Add kbled control

src/board/system76/lemp9/acpi.c

@@ -1,7 +1,7 @@
 #include <board/acpi.h>
 #include <board/battery.h>
-#include <board/dac.h>
 #include <board/gpio.h>
+#include <board/kbled.h>
 #include <board/peci.h>
 #include <common/debug.h>
 
@@ -9,9 +9,9 @@ extern bool lid_wake;
 
 extern uint8_t sci_extra;
 
-uint8_t fcmd = 0;
-uint8_t fdat = 0;
-uint8_t fbuf[4] = { 0, 0, 0, 0 };
+static uint8_t fcmd = 0;
+static uint8_t fdat = 0;
+static uint8_t fbuf[4] = { 0, 0, 0, 0 };
 
 void fcommand(void) {
     switch (fcmd) {
@@ -20,11 +20,11 @@ void fcommand(void) {
             switch (fdat) {
                 // Set white LED brightness
                 case 0x00:
-                    DACDAT2 = fbuf[0];
+                    kbled_set(fbuf[0]);
                     break;
                 // Get white LED brightness
                 case 0x01:
-                    fbuf[0] = DACDAT2;
+                    fbuf[0] = kbled_get();
                     break;
             }
             break;

src/board/system76/lemp9/include/board/kbled.h

@@ -0,0 +1,9 @@
+#ifndef _BOARD_KBLED_H
+#define _BOARD_KBLED_H
+
+#include <stdint.h>
+
+uint8_t kbled_get(void);
+void kbled_set(uint8_t level);
+
+#endif // _BOARD_KBLED_H

src/board/system76/lemp9/kbled.c

@@ -0,0 +1,31 @@
+#include <board/dac.h>
+#include <board/kbled.h>
+#include <common/macro.h>
+
+static uint8_t __code levels[] = {
+    0,
+    48,
+    72,
+    96,
+    192,
+    255
+};
+
+uint8_t kbled_get(void) {
+    uint8_t level;
+    uint8_t raw = DACDAT2;
+    for (level = 0; level < ARRAY_SIZE(levels); level++) {
+        if (raw <= levels[level]) {
+            return level;
+        }
+    }
+    return 0;
+}
+
+void kbled_set(uint8_t level) {
+    if (level < ARRAY_SIZE(levels)) {
+        DACDAT2 = levels[level];
+    } else {
+        DACDAT2 = 0;
+    }
+}

src/board/system76/lemp9/kbscan.c

@@ -3,6 +3,7 @@
 #include <arch/delay.h>
 #include <board/gpio.h>
 #include <board/kbc.h>
+#include <board/kbled.h>
 #include <board/kbscan.h>
 #include <board/keymap.h>
 #include <board/pmc.h>
@@ -104,6 +105,14 @@ void kbscan_event(void) {
                             if (new_b) {
                                 uint8_t sci = SCI_EXTRA;
                                 sci_extra = (uint8_t)(key & 0xFF);
+                                
+                                // HACK FOR HARDWARE HOTKEYS
+                                switch (sci_extra) {
+                                    case SCI_EXTRA_KBD_BKL:
+                                        kbled_set(kbled_get() + 1);
+                                        break;
+                                }
+
                                 if (!pmc_sci(&PMC_1, sci)) {
                                     // In the case of ignored SCI, reset bit
                                     new &= ~(1 << j);