2 * Copyright (C) 2015-2016 Socionext Inc.
3 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <linux/err.h>
12 #include <linux/kernel.h>
13 #include <linux/sizes.h>
14 #include <dm/pinctrl.h>
16 #include "pinctrl-uniphier.h"
18 #define UNIPHIER_PINCTRL_PINMUX_BASE 0x1000
19 #define UNIPHIER_PINCTRL_LOAD_PINMUX 0x1700
20 #define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0x1a00
21 #define UNIPHIER_PINCTRL_IECTRL 0x1d00
23 static const char *uniphier_pinctrl_dummy_name = "_dummy";
25 static int uniphier_pinctrl_get_groups_count(struct udevice *dev)
27 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
29 return priv->socdata->groups_count;
32 static const char *uniphier_pinctrl_get_group_name(struct udevice *dev,
35 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
37 if (!priv->socdata->groups[selector].name)
38 return uniphier_pinctrl_dummy_name;
40 return priv->socdata->groups[selector].name;
43 static int uniphier_pinmux_get_functions_count(struct udevice *dev)
45 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
47 return priv->socdata->functions_count;
50 static const char *uniphier_pinmux_get_function_name(struct udevice *dev,
53 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
55 if (!priv->socdata->functions[selector])
56 return uniphier_pinctrl_dummy_name;
58 return priv->socdata->functions[selector];
61 static int uniphier_pinconf_input_enable_perpin(struct udevice *dev,
62 unsigned int pin, int enable)
64 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
68 reg = UNIPHIER_PINCTRL_IECTRL + pin / 32 * 4;
71 tmp = readl(priv->base + reg);
76 writel(tmp, priv->base + reg);
81 static int uniphier_pinconf_input_enable_legacy(struct udevice *dev,
82 unsigned int pin, int enable)
84 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
87 * Multiple pins share one input enable, per-pin disabling is
93 /* Set all bits instead of having a bunch of pin data */
94 writel(U32_MAX, priv->base + UNIPHIER_PINCTRL_IECTRL);
99 static int uniphier_pinconf_input_enable(struct udevice *dev,
100 unsigned int pin, int enable)
102 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
104 if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL)
105 return uniphier_pinconf_input_enable_perpin(dev, pin, enable);
107 return uniphier_pinconf_input_enable_legacy(dev, pin, enable);
110 #if CONFIG_IS_ENABLED(PINCONF)
112 static const struct pinconf_param uniphier_pinconf_params[] = {
113 { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
114 { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
115 { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
116 { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
117 { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
118 { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
121 static int uniphier_pinconf_bias_set(struct udevice *dev, unsigned int pin,
122 unsigned int param, unsigned int arg)
124 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
125 unsigned int enable = 1;
129 if (!(priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PUPD_SIMPLE))
133 case PIN_CONFIG_BIAS_DISABLE:
136 case PIN_CONFIG_BIAS_PULL_UP:
137 case PIN_CONFIG_BIAS_PULL_DOWN:
138 if (arg == 0) /* total bias is not supported */
141 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
142 if (arg == 0) /* configuration ignored */
148 reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pin / 32 * 4;
149 mask = BIT(pin % 32);
151 tmp = readl(priv->base + reg);
156 writel(tmp, priv->base + reg);
161 static int uniphier_pinconf_set_one(struct udevice *dev, unsigned int pin,
162 unsigned int param, unsigned int arg)
167 case PIN_CONFIG_BIAS_DISABLE:
168 case PIN_CONFIG_BIAS_PULL_UP:
169 case PIN_CONFIG_BIAS_PULL_DOWN:
170 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
171 ret = uniphier_pinconf_bias_set(dev, pin, param, arg);
173 case PIN_CONFIG_INPUT_ENABLE:
174 ret = uniphier_pinconf_input_enable(dev, pin, arg);
177 printf("unsupported configuration parameter %u\n", param);
184 static int uniphier_pinconf_group_set(struct udevice *dev,
185 unsigned int group_selector,
186 unsigned int param, unsigned int arg)
188 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
189 const struct uniphier_pinctrl_group *grp =
190 &priv->socdata->groups[group_selector];
193 for (i = 0; i < grp->num_pins; i++) {
194 ret = uniphier_pinconf_set_one(dev, grp->pins[i], param, arg);
202 #endif /* CONFIG_IS_ENABLED(PINCONF) */
204 static void uniphier_pinmux_set_one(struct udevice *dev, unsigned pin,
207 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
208 unsigned reg, reg_end, shift, mask;
209 unsigned mux_bits = 8;
210 unsigned reg_stride = 4;
211 bool load_pinctrl = false;
214 /* some pins need input-enabling */
215 uniphier_pinconf_input_enable(dev, pin, 1);
218 return; /* dedicated pin; nothing to do for pin-mux */
220 if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_MUX_4BIT)
223 if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) {
226 * Normal 4 * n shift+3:shift
227 * Debug 4 * n shift+7:shift+4
234 reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
235 reg_end = reg + reg_stride;
236 shift = pin * mux_bits % 32;
237 mask = (1U << mux_bits) - 1;
240 * If reg_stride is greater than 4, the MSB of each pinsel shall be
241 * stored in the offset+4.
243 for (; reg < reg_end; reg += 4) {
244 tmp = readl(priv->base + reg);
245 tmp &= ~(mask << shift);
246 tmp |= (mask & muxval) << shift;
247 writel(tmp, priv->base + reg);
253 writel(1, priv->base + UNIPHIER_PINCTRL_LOAD_PINMUX);
256 static int uniphier_pinmux_group_set(struct udevice *dev,
257 unsigned group_selector,
258 unsigned func_selector)
260 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
261 const struct uniphier_pinctrl_group *grp =
262 &priv->socdata->groups[group_selector];
265 for (i = 0; i < grp->num_pins; i++)
266 uniphier_pinmux_set_one(dev, grp->pins[i], grp->muxvals[i]);
271 const struct pinctrl_ops uniphier_pinctrl_ops = {
272 .get_groups_count = uniphier_pinctrl_get_groups_count,
273 .get_group_name = uniphier_pinctrl_get_group_name,
274 .get_functions_count = uniphier_pinmux_get_functions_count,
275 .get_function_name = uniphier_pinmux_get_function_name,
276 .pinmux_group_set = uniphier_pinmux_group_set,
277 #if CONFIG_IS_ENABLED(PINCONF)
278 .pinconf_num_params = ARRAY_SIZE(uniphier_pinconf_params),
279 .pinconf_params = uniphier_pinconf_params,
280 .pinconf_group_set = uniphier_pinconf_group_set,
282 .set_state = pinctrl_generic_set_state,
285 int uniphier_pinctrl_probe(struct udevice *dev,
286 struct uniphier_pinctrl_socdata *socdata)
288 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
291 addr = devfdt_get_addr(dev->parent);
292 if (addr == FDT_ADDR_T_NONE)
295 priv->base = devm_ioremap(dev, addr, SZ_4K);
299 priv->socdata = socdata;