580 lines
14 KiB
C
580 lines
14 KiB
C
/*
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* usb-serial driver for Quatech SSU-100
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*
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* based on ftdi_sio.c and the original serqt_usb.c from Quatech
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*
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*/
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/serial.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/uaccess.h>
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#define QT_OPEN_CLOSE_CHANNEL 0xca
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#define QT_SET_GET_DEVICE 0xc2
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#define QT_SET_GET_REGISTER 0xc0
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#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
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#define QT_SET_ATF 0xcd
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#define QT_GET_SET_UART 0xc1
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#define QT_TRANSFER_IN 0xc0
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#define QT_HW_FLOW_CONTROL_MASK 0xc5
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#define QT_SW_FLOW_CONTROL_MASK 0xc6
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#define SERIAL_MSR_MASK 0xf0
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#define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS)
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#define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR)
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#define MAX_BAUD_RATE 460800
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#define ATC_DISABLED 0x00
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#define DUPMODE_BITS 0xc0
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#define RR_BITS 0x03
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#define LOOPMODE_BITS 0x41
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#define RS232_MODE 0x00
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#define RTSCTS_TO_CONNECTOR 0x40
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#define CLKS_X4 0x02
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#define FULLPWRBIT 0x00000080
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#define NEXT_BOARD_POWER_BIT 0x00000004
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#define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver"
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#define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */
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#define QUATECH_SSU100 0xC020 /* SSU100 */
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static const struct usb_device_id id_table[] = {
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{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
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{} /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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struct ssu100_port_private {
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spinlock_t status_lock;
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u8 shadowLSR;
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u8 shadowMSR;
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};
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static inline int ssu100_control_msg(struct usb_device *dev,
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u8 request, u16 data, u16 index)
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{
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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request, 0x40, data, index,
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NULL, 0, 300);
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}
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static inline int ssu100_setdevice(struct usb_device *dev, u8 *data)
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{
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u16 x = ((u16)(data[1] << 8) | (u16)(data[0]));
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return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
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}
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static inline int ssu100_getdevice(struct usb_device *dev, u8 *data)
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{
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int ret;
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ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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QT_SET_GET_DEVICE, 0xc0, 0, 0,
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data, 3, 300);
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if (ret < 3) {
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if (ret >= 0)
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ret = -EIO;
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}
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return ret;
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}
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static inline int ssu100_getregister(struct usb_device *dev,
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unsigned short uart,
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unsigned short reg,
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u8 *data)
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{
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int ret;
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ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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QT_SET_GET_REGISTER, 0xc0, reg,
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uart, data, sizeof(*data), 300);
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if (ret < sizeof(*data)) {
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if (ret >= 0)
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ret = -EIO;
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}
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return ret;
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}
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static inline int ssu100_setregister(struct usb_device *dev,
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unsigned short uart,
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unsigned short reg,
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u16 data)
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{
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u16 value = (data << 8) | reg;
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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QT_SET_GET_REGISTER, 0x40, value, uart,
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NULL, 0, 300);
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}
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#define set_mctrl(dev, set) update_mctrl((dev), (set), 0)
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#define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
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/* these do not deal with device that have more than 1 port */
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static inline int update_mctrl(struct usb_device *dev, unsigned int set,
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unsigned int clear)
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{
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unsigned urb_value;
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int result;
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if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
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dev_dbg(&dev->dev, "%s - DTR|RTS not being set|cleared\n", __func__);
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return 0; /* no change */
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}
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clear &= ~set; /* 'set' takes precedence over 'clear' */
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urb_value = 0;
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if (set & TIOCM_DTR)
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urb_value |= UART_MCR_DTR;
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if (set & TIOCM_RTS)
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urb_value |= UART_MCR_RTS;
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result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
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if (result < 0)
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dev_dbg(&dev->dev, "%s Error from MODEM_CTRL urb\n", __func__);
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return result;
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}
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static int ssu100_initdevice(struct usb_device *dev)
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{
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u8 *data;
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int result = 0;
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data = kzalloc(3, GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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result = ssu100_getdevice(dev, data);
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if (result < 0) {
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dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
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goto out;
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}
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data[1] &= ~FULLPWRBIT;
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result = ssu100_setdevice(dev, data);
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if (result < 0) {
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dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
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goto out;
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}
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result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
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if (result < 0) {
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dev_dbg(&dev->dev, "%s - set prebuffer level failed %i\n", __func__, result);
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goto out;
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}
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result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
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if (result < 0) {
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dev_dbg(&dev->dev, "%s - set ATFprebuffer level failed %i\n", __func__, result);
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goto out;
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}
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result = ssu100_getdevice(dev, data);
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if (result < 0) {
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dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
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goto out;
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}
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data[0] &= ~(RR_BITS | DUPMODE_BITS);
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data[0] |= CLKS_X4;
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data[1] &= ~(LOOPMODE_BITS);
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data[1] |= RS232_MODE;
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result = ssu100_setdevice(dev, data);
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if (result < 0) {
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dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
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goto out;
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}
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out: kfree(data);
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return result;
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}
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static void ssu100_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port,
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struct ktermios *old_termios)
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{
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struct usb_device *dev = port->serial->dev;
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struct ktermios *termios = &tty->termios;
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u16 baud, divisor, remainder;
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unsigned int cflag = termios->c_cflag;
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u16 urb_value = 0; /* will hold the new flags */
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int result;
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if (cflag & PARENB) {
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if (cflag & PARODD)
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urb_value |= UART_LCR_PARITY;
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else
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urb_value |= SERIAL_EVEN_PARITY;
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}
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switch (cflag & CSIZE) {
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case CS5:
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urb_value |= UART_LCR_WLEN5;
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break;
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case CS6:
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urb_value |= UART_LCR_WLEN6;
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break;
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case CS7:
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urb_value |= UART_LCR_WLEN7;
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break;
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default:
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case CS8:
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urb_value |= UART_LCR_WLEN8;
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break;
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}
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baud = tty_get_baud_rate(tty);
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if (!baud)
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baud = 9600;
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dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);
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divisor = MAX_BAUD_RATE / baud;
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remainder = MAX_BAUD_RATE % baud;
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if (((remainder * 2) >= baud) && (baud != 110))
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divisor++;
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urb_value = urb_value << 8;
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result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
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if (result < 0)
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dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
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if (cflag & CRTSCTS)
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result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
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SERIAL_CRTSCTS, 0);
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else
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result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
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0, 0);
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if (result < 0)
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dev_dbg(&port->dev, "%s - set HW flow control failed\n", __func__);
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if (I_IXOFF(tty) || I_IXON(tty)) {
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u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty)));
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result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
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x, 0);
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} else
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result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
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0, 0);
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if (result < 0)
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dev_dbg(&port->dev, "%s - set SW flow control failed\n", __func__);
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}
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static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
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{
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struct usb_device *dev = port->serial->dev;
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struct ssu100_port_private *priv = usb_get_serial_port_data(port);
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u8 *data;
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int result;
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unsigned long flags;
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data = kzalloc(2, GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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QT_OPEN_CLOSE_CHANNEL,
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QT_TRANSFER_IN, 0x01,
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0, data, 2, 300);
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if (result < 2) {
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dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
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if (result >= 0)
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result = -EIO;
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kfree(data);
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return result;
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}
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spin_lock_irqsave(&priv->status_lock, flags);
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priv->shadowLSR = data[0];
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priv->shadowMSR = data[1];
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spin_unlock_irqrestore(&priv->status_lock, flags);
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kfree(data);
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/* set to 9600 */
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result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
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if (result < 0)
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dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
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if (tty)
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ssu100_set_termios(tty, port, &tty->termios);
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return usb_serial_generic_open(tty, port);
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}
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static int get_serial_info(struct usb_serial_port *port,
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struct serial_struct __user *retinfo)
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{
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struct serial_struct tmp;
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memset(&tmp, 0, sizeof(tmp));
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tmp.line = port->minor;
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tmp.port = 0;
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tmp.irq = 0;
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tmp.xmit_fifo_size = port->bulk_out_size;
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tmp.baud_base = 9600;
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tmp.close_delay = 5*HZ;
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tmp.closing_wait = 30*HZ;
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if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
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return -EFAULT;
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return 0;
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}
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static int ssu100_ioctl(struct tty_struct *tty,
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unsigned int cmd, unsigned long arg)
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{
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struct usb_serial_port *port = tty->driver_data;
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switch (cmd) {
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case TIOCGSERIAL:
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return get_serial_info(port,
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(struct serial_struct __user *) arg);
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default:
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break;
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}
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return -ENOIOCTLCMD;
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}
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static int ssu100_attach(struct usb_serial *serial)
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{
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return ssu100_initdevice(serial->dev);
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}
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static int ssu100_port_probe(struct usb_serial_port *port)
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{
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struct ssu100_port_private *priv;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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spin_lock_init(&priv->status_lock);
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usb_set_serial_port_data(port, priv);
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return 0;
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}
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static int ssu100_port_remove(struct usb_serial_port *port)
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{
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struct ssu100_port_private *priv;
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priv = usb_get_serial_port_data(port);
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kfree(priv);
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return 0;
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}
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static int ssu100_tiocmget(struct tty_struct *tty)
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{
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struct usb_serial_port *port = tty->driver_data;
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struct usb_device *dev = port->serial->dev;
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u8 *d;
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int r;
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d = kzalloc(2, GFP_KERNEL);
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if (!d)
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return -ENOMEM;
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r = ssu100_getregister(dev, 0, UART_MCR, d);
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if (r < 0)
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goto mget_out;
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r = ssu100_getregister(dev, 0, UART_MSR, d+1);
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if (r < 0)
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goto mget_out;
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r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
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(d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
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(d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
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(d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
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(d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
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(d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
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mget_out:
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kfree(d);
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return r;
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}
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static int ssu100_tiocmset(struct tty_struct *tty,
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unsigned int set, unsigned int clear)
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{
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struct usb_serial_port *port = tty->driver_data;
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struct usb_device *dev = port->serial->dev;
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return update_mctrl(dev, set, clear);
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}
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static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
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{
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struct usb_device *dev = port->serial->dev;
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/* Disable flow control */
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if (!on) {
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if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
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dev_err(&port->dev, "error from flowcontrol urb\n");
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}
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/* drop RTS and DTR */
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if (on)
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set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
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else
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clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
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}
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static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
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{
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struct ssu100_port_private *priv = usb_get_serial_port_data(port);
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unsigned long flags;
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spin_lock_irqsave(&priv->status_lock, flags);
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priv->shadowMSR = msr;
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spin_unlock_irqrestore(&priv->status_lock, flags);
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if (msr & UART_MSR_ANY_DELTA) {
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/* update input line counters */
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if (msr & UART_MSR_DCTS)
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port->icount.cts++;
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if (msr & UART_MSR_DDSR)
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port->icount.dsr++;
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if (msr & UART_MSR_DDCD)
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port->icount.dcd++;
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if (msr & UART_MSR_TERI)
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port->icount.rng++;
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wake_up_interruptible(&port->port.delta_msr_wait);
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}
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}
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static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
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char *tty_flag)
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{
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struct ssu100_port_private *priv = usb_get_serial_port_data(port);
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unsigned long flags;
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spin_lock_irqsave(&priv->status_lock, flags);
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priv->shadowLSR = lsr;
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spin_unlock_irqrestore(&priv->status_lock, flags);
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*tty_flag = TTY_NORMAL;
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if (lsr & UART_LSR_BRK_ERROR_BITS) {
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/* we always want to update icount, but we only want to
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* update tty_flag for one case */
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if (lsr & UART_LSR_BI) {
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port->icount.brk++;
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*tty_flag = TTY_BREAK;
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usb_serial_handle_break(port);
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}
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if (lsr & UART_LSR_PE) {
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port->icount.parity++;
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if (*tty_flag == TTY_NORMAL)
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*tty_flag = TTY_PARITY;
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}
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if (lsr & UART_LSR_FE) {
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port->icount.frame++;
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if (*tty_flag == TTY_NORMAL)
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*tty_flag = TTY_FRAME;
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}
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if (lsr & UART_LSR_OE) {
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port->icount.overrun++;
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tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
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}
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}
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}
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static void ssu100_process_read_urb(struct urb *urb)
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{
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struct usb_serial_port *port = urb->context;
|
|
char *packet = (char *)urb->transfer_buffer;
|
|
char flag = TTY_NORMAL;
|
|
u32 len = urb->actual_length;
|
|
int i;
|
|
char *ch;
|
|
|
|
if ((len >= 4) &&
|
|
(packet[0] == 0x1b) && (packet[1] == 0x1b) &&
|
|
((packet[2] == 0x00) || (packet[2] == 0x01))) {
|
|
if (packet[2] == 0x00)
|
|
ssu100_update_lsr(port, packet[3], &flag);
|
|
if (packet[2] == 0x01)
|
|
ssu100_update_msr(port, packet[3]);
|
|
|
|
len -= 4;
|
|
ch = packet + 4;
|
|
} else
|
|
ch = packet;
|
|
|
|
if (!len)
|
|
return; /* status only */
|
|
|
|
if (port->port.console && port->sysrq) {
|
|
for (i = 0; i < len; i++, ch++) {
|
|
if (!usb_serial_handle_sysrq_char(port, *ch))
|
|
tty_insert_flip_char(&port->port, *ch, flag);
|
|
}
|
|
} else
|
|
tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len);
|
|
|
|
tty_flip_buffer_push(&port->port);
|
|
}
|
|
|
|
static struct usb_serial_driver ssu100_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ssu100",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.id_table = id_table,
|
|
.num_ports = 1,
|
|
.open = ssu100_open,
|
|
.attach = ssu100_attach,
|
|
.port_probe = ssu100_port_probe,
|
|
.port_remove = ssu100_port_remove,
|
|
.dtr_rts = ssu100_dtr_rts,
|
|
.process_read_urb = ssu100_process_read_urb,
|
|
.tiocmget = ssu100_tiocmget,
|
|
.tiocmset = ssu100_tiocmset,
|
|
.tiocmiwait = usb_serial_generic_tiocmiwait,
|
|
.get_icount = usb_serial_generic_get_icount,
|
|
.ioctl = ssu100_ioctl,
|
|
.set_termios = ssu100_set_termios,
|
|
};
|
|
|
|
static struct usb_serial_driver * const serial_drivers[] = {
|
|
&ssu100_device, NULL
|
|
};
|
|
|
|
module_usb_serial_driver(serial_drivers, id_table);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|