1966cdc96SMark Brown /* 2966cdc96SMark Brown * Arizona interrupt support 3966cdc96SMark Brown * 4966cdc96SMark Brown * Copyright 2012 Wolfson Microelectronics plc 5966cdc96SMark Brown * 6966cdc96SMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7966cdc96SMark Brown * 8966cdc96SMark Brown * This program is free software; you can redistribute it and/or modify 9966cdc96SMark Brown * it under the terms of the GNU General Public License version 2 as 10966cdc96SMark Brown * published by the Free Software Foundation. 11966cdc96SMark Brown */ 12966cdc96SMark Brown 13966cdc96SMark Brown #include <linux/delay.h> 14966cdc96SMark Brown #include <linux/gpio.h> 15966cdc96SMark Brown #include <linux/interrupt.h> 16966cdc96SMark Brown #include <linux/irq.h> 17966cdc96SMark Brown #include <linux/irqdomain.h> 18966cdc96SMark Brown #include <linux/module.h> 19966cdc96SMark Brown #include <linux/pm_runtime.h> 20966cdc96SMark Brown #include <linux/regmap.h> 21966cdc96SMark Brown #include <linux/regulator/consumer.h> 22966cdc96SMark Brown #include <linux/slab.h> 23966cdc96SMark Brown 24966cdc96SMark Brown #include <linux/mfd/arizona/core.h> 25966cdc96SMark Brown #include <linux/mfd/arizona/registers.h> 26966cdc96SMark Brown 27966cdc96SMark Brown #include "arizona.h" 28966cdc96SMark Brown 29966cdc96SMark Brown static int arizona_map_irq(struct arizona *arizona, int irq) 30966cdc96SMark Brown { 31966cdc96SMark Brown int ret; 32966cdc96SMark Brown 33966cdc96SMark Brown ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq); 34966cdc96SMark Brown if (ret < 0) 35966cdc96SMark Brown ret = regmap_irq_get_virq(arizona->irq_chip, irq); 36966cdc96SMark Brown 37966cdc96SMark Brown return ret; 38966cdc96SMark Brown } 39966cdc96SMark Brown 40966cdc96SMark Brown int arizona_request_irq(struct arizona *arizona, int irq, char *name, 41966cdc96SMark Brown irq_handler_t handler, void *data) 42966cdc96SMark Brown { 43966cdc96SMark Brown irq = arizona_map_irq(arizona, irq); 44966cdc96SMark Brown if (irq < 0) 45966cdc96SMark Brown return irq; 46966cdc96SMark Brown 47966cdc96SMark Brown return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, 48966cdc96SMark Brown name, data); 49966cdc96SMark Brown } 50966cdc96SMark Brown EXPORT_SYMBOL_GPL(arizona_request_irq); 51966cdc96SMark Brown 52966cdc96SMark Brown void arizona_free_irq(struct arizona *arizona, int irq, void *data) 53966cdc96SMark Brown { 54966cdc96SMark Brown irq = arizona_map_irq(arizona, irq); 55966cdc96SMark Brown if (irq < 0) 56966cdc96SMark Brown return; 57966cdc96SMark Brown 58966cdc96SMark Brown free_irq(irq, data); 59966cdc96SMark Brown } 60966cdc96SMark Brown EXPORT_SYMBOL_GPL(arizona_free_irq); 61966cdc96SMark Brown 62966cdc96SMark Brown int arizona_set_irq_wake(struct arizona *arizona, int irq, int on) 63966cdc96SMark Brown { 64966cdc96SMark Brown irq = arizona_map_irq(arizona, irq); 65966cdc96SMark Brown if (irq < 0) 66966cdc96SMark Brown return irq; 67966cdc96SMark Brown 68966cdc96SMark Brown return irq_set_irq_wake(irq, on); 69966cdc96SMark Brown } 70966cdc96SMark Brown EXPORT_SYMBOL_GPL(arizona_set_irq_wake); 71966cdc96SMark Brown 72966cdc96SMark Brown static irqreturn_t arizona_boot_done(int irq, void *data) 73966cdc96SMark Brown { 74966cdc96SMark Brown struct arizona *arizona = data; 75966cdc96SMark Brown 76966cdc96SMark Brown dev_dbg(arizona->dev, "Boot done\n"); 77966cdc96SMark Brown 78966cdc96SMark Brown return IRQ_HANDLED; 79966cdc96SMark Brown } 80966cdc96SMark Brown 81966cdc96SMark Brown static irqreturn_t arizona_ctrlif_err(int irq, void *data) 82966cdc96SMark Brown { 83966cdc96SMark Brown struct arizona *arizona = data; 84966cdc96SMark Brown 85966cdc96SMark Brown /* 86966cdc96SMark Brown * For pretty much all potential sources a register cache sync 87966cdc96SMark Brown * won't help, we've just got a software bug somewhere. 88966cdc96SMark Brown */ 89966cdc96SMark Brown dev_err(arizona->dev, "Control interface error\n"); 90966cdc96SMark Brown 91966cdc96SMark Brown return IRQ_HANDLED; 92966cdc96SMark Brown } 93966cdc96SMark Brown 94966cdc96SMark Brown static irqreturn_t arizona_irq_thread(int irq, void *data) 95966cdc96SMark Brown { 96966cdc96SMark Brown struct arizona *arizona = data; 97966cdc96SMark Brown int i, ret; 98966cdc96SMark Brown 99966cdc96SMark Brown ret = pm_runtime_get_sync(arizona->dev); 100966cdc96SMark Brown if (ret < 0) { 101966cdc96SMark Brown dev_err(arizona->dev, "Failed to resume device: %d\n", ret); 102966cdc96SMark Brown return IRQ_NONE; 103966cdc96SMark Brown } 104966cdc96SMark Brown 105966cdc96SMark Brown /* Check both domains */ 106966cdc96SMark Brown for (i = 0; i < 2; i++) 107966cdc96SMark Brown handle_nested_irq(irq_find_mapping(arizona->virq, i)); 108966cdc96SMark Brown 109966cdc96SMark Brown pm_runtime_mark_last_busy(arizona->dev); 110966cdc96SMark Brown pm_runtime_put_autosuspend(arizona->dev); 111966cdc96SMark Brown 112966cdc96SMark Brown return IRQ_HANDLED; 113966cdc96SMark Brown } 114966cdc96SMark Brown 115966cdc96SMark Brown static void arizona_irq_enable(struct irq_data *data) 116966cdc96SMark Brown { 117966cdc96SMark Brown } 118966cdc96SMark Brown 119966cdc96SMark Brown static void arizona_irq_disable(struct irq_data *data) 120966cdc96SMark Brown { 121966cdc96SMark Brown } 122966cdc96SMark Brown 123966cdc96SMark Brown static struct irq_chip arizona_irq_chip = { 124966cdc96SMark Brown .name = "arizona", 125966cdc96SMark Brown .irq_disable = arizona_irq_disable, 126966cdc96SMark Brown .irq_enable = arizona_irq_enable, 127966cdc96SMark Brown }; 128966cdc96SMark Brown 129966cdc96SMark Brown static int arizona_irq_map(struct irq_domain *h, unsigned int virq, 130966cdc96SMark Brown irq_hw_number_t hw) 131966cdc96SMark Brown { 132966cdc96SMark Brown struct regmap_irq_chip_data *data = h->host_data; 133966cdc96SMark Brown 134966cdc96SMark Brown irq_set_chip_data(virq, data); 135966cdc96SMark Brown irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_edge_irq); 136966cdc96SMark Brown irq_set_nested_thread(virq, 1); 137966cdc96SMark Brown 138966cdc96SMark Brown /* ARM needs us to explicitly flag the IRQ as valid 139966cdc96SMark Brown * and will set them noprobe when we do so. */ 140966cdc96SMark Brown #ifdef CONFIG_ARM 141966cdc96SMark Brown set_irq_flags(virq, IRQF_VALID); 142966cdc96SMark Brown #else 143966cdc96SMark Brown irq_set_noprobe(virq); 144966cdc96SMark Brown #endif 145966cdc96SMark Brown 146966cdc96SMark Brown return 0; 147966cdc96SMark Brown } 148966cdc96SMark Brown 149966cdc96SMark Brown static struct irq_domain_ops arizona_domain_ops = { 150966cdc96SMark Brown .map = arizona_irq_map, 151966cdc96SMark Brown .xlate = irq_domain_xlate_twocell, 152966cdc96SMark Brown }; 153966cdc96SMark Brown 154966cdc96SMark Brown int arizona_irq_init(struct arizona *arizona) 155966cdc96SMark Brown { 156966cdc96SMark Brown int flags = IRQF_ONESHOT; 157966cdc96SMark Brown int ret, i; 158966cdc96SMark Brown const struct regmap_irq_chip *aod, *irq; 159966cdc96SMark Brown 160966cdc96SMark Brown switch (arizona->type) { 161863df8d5SMark Brown #ifdef CONFIG_MFD_WM5102 162966cdc96SMark Brown case WM5102: 163966cdc96SMark Brown aod = &wm5102_aod; 164966cdc96SMark Brown irq = &wm5102_irq; 165966cdc96SMark Brown break; 166863df8d5SMark Brown #endif 167966cdc96SMark Brown default: 168966cdc96SMark Brown BUG_ON("Unknown Arizona class device" == NULL); 169966cdc96SMark Brown return -EINVAL; 170966cdc96SMark Brown } 171966cdc96SMark Brown 172966cdc96SMark Brown if (arizona->pdata.irq_active_high) { 173966cdc96SMark Brown ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1, 174966cdc96SMark Brown ARIZONA_IRQ_POL, 0); 175966cdc96SMark Brown if (ret != 0) { 176966cdc96SMark Brown dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n", 177966cdc96SMark Brown ret); 178966cdc96SMark Brown goto err; 179966cdc96SMark Brown } 180966cdc96SMark Brown 181966cdc96SMark Brown flags |= IRQF_TRIGGER_HIGH; 182966cdc96SMark Brown } else { 183966cdc96SMark Brown flags |= IRQF_TRIGGER_LOW; 184966cdc96SMark Brown } 185966cdc96SMark Brown 186966cdc96SMark Brown /* Allocate a virtual IRQ domain to distribute to the regmap domains */ 187966cdc96SMark Brown arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops, 188966cdc96SMark Brown arizona); 189966cdc96SMark Brown if (!arizona->virq) { 190966cdc96SMark Brown ret = -EINVAL; 191966cdc96SMark Brown goto err; 192966cdc96SMark Brown } 193966cdc96SMark Brown 194966cdc96SMark Brown ret = regmap_add_irq_chip(arizona->regmap, 195966cdc96SMark Brown irq_create_mapping(arizona->virq, 0), 196966cdc96SMark Brown IRQF_ONESHOT, -1, aod, 197966cdc96SMark Brown &arizona->aod_irq_chip); 198966cdc96SMark Brown if (ret != 0) { 199966cdc96SMark Brown dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret); 200966cdc96SMark Brown goto err_domain; 201966cdc96SMark Brown } 202966cdc96SMark Brown 203966cdc96SMark Brown ret = regmap_add_irq_chip(arizona->regmap, 204966cdc96SMark Brown irq_create_mapping(arizona->virq, 1), 205966cdc96SMark Brown IRQF_ONESHOT, -1, irq, 206966cdc96SMark Brown &arizona->irq_chip); 207966cdc96SMark Brown if (ret != 0) { 208966cdc96SMark Brown dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret); 209966cdc96SMark Brown goto err_aod; 210966cdc96SMark Brown } 211966cdc96SMark Brown 212966cdc96SMark Brown /* Make sure the boot done IRQ is unmasked for resumes */ 213966cdc96SMark Brown i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE); 214966cdc96SMark Brown ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT, 215966cdc96SMark Brown "Boot done", arizona); 216966cdc96SMark Brown if (ret != 0) { 217966cdc96SMark Brown dev_err(arizona->dev, "Failed to request boot done %d: %d\n", 218966cdc96SMark Brown arizona->irq, ret); 219966cdc96SMark Brown goto err_boot_done; 220966cdc96SMark Brown } 221966cdc96SMark Brown 222966cdc96SMark Brown /* Handle control interface errors in the core */ 223966cdc96SMark Brown i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR); 224966cdc96SMark Brown ret = request_threaded_irq(i, NULL, arizona_ctrlif_err, IRQF_ONESHOT, 225966cdc96SMark Brown "Control interface error", arizona); 226966cdc96SMark Brown if (ret != 0) { 227966cdc96SMark Brown dev_err(arizona->dev, "Failed to request boot done %d: %d\n", 228966cdc96SMark Brown arizona->irq, ret); 229966cdc96SMark Brown goto err_ctrlif; 230966cdc96SMark Brown } 231966cdc96SMark Brown 232966cdc96SMark Brown ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread, 233966cdc96SMark Brown flags, "arizona", arizona); 234966cdc96SMark Brown 235966cdc96SMark Brown if (ret != 0) { 236966cdc96SMark Brown dev_err(arizona->dev, "Failed to request IRQ %d: %d\n", 237966cdc96SMark Brown arizona->irq, ret); 238966cdc96SMark Brown goto err_main_irq; 239966cdc96SMark Brown } 240966cdc96SMark Brown 241966cdc96SMark Brown return 0; 242966cdc96SMark Brown 243966cdc96SMark Brown err_main_irq: 244966cdc96SMark Brown free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona); 245966cdc96SMark Brown err_ctrlif: 246966cdc96SMark Brown free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona); 247966cdc96SMark Brown err_boot_done: 248966cdc96SMark Brown regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1), 249966cdc96SMark Brown arizona->irq_chip); 250966cdc96SMark Brown err_aod: 251966cdc96SMark Brown regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0), 252966cdc96SMark Brown arizona->aod_irq_chip); 253966cdc96SMark Brown err_domain: 254966cdc96SMark Brown err: 255966cdc96SMark Brown return ret; 256966cdc96SMark Brown } 257966cdc96SMark Brown 258966cdc96SMark Brown int arizona_irq_exit(struct arizona *arizona) 259966cdc96SMark Brown { 260966cdc96SMark Brown free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona); 261966cdc96SMark Brown free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona); 262966cdc96SMark Brown regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1), 263966cdc96SMark Brown arizona->irq_chip); 264966cdc96SMark Brown regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0), 265966cdc96SMark Brown arizona->aod_irq_chip); 266966cdc96SMark Brown free_irq(arizona->irq, arizona); 267966cdc96SMark Brown 268966cdc96SMark Brown return 0; 269966cdc96SMark Brown } 270