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x86: Move call to print_modules() out of show_regs()
[deliverable/linux.git] / arch / arm / mach-mmp / irq.c
1 /*
2 * linux/arch/arm/mach-mmp/irq.c
3 *
4 * Generic IRQ handling, GPIO IRQ demultiplexing, etc.
5 * Copyright (C) 2008 - 2012 Marvell Technology Group Ltd.
6 *
7 * Author: Bin Yang <bin.yang@marvell.com>
8 * Haojian Zhuang <haojian.zhuang@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/irq.h>
18 #include <linux/irqdomain.h>
19 #include <linux/io.h>
20 #include <linux/ioport.h>
21 #include <linux/of_address.h>
22 #include <linux/of_irq.h>
23
24 #include <mach/irqs.h>
25
26 #ifdef CONFIG_CPU_MMP2
27 #include <mach/pm-mmp2.h>
28 #endif
29 #ifdef CONFIG_CPU_PXA910
30 #include <mach/pm-pxa910.h>
31 #endif
32
33 #include "common.h"
34
35 #define MAX_ICU_NR 16
36
37 struct icu_chip_data {
38 int nr_irqs;
39 unsigned int virq_base;
40 unsigned int cascade_irq;
41 void __iomem *reg_status;
42 void __iomem *reg_mask;
43 unsigned int conf_enable;
44 unsigned int conf_disable;
45 unsigned int conf_mask;
46 unsigned int clr_mfp_irq_base;
47 unsigned int clr_mfp_hwirq;
48 struct irq_domain *domain;
49 };
50
51 struct mmp_intc_conf {
52 unsigned int conf_enable;
53 unsigned int conf_disable;
54 unsigned int conf_mask;
55 };
56
57 void __iomem *mmp_icu_base;
58 static struct icu_chip_data icu_data[MAX_ICU_NR];
59 static int max_icu_nr;
60
61 extern void mmp2_clear_pmic_int(void);
62
63 static void icu_mask_ack_irq(struct irq_data *d)
64 {
65 struct irq_domain *domain = d->domain;
66 struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
67 int hwirq;
68 u32 r;
69
70 hwirq = d->irq - data->virq_base;
71 if (data == &icu_data[0]) {
72 r = readl_relaxed(mmp_icu_base + (hwirq << 2));
73 r &= ~data->conf_mask;
74 r |= data->conf_disable;
75 writel_relaxed(r, mmp_icu_base + (hwirq << 2));
76 } else {
77 #ifdef CONFIG_CPU_MMP2
78 if ((data->virq_base == data->clr_mfp_irq_base)
79 && (hwirq == data->clr_mfp_hwirq))
80 mmp2_clear_pmic_int();
81 #endif
82 r = readl_relaxed(data->reg_mask) | (1 << hwirq);
83 writel_relaxed(r, data->reg_mask);
84 }
85 }
86
87 static void icu_mask_irq(struct irq_data *d)
88 {
89 struct irq_domain *domain = d->domain;
90 struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
91 int hwirq;
92 u32 r;
93
94 hwirq = d->irq - data->virq_base;
95 if (data == &icu_data[0]) {
96 r = readl_relaxed(mmp_icu_base + (hwirq << 2));
97 r &= ~data->conf_mask;
98 r |= data->conf_disable;
99 writel_relaxed(r, mmp_icu_base + (hwirq << 2));
100 } else {
101 r = readl_relaxed(data->reg_mask) | (1 << hwirq);
102 writel_relaxed(r, data->reg_mask);
103 }
104 }
105
106 static void icu_unmask_irq(struct irq_data *d)
107 {
108 struct irq_domain *domain = d->domain;
109 struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
110 int hwirq;
111 u32 r;
112
113 hwirq = d->irq - data->virq_base;
114 if (data == &icu_data[0]) {
115 r = readl_relaxed(mmp_icu_base + (hwirq << 2));
116 r &= ~data->conf_mask;
117 r |= data->conf_enable;
118 writel_relaxed(r, mmp_icu_base + (hwirq << 2));
119 } else {
120 r = readl_relaxed(data->reg_mask) & ~(1 << hwirq);
121 writel_relaxed(r, data->reg_mask);
122 }
123 }
124
125 static struct irq_chip icu_irq_chip = {
126 .name = "icu_irq",
127 .irq_mask = icu_mask_irq,
128 .irq_mask_ack = icu_mask_ack_irq,
129 .irq_unmask = icu_unmask_irq,
130 };
131
132 static void icu_mux_irq_demux(unsigned int irq, struct irq_desc *desc)
133 {
134 struct irq_domain *domain;
135 struct icu_chip_data *data;
136 int i;
137 unsigned long mask, status, n;
138
139 for (i = 1; i < max_icu_nr; i++) {
140 if (irq == icu_data[i].cascade_irq) {
141 domain = icu_data[i].domain;
142 data = (struct icu_chip_data *)domain->host_data;
143 break;
144 }
145 }
146 if (i >= max_icu_nr) {
147 pr_err("Spurious irq %d in MMP INTC\n", irq);
148 return;
149 }
150
151 mask = readl_relaxed(data->reg_mask);
152 while (1) {
153 status = readl_relaxed(data->reg_status) & ~mask;
154 if (status == 0)
155 break;
156 n = find_first_bit(&status, BITS_PER_LONG);
157 while (n < BITS_PER_LONG) {
158 generic_handle_irq(icu_data[i].virq_base + n);
159 n = find_next_bit(&status, BITS_PER_LONG, n + 1);
160 }
161 }
162 }
163
164 static int mmp_irq_domain_map(struct irq_domain *d, unsigned int irq,
165 irq_hw_number_t hw)
166 {
167 irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
168 set_irq_flags(irq, IRQF_VALID);
169 return 0;
170 }
171
172 static int mmp_irq_domain_xlate(struct irq_domain *d, struct device_node *node,
173 const u32 *intspec, unsigned int intsize,
174 unsigned long *out_hwirq,
175 unsigned int *out_type)
176 {
177 *out_hwirq = intspec[0];
178 return 0;
179 }
180
181 const struct irq_domain_ops mmp_irq_domain_ops = {
182 .map = mmp_irq_domain_map,
183 .xlate = mmp_irq_domain_xlate,
184 };
185
186 static struct mmp_intc_conf mmp_conf = {
187 .conf_enable = 0x51,
188 .conf_disable = 0x0,
189 .conf_mask = 0x7f,
190 };
191
192 static struct mmp_intc_conf mmp2_conf = {
193 .conf_enable = 0x20,
194 .conf_disable = 0x0,
195 .conf_mask = 0x7f,
196 };
197
198 /* MMP (ARMv5) */
199 void __init icu_init_irq(void)
200 {
201 int irq;
202
203 max_icu_nr = 1;
204 mmp_icu_base = ioremap(0xd4282000, 0x1000);
205 icu_data[0].conf_enable = mmp_conf.conf_enable;
206 icu_data[0].conf_disable = mmp_conf.conf_disable;
207 icu_data[0].conf_mask = mmp_conf.conf_mask;
208 icu_data[0].nr_irqs = 64;
209 icu_data[0].virq_base = 0;
210 icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0,
211 &irq_domain_simple_ops,
212 &icu_data[0]);
213 for (irq = 0; irq < 64; irq++) {
214 icu_mask_irq(irq_get_irq_data(irq));
215 irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
216 set_irq_flags(irq, IRQF_VALID);
217 }
218 irq_set_default_host(icu_data[0].domain);
219 #ifdef CONFIG_CPU_PXA910
220 icu_irq_chip.irq_set_wake = pxa910_set_wake;
221 #endif
222 }
223
224 /* MMP2 (ARMv7) */
225 void __init mmp2_init_icu(void)
226 {
227 int irq;
228
229 max_icu_nr = 8;
230 mmp_icu_base = ioremap(0xd4282000, 0x1000);
231 icu_data[0].conf_enable = mmp2_conf.conf_enable;
232 icu_data[0].conf_disable = mmp2_conf.conf_disable;
233 icu_data[0].conf_mask = mmp2_conf.conf_mask;
234 icu_data[0].nr_irqs = 64;
235 icu_data[0].virq_base = 0;
236 icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0,
237 &irq_domain_simple_ops,
238 &icu_data[0]);
239 icu_data[1].reg_status = mmp_icu_base + 0x150;
240 icu_data[1].reg_mask = mmp_icu_base + 0x168;
241 icu_data[1].clr_mfp_irq_base = IRQ_MMP2_PMIC_BASE;
242 icu_data[1].clr_mfp_hwirq = IRQ_MMP2_PMIC - IRQ_MMP2_PMIC_BASE;
243 icu_data[1].nr_irqs = 2;
244 icu_data[1].virq_base = IRQ_MMP2_PMIC_BASE;
245 icu_data[1].domain = irq_domain_add_legacy(NULL, icu_data[1].nr_irqs,
246 icu_data[1].virq_base, 0,
247 &irq_domain_simple_ops,
248 &icu_data[1]);
249 icu_data[2].reg_status = mmp_icu_base + 0x154;
250 icu_data[2].reg_mask = mmp_icu_base + 0x16c;
251 icu_data[2].nr_irqs = 2;
252 icu_data[2].virq_base = IRQ_MMP2_RTC_BASE;
253 icu_data[2].domain = irq_domain_add_legacy(NULL, icu_data[2].nr_irqs,
254 icu_data[2].virq_base, 0,
255 &irq_domain_simple_ops,
256 &icu_data[2]);
257 icu_data[3].reg_status = mmp_icu_base + 0x180;
258 icu_data[3].reg_mask = mmp_icu_base + 0x17c;
259 icu_data[3].nr_irqs = 3;
260 icu_data[3].virq_base = IRQ_MMP2_KEYPAD_BASE;
261 icu_data[3].domain = irq_domain_add_legacy(NULL, icu_data[3].nr_irqs,
262 icu_data[3].virq_base, 0,
263 &irq_domain_simple_ops,
264 &icu_data[3]);
265 icu_data[4].reg_status = mmp_icu_base + 0x158;
266 icu_data[4].reg_mask = mmp_icu_base + 0x170;
267 icu_data[4].nr_irqs = 5;
268 icu_data[4].virq_base = IRQ_MMP2_TWSI_BASE;
269 icu_data[4].domain = irq_domain_add_legacy(NULL, icu_data[4].nr_irqs,
270 icu_data[4].virq_base, 0,
271 &irq_domain_simple_ops,
272 &icu_data[4]);
273 icu_data[5].reg_status = mmp_icu_base + 0x15c;
274 icu_data[5].reg_mask = mmp_icu_base + 0x174;
275 icu_data[5].nr_irqs = 15;
276 icu_data[5].virq_base = IRQ_MMP2_MISC_BASE;
277 icu_data[5].domain = irq_domain_add_legacy(NULL, icu_data[5].nr_irqs,
278 icu_data[5].virq_base, 0,
279 &irq_domain_simple_ops,
280 &icu_data[5]);
281 icu_data[6].reg_status = mmp_icu_base + 0x160;
282 icu_data[6].reg_mask = mmp_icu_base + 0x178;
283 icu_data[6].nr_irqs = 2;
284 icu_data[6].virq_base = IRQ_MMP2_MIPI_HSI1_BASE;
285 icu_data[6].domain = irq_domain_add_legacy(NULL, icu_data[6].nr_irqs,
286 icu_data[6].virq_base, 0,
287 &irq_domain_simple_ops,
288 &icu_data[6]);
289 icu_data[7].reg_status = mmp_icu_base + 0x188;
290 icu_data[7].reg_mask = mmp_icu_base + 0x184;
291 icu_data[7].nr_irqs = 2;
292 icu_data[7].virq_base = IRQ_MMP2_MIPI_HSI0_BASE;
293 icu_data[7].domain = irq_domain_add_legacy(NULL, icu_data[7].nr_irqs,
294 icu_data[7].virq_base, 0,
295 &irq_domain_simple_ops,
296 &icu_data[7]);
297 for (irq = 0; irq < IRQ_MMP2_MUX_END; irq++) {
298 icu_mask_irq(irq_get_irq_data(irq));
299 switch (irq) {
300 case IRQ_MMP2_PMIC_MUX:
301 case IRQ_MMP2_RTC_MUX:
302 case IRQ_MMP2_KEYPAD_MUX:
303 case IRQ_MMP2_TWSI_MUX:
304 case IRQ_MMP2_MISC_MUX:
305 case IRQ_MMP2_MIPI_HSI1_MUX:
306 case IRQ_MMP2_MIPI_HSI0_MUX:
307 irq_set_chip(irq, &icu_irq_chip);
308 irq_set_chained_handler(irq, icu_mux_irq_demux);
309 break;
310 default:
311 irq_set_chip_and_handler(irq, &icu_irq_chip,
312 handle_level_irq);
313 break;
314 }
315 set_irq_flags(irq, IRQF_VALID);
316 }
317 irq_set_default_host(icu_data[0].domain);
318 #ifdef CONFIG_CPU_MMP2
319 icu_irq_chip.irq_set_wake = mmp2_set_wake;
320 #endif
321 }
322
323 #ifdef CONFIG_OF
324 static const struct of_device_id intc_ids[] __initconst = {
325 { .compatible = "mrvl,mmp-intc", .data = &mmp_conf },
326 { .compatible = "mrvl,mmp2-intc", .data = &mmp2_conf },
327 {}
328 };
329
330 static const struct of_device_id mmp_mux_irq_match[] __initconst = {
331 { .compatible = "mrvl,mmp2-mux-intc" },
332 {}
333 };
334
335 int __init mmp2_mux_init(struct device_node *parent)
336 {
337 struct device_node *node;
338 const struct of_device_id *of_id;
339 struct resource res;
340 int i, irq_base, ret, irq;
341 u32 nr_irqs, mfp_irq;
342
343 node = parent;
344 max_icu_nr = 1;
345 for (i = 1; i < MAX_ICU_NR; i++) {
346 node = of_find_matching_node(node, mmp_mux_irq_match);
347 if (!node)
348 break;
349 of_id = of_match_node(&mmp_mux_irq_match[0], node);
350 ret = of_property_read_u32(node, "mrvl,intc-nr-irqs",
351 &nr_irqs);
352 if (ret) {
353 pr_err("Not found mrvl,intc-nr-irqs property\n");
354 ret = -EINVAL;
355 goto err;
356 }
357 ret = of_address_to_resource(node, 0, &res);
358 if (ret < 0) {
359 pr_err("Not found reg property\n");
360 ret = -EINVAL;
361 goto err;
362 }
363 icu_data[i].reg_status = mmp_icu_base + res.start;
364 ret = of_address_to_resource(node, 1, &res);
365 if (ret < 0) {
366 pr_err("Not found reg property\n");
367 ret = -EINVAL;
368 goto err;
369 }
370 icu_data[i].reg_mask = mmp_icu_base + res.start;
371 icu_data[i].cascade_irq = irq_of_parse_and_map(node, 0);
372 if (!icu_data[i].cascade_irq) {
373 ret = -EINVAL;
374 goto err;
375 }
376
377 irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
378 if (irq_base < 0) {
379 pr_err("Failed to allocate IRQ numbers for mux intc\n");
380 ret = irq_base;
381 goto err;
382 }
383 if (!of_property_read_u32(node, "mrvl,clr-mfp-irq",
384 &mfp_irq)) {
385 icu_data[i].clr_mfp_irq_base = irq_base;
386 icu_data[i].clr_mfp_hwirq = mfp_irq;
387 }
388 irq_set_chained_handler(icu_data[i].cascade_irq,
389 icu_mux_irq_demux);
390 icu_data[i].nr_irqs = nr_irqs;
391 icu_data[i].virq_base = irq_base;
392 icu_data[i].domain = irq_domain_add_legacy(node, nr_irqs,
393 irq_base, 0,
394 &mmp_irq_domain_ops,
395 &icu_data[i]);
396 for (irq = irq_base; irq < irq_base + nr_irqs; irq++)
397 icu_mask_irq(irq_get_irq_data(irq));
398 }
399 max_icu_nr = i;
400 return 0;
401 err:
402 of_node_put(node);
403 max_icu_nr = i;
404 return ret;
405 }
406
407 void __init mmp_dt_irq_init(void)
408 {
409 struct device_node *node;
410 const struct of_device_id *of_id;
411 struct mmp_intc_conf *conf;
412 int nr_irqs, irq_base, ret, irq;
413
414 node = of_find_matching_node(NULL, intc_ids);
415 if (!node) {
416 pr_err("Failed to find interrupt controller in arch-mmp\n");
417 return;
418 }
419 of_id = of_match_node(intc_ids, node);
420 conf = of_id->data;
421
422 ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", &nr_irqs);
423 if (ret) {
424 pr_err("Not found mrvl,intc-nr-irqs property\n");
425 return;
426 }
427
428 mmp_icu_base = of_iomap(node, 0);
429 if (!mmp_icu_base) {
430 pr_err("Failed to get interrupt controller register\n");
431 return;
432 }
433
434 irq_base = irq_alloc_descs(-1, 0, nr_irqs - NR_IRQS_LEGACY, 0);
435 if (irq_base < 0) {
436 pr_err("Failed to allocate IRQ numbers\n");
437 goto err;
438 } else if (irq_base != NR_IRQS_LEGACY) {
439 pr_err("ICU's irqbase should be started from 0\n");
440 goto err;
441 }
442 icu_data[0].conf_enable = conf->conf_enable;
443 icu_data[0].conf_disable = conf->conf_disable;
444 icu_data[0].conf_mask = conf->conf_mask;
445 icu_data[0].nr_irqs = nr_irqs;
446 icu_data[0].virq_base = 0;
447 icu_data[0].domain = irq_domain_add_legacy(node, nr_irqs, 0, 0,
448 &mmp_irq_domain_ops,
449 &icu_data[0]);
450 irq_set_default_host(icu_data[0].domain);
451 for (irq = 0; irq < nr_irqs; irq++)
452 icu_mask_irq(irq_get_irq_data(irq));
453 mmp2_mux_init(node);
454 return;
455 err:
456 iounmap(mmp_icu_base);
457 }
458 #endif
Linux kernel - Deliverables
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