ec8f12533b
This will configure the platform data for the PL180, PL011 and PL022 PrimeCells found in the U300 to use DMA with the generic PrimeCell DMA engine for COH 901 318. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
69 lines
1.7 KiB
C
69 lines
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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