diff options
Diffstat (limited to 'hid/pico/src/ph_ps2_kbd.c')
| -rw-r--r-- | hid/pico/src/ph_ps2_kbd.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/hid/pico/src/ph_ps2_kbd.c b/hid/pico/src/ph_ps2_kbd.c new file mode 100644 index 00000000..f9e0caa3 --- /dev/null +++ b/hid/pico/src/ph_ps2_kbd.c @@ -0,0 +1,222 @@ +#include "ph_outputs.h" +#include "ph_ps2_phy.h" + +extern u8 ph_g_ps2_kbd_leds; +extern bool ph_g_ps2_kbd_online; + +ph_ps2_phy ph_ps2_kbd; +bool ph_ps2_kbd_scanning; +u32 ph_ps2_kbd_repeat_us; +u16 ph_ps2_kbd_delay_ms; +u8 ph_ps2_kbd_repeat = 0; +bool ph_ps2_kbd_repeatmod = false; +alarm_id_t ph_ps2_kbd_repeater; +s8 ph_ps2_is_ctrl = 0; + +u8 const ph_ps2_led2ps2[] = { 0, 4, 1, 5, 2, 6, 3, 7 }; +u8 const ph_ps2_mod2ps2[] = { 0x14, 0x12, 0x11, 0x1f, 0x14, 0x59, 0x11, 0x27 }; +u8 const ph_ps2_hid2ps2[] = { + 0x00, 0x00, 0xfc, 0x00, 0x1c, 0x32, 0x21, 0x23, 0x24, 0x2b, 0x34, 0x33, 0x43, 0x3b, 0x42, 0x4b, + 0x3a, 0x31, 0x44, 0x4d, 0x15, 0x2d, 0x1b, 0x2c, 0x3c, 0x2a, 0x1d, 0x22, 0x35, 0x1a, 0x16, 0x1e, + 0x26, 0x25, 0x2e, 0x36, 0x3d, 0x3e, 0x46, 0x45, 0x5a, 0x76, 0x66, 0x0d, 0x29, 0x4e, 0x55, 0x54, + 0x5b, 0x5d, 0x5d, 0x4c, 0x52, 0x0e, 0x41, 0x49, 0x4a, 0x58, 0x05, 0x06, 0x04, 0x0c, 0x03, 0x0b, + 0x83, 0x0a, 0x01, 0x09, 0x78, 0x07, 0x7c, 0x7e, 0x7e, 0x70, 0x6c, 0x7d, 0x71, 0x69, 0x7a, 0x74, + 0x6b, 0x72, 0x75, 0x77, 0x4a, 0x7c, 0x7b, 0x79, 0x5a, 0x69, 0x72, 0x7a, 0x6b, 0x73, 0x74, 0x6c, + 0x75, 0x7d, 0x70, 0x71, 0x61, 0x2f, 0x37, 0x0f, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38, 0x40, + 0x48, 0x50, 0x57, 0x5f +}; +u8 const ph_ps2_maparray = sizeof(ph_ps2_hid2ps2); +u32 const ph_ps2_repeats[] = { + 33333, 37453, 41667, 45872, 48309, 54054, 58480, 62500, + 66667, 75188, 83333, 91743, 100000, 108696, 116279, 125000, + 133333, 149254, 166667, 181818, 200000, 217391, 232558, 250000, + 270270, 303030, 333333, 370370, 400000, 434783, 476190, 500000 +}; +u16 const ph_ps2_delays[] = { 250, 500, 750, 1000 }; + +void ph_ps2_kbd_send(u8 byte) { + queue_try_add(&ph_ps2_kbd.qbytes, &byte); +} + +void ph_ps2_kbd_maybe_send_e0(u8 byte) { + if (byte == 0x46 || + (byte >= 0x49 && byte <= 0x52) || + byte == 0x54 || byte == 0x58 || + byte == 0x65 || byte == 0x66 || + byte >= 0x81) { + ph_ps2_kbd_send(0xe0); + } +} + +int64_t ph_ps2_repeat_callback() { + if (ph_ps2_kbd_repeat) { + if (ph_ps2_kbd_repeatmod) { + + if (ph_ps2_kbd_repeat > 3 && ph_ps2_kbd_repeat != 6) ph_ps2_kbd_send(0xe0); + ph_ps2_kbd_send(ph_ps2_mod2ps2[ph_ps2_kbd_repeat - 1]); + + } else { + + ph_ps2_kbd_maybe_send_e0(ph_ps2_kbd_repeat); + ph_ps2_kbd_send(ph_ps2_hid2ps2[ph_ps2_kbd_repeat]); + + } + + return ph_ps2_kbd_repeat_us; + } + + ph_ps2_kbd_repeater = 0; + return 0; +} + +int64_t ph_ps2_blink_callback() { + ph_g_ps2_kbd_leds = 0; + ph_ps2_kbd_send(0xaa); + return 0; +} + +void ph_ps2_kbd_reset() { + ph_ps2_kbd_scanning = true; + ph_ps2_kbd_repeat_us = 91743; + ph_ps2_kbd_delay_ms = 500; + ph_ps2_kbd_repeat = 0; + ph_g_ps2_kbd_leds = 7; + add_alarm_in_ms(500, ph_ps2_blink_callback, NULL, false); +} + +void ph_ps2_kbd_send_key(u8 key, bool state) { + if (PH_O_IS_KBD_PS2 && ph_ps2_kbd_scanning) { + if (key >= 0xe0 && key <= 0xe7) { + + if (key == 0xe0 || key == 0xe4) { + if (state) { + ph_ps2_is_ctrl++; + } else { + ph_ps2_is_ctrl--; + } + + if (ph_ps2_is_ctrl < 0 || ph_ps2_is_ctrl > 2) { + ph_ps2_is_ctrl = 0; + } + } + + key -= 0xe0; + + if (key > 2 && key != 5) { + ph_ps2_kbd_send(0xe0); + } + + if (state) { + ph_ps2_kbd_repeat = key + 1; + ph_ps2_kbd_repeatmod = true; + + if (ph_ps2_kbd_repeater) { + cancel_alarm(ph_ps2_kbd_repeater); + } + + ph_ps2_kbd_repeater = add_alarm_in_ms(ph_ps2_kbd_delay_ms, ph_ps2_repeat_callback, NULL, false); + } else { + if (ph_ps2_kbd_repeat == key + 1 && ph_ps2_kbd_repeatmod) { + ph_ps2_kbd_repeat = 0; + } + + ph_ps2_kbd_send(0xf0); + } + + ph_ps2_kbd_send(ph_ps2_mod2ps2[key]); + + } else if (key < ph_ps2_maparray) { + + if (key == 0x48) { + ph_ps2_kbd_repeat = 0; + + if (state) { + if (ph_ps2_is_ctrl) { + ph_ps2_kbd_send(0xe0); ph_ps2_kbd_send(0x7e); ph_ps2_kbd_send(0xe0); ph_ps2_kbd_send(0xf0); ph_ps2_kbd_send(0x7e); + } else { + ph_ps2_kbd_send(0xe1); ph_ps2_kbd_send(0x14); ph_ps2_kbd_send(0x77); ph_ps2_kbd_send(0xe1); + ph_ps2_kbd_send(0xf0); ph_ps2_kbd_send(0x14); ph_ps2_kbd_send(0xf0); ph_ps2_kbd_send(0x77); + } + } + } else { + ph_ps2_kbd_maybe_send_e0(key); + + if (state) { + ph_ps2_kbd_repeat = key; + ph_ps2_kbd_repeatmod = false; + + if (ph_ps2_kbd_repeater) { + cancel_alarm(ph_ps2_kbd_repeater); + } + + ph_ps2_kbd_repeater = add_alarm_in_ms(ph_ps2_kbd_delay_ms, ph_ps2_repeat_callback, NULL, false); + } else { + if (ph_ps2_kbd_repeat == key && !ph_ps2_kbd_repeatmod) { + ph_ps2_kbd_repeat = 0; + } + + ph_ps2_kbd_send(0xf0); + } + + ph_ps2_kbd_send(ph_ps2_hid2ps2[key]); + } + } + } +} + +void ph_ps2_kbd_receive(u8 byte, u8 prev_byte) { + switch (prev_byte) { + case 0xed: // Set LEDs + if (byte > 7) byte = 0; + ph_g_ps2_kbd_leds = ph_ps2_led2ps2[byte]; + break; + + case 0xf3: // Set typematic rate and delay + ph_ps2_kbd_repeat_us = ph_ps2_repeats[byte & 0x1f]; + ph_ps2_kbd_delay_ms = ph_ps2_delays[(byte & 0x60) >> 5]; + break; + + default: + switch (byte) { + case 0xff: // Reset + ph_ps2_kbd_reset(); + break; + + case 0xee: // Echo + ph_ps2_kbd_send(0xee); + return; + + case 0xf2: // Identify keyboard + ph_ps2_kbd_send(0xfa); + ph_ps2_kbd_send(0xab); + ph_ps2_kbd_send(0x83); + return; + + case 0xf4: // Enable scanning + ph_ps2_kbd_scanning = true; + break; + + case 0xf5: // Disable scanning, restore default parameters + case 0xf6: // Set default parameters + ph_ps2_kbd_scanning = byte == 0xf6; + ph_ps2_kbd_repeat_us = 91743; + ph_ps2_kbd_delay_ms = 500; + ph_ps2_kbd_repeat = 0; + ph_g_ps2_kbd_leds = 0; + break; + } + break; + } + + ph_ps2_kbd_send(0xfa); +} + +void ph_ps2_kbd_task(void) { + ph_ps2_phy_task(&ph_ps2_kbd); + ph_g_ps2_kbd_online = ph_ps2_kbd_scanning && ph_ps2_kbd.idle; +} + +void ph_ps2_kbd_init(u8 gpio) { + ph_ps2_phy_init(&ph_ps2_kbd, pio0, gpio, &ph_ps2_kbd_receive); + ph_ps2_kbd_reset(); +}
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