1 // SPDX-License-Identifier: GPL-2.0+
3 * Freescale i.MX28 GPIO control code
5 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
6 * on behalf of DENX Software Engineering GmbH
12 #include <linux/errno.h>
14 #include <asm/arch/iomux.h>
15 #include <asm/arch/imx-regs.h>
17 #if defined(CONFIG_MX23)
18 #define PINCTRL_BANKS 3
19 #define PINCTRL_DOUT(n) (0x0500 + ((n) * 0x10))
20 #define PINCTRL_DIN(n) (0x0600 + ((n) * 0x10))
21 #define PINCTRL_DOE(n) (0x0700 + ((n) * 0x10))
22 #define PINCTRL_PIN2IRQ(n) (0x0800 + ((n) * 0x10))
23 #define PINCTRL_IRQEN(n) (0x0900 + ((n) * 0x10))
24 #define PINCTRL_IRQSTAT(n) (0x0c00 + ((n) * 0x10))
25 #elif defined(CONFIG_MX28)
26 #define PINCTRL_BANKS 5
27 #define PINCTRL_DOUT(n) (0x0700 + ((n) * 0x10))
28 #define PINCTRL_DIN(n) (0x0900 + ((n) * 0x10))
29 #define PINCTRL_DOE(n) (0x0b00 + ((n) * 0x10))
30 #define PINCTRL_PIN2IRQ(n) (0x1000 + ((n) * 0x10))
31 #define PINCTRL_IRQEN(n) (0x1100 + ((n) * 0x10))
32 #define PINCTRL_IRQSTAT(n) (0x1400 + ((n) * 0x10))
34 #error "Please select CONFIG_MX23 or CONFIG_MX28"
37 #define GPIO_INT_FALL_EDGE 0x0
38 #define GPIO_INT_LOW_LEV 0x1
39 #define GPIO_INT_RISE_EDGE 0x2
40 #define GPIO_INT_HIGH_LEV 0x3
41 #define GPIO_INT_LEV_MASK (1 << 0)
42 #define GPIO_INT_POL_MASK (1 << 1)
44 void mxs_gpio_init(void)
48 for (i = 0; i < PINCTRL_BANKS; i++) {
49 writel(0, MXS_PINCTRL_BASE + PINCTRL_PIN2IRQ(i));
50 writel(0, MXS_PINCTRL_BASE + PINCTRL_IRQEN(i));
51 /* Use SCT address here to clear the IRQSTAT bits */
52 writel(0xffffffff, MXS_PINCTRL_BASE + PINCTRL_IRQSTAT(i) + 8);
56 #if !CONFIG_IS_ENABLED(DM_GPIO)
57 int gpio_get_value(unsigned gpio)
59 uint32_t bank = PAD_BANK(gpio);
60 uint32_t offset = PINCTRL_DIN(bank);
61 struct mxs_register_32 *reg =
62 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
64 return (readl(®->reg) >> PAD_PIN(gpio)) & 1;
67 void gpio_set_value(unsigned gpio, int value)
69 uint32_t bank = PAD_BANK(gpio);
70 uint32_t offset = PINCTRL_DOUT(bank);
71 struct mxs_register_32 *reg =
72 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
75 writel(1 << PAD_PIN(gpio), ®->reg_set);
77 writel(1 << PAD_PIN(gpio), ®->reg_clr);
80 int gpio_direction_input(unsigned gpio)
82 uint32_t bank = PAD_BANK(gpio);
83 uint32_t offset = PINCTRL_DOE(bank);
84 struct mxs_register_32 *reg =
85 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
87 writel(1 << PAD_PIN(gpio), ®->reg_clr);
92 int gpio_direction_output(unsigned gpio, int value)
94 uint32_t bank = PAD_BANK(gpio);
95 uint32_t offset = PINCTRL_DOE(bank);
96 struct mxs_register_32 *reg =
97 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
99 gpio_set_value(gpio, value);
101 writel(1 << PAD_PIN(gpio), ®->reg_set);
106 int gpio_request(unsigned gpio, const char *label)
108 if (PAD_BANK(gpio) >= PINCTRL_BANKS)
114 int gpio_free(unsigned gpio)
119 int name_to_gpio(const char *name)
124 bank = simple_strtoul(name, &end, 10);
126 if (!*end || *end != ':')
129 pin = simple_strtoul(end + 1, NULL, 10);
131 return (bank << MXS_PAD_BANK_SHIFT) | (pin << MXS_PAD_PIN_SHIFT);
135 #include <asm/gpio.h>
136 #include <dt-structs.h>
137 #include <asm/arch/gpio.h>
138 #define MXS_MAX_GPIO_PER_BANK 32
141 #define dtd_fsl_imx_gpio dtd_fsl_imx28_gpio
142 #else /* CONFIG_MX23 */
143 #define dtd_fsl_imx_gpio dtd_fsl_imx23_gpio
146 DECLARE_GLOBAL_DATA_PTR;
148 * According to i.MX28 Reference Manual:
149 * 'i.MX28 Applications Processor Reference Manual, Rev. 1, 2010'
150 * The i.MX28 has following number of GPIOs available:
151 * Bank 0: 0-28 -> 29 PINS
152 * Bank 1: 0-31 -> 32 PINS
153 * Bank 2: 0-27 -> 28 PINS
154 * Bank 3: 0-30 -> 31 PINS
155 * Bank 4: 0-20 -> 21 PINS
158 struct mxs_gpio_platdata {
159 #if CONFIG_IS_ENABLED(OF_PLATDATA)
160 struct dtd_fsl_imx_gpio dtplat;
166 struct mxs_gpio_priv {
170 static int mxs_gpio_get_value(struct udevice *dev, unsigned offset)
172 struct mxs_gpio_priv *priv = dev_get_priv(dev);
173 struct mxs_register_32 *reg =
174 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
175 PINCTRL_DIN(priv->bank));
177 return (readl(®->reg) >> offset) & 1;
180 static int mxs_gpio_set_value(struct udevice *dev, unsigned offset,
183 struct mxs_gpio_priv *priv = dev_get_priv(dev);
184 struct mxs_register_32 *reg =
185 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
186 PINCTRL_DOUT(priv->bank));
188 writel(BIT(offset), ®->reg_set);
190 writel(BIT(offset), ®->reg_clr);
195 static int mxs_gpio_direction_input(struct udevice *dev, unsigned offset)
197 struct mxs_gpio_priv *priv = dev_get_priv(dev);
198 struct mxs_register_32 *reg =
199 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
200 PINCTRL_DOE(priv->bank));
202 writel(BIT(offset), ®->reg_clr);
207 static int mxs_gpio_direction_output(struct udevice *dev, unsigned offset,
210 struct mxs_gpio_priv *priv = dev_get_priv(dev);
211 struct mxs_register_32 *reg =
212 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
213 PINCTRL_DOE(priv->bank));
215 mxs_gpio_set_value(dev, offset, value);
217 writel(BIT(offset), ®->reg_set);
222 static int mxs_gpio_get_function(struct udevice *dev, unsigned offset)
224 struct mxs_gpio_priv *priv = dev_get_priv(dev);
225 struct mxs_register_32 *reg =
226 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
227 PINCTRL_DOE(priv->bank));
228 bool is_output = !!(readl(®->reg) >> offset);
230 return is_output ? GPIOF_OUTPUT : GPIOF_INPUT;
233 static const struct dm_gpio_ops gpio_mxs_ops = {
234 .direction_input = mxs_gpio_direction_input,
235 .direction_output = mxs_gpio_direction_output,
236 .get_value = mxs_gpio_get_value,
237 .set_value = mxs_gpio_set_value,
238 .get_function = mxs_gpio_get_function,
241 static int mxs_gpio_probe(struct udevice *dev)
243 struct mxs_gpio_platdata *plat = dev_get_platdata(dev);
244 struct mxs_gpio_priv *priv = dev_get_priv(dev);
245 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
248 #if CONFIG_IS_ENABLED(OF_PLATDATA)
249 struct dtd_fsl_imx_gpio *dtplat = &plat->dtplat;
250 priv->bank = (unsigned int)dtplat->reg[0];
251 uc_priv->gpio_count = dtplat->gpio_ranges[3];
253 priv->bank = (unsigned int)plat->bank;
254 uc_priv->gpio_count = plat->gpio_ranges;
256 snprintf(name, sizeof(name), "GPIO%d_", priv->bank);
261 uc_priv->bank_name = str;
263 debug("%s: %s: %d pins base: 0x%x\n", __func__, uc_priv->bank_name,
264 uc_priv->gpio_count, priv->bank);
269 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
270 static int mxs_ofdata_to_platdata(struct udevice *dev)
272 struct mxs_gpio_platdata *plat = dev->platdata;
273 struct fdtdec_phandle_args args;
274 int node = dev_of_offset(dev);
277 plat->bank = devfdt_get_addr(dev);
278 if (plat->bank == FDT_ADDR_T_NONE) {
279 printf("%s: No 'reg' property defined!\n", __func__);
283 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, node, "gpio-ranges",
286 printf("%s: 'gpio-ranges' not defined - using default!\n",
289 plat->gpio_ranges = ret == 0 ? args.args[2] : MXS_MAX_GPIO_PER_BANK;
294 static const struct udevice_id mxs_gpio_ids[] = {
295 { .compatible = "fsl,imx23-gpio" },
296 { .compatible = "fsl,imx28-gpio" },
301 U_BOOT_DRIVER(gpio_mxs) = {
303 .name = "fsl_imx28_gpio",
304 #else /* CONFIG_MX23 */
305 .name = "fsl_imx23_gpio",
308 .ops = &gpio_mxs_ops,
309 .probe = mxs_gpio_probe,
310 .priv_auto_alloc_size = sizeof(struct mxs_gpio_priv),
311 .platdata_auto_alloc_size = sizeof(struct mxs_gpio_platdata),
312 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
313 .of_match = mxs_gpio_ids,
314 .ofdata_to_platdata = mxs_ofdata_to_platdata,