[POWERPC] Make pci_read_irq_line the default on mpc7448hpc2 board

The following patch adds a tsi108/9 pci interrupt controller host.
On mpc7448hpc2 board, pci_irq_fixup function is removed, which makes the
pci_read_irq_line be the default pci irq fixup.

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

1 files changed, 23 insertions, 65 deletions

diff --git a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
index c6113c39009e..3fcc85f60fbf 100644
--- a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
+++ b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
@@ -60,7 +60,7 @@ 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 void tsi108_pci_int_init(struct device_node *node);
 extern void tsi108_irq_cascade(unsigned int irq, struct irq_desc *desc);
 
 int mpc7448_hpc2_exclude_device(u_char bus, u_char devfn)
@@ -71,59 +71,6 @@ int mpc7448_hpc2_exclude_device(u_char bus, u_char devfn)
                 return PCIBIOS_SUCCESSFUL;
 }
 
-/*
- * find pci slot by devfn in interrupt map of OF tree
- */
-u8 find_slot_by_devfn(unsigned int *interrupt_map, unsigned int devfn)
-{
-        int i;
-        unsigned int tmp;
-        for (i = 0; i < 4; i++){
-                tmp = interrupt_map[i*4*7];
-                if ((tmp >> 11) == (devfn >> 3))
-                        return i;
-        }
-        return i;
-}
-
-/*
- * Scans the interrupt map for pci device
- */
-void __devinit mpc7448_hpc2_fixup_irq(struct pci_dev *dev)
-{
-        struct pci_controller *hose;
-        struct device_node *node;
-        const unsigned int *interrupt;
-        int busnr;
-        int len;
-        u8 slot;
-        u8 pin;
-
-        /* Lookup the hose */
-        busnr = dev->bus->number;
-        hose = pci_bus_to_hose(busnr);
-        if (!hose)
-                printk(KERN_ERR "No pci hose found\n");
-
-        /* Check it has an OF node associated */
-        node = (struct device_node *) hose->arch_data;
-        if (!node)
-                printk(KERN_ERR "No pci node found\n");
-
-        interrupt = get_property(node, "interrupt-map", &len);
-        slot = find_slot_by_devfn(interrupt, dev->devfn);
-        pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
-        if (pin == 0 || pin > 4)
-                pin = 1;
-        pin--;
-        dev->irq  = interrupt[slot*4*7 + pin*7 + 5];
-
-        pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
-
-        DBG("TSI_PCI: dev->irq = 0x%x\n", dev->irq);
-}
-/* temporary pci irq map fixup*/
-
 static void __init mpc7448_hpc2_setup_arch(void)
 {
         struct device_node *cpu;
@@ -186,9 +133,12 @@ static void __init mpc7448_hpc2_init_IRQ(void)
 {
         struct mpic *mpic;
         phys_addr_t mpic_paddr = 0;
+        struct device_node *tsi_pic;
+#ifdef CONFIG_PCI
         unsigned int cascade_pci_irq;
         struct device_node *tsi_pci;
-        struct device_node *tsi_pic;
+        struct device_node *cascade_node = NULL;
+#endif
 
         tsi_pic = of_find_node_by_type(NULL, "open-pic");
         if (tsi_pic) {
@@ -202,31 +152,41 @@ static void __init mpc7448_hpc2_init_IRQ(void)
                 return;
         }
 
-        DBG("%s: tsi108pic phys_addr = 0x%x\n", __FUNCTION__,
+        DBG("%s: tsi108 pic phys_addr = 0x%x\n", __FUNCTION__,
             (u32) mpic_paddr);
 
         mpic = mpic_alloc(tsi_pic, mpic_paddr,
                         MPIC_PRIMARY | MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
                         MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
-                        0, /* num_sources used */
-                        0, /* num_sources used */
+                        24,
+                        NR_IRQS-4, /* num_sources used */
                         "Tsi108_PIC");
 
-        BUG_ON(mpic == NULL); /* XXXX */
+        BUG_ON(mpic == NULL);
+
+        mpic_assign_isu(mpic, 0, mpic_paddr + 0x100);
+
         mpic_init(mpic);
 
+#ifdef CONFIG_PCI
         tsi_pci = of_find_node_by_type(NULL, "pci");
-        if (tsi_pci == 0) {
+        if (tsi_pci == NULL) {
                 printk("%s: No tsi108 pci node found !\n", __FUNCTION__);
                 return;
         }
+        cascade_node = of_find_node_by_type(NULL, "pic-router");
+        if (cascade_node == NULL) {
+                printk("%s: No tsi108 pci cascade node found !\n", __FUNCTION__);
+                return;
+        }
 
         cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
+        DBG("%s: tsi108 cascade_pci_irq = 0x%x\n", __FUNCTION__,
+            (u32) cascade_pci_irq);
+        tsi108_pci_int_init(cascade_node);
         set_irq_data(cascade_pci_irq, mpic);
         set_irq_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
-
-        tsi108_pci_int_init();
-
+#endif
         /* Configure MPIC outputs to CPU0 */
         tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
         of_node_put(tsi_pic);
@@ -284,7 +244,6 @@ static int mpc7448_machine_check_exception(struct pt_regs *regs)
                 return 1;
         }
         return 0;
-
 }
 
 define_machine(mpc7448_hpc2){
@@ -294,7 +253,6 @@ define_machine(mpc7448_hpc2){
         .init_IRQ               = mpc7448_hpc2_init_IRQ,
         .show_cpuinfo           = mpc7448_hpc2_show_cpuinfo,
         .get_irq                = mpic_get_irq,
-        .pci_irq_fixup          = mpc7448_hpc2_fixup_irq,
         .restart                = mpc7448_hpc2_restart,
         .calibrate_decr         = generic_calibrate_decr,
         .machine_check_exception= mpc7448_machine_check_exception,