69 строки
1.7 KiB
C
69 строки
1.7 KiB
C
/*
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*
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* arch/arm/mach-u300/mmc.c
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*
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*
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* Copyright (C) 2009 ST-Ericsson SA
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* License terms: GNU General Public License (GPL) version 2
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*
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* Author: Linus Walleij <linus.walleij@stericsson.com>
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* Author: Johan Lundin
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* Author: Jonas Aaberg <jonas.aberg@stericsson.com>
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*/
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#include <linux/device.h>
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#include <linux/amba/bus.h>
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#include <linux/mmc/host.h>
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#include <linux/gpio.h>
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#include <linux/dmaengine.h>
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#include <linux/amba/mmci.h>
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#include <linux/slab.h>
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#include <mach/coh901318.h>
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#include <mach/dma_channels.h>
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#include "mmc.h"
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#include "padmux.h"
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static struct mmci_platform_data mmc0_plat_data = {
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/*
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* Do not set ocr_mask or voltage translation function,
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* we have a regulator we can control instead.
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*/
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/* Nominally 2.85V on our platform */
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.f_max = 24000000,
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.gpio_wp = -1,
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.gpio_cd = U300_GPIO_PIN_MMC_CD,
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.cd_invert = true,
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.capabilities = MMC_CAP_MMC_HIGHSPEED |
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MMC_CAP_SD_HIGHSPEED | MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
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#ifdef CONFIG_COH901318
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.dma_filter = coh901318_filter_id,
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.dma_rx_param = (void *) U300_DMA_MMCSD_RX_TX,
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/* Don't specify a TX channel, this RX channel is bidirectional */
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#endif
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};
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int __devinit mmc_init(struct amba_device *adev)
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{
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struct device *mmcsd_device = &adev->dev;
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struct pmx *pmx;
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int ret = 0;
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mmcsd_device->platform_data = &mmc0_plat_data;
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/*
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* Setup padmuxing for MMC. Since this must always be
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* compiled into the kernel, pmx is never released.
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*/
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pmx = pmx_get(mmcsd_device, U300_APP_PMX_MMC_SETTING);
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if (IS_ERR(pmx))
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pr_warning("Could not get padmux handle\n");
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else {
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ret = pmx_activate(mmcsd_device, pmx);
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if (IS_ERR_VALUE(ret))
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pr_warning("Could not activate padmuxing\n");
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}
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return ret;
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}
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