USB: Put phidgets driver in a sysfs class

This patch creates a device class phidget and add the phidget drivers to 
them.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/misc/Kconfig

@@ -115,9 +115,16 @@ config USB_CYTHERM
 	  To compile this driver as a module, choose M here: the
 	  module will be called cytherm.
 
+config USB_PHIDGET
+	tristate "USB Phidgets drivers"
+	depends on USB
+	help
+	  Say Y here to enable the various drivers for devices from
+	  Phidgets inc.
+
 config USB_PHIDGETKIT
 	tristate "USB PhidgetInterfaceKit support"
-	depends on USB
+	depends on USB_PHIDGET
 	help
 	  Say Y here if you want to connect a PhidgetInterfaceKit USB device
 	  from Phidgets Inc.
@@ -127,7 +134,7 @@ config USB_PHIDGETKIT
 
 config USB_PHIDGETMOTORCONTROL
 	tristate "USB PhidgetMotorControl support"
-	depends on USB
+	depends on USB_PHIDGET
 	help
 	  Say Y here if you want to connect a PhidgetMotorControl USB device
 	  from Phidgets Inc.
@@ -137,7 +144,7 @@ config USB_PHIDGETMOTORCONTROL
 
 config USB_PHIDGETSERVO
 	tristate "USB PhidgetServo support"
-	depends on USB
+	depends on USB_PHIDGET
 	help
 	  Say Y here if you want to connect an 1 or 4 Motor PhidgetServo 
 	  servo controller version 2.0 or 3.0.

drivers/usb/misc/Makefile

@@ -13,6 +13,7 @@ obj-$(CONFIG_USB_LCD)		+= usblcd.o
 obj-$(CONFIG_USB_LD)		+= ldusb.o
 obj-$(CONFIG_USB_LED)		+= usbled.o
 obj-$(CONFIG_USB_LEGOTOWER)	+= legousbtower.o
+obj-$(CONFIG_USB_PHIDGET)	+= phidget.o
 obj-$(CONFIG_USB_PHIDGETKIT)	+= phidgetkit.o
 obj-$(CONFIG_USB_PHIDGETMOTORCONTROL)	+= phidgetmotorcontrol.o
 obj-$(CONFIG_USB_PHIDGETSERVO)	+= phidgetservo.o

drivers/usb/misc/phidget.c

+/*
+ * USB Phidgets class
+ *
+ * Copyright (C) 2006  Sean Young <sean@mess.org>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/device.h>
+
+struct class *phidget_class;
+
+static int __init init_phidget(void)
+{
+	phidget_class = class_create(THIS_MODULE, "phidget");
+
+	if (IS_ERR(phidget_class))
+		return PTR_ERR(phidget_class);
+
+	return 0;
+}
+
+static void __exit cleanup_phidget(void)
+{
+	class_destroy(phidget_class);
+}
+
+EXPORT_SYMBOL_GPL(phidget_class);
+
+module_init(init_phidget);
+module_exit(cleanup_phidget);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Sean Young <sean@mess.org>");
+MODULE_DESCRIPTION("Container module for phidget class");
+

drivers/usb/misc/phidget.h

+/*
+ * USB Phidgets class
+ *
+ * Copyright (C) 2006  Sean Young <sean@mess.org>
+ *
+ * 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.
+ */
+
+extern struct class *phidget_class;

drivers/usb/misc/phidgetmotorcontrol.c

@@ -15,6 +15,8 @@
 #include <linux/module.h>
 #include <linux/usb.h>
 
+#include "phidget.h"
+
 #define DRIVER_AUTHOR "Sean Young <sean@mess.org>"
 #define DRIVER_DESC "USB PhidgetMotorControl Driver"
 
@@ -23,9 +25,13 @@
 
 #define URB_INT_SIZE			8
 
+static unsigned long device_no;
+
 struct motorcontrol {
 	struct usb_device *udev;
 	struct usb_interface *intf;
+	struct device *dev;
+	int dev_no;
 	u8 inputs[4];
 	s8 desired_speed[2];
 	s8 speed[2];
@@ -162,14 +168,14 @@ static void do_notify(void *data)
 	for (i=0; i<4; i++) {
 		if (test_and_clear_bit(i, &mc->input_events)) {
 			sprintf(sysfs_file, "input%d", i);
-			sysfs_notify(&mc->intf->dev.kobj, NULL, sysfs_file);
+			sysfs_notify(&mc->dev->kobj, NULL, sysfs_file);
 		}
 	}
 
 	for (i=0; i<2; i++) {
 		if (test_and_clear_bit(i, &mc->speed_events)) {
 			sprintf(sysfs_file, "speed%d", i);
-			sysfs_notify(&mc->intf->dev.kobj, NULL, sysfs_file);
+			sysfs_notify(&mc->dev->kobj, NULL, sysfs_file);
 		}
 	}
 
@@ -182,10 +188,10 @@ static void do_notify(void *data)
 
 #define show_set_speed(value)		\
 static ssize_t set_speed##value(struct device *dev,			\
-	struct device_attribute *attr, const char *buf,	size_t count)	\
+					struct device_attribute *attr,	\
+					const char *buf, size_t count)	\
 {									\
-	struct usb_interface *intf = to_usb_interface(dev);		\
-	struct motorcontrol *mc = usb_get_intfdata(intf);		\
+	struct motorcontrol *mc = dev_get_drvdata(dev);			\
 	int speed;							\
 	int retval;							\
 									\
@@ -203,10 +209,10 @@ static ssize_t set_speed##value(struct device *dev, 			\
 }									\
 									\
 static ssize_t show_speed##value(struct device *dev,			\
-			struct device_attribute *attr, char *buf)	\
+					struct device_attribute *attr,	\
+					char *buf)			\
 {									\
-	struct usb_interface *intf = to_usb_interface(dev);		\
-	struct motorcontrol *mc = usb_get_intfdata(intf);		\
+	struct motorcontrol *mc = dev_get_drvdata(dev);			\
 									\
 	return sprintf(buf, "%d\n", mc->speed[value]);			\
 }									\
@@ -217,10 +223,10 @@ show_set_speed(1);
 
 #define show_set_acceleration(value)		\
 static ssize_t set_acceleration##value(struct device *dev, 		\
-	struct device_attribute *attr, const char *buf,	size_t count)	\
+					struct device_attribute *attr,	\
+					const char *buf, size_t count)	\
 {									\
-	struct usb_interface *intf = to_usb_interface(dev);		\
-	struct motorcontrol *mc = usb_get_intfdata(intf);		\
+	struct motorcontrol *mc = dev_get_drvdata(dev);			\
 	int acceleration;						\
 	int retval;							\
 									\
@@ -238,10 +244,10 @@ static ssize_t set_acceleration##value(struct device *dev, 		\
 }									\
 									\
 static ssize_t show_acceleration##value(struct device *dev,	 	\
-			struct device_attribute *attr, char *buf)	\
+					struct device_attribute *attr,	\
+							char *buf)	\
 {									\
-	struct usb_interface *intf = to_usb_interface(dev);		\
-	struct motorcontrol *mc = usb_get_intfdata(intf);		\
+	struct motorcontrol *mc = dev_get_drvdata(dev);			\
 									\
 	return sprintf(buf, "%d\n", mc->acceleration[value]);		\
 }									\
@@ -252,10 +258,10 @@ show_set_acceleration(1);
 
 #define show_current(value)	\
 static ssize_t show_current##value(struct device *dev,			\
-			struct device_attribute *attr, char *buf)	\
+					struct device_attribute *attr,	\
+					char *buf)			\
 {									\
-	struct usb_interface *intf = to_usb_interface(dev);		\
-	struct motorcontrol *mc = usb_get_intfdata(intf);		\
+	struct motorcontrol *mc = dev_get_drvdata(dev);			\
 									\
 	return sprintf(buf, "%dmA\n", (int)mc->_current[value]);	\
 }									\
@@ -266,10 +272,10 @@ show_current(1);
 
 #define show_input(value)	\
 static ssize_t show_input##value(struct device *dev,			\
-			struct device_attribute *attr, char *buf)	\
+					struct device_attribute *attr,	\
+					char *buf)			\
 {									\
-	struct usb_interface *intf = to_usb_interface(dev);		\
-	struct motorcontrol *mc = usb_get_intfdata(intf);		\
+	struct motorcontrol *mc = dev_get_drvdata(dev);			\
 									\
 	return sprintf(buf, "%d\n", (int)mc->inputs[value]);		\
 }									\
@@ -287,6 +293,7 @@ static int motorcontrol_probe(struct usb_interface *intf, const struct usb_devic
 	struct usb_endpoint_descriptor *endpoint;
 	struct motorcontrol *mc;
 	int pipe, maxp, rc = -ENOMEM;
+	int bit, value;
 
 	interface = intf->cur_altsetting;
 	if (interface->desc.bNumEndpoints != 1)
@@ -306,6 +313,7 @@ static int motorcontrol_probe(struct usb_interface *intf, const struct usb_devic
 	if (!mc)
 		goto out;
 
+	mc->dev_no = -1;
 	mc->data = usb_buffer_alloc(dev, URB_INT_SIZE, SLAB_ATOMIC, &mc->data_dma);
 	if (!mc->data)
 		goto out;
@@ -326,26 +334,42 @@ static int motorcontrol_probe(struct usb_interface *intf, const struct usb_devic
 
 	usb_set_intfdata(intf, mc);
 
+	do {
+		bit = find_first_zero_bit(&device_no, sizeof(device_no));
+		value = test_and_set_bit(bit, &device_no);
+	} while(value);
+	mc->dev_no = bit;
+
+	mc->dev = device_create(phidget_class, &mc->udev->dev, 0,
+				"motorcontrol%d", mc->dev_no);
+	if (IS_ERR(mc->dev)) {
+		rc = PTR_ERR(mc->dev);
+		mc->dev = NULL;
+		goto out;
+	}
+
+	dev_set_drvdata(mc->dev, mc);
+
 	if (usb_submit_urb(mc->irq, GFP_KERNEL)) {
 		rc = -EIO;
 		goto out;
 	}
 
-	device_create_file(&intf->dev, &dev_attr_input0);
-	device_create_file(&intf->dev, &dev_attr_input1);
-	device_create_file(&intf->dev, &dev_attr_input2);
-	device_create_file(&intf->dev, &dev_attr_input3);
+	device_create_file(mc->dev, &dev_attr_input0);
+	device_create_file(mc->dev, &dev_attr_input1);
+	device_create_file(mc->dev, &dev_attr_input2);
+	device_create_file(mc->dev, &dev_attr_input3);
 
-	device_create_file(&intf->dev, &dev_attr_speed0);
-	device_create_file(&intf->dev, &dev_attr_speed1);
+	device_create_file(mc->dev, &dev_attr_speed0);
+	device_create_file(mc->dev, &dev_attr_speed1);
 
-	device_create_file(&intf->dev, &dev_attr_acceleration0);
-	device_create_file(&intf->dev, &dev_attr_acceleration1);
+	device_create_file(mc->dev, &dev_attr_acceleration0);
+	device_create_file(mc->dev, &dev_attr_acceleration1);
 
-	device_create_file(&intf->dev, &dev_attr_current0);
-	device_create_file(&intf->dev, &dev_attr_current1);
+	device_create_file(mc->dev, &dev_attr_current0);
+	device_create_file(mc->dev, &dev_attr_current1);
 
-	dev_info(&intf->dev, "USB Phidget MotorControl attached\n");
+	dev_info(&intf->dev, "USB PhidgetMotorControl attached\n");
 
 	return 0;
 
@@ -355,6 +379,11 @@ out:
 			usb_free_urb(mc->irq);
 		if (mc->data)
 			usb_buffer_free(dev, URB_INT_SIZE, mc->data, mc->data_dma);
+		if (mc->dev)
+			device_unregister(mc->dev);
+		if (mc->dev_no >= 0)
+			clear_bit(mc->dev_no, &device_no);
+
 		kfree(mc);
 	}
 
@@ -376,24 +405,27 @@ static void motorcontrol_disconnect(struct usb_interface *interface)
 
 	cancel_delayed_work(&mc->do_notify);
 
-	device_remove_file(&interface->dev, &dev_attr_input0);
-	device_remove_file(&interface->dev, &dev_attr_input1);
-	device_remove_file(&interface->dev, &dev_attr_input2);
-	device_remove_file(&interface->dev, &dev_attr_input3);
+	device_remove_file(mc->dev, &dev_attr_input0);
+	device_remove_file(mc->dev, &dev_attr_input1);
+	device_remove_file(mc->dev, &dev_attr_input2);
+	device_remove_file(mc->dev, &dev_attr_input3);
 
-	device_remove_file(&interface->dev, &dev_attr_speed0);
-	device_remove_file(&interface->dev, &dev_attr_speed1);
+	device_remove_file(mc->dev, &dev_attr_speed0);
+	device_remove_file(mc->dev, &dev_attr_speed1);
 
-	device_remove_file(&interface->dev, &dev_attr_acceleration0);
-	device_remove_file(&interface->dev, &dev_attr_acceleration1);
+	device_remove_file(mc->dev, &dev_attr_acceleration0);
+	device_remove_file(mc->dev, &dev_attr_acceleration1);
 
-	device_remove_file(&interface->dev, &dev_attr_current0);
-	device_remove_file(&interface->dev, &dev_attr_current1);
+	device_remove_file(mc->dev, &dev_attr_current0);
+	device_remove_file(mc->dev, &dev_attr_current1);
 
-	dev_info(&interface->dev, "USB Phidget MotorControl disconnected\n");
+	device_unregister(mc->dev);
 
 	usb_put_dev(mc->udev);
+	clear_bit(mc->dev_no, &device_no);
 	kfree(mc);
+
+	dev_info(&interface->dev, "USB PhidgetMotorControl detached\n");
 }
 
 static struct usb_driver motorcontrol_driver = {

drivers/usb/misc/phidgetservo.c

@@ -15,14 +15,6 @@
  *
  * CAUTION: Generally you should use 0 < degrees < 180 as anything else
  * is probably beyond the range of your servo and may damage it.
- *
- * Jun 16, 2004: Sean Young <sean@mess.org>
- *  - cleanups
- *  - was using memory after kfree()
- * Aug 8, 2004: Sean Young <sean@mess.org>
- *  - set the highest angle as high as the hardware allows, there are 
- *    some odd servos out there
- *
  */
 
 #include <linux/kernel.h>
@@ -32,6 +24,8 @@
 #include <linux/module.h>
 #include <linux/usb.h>
 
+#include "phidget.h"
+
 #define DRIVER_AUTHOR "Sean Young <sean@mess.org>"
 #define DRIVER_DESC "USB PhidgetServo Driver"
 
@@ -70,8 +64,12 @@ static struct usb_device_id id_table[] = {
 
 MODULE_DEVICE_TABLE(usb, id_table);
 
+static int unsigned long device_no;
+
 struct phidget_servo {
 	struct usb_device *udev;
+	struct device *dev;
+	int dev_no;
 	ulong type;
 	int pulse[4];
 	int degrees[4];
@@ -203,16 +201,16 @@ change_position_v20(struct phidget_servo *servo, int servo_no, int degrees,
 }
 
 #define show_set(value)	\
-static ssize_t set_servo##value (struct device *dev, struct device_attribute *attr,			\
+static ssize_t set_servo##value (struct device *dev, 			\
+					struct device_attribute *attr,	\
 					const char *buf, size_t count)	\
 {									\
 	int degrees, minutes, retval;					\
-	struct usb_interface *intf = to_usb_interface (dev);		\
-	struct phidget_servo *servo = usb_get_intfdata (intf);		\
+	struct phidget_servo *servo = dev_get_drvdata(dev);		\
 									\
 	minutes = 0;							\
 	/* must at least convert degrees */				\
-	if (sscanf (buf, "%d.%d", &degrees, &minutes) < 1) {		\
+	if (sscanf(buf, "%d.%d", &degrees, &minutes) < 1) {		\
 		return -EINVAL;						\
 	}								\
 									\
@@ -220,21 +218,22 @@ static ssize_t set_servo##value (struct device *dev, struct device_attribute *at
 		return -EINVAL;						\
 									\
 	if (servo->type & SERVO_VERSION_30)				\
-		retval = change_position_v30 (servo, value, degrees, 	\
+		retval = change_position_v30(servo, value, degrees, 	\
 							minutes);	\
 	else 								\
-		retval = change_position_v20 (servo, value, degrees, 	\
+		retval = change_position_v20(servo, value, degrees, 	\
 							minutes);	\
 									\
 	return retval < 0 ? retval : count;				\
 }									\
 									\
-static ssize_t show_servo##value (struct device *dev, struct device_attribute *attr, char *buf) 	\
+static ssize_t show_servo##value (struct device *dev,			\
+					struct device_attribute *attr,	\
+					char *buf) 			\
 {									\
-	struct usb_interface *intf = to_usb_interface (dev);		\
-	struct phidget_servo *servo = usb_get_intfdata (intf);		\
+	struct phidget_servo *servo = dev_get_drvdata(dev);		\
 									\
-	return sprintf (buf, "%d.%02d\n", servo->degrees[value],	\
+	return sprintf(buf, "%d.%02d\n", servo->degrees[value],		\
 				servo->minutes[value]);			\
 }									\
 static DEVICE_ATTR(servo##value, S_IWUGO | S_IRUGO,			\
@@ -250,6 +249,7 @@ servo_probe(struct usb_interface *interface, const struct usb_device_id *id)
 {
 	struct usb_device *udev = interface_to_usbdev(interface);
 	struct phidget_servo *dev;
+	int bit, value;
 
 	dev = kzalloc(sizeof (struct phidget_servo), GFP_KERNEL);
 	if (dev == NULL) {
@@ -261,18 +261,33 @@ servo_probe(struct usb_interface *interface, const struct usb_device_id *id)
 	dev->type = id->driver_info;
 	usb_set_intfdata(interface, dev);
 
-	device_create_file(&interface->dev, &dev_attr_servo0);
+        do {
+                bit = find_first_zero_bit(&device_no, sizeof(device_no));
+                value = test_and_set_bit(bit, &device_no);
+        } while(value);
+	dev->dev_no = bit;
+
+	dev->dev = device_create(phidget_class, &dev->udev->dev, 0,
+				 "servo%d", dev->dev_no);
+	if (IS_ERR(dev->dev)) {
+		int rc = PTR_ERR(dev->dev);
+		clear_bit(dev->dev_no, &device_no);
+		kfree(dev);
+		return rc;
+	}
+
+	device_create_file(dev->dev, &dev_attr_servo0);
 	if (dev->type & SERVO_COUNT_QUAD) {
-		device_create_file(&interface->dev, &dev_attr_servo1);
-		device_create_file(&interface->dev, &dev_attr_servo2);
-		device_create_file(&interface->dev, &dev_attr_servo3);
+		device_create_file(dev->dev, &dev_attr_servo1);
+		device_create_file(dev->dev, &dev_attr_servo2);
+		device_create_file(dev->dev, &dev_attr_servo3);
 	}
 
 	dev_info(&interface->dev, "USB %d-Motor PhidgetServo v%d.0 attached\n",
 		dev->type & SERVO_COUNT_QUAD ? 4 : 1,
 		dev->type & SERVO_VERSION_30 ? 3 : 2);
 
-	if(!(dev->type & SERVO_VERSION_30))
+	if (!(dev->type & SERVO_VERSION_30))
 		dev_info(&interface->dev,
 			 "WARNING: v2.0 not tested! Please report if it works.\n");
 
@@ -287,19 +302,21 @@ servo_disconnect(struct usb_interface *interface)
 	dev = usb_get_intfdata(interface);
 	usb_set_intfdata(interface, NULL);
 
-	device_remove_file(&interface->dev, &dev_attr_servo0);
+	device_remove_file(dev->dev, &dev_attr_servo0);
 	if (dev->type & SERVO_COUNT_QUAD) {
-		device_remove_file(&interface->dev, &dev_attr_servo1);
-		device_remove_file(&interface->dev, &dev_attr_servo2);
-		device_remove_file(&interface->dev, &dev_attr_servo3);
+		device_remove_file(dev->dev, &dev_attr_servo1);
+		device_remove_file(dev->dev, &dev_attr_servo2);
+		device_remove_file(dev->dev, &dev_attr_servo3);
 	}
 
+	device_unregister(dev->dev);
 	usb_put_dev(dev->udev);
 
 	dev_info(&interface->dev, "USB %d-Motor PhidgetServo v%d.0 detached\n",
 		dev->type & SERVO_COUNT_QUAD ? 4 : 1,
 		dev->type & SERVO_VERSION_30 ? 3 : 2);
 
+	clear_bit(dev->dev_no, &device_no);
 	kfree(dev);
 }