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freebsd-dev/sys/arm/xscale/i8134x/iq81342_7seg.c
Pedro F. Giffuni af3dc4a7ca sys/arm: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 15:04:10 +00:00

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/* $NetBSD: iq31244_7seg.c,v 1.2 2003/07/15 00:25:01 lukem Exp $ */
/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Support for the 7-segment display on the Intel IQ81342.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <arm/xscale/i8134x/i81342reg.h>
#include <arm/xscale/i8134x/iq81342reg.h>
#include <arm/xscale/i8134x/iq81342var.h>
#define WRITE(x, v) *((__volatile uint8_t *) (x)) = (v)
static int snakestate;
/*
* The 7-segment display looks like so:
*
* A
* +-----+
* | |
* F | | B
* | G |
* +-----+
* | |
* E | | C
* | D |
* +-----+ o DP
*
* Setting a bit clears the corresponding segment on the
* display.
*/
#define SEG_A (1 << 1)
#define SEG_B (1 << 2)
#define SEG_C (1 << 3)
#define SEG_D (1 << 4)
#define SEG_E (1 << 5)
#define SEG_F (1 << 6)
#define SEG_G (1 << 7)
#define SEG_DP (1 << 0)
static const uint8_t digitmap[] = {
/* +#####+
* # #
* # #
* # #
* +-----+
* # #
* # #
* # #
* +#####+
*/
(unsigned char)~SEG_G,
/* +-----+
* | #
* | #
* | #
* +-----+
* | #
* | #
* | #
* +-----+
*/
SEG_B|SEG_C,
/* +#####+
* | #
* | #
* | #
* +#####+
* # |
* # |
* # |
* +#####+
*/
~(SEG_C|SEG_F),
/* +#####+
* | #
* | #
* | #
* +#####+
* | #
* | #
* | #
* +#####+
*/
~(SEG_E|SEG_F),
/* +-----+
* # #
* # #
* # #
* +#####+
* | #
* | #
* | #
* +-----+
*/
~(SEG_A|SEG_D|SEG_E),
/* +#####+
* # |
* # |
* # |
* +#####+
* | #
* | #
* | #
* +#####+
*/
~(SEG_B|SEG_E),
/* +#####+
* # |
* # |
* # |
* +#####+
* # #
* # #
* # #
* +#####+
*/
~(SEG_B),
/* +#####+
* | #
* | #
* | #
* +-----+
* | #
* | #
* | #
* +-----+
*/
~(SEG_D|SEG_E|SEG_F),
/* +#####+
* # #
* # #
* # #
* +#####+
* # #
* # #
* # #
* +#####+
*/
~0,
/* +#####+
* # #
* # #
* # #
* +#####+
* | #
* | #
* | #
* +-----+
*/
~(SEG_D|SEG_E),
};
static uint8_t
iq81342_7seg_xlate(char c)
{
uint8_t rv;
if (c >= '0' && c <= '9')
rv = digitmap[c - '0'];
else if (c == '.')
rv = (uint8_t) ~SEG_DP;
else
rv = 0xff;
return (rv);
}
void
iq81342_7seg(char a, char b)
{
uint8_t msb, lsb;
msb = iq81342_7seg_xlate(a);
lsb = iq81342_7seg_xlate(b);
snakestate = 0;
WRITE(IQ8134X_7SEG_MSB, msb);
WRITE(IQ8134X_7SEG_LSB, lsb);
}
static const uint8_t snakemap[][2] = {
/* +#####+ +#####+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
*/
{ SEG_A, SEG_A },
/* +-----+ +-----+
* # | | #
* # | | #
* # | | #
* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
*/
{ SEG_F, SEG_B },
/* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +#####+ +#####+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
*/
{ SEG_G, SEG_G },
/* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
* | # # |
* | # # |
* | # # |
* +-----+ +-----+
*/
{ SEG_C, SEG_E },
/* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +#####+ +#####+
*/
{ SEG_D, SEG_D },
/* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
* # | | #
* # | | #
* # | | #
* +-----+ +-----+
*/
{ SEG_E, SEG_C },
/* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +#####+ +#####+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
*/
{ SEG_G, SEG_G },
/* +-----+ +-----+
* | # # |
* | # # |
* | # # |
* +-----+ +-----+
* | | | |
* | | | |
* | | | |
* +-----+ +-----+
*/
{ SEG_B, SEG_F },
};
static SYSCTL_NODE(_hw, OID_AUTO, sevenseg, CTLFLAG_RD, 0, "7 seg");
static int freq = 20;
SYSCTL_INT(_hw_sevenseg, OID_AUTO, freq, CTLFLAG_RW, &freq, 0,
"7 Seg update frequency");
static void
iq81342_7seg_snake(void)
{
static int snakefreq;
int cur = snakestate;
snakefreq++;
if ((snakefreq % freq))
return;
WRITE(IQ8134X_7SEG_MSB, snakemap[cur][0]);
WRITE(IQ8134X_7SEG_LSB, snakemap[cur][1]);
snakestate = (cur + 1) & 7;
}
struct iq81342_7seg_softc {
device_t dev;
};
static int
iq81342_7seg_probe(device_t dev)
{
device_set_desc(dev, "IQ81342 7seg");
return (0);
}
extern void (*i80321_hardclock_hook)(void);
static int
iq81342_7seg_attach(device_t dev)
{
i80321_hardclock_hook = iq81342_7seg_snake;
return (0);
}
static device_method_t iq81342_7seg_methods[] = {
DEVMETHOD(device_probe, iq81342_7seg_probe),
DEVMETHOD(device_attach, iq81342_7seg_attach),
{0, 0},
};
static driver_t iq81342_7seg_driver = {
"iqseg",
iq81342_7seg_methods,
sizeof(struct iq81342_7seg_softc),
};
static devclass_t iq81342_7seg_devclass;
DRIVER_MODULE(iqseg, iq, iq81342_7seg_driver, iq81342_7seg_devclass, 0, 0);
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