Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Tony Lindgren | 7c38cf0 | 2005-09-08 23:07:38 +0100 | [diff] [blame] | 2 | * linux/arch/arm/mach-omap1/irq.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Interrupt handler for all OMAP boards |
| 5 | * |
| 6 | * Copyright (C) 2004 Nokia Corporation |
| 7 | * Written by Tony Lindgren <tony@atomide.com> |
| 8 | * Major cleanups by Juha Yrjölä <juha.yrjola@nokia.com> |
| 9 | * |
| 10 | * Completely re-written to support various OMAP chips with bank specific |
| 11 | * interrupt handlers. |
| 12 | * |
| 13 | * Some snippets of the code taken from the older OMAP interrupt handler |
| 14 | * Copyright (C) 2001 RidgeRun, Inc. Greg Lonnon <glonnon@ridgerun.com> |
| 15 | * |
| 16 | * GPIO interrupt handler moved to gpio.c by Juha Yrjola |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify it |
| 19 | * under the terms of the GNU General Public License as published by the |
| 20 | * Free Software Foundation; either version 2 of the License, or (at your |
| 21 | * option) any later version. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 26 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 27 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 28 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 29 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 30 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 32 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 33 | * |
| 34 | * You should have received a copy of the GNU General Public License along |
| 35 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 36 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 37 | */ |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/init.h> |
| 40 | #include <linux/module.h> |
| 41 | #include <linux/sched.h> |
| 42 | #include <linux/interrupt.h> |
| 43 | #include <linux/ptrace.h> |
| 44 | |
| 45 | #include <asm/hardware.h> |
| 46 | #include <asm/irq.h> |
| 47 | #include <asm/mach/irq.h> |
| 48 | #include <asm/arch/gpio.h> |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 49 | #include <asm/arch/cpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | #include <asm/io.h> |
| 52 | |
| 53 | #define IRQ_BANK(irq) ((irq) >> 5) |
| 54 | #define IRQ_BIT(irq) ((irq) & 0x1f) |
| 55 | |
| 56 | struct omap_irq_bank { |
| 57 | unsigned long base_reg; |
| 58 | unsigned long trigger_map; |
Tony Lindgren | 3b59b6b | 2005-07-10 19:58:09 +0100 | [diff] [blame] | 59 | unsigned long wake_enable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | }; |
| 61 | |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 62 | static unsigned int irq_bank_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | static struct omap_irq_bank *irq_banks; |
| 64 | |
| 65 | static inline unsigned int irq_bank_readl(int bank, int offset) |
| 66 | { |
| 67 | return omap_readl(irq_banks[bank].base_reg + offset); |
| 68 | } |
| 69 | |
| 70 | static inline void irq_bank_writel(unsigned long value, int bank, int offset) |
| 71 | { |
| 72 | omap_writel(value, irq_banks[bank].base_reg + offset); |
| 73 | } |
| 74 | |
| 75 | static void omap_ack_irq(unsigned int irq) |
| 76 | { |
| 77 | if (irq > 31) |
| 78 | omap_writel(0x1, OMAP_IH2_BASE + IRQ_CONTROL_REG_OFFSET); |
| 79 | |
| 80 | omap_writel(0x1, OMAP_IH1_BASE + IRQ_CONTROL_REG_OFFSET); |
| 81 | } |
| 82 | |
| 83 | static void omap_mask_irq(unsigned int irq) |
| 84 | { |
| 85 | int bank = IRQ_BANK(irq); |
| 86 | u32 l; |
| 87 | |
| 88 | l = omap_readl(irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET); |
| 89 | l |= 1 << IRQ_BIT(irq); |
| 90 | omap_writel(l, irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET); |
| 91 | } |
| 92 | |
| 93 | static void omap_unmask_irq(unsigned int irq) |
| 94 | { |
| 95 | int bank = IRQ_BANK(irq); |
| 96 | u32 l; |
| 97 | |
| 98 | l = omap_readl(irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET); |
| 99 | l &= ~(1 << IRQ_BIT(irq)); |
| 100 | omap_writel(l, irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET); |
| 101 | } |
| 102 | |
| 103 | static void omap_mask_ack_irq(unsigned int irq) |
| 104 | { |
| 105 | omap_mask_irq(irq); |
| 106 | omap_ack_irq(irq); |
| 107 | } |
| 108 | |
Tony Lindgren | 3b59b6b | 2005-07-10 19:58:09 +0100 | [diff] [blame] | 109 | static int omap_wake_irq(unsigned int irq, unsigned int enable) |
| 110 | { |
| 111 | int bank = IRQ_BANK(irq); |
| 112 | |
| 113 | if (enable) |
| 114 | irq_banks[bank].wake_enable |= IRQ_BIT(irq); |
| 115 | else |
| 116 | irq_banks[bank].wake_enable &= ~IRQ_BIT(irq); |
| 117 | |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | /* |
| 123 | * Allows tuning the IRQ type and priority |
| 124 | * |
| 125 | * NOTE: There is currently no OMAP fiq handler for Linux. Read the |
| 126 | * mailing list threads on FIQ handlers if you are planning to |
| 127 | * add a FIQ handler for OMAP. |
| 128 | */ |
| 129 | static void omap_irq_set_cfg(int irq, int fiq, int priority, int trigger) |
| 130 | { |
| 131 | signed int bank; |
| 132 | unsigned long val, offset; |
| 133 | |
| 134 | bank = IRQ_BANK(irq); |
| 135 | /* FIQ is only available on bank 0 interrupts */ |
| 136 | fiq = bank ? 0 : (fiq & 0x1); |
| 137 | val = fiq | ((priority & 0x1f) << 2) | ((trigger & 0x1) << 1); |
| 138 | offset = IRQ_ILR0_REG_OFFSET + IRQ_BIT(irq) * 0x4; |
| 139 | irq_bank_writel(val, bank, offset); |
| 140 | } |
| 141 | |
| 142 | #ifdef CONFIG_ARCH_OMAP730 |
| 143 | static struct omap_irq_bank omap730_irq_banks[] = { |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 144 | { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3f8e22f }, |
| 145 | { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xfdb9c1f2 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | { .base_reg = OMAP_IH2_BASE + 0x100, .trigger_map = 0x800040f3 }, |
| 147 | }; |
| 148 | #endif |
| 149 | |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 150 | #ifdef CONFIG_ARCH_OMAP15XX |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | static struct omap_irq_bank omap1510_irq_banks[] = { |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 152 | { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3febfff }, |
| 153 | { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xffbfffed }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | }; |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 155 | static struct omap_irq_bank omap310_irq_banks[] = { |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 156 | { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3faefc3 }, |
| 157 | { .base_reg = OMAP_IH2_BASE, .trigger_map = 0x65b3c061 }, |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 158 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | #endif |
| 160 | |
| 161 | #if defined(CONFIG_ARCH_OMAP16XX) |
| 162 | |
| 163 | static struct omap_irq_bank omap1610_irq_banks[] = { |
Tony Lindgren | 120db2c | 2006-04-02 17:46:27 +0100 | [diff] [blame] | 164 | { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3fefe8f }, |
| 165 | { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xfdb7c1fd }, |
Tony Lindgren | 3b59b6b | 2005-07-10 19:58:09 +0100 | [diff] [blame] | 166 | { .base_reg = OMAP_IH2_BASE + 0x100, .trigger_map = 0xffffb7ff }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { .base_reg = OMAP_IH2_BASE + 0x200, .trigger_map = 0xffffffff }, |
| 168 | }; |
| 169 | #endif |
| 170 | |
David Brownell | 38c677c | 2006-08-01 22:26:25 +0100 | [diff] [blame] | 171 | static struct irq_chip omap_irq_chip = { |
| 172 | .name = "MPU", |
Russell King | 2be863c | 2005-09-06 23:13:17 +0100 | [diff] [blame] | 173 | .ack = omap_mask_ack_irq, |
| 174 | .mask = omap_mask_irq, |
| 175 | .unmask = omap_unmask_irq, |
| 176 | .set_wake = omap_wake_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | }; |
| 178 | |
| 179 | void __init omap_init_irq(void) |
| 180 | { |
| 181 | int i, j; |
| 182 | |
| 183 | #ifdef CONFIG_ARCH_OMAP730 |
| 184 | if (cpu_is_omap730()) { |
| 185 | irq_banks = omap730_irq_banks; |
| 186 | irq_bank_count = ARRAY_SIZE(omap730_irq_banks); |
| 187 | } |
| 188 | #endif |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 189 | #ifdef CONFIG_ARCH_OMAP15XX |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (cpu_is_omap1510()) { |
| 191 | irq_banks = omap1510_irq_banks; |
| 192 | irq_bank_count = ARRAY_SIZE(omap1510_irq_banks); |
| 193 | } |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 194 | if (cpu_is_omap310()) { |
| 195 | irq_banks = omap310_irq_banks; |
| 196 | irq_bank_count = ARRAY_SIZE(omap310_irq_banks); |
| 197 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | #endif |
| 199 | #if defined(CONFIG_ARCH_OMAP16XX) |
| 200 | if (cpu_is_omap16xx()) { |
| 201 | irq_banks = omap1610_irq_banks; |
| 202 | irq_bank_count = ARRAY_SIZE(omap1610_irq_banks); |
| 203 | } |
| 204 | #endif |
| 205 | printk("Total of %i interrupts in %i interrupt banks\n", |
| 206 | irq_bank_count * 32, irq_bank_count); |
| 207 | |
| 208 | /* Mask and clear all interrupts */ |
| 209 | for (i = 0; i < irq_bank_count; i++) { |
| 210 | irq_bank_writel(~0x0, i, IRQ_MIR_REG_OFFSET); |
| 211 | irq_bank_writel(0x0, i, IRQ_ITR_REG_OFFSET); |
| 212 | } |
| 213 | |
| 214 | /* Clear any pending interrupts */ |
| 215 | irq_bank_writel(0x03, 0, IRQ_CONTROL_REG_OFFSET); |
| 216 | irq_bank_writel(0x03, 1, IRQ_CONTROL_REG_OFFSET); |
| 217 | |
| 218 | /* Enable interrupts in global mask */ |
| 219 | if (cpu_is_omap730()) { |
| 220 | irq_bank_writel(0x0, 0, IRQ_GMR_REG_OFFSET); |
| 221 | } |
| 222 | |
| 223 | /* Install the interrupt handlers for each bank */ |
| 224 | for (i = 0; i < irq_bank_count; i++) { |
| 225 | for (j = i * 32; j < (i + 1) * 32; j++) { |
| 226 | int irq_trigger; |
| 227 | |
| 228 | irq_trigger = irq_banks[i].trigger_map >> IRQ_BIT(j); |
| 229 | omap_irq_set_cfg(j, 0, 0, irq_trigger); |
| 230 | |
| 231 | set_irq_chip(j, &omap_irq_chip); |
Russell King | 10dd5ce | 2006-11-23 11:41:32 +0000 | [diff] [blame] | 232 | set_irq_handler(j, handle_level_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | set_irq_flags(j, IRQF_VALID); |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | /* Unmask level 2 handler */ |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 238 | |
| 239 | if (cpu_is_omap730()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | omap_unmask_irq(INT_730_IH2_IRQ); |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 241 | else if (cpu_is_omap1510()) |
| 242 | omap_unmask_irq(INT_1510_IH2_IRQ); |
| 243 | else if (cpu_is_omap16xx()) |
| 244 | omap_unmask_irq(INT_1610_IH2_IRQ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |