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-rw-r--r--board/evb4510/flash.c540
1 files changed, 540 insertions, 0 deletions
diff --git a/board/evb4510/flash.c b/board/evb4510/flash.c
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index 0000000..5491827
--- /dev/null
+++ b/board/evb4510/flash.c
@@ -0,0 +1,540 @@
+/*
+ *
+ * Copyright (c) 2004 Cucy Systems (http://www.cucy.com)
+ * Curt Brune <curt@cucy.com>
+ *
+ * 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/hardware.h>
+#include <flash.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+typedef enum {
+ FLASH_DEV_U9_512KB = 0,
+ FLASH_DEV_U7_2MB = 1
+} FLASH_DEV;
+
+#define FLASH_DQ7 (0x80)
+#define FLASH_DQ5 (0x20)
+
+#define PROG_ADDR (0xAAA)
+#define SETUP_ADDR (0xAAA)
+#define ID_ADDR (0xAAA)
+#define UNLOCK_ADDR1 (0xAAA)
+#define UNLOCK_ADDR2 (0x555)
+
+#define UNLOCK_CMD1 (0xAA)
+#define UNLOCK_CMD2 (0x55)
+#define ERASE_SUSPEND_CMD (0xB0)
+#define ERASE_RESUME_CMD (0x30)
+#define RESET_CMD (0xF0)
+#define ID_CMD (0x90)
+#define SELECT_CMD (0x90)
+#define CHIPERASE_CMD (0x10)
+#define BYPASS_CMD (0x20)
+#define SECERASE_CMD (0x30)
+#define PROG_CMD (0xa0)
+#define SETUP_CMD (0x80)
+
+#if 0
+#define WRITE_UNLOCK(addr) { \
+ PUT__U8( addr + UNLOCK_ADDR1, UNLOCK_CMD1); \
+ PUT__U8( addr + UNLOCK_ADDR2, UNLOCK_CMD2); \
+}
+
+/* auto select command */
+#define CMD_ID(addr) WRITE_UNLOCK(addr); { \
+ PUT__U8( addr + ID_ADDR, ID_CMD); \
+}
+
+#define CMD_RESET(addr) WRITE_UNLOCK(addr); { \
+ PUT__U8( addr + ID_ADDR, RESET_CMD); \
+}
+
+#define CMD_ERASE_SEC(base, addr) WRITE_UNLOCK(base); \
+ PUT__U8( base + SETUP_ADDR, SETUP_CMD); \
+ WRITE_UNLOCK(base); \
+ PUT__U8( addr, SECERASE_CMD);
+
+#define CMD_ERASE_CHIP(base) WRITE_UNLOCK(base); \
+ PUT__U8( base + SETUP_ADDR, SETUP_CMD); \
+ WRITE_UNLOCK(base); \
+ PUT__U8( base + SETUP_ADDR, CHIPERASE_CMD);
+
+/* prepare for bypass programming */
+#define CMD_UNLOCK_BYPASS(addr) WRITE_UNLOCK(addr); { \
+ PUT__U8( addr + ID_ADDR, 0x20); \
+}
+
+/* terminate bypass programming */
+#define CMD_BYPASS_RESET(addr) { \
+ PUT__U8(addr, 0x90); \
+ PUT__U8(addr, 0x00); \
+}
+#endif
+
+inline static void FLASH_CMD_UNLOCK (FLASH_DEV dev, u32 base)
+{
+ switch (dev) {
+ case FLASH_DEV_U7_2MB:
+ PUT__U8 (base + 0xAAA, 0xAA);
+ PUT__U8 (base + 0x555, 0x55);
+ break;
+ case FLASH_DEV_U9_512KB:
+ PUT__U8 (base + 0x555, 0xAA);
+ PUT__U8 (base + 0x2AA, 0x55);
+ break;
+ }
+}
+
+inline static void FLASH_CMD_SELECT (FLASH_DEV dev, u32 base)
+{
+ switch (dev) {
+ case FLASH_DEV_U7_2MB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0xAAA, SELECT_CMD);
+ break;
+ case FLASH_DEV_U9_512KB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0x555, SELECT_CMD);
+ break;
+ }
+}
+
+inline static void FLASH_CMD_RESET (FLASH_DEV dev, u32 base)
+{
+ switch (dev) {
+ case FLASH_DEV_U7_2MB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0xAAA, RESET_CMD);
+ break;
+ case FLASH_DEV_U9_512KB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0x555, RESET_CMD);
+ break;
+ }
+}
+
+inline static void FLASH_CMD_ERASE_SEC (FLASH_DEV dev, u32 base, u32 addr)
+{
+ switch (dev) {
+ case FLASH_DEV_U7_2MB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0xAAA, SETUP_CMD);
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (addr, SECERASE_CMD);
+ break;
+ case FLASH_DEV_U9_512KB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0x555, SETUP_CMD);
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (addr, SECERASE_CMD);
+ break;
+ }
+}
+
+inline static void FLASH_CMD_ERASE_CHIP (FLASH_DEV dev, u32 base)
+{
+ switch (dev) {
+ case FLASH_DEV_U7_2MB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0xAAA, SETUP_CMD);
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base, CHIPERASE_CMD);
+ break;
+ case FLASH_DEV_U9_512KB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0x555, SETUP_CMD);
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base, CHIPERASE_CMD);
+ break;
+ }
+}
+
+inline static void FLASH_CMD_UNLOCK_BYPASS (FLASH_DEV dev, u32 base)
+{
+ switch (dev) {
+ case FLASH_DEV_U7_2MB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0xAAA, BYPASS_CMD);
+ break;
+ case FLASH_DEV_U9_512KB:
+ FLASH_CMD_UNLOCK (dev, base);
+ PUT__U8 (base + 0x555, BYPASS_CMD);
+ break;
+ }
+}
+
+inline static void FLASH_CMD_BYPASS_RESET (FLASH_DEV dev, u32 base)
+{
+ PUT__U8 (base, SELECT_CMD);
+ PUT__U8 (base, 0x0);
+}
+
+/* poll for flash command completion */
+static u16 _flash_poll (FLASH_DEV dev, u32 addr, u16 data, ulong timeOut)
+{
+ u32 done = 0;
+ ulong t0;
+
+ u16 error = 0;
+ volatile u16 flashData;
+
+ data = data & 0xFF;
+ t0 = get_timer (0);
+ while (get_timer (t0) < timeOut) {
+ /* for( i = 0; i < POLL_LOOPS; i++) { */
+ /* Read the Data */
+ flashData = GET__U8 (addr);
+
+ /* FLASH_DQ7 = Data? */
+ if ((flashData & FLASH_DQ7) == (data & FLASH_DQ7)) {
+ done = 1;
+ break;
+ }
+
+ /* Check Timeout (FLASH_DQ5==1) */
+ if (flashData & FLASH_DQ5) {
+ /* Read the Data */
+ flashData = GET__U8 (addr);
+
+ /* FLASH_DQ7 = Data? */
+ if (!((flashData & FLASH_DQ7) == (data & FLASH_DQ7))) {
+ printf ("_flash_poll(): FLASH_DQ7 & flashData not equal to write value\n");
+ error = ERR_PROG_ERROR;
+ }
+ FLASH_CMD_RESET (dev, addr);
+ done = 1;
+ break;
+ }
+ /* spin delay */
+ udelay (10);
+ }
+
+
+ /* error update */
+ if (!done) {
+ printf ("_flash_poll(): Timeout\n");
+ error = ERR_TIMOUT;
+ }
+
+ /* Check the data */
+ if (!error) {
+ /* Read the Data */
+ flashData = GET__U8 (addr);
+ if (flashData != data) {
+ error = ERR_PROG_ERROR;
+ printf ("_flash_poll(): flashData(0x%04x) not equal to data(0x%04x)\n",
+ flashData, data);
+ }
+ }
+
+ return error;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int _flash_check_protection (flash_info_t * info, int s_first, int s_last)
+{
+ int sect, prot = 0;
+
+ for (sect = s_first; sect <= s_last; sect++)
+ if (info->protect[sect]) {
+ printf (" Flash sector %d protected.\n", sect);
+ prot++;
+ }
+ return prot;
+}
+
+static int _detectFlash (FLASH_DEV dev, u32 base, u8 venId, u8 devId)
+{
+
+ u32 baseAddr = base | CACHE_DISABLE_MASK;
+ u8 vendorId, deviceId;
+
+ /* printf(__FUNCTION__"(): detecting flash @ 0x%08x\n", base); */
+
+ /* Send auto select command and read manufacturer info */
+ FLASH_CMD_SELECT (dev, baseAddr);
+ vendorId = GET__U8 (baseAddr);
+ FLASH_CMD_RESET (dev, baseAddr);
+
+ /* Send auto select command and read device info */
+ FLASH_CMD_SELECT (dev, baseAddr);
+
+ if (dev == FLASH_DEV_U7_2MB) {
+ deviceId = GET__U8 (baseAddr + 2);
+ } else if (dev == FLASH_DEV_U9_512KB) {
+ deviceId = GET__U8 (baseAddr + 1);
+ } else {
+ return 0;
+ }
+
+ FLASH_CMD_RESET (dev, baseAddr);
+
+ /* printf (__FUNCTION__"(): found vendorId 0x%04x, deviceId 0x%04x\n",
+ vendorId, deviceId);
+ */
+
+ return (vendorId == venId) && (deviceId == devId);
+
+}
+
+/******************************************************************************
+ *
+ * Public u-boot interface functions below
+ *
+ *****************************************************************************/
+
+/***************************************************************************
+ *
+ * Flash initialization
+ *
+ * This board has two banks of flash, but the base addresses depend on
+ * how the board is jumpered.
+ *
+ * The two flash types are:
+ *
+ * AMD Am29LV160DB (2MB) sectors layout 16KB, 2x8KB, 32KB, 31x64KB
+ *
+ * AMD Am29LV040B (512KB) sectors: 8x64KB
+ *****************************************************************************/
+
+unsigned long flash_init (void)
+{
+ flash_info_t *info;
+ u16 i;
+ u32 flashtest;
+ s16 amd160 = -1;
+ u32 amd160base = 0;
+
+#if CFG_MAX_FLASH_BANKS == 2
+ s16 amd040 = -1;
+ u32 amd040base = 0;
+#endif
+
+ /* configure PHYS_FLASH_1 */
+ if (_detectFlash (FLASH_DEV_U7_2MB, PHYS_FLASH_1, 0x1, 0x49)) {
+ amd160 = 0;
+ amd160base = PHYS_FLASH_1;
+#if CFG_MAX_FLASH_BANKS == 1
+ }
+#else
+ if (_detectFlash
+ (FLASH_DEV_U9_512KB, PHYS_FLASH_2, 0x1, 0x4F)) {
+ amd040 = 1;
+ amd040base = PHYS_FLASH_2;
+ } else {
+ printf (__FUNCTION__
+ "(): Unable to detect PHYS_FLASH_2: 0x%08x\n",
+ PHYS_FLASH_2);
+ }
+ } else if (_detectFlash (FLASH_DEV_U9_512KB, PHYS_FLASH_1, 0x1, 0x4F)) {
+ amd040 = 0;
+ amd040base = PHYS_FLASH_1;
+ if (_detectFlash (FLASH_DEV_U7_2MB, PHYS_FLASH_2, 0x1, 0x49)) {
+ amd160 = 1;
+ amd160base = PHYS_FLASH_2;
+ } else {
+ printf (__FUNCTION__
+ "(): Unable to detect PHYS_FLASH_2: 0x%08x\n",
+ PHYS_FLASH_2);
+ }
+ }
+#endif
+ else {
+ printf (__FUNCTION__
+ "(): Unable to detect PHYS_FLASH_1: 0x%08x\n",
+ PHYS_FLASH_1);
+ }
+
+ /* Configure AMD Am29LV160DB (2MB) */
+ info = &flash_info[amd160];
+ info->flash_id = FLASH_DEV_U7_2MB;
+ info->sector_count = 35;
+ info->size = 2 * 1024 * 1024; /* 2MB */
+ /* 1*16K Boot Block
+ 2*8K Parameter Block
+ 1*32K Small Main Block */
+ info->start[0] = amd160base;
+ info->start[1] = amd160base + 0x4000;
+ info->start[2] = amd160base + 0x6000;
+ info->start[3] = amd160base + 0x8000;
+ for (i = 1; i < info->sector_count; i++)
+ info->start[3 + i] = amd160base + i * (64 * 1024);
+
+ for (i = 0; i < info->sector_count; i++) {
+ /* Write auto select command sequence and query sector protection */
+ FLASH_CMD_SELECT (info->flash_id,
+ info->start[i] | CACHE_DISABLE_MASK);
+ flashtest =
+ GET__U8 (((info->start[i] + 4) | CACHE_DISABLE_MASK));
+ FLASH_CMD_RESET (info->flash_id,
+ amd160base | CACHE_DISABLE_MASK);
+ info->protect[i] = (flashtest & 0x0001);
+ }
+
+ /*
+ * protect monitor and environment sectors in 2MB flash
+ */
+ flash_protect (FLAG_PROTECT_SET,
+ amd160base, amd160base + monitor_flash_len - 1, info);
+
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, info);
+
+#if CFG_MAX_FLASH_BANKS == 2
+ /* Configure AMD Am29LV040B (512KB) */
+ info = &flash_info[amd040];
+ info->flash_id = FLASH_DEV_U9_512KB;
+ info->sector_count = 8;
+ info->size = 512 * 1024; /* 512KB, 8 x 64KB */
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = amd040base + i * (64 * 1024);
+ /* Write auto select command sequence and query sector protection */
+ FLASH_CMD_SELECT (info->flash_id,
+ info->start[i] | CACHE_DISABLE_MASK);
+ flashtest =
+ GET__U8 (((info->start[i] + 2) | CACHE_DISABLE_MASK));
+ FLASH_CMD_RESET (info->flash_id,
+ amd040base | CACHE_DISABLE_MASK);
+ info->protect[i] = (flashtest & 0x0001);
+ }
+#endif
+
+ return flash_info[0].size
+#if CFG_MAX_FLASH_BANKS == 2
+ + flash_info[1].size
+#endif
+ ;
+}
+
+void flash_print_info (flash_info_t * info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_DEV_U7_2MB) {
+ printf ("AMD Am29LV160DB (2MB) 16KB,2x8KB,32KB,31x64KB\n");
+ } else if (info->flash_id == FLASH_DEV_U9_512KB) {
+ printf ("AMD Am29LV040B (512KB) 8x64KB\n");
+ } else {
+ printf ("Unknown flash_id ...\n");
+ return;
+ }
+
+ printf (" Size: %ld KB in %d Sectors\n",
+ info->size >> 10, info->sector_count);
+ printf (" Sector Start Addresses:");
+ for (i = 0; i < info->sector_count; i++) {
+ if ((i % 4) == 0)
+ printf ("\n ");
+ printf (" S%02d @ 0x%08lX%s", i,
+ info->start[i], info->protect[i] ? " !" : " ");
+ }
+ printf ("\n");
+}
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+ u16 i, error = 0;
+
+ printf ("\n");
+
+ /* check flash protection bits */
+ if (_flash_check_protection (info, s_first, s_last)) {
+ printf (" Flash erase aborted due to protected sectors\n");
+ return ERR_PROTECTED;
+ }
+
+ if ((s_first < info->sector_count) && (s_first <= s_last)) {
+ for (i = s_first; i <= s_last && !error; i++) {
+ printf (" Erasing Sector %d @ 0x%08lx ... ", i,
+ info->start[i]);
+ /* bypass the cache to access the flash memory */
+ FLASH_CMD_ERASE_SEC (info->flash_id,
+ (info->
+ start[0] | CACHE_DISABLE_MASK),
+ (info->
+ start[i] | CACHE_DISABLE_MASK));
+ /* look for sector to become 0xFF after erase */
+ error = _flash_poll (info->flash_id,
+ info->
+ start[i] | CACHE_DISABLE_MASK,
+ 0xFF, CFG_FLASH_ERASE_TOUT);
+ FLASH_CMD_RESET (info->flash_id,
+ (info->
+ start[0] | CACHE_DISABLE_MASK));
+ printf ("done\n");
+ if (error) {
+ break;
+ }
+ }
+ } else
+ error = ERR_INVAL;
+
+ return error;
+}
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ u16 error = 0, i;
+ u32 n;
+ u8 *bp, *bps;
+
+ /* Write Setup */
+ /* bypass the cache to access the flash memory */
+ FLASH_CMD_UNLOCK_BYPASS (info->flash_id,
+ (info->start[0] | CACHE_DISABLE_MASK));
+
+ /* Write the Data to Flash */
+
+ bp = (u8 *) (addr | CACHE_DISABLE_MASK);
+ bps = (u8 *) src;
+
+ for (n = 0; n < cnt && !error; n++, bp++, bps++) {
+
+ if (!(n % (cnt / 15))) {
+ printf (".");
+ }
+
+ /* write the flash command for flash memory */
+ *bp = 0xA0;
+
+ /* Write the data */
+ *bp = *bps;
+
+ /* Check if the write is done */
+ for (i = 0; i < 0xff; i++);
+ error = _flash_poll (info->flash_id, (u32) bp, *bps,
+ CFG_FLASH_WRITE_TOUT);
+ if (error) {
+ return error;
+ }
+ }
+
+ /* Reset the Flash Mode to read */
+ FLASH_CMD_BYPASS_RESET (info->flash_id, info->start[0]);
+
+ printf (" ");
+
+ return error;
+}
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