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-rw-r--r--board/sc520_cdp/flash_old.c458
1 files changed, 458 insertions, 0 deletions
diff --git a/board/sc520_cdp/flash_old.c b/board/sc520_cdp/flash_old.c
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+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.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 <common.h>
+#include <asm/io.h>
+
+ulong myflush(void);
+
+
+#define SC520_MAX_FLASH_BANKS 3
+#define SC520_FLASH_BANK0_BASE 0x38000000 /* BOOTCS */
+#define SC520_FLASH_BANK1_BASE 0x30000000 /* ROMCS0 */
+#define SC520_FLASH_BANK2_BASE 0x28000000 /* ROMCS1 */
+#define SC520_FLASH_BANKSIZE 0x8000000
+
+#define AMD29LV016_SIZE 0x200000
+#define AMD29LV016_SECTORS 32
+
+flash_info_t flash_info[SC520_MAX_FLASH_BANKS];
+
+#define CMD_READ_ARRAY 0x00F000F0
+#define CMD_UNLOCK1 0x00AA00AA
+#define CMD_UNLOCK2 0x00550055
+#define CMD_ERASE_SETUP 0x00800080
+#define CMD_ERASE_CONFIRM 0x00300030
+#define CMD_PROGRAM 0x00A000A0
+#define CMD_UNLOCK_BYPASS 0x00200020
+
+
+#define BIT_ERASE_DONE 0x00800080
+#define BIT_RDY_MASK 0x00800080
+#define BIT_PROGRAM_ERROR 0x00200020
+#define BIT_TIMEOUT 0x80000000 /* our flag */
+
+#define READY 1
+#define ERR 2
+#define TMO 4
+
+/*-----------------------------------------------------------------------
+ */
+
+ulong flash_init(void)
+{
+ int i, j;
+ ulong size = 0;
+
+ for (i = 0; i < SC520_MAX_FLASH_BANKS; i++) {
+ ulong flashbase = 0;
+ int sectsize = 0;
+ if (i==0 || i==2) {
+ /* FixMe: this assumes that bank 0 and 2
+ * are mapped to the two 8Mb banks */
+ flash_info[i].flash_id =
+ (AMD_MANUFACT & FLASH_VENDMASK) |
+ (AMD_ID_LV016B & FLASH_TYPEMASK);
+
+ flash_info[i].size = AMD29LV016_SIZE*4;
+ flash_info[i].sector_count = AMD29LV016_SECTORS;
+ sectsize = (AMD29LV016_SIZE*4)/AMD29LV016_SECTORS;
+ } else {
+ /* FixMe: this assumes that bank1 is unmapped
+ * (or mapped to the same flash bank as BOOTCS) */
+ flash_info[i].flash_id = 0;
+ flash_info[i].size = 0;
+ flash_info[i].sector_count = 0;
+ sectsize=0;
+ }
+ memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+ switch (i) {
+ case 0:
+ flashbase = SC520_FLASH_BANK0_BASE;
+ break;
+ case 1:
+ flashbase = SC520_FLASH_BANK1_BASE;
+ break;
+ case 2:
+ flashbase = SC520_FLASH_BANK0_BASE;
+ break;
+ default:
+ panic("configured to many flash banks!\n");
+ }
+
+ for (j = 0; j < flash_info[i].sector_count; j++) {
+ flash_info[i].start[j] = sectsize;
+ flash_info[i].start[j] = flashbase + j * sectsize;
+ }
+ size += flash_info[i].size;
+ }
+
+ /*
+ * Protect monitor and environment sectors
+ */
+ flash_protect(FLAG_PROTECT_SET,
+ i386boot_start-SC520_FLASH_BANK0_BASE,
+ i386boot_end-SC520_FLASH_BANK0_BASE,
+ &flash_info[0]);
+
+#ifdef CFG_ENV_ADDR
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+ &flash_info[0]);
+#endif
+ return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info(flash_info_t *info)
+{
+ int i;
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case (AMD_MANUFACT & FLASH_VENDMASK):
+ printf("AMD: ");
+ break;
+ default:
+ printf("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case (AMD_ID_LV016B & FLASH_TYPEMASK):
+ printf("4x Amd29LV016B (16Mbit)\n");
+ break;
+ default:
+ printf("Unknown Chip Type\n");
+ goto done;
+ 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");
+
+ done:
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase(flash_info_t *info, int s_first, int s_last)
+{
+ ulong result;
+ int iflag, prot, sect;
+ int rc = ERR_OK;
+ int chip1, chip2;
+
+ /* 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) !=
+ (AMD_MANUFACT & FLASH_VENDMASK)) {
+ return ERR_UNKNOWN_FLASH_VENDOR;
+ }
+
+ prot = 0;
+ for (sect=s_first; sect<=s_last; ++sect) {
+ if (info->protect[sect]) {
+ prot++;
+ }
+ }
+ if (prot) {
+ 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.
+ */
+ 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 */
+ reset_timer();
+
+ if (info->protect[sect] == 0) {
+ /* not protected */
+ ulong addr = info->start[sect];
+
+ writel(CMD_UNLOCK1, addr + 1);
+ writel(CMD_UNLOCK2, addr + 2);
+ writel(CMD_ERASE_SETUP, addr + 1);
+
+ writel(CMD_UNLOCK1, addr + 1);
+ writel(CMD_UNLOCK2, addr + 2);
+ writel(CMD_ERASE_CONFIRM, addr);
+
+
+ /* wait until flash is ready */
+ chip1 = chip2 = 0;
+
+ do {
+ result = readl(addr);
+
+ /* check timeout */
+ if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
+ writel(CMD_READ_ARRAY, addr + 1);
+ chip1 = TMO;
+ break;
+ }
+
+ if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE) {
+ chip1 = READY;
+ }
+
+ if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR) {
+ chip1 = ERR;
+ }
+
+ if (!chip2 && (result >> 16) & BIT_ERASE_DONE) {
+ chip2 = READY;
+ }
+
+ if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR) {
+ chip2 = ERR;
+ }
+
+ } while (!chip1 || !chip2);
+
+ writel(CMD_READ_ARRAY, addr + 1);
+
+ if (chip1 == ERR || chip2 == ERR) {
+ rc = ERR_PROG_ERROR;
+ goto outahere;
+ }
+
+ if (chip1 == TMO) {
+ rc = ERR_TIMOUT;
+ goto outahere;
+ }
+
+ printf("ok.\n");
+ } else { /* it was protected */
+
+ printf("protected!\n");
+ }
+ }
+
+ if (ctrlc()) {
+ printf("User Interrupt!\n");
+ }
+
+outahere:
+ /* allow flash to settle - wait 10 ms */
+ udelay(10000);
+
+ if (iflag) {
+ enable_interrupts();
+ }
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+volatile static int write_word(flash_info_t *info, ulong dest, ulong data)
+{
+ ulong addr = dest;
+ ulong result;
+ int rc = ERR_OK;
+ int iflag;
+ int chip1, chip2;
+
+ /*
+ * Check if Flash is (sufficiently) erased
+ */
+ result = readl(addr);
+ if ((result & data) != data) {
+ return ERR_NOT_ERASED;
+ }
+
+ /*
+ * 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.
+ */
+ iflag = disable_interrupts();
+
+ writel(CMD_UNLOCK1, addr + 1);
+ writel(CMD_UNLOCK2, addr + 2);
+ writel(CMD_UNLOCK_BYPASS, addr + 1);
+ writel(addr, CMD_PROGRAM);
+ writel(addr, data);
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer();
+
+ /* wait until flash is ready */
+ chip1 = chip2 = 0;
+ do {
+ result = readl(addr);
+
+ /* check timeout */
+ if (get_timer(0) > CFG_FLASH_ERASE_TOUT) {
+ chip1 = ERR | TMO;
+ break;
+ }
+
+ if (!chip1 && ((result & 0x80) == (data & 0x80))) {
+ chip1 = READY;
+ }
+
+ if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
+ result = readl(addr);
+
+ if ((result & 0x80) == (data & 0x80)) {
+ chip1 = READY;
+ } else {
+ chip1 = ERR;
+ }
+ }
+
+ if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16)))) {
+ chip2 = READY;
+ }
+
+ if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
+ result = readl(addr);
+
+ if ((result & (0x80 << 16)) == (data & (0x80 << 16))) {
+ chip2 = READY;
+ } else {
+ chip2 = ERR;
+ }
+ }
+
+ } while (!chip1 || !chip2);
+
+ writel(CMD_READ_ARRAY, addr);
+
+ if (chip1 == ERR || chip2 == ERR || readl(addr) != data) {
+ rc = ERR_PROG_ERROR;
+ }
+
+ if (iflag) {
+ enable_interrupts();
+ }
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int l;
+ int i, rc;
+
+ wp = (addr & ~3); /* get lower word aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - wp) != 0) {
+ data = 0;
+ for (i=0, cp=wp; i<l; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *)cp << 24);
+ }
+ for (; i<4 && cnt>0; ++i) {
+ data = (data >> 8) | (*src++ << 24);
+ --cnt;
+ ++cp;
+ }
+ for (; cnt==0 && i<4; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *)cp << 24);
+ }
+
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return rc;
+ }
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+ data = *((vu_long*)src);
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return rc;
+ }
+ src += 4;
+ wp += 4;
+ cnt -= 4;
+ }
+
+ if (cnt == 0) {
+ return ERR_OK;
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+ data = (data >> 8) | (*src++ << 24);
+ --cnt;
+ }
+ for (; i<4; ++i, ++cp) {
+ data = (data >> 8) | (*(uchar *)cp << 24);
+ }
+
+ return write_word(info, wp, data);
+}
generated by cgit v1.1 at 2024-11-24 01:14:54 +0000