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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Linus Nielsen Feltzing
*
* 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 "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
* PLLCR & Refreshtim. IDECONFIG1/IDECONFIG2
* CPUCLK/Hz MULT ~0x70400000 16MB 32MB CSCR0 CSCR1 CSCR3 CS2Pre CS2Post CS2Wait
* ---------------------------------------------------------------------------------------
* 11289600 1 0x00800200 4 1 0x0180 0x0180 0x0180 1 1 0
* 22579200 2 0x0589e025 10 4 0x0180 0x0180 0x0180 1 1 0
* 33868800 3 0x0388e025 15 7 0x0180 0x0180 0x0180 1 1 0
* 45158400 4 0x0589e021 21 10 0x0580 0x0180 0x0580 1 1 0
* 56448000 5 0x0289e025 26 12 0x0580 0x0580 0x0980 2 1 0
* 67737600 6 0x0388e021 32 15 0x0980 0x0980 0x0d80 2 1 0
* 79027200 7 0x038a6021 37 18 0x0980 0x0d80 0x1180 2 1 0
* 90316800 8 0x038be021 43 21 0x0d80 0x0d80 0x1580 2 1 0
* 101606400 9 0x01892025 48 23 0x0d80 0x1180 0x1980 2 1 0
* 112896000 10 0x0189e025 54 26 0x1180 0x1580 0x1d80 3 1 0
* 124185600 11 0x018ae025 59 29 0x1180 0x1580 0x2180 3 1 1
*/
#if MEMORYSIZE < 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
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
void set_cpu_frequency (long) __attribute__ ((section (".icode")));
void set_cpu_frequency(long frequency)
#else
void cf_set_cpu_frequency (long) __attribute__ ((section (".icode")));
void cf_set_cpu_frequency(long frequency)
#endif
{
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) | (3 << 10);
/* SRE active on write (H300 USBOTG) | BUFEN2 enable | CS2Post | CS2Pre */
IDECONFIG2 = 0x40000 | (1 << 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 = 0x0589e021 | (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 | (1 << 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 | (1 << 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;
}
}
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