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[ARM] 3086/1: ixp2xxx error irq handling

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Patch from Dave Jiang

This provides support for IXP2xxx error interrupt handling. Previously there was a patch to remove this (although the original stuff was broken). Well, now the error bits are needed again. These are used extensively by the micro-engine drivers according to Deepak and also we will need it for the new EDAC code that Alan Cox is trying to push into the main kernel.

Re-submit of 3072/1, generated against git tree pulled today. AFAICT, this git tree pulled in all the ARM changes that's in arm.diff. Please let me know if there are additional changes. Thx!

Signed-off-by: Dave Jiang <djiang@mvista.com>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Dave Jiang 2005-11-04 17:15:44 +00:00 committed by Russell King
parent 73f0f7c79b
commit 7866f64928
2 changed files with 80 additions and 1 deletions
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46
arch/arm/mach-ixp2000/core.c
View File

@ -402,6 +402,40 @@ static void ixp2000_pci_irq_unmask(unsigned int irq)
ixp2000_reg_write(IXP2000_PCI_XSCALE_INT_ENABLE, (temp | (1 << 27)));
}
/*
* Error interrupts. These are used extensively by the microengine drivers
*/
static void ixp2000_err_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
{
int i;
unsigned long status = *IXP2000_IRQ_ERR_STATUS;
for(i = 31; i >= 0; i--) {
if(status & (1 << i)) {
desc = irq_desc + IRQ_IXP2000_DRAM0_MIN_ERR + i;
desc->handle(IRQ_IXP2000_DRAM0_MIN_ERR + i, desc, regs);
}
}
}
static void ixp2000_err_irq_mask(unsigned int irq)
{
ixp2000_reg_write(IXP2000_IRQ_ERR_ENABLE_CLR,
(1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)));
}
static void ixp2000_err_irq_unmask(unsigned int irq)
{
ixp2000_reg_write(IXP2000_IRQ_ERR_ENABLE_SET,
(1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)));
}
static struct irqchip ixp2000_err_irq_chip = {
.ack = ixp2000_err_irq_mask,
.mask = ixp2000_err_irq_mask,
.unmask = ixp2000_err_irq_unmask
};
static struct irqchip ixp2000_pci_irq_chip = {
.ack = ixp2000_pci_irq_mask,
.mask = ixp2000_pci_irq_mask,
@ -459,6 +493,18 @@ void __init ixp2000_init_irq(void)
} else set_irq_flags(irq, 0);
}
for (irq = IRQ_IXP2000_DRAM0_MIN_ERR; irq <= IRQ_IXP2000_SP_INT; irq++) {
if((1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR)) &
IXP2000_VALID_ERR_IRQ_MASK) {
set_irq_chip(irq, &ixp2000_err_irq_chip);
set_irq_handler(irq, do_level_IRQ);
set_irq_flags(irq, IRQF_VALID);
}
else
set_irq_flags(irq, 0);
}
set_irq_chained_handler(IRQ_IXP2000_ERRSUM, ixp2000_err_irq_handler);
/*
* GPIO IRQs are invalid until someone sets the interrupt mode
* by calling set_irq_type().

35
include/asm-arm/arch-ixp2000/irqs.h
View File

@ -67,12 +67,45 @@
#define IRQ_IXP2000_PCIA 40
#define IRQ_IXP2000_PCIB 41
#define NR_IXP2000_IRQS 42
/* Int sources from IRQ_ERROR_STATUS */
#define IRQ_IXP2000_DRAM0_MIN_ERR 42
#define IRQ_IXP2000_DRAM0_MAJ_ERR 43
#define IRQ_IXP2000_DRAM1_MIN_ERR 44
#define IRQ_IXP2000_DRAM1_MAJ_ERR 45
#define IRQ_IXP2000_DRAM2_MIN_ERR 46
#define IRQ_IXP2000_DRAM2_MAJ_ERR 47
/* 48-57 reserved */
#define IRQ_IXP2000_SRAM0_ERR 58
#define IRQ_IXP2000_SRAM1_ERR 59
#define IRQ_IXP2000_SRAM2_ERR 60
#define IRQ_IXP2000_SRAM3_ERR 61
/* 62-65 reserved */
#define IRQ_IXP2000_MEDIA_ERR 66
#define IRQ_IXP2000_PCI_ERR 67
#define IRQ_IXP2000_SP_INT 68
#define NR_IXP2000_IRQS 69
#define IXP2000_BOARD_IRQ(x) (NR_IXP2000_IRQS + (x))
#define IXP2000_BOARD_IRQ_MASK(irq) (1 << (irq - NR_IXP2000_IRQS))
#define IXP2000_ERR_IRQ_MASK(irq) ( 1 << (irq - IRQ_IXP2000_DRAM0_MIN_ERR))
#define IXP2000_VALID_ERR_IRQ_MASK (\
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_DRAM0_MIN_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_DRAM0_MAJ_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_DRAM1_MIN_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_DRAM1_MAJ_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_DRAM2_MIN_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_DRAM2_MAJ_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_SRAM0_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_SRAM1_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_SRAM2_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_SRAM3_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_MEDIA_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_PCI_ERR) | \
IXP2000_ERR_IRQ_MASK(IRQ_IXP2000_SP_INT) )
/*
* This allows for all the on-chip sources plus up to 32 CPLD based
* IRQs. Should be more than enough.