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Tegra30: MMC: Add SD bus power-rail and SDMMC pad init routines 

T30 requires specific SDMMC pad programming, and bus power-rail bringup.

Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Tom Warren 2013-02-26 12:26:55 -07:00
parent 38797bcb1f
commit 190be1f9b7
2 changed files with 81 additions and 1 deletions
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51
board/nvidia/cardhu/cardhu.c
View File

@ -25,6 +25,10 @@
#include <asm/arch/pinmux.h>
#include <asm/arch/gp_padctrl.h>
#include "pinmux-config-cardhu.h"
#include <i2c.h>
#define PMU_I2C_ADDRESS 0x2D
#define MAX_I2C_RETRY 3
/*
* Routine: pinmux_init
@ -41,3 +45,50 @@ void pinmux_init(void)
/* Initialize any non-default pad configs (APB_MISC_GP regs) */
padgrp_config_table(cardhu_padctrl, ARRAY_SIZE(cardhu_padctrl));
}
#if defined(CONFIG_TEGRA_MMC)
/*
* Do I2C/PMU writes to bring up SD card bus power
*
*/
void board_sdmmc_voltage_init(void)
{
uchar reg, data_buffer[1];
int i;
i2c_set_bus_num(0); /* PMU is on bus 0 */
/* TPS659110: LDO5_REG = 3.3v, ACTIVE to SDMMC1 */
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);
}
/* TPS659110: GPIO7_REG = PDEN, output a 1 to EN_3V3_SYS */
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);
}
}
/*
* Routine: pin_mux_mmc
* Description: setup the MMC muxes, power rails, etc.
*/
void pin_mux_mmc(void)
{
/*
* NOTE: We don't do mmc-specific pin muxes here.
* They were done globally in pinmux_init().
*/
/* Bring up the SDIO1 power rail */
board_sdmmc_voltage_init();
}
#endif /* MMC */

31
board/nvidia/common/board.c
View File

@ -49,6 +49,7 @@
#include <asm/arch-tegra/usb.h>
#endif
#ifdef CONFIG_TEGRA_MMC
#include <asm/arch-tegra/tegra_mmc.h>
#include <asm/arch-tegra/mmc.h>
#endif
#include <i2c.h>
@ -245,4 +246,32 @@ int board_mmc_init(bd_t *bd)
return 0;
}
#endif
void pad_init_mmc(struct mmc_host *host)
{
#if defined(CONFIG_TEGRA30)
enum periph_id id = host->mmc_id;
u32 val;
debug("%s: sdmmc address = %08x, id = %d\n", __func__,
(unsigned int)host->reg, id);
/* Set the pad drive strength for SDMMC1 or 3 only */
if (id != PERIPH_ID_SDMMC1 && id != PERIPH_ID_SDMMC3) {
debug("%s: settings are only valid for SDMMC1/SDMMC3!\n",
__func__);
return;
}
val = readl(&host->reg->sdmemcmppadctl);
val &= 0xFFFFFFF0;
val |= MEMCOMP_PADCTRL_VREF;
writel(val, &host->reg->sdmemcmppadctl);
val = readl(&host->reg->autocalcfg);
val &= 0xFFFF0000;
val |= AUTO_CAL_PU_OFFSET | AUTO_CAL_PD_OFFSET | AUTO_CAL_ENABLED;
writel(val, &host->reg->autocalcfg);
#endif /* T30 */
}
#endif /* MMC */