| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Fintek F81232 USB to serial adaptor driver |
| * Fintek F81532A/534A/535/536 USB to 2/4/8/12 serial adaptor driver |
| * |
| * Copyright (C) 2012 Greg Kroah-Hartman (gregkh@linuxfoundation.org) |
| * Copyright (C) 2012 Linux Foundation |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/tty_driver.h> |
| #include <linux/tty_flip.h> |
| #include <linux/serial.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/mutex.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/usb/serial.h> |
| #include <linux/serial_reg.h> |
| |
| #define F81232_ID \ |
| { USB_DEVICE(0x1934, 0x0706) } /* 1 port UART device */ |
| |
| #define F81534A_SERIES_ID \ |
| { USB_DEVICE(0x2c42, 0x1602) }, /* In-Box 2 port UART device */ \ |
| { USB_DEVICE(0x2c42, 0x1604) }, /* In-Box 4 port UART device */ \ |
| { USB_DEVICE(0x2c42, 0x1605) }, /* In-Box 8 port UART device */ \ |
| { USB_DEVICE(0x2c42, 0x1606) }, /* In-Box 12 port UART device */ \ |
| { USB_DEVICE(0x2c42, 0x1608) }, /* Non-Flash type */ \ |
| { USB_DEVICE(0x2c42, 0x1632) }, /* 2 port UART device */ \ |
| { USB_DEVICE(0x2c42, 0x1634) }, /* 4 port UART device */ \ |
| { USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \ |
| { USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */ |
| |
| #define F81534A_CTRL_ID \ |
| { USB_DEVICE(0x2c42, 0x16f8) } /* Global control device */ |
| |
| static const struct usb_device_id f81232_id_table[] = { |
| F81232_ID, |
| { } /* Terminating entry */ |
| }; |
| |
| static const struct usb_device_id f81534a_id_table[] = { |
| F81534A_SERIES_ID, |
| { } /* Terminating entry */ |
| }; |
| |
| static const struct usb_device_id f81534a_ctrl_id_table[] = { |
| F81534A_CTRL_ID, |
| { } /* Terminating entry */ |
| }; |
| |
| static const struct usb_device_id combined_id_table[] = { |
| F81232_ID, |
| F81534A_SERIES_ID, |
| F81534A_CTRL_ID, |
| { } /* Terminating entry */ |
| }; |
| MODULE_DEVICE_TABLE(usb, combined_id_table); |
| |
| /* Maximum baudrate for F81232 */ |
| #define F81232_MAX_BAUDRATE 1500000 |
| #define F81232_DEF_BAUDRATE 9600 |
| |
| /* USB Control EP parameter */ |
| #define F81232_REGISTER_REQUEST 0xa0 |
| #define F81232_GET_REGISTER 0xc0 |
| #define F81232_SET_REGISTER 0x40 |
| #define F81534A_ACCESS_REG_RETRY 2 |
| |
| #define SERIAL_BASE_ADDRESS 0x0120 |
| #define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS) |
| #define INTERRUPT_ENABLE_REGISTER (0x01 + 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) |
| |
| /* |
| * F81232 Clock registers (106h) |
| * |
| * Bit1-0: Clock source selector |
| * 00: 1.846MHz. |
| * 01: 18.46MHz. |
| * 10: 24MHz. |
| * 11: 14.77MHz. |
| */ |
| #define F81232_CLK_REGISTER 0x106 |
| #define F81232_CLK_1_846_MHZ 0 |
| #define F81232_CLK_18_46_MHZ BIT(0) |
| #define F81232_CLK_24_MHZ BIT(1) |
| #define F81232_CLK_14_77_MHZ (BIT(1) | BIT(0)) |
| #define F81232_CLK_MASK GENMASK(1, 0) |
| |
| #define F81534A_MODE_REG 0x107 |
| #define F81534A_TRIGGER_MASK GENMASK(3, 2) |
| #define F81534A_TRIGGER_MULTIPLE_4X BIT(3) |
| #define F81534A_FIFO_128BYTE (BIT(1) | BIT(0)) |
| |
| /* Serial port self GPIO control, 2bytes [control&output data][input data] */ |
| #define F81534A_GPIO_REG 0x10e |
| #define F81534A_GPIO_MODE2_DIR BIT(6) /* 1: input, 0: output */ |
| #define F81534A_GPIO_MODE1_DIR BIT(5) |
| #define F81534A_GPIO_MODE0_DIR BIT(4) |
| #define F81534A_GPIO_MODE2_OUTPUT BIT(2) |
| #define F81534A_GPIO_MODE1_OUTPUT BIT(1) |
| #define F81534A_GPIO_MODE0_OUTPUT BIT(0) |
| |
| #define F81534A_CTRL_CMD_ENABLE_PORT 0x116 |
| |
| struct f81232_private { |
| struct mutex lock; |
| u8 modem_control; |
| u8 modem_status; |
| u8 shadow_lcr; |
| speed_t baud_base; |
| struct work_struct lsr_work; |
| struct work_struct interrupt_work; |
| struct usb_serial_port *port; |
| }; |
| |
| static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 }; |
| static u8 const clock_table[] = { F81232_CLK_1_846_MHZ, F81232_CLK_14_77_MHZ, |
| F81232_CLK_18_46_MHZ, F81232_CLK_24_MHZ }; |
| |
| static int calc_baud_divisor(speed_t baudrate, speed_t clockrate) |
| { |
| if (!baudrate) |
| return 0; |
| |
| return DIV_ROUND_CLOSEST(clockrate, baudrate); |
| } |
| |
| static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val) |
| { |
| int status; |
| struct usb_device *dev = port->serial->dev; |
| |
| status = usb_control_msg_recv(dev, |
| 0, |
| F81232_REGISTER_REQUEST, |
| F81232_GET_REGISTER, |
| reg, |
| 0, |
| val, |
| sizeof(*val), |
| USB_CTRL_GET_TIMEOUT, |
| GFP_KERNEL); |
| if (status) { |
| dev_err(&port->dev, "%s failed status: %d\n", __func__, status); |
| status = usb_translate_errors(status); |
| } |
| |
| return status; |
| } |
| |
| static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val) |
| { |
| int status; |
| struct usb_device *dev = port->serial->dev; |
| |
| status = usb_control_msg_send(dev, |
| 0, |
| F81232_REGISTER_REQUEST, |
| F81232_SET_REGISTER, |
| reg, |
| 0, |
| &val, |
| sizeof(val), |
| USB_CTRL_SET_TIMEOUT, |
| GFP_KERNEL); |
| if (status) { |
| dev_err(&port->dev, "%s failed status: %d\n", __func__, status); |
| status = usb_translate_errors(status); |
| } |
| |
| return status; |
| } |
| |
| static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg, |
| u8 mask, u8 val) |
| { |
| int status; |
| u8 tmp; |
| |
| status = f81232_get_register(port, reg, &tmp); |
| if (status) |
| return status; |
| |
| tmp = (tmp & ~mask) | (val & mask); |
| |
| return f81232_set_register(port, reg, tmp); |
| } |
| |
| static void f81232_read_msr(struct usb_serial_port *port) |
| { |
| int status; |
| u8 current_msr; |
| struct tty_struct *tty; |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| |
| mutex_lock(&priv->lock); |
| status = f81232_get_register(port, MODEM_STATUS_REGISTER, |
| ¤t_msr); |
| if (status) { |
| dev_err(&port->dev, "%s fail, status: %d\n", __func__, status); |
| mutex_unlock(&priv->lock); |
| return; |
| } |
| |
| if (!(current_msr & UART_MSR_ANY_DELTA)) { |
| mutex_unlock(&priv->lock); |
| return; |
| } |
| |
| priv->modem_status = current_msr; |
| |
| if (current_msr & UART_MSR_DCTS) |
| port->icount.cts++; |
| if (current_msr & UART_MSR_DDSR) |
| port->icount.dsr++; |
| if (current_msr & UART_MSR_TERI) |
| port->icount.rng++; |
| if (current_msr & UART_MSR_DDCD) { |
| port->icount.dcd++; |
| tty = tty_port_tty_get(&port->port); |
| if (tty) { |
| usb_serial_handle_dcd_change(port, tty, |
| current_msr & UART_MSR_DCD); |
| |
| tty_kref_put(tty); |
| } |
| } |
| |
| wake_up_interruptible(&port->port.delta_msr_wait); |
| mutex_unlock(&priv->lock); |
| } |
| |
| static int f81232_set_mctrl(struct usb_serial_port *port, |
| unsigned int set, unsigned int clear) |
| { |
| u8 val; |
| int status; |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| |
| if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) |
| return 0; /* no change */ |
| |
| /* 'set' takes precedence over 'clear' */ |
| clear &= ~set; |
| |
| /* force enable interrupt with OUT2 */ |
| mutex_lock(&priv->lock); |
| val = UART_MCR_OUT2 | priv->modem_control; |
| |
| if (clear & TIOCM_DTR) |
| val &= ~UART_MCR_DTR; |
| |
| if (clear & TIOCM_RTS) |
| val &= ~UART_MCR_RTS; |
| |
| if (set & TIOCM_DTR) |
| val |= UART_MCR_DTR; |
| |
| if (set & TIOCM_RTS) |
| val |= UART_MCR_RTS; |
| |
| dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__, |
| val, priv->modem_control); |
| |
| status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val); |
| if (status) { |
| dev_err(&port->dev, "%s set MCR status < 0\n", __func__); |
| mutex_unlock(&priv->lock); |
| return status; |
| } |
| |
| priv->modem_control = val; |
| mutex_unlock(&priv->lock); |
| |
| return 0; |
| } |
| |
| static void f81232_update_line_status(struct usb_serial_port *port, |
| unsigned char *data, |
| size_t actual_length) |
| { |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| |
| if (!actual_length) |
| return; |
| |
| switch (data[0] & 0x07) { |
| case 0x00: /* msr change */ |
| dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]); |
| schedule_work(&priv->interrupt_work); |
| break; |
| case 0x02: /* tx-empty */ |
| break; |
| case 0x04: /* rx data available */ |
| break; |
| case 0x06: /* lsr change */ |
| /* we can forget it. the LSR will read from bulk-in */ |
| dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]); |
| break; |
| } |
| } |
| |
| static void f81232_read_int_callback(struct urb *urb) |
| { |
| struct usb_serial_port *port = urb->context; |
| unsigned char *data = urb->transfer_buffer; |
| unsigned int actual_length = urb->actual_length; |
| int status = urb->status; |
| int retval; |
| |
| switch (status) { |
| case 0: |
| /* success */ |
| break; |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| /* this urb is terminated, clean up */ |
| dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
| __func__, status); |
| return; |
| default: |
| dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
| __func__, status); |
| goto exit; |
| } |
| |
| usb_serial_debug_data(&port->dev, __func__, |
| urb->actual_length, urb->transfer_buffer); |
| |
| f81232_update_line_status(port, data, actual_length); |
| |
| exit: |
| retval = usb_submit_urb(urb, GFP_ATOMIC); |
| if (retval) |
| dev_err(&urb->dev->dev, |
| "%s - usb_submit_urb failed with result %d\n", |
| __func__, retval); |
| } |
| |
| static char f81232_handle_lsr(struct usb_serial_port *port, u8 lsr) |
| { |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| char tty_flag = TTY_NORMAL; |
| |
| if (!(lsr & UART_LSR_BRK_ERROR_BITS)) |
| return tty_flag; |
| |
| 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++; |
| schedule_work(&priv->lsr_work); |
| tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
| } |
| |
| return tty_flag; |
| } |
| |
| static void f81232_process_read_urb(struct urb *urb) |
| { |
| struct usb_serial_port *port = urb->context; |
| unsigned char *data = urb->transfer_buffer; |
| char tty_flag; |
| unsigned int i; |
| u8 lsr; |
| |
| /* |
| * When opening the port we get a 1-byte packet with the current LSR, |
| * which we discard. |
| */ |
| if ((urb->actual_length < 2) || (urb->actual_length % 2)) |
| return; |
| |
| /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */ |
| |
| for (i = 0; i < urb->actual_length; i += 2) { |
| lsr = data[i]; |
| tty_flag = f81232_handle_lsr(port, lsr); |
| |
| if (port->sysrq) { |
| if (usb_serial_handle_sysrq_char(port, data[i + 1])) |
| continue; |
| } |
| |
| tty_insert_flip_char(&port->port, data[i + 1], tty_flag); |
| } |
| |
| tty_flip_buffer_push(&port->port); |
| } |
| |
| static void f81534a_process_read_urb(struct urb *urb) |
| { |
| struct usb_serial_port *port = urb->context; |
| unsigned char *data = urb->transfer_buffer; |
| char tty_flag; |
| unsigned int i; |
| u8 lsr; |
| u8 len; |
| |
| if (urb->actual_length < 3) { |
| dev_err(&port->dev, "short message received: %d\n", |
| urb->actual_length); |
| return; |
| } |
| |
| len = data[0]; |
| if (len != urb->actual_length) { |
| dev_err(&port->dev, "malformed message received: %d (%d)\n", |
| urb->actual_length, len); |
| return; |
| } |
| |
| /* bulk-in data: [LEN][Data.....][LSR] */ |
| lsr = data[len - 1]; |
| tty_flag = f81232_handle_lsr(port, lsr); |
| |
| if (port->sysrq) { |
| for (i = 1; i < len - 1; ++i) { |
| if (!usb_serial_handle_sysrq_char(port, data[i])) { |
| tty_insert_flip_char(&port->port, data[i], |
| tty_flag); |
| } |
| } |
| } else { |
| tty_insert_flip_string_fixed_flag(&port->port, &data[1], |
| tty_flag, len - 2); |
| } |
| |
| tty_flip_buffer_push(&port->port); |
| } |
| |
| static void f81232_break_ctl(struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| int status; |
| |
| mutex_lock(&priv->lock); |
| |
| if (break_state) |
| priv->shadow_lcr |= UART_LCR_SBC; |
| else |
| priv->shadow_lcr &= ~UART_LCR_SBC; |
| |
| status = f81232_set_register(port, LINE_CONTROL_REGISTER, |
| priv->shadow_lcr); |
| if (status) |
| dev_err(&port->dev, "set break failed: %d\n", status); |
| |
| mutex_unlock(&priv->lock); |
| } |
| |
| static int f81232_find_clk(speed_t baudrate) |
| { |
| int idx; |
| |
| for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) { |
| if (baudrate <= baudrate_table[idx] && |
| baudrate_table[idx] % baudrate == 0) |
| return idx; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static void f81232_set_baudrate(struct tty_struct *tty, |
| struct usb_serial_port *port, speed_t baudrate, |
| speed_t old_baudrate) |
| { |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| u8 lcr; |
| int divisor; |
| int status = 0; |
| int i; |
| int idx; |
| speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE }; |
| |
| for (i = 0; i < ARRAY_SIZE(baud_list); ++i) { |
| idx = f81232_find_clk(baud_list[i]); |
| if (idx >= 0) { |
| baudrate = baud_list[i]; |
| tty_encode_baud_rate(tty, baudrate, baudrate); |
| break; |
| } |
| } |
| |
| if (idx < 0) |
| return; |
| |
| priv->baud_base = baudrate_table[idx]; |
| divisor = calc_baud_divisor(baudrate, priv->baud_base); |
| |
| status = f81232_set_mask_register(port, F81232_CLK_REGISTER, |
| F81232_CLK_MASK, clock_table[idx]); |
| if (status) { |
| dev_err(&port->dev, "%s failed to set CLK_REG: %d\n", |
| __func__, status); |
| return; |
| } |
| |
| status = f81232_get_register(port, LINE_CONTROL_REGISTER, |
| &lcr); /* get LCR */ |
| if (status) { |
| dev_err(&port->dev, "%s failed to get LCR: %d\n", |
| __func__, status); |
| return; |
| } |
| |
| status = f81232_set_register(port, LINE_CONTROL_REGISTER, |
| lcr | UART_LCR_DLAB); /* Enable DLAB */ |
| if (status) { |
| dev_err(&port->dev, "%s failed to set DLAB: %d\n", |
| __func__, status); |
| return; |
| } |
| |
| status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER, |
| divisor & 0x00ff); /* low */ |
| if (status) { |
| dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n", |
| __func__, status); |
| goto reapply_lcr; |
| } |
| |
| status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, |
| (divisor & 0xff00) >> 8); /* high */ |
| if (status) { |
| dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n", |
| __func__, status); |
| } |
| |
| reapply_lcr: |
| status = f81232_set_register(port, LINE_CONTROL_REGISTER, |
| lcr & ~UART_LCR_DLAB); |
| if (status) { |
| dev_err(&port->dev, "%s failed to set DLAB: %d\n", |
| __func__, status); |
| } |
| } |
| |
| static int f81232_port_enable(struct usb_serial_port *port) |
| { |
| u8 val; |
| int status; |
| |
| /* fifo on, trigger8, clear TX/RX*/ |
| val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | |
| UART_FCR_CLEAR_XMIT; |
| |
| status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val); |
| if (status) { |
| dev_err(&port->dev, "%s failed to set FCR: %d\n", |
| __func__, status); |
| return status; |
| } |
| |
| /* MSR Interrupt only, LSR will read from Bulk-in odd byte */ |
| status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, |
| UART_IER_MSI); |
| if (status) { |
| dev_err(&port->dev, "%s failed to set IER: %d\n", |
| __func__, status); |
| return status; |
| } |
| |
| return 0; |
| } |
| |
| static int f81232_port_disable(struct usb_serial_port *port) |
| { |
| int status; |
| |
| status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0); |
| if (status) { |
| dev_err(&port->dev, "%s failed to set IER: %d\n", |
| __func__, status); |
| return status; |
| } |
| |
| return 0; |
| } |
| |
| static void f81232_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old_termios) |
| { |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| u8 new_lcr = 0; |
| int status = 0; |
| speed_t baudrate; |
| speed_t old_baud; |
| |
| /* Don't change anything if nothing has changed */ |
| if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) |
| return; |
| |
| if (C_BAUD(tty) == B0) |
| f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); |
| else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) |
| f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); |
| |
| baudrate = tty_get_baud_rate(tty); |
| if (baudrate > 0) { |
| if (old_termios) |
| old_baud = tty_termios_baud_rate(old_termios); |
| else |
| old_baud = F81232_DEF_BAUDRATE; |
| |
| f81232_set_baudrate(tty, port, baudrate, old_baud); |
| } |
| |
| if (C_PARENB(tty)) { |
| new_lcr |= UART_LCR_PARITY; |
| |
| if (!C_PARODD(tty)) |
| new_lcr |= UART_LCR_EPAR; |
| |
| if (C_CMSPAR(tty)) |
| new_lcr |= UART_LCR_SPAR; |
| } |
| |
| if (C_CSTOPB(tty)) |
| new_lcr |= UART_LCR_STOP; |
| |
| new_lcr |= UART_LCR_WLEN(tty_get_char_size(tty->termios.c_cflag)); |
| |
| mutex_lock(&priv->lock); |
| |
| new_lcr |= (priv->shadow_lcr & UART_LCR_SBC); |
| status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr); |
| if (status) { |
| dev_err(&port->dev, "%s failed to set LCR: %d\n", |
| __func__, status); |
| } |
| |
| priv->shadow_lcr = new_lcr; |
| |
| mutex_unlock(&priv->lock); |
| } |
| |
| static int f81232_tiocmget(struct tty_struct *tty) |
| { |
| int r; |
| struct usb_serial_port *port = tty->driver_data; |
| struct f81232_private *port_priv = usb_get_serial_port_data(port); |
| u8 mcr, msr; |
| |
| /* force get current MSR changed state */ |
| f81232_read_msr(port); |
| |
| mutex_lock(&port_priv->lock); |
| mcr = port_priv->modem_control; |
| msr = port_priv->modem_status; |
| mutex_unlock(&port_priv->lock); |
| |
| r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) | |
| (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) | |
| (msr & UART_MSR_CTS ? TIOCM_CTS : 0) | |
| (msr & UART_MSR_DCD ? TIOCM_CAR : 0) | |
| (msr & UART_MSR_RI ? TIOCM_RI : 0) | |
| (msr & UART_MSR_DSR ? TIOCM_DSR : 0); |
| |
| return r; |
| } |
| |
| static int f81232_tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| |
| return f81232_set_mctrl(port, set, clear); |
| } |
| |
| static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port) |
| { |
| int result; |
| |
| result = f81232_port_enable(port); |
| if (result) |
| return result; |
| |
| /* Setup termios */ |
| if (tty) |
| f81232_set_termios(tty, port, NULL); |
| |
| result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
| if (result) { |
| dev_err(&port->dev, "%s - failed submitting interrupt urb," |
| " error %d\n", __func__, result); |
| return result; |
| } |
| |
| result = usb_serial_generic_open(tty, port); |
| if (result) { |
| usb_kill_urb(port->interrupt_in_urb); |
| return result; |
| } |
| |
| return 0; |
| } |
| |
| static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port) |
| { |
| int status; |
| u8 mask; |
| u8 val; |
| |
| val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE; |
| mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE; |
| |
| status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val); |
| if (status) { |
| dev_err(&port->dev, "failed to set MODE_REG: %d\n", status); |
| return status; |
| } |
| |
| return f81232_open(tty, port); |
| } |
| |
| static void f81232_close(struct usb_serial_port *port) |
| { |
| struct f81232_private *port_priv = usb_get_serial_port_data(port); |
| |
| f81232_port_disable(port); |
| usb_serial_generic_close(port); |
| usb_kill_urb(port->interrupt_in_urb); |
| flush_work(&port_priv->interrupt_work); |
| flush_work(&port_priv->lsr_work); |
| } |
| |
| static void f81232_dtr_rts(struct usb_serial_port *port, int on) |
| { |
| if (on) |
| f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0); |
| else |
| f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS); |
| } |
| |
| static bool f81232_tx_empty(struct usb_serial_port *port) |
| { |
| int status; |
| u8 tmp; |
| |
| status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); |
| if (!status) { |
| if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static int f81232_carrier_raised(struct usb_serial_port *port) |
| { |
| u8 msr; |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| |
| mutex_lock(&priv->lock); |
| msr = priv->modem_status; |
| mutex_unlock(&priv->lock); |
| |
| if (msr & UART_MSR_DCD) |
| return 1; |
| return 0; |
| } |
| |
| static void f81232_get_serial(struct tty_struct *tty, struct serial_struct *ss) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct f81232_private *priv = usb_get_serial_port_data(port); |
| |
| ss->baud_base = priv->baud_base; |
| } |
| |
| static void f81232_interrupt_work(struct work_struct *work) |
| { |
| struct f81232_private *priv = |
| container_of(work, struct f81232_private, interrupt_work); |
| |
| f81232_read_msr(priv->port); |
| } |
| |
| static void f81232_lsr_worker(struct work_struct *work) |
| { |
| struct f81232_private *priv; |
| struct usb_serial_port *port; |
| int status; |
| u8 tmp; |
| |
| priv = container_of(work, struct f81232_private, lsr_work); |
| port = priv->port; |
| |
| status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp); |
| if (status) |
| dev_warn(&port->dev, "read LSR failed: %d\n", status); |
| } |
| |
| static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg, |
| u16 size, void *val) |
| { |
| struct usb_device *dev = interface_to_usbdev(intf); |
| int retry = F81534A_ACCESS_REG_RETRY; |
| int status; |
| |
| while (retry--) { |
| status = usb_control_msg_send(dev, |
| 0, |
| F81232_REGISTER_REQUEST, |
| F81232_SET_REGISTER, |
| reg, |
| 0, |
| val, |
| size, |
| USB_CTRL_SET_TIMEOUT, |
| GFP_KERNEL); |
| if (status) { |
| status = usb_translate_errors(status); |
| if (status == -EIO) |
| continue; |
| } |
| |
| break; |
| } |
| |
| if (status) { |
| dev_err(&intf->dev, "failed to set register 0x%x: %d\n", |
| reg, status); |
| } |
| |
| return status; |
| } |
| |
| static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en) |
| { |
| unsigned char enable[2] = {0}; |
| int status; |
| |
| /* |
| * Enable all available serial ports, define as following: |
| * bit 15 : Reset behavior (when HUB got soft reset) |
| * 0: maintain all serial port enabled state. |
| * 1: disable all serial port. |
| * bit 0~11 : Serial port enable bit. |
| */ |
| if (en) { |
| enable[0] = 0xff; |
| enable[1] = 0x8f; |
| } |
| |
| status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT, |
| sizeof(enable), enable); |
| if (status) |
| dev_err(&intf->dev, "failed to enable ports: %d\n", status); |
| |
| return status; |
| } |
| |
| static int f81534a_ctrl_probe(struct usb_interface *intf, |
| const struct usb_device_id *id) |
| { |
| return f81534a_ctrl_enable_all_ports(intf, true); |
| } |
| |
| static void f81534a_ctrl_disconnect(struct usb_interface *intf) |
| { |
| f81534a_ctrl_enable_all_ports(intf, false); |
| } |
| |
| static int f81534a_ctrl_resume(struct usb_interface *intf) |
| { |
| return f81534a_ctrl_enable_all_ports(intf, true); |
| } |
| |
| static int f81232_port_probe(struct usb_serial_port *port) |
| { |
| struct f81232_private *priv; |
| |
| priv = devm_kzalloc(&port->dev, sizeof(*priv), GFP_KERNEL); |
| if (!priv) |
| return -ENOMEM; |
| |
| mutex_init(&priv->lock); |
| INIT_WORK(&priv->interrupt_work, f81232_interrupt_work); |
| INIT_WORK(&priv->lsr_work, f81232_lsr_worker); |
| |
| usb_set_serial_port_data(port, priv); |
| |
| priv->port = port; |
| |
| return 0; |
| } |
| |
| static int f81534a_port_probe(struct usb_serial_port *port) |
| { |
| int status; |
| |
| /* tri-state with pull-high, default RS232 Mode */ |
| status = f81232_set_register(port, F81534A_GPIO_REG, |
| F81534A_GPIO_MODE2_DIR); |
| if (status) |
| return status; |
| |
| return f81232_port_probe(port); |
| } |
| |
| static int f81232_suspend(struct usb_serial *serial, pm_message_t message) |
| { |
| struct usb_serial_port *port = serial->port[0]; |
| struct f81232_private *port_priv = usb_get_serial_port_data(port); |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) |
| usb_kill_urb(port->read_urbs[i]); |
| |
| usb_kill_urb(port->interrupt_in_urb); |
| |
| if (port_priv) { |
| flush_work(&port_priv->interrupt_work); |
| flush_work(&port_priv->lsr_work); |
| } |
| |
| return 0; |
| } |
| |
| static int f81232_resume(struct usb_serial *serial) |
| { |
| struct usb_serial_port *port = serial->port[0]; |
| int result; |
| |
| if (tty_port_initialized(&port->port)) { |
| result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); |
| if (result) { |
| dev_err(&port->dev, "submit interrupt urb failed: %d\n", |
| result); |
| return result; |
| } |
| } |
| |
| return usb_serial_generic_resume(serial); |
| } |
| |
| static struct usb_serial_driver f81232_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "f81232", |
| }, |
| .id_table = f81232_id_table, |
| .num_ports = 1, |
| .bulk_in_size = 256, |
| .bulk_out_size = 256, |
| .open = f81232_open, |
| .close = f81232_close, |
| .dtr_rts = f81232_dtr_rts, |
| .carrier_raised = f81232_carrier_raised, |
| .get_serial = f81232_get_serial, |
| .break_ctl = f81232_break_ctl, |
| .set_termios = f81232_set_termios, |
| .tiocmget = f81232_tiocmget, |
| .tiocmset = f81232_tiocmset, |
| .tiocmiwait = usb_serial_generic_tiocmiwait, |
| .tx_empty = f81232_tx_empty, |
| .process_read_urb = f81232_process_read_urb, |
| .read_int_callback = f81232_read_int_callback, |
| .port_probe = f81232_port_probe, |
| .suspend = f81232_suspend, |
| .resume = f81232_resume, |
| }; |
| |
| static struct usb_serial_driver f81534a_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "f81534a", |
| }, |
| .id_table = f81534a_id_table, |
| .num_ports = 1, |
| .open = f81534a_open, |
| .close = f81232_close, |
| .dtr_rts = f81232_dtr_rts, |
| .carrier_raised = f81232_carrier_raised, |
| .get_serial = f81232_get_serial, |
| .break_ctl = f81232_break_ctl, |
| .set_termios = f81232_set_termios, |
| .tiocmget = f81232_tiocmget, |
| .tiocmset = f81232_tiocmset, |
| .tiocmiwait = usb_serial_generic_tiocmiwait, |
| .tx_empty = f81232_tx_empty, |
| .process_read_urb = f81534a_process_read_urb, |
| .read_int_callback = f81232_read_int_callback, |
| .port_probe = f81534a_port_probe, |
| .suspend = f81232_suspend, |
| .resume = f81232_resume, |
| }; |
| |
| static struct usb_serial_driver * const serial_drivers[] = { |
| &f81232_device, |
| &f81534a_device, |
| NULL, |
| }; |
| |
| static struct usb_driver f81534a_ctrl_driver = { |
| .name = "f81534a_ctrl", |
| .id_table = f81534a_ctrl_id_table, |
| .probe = f81534a_ctrl_probe, |
| .disconnect = f81534a_ctrl_disconnect, |
| .resume = f81534a_ctrl_resume, |
| }; |
| |
| static int __init f81232_init(void) |
| { |
| int status; |
| |
| status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE, |
| KBUILD_MODNAME); |
| if (status) |
| return status; |
| |
| status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, |
| combined_id_table); |
| if (status) { |
| usb_deregister(&f81534a_ctrl_driver); |
| return status; |
| } |
| |
| return 0; |
| } |
| |
| static void __exit f81232_exit(void) |
| { |
| usb_serial_deregister_drivers(serial_drivers); |
| usb_deregister(&f81534a_ctrl_driver); |
| } |
| |
| module_init(f81232_init); |
| module_exit(f81232_exit); |
| |
| MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver"); |
| MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |
| MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>"); |
| MODULE_LICENSE("GPL v2"); |