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powerpc/mpic: parse 4-cell intspec types other than zero

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Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Scott Wood 2011-03-24 16:43:54 -05:00 committed by Kumar Gala
parent c281739f59
commit 22d168ce60
2 changed files with 38 additions and 1 deletions
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2
arch/powerpc/include/asm/mpic.h
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@ -371,6 +371,8 @@ struct mpic
* NOTE: This flag trumps MPIC_WANTS_RESET.
*/
#define MPIC_NO_RESET 0x00004000
/* Freescale MPIC (compatible includes "fsl,mpic") */
#define MPIC_FSL 0x00008000
/* MPIC HW modification ID */
#define MPIC_REGSET_MASK 0xf0000000

37
arch/powerpc/sysdev/mpic.c
View File

@ -6,6 +6,7 @@
* with various broken implementations of this HW.
*
* Copyright (C) 2004 Benjamin Herrenschmidt, IBM Corp.
* Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
@ -1023,6 +1024,7 @@ static int mpic_host_xlate(struct irq_host *h, struct device_node *ct,
irq_hw_number_t *out_hwirq, unsigned int *out_flags)
{
struct mpic *mpic = h->host_data;
static unsigned char map_mpic_senses[4] = {
IRQ_TYPE_EDGE_RISING,
IRQ_TYPE_LEVEL_LOW,
@ -1031,7 +1033,38 @@ static int mpic_host_xlate(struct irq_host *h, struct device_node *ct,
};
*out_hwirq = intspec[0];
if (intsize > 1) {
if (intsize >= 4 && (mpic->flags & MPIC_FSL)) {
/*
* Freescale MPIC with extended intspec:
* First two cells are as usual. Third specifies
* an "interrupt type". Fourth is type-specific data.
*
* See Documentation/devicetree/bindings/powerpc/fsl/mpic.txt
*/
switch (intspec[2]) {
case 0:
case 1: /* no EISR/EIMR support for now, treat as shared IRQ */
break;
case 2:
if (intspec[0] >= ARRAY_SIZE(mpic->ipi_vecs))
return -EINVAL;
*out_hwirq = mpic->ipi_vecs[intspec[0]];
break;
case 3:
if (intspec[0] >= ARRAY_SIZE(mpic->timer_vecs))
return -EINVAL;
*out_hwirq = mpic->timer_vecs[intspec[0]];
break;
default:
pr_debug("%s: unknown irq type %u\n",
__func__, intspec[2]);
return -EINVAL;
}
*out_flags = map_mpic_senses[intspec[1] & 3];
} else if (intsize > 1) {
u32 mask = 0x3;
/* Apple invented a new race of encoding on machines with
@ -1130,6 +1163,8 @@ struct mpic * __init mpic_alloc(struct device_node *node,
/* Check for "big-endian" in device-tree */
if (node && of_get_property(node, "big-endian", NULL) != NULL)
mpic->flags |= MPIC_BIG_ENDIAN;
if (node && of_device_is_compatible(node, "fsl,mpic"))
mpic->flags |= MPIC_FSL;
/* Look for protected sources */
if (node) {