* 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.
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
#include <common.h>
+/* Intel-compatible flash ID */
+#define INTEL_COMPAT 0x89898989
+#define INTEL_ALT 0xB0B0B0B0
-flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+/* 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
-#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
+/* Intel-compatible flash status bits */
+#define INTEL_FINISHED 0x80808080
+#define INTEL_OK 0x80808080
-/*-----------------------------------------------------------------------
- * Functions
- */
-static ulong flash_get_size (vu_long *addr, flash_info_t *info);
-static int write_word (flash_info_t *info, ulong dest, ulong data);
-static int clear_block_lock_bit(vu_long * addr);
+flash_info_t flash_info[CFG_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)
{
-#ifndef CONFIG_MPC8260ADS
- volatile immap_t *immap = (immap_t *)CFG_IMMR;
- volatile memctl8xx_t *memctl = &immap->im_memctl;
- volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE;
-#endif
- unsigned long size;
- int i;
-
- /* Init: enable write,
- * or we cannot even write flash commands
- */
-#ifndef CONFIG_MPC8260ADS
- bcsr->bd_ctrl |= BD_CTRL_FLWE;
-#endif
-
- for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
- flash_info[i].flash_id = FLASH_UNKNOWN;
-
- /* set the default sector offset */
+ ulong size = 0, sect_start, sect_size = 0, bank_size;
+ ushort sect_count = 0;
+ int i, j, nbanks;
+ vu_long *addr = (vu_long *)CFG_FLASH_BASE;
+ vu_long *bcsr = (vu_long *)CFG_BCSR;
+
+ switch (bcsr[2] & 0xF) {
+ case 0:
+ nbanks = 4;
+ break;
+ case 1:
+ nbanks = 2;
+ break;
+ case 2:
+ nbanks = 1;
+ break;
+ default: /* Unsupported configurations */
+ nbanks = CFG_MAX_FLASH_BANKS;
}
- /* Static FLASH Bank configuration here - FIXME XXX */
-
- size = flash_get_size((vu_long *)FLASH_BASE, &flash_info[0]);
-
- if (flash_info[0].flash_id == FLASH_UNKNOWN) {
- printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
- size, size<<20);
+ if (nbanks > CFG_MAX_FLASH_BANKS)
+ nbanks = CFG_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 = CFG_MAX_FLASH_SECT;
+ sect_size =
+ CFG_FLASH_SIZE / CFG_MAX_FLASH_BANKS / CFG_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;
}
-#ifndef CONFIG_MPC8260ADS
- /* Remap FLASH according to real size */
- memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
- memctl->memc_br1 = (CFG_FLASH_BASE & BR_BA_MSK) |
- (memctl->memc_br1 & ~(BR_BA_MSK));
-#endif
-
- /* Re-do sizing to get full correct info */
- size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
- flash_info[0].size = size;
+ if (size == 0) { /* Unknown flash, fill with hard-coded values */
+ sect_start = CFG_FLASH_BASE;
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ flash_info[i].size = CFG_FLASH_SIZE / CFG_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 = CFG_FLASH_SIZE;
+ }
+ else
+ for (i = nbanks; i < CFG_MAX_FLASH_BANKS; i++) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ flash_info[i].size = 0;
+ flash_info[i].sector_count = 0;
+ }
#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
- CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+ CFG_MONITOR_BASE+monitor_flash_len-1,
&flash_info[0]);
#endif
/*-----------------------------------------------------------------------
*/
-
-
-/*-----------------------------------------------------------------------
- */
-
-/*
- * The following code cannot be run from FLASH!
- */
-
-static ulong flash_get_size (vu_long *addr, flash_info_t *info)
-{
- short i;
- ulong value;
- ulong base = (ulong)addr;
- ulong sector_offset;
-
- /* Write "Intelligent Identifier" command: read Manufacturer ID */
- *addr = 0x90909090;
-
- value = addr[0] & 0x00FF00FF;
- switch (value) {
- case MT_MANUFACT: /* SHARP, MT or => Intel */
- case INTEL_ALT_MANU:
- info->flash_id = FLASH_MAN_INTEL;
- break;
- default:
- printf("unknown manufacturer: %x\n", (unsigned int)value);
- 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 (INTEL_ID_28F016S):
- info->flash_id += FLASH_28F016SV;
- info->sector_count = 32;
- info->size = 0x00400000;
- sector_offset = 0x20000;
- break; /* => 2x2 MB */
-
- case (INTEL_ID_28F160S3):
- info->flash_id += FLASH_28F160S3;
- info->sector_count = 32;
- info->size = 0x00400000;
- sector_offset = 0x20000;
- break; /* => 2x2 MB */
-
- case (INTEL_ID_28F320S3):
- info->flash_id += FLASH_28F320S3;
- info->sector_count = 64;
- info->size = 0x00800000;
- sector_offset = 0x20000;
- break; /* => 2x4 MB */
-
- case SHARP_ID_28F016SCL:
- case SHARP_ID_28F016SCZ:
- info->flash_id = FLASH_MAN_SHARP | FLASH_LH28F016SCT;
- info->sector_count = 32;
- info->size = 0x00800000;
- sector_offset = 0x40000;
- break; /* => 4x2 MB */
-
-
- default:
- info->flash_id = FLASH_UNKNOWN;
- return (0); /* => no or unknown flash */
-
- }
-
- /* set up sector start address table */
- for (i = 0; i < info->sector_count; i++) {
- info->start[i] = base;
- base += sector_offset;
- /* don't know how to check sector protection */
- info->protect[i] = 0;
- }
-
- /*
- * Prevent writes to uninitialized FLASH.
- */
- if (info->flash_id != FLASH_UNKNOWN) {
- addr = (vu_long *)info->start[0];
-
- *addr = 0xFFFFFF; /* reset bank to read array mode */
- }
-
- return (info->size);
-}
-
-
-/*-----------------------------------------------------------------------
- */
-
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
int flag, prot, sect;
printf ("\n");
}
- /* Make Sure Block Lock Bit is not set. */
- if(clear_block_lock_bit((vu_long *)(info->start[s_first]))){
- return 1;
- }
-
-
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
- /* Reset Array */
- *addr = 0xffffffff;
/* Clear Status Register */
- *addr = 0x50505050;
+ *addr = INTEL_CLEAR;
/* Single Block Erase Command */
- *addr = 0x20202020;
+ *addr = INTEL_ERASE;
/* Confirm */
- *addr = 0xD0D0D0D0;
+ *addr = INTEL_CONFIRM;
if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
/* Resume Command, as per errata update */
- *addr = 0xD0D0D0D0;
+ *addr = INTEL_CONFIRM;
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
- /* wait at least 80us - let's wait 1 ms */
- udelay (1000);
- while ((*addr & 0x80808080) != 0x80808080) {
- if(*addr & 0x20202020){
- printf("Error in Block Erase - Lock Bit may be set!\n");
- printf("Status Register = 0x%X\n", (uint)*addr);
- *addr = 0xFFFFFFFF; /* reset bank */
- return 1;
- }
+ while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
- *addr = 0xFFFFFFFF; /* reset bank */
+ *addr = INTEL_RESET; /* reset bank */
return 1;
}
/* show that we're waiting */
}
}
+ 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 = 0xFFFFFFFF;
+ *addr = INTEL_RESET;
}
}
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) > CFG_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
wp = (addr & ~3); /* get lower word aligned address */
+ *(vu_long *)wp = INTEL_RESET; /* Reset to read array mode */
+
/*
* handle unaligned start bytes
*/
data = (data << 8) | (*(uchar *)cp);
}
- return (write_word(info, wp, data));
+ rc = write_word(info, wp, data);
+
+ return rc;
}
/*-----------------------------------------------------------------------
- * Write a word to Flash, returns:
+ * Set/Clear sector's lock bit, returns:
* 0 - OK
- * 1 - write timeout
- * 2 - Flash not erased
+ * 1 - Error (timeout, voltage problems, etc.)
*/
-static int write_word (flash_info_t *info, ulong dest, ulong data)
+int flash_real_protect(flash_info_t *info, long sector, int prot)
{
- vu_long *addr = (vu_long *)dest;
- ulong start, csr;
- int flag;
-
- /* Check if Flash is (sufficiently) erased */
- if ((*addr & data) != data) {
- return (2);
+ 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 */
}
- /* Disable interrupts which might cause a timeout here */
- flag = disable_interrupts();
-
- /* Write Command */
- *addr = 0x10101010;
-
- /* Write Data */
- *addr = data;
-
- /* re-enable interrupts if necessary */
- if (flag)
- enable_interrupts();
- /* data polling for D7 */
- start = get_timer (0);
- flag = 0;
- while (((csr = *addr) & 0x80808080) != 0x80808080) {
- if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
- flag = 1;
+ start = get_timer(0);
+ while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
+ if (get_timer(start) > CFG_FLASH_UNLOCK_TOUT) {
+ printf("Flash lock bit operation timed out\n");
+ rc = 1;
break;
}
}
- if (csr & 0x40404040) {
- printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
- flag = 1;
+
+ if (*addr != INTEL_OK) {
+ printf("Flash lock bit operation failed at %08X, CSR=%08X\n",
+ (uint)addr, (uint)*addr);
+ rc = 1;
}
- /* Clear Status Registers Command */
- *addr = 0x50505050;
- /* Reset to read array mode */
- *addr = 0xFFFFFFFF;
+ if (!rc)
+ info->protect[sector] = prot;
- return (flag);
-}
-
-/*-----------------------------------------------------------------------
- * Clear Block Lock Bit, returns:
- * 0 - OK
- * 1 - Timeout
- */
-
-static int clear_block_lock_bit(vu_long * addr)
-{
- ulong start, now;
+ /*
+ * 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(CFG_FLASH_LOCK_TOUT * 1000);
+ }
- /* Reset Array */
- *addr = 0xffffffff;
- /* Clear Status Register */
- *addr = 0x50505050;
+ if (flag)
+ enable_interrupts();
- *addr = 0x60606060;
- *addr = 0xd0d0d0d0;
+ *addr = INTEL_RESET; /* Reset to read array mode */
- start = get_timer (0);
- while(*addr != 0x80808080){
- if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
- printf ("Timeout on clearing Block Lock Bit\n");
- *addr = 0xFFFFFFFF; /* reset bank */
- return 1;
- }
- }
- return 0;
+ return rc;
}
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