Prototyping, dig into libusb to figure out asnyc data handling

.gitignore

@@ -0,0 +1,95 @@
+#
+# NOTE! Don't add files that are generated in specific
+# subdirectories here. Add them in the ".gitignore" file
+# in that subdirectory instead.
+#
+# NOTE! Please use 'git ls-files -i --exclude-standard'
+# command after changing this file, to see if there are
+# any tracked files which get ignored after the change.
+#
+# Normal rules
+#
+.*
+*.o
+*.o.*
+*.a
+*.s
+*.ko
+*.so
+*.so.dbg
+*.mod.c
+*.i
+*.lst
+*.symtypes
+*.order
+modules.builtin
+*.elf
+*.bin
+*.gz
+*.bz2
+*.lzma
+*.xz
+*.lzo
+*.patch
+*.gcno
+a.out
+
+#
+# Top-level generic files
+#
+/tags
+/TAGS
+/linux
+/vmlinux
+/vmlinuz
+/System.map
+/Module.markers
+Module.symvers
+
+#
+# Debian directory (make deb-pkg)
+#
+/debian/
+
+#
+# git files that we don't want to ignore even it they are dot-files
+#
+!.gitignore
+!.mailmap
+
+#
+# Generated include files
+#
+include/config
+include/linux/version.h
+include/generated
+arch/*/include/generated
+
+# stgit generated dirs
+patches-*
+
+# quilt's files
+patches
+series
+
+# cscope files
+cscope.*
+ncscope.*
+
+# gnu global files
+GPATH
+GRTAGS
+GSYMS
+GTAGS
+
+*.orig
+*~
+\#*#
+
+#
+# Leavings from module signing
+#
+extra_certificates
+signing_key.priv
+signing_key.x509
+x509.genkey

Makefile

@@ -3,10 +3,7 @@
 obj-m += hanvon.o
  
 all:
-	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
- 
-clean:
-	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
+	gcc -L/usr/local/lib -lusb-1.0 hanvon-libusb.c -g
  
 archive:
 	tar f - --exclude=.git -C ../ -c hanvon | gzip -c9 > ../hanvon-`date +%Y%m%d`.tgz

hanvon-libusb.c

@@ -0,0 +1,143 @@
+/*
+ * =====================================================================================
+ *
+ *       Filename:  hanvon-libusb.c
+ *
+ *    Description:  Libusb GP0504 handler prototype
+ *
+ *        Version:  0.1 
+ *        Created:  08/17/2020 04:05:14 PM
+ *       Revision:  none
+ *       Compiler:  gcc
+ *
+ *         Author:  surkeh@protonmail.com
+ *
+ * =====================================================================================
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <libusb-1.0/libusb.h>
+
+#define STATE_SUCCESS 0
+#define STATE_NOT_FOUND 1
+
+#define UNREF_DEVICE 1 
+#define KEEP_DEVICE_REF 0 
+
+#define VENDOR_ID_HANVON	0x0b57
+#define PRODUCT_ID_AM3M		0x8528
+#define PRODUCT_ID_AM0806	0x8502
+#define PRODUCT_ID_AM0605	0x8503
+#define PRODUCT_ID_AM1107	0x8505
+#define PRODUCT_ID_AM1209	0x8501
+#define PRODUCT_ID_RL0604	0x851f
+#define PRODUCT_ID_RL0504	0x851d
+#define PRODUCT_ID_GP0806	0x8039
+#define PRODUCT_ID_GP0806B	0x8511
+#define PRODUCT_ID_GP0605	0x8512
+#define PRODUCT_ID_GP0605A	0x803a
+#define PRODUCT_ID_GP0504	0x8037
+#define PRODUCT_ID_NXS1513	0x8030
+#define PRODUCT_ID_GP0906	0x8521
+#define PRODUCT_ID_APPIV0906	0x8532
+
+#define AM_PACKET_LEN   10
+
+//static int lbuttons[]={BTN_0,BTN_1,BTN_2,BTN_3};   /* reported on all AMs */
+//static int rbuttons[]={BTN_4,BTN_5,BTN_6,BTN_7};   /* reported on AM1107+ */
+
+#define AM_WHEEL_THRESHOLD   4
+
+#define AM_MAX_TILT_X   0x3f
+#define AM_MAX_TILT_Y   0x7f
+#define AM_MAX_PRESSURE   0x400
+
+
+
+struct hanvon {
+	unsigned char *data;
+	//dma_addr_t data_dma;
+	struct input_dev *dev;
+	struct usb_device *usbdev;
+	struct urb *irq;
+	int old_wheel_pos;
+	char phys[32];
+};
+
+
+
+libusb_device *FindHanvon( libusb_context **context);
+int HandleData( void );
+
+
+
+int main()
+{
+  libusb_context **context;
+  libusb_device *device;
+  libusb_device_handle *handle;
+
+  int state = libusb_init( &context );
+  if( state != STATE_SUCCESS )
+    return state;
+
+  device = FindHanvon( context );
+  if( device == NULL )
+    return STATE_NOT_FOUND;
+
+  state = libusb_open( device, &handle );
+  if( state != STATE_SUCCESS )
+    return state;
+
+
+  // Wait and handle interrupts?
+  
+  return state;
+}
+
+
+
+libusb_device *FindHanvon( libusb_context **context)
+{
+    libusb_device **deviceList;
+    libusb_device *found = NULL;
+    ssize_t nDevices = libusb_get_device_list( context[0], &deviceList);
+    if( nDevices > 0 )
+      {
+        struct libusb_device_descriptor description;
+
+        for( ssize_t i = 0; i < nDevices; i++ )
+        {
+          libusb_device *device = deviceList[i]; 
+          libusb_get_device_descriptor(device, &description);
+          printf( "Dev%u ID %04x:%04x\n", (i + 1), description.idVendor, description.idProduct );
+          if( description.idVendor ==  VENDOR_ID_HANVON )
+          {
+            switch( description.idProduct )
+            case PRODUCT_ID_AM0806:
+            case PRODUCT_ID_AM0605:
+            case PRODUCT_ID_AM1107:
+            case PRODUCT_ID_AM1209:
+            case PRODUCT_ID_RL0604:
+            case PRODUCT_ID_RL0504:
+            case PRODUCT_ID_GP0806:
+            case PRODUCT_ID_GP0806B:
+            case PRODUCT_ID_GP0605:
+            case PRODUCT_ID_GP0605A:
+            case PRODUCT_ID_GP0504:
+            case PRODUCT_ID_NXS1513:
+            case PRODUCT_ID_GP0906:
+            case PRODUCT_ID_APPIV0906:
+              found = device;
+              break;
+          }
+        }
+        printf( "\n\n" );
+      }
+
+    libusb_free_device_list( deviceList, UNREF_DEVICE );
+    return found;
+}
+
+