Commit | Line | Data |
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8f1b678a DV |
1 | /* |
2 | * WHCI UWB Multi-interface Controller enumerator. | |
3 | * | |
4 | * Copyright (C) 2007 Cambridge Silicon Radio Ltd. | |
5 | * | |
6 | * This file is released under the GNU GPL v2. | |
7 | */ | |
8 | #include <linux/delay.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/pci.h> | |
11 | #include <linux/dma-mapping.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
8f1b678a DV |
13 | #include <linux/uwb/whci.h> |
14 | #include <linux/uwb/umc.h> | |
15 | ||
16 | struct whci_card { | |
17 | struct pci_dev *pci; | |
18 | void __iomem *uwbbase; | |
19 | u8 n_caps; | |
20 | struct umc_dev *devs[0]; | |
21 | }; | |
22 | ||
23 | ||
24 | /* Fix faulty HW :( */ | |
25 | static | |
26 | u64 whci_capdata_quirks(struct whci_card *card, u64 capdata) | |
27 | { | |
28 | u64 capdata_orig = capdata; | |
29 | struct pci_dev *pci_dev = card->pci; | |
30 | if (pci_dev->vendor == PCI_VENDOR_ID_INTEL | |
31 | && (pci_dev->device == 0x0c3b || pci_dev->device == 0004) | |
32 | && pci_dev->class == 0x0d1010) { | |
33 | switch (UWBCAPDATA_TO_CAP_ID(capdata)) { | |
34 | /* WLP capability has 0x100 bytes of aperture */ | |
35 | case 0x80: | |
36 | capdata |= 0x40 << 8; break; | |
37 | /* WUSB capability has 0x80 bytes of aperture | |
38 | * and ID is 1 */ | |
39 | case 0x02: | |
40 | capdata &= ~0xffff; | |
41 | capdata |= 0x2001; | |
42 | break; | |
43 | } | |
44 | } | |
45 | if (capdata_orig != capdata) | |
46 | dev_warn(&pci_dev->dev, | |
47 | "PCI v%04x d%04x c%06x#%02x: " | |
48 | "corrected capdata from %016Lx to %016Lx\n", | |
49 | pci_dev->vendor, pci_dev->device, pci_dev->class, | |
50 | (unsigned)UWBCAPDATA_TO_CAP_ID(capdata), | |
51 | (unsigned long long)capdata_orig, | |
52 | (unsigned long long)capdata); | |
53 | return capdata; | |
54 | } | |
55 | ||
56 | ||
57 | /** | |
58 | * whci_wait_for - wait for a WHCI register to be set | |
59 | * | |
60 | * Polls (for at most @max_ms ms) until '*@reg & @mask == @result'. | |
61 | */ | |
62 | int whci_wait_for(struct device *dev, u32 __iomem *reg, u32 mask, u32 result, | |
63 | unsigned long max_ms, const char *tag) | |
64 | { | |
65 | unsigned t = 0; | |
66 | u32 val; | |
67 | for (;;) { | |
68 | val = le_readl(reg); | |
69 | if ((val & mask) == result) | |
70 | break; | |
8f1b678a | 71 | if (t >= max_ms) { |
5a4e1a79 | 72 | dev_err(dev, "%s timed out\n", tag); |
8f1b678a DV |
73 | return -ETIMEDOUT; |
74 | } | |
5a4e1a79 | 75 | msleep(10); |
8f1b678a DV |
76 | t += 10; |
77 | } | |
78 | return 0; | |
79 | } | |
80 | EXPORT_SYMBOL_GPL(whci_wait_for); | |
81 | ||
82 | ||
83 | /* | |
84 | * NOTE: the capinfo and capdata registers are slightly different | |
85 | * (size and cap-id fields). So for cap #0, we need to fill | |
86 | * in. Size comes from the size of the register block | |
87 | * (statically calculated); cap_id comes from nowhere, we use | |
88 | * zero, that is reserved, for the radio controller, because | |
89 | * none was defined at the spec level. | |
90 | */ | |
91 | static int whci_add_cap(struct whci_card *card, int n) | |
92 | { | |
93 | struct umc_dev *umc; | |
94 | u64 capdata; | |
95 | int bar, err; | |
96 | ||
97 | umc = umc_device_create(&card->pci->dev, n); | |
98 | if (umc == NULL) | |
99 | return -ENOMEM; | |
100 | ||
101 | capdata = le_readq(card->uwbbase + UWBCAPDATA(n)); | |
102 | ||
103 | bar = UWBCAPDATA_TO_BAR(capdata) << 1; | |
104 | ||
105 | capdata = whci_capdata_quirks(card, capdata); | |
106 | /* Capability 0 is the radio controller. It's size is 32 | |
107 | * bytes (WHCI0.95[2.3, T2-9]). */ | |
108 | umc->version = UWBCAPDATA_TO_VERSION(capdata); | |
109 | umc->cap_id = n == 0 ? 0 : UWBCAPDATA_TO_CAP_ID(capdata); | |
110 | umc->bar = bar; | |
111 | umc->resource.start = pci_resource_start(card->pci, bar) | |
112 | + UWBCAPDATA_TO_OFFSET(capdata); | |
113 | umc->resource.end = umc->resource.start | |
114 | + (n == 0 ? 0x20 : UWBCAPDATA_TO_SIZE(capdata)) - 1; | |
ae9eba0e | 115 | umc->resource.name = dev_name(&umc->dev); |
8f1b678a DV |
116 | umc->resource.flags = card->pci->resource[bar].flags; |
117 | umc->resource.parent = &card->pci->resource[bar]; | |
118 | umc->irq = card->pci->irq; | |
119 | ||
120 | err = umc_device_register(umc); | |
121 | if (err < 0) | |
122 | goto error; | |
123 | card->devs[n] = umc; | |
124 | return 0; | |
125 | ||
126 | error: | |
127 | kfree(umc); | |
128 | return err; | |
129 | } | |
130 | ||
131 | static void whci_del_cap(struct whci_card *card, int n) | |
132 | { | |
133 | struct umc_dev *umc = card->devs[n]; | |
134 | ||
135 | if (umc != NULL) | |
136 | umc_device_unregister(umc); | |
137 | } | |
138 | ||
139 | static int whci_n_caps(struct pci_dev *pci) | |
140 | { | |
141 | void __iomem *uwbbase; | |
142 | u64 capinfo; | |
143 | ||
144 | uwbbase = pci_iomap(pci, 0, 8); | |
145 | if (!uwbbase) | |
146 | return -ENOMEM; | |
147 | capinfo = le_readq(uwbbase + UWBCAPINFO); | |
148 | pci_iounmap(pci, uwbbase); | |
149 | ||
150 | return UWBCAPINFO_TO_N_CAPS(capinfo); | |
151 | } | |
152 | ||
153 | static int whci_probe(struct pci_dev *pci, const struct pci_device_id *id) | |
154 | { | |
155 | struct whci_card *card; | |
156 | int err, n_caps, n; | |
157 | ||
158 | err = pci_enable_device(pci); | |
159 | if (err < 0) | |
160 | goto error; | |
161 | pci_enable_msi(pci); | |
162 | pci_set_master(pci); | |
163 | err = -ENXIO; | |
6a35528a YH |
164 | if (!pci_set_dma_mask(pci, DMA_BIT_MASK(64))) |
165 | pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64)); | |
284901a9 YH |
166 | else if (!pci_set_dma_mask(pci, DMA_BIT_MASK(32))) |
167 | pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)); | |
8f1b678a DV |
168 | else |
169 | goto error_dma; | |
170 | ||
171 | err = n_caps = whci_n_caps(pci); | |
172 | if (n_caps < 0) | |
173 | goto error_ncaps; | |
174 | ||
175 | err = -ENOMEM; | |
176 | card = kzalloc(sizeof(struct whci_card) | |
177 | + sizeof(struct whci_dev *) * (n_caps + 1), | |
178 | GFP_KERNEL); | |
179 | if (card == NULL) | |
180 | goto error_kzalloc; | |
181 | card->pci = pci; | |
182 | card->n_caps = n_caps; | |
183 | ||
184 | err = -EBUSY; | |
185 | if (!request_mem_region(pci_resource_start(pci, 0), | |
186 | UWBCAPDATA_SIZE(card->n_caps), | |
187 | "whci (capability data)")) | |
188 | goto error_request_memregion; | |
189 | err = -ENOMEM; | |
190 | card->uwbbase = pci_iomap(pci, 0, UWBCAPDATA_SIZE(card->n_caps)); | |
191 | if (!card->uwbbase) | |
192 | goto error_iomap; | |
193 | ||
194 | /* Add each capability. */ | |
195 | for (n = 0; n <= card->n_caps; n++) { | |
196 | err = whci_add_cap(card, n); | |
197 | if (err < 0 && n == 0) { | |
198 | dev_err(&pci->dev, "cannot bind UWB radio controller:" | |
199 | " %d\n", err); | |
200 | goto error_bind; | |
201 | } | |
202 | if (err < 0) | |
203 | dev_warn(&pci->dev, "warning: cannot bind capability " | |
204 | "#%u: %d\n", n, err); | |
205 | } | |
206 | pci_set_drvdata(pci, card); | |
207 | return 0; | |
208 | ||
209 | error_bind: | |
210 | pci_iounmap(pci, card->uwbbase); | |
211 | error_iomap: | |
212 | release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps)); | |
213 | error_request_memregion: | |
214 | kfree(card); | |
215 | error_kzalloc: | |
216 | error_ncaps: | |
217 | error_dma: | |
218 | pci_disable_msi(pci); | |
219 | pci_disable_device(pci); | |
220 | error: | |
221 | return err; | |
222 | } | |
223 | ||
224 | static void whci_remove(struct pci_dev *pci) | |
225 | { | |
226 | struct whci_card *card = pci_get_drvdata(pci); | |
227 | int n; | |
228 | ||
229 | pci_set_drvdata(pci, NULL); | |
230 | /* Unregister each capability in reverse (so the master device | |
231 | * is unregistered last). */ | |
232 | for (n = card->n_caps; n >= 0 ; n--) | |
233 | whci_del_cap(card, n); | |
234 | pci_iounmap(pci, card->uwbbase); | |
235 | release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps)); | |
236 | kfree(card); | |
237 | pci_disable_msi(pci); | |
238 | pci_disable_device(pci); | |
239 | } | |
240 | ||
241 | static struct pci_device_id whci_id_table[] = { | |
242 | { PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) }, | |
243 | { 0 }, | |
244 | }; | |
245 | MODULE_DEVICE_TABLE(pci, whci_id_table); | |
246 | ||
247 | ||
248 | static struct pci_driver whci_driver = { | |
249 | .name = "whci", | |
250 | .id_table = whci_id_table, | |
251 | .probe = whci_probe, | |
252 | .remove = whci_remove, | |
253 | }; | |
254 | ||
255 | static int __init whci_init(void) | |
256 | { | |
257 | return pci_register_driver(&whci_driver); | |
258 | } | |
259 | ||
260 | static void __exit whci_exit(void) | |
261 | { | |
262 | pci_unregister_driver(&whci_driver); | |
263 | } | |
264 | ||
265 | module_init(whci_init); | |
266 | module_exit(whci_exit); | |
267 | ||
268 | MODULE_DESCRIPTION("WHCI UWB Multi-interface Controller enumerator"); | |
269 | MODULE_AUTHOR("Cambridge Silicon Radio Ltd."); | |
270 | MODULE_LICENSE("GPL"); |