usb:serial: Add Fintek F81532/534 driver

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.

+++ b/drivers/usb/serial/f81534.c

drivers/usb/serial/f81534.c new file +85 -0

@@ -0,0 +1,2991 @@
+/*
+ * F81532/F81534 USB to Serial Ports Bridge
+ *
+ * F81532 => 2 Serial Ports
+ * F81534 => 4 Serial Ports
+ *
+ * Copyright (C) 2014 Tom Tsai ([email protected])
+ *
+ * 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

drivers/usb/serial/f81534.c new file +32 -0

+ */
+
+#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)

drivers/usb/serial/f81534.c new file +416 -0

+#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);

drivers/usb/serial/f81534.c new file +15 -0

+
+/*
+ * 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)
+{

drivers/usb/serial/f81534.c new file +65 -0

+       }
+
+       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,

drivers/usb/serial/f81534.c new file +11 -0

+                       buf[offset] = tmp_buf[count];
+               }
+
+               size -= read_size;
+               block += 1;
+       } while (size);
+
+       return 0;
+}
+
+/*

drivers/usb/serial/f81534.c new file +27 -0

+       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)

drivers/usb/serial/f81534.c new file +80 -0

+       } 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, &current_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;

drivers/usb/serial/f81534.c new file +54 -0

+
+       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);
+}
+

drivers/usb/serial/f81534.c new file +21 -0

+       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);
+}
+

drivers/usb/serial/f81534.c new file +102 -0

+                       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

drivers/usb/serial/f81534.c new file +34 -0

+               } 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;
+}
+

drivers/usb/serial/f81534.c new file +15 -0

+}
+
+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;

drivers/usb/serial/f81534.c new file +15 -0

+       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,

drivers/usb/serial/f81534.c new file +83 -0

+
+               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;
+}

drivers/usb/serial/f81534.c new file +179 -0

+       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);

drivers/usb/serial/f81534.c new file +202 -0

+       }
+
+       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)

drivers/usb/serial/f81534.c new file +17 -0

+
+       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;

drivers/usb/serial/f81534.c new file +118 -0

+               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;

drivers/usb/serial/f81534.c new file +826 -0

+
+       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) {

drivers/usb/serial/f81534.c new file +321 -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 <[email protected]>");
+MODULE_AUTHOR("Tom Tsai <[email protected]>");
+MODULE_LICENSE("GPL");
--

1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html