1 // SPDX-License-Identifier: GPL-2.0+
3 * Freescale i.MX28 NAND flash driver
5 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
6 * on behalf of DENX Software Engineering GmbH
8 * Based on code from LTIB:
9 * Freescale GPMI NFC NAND Flash Driver
11 * Copyright (C) 2010 Freescale Semiconductor, Inc.
12 * Copyright (C) 2008 Embedded Alley Solutions, Inc.
18 #include <linux/mtd/rawnand.h>
19 #include <linux/sizes.h>
20 #include <linux/types.h>
22 #include <linux/errno.h>
24 #include <asm/arch/clock.h>
25 #include <asm/arch/imx-regs.h>
26 #include <asm/mach-imx/regs-bch.h>
27 #include <asm/mach-imx/regs-gpmi.h>
28 #include <asm/arch/sys_proto.h>
31 #define MXS_NAND_DMA_DESCRIPTOR_COUNT 4
33 #if (defined(CONFIG_MX6) || defined(CONFIG_MX7))
34 #define MXS_NAND_CHUNK_DATA_CHUNK_SIZE_SHIFT 2
36 #define MXS_NAND_CHUNK_DATA_CHUNK_SIZE_SHIFT 0
38 #define MXS_NAND_METADATA_SIZE 10
39 #define MXS_NAND_BITS_PER_ECC_LEVEL 13
41 #if !defined(CONFIG_SYS_CACHELINE_SIZE) || CONFIG_SYS_CACHELINE_SIZE < 32
42 #define MXS_NAND_COMMAND_BUFFER_SIZE 32
44 #define MXS_NAND_COMMAND_BUFFER_SIZE CONFIG_SYS_CACHELINE_SIZE
47 #define MXS_NAND_BCH_TIMEOUT 10000
49 struct nand_ecclayout fake_ecc_layout;
52 * Cache management functions
54 #if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
55 static void mxs_nand_flush_data_buf(struct mxs_nand_info *info)
57 uint32_t addr = (uint32_t)info->data_buf;
59 flush_dcache_range(addr, addr + info->data_buf_size);
62 static void mxs_nand_inval_data_buf(struct mxs_nand_info *info)
64 uint32_t addr = (uint32_t)info->data_buf;
66 invalidate_dcache_range(addr, addr + info->data_buf_size);
69 static void mxs_nand_flush_cmd_buf(struct mxs_nand_info *info)
71 uint32_t addr = (uint32_t)info->cmd_buf;
73 flush_dcache_range(addr, addr + MXS_NAND_COMMAND_BUFFER_SIZE);
76 static inline void mxs_nand_flush_data_buf(struct mxs_nand_info *info) {}
77 static inline void mxs_nand_inval_data_buf(struct mxs_nand_info *info) {}
78 static inline void mxs_nand_flush_cmd_buf(struct mxs_nand_info *info) {}
81 static struct mxs_dma_desc *mxs_nand_get_dma_desc(struct mxs_nand_info *info)
83 struct mxs_dma_desc *desc;
85 if (info->desc_index >= MXS_NAND_DMA_DESCRIPTOR_COUNT) {
86 printf("MXS NAND: Too many DMA descriptors requested\n");
90 desc = info->desc[info->desc_index];
96 static void mxs_nand_return_dma_descs(struct mxs_nand_info *info)
99 struct mxs_dma_desc *desc;
101 for (i = 0; i < info->desc_index; i++) {
102 desc = info->desc[i];
103 memset(desc, 0, sizeof(struct mxs_dma_desc));
104 desc->address = (dma_addr_t)desc;
107 info->desc_index = 0;
110 static uint32_t mxs_nand_aux_status_offset(void)
112 return (MXS_NAND_METADATA_SIZE + 0x3) & ~0x3;
115 static inline bool mxs_nand_bbm_in_data_chunk(struct bch_geometry *geo, struct mtd_info *mtd,
116 unsigned int *chunk_num)
120 if (geo->ecc_chunk0_size != geo->ecc_chunkn_size) {
121 dev_err(this->dev, "The size of chunk0 must equal to chunkn\n");
125 i = (mtd->writesize * 8 - MXS_NAND_METADATA_SIZE * 8) /
126 (geo->gf_len * geo->ecc_strength +
127 geo->ecc_chunkn_size * 8);
129 j = (mtd->writesize * 8 - MXS_NAND_METADATA_SIZE * 8) -
130 (geo->gf_len * geo->ecc_strength +
131 geo->ecc_chunkn_size * 8) * i;
133 if (j < geo->ecc_chunkn_size * 8) {
135 dev_dbg(this->dev, "Set ecc to %d and bbm in chunk %d\n",
136 geo->ecc_strength, *chunk_num);
143 static inline int mxs_nand_calc_ecc_layout_by_info(struct bch_geometry *geo,
144 struct mtd_info *mtd,
145 unsigned int ecc_strength,
146 unsigned int ecc_step)
148 struct nand_chip *chip = mtd_to_nand(mtd);
149 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
150 unsigned int block_mark_bit_offset;
163 geo->ecc_chunk0_size = ecc_step;
164 geo->ecc_chunkn_size = ecc_step;
165 geo->ecc_strength = round_up(ecc_strength, 2);
167 /* Keep the C >= O */
168 if (geo->ecc_chunkn_size < mtd->oobsize)
171 if (geo->ecc_strength > nand_info->max_ecc_strength_supported)
174 geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunkn_size;
177 block_mark_bit_offset = mtd->writesize * 8 -
178 (geo->ecc_strength * geo->gf_len * (geo->ecc_chunk_count - 1)
179 + MXS_NAND_METADATA_SIZE * 8);
181 geo->block_mark_byte_offset = block_mark_bit_offset / 8;
182 geo->block_mark_bit_offset = block_mark_bit_offset % 8;
187 static inline int mxs_nand_legacy_calc_ecc_layout(struct bch_geometry *geo,
188 struct mtd_info *mtd)
190 struct nand_chip *chip = mtd_to_nand(mtd);
191 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
192 unsigned int block_mark_bit_offset;
194 /* The default for the length of Galois Field. */
197 /* The default for chunk size. */
198 geo->ecc_chunk0_size = 512;
199 geo->ecc_chunkn_size = 512;
201 if (geo->ecc_chunkn_size < mtd->oobsize) {
203 geo->ecc_chunk0_size *= 2;
204 geo->ecc_chunkn_size *= 2;
207 geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunkn_size;
210 * Determine the ECC layout with the formula:
211 * ECC bits per chunk = (total page spare data bits) /
212 * (bits per ECC level) / (chunks per page)
214 * total page spare data bits =
215 * (page oob size - meta data size) * (bits per byte)
217 geo->ecc_strength = ((mtd->oobsize - MXS_NAND_METADATA_SIZE) * 8)
218 / (geo->gf_len * geo->ecc_chunk_count);
220 geo->ecc_strength = min(round_down(geo->ecc_strength, 2),
221 nand_info->max_ecc_strength_supported);
223 block_mark_bit_offset = mtd->writesize * 8 -
224 (geo->ecc_strength * geo->gf_len * (geo->ecc_chunk_count - 1)
225 + MXS_NAND_METADATA_SIZE * 8);
227 geo->block_mark_byte_offset = block_mark_bit_offset / 8;
228 geo->block_mark_bit_offset = block_mark_bit_offset % 8;
233 static inline int mxs_nand_calc_ecc_for_large_oob(struct bch_geometry *geo,
234 struct mtd_info *mtd)
236 struct nand_chip *chip = mtd_to_nand(mtd);
237 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
238 unsigned int block_mark_bit_offset;
239 unsigned int max_ecc;
240 unsigned int bbm_chunk;
243 /* sanity check for the minimum ecc nand required */
244 if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0))
246 geo->ecc_strength = chip->ecc_strength_ds;
248 /* calculate the maximum ecc platform can support*/
250 geo->ecc_chunk0_size = 1024;
251 geo->ecc_chunkn_size = 1024;
252 geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunkn_size;
253 max_ecc = ((mtd->oobsize - MXS_NAND_METADATA_SIZE) * 8)
254 / (geo->gf_len * geo->ecc_chunk_count);
255 max_ecc = min(round_down(max_ecc, 2),
256 nand_info->max_ecc_strength_supported);
259 /* search a supported ecc strength that makes bbm */
260 /* located in data chunk */
261 geo->ecc_strength = chip->ecc_strength_ds;
262 while (!(geo->ecc_strength > max_ecc)) {
263 if (mxs_nand_bbm_in_data_chunk(geo, mtd, &bbm_chunk))
265 geo->ecc_strength += 2;
268 /* if none of them works, keep using the minimum ecc */
269 /* nand required but changing ecc page layout */
270 if (geo->ecc_strength > max_ecc) {
271 geo->ecc_strength = chip->ecc_strength_ds;
272 /* add extra ecc for meta data */
273 geo->ecc_chunk0_size = 0;
274 geo->ecc_chunk_count = (mtd->writesize / geo->ecc_chunkn_size) + 1;
275 geo->ecc_for_meta = 1;
276 /* check if oob can afford this extra ecc chunk */
277 if (mtd->oobsize * 8 < MXS_NAND_METADATA_SIZE * 8 +
278 geo->gf_len * geo->ecc_strength
279 * geo->ecc_chunk_count) {
280 printf("unsupported NAND chip with new layout\n");
284 /* calculate in which chunk bbm located */
285 bbm_chunk = (mtd->writesize * 8 - MXS_NAND_METADATA_SIZE * 8 -
286 geo->gf_len * geo->ecc_strength) /
287 (geo->gf_len * geo->ecc_strength +
288 geo->ecc_chunkn_size * 8) + 1;
291 /* calculate the number of ecc chunk behind the bbm */
292 i = (mtd->writesize / geo->ecc_chunkn_size) - bbm_chunk + 1;
294 block_mark_bit_offset = mtd->writesize * 8 -
295 (geo->ecc_strength * geo->gf_len * (geo->ecc_chunk_count - i)
296 + MXS_NAND_METADATA_SIZE * 8);
298 geo->block_mark_byte_offset = block_mark_bit_offset / 8;
299 geo->block_mark_bit_offset = block_mark_bit_offset % 8;
305 * Wait for BCH complete IRQ and clear the IRQ
307 static int mxs_nand_wait_for_bch_complete(struct mxs_nand_info *nand_info)
309 int timeout = MXS_NAND_BCH_TIMEOUT;
312 ret = mxs_wait_mask_set(&nand_info->bch_regs->hw_bch_ctrl_reg,
313 BCH_CTRL_COMPLETE_IRQ, timeout);
315 writel(BCH_CTRL_COMPLETE_IRQ, &nand_info->bch_regs->hw_bch_ctrl_clr);
321 * This is the function that we install in the cmd_ctrl function pointer of the
322 * owning struct nand_chip. The only functions in the reference implementation
323 * that use these functions pointers are cmdfunc and select_chip.
325 * In this driver, we implement our own select_chip, so this function will only
326 * be called by the reference implementation's cmdfunc. For this reason, we can
327 * ignore the chip enable bit and concentrate only on sending bytes to the NAND
330 static void mxs_nand_cmd_ctrl(struct mtd_info *mtd, int data, unsigned int ctrl)
332 struct nand_chip *nand = mtd_to_nand(mtd);
333 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
334 struct mxs_dma_desc *d;
335 uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip;
339 * If this condition is true, something is _VERY_ wrong in MTD
342 if (nand_info->cmd_queue_len == MXS_NAND_COMMAND_BUFFER_SIZE) {
343 printf("MXS NAND: Command queue too long\n");
348 * Every operation begins with a command byte and a series of zero or
349 * more address bytes. These are distinguished by either the Address
350 * Latch Enable (ALE) or Command Latch Enable (CLE) signals being
351 * asserted. When MTD is ready to execute the command, it will
352 * deasert both latch enables.
354 * Rather than run a separate DMA operation for every single byte, we
355 * queue them up and run a single DMA operation for the entire series
356 * of command and data bytes.
358 if (ctrl & (NAND_ALE | NAND_CLE)) {
359 if (data != NAND_CMD_NONE)
360 nand_info->cmd_buf[nand_info->cmd_queue_len++] = data;
365 * If control arrives here, MTD has deasserted both the ALE and CLE,
366 * which means it's ready to run an operation. Check if we have any
369 if (nand_info->cmd_queue_len == 0)
372 /* Compile the DMA descriptor -- a descriptor that sends command. */
373 d = mxs_nand_get_dma_desc(nand_info);
375 MXS_DMA_DESC_COMMAND_DMA_READ | MXS_DMA_DESC_IRQ |
376 MXS_DMA_DESC_CHAIN | MXS_DMA_DESC_DEC_SEM |
377 MXS_DMA_DESC_WAIT4END | (3 << MXS_DMA_DESC_PIO_WORDS_OFFSET) |
378 (nand_info->cmd_queue_len << MXS_DMA_DESC_BYTES_OFFSET);
380 d->cmd.address = (dma_addr_t)nand_info->cmd_buf;
382 d->cmd.pio_words[0] =
383 GPMI_CTRL0_COMMAND_MODE_WRITE |
384 GPMI_CTRL0_WORD_LENGTH |
385 (nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
386 GPMI_CTRL0_ADDRESS_NAND_CLE |
387 GPMI_CTRL0_ADDRESS_INCREMENT |
388 nand_info->cmd_queue_len;
390 mxs_dma_desc_append(channel, d);
393 mxs_nand_flush_cmd_buf(nand_info);
395 /* Execute the DMA chain. */
396 ret = mxs_dma_go(channel);
398 printf("MXS NAND: Error sending command\n");
400 mxs_nand_return_dma_descs(nand_info);
402 /* Reset the command queue. */
403 nand_info->cmd_queue_len = 0;
407 * Test if the NAND flash is ready.
409 static int mxs_nand_device_ready(struct mtd_info *mtd)
411 struct nand_chip *chip = mtd_to_nand(mtd);
412 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
415 tmp = readl(&nand_info->gpmi_regs->hw_gpmi_stat);
416 tmp >>= (GPMI_STAT_READY_BUSY_OFFSET + nand_info->cur_chip);
422 * Select the NAND chip.
424 static void mxs_nand_select_chip(struct mtd_info *mtd, int chip)
426 struct nand_chip *nand = mtd_to_nand(mtd);
427 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
429 nand_info->cur_chip = chip;
433 * Handle block mark swapping.
435 * Note that, when this function is called, it doesn't know whether it's
436 * swapping the block mark, or swapping it *back* -- but it doesn't matter
437 * because the the operation is the same.
439 static void mxs_nand_swap_block_mark(struct bch_geometry *geo,
440 uint8_t *data_buf, uint8_t *oob_buf)
442 uint32_t bit_offset = geo->block_mark_bit_offset;
443 uint32_t buf_offset = geo->block_mark_byte_offset;
449 * Get the byte from the data area that overlays the block mark. Since
450 * the ECC engine applies its own view to the bits in the page, the
451 * physical block mark won't (in general) appear on a byte boundary in
454 src = data_buf[buf_offset] >> bit_offset;
455 src |= data_buf[buf_offset + 1] << (8 - bit_offset);
461 data_buf[buf_offset] &= ~(0xff << bit_offset);
462 data_buf[buf_offset + 1] &= 0xff << bit_offset;
464 data_buf[buf_offset] |= dst << bit_offset;
465 data_buf[buf_offset + 1] |= dst >> (8 - bit_offset);
469 * Read data from NAND.
471 static void mxs_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int length)
473 struct nand_chip *nand = mtd_to_nand(mtd);
474 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
475 struct mxs_dma_desc *d;
476 uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip;
479 if (length > NAND_MAX_PAGESIZE) {
480 printf("MXS NAND: DMA buffer too big\n");
485 printf("MXS NAND: DMA buffer is NULL\n");
489 /* Compile the DMA descriptor - a descriptor that reads data. */
490 d = mxs_nand_get_dma_desc(nand_info);
492 MXS_DMA_DESC_COMMAND_DMA_WRITE | MXS_DMA_DESC_IRQ |
493 MXS_DMA_DESC_DEC_SEM | MXS_DMA_DESC_WAIT4END |
494 (1 << MXS_DMA_DESC_PIO_WORDS_OFFSET) |
495 (length << MXS_DMA_DESC_BYTES_OFFSET);
497 d->cmd.address = (dma_addr_t)nand_info->data_buf;
499 d->cmd.pio_words[0] =
500 GPMI_CTRL0_COMMAND_MODE_READ |
501 GPMI_CTRL0_WORD_LENGTH |
502 (nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
503 GPMI_CTRL0_ADDRESS_NAND_DATA |
506 mxs_dma_desc_append(channel, d);
509 * A DMA descriptor that waits for the command to end and the chip to
512 * I think we actually should *not* be waiting for the chip to become
513 * ready because, after all, we don't care. I think the original code
514 * did that and no one has re-thought it yet.
516 d = mxs_nand_get_dma_desc(nand_info);
518 MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_IRQ |
519 MXS_DMA_DESC_NAND_WAIT_4_READY | MXS_DMA_DESC_DEC_SEM |
520 MXS_DMA_DESC_WAIT4END | (1 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
524 d->cmd.pio_words[0] =
525 GPMI_CTRL0_COMMAND_MODE_WAIT_FOR_READY |
526 GPMI_CTRL0_WORD_LENGTH |
527 (nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
528 GPMI_CTRL0_ADDRESS_NAND_DATA;
530 mxs_dma_desc_append(channel, d);
532 /* Invalidate caches */
533 mxs_nand_inval_data_buf(nand_info);
535 /* Execute the DMA chain. */
536 ret = mxs_dma_go(channel);
538 printf("MXS NAND: DMA read error\n");
542 /* Invalidate caches */
543 mxs_nand_inval_data_buf(nand_info);
545 memcpy(buf, nand_info->data_buf, length);
548 mxs_nand_return_dma_descs(nand_info);
552 * Write data to NAND.
554 static void mxs_nand_write_buf(struct mtd_info *mtd, const uint8_t *buf,
557 struct nand_chip *nand = mtd_to_nand(mtd);
558 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
559 struct mxs_dma_desc *d;
560 uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip;
563 if (length > NAND_MAX_PAGESIZE) {
564 printf("MXS NAND: DMA buffer too big\n");
569 printf("MXS NAND: DMA buffer is NULL\n");
573 memcpy(nand_info->data_buf, buf, length);
575 /* Compile the DMA descriptor - a descriptor that writes data. */
576 d = mxs_nand_get_dma_desc(nand_info);
578 MXS_DMA_DESC_COMMAND_DMA_READ | MXS_DMA_DESC_IRQ |
579 MXS_DMA_DESC_DEC_SEM | MXS_DMA_DESC_WAIT4END |
580 (1 << MXS_DMA_DESC_PIO_WORDS_OFFSET) |
581 (length << MXS_DMA_DESC_BYTES_OFFSET);
583 d->cmd.address = (dma_addr_t)nand_info->data_buf;
585 d->cmd.pio_words[0] =
586 GPMI_CTRL0_COMMAND_MODE_WRITE |
587 GPMI_CTRL0_WORD_LENGTH |
588 (nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
589 GPMI_CTRL0_ADDRESS_NAND_DATA |
592 mxs_dma_desc_append(channel, d);
595 mxs_nand_flush_data_buf(nand_info);
597 /* Execute the DMA chain. */
598 ret = mxs_dma_go(channel);
600 printf("MXS NAND: DMA write error\n");
602 mxs_nand_return_dma_descs(nand_info);
606 * Read a single byte from NAND.
608 static uint8_t mxs_nand_read_byte(struct mtd_info *mtd)
611 mxs_nand_read_buf(mtd, &buf, 1);
616 * Read a page from NAND.
618 static int mxs_nand_ecc_read_page(struct mtd_info *mtd, struct nand_chip *nand,
619 uint8_t *buf, int oob_required,
622 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
623 struct bch_geometry *geo = &nand_info->bch_geometry;
624 struct mxs_dma_desc *d;
625 uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip;
626 uint32_t corrected = 0, failed = 0;
630 /* Compile the DMA descriptor - wait for ready. */
631 d = mxs_nand_get_dma_desc(nand_info);
633 MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_CHAIN |
634 MXS_DMA_DESC_NAND_WAIT_4_READY | MXS_DMA_DESC_WAIT4END |
635 (1 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
639 d->cmd.pio_words[0] =
640 GPMI_CTRL0_COMMAND_MODE_WAIT_FOR_READY |
641 GPMI_CTRL0_WORD_LENGTH |
642 (nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
643 GPMI_CTRL0_ADDRESS_NAND_DATA;
645 mxs_dma_desc_append(channel, d);
647 /* Compile the DMA descriptor - enable the BCH block and read. */
648 d = mxs_nand_get_dma_desc(nand_info);
650 MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_CHAIN |
651 MXS_DMA_DESC_WAIT4END | (6 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
655 d->cmd.pio_words[0] =
656 GPMI_CTRL0_COMMAND_MODE_READ |
657 GPMI_CTRL0_WORD_LENGTH |
658 (nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
659 GPMI_CTRL0_ADDRESS_NAND_DATA |
660 (mtd->writesize + mtd->oobsize);
661 d->cmd.pio_words[1] = 0;
662 d->cmd.pio_words[2] =
663 GPMI_ECCCTRL_ENABLE_ECC |
664 GPMI_ECCCTRL_ECC_CMD_DECODE |
665 GPMI_ECCCTRL_BUFFER_MASK_BCH_PAGE;
666 d->cmd.pio_words[3] = mtd->writesize + mtd->oobsize;
667 d->cmd.pio_words[4] = (dma_addr_t)nand_info->data_buf;
668 d->cmd.pio_words[5] = (dma_addr_t)nand_info->oob_buf;
670 mxs_dma_desc_append(channel, d);
672 /* Compile the DMA descriptor - disable the BCH block. */
673 d = mxs_nand_get_dma_desc(nand_info);
675 MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_CHAIN |
676 MXS_DMA_DESC_NAND_WAIT_4_READY | MXS_DMA_DESC_WAIT4END |
677 (3 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
681 d->cmd.pio_words[0] =
682 GPMI_CTRL0_COMMAND_MODE_WAIT_FOR_READY |
683 GPMI_CTRL0_WORD_LENGTH |
684 (nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
685 GPMI_CTRL0_ADDRESS_NAND_DATA |
686 (mtd->writesize + mtd->oobsize);
687 d->cmd.pio_words[1] = 0;
688 d->cmd.pio_words[2] = 0;
690 mxs_dma_desc_append(channel, d);
692 /* Compile the DMA descriptor - deassert the NAND lock and interrupt. */
693 d = mxs_nand_get_dma_desc(nand_info);
695 MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_IRQ |
696 MXS_DMA_DESC_DEC_SEM;
700 mxs_dma_desc_append(channel, d);
702 /* Invalidate caches */
703 mxs_nand_inval_data_buf(nand_info);
705 /* Execute the DMA chain. */
706 ret = mxs_dma_go(channel);
708 printf("MXS NAND: DMA read error\n");
712 ret = mxs_nand_wait_for_bch_complete(nand_info);
714 printf("MXS NAND: BCH read timeout\n");
718 /* Invalidate caches */
719 mxs_nand_inval_data_buf(nand_info);
721 /* Read DMA completed, now do the mark swapping. */
722 mxs_nand_swap_block_mark(geo, nand_info->data_buf, nand_info->oob_buf);
724 /* Loop over status bytes, accumulating ECC status. */
725 status = nand_info->oob_buf + mxs_nand_aux_status_offset();
726 for (i = 0; i < geo->ecc_chunk_count; i++) {
727 if (status[i] == 0x00)
730 if (status[i] == 0xff)
733 if (status[i] == 0xfe) {
738 corrected += status[i];
741 /* Propagate ECC status to the owning MTD. */
742 mtd->ecc_stats.failed += failed;
743 mtd->ecc_stats.corrected += corrected;
746 * It's time to deliver the OOB bytes. See mxs_nand_ecc_read_oob() for
747 * details about our policy for delivering the OOB.
749 * We fill the caller's buffer with set bits, and then copy the block
750 * mark to the caller's buffer. Note that, if block mark swapping was
751 * necessary, it has already been done, so we can rely on the first
752 * byte of the auxiliary buffer to contain the block mark.
754 memset(nand->oob_poi, 0xff, mtd->oobsize);
756 nand->oob_poi[0] = nand_info->oob_buf[0];
758 memcpy(buf, nand_info->data_buf, mtd->writesize);
761 mxs_nand_return_dma_descs(nand_info);
767 * Write a page to NAND.
769 static int mxs_nand_ecc_write_page(struct mtd_info *mtd,
770 struct nand_chip *nand, const uint8_t *buf,
771 int oob_required, int page)
773 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
774 struct bch_geometry *geo = &nand_info->bch_geometry;
775 struct mxs_dma_desc *d;
776 uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip;
779 memcpy(nand_info->data_buf, buf, mtd->writesize);
780 memcpy(nand_info->oob_buf, nand->oob_poi, mtd->oobsize);
782 /* Handle block mark swapping. */
783 mxs_nand_swap_block_mark(geo, nand_info->data_buf, nand_info->oob_buf);
785 /* Compile the DMA descriptor - write data. */
786 d = mxs_nand_get_dma_desc(nand_info);
788 MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_IRQ |
789 MXS_DMA_DESC_DEC_SEM | MXS_DMA_DESC_WAIT4END |
790 (6 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
794 d->cmd.pio_words[0] =
795 GPMI_CTRL0_COMMAND_MODE_WRITE |
796 GPMI_CTRL0_WORD_LENGTH |
797 (nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
798 GPMI_CTRL0_ADDRESS_NAND_DATA;
799 d->cmd.pio_words[1] = 0;
800 d->cmd.pio_words[2] =
801 GPMI_ECCCTRL_ENABLE_ECC |
802 GPMI_ECCCTRL_ECC_CMD_ENCODE |
803 GPMI_ECCCTRL_BUFFER_MASK_BCH_PAGE;
804 d->cmd.pio_words[3] = (mtd->writesize + mtd->oobsize);
805 d->cmd.pio_words[4] = (dma_addr_t)nand_info->data_buf;
806 d->cmd.pio_words[5] = (dma_addr_t)nand_info->oob_buf;
808 if (is_mx7() && nand_info->en_randomizer) {
809 d->cmd.pio_words[2] |= GPMI_ECCCTRL_RANDOMIZER_ENABLE |
810 GPMI_ECCCTRL_RANDOMIZER_TYPE2;
812 * Write NAND page number needed to be randomized
813 * to GPMI_ECCCOUNT register.
815 * The value is between 0-255. For additional details
816 * check 9.6.6.4 of i.MX7D Applications Processor reference
818 d->cmd.pio_words[3] |= (page % 255) << 16;
821 mxs_dma_desc_append(channel, d);
824 mxs_nand_flush_data_buf(nand_info);
826 /* Execute the DMA chain. */
827 ret = mxs_dma_go(channel);
829 printf("MXS NAND: DMA write error\n");
833 ret = mxs_nand_wait_for_bch_complete(nand_info);
835 printf("MXS NAND: BCH write timeout\n");
840 mxs_nand_return_dma_descs(nand_info);
845 * Read OOB from NAND.
847 * This function is a veneer that replaces the function originally installed by
848 * the NAND Flash MTD code.
850 static int mxs_nand_hook_read_oob(struct mtd_info *mtd, loff_t from,
851 struct mtd_oob_ops *ops)
853 struct nand_chip *chip = mtd_to_nand(mtd);
854 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
857 if (ops->mode == MTD_OPS_RAW)
858 nand_info->raw_oob_mode = 1;
860 nand_info->raw_oob_mode = 0;
862 ret = nand_info->hooked_read_oob(mtd, from, ops);
864 nand_info->raw_oob_mode = 0;
872 * This function is a veneer that replaces the function originally installed by
873 * the NAND Flash MTD code.
875 static int mxs_nand_hook_write_oob(struct mtd_info *mtd, loff_t to,
876 struct mtd_oob_ops *ops)
878 struct nand_chip *chip = mtd_to_nand(mtd);
879 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
882 if (ops->mode == MTD_OPS_RAW)
883 nand_info->raw_oob_mode = 1;
885 nand_info->raw_oob_mode = 0;
887 ret = nand_info->hooked_write_oob(mtd, to, ops);
889 nand_info->raw_oob_mode = 0;
895 * Mark a block bad in NAND.
897 * This function is a veneer that replaces the function originally installed by
898 * the NAND Flash MTD code.
900 static int mxs_nand_hook_block_markbad(struct mtd_info *mtd, loff_t ofs)
902 struct nand_chip *chip = mtd_to_nand(mtd);
903 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
906 nand_info->marking_block_bad = 1;
908 ret = nand_info->hooked_block_markbad(mtd, ofs);
910 nand_info->marking_block_bad = 0;
916 * There are several places in this driver where we have to handle the OOB and
917 * block marks. This is the function where things are the most complicated, so
918 * this is where we try to explain it all. All the other places refer back to
921 * These are the rules, in order of decreasing importance:
923 * 1) Nothing the caller does can be allowed to imperil the block mark, so all
924 * write operations take measures to protect it.
926 * 2) In read operations, the first byte of the OOB we return must reflect the
927 * true state of the block mark, no matter where that block mark appears in
930 * 3) ECC-based read operations return an OOB full of set bits (since we never
931 * allow ECC-based writes to the OOB, it doesn't matter what ECC-based reads
934 * 4) "Raw" read operations return a direct view of the physical bytes in the
935 * page, using the conventional definition of which bytes are data and which
936 * are OOB. This gives the caller a way to see the actual, physical bytes
937 * in the page, without the distortions applied by our ECC engine.
939 * What we do for this specific read operation depends on whether we're doing
940 * "raw" read, or an ECC-based read.
942 * It turns out that knowing whether we want an "ECC-based" or "raw" read is not
943 * easy. When reading a page, for example, the NAND Flash MTD code calls our
944 * ecc.read_page or ecc.read_page_raw function. Thus, the fact that MTD wants an
945 * ECC-based or raw view of the page is implicit in which function it calls
946 * (there is a similar pair of ECC-based/raw functions for writing).
948 * Since MTD assumes the OOB is not covered by ECC, there is no pair of
949 * ECC-based/raw functions for reading or or writing the OOB. The fact that the
950 * caller wants an ECC-based or raw view of the page is not propagated down to
953 * Since our OOB *is* covered by ECC, we need this information. So, we hook the
954 * ecc.read_oob and ecc.write_oob function pointers in the owning
955 * struct mtd_info with our own functions. These hook functions set the
956 * raw_oob_mode field so that, when control finally arrives here, we'll know
959 static int mxs_nand_ecc_read_oob(struct mtd_info *mtd, struct nand_chip *nand,
962 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
965 * First, fill in the OOB buffer. If we're doing a raw read, we need to
966 * get the bytes from the physical page. If we're not doing a raw read,
967 * we need to fill the buffer with set bits.
969 if (nand_info->raw_oob_mode) {
971 * If control arrives here, we're doing a "raw" read. Send the
972 * command to read the conventional OOB and read it.
974 nand->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
975 nand->read_buf(mtd, nand->oob_poi, mtd->oobsize);
978 * If control arrives here, we're not doing a "raw" read. Fill
979 * the OOB buffer with set bits and correct the block mark.
981 memset(nand->oob_poi, 0xff, mtd->oobsize);
983 nand->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
984 mxs_nand_read_buf(mtd, nand->oob_poi, 1);
992 * Write OOB data to NAND.
994 static int mxs_nand_ecc_write_oob(struct mtd_info *mtd, struct nand_chip *nand,
997 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
998 uint8_t block_mark = 0;
1001 * There are fundamental incompatibilities between the i.MX GPMI NFC and
1002 * the NAND Flash MTD model that make it essentially impossible to write
1003 * the out-of-band bytes.
1005 * We permit *ONE* exception. If the *intent* of writing the OOB is to
1006 * mark a block bad, we can do that.
1009 if (!nand_info->marking_block_bad) {
1010 printf("NXS NAND: Writing OOB isn't supported\n");
1014 /* Write the block mark. */
1015 nand->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
1016 nand->write_buf(mtd, &block_mark, 1);
1017 nand->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
1019 /* Check if it worked. */
1020 if (nand->waitfunc(mtd, nand) & NAND_STATUS_FAIL)
1027 * Claims all blocks are good.
1029 * In principle, this function is *only* called when the NAND Flash MTD system
1030 * isn't allowed to keep an in-memory bad block table, so it is forced to ask
1031 * the driver for bad block information.
1033 * In fact, we permit the NAND Flash MTD system to have an in-memory BBT, so
1034 * this function is *only* called when we take it away.
1036 * Thus, this function is only called when we want *all* blocks to look good,
1037 * so it *always* return success.
1039 static int mxs_nand_block_bad(struct mtd_info *mtd, loff_t ofs)
1044 static int mxs_nand_set_geometry(struct mtd_info *mtd, struct bch_geometry *geo)
1046 struct nand_chip *chip = mtd_to_nand(mtd);
1047 struct nand_chip *nand = mtd_to_nand(mtd);
1048 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
1050 if (chip->ecc_strength_ds > nand_info->max_ecc_strength_supported) {
1051 printf("unsupported NAND chip, minimum ecc required %d\n"
1052 , chip->ecc_strength_ds);
1056 if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0) &&
1057 (mtd->oobsize < 1024)) {
1058 dev_warn(this->dev, "use legacy bch geometry\n");
1059 return mxs_nand_legacy_calc_ecc_layout(geo, mtd);
1062 if (mtd->oobsize > 1024 || chip->ecc_step_ds < mtd->oobsize)
1063 return mxs_nand_calc_ecc_for_large_oob(geo, mtd);
1065 return mxs_nand_calc_ecc_layout_by_info(geo, mtd,
1066 chip->ecc_strength_ds, chip->ecc_step_ds);
1072 * At this point, the physical NAND Flash chips have been identified and
1073 * counted, so we know the physical geometry. This enables us to make some
1074 * important configuration decisions.
1076 * The return value of this function propagates directly back to this driver's
1077 * board_nand_init(). Anything other than zero will cause this driver to
1078 * tear everything down and declare failure.
1080 int mxs_nand_setup_ecc(struct mtd_info *mtd)
1082 struct nand_chip *nand = mtd_to_nand(mtd);
1083 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
1084 struct bch_geometry *geo = &nand_info->bch_geometry;
1085 struct mxs_bch_regs *bch_regs = nand_info->bch_regs;
1089 nand_info->en_randomizer = 0;
1090 nand_info->oobsize = mtd->oobsize;
1091 nand_info->writesize = mtd->writesize;
1093 ret = mxs_nand_set_geometry(mtd, geo);
1097 /* Configure BCH and set NFC geometry */
1098 mxs_reset_block(&bch_regs->hw_bch_ctrl_reg);
1100 /* Configure layout 0 */
1101 tmp = (geo->ecc_chunk_count - 1) << BCH_FLASHLAYOUT0_NBLOCKS_OFFSET;
1102 tmp |= MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET;
1103 tmp |= (geo->ecc_strength >> 1) << BCH_FLASHLAYOUT0_ECC0_OFFSET;
1104 tmp |= geo->ecc_chunk0_size >> MXS_NAND_CHUNK_DATA_CHUNK_SIZE_SHIFT;
1105 tmp |= (geo->gf_len == 14 ? 1 : 0) <<
1106 BCH_FLASHLAYOUT0_GF13_0_GF14_1_OFFSET;
1107 writel(tmp, &bch_regs->hw_bch_flash0layout0);
1108 nand_info->bch_flash0layout0 = tmp;
1110 tmp = (mtd->writesize + mtd->oobsize)
1111 << BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET;
1112 tmp |= (geo->ecc_strength >> 1) << BCH_FLASHLAYOUT1_ECCN_OFFSET;
1113 tmp |= geo->ecc_chunkn_size >> MXS_NAND_CHUNK_DATA_CHUNK_SIZE_SHIFT;
1114 tmp |= (geo->gf_len == 14 ? 1 : 0) <<
1115 BCH_FLASHLAYOUT1_GF13_0_GF14_1_OFFSET;
1116 writel(tmp, &bch_regs->hw_bch_flash0layout1);
1117 nand_info->bch_flash0layout1 = tmp;
1119 /* Set *all* chip selects to use layout 0 */
1120 writel(0, &bch_regs->hw_bch_layoutselect);
1122 /* Enable BCH complete interrupt */
1123 writel(BCH_CTRL_COMPLETE_IRQ_EN, &bch_regs->hw_bch_ctrl_set);
1125 /* Hook some operations at the MTD level. */
1126 if (mtd->_read_oob != mxs_nand_hook_read_oob) {
1127 nand_info->hooked_read_oob = mtd->_read_oob;
1128 mtd->_read_oob = mxs_nand_hook_read_oob;
1131 if (mtd->_write_oob != mxs_nand_hook_write_oob) {
1132 nand_info->hooked_write_oob = mtd->_write_oob;
1133 mtd->_write_oob = mxs_nand_hook_write_oob;
1136 if (mtd->_block_markbad != mxs_nand_hook_block_markbad) {
1137 nand_info->hooked_block_markbad = mtd->_block_markbad;
1138 mtd->_block_markbad = mxs_nand_hook_block_markbad;
1145 * Allocate DMA buffers
1147 int mxs_nand_alloc_buffers(struct mxs_nand_info *nand_info)
1150 const int size = NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE;
1152 nand_info->data_buf_size = roundup(size, MXS_DMA_ALIGNMENT);
1155 buf = memalign(MXS_DMA_ALIGNMENT, nand_info->data_buf_size);
1157 printf("MXS NAND: Error allocating DMA buffers\n");
1161 memset(buf, 0, nand_info->data_buf_size);
1163 nand_info->data_buf = buf;
1164 nand_info->oob_buf = buf + NAND_MAX_PAGESIZE;
1165 /* Command buffers */
1166 nand_info->cmd_buf = memalign(MXS_DMA_ALIGNMENT,
1167 MXS_NAND_COMMAND_BUFFER_SIZE);
1168 if (!nand_info->cmd_buf) {
1170 printf("MXS NAND: Error allocating command buffers\n");
1173 memset(nand_info->cmd_buf, 0, MXS_NAND_COMMAND_BUFFER_SIZE);
1174 nand_info->cmd_queue_len = 0;
1180 * Initializes the NFC hardware.
1182 static int mxs_nand_init_dma(struct mxs_nand_info *info)
1184 int i = 0, j, ret = 0;
1186 info->desc = malloc(sizeof(struct mxs_dma_desc *) *
1187 MXS_NAND_DMA_DESCRIPTOR_COUNT);
1193 /* Allocate the DMA descriptors. */
1194 for (i = 0; i < MXS_NAND_DMA_DESCRIPTOR_COUNT; i++) {
1195 info->desc[i] = mxs_dma_desc_alloc();
1196 if (!info->desc[i]) {
1202 /* Init the DMA controller. */
1204 for (j = MXS_DMA_CHANNEL_AHB_APBH_GPMI0;
1205 j <= MXS_DMA_CHANNEL_AHB_APBH_GPMI7; j++) {
1206 ret = mxs_dma_init_channel(j);
1211 /* Reset the GPMI block. */
1212 mxs_reset_block(&info->gpmi_regs->hw_gpmi_ctrl0_reg);
1213 mxs_reset_block(&info->bch_regs->hw_bch_ctrl_reg);
1216 * Choose NAND mode, set IRQ polarity, disable write protection and
1219 clrsetbits_le32(&info->gpmi_regs->hw_gpmi_ctrl1,
1220 GPMI_CTRL1_GPMI_MODE,
1221 GPMI_CTRL1_ATA_IRQRDY_POLARITY | GPMI_CTRL1_DEV_RESET |
1222 GPMI_CTRL1_BCH_MODE);
1227 for (--j; j >= MXS_DMA_CHANNEL_AHB_APBH_GPMI0; j--)
1230 for (--i; i >= 0; i--)
1231 mxs_dma_desc_free(info->desc[i]);
1235 printf("MXS NAND: Unable to allocate DMA descriptors\n");
1239 int mxs_nand_init_spl(struct nand_chip *nand)
1241 struct mxs_nand_info *nand_info;
1244 nand_info = malloc(sizeof(struct mxs_nand_info));
1246 printf("MXS NAND: Failed to allocate private data\n");
1249 memset(nand_info, 0, sizeof(struct mxs_nand_info));
1251 nand_info->gpmi_regs = (struct mxs_gpmi_regs *)MXS_GPMI_BASE;
1252 nand_info->bch_regs = (struct mxs_bch_regs *)MXS_BCH_BASE;
1254 if (is_mx6sx() || is_mx7())
1255 nand_info->max_ecc_strength_supported = 62;
1257 nand_info->max_ecc_strength_supported = 40;
1259 err = mxs_nand_alloc_buffers(nand_info);
1263 err = mxs_nand_init_dma(nand_info);
1267 nand_set_controller_data(nand, nand_info);
1269 nand->options |= NAND_NO_SUBPAGE_WRITE;
1271 nand->cmd_ctrl = mxs_nand_cmd_ctrl;
1272 nand->dev_ready = mxs_nand_device_ready;
1273 nand->select_chip = mxs_nand_select_chip;
1275 nand->read_byte = mxs_nand_read_byte;
1276 nand->read_buf = mxs_nand_read_buf;
1278 nand->ecc.read_page = mxs_nand_ecc_read_page;
1280 nand->ecc.mode = NAND_ECC_HW;
1285 int mxs_nand_init_ctrl(struct mxs_nand_info *nand_info)
1287 struct mtd_info *mtd;
1288 struct nand_chip *nand;
1291 nand = &nand_info->chip;
1292 mtd = nand_to_mtd(nand);
1293 err = mxs_nand_alloc_buffers(nand_info);
1297 err = mxs_nand_init_dma(nand_info);
1299 goto err_free_buffers;
1301 memset(&fake_ecc_layout, 0, sizeof(fake_ecc_layout));
1303 #ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
1304 nand->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB;
1307 nand_set_controller_data(nand, nand_info);
1308 nand->options |= NAND_NO_SUBPAGE_WRITE;
1311 nand->flash_node = dev_of_offset(nand_info->dev);
1313 nand->cmd_ctrl = mxs_nand_cmd_ctrl;
1315 nand->dev_ready = mxs_nand_device_ready;
1316 nand->select_chip = mxs_nand_select_chip;
1317 nand->block_bad = mxs_nand_block_bad;
1319 nand->read_byte = mxs_nand_read_byte;
1321 nand->read_buf = mxs_nand_read_buf;
1322 nand->write_buf = mxs_nand_write_buf;
1324 /* first scan to find the device and get the page size */
1325 if (nand_scan_ident(mtd, CONFIG_SYS_MAX_NAND_DEVICE, NULL))
1326 goto err_free_buffers;
1328 if (mxs_nand_setup_ecc(mtd))
1329 goto err_free_buffers;
1331 nand->ecc.read_page = mxs_nand_ecc_read_page;
1332 nand->ecc.write_page = mxs_nand_ecc_write_page;
1333 nand->ecc.read_oob = mxs_nand_ecc_read_oob;
1334 nand->ecc.write_oob = mxs_nand_ecc_write_oob;
1336 nand->ecc.layout = &fake_ecc_layout;
1337 nand->ecc.mode = NAND_ECC_HW;
1338 nand->ecc.size = nand_info->bch_geometry.ecc_chunkn_size;
1339 nand->ecc.strength = nand_info->bch_geometry.ecc_strength;
1341 /* second phase scan */
1342 err = nand_scan_tail(mtd);
1344 goto err_free_buffers;
1346 err = nand_register(0, mtd);
1348 goto err_free_buffers;
1353 free(nand_info->data_buf);
1354 free(nand_info->cmd_buf);
1359 #ifndef CONFIG_NAND_MXS_DT
1360 void board_nand_init(void)
1362 struct mxs_nand_info *nand_info;
1364 nand_info = malloc(sizeof(struct mxs_nand_info));
1366 printf("MXS NAND: Failed to allocate private data\n");
1369 memset(nand_info, 0, sizeof(struct mxs_nand_info));
1371 nand_info->gpmi_regs = (struct mxs_gpmi_regs *)MXS_GPMI_BASE;
1372 nand_info->bch_regs = (struct mxs_bch_regs *)MXS_BCH_BASE;
1374 /* Refer to Chapter 17 for i.MX6DQ, Chapter 18 for i.MX6SX */
1375 if (is_mx6sx() || is_mx7())
1376 nand_info->max_ecc_strength_supported = 62;
1378 nand_info->max_ecc_strength_supported = 40;
1380 #ifdef CONFIG_NAND_MXS_USE_MINIMUM_ECC
1381 nand_info->use_minimum_ecc = true;
1384 if (mxs_nand_init_ctrl(nand_info) < 0)
1395 * Read NAND layout for FCB block generation.
1397 void mxs_nand_get_layout(struct mtd_info *mtd, struct mxs_nand_layout *l)
1399 struct mxs_bch_regs *bch_regs = (struct mxs_bch_regs *)MXS_BCH_BASE;
1402 tmp = readl(&bch_regs->hw_bch_flash0layout0);
1403 l->nblocks = (tmp & BCH_FLASHLAYOUT0_NBLOCKS_MASK) >>
1404 BCH_FLASHLAYOUT0_NBLOCKS_OFFSET;
1405 l->meta_size = (tmp & BCH_FLASHLAYOUT0_META_SIZE_MASK) >>
1406 BCH_FLASHLAYOUT0_META_SIZE_OFFSET;
1408 tmp = readl(&bch_regs->hw_bch_flash0layout1);
1409 l->data0_size = 4 * ((tmp & BCH_FLASHLAYOUT0_DATA0_SIZE_MASK) >>
1410 BCH_FLASHLAYOUT0_DATA0_SIZE_OFFSET);
1411 l->ecc0 = (tmp & BCH_FLASHLAYOUT0_ECC0_MASK) >>
1412 BCH_FLASHLAYOUT0_ECC0_OFFSET;
1413 l->datan_size = 4 * ((tmp & BCH_FLASHLAYOUT1_DATAN_SIZE_MASK) >>
1414 BCH_FLASHLAYOUT1_DATAN_SIZE_OFFSET);
1415 l->eccn = (tmp & BCH_FLASHLAYOUT1_ECCN_MASK) >>
1416 BCH_FLASHLAYOUT1_ECCN_OFFSET;
1420 * Set BCH to specific layout used by ROM bootloader to read FCB.
1422 void mxs_nand_mode_fcb(struct mtd_info *mtd)
1425 struct mxs_bch_regs *bch_regs = (struct mxs_bch_regs *)MXS_BCH_BASE;
1426 struct nand_chip *nand = mtd_to_nand(mtd);
1427 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
1429 nand_info->en_randomizer = 1;
1431 mtd->writesize = 1024;
1432 mtd->oobsize = 1862 - 1024;
1435 tmp = 7 << BCH_FLASHLAYOUT0_NBLOCKS_OFFSET;
1436 /* 32 bytes for metadata */
1437 tmp |= 32 << BCH_FLASHLAYOUT0_META_SIZE_OFFSET;
1438 /* using ECC62 level to be performed */
1439 tmp |= 0x1F << BCH_FLASHLAYOUT0_ECC0_OFFSET;
1440 /* 0x20 * 4 bytes of the data0 block */
1441 tmp |= 0x20 << BCH_FLASHLAYOUT0_DATA0_SIZE_OFFSET;
1442 tmp |= 0 << BCH_FLASHLAYOUT0_GF13_0_GF14_1_OFFSET;
1443 writel(tmp, &bch_regs->hw_bch_flash0layout0);
1445 /* 1024 for data + 838 for OOB */
1446 tmp = 1862 << BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET;
1447 /* using ECC62 level to be performed */
1448 tmp |= 0x1F << BCH_FLASHLAYOUT1_ECCN_OFFSET;
1449 /* 0x20 * 4 bytes of the data0 block */
1450 tmp |= 0x20 << BCH_FLASHLAYOUT1_DATAN_SIZE_OFFSET;
1451 tmp |= 0 << BCH_FLASHLAYOUT1_GF13_0_GF14_1_OFFSET;
1452 writel(tmp, &bch_regs->hw_bch_flash0layout1);
1456 * Restore BCH to normal settings.
1458 void mxs_nand_mode_normal(struct mtd_info *mtd)
1460 struct mxs_bch_regs *bch_regs = (struct mxs_bch_regs *)MXS_BCH_BASE;
1461 struct nand_chip *nand = mtd_to_nand(mtd);
1462 struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
1464 nand_info->en_randomizer = 0;
1466 mtd->writesize = nand_info->writesize;
1467 mtd->oobsize = nand_info->oobsize;
1469 writel(nand_info->bch_flash0layout0, &bch_regs->hw_bch_flash0layout0);
1470 writel(nand_info->bch_flash0layout1, &bch_regs->hw_bch_flash0layout1);
1473 uint32_t mxs_nand_mark_byte_offset(struct mtd_info *mtd)
1475 struct nand_chip *chip = mtd_to_nand(mtd);
1476 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
1477 struct bch_geometry *geo = &nand_info->bch_geometry;
1479 return geo->block_mark_byte_offset;
1482 uint32_t mxs_nand_mark_bit_offset(struct mtd_info *mtd)
1484 struct nand_chip *chip = mtd_to_nand(mtd);
1485 struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
1486 struct bch_geometry *geo = &nand_info->bch_geometry;
1488 return geo->block_mark_bit_offset;