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