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-rw-r--r--board/ppmc7xx/flash.c494
1 files changed, 494 insertions, 0 deletions
diff --git a/board/ppmc7xx/flash.c b/board/ppmc7xx/flash.c
new file mode 100644
index 0000000..4be6f13
--- /dev/null
+++ b/board/ppmc7xx/flash.c
@@ -0,0 +1,494 @@
+/*
+ * flash.c
+ * -------
+ *
+ * Flash programming routines for the Wind River PPMC 74xx/7xx
+ * based on flash.c from the TQM8260 board.
+ *
+ * By Richard Danter (richard.danter@windriver.com)
+ * Copyright (C) 2005 Wind River Systems
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <74xx_7xx.h>
+
+#define DWORD unsigned long long
+
+/* Local function prototypes */
+static int write_dword (flash_info_t* info, ulong dest, unsigned char *pdata);
+static void write_via_fpu (volatile DWORD* addr, DWORD* data);
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+/*-----------------------------------------------------------------------
+ */
+void flash_reset (void)
+{
+ unsigned long msr;
+ DWORD cmd_reset = 0x00F000F000F000F0LL;
+
+ if (flash_info[0].flash_id != FLASH_UNKNOWN) {
+ msr = get_msr ();
+ set_msr (msr | MSR_FP);
+
+ write_via_fpu ((DWORD*)flash_info[0].start[0], &cmd_reset );
+
+ set_msr (msr);
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+ulong flash_get_size (ulong baseaddr, flash_info_t * info)
+{
+ int i;
+ unsigned long msr;
+ DWORD flashtest;
+ DWORD cmd_select[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
+ 0x0090009000900090LL };
+
+ /* Enable FPU */
+ msr = get_msr ();
+ set_msr (msr | MSR_FP);
+
+ /* Write auto-select command sequence */
+ write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[0] );
+ write_via_fpu ((DWORD*)(baseaddr + (0x02AA << 3)), &cmd_select[1] );
+ write_via_fpu ((DWORD*)(baseaddr + (0x0555 << 3)), &cmd_select[2] );
+
+ /* Restore FPU */
+ set_msr (msr);
+
+ /* Read manufacturer ID */
+ flashtest = *(volatile DWORD*)baseaddr;
+ switch ((int)flashtest) {
+ case AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case FUJ_MANUFACT:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ default:
+ /* No, faulty or unknown flash */
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0);
+ }
+
+ /* Read device ID */
+ flashtest = *(volatile DWORD*)(baseaddr + 8);
+ switch ((long)flashtest) {
+ case AMD_ID_LV800T:
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00400000;
+ break;
+ case AMD_ID_LV800B:
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00400000;
+ break;
+ case AMD_ID_LV160T:
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00800000;
+ break;
+ case AMD_ID_LV160B:
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00800000;
+ break;
+ case AMD_ID_DL322T:
+ info->flash_id += FLASH_AMDL322T;
+ info->sector_count = 71;
+ info->size = 0x01000000;
+ break;
+ case AMD_ID_DL322B:
+ info->flash_id += FLASH_AMDL322B;
+ info->sector_count = 71;
+ info->size = 0x01000000;
+ break;
+ case AMD_ID_DL323T:
+ info->flash_id += FLASH_AMDL323T;
+ info->sector_count = 71;
+ info->size = 0x01000000;
+ break;
+ case AMD_ID_DL323B:
+ info->flash_id += FLASH_AMDL323B;
+ info->sector_count = 71;
+ info->size = 0x01000000;
+ break;
+ case AMD_ID_LV640U:
+ info->flash_id += FLASH_AM640U;
+ info->sector_count = 128;
+ info->size = 0x02000000;
+ break;
+ default:
+ /* Unknown flash type */
+ info->flash_id = FLASH_UNKNOWN;
+ return (0);
+ }
+
+ if ((long)flashtest == AMD_ID_LV640U) {
+ /* set up sector start adress table (uniform sector type) */
+ for (i = 0; i < info->sector_count; i++)
+ info->start[i] = baseaddr + (i * 0x00040000);
+ } else if (info->flash_id & FLASH_BTYPE) {
+ /* set up sector start adress table (bottom sector type) */
+ info->start[0] = baseaddr + 0x00000000;
+ info->start[1] = baseaddr + 0x00010000;
+ info->start[2] = baseaddr + 0x00018000;
+ info->start[3] = baseaddr + 0x00020000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
+ }
+ } else {
+ /* set up sector start adress table (top sector type) */
+ i = info->sector_count - 1;
+ info->start[i--] = baseaddr + info->size - 0x00010000;
+ info->start[i--] = baseaddr + info->size - 0x00018000;
+ info->start[i--] = baseaddr + info->size - 0x00020000;
+ for (; i >= 0; i--) {
+ info->start[i] = baseaddr + i * 0x00040000;
+ }
+ }
+
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++) {
+ /* read sector protection at sector address, (A7 .. A0) = 0x02 */
+ if (*(volatile DWORD*)(info->start[i] + 16) & 0x0001000100010001LL) {
+ info->protect[i] = 1; /* D0 = 1 if protected */
+ } else {
+ info->protect[i] = 0;
+ }
+ }
+
+ flash_reset ();
+ return (info->size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+unsigned long flash_init (void)
+{
+ unsigned long size_b0 = 0;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /* Static FLASH Bank configuration here (only one bank) */
+ size_b0 = flash_get_size (CFG_FLASH_BASE, &flash_info[0]);
+ 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);
+ }
+
+ /*
+ * protect monitor and environment sectors
+ */
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
+#endif
+
+#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
+# ifndef CFG_ENV_SIZE
+# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
+# endif
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+#endif
+
+ return (size_b0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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 & FLASH_VENDMASK) {
+ case FLASH_MAN_AMD:
+ printf ("AMD ");
+ break;
+ case FLASH_MAN_FUJ:
+ printf ("FUJITSU ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM800T:
+ printf ("29LV800T (8 M, top sector)\n");
+ break;
+ case FLASH_AM800B:
+ printf ("29LV800T (8 M, bottom sector)\n");
+ break;
+ case FLASH_AM160T:
+ printf ("29LV160T (16 M, top sector)\n");
+ break;
+ case FLASH_AM160B:
+ printf ("29LV160B (16 M, bottom sector)\n");
+ break;
+ case FLASH_AMDL322T:
+ printf ("29DL322T (32 M, top sector)\n");
+ break;
+ case FLASH_AMDL322B:
+ printf ("29DL322B (32 M, bottom sector)\n");
+ break;
+ case FLASH_AMDL323T:
+ printf ("29DL323T (32 M, top sector)\n");
+ break;
+ case FLASH_AMDL323B:
+ printf ("29DL323B (32 M, bottom sector)\n");
+ break;
+ case FLASH_AM640U:
+ printf ("29LV640D (64 M, uniform sector)\n");
+ break;
+ default:
+ printf ("Unknown Chip Type\n");
+ 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");
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+ int flag, prot, sect, l_sect;
+ ulong start, now, last;
+ unsigned long msr;
+ DWORD cmd_erase[6] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
+ 0x0080008000800080LL, 0x00AA00AA00AA00AALL,
+ 0x0055005500550055LL, 0x0030003000300030LL };
+
+ 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;
+ }
+
+ 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");
+ }
+
+ l_sect = -1;
+
+ /* Enable FPU */
+ msr = get_msr();
+ set_msr ( msr | MSR_FP );
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts ();
+
+ write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[0] );
+ write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[1] );
+ write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[2] );
+ write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_erase[3] );
+ write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_erase[4] );
+ udelay (1000);
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ write_via_fpu ((DWORD*)info->start[sect], &cmd_erase[5] );
+ l_sect = sect;
+ }
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts ();
+
+ /* Restore FPU */
+ set_msr (msr);
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ /*
+ * We wait for the last triggered sector
+ */
+ if (l_sect < 0)
+ goto DONE;
+
+ start = get_timer (0);
+ last = start;
+ while ((*(volatile DWORD*)info->start[l_sect] & 0x0080008000800080LL )
+ != 0x0080008000800080LL )
+ {
+ if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ serial_putc ('.');
+ last = now;
+ }
+ }
+
+ DONE:
+ /* reset to read mode */
+ flash_reset ();
+
+ printf (" done\n");
+ return 0;
+}
+
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ ulong dp;
+ static unsigned char bb[8];
+ int i, l, rc, cc = cnt;
+
+ dp = (addr & ~7); /* get lower dword aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - dp) != 0) {
+ for (i = 0; i < 8; i++)
+ bb[i] = (i < l || (i - l) >= cc) ? *(char*)(dp + i) : *src++;
+ if ((rc = write_dword (info, dp, bb)) != 0) {
+ return (rc);
+ }
+ dp += 8;
+ cc -= 8 - l;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cc >= 8) {
+ if ((rc = write_dword (info, dp, src)) != 0) {
+ return (rc);
+ }
+ dp += 8;
+ src += 8;
+ cc -= 8;
+ }
+
+ if (cc <= 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ for (i = 0; i < 8; i++) {
+ bb[i] = (i < cc) ? *src++ : *(char*)(dp + i);
+ }
+ return (write_dword (info, dp, bb));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a dword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
+{
+ ulong start;
+ unsigned long msr;
+ int flag, i;
+ DWORD data;
+ DWORD cmd_write[3] = { 0x00AA00AA00AA00AALL, 0x0055005500550055LL,
+ 0x00A000A000A000A0LL };
+
+ for (data = 0, i = 0; i < 8; i++)
+ data = (data << 8) + *pdata++;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*(DWORD*)dest & data) != data) {
+ return (2);
+ }
+
+ /* Enable FPU */
+ msr = get_msr();
+ set_msr( msr | MSR_FP );
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts ();
+
+ write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[0] );
+ write_via_fpu ((DWORD*)(info->start[0] + (0x02AA << 3)), &cmd_write[1] );
+ write_via_fpu ((DWORD*)(info->start[0] + (0x0555 << 3)), &cmd_write[2] );
+ write_via_fpu ((DWORD*)dest, &data );
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts ();
+
+ /* Restore FPU */
+ set_msr(msr);
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while (*(volatile DWORD*)dest != data ) {
+ if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void write_via_fpu (volatile DWORD* addr, DWORD* data)
+{
+ __asm__ __volatile__ ("lfd 1, 0(%0)"::"r" (data));
+ __asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
+ __asm__ __volatile__ ("eieio");
+}
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