mtd: move NAND files into a raw/ subdirectory

NAND flavors, like serial and parallel, have a lot in common and would
benefit to share code. Let's move raw (parallel) NAND specific code in a
raw/ subdirectory, to ease the addition of a core file in nand/ and the
introduction of a spi/ subdirectory specific to SPI NANDs.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

1 files changed, 0 insertions, 350 deletions

diff --git a/drivers/mtd/nand/mxc_nand_spl.c b/drivers/mtd/nand/mxc_nand_spl.c
deleted file mode 100644
index 6c03db8428..0000000000
--- a/drivers/mtd/nand/mxc_nand_spl.c
+++ /dev/null
@@ -1,350 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * (C) Copyright 2009
- * Magnus Lilja <lilja.magnus@gmail.com>
- *
- * (C) Copyright 2008
- * Maxim Artamonov, <scn1874 at yandex.ru>
- *
- * (C) Copyright 2006-2008
- * Stefan Roese, DENX Software Engineering, sr at denx.de.
- */
-
-#include <common.h>
-#include <nand.h>
-#include <asm/arch/imx-regs.h>
-#include <asm/io.h>
-#include "mxc_nand.h"
-
-#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1)
-static struct mxc_nand_regs *const nfc = (void *)NFC_BASE_ADDR;
-#elif defined(MXC_NFC_V3_2)
-static struct mxc_nand_regs *const nfc = (void *)NFC_BASE_ADDR_AXI;
-static struct mxc_nand_ip_regs *const nfc_ip = (void *)NFC_BASE_ADDR;
-#endif
-
-static void nfc_wait_ready(void)
-{
-	uint32_t tmp;
-
-#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1)
-	while (!(readnfc(&nfc->config2) & NFC_V1_V2_CONFIG2_INT))
-		;
-
-	/* Reset interrupt flag */
-	tmp = readnfc(&nfc->config2);
-	tmp &= ~NFC_V1_V2_CONFIG2_INT;
-	writenfc(tmp, &nfc->config2);
-#elif defined(MXC_NFC_V3_2)
-	while (!(readnfc(&nfc_ip->ipc) & NFC_V3_IPC_INT))
-		;
-
-	/* Reset interrupt flag */
-	tmp = readnfc(&nfc_ip->ipc);
-	tmp &= ~NFC_V3_IPC_INT;
-	writenfc(tmp, &nfc_ip->ipc);
-#endif
-}
-
-static void nfc_nand_init(void)
-{
-#if defined(MXC_NFC_V3_2)
-	int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512;
-	int tmp;
-
-	tmp = (readnfc(&nfc_ip->config2) & ~(NFC_V3_CONFIG2_SPAS_MASK |
-			NFC_V3_CONFIG2_EDC_MASK | NFC_V3_CONFIG2_PS_MASK)) |
-		NFC_V3_CONFIG2_SPAS(CONFIG_SYS_NAND_OOBSIZE / 2) |
-		NFC_V3_CONFIG2_INT_MSK | NFC_V3_CONFIG2_ECC_EN |
-		NFC_V3_CONFIG2_ONE_CYCLE;
-	if (CONFIG_SYS_NAND_PAGE_SIZE == 4096)
-		tmp |= NFC_V3_CONFIG2_PS_4096;
-	else if (CONFIG_SYS_NAND_PAGE_SIZE == 2048)
-		tmp |= NFC_V3_CONFIG2_PS_2048;
-	else if (CONFIG_SYS_NAND_PAGE_SIZE == 512)
-		tmp |= NFC_V3_CONFIG2_PS_512;
-	/*
-	 * if spare size is larger that 16 bytes per 512 byte hunk
-	 * then use 8 symbol correction instead of 4
-	 */
-	if (CONFIG_SYS_NAND_OOBSIZE / ecc_per_page > 16)
-		tmp |= NFC_V3_CONFIG2_ECC_MODE_8;
-	else
-		tmp &= ~NFC_V3_CONFIG2_ECC_MODE_8;
-	writenfc(tmp, &nfc_ip->config2);
-
-	tmp = NFC_V3_CONFIG3_NUM_OF_DEVS(0) |
-			NFC_V3_CONFIG3_NO_SDMA |
-			NFC_V3_CONFIG3_RBB_MODE |
-			NFC_V3_CONFIG3_SBB(6) | /* Reset default */
-			NFC_V3_CONFIG3_ADD_OP(0);
-#ifndef CONFIG_SYS_NAND_BUSWIDTH_16
-	tmp |= NFC_V3_CONFIG3_FW8;
-#endif
-	writenfc(tmp, &nfc_ip->config3);
-
-	writenfc(0, &nfc_ip->delay_line);
-#elif defined(MXC_NFC_V2_1)
-	int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512;
-	int config1;
-
-	writenfc(CONFIG_SYS_NAND_OOBSIZE / 2, &nfc->spare_area_size);
-
-	/* unlocking RAM Buff */
-	writenfc(0x2, &nfc->config);
-
-	/* hardware ECC checking and correct */
-	config1 = readnfc(&nfc->config1) | NFC_V1_V2_CONFIG1_ECC_EN |
-			NFC_V1_V2_CONFIG1_INT_MSK | NFC_V2_CONFIG1_ONE_CYCLE |
-			NFC_V2_CONFIG1_FP_INT;
-	/*
-	 * if spare size is larger that 16 bytes per 512 byte hunk
-	 * then use 8 symbol correction instead of 4
-	 */
-	if (CONFIG_SYS_NAND_OOBSIZE / ecc_per_page > 16)
-		config1 &= ~NFC_V2_CONFIG1_ECC_MODE_4;
-	else
-		config1 |= NFC_V2_CONFIG1_ECC_MODE_4;
-	writenfc(config1, &nfc->config1);
-#elif defined(MXC_NFC_V1)
-	/* unlocking RAM Buff */
-	writenfc(0x2, &nfc->config);
-
-	/* hardware ECC checking and correct */
-	writenfc(NFC_V1_V2_CONFIG1_ECC_EN | NFC_V1_V2_CONFIG1_INT_MSK,
-			&nfc->config1);
-#endif
-}
-
-static void nfc_nand_command(unsigned short command)
-{
-	writenfc(command, &nfc->flash_cmd);
-	writenfc(NFC_CMD, &nfc->operation);
-	nfc_wait_ready();
-}
-
-static void nfc_nand_address(unsigned short address)
-{
-	writenfc(address, &nfc->flash_addr);
-	writenfc(NFC_ADDR, &nfc->operation);
-	nfc_wait_ready();
-}
-
-static void nfc_nand_page_address(unsigned int page_address)
-{
-	unsigned int page_count;
-
-	nfc_nand_address(0x00);
-
-	/* code only for large page flash */
-	if (CONFIG_SYS_NAND_PAGE_SIZE > 512)
-		nfc_nand_address(0x00);
-
-	page_count = CONFIG_SYS_NAND_SIZE / CONFIG_SYS_NAND_PAGE_SIZE;
-
-	if (page_address <= page_count) {
-		page_count--; /* transform 0x01000000 to 0x00ffffff */
-		do {
-			nfc_nand_address(page_address & 0xff);
-			page_address = page_address >> 8;
-			page_count = page_count >> 8;
-		} while (page_count);
-	}
-
-	nfc_nand_address(0x00);
-}
-
-static void nfc_nand_data_output(void)
-{
-#ifdef NAND_MXC_2K_MULTI_CYCLE
-	int i;
-#endif
-
-#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1)
-	writenfc(0, &nfc->buf_addr);
-#elif defined(MXC_NFC_V3_2)
-	int config1 = readnfc(&nfc->config1);
-	config1 &= ~NFC_V3_CONFIG1_RBA_MASK;
-	writenfc(config1, &nfc->config1);
-#endif
-	writenfc(NFC_OUTPUT, &nfc->operation);
-	nfc_wait_ready();
-#ifdef NAND_MXC_2K_MULTI_CYCLE
-	/*
-	 * This NAND controller requires multiple input commands
-	 * for pages larger than 512 bytes.
-	 */
-	for (i = 1; i < CONFIG_SYS_NAND_PAGE_SIZE / 512; i++) {
-		writenfc(i, &nfc->buf_addr);
-		writenfc(NFC_OUTPUT, &nfc->operation);
-		nfc_wait_ready();
-	}
-#endif
-}
-
-static int nfc_nand_check_ecc(void)
-{
-#if defined(MXC_NFC_V1)
-	u16 ecc_status = readw(&nfc->ecc_status_result);
-	return (ecc_status & 0x3) == 2 || (ecc_status >> 2) == 2;
-#elif defined(MXC_NFC_V2_1) || defined(MXC_NFC_V3_2)
-	u32 ecc_status = readl(&nfc->ecc_status_result);
-	int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512;
-	int err_limit = CONFIG_SYS_NAND_OOBSIZE / ecc_per_page > 16 ? 8 : 4;
-	int subpages = CONFIG_SYS_NAND_PAGE_SIZE / 512;
-
-	do {
-		if ((ecc_status & 0xf) > err_limit)
-			return 1;
-		ecc_status >>= 4;
-	} while (--subpages);
-
-	return 0;
-#endif
-}
-
-static void nfc_nand_read_page(unsigned int page_address)
-{
-	/* read in first 0 buffer */
-#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1)
-	writenfc(0, &nfc->buf_addr);
-#elif defined(MXC_NFC_V3_2)
-	int config1 = readnfc(&nfc->config1);
-	config1 &= ~NFC_V3_CONFIG1_RBA_MASK;
-	writenfc(config1, &nfc->config1);
-#endif
-	nfc_nand_command(NAND_CMD_READ0);
-	nfc_nand_page_address(page_address);
-
-	if (CONFIG_SYS_NAND_PAGE_SIZE > 512)
-		nfc_nand_command(NAND_CMD_READSTART);
-
-	nfc_nand_data_output(); /* fill the main buffer 0 */
-}
-
-static int nfc_read_page(unsigned int page_address, unsigned char *buf)
-{
-	int i;
-	u32 *src;
-	u32 *dst;
-
-	nfc_nand_read_page(page_address);
-
-	if (nfc_nand_check_ecc())
-		return -EBADMSG;
-
-	src = (u32 *)&nfc->main_area[0][0];
-	dst = (u32 *)buf;
-
-	/* main copy loop from NAND-buffer to SDRAM memory */
-	for (i = 0; i < CONFIG_SYS_NAND_PAGE_SIZE / 4; i++) {
-		writel(readl(src), dst);
-		src++;
-		dst++;
-	}
-
-	return 0;
-}
-
-static int is_badblock(int pagenumber)
-{
-	int page = pagenumber;
-	u32 badblock;
-	u32 *src;
-
-	/* Check the first two pages for bad block markers */
-	for (page = pagenumber; page < pagenumber + 2; page++) {
-		nfc_nand_read_page(page);
-
-		src = (u32 *)&nfc->spare_area[0][0];
-
-		/*
-		 * IMPORTANT NOTE: The nand flash controller uses a non-
-		 * standard layout for large page devices. This can
-		 * affect the position of the bad block marker.
-		 */
-		/* Get the bad block marker */
-		badblock = readl(&src[CONFIG_SYS_NAND_BAD_BLOCK_POS / 4]);
-		badblock >>= 8 * (CONFIG_SYS_NAND_BAD_BLOCK_POS % 4);
-		badblock &= 0xff;
-
-		/* bad block marker verify */
-		if (badblock != 0xff)
-			return 1; /* potential bad block */
-	}
-
-	return 0;
-}
-
-int nand_spl_load_image(uint32_t from, unsigned int size, void *buf)
-{
-	int i;
-	unsigned int page;
-	unsigned int maxpages = CONFIG_SYS_NAND_SIZE /
-				CONFIG_SYS_NAND_PAGE_SIZE;
-
-	nfc_nand_init();
-
-	/* Convert to page number */
-	page = from / CONFIG_SYS_NAND_PAGE_SIZE;
-	i = 0;
-
-	size = roundup(size, CONFIG_SYS_NAND_PAGE_SIZE);
-	while (i < size / CONFIG_SYS_NAND_PAGE_SIZE) {
-		if (nfc_read_page(page, buf) < 0)
-			return -1;
-
-		page++;
-		i++;
-		buf = buf + CONFIG_SYS_NAND_PAGE_SIZE;
-
-		/*
-		 * Check if we have crossed a block boundary, and if so
-		 * check for bad block.
-		 */
-		if (!(page % CONFIG_SYS_NAND_PAGE_COUNT)) {
-			/*
-			 * Yes, new block. See if this block is good. If not,
-			 * loop until we find a good block.
-			 */
-			while (is_badblock(page)) {
-				page = page + CONFIG_SYS_NAND_PAGE_COUNT;
-				/* Check i we've reached the end of flash. */
-				if (page >= maxpages)
-					return -1;
-			}
-		}
-	}
-
-	return 0;
-}
-
-#ifndef CONFIG_SPL_FRAMEWORK
-/*
- * The main entry for NAND booting. It's necessary that SDRAM is already
- * configured and available since this code loads the main U-Boot image
- * from NAND into SDRAM and starts it from there.
- */
-void nand_boot(void)
-{
-	__attribute__((noreturn)) void (*uboot)(void);
-
-	/*
-	 * CONFIG_SYS_NAND_U_BOOT_OFFS and CONFIG_SYS_NAND_U_BOOT_SIZE must
-	 * be aligned to full pages
-	 */
-	if (!nand_spl_load_image(CONFIG_SYS_NAND_U_BOOT_OFFS,
-			CONFIG_SYS_NAND_U_BOOT_SIZE,
-			(uchar *)CONFIG_SYS_NAND_U_BOOT_DST)) {
-		/* Copy from NAND successful, start U-Boot */
-		uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
-		uboot();
-	} else {
-		/* Unrecoverable error when copying from NAND */
-		hang();
-	}
-}
-#endif
-
-void nand_init(void) {}
-void nand_deselect(void) {}