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