[PATCH] mmc: dw_mmc: move rockchip related code to a separate file
From: Addy Ke
Date: Thu Aug 14 2014 - 04:04:34 EST
To support HS200 and UHS-1, we need add a big hunk of code,
as shown in the following patches. So a separate file for
rockchip SOCs is suitable.
Signed-off-by: Addy Ke <addy.ke@xxxxxxxxxxxxxx>
---
drivers/mmc/host/Kconfig | 9 +++
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/dw_mmc-pltfm.c | 57 ---------------
drivers/mmc/host/dw_mmc-rockchip.c | 146 +++++++++++++++++++++++++++++++++++++
4 files changed, 156 insertions(+), 57 deletions(-)
create mode 100644 drivers/mmc/host/dw_mmc-rockchip.c
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index a565254..ae61df6 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -621,6 +621,15 @@ config MMC_DW_PCI
If unsure, say N.
+config MMC_DW_ROCKCHIP
+ tristate "Rockchip specific extensions for Synopsys DW Memory Card Interface"
+ depends on MMC_DW
+ select MMC_DW_PLTFM
+ help
+ This selects support for Rockchip SoC specific extensions to the
+ Synopsys DesignWare Memory Card Interface driver. Select this option
+ for platforms based on RK3066, RK3188 and RK3288 SoC's.
+
config MMC_SH_MMCIF
tristate "SuperH Internal MMCIF support"
depends on MMC_BLOCK
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 7f81ddf..5fce465 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_MMC_DW_PLTFM) += dw_mmc-pltfm.o
obj-$(CONFIG_MMC_DW_EXYNOS) += dw_mmc-exynos.o
obj-$(CONFIG_MMC_DW_K3) += dw_mmc-k3.o
obj-$(CONFIG_MMC_DW_PCI) += dw_mmc-pci.o
+obj-$(CONFIG_MMC_DW_ROCKCHIP) += dw_mmc-rockchip.o
obj-$(CONFIG_MMC_SH_MMCIF) += sh_mmcif.o
obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
obj-$(CONFIG_MMC_VUB300) += vub300.o
diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
index b547f7a..0c56c41 100644
--- a/drivers/mmc/host/dw_mmc-pltfm.c
+++ b/drivers/mmc/host/dw_mmc-pltfm.c
@@ -26,64 +26,11 @@
#include "dw_mmc.h"
#include "dw_mmc-pltfm.h"
-#define RK3288_CLKGEN_DIV 2
-
static void dw_mci_pltfm_prepare_command(struct dw_mci *host, u32 *cmdr)
{
*cmdr |= SDMMC_CMD_USE_HOLD_REG;
}
-static int dw_mci_rk3288_setup_clock(struct dw_mci *host)
-{
- host->bus_hz /= RK3288_CLKGEN_DIV;
-
- return 0;
-}
-
-static void dw_mci_rk3288_set_ios(struct dw_mci *host, struct mmc_ios *ios)
-{
- int ret;
- unsigned int cclkin;
- u32 bus_hz;
-
- /*
- * cclkin: source clock of mmc controller.
- * bus_hz: card interface clock generated by CLKGEN.
- * bus_hz = cclkin / RK3288_CLKGEN_DIV;
- * ios->clock = (div == 0) ? bus_hz : (bus_hz / (2 * div))
- *
- * Note: div can only be 0 or 1
- * if DDR50 8bit mode(only emmc work in 8bit mode),
- * div must be set 1
- */
- if ((ios->bus_width == MMC_BUS_WIDTH_8) &&
- (ios->timing == MMC_TIMING_MMC_DDR52))
- cclkin = 2 * ios->clock * RK3288_CLKGEN_DIV;
- else
- cclkin = ios->clock * RK3288_CLKGEN_DIV;
-
- ret = clk_set_rate(host->ciu_clk, cclkin);
- if (ret)
- dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock);
-
- bus_hz = clk_get_rate(host->ciu_clk) / RK3288_CLKGEN_DIV;
- if (bus_hz != host->bus_hz) {
- host->bus_hz = bus_hz;
- /* force dw_mci_setup_bus() */
- host->current_speed = 0;
- }
-}
-
-static const struct dw_mci_drv_data rk2928_drv_data = {
- .prepare_command = dw_mci_pltfm_prepare_command,
-};
-
-static const struct dw_mci_drv_data rk3288_drv_data = {
- .prepare_command = dw_mci_pltfm_prepare_command,
- .set_ios = dw_mci_rk3288_set_ios,
- .setup_clock = dw_mci_rk3288_setup_clock,
-};
-
static const struct dw_mci_drv_data socfpga_drv_data = {
.prepare_command = dw_mci_pltfm_prepare_command,
};
@@ -144,10 +91,6 @@ EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
static const struct of_device_id dw_mci_pltfm_match[] = {
{ .compatible = "snps,dw-mshc", },
- { .compatible = "rockchip,rk2928-dw-mshc",
- .data = &rk2928_drv_data },
- { .compatible = "rockchip,rk3288-dw-mshc",
- .data = &rk3288_drv_data },
{ .compatible = "altr,socfpga-dw-mshc",
.data = &socfpga_drv_data },
{},
diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
new file mode 100644
index 0000000..3d86ef3
--- /dev/null
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ * Author: addy ke <addy.ke@xxxxxxxxxxxxxx>
+ *
+ * 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 RK3288_CLKGEN_DIV 2
+
+static void dw_mci_rockchip_prepare_command(struct dw_mci *host, u32 *cmdr)
+{
+ *cmdr |= SDMMC_CMD_USE_HOLD_REG;
+}
+
+static int dw_mci_rk3288_setup_clock(struct dw_mci *host)
+{
+ host->bus_hz /= RK3288_CLKGEN_DIV;
+
+ return 0;
+}
+
+static void dw_mci_rk3288_set_ios(struct dw_mci *host, struct mmc_ios *ios)
+{
+ int ret;
+ unsigned int cclkin;
+ u32 bus_hz;
+
+ /*
+ * cclkin: source clock of mmc controller
+ * bus_hz: card interface clock generated by CLKGEN
+ * bus_hz = cclkin / RK3288_CLKGEN_DIV
+ * os->clock = (div == 0) ? bus_hz : (bus_hz / (2 * div))
+ *
+ * Note: div can only be 0 or 1
+ * if DDR50 8bit mode(only emmc work in 8bit mode),
+ * div must be set 1
+ */
+ if (ios->bus_width == MMC_BUS_WIDTH_8 &&
+ ios->timing == MMC_TIMING_MMC_DDR52)
+ cclkin = 2 * ios->clock * RK3288_CLKGEN_DIV;
+ else
+ cclkin = ios->clock * RK3288_CLKGEN_DIV;
+
+ ret = clk_set_rate(host->ciu_clk, cclkin);
+ if (ret)
+ dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock);
+
+ bus_hz = clk_get_rate(host->ciu_clk) / RK3288_CLKGEN_DIV;
+ if (bus_hz != host->bus_hz) {
+ host->bus_hz = bus_hz;
+ /* force dw_mci_setup_bus() */
+ host->current_speed = 0;
+ }
+}
+
+static const struct dw_mci_drv_data rk2928_drv_data = {
+ .prepare_command = dw_mci_rockchip_prepare_command,
+};
+
+static const struct dw_mci_drv_data rk3288_drv_data = {
+ .prepare_command = dw_mci_rockchip_prepare_command,
+ .set_ios = dw_mci_rk3288_set_ios,
+ .setup_clock = dw_mci_rk3288_setup_clock,
+};
+
+static const struct of_device_id dw_mci_rockchip_match[] = {
+ { .compatible = "rockchip,rk2928-dw-mshc",
+ .data = &rk2928_drv_data },
+ { .compatible = "rockchip,rk3288-dw-mshc",
+ .data = &rk3288_drv_data },
+ {},
+};
+MODULE_DEVICE_TABLE(of, dw_mci_rockchip_match);
+
+static int dw_mci_rockchip_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_rockchip_match, pdev->dev.of_node);
+ drv_data = match->data;
+
+ return dw_mci_pltfm_register(pdev, drv_data);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int dw_mci_rockchip_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_rockchip_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);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(dw_mci_rockchip_pmops,
+ dw_mci_rockchip_suspend,
+ dw_mci_rockchip_resume);
+
+static struct platform_driver dw_mci_rockchip_pltfm_driver = {
+ .probe = dw_mci_rockchip_probe,
+ .remove = dw_mci_pltfm_remove,
+ .driver = {
+ .name = "dwmmc_rockchip",
+ .of_match_table = dw_mci_rockchip_match,
+ .pm = &dw_mci_rockchip_pmops,
+ },
+};
+
+module_platform_driver(dw_mci_rockchip_pltfm_driver);
+
+MODULE_AUTHOR("Addy Ke <addy.ke@xxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Rockchip Specific DW-MSHC Driver Extension");
+MODULE_ALIAS("platform:dwmmc-rockchip");
+MODULE_LICENSE("GPL v2");
--
1.8.3.2
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/