3 * Mario Six, Guntermann & Drunck GmbH, six@gdsys.de
5 * based on arch/powerpc/include/asm/mpc85xx_gpio.h, which is
7 * Copyright 2010 eXMeritus, A Boeing Company
9 * SPDX-License-Identifier: GPL-2.0+
17 DECLARE_GLOBAL_DATA_PTR;
28 struct mpc85xx_gpio_data {
29 /* The bank's register base in memory */
30 struct ccsr_gpio __iomem *base;
31 /* The address of the registers; used to identify the bank */
33 /* The GPIO count of the bank */
35 /* The GPDAT register cannot be used to determine the value of output
36 * pins on MPC8572/MPC8536, so we shadow it and use the shadowed value
41 inline u32 gpio_mask(unsigned gpio) {
42 return (1U << (31 - (gpio)));
45 static inline u32 mpc85xx_gpio_get_val(struct ccsr_gpio *base, u32 mask)
47 return in_be32(&base->gpdat) & mask;
50 static inline u32 mpc85xx_gpio_get_dir(struct ccsr_gpio *base, u32 mask)
52 return in_be32(&base->gpdir) & mask;
55 static inline void mpc85xx_gpio_set_in(struct ccsr_gpio *base, u32 gpios)
57 clrbits_be32(&base->gpdat, gpios);
58 /* GPDIR register 0 -> input */
59 clrbits_be32(&base->gpdir, gpios);
62 static inline void mpc85xx_gpio_set_low(struct ccsr_gpio *base, u32 gpios)
64 clrbits_be32(&base->gpdat, gpios);
65 /* GPDIR register 1 -> output */
66 setbits_be32(&base->gpdir, gpios);
69 static inline void mpc85xx_gpio_set_high(struct ccsr_gpio *base, u32 gpios)
71 setbits_be32(&base->gpdat, gpios);
72 /* GPDIR register 1 -> output */
73 setbits_be32(&base->gpdir, gpios);
76 static inline int mpc85xx_gpio_open_drain_val(struct ccsr_gpio *base, u32 mask)
78 return in_be32(&base->gpodr) & mask;
81 static inline void mpc85xx_gpio_open_drain_on(struct ccsr_gpio *base, u32
84 /* GPODR register 1 -> open drain on */
85 setbits_be32(&base->gpodr, gpios);
88 static inline void mpc85xx_gpio_open_drain_off(struct ccsr_gpio *base,
91 /* GPODR register 0 -> open drain off (actively driven) */
92 clrbits_be32(&base->gpodr, gpios);
95 static int mpc85xx_gpio_direction_input(struct udevice *dev, unsigned gpio)
97 struct mpc85xx_gpio_data *data = dev_get_priv(dev);
99 mpc85xx_gpio_set_in(data->base, gpio_mask(gpio));
103 static int mpc85xx_gpio_set_value(struct udevice *dev, unsigned gpio,
106 struct mpc85xx_gpio_data *data = dev_get_priv(dev);
109 data->dat_shadow |= gpio_mask(gpio);
110 mpc85xx_gpio_set_high(data->base, gpio_mask(gpio));
112 data->dat_shadow &= ~gpio_mask(gpio);
113 mpc85xx_gpio_set_low(data->base, gpio_mask(gpio));
118 static int mpc85xx_gpio_direction_output(struct udevice *dev, unsigned gpio,
121 return mpc85xx_gpio_set_value(dev, gpio, value);
124 static int mpc85xx_gpio_get_value(struct udevice *dev, unsigned gpio)
126 struct mpc85xx_gpio_data *data = dev_get_priv(dev);
128 if (!!mpc85xx_gpio_get_dir(data->base, gpio_mask(gpio))) {
129 /* Output -> use shadowed value */
130 return !!(data->dat_shadow & gpio_mask(gpio));
132 /* Input -> read value from GPDAT register */
133 return !!mpc85xx_gpio_get_val(data->base, gpio_mask(gpio));
137 static int mpc85xx_gpio_get_open_drain(struct udevice *dev, unsigned gpio)
139 struct mpc85xx_gpio_data *data = dev_get_priv(dev);
141 return !!mpc85xx_gpio_open_drain_val(data->base, gpio_mask(gpio));
144 static int mpc85xx_gpio_set_open_drain(struct udevice *dev, unsigned gpio,
147 struct mpc85xx_gpio_data *data = dev_get_priv(dev);
150 mpc85xx_gpio_open_drain_on(data->base, gpio_mask(gpio));
152 mpc85xx_gpio_open_drain_off(data->base, gpio_mask(gpio));
157 static int mpc85xx_gpio_get_function(struct udevice *dev, unsigned gpio)
159 struct mpc85xx_gpio_data *data = dev_get_priv(dev);
162 dir = !!mpc85xx_gpio_get_dir(data->base, gpio_mask(gpio));
163 return dir ? GPIOF_OUTPUT : GPIOF_INPUT;
166 #if CONFIG_IS_ENABLED(OF_CONTROL)
167 static int mpc85xx_gpio_ofdata_to_platdata(struct udevice *dev) {
168 struct mpc85xx_gpio_plat *plat = dev_get_platdata(dev);
172 addr = fdtdec_get_addr_size_auto_noparent(gd->fdt_blob, dev->of_offset,
173 "reg", 0, &size, false);
177 plat->ngpios = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
184 static int mpc85xx_gpio_platdata_to_priv(struct udevice *dev)
186 struct mpc85xx_gpio_data *priv = dev_get_priv(dev);
187 struct mpc85xx_gpio_plat *plat = dev_get_platdata(dev);
188 unsigned long size = plat->size;
193 priv->addr = plat->addr;
194 priv->base = map_sysmem(CONFIG_SYS_IMMR + plat->addr, size);
199 priv->gpio_count = plat->ngpios;
200 priv->dat_shadow = 0;
205 static int mpc85xx_gpio_probe(struct udevice *dev)
207 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
208 struct mpc85xx_gpio_data *data = dev_get_priv(dev);
211 mpc85xx_gpio_platdata_to_priv(dev);
213 snprintf(name, sizeof(name), "MPC@%lx_", data->addr);
219 uc_priv->bank_name = str;
220 uc_priv->gpio_count = data->gpio_count;
225 static const struct dm_gpio_ops gpio_mpc85xx_ops = {
226 .direction_input = mpc85xx_gpio_direction_input,
227 .direction_output = mpc85xx_gpio_direction_output,
228 .get_value = mpc85xx_gpio_get_value,
229 .set_value = mpc85xx_gpio_set_value,
230 .get_open_drain = mpc85xx_gpio_get_open_drain,
231 .set_open_drain = mpc85xx_gpio_set_open_drain,
232 .get_function = mpc85xx_gpio_get_function,
235 static const struct udevice_id mpc85xx_gpio_ids[] = {
236 { .compatible = "fsl,pq3-gpio" },
240 U_BOOT_DRIVER(gpio_mpc85xx) = {
241 .name = "gpio_mpc85xx",
243 .ops = &gpio_mpc85xx_ops,
244 #if CONFIG_IS_ENABLED(OF_CONTROL)
245 .ofdata_to_platdata = mpc85xx_gpio_ofdata_to_platdata,
246 .platdata_auto_alloc_size = sizeof(struct mpc85xx_gpio_plat),
247 .of_match = mpc85xx_gpio_ids,
249 .probe = mpc85xx_gpio_probe,
250 .priv_auto_alloc_size = sizeof(struct mpc85xx_gpio_data),