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path: root/drivers/staging/quatech_usb2
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-rw-r--r--drivers/staging/quatech_usb2/quatech_usb2.c330
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 770585660075..f71921998ce2 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,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 20:08:58 +0000