mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 07:13:03 +00:00
39f7611fec
As an example of how to write a uclass and a driver, provide a demo version of each, accessible through the 'demo' command. To use these with driver model, define CONFIG_CMD_DEMO and CONFIG_DM_DEMO. The two demo drivers are enabled with CONFIG_DM_DEMO_SIMPLE and CONFIG_DM_DEMO_SHAPE. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com> Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com> Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>
127 lines
2.6 KiB
C
127 lines
2.6 KiB
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>
|
|
|
|
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 */
|
|
};
|
|
|
|
/* Crazy little function to draw shapes on the console */
|
|
static int shape_hello(struct device *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 device *dev, int *status)
|
|
{
|
|
struct shape_data *data = dev_get_priv(dev);
|
|
|
|
*status = data->num_chars;
|
|
return 0;
|
|
}
|
|
|
|
static const struct demo_ops shape_ops = {
|
|
.hello = shape_hello,
|
|
.status = shape_status,
|
|
};
|
|
|
|
static int shape_ofdata_to_platdata(struct device *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 const struct device_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,
|
|
.priv_auto_alloc_size = sizeof(struct shape_data),
|
|
.platdata_auto_alloc_size = sizeof(struct dm_demo_pdata),
|
|
};
|