/*
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* Copyright 2022 Rockchip Electronics Co., Ltd
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/arch/rockchip_smccc.h>
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#include <asm/arch/vendor.h>
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#define HDCP_SIGNED 0x4B534541 /* "AESK" */
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#define HDCP_FLG_AES (1 << 0)
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struct hdcpdata {
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unsigned int signature;
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unsigned int length;
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unsigned int crc32;
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unsigned int flags;
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unsigned char data[0];
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};
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int vendor_handle_hdcp(struct vendor_item *vhead)
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{
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struct arm_smccc_res res;
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struct hdcpdata *hdcp;
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char *shm;
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u32 crc, len;
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int ret;
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hdcp = (void *)vhead + sizeof(struct vendor_item);
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if ((hdcp->signature != HDCP_SIGNED) || !(hdcp->flags & HDCP_FLG_AES))
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return 0;
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crc = crc32(0, hdcp->data, hdcp->length);
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if (crc != hdcp->crc32) {
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printf("%s: bad crc32 0x%08x != 0x%08x\n",
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__func__, crc, hdcp->crc32);
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return -EIO;
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}
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res = sip_smc_request_share_mem(2, SHARE_PAGE_TYPE_HDCP);
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if (res.a0) {
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printf("%s: Can't get share mem\n", __func__);
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return -EIO;
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}
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shm = (char *)res.a1;
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len = sizeof(struct hdcpdata) + hdcp->length;
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memcpy(shm, hdcp, len);
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flush_dcache_range((ulong)shm, (ulong)(shm + len));
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ret = sip_smc_hdcp_config(HDCP_FUNC_STORAGE_ENCRYPT, 0, 0);
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if (ret) {
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printf("%s: failed, ret=%d\n", __func__, ret);
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return -EIO;
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}
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invalidate_dcache_range((ulong)shm, (ulong)(shm + len));
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memcpy(hdcp, shm, len);
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return 0;
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}
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