aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-mmp/irq.c
blob: 3705470c9f1ecac144d0fd196f241ee75c97d1cc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
/*
 *  linux/arch/arm/mach-mmp/irq.c
 *
 *  Generic IRQ handling, GPIO IRQ demultiplexing, etc.
 *  Copyright (C) 2008 - 2012 Marvell Technology Group Ltd.
 *
 *  Author:	Bin Yang <bin.yang@marvell.com>
 *              Haojian Zhuang <haojian.zhuang@gmail.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>

#include <mach/irqs.h>

#include "common.h"

#define MAX_ICU_NR		16

struct icu_chip_data {
	int			nr_irqs;
	unsigned int		virq_base;
	unsigned int		cascade_irq;
	void __iomem		*reg_status;
	void __iomem		*reg_mask;
	unsigned int		conf_enable;
	unsigned int		conf_disable;
	unsigned int		conf_mask;
	unsigned int		clr_mfp_irq_base;
	unsigned int		clr_mfp_hwirq;
	struct irq_domain	*domain;
};

struct mmp_intc_conf {
	unsigned int	conf_enable;
	unsigned int	conf_disable;
	unsigned int	conf_mask;
};

void __iomem *mmp_icu_base;
static struct icu_chip_data icu_data[MAX_ICU_NR];
static int max_icu_nr;

extern void mmp2_clear_pmic_int(void);

static void icu_mask_ack_irq(struct irq_data *d)
{
	struct irq_domain *domain = d->domain;
	struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
	int hwirq;
	u32 r;

	hwirq = d->irq - data->virq_base;
	if (data == &icu_data[0]) {
		r = readl_relaxed(mmp_icu_base + (hwirq << 2));
		r &= ~data->conf_mask;
		r |= data->conf_disable;
		writel_relaxed(r, mmp_icu_base + (hwirq << 2));
	} else {
#ifdef CONFIG_CPU_MMP2
		if ((data->virq_base == data->clr_mfp_irq_base)
			&& (hwirq == data->clr_mfp_hwirq))
			mmp2_clear_pmic_int();
#endif
		r = readl_relaxed(data->reg_mask) | (1 << hwirq);
		writel_relaxed(r, data->reg_mask);
	}
}

static void icu_mask_irq(struct irq_data *d)
{
	struct irq_domain *domain = d->domain;
	struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
	int hwirq;
	u32 r;

	hwirq = d->irq - data->virq_base;
	if (data == &icu_data[0]) {
		r = readl_relaxed(mmp_icu_base + (hwirq << 2));
		r &= ~data->conf_mask;
		r |= data->conf_disable;
		writel_relaxed(r, mmp_icu_base + (hwirq << 2));
	} else {
		r = readl_relaxed(data->reg_mask) | (1 << hwirq);
		writel_relaxed(r, data->reg_mask);
	}
}

static void icu_unmask_irq(struct irq_data *d)
{
	struct irq_domain *domain = d->domain;
	struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
	int hwirq;
	u32 r;

	hwirq = d->irq - data->virq_base;
	if (data == &icu_data[0]) {
		r = readl_relaxed(mmp_icu_base + (hwirq << 2));
		r &= ~data->conf_mask;
		r |= data->conf_enable;
		writel_relaxed(r, mmp_icu_base + (hwirq << 2));
	} else {
		r = readl_relaxed(data->reg_mask) & ~(1 << hwirq);
		writel_relaxed(r, data->reg_mask);
	}
}

static struct irq_chip icu_irq_chip = {
	.name		= "icu_irq",
	.irq_mask	= icu_mask_irq,
	.irq_mask_ack	= icu_mask_ack_irq,
	.irq_unmask	= icu_unmask_irq,
};

static void icu_mux_irq_demux(unsigned int irq, struct irq_desc *desc)
{
	struct irq_domain *domain;
	struct icu_chip_data *data;
	int i;
	unsigned long mask, status, n;

	for (i = 1; i < max_icu_nr; i++) {
		if (irq == icu_data[i].cascade_irq) {
			domain = icu_data[i].domain;
			data = (struct icu_chip_data *)domain->host_data;
			break;
		}
	}
	if (i >= max_icu_nr) {
		pr_err("Spurious irq %d in MMP INTC\n", irq);
		return;
	}

	mask = readl_relaxed(data->reg_mask);
	while (1) {
		status = readl_relaxed(data->reg_status) & ~mask;
		if (status == 0)
			break;
		n = find_first_bit(&status, BITS_PER_LONG);
		while (n < BITS_PER_LONG) {
			generic_handle_irq(icu_data[i].virq_base + n);
			n = find_next_bit(&status, BITS_PER_LONG, n + 1);
		}
	}
}

static int mmp_irq_domain_map(struct irq_domain *d, unsigned int irq,
			      irq_hw_number_t hw)
{
	irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
	set_irq_flags(irq, IRQF_VALID);
	return 0;
}

static int mmp_irq_domain_xlate(struct irq_domain *d, struct device_node *node,
				const u32 *intspec, unsigned int intsize,
				unsigned long *out_hwirq,
				unsigned int *out_type)
{
	*out_hwirq = intspec[0];
	return 0;
}

const struct irq_domain_ops mmp_irq_domain_ops = {
	.map		= mmp_irq_domain_map,
	.xlate		= mmp_irq_domain_xlate,
};

static struct mmp_intc_conf mmp_conf = {
	.conf_enable	= 0x51,
	.conf_disable	= 0x0,
	.conf_mask	= 0x7f,
};

static struct mmp_intc_conf mmp2_conf = {
	.conf_enable	= 0x20,
	.conf_disable	= 0x0,
	.conf_mask	= 0x7f,
};

/* MMP (ARMv5) */
void __init icu_init_irq(void)
{
	int irq;

	max_icu_nr = 1;
	mmp_icu_base = ioremap(0xd4282000, 0x1000);
	icu_data[0].conf_enable = mmp_conf.conf_enable;
	icu_data[0].conf_disable = mmp_conf.conf_disable;
	icu_data[0].conf_mask = mmp_conf.conf_mask;
	icu_data[0].nr_irqs = 64;
	icu_data[0].virq_base = 0;
	icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0,
						   &irq_domain_simple_ops,
						   &icu_data[0]);
	for (irq = 0; irq < 64; irq++) {
		icu_mask_irq(irq_get_irq_data(irq));
		irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
		set_irq_flags(irq, IRQF_VALID);
	}
	irq_set_default_host(icu_data[0].domain);
}

/* MMP2 (ARMv7) */
void __init mmp2_init_icu(void)
{
	int irq;

	max_icu_nr = 8;
	mmp_icu_base = ioremap(0xd4282000, 0x1000);
	icu_data[0].conf_enable = mmp2_conf.conf_enable;
	icu_data[0].conf_disable = mmp2_conf.conf_disable;
	icu_data[0].conf_mask = mmp2_conf.conf_mask;
	icu_data[0].nr_irqs = 64;
	icu_data[0].virq_base = 0;
	icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0,
						   &irq_domain_simple_ops,
						   &icu_data[0]);
	icu_data[1].reg_status = mmp_icu_base + 0x150;
	icu_data[1].reg_mask = mmp_icu_base + 0x168;
	icu_data[1].clr_mfp_irq_base = IRQ_MMP2_PMIC_BASE;
	icu_data[1].clr_mfp_hwirq = IRQ_MMP2_PMIC - IRQ_MMP2_PMIC_BASE;
	icu_data[1].nr_irqs = 2;
	icu_data[1].virq_base = IRQ_MMP2_PMIC_BASE;
	icu_data[1].domain = irq_domain_add_legacy(NULL, icu_data[1].nr_irqs,
						   icu_data[1].virq_base, 0,
						   &irq_domain_simple_ops,
						   &icu_data[1]);
	icu_data[2].reg_status = mmp_icu_base + 0x154;
	icu_data[2].reg_mask = mmp_icu_base + 0x16c;
	icu_data[2].nr_irqs = 2;
	icu_data[2].virq_base = IRQ_MMP2_RTC_BASE;
	icu_data[2].domain = irq_domain_add_legacy(NULL, icu_data[2].nr_irqs,
						   icu_data[2].virq_base, 0,
						   &irq_domain_simple_ops,
						   &icu_data[2]);
	icu_data[3].reg_status = mmp_icu_base + 0x180;
	icu_data[3].reg_mask = mmp_icu_base + 0x17c;
	icu_data[3].nr_irqs = 3;
	icu_data[3].virq_base = IRQ_MMP2_KEYPAD_BASE;
	icu_data[3].domain = irq_domain_add_legacy(NULL, icu_data[3].nr_irqs,
						   icu_data[3].virq_base, 0,
						   &irq_domain_simple_ops,
						   &icu_data[3]);
	icu_data[4].reg_status = mmp_icu_base + 0x158;
	icu_data[4].reg_mask = mmp_icu_base + 0x170;
	icu_data[4].nr_irqs = 5;
	icu_data[4].virq_base = IRQ_MMP2_TWSI_BASE;
	icu_data[4].domain = irq_domain_add_legacy(NULL, icu_data[4].nr_irqs,
						   icu_data[4].virq_base, 0,
						   &irq_domain_simple_ops,
						   &icu_data[4]);
	icu_data[5].reg_status = mmp_icu_base + 0x15c;
	icu_data[5].reg_mask = mmp_icu_base + 0x174;
	icu_data[5].nr_irqs = 15;
	icu_data[5].virq_base = IRQ_MMP2_MISC_BASE;
	icu_data[5].domain = irq_domain_add_legacy(NULL, icu_data[5].nr_irqs,
						   icu_data[5].virq_base, 0,
						   &irq_domain_simple_ops,
						   &icu_data[5]);
	icu_data[6].reg_status = mmp_icu_base + 0x160;
	icu_data[6].reg_mask = mmp_icu_base + 0x178;
	icu_data[6].nr_irqs = 2;
	icu_data[6].virq_base = IRQ_MMP2_MIPI_HSI1_BASE;
	icu_data[6].domain = irq_domain_add_legacy(NULL, icu_data[6].nr_irqs,
						   icu_data[6].virq_base, 0,
						   &irq_domain_simple_ops,
						   &icu_data[6]);
	icu_data[7].reg_status = mmp_icu_base + 0x188;
	icu_data[7].reg_mask = mmp_icu_base + 0x184;
	icu_data[7].nr_irqs = 2;
	icu_data[7].virq_base = IRQ_MMP2_MIPI_HSI0_BASE;
	icu_data[7].domain = irq_domain_add_legacy(NULL, icu_data[7].nr_irqs,
						   icu_data[7].virq_base, 0,
						   &irq_domain_simple_ops,
						   &icu_data[7]);
	for (irq = 0; irq < IRQ_MMP2_MUX_END; irq++) {
		icu_mask_irq(irq_get_irq_data(irq));
		switch (irq) {
		case IRQ_MMP2_PMIC_MUX:
		case IRQ_MMP2_RTC_MUX:
		case IRQ_MMP2_KEYPAD_MUX:
		case IRQ_MMP2_TWSI_MUX:
		case IRQ_MMP2_MISC_MUX:
		case IRQ_MMP2_MIPI_HSI1_MUX:
		case IRQ_MMP2_MIPI_HSI0_MUX:
			irq_set_chip(irq, &icu_irq_chip);
			irq_set_chained_handler(irq, icu_mux_irq_demux);
			break;
		default:
			irq_set_chip_and_handler(irq, &icu_irq_chip,
						 handle_level_irq);
			break;
		}
		set_irq_flags(irq, IRQF_VALID);
	}
	irq_set_default_host(icu_data[0].domain);
}

#ifdef CONFIG_OF
static const struct of_device_id intc_ids[] __initconst = {
	{ .compatible = "mrvl,mmp-intc", .data = &mmp_conf },
	{ .compatible = "mrvl,mmp2-intc", .data = &mmp2_conf },
	{}
};

static const struct of_device_id mmp_mux_irq_match[] __initconst = {
	{ .compatible = "mrvl,mmp2-mux-intc" },
	{}
};

int __init mmp2_mux_init(struct device_node *parent)
{
	struct device_node *node;
	const struct of_device_id *of_id;
	struct resource res;
	int i, irq_base, ret, irq;
	u32 nr_irqs, mfp_irq;

	node = parent;
	max_icu_nr = 1;
	for (i = 1; i < MAX_ICU_NR; i++) {
		node = of_find_matching_node(node, mmp_mux_irq_match);
		if (!node)
			break;
		of_id = of_match_node(&mmp_mux_irq_match[0], node);
		ret = of_property_read_u32(node, "mrvl,intc-nr-irqs",
					   &nr_irqs);
		if (ret) {
			pr_err("Not found mrvl,intc-nr-irqs property\n");
			ret = -EINVAL;
			goto err;
		}
		ret = of_address_to_resource(node, 0, &res);
		if (ret < 0) {
			pr_err("Not found reg property\n");
			ret = -EINVAL;
			goto err;
		}
		icu_data[i].reg_status = mmp_icu_base + res.start;
		ret = of_address_to_resource(node, 1, &res);
		if (ret < 0) {
			pr_err("Not found reg property\n");
			ret = -EINVAL;
			goto err;
		}
		icu_data[i].reg_mask = mmp_icu_base + res.start;
		icu_data[i].cascade_irq = irq_of_parse_and_map(node, 0);
		if (!icu_data[i].cascade_irq) {
			ret = -EINVAL;
			goto err;
		}

		irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
		if (irq_base < 0) {
			pr_err("Failed to allocate IRQ numbers for mux intc\n");
			ret = irq_base;
			goto err;
		}
		if (!of_property_read_u32(node, "mrvl,clr-mfp-irq",
					  &mfp_irq)) {
			icu_data[i].clr_mfp_irq_base = irq_base;
			icu_data[i].clr_mfp_hwirq = mfp_irq;
		}
		irq_set_chained_handler(icu_data[i].cascade_irq,
					icu_mux_irq_demux);
		icu_data[i].nr_irqs = nr_irqs;
		icu_data[i].virq_base = irq_base;
		icu_data[i].domain = irq_domain_add_legacy(node, nr_irqs,
							   irq_base, 0,
							   &mmp_irq_domain_ops,
							   &icu_data[i]);
		for (irq = irq_base; irq < irq_base + nr_irqs; irq++)
			icu_mask_irq(irq_get_irq_data(irq));
	}
	max_icu_nr = i;
	return 0;
err:
	of_node_put(node);
	max_icu_nr = i;
	return ret;
}

void __init mmp_dt_irq_init(void)
{
	struct device_node *node;
	const struct of_device_id *of_id;
	struct mmp_intc_conf *conf;
	int nr_irqs, irq_base, ret, irq;

	node = of_find_matching_node(NULL, intc_ids);
	if (!node) {
		pr_err("Failed to find interrupt controller in arch-mmp\n");
		return;
	}
	of_id = of_match_node(intc_ids, node);
	conf = of_id->data;

	ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", &nr_irqs);
	if (ret) {
		pr_err("Not found mrvl,intc-nr-irqs property\n");
		return;
	}

	mmp_icu_base = of_iomap(node, 0);
	if (!mmp_icu_base) {
		pr_err("Failed to get interrupt controller register\n");
		return;
	}

	irq_base = irq_alloc_descs(-1, 0, nr_irqs - NR_IRQS_LEGACY, 0);
	if (irq_base < 0) {
		pr_err("Failed to allocate IRQ numbers\n");
		goto err;
	} else if (irq_base != NR_IRQS_LEGACY) {
		pr_err("ICU's irqbase should be started from 0\n");
		goto err;
	}
	icu_data[0].conf_enable = conf->conf_enable;
	icu_data[0].conf_disable = conf->conf_disable;
	icu_data[0].conf_mask = conf->conf_mask;
	icu_data[0].nr_irqs = nr_irqs;
	icu_data[0].virq_base = 0;
	icu_data[0].domain = irq_domain_add_legacy(node, nr_irqs, 0, 0,
						   &mmp_irq_domain_ops,
						   &icu_data[0]);
	irq_set_default_host(icu_data[0].domain);
	for (irq = 0; irq < nr_irqs; irq++)
		icu_mask_irq(irq_get_irq_data(irq));
	mmp2_mux_init(node);
	return;
err:
	iounmap(mmp_icu_base);
}
#endif