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// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <drm/drm_print.h>
#include "komeda_dev.h"
static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
{
struct komeda_pipeline *pipe;
struct clk *clk;
u32 pipe_id;
int ret = 0;
ret = of_property_read_u32(np, "reg", &pipe_id);
if (ret != 0 || pipe_id >= mdev->n_pipelines)
return -EINVAL;
pipe = mdev->pipelines[pipe_id];
clk = of_clk_get_by_name(np, "aclk");
if (IS_ERR(clk)) {
DRM_ERROR("get aclk for pipeline %d failed!\n", pipe_id);
return PTR_ERR(clk);
}
pipe->aclk = clk;
clk = of_clk_get_by_name(np, "pxclk");
if (IS_ERR(clk)) {
DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id);
return PTR_ERR(clk);
}
pipe->pxlclk = clk;
/* enum ports */
pipe->of_output_dev =
of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
pipe->of_output_port =
of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
pipe->of_node = np;
return 0;
}
static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
{
struct device_node *child, *np = dev->of_node;
struct clk *clk;
int ret;
clk = devm_clk_get(dev, "mclk");
if (IS_ERR(clk))
return PTR_ERR(clk);
mdev->mclk = clk;
for_each_available_child_of_node(np, child) {
if (of_node_cmp(child->name, "pipeline") == 0) {
ret = komeda_parse_pipe_dt(mdev, child);
if (ret) {
DRM_ERROR("parse pipeline dt error!\n");
of_node_put(child);
break;
}
}
}
return ret;
}
struct komeda_dev *komeda_dev_create(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
const struct komeda_product_data *product;
struct komeda_dev *mdev;
struct resource *io_res;
int err = 0;
product = of_device_get_match_data(dev);
if (!product)
return ERR_PTR(-ENODEV);
io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io_res) {
DRM_ERROR("No registers defined.\n");
return ERR_PTR(-ENODEV);
}
mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
if (!mdev)
return ERR_PTR(-ENOMEM);
mdev->dev = dev;
mdev->reg_base = devm_ioremap_resource(dev, io_res);
if (IS_ERR(mdev->reg_base)) {
DRM_ERROR("Map register space failed.\n");
err = PTR_ERR(mdev->reg_base);
mdev->reg_base = NULL;
goto err_cleanup;
}
mdev->pclk = devm_clk_get(dev, "pclk");
if (IS_ERR(mdev->pclk)) {
DRM_ERROR("Get APB clk failed.\n");
err = PTR_ERR(mdev->pclk);
mdev->pclk = NULL;
goto err_cleanup;
}
/* Enable APB clock to access the registers */
clk_prepare_enable(mdev->pclk);
mdev->funcs = product->identify(mdev->reg_base, &mdev->chip);
if (!komeda_product_match(mdev, product->product_id)) {
DRM_ERROR("DT configured %x mismatch with real HW %x.\n",
product->product_id,
MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id));
err = -ENODEV;
goto err_cleanup;
}
DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",
MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),
MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
MALIDP_CORE_ID_MINOR(mdev->chip.core_id));
mdev->funcs->init_format_table(mdev);
err = mdev->funcs->enum_resources(mdev);
if (err) {
DRM_ERROR("enumerate display resource failed.\n");
goto err_cleanup;
}
err = komeda_parse_dt(dev, mdev);
if (err) {
DRM_ERROR("parse device tree failed.\n");
goto err_cleanup;
}
return mdev;
err_cleanup:
komeda_dev_destroy(mdev);
return ERR_PTR(err);
}
void komeda_dev_destroy(struct komeda_dev *mdev)
{
struct device *dev = mdev->dev;
struct komeda_dev_funcs *funcs = mdev->funcs;
int i;
for (i = 0; i < mdev->n_pipelines; i++) {
komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
mdev->pipelines[i] = NULL;
}
mdev->n_pipelines = 0;
if (funcs && funcs->cleanup)
funcs->cleanup(mdev);
if (mdev->reg_base) {
devm_iounmap(dev, mdev->reg_base);
mdev->reg_base = NULL;
}
if (mdev->mclk) {
devm_clk_put(dev, mdev->mclk);
mdev->mclk = NULL;
}
if (mdev->pclk) {
clk_disable_unprepare(mdev->pclk);
devm_clk_put(dev, mdev->pclk);
mdev->pclk = NULL;
}
devm_kfree(dev, mdev);
}
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