2 * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <linux/err.h>
11 #include <linux/sizes.h>
12 #include <dm/device.h>
13 #include <dm/pinctrl.h>
15 #include "pinctrl-uniphier.h"
17 static const char *uniphier_pinctrl_dummy_name = "_dummy";
19 static int uniphier_pinctrl_get_groups_count(struct udevice *dev)
21 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
23 return priv->socdata->groups_count;
26 static const char *uniphier_pinctrl_get_group_name(struct udevice *dev,
29 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
31 if (!priv->socdata->groups[selector].name)
32 return uniphier_pinctrl_dummy_name;
34 return priv->socdata->groups[selector].name;
37 static int uniphier_pinmux_get_functions_count(struct udevice *dev)
39 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
41 return priv->socdata->functions_count;
44 static const char *uniphier_pinmux_get_function_name(struct udevice *dev,
47 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
49 if (!priv->socdata->functions[selector])
50 return uniphier_pinctrl_dummy_name;
52 return priv->socdata->functions[selector];
55 static void uniphier_pinconf_input_enable_perpin(struct udevice *dev,
58 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
62 reg = UNIPHIER_PINCTRL_IECTRL + pin / 32 * 4;
65 tmp = readl(priv->base + reg);
67 writel(tmp, priv->base + reg);
70 static void uniphier_pinconf_input_enable_legacy(struct udevice *dev,
73 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
74 int pins_count = priv->socdata->pins_count;
75 const struct uniphier_pinctrl_pin *pins = priv->socdata->pins;
78 for (i = 0; i < pins_count; i++) {
79 if (pins[i].number == pin) {
83 iectrl = uniphier_pin_get_iectrl(pins[i].data);
84 tmp = readl(priv->base + UNIPHIER_PINCTRL_IECTRL);
86 writel(tmp, priv->base + UNIPHIER_PINCTRL_IECTRL);
91 static void uniphier_pinconf_input_enable(struct udevice *dev, unsigned pin)
93 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
95 if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL)
96 uniphier_pinconf_input_enable_perpin(dev, pin);
98 uniphier_pinconf_input_enable_legacy(dev, pin);
101 static void uniphier_pinmux_set_one(struct udevice *dev, unsigned pin,
104 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
105 unsigned mux_bits, reg_stride, reg, reg_end, shift, mask;
109 /* some pins need input-enabling */
110 uniphier_pinconf_input_enable(dev, pin);
113 return; /* dedicated pin; nothing to do for pin-mux */
115 if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) {
118 * Normal 4 * n shift+3:shift
119 * Debug 4 * n shift+7:shift+4
127 * Normal 8 * n shift+3:shift
128 * Debug 8 * n + 4 shift+3:shift
132 load_pinctrl = false;
135 reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
136 reg_end = reg + reg_stride;
137 shift = pin * mux_bits % 32;
138 mask = (1U << mux_bits) - 1;
141 * If reg_stride is greater than 4, the MSB of each pinsel shall be
142 * stored in the offset+4.
144 for (; reg < reg_end; reg += 4) {
145 tmp = readl(priv->base + reg);
146 tmp &= ~(mask << shift);
147 tmp |= (mask & muxval) << shift;
148 writel(tmp, priv->base + reg);
154 writel(1, priv->base + UNIPHIER_PINCTRL_LOAD_PINMUX);
157 static int uniphier_pinmux_group_set(struct udevice *dev,
158 unsigned group_selector,
159 unsigned func_selector)
161 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
162 const struct uniphier_pinctrl_group *grp =
163 &priv->socdata->groups[group_selector];
166 for (i = 0; i < grp->num_pins; i++)
167 uniphier_pinmux_set_one(dev, grp->pins[i], grp->muxvals[i]);
172 const struct pinctrl_ops uniphier_pinctrl_ops = {
173 .get_groups_count = uniphier_pinctrl_get_groups_count,
174 .get_group_name = uniphier_pinctrl_get_group_name,
175 .get_functions_count = uniphier_pinmux_get_functions_count,
176 .get_function_name = uniphier_pinmux_get_function_name,
177 .pinmux_group_set = uniphier_pinmux_group_set,
178 .set_state = pinctrl_generic_set_state,
181 int uniphier_pinctrl_probe(struct udevice *dev,
182 struct uniphier_pinctrl_socdata *socdata)
184 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
187 addr = dev_get_addr(dev->parent);
188 if (addr == FDT_ADDR_T_NONE)
191 priv->base = map_sysmem(addr, SZ_4K);
195 priv->socdata = socdata;
200 int uniphier_pinctrl_remove(struct udevice *dev)
202 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
204 unmap_sysmem(priv->base);