IXP42x: Add QMgr support for IXP425 rev. A0 processors.
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
index 7531bfd..6e6dc4c 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
@@ -49,6 +49,49 @@
}
+static irqreturn_t qmgr_irq1_a0(int irq, void *pdev)
+{
+ int i, ret = 0;
+
+ /* ACK - it may clear any bits so don't rely on it */
+ __raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[0]);
+
+ for (i = 0; i < HALF_QUEUES; i++) {
+ u32 src, stat;
+ if (!(qmgr_regs->irqen[0] & BIT(i)))
+ continue;
+ src = qmgr_regs->irqsrc[i >> 3];
+ stat = qmgr_regs->stat1[i >> 3];
+ if (src & 4) /* the IRQ condition is inverted */
+ stat = ~stat;
+ if (stat & BIT(src & 3)) {
+ irq_handlers[i](irq_pdevs[i]);
+ ret = IRQ_HANDLED;
+ }
+ }
+ return ret;
+}
+
+
+static irqreturn_t qmgr_irq2_a0(int irq, void *pdev)
+{
+ int i, ret = 0;
+ u32 req_bitmap;
+
+ /* ACK - it may clear any bits so don't rely on it */
+ __raw_writel(0xFFFFFFFF, &qmgr_regs->irqstat[1]);
+
+ req_bitmap = qmgr_regs->irqen[1] & qmgr_regs->statne_h;
+ for (i = 0; i < HALF_QUEUES; i++) {
+ if (!(req_bitmap & BIT(i)))
+ continue;
+ irq_handlers[HALF_QUEUES + i](irq_pdevs[HALF_QUEUES + i]);
+ ret = IRQ_HANDLED;
+ }
+ return ret;
+}
+
+
static irqreturn_t qmgr_irq(int irq, void *pdev)
{
int i, half = (irq == IRQ_IXP4XX_QM1 ? 0 : 1);
@@ -236,6 +279,8 @@
static int qmgr_init(void)
{
int i, err;
+ irq_handler_t handler1, handler2;
+
mem_res = request_mem_region(IXP4XX_QMGR_BASE_PHYS,
IXP4XX_QMGR_REGION_SIZE,
"IXP4xx Queue Manager");
@@ -265,19 +310,25 @@
for (i = 0; i < QUEUES; i++)
__raw_writel(0, &qmgr_regs->sram[i]);
- err = request_irq(IRQ_IXP4XX_QM1, qmgr_irq, 0,
- "IXP4xx Queue Manager", NULL);
+ if (cpu_is_ixp42x_rev_a0()) {
+ handler1 = qmgr_irq1_a0;
+ handler2 = qmgr_irq2_a0;
+ } else
+ handler1 = handler2 = qmgr_irq;
+
+ err = request_irq(IRQ_IXP4XX_QM1, handler1, 0, "IXP4xx Queue Manager",
+ NULL);
if (err) {
- printk(KERN_ERR "qmgr: failed to request IRQ%i\n",
- IRQ_IXP4XX_QM1);
+ printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
+ IRQ_IXP4XX_QM1, err);
goto error_irq;
}
- err = request_irq(IRQ_IXP4XX_QM2, qmgr_irq, 0,
- "IXP4xx Queue Manager", NULL);
+ err = request_irq(IRQ_IXP4XX_QM2, handler2, 0, "IXP4xx Queue Manager",
+ NULL);
if (err) {
- printk(KERN_ERR "qmgr: failed to request IRQ%i\n",
- IRQ_IXP4XX_QM2);
+ printk(KERN_ERR "qmgr: failed to request IRQ%i (%i)\n",
+ IRQ_IXP4XX_QM2, err);
goto error_irq2;
}