summaryrefslogtreecommitdiff
path: root/board/snmc/qs850/flash.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/snmc/qs850/flash.c')
-rw-r--r--board/snmc/qs850/flash.c617
1 files changed, 617 insertions, 0 deletions
diff --git a/board/snmc/qs850/flash.c b/board/snmc/qs850/flash.c
new file mode 100644
index 0000000..d4e2cbb
--- /dev/null
+++ b/board/snmc/qs850/flash.c
@@ -0,0 +1,617 @@
+/*
+ * (C) Copyright 2003
+ * MuLogic B.V.
+ *
+ * (C) Copyright 2001
+ * 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
+ */
+
+#include <common.h>
+#include <ppc4xx.h>
+#include <asm/u-boot.h>
+#include <asm/processor.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+
+#define FLASH_WORD_SIZE unsigned long
+#define FLASH_ID_MASK 0xFFFFFFFF
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+/* stolen from esteem192e/flash.c */
+ulong flash_get_size (volatile FLASH_WORD_SIZE *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);
+
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+ unsigned long size_b0, size_b1;
+ int i;
+ uint pbcr;
+ unsigned long base_b0, base_b1;
+ volatile FLASH_WORD_SIZE* flash_base;
+
+ /* 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 */
+ /* Test for 8M Flash first */
+ debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_8M_PRELIM);
+ flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_8M_PRELIM);
+ size_b0 = flash_get_size(flash_base, &flash_info[0]);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+ size_b0, size_b0<<20);
+ return 0;
+ }
+
+ if (size_b0 < 8*1024*1024) {
+ /* Not quite 8M, try 4M Flash base address */
+ debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_4M_PRELIM);
+ flash_base = (volatile FLASH_WORD_SIZE*)(FLASH_BASE0_4M_PRELIM);
+ size_b0 = flash_get_size(flash_base, &flash_info[0]);
+ }
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+ size_b0, size_b0<<20);
+ return 0;
+ }
+
+ /* Only one bank */
+ if (CFG_MAX_FLASH_BANKS == 1) {
+ /* Setup offsets */
+ flash_get_offsets ((ulong)flash_base, &flash_info[0]);
+
+ /* Monitor protection ON by default */
+ (void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, &flash_info[0]);
+ size_b1 = 0 ;
+ flash_info[0].size = size_b0;
+ return(size_b0);
+ }
+
+ /* We have 2 banks */
+ size_b1 = flash_get_size(flash_base, &flash_info[1]);
+
+ /* Re-do sizing to get full correct info */
+ if (size_b1) {
+ mtdcr(ebccfga, pb0cr);
+ pbcr = mfdcr(ebccfgd);
+ mtdcr(ebccfga, pb0cr);
+ base_b1 = -size_b1;
+ pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
+ mtdcr(ebccfgd, pbcr);
+ }
+
+ if (size_b0) {
+ mtdcr(ebccfga, pb1cr);
+ pbcr = mfdcr(ebccfgd);
+ mtdcr(ebccfga, pb1cr);
+ base_b0 = base_b1 - size_b0;
+ pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
+ mtdcr(ebccfgd, pbcr);
+ }
+
+ size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]);
+ flash_get_offsets (base_b0, &flash_info[0]);
+
+ /* monitor protection ON by default */
+ (void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, &flash_info[0]);
+
+ if (size_b1) {
+ /* Re-do sizing to get full correct info */
+ size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b1, &flash_info[1]);
+ flash_get_offsets (base_b1, &flash_info[1]);
+
+ /* monitor protection ON by default */
+ (void)flash_protect(FLAG_PROTECT_SET, base_b1+size_b1-CFG_MONITOR_LEN,
+ base_b1+size_b1-1, &flash_info[1]);
+
+ /* monitor protection OFF by default (one is enough) */
+ (void)flash_protect(FLAG_PROTECT_CLEAR, base_b0+size_b0-CFG_MONITOR_LEN,
+ base_b0+size_b0-1, &flash_info[0]);
+ } else {
+ flash_info[1].flash_id = FLASH_UNKNOWN;
+ flash_info[1].sector_count = -1;
+ }
+
+ flash_info[0].size = size_b0;
+ flash_info[1].size = size_b1;
+ return (size_b0 + size_b1);
+}
+
+
+
+/*-----------------------------------------------------------------------
+ This code is specific to the AM29DL163/AM29DL232 for the QS850/QS823.
+ */
+
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+ long large_sect_size;
+ long small_sect_size;
+
+ /* set up sector start adress table */
+ large_sect_size = info->size / (info->sector_count - 8 + 1);
+ small_sect_size = large_sect_size / 8;
+
+ if (info->flash_id & FLASH_BTYPE) {
+
+ /* set sector offsets for bottom boot block type */
+ for (i = 0; i < 7; i++) {
+ info->start[i] = base;
+ base += small_sect_size;
+ }
+
+ for (; i < info->sector_count; i++) {
+ info->start[i] = base;
+ base += large_sect_size;
+ }
+ }
+ else
+ {
+ /* set sector offsets for top boot block type */
+ for (i = 0; i < (info->sector_count - 8); i++) {
+ info->start[i] = base;
+ base += large_sect_size;
+ }
+
+ for (; i < info->sector_count; i++) {
+ info->start[i] = base;
+ base += small_sect_size;
+ }
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+void flash_print_info (flash_info_t *info)
+{
+ int i;
+ uchar *boottype;
+ uchar botboot[]=", bottom boot sect)\n";
+ uchar topboot[]=", top boot sector)\n";
+
+ 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_SST:
+ printf ("SST ");
+ break;
+ case FLASH_MAN_STM:
+ printf ("STM ");
+ break;
+ case FLASH_MAN_INTEL:
+ printf ("INTEL ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ if (info->flash_id & 0x0001 ) {
+ boottype = botboot;
+ } else {
+ boottype = topboot;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM160B:
+ printf ("AM29LV160B (16 Mbit%s",boottype);
+ break;
+ case FLASH_AM160T:
+ printf ("AM29LV160T (16 Mbit%s",boottype);
+ break;
+ case FLASH_AMDL163T:
+ printf ("AM29DL163T (16 Mbit%s",boottype);
+ break;
+ case FLASH_AMDL163B:
+ printf ("AM29DL163B (16 Mbit%s",boottype);
+ break;
+ case FLASH_AM320B:
+ printf ("AM29LV320B (32 Mbit%s",boottype);
+ break;
+ case FLASH_AM320T:
+ printf ("AM29LV320T (32 Mbit%s",boottype);
+ break;
+ case FLASH_AMDL323T:
+ printf ("AM29DL323T (32 Mbit%s",boottype);
+ break;
+ case FLASH_AMDL323B:
+ printf ("AM29DL323B (32 Mbit%s",boottype);
+ break;
+ case FLASH_AMDL322T:
+ printf ("AM29DL322T (32 Mbit%s",boottype);
+ 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;
+}
+
+
+/*-----------------------------------------------------------------------
+ * The following code cannot be run from FLASH!
+ */
+ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
+{
+ short i;
+ ulong base = (ulong)addr;
+ FLASH_WORD_SIZE value;
+
+ /* Write auto select command: read Manufacturer ID */
+
+ /*
+ * Note: if it is an AMD flash and the word at addr[0000]
+ * is 0x00890089 this routine will think it is an Intel
+ * flash device and may(most likely) cause trouble.
+ */
+
+ addr[0x0000] = 0x00900090;
+ if(addr[0x0000] != 0x00890089){
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00900090;
+ }
+ value = addr[0];
+
+ switch (value) {
+ case (AMD_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case (FUJ_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case (STM_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_STM;
+ break;
+ case (SST_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_SST;
+ break;
+ case (INTEL_MANUFACT & FLASH_ID_MASK):
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ value = addr[1]; /* device ID */
+
+ switch (value) {
+ case (AMD_ID_LV160T & FLASH_ID_MASK):
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case (AMD_ID_LV160B & FLASH_ID_MASK):
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case (AMD_ID_DL163T & FLASH_ID_MASK):
+ info->flash_id += FLASH_AMDL163T;
+ info->sector_count = 39;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case (AMD_ID_DL163B & FLASH_ID_MASK):
+ info->flash_id += FLASH_AMDL163B;
+ info->sector_count = 39;
+ info->size = 0x00400000;
+ break; /* => 4 MB */
+
+ case (AMD_ID_DL323T & FLASH_ID_MASK):
+ info->flash_id += FLASH_AMDL323T;
+ info->sector_count = 71;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ case (AMD_ID_DL323B & FLASH_ID_MASK):
+ info->flash_id += FLASH_AMDL323B;
+ info->sector_count = 71;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ case (AMD_ID_DL322T & FLASH_ID_MASK):
+ info->flash_id += FLASH_AMDL322T;
+ info->sector_count = 71;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ default:
+ /* FIXME*/
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+ }
+
+ flash_get_offsets(base, info);
+
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++) {
+ /* read sector protection at sector address, (A7 .. A0) = 0x02 */
+ /* D0 = 1 if protected */
+ addr = (volatile FLASH_WORD_SIZE *)(info->start[i]);
+ info->protect[i] = addr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ addr = (volatile FLASH_WORD_SIZE *)info->start[0];
+ *addr = (0x00FF00FF & FLASH_ID_MASK); /* reset bank */
+ }
+
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ volatile FLASH_WORD_SIZE *addr=(volatile FLASH_WORD_SIZE*)(info->start[0]);
+ int flag, prot, sect, l_sect;
+ ulong start, now, last;
+ int rcode = 0;
+
+ 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) ||
+ (info->flash_id > FLASH_AMD_COMP) ) {
+ 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();
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00800080;
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (volatile FLASH_WORD_SIZE *)(info->start[sect]);
+ addr[0] = (0x00300030 & FLASH_ID_MASK);
+ l_sect = sect;
+ }
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* 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;
+ addr = (volatile FLASH_WORD_SIZE*)(info->start[l_sect]);
+ while ((addr[0] & (0x00800080&FLASH_ID_MASK)) !=
+ (0x00800080&FLASH_ID_MASK) )
+ {
+ 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 */
+ addr = (volatile FLASH_WORD_SIZE *)info->start[0];
+ addr[0] = (0x00F000F0 & FLASH_ID_MASK); /* reset bank */
+
+ printf (" done\n");
+ return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * 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 cp, wp, data;
+ int l;
+ int i, rc;
+
+ wp = (addr & ~3); /* get lower word 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<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));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data)
+{
+ vu_long *addr = (vu_long*)(info->start[0]);
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_long *)dest) & data) != data) {
+ return (2);
+ }
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* AMD stuff */
+ addr[0x0555] = 0x00AA00AA;
+ addr[0x02AA] = 0x00550055;
+ addr[0x0555] = 0x00A000A0;
+
+ *((vu_long *)dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer(0);
+
+ while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+
+ return (0);
+}
generated by cgit v1.1 at 2024-12-12 13:42:21 +0000