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1/*
2* cypress_cy7c63.c
3*
4* Copyright (c) 2006-2007 Oliver Bock (bock@tfh-berlin.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* (Firmware "Port-Chip")
16*
17* Supported devices: CY7C63001A-PC
18* CY7C63001C-PXC
19* CY7C63001C-SXC
20*
21* Supported functions: Read/Write Ports
22*
23*
24* For up-to-date information please visit:
25* http://www.obock.de/kernel/cypress
26*
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.
30*/
31
32#include <linux/module.h>
33#include <linux/kernel.h>
34#include <linux/slab.h>
35#include <linux/usb.h>
36
37#define DRIVER_AUTHOR "Oliver Bock (bock@tfh-berlin.de)"
38#define DRIVER_DESC "Cypress CY7C63xxx USB driver"
39
40#define CYPRESS_VENDOR_ID 0xa2c
41#define CYPRESS_PRODUCT_ID 0x8
42
43#define CYPRESS_READ_PORT 0x4
44#define CYPRESS_WRITE_PORT 0x5
45
46#define CYPRESS_READ_RAM 0x2
47#define CYPRESS_WRITE_RAM 0x3
48#define CYPRESS_READ_ROM 0x1
49
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
54
55#define CYPRESS_MAX_REQSIZE 8
56
57
58/* table of devices that work with this driver */
59static const struct usb_device_id cypress_table[] = {
60 { USB_DEVICE(CYPRESS_VENDOR_ID, CYPRESS_PRODUCT_ID) },
61 { }
62};
63MODULE_DEVICE_TABLE(usb, cypress_table);
64
65/* structure to hold all of our device specific stuff */
66struct cypress {
67 struct usb_device * udev;
68 unsigned char port[2];
69};
70
71/* used to send usb control messages to device */
72static int vendor_command(struct cypress *dev, unsigned char request,
73 unsigned char address, unsigned char data)
74{
75 int retval = 0;
76 unsigned int pipe;
77 unsigned char *iobuf;
78
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;
85 }
86
87 dev_dbg(&dev->udev->dev, "Sending usb_control_msg (data: %d)\n", data);
88
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);
95
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]);
104 }
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]);
110 }
111 break;
112 }
113
114 kfree(iobuf);
115error:
116 return retval;
117}
118
119/* write port value */
120static 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)
123{
124 int value = -1;
125 int result = 0;
126
127 struct usb_interface *intf = to_usb_interface(dev);
128 struct cypress *cyp = usb_get_intfdata(intf);
129
130 dev_dbg(&cyp->udev->dev, "WRITE_PORT%d called\n", port_num);
131
132 /* validate input data */
133 if (sscanf(buf, "%d", &value) < 1) {
134 result = -EINVAL;
135 goto error;
136 }
137 if (value < 0 || value > 255) {
138 result = -EINVAL;
139 goto error;
140 }
141
142 result = vendor_command(cyp, CYPRESS_WRITE_PORT, write_id,
143 (unsigned char)value);
144
145 dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
146error:
147 return result < 0 ? result : count;
148}
149
150/* attribute callback handler (write) */
151static ssize_t set_port0_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, 0, CYPRESS_WRITE_PORT_ID0);
156}
157
158/* attribute callback handler (write) */
159static ssize_t set_port1_handler(struct device *dev,
160 struct device_attribute *attr,
161 const char *buf, size_t count)
162{
163 return write_port(dev, attr, buf, count, 1, CYPRESS_WRITE_PORT_ID1);
164}
165
166/* read port value */
167static ssize_t read_port(struct device *dev, struct device_attribute *attr,
168 char *buf, int port_num, int read_id)
169{
170 int result = 0;
171
172 struct usb_interface *intf = to_usb_interface(dev);
173 struct cypress *cyp = usb_get_intfdata(intf);
174
175 dev_dbg(&cyp->udev->dev, "READ_PORT%d called\n", port_num);
176
177 result = vendor_command(cyp, CYPRESS_READ_PORT, read_id, 0);
178
179 dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
180
181 return sprintf(buf, "%d", cyp->port[port_num]);
182}
183
184/* attribute callback handler (read) */
185static ssize_t get_port0_handler(struct device *dev,
186 struct device_attribute *attr, char *buf)
187{
188 return read_port(dev, attr, buf, 0, CYPRESS_READ_PORT_ID0);
189}
190
191/* attribute callback handler (read) */
192static ssize_t get_port1_handler(struct device *dev,
193 struct device_attribute *attr, char *buf)
194{
195 return read_port(dev, attr, buf, 1, CYPRESS_READ_PORT_ID1);
196}
197
198static DEVICE_ATTR(port0, S_IRUGO | S_IWUSR, get_port0_handler, set_port0_handler);
199
200static DEVICE_ATTR(port1, S_IRUGO | S_IWUSR, get_port1_handler, set_port1_handler);
201
202
203static int cypress_probe(struct usb_interface *interface,
204 const struct usb_device_id *id)
205{
206 struct cypress *dev = NULL;
207 int retval = -ENOMEM;
208
209 /* allocate memory for our device state and initialize it */
210 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
211 if (dev == NULL) {
212 dev_err(&interface->dev, "Out of memory!\n");
213 goto error_mem;
214 }
215
216 dev->udev = usb_get_dev(interface_to_usbdev(interface));
217
218 /* save our data pointer in this interface device */
219 usb_set_intfdata(interface, dev);
220
221 /* create device attribute files */
222 retval = device_create_file(&interface->dev, &dev_attr_port0);
223 if (retval)
224 goto error;
225 retval = device_create_file(&interface->dev, &dev_attr_port1);
226 if (retval)
227 goto error;
228
229 /* let the user know that the device is now attached */
230 dev_info(&interface->dev,
231 "Cypress CY7C63xxx device now attached\n");
232 return 0;
233
234error:
235 device_remove_file(&interface->dev, &dev_attr_port0);
236 device_remove_file(&interface->dev, &dev_attr_port1);
237 usb_set_intfdata(interface, NULL);
238 usb_put_dev(dev->udev);
239 kfree(dev);
240
241error_mem:
242 return retval;
243}
244
245static void cypress_disconnect(struct usb_interface *interface)
246{
247 struct cypress *dev;
248
249 dev = usb_get_intfdata(interface);
250
251 /* remove device attribute files */
252 device_remove_file(&interface->dev, &dev_attr_port0);
253 device_remove_file(&interface->dev, &dev_attr_port1);
254 /* the intfdata can be set to NULL only after the
255 * device files have been removed */
256 usb_set_intfdata(interface, NULL);
257
258 usb_put_dev(dev->udev);
259
260 dev_info(&interface->dev,
261 "Cypress CY7C63xxx device now disconnected\n");
262
263 kfree(dev);
264}
265
266static struct usb_driver cypress_driver = {
267 .name = "cypress_cy7c63",
268 .probe = cypress_probe,
269 .disconnect = cypress_disconnect,
270 .id_table = cypress_table,
271};
272
273module_usb_driver(cypress_driver);
274
275MODULE_AUTHOR(DRIVER_AUTHOR);
276MODULE_DESCRIPTION(DRIVER_DESC);
277
278MODULE_LICENSE("GPL");
1/*
2* cypress_cy7c63.c
3*
4* Copyright (c) 2006-2007 Oliver Bock (bock@tfh-berlin.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* (Firmware "Port-Chip")
16*
17* Supported devices: CY7C63001A-PC
18* CY7C63001C-PXC
19* CY7C63001C-SXC
20*
21* Supported functions: Read/Write Ports
22*
23*
24* For up-to-date information please visit:
25* http://www.obock.de/kernel/cypress
26*
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.
30*/
31
32#include <linux/module.h>
33#include <linux/kernel.h>
34#include <linux/slab.h>
35#include <linux/usb.h>
36
37#define DRIVER_AUTHOR "Oliver Bock (bock@tfh-berlin.de)"
38#define DRIVER_DESC "Cypress CY7C63xxx USB driver"
39
40#define CYPRESS_VENDOR_ID 0xa2c
41#define CYPRESS_PRODUCT_ID 0x8
42
43#define CYPRESS_READ_PORT 0x4
44#define CYPRESS_WRITE_PORT 0x5
45
46#define CYPRESS_READ_RAM 0x2
47#define CYPRESS_WRITE_RAM 0x3
48#define CYPRESS_READ_ROM 0x1
49
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
54
55#define CYPRESS_MAX_REQSIZE 8
56
57
58/* table of devices that work with this driver */
59static const struct usb_device_id cypress_table[] = {
60 { USB_DEVICE(CYPRESS_VENDOR_ID, CYPRESS_PRODUCT_ID) },
61 { }
62};
63MODULE_DEVICE_TABLE(usb, cypress_table);
64
65/* structure to hold all of our device specific stuff */
66struct cypress {
67 struct usb_device * udev;
68 unsigned char port[2];
69};
70
71/* used to send usb control messages to device */
72static int vendor_command(struct cypress *dev, unsigned char request,
73 unsigned char address, unsigned char data)
74{
75 int retval = 0;
76 unsigned int pipe;
77 unsigned char *iobuf;
78
79 /* allocate some memory for the i/o buffer*/
80 iobuf = kzalloc(CYPRESS_MAX_REQSIZE, GFP_KERNEL);
81 if (!iobuf) {
82 retval = -ENOMEM;
83 goto error;
84 }
85
86 dev_dbg(&dev->udev->dev, "Sending usb_control_msg (data: %d)\n", data);
87
88 /* prepare usb control message and send it upstream */
89 pipe = usb_rcvctrlpipe(dev->udev, 0);
90 retval = usb_control_msg(dev->udev, pipe, request,
91 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
92 address, data, iobuf, CYPRESS_MAX_REQSIZE,
93 USB_CTRL_GET_TIMEOUT);
94
95 /* store returned data (more READs to be added) */
96 switch (request) {
97 case CYPRESS_READ_PORT:
98 if (address == CYPRESS_READ_PORT_ID0) {
99 dev->port[0] = iobuf[1];
100 dev_dbg(&dev->udev->dev,
101 "READ_PORT0 returned: %d\n",
102 dev->port[0]);
103 }
104 else if (address == CYPRESS_READ_PORT_ID1) {
105 dev->port[1] = iobuf[1];
106 dev_dbg(&dev->udev->dev,
107 "READ_PORT1 returned: %d\n",
108 dev->port[1]);
109 }
110 break;
111 }
112
113 kfree(iobuf);
114error:
115 return retval;
116}
117
118/* write port value */
119static ssize_t write_port(struct device *dev, struct device_attribute *attr,
120 const char *buf, size_t count,
121 int port_num, int write_id)
122{
123 int value = -1;
124 int result = 0;
125
126 struct usb_interface *intf = to_usb_interface(dev);
127 struct cypress *cyp = usb_get_intfdata(intf);
128
129 dev_dbg(&cyp->udev->dev, "WRITE_PORT%d called\n", port_num);
130
131 /* validate input data */
132 if (sscanf(buf, "%d", &value) < 1) {
133 result = -EINVAL;
134 goto error;
135 }
136 if (value < 0 || value > 255) {
137 result = -EINVAL;
138 goto error;
139 }
140
141 result = vendor_command(cyp, CYPRESS_WRITE_PORT, write_id,
142 (unsigned char)value);
143
144 dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
145error:
146 return result < 0 ? result : count;
147}
148
149/* attribute callback handler (write) */
150static ssize_t set_port0_handler(struct device *dev,
151 struct device_attribute *attr,
152 const char *buf, size_t count)
153{
154 return write_port(dev, attr, buf, count, 0, CYPRESS_WRITE_PORT_ID0);
155}
156
157/* attribute callback handler (write) */
158static ssize_t set_port1_handler(struct device *dev,
159 struct device_attribute *attr,
160 const char *buf, size_t count)
161{
162 return write_port(dev, attr, buf, count, 1, CYPRESS_WRITE_PORT_ID1);
163}
164
165/* read port value */
166static ssize_t read_port(struct device *dev, struct device_attribute *attr,
167 char *buf, int port_num, int read_id)
168{
169 int result = 0;
170
171 struct usb_interface *intf = to_usb_interface(dev);
172 struct cypress *cyp = usb_get_intfdata(intf);
173
174 dev_dbg(&cyp->udev->dev, "READ_PORT%d called\n", port_num);
175
176 result = vendor_command(cyp, CYPRESS_READ_PORT, read_id, 0);
177
178 dev_dbg(&cyp->udev->dev, "Result of vendor_command: %d\n\n", result);
179
180 return sprintf(buf, "%d", cyp->port[port_num]);
181}
182
183/* attribute callback handler (read) */
184static ssize_t get_port0_handler(struct device *dev,
185 struct device_attribute *attr, char *buf)
186{
187 return read_port(dev, attr, buf, 0, CYPRESS_READ_PORT_ID0);
188}
189
190/* attribute callback handler (read) */
191static ssize_t get_port1_handler(struct device *dev,
192 struct device_attribute *attr, char *buf)
193{
194 return read_port(dev, attr, buf, 1, CYPRESS_READ_PORT_ID1);
195}
196
197static DEVICE_ATTR(port0, S_IRUGO | S_IWUSR, get_port0_handler, set_port0_handler);
198
199static DEVICE_ATTR(port1, S_IRUGO | S_IWUSR, get_port1_handler, set_port1_handler);
200
201
202static int cypress_probe(struct usb_interface *interface,
203 const struct usb_device_id *id)
204{
205 struct cypress *dev = NULL;
206 int retval = -ENOMEM;
207
208 /* allocate memory for our device state and initialize it */
209 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
210 if (!dev)
211 goto error_mem;
212
213 dev->udev = usb_get_dev(interface_to_usbdev(interface));
214
215 /* save our data pointer in this interface device */
216 usb_set_intfdata(interface, dev);
217
218 /* create device attribute files */
219 retval = device_create_file(&interface->dev, &dev_attr_port0);
220 if (retval)
221 goto error;
222 retval = device_create_file(&interface->dev, &dev_attr_port1);
223 if (retval)
224 goto error;
225
226 /* let the user know that the device is now attached */
227 dev_info(&interface->dev,
228 "Cypress CY7C63xxx device now attached\n");
229 return 0;
230
231error:
232 device_remove_file(&interface->dev, &dev_attr_port0);
233 device_remove_file(&interface->dev, &dev_attr_port1);
234 usb_set_intfdata(interface, NULL);
235 usb_put_dev(dev->udev);
236 kfree(dev);
237
238error_mem:
239 return retval;
240}
241
242static void cypress_disconnect(struct usb_interface *interface)
243{
244 struct cypress *dev;
245
246 dev = usb_get_intfdata(interface);
247
248 /* remove device attribute files */
249 device_remove_file(&interface->dev, &dev_attr_port0);
250 device_remove_file(&interface->dev, &dev_attr_port1);
251 /* the intfdata can be set to NULL only after the
252 * device files have been removed */
253 usb_set_intfdata(interface, NULL);
254
255 usb_put_dev(dev->udev);
256
257 dev_info(&interface->dev,
258 "Cypress CY7C63xxx device now disconnected\n");
259
260 kfree(dev);
261}
262
263static struct usb_driver cypress_driver = {
264 .name = "cypress_cy7c63",
265 .probe = cypress_probe,
266 .disconnect = cypress_disconnect,
267 .id_table = cypress_table,
268};
269
270module_usb_driver(cypress_driver);
271
272MODULE_AUTHOR(DRIVER_AUTHOR);
273MODULE_DESCRIPTION(DRIVER_DESC);
274
275MODULE_LICENSE("GPL");