1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * JZ4780 timer 4 * 5 * Copyright (c) 2013 Imagination Technologies 6 * Author: Paul Burton <paul.burton@imgtec.com> 7 */ 8 9#include <config.h> 10#include <common.h> 11#include <div64.h> 12#include <asm/io.h> 13#include <asm/mipsregs.h> 14#include <mach/jz4780.h> 15 16#define TCU_TSR 0x1C /* Timer Stop Register */ 17#define TCU_TSSR 0x2C /* Timer Stop Set Register */ 18#define TCU_TSCR 0x3C /* Timer Stop Clear Register */ 19#define TCU_TER 0x10 /* Timer Counter Enable Register */ 20#define TCU_TESR 0x14 /* Timer Counter Enable Set Register */ 21#define TCU_TECR 0x18 /* Timer Counter Enable Clear Register */ 22#define TCU_TFR 0x20 /* Timer Flag Register */ 23#define TCU_TFSR 0x24 /* Timer Flag Set Register */ 24#define TCU_TFCR 0x28 /* Timer Flag Clear Register */ 25#define TCU_TMR 0x30 /* Timer Mask Register */ 26#define TCU_TMSR 0x34 /* Timer Mask Set Register */ 27#define TCU_TMCR 0x38 /* Timer Mask Clear Register */ 28/* n = 0,1,2,3,4,5 */ 29#define TCU_TDFR(n) (0x40 + (n) * 0x10) /* Timer Data Full Reg */ 30#define TCU_TDHR(n) (0x44 + (n) * 0x10) /* Timer Data Half Reg */ 31#define TCU_TCNT(n) (0x48 + (n) * 0x10) /* Timer Counter Reg */ 32#define TCU_TCSR(n) (0x4C + (n) * 0x10) /* Timer Control Reg */ 33 34#define TCU_OSTCNTL 0xe4 35#define TCU_OSTCNTH 0xe8 36#define TCU_OSTCSR 0xec 37#define TCU_OSTCNTHBUF 0xfc 38 39/* Register definitions */ 40#define TCU_TCSR_PWM_SD BIT(9) 41#define TCU_TCSR_PWM_INITL_HIGH BIT(8) 42#define TCU_TCSR_PWM_EN BIT(7) 43#define TCU_TCSR_PRESCALE_BIT 3 44#define TCU_TCSR_PRESCALE_MASK (0x7 << TCU_TCSR_PRESCALE_BIT) 45#define TCU_TCSR_PRESCALE1 (0x0 << TCU_TCSR_PRESCALE_BIT) 46#define TCU_TCSR_PRESCALE4 (0x1 << TCU_TCSR_PRESCALE_BIT) 47#define TCU_TCSR_PRESCALE16 (0x2 << TCU_TCSR_PRESCALE_BIT) 48#define TCU_TCSR_PRESCALE64 (0x3 << TCU_TCSR_PRESCALE_BIT) 49#define TCU_TCSR_PRESCALE256 (0x4 << TCU_TCSR_PRESCALE_BIT) 50#define TCU_TCSR_PRESCALE1024 (0x5 << TCU_TCSR_PRESCALE_BIT) 51#define TCU_TCSR_EXT_EN BIT(2) 52#define TCU_TCSR_RTC_EN BIT(1) 53#define TCU_TCSR_PCK_EN BIT(0) 54 55#define TCU_TER_TCEN5 BIT(5) 56#define TCU_TER_TCEN4 BIT(4) 57#define TCU_TER_TCEN3 BIT(3) 58#define TCU_TER_TCEN2 BIT(2) 59#define TCU_TER_TCEN1 BIT(1) 60#define TCU_TER_TCEN0 BIT(0) 61 62#define TCU_TESR_TCST5 BIT(5) 63#define TCU_TESR_TCST4 BIT(4) 64#define TCU_TESR_TCST3 BIT(3) 65#define TCU_TESR_TCST2 BIT(2) 66#define TCU_TESR_TCST1 BIT(1) 67#define TCU_TESR_TCST0 BIT(0) 68 69#define TCU_TECR_TCCL5 BIT(5) 70#define TCU_TECR_TCCL4 BIT(4) 71#define TCU_TECR_TCCL3 BIT(3) 72#define TCU_TECR_TCCL2 BIT(2) 73#define TCU_TECR_TCCL1 BIT(1) 74#define TCU_TECR_TCCL0 BIT(0) 75 76#define TCU_TFR_HFLAG5 BIT(21) 77#define TCU_TFR_HFLAG4 BIT(20) 78#define TCU_TFR_HFLAG3 BIT(19) 79#define TCU_TFR_HFLAG2 BIT(18) 80#define TCU_TFR_HFLAG1 BIT(17) 81#define TCU_TFR_HFLAG0 BIT(16) 82#define TCU_TFR_FFLAG5 BIT(5) 83#define TCU_TFR_FFLAG4 BIT(4) 84#define TCU_TFR_FFLAG3 BIT(3) 85#define TCU_TFR_FFLAG2 BIT(2) 86#define TCU_TFR_FFLAG1 BIT(1) 87#define TCU_TFR_FFLAG0 BIT(0) 88 89#define TCU_TFSR_HFLAG5 BIT(21) 90#define TCU_TFSR_HFLAG4 BIT(20) 91#define TCU_TFSR_HFLAG3 BIT(19) 92#define TCU_TFSR_HFLAG2 BIT(18) 93#define TCU_TFSR_HFLAG1 BIT(17) 94#define TCU_TFSR_HFLAG0 BIT(16) 95#define TCU_TFSR_FFLAG5 BIT(5) 96#define TCU_TFSR_FFLAG4 BIT(4) 97#define TCU_TFSR_FFLAG3 BIT(3) 98#define TCU_TFSR_FFLAG2 BIT(2) 99#define TCU_TFSR_FFLAG1 BIT(1) 100#define TCU_TFSR_FFLAG0 BIT(0) 101 102#define TCU_TFCR_HFLAG5 BIT(21) 103#define TCU_TFCR_HFLAG4 BIT(20) 104#define TCU_TFCR_HFLAG3 BIT(19) 105#define TCU_TFCR_HFLAG2 BIT(18) 106#define TCU_TFCR_HFLAG1 BIT(17) 107#define TCU_TFCR_HFLAG0 BIT(16) 108#define TCU_TFCR_FFLAG5 BIT(5) 109#define TCU_TFCR_FFLAG4 BIT(4) 110#define TCU_TFCR_FFLAG3 BIT(3) 111#define TCU_TFCR_FFLAG2 BIT(2) 112#define TCU_TFCR_FFLAG1 BIT(1) 113#define TCU_TFCR_FFLAG0 BIT(0) 114 115#define TCU_TMR_HMASK5 BIT(21) 116#define TCU_TMR_HMASK4 BIT(20) 117#define TCU_TMR_HMASK3 BIT(19) 118#define TCU_TMR_HMASK2 BIT(18) 119#define TCU_TMR_HMASK1 BIT(17) 120#define TCU_TMR_HMASK0 BIT(16) 121#define TCU_TMR_FMASK5 BIT(5) 122#define TCU_TMR_FMASK4 BIT(4) 123#define TCU_TMR_FMASK3 BIT(3) 124#define TCU_TMR_FMASK2 BIT(2) 125#define TCU_TMR_FMASK1 BIT(1) 126#define TCU_TMR_FMASK0 BIT(0) 127 128#define TCU_TMSR_HMST5 BIT(21) 129#define TCU_TMSR_HMST4 BIT(20) 130#define TCU_TMSR_HMST3 BIT(19) 131#define TCU_TMSR_HMST2 BIT(18) 132#define TCU_TMSR_HMST1 BIT(17) 133#define TCU_TMSR_HMST0 BIT(16) 134#define TCU_TMSR_FMST5 BIT(5) 135#define TCU_TMSR_FMST4 BIT(4) 136#define TCU_TMSR_FMST3 BIT(3) 137#define TCU_TMSR_FMST2 BIT(2) 138#define TCU_TMSR_FMST1 BIT(1) 139#define TCU_TMSR_FMST0 BIT(0) 140 141#define TCU_TMCR_HMCL5 BIT(21) 142#define TCU_TMCR_HMCL4 BIT(20) 143#define TCU_TMCR_HMCL3 BIT(19) 144#define TCU_TMCR_HMCL2 BIT(18) 145#define TCU_TMCR_HMCL1 BIT(17) 146#define TCU_TMCR_HMCL0 BIT(16) 147#define TCU_TMCR_FMCL5 BIT(5) 148#define TCU_TMCR_FMCL4 BIT(4) 149#define TCU_TMCR_FMCL3 BIT(3) 150#define TCU_TMCR_FMCL2 BIT(2) 151#define TCU_TMCR_FMCL1 BIT(1) 152#define TCU_TMCR_FMCL0 BIT(0) 153 154#define TCU_TSR_WDTS BIT(16) 155#define TCU_TSR_STOP5 BIT(5) 156#define TCU_TSR_STOP4 BIT(4) 157#define TCU_TSR_STOP3 BIT(3) 158#define TCU_TSR_STOP2 BIT(2) 159#define TCU_TSR_STOP1 BIT(1) 160#define TCU_TSR_STOP0 BIT(0) 161 162#define TCU_TSSR_WDTSS BIT(16) 163#define TCU_TSSR_STPS5 BIT(5) 164#define TCU_TSSR_STPS4 BIT(4) 165#define TCU_TSSR_STPS3 BIT(3) 166#define TCU_TSSR_STPS2 BIT(2) 167#define TCU_TSSR_STPS1 BIT(1) 168#define TCU_TSSR_STPS0 BIT(0) 169 170#define TCU_TSSR_WDTSC BIT(16) 171#define TCU_TSSR_STPC5 BIT(5) 172#define TCU_TSSR_STPC4 BIT(4) 173#define TCU_TSSR_STPC3 BIT(3) 174#define TCU_TSSR_STPC2 BIT(2) 175#define TCU_TSSR_STPC1 BIT(1) 176#define TCU_TSSR_STPC0 BIT(0) 177 178#define TER_OSTEN BIT(15) 179 180#define OSTCSR_CNT_MD BIT(15) 181#define OSTCSR_SD BIT(9) 182#define OSTCSR_PRESCALE_16 (0x2 << 3) 183#define OSTCSR_EXT_EN BIT(2) 184 185int timer_init(void) 186{ 187 void __iomem *regs = (void __iomem *)TCU_BASE; 188 189 writel(OSTCSR_SD, regs + TCU_OSTCSR); 190 reset_timer(); 191 writel(OSTCSR_CNT_MD | OSTCSR_EXT_EN | OSTCSR_PRESCALE_16, 192 regs + TCU_OSTCSR); 193 writew(TER_OSTEN, regs + TCU_TESR); 194 return 0; 195} 196 197void reset_timer(void) 198{ 199 void __iomem *regs = (void __iomem *)TCU_BASE; 200 201 writel(0, regs + TCU_OSTCNTH); 202 writel(0, regs + TCU_OSTCNTL); 203} 204 205static u64 get_timer64(void) 206{ 207 void __iomem *regs = (void __iomem *)TCU_BASE; 208 u32 low = readl(regs + TCU_OSTCNTL); 209 u32 high = readl(regs + TCU_OSTCNTHBUF); 210 211 return ((u64)high << 32) | low; 212} 213 214ulong get_timer(ulong base) 215{ 216 return lldiv(get_timer64(), 3000) - base; 217} 218 219void __udelay(unsigned long usec) 220{ 221 /* OST count increments at 3MHz */ 222 u64 end = get_timer64() + ((u64)usec * 3); 223 224 while (get_timer64() < end) 225 ; 226} 227 228unsigned long long get_ticks(void) 229{ 230 return get_timer64(); 231} 232 233void jz4780_tcu_wdt_start(void) 234{ 235 void __iomem *tcu_regs = (void __iomem *)TCU_BASE; 236 237 /* Enable WDT clock */ 238 writel(TCU_TSSR_WDTSC, tcu_regs + TCU_TSCR); 239} 240