summaryrefslogtreecommitdiff
path: root/board/Marvell/common/flash.c
diff options
context:
space:
mode:
Diffstat (limited to 'board/Marvell/common/flash.c')
-rw-r--r--board/Marvell/common/flash.c1072
1 files changed, 1072 insertions, 0 deletions
diff --git a/board/Marvell/common/flash.c b/board/Marvell/common/flash.c
new file mode 100644
index 0000000..c2c5b76
--- /dev/null
+++ b/board/Marvell/common/flash.c
@@ -0,0 +1,1072 @@
+/*
+ * (C) Copyright 2001
+ * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * 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
+ */
+
+/*
+ * flash.c - flash support for the 512k, 8bit boot flash
+ and the 8MB 32bit extra flash on the DB64360
+ * most of this file was based on the existing U-Boot
+ * flash drivers.
+ *
+ * written or collected and sometimes rewritten by
+ * Ingo Assmus <ingo.assmus@keymile.com>
+ *
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+#include "../include/mv_gen_reg.h"
+#include "../include/memory.h"
+#include "intel_flash.h"
+
+#define FLASH_ROM 0xFFFD /* unknown flash type */
+#define FLASH_RAM 0xFFFE /* unknown flash type */
+#define FLASH_MAN_UNKNOWN 0xFFFF0000
+
+/* #define DEBUG */
+
+/* Intel flash commands */
+int flash_erase_intel (flash_info_t * info, int s_first, int s_last);
+int write_word_intel (bank_addr_t addr, bank_word_t value);
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (int portwidth, 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);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+ unsigned int i;
+ unsigned long size_b0 = 0, size_b1 = 0;
+ unsigned long base, flash_size;
+
+ /* Init: no FLASHes known */
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /* the boot flash */
+ base = CFG_FLASH_BASE;
+ size_b0 =
+ flash_get_size (CFG_BOOT_FLASH_WIDTH, (vu_long *) base,
+ &flash_info[0]);
+
+ printf ("[%ldkB@%lx] ", size_b0 / 1024, base);
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b0, size_b0 << 20);
+ }
+
+ base = memoryGetDeviceBaseAddress (CFG_EXTRA_FLASH_DEVICE);
+/* base = memoryGetDeviceBaseAddress(DEV_CS3_BASE_ADDR);*/
+ for (i = 1; i < CFG_MAX_FLASH_BANKS; i++) {
+ unsigned long size =
+ flash_get_size (CFG_EXTRA_FLASH_WIDTH,
+ (vu_long *) base, &flash_info[i]);
+
+ printf ("[%ldMB@%lx] ", size >> 20, base);
+
+ if (flash_info[i].flash_id == FLASH_UNKNOWN) {
+ if (i == 1) {
+ printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b1, size_b1 << 20);
+ }
+ break;
+ }
+ size_b1 += size;
+ base += size;
+ }
+
+ flash_size = size_b0 + size_b1;
+ return flash_size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t * info)
+{
+ int i;
+ int sector_size;
+
+ if (!info->sector_count)
+ return;
+
+ /* set up sector start address table */
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM040:
+ case FLASH_28F128J3A:
+ case FLASH_28F640J3A:
+ case FLASH_RAM:
+ /* this chip has uniformly spaced sectors */
+ sector_size = info->size / info->sector_count;
+ for (i = 0; i < info->sector_count; i++)
+ info->start[i] = base + (i * sector_size);
+ break;
+ default:
+ if (info->flash_id & FLASH_BTYPE) {
+ /* set sector offsets for bottom boot block type */
+ info->start[0] = base + 0x00000000;
+ info->start[1] = base + 0x00008000;
+ info->start[2] = base + 0x0000C000;
+ info->start[3] = base + 0x00010000;
+ for (i = 4; i < info->sector_count; i++) {
+ info->start[i] =
+ base + (i * 0x00020000) - 0x00060000;
+ }
+ } else {
+ /* set sector offsets for top boot block type */
+ i = info->sector_count - 1;
+ info->start[i--] = base + info->size - 0x00008000;
+ info->start[i--] = base + info->size - 0x0000C000;
+ info->start[i--] = base + info->size - 0x00010000;
+ for (; i >= 0; i--) {
+ info->start[i] = base + i * 0x00020000;
+ }
+ }
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_STM:
+ printf ("STM ");
+ break;
+ case FLASH_MAN_AMD:
+ printf ("AMD ");
+ break;
+ case FLASH_MAN_FUJ:
+ printf ("FUJITSU ");
+ break;
+ case FLASH_MAN_INTEL:
+ printf ("INTEL ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_AM040:
+ printf ("AM29LV040B (4 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM400B:
+ printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM400T:
+ printf ("AM29LV400T (4 Mbit, top boot sector)\n");
+ break;
+ case FLASH_AM800B:
+ printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
+ break;
+ case FLASH_AM800T:
+ printf ("AM29LV800T (8 Mbit, top boot sector)\n");
+ break;
+ 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_28F640J3A:
+ printf ("28F640J3A (64 Mbit)\n");
+ break;
+ case FLASH_28F128J3A:
+ printf ("28F128J3A (128 Mbit)\n");
+ break;
+ case FLASH_ROM:
+ printf ("ROM\n");
+ break;
+ case FLASH_RAM:
+ printf ("RAM\n");
+ break;
+ default:
+ printf ("Unknown Chip Type\n");
+ break;
+ }
+
+ if ((info->size >> 20) > 0) {
+ printf (" Size: %ld MB in %d Sectors\n",
+ info->size >> 20, info->sector_count);
+ } else {
+ printf (" Size: %ld kB in %d Sectors\n",
+ info->size >> 10, 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 inline void flash_cmd (int width, volatile unsigned char *addr,
+ int offset, unsigned char cmd)
+{
+ /* supports 1x8, 1x16, and 2x16 */
+ /* 2x8 and 4x8 are not supported */
+ if (width == 4) {
+ /* assuming chips are in 16 bit mode */
+ /* 2x16 */
+ unsigned long cmd32 = (cmd << 16) | cmd;
+
+ *(volatile unsigned long *) (addr + offset * 2) = cmd32;
+ } else {
+ /* 1x16 or 1x8 */
+ *(volatile unsigned char *) (addr + offset) = cmd;
+ }
+}
+
+static ulong
+flash_get_size (int portwidth, vu_long * addr, flash_info_t * info)
+{
+ short i;
+ volatile unsigned char *caddr = (unsigned char *) addr;
+ volatile unsigned short *saddr = (unsigned short *) addr;
+ volatile unsigned long *laddr = (unsigned long *) addr;
+ char old[2], save;
+ ulong id = 0, manu = 0, base = (ulong) addr;
+
+#ifdef DEBUG
+ printf ("%s: enter\n", __FUNCTION__);
+#endif
+ info->portwidth = portwidth;
+
+ save = *caddr;
+
+ flash_cmd (portwidth, caddr, 0, 0xf0);
+ flash_cmd (portwidth, caddr, 0, 0xf0);
+
+ udelay (10);
+
+ old[0] = caddr[0];
+ old[1] = caddr[1];
+
+
+ if (old[0] != 0xf0) {
+ flash_cmd (portwidth, caddr, 0, 0xf0);
+ flash_cmd (portwidth, caddr, 0, 0xf0);
+
+ udelay (10);
+
+ if (*caddr == 0xf0) {
+ /* this area is ROM */
+ *caddr = save;
+ info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
+ info->sector_count = 8;
+ info->size = 0x80000;
+ flash_get_offsets (base, info);
+ return info->size;
+ }
+ } else {
+ *caddr = 0;
+
+ udelay (10);
+
+ if (*caddr == 0) {
+ /* this area is RAM */
+ *caddr = save;
+ info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN;
+ info->sector_count = 8;
+ info->size = 0x80000;
+ flash_get_offsets (base, info);
+ return info->size;
+ }
+ flash_cmd (portwidth, caddr, 0, 0xf0);
+
+ udelay (10);
+ }
+
+ /* Write auto select command: read Manufacturer ID */
+ flash_cmd (portwidth, caddr, 0x555, 0xAA);
+ flash_cmd (portwidth, caddr, 0x2AA, 0x55);
+ flash_cmd (portwidth, caddr, 0x555, 0x90);
+
+ udelay (10);
+
+ if ((caddr[0] == old[0]) && (caddr[1] == old[1])) {
+
+ /* this area is ROM */
+ info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
+ info->sector_count = 8;
+ info->size = 0x80000;
+ flash_get_offsets (base, info);
+ return info->size;
+#ifdef DEBUG
+ } else {
+ printf ("%px%d: %02x:%02x -> %02x:%02x\n",
+ caddr, portwidth, old[0], old[1], caddr[0], caddr[1]);
+#endif
+ }
+
+ switch (portwidth) {
+ case 1:
+ manu = caddr[0];
+ manu |= manu << 16;
+ id = caddr[1];
+ break;
+ case 2:
+ manu = saddr[0];
+ manu |= manu << 16;
+ id = saddr[1];
+ id |= id << 16;
+ break;
+ case 4:
+ manu = laddr[0];
+ id = laddr[1];
+ break;
+ }
+
+#ifdef DEBUG
+ flash_cmd (portwidth, caddr, 0, 0xf0);
+
+ printf ("\n%08lx:%08lx:%08lx\n", base, manu, id);
+ printf ("%08lx %08lx %08lx %08lx\n",
+ laddr[0], laddr[1], laddr[2], laddr[3]);
+#endif
+
+ switch (manu) {
+ case STM_MANUFACT:
+ info->flash_id = FLASH_MAN_STM;
+ break;
+ case AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+ case FUJ_MANUFACT:
+ info->flash_id = FLASH_MAN_FUJ;
+ break;
+ case INTEL_MANUFACT:
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+ default:
+ flash_cmd (portwidth, caddr, 0, 0xf0);
+
+ printf ("Unknown Mfr [%08lx]:%08lx\n", manu, id);
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (0); /* no or unknown flash */
+ }
+
+ switch (id) {
+ case AMD_ID_LV400T:
+ info->flash_id += FLASH_AM400T;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ info->chipwidth = 1;
+ break; /* => 1 MB */
+
+ case AMD_ID_LV400B:
+ info->flash_id += FLASH_AM400B;
+ info->sector_count = 11;
+ info->size = 0x00100000;
+ info->chipwidth = 1;
+ break; /* => 1 MB */
+
+ case AMD_ID_LV800T:
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ info->chipwidth = 1;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV800B:
+ info->flash_id += FLASH_AM800B;
+ info->sector_count = 19;
+ info->size = 0x00200000;
+ info->chipwidth = 1;
+ break; /* => 2 MB */
+
+ case AMD_ID_LV160T:
+ info->flash_id += FLASH_AM160T;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ info->chipwidth = 1;
+ break; /* => 4 MB */
+
+ case AMD_ID_LV160B:
+ info->flash_id += FLASH_AM160B;
+ info->sector_count = 35;
+ info->size = 0x00400000;
+ info->chipwidth = 1;
+ break; /* => 4 MB */
+#if 0 /* enable when device IDs are available */
+ case AMD_ID_LV320T:
+ info->flash_id += FLASH_AM320T;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+
+ case AMD_ID_LV320B:
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 67;
+ info->size = 0x00800000;
+ break; /* => 8 MB */
+#endif
+ case AMD_ID_LV040B:
+ info->flash_id += FLASH_AM040;
+ info->sector_count = 8;
+ info->size = 0x80000;
+ info->chipwidth = 1;
+ break; /* => 512 kB */
+
+ case INTEL_ID_28F640J3A:
+ info->flash_id += FLASH_28F640J3A;
+ info->sector_count = 64;
+ info->size = 128 * 1024 * 64; /* 128kbytes x 64 blocks */
+ info->chipwidth = 2;
+ if (portwidth == 4)
+ info->size *= 2; /* 2x16 */
+ break;
+
+ case INTEL_ID_28F128J3A:
+ info->flash_id += FLASH_28F128J3A;
+ info->sector_count = 128;
+ info->size = 128 * 1024 * 128; /* 128kbytes x 128 blocks */
+ info->chipwidth = 2;
+ if (portwidth == 4)
+ info->size *= 2; /* 2x16 */
+ break;
+
+ default:
+ flash_cmd (portwidth, caddr, 0, 0xf0);
+
+ printf ("Unknown id %lx:[%lx]\n", manu, id);
+ info->flash_id = FLASH_UNKNOWN;
+ info->chipwidth = 1;
+ 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 */
+ caddr = (volatile unsigned char *) (info->start[i]);
+ saddr = (volatile unsigned short *) (info->start[i]);
+ laddr = (volatile unsigned long *) (info->start[i]);
+ if (portwidth == 1)
+ info->protect[i] = caddr[2] & 1;
+ else if (portwidth == 2)
+ info->protect[i] = saddr[2] & 1;
+ else
+ info->protect[i] = laddr[2] & 1;
+ }
+
+ /*
+ * Prevent writes to uninitialized FLASH.
+ */
+ if (info->flash_id != FLASH_UNKNOWN) {
+ caddr = (volatile unsigned char *) info->start[0];
+
+ flash_cmd (portwidth, caddr, 0, 0xF0); /* reset bank */
+ }
+
+ return (info->size);
+}
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+ volatile unsigned char *addr = (char *) (info->start[0]);
+ int flag, prot, sect, l_sect;
+ ulong start, now, last;
+
+/* modified to support 2x16 Intel flash */
+/* Note that the code will not exit on a flash erasure error or timeout */
+/* but will print and error message and continue processing sectors */
+/* until they are all erased. */
+/* 10-16-2002 P. Marchese */
+ ulong mask;
+ int timeout;
+
+ if (info->portwidth == 4)
+/* {
+ printf ("- Warning: erasing of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
+ return 1;
+ }*/
+ {
+ /* make sure it's Intel flash */
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+ /* yup! it's an Intel flash */
+ /* is it 16-bits wide? */
+ if (info->chipwidth == 2) {
+ /* yup! it's 16-bits wide */
+ /* are there any sectors to process? */
+ if ((s_first < 0) || (s_first > s_last)) {
+ printf ("Error: There are no sectors to erase\n");
+ printf ("Either sector %d is less than zero\n", s_first);
+ printf ("or sector %d is greater than sector %d\n", s_first, s_last);
+ return 1;
+ }
+ /* check for protected sectors */
+ prot = 0;
+ for (sect = s_first; sect <= s_last; ++sect)
+ if (info->protect[sect])
+ prot++;
+ /* if variable "prot" is nonzero, there are protected sectors */
+ if (prot)
+ printf ("- Warning: %d protected sectors will not be erased!\n", prot);
+ /* reset the flash */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RST);
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts ();
+ /* Clear the status register */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_CLR_STAT);
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RST);
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last; sect++) {
+ /* is the sector unprotected? */
+ if (info->protect[sect] == 0) { /* not protected */
+ /* issue the single block erase command, 0x20 */
+ flash_cmd (info->portwidth,
+ (volatile unsigned
+ char *) info->
+ start[sect], 0,
+ CHIP_CMD_ERASE1);
+ /* issue the erase confirm command, 0xD0 */
+ flash_cmd (info->portwidth,
+ (volatile unsigned
+ char *) info->
+ start[sect], 0,
+ CHIP_CMD_ERASE2);
+ l_sect = sect;
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts ();
+ /* poll for erasure completion */
+ /* put flash into read status mode by writing 0x70 to it */
+ flash_cmd (info->portwidth,
+ addr, 0,
+ CHIP_CMD_RD_STAT);
+ /* setup the status register mask */
+ mask = CHIP_STAT_RDY |
+ (CHIP_STAT_RDY << 16);
+ /* init. the timeout counter */
+ start = get_timer (0);
+ /* keep looping while the flash is not ready */
+ /* exit the loop by timing out or the flash */
+ /* becomes ready again */
+ timeout = 0;
+ while ((*
+ (volatile unsigned
+ long *) info->
+ start[sect] & mask) !=
+ mask) {
+ /* has the timeout limit been reached? */
+ if (get_timer (start)
+ >
+ CFG_FLASH_ERASE_TOUT)
+ {
+ /* timeout limit reached */
+ printf ("Time out limit reached erasing sector at address %08lx\n", info->start[sect]);
+ printf ("Continuing with next sector\n");
+ timeout = 1;
+ goto timed_out_error;
+ }
+ /* put flash into read status mode by writing 0x70 to it */
+ flash_cmd (info->
+ portwidth,
+ addr, 0,
+ CHIP_CMD_RD_STAT);
+ }
+ /* did we timeout? */
+ timed_out_error:if (timeout == 0)
+ {
+ /* didn't timeout, so check the status register */
+ /* create the status mask to check for errors */
+ mask = CHIP_STAT_ECLBS;
+ mask = mask | (mask <<
+ 16);
+ /* put flash into read status mode by writing 0x70 to it */
+ flash_cmd (info->
+ portwidth,
+ addr, 0,
+ CHIP_CMD_RD_STAT);
+ /* are there any errors? */
+ if ((*
+ (volatile
+ unsigned long *)
+ info->
+ start[sect] &
+ mask) != 0) {
+ /* We got an erasure error */
+ printf ("Flash erasure error at address 0x%08lx\n", info->start[sect]);
+ printf ("Continuing with next sector\n");
+ /* reset the flash */
+ flash_cmd
+ (info->
+ portwidth,
+ addr,
+ 0,
+ CHIP_CMD_RST);
+ }
+ }
+ /* erasure completed without errors */
+ /* reset the flash */
+ flash_cmd (info->portwidth,
+ addr, 0,
+ CHIP_CMD_RST);
+ } /* end if not protected */
+ } /* end for loop */
+ printf ("Flash erasure done\n");
+ return 0;
+ } else {
+ /* The Intel flash is not 16-bit wide */
+ /* print and error message and return */
+ /* NOTE: you can add routines here to handle other size flash */
+ printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
+ printf ("The erasure code only handles Intel 16-bit wide flash memory\n");
+ return 1;
+ }
+ } else {
+ /* Not Intel flash so return an error as a write timeout */
+ /* NOTE: if it's another type flash, stick its routine here */
+ printf ("Error: The flash device is not Intel type\n");
+ printf ("The erasure code only supports Intel flash in a 32-bit port width\n");
+ return 1;
+ }
+ }
+
+ /* end 32-bit wide flash code */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
+ return 1; /* Rom can not be erased */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { /* RAM just copy 0s to RAM */
+ for (sect = s_first; sect <= s_last; sect++) {
+ int sector_size = info->size / info->sector_count;
+
+ addr = (char *) (info->start[sect]);
+ memset ((void *) addr, 0, sector_size);
+ }
+ return 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_VENDMASK) == FLASH_MAN_INTEL) { /* Intel works spezial */
+ return flash_erase_intel (info,
+ (unsigned short) s_first,
+ (unsigned short) s_last);
+ }
+#if 0
+ if ((info->flash_id == FLASH_UNKNOWN) || /* Flash is unknown to PPCBoot */
+ (info->flash_id > FLASH_AMD_COMP)) {
+ printf ("Can't erase unknown flash type %08lx - aborted\n",
+ info->flash_id);
+ return 1;
+ }
+#endif
+
+ 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 ();
+
+ flash_cmd (info->portwidth, addr, 0x555, 0xAA); /* start erase routine */
+ flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
+ flash_cmd (info->portwidth, addr, 0x555, 0x80);
+ flash_cmd (info->portwidth, addr, 0x555, 0xAA);
+ flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (char *) (info->start[sect]);
+ flash_cmd (info->portwidth, addr, 0, 0x30);
+ 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 unsigned char *) (info->start[l_sect]);
+ /* broken for 2x16: TODO */
+ while ((addr[0] & 0x80) != 0x80) {
+ 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 = (volatile unsigned char *) info->start[0];
+ flash_cmd (info->portwidth, addr, 0, 0xf0);
+ flash_cmd (info->portwidth, addr, 0, 0xf0);
+
+ printf (" done\n");
+ return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+/* broken for 2x16: TODO */
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int i, l, rc;
+
+/* Commented out since the below code should work for 32-bit(2x 16 flash) */
+/* 10-16-2002 P. Marchese */
+/* if(info->portwidth==4) return 1; */
+/* if(info->portwidth==4) {
+ printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
+ return 1;
+ }*/
+
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
+ return 0;
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
+ memcpy ((void *) addr, src, cnt);
+ return 0;
+ }
+
+ 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
+ */
+/* broken for 2x16: TODO */
+static int write_word (flash_info_t * info, ulong dest, ulong data)
+{
+ volatile unsigned char *addr = (char *) (info->start[0]);
+ ulong start;
+ int flag, i;
+ ulong mask;
+
+/* modified so that it handles 32-bit(2x16 Intel flash programming */
+/* 10-16-2002 P. Marchese */
+
+ if (info->portwidth == 4)
+/* {
+ printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
+ return 1;
+ }*/
+ {
+ /* make sure it's Intel flash */
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+ /* yup! it's an Intel flash */
+ /* is it 16-bits wide? */
+ if (info->chipwidth == 2) {
+ /* yup! it's 16-bits wide */
+ /* so we know how to program it */
+ /* reset the flash */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RST);
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts ();
+ /* Clear the status register */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_CLR_STAT);
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RST);
+ /* 1st cycle of word/byte program */
+ /* write 0x40 to the location to program */
+ flash_cmd (info->portwidth, (char *) dest, 0,
+ CHIP_CMD_PROG);
+ /* 2nd cycle of word/byte program */
+ /* write the data to the destination address */
+ *(ulong *) dest = data;
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts ();
+ /* setup the status register mask */
+ mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16);
+ /* put flash into read status mode by writing 0x70 to it */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RD_STAT);
+ /* init. the timeout counter */
+ start = get_timer (0);
+ /* keep looping while the flash is not ready */
+ /* exit the loop by timing out or the flash */
+ /* becomes ready again */
+/* 11-13-2002 Paul Marchese */
+/* modified while loop conditional statement */
+/* because we were always timing out. */
+/* there is a type mismatch, "addr[0]" */
+/* returns a byte but "mask" is a 32-bit value */
+ while ((*(volatile unsigned long *) info->
+ start[0] & mask) != mask)
+/* original code */
+/* while (addr[0] & mask) != mask) */
+ {
+ /* has the timeout limit been reached? */
+ if (get_timer (start) >
+ CFG_FLASH_WRITE_TOUT) {
+ /* timeout limit reached */
+ printf ("Time out limit reached programming address %08lx with data %08lx\n", dest, data);
+ /* reset the flash */
+ flash_cmd (info->portwidth,
+ addr, 0,
+ CHIP_CMD_RST);
+ return (1);
+ }
+ /* put flash into read status mode by writing 0x70 to it */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RD_STAT);
+ }
+ /* flash is ready, so check the status */
+ /* create the status mask to check for errors */
+ mask = CHIP_STAT_DPS | CHIP_STAT_VPPS |
+ CHIP_STAT_PSLBS;
+ mask = mask | (mask << 16);
+ /* put flash into read status mode by writing 0x70 to it */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RD_STAT);
+ /* are there any errors? */
+ if ((addr[0] & mask) != 0) {
+ /* We got a one of the following errors: */
+ /* Voltage range, Device protect, or programming */
+ /* return the error as a device timeout */
+ /* put flash into read status mode by writing 0x70 to it */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RD_STAT);
+ printf ("Flash programming error at address 0x%08lx\n", dest);
+ printf ("Flash status register contains 0x%08lx\n", (unsigned long) addr[0]);
+ /* reset the flash */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RST);
+ return 1;
+ }
+ /* write completed without errors */
+ /* reset the flash */
+ flash_cmd (info->portwidth, addr, 0,
+ CHIP_CMD_RST);
+ return 0;
+ } else {
+ /* it's not 16-bits wide, so return an error as a write timeout */
+ /* NOTE: you can add routines here to handle other size flash */
+ printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
+ printf ("The write code only handles Intel 16-bit wide flash memory\n");
+ return 1;
+ }
+ } else {
+ /* not Intel flash so return an error as a write timeout */
+ /* NOTE: if it's another type flash, stick its routine here */
+ printf ("Error: The flash device is not Intel type\n");
+ printf ("The code only supports Intel flash in a 32-bit port width\n");
+ return 1;
+ }
+ }
+
+ /* end of 32-bit flash code */
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
+ return 1;
+ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
+ *(unsigned long *) dest = data;
+ return 0;
+ }
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+ unsigned short low = data & 0xffff;
+ unsigned short hi = (data >> 16) & 0xffff;
+ int ret = write_word_intel ((bank_addr_t) dest, hi);
+
+ if (!ret)
+ ret = write_word_intel ((bank_addr_t) (dest + 2),
+ low);
+
+ return ret;
+ }
+
+ /* 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 ();
+
+ /* first, perform an unlock bypass command to speed up flash writes */
+ addr[0x555] = 0xAA;
+ addr[0x2AA] = 0x55;
+ addr[0x555] = 0x20;
+
+ /* write each byte out */
+ for (i = 0; i < 4; i++) {
+ char *data_ch = (char *) &data;
+
+ addr[0] = 0xA0;
+ *(((char *) dest) + i) = data_ch[i];
+ udelay (10); /* XXX */
+ }
+
+ /* we're done, now do an unlock bypass reset */
+ addr[0] = 0x90;
+ addr[0] = 0x00;
+
+ /* 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 2024-11-20 11:20:45 +0000