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-amd8111.c b/drivers/i2c/busses/i2c-amd8111.c
new file mode 100644
index 00000000000..af22b401a38
--- /dev/null
+++ b/drivers/i2c/busses/i2c-amd8111.c
@@ -0,0 +1,415 @@
+/*
+ * SMBus 2.0 driver for AMD-8111 IO-Hub.
+ *
+ * Copyright (c) 2002 Vojtech Pavlik
+ *
+ * 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 version 2.
+ */
+
+#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/init.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR ("Vojtech Pavlik <vojtech@suse.cz>");
+MODULE_DESCRIPTION("AMD8111 SMBus 2.0 driver");
+
+struct amd_smbus {
+	struct pci_dev *dev;
+	struct i2c_adapter adapter;
+	int base;
+	int size;
+};
+
+/*
+ * AMD PCI control registers definitions.
+ */
+
+#define AMD_PCI_MISC	0x48
+
+#define AMD_PCI_MISC_SCI	0x04	/* deliver SCI */
+#define AMD_PCI_MISC_INT	0x02	/* deliver PCI IRQ */
+#define AMD_PCI_MISC_SPEEDUP	0x01	/* 16x clock speedup */
+
+/*
+ * ACPI 2.0 chapter 13 PCI interface definitions.
+ */
+
+#define AMD_EC_DATA	0x00	/* data register */
+#define AMD_EC_SC	0x04	/* status of controller */
+#define AMD_EC_CMD	0x04	/* command register */
+#define AMD_EC_ICR	0x08	/* interrupt control register */
+
+#define AMD_EC_SC_SMI	0x04	/* smi event pending */
+#define AMD_EC_SC_SCI	0x02	/* sci event pending */
+#define AMD_EC_SC_BURST	0x01	/* burst mode enabled */
+#define AMD_EC_SC_CMD	0x08	/* byte in data reg is command */
+#define AMD_EC_SC_IBF	0x02	/* data ready for embedded controller */
+#define AMD_EC_SC_OBF	0x01	/* data ready for host */
+
+#define AMD_EC_CMD_RD	0x80	/* read EC */
+#define AMD_EC_CMD_WR	0x81	/* write EC */
+#define AMD_EC_CMD_BE	0x82	/* enable burst mode */
+#define AMD_EC_CMD_BD	0x83	/* disable burst mode */
+#define AMD_EC_CMD_QR	0x84	/* query EC */
+
+/*
+ * ACPI 2.0 chapter 13 access of registers of the EC
+ */
+
+static unsigned int amd_ec_wait_write(struct amd_smbus *smbus)
+{
+	int timeout = 500;
+
+	while (timeout-- && (inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_IBF))
+		udelay(1);
+
+	if (!timeout) {
+		dev_warn(&smbus->dev->dev, "Timeout while waiting for IBF to clear\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static unsigned int amd_ec_wait_read(struct amd_smbus *smbus)
+{
+	int timeout = 500;
+
+	while (timeout-- && (~inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_OBF))
+		udelay(1);
+
+	if (!timeout) {
+		dev_warn(&smbus->dev->dev, "Timeout while waiting for OBF to set\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static unsigned int amd_ec_read(struct amd_smbus *smbus, unsigned char address, unsigned char *data)
+{
+	if (amd_ec_wait_write(smbus))
+		return -1;
+	outb(AMD_EC_CMD_RD, smbus->base + AMD_EC_CMD);
+
+	if (amd_ec_wait_write(smbus))
+		return -1;
+	outb(address, smbus->base + AMD_EC_DATA);
+
+	if (amd_ec_wait_read(smbus))
+		return -1;
+	*data = inb(smbus->base + AMD_EC_DATA);
+
+	return 0;
+}
+
+static unsigned int amd_ec_write(struct amd_smbus *smbus, unsigned char address, unsigned char data)
+{
+	if (amd_ec_wait_write(smbus))
+		return -1;
+	outb(AMD_EC_CMD_WR, smbus->base + AMD_EC_CMD);
+
+	if (amd_ec_wait_write(smbus))
+		return -1;
+	outb(address, smbus->base + AMD_EC_DATA);
+
+	if (amd_ec_wait_write(smbus))
+		return -1;
+	outb(data, smbus->base + AMD_EC_DATA);
+
+	return 0;
+}
+
+/*
+ * ACPI 2.0 chapter 13 SMBus 2.0 EC register model
+ */
+
+#define AMD_SMB_PRTCL	0x00	/* protocol, PEC */
+#define AMD_SMB_STS	0x01	/* status */
+#define AMD_SMB_ADDR	0x02	/* address */
+#define AMD_SMB_CMD	0x03	/* command */
+#define AMD_SMB_DATA	0x04	/* 32 data registers */
+#define AMD_SMB_BCNT	0x24	/* number of data bytes */
+#define AMD_SMB_ALRM_A	0x25	/* alarm address */
+#define AMD_SMB_ALRM_D	0x26	/* 2 bytes alarm data */
+
+#define AMD_SMB_STS_DONE	0x80
+#define AMD_SMB_STS_ALRM	0x40
+#define AMD_SMB_STS_RES		0x20
+#define AMD_SMB_STS_STATUS	0x1f
+
+#define AMD_SMB_STATUS_OK	0x00
+#define AMD_SMB_STATUS_FAIL	0x07
+#define AMD_SMB_STATUS_DNAK	0x10
+#define AMD_SMB_STATUS_DERR	0x11
+#define AMD_SMB_STATUS_CMD_DENY	0x12
+#define AMD_SMB_STATUS_UNKNOWN	0x13
+#define AMD_SMB_STATUS_ACC_DENY	0x17
+#define AMD_SMB_STATUS_TIMEOUT	0x18
+#define AMD_SMB_STATUS_NOTSUP	0x19
+#define AMD_SMB_STATUS_BUSY	0x1A
+#define AMD_SMB_STATUS_PEC	0x1F
+
+#define AMD_SMB_PRTCL_WRITE		0x00
+#define AMD_SMB_PRTCL_READ		0x01
+#define AMD_SMB_PRTCL_QUICK		0x02
+#define AMD_SMB_PRTCL_BYTE		0x04
+#define AMD_SMB_PRTCL_BYTE_DATA		0x06
+#define AMD_SMB_PRTCL_WORD_DATA		0x08
+#define AMD_SMB_PRTCL_BLOCK_DATA	0x0a
+#define AMD_SMB_PRTCL_PROC_CALL		0x0c
+#define AMD_SMB_PRTCL_BLOCK_PROC_CALL	0x0d
+#define AMD_SMB_PRTCL_I2C_BLOCK_DATA	0x4a
+#define AMD_SMB_PRTCL_PEC		0x80
+
+
+static s32 amd8111_access(struct i2c_adapter * adap, u16 addr, unsigned short flags,
+		char read_write, u8 command, int size, union i2c_smbus_data * data)
+{
+	struct amd_smbus *smbus = adap->algo_data;
+	unsigned char protocol, len, pec, temp[2];
+	int i;
+
+	protocol = (read_write == I2C_SMBUS_READ) ? AMD_SMB_PRTCL_READ : AMD_SMB_PRTCL_WRITE;
+	pec = (flags & I2C_CLIENT_PEC) ? AMD_SMB_PRTCL_PEC : 0;
+
+	switch (size) {
+
+		case I2C_SMBUS_QUICK:
+			protocol |= AMD_SMB_PRTCL_QUICK;
+			read_write = I2C_SMBUS_WRITE;
+			break;
+
+		case I2C_SMBUS_BYTE:
+			if (read_write == I2C_SMBUS_WRITE)
+				amd_ec_write(smbus, AMD_SMB_CMD, command);
+			protocol |= AMD_SMB_PRTCL_BYTE;
+			break;
+
+		case I2C_SMBUS_BYTE_DATA:
+			amd_ec_write(smbus, AMD_SMB_CMD, command);
+			if (read_write == I2C_SMBUS_WRITE)
+				amd_ec_write(smbus, AMD_SMB_DATA, data->byte);
+			protocol |= AMD_SMB_PRTCL_BYTE_DATA;
+			break;
+
+		case I2C_SMBUS_WORD_DATA:
+			amd_ec_write(smbus, AMD_SMB_CMD, command);
+			if (read_write == I2C_SMBUS_WRITE) {
+				amd_ec_write(smbus, AMD_SMB_DATA, data->word);
+				amd_ec_write(smbus, AMD_SMB_DATA + 1, data->word >> 8);
+			}
+			protocol |= AMD_SMB_PRTCL_WORD_DATA | pec;
+			break;
+
+		case I2C_SMBUS_BLOCK_DATA:
+			amd_ec_write(smbus, AMD_SMB_CMD, command);
+			if (read_write == I2C_SMBUS_WRITE) {
+				len = min_t(u8, data->block[0], 32);
+				amd_ec_write(smbus, AMD_SMB_BCNT, len);
+				for (i = 0; i < len; i++)
+					amd_ec_write(smbus, AMD_SMB_DATA + i, data->block[i + 1]);
+			}
+			protocol |= AMD_SMB_PRTCL_BLOCK_DATA | pec;
+			break;
+
+		case I2C_SMBUS_I2C_BLOCK_DATA:
+			len = min_t(u8, data->block[0], 32);
+			amd_ec_write(smbus, AMD_SMB_CMD, command);
+			amd_ec_write(smbus, AMD_SMB_BCNT, len);
+			if (read_write == I2C_SMBUS_WRITE)
+				for (i = 0; i < len; i++)
+					amd_ec_write(smbus, AMD_SMB_DATA + i, data->block[i + 1]);
+			protocol |= AMD_SMB_PRTCL_I2C_BLOCK_DATA;
+			break;
+
+		case I2C_SMBUS_PROC_CALL:
+			amd_ec_write(smbus, AMD_SMB_CMD, command);
+			amd_ec_write(smbus, AMD_SMB_DATA, data->word);
+			amd_ec_write(smbus, AMD_SMB_DATA + 1, data->word >> 8);
+			protocol = AMD_SMB_PRTCL_PROC_CALL | pec;
+			read_write = I2C_SMBUS_READ;
+			break;
+
+		case I2C_SMBUS_BLOCK_PROC_CALL:
+			protocol |= pec;
+			len = min_t(u8, data->block[0], 31);
+			amd_ec_write(smbus, AMD_SMB_CMD, command);
+			amd_ec_write(smbus, AMD_SMB_BCNT, len);
+			for (i = 0; i < len; i++)
+				amd_ec_write(smbus, AMD_SMB_DATA + i, data->block[i + 1]);
+			protocol = AMD_SMB_PRTCL_BLOCK_PROC_CALL | pec;
+			read_write = I2C_SMBUS_READ;
+			break;
+
+		case I2C_SMBUS_WORD_DATA_PEC:
+		case I2C_SMBUS_BLOCK_DATA_PEC:
+		case I2C_SMBUS_PROC_CALL_PEC:
+		case I2C_SMBUS_BLOCK_PROC_CALL_PEC:
+			dev_warn(&adap->dev, "Unexpected software PEC transaction %d\n.", size);
+			return -1;
+
+		default:
+			dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
+			return -1;
+	}
+
+	amd_ec_write(smbus, AMD_SMB_ADDR, addr << 1);
+	amd_ec_write(smbus, AMD_SMB_PRTCL, protocol);
+
+	amd_ec_read(smbus, AMD_SMB_STS, temp + 0);
+
+	if (~temp[0] & AMD_SMB_STS_DONE) {
+		udelay(500);
+		amd_ec_read(smbus, AMD_SMB_STS, temp + 0);
+	}
+
+	if (~temp[0] & AMD_SMB_STS_DONE) {
+		msleep(1);
+		amd_ec_read(smbus, AMD_SMB_STS, temp + 0);
+	}
+
+	if ((~temp[0] & AMD_SMB_STS_DONE) || (temp[0] & AMD_SMB_STS_STATUS))
+		return -1;
+
+	if (read_write == I2C_SMBUS_WRITE)
+		return 0;
+
+	switch (size) {
+
+		case I2C_SMBUS_BYTE:
+		case I2C_SMBUS_BYTE_DATA:
+			amd_ec_read(smbus, AMD_SMB_DATA, &data->byte);
+			break;
+
+		case I2C_SMBUS_WORD_DATA:
+		case I2C_SMBUS_PROC_CALL:
+			amd_ec_read(smbus, AMD_SMB_DATA, temp + 0);
+			amd_ec_read(smbus, AMD_SMB_DATA + 1, temp + 1);
+			data->word = (temp[1] << 8) | temp[0];
+			break;
+
+		case I2C_SMBUS_BLOCK_DATA:
+		case I2C_SMBUS_BLOCK_PROC_CALL:
+			amd_ec_read(smbus, AMD_SMB_BCNT, &len);
+			len = min_t(u8, len, 32);
+		case I2C_SMBUS_I2C_BLOCK_DATA:
+			for (i = 0; i < len; i++)
+				amd_ec_read(smbus, AMD_SMB_DATA + i, data->block + i + 1);
+			data->block[0] = len;
+			break;
+	}
+
+	return 0;
+}
+
+
+static u32 amd8111_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 |
+		I2C_FUNC_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_PROC_CALL |
+		I2C_FUNC_SMBUS_I2C_BLOCK | I2C_FUNC_SMBUS_HWPEC_CALC;
+}
+
+static struct i2c_algorithm smbus_algorithm = {
+	.name = "Non-I2C SMBus 2.0 adapter",
+	.id = I2C_ALGO_SMBUS,
+	.smbus_xfer = amd8111_access,
+	.functionality = amd8111_func,
+};
+
+
+static struct pci_device_id amd8111_ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_SMBUS2) },
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE (pci, amd8111_ids);
+
+static int __devinit amd8111_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct amd_smbus *smbus;
+	int error = -ENODEV;
+
+	if (~pci_resource_flags(dev, 0) & IORESOURCE_IO)
+		return -ENODEV;
+
+	smbus = kmalloc(sizeof(struct amd_smbus), GFP_KERNEL);
+	if (!smbus)
+		return -ENOMEM;
+	memset(smbus, 0, sizeof(struct amd_smbus));
+
+	smbus->dev = dev;
+	smbus->base = pci_resource_start(dev, 0);
+	smbus->size = pci_resource_len(dev, 0);
+
+	if (!request_region(smbus->base, smbus->size, "amd8111 SMBus 2.0"))
+		goto out_kfree;
+
+	smbus->adapter.owner = THIS_MODULE;
+	snprintf(smbus->adapter.name, I2C_NAME_SIZE,
+		"SMBus2 AMD8111 adapter at %04x", smbus->base);
+	smbus->adapter.class = I2C_CLASS_HWMON;
+	smbus->adapter.algo = &smbus_algorithm;
+	smbus->adapter.algo_data = smbus;
+
+	/* set up the driverfs linkage to our parent device */
+	smbus->adapter.dev.parent = &dev->dev;
+
+	error = i2c_add_adapter(&smbus->adapter);
+	if (error)
+		goto out_release_region;
+
+	pci_write_config_dword(smbus->dev, AMD_PCI_MISC, 0);
+	pci_set_drvdata(dev, smbus);
+	return 0;
+
+ out_release_region:
+	release_region(smbus->base, smbus->size);
+ out_kfree:
+	kfree(smbus);
+	return -1;
+}
+
+
+static void __devexit amd8111_remove(struct pci_dev *dev)
+{
+	struct amd_smbus *smbus = pci_get_drvdata(dev);
+
+	i2c_del_adapter(&smbus->adapter);
+	release_region(smbus->base, smbus->size);
+	kfree(smbus);
+}
+
+static struct pci_driver amd8111_driver = {
+	.name		= "amd8111_smbus2",
+	.id_table	= amd8111_ids,
+	.probe		= amd8111_probe,
+	.remove		= __devexit_p(amd8111_remove),
+};
+
+static int __init i2c_amd8111_init(void)
+{
+	return pci_register_driver(&amd8111_driver);
+}
+
+
+static void __exit i2c_amd8111_exit(void)
+{
+	pci_unregister_driver(&amd8111_driver);
+}
+
+module_init(i2c_amd8111_init);
+module_exit(i2c_amd8111_exit);