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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
3fea5df4 LC |
3 | * Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>, |
4 | * Philip Edelbrock <phil@netroedge.com>, | |
5 | * Mark D. Studebaker <mdsxyz123@yahoo.com>, | |
6 | * Dan Eaton <dan.eaton@rocketlogix.com> and | |
7 | * Stephen Rousset <stephen.rousset@rocketlogix.com> | |
1da177e4 LT |
8 | */ |
9 | ||
10 | /* | |
11 | This is the driver for the SMB Host controller on | |
12 | Acer Labs Inc. (ALI) M1535 South Bridge. | |
13 | ||
14 | The M1535 is a South bridge for portable systems. | |
15 | It is very similar to the M15x3 South bridges also produced | |
16 | by Acer Labs Inc. Some of the registers within the part | |
17 | have moved and some have been redefined slightly. Additionally, | |
18 | the sequencing of the SMBus transactions has been modified | |
19 | to be more consistent with the sequencing recommended by | |
20 | the manufacturer and observed through testing. These | |
21 | changes are reflected in this driver and can be identified | |
22 | by comparing this driver to the i2c-ali15x3 driver. | |
23 | For an overview of these chips see http://www.acerlabs.com | |
24 | ||
25 | The SMB controller is part of the 7101 device, which is an | |
26 | ACPI-compliant Power Management Unit (PMU). | |
27 | ||
28 | The whole 7101 device has to be enabled for the SMB to work. | |
29 | You can't just enable the SMB alone. | |
30 | The SMB and the ACPI have separate I/O spaces. | |
31 | We make sure that the SMB is enabled. We leave the ACPI alone. | |
32 | ||
33 | This driver controls the SMB Host only. | |
34 | ||
35 | This driver does not use interrupts. | |
36 | */ | |
37 | ||
38 | ||
39 | /* Note: we assume there can only be one ALI1535, with one SMBus interface */ | |
40 | ||
1da177e4 LT |
41 | #include <linux/module.h> |
42 | #include <linux/pci.h> | |
43 | #include <linux/kernel.h> | |
44 | #include <linux/stddef.h> | |
1da177e4 LT |
45 | #include <linux/delay.h> |
46 | #include <linux/ioport.h> | |
47 | #include <linux/i2c.h> | |
54fb4a05 | 48 | #include <linux/acpi.h> |
21782180 | 49 | #include <linux/io.h> |
1da177e4 LT |
50 | |
51 | ||
52 | /* ALI1535 SMBus address offsets */ | |
53 | #define SMBHSTSTS (0 + ali1535_smba) | |
54 | #define SMBHSTTYP (1 + ali1535_smba) | |
55 | #define SMBHSTPORT (2 + ali1535_smba) | |
56 | #define SMBHSTCMD (7 + ali1535_smba) | |
57 | #define SMBHSTADD (3 + ali1535_smba) | |
58 | #define SMBHSTDAT0 (4 + ali1535_smba) | |
59 | #define SMBHSTDAT1 (5 + ali1535_smba) | |
60 | #define SMBBLKDAT (6 + ali1535_smba) | |
61 | ||
62 | /* PCI Address Constants */ | |
63 | #define SMBCOM 0x004 | |
64 | #define SMBREV 0x008 | |
65 | #define SMBCFG 0x0D1 | |
66 | #define SMBBA 0x0E2 | |
67 | #define SMBHSTCFG 0x0F0 | |
68 | #define SMBCLK 0x0F2 | |
69 | ||
70 | /* Other settings */ | |
71 | #define MAX_TIMEOUT 500 /* times 1/100 sec */ | |
72 | #define ALI1535_SMB_IOSIZE 32 | |
73 | ||
74 | #define ALI1535_SMB_DEFAULTBASE 0x8040 | |
75 | ||
76 | /* ALI1535 address lock bits */ | |
77 | #define ALI1535_LOCK 0x06 /* dwe */ | |
78 | ||
79 | /* ALI1535 command constants */ | |
80 | #define ALI1535_QUICK 0x00 | |
81 | #define ALI1535_BYTE 0x10 | |
82 | #define ALI1535_BYTE_DATA 0x20 | |
83 | #define ALI1535_WORD_DATA 0x30 | |
84 | #define ALI1535_BLOCK_DATA 0x40 | |
85 | #define ALI1535_I2C_READ 0x60 | |
86 | ||
87 | #define ALI1535_DEV10B_EN 0x80 /* Enable 10-bit addressing in */ | |
88 | /* I2C read */ | |
89 | #define ALI1535_T_OUT 0x08 /* Time-out Command (write) */ | |
90 | #define ALI1535_A_HIGH_BIT9 0x08 /* Bit 9 of 10-bit address in */ | |
91 | /* Alert-Response-Address */ | |
92 | /* (read) */ | |
93 | #define ALI1535_KILL 0x04 /* Kill Command (write) */ | |
94 | #define ALI1535_A_HIGH_BIT8 0x04 /* Bit 8 of 10-bit address in */ | |
95 | /* Alert-Response-Address */ | |
96 | /* (read) */ | |
97 | ||
98 | #define ALI1535_D_HI_MASK 0x03 /* Mask for isolating bits 9-8 */ | |
99 | /* of 10-bit address in I2C */ | |
100 | /* Read Command */ | |
101 | ||
102 | /* ALI1535 status register bits */ | |
103 | #define ALI1535_STS_IDLE 0x04 | |
104 | #define ALI1535_STS_BUSY 0x08 /* host busy */ | |
105 | #define ALI1535_STS_DONE 0x10 /* transaction complete */ | |
106 | #define ALI1535_STS_DEV 0x20 /* device error */ | |
107 | #define ALI1535_STS_BUSERR 0x40 /* bus error */ | |
108 | #define ALI1535_STS_FAIL 0x80 /* failed bus transaction */ | |
109 | #define ALI1535_STS_ERR 0xE0 /* all the bad error bits */ | |
110 | ||
111 | #define ALI1535_BLOCK_CLR 0x04 /* reset block data index */ | |
112 | ||
113 | /* ALI1535 device address register bits */ | |
114 | #define ALI1535_RD_ADDR 0x01 /* Read/Write Bit in Device */ | |
115 | /* Address field */ | |
116 | /* -> Write = 0 */ | |
117 | /* -> Read = 1 */ | |
118 | #define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */ | |
119 | ||
d6072f84 | 120 | static struct pci_driver ali1535_driver; |
65a2d74b | 121 | static unsigned long ali1535_smba; |
122 | static unsigned short ali1535_offset; | |
1da177e4 LT |
123 | |
124 | /* Detect whether a ALI1535 can be found, and initialize it, where necessary. | |
125 | Note the differences between kernels with the old PCI BIOS interface and | |
126 | newer kernels with the real PCI interface. In compat.h some things are | |
127 | defined to make the transition easier. */ | |
0b255e92 | 128 | static int ali1535_setup(struct pci_dev *dev) |
1da177e4 | 129 | { |
7c1f59c9 | 130 | int retval; |
1da177e4 LT |
131 | unsigned char temp; |
132 | ||
133 | /* Check the following things: | |
134 | - SMB I/O address is initialized | |
135 | - Device is enabled | |
136 | - We can use the addresses | |
137 | */ | |
138 | ||
65a2d74b | 139 | retval = pci_enable_device(dev); |
140 | if (retval) { | |
141 | dev_err(&dev->dev, "ALI1535_smb can't enable device\n"); | |
142 | goto exit; | |
143 | } | |
144 | ||
1da177e4 | 145 | /* Determine the address of the SMBus area */ |
65a2d74b | 146 | pci_read_config_word(dev, SMBBA, &ali1535_offset); |
147 | dev_dbg(&dev->dev, "ALI1535_smb is at offset 0x%04x\n", ali1535_offset); | |
148 | ali1535_offset &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1)); | |
149 | if (ali1535_offset == 0) { | |
1da177e4 LT |
150 | dev_warn(&dev->dev, |
151 | "ALI1535_smb region uninitialized - upgrade BIOS?\n"); | |
7c1f59c9 | 152 | retval = -ENODEV; |
1da177e4 LT |
153 | goto exit; |
154 | } | |
155 | ||
65a2d74b | 156 | if (pci_resource_flags(dev, 0) & IORESOURCE_IO) |
157 | ali1535_smba = pci_resource_start(dev, 0) + ali1535_offset; | |
158 | else | |
159 | ali1535_smba = ali1535_offset; | |
160 | ||
54fb4a05 JD |
161 | retval = acpi_check_region(ali1535_smba, ALI1535_SMB_IOSIZE, |
162 | ali1535_driver.name); | |
163 | if (retval) | |
164 | goto exit; | |
165 | ||
d6072f84 JD |
166 | if (!request_region(ali1535_smba, ALI1535_SMB_IOSIZE, |
167 | ali1535_driver.name)) { | |
65a2d74b | 168 | dev_err(&dev->dev, "ALI1535_smb region 0x%lx already in use!\n", |
1da177e4 | 169 | ali1535_smba); |
7c1f59c9 | 170 | retval = -EBUSY; |
1da177e4 LT |
171 | goto exit; |
172 | } | |
173 | ||
174 | /* check if whole device is enabled */ | |
175 | pci_read_config_byte(dev, SMBCFG, &temp); | |
176 | if ((temp & ALI1535_SMBIO_EN) == 0) { | |
177 | dev_err(&dev->dev, "SMB device not enabled - upgrade BIOS?\n"); | |
7c1f59c9 | 178 | retval = -ENODEV; |
1da177e4 LT |
179 | goto exit_free; |
180 | } | |
181 | ||
182 | /* Is SMB Host controller enabled? */ | |
183 | pci_read_config_byte(dev, SMBHSTCFG, &temp); | |
184 | if ((temp & 1) == 0) { | |
185 | dev_err(&dev->dev, "SMBus controller not enabled - upgrade BIOS?\n"); | |
7c1f59c9 | 186 | retval = -ENODEV; |
1da177e4 LT |
187 | goto exit_free; |
188 | } | |
189 | ||
190 | /* set SMB clock to 74KHz as recommended in data sheet */ | |
191 | pci_write_config_byte(dev, SMBCLK, 0x20); | |
192 | ||
193 | /* | |
194 | The interrupt routing for SMB is set up in register 0x77 in the | |
195 | 1533 ISA Bridge device, NOT in the 7101 device. | |
196 | Don't bother with finding the 1533 device and reading the register. | |
197 | if ((....... & 0x0F) == 1) | |
198 | dev_dbg(&dev->dev, "ALI1535 using Interrupt 9 for SMBus.\n"); | |
199 | */ | |
200 | pci_read_config_byte(dev, SMBREV, &temp); | |
201 | dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp); | |
65a2d74b | 202 | dev_dbg(&dev->dev, "ALI1535_smba = 0x%lx\n", ali1535_smba); |
1da177e4 | 203 | |
7c1f59c9 | 204 | return 0; |
1da177e4 LT |
205 | |
206 | exit_free: | |
207 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); | |
7c1f59c9 | 208 | exit: |
1da177e4 LT |
209 | return retval; |
210 | } | |
211 | ||
212 | static int ali1535_transaction(struct i2c_adapter *adap) | |
213 | { | |
214 | int temp; | |
215 | int result = 0; | |
216 | int timeout = 0; | |
217 | ||
218 | dev_dbg(&adap->dev, "Transaction (pre): STS=%02x, TYP=%02x, " | |
219 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", | |
220 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), | |
221 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); | |
222 | ||
223 | /* get status */ | |
224 | temp = inb_p(SMBHSTSTS); | |
225 | ||
226 | /* Make sure the SMBus host is ready to start transmitting */ | |
227 | /* Check the busy bit first */ | |
228 | if (temp & ALI1535_STS_BUSY) { | |
229 | /* If the host controller is still busy, it may have timed out | |
230 | * in the previous transaction, resulting in a "SMBus Timeout" | |
231 | * printk. I've tried the following to reset a stuck busy bit. | |
232 | * 1. Reset the controller with an KILL command. (this | |
233 | * doesn't seem to clear the controller if an external | |
234 | * device is hung) | |
235 | * 2. Reset the controller and the other SMBus devices with a | |
236 | * T_OUT command. (this clears the host busy bit if an | |
237 | * external device is hung, but it comes back upon a new | |
238 | * access to a device) | |
239 | * 3. Disable and reenable the controller in SMBHSTCFG. Worst | |
240 | * case, nothing seems to work except power reset. | |
241 | */ | |
242 | ||
243 | /* Try resetting entire SMB bus, including other devices - This | |
244 | * may not work either - it clears the BUSY bit but then the | |
245 | * BUSY bit may come back on when you try and use the chip | |
246 | * again. If that's the case you are stuck. | |
247 | */ | |
248 | dev_info(&adap->dev, | |
249 | "Resetting entire SMB Bus to clear busy condition (%02x)\n", | |
250 | temp); | |
251 | outb_p(ALI1535_T_OUT, SMBHSTTYP); | |
252 | temp = inb_p(SMBHSTSTS); | |
253 | } | |
254 | ||
255 | /* now check the error bits and the busy bit */ | |
256 | if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { | |
257 | /* do a clear-on-write */ | |
258 | outb_p(0xFF, SMBHSTSTS); | |
3fea5df4 LC |
259 | temp = inb_p(SMBHSTSTS); |
260 | if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) { | |
1da177e4 LT |
261 | /* This is probably going to be correctable only by a |
262 | * power reset as one of the bits now appears to be | |
263 | * stuck */ | |
264 | /* This may be a bus or device with electrical problems. */ | |
265 | dev_err(&adap->dev, | |
266 | "SMBus reset failed! (0x%02x) - controller or " | |
267 | "device on bus is probably hung\n", temp); | |
97140342 | 268 | return -EBUSY; |
1da177e4 LT |
269 | } |
270 | } else { | |
271 | /* check and clear done bit */ | |
3fea5df4 | 272 | if (temp & ALI1535_STS_DONE) |
1da177e4 | 273 | outb_p(temp, SMBHSTSTS); |
1da177e4 LT |
274 | } |
275 | ||
276 | /* start the transaction by writing anything to the start register */ | |
277 | outb_p(0xFF, SMBHSTPORT); | |
278 | ||
279 | /* We will always wait for a fraction of a second! */ | |
280 | timeout = 0; | |
281 | do { | |
3fea5df4 | 282 | usleep_range(1000, 2000); |
1da177e4 LT |
283 | temp = inb_p(SMBHSTSTS); |
284 | } while (((temp & ALI1535_STS_BUSY) && !(temp & ALI1535_STS_IDLE)) | |
285 | && (timeout++ < MAX_TIMEOUT)); | |
286 | ||
287 | /* If the SMBus is still busy, we give up */ | |
4ccc28f7 | 288 | if (timeout > MAX_TIMEOUT) { |
97140342 | 289 | result = -ETIMEDOUT; |
1da177e4 LT |
290 | dev_err(&adap->dev, "SMBus Timeout!\n"); |
291 | } | |
292 | ||
293 | if (temp & ALI1535_STS_FAIL) { | |
97140342 | 294 | result = -EIO; |
1da177e4 LT |
295 | dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); |
296 | } | |
297 | ||
298 | /* Unfortunately the ALI SMB controller maps "no response" and "bus | |
25985edc | 299 | * collision" into a single bit. No response is the usual case so don't |
1da177e4 LT |
300 | * do a printk. This means that bus collisions go unreported. |
301 | */ | |
302 | if (temp & ALI1535_STS_BUSERR) { | |
97140342 | 303 | result = -ENXIO; |
1da177e4 LT |
304 | dev_dbg(&adap->dev, |
305 | "Error: no response or bus collision ADD=%02x\n", | |
306 | inb_p(SMBHSTADD)); | |
307 | } | |
308 | ||
309 | /* haven't ever seen this */ | |
310 | if (temp & ALI1535_STS_DEV) { | |
97140342 | 311 | result = -EIO; |
1da177e4 LT |
312 | dev_err(&adap->dev, "Error: device error\n"); |
313 | } | |
314 | ||
315 | /* check to see if the "command complete" indication is set */ | |
316 | if (!(temp & ALI1535_STS_DONE)) { | |
97140342 | 317 | result = -ETIMEDOUT; |
1da177e4 LT |
318 | dev_err(&adap->dev, "Error: command never completed\n"); |
319 | } | |
320 | ||
321 | dev_dbg(&adap->dev, "Transaction (post): STS=%02x, TYP=%02x, " | |
322 | "CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n", | |
323 | inb_p(SMBHSTSTS), inb_p(SMBHSTTYP), inb_p(SMBHSTCMD), | |
324 | inb_p(SMBHSTADD), inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1)); | |
325 | ||
326 | /* take consequent actions for error conditions */ | |
327 | if (!(temp & ALI1535_STS_DONE)) { | |
328 | /* issue "kill" to reset host controller */ | |
3fea5df4 LC |
329 | outb_p(ALI1535_KILL, SMBHSTTYP); |
330 | outb_p(0xFF, SMBHSTSTS); | |
1da177e4 LT |
331 | } else if (temp & ALI1535_STS_ERR) { |
332 | /* issue "timeout" to reset all devices on bus */ | |
3fea5df4 LC |
333 | outb_p(ALI1535_T_OUT, SMBHSTTYP); |
334 | outb_p(0xFF, SMBHSTSTS); | |
1da177e4 LT |
335 | } |
336 | ||
337 | return result; | |
338 | } | |
339 | ||
97140342 | 340 | /* Return negative errno on error. */ |
1da177e4 LT |
341 | static s32 ali1535_access(struct i2c_adapter *adap, u16 addr, |
342 | unsigned short flags, char read_write, u8 command, | |
343 | int size, union i2c_smbus_data *data) | |
344 | { | |
345 | int i, len; | |
346 | int temp; | |
347 | int timeout; | |
348 | s32 result = 0; | |
349 | ||
1da177e4 LT |
350 | /* make sure SMBus is idle */ |
351 | temp = inb_p(SMBHSTSTS); | |
352 | for (timeout = 0; | |
353 | (timeout < MAX_TIMEOUT) && !(temp & ALI1535_STS_IDLE); | |
354 | timeout++) { | |
3fea5df4 | 355 | usleep_range(1000, 2000); |
1da177e4 LT |
356 | temp = inb_p(SMBHSTSTS); |
357 | } | |
358 | if (timeout >= MAX_TIMEOUT) | |
359 | dev_warn(&adap->dev, "Idle wait Timeout! STS=0x%02x\n", temp); | |
360 | ||
361 | /* clear status register (clear-on-write) */ | |
362 | outb_p(0xFF, SMBHSTSTS); | |
363 | ||
364 | switch (size) { | |
1da177e4 LT |
365 | case I2C_SMBUS_QUICK: |
366 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
367 | SMBHSTADD); | |
368 | size = ALI1535_QUICK; | |
369 | outb_p(size, SMBHSTTYP); /* output command */ | |
370 | break; | |
371 | case I2C_SMBUS_BYTE: | |
372 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
373 | SMBHSTADD); | |
374 | size = ALI1535_BYTE; | |
375 | outb_p(size, SMBHSTTYP); /* output command */ | |
376 | if (read_write == I2C_SMBUS_WRITE) | |
377 | outb_p(command, SMBHSTCMD); | |
378 | break; | |
379 | case I2C_SMBUS_BYTE_DATA: | |
380 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
381 | SMBHSTADD); | |
382 | size = ALI1535_BYTE_DATA; | |
383 | outb_p(size, SMBHSTTYP); /* output command */ | |
384 | outb_p(command, SMBHSTCMD); | |
385 | if (read_write == I2C_SMBUS_WRITE) | |
386 | outb_p(data->byte, SMBHSTDAT0); | |
387 | break; | |
388 | case I2C_SMBUS_WORD_DATA: | |
389 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
390 | SMBHSTADD); | |
391 | size = ALI1535_WORD_DATA; | |
392 | outb_p(size, SMBHSTTYP); /* output command */ | |
393 | outb_p(command, SMBHSTCMD); | |
394 | if (read_write == I2C_SMBUS_WRITE) { | |
395 | outb_p(data->word & 0xff, SMBHSTDAT0); | |
396 | outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); | |
397 | } | |
398 | break; | |
399 | case I2C_SMBUS_BLOCK_DATA: | |
400 | outb_p(((addr & 0x7f) << 1) | (read_write & 0x01), | |
401 | SMBHSTADD); | |
402 | size = ALI1535_BLOCK_DATA; | |
403 | outb_p(size, SMBHSTTYP); /* output command */ | |
404 | outb_p(command, SMBHSTCMD); | |
405 | if (read_write == I2C_SMBUS_WRITE) { | |
406 | len = data->block[0]; | |
407 | if (len < 0) { | |
408 | len = 0; | |
409 | data->block[0] = len; | |
410 | } | |
411 | if (len > 32) { | |
412 | len = 32; | |
413 | data->block[0] = len; | |
414 | } | |
415 | outb_p(len, SMBHSTDAT0); | |
416 | /* Reset SMBBLKDAT */ | |
417 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); | |
418 | for (i = 1; i <= len; i++) | |
419 | outb_p(data->block[i], SMBBLKDAT); | |
420 | } | |
421 | break; | |
ac7fc4fb JD |
422 | default: |
423 | dev_warn(&adap->dev, "Unsupported transaction %d\n", size); | |
424 | result = -EOPNOTSUPP; | |
425 | goto EXIT; | |
1da177e4 LT |
426 | } |
427 | ||
97140342 DB |
428 | result = ali1535_transaction(adap); |
429 | if (result) | |
1da177e4 | 430 | goto EXIT; |
1da177e4 LT |
431 | |
432 | if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK)) { | |
433 | result = 0; | |
434 | goto EXIT; | |
435 | } | |
436 | ||
437 | switch (size) { | |
438 | case ALI1535_BYTE: /* Result put in SMBHSTDAT0 */ | |
439 | data->byte = inb_p(SMBHSTDAT0); | |
440 | break; | |
441 | case ALI1535_BYTE_DATA: | |
442 | data->byte = inb_p(SMBHSTDAT0); | |
443 | break; | |
444 | case ALI1535_WORD_DATA: | |
445 | data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); | |
446 | break; | |
447 | case ALI1535_BLOCK_DATA: | |
448 | len = inb_p(SMBHSTDAT0); | |
449 | if (len > 32) | |
450 | len = 32; | |
451 | data->block[0] = len; | |
452 | /* Reset SMBBLKDAT */ | |
453 | outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); | |
454 | for (i = 1; i <= data->block[0]; i++) { | |
455 | data->block[i] = inb_p(SMBBLKDAT); | |
456 | dev_dbg(&adap->dev, "Blk: len=%d, i=%d, data=%02x\n", | |
457 | len, i, data->block[i]); | |
458 | } | |
459 | break; | |
460 | } | |
461 | EXIT: | |
1da177e4 LT |
462 | return result; |
463 | } | |
464 | ||
465 | ||
466 | static u32 ali1535_func(struct i2c_adapter *adapter) | |
467 | { | |
468 | return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | | |
469 | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | | |
470 | I2C_FUNC_SMBUS_BLOCK_DATA; | |
471 | } | |
472 | ||
8f9082c5 | 473 | static const struct i2c_algorithm smbus_algorithm = { |
1da177e4 LT |
474 | .smbus_xfer = ali1535_access, |
475 | .functionality = ali1535_func, | |
476 | }; | |
477 | ||
478 | static struct i2c_adapter ali1535_adapter = { | |
479 | .owner = THIS_MODULE, | |
3401b2ff | 480 | .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, |
1da177e4 | 481 | .algo = &smbus_algorithm, |
1da177e4 LT |
482 | }; |
483 | ||
392debf1 | 484 | static const struct pci_device_id ali1535_ids[] = { |
1da177e4 LT |
485 | { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101) }, |
486 | { }, | |
487 | }; | |
488 | ||
3fea5df4 | 489 | MODULE_DEVICE_TABLE(pci, ali1535_ids); |
1da177e4 | 490 | |
0b255e92 | 491 | static int ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4 LT |
492 | { |
493 | if (ali1535_setup(dev)) { | |
494 | dev_warn(&dev->dev, | |
495 | "ALI1535 not detected, module not inserted.\n"); | |
496 | return -ENODEV; | |
497 | } | |
498 | ||
405ae7d3 | 499 | /* set up the sysfs linkage to our parent device */ |
1da177e4 LT |
500 | ali1535_adapter.dev.parent = &dev->dev; |
501 | ||
2096b956 | 502 | snprintf(ali1535_adapter.name, sizeof(ali1535_adapter.name), |
65a2d74b | 503 | "SMBus ALI1535 adapter at %04x", ali1535_offset); |
1da177e4 LT |
504 | return i2c_add_adapter(&ali1535_adapter); |
505 | } | |
506 | ||
0b255e92 | 507 | static void ali1535_remove(struct pci_dev *dev) |
1da177e4 LT |
508 | { |
509 | i2c_del_adapter(&ali1535_adapter); | |
510 | release_region(ali1535_smba, ALI1535_SMB_IOSIZE); | |
511 | } | |
512 | ||
513 | static struct pci_driver ali1535_driver = { | |
514 | .name = "ali1535_smbus", | |
515 | .id_table = ali1535_ids, | |
516 | .probe = ali1535_probe, | |
0b255e92 | 517 | .remove = ali1535_remove, |
1da177e4 LT |
518 | }; |
519 | ||
56f21788 | 520 | module_pci_driver(ali1535_driver); |
1da177e4 LT |
521 | |
522 | MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, " | |
523 | "Philip Edelbrock <phil@netroedge.com>, " | |
524 | "Mark D. Studebaker <mdsxyz123@yahoo.com> " | |
525 | "and Dan Eaton <dan.eaton@rocketlogix.com>"); | |
526 | MODULE_DESCRIPTION("ALI1535 SMBus driver"); | |
527 | MODULE_LICENSE("GPL"); |