Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mn10300/unit-asb2364/leds.c
10817 views
1
/* leds.c: ASB2364 peripheral 7seg LEDs x4 support

2
 *

3
 * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.

4
 * Written by David Howells ([email protected])

5
 *

6
 * This program is free software; you can redistribute it and/or

7
 * modify it under the terms of the GNU General Public License

8
 * as published by the Free Software Foundation; either version

9
 * 2 of the License, or (at your option) any later version.

10
 */

11


12
#include <linux/kernel.h>

13
#include <linux/param.h>

14
#include <linux/init.h>

15


16
#include <asm/io.h>

17
#include <asm/processor.h>

18
#include <asm/intctl-regs.h>

19
#include <asm/rtc-regs.h>

20
#include <unit/leds.h>

21


22
#if MN10300_USE_7SEGLEDS

23
static const u8 asb2364_led_hex_tbl[16] = {

24
	0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,

25
	0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c

26
};

27


28
static const u32 asb2364_led_chase_tbl[6] = {

29
	~0x02020202,	/* top		- segA */

30
	~0x04040404,	/* right top	- segB */

31
	~0x08080808,	/* right bottom	- segC */

32
	~0x10101010,	/* bottom	- segD */

33
	~0x20202020,	/* left bottom	- segE */

34
	~0x40404040,	/* left top	- segF */

35
};

36


37
static unsigned asb2364_led_chase;

38


39
void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points)

40
{

41
	u32 leds;

42


43
	leds = asb2364_led_hex_tbl[(val/1000) % 10];

44
	leds <<= 8;

45
	leds |= asb2364_led_hex_tbl[(val/100) % 10];

46
	leds <<= 8;

47
	leds |= asb2364_led_hex_tbl[(val/10) % 10];

48
	leds <<= 8;

49
	leds |= asb2364_led_hex_tbl[val % 10];

50
	leds |= points^0x01010101;

51


52
	ASB2364_7SEGLEDS = leds;

53
}

54


55
void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points)

56
{

57
	u32 leds;

58


59
	leds = asb2364_led_hex_tbl[(val/1000) % 10];

60
	leds <<= 8;

61
	leds |= asb2364_led_hex_tbl[(val/100) % 10];

62
	leds <<= 8;

63
	leds |= asb2364_led_hex_tbl[(val/10) % 10];

64
	leds <<= 8;

65
	leds |= asb2364_led_hex_tbl[val % 10];

66
	leds |= points^0x01010101;

67


68
	ASB2364_7SEGLEDS = leds;

69
}

70


71
/* display triple horizontal bar and exception code */

72
void peripheral_leds_display_exception(enum exception_code code)

73
{

74
	u32 leds;

75


76
	leds = asb2364_led_hex_tbl[(code/0x100) % 0x10];

77
	leds <<= 8;

78
	leds |= asb2364_led_hex_tbl[(code/0x10) % 0x10];

79
	leds <<= 8;

80
	leds |= asb2364_led_hex_tbl[code % 0x10];

81
	leds |= 0x6d010101;

82


83
	ASB2364_7SEGLEDS = leds;

84
}

85


86
void peripheral_leds_led_chase(void)

87
{

88
	ASB2364_7SEGLEDS = asb2364_led_chase_tbl[asb2364_led_chase];

89
	asb2364_led_chase++;

90
	if (asb2364_led_chase >= 6)

91
		asb2364_led_chase = 0;

92
}

93
#else  /* MN10300_USE_7SEGLEDS */

94
void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points) { }

95
void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points) { }

96
void peripheral_leds_display_exception(enum exception_code code) { }

97
void peripheral_leds_led_chase(void) { }

98
#endif /* MN10300_USE_7SEGLEDS */

99


100