core: Add adb_host_talk()
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tmk
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75854878cc
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d702fe7504
@ -60,7 +60,6 @@ static inline void place_bit1(void);
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static inline void send_byte(uint8_t data);
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static inline uint16_t wait_data_lo(uint16_t us);
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static inline uint16_t wait_data_hi(uint16_t us);
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static inline uint16_t adb_host_dev_recv(uint8_t device);
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void adb_host_init(void)
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@ -87,49 +86,9 @@ bool adb_host_psw(void)
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* <http://geekhack.org/index.php?topic=14290.msg1068919#msg1068919>
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* <http://geekhack.org/index.php?topic=14290.msg1070139#msg1070139>
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*/
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// ADB Bit Cells
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//
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// bit cell time: 70-130us
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// low part of bit0: 60-70% of bit cell
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// low part of bit1: 30-40% of bit cell
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//
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// bit cell time 70us 130us
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// --------------------------------------------
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// low part of bit0 42-49 78-91
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// high part of bit0 21-28 39-52
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// low part of bit1 21-28 39-52
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// high part of bit1 42-49 78-91
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//
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//
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// bit0:
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// 70us bit cell:
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// ____________~~~~~~
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// 42-49 21-28
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//
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// 130us bit cell:
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// ____________~~~~~~
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// 78-91 39-52
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//
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// bit1:
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// 70us bit cell:
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// ______~~~~~~~~~~~~
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// 21-28 42-49
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//
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// 130us bit cell:
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// ______~~~~~~~~~~~~
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// 39-52 78-91
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//
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// [from Apple IIgs Hardware Reference Second Edition]
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enum {
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ADDR_KEYB = 0x20,
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ADDR_MOUSE = 0x30
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};
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uint16_t adb_host_kbd_recv(void)
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{
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return adb_host_dev_recv(ADDR_KEYB);
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return adb_host_talk(ADB_ADDR_KEYBOARD, ADB_REG_0);
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}
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#ifdef ADB_MOUSE_ENABLE
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@ -139,16 +98,16 @@ void adb_mouse_init(void) {
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uint16_t adb_host_mouse_recv(void)
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{
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return adb_host_dev_recv(ADDR_MOUSE);
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return adb_host_talk(ADB_ADDR_MOUSE, ADB_REG_0);
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}
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#endif
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static inline uint16_t adb_host_dev_recv(uint8_t device)
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uint16_t adb_host_talk(uint8_t addr, uint8_t reg)
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{
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uint16_t data = 0;
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cli();
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attention();
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send_byte(device|0x0C); // Addr:Keyboard(0010)/Mouse(0011), Cmd:Talk(11), Register0(00)
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send_byte((addr<<4) | (ADB_CMD_TALK<<2) | reg);
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place_bit0(); // Stopbit(0)
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if (!wait_data_hi(500)) { // Service Request(310us Adjustable Keyboard): just ignored
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sei();
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@ -158,20 +117,20 @@ static inline uint16_t adb_host_dev_recv(uint8_t device)
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sei();
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return 0; // No data to send
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}
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uint8_t n = 17; // start bit + 16 data bits
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do {
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uint8_t lo = (uint8_t) wait_data_hi(130);
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if (!lo)
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goto error;
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uint8_t hi = (uint8_t) wait_data_lo(lo);
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if (!hi)
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goto error;
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hi = lo - hi;
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lo = 130 - lo;
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data <<= 1;
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if (lo < hi) {
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data |= 1;
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@ -205,7 +164,7 @@ void adb_host_listen(uint8_t cmd, uint8_t data_h, uint8_t data_l)
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place_bit0(); // Stopbit(0)
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_delay_us(200); // Tlt/Stop to Start
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place_bit1(); // Startbit(1)
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send_byte(data_h);
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send_byte(data_h);
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send_byte(data_l);
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place_bit0(); // Stopbit(0);
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sei();
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@ -375,7 +334,7 @@ Commands
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A A A A 1 1 R R Talk(read from a device)
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The command to read keycodes from keyboard is 0x2C which
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consist of keyboard address 2 and Talk against register 0.
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consist of keyboard address 2 and Talk against register 0.
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Address:
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2: keyboard
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@ -457,7 +416,7 @@ Keyboard Data(Register0)
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Keyboard LEDs & state of keys(Register2)
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This register hold current state of three LEDs and nine keys.
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The state of LEDs can be changed by sending Listen command.
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1514 . . . . . . 7 6 5 . 3 2 1 0
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| | | | | | | | | | | | | | | +- LED1(NumLock)
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| | | | | | | | | | | | | | +--- LED2(CapsLock)
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@ -474,5 +433,46 @@ Keyboard LEDs & state of keys(Register2)
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| +----------------------------- Delete
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+------------------------------- Reserved
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ADB Bit Cells
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bit cell time: 70-130us
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low part of bit0: 60-70% of bit cell
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low part of bit1: 30-40% of bit cell
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bit cell time 70us 130us
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--------------------------------------------
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low part of bit0 42-49 78-91
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high part of bit0 21-28 39-52
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low part of bit1 21-28 39-52
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high part of bit1 42-49 78-91
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bit0:
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70us bit cell:
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____________~~~~~~
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42-49 21-28
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130us bit cell:
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____________~~~~~~
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78-91 39-52
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bit1:
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70us bit cell:
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______~~~~~~~~~~~~
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21-28 42-49
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130us bit cell:
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______~~~~~~~~~~~~
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39-52 78-91
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[from Apple IIgs Hardware Reference Second Edition]
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Keyboard Handle ID
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Apple Standard Keyboard M0116: 0x01
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Apple Extended Keyboard M0115: 0x02
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Apple Extended Keyboard II M3501: 0x02
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Apple Adjustable Keybaord: 0x10
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http://lxr.free-electrons.com/source/drivers/macintosh/adbhid.c?v=4.4#L802
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END_OF_ADB
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*/
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@ -52,11 +52,29 @@ POSSIBILITY OF SUCH DAMAGE.
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#define ADB_CAPS 0x39
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/* ADB commands */
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#define ADB_ADDR_KEYBOARD 2
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#define ADB_ADDR_MOUSE 3
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#define ADB_CMD_LISTEN 2
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#define ADB_CMD_TALK 3
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#define ADB_REG_0 0
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#define ADB_REG_1 1
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#define ADB_REG_2 2
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#define ADB_REG_3 3
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/* ADB keyboard handle id */
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#define ADB_HANDLE_M0116 0x01
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#define ADB_HANDLE_M0115 0x02
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#define ADB_HANDLE_M3501 0x02
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#define ADB_HANDLE_M1242 0x10
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// ADB host
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void adb_host_init(void);
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bool adb_host_psw(void);
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uint16_t adb_host_kbd_recv(void);
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uint16_t adb_host_mouse_recv(void);
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uint16_t adb_host_talk(uint8_t addr, uint8_t reg);
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void adb_host_listen(uint8_t cmd, uint8_t data_h, uint8_t data_l);
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void adb_host_kbd_led(uint8_t led);
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void adb_mouse_task(void);
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