developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (C) 2020 MediaTek Inc. All Rights Reserved. |
| 4 | * |
| 5 | * Author: Weijie Gao <weijie.gao@mediatek.com> |
| 6 | */ |
| 7 | |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/mutex.h> |
| 13 | #include <linux/clk.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/dma-mapping.h> |
| 17 | #include <linux/wait.h> |
| 18 | #include <linux/mtd/mtd.h> |
| 19 | #include <linux/mtd/partitions.h> |
| 20 | #include <linux/of_platform.h> |
| 21 | |
| 22 | #include "mtk-snand.h" |
| 23 | #include "mtk-snand-os.h" |
| 24 | |
| 25 | struct mtk_snand_of_id { |
| 26 | enum mtk_snand_soc soc; |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 27 | bool en_ecc_clk; |
| 28 | bool en_nfi_hclk; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 29 | }; |
| 30 | |
| 31 | struct mtk_snand_mtd { |
| 32 | struct mtk_snand_plat_dev pdev; |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 33 | struct mtk_snand_of_id *soc_id; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 34 | |
| 35 | struct clk *nfi_clk; |
| 36 | struct clk *pad_clk; |
| 37 | struct clk *ecc_clk; |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 38 | struct clk *nfi_hclk; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 39 | |
| 40 | void __iomem *nfi_regs; |
| 41 | void __iomem *ecc_regs; |
| 42 | |
| 43 | int irq; |
| 44 | |
| 45 | bool quad_spi; |
| 46 | enum mtk_snand_soc soc; |
| 47 | |
| 48 | struct mtd_info mtd; |
| 49 | struct mtk_snand *snf; |
| 50 | struct mtk_snand_chip_info cinfo; |
| 51 | uint8_t *page_cache; |
| 52 | struct mutex lock; |
| 53 | }; |
| 54 | |
| 55 | #define mtd_to_msm(mtd) container_of(mtd, struct mtk_snand_mtd, mtd) |
| 56 | |
| 57 | static int mtk_snand_mtd_erase(struct mtd_info *mtd, struct erase_info *instr) |
| 58 | { |
| 59 | struct mtk_snand_mtd *msm = mtd_to_msm(mtd); |
| 60 | u64 start_addr, end_addr; |
| 61 | int ret; |
| 62 | |
| 63 | /* Do not allow write past end of device */ |
| 64 | if ((instr->addr + instr->len) > mtd->size) { |
| 65 | dev_err(msm->pdev.dev, |
| 66 | "attempt to erase beyond end of device\n"); |
| 67 | return -EINVAL; |
| 68 | } |
| 69 | |
| 70 | start_addr = instr->addr & (~mtd->erasesize_mask); |
| 71 | end_addr = instr->addr + instr->len; |
| 72 | if (end_addr & mtd->erasesize_mask) { |
| 73 | end_addr = (end_addr + mtd->erasesize_mask) & |
| 74 | (~mtd->erasesize_mask); |
| 75 | } |
| 76 | |
| 77 | mutex_lock(&msm->lock); |
| 78 | |
| 79 | while (start_addr < end_addr) { |
| 80 | if (mtk_snand_block_isbad(msm->snf, start_addr)) { |
| 81 | instr->fail_addr = start_addr; |
| 82 | ret = -EIO; |
| 83 | break; |
| 84 | } |
| 85 | |
| 86 | ret = mtk_snand_erase_block(msm->snf, start_addr); |
| 87 | if (ret) { |
| 88 | instr->fail_addr = start_addr; |
| 89 | break; |
| 90 | } |
| 91 | |
| 92 | start_addr += mtd->erasesize; |
| 93 | } |
| 94 | |
| 95 | mutex_unlock(&msm->lock); |
| 96 | |
| 97 | return ret; |
| 98 | } |
| 99 | |
| 100 | static int mtk_snand_mtd_read_data(struct mtk_snand_mtd *msm, uint64_t addr, |
| 101 | struct mtd_oob_ops *ops) |
| 102 | { |
| 103 | struct mtd_info *mtd = &msm->mtd; |
| 104 | size_t len, ooblen, maxooblen, chklen; |
| 105 | uint32_t col, ooboffs; |
| 106 | uint8_t *datcache, *oobcache; |
developer | 02fcbaa | 2021-05-11 11:18:11 +0800 | [diff] [blame] | 107 | bool ecc_failed = false, raw = ops->mode == MTD_OPS_RAW ? true : false; |
| 108 | int ret, max_bitflips = 0; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 109 | |
| 110 | col = addr & mtd->writesize_mask; |
| 111 | addr &= ~mtd->writesize_mask; |
| 112 | maxooblen = mtd_oobavail(mtd, ops); |
| 113 | ooboffs = ops->ooboffs; |
| 114 | ooblen = ops->ooblen; |
| 115 | len = ops->len; |
| 116 | |
| 117 | datcache = len ? msm->page_cache : NULL; |
| 118 | oobcache = ooblen ? msm->page_cache + mtd->writesize : NULL; |
| 119 | |
| 120 | ops->oobretlen = 0; |
| 121 | ops->retlen = 0; |
| 122 | |
| 123 | while (len || ooblen) { |
| 124 | if (ops->mode == MTD_OPS_AUTO_OOB) |
| 125 | ret = mtk_snand_read_page_auto_oob(msm->snf, addr, |
| 126 | datcache, oobcache, maxooblen, NULL, raw); |
| 127 | else |
| 128 | ret = mtk_snand_read_page(msm->snf, addr, datcache, |
| 129 | oobcache, raw); |
| 130 | |
developer | 02fcbaa | 2021-05-11 11:18:11 +0800 | [diff] [blame] | 131 | if (ret < 0 && ret != -EBADMSG) |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 132 | return ret; |
| 133 | |
developer | 02fcbaa | 2021-05-11 11:18:11 +0800 | [diff] [blame] | 134 | if (ret == -EBADMSG) { |
| 135 | mtd->ecc_stats.failed++; |
| 136 | ecc_failed = true; |
| 137 | } else { |
| 138 | mtd->ecc_stats.corrected += ret; |
| 139 | max_bitflips = max_t(int, ret, max_bitflips); |
| 140 | } |
| 141 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 142 | if (len) { |
| 143 | /* Move data */ |
| 144 | chklen = mtd->writesize - col; |
| 145 | if (chklen > len) |
| 146 | chklen = len; |
| 147 | |
| 148 | memcpy(ops->datbuf + ops->retlen, datcache + col, |
| 149 | chklen); |
| 150 | len -= chklen; |
| 151 | col = 0; /* (col + chklen) % */ |
| 152 | ops->retlen += chklen; |
| 153 | } |
| 154 | |
| 155 | if (ooblen) { |
| 156 | /* Move oob */ |
| 157 | chklen = maxooblen - ooboffs; |
| 158 | if (chklen > ooblen) |
| 159 | chklen = ooblen; |
| 160 | |
| 161 | memcpy(ops->oobbuf + ops->oobretlen, oobcache + ooboffs, |
| 162 | chklen); |
| 163 | ooblen -= chklen; |
| 164 | ooboffs = 0; /* (ooboffs + chklen) % maxooblen; */ |
| 165 | ops->oobretlen += chklen; |
| 166 | } |
| 167 | |
| 168 | addr += mtd->writesize; |
| 169 | } |
| 170 | |
developer | 02fcbaa | 2021-05-11 11:18:11 +0800 | [diff] [blame] | 171 | return ecc_failed ? -EBADMSG : max_bitflips; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | static int mtk_snand_mtd_read_oob(struct mtd_info *mtd, loff_t from, |
| 175 | struct mtd_oob_ops *ops) |
| 176 | { |
| 177 | struct mtk_snand_mtd *msm = mtd_to_msm(mtd); |
| 178 | uint32_t maxooblen; |
| 179 | int ret; |
| 180 | |
| 181 | if (!ops->oobbuf && !ops->datbuf) { |
| 182 | if (ops->ooblen || ops->len) |
| 183 | return -EINVAL; |
| 184 | |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | switch (ops->mode) { |
| 189 | case MTD_OPS_PLACE_OOB: |
| 190 | case MTD_OPS_AUTO_OOB: |
| 191 | case MTD_OPS_RAW: |
| 192 | break; |
| 193 | default: |
| 194 | dev_err(msm->pdev.dev, "unsupported oob mode: %u\n", ops->mode); |
| 195 | return -EINVAL; |
| 196 | } |
| 197 | |
| 198 | maxooblen = mtd_oobavail(mtd, ops); |
| 199 | |
| 200 | /* Do not allow read past end of device */ |
| 201 | if (ops->datbuf && (from + ops->len) > mtd->size) { |
| 202 | dev_err(msm->pdev.dev, |
| 203 | "attempt to read beyond end of device\n"); |
| 204 | return -EINVAL; |
| 205 | } |
| 206 | |
| 207 | if (unlikely(ops->ooboffs >= maxooblen)) { |
| 208 | dev_err(msm->pdev.dev, "attempt to start read outside oob\n"); |
| 209 | return -EINVAL; |
| 210 | } |
| 211 | |
| 212 | if (unlikely(from >= mtd->size || |
| 213 | ops->ooboffs + ops->ooblen > ((mtd->size >> mtd->writesize_shift) - |
| 214 | (from >> mtd->writesize_shift)) * maxooblen)) { |
| 215 | dev_err(msm->pdev.dev, |
| 216 | "attempt to read beyond end of device\n"); |
| 217 | return -EINVAL; |
| 218 | } |
| 219 | |
| 220 | mutex_lock(&msm->lock); |
| 221 | ret = mtk_snand_mtd_read_data(msm, from, ops); |
| 222 | mutex_unlock(&msm->lock); |
| 223 | |
| 224 | return ret; |
| 225 | } |
| 226 | |
| 227 | static int mtk_snand_mtd_write_data(struct mtk_snand_mtd *msm, uint64_t addr, |
| 228 | struct mtd_oob_ops *ops) |
| 229 | { |
| 230 | struct mtd_info *mtd = &msm->mtd; |
| 231 | size_t len, ooblen, maxooblen, chklen, oobwrlen; |
| 232 | uint32_t col, ooboffs; |
| 233 | uint8_t *datcache, *oobcache; |
| 234 | bool raw = ops->mode == MTD_OPS_RAW ? true : false; |
| 235 | int ret; |
| 236 | |
| 237 | col = addr & mtd->writesize_mask; |
| 238 | addr &= ~mtd->writesize_mask; |
| 239 | maxooblen = mtd_oobavail(mtd, ops); |
| 240 | ooboffs = ops->ooboffs; |
| 241 | ooblen = ops->ooblen; |
| 242 | len = ops->len; |
| 243 | |
| 244 | datcache = len ? msm->page_cache : NULL; |
| 245 | oobcache = ooblen ? msm->page_cache + mtd->writesize : NULL; |
| 246 | |
| 247 | ops->oobretlen = 0; |
| 248 | ops->retlen = 0; |
| 249 | |
| 250 | while (len || ooblen) { |
| 251 | if (len) { |
| 252 | /* Move data */ |
| 253 | chklen = mtd->writesize - col; |
| 254 | if (chklen > len) |
| 255 | chklen = len; |
| 256 | |
| 257 | memset(datcache, 0xff, col); |
| 258 | memcpy(datcache + col, ops->datbuf + ops->retlen, |
| 259 | chklen); |
| 260 | memset(datcache + col + chklen, 0xff, |
| 261 | mtd->writesize - col - chklen); |
| 262 | len -= chklen; |
| 263 | col = 0; /* (col + chklen) % */ |
| 264 | ops->retlen += chklen; |
| 265 | } |
| 266 | |
| 267 | oobwrlen = 0; |
| 268 | if (ooblen) { |
| 269 | /* Move oob */ |
| 270 | chklen = maxooblen - ooboffs; |
| 271 | if (chklen > ooblen) |
| 272 | chklen = ooblen; |
| 273 | |
| 274 | memset(oobcache, 0xff, ooboffs); |
| 275 | memcpy(oobcache + ooboffs, |
| 276 | ops->oobbuf + ops->oobretlen, chklen); |
| 277 | memset(oobcache + ooboffs + chklen, 0xff, |
| 278 | mtd->oobsize - ooboffs - chklen); |
| 279 | oobwrlen = chklen + ooboffs; |
| 280 | ooblen -= chklen; |
| 281 | ooboffs = 0; /* (ooboffs + chklen) % maxooblen; */ |
| 282 | ops->oobretlen += chklen; |
| 283 | } |
| 284 | |
| 285 | if (ops->mode == MTD_OPS_AUTO_OOB) |
| 286 | ret = mtk_snand_write_page_auto_oob(msm->snf, addr, |
| 287 | datcache, oobcache, oobwrlen, NULL, raw); |
| 288 | else |
| 289 | ret = mtk_snand_write_page(msm->snf, addr, datcache, |
| 290 | oobcache, raw); |
| 291 | |
| 292 | if (ret) |
| 293 | return ret; |
| 294 | |
| 295 | addr += mtd->writesize; |
| 296 | } |
| 297 | |
| 298 | return 0; |
| 299 | } |
| 300 | |
| 301 | static int mtk_snand_mtd_write_oob(struct mtd_info *mtd, loff_t to, |
| 302 | struct mtd_oob_ops *ops) |
| 303 | { |
| 304 | struct mtk_snand_mtd *msm = mtd_to_msm(mtd); |
| 305 | uint32_t maxooblen; |
| 306 | int ret; |
| 307 | |
| 308 | if (!ops->oobbuf && !ops->datbuf) { |
| 309 | if (ops->ooblen || ops->len) |
| 310 | return -EINVAL; |
| 311 | |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | switch (ops->mode) { |
| 316 | case MTD_OPS_PLACE_OOB: |
| 317 | case MTD_OPS_AUTO_OOB: |
| 318 | case MTD_OPS_RAW: |
| 319 | break; |
| 320 | default: |
| 321 | dev_err(msm->pdev.dev, "unsupported oob mode: %u\n", ops->mode); |
| 322 | return -EINVAL; |
| 323 | } |
| 324 | |
| 325 | maxooblen = mtd_oobavail(mtd, ops); |
| 326 | |
| 327 | /* Do not allow write past end of device */ |
| 328 | if (ops->datbuf && (to + ops->len) > mtd->size) { |
| 329 | dev_err(msm->pdev.dev, |
| 330 | "attempt to write beyond end of device\n"); |
| 331 | return -EINVAL; |
| 332 | } |
| 333 | |
| 334 | if (unlikely(ops->ooboffs >= maxooblen)) { |
| 335 | dev_err(msm->pdev.dev, |
| 336 | "attempt to start write outside oob\n"); |
| 337 | return -EINVAL; |
| 338 | } |
| 339 | |
| 340 | if (unlikely(to >= mtd->size || |
| 341 | ops->ooboffs + ops->ooblen > ((mtd->size >> mtd->writesize_shift) - |
| 342 | (to >> mtd->writesize_shift)) * maxooblen)) { |
| 343 | dev_err(msm->pdev.dev, |
| 344 | "attempt to write beyond end of device\n"); |
| 345 | return -EINVAL; |
| 346 | } |
| 347 | |
| 348 | mutex_lock(&msm->lock); |
| 349 | ret = mtk_snand_mtd_write_data(msm, to, ops); |
| 350 | mutex_unlock(&msm->lock); |
| 351 | |
| 352 | return ret; |
| 353 | } |
| 354 | |
| 355 | static int mtk_snand_mtd_block_isbad(struct mtd_info *mtd, loff_t offs) |
| 356 | { |
| 357 | struct mtk_snand_mtd *msm = mtd_to_msm(mtd); |
| 358 | int ret; |
| 359 | |
| 360 | mutex_lock(&msm->lock); |
| 361 | ret = mtk_snand_block_isbad(msm->snf, offs); |
| 362 | mutex_unlock(&msm->lock); |
| 363 | |
| 364 | return ret; |
| 365 | } |
| 366 | |
| 367 | static int mtk_snand_mtd_block_markbad(struct mtd_info *mtd, loff_t offs) |
| 368 | { |
| 369 | struct mtk_snand_mtd *msm = mtd_to_msm(mtd); |
| 370 | int ret; |
| 371 | |
| 372 | mutex_lock(&msm->lock); |
| 373 | ret = mtk_snand_block_markbad(msm->snf, offs); |
| 374 | mutex_unlock(&msm->lock); |
| 375 | |
| 376 | return ret; |
| 377 | } |
| 378 | |
| 379 | static int mtk_snand_ooblayout_ecc(struct mtd_info *mtd, int section, |
| 380 | struct mtd_oob_region *oobecc) |
| 381 | { |
| 382 | struct mtk_snand_mtd *msm = mtd_to_msm(mtd); |
| 383 | |
| 384 | if (section) |
| 385 | return -ERANGE; |
| 386 | |
| 387 | oobecc->offset = msm->cinfo.fdm_size * msm->cinfo.num_sectors; |
| 388 | oobecc->length = mtd->oobsize - oobecc->offset; |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static int mtk_snand_ooblayout_free(struct mtd_info *mtd, int section, |
| 394 | struct mtd_oob_region *oobfree) |
| 395 | { |
| 396 | struct mtk_snand_mtd *msm = mtd_to_msm(mtd); |
| 397 | |
| 398 | if (section >= msm->cinfo.num_sectors) |
| 399 | return -ERANGE; |
| 400 | |
| 401 | oobfree->length = msm->cinfo.fdm_size - 1; |
| 402 | oobfree->offset = section * msm->cinfo.fdm_size + 1; |
| 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | static irqreturn_t mtk_snand_irq(int irq, void *id) |
| 408 | { |
| 409 | struct mtk_snand_mtd *msm = id; |
| 410 | int ret; |
| 411 | |
| 412 | ret = mtk_snand_irq_process(msm->snf); |
| 413 | if (ret > 0) |
| 414 | return IRQ_HANDLED; |
| 415 | |
| 416 | return IRQ_NONE; |
| 417 | } |
| 418 | |
| 419 | static int mtk_snand_enable_clk(struct mtk_snand_mtd *msm) |
| 420 | { |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 421 | struct mtk_snand_of_id *soc_id = msm->soc_id; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 422 | int ret; |
| 423 | |
| 424 | ret = clk_prepare_enable(msm->nfi_clk); |
| 425 | if (ret) { |
| 426 | dev_err(msm->pdev.dev, "unable to enable nfi clk\n"); |
| 427 | return ret; |
| 428 | } |
| 429 | |
| 430 | ret = clk_prepare_enable(msm->pad_clk); |
| 431 | if (ret) { |
| 432 | dev_err(msm->pdev.dev, "unable to enable pad clk\n"); |
| 433 | clk_disable_unprepare(msm->nfi_clk); |
| 434 | return ret; |
| 435 | } |
| 436 | |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 437 | if (soc_id->en_ecc_clk) { |
| 438 | ret = clk_prepare_enable(msm->ecc_clk); |
| 439 | if (ret) { |
| 440 | dev_err(msm->pdev.dev, "unable to enable ecc clk\n"); |
| 441 | clk_disable_unprepare(msm->nfi_clk); |
| 442 | clk_disable_unprepare(msm->pad_clk); |
| 443 | return ret; |
| 444 | } |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 445 | } |
| 446 | |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 447 | if (soc_id->en_nfi_hclk) { |
| 448 | ret = clk_prepare_enable(msm->nfi_hclk); |
| 449 | if (ret) { |
| 450 | dev_err(msm->pdev.dev, "unable to enable nfi hclk\n"); |
| 451 | clk_disable_unprepare(msm->nfi_clk); |
| 452 | clk_disable_unprepare(msm->pad_clk); |
| 453 | if (soc_id->en_ecc_clk) |
| 454 | clk_disable_unprepare(msm->ecc_clk); |
| 455 | return ret; |
| 456 | } |
| 457 | } |
| 458 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | static void mtk_snand_disable_clk(struct mtk_snand_mtd *msm) |
| 463 | { |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 464 | struct mtk_snand_of_id *soc_id = msm->soc_id; |
| 465 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 466 | clk_disable_unprepare(msm->nfi_clk); |
| 467 | clk_disable_unprepare(msm->pad_clk); |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 468 | if (soc_id->en_ecc_clk) |
| 469 | clk_disable_unprepare(msm->ecc_clk); |
| 470 | if (soc_id->en_nfi_hclk) |
| 471 | clk_disable_unprepare(msm->nfi_hclk); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | static const struct mtd_ooblayout_ops mtk_snand_ooblayout = { |
| 475 | .ecc = mtk_snand_ooblayout_ecc, |
| 476 | .free = mtk_snand_ooblayout_free, |
| 477 | }; |
| 478 | |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 479 | static struct mtk_snand_of_id mt7622_soc_id = { |
| 480 | .soc = SNAND_SOC_MT7622, |
| 481 | .en_ecc_clk = true, |
| 482 | .en_nfi_hclk = false |
| 483 | }; |
| 484 | |
| 485 | static struct mtk_snand_of_id mt7629_soc_id = { |
| 486 | .soc = SNAND_SOC_MT7629, |
| 487 | .en_ecc_clk = true, |
| 488 | .en_nfi_hclk = false |
| 489 | }; |
| 490 | |
| 491 | static struct mtk_snand_of_id mt7986_soc_id = { |
| 492 | .soc = SNAND_SOC_MT7986, |
| 493 | .en_ecc_clk = false, |
| 494 | .en_nfi_hclk = true |
| 495 | }; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 496 | |
developer | dfd2362 | 2022-11-25 19:02:20 +0800 | [diff] [blame] | 497 | static struct mtk_snand_of_id mt7988_soc_id = { |
| 498 | .soc = SNAND_SOC_MT7988, |
| 499 | .en_ecc_clk = false, |
| 500 | .en_nfi_hclk = false |
| 501 | }; |
| 502 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 503 | static const struct of_device_id mtk_snand_ids[] = { |
| 504 | { .compatible = "mediatek,mt7622-snand", .data = &mt7622_soc_id }, |
| 505 | { .compatible = "mediatek,mt7629-snand", .data = &mt7629_soc_id }, |
| 506 | { .compatible = "mediatek,mt7986-snand", .data = &mt7986_soc_id }, |
developer | dfd2362 | 2022-11-25 19:02:20 +0800 | [diff] [blame] | 507 | { .compatible = "mediatek,mt7988-snand", .data = &mt7988_soc_id }, |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 508 | { }, |
| 509 | }; |
| 510 | |
| 511 | MODULE_DEVICE_TABLE(of, mtk_snand_ids); |
| 512 | |
| 513 | static int mtk_snand_probe(struct platform_device *pdev) |
| 514 | { |
| 515 | struct mtk_snand_platdata mtk_snand_pdata = {}; |
| 516 | struct device_node *np = pdev->dev.of_node; |
| 517 | const struct of_device_id *of_soc_id; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 518 | struct mtk_snand_mtd *msm; |
| 519 | struct mtd_info *mtd; |
| 520 | struct resource *r; |
| 521 | uint32_t size; |
| 522 | int ret; |
| 523 | |
| 524 | of_soc_id = of_match_node(mtk_snand_ids, np); |
| 525 | if (!of_soc_id) |
| 526 | return -EINVAL; |
| 527 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 528 | msm = devm_kzalloc(&pdev->dev, sizeof(*msm), GFP_KERNEL); |
| 529 | if (!msm) |
| 530 | return -ENOMEM; |
| 531 | |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 532 | msm->soc_id = of_soc_id->data; |
| 533 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 534 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nfi"); |
| 535 | msm->nfi_regs = devm_ioremap_resource(&pdev->dev, r); |
| 536 | if (IS_ERR(msm->nfi_regs)) { |
| 537 | ret = PTR_ERR(msm->nfi_regs); |
| 538 | goto errout1; |
| 539 | } |
| 540 | |
| 541 | r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ecc"); |
| 542 | msm->ecc_regs = devm_ioremap_resource(&pdev->dev, r); |
| 543 | if (IS_ERR(msm->ecc_regs)) { |
| 544 | ret = PTR_ERR(msm->ecc_regs); |
| 545 | goto errout1; |
| 546 | } |
| 547 | |
| 548 | msm->pdev.dev = &pdev->dev; |
| 549 | msm->quad_spi = of_property_read_bool(np, "mediatek,quad-spi"); |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 550 | msm->soc = msm->soc_id->soc; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 551 | |
| 552 | msm->nfi_clk = devm_clk_get(msm->pdev.dev, "nfi_clk"); |
| 553 | if (IS_ERR(msm->nfi_clk)) { |
| 554 | ret = PTR_ERR(msm->nfi_clk); |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 555 | dev_err(msm->pdev.dev, |
| 556 | "unable to get nfi_clk, err = %d\n", ret); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 557 | goto errout1; |
| 558 | } |
| 559 | |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 560 | if (msm->soc_id->en_ecc_clk) { |
| 561 | msm->ecc_clk = devm_clk_get(msm->pdev.dev, "ecc_clk"); |
| 562 | if (IS_ERR(msm->ecc_clk)) { |
| 563 | ret = PTR_ERR(msm->ecc_clk); |
| 564 | dev_err(msm->pdev.dev, |
| 565 | "unable to get ecc_clk, err = %d\n", ret); |
| 566 | goto errout1; |
| 567 | } |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 568 | } |
| 569 | |
| 570 | msm->pad_clk = devm_clk_get(msm->pdev.dev, "pad_clk"); |
| 571 | if (IS_ERR(msm->pad_clk)) { |
| 572 | ret = PTR_ERR(msm->pad_clk); |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 573 | dev_err(msm->pdev.dev, |
| 574 | "unable to get pad_clk, err = %d\n", ret); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 575 | goto errout1; |
| 576 | } |
| 577 | |
developer | 4a75295 | 2021-07-14 15:59:06 +0800 | [diff] [blame] | 578 | if (msm->soc_id->en_nfi_hclk) { |
| 579 | msm->nfi_hclk = devm_clk_get(msm->pdev.dev, "nfi_hclk"); |
| 580 | if (IS_ERR(msm->nfi_hclk)) { |
| 581 | ret = PTR_ERR(msm->nfi_hclk); |
| 582 | dev_err(msm->pdev.dev, |
| 583 | "unable to get nfi_hclk, err = %d\n", ret); |
| 584 | goto errout1; |
| 585 | } |
| 586 | } |
| 587 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 588 | ret = mtk_snand_enable_clk(msm); |
| 589 | if (ret) |
| 590 | goto errout1; |
| 591 | |
| 592 | /* Probe SPI-NAND Flash */ |
| 593 | mtk_snand_pdata.soc = msm->soc; |
| 594 | mtk_snand_pdata.quad_spi = msm->quad_spi; |
| 595 | mtk_snand_pdata.nfi_base = msm->nfi_regs; |
| 596 | mtk_snand_pdata.ecc_base = msm->ecc_regs; |
| 597 | |
| 598 | ret = mtk_snand_init(&msm->pdev, &mtk_snand_pdata, &msm->snf); |
| 599 | if (ret) |
| 600 | goto errout1; |
| 601 | |
| 602 | msm->irq = platform_get_irq(pdev, 0); |
| 603 | if (msm->irq >= 0) { |
| 604 | ret = devm_request_irq(msm->pdev.dev, msm->irq, mtk_snand_irq, |
| 605 | 0x0, "mtk-snand", msm); |
| 606 | if (ret) { |
| 607 | dev_err(msm->pdev.dev, "failed to request snfi irq\n"); |
| 608 | goto errout2; |
| 609 | } |
| 610 | |
| 611 | ret = dma_set_mask(msm->pdev.dev, DMA_BIT_MASK(32)); |
| 612 | if (ret) { |
| 613 | dev_err(msm->pdev.dev, "failed to set dma mask\n"); |
| 614 | goto errout3; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | mtk_snand_get_chip_info(msm->snf, &msm->cinfo); |
| 619 | |
| 620 | size = msm->cinfo.pagesize + msm->cinfo.sparesize; |
| 621 | msm->page_cache = devm_kmalloc(msm->pdev.dev, size, GFP_KERNEL); |
| 622 | if (!msm->page_cache) { |
| 623 | dev_err(msm->pdev.dev, "failed to allocate page cache\n"); |
| 624 | ret = -ENOMEM; |
| 625 | goto errout3; |
| 626 | } |
| 627 | |
| 628 | mutex_init(&msm->lock); |
| 629 | |
| 630 | dev_info(msm->pdev.dev, |
| 631 | "chip is %s, size %lluMB, page size %u, oob size %u\n", |
| 632 | msm->cinfo.model, msm->cinfo.chipsize >> 20, |
| 633 | msm->cinfo.pagesize, msm->cinfo.sparesize); |
| 634 | |
| 635 | /* Initialize mtd for SPI-NAND */ |
| 636 | mtd = &msm->mtd; |
| 637 | |
| 638 | mtd->owner = THIS_MODULE; |
| 639 | mtd->dev.parent = &pdev->dev; |
| 640 | mtd->type = MTD_NANDFLASH; |
| 641 | mtd->flags = MTD_CAP_NANDFLASH; |
| 642 | |
| 643 | mtd_set_of_node(mtd, np); |
| 644 | |
| 645 | mtd->size = msm->cinfo.chipsize; |
| 646 | mtd->erasesize = msm->cinfo.blocksize; |
| 647 | mtd->writesize = msm->cinfo.pagesize; |
| 648 | mtd->writebufsize = mtd->writesize; |
| 649 | mtd->oobsize = msm->cinfo.sparesize; |
| 650 | mtd->oobavail = msm->cinfo.num_sectors * (msm->cinfo.fdm_size - 1); |
| 651 | |
| 652 | mtd->erasesize_shift = ffs(mtd->erasesize) - 1; |
| 653 | mtd->writesize_shift = ffs(mtd->writesize) - 1; |
| 654 | mtd->erasesize_mask = (1 << mtd->erasesize_shift) - 1; |
| 655 | mtd->writesize_mask = (1 << mtd->writesize_shift) - 1; |
| 656 | |
| 657 | mtd->ooblayout = &mtk_snand_ooblayout; |
| 658 | |
developer | 4da1bed | 2021-05-08 17:30:37 +0800 | [diff] [blame] | 659 | mtd->ecc_strength = msm->cinfo.ecc_strength; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 660 | mtd->bitflip_threshold = (mtd->ecc_strength * 3) / 4; |
| 661 | mtd->ecc_step_size = msm->cinfo.sector_size; |
| 662 | |
| 663 | mtd->_erase = mtk_snand_mtd_erase; |
| 664 | mtd->_read_oob = mtk_snand_mtd_read_oob; |
| 665 | mtd->_write_oob = mtk_snand_mtd_write_oob; |
| 666 | mtd->_block_isbad = mtk_snand_mtd_block_isbad; |
| 667 | mtd->_block_markbad = mtk_snand_mtd_block_markbad; |
| 668 | |
| 669 | ret = mtd_device_register(mtd, NULL, 0); |
| 670 | if (ret) { |
| 671 | dev_err(msm->pdev.dev, "failed to register mtd partition\n"); |
| 672 | goto errout4; |
| 673 | } |
| 674 | |
| 675 | platform_set_drvdata(pdev, msm); |
| 676 | |
| 677 | return 0; |
| 678 | |
| 679 | errout4: |
| 680 | devm_kfree(msm->pdev.dev, msm->page_cache); |
| 681 | |
| 682 | errout3: |
| 683 | if (msm->irq >= 0) |
| 684 | devm_free_irq(msm->pdev.dev, msm->irq, msm); |
| 685 | |
| 686 | errout2: |
| 687 | mtk_snand_cleanup(msm->snf); |
| 688 | |
| 689 | errout1: |
| 690 | devm_kfree(msm->pdev.dev, msm); |
| 691 | |
| 692 | platform_set_drvdata(pdev, NULL); |
| 693 | |
| 694 | return ret; |
| 695 | } |
| 696 | |
| 697 | static int mtk_snand_remove(struct platform_device *pdev) |
| 698 | { |
| 699 | struct mtk_snand_mtd *msm = platform_get_drvdata(pdev); |
| 700 | struct mtd_info *mtd = &msm->mtd; |
| 701 | int ret; |
| 702 | |
| 703 | ret = mtd_device_unregister(mtd); |
| 704 | if (ret) |
| 705 | return ret; |
| 706 | |
| 707 | mtk_snand_cleanup(msm->snf); |
| 708 | |
| 709 | if (msm->irq >= 0) |
| 710 | devm_free_irq(msm->pdev.dev, msm->irq, msm); |
| 711 | |
| 712 | mtk_snand_disable_clk(msm); |
| 713 | |
| 714 | devm_kfree(msm->pdev.dev, msm->page_cache); |
| 715 | devm_kfree(msm->pdev.dev, msm); |
| 716 | |
| 717 | platform_set_drvdata(pdev, NULL); |
| 718 | |
| 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | static struct platform_driver mtk_snand_driver = { |
| 723 | .probe = mtk_snand_probe, |
| 724 | .remove = mtk_snand_remove, |
| 725 | .driver = { |
| 726 | .name = "mtk-snand", |
| 727 | .of_match_table = mtk_snand_ids, |
| 728 | }, |
| 729 | }; |
| 730 | |
| 731 | module_platform_driver(mtk_snand_driver); |
| 732 | |
| 733 | MODULE_LICENSE("GPL"); |
| 734 | MODULE_AUTHOR("Weijie Gao <weijie.gao@mediatek.com>"); |
| 735 | MODULE_DESCRIPTION("MeidaTek SPI-NAND Flash Controller Driver"); |