Decompile errorled.c, GPIO register defines

decompals · Apr 28, 2024 · 3f24e70 · 3f24e70
1 parent ade805e
commit 3f24e70
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Showing 6 changed files with 80 additions and 38 deletions.
diff --git a/include/PR/bcp.h b/include/PR/bcp.h
@@ -70,10 +70,40 @@
 //! ?
 #define PI_5C_REG (PI_BASE_REG + 0x5C)
 
-
-
-//! PI_MISC_REG ?
-#define PI_60_REG (PI_BASE_REG + 0x60)
+/**
+ * [31:16] Box ID
+ *   [31:30] ?? (osInitialize checks this and sets __osBbIsBb to 2 if != 0)
+ *   [29:27] ?? (unused so far)
+ *   [26:25] ?? (system clock speed identifier?)
+ *   [24:22] ?? (bootrom, checked against MI_10_REG and copied there if mismatch)
+ * [ 7: 6] RTC mask
+ *     [5] Error LED mask
+ *     [4] Power Control mask
+ * [ 3: 2] RTC control
+ *     [1] Error LED (1=on, 0=off)
+ *     [0] Power Control (1=on, 0=off)
+ */
+#define PI_GPIO_REG (PI_BASE_REG + 0x60)
+
+#define PI_GPIO_GET_BOXID(reg)  ((reg) >> 16)
+#define PI_GPIO_GET_PWR(reg)    (((reg) >> 0) & 1)
+#define PI_GPIO_GET_LED(reg)    (((reg) >> 1) & 1)
+
+/* Box ID masks */
+#define PI_GPIO_BOXID_MASK_30_31 (3 << 30)
+
+/* Enable masks */
+#define PI_GPIO_MASK_PWR    (1 << 4)
+#define PI_GPIO_MASK_LED    (2 << 4)
+#define PI_GPIO_MASK_RTC_0  (4 << 4)
+#define PI_GPIO_MASK_RTC_1  (8 << 4)
+/* RTC (TODO) */
+/* LED */
+#define PI_GPIO_LED_ON      (1 << 1)
+#define PI_GPIO_LED_OFF     (0 << 1)
+/* Power */
+#define PI_GPIO_PWR_ON      (1 << 0)
+#define PI_GPIO_PWR_OFF     (0 << 0)
 
 
 

diff --git a/src/bb/misc/boxid.c b/src/bb/misc/boxid.c
@@ -2,5 +2,5 @@
 #include "PR/bcp.h"
 
 u32 osBbGetBoxId(void) {
-    return IO_READ(PI_60_REG) >> 0x10;
+    return PI_GPIO_GET_BOXID(IO_READ(PI_GPIO_REG));
 }
diff --git a/src/bb/misc/errorled.c b/src/bb/misc/errorled.c
@@ -0,0 +1,14 @@
+#include "PR/os_internal.h"
+#include "PR/bcp.h"
+
+void osBbSetErrorLed(u32 value) {
+    u32 mask = IO_READ(PI_GPIO_REG);
+    mask &= ~PI_GPIO_LED_ON;
+    mask &= ~PI_GPIO_MASK_LED;
+    IO_WRITE(PI_GPIO_REG, mask | ((value == 0) ? PI_GPIO_LED_ON : PI_GPIO_LED_OFF) | PI_GPIO_MASK_LED);
+}
+
+u32 osBbGetErrorLed(void) {
+    u32 v = PI_GPIO_GET_LED(IO_READ(PI_GPIO_REG));
+    return v;
+}
diff --git a/src/bb/misc/power.c b/src/bb/misc/power.c
@@ -2,11 +2,9 @@
 #include "PR/bcp.h"
 
 void osBbPowerOn(void) {
-    // Power control = 1, Power mask = 1
-    IO_WRITE(PI_60_REG, 0x11);
+    IO_WRITE(PI_GPIO_REG, PI_GPIO_MASK_PWR | PI_GPIO_PWR_ON);
 }
 
 void osBbPowerOff(void) {
-    // Power control = 0, Power mask = 1
-    IO_WRITE(PI_60_REG, 0x10);
+    IO_WRITE(PI_GPIO_REG, PI_GPIO_MASK_PWR | PI_GPIO_PWR_OFF);
 }
diff --git a/src/bb/misc/rtc.c b/src/bb/misc/rtc.c
@@ -5,29 +5,29 @@
 void __osBbDelay(u32 usec);
 
 static void write_rtc(u32 x) {
-    IO_WRITE(PI_60_REG, x);
+    IO_WRITE(PI_GPIO_REG, x);
     __osBbDelay(2);
 }
 
 static void send_start(u8 write) {
     u32 i;
     u32 j;
-    u32 mask = IO_READ(PI_60_REG) & ~0xCC;
+    u32 mask = IO_READ(PI_GPIO_REG) & ~(PI_GPIO_MASK_RTC_0 | PI_GPIO_MASK_RTC_1 | 0xC);
     u8 byte[2];
 
     byte[0] = (!write) ? 0xD1 : 0xD0;
     byte[1] = 0;
 
-    write_rtc(mask | 0xC4);
-    write_rtc(mask | 0xC0);
+    write_rtc(mask | (PI_GPIO_MASK_RTC_1 | 0) | (PI_GPIO_MASK_RTC_0 | 4));
+    write_rtc(mask | (PI_GPIO_MASK_RTC_1 | 0) | (PI_GPIO_MASK_RTC_0 | 0));
 
     for (i = 0; i < write + 1; i++) {
         for (j = 0; j < 8; j++) {
-            u32 b = ((byte[i] >> (7 - j)) & 1) ? 8 : 0;
+            u32 b = ((byte[i] >> (7 - j)) & 1) ? (2 << 2) : (0 << 2);
 
-            write_rtc(mask | (0x80 | b) | 0x40);
-            write_rtc(mask | (0x80 | b) | 0x44);
-            write_rtc(mask | (0x80 | b) | 0x40);
+            write_rtc(mask | (PI_GPIO_MASK_RTC_1 | b) | (PI_GPIO_MASK_RTC_0 | 0));
+            write_rtc(mask | (PI_GPIO_MASK_RTC_1 | b) | (PI_GPIO_MASK_RTC_0 | 4));
+            write_rtc(mask | (PI_GPIO_MASK_RTC_1 | b) | (PI_GPIO_MASK_RTC_0 | 0));
         }
         write_rtc(mask | 0x40);
         write_rtc(mask | 0x44);
@@ -36,61 +36,61 @@ static void send_start(u8 write) {
 }
 
 static void send_stop(void) {
-    u32 mask = IO_READ(PI_60_REG) & ~0xCC;
-    write_rtc(mask | 0x80 | 0x40);
-    write_rtc(mask | 0x80 | 0x44);
-    write_rtc(mask | 0x80 | 0x4C);
+    u32 mask = IO_READ(PI_GPIO_REG) & ~(PI_GPIO_MASK_RTC_1 | PI_GPIO_MASK_RTC_0 | 0xC);
+    write_rtc(mask | (PI_GPIO_MASK_RTC_1 | 0) | (PI_GPIO_MASK_RTC_0 | 0x0));
+    write_rtc(mask | (PI_GPIO_MASK_RTC_1 | 0) | (PI_GPIO_MASK_RTC_0 | 0x4));
+    write_rtc(mask | (PI_GPIO_MASK_RTC_1 | 0) | (PI_GPIO_MASK_RTC_0 | 0xC));
 }
 
 static void read_bytes(u8* bytes, u8 len) {
     u32 ack;
     u32 i;
-    u32 mask = IO_READ(PI_60_REG) & ~0xCC;
+    u32 mask = IO_READ(PI_GPIO_REG) & ~(PI_GPIO_MASK_RTC_0 | PI_GPIO_MASK_RTC_1 | 0xC);
 
     while (len-- > 0) {
         u32 x = 0;
 
         for (i = 0; i < 8; i++) {
-            write_rtc(mask | 0x40);
-            write_rtc(mask | 0x44);
+            write_rtc(mask | (PI_GPIO_MASK_RTC_0 | 0));
+            write_rtc(mask | (PI_GPIO_MASK_RTC_0 | 4));
             x <<= 1;
-            x |= (IO_READ(PI_60_REG) >> 3) & 1;
+            x |= (IO_READ(PI_GPIO_REG) >> 3) & 1;
         }
         *(bytes++) = x;
 
-        ack = (len == 0) ? 0x88 : 0x80;
+        ack = (len == 0) ? (PI_GPIO_MASK_RTC_1 | 8) : (PI_GPIO_MASK_RTC_1 | 0);
 
-        write_rtc(mask | 0x40 | 0x80);
-        write_rtc(mask | 0x44 | ack);
+        write_rtc(mask | (PI_GPIO_MASK_RTC_1 | 0) | (PI_GPIO_MASK_RTC_0 | 0));
+        write_rtc(mask | (PI_GPIO_MASK_RTC_0 | 4) | ack);
     }
     send_stop();
 }
 
 static void write_bytes(u8* bytes, u8 len) {
     u32 i;
-    u32 mask = IO_READ(PI_60_REG) & ~0xCC;
+    u32 mask = IO_READ(PI_GPIO_REG) & ~(PI_GPIO_MASK_RTC_0 | PI_GPIO_MASK_RTC_1 | 0xC);
 
     while (len-- > 0) {
         u32 x = *(bytes++);
 
         for (i = 0; i < 8; i++) {
             u32 b = (x & 0x80) ? 8 : 0;
 
-            write_rtc(mask | (0x80 | b) | 0x40);
-            write_rtc(mask | (0x80 | b) | 0x44);
-            write_rtc(mask | (0x80 | b) | 0x44);
+            write_rtc(mask | (PI_GPIO_MASK_RTC_1 | b) | (PI_GPIO_MASK_RTC_0 | 0));
+            write_rtc(mask | (PI_GPIO_MASK_RTC_1 | b) | (PI_GPIO_MASK_RTC_0 | 4));
+            write_rtc(mask | (PI_GPIO_MASK_RTC_1 | b) | (PI_GPIO_MASK_RTC_0 | 4));
             x <<= 1;
         }
-        write_rtc(mask | 0x40);
-        write_rtc(mask | 0x44);
-        IO_READ(PI_60_REG);
-        write_rtc(mask | 0x40);
+        write_rtc(mask | (PI_GPIO_MASK_RTC_0 | 0));
+        write_rtc(mask | (PI_GPIO_MASK_RTC_0 | 4));
+        IO_READ(PI_GPIO_REG);
+        write_rtc(mask | (PI_GPIO_MASK_RTC_0 | 0));
     }
     send_stop();
 }
 
 void osBbRtcInit(void) {
-    write_rtc(IO_READ(PI_60_REG) | 0xCC);
+    write_rtc(IO_READ(PI_GPIO_REG) | PI_GPIO_MASK_RTC_0 | PI_GPIO_MASK_RTC_1 | 0xC);
 }
 
 void osBbRtcSet(u8 year, u8 month, u8 day, u8 dow, u8 hour, u8 min, u8 sec) {

diff --git a/src/os/initialize.c b/src/os/initialize.c
@@ -106,7 +106,7 @@ void INITIALIZE_FUNC() {
     }
 
     if (__osBbIsBb) {
-        if (IO_READ(PI_60_REG) & 0xC0000000) {
+        if (IO_READ(PI_GPIO_REG) & PI_GPIO_BOXID_MASK_30_31) {
             __osBbIsBb = 2;
         }
     }