After Reset VMMC goes to default VSEL. This is not a clean power cycle for some SD cards. Set flag WR_S for VMMC to avoid going to default VSEL. Signed-off-by: Jan Weitzel <j.weitzel@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/*
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* Copyright (C) 2011 Alexander Aring <a.aring@phytec.de
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <io.h>
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#include <mfd/twl6030.h>
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/* MMC voltage */
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#define OMAP4_CONTROL_PBIASLITE 0x4A100600
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#define OMAP4_MMC1_PBIASLITE_VMODE (1<<21)
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#define OMAP4_MMC1_PBIASLITE_PWRDNZ (1<<22)
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#define OMAP4_MMC1_PWRDNZ (1<<26)
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static void twl6030_mci_write(u8 address, u8 data)
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{
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int ret;
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struct twl6030 *twl6030 = twl6030_get();
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ret = twl6030_reg_write(twl6030, address, data);
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if (ret != 0)
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printf("TWL6030 Write[0x%x] Error %d\n", address, ret);
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}
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void set_up_mmc_voltage_omap4(void)
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{
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u32 value;
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value = readl(OMAP4_CONTROL_PBIASLITE);
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value &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ | OMAP4_MMC1_PWRDNZ);
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writel(value, OMAP4_CONTROL_PBIASLITE);
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twl6030_mci_write(TWL6030_PMCS_VMMC_CFG_VOLTAGE,
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TWL6030_VMMC_WR_S |
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TWL6030_VMMC_VSEL_0 | TWL6030_VMMC_VSEL_2 |
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TWL6030_VMMC_VSEL_4);
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twl6030_mci_write(TWL6030_PMCS_VMMC_CFG_STATE,
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TWL6030_VMMC_STATE0 | TWL6030_VMMC_GRP_APP);
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value = readl(OMAP4_CONTROL_PBIASLITE);
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value |= (OMAP4_MMC1_PBIASLITE_VMODE | OMAP4_MMC1_PBIASLITE_PWRDNZ |
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OMAP4_MMC1_PWRDNZ);
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writel(value, OMAP4_CONTROL_PBIASLITE);
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}
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EXPORT_SYMBOL(set_up_mmc_voltage_omap4);
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