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-rw-r--r--board/rsdproto/flash.c402
1 files changed, 402 insertions, 0 deletions
diff --git a/board/rsdproto/flash.c b/board/rsdproto/flash.c
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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;
+}
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