Move the timer code from interrupts.c into timer.c . Eliminate the installation of timer interrupt handler, which is no longer used. Signed-off-by: Marek Vasut <marex@denx.de> Signed-off-by: Thomas Chou <thomas@wytron.com.tw>master
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/*
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* (C) Copyright 2000-2002 |
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
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* |
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* (C) Copyright 2004, Psyent Corporation <www.psyent.com> |
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* Scott McNutt <smcnutt@psyent.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 <asm/nios2.h> |
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#include <asm/types.h> |
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#include <asm/io.h> |
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struct nios_timer { |
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u32 status; /* Timer status reg */ |
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u32 control; /* Timer control reg */ |
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u32 periodl; /* Timeout period low */ |
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u32 periodh; /* Timeout period high */ |
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u32 snapl; /* Snapshot low */ |
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u32 snaph; /* Snapshot high */ |
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}; |
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/* status register */ |
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#define NIOS_TIMER_TO (1 << 0) /* Timeout */ |
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#define NIOS_TIMER_RUN (1 << 1) /* Timer running */ |
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/* control register */ |
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#define NIOS_TIMER_ITO (1 << 0) /* Timeout interrupt enable */ |
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#define NIOS_TIMER_CONT (1 << 1) /* Continuous mode */ |
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#define NIOS_TIMER_START (1 << 2) /* Start timer */ |
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#define NIOS_TIMER_STOP (1 << 3) /* Stop timer */ |
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/*************************************************************************/ |
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unsigned long notrace timer_read_counter(void) |
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{ |
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struct nios_timer *tmr = (struct nios_timer *)CONFIG_SYS_TIMER_BASE; |
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u32 val; |
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/* Trigger update */ |
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writel(0x0, &tmr->snapl); |
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/* Read timer value */ |
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val = readl(&tmr->snapl) & 0xffff; |
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val |= (readl(&tmr->snaph) & 0xffff) << 16; |
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return ~val; |
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} |
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int timer_init(void) |
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{ |
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struct nios_timer *tmr = (struct nios_timer *)CONFIG_SYS_TIMER_BASE; |
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writel(0, &tmr->status); |
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writel(0, &tmr->control); |
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writel(NIOS_TIMER_STOP, &tmr->control); |
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writel(0xffff, &tmr->periodl); |
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writel(0xffff, &tmr->periodh); |
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writel(NIOS_TIMER_CONT | NIOS_TIMER_START, &tmr->control); |
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return 0; |
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} |
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