diff options
Diffstat (limited to 'arch/arm/mach-lpc32xx/irq.c')
| -rw-r--r-- | arch/arm/mach-lpc32xx/irq.c | 477 |
1 files changed, 0 insertions, 477 deletions
diff --git a/arch/arm/mach-lpc32xx/irq.c b/arch/arm/mach-lpc32xx/irq.c deleted file mode 100644 index 2ae431e8b..000000000 --- a/arch/arm/mach-lpc32xx/irq.c +++ /dev/null @@ -1,477 +0,0 @@ -/* - * arch/arm/mach-lpc32xx/irq.c - * - * Author: Kevin Wells <kevin.wells@nxp.com> - * - * Copyright (C) 2010 NXP Semiconductors - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/irqdomain.h> -#include <linux/module.h> - -#include <mach/irqs.h> -#include <mach/hardware.h> -#include <mach/platform.h> -#include "common.h" - -/* - * Default value representing the Activation polarity of all internal - * interrupt sources - */ -#define MIC_APR_DEFAULT 0x3FF0EFE0 -#define SIC1_APR_DEFAULT 0xFBD27186 -#define SIC2_APR_DEFAULT 0x801810C0 - -/* - * Default value representing the Activation Type of all internal - * interrupt sources. All are level sensitive. - */ -#define MIC_ATR_DEFAULT 0x00000000 -#define SIC1_ATR_DEFAULT 0x00026000 -#define SIC2_ATR_DEFAULT 0x00000000 - -static struct irq_domain *lpc32xx_mic_domain; -static struct device_node *lpc32xx_mic_np; - -struct lpc32xx_event_group_regs { - void __iomem *enab_reg; - void __iomem *edge_reg; - void __iomem *maskstat_reg; - void __iomem *rawstat_reg; -}; - -static const struct lpc32xx_event_group_regs lpc32xx_event_int_regs = { - .enab_reg = LPC32XX_CLKPWR_INT_ER, - .edge_reg = LPC32XX_CLKPWR_INT_AP, - .maskstat_reg = LPC32XX_CLKPWR_INT_SR, - .rawstat_reg = LPC32XX_CLKPWR_INT_RS, -}; - -static const struct lpc32xx_event_group_regs lpc32xx_event_pin_regs = { - .enab_reg = LPC32XX_CLKPWR_PIN_ER, - .edge_reg = LPC32XX_CLKPWR_PIN_AP, - .maskstat_reg = LPC32XX_CLKPWR_PIN_SR, - .rawstat_reg = LPC32XX_CLKPWR_PIN_RS, -}; - -struct lpc32xx_event_info { - const struct lpc32xx_event_group_regs *event_group; - u32 mask; -}; - -/* - * Maps an IRQ number to and event mask and register - */ -static const struct lpc32xx_event_info lpc32xx_events[NR_IRQS] = { - [IRQ_LPC32XX_GPI_08] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_08_BIT, - }, - [IRQ_LPC32XX_GPI_09] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_09_BIT, - }, - [IRQ_LPC32XX_GPI_19] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_19_BIT, - }, - [IRQ_LPC32XX_GPI_07] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_07_BIT, - }, - [IRQ_LPC32XX_GPI_00] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_00_BIT, - }, - [IRQ_LPC32XX_GPI_01] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_01_BIT, - }, - [IRQ_LPC32XX_GPI_02] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_02_BIT, - }, - [IRQ_LPC32XX_GPI_03] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_03_BIT, - }, - [IRQ_LPC32XX_GPI_04] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_04_BIT, - }, - [IRQ_LPC32XX_GPI_05] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_05_BIT, - }, - [IRQ_LPC32XX_GPI_06] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_06_BIT, - }, - [IRQ_LPC32XX_GPI_28] = { - .event_group = &lpc32xx_event_pin_regs, - .mask = LPC32XX_CLKPWR_EXTSRC_GPI_28_BIT, - }, - [IRQ_LPC32XX_GPIO_00] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_GPIO_00_BIT, - }, - [IRQ_LPC32XX_GPIO_01] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_GPIO_01_BIT, - }, - [IRQ_LPC32XX_GPIO_02] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_GPIO_02_BIT, - }, - [IRQ_LPC32XX_GPIO_03] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_GPIO_03_BIT, - }, - [IRQ_LPC32XX_GPIO_04] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_GPIO_04_BIT, - }, - [IRQ_LPC32XX_GPIO_05] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_GPIO_05_BIT, - }, - [IRQ_LPC32XX_KEY] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_KEY_BIT, - }, - [IRQ_LPC32XX_ETHERNET] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_MAC_BIT, - }, - [IRQ_LPC32XX_USB_OTG_ATX] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_USBATXINT_BIT, - }, - [IRQ_LPC32XX_USB_HOST] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_USB_BIT, - }, - [IRQ_LPC32XX_RTC] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_RTC_BIT, - }, - [IRQ_LPC32XX_MSTIMER] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_MSTIMER_BIT, - }, - [IRQ_LPC32XX_TS_AUX] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_TS_AUX_BIT, - }, - [IRQ_LPC32XX_TS_P] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_TS_P_BIT, - }, - [IRQ_LPC32XX_TS_IRQ] = { - .event_group = &lpc32xx_event_int_regs, - .mask = LPC32XX_CLKPWR_INTSRC_ADC_BIT, - }, -}; - -static void get_controller(unsigned int irq, unsigned int *base, - unsigned int *irqbit) -{ - if (irq < 32) { - *base = LPC32XX_MIC_BASE; - *irqbit = 1 << irq; - } else if (irq < 64) { - *base = LPC32XX_SIC1_BASE; - *irqbit = 1 << (irq - 32); - } else { - *base = LPC32XX_SIC2_BASE; - *irqbit = 1 << (irq - 64); - } -} - -static void lpc32xx_mask_irq(struct irq_data *d) -{ - unsigned int reg, ctrl, mask; - - get_controller(d->hwirq, &ctrl, &mask); - - reg = __raw_readl(LPC32XX_INTC_MASK(ctrl)) & ~mask; - __raw_writel(reg, LPC32XX_INTC_MASK(ctrl)); -} - -static void lpc32xx_unmask_irq(struct irq_data *d) -{ - unsigned int reg, ctrl, mask; - - get_controller(d->hwirq, &ctrl, &mask); - - reg = __raw_readl(LPC32XX_INTC_MASK(ctrl)) | mask; - __raw_writel(reg, LPC32XX_INTC_MASK(ctrl)); -} - -static void lpc32xx_ack_irq(struct irq_data *d) -{ - unsigned int ctrl, mask; - - get_controller(d->hwirq, &ctrl, &mask); - - __raw_writel(mask, LPC32XX_INTC_RAW_STAT(ctrl)); - - /* Also need to clear pending wake event */ - if (lpc32xx_events[d->hwirq].mask != 0) - __raw_writel(lpc32xx_events[d->hwirq].mask, - lpc32xx_events[d->hwirq].event_group->rawstat_reg); -} - -static void __lpc32xx_set_irq_type(unsigned int irq, int use_high_level, - int use_edge) -{ - unsigned int reg, ctrl, mask; - - get_controller(irq, &ctrl, &mask); - - /* Activation level, high or low */ - reg = __raw_readl(LPC32XX_INTC_POLAR(ctrl)); - if (use_high_level) - reg |= mask; - else - reg &= ~mask; - __raw_writel(reg, LPC32XX_INTC_POLAR(ctrl)); - - /* Activation type, edge or level */ - reg = __raw_readl(LPC32XX_INTC_ACT_TYPE(ctrl)); - if (use_edge) - reg |= mask; - else - reg &= ~mask; - __raw_writel(reg, LPC32XX_INTC_ACT_TYPE(ctrl)); - - /* Use same polarity for the wake events */ - if (lpc32xx_events[irq].mask != 0) { - reg = __raw_readl(lpc32xx_events[irq].event_group->edge_reg); - - if (use_high_level) - reg |= lpc32xx_events[irq].mask; - else - reg &= ~lpc32xx_events[irq].mask; - - __raw_writel(reg, lpc32xx_events[irq].event_group->edge_reg); - } -} - -static int lpc32xx_set_irq_type(struct irq_data *d, unsigned int type) -{ - switch (type) { - case IRQ_TYPE_EDGE_RISING: - /* Rising edge sensitive */ - __lpc32xx_set_irq_type(d->hwirq, 1, 1); - irq_set_handler_locked(d, handle_edge_irq); - break; - - case IRQ_TYPE_EDGE_FALLING: - /* Falling edge sensitive */ - __lpc32xx_set_irq_type(d->hwirq, 0, 1); - irq_set_handler_locked(d, handle_edge_irq); - break; - - case IRQ_TYPE_LEVEL_LOW: - /* Low level sensitive */ - __lpc32xx_set_irq_type(d->hwirq, 0, 0); - irq_set_handler_locked(d, handle_level_irq); - break; - - case IRQ_TYPE_LEVEL_HIGH: - /* High level sensitive */ - __lpc32xx_set_irq_type(d->hwirq, 1, 0); - irq_set_handler_locked(d, handle_level_irq); - break; - - /* Other modes are not supported */ - default: - return -EINVAL; - } - - return 0; -} - -static int lpc32xx_irq_wake(struct irq_data *d, unsigned int state) -{ - unsigned long eventreg; - - if (lpc32xx_events[d->hwirq].mask != 0) { - eventreg = __raw_readl(lpc32xx_events[d->hwirq]. - event_group->enab_reg); - - if (state) - eventreg |= lpc32xx_events[d->hwirq].mask; - else { - eventreg &= ~lpc32xx_events[d->hwirq].mask; - - /* - * When disabling the wakeup, clear the latched - * event - */ - __raw_writel(lpc32xx_events[d->hwirq].mask, - lpc32xx_events[d->hwirq]. - event_group->rawstat_reg); - } - - __raw_writel(eventreg, - lpc32xx_events[d->hwirq].event_group->enab_reg); - - return 0; - } - - /* Clear event */ - __raw_writel(lpc32xx_events[d->hwirq].mask, - lpc32xx_events[d->hwirq].event_group->rawstat_reg); - - return -ENODEV; -} - -static void __init lpc32xx_set_default_mappings(unsigned int apr, - unsigned int atr, unsigned int offset) -{ - unsigned int i; - - /* Set activation levels for each interrupt */ - i = 0; - while (i < 32) { - __lpc32xx_set_irq_type(offset + i, ((apr >> i) & 0x1), - ((atr >> i) & 0x1)); - i++; - } -} - -static struct irq_chip lpc32xx_irq_chip = { - .name = "MIC", - .irq_ack = lpc32xx_ack_irq, - .irq_mask = lpc32xx_mask_irq, - .irq_unmask = lpc32xx_unmask_irq, - .irq_set_type = lpc32xx_set_irq_type, - .irq_set_wake = lpc32xx_irq_wake -}; - -static void lpc32xx_sic1_handler(struct irq_desc *desc) -{ - unsigned long ints = __raw_readl(LPC32XX_INTC_STAT(LPC32XX_SIC1_BASE)); - - while (ints != 0) { - int irqno = fls(ints) - 1; - - ints &= ~(1 << irqno); - - generic_handle_irq(LPC32XX_SIC1_IRQ(irqno)); - } -} - -static void lpc32xx_sic2_handler(struct irq_desc *desc) -{ - unsigned long ints = __raw_readl(LPC32XX_INTC_STAT(LPC32XX_SIC2_BASE)); - - while (ints != 0) { - int irqno = fls(ints) - 1; - - ints &= ~(1 << irqno); - - generic_handle_irq(LPC32XX_SIC2_IRQ(irqno)); - } -} - -static int __init __lpc32xx_mic_of_init(struct device_node *node, - struct device_node *parent) -{ - lpc32xx_mic_np = node; - - return 0; -} - -static const struct of_device_id mic_of_match[] __initconst = { - { .compatible = "nxp,lpc3220-mic", .data = __lpc32xx_mic_of_init }, - { } -}; - -void __init lpc32xx_init_irq(void) -{ - unsigned int i; - - /* Setup MIC */ - __raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_MIC_BASE)); - __raw_writel(MIC_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_MIC_BASE)); - __raw_writel(MIC_ATR_DEFAULT, LPC32XX_INTC_ACT_TYPE(LPC32XX_MIC_BASE)); - - /* Setup SIC1 */ - __raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_SIC1_BASE)); - __raw_writel(SIC1_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_SIC1_BASE)); - __raw_writel(SIC1_ATR_DEFAULT, - LPC32XX_INTC_ACT_TYPE(LPC32XX_SIC1_BASE)); - - /* Setup SIC2 */ - __raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_SIC2_BASE)); - __raw_writel(SIC2_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_SIC2_BASE)); - __raw_writel(SIC2_ATR_DEFAULT, - LPC32XX_INTC_ACT_TYPE(LPC32XX_SIC2_BASE)); - - /* Configure supported IRQ's */ - for (i = 0; i < NR_IRQS; i++) { - irq_set_chip_and_handler(i, &lpc32xx_irq_chip, - handle_level_irq); - irq_clear_status_flags(i, IRQ_NOREQUEST); - } - - /* Set default mappings */ - lpc32xx_set_default_mappings(MIC_APR_DEFAULT, MIC_ATR_DEFAULT, 0); - lpc32xx_set_default_mappings(SIC1_APR_DEFAULT, SIC1_ATR_DEFAULT, 32); - lpc32xx_set_default_mappings(SIC2_APR_DEFAULT, SIC2_ATR_DEFAULT, 64); - - /* Initially disable all wake events */ - __raw_writel(0, LPC32XX_CLKPWR_P01_ER); - __raw_writel(0, LPC32XX_CLKPWR_INT_ER); - __raw_writel(0, LPC32XX_CLKPWR_PIN_ER); - - /* - * Default wake activation polarities, all pin sources are low edge - * triggered - */ - __raw_writel(LPC32XX_CLKPWR_INTSRC_TS_P_BIT | - LPC32XX_CLKPWR_INTSRC_MSTIMER_BIT | - LPC32XX_CLKPWR_INTSRC_RTC_BIT, - LPC32XX_CLKPWR_INT_AP); - __raw_writel(0, LPC32XX_CLKPWR_PIN_AP); - - /* Clear latched wake event states */ - __raw_writel(__raw_readl(LPC32XX_CLKPWR_PIN_RS), - LPC32XX_CLKPWR_PIN_RS); - __raw_writel(__raw_readl(LPC32XX_CLKPWR_INT_RS), - LPC32XX_CLKPWR_INT_RS); - - of_irq_init(mic_of_match); - - lpc32xx_mic_domain = irq_domain_add_legacy(lpc32xx_mic_np, NR_IRQS, - 0, 0, &irq_domain_simple_ops, - NULL); - if (!lpc32xx_mic_domain) - panic("Unable to add MIC irq domain\n"); - - /* MIC SUBIRQx interrupts will route handling to the chain handlers */ - irq_set_chained_handler(IRQ_LPC32XX_SUB1IRQ, lpc32xx_sic1_handler); - irq_set_chained_handler(IRQ_LPC32XX_SUB2IRQ, lpc32xx_sic2_handler); -} |