2 Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl>,
3 Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker
5 Copyright (C) 2007, 2008 Jean Delvare <khali@linux-fr.org>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 Supports the following Intel I/O Controller Hubs (ICH):
26 region SMBus Block proc. block
27 Chip name PCI ID size PEC buffer call read
28 ----------------------------------------------------------------------
29 82801AA (ICH) 0x2413 16 no no no no
30 82801AB (ICH0) 0x2423 16 no no no no
31 82801BA (ICH2) 0x2443 16 no no no no
32 82801CA (ICH3) 0x2483 32 soft no no no
33 82801DB (ICH4) 0x24c3 32 hard yes no no
34 82801E (ICH5) 0x24d3 32 hard yes yes yes
35 6300ESB 0x25a4 32 hard yes yes yes
36 82801F (ICH6) 0x266a 32 hard yes yes yes
37 6310ESB/6320ESB 0x269b 32 hard yes yes yes
38 82801G (ICH7) 0x27da 32 hard yes yes yes
39 82801H (ICH8) 0x283e 32 hard yes yes yes
40 82801I (ICH9) 0x2930 32 hard yes yes yes
41 Tolapai 0x5032 32 hard yes yes yes
42 ICH10 0x3a30 32 hard yes yes yes
43 ICH10 0x3a60 32 hard yes yes yes
44 PCH 0x3b30 32 hard yes yes yes
46 Features supported by this driver:
50 Block process call transaction no
51 I2C block read transaction yes (doesn't use the block buffer)
53 See the file Documentation/i2c/busses/i2c-i801 for details.
56 /* Note: we assume there can only be one I801, with one SMBus interface */
58 #include <linux/module.h>
59 #include <linux/pci.h>
60 #include <linux/kernel.h>
61 #include <linux/stddef.h>
62 #include <linux/delay.h>
63 #include <linux/ioport.h>
64 #include <linux/init.h>
65 #include <linux/i2c.h>
66 #include <linux/acpi.h>
69 /* I801 SMBus address offsets */
70 #define SMBHSTSTS (0 + i801_smba)
71 #define SMBHSTCNT (2 + i801_smba)
72 #define SMBHSTCMD (3 + i801_smba)
73 #define SMBHSTADD (4 + i801_smba)
74 #define SMBHSTDAT0 (5 + i801_smba)
75 #define SMBHSTDAT1 (6 + i801_smba)
76 #define SMBBLKDAT (7 + i801_smba)
77 #define SMBPEC (8 + i801_smba) /* ICH3 and later */
78 #define SMBAUXSTS (12 + i801_smba) /* ICH4 and later */
79 #define SMBAUXCTL (13 + i801_smba) /* ICH4 and later */
81 /* PCI Address Constants */
83 #define SMBHSTCFG 0x040
85 /* Host configuration bits for SMBHSTCFG */
86 #define SMBHSTCFG_HST_EN 1
87 #define SMBHSTCFG_SMB_SMI_EN 2
88 #define SMBHSTCFG_I2C_EN 4
90 /* Auxillary control register bits, ICH4+ only */
91 #define SMBAUXCTL_CRC 1
92 #define SMBAUXCTL_E32B 2
94 /* kill bit for SMBHSTCNT */
95 #define SMBHSTCNT_KILL 2
98 #define MAX_TIMEOUT 100
99 #define ENABLE_INT9 0 /* set to 0x01 to enable - untested */
101 /* I801 command constants */
102 #define I801_QUICK 0x00
103 #define I801_BYTE 0x04
104 #define I801_BYTE_DATA 0x08
105 #define I801_WORD_DATA 0x0C
106 #define I801_PROC_CALL 0x10 /* unimplemented */
107 #define I801_BLOCK_DATA 0x14
108 #define I801_I2C_BLOCK_DATA 0x18 /* ICH5 and later */
109 #define I801_BLOCK_LAST 0x34
110 #define I801_I2C_BLOCK_LAST 0x38 /* ICH5 and later */
111 #define I801_START 0x40
112 #define I801_PEC_EN 0x80 /* ICH3 and later */
114 /* I801 Hosts Status register bits */
115 #define SMBHSTSTS_BYTE_DONE 0x80
116 #define SMBHSTSTS_INUSE_STS 0x40
117 #define SMBHSTSTS_SMBALERT_STS 0x20
118 #define SMBHSTSTS_FAILED 0x10
119 #define SMBHSTSTS_BUS_ERR 0x08
120 #define SMBHSTSTS_DEV_ERR 0x04
121 #define SMBHSTSTS_INTR 0x02
122 #define SMBHSTSTS_HOST_BUSY 0x01
124 #define STATUS_FLAGS (SMBHSTSTS_BYTE_DONE | SMBHSTSTS_FAILED | \
125 SMBHSTSTS_BUS_ERR | SMBHSTSTS_DEV_ERR | \
128 static unsigned long i801_smba;
129 static unsigned char i801_original_hstcfg;
130 static struct pci_driver i801_driver;
131 static struct pci_dev *I801_dev;
133 #define FEATURE_SMBUS_PEC (1 << 0)
134 #define FEATURE_BLOCK_BUFFER (1 << 1)
135 #define FEATURE_BLOCK_PROC (1 << 2)
136 #define FEATURE_I2C_BLOCK_READ (1 << 3)
137 static unsigned int i801_features;
139 /* Make sure the SMBus host is ready to start transmitting.
140 Return 0 if it is, -EBUSY if it is not. */
141 static int i801_check_pre(void)
145 status = inb_p(SMBHSTSTS);
146 if (status & SMBHSTSTS_HOST_BUSY) {
147 dev_err(&I801_dev->dev, "SMBus is busy, can't use it!\n");
151 status &= STATUS_FLAGS;
153 dev_dbg(&I801_dev->dev, "Clearing status flags (%02x)\n",
155 outb_p(status, SMBHSTSTS);
156 status = inb_p(SMBHSTSTS) & STATUS_FLAGS;
158 dev_err(&I801_dev->dev,
159 "Failed clearing status flags (%02x)\n",
168 /* Convert the status register to an error code, and clear it. */
169 static int i801_check_post(int status, int timeout)
173 /* If the SMBus is still busy, we give up */
175 dev_err(&I801_dev->dev, "Transaction timeout\n");
176 /* try to stop the current command */
177 dev_dbg(&I801_dev->dev, "Terminating the current operation\n");
178 outb_p(inb_p(SMBHSTCNT) | SMBHSTCNT_KILL, SMBHSTCNT);
180 outb_p(inb_p(SMBHSTCNT) & (~SMBHSTCNT_KILL), SMBHSTCNT);
182 /* Check if it worked */
183 status = inb_p(SMBHSTSTS);
184 if ((status & SMBHSTSTS_HOST_BUSY) ||
185 !(status & SMBHSTSTS_FAILED))
186 dev_err(&I801_dev->dev,
187 "Failed terminating the transaction\n");
188 outb_p(STATUS_FLAGS, SMBHSTSTS);
192 if (status & SMBHSTSTS_FAILED) {
194 dev_err(&I801_dev->dev, "Transaction failed\n");
196 if (status & SMBHSTSTS_DEV_ERR) {
198 dev_dbg(&I801_dev->dev, "No response\n");
200 if (status & SMBHSTSTS_BUS_ERR) {
202 dev_dbg(&I801_dev->dev, "Lost arbitration\n");
206 /* Clear error flags */
207 outb_p(status & STATUS_FLAGS, SMBHSTSTS);
208 status = inb_p(SMBHSTSTS) & STATUS_FLAGS;
210 dev_warn(&I801_dev->dev, "Failed clearing status "
211 "flags at end of transaction (%02x)\n",
219 static int i801_transaction(int xact)
225 result = i801_check_pre();
229 /* the current contents of SMBHSTCNT can be overwritten, since PEC,
230 * INTREN, SMBSCMD are passed in xact */
231 outb_p(xact | I801_START, SMBHSTCNT);
233 /* We will always wait for a fraction of a second! */
236 status = inb_p(SMBHSTSTS);
237 } while ((status & SMBHSTSTS_HOST_BUSY) && (timeout++ < MAX_TIMEOUT));
239 result = i801_check_post(status, timeout >= MAX_TIMEOUT);
243 outb_p(SMBHSTSTS_INTR, SMBHSTSTS);
247 /* wait for INTR bit as advised by Intel */
248 static void i801_wait_hwpec(void)
255 status = inb_p(SMBHSTSTS);
256 } while ((!(status & SMBHSTSTS_INTR))
257 && (timeout++ < MAX_TIMEOUT));
259 if (timeout >= MAX_TIMEOUT) {
260 dev_dbg(&I801_dev->dev, "PEC Timeout!\n");
262 outb_p(status, SMBHSTSTS);
265 static int i801_block_transaction_by_block(union i2c_smbus_data *data,
266 char read_write, int hwpec)
271 inb_p(SMBHSTCNT); /* reset the data buffer index */
273 /* Use 32-byte buffer to process this transaction */
274 if (read_write == I2C_SMBUS_WRITE) {
275 len = data->block[0];
276 outb_p(len, SMBHSTDAT0);
277 for (i = 0; i < len; i++)
278 outb_p(data->block[i+1], SMBBLKDAT);
281 status = i801_transaction(I801_BLOCK_DATA | ENABLE_INT9 |
282 I801_PEC_EN * hwpec);
286 if (read_write == I2C_SMBUS_READ) {
287 len = inb_p(SMBHSTDAT0);
288 if (len < 1 || len > I2C_SMBUS_BLOCK_MAX)
291 data->block[0] = len;
292 for (i = 0; i < len; i++)
293 data->block[i + 1] = inb_p(SMBBLKDAT);
298 static int i801_block_transaction_byte_by_byte(union i2c_smbus_data *data,
299 char read_write, int command,
308 result = i801_check_pre();
312 len = data->block[0];
314 if (read_write == I2C_SMBUS_WRITE) {
315 outb_p(len, SMBHSTDAT0);
316 outb_p(data->block[1], SMBBLKDAT);
319 for (i = 1; i <= len; i++) {
320 if (i == len && read_write == I2C_SMBUS_READ) {
321 if (command == I2C_SMBUS_I2C_BLOCK_DATA)
322 smbcmd = I801_I2C_BLOCK_LAST;
324 smbcmd = I801_BLOCK_LAST;
326 if (command == I2C_SMBUS_I2C_BLOCK_DATA
327 && read_write == I2C_SMBUS_READ)
328 smbcmd = I801_I2C_BLOCK_DATA;
330 smbcmd = I801_BLOCK_DATA;
332 outb_p(smbcmd | ENABLE_INT9, SMBHSTCNT);
335 outb_p(inb(SMBHSTCNT) | I801_START, SMBHSTCNT);
337 /* We will always wait for a fraction of a second! */
341 status = inb_p(SMBHSTSTS);
343 while ((!(status & SMBHSTSTS_BYTE_DONE))
344 && (timeout++ < MAX_TIMEOUT));
346 result = i801_check_post(status, timeout >= MAX_TIMEOUT);
350 if (i == 1 && read_write == I2C_SMBUS_READ
351 && command != I2C_SMBUS_I2C_BLOCK_DATA) {
352 len = inb_p(SMBHSTDAT0);
353 if (len < 1 || len > I2C_SMBUS_BLOCK_MAX) {
354 dev_err(&I801_dev->dev,
355 "Illegal SMBus block read size %d\n",
358 while (inb_p(SMBHSTSTS) & SMBHSTSTS_HOST_BUSY)
359 outb_p(SMBHSTSTS_BYTE_DONE, SMBHSTSTS);
360 outb_p(SMBHSTSTS_INTR, SMBHSTSTS);
363 data->block[0] = len;
366 /* Retrieve/store value in SMBBLKDAT */
367 if (read_write == I2C_SMBUS_READ)
368 data->block[i] = inb_p(SMBBLKDAT);
369 if (read_write == I2C_SMBUS_WRITE && i+1 <= len)
370 outb_p(data->block[i+1], SMBBLKDAT);
372 /* signals SMBBLKDAT ready */
373 outb_p(SMBHSTSTS_BYTE_DONE | SMBHSTSTS_INTR, SMBHSTSTS);
379 static int i801_set_block_buffer_mode(void)
381 outb_p(inb_p(SMBAUXCTL) | SMBAUXCTL_E32B, SMBAUXCTL);
382 if ((inb_p(SMBAUXCTL) & SMBAUXCTL_E32B) == 0)
387 /* Block transaction function */
388 static int i801_block_transaction(union i2c_smbus_data *data, char read_write,
389 int command, int hwpec)
394 if (command == I2C_SMBUS_I2C_BLOCK_DATA) {
395 if (read_write == I2C_SMBUS_WRITE) {
396 /* set I2C_EN bit in configuration register */
397 pci_read_config_byte(I801_dev, SMBHSTCFG, &hostc);
398 pci_write_config_byte(I801_dev, SMBHSTCFG,
399 hostc | SMBHSTCFG_I2C_EN);
400 } else if (!(i801_features & FEATURE_I2C_BLOCK_READ)) {
401 dev_err(&I801_dev->dev,
402 "I2C block read is unsupported!\n");
407 if (read_write == I2C_SMBUS_WRITE
408 || command == I2C_SMBUS_I2C_BLOCK_DATA) {
409 if (data->block[0] < 1)
411 if (data->block[0] > I2C_SMBUS_BLOCK_MAX)
412 data->block[0] = I2C_SMBUS_BLOCK_MAX;
414 data->block[0] = 32; /* max for SMBus block reads */
417 if ((i801_features & FEATURE_BLOCK_BUFFER)
418 && !(command == I2C_SMBUS_I2C_BLOCK_DATA
419 && read_write == I2C_SMBUS_READ)
420 && i801_set_block_buffer_mode() == 0)
421 result = i801_block_transaction_by_block(data, read_write,
424 result = i801_block_transaction_byte_by_byte(data, read_write,
427 if (result == 0 && hwpec)
430 if (command == I2C_SMBUS_I2C_BLOCK_DATA
431 && read_write == I2C_SMBUS_WRITE) {
432 /* restore saved configuration register value */
433 pci_write_config_byte(I801_dev, SMBHSTCFG, hostc);
438 /* Return negative errno on error. */
439 static s32 i801_access(struct i2c_adapter * adap, u16 addr,
440 unsigned short flags, char read_write, u8 command,
441 int size, union i2c_smbus_data * data)
447 hwpec = (i801_features & FEATURE_SMBUS_PEC) && (flags & I2C_CLIENT_PEC)
448 && size != I2C_SMBUS_QUICK
449 && size != I2C_SMBUS_I2C_BLOCK_DATA;
452 case I2C_SMBUS_QUICK:
453 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
458 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
460 if (read_write == I2C_SMBUS_WRITE)
461 outb_p(command, SMBHSTCMD);
464 case I2C_SMBUS_BYTE_DATA:
465 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
467 outb_p(command, SMBHSTCMD);
468 if (read_write == I2C_SMBUS_WRITE)
469 outb_p(data->byte, SMBHSTDAT0);
470 xact = I801_BYTE_DATA;
472 case I2C_SMBUS_WORD_DATA:
473 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
475 outb_p(command, SMBHSTCMD);
476 if (read_write == I2C_SMBUS_WRITE) {
477 outb_p(data->word & 0xff, SMBHSTDAT0);
478 outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
480 xact = I801_WORD_DATA;
482 case I2C_SMBUS_BLOCK_DATA:
483 outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
485 outb_p(command, SMBHSTCMD);
488 case I2C_SMBUS_I2C_BLOCK_DATA:
489 /* NB: page 240 of ICH5 datasheet shows that the R/#W
490 * bit should be cleared here, even when reading */
491 outb_p((addr & 0x7f) << 1, SMBHSTADD);
492 if (read_write == I2C_SMBUS_READ) {
493 /* NB: page 240 of ICH5 datasheet also shows
494 * that DATA1 is the cmd field when reading */
495 outb_p(command, SMBHSTDAT1);
497 outb_p(command, SMBHSTCMD);
501 dev_err(&I801_dev->dev, "Unsupported transaction %d\n", size);
505 if (hwpec) /* enable/disable hardware PEC */
506 outb_p(inb_p(SMBAUXCTL) | SMBAUXCTL_CRC, SMBAUXCTL);
508 outb_p(inb_p(SMBAUXCTL) & (~SMBAUXCTL_CRC), SMBAUXCTL);
511 ret = i801_block_transaction(data, read_write, size, hwpec);
513 ret = i801_transaction(xact | ENABLE_INT9);
515 /* Some BIOSes don't like it when PEC is enabled at reboot or resume
516 time, so we forcibly disable it after every transaction. Turn off
517 E32B for the same reason. */
519 outb_p(inb_p(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B),
526 if ((read_write == I2C_SMBUS_WRITE) || (xact == I801_QUICK))
529 switch (xact & 0x7f) {
530 case I801_BYTE: /* Result put in SMBHSTDAT0 */
532 data->byte = inb_p(SMBHSTDAT0);
535 data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
542 static u32 i801_func(struct i2c_adapter *adapter)
544 return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
545 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
546 I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_WRITE_I2C_BLOCK |
547 ((i801_features & FEATURE_SMBUS_PEC) ? I2C_FUNC_SMBUS_PEC : 0) |
548 ((i801_features & FEATURE_I2C_BLOCK_READ) ?
549 I2C_FUNC_SMBUS_READ_I2C_BLOCK : 0);
552 static const struct i2c_algorithm smbus_algorithm = {
553 .smbus_xfer = i801_access,
554 .functionality = i801_func,
557 static struct i2c_adapter i801_adapter = {
558 .owner = THIS_MODULE,
559 .id = I2C_HW_SMBUS_I801,
560 .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
561 .algo = &smbus_algorithm,
564 static struct pci_device_id i801_ids[] = {
565 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_3) },
566 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_3) },
567 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_2) },
568 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_3) },
569 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_3) },
570 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_3) },
571 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_4) },
572 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_16) },
573 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_17) },
574 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_17) },
575 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_5) },
576 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_6) },
577 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TOLAPAI_1) },
578 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_4) },
579 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH10_5) },
580 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PCH_SMBUS) },
584 MODULE_DEVICE_TABLE (pci, i801_ids);
586 #if defined CONFIG_INPUT_APANEL || defined CONFIG_INPUT_APANEL_MODULE
587 static unsigned char apanel_addr;
589 /* Scan the system ROM for the signature "FJKEYINF" */
590 static __init const void __iomem *bios_signature(const void __iomem *bios)
593 const unsigned char signature[] = "FJKEYINF";
595 for (offset = 0; offset < 0x10000; offset += 0x10) {
596 if (check_signature(bios + offset, signature,
597 sizeof(signature)-1))
598 return bios + offset;
603 static void __init input_apanel_init(void)
606 const void __iomem *p;
608 bios = ioremap(0xF0000, 0x10000); /* Can't fail */
609 p = bios_signature(bios);
611 /* just use the first address */
612 apanel_addr = readb(p + 8 + 3) >> 1;
617 static void __init input_apanel_init(void) {}
620 static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
627 switch (dev->device) {
628 case PCI_DEVICE_ID_INTEL_82801EB_3:
629 case PCI_DEVICE_ID_INTEL_ESB_4:
630 case PCI_DEVICE_ID_INTEL_ICH6_16:
631 case PCI_DEVICE_ID_INTEL_ICH7_17:
632 case PCI_DEVICE_ID_INTEL_ESB2_17:
633 case PCI_DEVICE_ID_INTEL_ICH8_5:
634 case PCI_DEVICE_ID_INTEL_ICH9_6:
635 case PCI_DEVICE_ID_INTEL_TOLAPAI_1:
636 case PCI_DEVICE_ID_INTEL_ICH10_4:
637 case PCI_DEVICE_ID_INTEL_ICH10_5:
638 case PCI_DEVICE_ID_INTEL_PCH_SMBUS:
639 i801_features |= FEATURE_I2C_BLOCK_READ;
641 case PCI_DEVICE_ID_INTEL_82801DB_3:
642 i801_features |= FEATURE_SMBUS_PEC;
643 i801_features |= FEATURE_BLOCK_BUFFER;
647 err = pci_enable_device(dev);
649 dev_err(&dev->dev, "Failed to enable SMBus PCI device (%d)\n",
654 /* Determine the address of the SMBus area */
655 i801_smba = pci_resource_start(dev, SMBBAR);
657 dev_err(&dev->dev, "SMBus base address uninitialized, "
663 err = acpi_check_resource_conflict(&dev->resource[SMBBAR]);
667 err = pci_request_region(dev, SMBBAR, i801_driver.name);
669 dev_err(&dev->dev, "Failed to request SMBus region "
670 "0x%lx-0x%Lx\n", i801_smba,
671 (unsigned long long)pci_resource_end(dev, SMBBAR));
675 pci_read_config_byte(I801_dev, SMBHSTCFG, &temp);
676 i801_original_hstcfg = temp;
677 temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */
678 if (!(temp & SMBHSTCFG_HST_EN)) {
679 dev_info(&dev->dev, "Enabling SMBus device\n");
680 temp |= SMBHSTCFG_HST_EN;
682 pci_write_config_byte(I801_dev, SMBHSTCFG, temp);
684 if (temp & SMBHSTCFG_SMB_SMI_EN)
685 dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n");
687 dev_dbg(&dev->dev, "SMBus using PCI Interrupt\n");
689 /* Clear special mode bits */
690 if (i801_features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER))
691 outb_p(inb_p(SMBAUXCTL) & ~(SMBAUXCTL_CRC | SMBAUXCTL_E32B),
694 /* set up the sysfs linkage to our parent device */
695 i801_adapter.dev.parent = &dev->dev;
697 snprintf(i801_adapter.name, sizeof(i801_adapter.name),
698 "SMBus I801 adapter at %04lx", i801_smba);
699 err = i2c_add_adapter(&i801_adapter);
701 dev_err(&dev->dev, "Failed to add SMBus adapter\n");
705 /* Register optional slaves */
706 #if defined CONFIG_INPUT_APANEL || defined CONFIG_INPUT_APANEL_MODULE
708 struct i2c_board_info info;
710 memset(&info, 0, sizeof(struct i2c_board_info));
711 info.addr = apanel_addr;
712 strlcpy(info.type, "fujitsu_apanel", I2C_NAME_SIZE);
713 i2c_new_device(&i801_adapter, &info);
720 pci_release_region(dev, SMBBAR);
725 static void __devexit i801_remove(struct pci_dev *dev)
727 i2c_del_adapter(&i801_adapter);
728 pci_write_config_byte(I801_dev, SMBHSTCFG, i801_original_hstcfg);
729 pci_release_region(dev, SMBBAR);
731 * do not call pci_disable_device(dev) since it can cause hard hangs on
732 * some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010)
737 static int i801_suspend(struct pci_dev *dev, pm_message_t mesg)
740 pci_write_config_byte(dev, SMBHSTCFG, i801_original_hstcfg);
741 pci_set_power_state(dev, pci_choose_state(dev, mesg));
745 static int i801_resume(struct pci_dev *dev)
747 pci_set_power_state(dev, PCI_D0);
748 pci_restore_state(dev);
749 return pci_enable_device(dev);
752 #define i801_suspend NULL
753 #define i801_resume NULL
756 static struct pci_driver i801_driver = {
757 .name = "i801_smbus",
758 .id_table = i801_ids,
760 .remove = __devexit_p(i801_remove),
761 .suspend = i801_suspend,
762 .resume = i801_resume,
765 static int __init i2c_i801_init(void)
768 return pci_register_driver(&i801_driver);
771 static void __exit i2c_i801_exit(void)
773 pci_unregister_driver(&i801_driver);
776 MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>, "
777 "Jean Delvare <khali@linux-fr.org>");
778 MODULE_DESCRIPTION("I801 SMBus driver");
779 MODULE_LICENSE("GPL");
781 module_init(i2c_i801_init);
782 module_exit(i2c_i801_exit);