/*
- * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ * Copyright (C) 2015-2016 Socionext Inc.
+ * Author: 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 <linux/sizes.h>
#include <dm/device.h>
#include <dm/pinctrl.h>
#include "pinctrl-uniphier.h"
-DECLARE_GLOBAL_DATA_PTR;
+#define UNIPHIER_PINCTRL_PINMUX_BASE 0x1000
+#define UNIPHIER_PINCTRL_LOAD_PINMUX 0x1700
+#define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0x1a00
+#define UNIPHIER_PINCTRL_IECTRL 0x1d00
+
+static const char *uniphier_pinctrl_dummy_name = "_dummy";
static int uniphier_pinctrl_get_groups_count(struct udevice *dev)
{
{
struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+ if (!priv->socdata->groups[selector].name)
+ return uniphier_pinctrl_dummy_name;
+
return priv->socdata->groups[selector].name;
}
{
struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+ if (!priv->socdata->functions[selector])
+ return uniphier_pinctrl_dummy_name;
+
return priv->socdata->functions[selector];
}
-static void uniphier_pinconf_input_enable(struct udevice *dev, unsigned pin)
+static int uniphier_pinconf_input_enable_perpin(struct udevice *dev,
+ unsigned int pin, int enable)
+{
+ struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+ unsigned reg;
+ u32 mask, tmp;
+
+ reg = UNIPHIER_PINCTRL_IECTRL + pin / 32 * 4;
+ mask = BIT(pin % 32);
+
+ tmp = readl(priv->base + reg);
+ if (enable)
+ tmp |= mask;
+ else
+ tmp &= ~mask;
+ writel(tmp, priv->base + reg);
+
+ return 0;
+}
+
+static int uniphier_pinconf_input_enable_legacy(struct udevice *dev,
+ unsigned int pin, int enable)
{
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;
+ /*
+ * Multiple pins share one input enable, per-pin disabling is
+ * impossible.
+ */
+ if (!enable)
+ return -EINVAL;
+
for (i = 0; i < pins_count; i++) {
if (pins[i].number == pin) {
unsigned int iectrl;
writel(tmp, priv->base + UNIPHIER_PINCTRL_IECTRL);
}
}
+
+ return 0;
+}
+
+static int uniphier_pinconf_input_enable(struct udevice *dev,
+ unsigned int pin, int enable)
+{
+ struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+
+ if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL)
+ return uniphier_pinconf_input_enable_perpin(dev, pin, enable);
+ else
+ return uniphier_pinconf_input_enable_legacy(dev, pin, enable);
}
+#if CONFIG_IS_ENABLED(PINCONF)
+
+static const struct pinconf_param uniphier_pinconf_params[] = {
+ { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
+ { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
+ { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
+ { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
+ { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
+ { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
+};
+
+static int uniphier_pinconf_bias_set(struct udevice *dev, unsigned int pin,
+ unsigned int param, unsigned int arg)
+{
+ struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+ unsigned int enable = 1;
+ unsigned int reg;
+ u32 mask, tmp;
+
+ if (!(priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PUPD_SIMPLE))
+ return -ENOTSUPP;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ enable = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0) /* total bias is not supported */
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+ if (arg == 0) /* configuration ignored */
+ return 0;
+ default:
+ BUG();
+ }
+
+ reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pin / 32 * 4;
+ mask = BIT(pin % 32);
+
+ tmp = readl(priv->base + reg);
+ if (enable)
+ tmp |= mask;
+ else
+ tmp &= ~mask;
+ writel(tmp, priv->base + reg);
+
+ return 0;
+}
+
+static int uniphier_pinconf_set_one(struct udevice *dev, unsigned int pin,
+ unsigned int param, unsigned int arg)
+{
+ int ret;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+ ret = uniphier_pinconf_bias_set(dev, pin, param, arg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ ret = uniphier_pinconf_input_enable(dev, pin, arg);
+ break;
+ default:
+ printf("unsupported configuration parameter %u\n", param);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int uniphier_pinconf_group_set(struct udevice *dev,
+ unsigned int group_selector,
+ unsigned int param, unsigned int arg)
+{
+ struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
+ const struct uniphier_pinctrl_group *grp =
+ &priv->socdata->groups[group_selector];
+ int i, ret;
+
+ for (i = 0; i < grp->num_pins; i++) {
+ ret = uniphier_pinconf_set_one(dev, grp->pins[i], param, arg);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+#endif /* CONFIG_IS_ENABLED(PINCONF) */
+
static void uniphier_pinmux_set_one(struct udevice *dev, unsigned pin,
- unsigned muxval)
+ int 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;
+ unsigned mux_bits = 8;
+ unsigned reg_stride = 4;
+ bool load_pinctrl = false;
u32 tmp;
/* some pins need input-enabling */
- uniphier_pinconf_input_enable(dev, pin);
+ uniphier_pinconf_input_enable(dev, pin, 1);
+
+ if (muxval < 0)
+ return; /* dedicated pin; nothing to do for pin-mux */
+
+ if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_MUX_4BIT)
+ mux_bits = 4;
+
+ if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) {
+ /*
+ * Mode offset bit
+ * Normal 4 * n shift+3:shift
+ * Debug 4 * n shift+7:shift+4
+ */
+ mux_bits /= 2;
+ reg_stride = 8;
+ load_pinctrl = true;
+ }
reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
reg_end = reg + reg_stride;
muxval >>= mux_bits;
}
- if (priv->socdata->load_pinctrl)
+ if (load_pinctrl)
writel(1, priv->base + UNIPHIER_PINCTRL_LOAD_PINMUX);
}
.get_functions_count = uniphier_pinmux_get_functions_count,
.get_function_name = uniphier_pinmux_get_function_name,
.pinmux_group_set = uniphier_pinmux_group_set,
+#if CONFIG_IS_ENABLED(PINCONF)
+ .pinconf_num_params = ARRAY_SIZE(uniphier_pinconf_params),
+ .pinconf_params = uniphier_pinconf_params,
+ .pinconf_group_set = uniphier_pinconf_group_set,
+#endif
.set_state = pinctrl_generic_set_state,
};
{
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);
+ addr = dev_get_addr(dev->parent);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
- priv->base = map_sysmem(addr, size);
+ priv->base = devm_ioremap(dev, addr, SZ_4K);
if (!priv->base)
return -ENOMEM;
return 0;
}
-
-int uniphier_pinctrl_remove(struct udevice *dev)
-{
- struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
-
- unmap_sysmem(priv->base);
-
- return 0;
-}
projects / people / ms / u-boot.git / blobdiff