2  * linux/drivers/video/arcfb.c -- FB driver for Arc monochrome LCD board
17  * GPIO-less system, the board can be tested by connecting the respective sigs
24  * - testing with 4x4
25  * - testing with interrupt hw
28  * - User must set tuhold. It's in microseconds. According to the 108 spec,
30  * - User must set num_cols=x num_rows=y, eg: x=2 means 128
31  * - User must set arcfb_enable=1 to enable it
32  * - User must set dio_addr=0xIOADDR cio_addr=0xIOADDR
53 #define floorXres(a,xres) (a&(~(xres - 1)))
56 #define ceilXres(a,xres) (a|(xres - 1))
118 	unsigned char chipselval = par->cslut[chipindex];  in ks108_writeb_ctl()
120 	outb(chipselval|KS_CEHI|KS_SEL_CMD, par->cio_addr);  in ks108_writeb_ctl()
121 	outb(value, par->dio_addr);  in ks108_writeb_ctl()
123 	outb(chipselval|KS_CELO|KS_SEL_CMD, par->cio_addr);  in ks108_writeb_ctl()
129 	outb(value, par->cio_addr);  in ks108_writeb_mainctl()
135 	return inb(par->c2io_addr);  in ks108_readb_ctl2()
141 	unsigned char chipselval = par->cslut[chipindex];  in ks108_writeb_data()
143 	outb(chipselval|KS_CEHI|KS_SEL_DATA, par->cio_addr);  in ks108_writeb_data()
144 	outb(value, par->dio_addr);  in ks108_writeb_data()
146 	outb(chipselval|KS_CELO|KS_SEL_DATA, par->cio_addr);  in ks108_writeb_data()
185 	struct arcfb_par *par = info->par;  in arcfb_open()
187 	atomic_inc(&par->ref_count);  in arcfb_open()
193 	struct arcfb_par *par = info->par;  in arcfb_release()
194 	int count = atomic_read(&par->ref_count);  in arcfb_release()
197 		return -EINVAL;  in arcfb_release()
198 	atomic_dec(&par->ref_count);  in arcfb_release()
206 	struct arcfb_par *par = info->par;  in arcfb_pan_display()
208 	if ((var->vmode & FB_VMODE_YWRAP) && (var->yoffset < 64)  in arcfb_pan_display()
209 		&& (info->var.yres <= 64)) {  in arcfb_pan_display()
211 			ks108_set_start_line(par, i, var->yoffset);  in arcfb_pan_display()
213 		info->var.yoffset = var->yoffset;  in arcfb_pan_display()
217 	return -EINVAL;  in arcfb_pan_display()
224 	struct arcfb_par *par = info->par;  in arcfb_interrupt()
233 	spin_lock(&par->lock);  in arcfb_interrupt()
237 	spin_unlock(&par->lock);  in arcfb_interrupt()
249 		unsigned int left, unsigned int right, unsigned int distance)  in arcfb_lcd_update_page()  argument
257 	xindex = left >> 6;  in arcfb_lcd_update_page()
263 	linesize = par->info->var.xres/8;  in arcfb_lcd_update_page()
264 	src = (unsigned char *)par->info->screen_buffer + (left/8) +  in arcfb_lcd_update_page()
266 	ks108_set_xaddr(par, chipindex, left);  in arcfb_lcd_update_page()
270 	while (left <= right) {  in arcfb_lcd_update_page()
275 						<< (i - rightshift);  in arcfb_lcd_update_page()
278 						 >> (rightshift - i);  in arcfb_lcd_update_page()
282 		left++;  in arcfb_lcd_update_page()
296  * lcd chips. update_page uses the upper/left values to decide which
300 static void arcfb_lcd_update_vert(struct arcfb_par *par, unsigned int top,  in arcfb_lcd_update_vert()  argument
301 		unsigned int bottom, unsigned int left, unsigned int right)  in arcfb_lcd_update_vert()  argument
305 	distance = (bottom - top) + 1;  in arcfb_lcd_update_vert()
306 	upper = top;  in arcfb_lcd_update_vert()
307 	lower = top + 7;  in arcfb_lcd_update_vert()
310 		distance -= 8;  in arcfb_lcd_update_vert()
311 		arcfb_lcd_update_page(par, upper, left, right, 8);  in arcfb_lcd_update_vert()
322 static void arcfb_lcd_update_horiz(struct arcfb_par *par, unsigned int left,  in arcfb_lcd_update_horiz()  argument
323 			unsigned int right, unsigned int top, unsigned int h)  in arcfb_lcd_update_horiz()  argument
328 	upper = floor8(top);  in arcfb_lcd_update_horiz()
329 	lower = min(upper + distance - 1, ceil64(upper));  in arcfb_lcd_update_horiz()
332 		distance -= ((lower - upper) + 1 );  in arcfb_lcd_update_horiz()
333 		arcfb_lcd_update_vert(par, upper, lower, left, right);  in arcfb_lcd_update_horiz()
335 		lower = min(upper + distance - 1, ceil64(upper));  in arcfb_lcd_update_horiz()
347 	unsigned int left, right, distance, y;  in arcfb_lcd_update()  local
351 	h += dy - y;  in arcfb_lcd_update()
355 	left = dx;  in arcfb_lcd_update()
356 	right = min(left + w - 1, ceil64(left));  in arcfb_lcd_update()
359 		arcfb_lcd_update_horiz(par, left, right, y, h);  in arcfb_lcd_update()
360 		distance -= ((right - left) + 1);  in arcfb_lcd_update()
361 		left = right + 1;  in arcfb_lcd_update()
362 		right = min(left + distance - 1, ceil64(left));  in arcfb_lcd_update()
370 	struct arcfb_par *par = info->par;  in arcfb_ioctl()
378 			if (!par->irq)  in arcfb_ioctl()
379 				return -EINVAL;  in arcfb_ioctl()
383 			spin_lock_irqsave(&par->lock, flags);  in arcfb_ioctl()
386 			spin_unlock_irqrestore(&par->lock, flags);  in arcfb_ioctl()
396 			ctl2 = ks108_readb_ctl2(info->par);  in arcfb_ioctl()
398 				return -EFAULT;  in arcfb_ioctl()
402 			return -EINVAL;  in arcfb_ioctl()
408 	struct arcfb_par *par = info->par;  in arcfb_damage_range()
409 	unsigned int xres = info->var.xres;  in arcfb_damage_range()
416 	bitcount = endpos - startpos;  in arcfb_damage_range()
429 	struct arcfb_par *par = info->par;  in arcfb_damage_area()
453 	int retval = -ENOMEM;  in arcfb_probe()
462 	   less-flat actual paged framebuffer */  in arcfb_probe()
467 	info = framebuffer_alloc(sizeof(struct arcfb_par), &dev->dev);  in arcfb_probe()
471 	info->flags |= FBINFO_VIRTFB;  in arcfb_probe()
472 	info->screen_buffer = videomemory;  in arcfb_probe()
473 	info->fbops = &arcfb_ops;  in arcfb_probe()
475 	info->var = arcfb_var;  in arcfb_probe()
476 	info->fix = arcfb_fix;  in arcfb_probe()
477 	par = info->par;  in arcfb_probe()
478 	par->info = info;  in arcfb_probe()
484 	par->dio_addr = dio_addr;  in arcfb_probe()
485 	par->cio_addr = cio_addr;  in arcfb_probe()
486 	par->c2io_addr = c2io_addr;  in arcfb_probe()
487 	par->cslut[0] = 0x00;  in arcfb_probe()
488 	par->cslut[1] = 0x06;  in arcfb_probe()
489 	spin_lock_init(&par->lock);  in arcfb_probe()
491 		par->irq = irq;  in arcfb_probe()
492 		if (request_irq(par->irq, &arcfb_interrupt, IRQF_SHARED,  in arcfb_probe()
495 				"arcfb: Failed req IRQ %d\n", par->irq);  in arcfb_probe()
496 			retval = -EBUSY;  in arcfb_probe()
528 	free_irq(par->irq, info);  in arcfb_probe()
543 			free_irq(((struct arcfb_par *)(info->par))->irq, info);  in arcfb_remove()
544 		vfree(info->screen_buffer);  in arcfb_remove()
564 		return -ENXIO;  in arcfb_init()
572 			ret = -ENOMEM;  in arcfb_init()