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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - drivers/remoteproc/qcom_mdt_loader.c
2 * Qualcomm Peripheral Image Loader
4 * Copyright (C) 2016 Linaro Ltd
5 * Copyright (C) 2015 Sony Mobile Communications Inc
6 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include <linux/elf.h>
19 #include <linux/firmware.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/remoteproc.h>
23 #include <linux/sizes.h>
24 #include <linux/slab.h>
26 #include "remoteproc_internal.h"
27 #include "qcom_mdt_loader.h"
30 * qcom_mdt_find_rsc_table() - provide dummy resource table for remoteproc
31 * @rproc: remoteproc handle
32 * @fw: firmware header
33 * @tablesz: outgoing size of the table
35 * Returns a dummy table.
37 struct resource_table
*qcom_mdt_find_rsc_table(struct rproc
*rproc
,
38 const struct firmware
*fw
,
41 static struct resource_table table
= { .ver
= 1, };
43 *tablesz
= sizeof(table
);
46 EXPORT_SYMBOL_GPL(qcom_mdt_find_rsc_table
);
49 * qcom_mdt_parse() - extract useful parameters from the mdt header
50 * @fw: firmware handle
51 * @fw_addr: optional reference for base of the firmware's memory region
52 * @fw_size: optional reference for size of the firmware's memory region
53 * @fw_relocate: optional reference for flagging if the firmware is relocatable
55 * Returns 0 on success, negative errno otherwise.
57 int qcom_mdt_parse(const struct firmware
*fw
, phys_addr_t
*fw_addr
,
58 size_t *fw_size
, bool *fw_relocate
)
60 const struct elf32_phdr
*phdrs
;
61 const struct elf32_phdr
*phdr
;
62 const struct elf32_hdr
*ehdr
;
63 phys_addr_t min_addr
= (phys_addr_t
)ULLONG_MAX
;
64 phys_addr_t max_addr
= 0;
65 bool relocate
= false;
68 ehdr
= (struct elf32_hdr
*)fw
->data
;
69 phdrs
= (struct elf32_phdr
*)(ehdr
+ 1);
71 for (i
= 0; i
< ehdr
->e_phnum
; i
++) {
74 if (phdr
->p_type
!= PT_LOAD
)
77 if ((phdr
->p_flags
& QCOM_MDT_TYPE_MASK
) == QCOM_MDT_TYPE_HASH
)
83 if (phdr
->p_flags
& QCOM_MDT_RELOCATABLE
)
86 if (phdr
->p_paddr
< min_addr
)
87 min_addr
= phdr
->p_paddr
;
89 if (phdr
->p_paddr
+ phdr
->p_memsz
> max_addr
)
90 max_addr
= ALIGN(phdr
->p_paddr
+ phdr
->p_memsz
, SZ_4K
);
96 *fw_size
= max_addr
- min_addr
;
98 *fw_relocate
= relocate
;
102 EXPORT_SYMBOL_GPL(qcom_mdt_parse
);
105 * qcom_mdt_load() - load the firmware which header is defined in fw
106 * @rproc: rproc handle
107 * @fw: frimware object for the header
108 * @firmware: filename of the firmware, for building .bXX names
110 * Returns 0 on success, negative errno otherwise.
112 int qcom_mdt_load(struct rproc
*rproc
,
113 const struct firmware
*fw
,
114 const char *firmware
)
116 const struct elf32_phdr
*phdrs
;
117 const struct elf32_phdr
*phdr
;
118 const struct elf32_hdr
*ehdr
;
119 const struct firmware
*seg_fw
;
126 ehdr
= (struct elf32_hdr
*)fw
->data
;
127 phdrs
= (struct elf32_phdr
*)(ehdr
+ 1);
129 fw_name_len
= strlen(firmware
);
130 if (fw_name_len
<= 4)
133 fw_name
= kstrdup(firmware
, GFP_KERNEL
);
137 for (i
= 0; i
< ehdr
->e_phnum
; i
++) {
140 if (phdr
->p_type
!= PT_LOAD
)
143 if ((phdr
->p_flags
& QCOM_MDT_TYPE_MASK
) == QCOM_MDT_TYPE_HASH
)
149 ptr
= rproc_da_to_va(rproc
, phdr
->p_paddr
, phdr
->p_memsz
);
151 dev_err(&rproc
->dev
, "segment outside memory range\n");
156 if (phdr
->p_filesz
) {
157 sprintf(fw_name
+ fw_name_len
- 3, "b%02d", i
);
158 ret
= request_firmware(&seg_fw
, fw_name
, &rproc
->dev
);
160 dev_err(&rproc
->dev
, "failed to load %s\n",
165 memcpy(ptr
, seg_fw
->data
, seg_fw
->size
);
167 release_firmware(seg_fw
);
170 if (phdr
->p_memsz
> phdr
->p_filesz
)
171 memset(ptr
+ phdr
->p_filesz
, 0, phdr
->p_memsz
- phdr
->p_filesz
);
178 EXPORT_SYMBOL_GPL(qcom_mdt_load
);
180 MODULE_DESCRIPTION("Firmware parser for Qualcomm MDT format");
181 MODULE_LICENSE("GPL v2");