a6c2ba2835
- Added support for em28xx board family Signed-off-by: Ludovico Cavedon <cavedon@sssup.it> Signed-off-by: Markus Rechberger <mrechberger@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1816 lines
44 KiB
C
1816 lines
44 KiB
C
/*
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em2820-video.c - driver for Empia EM2820/2840 USB video capture devices
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Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
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Ludovico Cavedon <cavedon@sssup.it>
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Mauro Carvalho Chehab <mchehab@brturbo.com.br>
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Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>
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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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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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GNU General Public License for more details.
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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/init.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/usb.h>
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#include <linux/videodev.h>
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#include <linux/i2c.h>
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#include <media/tuner.h>
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#include <linux/video_decoder.h>
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#include "em2820.h"
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#define DRIVER_AUTHOR "Markus Rechberger <mrechberger@gmail.com>, " \
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"Ludovico Cavedon <cavedon@sssup.it>, " \
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"Mauro Carvalho Chehab <mchehab@brturbo.com.br>"
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#define DRIVER_NAME "em2820"
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#define DRIVER_DESC "Empia em2820 based USB video device driver"
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#define EM2820_VERSION_CODE KERNEL_VERSION(0, 0, 1)
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#define em2820_videodbg(fmt, arg...) do {\
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if (video_debug) \
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printk(KERN_INFO "%s %s :"fmt, \
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dev->name, __FUNCTION__ , ##arg); } while (0)
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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static int tuner = -1;
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module_param(tuner, int, 0444);
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MODULE_PARM_DESC(tuner, "tuner type");
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static unsigned int video_debug = 0;
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module_param(video_debug,int,0644);
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MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
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/* supported tv norms */
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static struct em2820_tvnorm tvnorms[] = {
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{
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.name = "PAL",
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.id = V4L2_STD_PAL,
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.mode = VIDEO_MODE_PAL,
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}, {
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.name = "NTSC",
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.id = V4L2_STD_NTSC,
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.mode = VIDEO_MODE_NTSC,
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}, {
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.name = "SECAM",
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.id = V4L2_STD_SECAM,
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.mode = VIDEO_MODE_SECAM,
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}, {
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.name = "PAL-M",
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.id = V4L2_STD_PAL_M,
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.mode = VIDEO_MODE_PAL,
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}
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};
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#define TVNORMS ARRAY_SIZE(tvnorms)
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/* supported controls */
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static struct v4l2_queryctrl em2820_qctrl[] = {
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{
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.id = V4L2_CID_BRIGHTNESS,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Brightness",
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.minimum = -128,
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.maximum = 127,
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.step = 1,
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.default_value = 0,
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.flags = 0,
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},{
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.id = V4L2_CID_CONTRAST,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Contrast",
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.minimum = 0x0,
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.maximum = 0x1f,
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.step = 0x1,
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.default_value = 0x10,
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.flags = 0,
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},{
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.id = V4L2_CID_SATURATION,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Saturation",
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.minimum = 0x0,
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.maximum = 0x1f,
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.step = 0x1,
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.default_value = 0x10,
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.flags = 0,
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},{
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.id = V4L2_CID_AUDIO_VOLUME,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Volume",
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.minimum = 0x0,
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.maximum = 0x1f,
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.step = 0x1,
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.default_value = 0x1f,
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.flags = 0,
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},{
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.id = V4L2_CID_AUDIO_MUTE,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Mute",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 1,
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.flags = 0,
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},{
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.id = V4L2_CID_RED_BALANCE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Red chroma balance",
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.minimum = -128,
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.maximum = 127,
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.step = 1,
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.default_value = 0,
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.flags = 0,
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},{
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.id = V4L2_CID_BLUE_BALANCE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Blue chroma balance",
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.minimum = -128,
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.maximum = 127,
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.step = 1,
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.default_value = 0,
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.flags = 0,
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},{
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.id = V4L2_CID_GAMMA,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Gamma",
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.minimum = 0x0,
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.maximum = 0x3f,
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.step = 0x1,
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.default_value = 0x20,
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.flags = 0,
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}
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};
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static struct usb_driver em2820_usb_driver;
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static DECLARE_MUTEX(em2820_sysfs_lock);
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static DECLARE_RWSEM(em2820_disconnect);
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/********************* v4l2 interface ******************************************/
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static inline unsigned long kvirt_to_pa(unsigned long adr)
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{
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unsigned long kva, ret;
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kva = (unsigned long)page_address(vmalloc_to_page((void *)adr));
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kva |= adr & (PAGE_SIZE - 1);
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ret = __pa(kva);
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return ret;
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}
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/*
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* em2820_config()
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* inits registers with sane defaults
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*/
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static int em2820_config(struct em2820 *dev)
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{
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/* Sets I2C speed to 100 KHz */
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em2820_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
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/* enable vbi capturing */
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em2820_audio_usb_mute(dev, 1);
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dev->mute = 1; /* maybe not the right place... */
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dev->volume = 0x1f;
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em2820_audio_analog_set(dev);
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em2820_audio_analog_setup(dev);
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em2820_outfmt_set_yuv422(dev);
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em2820_colorlevels_set_default(dev);
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em2820_compression_disable(dev);
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return 0;
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}
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/*
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* em2820_config_i2c()
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* configure i2c attached devices
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*/
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void em2820_config_i2c(struct em2820 *dev)
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{
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struct v4l2_frequency f;
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struct video_decoder_init em2820_vdi = {.data = NULL };
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/* configure decoder */
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em2820_i2c_call_clients(dev, DECODER_INIT, &em2820_vdi);
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em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
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/* em2820_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
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/* em2820_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
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/* em2820_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
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/* em2820_i2c_call_clients(dev,DECODER_DUMP, NULL); */
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/* configure tuner */
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f.tuner = 0;
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f.type = V4L2_TUNER_ANALOG_TV;
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f.frequency = 9076; /* FIXME:remove magic number */
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dev->ctl_freq = f.frequency;
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em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
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/* configure tda9887 */
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em2820_i2c_call_clients(dev, TDA9887_SET_CONFIG, &dev->tda9887_conf);
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/* em2820_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
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}
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/*
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* em2820_empty_framequeues()
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* prepare queues for incoming and outgoing frames
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*/
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static void em2820_empty_framequeues(struct em2820 *dev)
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{
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u32 i;
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INIT_LIST_HEAD(&dev->inqueue);
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INIT_LIST_HEAD(&dev->outqueue);
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for (i = 0; i < EM2820_NUM_FRAMES; i++) {
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dev->frame[i].state = F_UNUSED;
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dev->frame[i].buf.bytesused = 0;
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}
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}
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/*
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* em2820_v4l2_open()
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* inits the device and starts isoc transfer
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*/
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static int em2820_v4l2_open(struct inode *inode, struct file *filp)
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{
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struct video_device *vdev = video_devdata(filp);
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int minor = iminor(inode);
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struct em2820 *dev = (struct em2820 *)video_get_drvdata(vdev);
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int errCode = 0;
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em2820_videodbg("users=%d", dev->users);
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if (!down_read_trylock(&em2820_disconnect))
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return -ERESTARTSYS;
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if (dev->users) {
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em2820_warn("this driver can be opened only once\n");
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up_read(&em2820_disconnect);
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return -EBUSY;
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}
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/* if(dev->vbi_dev->minor == minor){
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dev->type=V4L2_BUF_TYPE_VBI_CAPTURE;
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}*/
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if (dev->vdev->minor == minor) {
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dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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}
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init_MUTEX(&dev->fileop_lock); /* to 1 == available */
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spin_lock_init(&dev->queue_lock);
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init_waitqueue_head(&dev->wait_frame);
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init_waitqueue_head(&dev->wait_stream);
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down(&dev->lock);
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em2820_set_alternate(dev);
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dev->width = norm_maxw(dev);
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dev->height = norm_maxh(dev);
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dev->frame_size = dev->width * dev->height * 2;
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dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
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dev->bytesperline = dev->width * 2;
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dev->hscale = 0;
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dev->vscale = 0;
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em2820_capture_start(dev, 1);
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em2820_resolution_set(dev);
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/* start the transfer */
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errCode = em2820_init_isoc(dev);
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if (errCode)
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goto err;
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dev->users++;
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filp->private_data = dev;
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dev->io = IO_NONE;
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dev->stream = STREAM_OFF;
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dev->num_frames = 0;
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/* prepare queues */
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em2820_empty_framequeues(dev);
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dev->state |= DEV_INITIALIZED;
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err:
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up(&dev->lock);
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up_read(&em2820_disconnect);
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return errCode;
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}
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/*
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* em2820_realease_resources()
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* unregisters the v4l2,i2c and usb devices
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* called when the device gets disconected or at module unload
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*/
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static void em2820_release_resources(struct em2820 *dev)
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{
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down(&em2820_sysfs_lock);
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em2820_info("V4L2 device /dev/video%d deregistered\n",
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dev->vdev->minor);
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video_set_drvdata(dev->vdev, NULL);
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video_unregister_device(dev->vdev);
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/* video_unregister_device(dev->vbi_dev); */
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em2820_i2c_unregister(dev);
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usb_put_dev(dev->udev);
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up(&em2820_sysfs_lock);
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}
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/*
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* em2820_v4l2_close()
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* stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
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*/
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static int em2820_v4l2_close(struct inode *inode, struct file *file)
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{
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struct video_device *vdev = video_devdata(file);
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struct em2820 *dev = (struct em2820 *)video_get_drvdata(vdev);
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int errCode;
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em2820_videodbg("users=%d", dev->users);
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down(&dev->lock);
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em2820_uninit_isoc(dev);
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em2820_release_buffers(dev);
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/* the device is already disconnect, free the remaining resources */
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if (dev->state & DEV_DISCONNECTED) {
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em2820_release_resources(dev);
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up(&dev->lock);
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kfree(dev);
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return 0;
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}
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/* set alternate 0 */
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dev->alt = 0;
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em2820_videodbg("setting alternate 0");
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errCode = usb_set_interface(dev->udev, 0, 0);
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if (errCode < 0) {
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em2820_errdev ("cannot change alternate number to 0 (error=%i)\n",
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errCode);
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}
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dev->users--;
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wake_up_interruptible_nr(&dev->open, 1);
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up(&dev->lock);
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return 0;
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}
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/*
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* em2820_v4l2_read()
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* will allocate buffers when called for the first time
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*/
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static ssize_t
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em2820_v4l2_read(struct file *filp, char __user * buf, size_t count,
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loff_t * f_pos)
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{
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struct em2820 *dev = video_get_drvdata(video_devdata(filp));
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struct em2820_frame_t *f, *i;
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unsigned long lock_flags;
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int ret = 0;
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if (down_interruptible(&dev->fileop_lock))
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return -ERESTARTSYS;
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if (dev->state & DEV_DISCONNECTED) {
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em2820_videodbg("device not present");
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up(&dev->fileop_lock);
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return -ENODEV;
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}
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if (dev->state & DEV_MISCONFIGURED) {
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em2820_videodbg("device misconfigured; close and open it again");
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up(&dev->fileop_lock);
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return -EIO;
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}
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if (dev->io == IO_MMAP) {
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em2820_videodbg ("IO method is set to mmap; close and open"
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" the device again to choose the read method");
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up(&dev->fileop_lock);
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return -EINVAL;
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}
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if (dev->io == IO_NONE) {
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if (!em2820_request_buffers(dev, EM2820_NUM_READ_FRAMES)) {
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em2820_errdev("read failed, not enough memory\n");
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up(&dev->fileop_lock);
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return -ENOMEM;
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}
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dev->io = IO_READ;
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dev->stream = STREAM_ON;
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em2820_queue_unusedframes(dev);
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}
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if (!count) {
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up(&dev->fileop_lock);
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return 0;
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}
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if (list_empty(&dev->outqueue)) {
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if (filp->f_flags & O_NONBLOCK) {
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up(&dev->fileop_lock);
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return -EAGAIN;
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}
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ret = wait_event_interruptible
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(dev->wait_frame,
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(!list_empty(&dev->outqueue)) ||
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(dev->state & DEV_DISCONNECTED));
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if (ret) {
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up(&dev->fileop_lock);
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return ret;
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}
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if (dev->state & DEV_DISCONNECTED) {
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up(&dev->fileop_lock);
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return -ENODEV;
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}
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}
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f = list_entry(dev->outqueue.prev, struct em2820_frame_t, frame);
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spin_lock_irqsave(&dev->queue_lock, lock_flags);
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list_for_each_entry(i, &dev->outqueue, frame)
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i->state = F_UNUSED;
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INIT_LIST_HEAD(&dev->outqueue);
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spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
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em2820_queue_unusedframes(dev);
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if (count > f->buf.length)
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count = f->buf.length;
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if (copy_to_user(buf, f->bufmem, count)) {
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up(&dev->fileop_lock);
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return -EFAULT;
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}
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*f_pos += count;
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up(&dev->fileop_lock);
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return count;
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}
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/*
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* em2820_v4l2_poll()
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* will allocate buffers when called for the first time
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*/
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static unsigned int em2820_v4l2_poll(struct file *filp, poll_table * wait)
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{
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struct em2820 *dev = video_get_drvdata(video_devdata(filp));
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unsigned int mask = 0;
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if (down_interruptible(&dev->fileop_lock))
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return POLLERR;
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if (dev->state & DEV_DISCONNECTED) {
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em2820_videodbg("device not present");
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} else if (dev->state & DEV_MISCONFIGURED) {
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em2820_videodbg("device is misconfigured; close and open it again");
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} else {
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if (dev->io == IO_NONE) {
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if (!em2820_request_buffers
|
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(dev, EM2820_NUM_READ_FRAMES)) {
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em2820_warn
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("poll() failed, not enough memory\n");
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} else {
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dev->io = IO_READ;
|
|
dev->stream = STREAM_ON;
|
|
}
|
|
}
|
|
|
|
if (dev->io == IO_READ) {
|
|
em2820_queue_unusedframes(dev);
|
|
poll_wait(filp, &dev->wait_frame, wait);
|
|
|
|
if (!list_empty(&dev->outqueue))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
up(&dev->fileop_lock);
|
|
|
|
return mask;
|
|
}
|
|
}
|
|
|
|
up(&dev->fileop_lock);
|
|
return POLLERR;
|
|
}
|
|
|
|
/*
|
|
* em2820_vm_open()
|
|
*/
|
|
static void em2820_vm_open(struct vm_area_struct *vma)
|
|
{
|
|
struct em2820_frame_t *f = vma->vm_private_data;
|
|
f->vma_use_count++;
|
|
}
|
|
|
|
/*
|
|
* em2820_vm_close()
|
|
*/
|
|
static void em2820_vm_close(struct vm_area_struct *vma)
|
|
{
|
|
/* NOTE: buffers are not freed here */
|
|
struct em2820_frame_t *f = vma->vm_private_data;
|
|
f->vma_use_count--;
|
|
}
|
|
|
|
static struct vm_operations_struct em2820_vm_ops = {
|
|
.open = em2820_vm_open,
|
|
.close = em2820_vm_close,
|
|
};
|
|
|
|
/*
|
|
* em2820_v4l2_mmap()
|
|
*/
|
|
static int em2820_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
|
|
{
|
|
struct em2820 *dev = video_get_drvdata(video_devdata(filp));
|
|
unsigned long size = vma->vm_end - vma->vm_start,
|
|
start = vma->vm_start, pos, page;
|
|
u32 i;
|
|
if (down_interruptible(&dev->fileop_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (dev->state & DEV_DISCONNECTED) {
|
|
em2820_videodbg("mmap: device not present");
|
|
up(&dev->fileop_lock);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (dev->state & DEV_MISCONFIGURED) {
|
|
em2820_videodbg ("mmap: Device is misconfigured; close and "
|
|
"open it again");
|
|
up(&dev->fileop_lock);
|
|
return -EIO;
|
|
}
|
|
|
|
if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
|
|
size != PAGE_ALIGN(dev->frame[0].buf.length)) {
|
|
up(&dev->fileop_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < dev->num_frames; i++) {
|
|
if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
|
|
break;
|
|
}
|
|
if (i == dev->num_frames) {
|
|
em2820_videodbg("mmap: user supplied mapping address is out of range");
|
|
up(&dev->fileop_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* VM_IO is eventually going to replace PageReserved altogether */
|
|
vma->vm_flags |= VM_IO;
|
|
vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
|
|
|
|
pos = (unsigned long)dev->frame[i].bufmem;
|
|
while (size > 0) { /* size is page-aligned */
|
|
page = vmalloc_to_pfn((void *)pos);
|
|
if (remap_pfn_range(vma, start, page, PAGE_SIZE,
|
|
vma->vm_page_prot)) {
|
|
em2820_videodbg("mmap: rename page map failed");
|
|
up(&dev->fileop_lock);
|
|
return -EAGAIN;
|
|
}
|
|
start += PAGE_SIZE;
|
|
pos += PAGE_SIZE;
|
|
size -= PAGE_SIZE;
|
|
}
|
|
|
|
vma->vm_ops = &em2820_vm_ops;
|
|
vma->vm_private_data = &dev->frame[i];
|
|
|
|
em2820_vm_open(vma);
|
|
up(&dev->fileop_lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* em2820_get_ctrl()
|
|
* return the current saturation, brightness or contrast, mute state
|
|
*/
|
|
static int em2820_get_ctrl(struct em2820 *dev, struct v4l2_control *ctrl)
|
|
{
|
|
s32 tmp;
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
ctrl->value = dev->mute;
|
|
return 0;
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
ctrl->value = dev->volume;
|
|
return 0;
|
|
case V4L2_CID_BRIGHTNESS:
|
|
if ((tmp = em2820_brightness_get(dev)) < 0)
|
|
return -EIO;
|
|
ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
|
|
return 0;
|
|
case V4L2_CID_CONTRAST:
|
|
if ((ctrl->value = em2820_contrast_get(dev)) < 0)
|
|
return -EIO;
|
|
return 0;
|
|
case V4L2_CID_SATURATION:
|
|
if ((ctrl->value = em2820_saturation_get(dev)) < 0)
|
|
return -EIO;
|
|
return 0;
|
|
case V4L2_CID_RED_BALANCE:
|
|
if ((tmp = em2820_v_balance_get(dev)) < 0)
|
|
return -EIO;
|
|
ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
|
|
return 0;
|
|
case V4L2_CID_BLUE_BALANCE:
|
|
if ((tmp = em2820_u_balance_get(dev)) < 0)
|
|
return -EIO;
|
|
ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
|
|
return 0;
|
|
case V4L2_CID_GAMMA:
|
|
if ((ctrl->value = em2820_gamma_get(dev)) < 0)
|
|
return -EIO;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* em2820_set_ctrl()
|
|
* mute or set new saturation, brightness or contrast
|
|
*/
|
|
static int em2820_set_ctrl(struct em2820 *dev, const struct v4l2_control *ctrl)
|
|
{
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
if (ctrl->value != dev->mute) {
|
|
dev->mute = ctrl->value;
|
|
em2820_audio_usb_mute(dev, ctrl->value);
|
|
return em2820_audio_analog_set(dev);
|
|
}
|
|
return 0;
|
|
case V4L2_CID_AUDIO_VOLUME:
|
|
dev->volume = ctrl->value;
|
|
return em2820_audio_analog_set(dev);
|
|
case V4L2_CID_BRIGHTNESS:
|
|
return em2820_brightness_set(dev, ctrl->value);
|
|
case V4L2_CID_CONTRAST:
|
|
return em2820_contrast_set(dev, ctrl->value);
|
|
case V4L2_CID_SATURATION:
|
|
return em2820_saturation_set(dev, ctrl->value);
|
|
case V4L2_CID_RED_BALANCE:
|
|
return em2820_v_balance_set(dev, ctrl->value);
|
|
case V4L2_CID_BLUE_BALANCE:
|
|
return em2820_u_balance_set(dev, ctrl->value);
|
|
case V4L2_CID_GAMMA:
|
|
return em2820_gamma_set(dev, ctrl->value);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* em2820_stream_interrupt()
|
|
* stops streaming
|
|
*/
|
|
static int em2820_stream_interrupt(struct em2820 *dev)
|
|
{
|
|
int ret = 0;
|
|
|
|
/* stop reading from the device */
|
|
|
|
dev->stream = STREAM_INTERRUPT;
|
|
ret = wait_event_timeout(dev->wait_stream,
|
|
(dev->stream == STREAM_OFF) ||
|
|
(dev->state & DEV_DISCONNECTED),
|
|
EM2820_URB_TIMEOUT);
|
|
if (dev->state & DEV_DISCONNECTED)
|
|
return -ENODEV;
|
|
else if (ret) {
|
|
dev->state |= DEV_MISCONFIGURED;
|
|
em2820_videodbg("device is misconfigured; close and "
|
|
"open /dev/video%d again", dev->vdev->minor);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int em2820_set_norm(struct em2820 *dev, int width, int height)
|
|
{
|
|
unsigned int hscale, vscale;
|
|
unsigned int maxh, maxw;
|
|
|
|
maxw = norm_maxw(dev);
|
|
maxh = norm_maxh(dev);
|
|
|
|
/* width must even because of the YUYV format */
|
|
/* height must be even because of interlacing */
|
|
height &= 0xfffe;
|
|
width &= 0xfffe;
|
|
|
|
if (height < 32)
|
|
height = 32;
|
|
if (height > maxh)
|
|
height = maxh;
|
|
if (width < 48)
|
|
width = 48;
|
|
if (width > maxw)
|
|
width = maxw;
|
|
|
|
if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
|
|
hscale = 0x3fff;
|
|
width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
|
|
|
|
if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
|
|
vscale = 0x3fff;
|
|
height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
|
|
|
|
/* set new image size */
|
|
dev->width = width;
|
|
dev->height = height;
|
|
dev->frame_size = dev->width * dev->height * 2;
|
|
dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
|
|
dev->bytesperline = dev->width * 2;
|
|
dev->hscale = hscale;
|
|
dev->vscale = vscale;
|
|
|
|
em2820_resolution_set(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void video_mux(struct em2820 *dev, int index)
|
|
{
|
|
int input, ainput;
|
|
|
|
input = INPUT(index)->vmux;
|
|
dev->ctl_input = index;
|
|
|
|
em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
|
|
|
|
dev->ctl_ainput = INPUT(index)->amux;
|
|
|
|
switch (dev->ctl_ainput) {
|
|
case 0:
|
|
ainput = EM2820_AUDIO_SRC_TUNER;
|
|
break;
|
|
default:
|
|
ainput = EM2820_AUDIO_SRC_LINE;
|
|
}
|
|
|
|
em2820_audio_source(dev, ainput);
|
|
}
|
|
|
|
/*
|
|
* em2820_v4l2_do_ioctl()
|
|
* This function is _not_ called directly, but from
|
|
* em2820_v4l2_ioctl. Userspace
|
|
* copying is done already, arg is a kernel pointer.
|
|
*/
|
|
static int em2820_do_ioctl(struct inode *inode, struct file *filp,
|
|
struct em2820 *dev, unsigned int cmd, void *arg,
|
|
v4l2_kioctl driver_ioctl)
|
|
{
|
|
int ret;
|
|
|
|
switch (cmd) {
|
|
/* ---------- tv norms ---------- */
|
|
case VIDIOC_ENUMSTD:
|
|
{
|
|
struct v4l2_standard *e = arg;
|
|
unsigned int i;
|
|
|
|
i = e->index;
|
|
if (i >= TVNORMS)
|
|
return -EINVAL;
|
|
ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
|
|
tvnorms[e->index].name);
|
|
e->index = i;
|
|
if (ret < 0)
|
|
return ret;
|
|
return 0;
|
|
}
|
|
case VIDIOC_G_STD:
|
|
{
|
|
v4l2_std_id *id = arg;
|
|
|
|
*id = dev->tvnorm->id;
|
|
return 0;
|
|
}
|
|
case VIDIOC_S_STD:
|
|
{
|
|
v4l2_std_id *id = arg;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < TVNORMS; i++)
|
|
if (*id == tvnorms[i].id)
|
|
break;
|
|
if (i == TVNORMS)
|
|
for (i = 0; i < TVNORMS; i++)
|
|
if (*id & tvnorms[i].id)
|
|
break;
|
|
if (i == TVNORMS)
|
|
return -EINVAL;
|
|
|
|
down(&dev->lock);
|
|
dev->tvnorm = &tvnorms[i];
|
|
|
|
em2820_set_norm(dev, dev->width, dev->height);
|
|
|
|
/*
|
|
dev->width=norm_maxw(dev);
|
|
dev->height=norm_maxh(dev);
|
|
dev->frame_size=dev->width*dev->height*2;
|
|
dev->field_size=dev->frame_size>>1;
|
|
dev->bytesperline=dev->width*2;
|
|
dev->hscale=0;
|
|
dev->vscale=0;
|
|
|
|
em2820_resolution_set(dev);
|
|
*/
|
|
/*
|
|
em2820_uninit_isoc(dev);
|
|
em2820_set_alternate(dev);
|
|
em2820_capture_start(dev, 1);
|
|
em2820_resolution_set(dev);
|
|
em2820_init_isoc(dev);
|
|
*/
|
|
em2820_i2c_call_clients(dev, DECODER_SET_NORM,
|
|
&tvnorms[i].mode);
|
|
em2820_i2c_call_clients(dev, VIDIOC_S_STD,
|
|
&dev->tvnorm->id);
|
|
|
|
up(&dev->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ------ input switching ---------- */
|
|
case VIDIOC_ENUMINPUT:
|
|
{
|
|
struct v4l2_input *i = arg;
|
|
unsigned int n;
|
|
static const char *iname[] = {
|
|
[EM2820_VMUX_COMPOSITE1] = "Composite1",
|
|
[EM2820_VMUX_COMPOSITE2] = "Composite2",
|
|
[EM2820_VMUX_COMPOSITE3] = "Composite3",
|
|
[EM2820_VMUX_COMPOSITE4] = "Composite4",
|
|
[EM2820_VMUX_SVIDEO] = "S-Video",
|
|
[EM2820_VMUX_TELEVISION] = "Television",
|
|
[EM2820_VMUX_CABLE] = "Cable TV",
|
|
[EM2820_VMUX_DVB] = "DVB",
|
|
[EM2820_VMUX_DEBUG] = "for debug only",
|
|
};
|
|
|
|
n = i->index;
|
|
if (n >= MAX_EM2820_INPUT)
|
|
return -EINVAL;
|
|
if (0 == INPUT(n)->type)
|
|
return -EINVAL;
|
|
memset(i, 0, sizeof(*i));
|
|
i->index = n;
|
|
i->type = V4L2_INPUT_TYPE_CAMERA;
|
|
strcpy(i->name, iname[INPUT(n)->type]);
|
|
if ((EM2820_VMUX_TELEVISION == INPUT(n)->type) ||
|
|
(EM2820_VMUX_CABLE == INPUT(n)->type))
|
|
i->type = V4L2_INPUT_TYPE_TUNER;
|
|
for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
|
|
i->std |= tvnorms[n].id;
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOC_G_INPUT:
|
|
{
|
|
int *i = arg;
|
|
*i = dev->ctl_input;
|
|
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOC_S_INPUT:
|
|
{
|
|
int *index = arg;
|
|
|
|
if (*index >= MAX_EM2820_INPUT)
|
|
return -EINVAL;
|
|
if (0 == INPUT(*index)->type)
|
|
return -EINVAL;
|
|
|
|
down(&dev->lock);
|
|
video_mux(dev, *index);
|
|
up(&dev->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOC_G_AUDIO:
|
|
{
|
|
struct v4l2_audio *a = arg;
|
|
unsigned int index = a->index;
|
|
|
|
if (a->index > 1)
|
|
return -EINVAL;
|
|
memset(a, 0, sizeof(*a));
|
|
index = dev->ctl_ainput;
|
|
|
|
if (index == 0) {
|
|
strcpy(a->name, "Television");
|
|
} else {
|
|
strcpy(a->name, "Line In");
|
|
}
|
|
a->capability = V4L2_AUDCAP_STEREO;
|
|
a->index = index;
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOC_S_AUDIO:
|
|
{
|
|
struct v4l2_audio *a = arg;
|
|
if (a->index != dev->ctl_ainput)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* --- controls ---------------------------------------------- */
|
|
case VIDIOC_QUERYCTRL:
|
|
{
|
|
struct v4l2_queryctrl *qc = arg;
|
|
u8 i, n;
|
|
n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]);
|
|
for (i = 0; i < n; i++)
|
|
if (qc->id && qc->id == em2820_qctrl[i].id) {
|
|
memcpy(qc, &(em2820_qctrl[i]),
|
|
sizeof(*qc));
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
case VIDIOC_G_CTRL:
|
|
{
|
|
struct v4l2_control *ctrl = arg;
|
|
|
|
|
|
return em2820_get_ctrl(dev, ctrl);
|
|
}
|
|
|
|
case VIDIOC_S_CTRL_OLD: /* ??? */
|
|
case VIDIOC_S_CTRL:
|
|
{
|
|
struct v4l2_control *ctrl = arg;
|
|
u8 i, n;
|
|
|
|
|
|
n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]);
|
|
for (i = 0; i < n; i++)
|
|
if (ctrl->id == em2820_qctrl[i].id) {
|
|
if (ctrl->value <
|
|
em2820_qctrl[i].minimum
|
|
|| ctrl->value >
|
|
em2820_qctrl[i].maximum)
|
|
return -ERANGE;
|
|
|
|
return em2820_set_ctrl(dev, ctrl);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* --- tuner ioctls ------------------------------------------ */
|
|
case VIDIOC_G_TUNER:
|
|
{
|
|
struct v4l2_tuner *t = arg;
|
|
int status = 0;
|
|
|
|
if (0 != t->index)
|
|
return -EINVAL;
|
|
|
|
memset(t, 0, sizeof(*t));
|
|
strcpy(t->name, "Tuner");
|
|
t->type = V4L2_TUNER_ANALOG_TV;
|
|
t->capability = V4L2_TUNER_CAP_NORM;
|
|
t->rangehigh = 0xffffffffUL; /* FIXME: set correct range */
|
|
/* t->signal = 0xffff;*/
|
|
/* em2820_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
|
|
/* No way to get signal strength? */
|
|
down(&dev->lock);
|
|
em2820_i2c_call_clients(dev, DECODER_GET_STATUS,
|
|
&status);
|
|
up(&dev->lock);
|
|
t->signal =
|
|
(status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
|
|
|
|
em2820_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x", t->signal,
|
|
t->afc);
|
|
return 0;
|
|
}
|
|
case VIDIOC_S_TUNER:
|
|
{
|
|
struct v4l2_tuner *t = arg;
|
|
int status = 0;
|
|
|
|
if (0 != t->index)
|
|
return -EINVAL;
|
|
memset(t, 0, sizeof(*t));
|
|
strcpy(t->name, "Tuner");
|
|
t->type = V4L2_TUNER_ANALOG_TV;
|
|
t->capability = V4L2_TUNER_CAP_NORM;
|
|
t->rangehigh = 0xffffffffUL; /* FIXME: set correct range */
|
|
/* t->signal = 0xffff; */
|
|
/* No way to get signal strength? */
|
|
down(&dev->lock);
|
|
em2820_i2c_call_clients(dev, DECODER_GET_STATUS,
|
|
&status);
|
|
up(&dev->lock);
|
|
t->signal =
|
|
(status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
|
|
|
|
em2820_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
|
|
t->signal, t->afc);
|
|
return 0;
|
|
}
|
|
case VIDIOC_G_FREQUENCY:
|
|
{
|
|
struct v4l2_frequency *f = arg;
|
|
|
|
memset(f, 0, sizeof(*f));
|
|
f->type = V4L2_TUNER_ANALOG_TV;
|
|
f->frequency = dev->ctl_freq;
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOC_S_FREQUENCY:
|
|
{
|
|
struct v4l2_frequency *f = arg;
|
|
|
|
if (0 != f->tuner)
|
|
return -EINVAL;
|
|
|
|
if (V4L2_TUNER_ANALOG_TV != f->type)
|
|
return -EINVAL;
|
|
|
|
down(&dev->lock);
|
|
dev->ctl_freq = f->frequency;
|
|
em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
|
|
up(&dev->lock);
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOC_CROPCAP:
|
|
{
|
|
struct v4l2_cropcap *cc = arg;
|
|
|
|
if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return EINVAL;
|
|
cc->bounds.left = 0;
|
|
cc->bounds.top = 0;
|
|
cc->bounds.width = dev->width;
|
|
cc->bounds.height = dev->height;
|
|
cc->defrect = cc->bounds;
|
|
cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
|
|
cc->pixelaspect.denominator = 59;
|
|
return 0;
|
|
}
|
|
case VIDIOC_STREAMON:
|
|
{
|
|
int *type = arg;
|
|
|
|
if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
|
|
|| dev->io != IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
if (list_empty(&dev->inqueue))
|
|
return -EINVAL;
|
|
|
|
dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
|
|
|
|
em2820_videodbg("VIDIOC_STREAMON: starting stream");
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOC_STREAMOFF:
|
|
{
|
|
int *type = arg;
|
|
int ret;
|
|
|
|
if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
|
|
|| dev->io != IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
if (dev->stream == STREAM_ON) {
|
|
em2820_videodbg ("VIDIOC_STREAMOFF: interrupting stream");
|
|
if ((ret = em2820_stream_interrupt(dev)))
|
|
return ret;
|
|
}
|
|
em2820_empty_framequeues(dev);
|
|
|
|
return 0;
|
|
}
|
|
default:
|
|
return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
|
|
driver_ioctl);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* em2820_v4l2_do_ioctl()
|
|
* This function is _not_ called directly, but from
|
|
* em2820_v4l2_ioctl. Userspace
|
|
* copying is done already, arg is a kernel pointer.
|
|
*/
|
|
static int em2820_video_do_ioctl(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, void *arg)
|
|
{
|
|
struct em2820 *dev = filp->private_data;
|
|
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
if (video_debug > 1)
|
|
em2820_print_ioctl(dev->name,cmd);
|
|
|
|
switch (cmd) {
|
|
|
|
/* --- capabilities ------------------------------------------ */
|
|
case VIDIOC_QUERYCAP:
|
|
{
|
|
struct v4l2_capability *cap = arg;
|
|
|
|
memset(cap, 0, sizeof(*cap));
|
|
strlcpy(cap->driver, "em2820", sizeof(cap->driver));
|
|
strlcpy(cap->card, em2820_boards[dev->model].name,
|
|
sizeof(cap->card));
|
|
strlcpy(cap->bus_info, dev->udev->dev.bus_id,
|
|
sizeof(cap->bus_info));
|
|
cap->version = EM2820_VERSION_CODE;
|
|
cap->capabilities =
|
|
V4L2_CAP_VIDEO_CAPTURE |
|
|
V4L2_CAP_AUDIO |
|
|
V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
|
|
if (dev->has_tuner)
|
|
cap->capabilities |= V4L2_CAP_TUNER;
|
|
return 0;
|
|
}
|
|
|
|
/* --- capture ioctls ---------------------------------------- */
|
|
case VIDIOC_ENUM_FMT:
|
|
{
|
|
struct v4l2_fmtdesc *fmtd = arg;
|
|
|
|
if (fmtd->index != 0)
|
|
return -EINVAL;
|
|
memset(fmtd, 0, sizeof(*fmtd));
|
|
fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
strcpy(fmtd->description, "Packed YUY2");
|
|
fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
|
|
memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOC_G_FMT:
|
|
{
|
|
struct v4l2_format *format = arg;
|
|
|
|
em2820_videodbg("VIDIOC_G_FMT: type=%s",
|
|
format->type ==
|
|
V4L2_BUF_TYPE_VIDEO_CAPTURE ?
|
|
"V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
|
|
V4L2_BUF_TYPE_VBI_CAPTURE ?
|
|
"V4L2_BUF_TYPE_VBI_CAPTURE " :
|
|
"not supported");
|
|
|
|
if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
format->fmt.pix.width = dev->width;
|
|
format->fmt.pix.height = dev->height;
|
|
format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
|
|
format->fmt.pix.bytesperline = dev->bytesperline;
|
|
format->fmt.pix.sizeimage = dev->frame_size;
|
|
format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
|
|
format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
|
|
|
|
em2820_videodbg("VIDIOC_G_FMT: %dx%d", dev->width,
|
|
dev->height);
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOC_TRY_FMT:
|
|
case VIDIOC_S_FMT:
|
|
{
|
|
struct v4l2_format *format = arg;
|
|
u32 i;
|
|
int ret = 0;
|
|
int width = format->fmt.pix.width;
|
|
int height = format->fmt.pix.height;
|
|
unsigned int hscale, vscale;
|
|
unsigned int maxh, maxw;
|
|
|
|
maxw = norm_maxw(dev);
|
|
maxh = norm_maxh(dev);
|
|
|
|
/* int both_fields; */
|
|
|
|
em2820_videodbg("%s: type=%s",
|
|
cmd ==
|
|
VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
|
|
"VIDIOC_S_FMT",
|
|
format->type ==
|
|
V4L2_BUF_TYPE_VIDEO_CAPTURE ?
|
|
"V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
|
|
V4L2_BUF_TYPE_VBI_CAPTURE ?
|
|
"V4L2_BUF_TYPE_VBI_CAPTURE " :
|
|
"not supported");
|
|
|
|
if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
em2820_videodbg("%s: requested %dx%d",
|
|
cmd ==
|
|
VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
|
|
"VIDIOC_S_FMT", format->fmt.pix.width,
|
|
format->fmt.pix.height);
|
|
|
|
/* FIXME: Move some code away from here */
|
|
/* width must even because of the YUYV format */
|
|
/* height must be even because of interlacing */
|
|
height &= 0xfffe;
|
|
width &= 0xfffe;
|
|
|
|
if (height < 32)
|
|
height = 32;
|
|
if (height > maxh)
|
|
height = maxh;
|
|
if (width < 48)
|
|
width = 48;
|
|
if (width > maxw)
|
|
width = maxw;
|
|
|
|
if ((hscale =
|
|
(((unsigned long)maxw) << 12) / width - 4096L) >=
|
|
0x4000)
|
|
hscale = 0x3fff;
|
|
width =
|
|
(((unsigned long)maxw) << 12) / (hscale + 4096L);
|
|
|
|
if ((vscale =
|
|
(((unsigned long)maxh) << 12) / height - 4096L) >=
|
|
0x4000)
|
|
vscale = 0x3fff;
|
|
height =
|
|
(((unsigned long)maxh) << 12) / (vscale + 4096L);
|
|
|
|
format->fmt.pix.width = width;
|
|
format->fmt.pix.height = height;
|
|
format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
|
|
format->fmt.pix.bytesperline = width * 2;
|
|
format->fmt.pix.sizeimage = width * 2 * height;
|
|
format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
|
|
format->fmt.pix.field = V4L2_FIELD_INTERLACED;
|
|
|
|
em2820_videodbg("%s: returned %dx%d (%d, %d)",
|
|
cmd ==
|
|
VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
|
|
"VIDIOC_S_FMT", format->fmt.pix.width,
|
|
format->fmt.pix.height, hscale, vscale);
|
|
|
|
if (cmd == VIDIOC_TRY_FMT)
|
|
return 0;
|
|
|
|
for (i = 0; i < dev->num_frames; i++)
|
|
if (dev->frame[i].vma_use_count) {
|
|
em2820_videodbg("VIDIOC_S_FMT failed. "
|
|
"Unmap the buffers first.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* stop io in case it is already in progress */
|
|
if (dev->stream == STREAM_ON) {
|
|
em2820_videodbg("VIDIOC_SET_FMT: interupting stream");
|
|
if ((ret = em2820_stream_interrupt(dev)))
|
|
return ret;
|
|
}
|
|
|
|
em2820_release_buffers(dev);
|
|
dev->io = IO_NONE;
|
|
|
|
/* set new image size */
|
|
dev->width = width;
|
|
dev->height = height;
|
|
dev->frame_size = dev->width * dev->height * 2;
|
|
dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
|
|
dev->bytesperline = dev->width * 2;
|
|
dev->hscale = hscale;
|
|
dev->vscale = vscale;
|
|
/* dev->both_fileds = both_fileds; */
|
|
em2820_uninit_isoc(dev);
|
|
em2820_set_alternate(dev);
|
|
em2820_capture_start(dev, 1);
|
|
em2820_resolution_set(dev);
|
|
em2820_init_isoc(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* --- streaming capture ------------------------------------- */
|
|
case VIDIOC_REQBUFS:
|
|
{
|
|
struct v4l2_requestbuffers *rb = arg;
|
|
u32 i;
|
|
int ret;
|
|
|
|
if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
|
|
rb->memory != V4L2_MEMORY_MMAP)
|
|
return -EINVAL;
|
|
|
|
if (dev->io == IO_READ) {
|
|
em2820_videodbg ("method is set to read;"
|
|
" close and open the device again to"
|
|
" choose the mmap I/O method");
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < dev->num_frames; i++)
|
|
if (dev->frame[i].vma_use_count) {
|
|
em2820_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (dev->stream == STREAM_ON) {
|
|
em2820_videodbg("VIDIOC_REQBUFS: interrupting stream");
|
|
if ((ret = em2820_stream_interrupt(dev)))
|
|
return ret;
|
|
}
|
|
|
|
em2820_empty_framequeues(dev);
|
|
|
|
em2820_release_buffers(dev);
|
|
if (rb->count)
|
|
rb->count =
|
|
em2820_request_buffers(dev, rb->count);
|
|
|
|
dev->frame_current = NULL;
|
|
|
|
em2820_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i",
|
|
rb->count);
|
|
dev->io = rb->count ? IO_MMAP : IO_NONE;
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOC_QUERYBUF:
|
|
{
|
|
struct v4l2_buffer *b = arg;
|
|
|
|
if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
|
|
b->index >= dev->num_frames || dev->io != IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
|
|
|
|
if (dev->frame[b->index].vma_use_count) {
|
|
b->flags |= V4L2_BUF_FLAG_MAPPED;
|
|
}
|
|
if (dev->frame[b->index].state == F_DONE)
|
|
b->flags |= V4L2_BUF_FLAG_DONE;
|
|
else if (dev->frame[b->index].state != F_UNUSED)
|
|
b->flags |= V4L2_BUF_FLAG_QUEUED;
|
|
return 0;
|
|
}
|
|
case VIDIOC_QBUF:
|
|
{
|
|
struct v4l2_buffer *b = arg;
|
|
unsigned long lock_flags;
|
|
|
|
if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
|
|
b->index >= dev->num_frames || dev->io != IO_MMAP) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (dev->frame[b->index].state != F_UNUSED) {
|
|
return -EAGAIN;
|
|
}
|
|
dev->frame[b->index].state = F_QUEUED;
|
|
|
|
/* add frame to fifo */
|
|
spin_lock_irqsave(&dev->queue_lock, lock_flags);
|
|
list_add_tail(&dev->frame[b->index].frame,
|
|
&dev->inqueue);
|
|
spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOC_DQBUF:
|
|
{
|
|
struct v4l2_buffer *b = arg;
|
|
struct em2820_frame_t *f;
|
|
unsigned long lock_flags;
|
|
int ret = 0;
|
|
|
|
if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
|
|
|| dev->io != IO_MMAP)
|
|
return -EINVAL;
|
|
|
|
if (list_empty(&dev->outqueue)) {
|
|
if (dev->stream == STREAM_OFF)
|
|
return -EINVAL;
|
|
if (filp->f_flags & O_NONBLOCK)
|
|
return -EAGAIN;
|
|
ret = wait_event_interruptible
|
|
(dev->wait_frame,
|
|
(!list_empty(&dev->outqueue)) ||
|
|
(dev->state & DEV_DISCONNECTED));
|
|
if (ret)
|
|
return ret;
|
|
if (dev->state & DEV_DISCONNECTED)
|
|
return -ENODEV;
|
|
}
|
|
|
|
spin_lock_irqsave(&dev->queue_lock, lock_flags);
|
|
f = list_entry(dev->outqueue.next,
|
|
struct em2820_frame_t, frame);
|
|
list_del(dev->outqueue.next);
|
|
spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
|
|
|
|
f->state = F_UNUSED;
|
|
memcpy(b, &f->buf, sizeof(*b));
|
|
|
|
if (f->vma_use_count)
|
|
b->flags |= V4L2_BUF_FLAG_MAPPED;
|
|
|
|
return 0;
|
|
}
|
|
default:
|
|
return em2820_do_ioctl(inode, filp, dev, cmd, arg,
|
|
em2820_video_do_ioctl);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* em2820_v4l2_ioctl()
|
|
* handle v4l2 ioctl the main action happens in em2820_v4l2_do_ioctl()
|
|
*/
|
|
static int em2820_v4l2_ioctl(struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct em2820 *dev = video_get_drvdata(video_devdata(filp));
|
|
int ret = 0;
|
|
|
|
if (down_interruptible(&dev->fileop_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (dev->state & DEV_DISCONNECTED) {
|
|
em2820_errdev("v4l2 ioctl: device not present\n");
|
|
up(&dev->fileop_lock);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (dev->state & DEV_MISCONFIGURED) {
|
|
em2820_errdev
|
|
("v4l2 ioctl: device is misconfigured; close and open it again\n");
|
|
up(&dev->fileop_lock);
|
|
return -EIO;
|
|
}
|
|
|
|
ret = video_usercopy(inode, filp, cmd, arg, em2820_video_do_ioctl);
|
|
|
|
up(&dev->fileop_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct file_operations em2820_v4l_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = em2820_v4l2_open,
|
|
.release = em2820_v4l2_close,
|
|
.ioctl = em2820_v4l2_ioctl,
|
|
.read = em2820_v4l2_read,
|
|
.poll = em2820_v4l2_poll,
|
|
.mmap = em2820_v4l2_mmap,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
/******************************** usb interface *****************************************/
|
|
|
|
/*
|
|
* em2820_init_dev()
|
|
* allocates and inits the device structs, registers i2c bus and v4l device
|
|
*/
|
|
static int em2820_init_dev(struct em2820 **devhandle, struct usb_device *udev,
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int minor, int model)
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{
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struct em2820 *dev;
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int retval = -ENOMEM;
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int errCode, i;
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unsigned int maxh, maxw;
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struct usb_interface *uif;
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/* allocate memory for our device state and initialize it */
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dev = kmalloc(sizeof(*dev), GFP_KERNEL);
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if (dev == NULL) {
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em2820_err(DRIVER_NAME ": out of memory!\n");
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return -ENOMEM;
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}
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memset(dev, 0x00, sizeof(*dev));
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snprintf(dev->name, 29, "em2820 #%d", minor);
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dev->udev = udev;
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dev->model = model;
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init_MUTEX(&dev->lock);
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init_waitqueue_head(&dev->open);
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dev->em2820_write_regs = em2820_write_regs;
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dev->em2820_read_reg = em2820_read_reg;
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dev->em2820_read_reg_req_len = em2820_read_reg_req_len;
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dev->em2820_write_regs_req = em2820_write_regs_req;
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dev->em2820_read_reg_req = em2820_read_reg_req;
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dev->has_tuner = em2820_boards[model].has_tuner;
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dev->has_msp34xx = em2820_boards[model].has_msp34xx;
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dev->tda9887_conf = em2820_boards[model].tda9887_conf;
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dev->decoder = em2820_boards[model].decoder;
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if (tuner >= 0)
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dev->tuner_type = tuner;
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else
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dev->tuner_type = em2820_boards[model].tuner_type;
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dev->video_inputs = em2820_boards[model].vchannels;
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for (i = 0; i < TVNORMS; i++)
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if (em2820_boards[model].norm == tvnorms[i].mode)
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break;
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if (i == TVNORMS)
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i = 0;
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dev->tvnorm = &tvnorms[i]; /* set default norm */
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em2820_videodbg("tvnorm=%s\n", dev->tvnorm->name);
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maxw = norm_maxw(dev);
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maxh = norm_maxh(dev);
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/* set default image size */
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dev->width = maxw;
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dev->height = maxh;
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dev->interlaced = EM2820_INTERLACED_DEFAULT;
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dev->field_size = dev->width * dev->height;
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dev->frame_size =
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dev->interlaced ? dev->field_size << 1 : dev->field_size;
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dev->bytesperline = dev->width * 2;
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dev->hscale = 0;
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dev->vscale = 0;
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dev->ctl_input = 2;
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/* setup video picture settings for saa7113h */
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memset(&dev->vpic, 0, sizeof(dev->vpic));
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dev->vpic.colour = 128 << 8;
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dev->vpic.hue = 128 << 8;
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dev->vpic.brightness = 128 << 8;
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dev->vpic.contrast = 192 << 8;
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dev->vpic.whiteness = 128 << 8; /* This one isn't used */
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dev->vpic.depth = 16;
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dev->vpic.palette = VIDEO_PALETTE_YUV422;
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/* compute alternate max packet sizes */
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uif = dev->udev->actconfig->interface[0];
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dev->alt_max_pkt_size[0] = 0;
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for (i = 1; i <= EM2820_MAX_ALT; i++) {
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u16 tmp =
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le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
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wMaxPacketSize);
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dev->alt_max_pkt_size[i] =
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(tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
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}
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#ifdef CONFIG_MODULES
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/* request some modules */
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if (dev->decoder == EM2820_SAA7113)
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request_module("saa7113");
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if (dev->decoder == EM2820_SAA7114)
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request_module("saa7114");
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if (dev->decoder == EM2820_TVP5150)
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request_module("tvp5150");
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if (dev->has_tuner)
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request_module("tuner");
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if (dev->tda9887_conf)
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request_module("tda9887");
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#endif
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errCode = em2820_config(dev);
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if (errCode) {
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em2820_errdev("error configuring device\n");
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kfree(dev);
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return -ENOMEM;
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}
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down(&dev->lock);
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/* register i2c bus */
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em2820_i2c_register(dev);
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/* Do board specific init and eeprom reading */
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em2820_card_setup(dev);
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/* configure the device */
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em2820_config_i2c(dev);
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up(&dev->lock);
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errCode = em2820_config(dev);
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#ifdef CONFIG_MODULES
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if (dev->has_msp34xx)
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request_module("msp3400");
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#endif
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/* allocate and fill v4l2 device struct */
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dev->vdev = video_device_alloc();
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if (NULL == dev->vdev) {
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em2820_errdev("cannot allocate video_device.\n");
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kfree(dev);
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return -ENOMEM;
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}
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dev->vdev->owner = THIS_MODULE;
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dev->vdev->type = VID_TYPE_CAPTURE;
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if (dev->has_tuner)
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dev->vdev->type |= VID_TYPE_TUNER;
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dev->vdev->hardware = 0;
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dev->vdev->fops = &em2820_v4l_fops;
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dev->vdev->minor = -1;
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dev->vdev->dev = &dev->udev->dev;
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dev->vdev->release = video_device_release;
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snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s",
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"em2820 video");
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video_set_drvdata(dev->vdev, dev);
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/* register v4l2 device */
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down(&dev->lock);
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if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) {
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em2820_errdev("unable to register video device (error=%i).\n",
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retval);
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up(&dev->lock);
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video_set_drvdata(dev->vdev, NULL);
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video_device_release(dev->vdev);
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kfree(dev);
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return -ENODEV;
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}
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if (dev->has_msp34xx) {
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/* Send a reset to other chips via gpio */
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em2820_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
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udelay(2500);
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em2820_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
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udelay(2500);
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}
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video_mux(dev, 0);
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up(&dev->lock);
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em2820_info("V4L2 device registered as /dev/video%d\n",
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dev->vdev->minor);
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*devhandle = dev;
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return 0;
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}
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/*
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* em2820_usb_probe()
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* checks for supported devices
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*/
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static int em2820_usb_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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const struct usb_endpoint_descriptor *endpoint;
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struct usb_device *udev;
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struct em2820 *dev = NULL;
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int retval = -ENODEV;
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udev = usb_get_dev(interface_to_usbdev(interface));
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endpoint = &interface->cur_altsetting->endpoint[1].desc;
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/* check if the the device has the iso in endpoint at the correct place */
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if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
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USB_ENDPOINT_XFER_ISOC) {
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/* em2820_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n"); */
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return -ENODEV;
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}
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if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
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/* em2820_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n"); */
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return -ENODEV;
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}
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/* allocate device struct */
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retval = em2820_init_dev(&dev, udev, interface->minor, id->driver_info);
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if (retval)
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return retval;
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em2820_info("Found %s\n", em2820_boards[id->driver_info].name);
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/* save our data pointer in this interface device */
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usb_set_intfdata(interface, dev);
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return 0;
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}
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/*
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* em2820_usb_disconnect()
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* called when the device gets diconencted
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* video device will be unregistered on v4l2_close in case it is still open
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*/
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static void em2820_usb_disconnect(struct usb_interface *interface)
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{
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struct em2820 *dev = usb_get_intfdata(interface);
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usb_set_intfdata(interface, NULL);
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if (!dev)
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return;
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down_write(&em2820_disconnect);
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down(&dev->lock);
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em2820_info("disconnecting %s\n", dev->vdev->name);
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wake_up_interruptible_all(&dev->open);
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if (dev->users) {
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em2820_warn
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("device /dev/video%d is open! Deregistration and memory "
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"deallocation are deferred on close.\n", dev->vdev->minor);
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dev->state |= DEV_MISCONFIGURED;
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em2820_uninit_isoc(dev);
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dev->state |= DEV_DISCONNECTED;
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wake_up_interruptible(&dev->wait_frame);
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wake_up_interruptible(&dev->wait_stream);
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} else {
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dev->state |= DEV_DISCONNECTED;
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em2820_release_resources(dev);
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}
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up(&dev->lock);
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if (!dev->users)
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kfree(dev);
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up_write(&em2820_disconnect);
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}
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static struct usb_driver em2820_usb_driver = {
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.owner = THIS_MODULE,
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.name = "em2820",
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.probe = em2820_usb_probe,
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.disconnect = em2820_usb_disconnect,
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.id_table = em2820_id_table,
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};
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static int __init em2820_module_init(void)
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{
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int result;
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printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
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(EM2820_VERSION_CODE >> 16) & 0xff,
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(EM2820_VERSION_CODE >> 8) & 0xff, EM2820_VERSION_CODE & 0xff);
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#ifdef SNAPSHOT
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printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
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SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
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#endif
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/* register this driver with the USB subsystem */
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result = usb_register(&em2820_usb_driver);
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if (result)
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em2820_err(DRIVER_NAME
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" usb_register failed. Error number %d.\n", result);
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return result;
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}
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static void __exit em2820_module_exit(void)
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{
|
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/* deregister this driver with the USB subsystem */
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usb_deregister(&em2820_usb_driver);
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}
|
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module_init(em2820_module_init);
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module_exit(em2820_module_exit);
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