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/gpio.h> 11 #include <linux/interrupt.h> 12 #include <linux/irq.h> 13 #include <linux/irqdomain.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/regmap.h> 16 #include <linux/slab.h> 17 #include <linux/of.h> 18 #include <linux/of_device.h> 19 #include <linux/of_gpio.h> 20 #include <linux/of_irq.h> 21 #include <linux/irqchip/irq-madera.h> 22 #include <linux/mfd/madera/core.h> 23 #include <linux/mfd/madera/pdata.h> 24 #include <linux/mfd/madera/registers.h> 25 26 #define MADERA_IRQ(_irq, _reg) \ 27 [MADERA_IRQ_ ## _irq] = { \ 28 .reg_offset = (_reg) - MADERA_IRQ1_STATUS_2, \ 29 .mask = MADERA_ ## _irq ## _EINT1 \ 30 } 31 32 /* Mappings are the same for all Madera codecs */ 33 static const struct regmap_irq madera_irqs[MADERA_NUM_IRQ] = { 34 MADERA_IRQ(FLL1_LOCK, MADERA_IRQ1_STATUS_2), 35 MADERA_IRQ(FLL2_LOCK, MADERA_IRQ1_STATUS_2), 36 MADERA_IRQ(FLL3_LOCK, MADERA_IRQ1_STATUS_2), 37 MADERA_IRQ(FLLAO_LOCK, MADERA_IRQ1_STATUS_2), 38 39 MADERA_IRQ(MICDET1, MADERA_IRQ1_STATUS_6), 40 MADERA_IRQ(MICDET2, MADERA_IRQ1_STATUS_6), 41 MADERA_IRQ(HPDET, MADERA_IRQ1_STATUS_6), 42 43 MADERA_IRQ(MICD_CLAMP_RISE, MADERA_IRQ1_STATUS_7), 44 MADERA_IRQ(MICD_CLAMP_FALL, MADERA_IRQ1_STATUS_7), 45 MADERA_IRQ(JD1_RISE, MADERA_IRQ1_STATUS_7), 46 MADERA_IRQ(JD1_FALL, MADERA_IRQ1_STATUS_7), 47 48 MADERA_IRQ(ASRC2_IN1_LOCK, MADERA_IRQ1_STATUS_9), 49 MADERA_IRQ(ASRC2_IN2_LOCK, MADERA_IRQ1_STATUS_9), 50 MADERA_IRQ(ASRC1_IN1_LOCK, MADERA_IRQ1_STATUS_9), 51 MADERA_IRQ(ASRC1_IN2_LOCK, MADERA_IRQ1_STATUS_9), 52 MADERA_IRQ(DRC2_SIG_DET, MADERA_IRQ1_STATUS_9), 53 MADERA_IRQ(DRC1_SIG_DET, MADERA_IRQ1_STATUS_9), 54 55 MADERA_IRQ(DSP_IRQ1, MADERA_IRQ1_STATUS_11), 56 MADERA_IRQ(DSP_IRQ2, MADERA_IRQ1_STATUS_11), 57 MADERA_IRQ(DSP_IRQ3, MADERA_IRQ1_STATUS_11), 58 MADERA_IRQ(DSP_IRQ4, MADERA_IRQ1_STATUS_11), 59 MADERA_IRQ(DSP_IRQ5, MADERA_IRQ1_STATUS_11), 60 MADERA_IRQ(DSP_IRQ6, MADERA_IRQ1_STATUS_11), 61 MADERA_IRQ(DSP_IRQ7, MADERA_IRQ1_STATUS_11), 62 MADERA_IRQ(DSP_IRQ8, MADERA_IRQ1_STATUS_11), 63 MADERA_IRQ(DSP_IRQ9, MADERA_IRQ1_STATUS_11), 64 MADERA_IRQ(DSP_IRQ10, MADERA_IRQ1_STATUS_11), 65 MADERA_IRQ(DSP_IRQ11, MADERA_IRQ1_STATUS_11), 66 MADERA_IRQ(DSP_IRQ12, MADERA_IRQ1_STATUS_11), 67 MADERA_IRQ(DSP_IRQ13, MADERA_IRQ1_STATUS_11), 68 MADERA_IRQ(DSP_IRQ14, MADERA_IRQ1_STATUS_11), 69 MADERA_IRQ(DSP_IRQ15, MADERA_IRQ1_STATUS_11), 70 MADERA_IRQ(DSP_IRQ16, MADERA_IRQ1_STATUS_11), 71 72 MADERA_IRQ(HP3R_SC, MADERA_IRQ1_STATUS_12), 73 MADERA_IRQ(HP3L_SC, MADERA_IRQ1_STATUS_12), 74 MADERA_IRQ(HP2R_SC, MADERA_IRQ1_STATUS_12), 75 MADERA_IRQ(HP2L_SC, MADERA_IRQ1_STATUS_12), 76 MADERA_IRQ(HP1R_SC, MADERA_IRQ1_STATUS_12), 77 MADERA_IRQ(HP1L_SC, MADERA_IRQ1_STATUS_12), 78 79 MADERA_IRQ(SPK_OVERHEAT_WARN, MADERA_IRQ1_STATUS_15), 80 MADERA_IRQ(SPK_OVERHEAT, MADERA_IRQ1_STATUS_15), 81 82 MADERA_IRQ(DSP1_BUS_ERR, MADERA_IRQ1_STATUS_33), 83 MADERA_IRQ(DSP2_BUS_ERR, MADERA_IRQ1_STATUS_33), 84 MADERA_IRQ(DSP3_BUS_ERR, MADERA_IRQ1_STATUS_33), 85 MADERA_IRQ(DSP4_BUS_ERR, MADERA_IRQ1_STATUS_33), 86 MADERA_IRQ(DSP5_BUS_ERR, MADERA_IRQ1_STATUS_33), 87 MADERA_IRQ(DSP6_BUS_ERR, MADERA_IRQ1_STATUS_33), 88 MADERA_IRQ(DSP7_BUS_ERR, MADERA_IRQ1_STATUS_33), 89 }; 90 91 static const struct regmap_irq_chip madera_irq_chip = { 92 .name = "madera IRQ", 93 .status_base = MADERA_IRQ1_STATUS_2, 94 .mask_base = MADERA_IRQ1_MASK_2, 95 .ack_base = MADERA_IRQ1_STATUS_2, 96 .runtime_pm = true, 97 .num_regs = 32, 98 .irqs = madera_irqs, 99 .num_irqs = ARRAY_SIZE(madera_irqs), 100 }; 101 102 #ifdef CONFIG_PM_SLEEP 103 static int madera_suspend(struct device *dev) 104 { 105 struct madera *madera = dev_get_drvdata(dev->parent); 106 107 dev_dbg(madera->irq_dev, "Suspend, disabling IRQ\n"); 108 109 /* 110 * A runtime resume would be needed to access the chip interrupt 111 * controller but runtime pm doesn't function during suspend. 112 * Temporarily disable interrupts until we reach suspend_noirq state. 113 */ 114 disable_irq(madera->irq); 115 116 return 0; 117 } 118 119 static int madera_suspend_noirq(struct device *dev) 120 { 121 struct madera *madera = dev_get_drvdata(dev->parent); 122 123 dev_dbg(madera->irq_dev, "No IRQ suspend, reenabling IRQ\n"); 124 125 /* Re-enable interrupts to service wakeup interrupts from the chip */ 126 enable_irq(madera->irq); 127 128 return 0; 129 } 130 131 static int madera_resume_noirq(struct device *dev) 132 { 133 struct madera *madera = dev_get_drvdata(dev->parent); 134 135 dev_dbg(madera->irq_dev, "No IRQ resume, disabling IRQ\n"); 136 137 /* 138 * We can't handle interrupts until runtime pm is available again. 139 * Disable them temporarily. 140 */ 141 disable_irq(madera->irq); 142 143 return 0; 144 } 145 146 static int madera_resume(struct device *dev) 147 { 148 struct madera *madera = dev_get_drvdata(dev->parent); 149 150 dev_dbg(madera->irq_dev, "Resume, reenabling IRQ\n"); 151 152 /* Interrupts can now be handled */ 153 enable_irq(madera->irq); 154 155 return 0; 156 } 157 #endif 158 159 static const struct dev_pm_ops madera_irq_pm_ops = { 160 SET_SYSTEM_SLEEP_PM_OPS(madera_suspend, madera_resume) 161 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(madera_suspend_noirq, 162 madera_resume_noirq) 163 }; 164 165 static int madera_irq_probe(struct platform_device *pdev) 166 { 167 struct madera *madera = dev_get_drvdata(pdev->dev.parent); 168 struct irq_data *irq_data; 169 unsigned int irq_flags = 0; 170 int ret; 171 172 dev_dbg(&pdev->dev, "probe\n"); 173 174 /* 175 * Read the flags from the interrupt controller if not specified 176 * by pdata 177 */ 178 irq_flags = madera->pdata.irq_flags; 179 if (!irq_flags) { 180 irq_data = irq_get_irq_data(madera->irq); 181 if (!irq_data) { 182 dev_err(&pdev->dev, "Invalid IRQ: %d\n", madera->irq); 183 return -EINVAL; 184 } 185 186 irq_flags = irqd_get_trigger_type(irq_data); 187 188 /* Codec defaults to trigger low, use this if no flags given */ 189 if (irq_flags == IRQ_TYPE_NONE) 190 irq_flags = IRQF_TRIGGER_LOW; 191 } 192 193 if (irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) { 194 dev_err(&pdev->dev, "Host interrupt not level-triggered\n"); 195 return -EINVAL; 196 } 197 198 /* 199 * The silicon always starts at active-low, check if we need to 200 * switch to active-high. 201 */ 202 if (irq_flags & IRQF_TRIGGER_HIGH) { 203 ret = regmap_update_bits(madera->regmap, MADERA_IRQ1_CTRL, 204 MADERA_IRQ_POL_MASK, 0); 205 if (ret) { 206 dev_err(&pdev->dev, 207 "Failed to set IRQ polarity: %d\n", ret); 208 return ret; 209 } 210 } 211 212 /* 213 * NOTE: regmap registers this against the OF node of the parent of 214 * the regmap - that is, against the mfd driver 215 */ 216 ret = regmap_add_irq_chip(madera->regmap, madera->irq, IRQF_ONESHOT, 0, 217 &madera_irq_chip, &madera->irq_data); 218 if (ret) { 219 dev_err(&pdev->dev, "add_irq_chip failed: %d\n", ret); 220 return ret; 221 } 222 223 /* Save dev in parent MFD struct so it is accessible to siblings */ 224 madera->irq_dev = &pdev->dev; 225 226 return 0; 227 } 228 229 static int madera_irq_remove(struct platform_device *pdev) 230 { 231 struct madera *madera = dev_get_drvdata(pdev->dev.parent); 232 233 /* 234 * The IRQ is disabled by the parent MFD driver before 235 * it starts cleaning up all child drivers 236 */ 237 madera->irq_dev = NULL; 238 regmap_del_irq_chip(madera->irq, madera->irq_data); 239 240 return 0; 241 } 242 243 static struct platform_driver madera_irq_driver = { 244 .probe = &madera_irq_probe, 245 .remove = &madera_irq_remove, 246 .driver = { 247 .name = "madera-irq", 248 .pm = &madera_irq_pm_ops, 249 } 250 }; 251 module_platform_driver(madera_irq_driver); 252 253 MODULE_SOFTDEP("pre: madera"); 254 MODULE_DESCRIPTION("Madera IRQ driver"); 255 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); 256 MODULE_LICENSE("GPL v2"); 257