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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2021 MediaTek Inc.
* Author: Yunfei Dong <yunfei.dong@mediatek.com>
*/
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include "mtk_vcodec_drv.h"
#include "mtk_vcodec_dec.h"
#include "mtk_vcodec_dec_hw.h"
#include "mtk_vcodec_dec_pm.h"
#include "mtk_vcodec_intr.h"
#include "mtk_vcodec_util.h"
static const struct of_device_id mtk_vdec_hw_match[] = {
{
.compatible = "mediatek,mtk-vcodec-lat",
.data = (void *)MTK_VDEC_LAT0,
},
{
.compatible = "mediatek,mtk-vcodec-core",
.data = (void *)MTK_VDEC_CORE,
},
{
.compatible = "mediatek,mtk-vcodec-lat-soc",
.data = (void *)MTK_VDEC_LAT_SOC,
},
{},
};
MODULE_DEVICE_TABLE(of, mtk_vdec_hw_match);
static int mtk_vdec_hw_prob_done(struct mtk_vcodec_dev *vdec_dev)
{
struct platform_device *pdev = vdec_dev->plat_dev;
struct device_node *subdev_node;
enum mtk_vdec_hw_id hw_idx;
const struct of_device_id *of_id;
int i;
for (i = 0; i < ARRAY_SIZE(mtk_vdec_hw_match); i++) {
of_id = &mtk_vdec_hw_match[i];
subdev_node = of_find_compatible_node(NULL, NULL,
of_id->compatible);
if (!subdev_node)
continue;
of_node_put(subdev_node);
hw_idx = (enum mtk_vdec_hw_id)(uintptr_t)of_id->data;
if (!test_bit(hw_idx, vdec_dev->subdev_bitmap)) {
dev_err(&pdev->dev, "vdec %d is not ready", hw_idx);
return -EAGAIN;
}
}
return 0;
}
static irqreturn_t mtk_vdec_hw_irq_handler(int irq, void *priv)
{
struct mtk_vdec_hw_dev *dev = priv;
struct mtk_vcodec_ctx *ctx;
u32 cg_status;
unsigned int dec_done_status;
void __iomem *vdec_misc_addr = dev->reg_base[VDEC_HW_MISC] +
VDEC_IRQ_CFG_REG;
ctx = mtk_vcodec_get_curr_ctx(dev->main_dev, dev->hw_idx);
/* check if HW active or not */
cg_status = readl(dev->reg_base[VDEC_HW_SYS]);
if (cg_status & VDEC_HW_ACTIVE) {
mtk_v4l2_err("vdec active is not 0x0 (0x%08x)",
cg_status);
return IRQ_HANDLED;
}
dec_done_status = readl(vdec_misc_addr);
if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
return IRQ_HANDLED;
/* clear interrupt */
writel(dec_done_status | VDEC_IRQ_CFG, vdec_misc_addr);
writel(dec_done_status & ~VDEC_IRQ_CLR, vdec_misc_addr);
wake_up_ctx(ctx, MTK_INST_IRQ_RECEIVED, dev->hw_idx);
mtk_v4l2_debug(3, "wake up ctx %d, dec_done_status=%x",
ctx->id, dec_done_status);
return IRQ_HANDLED;
}
static int mtk_vdec_hw_init_irq(struct mtk_vdec_hw_dev *dev)
{
struct platform_device *pdev = dev->plat_dev;
int ret;
dev->dec_irq = platform_get_irq(pdev, 0);
if (dev->dec_irq < 0)
return dev->dec_irq;
irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
ret = devm_request_irq(&pdev->dev, dev->dec_irq,
mtk_vdec_hw_irq_handler, 0, pdev->name, dev);
if (ret) {
dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
dev->dec_irq, ret);
return ret;
}
return 0;
}
static int mtk_vdec_hw_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mtk_vdec_hw_dev *subdev_dev;
struct mtk_vcodec_dev *main_dev;
const struct of_device_id *of_id;
int hw_idx;
int ret;
if (!dev->parent) {
dev_err(dev, "no parent for hardware devices.\n");
return -ENODEV;
}
main_dev = dev_get_drvdata(dev->parent);
if (!main_dev) {
dev_err(dev, "failed to get parent driver data");
return -EINVAL;
}
subdev_dev = devm_kzalloc(dev, sizeof(*subdev_dev), GFP_KERNEL);
if (!subdev_dev)
return -ENOMEM;
subdev_dev->plat_dev = pdev;
ret = mtk_vcodec_init_dec_clk(pdev, &subdev_dev->pm);
if (ret)
return ret;
ret = devm_pm_runtime_enable(&pdev->dev);
if (ret)
return ret;
of_id = of_match_device(mtk_vdec_hw_match, dev);
if (!of_id) {
dev_err(dev, "Can't get vdec subdev id.\n");
return -EINVAL;
}
hw_idx = (enum mtk_vdec_hw_id)(uintptr_t)of_id->data;
if (hw_idx >= MTK_VDEC_HW_MAX) {
dev_err(dev, "Hardware index %d not correct.\n", hw_idx);
return -EINVAL;
}
main_dev->subdev_dev[hw_idx] = subdev_dev;
subdev_dev->hw_idx = hw_idx;
subdev_dev->main_dev = main_dev;
subdev_dev->reg_base[VDEC_HW_SYS] = main_dev->reg_base[VDEC_HW_SYS];
set_bit(subdev_dev->hw_idx, main_dev->subdev_bitmap);
if (IS_SUPPORT_VDEC_HW_IRQ(hw_idx)) {
ret = mtk_vdec_hw_init_irq(subdev_dev);
if (ret)
return ret;
}
subdev_dev->reg_base[VDEC_HW_MISC] =
devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR((__force void *)subdev_dev->reg_base[VDEC_HW_MISC])) {
ret = PTR_ERR((__force void *)subdev_dev->reg_base[VDEC_HW_MISC]);
return ret;
}
if (!main_dev->subdev_prob_done)
main_dev->subdev_prob_done = mtk_vdec_hw_prob_done;
platform_set_drvdata(pdev, subdev_dev);
return 0;
}
static struct platform_driver mtk_vdec_driver = {
.probe = mtk_vdec_hw_probe,
.driver = {
.name = "mtk-vdec-comp",
.of_match_table = mtk_vdec_hw_match,
},
};
module_platform_driver(mtk_vdec_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Mediatek video decoder hardware driver");
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