zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-at91/irq.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-at91/irq.c
new file mode 100644
index 0000000..cfcfcbe
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-at91/irq.c
@@ -0,0 +1,246 @@
+/*
+ * linux/arch/arm/mach-at91/irq.c
+ *
+ * Copyright (C) 2004 SAN People
+ * Copyright (C) 2004 ATMEL
+ * Copyright (C) Rick Bronson
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <linux/irq.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/err.h>
+
+#include <mach/hardware.h>
+#include <asm/irq.h>
+#include <asm/setup.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/map.h>
+
+void __iomem *at91_aic_base;
+static struct irq_domain *at91_aic_domain;
+static struct device_node *at91_aic_np;
+
+static void at91_aic_mask_irq(struct irq_data *d)
+{
+ /* Disable interrupt on AIC */
+ at91_aic_write(AT91_AIC_IDCR, 1 << d->hwirq);
+}
+
+static void at91_aic_unmask_irq(struct irq_data *d)
+{
+ /* Enable interrupt on AIC */
+ at91_aic_write(AT91_AIC_IECR, 1 << d->hwirq);
+}
+
+unsigned int at91_extern_irq;
+
+#define is_extern_irq(hwirq) ((1 << (hwirq)) & at91_extern_irq)
+
+static int at91_aic_set_type(struct irq_data *d, unsigned type)
+{
+ unsigned int smr, srctype;
+
+ switch (type) {
+ case IRQ_TYPE_LEVEL_HIGH:
+ srctype = AT91_AIC_SRCTYPE_HIGH;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ srctype = AT91_AIC_SRCTYPE_RISING;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ if ((d->hwirq == AT91_ID_FIQ) || is_extern_irq(d->hwirq)) /* only supported on external interrupts */
+ srctype = AT91_AIC_SRCTYPE_LOW;
+ else
+ return -EINVAL;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ if ((d->hwirq == AT91_ID_FIQ) || is_extern_irq(d->hwirq)) /* only supported on external interrupts */
+ srctype = AT91_AIC_SRCTYPE_FALLING;
+ else
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ smr = at91_aic_read(AT91_AIC_SMR(d->hwirq)) & ~AT91_AIC_SRCTYPE;
+ at91_aic_write(AT91_AIC_SMR(d->hwirq), smr | srctype);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+static u32 wakeups;
+static u32 backups;
+
+static int at91_aic_set_wake(struct irq_data *d, unsigned value)
+{
+ if (unlikely(d->hwirq >= NR_AIC_IRQS))
+ return -EINVAL;
+
+ if (value)
+ wakeups |= (1 << d->hwirq);
+ else
+ wakeups &= ~(1 << d->hwirq);
+
+ return 0;
+}
+
+void at91_irq_suspend(void)
+{
+ backups = at91_aic_read(AT91_AIC_IMR);
+ at91_aic_write(AT91_AIC_IDCR, backups);
+ at91_aic_write(AT91_AIC_IECR, wakeups);
+}
+
+void at91_irq_resume(void)
+{
+ at91_aic_write(AT91_AIC_IDCR, wakeups);
+ at91_aic_write(AT91_AIC_IECR, backups);
+}
+
+#else
+#define at91_aic_set_wake NULL
+#endif
+
+static struct irq_chip at91_aic_chip = {
+ .name = "AIC",
+ .irq_ack = at91_aic_mask_irq,
+ .irq_mask = at91_aic_mask_irq,
+ .irq_unmask = at91_aic_unmask_irq,
+ .irq_set_type = at91_aic_set_type,
+ .irq_set_wake = at91_aic_set_wake,
+};
+
+static void __init at91_aic_hw_init(unsigned int spu_vector)
+{
+ int i;
+
+ /*
+ * Perform 8 End Of Interrupt Command to make sure AIC
+ * will not Lock out nIRQ
+ */
+ for (i = 0; i < 8; i++)
+ at91_aic_write(AT91_AIC_EOICR, 0);
+
+ /*
+ * Spurious Interrupt ID in Spurious Vector Register.
+ * When there is no current interrupt, the IRQ Vector Register
+ * reads the value stored in AIC_SPU
+ */
+ at91_aic_write(AT91_AIC_SPU, spu_vector);
+
+ /* No debugging in AIC: Debug (Protect) Control Register */
+ at91_aic_write(AT91_AIC_DCR, 0);
+
+ /* Disable and clear all interrupts initially */
+ at91_aic_write(AT91_AIC_IDCR, 0xFFFFFFFF);
+ at91_aic_write(AT91_AIC_ICCR, 0xFFFFFFFF);
+}
+
+#if defined(CONFIG_OF)
+static int at91_aic_irq_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ /* Put virq number in Source Vector Register */
+ at91_aic_write(AT91_AIC_SVR(hw), virq);
+
+ /* Active Low interrupt, without priority */
+ at91_aic_write(AT91_AIC_SMR(hw), AT91_AIC_SRCTYPE_LOW);
+
+ irq_set_chip_and_handler(virq, &at91_aic_chip, handle_level_irq);
+ set_irq_flags(virq, IRQF_VALID | IRQF_PROBE);
+
+ return 0;
+}
+
+static struct irq_domain_ops at91_aic_irq_ops = {
+ .map = at91_aic_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+int __init at91_aic_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ at91_aic_base = of_iomap(node, 0);
+ at91_aic_np = node;
+
+ at91_aic_domain = irq_domain_add_linear(at91_aic_np, NR_AIC_IRQS,
+ &at91_aic_irq_ops, NULL);
+ if (!at91_aic_domain)
+ panic("Unable to add AIC irq domain (DT)\n");
+
+ irq_set_default_host(at91_aic_domain);
+
+ at91_aic_hw_init(NR_AIC_IRQS);
+
+ return 0;
+}
+#endif
+
+/*
+ * Initialize the AIC interrupt controller.
+ */
+void __init at91_aic_init(unsigned int priority[NR_AIC_IRQS])
+{
+ unsigned int i;
+ int irq_base;
+
+ at91_aic_base = ioremap(AT91_AIC, 512);
+ if (!at91_aic_base)
+ panic("Unable to ioremap AIC registers\n");
+
+ /* Add irq domain for AIC */
+ irq_base = irq_alloc_descs(-1, 0, NR_AIC_IRQS, 0);
+ if (irq_base < 0) {
+ WARN(1, "Cannot allocate irq_descs, assuming pre-allocated\n");
+ irq_base = 0;
+ }
+ at91_aic_domain = irq_domain_add_legacy(at91_aic_np, NR_AIC_IRQS,
+ irq_base, 0,
+ &irq_domain_simple_ops, NULL);
+
+ if (!at91_aic_domain)
+ panic("Unable to add AIC irq domain\n");
+
+ irq_set_default_host(at91_aic_domain);
+
+ /*
+ * The IVR is used by macro get_irqnr_and_base to read and verify.
+ * The irq number is NR_AIC_IRQS when a spurious interrupt has occurred.
+ */
+ for (i = 0; i < NR_AIC_IRQS; i++) {
+ /* Put hardware irq number in Source Vector Register: */
+ at91_aic_write(AT91_AIC_SVR(i), i);
+ /* Active Low interrupt, with the specified priority */
+ at91_aic_write(AT91_AIC_SMR(i), AT91_AIC_SRCTYPE_LOW | priority[i]);
+
+ irq_set_chip_and_handler(i, &at91_aic_chip, handle_level_irq);
+ set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
+ }
+
+ at91_aic_hw_init(NR_AIC_IRQS);
+}