summaryrefslogtreecommitdiffstats
path: root/drivers/irqchip/irq-madera.c
blob: 8b81271c823c69975d17bd74ea520cab11eb2299 (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
// SPDX-License-Identifier: GPL-2.0
/*
 * Interrupt support for Cirrus Logic Madera codecs
 *
 * Copyright (C) 2015-2018 Cirrus Logic, Inc. and
 *                         Cirrus Logic International Semiconductor Ltd.
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/irqchip/irq-madera.h>
#include <linux/mfd/madera/core.h>
#include <linux/mfd/madera/pdata.h>
#include <linux/mfd/madera/registers.h>

#define MADERA_IRQ(_irq, _reg)					\
	[MADERA_IRQ_ ## _irq] = {				\
		.reg_offset = (_reg) - MADERA_IRQ1_STATUS_2,	\
		.mask = MADERA_ ## _irq ## _EINT1		\
	}

/* Mappings are the same for all Madera codecs */
static const struct regmap_irq madera_irqs[MADERA_NUM_IRQ] = {
	MADERA_IRQ(FLL1_LOCK,		MADERA_IRQ1_STATUS_2),
	MADERA_IRQ(FLL2_LOCK,		MADERA_IRQ1_STATUS_2),
	MADERA_IRQ(FLL3_LOCK,		MADERA_IRQ1_STATUS_2),
	MADERA_IRQ(FLLAO_LOCK,		MADERA_IRQ1_STATUS_2),

	MADERA_IRQ(MICDET1,		MADERA_IRQ1_STATUS_6),
	MADERA_IRQ(MICDET2,		MADERA_IRQ1_STATUS_6),
	MADERA_IRQ(HPDET,		MADERA_IRQ1_STATUS_6),

	MADERA_IRQ(MICD_CLAMP_RISE,	MADERA_IRQ1_STATUS_7),
	MADERA_IRQ(MICD_CLAMP_FALL,	MADERA_IRQ1_STATUS_7),
	MADERA_IRQ(JD1_RISE,		MADERA_IRQ1_STATUS_7),
	MADERA_IRQ(JD1_FALL,		MADERA_IRQ1_STATUS_7),

	MADERA_IRQ(ASRC2_IN1_LOCK,	MADERA_IRQ1_STATUS_9),
	MADERA_IRQ(ASRC2_IN2_LOCK,	MADERA_IRQ1_STATUS_9),
	MADERA_IRQ(ASRC1_IN1_LOCK,	MADERA_IRQ1_STATUS_9),
	MADERA_IRQ(ASRC1_IN2_LOCK,	MADERA_IRQ1_STATUS_9),
	MADERA_IRQ(DRC2_SIG_DET,	MADERA_IRQ1_STATUS_9),
	MADERA_IRQ(DRC1_SIG_DET,	MADERA_IRQ1_STATUS_9),

	MADERA_IRQ(DSP_IRQ1,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ2,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ3,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ4,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ5,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ6,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ7,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ8,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ9,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ10,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ11,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ12,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ13,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ14,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ15,		MADERA_IRQ1_STATUS_11),
	MADERA_IRQ(DSP_IRQ16,		MADERA_IRQ1_STATUS_11),

	MADERA_IRQ(HP3R_SC,		MADERA_IRQ1_STATUS_12),
	MADERA_IRQ(HP3L_SC,		MADERA_IRQ1_STATUS_12),
	MADERA_IRQ(HP2R_SC,		MADERA_IRQ1_STATUS_12),
	MADERA_IRQ(HP2L_SC,		MADERA_IRQ1_STATUS_12),
	MADERA_IRQ(HP1R_SC,		MADERA_IRQ1_STATUS_12),
	MADERA_IRQ(HP1L_SC,		MADERA_IRQ1_STATUS_12),

	MADERA_IRQ(SPK_OVERHEAT_WARN,	MADERA_IRQ1_STATUS_15),
	MADERA_IRQ(SPK_OVERHEAT,	MADERA_IRQ1_STATUS_15),

	MADERA_IRQ(DSP1_BUS_ERR,	MADERA_IRQ1_STATUS_33),
	MADERA_IRQ(DSP2_BUS_ERR,	MADERA_IRQ1_STATUS_33),
	MADERA_IRQ(DSP3_BUS_ERR,	MADERA_IRQ1_STATUS_33),
	MADERA_IRQ(DSP4_BUS_ERR,	MADERA_IRQ1_STATUS_33),
	MADERA_IRQ(DSP5_BUS_ERR,	MADERA_IRQ1_STATUS_33),
	MADERA_IRQ(DSP6_BUS_ERR,	MADERA_IRQ1_STATUS_33),
	MADERA_IRQ(DSP7_BUS_ERR,	MADERA_IRQ1_STATUS_33),
};

static const struct regmap_irq_chip madera_irq_chip = {
	.name		= "madera IRQ",
	.status_base	= MADERA_IRQ1_STATUS_2,
	.mask_base	= MADERA_IRQ1_MASK_2,
	.ack_base	= MADERA_IRQ1_STATUS_2,
	.runtime_pm	= true,
	.num_regs	= 32,
	.irqs		= madera_irqs,
	.num_irqs	= ARRAY_SIZE(madera_irqs),
};

#ifdef CONFIG_PM_SLEEP
static int madera_suspend(struct device *dev)
{
	struct madera *madera = dev_get_drvdata(dev->parent);

	dev_dbg(madera->irq_dev, "Suspend, disabling IRQ\n");

	/*
	 * A runtime resume would be needed to access the chip interrupt
	 * controller but runtime pm doesn't function during suspend.
	 * Temporarily disable interrupts until we reach suspend_noirq state.
	 */
	disable_irq(madera->irq);

	return 0;
}

static int madera_suspend_noirq(struct device *dev)
{
	struct madera *madera = dev_get_drvdata(dev->parent);

	dev_dbg(madera->irq_dev, "No IRQ suspend, reenabling IRQ\n");

	/* Re-enable interrupts to service wakeup interrupts from the chip */
	enable_irq(madera->irq);

	return 0;
}

static int madera_resume_noirq(struct device *dev)
{
	struct madera *madera = dev_get_drvdata(dev->parent);

	dev_dbg(madera->irq_dev, "No IRQ resume, disabling IRQ\n");

	/*
	 * We can't handle interrupts until runtime pm is available again.
	 * Disable them temporarily.
	 */
	disable_irq(madera->irq);

	return 0;
}

static int madera_resume(struct device *dev)
{
	struct madera *madera = dev_get_drvdata(dev->parent);

	dev_dbg(madera->irq_dev, "Resume, reenabling IRQ\n");

	/* Interrupts can now be handled */
	enable_irq(madera->irq);

	return 0;
}
#endif

static const struct dev_pm_ops madera_irq_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(madera_suspend, madera_resume)
	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(madera_suspend_noirq,
				      madera_resume_noirq)
};

static int madera_irq_probe(struct platform_device *pdev)
{
	struct madera *madera = dev_get_drvdata(pdev->dev.parent);
	struct irq_data *irq_data;
	unsigned int irq_flags = 0;
	int ret;

	dev_dbg(&pdev->dev, "probe\n");

	/*
	 * Read the flags from the interrupt controller if not specified
	 * by pdata
	 */
	irq_flags = madera->pdata.irq_flags;
	if (!irq_flags) {
		irq_data = irq_get_irq_data(madera->irq);
		if (!irq_data) {
			dev_err(&pdev->dev, "Invalid IRQ: %d\n", madera->irq);
			return -EINVAL;
		}

		irq_flags = irqd_get_trigger_type(irq_data);

		/* Codec defaults to trigger low, use this if no flags given */
		if (irq_flags == IRQ_TYPE_NONE)
			irq_flags = IRQF_TRIGGER_LOW;
	}

	if (irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
		dev_err(&pdev->dev, "Host interrupt not level-triggered\n");
		return -EINVAL;
	}

	/*
	 * The silicon always starts at active-low, check if we need to
	 * switch to active-high.
	 */
	if (irq_flags & IRQF_TRIGGER_HIGH) {
		ret = regmap_update_bits(madera->regmap, MADERA_IRQ1_CTRL,
					 MADERA_IRQ_POL_MASK, 0);
		if (ret) {
			dev_err(&pdev->dev,
				"Failed to set IRQ polarity: %d\n", ret);
			return ret;
		}
	}

	/*
	 * NOTE: regmap registers this against the OF node of the parent of
	 * the regmap - that is, against the mfd driver
	 */
	ret = regmap_add_irq_chip(madera->regmap, madera->irq, IRQF_ONESHOT, 0,
				  &madera_irq_chip, &madera->irq_data);
	if (ret) {
		dev_err(&pdev->dev, "add_irq_chip failed: %d\n", ret);
		return ret;
	}

	/* Save dev in parent MFD struct so it is accessible to siblings */
	madera->irq_dev = &pdev->dev;

	return 0;
}

static int madera_irq_remove(struct platform_device *pdev)
{
	struct madera *madera = dev_get_drvdata(pdev->dev.parent);

	/*
	 * The IRQ is disabled by the parent MFD driver before
	 * it starts cleaning up all child drivers
	 */
	madera->irq_dev = NULL;
	regmap_del_irq_chip(madera->irq, madera->irq_data);

	return 0;
}

static struct platform_driver madera_irq_driver = {
	.probe	= &madera_irq_probe,
	.remove = &madera_irq_remove,
	.driver = {
		.name	= "madera-irq",
		.pm	= &madera_irq_pm_ops,
	}
};
module_platform_driver(madera_irq_driver);

MODULE_SOFTDEP("pre: madera");
MODULE_DESCRIPTION("Madera IRQ driver");
MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
MODULE_LICENSE("GPL v2");
OpenPOWER on IntegriCloud