2 * (C) Copyright 2012 Henrik Nordstrom <henrik@henriknordstrom.net>
4 * Based on earlier arch/arm/cpu/armv7/sunxi/gpio.c:
6 * (C) Copyright 2007-2011
7 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
8 * Tom Cubie <tangliang@allwinnertech.com>
10 * SPDX-License-Identifier: GPL-2.0+
18 #include <asm/arch/gpio.h>
21 #include <dm/device-internal.h>
23 DECLARE_GLOBAL_DATA_PTR;
25 #define SUNXI_GPIOS_PER_BANK SUNXI_GPIO_A_NR
27 struct sunxi_gpio_platdata {
28 struct sunxi_gpio *regs;
29 const char *bank_name; /* Name of bank, e.g. "B" */
33 #ifndef CONFIG_DM_GPIO
34 static int sunxi_gpio_output(u32 pin, u32 val)
37 u32 bank = GPIO_BANK(pin);
38 u32 num = GPIO_NUM(pin);
39 struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
41 dat = readl(&pio->dat);
47 writel(dat, &pio->dat);
52 static int sunxi_gpio_input(u32 pin)
55 u32 bank = GPIO_BANK(pin);
56 u32 num = GPIO_NUM(pin);
57 struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
59 dat = readl(&pio->dat);
65 int gpio_request(unsigned gpio, const char *label)
70 int gpio_free(unsigned gpio)
75 int gpio_direction_input(unsigned gpio)
77 sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT);
82 int gpio_direction_output(unsigned gpio, int value)
84 sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_OUTPUT);
86 return sunxi_gpio_output(gpio, value);
89 int gpio_get_value(unsigned gpio)
91 return sunxi_gpio_input(gpio);
94 int gpio_set_value(unsigned gpio, int value)
96 return sunxi_gpio_output(gpio, value);
99 int sunxi_name_to_gpio(const char *name)
102 int groupsize = 9 * 32;
106 if (*name == 'P' || *name == 'p')
109 group = *name - (*name > 'a' ? 'a' : 'A');
114 pin = simple_strtol(name, &eptr, 10);
117 if (pin < 0 || pin > groupsize || group >= 9)
119 return group * 32 + pin;
123 int sunxi_name_to_gpio_bank(const char *name)
127 if (*name == 'P' || *name == 'p')
130 group = *name - (*name > 'a' ? 'a' : 'A');
137 #ifdef CONFIG_DM_GPIO
138 /* TODO(sjg@chromium.org): Remove this function and use device tree */
139 int sunxi_name_to_gpio(const char *name)
143 #if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO
146 if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) {
147 sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
148 SUNXI_GPIO_AXP0_VBUS_DETECT);
150 } else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) {
151 sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
152 SUNXI_GPIO_AXP0_VBUS_ENABLE);
156 ret = gpio_lookup_name(name, NULL, NULL, &gpio);
158 return ret ? ret : gpio;
161 static int sunxi_gpio_direction_input(struct udevice *dev, unsigned offset)
163 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
165 sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_INPUT);
170 static int sunxi_gpio_direction_output(struct udevice *dev, unsigned offset,
173 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
174 u32 num = GPIO_NUM(offset);
176 sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_OUTPUT);
177 clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
182 static int sunxi_gpio_get_value(struct udevice *dev, unsigned offset)
184 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
185 u32 num = GPIO_NUM(offset);
188 dat = readl(&plat->regs->dat);
194 static int sunxi_gpio_set_value(struct udevice *dev, unsigned offset,
197 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
198 u32 num = GPIO_NUM(offset);
200 clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
204 static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset)
206 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
209 func = sunxi_gpio_get_cfgbank(plat->regs, offset);
210 if (func == SUNXI_GPIO_OUTPUT)
212 else if (func == SUNXI_GPIO_INPUT)
218 static const struct dm_gpio_ops gpio_sunxi_ops = {
219 .direction_input = sunxi_gpio_direction_input,
220 .direction_output = sunxi_gpio_direction_output,
221 .get_value = sunxi_gpio_get_value,
222 .set_value = sunxi_gpio_set_value,
223 .get_function = sunxi_gpio_get_function,
227 * Returns the name of a GPIO bank
229 * GPIO banks are named A, B, C, ...
231 * @bank: Bank number (0, 1..n-1)
232 * @return allocated string containing the name
234 static char *gpio_bank_name(int bank)
241 name[1] = 'A' + bank;
248 static int gpio_sunxi_probe(struct udevice *dev)
250 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
251 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
253 /* Tell the uclass how many GPIOs we have */
255 uc_priv->gpio_count = plat->gpio_count;
256 uc_priv->bank_name = plat->bank_name;
262 struct sunxi_gpio_soc_data {
268 * We have a top-level GPIO device with no actual GPIOs. It has a child
269 * device for each Sunxi bank.
271 static int gpio_sunxi_bind(struct udevice *parent)
273 struct sunxi_gpio_soc_data *soc_data =
274 (struct sunxi_gpio_soc_data *)dev_get_driver_data(parent);
275 struct sunxi_gpio_platdata *plat = parent->platdata;
276 struct sunxi_gpio_reg *ctlr;
279 /* If this is a child device, there is nothing to do here */
283 ctlr = (struct sunxi_gpio_reg *)dev_get_addr(parent);
284 for (bank = 0; bank < soc_data->no_banks; bank++) {
285 struct sunxi_gpio_platdata *plat;
288 plat = calloc(1, sizeof(*plat));
291 plat->regs = &ctlr->gpio_bank[bank];
292 plat->bank_name = gpio_bank_name(soc_data->start + bank);
293 plat->gpio_count = SUNXI_GPIOS_PER_BANK;
295 ret = device_bind(parent, parent->driver,
296 plat->bank_name, plat, -1, &dev);
299 dev->of_offset = parent->of_offset;
305 static const struct sunxi_gpio_soc_data soc_data_a_all = {
307 .no_banks = SUNXI_GPIO_BANKS,
310 static const struct sunxi_gpio_soc_data soc_data_l_1 = {
315 static const struct sunxi_gpio_soc_data soc_data_l_2 = {
320 static const struct sunxi_gpio_soc_data soc_data_l_3 = {
325 #define ID(_compat_, _soc_data_) \
326 { .compatible = _compat_, .data = (ulong)&soc_data_##_soc_data_ }
328 static const struct udevice_id sunxi_gpio_ids[] = {
329 ID("allwinner,sun4i-a10-pinctrl", a_all),
330 ID("allwinner,sun5i-a10s-pinctrl", a_all),
331 ID("allwinner,sun5i-a13-pinctrl", a_all),
332 ID("allwinner,sun6i-a31-pinctrl", a_all),
333 ID("allwinner,sun6i-a31s-pinctrl", a_all),
334 ID("allwinner,sun7i-a20-pinctrl", a_all),
335 ID("allwinner,sun8i-a23-pinctrl", a_all),
336 ID("allwinner,sun8i-a33-pinctrl", a_all),
337 ID("allwinner,sun8i-a83t-pinctrl", a_all),
338 ID("allwinner,sun8i-h3-pinctrl", a_all),
339 ID("allwinner,sun9i-a80-pinctrl", a_all),
340 ID("allwinner,sun6i-a31-r-pinctrl", l_2),
341 ID("allwinner,sun8i-a23-r-pinctrl", l_1),
342 ID("allwinner,sun8i-a83t-r-pinctrl", l_1),
343 ID("allwinner,sun8i-h3-r-pinctrl", l_1),
344 ID("allwinner,sun9i-a80-r-pinctrl", l_3),
348 U_BOOT_DRIVER(gpio_sunxi) = {
349 .name = "gpio_sunxi",
351 .ops = &gpio_sunxi_ops,
352 .of_match = sunxi_gpio_ids,
353 .bind = gpio_sunxi_bind,
354 .probe = gpio_sunxi_probe,