--- /dev/null
+/*
+ * (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.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#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 -1;
+
+ 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) {}
Code Review / kvmfornfv.git / blobdiff