18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * R8A7740 processor support 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * Copyright (C) 2011 Renesas Solutions Corp. 68c2ecf20Sopenharmony_ci * Copyright (C) 2011 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 78c2ecf20Sopenharmony_ci */ 88c2ecf20Sopenharmony_ci#include <linux/kernel.h> 98c2ecf20Sopenharmony_ci#include <linux/init.h> 108c2ecf20Sopenharmony_ci#include <linux/io.h> 118c2ecf20Sopenharmony_ci#include <linux/irqchip.h> 128c2ecf20Sopenharmony_ci#include <linux/irqchip/arm-gic.h> 138c2ecf20Sopenharmony_ci 148c2ecf20Sopenharmony_ci#include <asm/mach/map.h> 158c2ecf20Sopenharmony_ci#include <asm/mach/arch.h> 168c2ecf20Sopenharmony_ci#include <asm/mach/time.h> 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci#include "common.h" 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ci/* 218c2ecf20Sopenharmony_ci * r8a7740 chip has lasting errata on MERAM buffer. 228c2ecf20Sopenharmony_ci * this is work-around for it. 238c2ecf20Sopenharmony_ci * see 248c2ecf20Sopenharmony_ci * "Media RAM (MERAM)" on r8a7740 documentation 258c2ecf20Sopenharmony_ci */ 268c2ecf20Sopenharmony_ci#define MEBUFCNTR 0xFE950098 278c2ecf20Sopenharmony_cistatic void __init r8a7740_meram_workaround(void) 288c2ecf20Sopenharmony_ci{ 298c2ecf20Sopenharmony_ci void __iomem *reg; 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci reg = ioremap(MEBUFCNTR, 4); 328c2ecf20Sopenharmony_ci if (reg) { 338c2ecf20Sopenharmony_ci iowrite32(0x01600164, reg); 348c2ecf20Sopenharmony_ci iounmap(reg); 358c2ecf20Sopenharmony_ci } 368c2ecf20Sopenharmony_ci} 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_cistatic void __init r8a7740_init_irq_of(void) 398c2ecf20Sopenharmony_ci{ 408c2ecf20Sopenharmony_ci void __iomem *intc_prio_base = ioremap(0xe6900010, 0x10); 418c2ecf20Sopenharmony_ci void __iomem *intc_msk_base = ioremap(0xe6900040, 0x10); 428c2ecf20Sopenharmony_ci void __iomem *pfc_inta_ctrl = ioremap(0xe605807c, 0x4); 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ci irqchip_init(); 458c2ecf20Sopenharmony_ci 468c2ecf20Sopenharmony_ci /* route signals to GIC */ 478c2ecf20Sopenharmony_ci iowrite32(0x0, pfc_inta_ctrl); 488c2ecf20Sopenharmony_ci 498c2ecf20Sopenharmony_ci /* 508c2ecf20Sopenharmony_ci * To mask the shared interrupt to SPI 149 we must ensure to set 518c2ecf20Sopenharmony_ci * PRIO *and* MASK. Else we run into IRQ floods when registering 528c2ecf20Sopenharmony_ci * the intc_irqpin devices 538c2ecf20Sopenharmony_ci */ 548c2ecf20Sopenharmony_ci iowrite32(0x0, intc_prio_base + 0x0); 558c2ecf20Sopenharmony_ci iowrite32(0x0, intc_prio_base + 0x4); 568c2ecf20Sopenharmony_ci iowrite32(0x0, intc_prio_base + 0x8); 578c2ecf20Sopenharmony_ci iowrite32(0x0, intc_prio_base + 0xc); 588c2ecf20Sopenharmony_ci iowrite8(0xff, intc_msk_base + 0x0); 598c2ecf20Sopenharmony_ci iowrite8(0xff, intc_msk_base + 0x4); 608c2ecf20Sopenharmony_ci iowrite8(0xff, intc_msk_base + 0x8); 618c2ecf20Sopenharmony_ci iowrite8(0xff, intc_msk_base + 0xc); 628c2ecf20Sopenharmony_ci 638c2ecf20Sopenharmony_ci iounmap(intc_prio_base); 648c2ecf20Sopenharmony_ci iounmap(intc_msk_base); 658c2ecf20Sopenharmony_ci iounmap(pfc_inta_ctrl); 668c2ecf20Sopenharmony_ci} 678c2ecf20Sopenharmony_ci 688c2ecf20Sopenharmony_cistatic void __init r8a7740_generic_init(void) 698c2ecf20Sopenharmony_ci{ 708c2ecf20Sopenharmony_ci r8a7740_meram_workaround(); 718c2ecf20Sopenharmony_ci} 728c2ecf20Sopenharmony_ci 738c2ecf20Sopenharmony_cistatic const char *const r8a7740_boards_compat_dt[] __initconst = { 748c2ecf20Sopenharmony_ci "renesas,r8a7740", 758c2ecf20Sopenharmony_ci NULL, 768c2ecf20Sopenharmony_ci}; 778c2ecf20Sopenharmony_ci 788c2ecf20Sopenharmony_ciDT_MACHINE_START(R8A7740_DT, "Generic R8A7740 (Flattened Device Tree)") 798c2ecf20Sopenharmony_ci .l2c_aux_val = 0, 808c2ecf20Sopenharmony_ci .l2c_aux_mask = ~0, 818c2ecf20Sopenharmony_ci .init_early = shmobile_init_delay, 828c2ecf20Sopenharmony_ci .init_irq = r8a7740_init_irq_of, 838c2ecf20Sopenharmony_ci .init_machine = r8a7740_generic_init, 848c2ecf20Sopenharmony_ci .init_late = shmobile_init_late, 858c2ecf20Sopenharmony_ci .dt_compat = r8a7740_boards_compat_dt, 868c2ecf20Sopenharmony_ciMACHINE_END 87