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/sizes.h>
13 #include <dm/pinctrl.h>
15 #include "pinctrl-uniphier.h"
17 #define UNIPHIER_PINCTRL_PINMUX_BASE 0x1000
18 #define UNIPHIER_PINCTRL_LOAD_PINMUX 0x1700
19 #define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0x1a00
20 #define UNIPHIER_PINCTRL_IECTRL 0x1d00
22 static const char *uniphier_pinctrl_dummy_name = "_dummy";
24 static int uniphier_pinctrl_get_groups_count(struct udevice *dev)
26 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
28 return priv->socdata->groups_count;
31 static const char *uniphier_pinctrl_get_group_name(struct udevice *dev,
34 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
36 if (!priv->socdata->groups[selector].name)
37 return uniphier_pinctrl_dummy_name;
39 return priv->socdata->groups[selector].name;
42 static int uniphier_pinmux_get_functions_count(struct udevice *dev)
44 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
46 return priv->socdata->functions_count;
49 static const char *uniphier_pinmux_get_function_name(struct udevice *dev,
52 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
54 if (!priv->socdata->functions[selector])
55 return uniphier_pinctrl_dummy_name;
57 return priv->socdata->functions[selector];
60 static int uniphier_pinconf_input_enable_perpin(struct udevice *dev,
61 unsigned int pin, int enable)
63 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
67 reg = UNIPHIER_PINCTRL_IECTRL + pin / 32 * 4;
70 tmp = readl(priv->base + reg);
75 writel(tmp, priv->base + reg);
80 static int uniphier_pinconf_input_enable_legacy(struct udevice *dev,
81 unsigned int pin, int enable)
83 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
84 int pins_count = priv->socdata->pins_count;
85 const struct uniphier_pinctrl_pin *pins = priv->socdata->pins;
89 * Multiple pins share one input enable, per-pin disabling is
95 for (i = 0; i < pins_count; i++) {
96 if (pins[i].number == pin) {
100 iectrl = uniphier_pin_get_iectrl(pins[i].data);
101 tmp = readl(priv->base + UNIPHIER_PINCTRL_IECTRL);
103 writel(tmp, priv->base + UNIPHIER_PINCTRL_IECTRL);
110 static int uniphier_pinconf_input_enable(struct udevice *dev,
111 unsigned int pin, int enable)
113 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
115 if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PERPIN_IECTRL)
116 return uniphier_pinconf_input_enable_perpin(dev, pin, enable);
118 return uniphier_pinconf_input_enable_legacy(dev, pin, enable);
121 #if CONFIG_IS_ENABLED(PINCONF)
123 static const struct pinconf_param uniphier_pinconf_params[] = {
124 { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
125 { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
126 { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
127 { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
128 { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
129 { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
132 static int uniphier_pinconf_bias_set(struct udevice *dev, unsigned int pin,
133 unsigned int param, unsigned int arg)
135 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
136 unsigned int enable = 1;
140 if (!(priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_PUPD_SIMPLE))
144 case PIN_CONFIG_BIAS_DISABLE:
147 case PIN_CONFIG_BIAS_PULL_UP:
148 case PIN_CONFIG_BIAS_PULL_DOWN:
149 if (arg == 0) /* total bias is not supported */
152 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
153 if (arg == 0) /* configuration ignored */
159 reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pin / 32 * 4;
160 mask = BIT(pin % 32);
162 tmp = readl(priv->base + reg);
167 writel(tmp, priv->base + reg);
172 static int uniphier_pinconf_set_one(struct udevice *dev, unsigned int pin,
173 unsigned int param, unsigned int arg)
178 case PIN_CONFIG_BIAS_DISABLE:
179 case PIN_CONFIG_BIAS_PULL_UP:
180 case PIN_CONFIG_BIAS_PULL_DOWN:
181 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
182 ret = uniphier_pinconf_bias_set(dev, pin, param, arg);
184 case PIN_CONFIG_INPUT_ENABLE:
185 ret = uniphier_pinconf_input_enable(dev, pin, arg);
188 printf("unsupported configuration parameter %u\n", param);
195 static int uniphier_pinconf_group_set(struct udevice *dev,
196 unsigned int group_selector,
197 unsigned int param, unsigned int arg)
199 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
200 const struct uniphier_pinctrl_group *grp =
201 &priv->socdata->groups[group_selector];
204 for (i = 0; i < grp->num_pins; i++) {
205 ret = uniphier_pinconf_set_one(dev, grp->pins[i], param, arg);
213 #endif /* CONFIG_IS_ENABLED(PINCONF) */
215 static void uniphier_pinmux_set_one(struct udevice *dev, unsigned pin,
218 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
219 unsigned reg, reg_end, shift, mask;
220 unsigned mux_bits = 8;
221 unsigned reg_stride = 4;
222 bool load_pinctrl = false;
225 /* some pins need input-enabling */
226 uniphier_pinconf_input_enable(dev, pin, 1);
229 return; /* dedicated pin; nothing to do for pin-mux */
231 if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_MUX_4BIT)
234 if (priv->socdata->caps & UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE) {
237 * Normal 4 * n shift+3:shift
238 * Debug 4 * n shift+7:shift+4
245 reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
246 reg_end = reg + reg_stride;
247 shift = pin * mux_bits % 32;
248 mask = (1U << mux_bits) - 1;
251 * If reg_stride is greater than 4, the MSB of each pinsel shall be
252 * stored in the offset+4.
254 for (; reg < reg_end; reg += 4) {
255 tmp = readl(priv->base + reg);
256 tmp &= ~(mask << shift);
257 tmp |= (mask & muxval) << shift;
258 writel(tmp, priv->base + reg);
264 writel(1, priv->base + UNIPHIER_PINCTRL_LOAD_PINMUX);
267 static int uniphier_pinmux_group_set(struct udevice *dev,
268 unsigned group_selector,
269 unsigned func_selector)
271 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
272 const struct uniphier_pinctrl_group *grp =
273 &priv->socdata->groups[group_selector];
276 for (i = 0; i < grp->num_pins; i++)
277 uniphier_pinmux_set_one(dev, grp->pins[i], grp->muxvals[i]);
282 const struct pinctrl_ops uniphier_pinctrl_ops = {
283 .get_groups_count = uniphier_pinctrl_get_groups_count,
284 .get_group_name = uniphier_pinctrl_get_group_name,
285 .get_functions_count = uniphier_pinmux_get_functions_count,
286 .get_function_name = uniphier_pinmux_get_function_name,
287 .pinmux_group_set = uniphier_pinmux_group_set,
288 #if CONFIG_IS_ENABLED(PINCONF)
289 .pinconf_num_params = ARRAY_SIZE(uniphier_pinconf_params),
290 .pinconf_params = uniphier_pinconf_params,
291 .pinconf_group_set = uniphier_pinconf_group_set,
293 .set_state = pinctrl_generic_set_state,
296 int uniphier_pinctrl_probe(struct udevice *dev,
297 struct uniphier_pinctrl_socdata *socdata)
299 struct uniphier_pinctrl_priv *priv = dev_get_priv(dev);
302 addr = dev_get_addr(dev->parent);
303 if (addr == FDT_ADDR_T_NONE)
306 priv->base = devm_ioremap(dev, addr, SZ_4K);
310 priv->socdata = socdata;