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@@ -1,558 +0,0 @@
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-/*
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- * (C) Copyright 2006 DENX Software Engineering
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- *
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- * See file CREDITS for list of people who contributed to this
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- * project.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation; either version 2 of
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- * the License, or (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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- * MA 02111-1307 USA
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- */
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-
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-#include <common.h>
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-
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-#if defined(CONFIG_CMD_NAND)
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-
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-#include <nand.h>
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-#include <asm/arch/pxa-regs.h>
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-#include <asm/io.h>
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-
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-#ifdef CONFIG_SYS_DFC_DEBUG1
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-# define DFC_DEBUG1(fmt, args...) printf(fmt, ##args)
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-#else
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-# define DFC_DEBUG1(fmt, args...)
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-#endif
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-
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-#ifdef CONFIG_SYS_DFC_DEBUG2
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-# define DFC_DEBUG2(fmt, args...) printf(fmt, ##args)
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-#else
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-# define DFC_DEBUG2(fmt, args...)
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-#endif
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-
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-#ifdef CONFIG_SYS_DFC_DEBUG3
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-# define DFC_DEBUG3(fmt, args...) printf(fmt, ##args)
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-#else
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-# define DFC_DEBUG3(fmt, args...)
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-#endif
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-
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-/* These really don't belong here, as they are specific to the NAND Model */
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-static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
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-
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-static struct nand_bbt_descr delta_bbt_descr = {
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- .options = 0,
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- .offs = 0,
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- .len = 2,
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- .pattern = scan_ff_pattern
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-};
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-
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-static struct nand_ecclayout delta_oob = {
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- .eccbytes = 6,
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- .eccpos = {2, 3, 4, 5, 6, 7},
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- .oobfree = { {8, 2}, {12, 4} }
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-};
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-
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-/*
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- * not required for Monahans DFC
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- */
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-static void dfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
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-{
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- return;
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-}
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-
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-#if 0
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-/* read device ready pin */
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-static int dfc_device_ready(struct mtd_info *mtdinfo)
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-{
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- if(NDSR & NDSR_RDY)
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- return 1;
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- else
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- return 0;
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- return 0;
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-}
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-#endif
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-
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-/*
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- * Write buf to the DFC Controller Data Buffer
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- */
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-static void dfc_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
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-{
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- unsigned long bytes_multi = len & 0xfffffffc;
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- unsigned long rest = len & 0x3;
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- unsigned long *long_buf;
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- int i;
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-
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- DFC_DEBUG2("dfc_write_buf: writing %d bytes starting with 0x%x.\n", len, *((unsigned long*) buf));
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- if(bytes_multi) {
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- for(i=0; i<bytes_multi; i+=4) {
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- long_buf = (unsigned long*) &buf[i];
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- writel(*long_buf, NDDB);
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- }
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- }
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- if(rest) {
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- printf("dfc_write_buf: ERROR, writing non 4-byte aligned data.\n");
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- }
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- return;
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-}
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-
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-
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-static void dfc_read_buf(struct mtd_info *mtd, u_char* const buf, int len)
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-{
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- int i=0, j;
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-
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- /* we have to be carefull not to overflow the buffer if len is
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- * not a multiple of 4 */
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- unsigned long bytes_multi = len & 0xfffffffc;
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- unsigned long rest = len & 0x3;
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- unsigned long *long_buf;
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-
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- DFC_DEBUG3("dfc_read_buf: reading %d bytes.\n", len);
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- /* if there are any, first copy multiple of 4 bytes */
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- if(bytes_multi) {
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- for(i=0; i<bytes_multi; i+=4) {
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- long_buf = (unsigned long*) &buf[i];
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- *long_buf = readl(NDDB);
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- }
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- }
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-
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- /* ...then the rest */
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- if(rest) {
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- unsigned long rest_data = NDDB;
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- for(j=0;j<rest; j++)
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- buf[i+j] = (u_char) ((rest_data>>j) & 0xff);
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- }
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-
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- return;
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-}
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-
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-/*
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- * read a word. Not implemented as not used in NAND code.
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- */
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-static u16 dfc_read_word(struct mtd_info *mtd)
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-{
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- printf("dfc_read_word: UNIMPLEMENTED.\n");
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- return 0;
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-}
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-
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-/* global var, too bad: mk@tbd: move to ->priv pointer */
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-static unsigned long read_buf = 0;
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-static int bytes_read = -1;
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-
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-/*
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- * read a byte from NDDB Because we can only read 4 bytes from NDDB at
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- * a time, we buffer the remaining bytes. The buffer is reset when a
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- * new command is sent to the chip.
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- *
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- * WARNING:
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- * This function is currently only used to read status and id
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- * bytes. For these commands always 8 bytes need to be read from
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- * NDDB. So we read and discard these bytes right now. In case this
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- * function is used for anything else in the future, we must check
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- * what was the last command issued and read the appropriate amount of
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- * bytes respectively.
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- */
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-static u_char dfc_read_byte(struct mtd_info *mtd)
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-{
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- unsigned char byte;
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- unsigned long dummy;
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-
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- if(bytes_read < 0) {
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- read_buf = readl(NDDB);
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- dummy = readl(NDDB);
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- bytes_read = 0;
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- }
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- byte = (unsigned char) (read_buf>>(8 * bytes_read++));
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- if(bytes_read >= 4)
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- bytes_read = -1;
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-
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- DFC_DEBUG2("dfc_read_byte: byte %u: 0x%x of (0x%x).\n", bytes_read - 1, byte, read_buf);
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- return byte;
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-}
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-
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-/* calculate delta between OSCR values start and now */
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-static unsigned long get_delta(unsigned long start)
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-{
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- unsigned long cur = readl(OSCR);
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-
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- if(cur < start) /* OSCR overflowed */
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- return (cur + (start^0xffffffff));
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- else
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- return (cur - start);
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-}
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-
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-/* delay function, this doesn't belong here */
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-static void wait_us(unsigned long us)
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-{
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- unsigned long start = readl(OSCR);
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- us = DIV_ROUND_UP(us * OSCR_CLK_FREQ, 1000);
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-
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- while (get_delta(start) < us) {
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- /* do nothing */
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- }
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-}
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-
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-static void dfc_clear_nddb(void)
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-{
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- writel(readl(NDCR) & ~NDCR_ND_RUN, NDCR);
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- wait_us(CONFIG_SYS_NAND_OTHER_TO);
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-}
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-
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-/* wait_event with timeout */
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-static unsigned long dfc_wait_event(unsigned long event)
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-{
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- unsigned long ndsr, timeout, start = readl(OSCR);
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-
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- if(!event)
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- return 0xff000000;
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- else if(event & (NDSR_CS0_CMDD | NDSR_CS0_BBD))
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- timeout = DIV_ROUND_UP(CONFIG_SYS_NAND_PROG_ERASE_TO
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- * OSCR_CLK_FREQ, 1000);
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- else
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- timeout = DIV_ROUND_UP(CONFIG_SYS_NAND_OTHER_TO
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- * OSCR_CLK_FREQ, 1000);
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-
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- while(1) {
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- ndsr = readl(NDSR);
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- if(ndsr & event) {
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- writel(readl(NDSR) | event, NDSR);
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- break;
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- }
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- if(get_delta(start) > timeout) {
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- DFC_DEBUG1("dfc_wait_event: TIMEOUT waiting for event: 0x%lx.\n", event);
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- return 0xff000000;
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- }
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-
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- }
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- return ndsr;
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-}
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-
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-/* we don't always wan't to do this */
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-static void dfc_new_cmd(void)
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-{
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- int retry = 0;
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- unsigned long status;
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-
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- while(retry++ <= CONFIG_SYS_NAND_SENDCMD_RETRY) {
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- /* Clear NDSR */
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- writel(0xfff, NDSR);
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-
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- /* set NDCR[NDRUN] */
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- if (!(readl(NDCR) & NDCR_ND_RUN))
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- writel(readl(NDCR) | NDCR_ND_RUN, NDCR);
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-
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- status = dfc_wait_event(NDSR_WRCMDREQ);
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-
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- if(status & NDSR_WRCMDREQ)
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- return;
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-
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- DFC_DEBUG2("dfc_new_cmd: FAILED to get WRITECMDREQ, retry: %d.\n", retry);
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- dfc_clear_nddb();
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- }
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- DFC_DEBUG1("dfc_new_cmd: giving up after %d retries.\n", retry);
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-}
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-
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-/* this function is called after Programm and Erase Operations to
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- * check for success or failure */
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-static int dfc_wait(struct mtd_info *mtd, struct nand_chip *this)
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-{
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- unsigned long ndsr=0, event=0;
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- int state = this->state;
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-
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- if(state == FL_WRITING) {
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- event = NDSR_CS0_CMDD | NDSR_CS0_BBD;
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- } else if(state == FL_ERASING) {
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- event = NDSR_CS0_CMDD | NDSR_CS0_BBD;
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- }
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-
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- ndsr = dfc_wait_event(event);
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-
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- if((ndsr & NDSR_CS0_BBD) || (ndsr & 0xff000000))
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- return(0x1); /* Status Read error */
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- return 0;
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-}
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-
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-/* cmdfunc send commands to the DFC */
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-static void dfc_cmdfunc(struct mtd_info *mtd, unsigned command,
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- int column, int page_addr)
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-{
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- /* register struct nand_chip *this = mtd->priv; */
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- unsigned long ndcb0=0, ndcb1=0, ndcb2=0, event=0;
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-
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- /* clear the ugly byte read buffer */
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- bytes_read = -1;
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- read_buf = 0;
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-
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- switch (command) {
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- case NAND_CMD_READ0:
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- DFC_DEBUG3("dfc_cmdfunc: NAND_CMD_READ0, page_addr: 0x%x, column: 0x%x.\n", page_addr, (column>>1));
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- dfc_new_cmd();
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- ndcb0 = (NAND_CMD_READ0 | (4<<16));
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- column >>= 1; /* adjust for 16 bit bus */
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- ndcb1 = (((column>>1) & 0xff) |
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- ((page_addr<<8) & 0xff00) |
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- ((page_addr<<8) & 0xff0000) |
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- ((page_addr<<8) & 0xff000000)); /* make this 0x01000000 ? */
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- event = NDSR_RDDREQ;
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- goto write_cmd;
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- case NAND_CMD_READ1:
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- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_READ1 unimplemented!\n");
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- goto end;
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- case NAND_CMD_READOOB:
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- DFC_DEBUG1("dfc_cmdfunc: NAND_CMD_READOOB unimplemented!\n");
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- goto end;
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- case NAND_CMD_READID:
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- dfc_new_cmd();
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- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_READID.\n");
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- ndcb0 = (NAND_CMD_READID | (3 << 21) | (1 << 16)); /* addr cycles*/
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- event = NDSR_RDDREQ;
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- goto write_cmd;
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- case NAND_CMD_PAGEPROG:
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- /* sent as a multicommand in NAND_CMD_SEQIN */
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- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_PAGEPROG empty due to multicmd.\n");
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- goto end;
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- case NAND_CMD_ERASE1:
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- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_ERASE1, page_addr: 0x%x, column: 0x%x.\n", page_addr, (column>>1));
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- dfc_new_cmd();
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- ndcb0 = (0xd060 | (1<<25) | (2<<21) | (1<<19) | (3<<16));
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- ndcb1 = (page_addr & 0x00ffffff);
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- goto write_cmd;
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- case NAND_CMD_ERASE2:
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- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_ERASE2 empty due to multicmd.\n");
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- goto end;
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- case NAND_CMD_SEQIN:
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- /* send PAGE_PROG command(0x1080) */
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- dfc_new_cmd();
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- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_SEQIN/PAGE_PROG, page_addr: 0x%x, column: 0x%x.\n", page_addr, (column>>1));
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- ndcb0 = (0x1080 | (1<<25) | (1<<21) | (1<<19) | (4<<16));
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- column >>= 1; /* adjust for 16 bit bus */
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- ndcb1 = (((column>>1) & 0xff) |
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- ((page_addr<<8) & 0xff00) |
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- ((page_addr<<8) & 0xff0000) |
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- ((page_addr<<8) & 0xff000000)); /* make this 0x01000000 ? */
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- event = NDSR_WRDREQ;
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- goto write_cmd;
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- case NAND_CMD_STATUS:
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- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_STATUS.\n");
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- dfc_new_cmd();
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- ndcb0 = NAND_CMD_STATUS | (4<<21);
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- event = NDSR_RDDREQ;
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- goto write_cmd;
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- case NAND_CMD_RESET:
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- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_RESET.\n");
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- ndcb0 = NAND_CMD_RESET | (5<<21);
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- event = NDSR_CS0_CMDD;
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- goto write_cmd;
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- default:
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- printk("dfc_cmdfunc: error, unsupported command.\n");
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- goto end;
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- }
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-
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- write_cmd:
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- writel(ndcb0, NDCB0);
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- writel(ndcb1, NDCB0);
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- writel(ndcb2, NDCB0);
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-
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- /* wait_event: */
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- dfc_wait_event(event);
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- end:
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- return;
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-}
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-
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-static void dfc_gpio_init(void)
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-{
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- DFC_DEBUG2("Setting up DFC GPIO's.\n");
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-
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- /* no idea what is done here, see zylonite.c */
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- writel(0x1, GPIO4);
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-
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- writel(0x00000001, DF_ALE_nWE1);
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- writel(0x00000001, DF_ALE_nWE2);
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- writel(0x00000001, DF_nCS0);
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- writel(0x00000001, DF_nCS1);
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- writel(0x00000001, DF_nWE);
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- writel(0x00000001, DF_nRE);
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- writel(0x00000001, DF_IO0);
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- writel(0x00000001, DF_IO8);
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- writel(0x00000001, DF_IO1);
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- writel(0x00000001, DF_IO9);
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- writel(0x00000001, DF_IO2);
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- writel(0x00000001, DF_IO10);
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- writel(0x00000001, DF_IO3);
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- writel(0x00000001, DF_IO11);
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- writel(0x00000001, DF_IO4);
|
|
|
- writel(0x00000001, DF_IO12);
|
|
|
- writel(0x00000001, DF_IO5);
|
|
|
- writel(0x00000001, DF_IO13);
|
|
|
- writel(0x00000001, DF_IO6);
|
|
|
- writel(0x00000001, DF_IO14);
|
|
|
- writel(0x00000001, DF_IO7);
|
|
|
- writel(0x00000001, DF_IO15);
|
|
|
-
|
|
|
- writel(0x1901, DF_nWE);
|
|
|
- writel(0x1901, DF_nRE);
|
|
|
- writel(0x1900, DF_CLE_nOE);
|
|
|
- writel(0x1901, DF_ALE_nWE1);
|
|
|
- writel(0x1900, DF_INT_RnB);
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- * Board-specific NAND initialization. The following members of the
|
|
|
- * argument are board-specific (per include/linux/mtd/nand_new.h):
|
|
|
- * - IO_ADDR_R?: address to read the 8 I/O lines of the flash device
|
|
|
- * - IO_ADDR_W?: address to write the 8 I/O lines of the flash device
|
|
|
- * - hwcontrol: hardwarespecific function for accesing control-lines
|
|
|
- * - dev_ready: hardwarespecific function for accesing device ready/busy line
|
|
|
- * - enable_hwecc?: function to enable (reset) hardware ecc generator. Must
|
|
|
- * only be provided if a hardware ECC is available
|
|
|
- * - ecc.mode: mode of ecc, see defines
|
|
|
- * - chip_delay: chip dependent delay for transfering data from array to
|
|
|
- * read regs (tR)
|
|
|
- * - options: various chip options. They can partly be set to inform
|
|
|
- * nand_scan about special functionality. See the defines for further
|
|
|
- * explanation
|
|
|
- * Members with a "?" were not set in the merged testing-NAND branch,
|
|
|
- * so they are not set here either.
|
|
|
- */
|
|
|
-int board_nand_init(struct nand_chip *nand)
|
|
|
-{
|
|
|
- unsigned long tCH, tCS, tWH, tWP, tRH, tRP, tRP_high, tR, tWHR, tAR;
|
|
|
-
|
|
|
- /* set up GPIO Control Registers */
|
|
|
- dfc_gpio_init();
|
|
|
-
|
|
|
- /* turn on the NAND Controller Clock (104 MHz @ D0) */
|
|
|
- writel(readl(CKENA) | (CKENA_4_NAND | CKENA_9_SMC), CKENA);
|
|
|
-
|
|
|
-#undef CONFIG_SYS_TIMING_TIGHT
|
|
|
-#ifndef CONFIG_SYS_TIMING_TIGHT
|
|
|
- tCH = MIN(((unsigned long) (NAND_TIMING_tCH * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tCH);
|
|
|
- tCS = MIN(((unsigned long) (NAND_TIMING_tCS * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tCS);
|
|
|
- tWH = MIN(((unsigned long) (NAND_TIMING_tWH * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tWH);
|
|
|
- tWP = MIN(((unsigned long) (NAND_TIMING_tWP * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tWP);
|
|
|
- tRH = MIN(((unsigned long) (NAND_TIMING_tRH * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tRH);
|
|
|
- tRP = MIN(((unsigned long) (NAND_TIMING_tRP * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tRP);
|
|
|
- tR = MIN(((unsigned long) (NAND_TIMING_tR * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tR);
|
|
|
- tWHR = MIN(((unsigned long) (NAND_TIMING_tWHR * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tWHR);
|
|
|
- tAR = MIN(((unsigned long) (NAND_TIMING_tAR * DFC_CLK_PER_US) + 1),
|
|
|
- DFC_MAX_tAR);
|
|
|
-#else /* this is the tight timing */
|
|
|
-
|
|
|
- tCH = MIN(((unsigned long) (NAND_TIMING_tCH * DFC_CLK_PER_US)),
|
|
|
- DFC_MAX_tCH);
|
|
|
- tCS = MIN(((unsigned long) (NAND_TIMING_tCS * DFC_CLK_PER_US)),
|
|
|
- DFC_MAX_tCS);
|
|
|
- tWH = MIN(((unsigned long) (NAND_TIMING_tWH * DFC_CLK_PER_US)),
|
|
|
- DFC_MAX_tWH);
|
|
|
- tWP = MIN(((unsigned long) (NAND_TIMING_tWP * DFC_CLK_PER_US)),
|
|
|
- DFC_MAX_tWP);
|
|
|
- tRH = MIN(((unsigned long) (NAND_TIMING_tRH * DFC_CLK_PER_US)),
|
|
|
- DFC_MAX_tRH);
|
|
|
- tRP = MIN(((unsigned long) (NAND_TIMING_tRP * DFC_CLK_PER_US)),
|
|
|
- DFC_MAX_tRP);
|
|
|
- tR = MIN(((unsigned long) (NAND_TIMING_tR * DFC_CLK_PER_US) - tCH - 2),
|
|
|
- DFC_MAX_tR);
|
|
|
- tWHR = MIN(((unsigned long) (NAND_TIMING_tWHR * DFC_CLK_PER_US) - tCH - 2),
|
|
|
- DFC_MAX_tWHR);
|
|
|
- tAR = MIN(((unsigned long) (NAND_TIMING_tAR * DFC_CLK_PER_US) - 2),
|
|
|
- DFC_MAX_tAR);
|
|
|
-#endif /* CONFIG_SYS_TIMING_TIGHT */
|
|
|
-
|
|
|
-
|
|
|
- DFC_DEBUG2("tCH=%u, tCS=%u, tWH=%u, tWP=%u, tRH=%u, tRP=%u, tR=%u, tWHR=%u, tAR=%u.\n", tCH, tCS, tWH, tWP, tRH, tRP, tR, tWHR, tAR);
|
|
|
-
|
|
|
- /* tRP value is split in the register */
|
|
|
- if(tRP & (1 << 4)) {
|
|
|
- tRP_high = 1;
|
|
|
- tRP &= ~(1 << 4);
|
|
|
- } else {
|
|
|
- tRP_high = 0;
|
|
|
- }
|
|
|
-
|
|
|
- writel((tCH << 19) |
|
|
|
- (tCS << 16) |
|
|
|
- (tWH << 11) |
|
|
|
- (tWP << 8) |
|
|
|
- (tRP_high << 6) |
|
|
|
- (tRH << 3) |
|
|
|
- (tRP << 0),
|
|
|
- NDTR0CS0);
|
|
|
-
|
|
|
- writel((tR << 16) |
|
|
|
- (tWHR << 4) |
|
|
|
- (tAR << 0),
|
|
|
- NDTR1CS0);
|
|
|
-
|
|
|
- /* If it doesn't work (unlikely) think about:
|
|
|
- * - ecc enable
|
|
|
- * - chip select don't care
|
|
|
- * - read id byte count
|
|
|
- *
|
|
|
- * Intentionally enabled by not setting bits:
|
|
|
- * - dma (DMA_EN)
|
|
|
- * - page size = 512
|
|
|
- * - cs don't care, see if we can enable later!
|
|
|
- * - row address start position (after second cycle)
|
|
|
- * - pages per block = 32
|
|
|
- * - ND_RDY : clears command buffer
|
|
|
- */
|
|
|
- /* NDCR_NCSX | /\* Chip select busy don't care *\/ */
|
|
|
-
|
|
|
- writel(NDCR_SPARE_EN | /* use the spare area */
|
|
|
- NDCR_DWIDTH_C | /* 16bit DFC data bus width */
|
|
|
- NDCR_DWIDTH_M | /* 16 bit Flash device data bus width */
|
|
|
- (2 << 16) | /* read id count = 7 ???? mk@tbd */
|
|
|
- NDCR_ND_ARB_EN | /* enable bus arbiter */
|
|
|
- NDCR_RDYM | /* flash device ready ir masked */
|
|
|
- NDCR_CS0_PAGEDM | /* ND_nCSx page done ir masked */
|
|
|
- NDCR_CS1_PAGEDM |
|
|
|
- NDCR_CS0_CMDDM | /* ND_CSx command done ir masked */
|
|
|
- NDCR_CS1_CMDDM |
|
|
|
- NDCR_CS0_BBDM | /* ND_CSx bad block detect ir masked */
|
|
|
- NDCR_CS1_BBDM |
|
|
|
- NDCR_DBERRM | /* double bit error ir masked */
|
|
|
- NDCR_SBERRM | /* single bit error ir masked */
|
|
|
- NDCR_WRDREQM | /* write data request ir masked */
|
|
|
- NDCR_RDDREQM | /* read data request ir masked */
|
|
|
- NDCR_WRCMDREQM, /* write command request ir masked */
|
|
|
- NDCR);
|
|
|
-
|
|
|
-
|
|
|
- /* wait 10 us due to cmd buffer clear reset */
|
|
|
- /* wait(10); */
|
|
|
-
|
|
|
-
|
|
|
- nand->cmd_ctrl = dfc_hwcontrol;
|
|
|
-/* nand->dev_ready = dfc_device_ready; */
|
|
|
- nand->ecc.mode = NAND_ECC_SOFT;
|
|
|
- nand->ecc.layout = &delta_oob;
|
|
|
- nand->options = NAND_BUSWIDTH_16;
|
|
|
- nand->waitfunc = dfc_wait;
|
|
|
- nand->read_byte = dfc_read_byte;
|
|
|
- nand->read_word = dfc_read_word;
|
|
|
- nand->read_buf = dfc_read_buf;
|
|
|
- nand->write_buf = dfc_write_buf;
|
|
|
-
|
|
|
- nand->cmdfunc = dfc_cmdfunc;
|
|
|
- nand->badblock_pattern = &delta_bbt_descr;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-#endif
|