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Diffstat (limited to 'include/libnds/nds/arm7/serial.h')
| -rw-r--r-- | include/libnds/nds/arm7/serial.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/include/libnds/nds/arm7/serial.h b/include/libnds/nds/arm7/serial.h new file mode 100644 index 0000000000..9814ecaec0 --- /dev/null +++ b/include/libnds/nds/arm7/serial.h @@ -0,0 +1,165 @@ +/*--------------------------------------------------------------------------------- + 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 + |