142 lines
4.8 KiB
C
142 lines
4.8 KiB
C
/*
|
|
* Copyright (c) 2008, Google Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Copyright (c) 2012, The Linux Foundation. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Google, Inc. nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this
|
|
* software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <debug.h>
|
|
#include <arch/arm.h>
|
|
#include <reg.h>
|
|
#include <kernel/thread.h>
|
|
#include <platform/interrupts.h>
|
|
|
|
#include <platform/irqs.h>
|
|
#include <platform/iomap.h>
|
|
|
|
#define VIC_REG(off) (MSM_VIC_BASE + (off))
|
|
|
|
#define VIC_INT_SELECT0 VIC_REG(0x0000) /* 1: FIQ, 0: IRQ */
|
|
#define VIC_INT_SELECT1 VIC_REG(0x0004) /* 1: FIQ, 0: IRQ */
|
|
#define VIC_INT_EN0 VIC_REG(0x0010)
|
|
#define VIC_INT_EN1 VIC_REG(0x0014)
|
|
#define VIC_INT_ENCLEAR0 VIC_REG(0x0020)
|
|
#define VIC_INT_ENCLEAR1 VIC_REG(0x0024)
|
|
#define VIC_INT_ENSET0 VIC_REG(0x0030)
|
|
#define VIC_INT_ENSET1 VIC_REG(0x0034)
|
|
#define VIC_INT_TYPE0 VIC_REG(0x0040) /* 1: EDGE, 0: LEVEL */
|
|
#define VIC_INT_TYPE1 VIC_REG(0x0044) /* 1: EDGE, 0: LEVEL */
|
|
#define VIC_INT_POLARITY0 VIC_REG(0x0050) /* 1: NEG, 0: POS */
|
|
#define VIC_INT_POLARITY1 VIC_REG(0x0054) /* 1: NEG, 0: POS */
|
|
#define VIC_NO_PEND_VAL VIC_REG(0x0060)
|
|
#define VIC_INT_MASTEREN VIC_REG(0x0064) /* 1: IRQ, 2: FIQ */
|
|
#define VIC_PROTECTION VIC_REG(0x006C) /* 1: ENABLE */
|
|
#define VIC_CONFIG VIC_REG(0x0068) /* 1: USE ARM1136 VIC */
|
|
#define VIC_IRQ_STATUS0 VIC_REG(0x0080)
|
|
#define VIC_IRQ_STATUS1 VIC_REG(0x0084)
|
|
#define VIC_FIQ_STATUS0 VIC_REG(0x0090)
|
|
#define VIC_FIQ_STATUS1 VIC_REG(0x0094)
|
|
#define VIC_RAW_STATUS0 VIC_REG(0x00A0)
|
|
#define VIC_RAW_STATUS1 VIC_REG(0x00A4)
|
|
#define VIC_INT_CLEAR0 VIC_REG(0x00B0)
|
|
#define VIC_INT_CLEAR1 VIC_REG(0x00B4)
|
|
#define VIC_SOFTINT0 VIC_REG(0x00C0)
|
|
#define VIC_SOFTINT1 VIC_REG(0x00C4)
|
|
#define VIC_IRQ_VEC_RD VIC_REG(0x00D0) /* pending int # */
|
|
#define VIC_IRQ_VEC_PEND_RD VIC_REG(0x00D4) /* pending vector addr */
|
|
#define VIC_IRQ_VEC_WR VIC_REG(0x00D8)
|
|
#define VIC_IRQ_IN_SERVICE VIC_REG(0x00E0)
|
|
#define VIC_IRQ_IN_STACK VIC_REG(0x00E4)
|
|
#define VIC_TEST_BUS_SEL VIC_REG(0x00E8)
|
|
|
|
struct ihandler {
|
|
int_handler func;
|
|
void *arg;
|
|
};
|
|
|
|
static struct ihandler handler[NR_IRQS_VIC];
|
|
|
|
void platform_init_interrupts(void)
|
|
{
|
|
writel(0xffffffff, VIC_INT_CLEAR0);
|
|
writel(0xffffffff, VIC_INT_CLEAR1);
|
|
writel(0, VIC_INT_SELECT0);
|
|
writel(0, VIC_INT_SELECT1);
|
|
writel(0xffffffff, VIC_INT_TYPE0);
|
|
writel(0xffffffff, VIC_INT_TYPE1);
|
|
writel(0, VIC_CONFIG);
|
|
writel(1, VIC_INT_MASTEREN);
|
|
}
|
|
|
|
enum handler_return vic_platform_irq(struct arm_iframe *frame)
|
|
{
|
|
unsigned num;
|
|
enum handler_return ret;
|
|
num = readl(VIC_IRQ_VEC_RD);
|
|
num = readl(VIC_IRQ_VEC_PEND_RD);
|
|
if (num > NR_IRQS_VIC)
|
|
return 0;
|
|
writel(1 << (num & 31), (num > 31) ? VIC_INT_CLEAR1 : VIC_INT_CLEAR0);
|
|
ret = handler[num].func(handler[num].arg);
|
|
writel(0, VIC_IRQ_VEC_WR);
|
|
return ret;
|
|
}
|
|
|
|
void vic_platform_fiq(struct arm_iframe *frame)
|
|
{
|
|
PANIC_UNIMPLEMENTED;
|
|
}
|
|
|
|
status_t vic_mask_interrupt(unsigned int vector)
|
|
{
|
|
unsigned reg = (vector > 31) ? VIC_INT_ENCLEAR1 : VIC_INT_ENCLEAR0;
|
|
unsigned bit = 1 << (vector & 31);
|
|
writel(bit, reg);
|
|
return 0;
|
|
}
|
|
|
|
status_t vic_unmask_interrupt(unsigned int vector)
|
|
{
|
|
unsigned reg = (vector > 31) ? VIC_INT_ENSET1 : VIC_INT_ENSET0;
|
|
unsigned bit = 1 << (vector & 31);
|
|
writel(bit, reg);
|
|
return 0;
|
|
}
|
|
|
|
void vic_register_int_handler(unsigned int vector, int_handler func, void *arg)
|
|
{
|
|
if (vector >= NR_IRQS_VIC)
|
|
return;
|
|
|
|
enter_critical_section();
|
|
handler[vector].func = func;
|
|
handler[vector].arg = arg;
|
|
exit_critical_section();
|
|
}
|