 reg, > + u8 data); > + > +static int f81534_get_normal_register(struct usb_device *dev, u16 reg, > + u8 *data); > + > +static int f81534_set_normal_register_with_delay(struct usb_serial *usbserial, > + u16 reg, u8 data); > + > +static int f81534_get_normal_register_with_delay(struct usb_serial *usbserial, > + u16 reg, u8 *data); > + > +static int f81534_getregister(struct usb_device *dev, u8 uart, u16 reg, > + u8 *data); > + > +static void f81534_dtr_rts(struct usb_serial_port *port, int on); > + > +static int f81534_set_port_mode(struct usb_serial_port *port, > + enum uart_mode eMode); > + > +static int f81534_save_configure_data(struct usb_serial_port *port); > + > +static int f81534_switch_gpio_mode(struct usb_serial_port *port, u8 mode); > + > +static void f81534_wakeup_all_port(struct usb_serial *serial); > + > +static void f81534_compare_msr(struct usb_serial_port *port, u8 *msr, > + bool is_port_open); > + > +static int f81534_prepare_write_buffer(struct usb_serial_port *port, > + void *dest, size_t size); > + > +static int f81534_submit_writer(struct usb_serial_port *port, gfp_t mem_flags); Would it be possible to reshuffle code to reduce amount of forward declarations? > + > +/* > + * Get the current port index of this device. e.g., 0 is the start index of > + * this device. > + */ > +static int f81534_port_index(struct usb_serial_port *port) > +{ > + return port->port_number; > +} > + > +/* > + * Find logic serial port index with H/W phy index mapping > + */ > +static int f81534_phy_to_logic_port(struct usb_serial *serial, int phy) > +{ > + int count = 0, i; > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(serial); > + > + for (i = 0; i < phy; ++i) { > + if (serial_priv->default_conf_data[i] & > + F81534_PORT_UNAVAILABLE) > + continue; > + > + count += 1; count++; > + } > + > + dev_dbg(&serial->dev->dev, "%s: phy:%d count:%d\n", __func__, phy, > + count); > + return count; > +} > + > +static int f81534_command_delay(struct usb_serial *usbserial) > +{ > + unsigned int count = F81534_MAX_BUS_RETRY; > + unsigned char tmp; > + int status; > + struct usb_device *dev = usbserial->dev; > + > + do { > + status = f81534_get_normal_register(dev, F81534_BUS_REG_STATUS, > + &tmp); > + if (status) > + return status; > + > + if (tmp & F81534_BUS_BUSY) > + continue; > + > + if (tmp & F81534_BUS_IDLE) > + break; > + > + } while (--count); > + > + if (!count) > + return -EIO; > + > + status = f81534_set_normal_register(dev, F81534_BUS_REG_STATUS, > + tmp & ~F81534_BUS_IDLE); > + if (status) > + return status; > + > + return 0; > +} > + > +static int f81534_read_data(struct usb_serial *usbserial, u32 address, > + u32 size, unsigned char *buf) > +{ > + u32 count = 0; > + u32 read_size = 0; > + u32 block = 0; > + u8 tmp_buf[F81534_MAX_DATA_BLOCK]; > + int status; > + int offset; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, F81534_CMD_READ); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, (address >> 16) & 0xff); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, (address >> 8) & 0xff); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, (address >> 0) & 0xff); > + if (status) > + return status; > + > + /* continuous read mode */ > + do { > + read_size = min_t(u32, F81534_MAX_DATA_BLOCK, size); > + > + for (count = 0; count < read_size; ++count) { > + Redundant empty line. > + if ((size <= F81534_MAX_DATA_BLOCK) && > + (read_size == (count + 1))) { No need to have internal parens. > + /* > + * dummy code, force IC to generate a read > + * pulse, the set of value 0xf1 is dont care > + * (any value is ok) > + */ > + status = f81534_set_normal_register_with_delay( > + usbserial, F81534_BUS_REG_END, > + 0xf1); > + if (status) > + return status; Same like below, refactor this. > + } else { > + /* > + * dummy code, force IC to generate a read > + * pulse, the set of value 0xf1 is dont care > + * (any value is ok) > + */ > + status = f81534_set_normal_register_with_delay( > + usbserial, > + F81534_BUS_REG_START, 0xf1); > + if (status) > + return status; ...and this. > + } > + > + status = f81534_get_normal_register_with_delay( > + usbserial, > + F81534_BUS_READ_DATA, > + &tmp_buf[count]); > + if (status) > + return status; > + > + offset = count + (block * F81534_MAX_DATA_BLOCK); Useless parens. > + buf[offset] = tmp_buf[count]; > + } > + > + size -= read_size; > + block += 1; > + } while (size); > + > + return 0; > +} > + > +/* > + * This function maybe cause IC no workable, Please take this carefully. > + * > + * The function is used to modify the configuration area of this device > + * (F81534_CUSTOM_ADDRESS_START). If wrong operation with this function, it'll > + * make the device malfuncional. > + */ > +static int f81534_write_data(struct usb_serial *usbserial, int address, > + int size, unsigned char *buf) > +{ > + unsigned int count = 0; Useless assignment. > + unsigned int write_size = 0; Ditto. > + unsigned int block = 0; > + int offset; > + int status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_END, F81534_CMD_ENABLE_WR); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, F81534_CMD_PROGRAM); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, (address >> 16) & 0xff); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, (address >> 8) & 0xff); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, (address >> 0) & 0xff); > + if (status) > + return status; > + > + do { > + write_size = min(F81534_MAX_DATA_BLOCK, size); > + > + for (count = 0; count < write_size; ++count) { > + offset = count + block * F81534_MAX_DATA_BLOCK; > + > + if ((size <= F81534_MAX_DATA_BLOCK) > + && (write_size == (count + 1))) { It seems you like parens too much. > + status = f81534_set_normal_register_with_delay( > + usbserial, > + F81534_BUS_REG_END, > + buf[offset]); > + if (status) > + return status; (1) > + } else { > + status = f81534_set_normal_register_with_delay( > + usbserial, > + F81534_BUS_REG_START, > + buf[offset]); > + if (status) > + return status; (2) > + } It would be an equivalent if you do once it here instead of (1) and (2) > + } > + > + size -= write_size; > + block += 1; block++; > + } while (size); > + > + return 0; > +} > + > +/* > + * This function maybe cause IC no workable, Please take this carefully. > + * > + * The function is used to clear the configuration area of this device > + * (F81534_CUSTOM_ADDRESS_START). If wrong operation with this function, it'll > + * make the device malfuncional. > + */ > +static int f81534_erase_sector(struct usb_serial *usbserial, int address) > +{ > + u8 current_status = 0; > + int status; > + unsigned int count = F81534_MAX_BUS_RETRY; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_END, F81534_CMD_ENABLE_WR); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, F81534_CMD_ERASE); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, (address >> 16) & 0xff); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, (address >> 8) & 0xff); > + if (status) > + return status; > + > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_END, (address >> 0) & 0xff); > + if (status) > + return status; > + > + while (--count) { > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_START, > + F81534_CMD_READ_STATUS); > + if (status) > + return status; > + > + /* dummy write, any value is acceptable */ > + status = f81534_set_normal_register_with_delay(usbserial, > + F81534_BUS_REG_END, 0xff); > + if (status) > + return status; > + > + status = f81534_get_normal_register_with_delay(usbserial, > + F81534_BUS_READ_DATA, ¤t_status); > + if (status) > + return status; > + > + if (!(F81534_MEDIA_BUSY_STATUS & current_status)) { > + dev_dbg(&usbserial->dev->dev, > + "%s: data:%x, count:%d, ok\n", > + __func__, current_status, count); > + break; > + } > + } > + > + return 0; > +} > + > +static int f81534_gpio_get(struct gpio_chip *chip, unsigned gpio_num) > +{ > + struct usb_serial_port *port = > + container_of(chip->dev, struct usb_serial_port, dev); > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(port->serial); > + int current_mode; > + int status; > + > + status = mutex_lock_interruptible(&serial_priv->change_mode_mutex); > + if (status) { > + dev_err(&port->dev, "%s: interrupted!\n", __func__); > + return status; > + } > + > + current_mode = port_priv->port_pin_data.gpio_mode; > + current_mode &= BIT(gpio_num); One line? > + > + mutex_unlock(&serial_priv->change_mode_mutex); > + f81534_wakeup_all_port(port->serial); > + > + return !!current_mode; > +} > + > +static int f81534_gpio_direction_in(struct gpio_chip *chip, unsigned gpio_num) > +{ > + /* always failed */ > + return -EINVAL; > +} > + > +static int f81534_gpio_direction_out(struct gpio_chip *chip, > + unsigned gpio_num, int val) > +{ > + /* always successful */ > + return 0; > +} > + > +static void f81534_gpio_set(struct gpio_chip *chip, unsigned gpio_num, int val) > +{ > + struct usb_serial_port *port = container_of( > + chip->dev, struct usb_serial_port, dev); > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(port->serial); > + int current_mode; > + int status; > + > + status = mutex_lock_interruptible(&serial_priv->change_mode_mutex); > + if (status) { > + dev_err(&port->dev, "%s: interrupted!\n", __func__); > + return; > + } > + > + current_mode = port_priv->port_pin_data.gpio_mode; > + current_mode &= ~BIT(gpio_num); > + current_mode |= val ? BIT(gpio_num) : 0; > + > + status = f81534_switch_gpio_mode(port, current_mode); > + if (status) { > + dev_err(&port->dev, "%s: set gpio error!!\n", __func__); > + goto out; > + } > + > + dev_dbg(&port->dev, "%s: num: %d, val:%d\n", __func__, gpio_num, val); > + port_priv->port_pin_data.gpio_mode = current_mode; > + > +out: > + mutex_unlock(&serial_priv->change_mode_mutex); > + f81534_wakeup_all_port(port->serial); > +} > + > +static int f81534_gpio_get_direction(struct gpio_chip *chip, unsigned offset) > +{ > + /* F81532/534 provide output only output port */ > + return GPIOF_DIR_OUT; > +} > + > +static int f81534_gpio_request(struct gpio_chip *chip, unsigned offset) > +{ > + struct usb_serial_port *port = container_of( > + chip->dev, struct usb_serial_port, dev); chip->dev may be left on previous line. > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + > + /* add current actives gpio */ > + atomic_inc(&port_priv->gpio_active); > + return 0; > +} > + > +static void f81534_gpio_free(struct gpio_chip *chip, unsigned offset) > +{ > + struct usb_serial_port *port = container_of( > + chip->dev, struct usb_serial_port, dev); Ditto. > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(port->serial); > + int status; > + > + /* if no current actives gpio, save to IC */ > + if (atomic_dec_return(&port_priv->gpio_active) != 0) > + return; > + > + status = mutex_lock_interruptible(&serial_priv->change_mode_mutex); > + if (status) { > + dev_err(&port->dev, "%s: interrupted!\n", __func__); > + return; > + } > + > + f81534_save_configure_data(port); > + > + mutex_unlock(&serial_priv->change_mode_mutex); > + f81534_wakeup_all_port(port->serial); > +} > + > +static struct gpio_chip f81534_gpio_chip_templete = { > + .owner = THIS_MODULE, > + .get_direction = f81534_gpio_get_direction, > + .get = f81534_gpio_get, > + .direction_input = f81534_gpio_direction_in, > + .set = f81534_gpio_set, > + .direction_output = f81534_gpio_direction_out, > + .request = f81534_gpio_request, > + .free = f81534_gpio_free, > + .ngpio = 3, /*M0(SD)/M1/M2*/ Spaces after and before comment markers. > + .base = -1, > +}; > + > +static void f81534_wakeup_all_port(struct usb_serial *serial) > +{ > + int i; > + int status; > + > + for (i = 0; i < serial->num_ports; ++i) { > + if (serial->port[i]) { Perhaps if (!serial->port[i[) continue; ? > + status = f81534_submit_writer(serial->port[i], > + GFP_KERNEL); > + if (status) { > + dev_err(&serial->port[i]->dev, > + "%s: submit failed\n", > + __func__); > + } > + } > + } > +} > + > +static int f81534_calc_baud_divisor(u32 baudrate, u32 clockrate, u32 *remain) > +{ > + u32 divisor, rem; > + > + if (!baudrate) > + return 0; > + > + rem = clockrate % baudrate; > + > + if (remain) > + *remain = rem; > + > + /* Round to nearest divisor */ > + divisor = DIV_ROUND_CLOSEST(clockrate, baudrate); > + > + return divisor; > +} > + > +static int f81534_get_normal_register(struct usb_device *dev, u16 reg, > + u8 *data) > +{ > + int count = F81534_USB_MAX_RETRY; > + int status; > + u8 *tmp; > + > + tmp = kmalloc(sizeof(u8), GFP_KERNEL); > + if (!tmp) > + return -ENOMEM; > + > + /* > + * Our device maybe not reply when heavily loading, > + * We'll retry for F81534_USB_MAX_RETRY times > + */ > + while (count--) { > + status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), > + F81534_SET_GET_REGISTER, > + USB_TYPE_VENDOR | USB_DIR_IN, > + reg, 0, tmp, sizeof(u8), > + F81534_USB_TIMEOUT); > + if (status <= 0) { > + if (status == 0) > + status = -EIO; > + } else { > + break; > + } > + } > + > + if ((count <= 0) && (status <= 0)) { > + dev_err(&dev->dev, "%s ERROR reg:%x status:%i failed\n", > + __func__, reg, status); > + kfree(tmp); > + return status; > + } > + > + *data = *tmp; > + kfree(tmp); > + return 0; > +} > + > +static int f81534_get_normal_register_with_delay(struct usb_serial *usbserial, > + u16 reg, u8 *data) > +{ > + int status; > + struct usb_device *dev = usbserial->dev; > + > + status = f81534_get_normal_register(dev, reg, data); > + if (status) > + return status; > + > + status = f81534_command_delay(usbserial); > + if (status) > + return status; > + > + return 0; > +} > + > +static int f81534_set_normal_register(struct usb_device *dev, u16 reg, u8 data) > +{ > + int count = F81534_USB_MAX_RETRY; > + int status = 0; > + u8 *tmp; > + > + tmp = kmalloc(sizeof(u8), GFP_KERNEL); > + if (!tmp) > + return -ENOMEM; > + > + *tmp = data; > + > + /* > + * Our device maybe not reply when heavily loading, > + * We'll retry for F81534_USB_MAX_RETRY times > + */ > + while (count--) { > + status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), > + F81534_SET_GET_REGISTER, > + USB_TYPE_VENDOR | USB_DIR_OUT, > + reg, 0, tmp, sizeof(u8), > + F81534_USB_TIMEOUT); > + if (status <= 0) { > + if (status == 0) > + status = -EIO; This is makes sense only on last round, so, means invariant, why not to refactor this? while () { if (status > 0) break; ... } if (!count) { } While is better do with while (--count) or do { } while (--count); if you want one cycle more. > + } else { > + break; > + } > + } > + > + if ((count <= 0) && status) { > + dev_err(&dev->dev, > + "%s ERROR reg:%x data:0x%x status:%i failed\n", > + __func__, reg, data, status); > + kfree(tmp); > + return status; > + } > + > + kfree(tmp); > + return 0; > +} > + > +static int f81534_set_normal_register_with_delay(struct usb_serial *usbserial, > + u16 reg, u8 data) > +{ > + int status; > + struct usb_device *dev = usbserial->dev; > + > + status = f81534_set_normal_register(dev, reg, data); > + if (status) > + return status; > + > + status = f81534_command_delay(usbserial); > + if (status) > + return status; > + > + return 0; > +} > + > +static int f81534_setregister(struct usb_device *dev, u8 uart, u16 reg, > + u8 data) > +{ > + int status; > + > + status = f81534_set_normal_register(dev, reg + uart * 0x10, data); > + if (status) > + return status; > + > + return 0; return func(); > +} > + > +static int f81534_set_port_config(struct usb_device *dev, u8 port_number, > + struct usb_serial_port *port, > + u32 baudrate, u16 lcr) > +{ > + struct usb_serial *serial = port->serial; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + u16 device_port = port_priv->phy; > + u32 divisor; > + u32 rem, baud_base; > + int status, count; > + u8 value; > + bool is_485_mode = false; > + bool is_need_invert = false; > + static u32 const baudrate_table[3] = { 1500000, 1152000, 921600}; > + static u8 const clock_table[3] = { 0x05, 0x03, 0x07}; > + > + switch (port_priv->port_pin_data.force_uart_mode) { > + case uart_mode_rs232: > + case uart_mode_shutdown: > + case uart_mode_rs232_coexist: > + case uart_mode_invalid: > + break; > + Is empty line here needed? > + case uart_mode_rs485: > + is_need_invert = true; > + default: > + is_485_mode = true; > + break; > + } > + > + if (baudrate <= 115200) { > + value = 0x01; /* 1.846m fixed */ > + divisor = f81534_calc_baud_divisor(baudrate, 115200, NULL); > + port_priv->current_baud_base = 115200; > + } else { > + for (count = 0; count < ARRAY_SIZE(baudrate_table) ; ++count) { > + baud_base = baudrate_table[count]; > + divisor = f81534_calc_baud_divisor(baudrate, baud_base, > + &rem); > + if (!rem) { > + dev_dbg(&port->dev, "%s: found clockbase %d\n", > + __func__, > + baudrate_table[count]); > + value = clock_table[count]; > + port_priv->current_baud_base = baud_base; > + break; > + } > + } Can you calculate baud rates more precisely? Any link to datasheet where it's described? > + > + if (count >= ARRAY_SIZE(baudrate_table)) { > + dev_err(&port->dev, > + "%s: cant find suitable clockbase\n", > + __func__); > + return -EINVAL; > + } > + } > + > + value &= ~(F81534_RS485_MODE | F81534_RS485_INVERT); > + value |= is_485_mode ? F81534_RS485_MODE : 0; > + value |= is_need_invert ? F81534_RS485_INVERT : 0; > + > + status = f81534_setregister(serial->dev, device_port, CLK_SEL_REGISTER, > + value); > + if (status) { > + dev_err(&port->dev, "%s: CLK REG setting failed\n", __func__); > + return status; > + } > + > + if (baudrate <= 1200) > + value = F81534_1X_RXTRIGGER; /* 128 FIFO & TL: 1x */ > + else > + value = F81534_8X_RXTRIGGER; /* 128 FIFO & TL: 8x */ > + > + status = f81534_setregister(serial->dev, device_port, CONFIG1_REGISTER, > + 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 if (baudrate >= 1152000) > + value = UART_FCR_R_TRIG_10 | UART_FCR_ENABLE_FIFO; /* TL: 8 */ > + else > + value = UART_FCR_R_TRIG_11 | UART_FCR_ENABLE_FIFO; /* TL: 14 */ > + > + status = f81534_setregister(serial->dev, device_port, > + FIFO_CONTROL_REGISTER, value); > + if (status) { > + dev_err(&port->dev, "%s: FCR setting failed\n", __func__); > + return status; > + } > + > + value = UART_LCR_DLAB; > + status = f81534_setregister(serial->dev, device_port, > + LINE_CONTROL_REGISTER, value); > + if (status) { > + dev_err(&port->dev, "%s: set LCR failed, %d\n", __func__, > + status); > + return status; > + } > + > + value = divisor & 0xFF; > + status = f81534_setregister(serial->dev, device_port, > + DIVISOR_LATCH_LSB, value); > + if (status) { > + dev_err(&port->dev, "%s: set DLAB LSB failed, %d\n", __func__, > + status); > + return status; > + } > + > + value = (divisor >> 8) & 0xFF; > + status = f81534_setregister(serial->dev, device_port, > + DIVISOR_LATCH_MSB, value); > + if (status) { > + dev_err(&port->dev, "%s: set DLAB MSB failed, %d\n", __func__, > + status); > + return status; > + } > + > + status = f81534_setregister(serial->dev, device_port, > + LINE_CONTROL_REGISTER, lcr); > + if (status) { > + dev_err(&port->dev, "%s: set LCR failed, %d\n", __func__, > + status); > + return status; > + } > + > + return 0; > +} > + > +static int f81534_getregister(struct usb_device *dev, u8 uart, u16 reg, > + u8 *data) > +{ > + int status; > + > + status = f81534_get_normal_register(dev, reg + uart * 0x10, data); > + if (status) > + return status; > + return func(); That is it. > + return 0; > +} > + > +static int f81534_update_mctrl(struct usb_serial_port *port, unsigned int set, > + unsigned int clear) > +{ > + struct usb_device *dev = port->serial->dev; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + u8 tmp; > + int status; > + > + status = mutex_lock_interruptible(&port_priv->msr_mutex); > + if (status) { > + dev_info(&port->dev, "%s: interrupted!\n", __func__); > + return status; > + } > + > + if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { > + dev_dbg(&dev->dev, "%s -DTR|RTS not being set|cleared\n", > + __func__); > + mutex_unlock(&port_priv->msr_mutex); > + return 0; /* no change */ > + } > + > + /* '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; > + dev_dbg(&dev->dev, "%s: port:%d clear DTR\n", __func__, > + port_priv->phy); > + } > + > + if (clear & TIOCM_RTS) { > + tmp &= ~UART_MCR_RTS; > + dev_dbg(&dev->dev, "%s: port:%d clear RTS\n", __func__, > + port_priv->phy); > + > + } > + > + if (set & TIOCM_DTR) { > + tmp |= UART_MCR_DTR; > + dev_dbg(&dev->dev, "%s: port:%d set DTR\n", __func__, > + port_priv->phy); > + > + } > + > + if (set & TIOCM_RTS) { > + tmp |= UART_MCR_RTS; > + dev_dbg(&dev->dev, "%s: port:%d set RTS\n", __func__, > + port_priv->phy); > + } > + > + status = f81534_setregister(dev, port_priv->phy, > + MODEM_CONTROL_REGISTER, tmp); > + if (status < 0) { > + dev_err(&port->dev, "%s- Error from MODEM_CTRL URB: %i\n", > + __func__, status); > + mutex_unlock(&port_priv->msr_mutex); > + return status; > + } > + > + port_priv->shadow_mcr = tmp; > + mutex_unlock(&port_priv->msr_mutex); > + return 0; > +} > + > +/* > + * This function will search the data area with token F81534_CUSTOM_VALID_TOKEN > + * for latest configuration index. If nothing found (*index = -1), the caller > + * will load default configure in F81534_DEF_CONF_ADDRESS_START section > + */ > +static int f81534_find_config_idx(struct usb_serial *serial, uintptr_t *index) > +{ > + int idx, status; > + u8 custom_data; > + int offset; > + > + for (idx = F81534_CUSTOM_MAX_IDX - 1; idx >= 0; --idx) { > + offset = F81534_CUSTOM_ADDRESS_START + > + F81534_CUSTOM_DATA_SIZE * idx; > + status = f81534_read_data(serial, offset, 1, &custom_data); > + if (status) { > + dev_err(&serial->dev->dev, > + "%s: read error, idx:%d, status:%d\n", > + __func__, idx, status); > + return status; > + } > + > + /* > + * if had custom setting, override > + * 1st byte is a indicator, 0xff is empty, 0xf0 is had data > + */ > + > + /* found */ > + if (custom_data == F81534_CUSTOM_VALID_TOKEN) > + break; > + } > + > + *index = idx; > + return 0; > +} > + > +static int f81534_calc_num_ports(struct usb_serial *serial) > +{ > + uintptr_t setting_idx; > + int i; > + u8 num_port = 0; > + int status; > + unsigned char setting[F81534_CUSTOM_DATA_SIZE + 1]; > + > + /* check had custom setting */ > + status = f81534_find_config_idx(serial, &setting_idx); > + if (status) { > + dev_err(&serial->dev->dev, > + "%s: f81534_find_config_idx read failed!!\n", > + __func__); > + return 0; > + } > + > + /* Save the configuration area idx as private data for attach() */ > + usb_set_serial_data(serial, (void *) setting_idx); > + > + /* read default board setting */ > + status = f81534_read_data(serial, F81534_DEF_CONF_ADDRESS_START, > + F81534_NUM_PORT, setting); > + if (status) { > + dev_err(&serial->dev->dev, > + "%s: f81534_read_data read failed!!\n", > + __func__); > + return 0; > + } > + > + /* > + * if had custom setting, override it. > + * 1st byte is a indicator, 0xff is empty, F81534_CUSTOM_VALID_TOKEN > + * is had data, then skip with 1st data > + */ > + if (setting_idx != F81534_CUSTOM_NO_CUSTOM_DATA) { > + status = f81534_read_data(serial, > + F81534_CUSTOM_ADDRESS_START + > + F81534_CUSTOM_DATA_SIZE * > + setting_idx + 1, sizeof(setting), > + setting); > + if (status) { > + dev_err(&serial->dev->dev, > + "%s: get custom data failed!!\n", > + __func__); > + return 0; > + } > + > + dev_info(&serial->dev->dev, > + "%s: read configure from block:%d\n", __func__, > + (int) setting_idx); > + } else { > + dev_info(&serial->dev->dev, "%s: read configure default\n", > + __func__); > + } > + > + for (i = 0; i < F81534_NUM_PORT; ++i) { > + /* > + * For older configuration use. We'll transform it to newer > + * setting after load it with final port probed. > + */ > + switch (setting[i]) { > + case F81534_OLD_CONFIG_37: > + case F81534_OLD_CONFIG_38: > + case F81534_OLD_CONFIG_39: > + num_port += 1; > + break; > + } > + } > + > + if (num_port) { > + dev_dbg(&serial->dev->dev, "%s: old style with %d ports", > + __func__, num_port); > + return num_port; > + } > + > + /* new style, find all possible ports */ > + num_port = 0; > + for (i = 0; i < F81534_NUM_PORT; ++i) { > + if (setting[i] & F81534_PORT_UNAVAILABLE) > + continue; > + > + num_port += 1; ++ > + } > + > + if (num_port) > + return num_port; > + > + dev_err(&serial->dev->dev, "Read Failed!!, default 4 ports\n"); > + return 4; /* nothing found, oldest version IC */ > +} > + > +static void f81534_set_termios(struct tty_struct *tty, > + struct usb_serial_port *port, > + struct ktermios *old_termios) > +{ > + struct usb_device *dev = port->serial->dev; > + struct f81534_port_private *port_priv; > + u32 baud; > + u16 new_lcr = 0; > + int status; > + > + port_priv = usb_get_serial_port_data(port); > + > + 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) { > + /* Our device is not support for 1Mbps baudrate */ > + if ((baud == 1000000) || (baud > F81534_MAX_BAUDRATE)) { > + if (old_termios) > + baud = old_termios->c_ospeed; > + else > + baud = F81534_DEFAULT_BAUD_RATE; > + } > + > + dev_dbg(&dev->dev, "%s-baud: %d\n", __func__, baud); > + tty_encode_baud_rate(tty, baud, baud); > + > + port_priv->current_baud_rate = baud; > + } > + > + port_priv->shadow_lcr = new_lcr; > + status = f81534_set_port_config(dev, port_priv->phy, port, > + port_priv->current_baud_rate, new_lcr); > + if (status < 0) > + dev_err(&port->dev, "%s - f81534_set_port_config failed: %i\n", > + __func__, status); > + > + /* Re-Enable writer for to check H/W flow Control */ > + status = f81534_submit_writer(port, GFP_KERNEL); > + if (status) > + dev_err(&port->dev, "%s: submit failed\n", __func__); > +} > + > +static int f81534_prepare_gpio(struct usb_serial_port *port) > +{ > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + int max_name = 32; > + char *name = NULL; > + int idx = port->minor; > + int rc; > + > + name = devm_kzalloc(&port->dev, max_name, GFP_KERNEL); > + if (!name) > + return -ENOMEM; > + > + memcpy(&port_priv->f81534_gpio_chip, &f81534_gpio_chip_templete, > + sizeof(f81534_gpio_chip_templete)); > + > + snprintf(name, max_name - 1, "%s-%d", IC_NAME, idx); > + > + port_priv->f81534_gpio_chip.label = name; > + port_priv->f81534_gpio_chip.dev = &port->dev; > + > + rc = gpiochip_add(&port_priv->f81534_gpio_chip); > + if (rc) { > + dev_err(&port->dev, "%s: f81534_prepare_gpio failed:%d\n", > + __func__, rc); > + return rc; > + } > + > + return 0; > +} > + > +static int f81534_release_gpio(struct usb_serial_port *port) > +{ > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + > + gpiochip_remove(&port_priv->f81534_gpio_chip); > + 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 phy = port_priv->phy; > + > + if (tty) > + f81534_set_termios(tty, port, &tty->termios); > + > + atomic_inc(&serial_priv->port_active[phy]); > + return 0; > +} > + > +static void f81534_close(struct usb_serial_port *port) > +{ > + int i; > + unsigned long flags; > + 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 phy = port_priv->phy; > + > + atomic_dec(&serial_priv->port_active[phy]); > + > + /* referenced from usb_serial_generic_close() */ > + for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) > + usb_kill_urb(port->write_urbs[i]); > + > + spin_lock_irqsave(&port->lock, flags); > + kfifo_reset_out(&port->write_fifo); > + spin_unlock_irqrestore(&port->lock, flags); > +} > + > +static void f81534_disconnect(struct usb_serial *serial) > +{ > + int i; > + struct usb_serial_port *port0 = serial->port[0]; > + > + for (i = 0; i < ARRAY_SIZE(port0->read_urbs); ++i) > + usb_kill_urb(port0->read_urbs[i]); > +} > + > +static void f81534_release(struct usb_serial *serial) > +{ > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(serial); > + > + kfree(serial_priv); > +} > + > +static int f81534_get_serial_info(struct usb_serial_port *port, > + struct serial_struct __user *retinfo) > +{ > + struct serial_struct tmp; > + struct f81534_port_private *port_priv; > + > + port_priv = usb_get_serial_port_data(port); > + if (!port_priv) > + return -EFAULT; > + > + if (!retinfo) > + return -EFAULT; > + > + memset(&tmp, 0, sizeof(tmp)); > + > + tmp.type = PORT_16550A; > + tmp.port = port->port_number; > + tmp.line = port->minor; > + tmp.baud_base = port_priv->current_baud_base; > + > + if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) > + return -EFAULT; > + > + return 0; > +} > + > +static int f81534_set_mask_normal_register(struct usb_device *dev, u16 reg, > + u8 mask, u8 data) > +{ > + int status; > + u8 tmp; > + > + status = f81534_get_normal_register(dev, reg, &tmp); > + if (status) > + return status; > + > + tmp &= ~mask; > + tmp |= (mask & data); Can it be one line? tmp = (tmp & mask) | (mask & data); > + > + status = f81534_set_normal_register(dev, reg, tmp); > + if (status) > + return status; > + > + return 0; > +} > + > +static int f81534_switch_gpio_mode(struct usb_serial_port *port, u8 mode) > +{ > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + int x = port_priv->phy; > + int y; > + int val; > + int status; > + int idx = (mode > F81534_PIN_SET_MAX) ? F81534_PIN_SET_DEFAULT : mode; > + struct usb_device *dev = port->serial->dev; > + const struct io_map_value *request_mode = f81534_mode_control[idx]; > + /* our EVB m0 sometime will print as SD(Shutdown) */ > + const struct pin_data *pins[3] = {&request_mode->port[x].m1, > + &request_mode->port[x].m2, > + &request_mode->port[x].m0_sd}; > + > + if (mode > F81534_PIN_SET_MAX) > + return -EINVAL; > + > + for (y = 0; y < 3; ++y) { 3 -> ARRAY_SIZE ? > + val = pins[y]->port_io.reg_bit ? 0xff : 0x00; > + status = f81534_set_mask_normal_register(dev, > + pins[y]->port_io.reg_address, > + BIT(pins[y]->port_io.reg_offset), val); > + if (status) { > + dev_err(&port->dev, "%s: failed, index:%d\n", __func__, > + y); > + return status; > + } > + } > + > + return 0; > +} > + > +static int f81534_set_port_mode(struct usb_serial_port *port, > + enum uart_mode eMode) > +{ > + int status; > + u8 tmp; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + > + if (eMode > uart_mode_invalid) > + return -EINVAL; > + > + if (eMode != uart_mode_invalid) { > + status = f81534_getregister(port->serial->dev, port_priv->phy, > + CLK_SEL_REGISTER, &tmp); > + if (status) > + return status; > + > + tmp &= ~(F81534_RS485_MODE | F81534_RS485_INVERT); > + > + switch (port_priv->port_pin_data.force_uart_mode) { > + case uart_mode_rs232: > + case uart_mode_shutdown: > + case uart_mode_rs232_coexist: > + break; > + > + case uart_mode_rs485: > + tmp |= (F81534_RS485_MODE | F81534_RS485_INVERT); > + dev_dbg(&port->dev, "%s: uart_mode_rs485 URB:%x\n", > + __func__, tmp); > + break; > + > + default: > + tmp |= F81534_RS485_MODE; > + dev_dbg(&port->dev, "%s others URB:%x\n", > + __func__, tmp); > + break; > + > + } > + > + status = f81534_setregister(port->serial->dev, port_priv->phy, > + CLK_SEL_REGISTER, tmp); > + if (status) > + return status; > + } > + > + port_priv->port_pin_data.force_uart_mode = eMode; > + return 0; > +} > + > +static int f81534_ioctl_set_rs485(struct usb_serial_port *port, > + struct serial_rs485 __user *arg) > +{ > + > + struct serial_rs485 data; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(port->serial); > + struct usb_device *usb_dev = port->serial->dev; > + u16 device_port = port_priv->phy; > + int status; > + > + status = mutex_lock_interruptible(&serial_priv->change_mode_mutex); > + if (status) { > + dev_info(&port->dev, "%s: interrupted!\n", __func__); > + return status; > + } > + > + status = copy_from_user(&data, (struct serial_rs485 __user *)arg, > + sizeof(data)); > + if (status) { > + status = -EFAULT; > + goto finish; > + } > + > + if (data.flags & SER_RS485_ENABLED) { > + if (data.flags & SER_RS485_RTS_ON_SEND) { > + dev_dbg(&port->dev, "%s: uart_mode_rs485_1\n", > + __func__); > + port_priv->port_pin_data.force_uart_mode = > + uart_mode_rs485_1; > + } else { > + dev_dbg(&port->dev, "%s: uart_mode_rs485\n", __func__); > + port_priv->port_pin_data.force_uart_mode = > + uart_mode_rs485; > + } > + } else { > + dev_dbg(&port->dev, "%s: uart_mode_rs232\n", __func__); > + port_priv->port_pin_data.force_uart_mode = uart_mode_rs232; > + } > + > + status = f81534_set_port_config(usb_dev, device_port, port, > + port_priv->current_baud_rate, > + port_priv->shadow_lcr); > + if (status) { > + dev_err(&usb_dev->dev, "%s: set port error!!\n", __func__); > + goto finish; > + } > + > + status = f81534_save_configure_data(port); > + > +finish: > + mutex_unlock(&serial_priv->change_mode_mutex); > + f81534_wakeup_all_port(port->serial); > + > + return status; > +} > + > +static int f81534_ioctl_get_rs485(struct usb_serial_port *port, > + struct serial_rs485 __user *arg) > +{ > + int status; > + struct serial_rs485 data; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(port->serial); One line? > + > + status = mutex_lock_interruptible(&serial_priv->change_mode_mutex); > + if (status) { > + dev_info(&port->dev, "%s: interrupted!\n", __func__); > + return status; > + } > + > + memset(&data, 0, sizeof(data)); > + > + switch (port_priv->port_pin_data.force_uart_mode) { > + case uart_mode_rs485: > + dev_dbg(&port->dev, "%s: uart_mode_rs485\n", __func__); > + data.flags = SER_RS485_ENABLED; > + break; > + case uart_mode_rs485_1: > + dev_dbg(&port->dev, "%s: uart_mode_rs485_1\n", __func__); > + data.flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND; > + break; > + default: > + dev_dbg(&port->dev, "%s: uart_mode_rs232\n", __func__); > + break; > + } > + > + if (copy_to_user((struct serial_rs485 *)arg, &data, > + sizeof(struct serial_rs485))) > + status = -EFAULT; > + > + mutex_unlock(&serial_priv->change_mode_mutex); > + f81534_wakeup_all_port(port->serial); > + > + return status; > +} > + > +static int f81534_ioctl(struct tty_struct *tty, unsigned int cmd, > + unsigned long arg) > +{ > + struct usb_serial_port *port = tty->driver_data; > + > + switch (cmd) { > + case TIOCGRS485: > + return f81534_ioctl_get_rs485(port, > + (struct serial_rs485 __user *) > + arg); > + > + case TIOCSRS485: > + return f81534_ioctl_set_rs485(port, > + (struct serial_rs485 __user *) > + arg); > + > + case TIOCGSERIAL: > + return f81534_get_serial_info(port, > + (struct serial_struct __user *) > + arg); > + default: > + break; > + } > + > + return -ENOIOCTLCMD; > +} > + > +static int f81534_submit_writer(struct usb_serial_port *port, gfp_t mem_flags) > +{ > + struct usb_serial *serial = port->serial; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(serial); > + struct tty_struct *tty; > + struct urb *urb; > + bool cts_status = true; > + unsigned long flags; > + int updating_data, result; > + > + tty = tty_port_tty_get(&port->port); > + if (!tty) > + return 0; > + > + /* check H/W Flow status */ > + if (C_CRTSCTS(tty)) { > + spin_lock_irqsave(&port_priv->msr_lock, flags); > + cts_status = !!(port_priv->shadow_msr & UART_MSR_CTS); > + spin_unlock_irqrestore(&port_priv->msr_lock, flags); > + } > + > + tty_kref_put(tty); > + > + if (!cts_status) > + return 0; > + > + /* someone is changing setting, pause TX */ > + updating_data = mutex_is_locked(&serial_priv->change_mode_mutex); > + if (updating_data) > + return 0; > + > + /* 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 */ > + spin_lock_irqsave(&serial_priv->tx_empty_lock, flags); > + > + if (serial_priv->is_phy_port_not_empty[port_priv->phy]) { > + spin_unlock_irqrestore(&serial_priv->tx_empty_lock, flags); > + return 0; > + } > + > + serial_priv->is_phy_port_not_empty[port_priv->phy] = true; > + spin_unlock_irqrestore(&serial_priv->tx_empty_lock, flags); > + > + urb = port->write_urbs[0]; > + f81534_prepare_write_buffer(port, port->bulk_out_buffers[0], > + port->bulk_out_size); > + urb->transfer_buffer_length = F81534_WRITE_BUFFER_SIZE; > + > + result = usb_submit_urb(urb, mem_flags); > + if (result) { > + dev_err(&port->dev, "%s: submit error, result:%d\n", __func__, > + result); > + return result; > + } > + > + return 0; > +} > + > +static void f81534_process_per_serial_block(struct usb_serial_port *port, > + unsigned char *data) > +{ > + u8 lsr; > + char tty_flag; > + struct usb_serial *serial = port->serial; > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(serial); > + int status; > + int phy_port_num = data[0]; > + int read_size = 0; > + int i; > + unsigned long flags; > + bool available = !!atomic_read( > + &serial_priv->port_active[phy_port_num]); > + > + /* > + * 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 device read > + * index 4~127: serial in data block (data+lsr, must be even) > + */ > + switch (data[1]) { > + case F81534_TOKEN_TX_EMPTY: > + /* > + * We should record TX_EMPTY flag even the port is not opened > + */ > + spin_lock_irqsave(&serial_priv->tx_empty_lock, flags); > + serial_priv->is_phy_port_not_empty[phy_port_num] = false; > + spin_unlock_irqrestore(&serial_priv->tx_empty_lock, flags); > + usb_serial_port_softint(port); > + break; > + > + case F81534_TOKEN_MSR_CHANGE: > + /* > + * We'll save MSR value when device reported even when port > + * is not opened. If the port is not opened, the MSR will only > + * recorded without any future process. > + */ > + f81534_compare_msr(port, &data[3], available); > + break; > + > + case F81534_TOKEN_RECEIVE: > + read_size = data[2]; > + break; > + > + default: > + dev_warn(&port->dev, "%s: unknown token:%02x\n", __func__, > + data[1]); > + return; > + } > + > + /* if the port not had open, dont do future process */ > + if (!available) > + return; > + > + /* Wakeup writer workqueue only when port is opened */ > + if (data[1] == F81534_TOKEN_TX_EMPTY) { > + status = f81534_submit_writer(port, GFP_ATOMIC); > + if (status) > + dev_err(&port->dev, "%s: submit failed\n", __func__); > + } > + > + if (data[1] != F81534_TOKEN_RECEIVE) > + 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); > + } > + } > + > + if (port->port.console && 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) > +{ > + int i; > + int phy_port_num; > + int tty_port_num; > + unsigned char *ch; > + struct usb_serial *serial; > + struct usb_serial_port *port = NULL; > + > + if (!urb->actual_length) > + return; > + > + port = urb->context; > + serial = port->serial; > + ch = urb->transfer_buffer; > + > + for (i = 0; i < urb->actual_length; i += F81534_RECEIVE_BLOCK_SIZE) { > + phy_port_num = ch[i]; > + tty_port_num = f81534_phy_to_logic_port(serial, phy_port_num); > + port = serial->port[tty_port_num]; > + > + f81534_process_per_serial_block(port, &ch[i]); > + } > +} > + > +static void f81534_write_usb_callback(struct urb *urb) > +{ > + struct usb_serial_port *port = urb->context; > + int status = urb->status; > + > + if (status) { > + dev_warn(&port->dev, "%s - non-zero URB status: %d\n", > + __func__, status); > + } else { > + usb_serial_port_softint(port); > + } > +} > + > +static int f81534_setup_urbs(struct usb_serial *serial) > +{ > + int i = 0; > + u8 port0_out_address; > + int j; > + int buffer_size; > + struct usb_serial_port *port = NULL; > + > + /* > + * In our system architecture, we had 4 or 2 serial ports, > + * but only get 1 set of bulk in/out endpoints. > + * > + * The usb-serial subsystem will generate port 0 data, > + * but port 1/2/3 will not. It's will generate write URB and buffer > + * by following code > + */ > + for (i = 1; i < serial->num_ports; ++i) { > + port0_out_address = serial->port[0]->bulk_out_endpointAddress; > + buffer_size = serial->port[0]->bulk_out_size; > + port = serial->port[i]; > + > + if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL)) > + goto failed; > + > + port->bulk_out_size = buffer_size; > + port->bulk_out_endpointAddress = port0_out_address; > + > + for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) { > + set_bit(j, &port->write_urbs_free); > + > + port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL); > + if (!port->write_urbs[j]) > + goto failed; > + > + port->bulk_out_buffers[j] = kmalloc(buffer_size, > + GFP_KERNEL); > + if (!port->bulk_out_buffers[j]) > + goto failed; > + > + usb_fill_bulk_urb(port->write_urbs[j], serial->dev, > + usb_sndbulkpipe(serial->dev, > + port0_out_address), > + port->bulk_out_buffers[j], buffer_size, > + serial->type->write_bulk_callback, > + port); > + } > + > + port->write_urb = port->write_urbs[0]; > + port->bulk_out_buffer = port->bulk_out_buffers[0]; > + } > + > + return 0; > +failed: > + return -ENOMEM; > +} > + > +static int f81534_submit_read_urb(struct usb_serial *serial, gfp_t mem_flags) > +{ > + int status; > + > + status = usb_serial_generic_submit_read_urbs(serial->port[0], > + mem_flags); > + if (status) { > + dev_err(&serial->dev->dev, > + "%s: submit read URB failed!! status:%d!!\n", > + __func__, status); > + return status; > + } > + > + return 0; > +} > + > +/* > + * This function could be executed when > + * 1. Port configuration change. (e.g., UART/GPIO Mode changed) > + * 2. Old IC or configuration detected. > + * During the port probe(), We'll check the current port is final port. > + * If we found a old style configuration value, the > + * f81534_load_configure_data() will transform old to new default > + * setting to RAM, then f81534_save_configure_data() will compare the > + * flash & RAM setting, If not the same, write it with new data with > + * final port probe(). > + */ > +static int f81534_save_configure_data(struct usb_serial_port *port) > +{ > + int status; > + int count; > + int phy; > + int gpio_address, uart_address; > + int offset; > + bool reConfigure = false; > + u8 uart_mode, gpio_mode; > + u8 data[F81534_DEF_CONF_SIZE + 1]; > + u8 tmp[F81534_DEF_CONF_SIZE]; > + enum uart_mode current_mode; > + struct usb_serial *serial = port->serial; > + struct f81534_port_private *port_priv; > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(serial); > + > + /* compare memory with ic data */ > + for (count = 0; count < serial->num_ports; ++count) { > + port_priv = usb_get_serial_port_data(serial->port[count]); > + > + if (!port_priv) { > + dev_err(&port->dev, "%s: port_priv == NULL\n", > + __func__); > + continue; > + } > + > + phy = port_priv->phy; > + > + if (serial_priv->setting_idx == F81534_CUSTOM_NO_CUSTOM_DATA) { > + uart_address = F81534_DEF_CONF_ADDRESS_START + phy; > + gpio_address = F81534_DEF_CONF_ADDRESS_START + phy + > + F81534_CONF_SIZE; > + } else { > + /* > + * if had custom setting, override > + * 1st byte is a indicator, 0xff is empty, > + * 0xf0 is had data. Skip with 1st data > + */ > + > + uart_address = F81534_CUSTOM_ADDRESS_START + > + serial_priv->setting_idx * > + F81534_CUSTOM_DATA_SIZE + phy + > + F81534_CONF_OFFSET; > + > + gpio_address = F81534_CUSTOM_ADDRESS_START + > + serial_priv->setting_idx * > + F81534_CUSTOM_DATA_SIZE + phy + > + F81534_CONF_SIZE + F81534_CONF_OFFSET; > + } > + > + status = f81534_read_data(port->serial, uart_address, 1, > + &uart_mode); > + if (status) { > + dev_err(&port->dev, > + "%s: read uart data fail. status:%d\n", > + __func__, status); > + return status; > + } > + > + status = f81534_read_data(port->serial, gpio_address, 1, > + &gpio_mode); > + if (status) { > + dev_err(&port->dev, > + "%s: read gpio data fail. status:%d\n", > + __func__, status); > + return status; > + } > + > + if (port_priv->port_pin_data.gpio_mode != gpio_mode) > + reConfigure = true; > + > + /* check uart flag */ > + if (port_priv->port_pin_data.force_uart_mode == > + uart_mode_rs232) { > + if ((uart_mode & F81534_MODE_MASK) != > + F81534_RS232_FLAG) > + reConfigure = true; > + } else if (port_priv->port_pin_data.force_uart_mode == > + uart_mode_rs485_1) { > + if ((uart_mode & F81534_MODE_MASK) != > + F81534_RS485_1_FLAG) > + reConfigure = true; > + } else if (port_priv->port_pin_data.force_uart_mode == > + uart_mode_rs485) { > + if ((uart_mode & F81534_MODE_MASK) != > + F81534_RS485_FLAG) > + reConfigure = true; > + } else { > + reConfigure = true; > + } > + > + if (reConfigure) > + break; > + } > + > + if (serial_priv->setting_idx == F81534_CUSTOM_NO_CUSTOM_DATA) { > + dev_info(&serial->dev->dev, "%s: force to reconfigure\n", > + __func__); > + } else if (!reConfigure) { > + dev_dbg(&serial->dev->dev, "%s: update-to-date\n", __func__); > + return 0; > + } > + > + dev_info(&serial->dev->dev, "%s: updating\n", __func__); > + > + /* next setting block */ > + serial_priv->setting_idx = > + (serial_priv->setting_idx + 1) % F81534_CUSTOM_MAX_IDX; > + dev_info(&serial->dev->dev, "%s: saving to block index:%d\n", __func__, > + serial_priv->setting_idx); > + > + /* erase when start block is 0 */ > + if (!serial_priv->setting_idx) { > + dev_dbg(&serial->dev->dev, "%s: need erase\n", __func__); > + > + /* erase */ > + status = f81534_erase_sector(serial, > + F81534_CUSTOM_ADDRESS_START); > + if (status) { > + dev_err(&port->dev, > + "%s: erase sector failed! status:%d\n", > + __func__, status); > + return status; > + } > + } else { > + dev_dbg(&serial->dev->dev, > + "%s: dont need erase\n", __func__); > + } > + > + /* reprogram */ > + for (count = 0; count < serial->num_ports; ++count) { > + port_priv = usb_get_serial_port_data(serial->port[count]); > + phy = port_priv->phy; > + current_mode = port_priv->port_pin_data.force_uart_mode; > + gpio_mode = port_priv->port_pin_data.gpio_mode; > + > + serial_priv->default_conf_data[phy + F81534_CONF_SIZE] = > + gpio_mode; > + serial_priv->default_conf_data[phy] &= ~(F81534_MODE_MASK); > + > + /* check uart flag */ > + if (current_mode == uart_mode_rs232) { > + serial_priv->default_conf_data[phy] |= > + F81534_RS232_FLAG; > + } else if (current_mode == uart_mode_rs485_1) { > + serial_priv->default_conf_data[phy] |= > + F81534_RS485_1_FLAG; > + } else if (current_mode == uart_mode_rs485) { > + serial_priv->default_conf_data[phy] |= > + F81534_RS485_FLAG; > + } else { > + dev_err(&serial->dev->dev, > + "%s: current_mode error, value:%d\n", > + __func__, current_mode); > + } > + > + dev_info(&serial->dev->dev, > + "%s: port:%d uart_mode:%x, gpio_mode:%x\n", > + __func__, count, > + serial_priv->default_conf_data[phy + 0], > + gpio_mode); > + } > + > + /* > + * 1st byte is a indicator, 0xff is empty, 0xf0 is had data > + * only write 8 bytes of total 4 port uart & gpio mode > + * so we need write 1+8 data > + */ > + > + /* token of data exist */ > + data[0] = F81534_CUSTOM_VALID_TOKEN; > + memcpy(&data[1], serial_priv->default_conf_data, F81534_DEF_CONF_SIZE); > + > + offset = F81534_CUSTOM_ADDRESS_START + > + F81534_CUSTOM_DATA_SIZE * serial_priv->setting_idx; > + > + status = f81534_write_data(serial, offset, sizeof(data), data); > + if (status) { > + dev_err(&port->dev, > + "%s: f81534_write_data failed!! status:%d\n", > + __func__, status); > + return status; > + } > + > + /* recheck save & memory data */ > + memset(tmp, 0, sizeof(tmp)); > + > + status = f81534_read_data(serial, > + F81534_CUSTOM_ADDRESS_START + > + F81534_CUSTOM_DATA_SIZE * > + serial_priv->setting_idx + 1, sizeof(tmp), > + tmp); > + if (status) { > + dev_err(&port->dev, > + "%s: f81534_read_data failed!! status:%d\n", > + __func__, status); > + return status; > + } > + > + for (count = 0; count < F81534_DEF_CONF_SIZE; ++count) { > + if (tmp[count] == serial_priv->default_conf_data[count]) > + continue; > + > + dev_err(&port->dev, > + "%s:read data error, count:%d, data:%x %x\n", > + __func__, count, tmp[count], > + serial_priv->default_conf_data[count]); > + } > + > + dev_dbg(&serial->dev->dev, "%s: complete\n", __func__); > + > + return 0; > +} > + > +static int f81534_load_configure_data(struct usb_serial_port *port) > +{ > + int status; > + int offset; > + u8 uart_flag, gpio_mode; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(port->serial); > + int device_port = port_priv->phy; > + > + uart_flag = serial_priv->default_conf_data[device_port]; > + gpio_mode = serial_priv->default_conf_data[device_port + > + F81534_CONF_SIZE]; > + > + switch (uart_flag) { > + /* > + * For older configuration use. We'll transform it to newer setting > + * after load it with final port probed. > + */ > + case F81534_OLD_CONFIG_37: > + case F81534_OLD_CONFIG_38: > + case F81534_OLD_CONFIG_39: > + offset = device_port + F81534_CONF_SIZE; > + serial_priv->default_conf_data[device_port] = > + F81534_RS232_FLAG; > + gpio_mode = serial_priv->default_conf_data[offset] = > + F81534_PIN_SET_DEFAULT; > + port_priv->port_pin_data.force_uart_mode = uart_mode_rs232; > + port_priv->port_pin_data.gpio_mode = F81534_PIN_SET_DEFAULT; > + dev_info(&port->dev, "transceiver setting need upgrading\n"); > + break; > + > + /* MP style setting */ > + default: > + if (uart_flag & F81534_PORT_CONF_RS485) { > + if (uart_flag & F81534_PORT_CONF_RS485_INVERT) > + port_priv->port_pin_data.force_uart_mode = > + uart_mode_rs485; > + else > + port_priv->port_pin_data.force_uart_mode = > + uart_mode_rs485_1; > + } else { > + port_priv->port_pin_data.force_uart_mode = > + uart_mode_rs232; > + } > + > + break; > + } > + > + if ((gpio_mode >= F81534_PIN_SET_MIN) && > + (gpio_mode <= F81534_PIN_SET_MAX)) { > + port_priv->port_pin_data.gpio_mode = gpio_mode; > + dev_dbg(&port->dev, "gpio set to %d\n", gpio_mode); > + } else { > + port_priv->port_pin_data.gpio_mode = F81534_PIN_SET_DEFAULT; > + dev_info(&port->dev, "unknown gpio %d, setting to %d\n", > + gpio_mode, F81534_PIN_SET_DEFAULT); > + } > + > + status = > + f81534_switch_gpio_mode(port, port_priv->port_pin_data.gpio_mode); > + if (status) { > + dev_err(&port->dev, > + "%s: switch gpio mode failed!! status:%d\n", > + __func__, status); > + return status; > + } > + > + return 0; > +} > + > +static void dump_configure(struct usb_serial *serial) > +{ > + unsigned char transceiver, mode; > + int count; > + int index; > + int gpio_address, uart_address; > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(serial); > + > + index = serial_priv->setting_idx; > + > + for (count = 0; count < 4; ++count) { > + if (index == F81534_CUSTOM_NO_CUSTOM_DATA) { > + uart_address = F81534_DEF_CONF_ADDRESS_START + count; > + gpio_address = F81534_DEF_CONF_ADDRESS_START + count + > + F81534_CONF_SIZE; > + } else { > + > + /* > + * if had custom setting, override > + * 1st byte is a indicator. > + * 0xff is empty, 0xf0 is had data. > + * read and skip with 1st data. > + */ > + > + uart_address = F81534_CUSTOM_ADDRESS_START + > + F81534_CUSTOM_DATA_SIZE * index + > + count + F81534_CONF_OFFSET; > + > + gpio_address = F81534_CUSTOM_ADDRESS_START + > + F81534_CUSTOM_DATA_SIZE * index + > + count + F81534_CONF_SIZE + > + F81534_CONF_OFFSET; > + } > + > + f81534_read_data(serial, uart_address, 1, &transceiver); > + f81534_read_data(serial, gpio_address, 1, &mode); > + > + dev_info(&serial->dev->dev, > + "%s: port:%d uart_flag:%x gpio:%x\n", __func__, > + count, transceiver, mode); > + } > +} > + > +static int f81534_attach(struct usb_serial *serial) > +{ > + struct f81534_serial_private *serial_priv = NULL; > + int status; > + int i; > + int offset; > + uintptr_t setting_idx = (uintptr_t) usb_get_serial_data(serial); > + > + serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); > + if (!serial_priv) > + return -ENOMEM; > + > + usb_set_serial_data(serial, serial_priv); > + serial_priv->setting_idx = setting_idx; > + > + for (i = 0; i < F81534_NUM_PORT; ++i) { > + /* Disable all interrupt before submit URB */ > + status = f81534_setregister(serial->dev, i, > + INTERRUPT_ENABLE_REGISTER, 0x00); > + if (status) { > + dev_err(&serial->dev->dev, "%s: IER disable failed\n", > + __func__); > + goto failed; > + } > + } > + > + for (i = 0; i < F81534_NUM_PORT; ++i) > + atomic_set(&serial_priv->port_active[i], 0); > + > + spin_lock_init(&serial_priv->tx_empty_lock); > + mutex_init(&serial_priv->change_mode_mutex); > + > + status = f81534_setup_urbs(serial); > + if (status) > + goto failed; > + > + /* > + * The configuration layout: > + * byte 0/1/2/3: uart setting > + * byte 4/5/6/7: gpio setting > + * > + * We can reference from f81534_load_configure_data(). > + */ > + status = f81534_read_data(serial, F81534_DEF_CONF_ADDRESS_START, > + F81534_DEF_CONF_SIZE, > + serial_priv->default_conf_data); > + if (status) { > + dev_err(&serial->dev->dev, "%s read reserve data failed\n", > + __func__); > + goto failed; > + } > + > + /* > + * if had custom setting, override > + * 1st byte is a indicator, 0xff is empty, 0xf0 is had data > + * skip with 1st data > + * > + * if serial_priv->setting_idx == F81534_CUSTOM_NO_CUSTOM_DATA > + * it's mean for no configuration is custom section, so we'll use > + * default config read from F81534_DEF_CONF_ADDRESS_START > + */ > + if (serial_priv->setting_idx == F81534_CUSTOM_NO_CUSTOM_DATA) > + return 0; > + > + offset = F81534_CUSTOM_ADDRESS_START + > + F81534_CUSTOM_DATA_SIZE * serial_priv->setting_idx + 1; > + /* only read 8 bytes for mode & GPIO */ > + status = f81534_read_data(serial, offset, > + sizeof(serial_priv->default_conf_data), > + serial_priv->default_conf_data); > + if (status) { > + dev_err(&serial->dev->dev, > + "%s: get data failed, idx:%d, status:%d!!\n", > + __func__, serial_priv->setting_idx, status); > + goto failed; > + } > + > + /* > + * We'll register port 0 bulkin only once, It'll take all port received > + * data, MSR register change and TX_EMPTY information. > + */ > + status = f81534_submit_read_urb(serial, GFP_KERNEL); > + if (status) { > + dev_err(&serial->dev->dev, > + "%s: submit read URB failed!! status:%d!!\n", > + __func__, status); > + goto failed; > + } > + > + return 0; > +failed: > + kfree(serial_priv); > + return status; > +} > + > +static int f81534_init_msr(struct usb_serial_port *port) > +{ > + int status; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + struct usb_serial *serial = port->serial; > + unsigned long flags; > + int phy = port_priv->phy; > + u8 msr; > + > + /* Get MSR initial value*/ > + status = f81534_getregister(serial->dev, phy, MODEM_STATUS_REGISTER, > + &msr); > + if (status) > + return status; > + > + 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_port_probe(struct usb_serial_port *port) > +{ > + struct usb_serial *serial = port->serial; > + struct f81534_serial_private *serial_priv = > + usb_get_serial_data(serial); > + struct f81534_port_private *port_priv = NULL; > + int status, i, count = 0; > + int port_index = f81534_port_index(port); > + u8 ier = UART_IER_MSI | UART_IER_RLSI | UART_IER_THRI | UART_IER_RDI | > + IER_DMA_TX_EN | IER_DMA_RX_EN; > + > + port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); > + if (!port_priv) > + return -ENOMEM; > + > + atomic_set(&port_priv->gpio_active, 0); > + spin_lock_init(&port_priv->msr_lock); > + mutex_init(&port_priv->msr_mutex); > + > + /* assign logic-to-phy mapping */ > + port_priv->phy = F81534_UNUSED_PORT; > + > + for (i = 0; i < F81534_NUM_PORT; ++i) { > + if (serial_priv->default_conf_data[i] & > + F81534_PORT_UNAVAILABLE) > + continue; > + > + if (port_index == count) { > + port_priv->phy = i; > + break; > + } > + > + count += 1; ++ > + } > + > + if (port_priv->phy == F81534_UNUSED_PORT) { > + status = -ENODEV; > + goto port_fail; > + } > + > + usb_set_serial_port_data(port, port_priv); > + dev_dbg(&port->dev, "%s: mapping to phy: %d\n", __func__, > + port_priv->phy); > + > + /* > + * We'll read MSR reg only with port_porbe() for initial, then the MSR > + * will received from read URB with token F81534_TOKEN_MSR_CHANGE. > + * > + * This driver will save the MSR reported from device even port is not > + * opened. If the port is opened, we'll do normal process of MSR > + * changed. otherwise we'll just save the MSR. > + */ > + status = f81534_init_msr(port); > + if (status) > + goto port_fail; > + > + /* Enable all interrupt after submit URB */ > + status = f81534_setregister(serial->dev, port_priv->phy, > + INTERRUPT_ENABLE_REGISTER, ier); > + if (status) { > + dev_err(&serial->dev->dev, "%s: IER enable failed\n", > + __func__); > + goto port_fail; > + } > + > + status = f81534_prepare_gpio(port); > + if (status) > + goto port_fail; > + > + status = f81534_load_configure_data(port); > + if (status) > + goto port_fail; > + > + /* > + * Driver will compare memory & flash configure. If it not the same, > + * We'll save it when final port probed. > + */ > + if ((serial->num_ports - 1) == f81534_port_index(port)) { > + f81534_save_configure_data(port); > + dump_configure(serial); > + } > + > + status = f81534_set_port_mode(port, > + port_priv->port_pin_data.force_uart_mode); > + if (status < 0) { > + dev_err(&port->dev, "%s: initial setup failed phy: (%i)\n", > + __func__, port_priv->phy); > + goto port_fail; > + } > + > + return 0; > + > +port_fail: > + dev_err(&port->dev, "%s: failed, %d\n", __func__, status); > + kfree(port_priv); > + return status; > +} > + > +static int f81534_port_remove(struct usb_serial_port *port) > +{ > + struct f81534_port_private *port_priv; > + > + f81534_release_gpio(port); > + port_priv = usb_get_serial_port_data(port); > + kfree(port_priv); > + return 0; > +} > + > +static void f81534_compare_msr(struct usb_serial_port *port, u8 *msr, > + bool is_port_open) > +{ > + u8 old_msr; > + struct tty_struct *tty = NULL; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + unsigned long flags; > + int status; > + > + 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); > + > + if ((*msr & (UART_MSR_CTS | UART_MSR_DCTS)) == > + (UART_MSR_CTS | UART_MSR_DCTS)) { > + /* CTS changed, wakeup writer to re-check flow control */ > + if (is_port_open) { > + status = f81534_submit_writer(port, GFP_ATOMIC); > + if (status) { > + dev_err(&port->dev, "%s: submit failed\n", > + __func__); > + } > + } > + dev_dbg(&port->dev, "%s: CTS Flag changed, value: %x\n", > + __func__, !!(*msr & UART_MSR_CTS)); > + } > + > + dev_dbg(&port->dev, "%s: MSR from %02x to %02x\n", __func__, old_msr, > + *msr); > + > + if (!is_port_open) > + return; > + > + /* 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: port %d from %x to %x.\n", > + __func__, port_priv->phy, 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_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); > + unsigned long flags; > + int r; > + u8 msr, mcr; > + > + /* > + * We'll avoid to direct read MSR register. The IC will read the MSR > + * changed and report it f81534_process_per_serial_block() by > + * F81534_TOKEN_MSR_CHANGE. > + * > + * When this device in heavy loading (e.g., BurnInTest Loopback Test) > + * The report of MSR register will delay received a bit. It's due to > + * MSR interrupt is lowest priority in 16550A. So we decide to sleep > + * a little time to pass the test. > + */ > + if (schedule_timeout_interruptible( > + msecs_to_jiffies(F81534_DELAY_READ_MSR))) { > + dev_info(&port->dev, "%s: breaked !!\n", __func__); > + } > + > + mutex_lock(&port_priv->msr_mutex); > + spin_lock_irqsave(&port_priv->msr_lock, flags); > + > + msr = port_priv->shadow_msr; > + mcr = port_priv->shadow_mcr; > + > + spin_unlock_irqrestore(&port_priv->msr_lock, flags); > + mutex_unlock(&port_priv->msr_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_prepare_write_buffer(struct usb_serial_port *port, > + void *dest, size_t size) > +{ > + unsigned char *ptr = (unsigned char *) dest; > + struct f81534_port_private *port_priv = usb_get_serial_port_data(port); > + int port_num = port_priv->phy; > + struct usb_serial *serial = port->serial; > + > + WARN_ON(size != serial->port[0]->bulk_out_size); > + > + if (size != F81534_WRITE_BUFFER_SIZE) { > + WARN_ON(size != F81534_WRITE_BUFFER_SIZE); > + return 0; > + } > + > + /* > + * The block layout is fixed with 4x128 Bytes, per 128 Bytes > + * for a port. > + * index 0: port phy idx (e.g., 0,1,2,3) > + * index 1: only F81534_TOKEN_WRITE > + * index 2: serial out size > + * index 3: fix to 0 > + * index 4~127: serial out data block > + */ > + ptr[F81534_RECEIVE_BLOCK_SIZE * 0] = 0; > + ptr[F81534_RECEIVE_BLOCK_SIZE * 1] = 1; > + ptr[F81534_RECEIVE_BLOCK_SIZE * 2] = 2; > + ptr[F81534_RECEIVE_BLOCK_SIZE * 3] = 3; > + ptr[F81534_RECEIVE_BLOCK_SIZE * port_num + 0] = port_num; > + ptr[F81534_RECEIVE_BLOCK_SIZE * port_num + 1] = F81534_TOKEN_WRITE; > + ptr[F81534_RECEIVE_BLOCK_SIZE * port_num + 3] = 0; > + ptr[F81534_RECEIVE_BLOCK_SIZE * port_num + 2] = > + kfifo_out_locked(&port->write_fifo, > + &ptr[F81534_RECEIVE_BLOCK_SIZE * port_num + 4], > + F81534_MAX_TX_SIZE, &port->lock); > + > + return F81534_WRITE_BUFFER_SIZE; > +} > + > +static int f81534_write(struct tty_struct *tty, > + struct usb_serial_port *port, > + const unsigned char *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_KERNEL); > + if (status) { > + dev_err(&port->dev, "%s: submit failed\n", __func__); > + return status; > + } > + > + return bytes_out; > +} > + > +static int f81534_resume(struct usb_serial *serial) > +{ > + struct usb_serial_port *port; > + int status, error = 0; > + int i; > + > + status = f81534_submit_read_urb(serial, GFP_NOIO); > + if (status) { > + dev_err(&serial->dev->dev, > + "%s: submit read URB failed!! status:%d!!\n", > + __func__, status); > + return status; > + } > + > + for (i = 0; i < serial->num_ports; i++) { > + port = serial->port[i]; > + if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) > + continue; > + > + status = f81534_submit_writer(port, GFP_NOIO); > + if (status) { > + dev_err(&port->dev, "%s: submit failed\n", __func__); > + error += 1; > + } > + } > + > + return error ? -EIO : 0; > +} > + > +static struct usb_serial_driver f81534_device = { > + .driver = { > + .owner = THIS_MODULE, > + .name = IC_NAME, > + }, > + .description = DRIVER_DESC, > + .id_table = id_table, > + .open = f81534_open, > + .close = f81534_close, > + .write = f81534_write, > + .calc_num_ports = f81534_calc_num_ports, > + .attach = f81534_attach, > + .disconnect = f81534_disconnect, > + .release = f81534_release, > + .port_probe = f81534_port_probe, > + .port_remove = f81534_port_remove, > + .dtr_rts = f81534_dtr_rts, > + .process_read_urb = f81534_process_read_urb, > + .ioctl = f81534_ioctl, > + .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, id_table); > + > +MODULE_DESCRIPTION(DRIVER_DESC); > +MODULE_AUTHOR("Peter Hong <Peter_Hong@xxxxxxxxxxxxx>"); > +MODULE_AUTHOR("Tom Tsai <Tom_Tsai@xxxxxxxxxxxxx>"); > +MODULE_LICENSE("GPL"); > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- With Best Regards, Andy Shevchenko -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
