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-rw-r--r--board/csb226/flash.c149
1 files changed, 79 insertions, 70 deletions
diff --git a/board/csb226/flash.c b/board/csb226/flash.c
index 0b95648..0b4e2f6 100644
--- a/board/csb226/flash.c
+++ b/board/csb226/flash.c
@@ -6,6 +6,9 @@
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
+ * (C) Copyright 2002
+ * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
@@ -26,6 +29,7 @@
*/
#include <common.h>
+#include <asm/arch/pxa-regs.h>
#define FLASH_BANK_SIZE 0x02000000
#define MAIN_SECT_SIZE 0x40000 /* 2x16 = 256k per sector */
@@ -33,7 +37,10 @@
flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
-/*-----------------------------------------------------------------------
+/**
+ * flash_init: - initialize data structures for flash chips
+ *
+ * @return: size of the flash
*/
ulong flash_init(void)
@@ -41,8 +48,7 @@ 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[i].flash_id =
(INTEL_MANUFACT & FLASH_VENDMASK) |
@@ -51,8 +57,7 @@ ulong flash_init(void)
flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
- switch (i)
- {
+ switch (i) {
case 0:
flashbase = PHYS_FLASH_1;
break;
@@ -60,15 +65,13 @@ ulong flash_init(void)
panic("configured to many flash banks!\n");
break;
}
- for (j = 0; j < flash_info[i].sector_count; j++)
- {
+ for (j = 0; j < flash_info[i].sector_count; j++) {
flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
}
size += flash_info[i].size;
}
- /* Protect monitor and environment sectors
- */
+ /* Protect monitor and environment sectors */
flash_protect(FLAG_PROTECT_SET,
CFG_FLASH_BASE,
CFG_FLASH_BASE + _armboot_end_data - _armboot_start,
@@ -82,16 +85,21 @@ ulong flash_init(void)
return size;
}
-/*-----------------------------------------------------------------------
+
+/**
+ * flash_print_info: - print information about the flash situation
+ *
+ * @param info:
*/
+
void flash_print_info (flash_info_t *info)
{
int i, j;
- for (j=0; j<CFG_MAX_FLASH_BANKS; j++)
- {
- switch (info->flash_id & FLASH_VENDMASK)
- {
+ for (j=0; j<CFG_MAX_FLASH_BANKS; j++) {
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+
case (INTEL_MANUFACT & FLASH_VENDMASK):
printf("Intel: ");
break;
@@ -100,38 +108,35 @@ void flash_print_info (flash_info_t *info)
break;
}
- switch (info->flash_id & FLASH_TYPEMASK)
- {
+ switch (info->flash_id & FLASH_TYPEMASK) {
+
case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
printf("28F128J3 (128Mbit)\n");
break;
default:
printf("Unknown Chip Type\n");
- goto Done;
- break;
+ return;
}
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 ");
- }
+ 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");
info++;
}
-
-Done:
}
-/*-----------------------------------------------------------------------
+
+/**
+ * flash_erase: - erase flash sectors
+ *
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
@@ -146,19 +151,15 @@ int flash_erase (flash_info_t *info, int s_first, int s_last)
return ERR_INVAL;
}
- if ((info->flash_id & FLASH_VENDMASK) !=
- (INTEL_MANUFACT & FLASH_VENDMASK)) {
+ if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))
return ERR_UNKNOWN_FLASH_VENDOR;
- }
prot = 0;
for (sect=s_first; sect<=s_last; ++sect) {
- if (info->protect[sect]) {
- prot++;
+ if (info->protect[sect]) prot++;
}
- }
- if (prot)
- return ERR_PROTECTED;
+
+ if (prot) return ERR_PROTECTED;
/*
* Disable interrupts which might cause a timeout
@@ -178,57 +179,63 @@ int flash_erase (flash_info_t *info, int s_first, int s_last)
reset_timer_masked();
if (info->protect[sect] == 0) { /* not protected */
- /* vushort *addr = (vushort *)(info->start[sect]); */
- ushort *addr = (ushort *)(info->start[sect]);
+ u32 * volatile addr = (u32 * volatile)(info->start[sect]);
+
+ /* erase sector: */
+ /* The strata flashs are aligned side by side on */
+ /* the data bus, so we have to write the commands */
+ /* to both chips here: */
- *addr = 0x20; /* erase setup */
- *addr = 0xD0; /* erase confirm */
+ *addr = 0x00200020; /* erase setup */
+ *addr = 0x00D000D0; /* erase confirm */
- while ((*addr & 0x80) != 0x80) {
+ while ((*addr & 0x00800080) != 0x00800080) {
if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
- *addr = 0xB0; /* suspend erase */
- *addr = 0xFF; /* reset to read mode */
+ *addr = 0x00B000B0; /* suspend erase*/
+ *addr = 0x00FF00FF; /* read mode */
rc = ERR_TIMOUT;
goto outahere;
}
}
- /* clear status register command */
- *addr = 0x50;
- /* reset to read mode */
- *addr = 0xFF;
+ *addr = 0x00500050; /* clear status register cmd. */
+ *addr = 0x00FF00FF; /* resest to read mode */
+
}
+
printf("ok.\n");
}
- if (ctrlc())
- printf("User Interrupt!\n");
+
+ if (ctrlc()) printf("User Interrupt!\n");
outahere:
/* allow flash to settle - wait 10 ms */
udelay_masked(10000);
- if (flag)
- enable_interrupts();
+ if (flag) enable_interrupts();
return rc;
}
-/*-----------------------------------------------------------------------
- * Copy memory to flash
+
+/**
+ * write_word: - copy memory to flash
+ *
+ * @param info:
+ * @param dest:
+ * @param data:
+ * @return:
*/
static int write_word (flash_info_t *info, ulong dest, ushort data)
{
- /* vushort *addr = (vushort *)dest, val; */
ushort *addr = (ushort *)dest, val;
int rc = ERR_OK;
int flag;
- /* Check if Flash is (sufficiently) erased
- */
- if ((*addr & data) != data)
- return ERR_NOT_ERASED;
+ /* Check if Flash is (sufficiently) erased */
+ if ((*addr & data) != data) return ERR_NOT_ERASED;
/*
* Disable interrupts which might cause a timeout
@@ -252,12 +259,10 @@ static int write_word (flash_info_t *info, ulong dest, ushort data)
reset_timer_masked();
/* wait while polling the status register */
- while(((val = *addr) & 0x80) != 0x80)
- {
+ while(((val = *addr) & 0x80) != 0x80) {
if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
rc = ERR_TIMOUT;
- /* suspend program command */
- *addr = 0xB0;
+ *addr = 0xB0; /* suspend program command */
goto outahere;
}
}
@@ -285,17 +290,23 @@ static int write_word (flash_info_t *info, ulong dest, ushort data)
}
outahere:
- /* read array command */
- *addr = 0xFF;
- if (flag)
- enable_interrupts();
+ *addr = 0xFF; /* read array command */
+ if (flag) enable_interrupts();
return rc;
}
-/*-----------------------------------------------------------------------
- * Copy memory to flash.
+
+/**
+ * write_buf: - Copy memory to flash.
+ *
+ * @param info:
+ * @param src: source of copy transaction
+ * @param addr: where to copy to
+ * @param cnt: number of bytes to copy
+ *
+ * @return error code
*/
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
@@ -344,9 +355,7 @@ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
cnt -= 2;
}
- if (cnt == 0) {
- return ERR_OK;
- }
+ if (cnt == 0) return ERR_OK;
/*
* handle unaligned tail bytes
generated by cgit v1.1 at 2024-11-23 08:32:23 +0000