u-boot/board/mx1ads/syncflash.c

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/*
* board/mx1ads/syncflash.c
*
* (c) Copyright 2004
* Techware Information Technology, Inc.
* http://www.techware.com.tw/
*
* Ming-Len Wu <minglen_wu@techware.com.tw>
*
* 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 <mc9328.h>*/
#include <asm/arch/imx-regs.h>
typedef unsigned long * p_u32;
/* 4Mx16x2 IAM=0 CSD1 */
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
/* Following Setting is for CSD1 */
#define SFCTL 0x00221004
#define reg_SFCTL __REG(SFCTL)
#define SYNCFLASH_A10 (0x00100000)
#define CMD_NORMAL (0x81020300) /* Normal Mode */
#define CMD_PREC (CMD_NORMAL + 0x10000000) /* Precharge Command */
#define CMD_AUTO (CMD_NORMAL + 0x20000000) /* Auto Refresh Command */
#define CMD_LMR (CMD_NORMAL + 0x30000000) /* Load Mode Register Command */
#define CMD_LCR (CMD_NORMAL + 0x60000000) /* LCR Command */
#define CMD_PROGRAM (CMD_NORMAL + 0x70000000)
#define MODE_REG_VAL (CONFIG_SYS_FLASH_BASE+0x0008CC00) /* Cas Latency 3 */
/* LCR Command */
#define LCR_READSTATUS (0x0001C000) /* 0x70 */
#define LCR_ERASE_CONFIRM (0x00008000) /* 0x20 */
#define LCR_ERASE_NVMODE (0x0000C000) /* 0x30 */
#define LCR_PROG_NVMODE (0x00028000) /* 0xA0 */
#define LCR_SR_CLEAR (0x00014000) /* 0x50 */
/* Get Status register */
u32 SF_SR(void) {
u32 tmp;
reg_SFCTL = CMD_PROGRAM;
tmp = __REG(CONFIG_SYS_FLASH_BASE);
reg_SFCTL = CMD_NORMAL;
reg_SFCTL = CMD_LCR; /* Activate LCR Mode */
__REG(CONFIG_SYS_FLASH_BASE + LCR_SR_CLEAR);
return tmp;
}
/* check if SyncFlash is ready */
u8 SF_Ready(void) {
u32 tmp;
tmp = SF_SR();
if ((tmp & 0x00800000) && (tmp & 0x001C0000)) {
printf ("SyncFlash Error code %08x\n",tmp);
};
if ((tmp & 0x00000080) && (tmp & 0x0000001C)) {
printf ("SyncFlash Error code %08x\n",tmp);
};
if (tmp == 0x00800080) /* Test Bit 7 of SR */
return 1;
else
return 0;
}
/* Issue the precharge all command */
void SF_PrechargeAll(void) {
/* Set Precharge Command */
reg_SFCTL = CMD_PREC;
/* Issue Precharge All Command */
__REG(CONFIG_SYS_FLASH_BASE + SYNCFLASH_A10);
}
/* set SyncFlash to normal mode */
void SF_Normal(void) {
SF_PrechargeAll();
reg_SFCTL = CMD_NORMAL;
}
/* Erase SyncFlash */
void SF_Erase(u32 RowAddress) {
reg_SFCTL = CMD_NORMAL;
__REG(RowAddress);
reg_SFCTL = CMD_PREC;
__REG(RowAddress);
reg_SFCTL = CMD_LCR; /* Set LCR mode */
__REG(RowAddress + LCR_ERASE_CONFIRM) = 0; /* Issue Erase Setup Command */
reg_SFCTL = CMD_NORMAL; /* return to Normal mode */
__REG(RowAddress) = 0xD0D0D0D0; /* Confirm */
while(!SF_Ready());
}
void SF_NvmodeErase(void) {
SF_PrechargeAll();
reg_SFCTL = CMD_LCR; /* Set to LCR mode */
__REG(CONFIG_SYS_FLASH_BASE + LCR_ERASE_NVMODE) = 0; /* Issue Erase Nvmode Reg Command */
reg_SFCTL = CMD_NORMAL; /* Return to Normal mode */
__REG(CONFIG_SYS_FLASH_BASE + LCR_ERASE_NVMODE) = 0xC0C0C0C0; /* Confirm */
while(!SF_Ready());
}
void SF_NvmodeWrite(void) {
SF_PrechargeAll();
reg_SFCTL = CMD_LCR; /* Set to LCR mode */
__REG(CONFIG_SYS_FLASH_BASE+LCR_PROG_NVMODE) = 0; /* Issue Program Nvmode reg command */
reg_SFCTL = CMD_NORMAL; /* Return to Normal mode */
__REG(CONFIG_SYS_FLASH_BASE+LCR_PROG_NVMODE) = 0xC0C0C0C0; /* Confirm not needed */
}
/****************************************************************************************/
ulong flash_init(void) {
int i, j;
/* Turn on CSD1 for negating RESETSF of SyncFLash */
reg_SFCTL |= 0x80000000; /* enable CSD1 for SyncFlash */
udelay(200);
reg_SFCTL = CMD_LMR; /* Set Load Mode Register Command */
__REG(MODE_REG_VAL); /* Issue Load Mode Register Command */
SF_Normal();
i = 0;
flash_info[i].flash_id = FLASH_MAN_MT | FLASH_MT28S4M16LC;
flash_info[i].size = FLASH_BANK_SIZE;
flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
memset(flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
for (j = 0; j < flash_info[i].sector_count; j++) {
flash_info[i].start[j] = CONFIG_SYS_FLASH_BASE + j * 0x00100000;
}
flash_protect(FLAG_PROTECT_SET,
CONFIG_SYS_FLASH_BASE,
CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
&flash_info[0]);
flash_protect(FLAG_PROTECT_SET,
CONFIG_ENV_ADDR,
CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
&flash_info[0]);
return FLASH_BANK_SIZE;
}
void flash_print_info (flash_info_t *info) {
int i;
switch (info->flash_id & FLASH_VENDMASK) {
case (FLASH_MAN_MT & FLASH_VENDMASK):
printf("Micron: ");
break;
default:
printf("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case (FLASH_MT28S4M16LC & FLASH_TYPEMASK):
printf("2x FLASH_MT28S4M16LC (16MB Total)\n");
break;
default:
printf("Unknown Chip Type\n");
return;
break;
}
printf(" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
printf(" Sector Start Addresses: ");
for (i = 0; i < info->sector_count; i++) {
if ((i % 5) == 0)
printf ("\n ");
printf (" %08lX%s", info->start[i],
info->protect[i] ? " (RO)" : " ");
}
printf ("\n");
}
/*-----------------------------------------------------------------------*/
int flash_erase (flash_info_t *info, int s_first, int s_last) {
int iflag, cflag, prot, sect;
int rc = ERR_OK;
/* first look for protection bits */
if (info->flash_id == FLASH_UNKNOWN)
return ERR_UNKNOWN_FLASH_TYPE;
if ((s_first < 0) || (s_first > s_last))
return ERR_INVAL;
if ((info->flash_id & FLASH_VENDMASK) != (FLASH_MAN_MT & FLASH_VENDMASK))
return ERR_UNKNOWN_FLASH_VENDOR;
prot = 0;
for (sect = s_first; sect <= s_last; ++sect) {
if (info->protect[sect])
prot++;
}
if (prot) {
printf("protected!\n");
return ERR_PROTECTED;
}
/*
* Disable interrupts which might cause a timeout
* here. Remember that our exception vectors are
* at address 0 in the flash, and we don't want a
* (ticker) exception to happen while the flash
* chip is in programming mode.
*/
cflag = icache_status();
icache_disable();
iflag = disable_interrupts();
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last && !ctrlc(); sect++) {
printf("Erasing sector %2d ... ", sect);
/* arm simple, non interrupt dependent timer */
get_timer(0);
SF_NvmodeErase();
SF_NvmodeWrite();
SF_Erase(CONFIG_SYS_FLASH_BASE + (0x0100000 * sect));
SF_Normal();
printf("ok.\n");
}
if (ctrlc())
printf("User Interrupt!\n");
if (iflag)
enable_interrupts();
if (cflag)
icache_enable();
return rc;
}
/*-----------------------------------------------------------------------
* Copy memory to flash.
*/
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) {
int i;
for(i = 0; i < cnt; i += 4) {
SF_PrechargeAll();
reg_SFCTL = CMD_PROGRAM; /* Enter SyncFlash Program mode */
__REG(addr + i) = __REG((u32)src + i);
while(!SF_Ready());
}
SF_Normal();
return ERR_OK;
}