linux_dsm_epyc7002/drivers/media/pci/sta2x11/sta2x11_vip.c
Wei Yongjun d017650b40 [media] sta2x11_vip: fix error return code in sta2x11_vip_init_one()
The orig code will release all the resources if v4l2_device_register()
failed and return 0. But what we need in this case is to return an
negative error code to let the caller known we are failed.
So the patch save the return value of v4l2_device_register() to 'ret'
and return it when error.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2013-05-27 08:51:45 -03:00

1345 lines
33 KiB
C

/*
* This is the driver for the STA2x11 Video Input Port.
*
* Copyright (C) 2012 ST Microelectronics
* author: Federico Vaga <federico.vaga@gmail.com>
* Copyright (C) 2010 WindRiver Systems, Inc.
* authors: Andreas Kies <andreas.kies@windriver.com>
* Vlad Lungu <vlad.lungu@windriver.com>
*
* 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".
*
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/videodev2.h>
#include <linux/kmod.h>
#include <linux/pci.h>
#include <linux/interrupt.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-ctrls.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/videobuf2-dma-contig.h>
#include "sta2x11_vip.h"
#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 SAVE_COUNT 8
#define AUX_COUNT 3
#define IRQ_COUNT 1
struct vip_buffer {
struct vb2_buffer vb;
struct list_head list;
dma_addr_t dma;
};
static inline struct vip_buffer *to_vip_buffer(struct vb2_buffer *vb2)
{
return container_of(vb2, struct vip_buffer, vb);
}
/**
* 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
* @ctrl_hdl: handler for control framework
* @format: pixel format, fixed UYVY
* @std: video standard (e.g. PAL/NTSC)
* @input: input line for video signal ( 0 or 1 )
* @disabled: Device is in power down state
* @slock: for excluse acces of registers
* @alloc_ctx: context for videobuf2
* @vb_vidq: queue maintained by videobuf2 layer
* @buffer_list: list of buffer in use
* @sequence: sequence number of acquired buffer
* @active: current active buffer
* @lock: used in videobuf2 callback
* @tcount: Number of top frames
* @bcount: Number of bottom frames
* @overflow: Number of FIFO overflows
* @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_ctrl_handler ctrl_hdl;
struct v4l2_pix_format format;
v4l2_std_id std;
unsigned int input;
int disabled;
spinlock_t slock;
struct vb2_alloc_ctx *alloc_ctx;
struct vb2_queue vb_vidq;
struct list_head buffer_list;
unsigned int sequence;
struct vip_buffer *active; /* current active buffer */
spinlock_t lock; /* Used in videobuf2 callback */
/* Interrupt counters */
int tcount, bcount;
int overflow;
void *iomem; /* I/O Memory */
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},
};
/* Write VIP register */
static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val)
{
iowrite32((val), (vip->iomem)+(reg));
}
/* Read VIP register */
static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg)
{
return ioread32((vip->iomem)+(reg));
}
/* Start DMA acquisition */
static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf)
{
unsigned long offset = 0;
if (vip->format.field == V4L2_FIELD_INTERLACED)
offset = vip->format.width * 2;
spin_lock_irq(&vip->slock);
/* Enable acquisition */
reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA);
/* Set Top and Bottom Field memory address */
reg_write(vip, DVP_VTP, (u32)vip_buf->dma);
reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset);
spin_unlock_irq(&vip->slock);
}
/* Fetch the next buffer to activate */
static void vip_active_buf_next(struct sta2x11_vip *vip)
{
/* Get the next buffer */
spin_lock(&vip->lock);
if (list_empty(&vip->buffer_list)) {/* No available buffer */
spin_unlock(&vip->lock);
return;
}
vip->active = list_first_entry(&vip->buffer_list,
struct vip_buffer,
list);
/* Reset Top and Bottom counter */
vip->tcount = 0;
vip->bcount = 0;
spin_unlock(&vip->lock);
if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */
start_dma(vip, vip->active); /* start dma capture */
}
}
/* Videobuf2 Operations */
static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
if (!(*nbuffers) || *nbuffers < MAX_FRAMES)
*nbuffers = MAX_FRAMES;
*nplanes = 1;
sizes[0] = vip->format.sizeimage;
alloc_ctxs[0] = vip->alloc_ctx;
vip->sequence = 0;
vip->active = NULL;
vip->tcount = 0;
vip->bcount = 0;
return 0;
};
static int buffer_init(struct vb2_buffer *vb)
{
struct vip_buffer *vip_buf = to_vip_buffer(vb);
vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0);
INIT_LIST_HEAD(&vip_buf->list);
return 0;
}
static int buffer_prepare(struct vb2_buffer *vb)
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
struct vip_buffer *vip_buf = to_vip_buffer(vb);
unsigned long size;
size = vip->format.sizeimage;
if (vb2_plane_size(vb, 0) < size) {
v4l2_err(&vip->v4l2_dev, "buffer too small (%lu < %lu)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(&vip_buf->vb, 0, size);
return 0;
}
static void buffer_queue(struct vb2_buffer *vb)
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
struct vip_buffer *vip_buf = to_vip_buffer(vb);
spin_lock(&vip->lock);
list_add_tail(&vip_buf->list, &vip->buffer_list);
if (!vip->active) { /* No active buffer, active the first one */
vip->active = list_first_entry(&vip->buffer_list,
struct vip_buffer,
list);
if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */
start_dma(vip, vip_buf); /* start dma capture */
}
spin_unlock(&vip->lock);
}
static int buffer_finish(struct vb2_buffer *vb)
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
struct vip_buffer *vip_buf = to_vip_buffer(vb);
/* Buffer handled, remove it from the list */
spin_lock(&vip->lock);
list_del_init(&vip_buf->list);
spin_unlock(&vip->lock);
vip_active_buf_next(vip);
return 0;
}
static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
spin_lock_irq(&vip->slock);
/* Enable interrupt VSYNC Top and Bottom*/
reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST);
spin_unlock_irq(&vip->slock);
if (count)
start_dma(vip, vip->active);
return 0;
}
/* abort streaming and wait for last buffer */
static int stop_streaming(struct vb2_queue *vq)
{
struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
struct vip_buffer *vip_buf, *node;
/* Disable acquisition */
reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
/* Disable all interrupts */
reg_write(vip, DVP_ITM, 0);
/* Release all active buffers */
spin_lock(&vip->lock);
list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) {
vb2_buffer_done(&vip_buf->vb, VB2_BUF_STATE_ERROR);
list_del(&vip_buf->list);
}
spin_unlock(&vip->lock);
return 0;
}
static struct vb2_ops vip_video_qops = {
.queue_setup = queue_setup,
.buf_init = buffer_init,
.buf_prepare = buffer_prepare,
.buf_finish = buffer_finish,
.buf_queue = buffer_queue,
.start_streaming = start_streaming,
.stop_streaming = stop_streaming,
};
/* File Operations */
static const struct v4l2_file_operations vip_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = vb2_fop_release,
.unlocked_ioctl = video_ioctl2,
.read = vb2_fop_read,
.mmap = vb2_fop_mmap,
.poll = vb2_fop_poll
};
/**
* vidioc_querycap - return capabilities of device
* @file: descriptor of device
* @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 sta2x11_vip *vip = video_drvdata(file);
strcpy(cap->driver, KBUILD_MODNAME);
strcpy(cap->card, KBUILD_MODNAME);
snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
pci_name(vip->pdev));
cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
/**
* vidioc_s_std - set video standard
* @file: descriptor of device
* @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 sta2x11_vip *vip = video_drvdata(file);
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
* @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 sta2x11_vip *vip = video_drvdata(file);
*std = vip->std;
return 0;
}
/**
* vidioc_querystd - get possible video standards
* @file: descriptor of device
* @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 sta2x11_vip *vip = video_drvdata(file);
return v4l2_subdev_call(vip->decoder, video, querystd, std);
}
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
* @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 sta2x11_vip *vip = video_drvdata(file);
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
* @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 sta2x11_vip *vip = video_drvdata(file);
*i = vip->input;
return 0;
}
/**
* vidioc_enum_fmt_vid_cap - return video capture format
* @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
* @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 sta2x11_vip *vip = video_drvdata(file);
int interlace_lim;
if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) {
v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n");
return -EINVAL;
}
if (V4L2_STD_525_60 & vip->std)
interlace_lim = 240;
else
interlace_lim = 288;
switch (f->fmt.pix.field) {
default:
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;
}
/* It is the only supported format */
f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
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
* @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 sta2x11_vip *vip = video_drvdata(file);
unsigned int t_stop, b_stop, pitch;
int ret;
ret = vidioc_try_fmt_vid_cap(file, priv, f);
if (ret)
return ret;
if (vb2_is_busy(&vip->vb_vidq)) {
/* Can't change format during acquisition */
v4l2_err(&vip->v4l2_dev, "device busy\n");
return -EBUSY;
}
vip->format = f->fmt.pix;
switch (vip->format.field) {
case V4L2_FIELD_INTERLACED:
t_stop = ((vip->format.height / 2 - 1) << 16) |
(2 * vip->format.width - 1);
b_stop = t_stop;
pitch = 4 * vip->format.width;
break;
case V4L2_FIELD_TOP:
t_stop = ((vip->format.height - 1) << 16) |
(2 * vip->format.width - 1);
b_stop = (0 << 16) | (2 * vip->format.width - 1);
pitch = 2 * vip->format.width;
break;
case V4L2_FIELD_BOTTOM:
t_stop = (0 << 16) | (2 * vip->format.width - 1);
b_stop = (vip->format.height << 16) |
(2 * vip->format.width - 1);
pitch = 2 * vip->format.width;
break;
default:
v4l2_err(&vip->v4l2_dev, "unknown field format\n");
return -EINVAL;
}
spin_lock_irq(&vip->slock);
/* Y-X Top Field Offset */
reg_write(vip, DVP_TFO, 0);
/* Y-X Bottom Field Offset */
reg_write(vip, DVP_BFO, 0);
/* Y-X Top Field Stop*/
reg_write(vip, DVP_TFS, t_stop);
/* Y-X Bottom Field Stop */
reg_write(vip, DVP_BFS, b_stop);
/* Video Memory Pitch */
reg_write(vip, DVP_VMP, pitch);
spin_unlock_irq(&vip->slock);
return 0;
}
/**
* vidioc_g_fmt_vid_cap - get current video format parameters
* @file: descriptor of device
* @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 sta2x11_vip *vip = video_drvdata(file);
f->fmt.pix = vip->format;
return 0;
}
static const struct v4l2_ioctl_ops vip_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
/* FMT handling */
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
/* Buffer handlers */
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
/* Stream on/off */
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
/* Standard handling */
.vidioc_g_std = vidioc_g_std,
.vidioc_s_std = vidioc_s_std,
.vidioc_querystd = vidioc_querystd,
/* Input handling */
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
/* Log status ioctl */
.vidioc_log_status = v4l2_ctrl_log_status,
/* Event handling */
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static struct video_device video_dev_template = {
.name = KBUILD_MODNAME,
.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
*
* 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)
{
unsigned int status;
status = reg_read(vip, DVP_ITS);
if (!status) /* No interrupt to handle */
return IRQ_NONE;
if (status & DVP_IT_FIFO)
if (vip->overflow++ > 5)
pr_info("VIP: fifo overflow\n");
if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) {
/* this is bad, we are too slow, hope the condition is gone
* on the next frame */
return IRQ_HANDLED;
}
if (status & DVP_IT_VST)
if ((++vip->tcount) < 2)
return IRQ_HANDLED;
if (status & DVP_IT_VSB) {
vip->bcount++;
return IRQ_HANDLED;
}
if (vip->active) { /* Acquisition is over on this buffer */
/* Disable acquisition */
reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
/* Remove the active buffer from the list */
do_gettimeofday(&vip->active->vb.v4l2_buf.timestamp);
vip->active->vb.v4l2_buf.sequence = vip->sequence++;
vb2_buffer_done(&vip->active->vb, VB2_BUF_STATE_DONE);
}
return IRQ_HANDLED;
}
static void sta2x11_vip_init_register(struct sta2x11_vip *vip)
{
/* Register initialization */
spin_lock_irq(&vip->slock);
/* Clean interrupt */
reg_read(vip, DVP_ITS);
/* Enable Half Line per vertical */
reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD);
/* Reset VIP control */
reg_write(vip, DVP_CTL, DVP_CTL_RST);
/* Clear VIP control */
reg_write(vip, DVP_CTL, 0);
spin_unlock_irq(&vip->slock);
}
static void sta2x11_vip_clear_register(struct sta2x11_vip *vip)
{
spin_lock_irq(&vip->slock);
/* Disable interrupt */
reg_write(vip, DVP_ITM, 0);
/* Reset VIP Control */
reg_write(vip, DVP_CTL, DVP_CTL_RST);
/* Clear VIP Control */
reg_write(vip, DVP_CTL, 0);
/* Clean VIP Interrupt */
reg_read(vip, DVP_ITS);
spin_unlock_irq(&vip->slock);
}
static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip)
{
int err;
err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29));
if (err) {
v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask");
return err;
}
memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue));
vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ;
vip->vb_vidq.drv_priv = vip;
vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer);
vip->vb_vidq.ops = &vip_video_qops;
vip->vb_vidq.mem_ops = &vb2_dma_contig_memops;
err = vb2_queue_init(&vip->vb_vidq);
if (err)
return err;
INIT_LIST_HEAD(&vip->buffer_list);
spin_lock_init(&vip->lock);
vip->alloc_ctx = vb2_dma_contig_init_ctx(&vip->pdev->dev);
if (IS_ERR(vip->alloc_ctx)) {
v4l2_err(&vip->v4l2_dev, "Can't allocate buffer context");
return PTR_ERR(vip->alloc_ctx);
}
return 0;
}
static void sta2x11_vip_release_buffer(struct sta2x11_vip *vip)
{
vb2_dma_contig_cleanup_ctx(vip->alloc_ctx);
}
static int sta2x11_vip_init_controls(struct sta2x11_vip *vip)
{
/*
* Inititialize an empty control so VIP can inerithing controls
* from ADV7180
*/
v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0);
vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl;
if (vip->ctrl_hdl.error) {
int err = vip->ctrl_hdl.error;
v4l2_ctrl_handler_free(&vip->ctrl_hdl);
return err;
}
return 0;
}
/**
* 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 sta2x11_vip_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret;
struct sta2x11_vip *vip;
struct vip_config *config;
/* Check if hardware support 26-bit DMA */
if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) {
dev_err(&pdev->dev, "26-bit DMA addressing not available\n");
return -EINVAL;
}
/* Enable PCI */
ret = pci_enable_device(pdev);
if (ret)
return ret;
/* Get VIP platform data */
config = dev_get_platdata(&pdev->dev);
if (!config) {
dev_info(&pdev->dev, "VIP slot disabled\n");
ret = -EINVAL;
goto disable;
}
/* Power configuration */
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);
/* Allocate a new VIP instance */
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;
ret = sta2x11_vip_init_controls(vip);
if (ret)
goto free_mem;
ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev);
if (ret)
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, KBUILD_MODNAME);
if (ret)
goto unreg;
vip->iomem = pci_iomap(pdev, 0, 0x100);
if (!vip->iomem) {
ret = -ENOMEM;
goto release;
}
pci_enable_msi(pdev);
/* Initialize buffer */
ret = sta2x11_vip_init_buffer(vip);
if (ret)
goto unmap;
spin_lock_init(&vip->slock);
ret = request_irq(pdev->irq,
(irq_handler_t) vip_irq,
IRQF_SHARED, KBUILD_MODNAME, vip);
if (ret) {
dev_err(&pdev->dev, "request_irq failed\n");
ret = -ENODEV;
goto release_buf;
}
/* Alloc, initialize and register video device */
vip->video_dev = video_device_alloc();
if (!vip->video_dev) {
ret = -ENOMEM;
goto release_irq;
}
vip->video_dev = &video_dev_template;
vip->video_dev->v4l2_dev = &vip->v4l2_dev;
vip->video_dev->queue = &vip->vb_vidq;
set_bit(V4L2_FL_USE_FH_PRIO, &vip->video_dev->flags);
video_set_drvdata(vip->video_dev, vip);
ret = video_register_device(vip->video_dev, VFL_TYPE_GRABBER, -1);
if (ret)
goto vrelease;
/* Get ADV7180 subdevice */
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);
sta2x11_vip_init_register(vip);
dev_info(&pdev->dev, "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);
release_buf:
sta2x11_vip_release_buffer(vip);
pci_disable_msi(pdev);
unmap:
vb2_queue_release(&vip->vb_vidq);
pci_iounmap(pdev, vip->iomem);
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 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);
sta2x11_vip_clear_register(vip);
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);
vb2_queue_release(&vip->vb_vidq);
pci_iounmap(pdev, vip->iomem);
pci_release_regions(pdev);
v4l2_device_unregister(&vip->v4l2_dev);
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)
*/
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_warn("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_warn("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 = KBUILD_MODNAME,
.probe = sta2x11_vip_init_one,
.remove = 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);