diff options
Diffstat (limited to 'drivers/irqchip/irq-madera.c')
| -rw-r--r-- | drivers/irqchip/irq-madera.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-madera.c b/drivers/irqchip/irq-madera.c new file mode 100644 index 000000000000..e9256dee1a45 --- /dev/null +++ b/drivers/irqchip/irq-madera.c @@ -0,0 +1,256 @@ +// 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/gpio.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_gpio.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"); |