From 0378f059440d4702203f9bc005894f7b53cad889 Mon Sep 17 00:00:00 2001
From: "Luke T. Shumaker" <lukeshu@lukeshu.com>
Date: Wed, 26 Mar 2025 21:20:54 -0600
Subject: Have libhw_generic be independent of libcr, rename libhw to libhw_cr

---
 libhw/rp2040_gpioirq.c | 75 --------------------------------------------------
 1 file changed, 75 deletions(-)
 delete mode 100644 libhw/rp2040_gpioirq.c

(limited to 'libhw/rp2040_gpioirq.c')

diff --git a/libhw/rp2040_gpioirq.c b/libhw/rp2040_gpioirq.c
deleted file mode 100644
index 2f0ceac..0000000
--- a/libhw/rp2040_gpioirq.c
+++ /dev/null
@@ -1,75 +0,0 @@
-/* libhw/rp2040_gpioirq.c - Utilities for sharing the GPIO IRQ (IO_IRQ_BANK0)
- *
- * Copyright (C) 2025  Luke T. Shumaker <lukeshu@lukeshu.com>
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-
-#include <hardware/structs/io_bank0.h> /* for io_bank0_hw */
-#include <hardware/irq.h> /* for irq_set_exclusive_handler() */
-
-#include <libmisc/macro.h>
-
-#include "rp2040_gpioirq.h"
-
-struct gpioirq_handler_entry {
-	gpioirq_handler_t        fn;
-	void                    *arg;
-};
-struct gpioirq_handler_entry gpioirq_handlers[NUM_BANK0_GPIOS][4] = {0};
-
-int gpioirq_core = -1;
-
-static void gpioirq_handler(void) {
-	uint core = get_core_num();
-	io_bank0_irq_ctrl_hw_t *irq_ctrl_base;
-	switch (core) {
-	case 0: irq_ctrl_base = &io_bank0_hw->proc0_irq_ctrl; break;
-	case 1: irq_ctrl_base = &io_bank0_hw->proc1_irq_ctrl; break;
-	default: assert_notreached("invalid core number");
-	}
-	for (uint regnum = 0; regnum < LM_ARRAY_LEN(irq_ctrl_base->ints); regnum++) {
-		uint32_t regval = irq_ctrl_base->ints[regnum];
-		for (uint bit = 0; bit < 32 && (regnum*8)+(bit/4) < NUM_BANK0_GPIOS; bit++) {
-			if (regval & 1u<<bit) {
-				uint gpio = (regnum*8)+(bit/4);
-				uint event_idx = bit%4;
-				struct gpioirq_handler_entry *handler = &gpioirq_handlers[gpio][event_idx];
-				if (handler->fn)
-					handler->fn(handler->arg, gpio, 1u<<event_idx);
-			}
-		}
-		/* acknowledge irq */
-		io_bank0_hw->intr[regnum] = regval;
-	}
-}
-
-void gpioirq_set_and_enable_exclusive_handler(uint gpio, enum gpio_irq_level event, gpioirq_handler_t fn, void *arg) {
-	assert(gpio < NUM_BANK0_GPIOS);
-	assert(event == GPIO_IRQ_LEVEL_LOW ||
-	       event == GPIO_IRQ_LEVEL_HIGH ||
-	       event == GPIO_IRQ_EDGE_FALL ||
-	       event == GPIO_IRQ_EDGE_RISE);
-	assert(fn);
-
-	uint event_idx = LM_FLOORLOG2(event);
-	assert(gpioirq_handlers[gpio][event_idx].fn == NULL);
-
-	uint core = get_core_num();
-	assert(gpioirq_core == -1 || gpioirq_core == (int)core);
-
-	io_bank0_irq_ctrl_hw_t *irq_ctrl_base;
-	switch (core) {
-	case 0: irq_ctrl_base = &io_bank0_hw->proc0_irq_ctrl; break;
-	case 1: irq_ctrl_base = &io_bank0_hw->proc1_irq_ctrl; break;
-	default: assert_notreached("invalid core number");
-	}
-
-	gpioirq_handlers[gpio][event_idx].fn = fn;
-	gpioirq_handlers[gpio][event_idx].arg = arg;
-	hw_set_bits(&irq_ctrl_base->inte[gpio/8], 1u<<((4*(gpio%8))+event_idx));
-	if (gpioirq_core == -1) {
-		irq_set_exclusive_handler(IO_IRQ_BANK0, gpioirq_handler);
-		irq_set_enabled(IO_IRQ_BANK0, true);
-		gpioirq_core = core;
-	}
-}
-- 
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