1 files changed, 429 insertions, 0 deletions
diff --git a/package/uboot-xburst/files/nand_spl/nand_boot_jz4740.c b/package/uboot-xburst/files/nand_spl/nand_boot_jz4740.c
new file mode 100644
index 000000000..9df0596e8
--- /dev/null
+++ b/package/uboot-xburst/files/nand_spl/nand_boot_jz4740.c
@@ -0,0 +1,429 @@
+/*
+ * Copyright (C) 2007 Ingenic Semiconductor Inc.
+ * Author: Peter <jlwei@ingenic.cn>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <nand.h>
+
+#include <asm/io.h>
+#include <asm/jz4740.h>
+
+#define KEY_U_OUT       (32 * 2 + 16)
+#define KEY_U_IN        (32 * 3 + 19)
+
+/*
+ * NAND flash definitions
+ */
+
+#define NAND_DATAPORT	0xb8000000
+#define NAND_ADDRPORT	0xb8010000
+#define NAND_COMMPORT	0xb8008000
+
+#define ECC_BLOCK	512
+#define ECC_POS		6
+#define PAR_SIZE	9
+
+#define __nand_enable()		(REG_EMC_NFCSR |= EMC_NFCSR_NFE1 | EMC_NFCSR_NFCE1)
+#define __nand_disable()	(REG_EMC_NFCSR &= ~(EMC_NFCSR_NFCE1))
+#define __nand_ecc_rs_encoding() \
+	(REG_EMC_NFECR = EMC_NFECR_ECCE | EMC_NFECR_ERST | EMC_NFECR_RS | EMC_NFECR_RS_ENCODING)
+#define __nand_ecc_rs_decoding() \
+	(REG_EMC_NFECR = EMC_NFECR_ECCE | EMC_NFECR_ERST | EMC_NFECR_RS | EMC_NFECR_RS_DECODING)
+#define __nand_ecc_disable()	(REG_EMC_NFECR &= ~EMC_NFECR_ECCE)
+#define __nand_ecc_encode_sync() while (!(REG_EMC_NFINTS & EMC_NFINTS_ENCF))
+#define __nand_ecc_decode_sync() while (!(REG_EMC_NFINTS & EMC_NFINTS_DECF))
+
+static inline void __nand_dev_ready(void)
+{
+	unsigned int timeout = 10000;
+	while ((REG_GPIO_PXPIN(2) & 0x40000000) && timeout--);
+	while (!(REG_GPIO_PXPIN(2) & 0x40000000));
+}
+
+#define __nand_cmd(n)		(REG8(NAND_COMMPORT) = (n))
+#define __nand_addr(n)		(REG8(NAND_ADDRPORT) = (n))
+#define __nand_data8()		REG8(NAND_DATAPORT)
+#define __nand_data16()		REG16(NAND_DATAPORT)
+
+#if (JZ4740_NANDBOOT_CFG == JZ4740_NANDBOOT_B8R3)
+	#define NAND_BUS_WIDTH 8
+	#define NAND_ROW_CYCLE 3
+#elif (JZ4740_NANDBOOT_CFG == JZ4740_NANDBOOT_B8R2)
+	#define NAND_BUS_WIDTH 8
+	#define NAND_ROW_CYCLE 2
+#elif (JZ4740_NANDBOOT_CFG == JZ4740_NANDBOOT_B16R3)
+	#define NAND_BUS_WIDTH 16
+	#define NAND_ROW_CYCLE 3
+#elif (JZ4740_NANDBOOT_CFG == JZ4740_NANDBOOT_B16R2)
+	#define NAND_BUS_WIDTH 16
+	#define NAND_ROW_CYCLE 2
+#endif
+
+/*
+ * NAND flash parameters
+ */
+static int page_size = 2048;
+static int oob_size = 64;
+static int ecc_count = 4;
+static int page_per_block = 64;
+static int bad_block_pos = 0;
+static int block_size = 131072;
+
+static unsigned char oob_buf[128] = {0};
+
+/*
+ * External routines
+ */
+extern void flush_cache_all(void);
+extern int serial_init(void);
+extern void serial_puts(const char *s);
+extern void sdram_init(void);
+extern void pll_init(void);
+extern void usb_boot();
+
+/*
+ * NAND flash routines
+ */
+#if NAND_BUS_WIDTH == 16
+static inline void nand_read_buf16(void *buf, int count)
+{
+	int i;
+	u16 *p = (u16 *)buf;
+
+	for (i = 0; i < count; i += 2)
+		*p++ = __nand_data16();
+}
+#define nand_read_buf nand_read_buf16
+
+#elif NAND_BUS_WIDTH == 8
+static inline void nand_read_buf8(void *buf, int count)
+{
+	int i;
+	u8 *p = (u8 *)buf;
+
+	for (i = 0; i < count; i++)
+		*p++ = __nand_data8();
+}
+#define nand_read_buf nand_read_buf8
+
+#endif
+
+/* Correct 1~9-bit errors in 512-bytes data */
+static void rs_correct(unsigned char *dat, int idx, int mask)
+{
+	int i;
+
+	idx--;
+
+	i = idx + (idx >> 3);
+	if (i >= 512)
+		return;
+
+	mask <<= (idx & 0x7);
+
+	dat[i] ^= mask & 0xff;
+	if (i < 511)
+		dat[i+1] ^= (mask >> 8) & 0xff;
+}
+
+static int nand_read_oob(int page_addr, uchar *buf, int size)
+{
+	int col_addr;
+	if (page_size != 512)
+		col_addr = page_size;
+	else {
+		col_addr = 0;
+		__nand_dev_ready();
+	}
+
+	if (page_size != 512)
+		/* Send READ0 command */
+		__nand_cmd(NAND_CMD_READ0);
+	else
+		/* Send READOOB command */
+		__nand_cmd(NAND_CMD_READOOB);
+
+	/* Send column address */
+	__nand_addr(col_addr & 0xff);
+	if (page_size != 512)
+		__nand_addr((col_addr >> 8) & 0xff);
+
+	/* Send page address */
+	__nand_addr(page_addr & 0xff);
+	__nand_addr((page_addr >> 8) & 0xff);
+	#ifdef NAND_ROW_CYCLE == 3
+		__nand_addr((page_addr >> 16) & 0xff);
+	#endif
+
+	/* Send READSTART command for 2048 or 4096 ps NAND */
+	if (page_size != 512)
+		__nand_cmd(NAND_CMD_READSTART);
+
+	/* Wait for device ready */
+	__nand_dev_ready();
+
+	/* Read oob data */
+	nand_read_buf(buf, size);
+	if (page_size == 512)
+		__nand_dev_ready();
+	return 0;
+}
+
+static int nand_read_page(int page_addr, uchar *dst, uchar *oobbuf)
+{
+	uchar *databuf = dst, *tmpbuf;
+	int i, j;
+
+	/*
+	 * Read oob data
+	 */
+	nand_read_oob(page_addr, oobbuf, oob_size);
+
+	/*
+	 * Read page data
+	 */
+
+	/* Send READ0 command */
+	__nand_cmd(NAND_CMD_READ0);
+
+	/* Send column address */
+	__nand_addr(0);
+	if (page_size != 512)
+		__nand_addr(0);
+
+	/* Send page address */
+	__nand_addr(page_addr & 0xff);
+	__nand_addr((page_addr >> 8) & 0xff);
+	#if NAND_ROW_CYCLE == 3
+		__nand_addr((page_addr >> 16) & 0xff);
+	#endif
+
+	/* Send READSTART command for 2048 or 4096 ps NAND */
+	if (page_size != 512)
+		__nand_cmd(NAND_CMD_READSTART);
+
+	/* Wait for device ready */
+	__nand_dev_ready();
+
+	/* Read page data */
+	tmpbuf = databuf;
+
+	for (i = 0; i < ecc_count; i++) {
+		volatile unsigned char *paraddr = (volatile unsigned char *)EMC_NFPAR0;
+		unsigned int stat;
+
+		/* Enable RS decoding */
+		REG_EMC_NFINTS = 0x0;
+		__nand_ecc_rs_decoding();
+
+		/* Read data */
+		nand_read_buf((void *)tmpbuf, ECC_BLOCK);
+
+		/* Set PAR values */
+		for (j = 0; j < PAR_SIZE; j++) {
+#if defined(CONFIG_SYS_NAND_ECC_POS)
+			*paraddr++ = oobbuf[CONFIG_SYS_NAND_ECC_POS + i*PAR_SIZE + j];
+#else
+			*paraddr++ = oobbuf[ECC_POS + i*PAR_SIZE + j];
+#endif
+		}
+
+		/* Set PRDY */
+		REG_EMC_NFECR |= EMC_NFECR_PRDY;
+
+		/* Wait for completion */
+		__nand_ecc_decode_sync();
+
+		/* Disable decoding */
+		__nand_ecc_disable();
+
+		/* Check result of decoding */
+		stat = REG_EMC_NFINTS;
+		if (stat & EMC_NFINTS_ERR) {
+			/* Error occurred */
+			/* serial_puts("\n Error occurred\n"); */
+			if (stat & EMC_NFINTS_UNCOR) {
+				/* Uncorrectable error occurred */
+				/* serial_puts("\nUncorrectable error occurred\n"); */
+			}
+			else {
+				unsigned int errcnt, index, mask;
+
+				errcnt = (stat & EMC_NFINTS_ERRCNT_MASK) >> EMC_NFINTS_ERRCNT_BIT;
+				switch (errcnt) {
+				case 4:
+					index = (REG_EMC_NFERR3 & EMC_NFERR_INDEX_MASK) >> EMC_NFERR_INDEX_BIT;
+					mask = (REG_EMC_NFERR3 & EMC_NFERR_MASK_MASK) >> EMC_NFERR_MASK_BIT;
+					rs_correct(tmpbuf, index, mask);
+					/* FALL-THROUGH */
+				case 3:
+					index = (REG_EMC_NFERR2 & EMC_NFERR_INDEX_MASK) >> EMC_NFERR_INDEX_BIT;
+					mask = (REG_EMC_NFERR2 & EMC_NFERR_MASK_MASK) >> EMC_NFERR_MASK_BIT;
+					rs_correct(tmpbuf, index, mask);
+					/* FALL-THROUGH */
+				case 2:
+					index = (REG_EMC_NFERR1 & EMC_NFERR_INDEX_MASK) >> EMC_NFERR_INDEX_BIT;
+					mask = (REG_EMC_NFERR1 & EMC_NFERR_MASK_MASK) >> EMC_NFERR_MASK_BIT;
+					rs_correct(tmpbuf, index, mask);
+					/* FALL-THROUGH */
+				case 1:
+					index = (REG_EMC_NFERR0 & EMC_NFERR_INDEX_MASK) >> EMC_NFERR_INDEX_BIT;
+					mask = (REG_EMC_NFERR0 & EMC_NFERR_MASK_MASK) >> EMC_NFERR_MASK_BIT;
+					rs_correct(tmpbuf, index, mask);
+					break;
+				default:
+					break;
+				}
+			}
+		}
+
+		tmpbuf += ECC_BLOCK;
+	}
+
+	return 0;
+}
+
+#ifndef CONFIG_SYS_NAND_BADBLOCK_PAGE
+#define CONFIG_SYS_NAND_BADBLOCK_PAGE 0 /* NAND bad block was marked at this page in a block, starting from 0 */
+#endif
+
+static void nand_load(int offs, int uboot_size, uchar *dst)
+{
+	int page;
+	int pagecopy_count;
+
+	__nand_enable();
+
+	page = offs / page_size;
+	pagecopy_count = 0;
+	while (pagecopy_count < (uboot_size / page_size)) {
+		if (page % page_per_block == 0) {
+			nand_read_oob(page + CONFIG_SYS_NAND_BADBLOCK_PAGE, oob_buf, oob_size);
+			if (oob_buf[bad_block_pos] != 0xff) {
+				page += page_per_block;
+				/* Skip bad block */
+				continue;
+			}
+		}
+		/* Load this page to dst, do the ECC */
+		nand_read_page(page, dst, oob_buf);
+
+		dst += page_size;
+		page++;
+		pagecopy_count++;
+	}
+
+	__nand_disable();
+}
+
+static void jz_nand_init(void) {
+
+ 	/* Optimize the timing of nand */
+	REG_EMC_SMCR1 = 0x094c4400;
+}
+
+static void gpio_init(void)
+{
+	/*
+	 * Initialize SDRAM pins
+	 */
+#if defined(CONFIG_JZ4720)
+	__gpio_as_sdram_16bit_4720();
+#elif defined(CONFIG_JZ4725)
+	__gpio_as_sdram_16bit_4725();
+#else
+	__gpio_as_sdram_32bit();
+#endif
+
+	/*
+	 * Initialize UART0 pins
+	 */
+	__gpio_as_uart0();
+}
+
+static int is_usb_boot()
+{
+ 	int keyU = 0;
+
+ 	__gpio_as_input(KEY_U_IN);
+ 	__gpio_enable_pull(KEY_U_IN);
+
+ 	__gpio_as_output(KEY_U_OUT);
+ 	__gpio_clear_pin(KEY_U_OUT);
+
+ 	keyU = __gpio_get_pin(KEY_U_IN);
+
+ 	if (keyU)
+ 		serial_puts("[U] not pressed\n");
+ 	else
+ 		serial_puts("[U] pressed\n");
+
+	return !keyU;
+}
+
+void nand_boot(void)
+{
+	void (*uboot)(void);
+
+	/*
+	 * Init hardware
+	 */
+	jz_nand_init();
+	gpio_init();
+	serial_init();
+
+	serial_puts("\n\nNAND Secondary Program Loader\n\n");
+
+	pll_init();
+	sdram_init();
+
+#if defined(CONFIG_NANONOTE)
+	if(is_usb_boot()) {
+		serial_puts("enter USB BOOT mode\n");
+		usb_boot();
+	}
+#endif
+
+	page_size = CONFIG_SYS_NAND_PAGE_SIZE;
+	block_size = CONFIG_SYS_NAND_BLOCK_SIZE;
+	page_per_block = CONFIG_SYS_NAND_BLOCK_SIZE / CONFIG_SYS_NAND_PAGE_SIZE;
+	bad_block_pos = (page_size == 512) ? 5 : 0;
+	oob_size = page_size / 32;
+	ecc_count = page_size / ECC_BLOCK;
+
+	/*
+	 * Load U-Boot image from NAND into RAM
+	 */
+	nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
+		  (uchar *)CONFIG_SYS_NAND_U_BOOT_DST);
+
+	uboot = (void (*)(void))CONFIG_SYS_NAND_U_BOOT_START;
+
+	serial_puts("Starting U-Boot ...\n");
+
+	/*
+	 * Flush caches
+	 */
+	flush_cache_all();
+
+	/*
+	 * Jump to U-Boot image
+	 */
+	(*uboot)();
+}