d6a9a430a6
Add an au0828 module option that allows a user to override the USB speed check. Intended for advanced users who understand the consequences of trying to use the device with a 12Mbps bus. Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
293 lines
7.5 KiB
C
293 lines
7.5 KiB
C
/*
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* Driver for the Auvitek USB bridge
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*
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* Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <linux/mutex.h>
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#include "au0828.h"
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/*
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* 1 = General debug messages
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* 2 = USB handling
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* 4 = I2C related
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* 8 = Bridge related
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*/
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int au0828_debug;
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module_param_named(debug, au0828_debug, int, 0644);
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MODULE_PARM_DESC(debug, "enable debug messages");
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static unsigned int disable_usb_speed_check;
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module_param(disable_usb_speed_check, int, 0444);
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MODULE_PARM_DESC(disable_usb_speed_check,
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"override min bandwidth requirement of 480M bps");
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#define _AU0828_BULKPIPE 0x03
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#define _BULKPIPESIZE 0xffff
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static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index, unsigned char *cp, u16 size);
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static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index, unsigned char *cp, u16 size);
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/* USB Direction */
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#define CMD_REQUEST_IN 0x00
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#define CMD_REQUEST_OUT 0x01
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u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
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{
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recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1);
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dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, dev->ctrlmsg[0]);
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return dev->ctrlmsg[0];
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}
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u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
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{
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dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
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return send_control_msg(dev, CMD_REQUEST_OUT, val, reg,
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dev->ctrlmsg, 0);
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}
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static void cmd_msg_dump(struct au0828_dev *dev)
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{
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int i;
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for (i = 0; i < sizeof(dev->ctrlmsg); i += 16)
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dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x "
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"%02x %02x %02x %02x %02x %02x %02x %02x\n",
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__func__,
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dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
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dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
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dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
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dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
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dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
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dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
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dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
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dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
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}
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static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index, unsigned char *cp, u16 size)
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{
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int status = -ENODEV;
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mutex_lock(&dev->mutex);
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if (dev->usbdev) {
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/* cp must be memory that has been allocated by kmalloc */
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status = usb_control_msg(dev->usbdev,
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usb_sndctrlpipe(dev->usbdev, 0),
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request,
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USB_DIR_OUT | USB_TYPE_VENDOR |
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USB_RECIP_DEVICE,
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value, index,
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cp, size, 1000);
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status = min(status, 0);
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if (status < 0) {
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printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
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__func__, status);
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}
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}
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mutex_unlock(&dev->mutex);
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return status;
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}
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static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index, unsigned char *cp, u16 size)
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{
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int status = -ENODEV;
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mutex_lock(&dev->mutex);
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if (dev->usbdev) {
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memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
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/* cp must be memory that has been allocated by kmalloc */
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status = usb_control_msg(dev->usbdev,
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usb_rcvctrlpipe(dev->usbdev, 0),
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request,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, index,
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cp, size, 1000);
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status = min(status, 0);
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if (status < 0) {
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printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
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__func__, status);
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} else
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cmd_msg_dump(dev);
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}
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mutex_unlock(&dev->mutex);
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return status;
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}
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static void au0828_usb_disconnect(struct usb_interface *interface)
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{
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struct au0828_dev *dev = usb_get_intfdata(interface);
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dprintk(1, "%s()\n", __func__);
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/* Digital TV */
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au0828_dvb_unregister(dev);
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if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
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au0828_analog_unregister(dev);
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/* I2C */
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au0828_i2c_unregister(dev);
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v4l2_device_unregister(&dev->v4l2_dev);
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usb_set_intfdata(interface, NULL);
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mutex_lock(&dev->mutex);
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dev->usbdev = NULL;
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mutex_unlock(&dev->mutex);
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kfree(dev);
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}
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static int au0828_usb_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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int ifnum, retval;
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struct au0828_dev *dev;
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struct usb_device *usbdev = interface_to_usbdev(interface);
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ifnum = interface->altsetting->desc.bInterfaceNumber;
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if (ifnum != 0)
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return -ENODEV;
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dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
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le16_to_cpu(usbdev->descriptor.idVendor),
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le16_to_cpu(usbdev->descriptor.idProduct),
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ifnum);
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/*
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* Make sure we have 480 Mbps of bandwidth, otherwise things like
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* video stream wouldn't likely work, since 12 Mbps is generally
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* not enough even for most Digital TV streams.
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*/
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if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
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printk(KERN_ERR "au0828: Device initialization failed.\n");
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printk(KERN_ERR "au0828: Device must be connected to a "
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"high-speed USB 2.0 port.\n");
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return -ENODEV;
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}
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (dev == NULL) {
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printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
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return -ENOMEM;
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}
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mutex_init(&dev->mutex);
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mutex_init(&dev->dvb.lock);
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dev->usbdev = usbdev;
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dev->boardnr = id->driver_info;
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/* Create the v4l2_device */
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retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
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if (retval) {
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printk(KERN_ERR "%s() v4l2_device_register failed\n",
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__func__);
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kfree(dev);
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return -EIO;
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}
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/* Power Up the bridge */
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au0828_write(dev, REG_600, 1 << 4);
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/* Bring up the GPIO's and supporting devices */
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au0828_gpio_setup(dev);
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/* I2C */
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au0828_i2c_register(dev);
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/* Setup */
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au0828_card_setup(dev);
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/* Analog TV */
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if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
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au0828_analog_register(dev, interface);
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/* Digital TV */
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au0828_dvb_register(dev);
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/* Store the pointer to the au0828_dev so it can be accessed in
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au0828_usb_disconnect */
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usb_set_intfdata(interface, dev);
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printk(KERN_INFO "Registered device AU0828 [%s]\n",
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dev->board.name == NULL ? "Unset" : dev->board.name);
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return 0;
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}
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static struct usb_driver au0828_usb_driver = {
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.name = DRIVER_NAME,
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.probe = au0828_usb_probe,
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.disconnect = au0828_usb_disconnect,
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.id_table = au0828_usb_id_table,
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};
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static int __init au0828_init(void)
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{
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int ret;
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if (au0828_debug & 1)
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printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
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if (au0828_debug & 2)
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printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
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if (au0828_debug & 4)
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printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
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if (au0828_debug & 8)
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printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
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__func__);
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printk(KERN_INFO "au0828 driver loaded\n");
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ret = usb_register(&au0828_usb_driver);
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if (ret)
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printk(KERN_ERR "usb_register failed, error = %d\n", ret);
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return ret;
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}
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static void __exit au0828_exit(void)
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{
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usb_deregister(&au0828_usb_driver);
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}
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module_init(au0828_init);
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module_exit(au0828_exit);
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MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
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MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
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MODULE_LICENSE("GPL");
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