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 #ifndef CONFIG_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_MX8M)
44 [3] = GPIO4_BASE_ADDR,
46 #if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
47 defined(CONFIG_MX7) || defined(CONFIG_MX8M)
48 [4] = GPIO5_BASE_ADDR,
49 #if !(defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL) || defined(CONFIG_MX8M))
50 [5] = GPIO6_BASE_ADDR,
53 #if defined(CONFIG_MX53) || defined(CONFIG_MX6) || defined(CONFIG_MX7)
54 #if !(defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL))
55 [6] = GPIO7_BASE_ADDR,
60 static int mxc_gpio_direction(unsigned int gpio,
61 enum mxc_gpio_direction direction)
63 unsigned int port = GPIO_TO_PORT(gpio);
64 struct gpio_regs *regs;
67 if (port >= ARRAY_SIZE(gpio_ports))
72 regs = (struct gpio_regs *)gpio_ports[port];
74 l = readl(®s->gpio_dir);
77 case MXC_GPIO_DIRECTION_OUT:
80 case MXC_GPIO_DIRECTION_IN:
83 writel(l, ®s->gpio_dir);
88 int gpio_set_value(unsigned gpio, int value)
90 unsigned int port = GPIO_TO_PORT(gpio);
91 struct gpio_regs *regs;
94 if (port >= ARRAY_SIZE(gpio_ports))
99 regs = (struct gpio_regs *)gpio_ports[port];
101 l = readl(®s->gpio_dr);
106 writel(l, ®s->gpio_dr);
111 int gpio_get_value(unsigned gpio)
113 unsigned int port = GPIO_TO_PORT(gpio);
114 struct gpio_regs *regs;
117 if (port >= ARRAY_SIZE(gpio_ports))
122 regs = (struct gpio_regs *)gpio_ports[port];
124 val = (readl(®s->gpio_psr) >> gpio) & 0x01;
129 int gpio_request(unsigned gpio, const char *label)
131 unsigned int port = GPIO_TO_PORT(gpio);
132 if (port >= ARRAY_SIZE(gpio_ports))
137 int gpio_free(unsigned gpio)
142 int gpio_direction_input(unsigned gpio)
144 return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_IN);
147 int gpio_direction_output(unsigned gpio, int value)
149 int ret = gpio_set_value(gpio, value);
154 return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_OUT);
158 #ifdef CONFIG_DM_GPIO
160 static int mxc_gpio_is_output(struct gpio_regs *regs, int offset)
164 val = readl(®s->gpio_dir);
166 return val & (1 << offset) ? 1 : 0;
169 static void mxc_gpio_bank_direction(struct gpio_regs *regs, int offset,
170 enum mxc_gpio_direction direction)
174 l = readl(®s->gpio_dir);
177 case MXC_GPIO_DIRECTION_OUT:
180 case MXC_GPIO_DIRECTION_IN:
183 writel(l, ®s->gpio_dir);
186 static void mxc_gpio_bank_set_value(struct gpio_regs *regs, int offset,
191 l = readl(®s->gpio_dr);
196 writel(l, ®s->gpio_dr);
199 static int mxc_gpio_bank_get_value(struct gpio_regs *regs, int offset)
201 return (readl(®s->gpio_psr) >> offset) & 0x01;
204 /* set GPIO pin 'gpio' as an input */
205 static int mxc_gpio_direction_input(struct udevice *dev, unsigned offset)
207 struct mxc_bank_info *bank = dev_get_priv(dev);
209 /* Configure GPIO direction as input. */
210 mxc_gpio_bank_direction(bank->regs, offset, MXC_GPIO_DIRECTION_IN);
215 /* set GPIO pin 'gpio' as an output, with polarity 'value' */
216 static int mxc_gpio_direction_output(struct udevice *dev, unsigned offset,
219 struct mxc_bank_info *bank = dev_get_priv(dev);
221 /* Configure GPIO output value. */
222 mxc_gpio_bank_set_value(bank->regs, offset, value);
224 /* Configure GPIO direction as output. */
225 mxc_gpio_bank_direction(bank->regs, offset, MXC_GPIO_DIRECTION_OUT);
230 /* read GPIO IN value of pin 'gpio' */
231 static int mxc_gpio_get_value(struct udevice *dev, unsigned offset)
233 struct mxc_bank_info *bank = dev_get_priv(dev);
235 return mxc_gpio_bank_get_value(bank->regs, offset);
238 /* write GPIO OUT value to pin 'gpio' */
239 static int mxc_gpio_set_value(struct udevice *dev, unsigned offset,
242 struct mxc_bank_info *bank = dev_get_priv(dev);
244 mxc_gpio_bank_set_value(bank->regs, offset, value);
249 static int mxc_gpio_get_function(struct udevice *dev, unsigned offset)
251 struct mxc_bank_info *bank = dev_get_priv(dev);
253 /* GPIOF_FUNC is not implemented yet */
254 if (mxc_gpio_is_output(bank->regs, offset))
260 static const struct dm_gpio_ops gpio_mxc_ops = {
261 .direction_input = mxc_gpio_direction_input,
262 .direction_output = mxc_gpio_direction_output,
263 .get_value = mxc_gpio_get_value,
264 .set_value = mxc_gpio_set_value,
265 .get_function = mxc_gpio_get_function,
268 static int mxc_gpio_probe(struct udevice *dev)
270 struct mxc_bank_info *bank = dev_get_priv(dev);
271 struct mxc_gpio_plat *plat = dev_get_platdata(dev);
272 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
276 banknum = plat->bank_index;
277 sprintf(name, "GPIO%d_", banknum + 1);
281 uc_priv->bank_name = str;
282 uc_priv->gpio_count = GPIO_PER_BANK;
283 bank->regs = plat->regs;
288 static int mxc_gpio_bind(struct udevice *dev)
290 struct mxc_gpio_plat *plat = dev->platdata;
294 * If platdata already exsits, directly return.
295 * Actually only when DT is not supported, platdata
296 * is statically initialized in U_BOOT_DEVICES.Here
302 addr = devfdt_get_addr(dev);
303 if (addr == FDT_ADDR_T_NONE)
308 * When every board is converted to driver model and DT is supported,
309 * this can be done by auto-alloc feature, but not using calloc
310 * to alloc memory for platdata.
312 * For example mxc_plat below uses platform data rather than device
315 * NOTE: DO NOT COPY this code if you are using device tree.
317 plat = calloc(1, sizeof(*plat));
321 plat->regs = (struct gpio_regs *)addr;
322 plat->bank_index = dev->req_seq;
323 dev->platdata = plat;
328 static const struct udevice_id mxc_gpio_ids[] = {
329 { .compatible = "fsl,imx35-gpio" },
333 U_BOOT_DRIVER(gpio_mxc) = {
336 .ops = &gpio_mxc_ops,
337 .probe = mxc_gpio_probe,
338 .priv_auto_alloc_size = sizeof(struct mxc_bank_info),
339 .of_match = mxc_gpio_ids,
340 .bind = mxc_gpio_bind,
343 #if !CONFIG_IS_ENABLED(OF_CONTROL)
344 static const struct mxc_gpio_plat mxc_plat[] = {
345 { 0, (struct gpio_regs *)GPIO1_BASE_ADDR },
346 { 1, (struct gpio_regs *)GPIO2_BASE_ADDR },
347 { 2, (struct gpio_regs *)GPIO3_BASE_ADDR },
348 #if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
349 defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
351 { 3, (struct gpio_regs *)GPIO4_BASE_ADDR },
353 #if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
355 { 4, (struct gpio_regs *)GPIO5_BASE_ADDR },
357 { 5, (struct gpio_regs *)GPIO6_BASE_ADDR },
360 #if defined(CONFIG_MX53) || defined(CONFIG_MX6)
361 { 6, (struct gpio_regs *)GPIO7_BASE_ADDR },
365 U_BOOT_DEVICES(mxc_gpios) = {
366 { "gpio_mxc", &mxc_plat[0] },
367 { "gpio_mxc", &mxc_plat[1] },
368 { "gpio_mxc", &mxc_plat[2] },
369 #if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
370 defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
372 { "gpio_mxc", &mxc_plat[3] },
374 #if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6) || \
376 { "gpio_mxc", &mxc_plat[4] },
378 { "gpio_mxc", &mxc_plat[5] },
381 #if defined(CONFIG_MX53) || defined(CONFIG_MX6)
382 { "gpio_mxc", &mxc_plat[6] },