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
|
/*
* WHCI UWB Multi-interface Controller enumerator.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* This file is released under the GNU GPL v2.
*/
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/uwb/whci.h>
#include <linux/uwb/umc.h>
struct whci_card {
struct pci_dev *pci;
void __iomem *uwbbase;
u8 n_caps;
struct umc_dev *devs[0];
};
/* Fix faulty HW :( */
static
u64 whci_capdata_quirks(struct whci_card *card, u64 capdata)
{
u64 capdata_orig = capdata;
struct pci_dev *pci_dev = card->pci;
if (pci_dev->vendor == PCI_VENDOR_ID_INTEL
&& (pci_dev->device == 0x0c3b || pci_dev->device == 0004)
&& pci_dev->class == 0x0d1010) {
switch (UWBCAPDATA_TO_CAP_ID(capdata)) {
/* WLP capability has 0x100 bytes of aperture */
case 0x80:
capdata |= 0x40 << 8; break;
/* WUSB capability has 0x80 bytes of aperture
* and ID is 1 */
case 0x02:
capdata &= ~0xffff;
capdata |= 0x2001;
break;
}
}
if (capdata_orig != capdata)
dev_warn(&pci_dev->dev,
"PCI v%04x d%04x c%06x#%02x: "
"corrected capdata from %016Lx to %016Lx\n",
pci_dev->vendor, pci_dev->device, pci_dev->class,
(unsigned)UWBCAPDATA_TO_CAP_ID(capdata),
(unsigned long long)capdata_orig,
(unsigned long long)capdata);
return capdata;
}
/**
* whci_wait_for - wait for a WHCI register to be set
*
* Polls (for at most @max_ms ms) until '*@reg & @mask == @result'.
*/
int whci_wait_for(struct device *dev, u32 __iomem *reg, u32 mask, u32 result,
unsigned long max_ms, const char *tag)
{
unsigned t = 0;
u32 val;
for (;;) {
val = le_readl(reg);
if ((val & mask) == result)
break;
if (t >= max_ms) {
dev_err(dev, "%s timed out\n", tag);
return -ETIMEDOUT;
}
msleep(10);
t += 10;
}
return 0;
}
EXPORT_SYMBOL_GPL(whci_wait_for);
/*
* NOTE: the capinfo and capdata registers are slightly different
* (size and cap-id fields). So for cap #0, we need to fill
* in. Size comes from the size of the register block
* (statically calculated); cap_id comes from nowhere, we use
* zero, that is reserved, for the radio controller, because
* none was defined at the spec level.
*/
static int whci_add_cap(struct whci_card *card, int n)
{
struct umc_dev *umc;
u64 capdata;
int bar, err;
umc = umc_device_create(&card->pci->dev, n);
if (umc == NULL)
return -ENOMEM;
capdata = le_readq(card->uwbbase + UWBCAPDATA(n));
bar = UWBCAPDATA_TO_BAR(capdata) << 1;
capdata = whci_capdata_quirks(card, capdata);
/* Capability 0 is the radio controller. It's size is 32
* bytes (WHCI0.95[2.3, T2-9]). */
umc->version = UWBCAPDATA_TO_VERSION(capdata);
umc->cap_id = n == 0 ? 0 : UWBCAPDATA_TO_CAP_ID(capdata);
umc->bar = bar;
umc->resource.start = pci_resource_start(card->pci, bar)
+ UWBCAPDATA_TO_OFFSET(capdata);
umc->resource.end = umc->resource.start
+ (n == 0 ? 0x20 : UWBCAPDATA_TO_SIZE(capdata)) - 1;
umc->resource.name = dev_name(&umc->dev);
umc->resource.flags = card->pci->resource[bar].flags;
umc->resource.parent = &card->pci->resource[bar];
umc->irq = card->pci->irq;
err = umc_device_register(umc);
if (err < 0)
goto error;
card->devs[n] = umc;
return 0;
error:
kfree(umc);
return err;
}
static void whci_del_cap(struct whci_card *card, int n)
{
struct umc_dev *umc = card->devs[n];
if (umc != NULL)
umc_device_unregister(umc);
}
static int whci_n_caps(struct pci_dev *pci)
{
void __iomem *uwbbase;
u64 capinfo;
uwbbase = pci_iomap(pci, 0, 8);
if (!uwbbase)
return -ENOMEM;
capinfo = le_readq(uwbbase + UWBCAPINFO);
pci_iounmap(pci, uwbbase);
return UWBCAPINFO_TO_N_CAPS(capinfo);
}
static int whci_probe(struct pci_dev *pci, const struct pci_device_id *id)
{
struct whci_card *card;
int err, n_caps, n;
err = pci_enable_device(pci);
if (err < 0)
goto error;
pci_enable_msi(pci);
pci_set_master(pci);
err = -ENXIO;
if (!pci_set_dma_mask(pci, DMA_BIT_MASK(64)))
pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64));
else if (!pci_set_dma_mask(pci, DMA_BIT_MASK(32)))
pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32));
else
goto error_dma;
err = n_caps = whci_n_caps(pci);
if (n_caps < 0)
goto error_ncaps;
err = -ENOMEM;
card = kzalloc(sizeof(struct whci_card)
+ sizeof(struct whci_dev *) * (n_caps + 1),
GFP_KERNEL);
if (card == NULL)
goto error_kzalloc;
card->pci = pci;
card->n_caps = n_caps;
err = -EBUSY;
if (!request_mem_region(pci_resource_start(pci, 0),
UWBCAPDATA_SIZE(card->n_caps),
"whci (capability data)"))
goto error_request_memregion;
err = -ENOMEM;
card->uwbbase = pci_iomap(pci, 0, UWBCAPDATA_SIZE(card->n_caps));
if (!card->uwbbase)
goto error_iomap;
/* Add each capability. */
for (n = 0; n <= card->n_caps; n++) {
err = whci_add_cap(card, n);
if (err < 0 && n == 0) {
dev_err(&pci->dev, "cannot bind UWB radio controller:"
" %d\n", err);
goto error_bind;
}
if (err < 0)
dev_warn(&pci->dev, "warning: cannot bind capability "
"#%u: %d\n", n, err);
}
pci_set_drvdata(pci, card);
return 0;
error_bind:
pci_iounmap(pci, card->uwbbase);
error_iomap:
release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps));
error_request_memregion:
kfree(card);
error_kzalloc:
error_ncaps:
error_dma:
pci_disable_msi(pci);
pci_disable_device(pci);
error:
return err;
}
static void whci_remove(struct pci_dev *pci)
{
struct whci_card *card = pci_get_drvdata(pci);
int n;
pci_set_drvdata(pci, NULL);
/* Unregister each capability in reverse (so the master device
* is unregistered last). */
for (n = card->n_caps; n >= 0 ; n--)
whci_del_cap(card, n);
pci_iounmap(pci, card->uwbbase);
release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps));
kfree(card);
pci_disable_msi(pci);
pci_disable_device(pci);
}
static struct pci_device_id whci_id_table[] = {
{ PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) },
{ 0 },
};
MODULE_DEVICE_TABLE(pci, whci_id_table);
static struct pci_driver whci_driver = {
.name = "whci",
.id_table = whci_id_table,
.probe = whci_probe,
.remove = whci_remove,
};
static int __init whci_init(void)
{
return pci_register_driver(&whci_driver);
}
static void __exit whci_exit(void)
{
pci_unregister_driver(&whci_driver);
}
module_init(whci_init);
module_exit(whci_exit);
MODULE_DESCRIPTION("WHCI UWB Multi-interface Controller enumerator");
MODULE_AUTHOR("Cambridge Silicon Radio Ltd.");
MODULE_LICENSE("GPL");
|
