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/*
* 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 <init.h>
#include <common.h>
#include <sizes.h>
#include <environment.h>
#include <asm/io.h>
#include <mach/imx51-regs.h>
#include "gpio.h"
void *imx_gpio_base[] = {
(void *)0x87f84000,
(void *)0x73f88000,
(void *)0x73f8c000,
(void *)0x73f90000,
};
int imx_gpio_count = ARRAY_SIZE(imx_gpio_base) * 32;
#define SI_REV 0x48
static u32 mx51_silicon_revision;
static char *mx51_rev_string = "unknown";
int imx_silicon_revision(void)
{
return mx51_silicon_revision;
}
static int query_silicon_revision(void)
{
void __iomem *rom = MX51_IROM_BASE_ADDR;
u32 rev;
rev = readl(rom + SI_REV);
switch (rev) {
case 0x1:
mx51_silicon_revision = MX51_CHIP_REV_1_0;
mx51_rev_string = "1.0";
break;
case 0x2:
mx51_silicon_revision = MX51_CHIP_REV_1_1;
mx51_rev_string = "1.1";
break;
case 0x10:
mx51_silicon_revision = MX51_CHIP_REV_2_0;
mx51_rev_string = "2.0";
break;
case 0x20:
mx51_silicon_revision = MX51_CHIP_REV_3_0;
mx51_rev_string = "3.0";
break;
default:
mx51_silicon_revision = 0;
}
return 0;
}
core_initcall(query_silicon_revision);
static int imx51_print_silicon_rev(void)
{
printf("detected i.MX51 rev %s\n", mx51_rev_string);
return 0;
}
device_initcall(imx51_print_silicon_rev);
static int imx51_init(void)
{
add_generic_device("imx_iim", 0, NULL, MX51_IIM_BASE_ADDR, SZ_4K,
IORESOURCE_MEM, NULL);
return 0;
}
coredevice_initcall(imx51_init);
/*
* Saves the boot source media into the $barebox_loc enviroment variable
*
* This information is useful for barebox init scripts as we can then easily
* use a kernel image stored on the same media that we launch barebox with
* (for example).
*
* imx25 and imx35 can boot into barebox from several media such as
* nand, nor, mmc/sd cards, serial roms. "mmc" is used to represent several
* sources as its impossible to distinguish between them.
*
* Some sources such as serial roms can themselves have 3 different boot
* possibilities (i2c1, i2c2 etc). It is assumed that any board will
* only be using one of these at any one time.
*
* Note also that I suspect that the boot source pins are only sampled at
* power up.
*/
#define SRC_SBMR 0x4
#define SBMR_BT_MEM_TYPE_SHIFT 7
#define SBMR_BT_MEM_CTL_SHIFT 0
#define SBMR_BMOD_SHIFT 14
static int imx51_boot_save_loc(void)
{
const char *bareboxloc = NULL;
uint32_t reg;
unsigned int ctrl, type;
/* [CTRL][TYPE] */
const char *const locations[4][4] = {
{ /* CTRL = WEIM */
"nor",
NULL,
"onenand",
NULL,
}, { /* CTRL == NAND */
"nand",
"nand",
"nand",
"nand",
}, { /* CTRL == reserved */
NULL,
NULL,
NULL,
NULL,
}, { /* CTRL == expansion */
"mmc",
NULL,
"i2c",
"spi",
}
};
reg = readl(MX51_SRC_BASE_ADDR + SRC_SBMR);
switch ((reg >> SBMR_BMOD_SHIFT) & 0x3) {
case 0:
case 2:
/* internal boot */
ctrl = (reg >> SBMR_BT_MEM_CTL_SHIFT) & 0x3;
type = (reg >> SBMR_BT_MEM_TYPE_SHIFT) & 0x3;
bareboxloc = locations[ctrl][type];
break;
case 1:
/* reserved */
bareboxloc = "unknown";
break;
case 3:
bareboxloc = "serial";
break;
}
if (bareboxloc) {
setenv("barebox_loc", bareboxloc);
export("barebox_loc");
}
return 0;
}
coredevice_initcall(imx51_boot_save_loc);
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