aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/mpc83xx/patches-2.6.33/010-sysdev_rb_iomap.patch
blob: 43c44bad2dabc6b6c2e11d0f8dcd61f63b597d03 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
--- /dev/null
+++ b/arch/powerpc/sysdev/rb_iomap.c
@@ -0,0 +1,223 @@
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/mm.h>
+#include <asm/io.h>
+
+#define LOCALBUS_START		0x40000000
+#define LOCALBUS_MASK		0x007fffff
+#define LOCALBUS_REGMASK	0x001fffff
+
+static void __iomem *localbus_base;
+
+static inline int is_localbus(void __iomem *addr)
+{
+	return ((unsigned) addr & ~LOCALBUS_MASK) == LOCALBUS_START;
+}
+
+static inline unsigned localbus_regoff(unsigned reg) {
+	return (reg << 16) | (((reg ^ 8) & 8) << 17);
+}
+
+static inline void __iomem *localbus_addr(void __iomem *addr)
+{
+	return localbus_base
+	    + ((unsigned) addr & LOCALBUS_MASK & ~LOCALBUS_REGMASK)
+	    + localbus_regoff((unsigned) addr & LOCALBUS_REGMASK);
+}
+
+unsigned int ioread8(void __iomem *addr)
+{
+	if (is_localbus(addr))
+		return in_be16(localbus_addr(addr)) >> 8;
+	return readb(addr);
+}
+EXPORT_SYMBOL(ioread8);
+
+unsigned int ioread16(void __iomem *addr)
+{
+	if (is_localbus(addr))
+		return le16_to_cpu(in_be16(localbus_addr(addr)));
+	return readw(addr);
+}
+EXPORT_SYMBOL(ioread16);
+
+unsigned int ioread16be(void __iomem *addr)
+{
+	return in_be16(addr);
+}
+EXPORT_SYMBOL(ioread16be);
+
+unsigned int ioread32(void __iomem *addr)
+{
+	return readl(addr);
+}
+EXPORT_SYMBOL(ioread32);
+
+unsigned int ioread32be(void __iomem *addr)
+{
+	return in_be32(addr);
+}
+EXPORT_SYMBOL(ioread32be);
+
+void iowrite8(u8 val, void __iomem *addr)
+{
+	if (is_localbus(addr))
+		out_be16(localbus_addr(addr), ((u16) val) << 8);
+	else
+		writeb(val, addr);
+}
+EXPORT_SYMBOL(iowrite8);
+
+void iowrite16(u16 val, void __iomem *addr)
+{
+	if (is_localbus(addr))
+		out_be16(localbus_addr(addr), cpu_to_le16(val));
+	else
+		writew(val, addr);
+}
+EXPORT_SYMBOL(iowrite16);
+
+void iowrite16be(u16 val, void __iomem *addr)
+{
+	out_be16(addr, val);
+}
+EXPORT_SYMBOL(iowrite16be);
+
+void iowrite32(u32 val, void __iomem *addr)
+{
+	writel(val, addr);
+}
+EXPORT_SYMBOL(iowrite32);
+
+void iowrite32be(u32 val, void __iomem *addr)
+{
+	out_be32(addr, val);
+}
+EXPORT_SYMBOL(iowrite32be);
+
+void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
+{
+	if (is_localbus(addr)) {
+		unsigned i;
+		void *laddr = localbus_addr(addr);
+		u8 *buf = dst;
+
+		for (i = 0; i < count; ++i) {
+			*buf++ = in_be16(laddr) >> 8;
+		}
+	} else {
+		_insb((u8 __iomem *) addr, dst, count);
+	}
+}
+EXPORT_SYMBOL(ioread8_rep);
+
+void ioread16_rep(void __iomem *addr, void *dst, unsigned long count)
+{
+	if (is_localbus(addr)) {
+		unsigned i;
+		void *laddr = localbus_addr(addr);
+		u16 *buf = dst;
+
+		for (i = 0; i < count; ++i) {
+			*buf++ = in_be16(laddr);
+		}
+	} else {
+		_insw_ns((u16 __iomem *) addr, dst, count);
+	}
+}
+EXPORT_SYMBOL(ioread16_rep);
+
+void ioread32_rep(void __iomem *addr, void *dst, unsigned long count)
+{
+	_insl_ns((u32 __iomem *) addr, dst, count);
+}
+EXPORT_SYMBOL(ioread32_rep);
+
+void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count)
+{
+	if (is_localbus(addr)) {
+		unsigned i;
+		void *laddr = localbus_addr(addr);
+		const u8 *buf = src;
+
+		for (i = 0; i < count; ++i) {
+			out_be16(laddr, ((u16) *buf++) << 8);
+		}
+	} else {
+		_outsb((u8 __iomem *) addr, src, count);
+	}
+}
+EXPORT_SYMBOL(iowrite8_rep);
+
+void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count)
+{
+	if (is_localbus(addr)) {
+		unsigned i;
+		void *laddr = localbus_addr(addr);
+		const u16 *buf = src;
+
+		for (i = 0; i < count; ++i) {
+			out_be16(laddr, *buf++);
+		}
+	} else {
+		_outsw_ns((u16 __iomem *) addr, src, count);
+	}
+}
+EXPORT_SYMBOL(iowrite16_rep);
+
+void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count)
+{
+	_outsl_ns((u32 __iomem *) addr, src, count);
+}
+EXPORT_SYMBOL(iowrite32_rep);
+
+void __iomem *ioport_map(unsigned long port, unsigned int len)
+{
+	return (void __iomem *) (port + _IO_BASE);
+}
+EXPORT_SYMBOL(ioport_unmap);
+
+void ioport_unmap(void __iomem *addr)
+{
+	/* Nothing to do */
+}
+EXPORT_SYMBOL(ioport_map);
+
+void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
+{
+	unsigned long start = pci_resource_start(dev, bar);
+	unsigned long len = pci_resource_len(dev, bar);
+	unsigned long flags = pci_resource_flags(dev, bar);
+
+	if (!len)
+		return NULL;
+	if (max && len > max)
+		len = max;
+	if (flags & IORESOURCE_IO)
+		return ioport_map(start, len);
+	if (flags & IORESOURCE_MEM)
+		return ioremap(start, len);
+	/* What? */
+	return NULL;
+}
+EXPORT_SYMBOL(pci_iomap);
+
+void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
+{
+	/* Nothing to do */
+}
+EXPORT_SYMBOL(pci_iounmap);
+
+void __iomem *localbus_map(unsigned long addr, unsigned int len)
+{
+	if (!localbus_base)
+		localbus_base = ioremap(addr & ~LOCALBUS_MASK,
+					LOCALBUS_MASK + 1);
+	return (void *) (LOCALBUS_START + (addr & LOCALBUS_MASK));
+}
+EXPORT_SYMBOL(localbus_map);
+
+void localbus_unmap(void __iomem *addr)
+{
+}
+EXPORT_SYMBOL(localbus_unmap);