diff options
Diffstat (limited to 'arch/mips/ddb5xxx/ddb5476/irq.c')
| -rw-r--r-- | arch/mips/ddb5xxx/ddb5476/irq.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/arch/mips/ddb5xxx/ddb5476/irq.c b/arch/mips/ddb5xxx/ddb5476/irq.c new file mode 100644 index 00000000000..5388b5868c4 --- /dev/null +++ b/arch/mips/ddb5xxx/ddb5476/irq.c @@ -0,0 +1,143 @@ +/* + * arch/mips/ddb5476/irq.c -- NEC DDB Vrc-5476 interrupt routines + * + * Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com> + * Sony Software Development Center Europe (SDCE), Brussels + * + * Re-write the whole thing to use new irq.c file. + * Copyright (C) 2001 MontaVista Software Inc. + * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net + * + */ +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/interrupt.h> + +#include <asm/i8259.h> +#include <asm/io.h> +#include <asm/ptrace.h> + +#include <asm/ddb5xxx/ddb5xxx.h> + +#define M1543_PNP_CONFIG 0x03f0 /* PnP Config Port */ +#define M1543_PNP_INDEX 0x03f0 /* PnP Index Port */ +#define M1543_PNP_DATA 0x03f1 /* PnP Data Port */ + +#define M1543_PNP_ALT_CONFIG 0x0370 /* Alternative PnP Config Port */ +#define M1543_PNP_ALT_INDEX 0x0370 /* Alternative PnP Index Port */ +#define M1543_PNP_ALT_DATA 0x0371 /* Alternative PnP Data Port */ + +#define M1543_INT1_MASTER_CTRL 0x0020 /* INT_1 (master) Control Register */ +#define M1543_INT1_MASTER_MASK 0x0021 /* INT_1 (master) Mask Register */ + +#define M1543_INT1_SLAVE_CTRL 0x00a0 /* INT_1 (slave) Control Register */ +#define M1543_INT1_SLAVE_MASK 0x00a1 /* INT_1 (slave) Mask Register */ + +#define M1543_INT1_MASTER_ELCR 0x04d0 /* INT_1 (master) Edge/Level Control */ +#define M1543_INT1_SLAVE_ELCR 0x04d1 /* INT_1 (slave) Edge/Level Control */ + +static void m1543_irq_setup(void) +{ + /* + * The ALI M1543 has 13 interrupt inputs, IRQ1..IRQ13. Not all + * the possible IO sources in the M1543 are in use by us. We will + * use the following mapping: + * + * IRQ1 - keyboard (default set by M1543) + * IRQ3 - reserved for UART B (default set by M1543) (note that + * the schematics for the DDB Vrc-5476 board seem to + * indicate that IRQ3 is connected to the DS1386 + * watchdog timer interrupt output so we might have + * a conflict) + * IRQ4 - reserved for UART A (default set by M1543) + * IRQ5 - parallel (default set by M1543) + * IRQ8 - DS1386 time of day (RTC) interrupt + * IRQ9 - USB (hardwired in ddb_setup) + * IRQ10 - PMU (hardwired in ddb_setup) + * IRQ12 - mouse + * IRQ14,15 - IDE controller (need to be confirmed, jsun) + */ + + /* + * Assing mouse interrupt to IRQ12 + */ + + /* Enter configuration mode */ + outb(0x51, M1543_PNP_CONFIG); + outb(0x23, M1543_PNP_CONFIG); + + /* Select logical device 7 (Keyboard) */ + outb(0x07, M1543_PNP_INDEX); + outb(0x07, M1543_PNP_DATA); + + /* Select IRQ12 */ + outb(0x72, M1543_PNP_INDEX); + outb(0x0c, M1543_PNP_DATA); + + /* Leave configration mode */ + outb(0xbb, M1543_PNP_CONFIG); +} + +static void nile4_irq_setup(void) +{ + int i; + + /* Map all interrupts to CPU int #0 (IP2) */ + nile4_map_irq_all(0); + + /* PCI INTA#-E# must be level triggered */ + nile4_set_pci_irq_level_or_edge(0, 1); + nile4_set_pci_irq_level_or_edge(1, 1); + nile4_set_pci_irq_level_or_edge(2, 1); + nile4_set_pci_irq_level_or_edge(3, 1); + + /* PCI INTA#, B#, D# must be active low, INTC# must be active high */ + nile4_set_pci_irq_polarity(0, 0); + nile4_set_pci_irq_polarity(1, 0); + nile4_set_pci_irq_polarity(2, 1); + nile4_set_pci_irq_polarity(3, 0); + + for (i = 0; i < 16; i++) + nile4_clear_irq(i); + + /* Enable CPU int #0 */ + nile4_enable_irq_output(0); + + /* memory resource acquire in ddb_setup */ +} + +static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL }; +static struct irqaction irq_error = { no_action, 0, CPU_MASK_NONE, "error", NULL, NULL }; + +extern asmlinkage void ddb5476_handle_int(void); +extern int setup_irq(unsigned int irq, struct irqaction *irqaction); +extern void mips_cpu_irq_init(u32 irq_base); +extern void vrc5476_irq_init(u32 irq_base); + +void __init arch_init_irq(void) +{ + /* hardware initialization */ + nile4_irq_setup(); + m1543_irq_setup(); + + /* controller setup */ + init_i8259_irqs(); + vrc5476_irq_init(VRC5476_IRQ_BASE); + mips_cpu_irq_init(CPU_IRQ_BASE); + + /* setup cascade interrupts */ + setup_irq(VRC5476_IRQ_BASE + VRC5476_I8259_CASCADE, &irq_cascade); + setup_irq(CPU_IRQ_BASE + CPU_VRC5476_CASCADE, &irq_cascade); + + /* setup error interrupts for debugging */ + setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_CPCE, &irq_error); + setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_CNTD, &irq_error); + setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_MCE, &irq_error); + setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_LBRT, &irq_error); + setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCIS, &irq_error); + setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCI, &irq_error); + + /* setup the grandpa intr vector */ + set_except_vector(0, ddb5476_handle_int); +} |