1 // SPDX-License-Identifier: GPL-2.0+
4 * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
7 * Stefano Babic, DENX Software Engineering, <sbabic@denx.de>
13 #include <asm/arch/imx-regs.h>
17 enum mxc_gpio_direction {
18 MXC_GPIO_DIRECTION_IN,
19 MXC_GPIO_DIRECTION_OUT,
22 #define GPIO_PER_BANK 32
24 struct mxc_gpio_plat {
26 struct gpio_regs *regs;
29 struct mxc_bank_info {
30 struct gpio_regs *regs;
33 #if !CONFIG_IS_ENABLED(DM_GPIO)
34 #define GPIO_TO_PORT(n) ((n) / 32)
36 /* GPIO port description */
37 static unsigned long gpio_ports[] = {
38 [0] = GPIO1_BASE_ADDR,
39 [1] = GPIO2_BASE_ADDR,
40 [2] = GPIO3_BASE_ADDR,
41 #if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
42 defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
43 defined(CONFIG_MX7) || defined(CONFIG_IMX8M) || \
44 defined(CONFIG_ARCH_IMX8) || defined(CONFIG_IMXRT1050)
45 [3] = GPIO4_BASE_ADDR,
47 #if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
48 defined(CONFIG_MX7) || defined(CONFIG_IMX8M) || \
49 defined(CONFIG_ARCH_IMX8) || defined(CONFIG_IMXRT1050)
50 [4] = GPIO5_BASE_ADDR,
51 #if !(defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL) || \
52 defined(CONFIG_IMX8M) || defined(CONFIG_IMXRT1050))
53 [5] = GPIO6_BASE_ADDR,
56 #if defined(CONFIG_MX53) || defined(CONFIG_MX6) || defined(CONFIG_MX7) || \
57 defined(CONFIG_ARCH_IMX8)
58 #if !(defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL))
59 [6] = GPIO7_BASE_ADDR,
62 #if defined(CONFIG_ARCH_IMX8)
63 [7] = GPIO8_BASE_ADDR,
67 static int mxc_gpio_direction(unsigned int gpio,
68 enum mxc_gpio_direction direction)
70 unsigned int port = GPIO_TO_PORT(gpio);
71 struct gpio_regs *regs;
74 if (port >= ARRAY_SIZE(gpio_ports))
79 regs = (struct gpio_regs *)gpio_ports[port];
81 l = readl(®s->gpio_dir);
84 case MXC_GPIO_DIRECTION_OUT:
87 case MXC_GPIO_DIRECTION_IN:
90 writel(l, ®s->gpio_dir);
95 int gpio_set_value(unsigned gpio, int value)
97 unsigned int port = GPIO_TO_PORT(gpio);
98 struct gpio_regs *regs;
101 if (port >= ARRAY_SIZE(gpio_ports))
106 regs = (struct gpio_regs *)gpio_ports[port];
108 l = readl(®s->gpio_dr);
113 writel(l, ®s->gpio_dr);
118 int gpio_get_value(unsigned gpio)
120 unsigned int port = GPIO_TO_PORT(gpio);
121 struct gpio_regs *regs;
124 if (port >= ARRAY_SIZE(gpio_ports))
129 regs = (struct gpio_regs *)gpio_ports[port];
131 val = (readl(®s->gpio_psr) >> gpio) & 0x01;
136 int gpio_request(unsigned gpio, const char *label)
138 unsigned int port = GPIO_TO_PORT(gpio);
139 if (port >= ARRAY_SIZE(gpio_ports))
144 int gpio_free(unsigned gpio)
149 int gpio_direction_input(unsigned gpio)
151 return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_IN);
154 int gpio_direction_output(unsigned gpio, int value)
156 int ret = gpio_set_value(gpio, value);
161 return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_OUT);
165 #if CONFIG_IS_ENABLED(DM_GPIO)
167 static int mxc_gpio_is_output(struct gpio_regs *regs, int offset)
171 val = readl(®s->gpio_dir);
173 return val & (1 << offset) ? 1 : 0;
176 static void mxc_gpio_bank_direction(struct gpio_regs *regs, int offset,
177 enum mxc_gpio_direction direction)
181 l = readl(®s->gpio_dir);
184 case MXC_GPIO_DIRECTION_OUT:
187 case MXC_GPIO_DIRECTION_IN:
190 writel(l, ®s->gpio_dir);
193 static void mxc_gpio_bank_set_value(struct gpio_regs *regs, int offset,
198 l = readl(®s->gpio_dr);
203 writel(l, ®s->gpio_dr);
206 static int mxc_gpio_bank_get_value(struct gpio_regs *regs, int offset)
208 return (readl(®s->gpio_psr) >> offset) & 0x01;
211 /* set GPIO pin 'gpio' as an input */
212 static int mxc_gpio_direction_input(struct udevice *dev, unsigned offset)
214 struct mxc_bank_info *bank = dev_get_priv(dev);
216 /* Configure GPIO direction as input. */
217 mxc_gpio_bank_direction(bank->regs, offset, MXC_GPIO_DIRECTION_IN);
222 /* set GPIO pin 'gpio' as an output, with polarity 'value' */
223 static int mxc_gpio_direction_output(struct udevice *dev, unsigned offset,
226 struct mxc_bank_info *bank = dev_get_priv(dev);
228 /* Configure GPIO output value. */
229 mxc_gpio_bank_set_value(bank->regs, offset, value);
231 /* Configure GPIO direction as output. */
232 mxc_gpio_bank_direction(bank->regs, offset, MXC_GPIO_DIRECTION_OUT);
237 /* read GPIO IN value of pin 'gpio' */
238 static int mxc_gpio_get_value(struct udevice *dev, unsigned offset)
240 struct mxc_bank_info *bank = dev_get_priv(dev);
242 return mxc_gpio_bank_get_value(bank->regs, offset);
245 /* write GPIO OUT value to pin 'gpio' */
246 static int mxc_gpio_set_value(struct udevice *dev, unsigned offset,
249 struct mxc_bank_info *bank = dev_get_priv(dev);
251 mxc_gpio_bank_set_value(bank->regs, offset, value);
256 static int mxc_gpio_get_function(struct udevice *dev, unsigned offset)
258 struct mxc_bank_info *bank = dev_get_priv(dev);
260 /* GPIOF_FUNC is not implemented yet */
261 if (mxc_gpio_is_output(bank->regs, offset))
267 static const struct dm_gpio_ops gpio_mxc_ops = {
268 .direction_input = mxc_gpio_direction_input,
269 .direction_output = mxc_gpio_direction_output,
270 .get_value = mxc_gpio_get_value,
271 .set_value = mxc_gpio_set_value,
272 .get_function = mxc_gpio_get_function,
275 static int mxc_gpio_probe(struct udevice *dev)
277 struct mxc_bank_info *bank = dev_get_priv(dev);
278 struct mxc_gpio_plat *plat = dev_get_platdata(dev);
279 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
283 banknum = plat->bank_index;
284 if (IS_ENABLED(CONFIG_ARCH_IMX8))
285 sprintf(name, "GPIO%d_", banknum);
287 sprintf(name, "GPIO%d_", banknum + 1);
291 uc_priv->bank_name = str;
292 uc_priv->gpio_count = GPIO_PER_BANK;
293 bank->regs = plat->regs;
298 static int mxc_gpio_bind(struct udevice *dev)
300 struct mxc_gpio_plat *plat = dev->platdata;
304 * If platdata already exsits, directly return.
305 * Actually only when DT is not supported, platdata
306 * is statically initialized in U_BOOT_DEVICES.Here
312 addr = devfdt_get_addr(dev);
313 if (addr == FDT_ADDR_T_NONE)
318 * When every board is converted to driver model and DT is supported,
319 * this can be done by auto-alloc feature, but not using calloc
320 * to alloc memory for platdata.
322 * For example mxc_plat below uses platform data rather than device
325 * NOTE: DO NOT COPY this code if you are using device tree.
327 plat = calloc(1, sizeof(*plat));
331 plat->regs = (struct gpio_regs *)addr;
332 plat->bank_index = dev->req_seq;
333 dev->platdata = plat;
338 static const struct udevice_id mxc_gpio_ids[] = {
339 { .compatible = "fsl,imx35-gpio" },
343 U_BOOT_DRIVER(gpio_mxc) = {
346 .ops = &gpio_mxc_ops,
347 .probe = mxc_gpio_probe,
348 .priv_auto_alloc_size = sizeof(struct mxc_bank_info),
349 .of_match = mxc_gpio_ids,
350 .bind = mxc_gpio_bind,
353 #if !CONFIG_IS_ENABLED(OF_CONTROL)
354 static const struct mxc_gpio_plat mxc_plat[] = {
355 { 0, (struct gpio_regs *)GPIO1_BASE_ADDR },
356 { 1, (struct gpio_regs *)GPIO2_BASE_ADDR },
357 { 2, (struct gpio_regs *)GPIO3_BASE_ADDR },
358 #if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
359 defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
360 defined(CONFIG_IMX8M) || defined(CONFIG_ARCH_IMX8)
361 { 3, (struct gpio_regs *)GPIO4_BASE_ADDR },
363 #if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
364 defined(CONFIG_IMX8M) || defined(CONFIG_ARCH_IMX8)
365 { 4, (struct gpio_regs *)GPIO5_BASE_ADDR },
367 { 5, (struct gpio_regs *)GPIO6_BASE_ADDR },
370 #if defined(CONFIG_MX53) || defined(CONFIG_MX6) || defined(CONFIG_ARCH_IMX8)
371 { 6, (struct gpio_regs *)GPIO7_BASE_ADDR },
373 #if defined(CONFIG_ARCH_IMX8)
374 { 7, (struct gpio_regs *)GPIO8_BASE_ADDR },
378 U_BOOT_DEVICES(mxc_gpios) = {
379 { "gpio_mxc", &mxc_plat[0] },
380 { "gpio_mxc", &mxc_plat[1] },
381 { "gpio_mxc", &mxc_plat[2] },
382 #if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
383 defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
384 defined(CONFIG_IMX8M) || defined(CONFIG_ARCH_IMX8)
385 { "gpio_mxc", &mxc_plat[3] },
387 #if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
388 defined(CONFIG_IMX8M) || defined(CONFIG_ARCH_IMX8)
389 { "gpio_mxc", &mxc_plat[4] },
391 { "gpio_mxc", &mxc_plat[5] },
394 #if defined(CONFIG_MX53) || defined(CONFIG_MX6) || defined(CONFIG_ARCH_IMX8)
395 { "gpio_mxc", &mxc_plat[6] },
397 #if defined(CONFIG_ARCH_IMX8)
398 { "gpio_mxc", &mxc_plat[7] },