/*
|
* 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, NULL);
|
|
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);
|
}
|
