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-rw-r--r--board/cu824/flash.c486
1 files changed, 486 insertions, 0 deletions
diff --git a/board/cu824/flash.c b/board/cu824/flash.c
new file mode 100644
index 0000000..0cec41e
--- /dev/null
+++ b/board/cu824/flash.c
@@ -0,0 +1,486 @@
+/*
+ * (C) Copyright 2001
+ * 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 <common.h>
+#include <mpc824x.h>
+#include <asm/processor.h>
+
+#if defined(CFG_ENV_IS_IN_FLASH)
+# ifndef CFG_ENV_ADDR
+# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
+# endif
+# ifndef CFG_ENV_SIZE
+# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
+# endif
+# ifndef CFG_ENV_SECT_SIZE
+# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
+# endif
+#endif
+
+#define FLASH_BANK_SIZE 0x800000
+#define MAIN_SECT_SIZE 0x40000
+#define PARAM_SECT_SIZE 0x8000
+
+#define BOARD_CTRL_REG 0xFE800013
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+static int write_data (flash_info_t *info, ulong dest, ulong *data);
+static void write_via_fpu(vu_long *addr, ulong *data);
+static __inline__ unsigned long get_msr(void);
+static __inline__ void set_msr(unsigned long msr);
+
+/*---------------------------------------------------------------------*/
+#undef DEBUG_FLASH
+
+/*---------------------------------------------------------------------*/
+#ifdef DEBUG_FLASH
+#define DEBUGF(fmt,args...) printf(fmt ,##args)
+#else
+#define DEBUGF(fmt,args...)
+#endif
+/*---------------------------------------------------------------------*/
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init(void)
+{
+ int i, j;
+ ulong size = 0;
+ volatile unsigned char *bcr = (volatile unsigned char *)(BOARD_CTRL_REG);
+
+ DEBUGF("Write protect was: 0x%02X\n", *bcr);
+ *bcr &= 0x1; /* FWPT must be 0 */
+ *bcr |= 0x6; /* FWP0 = FWP1 = 1 */
+ DEBUGF("Write protect is: 0x%02X\n", *bcr);
+
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+ vu_long *addr = (vu_long *)(CFG_FLASH_BASE + i * FLASH_BANK_SIZE);
+
+ addr[0] = 0x00900090;
+
+ DEBUGF ("Flash bank # %d:\n"
+ "\tManuf. ID @ 0x%08lX: 0x%08lX\n"
+ "\tDevice ID @ 0x%08lX: 0x%08lX\n",
+ i,
+ (ulong)(&addr[0]), addr[0],
+ (ulong)(&addr[2]), addr[2]);
+
+ if ((addr[0] == addr[1]) && (addr[0] == INTEL_MANUFACT) &&
+ (addr[2] == addr[3]) && (addr[2] == INTEL_ID_28F160F3B))
+ {
+ flash_info[i].flash_id = (FLASH_MAN_INTEL & FLASH_VENDMASK) |
+ (INTEL_ID_28F160F3B & FLASH_TYPEMASK);
+ } else {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ addr[0] = 0xFFFFFFFF;
+ goto Done;
+ }
+
+ DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
+
+ addr[0] = 0xFFFFFFFF;
+
+ flash_info[i].size = FLASH_BANK_SIZE;
+ flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+ memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+ for (j = 0; j < flash_info[i].sector_count; j++) {
+ if (j <= 7) {
+ flash_info[i].start[j] = CFG_FLASH_BASE +
+ i * FLASH_BANK_SIZE +
+ j * PARAM_SECT_SIZE;
+ } else {
+ flash_info[i].start[j] = CFG_FLASH_BASE +
+ i * FLASH_BANK_SIZE +
+ (j - 7)*MAIN_SECT_SIZE;
+ }
+ }
+ size += flash_info[i].size;
+ }
+
+ /* Protect monitor and environment sectors
+ */
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + FLASH_BANK_SIZE
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
+ &flash_info[1]);
+#else
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
+ &flash_info[0]);
+#endif
+#endif
+
+#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
+#if CFG_ENV_ADDR >= CFG_FLASH_BASE + FLASH_BANK_SIZE
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+ &flash_info[1]);
+#else
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+ &flash_info[0]);
+#endif
+#endif
+
+Done:
+ return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t * info)
+{
+ int i;
+
+ switch ((i = info->flash_id & FLASH_VENDMASK)) {
+ case (FLASH_MAN_INTEL & FLASH_VENDMASK):
+ printf ("Intel: ");
+ break;
+ default:
+ printf ("Unknown Vendor 0x%04x ", i);
+ break;
+ }
+
+ switch ((i = info->flash_id & FLASH_TYPEMASK)) {
+ case (INTEL_ID_28F160F3B & FLASH_TYPEMASK):
+ printf ("28F160F3B (16Mbit)\n");
+ break;
+ default:
+ printf ("Unknown Chip Type 0x%04x\n", i);
+ 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:
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ int flag, prot, sect;
+ ulong start, now, last;
+
+ DEBUGF ("Erase flash bank %d sect %d ... %d\n",
+ info - &flash_info[0], s_first, s_last);
+
+ if ((s_first < 0) || (s_first > s_last)) {
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("- missing\n");
+ } else {
+ printf ("- no sectors to erase\n");
+ }
+ return 1;
+ }
+
+ if ((info->flash_id & FLASH_VENDMASK) !=
+ (FLASH_MAN_INTEL & FLASH_VENDMASK)) {
+ printf ("Can erase only Intel flash types - aborted\n");
+ return 1;
+ }
+
+ 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");
+ }
+
+ start = get_timer (0);
+ last = start;
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ vu_long *addr = (vu_long *)(info->start[sect]);
+
+ DEBUGF ("Erase sect %d @ 0x%08lX\n",
+ sect, (ulong)addr);
+
+ /* Disable interrupts which might cause a timeout
+ * here.
+ */
+ flag = disable_interrupts();
+
+ addr[0] = 0x00500050; /* clear status register */
+ addr[0] = 0x00200020; /* erase setup */
+ addr[0] = 0x00D000D0; /* erase confirm */
+
+ addr[1] = 0x00500050; /* clear status register */
+ addr[1] = 0x00200020; /* erase setup */
+ addr[1] = 0x00D000D0; /* erase confirm */
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ while (((addr[0] & 0x00800080) != 0x00800080) ||
+ ((addr[1] & 0x00800080) != 0x00800080) ) {
+ if ((now=get_timer(start)) >
+ CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ addr[0] = 0x00B000B0; /* suspend erase */
+ addr[0] = 0x00FF00FF; /* to read mode */
+ return 1;
+ }
+
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+ addr[0] = 0x00FF00FF;
+ }
+ }
+ printf (" done\n");
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+#define FLASH_WIDTH 8 /* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong wp, cp, msr;
+ int l, rc, i;
+ ulong data[2];
+ ulong *datah = &data[0];
+ ulong *datal = &data[1];
+
+ DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n",
+ addr, (ulong)src, cnt);
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return 4;
+ }
+
+ msr = get_msr();
+ set_msr(msr | MSR_FP);
+
+ wp = (addr & ~(FLASH_WIDTH-1)); /* get lower aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - wp) != 0) {
+ *datah = *datal = 0;
+
+ for (i = 0, cp = wp; i < l; i++, cp++) {
+ if (i >= 4) {
+ *datah = (*datah << 8) |
+ ((*datal & 0xFF000000) >> 24);
+ }
+
+ *datal = (*datal << 8) | (*(uchar *)cp);
+ }
+ for (; i < FLASH_WIDTH && cnt > 0; ++i) {
+ char tmp;
+
+ tmp = *src;
+
+ src++;
+
+ if (i >= 4) {
+ *datah = (*datah << 8) |
+ ((*datal & 0xFF000000) >> 24);
+ }
+
+ *datal = (*datal << 8) | tmp;
+
+ --cnt; ++cp;
+ }
+
+ for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) {
+ if (i >= 4) {
+ *datah = (*datah << 8) |
+ ((*datal & 0xFF000000) >> 24);
+ }
+
+ *datal = (*datah << 8) | (*(uchar *)cp);
+ }
+
+ if ((rc = write_data(info, wp, data)) != 0) {
+ set_msr(msr);
+ return (rc);
+ }
+
+ wp += FLASH_WIDTH;
+ }
+
+ /*
+ * handle FLASH_WIDTH aligned part
+ */
+ while (cnt >= FLASH_WIDTH) {
+ *datah = *(ulong *)src;
+ *datal = *(ulong *)(src + 4);
+ if ((rc = write_data(info, wp, data)) != 0) {
+ set_msr(msr);
+ return (rc);
+ }
+ wp += FLASH_WIDTH;
+ cnt -= FLASH_WIDTH;
+ src += FLASH_WIDTH;
+ }
+
+ if (cnt == 0) {
+ set_msr(msr);
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ *datah = *datal = 0;
+ for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
+ char tmp;
+
+ tmp = *src;
+
+ src++;
+
+ if (i >= 4) {
+ *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
+ }
+
+ *datal = (*datal << 8) | tmp;
+
+ --cnt;
+ }
+
+ for (; i < FLASH_WIDTH; ++i, ++cp) {
+ if (i >= 4) {
+ *datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
+ }
+
+ *datal = (*datal << 8) | (*(uchar *)cp);
+ }
+
+ rc = write_data(info, wp, data);
+ set_msr(msr);
+
+ return (rc);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, ulong *data)
+{
+ vu_long *addr = (vu_long *)dest;
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if (((addr[0] & data[0]) != data[0]) ||
+ ((addr[1] & data[1]) != data[1]) ) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0] = 0x00400040; /* write setup */
+ write_via_fpu(addr, data);
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer (0);
+
+ while (((addr[0] & 0x00800080) != 0x00800080) ||
+ ((addr[1] & 0x00800080) != 0x00800080) ) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ addr[0] = 0x00FF00FF; /* restore read mode */
+ return (1);
+ }
+ }
+
+ addr[0] = 0x00FF00FF; /* restore read mode */
+
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void write_via_fpu(vu_long *addr, ulong *data)
+{
+ __asm__ __volatile__ ("lfd 1, 0(%0)" : : "r" (data));
+ __asm__ __volatile__ ("stfd 1, 0(%0)" : : "r" (addr));
+}
+/*-----------------------------------------------------------------------
+ */
+static __inline__ unsigned long get_msr(void)
+{
+ unsigned long msr;
+
+ __asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
+ return msr;
+}
+
+static __inline__ void set_msr(unsigned long msr)
+{
+ __asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
+}
generated by cgit v1.1 at 2024-11-21 23:57:03 +0000