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119 lines
3.0 KiB
119 lines
3.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// Copyright 2008 Openmoko, Inc. |
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// Copyright 2008 Simtec Electronics |
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// Ben Dooks <[email protected]> |
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// http://armlinux.simtec.co.uk/ |
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// |
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// S3C64XX - Interrupt handling Power Management |
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/* |
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* NOTE: Code in this file is not used when booting with Device Tree support. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/syscore_ops.h> |
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#include <linux/interrupt.h> |
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#include <linux/serial_core.h> |
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#include <linux/serial_s3c.h> |
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#include <linux/irq.h> |
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#include <linux/io.h> |
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#include <linux/of.h> |
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#include "map.h" |
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#include "regs-gpio.h" |
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#include "cpu.h" |
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#include "pm.h" |
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/* We handled all the IRQ types in this code, to save having to make several |
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* small files to handle each different type separately. Having the EINT_GRP |
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* code here shouldn't be as much bloat as the IRQ table space needed when |
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* they are enabled. The added benefit is we ensure that these registers are |
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* in the same state as we suspended. |
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*/ |
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static struct sleep_save irq_save[] = { |
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SAVE_ITEM(S3C64XX_PRIORITY), |
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SAVE_ITEM(S3C64XX_EINT0CON0), |
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SAVE_ITEM(S3C64XX_EINT0CON1), |
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SAVE_ITEM(S3C64XX_EINT0FLTCON0), |
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SAVE_ITEM(S3C64XX_EINT0FLTCON1), |
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SAVE_ITEM(S3C64XX_EINT0FLTCON2), |
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SAVE_ITEM(S3C64XX_EINT0FLTCON3), |
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SAVE_ITEM(S3C64XX_EINT0MASK), |
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}; |
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static struct irq_grp_save { |
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u32 fltcon; |
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u32 con; |
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u32 mask; |
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} eint_grp_save[5]; |
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#ifndef CONFIG_SERIAL_SAMSUNG_UARTS |
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#define SERIAL_SAMSUNG_UARTS 0 |
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#else |
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#define SERIAL_SAMSUNG_UARTS CONFIG_SERIAL_SAMSUNG_UARTS |
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#endif |
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static u32 irq_uart_mask[SERIAL_SAMSUNG_UARTS]; |
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static int s3c64xx_irq_pm_suspend(void) |
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{ |
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struct irq_grp_save *grp = eint_grp_save; |
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int i; |
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S3C_PMDBG("%s: suspending IRQs\n", __func__); |
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s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save)); |
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for (i = 0; i < SERIAL_SAMSUNG_UARTS; i++) |
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irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM); |
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for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) { |
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grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4)); |
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grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4)); |
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grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4)); |
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} |
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return 0; |
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} |
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static void s3c64xx_irq_pm_resume(void) |
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{ |
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struct irq_grp_save *grp = eint_grp_save; |
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int i; |
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S3C_PMDBG("%s: resuming IRQs\n", __func__); |
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s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save)); |
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for (i = 0; i < SERIAL_SAMSUNG_UARTS; i++) |
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__raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM); |
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for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) { |
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__raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4)); |
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__raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4)); |
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__raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4)); |
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} |
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S3C_PMDBG("%s: IRQ configuration restored\n", __func__); |
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} |
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static struct syscore_ops s3c64xx_irq_syscore_ops = { |
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.suspend = s3c64xx_irq_pm_suspend, |
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.resume = s3c64xx_irq_pm_resume, |
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}; |
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static __init int s3c64xx_syscore_init(void) |
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{ |
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/* Appropriate drivers (pinctrl, uart) handle this when using DT. */ |
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if (of_have_populated_dt() || !soc_is_s3c64xx()) |
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return 0; |
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register_syscore_ops(&s3c64xx_irq_syscore_ops); |
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return 0; |
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} |
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core_initcall(s3c64xx_syscore_init);
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