summaryrefslogtreecommitdiffstats
path: root/drivers/ps2
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ps2')
-rw-r--r--drivers/ps2/ps2.h139
-rw-r--r--drivers/ps2/ps2_busywait.c187
-rw-r--r--drivers/ps2/ps2_interrupt.c340
-rw-r--r--drivers/ps2/ps2_io.h11
-rw-r--r--drivers/ps2/ps2_mouse.c270
-rw-r--r--drivers/ps2/ps2_mouse.h177
6 files changed, 1124 insertions, 0 deletions
diff --git a/drivers/ps2/ps2.h b/drivers/ps2/ps2.h
new file mode 100644
index 0000000000..f123192852
--- /dev/null
+++ b/drivers/ps2/ps2.h
@@ -0,0 +1,139 @@
+/*
+Copyright 2010,2011,2012,2013 Jun WAKO <wakojun@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.
+*/
+
+#pragma once
+
+#include <stdbool.h>
+#include "wait.h"
+#include "ps2_io.h"
+#include "print.h"
+
+/*
+ * Primitive PS/2 Library for AVR
+ *
+ * PS/2 Resources
+ * --------------
+ * [1] The PS/2 Mouse/Keyboard Protocol
+ * http://www.computer-engineering.org/ps2protocol/
+ * Concise and thorough primer of PS/2 protocol.
+ *
+ * [2] Keyboard and Auxiliary Device Controller
+ * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
+ * Signal Timing and Format
+ *
+ * [3] Keyboards(101- and 102-key)
+ * http://www.mcamafia.de/pdf/ibm_hitrc11.pdf
+ * Keyboard Layout, Scan Code Set, POR, and Commands.
+ *
+ * [4] PS/2 Reference Manuals
+ * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
+ * Collection of IBM Personal System/2 documents.
+ *
+ * [5] TrackPoint Engineering Specifications for version 3E
+ * https://web.archive.org/web/20100526161812/http://wwwcssrv.almaden.ibm.com/trackpoint/download.html
+ */
+#define PS2_ACK 0xFA
+#define PS2_RESEND 0xFE
+#define PS2_SET_LED 0xED
+
+// TODO: error numbers
+#define PS2_ERR_NONE 0
+#define PS2_ERR_STARTBIT1 1
+#define PS2_ERR_STARTBIT2 2
+#define PS2_ERR_STARTBIT3 3
+#define PS2_ERR_PARITY 0x10
+#define PS2_ERR_NODATA 0x20
+
+#define PS2_LED_SCROLL_LOCK 0
+#define PS2_LED_NUM_LOCK 1
+#define PS2_LED_CAPS_LOCK 2
+
+extern uint8_t ps2_error;
+
+void ps2_host_init(void);
+uint8_t ps2_host_send(uint8_t data);
+uint8_t ps2_host_recv_response(void);
+uint8_t ps2_host_recv(void);
+void ps2_host_set_led(uint8_t usb_led);
+
+/*--------------------------------------------------------------------
+ * static functions
+ *------------------------------------------------------------------*/
+static inline uint16_t wait_clock_lo(uint16_t us) {
+ while (clock_in() && us) {
+ asm("");
+ wait_us(1);
+ us--;
+ }
+ return us;
+}
+static inline uint16_t wait_clock_hi(uint16_t us) {
+ while (!clock_in() && us) {
+ asm("");
+ wait_us(1);
+ us--;
+ }
+ return us;
+}
+static inline uint16_t wait_data_lo(uint16_t us) {
+ while (data_in() && us) {
+ asm("");
+ wait_us(1);
+ us--;
+ }
+ return us;
+}
+static inline uint16_t wait_data_hi(uint16_t us) {
+ while (!data_in() && us) {
+ asm("");
+ wait_us(1);
+ us--;
+ }
+ return us;
+}
+
+/* idle state that device can send */
+static inline void idle(void) {
+ clock_hi();
+ data_hi();
+}
+
+/* inhibit device to send */
+static inline void inhibit(void) {
+ clock_lo();
+ data_hi();
+}
diff --git a/drivers/ps2/ps2_busywait.c b/drivers/ps2/ps2_busywait.c
new file mode 100644
index 0000000000..983194eea8
--- /dev/null
+++ b/drivers/ps2/ps2_busywait.c
@@ -0,0 +1,187 @@
+/*
+Copyright 2010,2011,2012,2013 Jun WAKO <wakojun@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.
+*/
+
+/*
+ * PS/2 protocol busywait version
+ */
+
+#include <stdbool.h>
+#include "wait.h"
+#include "ps2.h"
+#include "ps2_io.h"
+#include "debug.h"
+
+#define WAIT(stat, us, err) \
+ do { \
+ if (!wait_##stat(us)) { \
+ ps2_error = err; \
+ goto ERROR; \
+ } \
+ } while (0)
+
+uint8_t ps2_error = PS2_ERR_NONE;
+
+void ps2_host_init(void) {
+ clock_init();
+ data_init();
+
+ // POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20)
+ wait_ms(2500);
+
+ inhibit();
+}
+
+uint8_t ps2_host_send(uint8_t data) {
+ bool parity = true;
+ ps2_error = PS2_ERR_NONE;
+
+ /* terminate a transmission if we have */
+ inhibit();
+ wait_us(100); // 100us [4]p.13, [5]p.50
+
+ /* 'Request to Send' and Start bit */
+ data_lo();
+ clock_hi();
+ WAIT(clock_lo, 10000, 10); // 10ms [5]p.50
+
+ /* Data bit */
+ for (uint8_t i = 0; i < 8; i++) {
+ wait_us(15);
+ if (data & (1 << i)) {
+ parity = !parity;
+ data_hi();
+ } else {
+ data_lo();
+ }
+ WAIT(clock_hi, 50, 2);
+ WAIT(clock_lo, 50, 3);
+ }
+
+ /* Parity bit */
+ wait_us(15);
+ if (parity) {
+ data_hi();
+ } else {
+ data_lo();
+ }
+ WAIT(clock_hi, 50, 4);
+ WAIT(clock_lo, 50, 5);
+
+ /* Stop bit */
+ wait_us(15);
+ data_hi();
+
+ /* Ack */
+ WAIT(data_lo, 50, 6);
+ WAIT(clock_lo, 50, 7);
+
+ /* wait for idle state */
+ WAIT(clock_hi, 50, 8);
+ WAIT(data_hi, 50, 9);
+
+ inhibit();
+ return ps2_host_recv_response();
+ERROR:
+ inhibit();
+ return 0;
+}
+
+/* receive data when host want else inhibit communication */
+uint8_t ps2_host_recv_response(void) {
+ // Command may take 25ms/20ms at most([5]p.46, [3]p.21)
+ // 250 * 100us(wait for start bit in ps2_host_recv)
+ uint8_t data = 0;
+ uint8_t try
+ = 250;
+ do {
+ data = ps2_host_recv();
+ } while (try --&&ps2_error);
+ return data;
+}
+
+/* called after start bit comes */
+uint8_t ps2_host_recv(void) {
+ uint8_t data = 0;
+ bool parity = true;
+ ps2_error = PS2_ERR_NONE;
+
+ /* release lines(idle state) */
+ idle();
+
+ /* start bit [1] */
+ WAIT(clock_lo, 100, 1); // TODO: this is enough?
+ WAIT(data_lo, 1, 2);
+ WAIT(clock_hi, 50, 3);
+
+ /* data [2-9] */
+ for (uint8_t i = 0; i < 8; i++) {
+ WAIT(clock_lo, 50, 4);
+ if (data_in()) {
+ parity = !parity;
+ data |= (1 << i);
+ }
+ WAIT(clock_hi, 50, 5);
+ }
+
+ /* parity [10] */
+ WAIT(clock_lo, 50, 6);
+ if (data_in() != parity) {
+ ps2_error = PS2_ERR_PARITY;
+ goto ERROR;
+ }
+ WAIT(clock_hi, 50, 7);
+
+ /* stop bit [11] */
+ WAIT(clock_lo, 50, 8);
+ WAIT(data_hi, 1, 9);
+ WAIT(clock_hi, 50, 10);
+
+ inhibit();
+ return data;
+ERROR:
+ if (ps2_error > PS2_ERR_STARTBIT3) {
+ xprintf("x%02X\n", ps2_error);
+ }
+ inhibit();
+ return 0;
+}
+
+/* send LED state to keyboard */
+void ps2_host_set_led(uint8_t led) {
+ ps2_host_send(0xED);
+ ps2_host_send(led);
+}
diff --git a/drivers/ps2/ps2_interrupt.c b/drivers/ps2/ps2_interrupt.c
new file mode 100644
index 0000000000..70debd02f7
--- /dev/null
+++ b/drivers/ps2/ps2_interrupt.c
@@ -0,0 +1,340 @@
+/*
+Copyright 2010,2011,2012,2013 Jun WAKO <wakojun@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.
+*/
+
+/*
+ * PS/2 protocol Pin interrupt version
+ */
+
+#include <stdbool.h>
+
+#if defined(__AVR__)
+# include <avr/interrupt.h>
+#elif defined(PROTOCOL_CHIBIOS) // TODO: or STM32 ?
+// chibiOS headers
+# include "ch.h"
+# include "hal.h"
+#endif
+
+#include "ps2.h"
+#include "ps2_io.h"
+#include "print.h"
+#include "wait.h"
+
+#define WAIT(stat, us, err) \
+ do { \
+ if (!wait_##stat(us)) { \
+ ps2_error = err; \
+ goto ERROR; \
+ } \
+ } while (0)
+
+uint8_t ps2_error = PS2_ERR_NONE;
+
+static inline uint8_t pbuf_dequeue(void);
+static inline void pbuf_enqueue(uint8_t data);
+static inline bool pbuf_has_data(void);
+static inline void pbuf_clear(void);
+
+#if defined(PROTOCOL_CHIBIOS)
+void ps2_interrupt_service_routine(void);
+void palCallback(void *arg) { ps2_interrupt_service_routine(); }
+
+# define PS2_INT_INIT() \
+ { palSetLineMode(PS2_CLOCK_PIN, PAL_MODE_INPUT); } \
+ while (0)
+# define PS2_INT_ON() \
+ { \
+ palEnableLineEvent(PS2_CLOCK_PIN, PAL_EVENT_MODE_FALLING_EDGE); \
+ palSetLineCallback(PS2_CLOCK_PIN, palCallback, NULL); \
+ } \
+ while (0)
+# define PS2_INT_OFF() \
+ { palDisableLineEvent(PS2_CLOCK_PIN); } \
+ while (0)
+#endif // PROTOCOL_CHIBIOS
+
+void ps2_host_init(void) {
+ idle();
+ PS2_INT_INIT();
+ PS2_INT_ON();
+ // POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20)
+ // wait_ms(2500);
+}
+
+uint8_t ps2_host_send(uint8_t data) {
+ bool parity = true;
+ ps2_error = PS2_ERR_NONE;
+
+ PS2_INT_OFF();
+
+ /* terminate a transmission if we have */
+ inhibit();
+ wait_us(100); // 100us [4]p.13, [5]p.50
+
+ /* 'Request to Send' and Start bit */
+ data_lo();
+ clock_hi();
+ WAIT(clock_lo, 10000, 10); // 10ms [5]p.50
+
+ /* Data bit[2-9] */
+ for (uint8_t i = 0; i < 8; i++) {
+ if (data & (1 << i)) {
+ parity = !parity;
+ data_hi();
+ } else {
+ data_lo();
+ }
+ WAIT(clock_hi, 50, 2);
+ WAIT(clock_lo, 50, 3);
+ }
+
+ /* Parity bit */
+ wait_us(15);
+ if (parity) {
+ data_hi();
+ } else {
+ data_lo();
+ }
+ WAIT(clock_hi, 50, 4);
+ WAIT(clock_lo, 50, 5);
+
+ /* Stop bit */
+ wait_us(15);
+ data_hi();
+
+ /* Ack */
+ WAIT(data_lo, 50, 6);
+ WAIT(clock_lo, 50, 7);
+
+ /* wait for idle state */
+ WAIT(clock_hi, 50, 8);
+ WAIT(data_hi, 50, 9);
+
+ idle();
+ PS2_INT_ON();
+ return ps2_host_recv_response();
+ERROR:
+ idle();
+ PS2_INT_ON();
+ return 0;
+}
+
+uint8_t ps2_host_recv_response(void) {
+ // Command may take 25ms/20ms at most([5]p.46, [3]p.21)
+ uint8_t retry = 25;
+ while (retry-- && !pbuf_has_data()) {
+ wait_ms(1);
+ }
+ return pbuf_dequeue();
+}
+
+/* get data received by interrupt */
+uint8_t ps2_host_recv(void) {
+ if (pbuf_has_data()) {
+ ps2_error = PS2_ERR_NONE;
+ return pbuf_dequeue();
+ } else {
+ ps2_error = PS2_ERR_NODATA;
+ return 0;
+ }
+}
+
+void ps2_interrupt_service_routine(void) {
+ static enum {
+ INIT,
+ START,
+ BIT0,
+ BIT1,
+ BIT2,
+ BIT3,
+ BIT4,
+ BIT5,
+ BIT6,
+ BIT7,
+ PARITY,
+ STOP,
+ } state = INIT;
+ static uint8_t data = 0;
+ static uint8_t parity = 1;
+
+ // TODO: abort if elapse 100us from previous interrupt
+
+ // return unless falling edge
+ if (clock_in()) {
+ goto RETURN;
+ }
+
+ state++;
+ switch (state) {
+ case START:
+ if (data_in()) goto ERROR;
+ break;
+ case BIT0:
+ case BIT1:
+ case BIT2:
+ case BIT3:
+ case BIT4:
+ case BIT5:
+ case BIT6:
+ case BIT7:
+ data >>= 1;
+ if (data_in()) {
+ data |= 0x80;
+ parity++;
+ }
+ break;
+ case PARITY:
+ if (data_in()) {
+ if (!(parity & 0x01)) goto ERROR;
+ } else {
+ if (parity & 0x01) goto ERROR;
+ }
+ break;
+ case STOP:
+ if (!data_in()) goto ERROR;
+ pbuf_enqueue(data);
+ goto DONE;
+ break;
+ default:
+ goto ERROR;
+ }
+ goto RETURN;
+ERROR:
+ ps2_error = state;
+DONE:
+ state = INIT;
+ data = 0;
+ parity = 1;
+RETURN:
+ return;
+}
+
+#if defined(__AVR__)
+ISR(PS2_INT_VECT) { ps2_interrupt_service_routine(); }
+#endif
+
+/* send LED state to keyboard */
+void ps2_host_set_led(uint8_t led) {
+ ps2_host_send(0xED);
+ ps2_host_send(led);
+}
+
+/*--------------------------------------------------------------------
+ * Ring buffer to store scan codes from keyboard
+ *------------------------------------------------------------------*/
+#define PBUF_SIZE 32
+static uint8_t pbuf[PBUF_SIZE];
+static uint8_t pbuf_head = 0;
+static uint8_t pbuf_tail = 0;
+static inline void pbuf_enqueue(uint8_t data) {
+#if defined(__AVR__)
+ uint8_t sreg = SREG;
+ cli();
+#elif defined(PROTOCOL_CHIBIOS)
+ chSysLockFromISR();
+#endif
+
+ uint8_t next = (pbuf_head + 1) % PBUF_SIZE;
+ if (next != pbuf_tail) {
+ pbuf[pbuf_head] = data;
+ pbuf_head = next;
+ } else {
+ print("pbuf: full\n");
+ }
+
+#if defined(__AVR__)
+ SREG = sreg;
+#elif defined(PROTOCOL_CHIBIOS)
+ chSysUnlockFromISR();
+#endif
+}
+static inline uint8_t pbuf_dequeue(void) {
+ uint8_t val = 0;
+
+#if defined(__AVR__)
+ uint8_t sreg = SREG;
+ cli();
+#elif defined(PROTOCOL_CHIBIOS)
+ chSysLock();
+#endif
+
+ if (pbuf_head != pbuf_tail) {
+ val = pbuf[pbuf_tail];
+ pbuf_tail = (pbuf_tail + 1) % PBUF_SIZE;
+ }
+
+#if defined(__AVR__)
+ SREG = sreg;
+#elif defined(PROTOCOL_CHIBIOS)
+ chSysUnlock();
+#endif
+
+ return val;
+}
+static inline bool pbuf_has_data(void) {
+#if defined(__AVR__)
+ uint8_t sreg = SREG;
+ cli();
+#elif defined(PROTOCOL_CHIBIOS)
+ chSysLock();
+#endif
+
+ bool has_data = (pbuf_head != pbuf_tail);
+
+#if defined(__AVR__)
+ SREG = sreg;
+#elif defined(PROTOCOL_CHIBIOS)
+ chSysUnlock();
+#endif
+ return has_data;
+}
+static inline void pbuf_clear(void) {
+#if defined(__AVR__)
+ uint8_t sreg = SREG;
+ cli();
+#elif defined(PROTOCOL_CHIBIOS)
+ chSysLock();
+#endif
+
+ pbuf_head = pbuf_tail = 0;
+
+#if defined(__AVR__)
+ SREG = sreg;
+#elif defined(PROTOCOL_CHIBIOS)
+ chSysUnlock();
+#endif
+}
diff --git a/drivers/ps2/ps2_io.h b/drivers/ps2/ps2_io.h
new file mode 100644
index 0000000000..de93cb7a39
--- /dev/null
+++ b/drivers/ps2/ps2_io.h
@@ -0,0 +1,11 @@
+#pragma once
+
+void clock_init(void);
+void clock_lo(void);
+void clock_hi(void);
+bool clock_in(void);
+
+void data_init(void);
+void data_lo(void);
+void data_hi(void);
+bool data_in(void);
diff --git a/drivers/ps2/ps2_mouse.c b/drivers/ps2/ps2_mouse.c
new file mode 100644
index 0000000000..8a6668b410
--- /dev/null
+++ b/drivers/ps2/ps2_mouse.c
@@ -0,0 +1,270 @@
+/*
+Copyright 2011,2013 Jun Wako <wakojun@gmail.com>
+
+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 2 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 <stdbool.h>
+#include "ps2_mouse.h"
+#include "wait.h"
+#include "gpio.h"
+#include "host.h"
+#include "timer.h"
+#include "print.h"
+#include "report.h"
+#include "debug.h"
+#include "ps2.h"
+
+/* ============================= MACROS ============================ */
+
+static report_mouse_t mouse_report = {};
+
+static inline void ps2_mouse_print_report(report_mouse_t *mouse_report);
+static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report);
+static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report);
+static inline void ps2_mouse_enable_scrolling(void);
+static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report);
+
+/* ============================= IMPLEMENTATION ============================ */
+
+/* supports only 3 button mouse at this time */
+void ps2_mouse_init(void) {
+ ps2_host_init();
+
+ wait_ms(PS2_MOUSE_INIT_DELAY); // wait for powering up
+
+ PS2_MOUSE_SEND(PS2_MOUSE_RESET, "ps2_mouse_init: sending reset");
+
+ PS2_MOUSE_RECEIVE("ps2_mouse_init: read BAT");
+ PS2_MOUSE_RECEIVE("ps2_mouse_init: read DevID");
+
+#ifdef PS2_MOUSE_USE_REMOTE_MODE
+ ps2_mouse_set_remote_mode();
+#else
+ ps2_mouse_enable_data_reporting();
+#endif
+
+#ifdef PS2_MOUSE_ENABLE_SCROLLING
+ ps2_mouse_enable_scrolling();
+#endif
+
+#ifdef PS2_MOUSE_USE_2_1_SCALING
+ ps2_mouse_set_scaling_2_1();
+#endif
+
+ ps2_mouse_init_user();
+}
+
+__attribute__((weak)) void ps2_mouse_init_user(void) {}
+
+__attribute__((weak)) void ps2_mouse_moved_user(report_mouse_t *mouse_report) {}
+
+void ps2_mouse_task(void) {
+ static uint8_t buttons_prev = 0;
+ extern int tp_buttons;
+
+ /* receives packet from mouse */
+ uint8_t rcv;
+ rcv = ps2_host_send(PS2_MOUSE_READ_DATA);
+ if (rcv == PS2_ACK) {
+ mouse_report.buttons = ps2_host_recv_response() | tp_buttons;
+ mouse_report.x = ps2_host_recv_response() * PS2_MOUSE_X_MULTIPLIER;
+ mouse_report.y = ps2_host_recv_response() * PS2_MOUSE_Y_MULTIPLIER;
+#ifdef PS2_MOUSE_ENABLE_SCROLLING
+ mouse_report.v = -(ps2_host_recv_response() & PS2_MOUSE_SCROLL_MASK) * PS2_MOUSE_V_MULTIPLIER;
+#endif
+ } else {
+ if (debug_mouse) print("ps2_mouse: fail to get mouse packet\n");
+ return;
+ }
+
+ /* if mouse moves or buttons state changes */
+ if (mouse_report.x || mouse_report.y || mouse_report.v || ((mouse_report.buttons ^ buttons_prev) & PS2_MOUSE_BTN_MASK)) {
+#ifdef PS2_MOUSE_DEBUG_RAW
+ // Used to debug raw ps2 bytes from mouse
+ ps2_mouse_print_report(&mouse_report);
+#endif
+ buttons_prev = mouse_report.buttons;
+ ps2_mouse_convert_report_to_hid(&mouse_report);
+#if PS2_MOUSE_SCROLL_BTN_MASK
+ ps2_mouse_scroll_button_task(&mouse_report);
+#endif
+ if (mouse_report.x || mouse_report.y || mouse_report.v) {
+ ps2_mouse_moved_user(&mouse_report);
+ }
+#ifdef PS2_MOUSE_DEBUG_HID
+ // Used to debug the bytes sent to the host
+ ps2_mouse_print_report(&mouse_report);
+#endif
+ host_mouse_send(&mouse_report);
+ }
+
+ ps2_mouse_clear_report(&mouse_report);
+}
+
+void ps2_mouse_disable_data_reporting(void) { PS2_MOUSE_SEND(PS2_MOUSE_DISABLE_DATA_REPORTING, "ps2 mouse disable data reporting"); }
+
+void ps2_mouse_enable_data_reporting(void) { PS2_MOUSE_SEND(PS2_MOUSE_ENABLE_DATA_REPORTING, "ps2 mouse enable data reporting"); }
+
+void ps2_mouse_set_remote_mode(void) {
+ PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_REMOTE_MODE, "ps2 mouse set remote mode");
+ ps2_mouse_mode = PS2_MOUSE_REMOTE_MODE;
+}
+
+void ps2_mouse_set_stream_mode(void) {
+ PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_STREAM_MODE, "ps2 mouse set stream mode");
+ ps2_mouse_mode = PS2_MOUSE_STREAM_MODE;
+}
+
+void ps2_mouse_set_scaling_2_1(void) { PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_2_1, "ps2 mouse set scaling 2:1"); }
+
+void ps2_mouse_set_scaling_1_1(void) { PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_1_1, "ps2 mouse set scaling 1:1"); }
+
+void ps2_mouse_set_resolution(ps2_mouse_resolution_t resolution) { PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_RESOLUTION, resolution, "ps2 mouse set resolution"); }
+
+void ps2_mouse_set_sample_rate(ps2_mouse_sample_rate_t sample_rate) { PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_SAMPLE_RATE, sample_rate, "ps2 mouse set sample rate"); }
+
+/* ============================= HELPERS ============================ */
+
+#define X_IS_NEG (mouse_report->buttons & (1 << PS2_MOUSE_X_SIGN))
+#define Y_IS_NEG (mouse_report->buttons & (1 << PS2_MOUSE_Y_SIGN))
+#define X_IS_OVF (mouse_report->buttons & (1 << PS2_MOUSE_X_OVFLW))
+#define Y_IS_OVF (mouse_report->buttons & (1 << PS2_MOUSE_Y_OVFLW))
+static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report) {
+ // PS/2 mouse data is '9-bit integer'(-256 to 255) which is comprised of sign-bit and 8-bit value.
+ // bit: 8 7 ... 0
+ // sign \8-bit/
+ //
+ // Meanwhile USB HID mouse indicates 8bit data(-127 to 127), note that -128 is not used.
+ //
+ // This converts PS/2 data into HID value. Use only -127-127 out of PS/2 9-bit.
+ mouse_report->x = X_IS_NEG ? ((!X_IS_OVF && -127 <= mouse_report->x && mouse_report->x <= -1) ? mouse_report->x : -127) : ((!X_IS_OVF && 0 <= mouse_report->x && mouse_report->x <= 127) ? mouse_report->x : 127);
+ mouse_report->y = Y_IS_NEG ? ((!Y_IS_OVF && -127 <= mouse_report->y && mouse_report->y <= -1) ? mouse_report->y : -127) : ((!Y_IS_OVF && 0 <= mouse_report->y && mouse_report->y <= 127) ? mouse_report->y : 127);
+
+#ifdef PS2_MOUSE_INVERT_BUTTONS
+ // swap left & right buttons
+ uint8_t needs_left = mouse_report->buttons & PS2_MOUSE_BTN_RIGHT;
+ uint8_t needs_right = mouse_report->buttons & PS2_MOUSE_BTN_LEFT;
+ mouse_report->buttons = (mouse_report->buttons & ~(PS2_MOUSE_BTN_MASK)) | (needs_left ? PS2_MOUSE_BTN_LEFT : 0) | (needs_right ? PS2_MOUSE_BTN_RIGHT : 0);
+#else
+ // remove sign and overflow flags
+ mouse_report->buttons &= PS2_MOUSE_BTN_MASK;
+#endif
+
+#ifdef PS2_MOUSE_INVERT_X
+ mouse_report->x = -mouse_report->x;
+#endif
+#ifndef PS2_MOUSE_INVERT_Y // NOTE if not!
+ // invert coordinate of y to conform to USB HID mouse
+ mouse_report->y = -mouse_report->y;
+#endif
+
+#ifdef PS2_MOUSE_ROTATE
+ int8_t x = mouse_report->x;
+ int8_t y = mouse_report->y;
+# if PS2_MOUSE_ROTATE == 90
+ mouse_report->x = y;
+ mouse_report->y = -x;
+# elif PS2_MOUSE_ROTATE == 180
+ mouse_report->x = -x;
+ mouse_report->y = -y;
+# elif PS2_MOUSE_ROTATE == 270
+ mouse_report->x = -y;
+ mouse_report->y = x;
+# endif
+#endif
+}
+
+static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report) {
+ mouse_report->x = 0;
+ mouse_report->y = 0;
+ mouse_report->v = 0;
+ mouse_report->h = 0;
+ mouse_report->buttons = 0;
+}
+
+static inline void ps2_mouse_print_report(report_mouse_t *mouse_report) {
+ if (!debug_mouse) return;
+ print("ps2_mouse: [");
+ print_hex8(mouse_report->buttons);
+ print("|");
+ print_hex8((uint8_t)mouse_report->x);
+ print(" ");
+ print_hex8((uint8_t)mouse_report->y);
+ print(" ");
+ print_hex8((uint8_t)mouse_report->v);
+ print(" ");
+ print_hex8((uint8_t)mouse_report->h);
+ print("]\n");
+}
+
+static inline void ps2_mouse_enable_scrolling(void) {
+ PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Initiaing scroll wheel enable: Set sample rate");
+ PS2_MOUSE_SEND(200, "200");
+ PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
+ PS2_MOUSE_SEND(100, "100");
+ PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
+ PS2_MOUSE_SEND(80, "80");
+ PS2_MOUSE_SEND(PS2_MOUSE_GET_DEVICE_ID, "Finished enabling scroll wheel");
+ wait_ms(20);
+}
+
+#define PRESS_SCROLL_BUTTONS mouse_report->buttons |= (PS2_MOUSE_SCROLL_BTN_MASK)
+#define RELEASE_SCROLL_BUTTONS mouse_report->buttons &= ~(PS2_MOUSE_SCROLL_BTN_MASK)
+static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report) {
+ static enum {
+ SCROLL_NONE,
+ SCROLL_BTN,
+ SCROLL_SENT,
+ } scroll_state = SCROLL_NONE;
+ static uint16_t scroll_button_time = 0;
+
+ if (PS2_MOUSE_SCROLL_BTN_MASK == (mouse_report->buttons & (PS2_MOUSE_SCROLL_BTN_MASK))) {
+ // All scroll buttons are pressed
+
+ if (scroll_state == SCROLL_NONE) {
+ scroll_button_time = timer_read();
+ scroll_state = SCROLL_BTN;
+ }
+
+ // If the mouse has moved, update the report to scroll instead of move the mouse
+ if (mouse_report->x || mouse_report->y) {
+ scroll_state = SCROLL_SENT;
+ mouse_report->v = -mouse_report->y / (PS2_MOUSE_SCROLL_DIVISOR_V);
+ mouse_report->h = mouse_report->x / (PS2_MOUSE_SCROLL_DIVISOR_H);
+ mouse_report->x = 0;
+ mouse_report->y = 0;
+#ifdef PS2_MOUSE_INVERT_H
+ mouse_report->h = -mouse_report->h;
+#endif
+#ifdef PS2_MOUSE_INVERT_V
+ mouse_report->v = -mouse_report->v;
+#endif
+ }
+ } else if (0 == (PS2_MOUSE_SCROLL_BTN_MASK & mouse_report->buttons)) {
+ // None of the scroll buttons are pressed
+
+#if PS2_MOUSE_SCROLL_BTN_SEND
+ if (scroll_state == SCROLL_BTN && timer_elapsed(scroll_button_time) < PS2_MOUSE_SCROLL_BTN_SEND) {
+ PRESS_SCROLL_BUTTONS;
+ host_mouse_send(mouse_report);
+ wait_ms(100);
+ RELEASE_SCROLL_BUTTONS;
+ }
+#endif
+ scroll_state = SCROLL_NONE;
+ }
+
+ RELEASE_SCROLL_BUTTONS;
+}
diff --git a/drivers/ps2/ps2_mouse.h b/drivers/ps2/ps2_mouse.h
new file mode 100644
index 0000000000..c97c6c893a
--- /dev/null
+++ b/drivers/ps2/ps2_mouse.h
@@ -0,0 +1,177 @@
+/*
+Copyright 2011 Jun Wako <wakojun@gmail.com>
+
+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 2 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/>.
+*/
+
+#pragma once
+
+#include <stdbool.h>
+#include "debug.h"
+#include "report.h"
+
+#define PS2_MOUSE_SEND(command, message) \
+ do { \
+ __attribute__((unused)) uint8_t rcv = ps2_host_send(command); \
+ if (debug_mouse) { \
+ print((message)); \
+ xprintf(" command: %X, result: %X, error: %X \n", command, rcv, ps2_error); \
+ } \
+ } while (0)
+
+#define PS2_MOUSE_SEND_SAFE(command, message) \
+ do { \
+ if (PS2_MOUSE_STREAM_MODE == ps2_mouse_mode) { \
+ ps2_mouse_disable_data_reporting(); \
+ } \
+ PS2_MOUSE_SEND(command, message); \
+ if (PS2_MOUSE_STREAM_MODE == ps2_mouse_mode) { \
+ ps2_mouse_enable_data_reporting(); \
+ } \
+ } while (0)
+
+#define PS2_MOUSE_SET_SAFE(command, value, message) \
+ do { \
+ if (PS2_MOUSE_STREAM_MODE == ps2_mouse_mode) { \
+ ps2_mouse_disable_data_reporting(); \
+ } \
+ PS2_MOUSE_SEND(command, message); \
+ PS2_MOUSE_SEND(value, "Sending value"); \
+ if (PS2_MOUSE_STREAM_MODE == ps2_mouse_mode) { \
+ ps2_mouse_enable_data_reporting(); \
+ } \
+ } while (0)
+
+#define PS2_MOUSE_RECEIVE(message) \
+ do { \
+ __attribute__((unused)) uint8_t rcv = ps2_host_recv_response(); \
+ if (debug_mouse) { \
+ print((message)); \
+ xprintf(" result: %X, error: %X \n", rcv, ps2_error); \
+ } \
+ } while (0)
+
+__attribute__((unused)) static enum ps2_mouse_mode_e {
+ PS2_MOUSE_STREAM_MODE,
+ PS2_MOUSE_REMOTE_MODE,
+} ps2_mouse_mode = PS2_MOUSE_STREAM_MODE;
+
+/*
+ * Data format:
+ * byte|7 6 5 4 3 2 1 0
+ * ----+----------------------------------------------------------------
+ * 0|[Yovflw][Xovflw][Ysign ][Xsign ][ 1 ][Middle][Right ][Left ]
+ * 1|[ X movement(0-255) ]
+ * 2|[ Y movement(0-255) ]
+ */
+#define PS2_MOUSE_BTN_MASK 0x07
+#define PS2_MOUSE_BTN_LEFT 0
+#define PS2_