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linux/arch/powerpc/sysdev/ipic.c
Kumar Gala 1cd8e50620 [PATCH] powerpc: moved ipic code to arch/powerpc 
Moved 83xx and QUICC Engine interrupt handling code into arch/powerpc
as a precursor of getting 83xx sub-arch building in arch/powerpc.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09 14:48:57 +11:00

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/*
* include/asm-ppc/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 <asm/irq.h>
#include <asm/io.h>
#include <asm/ipic.h>
#include <asm/mpc83xx.h>
#include "ipic.h"
static struct ipic p_ipic;
static struct ipic * primary_ipic;
static struct ipic_info ipic_info[] = {
[9] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 24,
.prio_mask = 0,
},
[10] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 25,
.prio_mask = 1,
},
[11] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 26,
.prio_mask = 2,
},
[14] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 29,
.prio_mask = 5,
},
[15] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 30,
.prio_mask = 6,
},
[16] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_D,
.force = IPIC_SIFCR_H,
.bit = 31,
.prio_mask = 7,
},
[17] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
.bit = 1,
.prio_mask = 5,
},
[18] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
.bit = 2,
.prio_mask = 6,
},
[19] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
.bit = 3,
.prio_mask = 7,
},
[20] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
.bit = 4,
.prio_mask = 4,
},
[21] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
.bit = 5,
.prio_mask = 5,
},
[22] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
.bit = 6,
.prio_mask = 6,
},
[23] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_B,
.force = IPIC_SEFCR,
.bit = 7,
.prio_mask = 7,
},
[32] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 0,
.prio_mask = 0,
},
[33] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 1,
.prio_mask = 1,
},
[34] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 2,
.prio_mask = 2,
},
[35] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 3,
.prio_mask = 3,
},
[36] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 4,
.prio_mask = 4,
},
[37] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 5,
.prio_mask = 5,
},
[38] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 6,
.prio_mask = 6,
},
[39] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_H,
.prio = IPIC_SIPRR_A,
.force = IPIC_SIFCR_H,
.bit = 7,
.prio_mask = 7,
},
[48] = {
.pend = IPIC_SEPNR,
.mask = IPIC_SEMSR,
.prio = IPIC_SMPRR_A,
.force = IPIC_SEFCR,
.bit = 0,
.prio_mask = 4,
},
[64] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
.bit = 0,
.prio_mask = 0,
},
[65] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
.bit = 1,
.prio_mask = 1,
},
[66] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
.bit = 2,
.prio_mask = 2,
},
[67] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_A,
.force = IPIC_SIFCR_L,
.bit = 3,
.prio_mask = 3,
},
[68] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
.bit = 4,
.prio_mask = 0,
},
[69] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
.bit = 5,
.prio_mask = 1,
},
[70] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
.bit = 6,
.prio_mask = 2,
},
[71] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = IPIC_SMPRR_B,
.force = IPIC_SIFCR_L,
.bit = 7,
.prio_mask = 3,
},
[72] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 8,
},
[73] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 9,
},
[74] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 10,
},
[75] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 11,
},
[76] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 12,
},
[77] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 13,
},
[78] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 14,
},
[79] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 15,
},
[80] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 16,
},
[84] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 20,
},
[85] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 21,
},
[90] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 26,
},
[91] = {
.pend = IPIC_SIPNR_H,
.mask = IPIC_SIMSR_L,
.prio = 0,
.force = IPIC_SIFCR_L,
.bit = 27,
},
};
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 irq)
{
return primary_ipic;
}
static void ipic_enable_irq(unsigned int irq)
{
struct ipic *ipic = ipic_from_irq(irq);
unsigned int src = irq - ipic->irq_offset;
u32 temp;
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);
}
static void ipic_disable_irq(unsigned int irq)
{
struct ipic *ipic = ipic_from_irq(irq);
unsigned int src = irq - ipic->irq_offset;
u32 temp;
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);
}
static void ipic_disable_irq_and_ack(unsigned int irq)
{
struct ipic *ipic = ipic_from_irq(irq);
unsigned int src = irq - ipic->irq_offset;
u32 temp;
ipic_disable_irq(irq);
temp = ipic_read(ipic->regs, ipic_info[src].pend);
temp |= (1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].pend, temp);
}
static void ipic_end_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
ipic_enable_irq(irq);
}
struct hw_interrupt_type ipic = {
.typename = " IPIC ",
.enable = ipic_enable_irq,
.disable = ipic_disable_irq,
.ack = ipic_disable_irq_and_ack,
.end = ipic_end_irq,
};
void __init ipic_init(phys_addr_t phys_addr,
unsigned int flags,
unsigned int irq_offset,
unsigned char *senses,
unsigned int senses_count)
{
u32 i, temp = 0;
primary_ipic = &p_ipic;
primary_ipic->regs = ioremap(phys_addr, MPC83xx_IPIC_SIZE);
primary_ipic->irq_offset = irq_offset;
ipic_write(primary_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_D)
temp |= SICFR_IPSD;
if (flags & IPIC_SPREADMODE_MIX_A)
temp |= SICFR_MPSA;
if (flags & IPIC_SPREADMODE_MIX_B)
temp |= SICFR_MPSB;
ipic_write(primary_ipic->regs, IPIC_SICNR, temp);
/* handle MCP route */
temp = 0;
if (flags & IPIC_DISABLE_MCP_OUT)
temp = SERCR_MCPR;
ipic_write(primary_ipic->regs, IPIC_SERCR, temp);
/* handle routing of IRQ0 to MCP */
temp = ipic_read(primary_ipic->regs, IPIC_SEMSR);
if (flags & IPIC_IRQ0_MCP)
temp |= SEMSR_SIRQ0;
else
temp &= ~SEMSR_SIRQ0;
ipic_write(primary_ipic->regs, IPIC_SEMSR, temp);
for (i = 0 ; i < NR_IPIC_INTS ; i++) {
irq_desc[i+irq_offset].handler = &ipic;
irq_desc[i+irq_offset].status = IRQ_LEVEL;
}
temp = 0;
for (i = 0 ; i < senses_count ; i++) {
if ((senses[i] & IRQ_SENSE_MASK) == IRQ_SENSE_EDGE) {
temp |= 1 << (15 - i);
if (i != 0)
irq_desc[i + irq_offset + MPC83xx_IRQ_EXT1 - 1].status = 0;
else
irq_desc[irq_offset + MPC83xx_IRQ_EXT0].status = 0;
}
}
ipic_write(primary_ipic->regs, IPIC_SECNR, temp);
printk ("IPIC (%d IRQ sources, %d External IRQs) at %p\n", NR_IPIC_INTS,
senses_count, primary_ipic->regs);
}
int ipic_set_priority(unsigned int irq, unsigned int priority)
{
struct ipic *ipic = ipic_from_irq(irq);
unsigned int src = irq - ipic->irq_offset;
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 irq)
{
struct ipic *ipic = ipic_from_irq(irq);
unsigned int src = irq - ipic->irq_offset;
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_set_priority(MPC83xx_IRQ_TSEC1_TX, 0);
ipic_set_priority(MPC83xx_IRQ_TSEC1_RX, 1);
ipic_set_priority(MPC83xx_IRQ_TSEC1_ERROR, 2);
ipic_set_priority(MPC83xx_IRQ_TSEC2_TX, 3);
ipic_set_priority(MPC83xx_IRQ_TSEC2_RX, 4);
ipic_set_priority(MPC83xx_IRQ_TSEC2_ERROR, 5);
ipic_set_priority(MPC83xx_IRQ_USB2_DR, 6);
ipic_set_priority(MPC83xx_IRQ_USB2_MPH, 7);
ipic_set_priority(MPC83xx_IRQ_UART1, 0);
ipic_set_priority(MPC83xx_IRQ_UART2, 1);
ipic_set_priority(MPC83xx_IRQ_SEC2, 2);
ipic_set_priority(MPC83xx_IRQ_IIC1, 5);
ipic_set_priority(MPC83xx_IRQ_IIC2, 6);
ipic_set_priority(MPC83xx_IRQ_SPI, 7);
ipic_set_priority(MPC83xx_IRQ_RTC_SEC, 0);
ipic_set_priority(MPC83xx_IRQ_PIT, 1);
ipic_set_priority(MPC83xx_IRQ_PCI1, 2);
ipic_set_priority(MPC83xx_IRQ_PCI2, 3);
ipic_set_priority(MPC83xx_IRQ_EXT0, 4);
ipic_set_priority(MPC83xx_IRQ_EXT1, 5);
ipic_set_priority(MPC83xx_IRQ_EXT2, 6);
ipic_set_priority(MPC83xx_IRQ_EXT3, 7);
ipic_set_priority(MPC83xx_IRQ_RTC_ALR, 0);
ipic_set_priority(MPC83xx_IRQ_MU, 1);
ipic_set_priority(MPC83xx_IRQ_SBA, 2);
ipic_set_priority(MPC83xx_IRQ_DMA, 3);
ipic_set_priority(MPC83xx_IRQ_EXT4, 4);
ipic_set_priority(MPC83xx_IRQ_EXT5, 5);
ipic_set_priority(MPC83xx_IRQ_EXT6, 6);
ipic_set_priority(MPC83xx_IRQ_EXT7, 7);
}
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 -1 if no interrupt is pending. */
int ipic_get_irq(struct pt_regs *regs)
{
int irq;
irq = ipic_read(primary_ipic->regs, IPIC_SIVCR) & 0x7f;
if (irq == 0) /* 0 --> no irq is pending */
irq = -1;
return irq;
}
static struct sysdev_class ipic_sysclass = {
set_kset_name("ipic"),
};
static struct sys_device device_ipic = {
.id = 0,
.cls = &ipic_sysclass,
};
static int __init init_ipic_sysfs(void)
{
int rc;
if (!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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