[J-u-boot.git] / drivers / demo / demo-shape.c

/*
 * Copyright (c) 2013 Google, Inc
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
#include <dm-demo.h>
#include <asm/io.h>
#include <asm/gpio.h>

DECLARE_GLOBAL_DATA_PTR;

/* Shape size */
#define WIDTH	8
#define HEIGHT	6

struct shape_data {
	int num_chars;	/* Number of non-space characters output so far */
	struct gpio_desc gpio_desc[8];
	int gpio_count;
};

/* Crazy little function to draw shapes on the console */
static int shape_hello(struct udevice *dev, int ch)
{
	const struct dm_demo_pdata *pdata = dev_get_platdata(dev);
	struct shape_data *data = dev_get_priv(dev);
	static const struct shape {
		int start;
		int end;
		int dstart;
		int dend;
	} shapes[3] = {
		{ 0, 1, 0, 1 },
		{ 0, WIDTH, 0, 0 },
		{ HEIGHT / 2 - 1, WIDTH - HEIGHT / 2 + 1, -1, 1},
	};
	struct shape shape;
	unsigned int index;
	int line, pos, inside;
	const char *colour = pdata->colour;
	int first = 0;

	if (!ch)
		ch = pdata->default_char;
	if (!ch)
		ch = '@';

	index = (pdata->sides / 2) - 1;
	if (index >= ARRAY_SIZE(shapes))
		return -EIO;
	shape = shapes[index];

	for (line = 0; line < HEIGHT; line++) {
		first = 1;
		for (pos = 0; pos < WIDTH; pos++) {
			inside = pos >= shape.start && pos < shape.end;
			if (inside) {
				putc(first ? *colour++ : ch);
				data->num_chars++;
				first = 0;
				if (!*colour)
					colour = pdata->colour;
			} else {
				putc(' ');
			}
		}
		putc('\n');
		shape.start += shape.dstart;
		shape.end += shape.dend;
		if (shape.start < 0) {
			shape.dstart = -shape.dstart;
			shape.dend = -shape.dend;
			shape.start += shape.dstart;
			shape.end += shape.dend;
		}
	}

	return 0;
}

static int shape_status(struct udevice *dev, int *status)
{
	struct shape_data *data = dev_get_priv(dev);

	*status = data->num_chars;
	return 0;
}

static int set_light(struct udevice *dev, int light)
{
	struct shape_data *priv = dev_get_priv(dev);
	struct gpio_desc *desc;
	int ret;
	int i;

	desc = priv->gpio_desc;
	for (i = 0; i < priv->gpio_count; i++, desc++) {
		uint mask = 1 << i;

		ret = dm_gpio_set_value(desc, light & mask);
		if (ret < 0)
			return ret;
	}

	return 0;
}

static int get_light(struct udevice *dev)
{
	struct shape_data *priv = dev_get_priv(dev);
	struct gpio_desc *desc;
	uint value = 0;
	int ret;
	int i;

	desc = priv->gpio_desc;
	for (i = 0; i < priv->gpio_count; i++, desc++) {
		uint mask = 1 << i;

		ret = dm_gpio_get_value(desc);
		if (ret < 0)
			return ret;
		if (ret)
			value |= mask;
	}

	return value;
}

static const struct demo_ops shape_ops = {
	.hello = shape_hello,
	.status = shape_status,
	.get_light = get_light,
	.set_light = set_light,
};

static int shape_ofdata_to_platdata(struct udevice *dev)
{
	struct dm_demo_pdata *pdata = dev_get_platdata(dev);
	int ret;

	/* Parse the data that is common with all demo devices */
	ret = demo_parse_dt(dev);
	if (ret)
		return ret;

	/* Parse the data that only we need */
	pdata->default_char = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
					     "character", '@');

	return 0;
}

static int dm_shape_probe(struct udevice *dev)
{
	struct shape_data *priv = dev_get_priv(dev);
	int ret;

	ret = gpio_request_list_by_name(dev, "light-gpios", priv->gpio_desc,
					ARRAY_SIZE(priv->gpio_desc),
					GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
	if (ret < 0)
		return ret;
	priv->gpio_count = ret;
	debug("%s: %d GPIOs\n", __func__, priv->gpio_count);

	return 0;
}

static int dm_shape_remove(struct udevice *dev)
{
	struct shape_data *priv = dev_get_priv(dev);

	return gpio_free_list(dev, priv->gpio_desc, priv->gpio_count);
}

static const struct udevice_id demo_shape_id[] = {
	{ "demo-shape", 0 },
	{ },
};

U_BOOT_DRIVER(demo_shape_drv) = {
	.name	= "demo_shape_drv",
	.of_match = demo_shape_id,
	.id	= UCLASS_DEMO,
	.ofdata_to_platdata = shape_ofdata_to_platdata,
	.ops	= &shape_ops,
	.probe = dm_shape_probe,
	.remove = dm_shape_remove,
	.priv_auto_alloc_size = sizeof(struct shape_data),
	.platdata_auto_alloc_size = sizeof(struct dm_demo_pdata),
};
Commit	Line	Data
39f7611f SG	1	/*
	2	* Copyright (c) 2013 Google, Inc
	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
	7	#include <common.h>
	8	#include <dm.h>
	9	#include <errno.h>
	10	#include <fdtdec.h>
	11	#include <malloc.h>
	12	#include <dm-demo.h>
	13	#include <asm/io.h>
a02af4ae	14	#include <asm/gpio.h>
39f7611f SG	15
	16	DECLARE_GLOBAL_DATA_PTR;
	17
	18	/* Shape size */
	19	#define WIDTH 8
	20	#define HEIGHT 6
	21
	22	struct shape_data {
	23	int num_chars; /* Number of non-space characters output so far */
a02af4ae SG	24	struct gpio_desc gpio_desc[8];
a02af4ae SG	25	int gpio_count;
39f7611f SG	26	};
	27
	28	/* Crazy little function to draw shapes on the console */
54c5d08a	29	static int shape_hello(struct udevice *dev, int ch)
39f7611f SG	30	{
	31	const struct dm_demo_pdata *pdata = dev_get_platdata(dev);
	32	struct shape_data *data = dev_get_priv(dev);
	33	static const struct shape {
	34	int start;
	35	int end;
	36	int dstart;
	37	int dend;
	38	} shapes[3] = {
	39	{ 0, 1, 0, 1 },
	40	{ 0, WIDTH, 0, 0 },
	41	{ HEIGHT / 2 - 1, WIDTH - HEIGHT / 2 + 1, -1, 1},
	42	};
	43	struct shape shape;
	44	unsigned int index;
	45	int line, pos, inside;
	46	const char *colour = pdata->colour;
	47	int first = 0;
	48
	49	if (!ch)
	50	ch = pdata->default_char;
	51	if (!ch)
	52	ch = '@';
	53
	54	index = (pdata->sides / 2) - 1;
	55	if (index >= ARRAY_SIZE(shapes))
	56	return -EIO;
	57	shape = shapes[index];
	58
	59	for (line = 0; line < HEIGHT; line++) {
	60	first = 1;
	61	for (pos = 0; pos < WIDTH; pos++) {
	62	inside = pos >= shape.start && pos < shape.end;
	63	if (inside) {
	64	putc(first ? *colour++ : ch);
	65	data->num_chars++;
	66	first = 0;
	67	if (!*colour)
	68	colour = pdata->colour;
	69	} else {
	70	putc(' ');
	71	}
	72	}
	73	putc('\n');
	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;
	81	}
	82	}
	83
	84	return 0;
	85	}
	86
54c5d08a	87	static int shape_status(struct udevice dev, int status)
39f7611f SG	88	{
	89	struct shape_data *data = dev_get_priv(dev);
	90
	91	*status = data->num_chars;
	92	return 0;
	93	}
	94
a02af4ae SG	95	static int set_light(struct udevice *dev, int light)
	96	{
	97	struct shape_data *priv = dev_get_priv(dev);
	98	struct gpio_desc *desc;
	99	int ret;
	100	int i;
	101
	102	desc = priv->gpio_desc;
	103	for (i = 0; i < priv->gpio_count; i++, desc++) {
	104	uint mask = 1 << i;
	105
	106	ret = dm_gpio_set_value(desc, light & mask);
	107	if (ret < 0)
	108	return ret;
	109	}
	110
	111	return 0;
	112	}
	113
	114	static int get_light(struct udevice *dev)
	115	{
	116	struct shape_data *priv = dev_get_priv(dev);
	117	struct gpio_desc *desc;
	118	uint value = 0;
	119	int ret;
	120	int i;
	121
	122	desc = priv->gpio_desc;
	123	for (i = 0; i < priv->gpio_count; i++, desc++) {
	124	uint mask = 1 << i;
	125
	126	ret = dm_gpio_get_value(desc);
	127	if (ret < 0)
	128	return ret;
	129	if (ret)
	130	value \|= mask;
	131	}
	132
	133	return value;
	134	}
	135
39f7611f SG	136	static const struct demo_ops shape_ops = {
	137	.hello = shape_hello,
	138	.status = shape_status,
a02af4ae SG	139	.get_light = get_light,
a02af4ae SG	140	.set_light = set_light,
39f7611f SG	141	};
39f7611f SG	142
54c5d08a	143	static int shape_ofdata_to_platdata(struct udevice *dev)
39f7611f SG	144	{
	145	struct dm_demo_pdata *pdata = dev_get_platdata(dev);
	146	int ret;
	147
	148	/* Parse the data that is common with all demo devices */
	149	ret = demo_parse_dt(dev);
	150	if (ret)
	151	return ret;
	152
	153	/* Parse the data that only we need */
	154	pdata->default_char = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
	155	"character", '@');
	156
	157	return 0;
	158	}
	159
a02af4ae SG	160	static int dm_shape_probe(struct udevice *dev)
	161	{
	162	struct shape_data *priv = dev_get_priv(dev);
	163	int ret;
	164
	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);
	168	if (ret < 0)
	169	return ret;
	170	priv->gpio_count = ret;
	171	debug("%s: %d GPIOs\n", __func__, priv->gpio_count);
	172
	173	return 0;
	174	}
	175
	176	static int dm_shape_remove(struct udevice *dev)
	177	{
	178	struct shape_data *priv = dev_get_priv(dev);
	179
	180	return gpio_free_list(dev, priv->gpio_desc, priv->gpio_count);
	181	}
	182
ae7f4513	183	static const struct udevice_id demo_shape_id[] = {
39f7611f SG	184	{ "demo-shape", 0 },
	185	{ },
	186	};
	187
	188	U_BOOT_DRIVER(demo_shape_drv) = {
	189	.name = "demo_shape_drv",
	190	.of_match = demo_shape_id,
	191	.id = UCLASS_DEMO,
	192	.ofdata_to_platdata = shape_ofdata_to_platdata,
	193	.ops = &shape_ops,
a02af4ae SG	194	.probe = dm_shape_probe,
a02af4ae SG	195	.remove = dm_shape_remove,
39f7611f SG	196	.priv_auto_alloc_size = sizeof(struct shape_data),
	197	.platdata_auto_alloc_size = sizeof(struct dm_demo_pdata),
	198	};