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-rw-r--r--board/ezkit533/flash.c476
1 files changed, 476 insertions, 0 deletions
diff --git a/board/ezkit533/flash.c b/board/ezkit533/flash.c
new file mode 100644
index 0000000..b0a0796
--- /dev/null
+++ b/board/ezkit533/flash.c
@@ -0,0 +1,476 @@
+/*
+ * U-boot - flash.c Flash driver for PSD4256GV
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ * This file is based on BF533EzFlash.c originally written by Analog Devices, Inc.
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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 "flash-defines.h"
+
+void flash_reset(void)
+{
+ reset_flash();
+}
+
+unsigned long flash_get_size(ulong baseaddr, flash_info_t * info,
+ int bank_flag)
+{
+ int id = 0, i = 0;
+ static int FlagDev = 1;
+
+ id = get_codes();
+ if(FlagDev) {
+#ifdef DEBUG
+ printf("Device ID of the Flash is %x\n", id);
+#endif
+ FlagDev = 0;
+ }
+ info->flash_id = id;
+
+ switch (bank_flag) {
+ case 0:
+ for (i = PriFlashABegin; i < SecFlashABegin; i++)
+ info->start[i] = (baseaddr + (i * AFP_SectorSize1));
+ info->size = 0x200000;
+ info->sector_count = 32;
+ break;
+ case 1:
+ info->start[0] = baseaddr + SecFlashASec1Off;
+ info->start[1] = baseaddr + SecFlashASec2Off;
+ info->start[2] = baseaddr + SecFlashASec3Off;
+ info->start[3] = baseaddr + SecFlashASec4Off;
+ info->size = 0x10000;
+ info->sector_count = 4;
+ break;
+ case 2:
+ info->start[0] = baseaddr + SecFlashBSec1Off;
+ info->start[1] = baseaddr + SecFlashBSec2Off;
+ info->start[2] = baseaddr + SecFlashBSec3Off;
+ info->start[3] = baseaddr + SecFlashBSec4Off;
+ info->size = 0x10000;
+ info->sector_count = 4;
+ break;
+ }
+ return (info->size);
+}
+
+unsigned long flash_init(void)
+{
+ unsigned long size_b0, size_b1, size_b2;
+ int i;
+
+ size_b0 = size_b1 = size_b2 = 0;
+#ifdef DEBUG
+ printf("Flash Memory Start 0x%x\n", CFG_FLASH_BASE);
+ printf("Memory Map for the Flash\n");
+ printf("0x20000000 - 0x200FFFFF Flash A Primary (1MB)\n");
+ printf("0x20100000 - 0x201FFFFF Flash B Primary (1MB)\n");
+ printf("0x20200000 - 0x2020FFFF Flash A Secondary (64KB)\n");
+ printf("0x20280000 - 0x2028FFFF Flash B Secondary (64KB)\n");
+ printf("Please type command flinfo for information on Sectors \n");
+#endif
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ size_b0 = flash_get_size(CFG_FLASH0_BASE, &flash_info[0], 0);
+ size_b1 = flash_get_size(CFG_FLASH0_BASE, &flash_info[1], 1);
+ size_b2 = flash_get_size(CFG_FLASH0_BASE, &flash_info[2], 2);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
+ printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+ size_b0, size_b0 >> 20);
+ }
+
+ (void)flash_protect(FLAG_PROTECT_SET,CFG_FLASH0_BASE,(flash_info[0].start[2] - 1),&flash_info[0]);
+
+ return (size_b0 + size_b1 + size_b2);
+}
+
+void flash_print_info(flash_info_t * info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf("missing or unknown FLASH type\n");
+ return;
+ }
+
+ switch (info->flash_id) {
+ case FLASH_PSD4256GV:
+ printf("ST Microelectronics ");
+ break;
+ default:
+ printf("Unknown Vendor ");
+ break;
+ }
+ 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");
+ return;
+}
+
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+ int cnt = 0,i;
+ int prot,sect;
+
+ prot = 0;
+ for (sect = s_first; sect <= s_last; ++sect) {
+ if (info->protect[sect])
+ prot++;
+ }
+
+ if (prot)
+ printf ("- Warning: %d protected sectors will not be erased!\n", prot);
+ else
+ printf ("\n");
+
+ cnt = s_last - s_first + 1;
+
+ if (cnt == FLASH_TOT_SECT) {
+ printf("Erasing flash, Please Wait \n");
+ if(erase_flash() < 0) {
+ printf("Erasing flash failed \n");
+ return FLASH_FAIL;
+ }
+ } else {
+ printf("Erasing Flash locations, Please Wait\n");
+ for (i = s_first; i <= s_last; i++) {
+ if (info->protect[i] == 0) { /* not protected */
+ if(erase_block_flash(i, info->start[i]) < 0) {
+ printf("Error Sector erasing \n");
+ return FLASH_FAIL;
+ }
+ }
+ }
+ }
+ return FLASH_SUCCESS;
+}
+
+int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ int ret;
+
+ ret = write_data(addr, cnt, 1, (int *) src);
+ if(ret == FLASH_FAIL)
+ return ERR_NOT_ERASED;
+ return FLASH_SUCCESS;
+}
+
+
+int write_data(long lStart, long lCount, long lStride, int *pnData)
+{
+ long i = 0;
+ int j = 0;
+ unsigned long ulOffset = lStart - CFG_FLASH_BASE;
+ int d;
+ int iShift = 0;
+ int iNumWords = 2;
+ int nLeftover = lCount % 4;
+ int nSector = 0;
+
+ for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
+ for (iShift = 0, j = 0; (j < iNumWords);
+ j++, ulOffset += (lStride * 2)) {
+ if ((ulOffset >= INVALIDLOCNSTART)
+ && (ulOffset < INVALIDLOCNEND)) {
+ printf("Invalid locations, Try writing to another location \n");
+ return FLASH_FAIL;
+ }
+ get_sector_number(ulOffset, &nSector);
+ read_flash(ulOffset,&d);
+ if(d != 0xffff) {
+ printf("Flash not erased at offset 0x%x Please erase to reprogram \n",ulOffset);
+ return FLASH_FAIL;
+ }
+ unlock_flash(ulOffset);
+ if(write_flash(ulOffset, (pnData[i] >> iShift)) < 0) {
+ printf("Error programming the flash \n");
+ return FLASH_FAIL;
+ }
+ iShift += 16;
+ }
+ }
+ if (nLeftover > 0) {
+ if ((ulOffset >= INVALIDLOCNSTART)
+ && (ulOffset < INVALIDLOCNEND))
+ return FLASH_FAIL;
+ get_sector_number(ulOffset, &nSector);
+ read_flash(ulOffset,&d);
+ if(d != 0xffff) {
+ printf("Flash already programmed. Please erase to reprogram \n");
+ printf("uloffset = 0x%x \t d = 0x%x\n",ulOffset,d);
+ return FLASH_FAIL;
+ }
+ unlock_flash(ulOffset);
+ if(write_flash(ulOffset, pnData[i]) < 0) {
+ printf("Error programming the flash \n");
+ return FLASH_FAIL;
+ }
+ }
+ return FLASH_SUCCESS;
+}
+
+int read_data(long ulStart, long lCount, long lStride, int *pnData)
+{
+ long i = 0;
+ int j = 0;
+ long ulOffset = ulStart;
+ int iShift = 0;
+ int iNumWords = 2;
+ int nLeftover = lCount % 4;
+ int nHi, nLow;
+ int nSector = 0;
+
+ for (i = 0; (i < lCount / 4) && (i < BUFFER_SIZE); i++) {
+ for (iShift = 0, j = 0; j < iNumWords; j += 2) {
+ if ((ulOffset >= INVALIDLOCNSTART)
+ && (ulOffset < INVALIDLOCNEND))
+ return FLASH_FAIL;
+
+ get_sector_number(ulOffset, &nSector);
+ read_flash(ulOffset, &nLow);
+ ulOffset += (lStride * 2);
+ read_flash(ulOffset, &nHi);
+ ulOffset += (lStride * 2);
+ pnData[i] = (nHi << 16) | nLow;
+ }
+ }
+ if (nLeftover > 0) {
+ if ((ulOffset >= INVALIDLOCNSTART)
+ && (ulOffset < INVALIDLOCNEND))
+ return FLASH_FAIL;
+
+ get_sector_number(ulOffset, &nSector);
+ read_flash(ulOffset, &pnData[i]);
+ }
+ return FLASH_SUCCESS;
+}
+
+int write_flash(long nOffset, int nValue)
+{
+ long addr;
+
+ addr = (CFG_FLASH_BASE + nOffset);
+ asm("ssync;");
+ *(unsigned volatile short *) addr = nValue;
+ asm("ssync;");
+ if(poll_toggle_bit(nOffset) < 0)
+ return FLASH_FAIL;
+ return FLASH_SUCCESS;
+}
+
+int read_flash(long nOffset, int *pnValue)
+{
+ int nValue = 0x0;
+ long addr = (CFG_FLASH_BASE + nOffset);
+
+ if (nOffset != 0x2)
+ reset_flash();
+ asm("ssync;");
+ nValue = *(volatile unsigned short *) addr;
+ asm("ssync;");
+ *pnValue = nValue;
+ return TRUE;
+}
+
+int poll_toggle_bit(long lOffset)
+{
+ unsigned int u1,u2;
+ unsigned long timeout = 0xFFFFFFFF;
+ volatile unsigned long *FB = (volatile unsigned long *)(0x20000000 + lOffset);
+ while(1) {
+ if(timeout < 0)
+ break;
+ u1 = *(volatile unsigned short *)FB;
+ u2 = *(volatile unsigned short *)FB;
+ if((u1 & 0x0040) == (u2 & 0x0040))
+ return FLASH_SUCCESS;
+ if((u2 & 0x0020) == 0x0000)
+ continue;
+ u1 = *(volatile unsigned short *)FB;
+ if((u2 & 0x0040) == (u1 & 0x0040))
+ return FLASH_SUCCESS;
+ else {
+ reset_flash();
+ return FLASH_FAIL;
+ }
+ timeout--;
+ }
+ printf("Time out occured \n");
+ if(timeout <0) return FLASH_FAIL;
+}
+
+void reset_flash(void)
+{
+ write_flash(WRITESEQ1, RESET_VAL);
+ /* Wait for 10 micro seconds */
+ udelay(10);
+}
+
+int erase_flash(void)
+{
+ write_flash(WRITESEQ1, WRITEDATA1);
+ write_flash(WRITESEQ2, WRITEDATA2);
+ write_flash(WRITESEQ3, WRITEDATA3);
+ write_flash(WRITESEQ4, WRITEDATA4);
+ write_flash(WRITESEQ5, WRITEDATA5);
+ write_flash(WRITESEQ6, WRITEDATA6);
+
+ if(poll_toggle_bit(0x0000) < 0)
+ return FLASH_FAIL;
+
+ write_flash(SecFlashAOff + WRITESEQ1, WRITEDATA1);
+ write_flash(SecFlashAOff + WRITESEQ2, WRITEDATA2);
+ write_flash(SecFlashAOff + WRITESEQ3, WRITEDATA3);
+ write_flash(SecFlashAOff + WRITESEQ4, WRITEDATA4);
+ write_flash(SecFlashAOff + WRITESEQ5, WRITEDATA5);
+ write_flash(SecFlashAOff + WRITESEQ6, WRITEDATA6);
+
+ if(poll_toggle_bit(SecFlashASec1Off) < 0)
+ return FLASH_FAIL;
+
+ write_flash(PriFlashBOff + WRITESEQ1, WRITEDATA1);
+ write_flash(PriFlashBOff + WRITESEQ2, WRITEDATA2);
+ write_flash(PriFlashBOff + WRITESEQ3, WRITEDATA3);
+ write_flash(PriFlashBOff + WRITESEQ4, WRITEDATA4);
+ write_flash(PriFlashBOff + WRITESEQ5, WRITEDATA5);
+ write_flash(PriFlashBOff + WRITESEQ6, WRITEDATA6);
+
+ if(poll_toggle_bit(PriFlashBOff) <0)
+ return FLASH_FAIL;
+
+ write_flash(SecFlashBOff + WRITESEQ1, WRITEDATA1);
+ write_flash(SecFlashBOff + WRITESEQ2, WRITEDATA2);
+ write_flash(SecFlashBOff + WRITESEQ3, WRITEDATA3);
+ write_flash(SecFlashBOff + WRITESEQ4, WRITEDATA4);
+ write_flash(SecFlashBOff + WRITESEQ5, WRITEDATA5);
+ write_flash(SecFlashBOff + WRITESEQ6, WRITEDATA6);
+
+ if(poll_toggle_bit(SecFlashBOff) < 0)
+ return FLASH_FAIL;
+
+ return FLASH_SUCCESS;
+}
+
+int erase_block_flash(int nBlock, unsigned long address)
+{
+ long ulSectorOff = 0x0;
+
+ if ((nBlock < 0) || (nBlock > AFP_NumSectors))
+ return FALSE;
+
+ ulSectorOff = (address - CFG_FLASH_BASE);
+
+ write_flash((WRITESEQ1 | ulSectorOff), WRITEDATA1);
+ write_flash((WRITESEQ2 | ulSectorOff), WRITEDATA2);
+ write_flash((WRITESEQ3 | ulSectorOff), WRITEDATA3);
+ write_flash((WRITESEQ4 | ulSectorOff), WRITEDATA4);
+ write_flash((WRITESEQ5 | ulSectorOff), WRITEDATA5);
+
+ write_flash(ulSectorOff, BlockEraseVal);
+
+ if(poll_toggle_bit(ulSectorOff) < 0)
+ return FLASH_FAIL;
+
+ return FLASH_SUCCESS;
+}
+
+void unlock_flash(long ulOffset)
+{
+ unsigned long ulOffsetAddr = ulOffset;
+ ulOffsetAddr &= 0xFFFF0000;
+
+ write_flash((WRITESEQ1 | ulOffsetAddr), UNLOCKDATA1);
+ write_flash((WRITESEQ2 | ulOffsetAddr), UNLOCKDATA2);
+ write_flash((WRITESEQ3 | ulOffsetAddr), UNLOCKDATA3);
+}
+
+int get_codes()
+{
+ int dev_id = 0;
+
+ write_flash(WRITESEQ1, GETCODEDATA1);
+ write_flash(WRITESEQ2, GETCODEDATA2);
+ write_flash(WRITESEQ3, GETCODEDATA3);
+
+ read_flash(0x0002, &dev_id);
+ dev_id &= 0x00FF;
+
+ reset_flash();
+
+ return dev_id;
+}
+
+void get_sector_number(long ulOffset, int *pnSector)
+{
+ int nSector = 0;
+
+ if (ulOffset >= SecFlashAOff) {
+ if ((ulOffset < SecFlashASec1Off)
+ && (ulOffset < SecFlashASec2Off)) {
+ nSector = SECT32;
+ } else if ((ulOffset >= SecFlashASec2Off)
+ && (ulOffset < SecFlashASec3Off)) {
+ nSector = SECT33;
+ } else if ((ulOffset >= SecFlashASec3Off)
+ && (ulOffset < SecFlashASec4Off)) {
+ nSector = SECT34;
+ } else if ((ulOffset >= SecFlashASec4Off)
+ && (ulOffset < SecFlashAEndOff)) {
+ nSector = SECT35;
+ }
+ } else if (ulOffset >= SecFlashBOff) {
+ if ((ulOffset < SecFlashBSec1Off)
+ && (ulOffset < SecFlashBSec2Off)) {
+ nSector = SECT36;
+ }
+ if ((ulOffset < SecFlashBSec2Off)
+ && (ulOffset < SecFlashBSec3Off)) {
+ nSector = SECT37;
+ }
+ if ((ulOffset < SecFlashBSec3Off)
+ && (ulOffset < SecFlashBSec4Off)) {
+ nSector = SECT38;
+ }
+ if ((ulOffset < SecFlashBSec4Off)
+ && (ulOffset < SecFlashBEndOff)) {
+ nSector = SECT39;
+ }
+ } else if ((ulOffset >= PriFlashAOff) && (ulOffset < SecFlashAOff)) {
+ nSector = ulOffset & 0xffff0000;
+ nSector = ulOffset >> 16;
+ nSector = nSector & 0x000ff;
+ }
+
+ if ((nSector >= 0) && (nSector < AFP_NumSectors)) {
+ *pnSector = nSector;
+ }
+}
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