257 lines
7.2 KiB
C
257 lines
7.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Interrupt support for Cirrus Logic Madera codecs
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*
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* Copyright (C) 2015-2018 Cirrus Logic, Inc. and
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* Cirrus Logic International Semiconductor Ltd.
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*/
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#include <linux/module.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/of_irq.h>
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#include <linux/irqchip/irq-madera.h>
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#include <linux/mfd/madera/core.h>
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#include <linux/mfd/madera/pdata.h>
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#include <linux/mfd/madera/registers.h>
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#define MADERA_IRQ(_irq, _reg) \
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[MADERA_IRQ_ ## _irq] = { \
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.reg_offset = (_reg) - MADERA_IRQ1_STATUS_2, \
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.mask = MADERA_ ## _irq ## _EINT1 \
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}
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/* Mappings are the same for all Madera codecs */
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static const struct regmap_irq madera_irqs[MADERA_NUM_IRQ] = {
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MADERA_IRQ(FLL1_LOCK, MADERA_IRQ1_STATUS_2),
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MADERA_IRQ(FLL2_LOCK, MADERA_IRQ1_STATUS_2),
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MADERA_IRQ(FLL3_LOCK, MADERA_IRQ1_STATUS_2),
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MADERA_IRQ(FLLAO_LOCK, MADERA_IRQ1_STATUS_2),
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MADERA_IRQ(MICDET1, MADERA_IRQ1_STATUS_6),
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MADERA_IRQ(MICDET2, MADERA_IRQ1_STATUS_6),
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MADERA_IRQ(HPDET, MADERA_IRQ1_STATUS_6),
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MADERA_IRQ(MICD_CLAMP_RISE, MADERA_IRQ1_STATUS_7),
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MADERA_IRQ(MICD_CLAMP_FALL, MADERA_IRQ1_STATUS_7),
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MADERA_IRQ(JD1_RISE, MADERA_IRQ1_STATUS_7),
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MADERA_IRQ(JD1_FALL, MADERA_IRQ1_STATUS_7),
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MADERA_IRQ(ASRC2_IN1_LOCK, MADERA_IRQ1_STATUS_9),
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MADERA_IRQ(ASRC2_IN2_LOCK, MADERA_IRQ1_STATUS_9),
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MADERA_IRQ(ASRC1_IN1_LOCK, MADERA_IRQ1_STATUS_9),
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MADERA_IRQ(ASRC1_IN2_LOCK, MADERA_IRQ1_STATUS_9),
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MADERA_IRQ(DRC2_SIG_DET, MADERA_IRQ1_STATUS_9),
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MADERA_IRQ(DRC1_SIG_DET, MADERA_IRQ1_STATUS_9),
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MADERA_IRQ(DSP_IRQ1, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ2, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ3, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ4, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ5, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ6, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ7, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ8, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ9, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ10, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ11, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ12, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ13, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ14, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ15, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(DSP_IRQ16, MADERA_IRQ1_STATUS_11),
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MADERA_IRQ(HP3R_SC, MADERA_IRQ1_STATUS_12),
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MADERA_IRQ(HP3L_SC, MADERA_IRQ1_STATUS_12),
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MADERA_IRQ(HP2R_SC, MADERA_IRQ1_STATUS_12),
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MADERA_IRQ(HP2L_SC, MADERA_IRQ1_STATUS_12),
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MADERA_IRQ(HP1R_SC, MADERA_IRQ1_STATUS_12),
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MADERA_IRQ(HP1L_SC, MADERA_IRQ1_STATUS_12),
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MADERA_IRQ(SPK_OVERHEAT_WARN, MADERA_IRQ1_STATUS_15),
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MADERA_IRQ(SPK_OVERHEAT, MADERA_IRQ1_STATUS_15),
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MADERA_IRQ(DSP1_BUS_ERR, MADERA_IRQ1_STATUS_33),
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MADERA_IRQ(DSP2_BUS_ERR, MADERA_IRQ1_STATUS_33),
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MADERA_IRQ(DSP3_BUS_ERR, MADERA_IRQ1_STATUS_33),
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MADERA_IRQ(DSP4_BUS_ERR, MADERA_IRQ1_STATUS_33),
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MADERA_IRQ(DSP5_BUS_ERR, MADERA_IRQ1_STATUS_33),
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MADERA_IRQ(DSP6_BUS_ERR, MADERA_IRQ1_STATUS_33),
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MADERA_IRQ(DSP7_BUS_ERR, MADERA_IRQ1_STATUS_33),
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};
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static const struct regmap_irq_chip madera_irq_chip = {
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.name = "madera IRQ",
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.status_base = MADERA_IRQ1_STATUS_2,
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.mask_base = MADERA_IRQ1_MASK_2,
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.ack_base = MADERA_IRQ1_STATUS_2,
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.runtime_pm = true,
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.num_regs = 32,
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.irqs = madera_irqs,
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.num_irqs = ARRAY_SIZE(madera_irqs),
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};
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#ifdef CONFIG_PM_SLEEP
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static int madera_suspend(struct device *dev)
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{
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struct madera *madera = dev_get_drvdata(dev->parent);
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dev_dbg(madera->irq_dev, "Suspend, disabling IRQ\n");
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/*
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* A runtime resume would be needed to access the chip interrupt
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* controller but runtime pm doesn't function during suspend.
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* Temporarily disable interrupts until we reach suspend_noirq state.
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*/
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disable_irq(madera->irq);
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return 0;
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}
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static int madera_suspend_noirq(struct device *dev)
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{
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struct madera *madera = dev_get_drvdata(dev->parent);
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dev_dbg(madera->irq_dev, "No IRQ suspend, reenabling IRQ\n");
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/* Re-enable interrupts to service wakeup interrupts from the chip */
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enable_irq(madera->irq);
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return 0;
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}
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static int madera_resume_noirq(struct device *dev)
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{
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struct madera *madera = dev_get_drvdata(dev->parent);
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dev_dbg(madera->irq_dev, "No IRQ resume, disabling IRQ\n");
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/*
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* We can't handle interrupts until runtime pm is available again.
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* Disable them temporarily.
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*/
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disable_irq(madera->irq);
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return 0;
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}
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static int madera_resume(struct device *dev)
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{
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struct madera *madera = dev_get_drvdata(dev->parent);
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dev_dbg(madera->irq_dev, "Resume, reenabling IRQ\n");
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/* Interrupts can now be handled */
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enable_irq(madera->irq);
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return 0;
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}
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#endif
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static const struct dev_pm_ops madera_irq_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(madera_suspend, madera_resume)
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SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(madera_suspend_noirq,
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madera_resume_noirq)
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};
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static int madera_irq_probe(struct platform_device *pdev)
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{
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struct madera *madera = dev_get_drvdata(pdev->dev.parent);
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struct irq_data *irq_data;
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unsigned int irq_flags = 0;
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int ret;
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dev_dbg(&pdev->dev, "probe\n");
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/*
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* Read the flags from the interrupt controller if not specified
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* by pdata
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*/
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irq_flags = madera->pdata.irq_flags;
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if (!irq_flags) {
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irq_data = irq_get_irq_data(madera->irq);
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if (!irq_data) {
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dev_err(&pdev->dev, "Invalid IRQ: %d\n", madera->irq);
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return -EINVAL;
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}
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irq_flags = irqd_get_trigger_type(irq_data);
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/* Codec defaults to trigger low, use this if no flags given */
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if (irq_flags == IRQ_TYPE_NONE)
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irq_flags = IRQF_TRIGGER_LOW;
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}
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if (irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
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dev_err(&pdev->dev, "Host interrupt not level-triggered\n");
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return -EINVAL;
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}
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/*
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* The silicon always starts at active-low, check if we need to
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* switch to active-high.
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*/
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if (irq_flags & IRQF_TRIGGER_HIGH) {
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ret = regmap_update_bits(madera->regmap, MADERA_IRQ1_CTRL,
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MADERA_IRQ_POL_MASK, 0);
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if (ret) {
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dev_err(&pdev->dev,
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"Failed to set IRQ polarity: %d\n", ret);
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return ret;
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}
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}
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/*
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* NOTE: regmap registers this against the OF node of the parent of
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* the regmap - that is, against the mfd driver
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*/
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ret = regmap_add_irq_chip(madera->regmap, madera->irq, IRQF_ONESHOT, 0,
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&madera_irq_chip, &madera->irq_data);
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if (ret) {
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dev_err(&pdev->dev, "add_irq_chip failed: %d\n", ret);
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return ret;
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}
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/* Save dev in parent MFD struct so it is accessible to siblings */
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madera->irq_dev = &pdev->dev;
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return 0;
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}
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static int madera_irq_remove(struct platform_device *pdev)
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{
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struct madera *madera = dev_get_drvdata(pdev->dev.parent);
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/*
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* The IRQ is disabled by the parent MFD driver before
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* it starts cleaning up all child drivers
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*/
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madera->irq_dev = NULL;
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regmap_del_irq_chip(madera->irq, madera->irq_data);
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return 0;
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}
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static struct platform_driver madera_irq_driver = {
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.probe = &madera_irq_probe,
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.remove = &madera_irq_remove,
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.driver = {
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.name = "madera-irq",
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.pm = &madera_irq_pm_ops,
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}
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};
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module_platform_driver(madera_irq_driver);
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MODULE_SOFTDEP("pre: madera");
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MODULE_DESCRIPTION("Madera IRQ driver");
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MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
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MODULE_LICENSE("GPL v2");
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