99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
/*
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* Copyright (C) 2017 Linaro Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/device.h>
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#include <linux/firmware.h>
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/qcom_scm.h>
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#include <linux/sizes.h>
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#include <linux/soc/qcom/mdt_loader.h>
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#include "firmware.h"
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#define VENUS_PAS_ID 9
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#define VENUS_FW_MEM_SIZE (6 * SZ_1M)
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int venus_boot(struct device *dev, const char *fwname)
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{
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const struct firmware *mdt;
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struct device_node *node;
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phys_addr_t mem_phys;
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struct resource r;
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ssize_t fw_size;
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size_t mem_size;
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void *mem_va;
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int ret;
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if (!IS_ENABLED(CONFIG_QCOM_MDT_LOADER) || !qcom_scm_is_available())
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return -EPROBE_DEFER;
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node = of_parse_phandle(dev->of_node, "memory-region", 0);
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if (!node) {
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dev_err(dev, "no memory-region specified\n");
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return -EINVAL;
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}
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ret = of_address_to_resource(node, 0, &r);
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if (ret)
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return ret;
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mem_phys = r.start;
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mem_size = resource_size(&r);
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if (mem_size < VENUS_FW_MEM_SIZE)
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return -EINVAL;
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mem_va = memremap(r.start, mem_size, MEMREMAP_WC);
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if (!mem_va) {
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dev_err(dev, "unable to map memory region: %pa+%zx\n",
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&r.start, mem_size);
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return -ENOMEM;
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}
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ret = request_firmware(&mdt, fwname, dev);
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if (ret < 0)
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goto err_unmap;
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fw_size = qcom_mdt_get_size(mdt);
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if (fw_size < 0) {
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ret = fw_size;
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release_firmware(mdt);
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goto err_unmap;
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}
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ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID, mem_va, mem_phys,
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mem_size, NULL);
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release_firmware(mdt);
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if (ret)
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goto err_unmap;
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ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
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if (ret)
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goto err_unmap;
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err_unmap:
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memunmap(mem_va);
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return ret;
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}
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int venus_shutdown(struct device *dev)
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{
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return qcom_scm_pas_shutdown(VENUS_PAS_ID);
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}
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