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Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/busses/i2c-sis630.c')
-rw-r--r--ANDROID_3.4.5/drivers/i2c/busses/i2c-sis630.c533
1 files changed, 0 insertions, 533 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-sis630.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-sis630.c
deleted file mode 100644
index 15cf78f6..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-sis630.c
+++ /dev/null
@@ -1,533 +0,0 @@
-/*
- Copyright (c) 2002,2003 Alexander Malysh <amalysh@web.de>
-
- 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.
-*/
-
-/*
- Changes:
- 24.08.2002
- Fixed the typo in sis630_access (Thanks to Mark M. Hoffman)
- Changed sis630_transaction.(Thanks to Mark M. Hoffman)
- 18.09.2002
- Added SIS730 as supported.
- 21.09.2002
- Added high_clock module option.If this option is set
- used Host Master Clock 56KHz (default 14KHz).For now we save old Host
- Master Clock and after transaction completed restore (otherwise
- it's confuse BIOS and hung Machine).
- 24.09.2002
- Fixed typo in sis630_access
- Fixed logical error by restoring of Host Master Clock
- 31.07.2003
- Added block data read/write support.
-*/
-
-/*
- Status: beta
-
- Supports:
- SIS 630
- SIS 730
-
- Note: we assume there can only be one device, with one SMBus interface.
-*/
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/acpi.h>
-#include <linux/io.h>
-
-/* SIS630 SMBus registers */
-#define SMB_STS 0x80 /* status */
-#define SMB_EN 0x81 /* status enable */
-#define SMB_CNT 0x82
-#define SMBHOST_CNT 0x83
-#define SMB_ADDR 0x84
-#define SMB_CMD 0x85
-#define SMB_PCOUNT 0x86 /* processed count */
-#define SMB_COUNT 0x87
-#define SMB_BYTE 0x88 /* ~0x8F data byte field */
-#define SMBDEV_ADDR 0x90
-#define SMB_DB0 0x91
-#define SMB_DB1 0x92
-#define SMB_SAA 0x93
-
-/* register count for request_region */
-#define SIS630_SMB_IOREGION 20
-
-/* PCI address constants */
-/* acpi base address register */
-#define SIS630_ACPI_BASE_REG 0x74
-/* bios control register */
-#define SIS630_BIOS_CTL_REG 0x40
-
-/* Other settings */
-#define MAX_TIMEOUT 500
-
-/* SIS630 constants */
-#define SIS630_QUICK 0x00
-#define SIS630_BYTE 0x01
-#define SIS630_BYTE_DATA 0x02
-#define SIS630_WORD_DATA 0x03
-#define SIS630_PCALL 0x04
-#define SIS630_BLOCK_DATA 0x05
-
-static struct pci_driver sis630_driver;
-
-/* insmod parameters */
-static bool high_clock;
-static bool force;
-module_param(high_clock, bool, 0);
-MODULE_PARM_DESC(high_clock, "Set Host Master Clock to 56KHz (default 14KHz).");
-module_param(force, bool, 0);
-MODULE_PARM_DESC(force, "Forcibly enable the SIS630. DANGEROUS!");
-
-/* acpi base address */
-static unsigned short acpi_base;
-
-/* supported chips */
-static int supported[] = {
- PCI_DEVICE_ID_SI_630,
- PCI_DEVICE_ID_SI_730,
- 0 /* terminates the list */
-};
-
-static inline u8 sis630_read(u8 reg)
-{
- return inb(acpi_base + reg);
-}
-
-static inline void sis630_write(u8 reg, u8 data)
-{
- outb(data, acpi_base + reg);
-}
-
-static int sis630_transaction_start(struct i2c_adapter *adap, int size, u8 *oldclock)
-{
- int temp;
-
- /* Make sure the SMBus host is ready to start transmitting. */
- if ((temp = sis630_read(SMB_CNT) & 0x03) != 0x00) {
- dev_dbg(&adap->dev, "SMBus busy (%02x).Resetting...\n",temp);
- /* kill smbus transaction */
- sis630_write(SMBHOST_CNT, 0x20);
-
- if ((temp = sis630_read(SMB_CNT) & 0x03) != 0x00) {
- dev_dbg(&adap->dev, "Failed! (%02x)\n", temp);
- return -EBUSY;
- } else {
- dev_dbg(&adap->dev, "Successful!\n");
- }
- }
-
- /* save old clock, so we can prevent machine for hung */
- *oldclock = sis630_read(SMB_CNT);
-
- dev_dbg(&adap->dev, "saved clock 0x%02x\n", *oldclock);
-
- /* disable timeout interrupt , set Host Master Clock to 56KHz if requested */
- if (high_clock)
- sis630_write(SMB_CNT, 0x20);
- else
- sis630_write(SMB_CNT, (*oldclock & ~0x40));
-
- /* clear all sticky bits */
- temp = sis630_read(SMB_STS);
- sis630_write(SMB_STS, temp & 0x1e);
-
- /* start the transaction by setting bit 4 and size */
- sis630_write(SMBHOST_CNT,0x10 | (size & 0x07));
-
- return 0;
-}
-
-static int sis630_transaction_wait(struct i2c_adapter *adap, int size)
-{
- int temp, result = 0, timeout = 0;
-
- /* We will always wait for a fraction of a second! */
- do {
- msleep(1);
- temp = sis630_read(SMB_STS);
- /* check if block transmitted */
- if (size == SIS630_BLOCK_DATA && (temp & 0x10))
- break;
- } while (!(temp & 0x0e) && (timeout++ < MAX_TIMEOUT));
-
- /* If the SMBus is still busy, we give up */
- if (timeout > MAX_TIMEOUT) {
- dev_dbg(&adap->dev, "SMBus Timeout!\n");
- result = -ETIMEDOUT;
- }
-
- if (temp & 0x02) {
- dev_dbg(&adap->dev, "Error: Failed bus transaction\n");
- result = -ENXIO;
- }
-
- if (temp & 0x04) {
- dev_err(&adap->dev, "Bus collision!\n");
- result = -EIO;
- /*
- TBD: Datasheet say:
- the software should clear this bit and restart SMBUS operation.
- Should we do it or user start request again?
- */
- }
-
- return result;
-}
-
-static void sis630_transaction_end(struct i2c_adapter *adap, u8 oldclock)
-{
- int temp = 0;
-
- /* clear all status "sticky" bits */
- sis630_write(SMB_STS, temp);
-
- dev_dbg(&adap->dev, "SMB_CNT before clock restore 0x%02x\n", sis630_read(SMB_CNT));
-
- /*
- * restore old Host Master Clock if high_clock is set
- * and oldclock was not 56KHz
- */
- if (high_clock && !(oldclock & 0x20))
- sis630_write(SMB_CNT,(sis630_read(SMB_CNT) & ~0x20));
-
- dev_dbg(&adap->dev, "SMB_CNT after clock restore 0x%02x\n", sis630_read(SMB_CNT));
-}
-
-static int sis630_transaction(struct i2c_adapter *adap, int size)
-{
- int result = 0;
- u8 oldclock = 0;
-
- result = sis630_transaction_start(adap, size, &oldclock);
- if (!result) {
- result = sis630_transaction_wait(adap, size);
- sis630_transaction_end(adap, oldclock);
- }
-
- return result;
-}
-
-static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *data, int read_write)
-{
- int i, len = 0, rc = 0;
- u8 oldclock = 0;
-
- if (read_write == I2C_SMBUS_WRITE) {
- len = data->block[0];
- if (len < 0)
- len = 0;
- else if (len > 32)
- len = 32;
- sis630_write(SMB_COUNT, len);
- for (i=1; i <= len; i++) {
- dev_dbg(&adap->dev, "set data 0x%02x\n", data->block[i]);
- /* set data */
- sis630_write(SMB_BYTE+(i-1)%8, data->block[i]);
- if (i==8 || (len<8 && i==len)) {
- dev_dbg(&adap->dev, "start trans len=%d i=%d\n",len ,i);
- /* first transaction */
- rc = sis630_transaction_start(adap,
- SIS630_BLOCK_DATA, &oldclock);
- if (rc)
- return rc;
- }
- else if ((i-1)%8 == 7 || i==len) {
- dev_dbg(&adap->dev, "trans_wait len=%d i=%d\n",len,i);
- if (i>8) {
- dev_dbg(&adap->dev, "clear smbary_sts len=%d i=%d\n",len,i);
- /*
- If this is not first transaction,
- we must clear sticky bit.
- clear SMBARY_STS
- */
- sis630_write(SMB_STS,0x10);
- }
- rc = sis630_transaction_wait(adap,
- SIS630_BLOCK_DATA);
- if (rc) {
- dev_dbg(&adap->dev, "trans_wait failed\n");
- break;
- }
- }
- }
- }
- else {
- /* read request */
- data->block[0] = len = 0;
- rc = sis630_transaction_start(adap,
- SIS630_BLOCK_DATA, &oldclock);
- if (rc)
- return rc;
- do {
- rc = sis630_transaction_wait(adap, SIS630_BLOCK_DATA);
- if (rc) {
- dev_dbg(&adap->dev, "trans_wait failed\n");
- break;
- }
- /* if this first transaction then read byte count */
- if (len == 0)
- data->block[0] = sis630_read(SMB_COUNT);
-
- /* just to be sure */
- if (data->block[0] > 32)
- data->block[0] = 32;
-
- dev_dbg(&adap->dev, "block data read len=0x%x\n", data->block[0]);
-
- for (i=0; i < 8 && len < data->block[0]; i++,len++) {
- dev_dbg(&adap->dev, "read i=%d len=%d\n", i, len);
- data->block[len+1] = sis630_read(SMB_BYTE+i);
- }
-
- dev_dbg(&adap->dev, "clear smbary_sts len=%d i=%d\n",len,i);
-
- /* clear SMBARY_STS */
- sis630_write(SMB_STS,0x10);
- } while(len < data->block[0]);
- }
-
- sis630_transaction_end(adap, oldclock);
-
- return rc;
-}
-
-/* Return negative errno on error. */
-static s32 sis630_access(struct i2c_adapter *adap, u16 addr,
- unsigned short flags, char read_write,
- u8 command, int size, union i2c_smbus_data *data)
-{
- int status;
-
- switch (size) {
- case I2C_SMBUS_QUICK:
- sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01));
- size = SIS630_QUICK;
- break;
- case I2C_SMBUS_BYTE:
- sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01));
- if (read_write == I2C_SMBUS_WRITE)
- sis630_write(SMB_CMD, command);
- size = SIS630_BYTE;
- break;
- case I2C_SMBUS_BYTE_DATA:
- sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01));
- sis630_write(SMB_CMD, command);
- if (read_write == I2C_SMBUS_WRITE)
- sis630_write(SMB_BYTE, data->byte);
- size = SIS630_BYTE_DATA;
- break;
- case I2C_SMBUS_PROC_CALL:
- case I2C_SMBUS_WORD_DATA:
- sis630_write(SMB_ADDR,((addr & 0x7f) << 1) | (read_write & 0x01));
- sis630_write(SMB_CMD, command);
- if (read_write == I2C_SMBUS_WRITE) {
- sis630_write(SMB_BYTE, data->word & 0xff);
- sis630_write(SMB_BYTE + 1,(data->word & 0xff00) >> 8);
- }
- size = (size == I2C_SMBUS_PROC_CALL ? SIS630_PCALL : SIS630_WORD_DATA);
- break;
- case I2C_SMBUS_BLOCK_DATA:
- sis630_write(SMB_ADDR,((addr & 0x7f) << 1) | (read_write & 0x01));
- sis630_write(SMB_CMD, command);
- size = SIS630_BLOCK_DATA;
- return sis630_block_data(adap, data, read_write);
- default:
- dev_warn(&adap->dev, "Unsupported transaction %d\n",
- size);
- return -EOPNOTSUPP;
- }
-
- status = sis630_transaction(adap, size);
- if (status)
- return status;
-
- if ((size != SIS630_PCALL) &&
- ((read_write == I2C_SMBUS_WRITE) || (size == SIS630_QUICK))) {
- return 0;
- }
-
- switch(size) {
- case SIS630_BYTE:
- case SIS630_BYTE_DATA:
- data->byte = sis630_read(SMB_BYTE);
- break;
- case SIS630_PCALL:
- case SIS630_WORD_DATA:
- data->word = sis630_read(SMB_BYTE) + (sis630_read(SMB_BYTE + 1) << 8);
- break;
- }
-
- return 0;
-}
-
-static u32 sis630_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_PROC_CALL |
- I2C_FUNC_SMBUS_BLOCK_DATA;
-}
-
-static int __devinit sis630_setup(struct pci_dev *sis630_dev)
-{
- unsigned char b;
- struct pci_dev *dummy = NULL;
- int retval, i;
-
- /* check for supported SiS devices */
- for (i=0; supported[i] > 0 ; i++) {
- if ((dummy = pci_get_device(PCI_VENDOR_ID_SI, supported[i], dummy)))
- break; /* found */
- }
-
- if (dummy) {
- pci_dev_put(dummy);
- }
- else if (force) {
- dev_err(&sis630_dev->dev, "WARNING: Can't detect SIS630 compatible device, but "
- "loading because of force option enabled\n");
- }
- else {
- return -ENODEV;
- }
-
- /*
- Enable ACPI first , so we can accsess reg 74-75
- in acpi io space and read acpi base addr
- */
- if (pci_read_config_byte(sis630_dev, SIS630_BIOS_CTL_REG,&b)) {
- dev_err(&sis630_dev->dev, "Error: Can't read bios ctl reg\n");
- retval = -ENODEV;
- goto exit;
- }
- /* if ACPI already enabled , do nothing */
- if (!(b & 0x80) &&
- pci_write_config_byte(sis630_dev, SIS630_BIOS_CTL_REG, b | 0x80)) {
- dev_err(&sis630_dev->dev, "Error: Can't enable ACPI\n");
- retval = -ENODEV;
- goto exit;
- }
-
- /* Determine the ACPI base address */
- if (pci_read_config_word(sis630_dev,SIS630_ACPI_BASE_REG,&acpi_base)) {
- dev_err(&sis630_dev->dev, "Error: Can't determine ACPI base address\n");
- retval = -ENODEV;
- goto exit;
- }
-
- dev_dbg(&sis630_dev->dev, "ACPI base at 0x%04x\n", acpi_base);
-
- retval = acpi_check_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION,
- sis630_driver.name);
- if (retval)
- goto exit;
-
- /* Everything is happy, let's grab the memory and set things up. */
- if (!request_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION,
- sis630_driver.name)) {
- dev_err(&sis630_dev->dev, "SMBus registers 0x%04x-0x%04x already "
- "in use!\n", acpi_base + SMB_STS, acpi_base + SMB_SAA);
- retval = -EBUSY;
- goto exit;
- }
-
- retval = 0;
-
-exit:
- if (retval)
- acpi_base = 0;
- return retval;
-}
-
-
-static const struct i2c_algorithm smbus_algorithm = {
- .smbus_xfer = sis630_access,
- .functionality = sis630_func,
-};
-
-static struct i2c_adapter sis630_adapter = {
- .owner = THIS_MODULE,
- .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
- .algo = &smbus_algorithm,
-};
-
-static DEFINE_PCI_DEVICE_TABLE(sis630_ids) = {
- { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
- { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC) },
- { 0, }
-};
-
-MODULE_DEVICE_TABLE (pci, sis630_ids);
-
-static int __devinit sis630_probe(struct pci_dev *dev, const struct pci_device_id *id)
-{
- if (sis630_setup(dev)) {
- dev_err(&dev->dev, "SIS630 comp. bus not detected, module not inserted.\n");
- return -ENODEV;
- }
-
- /* set up the sysfs linkage to our parent device */
- sis630_adapter.dev.parent = &dev->dev;
-
- snprintf(sis630_adapter.name, sizeof(sis630_adapter.name),
- "SMBus SIS630 adapter at %04x", acpi_base + SMB_STS);
-
- return i2c_add_adapter(&sis630_adapter);
-}
-
-static void __devexit sis630_remove(struct pci_dev *dev)
-{
- if (acpi_base) {
- i2c_del_adapter(&sis630_adapter);
- release_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION);
- acpi_base = 0;
- }
-}
-
-
-static struct pci_driver sis630_driver = {
- .name = "sis630_smbus",
- .id_table = sis630_ids,
- .probe = sis630_probe,
- .remove = __devexit_p(sis630_remove),
-};
-
-static int __init i2c_sis630_init(void)
-{
- return pci_register_driver(&sis630_driver);
-}
-
-
-static void __exit i2c_sis630_exit(void)
-{
- pci_unregister_driver(&sis630_driver);
-}
-
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Alexander Malysh <amalysh@web.de>");
-MODULE_DESCRIPTION("SIS630 SMBus driver");
-
-module_init(i2c_sis630_init);
-module_exit(i2c_sis630_exit);
generated by cgit (git 2.34.1) at 2025-03-30 20:26:38 +0000