From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/drivers/soc/qcom/mdt_loader.c | 98 +++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 86 insertions(+), 12 deletions(-)
diff --git a/kernel/drivers/soc/qcom/mdt_loader.c b/kernel/drivers/soc/qcom/mdt_loader.c
index 47dffe7..6034cd8 100644
--- a/kernel/drivers/soc/qcom/mdt_loader.c
+++ b/kernel/drivers/soc/qcom/mdt_loader.c
@@ -1,18 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Qualcomm Peripheral Image Loader
*
* Copyright (C) 2016 Linaro Ltd
* Copyright (C) 2015 Sony Mobile Communications Inc
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * 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>
@@ -74,6 +66,66 @@
}
EXPORT_SYMBOL_GPL(qcom_mdt_get_size);
+/**
+ * qcom_mdt_read_metadata() - read header and metadata from mdt or mbn
+ * @fw: firmware of mdt header or mbn
+ * @data_len: length of the read metadata blob
+ *
+ * The mechanism that performs the authentication of the loading firmware
+ * expects an ELF header directly followed by the segment of hashes, with no
+ * padding inbetween. This function allocates a chunk of memory for this pair
+ * and copy the two pieces into the buffer.
+ *
+ * In the case of split firmware the hash is found directly following the ELF
+ * header, rather than at p_offset described by the second program header.
+ *
+ * The caller is responsible to free (kfree()) the returned pointer.
+ *
+ * Return: pointer to data, or ERR_PTR()
+ */
+void *qcom_mdt_read_metadata(const struct firmware *fw, size_t *data_len)
+{
+ const struct elf32_phdr *phdrs;
+ const struct elf32_hdr *ehdr;
+ size_t hash_offset;
+ size_t hash_size;
+ size_t ehdr_size;
+ void *data;
+
+ ehdr = (struct elf32_hdr *)fw->data;
+ phdrs = (struct elf32_phdr *)(ehdr + 1);
+
+ if (ehdr->e_phnum < 2)
+ return ERR_PTR(-EINVAL);
+
+ if (phdrs[0].p_type == PT_LOAD)
+ return ERR_PTR(-EINVAL);
+
+ if ((phdrs[1].p_flags & QCOM_MDT_TYPE_MASK) != QCOM_MDT_TYPE_HASH)
+ return ERR_PTR(-EINVAL);
+
+ ehdr_size = phdrs[0].p_filesz;
+ hash_size = phdrs[1].p_filesz;
+
+ data = kmalloc(ehdr_size + hash_size, GFP_KERNEL);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+
+ /* Is the header and hash already packed */
+ if (ehdr_size + hash_size == fw->size)
+ hash_offset = phdrs[0].p_filesz;
+ else
+ hash_offset = phdrs[1].p_offset;
+
+ memcpy(data, fw->data, ehdr_size);
+ memcpy(data + ehdr_size, fw->data + hash_offset, hash_size);
+
+ *data_len = ehdr_size + hash_size;
+
+ return data;
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_read_metadata);
+
static int __qcom_mdt_load(struct device *dev, const struct firmware *fw,
const char *firmware, int pas_id, void *mem_region,
phys_addr_t mem_phys, size_t mem_size,
@@ -86,12 +138,14 @@
phys_addr_t mem_reloc;
phys_addr_t min_addr = PHYS_ADDR_MAX;
phys_addr_t max_addr = 0;
+ size_t metadata_len;
size_t fw_name_len;
ssize_t offset;
+ void *metadata;
char *fw_name;
bool relocate = false;
void *ptr;
- int ret;
+ int ret = 0;
int i;
if (!fw || !mem_region || !mem_phys || !mem_size)
@@ -109,7 +163,15 @@
return -ENOMEM;
if (pas_init) {
- ret = qcom_scm_pas_init_image(pas_id, fw->data, fw->size);
+ metadata = qcom_mdt_read_metadata(fw, &metadata_len);
+ if (IS_ERR(metadata)) {
+ ret = PTR_ERR(metadata);
+ goto out;
+ }
+
+ ret = qcom_scm_pas_init_image(pas_id, metadata, metadata_len);
+
+ kfree(metadata);
if (ret) {
dev_err(dev, "invalid firmware metadata\n");
goto out;
@@ -178,7 +240,19 @@
ptr = mem_region + offset;
- if (phdr->p_filesz) {
+ if (phdr->p_filesz && phdr->p_offset < fw->size) {
+ /* Firmware is large enough to be non-split */
+ if (phdr->p_offset + phdr->p_filesz > fw->size) {
+ dev_err(dev,
+ "failed to load segment %d from truncated file %s\n",
+ i, firmware);
+ ret = -EINVAL;
+ break;
+ }
+
+ memcpy(ptr, fw->data + phdr->p_offset, phdr->p_filesz);
+ } else if (phdr->p_filesz) {
+ /* Firmware not large enough, load split-out segments */
sprintf(fw_name + fw_name_len - 3, "b%02d", i);
ret = request_firmware_into_buf(&seg_fw, fw_name, dev,
ptr, phdr->p_filesz);
--
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