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
|
/*
* Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
* Copyright 2009 Jonathan Corbet <corbet@lwn.net>
*/
/*
* Core code for the Via multifunction framebuffer device.
*/
#include "via-core.h"
#include "via_i2c.h"
#include "global.h"
#include <linux/module.h>
#include <linux/platform_device.h>
/*
* The default port config.
*/
static struct via_port_cfg adap_configs[] = {
[VIA_PORT_26] = { VIA_PORT_I2C, VIA_MODE_OFF, VIASR, 0x26 },
[VIA_PORT_31] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x31 },
[VIA_PORT_25] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
[VIA_PORT_2C] = { VIA_PORT_GPIO, VIA_MODE_I2C, VIASR, 0x2c },
[VIA_PORT_3D] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
{ 0, 0, 0, 0 }
};
/*
* We currently only support one viafb device (will there ever be
* more than one?), so just declare it globally here.
*/
static struct viafb_dev global_dev;
/*
* Figure out how big our framebuffer memory is. Kind of ugly,
* but evidently we can't trust the information found in the
* fbdev configuration area.
*/
static u16 via_function3[] = {
CLE266_FUNCTION3, KM400_FUNCTION3, CN400_FUNCTION3, CN700_FUNCTION3,
CX700_FUNCTION3, KM800_FUNCTION3, KM890_FUNCTION3, P4M890_FUNCTION3,
P4M900_FUNCTION3, VX800_FUNCTION3, VX855_FUNCTION3,
};
/* Get the BIOS-configured framebuffer size from PCI configuration space
* of function 3 in the respective chipset */
static int viafb_get_fb_size_from_pci(int chip_type)
{
int i;
u8 offset = 0;
u32 FBSize;
u32 VideoMemSize;
/* search for the "FUNCTION3" device in this chipset */
for (i = 0; i < ARRAY_SIZE(via_function3); i++) {
struct pci_dev *pdev;
pdev = pci_get_device(PCI_VENDOR_ID_VIA, via_function3[i],
NULL);
if (!pdev)
continue;
DEBUG_MSG(KERN_INFO "Device ID = %x\n", pdev->device);
switch (pdev->device) {
case CLE266_FUNCTION3:
case KM400_FUNCTION3:
offset = 0xE0;
break;
case CN400_FUNCTION3:
case CN700_FUNCTION3:
case CX700_FUNCTION3:
case KM800_FUNCTION3:
case KM890_FUNCTION3:
case P4M890_FUNCTION3:
case P4M900_FUNCTION3:
case VX800_FUNCTION3:
case VX855_FUNCTION3:
/*case CN750_FUNCTION3: */
offset = 0xA0;
break;
}
if (!offset)
break;
pci_read_config_dword(pdev, offset, &FBSize);
pci_dev_put(pdev);
}
if (!offset) {
printk(KERN_ERR "cannot determine framebuffer size\n");
return -EIO;
}
FBSize = FBSize & 0x00007000;
DEBUG_MSG(KERN_INFO "FB Size = %x\n", FBSize);
if (chip_type < UNICHROME_CX700) {
switch (FBSize) {
case 0x00004000:
VideoMemSize = (16 << 20); /*16M */
break;
case 0x00005000:
VideoMemSize = (32 << 20); /*32M */
break;
case 0x00006000:
VideoMemSize = (64 << 20); /*64M */
break;
default:
VideoMemSize = (32 << 20); /*32M */
break;
}
} else {
switch (FBSize) {
case 0x00001000:
VideoMemSize = (8 << 20); /*8M */
break;
case 0x00002000:
VideoMemSize = (16 << 20); /*16M */
break;
case 0x00003000:
VideoMemSize = (32 << 20); /*32M */
break;
case 0x00004000:
VideoMemSize = (64 << 20); /*64M */
break;
case 0x00005000:
VideoMemSize = (128 << 20); /*128M */
break;
case 0x00006000:
VideoMemSize = (256 << 20); /*256M */
break;
case 0x00007000: /* Only on VX855/875 */
VideoMemSize = (512 << 20); /*512M */
break;
default:
VideoMemSize = (32 << 20); /*32M */
break;
}
}
return VideoMemSize;
}
/*
* Figure out and map our MMIO regions.
*/
static int __devinit via_pci_setup_mmio(struct viafb_dev *vdev)
{
/*
* Hook up to the device registers.
*/
vdev->engine_start = pci_resource_start(vdev->pdev, 1);
vdev->engine_len = pci_resource_len(vdev->pdev, 1);
/* If this fails, others will notice later */
vdev->engine_mmio = ioremap_nocache(vdev->engine_start,
vdev->engine_len);
/*
* Likewise with I/O memory.
*/
vdev->fbmem_start = pci_resource_start(vdev->pdev, 0);
vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type);
if (vdev->fbmem_len < 0)
return vdev->fbmem_len;
vdev->fbmem = ioremap_nocache(vdev->fbmem_start, vdev->fbmem_len);
if (vdev->fbmem == NULL)
return -ENOMEM;
return 0;
}
static void __devexit via_pci_teardown_mmio(struct viafb_dev *vdev)
{
iounmap(vdev->fbmem);
iounmap(vdev->engine_mmio);
}
static int __devinit via_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret;
ret = pci_enable_device(pdev);
if (ret)
return ret;
/*
* Global device initialization.
*/
memset(&global_dev, 0, sizeof(global_dev));
global_dev.pdev = pdev;
global_dev.chip_type = ent->driver_data;
spin_lock_init(&global_dev.reg_lock);
ret = via_pci_setup_mmio(&global_dev);
if (ret)
goto out_disable;
/*
* Create the I2C busses. Bailing out on failure seems extreme,
* but that's what the code did before.
*/
ret = viafb_create_i2c_busses(adap_configs);
if (ret)
goto out_teardown;
/*
* Set up the framebuffer.
*/
ret = via_fb_pci_probe(&global_dev);
if (ret)
goto out_i2c;
return 0;
out_i2c:
viafb_delete_i2c_busses();
out_teardown:
via_pci_teardown_mmio(&global_dev);
out_disable:
pci_disable_device(pdev);
return ret;
}
static void __devexit via_pci_remove(struct pci_dev *pdev)
{
viafb_delete_i2c_busses();
via_fb_pci_remove(pdev);
via_pci_teardown_mmio(&global_dev);
pci_disable_device(pdev);
}
static struct pci_device_id via_pci_table[] __devinitdata = {
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CLE266_DID),
.driver_data = UNICHROME_CLE266 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_PM800_DID),
.driver_data = UNICHROME_PM800 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K400_DID),
.driver_data = UNICHROME_K400 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K800_DID),
.driver_data = UNICHROME_K800 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M890_DID),
.driver_data = UNICHROME_CN700 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K8M890_DID),
.driver_data = UNICHROME_K8M890 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CX700_DID),
.driver_data = UNICHROME_CX700 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M900_DID),
.driver_data = UNICHROME_P4M900 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN750_DID),
.driver_data = UNICHROME_CN750 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX800_DID),
.driver_data = UNICHROME_VX800 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX855_DID),
.driver_data = UNICHROME_VX855 },
{ }
};
MODULE_DEVICE_TABLE(pci, via_pci_table);
static struct pci_driver via_driver = {
.name = "viafb",
.id_table = via_pci_table,
.probe = via_pci_probe,
.remove = __devexit_p(via_pci_remove),
};
static int __init via_core_init(void)
{
int ret;
ret = viafb_init();
if (ret)
return ret;
return pci_register_driver(&via_driver);
}
static void __exit via_core_exit(void)
{
pci_unregister_driver(&via_driver);
viafb_exit();
}
module_init(via_core_init);
module_exit(via_core_exit);
|
