ac61951452
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12382 a1c6a512-1295-4272-9138-f99709370657
157 lines
6.4 KiB
C
157 lines
6.4 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2006 by Linus Nielsen Feltzing
|
|
*
|
|
* All files in this archive are subject to the GNU General Public License.
|
|
* See the file COPYING in the source tree root for full license agreement.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
#include "config.h"
|
|
#include "cpu.h"
|
|
#include "kernel.h"
|
|
#include "system.h"
|
|
#include "power.h"
|
|
#include "timer.h"
|
|
#include "pcf50606.h"
|
|
|
|
/* Settings for all possible clock frequencies (with properly working timers)
|
|
* NOTE: Some 5249 chips don't like having PLLDIV set to 0. We must avoid that!
|
|
*
|
|
* xxx_REFRESH_TIMER below
|
|
* system.h, CPUFREQ_xxx_MULT |
|
|
* | |
|
|
* V V
|
|
* Refreshtim. IDECONFIG1/IDECONFIG2
|
|
* CPUCLK/Hz MULT PLLCR 16MB 32MB CSCR0 CSCR1 CSCR3 CS2Pre CS2Post CS2Wait
|
|
* ---------------------------------------------------------------------------------------
|
|
* 11289600 1 0x10c00200 4 1 0x0180 0x0180 0x0180 1 0 0
|
|
* 22579200 2 0x15c9e025 10 4 0x0180 0x0180 0x0180 1 0 0
|
|
* 33868800 3 0x13c8e025 15 7 0x0180 0x0180 0x0180 1 0 0
|
|
* 45158400 4 0x15c9e021 21 10 0x0580 0x0180 0x0580 1 0 0
|
|
* 56448000 5 0x12c9e025 26 12 0x0580 0x0980
|
|
* 67737600 6 0x13c8e021 32 15 0x0980 0x0d80
|
|
* 79027200 7 0x13ca6021 37 18 0x0980 0x1180
|
|
* 90316800 8 0x13cbe021 43 21 0x0d80 0x1580
|
|
* 101606400 9 0x11c92025 48 23 0x0d80 0x1980
|
|
* 112896000 10 0x11c9e025 54 26 0x1180 0x1d80
|
|
* 124185600 11 0x11cae025 59 29 0x1180 0x1180 0x2180 2 1 2
|
|
*/
|
|
|
|
#if MEM < 32
|
|
#define MAX_REFRESH_TIMER 59
|
|
#define NORMAL_REFRESH_TIMER 21
|
|
#define DEFAULT_REFRESH_TIMER 4
|
|
#else
|
|
#define MAX_REFRESH_TIMER 29
|
|
#define NORMAL_REFRESH_TIMER 10
|
|
#define DEFAULT_REFRESH_TIMER 1
|
|
#endif
|
|
|
|
#ifdef IRIVER_H300_SERIES
|
|
#define RECALC_DELAYS(f) \
|
|
pcf50606_i2c_recalc_delay(f)
|
|
#else
|
|
#define RECALC_DELAYS(f)
|
|
#endif
|
|
|
|
#ifdef HAVE_SERIAL
|
|
#define BAUD_RATE 57600
|
|
#define BAUDRATE_DIV_DEFAULT (CPUFREQ_DEFAULT/(BAUD_RATE*32*2))
|
|
#define BAUDRATE_DIV_NORMAL (CPUFREQ_NORMAL/(BAUD_RATE*32*2))
|
|
#define BAUDRATE_DIV_MAX (CPUFREQ_MAX/(BAUD_RATE*32*2))
|
|
#endif
|
|
|
|
void set_cpu_frequency (long) __attribute__ ((section (".icode")));
|
|
void set_cpu_frequency(long frequency)
|
|
{
|
|
switch(frequency)
|
|
{
|
|
case CPUFREQ_MAX:
|
|
DCR = (0x8200 | DEFAULT_REFRESH_TIMER);
|
|
/* Refresh timer for bypass frequency */
|
|
PLLCR &= ~1; /* Bypass mode */
|
|
timers_adjust_prescale(CPUFREQ_DEFAULT_MULT, false);
|
|
RECALC_DELAYS(CPUFREQ_MAX);
|
|
PLLCR = 0x018ae025 | (PLLCR & 0x70400000);
|
|
CSCR0 = 0x00001180; /* Flash: 4 wait states */
|
|
CSCR1 = 0x00001580; /* LCD: 5 wait states */
|
|
#if CONFIG_USBOTG == USBOTG_ISP1362
|
|
CSCR3 = 0x00002180; /* USBOTG: 8 wait states */
|
|
#endif
|
|
while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
|
|
This may take up to 10ms! */
|
|
timers_adjust_prescale(CPUFREQ_MAX_MULT, true);
|
|
DCR = (0x8200 | MAX_REFRESH_TIMER); /* Refresh timer */
|
|
cpu_frequency = CPUFREQ_MAX;
|
|
IDECONFIG1 = 0x10100000 | (1 << 13) | (2 << 10);
|
|
/* SRE active on write (H300 USBOTG) | BUFEN2 enable | CS2Post | CS2Pre */
|
|
IDECONFIG2 = 0x40000 | (2 << 8); /* TA enable + CS2wait */
|
|
|
|
#ifdef HAVE_SERIAL
|
|
UBG10 = BAUDRATE_DIV_MAX >> 8;
|
|
UBG20 = BAUDRATE_DIV_MAX & 0xff;
|
|
#endif
|
|
break;
|
|
|
|
case CPUFREQ_NORMAL:
|
|
DCR = (DCR & ~0x01ff) | DEFAULT_REFRESH_TIMER;
|
|
/* Refresh timer for bypass frequency */
|
|
PLLCR &= ~1; /* Bypass mode */
|
|
timers_adjust_prescale(CPUFREQ_DEFAULT_MULT, false);
|
|
RECALC_DELAYS(CPUFREQ_NORMAL);
|
|
PLLCR = 0x038be025 | (PLLCR & 0x70400000);
|
|
CSCR0 = 0x00000580; /* Flash: 1 wait state */
|
|
CSCR1 = 0x00000180; /* LCD: 0 wait states */
|
|
#if CONFIG_USBOTG == USBOTG_ISP1362
|
|
CSCR3 = 0x00000580; /* USBOTG: 1 wait state */
|
|
#endif
|
|
while(!(PLLCR & 0x80000000)) {}; /* Wait until the PLL has locked.
|
|
This may take up to 10ms! */
|
|
timers_adjust_prescale(CPUFREQ_NORMAL_MULT, true);
|
|
DCR = (0x8000 | NORMAL_REFRESH_TIMER); /* Refresh timer */
|
|
cpu_frequency = CPUFREQ_NORMAL;
|
|
IDECONFIG1 = 0x10100000 | (0 << 13) | (1 << 10);
|
|
/* SRE active on write (H300 USBOTG) | BUFEN2 enable | CS2Post | CS2Pre */
|
|
IDECONFIG2 = 0x40000 | (0 << 8); /* TA enable + CS2wait */
|
|
|
|
#ifdef HAVE_SERIAL
|
|
UBG10 = BAUDRATE_DIV_NORMAL >> 8;
|
|
UBG20 = BAUDRATE_DIV_NORMAL & 0xff;
|
|
#endif
|
|
break;
|
|
default:
|
|
DCR = (DCR & ~0x01ff) | DEFAULT_REFRESH_TIMER;
|
|
/* Refresh timer for bypass frequency */
|
|
PLLCR &= ~1; /* Bypass mode */
|
|
timers_adjust_prescale(CPUFREQ_DEFAULT_MULT, true);
|
|
RECALC_DELAYS(CPUFREQ_DEFAULT);
|
|
/* Power down PLL, but keep CRSEL and CLSEL */
|
|
PLLCR = 0x00800200 | (PLLCR & 0x70400000);
|
|
CSCR0 = 0x00000180; /* Flash: 0 wait states */
|
|
CSCR1 = 0x00000180; /* LCD: 0 wait states */
|
|
#if CONFIG_USBOTG == USBOTG_ISP1362
|
|
CSCR3 = 0x00000180; /* USBOTG: 0 wait states */
|
|
#endif
|
|
DCR = (0x8000 | DEFAULT_REFRESH_TIMER); /* Refresh timer */
|
|
cpu_frequency = CPUFREQ_DEFAULT;
|
|
IDECONFIG1 = 0x10100000 | (0 << 13) | (1 << 10);
|
|
/* SRE active on write (H300 USBOTG) | BUFEN2 enable | CS2Post | CS2Pre */
|
|
IDECONFIG2 = 0x40000 | (0 << 8); /* TA enable + CS2wait */
|
|
|
|
#ifdef HAVE_SERIAL
|
|
UBG10 = BAUDRATE_DIV_DEFAULT >> 8;
|
|
UBG20 = BAUDRATE_DIV_DEFAULT & 0xff;
|
|
#endif
|
|
break;
|
|
}
|
|
}
|