[media] si4713: Added the USB driver for Si4713
authorDinesh Ram <Dinesh.Ram@cern.ch>
Tue, 15 Oct 2013 15:24:42 +0000 (12:24 -0300)
committerMauro Carvalho Chehab <m.chehab@samsung.com>
Wed, 18 Dec 2013 08:37:57 +0000 (06:37 -0200)
This is the USB driver for the Silicon Labs development board.
It contains the Si4713 FM transmitter chip.

Signed-off-by: Dinesh Ram <dinesh.ram@cern.ch>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Eduardo Valentin <edubezval@gmail.com>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
drivers/media/radio/si4713/Kconfig
drivers/media/radio/si4713/Makefile
drivers/media/radio/si4713/radio-usb-si4713.c [new file with mode: 0644]

index ec640b86994b12adfa778318aa3b032b66af442f..a7c3ba85d12b8875086ba9f405e802a381249298 100644 (file)
@@ -1,3 +1,18 @@
+config USB_SI4713
+       tristate "Silicon Labs Si4713 FM Radio Transmitter support with USB"
+       depends on USB && RADIO_SI4713
+       select SI4713
+       ---help---
+         This is a driver for USB devices with the Silicon Labs SI4713
+         chip. Currently these devices are known to work.
+         - 10c4:8244: Silicon Labs FM Transmitter USB device.
+
+         Say Y here if you want to connect this type of radio to your
+         computer's USB port.
+
+         To compile this driver as a module, choose M here: the
+         module will be called radio-usb-si4713.
+
 config PLATFORM_SI4713
        tristate "Silicon Labs Si4713 FM Radio Transmitter support with I2C"
        depends on I2C && RADIO_SI4713
index a8c1194dac73f33dde8fb83a4d7d1358d1c945b2..ddaaf925e883dbc6fc2910ea9507967d7e73ab59 100644 (file)
@@ -3,4 +3,5 @@
 #
 
 obj-$(CONFIG_I2C_SI4713) += si4713.o
+obj-$(CONFIG_USB_SI4713) += radio-usb-si4713.o
 obj-$(CONFIG_PLATFORM_SI4713) += radio-platform-si4713.o
diff --git a/drivers/media/radio/si4713/radio-usb-si4713.c b/drivers/media/radio/si4713/radio-usb-si4713.c
new file mode 100644 (file)
index 0000000..d978844
--- /dev/null
@@ -0,0 +1,540 @@
+/*
+ * Copyright 2013 Cisco Systems, Inc. and/or its affiliates.
+ * All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/* kernel includes */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/mutex.h>
+#include <linux/i2c.h>
+/* V4l includes */
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
+#include <media/si4713.h>
+
+#include "si4713.h"
+
+/* driver and module definitions */
+MODULE_AUTHOR("Dinesh Ram <dinesh.ram@cern.ch>");
+MODULE_DESCRIPTION("Si4713 FM Transmitter USB driver");
+MODULE_LICENSE("GPL v2");
+
+/* The Device announces itself as Cygnal Integrated Products, Inc. */
+#define USB_SI4713_VENDOR              0x10c4
+#define USB_SI4713_PRODUCT             0x8244
+
+#define BUFFER_LENGTH                  64
+#define USB_TIMEOUT                    1000
+#define USB_RESP_TIMEOUT               50000
+
+/* USB Device ID List */
+static struct usb_device_id usb_si4713_usb_device_table[] = {
+       {USB_DEVICE_AND_INTERFACE_INFO(USB_SI4713_VENDOR, USB_SI4713_PRODUCT,
+                                                       USB_CLASS_HID, 0, 0) },
+       { }                                             /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, usb_si4713_usb_device_table);
+
+struct si4713_usb_device {
+       struct usb_device       *usbdev;
+       struct usb_interface    *intf;
+       struct video_device     vdev;
+       struct v4l2_device      v4l2_dev;
+       struct v4l2_subdev      *v4l2_subdev;
+       struct mutex            lock;
+       struct i2c_adapter      i2c_adapter;
+
+       u8                      *buffer;
+};
+
+static inline struct si4713_usb_device *to_si4713_dev(struct v4l2_device *v4l2_dev)
+{
+       return container_of(v4l2_dev, struct si4713_usb_device, v4l2_dev);
+}
+
+static int vidioc_querycap(struct file *file, void *priv,
+                                       struct v4l2_capability *v)
+{
+       struct si4713_usb_device *radio = video_drvdata(file);
+
+       strlcpy(v->driver, "radio-usb-si4713", sizeof(v->driver));
+       strlcpy(v->card, "Si4713 FM Transmitter", sizeof(v->card));
+       usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
+       v->device_caps = V4L2_CAP_MODULATOR | V4L2_CAP_RDS_OUTPUT;
+       v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+       return 0;
+}
+
+static int vidioc_g_modulator(struct file *file, void *priv,
+                               struct v4l2_modulator *vm)
+{
+       struct si4713_usb_device *radio = video_drvdata(file);
+
+       return v4l2_subdev_call(radio->v4l2_subdev, tuner, g_modulator, vm);
+}
+
+static int vidioc_s_modulator(struct file *file, void *priv,
+                               const struct v4l2_modulator *vm)
+{
+       struct si4713_usb_device *radio = video_drvdata(file);
+
+       return v4l2_subdev_call(radio->v4l2_subdev, tuner, s_modulator, vm);
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+                               const struct v4l2_frequency *vf)
+{
+       struct si4713_usb_device *radio = video_drvdata(file);
+
+       return v4l2_subdev_call(radio->v4l2_subdev, tuner, s_frequency, vf);
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+                               struct v4l2_frequency *vf)
+{
+       struct si4713_usb_device *radio = video_drvdata(file);
+
+       return v4l2_subdev_call(radio->v4l2_subdev, tuner, g_frequency, vf);
+}
+
+static const struct v4l2_ioctl_ops usb_si4713_ioctl_ops = {
+       .vidioc_querycap          = vidioc_querycap,
+       .vidioc_g_modulator       = vidioc_g_modulator,
+       .vidioc_s_modulator       = vidioc_s_modulator,
+       .vidioc_g_frequency       = vidioc_g_frequency,
+       .vidioc_s_frequency       = vidioc_s_frequency,
+       .vidioc_log_status        = v4l2_ctrl_log_status,
+       .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
+       .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/* File system interface */
+static const struct v4l2_file_operations usb_si4713_fops = {
+       .owner          = THIS_MODULE,
+       .open           = v4l2_fh_open,
+       .release        = v4l2_fh_release,
+       .poll           = v4l2_ctrl_poll,
+       .unlocked_ioctl = video_ioctl2,
+};
+
+static void usb_si4713_video_device_release(struct v4l2_device *v4l2_dev)
+{
+       struct si4713_usb_device *radio = to_si4713_dev(v4l2_dev);
+       struct i2c_adapter *adapter = &radio->i2c_adapter;
+
+       i2c_del_adapter(adapter);
+       v4l2_device_unregister(&radio->v4l2_dev);
+       kfree(radio->buffer);
+       kfree(radio);
+}
+
+/*
+ * This command sequence emulates the behaviour of the Windows driver.
+ * The structure of these commands was determined by sniffing the
+ * usb traffic of the device during startup.
+ * Most likely, these commands make some queries to the device.
+ * Commands are sent to enquire parameters like the bus mode,
+ * component revision, boot mode, the device serial number etc.
+ *
+ * These commands are necessary to be sent in this order during startup.
+ * The device fails to powerup if these commands are not sent.
+ *
+ * The complete list of startup commands is given in the start_seq table below.
+ */
+static int si4713_send_startup_command(struct si4713_usb_device *radio)
+{
+       unsigned long until_jiffies = jiffies + usecs_to_jiffies(USB_RESP_TIMEOUT) + 1;
+       u8 *buffer = radio->buffer;
+       int retval;
+
+       /* send the command */
+       retval = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0),
+                                       0x09, 0x21, 0x033f, 0, radio->buffer,
+                                       BUFFER_LENGTH, USB_TIMEOUT);
+       if (retval < 0)
+               return retval;
+
+       for (;;) {
+               /* receive the response */
+               retval = usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
+                               0x01, 0xa1, 0x033f, 0, radio->buffer,
+                               BUFFER_LENGTH, USB_TIMEOUT);
+               if (retval < 0)
+                       return retval;
+               if (!radio->buffer[1]) {
+                       /* USB traffic sniffing showed that some commands require
+                        * additional checks. */
+                       switch (buffer[1]) {
+                       case 0x32:
+                               if (radio->buffer[2] == 0)
+                                       return 0;
+                               break;
+                       case 0x14:
+                       case 0x12:
+                               if (radio->buffer[2] & SI4713_CTS)
+                                       return 0;
+                               break;
+                       case 0x06:
+                               if ((radio->buffer[2] & SI4713_CTS) && radio->buffer[9] == 0x08)
+                                       return 0;
+                               break;
+                       default:
+                               return 0;
+                       }
+               }
+               if (time_is_before_jiffies(until_jiffies))
+                       return -EIO;
+               msleep(3);
+       }
+
+       return retval;
+}
+
+struct si4713_start_seq_table {
+       int len;
+       u8 payload[8];
+};
+
+/*
+ * Some of the startup commands that could be recognized are :
+ * (0x03): Get serial number of the board (Response : CB000-00-00)
+ * (0x06, 0x03, 0x03, 0x08, 0x01, 0x0f) : Get Component revision
+ */
+struct si4713_start_seq_table start_seq[] = {
+
+       { 1, { 0x03 } },
+       { 2, { 0x32, 0x7f } },
+       { 6, { 0x06, 0x03, 0x03, 0x08, 0x01, 0x0f } },
+       { 2, { 0x14, 0x02 } },
+       { 2, { 0x09, 0x90 } },
+       { 3, { 0x08, 0x90, 0xfa } },
+       { 2, { 0x36, 0x01 } },
+       { 2, { 0x05, 0x03 } },
+       { 7, { 0x06, 0x00, 0x06, 0x0e, 0x01, 0x0f, 0x05 } },
+       { 1, { 0x12 } },
+       /* Commands that are sent after pressing the 'Initialize'
+               button in the windows application */
+       { 1, { 0x03 } },
+       { 1, { 0x01 } },
+       { 2, { 0x09, 0x90 } },
+       { 3, { 0x08, 0x90, 0xfa } },
+       { 1, { 0x34 } },
+       { 2, { 0x35, 0x01 } },
+       { 2, { 0x36, 0x01 } },
+       { 2, { 0x30, 0x09 } },
+       { 4, { 0x30, 0x06, 0x00, 0xe2 } },
+       { 3, { 0x31, 0x01, 0x30 } },
+       { 3, { 0x31, 0x04, 0x09 } },
+       { 2, { 0x05, 0x02 } },
+       { 6, { 0x06, 0x03, 0x03, 0x08, 0x01, 0x0f } },
+};
+
+static int si4713_start_seq(struct si4713_usb_device *radio)
+{
+       int retval = 0;
+       int i;
+
+       radio->buffer[0] = 0x3f;
+
+       for (i = 0; i < ARRAY_SIZE(start_seq); i++) {
+               int len = start_seq[i].len;
+               u8 *payload = start_seq[i].payload;
+
+               memcpy(radio->buffer + 1, payload, len);
+               memset(radio->buffer + len + 1, 0, BUFFER_LENGTH - 1 - len);
+               retval = si4713_send_startup_command(radio);
+       }
+
+       return retval;
+}
+
+static struct i2c_board_info si4713_board_info = {
+       I2C_BOARD_INFO("si4713", SI4713_I2C_ADDR_BUSEN_HIGH),
+};
+
+struct si4713_command_table {
+       int command_id;
+       u8 payload[8];
+};
+
+/*
+ * Structure of a command :
+ *     Byte 1 : 0x3f (always)
+ *     Byte 2 : 0x06 (send a command)
+ *     Byte 3 : Unknown
+ *     Byte 4 : Number of arguments + 1 (for the command byte)
+ *     Byte 5 : Number of response bytes
+ */
+struct si4713_command_table command_table[] = {
+
+       { SI4713_CMD_POWER_UP,          { 0x00, SI4713_PWUP_NARGS + 1, SI4713_PWUP_NRESP} },
+       { SI4713_CMD_GET_REV,           { 0x03, 0x01, SI4713_GETREV_NRESP } },
+       { SI4713_CMD_POWER_DOWN,        { 0x00, 0x01, SI4713_PWDN_NRESP} },
+       { SI4713_CMD_SET_PROPERTY,      { 0x00, SI4713_SET_PROP_NARGS + 1, SI4713_SET_PROP_NRESP } },
+       { SI4713_CMD_GET_PROPERTY,      { 0x00, SI4713_GET_PROP_NARGS + 1, SI4713_GET_PROP_NRESP } },
+       { SI4713_CMD_TX_TUNE_FREQ,      { 0x03, SI4713_TXFREQ_NARGS + 1, SI4713_TXFREQ_NRESP } },
+       { SI4713_CMD_TX_TUNE_POWER,     { 0x03, SI4713_TXPWR_NARGS + 1, SI4713_TXPWR_NRESP } },
+       { SI4713_CMD_TX_TUNE_MEASURE,   { 0x03, SI4713_TXMEA_NARGS + 1, SI4713_TXMEA_NRESP } },
+       { SI4713_CMD_TX_TUNE_STATUS,    { 0x00, SI4713_TXSTATUS_NARGS + 1, SI4713_TXSTATUS_NRESP } },
+       { SI4713_CMD_TX_ASQ_STATUS,     { 0x03, SI4713_ASQSTATUS_NARGS + 1, SI4713_ASQSTATUS_NRESP } },
+       { SI4713_CMD_GET_INT_STATUS,    { 0x03, 0x01, SI4713_GET_STATUS_NRESP } },
+       { SI4713_CMD_TX_RDS_BUFF,       { 0x03, SI4713_RDSBUFF_NARGS + 1, SI4713_RDSBUFF_NRESP } },
+       { SI4713_CMD_TX_RDS_PS,         { 0x00, SI4713_RDSPS_NARGS + 1, SI4713_RDSPS_NRESP } },
+};
+
+static int send_command(struct si4713_usb_device *radio, u8 *payload, char *data, int len)
+{
+       int retval;
+
+       radio->buffer[0] = 0x3f;
+       radio->buffer[1] = 0x06;
+
+       memcpy(radio->buffer + 2, payload, 3);
+       memcpy(radio->buffer + 5, data, len);
+       memset(radio->buffer + 5 + len, 0, BUFFER_LENGTH - 5 - len);
+
+       /* send the command */
+       retval = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0),
+                                       0x09, 0x21, 0x033f, 0, radio->buffer,
+                                       BUFFER_LENGTH, USB_TIMEOUT);
+
+       return retval < 0 ? retval : 0;
+}
+
+static int si4713_i2c_read(struct si4713_usb_device *radio, char *data, int len)
+{
+       unsigned long until_jiffies = jiffies + usecs_to_jiffies(USB_RESP_TIMEOUT) + 1;
+       int retval;
+
+       /* receive the response */
+       for (;;) {
+               retval = usb_control_msg(radio->usbdev,
+                                       usb_rcvctrlpipe(radio->usbdev, 0),
+                                       0x01, 0xa1, 0x033f, 0, radio->buffer,
+                                       BUFFER_LENGTH, USB_TIMEOUT);
+               if (retval < 0)
+                       return retval;
+
+               /*
+                * Check that we get a valid reply back (buffer[1] == 0) and
+                * that CTS is set before returning, otherwise we wait and try
+                * again. The i2c driver also does the CTS check, but the timeouts
+                * used there are much too small for this USB driver, so we wait
+                * for it here.
+                */
+               if (radio->buffer[1] == 0 && (radio->buffer[2] & SI4713_CTS)) {
+                       memcpy(data, radio->buffer + 2, len);
+                       return 0;
+               }
+               if (time_is_before_jiffies(until_jiffies)) {
+                       /* Zero the status value, ensuring CTS isn't set */
+                       data[0] = 0;
+                       return 0;
+               }
+               msleep(3);
+       }
+}
+
+static int si4713_i2c_write(struct si4713_usb_device *radio, char *data, int len)
+{
+       int retval = -EINVAL;
+       int i;
+
+       if (len > BUFFER_LENGTH - 5)
+               return -EINVAL;
+
+       for (i = 0; i < ARRAY_SIZE(command_table); i++) {
+               if (data[0] == command_table[i].command_id)
+                       retval = send_command(radio, command_table[i].payload,
+                                               data, len);
+       }
+
+       return retval < 0 ? retval : 0;
+}
+
+static int si4713_transfer(struct i2c_adapter *i2c_adapter,
+                               struct i2c_msg *msgs, int num)
+{
+       struct si4713_usb_device *radio = i2c_get_adapdata(i2c_adapter);
+       int retval = -EINVAL;
+       int i;
+
+       if (num <= 0)
+               return 0;
+
+       for (i = 0; i < num; i++) {
+               if (msgs[i].flags & I2C_M_RD)
+                       retval = si4713_i2c_read(radio, msgs[i].buf, msgs[i].len);
+               else
+                       retval = si4713_i2c_write(radio, msgs[i].buf, msgs[i].len);
+               if (retval)
+                       break;
+       }
+
+       return retval ? retval : num;
+}
+
+static u32 si4713_functionality(struct i2c_adapter *adapter)
+{
+       return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static struct i2c_algorithm si4713_algo = {
+       .master_xfer   = si4713_transfer,
+       .functionality = si4713_functionality,
+};
+
+/* This name value shows up in the sysfs filename associated
+               with this I2C adapter */
+static struct i2c_adapter si4713_i2c_adapter_template = {
+       .name   = "si4713-i2c",
+       .owner  = THIS_MODULE,
+       .algo   = &si4713_algo,
+};
+
+int si4713_register_i2c_adapter(struct si4713_usb_device *radio)
+{
+       radio->i2c_adapter = si4713_i2c_adapter_template;
+       /* set up sysfs linkage to our parent device */
+       radio->i2c_adapter.dev.parent = &radio->usbdev->dev;
+       i2c_set_adapdata(&radio->i2c_adapter, radio);
+
+       return i2c_add_adapter(&radio->i2c_adapter);
+}
+
+/* check if the device is present and register with v4l and usb if it is */
+static int usb_si4713_probe(struct usb_interface *intf,
+                               const struct usb_device_id *id)
+{
+       struct si4713_usb_device *radio;
+       struct i2c_adapter *adapter;
+       struct v4l2_subdev *sd;
+       int retval = -ENOMEM;
+
+       dev_info(&intf->dev, "Si4713 development board discovered: (%04X:%04X)\n",
+                       id->idVendor, id->idProduct);
+
+       /* Initialize local device structure */
+       radio = kzalloc(sizeof(struct si4713_usb_device), GFP_KERNEL);
+       if (radio)
+               radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
+
+       if (!radio || !radio->buffer) {
+               dev_err(&intf->dev, "kmalloc for si4713_usb_device failed\n");
+               kfree(radio);
+               return -ENOMEM;
+       }
+
+       mutex_init(&radio->lock);
+
+       radio->usbdev = interface_to_usbdev(intf);
+       radio->intf = intf;
+       usb_set_intfdata(intf, &radio->v4l2_dev);
+
+       retval = si4713_start_seq(radio);
+       if (retval < 0)
+               goto err_v4l2;
+
+       retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
+       if (retval < 0) {
+               dev_err(&intf->dev, "couldn't register v4l2_device\n");
+               goto err_v4l2;
+       }
+
+       retval = si4713_register_i2c_adapter(radio);
+       if (retval < 0) {
+               dev_err(&intf->dev, "could not register i2c device\n");
+               goto err_i2cdev;
+       }
+
+       adapter = &radio->i2c_adapter;
+       sd = v4l2_i2c_new_subdev_board(&radio->v4l2_dev, adapter,
+                                         &si4713_board_info, NULL);
+       radio->v4l2_subdev = sd;
+       if (!sd) {
+               dev_err(&intf->dev, "cannot get v4l2 subdevice\n");
+               retval = -ENODEV;
+               goto del_adapter;
+       }
+
+       radio->vdev.ctrl_handler = sd->ctrl_handler;
+       radio->v4l2_dev.release = usb_si4713_video_device_release;
+       strlcpy(radio->vdev.name, radio->v4l2_dev.name,
+               sizeof(radio->vdev.name));
+       radio->vdev.v4l2_dev = &radio->v4l2_dev;
+       radio->vdev.fops = &usb_si4713_fops;
+       radio->vdev.ioctl_ops = &usb_si4713_ioctl_ops;
+       radio->vdev.lock = &radio->lock;
+       radio->vdev.release = video_device_release_empty;
+       radio->vdev.vfl_dir = VFL_DIR_TX;
+
+       video_set_drvdata(&radio->vdev, radio);
+       set_bit(V4L2_FL_USE_FH_PRIO, &radio->vdev.flags);
+
+       retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO, -1);
+       if (retval < 0) {
+               dev_err(&intf->dev, "could not register video device\n");
+               goto del_adapter;
+       }
+
+       dev_info(&intf->dev, "V4L2 device registered as %s\n",
+                       video_device_node_name(&radio->vdev));
+
+       return 0;
+
+del_adapter:
+       i2c_del_adapter(adapter);
+err_i2cdev:
+       v4l2_device_unregister(&radio->v4l2_dev);
+err_v4l2:
+       kfree(radio->buffer);
+       kfree(radio);
+       return retval;
+}
+
+static void usb_si4713_disconnect(struct usb_interface *intf)
+{
+       struct si4713_usb_device *radio = to_si4713_dev(usb_get_intfdata(intf));
+
+       dev_info(&intf->dev, "Si4713 development board now disconnected\n");
+
+       mutex_lock(&radio->lock);
+       usb_set_intfdata(intf, NULL);
+       video_unregister_device(&radio->vdev);
+       v4l2_device_disconnect(&radio->v4l2_dev);
+       mutex_unlock(&radio->lock);
+       v4l2_device_put(&radio->v4l2_dev);
+}
+
+/* USB subsystem interface */
+static struct usb_driver usb_si4713_driver = {
+       .name                   = "radio-usb-si4713",
+       .probe                  = usb_si4713_probe,
+       .disconnect             = usb_si4713_disconnect,
+       .id_table               = usb_si4713_usb_device_table,
+};
+
+module_usb_driver(usb_si4713_driver);