1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Interrupt support for Cirrus Logic Madera codecs 4 * 5 * Copyright (C) 2015-2018 Cirrus Logic, Inc. and 6 * Cirrus Logic International Semiconductor Ltd. 7 */ 8 9#include <linux/module.h> 10#include <linux/interrupt.h> 11#include <linux/irq.h> 12#include <linux/irqdomain.h> 13#include <linux/pm_runtime.h> 14#include <linux/regmap.h> 15#include <linux/slab.h> 16#include <linux/of.h> 17#include <linux/of_device.h> 18#include <linux/of_irq.h> 19#include <linux/irqchip/irq-madera.h> 20#include <linux/mfd/madera/core.h> 21#include <linux/mfd/madera/pdata.h> 22#include <linux/mfd/madera/registers.h> 23 24#define MADERA_IRQ(_irq, _reg) \ 25 [MADERA_IRQ_ ## _irq] = { \ 26 .reg_offset = (_reg) - MADERA_IRQ1_STATUS_2, \ 27 .mask = MADERA_ ## _irq ## _EINT1 \ 28 } 29 30/* Mappings are the same for all Madera codecs */ 31static const struct regmap_irq madera_irqs[MADERA_NUM_IRQ] = { 32 MADERA_IRQ(FLL1_LOCK, MADERA_IRQ1_STATUS_2), 33 MADERA_IRQ(FLL2_LOCK, MADERA_IRQ1_STATUS_2), 34 MADERA_IRQ(FLL3_LOCK, MADERA_IRQ1_STATUS_2), 35 MADERA_IRQ(FLLAO_LOCK, MADERA_IRQ1_STATUS_2), 36 37 MADERA_IRQ(MICDET1, MADERA_IRQ1_STATUS_6), 38 MADERA_IRQ(MICDET2, MADERA_IRQ1_STATUS_6), 39 MADERA_IRQ(HPDET, MADERA_IRQ1_STATUS_6), 40 41 MADERA_IRQ(MICD_CLAMP_RISE, MADERA_IRQ1_STATUS_7), 42 MADERA_IRQ(MICD_CLAMP_FALL, MADERA_IRQ1_STATUS_7), 43 MADERA_IRQ(JD1_RISE, MADERA_IRQ1_STATUS_7), 44 MADERA_IRQ(JD1_FALL, MADERA_IRQ1_STATUS_7), 45 46 MADERA_IRQ(ASRC2_IN1_LOCK, MADERA_IRQ1_STATUS_9), 47 MADERA_IRQ(ASRC2_IN2_LOCK, MADERA_IRQ1_STATUS_9), 48 MADERA_IRQ(ASRC1_IN1_LOCK, MADERA_IRQ1_STATUS_9), 49 MADERA_IRQ(ASRC1_IN2_LOCK, MADERA_IRQ1_STATUS_9), 50 MADERA_IRQ(DRC2_SIG_DET, MADERA_IRQ1_STATUS_9), 51 MADERA_IRQ(DRC1_SIG_DET, MADERA_IRQ1_STATUS_9), 52 53 MADERA_IRQ(DSP_IRQ1, MADERA_IRQ1_STATUS_11), 54 MADERA_IRQ(DSP_IRQ2, MADERA_IRQ1_STATUS_11), 55 MADERA_IRQ(DSP_IRQ3, MADERA_IRQ1_STATUS_11), 56 MADERA_IRQ(DSP_IRQ4, MADERA_IRQ1_STATUS_11), 57 MADERA_IRQ(DSP_IRQ5, MADERA_IRQ1_STATUS_11), 58 MADERA_IRQ(DSP_IRQ6, MADERA_IRQ1_STATUS_11), 59 MADERA_IRQ(DSP_IRQ7, MADERA_IRQ1_STATUS_11), 60 MADERA_IRQ(DSP_IRQ8, MADERA_IRQ1_STATUS_11), 61 MADERA_IRQ(DSP_IRQ9, MADERA_IRQ1_STATUS_11), 62 MADERA_IRQ(DSP_IRQ10, MADERA_IRQ1_STATUS_11), 63 MADERA_IRQ(DSP_IRQ11, MADERA_IRQ1_STATUS_11), 64 MADERA_IRQ(DSP_IRQ12, MADERA_IRQ1_STATUS_11), 65 MADERA_IRQ(DSP_IRQ13, MADERA_IRQ1_STATUS_11), 66 MADERA_IRQ(DSP_IRQ14, MADERA_IRQ1_STATUS_11), 67 MADERA_IRQ(DSP_IRQ15, MADERA_IRQ1_STATUS_11), 68 MADERA_IRQ(DSP_IRQ16, MADERA_IRQ1_STATUS_11), 69 70 MADERA_IRQ(HP3R_SC, MADERA_IRQ1_STATUS_12), 71 MADERA_IRQ(HP3L_SC, MADERA_IRQ1_STATUS_12), 72 MADERA_IRQ(HP2R_SC, MADERA_IRQ1_STATUS_12), 73 MADERA_IRQ(HP2L_SC, MADERA_IRQ1_STATUS_12), 74 MADERA_IRQ(HP1R_SC, MADERA_IRQ1_STATUS_12), 75 MADERA_IRQ(HP1L_SC, MADERA_IRQ1_STATUS_12), 76 77 MADERA_IRQ(SPK_OVERHEAT_WARN, MADERA_IRQ1_STATUS_15), 78 MADERA_IRQ(SPK_OVERHEAT, MADERA_IRQ1_STATUS_15), 79 80 MADERA_IRQ(DSP1_BUS_ERR, MADERA_IRQ1_STATUS_33), 81 MADERA_IRQ(DSP2_BUS_ERR, MADERA_IRQ1_STATUS_33), 82 MADERA_IRQ(DSP3_BUS_ERR, MADERA_IRQ1_STATUS_33), 83 MADERA_IRQ(DSP4_BUS_ERR, MADERA_IRQ1_STATUS_33), 84 MADERA_IRQ(DSP5_BUS_ERR, MADERA_IRQ1_STATUS_33), 85 MADERA_IRQ(DSP6_BUS_ERR, MADERA_IRQ1_STATUS_33), 86 MADERA_IRQ(DSP7_BUS_ERR, MADERA_IRQ1_STATUS_33), 87}; 88 89static const struct regmap_irq_chip madera_irq_chip = { 90 .name = "madera IRQ", 91 .status_base = MADERA_IRQ1_STATUS_2, 92 .mask_base = MADERA_IRQ1_MASK_2, 93 .ack_base = MADERA_IRQ1_STATUS_2, 94 .runtime_pm = true, 95 .num_regs = 32, 96 .irqs = madera_irqs, 97 .num_irqs = ARRAY_SIZE(madera_irqs), 98}; 99 100#ifdef CONFIG_PM_SLEEP 101static int madera_suspend(struct device *dev) 102{ 103 struct madera *madera = dev_get_drvdata(dev->parent); 104 105 dev_dbg(madera->irq_dev, "Suspend, disabling IRQ\n"); 106 107 /* 108 * A runtime resume would be needed to access the chip interrupt 109 * controller but runtime pm doesn't function during suspend. 110 * Temporarily disable interrupts until we reach suspend_noirq state. 111 */ 112 disable_irq(madera->irq); 113 114 return 0; 115} 116 117static int madera_suspend_noirq(struct device *dev) 118{ 119 struct madera *madera = dev_get_drvdata(dev->parent); 120 121 dev_dbg(madera->irq_dev, "No IRQ suspend, reenabling IRQ\n"); 122 123 /* Re-enable interrupts to service wakeup interrupts from the chip */ 124 enable_irq(madera->irq); 125 126 return 0; 127} 128 129static int madera_resume_noirq(struct device *dev) 130{ 131 struct madera *madera = dev_get_drvdata(dev->parent); 132 133 dev_dbg(madera->irq_dev, "No IRQ resume, disabling IRQ\n"); 134 135 /* 136 * We can't handle interrupts until runtime pm is available again. 137 * Disable them temporarily. 138 */ 139 disable_irq(madera->irq); 140 141 return 0; 142} 143 144static int madera_resume(struct device *dev) 145{ 146 struct madera *madera = dev_get_drvdata(dev->parent); 147 148 dev_dbg(madera->irq_dev, "Resume, reenabling IRQ\n"); 149 150 /* Interrupts can now be handled */ 151 enable_irq(madera->irq); 152 153 return 0; 154} 155#endif 156 157static const struct dev_pm_ops madera_irq_pm_ops = { 158 SET_SYSTEM_SLEEP_PM_OPS(madera_suspend, madera_resume) 159 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(madera_suspend_noirq, 160 madera_resume_noirq) 161}; 162 163static int madera_irq_probe(struct platform_device *pdev) 164{ 165 struct madera *madera = dev_get_drvdata(pdev->dev.parent); 166 struct irq_data *irq_data; 167 unsigned int irq_flags = 0; 168 int ret; 169 170 dev_dbg(&pdev->dev, "probe\n"); 171 172 /* 173 * Read the flags from the interrupt controller if not specified 174 * by pdata 175 */ 176 irq_flags = madera->pdata.irq_flags; 177 if (!irq_flags) { 178 irq_data = irq_get_irq_data(madera->irq); 179 if (!irq_data) { 180 dev_err(&pdev->dev, "Invalid IRQ: %d\n", madera->irq); 181 return -EINVAL; 182 } 183 184 irq_flags = irqd_get_trigger_type(irq_data); 185 186 /* Codec defaults to trigger low, use this if no flags given */ 187 if (irq_flags == IRQ_TYPE_NONE) 188 irq_flags = IRQF_TRIGGER_LOW; 189 } 190 191 if (irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) { 192 dev_err(&pdev->dev, "Host interrupt not level-triggered\n"); 193 return -EINVAL; 194 } 195 196 /* 197 * The silicon always starts at active-low, check if we need to 198 * switch to active-high. 199 */ 200 if (irq_flags & IRQF_TRIGGER_HIGH) { 201 ret = regmap_update_bits(madera->regmap, MADERA_IRQ1_CTRL, 202 MADERA_IRQ_POL_MASK, 0); 203 if (ret) { 204 dev_err(&pdev->dev, 205 "Failed to set IRQ polarity: %d\n", ret); 206 return ret; 207 } 208 } 209 210 /* 211 * NOTE: regmap registers this against the OF node of the parent of 212 * the regmap - that is, against the mfd driver 213 */ 214 ret = regmap_add_irq_chip(madera->regmap, madera->irq, IRQF_ONESHOT, 0, 215 &madera_irq_chip, &madera->irq_data); 216 if (ret) { 217 dev_err(&pdev->dev, "add_irq_chip failed: %d\n", ret); 218 return ret; 219 } 220 221 /* Save dev in parent MFD struct so it is accessible to siblings */ 222 madera->irq_dev = &pdev->dev; 223 224 return 0; 225} 226 227static int madera_irq_remove(struct platform_device *pdev) 228{ 229 struct madera *madera = dev_get_drvdata(pdev->dev.parent); 230 231 /* 232 * The IRQ is disabled by the parent MFD driver before 233 * it starts cleaning up all child drivers 234 */ 235 madera->irq_dev = NULL; 236 regmap_del_irq_chip(madera->irq, madera->irq_data); 237 238 return 0; 239} 240 241static struct platform_driver madera_irq_driver = { 242 .probe = &madera_irq_probe, 243 .remove = &madera_irq_remove, 244 .driver = { 245 .name = "madera-irq", 246 .pm = &madera_irq_pm_ops, 247 } 248}; 249module_platform_driver(madera_irq_driver); 250 251MODULE_SOFTDEP("pre: madera"); 252MODULE_DESCRIPTION("Madera IRQ driver"); 253MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); 254MODULE_LICENSE("GPL v2"); 255