![Johan Hovold](/assets/img/avatar_default.png)
Setup each port to use the first bulk-out endpoint in calc_num_ports so that core allocates the corresponding port resources for us. Signed-off-by: Johan Hovold <johan@kernel.org>
1341 lines
32 KiB
C
1341 lines
32 KiB
C
/*
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* F81532/F81534 USB to Serial Ports Bridge
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*
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* F81532 => 2 Serial Ports
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* F81534 => 4 Serial Ports
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Copyright (C) 2016 Feature Integration Technology Inc., (Fintek)
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* Copyright (C) 2016 Tom Tsai (Tom_Tsai@fintek.com.tw)
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* Copyright (C) 2016 Peter Hong (Peter_Hong@fintek.com.tw)
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*
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* The F81532/F81534 had 1 control endpoint for setting, 1 endpoint bulk-out
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* for all serial port TX and 1 endpoint bulk-in for all serial port read in
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* (Read Data/MSR/LSR).
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*
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* Write URB is fixed with 512bytes, per serial port used 128Bytes.
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* It can be described by f81534_prepare_write_buffer()
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*
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* Read URB is 512Bytes max, per serial port used 128Bytes.
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* It can be described by f81534_process_read_urb() and maybe received with
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* 128x1,2,3,4 bytes.
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*
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*/
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include <linux/serial_reg.h>
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#include <linux/module.h>
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#include <linux/uaccess.h>
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/* Serial Port register Address */
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#define F81534_UART_BASE_ADDRESS 0x1200
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#define F81534_UART_OFFSET 0x10
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#define F81534_DIVISOR_LSB_REG (0x00 + F81534_UART_BASE_ADDRESS)
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#define F81534_DIVISOR_MSB_REG (0x01 + F81534_UART_BASE_ADDRESS)
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#define F81534_FIFO_CONTROL_REG (0x02 + F81534_UART_BASE_ADDRESS)
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#define F81534_LINE_CONTROL_REG (0x03 + F81534_UART_BASE_ADDRESS)
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#define F81534_MODEM_CONTROL_REG (0x04 + F81534_UART_BASE_ADDRESS)
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#define F81534_MODEM_STATUS_REG (0x06 + F81534_UART_BASE_ADDRESS)
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#define F81534_CONFIG1_REG (0x09 + F81534_UART_BASE_ADDRESS)
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#define F81534_DEF_CONF_ADDRESS_START 0x3000
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#define F81534_DEF_CONF_SIZE 8
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#define F81534_CUSTOM_ADDRESS_START 0x2f00
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#define F81534_CUSTOM_DATA_SIZE 0x10
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#define F81534_CUSTOM_NO_CUSTOM_DATA 0xff
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#define F81534_CUSTOM_VALID_TOKEN 0xf0
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#define F81534_CONF_OFFSET 1
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#define F81534_MAX_DATA_BLOCK 64
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#define F81534_MAX_BUS_RETRY 20
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/* Default URB timeout for USB operations */
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#define F81534_USB_MAX_RETRY 10
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#define F81534_USB_TIMEOUT 1000
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#define F81534_SET_GET_REGISTER 0xA0
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#define F81534_NUM_PORT 4
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#define F81534_UNUSED_PORT 0xff
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#define F81534_WRITE_BUFFER_SIZE 512
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#define DRIVER_DESC "Fintek F81532/F81534"
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#define FINTEK_VENDOR_ID_1 0x1934
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#define FINTEK_VENDOR_ID_2 0x2C42
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#define FINTEK_DEVICE_ID 0x1202
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#define F81534_MAX_TX_SIZE 124
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#define F81534_MAX_RX_SIZE 124
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#define F81534_RECEIVE_BLOCK_SIZE 128
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#define F81534_MAX_RECEIVE_BLOCK_SIZE 512
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#define F81534_TOKEN_RECEIVE 0x01
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#define F81534_TOKEN_WRITE 0x02
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#define F81534_TOKEN_TX_EMPTY 0x03
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#define F81534_TOKEN_MSR_CHANGE 0x04
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/*
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* We used interal SPI bus to access FLASH section. We must wait the SPI bus to
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* idle if we performed any command.
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*
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* SPI Bus status register: F81534_BUS_REG_STATUS
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* Bit 0/1 : BUSY
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* Bit 2 : IDLE
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*/
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#define F81534_BUS_BUSY (BIT(0) | BIT(1))
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#define F81534_BUS_IDLE BIT(2)
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#define F81534_BUS_READ_DATA 0x1004
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#define F81534_BUS_REG_STATUS 0x1003
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#define F81534_BUS_REG_START 0x1002
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#define F81534_BUS_REG_END 0x1001
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#define F81534_CMD_READ 0x03
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#define F81534_DEFAULT_BAUD_RATE 9600
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#define F81534_MAX_BAUDRATE 115200
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#define F81534_PORT_CONF_DISABLE_PORT BIT(3)
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#define F81534_PORT_CONF_NOT_EXIST_PORT BIT(7)
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#define F81534_PORT_UNAVAILABLE \
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(F81534_PORT_CONF_DISABLE_PORT | F81534_PORT_CONF_NOT_EXIST_PORT)
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#define F81534_1X_RXTRIGGER 0xc3
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#define F81534_8X_RXTRIGGER 0xcf
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static const struct usb_device_id f81534_id_table[] = {
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{ USB_DEVICE(FINTEK_VENDOR_ID_1, FINTEK_DEVICE_ID) },
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{ USB_DEVICE(FINTEK_VENDOR_ID_2, FINTEK_DEVICE_ID) },
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{} /* Terminating entry */
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};
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#define F81534_TX_EMPTY_BIT 0
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struct f81534_serial_private {
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u8 conf_data[F81534_DEF_CONF_SIZE];
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int tty_idx[F81534_NUM_PORT];
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u8 setting_idx;
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int opened_port;
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struct mutex urb_mutex;
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};
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struct f81534_port_private {
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struct mutex mcr_mutex;
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unsigned long tx_empty;
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spinlock_t msr_lock;
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u8 shadow_mcr;
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u8 shadow_msr;
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u8 phy_num;
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};
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static int f81534_logic_to_phy_port(struct usb_serial *serial,
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struct usb_serial_port *port)
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{
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struct f81534_serial_private *serial_priv =
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usb_get_serial_data(port->serial);
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int count = 0;
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int i;
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for (i = 0; i < F81534_NUM_PORT; ++i) {
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if (serial_priv->conf_data[i] & F81534_PORT_UNAVAILABLE)
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continue;
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if (port->port_number == count)
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return i;
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++count;
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}
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return -ENODEV;
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}
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static int f81534_set_register(struct usb_serial *serial, u16 reg, u8 data)
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{
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struct usb_interface *interface = serial->interface;
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struct usb_device *dev = serial->dev;
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size_t count = F81534_USB_MAX_RETRY;
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int status;
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u8 *tmp;
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tmp = kmalloc(sizeof(u8), GFP_KERNEL);
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if (!tmp)
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return -ENOMEM;
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*tmp = data;
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/*
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* Our device maybe not reply when heavily loading, We'll retry for
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* F81534_USB_MAX_RETRY times.
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*/
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while (count--) {
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status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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F81534_SET_GET_REGISTER,
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USB_TYPE_VENDOR | USB_DIR_OUT,
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reg, 0, tmp, sizeof(u8),
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F81534_USB_TIMEOUT);
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if (status > 0) {
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status = 0;
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break;
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} else if (status == 0) {
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status = -EIO;
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}
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}
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if (status < 0) {
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dev_err(&interface->dev, "%s: reg: %x data: %x failed: %d\n",
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__func__, reg, data, status);
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}
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kfree(tmp);
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return status;
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}
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static int f81534_get_register(struct usb_serial *serial, u16 reg, u8 *data)
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{
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struct usb_interface *interface = serial->interface;
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struct usb_device *dev = serial->dev;
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size_t count = F81534_USB_MAX_RETRY;
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int status;
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u8 *tmp;
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tmp = kmalloc(sizeof(u8), GFP_KERNEL);
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if (!tmp)
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return -ENOMEM;
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/*
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* Our device maybe not reply when heavily loading, We'll retry for
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* F81534_USB_MAX_RETRY times.
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*/
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while (count--) {
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status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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F81534_SET_GET_REGISTER,
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USB_TYPE_VENDOR | USB_DIR_IN,
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reg, 0, tmp, sizeof(u8),
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F81534_USB_TIMEOUT);
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if (status > 0) {
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status = 0;
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break;
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} else if (status == 0) {
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status = -EIO;
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}
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}
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if (status < 0) {
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dev_err(&interface->dev, "%s: reg: %x failed: %d\n", __func__,
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reg, status);
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goto end;
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}
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*data = *tmp;
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end:
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kfree(tmp);
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return status;
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}
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static int f81534_set_port_register(struct usb_serial_port *port, u16 reg,
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u8 data)
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{
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struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
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return f81534_set_register(port->serial,
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reg + port_priv->phy_num * F81534_UART_OFFSET, data);
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}
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static int f81534_get_port_register(struct usb_serial_port *port, u16 reg,
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u8 *data)
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{
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struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
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return f81534_get_register(port->serial,
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reg + port_priv->phy_num * F81534_UART_OFFSET, data);
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}
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/*
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* If we try to access the internal flash via SPI bus, we should check the bus
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* status for every command. e.g., F81534_BUS_REG_START/F81534_BUS_REG_END
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*/
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static int f81534_wait_for_spi_idle(struct usb_serial *serial)
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{
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size_t count = F81534_MAX_BUS_RETRY;
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u8 tmp;
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int status;
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do {
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status = f81534_get_register(serial, F81534_BUS_REG_STATUS,
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&tmp);
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if (status)
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return status;
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if (tmp & F81534_BUS_BUSY)
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continue;
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if (tmp & F81534_BUS_IDLE)
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break;
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} while (--count);
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if (!count) {
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dev_err(&serial->interface->dev,
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"%s: timed out waiting for idle SPI bus\n",
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__func__);
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return -EIO;
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}
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return f81534_set_register(serial, F81534_BUS_REG_STATUS,
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tmp & ~F81534_BUS_IDLE);
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}
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static int f81534_get_spi_register(struct usb_serial *serial, u16 reg,
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u8 *data)
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{
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int status;
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status = f81534_get_register(serial, reg, data);
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if (status)
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return status;
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return f81534_wait_for_spi_idle(serial);
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}
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static int f81534_set_spi_register(struct usb_serial *serial, u16 reg, u8 data)
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{
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int status;
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status = f81534_set_register(serial, reg, data);
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if (status)
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return status;
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return f81534_wait_for_spi_idle(serial);
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}
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static int f81534_read_flash(struct usb_serial *serial, u32 address,
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size_t size, u8 *buf)
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{
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u8 tmp_buf[F81534_MAX_DATA_BLOCK];
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size_t block = 0;
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size_t read_size;
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size_t count;
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int status;
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int offset;
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u16 reg_tmp;
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status = f81534_set_spi_register(serial, F81534_BUS_REG_START,
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F81534_CMD_READ);
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if (status)
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return status;
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status = f81534_set_spi_register(serial, F81534_BUS_REG_START,
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(address >> 16) & 0xff);
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if (status)
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return status;
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status = f81534_set_spi_register(serial, F81534_BUS_REG_START,
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(address >> 8) & 0xff);
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if (status)
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return status;
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status = f81534_set_spi_register(serial, F81534_BUS_REG_START,
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(address >> 0) & 0xff);
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if (status)
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return status;
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/* Continuous read mode */
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do {
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read_size = min_t(size_t, F81534_MAX_DATA_BLOCK, size);
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for (count = 0; count < read_size; ++count) {
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/* To write F81534_BUS_REG_END when final byte */
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if (size <= F81534_MAX_DATA_BLOCK &&
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read_size == count + 1)
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reg_tmp = F81534_BUS_REG_END;
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else
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reg_tmp = F81534_BUS_REG_START;
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/*
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* Dummy code, force IC to generate a read pulse, the
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* set of value 0xf1 is dont care (any value is ok)
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*/
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status = f81534_set_spi_register(serial, reg_tmp,
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0xf1);
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if (status)
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return status;
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status = f81534_get_spi_register(serial,
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F81534_BUS_READ_DATA,
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&tmp_buf[count]);
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if (status)
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return status;
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offset = count + block * F81534_MAX_DATA_BLOCK;
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buf[offset] = tmp_buf[count];
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}
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size -= read_size;
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++block;
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} while (size);
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return 0;
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}
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static void f81534_prepare_write_buffer(struct usb_serial_port *port, u8 *buf)
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{
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struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
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int phy_num = port_priv->phy_num;
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u8 tx_len;
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int i;
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/*
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* The block layout is fixed with 4x128 Bytes, per 128 Bytes a port.
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* index 0: port phy idx (e.g., 0,1,2,3)
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* index 1: only F81534_TOKEN_WRITE
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* index 2: serial TX out length
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* index 3: fix to 0
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* index 4~127: serial out data block
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*/
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for (i = 0; i < F81534_NUM_PORT; ++i) {
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buf[i * F81534_RECEIVE_BLOCK_SIZE] = i;
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buf[i * F81534_RECEIVE_BLOCK_SIZE + 1] = F81534_TOKEN_WRITE;
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buf[i * F81534_RECEIVE_BLOCK_SIZE + 2] = 0;
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buf[i * F81534_RECEIVE_BLOCK_SIZE + 3] = 0;
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}
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tx_len = kfifo_out_locked(&port->write_fifo,
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&buf[phy_num * F81534_RECEIVE_BLOCK_SIZE + 4],
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F81534_MAX_TX_SIZE, &port->lock);
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buf[phy_num * F81534_RECEIVE_BLOCK_SIZE + 2] = tx_len;
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}
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static int f81534_submit_writer(struct usb_serial_port *port, gfp_t mem_flags)
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{
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struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
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struct urb *urb;
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unsigned long flags;
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int result;
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/* Check is any data in write_fifo */
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spin_lock_irqsave(&port->lock, flags);
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if (kfifo_is_empty(&port->write_fifo)) {
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spin_unlock_irqrestore(&port->lock, flags);
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return 0;
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}
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spin_unlock_irqrestore(&port->lock, flags);
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/* Check H/W is TXEMPTY */
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if (!test_and_clear_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty))
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return 0;
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urb = port->write_urbs[0];
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f81534_prepare_write_buffer(port, port->bulk_out_buffers[0]);
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urb->transfer_buffer_length = F81534_WRITE_BUFFER_SIZE;
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result = usb_submit_urb(urb, mem_flags);
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if (result) {
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set_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty);
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dev_err(&port->dev, "%s: submit failed: %d\n", __func__,
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result);
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return result;
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}
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usb_serial_port_softint(port);
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return 0;
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}
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static u32 f81534_calc_baud_divisor(u32 baudrate, u32 clockrate)
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{
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if (!baudrate)
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return 0;
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|
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/* Round to nearest divisor */
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return DIV_ROUND_CLOSEST(clockrate, baudrate);
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}
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|
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static int f81534_set_port_config(struct usb_serial_port *port, u32 baudrate,
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u8 lcr)
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{
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u32 divisor;
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int status;
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u8 value;
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if (baudrate <= 1200)
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value = F81534_1X_RXTRIGGER; /* 128 FIFO & TL: 1x */
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else
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value = F81534_8X_RXTRIGGER; /* 128 FIFO & TL: 8x */
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status = f81534_set_port_register(port, F81534_CONFIG1_REG, value);
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if (status) {
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dev_err(&port->dev, "%s: CONFIG1 setting failed\n", __func__);
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return status;
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}
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|
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if (baudrate <= 1200)
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value = UART_FCR_TRIGGER_1 | UART_FCR_ENABLE_FIFO; /* TL: 1 */
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else
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value = UART_FCR_R_TRIG_11 | UART_FCR_ENABLE_FIFO; /* TL: 14 */
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status = f81534_set_port_register(port, F81534_FIFO_CONTROL_REG,
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|
value);
|
|
if (status) {
|
|
dev_err(&port->dev, "%s: FCR setting failed\n", __func__);
|
|
return status;
|
|
}
|
|
|
|
divisor = f81534_calc_baud_divisor(baudrate, F81534_MAX_BAUDRATE);
|
|
value = UART_LCR_DLAB;
|
|
status = f81534_set_port_register(port, F81534_LINE_CONTROL_REG,
|
|
value);
|
|
if (status) {
|
|
dev_err(&port->dev, "%s: set LCR failed\n", __func__);
|
|
return status;
|
|
}
|
|
|
|
value = divisor & 0xff;
|
|
status = f81534_set_port_register(port, F81534_DIVISOR_LSB_REG, value);
|
|
if (status) {
|
|
dev_err(&port->dev, "%s: set DLAB LSB failed\n", __func__);
|
|
return status;
|
|
}
|
|
|
|
value = (divisor >> 8) & 0xff;
|
|
status = f81534_set_port_register(port, F81534_DIVISOR_MSB_REG, value);
|
|
if (status) {
|
|
dev_err(&port->dev, "%s: set DLAB MSB failed\n", __func__);
|
|
return status;
|
|
}
|
|
|
|
status = f81534_set_port_register(port, F81534_LINE_CONTROL_REG, lcr);
|
|
if (status) {
|
|
dev_err(&port->dev, "%s: set LCR failed\n", __func__);
|
|
return status;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int f81534_update_mctrl(struct usb_serial_port *port, unsigned int set,
|
|
unsigned int clear)
|
|
{
|
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
|
|
int status;
|
|
u8 tmp;
|
|
|
|
if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0)
|
|
return 0; /* no change */
|
|
|
|
mutex_lock(&port_priv->mcr_mutex);
|
|
|
|
/* 'Set' takes precedence over 'Clear' */
|
|
clear &= ~set;
|
|
|
|
/* Always enable UART_MCR_OUT2 */
|
|
tmp = UART_MCR_OUT2 | port_priv->shadow_mcr;
|
|
|
|
if (clear & TIOCM_DTR)
|
|
tmp &= ~UART_MCR_DTR;
|
|
|
|
if (clear & TIOCM_RTS)
|
|
tmp &= ~UART_MCR_RTS;
|
|
|
|
if (set & TIOCM_DTR)
|
|
tmp |= UART_MCR_DTR;
|
|
|
|
if (set & TIOCM_RTS)
|
|
tmp |= UART_MCR_RTS;
|
|
|
|
status = f81534_set_port_register(port, F81534_MODEM_CONTROL_REG, tmp);
|
|
if (status < 0) {
|
|
dev_err(&port->dev, "%s: MCR write failed\n", __func__);
|
|
mutex_unlock(&port_priv->mcr_mutex);
|
|
return status;
|
|
}
|
|
|
|
port_priv->shadow_mcr = tmp;
|
|
mutex_unlock(&port_priv->mcr_mutex);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function will search the data area with token F81534_CUSTOM_VALID_TOKEN
|
|
* for latest configuration index. If nothing found
|
|
* (*index = F81534_CUSTOM_NO_CUSTOM_DATA), We'll load default configure in
|
|
* F81534_DEF_CONF_ADDRESS_START section.
|
|
*
|
|
* Due to we only use block0 to save data, so *index should be 0 or
|
|
* F81534_CUSTOM_NO_CUSTOM_DATA.
|
|
*/
|
|
static int f81534_find_config_idx(struct usb_serial *serial, u8 *index)
|
|
{
|
|
u8 tmp;
|
|
int status;
|
|
|
|
status = f81534_read_flash(serial, F81534_CUSTOM_ADDRESS_START, 1,
|
|
&tmp);
|
|
if (status) {
|
|
dev_err(&serial->interface->dev, "%s: read failed: %d\n",
|
|
__func__, status);
|
|
return status;
|
|
}
|
|
|
|
/* We'll use the custom data when the data is valid. */
|
|
if (tmp == F81534_CUSTOM_VALID_TOKEN)
|
|
*index = 0;
|
|
else
|
|
*index = F81534_CUSTOM_NO_CUSTOM_DATA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We had 2 generation of F81532/534 IC. All has an internal storage.
|
|
*
|
|
* 1st is pure USB-to-TTL RS232 IC and designed for 4 ports only, no any
|
|
* internal data will used. All mode and gpio control should manually set
|
|
* by AP or Driver and all storage space value are 0xff. The
|
|
* f81534_calc_num_ports() will run to final we marked as "oldest version"
|
|
* for this IC.
|
|
*
|
|
* 2rd is designed to more generic to use any transceiver and this is our
|
|
* mass production type. We'll save data in F81534_CUSTOM_ADDRESS_START
|
|
* (0x2f00) with 9bytes. The 1st byte is a indicater. If the token is
|
|
* F81534_CUSTOM_VALID_TOKEN(0xf0), the IC is 2nd gen type, the following
|
|
* 4bytes save port mode (0:RS232/1:RS485 Invert/2:RS485), and the last
|
|
* 4bytes save GPIO state(value from 0~7 to represent 3 GPIO output pin).
|
|
* The f81534_calc_num_ports() will run to "new style" with checking
|
|
* F81534_PORT_UNAVAILABLE section.
|
|
*/
|
|
static int f81534_calc_num_ports(struct usb_serial *serial,
|
|
struct usb_serial_endpoints *epds)
|
|
{
|
|
struct device *dev = &serial->interface->dev;
|
|
int size_bulk_in = usb_endpoint_maxp(epds->bulk_in[0]);
|
|
int size_bulk_out = usb_endpoint_maxp(epds->bulk_out[0]);
|
|
u8 setting[F81534_CUSTOM_DATA_SIZE];
|
|
u8 setting_idx;
|
|
u8 num_port = 0;
|
|
int status;
|
|
size_t i;
|
|
|
|
if (size_bulk_out != F81534_WRITE_BUFFER_SIZE ||
|
|
size_bulk_in != F81534_MAX_RECEIVE_BLOCK_SIZE) {
|
|
dev_err(dev, "unsupported endpoint max packet size\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Check had custom setting */
|
|
status = f81534_find_config_idx(serial, &setting_idx);
|
|
if (status) {
|
|
dev_err(&serial->interface->dev, "%s: find idx failed: %d\n",
|
|
__func__, status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* We'll read custom data only when data available, otherwise we'll
|
|
* read default value instead.
|
|
*/
|
|
if (setting_idx != F81534_CUSTOM_NO_CUSTOM_DATA) {
|
|
status = f81534_read_flash(serial,
|
|
F81534_CUSTOM_ADDRESS_START +
|
|
F81534_CONF_OFFSET,
|
|
sizeof(setting), setting);
|
|
if (status) {
|
|
dev_err(&serial->interface->dev,
|
|
"%s: get custom data failed: %d\n",
|
|
__func__, status);
|
|
return status;
|
|
}
|
|
|
|
dev_dbg(&serial->interface->dev,
|
|
"%s: read config from block: %d\n", __func__,
|
|
setting_idx);
|
|
} else {
|
|
/* Read default board setting */
|
|
status = f81534_read_flash(serial,
|
|
F81534_DEF_CONF_ADDRESS_START, F81534_NUM_PORT,
|
|
setting);
|
|
|
|
if (status) {
|
|
dev_err(&serial->interface->dev,
|
|
"%s: read failed: %d\n", __func__,
|
|
status);
|
|
return status;
|
|
}
|
|
|
|
dev_dbg(&serial->interface->dev, "%s: read default config\n",
|
|
__func__);
|
|
}
|
|
|
|
/* New style, find all possible ports */
|
|
for (i = 0; i < F81534_NUM_PORT; ++i) {
|
|
if (setting[i] & F81534_PORT_UNAVAILABLE)
|
|
continue;
|
|
|
|
++num_port;
|
|
}
|
|
|
|
if (!num_port) {
|
|
dev_warn(&serial->interface->dev,
|
|
"no config found, assuming 4 ports\n");
|
|
num_port = 4; /* Nothing found, oldest version IC */
|
|
}
|
|
|
|
/*
|
|
* Setup bulk-out endpoint multiplexing. All ports share the same
|
|
* bulk-out endpoint.
|
|
*/
|
|
BUILD_BUG_ON(ARRAY_SIZE(epds->bulk_out) < F81534_NUM_PORT);
|
|
|
|
for (i = 1; i < num_port; ++i)
|
|
epds->bulk_out[i] = epds->bulk_out[0];
|
|
|
|
epds->num_bulk_out = num_port;
|
|
|
|
return num_port;
|
|
}
|
|
|
|
static void f81534_set_termios(struct tty_struct *tty,
|
|
struct usb_serial_port *port,
|
|
struct ktermios *old_termios)
|
|
{
|
|
u8 new_lcr = 0;
|
|
int status;
|
|
u32 baud;
|
|
|
|
if (C_BAUD(tty) == B0)
|
|
f81534_update_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
|
|
else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
|
|
f81534_update_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
|
|
|
|
if (C_PARENB(tty)) {
|
|
new_lcr |= UART_LCR_PARITY;
|
|
|
|
if (!C_PARODD(tty))
|
|
new_lcr |= UART_LCR_EPAR;
|
|
|
|
if (C_CMSPAR(tty))
|
|
new_lcr |= UART_LCR_SPAR;
|
|
}
|
|
|
|
if (C_CSTOPB(tty))
|
|
new_lcr |= UART_LCR_STOP;
|
|
|
|
switch (C_CSIZE(tty)) {
|
|
case CS5:
|
|
new_lcr |= UART_LCR_WLEN5;
|
|
break;
|
|
case CS6:
|
|
new_lcr |= UART_LCR_WLEN6;
|
|
break;
|
|
case CS7:
|
|
new_lcr |= UART_LCR_WLEN7;
|
|
break;
|
|
default:
|
|
case CS8:
|
|
new_lcr |= UART_LCR_WLEN8;
|
|
break;
|
|
}
|
|
|
|
baud = tty_get_baud_rate(tty);
|
|
if (!baud)
|
|
return;
|
|
|
|
if (baud > F81534_MAX_BAUDRATE) {
|
|
if (old_termios)
|
|
baud = tty_termios_baud_rate(old_termios);
|
|
else
|
|
baud = F81534_DEFAULT_BAUD_RATE;
|
|
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
}
|
|
|
|
dev_dbg(&port->dev, "%s: baud: %d\n", __func__, baud);
|
|
|
|
status = f81534_set_port_config(port, baud, new_lcr);
|
|
if (status < 0) {
|
|
dev_err(&port->dev, "%s: set port config failed: %d\n",
|
|
__func__, status);
|
|
}
|
|
}
|
|
|
|
static int f81534_submit_read_urb(struct usb_serial *serial, gfp_t flags)
|
|
{
|
|
return usb_serial_generic_submit_read_urbs(serial->port[0], flags);
|
|
}
|
|
|
|
static void f81534_msr_changed(struct usb_serial_port *port, u8 msr)
|
|
{
|
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
|
|
struct tty_struct *tty;
|
|
unsigned long flags;
|
|
u8 old_msr;
|
|
|
|
if (!(msr & UART_MSR_ANY_DELTA))
|
|
return;
|
|
|
|
spin_lock_irqsave(&port_priv->msr_lock, flags);
|
|
old_msr = port_priv->shadow_msr;
|
|
port_priv->shadow_msr = msr;
|
|
spin_unlock_irqrestore(&port_priv->msr_lock, flags);
|
|
|
|
dev_dbg(&port->dev, "%s: MSR from %02x to %02x\n", __func__, old_msr,
|
|
msr);
|
|
|
|
/* Update input line counters */
|
|
if (msr & UART_MSR_DCTS)
|
|
port->icount.cts++;
|
|
if (msr & UART_MSR_DDSR)
|
|
port->icount.dsr++;
|
|
if (msr & UART_MSR_DDCD)
|
|
port->icount.dcd++;
|
|
if (msr & UART_MSR_TERI)
|
|
port->icount.rng++;
|
|
|
|
wake_up_interruptible(&port->port.delta_msr_wait);
|
|
|
|
if (!(msr & UART_MSR_DDCD))
|
|
return;
|
|
|
|
dev_dbg(&port->dev, "%s: DCD Changed: phy_num: %d from %x to %x\n",
|
|
__func__, port_priv->phy_num, old_msr, msr);
|
|
|
|
tty = tty_port_tty_get(&port->port);
|
|
if (!tty)
|
|
return;
|
|
|
|
usb_serial_handle_dcd_change(port, tty, msr & UART_MSR_DCD);
|
|
tty_kref_put(tty);
|
|
}
|
|
|
|
static int f81534_read_msr(struct usb_serial_port *port)
|
|
{
|
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
int status;
|
|
u8 msr;
|
|
|
|
/* Get MSR initial value */
|
|
status = f81534_get_port_register(port, F81534_MODEM_STATUS_REG, &msr);
|
|
if (status)
|
|
return status;
|
|
|
|
/* Force update current state */
|
|
spin_lock_irqsave(&port_priv->msr_lock, flags);
|
|
port_priv->shadow_msr = msr;
|
|
spin_unlock_irqrestore(&port_priv->msr_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int f81534_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
struct f81534_serial_private *serial_priv =
|
|
usb_get_serial_data(port->serial);
|
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
|
|
int status;
|
|
|
|
status = f81534_set_port_register(port,
|
|
F81534_FIFO_CONTROL_REG, UART_FCR_ENABLE_FIFO |
|
|
UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
|
|
if (status) {
|
|
dev_err(&port->dev, "%s: Clear FIFO failed: %d\n", __func__,
|
|
status);
|
|
return status;
|
|
}
|
|
|
|
if (tty)
|
|
f81534_set_termios(tty, port, NULL);
|
|
|
|
status = f81534_read_msr(port);
|
|
if (status)
|
|
return status;
|
|
|
|
mutex_lock(&serial_priv->urb_mutex);
|
|
|
|
/* Submit Read URBs for first port opened */
|
|
if (!serial_priv->opened_port) {
|
|
status = f81534_submit_read_urb(port->serial, GFP_KERNEL);
|
|
if (status)
|
|
goto exit;
|
|
}
|
|
|
|
serial_priv->opened_port++;
|
|
|
|
exit:
|
|
mutex_unlock(&serial_priv->urb_mutex);
|
|
|
|
set_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty);
|
|
return status;
|
|
}
|
|
|
|
static void f81534_close(struct usb_serial_port *port)
|
|
{
|
|
struct f81534_serial_private *serial_priv =
|
|
usb_get_serial_data(port->serial);
|
|
struct usb_serial_port *port0 = port->serial->port[0];
|
|
unsigned long flags;
|
|
size_t i;
|
|
|
|
usb_kill_urb(port->write_urbs[0]);
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
kfifo_reset_out(&port->write_fifo);
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
/* Kill Read URBs when final port closed */
|
|
mutex_lock(&serial_priv->urb_mutex);
|
|
serial_priv->opened_port--;
|
|
|
|
if (!serial_priv->opened_port) {
|
|
for (i = 0; i < ARRAY_SIZE(port0->read_urbs); ++i)
|
|
usb_kill_urb(port0->read_urbs[i]);
|
|
}
|
|
|
|
mutex_unlock(&serial_priv->urb_mutex);
|
|
}
|
|
|
|
static int f81534_get_serial_info(struct usb_serial_port *port,
|
|
struct serial_struct __user *retinfo)
|
|
{
|
|
struct f81534_port_private *port_priv;
|
|
struct serial_struct tmp;
|
|
|
|
port_priv = usb_get_serial_port_data(port);
|
|
|
|
memset(&tmp, 0, sizeof(tmp));
|
|
|
|
tmp.type = PORT_16550A;
|
|
tmp.port = port->port_number;
|
|
tmp.line = port->minor;
|
|
tmp.baud_base = F81534_MAX_BAUDRATE;
|
|
|
|
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int f81534_ioctl(struct tty_struct *tty, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct serial_struct __user *buf = (struct serial_struct __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case TIOCGSERIAL:
|
|
return f81534_get_serial_info(port, buf);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static void f81534_process_per_serial_block(struct usb_serial_port *port,
|
|
u8 *data)
|
|
{
|
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
|
|
int phy_num = data[0];
|
|
size_t read_size = 0;
|
|
size_t i;
|
|
char tty_flag;
|
|
int status;
|
|
u8 lsr;
|
|
|
|
/*
|
|
* The block layout is 128 Bytes
|
|
* index 0: port phy idx (e.g., 0,1,2,3),
|
|
* index 1: It's could be
|
|
* F81534_TOKEN_RECEIVE
|
|
* F81534_TOKEN_TX_EMPTY
|
|
* F81534_TOKEN_MSR_CHANGE
|
|
* index 2: serial in size (data+lsr, must be even)
|
|
* meaningful for F81534_TOKEN_RECEIVE only
|
|
* index 3: current MSR with this device
|
|
* index 4~127: serial in data block (data+lsr, must be even)
|
|
*/
|
|
switch (data[1]) {
|
|
case F81534_TOKEN_TX_EMPTY:
|
|
set_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty);
|
|
|
|
/* Try to submit writer */
|
|
status = f81534_submit_writer(port, GFP_ATOMIC);
|
|
if (status)
|
|
dev_err(&port->dev, "%s: submit failed\n", __func__);
|
|
return;
|
|
|
|
case F81534_TOKEN_MSR_CHANGE:
|
|
f81534_msr_changed(port, data[3]);
|
|
return;
|
|
|
|
case F81534_TOKEN_RECEIVE:
|
|
read_size = data[2];
|
|
if (read_size > F81534_MAX_RX_SIZE) {
|
|
dev_err(&port->dev,
|
|
"%s: phy: %d read_size: %zu larger than: %d\n",
|
|
__func__, phy_num, read_size,
|
|
F81534_MAX_RX_SIZE);
|
|
return;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
dev_warn(&port->dev, "%s: unknown token: %02x\n", __func__,
|
|
data[1]);
|
|
return;
|
|
}
|
|
|
|
for (i = 4; i < 4 + read_size; i += 2) {
|
|
tty_flag = TTY_NORMAL;
|
|
lsr = data[i + 1];
|
|
|
|
if (lsr & UART_LSR_BRK_ERROR_BITS) {
|
|
if (lsr & UART_LSR_BI) {
|
|
tty_flag = TTY_BREAK;
|
|
port->icount.brk++;
|
|
usb_serial_handle_break(port);
|
|
} else if (lsr & UART_LSR_PE) {
|
|
tty_flag = TTY_PARITY;
|
|
port->icount.parity++;
|
|
} else if (lsr & UART_LSR_FE) {
|
|
tty_flag = TTY_FRAME;
|
|
port->icount.frame++;
|
|
}
|
|
|
|
if (lsr & UART_LSR_OE) {
|
|
port->icount.overrun++;
|
|
tty_insert_flip_char(&port->port, 0,
|
|
TTY_OVERRUN);
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct f81534_serial_private *serial_priv;
|
|
struct usb_serial_port *port;
|
|
struct usb_serial *serial;
|
|
u8 *buf;
|
|
int phy_port_num;
|
|
int tty_port_num;
|
|
size_t i;
|
|
|
|
if (!urb->actual_length ||
|
|
urb->actual_length % F81534_RECEIVE_BLOCK_SIZE) {
|
|
return;
|
|
}
|
|
|
|
port = urb->context;
|
|
serial = port->serial;
|
|
buf = urb->transfer_buffer;
|
|
serial_priv = usb_get_serial_data(serial);
|
|
|
|
for (i = 0; i < urb->actual_length; i += F81534_RECEIVE_BLOCK_SIZE) {
|
|
phy_port_num = buf[i];
|
|
if (phy_port_num >= F81534_NUM_PORT) {
|
|
dev_err(&port->dev,
|
|
"%s: phy_port_num: %d larger than: %d\n",
|
|
__func__, phy_port_num, F81534_NUM_PORT);
|
|
continue;
|
|
}
|
|
|
|
tty_port_num = serial_priv->tty_idx[phy_port_num];
|
|
port = serial->port[tty_port_num];
|
|
|
|
if (tty_port_initialized(&port->port))
|
|
f81534_process_per_serial_block(port, &buf[i]);
|
|
}
|
|
}
|
|
|
|
static void f81534_write_usb_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
|
|
switch (urb->status) {
|
|
case 0:
|
|
break;
|
|
case -ENOENT:
|
|
case -ECONNRESET:
|
|
case -ESHUTDOWN:
|
|
dev_dbg(&port->dev, "%s - urb stopped: %d\n",
|
|
__func__, urb->status);
|
|
return;
|
|
case -EPIPE:
|
|
dev_err(&port->dev, "%s - urb stopped: %d\n",
|
|
__func__, urb->status);
|
|
return;
|
|
default:
|
|
dev_dbg(&port->dev, "%s - nonzero urb status: %d\n",
|
|
__func__, urb->status);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int f81534_attach(struct usb_serial *serial)
|
|
{
|
|
struct f81534_serial_private *serial_priv;
|
|
int index = 0;
|
|
int status;
|
|
int i;
|
|
|
|
serial_priv = devm_kzalloc(&serial->interface->dev,
|
|
sizeof(*serial_priv), GFP_KERNEL);
|
|
if (!serial_priv)
|
|
return -ENOMEM;
|
|
|
|
usb_set_serial_data(serial, serial_priv);
|
|
|
|
mutex_init(&serial_priv->urb_mutex);
|
|
|
|
/* Check had custom setting */
|
|
status = f81534_find_config_idx(serial, &serial_priv->setting_idx);
|
|
if (status) {
|
|
dev_err(&serial->interface->dev, "%s: find idx failed: %d\n",
|
|
__func__, status);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* We'll read custom data only when data available, otherwise we'll
|
|
* read default value instead.
|
|
*/
|
|
if (serial_priv->setting_idx == F81534_CUSTOM_NO_CUSTOM_DATA) {
|
|
/*
|
|
* The default configuration layout:
|
|
* byte 0/1/2/3: uart setting
|
|
*/
|
|
status = f81534_read_flash(serial,
|
|
F81534_DEF_CONF_ADDRESS_START,
|
|
F81534_DEF_CONF_SIZE,
|
|
serial_priv->conf_data);
|
|
if (status) {
|
|
dev_err(&serial->interface->dev,
|
|
"%s: read reserve data failed: %d\n",
|
|
__func__, status);
|
|
return status;
|
|
}
|
|
} else {
|
|
/* Only read 8 bytes for mode & GPIO */
|
|
status = f81534_read_flash(serial,
|
|
F81534_CUSTOM_ADDRESS_START +
|
|
F81534_CONF_OFFSET,
|
|
sizeof(serial_priv->conf_data),
|
|
serial_priv->conf_data);
|
|
if (status) {
|
|
dev_err(&serial->interface->dev,
|
|
"%s: idx: %d get data failed: %d\n",
|
|
__func__, serial_priv->setting_idx,
|
|
status);
|
|
return status;
|
|
}
|
|
}
|
|
|
|
/* Assign phy-to-logic mapping */
|
|
for (i = 0; i < F81534_NUM_PORT; ++i) {
|
|
if (serial_priv->conf_data[i] & F81534_PORT_UNAVAILABLE)
|
|
continue;
|
|
|
|
serial_priv->tty_idx[i] = index++;
|
|
dev_dbg(&serial->interface->dev,
|
|
"%s: phy_num: %d, tty_idx: %d\n", __func__, i,
|
|
serial_priv->tty_idx[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int f81534_port_probe(struct usb_serial_port *port)
|
|
{
|
|
struct f81534_port_private *port_priv;
|
|
int ret;
|
|
|
|
port_priv = devm_kzalloc(&port->dev, sizeof(*port_priv), GFP_KERNEL);
|
|
if (!port_priv)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&port_priv->msr_lock);
|
|
mutex_init(&port_priv->mcr_mutex);
|
|
|
|
/* Assign logic-to-phy mapping */
|
|
ret = f81534_logic_to_phy_port(port->serial, port);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
port_priv->phy_num = ret;
|
|
usb_set_serial_port_data(port, port_priv);
|
|
dev_dbg(&port->dev, "%s: port_number: %d, phy_num: %d\n", __func__,
|
|
port->port_number, port_priv->phy_num);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int f81534_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
|
|
int status;
|
|
int r;
|
|
u8 msr;
|
|
u8 mcr;
|
|
|
|
/* Read current MSR from device */
|
|
status = f81534_get_port_register(port, F81534_MODEM_STATUS_REG, &msr);
|
|
if (status)
|
|
return status;
|
|
|
|
mutex_lock(&port_priv->mcr_mutex);
|
|
mcr = port_priv->shadow_mcr;
|
|
mutex_unlock(&port_priv->mcr_mutex);
|
|
|
|
r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) |
|
|
(mcr & UART_MCR_RTS ? TIOCM_RTS : 0) |
|
|
(msr & UART_MSR_CTS ? TIOCM_CTS : 0) |
|
|
(msr & UART_MSR_DCD ? TIOCM_CAR : 0) |
|
|
(msr & UART_MSR_RI ? TIOCM_RI : 0) |
|
|
(msr & UART_MSR_DSR ? TIOCM_DSR : 0);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int f81534_tiocmset(struct tty_struct *tty, unsigned int set,
|
|
unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
|
|
return f81534_update_mctrl(port, set, clear);
|
|
}
|
|
|
|
static void f81534_dtr_rts(struct usb_serial_port *port, int on)
|
|
{
|
|
if (on)
|
|
f81534_update_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
|
|
else
|
|
f81534_update_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
|
|
}
|
|
|
|
static int f81534_write(struct tty_struct *tty, struct usb_serial_port *port,
|
|
const u8 *buf, int count)
|
|
{
|
|
int bytes_out, status;
|
|
|
|
if (!count)
|
|
return 0;
|
|
|
|
bytes_out = kfifo_in_locked(&port->write_fifo, buf, count,
|
|
&port->lock);
|
|
|
|
status = f81534_submit_writer(port, GFP_ATOMIC);
|
|
if (status) {
|
|
dev_err(&port->dev, "%s: submit failed\n", __func__);
|
|
return status;
|
|
}
|
|
|
|
return bytes_out;
|
|
}
|
|
|
|
static bool f81534_tx_empty(struct usb_serial_port *port)
|
|
{
|
|
struct f81534_port_private *port_priv = usb_get_serial_port_data(port);
|
|
|
|
return test_bit(F81534_TX_EMPTY_BIT, &port_priv->tx_empty);
|
|
}
|
|
|
|
static int f81534_resume(struct usb_serial *serial)
|
|
{
|
|
struct f81534_serial_private *serial_priv =
|
|
usb_get_serial_data(serial);
|
|
struct usb_serial_port *port;
|
|
int error = 0;
|
|
int status;
|
|
size_t i;
|
|
|
|
/*
|
|
* We'll register port 0 bulkin when port had opened, It'll take all
|
|
* port received data, MSR register change and TX_EMPTY information.
|
|
*/
|
|
mutex_lock(&serial_priv->urb_mutex);
|
|
|
|
if (serial_priv->opened_port) {
|
|
status = f81534_submit_read_urb(serial, GFP_NOIO);
|
|
if (status) {
|
|
mutex_unlock(&serial_priv->urb_mutex);
|
|
return status;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&serial_priv->urb_mutex);
|
|
|
|
for (i = 0; i < serial->num_ports; i++) {
|
|
port = serial->port[i];
|
|
if (!tty_port_initialized(&port->port))
|
|
continue;
|
|
|
|
status = f81534_submit_writer(port, GFP_NOIO);
|
|
if (status) {
|
|
dev_err(&port->dev, "%s: submit failed\n", __func__);
|
|
++error;
|
|
}
|
|
}
|
|
|
|
if (error)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_serial_driver f81534_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "f81534",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.id_table = f81534_id_table,
|
|
.num_bulk_in = 1,
|
|
.num_bulk_out = 1,
|
|
.open = f81534_open,
|
|
.close = f81534_close,
|
|
.write = f81534_write,
|
|
.tx_empty = f81534_tx_empty,
|
|
.calc_num_ports = f81534_calc_num_ports,
|
|
.attach = f81534_attach,
|
|
.port_probe = f81534_port_probe,
|
|
.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, f81534_id_table);
|
|
|
|
MODULE_DEVICE_TABLE(usb, f81534_id_table);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_AUTHOR("Peter Hong <Peter_Hong@fintek.com.tw>");
|
|
MODULE_AUTHOR("Tom Tsai <Tom_Tsai@fintek.com.tw>");
|
|
MODULE_LICENSE("GPL");
|