powerpc: Move GE PIC drivers

Move the GE PIC drivers to allow these to be used by non-86xx boards.

Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

7 files changed, 3 insertions, 271 deletions

diff --git a/arch/powerpc/platforms/86xx/Kconfig b/arch/powerpc/platforms/86xx/Kconfig
index abe2c4fff81..7a6279e3821 100644
--- a/arch/powerpc/platforms/86xx/Kconfig
+++ b/arch/powerpc/platforms/86xx/Kconfig
@@ -64,10 +64,6 @@ config GEF_SBC610
 	help
 	  This option enables support for the GE SBC610.
 
-config GE_FPGA
-	bool
-	default n
-
 endif
 
 config MPC8641
diff --git a/arch/powerpc/platforms/86xx/Makefile b/arch/powerpc/platforms/86xx/Makefile
index 1ee6ca8e53f..ede815d6489 100644
--- a/arch/powerpc/platforms/86xx/Makefile
+++ b/arch/powerpc/platforms/86xx/Makefile
@@ -7,7 +7,6 @@ obj-$(CONFIG_SMP)		+= mpc86xx_smp.o
 obj-$(CONFIG_MPC8641_HPCN)	+= mpc86xx_hpcn.o
 obj-$(CONFIG_SBC8641D)		+= sbc8641d.o
 obj-$(CONFIG_MPC8610_HPCD)	+= mpc8610_hpcd.o
-obj-$(CONFIG_GE_FPGA)		+= gef_pic.o
 obj-$(CONFIG_GEF_SBC610)	+= gef_sbc610.o
 obj-$(CONFIG_GEF_SBC310)	+= gef_sbc310.o
 obj-$(CONFIG_GEF_PPC9A)		+= gef_ppc9a.o
diff --git a/arch/powerpc/platforms/86xx/gef_pic.c b/arch/powerpc/platforms/86xx/gef_pic.c
deleted file mode 100644
index 94594e58594..00000000000
--- a/arch/powerpc/platforms/86xx/gef_pic.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/*
- * Interrupt handling for GE FPGA based PIC
- *
- * Author: Martyn Welch <martyn.welch@ge.com>
- *
- * 2008 (c) GE Intelligent Platforms Embedded Systems, Inc.
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2.  This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- */
-
-#include <linux/stddef.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-
-#include <asm/byteorder.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/irq.h>
-
-#include "gef_pic.h"
-
-#define DEBUG
-#undef DEBUG
-
-#ifdef DEBUG
-#define DBG(fmt...) do { printk(KERN_DEBUG "gef_pic: " fmt); } while (0)
-#else
-#define DBG(fmt...) do { } while (0)
-#endif
-
-#define GEF_PIC_NUM_IRQS	32
-
-/* Interrupt Controller Interface Registers */
-#define GEF_PIC_INTR_STATUS	0x0000
-
-#define GEF_PIC_INTR_MASK(cpu)	(0x0010 + (0x4 * cpu))
-#define GEF_PIC_CPU0_INTR_MASK	GEF_PIC_INTR_MASK(0)
-#define GEF_PIC_CPU1_INTR_MASK	GEF_PIC_INTR_MASK(1)
-
-#define GEF_PIC_MCP_MASK(cpu)	(0x0018 + (0x4 * cpu))
-#define GEF_PIC_CPU0_MCP_MASK	GEF_PIC_MCP_MASK(0)
-#define GEF_PIC_CPU1_MCP_MASK	GEF_PIC_MCP_MASK(1)
-
-
-static DEFINE_RAW_SPINLOCK(gef_pic_lock);
-
-static void __iomem *gef_pic_irq_reg_base;
-static struct irq_host *gef_pic_irq_host;
-static int gef_pic_cascade_irq;
-
-/*
- * Interrupt Controller Handling
- *
- * The interrupt controller handles interrupts for most on board interrupts,
- * apart from PCI interrupts. For example on SBC610:
- *
- * 17:31 RO Reserved
- * 16    RO PCI Express Doorbell 3 Status
- * 15    RO PCI Express Doorbell 2 Status
- * 14    RO PCI Express Doorbell 1 Status
- * 13    RO PCI Express Doorbell 0 Status
- * 12    RO Real Time Clock Interrupt Status
- * 11    RO Temperature Interrupt Status
- * 10    RO Temperature Critical Interrupt Status
- * 9     RO Ethernet PHY1 Interrupt Status
- * 8     RO Ethernet PHY3 Interrupt Status
- * 7     RO PEX8548 Interrupt Status
- * 6     RO Reserved
- * 5     RO Watchdog 0 Interrupt Status
- * 4     RO Watchdog 1 Interrupt Status
- * 3     RO AXIS Message FIFO A Interrupt Status
- * 2     RO AXIS Message FIFO B Interrupt Status
- * 1     RO AXIS Message FIFO C Interrupt Status
- * 0     RO AXIS Message FIFO D Interrupt Status
- *
- * Interrupts can be forwarded to one of two output lines. Nothing
- * clever is done, so if the masks are incorrectly set, a single input
- * interrupt could generate interrupts on both output lines!
- *
- * The dual lines are there to allow the chained interrupts to be easily
- * passed into two different cores. We currently do not use this functionality
- * in this driver.
- *
- * Controller can also be configured to generate Machine checks (MCP), again on
- * two lines, to be attached to two different cores. It is suggested that these
- * should be masked out.
- */
-
-void gef_pic_cascade(unsigned int irq, struct irq_desc *desc)
-{
-	struct irq_chip *chip = irq_desc_get_chip(desc);
-	unsigned int cascade_irq;
-
-	/*
-	 * See if we actually have an interrupt, call generic handling code if
-	 * we do.
-	 */
-	cascade_irq = gef_pic_get_irq();
-
-	if (cascade_irq != NO_IRQ)
-		generic_handle_irq(cascade_irq);
-
-	chip->irq_eoi(&desc->irq_data);
-}
-
-static void gef_pic_mask(struct irq_data *d)
-{
-	unsigned long flags;
-	unsigned int hwirq = irqd_to_hwirq(d);
-	u32 mask;
-
-	raw_spin_lock_irqsave(&gef_pic_lock, flags);
-	mask = in_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0));
-	mask &= ~(1 << hwirq);
-	out_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0), mask);
-	raw_spin_unlock_irqrestore(&gef_pic_lock, flags);
-}
-
-static void gef_pic_mask_ack(struct irq_data *d)
-{
-	/* Don't think we actually have to do anything to ack an interrupt,
-	 * we just need to clear down the devices interrupt and it will go away
-	 */
-	gef_pic_mask(d);
-}
-
-static void gef_pic_unmask(struct irq_data *d)
-{
-	unsigned long flags;
-	unsigned int hwirq = irqd_to_hwirq(d);
-	u32 mask;
-
-	raw_spin_lock_irqsave(&gef_pic_lock, flags);
-	mask = in_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0));
-	mask |= (1 << hwirq);
-	out_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0), mask);
-	raw_spin_unlock_irqrestore(&gef_pic_lock, flags);
-}
-
-static struct irq_chip gef_pic_chip = {
-	.name		= "gefp",
-	.irq_mask	= gef_pic_mask,
-	.irq_mask_ack	= gef_pic_mask_ack,
-	.irq_unmask	= gef_pic_unmask,
-};
-
-
-/* When an interrupt is being configured, this call allows some flexibilty
- * in deciding which irq_chip structure is used
- */
-static int gef_pic_host_map(struct irq_host *h, unsigned int virq,
-			  irq_hw_number_t hwirq)
-{
-	/* All interrupts are LEVEL sensitive */
-	irq_set_status_flags(virq, IRQ_LEVEL);
-	irq_set_chip_and_handler(virq, &gef_pic_chip, handle_level_irq);
-
-	return 0;
-}
-
-static int gef_pic_host_xlate(struct irq_host *h, struct device_node *ct,
-			    const u32 *intspec, unsigned int intsize,
-			    irq_hw_number_t *out_hwirq, unsigned int *out_flags)
-{
-
-	*out_hwirq = intspec[0];
-	if (intsize > 1)
-		*out_flags = intspec[1];
-	else
-		*out_flags = IRQ_TYPE_LEVEL_HIGH;
-
-	return 0;
-}
-
-static struct irq_host_ops gef_pic_host_ops = {
-	.map	= gef_pic_host_map,
-	.xlate	= gef_pic_host_xlate,
-};
-
-
-/*
- * Initialisation of PIC, this should be called in BSP
- */
-void __init gef_pic_init(struct device_node *np)
-{
-	unsigned long flags;
-
-	/* Map the devices registers into memory */
-	gef_pic_irq_reg_base = of_iomap(np, 0);
-
-	raw_spin_lock_irqsave(&gef_pic_lock, flags);
-
-	/* Initialise everything as masked. */
-	out_be32(gef_pic_irq_reg_base + GEF_PIC_CPU0_INTR_MASK, 0);
-	out_be32(gef_pic_irq_reg_base + GEF_PIC_CPU1_INTR_MASK, 0);
-
-	out_be32(gef_pic_irq_reg_base + GEF_PIC_CPU0_MCP_MASK, 0);
-	out_be32(gef_pic_irq_reg_base + GEF_PIC_CPU1_MCP_MASK, 0);
-
-	raw_spin_unlock_irqrestore(&gef_pic_lock, flags);
-
-	/* Map controller */
-	gef_pic_cascade_irq = irq_of_parse_and_map(np, 0);
-	if (gef_pic_cascade_irq == NO_IRQ) {
-		printk(KERN_ERR "SBC610: failed to map cascade interrupt");
-		return;
-	}
-
-	/* Setup an irq_host structure */
-	gef_pic_irq_host = irq_alloc_host(np, IRQ_HOST_MAP_LINEAR,
-					  GEF_PIC_NUM_IRQS,
-					  &gef_pic_host_ops, NO_IRQ);
-	if (gef_pic_irq_host == NULL)
-		return;
-
-	/* Chain with parent controller */
-	irq_set_chained_handler(gef_pic_cascade_irq, gef_pic_cascade);
-}
-
-/*
- * This is called when we receive an interrupt with apparently comes from this
- * chip - check, returning the highest interrupt generated or return NO_IRQ
- */
-unsigned int gef_pic_get_irq(void)
-{
-	u32 cause, mask, active;
-	unsigned int virq = NO_IRQ;
-	int hwirq;
-
-	cause = in_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_STATUS);
-
-	mask = in_be32(gef_pic_irq_reg_base + GEF_PIC_INTR_MASK(0));
-
-	active = cause & mask;
-
-	if (active) {
-		for (hwirq = GEF_PIC_NUM_IRQS - 1; hwirq > -1; hwirq--) {
-			if (active & (0x1 << hwirq))
-				break;
-		}
-		virq = irq_linear_revmap(gef_pic_irq_host,
-			(irq_hw_number_t)hwirq);
-	}
-
-	return virq;
-}
-
diff --git a/arch/powerpc/platforms/86xx/gef_pic.h b/arch/powerpc/platforms/86xx/gef_pic.h
deleted file mode 100644
index 6149916da3f..00000000000
--- a/arch/powerpc/platforms/86xx/gef_pic.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef __GEF_PIC_H__
-#define __GEF_PIC_H__
-
-#include <linux/init.h>
-
-void gef_pic_cascade(unsigned int, struct irq_desc *);
-unsigned int gef_pic_get_irq(void);
-void gef_pic_init(struct device_node *);
-
-#endif /* __GEF_PIC_H__ */
-
diff --git a/arch/powerpc/platforms/86xx/gef_ppc9a.c b/arch/powerpc/platforms/86xx/gef_ppc9a.c
index 60ce07e3910..ed58b6cfd60 100644
--- a/arch/powerpc/platforms/86xx/gef_ppc9a.c
+++ b/arch/powerpc/platforms/86xx/gef_ppc9a.c
@@ -37,9 +37,9 @@
 
 #include <sysdev/fsl_pci.h>
 #include <sysdev/fsl_soc.h>
+#include <sysdev/ge/ge_pic.h>
 
 #include "mpc86xx.h"
-#include "gef_pic.h"
 
 #undef DEBUG
 
diff --git a/arch/powerpc/platforms/86xx/gef_sbc310.c b/arch/powerpc/platforms/86xx/gef_sbc310.c
index 3ecee25bf3e..710db69bd52 100644
--- a/arch/powerpc/platforms/86xx/gef_sbc310.c
+++ b/arch/powerpc/platforms/86xx/gef_sbc310.c
@@ -37,9 +37,9 @@
 
 #include <sysdev/fsl_pci.h>
 #include <sysdev/fsl_soc.h>
+#include <sysdev/ge/ge_pic.h>
 
 #include "mpc86xx.h"
-#include "gef_pic.h"
 
 #undef DEBUG
 
diff --git a/arch/powerpc/platforms/86xx/gef_sbc610.c b/arch/powerpc/platforms/86xx/gef_sbc610.c
index 5090d608d9e..4a13d2f4ac2 100644
--- a/arch/powerpc/platforms/86xx/gef_sbc610.c
+++ b/arch/powerpc/platforms/86xx/gef_sbc610.c
@@ -37,9 +37,9 @@
 
 #include <sysdev/fsl_pci.h>
 #include <sysdev/fsl_soc.h>
+#include <sysdev/ge/ge_pic.h>
 
 #include "mpc86xx.h"
-#include "gef_pic.h"
 
 #undef DEBUG