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/*
* Copyright (c) 2015, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/host1x.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <soc/tegra/pmc.h>
#include "drm.h"
#include "falcon.h"
#include "vic.h"
struct vic_config {
const char *firmware;
};
struct vic {
struct falcon falcon;
bool booted;
void __iomem *regs;
struct tegra_drm_client client;
struct host1x_channel *channel;
struct iommu_domain *domain;
struct device *dev;
struct clk *clk;
/* Platform configuration */
const struct vic_config *config;
};
static inline struct vic *to_vic(struct tegra_drm_client *client)
{
return container_of(client, struct vic, client);
}
static void vic_writel(struct vic *vic, u32 value, unsigned int offset)
{
writel(value, vic->regs + offset);
}
static int vic_runtime_resume(struct device *dev)
{
struct vic *vic = dev_get_drvdata(dev);
return clk_prepare_enable(vic->clk);
}
static int vic_runtime_suspend(struct device *dev)
{
struct vic *vic = dev_get_drvdata(dev);
clk_disable_unprepare(vic->clk);
vic->booted = false;
return 0;
}
static int vic_boot(struct vic *vic)
{
u32 fce_ucode_size, fce_bin_data_offset;
void *hdr;
int err = 0;
if (vic->booted)
return 0;
/* setup clockgating registers */
vic_writel(vic, CG_IDLE_CG_DLY_CNT(4) |
CG_IDLE_CG_EN |
CG_WAKEUP_DLY_CNT(4),
NV_PVIC_MISC_PRI_VIC_CG);
err = falcon_boot(&vic->falcon);
if (err < 0)
return err;
hdr = vic->falcon.firmware.vaddr;
fce_bin_data_offset = *(u32 *)(hdr + VIC_UCODE_FCE_DATA_OFFSET);
hdr = vic->falcon.firmware.vaddr +
*(u32 *)(hdr + VIC_UCODE_FCE_HEADER_OFFSET);
fce_ucode_size = *(u32 *)(hdr + FCE_UCODE_SIZE_OFFSET);
falcon_execute_method(&vic->falcon, VIC_SET_APPLICATION_ID, 1);
falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_SIZE,
fce_ucode_size);
falcon_execute_method(&vic->falcon, VIC_SET_FCE_UCODE_OFFSET,
(vic->falcon.firmware.paddr + fce_bin_data_offset)
>> 8);
err = falcon_wait_idle(&vic->falcon);
if (err < 0) {
dev_err(vic->dev,
"failed to set application ID and FCE base\n");
return err;
}
vic->booted = true;
return 0;
}
static void *vic_falcon_alloc(struct falcon *falcon, size_t size,
dma_addr_t *iova)
{
struct tegra_drm *tegra = falcon->data;
return tegra_drm_alloc(tegra, size, iova);
}
static void vic_falcon_free(struct falcon *falcon, size_t size,
dma_addr_t iova, void *va)
{
struct tegra_drm *tegra = falcon->data;
return tegra_drm_free(tegra, size, va, iova);
}
static const struct falcon_ops vic_falcon_ops = {
.alloc = vic_falcon_alloc,
.free = vic_falcon_free
};
static int vic_init(struct host1x_client *client)
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct drm_device *dev = dev_get_drvdata(client->parent);
struct tegra_drm *tegra = dev->dev_private;
struct vic *vic = to_vic(drm);
int err;
if (tegra->domain) {
err = iommu_attach_device(tegra->domain, vic->dev);
if (err < 0) {
dev_err(vic->dev, "failed to attach to domain: %d\n",
err);
return err;
}
vic->domain = tegra->domain;
}
if (!vic->falcon.data) {
vic->falcon.data = tegra;
err = falcon_load_firmware(&vic->falcon);
if (err < 0)
goto detach_device;
}
vic->channel = host1x_channel_request(client->dev);
if (!vic->channel) {
err = -ENOMEM;
goto detach_device;
}
client->syncpts[0] = host1x_syncpt_request(client, 0);
if (!client->syncpts[0]) {
err = -ENOMEM;
goto free_channel;
}
err = tegra_drm_register_client(tegra, drm);
if (err < 0)
goto free_syncpt;
return 0;
free_syncpt:
host1x_syncpt_free(client->syncpts[0]);
free_channel:
host1x_channel_put(vic->channel);
detach_device:
if (tegra->domain)
iommu_detach_device(tegra->domain, vic->dev);
return err;
}
static int vic_exit(struct host1x_client *client)
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct drm_device *dev = dev_get_drvdata(client->parent);
struct tegra_drm *tegra = dev->dev_private;
struct vic *vic = to_vic(drm);
int err;
err = tegra_drm_unregister_client(tegra, drm);
if (err < 0)
return err;
host1x_syncpt_free(client->syncpts[0]);
host1x_channel_put(vic->channel);
if (vic->domain) {
iommu_detach_device(vic->domain, vic->dev);
vic->domain = NULL;
}
return 0;
}
static const struct host1x_client_ops vic_client_ops = {
.init = vic_init,
.exit = vic_exit,
};
static int vic_open_channel(struct tegra_drm_client *client,
struct tegra_drm_context *context)
{
struct vic *vic = to_vic(client);
int err;
err = pm_runtime_get_sync(vic->dev);
if (err < 0)
return err;
err = vic_boot(vic);
if (err < 0) {
pm_runtime_put(vic->dev);
return err;
}
context->channel = host1x_channel_get(vic->channel);
if (!context->channel) {
pm_runtime_put(vic->dev);
return -ENOMEM;
}
return 0;
}
static void vic_close_channel(struct tegra_drm_context *context)
{
struct vic *vic = to_vic(context->client);
host1x_channel_put(context->channel);
pm_runtime_put(vic->dev);
}
static const struct tegra_drm_client_ops vic_ops = {
.open_channel = vic_open_channel,
.close_channel = vic_close_channel,
.submit = tegra_drm_submit,
};
#define NVIDIA_TEGRA_124_VIC_FIRMWARE "nvidia/tegra124/vic03_ucode.bin"
static const struct vic_config vic_t124_config = {
.firmware = NVIDIA_TEGRA_124_VIC_FIRMWARE,
};
#define NVIDIA_TEGRA_210_VIC_FIRMWARE "nvidia/tegra210/vic04_ucode.bin"
static const struct vic_config vic_t210_config = {
.firmware = NVIDIA_TEGRA_210_VIC_FIRMWARE,
};
static const struct of_device_id vic_match[] = {
{ .compatible = "nvidia,tegra124-vic", .data = &vic_t124_config },
{ .compatible = "nvidia,tegra210-vic", .data = &vic_t210_config },
{ },
};
static int vic_probe(struct platform_device *pdev)
{
struct vic_config *vic_config = NULL;
struct device *dev = &pdev->dev;
struct host1x_syncpt **syncpts;
struct resource *regs;
const struct of_device_id *match;
struct vic *vic;
int err;
match = of_match_device(vic_match, dev);
vic_config = (struct vic_config *)match->data;
vic = devm_kzalloc(dev, sizeof(*vic), GFP_KERNEL);
if (!vic)
return -ENOMEM;
syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
if (!syncpts)
return -ENOMEM;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs) {
dev_err(&pdev->dev, "failed to get registers\n");
return -ENXIO;
}
vic->regs = devm_ioremap_resource(dev, regs);
if (IS_ERR(vic->regs))
return PTR_ERR(vic->regs);
vic->clk = devm_clk_get(dev, NULL);
if (IS_ERR(vic->clk)) {
dev_err(&pdev->dev, "failed to get clock\n");
return PTR_ERR(vic->clk);
}
vic->falcon.dev = dev;
vic->falcon.regs = vic->regs;
vic->falcon.ops = &vic_falcon_ops;
err = falcon_init(&vic->falcon);
if (err < 0)
return err;
err = falcon_read_firmware(&vic->falcon, vic_config->firmware);
if (err < 0)
goto exit_falcon;
platform_set_drvdata(pdev, vic);
INIT_LIST_HEAD(&vic->client.base.list);
vic->client.base.ops = &vic_client_ops;
vic->client.base.dev = dev;
vic->client.base.class = HOST1X_CLASS_VIC;
vic->client.base.syncpts = syncpts;
vic->client.base.num_syncpts = 1;
vic->dev = dev;
vic->config = vic_config;
INIT_LIST_HEAD(&vic->client.list);
vic->client.ops = &vic_ops;
err = host1x_client_register(&vic->client.base);
if (err < 0) {
dev_err(dev, "failed to register host1x client: %d\n", err);
platform_set_drvdata(pdev, NULL);
goto exit_falcon;
}
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
err = vic_runtime_resume(&pdev->dev);
if (err < 0)
goto unregister_client;
}
return 0;
unregister_client:
host1x_client_unregister(&vic->client.base);
exit_falcon:
falcon_exit(&vic->falcon);
return err;
}
static int vic_remove(struct platform_device *pdev)
{
struct vic *vic = platform_get_drvdata(pdev);
int err;
err = host1x_client_unregister(&vic->client.base);
if (err < 0) {
dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
err);
return err;
}
if (pm_runtime_enabled(&pdev->dev))
pm_runtime_disable(&pdev->dev);
else
vic_runtime_suspend(&pdev->dev);
falcon_exit(&vic->falcon);
return 0;
}
static const struct dev_pm_ops vic_pm_ops = {
SET_RUNTIME_PM_OPS(vic_runtime_suspend, vic_runtime_resume, NULL)
};
struct platform_driver tegra_vic_driver = {
.driver = {
.name = "tegra-vic",
.of_match_table = vic_match,
.pm = &vic_pm_ops
},
.probe = vic_probe,
.remove = vic_remove,
};
#if IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC)
MODULE_FIRMWARE(NVIDIA_TEGRA_124_VIC_FIRMWARE);
#endif
#if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
MODULE_FIRMWARE(NVIDIA_TEGRA_210_VIC_FIRMWARE);
#endif
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