240 lines
6.6 KiB
C
240 lines
6.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* JZ4780 timer
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*
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* Copyright (c) 2013 Imagination Technologies
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* Author: Paul Burton <paul.burton@imgtec.com>
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*/
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#include <config.h>
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#include <common.h>
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#include <div64.h>
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#include <asm/io.h>
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#include <asm/mipsregs.h>
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#include <mach/jz4780.h>
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#define TCU_TSR 0x1C /* Timer Stop Register */
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#define TCU_TSSR 0x2C /* Timer Stop Set Register */
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#define TCU_TSCR 0x3C /* Timer Stop Clear Register */
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#define TCU_TER 0x10 /* Timer Counter Enable Register */
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#define TCU_TESR 0x14 /* Timer Counter Enable Set Register */
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#define TCU_TECR 0x18 /* Timer Counter Enable Clear Register */
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#define TCU_TFR 0x20 /* Timer Flag Register */
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#define TCU_TFSR 0x24 /* Timer Flag Set Register */
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#define TCU_TFCR 0x28 /* Timer Flag Clear Register */
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#define TCU_TMR 0x30 /* Timer Mask Register */
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#define TCU_TMSR 0x34 /* Timer Mask Set Register */
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#define TCU_TMCR 0x38 /* Timer Mask Clear Register */
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/* n = 0,1,2,3,4,5 */
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#define TCU_TDFR(n) (0x40 + (n) * 0x10) /* Timer Data Full Reg */
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#define TCU_TDHR(n) (0x44 + (n) * 0x10) /* Timer Data Half Reg */
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#define TCU_TCNT(n) (0x48 + (n) * 0x10) /* Timer Counter Reg */
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#define TCU_TCSR(n) (0x4C + (n) * 0x10) /* Timer Control Reg */
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#define TCU_OSTCNTL 0xe4
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#define TCU_OSTCNTH 0xe8
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#define TCU_OSTCSR 0xec
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#define TCU_OSTCNTHBUF 0xfc
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/* Register definitions */
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#define TCU_TCSR_PWM_SD BIT(9)
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#define TCU_TCSR_PWM_INITL_HIGH BIT(8)
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#define TCU_TCSR_PWM_EN BIT(7)
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#define TCU_TCSR_PRESCALE_BIT 3
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#define TCU_TCSR_PRESCALE_MASK (0x7 << TCU_TCSR_PRESCALE_BIT)
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#define TCU_TCSR_PRESCALE1 (0x0 << TCU_TCSR_PRESCALE_BIT)
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#define TCU_TCSR_PRESCALE4 (0x1 << TCU_TCSR_PRESCALE_BIT)
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#define TCU_TCSR_PRESCALE16 (0x2 << TCU_TCSR_PRESCALE_BIT)
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#define TCU_TCSR_PRESCALE64 (0x3 << TCU_TCSR_PRESCALE_BIT)
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#define TCU_TCSR_PRESCALE256 (0x4 << TCU_TCSR_PRESCALE_BIT)
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#define TCU_TCSR_PRESCALE1024 (0x5 << TCU_TCSR_PRESCALE_BIT)
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#define TCU_TCSR_EXT_EN BIT(2)
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#define TCU_TCSR_RTC_EN BIT(1)
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#define TCU_TCSR_PCK_EN BIT(0)
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#define TCU_TER_TCEN5 BIT(5)
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#define TCU_TER_TCEN4 BIT(4)
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#define TCU_TER_TCEN3 BIT(3)
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#define TCU_TER_TCEN2 BIT(2)
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#define TCU_TER_TCEN1 BIT(1)
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#define TCU_TER_TCEN0 BIT(0)
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#define TCU_TESR_TCST5 BIT(5)
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#define TCU_TESR_TCST4 BIT(4)
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#define TCU_TESR_TCST3 BIT(3)
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#define TCU_TESR_TCST2 BIT(2)
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#define TCU_TESR_TCST1 BIT(1)
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#define TCU_TESR_TCST0 BIT(0)
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#define TCU_TECR_TCCL5 BIT(5)
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#define TCU_TECR_TCCL4 BIT(4)
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#define TCU_TECR_TCCL3 BIT(3)
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#define TCU_TECR_TCCL2 BIT(2)
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#define TCU_TECR_TCCL1 BIT(1)
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#define TCU_TECR_TCCL0 BIT(0)
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#define TCU_TFR_HFLAG5 BIT(21)
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#define TCU_TFR_HFLAG4 BIT(20)
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#define TCU_TFR_HFLAG3 BIT(19)
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#define TCU_TFR_HFLAG2 BIT(18)
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#define TCU_TFR_HFLAG1 BIT(17)
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#define TCU_TFR_HFLAG0 BIT(16)
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#define TCU_TFR_FFLAG5 BIT(5)
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#define TCU_TFR_FFLAG4 BIT(4)
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#define TCU_TFR_FFLAG3 BIT(3)
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#define TCU_TFR_FFLAG2 BIT(2)
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#define TCU_TFR_FFLAG1 BIT(1)
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#define TCU_TFR_FFLAG0 BIT(0)
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#define TCU_TFSR_HFLAG5 BIT(21)
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#define TCU_TFSR_HFLAG4 BIT(20)
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#define TCU_TFSR_HFLAG3 BIT(19)
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#define TCU_TFSR_HFLAG2 BIT(18)
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#define TCU_TFSR_HFLAG1 BIT(17)
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#define TCU_TFSR_HFLAG0 BIT(16)
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#define TCU_TFSR_FFLAG5 BIT(5)
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#define TCU_TFSR_FFLAG4 BIT(4)
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#define TCU_TFSR_FFLAG3 BIT(3)
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#define TCU_TFSR_FFLAG2 BIT(2)
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#define TCU_TFSR_FFLAG1 BIT(1)
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#define TCU_TFSR_FFLAG0 BIT(0)
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#define TCU_TFCR_HFLAG5 BIT(21)
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#define TCU_TFCR_HFLAG4 BIT(20)
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#define TCU_TFCR_HFLAG3 BIT(19)
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#define TCU_TFCR_HFLAG2 BIT(18)
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#define TCU_TFCR_HFLAG1 BIT(17)
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#define TCU_TFCR_HFLAG0 BIT(16)
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#define TCU_TFCR_FFLAG5 BIT(5)
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#define TCU_TFCR_FFLAG4 BIT(4)
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#define TCU_TFCR_FFLAG3 BIT(3)
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#define TCU_TFCR_FFLAG2 BIT(2)
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#define TCU_TFCR_FFLAG1 BIT(1)
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#define TCU_TFCR_FFLAG0 BIT(0)
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#define TCU_TMR_HMASK5 BIT(21)
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#define TCU_TMR_HMASK4 BIT(20)
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#define TCU_TMR_HMASK3 BIT(19)
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#define TCU_TMR_HMASK2 BIT(18)
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#define TCU_TMR_HMASK1 BIT(17)
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#define TCU_TMR_HMASK0 BIT(16)
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#define TCU_TMR_FMASK5 BIT(5)
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#define TCU_TMR_FMASK4 BIT(4)
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#define TCU_TMR_FMASK3 BIT(3)
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#define TCU_TMR_FMASK2 BIT(2)
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#define TCU_TMR_FMASK1 BIT(1)
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#define TCU_TMR_FMASK0 BIT(0)
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#define TCU_TMSR_HMST5 BIT(21)
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#define TCU_TMSR_HMST4 BIT(20)
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#define TCU_TMSR_HMST3 BIT(19)
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#define TCU_TMSR_HMST2 BIT(18)
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#define TCU_TMSR_HMST1 BIT(17)
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#define TCU_TMSR_HMST0 BIT(16)
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#define TCU_TMSR_FMST5 BIT(5)
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#define TCU_TMSR_FMST4 BIT(4)
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#define TCU_TMSR_FMST3 BIT(3)
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#define TCU_TMSR_FMST2 BIT(2)
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#define TCU_TMSR_FMST1 BIT(1)
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#define TCU_TMSR_FMST0 BIT(0)
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#define TCU_TMCR_HMCL5 BIT(21)
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#define TCU_TMCR_HMCL4 BIT(20)
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#define TCU_TMCR_HMCL3 BIT(19)
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#define TCU_TMCR_HMCL2 BIT(18)
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#define TCU_TMCR_HMCL1 BIT(17)
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#define TCU_TMCR_HMCL0 BIT(16)
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#define TCU_TMCR_FMCL5 BIT(5)
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#define TCU_TMCR_FMCL4 BIT(4)
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#define TCU_TMCR_FMCL3 BIT(3)
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#define TCU_TMCR_FMCL2 BIT(2)
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#define TCU_TMCR_FMCL1 BIT(1)
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#define TCU_TMCR_FMCL0 BIT(0)
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#define TCU_TSR_WDTS BIT(16)
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#define TCU_TSR_STOP5 BIT(5)
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#define TCU_TSR_STOP4 BIT(4)
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#define TCU_TSR_STOP3 BIT(3)
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#define TCU_TSR_STOP2 BIT(2)
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#define TCU_TSR_STOP1 BIT(1)
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#define TCU_TSR_STOP0 BIT(0)
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#define TCU_TSSR_WDTSS BIT(16)
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#define TCU_TSSR_STPS5 BIT(5)
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#define TCU_TSSR_STPS4 BIT(4)
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#define TCU_TSSR_STPS3 BIT(3)
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#define TCU_TSSR_STPS2 BIT(2)
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#define TCU_TSSR_STPS1 BIT(1)
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#define TCU_TSSR_STPS0 BIT(0)
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#define TCU_TSSR_WDTSC BIT(16)
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#define TCU_TSSR_STPC5 BIT(5)
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#define TCU_TSSR_STPC4 BIT(4)
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#define TCU_TSSR_STPC3 BIT(3)
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#define TCU_TSSR_STPC2 BIT(2)
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#define TCU_TSSR_STPC1 BIT(1)
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#define TCU_TSSR_STPC0 BIT(0)
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#define TER_OSTEN BIT(15)
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#define OSTCSR_CNT_MD BIT(15)
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#define OSTCSR_SD BIT(9)
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#define OSTCSR_PRESCALE_16 (0x2 << 3)
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#define OSTCSR_EXT_EN BIT(2)
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int timer_init(void)
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{
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void __iomem *regs = (void __iomem *)TCU_BASE;
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writel(OSTCSR_SD, regs + TCU_OSTCSR);
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reset_timer();
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writel(OSTCSR_CNT_MD | OSTCSR_EXT_EN | OSTCSR_PRESCALE_16,
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regs + TCU_OSTCSR);
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writew(TER_OSTEN, regs + TCU_TESR);
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return 0;
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}
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void reset_timer(void)
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{
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void __iomem *regs = (void __iomem *)TCU_BASE;
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writel(0, regs + TCU_OSTCNTH);
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writel(0, regs + TCU_OSTCNTL);
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}
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static u64 get_timer64(void)
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{
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void __iomem *regs = (void __iomem *)TCU_BASE;
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u32 low = readl(regs + TCU_OSTCNTL);
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u32 high = readl(regs + TCU_OSTCNTHBUF);
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return ((u64)high << 32) | low;
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}
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ulong get_timer(ulong base)
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{
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return lldiv(get_timer64(), 3000) - base;
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}
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void __udelay(unsigned long usec)
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{
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/* OST count increments at 3MHz */
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u64 end = get_timer64() + ((u64)usec * 3);
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while (get_timer64() < end)
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;
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}
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unsigned long long get_ticks(void)
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{
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return get_timer64();
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}
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void jz4780_tcu_wdt_start(void)
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{
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void __iomem *tcu_regs = (void __iomem *)TCU_BASE;
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/* Enable WDT clock */
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writel(TCU_TSSR_WDTSC, tcu_regs + TCU_TSCR);
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}
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