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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 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.
*
****************************************************************************/
#include "kernel.h"
#include "system.h"
#include "gcc_extensions.h"
#include "system-target.h"
#include "cpu.h"
#include "clkctrl-imx233.h"
#include "pinctrl-imx233.h"
#include "timrot-imx233.h"
#include "dma-imx233.h"
#include "ssp-imx233.h"
#include "i2c-imx233.h"
#include "dcp-imx233.h"
#include "icoll-imx233.h"
#include "lradc-imx233.h"
#include "rtc-imx233.h"
#include "lcd.h"
#include "backlight-target.h"
#include "button.h"
#include "fmradio_i2c.h"
void imx233_chip_reset(void)
{
HW_CLKCTRL_RESET = HW_CLKCTRL_RESET_CHIP;
}
void system_reboot(void)
{
_backlight_off();
disable_irq();
/* use watchdog to reset */
imx233_chip_reset();
while(1);
}
void system_exception_wait(void)
{
/* make sure lcd and backlight are on */
lcd_update();
_backlight_on();
_backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
/* wait until button release (if a button is pressed) */
while(button_read_device());
/* then wait until next button press */
while(!button_read_device());
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
static void set_page_tables(void)
{
/* map every memory region to itself */
map_section(0, 0, 0x1000, CACHE_NONE);
/* map RAM and enable caching for it */
map_section(DRAM_ORIG, CACHED_DRAM_ADDR, MEMORYSIZE, CACHE_ALL);
map_section(DRAM_ORIG, BUFFERED_DRAM_ADDR, MEMORYSIZE, BUFFERED);
}
void memory_init(void)
{
ttb_init();
set_page_tables();
enable_mmu();
}
void system_init(void)
{
imx233_rtc_init();
imx233_icoll_init();
imx233_pinctrl_init();
imx233_timrot_init();
imx233_dma_init();
imx233_ssp_init();
imx233_dcp_init();
imx233_lradc_init();
imx233_i2c_init();
#if defined(SANSA_FUZEPLUS) && !defined(BOOTLOADER)
fmradio_i2c_init();
#endif
}
bool imx233_us_elapsed(uint32_t ref, unsigned us_delay)
{
uint32_t cur = HW_DIGCTL_MICROSECONDS;
if(ref + us_delay <= ref)
return !(cur > ref) && !(cur < (ref + us_delay));
else
return (cur < ref) || cur >= (ref + us_delay);
}
void imx233_reset_block(volatile uint32_t *block_reg)
{
/* soft-reset */
__REG_SET(*block_reg) = __BLOCK_SFTRST;
/* make sure block is gated off */
while(!(*block_reg & __BLOCK_CLKGATE));
/* bring block out of reset */
__REG_CLR(*block_reg) = __BLOCK_SFTRST;
while(*block_reg & __BLOCK_SFTRST);
/* make sure clock is running */
__REG_CLR(*block_reg) = __BLOCK_CLKGATE;
while(*block_reg & __BLOCK_CLKGATE);
}
void udelay(unsigned us)
{
uint32_t ref = HW_DIGCTL_MICROSECONDS;
while(!imx233_us_elapsed(ref, us));
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
void set_cpu_frequency(long frequency)
{
switch(frequency)
{
#if 0
case IMX233_CPUFREQ_454_MHz:
/* clk_h@clk_p/3 */
imx233_set_clock_divisor(CLK_AHB, 3);
/* clk_p@ref_cpu/1*18/19 */
imx233_set_fractional_divisor(CLK_CPU, 19);
imx233_set_clock_divisor(CLK_CPU, 1);
/* ref_cpu@480 MHz
* clk_p@454.74 MHz
* clk_h@151.58 MHz */
break;
#endif
default:
break;
}
}
#endif
void imx233_enable_usb_controller(bool enable)
{
if(enable)
__REG_CLR(HW_DIGCTL_CTRL) = HW_DIGCTL_CTRL__USB_CLKGATE;
else
__REG_SET(HW_DIGCTL_CTRL) = HW_DIGCTL_CTRL__USB_CLKGATE;
}
void imx233_enable_usb_phy(bool enable)
{
if(enable)
{
__REG_CLR(HW_USBPHY_CTRL) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
__REG_CLR(HW_USBPHY_PWD) = HW_USBPHY_PWD__ALL;
}
else
{
__REG_SET(HW_USBPHY_PWD) = HW_USBPHY_PWD__ALL;
__REG_SET(HW_USBPHY_CTRL) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
}
}
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