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1da177e4 | 1 | /* |
3fea5df4 LC |
2 | * Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>, |
3 | * Philip Edelbrock <phil@netroedge.com>, | |
4 | * Mark D. Studebaker <mdsxyz123@yahoo.com>, | |
5 | * Dan Eaton <dan.eaton@rocketlogix.com> and | |
6 | * Stephen Rousset <stephen.rousset@rocketlogix.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
1da177e4 LT |
17 | */ |
18 | ||
19 | /* | |
20 | This is the driver for the SMB Host controller on | |
21 | Acer Labs Inc. (ALI) M1535 South Bridge. | |
22 | ||
23 | The M1535 is a South bridge for portable systems. | |
24 | It is very similar to the M15x3 South bridges also produced | |
25 | by Acer Labs Inc. Some of the registers within the part | |
26 | have moved and some have been redefined slightly. Additionally, | |
27 | the sequencing of the SMBus transactions has been modified | |
28 | to be more consistent with the sequencing recommended by | |
29 | the manufacturer and observed through testing. These | |
30 | changes are reflected in this driver and can be identified | |
31 | by comparing this driver to the i2c-ali15x3 driver. | |
32 | For an overview of these chips see http://www.acerlabs.com | |
33 | ||
34 | The SMB controller is part of the 7101 device, which is an | |
35 | ACPI-compliant Power Management Unit (PMU). | |
36 | ||
37 | The whole 7101 device has to be enabled for the SMB to work. | |
38 | You can't just enable the SMB alone. | |
39 | The SMB and the ACPI have separate I/O spaces. | |
40 | We make sure that the SMB is enabled. We leave the ACPI alone. | |
41 | ||
42 | This driver controls the SMB Host only. | |
43 | ||
44 | This driver does not use interrupts. | |
45 | */ | |
46 | ||
47 | ||
48 | /* Note: we assume there can only be one ALI1535, with one SMBus interface */ | |
49 | ||
1da177e4 LT |
50 | #include <linux/module.h> |
51 | #include <linux/pci.h> | |
52 | #include <linux/kernel.h> | |
53 | #include <linux/stddef.h> | |
1da177e4 LT |
54 | #include <linux/delay.h> |
55 | #include <linux/ioport.h> | |
56 | #include <linux/i2c.h> | |
54fb4a05 | 57 | #include <linux/acpi.h> |
21782180 | 58 | #include <linux/io.h> |
1da177e4 LT |
59 | |
60 | ||
61 | /* ALI1535 SMBus address offsets */ | |
62 | #define SMBHSTSTS (0 + ali1535_smba) | |
63 | #define SMBHSTTYP (1 + ali1535_smba) | |
64 | #define SMBHSTPORT (2 + ali1535_smba) | |
65 | #define SMBHSTCMD (7 + ali1535_smba) | |
66 | #define SMBHSTADD (3 + ali1535_smba) | |
67 | #define SMBHSTDAT0 (4 + ali1535_smba) | |
68 | #define SMBHSTDAT1 (5 + ali1535_smba) | |
69 | #define SMBBLKDAT (6 + ali1535_smba) | |
70 | ||
71 | /* PCI Address Constants */ | |
72 | #define SMBCOM 0x004 | |
73 | #define SMBREV 0x008 | |
74 | #define SMBCFG 0x0D1 | |
75 | #define SMBBA 0x0E2 | |
76 | #define SMBHSTCFG 0x0F0 | |
77 | #define SMBCLK 0x0F2 | |
78 | ||
79 | /* Other settings */ | |
80 | #define MAX_TIMEOUT 500 /* times 1/100 sec */ | |
81 | #define ALI1535_SMB_IOSIZE 32 | |
82 | ||
83 | #define ALI1535_SMB_DEFAULTBASE 0x8040 | |
84 | ||
85 | /* ALI1535 address lock bits */ | |
86 | #define ALI1535_LOCK 0x06 /* dwe */ | |
87 | ||
88 | /* ALI1535 command constants */ | |
89 | #define ALI1535_QUICK 0x00 | |
90 | #define ALI1535_BYTE 0x10 | |
91 | #define ALI1535_BYTE_DATA 0x20 | |
92 | #define ALI1535_WORD_DATA 0x30 | |
93 | #define ALI1535_BLOCK_DATA 0x40 | |
94 | #define ALI1535_I2C_READ 0x60 | |
95 | ||
96 | #define ALI1535_DEV10B_EN 0x80 /* Enable 10-bit addressing in */ | |
97 | /* I2C read */ | |
98 | #define ALI1535_T_OUT 0x08 /* Time-out Command (write) */ | |
99 | #define ALI1535_A_HIGH_BIT9 0x08 /* Bit 9 of 10-bit address in */ | |
100 | /* Alert-Response-Address */ | |
101 | /* (read) */ | |
102 | #define ALI1535_KILL 0x04 /* Kill Command (write) */ | |
103 | #define ALI1535_A_HIGH_BIT8 0x04 /* Bit 8 of 10-bit address in */ | |
104 | /* Alert-Response-Address */ | |
105 | /* (read) */ | |
106 | ||
107 | #define ALI1535_D_HI_MASK 0x03 /* Mask for isolating bits 9-8 */ | |
108 | /* of 10-bit address in I2C */ | |
109 | /* Read Command */ | |
110 | ||
111 | /* ALI1535 status register bits */ | |
112 | #define ALI1535_STS_IDLE 0x04 | |
113 | #define ALI1535_STS_BUSY 0x08 /* host busy */ | |
114 | #define ALI1535_STS_DONE 0x10 /* transaction complete */ | |
115 | #define ALI1535_STS_DEV 0x20 /* device error */ | |
116 | #define ALI1535_STS_BUSERR 0x40 /* bus error */ | |
117 | #define ALI1535_STS_FAIL 0x80 /* failed bus transaction */ | |
118 | #define ALI1535_STS_ERR 0xE0 /* all the bad error bits */ | |
119 | ||
120 | #define ALI1535_BLOCK_CLR 0x04 /* reset block data index */ | |
121 | ||
122 | /* ALI1535 device address register bits */ | |
123 | #define ALI1535_RD_ADDR 0x01 /* Read/Write Bit in Device */ | |
124 | /* Address field */ | |
125 | /* -> Write = 0 */ | |
126 | /* -> Read = 1 */ | |
127 | #define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */ | |
128 | ||
d6072f84 | 129 | static struct pci_driver ali1535_driver; |
65a2d74b | 130 | static unsigned long ali1535_smba; |
131 | static unsigned short ali1535_offset; | |
1da177e4 LT |
132 | |
133 | /* Detect whether a ALI1535 can be found, and initialize it, where necessary. | |
134 | Note the differences between kernels with the old PCI BIOS interface and | |
135 | newer kernels with the real PCI interface. In compat.h some things are | |
136 | defined to make the transition easier. */ | |
0b255e92 | 137 | static int ali1535_setup(struct pci_dev *dev) |
1da177e4 | 138 | { |
7c1f59c9 | 139 | int retval; |
1da177e4 LT |
140 | unsigned char temp; |
141 | ||
142 | /* Check the following things: | |
143 | - SMB I/O address is initialized | |
144 | - Device is enabled | |
145 | - We can use the addresses | |
146 | */ | |
147 | ||
65a2d74b | 148 | retval = pci_enable_device(dev); |
149 | if (retval) { | |
150 | dev_err(&dev->dev, "ALI1535_smb can't enable device\n"); | |
151 | goto exit; | |
152 | } | |
153 | ||
1da177e4 | 154 | /* Determine the address of the SMBus area */ |
65a2d74b | 155 | pci_read_config_word(dev, SMBBA, &ali1535_offset); |
156 | dev_dbg(&dev->dev, "ALI1535_smb is at offset 0x%04x\n", ali1535_offset); | |
157 | ali1535_offset &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); | |
158 | if (ali1535_offset == 0) { | |
1da177e4 LT |
159 | dev_warn(&dev->dev, |
160 | "ALI1535_smb region uninitialized - upgrade BIOS?\n"); | |
7c1f59c9 | 161 | retval = -ENODEV; |
1da177e4 LT |
162 | goto exit; |
163 | } | |
164 | ||
65a2d74b | 165 | if (pci_resource_flags(dev, 0) & IORESOURCE_IO) |
166 | ali1535_smba = pci_resource_start(dev, 0) + ali1535_offset; | |
167 | else | |
168 | ali1535_smba = ali1535_offset; | |
169 | ||
54fb4a05 JD |
170 | retval = acpi_check_region(ali1535_smba, ALI1535_SMB_IOSIZE, |
171 | ali1535_driver.name); | |
172 | if (retval) | |
173 | goto exit; | |
174 | ||
d6072f84 JD |
175 | if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE, |
176 | ali1535_driver.name)) { | |
65a2d74b | 177 | dev_err(&dev->dev, "ALI1535_smb region 0x%lx already in use!\n", |
1da177e4 | 178 | ali1535_smba); |
7c1f59c9 | 179 | retval = -EBUSY; |
1da177e4 LT |
180 | goto exit; |
181 | } | |
182 | ||
183 | /* check if whole device is enabled */ | |
184 | pci_read_config_byte(dev, SMBCFG, &temp); | |
185 | if ((temp & ALI1535_SMBIO_EN) == 0) { | |
186 | dev_err(&dev->dev, "SMB device not enabled - upgrade BIOS?\n"); | |
7c1f59c9 | 187 | retval = -ENODEV; |
1da177e4 LT |
188 | goto exit_free; |
189 | } | |
190 | ||
191 | /* Is SMB Host controller enabled? */ | |
192 | pci_read_config_byte(dev, SMBHSTCFG, &temp); | |
193 | if ((temp & 1) == 0) { | |
194 | dev_err(&dev->dev, "SMBus controller not enabled - upgrade BIOS?\n"); | |
7c1f59c9 | 195 | retval = -ENODEV; |
1da177e4 LT |
196 | goto exit_free; |
197 | } | |
198 | ||
199 | /* set SMB clock to 74KHz as recommended in data sheet */ | |
200 | pci_write_config_byte(dev, SMBCLK, 0x20); | |
201 | ||
202 | /* | |
203 | The interrupt routing for SMB is set up in register 0x77 in the | |
204 | 1533 ISA Bridge device, NOT in the 7101 device. | |
205 | Don't bother with finding the 1533 device and reading the register. | |
206 | if ((....... & 0x0F) == 1) | |
207 | dev_dbg(&dev->dev, "ALI1535 using Interrupt 9 for SMBus.\n"); | |
208 | */ | |
209 | pci_read_config_byte(dev, SMBREV, &temp); | |
210 | dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp); | |
65a2d74b | 211 | dev_dbg(&dev->dev, "ALI1535_smba = 0x%lx\n", ali1535_smba); |
1da177e4 | 212 | |
7c1f59c9 | 213 | return 0; |
1da177e4 LT |
214 | |
215 | exit_free: | |
216 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); | |
7c1f59c9 | 217 | exit: |
1da177e4 LT |
218 | return retval; |
219 | } | |
220 | ||
221 | static int ali1535_transaction(struct i2c_adapter *adap) | |
222 | { | |
223 | int temp; | |
224 | int result = 0; | |
225 | int timeout = 0; | |
226 | ||
227 | dev_dbg(&adap->dev, "Transaction (pre): STS=%02x, TYP=%02x, " | |
228 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", | |
229 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), | |
230 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); | |
231 | ||
232 | /* get status */ | |
233 | temp = inb_p(SMBHSTSTS); | |
234 | ||
235 | /* Make sure the SMBus host is ready to start transmitting */ | |
236 | /* Check the busy bit first */ | |
237 | if (temp & ALI1535_STS_BUSY) { | |
238 | /* If the host controller is still busy, it may have timed out | |
239 | * in the previous transaction, resulting in a "SMBus Timeout" | |
240 | * printk. I've tried the following to reset a stuck busy bit. | |
241 | * 1. Reset the controller with an KILL command. (this | |
242 | * doesn't seem to clear the controller if an external | |
243 | * device is hung) | |
244 | * 2. Reset the controller and the other SMBus devices with a | |
245 | * T_OUT command. (this clears the host busy bit if an | |
246 | * external device is hung, but it comes back upon a new | |
247 | * access to a device) | |
248 | * 3. Disable and reenable the controller in SMBHSTCFG. Worst | |
249 | * case, nothing seems to work except power reset. | |
250 | */ | |
251 | ||
252 | /* Try resetting entire SMB bus, including other devices - This | |
253 | * may not work either - it clears the BUSY bit but then the | |
254 | * BUSY bit may come back on when you try and use the chip | |
255 | * again. If that's the case you are stuck. | |
256 | */ | |
257 | dev_info(&adap->dev, | |
258 | "Resetting entire SMB Bus to clear busy condition (%02x)\n", | |
259 | temp); | |
260 | outb_p(ALI1535_T_OUT, SMBHSTTYP); | |
261 | temp = inb_p(SMBHSTSTS); | |
262 | } | |
263 | ||
264 | /* now check the error bits and the busy bit */ | |
265 | if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { | |
266 | /* do a clear-on-write */ | |
267 | outb_p(0xFF, SMBHSTSTS); | |
3fea5df4 LC |
268 | temp = inb_p(SMBHSTSTS); |
269 | if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { | |
1da177e4 LT |
270 | /* This is probably going to be correctable only by a |
271 | * power reset as one of the bits now appears to be | |
272 | * stuck */ | |
273 | /* This may be a bus or device with electrical problems. */ | |
274 | dev_err(&adap->dev, | |
275 | "SMBus reset failed! (0x%02x) - controller or " | |
276 | "device on bus is probably hung\n", temp); | |
97140342 | 277 | return -EBUSY; |
1da177e4 LT |
278 | } |
279 | } else { | |
280 | /* check and clear done bit */ | |
3fea5df4 | 281 | if (temp & ALI1535_STS_DONE) |
1da177e4 | 282 | outb_p(temp, SMBHSTSTS); |
1da177e4 LT |
283 | } |
284 | ||
285 | /* start the transaction by writing anything to the start register */ | |
286 | outb_p(0xFF, SMBHSTPORT); | |
287 | ||
288 | /* We will always wait for a fraction of a second! */ | |
289 | timeout = 0; | |
290 | do { | |
3fea5df4 | 291 | usleep_range(1000, 2000); |
1da177e4 LT |
292 | temp = inb_p(SMBHSTSTS); |
293 | } while (((temp & ALI1535_STS_BUSY) && !(temp & ALI1535_STS_IDLE)) | |
294 | && (timeout++ < MAX_TIMEOUT)); | |
295 | ||
296 | /* If the SMBus is still busy, we give up */ | |
4ccc28f7 | 297 | if (timeout > MAX_TIMEOUT) { |
97140342 | 298 | result = -ETIMEDOUT; |
1da177e4 LT |
299 | dev_err(&adap->dev, "SMBus Timeout!\n"); |
300 | } | |
301 | ||
302 | if (temp & ALI1535_STS_FAIL) { | |
97140342 | 303 | result = -EIO; |
1da177e4 LT |
304 | dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); |
305 | } | |
306 | ||
307 | /* Unfortunately the ALI SMB controller maps "no response" and "bus | |
25985edc | 308 | * collision" into a single bit. No response is the usual case so don't |
1da177e4 LT |
309 | * do a printk. This means that bus collisions go unreported. |
310 | */ | |
311 | if (temp & ALI1535_STS_BUSERR) { | |
97140342 | 312 | result = -ENXIO; |
1da177e4 LT |
313 | dev_dbg(&adap->dev, |
314 | "Error: no response or bus collision ADD=%02x\n", | |
315 | inb_p(SMBHSTADD)); | |
316 | } | |
317 | ||
318 | /* haven't ever seen this */ | |
319 | if (temp & ALI1535_STS_DEV) { | |
97140342 | 320 | result = -EIO; |
1da177e4 LT |
321 | dev_err(&adap->dev, "Error: device error\n"); |
322 | } | |
323 | ||
324 | /* check to see if the "command complete" indication is set */ | |
325 | if (!(temp & ALI1535_STS_DONE)) { | |
97140342 | 326 | result = -ETIMEDOUT; |
1da177e4 LT |
327 | dev_err(&adap->dev, "Error: command never completed\n"); |
328 | } | |
329 | ||
330 | dev_dbg(&adap->dev, "Transaction (post): STS=%02x, TYP=%02x, " | |
331 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", | |
332 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), | |
333 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); | |
334 | ||
335 | /* take consequent actions for error conditions */ | |
336 | if (!(temp & ALI1535_STS_DONE)) { | |
337 | /* issue "kill" to reset host controller */ | |
3fea5df4 LC |
338 | outb_p(ALI1535_KILL, SMBHSTTYP); |
339 | outb_p(0xFF, SMBHSTSTS); | |
1da177e4 LT |
340 | } else if (temp & ALI1535_STS_ERR) { |
341 | /* issue "timeout" to reset all devices on bus */ | |
3fea5df4 LC |
342 | outb_p(ALI1535_T_OUT, SMBHSTTYP); |
343 | outb_p(0xFF, SMBHSTSTS); | |
1da177e4 LT |
344 | } |
345 | ||
346 | return result; | |
347 | } | |
348 | ||
97140342 | 349 | /* Return negative errno on error. */ |
1da177e4 LT |
350 | static s32 ali1535_access(struct i2c_adapter *adap, u16 addr, |
351 | unsigned short flags, char read_write, u8 command, | |
352 | int size, union i2c_smbus_data *data) | |
353 | { | |
354 | int i, len; | |
355 | int temp; | |
356 | int timeout; | |
357 | s32 result = 0; | |
358 | ||
1da177e4 LT |
359 | /* make sure SMBus is idle */ |
360 | temp = inb_p(SMBHSTSTS); | |
361 | for (timeout = 0; | |
362 | (timeout < MAX_TIMEOUT) && !(temp & ALI1535_STS_IDLE); | |
363 | timeout++) { | |
3fea5df4 | 364 | usleep_range(1000, 2000); |
1da177e4 LT |
365 | temp = inb_p(SMBHSTSTS); |
366 | } | |
367 | if (timeout >= MAX_TIMEOUT) | |
368 | dev_warn(&adap->dev, "Idle wait Timeout! STS=0x%02x\n", temp); | |
369 | ||
370 | /* clear status register (clear-on-write) */ | |
371 | outb_p(0xFF, SMBHSTSTS); | |
372 | ||
373 | switch (size) { | |
1da177e4 LT |
374 | case I2C_SMBUS_QUICK: |
375 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
376 | SMBHSTADD); | |
377 | size = ALI1535_QUICK; | |
378 | outb_p(size, SMBHSTTYP); /* output command */ | |
379 | break; | |
380 | case I2C_SMBUS_BYTE: | |
381 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
382 | SMBHSTADD); | |
383 | size = ALI1535_BYTE; | |
384 | outb_p(size, SMBHSTTYP); /* output command */ | |
385 | if (read_write == I2C_SMBUS_WRITE) | |
386 | outb_p(command, SMBHSTCMD); | |
387 | break; | |
388 | case I2C_SMBUS_BYTE_DATA: | |
389 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
390 | SMBHSTADD); | |
391 | size = ALI1535_BYTE_DATA; | |
392 | outb_p(size, SMBHSTTYP); /* output command */ | |
393 | outb_p(command, SMBHSTCMD); | |
394 | if (read_write == I2C_SMBUS_WRITE) | |
395 | outb_p(data->byte, SMBHSTDAT0); | |
396 | break; | |
397 | case I2C_SMBUS_WORD_DATA: | |
398 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
399 | SMBHSTADD); | |
400 | size = ALI1535_WORD_DATA; | |
401 | outb_p(size, SMBHSTTYP); /* output command */ | |
402 | outb_p(command, SMBHSTCMD); | |
403 | if (read_write == I2C_SMBUS_WRITE) { | |
404 | outb_p(data->word & 0xff, SMBHSTDAT0); | |
405 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); | |
406 | } | |
407 | break; | |
408 | case I2C_SMBUS_BLOCK_DATA: | |
409 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
410 | SMBHSTADD); | |
411 | size = ALI1535_BLOCK_DATA; | |
412 | outb_p(size, SMBHSTTYP); /* output command */ | |
413 | outb_p(command, SMBHSTCMD); | |
414 | if (read_write == I2C_SMBUS_WRITE) { | |
415 | len = data->block[0]; | |
416 | if (len < 0) { | |
417 | len = 0; | |
418 | data->block[0] = len; | |
419 | } | |
420 | if (len > 32) { | |
421 | len = 32; | |
422 | data->block[0] = len; | |
423 | } | |
424 | outb_p(len, SMBHSTDAT0); | |
425 | /* Reset SMBBLKDAT */ | |
426 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); | |
427 | for (i = 1; i <= len; i++) | |
428 | outb_p(data->block[i], SMBBLKDAT); | |
429 | } | |
430 | break; | |
ac7fc4fb JD |
431 | default: |
432 | dev_warn(&adap->dev, "Unsupported transaction %d\n", size); | |
433 | result = -EOPNOTSUPP; | |
434 | goto EXIT; | |
1da177e4 LT |
435 | } |
436 | ||
97140342 DB |
437 | result = ali1535_transaction(adap); |
438 | if (result) | |
1da177e4 | 439 | goto EXIT; |
1da177e4 LT |
440 | |
441 | if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) { | |
442 | result = 0; | |
443 | goto EXIT; | |
444 | } | |
445 | ||
446 | switch (size) { | |
447 | case ALI1535_BYTE: /* Result put in SMBHSTDAT0 */ | |
448 | data->byte = inb_p(SMBHSTDAT0); | |
449 | break; | |
450 | case ALI1535_BYTE_DATA: | |
451 | data->byte = inb_p(SMBHSTDAT0); | |
452 | break; | |
453 | case ALI1535_WORD_DATA: | |
454 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); | |
455 | break; | |
456 | case ALI1535_BLOCK_DATA: | |
457 | len = inb_p(SMBHSTDAT0); | |
458 | if (len > 32) | |
459 | len = 32; | |
460 | data->block[0] = len; | |
461 | /* Reset SMBBLKDAT */ | |
462 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); | |
463 | for (i = 1; i <= data->block[0]; i++) { | |
464 | data->block[i] = inb_p(SMBBLKDAT); | |
465 | dev_dbg(&adap->dev, "Blk: len=%d, i=%d, data=%02x\n", | |
466 | len, i, data->block[i]); | |
467 | } | |
468 | break; | |
469 | } | |
470 | EXIT: | |
1da177e4 LT |
471 | return result; |
472 | } | |
473 | ||
474 | ||
475 | static u32 ali1535_func(struct i2c_adapter *adapter) | |
476 | { | |
477 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | | |
478 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | | |
479 | I2C_FUNC_SMBUS_BLOCK_DATA; | |
480 | } | |
481 | ||
8f9082c5 | 482 | static const struct i2c_algorithm smbus_algorithm = { |
1da177e4 LT |
483 | .smbus_xfer = ali1535_access, |
484 | .functionality = ali1535_func, | |
485 | }; | |
486 | ||
487 | static struct i2c_adapter ali1535_adapter = { | |
488 | .owner = THIS_MODULE, | |
3401b2ff | 489 | .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, |
1da177e4 | 490 | .algo = &smbus_algorithm, |
1da177e4 LT |
491 | }; |
492 | ||
392debf1 | 493 | static const struct pci_device_id ali1535_ids[] = { |
1da177e4 LT |
494 | { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101) }, |
495 | { }, | |
496 | }; | |
497 | ||
3fea5df4 | 498 | MODULE_DEVICE_TABLE(pci, ali1535_ids); |
1da177e4 | 499 | |
0b255e92 | 500 | static int ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4 LT |
501 | { |
502 | if (ali1535_setup(dev)) { | |
503 | dev_warn(&dev->dev, | |
504 | "ALI1535 not detected, module not inserted.\n"); | |
505 | return -ENODEV; | |
506 | } | |
507 | ||
405ae7d3 | 508 | /* set up the sysfs linkage to our parent device */ |
1da177e4 LT |
509 | ali1535_adapter.dev.parent = &dev->dev; |
510 | ||
2096b956 | 511 | snprintf(ali1535_adapter.name, sizeof(ali1535_adapter.name), |
65a2d74b | 512 | "SMBus ALI1535 adapter at %04x", ali1535_offset); |
1da177e4 LT |
513 | return i2c_add_adapter(&ali1535_adapter); |
514 | } | |
515 | ||
0b255e92 | 516 | static void ali1535_remove(struct pci_dev *dev) |
1da177e4 LT |
517 | { |
518 | i2c_del_adapter(&ali1535_adapter); | |
519 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); | |
520 | } | |
521 | ||
522 | static struct pci_driver ali1535_driver = { | |
523 | .name = "ali1535_smbus", | |
524 | .id_table = ali1535_ids, | |
525 | .probe = ali1535_probe, | |
0b255e92 | 526 | .remove = ali1535_remove, |
1da177e4 LT |
527 | }; |
528 | ||
56f21788 | 529 | module_pci_driver(ali1535_driver); |
1da177e4 LT |
530 | |
531 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " | |
532 | "Philip Edelbrock <phil@netroedge.com>, " | |
533 | "Mark D. Studebaker <mdsxyz123@yahoo.com> " | |
534 | "and Dan Eaton <dan.eaton@rocketlogix.com>"); | |
535 | MODULE_DESCRIPTION("ALI1535 SMBus driver"); | |
536 | MODULE_LICENSE("GPL"); |