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authorwdenk <wdenk>2003-08-30 00:05:50 +0000
committerwdenk <wdenk>2003-08-30 00:05:50 +0000
commit0cb61d7dddb0d8c087f6df46a74815950668c97b (patch)
tree215dcff4a52d627cc1ee489c4550dbb67356224b /board/adderII/flash.c
parent6f21347d49b1741e4b8247f5e2d3fa83ef169c25 (diff)
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Patch by Raghu Krishnaprasad, 7 Aug 2003:
add support for Adder II MPC852T module
Diffstat (limited to 'board/adderII/flash.c')
-rw-r--r--board/adderII/flash.c501
1 files changed, 501 insertions, 0 deletions
diff --git a/board/adderII/flash.c b/board/adderII/flash.c
new file mode 100644
index 0000000..77ab4f1
--- /dev/null
+++ b/board/adderII/flash.c
@@ -0,0 +1,501 @@
+/*
+ * (C) Copyright 2000-2003
+ * 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
+ */
+/******************************************************************************
+** Notes: AM29LV320DB - 90EI ( 32 Mbit device )
+** Sectors - Eight 8 Kb sector
+** - Sixty three 64 Kb sector
+** Bottom boot sector
+******************************************************************************/
+#include <common.h>
+#include <mpc8xx.h>
+
+
+/******************************************************************************
+** Defines
+******************************************************************************/
+#ifdef CONFIG_ADDERII
+
+#define ADDR0 0x0555
+#define ADDR1 0x02AA
+#define FLASH_WORD_SIZE unsigned short
+
+#endif
+
+#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
+
+/******************************************************************************
+** Global Parameters
+******************************************************************************/
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+/******************************************************************************
+** Function Prototypes
+******************************************************************************/
+static ulong flash_get_size( vu_long *addr, flash_info_t *info );
+
+static int write_word( flash_info_t *info, ulong dest, ulong data );
+
+static void flash_get_offsets( ulong base, flash_info_t *info );
+
+int wait_for_DQ7( flash_info_t *info, int sect );
+
+/******************************************************************************
+** Function : flash_init
+** Param : void
+** Notes : Initializes the Flash Chip
+******************************************************************************/
+ulong flash_init (void)
+{
+ ulong size_b0 = -1;
+ int i;
+ volatile immap_t *immap = (immap_t *) CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+ /* Set Flash to unknown */
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /* Get the Flash Bank Size */
+
+ size_b0 = flash_get_size ((vu_long *) (CFG_FLASH_BASE),
+ &flash_info[0]);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## UNKNOWN Flash on Bank 0 - Size = 0x%08lx = %ldMB\n",
+ size_b0, size_b0 >> 20);
+ }
+
+ /* Remap Flash according to size detected */
+ memctl->memc_or0 = 0xFF800774;
+ memctl->memc_br0 = CFG_BR0_PRELIM;
+
+ /* Setup Flash Sector Offsets */
+
+ flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+ /* Monitor Protection ON - default */
+
+#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
+
+ /* Protect Environment Variables */
+#ifdef CFG_ENV_IS_IN_FLASH
+ flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR,
+ (CFG_ENV_ADDR + CFG_ENV_SIZE - 1), &flash_info[0]);
+#endif
+
+ return size_b0;
+}
+
+/******************************************************************************
+** Function : flash_get_offsets
+** Param : ulong base, flash_into_t *info
+** Notes :
+******************************************************************************/
+static void flash_get_offsets (ulong base, flash_info_t * info)
+{
+ return;
+}
+
+
+/******************************************************************************
+** Function : flash_print_info
+** Param : flash_info_t
+** Notes :
+******************************************************************************/
+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;
+ case FLASH_MAN_BM:
+ printf ("BRIGHT MICRO ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM320B:
+ printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM320T:
+ printf ("AM29LV320T (32 Mbit, top boot 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;
+}
+
+/******************************************************************************
+** Function : flash_get_size
+** Param : vu_long *addr, flash_info_t *info
+** Notes :
+******************************************************************************/
+static ulong flash_get_size (vu_long * addr, flash_info_t * info)
+{
+ short i;
+ FLASH_WORD_SIZE manu_id, dev_id;
+ ulong base = (ulong) addr;
+ volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
+
+ /* Write Auto Select Command and read Manufacturer's ID and Dev ID */
+
+ addr2[ADDR0] = (FLASH_WORD_SIZE) 0xAAAAAAAA;
+ addr2[ADDR1] = (FLASH_WORD_SIZE) 0x55555555;
+ addr2[ADDR0] = (FLASH_WORD_SIZE) 0x90909090;
+
+ manu_id = addr2[0];
+
+ switch (manu_id) {
+ case (FLASH_WORD_SIZE) AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
+ }
+
+ /* Read Device Id */
+ dev_id = addr2[1];
+
+ switch (dev_id) {
+ case (FLASH_WORD_SIZE) AMD_ID_LV320B:
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 71; /* 8 - boot sec + 63 normal */
+ info->size = 0x400000; /* 4MByte */
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ break;
+ }
+
+ /* Set up sector start Addresses */
+
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block
+ ** Eight 8 Kb Boot sectors
+ ** Sixty Three 64Kb sectors
+ */
+ for (i = 0; i < 8; i++) {
+ info->start[i] = base + (i * 0x00002000);
+ }
+ for (i = 8; i < info->sector_count; i++) {
+ info->start[i] = base + (i * 0x00010000) - 0x00070000;
+ }
+ }
+
+ /* Reset To read mode */
+
+ if (info->flash_id != FLASH_UNKNOWN) {
+ addr = (ulong *) info->start[0];
+ *addr = 0xF0F0F0F0;
+ }
+ return (info->size);
+}
+
+/*******************************************************************************
+** Function : flash_erase
+** Param : flash_info_t *info, int s_first, int s_last
+** Notes :
+******************************************************************************/
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+ volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
+ volatile FLASH_WORD_SIZE *addr2;
+ int flag, prot, sect, l_sect;
+ int i;
+
+ 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_UNKNOWN) {
+ printf ("Can't erase unknown flash type - 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");
+ }
+
+ l_sect = -1;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts ();
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last; sect++) {
+
+ if (info->protect[sect] == 0) { /* not protected */
+ addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
+
+ if ((info->flash_id & FLASH_VENDMASK) ==
+ FLASH_MAN_SST) {
+ addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
+ addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
+ addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
+ addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
+ addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
+ addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
+ for (i = 0; i < 50; i++)
+ udelay (1000); /* wait 1 ms */
+ } else {
+ addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
+ addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
+ addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
+ addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
+ addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
+ addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
+ }
+ l_sect = sect;
+ /*
+ * Wait for each sector to complete, it's more
+ * reliable. According to AMD Spec, you must
+ * issue all erase commands within a specified
+ * timeout. This has been seen to fail, especially
+ * if printf()s are included (for debug)!!
+ */
+ wait_for_DQ7 (info, sect);
+ }
+ }
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts ();
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ /* reset to read mode */
+ addr = (FLASH_WORD_SIZE *) info->start[0];
+ addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
+
+ printf (" done\n");
+ return 0;
+}
+
+int wait_for_DQ7 (flash_info_t * info, int sect)
+{
+ ulong start, now, last;
+ volatile FLASH_WORD_SIZE *addr =
+ (FLASH_WORD_SIZE *) (info->start[sect]);
+
+ start = get_timer (0);
+ last = start;
+ while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
+ (FLASH_WORD_SIZE) 0x00800080) {
+ if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ return -1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) {
+ putc ('.');
+ last = now;
+ }
+ }
+ return 0;
+}
+
+
+/******************************************************************************
+** Function : write_buff
+** Param : flash_info_t *info, uchar *src, ulong addr, ulong cnt
+** Notes :
+******************************************************************************/
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int i, l, rc;
+
+ /* get lower word aligned address */
+ wp = (addr & ~3);
+
+ /*
+ * 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 < 4 && cnt > 0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt == 0 && i < 4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *) cp);
+ }
+
+ if ((rc = write_word (info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+ data = 0;
+ for (i = 0; i < 4; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_word (info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ cnt -= 4;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i < 4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *) cp);
+ }
+
+ return (write_word (info, wp, data));
+}
+
+
+/******************************************************************************
+** Function : write_word
+** Param : flash_info_t *info, ulong dest, ulong data
+** Notes :
+******************************************************************************/
+static int write_word (flash_info_t * info, ulong dest, ulong data)
+{
+ volatile FLASH_WORD_SIZE *addr2 =
+ (FLASH_WORD_SIZE *) (info->start[0]);
+ volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
+ volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
+ ulong start;
+ int i;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((volatile FLASH_WORD_SIZE *) dest) &
+ (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
+ return (2);
+ }
+
+ for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
+ int flag;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts ();
+
+ addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
+ addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
+ addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
+
+ dest2[i] = data2[i];
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts ();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
+ (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
+ if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ }
+
+ return (0);
+}