]>
Commit | Line | Data |
---|---|---|
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> | |
c7394efc | 10 | #include <linux/module.h> |
8f1b678a DV |
11 | #include <linux/pci.h> |
12 | #include <linux/dma-mapping.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
8f1b678a DV |
14 | #include <linux/uwb/whci.h> |
15 | #include <linux/uwb/umc.h> | |
16 | ||
17 | struct whci_card { | |
18 | struct pci_dev *pci; | |
19 | void __iomem *uwbbase; | |
20 | u8 n_caps; | |
21 | struct umc_dev *devs[0]; | |
22 | }; | |
23 | ||
24 | ||
25 | /* Fix faulty HW :( */ | |
26 | static | |
27 | u64 whci_capdata_quirks(struct whci_card *card, u64 capdata) | |
28 | { | |
29 | u64 capdata_orig = capdata; | |
30 | struct pci_dev *pci_dev = card->pci; | |
31 | if (pci_dev->vendor == PCI_VENDOR_ID_INTEL | |
32 | && (pci_dev->device == 0x0c3b || pci_dev->device == 0004) | |
33 | && pci_dev->class == 0x0d1010) { | |
34 | switch (UWBCAPDATA_TO_CAP_ID(capdata)) { | |
35 | /* WLP capability has 0x100 bytes of aperture */ | |
36 | case 0x80: | |
37 | capdata |= 0x40 << 8; break; | |
38 | /* WUSB capability has 0x80 bytes of aperture | |
39 | * and ID is 1 */ | |
40 | case 0x02: | |
41 | capdata &= ~0xffff; | |
42 | capdata |= 0x2001; | |
43 | break; | |
44 | } | |
45 | } | |
46 | if (capdata_orig != capdata) | |
47 | dev_warn(&pci_dev->dev, | |
48 | "PCI v%04x d%04x c%06x#%02x: " | |
49 | "corrected capdata from %016Lx to %016Lx\n", | |
50 | pci_dev->vendor, pci_dev->device, pci_dev->class, | |
51 | (unsigned)UWBCAPDATA_TO_CAP_ID(capdata), | |
52 | (unsigned long long)capdata_orig, | |
53 | (unsigned long long)capdata); | |
54 | return capdata; | |
55 | } | |
56 | ||
57 | ||
58 | /** | |
59 | * whci_wait_for - wait for a WHCI register to be set | |
60 | * | |
61 | * Polls (for at most @max_ms ms) until '*@reg & @mask == @result'. | |
62 | */ | |
63 | int whci_wait_for(struct device *dev, u32 __iomem *reg, u32 mask, u32 result, | |
64 | unsigned long max_ms, const char *tag) | |
65 | { | |
66 | unsigned t = 0; | |
67 | u32 val; | |
68 | for (;;) { | |
69 | val = le_readl(reg); | |
70 | if ((val & mask) == result) | |
71 | break; | |
8f1b678a | 72 | if (t >= max_ms) { |
5a4e1a79 | 73 | dev_err(dev, "%s timed out\n", tag); |
8f1b678a DV |
74 | return -ETIMEDOUT; |
75 | } | |
5a4e1a79 | 76 | msleep(10); |
8f1b678a DV |
77 | t += 10; |
78 | } | |
79 | return 0; | |
80 | } | |
81 | EXPORT_SYMBOL_GPL(whci_wait_for); | |
82 | ||
83 | ||
84 | /* | |
85 | * NOTE: the capinfo and capdata registers are slightly different | |
86 | * (size and cap-id fields). So for cap #0, we need to fill | |
87 | * in. Size comes from the size of the register block | |
88 | * (statically calculated); cap_id comes from nowhere, we use | |
89 | * zero, that is reserved, for the radio controller, because | |
90 | * none was defined at the spec level. | |
91 | */ | |
92 | static int whci_add_cap(struct whci_card *card, int n) | |
93 | { | |
94 | struct umc_dev *umc; | |
95 | u64 capdata; | |
96 | int bar, err; | |
97 | ||
98 | umc = umc_device_create(&card->pci->dev, n); | |
99 | if (umc == NULL) | |
100 | return -ENOMEM; | |
101 | ||
102 | capdata = le_readq(card->uwbbase + UWBCAPDATA(n)); | |
103 | ||
104 | bar = UWBCAPDATA_TO_BAR(capdata) << 1; | |
105 | ||
106 | capdata = whci_capdata_quirks(card, capdata); | |
107 | /* Capability 0 is the radio controller. It's size is 32 | |
108 | * bytes (WHCI0.95[2.3, T2-9]). */ | |
109 | umc->version = UWBCAPDATA_TO_VERSION(capdata); | |
110 | umc->cap_id = n == 0 ? 0 : UWBCAPDATA_TO_CAP_ID(capdata); | |
111 | umc->bar = bar; | |
112 | umc->resource.start = pci_resource_start(card->pci, bar) | |
113 | + UWBCAPDATA_TO_OFFSET(capdata); | |
114 | umc->resource.end = umc->resource.start | |
115 | + (n == 0 ? 0x20 : UWBCAPDATA_TO_SIZE(capdata)) - 1; | |
ae9eba0e | 116 | umc->resource.name = dev_name(&umc->dev); |
8f1b678a DV |
117 | umc->resource.flags = card->pci->resource[bar].flags; |
118 | umc->resource.parent = &card->pci->resource[bar]; | |
119 | umc->irq = card->pci->irq; | |
120 | ||
121 | err = umc_device_register(umc); | |
122 | if (err < 0) | |
123 | goto error; | |
124 | card->devs[n] = umc; | |
125 | return 0; | |
126 | ||
127 | error: | |
128 | kfree(umc); | |
129 | return err; | |
130 | } | |
131 | ||
132 | static void whci_del_cap(struct whci_card *card, int n) | |
133 | { | |
134 | struct umc_dev *umc = card->devs[n]; | |
135 | ||
136 | if (umc != NULL) | |
137 | umc_device_unregister(umc); | |
138 | } | |
139 | ||
140 | static int whci_n_caps(struct pci_dev *pci) | |
141 | { | |
142 | void __iomem *uwbbase; | |
143 | u64 capinfo; | |
144 | ||
145 | uwbbase = pci_iomap(pci, 0, 8); | |
146 | if (!uwbbase) | |
147 | return -ENOMEM; | |
148 | capinfo = le_readq(uwbbase + UWBCAPINFO); | |
149 | pci_iounmap(pci, uwbbase); | |
150 | ||
151 | return UWBCAPINFO_TO_N_CAPS(capinfo); | |
152 | } | |
153 | ||
154 | static int whci_probe(struct pci_dev *pci, const struct pci_device_id *id) | |
155 | { | |
156 | struct whci_card *card; | |
157 | int err, n_caps, n; | |
158 | ||
159 | err = pci_enable_device(pci); | |
160 | if (err < 0) | |
161 | goto error; | |
162 | pci_enable_msi(pci); | |
163 | pci_set_master(pci); | |
164 | err = -ENXIO; | |
6a35528a YH |
165 | if (!pci_set_dma_mask(pci, DMA_BIT_MASK(64))) |
166 | pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64)); | |
284901a9 YH |
167 | else if (!pci_set_dma_mask(pci, DMA_BIT_MASK(32))) |
168 | pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)); | |
8f1b678a DV |
169 | else |
170 | goto error_dma; | |
171 | ||
172 | err = n_caps = whci_n_caps(pci); | |
173 | if (n_caps < 0) | |
174 | goto error_ncaps; | |
175 | ||
176 | err = -ENOMEM; | |
177 | card = kzalloc(sizeof(struct whci_card) | |
178 | + sizeof(struct whci_dev *) * (n_caps + 1), | |
179 | GFP_KERNEL); | |
180 | if (card == NULL) | |
181 | goto error_kzalloc; | |
182 | card->pci = pci; | |
183 | card->n_caps = n_caps; | |
184 | ||
185 | err = -EBUSY; | |
186 | if (!request_mem_region(pci_resource_start(pci, 0), | |
187 | UWBCAPDATA_SIZE(card->n_caps), | |
188 | "whci (capability data)")) | |
189 | goto error_request_memregion; | |
190 | err = -ENOMEM; | |
191 | card->uwbbase = pci_iomap(pci, 0, UWBCAPDATA_SIZE(card->n_caps)); | |
192 | if (!card->uwbbase) | |
193 | goto error_iomap; | |
194 | ||
195 | /* Add each capability. */ | |
196 | for (n = 0; n <= card->n_caps; n++) { | |
197 | err = whci_add_cap(card, n); | |
198 | if (err < 0 && n == 0) { | |
199 | dev_err(&pci->dev, "cannot bind UWB radio controller:" | |
200 | " %d\n", err); | |
201 | goto error_bind; | |
202 | } | |
203 | if (err < 0) | |
204 | dev_warn(&pci->dev, "warning: cannot bind capability " | |
205 | "#%u: %d\n", n, err); | |
206 | } | |
207 | pci_set_drvdata(pci, card); | |
208 | return 0; | |
209 | ||
210 | error_bind: | |
211 | pci_iounmap(pci, card->uwbbase); | |
212 | error_iomap: | |
213 | release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps)); | |
214 | error_request_memregion: | |
215 | kfree(card); | |
216 | error_kzalloc: | |
217 | error_ncaps: | |
218 | error_dma: | |
219 | pci_disable_msi(pci); | |
220 | pci_disable_device(pci); | |
221 | error: | |
222 | return err; | |
223 | } | |
224 | ||
225 | static void whci_remove(struct pci_dev *pci) | |
226 | { | |
227 | struct whci_card *card = pci_get_drvdata(pci); | |
228 | int n; | |
229 | ||
230 | pci_set_drvdata(pci, NULL); | |
231 | /* Unregister each capability in reverse (so the master device | |
232 | * is unregistered last). */ | |
233 | for (n = card->n_caps; n >= 0 ; n--) | |
234 | whci_del_cap(card, n); | |
235 | pci_iounmap(pci, card->uwbbase); | |
236 | release_mem_region(pci_resource_start(pci, 0), UWBCAPDATA_SIZE(card->n_caps)); | |
237 | kfree(card); | |
238 | pci_disable_msi(pci); | |
239 | pci_disable_device(pci); | |
240 | } | |
241 | ||
242 | static struct pci_device_id whci_id_table[] = { | |
243 | { PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) }, | |
244 | { 0 }, | |
245 | }; | |
246 | MODULE_DEVICE_TABLE(pci, whci_id_table); | |
247 | ||
248 | ||
249 | static struct pci_driver whci_driver = { | |
250 | .name = "whci", | |
251 | .id_table = whci_id_table, | |
252 | .probe = whci_probe, | |
253 | .remove = whci_remove, | |
254 | }; | |
255 | ||
c0c6e079 | 256 | module_pci_driver(whci_driver); |
8f1b678a DV |
257 | MODULE_DESCRIPTION("WHCI UWB Multi-interface Controller enumerator"); |
258 | MODULE_AUTHOR("Cambridge Silicon Radio Ltd."); | |
259 | MODULE_LICENSE("GPL"); |