#define QU2BOXPWRON 0x8000 /* magic number to turn FPGA power on */
#define QU2BOX232 0x40 /* RS232 mode on MEI devices */
#define QU2BOXSPD9600 0x60 /* set speed to 9600 baud */
+#define QT2_FIFO_DEPTH 1024 /* size of hardware fifos */
+#define QT2_TX_HEADER_LENGTH 5
+/* length of the header sent to the box with each write URB */
+
/* directions for USB transfers */
#define USBD_TRANSFER_DIRECTION_IN 0xc0
#define USBD_TRANSFER_DIRECTION_OUT 0x40
-/* special Quatech command IDs */
+
+/* special Quatech command IDs. These are pushed down the
+ USB control pipe to get the box on the end to do things */
#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 QT_STOP_RECEIVE 0xe0
-#define QT_FLUSH_DEVICE 0xc4*/
-#define QT_GET_SET_QMCR 0xe1
-/* port setting constants */
-#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 MAX_BAUD_RATE 921600
-#define 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 QT_SET_ATF 0xcd*/
+#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 QT2_BREAK_CONTROL 0xc8
+#define QT2_STOP_RECEIVE 0xe0
+#define QT2_FLUSH_DEVICE 0xc4
+#define QT2_GET_SET_QMCR 0xe1
+
+/* sorts of flush we can do on */
+#define QT2_FLUSH_RX 0x00
+#define QT2_FLUSH_TX 0x01
+
+/* 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 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 QT2_SERIAL_8_DATA 0x03
+#define QT2_SERIAL_7_DATA 0x02
+#define QT2_SERIAL_6_DATA 0x01
+#define QT2_SERIAL_5_DATA 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 QT2_MAX_BAUD_RATE 921600
+#define QT2_MAX_BAUD_REMAINDER 4608
+
+#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 */
+#define QT2_LSR_TEMT 0x40
+
+/* register numbers on each UART, for use with qt2_box_[get|set]_register*/
+#define QT2_XMT_HOLD_REGISTER 0x00
+#define QT2_XVR_BUFFER_REGISTER 0x00
+#define QT2_FIFO_CONTROL_REGISTER 0x02
+#define QT2_LINE_CONTROL_REGISTER 0x03
+#define QT2_MODEM_CONTROL_REGISTER 0x04
+#define QT2_LINE_STATUS_REGISTER 0x05
+#define QT2_MODEM_STATUS_REGISTER 0x06
+
+/* handy macros for doing escape sequence parsing on data reads */
+#define THISCHAR ((unsigned char *)(urb->transfer_buffer))[i]
+#define NEXTCHAR ((unsigned char *)(urb->transfer_buffer))[i + 1]
+#define THIRDCHAR ((unsigned char *)(urb->transfer_buffer))[i + 2]
+#define FOURTHCHAR ((unsigned char *)(urb->transfer_buffer))[i + 3]
+#define FIFTHCHAR ((unsigned char *)(urb->transfer_buffer))[i + 4]
static struct usb_device_id quausb2_id_table[] = {
{USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU2_100)},
MODULE_DEVICE_TABLE(usb, quausb2_id_table);
/* custom structures we need go here */
-
-
static struct usb_driver quausb2_usb_driver = {
.name = "quatech-usb2-serial",
.probe = usb_serial_probe,
.no_dynamic_id = 1,
};
-/* structure in which to keep all the messy stuff that this driver needs
- * alongside the usb_serial_port structure */
+/**
+ * quatech2_port: Structure in which to keep all the messy stuff that this
+ * driver needs alongside the usb_serial_port structure
+ * @read_urb_busy: Flag indicating that port->read_urb is in use
+ * @close_pending: flag indicating that this port is in the process of
+ * being closed (and so no new reads / writes should be started).
+ * @shadowLSR: Last received state of the line status register, holds the
+ * value of the line status flags from the port
+ * @shadowMSR: Last received state of the modem status register, holds
+ * the value of the modem status received from the port
+ * @rcv_flush: Flag indicating that a receive flush has occured on
+ * the hardware.
+ * @xmit_flush: Flag indicating that a transmit flush has been processed by
+ * the hardware.
+ * @tx_pending_bytes: Number of bytes waiting to be sent. This total
+ * includes the size (excluding header) of URBs that have been submitted but
+ * have not yet been sent to to the device, and bytes that have been sent out
+ * of the port but not yet reported sent by the "xmit_empty" messages (which
+ * indicate the number of bytes sent each time they are recieved, despite the
+ * misleading name).
+ * - Starts at zero when port is initialised.
+ * - is incremented by the size of the data to be written (no headers)
+ * each time a write urb is dispatched.
+ * - is decremented each time a "transmit empty" message is received
+ * by the driver in the data stream.
+ * @lock: Mutex to lock access to this structure when we need to ensure that
+ * races don't occur to access bits of it.
+ * @open_count: The number of uses of the port currently having
+ * it open, i.e. the reference count.
+ */
struct quatech2_port {
int magic;
+ bool read_urb_busy;
+ bool close_pending;
+ __u8 shadowLSR;
+ __u8 shadowMSR;
+ bool rcv_flush;
+ bool xmit_flush;
+ int tx_pending_bytes;
+ struct mutex modelock;
+ int open_count;
+
char active; /* someone has this device open */
unsigned char *xfer_to_tty_buffer;
wait_queue_head_t wait;
- int open_count; /* number of times this port has been opened */
- struct semaphore sem; /* locks this structure */
__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; /* ports open on whole device */
char RxHolding;
- char Rcv_Flush;
- char Xmit_Flush;
- char closePending;
- char fifo_empty_flag;
- int xmit_pending_bytes;
- int xmit_fifo_room_bytes;
struct semaphore pend_xmit_sem; /* locks this structure */
spinlock_t lock;
};
+/**
+ * Structure to hold device-wide internal status information
+ * @param ReadBulkStopped The last bulk read attempt ended in tears
+ * @param open_ports The number of serial ports currently in use on the box
+ * @param current_port Pointer to the serial port structure of the port which
+ * the read stream is currently directed to. Escape sequences in the read
+ * stream will change this around as data arrives from different ports on the
+ * box
+ * @buffer_size: The max size buffer each URB can take, used to set the size of
+ * the buffers allocated for writing to each port on the device (we need to
+ * store this because it is known only to the endpoint, but used each time a
+ * port is opened and a new buffer is allocated.
+ */
+struct quatech2_dev {
+ bool ReadBulkStopped;
+ char open_ports;
+ struct usb_serial_port *current_port;
+ int buffer_size;
+};
+
/* structure which holds line and modem status flags */
struct qt2_status_data {
__u8 line_status;
*port);
static inline void qt2_set_port_private(struct usb_serial_port *port,
struct quatech2_port *data);
+static inline struct quatech2_dev *qt2_get_dev_private(struct usb_serial
+ *serial);
+static inline void qt2_set_dev_private(struct usb_serial *serial,
+ struct quatech2_dev *data);
static int qt2_openboxchannel(struct usb_serial *serial, __u16
Uart_Number, struct qt2_status_data *pDeviceData);
static int qt2_closeboxchannel(struct usb_serial *serial, __u16
Uart_Number);
static int qt2_conf_uart(struct usb_serial *serial, unsigned short Uart_Number,
unsigned short divisor, unsigned char LCR);
+static void qt2_read_bulk_callback(struct urb *urb);
+static void qt2_write_bulk_callback(struct urb *urb);
+static void qt2_process_line_status(struct usb_serial_port *port,
+ unsigned char LineStatus);
+static void qt2_process_modem_status(struct usb_serial_port *port,
+ unsigned char ModemStatus);
+static void qt2_process_xmit_empty(struct usb_serial_port *port,
+ unsigned char fourth_char, unsigned char fifth_char);
+static void qt2_process_port_change(struct usb_serial_port *port,
+ unsigned char New_Current_Port);
+static void qt2_process_rcv_flush(struct usb_serial_port *port);
+static void qt2_process_xmit_flush(struct usb_serial_port *port);
+static void qt2_process_rx_char(struct usb_serial_port *port,
+ unsigned char data);
+static int qt2_box_get_register(struct usb_serial *serial,
+ unsigned char uart_number, unsigned short register_num,
+ __u8 *pValue);
+static int qt2_box_set_register(struct usb_serial *serial,
+ unsigned short Uart_Number, unsigned short Register_Num,
+ unsigned short Value);
+static int qt2_box_flush(struct usb_serial *serial, unsigned char uart_number,
+ unsigned short rcv_or_xmit);
+static int qt2_boxsetuart(struct usb_serial *serial, unsigned short Uart_Number,
+ unsigned short default_divisor, unsigned char default_LCR);
+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);
+static int qt2_boxstoprx(struct usb_serial *serial, unsigned short uart_number,
+ unsigned short stop);
+
/* implementation functions, roughly in order of use, are here */
static int qt2_calc_num_ports(struct usb_serial *serial)
{
static int qt2_attach(struct usb_serial *serial)
{
struct usb_serial_port *port;
- struct quatech2_port *qt2_port;
+ struct quatech2_port *qt2_port; /* port-specific private data pointer */
+ struct quatech2_dev *qt2_dev; /* dev-specific private data pointer */
int i;
- /* stuff for printing endpoint addresses, not needed for
- * production */
+ /* stuff for storing endpoint addresses now */
struct usb_endpoint_descriptor *endpoint;
struct usb_host_interface *iface_desc;
+ struct usb_serial_port *port0; /* first port structure on device */
/* check how many endpoints there are on the device, for
* sanity's sake */
return -ENODEV;
}
iface_desc = serial->interface->cur_altsetting;
+
+ /* Set up per-device private data, storing extra data alongside
+ * struct usb_serial */
+ qt2_dev = kzalloc(sizeof(*qt2_dev), GFP_KERNEL);
+ if (!qt2_dev) {
+ dbg("%s: kmalloc for quatech2_dev failed!",
+ __func__);
+ return -ENOMEM;
+ }
+ qt2_dev->open_ports = 0; /* no ports open */
+ qt2_set_dev_private(serial, qt2_dev); /* store private data */
+
+ /* Now setup per port private data, which replaces all the things
+ * that quatech added to standard kernel structures in their driver */
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ qt2_port = kzalloc(sizeof(*qt2_port), GFP_KERNEL);
+ if (!qt2_port) {
+ dbg("%s: kmalloc for quatech2_port (%d) failed!.",
+ __func__, i);
+ return -ENOMEM;
+ }
+ /* initialise stuff in the structure */
+ qt2_port->open_count = 0; /* port is not open */
+ spin_lock_init(&qt2_port->lock);
+ mutex_init(&qt2_port->modelock);
+ qt2_set_port_private(port, qt2_port);
+ }
+
+ /* gain access to port[0]'s structure because we want to store
+ * device-level stuff in it */
+ if (serial_paranoia_check(serial, __func__))
+ return -ENODEV;
+ port0 = serial->port[0]; /* get the first port's device structure */
+
/* print endpoint addresses so we can check them later
* by hand */
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
- {
+ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
-
if ((endpoint->bEndpointAddress & 0x80) &&
((endpoint->bmAttributes & 3) == 0x02)) {
/* we found a bulk in endpoint */
- dbg("found bulk in at 0x%x",
+ dbg("found bulk in at %#.2x",
endpoint->bEndpointAddress);
}
if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
- ((endpoint->bmAttributes & 3) == 0x02))
- {
+ ((endpoint->bmAttributes & 3) == 0x02)) {
/* we found a bulk out endpoint */
- dbg("found bulk out at 0x%x",
+ dbg("found bulk out at %#.2x",
endpoint->bEndpointAddress);
+ qt2_dev->buffer_size = endpoint->wMaxPacketSize;
+ /* max size of URB needs recording for the device */
}
} /* end printing endpoint addresses */
- /* Now setup per port private data, which replaces all the things
- * that quatech added to standard kernel structures in their driver */
- for (i = 0; i < serial->num_ports; i++) {
- port = serial->port[i];
- qt2_port = kzalloc(sizeof(*qt2_port), GFP_KERNEL);
- if (!qt2_port) {
- dbg("%s: kmalloc for quatech2_port (%d) failed!.",
- __func__, i);
- return -ENOMEM;
- }
- spin_lock_init(&qt2_port->lock);
- if (i == 0)
- qt2_port->open_ports = 0; /* no ports */
- else
- qt2_port->open_ports = -1; /* unused */
-
- usb_set_serial_port_data(port, qt2_port);
-
- }
/* switch on power to the hardware */
if (qt2_boxpoweron(serial) < 0) {
dbg("qt2_boxpoweron() failed");
port = serial->port[i];
qt2_port = qt2_get_port_private(port);
kfree(qt2_port);
- usb_set_serial_port_data(port, NULL);
+ qt2_set_port_private(port, NULL);
}
+ qt2_dev = qt2_get_dev_private(serial);
+ kfree(qt2_dev);
+ qt2_set_dev_private(serial, NULL);
dbg("Exit fail %s\n", __func__);
return -EIO;
usb_set_serial_port_data(port, NULL);
}
}
-/* This function is called once per serial port on the device.
+/* This function is called once per serial port on the device, when
+ * that port is opened by a userspace application.
* The tty_struct and the usb_serial_port belong to this port,
* i.e. there are multiple ones for a multi-port device.
* However the usb_serial_port structure has a back-pointer
* This is most helpful if the device shares resources (e.g. end
* points) between different ports
*/
-int qt2_open(struct tty_struct *tty,
- struct usb_serial_port *port, struct file *filp)
+int qt2_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct usb_serial *serial; /* device structure */
struct usb_serial_port *port0; /* first port structure on device */
- struct quatech2_port *port_extra; /* extra data for this port */
+ struct quatech2_port *port_extra; /* extra data for this port */
struct quatech2_port *port0_extra; /* extra data for first 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;
if (port_paranoia_check(port, __func__))
return -ENODEV;
- dbg("%s - port %d\n", __func__, port->number);
+ dbg("%s(): port %d", __func__, port->number);
serial = port->serial; /* get the parent device structure */
- if (serial_paranoia_check(serial, __func__))
+ if (serial_paranoia_check(serial, __func__)) {
+ dbg("usb_serial struct failed sanity check");
return -ENODEV;
+ }
+ dev_extra = qt2_get_dev_private(serial);
+ /* get the device private data */
+ if (dev_extra == NULL) {
+ dbg("device extra data pointer is null");
+ return -ENODEV;
+ }
port0 = serial->port[0]; /* get the first port's device structure */
+ if (port_paranoia_check(port0, __func__)) {
+ dbg("port0 usb_serial_port struct failed sanity check");
+ return -ENODEV;
+ }
port_extra = qt2_get_port_private(port);
port0_extra = qt2_get_port_private(port0);
-
- if (port_extra == NULL || port0_extra == NULL)
+ if (port_extra == NULL || port0_extra == NULL) {
+ dbg("failed to get private data for port or port0");
return -ENODEV;
-
- usb_clear_halt(serial->dev, port->write_urb->pipe);
- usb_clear_halt(serial->dev, port->read_urb->pipe);
- port0_extra->open_ports++;
+ }
/* FIXME: are these needed? Does it even do anything useful? */
/* get the modem and line status values from the UART */
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;
+/* port_extra->fifo_empty_flag = true;*/
dbg("qt2_openboxchannel on channel %d completed.",
port->number);
dbg("qt2_conf_uart() completed on channel %d",
port->number);
- dbg("port number is %d", port->number);
- dbg("serial number is %d", port->serial->minor);
-
- /* We need to set up endpoints here. We only
- * have one pair of endpoints per device, so in fact
- * we only need to set up endpoints on the first time
- * round, not subsequent ones.
- * When we do a write to a port, we will use the same endpoint
+ /*
+ * At this point we will need some end points to make further progress.
+ * Handlily, the correct endpoint addresses have been filled out into
+ * the usb_serial_port structure for us by the driver core, so we
+ * already have access to them.
+ * As there is only one bulk in and one bulk out end-point, these are in
+ * port[0]'s structure, and the rest are uninitialised. Handily,
+ * when we do a write to a port, we will use the same endpoint
* regardless of the port, with a 5-byte header added on to
- * tell the box which port it should eventually come out of,
- * so the same endpoint information needs to be visible to
- * write calls regardless of which port is being written.
- * To this end we actually keep the relevant endpoints
- * in port 0's structure, because that's always there
- * and avoids providing our own duplicate members in some
- * user data structure for the same purpose.
- * URBs will be allocated and freed dynamically as the are
- * used, so are not touched here.
+ * tell the box which port it should eventually come out of, so we only
+ * need the one set of endpoints. We will have one URB per port for
+ * writing, so that multiple ports can be writing at once.
+ * Finally we need a bulk in URB to use for background reads from the
+ * device, which will deal with uplink data from the box to host.
*/
- if (port0_extra->open_ports == 1) {
- /* this is first port to be opened */
+ dbg("port0 bulk in endpoint is %#.2x", port0->bulk_in_endpointAddress);
+ dbg("port0 bulk out endpoint is %#.2x",
+ port0->bulk_out_endpointAddress);
+
+ /* set up write_urb for bulk out transfers on this port. The USB
+ * serial framework will have allocated a blank URB, buffer etc for
+ * port0 when it put the endpoints there, but not for any of the other
+ * ports on the device because there are no more endpoints. Thus we
+ * have to allocate our own URBs for ports 1-7
+ */
+ if (port->write_urb == NULL) {
+ dbg("port->write_urb == NULL, allocating one");
+ port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!port->write_urb) {
+ err("Allocating write URB failed");
+ return -ENOMEM;
+ }
+ /* buffer same size as port0 */
+ port->bulk_out_size = dev_extra->buffer_size;
+ port->bulk_out_buffer = kmalloc(port->bulk_out_size,
+ GFP_KERNEL);
+ if (!port->bulk_out_buffer) {
+ err("Couldn't allocate bulk_out_buffer");
+ return -ENOMEM;
+ }
}
+ if (serial->dev == NULL)
+ dbg("serial->dev == NULL");
+ dbg("port->bulk_out_size is %d", port->bulk_out_size);
+
+ usb_fill_bulk_urb(port->write_urb, serial->dev,
+ usb_sndbulkpipe(serial->dev,
+ port0->bulk_out_endpointAddress),
+ port->bulk_out_buffer,
+ port->bulk_out_size,
+ qt2_write_bulk_callback,
+ port);
+ port_extra->tx_pending_bytes = 0;
+
+ if (dev_extra->open_ports == 0) {
+ /* this is first port to be opened, so need the read URB
+ * initialised for bulk in transfers (this is shared amongst
+ * all the ports on the device) */
+ usb_fill_bulk_urb(port0->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port0->bulk_in_endpointAddress),
+ port0->bulk_in_buffer,
+ port0->bulk_in_size,
+ qt2_read_bulk_callback, serial);
+ dbg("port0 bulk in URB intialised");
+
+ /* submit URB, i.e. start reading from device (async) */
+ dev_extra->ReadBulkStopped = false;
+ port_extra->read_urb_busy = true;
+ result = usb_submit_urb(port->read_urb, GFP_KERNEL);
+ if (result) {
+ dev_err(&port->dev,
+ "%s(): Error %d submitting bulk in urb",
+ __func__, result);
+ port_extra->read_urb_busy = false;
+ dev_extra->ReadBulkStopped = true;
+ }
- dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
- dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
- dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
+ /* When the first port is opened, initialise the value of
+ * current_port in dev_extra to this port, so it is set
+ * to something. Once the box sends data it will send the
+ * relevant escape sequences to get it to the right port anyway
+ */
+ dev_extra->current_port = port;
+ }
/* initialize our wait queues */
init_waitqueue_head(&port_extra->wait);
+ /* increment the count of openings of this port by one */
+ port_extra->open_count++;
- /* remember to store port_extra and port0 back again at end !*/
+ /* remember to store dev_extra, port_extra and port0_extra back again at
+ * end !*/
qt2_set_port_private(port, port_extra);
qt2_set_port_private(serial->port[0], port0_extra);
+ qt2_set_dev_private(serial, dev_extra);
+
+ dev_extra->open_ports++; /* one more port opened */
return 0;
}
+/* called when a port is closed by userspace. It won't be called, however,
+ * until calls to chars_in_buffer() reveal that the port has completed
+ * sending buffered data, and there is nothing else to do. Thus we don't have
+ * to rely on forcing data through in this function. */
+/* Setting close_pending should keep new data from being written out,
+ * once all the data in the enpoint buffers is moved out we won't get
+ * any more. */
+/* BoxStopReceive would keep any more data from coming from a given
+ * port, but isn't called by the vendor driver, although their comments
+ * mention it. Should it be used here to stop the inbound data
+ * flow?
+ */
+static void qt2_close(struct usb_serial_port *port)
+{
+ /* time out value for flush loops */
+ unsigned long jift;
+ struct quatech2_port *port_extra; /* extra data for this port */
+ struct usb_serial *serial; /* device structure */
+ struct quatech2_dev *dev_extra; /* extra data for the device */
+ __u8 lsr_value = 0; /* value of Line Status Register */
+ int status; /* result of last USB comms function */
+
+ dbg("%s(): port %d", __func__, port->number);
+ serial = port->serial; /* get the parent device structure */
+ dev_extra = qt2_get_dev_private(serial);
+ /* get the device private data */
+ port_extra = qt2_get_port_private(port); /* port private data */
+
+ /* we don't need to force flush though the hardware, so we skip using
+ * qt2_box_flush() here */
+
+ /* we can now (and only now) stop reading data */
+ port_extra->close_pending = true;
+ dbg("%s(): port_extra->close_pending = true", __func__);
+ /* although the USB side is now empty, the UART itself may
+ * still be pushing characters out over the line, so we have to
+ * wait testing the actual line status until the lines change
+ * indicating that the data is done transfering. */
+ /* FIXME: slow this polling down so it doesn't run the USB bus flat out
+ * if it actually has to spend any time in this loop (which it normally
+ * doesn't because the buffer is nearly empty) */
+ jift = jiffies + (10 * HZ); /* 10 sec timeout */
+ do {
+ status = qt2_box_get_register(serial, port->number,
+ QT2_LINE_STATUS_REGISTER, &lsr_value);
+ if (status < 0) {
+ dbg("%s(): qt2_box_get_register failed", __func__);
+ break;
+ }
+ if ((lsr_value & QT2_LSR_TEMT)) {
+ dbg("UART done sending");
+ break;
+ }
+ schedule();
+ } while (jiffies <= jift);
+
+ status = qt2_closeboxchannel(serial, port->number);
+ if (status < 0)
+ dbg("%s(): port %d qt2_box_open_close_channel failed",
+ __func__, port->number);
+ /* to avoid leaking URBs, we should now free the write_urb for this
+ * port and set the pointer to null so that next time the port is opened
+ * a new URB is allocated. This avoids leaking URBs when the device is
+ * removed */
+ usb_free_urb(port->write_urb);
+ kfree(port->bulk_out_buffer);
+ port->bulk_out_buffer = NULL;
+ port->bulk_out_size = 0;
+
+ /* decrement the count of openings of this port by one */
+ port_extra->open_count--;
+ /* one less overall open as well */
+ dev_extra->open_ports--;
+ dbg("%s(): Exit, dev_extra->open_ports = %d", __func__,
+ dev_extra->open_ports);
+}
+
+/**
+ * qt2_write - write bytes from the tty layer out to the USB device.
+ * @buf: The data to be written, size at least count.
+ * @count: The number of bytes requested for transmission.
+ * @return The number of bytes actually accepted for transmission to the device.
+ */
+static int qt2_write(struct tty_struct *tty, struct usb_serial_port *port,
+ const unsigned char *buf, int count)
+{
+ struct usb_serial *serial; /* parent device struct */
+ __u8 header_array[5]; /* header used to direct writes to the correct
+ port on the device */
+ struct quatech2_port *port_extra; /* extra data for this port */
+ int result;
+
+ serial = port->serial; /* get the parent device of the port */
+ port_extra = qt2_get_port_private(port); /* port extra info */
+ if (serial == NULL)
+ return -ENODEV;
+ dbg("%s(): port %d, requested to write %d bytes, %d already pending",
+ __func__, port->number, count, port_extra->tx_pending_bytes);
+
+ if (count <= 0) {
+ dbg("%s(): write request of <= 0 bytes", __func__);
+ return 0; /* no bytes written */
+ }
+
+ /* check if the write urb is already in use, i.e. data already being
+ * sent to this port */
+ if ((port->write_urb->status == -EINPROGRESS)) {
+ /* Fifo hasn't been emptied since last write to this port */
+ dbg("%s(): already writing, port->write_urb->status == "
+ "-EINPROGRESS", __func__);
+ /* schedule_work(&port->work); commented in vendor driver */
+ return 0;
+ } else if (port_extra->tx_pending_bytes >= QT2_FIFO_DEPTH) {
+ /* buffer is full (==). > should not occur, but would indicate
+ * that an overflow had occured */
+ dbg("%s(): port transmit buffer is full!", __func__);
+ /* schedule_work(&port->work); commented in vendor driver */
+ return 0;
+ }
+
+ /* We must fill the first 5 bytes of anything we sent with a transmit
+ * header which directes the data to the correct port. The maximum
+ * size we can send out in one URB is port->bulk_out_size, which caps
+ * the number of bytes of real data we can send in each write. As the
+ * semantics of write allow us to write less than we were give, we cap
+ * the maximum we will ever write to the device as 5 bytes less than
+ * one URB's worth, by reducing the value of the count argument
+ * appropriately*/
+ if (count > port->bulk_out_size - QT2_TX_HEADER_LENGTH) {
+ count = port->bulk_out_size - QT2_TX_HEADER_LENGTH;
+ dbg("%s(): write request bigger than urb, only accepting "
+ "%d bytes", __func__, count);
+ }
+ /* we must also ensure that the FIFO at the other end can cope with the
+ * URB we send it, otherwise it will have problems. As above, we can
+ * restrict the write size by just shrinking count.*/
+ if (count > (QT2_FIFO_DEPTH - port_extra->tx_pending_bytes)) {
+ count = QT2_FIFO_DEPTH - port_extra->tx_pending_bytes;
+ dbg("%s(): not enough room in buffer, only accepting %d bytes",
+ __func__, count);
+ }
+ /* now build the header for transmission */
+ header_array[0] = 0x1b;
+ header_array[1] = 0x1b;
+ header_array[2] = (__u8)port->number;
+ header_array[3] = (__u8)count;
+ header_array[4] = (__u8)count >> 8;
+ /* copy header into URB */
+ memcpy(port->write_urb->transfer_buffer, header_array,
+ QT2_TX_HEADER_LENGTH);
+ /* and actual data to write */
+ memcpy(port->write_urb->transfer_buffer + 5, buf, count);
+
+ dbg("%s(): first data byte to send = %#.2x", __func__, *buf);
+
+ /* 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 + 5,
+ (qt2_write_bulk_callback), port);
+ /* send the data out the bulk port */
+ result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+ if (result) {
+ /* error couldn't submit urb */
+ result = 0; /* return 0 as nothing got written */
+ dbg("%s(): failed submitting write urb, error %d",
+ __func__, result);
+ } else {
+ port_extra->tx_pending_bytes += count;
+ result = count; /* return number of bytes written, i.e. count */
+ dbg("%s(): submitted write urb, wrote %d bytes, "
+ "total pending bytes %d",
+ __func__, result, port_extra->tx_pending_bytes);
+ }
+ return result;
+}
+
+/* This is used by the next layer up to know how much space is available
+ * in the buffer on the device. It is used on a device closure to avoid
+ * calling close() until the buffer is reported to be empty.
+ * The returned value must never go down by more than the number of bytes
+ * written for correct behaviour further up the driver stack, i.e. if I call
+ * it, then write 6 bytes, then call again I should get 6 less, or possibly
+ * only 5 less if one was written in the meantime, etc. I should never get 7
+ * less (or any bigger number) because I only wrote 6 bytes.
+ */
+static int qt2_write_room(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ /* parent usb_serial_port pointer */
+ struct quatech2_port *port_extra; /* extra data for this port */
+ int room = 0;
+ port_extra = qt2_get_port_private(port);
+
+ if (port_extra->close_pending == true) {
+ dbg("%s(): port_extra->close_pending == true", __func__);
+ return -ENODEV;
+ }
+ /* Q: how many bytes would a write() call actually succeed in writing
+ * if it happened now?
+ * A: one QT2_FIFO_DEPTH, less the number of bytes waiting to be sent
+ * out of the port, unless this is more than the size of the
+ * write_urb output buffer less the header, which is the maximum
+ * size write we can do.
+
+ * Most of the implementation of this is done when writes to the device
+ * are started or terminate. When we send a write to the device, we
+ * reduce the free space count by the size of the dispatched write.
+ * When a "transmit empty" message comes back up the USB read stream,
+ * we decrement the count by the number of bytes reported sent, thus
+ * keeping track of the difference between sent and recieved bytes.
+ */
+
+ room = (QT2_FIFO_DEPTH - port_extra->tx_pending_bytes);
+ /* space in FIFO */
+ if (room > port->bulk_out_size - QT2_TX_HEADER_LENGTH)
+ room = port->bulk_out_size - QT2_TX_HEADER_LENGTH;
+ /* if more than the URB can hold, then cap to that limit */
+
+ dbg("%s(): port %d: write room is %d", __func__, port->number, room);
+ return room;
+}
+
+static int qt2_chars_in_buffer(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ /* parent usb_serial_port pointer */
+ struct quatech2_port *port_extra; /* extra data for this port */
+ port_extra = qt2_get_port_private(port);
+
+ dbg("%s(): port %d: chars_in_buffer = %d", __func__,
+ port->number, port_extra->tx_pending_bytes);
+ return port_extra->tx_pending_bytes;
+}
+
+/* called when userspace does an ioctl() on the device. Note that
+ * TIOCMGET and TIOCMSET are filtered off to their own methods before they get
+ * here, so we don't have to handle them.
+ */
+static int qt2_ioctl(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = port->serial;
+ __u8 mcr_value; /* Modem Control Register value */
+ __u8 msr_value; /* Modem Status Register value */
+ unsigned short prev_msr_value; /* Previous value of Modem Status
+ * Register used to implement waiting for a line status change to
+ * occur */
+ struct quatech2_port *port_extra; /* extra data for this port */
+ DECLARE_WAITQUEUE(wait, current);
+ /* Declare a wait queue named "wait" */
+
+ unsigned int value;
+ unsigned int UartNumber;
+
+ if (serial == NULL)
+ return -ENODEV;
+ UartNumber = tty->index - serial->minor;
+ port_extra = qt2_get_port_private(port);
+
+ dbg("%s(): port %d, UartNumber %d, tty =0x%p", __func__,
+ port->number, UartNumber, tty);
+
+ if (cmd == TIOCMBIS || cmd == TIOCMBIC) {
+ if (qt2_box_get_register(port->serial, UartNumber,
+ QT2_MODEM_CONTROL_REGISTER, &mcr_value) < 0)
+ return -ESPIPE;
+ if (copy_from_user(&value, (unsigned int *)arg,
+ sizeof(value)))
+ return -EFAULT;
+
+ switch (cmd) {
+ case TIOCMBIS:
+ if (value & TIOCM_RTS)
+ mcr_value |= QT2_SERIAL_MCR_RTS;
+ if (value & TIOCM_DTR)
+ mcr_value |= QT2_SERIAL_MCR_DTR;
+ if (value & TIOCM_LOOP)
+ mcr_value |= QT2_SERIAL_MCR_LOOP;
+ break;
+ case TIOCMBIC:
+ if (value & TIOCM_RTS)
+ mcr_value &= ~QT2_SERIAL_MCR_RTS;
+ if (value & TIOCM_DTR)
+ mcr_value &= ~QT2_SERIAL_MCR_DTR;
+ if (value & TIOCM_LOOP)
+ mcr_value &= ~QT2_SERIAL_MCR_LOOP;
+ break;
+ default:
+ break;
+ } /* end of local switch on cmd */
+ if (qt2_box_set_register(port->serial, UartNumber,
+ QT2_MODEM_CONTROL_REGISTER, mcr_value) < 0) {
+ return -ESPIPE;
+ } else {
+ port_extra->shadowMCR = mcr_value;
+ return 0;
+ }
+ } else if (cmd == TIOCMIWAIT) {
+ dbg("%s() port %d, cmd == TIOCMIWAIT enter",
+ __func__, port->number);
+ prev_msr_value = port_extra->shadowMSR & QT2_SERIAL_MSR_MASK;
+ while (1) {
+ add_wait_queue(&port_extra->wait, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule();
+ dbg("%s(): port %d, cmd == TIOCMIWAIT here\n",
+ __func__, port->number);
+ remove_wait_queue(&port_extra->wait, &wait);
+ /* see if a signal woke us up */
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ 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 & QT2_SERIAL_MSR_RI) ==
+ (msr_value & QT2_SERIAL_MSR_RI))) ||
+ (arg & TIOCM_DSR &&
+ ((prev_msr_value & QT2_SERIAL_MSR_DSR) ==
+ (msr_value & QT2_SERIAL_MSR_DSR))) ||
+ (arg & TIOCM_CD &&
+ ((prev_msr_value & QT2_SERIAL_MSR_CD) ==
+ (msr_value & QT2_SERIAL_MSR_CD))) ||
+ (arg & TIOCM_CTS &&
+ ((prev_msr_value & QT2_SERIAL_MSR_CTS) ==
+ (msr_value & QT2_SERIAL_MSR_CTS)))) {
+ return 0;
+ }
+ } /* end inifinite while */
+ /* FIXME: This while loop needs a way to break out if the device
+ * is disconnected while a process is waiting for the MSR to
+ * change, because once it's disconnected, it isn't going to
+ * change state ... */
+ } else {
+ /* any other ioctls we don't know about come here */
+ dbg("%s(): No ioctl for that one. port = %d", __func__,
+ port->number);
+ return -ENOIOCTLCMD;
+ }
+}
+
+/* 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 && !tty_termios_hw_change(old_termios, tty->termios))
+ 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;
+ }
+ /* Because LCR_change_to is initialised to zero, we don't have to worry
+ * about the case where PARENB is not set or clearing bits, because by
+ * default all of them are cleared, turning parity off.
+ * as we don't support mark/space parity, we should clear the
+ * mark/space parity bit in c_cflag, so the caller can tell we have
+ * ignored the request */
+ tty->termios->c_cflag &= ~CMSPAR;
+
+ 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, next we need to work out the divisor as the
+ * LCR and the divisor are set together */
+ 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 = %#.2x",
+ __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;
+ } else {
+ /* now encode the baud rate we actually set, which may be
+ * different to the request */
+ baud = QT2_MAX_BAUD_RATE / divisor;
+ tty_encode_baud_rate(tty, baud, baud);
+ }
+
+ /* 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;
+ struct usb_serial *serial = port->serial;
+
+ __u8 mcr_value; /* Modem Control Register value */
+ __u8 msr_value; /* Modem Status Register value */
+ unsigned int result = 0;
+ int status;
+ unsigned int UartNumber;
+
+ if (serial == NULL)
+ return -ENODEV;
+
+ dbg("%s(): port %d, tty =0x%p", __func__, port->number, tty);
+ UartNumber = tty->index - serial->minor;
+ dbg("UartNumber is %d", UartNumber);
+
+ status = qt2_box_get_register(port->serial, UartNumber,
+ QT2_MODEM_CONTROL_REGISTER, &mcr_value);
+ if (status >= 0) {
+ status = qt2_box_get_register(port->serial, UartNumber,
+ QT2_MODEM_STATUS_REGISTER, &msr_value);
+ }
+ if (status >= 0) {
+ result = ((mcr_value & QT2_SERIAL_MCR_DTR) ? TIOCM_DTR : 0)
+ /*DTR set */
+ | ((mcr_value & QT2_SERIAL_MCR_RTS) ? TIOCM_RTS : 0)
+ /*RTS set */
+ | ((msr_value & QT2_SERIAL_MSR_CTS) ? TIOCM_CTS : 0)
+ /* CTS set */
+ | ((msr_value & QT2_SERIAL_MSR_CD) ? TIOCM_CAR : 0)
+ /*Carrier detect set */
+ | ((msr_value & QT2_SERIAL_MSR_RI) ? TIOCM_RI : 0)
+ /* Ring indicator set */
+ | ((msr_value & QT2_SERIAL_MSR_DSR) ? TIOCM_DSR : 0);
+ /* DSR set */
+ return result;
+ } else {
+ return -ESPIPE;
+ }
+}
+
+static int qt2_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 = port->serial;
+ __u8 mcr_value; /* Modem Control Register value */
+ int status;
+ unsigned int UartNumber;
+
+ if (serial == NULL)
+ return -ENODEV;
+
+ UartNumber = tty->index - serial->minor;
+ dbg("%s(): port %d, UartNumber %d", __func__, port->number, UartNumber);
+
+ status = qt2_box_get_register(port->serial, UartNumber,
+ QT2_MODEM_CONTROL_REGISTER, &mcr_value);
+ if (status < 0)
+ return -ESPIPE;
+
+ /* Turn off RTS, DTR and loopback, then only turn on what was asked
+ * for */
+ mcr_value &= ~(QT2_SERIAL_MCR_RTS | QT2_SERIAL_MCR_DTR |
+ QT2_SERIAL_MCR_LOOP);
+ if (set & TIOCM_RTS)
+ mcr_value |= QT2_SERIAL_MCR_RTS;
+ if (set & TIOCM_DTR)
+ mcr_value |= QT2_SERIAL_MCR_DTR;
+ if (set & TIOCM_LOOP)
+ mcr_value |= QT2_SERIAL_MCR_LOOP;
+
+ status = qt2_box_set_register(port->serial, UartNumber,
+ QT2_MODEM_CONTROL_REGISTER, mcr_value);
+ if (status < 0)
+ return -ESPIPE;
+ else
+ return 0;
+}
+
+/** qt2_break - Turn BREAK on and off on the UARTs
+ */
+static void qt2_break(struct tty_struct *tty, int break_state)
+{
+ struct usb_serial_port *port = tty->driver_data; /* parent port */
+ struct usb_serial *serial = port->serial; /* parent device */
+ struct quatech2_port *port_extra; /* extra data for this port */
+ __u16 break_value;
+ unsigned int result;
+
+ port_extra = qt2_get_port_private(port);
+ if (!serial) {
+ dbg("%s(): port %d: no serial object", __func__, port->number);
+ return;
+ }
+
+ if (break_state == -1)
+ break_value = 1;
+ else
+ break_value = 0;
+ dbg("%s(): port %d, break_value %d", __func__, port->number,
+ break_value);
+
+ mutex_lock(&port_extra->modelock);
+ if (!port_extra->open_count) {
+ dbg("%s(): port not open", __func__);
+ goto exit;
+ }
+
+ result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT2_BREAK_CONTROL, 0x40, break_value,
+ port->number, NULL, 0, 300);
+exit:
+ mutex_unlock(&port_extra->modelock);
+ dbg("%s(): exit port %d", __func__, port->number);
+
+}
+/**
+ * qt2_throttle: - stop reading new data from the port
+ */
+static void qt2_throttle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = port->serial;
+ struct quatech2_port *port_extra; /* extra data for this port */
+ dbg("%s(): port %d", __func__, port->number);
+
+ port_extra = qt2_get_port_private(port);
+ if (!serial) {
+ dbg("%s(): enter port %d no serial object", __func__,
+ port->number);
+ return;
+ }
+
+ mutex_lock(&port_extra->modelock); /* lock structure */
+ if (!port_extra->open_count) {
+ dbg("%s(): port not open", __func__);
+ goto exit;
+ }
+ /* Send command to box to stop receiving stuff. This will stop this
+ * particular UART from filling the endpoint - in the multiport case the
+ * FPGA UART will handle any flow control implmented, but for the single
+ * port it's handed differently and we just quit submitting urbs
+ */
+ if (serial->dev->descriptor.idProduct != QUATECH_SSU2_100)
+ qt2_boxstoprx(serial, port->number, 1);
+
+ port->throttled = 1;
+exit:
+ mutex_unlock(&port_extra->modelock);
+ dbg("%s(): port %d: setting port->throttled", __func__, port->number);
+ return;
+}
+
+/**
+ * qt2_unthrottle: - start receiving data through the port again after being
+ * throttled
+ */
+static void qt2_unthrottle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = port->serial;
+ struct quatech2_port *port_extra; /* extra data for this port */
+ struct usb_serial_port *port0; /* first port structure on device */
+ struct quatech2_dev *dev_extra; /* extra data for the device */
+
+ if (!serial) {
+ dbg("%s() enter port %d no serial object!", __func__,
+ port->number);
+ return;
+ }
+ dbg("%s(): enter port %d", __func__, port->number);
+ dev_extra = qt2_get_dev_private(serial);
+ port_extra = qt2_get_port_private(port);
+ port0 = serial->port[0]; /* get the first port's device structure */
+
+ mutex_lock(&port_extra->modelock);
+ if (!port_extra->open_count) {
+ dbg("%s(): port %d not open", __func__, port->number);
+ goto exit;
+ }
+
+ if (port->throttled != 0) {
+ dbg("%s(): port %d: unsetting port->throttled", __func__,
+ port->number);
+ port->throttled = 0;
+ /* Send command to box to start receiving stuff */
+ if (serial->dev->descriptor.idProduct != QUATECH_SSU2_100) {
+ qt2_boxstoprx(serial, port->number, 0);
+ } else if (dev_extra->ReadBulkStopped == true) {
+ usb_fill_bulk_urb(port0->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port0->bulk_in_endpointAddress),
+ port0->bulk_in_buffer,
+ port0->bulk_in_size,
+ qt2_read_bulk_callback,
+ serial);
+ }
+ }
+exit:
+ mutex_unlock(&port_extra->modelock);
+ dbg("%s(): exit port %d", __func__, port->number);
+ return;
+}
+
/* internal, private helper functions for the driver */
/* Power up the FPGA in the box to get it working */
}
/*
- * qt2_boxsetQMCR Issue a QT_GET_SET_QMCR vendor-spcific request on the
+ * qt2_boxsetQMCR Issue a QT2_GET_SET_QMCR vendor-spcific request on the
* default control pipe. If successful return the number of bytes written,
* otherwise return a negative error number of the problem.
*/
Uart_Number, PortSettings);
result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
- QT_GET_SET_QMCR, 0x40, PortSettings,
+ QT2_GET_SET_QMCR, 0x40, PortSettings,
(__u16)Uart_Number, NULL, 0, 5000);
return result;
}
}
static inline void qt2_set_port_private(struct usb_serial_port *port,
- struct quatech2_port *data)
+ struct quatech2_port *data)
{
usb_set_serial_port_data(port, (void *)data);
}
+static inline struct quatech2_dev *qt2_get_dev_private(struct usb_serial
+ *serial)
+{
+ return (struct quatech2_dev *)usb_get_serial_data(serial);
+}
+static inline void qt2_set_dev_private(struct usb_serial *serial,
+ struct quatech2_dev *data)
+{
+ usb_set_serial_data(serial, (void *)data);
+}
+
static int qt2_openboxchannel(struct usb_serial *serial, __u16
Uart_Number, struct qt2_status_data *status)
{
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;
}
+/** @brief Callback for asynchronous submission of read URBs on bulk in
+ * endpoints
+ *
+ * Registered in qt2_open_port(), used to deal with incomming data
+ * from the box.
+ */
+static void qt2_read_bulk_callback(struct urb *urb)
+{
+ /* Get the device pointer (struct usb_serial) back out of the URB */
+ struct usb_serial *serial = urb->context;
+ /* get the extra struct for the device */
+ struct quatech2_dev *dev_extra = qt2_get_dev_private(serial);
+ /* Get first port structure from the device */
+ struct usb_serial_port *port0 = serial->port[0];
+ /* Get the currently active port structure from serial struct */
+ struct usb_serial_port *active = dev_extra->current_port;
+ /* get the extra struct for port 0 */
+ struct quatech2_port *port0_extra = qt2_get_port_private(port0);
+ /* and for the currently active port */
+ struct quatech2_port *active_extra = qt2_get_port_private(active);
+ /* When we finally get to doing some tty stuff, we will need this */
+ struct tty_struct *tty_st;
+ unsigned int RxCount; /* the length of the data to process */
+ unsigned int i; /* loop counter over the data to process */
+ int result; /* return value cache variable */
+ bool escapeflag; /* flag set to true if this loop iteration is
+ * parsing an escape sequence, rather than
+ * ordinary data */
+ dbg("%s(): callback running, active port is %d", __func__,
+ active->number);
+
+ if (urb->status) {
+ /* read didn't go well */
+ dev_extra->ReadBulkStopped = true;
+ dbg("%s(): nonzero bulk read status received: %d",
+ __func__, urb->status);
+ return;
+ }
+
+ /* inline port_sofrint() here */
+ if (port_paranoia_check(port0, __func__) != 0) {
+ dbg("%s - port_paranoia_check on port0 failed, exiting\n",
+__func__);
+ return;
+ }
+ if (port_paranoia_check(active, __func__) != 0) {
+ dbg("%s - port_paranoia_check on current_port "
+ "failed, exiting", __func__);
+ return;
+ }
+
+/* This single callback function has to do for all the ports on
+ * the device. Data being read up the USB can contain certain
+ * escape sequences which are used to communicate out-of-band
+ * information from the serial port in-band over the USB.
+ * These escapes include sending modem and flow control line
+ * status, and switching the port. The concept of a "Current Port"
+ * is used, which is where data is going until a port change
+ * escape seqence is received. This Current Port is kept between
+ * callbacks so that when this function enters we know which the
+ * currently active port is and can get to work right away without
+ * the box having to send repeat escape sequences (anyway, how
+ * would it know to do so?).
+ */
+
+ if (active_extra->close_pending == true) {
+ /* We are closing , stop reading */
+ dbg("%s - (active->close_pending == true", __func__);
+ if (dev_extra->open_ports <= 0) {
+ /* If this is the only port left open - stop the
+ * bulk read */
+ dev_extra->ReadBulkStopped = true;
+ dbg("%s - (ReadBulkStopped == true;", __func__);
+ 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 ((port0_extra->RxHolding == true) &&
+ (serial->dev->descriptor.idProduct == QUATECH_SSU2_100)) {
+ /* single port device, input is already stopped, so we don't
+ * need any more input data */
+ dev_extra->ReadBulkStopped = true;
+ return;
+ }
+ /* finally, we are in a situation where we might consider the data
+ * that is contained within the URB, and what to do about it.
+ * This is likely to involved communicating up to the TTY layer, so
+ * we will need to get hold of the tty for the port we are currently
+ * dealing with */
+
+ /* active is a usb_serial_port. It has a member port which is a
+ * tty_port. From this we get a tty_struct pointer which is what we
+ * actually wanted, and keep it on tty_st */
+ tty_st = tty_port_tty_get(&active->port);
+ if (!tty_st) {
+ dbg("%s - bad tty pointer - exiting", __func__);
+ return;
+ }
+ RxCount = urb->actual_length; /* grab length of data handy */
+
+ if (RxCount) {
+ /* skip all this if no data to process */
+ for (i = 0; i < RxCount ; ++i) {
+ /* Look ahead code here -works on several bytes at onc*/
+ if ((i <= (RxCount - 3)) && (THISCHAR == 0x1b)
+ && (NEXTCHAR == 0x1b)) {
+ /* we are in an escape sequence, type
+ * determined by the 3rd char */
+ escapeflag = false;
+ switch (THIRDCHAR) {
+ case 0x00:
+ /* Line status change 4th byte must
+ * follow */
+ if (i > (RxCount - 4)) {
+ dbg("Illegal escape sequences "
+ "in received data");
+ break;
+ }
+ qt2_process_line_status(active,
+ FOURTHCHAR);
+ i += 3;
+ escapeflag = true;
+ break;
+ case 0x01:
+ /* Modem status status change 4th byte
+ * must follow */
+ if (i > (RxCount - 4)) {
+ dbg("Illegal escape sequences "
+ "in received data");
+ break;
+ }
+ qt2_process_modem_status(active,
+ FOURTHCHAR);
+ i += 3;
+ escapeflag = true;
+ break;
+ case 0x02:
+ /* xmit hold empty 4th byte
+ * must follow */
+ if (i > (RxCount - 4)) {
+ dbg("Illegal escape sequences "
+ "in received data");
+ break;
+ }
+ qt2_process_xmit_empty(active,
+ FOURTHCHAR, FIFTHCHAR);
+ i += 4;
+ escapeflag = true;
+ break;
+ case 0x03:
+ /* Port number change 4th byte
+ * must follow */
+ if (i > (RxCount - 4)) {
+ dbg("Illegal escape sequences "
+ "in received data");
+ break;
+ }
+ /* Port change. If port open push
+ * current data up to tty layer */
+ if (active_extra->open_count > 0)
+ tty_flip_buffer_push(tty_st);
+
+ dbg("Port Change: new port = %d",
+ FOURTHCHAR);
+ qt2_process_port_change(active,
+ FOURTHCHAR);
+ i += 3;
+ escapeflag = true;
+ /* having changed port, the pointers for
+ * the currently active port are all out
+ * of date and need updating */
+ active = dev_extra->current_port;
+ active_extra =
+ qt2_get_port_private(active);
+ tty_st = tty_port_tty_get(
+ &active->port);
+ break;
+ case 0x04:
+ /* Recv flush 3rd byte must
+ * follow */
+ if (i > (RxCount - 3)) {
+ dbg("Illegal escape sequences "
+ "in received data");
+ break;
+ }
+ qt2_process_rcv_flush(active);
+ i += 2;
+ escapeflag = true;
+ break;
+ case 0x05:
+ /* xmit flush 3rd byte must follow */
+ if (i > (RxCount - 3)) {
+ dbg("Illegal escape sequences "
+ "in received data");
+ break;
+ }
+ qt2_process_xmit_flush(active);
+ i += 2;
+ escapeflag = true;
+ break;
+ case 0xff:
+ dbg("No status sequence");
+ qt2_process_rx_char(active, THISCHAR);
+ qt2_process_rx_char(active, NEXTCHAR);
+ i += 2;
+ break;
+ default:
+ qt2_process_rx_char(active, THISCHAR);
+ i += 1;
+ break;
+ } /*end switch*/
+ if (escapeflag == true)
+ continue;
+ /* if we did an escape char, we don't need
+ * to mess around pushing data through the
+ * tty layer, and can go round again */
+ } /*endif*/
+ if (tty_st && urb->actual_length) {
+ tty_buffer_request_room(tty_st, 1);
+ tty_insert_flip_string(tty_st,
+ &((unsigned char *)(urb->transfer_buffer)
+ )[i],
+ 1);
+ }
+ } /*endfor*/
+ tty_flip_buffer_push(tty_st);
+ } /*endif*/
+
+ /* at this point we have complete dealing with the data for this
+ * callback. All we have to do now is to start the async read process
+ * back off again. */
+
+ usb_fill_bulk_urb(port0->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev, port0->bulk_in_endpointAddress),
+ port0->bulk_in_buffer, port0->bulk_in_size,
+ qt2_read_bulk_callback, serial);
+ result = usb_submit_urb(port0->read_urb, GFP_ATOMIC);
+ if (result) {
+ dbg("%s(): failed resubmitting read urb, error %d",
+ __func__, result);
+ } else {
+ dbg("%s() successfully resubmitted read urb", __func__);
+ if (tty_st && RxCount) {
+ /* if some inbound data was processed, then
+ * we need to push that through the tty layer
+ */
+ tty_flip_buffer_push(tty_st);
+ tty_schedule_flip(tty_st);
+ }
+ }
+
+ /* cribbed from serqt_usb2 driver, but not sure which work needs
+ * scheduling - port0 or currently active port? */
+ /* schedule_work(&port->work); */
+ dbg("%s() completed", __func__);
+ return;
+}
+
+/** @brief Callback for asynchronous submission of write URBs on bulk in
+ * endpoints
+ *
+ * Registered in qt2_write(), used to deal with outgoing data
+ * to the box.
+ */
+static void qt2_write_bulk_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+ struct usb_serial *serial = port->serial;
+ dbg("%s(): port %d", __func__, port->number);
+ if (!serial) {
+ dbg("%s(): bad serial pointer, exiting", __func__);
+ return;
+ }
+ if (urb->status) {
+ dbg("%s(): nonzero write bulk status received: %d",
+ __func__, urb->status);
+ return;
+ }
+ /* FIXME What is supposed to be going on here?
+ * does this actually do anything useful, and should it?
+ */
+ /*port_softint((void *) serial); commented in vendor driver */
+ schedule_work(&port->work);
+ dbg("%s(): port %d exit", __func__, port->number);
+ return;
+}
+
+static void qt2_process_line_status(struct usb_serial_port *port,
+ unsigned char LineStatus)
+{
+ /* obtain the private structure for the port */
+ struct quatech2_port *port_extra = qt2_get_port_private(port);
+ 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)
+{
+ /* obtain the private structure for the port */
+ struct quatech2_port *port_extra = qt2_get_port_private(port);
+ port_extra->shadowMSR = ModemStatus;
+ wake_up_interruptible(&port_extra->wait);
+ /* this wakes up the otherwise indefinitely waiting code for
+ * the TIOCMIWAIT ioctl, so that it can notice that
+ * port_extra->shadowMSR has changed and the ioctl needs to return.
+ */
+}
+
+static void qt2_process_xmit_empty(struct usb_serial_port *port,
+ unsigned char fourth_char, unsigned char fifth_char)
+{
+ int byte_count;
+ /* obtain the private structure for the port */
+ struct quatech2_port *port_extra = qt2_get_port_private(port);
+
+ byte_count = (int)(fifth_char * 16);
+ byte_count += (int)fourth_char;
+ /* byte_count indicates how many bytes the device has written out. This
+ * message appears to occur regularly, and is used in the vendor driver
+ * to keep track of the fill state of the port transmit buffer */
+ port_extra->tx_pending_bytes -= byte_count;
+ /* reduce the stored data queue length by the known number of bytes
+ * sent */
+ dbg("port %d: %d bytes reported sent, %d still pending", port->number,
+ byte_count, port_extra->tx_pending_bytes);
+
+ /*port_extra->xmit_fifo_room_bytes = FIFO_DEPTH; ???*/
+}
+
+static void qt2_process_port_change(struct usb_serial_port *port,
+ unsigned char New_Current_Port)
+{
+ /* obtain the parent usb serial device structure */
+ struct usb_serial *serial = port->serial;
+ /* obtain the private structure for the device */
+ struct quatech2_dev *dev_extra = qt2_get_dev_private(serial);
+ dev_extra->current_port = serial->port[New_Current_Port];
+ /* what should I do with this? commented out in upstream
+ * driver */
+ /*schedule_work(&port->work);*/
+}
+
+static void qt2_process_rcv_flush(struct usb_serial_port *port)
+{
+ /* obtain the private structure for the port */
+ struct quatech2_port *port_extra = qt2_get_port_private(port);
+ port_extra->rcv_flush = true;
+}
+static void qt2_process_xmit_flush(struct usb_serial_port *port)
+{
+ /* obtain the private structure for the port */
+ struct quatech2_port *port_extra = qt2_get_port_private(port);
+ port_extra->xmit_flush = true;
+}
+
+static void qt2_process_rx_char(struct usb_serial_port *port,
+ unsigned char data)
+{
+ /* get the tty_struct for this port */
+ struct tty_struct *tty = tty_port_tty_get(&(port->port));
+ /* get the URB with the data in to push */
+ struct urb *urb = port->serial->port[0]->read_urb;
+
+ if (tty && urb->actual_length) {
+ tty_buffer_request_room(tty, 1);
+ tty_insert_flip_string(tty, &data, 1);
+ /* should this be commented out here? */
+ /*tty_flip_buffer_push(tty);*/
+ }
+}
+
+/** @brief Retreive the value of a register from the device
+ *
+ * Issues a GET_REGISTER vendor-spcific request over the USB control
+ * pipe to obtain a value back from a specific register on a specific
+ * UART
+ * @param serial Serial device handle to access the device through
+ * @param uart_number Which UART the value is wanted from
+ * @param register_num Which register to read the value from
+ * @param pValue Pointer to somewhere to put the retrieved value
+ */
+static int qt2_box_get_register(struct usb_serial *serial,
+ unsigned char uart_number, unsigned short register_num,
+ __u8 *pValue)
+{
+ int result;
+ result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ QT2_GET_SET_REGISTER, 0xC0, register_num,
+ uart_number, (void *)pValue, sizeof(*pValue), 300);
+ return result;
+}
+
+/** qt2_box_set_register
+ * Issue a SET_REGISTER vendor-specific request on the default control pipe
+ */
+static int qt2_box_set_register(struct usb_serial *serial,
+ unsigned short Uart_Number, unsigned short Register_Num,
+ unsigned short Value)
+{
+ int result;
+ unsigned short reg_and_byte;
+
+ reg_and_byte = Value;
+ reg_and_byte = reg_and_byte << 8;
+ reg_and_byte = reg_and_byte + Register_Num;
+
+ result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT2_GET_SET_REGISTER, 0x40, reg_and_byte,
+ Uart_Number, NULL, 0, 300);
+ return result;
+}
+
+
+/** @brief Request the Tx or Rx buffers on the USB side be flushed
+ *
+ * Tx flush: When all the currently buffered data has been sent, send an escape
+ * sequence back up the data stream to us
+ * Rx flush: add a flag in the data stream now so we know when it's made it's
+ * way up to us.
+ */
+static int qt2_box_flush(struct usb_serial *serial, unsigned char uart_number,
+ unsigned short rcv_or_xmit)
+{
+ int result;
+ result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ QT2_FLUSH_DEVICE, 0x40, rcv_or_xmit, uart_number, NULL, 0,
+ 300);
+ 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);
+}
+
+/**
+ * qt2_boxstoprx - Start and stop reception of data by the FPGA UART in
+ * response to requests from the tty layer
+ * @serial: pointer to the usb_serial structure for the parent device
+ * @uart_number: which UART on the device we are addressing
+ * @stop: Whether to start or stop data reception. Set to 1 to stop data being
+ * received, and to 0 to start it being received.
+ */
+static int qt2_boxstoprx(struct usb_serial *serial, unsigned short uart_number,
+ unsigned short stop)
+{
+ return usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ QT2_STOP_RECEIVE, 0x40, stop, uart_number, NULL, 0, 300);
+}
+
+
/*
* last things in file: stuff to register this driver into the generic
* USB serial framework.
.id_table = quausb2_id_table,
.num_ports = 8,
.open = qt2_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,*/
+ .close = qt2_close,
+ .write = qt2_write,
+ .write_room = qt2_write_room,
+ .chars_in_buffer = qt2_chars_in_buffer,
+ .throttle = qt2_throttle,
+ .unthrottle = qt2_unthrottle,
.calc_num_ports = qt2_calc_num_ports,
- /*.ioctl = qt_ioctl,
- .set_termios = qt_set_termios,
- .break_ctl = qt_break,
- .tiocmget = qt_tiocmget,
- .tiocmset = qt_tiocmset,*/
+ .ioctl = qt2_ioctl,
+ .set_termios = qt2_set_termios,
+ .break_ctl = qt2_break,
+ .tiocmget = qt2_tiocmget,
+ .tiocmset = qt2_tiocmset,
.attach = qt2_attach,
.release = qt2_release,
+ .read_bulk_callback = qt2_read_bulk_callback,
+ .write_bulk_callback = qt2_write_bulk_callback,
};
static int __init quausb2_usb_init(void)
return retval;
}
-
-
static void __exit quausb2_usb_exit(void)
{
usb_deregister(&quausb2_usb_driver);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff