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-rw-r--r--board/siemens/pcu_e/flash.c700
1 files changed, 700 insertions, 0 deletions
diff --git a/board/siemens/pcu_e/flash.c b/board/siemens/pcu_e/flash.c
new file mode 100644
index 0000000..b8c0df7
--- /dev/null
+++ b/board/siemens/pcu_e/flash.c
@@ -0,0 +1,700 @@
+/*
+ * (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 <mpc8xx.h>
+
+#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
+
+/*---------------------------------------------------------------------*/
+#undef DEBUG_FLASH
+
+#ifdef DEBUG_FLASH
+#define DEBUGF(fmt,args...) printf(fmt ,##args)
+#else
+#define DEBUGF(fmt,args...)
+#endif
+/*---------------------------------------------------------------------*/
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+/*-----------------------------------------------------------------------
+ *
+ * The PCU E uses an address map where flash banks are aligned top
+ * down, so that the "first" flash bank ends at top of memory, and
+ * the monitor entry point is at address (0xFFF00100). The second
+ * flash bank is mapped immediately below bank 0.
+ *
+ * This is NOT in conformance to the "official" memory map!
+ *
+ */
+
+#define PCU_MONITOR_BASE ( (flash_info[0].start[0] + flash_info[0].size - 1) \
+ - (0xFFFFFFFF - CFG_MONITOR_BASE) )
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+ unsigned long base, size_b0, size_b1;
+ 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 - FIXME XXX */
+
+ /*
+ * Warning:
+ *
+ * Since the PCU E memory map assigns flash banks top down,
+ * we swap the numbering later if both banks are equipped,
+ * so they look like a contiguous area of memory.
+ */
+ DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
+
+ size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &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);
+ }
+
+ DEBUGF("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE6_PRELIM);
+ size_b1 = flash_get_size((vu_long *)FLASH_BASE6_PRELIM, &flash_info[1]);
+
+ DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n", size_b0, size_b1);
+
+ if (size_b1 > size_b0) {
+ printf ("## ERROR: "
+ "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
+ size_b1, size_b1<<20,
+ size_b0, size_b0<<20
+ );
+ flash_info[0].flash_id = FLASH_UNKNOWN;
+ flash_info[1].flash_id = FLASH_UNKNOWN;
+ flash_info[0].sector_count = -1;
+ flash_info[1].sector_count = -1;
+ flash_info[0].size = 0;
+ flash_info[1].size = 0;
+ return (0);
+ }
+
+ DEBUGF ("## Before remap: "
+ "BR0: 0x%08x OR0: 0x%08x "
+ "BR6: 0x%08x OR6: 0x%08x\n",
+ memctl->memc_br0, memctl->memc_or0,
+ memctl->memc_br6, memctl->memc_or6);
+
+ /* Remap FLASH according to real size */
+ base = 0 - size_b0;
+ memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
+ memctl->memc_br0 = (base & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;
+
+ DEBUGF("## BR0: 0x%08x OR0: 0x%08x\n",
+ memctl->memc_br0, memctl->memc_or0);
+
+ /* Re-do sizing to get full correct info */
+ size_b0 = flash_get_size((vu_long *)base, &flash_info[0]);
+ base = 0 - size_b0;
+
+ flash_info[0].size = size_b0;
+
+ flash_get_offsets (base, &flash_info[0]);
+
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ PCU_MONITOR_BASE,
+ PCU_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[0]);
+
+#ifdef CFG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+ &flash_info[0]);
+#endif
+
+ if (size_b1) {
+ flash_info_t tmp_info;
+
+ memctl->memc_or6 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
+ memctl->memc_br6 = ((base - size_b1) & BR_BA_MSK) |
+ BR_PS_16 | BR_MS_GPCM | BR_V;
+
+ DEBUGF("## New BR6: 0x%08x OR6: 0x%08x\n",
+ memctl->memc_br6, memctl->memc_or6);
+
+ /* Re-do sizing to get full correct info */
+ size_b1 = flash_get_size((vu_long *)(base - size_b1),
+ &flash_info[1]);
+ base -= size_b1;
+
+ flash_get_offsets (base, &flash_info[1]);
+
+ flash_info[1].size = size_b1;
+
+#ifdef CFG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
+ &flash_info[1]);
+#endif
+ /*
+ * Swap bank numbers so that addresses are in ascending order
+ */
+ tmp_info = flash_info[0];
+ flash_info[0] = flash_info[1];
+ flash_info[1] = tmp_info;
+ } else {
+ memctl->memc_br1 = 0; /* invalidate bank */
+
+ flash_info[1].flash_id = FLASH_UNKNOWN;
+ flash_info[1].sector_count = -1;
+ }
+
+
+ DEBUGF("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
+
+ return (size_b0 + size_b1);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+ short n;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return;
+ }
+
+ if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD) {
+ return;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AMDL322T:
+ case FLASH_AMDL323T:
+ case FLASH_AMDL324T:
+ /* set sector offsets for top boot block type */
+
+ base += info->size;
+ i = info->sector_count;
+ for (n=0; n<8; ++n) { /* 8 x 8k boot sectors */
+ base -= 8 << 10;
+ --i;
+ info->start[i] = base;
+ }
+ while (i > 0) { /* 64k regular sectors */
+ base -= 64 << 10;
+ --i;
+ info->start[i] = base;
+ }
+ return;
+ case FLASH_AMDL322B:
+ case FLASH_AMDL323B:
+ case FLASH_AMDL324B:
+ /* set sector offsets for bottom boot block type */
+ for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
+ info->start[i] = base;
+ base += 8 << 10;
+ }
+ while (base < info->size) { /* 64k regular sectors */
+ info->start[i] = base;
+ base += 64 << 10;
+ ++i;
+ }
+ return;
+ case FLASH_AMDL640:
+ /* set sector offsets for dual boot block type */
+ for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
+ info->start[i] = base;
+ base += 8 << 10;
+ }
+ n = info->sector_count - 8;
+ while (i < n) { /* 64k regular sectors */
+ info->start[i] = base;
+ base += 64 << 10;
+ ++i;
+ }
+ while (i < info->sector_count) { /* 8 x 8k boot sectors */
+ info->start[i] = base;
+ base += 8 << 10;
+ ++i;
+ }
+ return;
+ default:
+ return;
+ }
+ /* NOTREACHED */
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_AMDL322B: printf ("AM29DL322B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AMDL322T: printf ("AM29DL322T (32 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AMDL323B: printf ("AM29DL323B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AMDL323T: printf ("AM29DL323T (32 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AMDL324B: printf ("AM29DL324B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AMDL324T: printf ("AM29DL324T (32 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AMDL640: printf ("AM29DL640D (64 Mbit, dual boot sector)\n");
+ break;
+ default: printf ("Unknown Chip Type 0x%lX\n",
+ info->flash_id);
+ 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!
+ */
+
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+ short i;
+ ushort value;
+ vu_short *saddr = (vu_short *)addr;
+
+ /* Write auto select command: read Manufacturer ID */
+ saddr[0x0555] = 0x00AA;
+ saddr[0x02AA] = 0x0055;
+ saddr[0x0555] = 0x0090;
+
+ value = saddr[0];
+
+ DEBUGF("Manuf. ID @ 0x%08lx: 0x%04x\n", (ulong)addr, value);
+
+ switch (value) {
+ case (AMD_MANUFACT & 0xFFFF):
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case (FUJ_MANUFACT & 0xFFFF):
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ default:
+ DEBUGF("Unknown Manufacturer ID\n");
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ value = saddr[1]; /* device ID */
+
+ DEBUGF("Device ID @ 0x%08lx: 0x%04x\n", (ulong)(&addr[1]), value);
+
+ switch (value) {
+
+ case (AMD_ID_DL322T & 0xFFFF):
+ info->flash_id += FLASH_AMDL322T;
+ info->sector_count = 71;
+ info->size = 0x00400000;
+ break; /* => 8 MB */
+
+ case (AMD_ID_DL322B & 0xFFFF):
+ info->flash_id += FLASH_AMDL322B;
+ info->sector_count = 71;
+ info->size = 0x00400000;
+ break; /* => 8 MB */
+
+ case (AMD_ID_DL323T & 0xFFFF):
+ info->flash_id += FLASH_AMDL323T;
+ info->sector_count = 71;
+ info->size = 0x00400000;
+ break; /* => 8 MB */
+
+ case (AMD_ID_DL323B & 0xFFFF):
+ info->flash_id += FLASH_AMDL323B;
+ info->sector_count = 71;
+ info->size = 0x00400000;
+ break; /* => 8 MB */
+
+ case (AMD_ID_DL324T & 0xFFFF):
+ info->flash_id += FLASH_AMDL324T;
+ info->sector_count = 71;
+ info->size = 0x00400000;
+ break; /* => 8 MB */
+
+ case (AMD_ID_DL324B & 0xFFFF):
+ info->flash_id += FLASH_AMDL324B;
+ info->sector_count = 71;
+ info->size = 0x00400000;
+ break; /* => 8 MB */
+ case (AMD_ID_DL640 & 0xFFFF):
+ info->flash_id += FLASH_AMDL640;
+ info->sector_count = 142;
+ info->size = 0x00800000;
+ break;
+ default:
+ DEBUGF("Unknown Device ID\n");
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+
+ }
+
+ flash_get_offsets ((ulong)addr, info);
+
+ /* check for protected sectors */
+ for (i = 0; i < info->sector_count; i++) {
+#if 0
+ /* read sector protection at sector address, (A7 .. A0) = 0x02 */
+ /* D0 = 1 if protected */
+ saddr = (vu_short *)(info->start[i]);
+ info->protect[i] = saddr[2] & 1;
+#else
+ info->protect[i] =0;
+#endif
+ }
+
+ if (info->sector_count > CFG_MAX_FLASH_SECT) {
+ printf ("** ERROR: sector count %d > max (%d) **\n",
+ info->sector_count, CFG_MAX_FLASH_SECT);
+ info->sector_count = CFG_MAX_FLASH_SECT;
+ }
+
+ saddr = (vu_short *)info->start[0];
+ *saddr = 0x00F0; /* restore read mode */
+
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ vu_short *addr = (vu_short*)(info->start[0]);
+ int flag, prot, sect, l_sect;
+ ulong start, now, last;
+
+ 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 %08lx - aborted\n",
+ info->flash_id);
+ 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] = 0x00AA;
+ addr[0x02AA] = 0x0055;
+ addr[0x0555] = 0x0080;
+ addr[0x0555] = 0x00AA;
+ addr[0x02AA] = 0x0055;
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_short*)(info->start[sect]);
+ addr[0] = 0x0030;
+ 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 = (vu_short*)(info->start[l_sect]);
+ while ((addr[0] & 0x0080) != 0x0080) {
+ 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 */
+ putc ('.');
+ last = now;
+ }
+ }
+
+DONE:
+ /* reset to read mode */
+ addr = (vu_short *)info->start[0];
+ addr[0] = 0x00F0; /* reset bank */
+
+ printf (" done\n");
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+#define FLASH_WIDTH 2 /* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int i, l, rc;
+
+ wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ if ((rc = write_data(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += FLASH_WIDTH;
+ }
+
+ /*
+ * handle FLASH_WIDTH aligned part
+ */
+ while (cnt >= FLASH_WIDTH) {
+ data = 0;
+ for (i=0; i<FLASH_WIDTH; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_data(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += FLASH_WIDTH;
+ cnt -= FLASH_WIDTH;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i<FLASH_WIDTH; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ return (write_data(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, ulong data)
+{
+ vu_short *addr = (vu_short*)(info->start[0]);
+ vu_short *sdest = (vu_short *)dest;
+ ushort sdata = (ushort)data;
+ ushort sval;
+ ulong start, passed;
+ int flag, rc;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*sdest & sdata) != sdata) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[0x0555] = 0x00AA;
+ addr[0x02AA] = 0x0055;
+ addr[0x0555] = 0x00A0;
+
+#ifdef WORKAROUND_FOR_BROKEN_HARDWARE
+ /* work around the timeout bugs */
+ udelay(20);
+#endif
+
+ *sdest = sdata;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ rc = 0;
+ /* data polling for D7 */
+ start = get_timer (0);
+
+ for (passed=0; passed < CFG_FLASH_WRITE_TOUT; passed=get_timer(start)) {
+
+ sval = *sdest;
+
+ if ((sval & 0x0080) == (sdata & 0x0080))
+ break;
+
+ if ((sval & 0x0020) == 0) /* DQ5: Timeout? */
+ continue;
+
+ sval = *sdest;
+
+ if ((sval & 0x0080) != (sdata & 0x0080))
+ rc = 1;
+
+ break;
+ }
+
+ if (rc) {
+ DEBUGF ("Program cycle failed @ addr 0x%08lX: val %04X data %04X\n",
+ dest, sval, sdata);
+ }
+
+ if (passed >= CFG_FLASH_WRITE_TOUT) {
+ DEBUGF ("Timeout @ addr 0x%08lX: val %04X data %04X\n",
+ dest, sval, sdata);
+ rc = 1;
+ }
+
+ /* reset to read mode */
+ addr = (vu_short *)info->start[0];
+ addr[0] = 0x00F0; /* reset bank */
+
+ return (rc);
+}
+
+/*-----------------------------------------------------------------------
+ */
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