1 files changed, 350 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/mxc_nand_spl.c b/drivers/mtd/nand/raw/mxc_nand_spl.c
new file mode 100644
index 0000000000..6c03db8428
--- /dev/null
+++ b/drivers/mtd/nand/raw/mxc_nand_spl.c
@@ -0,0 +1,350 @@
+// 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) {}