| /* |
| * Copyright (C) 2018 Synaptics Incorporated. All rights reserved. |
| * (C) Copyright 2010 Marvell Semiconductor <www.marvell.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * INFORMATION CONTAINED IN THIS DOCUMENT IS PROVIDED "AS-IS," AND |
| * SYNAPTICS EXPRESSLY DISCLAIMS ALL EXPRESS AND IMPLIED WARRANTIES, |
| * INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE, AND ANY WARRANTIES OF NON-INFRINGEMENT OF ANY |
| * INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT SHALL SYNAPTICS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, PUNITIVE, OR |
| * CONSEQUENTIAL DAMAGES ARISING OUT OF OR IN CONNECTION WITH THE USE |
| * OF THE INFORMATION CONTAINED IN THIS DOCUMENT, HOWEVER CAUSED AND |
| * BASED ON ANY THEORY OF LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * NEGLIGENCE OR OTHER TORTIOUS ACTION, AND EVEN IF SYNAPTICS WAS |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. IF A TRIBUNAL OF |
| * COMPETENT JURISDICTION DOES NOT PERMIT THE DISCLAIMER OF DIRECT |
| * DAMAGES OR ANY OTHER DAMAGES, SYNAPTICS' TOTAL CUMULATIVE LIABILITY |
| * TO ANY PARTY SHALL NOT EXCEED ONE HUNDRED U.S. DOLLARS. |
| */ |
| |
| #include "apb_timer.h" |
| #include "timer.h" |
| |
| unsigned int timer_clk_freq; |
| static inline unsigned long read_timer(void) |
| { |
| return TIMERx_GetCurrentValue(GALOIS_UBOOT_TIMER) \ |
| / (timer_clk_freq/ 1000); |
| } |
| |
| static unsigned long timestamp; |
| static unsigned long lastdec; |
| |
| void reset_timer_masked (void) |
| { |
| /* reset time */ |
| lastdec = read_timer(); /* capure current decrementer value time */ |
| timestamp = 0; /* start "advancing" time stamp from 0 */ |
| } |
| |
| unsigned long get_timer_masked (void) |
| { |
| unsigned long now = read_timer(); |
| |
| if (lastdec >= now) { |
| /* normal mode */ |
| timestamp += lastdec - now; |
| } else { |
| /* we have an overflow ... */ |
| timestamp += lastdec + |
| (TIMER_LOAD_VAL / (timer_clk_freq/ 1000)) - now; |
| } |
| lastdec = now; |
| |
| return timestamp; |
| } |
| |
| /* |
| * timer without interrupts |
| */ |
| |
| void reset_timer (void) |
| { |
| reset_timer_masked (); |
| } |
| |
| unsigned long get_timer (unsigned long base) |
| { |
| return get_timer_masked () - base; |
| } |
| |
| void set_timer (unsigned long t) |
| { |
| timestamp = t; |
| } |
| |
| static inline unsigned long uboot_cntr_val(void) |
| { |
| return TIMERx_GetCurrentValue(GALOIS_UBOOT_TIMER); |
| } |
| |
| void __udelay(unsigned long usec) |
| { |
| unsigned int current; |
| unsigned long delayticks; |
| |
| current = uboot_cntr_val(); |
| delayticks = (usec * (timer_clk_freq/ 1000000)); |
| |
| if (current < delayticks) { |
| delayticks -= current; |
| while (uboot_cntr_val() < current) |
| ; |
| while ((TIMER_LOAD_VAL - delayticks) < uboot_cntr_val()) |
| ; |
| } else { |
| while (uboot_cntr_val() > (current - delayticks)) |
| ; |
| } |
| } |
| #ifndef CONFIG_WD_PERIOD |
| # define CONFIG_WD_PERIOD (10 * 1000 * 1000) /* 10 seconds default*/ |
| #endif |
| void udelay(unsigned long usec) |
| { |
| unsigned long kv; |
| |
| do { |
| |
| kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec; |
| __udelay (kv); |
| usec -= kv; |
| } while(usec); |
| } |
| |
| void delay_us(unsigned int us) |
| { |
| udelay(us); |
| } |
| |
| void mdelay(unsigned int ms) |
| { |
| const unsigned int step_ms = 1000000; |
| const unsigned int step_us = 1000 * step_ms; |
| while (ms > step_ms) { |
| udelay(step_us); |
| ms -= step_ms; |
| } |
| if (ms) |
| udelay(1000 * ms); |
| } |
| void delay_ms(unsigned int ms) |
| { |
| mdelay(ms); |
| } |
| |
| #define INT_UNMASK_BIT 0 |
| #define INT_MASK_BIT 1 |
| #define INT_ENABLE_BIT 1 |
| #define INT_DISABLE_BIT 0 |
| |
| int timer_init (void) |
| { |
| /* call low level code to init timer, TODO: don't include low level code like this */ |
| TIMERx_SetControlReg(GALOIS_UBOOT_TIMER, INT_MASK_BIT, INT_DISABLE_BIT, TIMER_USR_DEFINED_MODE); |
| TIMERx_SetLoadCount(GALOIS_UBOOT_TIMER, TIMER_LOAD_VAL); |
| /* INT_ENABLE_BIT is mis-name of ENABLE_BIT */ |
| TIMERx_SetIntEn(GALOIS_UBOOT_TIMER, INT_ENABLE_BIT); |
| |
| /* init the timestamp and lastdec value */ |
| reset_timer_masked(); |
| |
| #if 0 //(ASIC_PLATFORM) |
| timer_clk_freq = 1000000*GaloisGetFrequency(SOC_FREQ_CFG); |
| printf("timer_clk_freq = 0x%x \n",timer_clk_freq); |
| #else |
| timer_clk_freq = CONFIG_SYS_HZ; |
| #endif |
| //printf("timer_clk_freq = 0x%08x \n",timer_clk_freq); |
| |
| return 0; |
| } |
| int timer_stop(void) |
| { |
| TIMERx_SetIntEn(GALOIS_UBOOT_TIMER, INT_DISABLE_BIT); |
| return 0; |
| } |