1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
8 #include <dm/device-internal.h>
10 #include <dm/pinctrl.h>
11 #include <fdt_support.h>
12 #include <linux/err.h>
14 #include <linux/sizes.h>
17 #include "pinctrl-meson.h"
19 DECLARE_GLOBAL_DATA_PTR;
21 static const char *meson_pinctrl_dummy_name = "_dummy";
23 int meson_pinctrl_get_groups_count(struct udevice *dev)
25 struct meson_pinctrl *priv = dev_get_priv(dev);
27 return priv->data->num_groups;
30 const char *meson_pinctrl_get_group_name(struct udevice *dev,
31 unsigned int selector)
33 struct meson_pinctrl *priv = dev_get_priv(dev);
35 if (!priv->data->groups[selector].name)
36 return meson_pinctrl_dummy_name;
38 return priv->data->groups[selector].name;
41 int meson_pinmux_get_functions_count(struct udevice *dev)
43 struct meson_pinctrl *priv = dev_get_priv(dev);
45 return priv->data->num_funcs;
48 const char *meson_pinmux_get_function_name(struct udevice *dev,
49 unsigned int selector)
51 struct meson_pinctrl *priv = dev_get_priv(dev);
53 return priv->data->funcs[selector].name;
56 static int meson_gpio_calc_reg_and_bit(struct udevice *dev, unsigned int offset,
57 enum meson_reg_type reg_type,
58 unsigned int *reg, unsigned int *bit)
60 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
61 struct meson_bank *bank = NULL;
62 struct meson_reg_desc *desc;
66 pin = priv->data->pin_base + offset;
68 for (i = 0; i < priv->data->num_banks; i++) {
69 if (pin >= priv->data->banks[i].first &&
70 pin <= priv->data->banks[i].last) {
71 bank = &priv->data->banks[i];
79 desc = &bank->regs[reg_type];
81 *bit = desc->bit + pin - bank->first;
86 int meson_gpio_get(struct udevice *dev, unsigned int offset)
88 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
89 unsigned int reg, bit;
92 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_IN, ®, &bit);
96 return !!(readl(priv->reg_gpio + reg) & BIT(bit));
99 int meson_gpio_set(struct udevice *dev, unsigned int offset, int value)
101 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
102 unsigned int reg, bit;
105 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_OUT, ®, &bit);
109 clrsetbits_le32(priv->reg_gpio + reg, BIT(bit), value ? BIT(bit) : 0);
114 int meson_gpio_get_direction(struct udevice *dev, unsigned int offset)
116 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
117 unsigned int reg, bit, val;
120 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_DIR, ®, &bit);
124 val = readl(priv->reg_gpio + reg);
126 return (val & BIT(bit)) ? GPIOF_INPUT : GPIOF_OUTPUT;
129 int meson_gpio_direction_input(struct udevice *dev, unsigned int offset)
131 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
132 unsigned int reg, bit;
135 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_DIR, ®, &bit);
139 clrsetbits_le32(priv->reg_gpio + reg, BIT(bit), 1);
144 int meson_gpio_direction_output(struct udevice *dev,
145 unsigned int offset, int value)
147 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
148 unsigned int reg, bit;
151 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_DIR, ®, &bit);
155 clrsetbits_le32(priv->reg_gpio + reg, BIT(bit), 0);
157 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_OUT, ®, &bit);
161 clrsetbits_le32(priv->reg_gpio + reg, BIT(bit), value ? BIT(bit) : 0);
166 int meson_gpio_probe(struct udevice *dev)
168 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
169 struct gpio_dev_priv *uc_priv;
171 uc_priv = dev_get_uclass_priv(dev);
172 uc_priv->bank_name = priv->data->name;
173 uc_priv->gpio_count = priv->data->num_pins;
178 static fdt_addr_t parse_address(int offset, const char *name, int na, int ns)
183 index = fdt_stringlist_search(gd->fdt_blob, offset, "reg-names", name);
185 return FDT_ADDR_T_NONE;
187 reg = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
188 if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns))))
189 return FDT_ADDR_T_NONE;
191 reg += index * (na + ns);
193 return fdt_translate_address((void *)gd->fdt_blob, offset, reg);
196 int meson_pinctrl_probe(struct udevice *dev)
198 struct meson_pinctrl *priv = dev_get_priv(dev);
199 struct uclass_driver *drv;
200 struct udevice *gpio_dev;
202 int node, gpio = -1, len;
206 na = fdt_address_cells(gd->fdt_blob, dev_of_offset(dev->parent));
208 debug("bad #address-cells\n");
212 ns = fdt_size_cells(gd->fdt_blob, dev_of_offset(dev->parent));
214 debug("bad #size-cells\n");
218 fdt_for_each_subnode(node, gd->fdt_blob, dev_of_offset(dev)) {
219 if (fdt_getprop(gd->fdt_blob, node, "gpio-controller", &len)) {
226 debug("gpio node not found\n");
230 addr = parse_address(gpio, "mux", na, ns);
231 if (addr == FDT_ADDR_T_NONE) {
232 debug("mux address not found\n");
235 priv->reg_mux = (void __iomem *)addr;
237 addr = parse_address(gpio, "gpio", na, ns);
238 if (addr == FDT_ADDR_T_NONE) {
239 debug("gpio address not found\n");
242 priv->reg_gpio = (void __iomem *)addr;
243 priv->data = (struct meson_pinctrl_data *)dev_get_driver_data(dev);
245 /* Lookup GPIO driver */
246 drv = lists_uclass_lookup(UCLASS_GPIO);
248 puts("Cannot find GPIO driver\n");
252 name = calloc(1, 32);
253 sprintf(name, "meson-gpio");
255 /* Create child device UCLASS_GPIO and bind it */
256 device_bind(dev, priv->data->gpio_driver, name, NULL, gpio, &gpio_dev);
257 dev_set_of_offset(gpio_dev, gpio);