Linux-2.6.12-rc2v2.6.12-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, 415 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-ali1563.c b/drivers/i2c/busses/i2c-ali1563.c
new file mode 100644
index 00000000000..35710818fe4
--- /dev/null
+++ b/drivers/i2c/busses/i2c-ali1563.c
@@ -0,0 +1,415 @@
+/**
+ *	i2c-ali1563.c - i2c driver for the ALi 1563 Southbridge
+ *
+ *	Copyright (C) 2004 Patrick Mochel
+ *
+ *	The 1563 southbridge is deceptively similar to the 1533, with a
+ *	few notable exceptions. One of those happens to be the fact they
+ *	upgraded the i2c core to be 2.0 compliant, and happens to be almost
+ *	identical to the i2c controller found in the Intel 801 south
+ *	bridges.
+ *
+ *	This driver is based on a mix of the 15x3, 1535, and i801 drivers,
+ *	with a little help from the ALi 1563 spec.
+ *
+ *	This file is released under the GPLv2
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#define ALI1563_MAX_TIMEOUT	500
+#define	ALI1563_SMBBA		0x80
+#define ALI1563_SMB_IOEN	1
+#define ALI1563_SMB_HOSTEN	2
+#define ALI1563_SMB_IOSIZE	16
+
+#define SMB_HST_STS	(ali1563_smba + 0)
+#define SMB_HST_CNTL1	(ali1563_smba + 1)
+#define SMB_HST_CNTL2	(ali1563_smba + 2)
+#define SMB_HST_CMD	(ali1563_smba + 3)
+#define SMB_HST_ADD	(ali1563_smba + 4)
+#define SMB_HST_DAT0	(ali1563_smba + 5)
+#define SMB_HST_DAT1	(ali1563_smba + 6)
+#define SMB_BLK_DAT	(ali1563_smba + 7)
+
+#define HST_STS_BUSY	0x01
+#define HST_STS_INTR	0x02
+#define HST_STS_DEVERR	0x04
+#define HST_STS_BUSERR	0x08
+#define HST_STS_FAIL	0x10
+#define HST_STS_DONE	0x80
+#define HST_STS_BAD	0x1c
+
+
+#define HST_CNTL1_TIMEOUT	0x80
+#define HST_CNTL1_LAST		0x40
+
+#define HST_CNTL2_KILL		0x04
+#define HST_CNTL2_START		0x40
+#define HST_CNTL2_QUICK		0x00
+#define HST_CNTL2_BYTE		0x01
+#define HST_CNTL2_BYTE_DATA	0x02
+#define HST_CNTL2_WORD_DATA	0x03
+#define HST_CNTL2_BLOCK		0x05
+
+
+
+static unsigned short ali1563_smba;
+
+static int ali1563_transaction(struct i2c_adapter * a)
+{
+	u32 data;
+	int timeout;
+
+	dev_dbg(&a->dev, "Transaction (pre): STS=%02x, CNTL1=%02x, "
+		"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",
+		inb_p(SMB_HST_STS), inb_p(SMB_HST_CNTL1), inb_p(SMB_HST_CNTL2),
+		inb_p(SMB_HST_CMD), inb_p(SMB_HST_ADD), inb_p(SMB_HST_DAT0),
+		inb_p(SMB_HST_DAT1));
+
+	data = inb_p(SMB_HST_STS);
+	if (data & HST_STS_BAD) {
+		dev_warn(&a->dev,"ali1563: Trying to reset busy device\n");
+		outb_p(data | HST_STS_BAD,SMB_HST_STS);
+		data = inb_p(SMB_HST_STS);
+		if (data & HST_STS_BAD)
+			return -EBUSY;
+	}
+	outb_p(inb_p(SMB_HST_CNTL2) | HST_CNTL2_START, SMB_HST_CNTL2);
+
+	timeout = ALI1563_MAX_TIMEOUT;
+	do
+		msleep(1);
+	while (((data = inb_p(SMB_HST_STS)) & HST_STS_BUSY) && --timeout);
+
+	dev_dbg(&a->dev, "Transaction (post): STS=%02x, CNTL1=%02x, "
+		"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",
+		inb_p(SMB_HST_STS), inb_p(SMB_HST_CNTL1), inb_p(SMB_HST_CNTL2),
+		inb_p(SMB_HST_CMD), inb_p(SMB_HST_ADD), inb_p(SMB_HST_DAT0),
+		inb_p(SMB_HST_DAT1));
+
+	if (timeout && !(data & HST_STS_BAD))
+		return 0;
+	dev_warn(&a->dev, "SMBus Error: %s%s%s%s%s\n",
+		timeout ? "Timeout " : "",
+		data & HST_STS_FAIL ? "Transaction Failed " : "",
+		data & HST_STS_BUSERR ? "No response or Bus Collision " : "",
+		data & HST_STS_DEVERR ? "Device Error " : "",
+		!(data & HST_STS_DONE) ? "Transaction Never Finished " : "");
+
+	if (!(data & HST_STS_DONE))
+		/* Issue 'kill' to host controller */
+		outb_p(HST_CNTL2_KILL,SMB_HST_CNTL2);
+	else
+		/* Issue timeout to reset all devices on bus */
+		outb_p(HST_CNTL1_TIMEOUT,SMB_HST_CNTL1);
+	return -1;
+}
+
+static int ali1563_block_start(struct i2c_adapter * a)
+{
+	u32 data;
+	int timeout;
+
+	dev_dbg(&a->dev, "Block (pre): STS=%02x, CNTL1=%02x, "
+		"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",
+		inb_p(SMB_HST_STS), inb_p(SMB_HST_CNTL1), inb_p(SMB_HST_CNTL2),
+		inb_p(SMB_HST_CMD), inb_p(SMB_HST_ADD), inb_p(SMB_HST_DAT0),
+		inb_p(SMB_HST_DAT1));
+
+	data = inb_p(SMB_HST_STS);
+	if (data & HST_STS_BAD) {
+		dev_warn(&a->dev,"ali1563: Trying to reset busy device\n");
+		outb_p(data | HST_STS_BAD,SMB_HST_STS);
+		data = inb_p(SMB_HST_STS);
+		if (data & HST_STS_BAD)
+			return -EBUSY;
+	}
+
+	/* Clear byte-ready bit */
+	outb_p(data | HST_STS_DONE, SMB_HST_STS);
+
+	/* Start transaction and wait for byte-ready bit to be set */
+	outb_p(inb_p(SMB_HST_CNTL2) | HST_CNTL2_START, SMB_HST_CNTL2);
+
+	timeout = ALI1563_MAX_TIMEOUT;
+	do
+		msleep(1);
+	while (!((data = inb_p(SMB_HST_STS)) & HST_STS_DONE) && --timeout);
+
+	dev_dbg(&a->dev, "Block (post): STS=%02x, CNTL1=%02x, "
+		"CNTL2=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, DAT1=%02x\n",
+		inb_p(SMB_HST_STS), inb_p(SMB_HST_CNTL1), inb_p(SMB_HST_CNTL2),
+		inb_p(SMB_HST_CMD), inb_p(SMB_HST_ADD), inb_p(SMB_HST_DAT0),
+		inb_p(SMB_HST_DAT1));
+
+	if (timeout && !(data & HST_STS_BAD))
+		return 0;
+	dev_warn(&a->dev, "SMBus Error: %s%s%s%s%s\n",
+		timeout ? "Timeout " : "",
+		data & HST_STS_FAIL ? "Transaction Failed " : "",
+		data & HST_STS_BUSERR ? "No response or Bus Collision " : "",
+		data & HST_STS_DEVERR ? "Device Error " : "",
+		!(data & HST_STS_DONE) ? "Transaction Never Finished " : "");
+	return -1;
+}
+
+static int ali1563_block(struct i2c_adapter * a, union i2c_smbus_data * data, u8 rw)
+{
+	int i, len;
+	int error = 0;
+
+	/* Do we need this? */
+	outb_p(HST_CNTL1_LAST,SMB_HST_CNTL1);
+
+	if (rw == I2C_SMBUS_WRITE) {
+		len = data->block[0];
+		if (len < 1)
+			len = 1;
+		else if (len > 32)
+			len = 32;
+		outb_p(len,SMB_HST_DAT0);
+		outb_p(data->block[1],SMB_BLK_DAT);
+	} else
+		len = 32;
+
+	outb_p(inb_p(SMB_HST_CNTL2) | HST_CNTL2_BLOCK, SMB_HST_CNTL2);
+
+	for (i = 0; i < len; i++) {
+		if (rw == I2C_SMBUS_WRITE) {
+			outb_p(data->block[i + 1], SMB_BLK_DAT);
+			if ((error = ali1563_block_start(a)))
+				break;
+		} else {
+			if ((error = ali1563_block_start(a)))
+				break;
+			if (i == 0) {
+				len = inb_p(SMB_HST_DAT0);
+				if (len < 1)
+					len = 1;
+				else if (len > 32)
+					len = 32;
+			}
+			data->block[i+1] = inb_p(SMB_BLK_DAT);
+		}
+	}
+	/* Do we need this? */
+	outb_p(HST_CNTL1_LAST,SMB_HST_CNTL1);
+	return error;
+}
+
+static s32 ali1563_access(struct i2c_adapter * a, u16 addr,
+			  unsigned short flags, char rw, u8 cmd,
+			  int size, union i2c_smbus_data * data)
+{
+	int error = 0;
+	int timeout;
+	u32 reg;
+
+	for (timeout = ALI1563_MAX_TIMEOUT; timeout; timeout--) {
+		if (!(reg = inb_p(SMB_HST_STS) & HST_STS_BUSY))
+			break;
+	}
+	if (!timeout)
+		dev_warn(&a->dev,"SMBus not idle. HST_STS = %02x\n",reg);
+	outb_p(0xff,SMB_HST_STS);
+
+	/* Map the size to what the chip understands */
+	switch (size) {
+	case I2C_SMBUS_PROC_CALL:
+		dev_err(&a->dev, "I2C_SMBUS_PROC_CALL not supported!\n");
+		error = -EINVAL;
+		break;
+	case I2C_SMBUS_QUICK:
+		size = HST_CNTL2_QUICK;
+		break;
+	case I2C_SMBUS_BYTE:
+		size = HST_CNTL2_BYTE;
+		break;
+	case I2C_SMBUS_BYTE_DATA:
+		size = HST_CNTL2_BYTE_DATA;
+		break;
+	case I2C_SMBUS_WORD_DATA:
+		size = HST_CNTL2_WORD_DATA;
+		break;
+	case I2C_SMBUS_BLOCK_DATA:
+		size = HST_CNTL2_BLOCK;
+		break;
+	}
+
+	outb_p(((addr & 0x7f) << 1) | (rw & 0x01), SMB_HST_ADD);
+	outb_p(inb_p(SMB_HST_CNTL2) | (size << 3), SMB_HST_CNTL2);
+
+	/* Write the command register */
+	switch(size) {
+	case HST_CNTL2_BYTE:
+		if (rw== I2C_SMBUS_WRITE)
+			outb_p(cmd, SMB_HST_CMD);
+		break;
+	case HST_CNTL2_BYTE_DATA:
+		outb_p(cmd, SMB_HST_CMD);
+		if (rw == I2C_SMBUS_WRITE)
+			outb_p(data->byte, SMB_HST_DAT0);
+		break;
+	case HST_CNTL2_WORD_DATA:
+		outb_p(cmd, SMB_HST_CMD);
+		if (rw == I2C_SMBUS_WRITE) {
+			outb_p(data->word & 0xff, SMB_HST_DAT0);
+			outb_p((data->word & 0xff00) >> 8, SMB_HST_DAT1);
+		}
+		break;
+	case HST_CNTL2_BLOCK:
+		outb_p(cmd, SMB_HST_CMD);
+		error = ali1563_block(a,data,rw);
+		goto Done;
+	}
+
+	if ((error = ali1563_transaction(a)))
+		goto Done;
+
+	if ((rw == I2C_SMBUS_WRITE) || (size == HST_CNTL2_QUICK))
+		goto Done;
+
+	switch (size) {
+	case HST_CNTL2_BYTE:	/* Result put in SMBHSTDAT0 */
+		data->byte = inb_p(SMB_HST_DAT0);
+		break;
+	case HST_CNTL2_BYTE_DATA:
+		data->byte = inb_p(SMB_HST_DAT0);
+		break;
+	case HST_CNTL2_WORD_DATA:
+		data->word = inb_p(SMB_HST_DAT0) + (inb_p(SMB_HST_DAT1) << 8);
+		break;
+	}
+Done:
+	return error;
+}
+
+static u32 ali1563_func(struct i2c_adapter * a)
+{
+	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 void ali1563_enable(struct pci_dev * dev)
+{
+	u16 ctrl;
+
+	pci_read_config_word(dev,ALI1563_SMBBA,&ctrl);
+	ctrl |= 0x7;
+	pci_write_config_word(dev,ALI1563_SMBBA,ctrl);
+}
+
+static int __devinit ali1563_setup(struct pci_dev * dev)
+{
+	u16 ctrl;
+
+	pci_read_config_word(dev,ALI1563_SMBBA,&ctrl);
+	printk("ali1563: SMBus control = %04x\n",ctrl);
+
+	/* Check if device is even enabled first */
+	if (!(ctrl & ALI1563_SMB_IOEN)) {
+		dev_warn(&dev->dev,"I/O space not enabled, trying manually\n");
+		ali1563_enable(dev);
+	}
+	if (!(ctrl & ALI1563_SMB_IOEN)) {
+		dev_warn(&dev->dev,"I/O space still not enabled, giving up\n");
+		goto Err;
+	}
+	if (!(ctrl & ALI1563_SMB_HOSTEN)) {
+		dev_warn(&dev->dev,"Host Controller not enabled\n");
+		goto Err;
+	}
+
+	/* SMB I/O Base in high 12 bits and must be aligned with the
+	 * size of the I/O space. */
+	ali1563_smba = ctrl & ~(ALI1563_SMB_IOSIZE - 1);
+	if (!ali1563_smba) {
+		dev_warn(&dev->dev,"ali1563_smba Uninitialized\n");
+		goto Err;
+	}
+	if (!request_region(ali1563_smba,ALI1563_SMB_IOSIZE,"i2c-ali1563")) {
+		dev_warn(&dev->dev,"Could not allocate I/O space");
+		goto Err;
+	}
+
+	return 0;
+Err:
+	return -ENODEV;
+}
+
+static void ali1563_shutdown(struct pci_dev *dev)
+{
+	release_region(ali1563_smba,ALI1563_SMB_IOSIZE);
+}
+
+static struct i2c_algorithm ali1563_algorithm = {
+	.name		= "Non-i2c SMBus adapter",
+	.id		= I2C_ALGO_SMBUS,
+	.smbus_xfer	= ali1563_access,
+	.functionality	= ali1563_func,
+};
+
+static struct i2c_adapter ali1563_adapter = {
+	.owner	= THIS_MODULE,
+	.class	= I2C_CLASS_HWMON,
+	.algo	= &ali1563_algorithm,
+};
+
+static int __devinit ali1563_probe(struct pci_dev * dev,
+				const struct pci_device_id * id_table)
+{
+	int error;
+
+	if ((error = ali1563_setup(dev)))
+		return error;
+	ali1563_adapter.dev.parent = &dev->dev;
+	sprintf(ali1563_adapter.name,"SMBus ALi 1563 Adapter @ %04x",
+		ali1563_smba);
+	if ((error = i2c_add_adapter(&ali1563_adapter)))
+		ali1563_shutdown(dev);
+	printk("%s: Returning %d\n",__FUNCTION__,error);
+	return error;
+}
+
+static void __devexit ali1563_remove(struct pci_dev * dev)
+{
+	i2c_del_adapter(&ali1563_adapter);
+	ali1563_shutdown(dev);
+}
+
+static struct pci_device_id __devinitdata ali1563_id_table[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1563) },
+	{},
+};
+
+MODULE_DEVICE_TABLE (pci, ali1563_id_table);
+
+static struct pci_driver ali1563_pci_driver = {
+ 	.name		= "ali1563_i2c",
+	.id_table	= ali1563_id_table,
+ 	.probe		= ali1563_probe,
+	.remove		= __devexit_p(ali1563_remove),
+};
+
+static int __init ali1563_init(void)
+{
+	return pci_register_driver(&ali1563_pci_driver);
+}
+
+module_init(ali1563_init);
+
+static void __exit ali1563_exit(void)
+{
+	pci_unregister_driver(&ali1563_pci_driver);
+}
+
+module_exit(ali1563_exit);
+
+MODULE_LICENSE("GPL");