On Sat, December 14, 2013, Zhangfei Gao wrote:
> Add dw_mmc-k3.c for k3v2, support sd/emmc
>
> Signed-off-by: Zhangfei Gao <zhangfei.gao@xxxxxxxxxx>
> Signed-off-by: Zhigang Wang <brooke.wangzhigang@xxxxxxxxxx>
> ---
> .../devicetree/bindings/mmc/k3-dw-mshc.txt | 60 +++++++++
> drivers/mmc/host/Kconfig | 10 ++
> drivers/mmc/host/Makefile | 1 +
> drivers/mmc/host/dw_mmc-k3.c | 133 ++++++++++++++++++++
> 4 files changed, 204 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
> create mode 100644 drivers/mmc/host/dw_mmc-k3.c
>
> diff --git a/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
> b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
> new file mode 100644
> index 000000000000..d7e2d7f159bb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/k3-dw-mshc.txt
> @@ -0,0 +1,60 @@
> +* Hisilicon specific extensions to the Synopsys Designware Mobile
> + Storage Host Controller
> +
> +Read synopsys-dw-mshc.txt for more details
> +
> +The Synopsys designware mobile storage host controller is used to interface
> +a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
> +differences between the core Synopsys dw mshc controller properties described
> +by synopsys-dw-mshc.txt and the properties used by the Hisilicon specific
> +extensions to the Synopsys Designware Mobile Storage Host Controller.
> +
> +Required Properties:
> +
> +* compatible: should be one of the following.
> + - "hisilicon,hi4511-dw-mshc": for controllers with hi4511 specific extentions.
> +
> +* clock-freq-table: should be the frequency (in Hz) array of the ciu clock
> + in each supported mode.
> + 0. CIU clock rate in Hz for DS mode
> + 1. CIU clock rate in Hz for MMC HS mode
> + 2. CIU clock rate in Hz for SD HS mode
> + 3. CIU clock rate in Hz for SDR12 mode
> + 4. CIU clock rate in Hz for SDR25 mode
> + 5. CIU clock rate in Hz for SDR50 mode
> + 6. CIU clock rate in Hz for SDR104 mode
> + 7. CIU clock rate in Hz for DDR50 mode
> + 8. CIU clock rate in Hz for HS200 mode
> +
> +Example:
> +
> + /* for Hi3620 */
> +
> + /* SoC portion */
> + dwmmc_0: dwmmc0@fcd03000 {
> + compatible = "hisilicon,hi4511-dw-mshc";
> + reg = <0xfcd03000 0x1000>;
> + interrupts = <0 16 4>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + clocks = <&mmc_clock HI3620_SD_CIUCLK>, <&clock HI3620_DDRC_PER_CLK>;
> + clock-names = "ciu", "biu";
> + clock-freq-table =
> + <25000000 0 50000000 25000000 50000000 100000000 0 50000000>;
I think it could be solved with mmc->f_min and mmc->f_max(from clock-freq-min-max property)
if there is no limitation per each speed mode. As seeing described table, it looks that.
> + };
> +
> + /* Board portion */
> + dwmmc0@fcd03000 {
> + num-slots = <1>;
> + vmmc-supply = <&ldo12>;
> + fifo-depth = <0x100>;
> + supports-highspeed;
> + pinctrl-names = "default";
> + pinctrl-0 = <&sd_pmx_pins &sd_cfg_func1 &sd_cfg_func2>;
> + slot@0 {
> + reg = <0>;
> + bus-width = <4>;
> + disable-wp;
> + cd-gpios = <&gpio10 3 0>;
> + };
> + };
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 7fc5099e44b2..45aaa2de0f58 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -575,6 +575,16 @@ config MMC_DW_SOCFPGA
> This selects support for Altera SoCFPGA specific extensions to the
> Synopsys DesignWare Memory Card Interface driver.
>
> +config MMC_DW_K3
> + tristate "K3 specific extensions for Synopsys DW Memory Card Interface"
> + depends on MMC_DW
> + select MMC_DW_PLTFM
> + select MMC_DW_IDMAC
> + help
> + This selects support for Hisilicon K3 SoC specific extensions to the
> + Synopsys DesignWare Memory Card Interface driver. Select this option
> + for platforms based on Hisilicon K3 SoC's.
> +
> config MMC_DW_PCI
> tristate "Synopsys Designware MCI support on PCI bus"
> depends on MMC_DW && PCI
> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> index c41d0c364509..64f5f8d35839 100644
> --- a/drivers/mmc/host/Makefile
> +++ b/drivers/mmc/host/Makefile
> @@ -43,6 +43,7 @@ obj-$(CONFIG_MMC_DW) += dw_mmc.o
> obj-$(CONFIG_MMC_DW_PLTFM) += dw_mmc-pltfm.o
> obj-$(CONFIG_MMC_DW_EXYNOS) += dw_mmc-exynos.o
> obj-$(CONFIG_MMC_DW_SOCFPGA) += dw_mmc-socfpga.o
> +obj-$(CONFIG_MMC_DW_K3) += dw_mmc-k3.o
> obj-$(CONFIG_MMC_DW_PCI) += dw_mmc-pci.o
> obj-$(CONFIG_MMC_SH_MMCIF) += sh_mmcif.o
> obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
> diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
> new file mode 100644
> index 000000000000..90ebee0ce5ef
> --- /dev/null
> +++ b/drivers/mmc/host/dw_mmc-k3.c
> @@ -0,0 +1,133 @@
> +/*
> + * Copyright (c) 2013 Linaro Ltd.
> + * Copyright (c) 2013 Hisilicon Limited.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/clk.h>
> +#include <linux/mmc/host.h>
> +#include <linux/mmc/dw_mmc.h>
> +#include <linux/of_address.h>
> +
> +#include "dw_mmc.h"
> +#include "dw_mmc-pltfm.h"
> +
> +#define MAX_NUMS 10
> +struct dw_mci_k3_priv_data {
> + u32 clk_table[MAX_NUMS];
> +};
> +
> +static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
> +{
> + struct dw_mci_k3_priv_data *priv = host->priv;
> + u32 rate = priv->clk_table[ios->timing];
> + int ret;
> +
> + ret = clk_set_rate(host->ciu_clk, rate);
> + if (ret)
> + dev_warn(host->dev, "failed to set clock rate %uHz\n", rate);
> +
> + host->bus_hz = clk_get_rate(host->ciu_clk);
> +}
> +
> +static int dw_mci_k3_parse_dt(struct dw_mci *host)
> +{
> + struct dw_mci_k3_priv_data *priv;
> + struct device_node *node = host->dev->of_node;
> + struct property *prop;
> + const __be32 *cur;
> + u32 val, num = 0;
> +
> + priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv) {
> + dev_err(host->dev, "mem alloc failed for private data\n");
> + return -ENOMEM;
> + }
> + host->priv = priv;
> +
> + of_property_for_each_u32(node, "clock-freq-table", prop, cur, val) {
> + if (num >= MAX_NUMS)
> + break;
> + priv->clk_table[num++] = val;
> + }
> + return 0;
> +}
> +
> +static unsigned long k3_dwmmc_caps[4] = {
> + MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED,
> + MMC_CAP_8_BIT_DATA | MMC_CAP_MMC_HIGHSPEED,
> + 0,
> + 0,
> +};
> +
> +static const struct dw_mci_drv_data k3_drv_data = {
> + .caps = k3_dwmmc_caps,
> + .set_ios = dw_mci_k3_set_ios,
> + .parse_dt = dw_mci_k3_parse_dt,
> +};
> +
> +static const struct of_device_id dw_mci_k3_match[] = {
> + { .compatible = "hisilicon,hi4511-dw-mshc",
> + .data = &k3_drv_data, },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
> +
> +static int dw_mci_k3_probe(struct platform_device *pdev)
> +{
> + const struct dw_mci_drv_data *drv_data;
> + const struct of_device_id *match;
> +
> + match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
> + drv_data = match->data;
> +
> + return dw_mci_pltfm_register(pdev, drv_data);
> +}
> +
> +static int dw_mci_k3_suspend(struct device *dev)
> +{
> + struct dw_mci *host = dev_get_drvdata(dev);
> +
> + if (!IS_ERR(host->ciu_clk))
> + clk_disable_unprepare(host->ciu_clk);
> +
> + return dw_mci_suspend(host);
If k3 needs clk_disable here, dw_mci_suspend()is expected to be called prior to clk_disable_unprepare()?
Of course, it's ok at present though.
Thanks,
Seungwon Jeon
> +}
> +
> +static int dw_mci_k3_resume(struct device *dev)
> +{
> + struct dw_mci *host = dev_get_drvdata(dev);
> + int ret = 0;
> +
> + ret = clk_prepare_enable(host->ciu_clk);
> + if (ret) {
> + dev_err(host->dev, "failed to enable ciu clock\n");
> + return ret;
> + }
> +
> + return dw_mci_resume(host);
> +}
> +
> +SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume);
> +
> +static struct platform_driver dw_mci_k3_pltfm_driver = {
> + .probe = dw_mci_k3_probe,
> + .remove = dw_mci_pltfm_remove,
> + .driver = {
> + .name = "dwmmc_k3",
> + .of_match_table = dw_mci_k3_match,
> + .pm = &dw_mci_k3_pmops,
> + },
> +};
> +
> +module_platform_driver(dw_mci_k3_pltfm_driver);
> +
> +MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:dwmmc-k3");
> --
> 1.7.9.5
>
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