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/*
* (C) Copyright 2009
* STEricsson, <www.stericsson.com>
*
* 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
*/
/* --- includes ----------------------------------------------------------- */
#include "common.h"
#include "mmc.h"
#include "init_mmc.h"
#include "gpio.h"
#include "mmc_utils.h"
#ifdef CONFIG_CMD_FAT
#include <part.h>
#include <fat.h>
#endif
#define MMC_CARD_NUM 1
#define EMMC_CARD_NUM 4
enum {
DEV_EMMC = 0,
DEV_MMC
};
static block_dev_desc_t mmc_dev;
static block_dev_desc_t emmc_dev;
static u32 CSD[4];
block_dev_desc_t * mmc_get_dev(int dev)
{
if (dev == DEV_EMMC)
return (block_dev_desc_t *)(&emmc_dev);
else if (dev == DEV_MMC)
return (block_dev_desc_t *)(&mmc_dev);
printf("mmc_get_dev: unknown dev %d\n", dev);
return 0;
}
static unsigned long emmc_block_read(int dev, unsigned long blknr,
lbaint_t blkcnt, void *dest)
{
unsigned long rc;
rc = mmc_readblocks(EMMC_CARD_NUM, (u32) (512 * blknr), (u32 *)dest,
512, blkcnt);
if (rc != 0) {
printf("mmc_block_read: readblocks failed %ld\n", rc);
rc = 0;
} else {
rc = blkcnt;
}
return rc;
}
unsigned long mmc_block_read(int dev, unsigned long blknr,
lbaint_t blkcnt, void *dest)
{
unsigned long i;
unsigned long src= blknr;
unsigned long rc = 0;
for(i = 0; i < blkcnt; i++)
{
/* card#, read offset, buffer, blksize, transfer mode */
mmc_readblock(MMC_CARD_NUM, (u32) (512 * src),
(u32 *)dest, 512, MMCPOLLING);
rc++;
src++;
dest += 512;
}
return rc;
}
int mmc_hw_init(void)
{
t_mmc_error response;
/* save the GPIO0 AFSELA register*/
gpio_altfuncenable(GPIO_ALT_SD_CARD0, "MMC");
/* Power-on the controller*/
response = mmc_enable ();
if (response != MMC_OK)
{
response = mmc_enable ();
if (response != MMC_OK)
{
printf ("Error in card power on\n");
goto end;
}
}
/* Initialise the cards on the bus, if any*/
response = mmc_initCard ();
if (response != MMC_OK)
{
printf ("Error in card initialization\n");
goto end;
}
response = mmc_readcsd (CSD);
if (response != MMC_OK)
{
printf ("Error while fetching card info\n");
goto end;
}
return 0;
end:
return 1;
}
/*
* mmc_legacy_init - called from commandline mmc init <dev>
*
* Initialise hardware and setup block device structure for fat and ext2
* commands.
*/
int mmc_legacy_init(int dev)
{
if (dev == DEV_EMMC) {
debug("EMMC init\n");
/* XXX: emmc_init() does write the MBR (called pib)! */
emmc_init(EMMC_CARD_NUM);
emmc_dev.if_type = IF_TYPE_MMC;
emmc_dev.part_type = PART_TYPE_DOS;
emmc_dev.dev = dev;
emmc_dev.lun = 0;
emmc_dev.type = 0;
emmc_dev.blksz = 512;
emmc_dev.lba = 0x80000; /* XXX: use real size, here 256 MB */
sprintf((char*)emmc_dev.vendor, "Unknown vendor");
sprintf((char*)emmc_dev.product, "Unknown product");
sprintf((char*)emmc_dev.revision, "N/A");
emmc_dev.removable = 0;
emmc_dev.block_read = emmc_block_read;
return 0;
} else if (dev == DEV_MMC) {
debug("MMC init\n");
return init_mmc();
}
printf("mmc_legacy_init: unsupported device# %d\n", dev);
return -1;
}
/* ========================================================================
Name: init_mmc
Description: init multimedia card interface
======================================================================== */
static int init_mmc(void)
{
t_mmc_error mmc_error;
struct gpio_register * gpio_base_address;
/* Initialize the base address of MMC-SD */
mmc_error = mmc_init (0,CFG_MMC_BASE);
if (MMC_OK != mmc_error)
{
printf("mmc_init():: %d \n", mmc_error);
return 1 ;
}
if (u8500_is_earlydrop()) {
gpio_base_address = (void *) IO_ADDRESS(CFG_GPIO_0_BASE);
gpio_base_address -> gpio_dats |= 0xFFC0000;
gpio_base_address -> gpio_pdis &= ~0xFFC0000;
}
if (mmc_hw_init() != 0) {
printf("mmc_init: hw init failed\n");
return -1;
}
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 = 512;
mmc_dev.lba = 0x20000; /* XXX: use real size, here 64 MB */
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;
mmc_dev.block_read = mmc_block_read;
#ifdef CONFIG_CMD_FAT
if (fat_register_device(&mmc_dev, 1) != 0) {
printf("mmc_init: could not register as FAT device\n");
}
#endif /* CONFIG_CMD_FAT */
return 0;
}
/* ------------------------------- End of file ---------------------------- */
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