forked from Minki/linux
9793e1d214
Call mutex_unlock and free dev on failure. Reported-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
759 lines
19 KiB
C
759 lines
19 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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#include "au0828.h"
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#include "au8522.h"
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#include <linux/module.h>
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#include <linux/slab.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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/* Due to enum tuner_pad_index */
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#include <media/tuner.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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* 16 = IR 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,
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"set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR");
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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);
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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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u8 result = 0;
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recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
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dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
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return result;
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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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}
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static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index)
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{
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int status = -ENODEV;
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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, NULL, 0, 1000);
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status = min(status, 0);
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if (status < 0) {
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pr_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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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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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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dev->ctrlmsg, size, 1000);
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status = min(status, 0);
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if (status < 0) {
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pr_err("%s() Failed receiving control message, error %d.\n",
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__func__, status);
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}
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/* the host controller requires heap allocated memory, which
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is why we didn't just pass "cp" into usb_control_msg */
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memcpy(cp, dev->ctrlmsg, size);
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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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#ifdef CONFIG_MEDIA_CONTROLLER
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static void au0828_media_graph_notify(struct media_entity *new,
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void *notify_data);
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#endif
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static void au0828_unregister_media_device(struct au0828_dev *dev)
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{
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#ifdef CONFIG_MEDIA_CONTROLLER
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struct media_device *mdev = dev->media_dev;
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struct media_entity_notify *notify, *nextp;
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if (!mdev || !media_devnode_is_registered(mdev->devnode))
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return;
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/* Remove au0828 entity_notify callbacks */
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list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) {
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if (notify->notify != au0828_media_graph_notify)
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continue;
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media_device_unregister_entity_notify(mdev, notify);
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}
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/* clear enable_source, disable_source */
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mutex_lock(&mdev->graph_mutex);
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dev->media_dev->source_priv = NULL;
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dev->media_dev->enable_source = NULL;
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dev->media_dev->disable_source = NULL;
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mutex_unlock(&mdev->graph_mutex);
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media_device_unregister(dev->media_dev);
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media_device_cleanup(dev->media_dev);
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kfree(dev->media_dev);
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dev->media_dev = NULL;
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#endif
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}
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void au0828_usb_release(struct au0828_dev *dev)
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{
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au0828_unregister_media_device(dev);
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/* I2C */
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au0828_i2c_unregister(dev);
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kfree(dev);
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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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/* there is a small window after disconnect, before
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dev->usbdev is NULL, for poll (e.g: IR) try to access
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the device and fill the dmesg with error messages.
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Set the status so poll routines can check and avoid
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access after disconnect.
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*/
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set_bit(DEV_DISCONNECTED, &dev->dev_state);
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au0828_rc_unregister(dev);
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/* Digital TV */
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au0828_dvb_unregister(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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if (au0828_analog_unregister(dev)) {
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/*
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* No need to call au0828_usb_release() if V4L2 is enabled,
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* as this is already called via au0828_usb_v4l2_release()
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*/
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return;
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}
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au0828_usb_release(dev);
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}
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static int au0828_media_device_init(struct au0828_dev *dev,
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struct usb_device *udev)
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{
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#ifdef CONFIG_MEDIA_CONTROLLER
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struct media_device *mdev;
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mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
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if (!mdev)
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return -ENOMEM;
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/* check if media device is already initialized */
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if (!mdev->dev)
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media_device_usb_init(mdev, udev, udev->product);
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dev->media_dev = mdev;
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#endif
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return 0;
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}
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#ifdef CONFIG_MEDIA_CONTROLLER
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static void au0828_media_graph_notify(struct media_entity *new,
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void *notify_data)
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{
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struct au0828_dev *dev = (struct au0828_dev *) notify_data;
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int ret;
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struct media_entity *entity, *mixer = NULL, *decoder = NULL;
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if (!new) {
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/*
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* Called during au0828 probe time to connect
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* entites that were created prior to registering
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* the notify handler. Find mixer and decoder.
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*/
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media_device_for_each_entity(entity, dev->media_dev) {
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if (entity->function == MEDIA_ENT_F_AUDIO_MIXER)
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mixer = entity;
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else if (entity->function == MEDIA_ENT_F_ATV_DECODER)
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decoder = entity;
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}
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goto create_link;
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}
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switch (new->function) {
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case MEDIA_ENT_F_AUDIO_MIXER:
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mixer = new;
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if (dev->decoder)
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decoder = dev->decoder;
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break;
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case MEDIA_ENT_F_ATV_DECODER:
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/* In case, Mixer is added first, find mixer and create link */
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media_device_for_each_entity(entity, dev->media_dev) {
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if (entity->function == MEDIA_ENT_F_AUDIO_MIXER)
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mixer = entity;
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}
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decoder = new;
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break;
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default:
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break;
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}
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create_link:
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if (decoder && mixer) {
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ret = media_create_pad_link(decoder,
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DEMOD_PAD_AUDIO_OUT,
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mixer, 0,
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MEDIA_LNK_FL_ENABLED);
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if (ret)
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dev_err(&dev->usbdev->dev,
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"Mixer Pad Link Create Error: %d\n", ret);
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}
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}
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/* Callers should hold graph_mutex */
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static int au0828_enable_source(struct media_entity *entity,
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struct media_pipeline *pipe)
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{
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struct media_entity *source, *find_source;
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struct media_entity *sink;
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struct media_link *link, *found_link = NULL;
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int ret = 0;
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struct media_device *mdev = entity->graph_obj.mdev;
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struct au0828_dev *dev;
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if (!mdev)
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return -ENODEV;
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dev = mdev->source_priv;
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/*
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* For Audio and V4L2 entity, find the link to which decoder
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* is the sink. Look for an active link between decoder and
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* source (tuner/s-video/Composite), if one exists, nothing
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* to do. If not, look for any active links between source
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* and any other entity. If one exists, source is busy. If
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* source is free, setup link and start pipeline from source.
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* For DVB FE entity, the source for the link is the tuner.
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* Check if tuner is available and setup link and start
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* pipeline.
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*/
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if (entity->function == MEDIA_ENT_F_DTV_DEMOD) {
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sink = entity;
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find_source = dev->tuner;
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} else {
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/* Analog isn't configured or register failed */
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if (!dev->decoder) {
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ret = -ENODEV;
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goto end;
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}
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sink = dev->decoder;
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/*
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* Default input is tuner and default input_type
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* is AU0828_VMUX_TELEVISION.
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* FIXME:
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* There is a problem when s_input is called to
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* change the default input. s_input will try to
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* enable_source before attempting to change the
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* input on the device, and will end up enabling
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* default source which is tuner.
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*
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* Additional logic is necessary in au0828
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* to detect that the input has changed and
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* enable the right source.
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*/
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if (dev->input_type == AU0828_VMUX_TELEVISION)
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find_source = dev->tuner;
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else if (dev->input_type == AU0828_VMUX_SVIDEO ||
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dev->input_type == AU0828_VMUX_COMPOSITE)
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find_source = &dev->input_ent[dev->input_type];
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else {
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/* unknown input - let user select input */
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ret = 0;
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goto end;
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}
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}
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/* Is an active link between sink and source */
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if (dev->active_link) {
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/*
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* If DVB is using the tuner and calling entity is
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* audio/video, the following check will be false,
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* since sink is different. Result is Busy.
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*/
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if (dev->active_link->sink->entity == sink &&
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dev->active_link->source->entity == find_source) {
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/*
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* Either ALSA or Video own tuner. sink is
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* the same for both. Prevent Video stepping
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* on ALSA when ALSA owns the source.
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*/
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if (dev->active_link_owner != entity &&
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dev->active_link_owner->function ==
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MEDIA_ENT_F_AUDIO_CAPTURE) {
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pr_debug("ALSA has the tuner\n");
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ret = -EBUSY;
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goto end;
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}
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ret = 0;
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goto end;
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} else {
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ret = -EBUSY;
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goto end;
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}
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}
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list_for_each_entry(link, &sink->links, list) {
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/* Check sink, and source */
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if (link->sink->entity == sink &&
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link->source->entity == find_source) {
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found_link = link;
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break;
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}
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}
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if (!found_link) {
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ret = -ENODEV;
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goto end;
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}
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/* activate link between source and sink and start pipeline */
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source = found_link->source->entity;
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ret = __media_entity_setup_link(found_link, MEDIA_LNK_FL_ENABLED);
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if (ret) {
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pr_err("Activate tuner link %s->%s. Error %d\n",
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source->name, sink->name, ret);
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goto end;
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}
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ret = __media_pipeline_start(entity, pipe);
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if (ret) {
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pr_err("Start Pipeline: %s->%s Error %d\n",
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source->name, entity->name, ret);
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ret = __media_entity_setup_link(found_link, 0);
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pr_err("Deactivate link Error %d\n", ret);
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goto end;
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}
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/*
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* save active link and active link owner to avoid audio
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* deactivating video owned link from disable_source and
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* vice versa
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*/
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dev->active_link = found_link;
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dev->active_link_owner = entity;
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dev->active_source = source;
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dev->active_sink = sink;
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pr_debug("Enabled Source: %s->%s->%s Ret %d\n",
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dev->active_source->name, dev->active_sink->name,
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dev->active_link_owner->name, ret);
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end:
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pr_debug("au0828_enable_source() end %s %d %d\n",
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entity->name, entity->function, ret);
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return ret;
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}
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/* Callers should hold graph_mutex */
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static void au0828_disable_source(struct media_entity *entity)
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{
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int ret = 0;
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struct media_device *mdev = entity->graph_obj.mdev;
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struct au0828_dev *dev;
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if (!mdev)
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return;
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dev = mdev->source_priv;
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if (!dev->active_link)
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return;
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/* link is active - stop pipeline from source (tuner) */
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if (dev->active_link->sink->entity == dev->active_sink &&
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dev->active_link->source->entity == dev->active_source) {
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/*
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* prevent video from deactivating link when audio
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* has active pipeline
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*/
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if (dev->active_link_owner != entity)
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return;
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__media_pipeline_stop(entity);
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ret = __media_entity_setup_link(dev->active_link, 0);
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if (ret)
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pr_err("Deactivate link Error %d\n", ret);
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pr_debug("Disabled Source: %s->%s->%s Ret %d\n",
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dev->active_source->name, dev->active_sink->name,
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dev->active_link_owner->name, ret);
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dev->active_link = NULL;
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dev->active_link_owner = NULL;
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dev->active_source = NULL;
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dev->active_sink = NULL;
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}
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}
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#endif
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static int au0828_media_device_register(struct au0828_dev *dev,
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struct usb_device *udev)
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{
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#ifdef CONFIG_MEDIA_CONTROLLER
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int ret;
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struct media_entity *entity, *demod = NULL;
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struct media_link *link;
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if (!dev->media_dev)
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return 0;
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if (!media_devnode_is_registered(dev->media_dev->devnode)) {
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/* register media device */
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ret = media_device_register(dev->media_dev);
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if (ret) {
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dev_err(&udev->dev,
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"Media Device Register Error: %d\n", ret);
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return ret;
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}
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} else {
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/*
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* Call au0828_media_graph_notify() to connect
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* audio graph to our graph. In this case, audio
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* driver registered the device and there is no
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* entity_notify to be called when new entities
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* are added. Invoke it now.
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*/
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au0828_media_graph_notify(NULL, (void *) dev);
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}
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/*
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* Find tuner, decoder and demod.
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*
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* The tuner and decoder should be cached, as they'll be used by
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* au0828_enable_source.
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*
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* It also needs to disable the link between tuner and
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* decoder/demod, to avoid disable step when tuner is requested
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* by video or audio. Note that this step can't be done until dvb
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* graph is created during dvb register.
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*/
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media_device_for_each_entity(entity, dev->media_dev) {
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switch (entity->function) {
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case MEDIA_ENT_F_TUNER:
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dev->tuner = entity;
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break;
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case MEDIA_ENT_F_ATV_DECODER:
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dev->decoder = entity;
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break;
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case MEDIA_ENT_F_DTV_DEMOD:
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demod = entity;
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break;
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}
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}
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/* Disable link between tuner->demod and/or tuner->decoder */
|
|
if (dev->tuner) {
|
|
list_for_each_entry(link, &dev->tuner->links, list) {
|
|
if (demod && link->sink->entity == demod)
|
|
media_entity_setup_link(link, 0);
|
|
if (dev->decoder && link->sink->entity == dev->decoder)
|
|
media_entity_setup_link(link, 0);
|
|
}
|
|
}
|
|
|
|
/* register entity_notify callback */
|
|
dev->entity_notify.notify_data = (void *) dev;
|
|
dev->entity_notify.notify = (void *) au0828_media_graph_notify;
|
|
ret = media_device_register_entity_notify(dev->media_dev,
|
|
&dev->entity_notify);
|
|
if (ret) {
|
|
dev_err(&udev->dev,
|
|
"Media Device register entity_notify Error: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
/* set enable_source */
|
|
mutex_lock(&dev->media_dev->graph_mutex);
|
|
dev->media_dev->source_priv = (void *) dev;
|
|
dev->media_dev->enable_source = au0828_enable_source;
|
|
dev->media_dev->disable_source = au0828_disable_source;
|
|
mutex_unlock(&dev->media_dev->graph_mutex);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int au0828_usb_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
int ifnum;
|
|
int retval = 0;
|
|
|
|
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) {
|
|
pr_err("au0828: Device initialization failed.\n");
|
|
pr_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) {
|
|
pr_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;
|
|
dev->board = au0828_boards[dev->boardnr];
|
|
|
|
/* Initialize the media controller */
|
|
retval = au0828_media_device_init(dev, usbdev);
|
|
if (retval) {
|
|
pr_err("%s() au0828_media_device_init failed\n",
|
|
__func__);
|
|
mutex_unlock(&dev->lock);
|
|
kfree(dev);
|
|
return retval;
|
|
}
|
|
|
|
retval = au0828_v4l2_device_register(interface, dev);
|
|
if (retval) {
|
|
au0828_usb_v4l2_media_release(dev);
|
|
mutex_unlock(&dev->lock);
|
|
kfree(dev);
|
|
return retval;
|
|
}
|
|
|
|
/* 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 */
|
|
retval = au0828_analog_register(dev, interface);
|
|
if (retval) {
|
|
pr_err("%s() au0282_dev_register failed to register on V4L2\n",
|
|
__func__);
|
|
mutex_unlock(&dev->lock);
|
|
kfree(dev);
|
|
goto done;
|
|
}
|
|
|
|
/* Digital TV */
|
|
retval = au0828_dvb_register(dev);
|
|
if (retval)
|
|
pr_err("%s() au0282_dev_register failed\n",
|
|
__func__);
|
|
|
|
/* Remote controller */
|
|
au0828_rc_register(dev);
|
|
|
|
/*
|
|
* Store the pointer to the au0828_dev so it can be accessed in
|
|
* au0828_usb_disconnect
|
|
*/
|
|
usb_set_intfdata(interface, dev);
|
|
|
|
pr_info("Registered device AU0828 [%s]\n",
|
|
dev->board.name == NULL ? "Unset" : dev->board.name);
|
|
|
|
mutex_unlock(&dev->lock);
|
|
|
|
retval = au0828_media_device_register(dev, usbdev);
|
|
|
|
done:
|
|
if (retval < 0)
|
|
au0828_usb_disconnect(interface);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int au0828_suspend(struct usb_interface *interface,
|
|
pm_message_t message)
|
|
{
|
|
struct au0828_dev *dev = usb_get_intfdata(interface);
|
|
|
|
if (!dev)
|
|
return 0;
|
|
|
|
pr_info("Suspend\n");
|
|
|
|
au0828_rc_suspend(dev);
|
|
au0828_v4l2_suspend(dev);
|
|
au0828_dvb_suspend(dev);
|
|
|
|
/* FIXME: should suspend also ATV/DTV */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int au0828_resume(struct usb_interface *interface)
|
|
{
|
|
struct au0828_dev *dev = usb_get_intfdata(interface);
|
|
if (!dev)
|
|
return 0;
|
|
|
|
pr_info("Resume\n");
|
|
|
|
/* Power Up the bridge */
|
|
au0828_write(dev, REG_600, 1 << 4);
|
|
|
|
/* Bring up the GPIO's and supporting devices */
|
|
au0828_gpio_setup(dev);
|
|
|
|
au0828_rc_resume(dev);
|
|
au0828_v4l2_resume(dev);
|
|
au0828_dvb_resume(dev);
|
|
|
|
/* FIXME: should resume also ATV/DTV */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_driver au0828_usb_driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.probe = au0828_usb_probe,
|
|
.disconnect = au0828_usb_disconnect,
|
|
.id_table = au0828_usb_id_table,
|
|
.suspend = au0828_suspend,
|
|
.resume = au0828_resume,
|
|
.reset_resume = au0828_resume,
|
|
};
|
|
|
|
static int __init au0828_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (au0828_debug & 1)
|
|
pr_info("%s() Debugging is enabled\n", __func__);
|
|
|
|
if (au0828_debug & 2)
|
|
pr_info("%s() USB Debugging is enabled\n", __func__);
|
|
|
|
if (au0828_debug & 4)
|
|
pr_info("%s() I2C Debugging is enabled\n", __func__);
|
|
|
|
if (au0828_debug & 8)
|
|
pr_info("%s() Bridge Debugging is enabled\n",
|
|
__func__);
|
|
|
|
if (au0828_debug & 16)
|
|
pr_info("%s() IR Debugging is enabled\n",
|
|
__func__);
|
|
|
|
pr_info("au0828 driver loaded\n");
|
|
|
|
ret = usb_register(&au0828_usb_driver);
|
|
if (ret)
|
|
pr_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("0.0.3");
|