soc/mediatek: Allow specifying multiple EINT base registers

Unlike MT8186/MT8188/MT8192/MT8195, MT8196 has 5 EINT base registers,
each with a different number of EINT bits. In preparation for the
upcoming MT8196 EINT unmasking support, replace the `eint_event_reg`
struct (which has a hardcoded register number) with an array
`eint_event` to specify the EINT base register(s).

BUG=none
TEST=emerge-geralt coreboot
BRANCH=none

Change-Id: I86fd3109c9ff72f33b9fea45587d012b003a34ba
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86033
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/common/eint_event.c

@@ -1,10 +1,30 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <commonlib/bsd/helpers.h>
+#include <device/mmio.h>
 #include <soc/eint_event.h>
+#include <types.h>
+
+/* EINT reg_base + 0x880 is eint_event_mask_clr register with access type W1C. */
+#define EINT_EVENT_MASK_CLR_OFFSET 0x880
+
+#define EINT_VALUE 0xFFFFFFFF
+
+static void enable_eint_event(const struct eint_event_info *event)
+{
+	uint32_t *reg = (uint32_t *)(event->reg_base + EINT_EVENT_MASK_CLR_OFFSET);
+	size_t port = DIV_ROUND_UP(event->eint_num, sizeof(*reg) * BITS_PER_BYTE);
+	int i;
+
+	for (i = 0; i < port; i++)
+		write32p(reg[i], EINT_VALUE);
+}
 
 void unmask_eint_event_mask(void)
 {
-	int i;
-	for (i = 0; i < ARRAY_SIZE(mtk_eint_event->eint_event_mask_clr); i++)
-		write32(&mtk_eint_event->eint_event_mask_clr[i], 0xffffffff);
+	const struct eint_event_info *event = &eint_event[0];
+	while (event->reg_base && event->eint_num) {
+		enable_eint_event(event);
+		event++;
+	}
 }

src/soc/mediatek/common/eint_event_info.c

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+
+#include <soc/addressmap.h>
+#include <soc/eint_event.h>
+
+const struct eint_event_info eint_event[] = {
+	{ EINT_BASE, 224 },
+	{},
+};

src/soc/mediatek/common/include/soc/eint_event.h

@@ -3,18 +3,18 @@
 #ifndef SOC_MEDIATEK_COMMON_EINT_EVENT_H
 #define SOC_MEDIATEK_COMMON_EINT_EVENT_H
 
-#include <device/mmio.h>
-#include <soc/addressmap.h>
+#include <stddef.h>
+#include <stdint.h>
 
-/* eint event mask clear register */
-struct eint_event_reg {
-	uint32_t eint_event_mask_clr[7];
+struct eint_event_info {
+	uintptr_t reg_base;
+	size_t eint_num;
 };
 
-/* eint_base + 0x880 is eint_event_mask_clr register with access type W1C. */
-static struct eint_event_reg *const mtk_eint_event = (void *)(EINT_BASE + 0x880);
+/* An element { 0, 0 } indicates the end of array. */
+extern const struct eint_event_info eint_event[];
 
-/* unmask eint event, eint can wakeup by spm */
+/* Unmask eint event, which can be waken up by SPM. */
 void unmask_eint_event_mask(void);
 
 #endif

src/soc/mediatek/mt8186/Makefile.mk

@@ -12,7 +12,7 @@ all-y += ../common/timer.c ../common/timer_prepare.c
 all-y += ../common/uart.c
 
 bootblock-y += bootblock.c
-bootblock-y += ../common/eint_event.c
+bootblock-y += ../common/eint_event.c ../common/eint_event_info.c
 bootblock-y += gic.c
 bootblock-y += ../common/lastbus_v1.c
 bootblock-y += ../common/mmu_operations.c

src/soc/mediatek/mt8188/Makefile.mk

@@ -10,7 +10,7 @@ all-y += timer.c ../common/timer_prepare.c
 all-y += ../common/uart.c
 
 bootblock-y += ../common/bootblock.c bootblock.c
-bootblock-y += ../common/eint_event.c
+bootblock-y += ../common/eint_event.c ../common/eint_event_info.c
 bootblock-y += ../common/lastbus_v2.c lastbus.c
 bootblock-y += ../common/mmu_operations.c
 bootblock-y += ../common/tracker.c ../common/tracker_v2.c

src/soc/mediatek/mt8192/Makefile.mk

@@ -10,7 +10,7 @@ all-y += ../common/timer.c
 all-y += ../common/uart.c
 
 bootblock-y += bootblock.c
-bootblock-y += ../common/eint_event.c
+bootblock-y += ../common/eint_event.c ../common/eint_event_info.c
 bootblock-y += ../common/mmu_operations.c
 bootblock-y += ../common/pll.c pll.c
 bootblock-y += ../common/tracker.c ../common/tracker_v2.c

src/soc/mediatek/mt8195/Makefile.mk

@@ -11,7 +11,7 @@ all-y += ../common/uart.c
 
 bootblock-y += bootblock.c
 bootblock-y += ../common/early_init.c
-bootblock-y += ../common/eint_event.c
+bootblock-y += ../common/eint_event.c ../common/eint_event_info.c
 bootblock-y += ../common/mmu_operations.c
 bootblock-$(CONFIG_PCI) += ../common/pcie.c pcie.c
 bootblock-y += ../common/pll.c pll.c