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1da177e4 LT |
1 | /* |
2 | i2c-ali1535.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | monitoring | |
4 | Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>, | |
5 | Philip Edelbrock <phil@netroedge.com>, | |
6 | Mark D. Studebaker <mdsxyz123@yahoo.com>, | |
7 | Dan Eaton <dan.eaton@rocketlogix.com> and | |
8 | Stephen Rousset<stephen.rousset@rocketlogix.com> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | */ | |
24 | ||
25 | /* | |
26 | This is the driver for the SMB Host controller on | |
27 | Acer Labs Inc. (ALI) M1535 South Bridge. | |
28 | ||
29 | The M1535 is a South bridge for portable systems. | |
30 | It is very similar to the M15x3 South bridges also produced | |
31 | by Acer Labs Inc. Some of the registers within the part | |
32 | have moved and some have been redefined slightly. Additionally, | |
33 | the sequencing of the SMBus transactions has been modified | |
34 | to be more consistent with the sequencing recommended by | |
35 | the manufacturer and observed through testing. These | |
36 | changes are reflected in this driver and can be identified | |
37 | by comparing this driver to the i2c-ali15x3 driver. | |
38 | For an overview of these chips see http://www.acerlabs.com | |
39 | ||
40 | The SMB controller is part of the 7101 device, which is an | |
41 | ACPI-compliant Power Management Unit (PMU). | |
42 | ||
43 | The whole 7101 device has to be enabled for the SMB to work. | |
44 | You can't just enable the SMB alone. | |
45 | The SMB and the ACPI have separate I/O spaces. | |
46 | We make sure that the SMB is enabled. We leave the ACPI alone. | |
47 | ||
48 | This driver controls the SMB Host only. | |
49 | ||
50 | This driver does not use interrupts. | |
51 | */ | |
52 | ||
53 | ||
54 | /* Note: we assume there can only be one ALI1535, with one SMBus interface */ | |
55 | ||
1da177e4 LT |
56 | #include <linux/module.h> |
57 | #include <linux/pci.h> | |
58 | #include <linux/kernel.h> | |
59 | #include <linux/stddef.h> | |
60 | #include <linux/sched.h> | |
61 | #include <linux/delay.h> | |
62 | #include <linux/ioport.h> | |
63 | #include <linux/i2c.h> | |
64 | #include <linux/init.h> | |
65 | #include <asm/io.h> | |
66 | #include <asm/semaphore.h> | |
67 | ||
68 | ||
69 | /* ALI1535 SMBus address offsets */ | |
70 | #define SMBHSTSTS (0 + ali1535_smba) | |
71 | #define SMBHSTTYP (1 + ali1535_smba) | |
72 | #define SMBHSTPORT (2 + ali1535_smba) | |
73 | #define SMBHSTCMD (7 + ali1535_smba) | |
74 | #define SMBHSTADD (3 + ali1535_smba) | |
75 | #define SMBHSTDAT0 (4 + ali1535_smba) | |
76 | #define SMBHSTDAT1 (5 + ali1535_smba) | |
77 | #define SMBBLKDAT (6 + ali1535_smba) | |
78 | ||
79 | /* PCI Address Constants */ | |
80 | #define SMBCOM 0x004 | |
81 | #define SMBREV 0x008 | |
82 | #define SMBCFG 0x0D1 | |
83 | #define SMBBA 0x0E2 | |
84 | #define SMBHSTCFG 0x0F0 | |
85 | #define SMBCLK 0x0F2 | |
86 | ||
87 | /* Other settings */ | |
88 | #define MAX_TIMEOUT 500 /* times 1/100 sec */ | |
89 | #define ALI1535_SMB_IOSIZE 32 | |
90 | ||
91 | #define ALI1535_SMB_DEFAULTBASE 0x8040 | |
92 | ||
93 | /* ALI1535 address lock bits */ | |
94 | #define ALI1535_LOCK 0x06 /* dwe */ | |
95 | ||
96 | /* ALI1535 command constants */ | |
97 | #define ALI1535_QUICK 0x00 | |
98 | #define ALI1535_BYTE 0x10 | |
99 | #define ALI1535_BYTE_DATA 0x20 | |
100 | #define ALI1535_WORD_DATA 0x30 | |
101 | #define ALI1535_BLOCK_DATA 0x40 | |
102 | #define ALI1535_I2C_READ 0x60 | |
103 | ||
104 | #define ALI1535_DEV10B_EN 0x80 /* Enable 10-bit addressing in */ | |
105 | /* I2C read */ | |
106 | #define ALI1535_T_OUT 0x08 /* Time-out Command (write) */ | |
107 | #define ALI1535_A_HIGH_BIT9 0x08 /* Bit 9 of 10-bit address in */ | |
108 | /* Alert-Response-Address */ | |
109 | /* (read) */ | |
110 | #define ALI1535_KILL 0x04 /* Kill Command (write) */ | |
111 | #define ALI1535_A_HIGH_BIT8 0x04 /* Bit 8 of 10-bit address in */ | |
112 | /* Alert-Response-Address */ | |
113 | /* (read) */ | |
114 | ||
115 | #define ALI1535_D_HI_MASK 0x03 /* Mask for isolating bits 9-8 */ | |
116 | /* of 10-bit address in I2C */ | |
117 | /* Read Command */ | |
118 | ||
119 | /* ALI1535 status register bits */ | |
120 | #define ALI1535_STS_IDLE 0x04 | |
121 | #define ALI1535_STS_BUSY 0x08 /* host busy */ | |
122 | #define ALI1535_STS_DONE 0x10 /* transaction complete */ | |
123 | #define ALI1535_STS_DEV 0x20 /* device error */ | |
124 | #define ALI1535_STS_BUSERR 0x40 /* bus error */ | |
125 | #define ALI1535_STS_FAIL 0x80 /* failed bus transaction */ | |
126 | #define ALI1535_STS_ERR 0xE0 /* all the bad error bits */ | |
127 | ||
128 | #define ALI1535_BLOCK_CLR 0x04 /* reset block data index */ | |
129 | ||
130 | /* ALI1535 device address register bits */ | |
131 | #define ALI1535_RD_ADDR 0x01 /* Read/Write Bit in Device */ | |
132 | /* Address field */ | |
133 | /* -> Write = 0 */ | |
134 | /* -> Read = 1 */ | |
135 | #define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */ | |
136 | ||
d6072f84 | 137 | static struct pci_driver ali1535_driver; |
1da177e4 LT |
138 | static unsigned short ali1535_smba; |
139 | static DECLARE_MUTEX(i2c_ali1535_sem); | |
140 | ||
141 | /* Detect whether a ALI1535 can be found, and initialize it, where necessary. | |
142 | Note the differences between kernels with the old PCI BIOS interface and | |
143 | newer kernels with the real PCI interface. In compat.h some things are | |
144 | defined to make the transition easier. */ | |
145 | static int ali1535_setup(struct pci_dev *dev) | |
146 | { | |
147 | int retval = -ENODEV; | |
148 | unsigned char temp; | |
149 | ||
150 | /* Check the following things: | |
151 | - SMB I/O address is initialized | |
152 | - Device is enabled | |
153 | - We can use the addresses | |
154 | */ | |
155 | ||
156 | /* Determine the address of the SMBus area */ | |
157 | pci_read_config_word(dev, SMBBA, &ali1535_smba); | |
158 | ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); | |
159 | if (ali1535_smba == 0) { | |
160 | dev_warn(&dev->dev, | |
161 | "ALI1535_smb region uninitialized - upgrade BIOS?\n"); | |
162 | goto exit; | |
163 | } | |
164 | ||
d6072f84 JD |
165 | if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE, |
166 | ali1535_driver.name)) { | |
1da177e4 LT |
167 | dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n", |
168 | ali1535_smba); | |
169 | goto exit; | |
170 | } | |
171 | ||
172 | /* check if whole device is enabled */ | |
173 | pci_read_config_byte(dev, SMBCFG, &temp); | |
174 | if ((temp & ALI1535_SMBIO_EN) == 0) { | |
175 | dev_err(&dev->dev, "SMB device not enabled - upgrade BIOS?\n"); | |
176 | goto exit_free; | |
177 | } | |
178 | ||
179 | /* Is SMB Host controller enabled? */ | |
180 | pci_read_config_byte(dev, SMBHSTCFG, &temp); | |
181 | if ((temp & 1) == 0) { | |
182 | dev_err(&dev->dev, "SMBus controller not enabled - upgrade BIOS?\n"); | |
183 | goto exit_free; | |
184 | } | |
185 | ||
186 | /* set SMB clock to 74KHz as recommended in data sheet */ | |
187 | pci_write_config_byte(dev, SMBCLK, 0x20); | |
188 | ||
189 | /* | |
190 | The interrupt routing for SMB is set up in register 0x77 in the | |
191 | 1533 ISA Bridge device, NOT in the 7101 device. | |
192 | Don't bother with finding the 1533 device and reading the register. | |
193 | if ((....... & 0x0F) == 1) | |
194 | dev_dbg(&dev->dev, "ALI1535 using Interrupt 9 for SMBus.\n"); | |
195 | */ | |
196 | pci_read_config_byte(dev, SMBREV, &temp); | |
197 | dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp); | |
198 | dev_dbg(&dev->dev, "ALI1535_smba = 0x%X\n", ali1535_smba); | |
199 | ||
200 | retval = 0; | |
201 | exit: | |
202 | return retval; | |
203 | ||
204 | exit_free: | |
205 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); | |
206 | return retval; | |
207 | } | |
208 | ||
209 | static int ali1535_transaction(struct i2c_adapter *adap) | |
210 | { | |
211 | int temp; | |
212 | int result = 0; | |
213 | int timeout = 0; | |
214 | ||
215 | dev_dbg(&adap->dev, "Transaction (pre): STS=%02x, TYP=%02x, " | |
216 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", | |
217 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), | |
218 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); | |
219 | ||
220 | /* get status */ | |
221 | temp = inb_p(SMBHSTSTS); | |
222 | ||
223 | /* Make sure the SMBus host is ready to start transmitting */ | |
224 | /* Check the busy bit first */ | |
225 | if (temp & ALI1535_STS_BUSY) { | |
226 | /* If the host controller is still busy, it may have timed out | |
227 | * in the previous transaction, resulting in a "SMBus Timeout" | |
228 | * printk. I've tried the following to reset a stuck busy bit. | |
229 | * 1. Reset the controller with an KILL command. (this | |
230 | * doesn't seem to clear the controller if an external | |
231 | * device is hung) | |
232 | * 2. Reset the controller and the other SMBus devices with a | |
233 | * T_OUT command. (this clears the host busy bit if an | |
234 | * external device is hung, but it comes back upon a new | |
235 | * access to a device) | |
236 | * 3. Disable and reenable the controller in SMBHSTCFG. Worst | |
237 | * case, nothing seems to work except power reset. | |
238 | */ | |
239 | ||
240 | /* Try resetting entire SMB bus, including other devices - This | |
241 | * may not work either - it clears the BUSY bit but then the | |
242 | * BUSY bit may come back on when you try and use the chip | |
243 | * again. If that's the case you are stuck. | |
244 | */ | |
245 | dev_info(&adap->dev, | |
246 | "Resetting entire SMB Bus to clear busy condition (%02x)\n", | |
247 | temp); | |
248 | outb_p(ALI1535_T_OUT, SMBHSTTYP); | |
249 | temp = inb_p(SMBHSTSTS); | |
250 | } | |
251 | ||
252 | /* now check the error bits and the busy bit */ | |
253 | if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { | |
254 | /* do a clear-on-write */ | |
255 | outb_p(0xFF, SMBHSTSTS); | |
256 | if ((temp = inb_p(SMBHSTSTS)) & | |
257 | (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { | |
258 | /* This is probably going to be correctable only by a | |
259 | * power reset as one of the bits now appears to be | |
260 | * stuck */ | |
261 | /* This may be a bus or device with electrical problems. */ | |
262 | dev_err(&adap->dev, | |
263 | "SMBus reset failed! (0x%02x) - controller or " | |
264 | "device on bus is probably hung\n", temp); | |
265 | return -1; | |
266 | } | |
267 | } else { | |
268 | /* check and clear done bit */ | |
269 | if (temp & ALI1535_STS_DONE) { | |
270 | outb_p(temp, SMBHSTSTS); | |
271 | } | |
272 | } | |
273 | ||
274 | /* start the transaction by writing anything to the start register */ | |
275 | outb_p(0xFF, SMBHSTPORT); | |
276 | ||
277 | /* We will always wait for a fraction of a second! */ | |
278 | timeout = 0; | |
279 | do { | |
280 | msleep(1); | |
281 | temp = inb_p(SMBHSTSTS); | |
282 | } while (((temp & ALI1535_STS_BUSY) && !(temp & ALI1535_STS_IDLE)) | |
283 | && (timeout++ < MAX_TIMEOUT)); | |
284 | ||
285 | /* If the SMBus is still busy, we give up */ | |
286 | if (timeout >= MAX_TIMEOUT) { | |
287 | result = -1; | |
288 | dev_err(&adap->dev, "SMBus Timeout!\n"); | |
289 | } | |
290 | ||
291 | if (temp & ALI1535_STS_FAIL) { | |
292 | result = -1; | |
293 | dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); | |
294 | } | |
295 | ||
296 | /* Unfortunately the ALI SMB controller maps "no response" and "bus | |
297 | * collision" into a single bit. No reponse is the usual case so don't | |
298 | * do a printk. This means that bus collisions go unreported. | |
299 | */ | |
300 | if (temp & ALI1535_STS_BUSERR) { | |
301 | result = -1; | |
302 | dev_dbg(&adap->dev, | |
303 | "Error: no response or bus collision ADD=%02x\n", | |
304 | inb_p(SMBHSTADD)); | |
305 | } | |
306 | ||
307 | /* haven't ever seen this */ | |
308 | if (temp & ALI1535_STS_DEV) { | |
309 | result = -1; | |
310 | dev_err(&adap->dev, "Error: device error\n"); | |
311 | } | |
312 | ||
313 | /* check to see if the "command complete" indication is set */ | |
314 | if (!(temp & ALI1535_STS_DONE)) { | |
315 | result = -1; | |
316 | dev_err(&adap->dev, "Error: command never completed\n"); | |
317 | } | |
318 | ||
319 | dev_dbg(&adap->dev, "Transaction (post): STS=%02x, TYP=%02x, " | |
320 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", | |
321 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), | |
322 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); | |
323 | ||
324 | /* take consequent actions for error conditions */ | |
325 | if (!(temp & ALI1535_STS_DONE)) { | |
326 | /* issue "kill" to reset host controller */ | |
327 | outb_p(ALI1535_KILL,SMBHSTTYP); | |
328 | outb_p(0xFF,SMBHSTSTS); | |
329 | } else if (temp & ALI1535_STS_ERR) { | |
330 | /* issue "timeout" to reset all devices on bus */ | |
331 | outb_p(ALI1535_T_OUT,SMBHSTTYP); | |
332 | outb_p(0xFF,SMBHSTSTS); | |
333 | } | |
334 | ||
335 | return result; | |
336 | } | |
337 | ||
338 | /* Return -1 on error. */ | |
339 | static s32 ali1535_access(struct i2c_adapter *adap, u16 addr, | |
340 | unsigned short flags, char read_write, u8 command, | |
341 | int size, union i2c_smbus_data *data) | |
342 | { | |
343 | int i, len; | |
344 | int temp; | |
345 | int timeout; | |
346 | s32 result = 0; | |
347 | ||
348 | down(&i2c_ali1535_sem); | |
349 | /* make sure SMBus is idle */ | |
350 | temp = inb_p(SMBHSTSTS); | |
351 | for (timeout = 0; | |
352 | (timeout < MAX_TIMEOUT) && !(temp & ALI1535_STS_IDLE); | |
353 | timeout++) { | |
354 | msleep(1); | |
355 | temp = inb_p(SMBHSTSTS); | |
356 | } | |
357 | if (timeout >= MAX_TIMEOUT) | |
358 | dev_warn(&adap->dev, "Idle wait Timeout! STS=0x%02x\n", temp); | |
359 | ||
360 | /* clear status register (clear-on-write) */ | |
361 | outb_p(0xFF, SMBHSTSTS); | |
362 | ||
363 | switch (size) { | |
364 | case I2C_SMBUS_PROC_CALL: | |
365 | dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n"); | |
366 | result = -1; | |
367 | goto EXIT; | |
368 | case I2C_SMBUS_QUICK: | |
369 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
370 | SMBHSTADD); | |
371 | size = ALI1535_QUICK; | |
372 | outb_p(size, SMBHSTTYP); /* output command */ | |
373 | break; | |
374 | case I2C_SMBUS_BYTE: | |
375 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
376 | SMBHSTADD); | |
377 | size = ALI1535_BYTE; | |
378 | outb_p(size, SMBHSTTYP); /* output command */ | |
379 | if (read_write == I2C_SMBUS_WRITE) | |
380 | outb_p(command, SMBHSTCMD); | |
381 | break; | |
382 | case I2C_SMBUS_BYTE_DATA: | |
383 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
384 | SMBHSTADD); | |
385 | size = ALI1535_BYTE_DATA; | |
386 | outb_p(size, SMBHSTTYP); /* output command */ | |
387 | outb_p(command, SMBHSTCMD); | |
388 | if (read_write == I2C_SMBUS_WRITE) | |
389 | outb_p(data->byte, SMBHSTDAT0); | |
390 | break; | |
391 | case I2C_SMBUS_WORD_DATA: | |
392 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
393 | SMBHSTADD); | |
394 | size = ALI1535_WORD_DATA; | |
395 | outb_p(size, SMBHSTTYP); /* output command */ | |
396 | outb_p(command, SMBHSTCMD); | |
397 | if (read_write == I2C_SMBUS_WRITE) { | |
398 | outb_p(data->word & 0xff, SMBHSTDAT0); | |
399 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); | |
400 | } | |
401 | break; | |
402 | case I2C_SMBUS_BLOCK_DATA: | |
403 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
404 | SMBHSTADD); | |
405 | size = ALI1535_BLOCK_DATA; | |
406 | outb_p(size, SMBHSTTYP); /* output command */ | |
407 | outb_p(command, SMBHSTCMD); | |
408 | if (read_write == I2C_SMBUS_WRITE) { | |
409 | len = data->block[0]; | |
410 | if (len < 0) { | |
411 | len = 0; | |
412 | data->block[0] = len; | |
413 | } | |
414 | if (len > 32) { | |
415 | len = 32; | |
416 | data->block[0] = len; | |
417 | } | |
418 | outb_p(len, SMBHSTDAT0); | |
419 | /* Reset SMBBLKDAT */ | |
420 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); | |
421 | for (i = 1; i <= len; i++) | |
422 | outb_p(data->block[i], SMBBLKDAT); | |
423 | } | |
424 | break; | |
425 | } | |
426 | ||
427 | if (ali1535_transaction(adap)) { | |
428 | /* Error in transaction */ | |
429 | result = -1; | |
430 | goto EXIT; | |
431 | } | |
432 | ||
433 | if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) { | |
434 | result = 0; | |
435 | goto EXIT; | |
436 | } | |
437 | ||
438 | switch (size) { | |
439 | case ALI1535_BYTE: /* Result put in SMBHSTDAT0 */ | |
440 | data->byte = inb_p(SMBHSTDAT0); | |
441 | break; | |
442 | case ALI1535_BYTE_DATA: | |
443 | data->byte = inb_p(SMBHSTDAT0); | |
444 | break; | |
445 | case ALI1535_WORD_DATA: | |
446 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); | |
447 | break; | |
448 | case ALI1535_BLOCK_DATA: | |
449 | len = inb_p(SMBHSTDAT0); | |
450 | if (len > 32) | |
451 | len = 32; | |
452 | data->block[0] = len; | |
453 | /* Reset SMBBLKDAT */ | |
454 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); | |
455 | for (i = 1; i <= data->block[0]; i++) { | |
456 | data->block[i] = inb_p(SMBBLKDAT); | |
457 | dev_dbg(&adap->dev, "Blk: len=%d, i=%d, data=%02x\n", | |
458 | len, i, data->block[i]); | |
459 | } | |
460 | break; | |
461 | } | |
462 | EXIT: | |
463 | up(&i2c_ali1535_sem); | |
464 | return result; | |
465 | } | |
466 | ||
467 | ||
468 | static u32 ali1535_func(struct i2c_adapter *adapter) | |
469 | { | |
470 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | | |
471 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | | |
472 | I2C_FUNC_SMBUS_BLOCK_DATA; | |
473 | } | |
474 | ||
475 | static struct i2c_algorithm smbus_algorithm = { | |
1da177e4 LT |
476 | .smbus_xfer = ali1535_access, |
477 | .functionality = ali1535_func, | |
478 | }; | |
479 | ||
480 | static struct i2c_adapter ali1535_adapter = { | |
481 | .owner = THIS_MODULE, | |
482 | .class = I2C_CLASS_HWMON, | |
483 | .algo = &smbus_algorithm, | |
1da177e4 LT |
484 | }; |
485 | ||
486 | static struct pci_device_id ali1535_ids[] = { | |
487 | { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101) }, | |
488 | { }, | |
489 | }; | |
490 | ||
491 | MODULE_DEVICE_TABLE (pci, ali1535_ids); | |
492 | ||
493 | static int __devinit ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
494 | { | |
495 | if (ali1535_setup(dev)) { | |
496 | dev_warn(&dev->dev, | |
497 | "ALI1535 not detected, module not inserted.\n"); | |
498 | return -ENODEV; | |
499 | } | |
500 | ||
501 | /* set up the driverfs linkage to our parent device */ | |
502 | ali1535_adapter.dev.parent = &dev->dev; | |
503 | ||
504 | snprintf(ali1535_adapter.name, I2C_NAME_SIZE, | |
505 | "SMBus ALI1535 adapter at %04x", ali1535_smba); | |
506 | return i2c_add_adapter(&ali1535_adapter); | |
507 | } | |
508 | ||
509 | static void __devexit ali1535_remove(struct pci_dev *dev) | |
510 | { | |
511 | i2c_del_adapter(&ali1535_adapter); | |
512 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); | |
513 | } | |
514 | ||
515 | static struct pci_driver ali1535_driver = { | |
ccd7aa0c | 516 | .owner = THIS_MODULE, |
1da177e4 LT |
517 | .name = "ali1535_smbus", |
518 | .id_table = ali1535_ids, | |
519 | .probe = ali1535_probe, | |
520 | .remove = __devexit_p(ali1535_remove), | |
521 | }; | |
522 | ||
523 | static int __init i2c_ali1535_init(void) | |
524 | { | |
525 | return pci_register_driver(&ali1535_driver); | |
526 | } | |
527 | ||
528 | static void __exit i2c_ali1535_exit(void) | |
529 | { | |
530 | pci_unregister_driver(&ali1535_driver); | |
531 | } | |
532 | ||
533 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " | |
534 | "Philip Edelbrock <phil@netroedge.com>, " | |
535 | "Mark D. Studebaker <mdsxyz123@yahoo.com> " | |
536 | "and Dan Eaton <dan.eaton@rocketlogix.com>"); | |
537 | MODULE_DESCRIPTION("ALI1535 SMBus driver"); | |
538 | MODULE_LICENSE("GPL"); | |
539 | ||
540 | module_init(i2c_ali1535_init); | |
541 | module_exit(i2c_ali1535_exit); |