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/*
* (C) Copyright 2012 SAMSUNG Electronics
* Jaehoon Chung <jh80.chung@samsung.com>
*
* 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 <malloc.h>
#include <sdhci.h>
#include <asm/arch/mmc.h>
static char *S5P_NAME = "SAMSUNG SDHCI";
static void s5p_sdhci_set_control_reg(struct sdhci_host *host)
{
unsigned long val, ctrl;
/*
* SELCLKPADDS[17:16]
* 00 = 2mA
* 01 = 4mA
* 10 = 7mA
* 11 = 9mA
*/
sdhci_writel(host, SDHCI_CTRL4_DRIVE_MASK(0x3), SDHCI_CONTROL4);
val = sdhci_readl(host, SDHCI_CONTROL2);
val &= SDHCI_CTRL2_SELBASECLK_SHIFT;
val |= SDHCI_CTRL2_ENSTAASYNCCLR |
SDHCI_CTRL2_ENCMDCNFMSK |
SDHCI_CTRL2_ENFBCLKRX |
SDHCI_CTRL2_ENCLKOUTHOLD;
sdhci_writel(host, val, SDHCI_CONTROL2);
/*
* FCSEL3[31] FCSEL2[23] FCSEL1[15] FCSEL0[7]
* FCSel[1:0] : Rx Feedback Clock Delay Control
* Inverter delay means10ns delay if SDCLK 50MHz setting
* 01 = Delay1 (basic delay)
* 11 = Delay2 (basic delay + 2ns)
* 00 = Delay3 (inverter delay)
* 10 = Delay4 (inverter delay + 2ns)
*/
val = SDHCI_CTRL3_FCSEL3 | SDHCI_CTRL3_FCSEL1;
sdhci_writel(host, val, SDHCI_CONTROL3);
/*
* SELBASECLK[5:4]
* 00/01 = HCLK
* 10 = EPLL
* 11 = XTI or XEXTCLK
*/
ctrl = sdhci_readl(host, SDHCI_CONTROL2);
ctrl &= ~SDHCI_CTRL2_SELBASECLK_MASK(0x3);
ctrl |= SDHCI_CTRL2_SELBASECLK_MASK(0x2);
sdhci_writel(host, ctrl, SDHCI_CONTROL2);
}
int s5p_sdhci_init(u32 regbase, u32 max_clk, u32 min_clk, u32 quirks)
{
struct sdhci_host *host = NULL;
host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
if (!host) {
printf("sdhci__host malloc fail!\n");
return 1;
}
host->name = S5P_NAME;
host->ioaddr = (void *)regbase;
host->quirks = quirks;
host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE;
host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
if (quirks & SDHCI_QUIRK_REG32_RW)
host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
else
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
host->set_control_reg = &s5p_sdhci_set_control_reg;
host->host_caps = MMC_MODE_HC;
add_sdhci(host, max_clk, min_clk);
return 0;
}
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