Add support for wrPPMC7xx/74xx boards

  Patch from Richard Danter, 12 Aug 2005

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..1cbcadc
--- /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");
+}