128 lines
2.6 KiB
C
128 lines
2.6 KiB
C
/*
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* Copyright (c) 2013 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <malloc.h>
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#include <dm-demo.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* Shape size */
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#define WIDTH 8
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#define HEIGHT 6
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struct shape_data {
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int num_chars; /* Number of non-space characters output so far */
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};
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/* Crazy little function to draw shapes on the console */
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static int shape_hello(struct device *dev, int ch)
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{
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const struct dm_demo_pdata *pdata = dev_get_platdata(dev);
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struct shape_data *data = dev_get_priv(dev);
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static const struct shape {
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int start;
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int end;
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int dstart;
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int dend;
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} shapes[3] = {
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{ 0, 1, 0, 1 },
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{ 0, WIDTH, 0, 0 },
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{ HEIGHT / 2 - 1, WIDTH - HEIGHT / 2 + 1, -1, 1},
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};
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struct shape shape;
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unsigned int index;
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int line, pos, inside;
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const char *colour = pdata->colour;
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int first = 0;
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if (!ch)
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ch = pdata->default_char;
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if (!ch)
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ch = '@';
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index = (pdata->sides / 2) - 1;
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if (index >= ARRAY_SIZE(shapes))
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return -EIO;
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shape = shapes[index];
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for (line = 0; line < HEIGHT; line++) {
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first = 1;
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for (pos = 0; pos < WIDTH; pos++) {
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inside = pos >= shape.start && pos < shape.end;
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if (inside) {
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putc(first ? *colour++ : ch);
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data->num_chars++;
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first = 0;
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if (!*colour)
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colour = pdata->colour;
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} else {
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putc(' ');
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}
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}
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putc('\n');
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shape.start += shape.dstart;
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shape.end += shape.dend;
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if (shape.start < 0) {
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shape.dstart = -shape.dstart;
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shape.dend = -shape.dend;
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shape.start += shape.dstart;
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shape.end += shape.dend;
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}
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}
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return 0;
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}
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static int shape_status(struct device *dev, int *status)
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{
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struct shape_data *data = dev_get_priv(dev);
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*status = data->num_chars;
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return 0;
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}
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static const struct demo_ops shape_ops = {
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.hello = shape_hello,
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.status = shape_status,
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};
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static int shape_ofdata_to_platdata(struct device *dev)
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{
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struct dm_demo_pdata *pdata = dev_get_platdata(dev);
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int ret;
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/* Parse the data that is common with all demo devices */
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ret = demo_parse_dt(dev);
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if (ret)
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return ret;
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/* Parse the data that only we need */
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pdata->default_char = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
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"character", '@');
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return 0;
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}
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static const struct device_id demo_shape_id[] = {
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{ "demo-shape", 0 },
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{ },
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};
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U_BOOT_DRIVER(demo_shape_drv) = {
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.name = "demo_shape_drv",
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.of_match = demo_shape_id,
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.id = UCLASS_DEMO,
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.ofdata_to_platdata = shape_ofdata_to_platdata,
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.ops = &shape_ops,
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.priv_auto_alloc_size = sizeof(struct shape_data),
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.platdata_auto_alloc_size = sizeof(struct dm_demo_pdata),
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};
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