[POWERPC] Update mpc7448hpc2 board irq support using device tree

The patch rewrites mpc7448hpc2 board irq support according to the new
mpic device tree interface.

Signed-off-by: Roy Zang	<tie-fei.zang@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 42 insertions, 62 deletions

diff --git a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
index d7a4fc7ca238..ed00ed2455dd 100644
--- a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
+++ b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
@@ -1,7 +1,7 @@
 /*
  * mpc7448_hpc2.c
  *
- * Board setup routines for the Freescale Taiga platform
+ * Board setup routines for the Freescale mpc7448hpc2(taiga) platform
  *
  * Author: Jacob Pan
  *	 jacob.pan@freescale.com
@@ -12,10 +12,10 @@
  *
  * Copyright 2004-2006 Freescale Semiconductor, 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.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/config.h>
@@ -62,43 +62,8 @@ pci_dram_offset = MPC7448_HPC2_PCI_MEM_OFFSET;
 extern int tsi108_setup_pci(struct device_node *dev);
 extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val);
 extern void tsi108_pci_int_init(void);
-extern int tsi108_irq_cascade(struct pt_regs *regs, void *unused);
-
-/*
- * Define all of the IRQ senses and polarities.  Taken from the
- * mpc7448hpc  manual.
- * Note:  Likely, this table and the following function should be
- *        obtained and derived from the OF Device Tree.
- */
-
-static u_char mpc7448_hpc2_pic_initsenses[] __initdata = {
-	/* External on-board sources */
-	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* INT[0] XINT0 from FPGA */
-	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* INT[1] XINT1 from FPGA */
-	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* INT[2] PHY_INT from both GIGE */
-	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* INT[3] RESERVED */
-	/* Internal Tsi108/109 interrupt sources */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* Reserved IRQ */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* Reserved IRQ */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* Reserved IRQ */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* Reserved IRQ */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* DMA0 */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* DMA1 */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* DMA2 */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* DMA3 */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* UART0 */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* UART1 */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* I2C */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* GPIO */
-	(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),	/* GIGE0 */
-	(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),	/* GIGE1 */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* Reserved IRQ */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* HLP */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* SDC */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* Processor IF */
-	(IRQ_SENSE_EDGE  | IRQ_POLARITY_POSITIVE),	/* Reserved IRQ */
-	(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),	/* PCI/X block */
-};
+extern void tsi108_irq_cascade(unsigned int irq, struct irq_desc *desc,
+			    struct pt_regs *regs);
 
 int mpc7448_hpc2_exclude_device(u_char bus, u_char devfn)
 {
@@ -229,6 +194,8 @@ static void __init mpc7448_hpc2_init_IRQ(void)
 {
 	struct mpic *mpic;
 	phys_addr_t mpic_paddr = 0;
+	unsigned int cascade_pci_irq;
+	struct device_node *tsi_pci;
 	struct device_node *tsi_pic;
 
 	tsi_pic = of_find_node_by_type(NULL, "open-pic");
@@ -246,24 +213,31 @@ static void __init mpc7448_hpc2_init_IRQ(void)
 	DBG("%s: tsi108pic phys_addr = 0x%x\n", __FUNCTION__,
 	    (u32) mpic_paddr);
 
-	mpic = mpic_alloc(mpic_paddr,
+	mpic = mpic_alloc(tsi_pic, mpic_paddr,
 			MPIC_PRIMARY | MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
 			MPIC_SPV_EOI | MPIC_MOD_ID(MPIC_ID_TSI108),
 			0, /* num_sources used */
-			TSI108_IRQ_BASE,
 			0, /* num_sources used */
-			NR_IRQS - 4 /* XXXX */,
-			mpc7448_hpc2_pic_initsenses,
-			sizeof(mpc7448_hpc2_pic_initsenses), "Tsi108_PIC");
+			"Tsi108_PIC");
 
 	BUG_ON(mpic == NULL); /* XXXX */
-
 	mpic_init(mpic);
-	mpic_setup_cascade(IRQ_TSI108_PCI, tsi108_irq_cascade, mpic);
+
+	tsi_pci = of_find_node_by_type(NULL, "pci");
+	if (tsi_pci == 0) {
+		printk("%s: No tsi108 pci node found !\n", __FUNCTION__);
+		return;
+	}
+
+	cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
+	set_irq_data(cascade_pci_irq, mpic);
+	set_irq_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
+
 	tsi108_pci_int_init();
 
 	/* Configure MPIC outputs to CPU0 */
 	tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
+	of_node_put(tsi_pic);
 }
 
 void mpc7448_hpc2_show_cpuinfo(struct seq_file *m)
@@ -320,6 +294,7 @@ static int mpc7448_machine_check_exception(struct pt_regs *regs)
 	return 0;
 
 }
+
 define_machine(mpc7448_hpc2){
 	.name 			= "MPC7448 HPC2",
 	.probe 			= mpc7448_hpc2_probe,
diff --git a/arch/powerpc/sysdev/tsi108_dev.c b/arch/powerpc/sysdev/tsi108_dev.c
index 26a0cc820cde..f3038461d4c0 100644
--- a/arch/powerpc/sysdev/tsi108_dev.c
+++ b/arch/powerpc/sysdev/tsi108_dev.c
@@ -93,13 +93,15 @@ static int __init tsi108_eth_of_init(void)
 			goto err;
 
 		r[1].name = "tx";
-		r[1].start = np->intrs[0].line;
-		r[1].end = np->intrs[0].line;
+		r[1].start = irq_of_parse_and_map(np, 0);
+		r[1].end = irq_of_parse_and_map(np, 0);
 		r[1].flags = IORESOURCE_IRQ;
+		DBG("%s: name:start->end = %s:0x%lx-> 0x%lx\n",
+			__FUNCTION__,r[1].name, r[1].start, r[1].end);
 
 		tsi_eth_dev =
 		    platform_device_register_simple("tsi-ethernet", i, &r[0],
-						    np->n_intrs + 1);
+						    1);
 
 		if (IS_ERR(tsi_eth_dev)) {
 			ret = PTR_ERR(tsi_eth_dev);
@@ -127,7 +129,7 @@ static int __init tsi108_eth_of_init(void)
 		tsi_eth_data.regs = r[0].start;
 		tsi_eth_data.phyregs = res.start;
 		tsi_eth_data.phy = *phy_id;
-		tsi_eth_data.irq_num = np->intrs[0].line;
+		tsi_eth_data.irq_num = irq_of_parse_and_map(np, 0);
 		of_node_put(phy);
 		ret =
 		    platform_device_add_data(tsi_eth_dev, &tsi_eth_data,
diff --git a/arch/powerpc/sysdev/tsi108_pci.c b/arch/powerpc/sysdev/tsi108_pci.c
index 3265d54c82ed..2ab06ed3ae73 100644
--- a/arch/powerpc/sysdev/tsi108_pci.c
+++ b/arch/powerpc/sysdev/tsi108_pci.c
@@ -26,7 +26,6 @@
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 
-
 #include <asm/byteorder.h>
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -228,7 +227,7 @@ int __init tsi108_setup_pci(struct device_node *dev)
 
 	(hose)->ops = &tsi108_direct_pci_ops;
 
-	printk(KERN_INFO "Found tsi108 PCI host bridge at 0x%08lx. "
+	printk(KERN_INFO "Found tsi108 PCI host bridge at 0x%08x. "
 	       "Firmware bus number: %d->%d\n",
 	       rsrc.start, hose->first_busno, hose->last_busno);
 
@@ -278,7 +277,7 @@ static void init_pci_source(void)
 	mb();
 }
 
-static inline int get_pci_source(void)
+static inline unsigned int get_pci_source(void)
 {
 	u_int temp = 0;
 	int irq = -1;
@@ -371,12 +370,12 @@ static void tsi108_pci_irq_end(u_int irq)
  * Interrupt controller descriptor for cascaded PCI interrupt controller.
  */
 
-struct hw_interrupt_type tsi108_pci_irq = {
+static struct irq_chip tsi108_pci_irq = {
 	.typename = "tsi108_PCI_int",
-	.enable = tsi108_pci_irq_enable,
-	.disable = tsi108_pci_irq_disable,
+	.mask = tsi108_pci_irq_disable,
 	.ack = tsi108_pci_irq_ack,
 	.end = tsi108_pci_irq_end,
+	.unmask = tsi108_pci_irq_enable,
 };
 
 /*
@@ -399,14 +398,18 @@ void __init tsi108_pci_int_init(void)
 	DBG("Tsi108_pci_int_init: initializing PCI interrupts\n");
 
 	for (i = 0; i < NUM_PCI_IRQS; i++) {
-		irq_desc[i + IRQ_PCI_INTAD_BASE].handler = &tsi108_pci_irq;
+		irq_desc[i + IRQ_PCI_INTAD_BASE].chip = &tsi108_pci_irq;
 		irq_desc[i + IRQ_PCI_INTAD_BASE].status |= IRQ_LEVEL;
 	}
 
 	init_pci_source();
 }
 
-int tsi108_irq_cascade(struct pt_regs *regs, void *unused)
+void tsi108_irq_cascade(unsigned int irq, struct irq_desc *desc,
+			    struct pt_regs *regs)
 {
-	return get_pci_source();
+	unsigned int cascade_irq = get_pci_source();
+	if (cascade_irq != NO_IRQ)
+		generic_handle_irq(cascade_irq, regs);
+	desc->chip->eoi(irq);
 }