1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2020 Rockchip Electronics Co., Ltd 4 */ 5 #include <common.h> 6 #include <dm.h> 7 #include <misc.h> 8 #include <dm/uclass.h> 9 #include <dm/uclass-internal.h> 10 11 #define HEAD_CRC 2 12 #define EXTRA_FIELD 4 13 #define ORIG_NAME 8 14 #define COMMENT 0x10 15 #define RESERVED 0xe0 16 #define DEFLATED 8 17 18 static u32 misc_decomp_async, misc_decomp_sync; 19 20 static void decomp_set_flags(u32 *flags, u8 comp) 21 { 22 if (comp == IH_COMP_GZIP) 23 *flags |= DECOM_GZIP; 24 else if (comp == IH_COMP_LZ4) 25 *flags |= DECOM_LZ4; 26 } 27 28 void misc_decompress_async(u8 comp) 29 { 30 decomp_set_flags(&misc_decomp_async, comp); 31 } 32 33 void misc_decompress_sync(u8 comp) 34 { 35 decomp_set_flags(&misc_decomp_sync, comp); 36 } 37 38 static int misc_gzip_parse_header(const unsigned char *src, unsigned long len) 39 { 40 int i, flags; 41 42 /* skip header */ 43 i = 10; 44 flags = src[3]; 45 if (src[2] != DEFLATED || (flags & RESERVED) != 0) { 46 debug("Error: Bad gzipped data\n"); 47 return (-1); 48 } 49 if ((flags & EXTRA_FIELD) != 0) 50 i = 12 + src[10] + (src[11] << 8); 51 if ((flags & ORIG_NAME) != 0) 52 while (src[i++] != 0) 53 ; 54 if ((flags & COMMENT) != 0) 55 while (src[i++] != 0) 56 ; 57 if ((flags & HEAD_CRC) != 0) 58 i += 2; 59 if (i >= len) { 60 puts("Error: gunzip out of data in header\n"); 61 return (-1); 62 } 63 return i; 64 } 65 66 static u32 misc_get_data_size(unsigned long src, unsigned long len, u32 cap) 67 { 68 if (cap == DECOM_GZIP) 69 return *(u32 *)(src + len - 4); 70 71 return 0; 72 } 73 74 static struct udevice *misc_decompress_get_device(u32 capability) 75 { 76 return misc_get_device_by_capability(capability); 77 } 78 79 static int misc_decompress_start(struct udevice *dev, unsigned long dst, 80 unsigned long src, unsigned long src_len, 81 u32 flags) 82 { 83 struct decom_param param; 84 85 param.addr_dst = dst; 86 param.addr_src = src; 87 param.flags = flags; 88 if (misc_gzip_parse_header((unsigned char *)src, 0xffff) > 0) { 89 param.mode = DECOM_GZIP; 90 } else { 91 printf("Unsupported decompression format.\n"); 92 return -EPERM; 93 } 94 95 param.size_src = src_len; 96 param.size_dst = misc_get_data_size(src, src_len, param.mode); 97 98 if (!param.size_src || !param.size_dst) 99 return -EINVAL; 100 101 return misc_ioctl(dev, IOCTL_REQ_START, ¶m); 102 } 103 104 static int misc_decompress_stop(struct udevice *dev) 105 { 106 return misc_ioctl(dev, IOCTL_REQ_STOP, NULL); 107 } 108 109 static bool misc_decompress_is_complete(struct udevice *dev) 110 { 111 if (misc_ioctl(dev, IOCTL_REQ_POLL, NULL)) 112 return false; 113 else 114 return true; 115 } 116 117 static int misc_decompress_data_size(struct udevice *dev, u64 *size, u32 cap) 118 { 119 struct decom_param param; 120 int ret; 121 122 param.mode = cap; 123 param.size_dst = 0; /* clear */ 124 125 ret = misc_ioctl(dev, IOCTL_REQ_DATA_SIZE, ¶m); 126 if (!ret) 127 *size = param.size_dst; 128 129 return ret; 130 } 131 132 static int misc_decompress_finish(struct udevice *dev, u32 cap) 133 { 134 int timeout = 10000; 135 136 while (!misc_decompress_is_complete(dev)) { 137 if (timeout < 0) 138 return -EIO; 139 timeout--; 140 udelay(10); 141 } 142 143 return misc_decompress_stop(dev); 144 } 145 146 int misc_decompress_cleanup(void) 147 { 148 const struct misc_ops *ops; 149 struct udevice *dev; 150 struct uclass *uc; 151 int ret; 152 u32 cap; 153 154 ret = uclass_get(UCLASS_MISC, &uc); 155 if (ret) 156 return 0; 157 158 /* use "find_" */ 159 for (uclass_find_first_device(UCLASS_MISC, &dev); 160 dev; 161 uclass_find_next_device(&dev)) { 162 ops = device_get_ops(dev); 163 if (!ops || !ops->ioctl) 164 continue; 165 else if (ops->ioctl(dev, IOCTL_REQ_CAPABILITY, &cap)) 166 continue; 167 else if (misc_decomp_async & cap) 168 continue; 169 170 if (misc_decomp_sync & cap) { 171 ret = misc_decompress_finish(dev, cap); 172 if (ret) { 173 printf("Failed to stop decompress: %s, ret=%d\n", 174 dev->name, ret); 175 return ret; 176 } 177 } 178 } 179 180 return 0; 181 } 182 183 int misc_decompress_process(unsigned long dst, unsigned long src, 184 unsigned long src_len, u32 cap, bool sync, 185 u64 *size, u32 flags) 186 { 187 struct udevice *dev; 188 ulong dst_org = dst; 189 u64 dst_size = 0; 190 int ret; 191 192 dev = misc_decompress_get_device(cap); 193 if (!dev) 194 return -ENODEV; 195 196 /* Wait last finish */ 197 ret = misc_decompress_finish(dev, cap); 198 if (ret) 199 return ret; 200 201 /* 202 * Check if ARCH_DMA_MINALIGN aligned, otherwise use sync action 203 * for output data memcpy. 204 */ 205 if (!IS_ALIGNED(dst, ARCH_DMA_MINALIGN)) { 206 dst_org = dst; 207 dst = ALIGN(dst, ARCH_DMA_MINALIGN); 208 sync = true; 209 } 210 211 ret = misc_decompress_start(dev, dst, src, src_len, flags); 212 if (ret) 213 return ret; 214 215 /* 216 * Wait this round finish ? 217 * 218 * If sync, return original data length after decompress done. 219 * otherwise return from compressed file information. 220 */ 221 if (sync) { 222 ret = misc_decompress_finish(dev, cap); 223 if (ret) 224 return ret; 225 226 if (size || (dst != dst_org)) { 227 ret = misc_decompress_data_size(dev, &dst_size, cap); 228 if (size) 229 *size = dst_size; 230 if (dst != dst_org) 231 memcpy((char *)dst_org, 232 (const char *)dst, dst_size); 233 } 234 } else { 235 if (size) 236 *size = misc_get_data_size(src, src_len, cap); 237 } 238 239 return ret; 240 } 241