2 Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl> and
3 Philip Edelbrock <phil@netroedge.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
19 Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100
20 ATI IXP200, IXP300, IXP400, SB600, SB700/SP5100, SB800
24 Note: we assume there can only be one device, with one or more
26 The device can register multiple i2c_adapters (up to PIIX4_MAX_ADAPTERS).
27 For devices supporting multiple ports the i2c_adapter should provide
28 an i2c_algorithm to access them.
31 #include <linux/module.h>
32 #include <linux/moduleparam.h>
33 #include <linux/pci.h>
34 #include <linux/kernel.h>
35 #include <linux/delay.h>
36 #include <linux/stddef.h>
37 #include <linux/ioport.h>
38 #include <linux/i2c.h>
39 #include <linux/slab.h>
40 #include <linux/dmi.h>
41 #include <linux/acpi.h>
43 #include <linux/mutex.h>
46 /* PIIX4 SMBus address offsets */
47 #define SMBHSTSTS (0 + piix4_smba)
48 #define SMBHSLVSTS (1 + piix4_smba)
49 #define SMBHSTCNT (2 + piix4_smba)
50 #define SMBHSTCMD (3 + piix4_smba)
51 #define SMBHSTADD (4 + piix4_smba)
52 #define SMBHSTDAT0 (5 + piix4_smba)
53 #define SMBHSTDAT1 (6 + piix4_smba)
54 #define SMBBLKDAT (7 + piix4_smba)
55 #define SMBSLVCNT (8 + piix4_smba)
56 #define SMBSHDWCMD (9 + piix4_smba)
57 #define SMBSLVEVT (0xA + piix4_smba)
58 #define SMBSLVDAT (0xC + piix4_smba)
60 /* count for request_region */
63 /* PCI Address Constants */
65 #define SMBHSTCFG 0x0D2
67 #define SMBSHDW1 0x0D4
68 #define SMBSHDW2 0x0D5
72 #define MAX_TIMEOUT 500
76 #define PIIX4_QUICK 0x00
77 #define PIIX4_BYTE 0x04
78 #define PIIX4_BYTE_DATA 0x08
79 #define PIIX4_WORD_DATA 0x0C
80 #define PIIX4_BLOCK_DATA 0x14
82 /* Multi-port constants */
83 #define PIIX4_MAX_ADAPTERS 4
86 #define SB800_PIIX4_SMB_IDX 0xcd6
88 /* SB800 port is selected by bits 2:1 of the smb_en register (0x2c) */
89 #define SB800_PIIX4_PORT_IDX 0x2c
90 #define SB800_PIIX4_PORT_IDX_MASK 0x06
92 /* insmod parameters */
94 /* If force is set to anything different from 0, we forcibly enable the
97 module_param (force
, int, 0);
98 MODULE_PARM_DESC(force
, "Forcibly enable the PIIX4. DANGEROUS!");
100 /* If force_addr is set to anything different from 0, we forcibly enable
101 the PIIX4 at the given address. VERY DANGEROUS! */
102 static int force_addr
;
103 module_param (force_addr
, int, 0);
104 MODULE_PARM_DESC(force_addr
,
105 "Forcibly enable the PIIX4 at the given address. "
106 "EXTREMELY DANGEROUS!");
108 static int srvrworks_csb5_delay
;
109 static struct pci_driver piix4_driver
;
111 static const struct dmi_system_id piix4_dmi_blacklist
[] = {
113 .ident
= "Sapphire AM2RD790",
115 DMI_MATCH(DMI_BOARD_VENDOR
, "SAPPHIRE Inc."),
116 DMI_MATCH(DMI_BOARD_NAME
, "PC-AM2RD790"),
120 .ident
= "DFI Lanparty UT 790FX",
122 DMI_MATCH(DMI_BOARD_VENDOR
, "DFI Inc."),
123 DMI_MATCH(DMI_BOARD_NAME
, "LP UT 790FX"),
129 /* The IBM entry is in a separate table because we only check it
130 on Intel-based systems */
131 static const struct dmi_system_id piix4_dmi_ibm
[] = {
134 .matches
= { DMI_MATCH(DMI_SYS_VENDOR
, "IBM"), },
140 static const char *piix4_main_port_names_sb800
[PIIX4_MAX_ADAPTERS
] = {
141 "SDA0", "SDA2", "SDA3", "SDA4"
143 static const char *piix4_aux_port_name_sb800
= "SDA1";
145 struct i2c_piix4_adapdata
{
154 static int piix4_setup(struct pci_dev
*PIIX4_dev
,
155 const struct pci_device_id
*id
)
158 unsigned short piix4_smba
;
160 if ((PIIX4_dev
->vendor
== PCI_VENDOR_ID_SERVERWORKS
) &&
161 (PIIX4_dev
->device
== PCI_DEVICE_ID_SERVERWORKS_CSB5
))
162 srvrworks_csb5_delay
= 1;
164 /* On some motherboards, it was reported that accessing the SMBus
165 caused severe hardware problems */
166 if (dmi_check_system(piix4_dmi_blacklist
)) {
167 dev_err(&PIIX4_dev
->dev
,
168 "Accessing the SMBus on this system is unsafe!\n");
172 /* Don't access SMBus on IBM systems which get corrupted eeproms */
173 if (dmi_check_system(piix4_dmi_ibm
) &&
174 PIIX4_dev
->vendor
== PCI_VENDOR_ID_INTEL
) {
175 dev_err(&PIIX4_dev
->dev
, "IBM system detected; this module "
176 "may corrupt your serial eeprom! Refusing to load "
181 /* Determine the address of the SMBus areas */
183 piix4_smba
= force_addr
& 0xfff0;
186 pci_read_config_word(PIIX4_dev
, SMBBA
, &piix4_smba
);
187 piix4_smba
&= 0xfff0;
188 if(piix4_smba
== 0) {
189 dev_err(&PIIX4_dev
->dev
, "SMBus base address "
190 "uninitialized - upgrade BIOS or use "
191 "force_addr=0xaddr\n");
196 if (acpi_check_region(piix4_smba
, SMBIOSIZE
, piix4_driver
.name
))
199 if (!request_region(piix4_smba
, SMBIOSIZE
, piix4_driver
.name
)) {
200 dev_err(&PIIX4_dev
->dev
, "SMBus region 0x%x already in use!\n",
205 pci_read_config_byte(PIIX4_dev
, SMBHSTCFG
, &temp
);
207 /* If force_addr is set, we program the new address here. Just to make
208 sure, we disable the PIIX4 first. */
210 pci_write_config_byte(PIIX4_dev
, SMBHSTCFG
, temp
& 0xfe);
211 pci_write_config_word(PIIX4_dev
, SMBBA
, piix4_smba
);
212 pci_write_config_byte(PIIX4_dev
, SMBHSTCFG
, temp
| 0x01);
213 dev_info(&PIIX4_dev
->dev
, "WARNING: SMBus interface set to "
214 "new address %04x!\n", piix4_smba
);
215 } else if ((temp
& 1) == 0) {
217 /* This should never need to be done, but has been
218 * noted that many Dell machines have the SMBus
219 * interface on the PIIX4 disabled!? NOTE: This assumes
220 * I/O space and other allocations WERE done by the
221 * Bios! Don't complain if your hardware does weird
222 * things after enabling this. :') Check for Bios
223 * updates before resorting to this.
225 pci_write_config_byte(PIIX4_dev
, SMBHSTCFG
,
227 dev_notice(&PIIX4_dev
->dev
,
228 "WARNING: SMBus interface has been FORCEFULLY ENABLED!\n");
230 dev_err(&PIIX4_dev
->dev
,
231 "SMBus Host Controller not enabled!\n");
232 release_region(piix4_smba
, SMBIOSIZE
);
237 if (((temp
& 0x0E) == 8) || ((temp
& 0x0E) == 2))
238 dev_dbg(&PIIX4_dev
->dev
, "Using IRQ for SMBus\n");
239 else if ((temp
& 0x0E) == 0)
240 dev_dbg(&PIIX4_dev
->dev
, "Using SMI# for SMBus\n");
242 dev_err(&PIIX4_dev
->dev
, "Illegal Interrupt configuration "
243 "(or code out of date)!\n");
245 pci_read_config_byte(PIIX4_dev
, SMBREV
, &temp
);
246 dev_info(&PIIX4_dev
->dev
,
247 "SMBus Host Controller at 0x%x, revision %d\n",
253 static int piix4_setup_sb800(struct pci_dev
*PIIX4_dev
,
254 const struct pci_device_id
*id
, u8 aux
)
256 unsigned short piix4_smba
;
257 u8 smba_en_lo
, smba_en_hi
, smb_en
, smb_en_status
;
258 u8 i2ccfg
, i2ccfg_offset
= 0x10;
260 /* SB800 and later SMBus does not support forcing address */
261 if (force
|| force_addr
) {
262 dev_err(&PIIX4_dev
->dev
, "SMBus does not support "
263 "forcing address!\n");
267 /* Determine the address of the SMBus areas */
268 if ((PIIX4_dev
->vendor
== PCI_VENDOR_ID_AMD
&&
269 PIIX4_dev
->device
== PCI_DEVICE_ID_AMD_HUDSON2_SMBUS
&&
270 PIIX4_dev
->revision
>= 0x41) ||
271 (PIIX4_dev
->vendor
== PCI_VENDOR_ID_AMD
&&
272 PIIX4_dev
->device
== PCI_DEVICE_ID_AMD_KERNCZ_SMBUS
&&
273 PIIX4_dev
->revision
>= 0x49))
276 smb_en
= (aux
) ? 0x28 : 0x2c;
278 outb_p(smb_en
, SB800_PIIX4_SMB_IDX
);
279 smba_en_lo
= inb_p(SB800_PIIX4_SMB_IDX
+ 1);
280 outb_p(smb_en
+ 1, SB800_PIIX4_SMB_IDX
);
281 smba_en_hi
= inb_p(SB800_PIIX4_SMB_IDX
+ 1);
284 smb_en_status
= smba_en_lo
& 0x10;
285 piix4_smba
= smba_en_hi
<< 8;
289 smb_en_status
= smba_en_lo
& 0x01;
290 piix4_smba
= ((smba_en_hi
<< 8) | smba_en_lo
) & 0xffe0;
293 if (!smb_en_status
) {
294 dev_err(&PIIX4_dev
->dev
,
295 "SMBus Host Controller not enabled!\n");
299 if (acpi_check_region(piix4_smba
, SMBIOSIZE
, piix4_driver
.name
))
302 if (!request_region(piix4_smba
, SMBIOSIZE
, piix4_driver
.name
)) {
303 dev_err(&PIIX4_dev
->dev
, "SMBus region 0x%x already in use!\n",
308 /* Aux SMBus does not support IRQ information */
310 dev_info(&PIIX4_dev
->dev
,
311 "Auxiliary SMBus Host Controller at 0x%x\n",
316 /* Request the SMBus I2C bus config region */
317 if (!request_region(piix4_smba
+ i2ccfg_offset
, 1, "i2ccfg")) {
318 dev_err(&PIIX4_dev
->dev
, "SMBus I2C bus config region "
319 "0x%x already in use!\n", piix4_smba
+ i2ccfg_offset
);
320 release_region(piix4_smba
, SMBIOSIZE
);
323 i2ccfg
= inb_p(piix4_smba
+ i2ccfg_offset
);
324 release_region(piix4_smba
+ i2ccfg_offset
, 1);
327 dev_dbg(&PIIX4_dev
->dev
, "Using IRQ for SMBus\n");
329 dev_dbg(&PIIX4_dev
->dev
, "Using SMI# for SMBus\n");
331 dev_info(&PIIX4_dev
->dev
,
332 "SMBus Host Controller at 0x%x, revision %d\n",
333 piix4_smba
, i2ccfg
>> 4);
338 static int piix4_setup_aux(struct pci_dev
*PIIX4_dev
,
339 const struct pci_device_id
*id
,
340 unsigned short base_reg_addr
)
342 /* Set up auxiliary SMBus controllers found on some
343 * AMD chipsets e.g. SP5100 (SB700 derivative) */
345 unsigned short piix4_smba
;
347 /* Read address of auxiliary SMBus controller */
348 pci_read_config_word(PIIX4_dev
, base_reg_addr
, &piix4_smba
);
349 if ((piix4_smba
& 1) == 0) {
350 dev_dbg(&PIIX4_dev
->dev
,
351 "Auxiliary SMBus controller not enabled\n");
355 piix4_smba
&= 0xfff0;
356 if (piix4_smba
== 0) {
357 dev_dbg(&PIIX4_dev
->dev
,
358 "Auxiliary SMBus base address uninitialized\n");
362 if (acpi_check_region(piix4_smba
, SMBIOSIZE
, piix4_driver
.name
))
365 if (!request_region(piix4_smba
, SMBIOSIZE
, piix4_driver
.name
)) {
366 dev_err(&PIIX4_dev
->dev
, "Auxiliary SMBus region 0x%x "
367 "already in use!\n", piix4_smba
);
371 dev_info(&PIIX4_dev
->dev
,
372 "Auxiliary SMBus Host Controller at 0x%x\n",
378 static int piix4_transaction(struct i2c_adapter
*piix4_adapter
)
380 struct i2c_piix4_adapdata
*adapdata
= i2c_get_adapdata(piix4_adapter
);
381 unsigned short piix4_smba
= adapdata
->smba
;
386 dev_dbg(&piix4_adapter
->dev
, "Transaction (pre): CNT=%02x, CMD=%02x, "
387 "ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT
),
388 inb_p(SMBHSTCMD
), inb_p(SMBHSTADD
), inb_p(SMBHSTDAT0
),
391 /* Make sure the SMBus host is ready to start transmitting */
392 if ((temp
= inb_p(SMBHSTSTS
)) != 0x00) {
393 dev_dbg(&piix4_adapter
->dev
, "SMBus busy (%02x). "
394 "Resetting...\n", temp
);
395 outb_p(temp
, SMBHSTSTS
);
396 if ((temp
= inb_p(SMBHSTSTS
)) != 0x00) {
397 dev_err(&piix4_adapter
->dev
, "Failed! (%02x)\n", temp
);
400 dev_dbg(&piix4_adapter
->dev
, "Successful!\n");
404 /* start the transaction by setting bit 6 */
405 outb_p(inb(SMBHSTCNT
) | 0x040, SMBHSTCNT
);
407 /* We will always wait for a fraction of a second! (See PIIX4 docs errata) */
408 if (srvrworks_csb5_delay
) /* Extra delay for SERVERWORKS_CSB5 */
413 while ((++timeout
< MAX_TIMEOUT
) &&
414 ((temp
= inb_p(SMBHSTSTS
)) & 0x01))
417 /* If the SMBus is still busy, we give up */
418 if (timeout
== MAX_TIMEOUT
) {
419 dev_err(&piix4_adapter
->dev
, "SMBus Timeout!\n");
425 dev_err(&piix4_adapter
->dev
, "Error: Failed bus transaction\n");
430 dev_dbg(&piix4_adapter
->dev
, "Bus collision! SMBus may be "
431 "locked until next hard reset. (sorry!)\n");
432 /* Clock stops and slave is stuck in mid-transmission */
437 dev_dbg(&piix4_adapter
->dev
, "Error: no response!\n");
440 if (inb_p(SMBHSTSTS
) != 0x00)
441 outb_p(inb(SMBHSTSTS
), SMBHSTSTS
);
443 if ((temp
= inb_p(SMBHSTSTS
)) != 0x00) {
444 dev_err(&piix4_adapter
->dev
, "Failed reset at end of "
445 "transaction (%02x)\n", temp
);
447 dev_dbg(&piix4_adapter
->dev
, "Transaction (post): CNT=%02x, CMD=%02x, "
448 "ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT
),
449 inb_p(SMBHSTCMD
), inb_p(SMBHSTADD
), inb_p(SMBHSTDAT0
),
454 /* Return negative errno on error. */
455 static s32
piix4_access(struct i2c_adapter
* adap
, u16 addr
,
456 unsigned short flags
, char read_write
,
457 u8 command
, int size
, union i2c_smbus_data
* data
)
459 struct i2c_piix4_adapdata
*adapdata
= i2c_get_adapdata(adap
);
460 unsigned short piix4_smba
= adapdata
->smba
;
465 case I2C_SMBUS_QUICK
:
466 outb_p((addr
<< 1) | read_write
,
471 outb_p((addr
<< 1) | read_write
,
473 if (read_write
== I2C_SMBUS_WRITE
)
474 outb_p(command
, SMBHSTCMD
);
477 case I2C_SMBUS_BYTE_DATA
:
478 outb_p((addr
<< 1) | read_write
,
480 outb_p(command
, SMBHSTCMD
);
481 if (read_write
== I2C_SMBUS_WRITE
)
482 outb_p(data
->byte
, SMBHSTDAT0
);
483 size
= PIIX4_BYTE_DATA
;
485 case I2C_SMBUS_WORD_DATA
:
486 outb_p((addr
<< 1) | read_write
,
488 outb_p(command
, SMBHSTCMD
);
489 if (read_write
== I2C_SMBUS_WRITE
) {
490 outb_p(data
->word
& 0xff, SMBHSTDAT0
);
491 outb_p((data
->word
& 0xff00) >> 8, SMBHSTDAT1
);
493 size
= PIIX4_WORD_DATA
;
495 case I2C_SMBUS_BLOCK_DATA
:
496 outb_p((addr
<< 1) | read_write
,
498 outb_p(command
, SMBHSTCMD
);
499 if (read_write
== I2C_SMBUS_WRITE
) {
500 len
= data
->block
[0];
501 if (len
== 0 || len
> I2C_SMBUS_BLOCK_MAX
)
503 outb_p(len
, SMBHSTDAT0
);
504 inb_p(SMBHSTCNT
); /* Reset SMBBLKDAT */
505 for (i
= 1; i
<= len
; i
++)
506 outb_p(data
->block
[i
], SMBBLKDAT
);
508 size
= PIIX4_BLOCK_DATA
;
511 dev_warn(&adap
->dev
, "Unsupported transaction %d\n", size
);
515 outb_p((size
& 0x1C) + (ENABLE_INT9
& 1), SMBHSTCNT
);
517 status
= piix4_transaction(adap
);
521 if ((read_write
== I2C_SMBUS_WRITE
) || (size
== PIIX4_QUICK
))
527 case PIIX4_BYTE_DATA
:
528 data
->byte
= inb_p(SMBHSTDAT0
);
530 case PIIX4_WORD_DATA
:
531 data
->word
= inb_p(SMBHSTDAT0
) + (inb_p(SMBHSTDAT1
) << 8);
533 case PIIX4_BLOCK_DATA
:
534 data
->block
[0] = inb_p(SMBHSTDAT0
);
535 if (data
->block
[0] == 0 || data
->block
[0] > I2C_SMBUS_BLOCK_MAX
)
537 inb_p(SMBHSTCNT
); /* Reset SMBBLKDAT */
538 for (i
= 1; i
<= data
->block
[0]; i
++)
539 data
->block
[i
] = inb_p(SMBBLKDAT
);
546 * Handles access to multiple SMBus ports on the SB800.
547 * The port is selected by bits 2:1 of the smb_en register (0x2c).
548 * Returns negative errno on error.
550 * Note: The selected port must be returned to the initial selection to avoid
551 * problems on certain systems.
553 static s32
piix4_access_sb800(struct i2c_adapter
*adap
, u16 addr
,
554 unsigned short flags
, char read_write
,
555 u8 command
, int size
, union i2c_smbus_data
*data
)
557 struct i2c_piix4_adapdata
*adapdata
= i2c_get_adapdata(adap
);
562 mutex_lock(adapdata
->mutex
);
564 outb_p(SB800_PIIX4_PORT_IDX
, SB800_PIIX4_SMB_IDX
);
565 smba_en_lo
= inb_p(SB800_PIIX4_SMB_IDX
+ 1);
567 port
= adapdata
->port
;
568 if ((smba_en_lo
& SB800_PIIX4_PORT_IDX_MASK
) != (port
<< 1))
569 outb_p((smba_en_lo
& ~SB800_PIIX4_PORT_IDX_MASK
) | (port
<< 1),
570 SB800_PIIX4_SMB_IDX
+ 1);
572 retval
= piix4_access(adap
, addr
, flags
, read_write
,
573 command
, size
, data
);
575 outb_p(smba_en_lo
, SB800_PIIX4_SMB_IDX
+ 1);
577 mutex_unlock(adapdata
->mutex
);
582 static u32
piix4_func(struct i2c_adapter
*adapter
)
584 return I2C_FUNC_SMBUS_QUICK
| I2C_FUNC_SMBUS_BYTE
|
585 I2C_FUNC_SMBUS_BYTE_DATA
| I2C_FUNC_SMBUS_WORD_DATA
|
586 I2C_FUNC_SMBUS_BLOCK_DATA
;
589 static const struct i2c_algorithm smbus_algorithm
= {
590 .smbus_xfer
= piix4_access
,
591 .functionality
= piix4_func
,
594 static const struct i2c_algorithm piix4_smbus_algorithm_sb800
= {
595 .smbus_xfer
= piix4_access_sb800
,
596 .functionality
= piix4_func
,
599 static const struct pci_device_id piix4_ids
[] = {
600 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_82371AB_3
) },
601 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, PCI_DEVICE_ID_INTEL_82443MX_3
) },
602 { PCI_DEVICE(PCI_VENDOR_ID_EFAR
, PCI_DEVICE_ID_EFAR_SLC90E66_3
) },
603 { PCI_DEVICE(PCI_VENDOR_ID_ATI
, PCI_DEVICE_ID_ATI_IXP200_SMBUS
) },
604 { PCI_DEVICE(PCI_VENDOR_ID_ATI
, PCI_DEVICE_ID_ATI_IXP300_SMBUS
) },
605 { PCI_DEVICE(PCI_VENDOR_ID_ATI
, PCI_DEVICE_ID_ATI_IXP400_SMBUS
) },
606 { PCI_DEVICE(PCI_VENDOR_ID_ATI
, PCI_DEVICE_ID_ATI_SBX00_SMBUS
) },
607 { PCI_DEVICE(PCI_VENDOR_ID_AMD
, PCI_DEVICE_ID_AMD_HUDSON2_SMBUS
) },
608 { PCI_DEVICE(PCI_VENDOR_ID_AMD
, PCI_DEVICE_ID_AMD_KERNCZ_SMBUS
) },
609 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS
,
610 PCI_DEVICE_ID_SERVERWORKS_OSB4
) },
611 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS
,
612 PCI_DEVICE_ID_SERVERWORKS_CSB5
) },
613 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS
,
614 PCI_DEVICE_ID_SERVERWORKS_CSB6
) },
615 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS
,
616 PCI_DEVICE_ID_SERVERWORKS_HT1000SB
) },
617 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS
,
618 PCI_DEVICE_ID_SERVERWORKS_HT1100LD
) },
622 MODULE_DEVICE_TABLE (pci
, piix4_ids
);
624 static struct i2c_adapter
*piix4_main_adapters
[PIIX4_MAX_ADAPTERS
];
625 static struct i2c_adapter
*piix4_aux_adapter
;
627 static int piix4_add_adapter(struct pci_dev
*dev
, unsigned short smba
,
628 const char *name
, struct i2c_adapter
**padap
)
630 struct i2c_adapter
*adap
;
631 struct i2c_piix4_adapdata
*adapdata
;
634 adap
= kzalloc(sizeof(*adap
), GFP_KERNEL
);
636 release_region(smba
, SMBIOSIZE
);
640 adap
->owner
= THIS_MODULE
;
641 adap
->class = I2C_CLASS_HWMON
| I2C_CLASS_SPD
;
642 adap
->algo
= &smbus_algorithm
;
644 adapdata
= kzalloc(sizeof(*adapdata
), GFP_KERNEL
);
645 if (adapdata
== NULL
) {
647 release_region(smba
, SMBIOSIZE
);
651 adapdata
->smba
= smba
;
653 /* set up the sysfs linkage to our parent device */
654 adap
->dev
.parent
= &dev
->dev
;
656 snprintf(adap
->name
, sizeof(adap
->name
),
657 "SMBus PIIX4 adapter %s at %04x", name
, smba
);
659 i2c_set_adapdata(adap
, adapdata
);
661 retval
= i2c_add_adapter(adap
);
663 dev_err(&dev
->dev
, "Couldn't register adapter!\n");
666 release_region(smba
, SMBIOSIZE
);
674 static int piix4_add_adapters_sb800(struct pci_dev
*dev
, unsigned short smba
)
677 struct i2c_piix4_adapdata
*adapdata
;
681 mutex
= kzalloc(sizeof(*mutex
), GFP_KERNEL
);
687 for (port
= 0; port
< PIIX4_MAX_ADAPTERS
; port
++) {
688 retval
= piix4_add_adapter(dev
, smba
,
689 piix4_main_port_names_sb800
[port
],
690 &piix4_main_adapters
[port
]);
694 piix4_main_adapters
[port
]->algo
= &piix4_smbus_algorithm_sb800
;
696 adapdata
= i2c_get_adapdata(piix4_main_adapters
[port
]);
697 adapdata
->sb800_main
= true;
698 adapdata
->port
= port
;
699 adapdata
->mutex
= mutex
;
706 "Error setting up SB800 adapters. Unregistering!\n");
707 while (--port
>= 0) {
708 adapdata
= i2c_get_adapdata(piix4_main_adapters
[port
]);
709 if (adapdata
->smba
) {
710 i2c_del_adapter(piix4_main_adapters
[port
]);
712 kfree(piix4_main_adapters
[port
]);
713 piix4_main_adapters
[port
] = NULL
;
722 static int piix4_probe(struct pci_dev
*dev
, const struct pci_device_id
*id
)
726 if ((dev
->vendor
== PCI_VENDOR_ID_ATI
&&
727 dev
->device
== PCI_DEVICE_ID_ATI_SBX00_SMBUS
&&
728 dev
->revision
>= 0x40) ||
729 dev
->vendor
== PCI_VENDOR_ID_AMD
) {
730 if (!request_region(SB800_PIIX4_SMB_IDX
, 2, "smba_idx")) {
732 "SMBus base address index region 0x%x already in use!\n",
733 SB800_PIIX4_SMB_IDX
);
737 /* base address location etc changed in SB800 */
738 retval
= piix4_setup_sb800(dev
, id
, 0);
740 release_region(SB800_PIIX4_SMB_IDX
, 2);
745 * Try to register multiplexed main SMBus adapter,
746 * give up if we can't
748 retval
= piix4_add_adapters_sb800(dev
, retval
);
750 release_region(SB800_PIIX4_SMB_IDX
, 2);
754 retval
= piix4_setup(dev
, id
);
758 /* Try to register main SMBus adapter, give up if we can't */
759 retval
= piix4_add_adapter(dev
, retval
, "main",
760 &piix4_main_adapters
[0]);
765 /* Check for auxiliary SMBus on some AMD chipsets */
768 if (dev
->vendor
== PCI_VENDOR_ID_ATI
&&
769 dev
->device
== PCI_DEVICE_ID_ATI_SBX00_SMBUS
) {
770 if (dev
->revision
< 0x40) {
771 retval
= piix4_setup_aux(dev
, id
, 0x58);
773 /* SB800 added aux bus too */
774 retval
= piix4_setup_sb800(dev
, id
, 1);
778 if (dev
->vendor
== PCI_VENDOR_ID_AMD
&&
779 dev
->device
== PCI_DEVICE_ID_AMD_HUDSON2_SMBUS
) {
780 retval
= piix4_setup_sb800(dev
, id
, 1);
784 /* Try to add the aux adapter if it exists,
785 * piix4_add_adapter will clean up if this fails */
786 piix4_add_adapter(dev
, retval
, piix4_aux_port_name_sb800
,
793 static void piix4_adap_remove(struct i2c_adapter
*adap
)
795 struct i2c_piix4_adapdata
*adapdata
= i2c_get_adapdata(adap
);
797 if (adapdata
->smba
) {
798 i2c_del_adapter(adap
);
799 if (adapdata
->port
== 0) {
800 release_region(adapdata
->smba
, SMBIOSIZE
);
801 if (adapdata
->sb800_main
) {
802 kfree(adapdata
->mutex
);
803 release_region(SB800_PIIX4_SMB_IDX
, 2);
811 static void piix4_remove(struct pci_dev
*dev
)
813 int port
= PIIX4_MAX_ADAPTERS
;
815 while (--port
>= 0) {
816 if (piix4_main_adapters
[port
]) {
817 piix4_adap_remove(piix4_main_adapters
[port
]);
818 piix4_main_adapters
[port
] = NULL
;
822 if (piix4_aux_adapter
) {
823 piix4_adap_remove(piix4_aux_adapter
);
824 piix4_aux_adapter
= NULL
;
828 static struct pci_driver piix4_driver
= {
829 .name
= "piix4_smbus",
830 .id_table
= piix4_ids
,
831 .probe
= piix4_probe
,
832 .remove
= piix4_remove
,
835 module_pci_driver(piix4_driver
);
837 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
838 "Philip Edelbrock <phil@netroedge.com>");
839 MODULE_DESCRIPTION("PIIX4 SMBus driver");
840 MODULE_LICENSE("GPL");