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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/qcom_scm.h>
#include <linux/sizes.h>
#include <linux/soc/qcom/mdt_loader.h>
#include "firmware.h"
#define VENUS_PAS_ID 9
#define VENUS_FW_MEM_SIZE (6 * SZ_1M)
int venus_boot(struct device *dev, const char *fwname)
{
const struct firmware *mdt;
struct device_node *node;
phys_addr_t mem_phys;
struct resource r;
ssize_t fw_size;
size_t mem_size;
void *mem_va;
int ret;
if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) || !qcom_scm_is_available())
return -EPROBE_DEFER;
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;
}
ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID, mem_va, mem_phys,
mem_size);
release_firmware(mdt);
if (ret)
goto err_unmap;
ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
if (ret)
goto err_unmap;
err_unmap:
memunmap(mem_va);
return ret;
}
int venus_shutdown(struct device *dev)
{
return qcom_scm_pas_shutdown(VENUS_PAS_ID);
}
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