2 * linux/arch/arm/mach-omap1/irq.c
4 * Interrupt handler for all OMAP boards
6 * Copyright (C) 2004 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
8 * Major cleanups by Juha Yrjölä <juha.yrjola@nokia.com>
10 * Completely re-written to support various OMAP chips with bank specific
13 * Some snippets of the code taken from the older OMAP interrupt handler
14 * Copyright (C) 2001 RidgeRun, Inc. Greg Lonnon <glonnon@ridgerun.com>
16 * GPIO interrupt handler moved to gpio.c by Juha Yrjola
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.
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.
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.
39 #include <linux/init.h>
40 #include <linux/module.h>
41 #include <linux/sched.h>
42 #include <linux/interrupt.h>
45 #include <mach/hardware.h>
47 #include <asm/mach/irq.h>
48 #include <mach/gpio.h>
51 #define IRQ_BANK(irq) ((irq) >> 5)
52 #define IRQ_BIT(irq) ((irq) & 0x1f)
54 struct omap_irq_bank {
55 unsigned long base_reg;
56 unsigned long trigger_map;
57 unsigned long wake_enable;
60 static unsigned int irq_bank_count;
61 static struct omap_irq_bank *irq_banks;
63 static inline unsigned int irq_bank_readl(int bank, int offset)
65 return omap_readl(irq_banks[bank].base_reg + offset);
68 static inline void irq_bank_writel(unsigned long value, int bank, int offset)
70 omap_writel(value, irq_banks[bank].base_reg + offset);
73 static void omap_ack_irq(struct irq_data *d)
76 omap_writel(0x1, OMAP_IH2_BASE + IRQ_CONTROL_REG_OFFSET);
78 omap_writel(0x1, OMAP_IH1_BASE + IRQ_CONTROL_REG_OFFSET);
81 static void omap_mask_irq(struct irq_data *d)
83 int bank = IRQ_BANK(d->irq);
86 l = omap_readl(irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
87 l |= 1 << IRQ_BIT(d->irq);
88 omap_writel(l, irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
91 static void omap_unmask_irq(struct irq_data *d)
93 int bank = IRQ_BANK(d->irq);
96 l = omap_readl(irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
97 l &= ~(1 << IRQ_BIT(d->irq));
98 omap_writel(l, irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
101 static void omap_mask_ack_irq(struct irq_data *d)
107 static int omap_wake_irq(struct irq_data *d, unsigned int enable)
109 int bank = IRQ_BANK(d->irq);
112 irq_banks[bank].wake_enable |= IRQ_BIT(d->irq);
114 irq_banks[bank].wake_enable &= ~IRQ_BIT(d->irq);
121 * Allows tuning the IRQ type and priority
123 * NOTE: There is currently no OMAP fiq handler for Linux. Read the
124 * mailing list threads on FIQ handlers if you are planning to
125 * add a FIQ handler for OMAP.
127 static void omap_irq_set_cfg(int irq, int fiq, int priority, int trigger)
130 unsigned long val, offset;
132 bank = IRQ_BANK(irq);
133 /* FIQ is only available on bank 0 interrupts */
134 fiq = bank ? 0 : (fiq & 0x1);
135 val = fiq | ((priority & 0x1f) << 2) | ((trigger & 0x1) << 1);
136 offset = IRQ_ILR0_REG_OFFSET + IRQ_BIT(irq) * 0x4;
137 irq_bank_writel(val, bank, offset);
140 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
141 static struct omap_irq_bank omap7xx_irq_banks[] = {
142 { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3f8e22f },
143 { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xfdb9c1f2 },
144 { .base_reg = OMAP_IH2_BASE + 0x100, .trigger_map = 0x800040f3 },
148 #ifdef CONFIG_ARCH_OMAP15XX
149 static struct omap_irq_bank omap1510_irq_banks[] = {
150 { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3febfff },
151 { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xffbfffed },
153 static struct omap_irq_bank omap310_irq_banks[] = {
154 { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3faefc3 },
155 { .base_reg = OMAP_IH2_BASE, .trigger_map = 0x65b3c061 },
159 #if defined(CONFIG_ARCH_OMAP16XX)
161 static struct omap_irq_bank omap1610_irq_banks[] = {
162 { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3fefe8f },
163 { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xfdb7c1fd },
164 { .base_reg = OMAP_IH2_BASE + 0x100, .trigger_map = 0xffffb7ff },
165 { .base_reg = OMAP_IH2_BASE + 0x200, .trigger_map = 0xffffffff },
169 static struct irq_chip omap_irq_chip = {
171 .irq_ack = omap_mask_ack_irq,
172 .irq_mask = omap_mask_irq,
173 .irq_unmask = omap_unmask_irq,
174 .irq_set_wake = omap_wake_irq,
177 void __init omap_init_irq(void)
179 extern unsigned int omap_irq_flags;
182 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
183 if (cpu_is_omap7xx()) {
184 omap_irq_flags = INT_7XX_IH2_IRQ;
185 irq_banks = omap7xx_irq_banks;
186 irq_bank_count = ARRAY_SIZE(omap7xx_irq_banks);
189 #ifdef CONFIG_ARCH_OMAP15XX
190 if (cpu_is_omap1510()) {
191 omap_irq_flags = INT_1510_IH2_IRQ;
192 irq_banks = omap1510_irq_banks;
193 irq_bank_count = ARRAY_SIZE(omap1510_irq_banks);
195 if (cpu_is_omap310()) {
196 omap_irq_flags = INT_1510_IH2_IRQ;
197 irq_banks = omap310_irq_banks;
198 irq_bank_count = ARRAY_SIZE(omap310_irq_banks);
201 #if defined(CONFIG_ARCH_OMAP16XX)
202 if (cpu_is_omap16xx()) {
203 omap_irq_flags = INT_1510_IH2_IRQ;
204 irq_banks = omap1610_irq_banks;
205 irq_bank_count = ARRAY_SIZE(omap1610_irq_banks);
208 printk("Total of %i interrupts in %i interrupt banks\n",
209 irq_bank_count * 32, irq_bank_count);
211 /* Mask and clear all interrupts */
212 for (i = 0; i < irq_bank_count; i++) {
213 irq_bank_writel(~0x0, i, IRQ_MIR_REG_OFFSET);
214 irq_bank_writel(0x0, i, IRQ_ITR_REG_OFFSET);
217 /* Clear any pending interrupts */
218 irq_bank_writel(0x03, 0, IRQ_CONTROL_REG_OFFSET);
219 irq_bank_writel(0x03, 1, IRQ_CONTROL_REG_OFFSET);
221 /* Enable interrupts in global mask */
222 if (cpu_is_omap7xx())
223 irq_bank_writel(0x0, 0, IRQ_GMR_REG_OFFSET);
225 /* Install the interrupt handlers for each bank */
226 for (i = 0; i < irq_bank_count; i++) {
227 for (j = i * 32; j < (i + 1) * 32; j++) {
230 irq_trigger = irq_banks[i].trigger_map >> IRQ_BIT(j);
231 omap_irq_set_cfg(j, 0, 0, irq_trigger);
233 set_irq_chip(j, &omap_irq_chip);
234 set_irq_handler(j, handle_level_irq);
235 set_irq_flags(j, IRQF_VALID);
239 /* Unmask level 2 handler */
241 if (cpu_is_omap7xx())
242 omap_unmask_irq(irq_get_irq_data(INT_7XX_IH2_IRQ));
243 else if (cpu_is_omap15xx())
244 omap_unmask_irq(irq_get_irq_data(INT_1510_IH2_IRQ));
245 else if (cpu_is_omap16xx())
246 omap_unmask_irq(irq_get_irq_data(INT_1610_IH2_IRQ));