1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright © 2010-2015 Broadcom Corporation 4 */ 5 6 #include <linux/clk.h> 7 #include <linux/module.h> 8 #include <linux/init.h> 9 #include <linux/delay.h> 10 #include <linux/device.h> 11 #include <linux/platform_device.h> 12 #include <linux/err.h> 13 #include <linux/completion.h> 14 #include <linux/interrupt.h> 15 #include <linux/spinlock.h> 16 #include <linux/dma-mapping.h> 17 #include <linux/ioport.h> 18 #include <linux/bug.h> 19 #include <linux/kernel.h> 20 #include <linux/bitops.h> 21 #include <linux/mm.h> 22 #include <linux/mtd/mtd.h> 23 #include <linux/mtd/rawnand.h> 24 #include <linux/mtd/partitions.h> 25 #include <linux/of.h> 26 #include <linux/of_platform.h> 27 #include <linux/slab.h> 28 #include <linux/list.h> 29 #include <linux/log2.h> 30 31 #include "brcmnand.h" 32 33 /* 34 * This flag controls if WP stays on between erase/write commands to mitigate 35 * flash corruption due to power glitches. Values: 36 * 0: NAND_WP is not used or not available 37 * 1: NAND_WP is set by default, cleared for erase/write operations 38 * 2: NAND_WP is always cleared 39 */ 40 static int wp_on = 1; 41 module_param(wp_on, int, 0444); 42 43 /*********************************************************************** 44 * Definitions 45 ***********************************************************************/ 46 47 #define DRV_NAME "brcmnand" 48 49 #define CMD_NULL 0x00 50 #define CMD_PAGE_READ 0x01 51 #define CMD_SPARE_AREA_READ 0x02 52 #define CMD_STATUS_READ 0x03 53 #define CMD_PROGRAM_PAGE 0x04 54 #define CMD_PROGRAM_SPARE_AREA 0x05 55 #define CMD_COPY_BACK 0x06 56 #define CMD_DEVICE_ID_READ 0x07 57 #define CMD_BLOCK_ERASE 0x08 58 #define CMD_FLASH_RESET 0x09 59 #define CMD_BLOCKS_LOCK 0x0a 60 #define CMD_BLOCKS_LOCK_DOWN 0x0b 61 #define CMD_BLOCKS_UNLOCK 0x0c 62 #define CMD_READ_BLOCKS_LOCK_STATUS 0x0d 63 #define CMD_PARAMETER_READ 0x0e 64 #define CMD_PARAMETER_CHANGE_COL 0x0f 65 #define CMD_LOW_LEVEL_OP 0x10 66 67 struct brcm_nand_dma_desc { 68 u32 next_desc; 69 u32 next_desc_ext; 70 u32 cmd_irq; 71 u32 dram_addr; 72 u32 dram_addr_ext; 73 u32 tfr_len; 74 u32 total_len; 75 u32 flash_addr; 76 u32 flash_addr_ext; 77 u32 cs; 78 u32 pad2[5]; 79 u32 status_valid; 80 } __packed; 81 82 /* Bitfields for brcm_nand_dma_desc::status_valid */ 83 #define FLASH_DMA_ECC_ERROR (1 << 8) 84 #define FLASH_DMA_CORR_ERROR (1 << 9) 85 86 /* Bitfields for DMA_MODE */ 87 #define FLASH_DMA_MODE_STOP_ON_ERROR BIT(1) /* stop in Uncorr ECC error */ 88 #define FLASH_DMA_MODE_MODE BIT(0) /* link list */ 89 #define FLASH_DMA_MODE_MASK (FLASH_DMA_MODE_STOP_ON_ERROR | \ 90 FLASH_DMA_MODE_MODE) 91 92 /* 512B flash cache in the NAND controller HW */ 93 #define FC_SHIFT 9U 94 #define FC_BYTES 512U 95 #define FC_WORDS (FC_BYTES >> 2) 96 97 #define BRCMNAND_MIN_PAGESIZE 512 98 #define BRCMNAND_MIN_BLOCKSIZE (8 * 1024) 99 #define BRCMNAND_MIN_DEVSIZE (4ULL * 1024 * 1024) 100 101 #define NAND_CTRL_RDY (INTFC_CTLR_READY | INTFC_FLASH_READY) 102 #define NAND_POLL_STATUS_TIMEOUT_MS 100 103 104 #define EDU_CMD_WRITE 0x00 105 #define EDU_CMD_READ 0x01 106 #define EDU_STATUS_ACTIVE BIT(0) 107 #define EDU_ERR_STATUS_ERRACK BIT(0) 108 #define EDU_DONE_MASK GENMASK(1, 0) 109 110 #define EDU_CONFIG_MODE_NAND BIT(0) 111 #define EDU_CONFIG_SWAP_BYTE BIT(1) 112 #ifdef CONFIG_CPU_BIG_ENDIAN 113 #define EDU_CONFIG_SWAP_CFG EDU_CONFIG_SWAP_BYTE 114 #else 115 #define EDU_CONFIG_SWAP_CFG 0 116 #endif 117 118 /* edu registers */ 119 enum edu_reg { 120 EDU_CONFIG = 0, 121 EDU_DRAM_ADDR, 122 EDU_EXT_ADDR, 123 EDU_LENGTH, 124 EDU_CMD, 125 EDU_STOP, 126 EDU_STATUS, 127 EDU_DONE, 128 EDU_ERR_STATUS, 129 }; 130 131 static const u16 edu_regs[] = { 132 [EDU_CONFIG] = 0x00, 133 [EDU_DRAM_ADDR] = 0x04, 134 [EDU_EXT_ADDR] = 0x08, 135 [EDU_LENGTH] = 0x0c, 136 [EDU_CMD] = 0x10, 137 [EDU_STOP] = 0x14, 138 [EDU_STATUS] = 0x18, 139 [EDU_DONE] = 0x1c, 140 [EDU_ERR_STATUS] = 0x20, 141 }; 142 143 /* flash_dma registers */ 144 enum flash_dma_reg { 145 FLASH_DMA_REVISION = 0, 146 FLASH_DMA_FIRST_DESC, 147 FLASH_DMA_FIRST_DESC_EXT, 148 FLASH_DMA_CTRL, 149 FLASH_DMA_MODE, 150 FLASH_DMA_STATUS, 151 FLASH_DMA_INTERRUPT_DESC, 152 FLASH_DMA_INTERRUPT_DESC_EXT, 153 FLASH_DMA_ERROR_STATUS, 154 FLASH_DMA_CURRENT_DESC, 155 FLASH_DMA_CURRENT_DESC_EXT, 156 }; 157 158 /* flash_dma registers v0*/ 159 static const u16 flash_dma_regs_v0[] = { 160 [FLASH_DMA_REVISION] = 0x00, 161 [FLASH_DMA_FIRST_DESC] = 0x04, 162 [FLASH_DMA_CTRL] = 0x08, 163 [FLASH_DMA_MODE] = 0x0c, 164 [FLASH_DMA_STATUS] = 0x10, 165 [FLASH_DMA_INTERRUPT_DESC] = 0x14, 166 [FLASH_DMA_ERROR_STATUS] = 0x18, 167 [FLASH_DMA_CURRENT_DESC] = 0x1c, 168 }; 169 170 /* flash_dma registers v1*/ 171 static const u16 flash_dma_regs_v1[] = { 172 [FLASH_DMA_REVISION] = 0x00, 173 [FLASH_DMA_FIRST_DESC] = 0x04, 174 [FLASH_DMA_FIRST_DESC_EXT] = 0x08, 175 [FLASH_DMA_CTRL] = 0x0c, 176 [FLASH_DMA_MODE] = 0x10, 177 [FLASH_DMA_STATUS] = 0x14, 178 [FLASH_DMA_INTERRUPT_DESC] = 0x18, 179 [FLASH_DMA_INTERRUPT_DESC_EXT] = 0x1c, 180 [FLASH_DMA_ERROR_STATUS] = 0x20, 181 [FLASH_DMA_CURRENT_DESC] = 0x24, 182 [FLASH_DMA_CURRENT_DESC_EXT] = 0x28, 183 }; 184 185 /* flash_dma registers v4 */ 186 static const u16 flash_dma_regs_v4[] = { 187 [FLASH_DMA_REVISION] = 0x00, 188 [FLASH_DMA_FIRST_DESC] = 0x08, 189 [FLASH_DMA_FIRST_DESC_EXT] = 0x0c, 190 [FLASH_DMA_CTRL] = 0x10, 191 [FLASH_DMA_MODE] = 0x14, 192 [FLASH_DMA_STATUS] = 0x18, 193 [FLASH_DMA_INTERRUPT_DESC] = 0x20, 194 [FLASH_DMA_INTERRUPT_DESC_EXT] = 0x24, 195 [FLASH_DMA_ERROR_STATUS] = 0x28, 196 [FLASH_DMA_CURRENT_DESC] = 0x30, 197 [FLASH_DMA_CURRENT_DESC_EXT] = 0x34, 198 }; 199 200 /* Controller feature flags */ 201 enum { 202 BRCMNAND_HAS_1K_SECTORS = BIT(0), 203 BRCMNAND_HAS_PREFETCH = BIT(1), 204 BRCMNAND_HAS_CACHE_MODE = BIT(2), 205 BRCMNAND_HAS_WP = BIT(3), 206 }; 207 208 struct brcmnand_host; 209 210 struct brcmnand_controller { 211 struct device *dev; 212 struct nand_controller controller; 213 void __iomem *nand_base; 214 void __iomem *nand_fc; /* flash cache */ 215 void __iomem *flash_dma_base; 216 unsigned int irq; 217 unsigned int dma_irq; 218 int nand_version; 219 220 /* Some SoCs provide custom interrupt status register(s) */ 221 struct brcmnand_soc *soc; 222 223 /* Some SoCs have a gateable clock for the controller */ 224 struct clk *clk; 225 226 int cmd_pending; 227 bool dma_pending; 228 bool edu_pending; 229 struct completion done; 230 struct completion dma_done; 231 struct completion edu_done; 232 233 /* List of NAND hosts (one for each chip-select) */ 234 struct list_head host_list; 235 236 /* EDU info, per-transaction */ 237 const u16 *edu_offsets; 238 void __iomem *edu_base; 239 int edu_irq; 240 int edu_count; 241 u64 edu_dram_addr; 242 u32 edu_ext_addr; 243 u32 edu_cmd; 244 u32 edu_config; 245 246 /* flash_dma reg */ 247 const u16 *flash_dma_offsets; 248 struct brcm_nand_dma_desc *dma_desc; 249 dma_addr_t dma_pa; 250 251 int (*dma_trans)(struct brcmnand_host *host, u64 addr, u32 *buf, 252 u32 len, u8 dma_cmd); 253 254 /* in-memory cache of the FLASH_CACHE, used only for some commands */ 255 u8 flash_cache[FC_BYTES]; 256 257 /* Controller revision details */ 258 const u16 *reg_offsets; 259 unsigned int reg_spacing; /* between CS1, CS2, ... regs */ 260 const u8 *cs_offsets; /* within each chip-select */ 261 const u8 *cs0_offsets; /* within CS0, if different */ 262 unsigned int max_block_size; 263 const unsigned int *block_sizes; 264 unsigned int max_page_size; 265 const unsigned int *page_sizes; 266 unsigned int max_oob; 267 u32 features; 268 269 /* for low-power standby/resume only */ 270 u32 nand_cs_nand_select; 271 u32 nand_cs_nand_xor; 272 u32 corr_stat_threshold; 273 u32 flash_dma_mode; 274 u32 flash_edu_mode; 275 bool pio_poll_mode; 276 }; 277 278 struct brcmnand_cfg { 279 u64 device_size; 280 unsigned int block_size; 281 unsigned int page_size; 282 unsigned int spare_area_size; 283 unsigned int device_width; 284 unsigned int col_adr_bytes; 285 unsigned int blk_adr_bytes; 286 unsigned int ful_adr_bytes; 287 unsigned int sector_size_1k; 288 unsigned int ecc_level; 289 /* use for low-power standby/resume only */ 290 u32 acc_control; 291 u32 config; 292 u32 config_ext; 293 u32 timing_1; 294 u32 timing_2; 295 }; 296 297 struct brcmnand_host { 298 struct list_head node; 299 300 struct nand_chip chip; 301 struct platform_device *pdev; 302 int cs; 303 304 unsigned int last_cmd; 305 unsigned int last_byte; 306 u64 last_addr; 307 struct brcmnand_cfg hwcfg; 308 struct brcmnand_controller *ctrl; 309 }; 310 311 enum brcmnand_reg { 312 BRCMNAND_CMD_START = 0, 313 BRCMNAND_CMD_EXT_ADDRESS, 314 BRCMNAND_CMD_ADDRESS, 315 BRCMNAND_INTFC_STATUS, 316 BRCMNAND_CS_SELECT, 317 BRCMNAND_CS_XOR, 318 BRCMNAND_LL_OP, 319 BRCMNAND_CS0_BASE, 320 BRCMNAND_CS1_BASE, /* CS1 regs, if non-contiguous */ 321 BRCMNAND_CORR_THRESHOLD, 322 BRCMNAND_CORR_THRESHOLD_EXT, 323 BRCMNAND_UNCORR_COUNT, 324 BRCMNAND_CORR_COUNT, 325 BRCMNAND_CORR_EXT_ADDR, 326 BRCMNAND_CORR_ADDR, 327 BRCMNAND_UNCORR_EXT_ADDR, 328 BRCMNAND_UNCORR_ADDR, 329 BRCMNAND_SEMAPHORE, 330 BRCMNAND_ID, 331 BRCMNAND_ID_EXT, 332 BRCMNAND_LL_RDATA, 333 BRCMNAND_OOB_READ_BASE, 334 BRCMNAND_OOB_READ_10_BASE, /* offset 0x10, if non-contiguous */ 335 BRCMNAND_OOB_WRITE_BASE, 336 BRCMNAND_OOB_WRITE_10_BASE, /* offset 0x10, if non-contiguous */ 337 BRCMNAND_FC_BASE, 338 }; 339 340 /* BRCMNAND v3.3-v4.0 */ 341 static const u16 brcmnand_regs_v33[] = { 342 [BRCMNAND_CMD_START] = 0x04, 343 [BRCMNAND_CMD_EXT_ADDRESS] = 0x08, 344 [BRCMNAND_CMD_ADDRESS] = 0x0c, 345 [BRCMNAND_INTFC_STATUS] = 0x6c, 346 [BRCMNAND_CS_SELECT] = 0x14, 347 [BRCMNAND_CS_XOR] = 0x18, 348 [BRCMNAND_LL_OP] = 0x178, 349 [BRCMNAND_CS0_BASE] = 0x40, 350 [BRCMNAND_CS1_BASE] = 0xd0, 351 [BRCMNAND_CORR_THRESHOLD] = 0x84, 352 [BRCMNAND_CORR_THRESHOLD_EXT] = 0, 353 [BRCMNAND_UNCORR_COUNT] = 0, 354 [BRCMNAND_CORR_COUNT] = 0, 355 [BRCMNAND_CORR_EXT_ADDR] = 0x70, 356 [BRCMNAND_CORR_ADDR] = 0x74, 357 [BRCMNAND_UNCORR_EXT_ADDR] = 0x78, 358 [BRCMNAND_UNCORR_ADDR] = 0x7c, 359 [BRCMNAND_SEMAPHORE] = 0x58, 360 [BRCMNAND_ID] = 0x60, 361 [BRCMNAND_ID_EXT] = 0x64, 362 [BRCMNAND_LL_RDATA] = 0x17c, 363 [BRCMNAND_OOB_READ_BASE] = 0x20, 364 [BRCMNAND_OOB_READ_10_BASE] = 0x130, 365 [BRCMNAND_OOB_WRITE_BASE] = 0x30, 366 [BRCMNAND_OOB_WRITE_10_BASE] = 0, 367 [BRCMNAND_FC_BASE] = 0x200, 368 }; 369 370 /* BRCMNAND v5.0 */ 371 static const u16 brcmnand_regs_v50[] = { 372 [BRCMNAND_CMD_START] = 0x04, 373 [BRCMNAND_CMD_EXT_ADDRESS] = 0x08, 374 [BRCMNAND_CMD_ADDRESS] = 0x0c, 375 [BRCMNAND_INTFC_STATUS] = 0x6c, 376 [BRCMNAND_CS_SELECT] = 0x14, 377 [BRCMNAND_CS_XOR] = 0x18, 378 [BRCMNAND_LL_OP] = 0x178, 379 [BRCMNAND_CS0_BASE] = 0x40, 380 [BRCMNAND_CS1_BASE] = 0xd0, 381 [BRCMNAND_CORR_THRESHOLD] = 0x84, 382 [BRCMNAND_CORR_THRESHOLD_EXT] = 0, 383 [BRCMNAND_UNCORR_COUNT] = 0, 384 [BRCMNAND_CORR_COUNT] = 0, 385 [BRCMNAND_CORR_EXT_ADDR] = 0x70, 386 [BRCMNAND_CORR_ADDR] = 0x74, 387 [BRCMNAND_UNCORR_EXT_ADDR] = 0x78, 388 [BRCMNAND_UNCORR_ADDR] = 0x7c, 389 [BRCMNAND_SEMAPHORE] = 0x58, 390 [BRCMNAND_ID] = 0x60, 391 [BRCMNAND_ID_EXT] = 0x64, 392 [BRCMNAND_LL_RDATA] = 0x17c, 393 [BRCMNAND_OOB_READ_BASE] = 0x20, 394 [BRCMNAND_OOB_READ_10_BASE] = 0x130, 395 [BRCMNAND_OOB_WRITE_BASE] = 0x30, 396 [BRCMNAND_OOB_WRITE_10_BASE] = 0x140, 397 [BRCMNAND_FC_BASE] = 0x200, 398 }; 399 400 /* BRCMNAND v6.0 - v7.1 */ 401 static const u16 brcmnand_regs_v60[] = { 402 [BRCMNAND_CMD_START] = 0x04, 403 [BRCMNAND_CMD_EXT_ADDRESS] = 0x08, 404 [BRCMNAND_CMD_ADDRESS] = 0x0c, 405 [BRCMNAND_INTFC_STATUS] = 0x14, 406 [BRCMNAND_CS_SELECT] = 0x18, 407 [BRCMNAND_CS_XOR] = 0x1c, 408 [BRCMNAND_LL_OP] = 0x20, 409 [BRCMNAND_CS0_BASE] = 0x50, 410 [BRCMNAND_CS1_BASE] = 0, 411 [BRCMNAND_CORR_THRESHOLD] = 0xc0, 412 [BRCMNAND_CORR_THRESHOLD_EXT] = 0xc4, 413 [BRCMNAND_UNCORR_COUNT] = 0xfc, 414 [BRCMNAND_CORR_COUNT] = 0x100, 415 [BRCMNAND_CORR_EXT_ADDR] = 0x10c, 416 [BRCMNAND_CORR_ADDR] = 0x110, 417 [BRCMNAND_UNCORR_EXT_ADDR] = 0x114, 418 [BRCMNAND_UNCORR_ADDR] = 0x118, 419 [BRCMNAND_SEMAPHORE] = 0x150, 420 [BRCMNAND_ID] = 0x194, 421 [BRCMNAND_ID_EXT] = 0x198, 422 [BRCMNAND_LL_RDATA] = 0x19c, 423 [BRCMNAND_OOB_READ_BASE] = 0x200, 424 [BRCMNAND_OOB_READ_10_BASE] = 0, 425 [BRCMNAND_OOB_WRITE_BASE] = 0x280, 426 [BRCMNAND_OOB_WRITE_10_BASE] = 0, 427 [BRCMNAND_FC_BASE] = 0x400, 428 }; 429 430 /* BRCMNAND v7.1 */ 431 static const u16 brcmnand_regs_v71[] = { 432 [BRCMNAND_CMD_START] = 0x04, 433 [BRCMNAND_CMD_EXT_ADDRESS] = 0x08, 434 [BRCMNAND_CMD_ADDRESS] = 0x0c, 435 [BRCMNAND_INTFC_STATUS] = 0x14, 436 [BRCMNAND_CS_SELECT] = 0x18, 437 [BRCMNAND_CS_XOR] = 0x1c, 438 [BRCMNAND_LL_OP] = 0x20, 439 [BRCMNAND_CS0_BASE] = 0x50, 440 [BRCMNAND_CS1_BASE] = 0, 441 [BRCMNAND_CORR_THRESHOLD] = 0xdc, 442 [BRCMNAND_CORR_THRESHOLD_EXT] = 0xe0, 443 [BRCMNAND_UNCORR_COUNT] = 0xfc, 444 [BRCMNAND_CORR_COUNT] = 0x100, 445 [BRCMNAND_CORR_EXT_ADDR] = 0x10c, 446 [BRCMNAND_CORR_ADDR] = 0x110, 447 [BRCMNAND_UNCORR_EXT_ADDR] = 0x114, 448 [BRCMNAND_UNCORR_ADDR] = 0x118, 449 [BRCMNAND_SEMAPHORE] = 0x150, 450 [BRCMNAND_ID] = 0x194, 451 [BRCMNAND_ID_EXT] = 0x198, 452 [BRCMNAND_LL_RDATA] = 0x19c, 453 [BRCMNAND_OOB_READ_BASE] = 0x200, 454 [BRCMNAND_OOB_READ_10_BASE] = 0, 455 [BRCMNAND_OOB_WRITE_BASE] = 0x280, 456 [BRCMNAND_OOB_WRITE_10_BASE] = 0, 457 [BRCMNAND_FC_BASE] = 0x400, 458 }; 459 460 /* BRCMNAND v7.2 */ 461 static const u16 brcmnand_regs_v72[] = { 462 [BRCMNAND_CMD_START] = 0x04, 463 [BRCMNAND_CMD_EXT_ADDRESS] = 0x08, 464 [BRCMNAND_CMD_ADDRESS] = 0x0c, 465 [BRCMNAND_INTFC_STATUS] = 0x14, 466 [BRCMNAND_CS_SELECT] = 0x18, 467 [BRCMNAND_CS_XOR] = 0x1c, 468 [BRCMNAND_LL_OP] = 0x20, 469 [BRCMNAND_CS0_BASE] = 0x50, 470 [BRCMNAND_CS1_BASE] = 0, 471 [BRCMNAND_CORR_THRESHOLD] = 0xdc, 472 [BRCMNAND_CORR_THRESHOLD_EXT] = 0xe0, 473 [BRCMNAND_UNCORR_COUNT] = 0xfc, 474 [BRCMNAND_CORR_COUNT] = 0x100, 475 [BRCMNAND_CORR_EXT_ADDR] = 0x10c, 476 [BRCMNAND_CORR_ADDR] = 0x110, 477 [BRCMNAND_UNCORR_EXT_ADDR] = 0x114, 478 [BRCMNAND_UNCORR_ADDR] = 0x118, 479 [BRCMNAND_SEMAPHORE] = 0x150, 480 [BRCMNAND_ID] = 0x194, 481 [BRCMNAND_ID_EXT] = 0x198, 482 [BRCMNAND_LL_RDATA] = 0x19c, 483 [BRCMNAND_OOB_READ_BASE] = 0x200, 484 [BRCMNAND_OOB_READ_10_BASE] = 0, 485 [BRCMNAND_OOB_WRITE_BASE] = 0x400, 486 [BRCMNAND_OOB_WRITE_10_BASE] = 0, 487 [BRCMNAND_FC_BASE] = 0x600, 488 }; 489 490 enum brcmnand_cs_reg { 491 BRCMNAND_CS_CFG_EXT = 0, 492 BRCMNAND_CS_CFG, 493 BRCMNAND_CS_ACC_CONTROL, 494 BRCMNAND_CS_TIMING1, 495 BRCMNAND_CS_TIMING2, 496 }; 497 498 /* Per chip-select offsets for v7.1 */ 499 static const u8 brcmnand_cs_offsets_v71[] = { 500 [BRCMNAND_CS_ACC_CONTROL] = 0x00, 501 [BRCMNAND_CS_CFG_EXT] = 0x04, 502 [BRCMNAND_CS_CFG] = 0x08, 503 [BRCMNAND_CS_TIMING1] = 0x0c, 504 [BRCMNAND_CS_TIMING2] = 0x10, 505 }; 506 507 /* Per chip-select offsets for pre v7.1, except CS0 on <= v5.0 */ 508 static const u8 brcmnand_cs_offsets[] = { 509 [BRCMNAND_CS_ACC_CONTROL] = 0x00, 510 [BRCMNAND_CS_CFG_EXT] = 0x04, 511 [BRCMNAND_CS_CFG] = 0x04, 512 [BRCMNAND_CS_TIMING1] = 0x08, 513 [BRCMNAND_CS_TIMING2] = 0x0c, 514 }; 515 516 /* Per chip-select offset for <= v5.0 on CS0 only */ 517 static const u8 brcmnand_cs_offsets_cs0[] = { 518 [BRCMNAND_CS_ACC_CONTROL] = 0x00, 519 [BRCMNAND_CS_CFG_EXT] = 0x08, 520 [BRCMNAND_CS_CFG] = 0x08, 521 [BRCMNAND_CS_TIMING1] = 0x10, 522 [BRCMNAND_CS_TIMING2] = 0x14, 523 }; 524 525 /* 526 * Bitfields for the CFG and CFG_EXT registers. Pre-v7.1 controllers only had 527 * one config register, but once the bitfields overflowed, newer controllers 528 * (v7.1 and newer) added a CFG_EXT register and shuffled a few fields around. 529 */ 530 enum { 531 CFG_BLK_ADR_BYTES_SHIFT = 8, 532 CFG_COL_ADR_BYTES_SHIFT = 12, 533 CFG_FUL_ADR_BYTES_SHIFT = 16, 534 CFG_BUS_WIDTH_SHIFT = 23, 535 CFG_BUS_WIDTH = BIT(CFG_BUS_WIDTH_SHIFT), 536 CFG_DEVICE_SIZE_SHIFT = 24, 537 538 /* Only for pre-v7.1 (with no CFG_EXT register) */ 539 CFG_PAGE_SIZE_SHIFT = 20, 540 CFG_BLK_SIZE_SHIFT = 28, 541 542 /* Only for v7.1+ (with CFG_EXT register) */ 543 CFG_EXT_PAGE_SIZE_SHIFT = 0, 544 CFG_EXT_BLK_SIZE_SHIFT = 4, 545 }; 546 547 /* BRCMNAND_INTFC_STATUS */ 548 enum { 549 INTFC_FLASH_STATUS = GENMASK(7, 0), 550 551 INTFC_ERASED = BIT(27), 552 INTFC_OOB_VALID = BIT(28), 553 INTFC_CACHE_VALID = BIT(29), 554 INTFC_FLASH_READY = BIT(30), 555 INTFC_CTLR_READY = BIT(31), 556 }; 557 558 static inline u32 nand_readreg(struct brcmnand_controller *ctrl, u32 offs) 559 { 560 return brcmnand_readl(ctrl->nand_base + offs); 561 } 562 563 static inline void nand_writereg(struct brcmnand_controller *ctrl, u32 offs, 564 u32 val) 565 { 566 brcmnand_writel(val, ctrl->nand_base + offs); 567 } 568 569 static int brcmnand_revision_init(struct brcmnand_controller *ctrl) 570 { 571 static const unsigned int block_sizes_v6[] = { 8, 16, 128, 256, 512, 1024, 2048, 0 }; 572 static const unsigned int block_sizes_v4[] = { 16, 128, 8, 512, 256, 1024, 2048, 0 }; 573 static const unsigned int page_sizes[] = { 512, 2048, 4096, 8192, 0 }; 574 575 ctrl->nand_version = nand_readreg(ctrl, 0) & 0xffff; 576 577 /* Only support v4.0+? */ 578 if (ctrl->nand_version < 0x0400) { 579 dev_err(ctrl->dev, "version %#x not supported\n", 580 ctrl->nand_version); 581 return -ENODEV; 582 } 583 584 /* Register offsets */ 585 if (ctrl->nand_version >= 0x0702) 586 ctrl->reg_offsets = brcmnand_regs_v72; 587 else if (ctrl->nand_version == 0x0701) 588 ctrl->reg_offsets = brcmnand_regs_v71; 589 else if (ctrl->nand_version >= 0x0600) 590 ctrl->reg_offsets = brcmnand_regs_v60; 591 else if (ctrl->nand_version >= 0x0500) 592 ctrl->reg_offsets = brcmnand_regs_v50; 593 else if (ctrl->nand_version >= 0x0303) 594 ctrl->reg_offsets = brcmnand_regs_v33; 595 596 /* Chip-select stride */ 597 if (ctrl->nand_version >= 0x0701) 598 ctrl->reg_spacing = 0x14; 599 else 600 ctrl->reg_spacing = 0x10; 601 602 /* Per chip-select registers */ 603 if (ctrl->nand_version >= 0x0701) { 604 ctrl->cs_offsets = brcmnand_cs_offsets_v71; 605 } else { 606 ctrl->cs_offsets = brcmnand_cs_offsets; 607 608 /* v3.3-5.0 have a different CS0 offset layout */ 609 if (ctrl->nand_version >= 0x0303 && 610 ctrl->nand_version <= 0x0500) 611 ctrl->cs0_offsets = brcmnand_cs_offsets_cs0; 612 } 613 614 /* Page / block sizes */ 615 if (ctrl->nand_version >= 0x0701) { 616 /* >= v7.1 use nice power-of-2 values! */ 617 ctrl->max_page_size = 16 * 1024; 618 ctrl->max_block_size = 2 * 1024 * 1024; 619 } else { 620 ctrl->page_sizes = page_sizes; 621 if (ctrl->nand_version >= 0x0600) 622 ctrl->block_sizes = block_sizes_v6; 623 else 624 ctrl->block_sizes = block_sizes_v4; 625 626 if (ctrl->nand_version < 0x0400) { 627 ctrl->max_page_size = 4096; 628 ctrl->max_block_size = 512 * 1024; 629 } 630 } 631 632 /* Maximum spare area sector size (per 512B) */ 633 if (ctrl->nand_version == 0x0702) 634 ctrl->max_oob = 128; 635 else if (ctrl->nand_version >= 0x0600) 636 ctrl->max_oob = 64; 637 else if (ctrl->nand_version >= 0x0500) 638 ctrl->max_oob = 32; 639 else 640 ctrl->max_oob = 16; 641 642 /* v6.0 and newer (except v6.1) have prefetch support */ 643 if (ctrl->nand_version >= 0x0600 && ctrl->nand_version != 0x0601) 644 ctrl->features |= BRCMNAND_HAS_PREFETCH; 645 646 /* 647 * v6.x has cache mode, but it's implemented differently. Ignore it for 648 * now. 649 */ 650 if (ctrl->nand_version >= 0x0700) 651 ctrl->features |= BRCMNAND_HAS_CACHE_MODE; 652 653 if (ctrl->nand_version >= 0x0500) 654 ctrl->features |= BRCMNAND_HAS_1K_SECTORS; 655 656 if (ctrl->nand_version >= 0x0700) 657 ctrl->features |= BRCMNAND_HAS_WP; 658 else if (of_property_read_bool(ctrl->dev->of_node, "brcm,nand-has-wp")) 659 ctrl->features |= BRCMNAND_HAS_WP; 660 661 return 0; 662 } 663 664 static void brcmnand_flash_dma_revision_init(struct brcmnand_controller *ctrl) 665 { 666 /* flash_dma register offsets */ 667 if (ctrl->nand_version >= 0x0703) 668 ctrl->flash_dma_offsets = flash_dma_regs_v4; 669 else if (ctrl->nand_version == 0x0602) 670 ctrl->flash_dma_offsets = flash_dma_regs_v0; 671 else 672 ctrl->flash_dma_offsets = flash_dma_regs_v1; 673 } 674 675 static inline u32 brcmnand_read_reg(struct brcmnand_controller *ctrl, 676 enum brcmnand_reg reg) 677 { 678 u16 offs = ctrl->reg_offsets[reg]; 679 680 if (offs) 681 return nand_readreg(ctrl, offs); 682 else 683 return 0; 684 } 685 686 static inline void brcmnand_write_reg(struct brcmnand_controller *ctrl, 687 enum brcmnand_reg reg, u32 val) 688 { 689 u16 offs = ctrl->reg_offsets[reg]; 690 691 if (offs) 692 nand_writereg(ctrl, offs, val); 693 } 694 695 static inline void brcmnand_rmw_reg(struct brcmnand_controller *ctrl, 696 enum brcmnand_reg reg, u32 mask, unsigned 697 int shift, u32 val) 698 { 699 u32 tmp = brcmnand_read_reg(ctrl, reg); 700 701 tmp &= ~mask; 702 tmp |= val << shift; 703 brcmnand_write_reg(ctrl, reg, tmp); 704 } 705 706 static inline u32 brcmnand_read_fc(struct brcmnand_controller *ctrl, int word) 707 { 708 return __raw_readl(ctrl->nand_fc + word * 4); 709 } 710 711 static inline void brcmnand_write_fc(struct brcmnand_controller *ctrl, 712 int word, u32 val) 713 { 714 __raw_writel(val, ctrl->nand_fc + word * 4); 715 } 716 717 static inline void edu_writel(struct brcmnand_controller *ctrl, 718 enum edu_reg reg, u32 val) 719 { 720 u16 offs = ctrl->edu_offsets[reg]; 721 722 brcmnand_writel(val, ctrl->edu_base + offs); 723 } 724 725 static inline u32 edu_readl(struct brcmnand_controller *ctrl, 726 enum edu_reg reg) 727 { 728 u16 offs = ctrl->edu_offsets[reg]; 729 730 return brcmnand_readl(ctrl->edu_base + offs); 731 } 732 733 static void brcmnand_clear_ecc_addr(struct brcmnand_controller *ctrl) 734 { 735 736 /* Clear error addresses */ 737 brcmnand_write_reg(ctrl, BRCMNAND_UNCORR_ADDR, 0); 738 brcmnand_write_reg(ctrl, BRCMNAND_CORR_ADDR, 0); 739 brcmnand_write_reg(ctrl, BRCMNAND_UNCORR_EXT_ADDR, 0); 740 brcmnand_write_reg(ctrl, BRCMNAND_CORR_EXT_ADDR, 0); 741 } 742 743 static u64 brcmnand_get_uncorrecc_addr(struct brcmnand_controller *ctrl) 744 { 745 u64 err_addr; 746 747 err_addr = brcmnand_read_reg(ctrl, BRCMNAND_UNCORR_ADDR); 748 err_addr |= ((u64)(brcmnand_read_reg(ctrl, 749 BRCMNAND_UNCORR_EXT_ADDR) 750 & 0xffff) << 32); 751 752 return err_addr; 753 } 754 755 static u64 brcmnand_get_correcc_addr(struct brcmnand_controller *ctrl) 756 { 757 u64 err_addr; 758 759 err_addr = brcmnand_read_reg(ctrl, BRCMNAND_CORR_ADDR); 760 err_addr |= ((u64)(brcmnand_read_reg(ctrl, 761 BRCMNAND_CORR_EXT_ADDR) 762 & 0xffff) << 32); 763 764 return err_addr; 765 } 766 767 static void brcmnand_set_cmd_addr(struct mtd_info *mtd, u64 addr) 768 { 769 struct nand_chip *chip = mtd_to_nand(mtd); 770 struct brcmnand_host *host = nand_get_controller_data(chip); 771 struct brcmnand_controller *ctrl = host->ctrl; 772 773 brcmnand_write_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS, 774 (host->cs << 16) | ((addr >> 32) & 0xffff)); 775 (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS); 776 brcmnand_write_reg(ctrl, BRCMNAND_CMD_ADDRESS, 777 lower_32_bits(addr)); 778 (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS); 779 } 780 781 static inline u16 brcmnand_cs_offset(struct brcmnand_controller *ctrl, int cs, 782 enum brcmnand_cs_reg reg) 783 { 784 u16 offs_cs0 = ctrl->reg_offsets[BRCMNAND_CS0_BASE]; 785 u16 offs_cs1 = ctrl->reg_offsets[BRCMNAND_CS1_BASE]; 786 u8 cs_offs; 787 788 if (cs == 0 && ctrl->cs0_offsets) 789 cs_offs = ctrl->cs0_offsets[reg]; 790 else 791 cs_offs = ctrl->cs_offsets[reg]; 792 793 if (cs && offs_cs1) 794 return offs_cs1 + (cs - 1) * ctrl->reg_spacing + cs_offs; 795 796 return offs_cs0 + cs * ctrl->reg_spacing + cs_offs; 797 } 798 799 static inline u32 brcmnand_count_corrected(struct brcmnand_controller *ctrl) 800 { 801 if (ctrl->nand_version < 0x0600) 802 return 1; 803 return brcmnand_read_reg(ctrl, BRCMNAND_CORR_COUNT); 804 } 805 806 static void brcmnand_wr_corr_thresh(struct brcmnand_host *host, u8 val) 807 { 808 struct brcmnand_controller *ctrl = host->ctrl; 809 unsigned int shift = 0, bits; 810 enum brcmnand_reg reg = BRCMNAND_CORR_THRESHOLD; 811 int cs = host->cs; 812 813 if (ctrl->nand_version == 0x0702) 814 bits = 7; 815 else if (ctrl->nand_version >= 0x0600) 816 bits = 6; 817 else if (ctrl->nand_version >= 0x0500) 818 bits = 5; 819 else 820 bits = 4; 821 822 if (ctrl->nand_version >= 0x0702) { 823 if (cs >= 4) 824 reg = BRCMNAND_CORR_THRESHOLD_EXT; 825 shift = (cs % 4) * bits; 826 } else if (ctrl->nand_version >= 0x0600) { 827 if (cs >= 5) 828 reg = BRCMNAND_CORR_THRESHOLD_EXT; 829 shift = (cs % 5) * bits; 830 } 831 brcmnand_rmw_reg(ctrl, reg, (bits - 1) << shift, shift, val); 832 } 833 834 static inline int brcmnand_cmd_shift(struct brcmnand_controller *ctrl) 835 { 836 if (ctrl->nand_version < 0x0602) 837 return 24; 838 return 0; 839 } 840 841 /*********************************************************************** 842 * NAND ACC CONTROL bitfield 843 * 844 * Some bits have remained constant throughout hardware revision, while 845 * others have shifted around. 846 ***********************************************************************/ 847 848 /* Constant for all versions (where supported) */ 849 enum { 850 /* See BRCMNAND_HAS_CACHE_MODE */ 851 ACC_CONTROL_CACHE_MODE = BIT(22), 852 853 /* See BRCMNAND_HAS_PREFETCH */ 854 ACC_CONTROL_PREFETCH = BIT(23), 855 856 ACC_CONTROL_PAGE_HIT = BIT(24), 857 ACC_CONTROL_WR_PREEMPT = BIT(25), 858 ACC_CONTROL_PARTIAL_PAGE = BIT(26), 859 ACC_CONTROL_RD_ERASED = BIT(27), 860 ACC_CONTROL_FAST_PGM_RDIN = BIT(28), 861 ACC_CONTROL_WR_ECC = BIT(30), 862 ACC_CONTROL_RD_ECC = BIT(31), 863 }; 864 865 static inline u32 brcmnand_spare_area_mask(struct brcmnand_controller *ctrl) 866 { 867 if (ctrl->nand_version == 0x0702) 868 return GENMASK(7, 0); 869 else if (ctrl->nand_version >= 0x0600) 870 return GENMASK(6, 0); 871 else 872 return GENMASK(5, 0); 873 } 874 875 #define NAND_ACC_CONTROL_ECC_SHIFT 16 876 #define NAND_ACC_CONTROL_ECC_EXT_SHIFT 13 877 878 static inline u32 brcmnand_ecc_level_mask(struct brcmnand_controller *ctrl) 879 { 880 u32 mask = (ctrl->nand_version >= 0x0600) ? 0x1f : 0x0f; 881 882 mask <<= NAND_ACC_CONTROL_ECC_SHIFT; 883 884 /* v7.2 includes additional ECC levels */ 885 if (ctrl->nand_version >= 0x0702) 886 mask |= 0x7 << NAND_ACC_CONTROL_ECC_EXT_SHIFT; 887 888 return mask; 889 } 890 891 static void brcmnand_set_ecc_enabled(struct brcmnand_host *host, int en) 892 { 893 struct brcmnand_controller *ctrl = host->ctrl; 894 u16 offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_ACC_CONTROL); 895 u32 acc_control = nand_readreg(ctrl, offs); 896 u32 ecc_flags = ACC_CONTROL_WR_ECC | ACC_CONTROL_RD_ECC; 897 898 if (en) { 899 acc_control |= ecc_flags; /* enable RD/WR ECC */ 900 acc_control |= host->hwcfg.ecc_level 901 << NAND_ACC_CONTROL_ECC_SHIFT; 902 } else { 903 acc_control &= ~ecc_flags; /* disable RD/WR ECC */ 904 acc_control &= ~brcmnand_ecc_level_mask(ctrl); 905 } 906 907 nand_writereg(ctrl, offs, acc_control); 908 } 909 910 static inline int brcmnand_sector_1k_shift(struct brcmnand_controller *ctrl) 911 { 912 if (ctrl->nand_version >= 0x0702) 913 return 9; 914 else if (ctrl->nand_version >= 0x0600) 915 return 7; 916 else if (ctrl->nand_version >= 0x0500) 917 return 6; 918 else 919 return -1; 920 } 921 922 static int brcmnand_get_sector_size_1k(struct brcmnand_host *host) 923 { 924 struct brcmnand_controller *ctrl = host->ctrl; 925 int shift = brcmnand_sector_1k_shift(ctrl); 926 u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs, 927 BRCMNAND_CS_ACC_CONTROL); 928 929 if (shift < 0) 930 return 0; 931 932 return (nand_readreg(ctrl, acc_control_offs) >> shift) & 0x1; 933 } 934 935 static void brcmnand_set_sector_size_1k(struct brcmnand_host *host, int val) 936 { 937 struct brcmnand_controller *ctrl = host->ctrl; 938 int shift = brcmnand_sector_1k_shift(ctrl); 939 u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs, 940 BRCMNAND_CS_ACC_CONTROL); 941 u32 tmp; 942 943 if (shift < 0) 944 return; 945 946 tmp = nand_readreg(ctrl, acc_control_offs); 947 tmp &= ~(1 << shift); 948 tmp |= (!!val) << shift; 949 nand_writereg(ctrl, acc_control_offs, tmp); 950 } 951 952 /*********************************************************************** 953 * CS_NAND_SELECT 954 ***********************************************************************/ 955 956 enum { 957 CS_SELECT_NAND_WP = BIT(29), 958 CS_SELECT_AUTO_DEVICE_ID_CFG = BIT(30), 959 }; 960 961 static int bcmnand_ctrl_poll_status(struct brcmnand_controller *ctrl, 962 u32 mask, u32 expected_val, 963 unsigned long timeout_ms) 964 { 965 unsigned long limit; 966 u32 val; 967 968 if (!timeout_ms) 969 timeout_ms = NAND_POLL_STATUS_TIMEOUT_MS; 970 971 limit = jiffies + msecs_to_jiffies(timeout_ms); 972 do { 973 val = brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS); 974 if ((val & mask) == expected_val) 975 return 0; 976 977 cpu_relax(); 978 } while (time_after(limit, jiffies)); 979 980 dev_warn(ctrl->dev, "timeout on status poll (expected %x got %x)\n", 981 expected_val, val & mask); 982 983 return -ETIMEDOUT; 984 } 985 986 static inline void brcmnand_set_wp(struct brcmnand_controller *ctrl, bool en) 987 { 988 u32 val = en ? CS_SELECT_NAND_WP : 0; 989 990 brcmnand_rmw_reg(ctrl, BRCMNAND_CS_SELECT, CS_SELECT_NAND_WP, 0, val); 991 } 992 993 /*********************************************************************** 994 * Flash DMA 995 ***********************************************************************/ 996 997 static inline bool has_flash_dma(struct brcmnand_controller *ctrl) 998 { 999 return ctrl->flash_dma_base; 1000 } 1001 1002 static inline bool has_edu(struct brcmnand_controller *ctrl) 1003 { 1004 return ctrl->edu_base; 1005 } 1006 1007 static inline bool use_dma(struct brcmnand_controller *ctrl) 1008 { 1009 return has_flash_dma(ctrl) || has_edu(ctrl); 1010 } 1011 1012 static inline void disable_ctrl_irqs(struct brcmnand_controller *ctrl) 1013 { 1014 if (ctrl->pio_poll_mode) 1015 return; 1016 1017 if (has_flash_dma(ctrl)) { 1018 ctrl->flash_dma_base = NULL; 1019 disable_irq(ctrl->dma_irq); 1020 } 1021 1022 disable_irq(ctrl->irq); 1023 ctrl->pio_poll_mode = true; 1024 } 1025 1026 static inline bool flash_dma_buf_ok(const void *buf) 1027 { 1028 return buf && !is_vmalloc_addr(buf) && 1029 likely(IS_ALIGNED((uintptr_t)buf, 4)); 1030 } 1031 1032 static inline void flash_dma_writel(struct brcmnand_controller *ctrl, 1033 enum flash_dma_reg dma_reg, u32 val) 1034 { 1035 u16 offs = ctrl->flash_dma_offsets[dma_reg]; 1036 1037 brcmnand_writel(val, ctrl->flash_dma_base + offs); 1038 } 1039 1040 static inline u32 flash_dma_readl(struct brcmnand_controller *ctrl, 1041 enum flash_dma_reg dma_reg) 1042 { 1043 u16 offs = ctrl->flash_dma_offsets[dma_reg]; 1044 1045 return brcmnand_readl(ctrl->flash_dma_base + offs); 1046 } 1047 1048 /* Low-level operation types: command, address, write, or read */ 1049 enum brcmnand_llop_type { 1050 LL_OP_CMD, 1051 LL_OP_ADDR, 1052 LL_OP_WR, 1053 LL_OP_RD, 1054 }; 1055 1056 /*********************************************************************** 1057 * Internal support functions 1058 ***********************************************************************/ 1059 1060 static inline bool is_hamming_ecc(struct brcmnand_controller *ctrl, 1061 struct brcmnand_cfg *cfg) 1062 { 1063 if (ctrl->nand_version <= 0x0701) 1064 return cfg->sector_size_1k == 0 && cfg->spare_area_size == 16 && 1065 cfg->ecc_level == 15; 1066 else 1067 return cfg->sector_size_1k == 0 && ((cfg->spare_area_size == 16 && 1068 cfg->ecc_level == 15) || 1069 (cfg->spare_area_size == 28 && cfg->ecc_level == 16)); 1070 } 1071 1072 /* 1073 * Set mtd->ooblayout to the appropriate mtd_ooblayout_ops given 1074 * the layout/configuration. 1075 * Returns -ERRCODE on failure. 1076 */ 1077 static int brcmnand_hamming_ooblayout_ecc(struct mtd_info *mtd, int section, 1078 struct mtd_oob_region *oobregion) 1079 { 1080 struct nand_chip *chip = mtd_to_nand(mtd); 1081 struct brcmnand_host *host = nand_get_controller_data(chip); 1082 struct brcmnand_cfg *cfg = &host->hwcfg; 1083 int sas = cfg->spare_area_size << cfg->sector_size_1k; 1084 int sectors = cfg->page_size / (512 << cfg->sector_size_1k); 1085 1086 if (section >= sectors) 1087 return -ERANGE; 1088 1089 oobregion->offset = (section * sas) + 6; 1090 oobregion->length = 3; 1091 1092 return 0; 1093 } 1094 1095 static int brcmnand_hamming_ooblayout_free(struct mtd_info *mtd, int section, 1096 struct mtd_oob_region *oobregion) 1097 { 1098 struct nand_chip *chip = mtd_to_nand(mtd); 1099 struct brcmnand_host *host = nand_get_controller_data(chip); 1100 struct brcmnand_cfg *cfg = &host->hwcfg; 1101 int sas = cfg->spare_area_size << cfg->sector_size_1k; 1102 int sectors = cfg->page_size / (512 << cfg->sector_size_1k); 1103 u32 next; 1104 1105 if (section > sectors) 1106 return -ERANGE; 1107 1108 next = (section * sas); 1109 if (section < sectors) 1110 next += 6; 1111 1112 if (section) { 1113 oobregion->offset = ((section - 1) * sas) + 9; 1114 } else { 1115 if (cfg->page_size > 512) { 1116 /* Large page NAND uses first 2 bytes for BBI */ 1117 oobregion->offset = 2; 1118 } else { 1119 /* Small page NAND uses last byte before ECC for BBI */ 1120 oobregion->offset = 0; 1121 next--; 1122 } 1123 } 1124 1125 oobregion->length = next - oobregion->offset; 1126 1127 return 0; 1128 } 1129 1130 static const struct mtd_ooblayout_ops brcmnand_hamming_ooblayout_ops = { 1131 .ecc = brcmnand_hamming_ooblayout_ecc, 1132 .free = brcmnand_hamming_ooblayout_free, 1133 }; 1134 1135 static int brcmnand_bch_ooblayout_ecc(struct mtd_info *mtd, int section, 1136 struct mtd_oob_region *oobregion) 1137 { 1138 struct nand_chip *chip = mtd_to_nand(mtd); 1139 struct brcmnand_host *host = nand_get_controller_data(chip); 1140 struct brcmnand_cfg *cfg = &host->hwcfg; 1141 int sas = cfg->spare_area_size << cfg->sector_size_1k; 1142 int sectors = cfg->page_size / (512 << cfg->sector_size_1k); 1143 1144 if (section >= sectors) 1145 return -ERANGE; 1146 1147 oobregion->offset = ((section + 1) * sas) - chip->ecc.bytes; 1148 oobregion->length = chip->ecc.bytes; 1149 1150 return 0; 1151 } 1152 1153 static int brcmnand_bch_ooblayout_free_lp(struct mtd_info *mtd, int section, 1154 struct mtd_oob_region *oobregion) 1155 { 1156 struct nand_chip *chip = mtd_to_nand(mtd); 1157 struct brcmnand_host *host = nand_get_controller_data(chip); 1158 struct brcmnand_cfg *cfg = &host->hwcfg; 1159 int sas = cfg->spare_area_size << cfg->sector_size_1k; 1160 int sectors = cfg->page_size / (512 << cfg->sector_size_1k); 1161 1162 if (section >= sectors) 1163 return -ERANGE; 1164 1165 if (sas <= chip->ecc.bytes) 1166 return 0; 1167 1168 oobregion->offset = section * sas; 1169 oobregion->length = sas - chip->ecc.bytes; 1170 1171 if (!section) { 1172 oobregion->offset++; 1173 oobregion->length--; 1174 } 1175 1176 return 0; 1177 } 1178 1179 static int brcmnand_bch_ooblayout_free_sp(struct mtd_info *mtd, int section, 1180 struct mtd_oob_region *oobregion) 1181 { 1182 struct nand_chip *chip = mtd_to_nand(mtd); 1183 struct brcmnand_host *host = nand_get_controller_data(chip); 1184 struct brcmnand_cfg *cfg = &host->hwcfg; 1185 int sas = cfg->spare_area_size << cfg->sector_size_1k; 1186 1187 if (section > 1 || sas - chip->ecc.bytes < 6 || 1188 (section && sas - chip->ecc.bytes == 6)) 1189 return -ERANGE; 1190 1191 if (!section) { 1192 oobregion->offset = 0; 1193 oobregion->length = 5; 1194 } else { 1195 oobregion->offset = 6; 1196 oobregion->length = sas - chip->ecc.bytes - 6; 1197 } 1198 1199 return 0; 1200 } 1201 1202 static const struct mtd_ooblayout_ops brcmnand_bch_lp_ooblayout_ops = { 1203 .ecc = brcmnand_bch_ooblayout_ecc, 1204 .free = brcmnand_bch_ooblayout_free_lp, 1205 }; 1206 1207 static const struct mtd_ooblayout_ops brcmnand_bch_sp_ooblayout_ops = { 1208 .ecc = brcmnand_bch_ooblayout_ecc, 1209 .free = brcmnand_bch_ooblayout_free_sp, 1210 }; 1211 1212 static int brcmstb_choose_ecc_layout(struct brcmnand_host *host) 1213 { 1214 struct brcmnand_cfg *p = &host->hwcfg; 1215 struct mtd_info *mtd = nand_to_mtd(&host->chip); 1216 struct nand_ecc_ctrl *ecc = &host->chip.ecc; 1217 unsigned int ecc_level = p->ecc_level; 1218 int sas = p->spare_area_size << p->sector_size_1k; 1219 int sectors = p->page_size / (512 << p->sector_size_1k); 1220 1221 if (p->sector_size_1k) 1222 ecc_level <<= 1; 1223 1224 if (is_hamming_ecc(host->ctrl, p)) { 1225 ecc->bytes = 3 * sectors; 1226 mtd_set_ooblayout(mtd, &brcmnand_hamming_ooblayout_ops); 1227 return 0; 1228 } 1229 1230 /* 1231 * CONTROLLER_VERSION: 1232 * < v5.0: ECC_REQ = ceil(BCH_T * 13/8) 1233 * >= v5.0: ECC_REQ = ceil(BCH_T * 14/8) 1234 * But we will just be conservative. 1235 */ 1236 ecc->bytes = DIV_ROUND_UP(ecc_level * 14, 8); 1237 if (p->page_size == 512) 1238 mtd_set_ooblayout(mtd, &brcmnand_bch_sp_ooblayout_ops); 1239 else 1240 mtd_set_ooblayout(mtd, &brcmnand_bch_lp_ooblayout_ops); 1241 1242 if (ecc->bytes >= sas) { 1243 dev_err(&host->pdev->dev, 1244 "error: ECC too large for OOB (ECC bytes %d, spare sector %d)\n", 1245 ecc->bytes, sas); 1246 return -EINVAL; 1247 } 1248 1249 return 0; 1250 } 1251 1252 static void brcmnand_wp(struct mtd_info *mtd, int wp) 1253 { 1254 struct nand_chip *chip = mtd_to_nand(mtd); 1255 struct brcmnand_host *host = nand_get_controller_data(chip); 1256 struct brcmnand_controller *ctrl = host->ctrl; 1257 1258 if ((ctrl->features & BRCMNAND_HAS_WP) && wp_on == 1) { 1259 static int old_wp = -1; 1260 int ret; 1261 1262 if (old_wp != wp) { 1263 dev_dbg(ctrl->dev, "WP %s\n", wp ? "on" : "off"); 1264 old_wp = wp; 1265 } 1266 1267 /* 1268 * make sure ctrl/flash ready before and after 1269 * changing state of #WP pin 1270 */ 1271 ret = bcmnand_ctrl_poll_status(ctrl, NAND_CTRL_RDY | 1272 NAND_STATUS_READY, 1273 NAND_CTRL_RDY | 1274 NAND_STATUS_READY, 0); 1275 if (ret) 1276 return; 1277 1278 brcmnand_set_wp(ctrl, wp); 1279 nand_status_op(chip, NULL); 1280 /* NAND_STATUS_WP 0x00 = protected, 0x80 = not protected */ 1281 ret = bcmnand_ctrl_poll_status(ctrl, 1282 NAND_CTRL_RDY | 1283 NAND_STATUS_READY | 1284 NAND_STATUS_WP, 1285 NAND_CTRL_RDY | 1286 NAND_STATUS_READY | 1287 (wp ? 0 : NAND_STATUS_WP), 0); 1288 1289 if (ret) 1290 dev_err_ratelimited(&host->pdev->dev, 1291 "nand #WP expected %s\n", 1292 wp ? "on" : "off"); 1293 } 1294 } 1295 1296 /* Helper functions for reading and writing OOB registers */ 1297 static inline u8 oob_reg_read(struct brcmnand_controller *ctrl, u32 offs) 1298 { 1299 u16 offset0, offset10, reg_offs; 1300 1301 offset0 = ctrl->reg_offsets[BRCMNAND_OOB_READ_BASE]; 1302 offset10 = ctrl->reg_offsets[BRCMNAND_OOB_READ_10_BASE]; 1303 1304 if (offs >= ctrl->max_oob) 1305 return 0x77; 1306 1307 if (offs >= 16 && offset10) 1308 reg_offs = offset10 + ((offs - 0x10) & ~0x03); 1309 else 1310 reg_offs = offset0 + (offs & ~0x03); 1311 1312 return nand_readreg(ctrl, reg_offs) >> (24 - ((offs & 0x03) << 3)); 1313 } 1314 1315 static inline void oob_reg_write(struct brcmnand_controller *ctrl, u32 offs, 1316 u32 data) 1317 { 1318 u16 offset0, offset10, reg_offs; 1319 1320 offset0 = ctrl->reg_offsets[BRCMNAND_OOB_WRITE_BASE]; 1321 offset10 = ctrl->reg_offsets[BRCMNAND_OOB_WRITE_10_BASE]; 1322 1323 if (offs >= ctrl->max_oob) 1324 return; 1325 1326 if (offs >= 16 && offset10) 1327 reg_offs = offset10 + ((offs - 0x10) & ~0x03); 1328 else 1329 reg_offs = offset0 + (offs & ~0x03); 1330 1331 nand_writereg(ctrl, reg_offs, data); 1332 } 1333 1334 /* 1335 * read_oob_from_regs - read data from OOB registers 1336 * @ctrl: NAND controller 1337 * @i: sub-page sector index 1338 * @oob: buffer to read to 1339 * @sas: spare area sector size (i.e., OOB size per FLASH_CACHE) 1340 * @sector_1k: 1 for 1KiB sectors, 0 for 512B, other values are illegal 1341 */ 1342 static int read_oob_from_regs(struct brcmnand_controller *ctrl, int i, u8 *oob, 1343 int sas, int sector_1k) 1344 { 1345 int tbytes = sas << sector_1k; 1346 int j; 1347 1348 /* Adjust OOB values for 1K sector size */ 1349 if (sector_1k && (i & 0x01)) 1350 tbytes = max(0, tbytes - (int)ctrl->max_oob); 1351 tbytes = min_t(int, tbytes, ctrl->max_oob); 1352 1353 for (j = 0; j < tbytes; j++) 1354 oob[j] = oob_reg_read(ctrl, j); 1355 return tbytes; 1356 } 1357 1358 /* 1359 * write_oob_to_regs - write data to OOB registers 1360 * @i: sub-page sector index 1361 * @oob: buffer to write from 1362 * @sas: spare area sector size (i.e., OOB size per FLASH_CACHE) 1363 * @sector_1k: 1 for 1KiB sectors, 0 for 512B, other values are illegal 1364 */ 1365 static int write_oob_to_regs(struct brcmnand_controller *ctrl, int i, 1366 const u8 *oob, int sas, int sector_1k) 1367 { 1368 int tbytes = sas << sector_1k; 1369 int j; 1370 1371 /* Adjust OOB values for 1K sector size */ 1372 if (sector_1k && (i & 0x01)) 1373 tbytes = max(0, tbytes - (int)ctrl->max_oob); 1374 tbytes = min_t(int, tbytes, ctrl->max_oob); 1375 1376 for (j = 0; j < tbytes; j += 4) 1377 oob_reg_write(ctrl, j, 1378 (oob[j + 0] << 24) | 1379 (oob[j + 1] << 16) | 1380 (oob[j + 2] << 8) | 1381 (oob[j + 3] << 0)); 1382 return tbytes; 1383 } 1384 1385 static void brcmnand_edu_init(struct brcmnand_controller *ctrl) 1386 { 1387 /* initialize edu */ 1388 edu_writel(ctrl, EDU_ERR_STATUS, 0); 1389 edu_readl(ctrl, EDU_ERR_STATUS); 1390 edu_writel(ctrl, EDU_DONE, 0); 1391 edu_writel(ctrl, EDU_DONE, 0); 1392 edu_writel(ctrl, EDU_DONE, 0); 1393 edu_writel(ctrl, EDU_DONE, 0); 1394 edu_readl(ctrl, EDU_DONE); 1395 } 1396 1397 /* edu irq */ 1398 static irqreturn_t brcmnand_edu_irq(int irq, void *data) 1399 { 1400 struct brcmnand_controller *ctrl = data; 1401 1402 if (ctrl->edu_count) { 1403 ctrl->edu_count--; 1404 while (!(edu_readl(ctrl, EDU_DONE) & EDU_DONE_MASK)) 1405 udelay(1); 1406 edu_writel(ctrl, EDU_DONE, 0); 1407 edu_readl(ctrl, EDU_DONE); 1408 } 1409 1410 if (ctrl->edu_count) { 1411 ctrl->edu_dram_addr += FC_BYTES; 1412 ctrl->edu_ext_addr += FC_BYTES; 1413 1414 edu_writel(ctrl, EDU_DRAM_ADDR, (u32)ctrl->edu_dram_addr); 1415 edu_readl(ctrl, EDU_DRAM_ADDR); 1416 edu_writel(ctrl, EDU_EXT_ADDR, ctrl->edu_ext_addr); 1417 edu_readl(ctrl, EDU_EXT_ADDR); 1418 1419 mb(); /* flush previous writes */ 1420 edu_writel(ctrl, EDU_CMD, ctrl->edu_cmd); 1421 edu_readl(ctrl, EDU_CMD); 1422 1423 return IRQ_HANDLED; 1424 } 1425 1426 complete(&ctrl->edu_done); 1427 1428 return IRQ_HANDLED; 1429 } 1430 1431 static irqreturn_t brcmnand_ctlrdy_irq(int irq, void *data) 1432 { 1433 struct brcmnand_controller *ctrl = data; 1434 1435 /* Discard all NAND_CTLRDY interrupts during DMA */ 1436 if (ctrl->dma_pending) 1437 return IRQ_HANDLED; 1438 1439 /* check if you need to piggy back on the ctrlrdy irq */ 1440 if (ctrl->edu_pending) { 1441 if (irq == ctrl->irq && ((int)ctrl->edu_irq >= 0)) 1442 /* Discard interrupts while using dedicated edu irq */ 1443 return IRQ_HANDLED; 1444 1445 /* no registered edu irq, call handler */ 1446 return brcmnand_edu_irq(irq, data); 1447 } 1448 1449 complete(&ctrl->done); 1450 return IRQ_HANDLED; 1451 } 1452 1453 /* Handle SoC-specific interrupt hardware */ 1454 static irqreturn_t brcmnand_irq(int irq, void *data) 1455 { 1456 struct brcmnand_controller *ctrl = data; 1457 1458 if (ctrl->soc->ctlrdy_ack(ctrl->soc)) 1459 return brcmnand_ctlrdy_irq(irq, data); 1460 1461 return IRQ_NONE; 1462 } 1463 1464 static irqreturn_t brcmnand_dma_irq(int irq, void *data) 1465 { 1466 struct brcmnand_controller *ctrl = data; 1467 1468 complete(&ctrl->dma_done); 1469 1470 return IRQ_HANDLED; 1471 } 1472 1473 static void brcmnand_send_cmd(struct brcmnand_host *host, int cmd) 1474 { 1475 struct brcmnand_controller *ctrl = host->ctrl; 1476 int ret; 1477 u64 cmd_addr; 1478 1479 cmd_addr = brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS); 1480 1481 dev_dbg(ctrl->dev, "send native cmd %d addr 0x%llx\n", cmd, cmd_addr); 1482 1483 BUG_ON(ctrl->cmd_pending != 0); 1484 ctrl->cmd_pending = cmd; 1485 1486 ret = bcmnand_ctrl_poll_status(ctrl, NAND_CTRL_RDY, NAND_CTRL_RDY, 0); 1487 WARN_ON(ret); 1488 1489 mb(); /* flush previous writes */ 1490 brcmnand_write_reg(ctrl, BRCMNAND_CMD_START, 1491 cmd << brcmnand_cmd_shift(ctrl)); 1492 } 1493 1494 /*********************************************************************** 1495 * NAND MTD API: read/program/erase 1496 ***********************************************************************/ 1497 1498 static void brcmnand_cmd_ctrl(struct nand_chip *chip, int dat, 1499 unsigned int ctrl) 1500 { 1501 /* intentionally left blank */ 1502 } 1503 1504 static bool brcmstb_nand_wait_for_completion(struct nand_chip *chip) 1505 { 1506 struct brcmnand_host *host = nand_get_controller_data(chip); 1507 struct brcmnand_controller *ctrl = host->ctrl; 1508 struct mtd_info *mtd = nand_to_mtd(chip); 1509 bool err = false; 1510 int sts; 1511 1512 if (mtd->oops_panic_write) { 1513 /* switch to interrupt polling and PIO mode */ 1514 disable_ctrl_irqs(ctrl); 1515 sts = bcmnand_ctrl_poll_status(ctrl, NAND_CTRL_RDY, 1516 NAND_CTRL_RDY, 0); 1517 err = (sts < 0) ? true : false; 1518 } else { 1519 unsigned long timeo = msecs_to_jiffies( 1520 NAND_POLL_STATUS_TIMEOUT_MS); 1521 /* wait for completion interrupt */ 1522 sts = wait_for_completion_timeout(&ctrl->done, timeo); 1523 err = (sts <= 0) ? true : false; 1524 } 1525 1526 return err; 1527 } 1528 1529 static int brcmnand_waitfunc(struct nand_chip *chip) 1530 { 1531 struct brcmnand_host *host = nand_get_controller_data(chip); 1532 struct brcmnand_controller *ctrl = host->ctrl; 1533 bool err = false; 1534 1535 dev_dbg(ctrl->dev, "wait on native cmd %d\n", ctrl->cmd_pending); 1536 if (ctrl->cmd_pending) 1537 err = brcmstb_nand_wait_for_completion(chip); 1538 1539 if (err) { 1540 u32 cmd = brcmnand_read_reg(ctrl, BRCMNAND_CMD_START) 1541 >> brcmnand_cmd_shift(ctrl); 1542 1543 dev_err_ratelimited(ctrl->dev, 1544 "timeout waiting for command %#02x\n", cmd); 1545 dev_err_ratelimited(ctrl->dev, "intfc status %08x\n", 1546 brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS)); 1547 } 1548 ctrl->cmd_pending = 0; 1549 return brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS) & 1550 INTFC_FLASH_STATUS; 1551 } 1552 1553 enum { 1554 LLOP_RE = BIT(16), 1555 LLOP_WE = BIT(17), 1556 LLOP_ALE = BIT(18), 1557 LLOP_CLE = BIT(19), 1558 LLOP_RETURN_IDLE = BIT(31), 1559 1560 LLOP_DATA_MASK = GENMASK(15, 0), 1561 }; 1562 1563 static int brcmnand_low_level_op(struct brcmnand_host *host, 1564 enum brcmnand_llop_type type, u32 data, 1565 bool last_op) 1566 { 1567 struct nand_chip *chip = &host->chip; 1568 struct brcmnand_controller *ctrl = host->ctrl; 1569 u32 tmp; 1570 1571 tmp = data & LLOP_DATA_MASK; 1572 switch (type) { 1573 case LL_OP_CMD: 1574 tmp |= LLOP_WE | LLOP_CLE; 1575 break; 1576 case LL_OP_ADDR: 1577 /* WE | ALE */ 1578 tmp |= LLOP_WE | LLOP_ALE; 1579 break; 1580 case LL_OP_WR: 1581 /* WE */ 1582 tmp |= LLOP_WE; 1583 break; 1584 case LL_OP_RD: 1585 /* RE */ 1586 tmp |= LLOP_RE; 1587 break; 1588 } 1589 if (last_op) 1590 /* RETURN_IDLE */ 1591 tmp |= LLOP_RETURN_IDLE; 1592 1593 dev_dbg(ctrl->dev, "ll_op cmd %#x\n", tmp); 1594 1595 brcmnand_write_reg(ctrl, BRCMNAND_LL_OP, tmp); 1596 (void)brcmnand_read_reg(ctrl, BRCMNAND_LL_OP); 1597 1598 brcmnand_send_cmd(host, CMD_LOW_LEVEL_OP); 1599 return brcmnand_waitfunc(chip); 1600 } 1601 1602 static void brcmnand_cmdfunc(struct nand_chip *chip, unsigned command, 1603 int column, int page_addr) 1604 { 1605 struct mtd_info *mtd = nand_to_mtd(chip); 1606 struct brcmnand_host *host = nand_get_controller_data(chip); 1607 struct brcmnand_controller *ctrl = host->ctrl; 1608 u64 addr = (u64)page_addr << chip->page_shift; 1609 int native_cmd = 0; 1610 1611 if (command == NAND_CMD_READID || command == NAND_CMD_PARAM || 1612 command == NAND_CMD_RNDOUT) 1613 addr = (u64)column; 1614 /* Avoid propagating a negative, don't-care address */ 1615 else if (page_addr < 0) 1616 addr = 0; 1617 1618 dev_dbg(ctrl->dev, "cmd 0x%x addr 0x%llx\n", command, 1619 (unsigned long long)addr); 1620 1621 host->last_cmd = command; 1622 host->last_byte = 0; 1623 host->last_addr = addr; 1624 1625 switch (command) { 1626 case NAND_CMD_RESET: 1627 native_cmd = CMD_FLASH_RESET; 1628 break; 1629 case NAND_CMD_STATUS: 1630 native_cmd = CMD_STATUS_READ; 1631 break; 1632 case NAND_CMD_READID: 1633 native_cmd = CMD_DEVICE_ID_READ; 1634 break; 1635 case NAND_CMD_READOOB: 1636 native_cmd = CMD_SPARE_AREA_READ; 1637 break; 1638 case NAND_CMD_ERASE1: 1639 native_cmd = CMD_BLOCK_ERASE; 1640 brcmnand_wp(mtd, 0); 1641 break; 1642 case NAND_CMD_PARAM: 1643 native_cmd = CMD_PARAMETER_READ; 1644 break; 1645 case NAND_CMD_SET_FEATURES: 1646 case NAND_CMD_GET_FEATURES: 1647 brcmnand_low_level_op(host, LL_OP_CMD, command, false); 1648 brcmnand_low_level_op(host, LL_OP_ADDR, column, false); 1649 break; 1650 case NAND_CMD_RNDOUT: 1651 native_cmd = CMD_PARAMETER_CHANGE_COL; 1652 addr &= ~((u64)(FC_BYTES - 1)); 1653 /* 1654 * HW quirk: PARAMETER_CHANGE_COL requires SECTOR_SIZE_1K=0 1655 * NB: hwcfg.sector_size_1k may not be initialized yet 1656 */ 1657 if (brcmnand_get_sector_size_1k(host)) { 1658 host->hwcfg.sector_size_1k = 1659 brcmnand_get_sector_size_1k(host); 1660 brcmnand_set_sector_size_1k(host, 0); 1661 } 1662 break; 1663 } 1664 1665 if (!native_cmd) 1666 return; 1667 1668 brcmnand_set_cmd_addr(mtd, addr); 1669 brcmnand_send_cmd(host, native_cmd); 1670 brcmnand_waitfunc(chip); 1671 1672 if (native_cmd == CMD_PARAMETER_READ || 1673 native_cmd == CMD_PARAMETER_CHANGE_COL) { 1674 /* Copy flash cache word-wise */ 1675 u32 *flash_cache = (u32 *)ctrl->flash_cache; 1676 int i; 1677 1678 brcmnand_soc_data_bus_prepare(ctrl->soc, true); 1679 1680 /* 1681 * Must cache the FLASH_CACHE now, since changes in 1682 * SECTOR_SIZE_1K may invalidate it 1683 */ 1684 for (i = 0; i < FC_WORDS; i++) 1685 /* 1686 * Flash cache is big endian for parameter pages, at 1687 * least on STB SoCs 1688 */ 1689 flash_cache[i] = be32_to_cpu(brcmnand_read_fc(ctrl, i)); 1690 1691 brcmnand_soc_data_bus_unprepare(ctrl->soc, true); 1692 1693 /* Cleanup from HW quirk: restore SECTOR_SIZE_1K */ 1694 if (host->hwcfg.sector_size_1k) 1695 brcmnand_set_sector_size_1k(host, 1696 host->hwcfg.sector_size_1k); 1697 } 1698 1699 /* Re-enable protection is necessary only after erase */ 1700 if (command == NAND_CMD_ERASE1) 1701 brcmnand_wp(mtd, 1); 1702 } 1703 1704 static uint8_t brcmnand_read_byte(struct nand_chip *chip) 1705 { 1706 struct brcmnand_host *host = nand_get_controller_data(chip); 1707 struct brcmnand_controller *ctrl = host->ctrl; 1708 uint8_t ret = 0; 1709 int addr, offs; 1710 1711 switch (host->last_cmd) { 1712 case NAND_CMD_READID: 1713 if (host->last_byte < 4) 1714 ret = brcmnand_read_reg(ctrl, BRCMNAND_ID) >> 1715 (24 - (host->last_byte << 3)); 1716 else if (host->last_byte < 8) 1717 ret = brcmnand_read_reg(ctrl, BRCMNAND_ID_EXT) >> 1718 (56 - (host->last_byte << 3)); 1719 break; 1720 1721 case NAND_CMD_READOOB: 1722 ret = oob_reg_read(ctrl, host->last_byte); 1723 break; 1724 1725 case NAND_CMD_STATUS: 1726 ret = brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS) & 1727 INTFC_FLASH_STATUS; 1728 if (wp_on) /* hide WP status */ 1729 ret |= NAND_STATUS_WP; 1730 break; 1731 1732 case NAND_CMD_PARAM: 1733 case NAND_CMD_RNDOUT: 1734 addr = host->last_addr + host->last_byte; 1735 offs = addr & (FC_BYTES - 1); 1736 1737 /* At FC_BYTES boundary, switch to next column */ 1738 if (host->last_byte > 0 && offs == 0) 1739 nand_change_read_column_op(chip, addr, NULL, 0, false); 1740 1741 ret = ctrl->flash_cache[offs]; 1742 break; 1743 case NAND_CMD_GET_FEATURES: 1744 if (host->last_byte >= ONFI_SUBFEATURE_PARAM_LEN) { 1745 ret = 0; 1746 } else { 1747 bool last = host->last_byte == 1748 ONFI_SUBFEATURE_PARAM_LEN - 1; 1749 brcmnand_low_level_op(host, LL_OP_RD, 0, last); 1750 ret = brcmnand_read_reg(ctrl, BRCMNAND_LL_RDATA) & 0xff; 1751 } 1752 } 1753 1754 dev_dbg(ctrl->dev, "read byte = 0x%02x\n", ret); 1755 host->last_byte++; 1756 1757 return ret; 1758 } 1759 1760 static void brcmnand_read_buf(struct nand_chip *chip, uint8_t *buf, int len) 1761 { 1762 int i; 1763 1764 for (i = 0; i < len; i++, buf++) 1765 *buf = brcmnand_read_byte(chip); 1766 } 1767 1768 static void brcmnand_write_buf(struct nand_chip *chip, const uint8_t *buf, 1769 int len) 1770 { 1771 int i; 1772 struct brcmnand_host *host = nand_get_controller_data(chip); 1773 1774 switch (host->last_cmd) { 1775 case NAND_CMD_SET_FEATURES: 1776 for (i = 0; i < len; i++) 1777 brcmnand_low_level_op(host, LL_OP_WR, buf[i], 1778 (i + 1) == len); 1779 break; 1780 default: 1781 BUG(); 1782 break; 1783 } 1784 } 1785 1786 /** 1787 * Kick EDU engine 1788 */ 1789 static int brcmnand_edu_trans(struct brcmnand_host *host, u64 addr, u32 *buf, 1790 u32 len, u8 cmd) 1791 { 1792 struct brcmnand_controller *ctrl = host->ctrl; 1793 unsigned long timeo = msecs_to_jiffies(200); 1794 int ret = 0; 1795 int dir = (cmd == CMD_PAGE_READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE); 1796 u8 edu_cmd = (cmd == CMD_PAGE_READ ? EDU_CMD_READ : EDU_CMD_WRITE); 1797 unsigned int trans = len >> FC_SHIFT; 1798 dma_addr_t pa; 1799 1800 pa = dma_map_single(ctrl->dev, buf, len, dir); 1801 if (dma_mapping_error(ctrl->dev, pa)) { 1802 dev_err(ctrl->dev, "unable to map buffer for EDU DMA\n"); 1803 return -ENOMEM; 1804 } 1805 1806 ctrl->edu_pending = true; 1807 ctrl->edu_dram_addr = pa; 1808 ctrl->edu_ext_addr = addr; 1809 ctrl->edu_cmd = edu_cmd; 1810 ctrl->edu_count = trans; 1811 1812 edu_writel(ctrl, EDU_DRAM_ADDR, (u32)ctrl->edu_dram_addr); 1813 edu_readl(ctrl, EDU_DRAM_ADDR); 1814 edu_writel(ctrl, EDU_EXT_ADDR, ctrl->edu_ext_addr); 1815 edu_readl(ctrl, EDU_EXT_ADDR); 1816 edu_writel(ctrl, EDU_LENGTH, FC_BYTES); 1817 edu_readl(ctrl, EDU_LENGTH); 1818 1819 /* Start edu engine */ 1820 mb(); /* flush previous writes */ 1821 edu_writel(ctrl, EDU_CMD, ctrl->edu_cmd); 1822 edu_readl(ctrl, EDU_CMD); 1823 1824 if (wait_for_completion_timeout(&ctrl->edu_done, timeo) <= 0) { 1825 dev_err(ctrl->dev, 1826 "timeout waiting for EDU; status %#x, error status %#x\n", 1827 edu_readl(ctrl, EDU_STATUS), 1828 edu_readl(ctrl, EDU_ERR_STATUS)); 1829 } 1830 1831 dma_unmap_single(ctrl->dev, pa, len, dir); 1832 1833 /* for program page check NAND status */ 1834 if (((brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS) & 1835 INTFC_FLASH_STATUS) & NAND_STATUS_FAIL) && 1836 edu_cmd == EDU_CMD_WRITE) { 1837 dev_info(ctrl->dev, "program failed at %llx\n", 1838 (unsigned long long)addr); 1839 ret = -EIO; 1840 } 1841 1842 /* Make sure the EDU status is clean */ 1843 if (edu_readl(ctrl, EDU_STATUS) & EDU_STATUS_ACTIVE) 1844 dev_warn(ctrl->dev, "EDU still active: %#x\n", 1845 edu_readl(ctrl, EDU_STATUS)); 1846 1847 if (unlikely(edu_readl(ctrl, EDU_ERR_STATUS) & EDU_ERR_STATUS_ERRACK)) { 1848 dev_warn(ctrl->dev, "EDU RBUS error at addr %llx\n", 1849 (unsigned long long)addr); 1850 ret = -EIO; 1851 } 1852 1853 ctrl->edu_pending = false; 1854 brcmnand_edu_init(ctrl); 1855 edu_writel(ctrl, EDU_STOP, 0); /* force stop */ 1856 edu_readl(ctrl, EDU_STOP); 1857 1858 return ret; 1859 } 1860 1861 /** 1862 * Construct a FLASH_DMA descriptor as part of a linked list. You must know the 1863 * following ahead of time: 1864 * - Is this descriptor the beginning or end of a linked list? 1865 * - What is the (DMA) address of the next descriptor in the linked list? 1866 */ 1867 static int brcmnand_fill_dma_desc(struct brcmnand_host *host, 1868 struct brcm_nand_dma_desc *desc, u64 addr, 1869 dma_addr_t buf, u32 len, u8 dma_cmd, 1870 bool begin, bool end, 1871 dma_addr_t next_desc) 1872 { 1873 memset(desc, 0, sizeof(*desc)); 1874 /* Descriptors are written in native byte order (wordwise) */ 1875 desc->next_desc = lower_32_bits(next_desc); 1876 desc->next_desc_ext = upper_32_bits(next_desc); 1877 desc->cmd_irq = (dma_cmd << 24) | 1878 (end ? (0x03 << 8) : 0) | /* IRQ | STOP */ 1879 (!!begin) | ((!!end) << 1); /* head, tail */ 1880 #ifdef CONFIG_CPU_BIG_ENDIAN 1881 desc->cmd_irq |= 0x01 << 12; 1882 #endif 1883 desc->dram_addr = lower_32_bits(buf); 1884 desc->dram_addr_ext = upper_32_bits(buf); 1885 desc->tfr_len = len; 1886 desc->total_len = len; 1887 desc->flash_addr = lower_32_bits(addr); 1888 desc->flash_addr_ext = upper_32_bits(addr); 1889 desc->cs = host->cs; 1890 desc->status_valid = 0x01; 1891 return 0; 1892 } 1893 1894 /** 1895 * Kick the FLASH_DMA engine, with a given DMA descriptor 1896 */ 1897 static void brcmnand_dma_run(struct brcmnand_host *host, dma_addr_t desc) 1898 { 1899 struct brcmnand_controller *ctrl = host->ctrl; 1900 unsigned long timeo = msecs_to_jiffies(100); 1901 1902 flash_dma_writel(ctrl, FLASH_DMA_FIRST_DESC, lower_32_bits(desc)); 1903 (void)flash_dma_readl(ctrl, FLASH_DMA_FIRST_DESC); 1904 if (ctrl->nand_version > 0x0602) { 1905 flash_dma_writel(ctrl, FLASH_DMA_FIRST_DESC_EXT, 1906 upper_32_bits(desc)); 1907 (void)flash_dma_readl(ctrl, FLASH_DMA_FIRST_DESC_EXT); 1908 } 1909 1910 /* Start FLASH_DMA engine */ 1911 ctrl->dma_pending = true; 1912 mb(); /* flush previous writes */ 1913 flash_dma_writel(ctrl, FLASH_DMA_CTRL, 0x03); /* wake | run */ 1914 1915 if (wait_for_completion_timeout(&ctrl->dma_done, timeo) <= 0) { 1916 dev_err(ctrl->dev, 1917 "timeout waiting for DMA; status %#x, error status %#x\n", 1918 flash_dma_readl(ctrl, FLASH_DMA_STATUS), 1919 flash_dma_readl(ctrl, FLASH_DMA_ERROR_STATUS)); 1920 } 1921 ctrl->dma_pending = false; 1922 flash_dma_writel(ctrl, FLASH_DMA_CTRL, 0); /* force stop */ 1923 } 1924 1925 static int brcmnand_dma_trans(struct brcmnand_host *host, u64 addr, u32 *buf, 1926 u32 len, u8 dma_cmd) 1927 { 1928 struct brcmnand_controller *ctrl = host->ctrl; 1929 dma_addr_t buf_pa; 1930 int dir = dma_cmd == CMD_PAGE_READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE; 1931 1932 buf_pa = dma_map_single(ctrl->dev, buf, len, dir); 1933 if (dma_mapping_error(ctrl->dev, buf_pa)) { 1934 dev_err(ctrl->dev, "unable to map buffer for DMA\n"); 1935 return -ENOMEM; 1936 } 1937 1938 brcmnand_fill_dma_desc(host, ctrl->dma_desc, addr, buf_pa, len, 1939 dma_cmd, true, true, 0); 1940 1941 brcmnand_dma_run(host, ctrl->dma_pa); 1942 1943 dma_unmap_single(ctrl->dev, buf_pa, len, dir); 1944 1945 if (ctrl->dma_desc->status_valid & FLASH_DMA_ECC_ERROR) 1946 return -EBADMSG; 1947 else if (ctrl->dma_desc->status_valid & FLASH_DMA_CORR_ERROR) 1948 return -EUCLEAN; 1949 1950 return 0; 1951 } 1952 1953 /* 1954 * Assumes proper CS is already set 1955 */ 1956 static int brcmnand_read_by_pio(struct mtd_info *mtd, struct nand_chip *chip, 1957 u64 addr, unsigned int trans, u32 *buf, 1958 u8 *oob, u64 *err_addr) 1959 { 1960 struct brcmnand_host *host = nand_get_controller_data(chip); 1961 struct brcmnand_controller *ctrl = host->ctrl; 1962 int i, j, ret = 0; 1963 1964 brcmnand_clear_ecc_addr(ctrl); 1965 1966 for (i = 0; i < trans; i++, addr += FC_BYTES) { 1967 brcmnand_set_cmd_addr(mtd, addr); 1968 /* SPARE_AREA_READ does not use ECC, so just use PAGE_READ */ 1969 brcmnand_send_cmd(host, CMD_PAGE_READ); 1970 brcmnand_waitfunc(chip); 1971 1972 if (likely(buf)) { 1973 brcmnand_soc_data_bus_prepare(ctrl->soc, false); 1974 1975 for (j = 0; j < FC_WORDS; j++, buf++) 1976 *buf = brcmnand_read_fc(ctrl, j); 1977 1978 brcmnand_soc_data_bus_unprepare(ctrl->soc, false); 1979 } 1980 1981 if (oob) 1982 oob += read_oob_from_regs(ctrl, i, oob, 1983 mtd->oobsize / trans, 1984 host->hwcfg.sector_size_1k); 1985 1986 if (!ret) { 1987 *err_addr = brcmnand_get_uncorrecc_addr(ctrl); 1988 1989 if (*err_addr) 1990 ret = -EBADMSG; 1991 } 1992 1993 if (!ret) { 1994 *err_addr = brcmnand_get_correcc_addr(ctrl); 1995 1996 if (*err_addr) 1997 ret = -EUCLEAN; 1998 } 1999 } 2000 2001 return ret; 2002 } 2003 2004 /* 2005 * Check a page to see if it is erased (w/ bitflips) after an uncorrectable ECC 2006 * error 2007 * 2008 * Because the HW ECC signals an ECC error if an erase paged has even a single 2009 * bitflip, we must check each ECC error to see if it is actually an erased 2010 * page with bitflips, not a truly corrupted page. 2011 * 2012 * On a real error, return a negative error code (-EBADMSG for ECC error), and 2013 * buf will contain raw data. 2014 * Otherwise, buf gets filled with 0xffs and return the maximum number of 2015 * bitflips-per-ECC-sector to the caller. 2016 * 2017 */ 2018 static int brcmstb_nand_verify_erased_page(struct mtd_info *mtd, 2019 struct nand_chip *chip, void *buf, u64 addr) 2020 { 2021 struct mtd_oob_region ecc; 2022 int i; 2023 int bitflips = 0; 2024 int page = addr >> chip->page_shift; 2025 int ret; 2026 void *ecc_bytes; 2027 void *ecc_chunk; 2028 2029 if (!buf) 2030 buf = nand_get_data_buf(chip); 2031 2032 /* read without ecc for verification */ 2033 ret = chip->ecc.read_page_raw(chip, buf, true, page); 2034 if (ret) 2035 return ret; 2036 2037 for (i = 0; i < chip->ecc.steps; i++) { 2038 ecc_chunk = buf + chip->ecc.size * i; 2039 2040 mtd_ooblayout_ecc(mtd, i, &ecc); 2041 ecc_bytes = chip->oob_poi + ecc.offset; 2042 2043 ret = nand_check_erased_ecc_chunk(ecc_chunk, chip->ecc.size, 2044 ecc_bytes, ecc.length, 2045 NULL, 0, 2046 chip->ecc.strength); 2047 if (ret < 0) 2048 return ret; 2049 2050 bitflips = max(bitflips, ret); 2051 } 2052 2053 return bitflips; 2054 } 2055 2056 static int brcmnand_read(struct mtd_info *mtd, struct nand_chip *chip, 2057 u64 addr, unsigned int trans, u32 *buf, u8 *oob) 2058 { 2059 struct brcmnand_host *host = nand_get_controller_data(chip); 2060 struct brcmnand_controller *ctrl = host->ctrl; 2061 u64 err_addr = 0; 2062 int err; 2063 bool retry = true; 2064 2065 dev_dbg(ctrl->dev, "read %llx -> %p\n", (unsigned long long)addr, buf); 2066 2067 try_dmaread: 2068 brcmnand_clear_ecc_addr(ctrl); 2069 2070 if (ctrl->dma_trans && !oob && flash_dma_buf_ok(buf)) { 2071 err = ctrl->dma_trans(host, addr, buf, 2072 trans * FC_BYTES, 2073 CMD_PAGE_READ); 2074 2075 if (err) { 2076 if (mtd_is_bitflip_or_eccerr(err)) 2077 err_addr = addr; 2078 else 2079 return -EIO; 2080 } 2081 } else { 2082 if (oob) 2083 memset(oob, 0x99, mtd->oobsize); 2084 2085 err = brcmnand_read_by_pio(mtd, chip, addr, trans, buf, 2086 oob, &err_addr); 2087 } 2088 2089 if (mtd_is_eccerr(err)) { 2090 /* 2091 * On controller version and 7.0, 7.1 , DMA read after a 2092 * prior PIO read that reported uncorrectable error, 2093 * the DMA engine captures this error following DMA read 2094 * cleared only on subsequent DMA read, so just retry once 2095 * to clear a possible false error reported for current DMA 2096 * read 2097 */ 2098 if ((ctrl->nand_version == 0x0700) || 2099 (ctrl->nand_version == 0x0701)) { 2100 if (retry) { 2101 retry = false; 2102 goto try_dmaread; 2103 } 2104 } 2105 2106 /* 2107 * Controller version 7.2 has hw encoder to detect erased page 2108 * bitflips, apply sw verification for older controllers only 2109 */ 2110 if (ctrl->nand_version < 0x0702) { 2111 err = brcmstb_nand_verify_erased_page(mtd, chip, buf, 2112 addr); 2113 /* erased page bitflips corrected */ 2114 if (err >= 0) 2115 return err; 2116 } 2117 2118 dev_dbg(ctrl->dev, "uncorrectable error at 0x%llx\n", 2119 (unsigned long long)err_addr); 2120 mtd->ecc_stats.failed++; 2121 /* NAND layer expects zero on ECC errors */ 2122 return 0; 2123 } 2124 2125 if (mtd_is_bitflip(err)) { 2126 unsigned int corrected = brcmnand_count_corrected(ctrl); 2127 2128 dev_dbg(ctrl->dev, "corrected error at 0x%llx\n", 2129 (unsigned long long)err_addr); 2130 mtd->ecc_stats.corrected += corrected; 2131 /* Always exceed the software-imposed threshold */ 2132 return max(mtd->bitflip_threshold, corrected); 2133 } 2134 2135 return 0; 2136 } 2137 2138 static int brcmnand_read_page(struct nand_chip *chip, uint8_t *buf, 2139 int oob_required, int page) 2140 { 2141 struct mtd_info *mtd = nand_to_mtd(chip); 2142 struct brcmnand_host *host = nand_get_controller_data(chip); 2143 u8 *oob = oob_required ? (u8 *)chip->oob_poi : NULL; 2144 2145 nand_read_page_op(chip, page, 0, NULL, 0); 2146 2147 return brcmnand_read(mtd, chip, host->last_addr, 2148 mtd->writesize >> FC_SHIFT, (u32 *)buf, oob); 2149 } 2150 2151 static int brcmnand_read_page_raw(struct nand_chip *chip, uint8_t *buf, 2152 int oob_required, int page) 2153 { 2154 struct brcmnand_host *host = nand_get_controller_data(chip); 2155 struct mtd_info *mtd = nand_to_mtd(chip); 2156 u8 *oob = oob_required ? (u8 *)chip->oob_poi : NULL; 2157 int ret; 2158 2159 nand_read_page_op(chip, page, 0, NULL, 0); 2160 2161 brcmnand_set_ecc_enabled(host, 0); 2162 ret = brcmnand_read(mtd, chip, host->last_addr, 2163 mtd->writesize >> FC_SHIFT, (u32 *)buf, oob); 2164 brcmnand_set_ecc_enabled(host, 1); 2165 return ret; 2166 } 2167 2168 static int brcmnand_read_oob(struct nand_chip *chip, int page) 2169 { 2170 struct mtd_info *mtd = nand_to_mtd(chip); 2171 2172 return brcmnand_read(mtd, chip, (u64)page << chip->page_shift, 2173 mtd->writesize >> FC_SHIFT, 2174 NULL, (u8 *)chip->oob_poi); 2175 } 2176 2177 static int brcmnand_read_oob_raw(struct nand_chip *chip, int page) 2178 { 2179 struct mtd_info *mtd = nand_to_mtd(chip); 2180 struct brcmnand_host *host = nand_get_controller_data(chip); 2181 2182 brcmnand_set_ecc_enabled(host, 0); 2183 brcmnand_read(mtd, chip, (u64)page << chip->page_shift, 2184 mtd->writesize >> FC_SHIFT, 2185 NULL, (u8 *)chip->oob_poi); 2186 brcmnand_set_ecc_enabled(host, 1); 2187 return 0; 2188 } 2189 2190 static int brcmnand_write(struct mtd_info *mtd, struct nand_chip *chip, 2191 u64 addr, const u32 *buf, u8 *oob) 2192 { 2193 struct brcmnand_host *host = nand_get_controller_data(chip); 2194 struct brcmnand_controller *ctrl = host->ctrl; 2195 unsigned int i, j, trans = mtd->writesize >> FC_SHIFT; 2196 int status, ret = 0; 2197 2198 dev_dbg(ctrl->dev, "write %llx <- %p\n", (unsigned long long)addr, buf); 2199 2200 if (unlikely((unsigned long)buf & 0x03)) { 2201 dev_warn(ctrl->dev, "unaligned buffer: %p\n", buf); 2202 buf = (u32 *)((unsigned long)buf & ~0x03); 2203 } 2204 2205 brcmnand_wp(mtd, 0); 2206 2207 for (i = 0; i < ctrl->max_oob; i += 4) 2208 oob_reg_write(ctrl, i, 0xffffffff); 2209 2210 if (use_dma(ctrl) && !oob && flash_dma_buf_ok(buf)) { 2211 if (ctrl->dma_trans(host, addr, (u32 *)buf, mtd->writesize, 2212 CMD_PROGRAM_PAGE)) 2213 2214 ret = -EIO; 2215 2216 goto out; 2217 } 2218 2219 for (i = 0; i < trans; i++, addr += FC_BYTES) { 2220 /* full address MUST be set before populating FC */ 2221 brcmnand_set_cmd_addr(mtd, addr); 2222 2223 if (buf) { 2224 brcmnand_soc_data_bus_prepare(ctrl->soc, false); 2225 2226 for (j = 0; j < FC_WORDS; j++, buf++) 2227 brcmnand_write_fc(ctrl, j, *buf); 2228 2229 brcmnand_soc_data_bus_unprepare(ctrl->soc, false); 2230 } else if (oob) { 2231 for (j = 0; j < FC_WORDS; j++) 2232 brcmnand_write_fc(ctrl, j, 0xffffffff); 2233 } 2234 2235 if (oob) { 2236 oob += write_oob_to_regs(ctrl, i, oob, 2237 mtd->oobsize / trans, 2238 host->hwcfg.sector_size_1k); 2239 } 2240 2241 /* we cannot use SPARE_AREA_PROGRAM when PARTIAL_PAGE_EN=0 */ 2242 brcmnand_send_cmd(host, CMD_PROGRAM_PAGE); 2243 status = brcmnand_waitfunc(chip); 2244 2245 if (status & NAND_STATUS_FAIL) { 2246 dev_info(ctrl->dev, "program failed at %llx\n", 2247 (unsigned long long)addr); 2248 ret = -EIO; 2249 goto out; 2250 } 2251 } 2252 out: 2253 brcmnand_wp(mtd, 1); 2254 return ret; 2255 } 2256 2257 static int brcmnand_write_page(struct nand_chip *chip, const uint8_t *buf, 2258 int oob_required, int page) 2259 { 2260 struct mtd_info *mtd = nand_to_mtd(chip); 2261 struct brcmnand_host *host = nand_get_controller_data(chip); 2262 void *oob = oob_required ? chip->oob_poi : NULL; 2263 2264 nand_prog_page_begin_op(chip, page, 0, NULL, 0); 2265 brcmnand_write(mtd, chip, host->last_addr, (const u32 *)buf, oob); 2266 2267 return nand_prog_page_end_op(chip); 2268 } 2269 2270 static int brcmnand_write_page_raw(struct nand_chip *chip, const uint8_t *buf, 2271 int oob_required, int page) 2272 { 2273 struct mtd_info *mtd = nand_to_mtd(chip); 2274 struct brcmnand_host *host = nand_get_controller_data(chip); 2275 void *oob = oob_required ? chip->oob_poi : NULL; 2276 2277 nand_prog_page_begin_op(chip, page, 0, NULL, 0); 2278 brcmnand_set_ecc_enabled(host, 0); 2279 brcmnand_write(mtd, chip, host->last_addr, (const u32 *)buf, oob); 2280 brcmnand_set_ecc_enabled(host, 1); 2281 2282 return nand_prog_page_end_op(chip); 2283 } 2284 2285 static int brcmnand_write_oob(struct nand_chip *chip, int page) 2286 { 2287 return brcmnand_write(nand_to_mtd(chip), chip, 2288 (u64)page << chip->page_shift, NULL, 2289 chip->oob_poi); 2290 } 2291 2292 static int brcmnand_write_oob_raw(struct nand_chip *chip, int page) 2293 { 2294 struct mtd_info *mtd = nand_to_mtd(chip); 2295 struct brcmnand_host *host = nand_get_controller_data(chip); 2296 int ret; 2297 2298 brcmnand_set_ecc_enabled(host, 0); 2299 ret = brcmnand_write(mtd, chip, (u64)page << chip->page_shift, NULL, 2300 (u8 *)chip->oob_poi); 2301 brcmnand_set_ecc_enabled(host, 1); 2302 2303 return ret; 2304 } 2305 2306 /*********************************************************************** 2307 * Per-CS setup (1 NAND device) 2308 ***********************************************************************/ 2309 2310 static int brcmnand_set_cfg(struct brcmnand_host *host, 2311 struct brcmnand_cfg *cfg) 2312 { 2313 struct brcmnand_controller *ctrl = host->ctrl; 2314 struct nand_chip *chip = &host->chip; 2315 u16 cfg_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_CFG); 2316 u16 cfg_ext_offs = brcmnand_cs_offset(ctrl, host->cs, 2317 BRCMNAND_CS_CFG_EXT); 2318 u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs, 2319 BRCMNAND_CS_ACC_CONTROL); 2320 u8 block_size = 0, page_size = 0, device_size = 0; 2321 u32 tmp; 2322 2323 if (ctrl->block_sizes) { 2324 int i, found; 2325 2326 for (i = 0, found = 0; ctrl->block_sizes[i]; i++) 2327 if (ctrl->block_sizes[i] * 1024 == cfg->block_size) { 2328 block_size = i; 2329 found = 1; 2330 } 2331 if (!found) { 2332 dev_warn(ctrl->dev, "invalid block size %u\n", 2333 cfg->block_size); 2334 return -EINVAL; 2335 } 2336 } else { 2337 block_size = ffs(cfg->block_size) - ffs(BRCMNAND_MIN_BLOCKSIZE); 2338 } 2339 2340 if (cfg->block_size < BRCMNAND_MIN_BLOCKSIZE || (ctrl->max_block_size && 2341 cfg->block_size > ctrl->max_block_size)) { 2342 dev_warn(ctrl->dev, "invalid block size %u\n", 2343 cfg->block_size); 2344 block_size = 0; 2345 } 2346 2347 if (ctrl->page_sizes) { 2348 int i, found; 2349 2350 for (i = 0, found = 0; ctrl->page_sizes[i]; i++) 2351 if (ctrl->page_sizes[i] == cfg->page_size) { 2352 page_size = i; 2353 found = 1; 2354 } 2355 if (!found) { 2356 dev_warn(ctrl->dev, "invalid page size %u\n", 2357 cfg->page_size); 2358 return -EINVAL; 2359 } 2360 } else { 2361 page_size = ffs(cfg->page_size) - ffs(BRCMNAND_MIN_PAGESIZE); 2362 } 2363 2364 if (cfg->page_size < BRCMNAND_MIN_PAGESIZE || (ctrl->max_page_size && 2365 cfg->page_size > ctrl->max_page_size)) { 2366 dev_warn(ctrl->dev, "invalid page size %u\n", cfg->page_size); 2367 return -EINVAL; 2368 } 2369 2370 if (fls64(cfg->device_size) < fls64(BRCMNAND_MIN_DEVSIZE)) { 2371 dev_warn(ctrl->dev, "invalid device size 0x%llx\n", 2372 (unsigned long long)cfg->device_size); 2373 return -EINVAL; 2374 } 2375 device_size = fls64(cfg->device_size) - fls64(BRCMNAND_MIN_DEVSIZE); 2376 2377 tmp = (cfg->blk_adr_bytes << CFG_BLK_ADR_BYTES_SHIFT) | 2378 (cfg->col_adr_bytes << CFG_COL_ADR_BYTES_SHIFT) | 2379 (cfg->ful_adr_bytes << CFG_FUL_ADR_BYTES_SHIFT) | 2380 (!!(cfg->device_width == 16) << CFG_BUS_WIDTH_SHIFT) | 2381 (device_size << CFG_DEVICE_SIZE_SHIFT); 2382 if (cfg_offs == cfg_ext_offs) { 2383 tmp |= (page_size << CFG_PAGE_SIZE_SHIFT) | 2384 (block_size << CFG_BLK_SIZE_SHIFT); 2385 nand_writereg(ctrl, cfg_offs, tmp); 2386 } else { 2387 nand_writereg(ctrl, cfg_offs, tmp); 2388 tmp = (page_size << CFG_EXT_PAGE_SIZE_SHIFT) | 2389 (block_size << CFG_EXT_BLK_SIZE_SHIFT); 2390 nand_writereg(ctrl, cfg_ext_offs, tmp); 2391 } 2392 2393 tmp = nand_readreg(ctrl, acc_control_offs); 2394 tmp &= ~brcmnand_ecc_level_mask(ctrl); 2395 tmp |= cfg->ecc_level << NAND_ACC_CONTROL_ECC_SHIFT; 2396 tmp &= ~brcmnand_spare_area_mask(ctrl); 2397 tmp |= cfg->spare_area_size; 2398 nand_writereg(ctrl, acc_control_offs, tmp); 2399 2400 brcmnand_set_sector_size_1k(host, cfg->sector_size_1k); 2401 2402 /* threshold = ceil(BCH-level * 0.75) */ 2403 brcmnand_wr_corr_thresh(host, DIV_ROUND_UP(chip->ecc.strength * 3, 4)); 2404 2405 return 0; 2406 } 2407 2408 static void brcmnand_print_cfg(struct brcmnand_host *host, 2409 char *buf, struct brcmnand_cfg *cfg) 2410 { 2411 buf += sprintf(buf, 2412 "%lluMiB total, %uKiB blocks, %u%s pages, %uB OOB, %u-bit", 2413 (unsigned long long)cfg->device_size >> 20, 2414 cfg->block_size >> 10, 2415 cfg->page_size >= 1024 ? cfg->page_size >> 10 : cfg->page_size, 2416 cfg->page_size >= 1024 ? "KiB" : "B", 2417 cfg->spare_area_size, cfg->device_width); 2418 2419 /* Account for Hamming ECC and for BCH 512B vs 1KiB sectors */ 2420 if (is_hamming_ecc(host->ctrl, cfg)) 2421 sprintf(buf, ", Hamming ECC"); 2422 else if (cfg->sector_size_1k) 2423 sprintf(buf, ", BCH-%u (1KiB sector)", cfg->ecc_level << 1); 2424 else 2425 sprintf(buf, ", BCH-%u", cfg->ecc_level); 2426 } 2427 2428 /* 2429 * Minimum number of bytes to address a page. Calculated as: 2430 * roundup(log2(size / page-size) / 8) 2431 * 2432 * NB: the following does not "round up" for non-power-of-2 'size'; but this is 2433 * OK because many other things will break if 'size' is irregular... 2434 */ 2435 static inline int get_blk_adr_bytes(u64 size, u32 writesize) 2436 { 2437 return ALIGN(ilog2(size) - ilog2(writesize), 8) >> 3; 2438 } 2439 2440 static int brcmnand_setup_dev(struct brcmnand_host *host) 2441 { 2442 struct mtd_info *mtd = nand_to_mtd(&host->chip); 2443 struct nand_chip *chip = &host->chip; 2444 struct brcmnand_controller *ctrl = host->ctrl; 2445 struct brcmnand_cfg *cfg = &host->hwcfg; 2446 char msg[128]; 2447 u32 offs, tmp, oob_sector; 2448 int ret; 2449 2450 memset(cfg, 0, sizeof(*cfg)); 2451 2452 ret = of_property_read_u32(nand_get_flash_node(chip), 2453 "brcm,nand-oob-sector-size", 2454 &oob_sector); 2455 if (ret) { 2456 /* Use detected size */ 2457 cfg->spare_area_size = mtd->oobsize / 2458 (mtd->writesize >> FC_SHIFT); 2459 } else { 2460 cfg->spare_area_size = oob_sector; 2461 } 2462 if (cfg->spare_area_size > ctrl->max_oob) 2463 cfg->spare_area_size = ctrl->max_oob; 2464 /* 2465 * Set oobsize to be consistent with controller's spare_area_size, as 2466 * the rest is inaccessible. 2467 */ 2468 mtd->oobsize = cfg->spare_area_size * (mtd->writesize >> FC_SHIFT); 2469 2470 cfg->device_size = mtd->size; 2471 cfg->block_size = mtd->erasesize; 2472 cfg->page_size = mtd->writesize; 2473 cfg->device_width = (chip->options & NAND_BUSWIDTH_16) ? 16 : 8; 2474 cfg->col_adr_bytes = 2; 2475 cfg->blk_adr_bytes = get_blk_adr_bytes(mtd->size, mtd->writesize); 2476 2477 if (chip->ecc.mode != NAND_ECC_HW) { 2478 dev_err(ctrl->dev, "only HW ECC supported; selected: %d\n", 2479 chip->ecc.mode); 2480 return -EINVAL; 2481 } 2482 2483 if (chip->ecc.algo == NAND_ECC_UNKNOWN) { 2484 if (chip->ecc.strength == 1 && chip->ecc.size == 512) 2485 /* Default to Hamming for 1-bit ECC, if unspecified */ 2486 chip->ecc.algo = NAND_ECC_HAMMING; 2487 else 2488 /* Otherwise, BCH */ 2489 chip->ecc.algo = NAND_ECC_BCH; 2490 } 2491 2492 if (chip->ecc.algo == NAND_ECC_HAMMING && (chip->ecc.strength != 1 || 2493 chip->ecc.size != 512)) { 2494 dev_err(ctrl->dev, "invalid Hamming params: %d bits per %d bytes\n", 2495 chip->ecc.strength, chip->ecc.size); 2496 return -EINVAL; 2497 } 2498 2499 if (chip->ecc.mode != NAND_ECC_NONE && 2500 (!chip->ecc.size || !chip->ecc.strength)) { 2501 if (chip->base.eccreq.step_size && chip->base.eccreq.strength) { 2502 /* use detected ECC parameters */ 2503 chip->ecc.size = chip->base.eccreq.step_size; 2504 chip->ecc.strength = chip->base.eccreq.strength; 2505 dev_info(ctrl->dev, "Using ECC step-size %d, strength %d\n", 2506 chip->ecc.size, chip->ecc.strength); 2507 } 2508 } 2509 2510 switch (chip->ecc.size) { 2511 case 512: 2512 if (chip->ecc.algo == NAND_ECC_HAMMING) 2513 cfg->ecc_level = 15; 2514 else 2515 cfg->ecc_level = chip->ecc.strength; 2516 cfg->sector_size_1k = 0; 2517 break; 2518 case 1024: 2519 if (!(ctrl->features & BRCMNAND_HAS_1K_SECTORS)) { 2520 dev_err(ctrl->dev, "1KB sectors not supported\n"); 2521 return -EINVAL; 2522 } 2523 if (chip->ecc.strength & 0x1) { 2524 dev_err(ctrl->dev, 2525 "odd ECC not supported with 1KB sectors\n"); 2526 return -EINVAL; 2527 } 2528 2529 cfg->ecc_level = chip->ecc.strength >> 1; 2530 cfg->sector_size_1k = 1; 2531 break; 2532 default: 2533 dev_err(ctrl->dev, "unsupported ECC size: %d\n", 2534 chip->ecc.size); 2535 return -EINVAL; 2536 } 2537 2538 cfg->ful_adr_bytes = cfg->blk_adr_bytes; 2539 if (mtd->writesize > 512) 2540 cfg->ful_adr_bytes += cfg->col_adr_bytes; 2541 else 2542 cfg->ful_adr_bytes += 1; 2543 2544 ret = brcmnand_set_cfg(host, cfg); 2545 if (ret) 2546 return ret; 2547 2548 brcmnand_set_ecc_enabled(host, 1); 2549 2550 brcmnand_print_cfg(host, msg, cfg); 2551 dev_info(ctrl->dev, "detected %s\n", msg); 2552 2553 /* Configure ACC_CONTROL */ 2554 offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_ACC_CONTROL); 2555 tmp = nand_readreg(ctrl, offs); 2556 tmp &= ~ACC_CONTROL_PARTIAL_PAGE; 2557 tmp &= ~ACC_CONTROL_RD_ERASED; 2558 2559 /* We need to turn on Read from erased paged protected by ECC */ 2560 if (ctrl->nand_version >= 0x0702) 2561 tmp |= ACC_CONTROL_RD_ERASED; 2562 tmp &= ~ACC_CONTROL_FAST_PGM_RDIN; 2563 if (ctrl->features & BRCMNAND_HAS_PREFETCH) 2564 tmp &= ~ACC_CONTROL_PREFETCH; 2565 2566 nand_writereg(ctrl, offs, tmp); 2567 2568 return 0; 2569 } 2570 2571 static int brcmnand_attach_chip(struct nand_chip *chip) 2572 { 2573 struct mtd_info *mtd = nand_to_mtd(chip); 2574 struct brcmnand_host *host = nand_get_controller_data(chip); 2575 int ret; 2576 2577 chip->options |= NAND_NO_SUBPAGE_WRITE; 2578 /* 2579 * Avoid (for instance) kmap()'d buffers from JFFS2, which we can't DMA 2580 * to/from, and have nand_base pass us a bounce buffer instead, as 2581 * needed. 2582 */ 2583 chip->options |= NAND_USES_DMA; 2584 2585 if (chip->bbt_options & NAND_BBT_USE_FLASH) 2586 chip->bbt_options |= NAND_BBT_NO_OOB; 2587 2588 if (brcmnand_setup_dev(host)) 2589 return -ENXIO; 2590 2591 chip->ecc.size = host->hwcfg.sector_size_1k ? 1024 : 512; 2592 2593 /* only use our internal HW threshold */ 2594 mtd->bitflip_threshold = 1; 2595 2596 ret = brcmstb_choose_ecc_layout(host); 2597 2598 return ret; 2599 } 2600 2601 static const struct nand_controller_ops brcmnand_controller_ops = { 2602 .attach_chip = brcmnand_attach_chip, 2603 }; 2604 2605 static int brcmnand_init_cs(struct brcmnand_host *host, struct device_node *dn) 2606 { 2607 struct brcmnand_controller *ctrl = host->ctrl; 2608 struct platform_device *pdev = host->pdev; 2609 struct mtd_info *mtd; 2610 struct nand_chip *chip; 2611 int ret; 2612 u16 cfg_offs; 2613 2614 ret = of_property_read_u32(dn, "reg", &host->cs); 2615 if (ret) { 2616 dev_err(&pdev->dev, "can't get chip-select\n"); 2617 return -ENXIO; 2618 } 2619 2620 mtd = nand_to_mtd(&host->chip); 2621 chip = &host->chip; 2622 2623 nand_set_flash_node(chip, dn); 2624 nand_set_controller_data(chip, host); 2625 mtd->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "brcmnand.%d", 2626 host->cs); 2627 if (!mtd->name) 2628 return -ENOMEM; 2629 2630 mtd->owner = THIS_MODULE; 2631 mtd->dev.parent = &pdev->dev; 2632 2633 chip->legacy.cmd_ctrl = brcmnand_cmd_ctrl; 2634 chip->legacy.cmdfunc = brcmnand_cmdfunc; 2635 chip->legacy.waitfunc = brcmnand_waitfunc; 2636 chip->legacy.read_byte = brcmnand_read_byte; 2637 chip->legacy.read_buf = brcmnand_read_buf; 2638 chip->legacy.write_buf = brcmnand_write_buf; 2639 2640 chip->ecc.mode = NAND_ECC_HW; 2641 chip->ecc.read_page = brcmnand_read_page; 2642 chip->ecc.write_page = brcmnand_write_page; 2643 chip->ecc.read_page_raw = brcmnand_read_page_raw; 2644 chip->ecc.write_page_raw = brcmnand_write_page_raw; 2645 chip->ecc.write_oob_raw = brcmnand_write_oob_raw; 2646 chip->ecc.read_oob_raw = brcmnand_read_oob_raw; 2647 chip->ecc.read_oob = brcmnand_read_oob; 2648 chip->ecc.write_oob = brcmnand_write_oob; 2649 2650 chip->controller = &ctrl->controller; 2651 2652 /* 2653 * The bootloader might have configured 16bit mode but 2654 * NAND READID command only works in 8bit mode. We force 2655 * 8bit mode here to ensure that NAND READID commands works. 2656 */ 2657 cfg_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_CFG); 2658 nand_writereg(ctrl, cfg_offs, 2659 nand_readreg(ctrl, cfg_offs) & ~CFG_BUS_WIDTH); 2660 2661 ret = nand_scan(chip, 1); 2662 if (ret) 2663 return ret; 2664 2665 ret = mtd_device_register(mtd, NULL, 0); 2666 if (ret) 2667 nand_cleanup(chip); 2668 2669 return ret; 2670 } 2671 2672 static void brcmnand_save_restore_cs_config(struct brcmnand_host *host, 2673 int restore) 2674 { 2675 struct brcmnand_controller *ctrl = host->ctrl; 2676 u16 cfg_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_CFG); 2677 u16 cfg_ext_offs = brcmnand_cs_offset(ctrl, host->cs, 2678 BRCMNAND_CS_CFG_EXT); 2679 u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs, 2680 BRCMNAND_CS_ACC_CONTROL); 2681 u16 t1_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_TIMING1); 2682 u16 t2_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_TIMING2); 2683 2684 if (restore) { 2685 nand_writereg(ctrl, cfg_offs, host->hwcfg.config); 2686 if (cfg_offs != cfg_ext_offs) 2687 nand_writereg(ctrl, cfg_ext_offs, 2688 host->hwcfg.config_ext); 2689 nand_writereg(ctrl, acc_control_offs, host->hwcfg.acc_control); 2690 nand_writereg(ctrl, t1_offs, host->hwcfg.timing_1); 2691 nand_writereg(ctrl, t2_offs, host->hwcfg.timing_2); 2692 } else { 2693 host->hwcfg.config = nand_readreg(ctrl, cfg_offs); 2694 if (cfg_offs != cfg_ext_offs) 2695 host->hwcfg.config_ext = 2696 nand_readreg(ctrl, cfg_ext_offs); 2697 host->hwcfg.acc_control = nand_readreg(ctrl, acc_control_offs); 2698 host->hwcfg.timing_1 = nand_readreg(ctrl, t1_offs); 2699 host->hwcfg.timing_2 = nand_readreg(ctrl, t2_offs); 2700 } 2701 } 2702 2703 static int brcmnand_suspend(struct device *dev) 2704 { 2705 struct brcmnand_controller *ctrl = dev_get_drvdata(dev); 2706 struct brcmnand_host *host; 2707 2708 list_for_each_entry(host, &ctrl->host_list, node) 2709 brcmnand_save_restore_cs_config(host, 0); 2710 2711 ctrl->nand_cs_nand_select = brcmnand_read_reg(ctrl, BRCMNAND_CS_SELECT); 2712 ctrl->nand_cs_nand_xor = brcmnand_read_reg(ctrl, BRCMNAND_CS_XOR); 2713 ctrl->corr_stat_threshold = 2714 brcmnand_read_reg(ctrl, BRCMNAND_CORR_THRESHOLD); 2715 2716 if (has_flash_dma(ctrl)) 2717 ctrl->flash_dma_mode = flash_dma_readl(ctrl, FLASH_DMA_MODE); 2718 else if (has_edu(ctrl)) 2719 ctrl->edu_config = edu_readl(ctrl, EDU_CONFIG); 2720 2721 return 0; 2722 } 2723 2724 static int brcmnand_resume(struct device *dev) 2725 { 2726 struct brcmnand_controller *ctrl = dev_get_drvdata(dev); 2727 struct brcmnand_host *host; 2728 2729 if (has_flash_dma(ctrl)) { 2730 flash_dma_writel(ctrl, FLASH_DMA_MODE, ctrl->flash_dma_mode); 2731 flash_dma_writel(ctrl, FLASH_DMA_ERROR_STATUS, 0); 2732 } 2733 2734 if (has_edu(ctrl)) 2735 ctrl->edu_config = edu_readl(ctrl, EDU_CONFIG); 2736 else { 2737 edu_writel(ctrl, EDU_CONFIG, ctrl->edu_config); 2738 edu_readl(ctrl, EDU_CONFIG); 2739 brcmnand_edu_init(ctrl); 2740 } 2741 2742 brcmnand_write_reg(ctrl, BRCMNAND_CS_SELECT, ctrl->nand_cs_nand_select); 2743 brcmnand_write_reg(ctrl, BRCMNAND_CS_XOR, ctrl->nand_cs_nand_xor); 2744 brcmnand_write_reg(ctrl, BRCMNAND_CORR_THRESHOLD, 2745 ctrl->corr_stat_threshold); 2746 if (ctrl->soc) { 2747 /* Clear/re-enable interrupt */ 2748 ctrl->soc->ctlrdy_ack(ctrl->soc); 2749 ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true); 2750 } 2751 2752 list_for_each_entry(host, &ctrl->host_list, node) { 2753 struct nand_chip *chip = &host->chip; 2754 2755 brcmnand_save_restore_cs_config(host, 1); 2756 2757 /* Reset the chip, required by some chips after power-up */ 2758 nand_reset_op(chip); 2759 } 2760 2761 return 0; 2762 } 2763 2764 const struct dev_pm_ops brcmnand_pm_ops = { 2765 .suspend = brcmnand_suspend, 2766 .resume = brcmnand_resume, 2767 }; 2768 EXPORT_SYMBOL_GPL(brcmnand_pm_ops); 2769 2770 static const struct of_device_id brcmnand_of_match[] = { 2771 { .compatible = "brcm,brcmnand-v4.0" }, 2772 { .compatible = "brcm,brcmnand-v5.0" }, 2773 { .compatible = "brcm,brcmnand-v6.0" }, 2774 { .compatible = "brcm,brcmnand-v6.1" }, 2775 { .compatible = "brcm,brcmnand-v6.2" }, 2776 { .compatible = "brcm,brcmnand-v7.0" }, 2777 { .compatible = "brcm,brcmnand-v7.1" }, 2778 { .compatible = "brcm,brcmnand-v7.2" }, 2779 { .compatible = "brcm,brcmnand-v7.3" }, 2780 {}, 2781 }; 2782 MODULE_DEVICE_TABLE(of, brcmnand_of_match); 2783 2784 /*********************************************************************** 2785 * Platform driver setup (per controller) 2786 ***********************************************************************/ 2787 static int brcmnand_edu_setup(struct platform_device *pdev) 2788 { 2789 struct device *dev = &pdev->dev; 2790 struct brcmnand_controller *ctrl = dev_get_drvdata(&pdev->dev); 2791 struct resource *res; 2792 int ret; 2793 2794 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "flash-edu"); 2795 if (res) { 2796 ctrl->edu_base = devm_ioremap_resource(dev, res); 2797 if (IS_ERR(ctrl->edu_base)) 2798 return PTR_ERR(ctrl->edu_base); 2799 2800 ctrl->edu_offsets = edu_regs; 2801 2802 edu_writel(ctrl, EDU_CONFIG, EDU_CONFIG_MODE_NAND | 2803 EDU_CONFIG_SWAP_CFG); 2804 edu_readl(ctrl, EDU_CONFIG); 2805 2806 /* initialize edu */ 2807 brcmnand_edu_init(ctrl); 2808 2809 ctrl->edu_irq = platform_get_irq_optional(pdev, 1); 2810 if (ctrl->edu_irq < 0) { 2811 dev_warn(dev, 2812 "FLASH EDU enabled, using ctlrdy irq\n"); 2813 } else { 2814 ret = devm_request_irq(dev, ctrl->edu_irq, 2815 brcmnand_edu_irq, 0, 2816 "brcmnand-edu", ctrl); 2817 if (ret < 0) { 2818 dev_err(ctrl->dev, "can't allocate IRQ %d: error %d\n", 2819 ctrl->edu_irq, ret); 2820 return ret; 2821 } 2822 2823 dev_info(dev, "FLASH EDU enabled using irq %u\n", 2824 ctrl->edu_irq); 2825 } 2826 } 2827 2828 return 0; 2829 } 2830 2831 int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc) 2832 { 2833 struct device *dev = &pdev->dev; 2834 struct device_node *dn = dev->of_node, *child; 2835 struct brcmnand_controller *ctrl; 2836 struct resource *res; 2837 int ret; 2838 2839 /* We only support device-tree instantiation */ 2840 if (!dn) 2841 return -ENODEV; 2842 2843 if (!of_match_node(brcmnand_of_match, dn)) 2844 return -ENODEV; 2845 2846 ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); 2847 if (!ctrl) 2848 return -ENOMEM; 2849 2850 dev_set_drvdata(dev, ctrl); 2851 ctrl->dev = dev; 2852 2853 init_completion(&ctrl->done); 2854 init_completion(&ctrl->dma_done); 2855 init_completion(&ctrl->edu_done); 2856 nand_controller_init(&ctrl->controller); 2857 ctrl->controller.ops = &brcmnand_controller_ops; 2858 INIT_LIST_HEAD(&ctrl->host_list); 2859 2860 /* NAND register range */ 2861 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2862 ctrl->nand_base = devm_ioremap_resource(dev, res); 2863 if (IS_ERR(ctrl->nand_base)) 2864 return PTR_ERR(ctrl->nand_base); 2865 2866 /* Enable clock before using NAND registers */ 2867 ctrl->clk = devm_clk_get(dev, "nand"); 2868 if (!IS_ERR(ctrl->clk)) { 2869 ret = clk_prepare_enable(ctrl->clk); 2870 if (ret) 2871 return ret; 2872 } else { 2873 ret = PTR_ERR(ctrl->clk); 2874 if (ret == -EPROBE_DEFER) 2875 return ret; 2876 2877 ctrl->clk = NULL; 2878 } 2879 2880 /* Initialize NAND revision */ 2881 ret = brcmnand_revision_init(ctrl); 2882 if (ret) 2883 goto err; 2884 2885 /* 2886 * Most chips have this cache at a fixed offset within 'nand' block. 2887 * Some must specify this region separately. 2888 */ 2889 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-cache"); 2890 if (res) { 2891 ctrl->nand_fc = devm_ioremap_resource(dev, res); 2892 if (IS_ERR(ctrl->nand_fc)) { 2893 ret = PTR_ERR(ctrl->nand_fc); 2894 goto err; 2895 } 2896 } else { 2897 ctrl->nand_fc = ctrl->nand_base + 2898 ctrl->reg_offsets[BRCMNAND_FC_BASE]; 2899 } 2900 2901 /* FLASH_DMA */ 2902 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "flash-dma"); 2903 if (res) { 2904 ctrl->flash_dma_base = devm_ioremap_resource(dev, res); 2905 if (IS_ERR(ctrl->flash_dma_base)) { 2906 ret = PTR_ERR(ctrl->flash_dma_base); 2907 goto err; 2908 } 2909 2910 /* initialize the dma version */ 2911 brcmnand_flash_dma_revision_init(ctrl); 2912 2913 ret = -EIO; 2914 if (ctrl->nand_version >= 0x0700) 2915 ret = dma_set_mask_and_coherent(&pdev->dev, 2916 DMA_BIT_MASK(40)); 2917 if (ret) 2918 ret = dma_set_mask_and_coherent(&pdev->dev, 2919 DMA_BIT_MASK(32)); 2920 if (ret) 2921 goto err; 2922 2923 /* linked-list and stop on error */ 2924 flash_dma_writel(ctrl, FLASH_DMA_MODE, FLASH_DMA_MODE_MASK); 2925 flash_dma_writel(ctrl, FLASH_DMA_ERROR_STATUS, 0); 2926 2927 /* Allocate descriptor(s) */ 2928 ctrl->dma_desc = dmam_alloc_coherent(dev, 2929 sizeof(*ctrl->dma_desc), 2930 &ctrl->dma_pa, GFP_KERNEL); 2931 if (!ctrl->dma_desc) { 2932 ret = -ENOMEM; 2933 goto err; 2934 } 2935 2936 ctrl->dma_irq = platform_get_irq(pdev, 1); 2937 if ((int)ctrl->dma_irq < 0) { 2938 dev_err(dev, "missing FLASH_DMA IRQ\n"); 2939 ret = -ENODEV; 2940 goto err; 2941 } 2942 2943 ret = devm_request_irq(dev, ctrl->dma_irq, 2944 brcmnand_dma_irq, 0, DRV_NAME, 2945 ctrl); 2946 if (ret < 0) { 2947 dev_err(dev, "can't allocate IRQ %d: error %d\n", 2948 ctrl->dma_irq, ret); 2949 goto err; 2950 } 2951 2952 dev_info(dev, "enabling FLASH_DMA\n"); 2953 /* set flash dma transfer function to call */ 2954 ctrl->dma_trans = brcmnand_dma_trans; 2955 } else { 2956 ret = brcmnand_edu_setup(pdev); 2957 if (ret < 0) 2958 goto err; 2959 2960 /* set edu transfer function to call */ 2961 ctrl->dma_trans = brcmnand_edu_trans; 2962 } 2963 2964 /* Disable automatic device ID config, direct addressing */ 2965 brcmnand_rmw_reg(ctrl, BRCMNAND_CS_SELECT, 2966 CS_SELECT_AUTO_DEVICE_ID_CFG | 0xff, 0, 0); 2967 /* Disable XOR addressing */ 2968 brcmnand_rmw_reg(ctrl, BRCMNAND_CS_XOR, 0xff, 0, 0); 2969 2970 if (ctrl->features & BRCMNAND_HAS_WP) { 2971 /* Permanently disable write protection */ 2972 if (wp_on == 2) 2973 brcmnand_set_wp(ctrl, false); 2974 } else { 2975 wp_on = 0; 2976 } 2977 2978 /* IRQ */ 2979 ctrl->irq = platform_get_irq(pdev, 0); 2980 if ((int)ctrl->irq < 0) { 2981 dev_err(dev, "no IRQ defined\n"); 2982 ret = -ENODEV; 2983 goto err; 2984 } 2985 2986 /* 2987 * Some SoCs integrate this controller (e.g., its interrupt bits) in 2988 * interesting ways 2989 */ 2990 if (soc) { 2991 ctrl->soc = soc; 2992 2993 ret = devm_request_irq(dev, ctrl->irq, brcmnand_irq, 0, 2994 DRV_NAME, ctrl); 2995 2996 /* Enable interrupt */ 2997 ctrl->soc->ctlrdy_ack(ctrl->soc); 2998 ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true); 2999 } else { 3000 /* Use standard interrupt infrastructure */ 3001 ret = devm_request_irq(dev, ctrl->irq, brcmnand_ctlrdy_irq, 0, 3002 DRV_NAME, ctrl); 3003 } 3004 if (ret < 0) { 3005 dev_err(dev, "can't allocate IRQ %d: error %d\n", 3006 ctrl->irq, ret); 3007 goto err; 3008 } 3009 3010 for_each_available_child_of_node(dn, child) { 3011 if (of_device_is_compatible(child, "brcm,nandcs")) { 3012 struct brcmnand_host *host; 3013 3014 host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL); 3015 if (!host) { 3016 of_node_put(child); 3017 ret = -ENOMEM; 3018 goto err; 3019 } 3020 host->pdev = pdev; 3021 host->ctrl = ctrl; 3022 3023 ret = brcmnand_init_cs(host, child); 3024 if (ret) { 3025 devm_kfree(dev, host); 3026 continue; /* Try all chip-selects */ 3027 } 3028 3029 list_add_tail(&host->node, &ctrl->host_list); 3030 } 3031 } 3032 3033 /* No chip-selects could initialize properly */ 3034 if (list_empty(&ctrl->host_list)) { 3035 ret = -ENODEV; 3036 goto err; 3037 } 3038 3039 return 0; 3040 3041 err: 3042 clk_disable_unprepare(ctrl->clk); 3043 return ret; 3044 3045 } 3046 EXPORT_SYMBOL_GPL(brcmnand_probe); 3047 3048 int brcmnand_remove(struct platform_device *pdev) 3049 { 3050 struct brcmnand_controller *ctrl = dev_get_drvdata(&pdev->dev); 3051 struct brcmnand_host *host; 3052 struct nand_chip *chip; 3053 int ret; 3054 3055 list_for_each_entry(host, &ctrl->host_list, node) { 3056 chip = &host->chip; 3057 ret = mtd_device_unregister(nand_to_mtd(chip)); 3058 WARN_ON(ret); 3059 nand_cleanup(chip); 3060 } 3061 3062 clk_disable_unprepare(ctrl->clk); 3063 3064 dev_set_drvdata(&pdev->dev, NULL); 3065 3066 return 0; 3067 } 3068 EXPORT_SYMBOL_GPL(brcmnand_remove); 3069 3070 MODULE_LICENSE("GPL v2"); 3071 MODULE_AUTHOR("Kevin Cernekee"); 3072 MODULE_AUTHOR("Brian Norris"); 3073 MODULE_DESCRIPTION("NAND driver for Broadcom chips"); 3074 MODULE_ALIAS("platform:brcmnand"); 3075