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
|
/* Copyright 2004 Linux Networx */
/* This code is distrubted wihtout warrant under the GPL v2 (see COPYING) */
#include <console/console.h>
#include <stdlib.h>
#include <stdint.h>
#include <bitops.h>
#include <string.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pnp.h>
/* PNP fundamental operations */
void pnp_write_config(device_t dev, uint8_t reg, uint8_t value)
{
outb(reg, dev->path.u.pnp.port);
outb(value, dev->path.u.pnp.port + 1);
}
uint8_t pnp_read_config(device_t dev, uint8_t reg)
{
outb(reg, dev->path.u.pnp.port);
return inb(dev->path.u.pnp.port + 1);
}
void pnp_set_logical_device(device_t dev)
{
pnp_write_config(dev, 0x07, dev->path.u.pnp.device);
}
void pnp_set_enable(device_t dev, int enable)
{
pnp_write_config(dev, 0x30, enable?0x1:0x0);
}
int pnp_read_enable(device_t dev)
{
return !!pnp_read_config(dev, 0x30);
}
void pnp_set_iobase(device_t dev, unsigned index, unsigned iobase)
{
/* Index == 0x60 or 0x62 */
pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff);
pnp_write_config(dev, index + 1, iobase & 0xff);
}
void pnp_set_irq(device_t dev, unsigned index, unsigned irq)
{
/* Index == 0x70 or 0x72 */
pnp_write_config(dev, index, irq);
}
void pnp_set_drq(device_t dev, unsigned drq, unsigned index)
{
/* Index == 0x74 */
pnp_write_config(dev, index, drq & 0xff);
}
/* PNP device operations */
void pnp_read_resources(device_t dev)
{
return;
}
static void pnp_set_resource(device_t dev, struct resource *resource)
{
if (!(resource->flags & IORESOURCE_ASSIGNED)) {
printk_err("ERROR: %s %02x not allocated\n",
dev_path(dev), resource->index);
return;
}
/* Now store the resource */
if (resource->flags & IORESOURCE_IO) {
pnp_set_iobase(dev, resource->index, resource->base);
}
else if (resource->flags & IORESOURCE_DRQ) {
pnp_set_drq(dev, resource->index, resource->base);
}
else if (resource->flags & IORESOURCE_IRQ) {
pnp_set_irq(dev, resource->index, resource->base);
}
else {
printk_err("ERROR: %s %02x unknown resource type\n",
dev_path(dev), resource->index);
return;
}
resource->flags |= IORESOURCE_STORED;
report_resource_stored(dev, resource, "");
}
void pnp_set_resources(device_t dev)
{
int i;
/* Select the device */
pnp_set_logical_device(dev);
/* Paranoia says I should disable the device here... */
for(i = 0; i < dev->resources; i++) {
pnp_set_resource(dev, &dev->resource[i]);
}
}
void pnp_enable_resources(device_t dev)
{
pnp_set_logical_device(dev);
pnp_set_enable(dev, 1);
}
void pnp_enable(device_t dev)
{
if (!dev->enabled) {
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
}
}
struct device_operations pnp_ops = {
.read_resources = pnp_read_resources,
.set_resources = pnp_set_resources,
.enable_resources = pnp_enable_resources,
.enable = pnp_enable,
};
/* PNP chip opertations */
static void pnp_get_ioresource(device_t dev, unsigned index, struct io_info *info)
{
struct resource *resource;
unsigned moving, gran, step;
resource = new_resource(dev, index);
/* Initilize the resource */
resource->limit = 0xffff;
resource->flags |= IORESOURCE_IO;
/* Get the resource size */
moving = info->mask;
gran = 15;
step = 1 << gran;
/* Find the first bit that moves */
while((moving & step) == 0) {
gran--;
step >>= 1;
}
/* Now find the first bit that does not move */
while((moving & step) != 0) {
gran--;
step >>= 1;
}
/* Of the moving bits the last bit in the first group,
* tells us the size of this resource.
*/
if ((moving & step) == 0) {
gran++;
step <<= 1;
}
/* Set the resource size and alignment */
resource->gran = gran;
resource->align = gran;
resource->limit = info->mask | (step - 1);
resource->size = 1 << gran;
}
static void get_resources(device_t dev, struct pnp_info *info)
{
struct resource *resource;
if (info->flags & PNP_IO0) {
pnp_get_ioresource(dev, PNP_IDX_IO0, &info->io0);
}
if (info->flags & PNP_IO1) {
pnp_get_ioresource(dev, PNP_IDX_IO1, &info->io1);
}
if (info->flags & PNP_IO2) {
pnp_get_ioresource(dev, PNP_IDX_IO2, &info->io2);
}
if (info->flags & PNP_IO3) {
pnp_get_ioresource(dev, PNP_IDX_IO3, &info->io3);
}
if (info->flags & PNP_IRQ0) {
resource = new_resource(dev, PNP_IDX_IRQ0);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
if (info->flags & PNP_IRQ1) {
resource = new_resource(dev, PNP_IDX_IRQ1);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
if (info->flags & PNP_DRQ0) {
resource = new_resource(dev, PNP_IDX_DRQ0);
resource->size = 1;
resource->flags |= IORESOURCE_DRQ;
}
if (info->flags & PNP_DRQ1) {
resource = new_resource(dev, PNP_IDX_DRQ1);
resource->size = 1;
resource->flags |= IORESOURCE_DRQ;
}
}
void pnp_enable_devices(device_t base_dev, struct device_operations *ops,
unsigned functions, struct pnp_info *info)
{
struct device_path path;
device_t dev;
int i;
path.type = DEVICE_PATH_PNP;
path.u.pnp.port = base_dev->path.u.pnp.port;
/* Setup the ops and resources on the newly allocated devices */
for(i = 0; i < functions; i++) {
path.u.pnp.device = info[i].function;
dev = alloc_find_dev(base_dev->bus, &path);
/* Don't initialize a device multiple times */
if (dev->ops)
continue;
if (info[i].ops == 0) {
dev->ops = ops;
} else {
dev->ops = info[i].ops;
}
get_resources(dev, &info[i]);
}
}
|
