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[hh.org.git] / arch / sh / drivers / superhyway / ops-sh4-202.c
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1 /*
2 * arch/sh/drivers/superhyway/ops-sh4-202.c
4 * SuperHyway bus support for SH4-202
6 * Copyright (C) 2005 Paul Mundt
8 * This file is subject to the terms and conditions of the GNU
9 * General Public License. See the file "COPYING" in the main
10 * directory of this archive for more details.
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/superhyway.h>
15 #include <linux/string.h>
16 #include <asm/addrspace.h>
17 #include <asm/io.h>
19 #define PHYS_EMI_CBLOCK P4SEGADDR(0x1ec00000)
20 #define PHYS_EMI_DBLOCK P4SEGADDR(0x08000000)
21 #define PHYS_FEMI_CBLOCK P4SEGADDR(0x1f800000)
22 #define PHYS_FEMI_DBLOCK P4SEGADDR(0x00000000)
24 #define PHYS_EPBR_BLOCK P4SEGADDR(0x1de00000)
25 #define PHYS_DMAC_BLOCK P4SEGADDR(0x1fa00000)
26 #define PHYS_PBR_BLOCK P4SEGADDR(0x1fc00000)
28 static struct resource emi_resources[] = {
29 [0] = {
30 .start = PHYS_EMI_CBLOCK,
31 .end = PHYS_EMI_CBLOCK + 0x00300000 - 1,
32 .flags = IORESOURCE_MEM,
34 [1] = {
35 .start = PHYS_EMI_DBLOCK,
36 .end = PHYS_EMI_DBLOCK + 0x08000000 - 1,
37 .flags = IORESOURCE_MEM,
41 static struct superhyway_device emi_device = {
42 .name = "emi",
43 .num_resources = ARRAY_SIZE(emi_resources),
44 .resource = emi_resources,
47 static struct resource femi_resources[] = {
48 [0] = {
49 .start = PHYS_FEMI_CBLOCK,
50 .end = PHYS_FEMI_CBLOCK + 0x00100000 - 1,
51 .flags = IORESOURCE_MEM,
53 [1] = {
54 .start = PHYS_FEMI_DBLOCK,
55 .end = PHYS_FEMI_DBLOCK + 0x08000000 - 1,
56 .flags = IORESOURCE_MEM,
60 static struct superhyway_device femi_device = {
61 .name = "femi",
62 .num_resources = ARRAY_SIZE(femi_resources),
63 .resource = femi_resources,
66 static struct resource epbr_resources[] = {
67 [0] = {
68 .start = P4SEGADDR(0x1e7ffff8),
69 .end = P4SEGADDR(0x1e7ffff8 + (sizeof(u32) * 2) - 1),
70 .flags = IORESOURCE_MEM,
72 [1] = {
73 .start = PHYS_EPBR_BLOCK,
74 .end = PHYS_EPBR_BLOCK + 0x00a00000 - 1,
75 .flags = IORESOURCE_MEM,
79 static struct superhyway_device epbr_device = {
80 .name = "epbr",
81 .num_resources = ARRAY_SIZE(epbr_resources),
82 .resource = epbr_resources,
85 static struct resource dmac_resource = {
86 .start = PHYS_DMAC_BLOCK,
87 .end = PHYS_DMAC_BLOCK + 0x00100000 - 1,
88 .flags = IORESOURCE_MEM,
91 static struct superhyway_device dmac_device = {
92 .name = "dmac",
93 .num_resources = 1,
94 .resource = &dmac_resource,
97 static struct resource pbr_resources[] = {
98 [0] = {
99 .start = P4SEGADDR(0x1ffffff8),
100 .end = P4SEGADDR(0x1ffffff8 + (sizeof(u32) * 2) - 1),
101 .flags = IORESOURCE_MEM,
103 [1] = {
104 .start = PHYS_PBR_BLOCK,
105 .end = PHYS_PBR_BLOCK + 0x00400000 - (sizeof(u32) * 2) - 1,
106 .flags = IORESOURCE_MEM,
110 static struct superhyway_device pbr_device = {
111 .name = "pbr",
112 .num_resources = ARRAY_SIZE(pbr_resources),
113 .resource = pbr_resources,
116 static struct superhyway_device *sh4202_devices[] __initdata = {
117 &emi_device, &femi_device, &epbr_device, &dmac_device, &pbr_device,
120 static int sh4202_read_vcr(unsigned long base, struct superhyway_vcr_info *vcr)
122 u32 vcrh, vcrl;
123 u64 tmp;
126 * XXX: Even though the SH4-202 Evaluation Device documentation
127 * indicates that VCRL is mapped first with VCRH at a + 0x04
128 * offset, the opposite seems to be true.
130 * Some modules (PBR and ePBR for instance) also appear to have
131 * VCRL/VCRH flipped in the documentation, but on the SH4-202
132 * itself it appears that these are all consistently mapped with
133 * VCRH preceeding VCRL.
135 * Do not trust the documentation, for it is evil.
137 vcrh = ctrl_inl(base);
138 vcrl = ctrl_inl(base + sizeof(u32));
140 tmp = ((u64)vcrh << 32) | vcrl;
141 memcpy(vcr, &tmp, sizeof(u64));
143 return 0;
146 static int sh4202_write_vcr(unsigned long base, struct superhyway_vcr_info vcr)
148 u64 tmp = *(u64 *)&vcr;
150 ctrl_outl((tmp >> 32) & 0xffffffff, base);
151 ctrl_outl(tmp & 0xffffffff, base + sizeof(u32));
153 return 0;
156 static struct superhyway_ops sh4202_superhyway_ops = {
157 .read_vcr = sh4202_read_vcr,
158 .write_vcr = sh4202_write_vcr,
161 struct superhyway_bus superhyway_channels[] = {
162 { &sh4202_superhyway_ops, },
163 { 0, },
166 int __init superhyway_scan_bus(struct superhyway_bus *bus)
168 return superhyway_add_devices(bus, sh4202_devices,
169 ARRAY_SIZE(sh4202_devices));