355 строки
7.9 KiB
C
355 строки
7.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* i.MX6 Video Data Order Adapter (VDOA)
|
|
*
|
|
* Copyright (C) 2014 Philipp Zabel
|
|
* Copyright (C) 2016 Pengutronix, Michael Tretter <kernel@pengutronix.de>
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/device.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/videodev2.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "imx-vdoa.h"
|
|
|
|
#define VDOA_NAME "imx-vdoa"
|
|
|
|
#define VDOAC 0x00
|
|
#define VDOASRR 0x04
|
|
#define VDOAIE 0x08
|
|
#define VDOAIST 0x0c
|
|
#define VDOAFP 0x10
|
|
#define VDOAIEBA00 0x14
|
|
#define VDOAIEBA01 0x18
|
|
#define VDOAIEBA02 0x1c
|
|
#define VDOAIEBA10 0x20
|
|
#define VDOAIEBA11 0x24
|
|
#define VDOAIEBA12 0x28
|
|
#define VDOASL 0x2c
|
|
#define VDOAIUBO 0x30
|
|
#define VDOAVEBA0 0x34
|
|
#define VDOAVEBA1 0x38
|
|
#define VDOAVEBA2 0x3c
|
|
#define VDOAVUBO 0x40
|
|
#define VDOASR 0x44
|
|
|
|
#define VDOAC_ISEL BIT(6)
|
|
#define VDOAC_PFS BIT(5)
|
|
#define VDOAC_SO BIT(4)
|
|
#define VDOAC_SYNC BIT(3)
|
|
#define VDOAC_NF BIT(2)
|
|
#define VDOAC_BNDM_MASK 0x3
|
|
#define VDOAC_BAND_HEIGHT_8 0x0
|
|
#define VDOAC_BAND_HEIGHT_16 0x1
|
|
#define VDOAC_BAND_HEIGHT_32 0x2
|
|
|
|
#define VDOASRR_START BIT(1)
|
|
#define VDOASRR_SWRST BIT(0)
|
|
|
|
#define VDOAIE_EITERR BIT(1)
|
|
#define VDOAIE_EIEOT BIT(0)
|
|
|
|
#define VDOAIST_TERR BIT(1)
|
|
#define VDOAIST_EOT BIT(0)
|
|
|
|
#define VDOAFP_FH_MASK (0x1fff << 16)
|
|
#define VDOAFP_FW_MASK (0x3fff)
|
|
|
|
#define VDOASL_VSLY_MASK (0x3fff << 16)
|
|
#define VDOASL_ISLY_MASK (0x7fff)
|
|
|
|
#define VDOASR_ERRW BIT(4)
|
|
#define VDOASR_EOB BIT(3)
|
|
#define VDOASR_CURRENT_FRAME (0x3 << 1)
|
|
#define VDOASR_CURRENT_BUFFER BIT(1)
|
|
|
|
enum {
|
|
V4L2_M2M_SRC = 0,
|
|
V4L2_M2M_DST = 1,
|
|
};
|
|
|
|
struct vdoa_data {
|
|
struct vdoa_ctx *curr_ctx;
|
|
struct device *dev;
|
|
struct clk *vdoa_clk;
|
|
void __iomem *regs;
|
|
};
|
|
|
|
struct vdoa_q_data {
|
|
unsigned int width;
|
|
unsigned int height;
|
|
unsigned int bytesperline;
|
|
unsigned int sizeimage;
|
|
u32 pixelformat;
|
|
};
|
|
|
|
struct vdoa_ctx {
|
|
struct vdoa_data *vdoa;
|
|
struct completion completion;
|
|
struct vdoa_q_data q_data[2];
|
|
unsigned int submitted_job;
|
|
unsigned int completed_job;
|
|
};
|
|
|
|
static irqreturn_t vdoa_irq_handler(int irq, void *data)
|
|
{
|
|
struct vdoa_data *vdoa = data;
|
|
struct vdoa_ctx *curr_ctx;
|
|
u32 val;
|
|
|
|
/* Disable interrupts */
|
|
writel(0, vdoa->regs + VDOAIE);
|
|
|
|
curr_ctx = vdoa->curr_ctx;
|
|
if (!curr_ctx) {
|
|
dev_warn(vdoa->dev,
|
|
"Instance released before the end of transaction\n");
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
val = readl(vdoa->regs + VDOAIST);
|
|
writel(val, vdoa->regs + VDOAIST);
|
|
if (val & VDOAIST_TERR) {
|
|
val = readl(vdoa->regs + VDOASR) & VDOASR_ERRW;
|
|
dev_err(vdoa->dev, "AXI %s error\n", val ? "write" : "read");
|
|
} else if (!(val & VDOAIST_EOT)) {
|
|
dev_warn(vdoa->dev, "Spurious interrupt\n");
|
|
}
|
|
curr_ctx->completed_job++;
|
|
complete(&curr_ctx->completion);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
int vdoa_wait_for_completion(struct vdoa_ctx *ctx)
|
|
{
|
|
struct vdoa_data *vdoa = ctx->vdoa;
|
|
|
|
if (ctx->submitted_job == ctx->completed_job)
|
|
return 0;
|
|
|
|
if (!wait_for_completion_timeout(&ctx->completion,
|
|
msecs_to_jiffies(300))) {
|
|
dev_err(vdoa->dev,
|
|
"Timeout waiting for transfer result\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vdoa_wait_for_completion);
|
|
|
|
void vdoa_device_run(struct vdoa_ctx *ctx, dma_addr_t dst, dma_addr_t src)
|
|
{
|
|
struct vdoa_q_data *src_q_data, *dst_q_data;
|
|
struct vdoa_data *vdoa = ctx->vdoa;
|
|
u32 val;
|
|
|
|
if (vdoa->curr_ctx)
|
|
vdoa_wait_for_completion(vdoa->curr_ctx);
|
|
|
|
vdoa->curr_ctx = ctx;
|
|
|
|
reinit_completion(&ctx->completion);
|
|
ctx->submitted_job++;
|
|
|
|
src_q_data = &ctx->q_data[V4L2_M2M_SRC];
|
|
dst_q_data = &ctx->q_data[V4L2_M2M_DST];
|
|
|
|
/* Progressive, no sync, 1 frame per run */
|
|
if (dst_q_data->pixelformat == V4L2_PIX_FMT_YUYV)
|
|
val = VDOAC_PFS;
|
|
else
|
|
val = 0;
|
|
writel(val, vdoa->regs + VDOAC);
|
|
|
|
writel(dst_q_data->height << 16 | dst_q_data->width,
|
|
vdoa->regs + VDOAFP);
|
|
|
|
val = dst;
|
|
writel(val, vdoa->regs + VDOAIEBA00);
|
|
|
|
writel(src_q_data->bytesperline << 16 | dst_q_data->bytesperline,
|
|
vdoa->regs + VDOASL);
|
|
|
|
if (dst_q_data->pixelformat == V4L2_PIX_FMT_NV12 ||
|
|
dst_q_data->pixelformat == V4L2_PIX_FMT_NV21)
|
|
val = dst_q_data->bytesperline * dst_q_data->height;
|
|
else
|
|
val = 0;
|
|
writel(val, vdoa->regs + VDOAIUBO);
|
|
|
|
val = src;
|
|
writel(val, vdoa->regs + VDOAVEBA0);
|
|
val = round_up(src_q_data->bytesperline * src_q_data->height, 4096);
|
|
writel(val, vdoa->regs + VDOAVUBO);
|
|
|
|
/* Enable interrupts and start transfer */
|
|
writel(VDOAIE_EITERR | VDOAIE_EIEOT, vdoa->regs + VDOAIE);
|
|
writel(VDOASRR_START, vdoa->regs + VDOASRR);
|
|
}
|
|
EXPORT_SYMBOL(vdoa_device_run);
|
|
|
|
struct vdoa_ctx *vdoa_context_create(struct vdoa_data *vdoa)
|
|
{
|
|
struct vdoa_ctx *ctx;
|
|
int err;
|
|
|
|
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx)
|
|
return NULL;
|
|
|
|
err = clk_prepare_enable(vdoa->vdoa_clk);
|
|
if (err) {
|
|
kfree(ctx);
|
|
return NULL;
|
|
}
|
|
|
|
init_completion(&ctx->completion);
|
|
ctx->vdoa = vdoa;
|
|
|
|
return ctx;
|
|
}
|
|
EXPORT_SYMBOL(vdoa_context_create);
|
|
|
|
void vdoa_context_destroy(struct vdoa_ctx *ctx)
|
|
{
|
|
struct vdoa_data *vdoa = ctx->vdoa;
|
|
|
|
if (vdoa->curr_ctx == ctx) {
|
|
vdoa_wait_for_completion(vdoa->curr_ctx);
|
|
vdoa->curr_ctx = NULL;
|
|
}
|
|
|
|
clk_disable_unprepare(vdoa->vdoa_clk);
|
|
kfree(ctx);
|
|
}
|
|
EXPORT_SYMBOL(vdoa_context_destroy);
|
|
|
|
int vdoa_context_configure(struct vdoa_ctx *ctx,
|
|
unsigned int width, unsigned int height,
|
|
u32 pixelformat)
|
|
{
|
|
struct vdoa_q_data *src_q_data;
|
|
struct vdoa_q_data *dst_q_data;
|
|
|
|
if (width < 16 || width > 8192 || width % 16 != 0 ||
|
|
height < 16 || height > 4096 || height % 16 != 0)
|
|
return -EINVAL;
|
|
|
|
if (pixelformat != V4L2_PIX_FMT_YUYV &&
|
|
pixelformat != V4L2_PIX_FMT_NV12)
|
|
return -EINVAL;
|
|
|
|
/* If no context is passed, only check if the format is valid */
|
|
if (!ctx)
|
|
return 0;
|
|
|
|
src_q_data = &ctx->q_data[V4L2_M2M_SRC];
|
|
dst_q_data = &ctx->q_data[V4L2_M2M_DST];
|
|
|
|
src_q_data->width = width;
|
|
src_q_data->height = height;
|
|
src_q_data->bytesperline = width;
|
|
src_q_data->sizeimage =
|
|
round_up(src_q_data->bytesperline * height, 4096) +
|
|
src_q_data->bytesperline * height / 2;
|
|
|
|
dst_q_data->width = width;
|
|
dst_q_data->height = height;
|
|
dst_q_data->pixelformat = pixelformat;
|
|
switch (pixelformat) {
|
|
case V4L2_PIX_FMT_YUYV:
|
|
dst_q_data->bytesperline = width * 2;
|
|
dst_q_data->sizeimage = dst_q_data->bytesperline * height;
|
|
break;
|
|
case V4L2_PIX_FMT_NV12:
|
|
default:
|
|
dst_q_data->bytesperline = width;
|
|
dst_q_data->sizeimage =
|
|
dst_q_data->bytesperline * height * 3 / 2;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vdoa_context_configure);
|
|
|
|
static int vdoa_probe(struct platform_device *pdev)
|
|
{
|
|
struct vdoa_data *vdoa;
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "DMA enable failed\n");
|
|
return ret;
|
|
}
|
|
|
|
vdoa = devm_kzalloc(&pdev->dev, sizeof(*vdoa), GFP_KERNEL);
|
|
if (!vdoa)
|
|
return -ENOMEM;
|
|
|
|
vdoa->dev = &pdev->dev;
|
|
|
|
vdoa->vdoa_clk = devm_clk_get(vdoa->dev, NULL);
|
|
if (IS_ERR(vdoa->vdoa_clk)) {
|
|
dev_err(vdoa->dev, "Failed to get clock\n");
|
|
return PTR_ERR(vdoa->vdoa_clk);
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
vdoa->regs = devm_ioremap_resource(vdoa->dev, res);
|
|
if (IS_ERR(vdoa->regs))
|
|
return PTR_ERR(vdoa->regs);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!res)
|
|
return -EINVAL;
|
|
ret = devm_request_threaded_irq(&pdev->dev, res->start, NULL,
|
|
vdoa_irq_handler, IRQF_ONESHOT,
|
|
"vdoa", vdoa);
|
|
if (ret < 0) {
|
|
dev_err(vdoa->dev, "Failed to get irq\n");
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, vdoa);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vdoa_remove(struct platform_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id vdoa_dt_ids[] = {
|
|
{ .compatible = "fsl,imx6q-vdoa" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, vdoa_dt_ids);
|
|
|
|
static struct platform_driver vdoa_driver = {
|
|
.probe = vdoa_probe,
|
|
.remove = vdoa_remove,
|
|
.driver = {
|
|
.name = VDOA_NAME,
|
|
.of_match_table = vdoa_dt_ids,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(vdoa_driver);
|
|
|
|
MODULE_DESCRIPTION("Video Data Order Adapter");
|
|
MODULE_AUTHOR("Philipp Zabel <philipp.zabel@gmail.com>");
|
|
MODULE_ALIAS("platform:imx-vdoa");
|
|
MODULE_LICENSE("GPL");
|