--- /dev/null
+/*
+ Copyright (c) 1998 - 2002 Frodo Looijaard <frodol@dds.nl> and
+ Philip Edelbrock <phil@netroedge.com>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+*/
+
+/*
+ Supports:
+ Intel PIIX4, 440MX
+ Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100
+ ATI IXP200, IXP300, IXP400, SB600, SB700/SP5100, SB800
+ AMD Hudson-2, ML, CZ
+ SMSC Victory66
+
+ Note: we assume there can only be one device, with one or more
+ SMBus interfaces.
+*/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/stddef.h>
+#include <linux/ioport.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/dmi.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
+
+
+/* PIIX4 SMBus address offsets */
+#define SMBHSTSTS (0 + piix4_smba)
+#define SMBHSLVSTS (1 + piix4_smba)
+#define SMBHSTCNT (2 + piix4_smba)
+#define SMBHSTCMD (3 + piix4_smba)
+#define SMBHSTADD (4 + piix4_smba)
+#define SMBHSTDAT0 (5 + piix4_smba)
+#define SMBHSTDAT1 (6 + piix4_smba)
+#define SMBBLKDAT (7 + piix4_smba)
+#define SMBSLVCNT (8 + piix4_smba)
+#define SMBSHDWCMD (9 + piix4_smba)
+#define SMBSLVEVT (0xA + piix4_smba)
+#define SMBSLVDAT (0xC + piix4_smba)
+
+/* count for request_region */
+#define SMBIOSIZE 8
+
+/* PCI Address Constants */
+#define SMBBA 0x090
+#define SMBHSTCFG 0x0D2
+#define SMBSLVC 0x0D3
+#define SMBSHDW1 0x0D4
+#define SMBSHDW2 0x0D5
+#define SMBREV 0x0D6
+
+/* Other settings */
+#define MAX_TIMEOUT 500
+#define ENABLE_INT9 0
+
+/* PIIX4 constants */
+#define PIIX4_QUICK 0x00
+#define PIIX4_BYTE 0x04
+#define PIIX4_BYTE_DATA 0x08
+#define PIIX4_WORD_DATA 0x0C
+#define PIIX4_BLOCK_DATA 0x14
+
+/* insmod parameters */
+
+/* If force is set to anything different from 0, we forcibly enable the
+ PIIX4. DANGEROUS! */
+static int force;
+module_param (force, int, 0);
+MODULE_PARM_DESC(force, "Forcibly enable the PIIX4. DANGEROUS!");
+
+/* If force_addr is set to anything different from 0, we forcibly enable
+ the PIIX4 at the given address. VERY DANGEROUS! */
+static int force_addr;
+module_param (force_addr, int, 0);
+MODULE_PARM_DESC(force_addr,
+ "Forcibly enable the PIIX4 at the given address. "
+ "EXTREMELY DANGEROUS!");
+
+static int srvrworks_csb5_delay;
+static struct pci_driver piix4_driver;
+
+static const struct dmi_system_id piix4_dmi_blacklist[] = {
+ {
+ .ident = "Sapphire AM2RD790",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "SAPPHIRE Inc."),
+ DMI_MATCH(DMI_BOARD_NAME, "PC-AM2RD790"),
+ },
+ },
+ {
+ .ident = "DFI Lanparty UT 790FX",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "DFI Inc."),
+ DMI_MATCH(DMI_BOARD_NAME, "LP UT 790FX"),
+ },
+ },
+ { }
+};
+
+/* The IBM entry is in a separate table because we only check it
+ on Intel-based systems */
+static const struct dmi_system_id piix4_dmi_ibm[] = {
+ {
+ .ident = "IBM",
+ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "IBM"), },
+ },
+ { },
+};
+
+struct i2c_piix4_adapdata {
+ unsigned short smba;
+};
+
+static int piix4_setup(struct pci_dev *PIIX4_dev,
+ const struct pci_device_id *id)
+{
+ unsigned char temp;
+ unsigned short piix4_smba;
+
+ if ((PIIX4_dev->vendor == PCI_VENDOR_ID_SERVERWORKS) &&
+ (PIIX4_dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5))
+ srvrworks_csb5_delay = 1;
+
+ /* On some motherboards, it was reported that accessing the SMBus
+ caused severe hardware problems */
+ if (dmi_check_system(piix4_dmi_blacklist)) {
+ dev_err(&PIIX4_dev->dev,
+ "Accessing the SMBus on this system is unsafe!\n");
+ return -EPERM;
+ }
+
+ /* Don't access SMBus on IBM systems which get corrupted eeproms */
+ if (dmi_check_system(piix4_dmi_ibm) &&
+ PIIX4_dev->vendor == PCI_VENDOR_ID_INTEL) {
+ dev_err(&PIIX4_dev->dev, "IBM system detected; this module "
+ "may corrupt your serial eeprom! Refusing to load "
+ "module!\n");
+ return -EPERM;
+ }
+
+ /* Determine the address of the SMBus areas */
+ if (force_addr) {
+ piix4_smba = force_addr & 0xfff0;
+ force = 0;
+ } else {
+ pci_read_config_word(PIIX4_dev, SMBBA, &piix4_smba);
+ piix4_smba &= 0xfff0;
+ if(piix4_smba == 0) {
+ dev_err(&PIIX4_dev->dev, "SMBus base address "
+ "uninitialized - upgrade BIOS or use "
+ "force_addr=0xaddr\n");
+ return -ENODEV;
+ }
+ }
+
+ if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
+ return -ENODEV;
+
+ if (!request_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) {
+ dev_err(&PIIX4_dev->dev, "SMBus region 0x%x already in use!\n",
+ piix4_smba);
+ return -EBUSY;
+ }
+
+ pci_read_config_byte(PIIX4_dev, SMBHSTCFG, &temp);
+
+ /* If force_addr is set, we program the new address here. Just to make
+ sure, we disable the PIIX4 first. */
+ if (force_addr) {
+ pci_write_config_byte(PIIX4_dev, SMBHSTCFG, temp & 0xfe);
+ pci_write_config_word(PIIX4_dev, SMBBA, piix4_smba);
+ pci_write_config_byte(PIIX4_dev, SMBHSTCFG, temp | 0x01);
+ dev_info(&PIIX4_dev->dev, "WARNING: SMBus interface set to "
+ "new address %04x!\n", piix4_smba);
+ } else if ((temp & 1) == 0) {
+ if (force) {
+ /* This should never need to be done, but has been
+ * noted that many Dell machines have the SMBus
+ * interface on the PIIX4 disabled!? NOTE: This assumes
+ * I/O space and other allocations WERE done by the
+ * Bios! Don't complain if your hardware does weird
+ * things after enabling this. :') Check for Bios
+ * updates before resorting to this.
+ */
+ pci_write_config_byte(PIIX4_dev, SMBHSTCFG,
+ temp | 1);
+ dev_notice(&PIIX4_dev->dev,
+ "WARNING: SMBus interface has been FORCEFULLY ENABLED!\n");
+ } else {
+ dev_err(&PIIX4_dev->dev,
+ "SMBus Host Controller not enabled!\n");
+ release_region(piix4_smba, SMBIOSIZE);
+ return -ENODEV;
+ }
+ }
+
+ if (((temp & 0x0E) == 8) || ((temp & 0x0E) == 2))
+ dev_dbg(&PIIX4_dev->dev, "Using IRQ for SMBus\n");
+ else if ((temp & 0x0E) == 0)
+ dev_dbg(&PIIX4_dev->dev, "Using SMI# for SMBus\n");
+ else
+ dev_err(&PIIX4_dev->dev, "Illegal Interrupt configuration "
+ "(or code out of date)!\n");
+
+ pci_read_config_byte(PIIX4_dev, SMBREV, &temp);
+ dev_info(&PIIX4_dev->dev,
+ "SMBus Host Controller at 0x%x, revision %d\n",
+ piix4_smba, temp);
+
+ return piix4_smba;
+}
+
+static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
+ const struct pci_device_id *id, u8 aux)
+{
+ unsigned short piix4_smba;
+ unsigned short smba_idx = 0xcd6;
+ u8 smba_en_lo, smba_en_hi, smb_en, smb_en_status;
+ u8 i2ccfg, i2ccfg_offset = 0x10;
+
+ /* SB800 and later SMBus does not support forcing address */
+ if (force || force_addr) {
+ dev_err(&PIIX4_dev->dev, "SMBus does not support "
+ "forcing address!\n");
+ return -EINVAL;
+ }
+
+ /* Determine the address of the SMBus areas */
+ if ((PIIX4_dev->vendor == PCI_VENDOR_ID_AMD &&
+ PIIX4_dev->device == PCI_DEVICE_ID_AMD_HUDSON2_SMBUS &&
+ PIIX4_dev->revision >= 0x41) ||
+ (PIIX4_dev->vendor == PCI_VENDOR_ID_AMD &&
+ PIIX4_dev->device == 0x790b &&
+ PIIX4_dev->revision >= 0x49))
+ smb_en = 0x00;
+ else
+ smb_en = (aux) ? 0x28 : 0x2c;
+
+ if (!request_region(smba_idx, 2, "smba_idx")) {
+ dev_err(&PIIX4_dev->dev, "SMBus base address index region "
+ "0x%x already in use!\n", smba_idx);
+ return -EBUSY;
+ }
+ outb_p(smb_en, smba_idx);
+ smba_en_lo = inb_p(smba_idx + 1);
+ outb_p(smb_en + 1, smba_idx);
+ smba_en_hi = inb_p(smba_idx + 1);
+ release_region(smba_idx, 2);
+
+ if (!smb_en) {
+ smb_en_status = smba_en_lo & 0x10;
+ piix4_smba = smba_en_hi << 8;
+ if (aux)
+ piix4_smba |= 0x20;
+ } else {
+ smb_en_status = smba_en_lo & 0x01;
+ piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0;
+ }
+
+ if (!smb_en_status) {
+ dev_err(&PIIX4_dev->dev,
+ "SMBus Host Controller not enabled!\n");
+ return -ENODEV;
+ }
+
+ if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
+ return -ENODEV;
+
+ if (!request_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) {
+ dev_err(&PIIX4_dev->dev, "SMBus region 0x%x already in use!\n",
+ piix4_smba);
+ return -EBUSY;
+ }
+
+ /* Aux SMBus does not support IRQ information */
+ if (aux) {
+ dev_info(&PIIX4_dev->dev,
+ "Auxiliary SMBus Host Controller at 0x%x\n",
+ piix4_smba);
+ return piix4_smba;
+ }
+
+ /* Request the SMBus I2C bus config region */
+ if (!request_region(piix4_smba + i2ccfg_offset, 1, "i2ccfg")) {
+ dev_err(&PIIX4_dev->dev, "SMBus I2C bus config region "
+ "0x%x already in use!\n", piix4_smba + i2ccfg_offset);
+ release_region(piix4_smba, SMBIOSIZE);
+ return -EBUSY;
+ }
+ i2ccfg = inb_p(piix4_smba + i2ccfg_offset);
+ release_region(piix4_smba + i2ccfg_offset, 1);
+
+ if (i2ccfg & 1)
+ dev_dbg(&PIIX4_dev->dev, "Using IRQ for SMBus\n");
+ else
+ dev_dbg(&PIIX4_dev->dev, "Using SMI# for SMBus\n");
+
+ dev_info(&PIIX4_dev->dev,
+ "SMBus Host Controller at 0x%x, revision %d\n",
+ piix4_smba, i2ccfg >> 4);
+
+ return piix4_smba;
+}
+
+static int piix4_setup_aux(struct pci_dev *PIIX4_dev,
+ const struct pci_device_id *id,
+ unsigned short base_reg_addr)
+{
+ /* Set up auxiliary SMBus controllers found on some
+ * AMD chipsets e.g. SP5100 (SB700 derivative) */
+
+ unsigned short piix4_smba;
+
+ /* Read address of auxiliary SMBus controller */
+ pci_read_config_word(PIIX4_dev, base_reg_addr, &piix4_smba);
+ if ((piix4_smba & 1) == 0) {
+ dev_dbg(&PIIX4_dev->dev,
+ "Auxiliary SMBus controller not enabled\n");
+ return -ENODEV;
+ }
+
+ piix4_smba &= 0xfff0;
+ if (piix4_smba == 0) {
+ dev_dbg(&PIIX4_dev->dev,
+ "Auxiliary SMBus base address uninitialized\n");
+ return -ENODEV;
+ }
+
+ if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
+ return -ENODEV;
+
+ if (!request_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) {
+ dev_err(&PIIX4_dev->dev, "Auxiliary SMBus region 0x%x "
+ "already in use!\n", piix4_smba);
+ return -EBUSY;
+ }
+
+ dev_info(&PIIX4_dev->dev,
+ "Auxiliary SMBus Host Controller at 0x%x\n",
+ piix4_smba);
+
+ return piix4_smba;
+}
+
+static int piix4_transaction(struct i2c_adapter *piix4_adapter)
+{
+ struct i2c_piix4_adapdata *adapdata = i2c_get_adapdata(piix4_adapter);
+ unsigned short piix4_smba = adapdata->smba;
+ int temp;
+ int result = 0;
+ int timeout = 0;
+
+ dev_dbg(&piix4_adapter->dev, "Transaction (pre): CNT=%02x, CMD=%02x, "
+ "ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT),
+ inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
+ inb_p(SMBHSTDAT1));
+
+ /* Make sure the SMBus host is ready to start transmitting */
+ if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
+ dev_dbg(&piix4_adapter->dev, "SMBus busy (%02x). "
+ "Resetting...\n", temp);
+ outb_p(temp, SMBHSTSTS);
+ if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
+ dev_err(&piix4_adapter->dev, "Failed! (%02x)\n", temp);
+ return -EBUSY;
+ } else {
+ dev_dbg(&piix4_adapter->dev, "Successful!\n");
+ }
+ }
+
+ /* start the transaction by setting bit 6 */
+ outb_p(inb(SMBHSTCNT) | 0x040, SMBHSTCNT);
+
+ /* We will always wait for a fraction of a second! (See PIIX4 docs errata) */
+ if (srvrworks_csb5_delay) /* Extra delay for SERVERWORKS_CSB5 */
+ msleep(2);
+ else
+ msleep(1);
+
+ while ((++timeout < MAX_TIMEOUT) &&
+ ((temp = inb_p(SMBHSTSTS)) & 0x01))
+ msleep(1);
+
+ /* If the SMBus is still busy, we give up */
+ if (timeout == MAX_TIMEOUT) {
+ dev_err(&piix4_adapter->dev, "SMBus Timeout!\n");
+ result = -ETIMEDOUT;
+ }
+
+ if (temp & 0x10) {
+ result = -EIO;
+ dev_err(&piix4_adapter->dev, "Error: Failed bus transaction\n");
+ }
+
+ if (temp & 0x08) {
+ result = -EIO;
+ dev_dbg(&piix4_adapter->dev, "Bus collision! SMBus may be "
+ "locked until next hard reset. (sorry!)\n");
+ /* Clock stops and slave is stuck in mid-transmission */
+ }
+
+ if (temp & 0x04) {
+ result = -ENXIO;
+ dev_dbg(&piix4_adapter->dev, "Error: no response!\n");
+ }
+
+ if (inb_p(SMBHSTSTS) != 0x00)
+ outb_p(inb(SMBHSTSTS), SMBHSTSTS);
+
+ if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
+ dev_err(&piix4_adapter->dev, "Failed reset at end of "
+ "transaction (%02x)\n", temp);
+ }
+ dev_dbg(&piix4_adapter->dev, "Transaction (post): CNT=%02x, CMD=%02x, "
+ "ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT),
+ inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
+ inb_p(SMBHSTDAT1));
+ return result;
+}
+
+/* Return negative errno on error. */
+static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
+ unsigned short flags, char read_write,
+ u8 command, int size, union i2c_smbus_data * data)
+{
+ struct i2c_piix4_adapdata *adapdata = i2c_get_adapdata(adap);
+ unsigned short piix4_smba = adapdata->smba;
+ int i, len;
+ int status;
+
+ switch (size) {
+ case I2C_SMBUS_QUICK:
+ outb_p((addr << 1) | read_write,
+ SMBHSTADD);
+ size = PIIX4_QUICK;
+ break;
+ case I2C_SMBUS_BYTE:
+ outb_p((addr << 1) | read_write,
+ SMBHSTADD);
+ if (read_write == I2C_SMBUS_WRITE)
+ outb_p(command, SMBHSTCMD);
+ size = PIIX4_BYTE;
+ break;
+ case I2C_SMBUS_BYTE_DATA:
+ outb_p((addr << 1) | read_write,
+ SMBHSTADD);
+ outb_p(command, SMBHSTCMD);
+ if (read_write == I2C_SMBUS_WRITE)
+ outb_p(data->byte, SMBHSTDAT0);
+ size = PIIX4_BYTE_DATA;
+ break;
+ case I2C_SMBUS_WORD_DATA:
+ outb_p((addr << 1) | read_write,
+ SMBHSTADD);
+ outb_p(command, SMBHSTCMD);
+ if (read_write == I2C_SMBUS_WRITE) {
+ outb_p(data->word & 0xff, SMBHSTDAT0);
+ outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
+ }
+ size = PIIX4_WORD_DATA;
+ break;
+ case I2C_SMBUS_BLOCK_DATA:
+ outb_p((addr << 1) | read_write,
+ SMBHSTADD);
+ outb_p(command, SMBHSTCMD);
+ if (read_write == I2C_SMBUS_WRITE) {
+ len = data->block[0];
+ if (len == 0 || len > I2C_SMBUS_BLOCK_MAX)
+ return -EINVAL;
+ outb_p(len, SMBHSTDAT0);
+ i = inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */
+ for (i = 1; i <= len; i++)
+ outb_p(data->block[i], SMBBLKDAT);
+ }
+ size = PIIX4_BLOCK_DATA;
+ break;
+ default:
+ dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
+ return -EOPNOTSUPP;
+ }
+
+ outb_p((size & 0x1C) + (ENABLE_INT9 & 1), SMBHSTCNT);
+
+ status = piix4_transaction(adap);
+ if (status)
+ return status;
+
+ if ((read_write == I2C_SMBUS_WRITE) || (size == PIIX4_QUICK))
+ return 0;
+
+
+ switch (size) {
+ case PIIX4_BYTE:
+ case PIIX4_BYTE_DATA:
+ data->byte = inb_p(SMBHSTDAT0);
+ break;
+ case PIIX4_WORD_DATA:
+ data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
+ break;
+ case PIIX4_BLOCK_DATA:
+ data->block[0] = inb_p(SMBHSTDAT0);
+ if (data->block[0] == 0 || data->block[0] > I2C_SMBUS_BLOCK_MAX)
+ return -EPROTO;
+ i = inb_p(SMBHSTCNT); /* Reset SMBBLKDAT */
+ for (i = 1; i <= data->block[0]; i++)
+ data->block[i] = inb_p(SMBBLKDAT);
+ break;
+ }
+ return 0;
+}
+
+static u32 piix4_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
+ I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
+ I2C_FUNC_SMBUS_BLOCK_DATA;
+}
+
+static const struct i2c_algorithm smbus_algorithm = {
+ .smbus_xfer = piix4_access,
+ .functionality = piix4_func,
+};
+
+static const struct pci_device_id piix4_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443MX_3) },
+ { PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_3) },
+ { PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_SMBUS) },
+ { PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_SMBUS) },
+ { PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS) },
+ { PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS) },
+ { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SMBUS) },
+ { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x790b) },
+ { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
+ PCI_DEVICE_ID_SERVERWORKS_OSB4) },
+ { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
+ PCI_DEVICE_ID_SERVERWORKS_CSB5) },
+ { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
+ PCI_DEVICE_ID_SERVERWORKS_CSB6) },
+ { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
+ PCI_DEVICE_ID_SERVERWORKS_HT1000SB) },
+ { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS,
+ PCI_DEVICE_ID_SERVERWORKS_HT1100LD) },
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE (pci, piix4_ids);
+
+static struct i2c_adapter *piix4_main_adapter;
+static struct i2c_adapter *piix4_aux_adapter;
+
+static int piix4_add_adapter(struct pci_dev *dev, unsigned short smba,
+ struct i2c_adapter **padap)
+{
+ struct i2c_adapter *adap;
+ struct i2c_piix4_adapdata *adapdata;
+ int retval;
+
+ adap = kzalloc(sizeof(*adap), GFP_KERNEL);
+ if (adap == NULL) {
+ release_region(smba, SMBIOSIZE);
+ return -ENOMEM;
+ }
+
+ adap->owner = THIS_MODULE;
+ adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
+ adap->algo = &smbus_algorithm;
+
+ adapdata = kzalloc(sizeof(*adapdata), GFP_KERNEL);
+ if (adapdata == NULL) {
+ kfree(adap);
+ release_region(smba, SMBIOSIZE);
+ return -ENOMEM;
+ }
+
+ adapdata->smba = smba;
+
+ /* set up the sysfs linkage to our parent device */
+ adap->dev.parent = &dev->dev;
+
+ snprintf(adap->name, sizeof(adap->name),
+ "SMBus PIIX4 adapter at %04x", smba);
+
+ i2c_set_adapdata(adap, adapdata);
+
+ retval = i2c_add_adapter(adap);
+ if (retval) {
+ dev_err(&dev->dev, "Couldn't register adapter!\n");
+ kfree(adapdata);
+ kfree(adap);
+ release_region(smba, SMBIOSIZE);
+ return retval;
+ }
+
+ *padap = adap;
+ return 0;
+}
+
+static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ int retval;
+
+ if ((dev->vendor == PCI_VENDOR_ID_ATI &&
+ dev->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS &&
+ dev->revision >= 0x40) ||
+ dev->vendor == PCI_VENDOR_ID_AMD)
+ /* base address location etc changed in SB800 */
+ retval = piix4_setup_sb800(dev, id, 0);
+ else
+ retval = piix4_setup(dev, id);
+
+ /* If no main SMBus found, give up */
+ if (retval < 0)
+ return retval;
+
+ /* Try to register main SMBus adapter, give up if we can't */
+ retval = piix4_add_adapter(dev, retval, &piix4_main_adapter);
+ if (retval < 0)
+ return retval;
+
+ /* Check for auxiliary SMBus on some AMD chipsets */
+ retval = -ENODEV;
+
+ if (dev->vendor == PCI_VENDOR_ID_ATI &&
+ dev->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS) {
+ if (dev->revision < 0x40) {
+ retval = piix4_setup_aux(dev, id, 0x58);
+ } else {
+ /* SB800 added aux bus too */
+ retval = piix4_setup_sb800(dev, id, 1);
+ }
+ }
+
+ if (dev->vendor == PCI_VENDOR_ID_AMD &&
+ dev->device == PCI_DEVICE_ID_AMD_HUDSON2_SMBUS) {
+ retval = piix4_setup_sb800(dev, id, 1);
+ }
+
+ if (retval > 0) {
+ /* Try to add the aux adapter if it exists,
+ * piix4_add_adapter will clean up if this fails */
+ piix4_add_adapter(dev, retval, &piix4_aux_adapter);
+ }
+
+ return 0;
+}
+
+static void piix4_adap_remove(struct i2c_adapter *adap)
+{
+ struct i2c_piix4_adapdata *adapdata = i2c_get_adapdata(adap);
+
+ if (adapdata->smba) {
+ i2c_del_adapter(adap);
+ release_region(adapdata->smba, SMBIOSIZE);
+ kfree(adapdata);
+ kfree(adap);
+ }
+}
+
+static void piix4_remove(struct pci_dev *dev)
+{
+ if (piix4_main_adapter) {
+ piix4_adap_remove(piix4_main_adapter);
+ piix4_main_adapter = NULL;
+ }
+
+ if (piix4_aux_adapter) {
+ piix4_adap_remove(piix4_aux_adapter);
+ piix4_aux_adapter = NULL;
+ }
+}
+
+static struct pci_driver piix4_driver = {
+ .name = "piix4_smbus",
+ .id_table = piix4_ids,
+ .probe = piix4_probe,
+ .remove = piix4_remove,
+};
+
+module_pci_driver(piix4_driver);
+
+MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
+ "Philip Edelbrock <phil@netroedge.com>");
+MODULE_DESCRIPTION("PIIX4 SMBus driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff