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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2025, SaluteDevices. All Rights Reserved. * * Author: Martin Kurbanov <mmkurbanov@salutedevices.com> */ #include <linux/mtd/mtd.h> #include <linux/mtd/spinand.h> #ifdef __UBOOT__ #include <spi.h> #include <dm/device_compat.h> #endif /** * spinand_otp_page_size() - Get SPI-NAND OTP page size * @spinand: the spinand device * * Return: the OTP page size. */ size_t spinand_otp_page_size(struct spinand_device *spinand) { struct nand_device *nand = spinand_to_nand(spinand); return nanddev_page_size(nand) + nanddev_per_page_oobsize(nand); } static size_t spinand_otp_size(struct spinand_device *spinand, const struct spinand_otp_layout *layout) { return layout->npages * spinand_otp_page_size(spinand); } /** * spinand_fact_otp_size() - Get SPI-NAND factory OTP area size * @spinand: the spinand device * * Return: the OTP size. */ size_t spinand_fact_otp_size(struct spinand_device *spinand) { return spinand_otp_size(spinand, &spinand->fact_otp->layout); } /** * spinand_user_otp_size() - Get SPI-NAND user OTP area size * @spinand: the spinand device * * Return: the OTP size. */ size_t spinand_user_otp_size(struct spinand_device *spinand) { return spinand_otp_size(spinand, &spinand->user_otp->layout); } static int spinand_otp_check_bounds(struct spinand_device *spinand, loff_t ofs, size_t len, const struct spinand_otp_layout *layout) { if (ofs < 0 || ofs + len > spinand_otp_size(spinand, layout)) return -EINVAL; return 0; } static int spinand_user_otp_check_bounds(struct spinand_device *spinand, loff_t ofs, size_t len) { return spinand_otp_check_bounds(spinand, ofs, len, &spinand->user_otp->layout); } static int spinand_otp_rw(struct spinand_device *spinand, loff_t ofs, size_t len, size_t *retlen, u8 *buf, bool is_write, const struct spinand_otp_layout *layout) { struct nand_page_io_req req = {}; unsigned long long page; size_t copied = 0; size_t otp_pagesize = spinand_otp_page_size(spinand); int ret; if (!len) return 0; ret = spinand_otp_check_bounds(spinand, ofs, len, layout); if (ret) return ret; ret = spinand_upd_cfg(spinand, CFG_OTP_ENABLE, CFG_OTP_ENABLE); if (ret) return ret; page = ofs; req.dataoffs = do_div(page, otp_pagesize); req.pos.page = page + layout->start_page; req.type = is_write ? NAND_PAGE_WRITE : NAND_PAGE_READ; req.mode = MTD_OPS_RAW; req.databuf.in = buf; while (copied < len) { req.datalen = min_t(unsigned int, otp_pagesize - req.dataoffs, len - copied); if (is_write) ret = spinand_write_page(spinand, &req); else ret = spinand_read_page(spinand, &req); if (ret < 0) break; req.databuf.in += req.datalen; req.pos.page++; req.dataoffs = 0; copied += req.datalen; } *retlen = copied; if (spinand_upd_cfg(spinand, CFG_OTP_ENABLE, 0)) { dev_warn(spinand->slave->dev, "Can not disable OTP mode\n"); ret = -EIO; } return ret; } /** * spinand_fact_otp_read() - Read from OTP area * @spinand: the spinand device * @ofs: the offset to read * @len: the number of data bytes to read * @retlen: the pointer to variable to store the number of read bytes * @buf: the buffer to store the read data * * Return: 0 on success, an error code otherwise. */ int spinand_fact_otp_read(struct spinand_device *spinand, loff_t ofs, size_t len, size_t *retlen, u8 *buf) { return spinand_otp_rw(spinand, ofs, len, retlen, buf, false, &spinand->fact_otp->layout); } /** * spinand_user_otp_read() - Read from OTP area * @spinand: the spinand device * @ofs: the offset to read * @len: the number of data bytes to read * @retlen: the pointer to variable to store the number of read bytes * @buf: the buffer to store the read data * * Return: 0 on success, an error code otherwise. */ int spinand_user_otp_read(struct spinand_device *spinand, loff_t ofs, size_t len, size_t *retlen, u8 *buf) { return spinand_otp_rw(spinand, ofs, len, retlen, buf, false, &spinand->user_otp->layout); } /** * spinand_user_otp_write() - Write to OTP area * @spinand: the spinand device * @ofs: the offset to write to * @len: the number of bytes to write * @retlen: the pointer to variable to store the number of written bytes * @buf: the buffer with data to write * * Return: 0 on success, an error code otherwise. */ int spinand_user_otp_write(struct spinand_device *spinand, loff_t ofs, size_t len, size_t *retlen, const u8 *buf) { return spinand_otp_rw(spinand, ofs, len, retlen, (u8 *)buf, true, &spinand->user_otp->layout); } static int spinand_mtd_otp_info(struct mtd_info *mtd, size_t len, size_t *retlen, struct otp_info *buf, bool is_fact) { struct spinand_device *spinand = mtd_to_spinand(mtd); int ret; *retlen = 0; mutex_lock(&spinand->lock); if (is_fact) ret = spinand->fact_otp->ops->info(spinand, len, buf, retlen); else ret = spinand->user_otp->ops->info(spinand, len, buf, retlen); mutex_unlock(&spinand->lock); return ret; } static int spinand_mtd_fact_otp_info(struct mtd_info *mtd, size_t len, size_t *retlen, struct otp_info *buf) { return spinand_mtd_otp_info(mtd, len, retlen, buf, true); } static int spinand_mtd_user_otp_info(struct mtd_info *mtd, size_t len, size_t *retlen, struct otp_info *buf) { return spinand_mtd_otp_info(mtd, len, retlen, buf, false); } static int spinand_mtd_otp_read(struct mtd_info *mtd, loff_t ofs, size_t len, size_t *retlen, u8 *buf, bool is_fact) { struct spinand_device *spinand = mtd_to_spinand(mtd); int ret; *retlen = 0; if (!len) return 0; ret = spinand_otp_check_bounds(spinand, ofs, len, is_fact ? &spinand->fact_otp->layout : &spinand->user_otp->layout); if (ret) return ret; mutex_lock(&spinand->lock); if (is_fact) ret = spinand->fact_otp->ops->read(spinand, ofs, len, retlen, buf); else ret = spinand->user_otp->ops->read(spinand, ofs, len, retlen, buf); mutex_unlock(&spinand->lock); return ret; } static int spinand_mtd_fact_otp_read(struct mtd_info *mtd, loff_t ofs, size_t len, size_t *retlen, u8 *buf) { return spinand_mtd_otp_read(mtd, ofs, len, retlen, buf, true); } static int spinand_mtd_user_otp_read(struct mtd_info *mtd, loff_t ofs, size_t len, size_t *retlen, u8 *buf) { return spinand_mtd_otp_read(mtd, ofs, len, retlen, buf, false); } static int spinand_mtd_user_otp_write(struct mtd_info *mtd, loff_t ofs, size_t len, size_t *retlen, u_char *buf) { struct spinand_device *spinand = mtd_to_spinand(mtd); const struct spinand_user_otp_ops *ops = spinand->user_otp->ops; int ret; *retlen = 0; if (!len) return 0; ret = spinand_user_otp_check_bounds(spinand, ofs, len); if (ret) return ret; mutex_lock(&spinand->lock); ret = ops->write(spinand, ofs, len, retlen, buf); mutex_unlock(&spinand->lock); return ret; } #ifndef __UBOOT__ static int spinand_mtd_user_otp_erase(struct mtd_info *mtd, loff_t ofs, size_t len) { struct spinand_device *spinand = mtd_to_spinand(mtd); const struct spinand_user_otp_ops *ops = spinand->user_otp->ops; int ret; if (!len) return 0; ret = spinand_user_otp_check_bounds(spinand, ofs, len); if (ret) return ret; mutex_lock(&spinand->lock); ret = ops->erase(spinand, ofs, len); mutex_unlock(&spinand->lock); return ret; } #endif static int spinand_mtd_user_otp_lock(struct mtd_info *mtd, loff_t ofs, size_t len) { struct spinand_device *spinand = mtd_to_spinand(mtd); const struct spinand_user_otp_ops *ops = spinand->user_otp->ops; int ret; if (!len) return 0; ret = spinand_user_otp_check_bounds(spinand, ofs, len); if (ret) return ret; mutex_lock(&spinand->lock); ret = ops->lock(spinand, ofs, len); mutex_unlock(&spinand->lock); return ret; } /** * spinand_set_mtd_otp_ops() - Setup OTP methods * @spinand: the spinand device * * Setup OTP methods. * * Return: 0 on success, a negative error code otherwise. */ int spinand_set_mtd_otp_ops(struct spinand_device *spinand) { struct mtd_info *mtd = spinand_to_mtd(spinand); const struct spinand_fact_otp_ops *fact_ops = spinand->fact_otp->ops; const struct spinand_user_otp_ops *user_ops = spinand->user_otp->ops; if (!user_ops && !fact_ops) return -EINVAL; if (user_ops) { if (user_ops->info) mtd->_get_user_prot_info = spinand_mtd_user_otp_info; if (user_ops->read) mtd->_read_user_prot_reg = spinand_mtd_user_otp_read; if (user_ops->write) mtd->_write_user_prot_reg = spinand_mtd_user_otp_write; if (user_ops->lock) mtd->_lock_user_prot_reg = spinand_mtd_user_otp_lock; #ifndef __UBOOT__ if (user_ops->erase) mtd->_erase_user_prot_reg = spinand_mtd_user_otp_erase; #endif } if (fact_ops) { if (fact_ops->info) mtd->_get_fact_prot_info = spinand_mtd_fact_otp_info; if (fact_ops->read) mtd->_read_fact_prot_reg = spinand_mtd_fact_otp_read; } return 0; } |