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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
|
/* sbus.c: SBus support routines.
*
* Copyright (C) 1995, 2006 David S. Miller (davem@davemloft.net)
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/of_device.h>
#include <asm/system.h>
#include <asm/sbus.h>
#include <asm/dma.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/irq.h>
static ssize_t
show_sbusobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
{
struct sbus_dev *sbus;
sbus = to_sbus_device(dev);
return snprintf (buf, PAGE_SIZE, "%s\n", sbus->ofdev.node->full_name);
}
static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_sbusobppath_attr, NULL);
struct sbus_bus *sbus_root;
static void __init fill_sbus_device(struct device_node *dp, struct sbus_dev *sdev)
{
struct dev_archdata *sd;
unsigned long base;
const void *pval;
int len, err;
sdev->prom_node = dp->node;
strcpy(sdev->prom_name, dp->name);
pval = of_get_property(dp, "reg", &len);
sdev->num_registers = 0;
if (pval) {
memcpy(sdev->reg_addrs, pval, len);
sdev->num_registers =
len / sizeof(struct linux_prom_registers);
base = (unsigned long) sdev->reg_addrs[0].phys_addr;
/* Compute the slot number. */
if (base >= SUN_SBUS_BVADDR && sparc_cpu_model == sun4m)
sdev->slot = sbus_dev_slot(base);
else
sdev->slot = sdev->reg_addrs[0].which_io;
}
pval = of_get_property(dp, "ranges", &len);
sdev->num_device_ranges = 0;
if (pval) {
memcpy(sdev->device_ranges, pval, len);
sdev->num_device_ranges =
len / sizeof(struct linux_prom_ranges);
}
sbus_fill_device_irq(sdev);
sd = &sdev->ofdev.dev.archdata;
sd->prom_node = dp;
sd->op = &sdev->ofdev;
sdev->ofdev.node = dp;
if (sdev->parent)
sdev->ofdev.dev.parent = &sdev->parent->ofdev.dev;
else
sdev->ofdev.dev.parent = &sdev->bus->ofdev.dev;
sdev->ofdev.dev.bus = &sbus_bus_type;
dev_set_name(&sdev->ofdev.dev, "sbus[%08x]", dp->node);
if (of_device_register(&sdev->ofdev) != 0)
printk(KERN_DEBUG "sbus: device registration error for %s!\n",
dp->path_component_name);
/* WE HAVE BEEN INVADED BY ALIENS! */
err = sysfs_create_file(&sdev->ofdev.dev.kobj, &dev_attr_obppath.attr);
}
static void __init sbus_bus_ranges_init(struct device_node *dp, struct sbus_bus *sbus)
{
const void *pval;
int len;
pval = of_get_property(dp, "ranges", &len);
sbus->num_sbus_ranges = 0;
if (pval) {
memcpy(sbus->sbus_ranges, pval, len);
sbus->num_sbus_ranges =
len / sizeof(struct linux_prom_ranges);
sbus_arch_bus_ranges_init(dp->parent, sbus);
}
}
static void __init __apply_ranges_to_regs(struct linux_prom_ranges *ranges,
int num_ranges,
struct linux_prom_registers *regs,
int num_regs)
{
if (num_ranges) {
int regnum;
for (regnum = 0; regnum < num_regs; regnum++) {
int rngnum;
for (rngnum = 0; rngnum < num_ranges; rngnum++) {
if (regs[regnum].which_io == ranges[rngnum].ot_child_space)
break;
}
if (rngnum == num_ranges) {
/* We used to flag this as an error. Actually
* some devices do not report the regs as we expect.
* For example, see SUNW,pln device. In that case
* the reg property is in a format internal to that
* node, ie. it is not in the SBUS register space
* per se. -DaveM
*/
return;
}
regs[regnum].which_io = ranges[rngnum].ot_parent_space;
regs[regnum].phys_addr -= ranges[rngnum].ot_child_base;
regs[regnum].phys_addr += ranges[rngnum].ot_parent_base;
}
}
}
static void __init __fixup_regs_sdev(struct sbus_dev *sdev)
{
if (sdev->num_registers != 0) {
struct sbus_dev *parent = sdev->parent;
int i;
while (parent != NULL) {
__apply_ranges_to_regs(parent->device_ranges,
parent->num_device_ranges,
sdev->reg_addrs,
sdev->num_registers);
parent = parent->parent;
}
__apply_ranges_to_regs(sdev->bus->sbus_ranges,
sdev->bus->num_sbus_ranges,
sdev->reg_addrs,
sdev->num_registers);
for (i = 0; i < sdev->num_registers; i++) {
struct resource *res = &sdev->resource[i];
res->start = sdev->reg_addrs[i].phys_addr;
res->end = (res->start +
(unsigned long)sdev->reg_addrs[i].reg_size - 1UL);
res->flags = IORESOURCE_IO |
(sdev->reg_addrs[i].which_io & 0xff);
}
}
}
static void __init sbus_fixup_all_regs(struct sbus_dev *first_sdev)
{
struct sbus_dev *sdev;
for (sdev = first_sdev; sdev; sdev = sdev->next) {
if (sdev->child)
sbus_fixup_all_regs(sdev->child);
__fixup_regs_sdev(sdev);
}
}
/* We preserve the "probe order" of these bus and device lists to give
* the same ordering as the old code.
*/
static void __init sbus_insert(struct sbus_bus *sbus, struct sbus_bus **root)
{
while (*root)
root = &(*root)->next;
*root = sbus;
sbus->next = NULL;
}
static void __init sdev_insert(struct sbus_dev *sdev, struct sbus_dev **root)
{
while (*root)
root = &(*root)->next;
*root = sdev;
sdev->next = NULL;
}
static void __init walk_children(struct device_node *dp, struct sbus_dev *parent, struct sbus_bus *sbus)
{
dp = dp->child;
while (dp) {
struct sbus_dev *sdev;
sdev = kzalloc(sizeof(struct sbus_dev), GFP_ATOMIC);
if (sdev) {
sdev_insert(sdev, &parent->child);
sdev->bus = sbus;
sdev->parent = parent;
sdev->ofdev.dev.archdata.iommu =
sbus->ofdev.dev.archdata.iommu;
sdev->ofdev.dev.archdata.stc =
sbus->ofdev.dev.archdata.stc;
fill_sbus_device(dp, sdev);
walk_children(dp, sdev, sbus);
}
dp = dp->sibling;
}
}
static void __init build_one_sbus(struct device_node *dp, int num_sbus)
{
struct sbus_bus *sbus;
unsigned int sbus_clock;
struct device_node *dev_dp;
sbus = kzalloc(sizeof(struct sbus_bus), GFP_ATOMIC);
if (!sbus)
return;
sbus_insert(sbus, &sbus_root);
sbus->prom_node = dp->node;
sbus_setup_iommu(sbus, dp);
printk("sbus%d: ", num_sbus);
sbus_clock = of_getintprop_default(dp, "clock-frequency",
(25*1000*1000));
sbus->clock_freq = sbus_clock;
printk("Clock %d.%d MHz\n", (int) ((sbus_clock/1000)/1000),
(int) (((sbus_clock/1000)%1000 != 0) ?
(((sbus_clock/1000)%1000) + 1000) : 0));
strcpy(sbus->prom_name, dp->name);
sbus_setup_arch_props(sbus, dp);
sbus_bus_ranges_init(dp, sbus);
sbus->ofdev.node = dp;
sbus->ofdev.dev.parent = NULL;
sbus->ofdev.dev.bus = &sbus_bus_type;
dev_set_name(&sbus->ofdev.dev, "sbus%d", num_sbus);
if (of_device_register(&sbus->ofdev) != 0)
printk(KERN_DEBUG "sbus: device registration error for %s!\n",
dev_name(&sbus->ofdev.dev));
dev_dp = dp->child;
while (dev_dp) {
struct sbus_dev *sdev;
sdev = kzalloc(sizeof(struct sbus_dev), GFP_ATOMIC);
if (sdev) {
sdev_insert(sdev, &sbus->devices);
sdev->bus = sbus;
sdev->parent = NULL;
sdev->ofdev.dev.archdata.iommu =
sbus->ofdev.dev.archdata.iommu;
sdev->ofdev.dev.archdata.stc =
sbus->ofdev.dev.archdata.stc;
fill_sbus_device(dev_dp, sdev);
walk_children(dev_dp, sdev, sbus);
}
dev_dp = dev_dp->sibling;
}
sbus_fixup_all_regs(sbus->devices);
}
static int __init sbus_init(void)
{
struct device_node *dp;
const char *sbus_name = "sbus";
int num_sbus = 0;
if (sbus_arch_preinit())
return 0;
if (sparc_cpu_model == sun4d)
sbus_name = "sbi";
for_each_node_by_name(dp, sbus_name) {
build_one_sbus(dp, num_sbus);
num_sbus++;
}
sbus_arch_postinit();
return 0;
}
subsys_initcall(sbus_init);
|
