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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright © 2011 by Amaury Pouly
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef CLKCTRL_IMX233_H
#define CLKCTRL_IMX233_H
#include "config.h"
#include "system.h"
#include "cpu.h"
#include "regs/clkctrl.h"
static inline void core_sleep(void)
{
BF_WR(CLKCTRL_CPU, INTERRUPT_WAIT(1));
asm volatile (
"mcr p15, 0, %0, c7, c0, 4 \n" /* Wait for interrupt */
"nop\n" /* Datasheet unclear: "The lr sent to handler points here after RTI"*/
"nop\n"
: : "r"(0)
);
enable_irq();
}
enum imx233_clock_t
{
CLK_SSP, /* freq, div, bypass, enable */
CLK_IO, /* freq, frac (stmp3700+) */
CLK_CPU, /* freq, div, frac, bypass */
CLK_HBUS, /* freq, div, frac */
CLK_PLL, /* freq, enable */
CLK_XTAL, /* freq */
CLK_EMI, /* freq, div, frac, bypass */
CLK_XBUS, /* freq, div */
CLK_FILT, /* enable */
CLK_DRI, /* enable */
CLK_PWM, /* enable */
CLK_TIMROT, /* enable */
CLK_UART, /* enable */
#if IMX233_SUBTARGET >= 3700
CLK_PIX, /* freq, div, frac, bypass, enable */
#endif
};
void imx233_clkctrl_init(void);
/* only use it for non-fractional clocks (ie not for IO) */
void imx233_clkctrl_enable(enum imx233_clock_t clk, bool enable);
bool imx233_clkctrl_is_enabled(enum imx233_clock_t cl);
void imx233_clkctrl_set_div(enum imx233_clock_t clk, int div);
int imx233_clkctrl_get_div(enum imx233_clock_t clk);
#if IMX233_SUBTARGET >= 3700
/* call with fracdiv=0 to disable it */
void imx233_clkctrl_set_frac_div(enum imx233_clock_t clk, int fracdiv);
/* 0 means fractional dividor disable */
int imx233_clkctrl_get_frac_div(enum imx233_clock_t clk);
void imx233_clkctrl_set_bypass(enum imx233_clock_t clk, bool bypass);
bool imx233_clkctrl_get_bypass(enum imx233_clock_t clk);
/* all-in-one function which handle all quirks */
void imx233_clkctrl_set_cpu_hbus_div(int cpu_idiv, int cpu_fdiv, int hbus_div);
#endif
void imx233_clkctrl_enable_usb(bool enable);
bool imx233_clkctrl_is_usb_enabled(void);
/* returns frequency in KHz */
unsigned imx233_clkctrl_get_freq(enum imx233_clock_t clk);
/* auto-slow stuff */
void imx233_clkctrl_set_auto_slow_div(unsigned div);
unsigned imx233_clkctrl_get_auto_slow_div(void);
void imx233_clkctrl_enable_auto_slow(bool enable);
bool imx233_clkctrl_is_auto_slow_enabled(void);
#endif /* CLKCTRL_IMX233_H */
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