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/io.h> 16 #include <mach/microdev.h> 17 18 #define NUM_EXTERNAL_IRQS 16 /* IRL0 .. IRL15 */ 19 20 static const struct { 21 unsigned char fpgaIrq; 22 unsigned char mapped; 23 const char *name; 24 } fpgaIrqTable[NUM_EXTERNAL_IRQS] = { 25 { 0, 0, "unused" }, /* IRQ #0 IRL=15 0x200 */ 26 { MICRODEV_FPGA_IRQ_KEYBOARD, 1, "keyboard" }, /* IRQ #1 IRL=14 0x220 */ 27 { MICRODEV_FPGA_IRQ_SERIAL1, 1, "Serial #1"}, /* IRQ #2 IRL=13 0x240 */ 28 { MICRODEV_FPGA_IRQ_ETHERNET, 1, "Ethernet" }, /* IRQ #3 IRL=12 0x260 */ 29 { MICRODEV_FPGA_IRQ_SERIAL2, 0, "Serial #2"}, /* IRQ #4 IRL=11 0x280 */ 30 { 0, 0, "unused" }, /* IRQ #5 IRL=10 0x2a0 */ 31 { 0, 0, "unused" }, /* IRQ #6 IRL=9 0x2c0 */ 32 { MICRODEV_FPGA_IRQ_USB_HC, 1, "USB" }, /* IRQ #7 IRL=8 0x2e0 */ 33 { MICRODEV_IRQ_PCI_INTA, 1, "PCI INTA" }, /* IRQ #8 IRL=7 0x300 */ 34 { MICRODEV_IRQ_PCI_INTB, 1, "PCI INTB" }, /* IRQ #9 IRL=6 0x320 */ 35 { MICRODEV_IRQ_PCI_INTC, 1, "PCI INTC" }, /* IRQ #10 IRL=5 0x340 */ 36 { MICRODEV_IRQ_PCI_INTD, 1, "PCI INTD" }, /* IRQ #11 IRL=4 0x360 */ 37 { MICRODEV_FPGA_IRQ_MOUSE, 1, "mouse" }, /* IRQ #12 IRL=3 0x380 */ 38 { MICRODEV_FPGA_IRQ_IDE2, 1, "IDE #2" }, /* IRQ #13 IRL=2 0x3a0 */ 39 { MICRODEV_FPGA_IRQ_IDE1, 1, "IDE #1" }, /* IRQ #14 IRL=1 0x3c0 */ 40 { 0, 0, "unused" }, /* IRQ #15 IRL=0 0x3e0 */ 41 }; 42 43 #if (MICRODEV_LINUX_IRQ_KEYBOARD != 1) 44 # error Inconsistancy in defining the IRQ# for Keyboard! 45 #endif 46 47 #if (MICRODEV_LINUX_IRQ_ETHERNET != 3) 48 # error Inconsistancy in defining the IRQ# for Ethernet! 49 #endif 50 51 #if (MICRODEV_LINUX_IRQ_USB_HC != 7) 52 # error Inconsistancy in defining the IRQ# for USB! 53 #endif 54 55 #if (MICRODEV_LINUX_IRQ_MOUSE != 12) 56 # error Inconsistancy in defining the IRQ# for PS/2 Mouse! 57 #endif 58 59 #if (MICRODEV_LINUX_IRQ_IDE2 != 13) 60 # error Inconsistancy in defining the IRQ# for secondary IDE! 61 #endif 62 63 #if (MICRODEV_LINUX_IRQ_IDE1 != 14) 64 # error Inconsistancy in defining the IRQ# for primary IDE! 65 #endif 66 67 static void disable_microdev_irq(struct irq_data *data) 68 { 69 unsigned int irq = data->irq; 70 unsigned int fpgaIrq; 71 72 if (irq >= NUM_EXTERNAL_IRQS) 73 return; 74 if (!fpgaIrqTable[irq].mapped) 75 return; 76 77 fpgaIrq = fpgaIrqTable[irq].fpgaIrq; 78 79 /* disable interrupts on the FPGA INTC register */ 80 __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG); 81 } 82 83 static void enable_microdev_irq(struct irq_data *data) 84 { 85 unsigned int irq = data->irq; 86 unsigned long priorityReg, priorities, pri; 87 unsigned int fpgaIrq; 88 89 if (unlikely(irq >= NUM_EXTERNAL_IRQS)) 90 return; 91 if (unlikely(!fpgaIrqTable[irq].mapped)) 92 return; 93 94 pri = 15 - irq; 95 96 fpgaIrq = fpgaIrqTable[irq].fpgaIrq; 97 priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq); 98 99 /* set priority for the interrupt */ 100 priorities = __raw_readl(priorityReg); 101 priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq); 102 priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri); 103 __raw_writel(priorities, priorityReg); 104 105 /* enable interrupts on the FPGA INTC register */ 106 __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG); 107 } 108 109 static struct irq_chip microdev_irq_type = { 110 .name = "MicroDev-IRQ", 111 .irq_unmask = enable_microdev_irq, 112 .irq_mask = disable_microdev_irq, 113 }; 114 115 /* This function sets the desired irq handler to be a MicroDev type */ 116 static void __init make_microdev_irq(unsigned int irq) 117 { 118 disable_irq_nosync(irq); 119 irq_set_chip_and_handler(irq, µdev_irq_type, handle_level_irq); 120 disable_microdev_irq(irq_get_irq_data(irq)); 121 } 122 123 extern void __init init_microdev_irq(void) 124 { 125 int i; 126 127 /* disable interrupts on the FPGA INTC register */ 128 __raw_writel(~0ul, MICRODEV_FPGA_INTDSB_REG); 129 130 for (i = 0; i < NUM_EXTERNAL_IRQS; i++) 131 make_microdev_irq(i); 132 } 133 134 extern void microdev_print_fpga_intc_status(void) 135 { 136 volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG; 137 volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG; 138 volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0); 139 volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8); 140 volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16); 141 volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24); 142 volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG; 143 volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG; 144 145 printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n"); 146 printk("FPGA_INTENB = 0x%08x\n", *intenb); 147 printk("FPGA_INTDSB = 0x%08x\n", *intdsb); 148 printk("FPGA_INTSRC = 0x%08x\n", *intsrc); 149 printk("FPGA_INTREQ = 0x%08x\n", *intreq); 150 printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", *intprid, *intpric, *intprib, *intpria); 151 printk("-------------------------------------------------------------------------------\n"); 152 } 153