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/*
* Copyright (C) 2017 Linaro Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/qcom_scm.h>
#include <linux/sizes.h>
#include <linux/soc/qcom/mdt_loader.h>
#include "core.h"
#include "firmware.h"
#include "hfi_venus_io.h"
#define VENUS_PAS_ID 9
#define VENUS_FW_MEM_SIZE (6 * SZ_1M)
#define VENUS_FW_START_ADDR 0x0
static void venus_reset_cpu(struct venus_core *core)
{
void __iomem *base = core->base;
writel(0, base + WRAPPER_FW_START_ADDR);
writel(VENUS_FW_MEM_SIZE, base + WRAPPER_FW_END_ADDR);
writel(0, base + WRAPPER_CPA_START_ADDR);
writel(VENUS_FW_MEM_SIZE, base + WRAPPER_CPA_END_ADDR);
writel(VENUS_FW_MEM_SIZE, base + WRAPPER_NONPIX_START_ADDR);
writel(VENUS_FW_MEM_SIZE, base + WRAPPER_NONPIX_END_ADDR);
writel(0x0, base + WRAPPER_CPU_CGC_DIS);
writel(0x0, base + WRAPPER_CPU_CLOCK_CONFIG);
/* Bring ARM9 out of reset */
writel(0, base + WRAPPER_A9SS_SW_RESET);
}
int venus_set_hw_state(struct venus_core *core, bool resume)
{
if (core->use_tz)
return qcom_scm_set_remote_state(resume, 0);
if (resume)
venus_reset_cpu(core);
else
writel(1, core->base + WRAPPER_A9SS_SW_RESET);
return 0;
}
static int venus_load_fw(struct venus_core *core, const char *fwname,
phys_addr_t *mem_phys, size_t *mem_size)
{
const struct firmware *mdt;
struct device_node *node;
struct device *dev;
struct resource r;
ssize_t fw_size;
void *mem_va;
int ret;
dev = core->dev;
node = of_parse_phandle(dev->of_node, "memory-region", 0);
if (!node) {
dev_err(dev, "no memory-region specified\n");
return -EINVAL;
}
ret = of_address_to_resource(node, 0, &r);
if (ret)
return ret;
*mem_phys = r.start;
*mem_size = resource_size(&r);
if (*mem_size < VENUS_FW_MEM_SIZE)
return -EINVAL;
mem_va = memremap(r.start, *mem_size, MEMREMAP_WC);
if (!mem_va) {
dev_err(dev, "unable to map memory region: %pa+%zx\n",
&r.start, *mem_size);
return -ENOMEM;
}
ret = request_firmware(&mdt, fwname, dev);
if (ret < 0)
goto err_unmap;
fw_size = qcom_mdt_get_size(mdt);
if (fw_size < 0) {
ret = fw_size;
release_firmware(mdt);
goto err_unmap;
}
if (core->use_tz)
ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID,
mem_va, *mem_phys, *mem_size, NULL);
else
ret = qcom_mdt_load_no_init(dev, mdt, fwname, VENUS_PAS_ID,
mem_va, *mem_phys, *mem_size, NULL);
release_firmware(mdt);
err_unmap:
memunmap(mem_va);
return ret;
}
int venus_boot(struct venus_core *core)
{
struct device *dev = core->dev;
phys_addr_t mem_phys;
size_t mem_size;
int ret;
if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) ||
(core->use_tz && !qcom_scm_is_available()))
return -EPROBE_DEFER;
ret = venus_load_fw(core, core->res->fwname, &mem_phys, &mem_size);
if (ret) {
dev_err(dev, "fail to load video firmware\n");
return -EINVAL;
}
return qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
}
int venus_shutdown(struct device *dev)
{
return qcom_scm_pas_shutdown(VENUS_PAS_ID);
}
int venus_firmware_init(struct venus_core *core)
{
struct platform_device_info info;
struct platform_device *pdev;
struct device_node *np;
int ret;
np = of_get_child_by_name(core->dev->of_node, "video-firmware");
if (!np) {
core->use_tz = true;
return 0;
}
memset(&info, 0, sizeof(info));
info.fwnode = &np->fwnode;
info.parent = core->dev;
info.name = np->name;
info.dma_mask = DMA_BIT_MASK(32);
pdev = platform_device_register_full(&info);
if (IS_ERR(pdev)) {
of_node_put(np);
return PTR_ERR(pdev);
}
pdev->dev.of_node = np;
ret = of_dma_configure(&pdev->dev, np, true);
if (ret) {
dev_err(core->dev, "dma configure fail\n");
goto err_unregister;
}
core->fw.dev = &pdev->dev;
of_node_put(np);
return 0;
err_unregister:
platform_device_unregister(pdev);
of_node_put(np);
return ret;
}
void venus_firmware_deinit(struct venus_core *core)
{
if (!core->fw.dev)
return;
platform_device_unregister(to_platform_device(core->fw.dev));
}
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