Messages in this thread Patch in this message |  | | | From | "Leo (Hao) Chen" <> | | Date | Fri, 3 Jul 2009 18:44:13 -0700 | | Subject | [PATCH v2 9/18] new ARM SoC support: BCMRing |
From b26374d35d7ffc2fe6512c90fffae59890ed46cb Mon Sep 17 00:00:00 2001 From: Leo Chen <leochen@broadcom.com> Date: Fri, 3 Jul 2009 17:04:06 -0700 Subject: [PATCH 09/18] add mach-bcmring timer.c
timer helper function, timer hardware register header file
Signed-off-by: Leo Chen <leochen@broadcom.com> --- arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h | 82 ++++++++++++++++++++ arch/arm/mach-bcmring/include/mach/timer.h | 77 ++++++++++++++++++ arch/arm/mach-bcmring/timer.c | 62 +++++++++++++++ 3 files changed, 221 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h create mode 100644 arch/arm/mach-bcmring/include/mach/timer.h create mode 100644 arch/arm/mach-bcmring/timer.c diff --git a/arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h b/arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h new file mode 100644 index 0000000..3080ac7 --- /dev/null +++ b/arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h @@ -0,0 +1,82 @@ +/***************************************************************************** +* Copyright 2004 - 2008 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +/****************************************************************************/ +/** +* @file tmrHw_reg.h +* +* @brief Definitions for low level Timer registers +* +*/ +/****************************************************************************/ +#ifndef _TMRHW_REG_H +#define _TMRHW_REG_H + +#include <mach/csp/mm_io.h> +#include <mach/csp/hw_cfg.h> +/* Base address */ +#define tmrHw_MODULE_BASE_ADDR MM_IO_BASE_TMR + +/* +This platform has four different timers running at different clock speed + +Timer one (Timer ID 0) runs at 25 MHz +Timer two (Timer ID 1) runs at 25 MHz +Timer three (Timer ID 2) runs at 150 MHz +Timer four (Timer ID 3) runs at 150 MHz +*/ +#define tmrHw_LOW_FREQUENCY_MHZ 25 /* Always 25MHz from XTAL */ +#define tmrHw_LOW_FREQUENCY_HZ 25000000 + +#if defined(CFG_GLOBAL_CHIP) && (CFG_GLOBAL_CHIP == FPGA11107) +#define tmrHw_HIGH_FREQUENCY_MHZ 150 /* Always 150MHz for FPGA */ +#define tmrHw_HIGH_FREQUENCY_HZ 150000000 +#else +#define tmrHw_HIGH_FREQUENCY_HZ HW_CFG_BUS_CLK_HZ +#define tmrHw_HIGH_FREQUENCY_MHZ (HW_CFG_BUS_CLK_HZ / 1000000) +#endif + +#define tmrHw_LOW_RESOLUTION_CLOCK tmrHw_LOW_FREQUENCY_HZ +#define tmrHw_HIGH_RESOLUTION_CLOCK tmrHw_HIGH_FREQUENCY_HZ +#define tmrHw_MAX_COUNT (0xFFFFFFFF) /* maximum number of count a timer can count */ +#define tmrHw_TIMER_NUM_COUNT (4) /* Number of timer module supported */ + +typedef struct { + uint32_t LoadValue; /* Load value for timer */ + uint32_t CurrentValue; /* Current value for timer */ + uint32_t Control; /* Control register */ + uint32_t InterruptClear; /* Interrupt clear register */ + uint32_t RawInterruptStatus; /* Raw interrupt status */ + uint32_t InterruptStatus; /* Masked interrupt status */ + uint32_t BackgroundLoad; /* Background load value */ + uint32_t padding; /* Padding register */ +} tmrHw_REG_t; + +/* Control bot masks */ +#define tmrHw_CONTROL_TIMER_ENABLE 0x00000080 +#define tmrHw_CONTROL_PERIODIC 0x00000040 +#define tmrHw_CONTROL_INTERRUPT_ENABLE 0x00000020 +#define tmrHw_CONTROL_PRESCALE_MASK 0x0000000C +#define tmrHw_CONTROL_PRESCALE_1 0x00000000 +#define tmrHw_CONTROL_PRESCALE_16 0x00000004 +#define tmrHw_CONTROL_PRESCALE_256 0x00000008 +#define tmrHw_CONTROL_32BIT 0x00000002 +#define tmrHw_CONTROL_ONESHOT 0x00000001 +#define tmrHw_CONTROL_FREE_RUNNING 0x00000000 + +#define tmrHw_CONTROL_MODE_MASK (tmrHw_CONTROL_PERIODIC | tmrHw_CONTROL_ONESHOT) + +#define pTmrHw ((volatile tmrHw_REG_t *)tmrHw_MODULE_BASE_ADDR) + +#endif /* _TMRHW_REG_H */ diff --git a/arch/arm/mach-bcmring/include/mach/timer.h b/arch/arm/mach-bcmring/include/mach/timer.h new file mode 100644 index 0000000..5a94bbb --- /dev/null +++ b/arch/arm/mach-bcmring/include/mach/timer.h @@ -0,0 +1,77 @@ +/***************************************************************************** +* Copyright 2004 - 2008 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +/* +* +***************************************************************************** +* +* timer.h +* +* PURPOSE: +* +* +* +* NOTES: +* +*****************************************************************************/ + +#if !defined(BCM_LINUX_TIMER_H) +#define BCM_LINUX_TIMER_H + +#if defined(__KERNEL__) + +/* ---- Include Files ---------------------------------------------------- */ +/* ---- Constants and Types ---------------------------------------------- */ + +typedef unsigned int timer_tick_count_t; +typedef unsigned int timer_tick_rate_t; +typedef unsigned int timer_msec_t; + +/* ---- Variable Externs ------------------------------------------------- */ +/* ---- Function Prototypes ---------------------------------------------- */ + +/**************************************************************************** +* +* timer_get_tick_count +* +* +***************************************************************************/ +timer_tick_count_t timer_get_tick_count(void); + +/**************************************************************************** +* +* timer_get_tick_rate +* +* +***************************************************************************/ +timer_tick_rate_t timer_get_tick_rate(void); + +/**************************************************************************** +* +* timer_get_msec +* +* +***************************************************************************/ +timer_msec_t timer_get_msec(void); + +/**************************************************************************** +* +* timer_ticks_to_msec +* +* +***************************************************************************/ +timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks); + +#endif /* __KERNEL__ */ +#endif /* BCM_LINUX_TIMER_H */ diff --git a/arch/arm/mach-bcmring/timer.c b/arch/arm/mach-bcmring/timer.c new file mode 100644 index 0000000..2d415d2 --- /dev/null +++ b/arch/arm/mach-bcmring/timer.c @@ -0,0 +1,62 @@ +/***************************************************************************** +* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +#include <linux/version.h> +#include <linux/types.h> +#include <linux/module.h> +#include <csp/tmrHw.h> + +#include <mach/timer.h> +/* The core.c file initializes timers 1 and 3 as a linux clocksource. */ +/* The real time clock should probably be the real linux clocksource. */ +/* In the meantime, this file should agree with core.c as to the */ +/* profiling timer. If the clocksource is moved to rtc later, then */ +/* we can init the profiling timer here instead. */ + +/* Timer 1 provides 25MHz resolution syncrhonized to scheduling and APM timing */ +/* Timer 3 provides bus freqeuncy sychronized to ACLK, but spread spectrum will */ +/* affect synchronization with scheduling and APM timing. */ + +#define PROF_TIMER 1 + +timer_tick_rate_t timer_get_tick_rate(void) +{ + return tmrHw_getCountRate(PROF_TIMER); +} + +timer_tick_count_t timer_get_tick_count(void) +{ + return tmrHw_GetCurrentCount(PROF_TIMER); /* change downcounter to upcounter */ +} + +timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks) +{ + static int tickRateMsec; + + if (tickRateMsec == 0) { + tickRateMsec = timer_get_tick_rate() / 1000; + } + + return ticks / tickRateMsec; +} + +timer_msec_t timer_get_msec(void) +{ + return timer_ticks_to_msec(timer_get_tick_count()); +} + +EXPORT_SYMBOL(timer_get_tick_count); +EXPORT_SYMBOL(timer_ticks_to_msec); +EXPORT_SYMBOL(timer_get_tick_rate); +EXPORT_SYMBOL(timer_get_msec); -- 1.6.0.6
Leo Hao Chen Software Engineer Broadcom Canada Inc.
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