Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/init.h> |
| 13 | #include <linux/irq.h> |
Paul Mundt | 8b19a7c | 2007-06-04 10:50:42 +0900 | [diff] [blame] | 14 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <asm/io.h> |
Paul Mundt | 7639a45 | 2008-10-20 13:02:48 +0900 | [diff] [blame] | 16 | #include <mach/microdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
| 18 | #define NUM_EXTERNAL_IRQS 16 /* IRL0 .. IRL15 */ |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Paul Mundt | d613883 | 2010-10-27 14:54:10 +0900 | [diff] [blame] | 67 | static void disable_microdev_irq(struct irq_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
Paul Mundt | d613883 | 2010-10-27 14:54:10 +0900 | [diff] [blame] | 69 | unsigned int irq = data->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | unsigned int fpgaIrq; |
| 71 | |
Paul Mundt | 8599cf0 | 2006-09-27 18:03:34 +0900 | [diff] [blame] | 72 | if (irq >= NUM_EXTERNAL_IRQS) |
| 73 | return; |
| 74 | if (!fpgaIrqTable[irq].mapped) |
| 75 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | fpgaIrq = fpgaIrqTable[irq].fpgaIrq; |
| 78 | |
Simon Arlott | e868d61 | 2007-05-14 08:15:10 +0900 | [diff] [blame] | 79 | /* disable interrupts on the FPGA INTC register */ |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame] | 80 | __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | } |
| 82 | |
Paul Mundt | d613883 | 2010-10-27 14:54:10 +0900 | [diff] [blame] | 83 | static void enable_microdev_irq(struct irq_data *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
Paul Mundt | d613883 | 2010-10-27 14:54:10 +0900 | [diff] [blame] | 85 | unsigned int irq = data->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | unsigned long priorityReg, priorities, pri; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | unsigned int fpgaIrq; |
| 88 | |
Paul Mundt | 8599cf0 | 2006-09-27 18:03:34 +0900 | [diff] [blame] | 89 | if (unlikely(irq >= NUM_EXTERNAL_IRQS)) |
| 90 | return; |
| 91 | if (unlikely(!fpgaIrqTable[irq].mapped)) |
| 92 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | pri = 15 - irq; |
| 95 | |
| 96 | fpgaIrq = fpgaIrqTable[irq].fpgaIrq; |
| 97 | priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq); |
| 98 | |
Paul Mundt | 8599cf0 | 2006-09-27 18:03:34 +0900 | [diff] [blame] | 99 | /* set priority for the interrupt */ |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame] | 100 | priorities = __raw_readl(priorityReg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq); |
| 102 | priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri); |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame] | 103 | __raw_writel(priorities, priorityReg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Simon Arlott | e868d61 | 2007-05-14 08:15:10 +0900 | [diff] [blame] | 105 | /* enable interrupts on the FPGA INTC register */ |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame] | 106 | __raw_writel(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | |
Paul Mundt | d613883 | 2010-10-27 14:54:10 +0900 | [diff] [blame] | 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 | |
Matt Fleming | be729fd | 2008-12-14 12:02:24 +0000 | [diff] [blame] | 115 | /* This function sets the desired irq handler to be a MicroDev type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | static void __init make_microdev_irq(unsigned int irq) |
| 117 | { |
| 118 | disable_irq_nosync(irq); |
Thomas Gleixner | fcb8918 | 2011-03-24 16:31:17 +0100 | [diff] [blame] | 119 | irq_set_chip_and_handler(irq, µdev_irq_type, handle_level_irq); |
Paul Mundt | d613883 | 2010-10-27 14:54:10 +0900 | [diff] [blame] | 120 | disable_microdev_irq(irq_get_irq_data(irq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | extern void __init init_microdev_irq(void) |
| 124 | { |
| 125 | int i; |
| 126 | |
Matt Fleming | be729fd | 2008-12-14 12:02:24 +0000 | [diff] [blame] | 127 | /* disable interrupts on the FPGA INTC register */ |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame] | 128 | __raw_writel(~0ul, MICRODEV_FPGA_INTDSB_REG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | for (i = 0; i < NUM_EXTERNAL_IRQS; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | make_microdev_irq(i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |