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rockbox/firmware/target/arm/system-pp502x.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Alan Korr
*
* 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 "system.h"
#include "thread.h"
#include "i2s.h"
#include "i2c-pp.h"
#if NUM_CORES > 1
struct mutex boostctrl_mtx NOCACHEBSS_ATTR;
#endif
#ifndef BOOTLOADER
extern void TIMER1(void);
extern void TIMER2(void);
extern void ipod_mini_button_int(void); /* iPod Mini 1st gen only */
extern void ipod_4g_button_int(void); /* iPod 4th gen and higher only */
#ifdef SANSA_E200
extern void button_int(void);
extern void clickwheel_int(void);
extern void microsd_int(void);
#endif
#ifdef HAVE_USBSTACK
#include "usbstack/core.h"
#endif
void irq(void)
{
if(CURRENT_CORE == CPU)
{
if (CPU_INT_STAT & TIMER1_MASK) {
TIMER1();
#ifdef HAVE_USBSTACK
usb_stack_irq();
#endif
} else if (CPU_INT_STAT & TIMER2_MASK)
TIMER2();
#if defined(IPOD_MINI) /* Mini 1st gen only, mini 2nd gen uses iPod 4G code */
else if (CPU_HI_INT_STAT & GPIO_MASK)
ipod_mini_button_int();
#elif CONFIG_KEYPAD == IPOD_4G_PAD /* except Mini 1st gen, handled above */
else if (CPU_HI_INT_STAT & I2C_MASK)
ipod_4g_button_int();
#elif defined(SANSA_E200)
else if (CPU_HI_INT_STAT & GPIO0_MASK) {
if (GPIOA_INT_STAT & 0x80)
microsd_int();
}
else if (CPU_HI_INT_STAT & GPIO1_MASK) {
if (GPIOF_INT_STAT & 0xff)
button_int();
if (GPIOH_INT_STAT & 0xc0)
clickwheel_int();
}
#endif
} else {
if (COP_INT_STAT & TIMER2_MASK)
TIMER2();
}
}
#endif /* BOOTLOADER */
/* TODO: The following function has been lifted straight from IPL, and
hence has a lot of numeric addresses used straight. I'd like to use
#defines for these, but don't know what most of them are for or even what
they should be named. Because of this I also have no way of knowing how
to extend the funtions to do alternate cache configurations. */
#ifndef BOOTLOADER
void flush_icache(void) ICODE_ATTR;
void flush_icache(void)
{
if (CACHE_CTL & CACHE_CTL_ENABLE)
{
CACHE_OPERATION |= CACHE_OP_FLUSH;
while ((CACHE_CTL & CACHE_CTL_BUSY) != 0);
}
}
void invalidate_icache(void) ICODE_ATTR;
void invalidate_icache(void)
{
if (CACHE_CTL & CACHE_CTL_ENABLE)
{
CACHE_OPERATION |= CACHE_OP_FLUSH | CACHE_OP_INVALIDATE;
while ((CACHE_CTL & CACHE_CTL_BUSY) != 0);
nop; nop; nop; nop;
}
}
static void init_cache(void)
{
/* Initialising the cache in the iPod bootloader prevents Rockbox from starting */
/* cache init mode */
CACHE_CTL |= CACHE_CTL_INIT;
/* what's this do? */
CACHE_PRIORITY |= CURRENT_CORE == CPU ? 0x10 : 0x20;
/* Cache if (addr & mask) >> 16 == (mask & match) >> 16:
* yes: 0x00000000 - 0x03ffffff
* no: 0x04000000 - 0x1fffffff
* yes: 0x20000000 - 0x23ffffff
* no: 0x24000000 - 0x3fffffff
*/
CACHE_MASK = 0x00001c00;
CACHE_OPERATION = 0xfc0;
/* enable cache */
CACHE_CTL |= CACHE_CTL_INIT | CACHE_CTL_ENABLE | CACHE_CTL_RUN;
nop; nop; nop; nop;
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
void set_cpu_frequency(long frequency)
#else
static void pp_set_cpu_frequency(long frequency)
#endif
{
unsigned long clcd_clock_src;
#if defined(HAVE_ADJUSTABLE_CPU_FREQ) && (NUM_CORES > 1)
/* Using mutex or spinlock isn't safe here. */
while (test_and_set(&boostctrl_mtx.locked, 1)) ;
#endif
cpu_frequency = frequency;
clcd_clock_src = CLCD_CLOCK_SRC; /* save selected color LCD clock source */
switch (frequency)
{
/* Note: The PP5022 PLL must be run at >= 96MHz
* Bits 20..21 select the post divider (1/2/4/8).
* PP5026 is similar to PP5022 except it doesn't
* have this limitation (and the post divider?) */
case CPUFREQ_MAX:
CLOCK_SOURCE = 0x10007772; /* source #1: 24MHz, #2, #3, #4: PLL */
CLCD_CLOCK_SRC &= ~0xc0000000; /* select 24MHz as color LCD clock source */
DEV_TIMING1 = 0x00000808;
#if CONFIG_CPU == PP5020
PLL_CONTROL = 0x8a020a03; /* 10/3 * 24MHz */
PLL_STATUS = 0xd19b; /* unlock frequencies > 66MHz */
PLL_CONTROL = 0x8a020a03; /* repeat setup */
udelay(500); /* wait for relock */
#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
PLL_CONTROL = 0x8a121403; /* (20/3 * 24MHz) / 2 */
udelay(250);
while (!(PLL_STATUS & 0x80000000)); /* wait for relock */
#endif
break;
case CPUFREQ_NORMAL:
CLOCK_SOURCE = 0x10007772; /* source #1: 24MHz, #2, #3, #4: PLL */
CLCD_CLOCK_SRC &= ~0xc0000000; /* select 24MHz as color LCD clock source */
DEV_TIMING1 = 0x00000303;
#if CONFIG_CPU == PP5020
PLL_CONTROL = 0x8a020504; /* 5/4 * 24MHz */
udelay(500); /* wait for relock */
#elif (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
PLL_CONTROL = 0x8a220501; /* (5/1 * 24MHz) / 4 */
udelay(250);
while (!(PLL_STATUS & 0x80000000)); /* wait for relock */
#endif
break;
case CPUFREQ_SLEEP:
CLOCK_SOURCE = 0x10002202; /* source #2: 32kHz, #1, #3, #4: 24MHz */
CLCD_CLOCK_SRC &= ~0xc0000000; /* select 24MHz as color LCD clock source */
PLL_CONTROL &= ~0x80000000; /* disable PLL */
udelay(10000); /* let 32kHz source stabilize? */
break;
default:
CLOCK_SOURCE = 0x10002222; /* source #1, #2, #3, #4: 24MHz */
CLCD_CLOCK_SRC &= ~0xc0000000; /* select 24MHz as color LCD clock source */
DEV_TIMING1 = 0x00000303;
PLL_CONTROL &= ~0x80000000; /* disable PLL */
cpu_frequency = CPUFREQ_DEFAULT;
break;
}
CLOCK_SOURCE = (CLOCK_SOURCE & ~0xf0000000) | 0x20000000; /* select source #2 */
CLCD_CLOCK_SRC; /* dummy read (to sync the write pipeline??) */
CLCD_CLOCK_SRC = clcd_clock_src; /* restore saved value */
#if defined(HAVE_ADJUSTABLE_CPU_FREQ) && (NUM_CORES > 1)
boostctrl_mtx.locked = 0;
#endif
}
#endif /* !BOOTLOADER */
void system_init(void)
{
#ifndef BOOTLOADER
if (CURRENT_CORE == CPU)
{
#if defined(SANSA_E200) || defined(SANSA_C200)
/* Reset all devices */
outl(inl(0x60006008) | 0x20, 0x60006008);
DEV_RS = 0x3bfffef8;
outl(0xffffffff, 0x60006008);
DEV_RS = 0;
outl(0x00000000, 0x60006008);
#elif defined (IRIVER_H10)
DEV_RS = 0x3ffffef8;
outl(0xffffffff, 0x60006008);
outl(inl(0x70000024) | 0xc0, 0x70000024);
DEV_RS = 0;
outl(0x00000000, 0x60006008);
#endif
#if !defined(SANSA_E200) && !defined(SANSA_C200)
/* Remap the flash ROM on CPU, keep hidden from COP:
* 0x00000000-0x3fffffff = 0x20000000-0x23ffffff */
MMAP1_LOGICAL = 0x20003c00;
MMAP1_PHYSICAL = 0x00003084 |
MMAP_PHYS_READ_MASK | MMAP_PHYS_WRITE_MASK |
MMAP_PHYS_DATA_MASK | MMAP_PHYS_CODE_MASK;
#endif
/* disable all irqs */
COP_HI_INT_CLR = -1;
CPU_HI_INT_CLR = -1;
HI_INT_FORCED_CLR = -1;
COP_INT_CLR = -1;
CPU_INT_CLR = -1;
INT_FORCED_CLR = -1;
GPIOA_INT_EN = 0;
GPIOB_INT_EN = 0;
GPIOC_INT_EN = 0;
GPIOD_INT_EN = 0;
GPIOE_INT_EN = 0;
GPIOF_INT_EN = 0;
GPIOG_INT_EN = 0;
GPIOH_INT_EN = 0;
GPIOI_INT_EN = 0;
GPIOJ_INT_EN = 0;
GPIOK_INT_EN = 0;
GPIOL_INT_EN = 0;
#if defined(SANSA_E200) || defined(SANSA_C200)
/* outl(0x00000000, 0x6000b000); */
outl(inl(0x6000a000) | 0x80000000, 0x6000a000); /* Init DMA controller? */
#endif
DEV_INIT |= 1 << 30; /* enable PLL power */
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
#if NUM_CORES > 1
spinlock_init(&boostctrl_mtx);
#endif
#else
pp_set_cpu_frequency(CPUFREQ_MAX);
#endif
}
init_cache();
#endif /* BOOTLOADER */
}
void system_reboot(void)
{
/* Reboot */
#ifdef SANSA_C200
CACHE_CTL &= ~CACHE_CTL_VECT_REMAP;
pp_i2c_send( 0x46, 0x23, 0x0); /* backlight off */
/* Magic used by the c200 OF: 0x23066000
Magic used by the c200 BL: 0x23066b7b
In both cases, the OF executes these 2 commands from iram. */
STRAP_OPT_A = 0x23066b7b;
DEV_RS = DEV_SYSTEM;
#else
DEV_RS |= DEV_SYSTEM;
#endif
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
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