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[net-next-2.6.git] / arch / mips / emma / markeins / irq.c
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355c471f 1/*
355c471f 2 * Copyright (C) NEC Electronics Corporation 2004-2006
3 *
4 * This file is based on the arch/mips/ddb5xxx/ddb5477/irq.c
5 *
6 * Copyright 2001 MontaVista Software Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
355c471f 22#include <linux/init.h>
23#include <linux/interrupt.h>
24#include <linux/irq.h>
25#include <linux/types.h>
26#include <linux/ptrace.h>
27#include <linux/delay.h>
28
355c471f 29#include <asm/irq_cpu.h>
30#include <asm/system.h>
31#include <asm/mipsregs.h>
355c471f 32#include <asm/addrspace.h>
33#include <asm/bootinfo.h>
34
d91f2cbe 35#include <asm/emma/emma2rh.h>
355c471f 36
49618d65 37static void emma2rh_irq_enable(unsigned int irq)
9ae9fd79
SK		 38{
39 u32 reg_value;
40 u32 reg_bitmask;
41 u32 reg_index;
42
49618d65
SK		 43 irq -= EMMA2RH_IRQ_BASE;
44
9ae9fd79 45 reg_index = EMMA2RH_BHIF_INT_EN_0 +
49618d65 46 (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0) * (irq / 32);
9ae9fd79 47 reg_value = emma2rh_in32(reg_index);
49618d65 48 reg_bitmask = 0x1 << (irq % 32);
9ae9fd79
SK		 49 emma2rh_out32(reg_index, reg_value | reg_bitmask);
50}
51
49618d65 52static void emma2rh_irq_disable(unsigned int irq)
9ae9fd79
SK		 53{
54 u32 reg_value;
55 u32 reg_bitmask;
56 u32 reg_index;
57
49618d65
SK		 58 irq -= EMMA2RH_IRQ_BASE;
59
9ae9fd79 60 reg_index = EMMA2RH_BHIF_INT_EN_0 +
49618d65 61 (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0) * (irq / 32);
9ae9fd79 62 reg_value = emma2rh_in32(reg_index);
49618d65 63 reg_bitmask = 0x1 << (irq % 32);
9ae9fd79
SK		 64 emma2rh_out32(reg_index, reg_value & ~reg_bitmask);
65}
66
9ae9fd79
SK		 67struct irq_chip emma2rh_irq_controller = {
68 .name = "emma2rh_irq",
69 .ack = emma2rh_irq_disable,
70 .mask = emma2rh_irq_disable,
71 .mask_ack = emma2rh_irq_disable,
72 .unmask = emma2rh_irq_enable,
73};
74
75void emma2rh_irq_init(void)
76{
77 u32 i;
78
79 for (i = 0; i < NUM_EMMA2RH_IRQ; i++)
ae3c1d37
SK		 80 set_irq_chip_and_handler_name(EMMA2RH_IRQ_BASE + i,
81 &emma2rh_irq_controller,
82 handle_level_irq, "level");
9ae9fd79
SK		 83}
84
49618d65 85static void emma2rh_sw_irq_enable(unsigned int irq)
9ae9fd79
SK		 86{
87 u32 reg;
88
49618d65
SK		 89 irq -= EMMA2RH_SW_IRQ_BASE;
90
9ae9fd79
SK		 91 reg = emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
92 reg |= 1 << irq;
93 emma2rh_out32(EMMA2RH_BHIF_SW_INT_EN, reg);
94}
95
49618d65 96static void emma2rh_sw_irq_disable(unsigned int irq)
9ae9fd79
SK		 97{
98 u32 reg;
99
49618d65
SK		 100 irq -= EMMA2RH_SW_IRQ_BASE;
101
9ae9fd79
SK		 102 reg = emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
103 reg &= ~(1 << irq);
104 emma2rh_out32(EMMA2RH_BHIF_SW_INT_EN, reg);
105}
106
9ae9fd79
SK		 107struct irq_chip emma2rh_sw_irq_controller = {
108 .name = "emma2rh_sw_irq",
109 .ack = emma2rh_sw_irq_disable,
110 .mask = emma2rh_sw_irq_disable,
111 .mask_ack = emma2rh_sw_irq_disable,
112 .unmask = emma2rh_sw_irq_enable,
113};
114
115void emma2rh_sw_irq_init(void)
116{
117 u32 i;
118
119 for (i = 0; i < NUM_EMMA2RH_IRQ_SW; i++)
ae3c1d37
SK		 120 set_irq_chip_and_handler_name(EMMA2RH_SW_IRQ_BASE + i,
121 &emma2rh_sw_irq_controller,
122 handle_level_irq, "level");
9ae9fd79
SK		 123}
124
49618d65 125static void emma2rh_gpio_irq_enable(unsigned int irq)
9ae9fd79
SK		 126{
127 u32 reg;
128
49618d65
SK		 129 irq -= EMMA2RH_GPIO_IRQ_BASE;
130
9ae9fd79
SK		 131 reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
132 reg |= 1 << irq;
133 emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg);
134}
135
49618d65 136static void emma2rh_gpio_irq_disable(unsigned int irq)
9ae9fd79
SK		 137{
138 u32 reg;
139
49618d65
SK		 140 irq -= EMMA2RH_GPIO_IRQ_BASE;
141
9ae9fd79
SK		 142 reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
143 reg &= ~(1 << irq);
144 emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg);
145}
146
9ae9fd79
SK		 147static void emma2rh_gpio_irq_ack(unsigned int irq)
148{
149 irq -= EMMA2RH_GPIO_IRQ_BASE;
150 emma2rh_out32(EMMA2RH_GPIO_INT_ST, ~(1 << irq));
9ae9fd79
SK		 151}
152
8da55bb2 153static void emma2rh_gpio_irq_mask_ack(unsigned int irq)
9ae9fd79 154{
49618d65
SK		 155 u32 reg;
156
8da55bb2
SK		 157 irq -= EMMA2RH_GPIO_IRQ_BASE;
158 emma2rh_out32(EMMA2RH_GPIO_INT_ST, ~(1 << irq));
49618d65 159
8da55bb2
SK		 160 reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
161 reg &= ~(1 << irq);
162 emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg);
9ae9fd79
SK		 163}
164
165struct irq_chip emma2rh_gpio_irq_controller = {
166 .name = "emma2rh_gpio_irq",
167 .ack = emma2rh_gpio_irq_ack,
168 .mask = emma2rh_gpio_irq_disable,
8da55bb2 169 .mask_ack = emma2rh_gpio_irq_mask_ack,
9ae9fd79 170 .unmask = emma2rh_gpio_irq_enable,
9ae9fd79
SK		 171};
172
173void emma2rh_gpio_irq_init(void)
174{
175 u32 i;
176
177 for (i = 0; i < NUM_EMMA2RH_IRQ_GPIO; i++)
8da55bb2
SK		 178 set_irq_chip_and_handler_name(EMMA2RH_GPIO_IRQ_BASE + i,
179 &emma2rh_gpio_irq_controller,
180 handle_edge_irq, "edge");
9ae9fd79 181}
355c471f 182
183static struct irqaction irq_cascade = {
184 .handler = no_action,
185 .flags = 0,
355c471f 186 .name = "cascade",
187 .dev_id = NULL,
188 .next = NULL,
189};
190
9ae9fd79
SK		 191/*
192 * the first level int-handler will jump here if it is a emma2rh irq
193 */
194void emma2rh_irq_dispatch(void)
195{
196 u32 intStatus;
197 u32 bitmask;
198 u32 i;
199
200 intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_0) &
201 emma2rh_in32(EMMA2RH_BHIF_INT_EN_0);
202
203#ifdef EMMA2RH_SW_CASCADE
fb2826b7 204 if (intStatus & (1UL << EMMA2RH_SW_CASCADE)) {
9ae9fd79
SK		 205 u32 swIntStatus;
206 swIntStatus = emma2rh_in32(EMMA2RH_BHIF_SW_INT)
207 & emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
208 for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
209 if (swIntStatus & bitmask) {
210 do_IRQ(EMMA2RH_SW_IRQ_BASE + i);
211 return;
212 }
213 }
214 }
fb2826b7
SK		 215 /* Skip S/W interrupt */
216 intStatus &= ~(1UL << EMMA2RH_SW_CASCADE);
9ae9fd79
SK		 217#endif
218
219 for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
220 if (intStatus & bitmask) {
221 do_IRQ(EMMA2RH_IRQ_BASE + i);
222 return;
223 }
224 }
225
226 intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_1) &
227 emma2rh_in32(EMMA2RH_BHIF_INT_EN_1);
228
229#ifdef EMMA2RH_GPIO_CASCADE
fb2826b7 230 if (intStatus & (1UL << (EMMA2RH_GPIO_CASCADE % 32))) {
9ae9fd79
SK		 231 u32 gpioIntStatus;
232 gpioIntStatus = emma2rh_in32(EMMA2RH_GPIO_INT_ST)
233 & emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
234 for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
235 if (gpioIntStatus & bitmask) {
236 do_IRQ(EMMA2RH_GPIO_IRQ_BASE + i);
237 return;
238 }
239 }
240 }
fb2826b7
SK		 241 /* Skip GPIO interrupt */
242 intStatus &= ~(1UL << (EMMA2RH_GPIO_CASCADE % 32));
9ae9fd79
SK		 243#endif
244
245 for (i = 32, bitmask = 1; i < 64; i++, bitmask <<= 1) {
246 if (intStatus & bitmask) {
247 do_IRQ(EMMA2RH_IRQ_BASE + i);
248 return;
249 }
250 }
251
252 intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_2) &
253 emma2rh_in32(EMMA2RH_BHIF_INT_EN_2);
254
255 for (i = 64, bitmask = 1; i < 96; i++, bitmask <<= 1) {
256 if (intStatus & bitmask) {
257 do_IRQ(EMMA2RH_IRQ_BASE + i);
258 return;
259 }
260 }
261}
262
355c471f 263void __init arch_init_irq(void)
264{
265 u32 reg;
266
355c471f 267 /* by default, interrupts are disabled. */
268 emma2rh_out32(EMMA2RH_BHIF_INT_EN_0, 0);
269 emma2rh_out32(EMMA2RH_BHIF_INT_EN_1, 0);
270 emma2rh_out32(EMMA2RH_BHIF_INT_EN_2, 0);
271 emma2rh_out32(EMMA2RH_BHIF_INT1_EN_0, 0);
272 emma2rh_out32(EMMA2RH_BHIF_INT1_EN_1, 0);
273 emma2rh_out32(EMMA2RH_BHIF_INT1_EN_2, 0);
274 emma2rh_out32(EMMA2RH_BHIF_SW_INT_EN, 0);
275
276 clear_c0_status(0xff00);
277 set_c0_status(0x0400);
278
279#define GPIO_PCI (0xf<<15)
280 /* setup GPIO interrupt for PCI interface */
281 /* direction input */
282 reg = emma2rh_in32(EMMA2RH_GPIO_DIR);
283 emma2rh_out32(EMMA2RH_GPIO_DIR, reg & ~GPIO_PCI);
284 /* disable interrupt */
285 reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
286 emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg & ~GPIO_PCI);
287 /* level triggerd */
288 reg = emma2rh_in32(EMMA2RH_GPIO_INT_MODE);
289 emma2rh_out32(EMMA2RH_GPIO_INT_MODE, reg | GPIO_PCI);
290 reg = emma2rh_in32(EMMA2RH_GPIO_INT_CND_A);
291 emma2rh_out32(EMMA2RH_GPIO_INT_CND_A, reg & (~GPIO_PCI));
292 /* interrupt clear */
293 emma2rh_out32(EMMA2RH_GPIO_INT_ST, ~GPIO_PCI);
294
295 /* init all controllers */
9b6c04bc 296 emma2rh_irq_init();
68ed1ca9 297 emma2rh_sw_irq_init();
fcb3cfe7 298 emma2rh_gpio_irq_init();
97dcb82d 299 mips_cpu_irq_init();
355c471f 300
301 /* setup cascade interrupts */
302 setup_irq(EMMA2RH_IRQ_BASE + EMMA2RH_SW_CASCADE, &irq_cascade);
303 setup_irq(EMMA2RH_IRQ_BASE + EMMA2RH_GPIO_CASCADE, &irq_cascade);
304 setup_irq(CPU_IRQ_BASE + CPU_EMMA2RH_CASCADE, &irq_cascade);
305}
306
937a8015 307asmlinkage void plat_irq_dispatch(void)
355c471f 308{
119537c0 309 unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
355c471f 310
311 if (pending & STATUSF_IP7)
937a8015 312 do_IRQ(CPU_IRQ_BASE + 7);
355c471f 313 else if (pending & STATUSF_IP2)
937a8015 314 emma2rh_irq_dispatch();
355c471f 315 else if (pending & STATUSF_IP1)
937a8015 316 do_IRQ(CPU_IRQ_BASE + 1);
355c471f 317 else if (pending & STATUSF_IP0)
937a8015 318 do_IRQ(CPU_IRQ_BASE + 0);
355c471f 319 else
937a8015 320 spurious_interrupt();
355c471f 321}
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