// SPDX-License-Identifier: GPL-2.0 /* * Device driver for irqs in HISI PMIC IC * * Copyright (c) 2013 Linaro Ltd. * Copyright (c) 2011 Hisilicon. * Copyright (c) 2020-2021 Huawei Technologies Co., Ltd. */ #include #include #include #include #include #include #include #include #include struct hi6421v600_irq { struct device *dev; struct irq_domain *domain; int irq; unsigned int *irqs; struct regmap *regmap; /* Protect IRQ mask changes */ spinlock_t lock; }; enum hi6421v600_irq_list { OTMP = 0, VBUS_CONNECT, VBUS_DISCONNECT, ALARMON_R, HOLD_6S, HOLD_1S, POWERKEY_UP, POWERKEY_DOWN, OCP_SCP_R, COUL_R, SIM0_HPD_R, SIM0_HPD_F, SIM1_HPD_R, SIM1_HPD_F, PMIC_IRQ_LIST_MAX }; #define HISI_IRQ_BANK_SIZE 2 /* * IRQ number for the power key button and mask for both UP and DOWN IRQs */ #define HISI_POWERKEY_IRQ_NUM 0 #define HISI_IRQ_POWERKEY_UP_DOWN (BIT(POWERKEY_DOWN) | BIT(POWERKEY_UP)) /* * Registers for IRQ address and IRQ mask bits * * Please notice that we need to regmap a larger region, as other * registers are used by the irqs. * See drivers/irq/hi6421-irq.c. */ #define SOC_PMIC_IRQ_MASK_0_ADDR 0x0202 #define SOC_PMIC_IRQ0_ADDR 0x0212 /* * The IRQs are mapped as: * * ====================== ============= ============ ===== * IRQ MASK REGISTER IRQ REGISTER BIT * ====================== ============= ============ ===== * OTMP 0x0202 0x212 bit 0 * VBUS_CONNECT 0x0202 0x212 bit 1 * VBUS_DISCONNECT 0x0202 0x212 bit 2 * ALARMON_R 0x0202 0x212 bit 3 * HOLD_6S 0x0202 0x212 bit 4 * HOLD_1S 0x0202 0x212 bit 5 * POWERKEY_UP 0x0202 0x212 bit 6 * POWERKEY_DOWN 0x0202 0x212 bit 7 * * OCP_SCP_R 0x0203 0x213 bit 0 * COUL_R 0x0203 0x213 bit 1 * SIM0_HPD_R 0x0203 0x213 bit 2 * SIM0_HPD_F 0x0203 0x213 bit 3 * SIM1_HPD_R 0x0203 0x213 bit 4 * SIM1_HPD_F 0x0203 0x213 bit 5 * ====================== ============= ============ ===== * * Each mask register contains 8 bits. The ancillary macros below * convert a number from 0 to 14 into a register address and a bit mask */ #define HISI_IRQ_MASK_REG(irq_data) (SOC_PMIC_IRQ_MASK_0_ADDR + \ (irqd_to_hwirq(irq_data) / BITS_PER_BYTE)) #define HISI_IRQ_MASK_BIT(irq_data) BIT(irqd_to_hwirq(irq_data) & (BITS_PER_BYTE - 1)) #define HISI_8BITS_MASK 0xff static irqreturn_t hi6421v600_irq_handler(int irq, void *__priv) { struct hi6421v600_irq *priv = __priv; unsigned long pending; unsigned int in; int i, offset; for (i = 0; i < HISI_IRQ_BANK_SIZE; i++) { regmap_read(priv->regmap, SOC_PMIC_IRQ0_ADDR + i, &in); /* Mark pending IRQs as handled */ regmap_write(priv->regmap, SOC_PMIC_IRQ0_ADDR + i, in); pending = in & HISI_8BITS_MASK; if (i == HISI_POWERKEY_IRQ_NUM && (pending & HISI_IRQ_POWERKEY_UP_DOWN) == HISI_IRQ_POWERKEY_UP_DOWN) { /* * If both powerkey down and up IRQs are received, * handle them at the right order */ generic_handle_irq(priv->irqs[POWERKEY_DOWN]); generic_handle_irq(priv->irqs[POWERKEY_UP]); pending &= ~HISI_IRQ_POWERKEY_UP_DOWN; } if (!pending) continue; for_each_set_bit(offset, &pending, BITS_PER_BYTE) { generic_handle_irq(priv->irqs[offset + i * BITS_PER_BYTE]); } } return IRQ_HANDLED; } static void hi6421v600_irq_mask(struct irq_data *d) { struct hi6421v600_irq *priv = irq_data_get_irq_chip_data(d); unsigned long flags; unsigned int data; u32 offset; offset = HISI_IRQ_MASK_REG(d); spin_lock_irqsave(&priv->lock, flags); regmap_read(priv->regmap, offset, &data); data |= HISI_IRQ_MASK_BIT(d); regmap_write(priv->regmap, offset, data); spin_unlock_irqrestore(&priv->lock, flags); } static void hi6421v600_irq_unmask(struct irq_data *d) { struct hi6421v600_irq *priv = irq_data_get_irq_chip_data(d); u32 data, offset; unsigned long flags; offset = HISI_IRQ_MASK_REG(d); spin_lock_irqsave(&priv->lock, flags); regmap_read(priv->regmap, offset, &data); data &= ~HISI_IRQ_MASK_BIT(d); regmap_write(priv->regmap, offset, data); spin_unlock_irqrestore(&priv->lock, flags); } static struct irq_chip hi6421v600_pmu_irqchip = { .name = "hi6421v600-irq", .irq_mask = hi6421v600_irq_mask, .irq_unmask = hi6421v600_irq_unmask, .irq_disable = hi6421v600_irq_mask, .irq_enable = hi6421v600_irq_unmask, }; static int hi6421v600_irq_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw) { struct hi6421v600_irq *priv = d->host_data; irq_set_chip_and_handler_name(virq, &hi6421v600_pmu_irqchip, handle_simple_irq, "hi6421v600"); irq_set_chip_data(virq, priv); irq_set_irq_type(virq, IRQ_TYPE_NONE); return 0; } static const struct irq_domain_ops hi6421v600_domain_ops = { .map = hi6421v600_irq_map, .xlate = irq_domain_xlate_twocell, }; static void hi6421v600_irq_init(struct hi6421v600_irq *priv) { int i; unsigned int pending; /* Mask all IRQs */ for (i = 0; i < HISI_IRQ_BANK_SIZE; i++) regmap_write(priv->regmap, SOC_PMIC_IRQ_MASK_0_ADDR + i, HISI_8BITS_MASK); /* Mark all IRQs as handled */ for (i = 0; i < HISI_IRQ_BANK_SIZE; i++) { regmap_read(priv->regmap, SOC_PMIC_IRQ0_ADDR + i, &pending); regmap_write(priv->regmap, SOC_PMIC_IRQ0_ADDR + i, HISI_8BITS_MASK); } } static int hi6421v600_irq_probe(struct platform_device *pdev) { struct device *pmic_dev = pdev->dev.parent; struct device_node *np = pmic_dev->of_node; struct platform_device *pmic_pdev; struct device *dev = &pdev->dev; struct hi6421v600_irq *priv; struct regmap *regmap; unsigned int virq; int i, ret; /* * This driver is meant to be called by hi6421-spmi-core, * which should first set drvdata. If this doesn't happen, hit * a warn on and return. */ regmap = dev_get_drvdata(pmic_dev); if (WARN_ON(!regmap)) return -ENODEV; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->dev = dev; priv->regmap = regmap; spin_lock_init(&priv->lock); pmic_pdev = container_of(pmic_dev, struct platform_device, dev); priv->irq = platform_get_irq(pmic_pdev, 0); if (priv->irq < 0) { dev_err(dev, "Error %d when getting IRQs\n", priv->irq); return priv->irq; } platform_set_drvdata(pdev, priv); hi6421v600_irq_init(priv); priv->irqs = devm_kzalloc(dev, PMIC_IRQ_LIST_MAX * sizeof(int), GFP_KERNEL); if (!priv->irqs) return -ENOMEM; priv->domain = irq_domain_add_simple(np, PMIC_IRQ_LIST_MAX, 0, &hi6421v600_domain_ops, priv); if (!priv->domain) { dev_err(dev, "Failed to create IRQ domain\n"); return -ENODEV; } for (i = 0; i < PMIC_IRQ_LIST_MAX; i++) { virq = irq_create_mapping(priv->domain, i); if (!virq) { dev_err(dev, "Failed to map H/W IRQ\n"); return -ENODEV; } priv->irqs[i] = virq; } ret = devm_request_threaded_irq(dev, priv->irq, hi6421v600_irq_handler, NULL, IRQF_TRIGGER_LOW | IRQF_SHARED | IRQF_NO_SUSPEND, "pmic", priv); if (ret < 0) { dev_err(dev, "Failed to start IRQ handling thread: error %d\n", ret); return ret; } return 0; } static const struct platform_device_id hi6421v600_irq_table[] = { { .name = "hi6421v600-irq" }, {}, }; MODULE_DEVICE_TABLE(platform, hi6421v600_irq_table); static struct platform_driver hi6421v600_irq_driver = { .id_table = hi6421v600_irq_table, .driver = { .name = "hi6421v600-irq", }, .probe = hi6421v600_irq_probe, }; module_platform_driver(hi6421v600_irq_driver); MODULE_DESCRIPTION("HiSilicon Hi6421v600 IRQ driver"); MODULE_LICENSE("GPL v2");