2 * Copyright (C) 2010 Albert ARIBAUD <albert.u.boot@aribaud.net>
4 * Based on original Kirkwood support which is
5 * Copyright (C) Marvell International Ltd. and its affiliates
6 * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
8 * SPDX-License-Identifier: GPL-2.0+
14 #define UBOOT_CNTR 0 /* counter to use for uboot timer */
16 /* Timer reload and current value registers */
17 struct orion5x_tmr_val {
18 u32 reload; /* Timer reload reg */
19 u32 val; /* Timer value reg */
23 struct orion5x_tmr_registers {
24 u32 ctrl; /* Timer control reg */
26 struct orion5x_tmr_val tmr[2];
31 struct orion5x_tmr_registers *orion5x_tmr_regs =
32 (struct orion5x_tmr_registers *)ORION5X_TIMER_BASE;
35 * ARM Timers Registers Map
37 #define CNTMR_CTRL_REG (&orion5x_tmr_regs->ctrl)
38 #define CNTMR_RELOAD_REG(tmrnum) (&orion5x_tmr_regs->tmr[tmrnum].reload)
39 #define CNTMR_VAL_REG(tmrnum) (&orion5x_tmr_regs->tmr[tmrnum].val)
42 * ARM Timers Control Register
43 * CPU_TIMERS_CTRL_REG (CTCR)
45 #define CTCR_ARM_TIMER_EN_OFFS(cntr) (cntr * 2)
46 #define CTCR_ARM_TIMER_EN_MASK(cntr) (1 << CTCR_ARM_TIMER_EN_OFFS)
47 #define CTCR_ARM_TIMER_EN(cntr) (1 << CTCR_ARM_TIMER_EN_OFFS(cntr))
48 #define CTCR_ARM_TIMER_DIS(cntr) (0 << CTCR_ARM_TIMER_EN_OFFS(cntr))
50 #define CTCR_ARM_TIMER_AUTO_OFFS(cntr) ((cntr * 2) + 1)
51 #define CTCR_ARM_TIMER_AUTO_MASK(cntr) (1 << 1)
52 #define CTCR_ARM_TIMER_AUTO_EN(cntr) (1 << CTCR_ARM_TIMER_AUTO_OFFS(cntr))
53 #define CTCR_ARM_TIMER_AUTO_DIS(cntr) (0 << CTCR_ARM_TIMER_AUTO_OFFS(cntr))
56 * ARM Timer\Watchdog Reload Register
57 * CNTMR_RELOAD_REG (TRR)
59 #define TRG_ARM_TIMER_REL_OFFS 0
60 #define TRG_ARM_TIMER_REL_MASK 0xffffffff
63 * ARM Timer\Watchdog Register
64 * CNTMR_VAL_REG (TVRG)
66 #define TVR_ARM_TIMER_OFFS 0
67 #define TVR_ARM_TIMER_MASK 0xffffffff
68 #define TVR_ARM_TIMER_MAX 0xffffffff
69 #define TIMER_LOAD_VAL 0xffffffff
71 static inline ulong read_timer(void)
73 return readl(CNTMR_VAL_REG(UBOOT_CNTR))
74 / (CONFIG_SYS_TCLK / 1000);
77 DECLARE_GLOBAL_DATA_PTR;
79 #define timestamp gd->arch.tbl
80 #define lastdec gd->arch.lastinc
82 ulong get_timer_masked(void)
84 ulong now = read_timer();
88 timestamp += lastdec - now;
90 /* we have an overflow ... */
91 timestamp += lastdec +
92 (TIMER_LOAD_VAL / (CONFIG_SYS_TCLK / 1000)) - now;
99 ulong get_timer(ulong base)
101 return get_timer_masked() - base;
104 static inline ulong uboot_cntr_val(void)
106 return readl(CNTMR_VAL_REG(UBOOT_CNTR));
109 void __udelay(unsigned long usec)
114 current = uboot_cntr_val();
115 delayticks = (usec * (CONFIG_SYS_TCLK / 1000000));
117 if (current < delayticks) {
118 delayticks -= current;
119 while (uboot_cntr_val() < current)
121 while ((TIMER_LOAD_VAL - delayticks) < uboot_cntr_val())
124 while (uboot_cntr_val() > (current - delayticks))
134 unsigned int cntmrctrl;
136 /* load value into timer */
137 writel(TIMER_LOAD_VAL, CNTMR_RELOAD_REG(UBOOT_CNTR));
138 writel(TIMER_LOAD_VAL, CNTMR_VAL_REG(UBOOT_CNTR));
140 /* enable timer in auto reload mode */
141 cntmrctrl = readl(CNTMR_CTRL_REG);
142 cntmrctrl |= CTCR_ARM_TIMER_EN(UBOOT_CNTR);
143 cntmrctrl |= CTCR_ARM_TIMER_AUTO_EN(UBOOT_CNTR);
144 writel(cntmrctrl, CNTMR_CTRL_REG);
148 void timer_init_r(void)
150 /* init the timestamp and lastdec value */
151 lastdec = read_timer();
156 * This function is derived from PowerPC code (read timebase as long long).
157 * On ARM it just returns the timer value.
159 unsigned long long get_ticks(void)
165 * This function is derived from PowerPC code (timebase clock frequency).
166 * On ARM it returns the number of timer ticks per second.
168 ulong get_tbclk (void)
170 return (ulong)CONFIG_SYS_HZ;