86 lines
3 KiB
C
86 lines
3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright © 2011 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef CLKCTRL_IMX233_H
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#define CLKCTRL_IMX233_H
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#include "config.h"
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#include "system.h"
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#include "cpu.h"
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#include "regs/regs-clkctrl.h"
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static inline void core_sleep(void)
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{
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BF_WR(CLKCTRL_CPU, INTERRUPT_WAIT, 1);
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asm volatile (
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"mcr p15, 0, %0, c7, c0, 4 \n" /* Wait for interrupt */
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"nop\n" /* Datasheet unclear: "The lr sent to handler points here after RTI"*/
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"nop\n"
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: : "r"(0)
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);
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enable_irq();
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}
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enum imx233_clock_t
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{
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CLK_SSP, /* freq, div, bypass, enable */
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CLK_IO, /* freq, frac (stmp3700+) */
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CLK_CPU, /* freq, div, frac, bypass */
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CLK_HBUS, /* freq, div, frac */
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CLK_PLL, /* freq, enable */
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CLK_XTAL, /* freq */
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CLK_EMI, /* freq, div, frac, bypass */
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CLK_XBUS, /* freq, div */
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CLK_FILT, /* enable */
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CLK_DRI, /* enable */
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CLK_PWM, /* enable */
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CLK_TIMROT, /* enable */
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CLK_UART, /* enable */
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#if IMX233_SUBTARGET >= 3700
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CLK_PIX, /* freq, div, frac, bypass, enable */
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#endif
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};
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void imx233_clkctrl_init(void);
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/* only use it for non-fractional clocks (ie not for IO) */
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void imx233_clkctrl_enable(enum imx233_clock_t clk, bool enable);
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bool imx233_clkctrl_is_enabled(enum imx233_clock_t cl);
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void imx233_clkctrl_set_div(enum imx233_clock_t clk, int div);
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int imx233_clkctrl_get_div(enum imx233_clock_t clk);
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#if IMX233_SUBTARGET >= 3700
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/* call with fracdiv=0 to disable it */
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void imx233_clkctrl_set_frac_div(enum imx233_clock_t clk, int fracdiv);
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/* 0 means fractional dividor disable */
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int imx233_clkctrl_get_frac_div(enum imx233_clock_t clk);
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void imx233_clkctrl_set_bypass(enum imx233_clock_t clk, bool bypass);
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bool imx233_clkctrl_get_bypass(enum imx233_clock_t clk);
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#endif
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void imx233_clkctrl_enable_usb(bool enable);
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bool imx233_clkctrl_is_usb_enabled(void);
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/* returns frequency in KHz */
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unsigned imx233_clkctrl_get_freq(enum imx233_clock_t clk);
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/* auto-slow stuff */
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void imx233_clkctrl_set_auto_slow_div(unsigned div);
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unsigned imx233_clkctrl_get_auto_slow_div(void);
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void imx233_clkctrl_enable_auto_slow(bool enable);
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bool imx233_clkctrl_is_auto_slow_enabled(void);
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#endif /* CLKCTRL_IMX233_H */
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