1 /* 2 * Hisilicon NAND Flash controller driver 3 * 4 * Copyright © 2012-2014 HiSilicon Technologies Co., Ltd. 5 * http://www.hisilicon.com 6 * 7 * Author: Zhou Wang <wangzhou.bry@gmail.com> 8 * The initial developer of the original code is Zhiyong Cai 9 * <caizhiyong@huawei.com> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 */ 21 #include <linux/of.h> 22 #include <linux/mtd/mtd.h> 23 #include <linux/sizes.h> 24 #include <linux/clk.h> 25 #include <linux/slab.h> 26 #include <linux/module.h> 27 #include <linux/delay.h> 28 #include <linux/interrupt.h> 29 #include <linux/mtd/rawnand.h> 30 #include <linux/dma-mapping.h> 31 #include <linux/platform_device.h> 32 #include <linux/mtd/partitions.h> 33 34 #define HINFC504_MAX_CHIP (4) 35 #define HINFC504_W_LATCH (5) 36 #define HINFC504_R_LATCH (7) 37 #define HINFC504_RW_LATCH (3) 38 39 #define HINFC504_NFC_TIMEOUT (2 * HZ) 40 #define HINFC504_NFC_PM_TIMEOUT (1 * HZ) 41 #define HINFC504_NFC_DMA_TIMEOUT (5 * HZ) 42 #define HINFC504_CHIP_DELAY (25) 43 44 #define HINFC504_REG_BASE_ADDRESS_LEN (0x100) 45 #define HINFC504_BUFFER_BASE_ADDRESS_LEN (2048 + 128) 46 47 #define HINFC504_ADDR_CYCLE_MASK 0x4 48 49 #define HINFC504_CON 0x00 50 #define HINFC504_CON_OP_MODE_NORMAL BIT(0) 51 #define HINFC504_CON_PAGEISZE_SHIFT (1) 52 #define HINFC504_CON_PAGESIZE_MASK (0x07) 53 #define HINFC504_CON_BUS_WIDTH BIT(4) 54 #define HINFC504_CON_READY_BUSY_SEL BIT(8) 55 #define HINFC504_CON_ECCTYPE_SHIFT (9) 56 #define HINFC504_CON_ECCTYPE_MASK (0x07) 57 58 #define HINFC504_PWIDTH 0x04 59 #define SET_HINFC504_PWIDTH(_w_lcnt, _r_lcnt, _rw_hcnt) \ 60 ((_w_lcnt) | (((_r_lcnt) & 0x0F) << 4) | (((_rw_hcnt) & 0x0F) << 8)) 61 62 #define HINFC504_CMD 0x0C 63 #define HINFC504_ADDRL 0x10 64 #define HINFC504_ADDRH 0x14 65 #define HINFC504_DATA_NUM 0x18 66 67 #define HINFC504_OP 0x1C 68 #define HINFC504_OP_READ_DATA_EN BIT(1) 69 #define HINFC504_OP_WAIT_READY_EN BIT(2) 70 #define HINFC504_OP_CMD2_EN BIT(3) 71 #define HINFC504_OP_WRITE_DATA_EN BIT(4) 72 #define HINFC504_OP_ADDR_EN BIT(5) 73 #define HINFC504_OP_CMD1_EN BIT(6) 74 #define HINFC504_OP_NF_CS_SHIFT (7) 75 #define HINFC504_OP_NF_CS_MASK (3) 76 #define HINFC504_OP_ADDR_CYCLE_SHIFT (9) 77 #define HINFC504_OP_ADDR_CYCLE_MASK (7) 78 79 #define HINFC504_STATUS 0x20 80 #define HINFC504_READY BIT(0) 81 82 #define HINFC504_INTEN 0x24 83 #define HINFC504_INTEN_DMA BIT(9) 84 #define HINFC504_INTEN_UE BIT(6) 85 #define HINFC504_INTEN_CE BIT(5) 86 87 #define HINFC504_INTS 0x28 88 #define HINFC504_INTS_DMA BIT(9) 89 #define HINFC504_INTS_UE BIT(6) 90 #define HINFC504_INTS_CE BIT(5) 91 92 #define HINFC504_INTCLR 0x2C 93 #define HINFC504_INTCLR_DMA BIT(9) 94 #define HINFC504_INTCLR_UE BIT(6) 95 #define HINFC504_INTCLR_CE BIT(5) 96 97 #define HINFC504_ECC_STATUS 0x5C 98 #define HINFC504_ECC_16_BIT_SHIFT 12 99 100 #define HINFC504_DMA_CTRL 0x60 101 #define HINFC504_DMA_CTRL_DMA_START BIT(0) 102 #define HINFC504_DMA_CTRL_WE BIT(1) 103 #define HINFC504_DMA_CTRL_DATA_AREA_EN BIT(2) 104 #define HINFC504_DMA_CTRL_OOB_AREA_EN BIT(3) 105 #define HINFC504_DMA_CTRL_BURST4_EN BIT(4) 106 #define HINFC504_DMA_CTRL_BURST8_EN BIT(5) 107 #define HINFC504_DMA_CTRL_BURST16_EN BIT(6) 108 #define HINFC504_DMA_CTRL_ADDR_NUM_SHIFT (7) 109 #define HINFC504_DMA_CTRL_ADDR_NUM_MASK (1) 110 #define HINFC504_DMA_CTRL_CS_SHIFT (8) 111 #define HINFC504_DMA_CTRL_CS_MASK (0x03) 112 113 #define HINFC504_DMA_ADDR_DATA 0x64 114 #define HINFC504_DMA_ADDR_OOB 0x68 115 116 #define HINFC504_DMA_LEN 0x6C 117 #define HINFC504_DMA_LEN_OOB_SHIFT (16) 118 #define HINFC504_DMA_LEN_OOB_MASK (0xFFF) 119 120 #define HINFC504_DMA_PARA 0x70 121 #define HINFC504_DMA_PARA_DATA_RW_EN BIT(0) 122 #define HINFC504_DMA_PARA_OOB_RW_EN BIT(1) 123 #define HINFC504_DMA_PARA_DATA_EDC_EN BIT(2) 124 #define HINFC504_DMA_PARA_OOB_EDC_EN BIT(3) 125 #define HINFC504_DMA_PARA_DATA_ECC_EN BIT(4) 126 #define HINFC504_DMA_PARA_OOB_ECC_EN BIT(5) 127 128 #define HINFC_VERSION 0x74 129 #define HINFC504_LOG_READ_ADDR 0x7C 130 #define HINFC504_LOG_READ_LEN 0x80 131 132 #define HINFC504_NANDINFO_LEN 0x10 133 134 struct hinfc_host { 135 struct nand_chip chip; 136 struct device *dev; 137 void __iomem *iobase; 138 void __iomem *mmio; 139 struct completion cmd_complete; 140 unsigned int offset; 141 unsigned int command; 142 int chipselect; 143 unsigned int addr_cycle; 144 u32 addr_value[2]; 145 u32 cache_addr_value[2]; 146 char *buffer; 147 dma_addr_t dma_buffer; 148 dma_addr_t dma_oob; 149 int version; 150 unsigned int irq_status; /* interrupt status */ 151 }; 152 153 static inline unsigned int hinfc_read(struct hinfc_host *host, unsigned int reg) 154 { 155 return readl(host->iobase + reg); 156 } 157 158 static inline void hinfc_write(struct hinfc_host *host, unsigned int value, 159 unsigned int reg) 160 { 161 writel(value, host->iobase + reg); 162 } 163 164 static void wait_controller_finished(struct hinfc_host *host) 165 { 166 unsigned long timeout = jiffies + HINFC504_NFC_TIMEOUT; 167 int val; 168 169 while (time_before(jiffies, timeout)) { 170 val = hinfc_read(host, HINFC504_STATUS); 171 if (host->command == NAND_CMD_ERASE2) { 172 /* nfc is ready */ 173 while (!(val & HINFC504_READY)) { 174 usleep_range(500, 1000); 175 val = hinfc_read(host, HINFC504_STATUS); 176 } 177 return; 178 } 179 180 if (val & HINFC504_READY) 181 return; 182 } 183 184 /* wait cmd timeout */ 185 dev_err(host->dev, "Wait NAND controller exec cmd timeout.\n"); 186 } 187 188 static void hisi_nfc_dma_transfer(struct hinfc_host *host, int todev) 189 { 190 struct nand_chip *chip = &host->chip; 191 struct mtd_info *mtd = nand_to_mtd(chip); 192 unsigned long val; 193 int ret; 194 195 hinfc_write(host, host->dma_buffer, HINFC504_DMA_ADDR_DATA); 196 hinfc_write(host, host->dma_oob, HINFC504_DMA_ADDR_OOB); 197 198 if (chip->ecc.mode == NAND_ECC_NONE) { 199 hinfc_write(host, ((mtd->oobsize & HINFC504_DMA_LEN_OOB_MASK) 200 << HINFC504_DMA_LEN_OOB_SHIFT), HINFC504_DMA_LEN); 201 202 hinfc_write(host, HINFC504_DMA_PARA_DATA_RW_EN 203 | HINFC504_DMA_PARA_OOB_RW_EN, HINFC504_DMA_PARA); 204 } else { 205 if (host->command == NAND_CMD_READOOB) 206 hinfc_write(host, HINFC504_DMA_PARA_OOB_RW_EN 207 | HINFC504_DMA_PARA_OOB_EDC_EN 208 | HINFC504_DMA_PARA_OOB_ECC_EN, HINFC504_DMA_PARA); 209 else 210 hinfc_write(host, HINFC504_DMA_PARA_DATA_RW_EN 211 | HINFC504_DMA_PARA_OOB_RW_EN 212 | HINFC504_DMA_PARA_DATA_EDC_EN 213 | HINFC504_DMA_PARA_OOB_EDC_EN 214 | HINFC504_DMA_PARA_DATA_ECC_EN 215 | HINFC504_DMA_PARA_OOB_ECC_EN, HINFC504_DMA_PARA); 216 217 } 218 219 val = (HINFC504_DMA_CTRL_DMA_START | HINFC504_DMA_CTRL_BURST4_EN 220 | HINFC504_DMA_CTRL_BURST8_EN | HINFC504_DMA_CTRL_BURST16_EN 221 | HINFC504_DMA_CTRL_DATA_AREA_EN | HINFC504_DMA_CTRL_OOB_AREA_EN 222 | ((host->addr_cycle == 4 ? 1 : 0) 223 << HINFC504_DMA_CTRL_ADDR_NUM_SHIFT) 224 | ((host->chipselect & HINFC504_DMA_CTRL_CS_MASK) 225 << HINFC504_DMA_CTRL_CS_SHIFT)); 226 227 if (todev) 228 val |= HINFC504_DMA_CTRL_WE; 229 230 init_completion(&host->cmd_complete); 231 232 hinfc_write(host, val, HINFC504_DMA_CTRL); 233 ret = wait_for_completion_timeout(&host->cmd_complete, 234 HINFC504_NFC_DMA_TIMEOUT); 235 236 if (!ret) { 237 dev_err(host->dev, "DMA operation(irq) timeout!\n"); 238 /* sanity check */ 239 val = hinfc_read(host, HINFC504_DMA_CTRL); 240 if (!(val & HINFC504_DMA_CTRL_DMA_START)) 241 dev_err(host->dev, "DMA is already done but without irq ACK!\n"); 242 else 243 dev_err(host->dev, "DMA is really timeout!\n"); 244 } 245 } 246 247 static int hisi_nfc_send_cmd_pageprog(struct hinfc_host *host) 248 { 249 host->addr_value[0] &= 0xffff0000; 250 251 hinfc_write(host, host->addr_value[0], HINFC504_ADDRL); 252 hinfc_write(host, host->addr_value[1], HINFC504_ADDRH); 253 hinfc_write(host, NAND_CMD_PAGEPROG << 8 | NAND_CMD_SEQIN, 254 HINFC504_CMD); 255 256 hisi_nfc_dma_transfer(host, 1); 257 258 return 0; 259 } 260 261 static int hisi_nfc_send_cmd_readstart(struct hinfc_host *host) 262 { 263 struct mtd_info *mtd = nand_to_mtd(&host->chip); 264 265 if ((host->addr_value[0] == host->cache_addr_value[0]) && 266 (host->addr_value[1] == host->cache_addr_value[1])) 267 return 0; 268 269 host->addr_value[0] &= 0xffff0000; 270 271 hinfc_write(host, host->addr_value[0], HINFC504_ADDRL); 272 hinfc_write(host, host->addr_value[1], HINFC504_ADDRH); 273 hinfc_write(host, NAND_CMD_READSTART << 8 | NAND_CMD_READ0, 274 HINFC504_CMD); 275 276 hinfc_write(host, 0, HINFC504_LOG_READ_ADDR); 277 hinfc_write(host, mtd->writesize + mtd->oobsize, 278 HINFC504_LOG_READ_LEN); 279 280 hisi_nfc_dma_transfer(host, 0); 281 282 host->cache_addr_value[0] = host->addr_value[0]; 283 host->cache_addr_value[1] = host->addr_value[1]; 284 285 return 0; 286 } 287 288 static int hisi_nfc_send_cmd_erase(struct hinfc_host *host) 289 { 290 hinfc_write(host, host->addr_value[0], HINFC504_ADDRL); 291 hinfc_write(host, (NAND_CMD_ERASE2 << 8) | NAND_CMD_ERASE1, 292 HINFC504_CMD); 293 294 hinfc_write(host, HINFC504_OP_WAIT_READY_EN 295 | HINFC504_OP_CMD2_EN 296 | HINFC504_OP_CMD1_EN 297 | HINFC504_OP_ADDR_EN 298 | ((host->chipselect & HINFC504_OP_NF_CS_MASK) 299 << HINFC504_OP_NF_CS_SHIFT) 300 | ((host->addr_cycle & HINFC504_OP_ADDR_CYCLE_MASK) 301 << HINFC504_OP_ADDR_CYCLE_SHIFT), 302 HINFC504_OP); 303 304 wait_controller_finished(host); 305 306 return 0; 307 } 308 309 static int hisi_nfc_send_cmd_readid(struct hinfc_host *host) 310 { 311 hinfc_write(host, HINFC504_NANDINFO_LEN, HINFC504_DATA_NUM); 312 hinfc_write(host, NAND_CMD_READID, HINFC504_CMD); 313 hinfc_write(host, 0, HINFC504_ADDRL); 314 315 hinfc_write(host, HINFC504_OP_CMD1_EN | HINFC504_OP_ADDR_EN 316 | HINFC504_OP_READ_DATA_EN 317 | ((host->chipselect & HINFC504_OP_NF_CS_MASK) 318 << HINFC504_OP_NF_CS_SHIFT) 319 | 1 << HINFC504_OP_ADDR_CYCLE_SHIFT, HINFC504_OP); 320 321 wait_controller_finished(host); 322 323 return 0; 324 } 325 326 static int hisi_nfc_send_cmd_status(struct hinfc_host *host) 327 { 328 hinfc_write(host, HINFC504_NANDINFO_LEN, HINFC504_DATA_NUM); 329 hinfc_write(host, NAND_CMD_STATUS, HINFC504_CMD); 330 hinfc_write(host, HINFC504_OP_CMD1_EN 331 | HINFC504_OP_READ_DATA_EN 332 | ((host->chipselect & HINFC504_OP_NF_CS_MASK) 333 << HINFC504_OP_NF_CS_SHIFT), 334 HINFC504_OP); 335 336 wait_controller_finished(host); 337 338 return 0; 339 } 340 341 static int hisi_nfc_send_cmd_reset(struct hinfc_host *host, int chipselect) 342 { 343 hinfc_write(host, NAND_CMD_RESET, HINFC504_CMD); 344 345 hinfc_write(host, HINFC504_OP_CMD1_EN 346 | ((chipselect & HINFC504_OP_NF_CS_MASK) 347 << HINFC504_OP_NF_CS_SHIFT) 348 | HINFC504_OP_WAIT_READY_EN, 349 HINFC504_OP); 350 351 wait_controller_finished(host); 352 353 return 0; 354 } 355 356 static void hisi_nfc_select_chip(struct nand_chip *chip, int chipselect) 357 { 358 struct hinfc_host *host = nand_get_controller_data(chip); 359 360 if (chipselect < 0) 361 return; 362 363 host->chipselect = chipselect; 364 } 365 366 static uint8_t hisi_nfc_read_byte(struct nand_chip *chip) 367 { 368 struct hinfc_host *host = nand_get_controller_data(chip); 369 370 if (host->command == NAND_CMD_STATUS) 371 return *(uint8_t *)(host->mmio); 372 373 host->offset++; 374 375 if (host->command == NAND_CMD_READID) 376 return *(uint8_t *)(host->mmio + host->offset - 1); 377 378 return *(uint8_t *)(host->buffer + host->offset - 1); 379 } 380 381 static void 382 hisi_nfc_write_buf(struct nand_chip *chip, const uint8_t *buf, int len) 383 { 384 struct hinfc_host *host = nand_get_controller_data(chip); 385 386 memcpy(host->buffer + host->offset, buf, len); 387 host->offset += len; 388 } 389 390 static void hisi_nfc_read_buf(struct nand_chip *chip, uint8_t *buf, int len) 391 { 392 struct hinfc_host *host = nand_get_controller_data(chip); 393 394 memcpy(buf, host->buffer + host->offset, len); 395 host->offset += len; 396 } 397 398 static void set_addr(struct mtd_info *mtd, int column, int page_addr) 399 { 400 struct nand_chip *chip = mtd_to_nand(mtd); 401 struct hinfc_host *host = nand_get_controller_data(chip); 402 unsigned int command = host->command; 403 404 host->addr_cycle = 0; 405 host->addr_value[0] = 0; 406 host->addr_value[1] = 0; 407 408 /* Serially input address */ 409 if (column != -1) { 410 /* Adjust columns for 16 bit buswidth */ 411 if (chip->options & NAND_BUSWIDTH_16 && 412 !nand_opcode_8bits(command)) 413 column >>= 1; 414 415 host->addr_value[0] = column & 0xffff; 416 host->addr_cycle = 2; 417 } 418 if (page_addr != -1) { 419 host->addr_value[0] |= (page_addr & 0xffff) 420 << (host->addr_cycle * 8); 421 host->addr_cycle += 2; 422 if (chip->options & NAND_ROW_ADDR_3) { 423 host->addr_cycle += 1; 424 if (host->command == NAND_CMD_ERASE1) 425 host->addr_value[0] |= ((page_addr >> 16) & 0xff) << 16; 426 else 427 host->addr_value[1] |= ((page_addr >> 16) & 0xff); 428 } 429 } 430 } 431 432 static void hisi_nfc_cmdfunc(struct nand_chip *chip, unsigned command, 433 int column, int page_addr) 434 { 435 struct mtd_info *mtd = nand_to_mtd(chip); 436 struct hinfc_host *host = nand_get_controller_data(chip); 437 int is_cache_invalid = 1; 438 unsigned int flag = 0; 439 440 host->command = command; 441 442 switch (command) { 443 case NAND_CMD_READ0: 444 case NAND_CMD_READOOB: 445 if (command == NAND_CMD_READ0) 446 host->offset = column; 447 else 448 host->offset = column + mtd->writesize; 449 450 is_cache_invalid = 0; 451 set_addr(mtd, column, page_addr); 452 hisi_nfc_send_cmd_readstart(host); 453 break; 454 455 case NAND_CMD_SEQIN: 456 host->offset = column; 457 set_addr(mtd, column, page_addr); 458 break; 459 460 case NAND_CMD_ERASE1: 461 set_addr(mtd, column, page_addr); 462 break; 463 464 case NAND_CMD_PAGEPROG: 465 hisi_nfc_send_cmd_pageprog(host); 466 break; 467 468 case NAND_CMD_ERASE2: 469 hisi_nfc_send_cmd_erase(host); 470 break; 471 472 case NAND_CMD_READID: 473 host->offset = column; 474 memset(host->mmio, 0, 0x10); 475 hisi_nfc_send_cmd_readid(host); 476 break; 477 478 case NAND_CMD_STATUS: 479 flag = hinfc_read(host, HINFC504_CON); 480 if (chip->ecc.mode == NAND_ECC_HW) 481 hinfc_write(host, 482 flag & ~(HINFC504_CON_ECCTYPE_MASK << 483 HINFC504_CON_ECCTYPE_SHIFT), HINFC504_CON); 484 485 host->offset = 0; 486 memset(host->mmio, 0, 0x10); 487 hisi_nfc_send_cmd_status(host); 488 hinfc_write(host, flag, HINFC504_CON); 489 break; 490 491 case NAND_CMD_RESET: 492 hisi_nfc_send_cmd_reset(host, host->chipselect); 493 break; 494 495 default: 496 dev_err(host->dev, "Error: unsupported cmd(cmd=%x, col=%x, page=%x)\n", 497 command, column, page_addr); 498 } 499 500 if (is_cache_invalid) { 501 host->cache_addr_value[0] = ~0; 502 host->cache_addr_value[1] = ~0; 503 } 504 } 505 506 static irqreturn_t hinfc_irq_handle(int irq, void *devid) 507 { 508 struct hinfc_host *host = devid; 509 unsigned int flag; 510 511 flag = hinfc_read(host, HINFC504_INTS); 512 /* store interrupts state */ 513 host->irq_status |= flag; 514 515 if (flag & HINFC504_INTS_DMA) { 516 hinfc_write(host, HINFC504_INTCLR_DMA, HINFC504_INTCLR); 517 complete(&host->cmd_complete); 518 } else if (flag & HINFC504_INTS_CE) { 519 hinfc_write(host, HINFC504_INTCLR_CE, HINFC504_INTCLR); 520 } else if (flag & HINFC504_INTS_UE) { 521 hinfc_write(host, HINFC504_INTCLR_UE, HINFC504_INTCLR); 522 } 523 524 return IRQ_HANDLED; 525 } 526 527 static int hisi_nand_read_page_hwecc(struct nand_chip *chip, uint8_t *buf, 528 int oob_required, int page) 529 { 530 struct mtd_info *mtd = nand_to_mtd(chip); 531 struct hinfc_host *host = nand_get_controller_data(chip); 532 int max_bitflips = 0, stat = 0, stat_max = 0, status_ecc; 533 int stat_1, stat_2; 534 535 nand_read_page_op(chip, page, 0, buf, mtd->writesize); 536 chip->legacy.read_buf(chip, chip->oob_poi, mtd->oobsize); 537 538 /* errors which can not be corrected by ECC */ 539 if (host->irq_status & HINFC504_INTS_UE) { 540 mtd->ecc_stats.failed++; 541 } else if (host->irq_status & HINFC504_INTS_CE) { 542 /* TODO: need add other ECC modes! */ 543 switch (chip->ecc.strength) { 544 case 16: 545 status_ecc = hinfc_read(host, HINFC504_ECC_STATUS) >> 546 HINFC504_ECC_16_BIT_SHIFT & 0x0fff; 547 stat_2 = status_ecc & 0x3f; 548 stat_1 = status_ecc >> 6 & 0x3f; 549 stat = stat_1 + stat_2; 550 stat_max = max_t(int, stat_1, stat_2); 551 } 552 mtd->ecc_stats.corrected += stat; 553 max_bitflips = max_t(int, max_bitflips, stat_max); 554 } 555 host->irq_status = 0; 556 557 return max_bitflips; 558 } 559 560 static int hisi_nand_read_oob(struct nand_chip *chip, int page) 561 { 562 struct mtd_info *mtd = nand_to_mtd(chip); 563 struct hinfc_host *host = nand_get_controller_data(chip); 564 565 nand_read_oob_op(chip, page, 0, chip->oob_poi, mtd->oobsize); 566 567 if (host->irq_status & HINFC504_INTS_UE) { 568 host->irq_status = 0; 569 return -EBADMSG; 570 } 571 572 host->irq_status = 0; 573 return 0; 574 } 575 576 static int hisi_nand_write_page_hwecc(struct nand_chip *chip, 577 const uint8_t *buf, int oob_required, 578 int page) 579 { 580 struct mtd_info *mtd = nand_to_mtd(chip); 581 582 nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize); 583 if (oob_required) 584 chip->legacy.write_buf(chip, chip->oob_poi, mtd->oobsize); 585 586 return nand_prog_page_end_op(chip); 587 } 588 589 static void hisi_nfc_host_init(struct hinfc_host *host) 590 { 591 struct nand_chip *chip = &host->chip; 592 unsigned int flag = 0; 593 594 host->version = hinfc_read(host, HINFC_VERSION); 595 host->addr_cycle = 0; 596 host->addr_value[0] = 0; 597 host->addr_value[1] = 0; 598 host->cache_addr_value[0] = ~0; 599 host->cache_addr_value[1] = ~0; 600 host->chipselect = 0; 601 602 /* default page size: 2K, ecc_none. need modify */ 603 flag = HINFC504_CON_OP_MODE_NORMAL | HINFC504_CON_READY_BUSY_SEL 604 | ((0x001 & HINFC504_CON_PAGESIZE_MASK) 605 << HINFC504_CON_PAGEISZE_SHIFT) 606 | ((0x0 & HINFC504_CON_ECCTYPE_MASK) 607 << HINFC504_CON_ECCTYPE_SHIFT) 608 | ((chip->options & NAND_BUSWIDTH_16) ? 609 HINFC504_CON_BUS_WIDTH : 0); 610 hinfc_write(host, flag, HINFC504_CON); 611 612 memset(host->mmio, 0xff, HINFC504_BUFFER_BASE_ADDRESS_LEN); 613 614 hinfc_write(host, SET_HINFC504_PWIDTH(HINFC504_W_LATCH, 615 HINFC504_R_LATCH, HINFC504_RW_LATCH), HINFC504_PWIDTH); 616 617 /* enable DMA irq */ 618 hinfc_write(host, HINFC504_INTEN_DMA, HINFC504_INTEN); 619 } 620 621 static int hisi_ooblayout_ecc(struct mtd_info *mtd, int section, 622 struct mtd_oob_region *oobregion) 623 { 624 /* FIXME: add ECC bytes position */ 625 return -ENOTSUPP; 626 } 627 628 static int hisi_ooblayout_free(struct mtd_info *mtd, int section, 629 struct mtd_oob_region *oobregion) 630 { 631 if (section) 632 return -ERANGE; 633 634 oobregion->offset = 2; 635 oobregion->length = 6; 636 637 return 0; 638 } 639 640 static const struct mtd_ooblayout_ops hisi_ooblayout_ops = { 641 .ecc = hisi_ooblayout_ecc, 642 .free = hisi_ooblayout_free, 643 }; 644 645 static int hisi_nfc_ecc_probe(struct hinfc_host *host) 646 { 647 unsigned int flag; 648 int size, strength, ecc_bits; 649 struct device *dev = host->dev; 650 struct nand_chip *chip = &host->chip; 651 struct mtd_info *mtd = nand_to_mtd(chip); 652 653 size = chip->ecc.size; 654 strength = chip->ecc.strength; 655 if (size != 1024) { 656 dev_err(dev, "error ecc size: %d\n", size); 657 return -EINVAL; 658 } 659 660 if ((size == 1024) && ((strength != 8) && (strength != 16) && 661 (strength != 24) && (strength != 40))) { 662 dev_err(dev, "ecc size and strength do not match\n"); 663 return -EINVAL; 664 } 665 666 chip->ecc.size = size; 667 chip->ecc.strength = strength; 668 669 chip->ecc.read_page = hisi_nand_read_page_hwecc; 670 chip->ecc.read_oob = hisi_nand_read_oob; 671 chip->ecc.write_page = hisi_nand_write_page_hwecc; 672 673 switch (chip->ecc.strength) { 674 case 16: 675 ecc_bits = 6; 676 if (mtd->writesize == 2048) 677 mtd_set_ooblayout(mtd, &hisi_ooblayout_ops); 678 679 /* TODO: add more page size support */ 680 break; 681 682 /* TODO: add more ecc strength support */ 683 default: 684 dev_err(dev, "not support strength: %d\n", chip->ecc.strength); 685 return -EINVAL; 686 } 687 688 flag = hinfc_read(host, HINFC504_CON); 689 /* add ecc type configure */ 690 flag |= ((ecc_bits & HINFC504_CON_ECCTYPE_MASK) 691 << HINFC504_CON_ECCTYPE_SHIFT); 692 hinfc_write(host, flag, HINFC504_CON); 693 694 /* enable ecc irq */ 695 flag = hinfc_read(host, HINFC504_INTEN) & 0xfff; 696 hinfc_write(host, flag | HINFC504_INTEN_UE | HINFC504_INTEN_CE, 697 HINFC504_INTEN); 698 699 return 0; 700 } 701 702 static int hisi_nfc_attach_chip(struct nand_chip *chip) 703 { 704 struct mtd_info *mtd = nand_to_mtd(chip); 705 struct hinfc_host *host = nand_get_controller_data(chip); 706 int flag; 707 708 host->buffer = dmam_alloc_coherent(host->dev, 709 mtd->writesize + mtd->oobsize, 710 &host->dma_buffer, GFP_KERNEL); 711 if (!host->buffer) 712 return -ENOMEM; 713 714 host->dma_oob = host->dma_buffer + mtd->writesize; 715 memset(host->buffer, 0xff, mtd->writesize + mtd->oobsize); 716 717 flag = hinfc_read(host, HINFC504_CON); 718 flag &= ~(HINFC504_CON_PAGESIZE_MASK << HINFC504_CON_PAGEISZE_SHIFT); 719 switch (mtd->writesize) { 720 case 2048: 721 flag |= (0x001 << HINFC504_CON_PAGEISZE_SHIFT); 722 break; 723 /* 724 * TODO: add more pagesize support, 725 * default pagesize has been set in hisi_nfc_host_init 726 */ 727 default: 728 dev_err(host->dev, "NON-2KB page size nand flash\n"); 729 return -EINVAL; 730 } 731 hinfc_write(host, flag, HINFC504_CON); 732 733 if (chip->ecc.mode == NAND_ECC_HW) 734 hisi_nfc_ecc_probe(host); 735 736 return 0; 737 } 738 739 static const struct nand_controller_ops hisi_nfc_controller_ops = { 740 .attach_chip = hisi_nfc_attach_chip, 741 }; 742 743 static int hisi_nfc_probe(struct platform_device *pdev) 744 { 745 int ret = 0, irq, max_chips = HINFC504_MAX_CHIP; 746 struct device *dev = &pdev->dev; 747 struct hinfc_host *host; 748 struct nand_chip *chip; 749 struct mtd_info *mtd; 750 struct resource *res; 751 struct device_node *np = dev->of_node; 752 753 host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL); 754 if (!host) 755 return -ENOMEM; 756 host->dev = dev; 757 758 platform_set_drvdata(pdev, host); 759 chip = &host->chip; 760 mtd = nand_to_mtd(chip); 761 762 irq = platform_get_irq(pdev, 0); 763 if (irq < 0) { 764 dev_err(dev, "no IRQ resource defined\n"); 765 return -ENXIO; 766 } 767 768 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 769 host->iobase = devm_ioremap_resource(dev, res); 770 if (IS_ERR(host->iobase)) 771 return PTR_ERR(host->iobase); 772 773 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 774 host->mmio = devm_ioremap_resource(dev, res); 775 if (IS_ERR(host->mmio)) { 776 dev_err(dev, "devm_ioremap_resource[1] fail\n"); 777 return PTR_ERR(host->mmio); 778 } 779 780 mtd->name = "hisi_nand"; 781 mtd->dev.parent = &pdev->dev; 782 783 nand_set_controller_data(chip, host); 784 nand_set_flash_node(chip, np); 785 chip->legacy.cmdfunc = hisi_nfc_cmdfunc; 786 chip->legacy.select_chip = hisi_nfc_select_chip; 787 chip->legacy.read_byte = hisi_nfc_read_byte; 788 chip->legacy.write_buf = hisi_nfc_write_buf; 789 chip->legacy.read_buf = hisi_nfc_read_buf; 790 chip->legacy.chip_delay = HINFC504_CHIP_DELAY; 791 chip->legacy.set_features = nand_get_set_features_notsupp; 792 chip->legacy.get_features = nand_get_set_features_notsupp; 793 794 hisi_nfc_host_init(host); 795 796 ret = devm_request_irq(dev, irq, hinfc_irq_handle, 0x0, "nandc", host); 797 if (ret) { 798 dev_err(dev, "failed to request IRQ\n"); 799 return ret; 800 } 801 802 chip->legacy.dummy_controller.ops = &hisi_nfc_controller_ops; 803 ret = nand_scan(chip, max_chips); 804 if (ret) 805 return ret; 806 807 ret = mtd_device_register(mtd, NULL, 0); 808 if (ret) { 809 dev_err(dev, "Err MTD partition=%d\n", ret); 810 nand_cleanup(chip); 811 return ret; 812 } 813 814 return 0; 815 } 816 817 static int hisi_nfc_remove(struct platform_device *pdev) 818 { 819 struct hinfc_host *host = platform_get_drvdata(pdev); 820 821 nand_release(&host->chip); 822 823 return 0; 824 } 825 826 #ifdef CONFIG_PM_SLEEP 827 static int hisi_nfc_suspend(struct device *dev) 828 { 829 struct hinfc_host *host = dev_get_drvdata(dev); 830 unsigned long timeout = jiffies + HINFC504_NFC_PM_TIMEOUT; 831 832 while (time_before(jiffies, timeout)) { 833 if (((hinfc_read(host, HINFC504_STATUS) & 0x1) == 0x0) && 834 (hinfc_read(host, HINFC504_DMA_CTRL) & 835 HINFC504_DMA_CTRL_DMA_START)) { 836 cond_resched(); 837 return 0; 838 } 839 } 840 841 dev_err(host->dev, "nand controller suspend timeout.\n"); 842 843 return -EAGAIN; 844 } 845 846 static int hisi_nfc_resume(struct device *dev) 847 { 848 int cs; 849 struct hinfc_host *host = dev_get_drvdata(dev); 850 struct nand_chip *chip = &host->chip; 851 852 for (cs = 0; cs < chip->numchips; cs++) 853 hisi_nfc_send_cmd_reset(host, cs); 854 hinfc_write(host, SET_HINFC504_PWIDTH(HINFC504_W_LATCH, 855 HINFC504_R_LATCH, HINFC504_RW_LATCH), HINFC504_PWIDTH); 856 857 return 0; 858 } 859 #endif 860 static SIMPLE_DEV_PM_OPS(hisi_nfc_pm_ops, hisi_nfc_suspend, hisi_nfc_resume); 861 862 static const struct of_device_id nfc_id_table[] = { 863 { .compatible = "hisilicon,504-nfc" }, 864 {} 865 }; 866 MODULE_DEVICE_TABLE(of, nfc_id_table); 867 868 static struct platform_driver hisi_nfc_driver = { 869 .driver = { 870 .name = "hisi_nand", 871 .of_match_table = nfc_id_table, 872 .pm = &hisi_nfc_pm_ops, 873 }, 874 .probe = hisi_nfc_probe, 875 .remove = hisi_nfc_remove, 876 }; 877 878 module_platform_driver(hisi_nfc_driver); 879 880 MODULE_LICENSE("GPL"); 881 MODULE_AUTHOR("Zhou Wang"); 882 MODULE_AUTHOR("Zhiyong Cai"); 883 MODULE_DESCRIPTION("Hisilicon Nand Flash Controller Driver"); 884