[U-Boot] [PATCH v1 5/6] mmc: kona: Add Kona mmc driver

Jaehoon Chung
2014-02-04T01:12:12Z

On 02/04/2014 06:03 AM, Darwin Rambo wrote:
> Add support for the Kona SDHCI found on Broadcom mobile SoCs.
>
> Signed-off-by: Darwin Rambo <drambo@broadcom.com>
> Reviewed-by: Steve Rae <srae@broadcom.com>
> Reviewed-by: Tim Kryger <tkryger@linaro.org>
> ---
> drivers/mmc/Makefile | 1 +
> drivers/mmc/kona_sdhci.c | 125 ++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 126 insertions(+)
> create mode 100644 drivers/mmc/kona_sdhci.c
>
> diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
> index e793ed9..931922b 100644
> --- a/drivers/mmc/Makefile
> +++ b/drivers/mmc/Makefile
> @@ -21,6 +21,7 @@ obj-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
> obj-$(CONFIG_PXA_MMC_GENERIC) += pxa_mmc_gen.o
> obj-$(CONFIG_SDHCI) += sdhci.o
> obj-$(CONFIG_BCM2835_SDHCI) += bcm2835_sdhci.o
> +obj-$(CONFIG_KONA_SDHCI) += kona_sdhci.o
> obj-$(CONFIG_S5P_SDHCI) += s5p_sdhci.o
> obj-$(CONFIG_SH_MMCIF) += sh_mmcif.o
> obj-$(CONFIG_SPEAR_SDHCI) += spear_sdhci.o
> diff --git a/drivers/mmc/kona_sdhci.c b/drivers/mmc/kona_sdhci.c
> new file mode 100644
> index 0000000..69e6f17
> --- /dev/null
> +++ b/drivers/mmc/kona_sdhci.c
> @@ -0,0 +1,125 @@
> +/*
> + * Copyright 2013 Broadcom Corporation. All rights reserved.
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <malloc.h>
> +#include <sdhci.h>
> +#include <asm/errno.h>
> +#include <asm/kona-common/clk.h>
> +
> +#define SDHCI_CORECTRL_OFFSET 0x00008000
> +#define SDHCI_CORECTRL_EN 0x01
> +#define SDHCI_CORECTRL_RESET 0x02
> +
> +#define SDHCI_CORESTAT_OFFSET 0x00008004
> +#define SDHCI_CORESTAT_CD_SW 0x01
> +
> +#define SDHCI_COREIMR_OFFSET 0x00008008
> +#define SDHCI_COREIMR_IP 0x01
> +
> +static int init_mmc_core(struct sdhci_host *host)

I think that function name is used to "_kona_".
This function isn't general mmc function, right?

Best Regards,
Jaehoon Chung

> +{
> + unsigned int mask;
> + unsigned int timeout;
> +
> + if (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & SDHCI_RESET_ALL) {
> + printf("%s: sd host controller reset error\n", __func__);
> + return 1;
> + }
> +
> + /* For kona a hardware reset before anything else. */
> + mask = sdhci_readl(host, SDHCI_CORECTRL_OFFSET) | SDHCI_CORECTRL_RESET;
> + sdhci_writel(host, mask, SDHCI_CORECTRL_OFFSET);
> +
> + /* Wait max 100 ms */
> + timeout = 1000;
> + do {
> + if (timeout == 0) {
> + printf("%s: reset timeout error\n", __func__);
> + return 1;
> + }
> + timeout--;
> + udelay(100);
> + } while (0 ==
> + (sdhci_readl(host, SDHCI_CORECTRL_OFFSET) &
> + SDHCI_CORECTRL_RESET));
> +
> + /* Clear the reset bit. */
> + mask = mask & ~SDHCI_CORECTRL_RESET;
> + sdhci_writel(host, mask, SDHCI_CORECTRL_OFFSET);
> + udelay(10);
> +
> + /* Enable AHB clock */
> + mask = sdhci_readl(host, SDHCI_CORECTRL_OFFSET);
> + sdhci_writel(host, mask | SDHCI_CORECTRL_EN, SDHCI_CORECTRL_OFFSET);
> +
> + /* Enable interrupts */
> + sdhci_writel(host, SDHCI_COREIMR_IP, SDHCI_COREIMR_OFFSET);
> +
> + /* Make sure Card is detected in controller */
> + mask = sdhci_readl(host, SDHCI_CORESTAT_OFFSET);
> + sdhci_writel(host, mask | SDHCI_CORESTAT_CD_SW, SDHCI_CORESTAT_OFFSET);
> +
> + return 0;
> +}
> +
> +int kona_sdhci_init(int dev_index, u32 min_clk, u32 quirks)
> +{
> + int ret = 0;
> + u32 max_clk;
> + void *reg_base;
> + struct sdhci_host *host = NULL;
> +
> + host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
> + if (!host) {
> + printf("%s: sdhci host malloc fail!\n", __func__);
> + return -ENOMEM;
> + }
> + switch (dev_index) {
> + case 0:
> + reg_base = (void *)CONFIG_SYS_SDIO_BASE0;
> + ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO0_MAX_CLK,
> + &max_clk);
> + break;
> + case 1:
> + reg_base = (void *)CONFIG_SYS_SDIO_BASE1;
> + ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO1_MAX_CLK,
> + &max_clk);
> + break;
> + case 2:
> + reg_base = (void *)CONFIG_SYS_SDIO_BASE2;
> + ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO2_MAX_CLK,
> + &max_clk);
> + break;
> + case 3:
> + reg_base = (void *)CONFIG_SYS_SDIO_BASE3;
> + ret = clk_sdio_enable(reg_base, CONFIG_SYS_SDIO3_MAX_CLK,
> + &max_clk);
> + break;
> + default:
> + printf("%s: sdio dev index %d not supported\n",
> + __func__, dev_index);
> + ret = -EINVAL;
> + }
> + if (ret)
> + return ret;
> +
> + host->name = "kona-sdhci";
> + host->ioaddr = reg_base;
> + host->quirks = quirks;
> + host->host_caps = MMC_MODE_HC;
> +
> + if (init_mmc_core(host))
> + return -EINVAL;
> +
> + if (quirks & SDHCI_QUIRK_REG32_RW)
> + host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
> + else
> + host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
> +
> + add_sdhci(host, max_clk, min_clk);
> + return ret;
> +}
>