USB: Added driver for a Delcom USB 7-segment LED Display
Added basic support for a Delcom USB 7-segment LED Display Signed-off by: Harrison Metzger <harrisonmetz@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Harrison Metzger
Greg Kroah-Hartman
parent
c3d36c453c
commit
eb86be5424
|
|
@ -0,0 +1,43 @@
|
|||
Where: /sys/bus/usb/.../powered
|
||||
Date: August 2008
|
||||
Kernel Version: 2.6.26
|
||||
Contact: Harrison Metzger <harrisonmetz@gmail.com>
|
||||
Description: Controls whether the device's display will powered.
|
||||
A value of 0 is off and a non-zero value is on.
|
||||
|
||||
Where: /sys/bus/usb/.../mode_msb
|
||||
Where: /sys/bus/usb/.../mode_lsb
|
||||
Date: August 2008
|
||||
Kernel Version: 2.6.26
|
||||
Contact: Harrison Metzger <harrisonmetz@gmail.com>
|
||||
Description: Controls the devices display mode.
|
||||
For a 6 character display the values are
|
||||
MSB 0x06; LSB 0x3F, and
|
||||
for an 8 character display the values are
|
||||
MSB 0x08; LSB 0xFF.
|
||||
|
||||
Where: /sys/bus/usb/.../textmode
|
||||
Date: August 2008
|
||||
Kernel Version: 2.6.26
|
||||
Contact: Harrison Metzger <harrisonmetz@gmail.com>
|
||||
Description: Controls the way the device interprets its text buffer.
|
||||
raw: each character controls its segment manually
|
||||
hex: each character is between 0-15
|
||||
ascii: each character is between '0'-'9' and 'A'-'F'.
|
||||
|
||||
Where: /sys/bus/usb/.../text
|
||||
Date: August 2008
|
||||
Kernel Version: 2.6.26
|
||||
Contact: Harrison Metzger <harrisonmetz@gmail.com>
|
||||
Description: The text (or data) for the device to display
|
||||
|
||||
Where: /sys/bus/usb/.../decimals
|
||||
Date: August 2008
|
||||
Kernel Version: 2.6.26
|
||||
Contact: Harrison Metzger <harrisonmetz@gmail.com>
|
||||
Description: Controls the decimal places on the device.
|
||||
To set the nth decimal place, give this field
|
||||
the value of 10 ** n. Assume this field has
|
||||
the value k and has 1 or more decimal places set,
|
||||
to set the mth place (where m is not already set),
|
||||
change this fields value to k + 10 ** m.
|
||||
|
|
@ -0,0 +1,46 @@
|
|||
USB 7-Segment Numeric Display
|
||||
Manufactured by Delcom Engineering
|
||||
|
||||
Device Information
|
||||
------------------
|
||||
USB VENDOR_ID 0x0fc5
|
||||
USB PRODUCT_ID 0x1227
|
||||
Both the 6 character and 8 character displays have PRODUCT_ID,
|
||||
and according to Delcom Engineering no queryable information
|
||||
can be obtained from the device to tell them apart.
|
||||
|
||||
Device Modes
|
||||
------------
|
||||
By default, the driver assumes the display is only 6 characters
|
||||
The mode for 6 characters is:
|
||||
MSB 0x06; LSB 0x3f
|
||||
For the 8 character display:
|
||||
MSB 0x08; LSB 0xff
|
||||
The device can accept "text" either in raw, hex, or ascii textmode.
|
||||
raw controls each segment manually,
|
||||
hex expects a value between 0-15 per character,
|
||||
ascii expects a value between '0'-'9' and 'A'-'F'.
|
||||
The default is ascii.
|
||||
|
||||
Device Operation
|
||||
----------------
|
||||
1. Turn on the device:
|
||||
echo 1 > /sys/bus/usb/.../powered
|
||||
2. Set the device's mode:
|
||||
echo $mode_msb > /sys/bus/usb/.../mode_msb
|
||||
echo $mode_lsb > /sys/bus/usb/.../mode_lsb
|
||||
3. Set the textmode:
|
||||
echo $textmode > /sys/bus/usb/.../textmode
|
||||
4. set the text (for example):
|
||||
echo "123ABC" > /sys/bus/usb/.../text (ascii)
|
||||
echo "A1B2" > /sys/bus/usb/.../text (ascii)
|
||||
echo -ne "\x01\x02\x03" > /sys/bus/usb/.../text (hex)
|
||||
5. Set the decimal places.
|
||||
The device has either 6 or 8 decimal points.
|
||||
to set the nth decimal place calculate 10 ** n
|
||||
and echo it in to /sys/bus/usb/.../decimals
|
||||
To set multiple decimals points sum up each power.
|
||||
For example, to set the 0th and 3rd decimal place
|
||||
echo 1001 > /sys/bus/usb/.../decimals
|
||||
|
||||
|
||||
|
|
@ -42,6 +42,15 @@ config USB_ADUTUX
|
|||
To compile this driver as a module, choose M here. The module
|
||||
will be called adutux.
|
||||
|
||||
config USB_SEVSEG
|
||||
tristate "USB 7-Segment LED Display"
|
||||
depends on USB
|
||||
help
|
||||
Say Y here if you have a USB 7-Segment Display by Delcom
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called usbsevseg.
|
||||
|
||||
config USB_RIO500
|
||||
tristate "USB Diamond Rio500 support"
|
||||
depends on USB
|
||||
|
|
|
|||
|
|
@ -26,6 +26,7 @@ obj-$(CONFIG_USB_RIO500) += rio500.o
|
|||
obj-$(CONFIG_USB_TEST) += usbtest.o
|
||||
obj-$(CONFIG_USB_TRANCEVIBRATOR) += trancevibrator.o
|
||||
obj-$(CONFIG_USB_USS720) += uss720.o
|
||||
obj-$(CONFIG_USB_SEVSEG) += usbsevseg.o
|
||||
|
||||
obj-$(CONFIG_USB_SISUSBVGA) += sisusbvga/
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,394 @@
|
|||
/*
|
||||
* USB 7 Segment Driver
|
||||
*
|
||||
* Copyright (C) 2008 Harrison Metzger <harrisonmetz@gmail.com>
|
||||
* Based on usbled.c by Greg Kroah-Hartman (greg@kroah.com)
|
||||
*
|
||||
* 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, version 2.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/usb.h>
|
||||
|
||||
|
||||
#define DRIVER_AUTHOR "Harrison Metzger <harrisonmetz@gmail.com>"
|
||||
#define DRIVER_DESC "USB 7 Segment Driver"
|
||||
|
||||
#define VENDOR_ID 0x0fc5
|
||||
#define PRODUCT_ID 0x1227
|
||||
#define MAXLEN 6
|
||||
|
||||
/* table of devices that work with this driver */
|
||||
static struct usb_device_id id_table[] = {
|
||||
{ USB_DEVICE(VENDOR_ID, PRODUCT_ID) },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(usb, id_table);
|
||||
|
||||
/* the different text display modes the device is capable of */
|
||||
static char *display_textmodes[] = {"raw", "hex", "ascii", NULL};
|
||||
|
||||
struct usb_sevsegdev {
|
||||
struct usb_device *udev;
|
||||
|
||||
u8 powered;
|
||||
u8 mode_msb;
|
||||
u8 mode_lsb;
|
||||
u8 decimals[MAXLEN];
|
||||
u8 textmode;
|
||||
u8 text[MAXLEN];
|
||||
u16 textlength;
|
||||
};
|
||||
|
||||
/* sysfs_streq can't replace this completely
|
||||
* If the device was in hex mode, and the user wanted a 0,
|
||||
* if str commands are used, we would assume the end of string
|
||||
* so mem commands are used.
|
||||
*/
|
||||
inline size_t my_memlen(const char *buf, size_t count)
|
||||
{
|
||||
if (count > 0 && buf[count-1] == '\n')
|
||||
return count - 1;
|
||||
else
|
||||
return count;
|
||||
}
|
||||
|
||||
static void update_display_powered(struct usb_sevsegdev *mydev)
|
||||
{
|
||||
int rc;
|
||||
|
||||
rc = usb_control_msg(mydev->udev,
|
||||
usb_sndctrlpipe(mydev->udev, 0),
|
||||
0x12,
|
||||
0x48,
|
||||
(80 * 0x100) + 10, /* (power mode) */
|
||||
(0x00 * 0x100) + (mydev->powered ? 1 : 0),
|
||||
NULL,
|
||||
0,
|
||||
2000);
|
||||
if (rc < 0)
|
||||
dev_dbg(&mydev->udev->dev, "power retval = %d\n", rc);
|
||||
}
|
||||
|
||||
static void update_display_mode(struct usb_sevsegdev *mydev)
|
||||
{
|
||||
int rc;
|
||||
|
||||
rc = usb_control_msg(mydev->udev,
|
||||
usb_sndctrlpipe(mydev->udev, 0),
|
||||
0x12,
|
||||
0x48,
|
||||
(82 * 0x100) + 10, /* (set mode) */
|
||||
(mydev->mode_msb * 0x100) + mydev->mode_lsb,
|
||||
NULL,
|
||||
0,
|
||||
2000);
|
||||
|
||||
if (rc < 0)
|
||||
dev_dbg(&mydev->udev->dev, "mode retval = %d\n", rc);
|
||||
}
|
||||
|
||||
static void update_display_visual(struct usb_sevsegdev *mydev)
|
||||
{
|
||||
int rc;
|
||||
int i;
|
||||
unsigned char *buffer;
|
||||
u8 decimals = 0;
|
||||
|
||||
buffer = kzalloc(MAXLEN, GFP_KERNEL);
|
||||
if (!buffer) {
|
||||
dev_err(&mydev->udev->dev, "out of memory\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* The device is right to left, where as you write left to right */
|
||||
for (i = 0; i < mydev->textlength; i++)
|
||||
buffer[i] = mydev->text[mydev->textlength-1-i];
|
||||
|
||||
rc = usb_control_msg(mydev->udev,
|
||||
usb_sndctrlpipe(mydev->udev, 0),
|
||||
0x12,
|
||||
0x48,
|
||||
(85 * 0x100) + 10, /* (write text) */
|
||||
(0 * 0x100) + mydev->textmode, /* mode */
|
||||
buffer,
|
||||
mydev->textlength,
|
||||
2000);
|
||||
|
||||
if (rc < 0)
|
||||
dev_dbg(&mydev->udev->dev, "write retval = %d\n", rc);
|
||||
|
||||
kfree(buffer);
|
||||
|
||||
/* The device is right to left, where as you write left to right */
|
||||
for (i = 0; i < sizeof(mydev->decimals); i++)
|
||||
decimals |= mydev->decimals[i] << i;
|
||||
|
||||
rc = usb_control_msg(mydev->udev,
|
||||
usb_sndctrlpipe(mydev->udev, 0),
|
||||
0x12,
|
||||
0x48,
|
||||
(86 * 0x100) + 10, /* (set decimal) */
|
||||
(0 * 0x100) + decimals, /* decimals */
|
||||
NULL,
|
||||
0,
|
||||
2000);
|
||||
|
||||
if (rc < 0)
|
||||
dev_dbg(&mydev->udev->dev, "decimal retval = %d\n", rc);
|
||||
}
|
||||
|
||||
#define MYDEV_ATTR_SIMPLE_UNSIGNED(name, update_fcn) \
|
||||
static ssize_t show_attr_##name(struct device *dev, \
|
||||
struct device_attribute *attr, char *buf) \
|
||||
{ \
|
||||
struct usb_interface *intf = to_usb_interface(dev); \
|
||||
struct usb_sevsegdev *mydev = usb_get_intfdata(intf); \
|
||||
\
|
||||
return sprintf(buf, "%u\n", mydev->name); \
|
||||
} \
|
||||
\
|
||||
static ssize_t set_attr_##name(struct device *dev, \
|
||||
struct device_attribute *attr, const char *buf, size_t count) \
|
||||
{ \
|
||||
struct usb_interface *intf = to_usb_interface(dev); \
|
||||
struct usb_sevsegdev *mydev = usb_get_intfdata(intf); \
|
||||
\
|
||||
mydev->name = simple_strtoul(buf, NULL, 10); \
|
||||
update_fcn(mydev); \
|
||||
\
|
||||
return count; \
|
||||
} \
|
||||
static DEVICE_ATTR(name, S_IWUGO | S_IRUGO, show_attr_##name, set_attr_##name);
|
||||
|
||||
static ssize_t show_attr_text(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct usb_interface *intf = to_usb_interface(dev);
|
||||
struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
|
||||
|
||||
return snprintf(buf, mydev->textlength, "%s\n", mydev->text);
|
||||
}
|
||||
|
||||
static ssize_t set_attr_text(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
struct usb_interface *intf = to_usb_interface(dev);
|
||||
struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
|
||||
size_t end = my_memlen(buf, count);
|
||||
|
||||
if (end > sizeof(mydev->text))
|
||||
return -EINVAL;
|
||||
|
||||
memset(mydev->text, 0, sizeof(mydev->text));
|
||||
mydev->textlength = end;
|
||||
|
||||
if (end > 0)
|
||||
memcpy(mydev->text, buf, end);
|
||||
|
||||
update_display_visual(mydev);
|
||||
return count;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(text, S_IWUGO | S_IRUGO, show_attr_text, set_attr_text);
|
||||
|
||||
static ssize_t show_attr_decimals(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct usb_interface *intf = to_usb_interface(dev);
|
||||
struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
|
||||
int i;
|
||||
int pos;
|
||||
|
||||
for (i = 0; i < sizeof(mydev->decimals); i++) {
|
||||
pos = sizeof(mydev->decimals) - 1 - i;
|
||||
if (mydev->decimals[i] == 0)
|
||||
buf[pos] = '0';
|
||||
else if (mydev->decimals[i] == 1)
|
||||
buf[pos] = '1';
|
||||
else
|
||||
buf[pos] = 'x';
|
||||
}
|
||||
|
||||
buf[sizeof(mydev->decimals)] = '\n';
|
||||
return sizeof(mydev->decimals) + 1;
|
||||
}
|
||||
|
||||
static ssize_t set_attr_decimals(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
struct usb_interface *intf = to_usb_interface(dev);
|
||||
struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
|
||||
size_t end = my_memlen(buf, count);
|
||||
int i;
|
||||
|
||||
if (end > sizeof(mydev->decimals))
|
||||
return -EINVAL;
|
||||
|
||||
for (i = 0; i < end; i++)
|
||||
if (buf[i] != '0' && buf[i] != '1')
|
||||
return -EINVAL;
|
||||
|
||||
memset(mydev->decimals, 0, sizeof(mydev->decimals));
|
||||
for (i = 0; i < end; i++)
|
||||
if (buf[i] == '1')
|
||||
mydev->decimals[end-1-i] = 1;
|
||||
|
||||
update_display_visual(mydev);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(decimals, S_IWUGO | S_IRUGO,
|
||||
show_attr_decimals, set_attr_decimals);
|
||||
|
||||
static ssize_t show_attr_textmode(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct usb_interface *intf = to_usb_interface(dev);
|
||||
struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
|
||||
int i;
|
||||
|
||||
buf[0] = 0;
|
||||
|
||||
for (i = 0; display_textmodes[i]; i++) {
|
||||
if (mydev->textmode == i) {
|
||||
strcat(buf, " [");
|
||||
strcat(buf, display_textmodes[i]);
|
||||
strcat(buf, "] ");
|
||||
} else {
|
||||
strcat(buf, " ");
|
||||
strcat(buf, display_textmodes[i]);
|
||||
strcat(buf, " ");
|
||||
}
|
||||
}
|
||||
strcat(buf, "\n");
|
||||
|
||||
|
||||
return strlen(buf);
|
||||
}
|
||||
|
||||
static ssize_t set_attr_textmode(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
struct usb_interface *intf = to_usb_interface(dev);
|
||||
struct usb_sevsegdev *mydev = usb_get_intfdata(intf);
|
||||
int i;
|
||||
|
||||
for (i = 0; display_textmodes[i]; i++) {
|
||||
if (sysfs_streq(display_textmodes[i], buf)) {
|
||||
mydev->textmode = i;
|
||||
update_display_visual(mydev);
|
||||
return count;
|
||||
}
|
||||
}
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(textmode, S_IWUGO | S_IRUGO,
|
||||
show_attr_textmode, set_attr_textmode);
|
||||
|
||||
|
||||
MYDEV_ATTR_SIMPLE_UNSIGNED(powered, update_display_powered);
|
||||
MYDEV_ATTR_SIMPLE_UNSIGNED(mode_msb, update_display_mode);
|
||||
MYDEV_ATTR_SIMPLE_UNSIGNED(mode_lsb, update_display_mode);
|
||||
|
||||
static struct attribute *dev_attrs[] = {
|
||||
&dev_attr_powered.attr,
|
||||
&dev_attr_text.attr,
|
||||
&dev_attr_textmode.attr,
|
||||
&dev_attr_decimals.attr,
|
||||
&dev_attr_mode_msb.attr,
|
||||
&dev_attr_mode_lsb.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static struct attribute_group dev_attr_grp = {
|
||||
.attrs = dev_attrs,
|
||||
};
|
||||
|
||||
static int sevseg_probe(struct usb_interface *interface,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
struct usb_device *udev = interface_to_usbdev(interface);
|
||||
struct usb_sevsegdev *mydev = NULL;
|
||||
int rc = -ENOMEM;
|
||||
|
||||
mydev = kzalloc(sizeof(struct usb_sevsegdev), GFP_KERNEL);
|
||||
if (mydev == NULL) {
|
||||
dev_err(&interface->dev, "Out of memory\n");
|
||||
goto error_mem;
|
||||
}
|
||||
|
||||
mydev->udev = usb_get_dev(udev);
|
||||
usb_set_intfdata(interface, mydev);
|
||||
|
||||
/*set defaults */
|
||||
mydev->textmode = 0x02; /* ascii mode */
|
||||
mydev->mode_msb = 0x06; /* 6 characters */
|
||||
mydev->mode_lsb = 0x3f; /* scanmode for 6 chars */
|
||||
|
||||
rc = sysfs_create_group(&interface->dev.kobj, &dev_attr_grp);
|
||||
if (rc)
|
||||
goto error;
|
||||
|
||||
dev_info(&interface->dev, "USB 7 Segment device now attached\n");
|
||||
return 0;
|
||||
|
||||
error:
|
||||
usb_set_intfdata(interface, NULL);
|
||||
usb_put_dev(mydev->udev);
|
||||
kfree(mydev);
|
||||
error_mem:
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void sevseg_disconnect(struct usb_interface *interface)
|
||||
{
|
||||
struct usb_sevsegdev *mydev;
|
||||
|
||||
mydev = usb_get_intfdata(interface);
|
||||
sysfs_remove_group(&interface->dev.kobj, &dev_attr_grp);
|
||||
usb_set_intfdata(interface, NULL);
|
||||
usb_put_dev(mydev->udev);
|
||||
kfree(mydev);
|
||||
dev_info(&interface->dev, "USB 7 Segment now disconnected\n");
|
||||
}
|
||||
|
||||
static struct usb_driver sevseg_driver = {
|
||||
.name = "usbsevseg",
|
||||
.probe = sevseg_probe,
|
||||
.disconnect = sevseg_disconnect,
|
||||
.id_table = id_table,
|
||||
};
|
||||
|
||||
static int __init usb_sevseg_init(void)
|
||||
{
|
||||
int rc = 0;
|
||||
|
||||
rc = usb_register(&sevseg_driver);
|
||||
if (rc)
|
||||
err("usb_register failed. Error number %d", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void __exit usb_sevseg_exit(void)
|
||||
{
|
||||
usb_deregister(&sevseg_driver);
|
||||
}
|
||||
|
||||
module_init(usb_sevseg_init);
|
||||
module_exit(usb_sevseg_exit);
|
||||
|
||||
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_LICENSE("GPL");
|
||||
Reference in New Issue