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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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How to Apply These Terms to Your New Programs
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<one line to give the program's name and a brief idea of what it does.>
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
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The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or school,
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For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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This is work in progress free software firmware for pinephone keyboard.
Enjoy!
~megi

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firmware/build.sh Executable file
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#!/bin/bash
set -e
rm -rf build
mkdir -p build
sdcc -mmcs51 --iram-size 256 --xram-size 2048 --code-size 0x6000 --code-loc 0x2000 --opt-code-size -I. main.c -o build/fw.ihx
makebin build/fw.ihx build/fw.bin
dd if=bootloader.bin of=build/fw.bin conv=notrunc &>/dev/null

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/**
* Pinephone Keyboard Firmware
*
* Copyright (C) 2021 Ondřej Jirman <megi@xff.cz>
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __EM85F684A_H__
#define __EM85F684A_H__
__sfr __at(0x87) PCON; // Power Control
__sfr __at(0xc0) RSTSC; // Reset Source
__sfr __at(0xbf) P0_PRST; // Peripheral Reset
__sfr __at(0xee) P0_WDTKEY; // WDT Key
__sfr __at(0xef) P0_WDTCR; // WDT Control Register
__sfr __at(0x88) TCON; // Timer Control
__sfr __at(0x89) TMOD; // Timer Mode
__sfr __at(0x8a) TL0; // Timer 0 Low Byte
__sfr __at(0x8b) TL1; // Timer 1 Low Byte
__sfr __at(0x8c) TH0; // Timer 0 High Byte
__sfr __at(0x8d) TH1; // Timer 1 High Byte
__sfr __at(0x8e) CKCON0; // Clock Control 0
__sfr __at(0x8f) CKCON1; // Clock Control 1 (LOWCLK)
__sfr __at(0xa8) IE; // Interrupt Enable
__sfr __at(0xb8) IP; // Interrupt Priority
__sfr __at(0x81) SP; // Stack Pointer
__sfr __at(0x82) DPL; // Data Pointer Low
__sfr __at(0x83) DPH; // Data Pointer High
__sfr __at(0x84) DPL1; // Data Pointer Low Byte 1
__sfr __at(0x85) DPH1; // Data Pointer High Byte 1
__sfr __at(0x86) PAGESW; // Page Switch
__sfr __at(0xd0) PSW0; // Program Status Word 0
__sfr __at(0xd8) PSW1; // Program Status Word 1
__sfr __at(0xe0) ACC; // Accumulator
__sfr __at(0xf0) B; // B Register
__sfr __at(0x98) SCON; // Serial Control
__sfr __at(0x99) SBUF; // Serial Data Buffer
__sfr __at(0x80) P5; // Port 5 Data Registers
__sfr __at(0x90) P6; // Port 6 Data Registers
__sfr __at(0xa0) P7; // Port 7 Data Registers
__sfr __at(0xb0) P8; // Port 8 Data Registers
__sfr __at(0xe8) P9; // Port 9 Data Registers
__sfr __at(0xf5) P0_PHCON1; // Pull-High Control 1
__sfr __at(0xf7) P0_PHDSC1; // Port High Drive/Sink Control 1
__sfr __at(0xf9) P0_P5M0; // Port 5 Configuration Mode 0 Registers
__sfr __at(0xfa) P0_P6M0; // Port 6 Configuration Mode 0 Registers
__sfr __at(0xfb) P0_P7M0; // Port 7 Configuration Mode 0 Registers
__sfr __at(0xfc) P0_P8M0; // Port 8 Configuration Mode 0 Registers
__sfr __at(0xfd) P0_PHCON0; // Pull-High Control 0
__sfr __at(0xff) P0_PHDSC0; // Port High Drive/Sink Control 0
__sfr __at(0xf9) P1_P9M0; // Port 9 Configuration Mode 0 Registers
__sfr __at(0xfd) P1_PHCON2; // Pull-High Control 2
__sfr __at(0xff) P1_PHDSC2; // Port High Drive/Sink Control 2
__sfr __at(0xe9) P0_FLKEY; // Flash Key
__sfr __at(0xea) P0_FLCR; // Flash Control Register
__sfr __at(0xeb) P0_FPKEY; // Enhanced Protection Key
__sfr __at(0xec) P0_EPPOINTL; // Enhanced Protection Point Low Byte
__sfr __at(0xed) P0_EPPOINTH; // Enhanced Protection Point High Byte
__sfr __at(0x91) P0_ADCS; // ADCS(ADC Channel Select)
__sfr __at(0x92) P0_ADCR1; // ADC Control Register 1
__sfr __at(0x93) P0_ADCR2; // ADC Control Register 2
__sfr __at(0x94) P0_ADDH; // ADDH (Converted value AD11~AD4 of ADC)
__sfr __at(0x95) P0_ADDL; // ADDH (Converted value AD11~AD4 of ADC)
__sfr __at(0xa9) P0_TC3CR1; // TC3CR1: Timer 3 Control Register 1
__sfr __at(0xaa) P0_TC3CR2; // TC3CR1: Timer 3 Control Register 2
__sfr __at(0xab) P0_TC3DA; // Timer 3 DATA Buffer A
__sfr __at(0xac) P0_TC3DB; // Timer 3 DATA Buffer B
__sfr __at(0x9a) P0_SPIRX; // SPI Receive Data Buffer Control Register
__sfr __at(0x9b) P0_SPIBUFPTR1; // SPI Read FIFO counter(pointer) Register 1
__sfr __at(0x9c) P0_SPIBUFPTR2; // SPI Read FIFO counter(pointer) Register 2
__sfr __at(0xa1) P0_SPICON1; // SPICON1: SPI Control Register 1
__sfr __at(0xa2) P0_SPICON2; // SPICON2: SPI Control Register 2
__sfr __at(0xa3) P0_SPITDBR; // SPITDBR: SPI Transmit Data Buffer Register
__sfr __at(0xa4) P0_SPIRDBR; // SPIRDBR: SPI Receive Data Buffer Register
__sfr __at(0xa5) P0_SPISR1; // SPISR1: SPI Status Register 1
__sfr __at(0xa6) P0_SPISR2; // SPISR1: SPI Status Register 2
__sfr __at(0xa7) P0_SPITX; // SPI Transmit Data Buffer Control Register
__sfr __at(0xae) P0_ICEN; // Input-Change Enable
__sfr __at(0xaf) P0_EEXSF; // Extended External Interrupt Status Flag.
__sfr __at(0xb1) P0_EIE1; // Extended Interrupt Enable 1
__sfr __at(0xb2) P0_EIE2; // Extended Interrupt Enable 2
__sfr __at(0xb3) P0_EIE3; // Extended Interrupt Enable 3
__sfr __at(0xb5) P0_EXEN; // External Interrupt Pin Enable.
__sfr __at(0xb6) P0_EIESC1; // External Interrupt Edge Select Control 1
__sfr __at(0xb7) P0_EIESC2; // External Interrupt Edge Select Control 2
__sfr __at(0xb9) P0_EIP1; // Extended Interrupt Priority 1
__sfr __at(0xba) P0_EIP2; // Extended Interrupt Priority 2
__sfr __at(0xbb) P0_EIP3; // Extended Interrupt Priority 3
__sfr __at(0xc1) P0_I2CACR1; // I2CA Status and Control Register 1
__sfr __at(0xc2) P0_I2CACR2; // I2CA Status and Control Register 2
__sfr __at(0xc3) P0_I2CASA; // I2CA Slave Address Register
__sfr __at(0xc4) P0_I2CADB; // I2CA Data Buffer Register
__sfr __at(0xc5) P0_I2CADAL; // I2CA Device Address Register L
__sfr __at(0xc6) P0_I2CADAH; // I2CA Device Address Register H
__sfr __at(0xc7) P0_I2CASF; // I2CA status flag
__sfr __at(0xcd) P0_DEVPD1; // Peripheral power down
__sfr __at(0xce) P0_DEVPD2; // Peripheral power down
__sfr __at(0xcf) P0_DEVPD3; // Peripheral power down
__sfr __at(0xd1) P0_SMBTO1; // SMbus Time Out 1 Register
__sfr __at(0xd2) P0_SMBTR1; // SMbus Timer reload 1 Register
__sfr __at(0xd3) P0_SMBTO2; // SMbus Time Out 2 Register
__sfr __at(0xd4) P0_SMBTR2; // SMbus Timer reload 2 Register
__sfr __at(0xd5) P0_SMBTO3; // SMbus Time Out 3 Register
__sfr __at(0xd6) P0_SMBTR3; // SMbus Timer reload 3 Register
__sfr __at(0xd7) P0_I2CBINT; // I2C interrupt status and control register
__sfr __at(0xd9) P0_I2CBCR1; // I2CB status and control register 1
__sfr __at(0xda) P0_I2CBCR2; // I2CB status and control register 2
__sfr __at(0xdb) P0_I2CBSA; // I2CB Slave Address Register
__sfr __at(0xdc) P0_I2CBDB; // I2CB Data Buffer Register
__sfr __at(0xdd) P0_I2CBDAL; // I2CB Device Address Register L
__sfr __at(0xde) P0_I2CBDAH; // I2CB Device Address Register H
__sfr __at(0xdf) P0_I2CBCR3; // I2CB status and control register 3
__sfr __at(0xe1) P0_I2CBCR4; // I2CB status and control register 4
__sfr __at(0xe2) P0_I2CBAUTOCNT; // I2C SCL auto-counter
__sfr __at(0xe3) P0_I2CBSCLFIR; // I2CB SCL digital filter
__sfr __at(0xe4) P0_I2CBSDAFIR; // I2CB SDA digital filter
__sfr __at(0xe5) P0_I2CBSTASU; // I2C start/stop setup time timing register
__sfr __at(0xe6) P0_I2CBSTADH; // I2C start/stop hold time timing register
__sfr __at(0x91) P1_IRCTEST; // IRC Test Control Register
__sfr __at(0xa1) P1_STBCNT; // IRC Stable Count Register
__sfr __at(0xa2) P1_IRCCTRL; // IRC Control Register
__sfr __at(0xa3) P1_RETRIMTIME; // IRC Re-Trim Period Register
__sfr __at(0xa4) P1_IRCFCVAL; // IRC FC Value Register
__sfr __at(0xa5) P1_IRCCAVAL; // IRC CA Value Register
__sfr __at(0xa6) P1_IRCFRVAL; // IRC FR Value Register
__sfr __at(0xa7) P1_AUTOTRIMSTA; // IRC Auto-Trim Status Register
__sfr __at(0xa9) P1_MTFCCTRL; // IRC Manual-Trim FC Value Control Register
__sfr __at(0xaa) P1_MTCACTRL; // IRC Manual-Trim CA Value Control Register
__sfr __at(0xab) P1_MTFRCTRL; // IRC Manual-Trim FR Value Control Register
__sfr __at(0xac) P1_SOFCNTL; // IRC SOF Count Low Byte Register
__sfr __at(0xad) P1_SOFCNTH; // IRC SOF Count Low Byte Register
__sfr __at(0xae) P1_UDCACKCTRL; // UDC ACK Interrupt Control Register
__sfr __at(0xaf) P1_EPASCTRL; // Endpoint Access Control Register
__sfr __at(0xb1) P1_UDCCTRL; // UDCCTRL: UDC Control Register
__sfr __at(0xb2) P1_UDCSTA; // UDC Status Register
__sfr __at(0xb3) P1_UDCCFSTA; // UDC Load Configuration Status Register
__sfr __at(0xb4) P1_UDCCFDATA; // UDC Load Configuration Data Register
__sfr __at(0xb5) P1_UDCINT0EN; // UDC Interrupt0 Enable Register
__sfr __at(0xb6) P1_UDCINT1EN; // UDC Interrupt1 Enable Register
__sfr __at(0xb7) P1_UDCINT2EN; // UDC Interrupt2 Enable Register
__sfr __at(0xb9) P1_UDCINT0STA; // UDC Interrupt0 Status Register
__sfr __at(0xba) P1_UDCINT1STA; // UDC Interrupt1 Status Register
__sfr __at(0xbb) P1_UDCINT2STA; // UDC Interrupt2 Status Register
__sfr __at(0xbc) P1_UDCEPCTRL; // Device End-point Control Register
__sfr __at(0xbd) P1_UDCEPBUF0CTRL; // Device End-point Buffer0 Control Register
__sfr __at(0xbe) P1_UDCEPBUF1CTRL; // Device End-point Buffer1 Control Register
__sfr __at(0xbf) P1_UDCEP0BUFDATA; // UDC Endpoint0 Data Register
__sfr __at(0xc1) P1_UDCEP1BUFDATA; // UDC Endpoint1 Data Register
__sfr __at(0xc2) P1_UDCEP2BUFDATA; // UDC Endpoint2 Data Register
__sfr __at(0xc3) P1_UDCEP3BUFDATA; // UDC Endpoint3 Data Register
__sfr __at(0xc4) P1_UDCEP4BUFDATA; // UDC Endpoint4 Data Register
__sfr __at(0xc5) P1_UDCBUFSTA; // UDC Buffer Status Register
__sfr __at(0xc9) P1_UDCEP1DATAINCNT; // UDC Endpoint1 Data In Count Register
__sfr __at(0xca) P1_UDCEP1DATAOUTCNT; // UDC Endpoint1 Data Out Count Register
__sfr __at(0xcb) P1_UDCEP2DATAINCNT; // UDC Endpoint2 Data In Count Register
__sfr __at(0xcc) P1_UDCEP2DATAOUTCNT; // UDC Endpoint2 Data Out Count Register
__sfr __at(0xcd) P1_UDCEP3DATAINCNT; // UDC Endpoint3 Data In Count Register
__sfr __at(0xce) P1_UDCEP3DATAOUTCNT; // UDC Endpoint3 Data Out Count Register
__sfr __at(0xcf) P1_UDCEP4DATAINCNT; // UDC Endpoint4 Data In Count Register
__sfr __at(0xd1) P1_UDCEP4DATAOUTCNT; // UDC Endpoint4 Data Out Count Register
__sfr __at(0xd2) P1_UDCEP1BUFDEPTH; // UDC Endpoint1 Buffer Depth Register
__sfr __at(0xd3) P1_UDCEP2BUFDEPTH; // UDC Endpoint2 Buffer Depth Register
__sfr __at(0xd4) P1_UDCEP3BUFDEPTH; // UDC Endpoint3 Buffer Depth Register
__sfr __at(0xd5) P1_UDCEP4BUFDEPTH; // UDC Endpoint4 Buffer Depth Register
__sfr __at(0xd6) P1_PHYTEST0; // PHY Test0 Mode Register
__sfr __at(0xd7) P1_PHYTEST1; // PHY Test1 Mode Register
__sfr __at(0xd9) P1_UDCRESCTRL; // UDC Response Control Register
__sfr __at(0xda) P1_USBCTRL; // UDC ACK Interrupt Control Register
__sfr __at(0xdb) P1_SE1CTL; // SE1 Control register
__sfr __at(0xdc) P1_PWMDTR; // PWMA Control Register
__sfr __at(0xdd) P1_PWMDTCR; // Dead Time Control Register
__sfr __at(0xde) P1_TMREN; // PWM Source Clock Control Register
__sfr __at(0xdf) P1_PWMSF; // PWM Status Flag
__sfr __at(0xe1) P1_PWMACR; // PWMA Control Register
__sfr __at(0xe2) P1_PRDAL; // Low Byte of PWMA Period
__sfr __at(0xe4) P1_DTAL; // Low Byte of PWMA Duty
__sfr __at(0xe6) P1_TMRAL; // Low Byte of PWMA Timer
__sfr __at(0xe9) P1_PWMBCR; // PWMB Control Register
__sfr __at(0xea) P1_PRDBL; // Low Byte of PWMB Period
__sfr __at(0xec) P1_DTBL; // Low Byte of PWMB Timer
__sfr __at(0xee) P1_TMRBL; // Low Byte of PWMB Timer
__sfr __at(0xf1) P1_PWMCCR; // PWMC Control Register
__sfr __at(0xf2) P1_PRDCL; // Low Byte of PWMC Period
__sfr __at(0xf4) P1_DTCL; // Low Byte of PWMB Timer
__sfr __at(0xf6) P1_TMRCL; // Low Byte of PWMB Timer
__sbit __at(0xc7) SWRSF; // Software Reset Force and Flag
__sbit __at(0xc2) WTSF; // Watchdog Reset Flag.
__sbit __at(0xc0) PORSF; // Power-On Flag
__sbit __at(0x8f) TF1; // Timer 1 Overflow Flag.
__sbit __at(0x8e) TR1; // Timer 1 Run Control.
__sbit __at(0x8d) TF0; // Timer 0 Overflow Flag.
__sbit __at(0x8c) TR0; // Timer 0 Run Control.
__sbit __at(0x8b) IE1; // External Interrupt 1 Status Flag
__sbit __at(0x8a) IT1; // External Interrupt 1 Type Select
__sbit __at(0x89) IE0; // External Interrupt 0 Status Flag
__sbit __at(0x88) IT0; // External Interrupt 0 Type Select
__sbit __at(0xaf) EA; // Enable All Interrupt
__sbit __at(0xae) ICIE; // Input-Change Interrupts
__sbit __at(0xac) ES0; // Enable UART Interrupt
__sbit __at(0xab) ET1; // Enable Timer 1 Interrupt
__sbit __at(0xaa) EX1; // Enable External Interrupt 1.
__sbit __at(0xa9) ET0; // Enable Timer 0 Interrupt
__sbit __at(0xa8) EX0; // Enable External Interrupt 0
__sbit __at(0xbe) PICIE; // Input-Change Interrupt Priority Control.
__sbit __at(0xbc) PS0; // UART Interrupt Priority Control.
__sbit __at(0xbb) PT1; // Timer 1 Interrupt Priority Control.
__sbit __at(0xba) PX1; // External Interrupt 1 Priority Control.
__sbit __at(0xb9) PT0; // Timer 0 Interrupt Priority Control.
__sbit __at(0xb8) PX0; // External Interrupt 0 Priority Control
__sbit __at(0xd7) CY; // Carry Flag.
__sbit __at(0xd6) AC; // Auxiliary Carry Flag
__sbit __at(0xd5) F0; // User Flag 0.
__sbit __at(0xd2) OV; // Overflow Flag.
__sbit __at(0xd1) F1; // User Flag 1
__sbit __at(0xd0) PARITY; // Parity Flag
__sbit __at(0xd8) SHSF; // System-Hold Flag
// GPIO port data register bits
__sbit __at(0x87) P57;
__sbit __at(0x86) P56;
__sbit __at(0x85) P55;
__sbit __at(0x84) P54;
__sbit __at(0x83) P53;
__sbit __at(0x82) P52;
__sbit __at(0x81) P51;
__sbit __at(0x80) P50;
__sbit __at(0x97) P67;
__sbit __at(0x96) P66;
__sbit __at(0x95) P65;
__sbit __at(0x94) P64;
__sbit __at(0x93) P63;
__sbit __at(0x92) P62;
__sbit __at(0x91) P61;
__sbit __at(0x90) P60;
__sbit __at(0xa7) P77;
__sbit __at(0xa6) P76;
__sbit __at(0xa5) P75;
__sbit __at(0xa4) P74;
__sbit __at(0xa3) P73;
__sbit __at(0xa2) P72;
__sbit __at(0xa1) P71;
__sbit __at(0xa0) P70;
__sbit __at(0xb7) P87;
__sbit __at(0xb6) P86;
__sbit __at(0xb5) P85;
__sbit __at(0xb4) P84;
__sbit __at(0xb3) P83;
__sbit __at(0xb2) P82;
__sbit __at(0xb1) P81;
__sbit __at(0xb0) P80;
__sbit __at(0xef) P97;
__sbit __at(0xee) P96;
__sbit __at(0xed) P95;
__sbit __at(0xec) P94;
__sbit __at(0xeb) P93;
__sbit __at(0xea) P92;
__sbit __at(0xe9) P91;
__sbit __at(0xe8) P90;
#define IRQ_EINT0 0 // External Interrupt 0
#define IRQ_TIMER0 1 // Timer0 Overflow
#define IRQ_EINT1 2 // External Interrupt 1
#define IRQ_TIMER1 3 // Timer1 Overflow
#define IRQ_UART0 4 // Serial Port 0
#define IRQ_PINCHANGE 6 // PIN CHANGE Interrupt 0
#define IRQ_SYSTEMHOLD 8 // System Hold Interrupt
#define IRQ_INT2_3 10 // External Interrupt 2~3
#define IRQ_SPI 11 // SPI Interrupt
#define IRQ_ADC 13 // ADC Conversion Complete
#define IRQ_TIMER2 14 // Timer2 Overflow
#define IRQ_PWMA 15 // PWMA Interrupt
#define IRQ_USB 17 // USB Interrupt
#define IRQ_I2CA 20 // I2CA Interrupt
#define IRQ_PWMB 23 // PWMB Interrupt
#define IRQ_PWMC 24 // PWMC Interrupt
#define IRQ_I2CB 28 // I2CB Interrupt
#endif

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/**
* Pinephone Keyboard Firmware
*
* Copyright (C) 2021 Ondřej Jirman <megi@xff.cz>
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <em85f684a.h>
#define BIT(n) (1u << (n))
// we just use this interrupt for wakeup from sleep on input change
void pinchange_interupt(void) __interrupt(IRQ_PINCHANGE)
{
// disable all input change interrupts
P0_ICEN = BIT(5);
}
#define T0_SET_TIMEOUT(n) { \
TL0 = 0x00; \
TH0 = (0x10000u - n) >> 8; \
TL0 = (0x10000u - n) & 0xff; \
}
#define delay_us(n) { \
TL0 = 0x00; \
TF0 = 0; \
TH0 = (0x10000u - 2 * n) >> 8; \
TL0 = (0x10000u - 2 * n) & 0xff; \
while (!TF0); \
}
// Keyboard has 12 columns and 6 rows directly connected to GPIOs.
//
// C1 P95
// C2 P96
// C3 P97
// C4 P50
// C5 P51
// C6 P52
// C7 P53
// C8 P54
// C9 P55
// C10 P56
// C11 P57
// C12 P80 (also USB IAP trigger when pulled low)
//
// R1 P60
// R2 P61
// R3 P62
// R4 P63
// R5 P64
// R6 P65
//
// INT P90
// SCL P92
// SDA P93
//
// We will want to keep keyboard controller asleep unless some key is
// pressed. If a key is pressed, the controller will continuously scan
// for further pressed keys. When all keys are released, the controller
// can go back to sleep.
//
// For this to work, we'll use port 6 ability to wake up the controller
// on change.
//
// During sleep:
// - all columns will be set to low state
// - all rows will have pull-up enabled
// - when user presses any key, row state will change to low and
// the controller will wake up
//
// During active state:
// - all columns will be put to hi-Z state, except for the currently
// scanned one, which will be in low state
// - state of rows will be read, and will indicate state of keys
// in the selected column (0 = pressed, 1 = not pressed)
//
// De-bouncing:
// - scanning will happen in 5ms intervals and only if the two
// consecutive scans match, will the result be considered valid
//
// Configure GPIO for keyboard key scanning
//
// Switch to idle state
//
// In this state we can use keyscan_idle_is_pressed() to detect whether
// any key is pressed, and switch to active mode via keyscan_active().
//
void keyscan_idle(void)
{
// enable output low on all columns (P9[7:5] P5[7:0] P8[0])
PAGESW = 0;
P5 = 0;
P8 &= 0xfe;
P9 &= 0x1f;
P0_P5M0 = 0x00;
P0_P8M0 &= 0xfe;
PAGESW = 1;
P1_P9M0 &= 0x1f;
// enable input change interrupt on port6 and clear the flag
P0_ICEN = BIT(5);
ICIE = 1;
}
uint8_t keyscan_idle_is_pressed(void)
{
return ~P6 & 0x3f;
}
//
// Switch to active mode.
//
// In this state, we can call keyscan_scan() to perform a scan.
//
void keyscan_active(void)
{
// put all columns to hi-Z (P9[7:5] P5[7:0] P8[0])
// disable input change interrupt
ICIE = 0;
PAGESW = 0;
P5 = 0;
P8 &= 0xfe;
P9 &= 0x1f;
P0_P5M0 = ~0x00u;
P0_P8M0 |= ~0xfeu;
PAGESW = 1;
P1_P9M0 |= ~0x1fu;
}
// XXX: we can debounce in the scan function too (3us?)
// 12 byte storage required
uint8_t keyscan_scan(uint8_t* res)
{
uint8_t pin, mask = 0, row;
// for each column:
// - output low on column
// - wait (for voltage to stabilize)
// - read rows
// - turn column back to hi-Z
PAGESW = 1;
for (pin = 5; pin <= 7; pin++) {
P1_P9M0 &= ~BIT(pin);
delay_us(10);
row = ~P6 & 0x3f;
mask |= row;
*res++ = row;
P1_P9M0 |= BIT(pin);
}
PAGESW = 0;
for (pin = 0; pin <= 7; pin++) {
P0_P5M0 &= ~BIT(pin);
delay_us(10);
row = ~P6 & 0x3f;
mask |= row;
*res++ = row;
P0_P5M0 |= BIT(pin);
}
P0_P8M0 &= ~BIT(0);
delay_us(10);
row = ~P6 & 0x3f;
mask |= row;
*res++ = row;
P0_P8M0 |= BIT(0);
return mask;
}
void ext_int_assert(void)
{
P90 = 0;
PAGESW = 1;
P1_P9M0 &= ~BIT(0);
}
void ext_int_deassert(void)
{
P90 = 0;
PAGESW = 1;
P1_P9M0 |= BIT(0);
}
#define I2C_N_REGS 16
static uint8_t i2c_transfer = 0x00;
static uint8_t i2c_addr = 0;
static uint8_t i2c_regs[I2C_N_REGS] = {0xaa, 0x55};
static uint8_t i2c_cmd[I2C_N_REGS];
static uint8_t i2c_cmd_len = 0;
static uint8_t go_boot = 0;
void i2c_b_interupt(void) __interrupt(IRQ_I2CB)
{
uint8_t saved_page = PAGESW;
uint8_t tmp;
PAGESW = 0;
// handle TX
if (P0_I2CBINT & BIT(7)) {
if (i2c_addr < 16)
P0_I2CBDB = i2c_regs[i2c_addr++];
else
P0_I2CBDB = 0xff;
P0_I2CBCR1 &= ~BIT(7); // clear data pending
P0_I2CBINT &= ~BIT(7);
}
// handle RX
if (P0_I2CBINT & BIT(6)) {
tmp = P0_I2CBDB;
if (i2c_cmd_len < 16)
i2c_cmd[i2c_cmd_len++] = tmp;
if (i2c_cmd_len) {
if (i2c_cmd[0] == 0xa0)
ext_int_assert();
else if (i2c_cmd[0] == 0xa1)
ext_int_deassert();
else if (i2c_cmd[0] == 0xa2)
go_boot = 1;
}
PAGESW = 0;
P0_I2CBCR1 &= ~BIT(7); // clear data pending
P0_I2CBINT &= ~BIT(6);
}
// handle stop condition
if (P0_I2CBINT & BIT(4)) {
i2c_addr = 0;
i2c_cmd_len = 0;
P0_I2CBINT &= ~BIT(4);
}
PAGESW = saved_page;
}
//
// Slave mode I2C for communication with the SoC
//
// - address is 0x15
// - 400kHz
// - interrupts are used to handle tx/rx/end of transaction (stop bit)
//
void i2c_slave_init(void)
{
PAGESW = 0;
// setup I2C B for slave mode
//P0_I2CBCR1 = 0x20;
//P0_I2CBCR2 = 0x07 << 1 | 0x01; // 400kHz mode, enable I2C B controller, enable
P0_I2CBCR1 = 0x00;
P0_I2CBCR2 = 0x07 << 1 | BIT(0); // 100kHz mode, enable I2C B controller, enable
// setup I2C address
P0_I2CBDAH = 0x00;
P0_I2CBDAL = 0x15;
P0_I2CBINT = BIT(5); // enable I2C B stop interrupt
P0_EIE3 |= BIT(5); // enable I2C B interrupt
}
void main(void)
{
uint8_t scan_active = 0;
PAGESW = 0;
// setup interrupts
EA = 0;
IE = 0;
P0_EIE1 = 0;
P0_EIE2 = 0;
P0_EIE3 = 0;
// set CPU clock to normal (high frequency) mode
// [7] = power down HS clock in low speed mode - 1: yes 0: no
// [2:1] = high speed clock pre-divider - 1: /4 2: /2 3: /1
// [0] = cpu clock mode 1: high speed mode 0: low speed mode
CKCON1 = (CKCON1 & ~0x87u) | 0x07; // 0x87
// set timer 1 and timer 0 clock source to sysclk/12 (2 MHz)
CKCON0 = 0x00;
// wait until high speed clock is stable
while (!(CKCON0 & BIT(1)));
// set both timers to 16-bit counter modes
TMOD = 0x11;
// timers clock is 2 MHz so we need to wait for 2000 ticks to get delay of 1ms
//T0_SET_TIMEOUT(2000);
// enable both timers
TCON = 0x50;
// setup watchdog (timer base is 8ms, prescaler sets up timeout /128 = ~1s)
P0_WDTCR = 0x87; // enable watchdog ~1s
P0_WDTKEY = 0x4e; // reset watchdog
// P0_WDTCR = 0x07; // disable watchdog ~1s
// P0_WDTKEY = 0xb1; // disable watchdog
// power down unused peripherlas
P0_DEVPD1 |= BIT(6) | BIT(5) | BIT(3) | BIT(1); // PWM A, timer 3, SPI, LVD
P0_DEVPD2 |= BIT(6) | BIT(3) | BIT(0); // PWM C, PWM B, I2C A
P0_DEVPD3 |= BIT(2) | BIT(1) | BIT(0); // PWM E, PWM D, PWM F
// keep UART, SPI, and I2C A in reset
//P0_PRST |= BIT(0) | BIT(2) | BIT(3);
// enable pullups only all port 6 pins and make those pins into input
PAGESW = 0;
P0_PHCON0 = 0x00;
P0_PHCON1 = 0xff; // port 6 pull-up enable
P0_P6M0 = 0xff; // port 6 input
PAGESW = 1;
P1_PHCON2 = 0x00;
// enable auto-tuning internal RC oscillator based on USB SOF packets
//P1_IRCCTRL &= ~BIT(1); // disable manual trim
i2c_slave_init();
// enable interrupts
EA = 1;
ext_int_deassert();
keyscan_idle();
while (1) {
if (go_boot) {
EA = 0;
__asm__("mov r6,#0x5a");
__asm__("mov r7,#0xe7");
__asm__("ljmp 0x0118");
}
if (scan_active) {
uint8_t active_rows = keyscan_scan(i2c_regs + 4);
if (!active_rows) {
scan_active = 0;
keyscan_idle();
// power down
//PCON |= BIT(1);
//__asm__("nop");
}
continue;
}
if (keyscan_idle_is_pressed()) {
scan_active = 1;
keyscan_active();
}
}
}

5
usb-flasher/build.sh Executable file
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#!/bin/bash
set -e
gcc -o kbprog-usb kbprog-usb.c

1
usb-flasher/fw.bin Symbolic link
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@ -0,0 +1 @@
../firmware/build/fw.bin

765
usb-flasher/kbprog-usb.c Normal file
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/**
* USB Programming tool for Pinephone keyboard
*
* Copyright (C) 2021 Ondřej Jirman <megi@xff.cz>
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// {{{ includes
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include <linux/usbdevice_fs.h>
#define DEBUG 1
#if DEBUG
#define debug(args...) printf(args)
#else
#define debug(args...)
#endif
// }}}
// {{{ utils
static void syscall_error(int is_err, const char* fmt, ...)
{
va_list ap;
if (!is_err)
return;
fprintf(stderr, "ERROR: ");
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, ": %s\n", strerror(errno));
exit(1);
}
static void error(const char* fmt, ...)
{
va_list ap;
fprintf(stderr, "ERROR: ");
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(1);
}
bool read_file(const char* path, char* buf, size_t size)
{
int fd;
ssize_t ret;
fd = open(path, O_RDONLY);
if (fd < 0)
return false;
ret = read(fd, buf, size);
close(fd);
if (ret < 0)
return false;
if (ret < size) {
buf[ret] = 0;
return true;
} else {
buf[size - 1] = 0;
return false;
}
}
static int open_usb_dev(uint16_t vid, uint16_t pid)
{
char path[256], buf[256];
struct dirent *e;
unsigned e_vid, e_pid, bus, dev;
int fd = -1, ret;
DIR* d;
d = opendir("/sys/bus/usb/devices");
syscall_error(d == NULL, "opendir(/sys/bus/usb/devices) failed");
while (true) {
errno = 0;
e = readdir(d);
syscall_error(e == NULL && errno, "readdir(/sys/bus/usb/devices) failed");
if (!e)
break;
if (!strcmp(e->d_name, ".") || !strcmp(e->d_name, ".."))
continue;
snprintf(path, sizeof path,
"/sys/bus/usb/devices/%s/idVendor", e->d_name);
if (!read_file(path, buf, sizeof buf))
continue;
ret = sscanf(buf, "%x", &e_vid);
if (ret != 1)
error("Failed to parse %s", path);
snprintf(path, sizeof path,
"/sys/bus/usb/devices/%s/idProduct", e->d_name);
if (!read_file(path, buf, sizeof buf))
continue;
ret = sscanf(buf, "%x", &e_pid);
if (ret != 1)
error("Failed to parse %s", path);
if (e_vid == vid && e_pid == pid) {
snprintf(path, sizeof path,
"/sys/bus/usb/devices/%s/busnum", e->d_name);
if (!read_file(path, buf, sizeof buf))
error("Failed to read %s", path);
ret = sscanf(buf, "%u", &bus);
if (ret != 1)
error("Failed to parse %s", path);
snprintf(path, sizeof path,
"/sys/bus/usb/devices/%s/devnum", e->d_name);
if (!read_file(path, buf, sizeof buf))
error("Failed to read %s", path);
ret = sscanf(buf, "%u", &dev);
if (ret != 1)
error("Failed to parse %s", path);
snprintf(path, sizeof path,
"/dev/bus/usb/%03u/%03u", bus, dev);
debug("Found %04x:%04x at %s\n", e_vid, e_pid, path);
fd = open(path, O_RDWR);
syscall_error(fd < 0, "open(%s) failed", path);
break;
}
}
errno = ENOENT;
closedir(d);
return fd;
}
int bootloader_open(void)
{
int ret, fd;
bool had_switch = false;
// first check if keyboard USB device is available, if it is
// we need to first switch to bootloader mode
fd = open_usb_dev(0x04f3, 0x1812);
if (fd >= 0) {
for (unsigned i = 0; i <= 1; i++) {
struct usbdevfs_disconnect_claim dc = {
.interface = i,
};
ret = ioctl(fd, USBDEVFS_DISCONNECT_CLAIM, &dc);
syscall_error(ret < 0, "USBDEVFS_DISCONNECT_CLAIM failed");
}
/*
* Bootloader mode is enabled via HID SET_REPORT:SET_FEATURE
* control transfer on EP0.
*/
/* Enter IAP command payload */
uint8_t buf[8] = {
0xbc,
0x01,
};
struct usbdevfs_ctrltransfer ctrl = {
.bRequestType =
(0u << 7) // host->device
| (1u << 5) // class command
| (1u << 0), // to interface
.bRequest = 0x09, // HID SET_REPORT class command
.wValue = 0x03bc, // HID SET_FEATURE sub-command / 0xbc = enter IAP
.wIndex = 0,
.wLength = 8,
.timeout = 300,
.data = buf,
};
ret = ioctl(fd, USBDEVFS_CONTROL, &ctrl);
if (ret == 0)
error("Failed to switch keyboard to IAP programming mode");
had_switch = true;
close(fd);
}
// open the bootloader USB device (wait for it if we just switched to bootloader mode)
for (int i = 0;; i++) {
fd = open_usb_dev(0x04f3, 0x0905);
if (fd >= 0)
break;
if (!had_switch)
error("Bootloader USB device not found");
if (i > 16)
error("Bootloader USB device did not appear after switching keyboard to IAP mode");
usleep(250000);
}
for (unsigned i = 0; i <= 3; i++) {
struct usbdevfs_disconnect_claim dc = {
.interface = i,
};
ret = ioctl(fd, USBDEVFS_DISCONNECT_CLAIM, &dc);
syscall_error(ret < 0, "USBDEVFS_DISCONNECT_CLAIM failed");
}
return fd;
}
// Bootloader endpoints:
enum {
EP_CMD = 0x01,
EP_STATUS = 0x82,
EP_DATAOUT = 0x03,
EP_DATAIN = 0x84,
};
static int bootloader_fd = -1;
void bootloader_command(uint8_t req[8])
{
int ret;
struct usbdevfs_urb* reaped_urb;
struct usbdevfs_urb urb = {
.type = USBDEVFS_URB_TYPE_INTERRUPT,
.endpoint = EP_CMD,
.flags = USBDEVFS_URB_ZERO_PACKET,
.buffer = req,
.buffer_length = 8,
.actual_length = 8,
};
ret = ioctl(bootloader_fd, USBDEVFS_SUBMITURB, &urb);
syscall_error(ret < 0, "USBDEVFS_SUBMITURB failed");
ret = ioctl(bootloader_fd, USBDEVFS_REAPURB, &reaped_urb);
syscall_error(ret < 0, "USBDEVFS_REAPURB failed");
debug("CMD:");
for (int i = 0; i < urb.actual_length; i++)
debug(" %02hhx", req[i]);
debug("\n");
}
void bootloader_status(uint8_t res[4])
{
int ret;
struct usbdevfs_urb* reaped_urb;
struct usbdevfs_urb urb = {
.type = USBDEVFS_URB_TYPE_INTERRUPT,
.endpoint = EP_STATUS,
.flags = USBDEVFS_URB_SHORT_NOT_OK,
.buffer = res,
.buffer_length = 4,
.actual_length = 0,
};
ret = ioctl(bootloader_fd, USBDEVFS_SUBMITURB, &urb);
syscall_error(ret < 0, "USBDEVFS_SUBMITURB failed");
ret = ioctl(bootloader_fd, USBDEVFS_REAPURB, &reaped_urb);
syscall_error(ret < 0, "USBDEVFS_REAPURB failed");
debug("RES:");
for (int i = 0; i < urb.actual_length; i++)
debug(" %02hhx", res[i]);
debug("\n");
}
enum {
STATUS_READY = 1,
STATUS_BUSY = 2,
STATUS_SUCCESS = 3,
STATUS_FAIL = 4,
STATUS_ERROR = 5,
};
void bootloader_standard_status_check(void)
{
uint8_t res[4];
const char* msg = "Unknown";
bootloader_status(res);
uint16_t status = res[0] << 8 | res[1];
uint8_t err = res[2];
switch (status) {
case STATUS_BUSY:
printf("Busy\n");
break;
case STATUS_FAIL:
error("Fail status returned");
case STATUS_ERROR:
switch (err) {
case 0x1: msg = "Command is unknown"; break;
case 0x2: msg = "Command stage is error"; break;
case 0x3: msg = "Data stage is error"; break;
case 0x4: msg = "ROM address is error"; break;
case 0x5: msg = "Authority Key is incorrect"; break;
case 0x6: msg = "Write ROM is not finish"; break;
case 0x7: msg = "Write Option is not finish"; break;
case 0x8: msg = "Length is over"; break;
case 0x9: msg = "Length is less"; break;
case 0xa: msg = "CheckSum is incorrect"; break;
case 0xb: msg = "Write Flash is abnormal"; break;
case 0xc: msg = "It is over ROM area"; break;
case 0xd: msg = "ROM page is error"; break;
case 0xe: msg = "Flash Key is error"; break;
case 0xf: msg = "Option ROM address range error"; break;
}
error("Error status returned: %s", msg);
}
}
int bootloader_read_data(uint8_t res[64])
{
int ret;
struct usbdevfs_urb* reaped_urb;
struct usbdevfs_urb urb = {
.type = USBDEVFS_URB_TYPE_INTERRUPT,
.endpoint = EP_DATAIN,
.flags = USBDEVFS_URB_SHORT_NOT_OK,
.buffer = res,
.buffer_length = 64,
.actual_length = 0,
// .usercontext = (void*)(uintptr_t)0,
};
ret = ioctl(bootloader_fd, USBDEVFS_SUBMITURB, &urb);
syscall_error(ret < 0, "USBDEVFS_SUBMITURB failed");
ret = ioctl(bootloader_fd, USBDEVFS_REAPURB, &reaped_urb);
syscall_error(ret < 0, "USBDEVFS_REAPURB failed");
debug("DATA:");
for (int i = 0; i < urb.actual_length; i++)
debug(" %02hhx", res[i]);
debug("\n");
return urb.actual_length;
}
void bootloader_write_data(uint8_t res[64])
{
int ret;
struct usbdevfs_urb* reaped_urb;
struct usbdevfs_urb urb = {
.type = USBDEVFS_URB_TYPE_INTERRUPT,
.endpoint = EP_DATAOUT,
.flags = 0,
.buffer = res,
.buffer_length = 64,
.actual_length = 64,
// .usercontext = (void*)(uintptr_t)0,
};
ret = ioctl(bootloader_fd, USBDEVFS_SUBMITURB, &urb);
syscall_error(ret < 0, "USBDEVFS_SUBMITURB failed");
ret = ioctl(bootloader_fd, USBDEVFS_REAPURB, &reaped_urb);
syscall_error(ret < 0, "USBDEVFS_REAPURB failed");
debug("DATA:");
for (int i = 0; i < urb.actual_length; i++)
debug(" %02hhx", res[i]);
debug("\n");
}
#define CMD_TAG 0xc1
#define CMD_GETVERSPEC 0x40
#define CMD_GETVERFW 0x41
#define CMD_GETSTATUS 0x42
#define CMD_EXITAUTHMODE 0x43
#define CMD_GETAUTHLOCK 0x44
#define CMD_SETAUTHLOCK 0x45
#define CMD_ABORT 0x46
#define CMD_GETCHECKSUM 0x47
#define CMD_ENTRYIAP 0x20
#define CMD_FINISHEDIAP 0x21
#define CMD_CANCELIAP 0x23
#define CMD_SOFTWARERESET 0x24
#define CMD_BOOTCONDITION 0x25
#define CMD_WRITEROM 0xa0
#define CMD_WRITEROMFINISH 0xa1
#define CMD_WRITEOPTION 0xa2
#define CMD_WRITEOPTIONFINISH 0xa3
#define CMD_WRITECHECKSUM 0xa4
/*
* - called from WriteOptData in some cases (getVerSpec >= 0x170) or A chips
* - we probably don't need this?
*/
#define CMD_WRITECUSTOMINFO 0xa5 // 3:addr_l=0 4:addr_h=1 5:len_l 6:len_h 7:0xa9 8 :0x7f (sec key)
#define CMD_WRITECUSTOMINFOFINISH 0xa6 // 3:csum
#define CMD_READROM 0xe0
#define CMD_READROMFINISH 0xe1
#define CMD_READOPTION 0xe2
#define CMD_READOPTIONFINISH 0xe3
#define CMD_READDATAREQUEST 0xe4 // not implemented
#define AUTH_KEY [6] = 0xa9, [7] = 0x7f
uint16_t cmd_get_ver_spec(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_GETVERSPEC, });
uint8_t res[4];
bootloader_status(res);
return res[0] << 8 | res[1];
}
uint16_t cmd_get_ver_fw(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_GETVERFW, });
uint8_t res[4];
bootloader_status(res);
return res[0] << 8 | res[1];
}
enum {
DEV_STATUS_IDLE = 1,
DEV_STATUS_IAP,
DEV_STATUS_WR_ROM,
DEV_STATUS_WR_OPT,
DEV_STATUS_WR_CSUM,
DEV_STATUS_RD_ROM,
DEV_STATUS_RD_OPT,
};
uint8_t cmd_get_status(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_GETSTATUS, });
uint8_t res[4];
bootloader_status(res);
return res[2];
}
void cmd_exit_auth_mode(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_EXITAUTHMODE, });
bootloader_standard_status_check();
}
/* returns AUTHKEY */
uint8_t cmd_get_auth_lock(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_GETAUTHLOCK, });
uint8_t res[4];
bootloader_status(res);
return res[0] ^ 0x24;
}
/* expects AUTHKEY */
void cmd_set_auth_lock(uint8_t key)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_SETAUTHLOCK, key ^ 0x58, });
bootloader_standard_status_check();
}
void cmd_abort(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_ABORT, });
bootloader_standard_status_check();
}
void cmd_unlock(void)
{
cmd_set_auth_lock(cmd_get_auth_lock());
}
enum {
CHECKSUM_TYPE_BOOT = 0,
CHECKSUM_TYPE_MAIN = 1,
CHECKSUM_TYPE_ALL = 2, // may not work
};
uint16_t cmd_get_checksum(uint8_t type)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_GETCHECKSUM, type, });
uint8_t res[4];
bootloader_status(res);
return res[0] << 8 | res[1];
}
void cmd_entry_iap(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_ENTRYIAP, AUTH_KEY, });
bootloader_standard_status_check();
}
void cmd_finished_iap(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_FINISHEDIAP, AUTH_KEY, });
bootloader_standard_status_check();
}
void cmd_cancel_iap(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_CANCELIAP, });
bootloader_standard_status_check();
}
void cmd_software_reset(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_SOFTWARERESET, });
bootloader_standard_status_check();
}
enum {
BOOT_COND1_P80_ENTRY = 1,
BOOT_COND1_NO_APP_ENTRY = 2,
BOOT_COND1_APP_JUMP_ENTRY = 4,
};
uint8_t cmd_boot_condition(void)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_BOOTCONDITION, });
uint8_t res[4];
bootloader_status(res);
return res[2];
}
void cmd_read_option(uint8_t opts[128])
{
uint16_t addr = 128;
uint16_t len = 128;
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_READOPTION,
addr & 0xff, addr >> 8,
len & 0xff, len >> 8, });
bootloader_standard_status_check();
bootloader_read_data(opts);
bootloader_read_data(opts + 64);
uint8_t csum = 0;
for (int i = 0; i < len; i++)
csum += opts[i];
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_READOPTIONFINISH, csum, });
bootloader_standard_status_check();
}
void cmd_read_rom(uint8_t* data, uint16_t addr, uint16_t len)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_READROM,
addr & 0xff, addr >> 8,
len & 0xff, len >> 8, });
bootloader_standard_status_check();
for (int i = 0; i < len / 64; i++)
bootloader_read_data(data + 64 * i);
uint8_t csum = 0;
for (int i = 0; i < len; i++)
csum += data[i];
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_READROMFINISH, csum, });
bootloader_standard_status_check();
}
void cmd_write_rom(uint8_t* data, uint16_t addr, uint16_t len)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_WRITEROM,
addr & 0xff, addr >> 8,
len & 0xff, len >> 8,
AUTH_KEY, });
bootloader_standard_status_check();
for (int i = 0; i < len / 64; i++)
bootloader_write_data(data + 64 * i);
uint8_t csum = 0;
for (int i = 0; i < len; i++)
csum += data[i];
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_WRITEROMFINISH, csum, });
bootloader_standard_status_check();
}
// risky function, cmd_write_option(opts, 0x80, 128)
void cmd_write_option(uint8_t* data, uint16_t addr, uint16_t len)
{
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_WRITEOPTION,
addr & 0xff, addr >> 8,
len & 0xff, len >> 8,
AUTH_KEY, });
bootloader_standard_status_check();
for (int i = 0; i < len / 64; i++)
bootloader_write_data(data + 64 * i);
uint8_t csum = 0;
for (int i = 0; i < len; i++)
csum += data[i];
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_WRITEOPTIONFINISH, csum, });
bootloader_standard_status_check();
}
// writes checksum into the correct location in the option eeprom
void cmd_write_checksum(uint16_t csum)
{
uint16_t addr = 0xfc;
bootloader_command((uint8_t[8]) { CMD_TAG, CMD_WRITECHECKSUM,
addr & 0xff, addr >> 8,
csum & 0xff, csum >> 8,
AUTH_KEY, });
bootloader_standard_status_check();
}
// }}}
const char* dev_status_text(uint8_t status)
{
switch (status) {
case DEV_STATUS_IDLE: return "Idle";
case DEV_STATUS_IAP: return "IAP";
case DEV_STATUS_WR_ROM: return "Write ROM";
case DEV_STATUS_WR_OPT: return "Write Option";
case DEV_STATUS_WR_CSUM: return "Write Checksum";
case DEV_STATUS_RD_ROM: return "Read ROM";
case DEV_STATUS_RD_OPT: return "Read Option";
default: return "None";
}
}
const char* boot_cond_text(uint8_t status)
{
switch (status) {
case BOOT_COND1_P80_ENTRY: return "P80";
case BOOT_COND1_NO_APP_ENTRY: return "NO APP";
case BOOT_COND1_APP_JUMP_ENTRY: return "APP JUMP";
default: return "Unknown";
}
}
int main(int ac, char* av[])
{
bootloader_fd = bootloader_open();
cmd_abort();
printf("FW=0x%04hx BOOT=0x%04hx\n", cmd_get_ver_fw(), cmd_get_ver_spec());
uint8_t opts[128];
cmd_read_option(opts);
uint16_t icid = (opts[124] | opts[125] << 8) ^ (opts[121] | opts[122] << 8);
printf("ICID=%04hx\n", icid);
cmd_unlock();
uint8_t bootcond = cmd_boot_condition();
printf("Booted via %s\n", boot_cond_text(bootcond));
uint16_t csum_boot = cmd_get_checksum(CHECKSUM_TYPE_BOOT);
uint16_t csum_app = cmd_get_checksum(CHECKSUM_TYPE_MAIN);
printf("Checksums: boot=%04hx app=%04hx\n", csum_boot, csum_app);
/*
* Checksums: boot=d355 app=449b
*
* Option ROM from factory:
*
* CODE0 at 116: 0xff
* - 24MHz intosc mode, WDT disabled, 256kHz low freq mode
* CODE3 at 119: 0xff
* - eeprom and hw reset disabled
* - BITS(2..0) = reset button config
* - BIT(3) = eeprom enable
*
* 0: fc 39 01 7f
* 4: fe ff ff ff
*
* ...: ff ff ff ff
*
* 120: df // read by bootloader & 0x6 = 0x6: 24MHz,
* 121: 0a 4f // part of ICID (ICID is this value XORed with CSUM at 124, wtf?)
* 123: 20 // ???
* 124: 9b 44 // checksum (written by CMD_WRITECHECKSUM)
* 126: 49 // ???
* 127: aa // app OK flag (0xaa = ok)
*/
int fd;
uint8_t rom[0x8000];
memset(rom, 0xff, sizeof rom);
fd = open("fw.bin", O_RDONLY);
syscall_error(fd < 0, "open(fw.bin) failed");
ssize_t len = read(fd, rom, 0x8000);
close(fd);
if (len != 0x8000)
error("Invalid rom size, must be 32768 bytes");
cmd_entry_iap();
cmd_write_rom(rom + 0x2000, 0x2000, 0x600);
cmd_finished_iap();
cmd_read_rom(rom, 0, 0x8000);
fd = open("rom.bin", O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (fd >= 0) {
write(fd, rom, 0x8000);
close(fd);
}
cmd_software_reset();
return 0;
}