static void example(unsigned char n)
{
unsigned short i, j;
unsigned char matrix[CFAG12864B_WIDTH * CFAG12864B_HEIGHT];
if (n > EXAMPLES)
return;
printf("Example %i/%i - ", n, EXAMPLES);
switch (n) {
case 1:
printf("Draw points setting bits");
cfag12864b_clear();
for (i = 0; i < CFAG12864B_WIDTH; i += 2)
for (j = 0; j < CFAG12864B_HEIGHT; j += 2)
cfag12864b_set(i, j);
break;
case 2:
printf("Clear the LCD");
cfag12864b_clear();
break;
case 3:
printf("Draw rows formatting a [128*64] matrix");
memset(matrix, 0, CFAG12864B_WIDTH * CFAG12864B_HEIGHT);
for (i = 0; i < CFAG12864B_WIDTH; i++)
for (j = 0; j < CFAG12864B_HEIGHT; j += 2)
matrix[j * CFAG12864B_WIDTH + i] = 1;
cfag12864b_format(matrix);
break;
case 4:
printf("Fill the lcd");
cfag12864b_fill();
break;
case 5:
printf("Draw columns unsetting bits");
for (i = 0; i < CFAG12864B_WIDTH; i += 2)
for (j = 0; j < CFAG12864B_HEIGHT; j++)
cfag12864b_unset(i, j);
break;
case 6:
printf("Do negative not-ing all bits");
for (i = 0; i < CFAG12864B_WIDTH; i++)
for (j = 0; j < CFAG12864B_HEIGHT; j ++)
cfag12864b_not(i, j);
break;
}
puts(" - [Press Enter]");
}
static int __init cfag12864b_init(void)
{
int ret = -EINVAL;
/* ks0108_init() must be called first */
if (!ks0108_isinited()) {
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
"ks0108 is not initialized\n");
goto none;
}
if (PAGE_SIZE < CFAG12864B_SIZE) {
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
"page size (%i) < cfag12864b size (%i)\n",
(unsigned int)PAGE_SIZE, CFAG12864B_SIZE);
ret = -ENOMEM;
goto none;
}
cfag12864b_buffer = (unsigned char *) __get_free_page(GFP_KERNEL);
if (cfag12864b_buffer == NULL) {
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
"can't get a free page\n");
ret = -ENOMEM;
goto none;
}
cfag12864b_cache = kmalloc(sizeof(unsigned char) *
CFAG12864B_SIZE, GFP_KERNEL);
if (cfag12864b_buffer == NULL) {
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
"can't alloc cache buffer (%i bytes)\n",
CFAG12864B_SIZE);
ret = -ENOMEM;
goto bufferalloced;
}
cfag12864b_workqueue = create_singlethread_workqueue(CFAG12864B_NAME);
if (cfag12864b_workqueue == NULL)
goto cachealloced;
memset(cfag12864b_buffer, 0, CFAG12864B_SIZE);
cfag12864b_clear();
cfag12864b_on();
cfag12864b_inited = 1;
return 0;
cachealloced:
kfree(cfag12864b_cache);
bufferalloced:
free_page((unsigned long) cfag12864b_buffer);
none:
return ret;
}
static int __init cfag12864b_init(void)
{
int ret = -EINVAL;
if (!ks0108_isinited()) {
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
"ks0108 is not initialized\n");
goto none;
}
BUILD_BUG_ON(PAGE_SIZE < CFAG12864B_SIZE);
cfag12864b_buffer = (unsigned char *) get_zeroed_page(GFP_KERNEL);
if (cfag12864b_buffer == NULL) {
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
"can't get a free page\n");
ret = -ENOMEM;
goto none;
}
cfag12864b_cache = kmalloc(sizeof(unsigned char) *
CFAG12864B_SIZE, GFP_KERNEL);
if (cfag12864b_cache == NULL) {
printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
"can't alloc cache buffer (%i bytes)\n",
CFAG12864B_SIZE);
ret = -ENOMEM;
goto bufferalloced;
}
cfag12864b_workqueue = create_singlethread_workqueue(CFAG12864B_NAME);
if (cfag12864b_workqueue == NULL)
goto cachealloced;
cfag12864b_clear();
cfag12864b_on();
cfag12864b_inited = 1;
return 0;
cachealloced:
kfree(cfag12864b_cache);
bufferalloced:
free_page((unsigned long) cfag12864b_buffer);
none:
return ret;
}
