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Viewing changes to roms/u-boot/drivers/misc/pdsp188x.c

  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/u-boot/drivers/misc/pdsp188x.c
 
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/*
 
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 * Copyright 2010 Sergey Poselenov, Emcraft Systems, <sposelenov@emcraft.com>
 
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 * Copyright 2010 Ilya Yanok, Emcraft Systems, <yanok@emcraft.com>
 
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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 <led-display.h>
 
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#include <asm/io.h>
 
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#ifdef CONFIG_CMD_DISPLAY
 
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#define CWORD_CLEAR     0x80
 
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#define CLEAR_DELAY     (110 * 2)
 
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#define DISPLAY_SIZE    8
 
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static int pos; /* Current display position */
 
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/* Handle different display commands */
 
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void display_set(int cmd)
 
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{
 
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        if (cmd & DISPLAY_CLEAR) {
 
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                out_8((unsigned char *)CONFIG_SYS_DISP_CWORD, CWORD_CLEAR);
 
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                udelay(1000 * CLEAR_DELAY);
 
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        }
 
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        if (cmd & DISPLAY_HOME) {
 
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                pos = 0;
 
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        }
 
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}
 
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/*
 
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 * Display a character at the current display position.
 
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 * Characters beyond the display size are ignored.
 
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 */
 
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int display_putc(char c)
 
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{
 
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        if (pos >= DISPLAY_SIZE)
 
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                return -1;
 
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        out_8((unsigned char *)CONFIG_SYS_DISP_CHR_RAM + pos++, c);
 
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        return c;
 
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}
 
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#endif