sh: Remove superhyway bus support
The superhyway bus driver was only referenced on SH4-202, which is now gone, so remove it all as well. I could find no trace of anything ever calling superhyway_register_driver(), not in the git history but also not on the web, so I assume this has never served any purpose on mainline kernels. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230914155523.3839811-3-arnd@kernel.org Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
This commit is contained in:
Arnd Bergmann
John Paul Adrian Glaubitz
parent
6c329558c1
commit
8daaed7638
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@ -43,12 +43,6 @@ mach-x3proto
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Busses
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======
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SuperHyway
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----------
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.. kernel-doc:: drivers/sh/superhyway/superhyway.c
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:export:
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Maple
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-----
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@ -737,10 +737,6 @@ endmenu
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menu "Bus options"
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config SUPERHYWAY
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tristate "SuperHyway Bus support"
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depends on CPU_SUBTYPE_SH4_202
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config MAPLE
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bool "Maple Bus support"
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depends on SH_DREAMCAST
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@ -6,6 +6,5 @@
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obj-y += dma/ platform_early.o
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obj-$(CONFIG_PCI) += pci/
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obj-$(CONFIG_SUPERHYWAY) += superhyway/
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obj-$(CONFIG_PUSH_SWITCH) += push-switch.o
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obj-$(CONFIG_HEARTBEAT) += heartbeat.o
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@ -1,7 +0,0 @@
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# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the SuperHyway specific kernel interface routines under Linux.
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#
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obj-$(CONFIG_CPU_SUBTYPE_SH4_202) += ops-sh4-202.o
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@ -1,168 +0,0 @@
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// 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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@ -7,6 +7,5 @@ ifneq ($(CONFIG_COMMON_CLK),y)
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obj-$(CONFIG_HAVE_CLK) += clk/
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endif
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obj-$(CONFIG_MAPLE) += maple/
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obj-$(CONFIG_SUPERHYWAY) += superhyway/
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obj-y += pm_runtime.o
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@ -1,8 +0,0 @@
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# SPDX-License-Identifier: GPL-2.0-only
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#
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# Makefile for the SuperHyway bus drivers.
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#
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obj-$(CONFIG_SUPERHYWAY) += superhyway.o
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obj-$(CONFIG_SYSFS) += superhyway-sysfs.o
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@ -1,54 +0,0 @@
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/*
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* drivers/sh/superhyway/superhyway-sysfs.c
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*
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* SuperHyway Bus sysfs interface
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*
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* Copyright (C) 2004, 2005 Paul Mundt <lethal@linux-sh.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/types.h>
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#include <linux/superhyway.h>
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#define superhyway_ro_attr(name, fmt, field) \
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static ssize_t name##_show(struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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struct superhyway_device *s = to_superhyway_device(dev); \
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return sprintf(buf, fmt, s->field); \
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} \
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static DEVICE_ATTR_RO(name);
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/* VCR flags */
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superhyway_ro_attr(perr_flags, "0x%02x\n", vcr.perr_flags);
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superhyway_ro_attr(merr_flags, "0x%02x\n", vcr.merr_flags);
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superhyway_ro_attr(mod_vers, "0x%04x\n", vcr.mod_vers);
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superhyway_ro_attr(mod_id, "0x%04x\n", vcr.mod_id);
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superhyway_ro_attr(bot_mb, "0x%02x\n", vcr.bot_mb);
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superhyway_ro_attr(top_mb, "0x%02x\n", vcr.top_mb);
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/* Misc */
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superhyway_ro_attr(resource, "0x%08lx\n", resource[0].start);
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static struct attribute *superhyway_dev_attrs[] = {
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&dev_attr_perr_flags.attr,
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&dev_attr_merr_flags.attr,
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&dev_attr_mod_vers.attr,
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&dev_attr_mod_id.attr,
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&dev_attr_bot_mb.attr,
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&dev_attr_top_mb.attr,
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&dev_attr_resource.attr,
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NULL,
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};
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static const struct attribute_group superhyway_dev_group = {
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.attrs = superhyway_dev_attrs,
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};
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const struct attribute_group *superhyway_dev_groups[] = {
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&superhyway_dev_group,
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NULL,
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};
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@ -1,234 +0,0 @@
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/*
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* drivers/sh/superhyway/superhyway.c
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*
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* SuperHyway Bus Driver
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*
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* Copyright (C) 2004, 2005 Paul Mundt <lethal@linux-sh.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/superhyway.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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static int superhyway_devices;
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static struct device superhyway_bus_device = {
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.init_name = "superhyway",
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};
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static void superhyway_device_release(struct device *dev)
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{
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struct superhyway_device *sdev = to_superhyway_device(dev);
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kfree(sdev->resource);
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kfree(sdev);
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}
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/**
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* superhyway_add_device - Add a SuperHyway module
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* @base: Physical address where module is mapped.
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* @sdev: SuperHyway device to add, or NULL to allocate a new one.
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* @bus: Bus where SuperHyway module resides.
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*
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* This is responsible for adding a new SuperHyway module. This sets up a new
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* struct superhyway_device for the module being added if @sdev == NULL.
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*
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* Devices are initially added in the order that they are scanned (from the
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* top-down of the memory map), and are assigned an ID based on the order that
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* they are added. Any manual addition of a module will thus get the ID after
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* the devices already discovered regardless of where it resides in memory.
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*
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* Further work can and should be done in superhyway_scan_bus(), to be sure
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* that any new modules are properly discovered and subsequently registered.
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*/
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int superhyway_add_device(unsigned long base, struct superhyway_device *sdev,
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struct superhyway_bus *bus)
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{
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struct superhyway_device *dev = sdev;
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if (!dev) {
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dev = kzalloc(sizeof(struct superhyway_device), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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}
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dev->bus = bus;
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superhyway_read_vcr(dev, base, &dev->vcr);
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if (!dev->resource) {
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dev->resource = kzalloc(sizeof(struct resource), GFP_KERNEL);
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if (!dev->resource) {
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kfree(dev);
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return -ENOMEM;
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}
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dev->resource->name = dev->name;
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dev->resource->start = base;
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dev->resource->end = dev->resource->start + 0x01000000;
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}
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dev->dev.parent = &superhyway_bus_device;
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dev->dev.bus = &superhyway_bus_type;
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dev->dev.release = superhyway_device_release;
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dev->id.id = dev->vcr.mod_id;
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sprintf(dev->name, "SuperHyway device %04x", dev->id.id);
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dev_set_name(&dev->dev, "%02x", superhyway_devices);
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superhyway_devices++;
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return device_register(&dev->dev);
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}
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int superhyway_add_devices(struct superhyway_bus *bus,
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struct superhyway_device **devices,
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int nr_devices)
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{
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int i, ret = 0;
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for (i = 0; i < nr_devices; i++) {
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struct superhyway_device *dev = devices[i];
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ret |= superhyway_add_device(dev->resource[0].start, dev, bus);
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}
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return ret;
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}
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static int __init superhyway_init(void)
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{
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struct superhyway_bus *bus;
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int ret;
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ret = device_register(&superhyway_bus_device);
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if (unlikely(ret))
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return ret;
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for (bus = superhyway_channels; bus->ops; bus++)
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ret |= superhyway_scan_bus(bus);
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return ret;
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}
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postcore_initcall(superhyway_init);
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static const struct superhyway_device_id *
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superhyway_match_id(const struct superhyway_device_id *ids,
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struct superhyway_device *dev)
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{
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while (ids->id) {
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if (ids->id == dev->id.id)
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return ids;
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ids++;
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}
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return NULL;
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}
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static int superhyway_device_probe(struct device *dev)
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{
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struct superhyway_device *shyway_dev = to_superhyway_device(dev);
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struct superhyway_driver *shyway_drv = to_superhyway_driver(dev->driver);
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if (shyway_drv && shyway_drv->probe) {
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const struct superhyway_device_id *id;
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id = superhyway_match_id(shyway_drv->id_table, shyway_dev);
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if (id)
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return shyway_drv->probe(shyway_dev, id);
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}
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return -ENODEV;
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}
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static void superhyway_device_remove(struct device *dev)
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{
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struct superhyway_device *shyway_dev = to_superhyway_device(dev);
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struct superhyway_driver *shyway_drv = to_superhyway_driver(dev->driver);
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if (shyway_drv->remove)
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shyway_drv->remove(shyway_dev);
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}
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/**
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* superhyway_register_driver - Register a new SuperHyway driver
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* @drv: SuperHyway driver to register.
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*
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* This registers the passed in @drv. Any devices matching the id table will
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* automatically be populated and handed off to the driver's specified probe
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* routine.
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*/
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int superhyway_register_driver(struct superhyway_driver *drv)
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{
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drv->drv.name = drv->name;
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drv->drv.bus = &superhyway_bus_type;
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return driver_register(&drv->drv);
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}
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/**
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* superhyway_unregister_driver - Unregister a SuperHyway driver
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* @drv: SuperHyway driver to unregister.
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*
|
||||
* This cleans up after superhyway_register_driver(), and should be invoked in
|
||||
* the exit path of any module drivers.
|
||||
*/
|
||||
void superhyway_unregister_driver(struct superhyway_driver *drv)
|
||||
{
|
||||
driver_unregister(&drv->drv);
|
||||
}
|
||||
|
||||
static int superhyway_bus_match(struct device *dev, struct device_driver *drv)
|
||||
{
|
||||
struct superhyway_device *shyway_dev = to_superhyway_device(dev);
|
||||
struct superhyway_driver *shyway_drv = to_superhyway_driver(drv);
|
||||
const struct superhyway_device_id *ids = shyway_drv->id_table;
|
||||
|
||||
if (!ids)
|
||||
return -EINVAL;
|
||||
if (superhyway_match_id(ids, shyway_dev))
|
||||
return 1;
|
||||
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
struct bus_type superhyway_bus_type = {
|
||||
.name = "superhyway",
|
||||
.match = superhyway_bus_match,
|
||||
#ifdef CONFIG_SYSFS
|
||||
.dev_groups = superhyway_dev_groups,
|
||||
#endif
|
||||
.probe = superhyway_device_probe,
|
||||
.remove = superhyway_device_remove,
|
||||
};
|
||||
|
||||
static int __init superhyway_bus_init(void)
|
||||
{
|
||||
return bus_register(&superhyway_bus_type);
|
||||
}
|
||||
|
||||
static void __exit superhyway_bus_exit(void)
|
||||
{
|
||||
device_unregister(&superhyway_bus_device);
|
||||
bus_unregister(&superhyway_bus_type);
|
||||
}
|
||||
|
||||
core_initcall(superhyway_bus_init);
|
||||
module_exit(superhyway_bus_exit);
|
||||
|
||||
EXPORT_SYMBOL(superhyway_bus_type);
|
||||
EXPORT_SYMBOL(superhyway_add_device);
|
||||
EXPORT_SYMBOL(superhyway_add_devices);
|
||||
EXPORT_SYMBOL(superhyway_register_driver);
|
||||
EXPORT_SYMBOL(superhyway_unregister_driver);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -1,107 +0,0 @@
|
|||
/*
|
||||
* include/linux/superhyway.h
|
||||
*
|
||||
* SuperHyway Bus definitions
|
||||
*
|
||||
* Copyright (C) 2004, 2005 Paul Mundt <lethal@linux-sh.org>
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file "COPYING" in the main directory of this archive
|
||||
* for more details.
|
||||
*/
|
||||
#ifndef __LINUX_SUPERHYWAY_H
|
||||
#define __LINUX_SUPERHYWAY_H
|
||||
|
||||
#include <linux/device.h>
|
||||
|
||||
/*
|
||||
* SuperHyway IDs
|
||||
*/
|
||||
#define SUPERHYWAY_DEVICE_ID_SH5_DMAC 0x0183
|
||||
|
||||
struct superhyway_vcr_info {
|
||||
u8 perr_flags; /* P-port Error flags */
|
||||
u8 merr_flags; /* Module Error flags */
|
||||
u16 mod_vers; /* Module Version */
|
||||
u16 mod_id; /* Module ID */
|
||||
u8 bot_mb; /* Bottom Memory block */
|
||||
u8 top_mb; /* Top Memory block */
|
||||
};
|
||||
|
||||
struct superhyway_ops {
|
||||
int (*read_vcr)(unsigned long base, struct superhyway_vcr_info *vcr);
|
||||
int (*write_vcr)(unsigned long base, struct superhyway_vcr_info vcr);
|
||||
};
|
||||
|
||||
struct superhyway_bus {
|
||||
struct superhyway_ops *ops;
|
||||
};
|
||||
|
||||
extern struct superhyway_bus superhyway_channels[];
|
||||
|
||||
struct superhyway_device_id {
|
||||
unsigned int id;
|
||||
unsigned long driver_data;
|
||||
};
|
||||
|
||||
struct superhyway_device;
|
||||
extern struct bus_type superhyway_bus_type;
|
||||
|
||||
struct superhyway_driver {
|
||||
char *name;
|
||||
|
||||
const struct superhyway_device_id *id_table;
|
||||
struct device_driver drv;
|
||||
|
||||
int (*probe)(struct superhyway_device *dev, const struct superhyway_device_id *id);
|
||||
void (*remove)(struct superhyway_device *dev);
|
||||
};
|
||||
|
||||
#define to_superhyway_driver(d) container_of((d), struct superhyway_driver, drv)
|
||||
|
||||
struct superhyway_device {
|
||||
char name[32];
|
||||
|
||||
struct device dev;
|
||||
|
||||
struct superhyway_device_id id;
|
||||
struct superhyway_driver *drv;
|
||||
struct superhyway_bus *bus;
|
||||
|
||||
int num_resources;
|
||||
struct resource *resource;
|
||||
struct superhyway_vcr_info vcr;
|
||||
};
|
||||
|
||||
#define to_superhyway_device(d) container_of((d), struct superhyway_device, dev)
|
||||
|
||||
#define superhyway_get_drvdata(d) dev_get_drvdata(&(d)->dev)
|
||||
#define superhyway_set_drvdata(d,p) dev_set_drvdata(&(d)->dev, (p))
|
||||
|
||||
static inline int
|
||||
superhyway_read_vcr(struct superhyway_device *dev, unsigned long base,
|
||||
struct superhyway_vcr_info *vcr)
|
||||
{
|
||||
return dev->bus->ops->read_vcr(base, vcr);
|
||||
}
|
||||
|
||||
static inline int
|
||||
superhyway_write_vcr(struct superhyway_device *dev, unsigned long base,
|
||||
struct superhyway_vcr_info vcr)
|
||||
{
|
||||
return dev->bus->ops->write_vcr(base, vcr);
|
||||
}
|
||||
|
||||
extern int superhyway_scan_bus(struct superhyway_bus *);
|
||||
|
||||
/* drivers/sh/superhyway/superhyway.c */
|
||||
int superhyway_register_driver(struct superhyway_driver *);
|
||||
void superhyway_unregister_driver(struct superhyway_driver *);
|
||||
int superhyway_add_device(unsigned long base, struct superhyway_device *, struct superhyway_bus *);
|
||||
int superhyway_add_devices(struct superhyway_bus *bus, struct superhyway_device **devices, int nr_devices);
|
||||
|
||||
/* drivers/sh/superhyway/superhyway-sysfs.c */
|
||||
extern const struct attribute_group *superhyway_dev_groups[];
|
||||
|
||||
#endif /* __LINUX_SUPERHYWAY_H */
|
||||
|
||||
Loading…
Reference in New Issue