1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2013 Google, Inc
16 DECLARE_GLOBAL_DATA_PTR;
23 int num_chars; /* Number of non-space characters output so far */
24 struct gpio_desc gpio_desc[8];
28 /* Crazy little function to draw shapes on the console */
29 static int shape_hello(struct udevice *dev, int ch)
31 const struct dm_demo_pdata *pdata = dev_get_plat(dev);
32 struct shape_data *data = dev_get_priv(dev);
33 static const struct shape {
41 { HEIGHT / 2 - 1, WIDTH - HEIGHT / 2 + 1, -1, 1},
45 int line, pos, inside;
46 const char *colour = pdata->colour;
50 ch = pdata->default_char;
54 index = (pdata->sides / 2) - 1;
55 if (index >= ARRAY_SIZE(shapes))
57 shape = shapes[index];
59 for (line = 0; line < HEIGHT; line++) {
61 for (pos = 0; pos < WIDTH; pos++) {
62 inside = pos >= shape.start && pos < shape.end;
64 putc(first ? *colour++ : ch);
68 colour = pdata->colour;
74 shape.start += shape.dstart;
75 shape.end += shape.dend;
76 if (shape.start < 0) {
77 shape.dstart = -shape.dstart;
78 shape.dend = -shape.dend;
79 shape.start += shape.dstart;
80 shape.end += shape.dend;
87 static int shape_status(struct udevice *dev, int *status)
89 struct shape_data *data = dev_get_priv(dev);
91 *status = data->num_chars;
95 static int set_light(struct udevice *dev, int light)
97 struct shape_data *priv = dev_get_priv(dev);
98 struct gpio_desc *desc;
102 desc = priv->gpio_desc;
103 for (i = 0; i < priv->gpio_count; i++, desc++) {
106 ret = dm_gpio_set_value(desc, light & mask);
114 static int get_light(struct udevice *dev)
116 struct shape_data *priv = dev_get_priv(dev);
117 struct gpio_desc *desc;
122 desc = priv->gpio_desc;
123 for (i = 0; i < priv->gpio_count; i++, desc++) {
126 ret = dm_gpio_get_value(desc);
136 static const struct demo_ops shape_ops = {
137 .hello = shape_hello,
138 .status = shape_status,
139 .get_light = get_light,
140 .set_light = set_light,
143 static int shape_of_to_plat(struct udevice *dev)
145 struct dm_demo_pdata *pdata = dev_get_plat(dev);
148 /* Parse the data that is common with all demo devices */
149 ret = demo_parse_dt(dev);
153 /* Parse the data that only we need */
154 pdata->default_char = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
160 static int dm_shape_probe(struct udevice *dev)
162 struct shape_data *priv = dev_get_priv(dev);
165 ret = gpio_request_list_by_name(dev, "light-gpios", priv->gpio_desc,
166 ARRAY_SIZE(priv->gpio_desc),
167 GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
170 priv->gpio_count = ret;
171 debug("%s: %d GPIOs\n", __func__, priv->gpio_count);
176 static int dm_shape_remove(struct udevice *dev)
178 struct shape_data *priv = dev_get_priv(dev);
180 return gpio_free_list(dev, priv->gpio_desc, priv->gpio_count);
183 static const struct udevice_id demo_shape_id[] = {
188 U_BOOT_DRIVER(demo_shape_drv) = {
189 .name = "demo_shape_drv",
190 .of_match = demo_shape_id,
192 .of_to_plat = shape_of_to_plat,
194 .probe = dm_shape_probe,
195 .remove = dm_shape_remove,
196 .priv_auto = sizeof(struct shape_data),
197 .plat_auto = sizeof(struct dm_demo_pdata),