Yet more i2c driver changes for 2.5.69

diff -Nru a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
@@ -269,7 +269,7 @@
 
 	if (temp & 0x04) {
 		result = -1;
-		dev_err(&piix4_adapter.dev, "Error: no response!\n");
+		dev_dbg(&piix4_adapter.dev, "Error: no response!\n");
 	}
 
 	if (inb_p(SMBHSTSTS) != 0x00)

@@ -467,7 +467,7 @@
 
 
 static struct pci_driver piix4_driver = {
-	.name		= "piix4 smbus",
+	.name		= "piix4-smbus",
 	.id_table	= piix4_ids,
 	.probe		= piix4_probe,
 	.remove		= __devexit_p(piix4_remove),

376 lines not on this page · raw message

diff -Nru a/drivers/pci/quirks.c b/drivers/pci/quirks.c
@@ -647,6 +647,37 @@
 }
 
 /*
+ * SiS 96x south bridge: BIOS typically hides SMBus device...
+ */
+static void __init quirk_sis_96x_smbus(struct pci_dev *dev)
+{
+	u8 val = 0;
+	printk(KERN_INFO "Enabling SiS 96x SMBus.\n");
+	pci_read_config_byte(dev, 0x77, &val);
+	pci_write_config_byte(dev, 0x77, val & ~0x10);
+	pci_read_config_byte(dev, 0x77, &val);
+}
+
+/*
+ * ... This is further complicated by the fact that some SiS96x south
+ * bridges pretend to be 85C503/5513 instead.  In that case see if we
+ * spotted a compatible north bridge to make sure.
+ * (pci_find_device doesn't work yet)
+ */
+static int __devinitdata sis_96x_compatible = 0;
+
+static void __init quirk_sis_503_smbus(struct pci_dev *dev)
+{
+	if (sis_96x_compatible)
+		quirk_sis_96x_smbus(dev);
+}
+
+static void __init quirk_sis_96x_compatible(struct pci_dev *dev)
+{
+	sis_96x_compatible = 1;
+}
+
+/*
  *  The main table of quirks.
  */
 

@@ -679,6 +710,15 @@
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_INTEL, 	PCI_DEVICE_ID_INTEL_82443BX_2, 	quirk_natoma },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_5597,		quirk_nopcipci },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_496,		quirk_nopcipci },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_503,		quirk_sis_503_smbus },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_645,		quirk_sis_96x_compatible },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_646,		quirk_sis_96x_compatible },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_648,		quirk_sis_96x_compatible },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_650,		quirk_sis_96x_compatible },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_651,		quirk_sis_96x_compatible },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_961,		quirk_sis_96x_smbus },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_962,		quirk_sis_96x_smbus },
+	{ PCI_FIXUP_HEADER,	PCI_VENDOR_ID_SI,	PCI_DEVICE_ID_SI_963,		quirk_sis_96x_smbus },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_AL, 	PCI_DEVICE_ID_AL_M1647, 	quirk_alimagik },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_AL, 	PCI_DEVICE_ID_AL_M1651, 	quirk_alimagik },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8363_0,	quirk_vialatency },

diff -Nru a/include/linux/i2c-id.h b/include/linux/i2c-id.h
@@ -245,7 +245,7 @@
 #define I2C_HW_SMBUS_SIS5595	0x06
 #define I2C_HW_SMBUS_ALI1535	0x07
 #define I2C_HW_SMBUS_SIS630	0x08
-#define I2C_HW_SMBUS_SIS645	0x09
+#define I2C_HW_SMBUS_SIS96X	0x09
 #define I2C_HW_SMBUS_AMD8111	0x0a
 #define I2C_HW_SMBUS_SCX200	0x0b
 #define I2C_HW_SMBUS_NFORCE2	0x0c

diff -Nru a/include/linux/pci_ids.h b/include/linux/pci_ids.h
@@ -569,6 +569,9 @@
 #define PCI_DEVICE_ID_SI_751		0x0751
 #define PCI_DEVICE_ID_SI_752		0x0752
 #define PCI_DEVICE_ID_SI_900		0x0900
+#define PCI_DEVICE_ID_SI_961		0x0961
+#define PCI_DEVICE_ID_SI_962		0x0962
+#define PCI_DEVICE_ID_SI_963		0x0963
 #define PCI_DEVICE_ID_SI_5107		0x5107
 #define PCI_DEVICE_ID_SI_5300		0x5300
 #define PCI_DEVICE_ID_SI_5511		0x5511

diff -Nru a/drivers/i2c/chips/it87.c b/drivers/i2c/chips/it87.c
@@ -630,7 +630,6 @@
 			}
 		}
 	}
-	memset (new_client, 0x00, sizeof(struct i2c_client) + sizeof(struct it87_data));
 
 	/* OK. For now, we presume we have a valid client. We now create the
 	   client structure, even though we cannot fill it completely yet.

diff -Nru a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
@@ -3,6 +3,7 @@
 
     Copyright (C) 1995-97 Simon G. Vogl
     Copyright (C) 1998-99 Frodo Looijaard <[email protected]>
+    Copyright (C) 2003 Greg Kroah-Hartman <[email protected]>
 
     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

@@ -28,8 +29,6 @@
 /* The devfs code is contributed by Philipp Matthias Hahn 
    <[email protected]> */
 
-/* $Id: i2c-dev.c,v 1.53 2003/01/21 08:08:16 kmalkki Exp $ */
-
 /* If you want debugging uncomment: */
 /* #define DEBUG 1 */
 

@@ -44,54 +43,84 @@
 #include <linux/i2c-dev.h>
 #include <asm/uaccess.h>
 
-/* struct file_operations changed too often in the 2.1 series for nice code */
-
-static ssize_t i2cdev_read (struct file *file, char *buf, size_t count, 
-                            loff_t *offset);
-static ssize_t i2cdev_write (struct file *file, const char *buf, size_t count, 
-                             loff_t *offset);
-
-static int i2cdev_ioctl (struct inode *inode, struct file *file, 
-                         unsigned int cmd, unsigned long arg);
-static int i2cdev_open (struct inode *inode, struct file *file);
-
-static int i2cdev_release (struct inode *inode, struct file *file);
-
-static int i2cdev_attach_adapter(struct i2c_adapter *adap);
-static int i2cdev_detach_adapter(struct i2c_adapter *adap);
-static int i2cdev_detach_client(struct i2c_client *client);
-static int i2cdev_command(struct i2c_client *client, unsigned int cmd,
-                           void *arg);
+static struct i2c_client i2cdev_client_template;
 
-static struct file_operations i2cdev_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.read		= i2cdev_read,
-	.write		= i2cdev_write,
-	.ioctl		= i2cdev_ioctl,
-	.open		= i2cdev_open,
-	.release	= i2cdev_release,
+struct i2c_dev {
+	int minor;
+	struct i2c_adapter *adap;
+	struct class_device class_dev;
 };
+#define to_i2c_dev(d) container_of(d, struct i2c_dev, class_dev)
 
-static struct i2c_driver i2cdev_driver = {
-	.owner		= THIS_MODULE,
-	.name		= "dev driver",
-	.id		= I2C_DRIVERID_I2CDEV,
-	.flags		= I2C_DF_NOTIFY,
-	.attach_adapter	= i2cdev_attach_adapter,
-	.detach_adapter	= i2cdev_detach_adapter,
-	.detach_client	= i2cdev_detach_client,
-	.command	= i2cdev_command,
-};
+#define I2C_MINORS	256
+static struct i2c_dev *i2c_dev_array[I2C_MINORS];
+static spinlock_t i2c_dev_array_lock = SPIN_LOCK_UNLOCKED;
 
-static struct i2c_client i2cdev_client_template = {
-	.dev		= {
-		.name	= "I2C /dev entry",
-	},
-	.id		= 1,
-	.addr		= -1,
-	.driver		= &i2cdev_driver,
-};
+struct i2c_dev *i2c_dev_get_by_minor(unsigned index)
+{
+	struct i2c_dev *i2c_dev;
+
+	spin_lock(&i2c_dev_array_lock);
+	i2c_dev = i2c_dev_array[index];
+	spin_unlock(&i2c_dev_array_lock);
+	return i2c_dev;
+}
+
+struct i2c_dev *i2c_dev_get_by_adapter(struct i2c_adapter *adap)
+{
+	struct i2c_dev *i2c_dev = NULL;
+	int i;
+
+	spin_lock(&i2c_dev_array_lock);
+	for (i = 0; i < I2C_MINORS; ++i) {
+		if ((i2c_dev_array[i]) &&
+		    (i2c_dev_array[i]->adap == adap)) {
+			i2c_dev = i2c_dev_array[i];
+			break;
+		}
+	}
+	spin_unlock(&i2c_dev_array_lock);
+	return i2c_dev;
+}
+
+static struct i2c_dev *get_free_i2c_dev(void)
+{
+	struct i2c_dev *i2c_dev;
+	unsigned int i;
+
+	i2c_dev = kmalloc(sizeof(*i2c_dev), GFP_KERNEL);
+	if (!i2c_dev)
+		return ERR_PTR(-ENOMEM);
+	memset(i2c_dev, 0x00, sizeof(*i2c_dev));
+
+	spin_lock(&i2c_dev_array_lock);
+	for (i = 0; i < I2C_MINORS; ++i) {
+		if (i2c_dev_array[i])
+			continue;
+		i2c_dev->minor = i;
+		i2c_dev_array[i] = i2c_dev;
+		spin_unlock(&i2c_dev_array_lock);
+		return i2c_dev;
+	}
+	spin_unlock(&i2c_dev_array_lock);
+	kfree(i2c_dev);
+	return ERR_PTR(-ENODEV);
+}
+
+static void return_i2c_dev(struct i2c_dev *i2c_dev)
+{
+	spin_lock(&i2c_dev_array_lock);
+	i2c_dev_array[i2c_dev->minor] = NULL;
+	spin_unlock(&i2c_dev_array_lock);
+	kfree(i2c_dev);
+}
+
+static ssize_t show_dev(struct class_device *class_dev, char *buf)
+{
+	struct i2c_dev *i2c_dev = to_i2c_dev(class_dev);
+	return sprintf(buf, "%04x\n", MKDEV(I2C_MAJOR, i2c_dev->minor));
+}
+static CLASS_DEVICE_ATTR(dev, S_IRUGO, show_dev, NULL);
 
 static ssize_t i2cdev_read (struct file *file, char *buf, size_t count,
                             loff_t *offset)

@@ -104,7 +133,6 @@
 	if (count > 8192)
 		count = 8192;
 
-	/* copy user space data to kernel space. */
 	tmp = kmalloc(count,GFP_KERNEL);
 	if (tmp==NULL)
 		return -ENOMEM;

@@ -129,7 +157,6 @@
 	if (count > 8192)
 		count = 8192;
 
-	/* copy user space data to kernel space. */
 	tmp = kmalloc(count,GFP_KERNEL);
 	if (tmp==NULL)
 		return -ENOMEM;

@@ -157,7 +184,7 @@
 	int i,datasize,res;
 	unsigned long funcs;
 
-	pr_debug("i2c-dev.o: i2c-%d ioctl, cmd: 0x%x, arg: %lx.\n",
+	dev_dbg(&client->dev, "i2c-%d ioctl, cmd: 0x%x, arg: %lx.\n",
 		minor(inode->i_rdev),cmd, arg);
 
 	switch ( cmd ) {

@@ -242,13 +269,11 @@
 				rdwr_arg.nmsgs);
 		}
 		while(i-- > 0) {
-			if( res>=0 && (rdwr_pa[i].flags & I2C_M_RD))
-			{
+			if( res>=0 && (rdwr_pa[i].flags & I2C_M_RD)) {
 				if(copy_to_user(
 					rdwr_arg.msgs[i].buf,
 					rdwr_pa[i].buf,
-					rdwr_pa[i].len))
-				{
+					rdwr_pa[i].len)) {
 					res = -EFAULT;
 				}
 			}

@@ -340,9 +365,14 @@
 	unsigned int minor = minor(inode->i_rdev);
 	struct i2c_client *client;
 	struct i2c_adapter *adap;
+	struct i2c_dev *i2c_dev;
 
-	adap = i2c_get_adapter(minor);
-	if (NULL == adap)
+	i2c_dev = i2c_dev_get_by_minor(minor);
+	if (!i2c_dev)
+		return -ENODEV;
+
+	adap = i2c_get_adapter(i2c_dev->adap->nr);
+	if (!adap)
 		return -ENODEV;
 
 	client = kmalloc(sizeof(*client), GFP_KERNEL);

@@ -370,29 +400,68 @@
 	return 0;
 }
 
-int i2cdev_attach_adapter(struct i2c_adapter *adap)
+static struct file_operations i2cdev_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.read		= i2cdev_read,
+	.write		= i2cdev_write,
+	.ioctl		= i2cdev_ioctl,
+	.open		= i2cdev_open,
+	.release	= i2cdev_release,
+};
+
+static struct class i2c_dev_class = {
+	.name	= "i2c-dev",
+};
+
+static int i2cdev_attach_adapter(struct i2c_adapter *adap)
 {
-	int i;
+	struct i2c_dev *i2c_dev;
+	int retval;
 
-	i = i2c_adapter_id(adap);
-	devfs_mk_cdev(MKDEV(I2C_MAJOR, i),
-			S_IFCHR|S_IRUSR|S_IWUSR, "i2c/%d", i);
-	dev_dbg(&adap->dev, "Registered as minor %d\n", i);
+	i2c_dev = get_free_i2c_dev();
+	if (IS_ERR(i2c_dev))
+		return PTR_ERR(i2c_dev);
+
+	devfs_mk_cdev(MKDEV(I2C_MAJOR, i2c_dev->minor),
+			S_IFCHR|S_IRUSR|S_IWUSR, "i2c/%d", i2c_dev->minor);
+	dev_dbg(&adap->dev, "Registered as minor %d\n", i2c_dev->minor);
+
+	/* register this i2c device with the driver core */
+	i2c_dev->adap = adap;
+	if (adap->dev.parent == &legacy_bus)
+		i2c_dev->class_dev.dev = &adap->dev;
+	else
+		i2c_dev->class_dev.dev = adap->dev.parent;
+	i2c_dev->class_dev.class = &i2c_dev_class;
+	snprintf(i2c_dev->class_dev.class_id, BUS_ID_SIZE, "i2c-%d", i2c_dev->minor);
+	retval = class_device_register(&i2c_dev->class_dev);
+	if (retval)
+		goto error;
+	class_device_create_file(&i2c_dev->class_dev, &class_device_attr_dev);
 	return 0;
+error:
+	return_i2c_dev(i2c_dev);
+	return retval;
 }
 
-int i2cdev_detach_adapter(struct i2c_adapter *adap)
+static int i2cdev_detach_adapter(struct i2c_adapter *adap)
 {
-	int i;
+	struct i2c_dev *i2c_dev;
 
-	i = i2c_adapter_id(adap);
+	i2c_dev = i2c_dev_get_by_adapter(adap);
+	if (!i2c_dev)
+		return -ENODEV;
+
+	class_device_unregister(&i2c_dev->class_dev);
+	devfs_remove("i2c/%d", i2c_dev->minor);
+	return_i2c_dev(i2c_dev);
 
-	devfs_remove("i2c/%d", i);
 	dev_dbg(&adap->dev, "Adapter unregistered\n");
 	return 0;
 }
 
-int i2cdev_detach_client(struct i2c_client *client)
+static int i2cdev_detach_client(struct i2c_client *client)
 {
 	return 0;
 }

@@ -403,7 +472,27 @@
 	return -1;
 }
 
-int __init i2c_dev_init(void)
+static struct i2c_driver i2cdev_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "dev driver",
+	.id		= I2C_DRIVERID_I2CDEV,
+	.flags		= I2C_DF_NOTIFY,
+	.attach_adapter	= i2cdev_attach_adapter,
+	.detach_adapter	= i2cdev_detach_adapter,
+	.detach_client	= i2cdev_detach_client,
+	.command	= i2cdev_command,
+};
+
+static struct i2c_client i2cdev_client_template = {
+	.dev		= {
+		.name	= "I2C /dev entry",
+	},
+	.id		= 1,
+	.addr		= -1,
+	.driver		= &i2cdev_driver,
+};
+
+static int __init i2c_dev_init(void)
 {
 	int res;
 

@@ -416,6 +505,7 @@
 		return -EIO;
 	}
 	devfs_mk_dir("i2c");
+	class_register(&i2c_dev_class);
 	if ((res = i2c_add_driver(&i2cdev_driver))) {
 		printk(KERN_ERR "i2c-dev.o: Driver registration failed, module not inserted.\n");
 		devfs_remove("i2c");

@@ -428,11 +518,13 @@
 static void __exit i2c_dev_exit(void)
 {
 	i2c_del_driver(&i2cdev_driver);
+	class_unregister(&i2c_dev_class);
 	devfs_remove("i2c");
 	unregister_chrdev(I2C_MAJOR,"i2c");
 }
 
-MODULE_AUTHOR("Frodo Looijaard <[email protected]> and Simon G. Vogl <[email protected]>");
+MODULE_AUTHOR("Frodo Looijaard <[email protected]> and "
+		"Simon G. Vogl <[email protected]>");
 MODULE_DESCRIPTION("I2C /dev entries driver");
 MODULE_LICENSE("GPL");