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Diffstat (limited to 'arch/powerpc/sysdev/cpm2_pic.c')
-rw-r--r--arch/powerpc/sysdev/cpm2_pic.c150
1 files changed, 89 insertions, 61 deletions
diff --git a/arch/powerpc/sysdev/cpm2_pic.c b/arch/powerpc/sysdev/cpm2_pic.c
index e2739eb93cd..eabfe06fe05 100644
--- a/arch/powerpc/sysdev/cpm2_pic.c
+++ b/arch/powerpc/sysdev/cpm2_pic.c
@@ -36,9 +36,20 @@
#include <asm/mpc8260.h>
#include <asm/io.h>
#include <asm/prom.h>
+#include <asm/fs_pd.h>
#include "cpm2_pic.h"
+/* External IRQS */
+#define CPM2_IRQ_EXT1 19
+#define CPM2_IRQ_EXT7 25
+
+/* Port C IRQS */
+#define CPM2_IRQ_PORTC15 48
+#define CPM2_IRQ_PORTC0 63
+
+static intctl_cpm2_t *cpm2_intctl;
+
static struct device_node *cpm2_pic_node;
static struct irq_host *cpm2_pic_host;
#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
@@ -68,68 +79,55 @@ static const u_char irq_to_siubit[] = {
24, 25, 26, 27, 28, 29, 30, 31,
};
-static void cpm2_mask_irq(unsigned int irq_nr)
+static void cpm2_mask_irq(unsigned int virq)
{
int bit, word;
- volatile uint *simr;
-
- irq_nr -= CPM_IRQ_OFFSET;
+ unsigned int irq_nr = virq_to_hw(virq);
bit = irq_to_siubit[irq_nr];
word = irq_to_siureg[irq_nr];
- simr = &(cpm2_intctl->ic_simrh);
ppc_cached_irq_mask[word] &= ~(1 << bit);
- simr[word] = ppc_cached_irq_mask[word];
+ out_be32(&cpm2_intctl->ic_simrh + word, ppc_cached_irq_mask[word]);
}
-static void cpm2_unmask_irq(unsigned int irq_nr)
+static void cpm2_unmask_irq(unsigned int virq)
{
int bit, word;
- volatile uint *simr;
-
- irq_nr -= CPM_IRQ_OFFSET;
+ unsigned int irq_nr = virq_to_hw(virq);
bit = irq_to_siubit[irq_nr];
word = irq_to_siureg[irq_nr];
- simr = &(cpm2_intctl->ic_simrh);
ppc_cached_irq_mask[word] |= 1 << bit;
- simr[word] = ppc_cached_irq_mask[word];
+ out_be32(&cpm2_intctl->ic_simrh + word, ppc_cached_irq_mask[word]);
}
-static void cpm2_mask_and_ack(unsigned int irq_nr)
+static void cpm2_ack(unsigned int virq)
{
int bit, word;
- volatile uint *simr, *sipnr;
-
- irq_nr -= CPM_IRQ_OFFSET;
+ unsigned int irq_nr = virq_to_hw(virq);
bit = irq_to_siubit[irq_nr];
word = irq_to_siureg[irq_nr];
- simr = &(cpm2_intctl->ic_simrh);
- sipnr = &(cpm2_intctl->ic_sipnrh);
- ppc_cached_irq_mask[word] &= ~(1 << bit);
- simr[word] = ppc_cached_irq_mask[word];
- sipnr[word] = 1 << bit;
+ out_be32(&cpm2_intctl->ic_sipnrh + word, 1 << bit);
}
-static void cpm2_end_irq(unsigned int irq_nr)
+static void cpm2_end_irq(unsigned int virq)
{
int bit, word;
- volatile uint *simr;
+ unsigned int irq_nr = virq_to_hw(virq);
if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))
&& irq_desc[irq_nr].action) {
- irq_nr -= CPM_IRQ_OFFSET;
bit = irq_to_siubit[irq_nr];
word = irq_to_siureg[irq_nr];
- simr = &(cpm2_intctl->ic_simrh);
ppc_cached_irq_mask[word] |= 1 << bit;
- simr[word] = ppc_cached_irq_mask[word];
+ out_be32(&cpm2_intctl->ic_simrh + word, ppc_cached_irq_mask[word]);
+
/*
* Work around large numbers of spurious IRQs on PowerPC 82xx
* systems.
@@ -138,13 +136,59 @@ static void cpm2_end_irq(unsigned int irq_nr)
}
}
+static int cpm2_set_irq_type(unsigned int virq, unsigned int flow_type)
+{
+ unsigned int src = virq_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;
+
+ if (flow_type & IRQ_TYPE_EDGE_RISING) {
+ printk(KERN_ERR "CPM2 PIC: sense type 0x%x not supported\n",
+ flow_type);
+ 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;
+ } else
+ desc->handle_irq = handle_edge_irq;
+
+ /* internal IRQ senses are LEVEL_LOW
+ * EXT IRQ and Port C IRQ senses are programmable
+ */
+ if (src >= CPM2_IRQ_EXT1 && src <= CPM2_IRQ_EXT7)
+ edibit = (14 - (src - CPM2_IRQ_EXT1));
+ else
+ if (src >= CPM2_IRQ_PORTC15 && src <= CPM2_IRQ_PORTC0)
+ edibit = (31 - (src - CPM2_IRQ_PORTC15));
+ else
+ return (flow_type & IRQ_TYPE_LEVEL_LOW) ? 0 : -EINVAL;
+
+ vold = in_be32(&cpm2_intctl->ic_siexr);
+
+ if ((flow_type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_FALLING)
+ vnew = vold | (1 << edibit);
+ else
+ vnew = vold & ~(1 << edibit);
+
+ if (vold != vnew)
+ out_be32(&cpm2_intctl->ic_siexr, vnew);
+ return 0;
+}
+
static struct irq_chip cpm2_pic = {
.typename = " CPM2 SIU ",
- .enable = cpm2_unmask_irq,
- .disable = cpm2_mask_irq,
+ .mask = cpm2_mask_irq,
.unmask = cpm2_unmask_irq,
- .mask_ack = cpm2_mask_and_ack,
- .end = cpm2_end_irq,
+ .ack = cpm2_ack,
+ .eoi = cpm2_end_irq,
+ .set_type = cpm2_set_irq_type,
};
unsigned int cpm2_get_irq(void)
@@ -154,17 +198,17 @@ unsigned int cpm2_get_irq(void)
/* For CPM2, read the SIVEC register and shift the bits down
* to get the irq number. */
- bits = cpm2_intctl->ic_sivec;
+ bits = in_be32(&cpm2_intctl->ic_sivec);
irq = bits >> 26;
if (irq == 0)
return(-1);
- return irq+CPM_IRQ_OFFSET;
+ return irq_linear_revmap(cpm2_pic_host, irq);
}
static int cpm2_pic_host_match(struct irq_host *h, struct device_node *node)
{
- return cpm2_pic_node == NULL || cpm2_pic_node == node;
+ return cpm2_pic_node == node;
}
static int cpm2_pic_host_map(struct irq_host *h, unsigned int virq,
@@ -177,39 +221,21 @@ static int cpm2_pic_host_map(struct irq_host *h, unsigned int virq,
return 0;
}
-static void cpm2_host_unmap(struct irq_host *h, unsigned int virq)
-{
- /* Make sure irq is masked in hardware */
- cpm2_mask_irq(virq);
-
- /* remove chip and handler */
- set_irq_chip_and_handler(virq, NULL, NULL);
-}
-
static int cpm2_pic_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)
{
- static const unsigned char map_cpm2_senses[4] = {
- IRQ_TYPE_LEVEL_LOW,
- IRQ_TYPE_LEVEL_HIGH,
- IRQ_TYPE_EDGE_FALLING,
- IRQ_TYPE_EDGE_RISING,
- };
-
*out_hwirq = intspec[0];
- if (intsize > 1 && intspec[1] < 4)
- *out_flags = map_cpm2_senses[intspec[1]];
+ if (intsize > 1)
+ *out_flags = intspec[1];
else
*out_flags = IRQ_TYPE_NONE;
-
return 0;
}
static struct irq_host_ops cpm2_pic_host_ops = {
.match = cpm2_pic_host_match,
.map = cpm2_pic_host_map,
- .unmap = cpm2_host_unmap,
.xlate = cpm2_pic_host_xlate,
};
@@ -217,32 +243,34 @@ void cpm2_pic_init(struct device_node *node)
{
int i;
+ cpm2_intctl = cpm2_map(im_intctl);
+
/* Clear the CPM IRQ controller, in case it has any bits set
* from the bootloader
*/
/* Mask out everything */
- cpm2_intctl->ic_simrh = 0x00000000;
- cpm2_intctl->ic_simrl = 0x00000000;
+ out_be32(&cpm2_intctl->ic_simrh, 0x00000000);
+ out_be32(&cpm2_intctl->ic_simrl, 0x00000000);
wmb();
/* Ack everything */
- cpm2_intctl->ic_sipnrh = 0xffffffff;
- cpm2_intctl->ic_sipnrl = 0xffffffff;
+ out_be32(&cpm2_intctl->ic_sipnrh, 0xffffffff);
+ out_be32(&cpm2_intctl->ic_sipnrl, 0xffffffff);
wmb();
/* Dummy read of the vector */
- i = cpm2_intctl->ic_sivec;
+ i = in_be32(&cpm2_intctl->ic_sivec);
rmb();
/* Initialize the default interrupt mapping priorities,
* in case the boot rom changed something on us.
*/
- cpm2_intctl->ic_sicr = 0;
- cpm2_intctl->ic_scprrh = 0x05309770;
- cpm2_intctl->ic_scprrl = 0x05309770;
+ out_be16(&cpm2_intctl->ic_sicr, 0);
+ out_be32(&cpm2_intctl->ic_scprrh, 0x05309770);
+ out_be32(&cpm2_intctl->ic_scprrl, 0x05309770);
/* create a legacy host */
cpm2_pic_node = of_node_get(node);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-30 09:40:57 +0000