eac1ca22bd
NOTE: this commit does not introduce any change, ideally even the binary should
be almost the same. I checked the disassembly by hand and there are only a few
differences here and there, mostly the compiler decides to compile very close
expressions slightly differently. I tried to run the new code on several targets
to make sure and saw no difference.
The major syntax changes of the new headers are as follows:
- BF_{WR,SET,CLR} are now superpowerful and allows to set several fileds at once:
BF_WR(reg, field1(value1), field2(value2), ...)
- BF_CS (use like BF_WR) does a write to reg_CLR and then reg_SET instead of RMW
- there is no more need for macros like BF_{WR_,SET,CLR}_V, since one can simply
BF_WR with field_V(name)
- the old BF_SETV macro has no trivial equivalent and is replaced with its
its equivalent for BF_WR(reg_SET, ...)
I also rename the register headers: "regs/regs-x.h" -> "regs/x.h" to avoid the
redundant "regs".
Final note: the registers were generated using the following command:
./headergen_v2 -g imx -o ../../firmware/target/arm/imx233/regs/ desc/regs-stmp3{600,700,780}.xml
Change-Id: I7485e8b4315a0929a8edb63e7fa1edcaa54b1edc
88 lines
3.1 KiB
C
88 lines
3.1 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/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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/* all-in-one function which handle all quirks */
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void imx233_clkctrl_set_cpu_hbus_div(int cpu_idiv, int cpu_fdiv, int hbus_div);
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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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