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| author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
|---|---|---|
| committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
| commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
| tree | 65ca85f13617aee1dce474596800950f266a456c /roms/u-boot/drivers/misc/pdsp188x.c | |
| download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip | |
Diffstat (limited to 'roms/u-boot/drivers/misc/pdsp188x.c')
| -rw-r--r-- | roms/u-boot/drivers/misc/pdsp188x.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/misc/pdsp188x.c b/roms/u-boot/drivers/misc/pdsp188x.c new file mode 100644 index 00000000..aa4351a0 --- /dev/null +++ b/roms/u-boot/drivers/misc/pdsp188x.c @@ -0,0 +1,45 @@ +/* + * Copyright 2010 Sergey Poselenov, Emcraft Systems, <sposelenov@emcraft.com> + * Copyright 2010 Ilya Yanok, Emcraft Systems, <yanok@emcraft.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <led-display.h> +#include <asm/io.h> + +#ifdef CONFIG_CMD_DISPLAY +#define CWORD_CLEAR 0x80 +#define CLEAR_DELAY (110 * 2) +#define DISPLAY_SIZE 8 + +static int pos; /* Current display position */ + +/* Handle different display commands */ +void display_set(int cmd) +{ + if (cmd & DISPLAY_CLEAR) { + out_8((unsigned char *)CONFIG_SYS_DISP_CWORD, CWORD_CLEAR); + udelay(1000 * CLEAR_DELAY); + } + + if (cmd & DISPLAY_HOME) { + pos = 0; + } +} + +/* + * Display a character at the current display position. + * Characters beyond the display size are ignored. + */ +int display_putc(char c) +{ + if (pos >= DISPLAY_SIZE) + return -1; + + out_8((unsigned char *)CONFIG_SYS_DISP_CHR_RAM + pos++, c); + + return c; +} +#endif |