From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/arm/mach-imx/tzic.c | 220 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 220 insertions(+) create mode 100644 arch/arm/mach-imx/tzic.c (limited to 'arch/arm/mach-imx/tzic.c') diff --git a/arch/arm/mach-imx/tzic.c b/arch/arm/mach-imx/tzic.c new file mode 100644 index 000000000..8b3d98d28 --- /dev/null +++ b/arch/arm/mach-imx/tzic.c @@ -0,0 +1,220 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C)2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "common.h" +#include "hardware.h" +#include "irq-common.h" + +/* + ***************************************** + * TZIC Registers * + ***************************************** + */ + +#define TZIC_INTCNTL 0x0000 /* Control register */ +#define TZIC_INTTYPE 0x0004 /* Controller Type register */ +#define TZIC_IMPID 0x0008 /* Distributor Implementer Identification */ +#define TZIC_PRIOMASK 0x000C /* Priority Mask Reg */ +#define TZIC_SYNCCTRL 0x0010 /* Synchronizer Control register */ +#define TZIC_DSMINT 0x0014 /* DSM interrupt Holdoffregister */ +#define TZIC_INTSEC0(i) (0x0080 + ((i) << 2)) /* Interrupt Security Reg 0 */ +#define TZIC_ENSET0(i) (0x0100 + ((i) << 2)) /* Enable Set Reg 0 */ +#define TZIC_ENCLEAR0(i) (0x0180 + ((i) << 2)) /* Enable Clear Reg 0 */ +#define TZIC_SRCSET0 0x0200 /* Source Set Register 0 */ +#define TZIC_SRCCLAR0 0x0280 /* Source Clear Register 0 */ +#define TZIC_PRIORITY0 0x0400 /* Priority Register 0 */ +#define TZIC_PND0 0x0D00 /* Pending Register 0 */ +#define TZIC_HIPND(i) (0x0D80+ ((i) << 2)) /* High Priority Pending Register */ +#define TZIC_WAKEUP0(i) (0x0E00 + ((i) << 2)) /* Wakeup Config Register */ +#define TZIC_SWINT 0x0F00 /* Software Interrupt Rigger Register */ +#define TZIC_ID0 0x0FD0 /* Indentification Register 0 */ + +static void __iomem *tzic_base; +static struct irq_domain *domain; + +#define TZIC_NUM_IRQS 128 + +#ifdef CONFIG_FIQ +static int tzic_set_irq_fiq(unsigned int hwirq, unsigned int type) +{ + unsigned int index, mask, value; + + index = hwirq >> 5; + if (unlikely(index >= 4)) + return -EINVAL; + mask = 1U << (hwirq & 0x1F); + + value = imx_readl(tzic_base + TZIC_INTSEC0(index)) | mask; + if (type) + value &= ~mask; + imx_writel(value, tzic_base + TZIC_INTSEC0(index)); + + return 0; +} +#else +#define tzic_set_irq_fiq NULL +#endif + +#ifdef CONFIG_PM +static void tzic_irq_suspend(struct irq_data *d) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + int idx = d->hwirq >> 5; + + imx_writel(gc->wake_active, tzic_base + TZIC_WAKEUP0(idx)); +} + +static void tzic_irq_resume(struct irq_data *d) +{ + int idx = d->hwirq >> 5; + + imx_writel(imx_readl(tzic_base + TZIC_ENSET0(idx)), + tzic_base + TZIC_WAKEUP0(idx)); +} + +#else +#define tzic_irq_suspend NULL +#define tzic_irq_resume NULL +#endif + +static struct mxc_extra_irq tzic_extra_irq = { +#ifdef CONFIG_FIQ + .set_irq_fiq = tzic_set_irq_fiq, +#endif +}; + +static __init void tzic_init_gc(int idx, unsigned int irq_start) +{ + struct irq_chip_generic *gc; + struct irq_chip_type *ct; + + gc = irq_alloc_generic_chip("tzic", 1, irq_start, tzic_base, + handle_level_irq); + gc->private = &tzic_extra_irq; + gc->wake_enabled = IRQ_MSK(32); + + ct = gc->chip_types; + ct->chip.irq_mask = irq_gc_mask_disable_reg; + ct->chip.irq_unmask = irq_gc_unmask_enable_reg; + ct->chip.irq_set_wake = irq_gc_set_wake; + ct->chip.irq_suspend = tzic_irq_suspend; + ct->chip.irq_resume = tzic_irq_resume; + ct->regs.disable = TZIC_ENCLEAR0(idx); + ct->regs.enable = TZIC_ENSET0(idx); + + irq_setup_generic_chip(gc, IRQ_MSK(32), 0, IRQ_NOREQUEST, 0); +} + +static void __exception_irq_entry tzic_handle_irq(struct pt_regs *regs) +{ + u32 stat; + int i, irqofs, handled; + + do { + handled = 0; + + for (i = 0; i < 4; i++) { + stat = imx_readl(tzic_base + TZIC_HIPND(i)) & + imx_readl(tzic_base + TZIC_INTSEC0(i)); + + while (stat) { + handled = 1; + irqofs = fls(stat) - 1; + generic_handle_domain_irq(domain, irqofs + i * 32); + stat &= ~(1 << irqofs); + } + } + } while (handled); +} + +/* + * This function initializes the TZIC hardware and disables all the + * interrupts. It registers the interrupt enable and disable functions + * to the kernel for each interrupt source. + */ +static int __init tzic_init_dt(struct device_node *np, struct device_node *p) +{ + int irq_base; + int i; + + tzic_base = of_iomap(np, 0); + WARN_ON(!tzic_base); + + /* put the TZIC into the reset value with + * all interrupts disabled + */ + i = imx_readl(tzic_base + TZIC_INTCNTL); + + imx_writel(0x80010001, tzic_base + TZIC_INTCNTL); + imx_writel(0x1f, tzic_base + TZIC_PRIOMASK); + imx_writel(0x02, tzic_base + TZIC_SYNCCTRL); + + for (i = 0; i < 4; i++) + imx_writel(0xFFFFFFFF, tzic_base + TZIC_INTSEC0(i)); + + /* disable all interrupts */ + for (i = 0; i < 4; i++) + imx_writel(0xFFFFFFFF, tzic_base + TZIC_ENCLEAR0(i)); + + /* all IRQ no FIQ Warning :: No selection */ + + irq_base = irq_alloc_descs(-1, 0, TZIC_NUM_IRQS, numa_node_id()); + WARN_ON(irq_base < 0); + + domain = irq_domain_add_legacy(np, TZIC_NUM_IRQS, irq_base, 0, + &irq_domain_simple_ops, NULL); + WARN_ON(!domain); + + for (i = 0; i < 4; i++, irq_base += 32) + tzic_init_gc(i, irq_base); + + set_handle_irq(tzic_handle_irq); + +#ifdef CONFIG_FIQ + /* Initialize FIQ */ + init_FIQ(FIQ_START); +#endif + + pr_info("TrustZone Interrupt Controller (TZIC) initialized\n"); + + return 0; +} +IRQCHIP_DECLARE(tzic, "fsl,tzic", tzic_init_dt); + +/** + * tzic_enable_wake() - enable wakeup interrupt + * + * @return 0 if successful; non-zero otherwise + * + * This function provides an interrupt synchronization point that is required + * by tzic enabled platforms before entering imx specific low power modes (ie, + * those low power modes beyond the WAIT_CLOCKED basic ARM WFI only mode). + */ +int tzic_enable_wake(void) +{ + unsigned int i; + + imx_writel(1, tzic_base + TZIC_DSMINT); + if (unlikely(imx_readl(tzic_base + TZIC_DSMINT) == 0)) + return -EAGAIN; + + for (i = 0; i < 4; i++) + imx_writel(imx_readl(tzic_base + TZIC_ENSET0(i)), + tzic_base + TZIC_WAKEUP0(i)); + + return 0; +} -- cgit v1.2.3