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linux-2.6/arch/powerpc/sysdev/ipic.c
dayu@datangmobile.cn 30c404699d powerpc/83xx: Fix the interrupt loss problem on ipic 
The interrupt pending register is write 1 clear.  If there are more than
one external interrupts pending at the same time, acking the first
interrupt by reading pending register then OR the corresponding bit and
write back to pending register will also clear other interrupt pending
bits.  That will cause loss of interrupt.

Signed-off-by: Da Yu <dayu@datangmobile.cn>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2009-03-09 09:25:35 -05:00

992 lines
21 KiB
C
Raw Blame History

/*
* arch/powerpc/sysdev/ipic.c
*
* IPIC routines implementations.
*
* Copyright 2005 Freescale Semiconductor, Inc.
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/slab.h>
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/sysdev.h>
#include <linux/device.h>
#include <linux/bootmem.h>
#include <linux/spinlock.h>
#include <linux/fsl_devices.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/ipic.h>
#include "ipic.h"
static struct ipic * primary_ipic;
static struct irq_chip ipic_level_irq_chip, ipic_edge_irq_chip;
static DEFINE_SPINLOCK(ipic_lock);
static struct ipic_info ipic_info[] = {
[1] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
.bit = 16,
.prio_mask = 0,
},
[2] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
.bit = 17,
.prio_mask = 1,
},
[3] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
.bit = 18,
.prio_mask = 2,
},
[4] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
.bit = 19,
.prio_mask = 3,
},
[5] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
.bit = 20,
.prio_mask = 4,
},
[6] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
.bit = 21,
.prio_mask = 5,
},
[7] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
.bit = 22,
.prio_mask = 6,
},
[8] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_C,
.force = IPIC_SIFCR_H,
.bit = 23,
.prio_mask = 7,
},
[9] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 24,
.prio_mask = 0,
},
[10] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 25,
.prio_mask = 1,
},
[11] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 26,
.prio_mask = 2,
},
[12] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 27,
.prio_mask = 3,
},
[13] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 28,
.prio_mask = 4,
},
[14] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 29,
.prio_mask = 5,
},
[15] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 30,
.prio_mask = 6,
},
[16] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 31,
.prio_mask = 7,
},
[17] = {
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
.bit = 1,
.prio_mask = 5,
},
[18] = {
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
.bit = 2,
.prio_mask = 6,
},
[19] = {
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
.bit = 3,
.prio_mask = 7,
},
[20] = {
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
.bit = 4,
.prio_mask = 4,
},
[21] = {
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
.bit = 5,
.prio_mask = 5,
},
[22] = {
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
.bit = 6,
.prio_mask = 6,
},
[23] = {
.ack = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
.bit = 7,
.prio_mask = 7,
},
[32] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 0,
.prio_mask = 0,
},
[33] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 1,
.prio_mask = 1,
},
[34] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 2,
.prio_mask = 2,
},
[35] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 3,
.prio_mask = 3,
},
[36] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 4,
.prio_mask = 4,
},
[37] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 5,
.prio_mask = 5,
},
[38] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 6,
.prio_mask = 6,
},
[39] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 7,
.prio_mask = 7,
},
[40] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
.bit = 8,
.prio_mask = 0,
},
[41] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
.bit = 9,
.prio_mask = 1,
},
[42] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
.bit = 10,
.prio_mask = 2,
},
[43] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
.bit = 11,
.prio_mask = 3,
},
[44] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
.bit = 12,
.prio_mask = 4,
},
[45] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
.bit = 13,
.prio_mask = 5,
},
[46] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
.bit = 14,
.prio_mask = 6,
},
[47] = {
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_B,
.force = IPIC_SIFCR_H,
.bit = 15,
.prio_mask = 7,
},
[48] = {
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
.bit = 0,
.prio_mask = 4,
},
[64] = {
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
.bit = 0,
.prio_mask = 0,
},
[65] = {
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
.bit = 1,
.prio_mask = 1,
},
[66] = {
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
.bit = 2,
.prio_mask = 2,
},
[67] = {
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
.bit = 3,
.prio_mask = 3,
},
[68] = {
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
.bit = 4,
.prio_mask = 0,
},
[69] = {
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
.bit = 5,
.prio_mask = 1,
},
[70] = {
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
.bit = 6,
.prio_mask = 2,
},
[71] = {
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
.bit = 7,
.prio_mask = 3,
},
[72] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 8,
},
[73] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 9,
},
[74] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 10,
},
[75] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 11,
},
[76] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 12,
},
[77] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 13,
},
[78] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 14,
},
[79] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 15,
},
[80] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 16,
},
[81] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 17,
},
[82] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 18,
},
[83] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 19,
},
[84] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 20,
},
[85] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 21,
},
[86] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 22,
},
[87] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 23,
},
[88] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 24,
},
[89] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 25,
},
[90] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 26,
},
[91] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 27,
},
[94] = {
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 30,
},
};
static inline u32 ipic_read(volatile u32 __iomem *base, unsigned int reg)
{
return in_be32(base + (reg >> 2));
}
static inline void ipic_write(volatile u32 __iomem *base, unsigned int reg, u32 value)
{
out_be32(base + (reg >> 2), value);
}
static inline struct ipic * ipic_from_irq(unsigned int virq)
{
return primary_ipic;
}
#define ipic_irq_to_hw(virq) ((unsigned int)irq_map[virq].hwirq)
static void ipic_unmask_irq(unsigned int virq)
{
struct ipic *ipic = ipic_from_irq(virq);
unsigned int src = ipic_irq_to_hw(virq);
unsigned long flags;
u32 temp;
spin_lock_irqsave(&ipic_lock, flags);
temp = ipic_read(ipic->regs, ipic_info[src].mask);
temp |= (1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].mask, temp);
spin_unlock_irqrestore(&ipic_lock, flags);
}
static void ipic_mask_irq(unsigned int virq)
{
struct ipic *ipic = ipic_from_irq(virq);
unsigned int src = ipic_irq_to_hw(virq);
unsigned long flags;
u32 temp;
spin_lock_irqsave(&ipic_lock, flags);
temp = ipic_read(ipic->regs, ipic_info[src].mask);
temp &= ~(1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].mask, temp);
/* mb() can't guarantee that masking is finished. But it does finish
* for nearly all cases. */
mb();
spin_unlock_irqrestore(&ipic_lock, flags);
}
static void ipic_ack_irq(unsigned int virq)
{
struct ipic *ipic = ipic_from_irq(virq);
unsigned int src = ipic_irq_to_hw(virq);
unsigned long flags;
u32 temp;
spin_lock_irqsave(&ipic_lock, flags);
temp = 1 << (31 - ipic_info[src].bit);
ipic_write(ipic->regs, ipic_info[src].ack, temp);
/* mb() can't guarantee that ack is finished. But it does finish
* for nearly all cases. */
mb();
spin_unlock_irqrestore(&ipic_lock, flags);
}
static void ipic_mask_irq_and_ack(unsigned int virq)
{
struct ipic *ipic = ipic_from_irq(virq);
unsigned int src = ipic_irq_to_hw(virq);
unsigned long flags;
u32 temp;
spin_lock_irqsave(&ipic_lock, flags);
temp = ipic_read(ipic->regs, ipic_info[src].mask);
temp &= ~(1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].mask, temp);
temp = 1 << (31 - ipic_info[src].bit);
ipic_write(ipic->regs, ipic_info[src].ack, temp);
/* mb() can't guarantee that ack is finished. But it does finish
* for nearly all cases. */
mb();
spin_unlock_irqrestore(&ipic_lock, flags);
}
static int ipic_set_irq_type(unsigned int virq, unsigned int flow_type)
{
struct ipic *ipic = ipic_from_irq(virq);
unsigned int src = ipic_irq_to_hw(virq);
struct irq_desc *desc = get_irq_desc(virq);
unsigned int vold, vnew, edibit;
if (flow_type == IRQ_TYPE_NONE)
flow_type = IRQ_TYPE_LEVEL_LOW;
/* ipic supports only low assertion and high-to-low change senses
*/
if (!(flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING))) {
printk(KERN_ERR "ipic: sense type 0x%x not supported\n",
flow_type);
return -EINVAL;
}
/* ipic supports only edge mode on external interrupts */
if ((flow_type & IRQ_TYPE_EDGE_FALLING) && !ipic_info[src].ack) {
printk(KERN_ERR "ipic: edge sense not supported on internal "
"interrupts\n");
return -EINVAL;
}
desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
if (flow_type & IRQ_TYPE_LEVEL_LOW) {
desc->status |= IRQ_LEVEL;
desc->handle_irq = handle_level_irq;
desc->chip = &ipic_level_irq_chip;
} else {
desc->handle_irq = handle_edge_irq;
desc->chip = &ipic_edge_irq_chip;
}
/* only EXT IRQ senses are programmable on ipic
* internal IRQ senses are LEVEL_LOW
*/
if (src == IPIC_IRQ_EXT0)
edibit = 15;
else
if (src >= IPIC_IRQ_EXT1 && src <= IPIC_IRQ_EXT7)
edibit = (14 - (src - IPIC_IRQ_EXT1));
else
return (flow_type & IRQ_TYPE_LEVEL_LOW) ? 0 : -EINVAL;
vold = ipic_read(ipic->regs, IPIC_SECNR);
if ((flow_type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_FALLING) {
vnew = vold | (1 << edibit);
} else {
vnew = vold & ~(1 << edibit);
}
if (vold != vnew)
ipic_write(ipic->regs, IPIC_SECNR, vnew);
return 0;
}
/* level interrupts and edge interrupts have different ack operations */
static struct irq_chip ipic_level_irq_chip = {
.typename = " IPIC ",
.unmask = ipic_unmask_irq,
.mask = ipic_mask_irq,
.mask_ack = ipic_mask_irq,
.set_type = ipic_set_irq_type,
};
static struct irq_chip ipic_edge_irq_chip = {
.typename = " IPIC ",
.unmask = ipic_unmask_irq,
.mask = ipic_mask_irq,
.mask_ack = ipic_mask_irq_and_ack,
.ack = ipic_ack_irq,
.set_type = ipic_set_irq_type,
};
static int ipic_host_match(struct irq_host *h, struct device_node *node)
{
/* Exact match, unless ipic node is NULL */
return h->of_node == NULL || h->of_node == node;
}
static int ipic_host_map(struct irq_host *h, unsigned int virq,
irq_hw_number_t hw)
{
struct ipic *ipic = h->host_data;
set_irq_chip_data(virq, ipic);
set_irq_chip_and_handler(virq, &ipic_level_irq_chip, handle_level_irq);
/* Set default irq type */
set_irq_type(virq, IRQ_TYPE_NONE);
return 0;
}
static int ipic_host_xlate(struct irq_host *h, struct device_node *ct,
u32 *intspec, unsigned int intsize,
irq_hw_number_t *out_hwirq, unsigned int *out_flags)
{
/* interrupt sense values coming from the device tree equal either
* LEVEL_LOW (low assertion) or EDGE_FALLING (high-to-low change)
*/
*out_hwirq = intspec[0];
if (intsize > 1)
*out_flags = intspec[1];
else
*out_flags = IRQ_TYPE_NONE;
return 0;
}
static struct irq_host_ops ipic_host_ops = {
.match = ipic_host_match,
.map = ipic_host_map,
.xlate = ipic_host_xlate,
};
struct ipic * __init ipic_init(struct device_node *node, unsigned int flags)
{
struct ipic *ipic;
struct resource res;
u32 temp = 0, ret;
ret = of_address_to_resource(node, 0, &res);
if (ret)
return NULL;
ipic = alloc_bootmem(sizeof(struct ipic));
if (ipic == NULL)
return NULL;
memset(ipic, 0, sizeof(struct ipic));
ipic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR,
NR_IPIC_INTS,
&ipic_host_ops, 0);
if (ipic->irqhost == NULL)
return NULL;
ipic->regs = ioremap(res.start, res.end - res.start + 1);
ipic->irqhost->host_data = ipic;
/* init hw */
ipic_write(ipic->regs, IPIC_SICNR, 0x0);
/* default priority scheme is grouped. If spread mode is required
* configure SICFR accordingly */
if (flags & IPIC_SPREADMODE_GRP_A)
temp |= SICFR_IPSA;
if (flags & IPIC_SPREADMODE_GRP_B)
temp |= SICFR_IPSB;
if (flags & IPIC_SPREADMODE_GRP_C)
temp |= SICFR_IPSC;
if (flags & IPIC_SPREADMODE_GRP_D)
temp |= SICFR_IPSD;
if (flags & IPIC_SPREADMODE_MIX_A)
temp |= SICFR_MPSA;
if (flags & IPIC_SPREADMODE_MIX_B)
temp |= SICFR_MPSB;
ipic_write(ipic->regs, IPIC_SICFR, temp);
/* handle MCP route */
temp = 0;
if (flags & IPIC_DISABLE_MCP_OUT)
temp = SERCR_MCPR;
ipic_write(ipic->regs, IPIC_SERCR, temp);
/* handle routing of IRQ0 to MCP */
temp = ipic_read(ipic->regs, IPIC_SEMSR);
if (flags & IPIC_IRQ0_MCP)
temp |= SEMSR_SIRQ0;
else
temp &= ~SEMSR_SIRQ0;
ipic_write(ipic->regs, IPIC_SEMSR, temp);
primary_ipic = ipic;
irq_set_default_host(primary_ipic->irqhost);
printk ("IPIC (%d IRQ sources) at %p\n", NR_IPIC_INTS,
primary_ipic->regs);
return ipic;
}
int ipic_set_priority(unsigned int virq, unsigned int priority)
{
struct ipic *ipic = ipic_from_irq(virq);
unsigned int src = ipic_irq_to_hw(virq);
u32 temp;
if (priority > 7)
return -EINVAL;
if (src > 127)
return -EINVAL;
if (ipic_info[src].prio == 0)
return -EINVAL;
temp = ipic_read(ipic->regs, ipic_info[src].prio);
if (priority < 4) {
temp &= ~(0x7 << (20 + (3 - priority) * 3));
temp |= ipic_info[src].prio_mask << (20 + (3 - priority) * 3);
} else {
temp &= ~(0x7 << (4 + (7 - priority) * 3));
temp |= ipic_info[src].prio_mask << (4 + (7 - priority) * 3);
}
ipic_write(ipic->regs, ipic_info[src].prio, temp);
return 0;
}
void ipic_set_highest_priority(unsigned int virq)
{
struct ipic *ipic = ipic_from_irq(virq);
unsigned int src = ipic_irq_to_hw(virq);
u32 temp;
temp = ipic_read(ipic->regs, IPIC_SICFR);
/* clear and set HPI */
temp &= 0x7f000000;
temp |= (src & 0x7f) << 24;
ipic_write(ipic->regs, IPIC_SICFR, temp);
}
void ipic_set_default_priority(void)
{
ipic_write(primary_ipic->regs, IPIC_SIPRR_A, IPIC_PRIORITY_DEFAULT);
ipic_write(primary_ipic->regs, IPIC_SIPRR_B, IPIC_PRIORITY_DEFAULT);
ipic_write(primary_ipic->regs, IPIC_SIPRR_C, IPIC_PRIORITY_DEFAULT);
ipic_write(primary_ipic->regs, IPIC_SIPRR_D, IPIC_PRIORITY_DEFAULT);
ipic_write(primary_ipic->regs, IPIC_SMPRR_A, IPIC_PRIORITY_DEFAULT);
ipic_write(primary_ipic->regs, IPIC_SMPRR_B, IPIC_PRIORITY_DEFAULT);
}
void ipic_enable_mcp(enum ipic_mcp_irq mcp_irq)
{
struct ipic *ipic = primary_ipic;
u32 temp;
temp = ipic_read(ipic->regs, IPIC_SERMR);
temp |= (1 << (31 - mcp_irq));
ipic_write(ipic->regs, IPIC_SERMR, temp);
}
void ipic_disable_mcp(enum ipic_mcp_irq mcp_irq)
{
struct ipic *ipic = primary_ipic;
u32 temp;
temp = ipic_read(ipic->regs, IPIC_SERMR);
temp &= (1 << (31 - mcp_irq));
ipic_write(ipic->regs, IPIC_SERMR, temp);
}
u32 ipic_get_mcp_status(void)
{
return ipic_read(primary_ipic->regs, IPIC_SERMR);
}
void ipic_clear_mcp_status(u32 mask)
{
ipic_write(primary_ipic->regs, IPIC_SERMR, mask);
}
/* Return an interrupt vector or NO_IRQ if no interrupt is pending. */
unsigned int ipic_get_irq(void)
{
int irq;
BUG_ON(primary_ipic == NULL);
#define IPIC_SIVCR_VECTOR_MASK 0x7f
irq = ipic_read(primary_ipic->regs, IPIC_SIVCR) & IPIC_SIVCR_VECTOR_MASK;
if (irq == 0) /* 0 --> no irq is pending */
return NO_IRQ;
return irq_linear_revmap(primary_ipic->irqhost, irq);
}
#ifdef CONFIG_SUSPEND
static struct {
u32 sicfr;
u32 siprr[2];
u32 simsr[2];
u32 sicnr;
u32 smprr[2];
u32 semsr;
u32 secnr;
u32 sermr;
u32 sercr;
} ipic_saved_state;
static int ipic_suspend(struct sys_device *sdev, pm_message_t state)
{
struct ipic *ipic = primary_ipic;
ipic_saved_state.sicfr = ipic_read(ipic->regs, IPIC_SICFR);
ipic_saved_state.siprr[0] = ipic_read(ipic->regs, IPIC_SIPRR_A);
ipic_saved_state.siprr[1] = ipic_read(ipic->regs, IPIC_SIPRR_D);
ipic_saved_state.simsr[0] = ipic_read(ipic->regs, IPIC_SIMSR_H);
ipic_saved_state.simsr[1] = ipic_read(ipic->regs, IPIC_SIMSR_L);
ipic_saved_state.sicnr = ipic_read(ipic->regs, IPIC_SICNR);
ipic_saved_state.smprr[0] = ipic_read(ipic->regs, IPIC_SMPRR_A);
ipic_saved_state.smprr[1] = ipic_read(ipic->regs, IPIC_SMPRR_B);
ipic_saved_state.semsr = ipic_read(ipic->regs, IPIC_SEMSR);
ipic_saved_state.secnr = ipic_read(ipic->regs, IPIC_SECNR);
ipic_saved_state.sermr = ipic_read(ipic->regs, IPIC_SERMR);
ipic_saved_state.sercr = ipic_read(ipic->regs, IPIC_SERCR);
if (fsl_deep_sleep()) {
/* In deep sleep, make sure there can be no
* pending interrupts, as this can cause
* problems on 831x.
*/
ipic_write(ipic->regs, IPIC_SIMSR_H, 0);
ipic_write(ipic->regs, IPIC_SIMSR_L, 0);
ipic_write(ipic->regs, IPIC_SEMSR, 0);
ipic_write(ipic->regs, IPIC_SERMR, 0);
}
return 0;
}
static int ipic_resume(struct sys_device *sdev)
{
struct ipic *ipic = primary_ipic;
ipic_write(ipic->regs, IPIC_SICFR, ipic_saved_state.sicfr);
ipic_write(ipic->regs, IPIC_SIPRR_A, ipic_saved_state.siprr[0]);
ipic_write(ipic->regs, IPIC_SIPRR_D, ipic_saved_state.siprr[1]);
ipic_write(ipic->regs, IPIC_SIMSR_H, ipic_saved_state.simsr[0]);
ipic_write(ipic->regs, IPIC_SIMSR_L, ipic_saved_state.simsr[1]);
ipic_write(ipic->regs, IPIC_SICNR, ipic_saved_state.sicnr);
ipic_write(ipic->regs, IPIC_SMPRR_A, ipic_saved_state.smprr[0]);
ipic_write(ipic->regs, IPIC_SMPRR_B, ipic_saved_state.smprr[1]);
ipic_write(ipic->regs, IPIC_SEMSR, ipic_saved_state.semsr);
ipic_write(ipic->regs, IPIC_SECNR, ipic_saved_state.secnr);
ipic_write(ipic->regs, IPIC_SERMR, ipic_saved_state.sermr);
ipic_write(ipic->regs, IPIC_SERCR, ipic_saved_state.sercr);
return 0;
}
#else
#define ipic_suspend NULL
#define ipic_resume NULL
#endif
static struct sysdev_class ipic_sysclass = {
.name = "ipic",
.suspend = ipic_suspend,
.resume = ipic_resume,
};
static struct sys_device device_ipic = {
.id = 0,
.cls = &ipic_sysclass,
};
static int __init init_ipic_sysfs(void)
{
int rc;
if (!primary_ipic || !primary_ipic->regs)
return -ENODEV;
printk(KERN_DEBUG "Registering ipic with sysfs...\n");
rc = sysdev_class_register(&ipic_sysclass);
if (rc) {
printk(KERN_ERR "Failed registering ipic sys class\n");
return -ENODEV;
}
rc = sysdev_register(&device_ipic);
if (rc) {
printk(KERN_ERR "Failed registering ipic sys device\n");
return -ENODEV;
}
return 0;
}
subsys_initcall(init_ipic_sysfs);
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