- 根目录:
- drivers
- media
- usb
- hdpvr
- hdpvr-core.c
/*
* Hauppauge HD PVR USB driver
*
* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2008 Janne Grunau (j@jannau.net)
* Copyright (C) 2008 John Poet
*
* 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, version 2.
*
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/atomic.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-common.h>
#include "hdpvr.h"
static int video_nr[HDPVR_MAX] = {[0 ... (HDPVR_MAX - 1)] = UNSET};
module_param_array(video_nr, int, NULL, 0);
MODULE_PARM_DESC(video_nr, "video device number (-1=Auto)");
/* holds the number of currently registered devices */
static atomic_t dev_nr = ATOMIC_INIT(-1);
int hdpvr_debug;
module_param(hdpvr_debug, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(hdpvr_debug, "enable debugging output");
static uint default_video_input = HDPVR_VIDEO_INPUTS;
module_param(default_video_input, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(default_video_input, "default video input: 0=Component / "
"1=S-Video / 2=Composite");
static uint default_audio_input = HDPVR_AUDIO_INPUTS;
module_param(default_audio_input, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(default_audio_input, "default audio input: 0=RCA back / "
"1=RCA front / 2=S/PDIF");
static bool boost_audio;
module_param(boost_audio, bool, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(boost_audio, "boost the audio signal");
/* table of devices that work with this driver */
static struct usb_device_id hdpvr_table[] = {
{ USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID) },
{ USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID1) },
{ USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID2) },
{ USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID3) },
{ USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID4) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, hdpvr_table);
void hdpvr_delete(struct hdpvr_device *dev)
{
hdpvr_free_buffers(dev);
if (dev->video_dev)
video_device_release(dev->video_dev);
usb_put_dev(dev->udev);
}
static void challenge(u8 *bytes)
{
u64 *i64P, tmp64;
uint i, idx;
for (idx = 0; idx < 32; ++idx) {
if (idx & 0x3)
bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3];
switch (idx & 0x3) {
case 0x3:
bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5];
bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9;
break;
case 0x1:
bytes[0] *= 8;
bytes[0] += 7*idx + 4;
bytes[6] += bytes[3] * 3;
break;
case 0x0:
bytes[3 - (idx >> 3)] = bytes[idx >> 2];
bytes[5] += bytes[6] * 3;
for (i = 0; i < 3; i++)
bytes[3] *= bytes[3] + 1;
break;
case 0x2:
for (i = 0; i < 3; i++)
bytes[1] *= bytes[6] + 1;
for (i = 0; i < 3; i++) {
i64P = (u64 *)bytes;
tmp64 = le64_to_cpup(i64P);
tmp64 <<= bytes[7] & 0x0f;
*i64P += cpu_to_le64(tmp64);
}
break;
}
}
}
/* try to init the device like the windows driver */
static int device_authorization(struct hdpvr_device *dev)
{
int ret, retval = -ENOMEM;
char request_type = 0x38, rcv_request = 0x81;
char *response;
#ifdef HDPVR_DEBUG
size_t buf_size = 46;
char *print_buf = kzalloc(5*buf_size+1, GFP_KERNEL);
if (!print_buf) {
v4l2_err(&dev->v4l2_dev, "Out of memory\n");
return retval;
}
#endif
mutex_lock(&dev->usbc_mutex);
ret = usb_control_msg(dev->udev,
usb_rcvctrlpipe(dev->udev, 0),
rcv_request, 0x80 | request_type,
0x0400, 0x0003,
dev->usbc_buf, 46,
10000);
if (ret != 46) {
v4l2_err(&dev->v4l2_dev,
"unexpected answer of status request, len %d\n", ret);
goto unlock;
}
#ifdef HDPVR_DEBUG
else {
hex_dump_to_buffer(dev->usbc_buf, 46, 16, 1, print_buf,
5*buf_size+1, 0);
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
"Status request returned, len %d: %s\n",
ret, print_buf);
}
#endif
dev->fw_ver = dev->usbc_buf[1];
v4l2_info(&dev->v4l2_dev, "firmware version 0x%x dated %s\n",
dev->fw_ver, &dev->usbc_buf[2]);
if (dev->fw_ver > 0x15) {
dev->options.brightness = 0x80;
dev->options.contrast = 0x40;
dev->options.hue = 0xf;
dev->options.saturation = 0x40;
dev->options.sharpness = 0x80;
}
switch (dev->fw_ver) {
case HDPVR_FIRMWARE_VERSION:
dev->flags &= ~HDPVR_FLAG_AC3_CAP;
break;
case HDPVR_FIRMWARE_VERSION_AC3:
case HDPVR_FIRMWARE_VERSION_0X12:
case HDPVR_FIRMWARE_VERSION_0X15:
case HDPVR_FIRMWARE_VERSION_0X1E:
dev->flags |= HDPVR_FLAG_AC3_CAP;
break;
default:
v4l2_info(&dev->v4l2_dev, "untested firmware, the driver might"
" not work.\n");
if (dev->fw_ver >= HDPVR_FIRMWARE_VERSION_AC3)
dev->flags |= HDPVR_FLAG_AC3_CAP;
else
dev->flags &= ~HDPVR_FLAG_AC3_CAP;
}
response = dev->usbc_buf+38;
#ifdef HDPVR_DEBUG
hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0);
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %s\n",
print_buf);
#endif
challenge(response);
#ifdef HDPVR_DEBUG
hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0);
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %s\n",
print_buf);
kfree(print_buf);
#endif
msleep(100);
ret = usb_control_msg(dev->udev,
usb_sndctrlpipe(dev->udev, 0),
0xd1, 0x00 | request_type,
0x0000, 0x0000,
response, 8,
10000);
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
"magic request returned %d\n", ret);
retval = ret != 8;
unlock:
mutex_unlock(&dev->usbc_mutex);
return retval;
}
static int hdpvr_device_init(struct hdpvr_device *dev)
{
int ret;
u8 *buf;
struct hdpvr_video_info *vidinf;
if (device_authorization(dev))
return -EACCES;
/* default options for init */
hdpvr_set_options(dev);
/* set filter options */
mutex_lock(&dev->usbc_mutex);
buf = dev->usbc_buf;
buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00;
ret = usb_control_msg(dev->udev,
usb_sndctrlpipe(dev->udev, 0),
0x01, 0x38,
CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX,
buf, 4,
1000);
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
"control request returned %d\n", ret);
mutex_unlock(&dev->usbc_mutex);
vidinf = get_video_info(dev);
if (!vidinf)
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
"no valid video signal or device init failed\n");
else
kfree(vidinf);
/* enable fan and bling leds */
mutex_lock(&dev->usbc_mutex);
buf[0] = 0x1;
ret = usb_control_msg(dev->udev,
usb_sndctrlpipe(dev->udev, 0),
0xd4, 0x38, 0, 0, buf, 1,
1000);
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
"control request returned %d\n", ret);
/* boost analog audio */
buf[0] = boost_audio;
ret = usb_control_msg(dev->udev,
usb_sndctrlpipe(dev->udev, 0),
0xd5, 0x38, 0, 0, buf, 1,
1000);
v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
"control request returned %d\n", ret);
mutex_unlock(&dev->usbc_mutex);
dev->status = STATUS_IDLE;
return 0;
}
static const struct hdpvr_options hdpvr_default_options = {
.video_std = HDPVR_60HZ,
.video_input = HDPVR_COMPONENT,
.audio_input = HDPVR_RCA_BACK,
.bitrate = 65, /* 6 mbps */
.peak_bitrate = 90, /* 9 mbps */
.bitrate_mode = HDPVR_CONSTANT,
.gop_mode = HDPVR_SIMPLE_IDR_GOP,
.audio_codec = V4L2_MPEG_AUDIO_ENCODING_AAC,
/* original picture controls for firmware version <= 0x15 */
/* updated in device_authorization() for newer firmware */
.brightness = 0x86,
.contrast = 0x80,
.hue = 0x80,
.saturation = 0x80,
.sharpness = 0x80,
};
static int hdpvr_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct hdpvr_device *dev;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
struct i2c_client *client;
size_t buffer_size;
int i;
int retval = -ENOMEM;
/* allocate memory for our device state and initialize it */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
dev_err(&interface->dev, "Out of memory\n");
goto error;
}
dev->workqueue = 0;
/* register v4l2_device early so it can be used for printks */
if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
dev_err(&interface->dev, "v4l2_device_register failed\n");
goto error;
}
mutex_init(&dev->io_mutex);
mutex_init(&dev->i2c_mutex);
mutex_init(&dev->usbc_mutex);
dev->usbc_buf = kmalloc(64, GFP_KERNEL);
if (!dev->usbc_buf) {
v4l2_err(&dev->v4l2_dev, "Out of memory\n");
goto error;
}
init_waitqueue_head(&dev->wait_buffer);
init_waitqueue_head(&dev->wait_data);
dev->workqueue = create_singlethread_workqueue("hdpvr_buffer");
if (!dev->workqueue)
goto error;
/* init video transfer queues */
INIT_LIST_HEAD(&dev->free_buff_list);
INIT_LIST_HEAD(&dev->rec_buff_list);
dev->options = hdpvr_default_options;
if (default_video_input < HDPVR_VIDEO_INPUTS)
dev->options.video_input = default_video_input;
if (default_audio_input < HDPVR_AUDIO_INPUTS) {
dev->options.audio_input = default_audio_input;
if (default_audio_input == HDPVR_SPDIF)
dev->options.audio_codec =
V4L2_MPEG_AUDIO_ENCODING_AC3;
}
dev->udev = usb_get_dev(interface_to_usbdev(interface));
/* set up the endpoint information */
/* use only the first bulk-in and bulk-out endpoints */
iface_desc = interface->cur_altsetting;
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (!dev->bulk_in_endpointAddr &&
usb_endpoint_is_bulk_in(endpoint)) {
/* USB interface description is buggy, reported max
* packet size is 512 bytes, windows driver uses 8192 */
buffer_size = 8192;
dev->bulk_in_size = buffer_size;
dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
}
}
if (!dev->bulk_in_endpointAddr) {
v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
goto error;
}
/* init the device */
if (hdpvr_device_init(dev)) {
v4l2_err(&dev->v4l2_dev, "device init failed\n");
goto error;
}
mutex_lock(&dev->io_mutex);
if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
mutex_unlock(&dev->io_mutex);
v4l2_err(&dev->v4l2_dev,
"allocating transfer buffers failed\n");
goto error;
}
mutex_unlock(&dev->io_mutex);
#if IS_ENABLED(CONFIG_I2C)
retval = hdpvr_register_i2c_adapter(dev);
if (retval < 0) {
v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n");
goto error;
}
client = hdpvr_register_ir_rx_i2c(dev);
if (!client) {
v4l2_err(&dev->v4l2_dev, "i2c IR RX device register failed\n");
retval = -ENODEV;
goto reg_fail;
}
client = hdpvr_register_ir_tx_i2c(dev);
if (!client) {
v4l2_err(&dev->v4l2_dev, "i2c IR TX device register failed\n");
retval = -ENODEV;
goto reg_fail;
}
#endif
retval = hdpvr_register_videodev(dev, &interface->dev,
video_nr[atomic_inc_return(&dev_nr)]);
if (retval < 0) {
v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
goto error;
}
/* let the user know what node this device is now attached to */
v4l2_info(&dev->v4l2_dev, "device now attached to %s\n",
video_device_node_name(dev->video_dev));
return 0;
reg_fail:
#if IS_ENABLED(CONFIG_I2C)
i2c_del_adapter(&dev->i2c_adapter);
#endif
error:
if (dev) {
/* Destroy single thread */
if (dev->workqueue)
destroy_workqueue(dev->workqueue);
/* this frees allocated memory */
hdpvr_delete(dev);
}
return retval;
}
static void hdpvr_disconnect(struct usb_interface *interface)
{
struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface));
v4l2_info(&dev->v4l2_dev, "device %s disconnected\n",
video_device_node_name(dev->video_dev));
/* prevent more I/O from starting and stop any ongoing */
mutex_lock(&dev->io_mutex);
dev->status = STATUS_DISCONNECTED;
wake_up_interruptible(&dev->wait_data);
wake_up_interruptible(&dev->wait_buffer);
mutex_unlock(&dev->io_mutex);
v4l2_device_disconnect(&dev->v4l2_dev);
msleep(100);
flush_workqueue(dev->workqueue);
mutex_lock(&dev->io_mutex);
hdpvr_cancel_queue(dev);
mutex_unlock(&dev->io_mutex);
#if IS_ENABLED(CONFIG_I2C)
i2c_del_adapter(&dev->i2c_adapter);
#endif
video_unregister_device(dev->video_dev);
atomic_dec(&dev_nr);
}
static struct usb_driver hdpvr_usb_driver = {
.name = "hdpvr",
.probe = hdpvr_probe,
.disconnect = hdpvr_disconnect,
.id_table = hdpvr_table,
};
module_usb_driver(hdpvr_usb_driver);
MODULE_LICENSE("GPL");
MODULE_VERSION("0.2.1");
MODULE_AUTHOR("Janne Grunau");
MODULE_DESCRIPTION("Hauppauge HD PVR driver");