[Patch v5 06/12] powerpc/virtex: Use generic xilinx irqchip driver
From: Zubair Lutfullah Kakakhel
Date: Mon Oct 17 2016 - 12:54:34 EST
The Xilinx interrupt controller driver is now available in drivers/irqchip.
Switch to using that driver.
Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@xxxxxxxxxx>
---
V5 New patch
Tested on virtex440-ml507 using qemu
---
arch/powerpc/include/asm/xilinx_intc.h | 2 +-
arch/powerpc/platforms/40x/Kconfig | 1 +
arch/powerpc/platforms/40x/virtex.c | 2 +-
arch/powerpc/platforms/44x/Kconfig | 1 +
arch/powerpc/platforms/44x/virtex.c | 2 +-
arch/powerpc/sysdev/xilinx_intc.c | 211 +--------------------------------
drivers/irqchip/irq-xilinx-intc.c | 3 +-
7 files changed, 9 insertions(+), 213 deletions(-)
diff --git a/arch/powerpc/include/asm/xilinx_intc.h b/arch/powerpc/include/asm/xilinx_intc.h
index 343612f..3192d7f 100644
--- a/arch/powerpc/include/asm/xilinx_intc.h
+++ b/arch/powerpc/include/asm/xilinx_intc.h
@@ -14,7 +14,7 @@
#ifdef __KERNEL__
extern void __init xilinx_intc_init_tree(void);
-extern unsigned int xilinx_intc_get_irq(void);
+extern unsigned int xintc_get_irq(void);
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_XILINX_INTC_H */
diff --git a/arch/powerpc/platforms/40x/Kconfig b/arch/powerpc/platforms/40x/Kconfig
index e3257f2..1d7c1b1 100644
--- a/arch/powerpc/platforms/40x/Kconfig
+++ b/arch/powerpc/platforms/40x/Kconfig
@@ -64,6 +64,7 @@ config XILINX_VIRTEX_GENERIC_BOARD
default n
select XILINX_VIRTEX_II_PRO
select XILINX_VIRTEX_4_FX
+ select XILINX_INTC
help
This option enables generic support for Xilinx Virtex based boards.
diff --git a/arch/powerpc/platforms/40x/virtex.c b/arch/powerpc/platforms/40x/virtex.c
index 91a08ea..e3d5e09 100644
--- a/arch/powerpc/platforms/40x/virtex.c
+++ b/arch/powerpc/platforms/40x/virtex.c
@@ -48,7 +48,7 @@ static int __init virtex_probe(void)
.probe = virtex_probe,
.setup_arch = xilinx_pci_init,
.init_IRQ = xilinx_intc_init_tree,
- .get_irq = xilinx_intc_get_irq,
+ .get_irq = xintc_get_irq,
.restart = ppc4xx_reset_system,
.calibrate_decr = generic_calibrate_decr,
};
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index 48fc180..25b8d64 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -241,6 +241,7 @@ config XILINX_VIRTEX440_GENERIC_BOARD
depends on 44x
default n
select XILINX_VIRTEX_5_FXT
+ select XILINX_INTC
help
This option enables generic support for Xilinx Virtex based boards
that use a 440 based processor in the Virtex 5 FXT FPGA architecture.
diff --git a/arch/powerpc/platforms/44x/virtex.c b/arch/powerpc/platforms/44x/virtex.c
index a7e0802..3eb13ed 100644
--- a/arch/powerpc/platforms/44x/virtex.c
+++ b/arch/powerpc/platforms/44x/virtex.c
@@ -54,7 +54,7 @@ static int __init virtex_probe(void)
.probe = virtex_probe,
.setup_arch = xilinx_pci_init,
.init_IRQ = xilinx_intc_init_tree,
- .get_irq = xilinx_intc_get_irq,
+ .get_irq = xintc_get_irq,
.calibrate_decr = generic_calibrate_decr,
.restart = ppc4xx_reset_system,
};
diff --git a/arch/powerpc/sysdev/xilinx_intc.c b/arch/powerpc/sysdev/xilinx_intc.c
index 0f52d79..4a86dcf 100644
--- a/arch/powerpc/sysdev/xilinx_intc.c
+++ b/arch/powerpc/sysdev/xilinx_intc.c
@@ -29,194 +29,7 @@
#include <asm/processor.h>
#include <asm/i8259.h>
#include <asm/irq.h>
-
-/*
- * INTC Registers
- */
-#define XINTC_ISR 0 /* Interrupt Status */
-#define XINTC_IPR 4 /* Interrupt Pending */
-#define XINTC_IER 8 /* Interrupt Enable */
-#define XINTC_IAR 12 /* Interrupt Acknowledge */
-#define XINTC_SIE 16 /* Set Interrupt Enable bits */
-#define XINTC_CIE 20 /* Clear Interrupt Enable bits */
-#define XINTC_IVR 24 /* Interrupt Vector */
-#define XINTC_MER 28 /* Master Enable */
-
-static struct irq_domain *master_irqhost;
-
-#define XILINX_INTC_MAXIRQS (32)
-
-/* The following table allows the interrupt type, edge or level,
- * to be cached after being read from the device tree until the interrupt
- * is mapped
- */
-static int xilinx_intc_typetable[XILINX_INTC_MAXIRQS];
-
-/* Map the interrupt type from the device tree to the interrupt types
- * used by the interrupt subsystem
- */
-static unsigned char xilinx_intc_map_senses[] = {
- IRQ_TYPE_EDGE_RISING,
- IRQ_TYPE_EDGE_FALLING,
- IRQ_TYPE_LEVEL_HIGH,
- IRQ_TYPE_LEVEL_LOW,
-};
-
-/*
- * The interrupt controller is setup such that it doesn't work well with
- * the level interrupt handler in the kernel because the handler acks the
- * interrupt before calling the application interrupt handler. To deal with
- * that, we use 2 different irq chips so that different functions can be
- * used for level and edge type interrupts.
- *
- * IRQ Chip common (across level and edge) operations
- */
-static void xilinx_intc_mask(struct irq_data *d)
-{
- int irq = irqd_to_hwirq(d);
- void * regs = irq_data_get_irq_chip_data(d);
- pr_debug("mask: %d\n", irq);
- out_be32(regs + XINTC_CIE, 1 << irq);
-}
-
-static int xilinx_intc_set_type(struct irq_data *d, unsigned int flow_type)
-{
- return 0;
-}
-
-/*
- * IRQ Chip level operations
- */
-static void xilinx_intc_level_unmask(struct irq_data *d)
-{
- int irq = irqd_to_hwirq(d);
- void * regs = irq_data_get_irq_chip_data(d);
- pr_debug("unmask: %d\n", irq);
- out_be32(regs + XINTC_SIE, 1 << irq);
-
- /* ack level irqs because they can't be acked during
- * ack function since the handle_level_irq function
- * acks the irq before calling the inerrupt handler
- */
- out_be32(regs + XINTC_IAR, 1 << irq);
-}
-
-static struct irq_chip xilinx_intc_level_irqchip = {
- .name = "Xilinx Level INTC",
- .irq_mask = xilinx_intc_mask,
- .irq_mask_ack = xilinx_intc_mask,
- .irq_unmask = xilinx_intc_level_unmask,
- .irq_set_type = xilinx_intc_set_type,
-};
-
-/*
- * IRQ Chip edge operations
- */
-static void xilinx_intc_edge_unmask(struct irq_data *d)
-{
- int irq = irqd_to_hwirq(d);
- void *regs = irq_data_get_irq_chip_data(d);
- pr_debug("unmask: %d\n", irq);
- out_be32(regs + XINTC_SIE, 1 << irq);
-}
-
-static void xilinx_intc_edge_ack(struct irq_data *d)
-{
- int irq = irqd_to_hwirq(d);
- void * regs = irq_data_get_irq_chip_data(d);
- pr_debug("ack: %d\n", irq);
- out_be32(regs + XINTC_IAR, 1 << irq);
-}
-
-static struct irq_chip xilinx_intc_edge_irqchip = {
- .name = "Xilinx Edge INTC",
- .irq_mask = xilinx_intc_mask,
- .irq_unmask = xilinx_intc_edge_unmask,
- .irq_ack = xilinx_intc_edge_ack,
- .irq_set_type = xilinx_intc_set_type,
-};
-
-/*
- * IRQ Host operations
- */
-
-/**
- * xilinx_intc_xlate - translate virq# from device tree interrupts property
- */
-static int xilinx_intc_xlate(struct irq_domain *h, struct device_node *ct,
- const u32 *intspec, unsigned int intsize,
- irq_hw_number_t *out_hwirq,
- unsigned int *out_flags)
-{
- if ((intsize < 2) || (intspec[0] >= XILINX_INTC_MAXIRQS))
- return -EINVAL;
-
- /* keep a copy of the interrupt type til the interrupt is mapped
- */
- xilinx_intc_typetable[intspec[0]] = xilinx_intc_map_senses[intspec[1]];
-
- /* Xilinx uses 2 interrupt entries, the 1st being the h/w
- * interrupt number, the 2nd being the interrupt type, edge or level
- */
- *out_hwirq = intspec[0];
- *out_flags = xilinx_intc_map_senses[intspec[1]];
-
- return 0;
-}
-static int xilinx_intc_map(struct irq_domain *h, unsigned int virq,
- irq_hw_number_t irq)
-{
- irq_set_chip_data(virq, h->host_data);
-
- if (xilinx_intc_typetable[irq] == IRQ_TYPE_LEVEL_HIGH ||
- xilinx_intc_typetable[irq] == IRQ_TYPE_LEVEL_LOW) {
- irq_set_chip_and_handler(virq, &xilinx_intc_level_irqchip,
- handle_level_irq);
- } else {
- irq_set_chip_and_handler(virq, &xilinx_intc_edge_irqchip,
- handle_edge_irq);
- }
- return 0;
-}
-
-static const struct irq_domain_ops xilinx_intc_ops = {
- .map = xilinx_intc_map,
- .xlate = xilinx_intc_xlate,
-};
-
-struct irq_domain * __init
-xilinx_intc_init(struct device_node *np)
-{
- struct irq_domain * irq;
- void * regs;
-
- /* Find and map the intc registers */
- regs = of_iomap(np, 0);
- if (!regs) {
- pr_err("xilinx_intc: could not map registers\n");
- return NULL;
- }
-
- /* Setup interrupt controller */
- out_be32(regs + XINTC_IER, 0); /* disable all irqs */
- out_be32(regs + XINTC_IAR, ~(u32) 0); /* Acknowledge pending irqs */
- out_be32(regs + XINTC_MER, 0x3UL); /* Turn on the Master Enable. */
-
- /* Allocate and initialize an irq_domain structure. */
- irq = irq_domain_add_linear(np, XILINX_INTC_MAXIRQS, &xilinx_intc_ops,
- regs);
- if (!irq)
- panic(__FILE__ ": Cannot allocate IRQ host\n");
-
- return irq;
-}
-
-int xilinx_intc_get_irq(void)
-{
- void * regs = master_irqhost->host_data;
- pr_debug("get_irq:\n");
- return irq_linear_revmap(master_irqhost, in_be32(regs + XINTC_IVR));
-}
+#include <linux/irqchip.h>
#if defined(CONFIG_PPC_I8259)
/*
@@ -265,31 +78,11 @@ static void __init xilinx_i8259_setup_cascade(void)
static inline void xilinx_i8259_setup_cascade(void) { return; }
#endif /* defined(CONFIG_PPC_I8259) */
-static const struct of_device_id xilinx_intc_match[] __initconst = {
- { .compatible = "xlnx,opb-intc-1.00.c", },
- { .compatible = "xlnx,xps-intc-1.00.a", },
- {}
-};
-
/*
* Initialize master Xilinx interrupt controller
*/
void __init xilinx_intc_init_tree(void)
{
- struct device_node *np;
-
- /* find top level interrupt controller */
- for_each_matching_node(np, xilinx_intc_match) {
- if (!of_get_property(np, "interrupts", NULL))
- break;
- }
- BUG_ON(!np);
-
- master_irqhost = xilinx_intc_init(np);
- BUG_ON(!master_irqhost);
-
- irq_set_default_host(master_irqhost);
- of_node_put(np);
-
+ irqchip_init();
xilinx_i8259_setup_cascade();
}
diff --git a/drivers/irqchip/irq-xilinx-intc.c b/drivers/irqchip/irq-xilinx-intc.c
index 485fb11..dd372d7 100644
--- a/drivers/irqchip/irq-xilinx-intc.c
+++ b/drivers/irqchip/irq-xilinx-intc.c
@@ -254,4 +254,5 @@ static int __init xilinx_intc_of_init(struct device_node *intc,
}
-IRQCHIP_DECLARE(xilinx_intc, "xlnx,xps-intc-1.00.a", xilinx_intc_of_init);
+IRQCHIP_DECLARE(xilinx_intc_xps, "xlnx,xps-intc-1.00.a", xilinx_intc_of_init);
+IRQCHIP_DECLARE(xilinx_intc_opb, "xlnx,opb-intc-1.00.c", xilinx_intc_of_init);
--
1.9.1