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authorZhangfei Gao <zhangfei.gao@linaro.org>2014-01-09 22:35:11 +0800
committerChris Ball <chris@printf.net>2014-01-13 12:48:33 -0500
commit036f29d554e84fa288411d950c2f0ae797be9146 (patch)
tree6ac874f5ae34b97855a2e602275818108169fc9b /drivers/mmc
parentbf626e5550f24aec24975a0e85ad8e572ca76a6b (diff)
mmc: dw_mmc: add dw_mmc-k3 for k3 platform
Add dw_mmc-k3.c for k3v2, support sd/emmc Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Zhigang Wang <brooke.wangzhigang@huawei.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/Kconfig10
-rw-r--r--drivers/mmc/host/Makefile1
-rw-r--r--drivers/mmc/host/dw_mmc-k3.c132
3 files changed, 143 insertions, 0 deletions
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 265ba4800134..6da5a085f5f8 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -576,6 +576,16 @@ 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 5dd3de9b2677..a69fd640698d 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -44,6 +44,7 @@ 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..68e5e428e8f6
--- /dev/null
+++ b/drivers/mmc/host/dw_mmc-k3.c
@@ -0,0 +1,132 @@
+/*
+ * 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;
+
+ if (!rate) {
+ dev_warn(host->dev,
+ "no specified rate in timing %u\n", ios->timing);
+ return;
+ }
+
+ 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 const struct dw_mci_drv_data k3_drv_data = {
+ .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;
+
+ 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;
+
+ 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");