Re: [PATCH 3/3] STA2X11 VIP: new V4L2 driver

Hans Verkuil
2012-05-20T15:43:33Z

Hi Federico,

This driver is now merged, but I'm not happy with this.

The main criticism is that it doesn't use videobuf2, but still uses the old
videobuf framework. You really, really should upgrade.

There is also no reason to return -EBUSY if someone opens the device node a
second time. That's a perfectly valid thing to do.

And please run the v4l2-compliance tool for your driver (found in the
v4l-utils.git repository). It will find quite a few issues, I'm sure.

I see that there was no review of this code at the time you posted it.
Normally I would have reviewed it, but as I mentioned earlier, I was temporarily
absent from the list at the time. It's too bad that I'm finding these issues
so late. I hope you can spend some time upgrading the driver for 3.6.

Regards,

Hans

On Thu April 12 2012 18:39:38 Federico Vaga wrote:
> V4L2 driver for the Video Input Port within STA2X11 board
>
> Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
> Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com>
> Cc: Alan Cox <alan@linux.intel.com>
> ---
> drivers/media/video/Kconfig | 13 +
> drivers/media/video/Makefile | 1 +
> drivers/media/video/sta2x11_vip.c | 1550 +++++++++++++++++++++++++++++++++++++
> drivers/media/video/sta2x11_vip.h | 40 +
> 4 files changed, 1604 insertions(+), 0 deletions(-)
> create mode 100644 drivers/media/video/sta2x11_vip.c
> create mode 100644 drivers/media/video/sta2x11_vip.h
>
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index f2479c5..32c6c0e 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -794,6 +794,19 @@ source "drivers/media/video/saa7164/Kconfig"
>
> source "drivers/media/video/zoran/Kconfig"
>
> +config STA2X11_VIP
> + tristate "STA2X11 VIP Video For Linux"
> + depends on STA2X11
> + select VIDEO_ADV7180 if VIDEO_HELPER_CHIPS_AUTO
> + select VIDEOBUF_DMA_CONTIG
> + depends on PCI && VIDEO_V4L2 && VIRT_TO_BUS
> + help
> + Say Y for support for STA2X11 VIP (Video Input Port) capture
> + device.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called sta2x11_vip.
> +
> endif # V4L_PCI_DRIVERS
>
> #
> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
> index a6282a3..2a05b9a 100644
> --- a/drivers/media/video/Makefile
> +++ b/drivers/media/video/Makefile
> @@ -120,6 +120,7 @@ obj-$(CONFIG_VIDEO_TM6000) += tm6000/
> obj-$(CONFIG_VIDEO_MXB) += mxb.o
> obj-$(CONFIG_VIDEO_HEXIUM_ORION) += hexium_orion.o
> obj-$(CONFIG_VIDEO_HEXIUM_GEMINI) += hexium_gemini.o
> +obj-$(CONFIG_STA2X11_VIP) += sta2x11_vip.o
> obj-$(CONFIG_VIDEO_TIMBERDALE) += timblogiw.o
>
> obj-$(CONFIG_VIDEOBUF_GEN) += videobuf-core.o
> diff --git a/drivers/media/video/sta2x11_vip.c b/drivers/media/video/sta2x11_vip.c
> new file mode 100644
> index 0000000..636643f
> --- /dev/null
> +++ b/drivers/media/video/sta2x11_vip.c
> @@ -0,0 +1,1550 @@
> +/*
> + * This is the driver for the STA2x11 Video Input Port.
> + *
> + * Copyright (C) 2010 WindRiver Systems, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program; if not, write to the Free Software Foundation, Inc.,
> + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
> + *
> + * The full GNU General Public License is included in this distribution in
> + * the file called "COPYING".
> + *
> + * Author: Andreas Kies <andreas.kies@windriver.com>
> + * Vlad Lungu <vlad.lungu@windriver.com>
> + *
> + */
> +
> +#include <linux/types.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/vmalloc.h>
> +
> +#include <linux/videodev2.h>
> +
> +#include <linux/kmod.h>
> +
> +#include <linux/pci.h>
> +#include <linux/interrupt.h>
> +#include <linux/mutex.h>
> +#include <linux/io.h>
> +#include <linux/gpio.h>
> +#include <linux/i2c.h>
> +#include <linux/delay.h>
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/videobuf-dma-contig.h>
> +
> +#include "sta2x11_vip.h"
> +
> +#define DRV_NAME "sta2x11_vip"
> +#define DRV_VERSION "1.3"
> +
> +#ifndef PCI_DEVICE_ID_STMICRO_VIP
> +#define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D
> +#endif
> +
> +#define MAX_FRAMES 4
> +
> +/*Register offsets*/
> +#define DVP_CTL 0x00
> +#define DVP_TFO 0x04
> +#define DVP_TFS 0x08
> +#define DVP_BFO 0x0C
> +#define DVP_BFS 0x10
> +#define DVP_VTP 0x14
> +#define DVP_VBP 0x18
> +#define DVP_VMP 0x1C
> +#define DVP_ITM 0x98
> +#define DVP_ITS 0x9C
> +#define DVP_STA 0xA0
> +#define DVP_HLFLN 0xA8
> +#define DVP_RGB 0xC0
> +#define DVP_PKZ 0xF0
> +
> +/*Register fields*/
> +#define DVP_CTL_ENA 0x00000001
> +#define DVP_CTL_RST 0x80000000
> +#define DVP_CTL_DIS (~0x00040001)
> +
> +#define DVP_IT_VSB 0x00000008
> +#define DVP_IT_VST 0x00000010
> +#define DVP_IT_FIFO 0x00000020
> +
> +#define DVP_HLFLN_SD 0x00000001
> +
> +#define REG_WRITE(vip, reg, value) iowrite32((value), (vip->iomem)+(reg))
> +#define REG_READ(vip, reg) ioread32((vip->iomem)+(reg))
> +
> +#define SAVE_COUNT 8
> +#define AUX_COUNT 3
> +#define IRQ_COUNT 1
> +
> +/**
> + * struct sta2x11_vip - All internal data for one instance of device
> + * @v4l2_dev: device registered in v4l layer
> + * @video_dev: properties of our device
> + * @pdev: PCI device
> + * @adapter: contains I2C adapter information
> + * @register_save_area: All relevant register are saved here during suspend
> + * @decoder: contains information about video DAC
> + * @format: pixel format, fixed UYVY
> + * @std: video standard (e.g. PAL/NTSC)
> + * @input: input line for video signal ( 0 or 1 )
> + * @users: Number of open of device ( max. 1 )
> + * @disabled: Device is in power down state
> + * @mutex: ensures exclusive opening of device
> + * @slock: for excluse acces of registers
> + * @vb_vidq: queue maintained by videobuf layer
> + * @capture: linked list of capture buffer
> + * @active: struct videobuf_buffer currently beingg filled
> + * @started: device is ready to capture frame
> + * @closing: device will be shut down
> + * @tcount: Number of top frames
> + * @bcount: Number of bottom frames
> + * @overflow: Number of FIFO overflows
> + * @mem_spare: small buffer of unused frame
> + * @dma_spare: dma addres of mem_spare
> + * @iomem: hardware base address
> + * @config: I2C and gpio config from platform
> + *
> + * All non-local data is accessed via this structure.
> + */
> +
> +struct sta2x11_vip {
> + struct v4l2_device v4l2_dev;
> + struct video_device *video_dev;
> + struct pci_dev *pdev;
> + struct i2c_adapter *adapter;
> + unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT];
> + struct v4l2_subdev *decoder;
> + struct v4l2_pix_format format;
> + v4l2_std_id std;
> + unsigned int input;
> + int users;
> + int disabled;
> + struct mutex mutex; /* exclusive access during open */
> + spinlock_t slock; /* spin lock for hardware and queue access */
> + struct videobuf_queue vb_vidq;
> + struct list_head capture;
> + struct videobuf_buffer *active;
> + int started, closing, tcount, bcount;
> + int overflow;
> + void *mem_spare;
> + dma_addr_t dma_spare;
> + void *iomem;
> + struct vip_config *config;
> +};
> +
> +static const unsigned int registers_to_save[AUX_COUNT] = {
> + DVP_HLFLN, DVP_RGB, DVP_PKZ
> +};
> +
> +static struct v4l2_pix_format formats_50[] = {
> + { /*PAL interlaced */
> + .width = 720,
> + .height = 576,
> + .pixelformat = V4L2_PIX_FMT_UYVY,
> + .field = V4L2_FIELD_INTERLACED,
> + .bytesperline = 720 * 2,
> + .sizeimage = 720 * 2 * 576,
> + .colorspace = V4L2_COLORSPACE_SMPTE170M},
> + { /*PAL top */
> + .width = 720,
> + .height = 288,
> + .pixelformat = V4L2_PIX_FMT_UYVY,
> + .field = V4L2_FIELD_TOP,
> + .bytesperline = 720 * 2,
> + .sizeimage = 720 * 2 * 288,
> + .colorspace = V4L2_COLORSPACE_SMPTE170M},
> + { /*PAL bottom */
> + .width = 720,
> + .height = 288,
> + .pixelformat = V4L2_PIX_FMT_UYVY,
> + .field = V4L2_FIELD_BOTTOM,
> + .bytesperline = 720 * 2,
> + .sizeimage = 720 * 2 * 288,
> + .colorspace = V4L2_COLORSPACE_SMPTE170M},
> +
> +};
> +
> +static struct v4l2_pix_format formats_60[] = {
> + { /*NTSC interlaced */
> + .width = 720,
> + .height = 480,
> + .pixelformat = V4L2_PIX_FMT_UYVY,
> + .field = V4L2_FIELD_INTERLACED,
> + .bytesperline = 720 * 2,
> + .sizeimage = 720 * 2 * 480,
> + .colorspace = V4L2_COLORSPACE_SMPTE170M},
> + { /*NTSC top */
> + .width = 720,
> + .height = 240,
> + .pixelformat = V4L2_PIX_FMT_UYVY,
> + .field = V4L2_FIELD_TOP,
> + .bytesperline = 720 * 2,
> + .sizeimage = 720 * 2 * 240,
> + .colorspace = V4L2_COLORSPACE_SMPTE170M},
> + { /*NTSC bottom */
> + .width = 720,
> + .height = 240,
> + .pixelformat = V4L2_PIX_FMT_UYVY,
> + .field = V4L2_FIELD_BOTTOM,
> + .bytesperline = 720 * 2,
> + .sizeimage = 720 * 2 * 240,
> + .colorspace = V4L2_COLORSPACE_SMPTE170M},
> +};
> +
> +/**
> + * buf_setup - Get size and number of video buffer
> + * @vq: queue in videobuf
> + * @count: Number of buffers (1..MAX_FRAMES).
> + * 0 use default value.
> + * @size: size of buffer in bytes
> + *
> + * returns size and number of buffers
> + * a preset value of 0 returns the default number.
> + * return value: 0, always succesfull.
> + */
> +static int buf_setup(struct videobuf_queue *vq, unsigned int *count,
> + unsigned int *size)
> +{
> + struct sta2x11_vip *vip = vq->priv_data;
> +
> + *size = vip->format.width * vip->format.height * 2;
> + if (0 == *count || MAX_FRAMES < *count)
> + *count = MAX_FRAMES;
> + return 0;
> +};
> +
> +/**
> + * buf_prepare - prepare buffer for usage
> + * @vq: queue in videobuf layer
> + * @vb: buffer to be prepared
> + * @field: type of video data (interlaced/non-interlaced)
> + *
> + * Allocate or realloc buffer
> + * return value: 0, successful.
> + *
> + * -EINVAL, supplied buffer is too small.
> + *
> + * other, buffer could not be locked.
> + */
> +static int buf_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
> + enum v4l2_field field)
> +{
> + struct sta2x11_vip *vip = vq->priv_data;
> + int ret;
> +
> + vb->size = vip->format.width * vip->format.height * 2;
> + if ((0 != vb->baddr) && (vb->bsize < vb->size))
> + return -EINVAL;
> + vb->width = vip->format.width;
> + vb->height = vip->format.height;
> + vb->field = field;
> +
> + if (VIDEOBUF_NEEDS_INIT == vb->state) {
> + ret = videobuf_iolock(vq, vb, NULL);
> + if (ret)
> + goto fail;
> + }
> + vb->state = VIDEOBUF_PREPARED;
> + return 0;
> +fail:
> + videobuf_dma_contig_free(vq, vb);
> + vb->state = VIDEOBUF_NEEDS_INIT;
> + return ret;
> +}
> +
> +/**
> + * buf_queu - queue buffer for filling
> + * @vq: queue in videobuf layer
> + * @vb: buffer to be queued
> + *
> + * if capturing is already running, the buffer will be queued. Otherwise
> + * capture is started and the buffer is used directly.
> + */
> +static void buf_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
> +{
> + struct sta2x11_vip *vip = vq->priv_data;
> + u32 dma;
> +
> + vb->state = VIDEOBUF_QUEUED;
> +
> + if (vip->active) {
> + list_add_tail(&vb->queue, &vip->capture);
> + return;
> + }
> +
> + vip->started = 1;
> + vip->tcount = 0;
> + vip->bcount = 0;
> + vip->active = vb;
> + vb->state = VIDEOBUF_ACTIVE;
> +
> + dma = videobuf_to_dma_contig(vb);
> +
> + REG_WRITE(vip, DVP_TFO, (0 << 16) | (0));
> + /* despite of interlace mode, upper and lower frames start at zero */
> + REG_WRITE(vip, DVP_BFO, (0 << 16) | (0));
> +
> + switch (vip->format.field) {
> + case V4L2_FIELD_INTERLACED:
> + REG_WRITE(vip, DVP_TFS,
> + ((vip->format.height / 2 - 1) << 16) |
> + (2 * vip->format.width - 1));
> + REG_WRITE(vip, DVP_BFS, ((vip->format.height / 2 - 1) << 16) |
> + (2 * vip->format.width - 1));
> + REG_WRITE(vip, DVP_VTP, dma);
> + REG_WRITE(vip, DVP_VBP, dma + vip->format.width * 2);
> + REG_WRITE(vip, DVP_VMP, 4 * vip->format.width);
> + break;
> + case V4L2_FIELD_TOP:
> + REG_WRITE(vip, DVP_TFS,
> + ((vip->format.height - 1) << 16) |
> + (2 * vip->format.width - 1));
> + REG_WRITE(vip, DVP_BFS, ((0) << 16) |
> + (2 * vip->format.width - 1));
> + REG_WRITE(vip, DVP_VTP, dma);
> + REG_WRITE(vip, DVP_VBP, dma);
> + REG_WRITE(vip, DVP_VMP, 2 * vip->format.width);
> + break;
> + case V4L2_FIELD_BOTTOM:
> + REG_WRITE(vip, DVP_TFS, ((0) << 16) |
> + (2 * vip->format.width - 1));
> + REG_WRITE(vip, DVP_BFS,
> + ((vip->format.height) << 16) |
> + (2 * vip->format.width - 1));
> + REG_WRITE(vip, DVP_VTP, dma);
> + REG_WRITE(vip, DVP_VBP, dma);
> + REG_WRITE(vip, DVP_VMP, 2 * vip->format.width);
> + break;
> +
> + default:
> + pr_warning("VIP: unknown field format\n");
> + return;
> + }
> +
> + REG_WRITE(vip, DVP_CTL, DVP_CTL_ENA);
> +}
> +
> +/**
> + * buff_release - release buffer
> + * @vq: queue in videobuf layer
> + * @vb: buffer to be released
> + *
> + * release buffer in videobuf layer
> + */
> +static void buf_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
> +{
> +
> + videobuf_dma_contig_free(vq, vb);
> + vb->state = VIDEOBUF_NEEDS_INIT;
> +}
> +
> +static struct videobuf_queue_ops vip_qops = {
> + .buf_setup = buf_setup,
> + .buf_prepare = buf_prepare,
> + .buf_queue = buf_queue,
> + .buf_release = buf_release,
> +};
> +
> +/**
> + * vip_open - open video device
> + * @file: descriptor of device
> + *
> + * open device, make sure it is only opened once.
> + * return value: 0, no error.
> + *
> + * -EBUSY, device is already opened
> + *
> + * -ENOMEM, no memory for auxiliary DMA buffer
> + */
> +static int vip_open(struct file *file)
> +{
> + struct video_device *dev = video_devdata(file);
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + mutex_lock(&vip->mutex);
> + vip->users++;
> +
> + if (vip->users > 1) {
> + vip->users--;
> + mutex_unlock(&vip->mutex);
> + return -EBUSY;
> + }
> +
> + file->private_data = dev;
> + vip->overflow = 0;
> + vip->started = 0;
> + vip->closing = 0;
> + vip->active = NULL;
> +
> + INIT_LIST_HEAD(&vip->capture);
> + vip->mem_spare = dma_alloc_coherent(&vip->pdev->dev, 64,
> + &vip->dma_spare, GFP_KERNEL);
> + if (!vip->mem_spare) {
> + vip->users--;
> + mutex_unlock(&vip->mutex);
> + return -ENOMEM;
> + }
> +
> + mutex_unlock(&vip->mutex);
> + videobuf_queue_dma_contig_init_cached(&vip->vb_vidq,
> + &vip_qops,
> + &vip->pdev->dev,
> + &vip->slock,
> + V4L2_BUF_TYPE_VIDEO_CAPTURE,
> + V4L2_FIELD_INTERLACED,
> + sizeof(struct videobuf_buffer),
> + vip, NULL);
> + REG_READ(vip, DVP_ITS);
> + REG_WRITE(vip, DVP_HLFLN, DVP_HLFLN_SD);
> + REG_WRITE(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST);
> + REG_WRITE(vip, DVP_CTL, DVP_CTL_RST);
> + REG_WRITE(vip, DVP_CTL, 0);
> + REG_READ(vip, DVP_ITS);
> + return 0;
> +}
> +
> +/**
> + * vip_close - close video device
> + * @file: descriptor of device
> + *
> + * close video device, wait until all pending operations are finished
> + * ( maximum FRAME_MAX buffers pending )
> + * Turn off interrupts.
> + *
> + * return value: 0, always succesful.
> + */
> +static int vip_close(struct file *file)
> +{
> + struct video_device *dev = video_devdata(file);
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + vip->closing = 1;
> + if (vip->active)
> + videobuf_waiton(&vip->vb_vidq, vip->active, 0, 0);
> + spin_lock_irq(&vip->slock);
> +
> + REG_WRITE(vip, DVP_ITM, 0);
> + REG_WRITE(vip, DVP_CTL, DVP_CTL_RST);
> + REG_WRITE(vip, DVP_CTL, 0);
> + REG_READ(vip, DVP_ITS);
> +
> + vip->started = 0;
> + vip->active = NULL;
> +
> + spin_unlock_irq(&vip->slock);
> +
> + videobuf_stop(&vip->vb_vidq);
> + videobuf_mmap_free(&vip->vb_vidq);
> +
> + dma_free_coherent(&vip->pdev->dev, 64, vip->mem_spare, vip->dma_spare);
> + file->private_data = NULL;
> + mutex_lock(&vip->mutex);
> + vip->users--;
> + mutex_unlock(&vip->mutex);
> + return 0;
> +}
> +
> +/**
> + * vip_read - read from video input
> + * @file: descriptor of device
> + * @data: user buffer
> + * @count: number of bytes to be read
> + * @ppos: position within stream
> + *
> + * read video data from video device.
> + * handling is done in generic videobuf layer
> + * return value: provided by videobuf layer
> + */
> +static ssize_t vip_read(struct file *file, char __user *data,
> + size_t count, loff_t *ppos)
> +{
> + struct video_device *dev = file->private_data;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_read_stream(&vip->vb_vidq, data, count, ppos, 0,
> + file->f_flags & O_NONBLOCK);
> +}
> +
> +/**
> + * vip_mmap - map user buffer
> + * @file: descriptor of device
> + * @vma: user buffer
> + *
> + * map user space buffer into kernel mode, including DMA address.
> + * handling is done in generic videobuf layer.
> + * return value: provided by videobuf layer
> + */
> +static int vip_mmap(struct file *file, struct vm_area_struct *vma)
> +{
> + struct video_device *dev = file->private_data;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_mmap_mapper(&vip->vb_vidq, vma);
> +}
> +
> +/**
> + * vip_poll - poll for event
> + * @file: descriptor of device
> + * @wait: contains events to be waited for
> + *
> + * wait for event related to video device.
> + * handling is done in generic videobuf layer.
> + * return value: provided by videobuf layer
> + */
> +static unsigned int vip_poll(struct file *file, struct poll_table_struct *wait)
> +{
> + struct video_device *dev = file->private_data;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_poll_stream(file, &vip->vb_vidq, wait);
> +}
> +
> +/**
> + * vidioc_querycap - return capabilities of device
> + * @file: descriptor of device (not used)
> + * @priv: points to current videodevice
> + * @cap: contains return values
> + *
> + * the capabilities of the device are returned
> + *
> + * return value: 0, no error.
> + */
> +static int vidioc_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + memset(cap, 0, sizeof(struct v4l2_capability));
> + strcpy(cap->driver, DRV_NAME);
> + strcpy(cap->card, DRV_NAME);
> + cap->version = 0;
> + snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
> + pci_name(vip->pdev));
> + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
> + V4L2_CAP_STREAMING;
> +
> + return 0;
> +}
> +
> +/**
> + * vidioc_s_std - set video standard
> + * @file: descriptor of device (not used)
> + * @priv: points to current videodevice
> + * @std: contains standard to be set
> + *
> + * the video standard is set
> + *
> + * return value: 0, no error.
> + *
> + * -EIO, no input signal detected
> + *
> + * other, returned from video DAC.
> + */
> +static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *std)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> + v4l2_std_id oldstd = vip->std, newstd;
> + int status;
> +
> + if (V4L2_STD_ALL == *std) {
> + v4l2_subdev_call(vip->decoder, core, s_std, *std);
> + ssleep(2);
> + v4l2_subdev_call(vip->decoder, video, querystd, &newstd);
> + v4l2_subdev_call(vip->decoder, video, g_input_status, &status);
> + if (status & V4L2_IN_ST_NO_SIGNAL)
> + return -EIO;
> + *std = vip->std = newstd;
> + if (oldstd != *std) {
> + if (V4L2_STD_NTSC & (*std))
> + vip->format = formats_60[0];
> + else
> + vip->format = formats_50[0];
> + }
> + return 0;
> + }
> +
> + if (oldstd != *std) {
> + if (V4L2_STD_NTSC & (*std))
> + vip->format = formats_60[0];
> + else
> + vip->format = formats_50[0];
> + }
> +
> + return v4l2_subdev_call(vip->decoder, core, s_std, *std);
> +}
> +
> +/**
> + * vidioc_g_std - get video standard
> + * @file: descriptor of device (not used)
> + * @priv: points to current videodevice
> + * @std: contains return values
> + *
> + * the current video standard is returned
> + *
> + * return value: 0, no error.
> + */
> +static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + *std = vip->std;
> + return 0;
> +}
> +
> +/**
> + * vidioc_querystd - get possible video standards
> + * @file: descriptor of device (not used)
> + * @priv: points to current videodevice
> + * @std: contains return values
> + *
> + * all possible video standards are returned
> + *
> + * return value: delivered by video DAC routine.
> + */
> +static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return v4l2_subdev_call(vip->decoder, video, querystd, std);
> +
> +}
> +
> +/**
> + * vidioc_queryctl - get possible control settings
> + * @file: descriptor of device (not used)
> + * @priv: points to current videodevice
> + * @ctrl: contains return values
> + *
> + * return possible values for a control
> + * return value: delivered by video DAC routine.
> + */
> +static int vidioc_queryctrl(struct file *file, void *priv,
> + struct v4l2_queryctrl *ctrl)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return v4l2_subdev_call(vip->decoder, core, queryctrl, ctrl);
> +}
> +
> +/**
> + * vidioc_g_ctl - get control value
> + * @file: descriptor of device (not used)
> + * @priv: points to current videodevice
> + * @ctrl: contains return values
> + *
> + * return setting for a control value
> + * return value: delivered by video DAC routine.
> + */
> +static int vidioc_g_ctrl(struct file *file, void *priv,
> + struct v4l2_control *ctrl)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return v4l2_subdev_call(vip->decoder, core, g_ctrl, ctrl);
> +}
> +
> +/**
> + * vidioc_s_ctl - set control value
> + * @file: descriptor of device (not used)
> + * @priv: points to current videodevice
> + * @ctrl: contains value to be set
> + *
> + * set value for a specific control
> + * return value: delivered by video DAC routine.
> + */
> +static int vidioc_s_ctrl(struct file *file, void *priv,
> + struct v4l2_control *ctrl)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return v4l2_subdev_call(vip->decoder, core, s_ctrl, ctrl);
> +}
> +
> +/**
> + * vidioc_enum_input - return name of input line
> + * @file: descriptor of device (not used)
> + * @priv: points to current videodevice
> + * @inp: contains return values
> + *
> + * the user friendly name of the input line is returned
> + *
> + * return value: 0, no error.
> + *
> + * -EINVAL, input line number out of range
> + */
> +static int vidioc_enum_input(struct file *file, void *priv,
> + struct v4l2_input *inp)
> +{
> + if (inp->index > 1)
> + return -EINVAL;
> +
> + inp->type = V4L2_INPUT_TYPE_CAMERA;
> + inp->std = V4L2_STD_ALL;
> + sprintf(inp->name, "Camera %u", inp->index);
> +
> + return 0;
> +}
> +
> +/**
> + * vidioc_s_input - set input line
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @i: new input line number
> + *
> + * the current active input line is set
> + *
> + * return value: 0, no error.
> + *
> + * -EINVAL, line number out of range
> + */
> +static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> + int ret;
> +
> + if (i > 1)
> + return -EINVAL;
> + ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0);
> +
> + if (!ret)
> + vip->input = i;
> +
> + return 0;
> +}
> +
> +/**
> + * vidioc_g_input - return input line
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @i: returned input line number
> + *
> + * the current active input line is returned
> + *
> + * return value: always 0.
> + */
> +static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + *i = vip->input;
> + return 0;
> +}
> +
> +/**
> + * vidioc_enum_fmt_vid_cap - return video capture format
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @f: returned format information
> + *
> + * returns name and format of video capture
> + * Only UYVY is supported by hardware.
> + *
> + * return value: always 0.
> + */
> +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> +
> + if (f->index != 0)
> + return -EINVAL;
> +
> + strcpy(f->description, "4:2:2, packed, UYVY");
> + f->pixelformat = V4L2_PIX_FMT_UYVY;
> + f->flags = 0;
> + return 0;
> +}
> +
> +/**
> + * vidioc_try_fmt_vid_cap - set video capture format
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @f: new format
> + *
> + * new video format is set which includes width and
> + * field type. width is fixed to 720, no scaling.
> + * Only UYVY is supported by this hardware.
> + * the minimum height is 200, the maximum is 576 (PAL)
> + *
> + * return value: 0, no error
> + *
> + * -EINVAL, pixel or field format not supported
> + *
> + */
> +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> + int interlace_lim;
> +
> + if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat)
> + return -EINVAL;
> +
> + if (V4L2_STD_NTSC & vip->std)
> + interlace_lim = 240;
> + else
> + interlace_lim = 288;
> +
> + switch (f->fmt.pix.field) {
> + case V4L2_FIELD_ANY:
> + if (interlace_lim < f->fmt.pix.height)
> + f->fmt.pix.field = V4L2_FIELD_INTERLACED;
> + else
> + f->fmt.pix.field = V4L2_FIELD_BOTTOM;
> + break;
> + case V4L2_FIELD_TOP:
> + case V4L2_FIELD_BOTTOM:
> + if (interlace_lim < f->fmt.pix.height)
> + f->fmt.pix.height = interlace_lim;
> + break;
> + case V4L2_FIELD_INTERLACED:
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + f->fmt.pix.height &= ~1;
> + if (2 * interlace_lim < f->fmt.pix.height)
> + f->fmt.pix.height = 2 * interlace_lim;
> + if (200 > f->fmt.pix.height)
> + f->fmt.pix.height = 200;
> + f->fmt.pix.width = 720;
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
> + f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height;
> + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
> + f->fmt.pix.priv = 0;
> + return 0;
> +}
> +
> +/**
> + * vidioc_s_fmt_vid_cap - set current video format parameters
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @f: returned format information
> + *
> + * set new capture format
> + * return value: 0, no error
> + *
> + * other, delivered by video DAC routine.
> + */
> +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> + int ret;
> +
> + ret = vidioc_try_fmt_vid_cap(file, priv, f);
> + if (ret)
> + return ret;
> +
> + memcpy(&vip->format, &f->fmt.pix, sizeof(struct v4l2_pix_format));
> + return 0;
> +}
> +
> +/**
> + * vidioc_g_fmt_vid_cap - get current video format parameters
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @f: contains format information
> + *
> + * returns current video format parameters
> + *
> + * return value: 0, always successful
> + */
> +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + memcpy(&f->fmt.pix, &vip->format, sizeof(struct v4l2_pix_format));
> + return 0;
> +}
> +
> +/**
> + * vidioc_reqfs - request buffer
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @p: video buffer
> + *
> + * Handling is done in generic videobuf layer.
> + */
> +static int vidioc_reqbufs(struct file *file, void *priv,
> + struct v4l2_requestbuffers *p)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_reqbufs(&vip->vb_vidq, p);
> +}
> +
> +/**
> + * vidioc_querybuf - query buffer
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @p: video buffer
> + *
> + * query buffer state.
> + * Handling is done in generic videobuf layer.
> + */
> +static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_querybuf(&vip->vb_vidq, p);
> +}
> +
> +/**
> + * vidioc_qbuf - queue a buffer
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @p: video buffer
> + *
> + * Handling is done in generic videobuf layer.
> + */
> +static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_qbuf(&vip->vb_vidq, p);
> +}
> +
> +/**
> + * vidioc_dqbuf - dequeue a buffer
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @p: video buffer
> + *
> + * Handling is done in generic videobuf layer.
> + */
> +static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_dqbuf(&vip->vb_vidq, p, file->f_flags & O_NONBLOCK);
> +}
> +
> +/**
> + * vidioc_streamon - turn on streaming
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @type: type of capture
> + *
> + * turn on streaming.
> + * Handling is done in generic videobuf layer.
> + */
> +static int vidioc_streamon(struct file *file, void *priv,
> + enum v4l2_buf_type type)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_streamon(&vip->vb_vidq);
> +}
> +
> +/**
> + * vidioc_streamoff - turn off streaming
> + * @file: descriptor of device ( not used)
> + * @priv: points to current videodevice
> + * @type: type of capture
> + *
> + * turn off streaming.
> + * Handling is done in generic videobuf layer.
> + */
> +static int vidioc_streamoff(struct file *file, void *priv,
> + enum v4l2_buf_type type)
> +{
> + struct video_device *dev = priv;
> + struct sta2x11_vip *vip = video_get_drvdata(dev);
> +
> + return videobuf_streamoff(&vip->vb_vidq);
> +}
> +
> +static const struct v4l2_file_operations vip_fops = {
> + .owner = THIS_MODULE,
> + .open = vip_open,
> + .release = vip_close,
> + .ioctl = video_ioctl2,
> + .read = vip_read,
> + .mmap = vip_mmap,
> + .poll = vip_poll
> +};
> +
> +static const struct v4l2_ioctl_ops vip_ioctl_ops = {
> + .vidioc_querycap = vidioc_querycap,
> + .vidioc_s_std = vidioc_s_std,
> + .vidioc_g_std = vidioc_g_std,
> + .vidioc_querystd = vidioc_querystd,
> + .vidioc_queryctrl = vidioc_queryctrl,
> + .vidioc_g_ctrl = vidioc_g_ctrl,
> + .vidioc_s_ctrl = vidioc_s_ctrl,
> + .vidioc_enum_input = vidioc_enum_input,
> + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
> + .vidioc_s_input = vidioc_s_input,
> + .vidioc_g_input = vidioc_g_input,
> + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
> + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
> + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
> + .vidioc_reqbufs = vidioc_reqbufs,
> + .vidioc_querybuf = vidioc_querybuf,
> + .vidioc_qbuf = vidioc_qbuf,
> + .vidioc_dqbuf = vidioc_dqbuf,
> + .vidioc_streamon = vidioc_streamon,
> + .vidioc_streamoff = vidioc_streamoff,
> +};
> +
> +static struct video_device video_dev_template = {
> + .name = DRV_NAME,
> + .release = video_device_release,
> + .fops = &vip_fops,
> + .ioctl_ops = &vip_ioctl_ops,
> + .tvnorms = V4L2_STD_ALL,
> +};
> +
> +/**
> + * vip_irq - interrupt routine
> + * @irq: Number of interrupt ( not used, correct number is assumed )
> + * @vip: local data structure containing all information
> + *
> + * check for both frame interrupts set ( top and bottom ).
> + * check FIFO overflow, but limit number of log messages after open.
> + * signal a complete buffer if done.
> + * dequeue a new buffer if available.
> + * disable VIP if no buffer available.
> + *
> + * return value: IRQ_NONE, interrupt was not generated by VIP
> + *
> + * IRQ_HANDLED, interrupt done.
> + */
> +static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip)
> +{
> + u32 status, dma;
> + unsigned long flags;
> + struct videobuf_buffer *vb;
> +
> + status = REG_READ(vip, DVP_ITS);
> +
> + if (!status) {
> + pr_debug("VIP: irq ignored\n");
> + return IRQ_NONE;
> + }
> +
> + if (!vip->started)
> + return IRQ_HANDLED;
> +
> + if (status & DVP_IT_VSB)
> + vip->bcount++;
> +
> + if (status & DVP_IT_VST)
> + vip->tcount++;
> +
> + if ((DVP_IT_VSB | DVP_IT_VST) == (status & (DVP_IT_VST | DVP_IT_VSB))) {
> + /* this is bad, we are too slow, hope the condition is gone
> + * on the next frame */
> + pr_info("VIP: both irqs\n");
> + return IRQ_HANDLED;
> + }
> +
> + if (status & DVP_IT_FIFO) {
> + if (5 > vip->overflow++)
> + pr_info("VIP: fifo overflow\n");
> + }
> +
> + if (2 > vip->tcount)
> + return IRQ_HANDLED;
> +
> + if (status & DVP_IT_VSB)
> + return IRQ_HANDLED;
> +
> + spin_lock_irqsave(&vip->slock, flags);
> +
> + REG_WRITE(vip, DVP_CTL, REG_READ(vip, DVP_CTL) & ~DVP_CTL_ENA);
> + if (vip->active) {
> + do_gettimeofday(&vip->active->ts);
> + vip->active->field_count++;
> + vip->active->state = VIDEOBUF_DONE;
> + wake_up(&vip->active->done);
> + vip->active = NULL;
> + }
> + if (!vip->closing) {
> + if (list_empty(&vip->capture))
> + goto done;
> +
> + vb = list_first_entry(&vip->capture, struct videobuf_buffer,
> + queue);
> + if (NULL == vb) {
> + pr_info("VIP: no buffer\n");
> + goto done;
> + }
> + vb->state = VIDEOBUF_ACTIVE;
> + list_del(&vb->queue);
> + vip->active = vb;
> + dma = videobuf_to_dma_contig(vb);
> + switch (vip->format.field) {
> + case V4L2_FIELD_INTERLACED:
> + REG_WRITE(vip, DVP_VTP, dma);
> + REG_WRITE(vip, DVP_VBP, dma + vip->format.width * 2);
> + break;
> + case V4L2_FIELD_TOP:
> + case V4L2_FIELD_BOTTOM:
> + REG_WRITE(vip, DVP_VTP, dma);
> + REG_WRITE(vip, DVP_VBP, dma);
> + break;
> + default:
> + pr_warning("VIP: unknown field format\n");
> + goto done;
> + break;
> + }
> + REG_WRITE(vip, DVP_CTL, REG_READ(vip, DVP_CTL) | DVP_CTL_ENA);
> + }
> +done:
> + spin_unlock_irqrestore(&vip->slock, flags);
> + return IRQ_HANDLED;
> +}
> +
> +/**
> + * vip_gpio_reserve - reserve gpio pin
> + * @dev: device
> + * @pin: GPIO pin number
> + * @dir: direction, input or output
> + * @name: GPIO pin name
> + *
> + */
> +static int vip_gpio_reserve(struct device *dev, int pin, int dir,
> + const char *name)
> +{
> + int ret;
> +
> + if (pin == -1)
> + return 0;
> +
> + ret = gpio_request(pin, name);
> + if (ret) {
> + dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name);
> + return ret;
> + }
> +
> + ret = gpio_direction_output(pin, dir);
> + if (ret) {
> + dev_err(dev, "Failed to set direction for pin %d (%s)\n",
> + pin, name);
> + gpio_free(pin);
> + return ret;
> + }
> +
> + ret = gpio_export(pin, false);
> + if (ret) {
> + dev_err(dev, "Failed to export pin %d (%s)\n", pin, name);
> + gpio_free(pin);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * vip_gpio_release - release gpio pin
> + * @dev: device
> + * @pin: GPIO pin number
> + * @name: GPIO pin name
> + *
> + */
> +static void vip_gpio_release(struct device *dev, int pin, const char *name)
> +{
> + if (pin != -1) {
> + dev_dbg(dev, "releasing pin %d (%s)\n", pin, name);
> + gpio_unexport(pin);
> + gpio_free(pin);
> + }
> +}
> +
> +/**
> + * sta2x11_vip_init_one - init one instance of video device
> + * @pdev: PCI device
> + * @ent: (not used)
> + *
> + * allocate reset pins for DAC.
> + * Reset video DAC, this is done via reset line.
> + * allocate memory for managing device
> + * request interrupt
> + * map IO region
> + * register device
> + * find and initialize video DAC
> + *
> + * return value: 0, no error
> + *
> + * -ENOMEM, no memory
> + *
> + * -ENODEV, device could not be detected or registered
> + */
> +static int __devinit sta2x11_vip_init_one(struct pci_dev *pdev,
> + const struct pci_device_id *ent)
> +{
> + int ret;
> + struct sta2x11_vip *vip;
> + struct vip_config *config;
> +
> + ret = pci_enable_device(pdev);
> + if (ret)
> + return ret;
> +
> + config = dev_get_platdata(&pdev->dev);
> + if (!config) {
> + dev_info(&pdev->dev, "VIP slot disabled\n");
> + ret = -EINVAL;
> + goto disable;
> + }
> +
> + ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0,
> + config->pwr_name);
> + if (ret)
> + goto disable;
> +
> + if (config->reset_pin >= 0) {
> + ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0,
> + config->reset_name);
> + if (ret) {
> + vip_gpio_release(&pdev->dev, config->pwr_pin,
> + config->pwr_name);
> + goto disable;
> + }
> + }
> +
> + if (config->pwr_pin != -1) {
> + /* Datasheet says 5ms between PWR and RST */
> + usleep_range(5000, 25000);
> + ret = gpio_direction_output(config->pwr_pin, 1);
> + }
> +
> + if (config->reset_pin != -1) {
> + /* Datasheet says 5ms between PWR and RST */
> + usleep_range(5000, 25000);
> + ret = gpio_direction_output(config->reset_pin, 1);
> + }
> + usleep_range(5000, 25000);
> +
> + vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL);
> + if (!vip) {
> + ret = -ENOMEM;
> + goto release_gpios;
> + }
> +
> + vip->pdev = pdev;
> + vip->std = V4L2_STD_PAL;
> + vip->format = formats_50[0];
> + vip->config = config;
> +
> + if (v4l2_device_register(&pdev->dev, &vip->v4l2_dev))
> + goto free_mem;
> +
> + dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n",
> + (unsigned long)pci_resource_start(pdev, 0),
> + (unsigned long)pci_resource_len(pdev, 0), pdev->irq);
> +
> + pci_set_master(pdev);
> +
> + ret = pci_request_regions(pdev, DRV_NAME);
> + if (ret)
> + goto unreg;
> +
> + vip->iomem = pci_iomap(pdev, 0, 0x100);
> + if (!vip->iomem) {
> + ret = -ENOMEM; /* FIXME */
> + goto release;
> + }
> +
> + pci_enable_msi(pdev);
> +
> + INIT_LIST_HEAD(&vip->capture);
> + spin_lock_init(&vip->slock);
> + mutex_init(&vip->mutex);
> + vip->started = 0;
> + vip->disabled = 0;
> +
> + ret = request_irq(pdev->irq,
> + (irq_handler_t) vip_irq,
> + IRQF_SHARED, DRV_NAME, vip);
> + if (ret) {
> + dev_err(&pdev->dev, "request_irq failed\n");
> + ret = -ENODEV;
> + goto unmap;
> + }
> +
> + vip->video_dev = video_device_alloc();
> + if (!vip->video_dev) {
> + ret = -ENOMEM;
> + goto release_irq;
> + }
> +
> + *(vip->video_dev) = video_dev_template;
> + video_set_drvdata(vip->video_dev, vip);
> +
> + ret = video_register_device(vip->video_dev, VFL_TYPE_GRABBER, -1);
> + if (ret)
> + goto vrelease;
> +
> + vip->adapter = i2c_get_adapter(vip->config->i2c_id);
> + if (!vip->adapter) {
> + ret = -ENODEV;
> + dev_err(&pdev->dev, "no I2C adapter found\n");
> + goto vunreg;
> + }
> +
> + vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter,
> + "adv7180", vip->config->i2c_addr,
> + NULL);
> + if (!vip->decoder) {
> + ret = -ENODEV;
> + dev_err(&pdev->dev, "no decoder found\n");
> + goto vunreg;
> + }
> +
> + i2c_put_adapter(vip->adapter);
> +
> + v4l2_subdev_call(vip->decoder, core, init, 0);
> +
> + pr_info("STA2X11 Video Input Port (VIP) loaded\n");
> + return 0;
> +
> +vunreg:
> + video_set_drvdata(vip->video_dev, NULL);
> +vrelease:
> + if (video_is_registered(vip->video_dev))
> + video_unregister_device(vip->video_dev);
> + else
> + video_device_release(vip->video_dev);
> +release_irq:
> + free_irq(pdev->irq, vip);
> + pci_disable_msi(pdev);
> +unmap:
> + pci_iounmap(pdev, vip->iomem);
> + mutex_destroy(&vip->mutex);
> +release:
> + pci_release_regions(pdev);
> +unreg:
> + v4l2_device_unregister(&vip->v4l2_dev);
> +free_mem:
> + kfree(vip);
> +release_gpios:
> + vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name);
> + vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name);
> +disable:
> + /*
> + * do not call pci_disable_device on sta2x11 because it break all
> + * other Bus masters on this EP
> + */
> + return ret;
> +}
> +
> +/**
> + * sta2x11_vip_remove_one - release device
> + * @pdev: PCI device
> + *
> + * Undo everything done in .._init_one
> + *
> + * unregister video device
> + * free interrupt
> + * unmap ioadresses
> + * free memory
> + * free GPIO pins
> + */
> +static void __devexit sta2x11_vip_remove_one(struct pci_dev *pdev)
> +{
> + struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
> + struct sta2x11_vip *vip =
> + container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
> +
> + video_set_drvdata(vip->video_dev, NULL);
> + video_unregister_device(vip->video_dev);
> + /*do not call video_device_release() here, is already done */
> + free_irq(pdev->irq, vip);
> + pci_disable_msi(pdev);
> + pci_iounmap(pdev, vip->iomem);
> + pci_release_regions(pdev);
> +
> + v4l2_device_unregister(&vip->v4l2_dev);
> + mutex_destroy(&vip->mutex);
> +
> + vip_gpio_release(&pdev->dev, vip->config->pwr_pin,
> + vip->config->pwr_name);
> + vip_gpio_release(&pdev->dev, vip->config->reset_pin,
> + vip->config->reset_name);
> +
> + kfree(vip);
> + /*
> + * do not call pci_disable_device on sta2x11 because it break all
> + * other Bus masters on this EP
> + */
> +}
> +
> +#ifdef CONFIG_PM
> +
> +/**
> + * sta2x11_vip_suspend - set device into power save mode
> + * @pdev: PCI device
> + * @state: new state of device
> + *
> + * all relevant registers are saved and an attempt to set a new state is made.
> + *
> + * return value: 0 always indicate success,
> + * even if device could not be disabled. (workaround for hardware problem)
> + *
> + * reurn value : 0, always succesful, even if hardware does not not support
> + * power down mode.
> + */
> +static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state)
> +{
> + struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
> + struct sta2x11_vip *vip =
> + container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
> + unsigned long flags;
> + int i;
> +
> + spin_lock_irqsave(&vip->slock, flags);
> + vip->register_save_area[0] = REG_READ(vip, DVP_CTL);
> + REG_WRITE(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS);
> + vip->register_save_area[SAVE_COUNT] = REG_READ(vip, DVP_ITM);
> + REG_WRITE(vip, DVP_ITM, 0);
> + for (i = 1; i < SAVE_COUNT; i++)
> + vip->register_save_area[i] = REG_READ(vip, 4 * i);
> + for (i = 0; i < AUX_COUNT; i++)
> + vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] =
> + REG_READ(vip, registers_to_save[i]);
> + spin_unlock_irqrestore(&vip->slock, flags);
> + /* save pci state */
> + pci_save_state(pdev);
> + if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) {
> + /*
> + * do not call pci_disable_device on sta2x11 because it
> + * break all other Bus masters on this EP
> + */
> + vip->disabled = 1;
> + }
> +
> + pr_info("VIP: suspend\n");
> + return 0;
> +}
> +
> +/**
> + * sta2x11_vip_resume - resume device operation
> + * @pdev : PCI device
> + *
> + * re-enable device, set PCI state to powered and restore registers.
> + * resume normal device operation afterwards.
> + *
> + * return value: 0, no error.
> + *
> + * other, could not set device to power on state.
> + */
> +static int sta2x11_vip_resume(struct pci_dev *pdev)
> +{
> + struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
> + struct sta2x11_vip *vip =
> + container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
> + unsigned long flags;
> + int ret, i;
> +
> + pr_info("VIP: resume\n");
> + /* restore pci state */
> + if (vip->disabled) {
> + ret = pci_enable_device(pdev);
> + if (ret) {
> + pr_warning("VIP: Can't enable device.\n");
> + return ret;
> + }
> + vip->disabled = 0;
> + }
> + ret = pci_set_power_state(pdev, PCI_D0);
> + if (ret) {
> + /*
> + * do not call pci_disable_device on sta2x11 because it
> + * break all other Bus masters on this EP
> + */
> + pr_warning("VIP: Can't enable device.\n");
> + vip->disabled = 1;
> + return ret;
> + }
> +
> + pci_restore_state(pdev);
> +
> + spin_lock_irqsave(&vip->slock, flags);
> + for (i = 1; i < SAVE_COUNT; i++)
> + REG_WRITE(vip, 4 * i, vip->register_save_area[i]);
> + for (i = 0; i < AUX_COUNT; i++)
> + REG_WRITE(vip, registers_to_save[i],
> + vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]);
> + REG_WRITE(vip, DVP_CTL, vip->register_save_area[0]);
> + REG_WRITE(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]);
> + spin_unlock_irqrestore(&vip->slock, flags);
> + return 0;
> +}
> +
> +#endif
> +
> +static DEFINE_PCI_DEVICE_TABLE(sta2x11_vip_pci_tbl) = {
> + {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)},
> + {0,}
> +};
> +
> +static struct pci_driver sta2x11_vip_driver = {
> + .name = DRV_NAME,
> + .probe = sta2x11_vip_init_one,
> + .remove = __devexit_p(sta2x11_vip_remove_one),
> + .id_table = sta2x11_vip_pci_tbl,
> +#ifdef CONFIG_PM
> + .suspend = sta2x11_vip_suspend,
> + .resume = sta2x11_vip_resume,
> +#endif
> +};
> +
> +static int __init sta2x11_vip_init_module(void)
> +{
> + return pci_register_driver(&sta2x11_vip_driver);
> +}
> +
> +static void __exit sta2x11_vip_exit_module(void)
> +{
> + pci_unregister_driver(&sta2x11_vip_driver);
> +}
> +
> +#ifdef MODULE
> +module_init(sta2x11_vip_init_module);
> +module_exit(sta2x11_vip_exit_module);
> +#else
> +late_initcall_sync(sta2x11_vip_init_module);
> +#endif
> +
> +MODULE_DESCRIPTION("STA2X11 Video Input Port driver");
> +MODULE_AUTHOR("Wind River");
> +MODULE_LICENSE("GPL v2");
> +MODULE_SUPPORTED_DEVICE("sta2x11 video input");
> +MODULE_VERSION(DRV_VERSION);
> +MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl);
> diff --git a/drivers/media/video/sta2x11_vip.h b/drivers/media/video/sta2x11_vip.h
> new file mode 100644
> index 0000000..4f81a13
> --- /dev/null
> +++ b/drivers/media/video/sta2x11_vip.h
> @@ -0,0 +1,40 @@
> +/*
> + * Copyright (c) 2011 Wind River Systems, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> + * See the GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + *
> + * Author: Anders Wallin <anders.wallin@windriver.com>
> + *
> + */
> +
> +#ifndef __STA2X11_VIP_H
> +#define __STA2X11_VIP_H
> +
> +/**
> + * struct vip_config - video input configuration data
> + * @pwr_name: ADV powerdown name
> + * @pwr_pin: ADV powerdown pin
> + * @reset_name: ADV reset name
> + * @reset_pin: ADV reset pin
> + */
> +struct vip_config {
> + const char *pwr_name;
> + int pwr_pin;
> + const char *reset_name;
> + int reset_pin;
> + int i2c_id;
> + int i2c_addr;
> +};
> +
> +#endif /* __STA2X11_VIP_H */
>