diff options
Diffstat (limited to 'arch/arm/cpu/arm720t/lpc2292/mmc.c')
| -rw-r--r-- | arch/arm/cpu/arm720t/lpc2292/mmc.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm720t/lpc2292/mmc.c b/arch/arm/cpu/arm720t/lpc2292/mmc.c new file mode 100644 index 0000000..beaffe9 --- /dev/null +++ b/arch/arm/cpu/arm720t/lpc2292/mmc.c @@ -0,0 +1,131 @@ +/* + * 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 <config.h> +#include <common.h> +#include <mmc.h> +#include <asm/errno.h> +#include <asm/arch/hardware.h> +#include <part.h> +#include <fat.h> +#include "mmc_hw.h" +#include <asm/arch/spi.h> + +#ifdef CONFIG_MMC + +#undef MMC_DEBUG + +static block_dev_desc_t mmc_dev; + +/* these are filled out by a call to mmc_hw_get_parameters */ +static int hw_size; /* in kbytes */ +static int hw_nr_sects; +static int hw_sect_size; /* in bytes */ + +block_dev_desc_t * mmc_get_dev(int dev) +{ + return (block_dev_desc_t *)(&mmc_dev); +} + +unsigned long mmc_block_read(int dev, + unsigned long start, + lbaint_t blkcnt, + void *buffer) +{ + unsigned long rc = 0; + unsigned char *p = (unsigned char *)buffer; + unsigned long i; + unsigned long addr = start; + +#ifdef MMC_DEBUG + printf("mmc_block_read: start=%lu, blkcnt=%lu\n", start, + (unsigned long)blkcnt); +#endif + + for(i = 0; i < (unsigned long)blkcnt; i++) { +#ifdef MMC_DEBUG + printf("mmc_read_sector: addr=%lu, buffer=%p\n", addr, p); +#endif + (void)mmc_read_sector(addr, p); + rc++; + addr++; + p += hw_sect_size; + } + + return rc; +} + +/*----------------------------------------------------------------------------- + * Read hardware paramterers (sector size, size, number of sectors) + */ +static int mmc_hw_get_parameters(void) +{ + unsigned char csddata[16]; + unsigned int sizemult; + unsigned int size; + + mmc_read_csd(csddata); + hw_sect_size = 1<<(csddata[5] & 0x0f); + size = ((csddata[6]&0x03)<<10)+(csddata[7]<<2)+(csddata[8]&0xc0); + sizemult = ((csddata[10] & 0x80)>>7)+((csddata[9] & 0x03)<<1); + hw_nr_sects = (size+1)*(1<<(sizemult+2)); + hw_size = hw_nr_sects*hw_sect_size/1024; + +#ifdef MMC_DEBUG + printf("mmc_hw_get_parameters: hw_sect_size=%d, hw_nr_sects=%d, " + "hw_size=%d\n", hw_sect_size, hw_nr_sects, hw_size); +#endif + + return 0; +} + +int mmc_legacy_init(int verbose) +{ + int ret = -ENODEV; + + if (verbose) + printf("mmc_legacy_init\n"); + + spi_init(); + /* this meeds to be done twice */ + mmc_hw_init(); + udelay(1000); + mmc_hw_init(); + + mmc_hw_get_parameters(); + + mmc_dev.if_type = IF_TYPE_MMC; + mmc_dev.part_type = PART_TYPE_DOS; + mmc_dev.dev = 0; + mmc_dev.lun = 0; + mmc_dev.type = 0; + mmc_dev.blksz = hw_sect_size; + mmc_dev.lba = hw_nr_sects; + sprintf((char*)mmc_dev.vendor, "Unknown vendor"); + sprintf((char*)mmc_dev.product, "Unknown product"); + sprintf((char*)mmc_dev.revision, "N/A"); + mmc_dev.removable = 0; /* should be true??? */ + mmc_dev.block_read = mmc_block_read; + + fat_register_device(&mmc_dev, 1); + + ret = 0; + + return ret; +} + +#endif /* CONFIG_MMC */ |