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authorwdenk <wdenk>2003-02-28 00:49:47 +0000
committerwdenk <wdenk>2003-02-28 00:49:47 +0000
commit6069ff265362ef6239749b5f598b137f407b821e (patch)
tree991432052f2aa7da45d8c1d51db9f80478d7e75d /board/trab/flash.c
parent2a9e02ead3024f33658f1f4110834d0601dd6b2f (diff)
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* Add support for 16 MB flash configuration of TRAB board
* Patch by Erwin Rol, 27 Feb 2003: Add support for RTEMS * Add image information to README * Fix dual PCMCIA slot support (when running with just one slot populated) * Add VFD type detection to trab board * extend drivers/cs8900.c driver to synchronize ethaddr environment variable with value in the EEPROM * Start adding MIPS support files
Diffstat (limited to 'board/trab/flash.c')
-rw-r--r--board/trab/flash.c133
1 files changed, 102 insertions, 31 deletions
diff --git a/board/trab/flash.c b/board/trab/flash.c
index 2443777..a4f164b 100644
--- a/board/trab/flash.c
+++ b/board/trab/flash.c
@@ -26,12 +26,7 @@
#include <common.h>
#include <environment.h>
-ulong myflush (void);
-
-
-#define FLASH_BANK_SIZE 0x800000 /* 8 MB */
-/* this varies depending on the sector */
-#define MAIN_SECT_SIZE 0x20000 /* 2 x 64 kB */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
@@ -43,6 +38,7 @@ flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#define CMD_ERASE_CONFIRM 0x00300030
#define CMD_PROGRAM 0x00A000A0
#define CMD_UNLOCK_BYPASS 0x00200020
+#define CMD_READ_MANF_ID 0x00900090
#define MEM_FLASH_ADDR1 (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
#define MEM_FLASH_ADDR2 (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))
@@ -64,27 +60,38 @@ ulong flash_init (void)
int i, j;
ulong size = 0;
- for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
ulong flashbase = 0;
+ flash_info_t *info = &flash_info[i];
+
+ /* Init: no FLASHes known */
+ info->flash_id = FLASH_UNKNOWN;
+
+ size += flash_get_size (CFG_FLASH_BASE, info);
- flash_info[i].flash_id =
- (AMD_MANUFACT & FLASH_VENDMASK) |
- (AMD_ID_LV320B & FLASH_TYPEMASK);
- flash_info[i].size = FLASH_BANK_SIZE;
- flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
- memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
if (i == 0)
- flashbase = PHYS_FLASH_1;
+ flashbase = CFG_FLASH_BASE;
else
panic ("configured too many flash banks!\n");
- for (j = 0; j < flash_info[i].sector_count; j++) {
-
- flash_info[i].start[j] = flashbase;
-
- /* the first 8 sectors are 8 kB */
- flashbase += (j < 8) ? 0x4000 : MAIN_SECT_SIZE;
+ for (j = 0; j < info->sector_count; j++) {
+
+ info->protect[j] = 0;
+ info->start[j] = flashbase;
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case (FLASH_AM320B & FLASH_TYPEMASK):
+ /* Boot sector type: 8 x 8 + N x 128 kB */
+ flashbase += (j < 8) ? 0x4000 : 0x20000;
+ break;
+ case (FLASH_AM640U & FLASH_TYPEMASK):
+ /* Uniform sector type: 128 kB */
+ flashbase += 0x20000;
+ break;
+ default:
+ printf ("## Bad flash chip type 0x%04lX\n",
+ info->flash_id & FLASH_TYPEMASK);
+ }
}
- size += flash_info[i].size;
}
/*
@@ -116,7 +123,7 @@ void flash_print_info (flash_info_t * info)
int i;
switch (info->flash_id & FLASH_VENDMASK) {
- case (AMD_MANUFACT & FLASH_VENDMASK):
+ case (FLASH_MAN_AMD & FLASH_VENDMASK):
printf ("AMD: ");
break;
default:
@@ -125,9 +132,12 @@ void flash_print_info (flash_info_t * info)
}
switch (info->flash_id & FLASH_TYPEMASK) {
- case (AMD_ID_LV320B & FLASH_TYPEMASK):
+ case (FLASH_AM320B & FLASH_TYPEMASK):
printf ("2x Am29LV320DB (32Mbit)\n");
break;
+ case (FLASH_AM640U & FLASH_TYPEMASK):
+ printf ("2x Am29LV640D (64Mbit)\n");
+ break;
default:
printf ("Unknown Chip Type\n");
goto Done;
@@ -177,7 +187,7 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
}
if ((info->flash_id & FLASH_VENDMASK) !=
- (AMD_MANUFACT & FLASH_VENDMASK)) {
+ (FLASH_MAN_AMD & FLASH_VENDMASK)) {
return ERR_UNKNOWN_FLASH_VENDOR;
}
@@ -265,13 +275,6 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
rc = ERR_TIMOUT;
goto outahere;
}
-
-#if 0
- printf ("ok.\n");
- } else { /* it was protected */
-
- printf ("protected!\n");
-#endif
}
}
@@ -453,3 +456,71 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
return write_word (info, wp, data);
}
+
+/*-----------------------------------------------------------------------
+ */
+
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+ ulong value;
+
+ /* Write auto select command sequence and read Manufacturer ID */
+ addr[0x0555] = CMD_UNLOCK1;
+ addr[0x02AA] = CMD_UNLOCK2;
+ addr[0x0555] = CMD_READ_MANF_ID;
+
+ value = addr[0];
+
+ debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
+
+ switch (value) {
+ case AMD_MANUFACT:
+ info->flash_id = FLASH_MAN_AMD;
+ break;
+
+ default:
+ info->flash_id = FLASH_UNKNOWN;
+ info->sector_count = 0;
+ info->size = 0;
+ addr[0] = 0x00FF00FF; /* restore read mode */
+ debug ("## flash_init: unknown manufacturer\n");
+ return (0); /* no or unknown flash */
+ }
+
+ value = addr[1]; /* device ID */
+
+ debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
+
+ switch (value) {
+ case AMD_ID_LV320B:
+ info->flash_id += FLASH_AM320B;
+ info->sector_count = 71;
+ info->size = 0x00800000;
+
+ addr[0] = 0x00FF00FF; /* restore read mode */
+ break; /* => 8 MB */
+
+ case AMD_ID_LV640U:
+ info->flash_id += FLASH_AM640U;
+ info->sector_count = 128;
+ info->size = 0x01000000;
+
+ addr[0] = 0x00F000F0; /* restore read mode */
+ break; /* => 16 MB */
+
+ default:
+ debug ("## flash_init: unknown flash chip\n");
+ info->flash_id = FLASH_UNKNOWN;
+ addr[0] = 0x00FF00FF; /* restore read mode */
+ return (0); /* => no or unknown 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);
+}