1/* 2 * arch/sh/boards/superh/microdev/irq.c 3 * 4 * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com) 5 * 6 * SuperH SH4-202 MicroDev board support. 7 * 8 * May be copied or modified under the terms of the GNU General Public 9 * License. See linux/COPYING for more information. 10 */ 11 12#include <linux/init.h> 13#include <linux/irq.h> 14#include <linux/interrupt.h> 15#include <asm/system.h> 16#include <asm/io.h> 17#include <mach/microdev.h> 18 19#define NUM_EXTERNAL_IRQS 16 /* IRL0 .. IRL15 */ 20 21static const struct { 22 unsigned char fpgaIrq; 23 unsigned char mapped; 24 const char *name; 25} fpgaIrqTable[NUM_EXTERNAL_IRQS] = { 26 { 0, 0, "unused" }, /* IRQ #0 IRL=15 0x200 */ 27 { MICRODEV_FPGA_IRQ_KEYBOARD, 1, "keyboard" }, /* IRQ #1 IRL=14 0x220 */ 28 { MICRODEV_FPGA_IRQ_SERIAL1, 1, "Serial #1"}, /* IRQ #2 IRL=13 0x240 */ 29 { MICRODEV_FPGA_IRQ_ETHERNET, 1, "Ethernet" }, /* IRQ #3 IRL=12 0x260 */ 30 { MICRODEV_FPGA_IRQ_SERIAL2, 0, "Serial #2"}, /* IRQ #4 IRL=11 0x280 */ 31 { 0, 0, "unused" }, /* IRQ #5 IRL=10 0x2a0 */ 32 { 0, 0, "unused" }, /* IRQ #6 IRL=9 0x2c0 */ 33 { MICRODEV_FPGA_IRQ_USB_HC, 1, "USB" }, /* IRQ #7 IRL=8 0x2e0 */ 34 { MICRODEV_IRQ_PCI_INTA, 1, "PCI INTA" }, /* IRQ #8 IRL=7 0x300 */ 35 { MICRODEV_IRQ_PCI_INTB, 1, "PCI INTB" }, /* IRQ #9 IRL=6 0x320 */ 36 { MICRODEV_IRQ_PCI_INTC, 1, "PCI INTC" }, /* IRQ #10 IRL=5 0x340 */ 37 { MICRODEV_IRQ_PCI_INTD, 1, "PCI INTD" }, /* IRQ #11 IRL=4 0x360 */ 38 { MICRODEV_FPGA_IRQ_MOUSE, 1, "mouse" }, /* IRQ #12 IRL=3 0x380 */ 39 { MICRODEV_FPGA_IRQ_IDE2, 1, "IDE #2" }, /* IRQ #13 IRL=2 0x3a0 */ 40 { MICRODEV_FPGA_IRQ_IDE1, 1, "IDE #1" }, /* IRQ #14 IRL=1 0x3c0 */ 41 { 0, 0, "unused" }, /* IRQ #15 IRL=0 0x3e0 */ 42}; 43 44#if (MICRODEV_LINUX_IRQ_KEYBOARD != 1) 45# error Inconsistancy in defining the IRQ# for Keyboard! 46#endif 47 48#if (MICRODEV_LINUX_IRQ_ETHERNET != 3) 49# error Inconsistancy in defining the IRQ# for Ethernet! 50#endif 51 52#if (MICRODEV_LINUX_IRQ_USB_HC != 7) 53# error Inconsistancy in defining the IRQ# for USB! 54#endif 55 56#if (MICRODEV_LINUX_IRQ_MOUSE != 12) 57# error Inconsistancy in defining the IRQ# for PS/2 Mouse! 58#endif 59 60#if (MICRODEV_LINUX_IRQ_IDE2 != 13) 61# error Inconsistancy in defining the IRQ# for secondary IDE! 62#endif 63 64#if MICRODEV_LINUX_IRQ_IDE04 65# error Inconsistancy in defining the IRQ# for primary IDE! 66#endif 67 68static void enable_microdev_irq(unsigned int irq); 69static void disable_microdev_irq(unsigned int irq); 70static void mask_and_ack_microdev(unsigned int); 71 72static struct irq_chip microdev_irq_type = { 73 .name = "MicroDev-IRQ", 74 .unmask = enable_microdev_irq, 75 .mask = disable_microdev_irq, 76 .ack = mask_and_ack_microdev, 77}; 78 79static void disable_microdev_irq(unsigned int irq) 80{ 81 unsigned int fpgaIrq; 82 83 if (irq >= NUM_EXTERNAL_IRQS) 84 return; 85 if (!fpgaIrqTable[irq].mapped) 86 return; 87 88 fpgaIrq = fpgaIrqTable[irq].fpgaIrq; 89 90 /* disable interrupts on the FPGA INTC register */ 91 __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG); 92} 93 94static void enable_microdev_irq(unsigned int irq) 95{ 96 unsigned long priorityReg, priorities, pri; 97 unsigned int fpgaIrq; 98 99 if (unlikely(irq >= NUM_EXTERNAL_IRQS)) 100 return; 101 if (unlikely(!fpgaIrqTable[irq].mapped)) 102 return; 103 104 pri = 15 - irq; 105 106 fpgaIrq = fpgaIrqTable[irq].fpgaIrq; 107 priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq); 108 109 /* set priority for the interrupt */ 110 priorities = __raw_readl(priorityReg); 111 priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq); 112 priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri); 113 __raw_writel(priorities, priorityReg); 114 115 /* enable interrupts on the FPGA INTC register */ 116 __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG); 117} 118 119/* This function sets the desired irq handler to be a MicroDev type */ 120static void __init make_microdev_irq(unsigned int irq) 121{ 122 disable_irq_nosync(irq); 123 set_irq_chip_and_handler(irq, µdev_irq_type, handle_level_irq); 124 disable_microdev_irq(irq); 125} 126 127static void mask_and_ack_microdev(unsigned int irq) 128{ 129 disable_microdev_irq(irq); 130} 131 132extern void __init init_microdev_irq(void) 133{ 134 int i; 135 136 /* disable interrupts on the FPGA INTC register */ 137 __raw_writel(~0ul, MICRODEV_FPGA_INTDSB_REG); 138 139 for (i = 0; i < NUM_EXTERNAL_IRQS; i++) 140 make_microdev_irq(i); 141} 142 143extern void microdev_print_fpga_intc_status(void) 144{ 145 volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG; 146 volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG; 147 volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0); 148 volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8); 149 volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16); 150 volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24); 151 volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG; 152 volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG; 153 154 printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n"); 155 printk("FPGA_INTENB = 0x%08x\n", *intenb); 156 printk("FPGA_INTDSB = 0x%08x\n", *intdsb); 157 printk("FPGA_INTSRC = 0x%08x\n", *intsrc); 158 printk("FPGA_INTREQ = 0x%08x\n", *intreq); 159 printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", *intprid, *intpric, *intprib, *intpria); 160 printk("-------------------------------------------------------------------------------\n"); 161} 162