--- /dev/null
+/*
+ * 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 *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 void 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);
+
+ if (vb2_is_streaming(vb->vb2_queue))
+ vip_active_buf_next(vip);
+}
+
+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 void 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);
+}
+
+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, video, 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, video, 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;
+ 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_empty,
+ .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;
+ }
+
+ /* Initialize and register video device */
+ vip->video_dev = video_dev_template;
+ vip->video_dev.v4l2_dev = &vip->v4l2_dev;
+ vip->video_dev.queue = &vip->vb_vidq;
+ 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:
+ video_unregister_device(&vip->video_dev);
+ 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);
+ 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 const struct pci_device_id 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);
Code Review / kvmfornfv.git / blobdiff