diff options
Diffstat (limited to 'arch/mn10300/unit-asb2364/leds.c')
| -rw-r--r-- | arch/mn10300/unit-asb2364/leds.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/mn10300/unit-asb2364/leds.c b/arch/mn10300/unit-asb2364/leds.c new file mode 100644 index 0000000..1ff830c --- /dev/null +++ b/arch/mn10300/unit-asb2364/leds.c @@ -0,0 +1,98 @@ +/* leds.c: ASB2364 peripheral 7seg LEDs x4 support + * + * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/init.h> + +#include <asm/io.h> +#include <asm/processor.h> +#include <asm/intctl-regs.h> +#include <asm/rtc-regs.h> +#include <unit/leds.h> + +#if MN10300_USE_7SEGLEDS +static const u8 asb2364_led_hex_tbl[16] = { + 0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0, + 0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c +}; + +static const u32 asb2364_led_chase_tbl[6] = { + ~0x02020202, /* top - segA */ + ~0x04040404, /* right top - segB */ + ~0x08080808, /* right bottom - segC */ + ~0x10101010, /* bottom - segD */ + ~0x20202020, /* left bottom - segE */ + ~0x40404040, /* left top - segF */ +}; + +static unsigned asb2364_led_chase; + +void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points) +{ + u32 leds; + + leds = asb2364_led_hex_tbl[(val/1000) % 10]; + leds <<= 8; + leds |= asb2364_led_hex_tbl[(val/100) % 10]; + leds <<= 8; + leds |= asb2364_led_hex_tbl[(val/10) % 10]; + leds <<= 8; + leds |= asb2364_led_hex_tbl[val % 10]; + leds |= points^0x01010101; + + ASB2364_7SEGLEDS = leds; +} + +void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points) +{ + u32 leds; + + leds = asb2364_led_hex_tbl[(val/1000) % 10]; + leds <<= 8; + leds |= asb2364_led_hex_tbl[(val/100) % 10]; + leds <<= 8; + leds |= asb2364_led_hex_tbl[(val/10) % 10]; + leds <<= 8; + leds |= asb2364_led_hex_tbl[val % 10]; + leds |= points^0x01010101; + + ASB2364_7SEGLEDS = leds; +} + +/* display triple horizontal bar and exception code */ +void peripheral_leds_display_exception(enum exception_code code) +{ + u32 leds; + + leds = asb2364_led_hex_tbl[(code/0x100) % 0x10]; + leds <<= 8; + leds |= asb2364_led_hex_tbl[(code/0x10) % 0x10]; + leds <<= 8; + leds |= asb2364_led_hex_tbl[code % 0x10]; + leds |= 0x6d010101; + + ASB2364_7SEGLEDS = leds; +} + +void peripheral_leds_led_chase(void) +{ + ASB2364_7SEGLEDS = asb2364_led_chase_tbl[asb2364_led_chase]; + asb2364_led_chase++; + if (asb2364_led_chase >= 6) + asb2364_led_chase = 0; +} +#else /* MN10300_USE_7SEGLEDS */ +void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points) { } +void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points) { } +void peripheral_leds_display_exception(enum exception_code code) { } +void peripheral_leds_led_chase(void) { } +#endif /* MN10300_USE_7SEGLEDS */ |
