--- /dev/null
+/*
+ * This code was developed for the Quatech USB line for linux, it used
+ * much of the code developed by Greg Kroah-Hartman for USB serial devices
+ *
+ */
+
+#include <linux/errno.h>
+#include <linux/init.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/serial.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+#include <linux/uaccess.h>
+
+static int debug;
+
+/* Version Information */
+#define DRIVER_VERSION "v2.14"
+#define DRIVER_AUTHOR "Tim Gobeli, Quatech, Inc"
+#define DRIVER_DESC "Quatech USB to Serial Driver"
+
+#define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */
+#define QUATECH_SSU100 0xC020 /* SSU100 */
+#define QUATECH_SSU200 0xC030 /* SSU200 */
+#define QUATECH_DSU100 0xC040 /* DSU100 */
+#define QUATECH_DSU200 0xC050 /* DSU200 */
+#define QUATECH_QSU100 0xC060 /* QSU100 */
+#define QUATECH_QSU200 0xC070 /* QSU200 */
+#define QUATECH_ESU100A 0xC080 /* ESU100A */
+#define QUATECH_ESU100B 0xC081 /* ESU100B */
+#define QUATECH_ESU200A 0xC0A0 /* ESU200A */
+#define QUATECH_ESU200B 0xC0A1 /* ESU200B */
+#define QUATECH_HSU100A 0xC090 /* HSU100A */
+#define QUATECH_HSU100B 0xC091 /* HSU100B */
+#define QUATECH_HSU100C 0xC092 /* HSU100C */
+#define QUATECH_HSU100D 0xC093 /* HSU100D */
+#define QUATECH_HSU200A 0xC0B0 /* HSU200A */
+#define QUATECH_HSU200B 0xC0B1 /* HSU200B */
+#define QUATECH_HSU200C 0xC0B2 /* HSU200C */
+#define QUATECH_HSU200D 0xC0B3 /* HSU200D */
+#define QUATECH_SSU100_2 0xC120 /* SSU100_2 */
+#define QUATECH_DSU100_2 0xC140 /* DSU100_2 */
+#define QUATECH_DSU400_2 0xC150 /* DSU400_2 */
+#define QUATECH_QSU100_2 0xC160 /* QSU100_2 */
+#define QUATECH_QSU400_2 0xC170 /* QSU400_2 */
+#define QUATECH_ESU400_2 0xC180 /* ESU400_2 */
+#define QUATECH_ESU100_2 0xC1A0 /* ESU100_2 */
+
+#define QT_SET_GET_DEVICE 0xc2
+#define QT_OPEN_CLOSE_CHANNEL 0xca
+#define QT_GET_SET_PREBUF_TRIG_LVL 0xcc
+#define QT_SET_ATF 0xcd
+#define QT_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 USBD_TRANSFER_DIRECTION_IN 0xc0
+#define USBD_TRANSFER_DIRECTION_OUT 0x40
+
+#define MAX_BAUD_RATE 460800
+#define MAX_BAUD_REMAINDER 4608
+
+#define DIV_LATCH_LS 0x00
+#define XMT_HOLD_REGISTER 0x00
+#define XVR_BUFFER_REGISTER 0x00
+#define DIV_LATCH_MS 0x01
+#define FIFO_CONTROL_REGISTER 0x02
+#define LINE_CONTROL_REGISTER 0x03
+#define MODEM_CONTROL_REGISTER 0x04
+#define LINE_STATUS_REGISTER 0x05
+#define MODEM_STATUS_REGISTER 0x06
+
+#define SERIAL_MCR_DTR 0x01
+#define SERIAL_MCR_RTS 0x02
+#define 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 SERIAL_8_DATA 0x03
+#define SERIAL_7_DATA 0x02
+#define SERIAL_6_DATA 0x01
+#define 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 DEFAULT_DIVISOR 0x30 /* gives 9600 baud rate */
+#define DEFAULT_LCR SERIAL_8_DATA /* 8, none , 1 */
+
+#define FULLPWRBIT 0x00000080
+#define NEXT_BOARD_POWER_BIT 0x00000004
+
+#define SERIAL_LSR_OE 0x02
+#define SERIAL_LSR_PE 0x04
+#define SERIAL_LSR_FE 0x08
+#define SERIAL_LSR_BI 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 PREFUFF_LEVEL_CONSERVATIVE 128
+#define ATC_DISABLED 0x0
+
+#define RR_BITS 0x03 /* for clearing clock bits */
+#define DUPMODE_BITS 0xc0
+#define CLKS_X4 0x02
+
+#define LOOPMODE_BITS 0x41 /* LOOP1 = b6, LOOP0 = b0 (PORT B) */
+#define ALL_LOOPBACK 0x01
+#define MODEM_CTRL 0x40
+#define RS232_MODE 0x00
+
+static struct usb_device_id serqt_id_table[] = {
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU200)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU200)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU200)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100A)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100B)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200A)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200B)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100A)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100B)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100C)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100D)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200A)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200B)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200C)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200D)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100_2)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100_2)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU400_2)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100_2)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU400_2)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU400_2)},
+ {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100_2)},
+ {} /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, serqt_id_table);
+
+struct qt_get_device_data {
+ __u8 porta;
+ __u8 portb;
+ __u8 portc;
+};
+
+struct qt_open_channel_data {
+ __u8 line_status;
+ __u8 modem_status;
+};
+
+struct quatech_port {
+ int port_num; /* number of the port */
+ struct urb *write_urb; /* write URB for this port */
+ struct urb *read_urb; /* read URB for this port */
+ struct urb *int_urb;
+
+ __u8 shadowLCR; /* last LCR value received */
+ __u8 shadowMCR; /* last MCR value received */
+ __u8 shadowMSR; /* last MSR value received */
+ __u8 shadowLSR; /* last LSR value received */
+ char open_ports;
+
+ /* Used for TIOCMIWAIT */
+ wait_queue_head_t msr_wait;
+ char prev_status, diff_status;
+
+ wait_queue_head_t wait;
+
+ struct async_icount icount;
+
+ struct usb_serial_port *port; /* owner of this object */
+ struct qt_get_device_data DeviceData;
+ spinlock_t lock;
+ bool read_urb_busy;
+ int RxHolding;
+ int ReadBulkStopped;
+ char closePending;
+};
+
+static struct usb_driver serqt_usb_driver = {
+ .name = "quatech-usb-serial",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = serqt_id_table,
+ .no_dynamic_id = 1,
+};
+
+static int port_paranoia_check(struct usb_serial_port *port,
+ const char *function)
+{
+ if (!port) {
+ dbg("%s - port == NULL", function);
+ return -1;
+ }
+ if (!port->serial) {
+ dbg("%s - port->serial == NULL\n", function);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int serial_paranoia_check(struct usb_serial *serial,
+ const char *function)
+{
+ if (!serial) {
+ dbg("%s - serial == NULL\n", function);
+ return -1;
+ }
+
+ if (!serial->type) {
+ dbg("%s - serial->type == NULL!", function);
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline struct quatech_port *qt_get_port_private(struct usb_serial_port
+ *port)
+{
+ return (struct quatech_port *)usb_get_serial_port_data(port);
+}
+
+static inline void qt_set_port_private(struct usb_serial_port *port,
+ struct quatech_port *data)
+{
+ usb_set_serial_port_data(port, (void *)data);
+}
+
+static struct usb_serial *get_usb_serial(struct usb_serial_port *port,
+ const char *function)
+{
+ /* if no port was specified, or it fails a paranoia check */
+ if (!port ||
+ port_paranoia_check(port, function) ||
+ serial_paranoia_check(port->serial, function)) {
+ /*
+ * then say that we dont have a valid usb_serial thing,
+ * which will end up genrating -ENODEV return values
+ */
+ return NULL;
+ }
+
+ return port->serial;
+}
+
+static void ProcessLineStatus(struct quatech_port *qt_port,
+ unsigned char line_status)
+{
+
+ qt_port->shadowLSR =
+ line_status & (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE |
+ SERIAL_LSR_BI);
+ return;
+}
+
+static void ProcessModemStatus(struct quatech_port *qt_port,
+ unsigned char modem_status)
+{
+
+ qt_port->shadowMSR = modem_status;
+ wake_up_interruptible(&qt_port->wait);
+ return;
+}
+
+static void ProcessRxChar(struct usb_serial_port *port, unsigned char Data)
+{
+ struct tty_struct *tty;
+ struct urb *urb = port->read_urb;
+ tty = tty_port_tty_get(&port->port);
+
+ /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */
+
+ if (tty && urb->actual_length) {
+ tty_buffer_request_room(tty, 1);
+ tty_insert_flip_string(tty, &Data, 1);
+ /* tty_flip_buffer_push(tty); */
+ }
+
+ return;
+}
+
+static void qt_write_bulk_callback(struct urb *urb)
+{
+ struct tty_struct *tty;
+ int status;
+ struct quatech_port *quatech_port;
+
+ status = urb->status;
+
+ if (status) {
+ dbg("nonzero write bulk status received:%d\n", status);
+ return;
+ }
+
+ quatech_port = urb->context;
+
+ dbg("%s - port %d\n", __func__, quatech_port->port_num);
+
+ tty = tty_port_tty_get(&quatech_port->port->port);
+
+ if (tty)
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+}
+
+static void qt_interrupt_callback(struct urb *urb)
+{
+ /* FIXME */
+}
+
+static void qt_read_bulk_callback(struct urb *urb)
+{
+
+ struct usb_serial_port *port = urb->context;
+ struct usb_serial *serial = get_usb_serial(port, __func__);
+ struct quatech_port *qt_port = qt_get_port_private(port);
+ unsigned char *data;
+ struct tty_struct *tty;
+ unsigned int index;
+ unsigned int RxCount;
+ int i, result;
+ int flag, flag_data;
+
+ if (urb->status) {
+ qt_port->ReadBulkStopped = 1;
+ dbg("%s - nonzero write bulk status received: %d\n",
+ __func__, urb->status);
+ return;
+ }
+
+ tty = tty_port_tty_get(&port->port);
+ if (!tty) {
+ dbg("%s - bad tty pointer - exiting", __func__);
+ return;
+ }
+
+ data = urb->transfer_buffer;
+
+ RxCount = urb->actual_length;
+
+ /* index = MINOR(port->tty->device) - serial->minor; */
+ index = tty->index - serial->minor;
+
+ dbg("%s - port %d\n", __func__, port->number);
+ dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding);
+
+ if (port_paranoia_check(port, __func__) != 0) {
+ dbg("%s - port_paranoia_check, exiting\n", __func__);
+ qt_port->ReadBulkStopped = 1;
+ return;
+ }
+
+ if (!serial) {
+ dbg("%s - bad serial pointer, exiting\n", __func__);
+ return;
+ }
+ if (qt_port->closePending == 1) {
+ /* Were closing , stop reading */
+ dbg("%s - (qt_port->closepending == 1\n", __func__);
+ qt_port->ReadBulkStopped = 1;
+ return;
+ }
+
+ /*
+ * RxHolding is asserted by throttle, if we assert it, we're not
+ * receiving any more characters and let the box handle the flow
+ * control
+ */
+ if (qt_port->RxHolding == 1) {
+ qt_port->ReadBulkStopped = 1;
+ return;
+ }
+
+ if (urb->status) {
+ qt_port->ReadBulkStopped = 1;
+
+ dbg("%s - nonzero read bulk status received: %d\n",
+ __func__, urb->status);
+ return;
+ }
+
+ if (tty && RxCount) {
+ flag_data = 0;
+ for (i = 0; i < RxCount; ++i) {
+ /* Look ahead code here */
+ if ((i <= (RxCount - 3)) && (data[i] == 0x1b)
+ && (data[i + 1] == 0x1b)) {
+ flag = 0;
+ switch (data[i + 2]) {
+ case 0x00:
+ /* line status change 4th byte must follow */
+ if (i > (RxCount - 4)) {
+ dbg("Illegal escape seuences in received data\n");
+ break;
+ }
+ ProcessLineStatus(qt_port, data[i + 3]);
+ i += 3;
+ flag = 1;
+ break;
+
+ case 0x01:
+ /* Modem status status change 4th byte must follow */
+ dbg("Modem status status. \n");
+ if (i > (RxCount - 4)) {
+ dbg("Illegal escape sequences in received data\n");
+ break;
+ }
+ ProcessModemStatus(qt_port,
+ data[i + 3]);
+ i += 3;
+ flag = 1;
+ break;
+ case 0xff:
+ dbg("No status sequence. \n");
+
+ ProcessRxChar(port, data[i]);
+ ProcessRxChar(port, data[i + 1]);
+ i += 2;
+ break;
+ }
+ if (flag == 1)
+ continue;
+ }
+
+ if (tty && urb->actual_length) {
+ tty_buffer_request_room(tty, 1);
+ tty_insert_flip_string(tty, (data + i), 1);
+ }
+
+ }
+ tty_flip_buffer_push(tty);
+ }
+
+ /* Continue trying to always read */
+ usb_fill_bulk_urb(port->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ port->read_urb->transfer_buffer,
+ port->read_urb->transfer_buffer_length,
+ qt_read_bulk_callback, port);
+ result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+ if (result)
+ dbg("%s - failed resubmitting read urb, error %d",
+ __func__, result);
+ else {
+ if (tty && RxCount) {
+ tty_flip_buffer_push(tty);
+ tty_schedule_flip(tty);
+ }
+ }
+
+ schedule_work(&port->work);
+}
+
+/*
+ * qt_get_device
+ * Issue a GET_DEVICE vendor-specific request on the default control pipe If
+ * successful, fills in the qt_get_device_data structure pointed to by
+ * device_data, otherwise return a negative error number of the problem.
+ */
+
+static int qt_get_device(struct usb_serial *serial,
+ struct qt_get_device_data *device_data)
+{
+ int result;
+ unsigned char *transfer_buffer;
+
+ transfer_buffer =
+ kmalloc(sizeof(struct qt_get_device_data), GFP_KERNEL);
+ if (!transfer_buffer)
+ return -ENOMEM;
+
+ result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ QT_SET_GET_DEVICE, 0xc0, 0, 0,
+ transfer_buffer,
+ sizeof(struct qt_get_device_data), 300);
+ if (result > 0)
+ memcpy(device_data, transfer_buffer,
+ sizeof(struct qt_get_device_data));
+ kfree(transfer_buffer);
+
+ return result;
+}
+
+/****************************************************************************
+ * BoxSetPrebufferLevel
+ TELLS BOX WHEN TO ASSERT FLOW CONTROL
+ ****************************************************************************/
+static int BoxSetPrebufferLevel(struct usb_serial *serial)
+{
+ int result;
+ __u16 buffer_length;
+
+ buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
+ result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_GET_SET_PREBUF_TRIG_LVL, 0x40,
+ buffer_length, 0, NULL, 0, 300);
+ return result;
+}
+
+/****************************************************************************
+ * BoxSetATC
+ TELLS BOX WHEN TO ASSERT automatic transmitter control
+ ****************************************************************************/
+static int BoxSetATC(struct usb_serial *serial, __u16 n_Mode)
+{
+ int result;
+ __u16 buffer_length;
+
+ buffer_length = PREFUFF_LEVEL_CONSERVATIVE;
+
+ result =
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_SET_ATF, 0x40, n_Mode, 0, NULL, 0, 300);
+
+ return result;
+}
+
+/**
+ * qt_set_device
+ * Issue a SET_DEVICE vendor-specific request on the default control pipe If
+ * successful returns the number of bytes written, otherwise it returns a
+ * negative error number of the problem.
+ */
+static int qt_set_device(struct usb_serial *serial,
+ struct qt_get_device_data *device_data)
+{
+ int result;
+ __u16 length;
+ __u16 PortSettings;
+
+ PortSettings = ((__u16) (device_data->portb));
+ PortSettings = (PortSettings << 8);
+ PortSettings += ((__u16) (device_data->porta));
+
+ length = sizeof(struct qt_get_device_data);
+ dbg("%s - PortSettings = 0x%x\n", __func__, PortSettings);
+
+ result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_SET_GET_DEVICE, 0x40, PortSettings,
+ 0, NULL, 0, 300);
+ return result;
+}
+
+static int qt_open_channel(struct usb_serial *serial, __u16 Uart_Number,
+ struct qt_open_channel_data *pDeviceData)
+{
+ int result;
+
+ result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ QT_OPEN_CLOSE_CHANNEL,
+ USBD_TRANSFER_DIRECTION_IN, 1, Uart_Number,
+ pDeviceData,
+ sizeof(struct qt_open_channel_data), 300);
+
+ return result;
+
+}
+
+static int qt_close_channel(struct usb_serial *serial, __u16 Uart_Number)
+{
+ int result;
+
+ result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ QT_OPEN_CLOSE_CHANNEL,
+ USBD_TRANSFER_DIRECTION_OUT, 0, Uart_Number,
+ NULL, 0, 300);
+
+ return result;
+
+}
+
+/****************************************************************************
+* BoxGetRegister
+* issuse a GET_REGISTER vendor-spcific request on the default control pipe
+* If successful, fills in the pValue with the register value asked for
+****************************************************************************/
+static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number,
+ unsigned short Register_Num, __u8 *pValue)
+{
+ int result;
+ __u16 current_length;
+
+ current_length = sizeof(struct qt_get_device_data);
+
+ result =
+ usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ QT_GET_SET_REGISTER, 0xC0, Register_Num,
+ Uart_Number, (void *)pValue, sizeof(*pValue), 300);
+
+ return result;
+}
+
+/****************************************************************************
+* BoxSetRegister
+* issuse a GET_REGISTER vendor-spcific request on the default control pipe
+* If successful, fills in the pValue with the register value asked for
+****************************************************************************/
+static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number,
+ unsigned short Register_Num, unsigned short Value)
+{
+ int result;
+ unsigned short RegAndByte;
+
+ RegAndByte = Value;
+ RegAndByte = RegAndByte << 8;
+ RegAndByte = RegAndByte + Register_Num;
+
+/*
+ result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_GET_SET_REGISTER, 0xC0, Register_Num,
+ Uart_Number, NULL, 0, 300);
+*/
+
+ result =
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_GET_SET_REGISTER, 0x40, RegAndByte, Uart_Number,
+ NULL, 0, 300);
+
+ return result;
+}
+
+/*
+ * qt_setuart
+ * issuse a SET_UART vendor-spcific request on the default control pipe
+ * If successful sets baud rate divisor and LCR value
+ */
+static int qt_setuart(struct usb_serial *serial, unsigned short Uart_Number,
+ unsigned short default_divisor, unsigned char default_LCR)
+{
+ int result;
+ unsigned short UartNumandLCR;
+
+ UartNumandLCR = (default_LCR << 8) + Uart_Number;
+
+ result =
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_GET_SET_UART, 0x40, default_divisor,
+ UartNumandLCR, NULL, 0, 300);
+
+ return result;
+}
+
+static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int index,
+ int bSet)
+{
+ __u8 mcr = 0;
+ __u8 msr = 0, MOUT_Value = 0;
+ unsigned int status;
+
+ if (bSet == 1) {
+ /* flow control, box will clear RTS line to prevent remote */
+ mcr = SERIAL_MCR_RTS;
+ } /* device from xmitting more chars */
+ else {
+ /* no flow control to remote device */
+ mcr = 0;
+
+ }
+ MOUT_Value = mcr << 8;
+
+ if (bSet == 1) {
+ /* flow control, box will inhibit xmit data if CTS line is
+ * asserted */
+ msr = SERIAL_MSR_CTS;
+ } else {
+ /* Box will not inhimbe xmit data due to CTS line */
+ msr = 0;
+ }
+ MOUT_Value |= msr;
+
+ status =
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_HW_FLOW_CONTROL_MASK, 0x40, MOUT_Value,
+ index, NULL, 0, 300);
+ return status;
+
+}
+
+static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 index,
+ unsigned char stop_char, unsigned char start_char)
+{
+ __u16 nSWflowout;
+ int result;
+
+ nSWflowout = start_char << 8;
+ nSWflowout = (unsigned short)stop_char;
+
+ result =
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout,
+ index, NULL, 0, 300);
+ return result;
+
+}
+
+static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 index)
+{
+ int result;
+
+ result =
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, index,
+ NULL, 0, 300);
+ return result;
+
+}
+
+static int qt_startup(struct usb_serial *serial)
+{
+ struct usb_serial_port *port;
+ struct quatech_port *qt_port;
+ struct qt_get_device_data DeviceData;
+ int i;
+ int status;
+
+ dbg("enterting %s", __func__);
+
+ /* Now setup per port private data */
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ qt_port = kzalloc(sizeof(*qt_port), GFP_KERNEL);
+ if (!qt_port) {
+ dbg("%s: kmalloc for quatech_port (%d) failed!.",
+ __func__, i);
+ return -ENOMEM;
+ }
+ spin_lock_init(&qt_port->lock);
+
+ usb_set_serial_port_data(port, qt_port);
+
+ }
+
+ status = qt_get_device(serial, &DeviceData);
+ if (status < 0) {
+ dbg(__FILE__ "box_get_device failed");
+ goto startup_error;
+ }
+
+ dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb);
+
+ DeviceData.portb &= ~FULLPWRBIT;
+ dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb);
+
+ status = qt_set_device(serial, &DeviceData);
+ if (status < 0) {
+ dbg(__FILE__ "qt_set_device failed\n");
+ goto startup_error;
+ }
+
+ status = qt_get_device(serial, &DeviceData);
+ if (status < 0) {
+ dbg(__FILE__ "qt_get_device failed");
+ goto startup_error;
+ }
+
+ switch (serial->dev->descriptor.idProduct) {
+ case QUATECH_SSU100:
+ case QUATECH_DSU100:
+ case QUATECH_QSU100:
+ case QUATECH_ESU100A:
+ case QUATECH_ESU100B:
+ case QUATECH_HSU100A:
+ case QUATECH_HSU100B:
+ case QUATECH_HSU100C:
+ case QUATECH_HSU100D:
+ DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
+ DeviceData.porta |= CLKS_X4;
+ DeviceData.portb &= ~(LOOPMODE_BITS);
+ DeviceData.portb |= RS232_MODE;
+ break;
+
+ case QUATECH_SSU200:
+ case QUATECH_DSU200:
+ case QUATECH_QSU200:
+ case QUATECH_ESU200A:
+ case QUATECH_ESU200B:
+ case QUATECH_HSU200A:
+ case QUATECH_HSU200B:
+ case QUATECH_HSU200C:
+ case QUATECH_HSU200D:
+ DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
+ DeviceData.porta |= CLKS_X4;
+ DeviceData.portb &= ~(LOOPMODE_BITS);
+ DeviceData.portb |= ALL_LOOPBACK;
+ break;
+ default:
+ DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS);
+ DeviceData.porta |= CLKS_X4;
+ DeviceData.portb &= ~(LOOPMODE_BITS);
+ DeviceData.portb |= RS232_MODE;
+ break;
+
+ }
+
+ status = BoxSetPrebufferLevel(serial); /* sets to default value */
+ if (status < 0) {
+ dbg(__FILE__ "BoxSetPrebufferLevel failed\n");
+ goto startup_error;
+ }
+
+ status = BoxSetATC(serial, ATC_DISABLED);
+ if (status < 0) {
+ dbg(__FILE__ "BoxSetATC failed\n");
+ goto startup_error;
+ }
+
+ dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb);
+
+ DeviceData.portb |= NEXT_BOARD_POWER_BIT;
+ dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb);
+
+ status = qt_set_device(serial, &DeviceData);
+ if (status < 0) {
+ dbg(__FILE__ "qt_set_device failed\n");
+ goto startup_error;
+ }
+
+ dbg("Exit Success %s\n", __func__);
+
+ return 0;
+
+startup_error:
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ qt_port = qt_get_port_private(port);
+ kfree(qt_port);
+ usb_set_serial_port_data(port, NULL);
+ }
+
+ dbg("Exit fail %s\n", __func__);
+
+ return -EIO;
+}
+
+static void qt_release(struct usb_serial *serial)
+{
+ struct usb_serial_port *port;
+ struct quatech_port *qt_port;
+ int i;
+
+ dbg("enterting %s", __func__);
+
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ if (!port)
+ continue;
+
+ qt_port = usb_get_serial_port_data(port);
+ kfree(qt_port);
+ usb_set_serial_port_data(port, NULL);
+ }
+
+}
+
+int qt_open(struct tty_struct *tty,
+ struct usb_serial_port *port, struct file *filp)
+{
+ struct usb_serial *serial;
+ struct quatech_port *quatech_port;
+ struct quatech_port *port0;
+ struct qt_open_channel_data ChannelData;
+
+ int result;
+
+ if (port_paranoia_check(port, __func__))
+ return -ENODEV;
+
+ dbg("%s - port %d\n", __func__, port->number);
+
+ serial = port->serial;
+
+ if (serial_paranoia_check(serial, __func__))
+ return -ENODEV;
+
+ quatech_port = qt_get_port_private(port);
+ port0 = qt_get_port_private(serial->port[0]);
+
+ if (quatech_port == NULL || port0 == NULL)
+ return -ENODEV;
+
+ usb_clear_halt(serial->dev, port->write_urb->pipe);
+ usb_clear_halt(serial->dev, port->read_urb->pipe);
+ port0->open_ports++;
+
+ result = qt_get_device(serial, &port0->DeviceData);
+
+ /* Port specific setups */
+ result = qt_open_channel(serial, port->number, &ChannelData);
+ if (result < 0) {
+ dbg(__FILE__ "qt_open_channel failed\n");
+ return result;
+ }
+ dbg(__FILE__ "qt_open_channel completed.\n");
+
+/* FIXME: are these needed? Does it even do anything useful? */
+ quatech_port->shadowLSR = ChannelData.line_status &
+ (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | SERIAL_LSR_BI);
+
+ quatech_port->shadowMSR = ChannelData.modem_status &
+ (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD);
+
+ /* Set Baud rate to default and turn off (default)flow control here */
+ result = qt_setuart(serial, port->number, DEFAULT_DIVISOR, DEFAULT_LCR);
+ if (result < 0) {
+ dbg(__FILE__ "qt_setuart failed\n");
+ return result;
+ }
+ dbg(__FILE__ "qt_setuart completed.\n");
+
+ /*
+ * Put this here to make it responsive to stty and defauls set by
+ * the tty layer
+ */
+ /* FIXME: is this needed? */
+ /* qt_set_termios(tty, port, NULL); */
+
+ /* Check to see if we've set up our endpoint info yet */
+ if (port0->open_ports == 1) {
+ if (serial->port[0]->interrupt_in_buffer == NULL) {
+ /* set up interrupt urb */
+ usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
+ serial->dev,
+ usb_rcvintpipe(serial->dev,
+ serial->port[0]->interrupt_in_endpointAddress),
+ serial->port[0]->interrupt_in_buffer,
+ serial->port[0]->
+ interrupt_in_urb->transfer_buffer_length,
+ qt_interrupt_callback, serial,
+ serial->port[0]->
+ interrupt_in_urb->interval);
+
+ result =
+ usb_submit_urb(serial->port[0]->interrupt_in_urb,
+ GFP_KERNEL);
+ if (result) {
+ dev_err(&port->dev,
+ "%s - Error %d submitting "
+ "interrupt urb\n", __func__, result);
+ }
+
+ }
+
+ }
+
+ dbg("port number is %d \n", port->number);
+ dbg("serial number is %d \n", port->serial->minor);
+ dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
+ dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
+ dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
+ dbg("port's number in the device is %d\n", quatech_port->port_num);
+ quatech_port->read_urb = port->read_urb;
+
+ /* set up our bulk in urb */
+
+ usb_fill_bulk_urb(quatech_port->read_urb,
+ serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ port->bulk_in_buffer,
+ quatech_port->read_urb->transfer_buffer_length,
+ qt_read_bulk_callback, quatech_port);
+
+ dbg("qt_open: bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
+ quatech_port->read_urb_busy = true;
+ result = usb_submit_urb(quatech_port->read_urb, GFP_KERNEL);
+ if (result) {
+ dev_err(&port->dev,
+ "%s - Error %d submitting control urb\n",
+ __func__, result);
+ quatech_port->read_urb_busy = false;
+ }
+
+ /* initialize our wait queues */
+ init_waitqueue_head(&quatech_port->wait);
+ init_waitqueue_head(&quatech_port->msr_wait);
+
+ /* initialize our icount structure */
+ memset(&(quatech_port->icount), 0x00, sizeof(quatech_port->icount));
+
+ return 0;
+
+}
+
+static int qt_chars_in_buffer(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial;
+ int chars = 0;
+
+ serial = get_usb_serial(port, __func__);
+
+ dbg("%s - port %d\n", __func__, port->number);
+
+ if (serial->num_bulk_out) {
+ if (port->write_urb->status == -EINPROGRESS)
+ chars = port->write_urb->transfer_buffer_length;
+ }
+
+ dbg("%s - returns %d\n", __func__, chars);
+
+ return chars;
+}
+
+static void qt_block_until_empty(struct tty_struct *tty,
+ struct quatech_port *qt_port)
+{
+ int timeout = HZ / 10;
+ int wait = 30;
+ int count;
+
+ while (1) {
+
+ count = qt_chars_in_buffer(tty);
+
+ if (count <= 0)
+ return;
+
+ interruptible_sleep_on_timeout(&qt_port->wait, timeout);
+
+ wait--;
+ if (wait == 0) {
+ dbg("%s - TIMEOUT", __func__);
+ return;
+ } else {
+ wait = 30;
+ }
+ }
+}
+
+static void qt_close(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *filp)
+{
+ struct usb_serial *serial = port->serial;
+ struct quatech_port *qt_port;
+ struct quatech_port *port0;
+ int status;
+ unsigned int index;
+ status = 0;
+
+ dbg("%s - port %d\n", __func__, port->number);
+ index = tty->index - serial->minor;
+
+ qt_port = qt_get_port_private(port);
+ port0 = qt_get_port_private(serial->port[0]);
+
+ /* shutdown any bulk reads that might be going on */
+ if (serial->num_bulk_out)
+ usb_unlink_urb(port->write_urb);
+ if (serial->num_bulk_in)
+ usb_unlink_urb(port->read_urb);
+
+ /* wait up to for transmitter to empty */
+ if (serial->dev)
+ qt_block_until_empty(tty, qt_port);
+
+ /* Close uart channel */
+ status = qt_close_channel(serial, index);
+ if (status < 0)
+ dbg("%s - port %d qt_close_channel failed.\n",
+ __func__, port->number);
+
+ port0->open_ports--;
+
+ dbg("qt_num_open_ports in close%d:in port%d\n",
+ port0->open_ports, port->number);
+
+ if (port0->open_ports == 0) {
+ if (serial->port[0]->interrupt_in_urb) {
+ dbg("%s", "Shutdown interrupt_in_urb\n");
+ usb_kill_urb(serial->port[0]->interrupt_in_urb);
+ }
+
+ }
+
+ if (qt_port->write_urb) {
+ /* if this urb had a transfer buffer already (old tx) free it */
+ if (qt_port->write_urb->transfer_buffer != NULL)
+ kfree(qt_port->write_urb->transfer_buffer);
+ usb_free_urb(qt_port->write_urb);
+ }
+
+}
+
+static int qt_write(struct tty_struct *tty, struct usb_serial_port *port,
+ const unsigned char *buf, int count)
+{
+ int result;
+ struct usb_serial *serial = get_usb_serial(port, __func__);
+
+ if (serial == NULL)
+ return -ENODEV;
+
+ dbg("%s - port %d\n", __func__, port->number);
+
+ if (count == 0) {
+ dbg("%s - write request of 0 bytes\n", __func__);
+ return 0;
+ }
+
+ /* only do something if we have a bulk out endpoint */
+ if (serial->num_bulk_out) {
+ if (port->write_urb->status == -EINPROGRESS) {
+ dbg("%s - already writing\n", __func__);
+ return 0;
+ }
+
+ count =
+ (count > port->bulk_out_size) ? port->bulk_out_size : count;
+ memcpy(port->write_urb->transfer_buffer, buf, count);
+
+ /* set up our urb */
+
+ usb_fill_bulk_urb(port->write_urb, serial->dev,
+ usb_sndbulkpipe(serial->dev,
+ port->
+ bulk_out_endpointAddress),
+ port->write_urb->transfer_buffer, count,
+ qt_write_bulk_callback, port);
+
+ /* send the data out the bulk port */
+ result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+ if (result)
+ dbg("%s - failed submitting write urb, error %d\n",
+ __func__, result);
+ else
+ result = count;
+
+ return result;
+ }
+
+ /* no bulk out, so return 0 bytes written */
+ return 0;
+}
+
+static int qt_write_room(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial;
+ struct quatech_port *qt_port;
+ unsigned long flags;
+
+ int retval = -EINVAL;
+
+ if (port_paranoia_check(port, __func__)) {
+ dbg("%s", "Invalid port\n");
+ return -1;
+ }
+
+ serial = get_usb_serial(port, __func__);
+
+ if (!serial)
+ return -ENODEV;
+
+ qt_port = qt_get_port_private(port);
+
+ spin_lock_irqsave(&qt_port->lock, flags);
+
+ dbg("%s - port %d\n", __func__, port->number);
+
+ if (serial->num_bulk_out) {
+ if (port->write_urb->status != -EINPROGRESS)
+ retval = port->bulk_out_size;
+ }
+
+ spin_unlock_irqrestore(&qt_port->lock, flags);
+ return retval;
+
+}
+
+static int qt_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct quatech_port *qt_port = qt_get_port_private(port);
+ struct usb_serial *serial = get_usb_serial(port, __func__);
+ unsigned int index;
+
+ dbg("%s cmd 0x%04x", __func__, cmd);
+
+ index = tty->index - serial->minor;
+
+ if (cmd == TIOCMIWAIT) {
+ while (qt_port != NULL) {
+ interruptible_sleep_on(&qt_port->msr_wait);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ else {
+ char diff = qt_port->diff_status;
+
+ if (diff == 0)
+ return -EIO; /* no change => error */
+
+ /* Consume all events */
+ qt_port->diff_status = 0;
+
+ if (((arg & TIOCM_RNG)
+ && (diff & SERIAL_MSR_RI))
+ || ((arg & TIOCM_DSR)
+ && (diff & SERIAL_MSR_DSR))
+ || ((arg & TIOCM_CD)
+ && (diff & SERIAL_MSR_CD))
+ || ((arg & TIOCM_CTS)
+ && (diff & SERIAL_MSR_CTS))) {
+ return 0;
+ }
+ }
+ }
+ return 0;
+ }
+
+ dbg("%s -No ioctl for that one. port = %d\n", __func__, port->number);
+ return -ENOIOCTLCMD;
+}
+
+static void qt_set_termios(struct tty_struct *tty,
+ struct usb_serial_port *port,
+ struct ktermios *old_termios)
+{
+ struct ktermios *termios = tty->termios;
+ unsigned char new_LCR = 0;
+ unsigned int cflag = termios->c_cflag;
+ unsigned int index;
+ int baud, divisor, remainder;
+ int status;
+
+ dbg("%s", __func__);
+
+ index = tty->index - port->serial->minor;
+
+ switch (cflag) {
+ case CS5:
+ new_LCR |= SERIAL_5_DATA;
+ break;
+ case CS6:
+ new_LCR |= SERIAL_6_DATA;
+ break;
+ case CS7:
+ new_LCR |= SERIAL_7_DATA;
+ break;
+ default:
+ case CS8:
+ new_LCR |= SERIAL_8_DATA;
+ break;
+ }
+
+ /* Parity stuff */
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ new_LCR |= SERIAL_ODD_PARITY;
+ else
+ new_LCR |= SERIAL_EVEN_PARITY;
+ }
+ if (cflag & CSTOPB)
+ new_LCR |= SERIAL_TWO_STOPB;
+ else
+ new_LCR |= SERIAL_TWO_STOPB;
+
+ dbg("%s - 4\n", __func__);
+
+ /* 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\n", __func__, baud);
+
+ divisor = MAX_BAUD_RATE / baud;
+ remainder = MAX_BAUD_RATE % baud;
+ /* Round to nearest divisor */
+ if (((remainder * 2) >= baud) && (baud != 110))
+ divisor++;
+
+ /*
+ * Set Baud rate to default and turn off (default)flow control here
+ */
+ status =
+ qt_setuart(port->serial, index, (unsigned short)divisor, new_LCR);
+ if (status < 0) {
+ dbg(__FILE__ "qt_setuart failed\n");
+ return;
+ }
+
+ /* Now determine flow control */
+ if (cflag & CRTSCTS) {
+ dbg("%s - Enabling HW flow control port %d\n", __func__,
+ port->number);
+
+ /* Enable RTS/CTS flow control */
+ status = BoxSetHW_FlowCtrl(port->serial, index, 1);
+
+ if (status < 0) {
+ dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
+ return;
+ }
+ } else {
+ /* Disable RTS/CTS flow control */
+ dbg("%s - disabling HW flow control port %d\n", __func__,
+ port->number);
+
+ status = BoxSetHW_FlowCtrl(port->serial, index, 0);
+ if (status < 0) {
+ dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n");
+ 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 =
+ BoxSetSW_FlowCtrl(port->serial, index, stop_char,
+ start_char);
+ if (status < 0)
+ dbg(__FILE__ "BoxSetSW_FlowCtrl (enabled) failed\n");
+
+ } else {
+ /* disable SW flow control */
+ status = BoxDisable_SW_FlowCtrl(port->serial, index);
+ if (status < 0)
+ dbg(__FILE__ "BoxSetSW_FlowCtrl (diabling) failed\n");
+
+ }
+ tty->termios->c_cflag &= ~CMSPAR;
+ /* FIXME: Error cases should be returning the actual bits changed only */
+}
+
+static void qt_break(struct tty_struct *tty, int break_state)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = get_usb_serial(port, __func__);
+ struct quatech_port *qt_port;
+ u16 index, onoff;
+ unsigned int result;
+ unsigned long flags;
+
+ index = tty->index - serial->minor;
+
+ qt_port = qt_get_port_private(port);
+
+ if (break_state == -1)
+ onoff = 1;
+ else
+ onoff = 0;
+
+ spin_lock_irqsave(&qt_port->lock, flags);
+
+ dbg("%s - port %d\n", __func__, port->number);
+
+ result =
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT_BREAK_CONTROL, 0x40, onoff, index, NULL, 0, 300);
+
+ spin_unlock_irqrestore(&qt_port->lock, flags);
+}
+
+static inline int qt_real_tiocmget(struct tty_struct *tty,
+ struct usb_serial_port *port,
+ struct file *file, struct usb_serial *serial)
+{
+
+ u8 mcr;
+ u8 msr;
+ unsigned int result = 0;
+ int status;
+ unsigned int index;
+
+ dbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty);
+
+ index = tty->index - serial->minor;
+ status =
+ BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
+ if (status >= 0) {
+ status =
+ BoxGetRegister(port->serial, index,
+ MODEM_STATUS_REGISTER, &msr);
+
+ }
+
+ if (status >= 0) {
+ result = ((mcr & SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
+ /* DTR IS SET */
+ | ((mcr & SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
+ /* RTS IS SET */
+ | ((msr & SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
+ /* CTS is set */
+ | ((msr & SERIAL_MSR_CD) ? TIOCM_CAR : 0)
+ /* Carrier detect is set */
+ | ((msr & SERIAL_MSR_RI) ? TIOCM_RI : 0)
+ /* Ring indicator set */
+ | ((msr & SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
+ /* DSR is set */
+ return result;
+
+ } else
+ return -ESPIPE;
+}
+
+static inline int qt_real_tiocmset(struct tty_struct *tty,
+ struct usb_serial_port *port,
+ struct file *file,
+ struct usb_serial *serial,
+ unsigned int value)
+{
+
+ u8 mcr;
+ int status;
+ unsigned int index;
+
+ dbg("%s - port %d\n", __func__, port->number);
+
+ index = tty->index - serial->minor;
+ status =
+ BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr);
+ if (status < 0)
+ return -ESPIPE;
+
+ /*
+ * Turn off the RTS and DTR and loopbcck and then only turn on what was
+ * asked for
+ */
+ mcr &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP);
+ if (value & TIOCM_RTS)
+ mcr |= SERIAL_MCR_RTS;
+ if (value & TIOCM_DTR)
+ mcr |= SERIAL_MCR_DTR;
+ if (value & TIOCM_LOOP)
+ mcr |= SERIAL_MCR_LOOP;
+
+ status =
+ BoxSetRegister(port->serial, index, MODEM_CONTROL_REGISTER, mcr);
+ if (status < 0)
+ return -ESPIPE;
+ else
+ return 0;
+}
+
+static int qt_tiocmget(struct tty_struct *tty, struct file *file)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = get_usb_serial(port, __func__);
+ struct quatech_port *qt_port = qt_get_port_private(port);
+ int retval = -ENODEV;
+ unsigned long flags;
+
+ dbg("In %s \n", __func__);
+
+ if (!serial)
+ return -ENODEV;
+
+ spin_lock_irqsave(&qt_port->lock, flags);
+
+ dbg("%s - port %d\n", __func__, port->number);
+ dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding);
+
+ retval = qt_real_tiocmget(tty, port, file, serial);
+
+ spin_unlock_irqrestore(&qt_port->lock, flags);
+ return retval;
+}
+
+static int qt_tiocmset(struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = get_usb_serial(port, __func__);
+ struct quatech_port *qt_port = qt_get_port_private(port);
+ unsigned long flags;
+ int retval = -ENODEV;
+
+ dbg("In %s \n", __func__);
+
+ if (!serial)
+ return -ENODEV;
+
+ spin_lock_irqsave(&qt_port->lock, flags);
+
+ dbg("%s - port %d \n", __func__, port->number);
+ dbg("%s - qt_port->RxHolding = %d\n", __func__, qt_port->RxHolding);
+
+ retval = qt_real_tiocmset(tty, port, file, serial, set);
+
+ spin_unlock_irqrestore(&qt_port->lock, flags);
+ return retval;
+}
+
+static void qt_throttle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = get_usb_serial(port, __func__);
+ struct quatech_port *qt_port;
+ unsigned long flags;
+
+ dbg("%s - port %d\n", __func__, port->number);
+
+ if (!serial)
+ return;
+
+ qt_port = qt_get_port_private(port);
+
+ spin_lock_irqsave(&qt_port->lock, flags);
+
+ /* pass on to the driver specific version of this function */
+ qt_port->RxHolding = 1;
+ dbg("%s - port->RxHolding = 1\n", __func__);
+
+ spin_unlock_irqrestore(&qt_port->lock, flags);
+ return;
+}
+
+static void qt_unthrottle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = get_usb_serial(port, __func__);
+ struct quatech_port *qt_port;
+ unsigned long flags;
+ unsigned int result;
+
+ if (!serial)
+ return;
+
+ qt_port = qt_get_port_private(port);
+
+ spin_lock_irqsave(&qt_port->lock, flags);
+
+ dbg("%s - port %d\n", __func__, port->number);
+
+ if (qt_port->RxHolding == 1) {
+ dbg("%s -qt_port->RxHolding == 1\n", __func__);
+
+ qt_port->RxHolding = 0;
+ dbg("%s - qt_port->RxHolding = 0\n", __func__);
+
+ /* if we have a bulk endpoint, start it up */
+ if ((serial->num_bulk_in) && (qt_port->ReadBulkStopped == 1)) {
+ /* Start reading from the device */
+ usb_fill_bulk_urb(port->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ port->read_urb->transfer_buffer,
+ port->read_urb->
+ transfer_buffer_length,
+ qt_read_bulk_callback, port);
+ result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+ if (result)
+ err("%s - failed restarting read urb, error %d",
+ __func__, result);
+ }
+ }
+ spin_unlock_irqrestore(&qt_port->lock, flags);
+ return;
+
+}
+
+static int qt_calc_num_ports(struct usb_serial *serial)
+{
+ int num_ports;
+
+ dbg("numberofendpoints: %d \n",
+ (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
+ dbg("numberofendpoints: %d \n",
+ (int)serial->interface->altsetting->desc.bNumEndpoints);
+
+ num_ports =
+ (serial->interface->cur_altsetting->desc.bNumEndpoints - 1) / 2;
+
+ return num_ports;
+}
+
+static struct usb_serial_driver quatech_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "serqt",
+ },
+ .description = DRIVER_DESC,
+ .usb_driver = &serqt_usb_driver,
+ .id_table = serqt_id_table,
+ .num_ports = 8,
+ .open = qt_open,
+ .close = qt_close,
+ .write = qt_write,
+ .write_room = qt_write_room,
+ .chars_in_buffer = qt_chars_in_buffer,
+ .throttle = qt_throttle,
+ .unthrottle = qt_unthrottle,
+ .calc_num_ports = qt_calc_num_ports,
+ .ioctl = qt_ioctl,
+ .set_termios = qt_set_termios,
+ .break_ctl = qt_break,
+ .tiocmget = qt_tiocmget,
+ .tiocmset = qt_tiocmset,
+ .attach = qt_startup,
+ .release = qt_release,
+};
+
+static int __init serqt_usb_init(void)
+{
+ int retval;
+
+ dbg("%s\n", __func__);
+
+ /* register with usb-serial */
+ retval = usb_serial_register(&quatech_device);
+
+ if (retval)
+ goto failed_usb_serial_register;
+
+ printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
+ DRIVER_DESC "\n");
+
+ /* register with usb */
+
+ retval = usb_register(&serqt_usb_driver);
+ if (retval == 0)
+ return 0;
+
+ /* if we're here, usb_register() failed */
+ usb_serial_deregister(&quatech_device);
+failed_usb_serial_register:
+ return retval;
+}
+
+static void __exit serqt_usb_exit(void)
+{
+ usb_deregister(&serqt_usb_driver);
+ usb_serial_deregister(&quatech_device);
+}
+
+module_init(serqt_usb_init);
+module_exit(serqt_usb_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff