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
11 #include <linux/errno.h>
13 #include <asm/arch/iomux.h>
14 #include <asm/arch/imx-regs.h>
16 #if defined(CONFIG_MX23)
17 #define PINCTRL_BANKS 3
18 #define PINCTRL_DOUT(n) (0x0500 + ((n) * 0x10))
19 #define PINCTRL_DIN(n) (0x0600 + ((n) * 0x10))
20 #define PINCTRL_DOE(n) (0x0700 + ((n) * 0x10))
21 #define PINCTRL_PIN2IRQ(n) (0x0800 + ((n) * 0x10))
22 #define PINCTRL_IRQEN(n) (0x0900 + ((n) * 0x10))
23 #define PINCTRL_IRQSTAT(n) (0x0c00 + ((n) * 0x10))
24 #elif defined(CONFIG_MX28)
25 #define PINCTRL_BANKS 5
26 #define PINCTRL_DOUT(n) (0x0700 + ((n) * 0x10))
27 #define PINCTRL_DIN(n) (0x0900 + ((n) * 0x10))
28 #define PINCTRL_DOE(n) (0x0b00 + ((n) * 0x10))
29 #define PINCTRL_PIN2IRQ(n) (0x1000 + ((n) * 0x10))
30 #define PINCTRL_IRQEN(n) (0x1100 + ((n) * 0x10))
31 #define PINCTRL_IRQSTAT(n) (0x1400 + ((n) * 0x10))
33 #error "Please select CONFIG_MX23 or CONFIG_MX28"
36 #define GPIO_INT_FALL_EDGE 0x0
37 #define GPIO_INT_LOW_LEV 0x1
38 #define GPIO_INT_RISE_EDGE 0x2
39 #define GPIO_INT_HIGH_LEV 0x3
40 #define GPIO_INT_LEV_MASK (1 << 0)
41 #define GPIO_INT_POL_MASK (1 << 1)
43 void mxs_gpio_init(void)
47 for (i = 0; i < PINCTRL_BANKS; i++) {
48 writel(0, MXS_PINCTRL_BASE + PINCTRL_PIN2IRQ(i));
49 writel(0, MXS_PINCTRL_BASE + PINCTRL_IRQEN(i));
50 /* Use SCT address here to clear the IRQSTAT bits */
51 writel(0xffffffff, MXS_PINCTRL_BASE + PINCTRL_IRQSTAT(i) + 8);
55 #if !CONFIG_IS_ENABLED(DM_GPIO)
56 int gpio_get_value(unsigned gpio)
58 uint32_t bank = PAD_BANK(gpio);
59 uint32_t offset = PINCTRL_DIN(bank);
60 struct mxs_register_32 *reg =
61 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
63 return (readl(®->reg) >> PAD_PIN(gpio)) & 1;
66 void gpio_set_value(unsigned gpio, int value)
68 uint32_t bank = PAD_BANK(gpio);
69 uint32_t offset = PINCTRL_DOUT(bank);
70 struct mxs_register_32 *reg =
71 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
74 writel(1 << PAD_PIN(gpio), ®->reg_set);
76 writel(1 << PAD_PIN(gpio), ®->reg_clr);
79 int gpio_direction_input(unsigned gpio)
81 uint32_t bank = PAD_BANK(gpio);
82 uint32_t offset = PINCTRL_DOE(bank);
83 struct mxs_register_32 *reg =
84 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
86 writel(1 << PAD_PIN(gpio), ®->reg_clr);
91 int gpio_direction_output(unsigned gpio, int value)
93 uint32_t bank = PAD_BANK(gpio);
94 uint32_t offset = PINCTRL_DOE(bank);
95 struct mxs_register_32 *reg =
96 (struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
98 gpio_set_value(gpio, value);
100 writel(1 << PAD_PIN(gpio), ®->reg_set);
105 int gpio_request(unsigned gpio, const char *label)
107 if (PAD_BANK(gpio) >= PINCTRL_BANKS)
113 int gpio_free(unsigned gpio)
118 int name_to_gpio(const char *name)
123 bank = simple_strtoul(name, &end, 10);
125 if (!*end || *end != ':')
128 pin = simple_strtoul(end + 1, NULL, 10);
130 return (bank << MXS_PAD_BANK_SHIFT) | (pin << MXS_PAD_PIN_SHIFT);
134 #include <asm/gpio.h>
135 #include <dt-structs.h>
136 #include <asm/arch/gpio.h>
137 #define MXS_MAX_GPIO_PER_BANK 32
140 #define dtd_fsl_imx_gpio dtd_fsl_imx28_gpio
141 #else /* CONFIG_MX23 */
142 #define dtd_fsl_imx_gpio dtd_fsl_imx23_gpio
145 DECLARE_GLOBAL_DATA_PTR;
147 * According to i.MX28 Reference Manual:
148 * 'i.MX28 Applications Processor Reference Manual, Rev. 1, 2010'
149 * The i.MX28 has following number of GPIOs available:
150 * Bank 0: 0-28 -> 29 PINS
151 * Bank 1: 0-31 -> 32 PINS
152 * Bank 2: 0-27 -> 28 PINS
153 * Bank 3: 0-30 -> 31 PINS
154 * Bank 4: 0-20 -> 21 PINS
157 struct mxs_gpio_platdata {
158 #if CONFIG_IS_ENABLED(OF_PLATDATA)
159 struct dtd_fsl_imx_gpio dtplat;
165 struct mxs_gpio_priv {
169 static int mxs_gpio_get_value(struct udevice *dev, unsigned offset)
171 struct mxs_gpio_priv *priv = dev_get_priv(dev);
172 struct mxs_register_32 *reg =
173 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
174 PINCTRL_DIN(priv->bank));
176 return (readl(®->reg) >> offset) & 1;
179 static int mxs_gpio_set_value(struct udevice *dev, unsigned offset,
182 struct mxs_gpio_priv *priv = dev_get_priv(dev);
183 struct mxs_register_32 *reg =
184 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
185 PINCTRL_DOUT(priv->bank));
187 writel(BIT(offset), ®->reg_set);
189 writel(BIT(offset), ®->reg_clr);
194 static int mxs_gpio_direction_input(struct udevice *dev, unsigned offset)
196 struct mxs_gpio_priv *priv = dev_get_priv(dev);
197 struct mxs_register_32 *reg =
198 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
199 PINCTRL_DOE(priv->bank));
201 writel(BIT(offset), ®->reg_clr);
206 static int mxs_gpio_direction_output(struct udevice *dev, unsigned offset,
209 struct mxs_gpio_priv *priv = dev_get_priv(dev);
210 struct mxs_register_32 *reg =
211 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
212 PINCTRL_DOE(priv->bank));
214 mxs_gpio_set_value(dev, offset, value);
216 writel(BIT(offset), ®->reg_set);
221 static int mxs_gpio_get_function(struct udevice *dev, unsigned offset)
223 struct mxs_gpio_priv *priv = dev_get_priv(dev);
224 struct mxs_register_32 *reg =
225 (struct mxs_register_32 *)(MXS_PINCTRL_BASE +
226 PINCTRL_DOE(priv->bank));
227 bool is_output = !!(readl(®->reg) >> offset);
229 return is_output ? GPIOF_OUTPUT : GPIOF_INPUT;
232 static const struct dm_gpio_ops gpio_mxs_ops = {
233 .direction_input = mxs_gpio_direction_input,
234 .direction_output = mxs_gpio_direction_output,
235 .get_value = mxs_gpio_get_value,
236 .set_value = mxs_gpio_set_value,
237 .get_function = mxs_gpio_get_function,
240 static int mxs_gpio_probe(struct udevice *dev)
242 struct mxs_gpio_platdata *plat = dev_get_platdata(dev);
243 struct mxs_gpio_priv *priv = dev_get_priv(dev);
244 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
247 #if CONFIG_IS_ENABLED(OF_PLATDATA)
248 struct dtd_fsl_imx_gpio *dtplat = &plat->dtplat;
249 priv->bank = (unsigned int)dtplat->reg[0];
250 uc_priv->gpio_count = dtplat->gpio_ranges[3];
252 priv->bank = (unsigned int)plat->bank;
253 uc_priv->gpio_count = plat->gpio_ranges;
255 snprintf(name, sizeof(name), "GPIO%d_", priv->bank);
260 uc_priv->bank_name = str;
262 debug("%s: %s: %d pins base: 0x%x\n", __func__, uc_priv->bank_name,
263 uc_priv->gpio_count, priv->bank);
268 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
269 static int mxs_ofdata_to_platdata(struct udevice *dev)
271 struct mxs_gpio_platdata *plat = dev->platdata;
272 struct fdtdec_phandle_args args;
273 int node = dev_of_offset(dev);
276 plat->bank = devfdt_get_addr(dev);
277 if (plat->bank == FDT_ADDR_T_NONE) {
278 printf("%s: No 'reg' property defined!\n", __func__);
282 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, node, "gpio-ranges",
285 printf("%s: 'gpio-ranges' not defined - using default!\n",
288 plat->gpio_ranges = ret == 0 ? args.args[2] : MXS_MAX_GPIO_PER_BANK;
293 static const struct udevice_id mxs_gpio_ids[] = {
294 { .compatible = "fsl,imx23-gpio" },
295 { .compatible = "fsl,imx28-gpio" },
300 U_BOOT_DRIVER(gpio_mxs) = {
302 .name = "fsl_imx28_gpio",
303 #else /* CONFIG_MX23 */
304 .name = "fsl_imx23_gpio",
307 .ops = &gpio_mxs_ops,
308 .probe = mxs_gpio_probe,
309 .priv_auto_alloc_size = sizeof(struct mxs_gpio_priv),
310 .platdata_auto_alloc_size = sizeof(struct mxs_gpio_platdata),
311 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
312 .of_match = mxs_gpio_ids,
313 .ofdata_to_platdata = mxs_ofdata_to_platdata,