1 // SPDX-License-Identifier: GPL-2.0
3 * Interrupt support for Cirrus Logic Madera codecs
5 * Copyright (C) 2015-2018 Cirrus Logic, Inc. and
6 * Cirrus Logic International Semiconductor Ltd.
9 #include <linux/module.h>
10 #include <linux/gpio.h>
11 #include <linux/interrupt.h>
12 #include <linux/irq.h>
13 #include <linux/irqdomain.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/regmap.h>
16 #include <linux/slab.h>
18 #include <linux/of_device.h>
19 #include <linux/of_gpio.h>
20 #include <linux/of_irq.h>
21 #include <linux/irqchip/irq-madera.h>
22 #include <linux/mfd/madera/core.h>
23 #include <linux/mfd/madera/pdata.h>
24 #include <linux/mfd/madera/registers.h>
26 #define MADERA_IRQ(_irq, _reg) \
27 [MADERA_IRQ_ ## _irq] = { \
28 .reg_offset = (_reg) - MADERA_IRQ1_STATUS_2, \
29 .mask = MADERA_ ## _irq ## _EINT1 \
32 /* Mappings are the same for all Madera codecs */
33 static const struct regmap_irq madera_irqs[MADERA_NUM_IRQ] = {
34 MADERA_IRQ(FLL1_LOCK, MADERA_IRQ1_STATUS_2),
35 MADERA_IRQ(FLL2_LOCK, MADERA_IRQ1_STATUS_2),
36 MADERA_IRQ(FLL3_LOCK, MADERA_IRQ1_STATUS_2),
37 MADERA_IRQ(FLLAO_LOCK, MADERA_IRQ1_STATUS_2),
39 MADERA_IRQ(MICDET1, MADERA_IRQ1_STATUS_6),
40 MADERA_IRQ(MICDET2, MADERA_IRQ1_STATUS_6),
41 MADERA_IRQ(HPDET, MADERA_IRQ1_STATUS_6),
43 MADERA_IRQ(MICD_CLAMP_RISE, MADERA_IRQ1_STATUS_7),
44 MADERA_IRQ(MICD_CLAMP_FALL, MADERA_IRQ1_STATUS_7),
45 MADERA_IRQ(JD1_RISE, MADERA_IRQ1_STATUS_7),
46 MADERA_IRQ(JD1_FALL, MADERA_IRQ1_STATUS_7),
48 MADERA_IRQ(ASRC2_IN1_LOCK, MADERA_IRQ1_STATUS_9),
49 MADERA_IRQ(ASRC2_IN2_LOCK, MADERA_IRQ1_STATUS_9),
50 MADERA_IRQ(ASRC1_IN1_LOCK, MADERA_IRQ1_STATUS_9),
51 MADERA_IRQ(ASRC1_IN2_LOCK, MADERA_IRQ1_STATUS_9),
52 MADERA_IRQ(DRC2_SIG_DET, MADERA_IRQ1_STATUS_9),
53 MADERA_IRQ(DRC1_SIG_DET, MADERA_IRQ1_STATUS_9),
55 MADERA_IRQ(DSP_IRQ1, MADERA_IRQ1_STATUS_11),
56 MADERA_IRQ(DSP_IRQ2, MADERA_IRQ1_STATUS_11),
57 MADERA_IRQ(DSP_IRQ3, MADERA_IRQ1_STATUS_11),
58 MADERA_IRQ(DSP_IRQ4, MADERA_IRQ1_STATUS_11),
59 MADERA_IRQ(DSP_IRQ5, MADERA_IRQ1_STATUS_11),
60 MADERA_IRQ(DSP_IRQ6, MADERA_IRQ1_STATUS_11),
61 MADERA_IRQ(DSP_IRQ7, MADERA_IRQ1_STATUS_11),
62 MADERA_IRQ(DSP_IRQ8, MADERA_IRQ1_STATUS_11),
63 MADERA_IRQ(DSP_IRQ9, MADERA_IRQ1_STATUS_11),
64 MADERA_IRQ(DSP_IRQ10, MADERA_IRQ1_STATUS_11),
65 MADERA_IRQ(DSP_IRQ11, MADERA_IRQ1_STATUS_11),
66 MADERA_IRQ(DSP_IRQ12, MADERA_IRQ1_STATUS_11),
67 MADERA_IRQ(DSP_IRQ13, MADERA_IRQ1_STATUS_11),
68 MADERA_IRQ(DSP_IRQ14, MADERA_IRQ1_STATUS_11),
69 MADERA_IRQ(DSP_IRQ15, MADERA_IRQ1_STATUS_11),
70 MADERA_IRQ(DSP_IRQ16, MADERA_IRQ1_STATUS_11),
72 MADERA_IRQ(HP3R_SC, MADERA_IRQ1_STATUS_12),
73 MADERA_IRQ(HP3L_SC, MADERA_IRQ1_STATUS_12),
74 MADERA_IRQ(HP2R_SC, MADERA_IRQ1_STATUS_12),
75 MADERA_IRQ(HP2L_SC, MADERA_IRQ1_STATUS_12),
76 MADERA_IRQ(HP1R_SC, MADERA_IRQ1_STATUS_12),
77 MADERA_IRQ(HP1L_SC, MADERA_IRQ1_STATUS_12),
79 MADERA_IRQ(SPK_OVERHEAT_WARN, MADERA_IRQ1_STATUS_15),
80 MADERA_IRQ(SPK_OVERHEAT, MADERA_IRQ1_STATUS_15),
82 MADERA_IRQ(DSP1_BUS_ERR, MADERA_IRQ1_STATUS_33),
83 MADERA_IRQ(DSP2_BUS_ERR, MADERA_IRQ1_STATUS_33),
84 MADERA_IRQ(DSP3_BUS_ERR, MADERA_IRQ1_STATUS_33),
85 MADERA_IRQ(DSP4_BUS_ERR, MADERA_IRQ1_STATUS_33),
86 MADERA_IRQ(DSP5_BUS_ERR, MADERA_IRQ1_STATUS_33),
87 MADERA_IRQ(DSP6_BUS_ERR, MADERA_IRQ1_STATUS_33),
88 MADERA_IRQ(DSP7_BUS_ERR, MADERA_IRQ1_STATUS_33),
91 static const struct regmap_irq_chip madera_irq_chip = {
93 .status_base = MADERA_IRQ1_STATUS_2,
94 .mask_base = MADERA_IRQ1_MASK_2,
95 .ack_base = MADERA_IRQ1_STATUS_2,
99 .num_irqs = ARRAY_SIZE(madera_irqs),
102 #ifdef CONFIG_PM_SLEEP
103 static int madera_suspend(struct device *dev)
105 struct madera *madera = dev_get_drvdata(dev->parent);
107 dev_dbg(madera->irq_dev, "Suspend, disabling IRQ\n");
110 * A runtime resume would be needed to access the chip interrupt
111 * controller but runtime pm doesn't function during suspend.
112 * Temporarily disable interrupts until we reach suspend_noirq state.
114 disable_irq(madera->irq);
119 static int madera_suspend_noirq(struct device *dev)
121 struct madera *madera = dev_get_drvdata(dev->parent);
123 dev_dbg(madera->irq_dev, "No IRQ suspend, reenabling IRQ\n");
125 /* Re-enable interrupts to service wakeup interrupts from the chip */
126 enable_irq(madera->irq);
131 static int madera_resume_noirq(struct device *dev)
133 struct madera *madera = dev_get_drvdata(dev->parent);
135 dev_dbg(madera->irq_dev, "No IRQ resume, disabling IRQ\n");
138 * We can't handle interrupts until runtime pm is available again.
139 * Disable them temporarily.
141 disable_irq(madera->irq);
146 static int madera_resume(struct device *dev)
148 struct madera *madera = dev_get_drvdata(dev->parent);
150 dev_dbg(madera->irq_dev, "Resume, reenabling IRQ\n");
152 /* Interrupts can now be handled */
153 enable_irq(madera->irq);
159 static const struct dev_pm_ops madera_irq_pm_ops = {
160 SET_SYSTEM_SLEEP_PM_OPS(madera_suspend, madera_resume)
161 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(madera_suspend_noirq,
165 static int madera_irq_probe(struct platform_device *pdev)
167 struct madera *madera = dev_get_drvdata(pdev->dev.parent);
168 struct irq_data *irq_data;
169 unsigned int irq_flags = 0;
172 dev_dbg(&pdev->dev, "probe\n");
175 * Read the flags from the interrupt controller if not specified
178 irq_flags = madera->pdata.irq_flags;
180 irq_data = irq_get_irq_data(madera->irq);
182 dev_err(&pdev->dev, "Invalid IRQ: %d\n", madera->irq);
186 irq_flags = irqd_get_trigger_type(irq_data);
188 /* Codec defaults to trigger low, use this if no flags given */
189 if (irq_flags == IRQ_TYPE_NONE)
190 irq_flags = IRQF_TRIGGER_LOW;
193 if (irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
194 dev_err(&pdev->dev, "Host interrupt not level-triggered\n");
199 * The silicon always starts at active-low, check if we need to
200 * switch to active-high.
202 if (irq_flags & IRQF_TRIGGER_HIGH) {
203 ret = regmap_update_bits(madera->regmap, MADERA_IRQ1_CTRL,
204 MADERA_IRQ_POL_MASK, 0);
207 "Failed to set IRQ polarity: %d\n", ret);
213 * NOTE: regmap registers this against the OF node of the parent of
214 * the regmap - that is, against the mfd driver
216 ret = regmap_add_irq_chip(madera->regmap, madera->irq, IRQF_ONESHOT, 0,
217 &madera_irq_chip, &madera->irq_data);
219 dev_err(&pdev->dev, "add_irq_chip failed: %d\n", ret);
223 /* Save dev in parent MFD struct so it is accessible to siblings */
224 madera->irq_dev = &pdev->dev;
229 static int madera_irq_remove(struct platform_device *pdev)
231 struct madera *madera = dev_get_drvdata(pdev->dev.parent);
234 * The IRQ is disabled by the parent MFD driver before
235 * it starts cleaning up all child drivers
237 madera->irq_dev = NULL;
238 regmap_del_irq_chip(madera->irq, madera->irq_data);
243 static struct platform_driver madera_irq_driver = {
244 .probe = &madera_irq_probe,
245 .remove = &madera_irq_remove,
247 .name = "madera-irq",
248 .pm = &madera_irq_pm_ops,
251 module_platform_driver(madera_irq_driver);
253 MODULE_SOFTDEP("pre: madera");
254 MODULE_DESCRIPTION("Madera IRQ driver");
255 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
256 MODULE_LICENSE("GPL v2");