diff options
| -rw-r--r-- | drivers/staging/quatech_usb2/quatech_usb2.c | 330 |
1 files changed, 263 insertions, 67 deletions
diff --git a/drivers/staging/quatech_usb2/quatech_usb2.c b/drivers/staging/quatech_usb2/quatech_usb2.c index 77058566007..f71921998ce 100644 --- a/drivers/staging/quatech_usb2/quatech_usb2.c +++ b/drivers/staging/quatech_usb2/quatech_usb2.c @@ -52,12 +52,12 @@ static int debug; #define QT_OPEN_CLOSE_CHANNEL 0xca /*#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc #define QT_SET_ATF 0xcd*/ -#define QT2_GET_SET_REGISTER 0xc0 -#define QT_GET_SET_UART 0xc1 -/*#define QT_HW_FLOW_CONTROL_MASK 0xc5 -#define QT_SW_FLOW_CONTROL_MASK 0xc6 -#define QT_SW_FLOW_CONTROL_DISABLE 0xc7 -#define QT_BREAK_CONTROL 0xc8 +#define QT2_GET_SET_REGISTER 0xc0 +#define QT2_GET_SET_UART 0xc1 +#define QT2_HW_FLOW_CONTROL_MASK 0xc5 +#define QT2_SW_FLOW_CONTROL_MASK 0xc6 +#define QT2_SW_FLOW_CONTROL_DISABLE 0xc7 +/*#define QT_BREAK_CONTROL 0xc8 #define QT_STOP_RECEIVE 0xe0*/ #define QT2_FLUSH_DEVICE 0xc4 #define QT_GET_SET_QMCR 0xe1 @@ -66,34 +66,35 @@ static int debug; #define QT2_FLUSH_RX 0x00 #define QT2_FLUSH_TX 0x01 -/* port setting constants */ -#define SERIAL_MCR_DTR 0x01 -#define SERIAL_MCR_RTS 0x02 -#define SERIAL_MCR_LOOP 0x10 +/* port setting constants, used to set up serial port speeds, flow + * control and so on */ +#define QT2_SERIAL_MCR_DTR 0x01 +#define QT2_SERIAL_MCR_RTS 0x02 +#define QT2_SERIAL_MCR_LOOP 0x10 -#define SERIAL_MSR_CTS 0x10 -#define SERIAL_MSR_CD 0x80 -#define SERIAL_MSR_RI 0x40 -#define SERIAL_MSR_DSR 0x20 -#define SERIAL_MSR_MASK 0xf0 +#define QT2_SERIAL_MSR_CTS 0x10 +#define QT2_SERIAL_MSR_CD 0x80 +#define QT2_SERIAL_MSR_RI 0x40 +#define QT2_SERIAL_MSR_DSR 0x20 +#define QT2_SERIAL_MSR_MASK 0xf0 -#define SERIAL_8_DATA 0x03 -#define SERIAL_7_DATA 0x02 -#define SERIAL_6_DATA 0x01 -#define SERIAL_5_DATA 0x00 +#define QT2_SERIAL_8_DATA 0x03 +#define QT2_SERIAL_7_DATA 0x02 +#define QT2_SERIAL_6_DATA 0x01 +#define QT2_SERIAL_5_DATA 0x00 -#define SERIAL_ODD_PARITY 0X08 -#define SERIAL_EVEN_PARITY 0X18 -#define SERIAL_TWO_STOPB 0x04 -#define SERIAL_ONE_STOPB 0x00 +#define QT2_SERIAL_ODD_PARITY 0X08 +#define QT2_SERIAL_EVEN_PARITY 0X18 +#define QT2_SERIAL_TWO_STOPB 0x04 +#define QT2_SERIAL_ONE_STOPB 0x00 -#define MAX_BAUD_RATE 921600 -#define MAX_BAUD_REMAINDER 4608 +#define QT2_MAX_BAUD_RATE 921600 +#define QT2_MAX_BAUD_REMAINDER 4608 -#define SERIAL_LSR_OE 0x02 -#define SERIAL_LSR_PE 0x04 -#define SERIAL_LSR_FE 0x08 -#define SERIAL_LSR_BI 0x10 +#define QT2_SERIAL_LSR_OE 0x02 +#define QT2_SERIAL_LSR_PE 0x04 +#define QT2_SERIAL_LSR_FE 0x08 +#define QT2_SERIAL_LSR_BI 0x10 /* value of Line Status Register when UART has completed * emptying data out on the line */ @@ -268,11 +269,18 @@ static int qt2_box_set_register(struct usb_serial *serial, unsigned short Value); static int qt2_box_flush(struct usb_serial *serial, unsigned char uart_number, unsigned short rcv_or_xmit); -static int qt2_write(struct tty_struct *tty, struct usb_serial_port *port, +static int qt2_boxsetuart(struct usb_serial *serial, unsigned short Uart_Number, + unsigned short default_divisor, unsigned char default_LCR); +/*static int qt2_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count); static int qt2_tiocmget(struct tty_struct *tty, struct file *file); static int qt2_tiocmset(struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear); + unsigned int set, unsigned int clear);*/ +static int qt2_boxsethw_flowctl(struct usb_serial *serial, + unsigned int UartNumber, bool bSet); +static int qt2_boxsetsw_flowctl(struct usb_serial *serial, __u16 UartNumber, + unsigned char stop_char, unsigned char start_char); +static int qt2_boxunsetsw_flowctl(struct usb_serial *serial, __u16 UartNumber); /* implementation functions, roughly in order of use, are here */ static int qt2_calc_num_ports(struct usb_serial *serial) @@ -452,7 +460,7 @@ int qt2_open(struct tty_struct *tty, struct usb_serial_port *port) struct quatech2_dev *dev_extra; /* extra data for the device */ struct qt2_status_data ChannelData; unsigned short default_divisor = QU2BOXSPD9600; - unsigned char default_LCR = SERIAL_8_DATA; + unsigned char default_LCR = QT2_SERIAL_8_DATA; int status; int result; @@ -495,11 +503,11 @@ int qt2_open(struct tty_struct *tty, struct usb_serial_port *port) return status; } port_extra->shadowLSR = ChannelData.line_status & - (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | - SERIAL_LSR_BI); + (QT2_SERIAL_LSR_OE | QT2_SERIAL_LSR_PE | + QT2_SERIAL_LSR_FE | QT2_SERIAL_LSR_BI); port_extra->shadowMSR = ChannelData.modem_status & - (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | - SERIAL_MSR_CD); + (QT2_SERIAL_MSR_CTS | QT2_SERIAL_MSR_DSR | + QT2_SERIAL_MSR_RI | QT2_SERIAL_MSR_CD); /* port_extra->fifo_empty_flag = true;*/ dbg("qt2_openboxchannel on channel %d completed.", @@ -884,19 +892,19 @@ static int qt2_ioctl(struct tty_struct *tty, struct file *file, switch (cmd) { case TIOCMBIS: if (value & TIOCM_RTS) - mcr_value |= SERIAL_MCR_RTS; + mcr_value |= QT2_SERIAL_MCR_RTS; if (value & TIOCM_DTR) - mcr_value |= SERIAL_MCR_DTR; + mcr_value |= QT2_SERIAL_MCR_DTR; if (value & TIOCM_LOOP) - mcr_value |= SERIAL_MCR_LOOP; + mcr_value |= QT2_SERIAL_MCR_LOOP; break; case TIOCMBIC: if (value & TIOCM_RTS) - mcr_value &= ~SERIAL_MCR_RTS; + mcr_value &= ~QT2_SERIAL_MCR_RTS; if (value & TIOCM_DTR) - mcr_value &= ~SERIAL_MCR_DTR; + mcr_value &= ~QT2_SERIAL_MCR_DTR; if (value & TIOCM_LOOP) - mcr_value &= ~SERIAL_MCR_LOOP; + mcr_value &= ~QT2_SERIAL_MCR_LOOP; break; default: break; @@ -911,7 +919,7 @@ static int qt2_ioctl(struct tty_struct *tty, struct file *file, } else if (cmd == TIOCMIWAIT) { dbg("%s() port %d, cmd == TIOCMIWAIT enter", __func__, port->number); - prev_msr_value = port_extra->shadowMSR & SERIAL_MSR_MASK; + prev_msr_value = port_extra->shadowMSR & QT2_SERIAL_MSR_MASK; while (1) { add_wait_queue(&port_extra->wait, &wait); set_current_state(TASK_INTERRUPTIBLE); @@ -922,21 +930,21 @@ static int qt2_ioctl(struct tty_struct *tty, struct file *file, /* see if a signal woke us up */ if (signal_pending(current)) return -ERESTARTSYS; - msr_value = port_extra->shadowMSR & SERIAL_MSR_MASK; + msr_value = port_extra->shadowMSR & QT2_SERIAL_MSR_MASK; if (msr_value == prev_msr_value) return -EIO; /* no change - error */ if ((arg & TIOCM_RNG && - ((prev_msr_value & SERIAL_MSR_RI) == - (msr_value & SERIAL_MSR_RI))) || + ((prev_msr_value & QT2_SERIAL_MSR_RI) == + (msr_value & QT2_SERIAL_MSR_RI))) || (arg & TIOCM_DSR && - ((prev_msr_value & SERIAL_MSR_DSR) == - (msr_value & SERIAL_MSR_DSR))) || + ((prev_msr_value & QT2_SERIAL_MSR_DSR) == + (msr_value & QT2_SERIAL_MSR_DSR))) || (arg & TIOCM_CD && - ((prev_msr_value & SERIAL_MSR_CD) == - (msr_value & SERIAL_MSR_CD))) || + ((prev_msr_value & QT2_SERIAL_MSR_CD) == + (msr_value & QT2_SERIAL_MSR_CD))) || (arg & TIOCM_CTS && - ((prev_msr_value & SERIAL_MSR_CTS) == - (msr_value & SERIAL_MSR_CTS)))) { + ((prev_msr_value & QT2_SERIAL_MSR_CTS) == + (msr_value & QT2_SERIAL_MSR_CTS)))) { return 0; } } /* end inifinite while */ @@ -952,6 +960,120 @@ static int qt2_ioctl(struct tty_struct *tty, struct file *file, } } +/* Called when the user wishes to change the port settings using the termios + * userspace interface */ +static void qt2_set_termios(struct tty_struct *tty, + struct usb_serial_port *port, struct ktermios *old_termios) +{ + struct usb_serial *serial; /* parent serial device */ + int baud, divisor, remainder; + unsigned char LCR_change_to = 0; + int status; + __u16 UartNumber; + + dbg("%s(): port %d", __func__, port->number); + + serial = port->serial; + + UartNumber = port->number; + + if (old_termios) { + if ((tty->termios->c_cflag == old_termios->c_cflag) && + (RELEVANT_IFLAG(tty->termios->c_iflag) == + RELEVANT_IFLAG(old_termios->c_iflag))) { + dbg("%s(): Nothing to change", __func__); + return; + } + } + + switch (tty->termios->c_cflag) { + case CS5: + LCR_change_to |= QT2_SERIAL_5_DATA; + break; + case CS6: + LCR_change_to |= QT2_SERIAL_6_DATA; + break; + case CS7: + LCR_change_to |= QT2_SERIAL_7_DATA; + break; + default: + case CS8: + LCR_change_to |= QT2_SERIAL_8_DATA; + break; + } + + /* Parity stuff */ + if (tty->termios->c_cflag & PARENB) { + if (tty->termios->c_cflag & PARODD) + LCR_change_to |= QT2_SERIAL_ODD_PARITY; + else + LCR_change_to |= QT2_SERIAL_EVEN_PARITY; + } + if (tty->termios->c_cflag & CSTOPB) + LCR_change_to |= QT2_SERIAL_TWO_STOPB; + else + LCR_change_to |= QT2_SERIAL_ONE_STOPB; + + /* Thats the LCR stuff, go ahead and set it */ + baud = tty_get_baud_rate(tty); + if (!baud) { + /* pick a default, any default... */ + baud = 9600; + } + dbg("%s(): got baud = %d", __func__, baud); + + divisor = QT2_MAX_BAUD_RATE / baud; + remainder = QT2_MAX_BAUD_RATE % baud; + /* Round to nearest divisor */ + if (((remainder * 2) >= baud) && (baud != 110)) + divisor++; + dbg("%s(): setting divisor = %d, QT2_MAX_BAUD_RATE = %d , LCR = 0x%x", + __func__, divisor, QT2_MAX_BAUD_RATE, LCR_change_to); + + status = qt2_boxsetuart(serial, UartNumber, (unsigned short) divisor, + LCR_change_to); + if (status < 0) { + dbg("qt2_boxsetuart() failed"); + return; + } + + /* Now determine flow control */ + if (tty->termios->c_cflag & CRTSCTS) { + dbg("%s(): Enabling HW flow control port %d", __func__, + port->number); + /* Enable RTS/CTS flow control */ + status = qt2_boxsethw_flowctl(serial, UartNumber, true); + if (status < 0) { + dbg("qt2_boxsethw_flowctl() failed"); + return; + } + } else { + /* Disable RTS/CTS flow control */ + dbg("%s(): disabling HW flow control port %d", __func__, + port->number); + status = qt2_boxsethw_flowctl(serial, UartNumber, false); + if (status < 0) { + dbg("qt2_boxsethw_flowctl failed"); + return; + } + } + /* if we are implementing XON/XOFF, set the start and stop character + * in the device */ + if (I_IXOFF(tty) || I_IXON(tty)) { + unsigned char stop_char = STOP_CHAR(tty); + unsigned char start_char = START_CHAR(tty); + status = qt2_boxsetsw_flowctl(serial, UartNumber, stop_char, + start_char); + if (status < 0) + dbg("qt2_boxsetsw_flowctl (enabled) failed"); + } else { + /* disable SW flow control */ + status = qt2_boxunsetsw_flowctl(serial, UartNumber); + if (status < 0) + dbg("qt2_boxunsetsw_flowctl (disabling) failed"); + } +} + static int qt2_tiocmget(struct tty_struct *tty, struct file *file) { struct usb_serial_port *port = tty->driver_data; @@ -977,17 +1099,17 @@ static int qt2_tiocmget(struct tty_struct *tty, struct file *file) QT2_MODEM_STATUS_REGISTER, &msr_value); } if (status >= 0) { - result = ((mcr_value & SERIAL_MCR_DTR) ? TIOCM_DTR : 0) + result = ((mcr_value & QT2_SERIAL_MCR_DTR) ? TIOCM_DTR : 0) /*DTR set */ - | ((mcr_value & SERIAL_MCR_RTS) ? TIOCM_RTS : 0) + | ((mcr_value & QT2_SERIAL_MCR_RTS) ? TIOCM_RTS : 0) /*RTS set */ - | ((msr_value & SERIAL_MSR_CTS) ? TIOCM_CTS : 0) + | ((msr_value & QT2_SERIAL_MSR_CTS) ? TIOCM_CTS : 0) /* CTS set */ - | ((msr_value & SERIAL_MSR_CD) ? TIOCM_CAR : 0) + | ((msr_value & QT2_SERIAL_MSR_CD) ? TIOCM_CAR : 0) /*Carrier detect set */ - | ((msr_value & SERIAL_MSR_RI) ? TIOCM_RI : 0) + | ((msr_value & QT2_SERIAL_MSR_RI) ? TIOCM_RI : 0) /* Ring indicator set */ - | ((msr_value & SERIAL_MSR_DSR) ? TIOCM_DSR : 0); + | ((msr_value & QT2_SERIAL_MSR_DSR) ? TIOCM_DSR : 0); /* DSR set */ return result; } else { @@ -1017,13 +1139,14 @@ static int qt2_tiocmset(struct tty_struct *tty, struct file *file, /* Turn off RTS, DTR and loopback, then only turn on what was asked * for */ - mcr_value &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP); + mcr_value &= ~(QT2_SERIAL_MCR_RTS | QT2_SERIAL_MCR_DTR | + QT2_SERIAL_MCR_LOOP); if (set & TIOCM_RTS) - mcr_value |= SERIAL_MCR_RTS; + mcr_value |= QT2_SERIAL_MCR_RTS; if (set & TIOCM_DTR) - mcr_value |= SERIAL_MCR_DTR; + mcr_value |= QT2_SERIAL_MCR_DTR; if (set & TIOCM_LOOP) - mcr_value |= SERIAL_MCR_LOOP; + mcr_value |= QT2_SERIAL_MCR_LOOP; status = qt2_box_set_register(port->serial, UartNumber, QT2_MODEM_CONTROL_REGISTER, mcr_value); @@ -1162,7 +1285,7 @@ static int qt2_conf_uart(struct usb_serial *serial, unsigned short Uart_Number, UartNumandLCR = (LCR << 8) + Uart_Number; result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), - QT_GET_SET_UART, 0x40, divisor, UartNumandLCR, + QT2_GET_SET_UART, 0x40, divisor, UartNumandLCR, NULL, 0, 300); return result; } @@ -1464,8 +1587,8 @@ static void qt2_process_line_status(struct usb_serial_port *port, { /* obtain the private structure for the port */ struct quatech2_port *port_extra = qt2_get_port_private(port); - port_extra->shadowLSR = LineStatus & (SERIAL_LSR_OE | SERIAL_LSR_PE | - SERIAL_LSR_FE | SERIAL_LSR_BI); + port_extra->shadowLSR = LineStatus & (QT2_SERIAL_LSR_OE | + QT2_SERIAL_LSR_PE | QT2_SERIAL_LSR_FE | QT2_SERIAL_LSR_BI); } static void qt2_process_modem_status(struct usb_serial_port *port, unsigned char ModemStatus) @@ -1602,6 +1725,79 @@ static int qt2_box_flush(struct usb_serial *serial, unsigned char uart_number, return result; } +/** qt2_boxsetuart - Issue a SET_UART vendor-spcific request on the default + * control pipe. If successful sets baud rate divisor and LCR value. + */ +static int qt2_boxsetuart(struct usb_serial *serial, unsigned short Uart_Number, + unsigned short default_divisor, unsigned char default_LCR) +{ + unsigned short UartNumandLCR; + + UartNumandLCR = (default_LCR << 8) + Uart_Number; + + return usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT2_GET_SET_UART, 0x40, default_divisor, UartNumandLCR, + NULL, 0, 300); +} +/** qt2_boxsethw_flowctl - Turn hardware (RTS/CTS) flow control on and off for + * a hardware UART. + */ +static int qt2_boxsethw_flowctl(struct usb_serial *serial, + unsigned int UartNumber, bool bSet) +{ + __u8 MCR_Value = 0; + __u8 MSR_Value = 0; + __u16 MOUT_Value = 0; + + if (bSet == true) { + MCR_Value = QT2_SERIAL_MCR_RTS; + /* flow control, box will clear RTS line to prevent remote + * device from transmitting more chars */ + } else { + /* no flow control to remote device */ + MCR_Value = 0; + } + MOUT_Value = MCR_Value << 8; + + if (bSet == true) { + MSR_Value = QT2_SERIAL_MSR_CTS; + /* flow control on, box will inhibit tx data if CTS line is + * asserted */ + } else { + /* Box will not inhibit tx data due to CTS line */ + MSR_Value = 0; + } + MOUT_Value |= MSR_Value; + return usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT2_HW_FLOW_CONTROL_MASK, 0x40, MOUT_Value, UartNumber, + NULL, 0, 300); +} + +/** qt2_boxsetsw_flowctl - Turn software (XON/XOFF) flow control on for + * a hardware UART, and set the XON and XOFF characters. + */ +static int qt2_boxsetsw_flowctl(struct usb_serial *serial, __u16 UartNumber, + unsigned char stop_char, unsigned char start_char) +{ + __u16 nSWflowout; + + nSWflowout = start_char << 8; + nSWflowout = (unsigned short)stop_char; + return usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT2_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout, UartNumber, + NULL, 0, 300); +} + +/** qt2_boxunsetsw_flowctl - Turn software (XON/XOFF) flow control off for + * a hardware UART. + */ +static int qt2_boxunsetsw_flowctl(struct usb_serial *serial, __u16 UartNumber) +{ + return usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), + QT2_SW_FLOW_CONTROL_DISABLE, 0x40, 0, UartNumber, NULL, + 0, 300); +} + /* * last things in file: stuff to register this driver into the generic * USB serial framework. @@ -1625,8 +1821,8 @@ static struct usb_serial_driver quatech2_device = { .unthrottle = qt_unthrottle,*/ .calc_num_ports = qt2_calc_num_ports, .ioctl = qt2_ioctl, - /*.set_termios = qt_set_termios, - .break_ctl = qt_break,*/ + .set_termios = qt2_set_termios, + /*.break_ctl = qt_break,*/ .tiocmget = qt2_tiocmget, .tiocmset = qt2_tiocmset, .attach = qt2_attach, |