diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/usb/serial/spcp8x5.c | 491 |
1 files changed, 491 insertions, 0 deletions
diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c new file mode 100644 index 000000000..09a972a83 --- /dev/null +++ b/drivers/usb/serial/spcp8x5.c @@ -0,0 +1,491 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * spcp8x5 USB to serial adaptor driver + * + * Copyright (C) 2010-2013 Johan Hovold (jhovold@gmail.com) + * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn) + * Copyright (C) 2006 S1 Corp. + * + * Original driver for 2.6.10 pl2303 driver by + * Greg Kroah-Hartman (greg@kroah.com) + * Changes for 2.6.20 by Harald Klein <hari@vt100.at> + */ +#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/module.h> +#include <linux/spinlock.h> +#include <linux/usb.h> +#include <linux/usb/serial.h> + +#define DRIVER_DESC "SPCP8x5 USB to serial adaptor driver" + +#define SPCP825_QUIRK_NO_UART_STATUS 0x01 +#define SPCP825_QUIRK_NO_WORK_MODE 0x02 + +#define SPCP8x5_007_VID 0x04FC +#define SPCP8x5_007_PID 0x0201 +#define SPCP8x5_008_VID 0x04fc +#define SPCP8x5_008_PID 0x0235 +#define SPCP8x5_PHILIPS_VID 0x0471 +#define SPCP8x5_PHILIPS_PID 0x081e +#define SPCP8x5_INTERMATIC_VID 0x04FC +#define SPCP8x5_INTERMATIC_PID 0x0204 +#define SPCP8x5_835_VID 0x04fc +#define SPCP8x5_835_PID 0x0231 + +static const struct usb_device_id id_table[] = { + { USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)}, + { USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)}, + { USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)}, + { USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)}, + { USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID), + .driver_info = SPCP825_QUIRK_NO_UART_STATUS | + SPCP825_QUIRK_NO_WORK_MODE }, + { } /* Terminating entry */ +}; +MODULE_DEVICE_TABLE(usb, id_table); + +struct spcp8x5_usb_ctrl_arg { + u8 type; + u8 cmd; + u8 cmd_type; + u16 value; + u16 index; + u16 length; +}; + + +/* spcp8x5 spec register define */ +#define MCR_CONTROL_LINE_RTS 0x02 +#define MCR_CONTROL_LINE_DTR 0x01 +#define MCR_DTR 0x01 +#define MCR_RTS 0x02 + +#define MSR_STATUS_LINE_DCD 0x80 +#define MSR_STATUS_LINE_RI 0x40 +#define MSR_STATUS_LINE_DSR 0x20 +#define MSR_STATUS_LINE_CTS 0x10 + +/* verdor command here , we should define myself */ +#define SET_DEFAULT 0x40 +#define SET_DEFAULT_TYPE 0x20 + +#define SET_UART_FORMAT 0x40 +#define SET_UART_FORMAT_TYPE 0x21 +#define SET_UART_FORMAT_SIZE_5 0x00 +#define SET_UART_FORMAT_SIZE_6 0x01 +#define SET_UART_FORMAT_SIZE_7 0x02 +#define SET_UART_FORMAT_SIZE_8 0x03 +#define SET_UART_FORMAT_STOP_1 0x00 +#define SET_UART_FORMAT_STOP_2 0x04 +#define SET_UART_FORMAT_PAR_NONE 0x00 +#define SET_UART_FORMAT_PAR_ODD 0x10 +#define SET_UART_FORMAT_PAR_EVEN 0x30 +#define SET_UART_FORMAT_PAR_MASK 0xD0 +#define SET_UART_FORMAT_PAR_SPACE 0x90 + +#define GET_UART_STATUS_TYPE 0xc0 +#define GET_UART_STATUS 0x22 +#define GET_UART_STATUS_MSR 0x06 + +#define SET_UART_STATUS 0x40 +#define SET_UART_STATUS_TYPE 0x23 +#define SET_UART_STATUS_MCR 0x0004 +#define SET_UART_STATUS_MCR_DTR 0x01 +#define SET_UART_STATUS_MCR_RTS 0x02 +#define SET_UART_STATUS_MCR_LOOP 0x10 + +#define SET_WORKING_MODE 0x40 +#define SET_WORKING_MODE_TYPE 0x24 +#define SET_WORKING_MODE_U2C 0x00 +#define SET_WORKING_MODE_RS485 0x01 +#define SET_WORKING_MODE_PDMA 0x02 +#define SET_WORKING_MODE_SPP 0x03 + +#define SET_FLOWCTL_CHAR 0x40 +#define SET_FLOWCTL_CHAR_TYPE 0x25 + +#define GET_VERSION 0xc0 +#define GET_VERSION_TYPE 0x26 + +#define SET_REGISTER 0x40 +#define SET_REGISTER_TYPE 0x27 + +#define GET_REGISTER 0xc0 +#define GET_REGISTER_TYPE 0x28 + +#define SET_RAM 0x40 +#define SET_RAM_TYPE 0x31 + +#define GET_RAM 0xc0 +#define GET_RAM_TYPE 0x32 + +/* how come ??? */ +#define UART_STATE 0x08 +#define UART_STATE_TRANSIENT_MASK 0x75 +#define UART_DCD 0x01 +#define UART_DSR 0x02 +#define UART_BREAK_ERROR 0x04 +#define UART_RING 0x08 +#define UART_FRAME_ERROR 0x10 +#define UART_PARITY_ERROR 0x20 +#define UART_OVERRUN_ERROR 0x40 +#define UART_CTS 0x80 + +struct spcp8x5_private { + unsigned quirks; + spinlock_t lock; + u8 line_control; +}; + +static int spcp8x5_probe(struct usb_serial *serial, + const struct usb_device_id *id) +{ + usb_set_serial_data(serial, (void *)id); + + return 0; +} + +static int spcp8x5_port_probe(struct usb_serial_port *port) +{ + const struct usb_device_id *id = usb_get_serial_data(port->serial); + struct spcp8x5_private *priv; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + spin_lock_init(&priv->lock); + priv->quirks = id->driver_info; + + usb_set_serial_port_data(port, priv); + + port->port.drain_delay = 256; + + return 0; +} + +static void spcp8x5_port_remove(struct usb_serial_port *port) +{ + struct spcp8x5_private *priv; + + priv = usb_get_serial_port_data(port); + kfree(priv); +} + +static int spcp8x5_set_ctrl_line(struct usb_serial_port *port, u8 mcr) +{ + struct spcp8x5_private *priv = usb_get_serial_port_data(port); + struct usb_device *dev = port->serial->dev; + int retval; + + if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS) + return -EPERM; + + retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + SET_UART_STATUS_TYPE, SET_UART_STATUS, + mcr, 0x04, NULL, 0, 100); + if (retval != 0) { + dev_err(&port->dev, "failed to set control lines: %d\n", + retval); + } + return retval; +} + +static int spcp8x5_get_msr(struct usb_serial_port *port, u8 *status) +{ + struct spcp8x5_private *priv = usb_get_serial_port_data(port); + struct usb_device *dev = port->serial->dev; + u8 *buf; + int ret; + + if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS) + return -EPERM; + + buf = kzalloc(1, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), + GET_UART_STATUS, GET_UART_STATUS_TYPE, + 0, GET_UART_STATUS_MSR, buf, 1, 100); + if (ret < 1) { + dev_err(&port->dev, "failed to get modem status: %d\n", ret); + if (ret >= 0) + ret = -EIO; + goto out; + } + + dev_dbg(&port->dev, "0xc0:0x22:0:6 %d - 0x02%x\n", ret, *buf); + *status = *buf; + ret = 0; +out: + kfree(buf); + + return ret; +} + +static void spcp8x5_set_work_mode(struct usb_serial_port *port, u16 value, + u16 index) +{ + struct spcp8x5_private *priv = usb_get_serial_port_data(port); + struct usb_device *dev = port->serial->dev; + int ret; + + if (priv->quirks & SPCP825_QUIRK_NO_WORK_MODE) + return; + + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + SET_WORKING_MODE_TYPE, SET_WORKING_MODE, + value, index, NULL, 0, 100); + dev_dbg(&port->dev, "value = %#x , index = %#x\n", value, index); + if (ret < 0) + dev_err(&port->dev, "failed to set work mode: %d\n", ret); +} + +static int spcp8x5_carrier_raised(struct usb_serial_port *port) +{ + u8 msr; + int ret; + + ret = spcp8x5_get_msr(port, &msr); + if (ret || msr & MSR_STATUS_LINE_DCD) + return 1; + + return 0; +} + +static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on) +{ + struct spcp8x5_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + u8 control; + + spin_lock_irqsave(&priv->lock, flags); + if (on) + priv->line_control = MCR_CONTROL_LINE_DTR + | MCR_CONTROL_LINE_RTS; + else + priv->line_control &= ~ (MCR_CONTROL_LINE_DTR + | MCR_CONTROL_LINE_RTS); + control = priv->line_control; + spin_unlock_irqrestore(&priv->lock, flags); + spcp8x5_set_ctrl_line(port, control); +} + +static void spcp8x5_init_termios(struct tty_struct *tty) +{ + tty_encode_baud_rate(tty, 115200, 115200); +} + +static void spcp8x5_set_termios(struct tty_struct *tty, + struct usb_serial_port *port, + const struct ktermios *old_termios) +{ + struct usb_serial *serial = port->serial; + struct spcp8x5_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + unsigned int cflag = tty->termios.c_cflag; + unsigned short uartdata; + unsigned char buf[2] = {0, 0}; + int baud; + int i; + u8 control; + + /* check that they really want us to change something */ + if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) + return; + + /* set DTR/RTS active */ + spin_lock_irqsave(&priv->lock, flags); + control = priv->line_control; + if (old_termios && (old_termios->c_cflag & CBAUD) == B0) { + priv->line_control |= MCR_DTR; + if (!(old_termios->c_cflag & CRTSCTS)) + priv->line_control |= MCR_RTS; + } + if (control != priv->line_control) { + control = priv->line_control; + spin_unlock_irqrestore(&priv->lock, flags); + spcp8x5_set_ctrl_line(port, control); + } else { + spin_unlock_irqrestore(&priv->lock, flags); + } + + /* Set Baud Rate */ + baud = tty_get_baud_rate(tty); + switch (baud) { + case 300: buf[0] = 0x00; break; + case 600: buf[0] = 0x01; break; + case 1200: buf[0] = 0x02; break; + case 2400: buf[0] = 0x03; break; + case 4800: buf[0] = 0x04; break; + case 9600: buf[0] = 0x05; break; + case 19200: buf[0] = 0x07; break; + case 38400: buf[0] = 0x09; break; + case 57600: buf[0] = 0x0a; break; + case 115200: buf[0] = 0x0b; break; + case 230400: buf[0] = 0x0c; break; + case 460800: buf[0] = 0x0d; break; + case 921600: buf[0] = 0x0e; break; +/* case 1200000: buf[0] = 0x0f; break; */ +/* case 2400000: buf[0] = 0x10; break; */ + case 3000000: buf[0] = 0x11; break; +/* case 6000000: buf[0] = 0x12; break; */ + case 0: + case 1000000: + buf[0] = 0x0b; break; + default: + dev_err(&port->dev, "unsupported baudrate, using 9600\n"); + } + + /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */ + switch (cflag & CSIZE) { + case CS5: + buf[1] |= SET_UART_FORMAT_SIZE_5; + break; + case CS6: + buf[1] |= SET_UART_FORMAT_SIZE_6; + break; + case CS7: + buf[1] |= SET_UART_FORMAT_SIZE_7; + break; + default: + case CS8: + buf[1] |= SET_UART_FORMAT_SIZE_8; + break; + } + + /* Set Stop bit2 : 0:1bit 1:2bit */ + buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 : + SET_UART_FORMAT_STOP_1; + + /* Set Parity bit3-4 01:Odd 11:Even */ + if (cflag & PARENB) { + buf[1] |= (cflag & PARODD) ? + SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ; + } else { + buf[1] |= SET_UART_FORMAT_PAR_NONE; + } + uartdata = buf[0] | buf[1]<<8; + + i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + SET_UART_FORMAT_TYPE, SET_UART_FORMAT, + uartdata, 0, NULL, 0, 100); + if (i < 0) + dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n", + uartdata, i); + dev_dbg(&port->dev, "0x21:0x40:0:0 %d\n", i); + + if (cflag & CRTSCTS) { + /* enable hardware flow control */ + spcp8x5_set_work_mode(port, 0x000a, SET_WORKING_MODE_U2C); + } +} + +static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port) +{ + struct usb_serial *serial = port->serial; + struct spcp8x5_private *priv = usb_get_serial_port_data(port); + int ret; + + usb_clear_halt(serial->dev, port->write_urb->pipe); + usb_clear_halt(serial->dev, port->read_urb->pipe); + + ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + 0x09, 0x00, + 0x01, 0x00, NULL, 0x00, 100); + if (ret) + return ret; + + spcp8x5_set_ctrl_line(port, priv->line_control); + + if (tty) + spcp8x5_set_termios(tty, port, NULL); + + return usb_serial_generic_open(tty, port); +} + +static int spcp8x5_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) +{ + struct usb_serial_port *port = tty->driver_data; + struct spcp8x5_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + u8 control; + + spin_lock_irqsave(&priv->lock, flags); + if (set & TIOCM_RTS) + priv->line_control |= MCR_RTS; + if (set & TIOCM_DTR) + priv->line_control |= MCR_DTR; + if (clear & TIOCM_RTS) + priv->line_control &= ~MCR_RTS; + if (clear & TIOCM_DTR) + priv->line_control &= ~MCR_DTR; + control = priv->line_control; + spin_unlock_irqrestore(&priv->lock, flags); + + return spcp8x5_set_ctrl_line(port, control); +} + +static int spcp8x5_tiocmget(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct spcp8x5_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + unsigned int mcr; + u8 status; + unsigned int result; + + result = spcp8x5_get_msr(port, &status); + if (result) + return result; + + spin_lock_irqsave(&priv->lock, flags); + mcr = priv->line_control; + spin_unlock_irqrestore(&priv->lock, flags); + + result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) + | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) + | ((status & MSR_STATUS_LINE_CTS) ? TIOCM_CTS : 0) + | ((status & MSR_STATUS_LINE_DSR) ? TIOCM_DSR : 0) + | ((status & MSR_STATUS_LINE_RI) ? TIOCM_RI : 0) + | ((status & MSR_STATUS_LINE_DCD) ? TIOCM_CD : 0); + + return result; +} + +static struct usb_serial_driver spcp8x5_device = { + .driver = { + .owner = THIS_MODULE, + .name = "SPCP8x5", + }, + .id_table = id_table, + .num_ports = 1, + .num_bulk_in = 1, + .num_bulk_out = 1, + .open = spcp8x5_open, + .dtr_rts = spcp8x5_dtr_rts, + .carrier_raised = spcp8x5_carrier_raised, + .set_termios = spcp8x5_set_termios, + .init_termios = spcp8x5_init_termios, + .tiocmget = spcp8x5_tiocmget, + .tiocmset = spcp8x5_tiocmset, + .probe = spcp8x5_probe, + .port_probe = spcp8x5_port_probe, + .port_remove = spcp8x5_port_remove, +}; + +static struct usb_serial_driver * const serial_drivers[] = { + &spcp8x5_device, NULL +}; + +module_usb_serial_driver(serial_drivers, id_table); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); |