// 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");