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-rw-r--r--ANDROID_3.4.5/drivers/i2c/busses/i2c-ali15x3.c533
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diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-ali15x3.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-ali15x3.c
deleted file mode 100644
index 087ea9ca..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-ali15x3.c
+++ /dev/null
@@ -1,533 +0,0 @@
-/*
- Copyright (c) 1999 Frodo Looijaard <frodol@dds.nl> and
- Philip Edelbrock <phil@netroedge.com> and
- Mark D. Studebaker <mdsxyz123@yahoo.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.
-*/
-
-/*
- This is the driver for the SMB Host controller on
- Acer Labs Inc. (ALI) M1541 and M1543C South Bridges.
-
- The M1543C is a South bridge for desktop systems.
- The M1533 is a South bridge for portable systems.
- They are part of the following ALI chipsets:
- "Aladdin Pro 2": Includes the M1621 Slot 1 North bridge
- with AGP and 100MHz CPU Front Side bus
- "Aladdin V": Includes the M1541 Socket 7 North bridge
- with AGP and 100MHz CPU Front Side bus
- "Aladdin IV": Includes the M1541 Socket 7 North bridge
- with host bus up to 83.3 MHz.
- For an overview of these chips see http://www.acerlabs.com
-
- The M1533/M1543C devices appear as FOUR separate devices
- on the PCI bus. An output of lspci will show something similar
- to the following:
-
- 00:02.0 USB Controller: Acer Laboratories Inc. M5237
- 00:03.0 Bridge: Acer Laboratories Inc. M7101
- 00:07.0 ISA bridge: Acer Laboratories Inc. M1533
- 00:0f.0 IDE interface: Acer Laboratories Inc. M5229
-
- The SMB controller is part of the 7101 device, which is an
- ACPI-compliant Power Management Unit (PMU).
-
- The whole 7101 device has to be enabled for the SMB to work.
- You can't just enable the SMB alone.
- The SMB and the ACPI have separate I/O spaces.
- We make sure that the SMB is enabled. We leave the ACPI alone.
-
- This driver controls the SMB Host only.
- The SMB Slave controller on the M15X3 is not enabled.
-
- This driver does not use interrupts.
-*/
-
-/* Note: we assume there can only be one ALI15X3, with one SMBus interface */
-
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/kernel.h>
-#include <linux/stddef.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/i2c.h>
-#include <linux/init.h>
-#include <linux/acpi.h>
-#include <linux/io.h>
-
-/* ALI15X3 SMBus address offsets */
-#define SMBHSTSTS (0 + ali15x3_smba)
-#define SMBHSTCNT (1 + ali15x3_smba)
-#define SMBHSTSTART (2 + ali15x3_smba)
-#define SMBHSTCMD (7 + ali15x3_smba)
-#define SMBHSTADD (3 + ali15x3_smba)
-#define SMBHSTDAT0 (4 + ali15x3_smba)
-#define SMBHSTDAT1 (5 + ali15x3_smba)
-#define SMBBLKDAT (6 + ali15x3_smba)
-
-/* PCI Address Constants */
-#define SMBCOM 0x004
-#define SMBBA 0x014
-#define SMBATPC 0x05B /* used to unlock xxxBA registers */
-#define SMBHSTCFG 0x0E0
-#define SMBSLVC 0x0E1
-#define SMBCLK 0x0E2
-#define SMBREV 0x008
-
-/* Other settings */
-#define MAX_TIMEOUT 200 /* times 1/100 sec */
-#define ALI15X3_SMB_IOSIZE 32
-
-/* this is what the Award 1004 BIOS sets them to on a ASUS P5A MB.
- We don't use these here. If the bases aren't set to some value we
- tell user to upgrade BIOS and we fail.
-*/
-#define ALI15X3_SMB_DEFAULTBASE 0xE800
-
-/* ALI15X3 address lock bits */
-#define ALI15X3_LOCK 0x06
-
-/* ALI15X3 command constants */
-#define ALI15X3_ABORT 0x02
-#define ALI15X3_T_OUT 0x04
-#define ALI15X3_QUICK 0x00
-#define ALI15X3_BYTE 0x10
-#define ALI15X3_BYTE_DATA 0x20
-#define ALI15X3_WORD_DATA 0x30
-#define ALI15X3_BLOCK_DATA 0x40
-#define ALI15X3_BLOCK_CLR 0x80
-
-/* ALI15X3 status register bits */
-#define ALI15X3_STS_IDLE 0x04
-#define ALI15X3_STS_BUSY 0x08
-#define ALI15X3_STS_DONE 0x10
-#define ALI15X3_STS_DEV 0x20 /* device error */
-#define ALI15X3_STS_COLL 0x40 /* collision or no response */
-#define ALI15X3_STS_TERM 0x80 /* terminated by abort */
-#define ALI15X3_STS_ERR 0xE0 /* all the bad error bits */
-
-
-/* If force_addr is set to anything different from 0, we forcibly enable
- the device at the given address. */
-static u16 force_addr;
-module_param(force_addr, ushort, 0);
-MODULE_PARM_DESC(force_addr,
- "Initialize the base address of the i2c controller");
-
-static struct pci_driver ali15x3_driver;
-static unsigned short ali15x3_smba;
-
-static int __devinit ali15x3_setup(struct pci_dev *ALI15X3_dev)
-{
- u16 a;
- unsigned char temp;
-
- /* Check the following things:
- - SMB I/O address is initialized
- - Device is enabled
- - We can use the addresses
- */
-
- /* Unlock the register.
- The data sheet says that the address registers are read-only
- if the lock bits are 1, but in fact the address registers
- are zero unless you clear the lock bits.
- */
- pci_read_config_byte(ALI15X3_dev, SMBATPC, &temp);
- if (temp & ALI15X3_LOCK) {
- temp &= ~ALI15X3_LOCK;
- pci_write_config_byte(ALI15X3_dev, SMBATPC, temp);
- }
-
- /* Determine the address of the SMBus area */
- pci_read_config_word(ALI15X3_dev, SMBBA, &ali15x3_smba);
- ali15x3_smba &= (0xffff & ~(ALI15X3_SMB_IOSIZE - 1));
- if (ali15x3_smba == 0 && force_addr == 0) {
- dev_err(&ALI15X3_dev->dev, "ALI15X3_smb region uninitialized "
- "- upgrade BIOS or use force_addr=0xaddr\n");
- return -ENODEV;
- }
-
- if(force_addr)
- ali15x3_smba = force_addr & ~(ALI15X3_SMB_IOSIZE - 1);
-
- if (acpi_check_region(ali15x3_smba, ALI15X3_SMB_IOSIZE,
- ali15x3_driver.name))
- return -EBUSY;
-
- if (!request_region(ali15x3_smba, ALI15X3_SMB_IOSIZE,
- ali15x3_driver.name)) {
- dev_err(&ALI15X3_dev->dev,
- "ALI15X3_smb region 0x%x already in use!\n",
- ali15x3_smba);
- return -ENODEV;
- }
-
- if(force_addr) {
- dev_info(&ALI15X3_dev->dev, "forcing ISA address 0x%04X\n",
- ali15x3_smba);
- if (PCIBIOS_SUCCESSFUL != pci_write_config_word(ALI15X3_dev,
- SMBBA,
- ali15x3_smba))
- goto error;
- if (PCIBIOS_SUCCESSFUL != pci_read_config_word(ALI15X3_dev,
- SMBBA, &a))
- goto error;
- if ((a & ~(ALI15X3_SMB_IOSIZE - 1)) != ali15x3_smba) {
- /* make sure it works */
- dev_err(&ALI15X3_dev->dev,
- "force address failed - not supported?\n");
- goto error;
- }
- }
- /* check if whole device is enabled */
- pci_read_config_byte(ALI15X3_dev, SMBCOM, &temp);
- if ((temp & 1) == 0) {
- dev_info(&ALI15X3_dev->dev, "enabling SMBus device\n");
- pci_write_config_byte(ALI15X3_dev, SMBCOM, temp | 0x01);
- }
-
- /* Is SMB Host controller enabled? */
- pci_read_config_byte(ALI15X3_dev, SMBHSTCFG, &temp);
- if ((temp & 1) == 0) {
- dev_info(&ALI15X3_dev->dev, "enabling SMBus controller\n");
- pci_write_config_byte(ALI15X3_dev, SMBHSTCFG, temp | 0x01);
- }
-
- /* set SMB clock to 74KHz as recommended in data sheet */
- pci_write_config_byte(ALI15X3_dev, SMBCLK, 0x20);
-
- /*
- The interrupt routing for SMB is set up in register 0x77 in the
- 1533 ISA Bridge device, NOT in the 7101 device.
- Don't bother with finding the 1533 device and reading the register.
- if ((....... & 0x0F) == 1)
- dev_dbg(&ALI15X3_dev->dev, "ALI15X3 using Interrupt 9 for SMBus.\n");
- */
- pci_read_config_byte(ALI15X3_dev, SMBREV, &temp);
- dev_dbg(&ALI15X3_dev->dev, "SMBREV = 0x%X\n", temp);
- dev_dbg(&ALI15X3_dev->dev, "iALI15X3_smba = 0x%X\n", ali15x3_smba);
-
- return 0;
-error:
- release_region(ali15x3_smba, ALI15X3_SMB_IOSIZE);
- return -ENODEV;
-}
-
-/* Another internally used function */
-static int ali15x3_transaction(struct i2c_adapter *adap)
-{
- int temp;
- int result = 0;
- int timeout = 0;
-
- dev_dbg(&adap->dev, "Transaction (pre): STS=%02x, CNT=%02x, CMD=%02x, "
- "ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTSTS),
- inb_p(SMBHSTCNT), inb_p(SMBHSTCMD), inb_p(SMBHSTADD),
- inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1));
-
- /* get status */
- temp = inb_p(SMBHSTSTS);
-
- /* Make sure the SMBus host is ready to start transmitting */
- /* Check the busy bit first */
- if (temp & ALI15X3_STS_BUSY) {
- /*
- If the host controller is still busy, it may have timed out in the
- previous transaction, resulting in a "SMBus Timeout" Dev.
- I've tried the following to reset a stuck busy bit.
- 1. Reset the controller with an ABORT command.
- (this doesn't seem to clear the controller if an external
- device is hung)
- 2. Reset the controller and the other SMBus devices with a
- T_OUT command. (this clears the host busy bit if an
- external device is hung, but it comes back upon a new access
- to a device)
- 3. Disable and reenable the controller in SMBHSTCFG
- Worst case, nothing seems to work except power reset.
- */
- /* Abort - reset the host controller */
- /*
- Try resetting entire SMB bus, including other devices -
- This may not work either - it clears the BUSY bit but
- then the BUSY bit may come back on when you try and use the chip again.
- If that's the case you are stuck.
- */
- dev_info(&adap->dev, "Resetting entire SMB Bus to "
- "clear busy condition (%02x)\n", temp);
- outb_p(ALI15X3_T_OUT, SMBHSTCNT);
- temp = inb_p(SMBHSTSTS);
- }
-
- /* now check the error bits and the busy bit */
- if (temp & (ALI15X3_STS_ERR | ALI15X3_STS_BUSY)) {
- /* do a clear-on-write */
- outb_p(0xFF, SMBHSTSTS);
- if ((temp = inb_p(SMBHSTSTS)) &
- (ALI15X3_STS_ERR | ALI15X3_STS_BUSY)) {
- /* this is probably going to be correctable only by a power reset
- as one of the bits now appears to be stuck */
- /* This may be a bus or device with electrical problems. */
- dev_err(&adap->dev, "SMBus reset failed! (0x%02x) - "
- "controller or device on bus is probably hung\n",
- temp);
- return -EBUSY;
- }
- } else {
- /* check and clear done bit */
- if (temp & ALI15X3_STS_DONE) {
- outb_p(temp, SMBHSTSTS);
- }
- }
-
- /* start the transaction by writing anything to the start register */
- outb_p(0xFF, SMBHSTSTART);
-
- /* We will always wait for a fraction of a second! */
- timeout = 0;
- do {
- msleep(1);
- temp = inb_p(SMBHSTSTS);
- } while ((!(temp & (ALI15X3_STS_ERR | ALI15X3_STS_DONE)))
- && (timeout++ < MAX_TIMEOUT));
-
- /* If the SMBus is still busy, we give up */
- if (timeout > MAX_TIMEOUT) {
- result = -ETIMEDOUT;
- dev_err(&adap->dev, "SMBus Timeout!\n");
- }
-
- if (temp & ALI15X3_STS_TERM) {
- result = -EIO;
- dev_dbg(&adap->dev, "Error: Failed bus transaction\n");
- }
-
- /*
- Unfortunately the ALI SMB controller maps "no response" and "bus
- collision" into a single bit. No response is the usual case so don't
- do a printk.
- This means that bus collisions go unreported.
- */
- if (temp & ALI15X3_STS_COLL) {
- result = -ENXIO;
- dev_dbg(&adap->dev,
- "Error: no response or bus collision ADD=%02x\n",
- inb_p(SMBHSTADD));
- }
-
- /* haven't ever seen this */
- if (temp & ALI15X3_STS_DEV) {
- result = -EIO;
- dev_err(&adap->dev, "Error: device error\n");
- }
- dev_dbg(&adap->dev, "Transaction (post): STS=%02x, CNT=%02x, CMD=%02x, "
- "ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTSTS),
- inb_p(SMBHSTCNT), inb_p(SMBHSTCMD), inb_p(SMBHSTADD),
- inb_p(SMBHSTDAT0), inb_p(SMBHSTDAT1));
- return result;
-}
-
-/* Return negative errno on error. */
-static s32 ali15x3_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 temp;
- int timeout;
-
- /* clear all the bits (clear-on-write) */
- outb_p(0xFF, SMBHSTSTS);
- /* make sure SMBus is idle */
- temp = inb_p(SMBHSTSTS);
- for (timeout = 0;
- (timeout < MAX_TIMEOUT) && !(temp & ALI15X3_STS_IDLE);
- timeout++) {
- msleep(1);
- temp = inb_p(SMBHSTSTS);
- }
- if (timeout >= MAX_TIMEOUT) {
- dev_err(&adap->dev, "Idle wait Timeout! STS=0x%02x\n", temp);
- }
-
- switch (size) {
- case I2C_SMBUS_QUICK:
- outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMBHSTADD);
- size = ALI15X3_QUICK;
- break;
- case I2C_SMBUS_BYTE:
- outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMBHSTADD);
- if (read_write == I2C_SMBUS_WRITE)
- outb_p(command, SMBHSTCMD);
- size = ALI15X3_BYTE;
- break;
- case I2C_SMBUS_BYTE_DATA:
- outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMBHSTADD);
- outb_p(command, SMBHSTCMD);
- if (read_write == I2C_SMBUS_WRITE)
- outb_p(data->byte, SMBHSTDAT0);
- size = ALI15X3_BYTE_DATA;
- break;
- case I2C_SMBUS_WORD_DATA:
- outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- 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 = ALI15X3_WORD_DATA;
- break;
- case I2C_SMBUS_BLOCK_DATA:
- outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
- SMBHSTADD);
- outb_p(command, SMBHSTCMD);
- if (read_write == I2C_SMBUS_WRITE) {
- len = data->block[0];
- if (len < 0) {
- len = 0;
- data->block[0] = len;
- }
- if (len > 32) {
- len = 32;
- data->block[0] = len;
- }
- outb_p(len, SMBHSTDAT0);
- /* Reset SMBBLKDAT */
- outb_p(inb_p(SMBHSTCNT) | ALI15X3_BLOCK_CLR, SMBHSTCNT);
- for (i = 1; i <= len; i++)
- outb_p(data->block[i], SMBBLKDAT);
- }
- size = ALI15X3_BLOCK_DATA;
- break;
- default:
- dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
- return -EOPNOTSUPP;
- }
-
- outb_p(size, SMBHSTCNT); /* output command */
-
- temp = ali15x3_transaction(adap);
- if (temp)
- return temp;
-
- if ((read_write == I2C_SMBUS_WRITE) || (size == ALI15X3_QUICK))
- return 0;
-
-
- switch (size) {
- case ALI15X3_BYTE: /* Result put in SMBHSTDAT0 */
- data->byte = inb_p(SMBHSTDAT0);
- break;
- case ALI15X3_BYTE_DATA:
- data->byte = inb_p(SMBHSTDAT0);
- break;
- case ALI15X3_WORD_DATA:
- data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
- break;
- case ALI15X3_BLOCK_DATA:
- len = inb_p(SMBHSTDAT0);
- if (len > 32)
- len = 32;
- data->block[0] = len;
- /* Reset SMBBLKDAT */
- outb_p(inb_p(SMBHSTCNT) | ALI15X3_BLOCK_CLR, SMBHSTCNT);
- for (i = 1; i <= data->block[0]; i++) {
- data->block[i] = inb_p(SMBBLKDAT);
- dev_dbg(&adap->dev, "Blk: len=%d, i=%d, data=%02x\n",
- len, i, data->block[i]);
- }
- break;
- }
- return 0;
-}
-
-static u32 ali15x3_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 = ali15x3_access,
- .functionality = ali15x3_func,
-};
-
-static struct i2c_adapter ali15x3_adapter = {
- .owner = THIS_MODULE,
- .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
- .algo = &smbus_algorithm,
-};
-
-static DEFINE_PCI_DEVICE_TABLE(ali15x3_ids) = {
- { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101) },
- { 0, }
-};
-
-MODULE_DEVICE_TABLE (pci, ali15x3_ids);
-
-static int __devinit ali15x3_probe(struct pci_dev *dev, const struct pci_device_id *id)
-{
- if (ali15x3_setup(dev)) {
- dev_err(&dev->dev,
- "ALI15X3 not detected, module not inserted.\n");
- return -ENODEV;
- }
-
- /* set up the sysfs linkage to our parent device */
- ali15x3_adapter.dev.parent = &dev->dev;
-
- snprintf(ali15x3_adapter.name, sizeof(ali15x3_adapter.name),
- "SMBus ALI15X3 adapter at %04x", ali15x3_smba);
- return i2c_add_adapter(&ali15x3_adapter);
-}
-
-static void __devexit ali15x3_remove(struct pci_dev *dev)
-{
- i2c_del_adapter(&ali15x3_adapter);
- release_region(ali15x3_smba, ALI15X3_SMB_IOSIZE);
-}
-
-static struct pci_driver ali15x3_driver = {
- .name = "ali15x3_smbus",
- .id_table = ali15x3_ids,
- .probe = ali15x3_probe,
- .remove = __devexit_p(ali15x3_remove),
-};
-
-static int __init i2c_ali15x3_init(void)
-{
- return pci_register_driver(&ali15x3_driver);
-}
-
-static void __exit i2c_ali15x3_exit(void)
-{
- pci_unregister_driver(&ali15x3_driver);
-}
-
-MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl>, "
- "Philip Edelbrock <phil@netroedge.com>, "
- "and Mark D. Studebaker <mdsxyz123@yahoo.com>");
-MODULE_DESCRIPTION("ALI15X3 SMBus driver");
-MODULE_LICENSE("GPL");
-
-module_init(i2c_ali15x3_init);
-module_exit(i2c_ali15x3_exit);
generated by cgit (git 2.34.1) at 2025-03-30 20:24:00 +0000