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Diffstat (limited to 'arch/sh/boards/mach-cayman/irq.c')
-rw-r--r--arch/sh/boards/mach-cayman/irq.c154
1 files changed, 0 insertions, 154 deletions
diff --git a/arch/sh/boards/mach-cayman/irq.c b/arch/sh/boards/mach-cayman/irq.c
deleted file mode 100644
index 9108789fafef..000000000000
--- a/arch/sh/boards/mach-cayman/irq.c
+++ /dev/null
@@ -1,154 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * arch/sh/mach-cayman/irq.c - SH-5 Cayman Interrupt Support
- *
- * This file handles the board specific parts of the Cayman interrupt system
- *
- * Copyright (C) 2002 Stuart Menefy
- */
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/signal.h>
-#include <cpu/irq.h>
-#include <asm/page.h>
-
-/* Setup for the SMSC FDC37C935 / LAN91C100FD */
-#define SMSC_IRQ IRQ_IRL1
-
-/* Setup for PCI Bus 2, which transmits interrupts via the EPLD */
-#define PCI2_IRQ IRQ_IRL3
-
-unsigned long epld_virt;
-
-#define EPLD_BASE 0x04002000
-#define EPLD_STATUS_BASE (epld_virt + 0x10)
-#define EPLD_MASK_BASE (epld_virt + 0x20)
-
-/* Note the SMSC SuperIO chip and SMSC LAN chip interrupts are all muxed onto
- the same SH-5 interrupt */
-
-static irqreturn_t cayman_interrupt_smsc(int irq, void *dev_id)
-{
- printk(KERN_INFO "CAYMAN: spurious SMSC interrupt\n");
- return IRQ_NONE;
-}
-
-static irqreturn_t cayman_interrupt_pci2(int irq, void *dev_id)
-{
- printk(KERN_INFO "CAYMAN: spurious PCI interrupt, IRQ %d\n", irq);
- return IRQ_NONE;
-}
-
-static struct irqaction cayman_action_smsc = {
- .name = "Cayman SMSC Mux",
- .handler = cayman_interrupt_smsc,
-};
-
-static struct irqaction cayman_action_pci2 = {
- .name = "Cayman PCI2 Mux",
- .handler = cayman_interrupt_pci2,
-};
-
-static void enable_cayman_irq(struct irq_data *data)
-{
- unsigned int irq = data->irq;
- unsigned long flags;
- unsigned long mask;
- unsigned int reg;
- unsigned char bit;
-
- irq -= START_EXT_IRQS;
- reg = EPLD_MASK_BASE + ((irq / 8) << 2);
- bit = 1<<(irq % 8);
- local_irq_save(flags);
- mask = __raw_readl(reg);
- mask |= bit;
- __raw_writel(mask, reg);
- local_irq_restore(flags);
-}
-
-static void disable_cayman_irq(struct irq_data *data)
-{
- unsigned int irq = data->irq;
- unsigned long flags;
- unsigned long mask;
- unsigned int reg;
- unsigned char bit;
-
- irq -= START_EXT_IRQS;
- reg = EPLD_MASK_BASE + ((irq / 8) << 2);
- bit = 1<<(irq % 8);
- local_irq_save(flags);
- mask = __raw_readl(reg);
- mask &= ~bit;
- __raw_writel(mask, reg);
- local_irq_restore(flags);
-}
-
-struct irq_chip cayman_irq_type = {
- .name = "Cayman-IRQ",
- .irq_unmask = enable_cayman_irq,
- .irq_mask = disable_cayman_irq,
-};
-
-int cayman_irq_demux(int evt)
-{
- int irq = intc_evt_to_irq[evt];
-
- if (irq == SMSC_IRQ) {
- unsigned long status;
- int i;
-
- status = __raw_readl(EPLD_STATUS_BASE) &
- __raw_readl(EPLD_MASK_BASE) & 0xff;
- if (status == 0) {
- irq = -1;
- } else {
- for (i=0; i<8; i++) {
- if (status & (1<<i))
- break;
- }
- irq = START_EXT_IRQS + i;
- }
- }
-
- if (irq == PCI2_IRQ) {
- unsigned long status;
- int i;
-
- status = __raw_readl(EPLD_STATUS_BASE + 3 * sizeof(u32)) &
- __raw_readl(EPLD_MASK_BASE + 3 * sizeof(u32)) & 0xff;
- if (status == 0) {
- irq = -1;
- } else {
- for (i=0; i<8; i++) {
- if (status & (1<<i))
- break;
- }
- irq = START_EXT_IRQS + (3 * 8) + i;
- }
- }
-
- return irq;
-}
-
-void init_cayman_irq(void)
-{
- int i;
-
- epld_virt = (unsigned long)ioremap_nocache(EPLD_BASE, 1024);
- if (!epld_virt) {
- printk(KERN_ERR "Cayman IRQ: Unable to remap EPLD\n");
- return;
- }
-
- for (i = 0; i < NR_EXT_IRQS; i++) {
- irq_set_chip_and_handler(START_EXT_IRQS + i,
- &cayman_irq_type, handle_level_irq);
- }
-
- /* Setup the SMSC interrupt */
- setup_irq(SMSC_IRQ, &cayman_action_smsc);
- setup_irq(PCI2_IRQ, &cayman_action_pci2);
-}