+nand functions

u-boot-tree/drivers/mtd/nand/raw/Makefile

+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+
+ifdef CONFIG_SPL_BUILD
+
+ifdef CONFIG_SPL_NAND_DRIVERS
+NORMAL_DRIVERS=y
+endif
+
+obj-$(CONFIG_SPL_NAND_AM33XX_BCH) += am335x_spl_bch.o
+obj-$(CONFIG_SPL_NAND_DENALI) += denali_spl.o
+obj-$(CONFIG_SPL_NAND_SIMPLE) += nand_spl_simple.o
+obj-$(CONFIG_SPL_NAND_ELPHEL393) += elphel393_nand_spl.o
+obj-$(CONFIG_SPL_NAND_LOAD) += nand_spl_load.o
+obj-$(CONFIG_SPL_NAND_ECC) += nand_ecc.o
+obj-$(CONFIG_SPL_NAND_BASE) += nand_base.o
+obj-$(CONFIG_SPL_NAND_IDENT) += nand_ids.o nand_timings.o
+obj-$(CONFIG_SPL_NAND_INIT) += nand.o
+ifeq ($(CONFIG_SPL_ENV_SUPPORT),y)
+obj-$(CONFIG_ENV_IS_IN_NAND) += nand_util.o
+endif
+
+else # not spl
+
+NORMAL_DRIVERS=y
+
+obj-y += nand.o
+obj-y += nand_bbt.o
+obj-y += nand_ids.o
+obj-y += nand_util.o
+obj-y += nand_ecc.o
+obj-y += nand_base.o
+obj-y += nand_timings.o
+
+endif # not spl
+
+ifdef NORMAL_DRIVERS
+
+obj-$(CONFIG_NAND_ECC_BCH) += nand_bch.o
+
+obj-$(CONFIG_NAND_ATMEL) += atmel_nand.o
+obj-$(CONFIG_NAND_ARASAN) += arasan_nfc.o
+obj-$(CONFIG_NAND_DAVINCI) += davinci_nand.o
+obj-$(CONFIG_NAND_DENALI) += denali.o
+obj-$(CONFIG_NAND_DENALI_DT) += denali_dt.o
+obj-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_nand.o
+obj-$(CONFIG_NAND_FSL_IFC) += fsl_ifc_nand.o
+obj-$(CONFIG_NAND_FSL_UPM) += fsl_upm.o
+obj-$(CONFIG_NAND_FSMC) += fsmc_nand.o
+obj-$(CONFIG_NAND_KB9202) += kb9202_nand.o
+obj-$(CONFIG_NAND_KIRKWOOD) += kirkwood_nand.o
+obj-$(CONFIG_NAND_KMETER1) += kmeter1_nand.o
+obj-$(CONFIG_NAND_LPC32XX_MLC) += lpc32xx_nand_mlc.o
+obj-$(CONFIG_NAND_LPC32XX_SLC) += lpc32xx_nand_slc.o
+obj-$(CONFIG_NAND_VF610_NFC) += vf610_nfc.o
+obj-$(CONFIG_NAND_MXC) += mxc_nand.o
+obj-$(CONFIG_NAND_MXS) += mxs_nand.o
+obj-$(CONFIG_NAND_MXS_DT) += mxs_nand_dt.o
+obj-$(CONFIG_NAND_PXA3XX) += pxa3xx_nand.o
+obj-$(CONFIG_NAND_SPEAR) += spr_nand.o
+obj-$(CONFIG_TEGRA_NAND) += tegra_nand.o
+obj-$(CONFIG_NAND_OMAP_GPMC) += omap_gpmc.o
+obj-$(CONFIG_NAND_OMAP_ELM) += omap_elm.o
+obj-$(CONFIG_NAND_PLAT) += nand_plat.o
+obj-$(CONFIG_NAND_SUNXI) += sunxi_nand.o
+obj-$(CONFIG_NAND_ZYNQ) += zynq_nand.o
+
+else  # minimal SPL drivers
+
+obj-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_spl.o
+obj-$(CONFIG_NAND_FSL_IFC) += fsl_ifc_spl.o
+obj-$(CONFIG_NAND_MXC) += mxc_nand_spl.o
+obj-$(CONFIG_NAND_MXS) += mxs_nand_spl.o mxs_nand.o
+obj-$(CONFIG_NAND_SUNXI) += sunxi_nand_spl.o
+
+endif # drivers

u-boot-tree/drivers/mtd/nand/raw/elphel393_nand_spl.c

+/*
+ * Elphel393 NAND driver for SPL, not based on denali_spl.c
+ *
+ * Copyright (C) 2016 Elphel, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <nand.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand_ecc.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sys_proto.h>
+
+extern nand_info_t nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
+
+static int is_badblock(struct mtd_info *mtd, loff_t offs, int allowbbt)
+{
+	register struct nand_chip *chip = mtd->priv;
+	unsigned int block = offs >> chip->phys_erase_shift;
+	unsigned int page = offs >> chip->page_shift;
+	unsigned long data_width = 4;
+	
+	debug("    is_badblock(): offs=0x%08x block=%d page=%d\n",(int)offs,block,page);
+	chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
+	chip->read_buf(mtd, chip->oob_poi, (mtd->oobsize - data_width));
+	
+	printf("    is_badblock(): offs=0x%08x block=0x%08x page=0x%08x chip->oob_poi[0]=0x%08x\n",(u32)offs,(u32)block,(u32)page,(u32)chip->oob_poi[0]);
+	
+	return chip->oob_poi[0] != 0xff;
+}
+
+//dst or buf - destination in RAM
+//offs - u-boot-dtb.img offset in NAND
+//size - size of u-boot-dtb.img
+int nand_spl_load_image(uint32_t offs, unsigned int size, void *buf)
+{
+	struct nand_chip *chip;
+	struct mtd_info *mtd;
+	unsigned int page;
+	unsigned int nand_page_per_block;
+	unsigned int sz = 0;
+
+	debug("\nnand_spl_load_image(): offs=0x%08x size=%d (0x%08x) buf_addr=0x%08x\n",offs,size,size,buf);
+	udelay(10000);
+
+	//if (mxs_nand_init()) return -ENODEV;
+	mtd = &nand_info[0];
+	//mtd.priv = &nand_chip;
+	chip = mtd->priv;
+	page = offs >> chip->page_shift;
+	nand_page_per_block = mtd->erasesize / mtd->writesize;
+
+	debug("%s offset:0x%08x len:%d page:%d\n", __func__, offs, size, page);
+
+	debug("  nand_page_per_block= %d\n",nand_page_per_block);
+	debug("  mtd->writesize= %d\n",mtd->writesize);
+	debug("  u-boot-dtb.img size is: %d (0x%08x)\n",size,size);
+	
+	size = roundup(size, mtd->writesize);
+
+	debug("  u-boot-dtb.img size after roundup is:%d\n",size);
+
+	while (sz < size) {
+		//if (mxs_read_page_ecc(&mtd, buf, page) < 0)
+		//	return -1;
+		//printf("  Reading from NAND, offset:0x%08x page_index:%d to MEM address:0x%08x\n",offs, page, buf);
+
+		chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
+		udelay(500);
+		//read min
+		chip->read_buf(mtd,buf,min(size-sz, mtd->writesize));
+
+		//chip->ecc.read_page(mtd, chip, buf, 0, page);
+		sz += mtd->writesize;
+		offs += mtd->writesize;
+		page++;
+		buf += mtd->writesize;
+
+		
+		/*
+		 * Check if we have crossed a block boundary, and if so
+		 * check for bad block.
+		 */
+		//on-die ecc is enabled
+		//if (!(page % nand_page_per_block)) {
+		//	/*
+		//	 * Yes, new block. See if this block is good. If not,
+		//	 * loop until we find a good block.
+		//	 */
+		//	while (is_badblock(&mtd, offs, 1)) {
+		//		page = page + nand_page_per_block;
+		//		/* Check we've reached the end of flash. */
+		//		if (page >= mtd->size >> chip->page_shift)
+		//			return -ENOMEM;
+		//	}
+		//}
+	}
+	return 0;
+}
+
+/* already defined in nand.c
+// nand_init() - initialize data to make nand usable by SPL
+void nand_init(void)
+{
+	puts("nand_init()\n");
+	udelay(5000);
+	board_nand_init();
+}
+*/
+
+void nand_deselect(void) {
+	debug("nand_deselect()\n");
+	udelay(10000);
+}