[PATCH] USB: rename Cypress CY7C63xxx driver to proper name and fix up some tiny things

This is a new driver for the Cypress CY7C63xxx mirco controller series.
It currently supports the pre-programmed CYC63001A-PC by AK Modul-Bus
GmbH.  It's based on a kernel 2.4 driver (cyport) by Marcus Maul which I
ported to kernel 2.6 using sysfs. I intend to support more controllers
of this family (and more features) as soon as I get hold of the required
IDs etc. Please see the source code's header for more information.
Signed-off-by: Oliver Bock <o.bock@fh-wolfenbuettel.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/Makefile

@@ -48,7 +48,7 @@ obj-$(CONFIG_USB_MICROTEK)	+= image/
 obj-$(CONFIG_USB_SERIAL)	+= serial/
 
 obj-$(CONFIG_USB_AUERSWALD)	+= misc/
-obj-$(CONFIG_USB_CY7C63)	+= misc/
+obj-$(CONFIG_USB_CYPRESS_CY7C63)+= misc/
 obj-$(CONFIG_USB_CYTHERM)	+= misc/
 obj-$(CONFIG_USB_EMI26)		+= misc/
 obj-$(CONFIG_USB_EMI62)		+= misc/

drivers/usb/misc/Kconfig

@@ -88,19 +88,19 @@ config USB_LED
 	  To compile this driver as a module, choose M here: the
 	  module will be called usbled.
 
-config USB_CY7C63
+config USB_CYPRESS_CY7C63
 	tristate "Cypress CY7C63xxx USB driver support"
 	depends on USB
 	help
 	  Say Y here if you want to connect a Cypress CY7C63xxx
-	  micro controller to your computer's USB port. This driver
-	  supports the pre-programmed devices (incl. firmware) by
-	  AK Modul-Bus Computer GmbH.
+	  micro controller to your computer's USB port. Currently this
+	  driver supports the pre-programmed devices (incl. firmware)
+	  by AK Modul-Bus Computer GmbH.
 
 	  Please see: http://www.ak-modul-bus.de/stat/mikrocontroller.html
 
 	  To compile this driver as a module, choose M here: the
-	  module will be called cy7c63.
+	  module will be called cypress_cy7c63.
 
 config USB_CYTHERM
 	tristate "Cypress USB thermometer driver support"

drivers/usb/misc/Makefile

@@ -4,7 +4,7 @@
 #
 
 obj-$(CONFIG_USB_AUERSWALD)	+= auerswald.o
-obj-$(CONFIG_USB_CY7C63)	+= cy7c63.o
+obj-$(CONFIG_USB_CYPRESS_CY7C63)+= cypress_cy7c63.o
 obj-$(CONFIG_USB_CYTHERM)	+= cytherm.o
 obj-$(CONFIG_USB_EMI26)		+= emi26.o
 obj-$(CONFIG_USB_EMI62)		+= emi62.o

drivers/usb/misc/cy7c63.c → drivers/usb/misc/cypress_cy7c63.c

 /*
-* cy7c63.c
+* cypress_cy7c63.c
 *
-* Copyright (c) 2006 Oliver Bock (bock@fh-wolfenbuettel.de)
+* Copyright (c) 2006 Oliver Bock (o.bock@fh-wolfenbuettel.de)
 *
-*	This driver is based on the Cypress Thermometer USB Driver by
-*	Marcus Maul and the 2.0 version of Greg Kroah-Hartman's
+*	This driver is based on the Cypress USB Driver by Marcus Maul
+*	(cyport) and the 2.0 version of Greg Kroah-Hartman's
 *	USB Skeleton driver.
 *
-*	Is is a generic driver for the Cypress CY7C63000 family.
-*	For the time being it enables you to toggle the single I/O ports
-*	of the device.
+*	This is a generic driver for the Cypress CY7C63xxx family.
+*	For the time being it enables you to read from and write to
+*	the single I/O ports of the device.
 *
 *	Supported vendors:	AK Modul-Bus Computer GmbH
 *	Supported devices:	CY7C63001A-PC (to be continued...)
 *	Supported functions:	Read/Write Ports (to be continued...)
 *
-*	Chipsets families:	CY7C63000, CY7C63001, CY7C63100, CY7C63101
-*
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License as
@@ -28,50 +26,50 @@
 #include <linux/kernel.h>
 #include <linux/usb.h>
 
-#define DRIVER_AUTHOR		"Oliver Bock (bock@fh-wolfenbuettel.de)"
+#define DRIVER_AUTHOR		"Oliver Bock (o.bock@fh-wolfenbuettel.de)"
 #define DRIVER_DESC		"Cypress CY7C63xxx USB driver"
 
-#define CY7C63_VENDOR_ID	0xa2c
-#define CY7C63_PRODUCT_ID	0x8
+#define CYPRESS_VENDOR_ID	0xa2c
+#define CYPRESS_PRODUCT_ID	0x8
+
+#define CYPRESS_READ_PORT	0x4
+#define CYPRESS_WRITE_PORT	0x5
 
-#define CY7C63_READ_PORT	0x4
-#define CY7C63_WRITE_PORT	0x5
-#define CY7C63_READ_RAM		0x2
-#define CY7C63_WRITE_RAM	0x3
-#define CY7C63_READ_ROM		0x1
+#define CYPRESS_READ_RAM	0x2
+#define CYPRESS_WRITE_RAM	0x3
+#define CYPRESS_READ_ROM	0x1
 
-#define CY7C63_READ_PORT_ID0	0
-#define CY7C63_WRITE_PORT_ID0	0
-#define CY7C63_READ_PORT_ID1	0x2
-#define CY7C63_WRITE_PORT_ID1	1
+#define CYPRESS_READ_PORT_ID0	0
+#define CYPRESS_WRITE_PORT_ID0	0
+#define CYPRESS_READ_PORT_ID1	0x2
+#define CYPRESS_WRITE_PORT_ID1	1
 
-#define CY7C63_MAX_REQSIZE	8
+#define CYPRESS_MAX_REQSIZE	8
 
 
 /* table of devices that work with this driver */
-static struct usb_device_id cy7c63_table [] = {
-	{ USB_DEVICE(CY7C63_VENDOR_ID, CY7C63_PRODUCT_ID) },
+static struct usb_device_id cypress_table [] = {
+	{ USB_DEVICE(CYPRESS_VENDOR_ID, CYPRESS_PRODUCT_ID) },
 	{ }
 };
-MODULE_DEVICE_TABLE(usb, cy7c63_table);
+MODULE_DEVICE_TABLE(usb, cypress_table);
 
 /* structure to hold all of our device specific stuff */
-struct cy7c63 {
+struct cypress {
 	struct usb_device *	udev;
-	char 			port0;
-	char			port1;
+	unsigned char		port[2];
 };
 
 /* used to send usb control messages to device */
-int vendor_command(struct cy7c63 *dev, unsigned char request,
-			 unsigned char address, unsigned char data) {
-
+static int vendor_command(struct cypress *dev, unsigned char request,
+			  unsigned char address, unsigned char data)
+{
 	int retval = 0;
 	unsigned int pipe;
 	unsigned char *iobuf;
 
 	/* allocate some memory for the i/o buffer*/
-	iobuf = kzalloc(CY7C63_MAX_REQSIZE, GFP_KERNEL);
+	iobuf = kzalloc(CYPRESS_MAX_REQSIZE, GFP_KERNEL);
 	if (!iobuf) {
 		dev_err(&dev->udev->dev, "Out of memory!\n");
 		retval = -ENOMEM;
@@ -84,21 +82,23 @@ int vendor_command(struct cy7c63 *dev, unsigned char request,
 	pipe = usb_rcvctrlpipe(dev->udev, 0);
 	retval = usb_control_msg(dev->udev, pipe, request,
 				 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
-				address, data, iobuf, CY7C63_MAX_REQSIZE,
+				 address, data, iobuf, CYPRESS_MAX_REQSIZE,
 				 USB_CTRL_GET_TIMEOUT);
 
-	/* store returned data (more READs to be added!) */
+	/* store returned data (more READs to be added) */
 	switch (request) {
-		case CY7C63_READ_PORT:
-			if (address == CY7C63_READ_PORT_ID0) {
-				dev->port0 = iobuf[1];
+		case CYPRESS_READ_PORT:
+			if (address == CYPRESS_READ_PORT_ID0) {
+				dev->port[0] = iobuf[1];
 				dev_dbg(&dev->udev->dev,
-					"READ_PORT0 returned: %d\n",dev->port0);
+					"READ_PORT0 returned: %d\n",
+					dev->port[0]);
 			}
-			else if (address == CY7C63_READ_PORT_ID1) {
-				dev->port1 = iobuf[1];
+			else if (address == CYPRESS_READ_PORT_ID1) {
+				dev->port[1] = iobuf[1];
 				dev_dbg(&dev->udev->dev,
-					"READ_PORT1 returned: %d\n",dev->port1);
+					"READ_PORT1 returned: %d\n",
+					dev->port[1]);
 			}
 			break;
 	}
@@ -108,61 +108,96 @@ error:
 	return retval;
 }
 
-#define get_set_port(num,read_id,write_id) \
-static ssize_t set_port##num(struct device *dev, struct device_attribute *attr,	\
-					const char *buf, size_t count) {	\
-										\
-	int value;								\
-	int result = 0;								\
-										\
-	struct usb_interface *intf = to_usb_interface(dev);			\
-	struct cy7c63 *cyp = usb_get_intfdata(intf);				\
-										\
-	dev_dbg(&cyp->udev->dev, "WRITE_PORT%d called\n", num);			\
-										\
-	/* validate input data */						\
-	if (sscanf(buf, "%d", &value) < 1) {					\
-		result = -EINVAL;						\
-		goto error;							\
-	}									\
-	if (value>255 || value<0) {						\
-		result = -EINVAL;						\
-		goto error;							\
-	}									\
-										\
-	result = vendor_command(cyp, CY7C63_WRITE_PORT, write_id,		\
-					 (unsigned char)value);			\
-										\
-	dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n",result);	\
-error:										\
-	return result < 0 ? result : count;					\
-}										\
-										\
-static ssize_t get_port##num(struct device *dev,				\
-				 struct device_attribute *attr, char *buf) {	\
-										\
-	int result = 0;								\
-										\
-	struct usb_interface *intf = to_usb_interface(dev);			\
-	struct cy7c63 *cyp = usb_get_intfdata(intf);				\
-										\
-	dev_dbg(&cyp->udev->dev, "READ_PORT%d called\n", num);			\
-										\
-	result = vendor_command(cyp, CY7C63_READ_PORT, read_id, 0);		\
-										\
-	dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);	\
-										\
-	return sprintf(buf, "%d", cyp->port##num);				\
-}										\
-static DEVICE_ATTR(port##num, S_IWUGO | S_IRUGO, get_port##num, set_port##num);
-
-get_set_port(0, CY7C63_READ_PORT_ID0, CY7C63_WRITE_PORT_ID0);
-get_set_port(1, CY7C63_READ_PORT_ID1, CY7C63_WRITE_PORT_ID1);
-
-static int cy7c63_probe(struct usb_interface *interface,
-			const struct usb_device_id *id) {
-
-	struct cy7c63 *dev = NULL;
+/* write port value */
+static ssize_t write_port(struct device *dev, struct device_attribute *attr,
+			  const char *buf, size_t count,
+			  int port_num, int write_id)
+{
+	int value = -1;
+	int result = 0;
+
+	struct usb_interface *intf = to_usb_interface(dev);
+	struct cypress *cyp = usb_get_intfdata(intf);
+
+	dev_dbg(&cyp->udev->dev, "WRITE_PORT%d called\n", port_num);
+
+	/* validate input data */
+	if (sscanf(buf, "%d", &value) < 1) {
+		result = -EINVAL;
+		goto error;
+	}
+	if (value < 0 || value > 255) {
+		result = -EINVAL;
+		goto error;
+	}
+
+	result = vendor_command(cyp, CYPRESS_WRITE_PORT, write_id,
+				(unsigned char)value);
+
+	dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
+error:
+	return result < 0 ? result : count;
+}
+
+/* attribute callback handler (write) */
+static ssize_t set_port0_handler(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf, size_t count)
+{
+	return write_port(dev, attr, buf, count, 0, CYPRESS_WRITE_PORT_ID0);
+}
+
+/* attribute callback handler (write) */
+static ssize_t set_port1_handler(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf, size_t count)
+{
+	return write_port(dev, attr, buf, count, 1, CYPRESS_WRITE_PORT_ID1);
+}
+
+/* read port value */
+static ssize_t read_port(struct device *dev, struct device_attribute *attr,
+			 char *buf, int port_num, int read_id)
+{
+	int result = 0;
+
+	struct usb_interface *intf = to_usb_interface(dev);
+	struct cypress *cyp = usb_get_intfdata(intf);
+
+	dev_dbg(&cyp->udev->dev, "READ_PORT%d called\n", port_num);
+
+	result = vendor_command(cyp, CYPRESS_READ_PORT, read_id, 0);
+
+	dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
+
+	return sprintf(buf, "%d", cyp->port[port_num]);
+}
+
+/* attribute callback handler (read) */
+static ssize_t get_port0_handler(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	return read_port(dev, attr, buf, 0, CYPRESS_READ_PORT_ID0);
+}
+
+/* attribute callback handler (read) */
+static ssize_t get_port1_handler(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	return read_port(dev, attr, buf, 1, CYPRESS_READ_PORT_ID1);
+}
+
+static DEVICE_ATTR(port0, S_IWUGO | S_IRUGO,
+		   get_port0_handler, set_port0_handler);
+
+static DEVICE_ATTR(port1, S_IWUGO | S_IRUGO,
+		   get_port1_handler, set_port1_handler);
+
+
+static int cypress_probe(struct usb_interface *interface,
+			 const struct usb_device_id *id)
+{
+	struct cypress *dev = NULL;
 	int retval = -ENOMEM;
 
 	/* allocate memory for our device state and initialize it */
@@ -181,7 +216,7 @@ static int cy7c63_probe(struct usb_interface *interface,
 	device_create_file(&interface->dev, &dev_attr_port0);
 	device_create_file(&interface->dev, &dev_attr_port1);
 
-	/* let the user know what node this device is now attached to */
+	/* let the user know that the device is now attached */
 	dev_info(&interface->dev,
 		 "Cypress CY7C63xxx device now attached\n");
 
@@ -190,9 +225,9 @@ error:
 	return retval;
 }
 
-static void cy7c63_disconnect(struct usb_interface *interface) {
-
-	struct cy7c63 *dev;
+static void cypress_disconnect(struct usb_interface *interface)
+{
+	struct cypress *dev;
 
 	dev = usb_get_intfdata(interface);
 	usb_set_intfdata(interface, NULL);
@@ -209,19 +244,19 @@ static void cy7c63_disconnect(struct usb_interface *interface) {
 	kfree(dev);
 }
 
-static struct usb_driver cy7c63_driver = {
-	.name = "cy7c63",
-	.probe = cy7c63_probe,
-	.disconnect = cy7c63_disconnect,
-	.id_table = cy7c63_table,
+static struct usb_driver cypress_driver = {
+	.name = "cypress_cy7c63",
+	.probe = cypress_probe,
+	.disconnect = cypress_disconnect,
+	.id_table = cypress_table,
 };
 
-static int __init cy7c63_init(void) {
-
+static int __init cypress_init(void)
+{
 	int result;
 
 	/* register this driver with the USB subsystem */
-	result = usb_register(&cy7c63_driver);
+	result = usb_register(&cypress_driver);
 	if (result) {
 		err("Function usb_register failed! Error number: %d\n", result);
 	}
@@ -229,14 +264,14 @@ static int __init cy7c63_init(void) {
 	return result;
 }
 
-static void __exit cy7c63_exit(void) {
-
+static void __exit cypress_exit(void)
+{
 	/* deregister this driver with the USB subsystem */
-	usb_deregister(&cy7c63_driver);
+	usb_deregister(&cypress_driver);
 }
 
-module_init(cy7c63_init);
-module_exit(cy7c63_exit);
+module_init(cypress_init);
+module_exit(cypress_exit);
 
 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);