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
10 #include <linux/errno.h>
12 #include <asm/arch/iomux.h>
13 #include <asm/arch/imx-regs.h>
15 #if defined(CONFIG_MX23)
16 #define PINCTRL_BANKS 3
17 #define PINCTRL_DOUT(n) (0x0500 + ((n) * 0x10))
18 #define PINCTRL_DIN(n) (0x0600 + ((n) * 0x10))
19 #define PINCTRL_DOE(n) (0x0700 + ((n) * 0x10))
20 #define PINCTRL_PIN2IRQ(n) (0x0800 + ((n) * 0x10))
21 #define PINCTRL_IRQEN(n) (0x0900 + ((n) * 0x10))
22 #define PINCTRL_IRQSTAT(n) (0x0c00 + ((n) * 0x10))
23 #elif defined(CONFIG_MX28)
24 #define PINCTRL_BANKS 5
25 #define PINCTRL_DOUT(n) (0x0700 + ((n) * 0x10))
26 #define PINCTRL_DIN(n) (0x0900 + ((n) * 0x10))
27 #define PINCTRL_DOE(n) (0x0b00 + ((n) * 0x10))
28 #define PINCTRL_PIN2IRQ(n) (0x1000 + ((n) * 0x10))
29 #define PINCTRL_IRQEN(n) (0x1100 + ((n) * 0x10))
30 #define PINCTRL_IRQSTAT(n) (0x1400 + ((n) * 0x10))
32 #error "Please select CONFIG_MX23 or CONFIG_MX28"
35 #define GPIO_INT_FALL_EDGE 0x0
36 #define GPIO_INT_LOW_LEV 0x1
37 #define GPIO_INT_RISE_EDGE 0x2
38 #define GPIO_INT_HIGH_LEV 0x3
39 #define GPIO_INT_LEV_MASK (1 << 0)
40 #define GPIO_INT_POL_MASK (1 << 1)
42 void mxs_gpio_init(void)
46 for (i = 0; i < PINCTRL_BANKS; i++) {
47 writel(0, MXS_PINCTRL_BASE + PINCTRL_PIN2IRQ(i));
48 writel(0, MXS_PINCTRL_BASE + PINCTRL_IRQEN(i));
49 /* Use SCT address here to clear the IRQSTAT bits */
50 writel(0xffffffff, MXS_PINCTRL_BASE + PINCTRL_IRQSTAT(i) + 8);
54 #if !CONFIG_IS_ENABLED(DM_GPIO)
55 int gpio_get_value(unsigned gpio)
57 uint32_t bank = PAD_BANK(gpio);
58 uint32_t offset = PINCTRL_DIN(bank);
59 struct mxs_register_32 *reg =
60 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
62 return (readl(®->reg) >> PAD_PIN(gpio)) & 1;
65 void gpio_set_value(unsigned gpio, int value)
67 uint32_t bank = PAD_BANK(gpio);
68 uint32_t offset = PINCTRL_DOUT(bank);
69 struct mxs_register_32 *reg =
70 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
73 writel(1 << PAD_PIN(gpio), ®->reg_set);
75 writel(1 << PAD_PIN(gpio), ®->reg_clr);
78 int gpio_direction_input(unsigned gpio)
80 uint32_t bank = PAD_BANK(gpio);
81 uint32_t offset = PINCTRL_DOE(bank);
82 struct mxs_register_32 *reg =
83 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
85 writel(1 << PAD_PIN(gpio), ®->reg_clr);
90 int gpio_direction_output(unsigned gpio, int value)
92 uint32_t bank = PAD_BANK(gpio);
93 uint32_t offset = PINCTRL_DOE(bank);
94 struct mxs_register_32 *reg =
95 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
97 gpio_set_value(gpio, value);
99 writel(1 << PAD_PIN(gpio), ®->reg_set);
104 int gpio_request(unsigned gpio, const char *label)
106 if (PAD_BANK(gpio) >= PINCTRL_BANKS)
112 int gpio_free(unsigned gpio)
117 int name_to_gpio(const char *name)
122 bank = simple_strtoul(name, &end, 10);
124 if (!*end || *end != ':')
127 pin = simple_strtoul(end + 1, NULL, 10);
129 return (bank << MXS_PAD_BANK_SHIFT) | (pin << MXS_PAD_PIN_SHIFT);
131 #else /* CONFIG_DM_GPIO */
133 #include <asm/gpio.h>
134 #include <dt-structs.h>
135 #include <asm/arch/gpio.h>
136 #define MXS_MAX_GPIO_PER_BANK 32
139 #define dtd_fsl_imx_gpio dtd_fsl_imx28_gpio
140 #else /* CONFIG_MX23 */
141 #define dtd_fsl_imx_gpio dtd_fsl_imx23_gpio
144 DECLARE_GLOBAL_DATA_PTR;
146 * According to i.MX28 Reference Manual:
147 * 'i.MX28 Applications Processor Reference Manual, Rev. 1, 2010'
148 * The i.MX28 has following number of GPIOs available:
149 * Bank 0: 0-28 -> 29 PINS
150 * Bank 1: 0-31 -> 32 PINS
151 * Bank 2: 0-27 -> 28 PINS
152 * Bank 3: 0-30 -> 31 PINS
153 * Bank 4: 0-20 -> 21 PINS
156 struct mxs_gpio_platdata {
157 #if CONFIG_IS_ENABLED(OF_PLATDATA)
158 struct dtd_fsl_imx_gpio dtplat;
164 struct mxs_gpio_priv {
168 static int mxs_gpio_get_value(struct udevice *dev, unsigned offset)
170 struct mxs_gpio_priv *priv = dev_get_priv(dev);
171 struct mxs_register_32 *reg =
172 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
173 PINCTRL_DIN(priv->bank));
175 return (readl(®->reg) >> offset) & 1;
178 static int mxs_gpio_set_value(struct udevice *dev, unsigned offset,
181 struct mxs_gpio_priv *priv = dev_get_priv(dev);
182 struct mxs_register_32 *reg =
183 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
184 PINCTRL_DOUT(priv->bank));
186 writel(BIT(offset), ®->reg_set);
188 writel(BIT(offset), ®->reg_clr);
193 static int mxs_gpio_direction_input(struct udevice *dev, unsigned offset)
195 struct mxs_gpio_priv *priv = dev_get_priv(dev);
196 struct mxs_register_32 *reg =
197 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
198 PINCTRL_DOE(priv->bank));
200 writel(BIT(offset), ®->reg_clr);
205 static int mxs_gpio_direction_output(struct udevice *dev, unsigned offset,
208 struct mxs_gpio_priv *priv = dev_get_priv(dev);
209 struct mxs_register_32 *reg =
210 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
211 PINCTRL_DOE(priv->bank));
213 mxs_gpio_set_value(dev, offset, value);
215 writel(BIT(offset), ®->reg_set);
220 static int mxs_gpio_get_function(struct udevice *dev, unsigned offset)
222 struct mxs_gpio_priv *priv = dev_get_priv(dev);
223 struct mxs_register_32 *reg =
224 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
225 PINCTRL_DOE(priv->bank));
226 bool is_output = !!(readl(®->reg) >> offset);
228 return is_output ? GPIOF_OUTPUT : GPIOF_INPUT;
231 static const struct dm_gpio_ops gpio_mxs_ops = {
232 .direction_input = mxs_gpio_direction_input,
233 .direction_output = mxs_gpio_direction_output,
234 .get_value = mxs_gpio_get_value,
235 .set_value = mxs_gpio_set_value,
236 .get_function = mxs_gpio_get_function,
239 static int mxs_gpio_probe(struct udevice *dev)
241 struct mxs_gpio_platdata *plat = dev_get_platdata(dev);
242 struct mxs_gpio_priv *priv = dev_get_priv(dev);
243 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
246 #if CONFIG_IS_ENABLED(OF_PLATDATA)
247 struct dtd_fsl_imx_gpio *dtplat = &plat->dtplat;
248 priv->bank = (unsigned int)dtplat->reg[0];
249 uc_priv->gpio_count = dtplat->gpio_ranges[3];
251 priv->bank = (unsigned int)plat->bank;
252 uc_priv->gpio_count = plat->gpio_ranges;
254 snprintf(name, sizeof(name), "GPIO%d_", priv->bank);
259 uc_priv->bank_name = str;
261 debug("%s: %s: %d pins base: 0x%x\n", __func__, uc_priv->bank_name,
262 uc_priv->gpio_count, priv->bank);
267 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
268 static int mxs_ofdata_to_platdata(struct udevice *dev)
270 struct mxs_gpio_platdata *plat = dev->platdata;
271 struct fdtdec_phandle_args args;
272 int node = dev_of_offset(dev);
275 plat->bank = devfdt_get_addr(dev);
276 if (plat->bank == FDT_ADDR_T_NONE) {
277 printf("%s: No 'reg' property defined!\n", __func__);
281 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, node, "gpio-ranges",
284 printf("%s: 'gpio-ranges' not defined - using default!\n",
287 plat->gpio_ranges = ret == 0 ? args.args[2] : MXS_MAX_GPIO_PER_BANK;
292 static const struct udevice_id mxs_gpio_ids[] = {
293 { .compatible = "fsl,imx23-gpio" },
294 { .compatible = "fsl,imx28-gpio" },
299 U_BOOT_DRIVER(gpio_mxs) = {
301 .name = "fsl_imx28_gpio",
302 #else /* CONFIG_MX23 */
303 .name = "fsl_imx23_gpio",
306 .ops = &gpio_mxs_ops,
307 .probe = mxs_gpio_probe,
308 .priv_auto_alloc_size = sizeof(struct mxs_gpio_priv),
309 .platdata_auto_alloc_size = sizeof(struct mxs_gpio_platdata),
310 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
311 .of_match = mxs_gpio_ids,
312 .ofdata_to_platdata = mxs_ofdata_to_platdata,
315 #endif /* CONFIG_DM_GPIO */