From a3b59b1523727da932b284737fbfc93a7f962125 Mon Sep 17 00:00:00 2001 From: Wenyou Yang Date: Mon, 2 Nov 2015 10:57:09 +0800 Subject: [PATCH] mmc: atmel: Add atmel sdhci support MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The SDHCI is introduced by sama5d2, named as Secure Digital Multimedia Card Controller(SDMMC). It supports the embedded MultiMedia Card (e.MMC) Specification V4.41, the SD Memory Card Specification V3.0, and the SDIO V3.0 specification. It is compliant with the SD Host Controller Standard V3.0 specification. Signed-off-by: Wenyou Yang Reviewed-by: Andreas Bießmann --- arch/arm/mach-at91/include/mach/atmel_sdhci.h | 13 ++++++ drivers/mmc/Makefile | 1 + drivers/mmc/atmel_sdhci.c | 40 +++++++++++++++++++ 3 files changed, 54 insertions(+) create mode 100644 arch/arm/mach-at91/include/mach/atmel_sdhci.h create mode 100644 drivers/mmc/atmel_sdhci.c diff --git a/arch/arm/mach-at91/include/mach/atmel_sdhci.h b/arch/arm/mach-at91/include/mach/atmel_sdhci.h new file mode 100644 index 0000000000..9652bc20c8 --- /dev/null +++ b/arch/arm/mach-at91/include/mach/atmel_sdhci.h @@ -0,0 +1,13 @@ +/* + * Copyright (c) 2015 Atmel Corporation + * Wenyou.Yang + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ATMEL_SDHCI_H +#define __ATMEL_SDHCI_H + +int atmel_sdhci_init(void *regbase, u32 id); + +#endif diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index 99d02954ed..5d357056dd 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_DM_MMC) += mmc-uclass.o obj-$(CONFIG_ARM_PL180_MMCI) += arm_pl180_mmci.o +obj-$(CONFIG_ATMEL_SDHCI) += atmel_sdhci.o obj-$(CONFIG_BCM2835_SDHCI) += bcm2835_sdhci.o obj-$(CONFIG_BFIN_SDH) += bfin_sdh.o obj-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o diff --git a/drivers/mmc/atmel_sdhci.c b/drivers/mmc/atmel_sdhci.c new file mode 100644 index 0000000000..24b68b640b --- /dev/null +++ b/drivers/mmc/atmel_sdhci.c @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2015 Atmel Corporation + * Wenyou.Yang + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include + +#define ATMEL_SDHC_MIN_FREQ 400000 + +int atmel_sdhci_init(void *regbase, u32 id) +{ + struct sdhci_host *host; + u32 max_clk, min_clk = ATMEL_SDHC_MIN_FREQ; + + host = (struct sdhci_host *)calloc(1, sizeof(struct sdhci_host)); + if (!host) { + printf("%s: sdhci_host calloc failed\n", __func__); + return -ENOMEM; + } + + host->name = "atmel_sdhci"; + host->ioaddr = regbase; + host->quirks = 0; + host->version = sdhci_readw(host, SDHCI_HOST_VERSION); + max_clk = at91_get_periph_generated_clk(id); + if (!max_clk) { + printf("%s: Failed to get the proper clock\n", __func__); + free(host); + return -ENODEV; + } + + add_sdhci(host, max_clk, min_clk); + + return 0; +} -- 2.25.1