Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 532 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-ali15x3.c b/drivers/i2c/busses/i2c-ali15x3.c
new file mode 100644
index 00000000000..5bd6a4a77c1
--- /dev/null
+++ b/drivers/i2c/busses/i2c-ali15x3.c
@@ -0,0 +1,532 @@
+/*
+    ali15x3.c - Part of lm_sensors, Linux kernel modules for hardware
+              monitoring
+    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/config.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <asm/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 = 0;
+module_param(force_addr, ushort, 0);
+MODULE_PARM_DESC(force_addr,
+                 "Initialize the base address of the i2c controller");
+
+static unsigned short ali15x3_smba = 0;
+
+static int 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 (!request_region(ali15x3_smba, ALI15X3_SMB_IOSIZE, "ali15x3-smb")) {
+                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 -1;
+                }
+        } 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 = -1;
+                dev_err(&adap->dev, "SMBus Timeout!\n");
+        }
+
+        if (temp & ALI15X3_STS_TERM) {
+                result = -1;
+                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 reponse is the usual case so don't
+          do a printk.
+          This means that bus collisions go unreported.
+        */
+        if (temp & ALI15X3_STS_COLL) {
+                result = -1;
+                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 = -1;
+                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 -1 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_PROC_CALL:
+                dev_err(&adap->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
+                return -1;
+        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;
+        }
+
+        outb_p(size, SMBHSTCNT);        /* output command */
+
+        if (ali15x3_transaction(adap))  /* Error in transaction */
+                return -1;
+
+        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 struct i2c_algorithm smbus_algorithm = {
+        .name           = "Non-I2C SMBus adapter",
+        .id             = I2C_ALGO_SMBUS,
+        .smbus_xfer     = ali15x3_access,
+        .functionality  = ali15x3_func,
+};
+
+static struct i2c_adapter ali15x3_adapter = {
+        .owner          = THIS_MODULE,
+        .class          = I2C_CLASS_HWMON,
+        .algo           = &smbus_algorithm,
+        .name           = "unset",
+};
+
+static struct pci_device_id 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 driverfs linkage to our parent device */
+        ali15x3_adapter.dev.parent = &dev->dev;
+
+        snprintf(ali15x3_adapter.name, I2C_NAME_SIZE,
+                "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);