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452 lines
11 KiB
452 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Arizona interrupt support |
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* |
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* Copyright 2012 Wolfson Microelectronics plc |
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* |
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* Author: Mark Brown <[email protected]> |
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*/ |
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#include <linux/delay.h> |
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#include <linux/gpio.h> |
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#include <linux/interrupt.h> |
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#include <linux/irq.h> |
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#include <linux/irqdomain.h> |
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#include <linux/module.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/slab.h> |
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#include <linux/mfd/arizona/core.h> |
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#include <linux/mfd/arizona/registers.h> |
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#include "arizona.h" |
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#define ARIZONA_AOD_IRQ_INDEX 0 |
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#define ARIZONA_MAIN_IRQ_INDEX 1 |
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static int arizona_map_irq(struct arizona *arizona, int irq) |
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{ |
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int ret; |
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if (arizona->aod_irq_chip) { |
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ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq); |
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if (ret >= 0) |
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return ret; |
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} |
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return regmap_irq_get_virq(arizona->irq_chip, irq); |
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} |
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int arizona_request_irq(struct arizona *arizona, int irq, char *name, |
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irq_handler_t handler, void *data) |
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{ |
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irq = arizona_map_irq(arizona, irq); |
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if (irq < 0) |
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return irq; |
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return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, |
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name, data); |
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} |
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EXPORT_SYMBOL_GPL(arizona_request_irq); |
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void arizona_free_irq(struct arizona *arizona, int irq, void *data) |
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{ |
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irq = arizona_map_irq(arizona, irq); |
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if (irq < 0) |
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return; |
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free_irq(irq, data); |
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} |
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EXPORT_SYMBOL_GPL(arizona_free_irq); |
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int arizona_set_irq_wake(struct arizona *arizona, int irq, int on) |
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{ |
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irq = arizona_map_irq(arizona, irq); |
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if (irq < 0) |
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return irq; |
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return irq_set_irq_wake(irq, on); |
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} |
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EXPORT_SYMBOL_GPL(arizona_set_irq_wake); |
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static irqreturn_t arizona_boot_done(int irq, void *data) |
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{ |
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struct arizona *arizona = data; |
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dev_dbg(arizona->dev, "Boot done\n"); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t arizona_ctrlif_err(int irq, void *data) |
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{ |
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struct arizona *arizona = data; |
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/* |
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* For pretty much all potential sources a register cache sync |
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* won't help, we've just got a software bug somewhere. |
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*/ |
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dev_err(arizona->dev, "Control interface error\n"); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t arizona_irq_thread(int irq, void *data) |
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{ |
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struct arizona *arizona = data; |
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bool poll; |
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unsigned int val; |
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int ret; |
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ret = pm_runtime_resume_and_get(arizona->dev); |
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if (ret < 0) { |
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dev_err(arizona->dev, "Failed to resume device: %d\n", ret); |
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return IRQ_NONE; |
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} |
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do { |
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poll = false; |
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if (arizona->aod_irq_chip) { |
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/* |
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* Check the AOD status register to determine whether |
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* the nested IRQ handler should be called. |
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*/ |
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ret = regmap_read(arizona->regmap, |
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ARIZONA_AOD_IRQ1, &val); |
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if (ret) |
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dev_warn(arizona->dev, |
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"Failed to read AOD IRQ1 %d\n", ret); |
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else if (val) |
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handle_nested_irq( |
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irq_find_mapping(arizona->virq, 0)); |
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} |
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/* |
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* Check if one of the main interrupts is asserted and only |
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* check that domain if it is. |
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*/ |
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ret = regmap_read(arizona->regmap, ARIZONA_IRQ_PIN_STATUS, |
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&val); |
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if (ret == 0 && val & ARIZONA_IRQ1_STS) { |
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handle_nested_irq(irq_find_mapping(arizona->virq, 1)); |
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} else if (ret != 0) { |
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dev_err(arizona->dev, |
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"Failed to read main IRQ status: %d\n", ret); |
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} |
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/* |
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* Poll the IRQ pin status to see if we're really done |
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* if the interrupt controller can't do it for us. |
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*/ |
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if (!arizona->pdata.irq_gpio) { |
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break; |
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} else if (arizona->pdata.irq_flags & IRQF_TRIGGER_RISING && |
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gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { |
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poll = true; |
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} else if (arizona->pdata.irq_flags & IRQF_TRIGGER_FALLING && |
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!gpio_get_value_cansleep(arizona->pdata.irq_gpio)) { |
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poll = true; |
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} |
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} while (poll); |
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pm_runtime_mark_last_busy(arizona->dev); |
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pm_runtime_put_autosuspend(arizona->dev); |
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return IRQ_HANDLED; |
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} |
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static void arizona_irq_enable(struct irq_data *data) |
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{ |
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} |
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static void arizona_irq_disable(struct irq_data *data) |
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{ |
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} |
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static int arizona_irq_set_wake(struct irq_data *data, unsigned int on) |
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{ |
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struct arizona *arizona = irq_data_get_irq_chip_data(data); |
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return irq_set_irq_wake(arizona->irq, on); |
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} |
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static struct irq_chip arizona_irq_chip = { |
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.name = "arizona", |
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.irq_disable = arizona_irq_disable, |
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.irq_enable = arizona_irq_enable, |
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.irq_set_wake = arizona_irq_set_wake, |
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}; |
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static struct lock_class_key arizona_irq_lock_class; |
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static struct lock_class_key arizona_irq_request_class; |
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static int arizona_irq_map(struct irq_domain *h, unsigned int virq, |
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irq_hw_number_t hw) |
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{ |
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struct arizona *data = h->host_data; |
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irq_set_chip_data(virq, data); |
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irq_set_lockdep_class(virq, &arizona_irq_lock_class, |
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&arizona_irq_request_class); |
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irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_simple_irq); |
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irq_set_nested_thread(virq, 1); |
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irq_set_noprobe(virq); |
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return 0; |
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} |
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static const struct irq_domain_ops arizona_domain_ops = { |
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.map = arizona_irq_map, |
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.xlate = irq_domain_xlate_twocell, |
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}; |
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int arizona_irq_init(struct arizona *arizona) |
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{ |
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int flags = IRQF_ONESHOT; |
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int ret; |
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const struct regmap_irq_chip *aod, *irq; |
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struct irq_data *irq_data; |
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unsigned int virq; |
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arizona->ctrlif_error = true; |
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switch (arizona->type) { |
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#ifdef CONFIG_MFD_WM5102 |
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case WM5102: |
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aod = &wm5102_aod; |
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irq = &wm5102_irq; |
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arizona->ctrlif_error = false; |
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break; |
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#endif |
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#ifdef CONFIG_MFD_WM5110 |
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case WM5110: |
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case WM8280: |
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aod = &wm5110_aod; |
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switch (arizona->rev) { |
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case 0 ... 2: |
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irq = &wm5110_irq; |
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break; |
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default: |
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irq = &wm5110_revd_irq; |
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break; |
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} |
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arizona->ctrlif_error = false; |
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break; |
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#endif |
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#ifdef CONFIG_MFD_CS47L24 |
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case WM1831: |
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case CS47L24: |
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aod = NULL; |
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irq = &cs47l24_irq; |
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arizona->ctrlif_error = false; |
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break; |
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#endif |
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#ifdef CONFIG_MFD_WM8997 |
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case WM8997: |
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aod = &wm8997_aod; |
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irq = &wm8997_irq; |
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arizona->ctrlif_error = false; |
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break; |
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#endif |
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#ifdef CONFIG_MFD_WM8998 |
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case WM8998: |
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case WM1814: |
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aod = &wm8998_aod; |
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irq = &wm8998_irq; |
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arizona->ctrlif_error = false; |
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break; |
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#endif |
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default: |
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BUG_ON("Unknown Arizona class device" == NULL); |
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return -EINVAL; |
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} |
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/* Disable all wake sources by default */ |
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regmap_write(arizona->regmap, ARIZONA_WAKE_CONTROL, 0); |
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/* Read the flags from the interrupt controller if not specified */ |
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if (!arizona->pdata.irq_flags) { |
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irq_data = irq_get_irq_data(arizona->irq); |
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if (!irq_data) { |
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dev_err(arizona->dev, "Invalid IRQ: %d\n", |
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arizona->irq); |
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return -EINVAL; |
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} |
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arizona->pdata.irq_flags = irqd_get_trigger_type(irq_data); |
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switch (arizona->pdata.irq_flags) { |
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case IRQF_TRIGGER_LOW: |
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case IRQF_TRIGGER_HIGH: |
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case IRQF_TRIGGER_RISING: |
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case IRQF_TRIGGER_FALLING: |
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break; |
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case IRQ_TYPE_NONE: |
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default: |
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/* Device default */ |
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arizona->pdata.irq_flags = IRQF_TRIGGER_LOW; |
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break; |
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} |
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} |
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if (arizona->pdata.irq_flags & (IRQF_TRIGGER_HIGH | |
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IRQF_TRIGGER_RISING)) { |
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ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1, |
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ARIZONA_IRQ_POL, 0); |
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if (ret != 0) { |
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dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n", |
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ret); |
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goto err; |
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} |
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} |
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flags |= arizona->pdata.irq_flags; |
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/* Allocate a virtual IRQ domain to distribute to the regmap domains */ |
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arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops, |
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arizona); |
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if (!arizona->virq) { |
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dev_err(arizona->dev, "Failed to add core IRQ domain\n"); |
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ret = -EINVAL; |
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goto err; |
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} |
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if (aod) { |
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virq = irq_create_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX); |
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if (!virq) { |
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dev_err(arizona->dev, "Failed to map AOD IRQs\n"); |
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ret = -EINVAL; |
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goto err_domain; |
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} |
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ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT, |
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0, aod, &arizona->aod_irq_chip); |
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if (ret != 0) { |
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dev_err(arizona->dev, |
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"Failed to add AOD IRQs: %d\n", ret); |
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goto err_map_aod; |
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} |
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} |
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virq = irq_create_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX); |
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if (!virq) { |
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dev_err(arizona->dev, "Failed to map main IRQs\n"); |
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ret = -EINVAL; |
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goto err_aod; |
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} |
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ret = regmap_add_irq_chip(arizona->regmap, virq, IRQF_ONESHOT, |
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0, irq, &arizona->irq_chip); |
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if (ret != 0) { |
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dev_err(arizona->dev, "Failed to add main IRQs: %d\n", ret); |
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goto err_map_main_irq; |
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} |
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/* Used to emulate edge trigger and to work around broken pinmux */ |
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if (arizona->pdata.irq_gpio) { |
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if (gpio_to_irq(arizona->pdata.irq_gpio) != arizona->irq) { |
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dev_warn(arizona->dev, "IRQ %d is not GPIO %d (%d)\n", |
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arizona->irq, arizona->pdata.irq_gpio, |
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gpio_to_irq(arizona->pdata.irq_gpio)); |
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arizona->irq = gpio_to_irq(arizona->pdata.irq_gpio); |
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} |
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ret = devm_gpio_request_one(arizona->dev, |
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arizona->pdata.irq_gpio, |
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GPIOF_IN, "arizona IRQ"); |
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if (ret != 0) { |
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dev_err(arizona->dev, |
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"Failed to request IRQ GPIO %d:: %d\n", |
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arizona->pdata.irq_gpio, ret); |
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arizona->pdata.irq_gpio = 0; |
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} |
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} |
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ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread, |
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flags, "arizona", arizona); |
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if (ret != 0) { |
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dev_err(arizona->dev, "Failed to request primary IRQ %d: %d\n", |
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arizona->irq, ret); |
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goto err_main_irq; |
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} |
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/* Make sure the boot done IRQ is unmasked for resumes */ |
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ret = arizona_request_irq(arizona, ARIZONA_IRQ_BOOT_DONE, "Boot done", |
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arizona_boot_done, arizona); |
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if (ret != 0) { |
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dev_err(arizona->dev, "Failed to request boot done %d: %d\n", |
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arizona->irq, ret); |
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goto err_boot_done; |
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} |
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/* Handle control interface errors in the core */ |
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if (arizona->ctrlif_error) { |
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ret = arizona_request_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, |
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"Control interface error", |
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arizona_ctrlif_err, arizona); |
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if (ret != 0) { |
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dev_err(arizona->dev, |
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"Failed to request CTRLIF_ERR %d: %d\n", |
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arizona->irq, ret); |
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goto err_ctrlif; |
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} |
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} |
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return 0; |
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err_ctrlif: |
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arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona); |
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err_boot_done: |
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free_irq(arizona->irq, arizona); |
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err_main_irq: |
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regmap_del_irq_chip(irq_find_mapping(arizona->virq, |
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ARIZONA_MAIN_IRQ_INDEX), |
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arizona->irq_chip); |
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err_map_main_irq: |
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irq_dispose_mapping(irq_find_mapping(arizona->virq, |
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ARIZONA_MAIN_IRQ_INDEX)); |
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err_aod: |
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regmap_del_irq_chip(irq_find_mapping(arizona->virq, |
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ARIZONA_AOD_IRQ_INDEX), |
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arizona->aod_irq_chip); |
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err_map_aod: |
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irq_dispose_mapping(irq_find_mapping(arizona->virq, |
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ARIZONA_AOD_IRQ_INDEX)); |
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err_domain: |
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irq_domain_remove(arizona->virq); |
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err: |
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return ret; |
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} |
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int arizona_irq_exit(struct arizona *arizona) |
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{ |
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unsigned int virq; |
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if (arizona->ctrlif_error) |
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arizona_free_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR, arizona); |
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arizona_free_irq(arizona, ARIZONA_IRQ_BOOT_DONE, arizona); |
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virq = irq_find_mapping(arizona->virq, ARIZONA_MAIN_IRQ_INDEX); |
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regmap_del_irq_chip(virq, arizona->irq_chip); |
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irq_dispose_mapping(virq); |
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virq = irq_find_mapping(arizona->virq, ARIZONA_AOD_IRQ_INDEX); |
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regmap_del_irq_chip(virq, arizona->aod_irq_chip); |
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irq_dispose_mapping(virq); |
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irq_domain_remove(arizona->virq); |
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free_irq(arizona->irq, arizona); |
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return 0; |
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}
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