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 21 static 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_IDE1 != 14) 65 # error Inconsistancy in defining the IRQ# for primary IDE! 66 #endif 67 68 static void disable_microdev_irq(struct irq_data *data) 69 { 70 unsigned int irq = data->irq; 71 unsigned int fpgaIrq; 72 73 if (irq >= NUM_EXTERNAL_IRQS) 74 return; 75 if (!fpgaIrqTable[irq].mapped) 76 return; 77 78 fpgaIrq = fpgaIrqTable[irq].fpgaIrq; 79 80 /* disable interrupts on the FPGA INTC register */ 81 __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG); 82 } 83 84 static void enable_microdev_irq(struct irq_data *data) 85 { 86 unsigned int irq = data->irq; 87 unsigned long priorityReg, priorities, pri; 88 unsigned int fpgaIrq; 89 90 if (unlikely(irq >= NUM_EXTERNAL_IRQS)) 91 return; 92 if (unlikely(!fpgaIrqTable[irq].mapped)) 93 return; 94 95 pri = 15 - irq; 96 97 fpgaIrq = fpgaIrqTable[irq].fpgaIrq; 98 priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq); 99 100 /* set priority for the interrupt */ 101 priorities = __raw_readl(priorityReg); 102 priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq); 103 priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri); 104 __raw_writel(priorities, priorityReg); 105 106 /* enable interrupts on the FPGA INTC register */ 107 __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG); 108 } 109 110 static struct irq_chip microdev_irq_type = { 111 .name = "MicroDev-IRQ", 112 .irq_unmask = enable_microdev_irq, 113 .irq_mask = disable_microdev_irq, 114 }; 115 116 /* This function sets the desired irq handler to be a MicroDev type */ 117 static void __init make_microdev_irq(unsigned int irq) 118 { 119 disable_irq_nosync(irq); 120 set_irq_chip_and_handler(irq, µdev_irq_type, handle_level_irq); 121 disable_microdev_irq(irq_get_irq_data(irq)); 122 } 123 124 extern void __init init_microdev_irq(void) 125 { 126 int i; 127 128 /* disable interrupts on the FPGA INTC register */ 129 __raw_writel(~0ul, MICRODEV_FPGA_INTDSB_REG); 130 131 for (i = 0; i < NUM_EXTERNAL_IRQS; i++) 132 make_microdev_irq(i); 133 } 134 135 extern void microdev_print_fpga_intc_status(void) 136 { 137 volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG; 138 volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG; 139 volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0); 140 volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8); 141 volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16); 142 volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24); 143 volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG; 144 volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG; 145 146 printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n"); 147 printk("FPGA_INTENB = 0x%08x\n", *intenb); 148 printk("FPGA_INTDSB = 0x%08x\n", *intdsb); 149 printk("FPGA_INTSRC = 0x%08x\n", *intsrc); 150 printk("FPGA_INTREQ = 0x%08x\n", *intreq); 151 printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", *intprid, *intpric, *intprib, *intpria); 152 printk("-------------------------------------------------------------------------------\n"); 153 } 154