AuxXxilium/linux_dsm_epyc7002
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IXP42x: Add QMgr support for IXP425 rev. A0 processors.

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Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
Krzysztof Hałasa 2009-05-23 23:36:03 +02:00
parent 61a5ccc85a
commit d4c9e9fc97
1 changed files with 59 additions and 8 deletions
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67
arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
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@ -49,6 +49,49 @@ void qmgr_set_irq(unsigned int queue, int src,
}
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 @@ void qmgr_release_queue(unsigned int queue)
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 @@ static int qmgr_init(void)
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;
}