video/fbdev/68328fb.c

87 static int mc68x328fb_check_var(struct fb_var_screeninfo *var,
92 static int mc68x328fb_pan_display(struct fb_var_screeninfo *var,
124      *  to hardware, it should only verify and adjust var.
126      *  data from it to check this var.
129 static int mc68x328fb_check_var(struct fb_var_screeninfo *var,
139 	if (var->vmode & FB_VMODE_CONUPDATE) {
140 		var->vmode |= FB_VMODE_YWRAP;
141 		var->xoffset = info->var.xoffset;
142 		var->yoffset = info->var.yoffset;
148 	if (!var->xres)
149 		var->xres = 1;
150 	if (!var->yres)
151 		var->yres = 1;
152 	if (var->xres > var->xres_virtual)
153 		var->xres_virtual = var->xres;
154 	if (var->yres > var->yres_virtual)
155 		var->yres_virtual = var->yres;
156 	if (var->bits_per_pixel <= 1)
157 		var->bits_per_pixel = 1;
158 	else if (var->bits_per_pixel <= 8)
159 		var->bits_per_pixel = 8;
160 	else if (var->bits_per_pixel <= 16)
161 		var->bits_per_pixel = 16;
162 	else if (var->bits_per_pixel <= 24)
163 		var->bits_per_pixel = 24;
164 	else if (var->bits_per_pixel <= 32)
165 		var->bits_per_pixel = 32;
169 	if (var->xres_virtual < var->xoffset + var->xres)
170 		var->xres_virtual = var->xoffset + var->xres;
171 	if (var->yres_virtual < var->yoffset + var->yres)
172 		var->yres_virtual = var->yoffset + var->yres;
178 	    get_line_length(var->xres_virtual, var->bits_per_pixel);
179 	if (line_length * var->yres_virtual > videomemorysize)
183 	 * Now that we checked it we alter var. The reason being is that the video
187 	switch (var->bits_per_pixel) {
189 		var->red.offset = 0;
190 		var->red.length = 1;
191 		var->green.offset = 0;
192 		var->green.length = 1;
193 		var->blue.offset = 0;
194 		var->blue.length = 1;
195 		var->transp.offset = 0;
196 		var->transp.length = 0;
199 		var->red.offset = 0;
200 		var->red.length = 8;
201 		var->green.offset = 0;
202 		var->green.length = 8;
203 		var->blue.offset = 0;
204 		var->blue.length = 8;
205 		var->transp.offset = 0;
206 		var->transp.length = 0;
209 		if (var->transp.length) {
210 			var->red.offset = 0;
211 			var->red.length = 5;
212 			var->green.offset = 5;
213 			var->green.length = 5;
214 			var->blue.offset = 10;
215 			var->blue.length = 5;
216 			var->transp.offset = 15;
217 			var->transp.length = 1;
219 			var->red.offset = 0;
220 			var->red.length = 5;
221 			var->green.offset = 5;
222 			var->green.length = 6;
223 			var->blue.offset = 11;
224 			var->blue.length = 5;
225 			var->transp.offset = 0;
226 			var->transp.length = 0;
230 		var->red.offset = 0;
231 		var->red.length = 8;
232 		var->green.offset = 8;
233 		var->green.length = 8;
234 		var->blue.offset = 16;
235 		var->blue.length = 8;
236 		var->transp.offset = 0;
237 		var->transp.length = 0;
240 		var->red.offset = 0;
241 		var->red.length = 8;
242 		var->green.offset = 8;
243 		var->green.length = 8;
244 		var->blue.offset = 16;
245 		var->blue.length = 8;
246 		var->transp.offset = 24;
247 		var->transp.length = 8;
250 	var->red.msb_right = 0;
251 	var->green.msb_right = 0;
252 	var->blue.msb_right = 0;
253 	var->transp.msb_right = 0;
264 	info->fix.line_length = get_line_length(info->var.xres_virtual,
265 						info->var.bits_per_pixel);
272      *  entries in the var structure). Return != 0 for invalid regno.
285 	if (info->var.grayscale) {
292 	 *   var->{color}.offset contains start of bitfield
293 	 *   var->{color}.length contains length of bitfield
300 	 *    var->{color}.offset is 0
301 	 *    var->{color}.length contains width of DAC
306 	 *    var->{color}.offset contains start of bitfield
307 	 *    var->{color}.length contains length of bitfield
316 		red = CNVT_TOHW(red, info->var.red.length);
317 		green = CNVT_TOHW(green, info->var.green.length);
318 		blue = CNVT_TOHW(blue, info->var.blue.length);
319 		transp = CNVT_TOHW(transp, info->var.transp.length);
337 		v = (red << info->var.red.offset) |
338 		    (green << info->var.green.offset) |
339 		    (blue << info->var.blue.offset) |
340 		    (transp << info->var.transp.offset);
341 		switch (info->var.bits_per_pixel) {
363 static int mc68x328fb_pan_display(struct fb_var_screeninfo *var,
366 	if (var->vmode & FB_VMODE_YWRAP) {
367 		if (var->yoffset < 0
368 		    || var->yoffset >= info->var.yres_virtual
369 		    || var->xoffset)
372 		if (var->xoffset + info->var.xres > info->var.xres_virtual ||
373 		    var->yoffset + info->var.yres > info->var.yres_virtual)
376 	info->var.xoffset = var->xoffset;
377 	info->var.yoffset = var->yoffset;
378 	if (var->vmode & FB_VMODE_YWRAP)
379 		info->var.vmode |= FB_VMODE_YWRAP;
381 		info->var.vmode &= ~FB_VMODE_YWRAP;
437 	fb_info.var = mc68x328fb_default;
445 	if (fb_info.var.bits_per_pixel == 1) {
446 		fb_info.var.red.length = fb_info.var.green.length = fb_info.var.blue.length = 1;
447 		fb_info.var.red.offset = fb_info.var.green.offset = fb_info.var.blue.offset = 0;