| /* |
| * 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 const 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 tty_struct *tty, struct usb_serial_port *port, |
| unsigned char data) |
| { |
| struct urb *urb = port->read_urb; |
| if (urb->actual_length) |
| tty_insert_flip_char(tty, data, TTY_NORMAL); |
| } |
| |
| 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; |
| goto exit; |
| } |
| |
| if (!serial) { |
| dbg("%s - bad serial pointer, exiting\n", __func__); |
| goto exit; |
| } |
| if (qt_port->closePending == 1) { |
| /* Were closing , stop reading */ |
| dbg("%s - (qt_port->closepending == 1\n", __func__); |
| qt_port->ReadBulkStopped = 1; |
| goto exit; |
| } |
| |
| /* |
| * 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; |
| goto exit; |
| } |
| |
| if (urb->status) { |
| qt_port->ReadBulkStopped = 1; |
| |
| dbg("%s - nonzero read bulk status received: %d\n", |
| __func__, urb->status); |
| goto exit; |
| } |
| |
| 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"); |
| |
| if (tty) { |
| ProcessRxChar(tty, port, data[i]); |
| ProcessRxChar(tty, port, data[i + 1]); |
| } |
| i += 2; |
| break; |
| } |
| if (flag == 1) |
| continue; |
| } |
| |
| if (tty && urb->actual_length) |
| tty_insert_flip_char(tty, data[i], TTY_NORMAL); |
| |
| } |
| 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); |
| exit: |
| tty_kref_put(tty); |
| } |
| |
| /* |
| * 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); |
| for (--i; i >= 0; i--) { |
| port = serial->port[i]; |
| kfree(usb_get_serial_port_data(port)); |
| usb_set_serial_port_data(port, NULL); |
| } |
| 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); |
| } |
| |
| } |
| |
| static int qt_open(struct tty_struct *tty, |
| struct usb_serial_port *port) |
| { |
| 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 defaults 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 usb_serial_port *port) |
| { |
| struct usb_serial *serial = port->serial; |
| struct quatech_port *qt_port; |
| struct quatech_port *port0; |
| struct tty_struct *tty; |
| int status; |
| unsigned int index; |
| status = 0; |
| |
| dbg("%s - port %d\n", __func__, port->number); |
| |
| tty = tty_port_tty_get(&port->port); |
| 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); |
| tty_kref_put(tty); |
| |
| /* 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_ONE_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"); |