1/* ASB2305 Peripheral 7-segment LEDs x4 support 2 * 3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public Licence 8 * as published by the Free Software Foundation; either version 9 * 2 of the Licence, or (at your option) any later version. 10 */ 11#include <linux/kernel.h> 12#include <linux/param.h> 13#include <linux/init.h> 14#include <asm/io.h> 15#include <asm/processor.h> 16#include <asm/intctl-regs.h> 17#include <asm/rtc-regs.h> 18#include <unit/leds.h> 19 20static const u8 asb2305_led_hex_tbl[16] = { 21 0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0, 22 0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c 23}; 24 25static const u32 asb2305_led_chase_tbl[6] = { 26 ~0x02020202, /* top - segA */ 27 ~0x04040404, /* right top - segB */ 28 ~0x08080808, /* right bottom - segC */ 29 ~0x10101010, /* bottom - segD */ 30 ~0x20202020, /* left bottom - segE */ 31 ~0x40404040, /* left top - segF */ 32}; 33 34static unsigned asb2305_led_chase; 35 36void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points) 37{ 38 u32 leds; 39 40 leds = asb2305_led_hex_tbl[(val/1000) % 10]; 41 leds <<= 8; 42 leds |= asb2305_led_hex_tbl[(val/100) % 10]; 43 leds <<= 8; 44 leds |= asb2305_led_hex_tbl[(val/10) % 10]; 45 leds <<= 8; 46 leds |= asb2305_led_hex_tbl[val % 10]; 47 leds |= points^0x01010101; 48 49 ASB2305_7SEGLEDS = leds; 50} 51 52void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points) 53{ 54 u32 leds; 55 56 leds = asb2305_led_hex_tbl[(val/1000) % 10]; 57 leds <<= 8; 58 leds |= asb2305_led_hex_tbl[(val/100) % 10]; 59 leds <<= 8; 60 leds |= asb2305_led_hex_tbl[(val/10) % 10]; 61 leds <<= 8; 62 leds |= asb2305_led_hex_tbl[val % 10]; 63 leds |= points^0x01010101; 64 65 ASB2305_7SEGLEDS = leds; 66} 67 68void peripheral_leds_display_exception(enum exception_code code) 69{ 70 u32 leds; 71 72 leds = asb2305_led_hex_tbl[(code/0x100) % 0x10]; 73 leds <<= 8; 74 leds |= asb2305_led_hex_tbl[(code/0x10) % 0x10]; 75 leds <<= 8; 76 leds |= asb2305_led_hex_tbl[code % 0x10]; 77 leds |= 0x6d010101; 78 79 ASB2305_7SEGLEDS = leds; 80} 81 82void peripheral_leds7x4_display_minssecs(unsigned int time, unsigned int points) 83{ 84 u32 leds; 85 86 leds = asb2305_led_hex_tbl[(time/600) % 6]; 87 leds <<= 8; 88 leds |= asb2305_led_hex_tbl[(time/60) % 10]; 89 leds <<= 8; 90 leds |= asb2305_led_hex_tbl[(time/10) % 6]; 91 leds <<= 8; 92 leds |= asb2305_led_hex_tbl[time % 10]; 93 leds |= points^0x01010101; 94 95 ASB2305_7SEGLEDS = leds; 96} 97 98void peripheral_leds7x4_display_rtc(void) 99{ 100 unsigned int clock; 101 u8 mins, secs; 102 103 mins = RTMCR; 104 secs = RTSCR; 105 106 clock = ((mins & 0xf0) >> 4); 107 clock *= 10; 108 clock += (mins & 0x0f); 109 clock *= 6; 110 111 clock += ((secs & 0xf0) >> 4); 112 clock *= 10; 113 clock += (secs & 0x0f); 114 115 peripheral_leds7x4_display_minssecs(clock, 0); 116} 117 118void peripheral_leds_led_chase(void) 119{ 120 ASB2305_7SEGLEDS = asb2305_led_chase_tbl[asb2305_led_chase]; 121 asb2305_led_chase++; 122 if (asb2305_led_chase >= 6) 123 asb2305_led_chase = 0; 124} 125