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-rw-r--r--board/at91rm9200dk/flash.c397
1 files changed, 397 insertions, 0 deletions
diff --git a/board/at91rm9200dk/flash.c b/board/at91rm9200dk/flash.c
new file mode 100644
index 0000000..6497f11
--- /dev/null
+++ b/board/at91rm9200dk/flash.c
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+/*
+ * (C) Copyright 2002
+ * Lineo, Inc. <www.lineo.com>
+ * Bernhard Kuhn <bkuhn@lineo.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+ulong myflush(void);
+
+
+#define FLASH_BANK_SIZE 0x200000 /* 2 MB */
+#define MAIN_SECT_SIZE 0x10000 /* 64 KB */
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+
+#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 MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00005555<<1)))
+#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00002AAA<<1)))
+
+#define BIT_ERASE_DONE 0x0080
+#define BIT_RDY_MASK 0x0080
+#define BIT_PROGRAM_ERROR 0x0020
+#define BIT_TIMEOUT 0x80000000 /* our flag */
+
+#define READY 1
+#define ERR 2
+#define TMO 4
+
+/*-----------------------------------------------------------------------
+ */
+
+ulong flash_init(void)
+{
+ int i, j;
+ ulong size = 0;
+
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
+ {
+ ulong flashbase = 0;
+ flash_info[i].flash_id =
+ (ATM_MANUFACT & FLASH_VENDMASK) |
+ (ATM_ID_BV1614 & 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;
+ else
+ panic("configured to many flash banks!\n");
+ for (j = 0; j < flash_info[i].sector_count; j++)
+ {
+
+ if (j <= 9)
+ {
+ /* 1st to 8th are 8 KB */
+ if (j <= 7)
+ {
+ flash_info[i].start[j] = flashbase + j*0x2000;
+ }
+
+ /* 9th and 10th are both 32 KB */
+ if ((j == 8) || (j == 9))
+ {
+ flash_info[i].start[j] = flashbase + 0x10000 + (j-8)*0x8000;
+ }
+ }
+ else
+ {
+ flash_info[i].start[j] = flashbase + (j-8)*MAIN_SECT_SIZE;
+ }
+ }
+ size += flash_info[i].size;
+ }
+
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_FLASH_BASE,
+ CFG_ENV_ADDR - 1,
+ &flash_info[0]);
+
+ flash_protect(FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
+ &flash_info[0]);
+
+ return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t *info)
+{
+ int i;
+
+ switch (info->flash_id & FLASH_VENDMASK)
+ {
+ case (ATM_MANUFACT & FLASH_VENDMASK):
+ printf("Atmel: ");
+ break;
+ default:
+ printf("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK)
+ {
+ case (ATM_ID_BV1614 & FLASH_TYPEMASK):
+ printf("AT49BV1614 (16Mbit)\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);
+
+ 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");
+
+Done:
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+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();
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
+ {
+ printf("Erasing sector %2d ... ", sect);
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer_masked();
+
+ if (info->protect[sect] == 0)
+ { /* not protected */
+ volatile u16 *addr = (volatile u16 *)(info->start[sect]);
+
+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+ MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
+
+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+ *addr = CMD_ERASE_CONFIRM;
+
+ /* wait until flash is ready */
+ chip1 = 0;
+
+ do
+ {
+ result = *addr;
+
+ /* check timeout */
+ if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
+ {
+ MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+ chip1 = TMO;
+ break;
+ }
+
+ 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");
+ }
+ }
+
+ if (ctrlc())
+ printf("User Interrupt!\n");
+
+outahere:
+ /* allow flash to settle - wait 10 ms */
+ udelay_masked(10000);
+
+ if (iflag)
+ enable_interrupts();
+
+ if (cflag)
+ icache_enable();
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
+{
+ volatile u16 *addr = (volatile u16 *)dest;
+ ulong result;
+ int rc = ERR_OK;
+ int cflag, iflag;
+ int chip1;
+
+ /*
+ * Check if Flash is (sufficiently) erased
+ */
+ result = *addr;
+ if ((result & data) != data)
+ return ERR_NOT_ERASED;
+
+
+ /*
+ * 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();
+
+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+ MEM_FLASH_ADDR1 = CMD_PROGRAM;
+ *addr = data;
+
+ /* arm simple, non interrupt dependent timer */
+ reset_timer_masked();
+
+ /* wait until flash is ready */
+ chip1 = 0;
+ do
+ {
+ result = *addr;
+
+ /* check timeout */
+ if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
+ {
+ chip1 = ERR | TMO;
+ break;
+ }
+ if (!chip1 && ((result & 0x80) == (data & 0x80)))
+ chip1 = READY;
+
+ } while (!chip1);
+
+ *addr = CMD_READ_ARRAY;
+
+ if (chip1 == ERR || *addr != data)
+ rc = ERR_PROG_ERROR;
+
+ if (iflag)
+ enable_interrupts();
+
+ if (cflag)
+ icache_enable();
+
+ return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong wp, data;
+ int rc;
+
+ if(addr & 1) {
+ printf("unaligned destination not supported\n");
+ return ERR_ALIGN;
+ };
+
+ if((int)src & 1) {
+ printf("unaligned source not supported\n");
+ return ERR_ALIGN;
+ };
+
+ wp = addr;
+
+ while (cnt >= 2) {
+ data = *((volatile u16*)src);
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ src += 2;
+ wp += 2;
+ cnt -= 2;
+ }
+
+ if(cnt == 1) {
+ data = (*((volatile u8*)src)) | (*((volatile u8*)(wp+1)) << 8);
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ src += 1;
+ wp += 1;
+ cnt -= 1;
+ };
+
+ return ERR_OK;
+}
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