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openwrtv4/target/linux/ath79/patches-4.14/0025-MIPS-ath79-drop-irq.c.patch
John Crispin 53c474abbd ath79: add new OF only target for QCA MIPS silicon 
This target aims to replace ar71xx mid-term. The big part that is still
missing is making the MMIO/AHB wifi work using OF. NAND and mikrotik
subtargets will follow.

Signed-off-by: John Crispin <john@phrozen.org>
2018-05-07 08:06:51 +02:00

346 lines
8.7 KiB
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From 08b9cad7da5d981d595fe6d76e9675f85e23e688 Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Tue, 6 Mar 2018 09:57:15 +0100
Subject: [PATCH 25/27] MIPS: ath79: drop irq.c
all IRQ init code will flow via OF based irq chips.
Signed-off-by: John Crispin <john@phrozen.org>
---
arch/mips/ath79/Makefile | 2 +-
arch/mips/ath79/irq.c | 285 -----------------------------------------------
arch/mips/ath79/setup.c | 6 +
3 files changed, 7 insertions(+), 286 deletions(-)
delete mode 100644 arch/mips/ath79/irq.c
diff --git a/arch/mips/ath79/Makefile b/arch/mips/ath79/Makefile
index 783369bc1c5b..bd0c9b8b1b5b 100644
--- a/arch/mips/ath79/Makefile
+++ b/arch/mips/ath79/Makefile
@@ -8,7 +8,7 @@
# under the terms of the GNU General Public License version 2 as published
# by the Free Software Foundation.
-obj-y := prom.o setup.o irq.o common.o clock.o
+obj-y := prom.o setup.o common.o clock.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
diff --git a/arch/mips/ath79/irq.c b/arch/mips/ath79/irq.c
deleted file mode 100644
index 58d17ef6f58f..000000000000
--- a/arch/mips/ath79/irq.c
+++ /dev/null
@@ -1,285 +0,0 @@
-/*
- * Atheros AR71xx/AR724x/AR913x specific interrupt handling
- *
- * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
- * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
- *
- * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irqchip.h>
-#include <linux/of_irq.h>
-
-#include <asm/irq_cpu.h>
-#include <asm/mipsregs.h>
-
-#include <asm/mach-ath79/ath79.h>
-#include <asm/mach-ath79/ar71xx_regs.h>
-#include "common.h"
-#include "machtypes.h"
-
-
-static void ar934x_ip2_irq_dispatch(struct irq_desc *desc)
-{
- u32 status;
-
- status = ath79_reset_rr(AR934X_RESET_REG_PCIE_WMAC_INT_STATUS);
-
- if (status & AR934X_PCIE_WMAC_INT_PCIE_ALL) {
- ath79_ddr_wb_flush(3);
- generic_handle_irq(ATH79_IP2_IRQ(0));
- } else if (status & AR934X_PCIE_WMAC_INT_WMAC_ALL) {
- ath79_ddr_wb_flush(4);
- generic_handle_irq(ATH79_IP2_IRQ(1));
- } else {
- spurious_interrupt();
- }
-}
-
-static void ar934x_ip2_irq_init(void)
-{
- int i;
-
- for (i = ATH79_IP2_IRQ_BASE;
- i < ATH79_IP2_IRQ_BASE + ATH79_IP2_IRQ_COUNT; i++)
- irq_set_chip_and_handler(i, &dummy_irq_chip,
- handle_level_irq);
-
- irq_set_chained_handler(ATH79_CPU_IRQ(2), ar934x_ip2_irq_dispatch);
-}
-
-static void qca953x_ip2_irq_dispatch(struct irq_desc *desc)
-{
- u32 status;
-
- status = ath79_reset_rr(QCA953X_RESET_REG_PCIE_WMAC_INT_STATUS);
-
- if (status & QCA953X_PCIE_WMAC_INT_PCIE_ALL) {
- ath79_ddr_wb_flush(3);
- generic_handle_irq(ATH79_IP2_IRQ(0));
- } else if (status & QCA953X_PCIE_WMAC_INT_WMAC_ALL) {
- ath79_ddr_wb_flush(4);
- generic_handle_irq(ATH79_IP2_IRQ(1));
- } else {
- spurious_interrupt();
- }
-}
-
-static void qca953x_irq_init(void)
-{
- int i;
-
- for (i = ATH79_IP2_IRQ_BASE;
- i < ATH79_IP2_IRQ_BASE + ATH79_IP2_IRQ_COUNT; i++)
- irq_set_chip_and_handler(i, &dummy_irq_chip, handle_level_irq);
-
- irq_set_chained_handler(ATH79_CPU_IRQ(2), qca953x_ip2_irq_dispatch);
-}
-
-static void qca955x_ip2_irq_dispatch(struct irq_desc *desc)
-{
- u32 status;
-
- status = ath79_reset_rr(QCA955X_RESET_REG_EXT_INT_STATUS);
- status &= QCA955X_EXT_INT_PCIE_RC1_ALL | QCA955X_EXT_INT_WMAC_ALL;
-
- if (status == 0) {
- spurious_interrupt();
- return;
- }
-
- if (status & QCA955X_EXT_INT_PCIE_RC1_ALL) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP2_IRQ(0));
- }
-
- if (status & QCA955X_EXT_INT_WMAC_ALL) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP2_IRQ(1));
- }
-}
-
-static void qca955x_ip3_irq_dispatch(struct irq_desc *desc)
-{
- u32 status;
-
- status = ath79_reset_rr(QCA955X_RESET_REG_EXT_INT_STATUS);
- status &= QCA955X_EXT_INT_PCIE_RC2_ALL |
- QCA955X_EXT_INT_USB1 |
- QCA955X_EXT_INT_USB2;
-
- if (status == 0) {
- spurious_interrupt();
- return;
- }
-
- if (status & QCA955X_EXT_INT_USB1) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP3_IRQ(0));
- }
-
- if (status & QCA955X_EXT_INT_USB2) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP3_IRQ(1));
- }
-
- if (status & QCA955X_EXT_INT_PCIE_RC2_ALL) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP3_IRQ(2));
- }
-}
-
-static void qca955x_irq_init(void)
-{
- int i;
-
- for (i = ATH79_IP2_IRQ_BASE;
- i < ATH79_IP2_IRQ_BASE + ATH79_IP2_IRQ_COUNT; i++)
- irq_set_chip_and_handler(i, &dummy_irq_chip,
- handle_level_irq);
-
- irq_set_chained_handler(ATH79_CPU_IRQ(2), qca955x_ip2_irq_dispatch);
-
- for (i = ATH79_IP3_IRQ_BASE;
- i < ATH79_IP3_IRQ_BASE + ATH79_IP3_IRQ_COUNT; i++)
- irq_set_chip_and_handler(i, &dummy_irq_chip,
- handle_level_irq);
-
- irq_set_chained_handler(ATH79_CPU_IRQ(3), qca955x_ip3_irq_dispatch);
-}
-
-static void qca956x_ip2_irq_dispatch(struct irq_desc *desc)
-{
- u32 status;
-
- status = ath79_reset_rr(QCA956X_RESET_REG_EXT_INT_STATUS);
- status &= QCA956X_EXT_INT_PCIE_RC1_ALL | QCA956X_EXT_INT_WMAC_ALL;
-
- if (status == 0) {
- spurious_interrupt();
- return;
- }
-
- if (status & QCA956X_EXT_INT_PCIE_RC1_ALL) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP2_IRQ(0));
- }
-
- if (status & QCA956X_EXT_INT_WMAC_ALL) {
- /* TODO: flsuh DDR? */
- generic_handle_irq(ATH79_IP2_IRQ(1));
- }
-}
-
-static void qca956x_ip3_irq_dispatch(struct irq_desc *desc)
-{
- u32 status;
-
- status = ath79_reset_rr(QCA956X_RESET_REG_EXT_INT_STATUS);
- status &= QCA956X_EXT_INT_PCIE_RC2_ALL |
- QCA956X_EXT_INT_USB1 | QCA956X_EXT_INT_USB2;
-
- if (status == 0) {
- spurious_interrupt();
- return;
- }
-
- if (status & QCA956X_EXT_INT_USB1) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP3_IRQ(0));
- }
-
- if (status & QCA956X_EXT_INT_USB2) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP3_IRQ(1));
- }
-
- if (status & QCA956X_EXT_INT_PCIE_RC2_ALL) {
- /* TODO: flush DDR? */
- generic_handle_irq(ATH79_IP3_IRQ(2));
- }
-}
-
-static void qca956x_enable_timer_cb(void) {
- u32 misc;
-
- misc = ath79_reset_rr(AR71XX_RESET_REG_MISC_INT_ENABLE);
- misc |= MISC_INT_MIPS_SI_TIMERINT_MASK;
- ath79_reset_wr(AR71XX_RESET_REG_MISC_INT_ENABLE, misc);
-}
-
-static void qca956x_irq_init(void)
-{
- int i;
-
- for (i = ATH79_IP2_IRQ_BASE;
- i < ATH79_IP2_IRQ_BASE + ATH79_IP2_IRQ_COUNT; i++)
- irq_set_chip_and_handler(i, &dummy_irq_chip, handle_level_irq);
-
- irq_set_chained_handler(ATH79_CPU_IRQ(2), qca956x_ip2_irq_dispatch);
-
- for (i = ATH79_IP3_IRQ_BASE;
- i < ATH79_IP3_IRQ_BASE + ATH79_IP3_IRQ_COUNT; i++)
- irq_set_chip_and_handler(i, &dummy_irq_chip, handle_level_irq);
-
- irq_set_chained_handler(ATH79_CPU_IRQ(3), qca956x_ip3_irq_dispatch);
-
- /* QCA956x timer init workaround has to be applied right before setting
- * up the clock. Else, there will be no jiffies */
- late_time_init = &qca956x_enable_timer_cb;
-}
-
-void __init arch_init_irq(void)
-{
- unsigned irq_wb_chan2 = -1;
- unsigned irq_wb_chan3 = -1;
- bool misc_is_ar71xx;
-
- if (mips_machtype == ATH79_MACH_GENERIC_OF) {
- irqchip_init();
- return;
- }
-
- if (soc_is_ar71xx() || soc_is_ar724x() ||
- soc_is_ar913x() || soc_is_ar933x()) {
- irq_wb_chan2 = 3;
- irq_wb_chan3 = 2;
- } else if (soc_is_ar934x() || soc_is_qca953x()) {
- irq_wb_chan3 = 2;
- }
-
- ath79_cpu_irq_init(irq_wb_chan2, irq_wb_chan3);
-
- if (soc_is_ar71xx() || soc_is_ar913x())
- misc_is_ar71xx = true;
- else if (soc_is_ar724x() ||
- soc_is_ar933x() ||
- soc_is_ar934x() ||
- soc_is_qca953x() ||
- soc_is_qca955x() ||
- soc_is_qca956x() ||
- soc_is_tp9343())
- misc_is_ar71xx = false;
- else
- BUG();
- ath79_misc_irq_init(
- ath79_reset_base + AR71XX_RESET_REG_MISC_INT_STATUS,
- ATH79_CPU_IRQ(6), ATH79_MISC_IRQ_BASE, misc_is_ar71xx);
-
- if (soc_is_ar934x())
- ar934x_ip2_irq_init();
- else if (soc_is_qca953x())
- qca953x_irq_init();
- else if (soc_is_qca955x())
- qca955x_irq_init();
- else if (soc_is_qca956x() || soc_is_tp9343())
- qca956x_irq_init();
-}
diff --git a/arch/mips/ath79/setup.c b/arch/mips/ath79/setup.c
index 8d7ffa2e8265..7b089c07d2fa 100644
--- a/arch/mips/ath79/setup.c
+++ b/arch/mips/ath79/setup.c
@@ -19,6 +19,7 @@
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/of_fdt.h>
+#include <linux/irqchip.h>
#include <asm/bootinfo.h>
#include <asm/idle.h>
@@ -310,6 +311,11 @@ void __init plat_time_init(void)
mips_hpt_frequency = cpu_clk_rate / 2;
}
+void __init arch_init_irq(void)
+{
+ irqchip_init();
+}
+
static int __init ath79_setup(void)
{
if (mips_machtype == ATH79_MACH_GENERIC_OF)
--
2.11.0
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