/*
- * (C) Copyright 2002
- * Lineo, Inc. <www.lineo.com>
- * Bernhard Kuhn <bkuhn@lineo.com>
+ * (C) Copyright 2003-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
- * (C) Copyright 2002
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Alex Zuepke <azu@sysgo.de>
+ * (C) Copyright 2004
+ * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
+ *
+ * Modified for the CMC PU2 by (C) Copyright 2004 Gary Jennejohn
+ * garyj@denx.de
*
* See file CREDITS for list of people who contributed to this
* project.
#include <common.h>
-ulong myflush(void);
-
-
-/* Flash Organization Structure */
-typedef struct OrgDef
-{
- unsigned int sector_number;
- unsigned int sector_size;
-} OrgDef;
-
-
-/* Flash Organizations */
-OrgDef OrgAT49BV16x4[] =
-{
- { 8, 8*1024 }, /* 8 * 8 kBytes sectors */
- { 2, 32*1024 }, /* 2 * 32 kBytes sectors */
- { 30, 64*1024 }, /* 30 * 64 kBytes sectors */
-};
-
-OrgDef OrgAT49BV16x4A[] =
-{
- { 8, 8*1024 }, /* 8 * 8 kBytes sectors */
- { 31, 64*1024 }, /* 31 * 64 kBytes sectors */
-};
-
-OrgDef OrgAT49BV6416[] =
-{
- { 8, 8*1024 }, /* 8 * 8 kBytes sectors */
- { 127, 64*1024 }, /* 127 * 64 kBytes sectors */
-};
-
-flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
-
-/* AT49BV1614A Codes */
-#define FLASH_CODE1 0xAA
-#define FLASH_CODE2 0x55
-#define ID_IN_CODE 0x90
-#define ID_OUT_CODE 0xF0
-
-
-#define CMD_READ_ARRAY 0x00F0
-#define CMD_UNLOCK1 0x00AA
-#define CMD_UNLOCK2 0x0055
-#define CMD_ERASE_SETUP 0x0080
-#define CMD_ERASE_CONFIRM 0x0030
-#define CMD_PROGRAM 0x00A0
-#define CMD_UNLOCK_BYPASS 0x0020
-#define CMD_SECTOR_UNLOCK 0x0070
+#ifndef CFG_ENV_ADDR
+#define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
+#endif
-#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00005555<<1)))
-#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00002AAA<<1)))
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
-#define BIT_ERASE_DONE 0x0080
-#define BIT_RDY_MASK 0x0080
-#define BIT_PROGRAM_ERROR 0x0020
-#define BIT_TIMEOUT 0x80000000 /* our flag */
+#define FLASH_CYCLE1 0x0555
+#define FLASH_CYCLE2 0x02AA
-#define READY 1
-#define ERR 2
-#define TMO 4
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(vu_short *addr, flash_info_t *info);
+static void flash_reset(flash_info_t *info);
+static int write_word_amd(flash_info_t *info, vu_short *dest, ushort data);
+static flash_info_t *flash_get_info(ulong base);
/*-----------------------------------------------------------------------
+ * flash_init()
+ *
+ * sets up flash_info and returns size of FLASH (bytes)
*/
-void flash_identification (flash_info_t * info)
+unsigned long flash_init (void)
{
- volatile u16 manuf_code, device_code, add_device_code;
+ unsigned long size = 0;
+ ulong flashbase = CFG_FLASH_BASE;
- MEM_FLASH_ADDR1 = FLASH_CODE1;
- MEM_FLASH_ADDR2 = FLASH_CODE2;
- MEM_FLASH_ADDR1 = ID_IN_CODE;
+ /* Init: no FLASHes known */
+ memset(&flash_info[0], 0, sizeof(flash_info_t));
- manuf_code = *(volatile u16 *) CFG_FLASH_BASE;
- device_code = *(volatile u16 *) (CFG_FLASH_BASE + 2);
- add_device_code = *(volatile u16 *) (CFG_FLASH_BASE + (3 << 1));
+ flash_info[0].size = flash_get_size((vu_short *)flashbase, &flash_info[0]);
- MEM_FLASH_ADDR1 = FLASH_CODE1;
- MEM_FLASH_ADDR2 = FLASH_CODE2;
- MEM_FLASH_ADDR1 = ID_OUT_CODE;
+ size = flash_info[0].size;
- /* Vendor type */
- info->flash_id = ATM_MANUFACT & FLASH_VENDMASK;
- printf ("Atmel: ");
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE+monitor_flash_len-1,
+ flash_get_info(CFG_MONITOR_BASE));
+#endif
- if ((device_code & FLASH_TYPEMASK) == (ATM_ID_BV1614 & FLASH_TYPEMASK)) {
-
- if ((add_device_code & FLASH_TYPEMASK) ==
- (ATM_ID_BV1614A & FLASH_TYPEMASK)) {
- info->flash_id |= ATM_ID_BV1614A & FLASH_TYPEMASK;
- printf ("AT49BV1614A (16Mbit)\n");
- } else { /* AT49BV1614 Flash */
- info->flash_id |= ATM_ID_BV1614 & FLASH_TYPEMASK;
- printf ("AT49BV1614 (16Mbit)\n");
- }
+#ifdef CONFIG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR+CFG_ENV_SIZE-1,
+ flash_get_info(CFG_ENV_ADDR));
+#endif
- } else if ((device_code & FLASH_TYPEMASK) == (ATM_ID_BV6416 & FLASH_TYPEMASK)) {
- info->flash_id |= ATM_ID_BV6416 & FLASH_TYPEMASK;
- printf ("AT49BV6416 (64Mbit)\n");
- }
-}
-
-ushort flash_number_sector(OrgDef *pOrgDef, unsigned int nb_blocks)
-{
- int i, nb_sectors = 0;
-
- for (i=0; i<nb_blocks; i++){
- nb_sectors += pOrgDef[i].sector_number;
- }
-
- return nb_sectors;
+ return size ? size : 1;
}
-void flash_unlock_sector(flash_info_t * info, unsigned int sector)
+/*-----------------------------------------------------------------------
+ */
+static void flash_reset(flash_info_t *info)
{
- volatile u16 *addr = (volatile u16 *) (info->start[sector]);
+ vu_short *base = (vu_short *)(info->start[0]);
- MEM_FLASH_ADDR1 = CMD_UNLOCK1;
- *addr = CMD_SECTOR_UNLOCK;
+ /* Put FLASH back in read mode */
+ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
+ *base = 0x00FF; /* Intel Read Mode */
+ else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)
+ *base = 0x00F0; /* AMD Read Mode */
}
+/*-----------------------------------------------------------------------
+ */
-ulong flash_init (void)
+static flash_info_t *flash_get_info(ulong base)
{
- int i, j, k;
- unsigned int flash_nb_blocks, sector;
- unsigned int start_address;
- OrgDef *pOrgDef;
-
- ulong size = 0;
-
- for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
- ulong flashbase = 0;
-
- flash_identification (&flash_info[i]);
-
- if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==
- (ATM_ID_BV1614 & FLASH_TYPEMASK)) {
-
- pOrgDef = OrgAT49BV16x4;
- flash_nb_blocks = sizeof (OrgAT49BV16x4) / sizeof (OrgDef);
- } else if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==
- (ATM_ID_BV1614A & FLASH_TYPEMASK)){ /* AT49BV1614A Flash */
-
- pOrgDef = OrgAT49BV16x4A;
- flash_nb_blocks = sizeof (OrgAT49BV16x4A) / sizeof (OrgDef);
- } else if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==
- (ATM_ID_BV6416 & FLASH_TYPEMASK)){ /* AT49BV6416 Flash */
-
- pOrgDef = OrgAT49BV6416;
- flash_nb_blocks = sizeof (OrgAT49BV6416) / sizeof (OrgDef);
- } else {
- flash_nb_blocks = 0;
- pOrgDef = OrgAT49BV16x4;
- }
-
- flash_info[i].sector_count = flash_number_sector(pOrgDef, flash_nb_blocks);
- memset (flash_info[i].protect, 0, flash_info[i].sector_count);
-
- if (i == 0)
- flashbase = PHYS_FLASH_1;
- else
- panic ("configured too many flash banks!\n");
-
- sector = 0;
- start_address = flashbase;
- flash_info[i].size = 0;
-
- for (j = 0; j < flash_nb_blocks; j++) {
- for (k = 0; k < pOrgDef[j].sector_number; k++) {
- flash_info[i].start[sector++] = start_address;
- start_address += pOrgDef[j].sector_size;
- flash_info[i].size += pOrgDef[j].sector_size;
- }
- }
-
- size += flash_info[i].size;
-
- if ((flash_info[i].flash_id & FLASH_TYPEMASK) ==
- (ATM_ID_BV6416 & FLASH_TYPEMASK)){ /* AT49BV6416 Flash */
+ int i;
+ flash_info_t * info;
- /* Unlock all sectors at reset */
- for (j=0; j<flash_info[i].sector_count; j++){
- flash_unlock_sector(&flash_info[i], j);
- }
- }
+ info = NULL;
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
+ info = & flash_info[i];
+ if (info->size && info->start[0] <= base &&
+ base <= info->start[0] + info->size - 1)
+ break;
}
- /* Protect binary boot image */
- flash_protect (FLAG_PROTECT_SET,
- CFG_FLASH_BASE,
- CFG_FLASH_BASE + CFG_BOOT_SIZE - 1, &flash_info[0]);
-
- /* Protect environment variables */
- flash_protect (FLAG_PROTECT_SET,
- CFG_ENV_ADDR,
- CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
-
- /* Protect U-Boot gzipped image */
- flash_protect (FLAG_PROTECT_SET,
- CFG_U_BOOT_BASE,
- CFG_U_BOOT_BASE + CFG_U_BOOT_SIZE - 1, &flash_info[0]);
-
- return size;
+ return i == CFG_MAX_FLASH_BANKS ? 0 : info;
}
/*-----------------------------------------------------------------------
*/
-void flash_print_info (flash_info_t * 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 (ATM_MANUFACT & FLASH_VENDMASK):
- printf ("Atmel: ");
- break;
- default:
- printf ("Unknown Vendor ");
- break;
+ case FLASH_MAN_AMD: printf ("AMD "); break;
+ case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
+ case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
+ case FLASH_MAN_SST: printf ("SST "); break;
+ case FLASH_MAN_STM: printf ("STM "); break;
+ case FLASH_MAN_INTEL: printf ("INTEL "); break;
+ default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
- case (ATM_ID_BV1614 & FLASH_TYPEMASK):
- printf ("AT49BV1614 (16Mbit)\n");
- break;
- case (ATM_ID_BV1614A & FLASH_TYPEMASK):
- printf ("AT49BV1614A (16Mbit)\n");
- break;
- case (ATM_ID_BV6416 & FLASH_TYPEMASK):
- printf ("AT49BV6416 (64Mbit)\n");
+ case FLASH_S29GL064M:
+ printf ("S29GL064M-R6 (64Mbit, uniform sector size)\n");
break;
default:
printf ("Unknown Chip Type\n");
- goto Done;
break;
}
printf (" Size: %ld MB in %d Sectors\n",
- info->size >> 20, info->sector_count);
+ info->size >> 20,
+ info->sector_count);
printf (" Sector Start Addresses:");
- for (i = 0; i < info->sector_count; i++) {
+
+ for (i=0; i<info->sector_count; ++i) {
if ((i % 5) == 0) {
printf ("\n ");
}
- printf (" %08lX%s", info->start[i],
+ printf (" %08lX%s",
+ info->start[i],
info->protect[i] ? " (RO)" : " ");
}
printf ("\n");
-
-Done: ;
+ return;
}
/*-----------------------------------------------------------------------
*/
-int flash_erase (flash_info_t * info, int s_first, int s_last)
-{
- ulong result;
- int iflag, cflag, prot, sect;
- int rc = ERR_OK;
- int chip1;
-
- /* first look for protection bits */
-
- if (info->flash_id == FLASH_UNKNOWN)
- return ERR_UNKNOWN_FLASH_TYPE;
-
- if ((s_first < 0) || (s_first > s_last)) {
- return ERR_INVAL;
- }
-
- if ((info->flash_id & FLASH_VENDMASK) !=
- (ATM_MANUFACT & FLASH_VENDMASK)) {
- return ERR_UNKNOWN_FLASH_VENDOR;
- }
-
- prot = 0;
- for (sect = s_first; sect <= s_last; ++sect) {
- if (info->protect[sect]) {
- prot++;
- }
- }
- if (prot)
- return ERR_PROTECTED;
-
- /*
- * Disable interrupts which might cause a timeout
- * here. Remember that our exception vectors are
- * at address 0 in the flash, and we don't want a
- * (ticker) exception to happen while the flash
- * chip is in programming mode.
- */
- cflag = icache_status ();
- icache_disable ();
- iflag = disable_interrupts ();
+/*
+ * The following code cannot be run from FLASH!
+ */
- /* Start erase on unprotected sectors */
- for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
- printf ("Erasing sector %2d ... ", sect);
+ulong flash_get_size (vu_short *addr, flash_info_t *info)
+{
+ int i;
+ ushort value;
+ ulong base = (ulong)addr;
- /* arm simple, non interrupt dependent timer */
- reset_timer_masked ();
+ /* Write auto select command sequence */
+ addr[FLASH_CYCLE1] = 0x00AA; /* for AMD, Intel ignores this */
+ addr[FLASH_CYCLE2] = 0x0055; /* for AMD, Intel ignores this */
+ addr[FLASH_CYCLE1] = 0x0090; /* selects Intel or AMD */
- if (info->protect[sect] == 0) { /* not protected */
- volatile u16 *addr = (volatile u16 *) (info->start[sect]);
+ /* read Manufacturer ID */
+ udelay(100);
+ value = addr[0];
+ debug ("Manufacturer ID: %04X\n", value);
- MEM_FLASH_ADDR1 = CMD_UNLOCK1;
- MEM_FLASH_ADDR2 = CMD_UNLOCK2;
- MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
+ switch (value) {
- MEM_FLASH_ADDR1 = CMD_UNLOCK1;
- MEM_FLASH_ADDR2 = CMD_UNLOCK2;
- *addr = CMD_ERASE_CONFIRM;
+ case (AMD_MANUFACT & 0xFFFF):
+ debug ("Manufacturer: AMD (Spansion)\n");
+ info->flash_id = FLASH_MAN_AMD;
+ break;
- /* wait until flash is ready */
- chip1 = 0;
+ case (INTEL_MANUFACT & 0xFFFF):
+ debug ("Manufacturer: Intel (not supported yet)\n");
+ info->flash_id = FLASH_MAN_INTEL;
+ break;
- do {
- result = *addr;
+ default:
+ printf ("Unknown Manufacturer ID: %04X\n", value);
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ goto out;
+ }
- /* check timeout */
- if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
- MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
- chip1 = TMO;
- break;
+ value = addr[1];
+ debug ("Device ID: %04X\n", value);
+
+ switch (addr[1]) {
+
+ case (AMD_ID_MIRROR & 0xFFFF):
+ debug ("Mirror Bit flash: addr[14] = %08X addr[15] = %08X\n",
+ addr[14], addr[15]);
+
+ switch(addr[14]) {
+ case (AMD_ID_GL064M_2 & 0xFFFF):
+ if (addr[15] != (AMD_ID_GL064M_3 & 0xffff)) {
+ printf ("Chip: S29GLxxxM -> unknown\n");
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ } else {
+ debug ("Chip: S29GL064M-R6\n");
+ info->flash_id += FLASH_S29GL064M;
+ info->sector_count = 128;
+ info->size = 0x00800000;
+ for (i = 0; i < info->sector_count; i++) {
+ info->start[i] = base;
+ base += 0x10000;
}
-
- if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
- chip1 = READY;
-
- } while (!chip1);
-
- MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
-
- if (chip1 == ERR) {
- rc = ERR_PROG_ERROR;
- goto outahere;
- }
- if (chip1 == TMO) {
- rc = ERR_TIMOUT;
- goto outahere;
}
-
- printf ("ok.\n");
- } else { /* it was protected */
- printf ("protected!\n");
+ break; /* => 16 MB */
+ default:
+ printf ("Chip: *** unknown ***\n");
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
}
- }
-
- if (ctrlc ())
- printf ("User Interrupt!\n");
-
-outahere:
- /* allow flash to settle - wait 10 ms */
- udelay_masked (10000);
+ break;
- if (iflag)
- enable_interrupts ();
+ default:
+ printf ("Unknown Device ID: %04X\n", value);
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ break;
+ }
- if (cflag)
- icache_enable ();
+out:
+ /* Put FLASH back in read mode */
+ flash_reset(info);
- return rc;
+ return (info->size);
}
/*-----------------------------------------------------------------------
- * Copy memory to flash
*/
-volatile static int write_word (flash_info_t * info, ulong dest,
- ulong data)
+int flash_erase (flash_info_t *info, int s_first, int s_last)
{
- volatile u16 *addr = (volatile u16 *) dest;
- ulong result;
- int rc = ERR_OK;
- int cflag, iflag;
- int chip1;
+ vu_short *addr = (vu_short *)(info->start[0]);
+ int flag, prot, sect, ssect, l_sect;
+ ulong now, last;
- /*
- * Check if Flash is (sufficiently) erased
- */
- result = *addr;
- if ((result & data) != data)
- return ERR_NOT_ERASED;
+ debug ("flash_erase: first: %d last: %d\n", s_first, s_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;
+ }
- /*
- * Disable interrupts which might cause a timeout
- * here. Remember that our exception vectors are
- * at address 0 in the flash, and we don't want a
- * (ticker) exception to happen while the flash
- * chip is in programming mode.
- */
- cflag = icache_status ();
- icache_disable ();
- iflag = disable_interrupts ();
+ 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;
+ }
- MEM_FLASH_ADDR1 = CMD_UNLOCK1;
- MEM_FLASH_ADDR2 = CMD_UNLOCK2;
- MEM_FLASH_ADDR1 = CMD_PROGRAM;
- *addr = data;
+ prot = 0;
+ for (sect=s_first; sect<=s_last; ++sect) {
+ if (info->protect[sect]) {
+ prot++;
+ }
+ }
- /* arm simple, non interrupt dependent timer */
- reset_timer_masked ();
+ if (prot) {
+ printf ("- Warning: %d protected sectors will not be erased!\n",
+ prot);
+ } else {
+ printf ("\n");
+ }
- /* wait until flash is ready */
- chip1 = 0;
- do {
- result = *addr;
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
- /* check timeout */
- if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
- chip1 = ERR | TMO;
- break;
+ /*
+ * Start erase on unprotected sectors.
+ * Since the flash can erase multiple sectors with one command
+ * we take advantage of that by doing the erase in chunks of
+ * 3 sectors.
+ */
+ for (sect = s_first; sect <= s_last; ) {
+ l_sect = -1;
+
+ addr[FLASH_CYCLE1] = 0x00AA;
+ addr[FLASH_CYCLE2] = 0x0055;
+ addr[FLASH_CYCLE1] = 0x0080;
+ addr[FLASH_CYCLE1] = 0x00AA;
+ addr[FLASH_CYCLE2] = 0x0055;
+
+ /* do the erase in chunks of at most 3 sectors */
+ for (ssect = 0; ssect < 3; ssect++) {
+ if ((sect + ssect) > s_last)
+ break;
+ if (info->protect[sect + ssect] == 0) { /* not protected */
+ addr = (vu_short *)(info->start[sect + ssect]);
+ addr[0] = 0x0030;
+ l_sect = sect + ssect;
+ }
}
- if (!chip1 && ((result & 0x80) == (data & 0x80)))
- chip1 = READY;
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
- } while (!chip1);
+ /*
+ * We wait for the last triggered sector
+ */
+ if (l_sect < 0)
+ goto DONE;
- *addr = CMD_READ_ARRAY;
-
- if (chip1 == ERR || *addr != data)
- rc = ERR_PROG_ERROR;
+ reset_timer_masked ();
+ last = 0;
+ addr = (vu_short *)(info->start[l_sect]);
+ while ((addr[0] & 0x0080) != 0x0080) {
+ if ((now = get_timer_masked ()) > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+ }
+ addr = (vu_short *)info->start[0];
+ addr[0] = 0x00F0; /* reset bank */
+ sect += ssect;
+ }
- if (iflag)
- enable_interrupts ();
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
- if (cflag)
- icache_enable ();
+DONE:
+ /* reset to read mode */
+ addr = (vu_short *)info->start[0];
+ addr[0] = 0x00F0; /* reset bank */
- return rc;
+ printf (" done\n");
+ return 0;
}
/*-----------------------------------------------------------------------
- * Copy memory to flash.
+ * 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)
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong wp, data;
int rc;
wp = addr;
while (cnt >= 2) {
- data = *((volatile u16 *) src);
- if ((rc = write_word (info, wp, data)) != 0) {
+ data = *((vu_short *)src);
+ if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
+printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
return (rc);
}
src += 2;
cnt -= 2;
}
+ if (cnt == 0) {
+ return (ERR_OK);
+ }
+
if (cnt == 1) {
- data = (*((volatile u8 *) src)) | (*((volatile u8 *) (wp + 1)) <<
- 8);
- if ((rc = write_word (info, wp, data)) != 0) {
+ data = (*((volatile u8 *) src)) | (*((volatile u8 *) (wp + 1)) << 8);
+ if ((rc = write_word_amd(info, (vu_short *)wp, data)) != 0) {
+printf ("write_buff 1: write_word_amd() rc=%d\n", rc);
return (rc);
}
src += 1;
wp += 1;
cnt -= 1;
- };
+ }
return ERR_OK;
}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash for AMD FLASH
+ * A word is 16 or 32 bits, whichever the bus width of the flash bank
+ * (not an individual chip) is.
+ *
+ * returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word_amd (flash_info_t *info, vu_short *dest, ushort data)
+{
+ int flag;
+ vu_short *base; /* first address in flash bank */
+
+ /* Check if Flash is (sufficiently) erased */
+ if ((*dest & data) != data) {
+ return (2);
+ }
+
+ base = (vu_short *)(info->start[0]);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ base[FLASH_CYCLE1] = 0x00AA; /* unlock */
+ base[FLASH_CYCLE2] = 0x0055; /* unlock */
+ base[FLASH_CYCLE1] = 0x00A0; /* selects program mode */
+
+ *dest = data; /* start programming the data */
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ reset_timer_masked ();
+
+ /* data polling for D7 */
+ while ((*dest & 0x0080) != (data & 0x0080)) {
+ if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
+ *dest = 0x00F0; /* reset bank */
+ return (1);
+ }
+ }
+ return (0);
+}
projects / platform / kernel / u-boot.git / blobdiff