xref: /openbmc/linux/drivers/video/fbdev/vt8623fb.c (revision 0ba2fa8c)
1 /*
2  * linux/drivers/video/vt8623fb.c - fbdev driver for
3  * integrated graphic core in VIA VT8623 [CLE266] chipset
4  *
5  * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>
6  *
7  * This file is subject to the terms and conditions of the GNU General Public
8  * License.  See the file COPYING in the main directory of this archive for
9  * more details.
10  *
11  * Code is based on s3fb, some parts are from David Boucher's viafb
12  * (http://davesdomain.org.uk/viafb/)
13  */
14 
15 #include <linux/aperture.h>
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/string.h>
20 #include <linux/mm.h>
21 #include <linux/tty.h>
22 #include <linux/delay.h>
23 #include <linux/fb.h>
24 #include <linux/svga.h>
25 #include <linux/init.h>
26 #include <linux/pci.h>
27 #include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */
28 #include <video/vga.h>
29 
30 struct vt8623fb_info {
31 	char __iomem *mmio_base;
32 	int wc_cookie;
33 	struct vgastate state;
34 	struct mutex open_lock;
35 	unsigned int ref_count;
36 	u32 pseudo_palette[16];
37 };
38 
39 
40 
41 /* ------------------------------------------------------------------------- */
42 
43 static const struct svga_fb_format vt8623fb_formats[] = {
44 	{ 0,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
45 		FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP8,	FB_VISUAL_PSEUDOCOLOR, 16, 16},
46 	{ 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
47 		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_PSEUDOCOLOR, 16, 16},
48 	{ 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 1,
49 		FB_TYPE_INTERLEAVED_PLANES, 1,		FB_VISUAL_PSEUDOCOLOR, 16, 16},
50 	{ 8,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
51 		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_PSEUDOCOLOR, 8, 8},
52 /*	{16,  {10, 5, 0}, {5, 5, 0},  {0, 5, 0}, {0, 0, 0}, 0,
53 		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 4, 4},	*/
54 	{16,  {11, 5, 0}, {5, 6, 0},  {0, 5, 0}, {0, 0, 0}, 0,
55 		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 4, 4},
56 	{32,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
57 		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 2, 2},
58 	SVGA_FORMAT_END
59 };
60 
61 static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3,
62 	60000, 300000, 14318};
63 
64 /* CRT timing register sets */
65 
66 static const struct vga_regset vt8623_h_total_regs[]       = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END};
67 static const struct vga_regset vt8623_h_display_regs[]     = {{0x01, 0, 7}, VGA_REGSET_END};
68 static const struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END};
69 static const struct vga_regset vt8623_h_blank_end_regs[]   = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END};
70 static const struct vga_regset vt8623_h_sync_start_regs[]  = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END};
71 static const struct vga_regset vt8623_h_sync_end_regs[]    = {{0x05, 0, 4}, VGA_REGSET_END};
72 
73 static const struct vga_regset vt8623_v_total_regs[]       = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END};
74 static const struct vga_regset vt8623_v_display_regs[]     = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END};
75 static const struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END};
76 static const struct vga_regset vt8623_v_blank_end_regs[]   = {{0x16, 0, 7}, VGA_REGSET_END};
77 static const struct vga_regset vt8623_v_sync_start_regs[]  = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END};
78 static const struct vga_regset vt8623_v_sync_end_regs[]    = {{0x11, 0, 3}, VGA_REGSET_END};
79 
80 static const struct vga_regset vt8623_offset_regs[]        = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END};
81 static const struct vga_regset vt8623_line_compare_regs[]  = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x33, 0, 2}, {0x35, 4, 4}, VGA_REGSET_END};
82 static const struct vga_regset vt8623_fetch_count_regs[]   = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END};
83 static const struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END};
84 
85 static const struct svga_timing_regs vt8623_timing_regs     = {
86 	vt8623_h_total_regs, vt8623_h_display_regs, vt8623_h_blank_start_regs,
87 	vt8623_h_blank_end_regs, vt8623_h_sync_start_regs, vt8623_h_sync_end_regs,
88 	vt8623_v_total_regs, vt8623_v_display_regs, vt8623_v_blank_start_regs,
89 	vt8623_v_blank_end_regs, vt8623_v_sync_start_regs, vt8623_v_sync_end_regs,
90 };
91 
92 
93 /* ------------------------------------------------------------------------- */
94 
95 
96 /* Module parameters */
97 
98 static char *mode_option = "640x480-8@60";
99 static int mtrr = 1;
100 
101 MODULE_AUTHOR("(c) 2006 Ondrej Zajicek <santiago@crfreenet.org>");
102 MODULE_LICENSE("GPL");
103 MODULE_DESCRIPTION("fbdev driver for integrated graphics core in VIA VT8623 [CLE266]");
104 
105 module_param(mode_option, charp, 0644);
106 MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
107 module_param_named(mode, mode_option, charp, 0);
108 MODULE_PARM_DESC(mode, "Default video mode e.g. '648x480-8@60' (deprecated)");
109 module_param(mtrr, int, 0444);
110 MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
111 
112 
113 /* ------------------------------------------------------------------------- */
114 
vt8623fb_tilecursor(struct fb_info * info,struct fb_tilecursor * cursor)115 static void vt8623fb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
116 {
117 	struct vt8623fb_info *par = info->par;
118 
119 	svga_tilecursor(par->state.vgabase, info, cursor);
120 }
121 
122 static struct fb_tile_ops vt8623fb_tile_ops = {
123 	.fb_settile	= svga_settile,
124 	.fb_tilecopy	= svga_tilecopy,
125 	.fb_tilefill    = svga_tilefill,
126 	.fb_tileblit    = svga_tileblit,
127 	.fb_tilecursor  = vt8623fb_tilecursor,
128 	.fb_get_tilemax = svga_get_tilemax,
129 };
130 
131 
132 /* ------------------------------------------------------------------------- */
133 
134 
135 /* image data is MSB-first, fb structure is MSB-first too */
expand_color(u32 c)136 static inline u32 expand_color(u32 c)
137 {
138 	return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
139 }
140 
141 /* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
vt8623fb_iplan_imageblit(struct fb_info * info,const struct fb_image * image)142 static void vt8623fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
143 {
144 	u32 fg = expand_color(image->fg_color);
145 	u32 bg = expand_color(image->bg_color);
146 	const u8 *src1, *src;
147 	u8 __iomem *dst1;
148 	u32 __iomem *dst;
149 	u32 val;
150 	int x, y;
151 
152 	src1 = image->data;
153 	dst1 = info->screen_base + (image->dy * info->fix.line_length)
154 		 + ((image->dx / 8) * 4);
155 
156 	for (y = 0; y < image->height; y++) {
157 		src = src1;
158 		dst = (u32 __iomem *) dst1;
159 		for (x = 0; x < image->width; x += 8) {
160 			val = *(src++) * 0x01010101;
161 			val = (val & fg) | (~val & bg);
162 			fb_writel(val, dst++);
163 		}
164 		src1 += image->width / 8;
165 		dst1 += info->fix.line_length;
166 	}
167 }
168 
169 /* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
vt8623fb_iplan_fillrect(struct fb_info * info,const struct fb_fillrect * rect)170 static void vt8623fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
171 {
172 	u32 fg = expand_color(rect->color);
173 	u8 __iomem *dst1;
174 	u32 __iomem *dst;
175 	int x, y;
176 
177 	dst1 = info->screen_base + (rect->dy * info->fix.line_length)
178 		 + ((rect->dx / 8) * 4);
179 
180 	for (y = 0; y < rect->height; y++) {
181 		dst = (u32 __iomem *) dst1;
182 		for (x = 0; x < rect->width; x += 8) {
183 			fb_writel(fg, dst++);
184 		}
185 		dst1 += info->fix.line_length;
186 	}
187 }
188 
189 
190 /* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
expand_pixel(u32 c)191 static inline u32 expand_pixel(u32 c)
192 {
193 	return (((c &  1) << 24) | ((c &  2) << 27) | ((c &  4) << 14) | ((c &   8) << 17) |
194 		((c & 16) <<  4) | ((c & 32) <<  7) | ((c & 64) >>  6) | ((c & 128) >>  3)) * 0xF;
195 }
196 
197 /* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
vt8623fb_cfb4_imageblit(struct fb_info * info,const struct fb_image * image)198 static void vt8623fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
199 {
200 	u32 fg = image->fg_color * 0x11111111;
201 	u32 bg = image->bg_color * 0x11111111;
202 	const u8 *src1, *src;
203 	u8 __iomem *dst1;
204 	u32 __iomem *dst;
205 	u32 val;
206 	int x, y;
207 
208 	src1 = image->data;
209 	dst1 = info->screen_base + (image->dy * info->fix.line_length)
210 		 + ((image->dx / 8) * 4);
211 
212 	for (y = 0; y < image->height; y++) {
213 		src = src1;
214 		dst = (u32 __iomem *) dst1;
215 		for (x = 0; x < image->width; x += 8) {
216 			val = expand_pixel(*(src++));
217 			val = (val & fg) | (~val & bg);
218 			fb_writel(val, dst++);
219 		}
220 		src1 += image->width / 8;
221 		dst1 += info->fix.line_length;
222 	}
223 }
224 
vt8623fb_imageblit(struct fb_info * info,const struct fb_image * image)225 static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image)
226 {
227 	if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
228 	    && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
229 		if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
230 			vt8623fb_iplan_imageblit(info, image);
231 		else
232 			vt8623fb_cfb4_imageblit(info, image);
233 	} else
234 		cfb_imageblit(info, image);
235 }
236 
vt8623fb_fillrect(struct fb_info * info,const struct fb_fillrect * rect)237 static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
238 {
239 	if ((info->var.bits_per_pixel == 4)
240 	    && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
241 	    && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
242 		vt8623fb_iplan_fillrect(info, rect);
243 	 else
244 		cfb_fillrect(info, rect);
245 }
246 
247 
248 /* ------------------------------------------------------------------------- */
249 
250 
vt8623_set_pixclock(struct fb_info * info,u32 pixclock)251 static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
252 {
253 	struct vt8623fb_info *par = info->par;
254 	u16 m, n, r;
255 	u8 regval;
256 	int rv;
257 
258 	rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
259 	if (rv < 0) {
260 		fb_err(info, "cannot set requested pixclock, keeping old value\n");
261 		return;
262 	}
263 
264 	/* Set VGA misc register  */
265 	regval = vga_r(par->state.vgabase, VGA_MIS_R);
266 	vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
267 
268 	/* Set clock registers */
269 	vga_wseq(par->state.vgabase, 0x46, (n  | (r << 6)));
270 	vga_wseq(par->state.vgabase, 0x47, m);
271 
272 	udelay(1000);
273 
274 	/* PLL reset */
275 	svga_wseq_mask(par->state.vgabase, 0x40, 0x02, 0x02);
276 	svga_wseq_mask(par->state.vgabase, 0x40, 0x00, 0x02);
277 }
278 
279 
vt8623fb_open(struct fb_info * info,int user)280 static int vt8623fb_open(struct fb_info *info, int user)
281 {
282 	struct vt8623fb_info *par = info->par;
283 
284 	mutex_lock(&(par->open_lock));
285 	if (par->ref_count == 0) {
286 		void __iomem *vgabase = par->state.vgabase;
287 
288 		memset(&(par->state), 0, sizeof(struct vgastate));
289 		par->state.vgabase = vgabase;
290 		par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
291 		par->state.num_crtc = 0xA2;
292 		par->state.num_seq = 0x50;
293 		save_vga(&(par->state));
294 	}
295 
296 	par->ref_count++;
297 	mutex_unlock(&(par->open_lock));
298 
299 	return 0;
300 }
301 
vt8623fb_release(struct fb_info * info,int user)302 static int vt8623fb_release(struct fb_info *info, int user)
303 {
304 	struct vt8623fb_info *par = info->par;
305 
306 	mutex_lock(&(par->open_lock));
307 	if (par->ref_count == 0) {
308 		mutex_unlock(&(par->open_lock));
309 		return -EINVAL;
310 	}
311 
312 	if (par->ref_count == 1)
313 		restore_vga(&(par->state));
314 
315 	par->ref_count--;
316 	mutex_unlock(&(par->open_lock));
317 
318 	return 0;
319 }
320 
vt8623fb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)321 static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
322 {
323 	int rv, mem, step;
324 
325 	if (!var->pixclock)
326 		return -EINVAL;
327 
328 	/* Find appropriate format */
329 	rv = svga_match_format (vt8623fb_formats, var, NULL);
330 	if (rv < 0)
331 	{
332 		fb_err(info, "unsupported mode requested\n");
333 		return rv;
334 	}
335 
336 	/* Do not allow to have real resoulution larger than virtual */
337 	if (var->xres > var->xres_virtual)
338 		var->xres_virtual = var->xres;
339 
340 	if (var->yres > var->yres_virtual)
341 		var->yres_virtual = var->yres;
342 
343 	/* Round up xres_virtual to have proper alignment of lines */
344 	step = vt8623fb_formats[rv].xresstep - 1;
345 	var->xres_virtual = (var->xres_virtual+step) & ~step;
346 
347 	/* Check whether have enough memory */
348 	mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
349 	if (mem > info->screen_size)
350 	{
351 		fb_err(info, "not enough framebuffer memory (%d kB requested, %d kB available)\n",
352 		       mem >> 10, (unsigned int) (info->screen_size >> 10));
353 		return -EINVAL;
354 	}
355 
356 	/* Text mode is limited to 256 kB of memory */
357 	if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
358 	{
359 		fb_err(info, "text framebuffer size too large (%d kB requested, 256 kB possible)\n",
360 		       mem >> 10);
361 		return -EINVAL;
362 	}
363 
364 	rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
365 	if (rv < 0)
366 	{
367 		fb_err(info, "invalid timings requested\n");
368 		return rv;
369 	}
370 
371 	/* Interlaced mode not supported */
372 	if (var->vmode & FB_VMODE_INTERLACED)
373 		return -EINVAL;
374 
375 	return 0;
376 }
377 
378 
vt8623fb_set_par(struct fb_info * info)379 static int vt8623fb_set_par(struct fb_info *info)
380 {
381 	u32 mode, offset_value, fetch_value, screen_size;
382 	struct vt8623fb_info *par = info->par;
383 	u32 bpp = info->var.bits_per_pixel;
384 
385 	if (bpp != 0) {
386 		info->fix.ypanstep = 1;
387 		info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
388 
389 		info->flags &= ~FBINFO_MISC_TILEBLITTING;
390 		info->tileops = NULL;
391 
392 		/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
393 		info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
394 		info->pixmap.blit_y = ~(u32)0;
395 
396 		offset_value = (info->var.xres_virtual * bpp) / 64;
397 		fetch_value  = ((info->var.xres * bpp) / 128) + 4;
398 
399 		if (bpp == 4)
400 			fetch_value  = (info->var.xres / 8) + 8; /* + 0 is OK */
401 
402 		screen_size  = info->var.yres_virtual * info->fix.line_length;
403 	} else {
404 		info->fix.ypanstep = 16;
405 		info->fix.line_length = 0;
406 
407 		info->flags |= FBINFO_MISC_TILEBLITTING;
408 		info->tileops = &vt8623fb_tile_ops;
409 
410 		/* supports 8x16 tiles only */
411 		info->pixmap.blit_x = 1 << (8 - 1);
412 		info->pixmap.blit_y = 1 << (16 - 1);
413 
414 		offset_value = info->var.xres_virtual / 16;
415 		fetch_value  = (info->var.xres / 8) + 8;
416 		screen_size  = (info->var.xres_virtual * info->var.yres_virtual) / 64;
417 	}
418 
419 	info->var.xoffset = 0;
420 	info->var.yoffset = 0;
421 	info->var.activate = FB_ACTIVATE_NOW;
422 
423 	/* Unlock registers */
424 	svga_wseq_mask(par->state.vgabase, 0x10, 0x01, 0x01);
425 	svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
426 	svga_wcrt_mask(par->state.vgabase, 0x47, 0x00, 0x01);
427 
428 	/* Device, screen and sync off */
429 	svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
430 	svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
431 	svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
432 
433 	/* Set default values */
434 	svga_set_default_gfx_regs(par->state.vgabase);
435 	svga_set_default_atc_regs(par->state.vgabase);
436 	svga_set_default_seq_regs(par->state.vgabase);
437 	svga_set_default_crt_regs(par->state.vgabase);
438 	svga_wcrt_multi(par->state.vgabase, vt8623_line_compare_regs, 0xFFFFFFFF);
439 	svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, 0);
440 
441 	svga_wcrt_multi(par->state.vgabase, vt8623_offset_regs, offset_value);
442 	svga_wseq_multi(par->state.vgabase, vt8623_fetch_count_regs, fetch_value);
443 
444 	/* Clear H/V Skew */
445 	svga_wcrt_mask(par->state.vgabase, 0x03, 0x00, 0x60);
446 	svga_wcrt_mask(par->state.vgabase, 0x05, 0x00, 0x60);
447 
448 	if (info->var.vmode & FB_VMODE_DOUBLE)
449 		svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80);
450 	else
451 		svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80);
452 
453 	svga_wseq_mask(par->state.vgabase, 0x1E, 0xF0, 0xF0); // DI/DVP bus
454 	svga_wseq_mask(par->state.vgabase, 0x2A, 0x0F, 0x0F); // DI/DVP bus
455 	svga_wseq_mask(par->state.vgabase, 0x16, 0x08, 0xBF); // FIFO read threshold
456 	vga_wseq(par->state.vgabase, 0x17, 0x1F);       // FIFO depth
457 	vga_wseq(par->state.vgabase, 0x18, 0x4E);
458 	svga_wseq_mask(par->state.vgabase, 0x1A, 0x08, 0x08); // enable MMIO ?
459 
460 	vga_wcrt(par->state.vgabase, 0x32, 0x00);
461 	vga_wcrt(par->state.vgabase, 0x34, 0x00);
462 	vga_wcrt(par->state.vgabase, 0x6A, 0x80);
463 	vga_wcrt(par->state.vgabase, 0x6A, 0xC0);
464 
465 	vga_wgfx(par->state.vgabase, 0x20, 0x00);
466 	vga_wgfx(par->state.vgabase, 0x21, 0x00);
467 	vga_wgfx(par->state.vgabase, 0x22, 0x00);
468 
469 	/* Set SR15 according to number of bits per pixel */
470 	mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
471 	switch (mode) {
472 	case 0:
473 		fb_dbg(info, "text mode\n");
474 		svga_set_textmode_vga_regs(par->state.vgabase);
475 		svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
476 		svga_wcrt_mask(par->state.vgabase, 0x11, 0x60, 0x70);
477 		break;
478 	case 1:
479 		fb_dbg(info, "4 bit pseudocolor\n");
480 		vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
481 		svga_wseq_mask(par->state.vgabase, 0x15, 0x20, 0xFE);
482 		svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
483 		break;
484 	case 2:
485 		fb_dbg(info, "4 bit pseudocolor, planar\n");
486 		svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
487 		svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
488 		break;
489 	case 3:
490 		fb_dbg(info, "8 bit pseudocolor\n");
491 		svga_wseq_mask(par->state.vgabase, 0x15, 0x22, 0xFE);
492 		break;
493 	case 4:
494 		fb_dbg(info, "5/6/5 truecolor\n");
495 		svga_wseq_mask(par->state.vgabase, 0x15, 0xB6, 0xFE);
496 		break;
497 	case 5:
498 		fb_dbg(info, "8/8/8 truecolor\n");
499 		svga_wseq_mask(par->state.vgabase, 0x15, 0xAE, 0xFE);
500 		break;
501 	default:
502 		printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
503 		return (-EINVAL);
504 	}
505 
506 	vt8623_set_pixclock(info, info->var.pixclock);
507 	svga_set_timings(par->state.vgabase, &vt8623_timing_regs, &(info->var), 1, 1,
508 			 (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
509 			 1, info->node);
510 
511 	if (screen_size > info->screen_size)
512 		screen_size = info->screen_size;
513 	memset_io(info->screen_base, 0x00, screen_size);
514 
515 	/* Device and screen back on */
516 	svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
517 	svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
518 	svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
519 
520 	return 0;
521 }
522 
523 
vt8623fb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * fb)524 static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
525 				u_int transp, struct fb_info *fb)
526 {
527 	switch (fb->var.bits_per_pixel) {
528 	case 0:
529 	case 4:
530 		if (regno >= 16)
531 			return -EINVAL;
532 
533 		outb(0x0F, VGA_PEL_MSK);
534 		outb(regno, VGA_PEL_IW);
535 		outb(red >> 10, VGA_PEL_D);
536 		outb(green >> 10, VGA_PEL_D);
537 		outb(blue >> 10, VGA_PEL_D);
538 		break;
539 	case 8:
540 		if (regno >= 256)
541 			return -EINVAL;
542 
543 		outb(0xFF, VGA_PEL_MSK);
544 		outb(regno, VGA_PEL_IW);
545 		outb(red >> 10, VGA_PEL_D);
546 		outb(green >> 10, VGA_PEL_D);
547 		outb(blue >> 10, VGA_PEL_D);
548 		break;
549 	case 16:
550 		if (regno >= 16)
551 			return 0;
552 
553 		if (fb->var.green.length == 5)
554 			((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
555 				((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
556 		else if (fb->var.green.length == 6)
557 			((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
558 				((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
559 		else
560 			return -EINVAL;
561 		break;
562 	case 24:
563 	case 32:
564 		if (regno >= 16)
565 			return 0;
566 
567 		/* ((transp & 0xFF00) << 16) */
568 		((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
569 			(green & 0xFF00) | ((blue & 0xFF00) >> 8);
570 		break;
571 	default:
572 		return -EINVAL;
573 	}
574 
575 	return 0;
576 }
577 
578 
vt8623fb_blank(int blank_mode,struct fb_info * info)579 static int vt8623fb_blank(int blank_mode, struct fb_info *info)
580 {
581 	struct vt8623fb_info *par = info->par;
582 
583 	switch (blank_mode) {
584 	case FB_BLANK_UNBLANK:
585 		fb_dbg(info, "unblank\n");
586 		svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
587 		svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
588 		break;
589 	case FB_BLANK_NORMAL:
590 		fb_dbg(info, "blank\n");
591 		svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
592 		svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
593 		break;
594 	case FB_BLANK_HSYNC_SUSPEND:
595 		fb_dbg(info, "DPMS standby (hsync off)\n");
596 		svga_wcrt_mask(par->state.vgabase, 0x36, 0x10, 0x30);
597 		svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
598 		break;
599 	case FB_BLANK_VSYNC_SUSPEND:
600 		fb_dbg(info, "DPMS suspend (vsync off)\n");
601 		svga_wcrt_mask(par->state.vgabase, 0x36, 0x20, 0x30);
602 		svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
603 		break;
604 	case FB_BLANK_POWERDOWN:
605 		fb_dbg(info, "DPMS off (no sync)\n");
606 		svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
607 		svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
608 		break;
609 	}
610 
611 	return 0;
612 }
613 
614 
vt8623fb_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)615 static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
616 {
617 	struct vt8623fb_info *par = info->par;
618 	unsigned int offset;
619 
620 	/* Calculate the offset */
621 	if (info->var.bits_per_pixel == 0) {
622 		offset = (var->yoffset / 16) * info->var.xres_virtual
623 		       + var->xoffset;
624 		offset = offset >> 3;
625 	} else {
626 		offset = (var->yoffset * info->fix.line_length) +
627 			 (var->xoffset * info->var.bits_per_pixel / 8);
628 		offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 1);
629 	}
630 
631 	/* Set the offset */
632 	svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, offset);
633 
634 	return 0;
635 }
636 
637 
638 /* ------------------------------------------------------------------------- */
639 
640 
641 /* Frame buffer operations */
642 
643 static const struct fb_ops vt8623fb_ops = {
644 	.owner		= THIS_MODULE,
645 	.fb_open	= vt8623fb_open,
646 	.fb_release	= vt8623fb_release,
647 	.fb_check_var	= vt8623fb_check_var,
648 	.fb_set_par	= vt8623fb_set_par,
649 	.fb_setcolreg	= vt8623fb_setcolreg,
650 	.fb_blank	= vt8623fb_blank,
651 	.fb_pan_display	= vt8623fb_pan_display,
652 	.fb_fillrect	= vt8623fb_fillrect,
653 	.fb_copyarea	= cfb_copyarea,
654 	.fb_imageblit	= vt8623fb_imageblit,
655 	.fb_get_caps    = svga_get_caps,
656 };
657 
658 
659 /* PCI probe */
660 
vt8623_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)661 static int vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
662 {
663 	struct pci_bus_region bus_reg;
664 	struct resource vga_res;
665 	struct fb_info *info;
666 	struct vt8623fb_info *par;
667 	unsigned int memsize1, memsize2;
668 	int rc;
669 
670 	/* Ignore secondary VGA device because there is no VGA arbitration */
671 	if (! svga_primary_device(dev)) {
672 		dev_info(&(dev->dev), "ignoring secondary device\n");
673 		return -ENODEV;
674 	}
675 
676 	rc = aperture_remove_conflicting_pci_devices(dev, "vt8623fb");
677 	if (rc)
678 		return rc;
679 
680 	/* Allocate and fill driver data structure */
681 	info = framebuffer_alloc(sizeof(struct vt8623fb_info), &(dev->dev));
682 	if (!info)
683 		return -ENOMEM;
684 
685 	par = info->par;
686 	mutex_init(&par->open_lock);
687 
688 	info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
689 	info->fbops = &vt8623fb_ops;
690 
691 	/* Prepare PCI device */
692 
693 	rc = pci_enable_device(dev);
694 	if (rc < 0) {
695 		dev_err(info->device, "cannot enable PCI device\n");
696 		goto err_enable_device;
697 	}
698 
699 	rc = pci_request_regions(dev, "vt8623fb");
700 	if (rc < 0) {
701 		dev_err(info->device, "cannot reserve framebuffer region\n");
702 		goto err_request_regions;
703 	}
704 
705 	info->fix.smem_start = pci_resource_start(dev, 0);
706 	info->fix.smem_len = pci_resource_len(dev, 0);
707 	info->fix.mmio_start = pci_resource_start(dev, 1);
708 	info->fix.mmio_len = pci_resource_len(dev, 1);
709 
710 	/* Map physical IO memory address into kernel space */
711 	info->screen_base = pci_iomap_wc(dev, 0, 0);
712 	if (! info->screen_base) {
713 		rc = -ENOMEM;
714 		dev_err(info->device, "iomap for framebuffer failed\n");
715 		goto err_iomap_1;
716 	}
717 
718 	par->mmio_base = pci_iomap(dev, 1, 0);
719 	if (! par->mmio_base) {
720 		rc = -ENOMEM;
721 		dev_err(info->device, "iomap for MMIO failed\n");
722 		goto err_iomap_2;
723 	}
724 
725 	bus_reg.start = 0;
726 	bus_reg.end = 64 * 1024;
727 
728 	vga_res.flags = IORESOURCE_IO;
729 
730 	pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
731 
732 	par->state.vgabase = (void __iomem *) (unsigned long) vga_res.start;
733 
734 	/* Find how many physical memory there is on card */
735 	memsize1 = (vga_rseq(par->state.vgabase, 0x34) + 1) >> 1;
736 	memsize2 = vga_rseq(par->state.vgabase, 0x39) << 2;
737 
738 	if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2))
739 		info->screen_size = memsize1 << 20;
740 	else {
741 		dev_err(info->device, "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2);
742 		info->screen_size = 16 << 20;
743 	}
744 
745 	info->fix.smem_len = info->screen_size;
746 	strcpy(info->fix.id, "VIA VT8623");
747 	info->fix.type = FB_TYPE_PACKED_PIXELS;
748 	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
749 	info->fix.ypanstep = 0;
750 	info->fix.accel = FB_ACCEL_NONE;
751 	info->pseudo_palette = (void*)par->pseudo_palette;
752 
753 	/* Prepare startup mode */
754 
755 	kernel_param_lock(THIS_MODULE);
756 	rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
757 	kernel_param_unlock(THIS_MODULE);
758 	if (! ((rc == 1) || (rc == 2))) {
759 		rc = -EINVAL;
760 		dev_err(info->device, "mode %s not found\n", mode_option);
761 		goto err_find_mode;
762 	}
763 
764 	rc = fb_alloc_cmap(&info->cmap, 256, 0);
765 	if (rc < 0) {
766 		dev_err(info->device, "cannot allocate colormap\n");
767 		goto err_alloc_cmap;
768 	}
769 
770 	rc = register_framebuffer(info);
771 	if (rc < 0) {
772 		dev_err(info->device, "cannot register framebuffer\n");
773 		goto err_reg_fb;
774 	}
775 
776 	fb_info(info, "%s on %s, %d MB RAM\n",
777 		info->fix.id, pci_name(dev), info->fix.smem_len >> 20);
778 
779 	/* Record a reference to the driver data */
780 	pci_set_drvdata(dev, info);
781 
782 	if (mtrr)
783 		par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
784 						  info->fix.smem_len);
785 
786 	return 0;
787 
788 	/* Error handling */
789 err_reg_fb:
790 	fb_dealloc_cmap(&info->cmap);
791 err_alloc_cmap:
792 err_find_mode:
793 	pci_iounmap(dev, par->mmio_base);
794 err_iomap_2:
795 	pci_iounmap(dev, info->screen_base);
796 err_iomap_1:
797 	pci_release_regions(dev);
798 err_request_regions:
799 /*	pci_disable_device(dev); */
800 err_enable_device:
801 	framebuffer_release(info);
802 	return rc;
803 }
804 
805 /* PCI remove */
806 
vt8623_pci_remove(struct pci_dev * dev)807 static void vt8623_pci_remove(struct pci_dev *dev)
808 {
809 	struct fb_info *info = pci_get_drvdata(dev);
810 
811 	if (info) {
812 		struct vt8623fb_info *par = info->par;
813 
814 		arch_phys_wc_del(par->wc_cookie);
815 		unregister_framebuffer(info);
816 		fb_dealloc_cmap(&info->cmap);
817 
818 		pci_iounmap(dev, info->screen_base);
819 		pci_iounmap(dev, par->mmio_base);
820 		pci_release_regions(dev);
821 /*		pci_disable_device(dev); */
822 
823 		framebuffer_release(info);
824 	}
825 }
826 
827 
828 /* PCI suspend */
829 
vt8623_pci_suspend(struct device * dev)830 static int __maybe_unused vt8623_pci_suspend(struct device *dev)
831 {
832 	struct fb_info *info = dev_get_drvdata(dev);
833 	struct vt8623fb_info *par = info->par;
834 
835 	dev_info(info->device, "suspend\n");
836 
837 	console_lock();
838 	mutex_lock(&(par->open_lock));
839 
840 	if (par->ref_count == 0) {
841 		mutex_unlock(&(par->open_lock));
842 		console_unlock();
843 		return 0;
844 	}
845 
846 	fb_set_suspend(info, 1);
847 
848 	mutex_unlock(&(par->open_lock));
849 	console_unlock();
850 
851 	return 0;
852 }
853 
854 
855 /* PCI resume */
856 
vt8623_pci_resume(struct device * dev)857 static int __maybe_unused vt8623_pci_resume(struct device *dev)
858 {
859 	struct fb_info *info = dev_get_drvdata(dev);
860 	struct vt8623fb_info *par = info->par;
861 
862 	dev_info(info->device, "resume\n");
863 
864 	console_lock();
865 	mutex_lock(&(par->open_lock));
866 
867 	if (par->ref_count == 0)
868 		goto fail;
869 
870 	vt8623fb_set_par(info);
871 	fb_set_suspend(info, 0);
872 
873 fail:
874 	mutex_unlock(&(par->open_lock));
875 	console_unlock();
876 
877 	return 0;
878 }
879 
880 static const struct dev_pm_ops vt8623_pci_pm_ops = {
881 #ifdef CONFIG_PM_SLEEP
882 	.suspend	= vt8623_pci_suspend,
883 	.resume		= vt8623_pci_resume,
884 	.freeze		= NULL,
885 	.thaw		= vt8623_pci_resume,
886 	.poweroff	= vt8623_pci_suspend,
887 	.restore	= vt8623_pci_resume,
888 #endif /* CONFIG_PM_SLEEP */
889 };
890 
891 /* List of boards that we are trying to support */
892 
893 static const struct pci_device_id vt8623_devices[] = {
894 	{PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
895 	{0, 0, 0, 0, 0, 0, 0}
896 };
897 
898 MODULE_DEVICE_TABLE(pci, vt8623_devices);
899 
900 static struct pci_driver vt8623fb_pci_driver = {
901 	.name		= "vt8623fb",
902 	.id_table	= vt8623_devices,
903 	.probe		= vt8623_pci_probe,
904 	.remove		= vt8623_pci_remove,
905 	.driver.pm	= &vt8623_pci_pm_ops,
906 };
907 
908 /* Cleanup */
909 
vt8623fb_cleanup(void)910 static void __exit vt8623fb_cleanup(void)
911 {
912 	pr_debug("vt8623fb: cleaning up\n");
913 	pci_unregister_driver(&vt8623fb_pci_driver);
914 }
915 
916 /* Driver Initialisation */
917 
vt8623fb_init(void)918 static int __init vt8623fb_init(void)
919 {
920 
921 #ifndef MODULE
922 	char *option = NULL;
923 #endif
924 
925 	if (fb_modesetting_disabled("vt8623fb"))
926 		return -ENODEV;
927 
928 #ifndef MODULE
929 	if (fb_get_options("vt8623fb", &option))
930 		return -ENODEV;
931 
932 	if (option && *option)
933 		mode_option = option;
934 #endif
935 
936 	pr_debug("vt8623fb: initializing\n");
937 	return pci_register_driver(&vt8623fb_pci_driver);
938 }
939 
940 /* ------------------------------------------------------------------------- */
941 
942 /* Modularization */
943 
944 module_init(vt8623fb_init);
945 module_exit(vt8623fb_cleanup);
946