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/*---------------------------------------------------------------------------------
$Id$
ARM7 serial control
Copyright (C) 2005
Michael Noland (joat)
Jason Rogers (dovoto)
Dave Murphy (WinterMute)
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you use
this software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
---------------------------------------------------------------------------------*/
#ifndef SERIAL_ARM7_INCLUDE
#define SERIAL_ARM7_INCLUDE
#ifndef ARM7
#error Serial header is for ARM7 only
#endif
#include <nds/bios.h>
// 'Networking'
#define REG_RCNT (*(vuint16*)0x04000134)
#define REG_KEYXY (*(vuint16*)0x04000136)
#define RTC_CR (*(vuint16*)0x04000138)
#define RTC_CR8 (*( vuint8*)0x04000138)
#define REG_SIOCNT (*(vuint16*)0x04000128)
#define SIO_DATA8 (*(vuint8*)0x0400012A)
#define SIO_DATA32 (*(vuint32*)0x04000120)
// Fixme: Does the hardware still support 16 bit comms mode?
// BIOS makes use of 32 bit mode, so some regs still exist
#define SIO_MULTI_0 (*(vuint16*)0x04000120)
#define SIO_MULTI_1 (*(vuint16*)0x04000122)
#define SIO_MULTI_2 (*(vuint16*)0x04000124)
#define SIO_MULTI_3 (*(vuint16*)0x04000126)
#define SIO_MULTI_SEND (*(vuint16*)0x0400012A)
// SPI chain registers
#define REG_SPICNT (*(vuint16*)0x040001C0)
#define REG_SPIDATA (*(vuint16*)0x040001C2)
#define SPI_ENABLE BIT(15)
#define SPI_IRQ BIT(14)
#define SPI_BUSY BIT(7)
// Pick the SPI clock speed
#define SPI_BAUD_4MHZ 0
#define SPI_BAUD_2MHZ 1
#define SPI_BAUD_1MHZ 2
#define SPI_BAUD_512KHZ 3
// meh
#define SPI_BAUD_4MHz 0
#define SPI_BAUD_2MHz 1
#define SPI_BAUD_1MHz 2
#define SPI_BAUD_512KHz 3
// Pick the SPI transfer length
#define SPI_BYTE_MODE (0<<10)
#define SPI_HWORD_MODE (1<<10)
// Pick the SPI device
#define SPI_DEVICE_POWER (0 << 8)
#define SPI_DEVICE_FIRMWARE (1 << 8)
#define SPI_DEVICE_NVRAM (1 << 8)
#define SPI_DEVICE_TOUCH (2 << 8)
#define SPI_DEVICE_MICROPHONE (2 << 8)
// When used, the /CS line will stay low after the transfer ends
// i.e. when we're part of a continuous transfer
#define SPI_CONTINUOUS BIT(11)
// Fixme: does this stuff really belong in serial.h?
// Power management registers
#define PM_CONTROL_REG 0
#define PM_BATTERY_REG 1
#define PM_AMPLIFIER_REG 2
#define PM_READ_REGISTER (1<<7)
// PM control register bits - power control
#define PM_SOUND_AMP BIT(0) // Power the sound hardware (needed to hear stuff in GBA mode too)
#define PM_SOUND_MUTE BIT(1) // Mute the main speakers, headphone output will still work.
#define PM_BACKLIGHT_BOTTOM BIT(2) // Enable the top backlight if set
#define PM_BACKLIGHT_TOP BIT(3) // Enable the bottom backlight if set
#define PM_SYSTEM_PWR BIT(6) // Turn the power *off* if set
#define PM_POWER_DOWN BIT(6) // Same thing, I like this name better tho
// PM control register bits - LED control
#define PM_LED_CONTROL(m) ((m)<<4) // ?
#define PM_LED_ON (0<<4) // Steady on
#define PM_LED_SLEEP (1<<4) // Blinking, mostly off
#define PM_LED_BLINK (3<<4) // Blinking, mostly on
#define PM_AMP_OFFSET 2
#define PM_AMP_ON 1
#define PM_AMP_OFF 0
// Fixme: does this stuff really belong in serial.h?
// Firmware commands
#define FIRMWARE_WREN 0x06
#define FIRMWARE_WRDI 0x04
#define FIRMWARE_RDID 0x9F
#define FIRMWARE_RDSR 0x05
#define FIRMWARE_READ 0x03
#define FIRMWARE_PW 0x0A
#define FIRMWARE_PP 0x02
#define FIRMWARE_FAST 0x0B
#define FIRMWARE_PE 0xDB
#define FIRMWARE_SE 0xD8
#define FIRMWARE_DP 0xB9
#define FIRMWARE_RDP 0xAB
static inline
void SerialWaitBusy(void) {
while (REG_SPICNT & SPI_BUSY)
swiDelay(1);
}
// Warning: These functions use the SPI chain, and are thus 'critical'
// sections, make sure to disable interrupts during the call if you've
// got a VBlank IRQ polling the touch screen, etc...
// Read/write a power management register
int writePowerManagement(int reg, int command);
static inline
int readPowerManagement(int reg) {
return writePowerManagement((reg)|PM_READ_REGISTER, 0);
}
// Read the firmware
void readFirmware(uint32 address, void * destination, uint32 size);
#endif
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