| /* |
| * wm8350-irq.c -- IRQ support for Wolfson WM8350 |
| * |
| * Copyright 2007, 2008, 2009 Wolfson Microelectronics PLC. |
| * |
| * Author: Liam Girdwood, Mark Brown |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/bug.h> |
| #include <linux/device.h> |
| #include <linux/interrupt.h> |
| #include <linux/workqueue.h> |
| |
| #include <linux/mfd/wm8350/core.h> |
| #include <linux/mfd/wm8350/audio.h> |
| #include <linux/mfd/wm8350/comparator.h> |
| #include <linux/mfd/wm8350/gpio.h> |
| #include <linux/mfd/wm8350/pmic.h> |
| #include <linux/mfd/wm8350/rtc.h> |
| #include <linux/mfd/wm8350/supply.h> |
| #include <linux/mfd/wm8350/wdt.h> |
| |
| #define WM8350_NUM_IRQ_REGS 7 |
| |
| #define WM8350_INT_OFFSET_1 0 |
| #define WM8350_INT_OFFSET_2 1 |
| #define WM8350_POWER_UP_INT_OFFSET 2 |
| #define WM8350_UNDER_VOLTAGE_INT_OFFSET 3 |
| #define WM8350_OVER_CURRENT_INT_OFFSET 4 |
| #define WM8350_GPIO_INT_OFFSET 5 |
| #define WM8350_COMPARATOR_INT_OFFSET 6 |
| |
| struct wm8350_irq_data { |
| int primary; |
| int reg; |
| int mask; |
| int primary_only; |
| }; |
| |
| static struct wm8350_irq_data wm8350_irqs[] = { |
| [WM8350_IRQ_OC_LS] = { |
| .primary = WM8350_OC_INT, |
| .reg = WM8350_OVER_CURRENT_INT_OFFSET, |
| .mask = WM8350_OC_LS_EINT, |
| .primary_only = 1, |
| }, |
| [WM8350_IRQ_UV_DC1] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_DC1_EINT, |
| }, |
| [WM8350_IRQ_UV_DC2] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_DC2_EINT, |
| }, |
| [WM8350_IRQ_UV_DC3] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_DC3_EINT, |
| }, |
| [WM8350_IRQ_UV_DC4] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_DC4_EINT, |
| }, |
| [WM8350_IRQ_UV_DC5] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_DC5_EINT, |
| }, |
| [WM8350_IRQ_UV_DC6] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_DC6_EINT, |
| }, |
| [WM8350_IRQ_UV_LDO1] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_LDO1_EINT, |
| }, |
| [WM8350_IRQ_UV_LDO2] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_LDO2_EINT, |
| }, |
| [WM8350_IRQ_UV_LDO3] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_LDO3_EINT, |
| }, |
| [WM8350_IRQ_UV_LDO4] = { |
| .primary = WM8350_UV_INT, |
| .reg = WM8350_UNDER_VOLTAGE_INT_OFFSET, |
| .mask = WM8350_UV_LDO4_EINT, |
| }, |
| [WM8350_IRQ_CHG_BAT_HOT] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_BAT_HOT_EINT, |
| }, |
| [WM8350_IRQ_CHG_BAT_COLD] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_BAT_COLD_EINT, |
| }, |
| [WM8350_IRQ_CHG_BAT_FAIL] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_BAT_FAIL_EINT, |
| }, |
| [WM8350_IRQ_CHG_TO] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_TO_EINT, |
| }, |
| [WM8350_IRQ_CHG_END] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_END_EINT, |
| }, |
| [WM8350_IRQ_CHG_START] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_START_EINT, |
| }, |
| [WM8350_IRQ_CHG_FAST_RDY] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_FAST_RDY_EINT, |
| }, |
| [WM8350_IRQ_CHG_VBATT_LT_3P9] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_VBATT_LT_3P9_EINT, |
| }, |
| [WM8350_IRQ_CHG_VBATT_LT_3P1] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_VBATT_LT_3P1_EINT, |
| }, |
| [WM8350_IRQ_CHG_VBATT_LT_2P85] = { |
| .primary = WM8350_CHG_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_CHG_VBATT_LT_2P85_EINT, |
| }, |
| [WM8350_IRQ_RTC_ALM] = { |
| .primary = WM8350_RTC_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_RTC_ALM_EINT, |
| }, |
| [WM8350_IRQ_RTC_SEC] = { |
| .primary = WM8350_RTC_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_RTC_SEC_EINT, |
| }, |
| [WM8350_IRQ_RTC_PER] = { |
| .primary = WM8350_RTC_INT, |
| .reg = WM8350_INT_OFFSET_1, |
| .mask = WM8350_RTC_PER_EINT, |
| }, |
| [WM8350_IRQ_CS1] = { |
| .primary = WM8350_CS_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_CS1_EINT, |
| }, |
| [WM8350_IRQ_CS2] = { |
| .primary = WM8350_CS_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_CS2_EINT, |
| }, |
| [WM8350_IRQ_SYS_HYST_COMP_FAIL] = { |
| .primary = WM8350_SYS_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_SYS_HYST_COMP_FAIL_EINT, |
| }, |
| [WM8350_IRQ_SYS_CHIP_GT115] = { |
| .primary = WM8350_SYS_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_SYS_CHIP_GT115_EINT, |
| }, |
| [WM8350_IRQ_SYS_CHIP_GT140] = { |
| .primary = WM8350_SYS_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_SYS_CHIP_GT140_EINT, |
| }, |
| [WM8350_IRQ_SYS_WDOG_TO] = { |
| .primary = WM8350_SYS_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_SYS_WDOG_TO_EINT, |
| }, |
| [WM8350_IRQ_AUXADC_DATARDY] = { |
| .primary = WM8350_AUXADC_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_AUXADC_DATARDY_EINT, |
| }, |
| [WM8350_IRQ_AUXADC_DCOMP4] = { |
| .primary = WM8350_AUXADC_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_AUXADC_DCOMP4_EINT, |
| }, |
| [WM8350_IRQ_AUXADC_DCOMP3] = { |
| .primary = WM8350_AUXADC_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_AUXADC_DCOMP3_EINT, |
| }, |
| [WM8350_IRQ_AUXADC_DCOMP2] = { |
| .primary = WM8350_AUXADC_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_AUXADC_DCOMP2_EINT, |
| }, |
| [WM8350_IRQ_AUXADC_DCOMP1] = { |
| .primary = WM8350_AUXADC_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_AUXADC_DCOMP1_EINT, |
| }, |
| [WM8350_IRQ_USB_LIMIT] = { |
| .primary = WM8350_USB_INT, |
| .reg = WM8350_INT_OFFSET_2, |
| .mask = WM8350_USB_LIMIT_EINT, |
| .primary_only = 1, |
| }, |
| [WM8350_IRQ_WKUP_OFF_STATE] = { |
| .primary = WM8350_WKUP_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_WKUP_OFF_STATE_EINT, |
| }, |
| [WM8350_IRQ_WKUP_HIB_STATE] = { |
| .primary = WM8350_WKUP_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_WKUP_HIB_STATE_EINT, |
| }, |
| [WM8350_IRQ_WKUP_CONV_FAULT] = { |
| .primary = WM8350_WKUP_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_WKUP_CONV_FAULT_EINT, |
| }, |
| [WM8350_IRQ_WKUP_WDOG_RST] = { |
| .primary = WM8350_WKUP_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_WKUP_WDOG_RST_EINT, |
| }, |
| [WM8350_IRQ_WKUP_GP_PWR_ON] = { |
| .primary = WM8350_WKUP_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_WKUP_GP_PWR_ON_EINT, |
| }, |
| [WM8350_IRQ_WKUP_ONKEY] = { |
| .primary = WM8350_WKUP_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_WKUP_ONKEY_EINT, |
| }, |
| [WM8350_IRQ_WKUP_GP_WAKEUP] = { |
| .primary = WM8350_WKUP_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_WKUP_GP_WAKEUP_EINT, |
| }, |
| [WM8350_IRQ_CODEC_JCK_DET_L] = { |
| .primary = WM8350_CODEC_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_CODEC_JCK_DET_L_EINT, |
| }, |
| [WM8350_IRQ_CODEC_JCK_DET_R] = { |
| .primary = WM8350_CODEC_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_CODEC_JCK_DET_R_EINT, |
| }, |
| [WM8350_IRQ_CODEC_MICSCD] = { |
| .primary = WM8350_CODEC_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_CODEC_MICSCD_EINT, |
| }, |
| [WM8350_IRQ_CODEC_MICD] = { |
| .primary = WM8350_CODEC_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_CODEC_MICD_EINT, |
| }, |
| [WM8350_IRQ_EXT_USB_FB] = { |
| .primary = WM8350_EXT_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_EXT_USB_FB_EINT, |
| }, |
| [WM8350_IRQ_EXT_WALL_FB] = { |
| .primary = WM8350_EXT_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_EXT_WALL_FB_EINT, |
| }, |
| [WM8350_IRQ_EXT_BAT_FB] = { |
| .primary = WM8350_EXT_INT, |
| .reg = WM8350_COMPARATOR_INT_OFFSET, |
| .mask = WM8350_EXT_BAT_FB_EINT, |
| }, |
| [WM8350_IRQ_GPIO(0)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP0_EINT, |
| }, |
| [WM8350_IRQ_GPIO(1)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP1_EINT, |
| }, |
| [WM8350_IRQ_GPIO(2)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP2_EINT, |
| }, |
| [WM8350_IRQ_GPIO(3)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP3_EINT, |
| }, |
| [WM8350_IRQ_GPIO(4)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP4_EINT, |
| }, |
| [WM8350_IRQ_GPIO(5)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP5_EINT, |
| }, |
| [WM8350_IRQ_GPIO(6)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP6_EINT, |
| }, |
| [WM8350_IRQ_GPIO(7)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP7_EINT, |
| }, |
| [WM8350_IRQ_GPIO(8)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP8_EINT, |
| }, |
| [WM8350_IRQ_GPIO(9)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP9_EINT, |
| }, |
| [WM8350_IRQ_GPIO(10)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP10_EINT, |
| }, |
| [WM8350_IRQ_GPIO(11)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP11_EINT, |
| }, |
| [WM8350_IRQ_GPIO(12)] = { |
| .primary = WM8350_GP_INT, |
| .reg = WM8350_GPIO_INT_OFFSET, |
| .mask = WM8350_GP12_EINT, |
| }, |
| }; |
| |
| static void wm8350_irq_call_handler(struct wm8350 *wm8350, int irq) |
| { |
| mutex_lock(&wm8350->irq_mutex); |
| |
| if (wm8350->irq[irq].handler) |
| wm8350->irq[irq].handler(irq, wm8350->irq[irq].data); |
| else { |
| dev_err(wm8350->dev, "irq %d nobody cared. now masked.\n", |
| irq); |
| wm8350_mask_irq(wm8350, irq); |
| } |
| |
| mutex_unlock(&wm8350->irq_mutex); |
| } |
| |
| /* |
| * This is a threaded IRQ handler so can access I2C/SPI. Since all |
| * interrupts are clear on read the IRQ line will be reasserted and |
| * the physical IRQ will be handled again if another interrupt is |
| * asserted while we run - in the normal course of events this is a |
| * rare occurrence so we save I2C/SPI reads. |
| */ |
| static irqreturn_t wm8350_irq(int irq, void *irq_data) |
| { |
| struct wm8350 *wm8350 = irq_data; |
| u16 level_one; |
| u16 sub_reg[WM8350_NUM_IRQ_REGS]; |
| int read_done[WM8350_NUM_IRQ_REGS]; |
| struct wm8350_irq_data *data; |
| int i; |
| |
| /* TODO: Use block reads to improve performance? */ |
| level_one = wm8350_reg_read(wm8350, WM8350_SYSTEM_INTERRUPTS) |
| & ~wm8350_reg_read(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK); |
| |
| if (!level_one) |
| return IRQ_NONE; |
| |
| memset(&read_done, 0, sizeof(read_done)); |
| |
| for (i = 0; i < ARRAY_SIZE(wm8350_irqs); i++) { |
| data = &wm8350_irqs[i]; |
| |
| if (!(level_one & data->primary)) |
| continue; |
| |
| if (!read_done[data->reg]) { |
| sub_reg[data->reg] = |
| wm8350_reg_read(wm8350, WM8350_INT_STATUS_1 + |
| data->reg); |
| sub_reg[data->reg] &= |
| ~wm8350_reg_read(wm8350, |
| WM8350_INT_STATUS_1_MASK + |
| data->reg); |
| read_done[data->reg] = 1; |
| } |
| |
| if (sub_reg[data->reg] & data->mask) |
| wm8350_irq_call_handler(wm8350, i); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| int wm8350_register_irq(struct wm8350 *wm8350, int irq, |
| irq_handler_t handler, unsigned long flags, |
| const char *name, void *data) |
| { |
| if (irq < 0 || irq >= WM8350_NUM_IRQ || !handler) |
| return -EINVAL; |
| |
| if (wm8350->irq[irq].handler) |
| return -EBUSY; |
| |
| mutex_lock(&wm8350->irq_mutex); |
| wm8350->irq[irq].handler = handler; |
| wm8350->irq[irq].data = data; |
| mutex_unlock(&wm8350->irq_mutex); |
| |
| wm8350_unmask_irq(wm8350, irq); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(wm8350_register_irq); |
| |
| int wm8350_free_irq(struct wm8350 *wm8350, int irq) |
| { |
| if (irq < 0 || irq >= WM8350_NUM_IRQ) |
| return -EINVAL; |
| |
| wm8350_mask_irq(wm8350, irq); |
| |
| mutex_lock(&wm8350->irq_mutex); |
| wm8350->irq[irq].handler = NULL; |
| mutex_unlock(&wm8350->irq_mutex); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(wm8350_free_irq); |
| |
| int wm8350_mask_irq(struct wm8350 *wm8350, int irq) |
| { |
| return wm8350_set_bits(wm8350, WM8350_INT_STATUS_1_MASK + |
| wm8350_irqs[irq].reg, |
| wm8350_irqs[irq].mask); |
| } |
| EXPORT_SYMBOL_GPL(wm8350_mask_irq); |
| |
| int wm8350_unmask_irq(struct wm8350 *wm8350, int irq) |
| { |
| return wm8350_clear_bits(wm8350, WM8350_INT_STATUS_1_MASK + |
| wm8350_irqs[irq].reg, |
| wm8350_irqs[irq].mask); |
| } |
| EXPORT_SYMBOL_GPL(wm8350_unmask_irq); |
| |
| int wm8350_irq_init(struct wm8350 *wm8350, int irq, |
| struct wm8350_platform_data *pdata) |
| { |
| int ret; |
| int flags = IRQF_ONESHOT; |
| |
| if (!irq) { |
| dev_err(wm8350->dev, "No IRQ configured\n"); |
| return -EINVAL; |
| } |
| |
| wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0xFFFF); |
| wm8350_reg_write(wm8350, WM8350_INT_STATUS_1_MASK, 0xFFFF); |
| wm8350_reg_write(wm8350, WM8350_INT_STATUS_2_MASK, 0xFFFF); |
| wm8350_reg_write(wm8350, WM8350_UNDER_VOLTAGE_INT_STATUS_MASK, 0xFFFF); |
| wm8350_reg_write(wm8350, WM8350_GPIO_INT_STATUS_MASK, 0xFFFF); |
| wm8350_reg_write(wm8350, WM8350_COMPARATOR_INT_STATUS_MASK, 0xFFFF); |
| |
| mutex_init(&wm8350->irq_mutex); |
| wm8350->chip_irq = irq; |
| |
| if (pdata && pdata->irq_high) { |
| flags |= IRQF_TRIGGER_HIGH; |
| |
| wm8350_set_bits(wm8350, WM8350_SYSTEM_CONTROL_1, |
| WM8350_IRQ_POL); |
| } else { |
| flags |= IRQF_TRIGGER_LOW; |
| |
| wm8350_clear_bits(wm8350, WM8350_SYSTEM_CONTROL_1, |
| WM8350_IRQ_POL); |
| } |
| |
| ret = request_threaded_irq(irq, NULL, wm8350_irq, flags, |
| "wm8350", wm8350); |
| if (ret != 0) |
| dev_err(wm8350->dev, "Failed to request IRQ: %d\n", ret); |
| |
| return ret; |
| } |
| |
| int wm8350_irq_exit(struct wm8350 *wm8350) |
| { |
| free_irq(wm8350->chip_irq, wm8350); |
| return 0; |
| } |
