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authorOliver Bock <o.bock@fh-wolfenbuettel.de>2006-06-22 13:04:47 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-07-12 19:03:21 -0400
commit9189bfc2df0fd87e0e537fe7ad4cf3b66a440fe4 (patch)
tree2ae07311531ff2ce51d9e93de7fc10953efae335 /drivers/usb/misc/cypress_cy7c63.c
parent58a5b0a6346b71bf01f0d49cfcc91d3225a373aa (diff)
[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>
Diffstat (limited to 'drivers/usb/misc/cypress_cy7c63.c')
-rw-r--r--drivers/usb/misc/cypress_cy7c63.c279
1 files changed, 279 insertions, 0 deletions
diff --git a/drivers/usb/misc/cypress_cy7c63.c b/drivers/usb/misc/cypress_cy7c63.c
new file mode 100644
index 000000000000..e091d327bd9e
--- /dev/null
+++ b/drivers/usb/misc/cypress_cy7c63.c
@@ -0,0 +1,279 @@
1/*
2* cypress_cy7c63.c
3*
4* Copyright (c) 2006 Oliver Bock (o.bock@fh-wolfenbuettel.de)
5*
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.
9*
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.
13*
14* Supported vendors: AK Modul-Bus Computer GmbH
15* Supported devices: CY7C63001A-PC (to be continued...)
16* Supported functions: Read/Write Ports (to be continued...)
17*
18*
19* This program is free software; you can redistribute it and/or
20* modify it under the terms of the GNU General Public License as
21* published by the Free Software Foundation, version 2.
22*/
23
24#include <linux/init.h>
25#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/usb.h>
28
29#define DRIVER_AUTHOR "Oliver Bock (o.bock@fh-wolfenbuettel.de)"
30#define DRIVER_DESC "Cypress CY7C63xxx USB driver"
31
32#define CYPRESS_VENDOR_ID 0xa2c
33#define CYPRESS_PRODUCT_ID 0x8
34
35#define CYPRESS_READ_PORT 0x4
36#define CYPRESS_WRITE_PORT 0x5
37
38#define CYPRESS_READ_RAM 0x2
39#define CYPRESS_WRITE_RAM 0x3
40#define CYPRESS_READ_ROM 0x1
41
42#define CYPRESS_READ_PORT_ID0 0
43#define CYPRESS_WRITE_PORT_ID0 0
44#define CYPRESS_READ_PORT_ID1 0x2
45#define CYPRESS_WRITE_PORT_ID1 1
46
47#define CYPRESS_MAX_REQSIZE 8
48
49
50/* table of devices that work with this driver */
51static struct usb_device_id cypress_table [] = {
52 { USB_DEVICE(CYPRESS_VENDOR_ID, CYPRESS_PRODUCT_ID) },
53 { }
54};
55MODULE_DEVICE_TABLE(usb, cypress_table);
56
57/* structure to hold all of our device specific stuff */
58struct cypress {
59 struct usb_device * udev;
60 unsigned char port[2];
61};
62
63/* used to send usb control messages to device */
64static int vendor_command(struct cypress *dev, unsigned char request,
65 unsigned char address, unsigned char data)
66{
67 int retval = 0;
68 unsigned int pipe;
69 unsigned char *iobuf;
70
71 /* allocate some memory for the i/o buffer*/
72 iobuf = kzalloc(CYPRESS_MAX_REQSIZE, GFP_KERNEL);
73 if (!iobuf) {
74 dev_err(&dev->udev->dev, "Out of memory!\n");
75 retval = -ENOMEM;
76 goto error;
77 }
78
79 dev_dbg(&dev->udev->dev, "Sending usb_control_msg (data: %d)\n", data);
80
81 /* prepare usb control message and send it upstream */
82 pipe = usb_rcvctrlpipe(dev->udev, 0);
83 retval = usb_control_msg(dev->udev, pipe, request,
84 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
85 address, data, iobuf, CYPRESS_MAX_REQSIZE,
86 USB_CTRL_GET_TIMEOUT);
87
88 /* store returned data (more READs to be added) */
89 switch (request) {
90 case CYPRESS_READ_PORT:
91 if (address == CYPRESS_READ_PORT_ID0) {
92 dev->port[0] = iobuf[1];
93 dev_dbg(&dev->udev->dev,
94 "READ_PORT0 returned: %d\n",
95 dev->port[0]);
96 }
97 else if (address == CYPRESS_READ_PORT_ID1) {
98 dev->port[1] = iobuf[1];
99 dev_dbg(&dev->udev->dev,
100 "READ_PORT1 returned: %d\n",
101 dev->port[1]);
102 }
103 break;
104 }
105
106 kfree(iobuf);
107error:
108 return retval;
109}
110
111/* write port value */
112static ssize_t write_port(struct device *dev, struct device_attribute *attr,
113 const char *buf, size_t count,
114 int port_num, int write_id)
115{
116 int value = -1;
117 int result = 0;
118
119 struct usb_interface *intf = to_usb_interface(dev);
120 struct cypress *cyp = usb_get_intfdata(intf);
121
122 dev_dbg(&cyp->udev->dev, "WRITE_PORT%d called\n", port_num);
123
124 /* validate input data */
125 if (sscanf(buf, "%d", &value) < 1) {
126 result = -EINVAL;
127 goto error;
128 }
129 if (value < 0 || value > 255) {
130 result = -EINVAL;
131 goto error;
132 }
133
134 result = vendor_command(cyp, CYPRESS_WRITE_PORT, write_id,
135 (unsigned char)value);
136
137 dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
138error:
139 return result < 0 ? result : count;
140}
141
142/* attribute callback handler (write) */
143static ssize_t set_port0_handler(struct device *dev,
144 struct device_attribute *attr,
145 const char *buf, size_t count)
146{
147 return write_port(dev, attr, buf, count, 0, CYPRESS_WRITE_PORT_ID0);
148}
149
150/* attribute callback handler (write) */
151static ssize_t set_port1_handler(struct device *dev,
152 struct device_attribute *attr,
153 const char *buf, size_t count)
154{
155 return write_port(dev, attr, buf, count, 1, CYPRESS_WRITE_PORT_ID1);
156}
157
158/* read port value */
159static ssize_t read_port(struct device *dev, struct device_attribute *attr,
160 char *buf, int port_num, int read_id)
161{
162 int result = 0;
163
164 struct usb_interface *intf = to_usb_interface(dev);
165 struct cypress *cyp = usb_get_intfdata(intf);
166
167 dev_dbg(&cyp->udev->dev, "READ_PORT%d called\n", port_num);
168
169 result = vendor_command(cyp, CYPRESS_READ_PORT, read_id, 0);
170
171 dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
172
173 return sprintf(buf, "%d", cyp->port[port_num]);
174}
175
176/* attribute callback handler (read) */
177static ssize_t get_port0_handler(struct device *dev,
178 struct device_attribute *attr, char *buf)
179{
180 return read_port(dev, attr, buf, 0, CYPRESS_READ_PORT_ID0);
181}
182
183/* attribute callback handler (read) */
184static ssize_t get_port1_handler(struct device *dev,
185 struct device_attribute *attr, char *buf)
186{
187 return read_port(dev, attr, buf, 1, CYPRESS_READ_PORT_ID1);
188}
189
190static DEVICE_ATTR(port0, S_IWUGO | S_IRUGO,
191 get_port0_handler, set_port0_handler);
192
193static DEVICE_ATTR(port1, S_IWUGO | S_IRUGO,
194 get_port1_handler, set_port1_handler);
195
196
197static int cypress_probe(struct usb_interface *interface,
198 const struct usb_device_id *id)
199{
200 struct cypress *dev = NULL;
201 int retval = -ENOMEM;
202
203 /* allocate memory for our device state and initialize it */
204 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
205 if (dev == NULL) {
206 dev_err(&dev->udev->dev, "Out of memory!\n");
207 goto error;
208 }
209
210 dev->udev = usb_get_dev(interface_to_usbdev(interface));
211
212 /* save our data pointer in this interface device */
213 usb_set_intfdata(interface, dev);
214
215 /* create device attribute files */
216 device_create_file(&interface->dev, &dev_attr_port0);
217 device_create_file(&interface->dev, &dev_attr_port1);
218
219 /* let the user know that the device is now attached */
220 dev_info(&interface->dev,
221 "Cypress CY7C63xxx device now attached\n");
222
223 retval = 0;
224error:
225 return retval;
226}
227
228static void cypress_disconnect(struct usb_interface *interface)
229{
230 struct cypress *dev;
231
232 dev = usb_get_intfdata(interface);
233 usb_set_intfdata(interface, NULL);
234
235 /* remove device attribute files */
236 device_remove_file(&interface->dev, &dev_attr_port0);
237 device_remove_file(&interface->dev, &dev_attr_port1);
238
239 usb_put_dev(dev->udev);
240
241 dev_info(&interface->dev,
242 "Cypress CY7C63xxx device now disconnected\n");
243
244 kfree(dev);
245}
246
247static struct usb_driver cypress_driver = {
248 .name = "cypress_cy7c63",
249 .probe = cypress_probe,
250 .disconnect = cypress_disconnect,
251 .id_table = cypress_table,
252};
253
254static int __init cypress_init(void)
255{
256 int result;
257
258 /* register this driver with the USB subsystem */
259 result = usb_register(&cypress_driver);
260 if (result) {
261 err("Function usb_register failed! Error number: %d\n", result);
262 }
263
264 return result;
265}
266
267static void __exit cypress_exit(void)
268{
269 /* deregister this driver with the USB subsystem */
270 usb_deregister(&cypress_driver);
271}
272
273module_init(cypress_init);
274module_exit(cypress_exit);
275
276MODULE_AUTHOR(DRIVER_AUTHOR);
277MODULE_DESCRIPTION(DRIVER_DESC);
278
279MODULE_LICENSE("GPL");