Initial revision

1 files changed, 402 insertions, 0 deletions

diff --git a/board/rsdproto/flash.c b/board/rsdproto/flash.c
new file mode 100644
index 0000000..654012f
--- /dev/null
+++ b/board/rsdproto/flash.c
@@ -0,0 +1,402 @@
+/*
+ * (C) Copyright 2000
+ * Marius Groeger <mgroeger@sysgo.de>
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ *
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Flash Routines for AM290[48]0B devices
+ *
+ *--------------------------------------------------------------------
+ * 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 <mpc8xx.h>
+
+/* flash hardware ids */
+#define VENDOR_AMD     0x0001
+#define AMD_29DL323C_B 0x2253
+
+/* Define this to include autoselect sequence in flash_init(). Does NOT
+ * work when executing from flash itself, so this should be turned
+ * on only when debugging the RAM version.
+ */
+#undef WITH_AUTOSELECT
+
+flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+#if 1
+#define D(x)
+#else
+#define D(x) printf x
+#endif
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+
+static unsigned char write_ull(flash_info_t *info,
+			       unsigned long address,
+			       volatile unsigned long long data);
+
+/* from flash_asm.S */
+extern void ull_write(unsigned long long volatile *address,
+                      unsigned long long volatile *data);
+extern void ull_read(unsigned long long volatile *address,
+                     unsigned long long volatile *data);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+    int i;
+    ulong addr;
+
+#ifdef WITH_AUTOSELECT
+	{
+		unsigned long long *f_addr = (unsigned long long *)PHYS_FLASH;
+		unsigned long long f_command, vendor, device;
+		/* Perform Autoselect */
+		f_command 	= 0x00AA00AA00AA00AAULL;
+		ull_write(&f_addr[0x555], &f_command);
+		f_command 	= 0x0055005500550055ULL;
+		ull_write(&f_addr[0x2AA], &f_command);
+		f_command 	= 0x0090009000900090ULL;
+		ull_write(&f_addr[0x555], &f_command);
+		ull_read(&f_addr[0], &vendor);
+		vendor &= 0xffff;
+		ull_read(&f_addr[1], &device);
+		device &= 0xffff;
+		f_command 	= 0x00F000F000F000F0ULL;
+		ull_write(&f_addr[0x555], &f_command);
+		if (vendor != VENDOR_AMD || device != AMD_29DL323C_B)
+		  return 0;
+	}
+#endif
+
+    /* Init: no FLASHes known */
+    for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+    }
+
+	/* 1st bank: 8 x 32 KB sectors */
+	flash_info[0].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B;
+	flash_info[0].sector_count = 8;
+	flash_info[0].size = flash_info[0].sector_count * 32 * 1024;
+	addr = PHYS_FLASH;
+    for(i = 0; i < flash_info[0].sector_count; i++) {
+		flash_info[0].start[i] = addr;
+		addr += flash_info[0].size / flash_info[0].sector_count;
+	}
+	/* 1st bank: 63 x 256 KB sectors */
+	flash_info[1].flash_id = VENDOR_AMD << 16 | AMD_29DL323C_B;
+	flash_info[1].sector_count = 63;
+	flash_info[1].size = flash_info[1].sector_count * 256 * 1024;
+    for(i = 0; i < flash_info[1].sector_count; i++) {
+		flash_info[1].start[i] = addr;
+		addr += flash_info[1].size / flash_info[1].sector_count;
+	}
+
+	/*
+	 * protect monitor and environment sectors
+	 */
+
+#if CFG_MONITOR_BASE >= PHYS_FLASH
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_MONITOR_BASE,
+		      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+		      &flash_info[0]);
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_MONITOR_BASE,
+		      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+		      &flash_info[1]);
+#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]);
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_ENV_ADDR,
+		      CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+		      &flash_info[1]);
+#endif
+
+    return flash_info[0].size + flash_info[1].size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+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 >> 16) {
+    case VENDOR_AMD:
+		printf ("AMD ");
+		break;
+    default:
+		printf ("Unknown Vendor ");
+		break;
+    }
+
+    switch (info->flash_id & FLASH_TYPEMASK) {
+    case AMD_29DL323C_B:
+		printf ("AM29DL323CB (32 Mbit)\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;
+	unsigned long long volatile *f_addr;
+	unsigned long long volatile f_command;
+
+    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");
+    }
+
+	f_addr 	= (unsigned long long *)info->start[0];
+	f_command 	= 0x00AA00AA00AA00AAULL;
+	ull_write(&f_addr[0x555], &f_command);
+	f_command 	= 0x0055005500550055ULL;
+	ull_write(&f_addr[0x2AA], &f_command);
+	f_command 	= 0x0080008000800080ULL;
+	ull_write(&f_addr[0x555], &f_command);
+	f_command 	= 0x00AA00AA00AA00AAULL;
+	ull_write(&f_addr[0x555], &f_command);
+	f_command 	= 0x0055005500550055ULL;
+	ull_write(&f_addr[0x2AA], &f_command);
+
+    /* Disable interrupts which might cause a timeout here */
+    flag = disable_interrupts();
+
+    /* Start erase on unprotected sectors */
+    for (l_sect = -1, sect = s_first; sect<=s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+
+			f_addr 	=
+			  (unsigned long long *)(info->start[sect]);
+			f_command 	= 0x0030003000300030ULL;
+			ull_write(f_addr, &f_command);
+			l_sect = sect;
+		}
+    }
+
+    /* re-enable interrupts if necessary */
+    if (flag)
+      enable_interrupts();
+
+	start = get_timer (0);
+	do
+	{
+		if (get_timer(start) > CFG_FLASH_ERASE_TOUT)
+		{	/* write reset command, command address is unimportant */
+			/* this command turns the flash back to read mode     */
+			f_addr =
+			  (unsigned long long *)(info->start[l_sect]);
+			f_command 	= 0x00F000F000F000F0ULL;
+			ull_write(f_addr, &f_command);
+			printf (" timeout\n");
+			return 1;
+        }
+	} while(*f_addr != 0xFFFFFFFFFFFFFFFFULL);
+
+    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)
+{
+    unsigned long cp, wp;
+	unsigned long long data;
+    int i, l, rc;
+
+    wp = (addr & ~7);	/* get lower long long aligned address */
+
+    /*
+     * handle unaligned start bytes
+     */
+    if ((l = addr - wp) != 0) {
+		data = 0;
+		for (i=0, cp=wp; i<l; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *)cp);
+		}
+		for (; i<8 && cnt>0; ++i) {
+			data = (data << 8) | *src++;
+			--cnt;
+			++cp;
+		}
+		for (; cnt==0 && i<8; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *)cp);
+		}
+
+		if ((rc = write_ull(info, wp, data)) != 0) {
+			return rc;
+		}
+		wp += 4;
+    }
+
+    /*
+     * handle long long aligned part
+     */
+    while (cnt >= 8) {
+		data = 0;
+		for (i=0; i<8; ++i) {
+			data = (data << 8) | *src++;
+		}
+		if ((rc = write_ull(info, wp, data)) != 0) {
+			return rc;
+		}
+		wp  += 8;
+		cnt -= 8;
+    }
+
+    if (cnt == 0) {
+		return ERR_OK;
+    }
+
+    /*
+     * handle unaligned tail bytes
+     */
+    data = 0;
+    for (i=0, cp=wp; i<8 && cnt>0; ++i, ++cp) {
+		data = (data << 8) | *src++;
+		--cnt;
+    }
+    for (; i<8; ++i, ++cp) {
+		data = (data << 8) | (*(uchar *)cp);
+    }
+
+    return write_ull(info, wp, data);
+}
+
+/*---------------------------------------------------------------------------
+*
+* FUNCTION NAME:  write_ull
+*
+* DESCRIPTION:   writes 8 bytes to flash
+*
+* EXTERNAL EFFECT: nothing
+*
+* PARAMETERS:   32 bit long pointer to address, 64 bit long pointer to data
+*
+* RETURNS: 	0 if OK, 1 if timeout, 4 if parameter error
+*--------------------------------------------------------------------------*/
+
+static unsigned char write_ull(flash_info_t *info,
+							   unsigned long address,
+							   volatile unsigned long long data)
+{
+	static unsigned long long f_command;
+	static unsigned long long *f_addr;
+	ulong start;
+
+	/* address muss be 8-aligned! */
+	if (address & 0x7)
+	  return ERR_ALIGN;
+
+	f_addr 	= (unsigned long long *)info->start[0];
+	f_command 	= 0x00AA00AA00AA00AAULL;
+	ull_write(&f_addr[0x555], &f_command);
+	f_command 	= 0x0055005500550055ULL;
+	ull_write(&f_addr[0x2AA], &f_command);
+	f_command 	= 0x00A000A000A000A0ULL;
+	ull_write(&f_addr[0x555], &f_command);
+
+	f_addr 	= (unsigned long long *)address;
+	f_command 	= data;
+	ull_write(f_addr, &f_command);
+
+	start = get_timer (0);
+	do
+	{
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT)
+		{
+			/* write reset command, command address is unimportant */
+			/* this command turns the flash back to read mode     */
+			f_addr 	= (unsigned long long *)info->start[0];
+			f_command 	= 0x00F000F000F000F0ULL;
+			ull_write(f_addr, &f_command);
+			return ERR_TIMOUT;
+		}
+	} while(*((unsigned long long *)address) != data);
+
+	return 0;
+}