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-rw-r--r--board/mvs1/flash.c719
1 files changed, 719 insertions, 0 deletions
diff --git a/board/mvs1/flash.c b/board/mvs1/flash.c
new file mode 100644
index 0000000..75d9048
--- /dev/null
+++ b/board/mvs1/flash.c
@@ -0,0 +1,719 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Changes for MATRIX Vision MVsensor (C) Copyright 2001
+ * MATRIX Vision GmbH / hg, info@matrix-vision.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>
+
+#undef MVDEBUG
+#ifdef MVDEBUG
+#define mvdebug debug
+#else
+#define mvdebug(p) do {} while (0)
+#endif
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+
+#ifdef CONFIG_MVS_16BIT_FLASH
+ #define FLASH_DATA_MASK 0xffff
+ #define FLASH_SHIFT 0
+#else
+ #define FLASH_DATA_MASK 0xffffffff
+ #define FLASH_SHIFT 1
+#endif
+
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_long *address, 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)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+ unsigned long 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 */
+
+ 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);
+ }
+
+#if defined (FLASH_BASE1_PRELIM)
+ size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
+
+ 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);
+ }
+#else
+ size_b1 = 0;
+#endif
+
+ /* Remap FLASH according to real size */
+ memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
+#ifdef CONFIG_MVS_16BIT_FLASH
+ memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;
+#else
+ memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_32 | BR_MS_GPCM | BR_V;
+#endif
+
+ /* Re-do sizing to get full correct info */
+ size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
+
+ flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_FLASH_BASE,
+ CFG_FLASH_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[0]);
+
+ if (size_b1) {
+ memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
+#ifdef CONFIG_MVS_16BIT_FLASH
+ memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
+ BR_PS_16 | BR_MS_GPCM | BR_V;
+#else
+ memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
+ BR_PS_32 | BR_MS_GPCM | BR_V;
+#endif
+ /* Re-do sizing to get full correct info */
+ size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
+ &flash_info[1]);
+
+ flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);
+
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_FLASH_BASE,
+ CFG_FLASH_BASE+CFG_MONITOR_LEN-1,
+ &flash_info[1]);
+ } else {
+ memctl->memc_br1 = 0; /* invalidate bank */
+
+ 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);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+
+ /* set up sector start address table */
+ if (info->flash_id & FLASH_BTYPE)
+ { /* bottom boot sector types - these are the useful ones! */
+ /* set sector offsets for bottom boot block type */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320B)
+ { /* AMDLV320B has 8 x 8k bottom boot sectors */
+ for (i = 0; i < 8; i++) /* +8k */
+ info->start[i] = base + (i * (0x00002000 << FLASH_SHIFT));
+ for (; i < info->sector_count; i++) /* +64k */
+ info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT)) - (0x00070000 << FLASH_SHIFT);
+ }
+ else
+ { /* other types have 4 bottom boot sectors (16,8,8,32) */
+ i = 0;
+ info->start[i++] = base + 0x00000000; /* - */
+ info->start[i++] = base + (0x00004000 << FLASH_SHIFT); /* +16k */
+ info->start[i++] = base + (0x00006000 << FLASH_SHIFT); /* +8k */
+ info->start[i++] = base + (0x00008000 << FLASH_SHIFT); /* +8k */
+ info->start[i++] = base + (0x00010000 << FLASH_SHIFT); /* +32k */
+ for (; i < info->sector_count; i++) /* +64k */
+ info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT)) - (0x00030000 << FLASH_SHIFT);
+ }
+ }
+ else
+ { /* top boot sector types - not so useful */
+ /* set sector offsets for top boot block type */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM320T)
+ { /* AMDLV320T has 8 x 8k top boot sectors */
+ for (i = 0; i < info->sector_count - 8; i++) /* +64k */
+ info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT));
+ for (; i < info->sector_count; i++) /* +8k */
+ info->start[i] = base + (i * (0x00002000 << FLASH_SHIFT));
+ }
+ else
+ { /* other types have 4 top boot sectors (32,8,8,16) */
+ for (i = 0; i < info->sector_count - 4; i++) /* +64k */
+ info->start[i] = base + (i * (0x00010000 << FLASH_SHIFT));
+
+ info->start[i++] = base + info->size - (0x00010000 << FLASH_SHIFT); /* -32k */
+ info->start[i++] = base + info->size - (0x00008000 << FLASH_SHIFT); /* -8k */
+ info->start[i++] = base + info->size - (0x00006000 << FLASH_SHIFT); /* -8k */
+ info->start[i] = base + info->size - (0x00004000 << FLASH_SHIFT); /* -16k */
+ }
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_STM: printf ("ST "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
+ break;
+ case FLASH_STMW320DB: printf ("M29W320B (32 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_STMW320DT: printf ("M29W320T (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");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+#define AMD_ID_LV160T_MVS (AMD_ID_LV160T & FLASH_DATA_MASK)
+#define AMD_ID_LV160B_MVS (AMD_ID_LV160B & FLASH_DATA_MASK)
+#define AMD_ID_LV320T_MVS (AMD_ID_LV320T & FLASH_DATA_MASK)
+#define AMD_ID_LV320B_MVS (AMD_ID_LV320B & FLASH_DATA_MASK)
+#define STM_ID_W320DT_MVS (STM_ID_29W320DT & FLASH_DATA_MASK)
+#define STM_ID_W320DB_MVS (STM_ID_29W320DB & FLASH_DATA_MASK)
+#define AMD_MANUFACT_MVS (AMD_MANUFACT & FLASH_DATA_MASK)
+#define FUJ_MANUFACT_MVS (FUJ_MANUFACT & FLASH_DATA_MASK)
+#define STM_MANUFACT_MVS (STM_MANUFACT & FLASH_DATA_MASK)
+
+#define AUTOSELECT_ADDR1 0x0555
+#define AUTOSELECT_ADDR2 0x02AA
+#define AUTOSELECT_ADDR3 AUTOSELECT_ADDR1
+
+#define AUTOSELECT_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
+#define AUTOSELECT_DATA2 (0x00550055 & FLASH_DATA_MASK)
+#define AUTOSELECT_DATA3 (0x00900090 & FLASH_DATA_MASK)
+
+#define RESET_BANK_DATA (0x00F000F0 & FLASH_DATA_MASK)
+
+static ulong flash_get_size (vu_long *address, flash_info_t *info)
+{
+ short i;
+#ifdef CONFIG_MVS_16BIT_FLASH
+ ushort value;
+ vu_short *addr = (vu_short *)address;
+#else
+ ulong value;
+ vu_long *addr = (vu_long *)address;
+#endif
+ ulong base = (ulong)address;
+
+ /* Write auto select command: read Manufacturer ID */
+ addr[AUTOSELECT_ADDR1] = AUTOSELECT_DATA1;
+ addr[AUTOSELECT_ADDR2] = AUTOSELECT_DATA2;
+ addr[AUTOSELECT_ADDR3] = AUTOSELECT_DATA3;
+
+ value = addr[0]; /* manufacturer ID */
+ switch (value) {
+ case AMD_MANUFACT_MVS:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case FUJ_MANUFACT_MVS:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case STM_MANUFACT_MVS:
+ info->flash_id = FLASH_MAN_STM;
+ 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_MVS:
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 37;
+ info->size = (0x00200000 << FLASH_SHIFT);
+ break; /* => 2 or 4 MB */
+
+ case AMD_ID_LV160B_MVS:
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 37;
+ info->size = (0x00200000 << FLASH_SHIFT);
+ break; /* => 2 or 4 MB */
+
+ case AMD_ID_LV320T_MVS:
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 71;
+ info->size = (0x00400000 << FLASH_SHIFT);
+ break; /* => 4 or 8 MB */
+
+ case AMD_ID_LV320B_MVS:
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 71;
+ info->size = (0x00400000 << FLASH_SHIFT);
+ break; /* => 4 or 8MB */
+
+ case STM_ID_W320DT_MVS:
+ info->flash_id += FLASH_STMW320DT;
+ info->sector_count = 67;
+ info->size = (0x00400000 << FLASH_SHIFT);
+ break; /* => 4 or 8 MB */
+
+ case STM_ID_W320DB_MVS:
+ info->flash_id += FLASH_STMW320DB;
+ info->sector_count = 67;
+ info->size = (0x00400000 << FLASH_SHIFT);
+ break; /* => 4 or 8MB */
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (0); /* => no or unknown flash */
+
+ }
+
+ /* set up sector start address table */
+ 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 */
+#ifdef CONFIG_MVS_16BIT_FLASH
+ addr = (vu_short *)(info->start[i]);
+#else
+ addr = (vu_long *)(info->start[i]);
+#endif
+ info->protect[i] = addr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+#ifdef CONFIG_MVS_16BIT_FLASH
+ addr = (vu_short *)info->start[0];
+#else
+ addr = (vu_long *)info->start[0];
+#endif
+ *addr = RESET_BANK_DATA; /* reset bank */
+ }
+
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+#define ERASE_ADDR1 0x0555
+#define ERASE_ADDR2 0x02AA
+#define ERASE_ADDR3 ERASE_ADDR1
+#define ERASE_ADDR4 ERASE_ADDR1
+#define ERASE_ADDR5 ERASE_ADDR2
+
+#define ERASE_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
+#define ERASE_DATA2 (0x00550055 & FLASH_DATA_MASK)
+#define ERASE_DATA3 (0x00800080 & FLASH_DATA_MASK)
+#define ERASE_DATA4 ERASE_DATA1
+#define ERASE_DATA5 ERASE_DATA2
+
+#define ERASE_SECTOR_DATA (0x00300030 & FLASH_DATA_MASK)
+#define ERASE_CHIP_DATA (0x00100010 & FLASH_DATA_MASK)
+#define ERASE_CONFIRM_DATA (0x00800080 & FLASH_DATA_MASK)
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+#ifdef CONFIG_MVS_16BIT_FLASH
+ vu_short *addr = (vu_short *)(info->start[0]);
+#else
+ vu_long *addr = (vu_long *)(info->start[0]);
+#endif
+ 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[ERASE_ADDR1] = ERASE_DATA1;
+ addr[ERASE_ADDR2] = ERASE_DATA2;
+ addr[ERASE_ADDR3] = ERASE_DATA3;
+ addr[ERASE_ADDR4] = ERASE_DATA4;
+ addr[ERASE_ADDR5] = ERASE_DATA5;
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+#ifdef CONFIG_MVS_16BIT_FLASH
+ addr = (vu_short *)(info->start[sect]);
+#else
+ addr = (vu_long *)(info->start[sect]);
+#endif
+ addr[0] = ERASE_SECTOR_DATA;
+ 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;
+#ifdef CONFIG_MVS_16BIT_FLASH
+ addr = (vu_short *)(info->start[l_sect]);
+#else
+ addr = (vu_long *)(info->start[l_sect]);
+#endif
+ while ((addr[0] & ERASE_CONFIRM_DATA) != ERASE_CONFIRM_DATA) {
+ 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 */
+#ifdef CONFIG_MVS_16BIT_FLASH
+ addr = (vu_short *)info->start[0];
+#else
+ addr = (vu_long *)info->start[0];
+#endif
+ addr[0] = RESET_BANK_DATA; /* reset bank */
+
+ 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)
+{
+#define BUFF_INC 4
+ ulong cp, wp, data;
+ int i, l, rc;
+
+ mvdebug (("+write_buff %p ==> 0x%08lx, count = 0x%08lx\n", src, addr, cnt));
+
+ wp = (addr & ~3); /* get lower word aligned address */
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - wp) != 0) {
+ mvdebug ((" handle unaligned start bytes (cnt = 0x%08%lx)\n", cnt));
+ data = 0;
+ for (i=0, cp=wp; i<l; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+ for (; i<BUFF_INC && cnt>0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt==0 && i<BUFF_INC; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += BUFF_INC;
+ }
+
+ /*
+ * handle (half)word aligned part
+ */
+ mvdebug ((" handle word aligned part (cnt = 0x%08%lx)\n", cnt));
+ while (cnt >= BUFF_INC) {
+ data = 0;
+ for (i=0; i<BUFF_INC; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += BUFF_INC;
+ cnt -= BUFF_INC;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ mvdebug ((" handle unaligned tail bytes (cnt = 0x%08%lx)\n", cnt));
+ data = 0;
+ for (i=0, cp=wp; i<BUFF_INC && cnt>0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i<BUFF_INC; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ return (write_word(info, wp, data));
+}
+
+#define WRITE_ADDR1 0x0555
+#define WRITE_ADDR2 0x02AA
+#define WRITE_ADDR3 WRITE_ADDR1
+
+#define WRITE_DATA1 (0x00AA00AA & FLASH_DATA_MASK)
+#define WRITE_DATA2 (0x00550055 & FLASH_DATA_MASK)
+#define WRITE_DATA3 (0x00A000A0 & FLASH_DATA_MASK)
+
+#define WRITE_CONFIRM_DATA ERASE_CONFIRM_DATA
+
+#ifndef CONFIG_MVS_16BIT_FLASH
+/*-----------------------------------------------------------------------
+ * 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;
+
+ mvdebug (("+write_word (to 0x%08lx)\n", dest));
+ /* 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();
+
+ addr[WRITE_ADDR1] = WRITE_DATA1;
+ addr[WRITE_ADDR2] = WRITE_DATA2;
+ addr[WRITE_ADDR3] = WRITE_DATA3;
+
+ *((vu_long *)dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ addr = (vu_long *)dest;
+ while ((*addr & WRITE_CONFIRM_DATA) != (data & WRITE_CONFIRM_DATA)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+
+ mvdebug (("-write_word\n"));
+ return (0);
+}
+#else /* CONFIG_MVS_16BIT_FLASH */
+/*-----------------------------------------------------------------------
+ * Write a halfword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_halfword (flash_info_t *info, ulong dest, ushort data)
+{
+ vu_short *addr = (vu_short *)(info->start[0]);
+ ulong start;
+ int flag;
+
+ mvdebug (("+write_halfword (to 0x%08lx)\n", dest));
+ /* Check if Flash is (sufficiently) erased */
+ if ((*((vu_short *)dest) & data) != data) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ addr[WRITE_ADDR1] = WRITE_DATA1;
+ addr[WRITE_ADDR2] = WRITE_DATA2;
+ addr[WRITE_ADDR3] = WRITE_DATA3;
+
+ *((vu_short *)dest) = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ addr = (vu_short *)dest;
+ while ((*addr & WRITE_CONFIRM_DATA) != (data & WRITE_CONFIRM_DATA)) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ return (1);
+ }
+ }
+ mvdebug (("-write_halfword\n"));
+ return (0);
+}
+
+
+/*-----------------------------------------------------------------------
+ * 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)
+{
+ int result = 0;
+
+ if (write_halfword (info, dest, (data & ~FLASH_DATA_MASK) >> 16) == 0)
+ {
+ dest += 2;
+ data = data & FLASH_DATA_MASK;
+ result = write_halfword (info, dest, data);
+ }
+ return result;
+}
+#endif
+/*-----------------------------------------------------------------------
+ */
generated by cgit v1.1 at 2024-11-16 05:34:45 +0000