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diff --git a/board/gen860t/flash.c b/board/gen860t/flash.c
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+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * Keith Outwater, keith_outwater@mvsi.com
+ *
+ * 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
+
+/*
+ * Use buffered writes to flash by default - they are about 32x faster than
+ * single byte writes.
+ */
+#ifndef CFG_GEN860T_FLASH_USE_WRITE_BUFFER
+#define CFG_GEN860T_FLASH_USE_WRITE_BUFFER
+#endif
+
+/*
+ * Max time to wait (in mS) for flash device to allocate a write buffer.
+ */
+#ifndef CFG_FLASH_ALLOC_BUFFER_TOUT
+#define CFG_FLASH_ALLOC_BUFFER_TOUT 100
+#endif
+
+/*
+ * These functions support a single Intel StrataFlash device (28F128J3A)
+ * in byte mode only!. The flash routines are very basic and simple
+ * since there isn't really any remapping necessary.
+ */
+
+/*
+ * Intel SCS (Scalable Command Set) command definitions
+ * (taken from 28F128J3A datasheet)
+ */
+#define SCS_READ_CMD 0xff
+#define SCS_READ_ID_CMD 0x90
+#define SCS_QUERY_CMD 0x98
+#define SCS_READ_STATUS_CMD 0x70
+#define SCS_CLEAR_STATUS_CMD 0x50
+#define SCS_WRITE_BUF_CMD 0xe8
+#define SCS_PROGRAM_CMD 0x40
+#define SCS_BLOCK_ERASE_CMD 0x20
+#define SCS_BLOCK_ERASE_RESUME_CMD 0xd0
+#define SCS_PROGRAM_RESUME_CMD 0xd0
+#define SCS_BLOCK_ERASE_SUSPEND_CMD 0xb0
+#define SCS_SET_BLOCK_LOCK_CMD 0x60
+#define SCS_CLR_BLOCK_LOCK_CMD 0x60
+
+/*
+ * SCS status/extended status register bit definitions
+ */
+#define SCS_SR7 0x80
+#define SCS_XSR7 0x80
+
+/*---------------------------------------------------------------------*/
+#if 0
+#define DEBUG_FLASH
+#endif
+
+#ifdef DEBUG_FLASH
+#define PRINTF(fmt,args...) printf(fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+/*---------------------------------------------------------------------*/
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_char *addr, flash_info_t *info);
+static int write_data8 (flash_info_t *info, ulong dest, uchar data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+/*-----------------------------------------------------------------------
+ * Initialize the flash memory.
+ */
+unsigned long
+flash_init (void)
+{
+ volatile immap_t *immap = (immap_t *)CFG_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+ unsigned long size_b0;
+ int i;
+
+ for (i= 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ /*
+ * The gen860t board only has one FLASH memory device, so the
+ * FLASH Bank configuration is done statically.
+ */
+ PRINTF("\n## Get flash bank 1 size @ 0x%08x\n", FLASH_BASE0_PRELIM);
+ size_b0 = flash_get_size((vu_char *)FLASH_BASE0_PRELIM, &flash_info[0]);
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0: "
+ "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
+ flash_info[0].flash_id,size_b0, size_b0 << 20);
+ }
+
+ PRINTF("## Before remap:\n"
+ " BR0: 0x%08x OR0: 0x%08x\n BR1: 0x%08x OR1: 0x%08x\n",
+ memctl->memc_br0, memctl->memc_or0,
+ memctl->memc_br1, memctl->memc_or1);
+
+ /*
+ * Remap FLASH according to real size
+ */
+ memctl->memc_or0 |= (-size_b0 & 0xFFFF8000);
+ memctl->memc_br0 |= (CFG_FLASH_BASE & BR_BA_MSK);
+
+ PRINTF("## After remap:\n"
+ " 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_char *)CFG_FLASH_BASE, &flash_info[0]);
+ flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+ flash_info[0].size = size_b0;
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /*
+ * Monitor protection is ON by default
+ */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
+ &flash_info[0]);
+#endif
+
+#ifdef CFG_ENV_IS_IN_FLASH
+ /*
+ * Environment protection ON by default
+ */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
+ &flash_info[0]);
+#endif
+
+ PRINTF("## Final Flash bank size: 0x%08lx\n",size_b0);
+ return (size_b0);
+}
+
+
+/*-----------------------------------------------------------------------
+ * Fill in the FLASH offset table
+ */
+static void
+flash_get_offsets (ulong base, flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ return;
+ }
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case FLASH_MAN_INTEL:
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base;
+ base += 1024 * 128;
+ }
+ return;
+
+ default:
+ printf ("Don't know sector offsets for FLASH"
+ " type 0x%lx\n", info->flash_id);
+ return;
+ }
+}
+
+
+/*-----------------------------------------------------------------------
+ * Display FLASH device info
+ */
+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_INTEL:
+ printf ("Intel ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_28F128J3A:
+ printf ("28F128J3A (128Mbit = 128K x 128)\n");
+ break;
+ default:
+ printf ("Unknown Chip Type\n");
+ break;
+ }
+
+ if (info->size >= (1024 * 1024)) {
+ i = 20;
+ } else {
+ i = 10;
+ }
+ printf (" Size: %ld %cB in %d Sectors\n",
+ info->size >> i,
+ (i == 20) ? 'M' : 'k',
+ 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;
+}
+
+
+/*-----------------------------------------------------------------------
+ * Get size and other information for a FLASH device.
+ * NOTE: The following code cannot be run from FLASH!
+ */
+static
+ulong flash_get_size (vu_char *addr, flash_info_t *info)
+{
+#define NO_FLASH 0
+
+ vu_char value[2];
+
+ /*
+ * Try to read the manufacturer ID
+ */
+ addr[0] = SCS_READ_CMD;
+ addr[0] = SCS_READ_ID_CMD;
+ value[0] = addr[0];
+ value[1] = addr[2];
+ addr[0] = SCS_READ_CMD;
+
+ PRINTF("Manuf. ID @ 0x%08lx: 0x%02x\n", (ulong)addr, value[0]);
+ switch (value[0]) {
+ case (INTEL_MANUFACT & 0xff):
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ return (NO_FLASH);
+ }
+
+ /*
+ * Read the device ID
+ */
+ PRINTF("Device ID @ 0x%08lx: 0x%02x\n", (ulong)(&addr[2]), value[1]);
+ switch (value[1]) {
+ case (INTEL_ID_28F128J3A & 0xff):
+ info->flash_id += FLASH_28F128J3A;
+ info->sector_count = 128;
+ info->size = 16 * 1024 * 1024;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ return (NO_FLASH);
+ }
+
+ 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;
+ }
+ return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ * Erase the specified sectors in the specified FLASH device
+ */
+int
+flash_erase(flash_info_t *info, int s_first, int s_last)
+{
+ int flag, prot, 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_VENDMASK) != FLASH_MAN_INTEL) {
+ printf ("Can erase only Intel flash types - 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");
+ }
+
+ start = get_timer (0);
+ last = start;
+
+ /*
+ * Start erase on unprotected sectors
+ */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ vu_char *addr = (uchar *)(info->start[sect]);
+ vu_char status;
+
+ /*
+ * Disable interrupts which might cause a timeout
+ */
+ flag = disable_interrupts();
+
+ *addr = SCS_CLEAR_STATUS_CMD;
+ *addr = SCS_BLOCK_ERASE_CMD;
+ *addr = SCS_BLOCK_ERASE_RESUME_CMD;
+
+ /*
+ * Re-enable interrupts if necessary
+ */
+ if (flag)
+ enable_interrupts();
+
+ /*
+ * Wait at least 80us - let's wait 1 ms
+ */
+ udelay (1000);
+
+ while (((status = *addr) & SCS_SR7) != SCS_SR7) {
+ if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ *addr = SCS_BLOCK_ERASE_SUSPEND_CMD;
+ *addr = SCS_READ_CMD;
+ return 1;
+ }
+
+ /*
+ * Show that we're waiting
+ */
+ if ((now - last) > 1000) { /* 1 second */
+ putc ('.');
+ last = now;
+ }
+ }
+ *addr = SCS_READ_CMD;
+ }
+ }
+ printf (" done\n");
+ return 0;
+}
+
+
+#ifdef CFG_GEN860T_FLASH_USE_WRITE_BUFFER
+/*
+ * Allocate a flash buffer, fill it with data and write it to the flash.
+ * 0 - OK
+ * 1 - Timeout on buffer request
+ *
+ * NOTE: After the last call to this function, WSM status needs to be checked!
+ */
+static int
+write_flash_buffer8(flash_info_t *info_p, vu_char *src_p, vu_char *dest_p,
+ uint count)
+{
+ vu_char *block_addr_p = NULL;
+ vu_char *start_addr_p = NULL;
+ ulong blocksize = info_p->size / (ulong)info_p->sector_count;
+
+ int i;
+ uint time = get_timer(0);
+
+ PRINTF("%s:%d: src: 0x%p dest: 0x%p count: %d\n",
+ __FUNCTION__, __LINE__, src_p, dest_p, count);
+
+ /*
+ * What block are we in? We already know that the source address is
+ * in the flash address range, but we also can't cross a block boundary.
+ * We assume that the block does not cross a boundary (we'll check before
+ * calling this function).
+ */
+ for (i = 0; i < info_p->sector_count; ++i) {
+ if ( ((ulong)dest_p >= info_p->start[i]) &&
+ ((ulong)dest_p < (info_p->start[i] + blocksize)) ) {
+ PRINTF("%s:%d: Dest addr 0x%p is in block %d @ 0x%.8lx\n",
+ __FUNCTION__, __LINE__, dest_p, i, info_p->start[i]);
+ block_addr_p = (vu_char *)info_p->start[i];
+ break;
+ }
+ }
+
+ /*
+ * Request a buffer
+ */
+ *block_addr_p = SCS_WRITE_BUF_CMD;
+ while ((*block_addr_p & SCS_XSR7) != SCS_XSR7) {
+ if (get_timer(time) > CFG_FLASH_ALLOC_BUFFER_TOUT) {
+ PRINTF("%s:%d: Buffer allocation timeout @ 0x%p (waited %d mS)\n",
+ __FUNCTION__, __LINE__, block_addr_p,
+ CFG_FLASH_ALLOC_BUFFER_TOUT);
+ return 1;
+ }
+ *block_addr_p = SCS_WRITE_BUF_CMD;
+ }
+
+ /*
+ * Fill the buffer with data
+ */
+ start_addr_p = dest_p;
+ *block_addr_p = count - 1; /* flash device wants count - 1 */
+ PRINTF("%s:%d: Fill buffer at block addr 0x%p\n",
+ __FUNCTION__, __LINE__, block_addr_p);
+ for (i = 0; i < count; i++) {
+ *start_addr_p++ = *src_p++;
+ }
+
+ /*
+ * Flush buffer to flash
+ */
+ *block_addr_p = SCS_PROGRAM_RESUME_CMD;
+#if 1
+ time = get_timer(0);
+ while ((*block_addr_p & SCS_SR7) != SCS_SR7) {
+ if (get_timer(time) > CFG_FLASH_WRITE_TOUT) {
+ PRINTF("%s:%d: Write timeout @ 0x%p (waited %d mS)\n",
+ __FUNCTION__, __LINE__, block_addr_p, CFG_FLASH_WRITE_TOUT);
+ return 1;
+ }
+ }
+
+#endif
+ return 0;
+}
+#endif
+
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+int
+write_buff(flash_info_t *info_p, uchar *src_p, ulong addr, ulong count)
+{
+ int rc = 0;
+#ifdef CFG_GEN860T_FLASH_USE_WRITE_BUFFER
+#define FLASH_WRITE_BUF_SIZE 0x00000020 /* 32 bytes */
+ int i;
+ uint bufs;
+ ulong buf_count;
+ vu_char *sp;
+ vu_char *dp;
+#else
+ ulong wp;
+#endif
+
+ PRINTF("\n%s:%d: src: 0x%.8lx dest: 0x%.8lx size: %d (0x%.8lx)\n",
+ __FUNCTION__, __LINE__, (ulong)src_p, addr, (uint)count, count);
+
+ if (info_p->flash_id == FLASH_UNKNOWN) {
+ return 4;
+ }
+
+#ifdef CFG_GEN860T_FLASH_USE_WRITE_BUFFER
+ sp = src_p;
+ dp = (uchar *)addr;
+
+ /*
+ * For maximum performance, we want to align the start address to
+ * the beginning of a write buffer boundary (i.e. A4-A0 of the
+ * start address = 0). See how many bytes are required to get to a
+ * write-buffer-aligned address. If that number is non-zero, do
+ * non buffered writes of the non-aligned data. By doing non-buffered
+ * writes, we avoid the problem of crossing a block (sector) boundary
+ * with buffered writes.
+ */
+ buf_count = FLASH_WRITE_BUF_SIZE - (addr & (FLASH_WRITE_BUF_SIZE - 1));
+ if (buf_count == FLASH_WRITE_BUF_SIZE) { /* already on a boundary */
+ buf_count = 0;
+ }
+ if (buf_count > count) { /* not a full buffers worth of data to write */
+ buf_count = count;
+ }
+ count -= buf_count;
+
+ PRINTF("%s:%d: Write buffer alignment count = %ld\n",
+ __FUNCTION__, __LINE__, buf_count);
+ while (buf_count-- >= 1) {
+ if ((rc = write_data8(info_p, (ulong)dp++, *sp++)) != 0) {
+ return (rc);
+ }
+ }
+
+ PRINTF("%s:%d: count = %ld\n", __FUNCTION__, __LINE__, count);
+ if (count == 0) { /* all done */
+ PRINTF("%s:%d: Less than 1 buffer (%d) worth of bytes\n",
+ __FUNCTION__, __LINE__, FLASH_WRITE_BUF_SIZE);
+ return (rc);
+ }
+
+ /*
+ * Now that we are write buffer aligned, write full or partial buffers.
+ * The fact that we are write buffer aligned automatically avoids
+ * crossing a block address during a write buffer operation.
+ */
+ bufs = count / FLASH_WRITE_BUF_SIZE;
+ PRINTF("%s:%d: %d (0x%x) buffers to write\n", __FUNCTION__, __LINE__,
+ bufs, bufs);
+ while (bufs >= 1) {
+ rc = write_flash_buffer8(info_p, sp, dp, FLASH_WRITE_BUF_SIZE);
+ if (rc != 0) {
+ PRINTF("%s:%d: ** Error writing buf %d\n",
+ __FUNCTION__, __LINE__, bufs);
+ return (rc);
+ }
+ bufs--;
+ sp += FLASH_WRITE_BUF_SIZE;
+ dp += FLASH_WRITE_BUF_SIZE;
+ }
+
+ /*
+ * Do the leftovers
+ */
+ i = count % FLASH_WRITE_BUF_SIZE;
+ PRINTF("%s:%d: %d (0x%x) leftover bytes\n", __FUNCTION__, __LINE__, i, i);
+ if (i > 0) {
+ rc = write_flash_buffer8(info_p, sp, dp, i);
+ }
+
+ sp = (vu_char*)info_p->start[0];
+ *sp = SCS_READ_CMD;
+ return (rc);
+
+#else
+ wp = addr;
+ while (count-- >= 1) {
+ if((rc = write_data8(info_p, wp++, *src_p++)) != 0)
+ return (rc);
+ }
+ return 0;
+#endif
+}
+
+
+/*-----------------------------------------------------------------------
+ * Write a byte to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int
+write_data8 (flash_info_t *info, ulong dest, uchar data)
+{
+ vu_char *addr = (vu_char *)dest;
+ vu_char status;
+ ulong start;
+ int flag;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*addr & data) != data) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = SCS_PROGRAM_CMD;
+ *addr = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer (0);
+
+ while (((status = *addr) & SCS_SR7) != SCS_SR7) {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ *addr = SCS_READ_CMD;
+ return (1);
+ }
+ }
+ *addr = SCS_READ_CMD;
+ return (0);
+}
+
+/* vim: set ts=4 sw=4 tw=78: */
generated by cgit v1.1 at 2024-11-23 18:28:01 +0000