Nico Huber | 1f6bd94 | 2012-08-30 15:36:57 +0200 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the libpayload project. |
| 3 | * |
| 4 | * Copyright (C) 2012 secunet Security Networks AG |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include <libpayload.h> |
| 31 | #include <stdint.h> |
| 32 | #include <string.h> |
| 33 | #include <stdio.h> |
| 34 | |
| 35 | #include <storage/ata.h> |
| 36 | |
| 37 | |
| 38 | /** Reads non-sector-aligned blocks of 512 bytes. */ |
| 39 | static ssize_t ata_read_unaligned(ata_dev_t *const dev, |
| 40 | const lba_t blk_start, size_t blk_count, |
| 41 | u8 *blk_buf) |
| 42 | { |
| 43 | ssize_t ret = 0; |
| 44 | lba_t sec_start; |
| 45 | size_t blk_residue; |
| 46 | |
| 47 | u8 *const sec_buf = malloc(dev->sector_size); |
| 48 | if (sec_buf == NULL) |
| 49 | return -1; |
| 50 | |
| 51 | const size_t shift = dev->sector_size_shift - 9; |
| 52 | const size_t mask = (dev->sector_size >> 9) - 1; |
| 53 | |
| 54 | /* Sector aligned start block. */ |
| 55 | const lba_t blk_aligned = blk_start & ~mask; |
| 56 | |
| 57 | /* First sector to read from. */ |
| 58 | sec_start = blk_aligned >> shift; |
| 59 | |
| 60 | /* Calculate and read residue before sector aligned blocks. */ |
| 61 | blk_residue = MIN(blk_start - blk_aligned, blk_count); |
| 62 | if (blk_residue) { |
| 63 | if (dev->read_sectors(dev, sec_start, 1, sec_buf) != 1) |
| 64 | goto _free_ret; |
| 65 | |
| 66 | const size_t bytes = blk_residue << 9; |
| 67 | memcpy(blk_buf, sec_buf + (dev->sector_size - bytes), bytes); |
| 68 | blk_count -= blk_residue; |
| 69 | blk_buf += bytes; |
| 70 | ++sec_start; |
| 71 | |
| 72 | ret = blk_residue; |
| 73 | if (blk_count == 0) |
| 74 | goto _free_ret; |
| 75 | } |
| 76 | |
| 77 | /* Read all sector aligned blocks. */ |
| 78 | const size_t sec_count = (blk_count & ~mask) >> shift; |
| 79 | const int sec_read = dev->read_sectors( |
| 80 | dev, sec_start, sec_count, blk_buf); |
| 81 | if (sec_read < 0) |
| 82 | goto _free_ret; |
| 83 | ret += sec_read << shift; |
| 84 | if (sec_read != sec_count) |
| 85 | goto _free_ret; |
| 86 | |
| 87 | /* Calculate and read residue. */ |
| 88 | blk_residue = blk_count & mask; |
| 89 | if (blk_residue) { |
| 90 | sec_start += sec_read; |
| 91 | blk_buf += sec_read << dev->sector_size_shift; |
| 92 | |
| 93 | if (dev->read_sectors(dev, sec_start, 1, sec_buf) != 1) |
| 94 | goto _free_ret; |
| 95 | |
| 96 | const size_t bytes = blk_residue << 9; |
| 97 | memcpy(blk_buf, sec_buf, bytes); |
| 98 | ret += blk_residue; |
| 99 | } |
| 100 | |
| 101 | _free_ret: |
| 102 | free(sec_buf); |
| 103 | return ret; |
| 104 | } |
| 105 | |
| 106 | static ssize_t ata_read512(storage_dev_t *_dev, |
| 107 | const lba_t start, const size_t count, |
| 108 | unsigned char *const buf) |
| 109 | { |
| 110 | ata_dev_t *const dev = (ata_dev_t *)_dev; |
| 111 | |
| 112 | if (dev->read_sectors == NULL) { |
| 113 | printf("ata: No read support implemented.\n"); |
| 114 | return -1; |
| 115 | } |
| 116 | |
| 117 | if (dev->sector_size == 512) { |
| 118 | return dev->read_sectors(dev, start, count, buf); |
| 119 | } else if (dev->sector_size > 512) { |
| 120 | /* Sector size has to be a power of two. */ |
| 121 | const size_t mask = (dev->sector_size >> 9) - 1; |
| 122 | if (!(start & mask) && !(count & mask)) { |
| 123 | const size_t shift = dev->sector_size_shift - 9; |
| 124 | const ssize_t ret = dev->read_sectors(dev, |
| 125 | start >> shift, count >> shift, buf); |
| 126 | if (ret < 0) |
| 127 | return ret; |
| 128 | else |
| 129 | return ret << shift; |
| 130 | } else { |
| 131 | return ata_read_unaligned(dev, start, count, buf); |
| 132 | } |
| 133 | } else { |
| 134 | printf("ata: No support for sectors smaller than 512 bytes.\n"); |
| 135 | return -1; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | static ssize_t ata_write512(storage_dev_t *const dev, |
| 140 | const lba_t start, const size_t count, |
| 141 | const unsigned char *const buf) |
| 142 | { |
| 143 | printf("ata: No write support implemented.\n"); |
| 144 | return -1; |
| 145 | } |
| 146 | |
| 147 | void ata_initialize_storage_ops(ata_dev_t *const dev) |
| 148 | { |
| 149 | dev->storage_dev.read_blocks512 = ata_read512; |
| 150 | dev->storage_dev.write_blocks512 = ata_write512; |
| 151 | } |
| 152 | |
| 153 | int ata_set_sector_size(ata_dev_t *const dev, u32 sector_size) |
| 154 | { |
| 155 | if (!sector_size || (sector_size & (sector_size - 1))) { |
| 156 | printf("ata: Sector size is not a power of two (%u).\n", |
| 157 | sector_size); |
| 158 | return -1; |
| 159 | } |
| 160 | dev->sector_size = sector_size; |
| 161 | dev->sector_size_shift = 0; |
| 162 | while (sector_size >>= 1) |
| 163 | ++dev->sector_size_shift; |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | static int ata_decode_sector_size(ata_dev_t *const dev, const u16 *const id) |
| 169 | { |
| 170 | u32 size; |
| 171 | if ((id[ATA_ID_SECTOR_SIZE] & ((3 << 14) | (1 << 12))) |
| 172 | != ((1 << 14) | (1 << 12))) |
| 173 | size = DEFAULT_ATA_SECTOR_SIZE; |
| 174 | else |
| 175 | size = (id[ATA_ID_LOGICAL_SECTOR_SIZE] | |
| 176 | (id[ATA_ID_LOGICAL_SECTOR_SIZE + 1] << 16)) << 1; |
| 177 | |
| 178 | return ata_set_sector_size(dev, size); |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Copies n-1 bytes from src to dest swapping each two bytes, removes |
| 183 | * trailing spaces and terminates dest with '\0'. |
| 184 | */ |
| 185 | char *ata_strncpy(char *const dest, const u16 *const src, const size_t n) |
| 186 | { |
| 187 | int i; |
| 188 | |
| 189 | for (i = 0; i < (n - 1); i += 2) { |
| 190 | dest[i] = ((const char *)src)[i + 1]; |
| 191 | dest[i + 1] = ((const char *)src)[i]; |
| 192 | } |
| 193 | |
| 194 | for (i = n - 2; i >= 0; --i) |
| 195 | if (dest[i] != ' ') |
| 196 | break; |
| 197 | dest[i + 1] = '\0'; |
| 198 | |
| 199 | return dest; |
| 200 | } |
| 201 | |
| 202 | int ata_attach_device(ata_dev_t *const dev, const storage_port_t port_type) |
| 203 | { |
| 204 | u16 id[256]; |
| 205 | |
| 206 | dev->identify_cmd = ATA_IDENTIFY_DEVICE; |
| 207 | if (dev->identify(dev, (u8 *)id)) |
| 208 | return -1; |
| 209 | |
| 210 | char fw[9], model[41]; |
| 211 | ata_strncpy(fw, id + 23, sizeof(fw)); |
| 212 | ata_strncpy(model, id + 27, sizeof(model)); |
| 213 | printf("ata: Identified %s [%s]\n", model, fw); |
| 214 | |
Stefan Reinauer | 1b4d394 | 2015-06-29 15:47:34 -0700 | [diff] [blame] | 215 | #if IS_ENABLED(CONFIG_LP_STORAGE_64BIT_LBA) |
Nico Huber | 1f6bd94 | 2012-08-30 15:36:57 +0200 | [diff] [blame] | 216 | if (id[ATA_CMDS_AND_FEATURE_SETS + 1] & (1 << 10)) { |
| 217 | printf("ata: Support for LBA-48 enabled.\n"); |
| 218 | dev->read_cmd = ATA_READ_DMA_EXT; |
| 219 | } else { |
| 220 | dev->read_cmd = ATA_READ_DMA; |
| 221 | } |
| 222 | #else |
| 223 | dev->read_cmd = ATA_READ_DMA; |
| 224 | #endif |
| 225 | |
| 226 | if (ata_decode_sector_size(dev, id)) |
| 227 | return -1; |
| 228 | |
| 229 | dev->storage_dev.port_type = port_type; |
| 230 | ata_initialize_storage_ops(dev); |
| 231 | |
| 232 | return storage_attach_device(&dev->storage_dev); |
| 233 | } |