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/*
* (C) Copyright 2010-2012
* NVIDIA Corporation <www.nvidia.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/pinmux.h>
#include "pinmux-config-cardhu.h"
#include <asm/arch/clock.h>
#include <asm/arch/gp_padctrl.h>
#include <asm/arch/pmu.h>
#include <asm/arch/sdmmc.h>
#include <asm/arch-tegra/mmc.h>
#include <asm/arch-tegra/tegra_mmc.h>
#include <mmc.h>
#include <i2c.h>
/*
* Routine: pinmux_init
* Description: Do individual peripheral pinmux configs
*/
void pinmux_init(void)
{
pinmux_config_table(tegra3_pinmux_common,
ARRAY_SIZE(tegra3_pinmux_common));
pinmux_config_table(unused_pins_lowpower,
ARRAY_SIZE(unused_pins_lowpower));
}
#if defined(CONFIG_MMC)
/*
* Routine: pin_mux_mmc
* Description: setup the pin muxes/tristate values for the SDMMC(s)
*/
static void pin_mux_mmc(void)
{
}
/* Do I2C/PMU writes to bring up SD card bus power */
static void board_sdmmc_voltage_init(void)
{
uchar reg, data_buffer[1];
int i;
i2c_set_bus_num(0); /* PMU is on bus 0 */
data_buffer[0] = 0x65;
reg = 0x32;
for (i = 0; i < MAX_I2C_RETRY; ++i) {
if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1))
udelay(100);
}
data_buffer[0] = 0x09;
reg = 0x67;
for (i = 0; i < MAX_I2C_RETRY; ++i) {
if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1))
udelay(100);
}
}
static void pad_init_mmc(struct tegra_mmc *reg)
{
struct apb_misc_gp_ctlr *const gpc =
(struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;
struct sdmmc_ctlr *const sdmmc = (struct sdmmc_ctlr *)reg;
u32 val, offset = (unsigned int)reg;
u32 padcfg, padmask;
debug("%s: sdmmc address = %08x\n", __func__, (unsigned int)sdmmc);
/* Set the pad drive strength for SDMMC1 or 3 only */
if (offset != TEGRA_SDMMC1_BASE && offset != TEGRA_SDMMC3_BASE) {
debug("%s: settings are only valid for SDMMC1/SDMMC3!\n",
__func__);
return;
}
/* Set pads as per T30 TRM, section 24.6.1.2 */
padcfg = (GP_SDIOCFG_DRVUP_SLWF | GP_SDIOCFG_DRVDN_SLWR | \
GP_SDIOCFG_DRVUP | GP_SDIOCFG_DRVDN);
padmask = 0x00000FFF;
if (offset == TEGRA_SDMMC1_BASE) {
val = readl(&gpc->sdio1cfg);
val &= padmask;
val |= padcfg;
writel(val, &gpc->sdio1cfg);
} else { /* SDMMC3 */
val = readl(&gpc->sdio3cfg);
val &= padmask;
val |= padcfg;
writel(val, &gpc->sdio3cfg);
}
val = readl(&sdmmc->sdmmc_sdmemcomp_pad_ctrl);
val &= 0xFFFFFFF0;
val |= MEMCOMP_PADCTRL_VREF;
writel(val, &sdmmc->sdmmc_sdmemcomp_pad_ctrl);
val = readl(&sdmmc->sdmmc_auto_cal_config);
val &= 0xFFFF0000;
val |= AUTO_CAL_PU_OFFSET | AUTO_CAL_PD_OFFSET | AUTO_CAL_ENABLED;
writel(val, &sdmmc->sdmmc_auto_cal_config);
}
/* this is a weak define that we are overriding */
int board_mmc_init(bd_t *bd)
{
debug("board_mmc_init called\n");
/* Turn on SD-card bus power */
board_sdmmc_voltage_init();
/* Set up the SDMMC pads as per the TRM */
pad_init_mmc((struct tegra_mmc *)TEGRA_SDMMC1_BASE);
/* Enable muxes, etc. for SDMMC controllers */
pin_mux_mmc();
/* init dev 0 (SDMMC4), ("HSMMC") with 8-bit bus */
tegra_mmc_init(0, 8, -1, -1);
/* init dev 1 (SDMMC0), ("SDIO") with 8-bit bus */
tegra_mmc_init(1, 8, -1, -1);
return 0;
}
#endif /* MMC */
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