Commit 5dc626f8 authored by Masahiro Yamada's avatar Masahiro Yamada

pinctrl: uniphier: add UniPhier pinctrl core support

The core support for the pinctrl drivers for all the UniPhier SoCs.
Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: default avatarSimon Glass <sjg@chromium.org>
parent 8a5f6129
......@@ -124,4 +124,6 @@ config PINCTRL_SANDBOX
endif
source "drivers/pinctrl/uniphier/Kconfig"
endmenu
......@@ -3,3 +3,5 @@ obj-$(CONFIG_$(SPL_)PINCTRL_GENERIC) += pinctrl-generic.o
obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/
obj-$(CONFIG_PINCTRL_SANDBOX) += pinctrl-sandbox.o
obj-$(CONFIG_ARCH_UNIPHIER) += uniphier/
if ARCH_UNIPHIER
config PINCTRL_UNIPHIER_CORE
bool
endif
obj-$(CONFIG_PINCTRL_UNIPHIER_CORE) += pinctrl-uniphier-core.o
/*
* Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@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_pinconf_input_enable(struct udevice *dev, unsigned pin)
{
struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
int pins_count = priv->socdata->pins_count;
const struct uniphier_pinctrl_pin *pins = priv->socdata->pins;
int i;
for (i = 0; i < pins_count; i++) {
if (pins[i].number == pin) {
unsigned int iectrl;
u32 tmp;
iectrl = uniphier_pin_get_iectrl(pins[i].data);
tmp = readl(priv->base + UNIPHIER_PINCTRL_IECTRL);
tmp |= 1 << iectrl;
writel(tmp, priv->base + UNIPHIER_PINCTRL_IECTRL);
}
}
}
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);
/* some pins need input-enabling */
uniphier_pinconf_input_enable(dev, pin);
}
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 *grp =
&priv->socdata->groups[group_selector];
int i;
for (i = 0; i < grp->num_pins; i++)
uniphier_pinmux_set_one(dev, grp->pins[i], grp->muxvals[i]);
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;
}
/*
* Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __PINCTRL_UNIPHIER_H__
#define __PINCTRL_UNIPHIER_H__
/* TODO: move this to include/linux/bug.h */
#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
#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
#define UNIPHIER_PIN_ATTR_PACKED(iectrl) (iectrl)
static inline unsigned int uniphier_pin_get_iectrl(unsigned long data)
{
return data;
}
/**
* struct uniphier_pinctrl_pin - pin data for UniPhier SoC
*
* @number: pin number
* @data: additional per-pin data
*/
struct uniphier_pinctrl_pin {
unsigned number;
unsigned long data;
};
/**
* struct uniphier_pinctrl_group - pin group data for UniPhier SoC
*
* @name: pin group name
* @pins: array of pins that belong to the group
* @num_pins: number of pins in the group
* @muxvals: array of values to be set to pinmux registers
*/
struct uniphier_pinctrl_group {
const char *name;
const unsigned *pins;
unsigned num_pins;
const unsigned *muxvals;
};
/**
* struct uniphier_pinctrl_socdata - SoC data for UniPhier pin controller
*
* @pins: array of pin data
* @pins_count: number of pin data
* @groups: array of pin group data
* @groups_count: number of pin group data
* @functions: array of pinmux function names
* @functions_count: number of pinmux functions
* @mux_bits: bit width of each pinmux register
* @reg_stride: stride of pinmux register address
* @load_pinctrl: if true, LOAD_PINMUX register must be set to one for new
* values in pinmux registers to become really effective
*/
struct uniphier_pinctrl_socdata {
const struct uniphier_pinctrl_pin *pins;
int pins_count;
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_PIN(a, b) \
{ \
.number = a, \
.data = UNIPHIER_PIN_ATTR_PACKED(b), \
}
#define UNIPHIER_PINCTRL_GROUP(grp) \
{ \
.name = #grp, \
.pins = grp##_pins, \
.num_pins = ARRAY_SIZE(grp##_pins), \
.muxvals = grp##_muxvals + \
BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) != \
ARRAY_SIZE(grp##_muxvals)), \
}
/**
* struct uniphier_pinctrl_priv - private data for UniPhier pinctrl driver
*
* @base: base address of the pinctrl device
* @socdata: SoC specific data
*/
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__ */
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