/*
* SoC-camera host driver for Renesas R-Car VIN unit
*
* Copyright (C) 2011-2013 Renesas Solutions Corp.
* Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
*
* Based on V4L2 Driver for SuperH Mobile CEU interface "sh_mobile_ceu_camera.c"
*
* Copyright (C) 2008 Magnus Damm
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_data/camera-rcar.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/soc_camera.h>
#include <media/soc_mediabus.h>
#include <media/v4l2-common.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-mediabus.h>
#include <media/v4l2-subdev.h>
#include <media/videobuf2-dma-contig.h>
#include "soc_scale_crop.h"
#define DRV_NAME "rcar_vin"
/* Register offsets for R-Car VIN */
#define VNMC_REG 0x00 /* Video n Main Control Register */
#define VNMS_REG 0x04 /* Video n Module Status Register */
#define VNFC_REG 0x08 /* Video n Frame Capture Register */
#define VNSLPRC_REG 0x0C /* Video n Start Line Pre-Clip Register */
#define VNELPRC_REG 0x10 /* Video n End Line Pre-Clip Register */
#define VNSPPRC_REG 0x14 /* Video n Start Pixel Pre-Clip Register */
#define VNEPPRC_REG 0x18 /* Video n End Pixel Pre-Clip Register */
#define VNSLPOC_REG 0x1C /* Video n Start Line Post-Clip Register */
#define VNELPOC_REG 0x20 /* Video n End Line Post-Clip Register */
#define VNSPPOC_REG 0x24 /* Video n Start Pixel Post-Clip Register */
#define VNEPPOC_REG 0x28 /* Video n End Pixel Post-Clip Register */
#define VNIS_REG 0x2C /* Video n Image Stride Register */
#define VNMB_REG(m) (0x30 + ((m) << 2)) /* Video n Memory Base m Register */
#define VNIE_REG 0x40 /* Video n Interrupt Enable Register */
#define VNINTS_REG 0x44 /* Video n Interrupt Status Register */
#define VNSI_REG 0x48 /* Video n Scanline Interrupt Register */
#define VNMTC_REG 0x4C /* Video n Memory Transfer Control Register */
#define VNYS_REG 0x50 /* Video n Y Scale Register */
#define VNXS_REG 0x54 /* Video n X Scale Register */
#define VNDMR_REG 0x58 /* Video n Data Mode Register */
#define VNDMR2_REG 0x5C /* Video n Data Mode Register 2 */
#define VNUVAOF_REG 0x60 /* Video n UV Address Offset Register */
/* Register bit fields for R-Car VIN */
/* Video n Main Control Register bits */
#define VNMC_FOC (1 << 21)
#define VNMC_YCAL (1 << 19)
#define VNMC_INF_YUV8_BT656 (0 << 16)
#define VNMC_INF_YUV8_BT601 (1 << 16)
#define VNMC_INF_YUV16 (5 << 16)
#define VNMC_VUP (1 << 10)
#define VNMC_IM_ODD (0 << 3)
#define VNMC_IM_ODD_EVEN (1 << 3)
#define VNMC_IM_EVEN (2 << 3)
#define VNMC_IM_FULL (3 << 3)
#define VNMC_BPS (1 << 1)
#define VNMC_ME (1 << 0)
/* Video n Module Status Register bits */
#define VNMS_FBS_MASK (3 << 3)
#define VNMS_FBS_SHIFT 3
#define VNMS_AV (1 << 1)
#define VNMS_CA (1 << 0)
/* Video n Frame Capture Register bits */
#define VNFC_C_FRAME (1 << 1)
#define VNFC_S_FRAME (1 << 0)
/* Video n Interrupt Enable Register bits */
#define VNIE_FIE (1 << 4)
#define VNIE_EFE (1 << 1)
/* Video n Data Mode Register bits */
#define VNDMR_EXRGB (1 << 8)
#define VNDMR_BPSM (1 << 4)
#define VNDMR_DTMD_YCSEP (1 << 1)
#define VNDMR_DTMD_ARGB1555 (1 << 0)
/* Video n Data Mode Register 2 bits */
#define VNDMR2_VPS (1 << 30)
#define VNDMR2_HPS (1 << 29)
#define VNDMR2_FTEV (1 << 17)
#define VIN_MAX_WIDTH 2048
#define VIN_MAX_HEIGHT 2048
enum chip_id {
RCAR_H2,
RCAR_H1,
RCAR_M1,
RCAR_E1,
};
enum rcar_vin_state {
STOPPED = 0,
RUNNING,
STOPPING,
};
struct rcar_vin_priv {
void __iomem *base;
spinlock_t lock;
int sequence;
/* State of the VIN module in capturing mode */
enum rcar_vin_state state;
struct rcar_vin_platform_data *pdata;
struct soc_camera_host ici;
struct list_head capture;
#define MAX_BUFFER_NUM 3
struct vb2_buffer *queue_buf[MAX_BUFFER_NUM];
struct vb2_alloc_ctx *alloc_ctx;
enum v4l2_field field;
unsigned int vb_count;
unsigned int nr_hw_slots;
bool request_to_stop;
struct completion capture_stop;
enum chip_id chip;
};
#define is_continuous_transfer(priv) (priv->vb_count > MAX_BUFFER_NUM)
struct rcar_vin_buffer {
struct vb2_buffer vb;
struct list_head list;
};
#define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \
struct rcar_vin_buffer, \
vb)->list)
struct rcar_vin_cam {
/* VIN offsets within the camera output, before the VIN scaler */
unsigned int vin_left;
unsigned int vin_top;
/* Client output, as seen by the VIN */
unsigned int width;
unsigned int height;
/*
* User window from S_CROP / G_CROP, produced by client cropping and
* scaling, VIN scaling and VIN cropping, mapped back onto the client
* input window
*/
struct v4l2_rect subrect;
/* Camera cropping rectangle */
struct v4l2_rect rect;
const struct soc_mbus_pixelfmt *extra_fmt;
};
/*
* .queue_setup() is called to check whether the driver can accept the requested
* number of buffers and to fill in plane sizes for the current frame format if
* required
*/
static int rcar_vin_videobuf_setup(struct vb2_queue *vq,
const struct v4l2_format *fmt,
unsigned int *count,
unsigned int *num_planes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
if (fmt) {
const struct soc_camera_format_xlate *xlate;
unsigned int bytes_per_line;
int ret;
xlate = soc_camera_xlate_by_fourcc(icd,
fmt->fmt.pix.pixelformat);
if (!xlate)
return -EINVAL;
ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
xlate->host_fmt);
if (ret < 0)
return ret;
bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret);
ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line,
fmt->fmt.pix.height);
if (ret < 0)
return ret;
sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret);
} else {
/* Called from VIDIOC_REQBUFS or in compatibility mode */
sizes[0] = icd->sizeimage;
}
alloc_ctxs[0] = priv->alloc_ctx;
if (!vq->num_buffers)
priv->sequence = 0;
if (!*count)
*count = 2;
priv->vb_count = *count;
*num_planes = 1;
/* Number of hardware slots */
if (is_continuous_transfer(priv))
priv->nr_hw_slots = MAX_BUFFER_NUM;
else
priv->nr_hw_slots = 1;
dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
return 0;
}
static int rcar_vin_setup(struct rcar_vin_priv *priv)
{
struct soc_camera_device *icd = priv->ici.icd;
struct rcar_vin_cam *cam = icd->host_priv;
u32 vnmc, dmr, interrupts;
bool progressive = false, output_is_yuv = false;
switch (priv->field) {
case V4L2_FIELD_TOP:
vnmc = VNMC_IM_ODD;
break;
case V4L2_FIELD_BOTTOM:
vnmc = VNMC_IM_EVEN;
break;
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_INTERLACED_TB:
vnmc = VNMC_IM_FULL;
break;
case V4L2_FIELD_INTERLACED_BT:
vnmc = VNMC_IM_FULL | VNMC_FOC;
break;
case V4L2_FIELD_NONE:
if (is_continuous_transfer(priv)) {
vnmc = VNMC_IM_ODD_EVEN;
progressive = true;
} else {
vnmc = VNMC_IM_ODD;
}
break;
default:
vnmc = VNMC_IM_ODD;
break;
}
/* input interface */
switch (icd->current_fmt->code) {
case V4L2_MBUS_FMT_YUYV8_1X16:
/* BT.601/BT.1358 16bit YCbCr422 */
vnmc |= VNMC_INF_YUV16;
break;
case V4L2_MBUS_FMT_YUYV8_2X8:
/* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */
vnmc |= priv->pdata->flags & RCAR_VIN_BT656 ?
VNMC_INF_YUV8_BT656 : VNMC_INF_YUV8_BT601;
default:
break;
}
/* output format */
switch (icd->current_fmt->host_fmt->fourcc) {
case V4L2_PIX_FMT_NV16:
iowrite32(ALIGN(cam->width * cam->height, 0x80),
priv->base + VNUVAOF_REG);
dmr = VNDMR_DTMD_YCSEP;
output_is_yuv = true;
break;
case V4L2_PIX_FMT_YUYV:
dmr = VNDMR_BPSM;
output_is_yuv = true;
break;
case V4L2_PIX_FMT_UYVY:
dmr = 0;
output_is_yuv = true;
break;
case V4L2_PIX_FMT_RGB555X:
dmr = VNDMR_DTMD_ARGB1555;
break;
case V4L2_PIX_FMT_RGB565:
dmr = 0;
break;
case V4L2_PIX_FMT_RGB32:
if (priv->chip == RCAR_H2 || priv->chip == RCAR_H1 ||
priv->chip == RCAR_E1) {
dmr = VNDMR_EXRGB;
break;
}
default:
dev_warn(icd->parent, "Invalid fourcc format (0x%x)\n",
icd->current_fmt->host_fmt->fourcc);
return -EINVAL;
}
/* Always update on field change */
vnmc |= VNMC_VUP;
/* If input and output use the same colorspace, use bypass mode */
if (output_is_yuv)
vnmc |= VNMC_BPS;
/* progressive or interlaced mode */
interrupts = progressive ? VNIE_FIE | VNIE_EFE : VNIE_EFE;
/* ack interrupts */
iowrite32(interrupts, priv->base + VNINTS_REG);
/* enable interrupts */
iowrite32(interrupts, priv->base + VNIE_REG);
/* start capturing */
iowrite32(dmr, priv->base + VNDMR_REG);
iowrite32(vnmc | VNMC_ME, priv->base + VNMC_REG);
return 0;
}
static void rcar_vin_capture(struct rcar_vin_priv *priv)
{
if (is_continuous_transfer(priv))
/* Continuous Frame Capture Mode */
iowrite32(VNFC_C_FRAME, priv->base + VNFC_REG);
else
/* Single Frame Capture Mode */
iowrite32(VNFC_S_FRAME, priv->base + VNFC_REG);
}
static void rcar_vin_request_capture_stop(struct rcar_vin_priv *priv)
{
priv->state = STOPPING;
/* set continuous & single transfer off */
iowrite32(0, priv->base + VNFC_REG);
/* disable capture (release DMA buffer), reset */
iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
priv->base + VNMC_REG);
/* update the status if stopped already */
if (!(ioread32(priv->base + VNMS_REG) & VNMS_CA))
priv->state = STOPPED;
}
static int rcar_vin_get_free_hw_slot(struct rcar_vin_priv *priv)
{
int slot;
for (slot = 0; slot < priv->nr_hw_slots; slot++)
if (priv->queue_buf[slot] == NULL)
return slot;
return -1;
}
static int rcar_vin_hw_ready(struct rcar_vin_priv *priv)
{
/* Ensure all HW slots are filled */
return rcar_vin_get_free_hw_slot(priv) < 0 ? 1 : 0;
}
/* Moves a buffer from the queue to the HW slots */
static int rcar_vin_fill_hw_slot(struct rcar_vin_priv *priv)
{
struct vb2_buffer *vb;
dma_addr_t phys_addr_top;
int slot;
if (list_empty(&priv->capture))
return 0;
/* Find a free HW slot */
slot = rcar_vin_get_free_hw_slot(priv);
if (slot < 0)
return 0;
vb = &list_entry(priv->capture.next, struct rcar_vin_buffer, list)->vb;
list_del_init(to_buf_list(vb));
priv->queue_buf[slot] = vb;
phys_addr_top = vb2_dma_contig_plane_dma_addr(vb, 0);
iowrite32(phys_addr_top, priv->base + VNMB_REG(slot));
return 1;
}
static void rcar_vin_videobuf_queue(struct vb2_buffer *vb)
{
struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
unsigned long size;
size = icd->sizeimage;
if (vb2_plane_size(vb, 0) < size) {
dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
goto error;
}
vb2_set_plane_payload(vb, 0, size);
dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
spin_lock_irq(&priv->lock);
list_add_tail(to_buf_list(vb), &priv->capture);
rcar_vin_fill_hw_slot(priv);
/* If we weren't running, and have enough buffers, start capturing! */
if (priv->state != RUNNING && rcar_vin_hw_ready(priv)) {
if (rcar_vin_setup(priv)) {
/* Submit error */
list_del_init(to_buf_list(vb));
spin_unlock_irq(&priv->lock);
goto error;
}
priv->request_to_stop = false;
init_completion(&priv->capture_stop);
priv->state = RUNNING;
rcar_vin_capture(priv);
}
spin_unlock_irq(&priv->lock);
return;
error:
vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
}
static void rcar_vin_videobuf_release(struct vb2_buffer *vb)
{
struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
unsigned int i;
int buf_in_use = 0;
spin_lock_irq(&priv->lock);
/* Is the buffer in use by the VIN hardware? */
for (i = 0; i < MAX_BUFFER_NUM; i++) {
if (priv->queue_buf[i] == vb) {
buf_in_use = 1;
break;
}
}
if (buf_in_use) {
while (priv->state != STOPPED) {
/* issue stop if running */
if (priv->state == RUNNING)
rcar_vin_request_capture_stop(priv);
/* wait until capturing has been stopped */
if (priv->state == STOPPING) {
priv->request_to_stop = true;
spin_unlock_irq(&priv->lock);
wait_for_completion(&priv->capture_stop);
spin_lock_irq(&priv->lock);
}
}
/*
* Capturing has now stopped. The buffer we have been asked
* to release could be any of the current buffers in use, so
* release all buffers that are in use by HW
*/
for (i = 0; i < MAX_BUFFER_NUM; i++) {
if (priv->queue_buf[i]) {
vb2_buffer_done(priv->queue_buf[i],
VB2_BUF_STATE_ERROR);
priv->queue_buf[i] = NULL;
}
}
} else {
list_del_init(to_buf_list(vb));
}
spin_unlock_irq(&priv->lock);
}
static int rcar_vin_videobuf_init(struct vb2_buffer *vb)
{
INIT_LIST_HEAD(to_buf_list(vb));
return 0;
}
static int rcar_vin_stop_streaming(struct vb2_queue *vq)
{
struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
struct list_head *buf_head, *tmp;
spin_lock_irq(&priv->lock);
list_for_each_safe(buf_head, tmp, &priv->capture)
list_del_init(buf_head);
spin_unlock_irq(&priv->lock);
return 0;
}
static struct vb2_ops rcar_vin_vb2_ops = {
.queue_setup = rcar_vin_videobuf_setup,
.buf_init = rcar_vin_videobuf_init,
.buf_cleanup = rcar_vin_videobuf_release,
.buf_queue = rcar_vin_videobuf_queue,
.stop_streaming = rcar_vin_stop_streaming,
.wait_prepare = soc_camera_unlock,
.wait_finish = soc_camera_lock,
};
static irqreturn_t rcar_vin_irq(int irq, void *data)
{
struct rcar_vin_priv *priv = data;
u32 int_status;
bool can_run = false, hw_stopped;
int slot;
unsigned int handled = 0;
spin_lock(&priv->lock);
int_status = ioread32(priv->base + VNINTS_REG);
if (!int_status)
goto done;
/* ack interrupts */
iowrite32(int_status, priv->base + VNINTS_REG);
handled = 1;
/* nothing to do if capture status is 'STOPPED' */
if (priv->state == STOPPED)
goto done;
hw_stopped = !(ioread32(priv->base + VNMS_REG) & VNMS_CA);
if (!priv->request_to_stop) {
if (is_continuous_transfer(priv))
slot = (ioread32(priv->base + VNMS_REG) &
VNMS_FBS_MASK) >> VNMS_FBS_SHIFT;
else
slot = 0;
priv->queue_buf[slot]->v4l2_buf.field = priv->field;
priv->queue_buf[slot]->v4l2_buf.sequence = priv->sequence++;
do_gettimeofday(&priv->queue_buf[slot]->v4l2_buf.timestamp);
vb2_buffer_done(priv->queue_buf[slot], VB2_BUF_STATE_DONE);
priv->queue_buf[slot] = NULL;
if (priv->state != STOPPING)
can_run = rcar_vin_fill_hw_slot(priv);
if (hw_stopped || !can_run) {
priv->state = STOPPED;
} else if (is_continuous_transfer(priv) &&
list_empty(&priv->capture) &&
priv->state == RUNNING) {
/*
* The continuous capturing requires an explicit stop
* operation when there is no buffer to be set into
* the VnMBm registers.
*/
rcar_vin_request_capture_stop(priv);
} else {
rcar_vin_capture(priv);
}
} else if (hw_stopped) {
priv->state = STOPPED;
priv->request_to_stop = false;
complete(&priv->capture_stop);
}
done:
spin_unlock(&priv->lock);
return IRQ_RETVAL(handled);
}
static int rcar_vin_add_device(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
int i;
for (i = 0; i < MAX_BUFFER_NUM; i++)
priv->queue_buf[i] = NULL;
pm_runtime_get_sync(ici->v4l2_dev.dev);
dev_dbg(icd->parent, "R-Car VIN driver attached to camera %d\n",
icd->devnum);
return 0;
}
static void rcar_vin_remove_device(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
struct vb2_buffer *vb;
int i;
/* disable capture, disable interrupts */
iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
priv->base + VNMC_REG);
iowrite32(0, priv->base + VNIE_REG);
priv->state = STOPPED;
priv->request_to_stop = false;
/* make sure active buffer is cancelled */
spin_lock_irq(&priv->lock);
for (i = 0; i < MAX_BUFFER_NUM; i++) {
vb = priv->queue_buf[i];
if (vb) {
list_del_init(to_buf_list(vb));
vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
}
}
spin_unlock_irq(&priv->lock);
pm_runtime_put(ici->v4l2_dev.dev);
dev_dbg(icd->parent, "R-Car VIN driver detached from camera %d\n",
icd->devnum);
}
/* Called with .host_lock held */
static int rcar_vin_clock_start(struct soc_camera_host *ici)
{
/* VIN does not have "mclk" */
return 0;
}
/* Called with .host_lock held */
static void rcar_vin_clock_stop(struct soc_camera_host *ici)
{
/* VIN does not have "mclk" */
}
/* rect is guaranteed to not exceed the scaled camera rectangle */
static int rcar_vin_set_rect(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_cam *cam = icd->host_priv;
struct rcar_vin_priv *priv = ici->priv;
unsigned int left_offset, top_offset;
unsigned char dsize = 0;
struct v4l2_rect *cam_subrect = &cam->subrect;
dev_dbg(icd->parent, "Crop %ux%u@%u:%u\n",
icd->user_width, icd->user_height, cam->vin_left, cam->vin_top);
left_offset = cam->vin_left;
top_offset = cam->vin_top;
if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_RGB32 &&
priv->chip == RCAR_E1)
dsize = 1;
dev_dbg(icd->parent, "Cam %ux%u@%u:%u\n",
cam->width, cam->height, cam->vin_left, cam->vin_top);
dev_dbg(icd->parent, "Cam subrect %ux%u@%u:%u\n",
cam_subrect->width, cam_subrect->height,
cam_subrect->left, cam_subrect->top);
/* Set Start/End Pixel/Line Pre-Clip */
iowrite32(left_offset << dsize, priv->base + VNSPPRC_REG);
iowrite32((left_offset + cam->width - 1) << dsize,
priv->base + VNEPPRC_REG);
switch (priv->field) {
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
iowrite32(top_offset / 2, priv->base + VNSLPRC_REG);
iowrite32((top_offset + cam->height) / 2 - 1,
priv->base + VNELPRC_REG);
break;
default:
iowrite32(top_offset, priv->base + VNSLPRC_REG);
iowrite32(top_offset + cam->height - 1,
priv->base + VNELPRC_REG);
break;
}
/* Set Start/End Pixel/Line Post-Clip */
iowrite32(0, priv->base + VNSPPOC_REG);
iowrite32(0, priv->base + VNSLPOC_REG);
iowrite32((cam_subrect->width - 1) << dsize, priv->base + VNEPPOC_REG);
switch (priv->field) {
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
iowrite32(cam_subrect->height / 2 - 1,
priv->base + VNELPOC_REG);
break;
default:
iowrite32(cam_subrect->height - 1, priv->base + VNELPOC_REG);
break;
}
iowrite32(ALIGN(cam->width, 0x10), priv->base + VNIS_REG);
return 0;
}
static void capture_stop_preserve(struct rcar_vin_priv *priv, u32 *vnmc)
{
*vnmc = ioread32(priv->base + VNMC_REG);
/* module disable */
iowrite32(*vnmc & ~VNMC_ME, priv->base + VNMC_REG);
}
static void capture_restore(struct rcar_vin_priv *priv, u32 vnmc)
{
unsigned long timeout = jiffies + 10 * HZ;
/*
* Wait until the end of the current frame. It can take a long time,
* but if it has been aborted by a MRST1 reset, it should exit sooner.
*/
while ((ioread32(priv->base + VNMS_REG) & VNMS_AV) &&
time_before(jiffies, timeout))
msleep(1);
if (time_after(jiffies, timeout)) {
dev_err(priv->ici.v4l2_dev.dev,
"Timeout waiting for frame end! Interface problem?\n");
return;
}
iowrite32(vnmc, priv->base + VNMC_REG);
}
#define VIN_MBUS_FLAGS (V4L2_MBUS_MASTER | \
V4L2_MBUS_PCLK_SAMPLE_RISING | \
V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
V4L2_MBUS_HSYNC_ACTIVE_LOW | \
V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
V4L2_MBUS_VSYNC_ACTIVE_LOW | \
V4L2_MBUS_DATA_ACTIVE_HIGH)
static int rcar_vin_set_bus_param(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct v4l2_mbus_config cfg;
unsigned long common_flags;
u32 vnmc;
u32 val;
int ret;
capture_stop_preserve(priv, &vnmc);
ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
if (!ret) {
common_flags = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
if (!common_flags) {
dev_warn(icd->parent,
"MBUS flags incompatible: camera 0x%x, host 0x%x\n",
cfg.flags, VIN_MBUS_FLAGS);
return -EINVAL;
}
} else if (ret != -ENOIOCTLCMD) {
return ret;
} else {
common_flags = VIN_MBUS_FLAGS;
}
/* Make choises, based on platform preferences */
if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
if (priv->pdata->flags & RCAR_VIN_HSYNC_ACTIVE_LOW)
common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
else
common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
}
if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
if (priv->pdata->flags & RCAR_VIN_VSYNC_ACTIVE_LOW)
common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
else
common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
}
cfg.flags = common_flags;
ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
if (ret < 0 && ret != -ENOIOCTLCMD)
return ret;
val = priv->field == V4L2_FIELD_NONE ? VNDMR2_FTEV : 0;
if (!(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW))
val |= VNDMR2_VPS;
if (!(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW))
val |= VNDMR2_HPS;
iowrite32(val, priv->base + VNDMR2_REG);
ret = rcar_vin_set_rect(icd);
if (ret < 0)
return ret;
capture_restore(priv, vnmc);
return 0;
}
static int rcar_vin_try_bus_param(struct soc_camera_device *icd,
unsigned char buswidth)
{
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct v4l2_mbus_config cfg;
int ret;
ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
if (ret == -ENOIOCTLCMD)
return 0;
else if (ret)
return ret;
if (buswidth > 24)
return -EINVAL;
/* check is there common mbus flags */
ret = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
if (ret)
return 0;
dev_warn(icd->parent,
"MBUS flags incompatible: camera 0x%x, host 0x%x\n",
cfg.flags, VIN_MBUS_FLAGS);
return -EINVAL;
}
static bool rcar_vin_packing_supported(const struct soc_mbus_pixelfmt *fmt)
{
return fmt->packing == SOC_MBUS_PACKING_NONE ||
(fmt->bits_per_sample > 8 &&
fmt->packing == SOC_MBUS_PACKING_EXTEND16);
}
static const struct soc_mbus_pixelfmt rcar_vin_formats[] = {
{
.fourcc = V4L2_PIX_FMT_NV16,
.name = "NV16",
.bits_per_sample = 8,
.packing = SOC_MBUS_PACKING_2X8_PADHI,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PLANAR_Y_C,
},
{
.fourcc = V4L2_PIX_FMT_UYVY,
.name = "UYVY",
.bits_per_sample = 16,
.packing = SOC_MBUS_PACKING_NONE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
{
.fourcc = V4L2_PIX_FMT_RGB565,
.name = "RGB565",
.bits_per_sample = 16,
.packing = SOC_MBUS_PACKING_NONE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
{
.fourcc = V4L2_PIX_FMT_RGB555X,
.name = "ARGB1555",
.bits_per_sample = 16,
.packing = SOC_MBUS_PACKING_NONE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
{
.fourcc = V4L2_PIX_FMT_RGB32,
.name = "RGB888",
.bits_per_sample = 32,
.packing = SOC_MBUS_PACKING_NONE,
.order = SOC_MBUS_ORDER_LE,
.layout = SOC_MBUS_LAYOUT_PACKED,
},
};
static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
struct soc_camera_format_xlate *xlate)
{
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct device *dev = icd->parent;
int ret, k, n;
int formats = 0;
struct rcar_vin_cam *cam;
enum v4l2_mbus_pixelcode code;
const struct soc_mbus_pixelfmt *fmt;
ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
if (ret < 0)
return 0;
fmt = soc_mbus_get_fmtdesc(code);
if (!fmt) {
dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
return 0;
}
ret = rcar_vin_try_bus_param(icd, fmt->bits_per_sample);
if (ret < 0)
return 0;
if (!icd->host_priv) {
struct v4l2_mbus_framefmt mf;
struct v4l2_rect rect;
struct device *dev = icd->parent;
int shift;
ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
if (ret < 0)
return ret;
/* Cache current client geometry */
ret = soc_camera_client_g_rect(sd, &rect);
if (ret == -ENOIOCTLCMD) {
/* Sensor driver doesn't support cropping */
rect.left = 0;
rect.top = 0;
rect.width = mf.width;
rect.height = mf.height;
} else if (ret < 0) {
return ret;
}
/*
* If sensor proposes too large format then try smaller ones:
* 1280x960, 640x480, 320x240
*/
for (shift = 0; shift < 3; shift++) {
if (mf.width <= VIN_MAX_WIDTH &&
mf.height <= VIN_MAX_HEIGHT)
break;
mf.width = 1280 >> shift;
mf.height = 960 >> shift;
ret = v4l2_device_call_until_err(sd->v4l2_dev,
soc_camera_grp_id(icd),
video, s_mbus_fmt,
&mf);
if (ret < 0)
return ret;
}
if (shift == 3) {
dev_err(dev,
"Failed to configure the client below %ux%x\n",
mf.width, mf.height);
return -EIO;
}
dev_dbg(dev, "camera fmt %ux%u\n", mf.width, mf.height);
cam = kzalloc(sizeof(*cam), GFP_KERNEL);
if (!cam)
return -ENOMEM;
/*
* We are called with current camera crop,
* initialise subrect with it
*/
cam->rect = rect;
cam->subrect = rect;
cam->width = mf.width;
cam->height = mf.height;
icd->host_priv = cam;
} else {
cam = icd->host_priv;
}
/* Beginning of a pass */
if (!idx)
cam->extra_fmt = NULL;
switch (code) {
case V4L2_MBUS_FMT_YUYV8_1X16:
case V4L2_MBUS_FMT_YUYV8_2X8:
if (cam->extra_fmt)
break;
/* Add all our formats that can be generated by VIN */
cam->extra_fmt = rcar_vin_formats;
n = ARRAY_SIZE(rcar_vin_formats);
formats += n;
for (k = 0; xlate && k < n; k++, xlate++) {
xlate->host_fmt = &rcar_vin_formats[k];
xlate->code = code;
dev_dbg(dev, "Providing format %s using code %d\n",
rcar_vin_formats[k].name, code);
}
break;
default:
if (!rcar_vin_packing_supported(fmt))
return 0;
dev_dbg(dev, "Providing format %s in pass-through mode\n",
fmt->name);
break;
}
/* Generic pass-through */
formats++;
if (xlate) {
xlate->host_fmt = fmt;
xlate->code = code;
xlate++;
}
return formats;
}
static void rcar_vin_put_formats(struct soc_camera_device *icd)
{
kfree(icd->host_priv);
icd->host_priv = NULL;
}
static int rcar_vin_set_crop(struct soc_camera_device *icd,
const struct v4l2_crop *a)
{
struct v4l2_crop a_writable = *a;
const struct v4l2_rect *rect = &a_writable.c;
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
struct v4l2_crop cam_crop;
struct rcar_vin_cam *cam = icd->host_priv;
struct v4l2_rect *cam_rect = &cam_crop.c;
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct device *dev = icd->parent;
struct v4l2_mbus_framefmt mf;
u32 vnmc;
int ret, i;
dev_dbg(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
rect->left, rect->top);
/* During camera cropping its output window can change too, stop VIN */
capture_stop_preserve(priv, &vnmc);
dev_dbg(dev, "VNMC_REG 0x%x\n", vnmc);
/* Apply iterative camera S_CROP for new input window. */
ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
&cam->rect, &cam->subrect);
if (ret < 0)
return ret;
dev_dbg(dev, "camera cropped to %ux%u@%u:%u\n",
cam_rect->width, cam_rect->height,
cam_rect->left, cam_rect->top);
/* On success cam_crop contains current camera crop */
/* Retrieve camera output window */
ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
if (ret < 0)
return ret;
if (mf.width > VIN_MAX_WIDTH || mf.height > VIN_MAX_HEIGHT)
return -EINVAL;
/* Cache camera output window */
cam->width = mf.width;
cam->height = mf.height;
icd->user_width = cam->width;
icd->user_height = cam->height;
cam->vin_left = rect->left & ~1;
cam->vin_top = rect->top & ~1;
/* Use VIN cropping to crop to the new window. */
ret = rcar_vin_set_rect(icd);
if (ret < 0)
return ret;
cam->subrect = *rect;
dev_dbg(dev, "VIN cropped to %ux%u@%u:%u\n",
icd->user_width, icd->user_height,
cam->vin_left, cam->vin_top);
/* Restore capture */
for (i = 0; i < MAX_BUFFER_NUM; i++) {
if (priv->queue_buf[i] && priv->state == STOPPED) {
vnmc |= VNMC_ME;
break;
}
}
capture_restore(priv, vnmc);
/* Even if only camera cropping succeeded */
return ret;
}
static int rcar_vin_get_crop(struct soc_camera_device *icd,
struct v4l2_crop *a)
{
struct rcar_vin_cam *cam = icd->host_priv;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->c = cam->subrect;
return 0;
}
/* Similar to set_crop multistage iterative algorithm */
static int rcar_vin_set_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct rcar_vin_priv *priv = ici->priv;
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct rcar_vin_cam *cam = icd->host_priv;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_mbus_framefmt mf;
struct device *dev = icd->parent;
__u32 pixfmt = pix->pixelformat;
const struct soc_camera_format_xlate *xlate;
unsigned int vin_sub_width = 0, vin_sub_height = 0;
int ret;
bool can_scale;
enum v4l2_field field;
v4l2_std_id std;
dev_dbg(dev, "S_FMT(pix=0x%x, %ux%u)\n",
pixfmt, pix->width, pix->height);
switch (pix->field) {
default:
pix->field = V4L2_FIELD_NONE;
/* fall-through */
case V4L2_FIELD_NONE:
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
field = pix->field;
break;
case V4L2_FIELD_INTERLACED:
/* Query for standard if not explicitly mentioned _TB/_BT */
ret = v4l2_subdev_call(sd, video, querystd, &std);
if (ret < 0)
std = V4L2_STD_625_50;
field = std & V4L2_STD_625_50 ? V4L2_FIELD_INTERLACED_TB :
V4L2_FIELD_INTERLACED_BT;
break;
}
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
if (!xlate) {
dev_warn(dev, "Format %x not found\n", pixfmt);
return -EINVAL;
}
/* Calculate client output geometry */
soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf,
12);
mf.field = pix->field;
mf.colorspace = pix->colorspace;
mf.code = xlate->code;
switch (pixfmt) {
case V4L2_PIX_FMT_RGB32:
can_scale = priv->chip != RCAR_E1;
break;
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_RGB565:
case V4L2_PIX_FMT_RGB555X:
can_scale = true;
break;
default:
can_scale = false;
break;
}
dev_dbg(dev, "request camera output %ux%u\n", mf.width, mf.height);
ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
&mf, &vin_sub_width, &vin_sub_height,
can_scale, 12);
/* Done with the camera. Now see if we can improve the result */
dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
ret, mf.width, mf.height, pix->width, pix->height);
if (ret == -ENOIOCTLCMD)
dev_dbg(dev, "Sensor doesn't support scaling\n");
else if (ret < 0)
return ret;
if (mf.code != xlate->code)
return -EINVAL;
/* Prepare VIN crop */
cam->width = mf.width;
cam->height = mf.height;
/* Use VIN scaling to scale to the requested user window. */
/* We cannot scale up */
if (pix->width > vin_sub_width)
vin_sub_width = pix->width;
if (pix->height > vin_sub_height)
vin_sub_height = pix->height;
pix->colorspace = mf.colorspace;
if (!can_scale) {
pix->width = vin_sub_width;
pix->height = vin_sub_height;
}
/*
* We have calculated CFLCR, the actual configuration will be performed
* in rcar_vin_set_bus_param()
*/
dev_dbg(dev, "W: %u : %u, H: %u : %u\n",
vin_sub_width, pix->width, vin_sub_height, pix->height);
icd->current_fmt = xlate;
priv->field = field;
return 0;
}
static int rcar_vin_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
const struct soc_camera_format_xlate *xlate;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct v4l2_mbus_framefmt mf;
__u32 pixfmt = pix->pixelformat;
int width, height;
int ret;
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
if (!xlate) {
xlate = icd->current_fmt;
dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
pixfmt, xlate->host_fmt->fourcc);
pixfmt = xlate->host_fmt->fourcc;
pix->pixelformat = pixfmt;
pix->colorspace = icd->colorspace;
}
/* FIXME: calculate using depth and bus width */
v4l_bound_align_image(&pix->width, 2, VIN_MAX_WIDTH, 1,
&pix->height, 4, VIN_MAX_HEIGHT, 2, 0);
width = pix->width;
height = pix->height;
/* let soc-camera calculate these values */
pix->bytesperline = 0;
pix->sizeimage = 0;
/* limit to sensor capabilities */
mf.width = pix->width;
mf.height = pix->height;
mf.field = pix->field;
mf.code = xlate->code;
mf.colorspace = pix->colorspace;
ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
video, try_mbus_fmt, &mf);
if (ret < 0)
return ret;
pix->width = mf.width;
pix->height = mf.height;
pix->field = mf.field;
pix->colorspace = mf.colorspace;
if (pixfmt == V4L2_PIX_FMT_NV16) {
/* FIXME: check against rect_max after converting soc-camera */
/* We can scale precisely, need a bigger image from camera */
if (pix->width < width || pix->height < height) {
/*
* We presume, the sensor behaves sanely, i.e. if
* requested a bigger rectangle, it will not return a
* smaller one.
*/
mf.width = VIN_MAX_WIDTH;
mf.height = VIN_MAX_HEIGHT;
ret = v4l2_device_call_until_err(sd->v4l2_dev,
soc_camera_grp_id(icd),
video, try_mbus_fmt,
&mf);
if (ret < 0) {
dev_err(icd->parent,
"client try_fmt() = %d\n", ret);
return ret;
}
}
/* We will scale exactly */
if (mf.width > width)
pix->width = width;
if (mf.height > height)
pix->height = height;
}
return ret;
}
static unsigned int rcar_vin_poll(struct file *file, poll_table *pt)
{
struct soc_camera_device *icd = file->private_data;
return vb2_poll(&icd->vb2_vidq, file, pt);
}
static int rcar_vin_querycap(struct soc_camera_host *ici,
struct v4l2_capability *cap)
{
strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card));
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
return 0;
}
static int rcar_vin_init_videobuf2(struct vb2_queue *vq,
struct soc_camera_device *icd)
{
vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vq->io_modes = VB2_MMAP | VB2_USERPTR;
vq->drv_priv = icd;
vq->ops = &rcar_vin_vb2_ops;
vq->mem_ops = &vb2_dma_contig_memops;
vq->buf_struct_size = sizeof(struct rcar_vin_buffer);
vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
return vb2_queue_init(vq);
}
static struct soc_camera_host_ops rcar_vin_host_ops = {
.owner = THIS_MODULE,
.add = rcar_vin_add_device,
.remove = rcar_vin_remove_device,
.clock_start = rcar_vin_clock_start,
.clock_stop = rcar_vin_clock_stop,
.get_formats = rcar_vin_get_formats,
.put_formats = rcar_vin_put_formats,
.get_crop = rcar_vin_get_crop,
.set_crop = rcar_vin_set_crop,
.try_fmt = rcar_vin_try_fmt,
.set_fmt = rcar_vin_set_fmt,
.poll = rcar_vin_poll,
.querycap = rcar_vin_querycap,
.set_bus_param = rcar_vin_set_bus_param,
.init_videobuf2 = rcar_vin_init_videobuf2,
};
static struct platform_device_id rcar_vin_id_table[] = {
{ "r8a7790-vin", RCAR_H2 },
{ "r8a7779-vin", RCAR_H1 },
{ "r8a7778-vin", RCAR_M1 },
{ "uPD35004-vin", RCAR_E1 },
{},
};
MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
static int rcar_vin_probe(struct platform_device *pdev)
{
struct rcar_vin_priv *priv;
struct resource *mem;
struct rcar_vin_platform_data *pdata;
int irq, ret;
pdata = pdev->dev.platform_data;
if (!pdata || !pdata->flags) {
dev_err(&pdev->dev, "platform data not set\n");
return -EINVAL;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (mem == NULL)
return -EINVAL;
irq = platform_get_irq(pdev, 0);
if (irq <= 0)
return -EINVAL;
priv = devm_kzalloc(&pdev->dev, sizeof(struct rcar_vin_priv),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->base = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
ret = devm_request_irq(&pdev->dev, irq, rcar_vin_irq, IRQF_SHARED,
dev_name(&pdev->dev), priv);
if (ret)
return ret;
priv->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
if (IS_ERR(priv->alloc_ctx))
return PTR_ERR(priv->alloc_ctx);
priv->ici.priv = priv;
priv->ici.v4l2_dev.dev = &pdev->dev;
priv->ici.nr = pdev->id;
priv->ici.drv_name = dev_name(&pdev->dev);
priv->ici.ops = &rcar_vin_host_ops;
priv->pdata = pdata;
priv->chip = pdev->id_entry->driver_data;
spin_lock_init(&priv->lock);
INIT_LIST_HEAD(&priv->capture);
priv->state = STOPPED;
pm_suspend_ignore_children(&pdev->dev, true);
pm_runtime_enable(&pdev->dev);
ret = soc_camera_host_register(&priv->ici);
if (ret)
goto cleanup;
return 0;
cleanup:
pm_runtime_disable(&pdev->dev);
vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
return ret;
}
static int rcar_vin_remove(struct platform_device *pdev)
{
struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
struct rcar_vin_priv *priv = container_of(soc_host,
struct rcar_vin_priv, ici);
soc_camera_host_unregister(soc_host);
pm_runtime_disable(&pdev->dev);
vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
return 0;
}
static struct platform_driver rcar_vin_driver = {
.probe = rcar_vin_probe,
.remove = rcar_vin_remove,
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
.id_table = rcar_vin_id_table,
};
module_platform_driver(rcar_vin_driver);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:rcar_vin");
MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");
