544a732419
Add support for the timer/counter unit on a JZ4740 SoC. This code is used as a common base for the JZ4740 clocksource/clockevent implementation and PWM support. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1396/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/*
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* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
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* JZ4740 platform timer support
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef __MIPS_JZ4740_TIMER_H__
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#define __MIPS_JZ4740_TIMER_H__
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#include <linux/module.h>
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#include <linux/io.h>
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#define JZ_REG_TIMER_STOP 0x0C
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#define JZ_REG_TIMER_STOP_SET 0x1C
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#define JZ_REG_TIMER_STOP_CLEAR 0x2C
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#define JZ_REG_TIMER_ENABLE 0x00
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#define JZ_REG_TIMER_ENABLE_SET 0x04
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#define JZ_REG_TIMER_ENABLE_CLEAR 0x08
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#define JZ_REG_TIMER_FLAG 0x10
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#define JZ_REG_TIMER_FLAG_SET 0x14
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#define JZ_REG_TIMER_FLAG_CLEAR 0x18
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#define JZ_REG_TIMER_MASK 0x20
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#define JZ_REG_TIMER_MASK_SET 0x24
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#define JZ_REG_TIMER_MASK_CLEAR 0x28
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#define JZ_REG_TIMER_DFR(x) (((x) * 0x10) + 0x30)
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#define JZ_REG_TIMER_DHR(x) (((x) * 0x10) + 0x34)
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#define JZ_REG_TIMER_CNT(x) (((x) * 0x10) + 0x38)
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#define JZ_REG_TIMER_CTRL(x) (((x) * 0x10) + 0x3C)
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#define JZ_TIMER_IRQ_HALF(x) BIT((x) + 0x10)
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#define JZ_TIMER_IRQ_FULL(x) BIT(x)
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#define JZ_TIMER_CTRL_PWM_ABBRUPT_SHUTDOWN BIT(9)
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#define JZ_TIMER_CTRL_PWM_ACTIVE_LOW BIT(8)
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#define JZ_TIMER_CTRL_PWM_ENABLE BIT(7)
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#define JZ_TIMER_CTRL_PRESCALE_MASK 0x1c
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#define JZ_TIMER_CTRL_PRESCALE_OFFSET 0x3
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#define JZ_TIMER_CTRL_PRESCALE_1 (0 << 3)
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#define JZ_TIMER_CTRL_PRESCALE_4 (1 << 3)
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#define JZ_TIMER_CTRL_PRESCALE_16 (2 << 3)
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#define JZ_TIMER_CTRL_PRESCALE_64 (3 << 3)
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#define JZ_TIMER_CTRL_PRESCALE_256 (4 << 3)
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#define JZ_TIMER_CTRL_PRESCALE_1024 (5 << 3)
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#define JZ_TIMER_CTRL_PRESCALER(x) ((x) << JZ_TIMER_CTRL_PRESCALE_OFFSET)
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#define JZ_TIMER_CTRL_SRC_EXT BIT(2)
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#define JZ_TIMER_CTRL_SRC_RTC BIT(1)
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#define JZ_TIMER_CTRL_SRC_PCLK BIT(0)
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extern void __iomem *jz4740_timer_base;
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void __init jz4740_timer_init(void);
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static inline void jz4740_timer_stop(unsigned int timer)
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{
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writel(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_STOP_SET);
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}
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static inline void jz4740_timer_start(unsigned int timer)
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{
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writel(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_STOP_CLEAR);
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}
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static inline bool jz4740_timer_is_enabled(unsigned int timer)
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{
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return readb(jz4740_timer_base + JZ_REG_TIMER_ENABLE) & BIT(timer);
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}
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static inline void jz4740_timer_enable(unsigned int timer)
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{
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writeb(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_ENABLE_SET);
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}
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static inline void jz4740_timer_disable(unsigned int timer)
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{
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writeb(BIT(timer), jz4740_timer_base + JZ_REG_TIMER_ENABLE_CLEAR);
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}
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static inline void jz4740_timer_set_period(unsigned int timer, uint16_t period)
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{
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writew(period, jz4740_timer_base + JZ_REG_TIMER_DFR(timer));
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}
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static inline void jz4740_timer_set_duty(unsigned int timer, uint16_t duty)
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{
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writew(duty, jz4740_timer_base + JZ_REG_TIMER_DHR(timer));
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}
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static inline void jz4740_timer_set_count(unsigned int timer, uint16_t count)
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{
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writew(count, jz4740_timer_base + JZ_REG_TIMER_CNT(timer));
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}
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static inline uint16_t jz4740_timer_get_count(unsigned int timer)
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{
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return readw(jz4740_timer_base + JZ_REG_TIMER_CNT(timer));
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}
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static inline void jz4740_timer_ack_full(unsigned int timer)
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{
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writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_FLAG_CLEAR);
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}
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static inline void jz4740_timer_irq_full_enable(unsigned int timer)
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{
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writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_FLAG_CLEAR);
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writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_MASK_CLEAR);
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}
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static inline void jz4740_timer_irq_full_disable(unsigned int timer)
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{
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writel(JZ_TIMER_IRQ_FULL(timer), jz4740_timer_base + JZ_REG_TIMER_MASK_SET);
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}
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static inline void jz4740_timer_set_ctrl(unsigned int timer, uint16_t ctrl)
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{
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writew(ctrl, jz4740_timer_base + JZ_REG_TIMER_CTRL(timer));
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}
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static inline uint16_t jz4740_timer_get_ctrl(unsigned int timer)
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{
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return readw(jz4740_timer_base + JZ_REG_TIMER_CTRL(timer));
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}
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#endif
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