summaryrefslogtreecommitdiffstats
path: root/arch/arm/plat-spear/shirq.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-spear/shirq.c')
-rw-r--r--arch/arm/plat-spear/shirq.c118
1 files changed, 0 insertions, 118 deletions
diff --git a/arch/arm/plat-spear/shirq.c b/arch/arm/plat-spear/shirq.c
deleted file mode 100644
index 853e891e1184..000000000000
--- a/arch/arm/plat-spear/shirq.c
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * arch/arm/plat-spear/shirq.c
- *
- * SPEAr platform shared irq layer source file
- *
- * Copyright (C) 2009 ST Microelectronics
- * Viresh Kumar <viresh.linux@gmail.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/spinlock.h>
-#include <plat/shirq.h>
-
-struct spear_shirq *shirq;
-static DEFINE_SPINLOCK(lock);
-
-static void shirq_irq_mask(struct irq_data *d)
-{
- struct spear_shirq *shirq = irq_data_get_irq_chip_data(d);
- u32 val, id = d->irq - shirq->dev_config[0].virq;
- unsigned long flags;
-
- if ((shirq->regs.enb_reg == -1) || shirq->dev_config[id].enb_mask == -1)
- return;
-
- spin_lock_irqsave(&lock, flags);
- val = readl(shirq->regs.base + shirq->regs.enb_reg);
- if (shirq->regs.reset_to_enb)
- val |= shirq->dev_config[id].enb_mask;
- else
- val &= ~(shirq->dev_config[id].enb_mask);
- writel(val, shirq->regs.base + shirq->regs.enb_reg);
- spin_unlock_irqrestore(&lock, flags);
-}
-
-static void shirq_irq_unmask(struct irq_data *d)
-{
- struct spear_shirq *shirq = irq_data_get_irq_chip_data(d);
- u32 val, id = d->irq - shirq->dev_config[0].virq;
- unsigned long flags;
-
- if ((shirq->regs.enb_reg == -1) || shirq->dev_config[id].enb_mask == -1)
- return;
-
- spin_lock_irqsave(&lock, flags);
- val = readl(shirq->regs.base + shirq->regs.enb_reg);
- if (shirq->regs.reset_to_enb)
- val &= ~(shirq->dev_config[id].enb_mask);
- else
- val |= shirq->dev_config[id].enb_mask;
- writel(val, shirq->regs.base + shirq->regs.enb_reg);
- spin_unlock_irqrestore(&lock, flags);
-}
-
-static struct irq_chip shirq_chip = {
- .name = "spear_shirq",
- .irq_ack = shirq_irq_mask,
- .irq_mask = shirq_irq_mask,
- .irq_unmask = shirq_irq_unmask,
-};
-
-static void shirq_handler(unsigned irq, struct irq_desc *desc)
-{
- u32 i, val, mask;
- struct spear_shirq *shirq = irq_get_handler_data(irq);
-
- desc->irq_data.chip->irq_ack(&desc->irq_data);
- while ((val = readl(shirq->regs.base + shirq->regs.status_reg) &
- shirq->regs.status_reg_mask)) {
- for (i = 0; (i < shirq->dev_count) && val; i++) {
- if (!(shirq->dev_config[i].status_mask & val))
- continue;
-
- generic_handle_irq(shirq->dev_config[i].virq);
-
- /* clear interrupt */
- val &= ~shirq->dev_config[i].status_mask;
- if ((shirq->regs.clear_reg == -1) ||
- shirq->dev_config[i].clear_mask == -1)
- continue;
- mask = readl(shirq->regs.base + shirq->regs.clear_reg);
- if (shirq->regs.reset_to_clear)
- mask &= ~shirq->dev_config[i].clear_mask;
- else
- mask |= shirq->dev_config[i].clear_mask;
- writel(mask, shirq->regs.base + shirq->regs.clear_reg);
- }
- }
- desc->irq_data.chip->irq_unmask(&desc->irq_data);
-}
-
-int spear_shirq_register(struct spear_shirq *shirq)
-{
- int i;
-
- if (!shirq || !shirq->dev_config || !shirq->regs.base)
- return -EFAULT;
-
- if (!shirq->dev_count)
- return -EINVAL;
-
- irq_set_chained_handler(shirq->irq, shirq_handler);
- for (i = 0; i < shirq->dev_count; i++) {
- irq_set_chip_and_handler(shirq->dev_config[i].virq,
- &shirq_chip, handle_simple_irq);
- set_irq_flags(shirq->dev_config[i].virq, IRQF_VALID);
- irq_set_chip_data(shirq->dev_config[i].virq, shirq);
- }
-
- irq_set_handler_data(shirq->irq, shirq);
- return 0;
-}