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168 lines
4.0 KiB
168 lines
4.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* arch/sh/drivers/superhyway/ops-sh4-202.c |
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* |
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* SuperHyway bus support for SH4-202 |
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* |
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* Copyright (C) 2005 Paul Mundt |
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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/superhyway.h> |
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#include <linux/string.h> |
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#include <asm/addrspace.h> |
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#include <asm/io.h> |
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#define PHYS_EMI_CBLOCK P4SEGADDR(0x1ec00000) |
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#define PHYS_EMI_DBLOCK P4SEGADDR(0x08000000) |
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#define PHYS_FEMI_CBLOCK P4SEGADDR(0x1f800000) |
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#define PHYS_FEMI_DBLOCK P4SEGADDR(0x00000000) |
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#define PHYS_EPBR_BLOCK P4SEGADDR(0x1de00000) |
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#define PHYS_DMAC_BLOCK P4SEGADDR(0x1fa00000) |
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#define PHYS_PBR_BLOCK P4SEGADDR(0x1fc00000) |
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static struct resource emi_resources[] = { |
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[0] = { |
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.start = PHYS_EMI_CBLOCK, |
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.end = PHYS_EMI_CBLOCK + 0x00300000 - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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[1] = { |
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.start = PHYS_EMI_DBLOCK, |
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.end = PHYS_EMI_DBLOCK + 0x08000000 - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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}; |
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static struct superhyway_device emi_device = { |
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.name = "emi", |
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.num_resources = ARRAY_SIZE(emi_resources), |
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.resource = emi_resources, |
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}; |
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static struct resource femi_resources[] = { |
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[0] = { |
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.start = PHYS_FEMI_CBLOCK, |
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.end = PHYS_FEMI_CBLOCK + 0x00100000 - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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[1] = { |
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.start = PHYS_FEMI_DBLOCK, |
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.end = PHYS_FEMI_DBLOCK + 0x08000000 - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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}; |
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static struct superhyway_device femi_device = { |
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.name = "femi", |
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.num_resources = ARRAY_SIZE(femi_resources), |
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.resource = femi_resources, |
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}; |
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static struct resource epbr_resources[] = { |
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[0] = { |
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.start = P4SEGADDR(0x1e7ffff8), |
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.end = P4SEGADDR(0x1e7ffff8 + (sizeof(u32) * 2) - 1), |
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.flags = IORESOURCE_MEM, |
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}, |
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[1] = { |
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.start = PHYS_EPBR_BLOCK, |
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.end = PHYS_EPBR_BLOCK + 0x00a00000 - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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}; |
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static struct superhyway_device epbr_device = { |
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.name = "epbr", |
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.num_resources = ARRAY_SIZE(epbr_resources), |
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.resource = epbr_resources, |
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}; |
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static struct resource dmac_resource = { |
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.start = PHYS_DMAC_BLOCK, |
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.end = PHYS_DMAC_BLOCK + 0x00100000 - 1, |
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.flags = IORESOURCE_MEM, |
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}; |
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static struct superhyway_device dmac_device = { |
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.name = "dmac", |
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.num_resources = 1, |
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.resource = &dmac_resource, |
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}; |
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static struct resource pbr_resources[] = { |
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[0] = { |
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.start = P4SEGADDR(0x1ffffff8), |
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.end = P4SEGADDR(0x1ffffff8 + (sizeof(u32) * 2) - 1), |
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.flags = IORESOURCE_MEM, |
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}, |
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[1] = { |
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.start = PHYS_PBR_BLOCK, |
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.end = PHYS_PBR_BLOCK + 0x00400000 - (sizeof(u32) * 2) - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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}; |
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static struct superhyway_device pbr_device = { |
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.name = "pbr", |
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.num_resources = ARRAY_SIZE(pbr_resources), |
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.resource = pbr_resources, |
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}; |
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static struct superhyway_device *sh4202_devices[] __initdata = { |
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&emi_device, &femi_device, &epbr_device, &dmac_device, &pbr_device, |
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}; |
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static int sh4202_read_vcr(unsigned long base, struct superhyway_vcr_info *vcr) |
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{ |
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u32 vcrh, vcrl; |
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u64 tmp; |
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/* |
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* XXX: Even though the SH4-202 Evaluation Device documentation |
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* indicates that VCRL is mapped first with VCRH at a + 0x04 |
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* offset, the opposite seems to be true. |
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* |
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* Some modules (PBR and ePBR for instance) also appear to have |
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* VCRL/VCRH flipped in the documentation, but on the SH4-202 |
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* itself it appears that these are all consistently mapped with |
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* VCRH preceding VCRL. |
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* |
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* Do not trust the documentation, for it is evil. |
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*/ |
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vcrh = __raw_readl(base); |
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vcrl = __raw_readl(base + sizeof(u32)); |
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tmp = ((u64)vcrh << 32) | vcrl; |
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memcpy(vcr, &tmp, sizeof(u64)); |
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return 0; |
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} |
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static int sh4202_write_vcr(unsigned long base, struct superhyway_vcr_info vcr) |
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{ |
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u64 tmp = *(u64 *)&vcr; |
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__raw_writel((tmp >> 32) & 0xffffffff, base); |
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__raw_writel(tmp & 0xffffffff, base + sizeof(u32)); |
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return 0; |
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} |
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static struct superhyway_ops sh4202_superhyway_ops = { |
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.read_vcr = sh4202_read_vcr, |
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.write_vcr = sh4202_write_vcr, |
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}; |
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struct superhyway_bus superhyway_channels[] = { |
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{ &sh4202_superhyway_ops, }, |
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{ 0, }, |
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}; |
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int __init superhyway_scan_bus(struct superhyway_bus *bus) |
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{ |
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return superhyway_add_devices(bus, sh4202_devices, |
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ARRAY_SIZE(sh4202_devices)); |
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} |
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