System76 common board directory (#53)

* Move configuration for battery into board.mk

* lemp9: remove tcpm code

* Move touchpad to its own module

* Add kbled_reset to all platforms, move items to run on CPU reset to a function

* Add defines for battery and charger address

* Add I2C_0 export to it5570e

* Move common system76 board functions into src/board/system76/common

src/board/system76/common/main.c

@@ -0,0 +1,146 @@
+#include <8051.h>
+#include <stdio.h>
+
+#include <arch/arch.h>
+#include <arch/delay.h>
+#include <arch/time.h>
+#include <board/battery.h>
+#include <board/board.h>
+#include <board/ecpm.h>
+#include <board/gpio.h>
+#include <board/gctrl.h>
+#include <board/kbc.h>
+#include <board/kbled.h>
+#include <board/kbscan.h>
+#include <board/lid.h>
+#include <board/peci.h>
+#include <board/pmc.h>
+#include <board/power.h>
+#include <board/ps2.h>
+#include <board/pwm.h>
+#include <board/smbus.h>
+#include <board/smfi.h>
+#include <board/touchpad.h>
+#include <common/debug.h>
+#include <common/macro.h>
+#include <common/version.h>
+
+#ifdef PARPORT_DEBUG
+    #include <ec/parallel.h>
+#endif
+
+void external_0(void) __interrupt(0) {}
+// timer_0 is in time.c
+void timer_0(void) __interrupt(1);
+void external_1(void) __interrupt(2) {}
+void timer_1(void) __interrupt(3) {}
+void serial(void) __interrupt(4) {}
+void timer_2(void) __interrupt(5) {}
+
+uint8_t main_cycle = 0;
+
+void init(void) {
+    // Must happen first
+    arch_init();
+    board_init();
+    gctrl_init();
+    gpio_init();
+
+    // Can happen in any order
+    ecpm_init();
+    kbc_init();
+    kbled_init();
+#ifdef PARPORT_DEBUG
+    parport_init();
+#else
+    kbscan_init();
+#endif
+    peci_init();
+    pmc_init();
+    pwm_init();
+    smbus_init();
+    smfi_init();
+
+    //TODO: INTC
+}
+
+void main(void) {
+    init();
+
+    INFO("\n");
+
+#if GPIO_DEBUG
+    gpio_debug();
+#endif
+
+    // Allow CPU to boot
+    gpio_set(&SB_KBCRST_N, true);
+    // Allow backlight to be turned on
+    gpio_set(&BKL_EN, true);
+    // Enable camera
+    gpio_set(&CCD_EN, true);
+    // Enable wireless
+    gpio_set(&BT_EN, true);
+    gpio_set(&WLAN_EN, true);
+    gpio_set(&WLAN_PWR_EN, true);
+    // Enable right USB port
+    gpio_set(&USB_PWR_EN_N, false);
+    // Assert SMI#, SCI#, and SWI#
+    gpio_set(&SCI_N, true);
+    gpio_set(&SMI_N, true);
+    gpio_set(&SWI_N, true);
+
+    INFO("System76 EC board '%s', version '%s'\n", board(), version());
+
+    uint32_t last_time = 0;
+    for(main_cycle = 0; ; main_cycle++) {
+        switch (main_cycle % 5) {
+            case 0:
+                // Handle power states
+                power_event();
+                break;
+            case 1:
+#ifndef PARPORT_DEBUG
+                // Scans keyboard and sends keyboard packets
+                kbscan_event();
+#endif
+                break;
+            case 2:
+                // Passes through touchpad packets
+                touchpad_event();
+                break;
+            case 3:
+                // Checks for keyboard/mouse packets from host
+                kbc_event(&KBC);
+                break;
+            case 4:
+                // Handle lid close/open
+                lid_event();
+                break;
+        }
+
+        if (main_cycle == 0) {
+            uint32_t time = time_get();
+            // Only run the following once a second
+            if (last_time > time || (time - last_time) >= 1000) {
+                last_time = time;
+
+                // Updates fan status and temps
+                peci_event();
+
+                // Updates battery status
+                battery_event();
+            }
+        }
+
+        // Board-specific events
+        board_event();
+
+        // Handles ACPI communication
+        pmc_event(&PMC_1);
+        // AP/EC communication over SMFI
+        smfi_event();
+        // Idle until next timer interrupt
+        //Disabled until interrupts used: PCON |= 1;
+    }
+}