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-rw-r--r--board/sl8245/flash.c488
1 files changed, 488 insertions, 0 deletions
diff --git a/board/sl8245/flash.c b/board/sl8245/flash.c
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--- /dev/null
+++ b/board/sl8245/flash.c
@@ -0,0 +1,488 @@
+/*
+ * (C) Copyright 2001 - 2003
+ * 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_SECT1_SIZE 0x20000
+#define PARAM_SECT23_SIZE 0x8000
+#define PARAM_SECT4_SIZE 0x10000
+
+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
+/*---------------------------------------------------------------------*/
+
+#define __align__ __attribute__ ((aligned (8)))
+static __align__ ulong precmd0[2] = { 0x00aa00aa, 0x00aa00aa };
+static __align__ ulong precmd1[2] = { 0x00550055, 0x00550055 };
+static __align__ ulong cmdid[2] = { 0x00900090, 0x00900090 };
+static __align__ ulong cmderase[2] = { 0x00800080, 0x00800080 };
+static __align__ ulong cmdersusp[2] = { 0x00b000b0, 0x00b000b0 };
+static __align__ ulong cmdsecter[2] = { 0x00300030, 0x00300030 };
+static __align__ ulong cmdprog[2] = { 0x00a000a0, 0x00a000a0 };
+static __align__ ulong cmdres[2] = { 0x00f000f0, 0x00f000f0 };
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+ int i, j;
+ ulong size = 0;
+
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+ vu_long *addr = (vu_long *) (CFG_FLASH_BASE + i * FLASH_BANK_SIZE);
+
+ write_via_fpu (&addr[0xaaa], precmd0);
+ write_via_fpu (&addr[0x554], precmd1);
+ write_via_fpu (&addr[0xaaa], cmdid);
+
+ 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] == AMD_MANUFACT) &&
+ (addr[2] == addr[3]) && (addr[2] == AMD_ID_LV160T)) {
+ flash_info[i].flash_id = (FLASH_MAN_AMD & FLASH_VENDMASK) |
+ (FLASH_AM160T & FLASH_TYPEMASK);
+ } else {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ write_via_fpu (addr, cmdres);
+ goto Done;
+ }
+
+ DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
+
+ write_via_fpu (addr, cmdres);
+
+ 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 < 32; j++) {
+ flash_info[i].start[j] = CFG_FLASH_BASE +
+ i * FLASH_BANK_SIZE + j * MAIN_SECT_SIZE;
+ }
+ flash_info[i].start[32] =
+ flash_info[i].start[31] + PARAM_SECT1_SIZE;
+ flash_info[i].start[33] =
+ flash_info[i].start[32] + PARAM_SECT23_SIZE;
+ flash_info[i].start[34] =
+ flash_info[i].start[33] + PARAM_SECT23_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 + monitor_flash_len - 1,
+ &flash_info[1]);
+#else
+ flash_protect ( FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + monitor_flash_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_AMD & FLASH_VENDMASK):
+ printf ("Intel: ");
+ break;
+ default:
+ printf ("Unknown Vendor 0x%04x ", i);
+ break;
+ }
+
+ switch ((i = info->flash_id & FLASH_TYPEMASK)) {
+ case (FLASH_AM160T & FLASH_TYPEMASK):
+ printf ("AM29LV160BT (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_AMD & FLASH_VENDMASK)) {
+ printf ("Can erase only AMD 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 ();
+
+ write_via_fpu (&addr[0xaaa], precmd0);
+ write_via_fpu (&addr[0x554], precmd1);
+ write_via_fpu (&addr[0xaaa], cmderase);
+ write_via_fpu (&addr[0xaaa], precmd0);
+ write_via_fpu (&addr[0x554], precmd1);
+ write_via_fpu (&addr[0xaaa], cmdsecter);
+
+ /* 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");
+ write_via_fpu (addr, cmdersusp);
+ write_via_fpu (addr, cmdres);
+ return 1;
+ }
+
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+ write_via_fpu (addr, cmdres);
+ }
+ }
+ 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 *chip = (vu_long *) (info->start[0]);
+ 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 ();
+
+ write_via_fpu (&chip[0xaaa], precmd0);
+ write_via_fpu (&chip[0x554], precmd1);
+ write_via_fpu (&chip[0xaaa], cmdprog);
+ write_via_fpu (addr, data);
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts ();
+
+ start = get_timer (0);
+
+ while (((addr[0] & 0x00800080) != (data[0] & 0x00800080)) ||
+ ((addr[1] & 0x00800080) != (data[1] & 0x00800080))) {
+ if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+ write_via_fpu (chip, cmdres);
+ return (1);
+ }
+ }
+
+ write_via_fpu (chip, cmdres);
+
+ 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));
+}