[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);
 }