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Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-piix4.c')
-rw-r--r--ANDROID_3.4.5/drivers/i2c/busses/i2c-piix4.c563
1 files changed, 0 insertions, 563 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-piix4.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-piix4.c
deleted file mode 100644
index c14d48dd..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-piix4.c
+++ /dev/null
@@ -1,563 +0,0 @@
-/*
- 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.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/*
- Supports:
- Intel PIIX4, 440MX
- Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100
- ATI IXP200, IXP300, IXP400, SB600, SB700, SB800
- AMD Hudson-2
- SMSC Victory66
-
- Note: we assume there can only be one device, with one SMBus interface.
-*/
-
-#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/init.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 unsigned short piix4_smba;
-static int srvrworks_csb5_delay;
-static struct pci_driver piix4_driver;
-static struct i2c_adapter piix4_adapter;
-
-static struct dmi_system_id __devinitdata 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 struct dmi_system_id __devinitdata piix4_dmi_ibm[] = {
- {
- .ident = "IBM",
- .matches = { DMI_MATCH(DMI_SYS_VENDOR, "IBM"), },
- },
- { },
-};
-
-static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
- const struct pci_device_id *id)
-{
- unsigned char temp;
-
- 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_printk(KERN_NOTICE, &PIIX4_dev->dev,
- "WARNING: SMBus interface has been "
- "FORCEFULLY ENABLED!\n");
- } else {
- dev_err(&PIIX4_dev->dev,
- "Host SMBus controller not enabled!\n");
- release_region(piix4_smba, SMBIOSIZE);
- piix4_smba = 0;
- return -ENODEV;
- }
- }
-
- if (((temp & 0x0E) == 8) || ((temp & 0x0E) == 2))
- dev_dbg(&PIIX4_dev->dev, "Using Interrupt 9 for SMBus.\n");
- else if ((temp & 0x0E) == 0)
- dev_dbg(&PIIX4_dev->dev, "Using Interrupt 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 0;
-}
-
-static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev,
- const struct pci_device_id *id)
-{
- unsigned short smba_idx = 0xcd6;
- u8 smba_en_lo, smba_en_hi, i2ccfg, i2ccfg_offset = 0x10, smb_en = 0x2c;
-
- /* 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 (!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 ((smba_en_lo & 1) == 0) {
- dev_err(&PIIX4_dev->dev,
- "Host SMBus controller not enabled!\n");
- return -ENODEV;
- }
-
- piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0;
- 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;
- }
-
- /* 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);
- piix4_smba = 0;
- 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 0;
-}
-
-static int piix4_transaction(void)
-{
- 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)
-{
- 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();
- 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 struct i2c_adapter piix4_adapter = {
- .owner = THIS_MODULE,
- .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
- .algo = &smbus_algorithm,
-};
-
-static DEFINE_PCI_DEVICE_TABLE(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_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 int __devinit 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);
- else
- retval = piix4_setup(dev, id);
-
- if (retval)
- return retval;
-
- /* set up the sysfs linkage to our parent device */
- piix4_adapter.dev.parent = &dev->dev;
-
- snprintf(piix4_adapter.name, sizeof(piix4_adapter.name),
- "SMBus PIIX4 adapter at %04x", piix4_smba);
-
- if ((retval = i2c_add_adapter(&piix4_adapter))) {
- dev_err(&dev->dev, "Couldn't register adapter!\n");
- release_region(piix4_smba, SMBIOSIZE);
- piix4_smba = 0;
- }
-
- return retval;
-}
-
-static void __devexit piix4_remove(struct pci_dev *dev)
-{
- if (piix4_smba) {
- i2c_del_adapter(&piix4_adapter);
- release_region(piix4_smba, SMBIOSIZE);
- piix4_smba = 0;
- }
-}
-
-static struct pci_driver piix4_driver = {
- .name = "piix4_smbus",
- .id_table = piix4_ids,
- .probe = piix4_probe,
- .remove = __devexit_p(piix4_remove),
-};
-
-static int __init i2c_piix4_init(void)
-{
- return pci_register_driver(&piix4_driver);
-}
-
-static void __exit i2c_piix4_exit(void)
-{
- pci_unregister_driver(&piix4_driver);
-}
-
-MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
- "Philip Edelbrock <phil@netroedge.com>");
-MODULE_DESCRIPTION("PIIX4 SMBus driver");
-MODULE_LICENSE("GPL");
-
-module_init(i2c_piix4_init);
-module_exit(i2c_piix4_exit);
generated by cgit (git 2.34.1) at 2025-03-30 20:11:38 +0000