| // SPDX-License-Identifier: GPL-2.0 | |
| /* | |
| * R8A7740 processor support | |
| * | |
| * Copyright (C) 2011 Renesas Solutions Corp. | |
| * Copyright (C) 2011 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | |
| */ | |
| #include <linux/kernel.h> | |
| #include <linux/init.h> | |
| #include <linux/io.h> | |
| #include <linux/irqchip.h> | |
| #include <linux/irqchip/arm-gic.h> | |
| #include <asm/mach/map.h> | |
| #include <asm/mach/arch.h> | |
| #include <asm/mach/time.h> | |
| #include "common.h" | |
| /* | |
| * r8a7740 chip has lasting errata on MERAM buffer. | |
| * this is work-around for it. | |
| * see | |
| * "Media RAM (MERAM)" on r8a7740 documentation | |
| */ | |
| #define MEBUFCNTR 0xFE950098 | |
| static void __init r8a7740_meram_workaround(void) | |
| { | |
| void __iomem *reg; | |
| reg = ioremap(MEBUFCNTR, 4); | |
| if (reg) { | |
| iowrite32(0x01600164, reg); | |
| iounmap(reg); | |
| } | |
| } | |
| static void __init r8a7740_init_irq_of(void) | |
| { | |
| void __iomem *intc_prio_base = ioremap(0xe6900010, 0x10); | |
| void __iomem *intc_msk_base = ioremap(0xe6900040, 0x10); | |
| void __iomem *pfc_inta_ctrl = ioremap(0xe605807c, 0x4); | |
| irqchip_init(); | |
| /* route signals to GIC */ | |
| iowrite32(0x0, pfc_inta_ctrl); | |
| /* | |
| * To mask the shared interrupt to SPI 149 we must ensure to set | |
| * PRIO *and* MASK. Else we run into IRQ floods when registering | |
| * the intc_irqpin devices | |
| */ | |
| iowrite32(0x0, intc_prio_base + 0x0); | |
| iowrite32(0x0, intc_prio_base + 0x4); | |
| iowrite32(0x0, intc_prio_base + 0x8); | |
| iowrite32(0x0, intc_prio_base + 0xc); | |
| iowrite8(0xff, intc_msk_base + 0x0); | |
| iowrite8(0xff, intc_msk_base + 0x4); | |
| iowrite8(0xff, intc_msk_base + 0x8); | |
| iowrite8(0xff, intc_msk_base + 0xc); | |
| iounmap(intc_prio_base); | |
| iounmap(intc_msk_base); | |
| iounmap(pfc_inta_ctrl); | |
| } | |
| static void __init r8a7740_generic_init(void) | |
| { | |
| r8a7740_meram_workaround(); | |
| } | |
| static const char *const r8a7740_boards_compat_dt[] __initconst = { | |
| "renesas,r8a7740", | |
| NULL, | |
| }; | |
| DT_MACHINE_START(R8A7740_DT, "Generic R8A7740 (Flattened Device Tree)") | |
| .l2c_aux_val = 0, | |
| .l2c_aux_mask = ~0, | |
| .init_early = shmobile_init_delay, | |
| .init_irq = r8a7740_init_irq_of, | |
| .init_machine = r8a7740_generic_init, | |
| .init_late = shmobile_init_late, | |
| .dt_compat = r8a7740_boards_compat_dt, | |
| MACHINE_END |