USB: remove dev->power.power_state
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / misc / cypress_cy7c63.c
blob937940404b7a316600aff66c83e1d36372b81405
1 /*
2 * cypress_cy7c63.c
4 * Copyright (c) 2006-2007 Oliver Bock (bock@tfh-berlin.de)
6 * This driver is based on the Cypress USB Driver by Marcus Maul
7 * (cyport) and the 2.0 version of Greg Kroah-Hartman's
8 * USB Skeleton driver.
10 * This is a generic driver for the Cypress CY7C63xxx family.
11 * For the time being it enables you to read from and write to
12 * the single I/O ports of the device.
14 * Supported vendors: AK Modul-Bus Computer GmbH
15 * (Firmware "Port-Chip")
17 * Supported devices: CY7C63001A-PC
18 * CY7C63001C-PXC
19 * CY7C63001C-SXC
21 * Supported functions: Read/Write Ports
24 * For up-to-date information please visit:
25 * http://www.obock.de/kernel/cypress
27 * This program is free software; you can redistribute it and/or
28 * modify it under the terms of the GNU General Public License as
29 * published by the Free Software Foundation, version 2.
32 #include <linux/init.h>
33 #include <linux/module.h>
34 #include <linux/kernel.h>
35 #include <linux/usb.h>
37 #define DRIVER_AUTHOR "Oliver Bock (bock@tfh-berlin.de)"
38 #define DRIVER_DESC "Cypress CY7C63xxx USB driver"
40 #define CYPRESS_VENDOR_ID 0xa2c
41 #define CYPRESS_PRODUCT_ID 0x8
43 #define CYPRESS_READ_PORT 0x4
44 #define CYPRESS_WRITE_PORT 0x5
46 #define CYPRESS_READ_RAM 0x2
47 #define CYPRESS_WRITE_RAM 0x3
48 #define CYPRESS_READ_ROM 0x1
50 #define CYPRESS_READ_PORT_ID0 0
51 #define CYPRESS_WRITE_PORT_ID0 0
52 #define CYPRESS_READ_PORT_ID1 0x2
53 #define CYPRESS_WRITE_PORT_ID1 1
55 #define CYPRESS_MAX_REQSIZE 8
58 /* table of devices that work with this driver */
59 static struct usb_device_id cypress_table [] = {
60 { USB_DEVICE(CYPRESS_VENDOR_ID, CYPRESS_PRODUCT_ID) },
61 { }
63 MODULE_DEVICE_TABLE(usb, cypress_table);
65 /* structure to hold all of our device specific stuff */
66 struct cypress {
67 struct usb_device * udev;
68 unsigned char port[2];
71 /* used to send usb control messages to device */
72 static int vendor_command(struct cypress *dev, unsigned char request,
73 unsigned char address, unsigned char data)
75 int retval = 0;
76 unsigned int pipe;
77 unsigned char *iobuf;
79 /* allocate some memory for the i/o buffer*/
80 iobuf = kzalloc(CYPRESS_MAX_REQSIZE, GFP_KERNEL);
81 if (!iobuf) {
82 dev_err(&dev->udev->dev, "Out of memory!\n");
83 retval = -ENOMEM;
84 goto error;
87 dev_dbg(&dev->udev->dev, "Sending usb_control_msg (data: %d)\n", data);
89 /* prepare usb control message and send it upstream */
90 pipe = usb_rcvctrlpipe(dev->udev, 0);
91 retval = usb_control_msg(dev->udev, pipe, request,
92 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
93 address, data, iobuf, CYPRESS_MAX_REQSIZE,
94 USB_CTRL_GET_TIMEOUT);
96 /* store returned data (more READs to be added) */
97 switch (request) {
98 case CYPRESS_READ_PORT:
99 if (address == CYPRESS_READ_PORT_ID0) {
100 dev->port[0] = iobuf[1];
101 dev_dbg(&dev->udev->dev,
102 "READ_PORT0 returned: %d\n",
103 dev->port[0]);
105 else if (address == CYPRESS_READ_PORT_ID1) {
106 dev->port[1] = iobuf[1];
107 dev_dbg(&dev->udev->dev,
108 "READ_PORT1 returned: %d\n",
109 dev->port[1]);
111 break;
114 kfree(iobuf);
115 error:
116 return retval;
119 /* write port value */
120 static ssize_t write_port(struct device *dev, struct device_attribute *attr,
121 const char *buf, size_t count,
122 int port_num, int write_id)
124 int value = -1;
125 int result = 0;
127 struct usb_interface *intf = to_usb_interface(dev);
128 struct cypress *cyp = usb_get_intfdata(intf);
130 dev_dbg(&cyp->udev->dev, "WRITE_PORT%d called\n", port_num);
132 /* validate input data */
133 if (sscanf(buf, "%d", &value) < 1) {
134 result = -EINVAL;
135 goto error;
137 if (value < 0 || value > 255) {
138 result = -EINVAL;
139 goto error;
142 result = vendor_command(cyp, CYPRESS_WRITE_PORT, write_id,
143 (unsigned char)value);
145 dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
146 error:
147 return result < 0 ? result : count;
150 /* attribute callback handler (write) */
151 static ssize_t set_port0_handler(struct device *dev,
152 struct device_attribute *attr,
153 const char *buf, size_t count)
155 return write_port(dev, attr, buf, count, 0, CYPRESS_WRITE_PORT_ID0);
158 /* attribute callback handler (write) */
159 static ssize_t set_port1_handler(struct device *dev,
160 struct device_attribute *attr,
161 const char *buf, size_t count)
163 return write_port(dev, attr, buf, count, 1, CYPRESS_WRITE_PORT_ID1);
166 /* read port value */
167 static ssize_t read_port(struct device *dev, struct device_attribute *attr,
168 char *buf, int port_num, int read_id)
170 int result = 0;
172 struct usb_interface *intf = to_usb_interface(dev);
173 struct cypress *cyp = usb_get_intfdata(intf);
175 dev_dbg(&cyp->udev->dev, "READ_PORT%d called\n", port_num);
177 result = vendor_command(cyp, CYPRESS_READ_PORT, read_id, 0);
179 dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
181 return sprintf(buf, "%d", cyp->port[port_num]);
184 /* attribute callback handler (read) */
185 static ssize_t get_port0_handler(struct device *dev,
186 struct device_attribute *attr, char *buf)
188 return read_port(dev, attr, buf, 0, CYPRESS_READ_PORT_ID0);
191 /* attribute callback handler (read) */
192 static ssize_t get_port1_handler(struct device *dev,
193 struct device_attribute *attr, char *buf)
195 return read_port(dev, attr, buf, 1, CYPRESS_READ_PORT_ID1);
198 static DEVICE_ATTR(port0, S_IWUGO | S_IRUGO,
199 get_port0_handler, set_port0_handler);
201 static DEVICE_ATTR(port1, S_IWUGO | S_IRUGO,
202 get_port1_handler, set_port1_handler);
205 static int cypress_probe(struct usb_interface *interface,
206 const struct usb_device_id *id)
208 struct cypress *dev = NULL;
209 int retval = -ENOMEM;
211 /* allocate memory for our device state and initialize it */
212 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
213 if (dev == NULL) {
214 dev_err(&interface->dev, "Out of memory!\n");
215 goto error_mem;
218 dev->udev = usb_get_dev(interface_to_usbdev(interface));
220 /* save our data pointer in this interface device */
221 usb_set_intfdata(interface, dev);
223 /* create device attribute files */
224 retval = device_create_file(&interface->dev, &dev_attr_port0);
225 if (retval)
226 goto error;
227 retval = device_create_file(&interface->dev, &dev_attr_port1);
228 if (retval)
229 goto error;
231 /* let the user know that the device is now attached */
232 dev_info(&interface->dev,
233 "Cypress CY7C63xxx device now attached\n");
234 return 0;
236 error:
237 device_remove_file(&interface->dev, &dev_attr_port0);
238 device_remove_file(&interface->dev, &dev_attr_port1);
239 usb_set_intfdata(interface, NULL);
240 usb_put_dev(dev->udev);
241 kfree(dev);
243 error_mem:
244 return retval;
247 static void cypress_disconnect(struct usb_interface *interface)
249 struct cypress *dev;
251 dev = usb_get_intfdata(interface);
253 /* remove device attribute files */
254 device_remove_file(&interface->dev, &dev_attr_port0);
255 device_remove_file(&interface->dev, &dev_attr_port1);
256 /* the intfdata can be set to NULL only after the
257 * device files have been removed */
258 usb_set_intfdata(interface, NULL);
260 usb_put_dev(dev->udev);
262 dev_info(&interface->dev,
263 "Cypress CY7C63xxx device now disconnected\n");
265 kfree(dev);
268 static struct usb_driver cypress_driver = {
269 .name = "cypress_cy7c63",
270 .probe = cypress_probe,
271 .disconnect = cypress_disconnect,
272 .id_table = cypress_table,
275 static int __init cypress_init(void)
277 int result;
279 /* register this driver with the USB subsystem */
280 result = usb_register(&cypress_driver);
281 if (result) {
282 err("Function usb_register failed! Error number: %d\n", result);
285 return result;
288 static void __exit cypress_exit(void)
290 /* deregister this driver with the USB subsystem */
291 usb_deregister(&cypress_driver);
294 module_init(cypress_init);
295 module_exit(cypress_exit);
297 MODULE_AUTHOR(DRIVER_AUTHOR);
298 MODULE_DESCRIPTION(DRIVER_DESC);
300 MODULE_LICENSE("GPL");