diff options
Diffstat (limited to 'arch/arm/cpu/arm926ejs/at91/eflash.c')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/at91/eflash.c | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/arch/arm/cpu/arm926ejs/at91/eflash.c b/arch/arm/cpu/arm926ejs/at91/eflash.c deleted file mode 100644 index 3f39264..0000000 --- a/arch/arm/cpu/arm926ejs/at91/eflash.c +++ /dev/null @@ -1,254 +0,0 @@ -/* - * (C) Copyright 2010 - * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * this driver supports the enhanced embedded flash in the Atmel - * AT91SAM9XE devices with the following geometry: - * - * AT91SAM9XE128: 1 plane of 8 regions of 32 pages (total 256 pages) - * AT91SAM9XE256: 1 plane of 16 regions of 32 pages (total 512 pages) - * AT91SAM9XE512: 1 plane of 32 regions of 32 pages (total 1024 pages) - * (the exact geometry is read from the flash at runtime, so any - * future devices should already be covered) - * - * Regions can be write/erase protected. - * Whole (!) pages can be individually written with erase on the fly. - * Writing partial pages will corrupt the rest of the page. - * - * The flash is presented to u-boot with each region being a sector, - * having the following effects: - * Each sector can be hardware protected (protect on/off). - * Each page in a sector can be rewritten anytime. - * Since pages are erased when written, the "erase" does nothing. - * The first "CONFIG_EFLASH_PROTSECTORS" cannot be unprotected - * by u-Boot commands. - * - * Note: Redundant environment will not work in this flash since - * it does use partial page writes. Make sure the environment spans - * whole pages! - */ - -/* - * optional TODOs (nice to have features): - * - * make the driver coexist with other NOR flash drivers - * (use an index into flash_info[], requires work - * in those other drivers, too) - * Make the erase command fill the sectors with 0xff - * (if the flashes grow larger in the future and - * someone puts a jffs2 into them) - * do a read-modify-write for partially programmed pages - */ -#include <common.h> -#include <asm/io.h> -#include <asm/arch/hardware.h> -#include <asm/arch/at91_common.h> -#include <asm/arch/at91_eefc.h> -#include <asm/arch/at91_dbu.h> - -/* checks to detect configuration errors */ -#if CONFIG_SYS_MAX_FLASH_BANKS!=1 -#error eflash: this driver can only handle 1 bank -#endif - -/* global structure */ -flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; -static u32 pagesize; - -unsigned long flash_init (void) -{ - at91_eefc_t *eefc = (at91_eefc_t *) ATMEL_BASE_EEFC; - at91_dbu_t *dbu = (at91_dbu_t *) ATMEL_BASE_DBGU; - u32 id, size, nplanes, planesize, nlocks; - u32 addr, i, tmp=0; - - debug("eflash: init\n"); - - flash_info[0].flash_id = FLASH_UNKNOWN; - - /* check if its an AT91ARM9XE SoC */ - if ((readl(&dbu->cidr) & AT91_DBU_CID_ARCH_MASK) != AT91_DBU_CID_ARCH_9XExx) { - puts("eflash: not an AT91SAM9XE\n"); - return 0; - } - - /* now query the eflash for its structure */ - writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_GETD, &eefc->fcr); - while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0) - ; - id = readl(&eefc->frr); /* word 0 */ - size = readl(&eefc->frr); /* word 1 */ - pagesize = readl(&eefc->frr); /* word 2 */ - nplanes = readl(&eefc->frr); /* word 3 */ - planesize = readl(&eefc->frr); /* word 4 */ - debug("id=%08x size=%u pagesize=%u planes=%u planesize=%u\n", - id, size, pagesize, nplanes, planesize); - for (i=1; i<nplanes; i++) { - tmp = readl(&eefc->frr); /* words 5..4+nplanes-1 */ - }; - nlocks = readl(&eefc->frr); /* word 4+nplanes */ - debug("nlocks=%u\n", nlocks); - /* since we are going to use the lock regions as sectors, check count */ - if (nlocks > CONFIG_SYS_MAX_FLASH_SECT) { - printf("eflash: number of lock regions(%u) "\ - "> CONFIG_SYS_MAX_FLASH_SECT. reducing...\n", - nlocks); - nlocks = CONFIG_SYS_MAX_FLASH_SECT; - } - flash_info[0].size = size; - flash_info[0].sector_count = nlocks; - flash_info[0].flash_id = id; - - addr = ATMEL_BASE_FLASH; - for (i=0; i<nlocks; i++) { - tmp = readl(&eefc->frr); /* words 4+nplanes+1.. */ - flash_info[0].start[i] = addr; - flash_info[0].protect[i] = 0; - addr += tmp; - }; - - /* now read the protection information for all regions */ - writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_GLB, &eefc->fcr); - while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0) - ; - for (i=0; i<flash_info[0].sector_count; i++) { - if (i%32 == 0) - tmp = readl(&eefc->frr); - flash_info[0].protect[i] = (tmp >> (i%32)) & 1; -#if defined(CONFIG_EFLASH_PROTSECTORS) - if (i < CONFIG_EFLASH_PROTSECTORS) - flash_info[0].protect[i] = 1; -#endif - } - - return size; -} - -void flash_print_info (flash_info_t *info) -{ - int i; - - puts("AT91SAM9XE embedded flash\n Size: "); - print_size(info->size, " in "); - printf("%d Sectors\n", 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"); - return; -} - -int flash_real_protect (flash_info_t *info, long sector, int prot) -{ - at91_eefc_t *eefc = (at91_eefc_t *) ATMEL_BASE_EEFC; - u32 pagenum = (info->start[sector]-ATMEL_BASE_FLASH)/pagesize; - u32 i, tmp=0; - - debug("protect sector=%ld prot=%d\n", sector, prot); - -#if defined(CONFIG_EFLASH_PROTSECTORS) - if (sector < CONFIG_EFLASH_PROTSECTORS) { - if (!prot) { - printf("eflash: sector %lu cannot be unprotected\n", - sector); - } - return 1; /* return anyway, caller does not care for result */ - } -#endif - if (prot) { - writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_SLB | - (pagenum << AT91_EEFC_FCR_FARG_SHIFT), &eefc->fcr); - } else { - writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_CLB | - (pagenum << AT91_EEFC_FCR_FARG_SHIFT), &eefc->fcr); - } - while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0) - ; - /* now re-read the protection information for all regions */ - writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_GLB, &eefc->fcr); - while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0) - ; - for (i=0; i<info->sector_count; i++) { - if (i%32 == 0) - tmp = readl(&eefc->frr); - info->protect[i] = (tmp >> (i%32)) & 1; - } - return 0; -} - -static u32 erase_write_page (u32 pagenum) -{ - at91_eefc_t *eefc = (at91_eefc_t *) ATMEL_BASE_EEFC; - - debug("erase+write page=%u\n", pagenum); - - /* give erase and write page command */ - writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_EWP | - (pagenum << AT91_EEFC_FCR_FARG_SHIFT), &eefc->fcr); - while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0) - ; - /* return status */ - return readl(&eefc->fsr) - & (AT91_EEFC_FSR_FCMDE | AT91_EEFC_FSR_FLOCKE); -} - -int flash_erase (flash_info_t *info, int s_first, int s_last) -{ - debug("erase first=%d last=%d\n", s_first, s_last); - puts("this flash does not need and support erasing!\n"); - return 0; -} - -/* - * Copy memory to flash, returns: - * 0 - OK - * 1 - write timeout - */ - -int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) -{ - u32 pagenum; - u32 *src32, *dst32; - u32 i; - - debug("write src=%08lx addr=%08lx cnt=%lx\n", - (ulong)src, addr, cnt); - - /* REQUIRE addr to be on a page start, abort if not */ - if (addr % pagesize) { - printf ("eflash: start %08lx is not on page start\n"\ - " write aborted\n", addr); - return 1; - } - - /* now start copying data */ - pagenum = (addr-ATMEL_BASE_FLASH)/pagesize; - src32 = (u32 *) src; - dst32 = (u32 *) addr; - while (cnt > 0) { - i = pagesize / 4; - /* fill page buffer */ - while (i--) - *dst32++ = *src32++; - /* write page */ - if (erase_write_page(pagenum)) - return 1; - pagenum++; - if (cnt > pagesize) - cnt -= pagesize; - else - cnt = 0; - } - return 0; -} |