| Simon Glass | 39f7611 | 2014-02-26 15:59:23 -0700 | [diff] [blame] | 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> |
| 14 | |
| 15 | DECLARE_GLOBAL_DATA_PTR; |
| 16 | |
| 17 | /* Shape size */ |
| 18 | #define WIDTH 8 |
| 19 | #define HEIGHT 6 |
| 20 | |
| 21 | struct shape_data { |
| 22 | int num_chars; /* Number of non-space characters output so far */ |
| 23 | }; |
| 24 | |
| 25 | /* Crazy little function to draw shapes on the console */ |
| 26 | static int shape_hello(struct device *dev, int ch) |
| 27 | { |
| 28 | const struct dm_demo_pdata *pdata = dev_get_platdata(dev); |
| 29 | struct shape_data *data = dev_get_priv(dev); |
| 30 | static const struct shape { |
| 31 | int start; |
| 32 | int end; |
| 33 | int dstart; |
| 34 | int dend; |
| 35 | } shapes[3] = { |
| 36 | { 0, 1, 0, 1 }, |
| 37 | { 0, WIDTH, 0, 0 }, |
| 38 | { HEIGHT / 2 - 1, WIDTH - HEIGHT / 2 + 1, -1, 1}, |
| 39 | }; |
| 40 | struct shape shape; |
| 41 | unsigned int index; |
| 42 | int line, pos, inside; |
| 43 | const char *colour = pdata->colour; |
| 44 | int first = 0; |
| 45 | |
| 46 | if (!ch) |
| 47 | ch = pdata->default_char; |
| 48 | if (!ch) |
| 49 | ch = '@'; |
| 50 | |
| 51 | index = (pdata->sides / 2) - 1; |
| 52 | if (index >= ARRAY_SIZE(shapes)) |
| 53 | return -EIO; |
| 54 | shape = shapes[index]; |
| 55 | |
| 56 | for (line = 0; line < HEIGHT; line++) { |
| 57 | first = 1; |
| 58 | for (pos = 0; pos < WIDTH; pos++) { |
| 59 | inside = pos >= shape.start && pos < shape.end; |
| 60 | if (inside) { |
| 61 | putc(first ? *colour++ : ch); |
| 62 | data->num_chars++; |
| 63 | first = 0; |
| 64 | if (!*colour) |
| 65 | colour = pdata->colour; |
| 66 | } else { |
| 67 | putc(' '); |
| 68 | } |
| 69 | } |
| 70 | putc('\n'); |
| 71 | shape.start += shape.dstart; |
| 72 | shape.end += shape.dend; |
| 73 | if (shape.start < 0) { |
| 74 | shape.dstart = -shape.dstart; |
| 75 | shape.dend = -shape.dend; |
| 76 | shape.start += shape.dstart; |
| 77 | shape.end += shape.dend; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | static int shape_status(struct device *dev, int *status) |
| 85 | { |
| 86 | struct shape_data *data = dev_get_priv(dev); |
| 87 | |
| 88 | *status = data->num_chars; |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | static const struct demo_ops shape_ops = { |
| 93 | .hello = shape_hello, |
| 94 | .status = shape_status, |
| 95 | }; |
| 96 | |
| 97 | static int shape_ofdata_to_platdata(struct device *dev) |
| 98 | { |
| 99 | struct dm_demo_pdata *pdata = dev_get_platdata(dev); |
| 100 | int ret; |
| 101 | |
| 102 | /* Parse the data that is common with all demo devices */ |
| 103 | ret = demo_parse_dt(dev); |
| 104 | if (ret) |
| 105 | return ret; |
| 106 | |
| 107 | /* Parse the data that only we need */ |
| 108 | pdata->default_char = fdtdec_get_int(gd->fdt_blob, dev->of_offset, |
| 109 | "character", '@'); |
| 110 | |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | static const struct device_id demo_shape_id[] = { |
| 115 | { "demo-shape", 0 }, |
| 116 | { }, |
| 117 | }; |
| 118 | |
| 119 | U_BOOT_DRIVER(demo_shape_drv) = { |
| 120 | .name = "demo_shape_drv", |
| 121 | .of_match = demo_shape_id, |
| 122 | .id = UCLASS_DEMO, |
| 123 | .ofdata_to_platdata = shape_ofdata_to_platdata, |
| 124 | .ops = &shape_ops, |
| 125 | .priv_auto_alloc_size = sizeof(struct shape_data), |
| 126 | .platdata_auto_alloc_size = sizeof(struct dm_demo_pdata), |
| 127 | }; |