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>
22 #include <dt-bindings/gpio/gpio.h>
24 DECLARE_GLOBAL_DATA_PTR;
26 #define SUNXI_GPIOS_PER_BANK SUNXI_GPIO_A_NR
28 struct sunxi_gpio_platdata {
29 struct sunxi_gpio *regs;
30 const char *bank_name; /* Name of bank, e.g. "B" */
34 #ifndef CONFIG_DM_GPIO
35 static int sunxi_gpio_output(u32 pin, u32 val)
38 u32 bank = GPIO_BANK(pin);
39 u32 num = GPIO_NUM(pin);
40 struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
42 dat = readl(&pio->dat);
48 writel(dat, &pio->dat);
53 static int sunxi_gpio_input(u32 pin)
56 u32 bank = GPIO_BANK(pin);
57 u32 num = GPIO_NUM(pin);
58 struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
60 dat = readl(&pio->dat);
66 int gpio_request(unsigned gpio, const char *label)
71 int gpio_free(unsigned gpio)
76 int gpio_direction_input(unsigned gpio)
78 sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT);
83 int gpio_direction_output(unsigned gpio, int value)
85 sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_OUTPUT);
87 return sunxi_gpio_output(gpio, value);
90 int gpio_get_value(unsigned gpio)
92 return sunxi_gpio_input(gpio);
95 int gpio_set_value(unsigned gpio, int value)
97 return sunxi_gpio_output(gpio, value);
100 int sunxi_name_to_gpio(const char *name)
103 int groupsize = 9 * 32;
107 if (*name == 'P' || *name == 'p')
110 group = *name - (*name > 'a' ? 'a' : 'A');
115 pin = simple_strtol(name, &eptr, 10);
118 if (pin < 0 || pin > groupsize || group >= 9)
120 return group * 32 + pin;
124 int sunxi_name_to_gpio_bank(const char *name)
128 if (*name == 'P' || *name == 'p')
131 group = *name - (*name > 'a' ? 'a' : 'A');
138 #ifdef CONFIG_DM_GPIO
139 /* TODO(sjg@chromium.org): Remove this function and use device tree */
140 int sunxi_name_to_gpio(const char *name)
144 #if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO
147 if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) {
148 sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
149 SUNXI_GPIO_AXP0_VBUS_DETECT);
151 } else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) {
152 sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
153 SUNXI_GPIO_AXP0_VBUS_ENABLE);
157 ret = gpio_lookup_name(name, NULL, NULL, &gpio);
159 return ret ? ret : gpio;
162 static int sunxi_gpio_direction_input(struct udevice *dev, unsigned offset)
164 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
166 sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_INPUT);
171 static int sunxi_gpio_direction_output(struct udevice *dev, unsigned offset,
174 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
175 u32 num = GPIO_NUM(offset);
177 sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_OUTPUT);
178 clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
183 static int sunxi_gpio_get_value(struct udevice *dev, unsigned offset)
185 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
186 u32 num = GPIO_NUM(offset);
189 dat = readl(&plat->regs->dat);
195 static int sunxi_gpio_set_value(struct udevice *dev, unsigned offset,
198 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
199 u32 num = GPIO_NUM(offset);
201 clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
205 static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset)
207 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
210 func = sunxi_gpio_get_cfgbank(plat->regs, offset);
211 if (func == SUNXI_GPIO_OUTPUT)
213 else if (func == SUNXI_GPIO_INPUT)
219 static int sunxi_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
220 struct ofnode_phandle_args *args)
224 ret = device_get_child(dev, args->args[0], &desc->dev);
227 desc->offset = args->args[1];
228 desc->flags = args->args[2] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
233 static const struct dm_gpio_ops gpio_sunxi_ops = {
234 .direction_input = sunxi_gpio_direction_input,
235 .direction_output = sunxi_gpio_direction_output,
236 .get_value = sunxi_gpio_get_value,
237 .set_value = sunxi_gpio_set_value,
238 .get_function = sunxi_gpio_get_function,
239 .xlate = sunxi_gpio_xlate,
243 * Returns the name of a GPIO bank
245 * GPIO banks are named A, B, C, ...
247 * @bank: Bank number (0, 1..n-1)
248 * @return allocated string containing the name
250 static char *gpio_bank_name(int bank)
257 name[1] = 'A' + bank;
264 static int gpio_sunxi_probe(struct udevice *dev)
266 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
267 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
269 /* Tell the uclass how many GPIOs we have */
271 uc_priv->gpio_count = plat->gpio_count;
272 uc_priv->bank_name = plat->bank_name;
278 struct sunxi_gpio_soc_data {
284 * We have a top-level GPIO device with no actual GPIOs. It has a child
285 * device for each Sunxi bank.
287 static int gpio_sunxi_bind(struct udevice *parent)
289 struct sunxi_gpio_soc_data *soc_data =
290 (struct sunxi_gpio_soc_data *)dev_get_driver_data(parent);
291 struct sunxi_gpio_platdata *plat = parent->platdata;
292 struct sunxi_gpio_reg *ctlr;
295 /* If this is a child device, there is nothing to do here */
299 ctlr = (struct sunxi_gpio_reg *)devfdt_get_addr(parent);
300 for (bank = 0; bank < soc_data->no_banks; bank++) {
301 struct sunxi_gpio_platdata *plat;
304 plat = calloc(1, sizeof(*plat));
307 plat->regs = &ctlr->gpio_bank[bank];
308 plat->bank_name = gpio_bank_name(soc_data->start + bank);
309 plat->gpio_count = SUNXI_GPIOS_PER_BANK;
311 ret = device_bind(parent, parent->driver,
312 plat->bank_name, plat, -1, &dev);
315 dev_set_of_offset(dev, dev_of_offset(parent));
321 static const struct sunxi_gpio_soc_data soc_data_a_all = {
323 .no_banks = SUNXI_GPIO_BANKS,
326 static const struct sunxi_gpio_soc_data soc_data_l_1 = {
331 static const struct sunxi_gpio_soc_data soc_data_l_2 = {
336 static const struct sunxi_gpio_soc_data soc_data_l_3 = {
341 #define ID(_compat_, _soc_data_) \
342 { .compatible = _compat_, .data = (ulong)&soc_data_##_soc_data_ }
344 static const struct udevice_id sunxi_gpio_ids[] = {
345 ID("allwinner,sun4i-a10-pinctrl", a_all),
346 ID("allwinner,sun5i-a10s-pinctrl", a_all),
347 ID("allwinner,sun5i-a13-pinctrl", a_all),
348 ID("allwinner,sun6i-a31-pinctrl", a_all),
349 ID("allwinner,sun6i-a31s-pinctrl", a_all),
350 ID("allwinner,sun7i-a20-pinctrl", a_all),
351 ID("allwinner,sun8i-a23-pinctrl", a_all),
352 ID("allwinner,sun8i-a33-pinctrl", a_all),
353 ID("allwinner,sun8i-a83t-pinctrl", a_all),
354 ID("allwinner,sun8i-h3-pinctrl", a_all),
355 ID("allwinner,sun8i-r40-pinctrl", a_all),
356 ID("allwinner,sun9i-a80-pinctrl", a_all),
357 ID("allwinner,sun6i-a31-r-pinctrl", l_2),
358 ID("allwinner,sun8i-a23-r-pinctrl", l_1),
359 ID("allwinner,sun8i-a83t-r-pinctrl", l_1),
360 ID("allwinner,sun8i-h3-r-pinctrl", l_1),
361 ID("allwinner,sun9i-a80-r-pinctrl", l_3),
365 U_BOOT_DRIVER(gpio_sunxi) = {
366 .name = "gpio_sunxi",
368 .ops = &gpio_sunxi_ops,
369 .of_match = sunxi_gpio_ids,
370 .bind = gpio_sunxi_bind,
371 .probe = gpio_sunxi_probe,