[PATCH 2/3] mmc: dw_mmc: add dw_mmc-k3 for k3 platform
Zhangfei Gao
zhangfei.gao at linaro.org
Mon Dec 16 08:12:16 EST 2013
Add dw_mmc-k3.c for k3v2, support sd/emmc
Signed-off-by: Zhangfei Gao <zhangfei.gao at linaro.org>
Signed-off-by: Zhigang Wang <brooke.wangzhigang at huawei.com>
---
.../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 | 134 ++++++++++++++++++++
4 files changed, 205 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 at 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>;
+ };
+
+ /* Board portion */
+ dwmmc0 at 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 at 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..e3eea2883ae7
--- /dev/null
+++ b/drivers/mmc/host/dw_mmc-k3.c
@@ -0,0 +1,134 @@
+/*
+ * 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);
+ int ret = 0;
+
+ ret = dw_mci_suspend(host);
+ if (!ret)
+ clk_disable_unprepare(host->ciu_clk);
+
+ return ret;
+}
+
+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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