--- /dev/null
+/*
+ * (C) Copyright 2000, 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
+ * Add support the Sharp chips on the mpc8260ads.
+ * I started with board/ip860/flash.c and made changes I found in
+ * the MTD project by David Schleef.
+ *
+ * (C) Copyright 2003 Arabella Software Ltd.
+ * Yuli Barcohen <yuli@arabellasw.com>
+ * Re-written to support multi-bank flash SIMMs.
+ * Added support for real protection and JFFS2.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+
+/* Intel-compatible flash ID */
+#define INTEL_COMPAT 0x89898989
+#define INTEL_ALT 0xB0B0B0B0
+
+/* Intel-compatible flash commands */
+#define INTEL_PROGRAM 0x10101010
+#define INTEL_ERASE 0x20202020
+#define INTEL_CLEAR 0x50505050
+#define INTEL_LOCKBIT 0x60606060
+#define INTEL_PROTECT 0x01010101
+#define INTEL_STATUS 0x70707070
+#define INTEL_READID 0x90909090
+#define INTEL_CONFIRM 0xD0D0D0D0
+#define INTEL_RESET 0xFFFFFFFF
+
+/* Intel-compatible flash status bits */
+#define INTEL_FINISHED 0x80808080
+#define INTEL_OK 0x80808080
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * This board supports 32-bit wide flash SIMMs (4x8-bit configuration.)
+ * Up to 32MB of flash supported (up to 4 banks.)
+ * BCSR is used for flash presence detect (page 4-65 of the User's Manual)
+ *
+ * The following code can not run from flash!
+ */
+unsigned long flash_init (void)
+{
+ ulong size = 0, sect_start, sect_size = 0, bank_size;
+ ushort sect_count = 0;
+ int i, j, nbanks;
+ vu_long *addr = (vu_long *)CONFIG_SYS_FLASH_BASE;
+ vu_long *bcsr = (vu_long *)CONFIG_SYS_BCSR;
+
+ switch (bcsr[2] & 0xF) {
+ case 0:
+ nbanks = 4;
+ break;
+ case 1:
+ nbanks = 2;
+ break;
+ case 2:
+ nbanks = 1;
+ break;
+ default: /* Unsupported configurations */
+ nbanks = CONFIG_SYS_MAX_FLASH_BANKS;
+ }
+
+ if (nbanks > CONFIG_SYS_MAX_FLASH_BANKS)
+ nbanks = CONFIG_SYS_MAX_FLASH_BANKS;
+
+ for (i = 0; i < nbanks; i++) {
+ *addr = INTEL_READID; /* Read Intelligent Identifier */
+ if ((addr[0] == INTEL_COMPAT) || (addr[0] == INTEL_ALT)) {
+ switch (addr[1]) {
+ case SHARP_ID_28F016SCL:
+ case SHARP_ID_28F016SCZ:
+ flash_info[i].flash_id = FLASH_MAN_SHARP | FLASH_LH28F016SCT;
+ sect_count = 32;
+ sect_size = 0x40000;
+ break;
+ default:
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ sect_count = CONFIG_SYS_MAX_FLASH_SECT;
+ sect_size =
+ CONFIG_SYS_FLASH_SIZE / CONFIG_SYS_MAX_FLASH_BANKS / CONFIG_SYS_MAX_FLASH_SECT;
+ }
+ }
+ else
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ if (flash_info[i].flash_id == FLASH_UNKNOWN) {
+ printf("### Unknown flash ID %08lX %08lX at address %08lX ###\n",
+ addr[0], addr[1], (ulong)addr);
+ size = 0;
+ *addr = INTEL_RESET; /* Reset bank to Read Array mode */
+ break;
+ }
+ flash_info[i].sector_count = sect_count;
+ flash_info[i].size = bank_size = sect_size * sect_count;
+ size += bank_size;
+ sect_start = (ulong)addr;
+ for (j = 0; j < sect_count; j++) {
+ addr = (vu_long *)sect_start;
+ flash_info[i].start[j] = sect_start;
+ flash_info[i].protect[j] = (addr[2] == 0x01010101);
+ sect_start += sect_size;
+ }
+ *addr = INTEL_RESET; /* Reset bank to Read Array mode */
+ addr = (vu_long *)sect_start;
+ }
+
+ if (size == 0) { /* Unknown flash, fill with hard-coded values */
+ sect_start = CONFIG_SYS_FLASH_BASE;
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ flash_info[i].size = CONFIG_SYS_FLASH_SIZE / CONFIG_SYS_MAX_FLASH_BANKS;
+ flash_info[i].sector_count = sect_count;
+ for (j = 0; j < sect_count; j++) {
+ flash_info[i].start[j] = sect_start;
+ flash_info[i].protect[j] = 0;
+ sect_start += sect_size;
+ }
+ }
+ size = CONFIG_SYS_FLASH_SIZE;
+ }
+ else
+ for (i = nbanks; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ flash_info[i].size = 0;
+ flash_info[i].sector_count = 0;
+ }
+
+#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CONFIG_SYS_MONITOR_BASE,
+ CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
+ &flash_info[0]);
+#endif
+
+#ifdef CONFIG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CONFIG_ENV_ADDR,
+ CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
+ &flash_info[0]);
+#endif
+ return (size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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;
+ case FLASH_MAN_SHARP: printf ("Sharp "); break;
+ default: printf ("Unknown Vendor "); break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case FLASH_28F016SV: printf ("28F016SV (16 Mbit, 32 x 64k)\n");
+ break;
+ case FLASH_28F160S3: printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
+ break;
+ case FLASH_28F320S3: printf ("28F320S3 (32 Mbit, 64 x 512K)\n");
+ break;
+ case FLASH_LH28F016SCT: printf ("28F016SC (16 Mbit, 32 x 64K)\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");
+}
+
+/*-----------------------------------------------------------------------
+ */
+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)
+ && ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_SHARP) ) {
+ 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");
+ }
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ vu_long *addr = (vu_long *)(info->start[sect]);
+
+ last = start = get_timer (0);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* Clear Status Register */
+ *addr = INTEL_CLEAR;
+ /* Single Block Erase Command */
+ *addr = INTEL_ERASE;
+ /* Confirm */
+ *addr = INTEL_CONFIRM;
+
+ if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
+ /* Resume Command, as per errata update */
+ *addr = INTEL_CONFIRM;
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
+ if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ *addr = INTEL_RESET; /* reset bank */
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+
+ if (*addr != INTEL_OK) {
+ printf("Block erase failed at %08X, CSR=%08X\n",
+ (uint)addr, (uint)*addr);
+ *addr = INTEL_RESET; /* reset bank */
+ return 1;
+ }
+
+ /* reset to read mode */
+ *addr = INTEL_RESET;
+ }
+ }
+
+ printf (" done\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)
+{
+ ulong start;
+ int rc = 0;
+ int flag;
+ vu_long *addr = (vu_long *)dest;
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*addr & data) != data) {
+ return (2);
+ }
+
+ *addr = INTEL_CLEAR; /* Clear status register */
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* Write Command */
+ *addr = INTEL_PROGRAM;
+
+ /* Write Data */
+ *addr = data;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
+ if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
+ printf("Write timed out\n");
+ rc = 1;
+ break;
+ }
+ }
+ if (*addr != INTEL_OK) {
+ printf ("Write failed at %08X, CSR=%08X\n", (uint)addr, (uint)*addr);
+ rc = 1;
+ }
+
+ *addr = INTEL_RESET; /* Reset to read array mode */
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * 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 i, l, rc;
+
+ wp = (addr & ~3); /* get lower word aligned address */
+
+ *(vu_long *)wp = INTEL_RESET; /* Reset to read array mode */
+
+ /*
+ * 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);
+ }
+
+ rc = write_word(info, wp, data);
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Set/Clear sector's lock bit, returns:
+ * 0 - OK
+ * 1 - Error (timeout, voltage problems, etc.)
+ */
+int flash_real_protect(flash_info_t *info, long sector, int prot)
+{
+ ulong start;
+ int i;
+ int rc = 0;
+ vu_long *addr = (vu_long *)(info->start[sector]);
+ int flag = disable_interrupts();
+
+ *addr = INTEL_CLEAR; /* Clear status register */
+ if (prot) { /* Set sector lock bit */
+ *addr = INTEL_LOCKBIT; /* Sector lock bit */
+ *addr = INTEL_PROTECT; /* set */
+ }
+ else { /* Clear sector lock bit */
+ *addr = INTEL_LOCKBIT; /* All sectors lock bits */
+ *addr = INTEL_CONFIRM; /* clear */
+ }
+
+ start = get_timer(0);
+ while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
+ if (get_timer(start) > CONFIG_SYS_FLASH_UNLOCK_TOUT) {
+ printf("Flash lock bit operation timed out\n");
+ rc = 1;
+ break;
+ }
+ }
+
+ if (*addr != INTEL_OK) {
+ printf("Flash lock bit operation failed at %08X, CSR=%08X\n",
+ (uint)addr, (uint)*addr);
+ rc = 1;
+ }
+
+ if (!rc)
+ info->protect[sector] = prot;
+
+ /*
+ * Clear lock bit command clears all sectors lock bits, so
+ * we have to restore lock bits of protected sectors.
+ */
+ if (!prot)
+ for (i = 0; i < info->sector_count; i++)
+ if (info->protect[i]) {
+ addr = (vu_long *)(info->start[i]);
+ *addr = INTEL_LOCKBIT; /* Sector lock bit */
+ *addr = INTEL_PROTECT; /* set */
+ udelay(CONFIG_SYS_FLASH_LOCK_TOUT * 1000);
+ }
+
+ if (flag)
+ enable_interrupts();
+
+ *addr = INTEL_RESET; /* Reset to read array mode */
+
+ return rc;
+}
Code Review / kvmfornfv.git / blobdiff