GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/drivers/demo/demo-shape.c

@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2013 Google, Inc
+ */
+
+#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(dev),
+					     "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),
+};