Add support for RP2350

Author: retsifp

cores/rp2040/RP2040Support.h

@@ -22,7 +22,11 @@
 #include <hardware/irq.h>
 #include <hardware/pio.h>
 #include <pico/unique_id.h>
+#ifdef PICO_RP2350
+#include <hardware/regs/powman.h>
+#else
 #include <hardware/regs/vreg_and_chip_reset.h>
+#endif
 #include <hardware/exception.h>
 #include <hardware/watchdog.h>
 #include <hardware/structs/rosc.h>
@@ -353,27 +357,58 @@ class RP2040 {
         watchdog_update();
     }
 
-    enum resetReason_t {UNKNOWN_RESET, PWRON_RESET, RUN_PIN_RESET, SOFT_RESET, WDT_RESET, DEBUG_RESET};
+    enum resetReason_t {UNKNOWN_RESET, PWRON_RESET, RUN_PIN_RESET, SOFT_RESET, WDT_RESET, DEBUG_RESET, GLITCH_RESET, BROWNOUT_RESET};
 
     resetReason_t getResetReason(void) {
         io_rw_32 *WD_reason_reg = (io_rw_32 *)(WATCHDOG_BASE + WATCHDOG_REASON_OFFSET);
-        io_rw_32 *rrp = (io_rw_32 *)(VREG_AND_CHIP_RESET_BASE + VREG_AND_CHIP_RESET_CHIP_RESET_OFFSET);
 
-        if (watchdog_caused_reboot() && watchdog_enable_caused_reboot()) // watchdog timer
+        if (watchdog_caused_reboot() && watchdog_enable_caused_reboot()) { // watchdog timer
             return WDT_RESET;
+        }
 
-        if (*WD_reason_reg & WATCHDOG_REASON_TIMER_BITS) // soft reset() or reboot()
+        if (*WD_reason_reg & WATCHDOG_REASON_TIMER_BITS) { // soft reset() or reboot()
             return SOFT_RESET;
+        }
+
+#ifdef PICO_RP2350
+        // **** RP2350 is untested ****
+        io_rw_32 *rrp = (io_rw_32 *)(POWMAN_BASE + POWMAN_CHIP_RESET_OFFSET);
 
-        if (*rrp & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_POR_BITS) // POR: power-on reset or brown-out detection
+        if (*rrp & POWMAN_CHIP_RESET_HAD_POR_BITS) { // POR: power-on reset (brownout is separately detected on RP2350)
             return PWRON_RESET;
+        }
 
-        if (*rrp & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_RUN_BITS) // RUN pin
+        if (*rrp & POWMAN_CHIP_RESET_HAD_RUN_LOW_BITS) { // RUN pin
             return RUN_PIN_RESET;
+        }
 
-        if (*rrp & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_PSM_RESTART_BITS) // DEBUG port
-            return DEBUG_RESET; // **** untested **** debug reset may just cause a rebootToBootloader()
+        if ((*rrp & POWMAN_CHIP_RESET_HAD_DP_RESET_REQ_BITS) || (*rrp & POWMAN_CHIP_RESET_HAD_RESCUE_BITS) || (*rrp & POWMAN_CHIP_RESET_HAD_HZD_SYS_RESET_REQ_BITS)) { // DEBUG port
+            return DEBUG_RESET;
+        }
+
+        if (*rrp & POWMAN_CHIP_RESET_HAD_GLITCH_DETECT_BITS) { // power supply glitch
+            return GLITCH_RESET;
+        }
 
+        if (*rrp & POWMAN_CHIP_RESET_HAD_BOR_BITS) { // power supply brownout reset
+            return BROWNOUT_RESET;
+        }
+
+#else
+        io_rw_32 *rrp = (io_rw_32 *)(VREG_AND_CHIP_RESET_BASE + VREG_AND_CHIP_RESET_CHIP_RESET_OFFSET);
+
+        if (*rrp & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_POR_BITS) { // POR: power-on reset or brown-out detection
+            return PWRON_RESET;
+        }
+
+        if (*rrp & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_RUN_BITS) { // RUN pin
+            return RUN_PIN_RESET;
+        }
+
+        if (*rrp & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_PSM_RESTART_BITS) { // DEBUG port
+            return DEBUG_RESET; // **** untested **** debug reset may just cause a rebootToBootloader()
+        }
+#endif
         return UNKNOWN_RESET;
     }