| // 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_nocache(MEBUFCNTR, 4); |
| if (reg) { |
| iowrite32(0x01600164, reg); |
| iounmap(reg); |
| } |
| } |
| |
| static void __init r8a7740_init_irq_of(void) |
| { |
| void __iomem *intc_prio_base = ioremap_nocache(0xe6900010, 0x10); |
| void __iomem *intc_msk_base = ioremap_nocache(0xe6900040, 0x10); |
| void __iomem *pfc_inta_ctrl = ioremap_nocache(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 |