[U-Boot] [PATCH 01/15] pinctrl: uniphier: add UniPhier pinctrl core support

Masahiro Yamada yamada.masahiro at socionext.com
Tue Sep 1 15:50:18 CEST 2015


The core support for the pinctrl drivers for all the UniPhier SoCs.

Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
---

 drivers/pinctrl/Kconfig                          |   2 +
 drivers/pinctrl/Makefile                         |   2 +
 drivers/pinctrl/uniphier/Kconfig                 |   6 +
 drivers/pinctrl/uniphier/Makefile                |   1 +
 drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 134 +++++++++++++++++++++++
 drivers/pinctrl/uniphier/pinctrl-uniphier.h      |  57 ++++++++++
 6 files changed, 202 insertions(+)
 create mode 100644 drivers/pinctrl/uniphier/Kconfig
 create mode 100644 drivers/pinctrl/uniphier/Makefile
 create mode 100644 drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
 create mode 100644 drivers/pinctrl/uniphier/pinctrl-uniphier.h

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 30b8e45..9c12429 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -106,4 +106,6 @@ config PINCTRL_SANDBOX
 
 endif
 
+source "drivers/pinctrl/uniphier/Kconfig"
+
 endmenu
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 35decf4..d0eb263 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -2,3 +2,5 @@ obj-y					+= pinctrl-uclass.o
 obj-$(CONFIG_$(SPL_)PINCTRL_GENERIC)	+= pinctrl-generic.o
 
 obj-$(CONFIG_PINCTRL_SANDBOX)	+= pinctrl-sandbox.o
+
+obj-$(CONFIG_ARCH_UNIPHIER)	+= uniphier/
diff --git a/drivers/pinctrl/uniphier/Kconfig b/drivers/pinctrl/uniphier/Kconfig
new file mode 100644
index 0000000..29a623d
--- /dev/null
+++ b/drivers/pinctrl/uniphier/Kconfig
@@ -0,0 +1,6 @@
+if ARCH_UNIPHIER
+
+config PINCTRL_UNIPHIER_CORE
+	bool
+
+endif
diff --git a/drivers/pinctrl/uniphier/Makefile b/drivers/pinctrl/uniphier/Makefile
new file mode 100644
index 0000000..748aa1b
--- /dev/null
+++ b/drivers/pinctrl/uniphier/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_PINCTRL_UNIPHIER_CORE)		+= pinctrl-uniphier-core.o
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
new file mode 100644
index 0000000..f008aea
--- /dev/null
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro at socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mapmem.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <dm/device.h>
+#include <dm/pinctrl.h>
+
+#include "pinctrl-uniphier.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int uniphier_pinctrl_get_groups_count(struct udevice *dev)
+{
+	struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+
+	return priv->socdata->groups_count;
+}
+
+static const char *uniphier_pinctrl_get_group_name(struct udevice *dev,
+						   unsigned selector)
+{
+	struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+
+	return priv->socdata->groups[selector].name;
+}
+
+static int uniphier_pinmux_get_functions_count(struct udevice *dev)
+{
+	struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+
+	return priv->socdata->functions_count;
+}
+
+static const char *uniphier_pinmux_get_function_name(struct udevice *dev,
+						     unsigned selector)
+{
+	struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+
+	return priv->socdata->functions[selector];
+}
+
+static void uniphier_pinmux_set_one(struct udevice *dev, unsigned pin,
+				    unsigned muxval)
+{
+	struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+	unsigned mux_bits = priv->socdata->mux_bits;
+	unsigned reg_stride = priv->socdata->reg_stride;
+	unsigned reg, reg_end, shift, mask;
+	u32 tmp;
+
+	reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
+	reg_end = reg + reg_stride;
+	shift = pin * mux_bits % 32;
+	mask = (1U << mux_bits) - 1;
+
+	/*
+	 * If reg_stride is greater than 4, the MSB of each pinsel shall be
+	 * stored in the offset+4.
+	 */
+	for (; reg < reg_end; reg += 4) {
+		tmp = readl(priv->base + reg);
+		tmp &= ~(mask << shift);
+		tmp |= (mask & muxval) << shift;
+		writel(tmp, priv->base + reg);
+
+		muxval >>= mux_bits;
+	}
+
+	if (priv->socdata->load_pinctrl)
+		writel(1, priv->base + UNIPHIER_PINCTRL_LOAD_PINMUX);
+}
+
+static int uniphier_pinmux_group_set(struct udevice *dev,
+				     unsigned group_selector,
+				     unsigned func_selector)
+{
+	struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+	const struct uniphier_pinctrl_group *group =
+					&priv->socdata->groups[group_selector];
+	const struct uniphier_pmx_data *pmx_data = group->pmx_data;
+	const unsigned num_pmx_data = group->num_pmx_data;
+	int i;
+
+	for (i = 0; i < num_pmx_data; i++)
+		uniphier_pinmux_set_one(dev, pmx_data[i].pin,
+					pmx_data[i].muxval);
+
+	return 0;
+}
+
+const struct pinctrl_ops uniphier_pinctrl_ops = {
+	.get_groups_count = uniphier_pinctrl_get_groups_count,
+	.get_group_name = uniphier_pinctrl_get_group_name,
+	.get_functions_count = uniphier_pinmux_get_functions_count,
+	.get_function_name = uniphier_pinmux_get_function_name,
+	.pinmux_group_set = uniphier_pinmux_group_set,
+	.set_state = pinctrl_generic_set_state,
+};
+
+int uniphier_pinctrl_probe(struct udevice *dev,
+			   struct uniphier_pinctrl_socdata *socdata)
+{
+	struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+	fdt_addr_t addr;
+	fdt_size_t size;
+
+	addr = fdtdec_get_addr_size(gd->fdt_blob, dev->of_offset, "reg",
+				    &size);
+	if (addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	priv->base = map_sysmem(addr, size);
+	if (!priv->base)
+		return -ENOMEM;
+
+	priv->socdata = socdata;
+
+	return 0;
+}
+
+int uniphier_pinctrl_remove(struct udevice *dev)
+{
+	struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+
+	unmap_sysmem(priv->base);
+
+	return 0;
+}
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier.h b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
new file mode 100644
index 0000000..db74838
--- /dev/null
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro at socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __PINCTRL_UNIPHIER_H__
+#define __PINCTRL_UNIPHIER_H__
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#define UNIPHIER_PINCTRL_PINMUX_BASE	0x0
+#define UNIPHIER_PINCTRL_LOAD_PINMUX	0x700
+#define UNIPHIER_PINCTRL_IECTRL		0xd00
+
+struct uniphier_pmx_data {
+	unsigned pin;
+	unsigned muxval;
+};
+
+struct uniphier_pinctrl_group {
+	const char *name;
+	const struct uniphier_pmx_data *pmx_data;
+	unsigned num_pmx_data;
+};
+
+struct uniphier_pinctrl_socdata {
+	const struct uniphier_pinctrl_group *groups;
+	int groups_count;
+	const char * const *functions;
+	int functions_count;
+	unsigned mux_bits;
+	unsigned reg_stride;
+	bool load_pinctrl;
+};
+
+#define UNIPHIER_PINCTRL_GROUP(grp)			\
+	{						\
+		.name = #grp,				\
+		.pmx_data = grp##_pmx,			\
+		.num_pmx_data = ARRAY_SIZE(grp##_pmx),	\
+	}
+
+struct uniphier_pinctrl_priv {
+	void __iomem *base;
+	struct uniphier_pinctrl_socdata *socdata;
+};
+
+extern const struct pinctrl_ops uniphier_pinctrl_ops;
+
+int uniphier_pinctrl_probe(struct udevice *dev,
+			   struct uniphier_pinctrl_socdata *socdata);
+
+int uniphier_pinctrl_remove(struct udevice *dev);
+
+#endif /* __PINCTRL_UNIPHIER_H__ */
-- 
1.9.1



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