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acrn-kernel/drivers/usb/misc/phidgetkit.c

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/*
* USB PhidgetInterfaceKit driver 1.0
*
* Copyright (C) 2004 Sean Young <sean@mess.org>
* Copyright (C) 2004 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; either version 2 of the License, or
* (at your option) any later version.
*
* This is a driver for the USB PhidgetInterfaceKit.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>
#define DRIVER_AUTHOR "Sean Young <sean@mess.org>"
#define DRIVER_DESC "USB PhidgetInterfaceKit Driver"
#define USB_VENDOR_ID_GLAB 0x06c2
#define USB_DEVICE_ID_INTERFACEKIT004 0x0040
#define USB_DEVICE_ID_INTERFACEKIT888 0x0045
#define USB_DEVICE_ID_INTERFACEKIT047 0x0051
#define USB_DEVICE_ID_INTERFACEKIT088 0x0053
#define USB_VENDOR_ID_WISEGROUP 0x0925
#define USB_DEVICE_ID_INTERFACEKIT884 0x8201
#define MAX_INTERFACES 8
struct driver_interfacekit {
int sensors;
int inputs;
int outputs;
int has_lcd;
};
#define ifkit(_sensors, _inputs, _outputs, _lcd) \
static struct driver_interfacekit ph_##_sensors##_inputs##_outputs = { \
.sensors = _sensors, \
.inputs = _inputs, \
.outputs = _outputs, \
.has_lcd = _lcd, \
};
ifkit(0, 0, 4, 0);
ifkit(8, 8, 8, 0);
ifkit(0, 4, 7, 1);
ifkit(8, 8, 4, 0);
ifkit(0, 8, 8, 1);
struct phidget_interfacekit {
struct usb_device *udev;
struct usb_interface *intf;
struct driver_interfacekit *ifkit;
int outputs[MAX_INTERFACES];
int inputs[MAX_INTERFACES];
int sensors[MAX_INTERFACES];
u8 lcd_files_on;
struct urb *irq;
unsigned char *data;
dma_addr_t data_dma;
};
static struct usb_device_id id_table[] = {
{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT004),
.driver_info = (kernel_ulong_t)&ph_004},
{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT888),
.driver_info = (kernel_ulong_t)&ph_888},
{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT047),
.driver_info = (kernel_ulong_t)&ph_047},
{USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT088),
.driver_info = (kernel_ulong_t)&ph_088},
{USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_INTERFACEKIT884),
.driver_info = (kernel_ulong_t)&ph_884},
{}
};
MODULE_DEVICE_TABLE(usb, id_table);
static int change_outputs(struct phidget_interfacekit *kit, int output_num, int enable)
{
unsigned char *buffer;
int retval;
int n;
buffer = kmalloc(4, GFP_KERNEL);
if (!buffer) {
dev_err(&kit->udev->dev, "%s - out of memory\n",
__FUNCTION__);
return -ENOMEM;
}
kit->outputs[output_num] = enable;
memset(buffer, 0, 4);
for (n=0; n<8; n++) {
if (kit->outputs[n]) {
buffer[0] |= 1 << n;
}
}
dev_dbg(&kit->udev->dev, "sending data: %02x\n", buffer[0]);
retval = usb_control_msg(kit->udev,
usb_sndctrlpipe(kit->udev, 0),
0x09, 0x21, 0x0200, 0x0000, buffer, 4, 2000);
if (retval != 4)
dev_err(&kit->udev->dev, "usb_control_msg returned %d\n",
retval);
kfree(buffer);
return retval < 0 ? retval : 0;
}
static int change_string(struct phidget_interfacekit *kit, const char *display, unsigned char row)
{
unsigned char *buffer;
unsigned char *form_buffer;
int retval = -ENOMEM;
int i,j, len, buf_ptr;
buffer = kmalloc(8, GFP_KERNEL);
form_buffer = kmalloc(30, GFP_KERNEL);
if ((!buffer) || (!form_buffer)) {
dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
goto exit;
}
len = strlen(display);
if (len > 20)
len = 20;
dev_dbg(&kit->udev->dev, "Setting LCD line %d to %s\n", row, display);
form_buffer[0] = row * 0x40 + 0x80;
form_buffer[1] = 0x02;
buf_ptr = 2;
for (i = 0; i<len; i++)
form_buffer[buf_ptr++] = display[i];
for (i = 0; i < (20 - len); i++)
form_buffer[buf_ptr++] = 0x20;
form_buffer[buf_ptr++] = 0x01;
form_buffer[buf_ptr++] = row * 0x40 + 0x80 + strlen(display);
for (i = 0; i < buf_ptr; i += 7) {
if ((buf_ptr - i) > 7)
len = 7;
else
len = (buf_ptr - i);
for (j = 0; j < len; j++)
buffer[j] = form_buffer[i + j];
buffer[7] = len;
retval = usb_control_msg(kit->udev,
usb_sndctrlpipe(kit->udev, 0),
0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
if (retval < 0)
goto exit;
}
retval = 0;
exit:
kfree(buffer);
kfree(form_buffer);
return retval;
}
#define set_lcd_line(number) \
static ssize_t lcd_line_##number(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
struct usb_interface *intf = to_usb_interface(dev); \
struct phidget_interfacekit *kit = usb_get_intfdata(intf); \
change_string(kit, buf, number - 1); \
return count; \
} \
static DEVICE_ATTR(lcd_line_##number, S_IWUGO, NULL, lcd_line_##number);
set_lcd_line(1);
set_lcd_line(2);
static ssize_t set_backlight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct usb_interface *intf = to_usb_interface(dev);
struct phidget_interfacekit *kit = usb_get_intfdata(intf);
int enabled;
unsigned char *buffer;
int retval = -ENOMEM;
buffer = kmalloc(8, GFP_KERNEL);
if (!buffer) {
dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
goto exit;
}
if (sscanf(buf, "%d", &enabled) < 1) {
retval = -EINVAL;
goto exit;
}
memset(buffer, 0x00, 8);
if (enabled)
buffer[0] = 0x01;
buffer[7] = 0x11;
dev_dbg(&kit->udev->dev, "Setting backlight to %s\n", enabled ? "on" : "off");
retval = usb_control_msg(kit->udev,
usb_sndctrlpipe(kit->udev, 0),
0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
if (retval < 0)
goto exit;
retval = count;
exit:
kfree(buffer);
return retval;
}
static DEVICE_ATTR(backlight, S_IWUGO, NULL, set_backlight);
static void remove_lcd_files(struct phidget_interfacekit *kit)
{
if (kit->lcd_files_on) {
dev_dbg(&kit->udev->dev, "Removing lcd files\n");
device_remove_file(&kit->intf->dev, &dev_attr_lcd_line_1);
device_remove_file(&kit->intf->dev, &dev_attr_lcd_line_2);
device_remove_file(&kit->intf->dev, &dev_attr_backlight);
}
}
static ssize_t enable_lcd_files(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct usb_interface *intf = to_usb_interface(dev);
struct phidget_interfacekit *kit = usb_get_intfdata(intf);
int enable;
if (kit->ifkit->has_lcd == 0)
return -ENODEV;
if (sscanf(buf, "%d", &enable) < 1)
return -EINVAL;
if (enable) {
if (!kit->lcd_files_on) {
dev_dbg(&kit->udev->dev, "Adding lcd files\n");
device_create_file(&kit->intf->dev, &dev_attr_lcd_line_1);
device_create_file(&kit->intf->dev, &dev_attr_lcd_line_2);
device_create_file(&kit->intf->dev, &dev_attr_backlight);
kit->lcd_files_on = 1;
}
} else {
if (kit->lcd_files_on) {
remove_lcd_files(kit);
kit->lcd_files_on = 0;
}
}
return count;
}
static DEVICE_ATTR(lcd, S_IWUGO, NULL, enable_lcd_files);
static void interfacekit_irq(struct urb *urb, struct pt_regs *regs)
{
struct phidget_interfacekit *kit = urb->context;
unsigned char *buffer = kit->data;
int status;
int n;
switch (urb->status) {
case 0: /* success */
break;
case -ECONNRESET: /* unlink */
case -ENOENT:
case -ESHUTDOWN:
return;
/* -EPIPE: should clear the halt */
default: /* error */
goto resubmit;
}
for (n=0; n<8; n++) {
kit->inputs[n] = buffer[1] & (1 << n) ? 1 : 0;
}
if (buffer[0] & 1) {
kit->sensors[4] = buffer[2] + (buffer[3] & 0x0f) * 256;
kit->sensors[5] = buffer[4] + (buffer[3] & 0xf0) * 16;
kit->sensors[6] = buffer[5] + (buffer[6] & 0x0f) * 256;
kit->sensors[7] = buffer[7] + (buffer[6] & 0xf0) * 16;
} else {
kit->sensors[0] = buffer[2] + (buffer[3] & 0x0f) * 256;
kit->sensors[1] = buffer[4] + (buffer[3] & 0xf0) * 16;
kit->sensors[2] = buffer[5] + (buffer[6] & 0x0f) * 256;
kit->sensors[3] = buffer[7] + (buffer[6] & 0xf0) * 16;
}
resubmit:
status = usb_submit_urb(urb, SLAB_ATOMIC);
if (status)
err("can't resubmit intr, %s-%s/interfacekit0, status %d",
kit->udev->bus->bus_name,
kit->udev->devpath, status);
}
#define show_set_output(value) \
static ssize_t set_output##value(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
struct usb_interface *intf = to_usb_interface(dev); \
struct phidget_interfacekit *kit = usb_get_intfdata(intf); \
int enabled; \
int retval; \
\
if (sscanf(buf, "%d", &enabled) < 1) { \
return -EINVAL; \
} \
\
retval = change_outputs(kit, value - 1, enabled ? 1 : 0); \
\
return retval ? retval : count; \
} \
\
static ssize_t show_output##value(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct usb_interface *intf = to_usb_interface(dev); \
struct phidget_interfacekit *kit = usb_get_intfdata(intf); \
\
return sprintf(buf, "%d\n", kit->outputs[value - 1]); \
} \
static DEVICE_ATTR(output##value, S_IWUGO | S_IRUGO, \
show_output##value, set_output##value);
show_set_output(1);
show_set_output(2);
show_set_output(3);
show_set_output(4);
show_set_output(5);
show_set_output(6);
show_set_output(7);
show_set_output(8); /* should be MAX_INTERFACES - 1 */
#define show_input(value) \
static ssize_t show_input##value(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct usb_interface *intf = to_usb_interface(dev); \
struct phidget_interfacekit *kit = usb_get_intfdata(intf); \
\
return sprintf(buf, "%d\n", kit->inputs[value - 1]); \
} \
static DEVICE_ATTR(input##value, S_IRUGO, show_input##value, NULL);
show_input(1);
show_input(2);
show_input(3);
show_input(4);
show_input(5);
show_input(6);
show_input(7);
show_input(8); /* should be MAX_INTERFACES - 1 */
#define show_sensor(value) \
static ssize_t show_sensor##value(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct usb_interface *intf = to_usb_interface(dev); \
struct phidget_interfacekit *kit = usb_get_intfdata(intf); \
\
return sprintf(buf, "%d\n", kit->sensors[value - 1]); \
} \
static DEVICE_ATTR(sensor##value, S_IRUGO, show_sensor##value, NULL);
show_sensor(1);
show_sensor(2);
show_sensor(3);
show_sensor(4);
show_sensor(5);
show_sensor(6);
show_sensor(7);
show_sensor(8); /* should be MAX_INTERFACES - 1 */
static int interfacekit_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct phidget_interfacekit *kit;
struct driver_interfacekit *ifkit;
int pipe, maxp;
ifkit = (struct driver_interfacekit *)id->driver_info;
if (!ifkit)
return -ENODEV;
interface = intf->cur_altsetting;
if (interface->desc.bNumEndpoints != 1)
return -ENODEV;
endpoint = &interface->endpoint[0].desc;
if (!(endpoint->bEndpointAddress & 0x80))
return -ENODEV;
/*
* bmAttributes
*/
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
kit = kmalloc(sizeof(*kit), GFP_KERNEL);
if (kit == NULL) {
dev_err(&intf->dev, "%s - out of memory\n", __FUNCTION__);
return -ENOMEM;
}
memset(kit, 0, sizeof(*kit));
kit->ifkit = ifkit;
kit->data = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &kit->data_dma);
if (!kit->data) {
kfree(kit);
return -ENOMEM;
}
kit->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!kit->irq) {
usb_buffer_free(dev, 8, kit->data, kit->data_dma);
kfree(kit);
return -ENOMEM;
}
kit->udev = usb_get_dev(dev);
kit->intf = intf;
usb_fill_int_urb(kit->irq, kit->udev, pipe, kit->data,
(maxp > 8 ? 8 : maxp),
interfacekit_irq, kit, endpoint->bInterval);
kit->irq->transfer_dma = kit->data_dma;
kit->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
usb_set_intfdata(intf, kit);
if (usb_submit_urb(kit->irq, GFP_KERNEL)) {
return -EIO;
}
if (ifkit->outputs >= 4) {
device_create_file(&intf->dev, &dev_attr_output1);
device_create_file(&intf->dev, &dev_attr_output2);
device_create_file(&intf->dev, &dev_attr_output3);
device_create_file(&intf->dev, &dev_attr_output4);
}
if (ifkit->outputs == 8) {
device_create_file(&intf->dev, &dev_attr_output5);
device_create_file(&intf->dev, &dev_attr_output6);
device_create_file(&intf->dev, &dev_attr_output7);
device_create_file(&intf->dev, &dev_attr_output8);
}
if (ifkit->inputs >= 4) {
device_create_file(&intf->dev, &dev_attr_input1);
device_create_file(&intf->dev, &dev_attr_input2);
device_create_file(&intf->dev, &dev_attr_input3);
device_create_file(&intf->dev, &dev_attr_input4);
}
if (ifkit->inputs == 8) {
device_create_file(&intf->dev, &dev_attr_input5);
device_create_file(&intf->dev, &dev_attr_input6);
device_create_file(&intf->dev, &dev_attr_input7);
device_create_file(&intf->dev, &dev_attr_input8);
}
if (ifkit->sensors >= 4) {
device_create_file(&intf->dev, &dev_attr_sensor1);
device_create_file(&intf->dev, &dev_attr_sensor2);
device_create_file(&intf->dev, &dev_attr_sensor3);
device_create_file(&intf->dev, &dev_attr_sensor4);
}
if (ifkit->sensors >= 7) {
device_create_file(&intf->dev, &dev_attr_sensor5);
device_create_file(&intf->dev, &dev_attr_sensor6);
device_create_file(&intf->dev, &dev_attr_sensor7);
}
if (ifkit->sensors == 8) {
device_create_file(&intf->dev, &dev_attr_sensor8);
}
if (ifkit->has_lcd)
device_create_file(&intf->dev, &dev_attr_lcd);
dev_info(&intf->dev, "USB PhidgetInterfaceKit %d/%d/%d attached\n",
ifkit->sensors, ifkit->inputs, ifkit->outputs);
return 0;
}
static void interfacekit_disconnect(struct usb_interface *interface)
{
struct phidget_interfacekit *kit;
kit = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
if (!kit)
return;
if (kit->ifkit->outputs >= 4) {
device_remove_file(&interface->dev, &dev_attr_output1);
device_remove_file(&interface->dev, &dev_attr_output2);
device_remove_file(&interface->dev, &dev_attr_output3);
device_remove_file(&interface->dev, &dev_attr_output4);
}
if (kit->ifkit->outputs == 8) {
device_remove_file(&interface->dev, &dev_attr_output5);
device_remove_file(&interface->dev, &dev_attr_output6);
device_remove_file(&interface->dev, &dev_attr_output7);
device_remove_file(&interface->dev, &dev_attr_output8);
}
if (kit->ifkit->inputs >= 4) {
device_remove_file(&interface->dev, &dev_attr_input1);
device_remove_file(&interface->dev, &dev_attr_input2);
device_remove_file(&interface->dev, &dev_attr_input3);
device_remove_file(&interface->dev, &dev_attr_input4);
}
if (kit->ifkit->inputs == 8) {
device_remove_file(&interface->dev, &dev_attr_input5);
device_remove_file(&interface->dev, &dev_attr_input6);
device_remove_file(&interface->dev, &dev_attr_input7);
device_remove_file(&interface->dev, &dev_attr_input8);
}
if (kit->ifkit->sensors >= 4) {
device_remove_file(&interface->dev, &dev_attr_sensor1);
device_remove_file(&interface->dev, &dev_attr_sensor2);
device_remove_file(&interface->dev, &dev_attr_sensor3);
device_remove_file(&interface->dev, &dev_attr_sensor4);
}
if (kit->ifkit->sensors >= 7) {
device_remove_file(&interface->dev, &dev_attr_sensor5);
device_remove_file(&interface->dev, &dev_attr_sensor6);
device_remove_file(&interface->dev, &dev_attr_sensor7);
}
if (kit->ifkit->sensors == 8) {
device_remove_file(&interface->dev, &dev_attr_sensor8);
}
if (kit->ifkit->has_lcd)
device_remove_file(&interface->dev, &dev_attr_lcd);
dev_info(&interface->dev, "USB PhidgetInterfaceKit %d/%d/%d detached\n",
kit->ifkit->sensors, kit->ifkit->inputs, kit->ifkit->outputs);
usb_kill_urb(kit->irq);
usb_free_urb(kit->irq);
usb_buffer_free(kit->udev, 8, kit->data, kit->data_dma);
usb_put_dev(kit->udev);
kfree(kit);
}
static struct usb_driver interfacekit_driver = {
.name = "phidgetkit",
.probe = interfacekit_probe,
.disconnect = interfacekit_disconnect,
.id_table = id_table
};
static int __init interfacekit_init(void)
{
int retval = 0;
retval = usb_register(&interfacekit_driver);
if (retval)
err("usb_register failed. Error number %d", retval);
return retval;
}
static void __exit interfacekit_exit(void)
{
usb_deregister(&interfacekit_driver);
}
module_init(interfacekit_init);
module_exit(interfacekit_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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