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-rw-r--r--drivers/k9f1g08r0a.c350
1 files changed, 350 insertions, 0 deletions
diff --git a/drivers/k9f1g08r0a.c b/drivers/k9f1g08r0a.c
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+/*
+ * (C) Copyright 2004 Texas Instruments
+ * Jian Zhang <jzhang@ti.com>
+ *
+ * Samsung K9F1G08R0AQ0C NAND chip driver for an OMAP2420 board
+ *
+ * This file is based on the following u-boot file:
+ * common/cmd_nand.c
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <asm/arch/sys_proto.h>
+#include <asm/arch/sys_info.h>
+
+#ifdef CFG_NAND_K9F1G08R0A
+
+#define K9F1G08R0A_MFR 0xec /* Samsung */
+#define K9F1G08R0A_ID 0xa1 /* part # */
+
+/* Since Micron and Samsung parts are similar in geometry and bus width
+ * we can use the same driver. Need to revisit to make this file independent
+ * of part/manufacturer
+ */
+#define MT29F1G_MFR 0x2c /* Micron */
+#define MT29F1G_MFR2 0x20 /* numonyx */
+#define MT29F1G_MFR3 0xad /* Hynix */
+#define MT29F1G_ID 0xa1 /* x8, 1GiB */
+#define MT29F2G_ID 0xba /* x16, 2GiB */
+#define MT29F4G_ID 0xbc /* x16, 4GiB */
+
+#define ADDR_COLUMN 1
+#define ADDR_PAGE 2
+#define ADDR_COLUMN_PAGE (ADDR_COLUMN | ADDR_PAGE)
+
+#define ADDR_OOB (0x4 | ADDR_COLUMN_PAGE)
+
+#define PAGE_SIZE 2048
+#define OOB_SIZE 64
+#define MAX_NUM_PAGES 64
+
+#define ECC_CHECK_ENABLE
+#define ECC_SIZE 24
+#define ECC_STEPS 3
+
+/*******************************************************
+ * Routine: delay
+ * Description: spinning delay to use before udelay works
+ ******************************************************/
+static inline void delay (unsigned long loops)
+{
+ __asm__ volatile ("1:\n"
+ "subs %0, %0, #1\n"
+ "bne 1b":"=r" (loops):"0" (loops));
+}
+
+static int nand_read_page(u_char *buf, ulong page_addr);
+static int nand_read_oob(u_char * buf, ulong page_addr);
+
+/* JFFS2 large page layout for 3-byte ECC per 256 bytes ECC layout */
+/* This is the only SW ECC supported by u-boot. So to load u-boot
+ * this should be supported */
+static u_char ecc_pos[] =
+ {40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63};
+static u_char eccvalid_pos = 4;
+
+static unsigned long chipsize = (256 << 20);
+
+#ifdef NAND_16BIT
+static int bus_width = 16;
+#else
+static int bus_width = 8;
+#endif
+
+/* NanD_Command: Send a flash command to the flash chip */
+static int NanD_Command(unsigned char command)
+{
+ NAND_CTL_SETCLE(NAND_ADDR);
+
+ WRITE_NAND_COMMAND(command, NAND_ADDR);
+ NAND_CTL_CLRCLE(NAND_ADDR);
+
+ if(command == NAND_CMD_RESET){
+ unsigned char ret_val;
+ NanD_Command(NAND_CMD_STATUS);
+ do{
+ ret_val = READ_NAND(NAND_ADDR);/* wait till ready */
+ } while((ret_val & 0x40) != 0x40);
+ }
+
+ NAND_WAIT_READY();
+ return 0;
+}
+
+
+/* NanD_Address: Set the current address for the flash chip */
+static int NanD_Address(unsigned int numbytes, unsigned long ofs)
+{
+ uchar u;
+
+ NAND_CTL_SETALE(NAND_ADDR);
+
+ if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE
+ || numbytes == ADDR_OOB)
+ {
+ ushort col = ofs;
+
+ u = col & 0xff;
+ WRITE_NAND_ADDRESS(u, NAND_ADDR);
+
+ u = (col >> 8) & 0x07;
+ if (numbytes == ADDR_OOB)
+ u = u | ((bus_width == 16) ? (1 << 2) : (1 << 3));
+ WRITE_NAND_ADDRESS(u, NAND_ADDR);
+ }
+
+ if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE
+ || numbytes == ADDR_OOB)
+ {
+ u = (ofs >> 11) & 0xff;
+ WRITE_NAND_ADDRESS(u, NAND_ADDR);
+ u = (ofs >> 19) & 0xff;
+ WRITE_NAND_ADDRESS(u, NAND_ADDR);
+
+ /* One more address cycle for devices > 128MiB */
+ if (chipsize > (128 << 20)) {
+ u = (ofs >> 27) & 0xff;
+ WRITE_NAND_ADDRESS(u, NAND_ADDR);
+ }
+ }
+
+ NAND_CTL_CLRALE(NAND_ADDR);
+
+ NAND_WAIT_READY();
+ return 0;
+}
+
+int nand_readid(int *mfr, int *id)
+{
+ NAND_ENABLE_CE();
+
+ if (NanD_Command(NAND_CMD_RESET)) {
+ NAND_DISABLE_CE();
+ return 1;
+ }
+
+ if (NanD_Command(NAND_CMD_READID)) {
+ NAND_DISABLE_CE();
+ return 1;
+ }
+
+ NanD_Address(ADDR_COLUMN, 0);
+
+ *mfr = READ_NAND(NAND_ADDR);
+ *id = READ_NAND(NAND_ADDR);
+
+ NAND_DISABLE_CE();
+ return 0;
+}
+
+/* read chip mfr and id
+ * return 0 if they match board config
+ * return 1 if not
+ */
+int nand_chip()
+{
+ int mfr, id;
+
+ NAND_ENABLE_CE();
+
+ if (NanD_Command(NAND_CMD_RESET)) {
+ printf("Err: RESET\n");
+ NAND_DISABLE_CE();
+ return 1;
+ }
+
+ if (NanD_Command(NAND_CMD_READID)) {
+ printf("Err: READID\n");
+ NAND_DISABLE_CE();
+ return 1;
+ }
+
+ NanD_Address(ADDR_COLUMN, 0);
+
+ mfr = READ_NAND(NAND_ADDR);
+ id = READ_NAND(NAND_ADDR);
+
+ NAND_DISABLE_CE();
+
+ if (((mfr == MT29F1G_MFR || mfr == MT29F1G_MFR2 || mfr == MT29F1G_MFR3) &&
+ (id == MT29F1G_ID || id == MT29F2G_ID || id == MT29F4G_ID)) ||
+ (mfr == K9F1G08R0A_MFR && (id == K9F1G08R0A_ID))) {
+ return 0;
+ } else {
+ if ((mfr == 0) && (id == 0)) {
+ printf("No NAND detected\n");
+ return 0;
+ } else {
+ printf("Unknown chip: mfr was 0x%02x, id was 0x%02x\n", mfr, id);
+ return 1;
+ }
+ }
+}
+
+/* read a block data to buf
+ * return 1 if the block is bad or ECC error can't be corrected for any page
+ * return 0 on sucess
+ */
+int nand_read_block(unsigned char *buf, ulong block_addr)
+{
+ int i, offset = 0;
+
+#ifdef ECC_CHECK_ENABLE
+ u16 oob_buf[OOB_SIZE >> 1];
+
+ /* check bad block */
+ /* 0th word in spare area needs be 0xff */
+ if (nand_read_oob(oob_buf, block_addr) || (oob_buf[0] & 0xff) != 0xff){
+ printf("Skipped bad block at 0x%x\n", block_addr);
+ return 1; /* skip bad block */
+ }
+#endif
+ /* read the block page by page*/
+ for (i=0; i<MAX_NUM_PAGES; i++){
+ if (nand_read_page(buf+offset, block_addr + offset))
+ return 1;
+ offset += PAGE_SIZE;
+ }
+
+ return 0;
+}
+static count = 0;
+/* read a page with ECC */
+static int nand_read_page(u_char *buf, ulong page_addr)
+{
+#ifdef ECC_CHECK_ENABLE
+ u_char ecc_code[ECC_SIZE];
+ u_char ecc_calc[ECC_STEPS];
+ u_char oob_buf[OOB_SIZE];
+#endif
+ u16 val;
+ int cntr;
+ int len;
+
+#ifdef NAND_16BIT
+ u16 *p;
+#else
+ u_char *p;
+#endif
+
+ NAND_ENABLE_CE();
+ NanD_Command(NAND_CMD_READ0);
+ NanD_Address(ADDR_COLUMN_PAGE, page_addr);
+ NanD_Command(NAND_CMD_READSTART);
+ NAND_WAIT_READY();
+
+ /* A delay seems to be helping here. needs more investigation */
+ delay(10000);
+ len = (bus_width == 16) ? PAGE_SIZE >> 1 : PAGE_SIZE;
+ p = buf;
+ for (cntr = 0; cntr < len; cntr++){
+ *p++ = READ_NAND(NAND_ADDR);
+ delay(10);
+ }
+
+#ifdef ECC_CHECK_ENABLE
+ p = oob_buf;
+ len = (bus_width == 16) ? OOB_SIZE >> 1 : OOB_SIZE;
+ for (cntr = 0; cntr < len; cntr++){
+ *p++ = READ_NAND(NAND_ADDR);
+ delay(10);
+ }
+ count = 0;
+ NAND_DISABLE_CE(); /* set pin high */
+
+ /* Pick the ECC bytes out of the oob data */
+ for (cntr = 0; cntr < ECC_SIZE; cntr++)
+ ecc_code[cntr] = oob_buf[ecc_pos[cntr]];
+
+ for(count = 0; count < ECC_SIZE; count += ECC_STEPS) {
+ nand_calculate_ecc (buf, &ecc_calc[0]);
+ if (nand_correct_data (buf, &ecc_code[count], &ecc_calc[0]) == -1) {
+ printf ("ECC Failed, page 0x%08x\n", page_addr);
+ for (val=0; val <256; val++)
+ printf("%x ", buf[val]);
+ printf("\n");
+ for (;;);
+ return 1;
+ }
+ buf += 256;
+ page_addr += 256;
+ }
+#endif
+ return 0;
+}
+
+/* read from the 16 bytes of oob data that correspond to a 512 / 2048 byte page.
+ */
+static int nand_read_oob(u_char *buf, ulong page_addr)
+{
+ u16 val;
+ int cntr;
+ int len;
+
+#ifdef NAND_16BIT
+ u16 *p;
+#else
+ u_char *p;
+#endif
+ p = buf;
+ len = (bus_width == 16) ? OOB_SIZE >> 1 : OOB_SIZE;
+
+ NAND_ENABLE_CE(); /* set pin low */
+ NanD_Command(NAND_CMD_READ0);
+ NanD_Address(ADDR_OOB, page_addr);
+ NanD_Command(NAND_CMD_READSTART);
+ NAND_WAIT_READY();
+
+ /* A delay seems to be helping here. needs more investigation */
+ delay(10000);
+ for (cntr = 0; cntr < len; cntr++)
+ *p++ = READ_NAND(NAND_ADDR);
+
+ NAND_WAIT_READY();
+ NAND_DISABLE_CE(); /* set pin high */
+
+ return 0;
+}
+
+#endif