--- /dev/null
+/*
+ * 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);
projects / openwrt / staging / blogic.git / commitdiff