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Linux 3.11-rc3
[cris-mirror.git] / arch / arm / mach-mmp / irq.c
blob3c71246cd99459993a9b61c638cfb17f432f1159
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 for_each_set_bit(n, &status, BITS_PER_LONG) {
157 generic_handle_irq(icu_data[i].virq_base + n);
158 }
159 }
160 }
161
162 static int mmp_irq_domain_map(struct irq_domain *d, unsigned int irq,
163 irq_hw_number_t hw)
164 {
165 irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
166 set_irq_flags(irq, IRQF_VALID);
167 return 0;
168 }
169
170 static int mmp_irq_domain_xlate(struct irq_domain *d, struct device_node *node,
171 const u32 *intspec, unsigned int intsize,
172 unsigned long *out_hwirq,
173 unsigned int *out_type)
174 {
175 *out_hwirq = intspec[0];
176 return 0;
177 }
178
179 const struct irq_domain_ops mmp_irq_domain_ops = {
180 .map = mmp_irq_domain_map,
181 .xlate = mmp_irq_domain_xlate,
182 };
183
184 static struct mmp_intc_conf mmp_conf = {
185 .conf_enable = 0x51,
186 .conf_disable = 0x0,
187 .conf_mask = 0x7f,
188 };
189
190 static struct mmp_intc_conf mmp2_conf = {
191 .conf_enable = 0x20,
192 .conf_disable = 0x0,
193 .conf_mask = 0x7f,
194 };
195
196 /* MMP (ARMv5) */
197 void __init icu_init_irq(void)
198 {
199 int irq;
200
201 max_icu_nr = 1;
202 mmp_icu_base = ioremap(0xd4282000, 0x1000);
203 icu_data[0].conf_enable = mmp_conf.conf_enable;
204 icu_data[0].conf_disable = mmp_conf.conf_disable;
205 icu_data[0].conf_mask = mmp_conf.conf_mask;
206 icu_data[0].nr_irqs = 64;
207 icu_data[0].virq_base = 0;
208 icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0,
209 &irq_domain_simple_ops,
210 &icu_data[0]);
211 for (irq = 0; irq < 64; irq++) {
212 icu_mask_irq(irq_get_irq_data(irq));
213 irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
214 set_irq_flags(irq, IRQF_VALID);
215 }
216 irq_set_default_host(icu_data[0].domain);
217 #ifdef CONFIG_CPU_PXA910
218 icu_irq_chip.irq_set_wake = pxa910_set_wake;
219 #endif
220 }
221
222 /* MMP2 (ARMv7) */
223 void __init mmp2_init_icu(void)
224 {
225 int irq;
226
227 max_icu_nr = 8;
228 mmp_icu_base = ioremap(0xd4282000, 0x1000);
229 icu_data[0].conf_enable = mmp2_conf.conf_enable;
230 icu_data[0].conf_disable = mmp2_conf.conf_disable;
231 icu_data[0].conf_mask = mmp2_conf.conf_mask;
232 icu_data[0].nr_irqs = 64;
233 icu_data[0].virq_base = 0;
234 icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0,
235 &irq_domain_simple_ops,
236 &icu_data[0]);
237 icu_data[1].reg_status = mmp_icu_base + 0x150;
238 icu_data[1].reg_mask = mmp_icu_base + 0x168;
239 icu_data[1].clr_mfp_irq_base = IRQ_MMP2_PMIC_BASE;
240 icu_data[1].clr_mfp_hwirq = IRQ_MMP2_PMIC - IRQ_MMP2_PMIC_BASE;
241 icu_data[1].nr_irqs = 2;
242 icu_data[1].cascade_irq = 4;
243 icu_data[1].virq_base = IRQ_MMP2_PMIC_BASE;
244 icu_data[1].domain = irq_domain_add_legacy(NULL, icu_data[1].nr_irqs,
245 icu_data[1].virq_base, 0,
246 &irq_domain_simple_ops,
247 &icu_data[1]);
248 icu_data[2].reg_status = mmp_icu_base + 0x154;
249 icu_data[2].reg_mask = mmp_icu_base + 0x16c;
250 icu_data[2].nr_irqs = 2;
251 icu_data[2].cascade_irq = 5;
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].cascade_irq = 9;
261 icu_data[3].virq_base = IRQ_MMP2_KEYPAD_BASE;
262 icu_data[3].domain = irq_domain_add_legacy(NULL, icu_data[3].nr_irqs,
263 icu_data[3].virq_base, 0,
264 &irq_domain_simple_ops,
265 &icu_data[3]);
266 icu_data[4].reg_status = mmp_icu_base + 0x158;
267 icu_data[4].reg_mask = mmp_icu_base + 0x170;
268 icu_data[4].nr_irqs = 5;
269 icu_data[4].cascade_irq = 17;
270 icu_data[4].virq_base = IRQ_MMP2_TWSI_BASE;
271 icu_data[4].domain = irq_domain_add_legacy(NULL, icu_data[4].nr_irqs,
272 icu_data[4].virq_base, 0,
273 &irq_domain_simple_ops,
274 &icu_data[4]);
275 icu_data[5].reg_status = mmp_icu_base + 0x15c;
276 icu_data[5].reg_mask = mmp_icu_base + 0x174;
277 icu_data[5].nr_irqs = 15;
278 icu_data[5].cascade_irq = 35;
279 icu_data[5].virq_base = IRQ_MMP2_MISC_BASE;
280 icu_data[5].domain = irq_domain_add_legacy(NULL, icu_data[5].nr_irqs,
281 icu_data[5].virq_base, 0,
282 &irq_domain_simple_ops,
283 &icu_data[5]);
284 icu_data[6].reg_status = mmp_icu_base + 0x160;
285 icu_data[6].reg_mask = mmp_icu_base + 0x178;
286 icu_data[6].nr_irqs = 2;
287 icu_data[6].cascade_irq = 51;
288 icu_data[6].virq_base = IRQ_MMP2_MIPI_HSI1_BASE;
289 icu_data[6].domain = irq_domain_add_legacy(NULL, icu_data[6].nr_irqs,
290 icu_data[6].virq_base, 0,
291 &irq_domain_simple_ops,
292 &icu_data[6]);
293 icu_data[7].reg_status = mmp_icu_base + 0x188;
294 icu_data[7].reg_mask = mmp_icu_base + 0x184;
295 icu_data[7].nr_irqs = 2;
296 icu_data[7].cascade_irq = 55;
297 icu_data[7].virq_base = IRQ_MMP2_MIPI_HSI0_BASE;
298 icu_data[7].domain = irq_domain_add_legacy(NULL, icu_data[7].nr_irqs,
299 icu_data[7].virq_base, 0,
300 &irq_domain_simple_ops,
301 &icu_data[7]);
302 for (irq = 0; irq < IRQ_MMP2_MUX_END; irq++) {
303 icu_mask_irq(irq_get_irq_data(irq));
304 switch (irq) {
305 case IRQ_MMP2_PMIC_MUX:
306 case IRQ_MMP2_RTC_MUX:
307 case IRQ_MMP2_KEYPAD_MUX:
308 case IRQ_MMP2_TWSI_MUX:
309 case IRQ_MMP2_MISC_MUX:
310 case IRQ_MMP2_MIPI_HSI1_MUX:
311 case IRQ_MMP2_MIPI_HSI0_MUX:
312 irq_set_chip(irq, &icu_irq_chip);
313 irq_set_chained_handler(irq, icu_mux_irq_demux);
314 break;
315 default:
316 irq_set_chip_and_handler(irq, &icu_irq_chip,
317 handle_level_irq);
318 break;
319 }
320 set_irq_flags(irq, IRQF_VALID);
321 }
322 irq_set_default_host(icu_data[0].domain);
323 #ifdef CONFIG_CPU_MMP2
324 icu_irq_chip.irq_set_wake = mmp2_set_wake;
325 #endif
326 }
327
328 #ifdef CONFIG_OF
329 static const struct of_device_id intc_ids[] __initconst = {
330 { .compatible = "mrvl,mmp-intc", .data = &mmp_conf },
331 { .compatible = "mrvl,mmp2-intc", .data = &mmp2_conf },
332 {}
333 };
334
335 static const struct of_device_id mmp_mux_irq_match[] __initconst = {
336 { .compatible = "mrvl,mmp2-mux-intc" },
337 {}
338 };
339
340 int __init mmp2_mux_init(struct device_node *parent)
341 {
342 struct device_node *node;
343 const struct of_device_id *of_id;
344 struct resource res;
345 int i, irq_base, ret, irq;
346 u32 nr_irqs, mfp_irq;
347
348 node = parent;
349 max_icu_nr = 1;
350 for (i = 1; i < MAX_ICU_NR; i++) {
351 node = of_find_matching_node(node, mmp_mux_irq_match);
352 if (!node)
353 break;
354 of_id = of_match_node(&mmp_mux_irq_match[0], node);
355 ret = of_property_read_u32(node, "mrvl,intc-nr-irqs",
356 &nr_irqs);
357 if (ret) {
358 pr_err("Not found mrvl,intc-nr-irqs property\n");
359 ret = -EINVAL;
360 goto err;
361 }
362 ret = of_address_to_resource(node, 0, &res);
363 if (ret < 0) {
364 pr_err("Not found reg property\n");
365 ret = -EINVAL;
366 goto err;
367 }
368 icu_data[i].reg_status = mmp_icu_base + res.start;
369 ret = of_address_to_resource(node, 1, &res);
370 if (ret < 0) {
371 pr_err("Not found reg property\n");
372 ret = -EINVAL;
373 goto err;
374 }
375 icu_data[i].reg_mask = mmp_icu_base + res.start;
376 icu_data[i].cascade_irq = irq_of_parse_and_map(node, 0);
377 if (!icu_data[i].cascade_irq) {
378 ret = -EINVAL;
379 goto err;
380 }
381
382 irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
383 if (irq_base < 0) {
384 pr_err("Failed to allocate IRQ numbers for mux intc\n");
385 ret = irq_base;
386 goto err;
387 }
388 if (!of_property_read_u32(node, "mrvl,clr-mfp-irq",
389 &mfp_irq)) {
390 icu_data[i].clr_mfp_irq_base = irq_base;
391 icu_data[i].clr_mfp_hwirq = mfp_irq;
392 }
393 irq_set_chained_handler(icu_data[i].cascade_irq,
394 icu_mux_irq_demux);
395 icu_data[i].nr_irqs = nr_irqs;
396 icu_data[i].virq_base = irq_base;
397 icu_data[i].domain = irq_domain_add_legacy(node, nr_irqs,
398 irq_base, 0,
399 &mmp_irq_domain_ops,
400 &icu_data[i]);
401 for (irq = irq_base; irq < irq_base + nr_irqs; irq++)
402 icu_mask_irq(irq_get_irq_data(irq));
403 }
404 max_icu_nr = i;
405 return 0;
406 err:
407 of_node_put(node);
408 max_icu_nr = i;
409 return ret;
410 }
411
412 void __init mmp_dt_irq_init(void)
413 {
414 struct device_node *node;
415 const struct of_device_id *of_id;
416 struct mmp_intc_conf *conf;
417 int nr_irqs, irq_base, ret, irq;
418
419 node = of_find_matching_node(NULL, intc_ids);
420 if (!node) {
421 pr_err("Failed to find interrupt controller in arch-mmp\n");
422 return;
423 }
424 of_id = of_match_node(intc_ids, node);
425 conf = of_id->data;
426
427 ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", &nr_irqs);
428 if (ret) {
429 pr_err("Not found mrvl,intc-nr-irqs property\n");
430 return;
431 }
432
433 mmp_icu_base = of_iomap(node, 0);
434 if (!mmp_icu_base) {
435 pr_err("Failed to get interrupt controller register\n");
436 return;
437 }
438
439 irq_base = irq_alloc_descs(-1, 0, nr_irqs - NR_IRQS_LEGACY, 0);
440 if (irq_base < 0) {
441 pr_err("Failed to allocate IRQ numbers\n");
442 goto err;
443 } else if (irq_base != NR_IRQS_LEGACY) {
444 pr_err("ICU's irqbase should be started from 0\n");
445 goto err;
446 }
447 icu_data[0].conf_enable = conf->conf_enable;
448 icu_data[0].conf_disable = conf->conf_disable;
449 icu_data[0].conf_mask = conf->conf_mask;
450 icu_data[0].nr_irqs = nr_irqs;
451 icu_data[0].virq_base = 0;
452 icu_data[0].domain = irq_domain_add_legacy(node, nr_irqs, 0, 0,
453 &mmp_irq_domain_ops,
454 &icu_data[0]);
455 irq_set_default_host(icu_data[0].domain);
456 for (irq = 0; irq < nr_irqs; irq++)
457 icu_mask_irq(irq_get_irq_data(irq));
458 mmp2_mux_init(node);
459 return;
460 err:
461 iounmap(mmp_icu_base);
462 }
463 #endif
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