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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | SMBus driver for nVidia nForce2 MCP | |
3 | ||
4 | Added nForce3 Pro 150 Thomas Leibold <thomas@plx.com>, | |
5 | Ported to 2.5 Patrick Dreker <patrick@dreker.de>, | |
6 | Copyright (c) 2003 Hans-Frieder Vogt <hfvogt@arcor.de>, | |
7 | Based on | |
8 | SMBus 2.0 driver for AMD-8111 IO-Hub | |
9 | Copyright (c) 2002 Vojtech Pavlik | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
26 | /* | |
27 | SUPPORTED DEVICES PCI ID | |
28 | nForce2 MCP 0064 | |
29 | nForce2 Ultra 400 MCP 0084 | |
30 | nForce3 Pro150 MCP 00D4 | |
31 | nForce3 250Gb MCP 00E4 | |
32 | nForce4 MCP 0052 | |
7c72ccf0 | 33 | nForce4 MCP-04 0034 |
d2dd14ac JD |
34 | nForce MCP51 0264 |
35 | nForce MCP55 0368 | |
f75803de JD |
36 | nForce MCP61 03EB |
37 | nForce MCP65 0446 | |
d2dd14ac JD |
38 | nForce MCP67 0542 |
39 | nForce MCP73 07D8 | |
40 | nForce MCP78S 0752 | |
41 | nForce MCP79 0AA2 | |
1da177e4 LT |
42 | |
43 | This driver supports the 2 SMBuses that are included in the MCP of the | |
ad04d5c3 | 44 | nForce2/3/4/5xx chipsets. |
1da177e4 LT |
45 | */ |
46 | ||
47 | /* Note: we assume there can only be one nForce2, with two SMBus interfaces */ | |
48 | ||
1da177e4 LT |
49 | #include <linux/module.h> |
50 | #include <linux/pci.h> | |
51 | #include <linux/kernel.h> | |
52 | #include <linux/stddef.h> | |
1da177e4 LT |
53 | #include <linux/ioport.h> |
54 | #include <linux/init.h> | |
55 | #include <linux/i2c.h> | |
56 | #include <linux/delay.h> | |
08851d6e | 57 | #include <linux/dmi.h> |
54fb4a05 | 58 | #include <linux/acpi.h> |
1da177e4 LT |
59 | #include <asm/io.h> |
60 | ||
61 | MODULE_LICENSE("GPL"); | |
ad04d5c3 HFV |
62 | MODULE_AUTHOR ("Hans-Frieder Vogt <hfvogt@gmx.net>"); |
63 | MODULE_DESCRIPTION("nForce2/3/4/5xx SMBus driver"); | |
1da177e4 LT |
64 | |
65 | ||
66 | struct nforce2_smbus { | |
1da177e4 LT |
67 | struct i2c_adapter adapter; |
68 | int base; | |
69 | int size; | |
b53c8221 | 70 | int blockops; |
d49584c4 | 71 | int can_abort; |
1da177e4 LT |
72 | }; |
73 | ||
74 | ||
75 | /* | |
76 | * nVidia nForce2 SMBus control register definitions | |
5c7ae658 | 77 | * (Newer incarnations use standard BARs 4 and 5 instead) |
1da177e4 LT |
78 | */ |
79 | #define NFORCE_PCI_SMB1 0x50 | |
80 | #define NFORCE_PCI_SMB2 0x54 | |
81 | ||
82 | ||
83 | /* | |
84 | * ACPI 2.0 chapter 13 SMBus 2.0 EC register model | |
85 | */ | |
86 | #define NVIDIA_SMB_PRTCL (smbus->base + 0x00) /* protocol, PEC */ | |
87 | #define NVIDIA_SMB_STS (smbus->base + 0x01) /* status */ | |
88 | #define NVIDIA_SMB_ADDR (smbus->base + 0x02) /* address */ | |
89 | #define NVIDIA_SMB_CMD (smbus->base + 0x03) /* command */ | |
90 | #define NVIDIA_SMB_DATA (smbus->base + 0x04) /* 32 data registers */ | |
b53c8221 OR |
91 | #define NVIDIA_SMB_BCNT (smbus->base + 0x24) /* number of data |
92 | bytes */ | |
d49584c4 OR |
93 | #define NVIDIA_SMB_STATUS_ABRT (smbus->base + 0x3c) /* register used to |
94 | check the status of | |
95 | the abort command */ | |
96 | #define NVIDIA_SMB_CTRL (smbus->base + 0x3e) /* control register */ | |
97 | ||
98 | #define NVIDIA_SMB_STATUS_ABRT_STS 0x01 /* Bit to notify that | |
99 | abort succeeded */ | |
100 | #define NVIDIA_SMB_CTRL_ABORT 0x20 | |
1da177e4 LT |
101 | #define NVIDIA_SMB_STS_DONE 0x80 |
102 | #define NVIDIA_SMB_STS_ALRM 0x40 | |
103 | #define NVIDIA_SMB_STS_RES 0x20 | |
104 | #define NVIDIA_SMB_STS_STATUS 0x1f | |
105 | ||
106 | #define NVIDIA_SMB_PRTCL_WRITE 0x00 | |
107 | #define NVIDIA_SMB_PRTCL_READ 0x01 | |
108 | #define NVIDIA_SMB_PRTCL_QUICK 0x02 | |
109 | #define NVIDIA_SMB_PRTCL_BYTE 0x04 | |
110 | #define NVIDIA_SMB_PRTCL_BYTE_DATA 0x06 | |
111 | #define NVIDIA_SMB_PRTCL_WORD_DATA 0x08 | |
b53c8221 | 112 | #define NVIDIA_SMB_PRTCL_BLOCK_DATA 0x0a |
1da177e4 LT |
113 | #define NVIDIA_SMB_PRTCL_PEC 0x80 |
114 | ||
41535497 OR |
115 | /* Misc definitions */ |
116 | #define MAX_TIMEOUT 100 | |
117 | ||
08851d6e JD |
118 | /* We disable the second SMBus channel on these boards */ |
119 | static struct dmi_system_id __devinitdata nforce2_dmi_blacklist2[] = { | |
120 | { | |
121 | .ident = "DFI Lanparty NF4 Expert", | |
122 | .matches = { | |
123 | DMI_MATCH(DMI_BOARD_VENDOR, "DFI Corp,LTD"), | |
124 | DMI_MATCH(DMI_BOARD_NAME, "LP UT NF4 Expert"), | |
125 | }, | |
126 | }, | |
127 | { } | |
128 | }; | |
129 | ||
d6072f84 | 130 | static struct pci_driver nforce2_driver; |
1da177e4 | 131 | |
279e9024 JD |
132 | /* For multiplexing support, we need a global reference to the 1st |
133 | SMBus channel */ | |
134 | #if defined CONFIG_I2C_NFORCE2_S4985 || defined CONFIG_I2C_NFORCE2_S4985_MODULE | |
135 | struct i2c_adapter *nforce2_smbus; | |
136 | EXPORT_SYMBOL_GPL(nforce2_smbus); | |
137 | ||
138 | static void nforce2_set_reference(struct i2c_adapter *adap) | |
139 | { | |
140 | nforce2_smbus = adap; | |
141 | } | |
142 | #else | |
143 | static inline void nforce2_set_reference(struct i2c_adapter *adap) { } | |
144 | #endif | |
145 | ||
d49584c4 OR |
146 | static void nforce2_abort(struct i2c_adapter *adap) |
147 | { | |
148 | struct nforce2_smbus *smbus = adap->algo_data; | |
149 | int timeout = 0; | |
150 | unsigned char temp; | |
151 | ||
152 | dev_dbg(&adap->dev, "Aborting current transaction\n"); | |
153 | ||
154 | outb_p(NVIDIA_SMB_CTRL_ABORT, NVIDIA_SMB_CTRL); | |
155 | do { | |
156 | msleep(1); | |
157 | temp = inb_p(NVIDIA_SMB_STATUS_ABRT); | |
158 | } while (!(temp & NVIDIA_SMB_STATUS_ABRT_STS) && | |
159 | (timeout++ < MAX_TIMEOUT)); | |
160 | if (!(temp & NVIDIA_SMB_STATUS_ABRT_STS)) | |
161 | dev_err(&adap->dev, "Can't reset the smbus\n"); | |
162 | outb_p(NVIDIA_SMB_STATUS_ABRT_STS, NVIDIA_SMB_STATUS_ABRT); | |
163 | } | |
164 | ||
41535497 OR |
165 | static int nforce2_check_status(struct i2c_adapter *adap) |
166 | { | |
167 | struct nforce2_smbus *smbus = adap->algo_data; | |
168 | int timeout = 0; | |
169 | unsigned char temp; | |
170 | ||
171 | do { | |
172 | msleep(1); | |
173 | temp = inb_p(NVIDIA_SMB_STS); | |
174 | } while ((!temp) && (timeout++ < MAX_TIMEOUT)); | |
175 | ||
4ccc28f7 | 176 | if (timeout > MAX_TIMEOUT) { |
41535497 | 177 | dev_dbg(&adap->dev, "SMBus Timeout!\n"); |
d49584c4 OR |
178 | if (smbus->can_abort) |
179 | nforce2_abort(adap); | |
97140342 | 180 | return -ETIMEDOUT; |
41535497 OR |
181 | } |
182 | if (!(temp & NVIDIA_SMB_STS_DONE) || (temp & NVIDIA_SMB_STS_STATUS)) { | |
183 | dev_dbg(&adap->dev, "Transaction failed (0x%02x)!\n", temp); | |
97140342 | 184 | return -EIO; |
41535497 OR |
185 | } |
186 | return 0; | |
187 | } | |
188 | ||
97140342 | 189 | /* Return negative errno on error */ |
1da177e4 LT |
190 | static s32 nforce2_access(struct i2c_adapter * adap, u16 addr, |
191 | unsigned short flags, char read_write, | |
192 | u8 command, int size, union i2c_smbus_data * data) | |
193 | { | |
194 | struct nforce2_smbus *smbus = adap->algo_data; | |
41535497 | 195 | unsigned char protocol, pec; |
b53c8221 | 196 | u8 len; |
97140342 | 197 | int i, status; |
1da177e4 LT |
198 | |
199 | protocol = (read_write == I2C_SMBUS_READ) ? NVIDIA_SMB_PRTCL_READ : | |
200 | NVIDIA_SMB_PRTCL_WRITE; | |
201 | pec = (flags & I2C_CLIENT_PEC) ? NVIDIA_SMB_PRTCL_PEC : 0; | |
202 | ||
203 | switch (size) { | |
204 | ||
205 | case I2C_SMBUS_QUICK: | |
206 | protocol |= NVIDIA_SMB_PRTCL_QUICK; | |
207 | read_write = I2C_SMBUS_WRITE; | |
208 | break; | |
209 | ||
210 | case I2C_SMBUS_BYTE: | |
211 | if (read_write == I2C_SMBUS_WRITE) | |
212 | outb_p(command, NVIDIA_SMB_CMD); | |
213 | protocol |= NVIDIA_SMB_PRTCL_BYTE; | |
214 | break; | |
215 | ||
216 | case I2C_SMBUS_BYTE_DATA: | |
217 | outb_p(command, NVIDIA_SMB_CMD); | |
218 | if (read_write == I2C_SMBUS_WRITE) | |
219 | outb_p(data->byte, NVIDIA_SMB_DATA); | |
220 | protocol |= NVIDIA_SMB_PRTCL_BYTE_DATA; | |
221 | break; | |
222 | ||
223 | case I2C_SMBUS_WORD_DATA: | |
224 | outb_p(command, NVIDIA_SMB_CMD); | |
225 | if (read_write == I2C_SMBUS_WRITE) { | |
226 | outb_p(data->word, NVIDIA_SMB_DATA); | |
227 | outb_p(data->word >> 8, NVIDIA_SMB_DATA+1); | |
228 | } | |
229 | protocol |= NVIDIA_SMB_PRTCL_WORD_DATA | pec; | |
230 | break; | |
231 | ||
b53c8221 OR |
232 | case I2C_SMBUS_BLOCK_DATA: |
233 | outb_p(command, NVIDIA_SMB_CMD); | |
234 | if (read_write == I2C_SMBUS_WRITE) { | |
235 | len = data->block[0]; | |
236 | if ((len == 0) || (len > I2C_SMBUS_BLOCK_MAX)) { | |
237 | dev_err(&adap->dev, | |
238 | "Transaction failed " | |
239 | "(requested block size: %d)\n", | |
240 | len); | |
97140342 | 241 | return -EINVAL; |
b53c8221 OR |
242 | } |
243 | outb_p(len, NVIDIA_SMB_BCNT); | |
244 | for (i = 0; i < I2C_SMBUS_BLOCK_MAX; i++) | |
245 | outb_p(data->block[i + 1], | |
246 | NVIDIA_SMB_DATA+i); | |
247 | } | |
248 | protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec; | |
249 | break; | |
250 | ||
1da177e4 LT |
251 | default: |
252 | dev_err(&adap->dev, "Unsupported transaction %d\n", size); | |
97140342 | 253 | return -EOPNOTSUPP; |
1da177e4 LT |
254 | } |
255 | ||
256 | outb_p((addr & 0x7f) << 1, NVIDIA_SMB_ADDR); | |
257 | outb_p(protocol, NVIDIA_SMB_PRTCL); | |
258 | ||
97140342 DB |
259 | status = nforce2_check_status(adap); |
260 | if (status) | |
261 | return status; | |
1da177e4 LT |
262 | |
263 | if (read_write == I2C_SMBUS_WRITE) | |
264 | return 0; | |
265 | ||
266 | switch (size) { | |
267 | ||
268 | case I2C_SMBUS_BYTE: | |
269 | case I2C_SMBUS_BYTE_DATA: | |
270 | data->byte = inb_p(NVIDIA_SMB_DATA); | |
271 | break; | |
272 | ||
273 | case I2C_SMBUS_WORD_DATA: | |
1da177e4 LT |
274 | data->word = inb_p(NVIDIA_SMB_DATA) | (inb_p(NVIDIA_SMB_DATA+1) << 8); |
275 | break; | |
b53c8221 OR |
276 | |
277 | case I2C_SMBUS_BLOCK_DATA: | |
278 | len = inb_p(NVIDIA_SMB_BCNT); | |
41535497 OR |
279 | if ((len <= 0) || (len > I2C_SMBUS_BLOCK_MAX)) { |
280 | dev_err(&adap->dev, "Transaction failed " | |
281 | "(received block size: 0x%02x)\n", | |
282 | len); | |
97140342 | 283 | return -EPROTO; |
41535497 | 284 | } |
b53c8221 OR |
285 | for (i = 0; i < len; i++) |
286 | data->block[i+1] = inb_p(NVIDIA_SMB_DATA + i); | |
287 | data->block[0] = len; | |
288 | break; | |
1da177e4 LT |
289 | } |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | ||
295 | static u32 nforce2_func(struct i2c_adapter *adapter) | |
296 | { | |
297 | /* other functionality might be possible, but is not tested */ | |
298 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | | |
b53c8221 | 299 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | |
ac3f5753 | 300 | I2C_FUNC_SMBUS_PEC | |
b53c8221 OR |
301 | (((struct nforce2_smbus*)adapter->algo_data)->blockops ? |
302 | I2C_FUNC_SMBUS_BLOCK_DATA : 0); | |
1da177e4 LT |
303 | } |
304 | ||
ad04d5c3 HFV |
305 | static struct i2c_algorithm smbus_algorithm = { |
306 | .smbus_xfer = nforce2_access, | |
307 | .functionality = nforce2_func, | |
308 | }; | |
309 | ||
1da177e4 LT |
310 | |
311 | static struct pci_device_id nforce2_ids[] = { | |
312 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS) }, | |
313 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SMBUS) }, | |
314 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3_SMBUS) }, | |
315 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SMBUS) }, | |
316 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE4_SMBUS) }, | |
7c72ccf0 | 317 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SMBUS) }, |
5c7ae658 JD |
318 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SMBUS) }, |
319 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS) }, | |
f75803de JD |
320 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SMBUS) }, |
321 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_SMBUS) }, | |
d2dd14ac JD |
322 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_SMBUS) }, |
323 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_SMBUS) }, | |
324 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP78S_SMBUS) }, | |
325 | { PCI_DEVICE(PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP79_SMBUS) }, | |
1da177e4 LT |
326 | { 0 } |
327 | }; | |
328 | ||
1da177e4 LT |
329 | MODULE_DEVICE_TABLE (pci, nforce2_ids); |
330 | ||
331 | ||
5c7ae658 JD |
332 | static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar, |
333 | int alt_reg, struct nforce2_smbus *smbus, const char *name) | |
1da177e4 | 334 | { |
1da177e4 LT |
335 | int error; |
336 | ||
5c7ae658 JD |
337 | smbus->base = pci_resource_start(dev, bar); |
338 | if (smbus->base) { | |
339 | smbus->size = pci_resource_len(dev, bar); | |
340 | } else { | |
341 | /* Older incarnations of the device used non-standard BARs */ | |
342 | u16 iobase; | |
343 | ||
344 | if (pci_read_config_word(dev, alt_reg, &iobase) | |
345 | != PCIBIOS_SUCCESSFUL) { | |
346 | dev_err(&dev->dev, "Error reading PCI config for %s\n", | |
347 | name); | |
97140342 | 348 | return -EIO; |
5c7ae658 JD |
349 | } |
350 | ||
351 | smbus->base = iobase & PCI_BASE_ADDRESS_IO_MASK; | |
ad04d5c3 | 352 | smbus->size = 64; |
1da177e4 | 353 | } |
1da177e4 | 354 | |
54fb4a05 JD |
355 | error = acpi_check_region(smbus->base, smbus->size, |
356 | nforce2_driver.name); | |
357 | if (error) | |
358 | return -1; | |
359 | ||
d6072f84 | 360 | if (!request_region(smbus->base, smbus->size, nforce2_driver.name)) { |
1da177e4 LT |
361 | dev_err(&smbus->adapter.dev, "Error requesting region %02x .. %02X for %s\n", |
362 | smbus->base, smbus->base+smbus->size-1, name); | |
97140342 | 363 | return -EBUSY; |
1da177e4 | 364 | } |
ad04d5c3 | 365 | smbus->adapter.owner = THIS_MODULE; |
3401b2ff | 366 | smbus->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD; |
ad04d5c3 | 367 | smbus->adapter.algo = &smbus_algorithm; |
1da177e4 LT |
368 | smbus->adapter.algo_data = smbus; |
369 | smbus->adapter.dev.parent = &dev->dev; | |
2096b956 | 370 | snprintf(smbus->adapter.name, sizeof(smbus->adapter.name), |
1da177e4 LT |
371 | "SMBus nForce2 adapter at %04x", smbus->base); |
372 | ||
373 | error = i2c_add_adapter(&smbus->adapter); | |
374 | if (error) { | |
375 | dev_err(&smbus->adapter.dev, "Failed to register adapter.\n"); | |
376 | release_region(smbus->base, smbus->size); | |
97140342 | 377 | return error; |
1da177e4 LT |
378 | } |
379 | dev_info(&smbus->adapter.dev, "nForce2 SMBus adapter at %#x\n", smbus->base); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | ||
384 | static int __devinit nforce2_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
385 | { | |
386 | struct nforce2_smbus *smbuses; | |
387 | int res1, res2; | |
388 | ||
389 | /* we support 2 SMBus adapters */ | |
078d9fe4 | 390 | if (!(smbuses = kzalloc(2*sizeof(struct nforce2_smbus), GFP_KERNEL))) |
1da177e4 | 391 | return -ENOMEM; |
1da177e4 LT |
392 | pci_set_drvdata(dev, smbuses); |
393 | ||
b53c8221 | 394 | switch(dev->device) { |
541b6a7a | 395 | case PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS: |
b53c8221 OR |
396 | case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SMBUS: |
397 | case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS: | |
398 | smbuses[0].blockops = 1; | |
399 | smbuses[1].blockops = 1; | |
d49584c4 OR |
400 | smbuses[0].can_abort = 1; |
401 | smbuses[1].can_abort = 1; | |
b53c8221 OR |
402 | } |
403 | ||
1da177e4 | 404 | /* SMBus adapter 1 */ |
5c7ae658 | 405 | res1 = nforce2_probe_smb(dev, 4, NFORCE_PCI_SMB1, &smbuses[0], "SMB1"); |
1da177e4 LT |
406 | if (res1 < 0) { |
407 | dev_err(&dev->dev, "Error probing SMB1.\n"); | |
408 | smbuses[0].base = 0; /* to have a check value */ | |
409 | } | |
5c7ae658 | 410 | /* SMBus adapter 2 */ |
08851d6e JD |
411 | if (dmi_check_system(nforce2_dmi_blacklist2)) { |
412 | dev_err(&dev->dev, "Disabling SMB2 for safety reasons.\n"); | |
413 | res2 = -EPERM; | |
414 | smbuses[1].base = 0; | |
415 | } else { | |
416 | res2 = nforce2_probe_smb(dev, 5, NFORCE_PCI_SMB2, &smbuses[1], | |
417 | "SMB2"); | |
418 | if (res2 < 0) { | |
419 | dev_err(&dev->dev, "Error probing SMB2.\n"); | |
420 | smbuses[1].base = 0; /* to have a check value */ | |
421 | } | |
1da177e4 LT |
422 | } |
423 | if ((res1 < 0) && (res2 < 0)) { | |
424 | /* we did not find even one of the SMBuses, so we give up */ | |
425 | kfree(smbuses); | |
426 | return -ENODEV; | |
427 | } | |
428 | ||
279e9024 | 429 | nforce2_set_reference(&smbuses[0].adapter); |
1da177e4 LT |
430 | return 0; |
431 | } | |
432 | ||
433 | ||
434 | static void __devexit nforce2_remove(struct pci_dev *dev) | |
435 | { | |
436 | struct nforce2_smbus *smbuses = (void*) pci_get_drvdata(dev); | |
437 | ||
279e9024 | 438 | nforce2_set_reference(NULL); |
1da177e4 LT |
439 | if (smbuses[0].base) { |
440 | i2c_del_adapter(&smbuses[0].adapter); | |
441 | release_region(smbuses[0].base, smbuses[0].size); | |
442 | } | |
443 | if (smbuses[1].base) { | |
444 | i2c_del_adapter(&smbuses[1].adapter); | |
445 | release_region(smbuses[1].base, smbuses[1].size); | |
446 | } | |
447 | kfree(smbuses); | |
448 | } | |
449 | ||
450 | static struct pci_driver nforce2_driver = { | |
451 | .name = "nForce2_smbus", | |
452 | .id_table = nforce2_ids, | |
453 | .probe = nforce2_probe, | |
454 | .remove = __devexit_p(nforce2_remove), | |
455 | }; | |
456 | ||
457 | static int __init nforce2_init(void) | |
458 | { | |
459 | return pci_register_driver(&nforce2_driver); | |
460 | } | |
461 | ||
462 | static void __exit nforce2_exit(void) | |
463 | { | |
464 | pci_unregister_driver(&nforce2_driver); | |
465 | } | |
466 | ||
467 | module_init(nforce2_init); | |
468 | module_exit(nforce2_exit); | |
469 |