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Adjustable CPU frequency for iRiver

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6093 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2005-03-01 14:35:10 +00:00
parent 76620fbe5b
commit d94f328838
5 changed files with 103 additions and 0 deletions
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3
firmware/export/config-gmini120.h
View file

@ -56,4 +56,7 @@
#define HAVE_LED
/* Define this if you have adjustable CPU frequency */
#define HAVE_ADJUSTABLE_CPU_FREQ
#endif

3
firmware/export/config-gminisp.h
View file

@ -50,4 +50,7 @@
#define HAVE_LED
/* Define this if you have adjustable CPU frequency */
#define HAVE_ADJUSTABLE_CPU_FREQ
#endif

3
firmware/export/config-h100.h
View file

@ -53,4 +53,7 @@
/* Define this if you have a software controlled poweroff */
#define HAVE_SW_POWEROFF
/* Define this if you have adjustable CPU frequency */
#define HAVE_ADJUSTABLE_CPU_FREQ
#endif

14
firmware/export/system.h
View file

@ -22,11 +22,18 @@
#include "cpu.h"
#include "config.h"
#include "stdbool.h"
extern void system_reboot (void);
extern void system_init(void);
extern long cpu_frequency;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
#define FREQ cpu_frequency
#else
#define FREQ CPU_FREQ
#endif
#define BAUDRATE 9600
#ifndef NULL
@ -188,6 +195,13 @@ static inline void invalidate_icache(void)
"movec.l %d0,%cacr");
}
#define CPUFREQ_DEFAULT CPU_FREQ
#define CPUFREQ_NORMAL 47980800
#define CPUFREQ_MAX 95961600
void set_cpu_frequency(long frequency);
void cpu_boost(bool on_off);
#elif CONFIG_CPU == TCC730
extern int smsc_version(void);

80
firmware/system.c
View file

@ -22,6 +22,11 @@
#include "lcd.h"
#include "font.h"
#include "system.h"
#include "kernel.h"
#ifndef SIMULATOR
long cpu_frequency = CPU_FREQ;
#endif
#if CONFIG_CPU == TCC730
@ -416,6 +421,81 @@ void system_init(void)
{
}
void set_cpu_frequency (long) __attribute__ ((section (".icode")));
void set_cpu_frequency(long frequency)
{
switch(frequency)
{
case CPUFREQ_MAX:
DCR = (DCR & ~0x000001ff) | 1; /* Refresh timer for bypass
frequency */
PLLCR &= ~1; /* Bypass mode */
PLLCR = 0x11c8600d;
CSCR0 = 0x00000580; /* Flash: 1 wait state */
CSCR1 = 0x00001180; /* LCD: 4 wait states */
while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
This may take up to 10ms! */
DCR = (DCR & ~0x000001ff) | 33; /* Refresh timer */
cpu_frequency = CPUFREQ_MAX;
tick_start(1000/HZ);
IDECONFIG1 = (IDECONFIG1 & ~(7 << 10)) | (5 << 10); /* CS2Pre,Post */
IDECONFIG2 = (IDECONFIG2 & ~0x0000ff00) | (0 << 8); /* CS2wait */
break;
case CPUFREQ_NORMAL:
DCR = (DCR & ~0x000001ff) | 1; /* Refresh timer for bypass
frequency */
PLLCR &= ~1; /* Bypass mode */
PLLCR = 0x10c86801;
CSCR0 = 0x00000180; /* Flash: 0 wait states */
CSCR1 = 0x00000980; /* LCD: 2 wait states */
while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
This may take up to 10ms! */
DCR = (DCR & ~0x000001ff) | 10; /* Refresh timer */
cpu_frequency = CPUFREQ_NORMAL;
tick_start(1000/HZ);
IDECONFIG1 = (IDECONFIG1 & ~(7 << 10)) | (5 << 10); /* CS2Pre,Post */
IDECONFIG2 = (IDECONFIG2 & ~0x0000ff00) | (0 << 8); /* CS2wait */
break;
default:
DCR = (DCR & ~0x000001ff) | 1; /* Refresh timer for bypass
frequency */
PLLCR &= ~1; /* Bypass mode */
CSCR0 = 0x00000180; /* Flash: 0 wait states */
CSCR1 = 0x00000180; /* LCD: 0 wait states */
cpu_frequency = CPU_FREQ;
tick_start(1000/HZ);
IDECONFIG1 = (IDECONFIG1 & ~(7 << 10)) | (1 << 10); /* CS2Pre,Post */
IDECONFIG2 = (IDECONFIG2 & ~0x0000ff00) | (0 << 8); /* CS2wait */
break;
}
}
void cpu_boost(bool on_off)
{
static int counter = 0;
if(on_off)
{
/* Boost the frequency if not already boosted */
if(counter++ == 0)
{
set_cpu_frequency(CPUFREQ_MAX);
}
}
else
{
/* Lower the frequency if the counter reaches 0 */
if(--counter == 0)
{
set_cpu_frequency(CPUFREQ_NORMAL);
}
/* Safety measure */
if(counter < 0)
counter = 0;
}
}
#elif CONFIG_CPU == SH7034
#include "led.h"
#include "system.h"