summaryrefslogtreecommitdiffstats
path: root/drivers/media/usb/au0828/au0828-core.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/usb/au0828/au0828-core.c')
-rw-r--r--drivers/media/usb/au0828/au0828-core.c282
1 files changed, 282 insertions, 0 deletions
diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c
new file mode 100644
index 000000000000..745a80a798c8
--- /dev/null
+++ b/drivers/media/usb/au0828/au0828-core.c
@@ -0,0 +1,282 @@
+/*
+ * Driver for the Auvitek USB bridge
+ *
+ * Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <linux/mutex.h>
+
+#include "au0828.h"
+
+/*
+ * 1 = General debug messages
+ * 2 = USB handling
+ * 4 = I2C related
+ * 8 = Bridge related
+ */
+int au0828_debug;
+module_param_named(debug, au0828_debug, int, 0644);
+MODULE_PARM_DESC(debug, "enable debug messages");
+
+static unsigned int disable_usb_speed_check;
+module_param(disable_usb_speed_check, int, 0444);
+MODULE_PARM_DESC(disable_usb_speed_check,
+ "override min bandwidth requirement of 480M bps");
+
+#define _AU0828_BULKPIPE 0x03
+#define _BULKPIPESIZE 0xffff
+
+static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
+ u16 index);
+static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
+ u16 index, unsigned char *cp, u16 size);
+
+/* USB Direction */
+#define CMD_REQUEST_IN 0x00
+#define CMD_REQUEST_OUT 0x01
+
+u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
+{
+ u8 result = 0;
+
+ recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
+ dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
+
+ return result;
+}
+
+u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
+{
+ dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
+ return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
+}
+
+static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
+ u16 index)
+{
+ int status = -ENODEV;
+
+ if (dev->usbdev) {
+
+ /* cp must be memory that has been allocated by kmalloc */
+ status = usb_control_msg(dev->usbdev,
+ usb_sndctrlpipe(dev->usbdev, 0),
+ request,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE,
+ value, index, NULL, 0, 1000);
+
+ status = min(status, 0);
+
+ if (status < 0) {
+ printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
+ __func__, status);
+ }
+
+ }
+
+ return status;
+}
+
+static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
+ u16 index, unsigned char *cp, u16 size)
+{
+ int status = -ENODEV;
+ mutex_lock(&dev->mutex);
+ if (dev->usbdev) {
+ status = usb_control_msg(dev->usbdev,
+ usb_rcvctrlpipe(dev->usbdev, 0),
+ request,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ value, index,
+ dev->ctrlmsg, size, 1000);
+
+ status = min(status, 0);
+
+ if (status < 0) {
+ printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
+ __func__, status);
+ }
+
+ /* the host controller requires heap allocated memory, which
+ is why we didn't just pass "cp" into usb_control_msg */
+ memcpy(cp, dev->ctrlmsg, size);
+ }
+ mutex_unlock(&dev->mutex);
+ return status;
+}
+
+static void au0828_usb_disconnect(struct usb_interface *interface)
+{
+ struct au0828_dev *dev = usb_get_intfdata(interface);
+
+ dprintk(1, "%s()\n", __func__);
+
+ /* Digital TV */
+ au0828_dvb_unregister(dev);
+
+ if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
+ au0828_analog_unregister(dev);
+
+ /* I2C */
+ au0828_i2c_unregister(dev);
+
+ v4l2_device_unregister(&dev->v4l2_dev);
+
+ usb_set_intfdata(interface, NULL);
+
+ mutex_lock(&dev->mutex);
+ dev->usbdev = NULL;
+ mutex_unlock(&dev->mutex);
+
+ kfree(dev);
+
+}
+
+static int au0828_usb_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ int ifnum, retval;
+ struct au0828_dev *dev;
+ struct usb_device *usbdev = interface_to_usbdev(interface);
+
+ ifnum = interface->altsetting->desc.bInterfaceNumber;
+
+ if (ifnum != 0)
+ return -ENODEV;
+
+ dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
+ le16_to_cpu(usbdev->descriptor.idVendor),
+ le16_to_cpu(usbdev->descriptor.idProduct),
+ ifnum);
+
+ /*
+ * Make sure we have 480 Mbps of bandwidth, otherwise things like
+ * video stream wouldn't likely work, since 12 Mbps is generally
+ * not enough even for most Digital TV streams.
+ */
+ if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
+ printk(KERN_ERR "au0828: Device initialization failed.\n");
+ printk(KERN_ERR "au0828: Device must be connected to a "
+ "high-speed USB 2.0 port.\n");
+ return -ENODEV;
+ }
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev == NULL) {
+ printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
+ return -ENOMEM;
+ }
+
+ mutex_init(&dev->lock);
+ mutex_lock(&dev->lock);
+ mutex_init(&dev->mutex);
+ mutex_init(&dev->dvb.lock);
+ dev->usbdev = usbdev;
+ dev->boardnr = id->driver_info;
+
+ /* Create the v4l2_device */
+ retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
+ if (retval) {
+ printk(KERN_ERR "%s() v4l2_device_register failed\n",
+ __func__);
+ mutex_unlock(&dev->lock);
+ kfree(dev);
+ return -EIO;
+ }
+
+ /* Power Up the bridge */
+ au0828_write(dev, REG_600, 1 << 4);
+
+ /* Bring up the GPIO's and supporting devices */
+ au0828_gpio_setup(dev);
+
+ /* I2C */
+ au0828_i2c_register(dev);
+
+ /* Setup */
+ au0828_card_setup(dev);
+
+ /* Analog TV */
+ if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
+ au0828_analog_register(dev, interface);
+
+ /* Digital TV */
+ au0828_dvb_register(dev);
+
+ /* Store the pointer to the au0828_dev so it can be accessed in
+ au0828_usb_disconnect */
+ usb_set_intfdata(interface, dev);
+
+ printk(KERN_INFO "Registered device AU0828 [%s]\n",
+ dev->board.name == NULL ? "Unset" : dev->board.name);
+
+ mutex_unlock(&dev->lock);
+
+ return 0;
+}
+
+static struct usb_driver au0828_usb_driver = {
+ .name = DRIVER_NAME,
+ .probe = au0828_usb_probe,
+ .disconnect = au0828_usb_disconnect,
+ .id_table = au0828_usb_id_table,
+};
+
+static int __init au0828_init(void)
+{
+ int ret;
+
+ if (au0828_debug & 1)
+ printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
+
+ if (au0828_debug & 2)
+ printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
+
+ if (au0828_debug & 4)
+ printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
+
+ if (au0828_debug & 8)
+ printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
+ __func__);
+
+ printk(KERN_INFO "au0828 driver loaded\n");
+
+ ret = usb_register(&au0828_usb_driver);
+ if (ret)
+ printk(KERN_ERR "usb_register failed, error = %d\n", ret);
+
+ return ret;
+}
+
+static void __exit au0828_exit(void)
+{
+ usb_deregister(&au0828_usb_driver);
+}
+
+module_init(au0828_init);
+module_exit(au0828_exit);
+
+MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
+MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.0.2");
OpenPOWER on IntegriCloud