From: Rostislav Lisovy <lisovy@gmail.com>
Date: Sun, 13 Feb 2011 02:08:53 +0000 (+0100)
Subject: Simple userspace program reading some files exported by UIO driver (tested and seems... 
X-Git-Url: http://rtime.felk.cvut.cz/gitweb/mf6xx.git/commitdiff_plain/bd214ac63511a11f2722daca73a3f36bf7354bf4

Simple userspace program reading some files exported by UIO driver (tested and seems to be working)
---

diff --git a/src/uio/userspace/test_application/Makefile b/src/uio/userspace/test_application/Makefile
new file mode 100644
index 0000000..c8958d1
--- /dev/null
+++ b/src/uio/userspace/test_application/Makefile
@@ -0,0 +1,5 @@
+FLAGS=-Wall -pedantic
+
+all:
+	gcc main.c $(FLAGS) -std=c99 -o main
+ 
diff --git a/src/uio/userspace/test_application/main b/src/uio/userspace/test_application/main
new file mode 100755
index 0000000..ee65be1
Binary files /dev/null and b/src/uio/userspace/test_application/main differ
diff --git a/src/uio/userspace/test_application/main.c b/src/uio/userspace/test_application/main.c
new file mode 100644
index 0000000..10226e9
--- /dev/null
+++ b/src/uio/userspace/test_application/main.c
@@ -0,0 +1,174 @@
+#include <stdio.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <dirent.h>
+#include <sys/types.h>
+
+#define BUFF_SMALL	32
+#define BUFF_MID	256
+#define min(a, b) ((a) > (b) ? (b) : (a))
+
+int status;
+
+int open_device(char* path) {
+	status = open(path, O_RDWR);
+	if (status == -1) {
+		perror("open()");
+		return -1;
+	}
+
+	return status;
+}
+
+void wait_for_interrupts(int device_fd)
+{
+	read(device_fd, NULL, 1);
+}
+
+int disable_interrupts(int device_fd)
+{
+	char buff[4]; // we have to write 32 bit number
+	strncpy(buff, "0", 4);	
+
+	status = write(device_fd, buff, 4);
+	if (status == -1) {
+		perror("write()");
+		return -1;
+	}
+
+	return status;
+}
+
+int enable_interrupts(int device_fd)
+{
+	char buff[4]; // we have to write 32 bit number
+	strncpy(buff, "1", 4);	
+
+	status = write(device_fd, buff, 4);
+	if (status == -1) {
+		perror("write()");
+		return -1;
+	}
+
+	return status;
+}
+
+void list_available_mem_regions(char* device)
+{
+	char path[] = "/sys/class/uio/";
+	char subdir[] = "/maps/";
+	char directory[BUFF_MID];
+	memset(directory, '\0', BUFF_MID);
+
+	DIR *dip;
+	struct dirent *dit;
+
+	strncat(directory, path, strlen(path));
+	strncat(directory, device, min(strlen(device), 8));
+	strncat(directory, subdir, strlen(subdir));
+
+	dip = opendir(directory);
+	if (dip == NULL) {
+		perror("opendir");
+		return;
+	}
+
+	while ((dit = readdir(dip)) != NULL) {
+		if (strcmp(dit->d_name, ".") && strcmp(dit->d_name, "..")) {
+			printf(" %s\n", dit->d_name);
+		}
+	}
+
+	status = closedir(dip);
+	if (status == -1) {
+		perror("closedir()");
+		return;
+	}
+	
+}
+
+
+void list_available_io_ports(char *device)
+{
+	char path[] = "/sys/class/uio/";
+	char subdir[] = "/portio/";
+	char directory[BUFF_MID];
+	memset(directory, '\0', BUFF_MID);
+
+	DIR *dip;
+	struct dirent *dit;
+
+	strncat(directory, path, strlen(path));
+	strncat(directory, device, min(strlen(device), 8));
+	strncat(directory, subdir, strlen(subdir));
+
+	status = access(directory, F_OK);
+	if (status == -1) {
+		printf(" There are no IO port available\n");
+		return;
+	}
+
+	dip = opendir(directory);
+	if (dip == NULL) {
+		perror("opendir");
+		return;
+	}
+
+	while ((dit = readdir(dip)) != NULL) {
+		if (strcmp(dit->d_name, ".") && strcmp(dit->d_name, "..")) {
+			printf(" %s\n", dit->d_name);
+		}
+	}
+
+	status = closedir(dip);
+	if (status == -1) {
+		perror("closedir()");
+		return;
+	}
+
+}
+
+
+int main(int argc, char* argv[])
+{
+	int device_fd;
+	char buff[BUFF_SMALL];
+	memset(buff, '\0', BUFF_SMALL);
+
+	if (argc < 2) {
+		printf("Usage: %s UIO_DEVICE\n   UIO_DEVICE\tname of uio device in /dev\n", argv[0]);
+		return 1;
+	}	
+
+	strncat(buff, "/dev/", 5);
+	strncat(buff, argv[1], min(strlen(argv[1]), 8));
+
+	printf("Opening %s\n", buff);
+
+	device_fd = open_device(buff);
+	if (device_fd != -1) {
+		printf("Tring to enable interrupts\n");
+		status = enable_interrupts(device_fd);
+		if (status != -1) {
+			printf(" Probably OK\n");
+		}
+		
+		printf("Tring to disable interrupts\n");
+		status = disable_interrupts(device_fd);
+		if (status != -1) {
+			printf(" Probably OK\n");
+		}
+	}
+
+
+	printf("Checking for available memory regions exported by the UIO driver\n");
+	list_available_mem_regions(argv[1]);
+
+	printf("Checking for available IO ports exported by the UIO driver\n");
+	list_available_io_ports(argv[1]);
+
+	return 0;
+}