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Diffstat (limited to 'tmk_core/protocol/adb.c')
| -rw-r--r-- | tmk_core/protocol/adb.c | 535 |
1 files changed, 0 insertions, 535 deletions
diff --git a/tmk_core/protocol/adb.c b/tmk_core/protocol/adb.c deleted file mode 100644 index 367f1b09fa..0000000000 --- a/tmk_core/protocol/adb.c +++ /dev/null @@ -1,535 +0,0 @@ -/* -Copyright 2011-19 Jun WAKO <wakojun@gmail.com> -Copyright 2013 Shay Green <gblargg@gmail.com> - -This software is licensed with a Modified BSD License. -All of this is supposed to be Free Software, Open Source, DFSG-free, -GPL-compatible, and OK to use in both free and proprietary applications. -Additions and corrections to this file are welcome. - - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - -* Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in - the documentation and/or other materials provided with the - distribution. - -* Neither the name of the copyright holders nor the names of - contributors may be used to endorse or promote products derived - from this software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. -*/ - -#include <stdbool.h> -#include <util/delay.h> -#include <avr/io.h> -#include <avr/interrupt.h> -#include "adb.h" -#include "print.h" - -// GCC doesn't inline functions normally -#define data_lo() (ADB_DDR |= (1 << ADB_DATA_BIT)) -#define data_hi() (ADB_DDR &= ~(1 << ADB_DATA_BIT)) -#define data_in() (ADB_PIN & (1 << ADB_DATA_BIT)) - -#ifdef ADB_PSW_BIT -static inline void psw_lo(void); -static inline void psw_hi(void); -static inline bool psw_in(void); -#endif - -static inline void attention(void); -static inline void place_bit0(void); -static inline void place_bit1(void); -static inline void send_byte(uint8_t data); -static inline uint16_t wait_data_lo(uint16_t us); -static inline uint16_t wait_data_hi(uint16_t us); - -void adb_host_init(void) { - ADB_PORT &= ~(1 << ADB_DATA_BIT); - data_hi(); -#ifdef ADB_PSW_BIT - psw_hi(); -#endif -} - -#ifdef ADB_PSW_BIT -bool adb_host_psw(void) { return psw_in(); } -#endif - -/* - * Don't call this in a row without the delay, otherwise it makes some of poor controllers - * overloaded and misses strokes. Recommended interval is 12ms. - * - * Thanks a lot, blargg! - * <http://geekhack.org/index.php?topic=14290.msg1068919#msg1068919> - * <http://geekhack.org/index.php?topic=14290.msg1070139#msg1070139> - */ -uint16_t adb_host_kbd_recv(void) { return adb_host_talk(ADB_ADDR_KEYBOARD, ADB_REG_0); } - -#ifdef ADB_MOUSE_ENABLE -__attribute__((weak)) void adb_mouse_init(void) { return; } - -__attribute__((weak)) void adb_mouse_task(void) { return; } - -uint16_t adb_host_mouse_recv(void) { return adb_host_talk(ADB_ADDR_MOUSE, ADB_REG_0); } -#endif - -// This sends Talk command to read data from register and returns length of the data. -uint8_t adb_host_talk_buf(uint8_t addr, uint8_t reg, uint8_t *buf, uint8_t len) { - for (int8_t i = 0; i < len; i++) buf[i] = 0; - - cli(); - attention(); - send_byte((addr << 4) | ADB_CMD_TALK | reg); - place_bit0(); // Stopbit(0) - // TODO: Service Request(Srq): - // Device holds low part of comannd stopbit for 140-260us - // - // Command: - // ......._ ______________________ ___ ............_ ------- - // | | | | | | | - // Command | | | | | Data bytes | | - // ........|___| | 140-260 |__| |_............|___| - // |stop0 | Tlt Stop-to-Start |start1| |stop0 | - // - // Command without data: - // ......._ __________________________ - // | | - // Command | | - // ........|___| | 140-260 | - // |stop0 | Tlt Stop-to-Start | - // - // Service Request: - // ......._ ______ ___ ............_ ------- - // | 140-260 | | | | | | - // Command | Service Request | | | | Data bytes | | - // ........|___________________| |__| |_............|___| - // |stop0 | |start1| |stop0 | - // ......._ __________ - // | 140-260 | - // Command | Service Request | - // ........|___________________| - // |stop0 | - // This can be happened? - // ......._ ______________________ ___ ............_ ----- - // | | | | | | 140-260 | - // Command | | | | | Data bytes | Service Request | - // ........|___| | 140-260 |__| |_............|_________________| - // |stop0 | Tlt Stop-to-Start |start1| |stop0 | - // - // "Service requests are issued by the devices during a very specific time at the - // end of the reception of the command packet. - // If a device in need of service issues a service request, it must do so within - // the 65 µs of the Stop Bit’s low time and maintain the line low for a total of 300 µs." - // - // "A device sends a Service Request signal by holding the bus low during the low - // portion of the stop bit of any command or data transaction. The device must lengthen - // the stop by a minimum of 140 J.lS beyond its normal duration, as shown in Figure 8-15." - // http://ww1.microchip.com/downloads/en/AppNotes/00591b.pdf - if (!wait_data_hi(500)) { // Service Request(310us Adjustable Keyboard): just ignored - xprintf("R"); - sei(); - return 0; - } - if (!wait_data_lo(500)) { // Tlt/Stop to Start(140-260us) - sei(); - return 0; // No data from device(not error); - } - - // start bit(1) - if (!wait_data_hi(40)) { - xprintf("S"); - sei(); - return 0; - } - if (!wait_data_lo(100)) { - xprintf("s"); - sei(); - return 0; - } - - uint8_t n = 0; // bit count - do { - // - // |<- bit_cell_max(130) ->| - // | |<- lo ->| - // | | |<-hi->| - // _______ - // | | | - // | 130-lo | lo-hi | - // |________| | - // - uint8_t lo = (uint8_t)wait_data_hi(130); - if (!lo) goto error; // no more bit or after stop bit - - uint8_t hi = (uint8_t)wait_data_lo(lo); - if (!hi) goto error; // stop bit extedned by Srq? - - if (n / 8 >= len) continue; // can't store in buf - - buf[n / 8] <<= 1; - if ((130 - lo) < (lo - hi)) { - buf[n / 8] |= 1; - } - } while (++n); - -error: - sei(); - return n / 8; -} - -uint16_t adb_host_talk(uint8_t addr, uint8_t reg) { - uint8_t len; - uint8_t buf[8]; - len = adb_host_talk_buf(addr, reg, buf, 8); - if (len != 2) return 0; - return (buf[0] << 8 | buf[1]); -} - -void adb_host_listen_buf(uint8_t addr, uint8_t reg, uint8_t *buf, uint8_t len) { - cli(); - attention(); - send_byte((addr << 4) | ADB_CMD_LISTEN | reg); - place_bit0(); // Stopbit(0) - // TODO: Service Request - _delay_us(200); // Tlt/Stop to Start - place_bit1(); // Startbit(1) - for (int8_t i = 0; i < len; i++) { - send_byte(buf[i]); - // xprintf("%02X ", buf[i]); - } - place_bit0(); // Stopbit(0); - sei(); -} - -void adb_host_listen(uint8_t addr, uint8_t reg, uint8_t data_h, uint8_t data_l) { - uint8_t buf[2] = {data_h, data_l}; - adb_host_listen_buf(addr, reg, buf, 2); -} - -void adb_host_flush(uint8_t addr) { - cli(); - attention(); - send_byte((addr << 4) | ADB_CMD_FLUSH); - place_bit0(); // Stopbit(0) - _delay_us(200); // Tlt/Stop to Start - sei(); -} - -// send state of LEDs -void adb_host_kbd_led(uint8_t led) { - // Listen Register2 - // upper byte: not used - // lower byte: bit2=ScrollLock, bit1=CapsLock, bit0=NumLock - adb_host_listen(ADB_ADDR_KEYBOARD, ADB_REG_2, 0, led & 0x07); -} - -#ifdef ADB_PSW_BIT -static inline void psw_lo() { - ADB_DDR |= (1 << ADB_PSW_BIT); - ADB_PORT &= ~(1 << ADB_PSW_BIT); -} -static inline void psw_hi() { - ADB_PORT |= (1 << ADB_PSW_BIT); - ADB_DDR &= ~(1 << ADB_PSW_BIT); -} -static inline bool psw_in() { - ADB_PORT |= (1 << ADB_PSW_BIT); - ADB_DDR &= ~(1 << ADB_PSW_BIT); - return ADB_PIN & (1 << ADB_PSW_BIT); -} -#endif - -static inline void attention(void) { - data_lo(); - _delay_us(800 - 35); // bit1 holds lo for 35 more - place_bit1(); -} - -static inline void place_bit0(void) { - data_lo(); - _delay_us(65); - data_hi(); - _delay_us(35); -} - -static inline void place_bit1(void) { - data_lo(); - _delay_us(35); - data_hi(); - _delay_us(65); -} - -static inline void send_byte(uint8_t data) { - for (int i = 0; i < 8; i++) { - if (data & (0x80 >> i)) - place_bit1(); - else - place_bit0(); - } -} - -// These are carefully coded to take 6 cycles of overhead. -// inline asm approach became too convoluted -static inline uint16_t wait_data_lo(uint16_t us) { - do { - if (!data_in()) break; - _delay_us(1 - (6 * 1000000.0 / F_CPU)); - } while (--us); - return us; -} - -static inline uint16_t wait_data_hi(uint16_t us) { - do { - if (data_in()) break; - _delay_us(1 - (6 * 1000000.0 / F_CPU)); - } while (--us); - return us; -} - -/* -ADB Protocol -============ - -Resources ---------- -ADB - The Untold Story: Space Aliens Ate My Mouse - http://developer.apple.com/legacy/mac/library/#technotes/hw/hw_01.html -ADB Manager - http://developer.apple.com/legacy/mac/library/documentation/mac/pdf/Devices/ADB_Manager.pdf - Service request(5-17) -Apple IIgs Hardware Reference Second Edition [Chapter6 p121] - ftp://ftp.apple.asimov.net/pub/apple_II/documentation/Apple%20IIgs%20Hardware%20Reference.pdf -ADB Keycode - http://72.0.193.250/Documentation/macppc/adbkeycodes/ - http://m0115.web.fc2.com/m0115.jpg - [Inside Macintosh volume V, pages 191-192] - http://www.opensource.apple.com/source/IOHIDFamily/IOHIDFamily-421.18.3/IOHIDFamily/Cosmo_USB2ADB.c -ADB Signaling - http://kbdbabel.sourceforge.net/doc/kbd_signaling_pcxt_ps2_adb.pdf -ADB Overview & History - http://en.wikipedia.org/wiki/Apple_Desktop_Bus -Microchip Application Note: ADB device(with code for PIC16C) - http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en011062 -AVR ATtiny2131 ADB to PS/2 converter(Japanese) - http://hp.vector.co.jp/authors/VA000177/html/KeyBoardA5DEA5CBA5A2II.html - - -Pinouts -------- - ADB female socket from the front: - __________ - | | <--- top - | 4o o3 | - |2o o1| - | == | - |________| <--- bottom - | | <--- 4pins - - - ADB female socket from bottom: - - ========== <--- front - | | - | | - |2o o1| - |4o o3| - ---------- <--- back - - 1: Data - 2: Power SW(low when press Power key) - 3: Vcc(5V) - 4: GND - - -Commands --------- - ADB command is 1byte and consists of 4bit-address, 2bit-command - type and 2bit-register. The commands are always sent by Host. - - Command format: - 7 6 5 4 3 2 1 0 - | | | |------------ address - | |-------- command type - | |---- register - - bits commands - ------------------------------------------------------ - - - - - 0 0 0 0 Send Reset(reset all devices) - A A A A 0 0 0 1 Flush(reset a device) - - - - - 0 0 1 0 Reserved - - - - - 0 0 1 1 Reserved - - - - - 0 1 - - Reserved - A A A A 1 0 R R Listen(write to a device) - A A A A 1 1 R R Talk(read from a device) - - The command to read keycodes from keyboard is 0x2C which - consist of keyboard address 2 and Talk against register 0. - - Address: - 2: keyboard - 3: mice - - Registers: - 0: application(keyboard uses this to store its data.) - 1: application - 2: application(keyboard uses this for LEDs and state of modifiers) - 3: status and command - - -Communication -------------- - This is a minimum information for keyboard communication. - See "Resources" for detail. - - Signaling: - - ~~~~____________~~||||||||||||__~~~~~_~~|||||||||||||||__~~~~ - - |800us | |7 Command 0| | | |15-64 Data 0|Stopbit(0) - +Attention | | | +Startbit(1) - +Startbit(1) | +Tlt(140-260us) - +stopbit(0) - - Bit cells: - - bit0: ______~~~ - 65 :35us - - bit1: ___~~~~~~ - 35 :65us - - bit0 low time: 60-70% of bit cell(42-91us) - bit1 low time: 30-40% of bit cell(21-52us) - bit cell time: 70-130us - [from Apple IIgs Hardware Reference Second Edition] - - Criterion for bit0/1: - After 55us if line is low/high then bit is 0/1. - - Attention & start bit: - Host asserts low in 560-1040us then places start bit(1). - - Tlt(Stop to Start): - Bus stays high in 140-260us then device places start bit(1). - - Global reset: - Host asserts low in 2.8-5.2ms. All devices are forced to reset. - - Service request from device(Srq): - Device can request to send at commad(Global only?) stop bit. - Requesting device keeps low for 140-260us at stop bit of command. - - -Keyboard Data(Register0) - This 16bit data can contains two keycodes and two released flags. - First keycode is palced in upper byte. When one keyocode is sent, - lower byte is 0xFF. - Release flag is 1 when key is released. - - 1514 . . . . . 8 7 6 . . . . . 0 - | | | | | | | | | +-+-+-+-+-+-+- Keycode2 - | | | | | | | | +--------------- Released2(1 when the key is released) - | +-+-+-+-+-+-+----------------- Keycode1 - +------------------------------- Released1(1 when the key is released) - - Keycodes: - Scancode consists of 7bit keycode and 1bit release flag. - Device can send two keycodes at once. If just one keycode is sent - keycode1 contains it and keyocode2 is 0xFF. - - Power switch: - You can read the state from PSW line(active low) however - the switch has a special scancode 0x7F7F, so you can - also read from Data line. It uses 0xFFFF for release scancode. - -Keyboard LEDs & state of keys(Register2) - This register hold current state of three LEDs and nine keys. - The state of LEDs can be changed by sending Listen command. - - 1514 . . . . . . 7 6 5 . 3 2 1 0 - | | | | | | | | | | | | | | | +- LED1(NumLock) - | | | | | | | | | | | | | | +--- LED2(CapsLock) - | | | | | | | | | | | | | +----- LED3(ScrollLock) - | | | | | | | | | | +-+-+------- Reserved - | | | | | | | | | +------------- ScrollLock - | | | | | | | | +--------------- NumLock - | | | | | | | +----------------- Apple/Command - | | | | | | +------------------- Option - | | | | | +--------------------- Shift - | | | | +----------------------- Control - | | | +------------------------- Reset/Power - | | +--------------------------- CapsLock - | +----------------------------- Delete - +------------------------------- Reserved - -Address, Handler ID and bits(Register3) - 1514131211 . . 8 7 . . . . . . 0 - | | | | | | | | | | | | | | | | - | | | | | | | | +-+-+-+-+-+-+-+- Handler ID - | | | | +-+-+-+----------------- Address - | | | +------------------------- 0 - | | +--------------------------- Service request enable(1 = enabled) - | +----------------------------- Exceptional event(alwyas 1 if not used) - +------------------------------- 0 - -ADB Bit Cells - bit cell time: 70-130us - low part of bit0: 60-70% of bit cell - low part of bit1: 30-40% of bit cell - - bit cell time 70us 130us - -------------------------------------------- - low part of bit0 42-49 78-91 - high part of bit0 21-28 39-52 - low part of bit1 21-28 39-52 - high part of bit1 42-49 78-91 - - - bit0: - 70us bit cell: - ____________~~~~~~ - 42-49 21-28 - - 130us bit cell: - ____________~~~~~~ - 78-91 39-52 - - bit1: - 70us bit cell: - ______~~~~~~~~~~~~ - 21-28 42-49 - - 130us bit cell: - ______~~~~~~~~~~~~ - 39-52 78-91 - - [from Apple IIgs Hardware Reference Second Edition] - -Keyboard Handle ID - Apple Standard Keyboard M0116: 0x01 - Apple Extended Keyboard M0115: 0x02 - Apple Extended Keyboard II M3501: 0x02 - Apple Adjustable Keybaord: 0x10 - - http://lxr.free-electrons.com/source/drivers/macintosh/adbhid.c?v=4.4#L802 - -END_OF_ADB -*/ |