u-boot/board/samsung/universal_c210/universal.c
Łukasz Majewski 4d86bf0860 ARM: Exynos4: ADC: Universal_C210: Enable LDO4 power line for ADC measurement
This patch enables LDO4 power line for preparing proper voltages to be
measured by ADC converter.
This measurement is used for determination of target board HW revision.

Test HW:
Universal_C210 (Exynos4210) rev. 0.0

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2012-05-15 08:31:28 +02:00

322 lines
7.3 KiB
C

/*
* Copyright (C) 2010 Samsung Electronics
* Minkyu Kang <mk7.kang@samsung.com>
* Kyungmin Park <kyungmin.park@samsung.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
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/adc.h>
#include <asm/arch/gpio.h>
#include <asm/arch/mmc.h>
#include <pmic.h>
#include <usb/s3c_udc.h>
#include <asm/arch/cpu.h>
#include <max8998_pmic.h>
DECLARE_GLOBAL_DATA_PTR;
struct exynos4_gpio_part1 *gpio1;
struct exynos4_gpio_part2 *gpio2;
unsigned int board_rev;
u32 get_board_rev(void)
{
return board_rev;
}
static int get_hwrev(void)
{
return board_rev & 0xFF;
}
static void check_hw_revision(void);
int board_init(void)
{
gpio1 = (struct exynos4_gpio_part1 *) EXYNOS4_GPIO_PART1_BASE;
gpio2 = (struct exynos4_gpio_part2 *) EXYNOS4_GPIO_PART2_BASE;
gd->bd->bi_arch_number = MACH_TYPE_UNIVERSAL_C210;
gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
#if defined(CONFIG_PMIC)
pmic_init();
#endif
check_hw_revision();
printf("HW Revision:\t0x%x\n", board_rev);
return 0;
}
int dram_init(void)
{
gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE) +
get_ram_size((long *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
return 0;
}
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
}
static unsigned short get_adc_value(int channel)
{
struct s5p_adc *adc = (struct s5p_adc *)samsung_get_base_adc();
unsigned short ret = 0;
unsigned int reg;
unsigned int loop = 0;
writel(channel & 0xF, &adc->adcmux);
writel((1 << 14) | (49 << 6), &adc->adccon);
writel(1000 & 0xffff, &adc->adcdly);
writel(readl(&adc->adccon) | (1 << 16), &adc->adccon); /* 12 bit */
udelay(10);
writel(readl(&adc->adccon) | (1 << 0), &adc->adccon); /* Enable */
udelay(10);
do {
udelay(1);
reg = readl(&adc->adccon);
} while (!(reg & (1 << 15)) && (loop++ < 1000));
ret = readl(&adc->adcdat0) & 0xFFF;
return ret;
}
static int adc_power_control(int on)
{
int ret;
struct pmic *p = get_pmic();
if (pmic_probe(p))
return -1;
ret = pmic_set_output(p,
MAX8998_REG_ONOFF1,
MAX8998_LDO4, !!on);
return ret;
}
static unsigned int get_hw_revision(void)
{
int hwrev, mode0, mode1;
adc_power_control(1);
mode0 = get_adc_value(1); /* HWREV_MODE0 */
mode1 = get_adc_value(2); /* HWREV_MODE1 */
/*
* XXX Always set the default hwrev as the latest board
* ADC = (voltage) / 3.3 * 4096
*/
hwrev = 3;
#define IS_RANGE(x, min, max) ((x) > (min) && (x) < (max))
if (IS_RANGE(mode0, 80, 200) && IS_RANGE(mode1, 80, 200))
hwrev = 0x0; /* 0.01V 0.01V */
if (IS_RANGE(mode0, 750, 1000) && IS_RANGE(mode1, 80, 200))
hwrev = 0x1; /* 610mV 0.01V */
if (IS_RANGE(mode0, 1300, 1700) && IS_RANGE(mode1, 80, 200))
hwrev = 0x2; /* 1.16V 0.01V */
if (IS_RANGE(mode0, 2000, 2400) && IS_RANGE(mode1, 80, 200))
hwrev = 0x3; /* 1.79V 0.01V */
#undef IS_RANGE
debug("mode0: %d, mode1: %d, hwrev 0x%x\n", mode0, mode1, hwrev);
adc_power_control(0);
return hwrev;
}
static void check_hw_revision(void)
{
int hwrev;
hwrev = get_hw_revision();
board_rev |= hwrev;
}
#ifdef CONFIG_DISPLAY_BOARDINFO
int checkboard(void)
{
puts("Board:\tUniversal C210\n");
return 0;
}
#endif
#ifdef CONFIG_GENERIC_MMC
int board_mmc_init(bd_t *bis)
{
int i, err;
switch (get_hwrev()) {
case 0:
/*
* Set the low to enable LDO_EN
* But when you use the test board for eMMC booting
* you should set it HIGH since it removes the inverter
*/
/* MASSMEMORY_EN: XMDMDATA_6: GPE3[6] */
s5p_gpio_direction_output(&gpio1->e3, 6, 0);
break;
default:
/*
* Default reset state is High and there's no inverter
* But set it as HIGH to ensure
*/
/* MASSMEMORY_EN: XMDMADDR_3: GPE1[3] */
s5p_gpio_direction_output(&gpio1->e1, 3, 1);
break;
}
/*
* eMMC GPIO:
* SDR 8-bit@48MHz at MMC0
* GPK0[0] SD_0_CLK(2)
* GPK0[1] SD_0_CMD(2)
* GPK0[2] SD_0_CDn -> Not used
* GPK0[3:6] SD_0_DATA[0:3](2)
* GPK1[3:6] SD_0_DATA[0:3](3)
*
* DDR 4-bit@26MHz at MMC4
* GPK0[0] SD_4_CLK(3)
* GPK0[1] SD_4_CMD(3)
* GPK0[2] SD_4_CDn -> Not used
* GPK0[3:6] SD_4_DATA[0:3](3)
* GPK1[3:6] SD_4_DATA[4:7](4)
*/
for (i = 0; i < 7; i++) {
if (i == 2)
continue;
/* GPK0[0:6] special function 2 */
s5p_gpio_cfg_pin(&gpio2->k0, i, 0x2);
/* GPK0[0:6] pull disable */
s5p_gpio_set_pull(&gpio2->k0, i, GPIO_PULL_NONE);
/* GPK0[0:6] drv 4x */
s5p_gpio_set_drv(&gpio2->k0, i, GPIO_DRV_4X);
}
for (i = 3; i < 7; i++) {
/* GPK1[3:6] special function 3 */
s5p_gpio_cfg_pin(&gpio2->k1, i, 0x3);
/* GPK1[3:6] pull disable */
s5p_gpio_set_pull(&gpio2->k1, i, GPIO_PULL_NONE);
/* GPK1[3:6] drv 4x */
s5p_gpio_set_drv(&gpio2->k1, i, GPIO_DRV_4X);
}
/* T-flash detect */
s5p_gpio_cfg_pin(&gpio2->x3, 4, 0xf);
s5p_gpio_set_pull(&gpio2->x3, 4, GPIO_PULL_UP);
/*
* MMC device init
* mmc0 : eMMC (8-bit buswidth)
* mmc2 : SD card (4-bit buswidth)
*/
err = s5p_mmc_init(0, 8);
/*
* Check the T-flash detect pin
* GPX3[4] T-flash detect pin
*/
if (!s5p_gpio_get_value(&gpio2->x3, 4)) {
/*
* SD card GPIO:
* GPK2[0] SD_2_CLK(2)
* GPK2[1] SD_2_CMD(2)
* GPK2[2] SD_2_CDn -> Not used
* GPK2[3:6] SD_2_DATA[0:3](2)
*/
for (i = 0; i < 7; i++) {
if (i == 2)
continue;
/* GPK2[0:6] special function 2 */
s5p_gpio_cfg_pin(&gpio2->k2, i, 0x2);
/* GPK2[0:6] pull disable */
s5p_gpio_set_pull(&gpio2->k2, i, GPIO_PULL_NONE);
/* GPK2[0:6] drv 4x */
s5p_gpio_set_drv(&gpio2->k2, i, GPIO_DRV_4X);
}
err = s5p_mmc_init(2, 4);
}
return err;
}
#endif
#ifdef CONFIG_USB_GADGET
static int s5pc210_phy_control(int on)
{
int ret = 0;
struct pmic *p = get_pmic();
if (pmic_probe(p))
return -1;
if (on) {
ret |= pmic_set_output(p,
MAX8998_REG_BUCK_ACTIVE_DISCHARGE3,
MAX8998_SAFEOUT1, LDO_ON);
ret |= pmic_set_output(p, MAX8998_REG_ONOFF1,
MAX8998_LDO3, LDO_ON);
ret |= pmic_set_output(p, MAX8998_REG_ONOFF2,
MAX8998_LDO8, LDO_ON);
} else {
ret |= pmic_set_output(p, MAX8998_REG_ONOFF2,
MAX8998_LDO8, LDO_OFF);
ret |= pmic_set_output(p, MAX8998_REG_ONOFF1,
MAX8998_LDO3, LDO_OFF);
ret |= pmic_set_output(p,
MAX8998_REG_BUCK_ACTIVE_DISCHARGE3,
MAX8998_SAFEOUT1, LDO_OFF);
}
if (ret) {
puts("MAX8998 LDO setting error!\n");
return -1;
}
return 0;
}
struct s3c_plat_otg_data s5pc210_otg_data = {
.phy_control = s5pc210_phy_control,
.regs_phy = EXYNOS4_USBPHY_BASE,
.regs_otg = EXYNOS4_USBOTG_BASE,
.usb_phy_ctrl = EXYNOS4_USBPHY_CONTROL,
.usb_flags = PHY0_SLEEP,
};
#endif