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author | root <root@artemis.panaceas.org> | 2015-12-25 04:40:36 +0000 |
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committer | root <root@artemis.panaceas.org> | 2015-12-25 04:40:36 +0000 |
commit | 849369d6c66d3054688672f97d31fceb8e8230fb (patch) | |
tree | 6135abc790ca67dedbe07c39806591e70eda81ce /arch/arm/mach-u300/mmc.c | |
download | linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.tar.gz linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.tar.bz2 linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.zip |
initial_commit
Diffstat (limited to 'arch/arm/mach-u300/mmc.c')
-rw-r--r-- | arch/arm/mach-u300/mmc.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/arm/mach-u300/mmc.c b/arch/arm/mach-u300/mmc.c new file mode 100644 index 00000000..677ccef5 --- /dev/null +++ b/arch/arm/mach-u300/mmc.c @@ -0,0 +1,68 @@ +/* + * + * arch/arm/mach-u300/mmc.c + * + * + * Copyright (C) 2009 ST-Ericsson SA + * License terms: GNU General Public License (GPL) version 2 + * + * Author: Linus Walleij <linus.walleij@stericsson.com> + * Author: Johan Lundin + * Author: Jonas Aaberg <jonas.aberg@stericsson.com> + */ +#include <linux/device.h> +#include <linux/amba/bus.h> +#include <linux/mmc/host.h> +#include <linux/gpio.h> +#include <linux/dmaengine.h> +#include <linux/amba/mmci.h> +#include <linux/slab.h> +#include <mach/coh901318.h> +#include <mach/dma_channels.h> + +#include "mmc.h" +#include "padmux.h" + +static struct mmci_platform_data mmc0_plat_data = { + /* + * Do not set ocr_mask or voltage translation function, + * we have a regulator we can control instead. + */ + /* Nominally 2.85V on our platform */ + .f_max = 24000000, + .gpio_wp = -1, + .gpio_cd = U300_GPIO_PIN_MMC_CD, + .cd_invert = true, + .capabilities = MMC_CAP_MMC_HIGHSPEED | + MMC_CAP_SD_HIGHSPEED | MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA, +#ifdef CONFIG_COH901318 + .dma_filter = coh901318_filter_id, + .dma_rx_param = (void *) U300_DMA_MMCSD_RX_TX, + /* Don't specify a TX channel, this RX channel is bidirectional */ +#endif +}; + +int __devinit mmc_init(struct amba_device *adev) +{ + struct device *mmcsd_device = &adev->dev; + struct pmx *pmx; + int ret = 0; + + mmcsd_device->platform_data = &mmc0_plat_data; + + /* + * Setup padmuxing for MMC. Since this must always be + * compiled into the kernel, pmx is never released. + */ + pmx = pmx_get(mmcsd_device, U300_APP_PMX_MMC_SETTING); + + if (IS_ERR(pmx)) + pr_warning("Could not get padmux handle\n"); + else { + ret = pmx_activate(mmcsd_device, pmx); + if (IS_ERR_VALUE(ret)) + pr_warning("Could not activate padmuxing\n"); + } + + return ret; +} |