mirror of https://github.com/nirenjan/libx52.git
Add initial version of X52pro joystick driver
This is pretty much bare bones code to get a basic sysfs filesystem in place. It has only code to create sysfs files for the 3 MFD lines. Right now, this needs to be enabled by unplugging the joystick, insmod'ing the x52joy.ko module, rmmod'ing the usbhid module and replugging the joystick. We don't yet have a /dev/input/ interface and there's no interrupt message handling yet.pull/3/head
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e9bfeb0f02
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42642d5905
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# Compiled object files
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*.ko
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*.o
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*.mod.*
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# Module files
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modules.order
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Module.symvers
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.*.cmd
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.tmp_versions
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# Vim swap files
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.*.swp
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@ -0,0 +1,9 @@
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obj-m := x52joy.o
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KDIR := /lib/modules/$(shell uname -r)/build
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PWD := $(shell pwd)
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all:
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$(MAKE) -C $(KDIR) M=$(PWD) modules
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clean:
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$(MAKE) -C $(KDIR) M=$(PWD) clean
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@ -0,0 +1,225 @@
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/*
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* Saitek X52 Pro HOTAS driver - 1.0
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*
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* Copyright (C) 2012 Nirenjan Krishnan (nirenjan@nirenjan.org)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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*/
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#ifdef CONFIG_USB_DEBUG
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#define DEBUG 1
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#endif
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#define DRIVER_AUTHOR "Nirenjan Krishnan, nirenjan@gmail.com"
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#define DRIVER_DESC "Saitek X52Pro HOTAS Driver"
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#define VENDOR_ID_SAITEK 0x06a3
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#define PRODUCT_ID_X52_PRO 0x0762
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/* list of devices that work with this driver */
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static struct usb_device_id id_table[] = {
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{ USB_DEVICE(VENDOR_ID_SAITEK, PRODUCT_ID_X52_PRO) },
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/*
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* Future versions of this driver may support the original
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* X52 HOTAS joystick, but for now, only the X52 Pro is
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* supported.
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*/
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{ },
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};
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MODULE_DEVICE_TABLE (usb, id_table);
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/*
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* The X52 MFD supports the following:
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* - 3 lines of 16 characters each
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* - Clock with HH:MM
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* - Date with YYMMDD (IIRC)
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*/
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#define DRIVER_LINE_SIZE 256 /* Support upto 256 bytes in the driver */
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#define X52_MFD_LINE_SIZE 17 /* Add one for null byte */
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struct x52_mfd_line {
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u8 text[DRIVER_LINE_SIZE];
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u16 length;
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u16 current_pos;
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};
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struct x52_joy {
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struct usb_device *udev;
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u32 led_status;
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struct x52_mfd_line line[3];
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u8 time_hour;
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u8 time_min;
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u16 time_offs2;
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u16 time_offs3;
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u8 date_year;
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u8 date_month;
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u8 date_day;
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u8 mode_h24:1;
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u8 feat_mfd:1;
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u8 feat_led:1;
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u8 debug:1;
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};
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/**********************************************************************
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* MFD Line manipulation functions
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*********************************************************************/
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static void set_text(u8 line_no)
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{
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/* TODO */
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return;
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}
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static ssize_t show_text_line(struct device *dev, char *buf, u8 line)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct x52_joy *joy = usb_get_intfdata(intf);
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if (joy->feat_mfd) {
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return sprintf(buf, "%s\n", joy->line[line].text);
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} else {
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sprintf(buf, "\n");
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static ssize_t set_text_line(struct device *dev, const char *buf,\
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size_t count, u8 line)
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{
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struct usb_interface *intf = to_usb_interface(dev);
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struct x52_joy *joy = usb_get_intfdata(intf);
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u16 i;
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u16 length;
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if (!joy->feat_mfd) {
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return -EOPNOTSUPP;
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}
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/* Copy the string from src to dst, upto 16 characters max */
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for (i = 0, length = 0; i < DRIVER_LINE_SIZE - 1 && i < count; i++, length++) {
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joy->line[line].text[i] = buf[i];
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}
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joy->line[line].length = length;
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joy->line[line].current_pos = 0;
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/* Append empty bytes until the destination is full */
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for ( ; i < DRIVER_LINE_SIZE; i++) {
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/* The X52 pro MFD uses space characters as empty characters */
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joy->line[line].text[i] = 32;
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}
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set_text(line);
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return count;
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}
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#define show_set_text(no) \
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static ssize_t show_text_line##no(struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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return show_text_line(dev, buf, no); \
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} \
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static ssize_t set_text_line##no(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
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{ \
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return set_text_line(dev, buf, count, no); \
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} \
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static DEVICE_ATTR(line##no, S_IWUGO | S_IRUGO, show_text_line##no, set_text_line##no);
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show_set_text(1);
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show_set_text(2);
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show_set_text(3);
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/**********************************************************************
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* X52 driver functions
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*********************************************************************/
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static int x52_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct usb_device *dev = interface_to_usbdev(intf);
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struct x52_joy *joy = NULL;
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int retval = -ENOMEM;
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joy = kmalloc(sizeof(*joy), GFP_KERNEL);
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if (joy == NULL) {
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dev_err(&intf->dev, "Out of memory\n");
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goto error;
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}
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memset(joy, 0, sizeof(*joy));
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joy->udev = usb_get_dev(dev);
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/* Set the feature bits */
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joy->feat_mfd = 1;
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joy->feat_led = 1;
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usb_set_intfdata(intf, joy);
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device_create_file(&intf->dev, &dev_attr_line1);
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device_create_file(&intf->dev, &dev_attr_line2);
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device_create_file(&intf->dev, &dev_attr_line3);
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dev_info(&intf->dev, "X52 device now attached\n");
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return 0;
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error:
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kfree(joy);
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return retval;
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}
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static void x52_disconnect(struct usb_interface *intf)
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{
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struct x52_joy *joy;
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joy = usb_get_intfdata(intf);
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usb_set_intfdata(intf, NULL);
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device_remove_file(&intf->dev, &dev_attr_line1);
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device_remove_file(&intf->dev, &dev_attr_line2);
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device_remove_file(&intf->dev, &dev_attr_line3);
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usb_put_dev(joy->udev);
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kfree(joy);
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dev_info(&intf->dev, "X52 device now disconnected\n");
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}
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static struct usb_driver x52_driver = {
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.name = "X52",
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.probe = x52_probe,
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.disconnect = x52_disconnect,
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.id_table = id_table,
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};
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static int __init x52_init(void)
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{
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int retval = 0;
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retval = usb_register(&x52_driver);
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if (retval) {
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err("usb_register failed (errno=%d)\n", retval);
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}
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return retval;
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}
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static void __exit x52_exit(void)
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{
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usb_deregister(&x52_driver);
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}
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module_init (x52_init);
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module_exit (x52_exit);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL v2");
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