From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaehoon Chung Date: Tue, 04 Feb 2014 10:12:12 +0900 Subject: [U-Boot] [PATCH v1 5/6] mmc: kona: Add Kona mmc driver In-Reply-To: <1391461382-24986-6-git-send-email-drambo@broadcom.com> References: <1391461382-24986-1-git-send-email-drambo@broadcom.com> <1391461382-24986-6-git-send-email-drambo@broadcom.com> Message-ID: <52F03E6C.8000703@samsung.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 > Reviewed-by: Steve Rae > Reviewed-by: Tim Kryger > --- > 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 > +#include > +#include > +#include > +#include > + > +#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; > +} >