Staging
v0.8.1
v0.8.1
https://github.com/torvalds/linux
Tip revision: 29594404d7fe73cd80eaa4ee8c43dcc53970c60e authored by Linus Torvalds on 11 December 2012, 03:30:57 UTC
Linux 3.7
Linux 3.7
Tip revision: 2959440
sta2x11_vip.c
/*
* 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_525_60 & (*std))
vip->format = formats_60[0];
else
vip->format = formats_50[0];
}
return 0;
}
if (oldstd != *std) {
if (V4L2_STD_525_60 & (*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_525_60 & 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);
