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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / video / vt8623fb.c
blob4e74d262cf3e9f338c1eb0cb46a5835794a532d3
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/module.h>
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/string.h>
19 #include <linux/mm.h>
20 #include <linux/tty.h>
21 #include <linux/delay.h>
22 #include <linux/fb.h>
23 #include <linux/svga.h>
24 #include <linux/init.h>
25 #include <linux/pci.h>
26 #include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */
27 #include <video/vga.h>
28
29 #ifdef CONFIG_MTRR
30 #include <asm/mtrr.h>
31 #endif
32
33 struct vt8623fb_info {
34 char __iomem *mmio_base;
35 int mtrr_reg;
36 struct vgastate state;
37 struct mutex open_lock;
38 unsigned int ref_count;
39 u32 pseudo_palette[16];
40 };
41
42
43
44 /* ------------------------------------------------------------------------- */
45
46 static const struct svga_fb_format vt8623fb_formats[] = {
47 { 0, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
48 FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP8, FB_VISUAL_PSEUDOCOLOR, 16, 16},
49 { 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
50 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 16, 16},
51 { 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 1,
52 FB_TYPE_INTERLEAVED_PLANES, 1, FB_VISUAL_PSEUDOCOLOR, 16, 16},
53 { 8, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
54 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 8, 8},
55 /* {16, {10, 5, 0}, {5, 5, 0}, {0, 5, 0}, {0, 0, 0}, 0,
56 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 4, 4}, */
57 {16, {11, 5, 0}, {5, 6, 0}, {0, 5, 0}, {0, 0, 0}, 0,
58 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 4, 4},
59 {32, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
60 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 2, 2},
61 SVGA_FORMAT_END
62 };
63
64 static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3,
65 60000, 300000, 14318};
66
67 /* CRT timing register sets */
68
69 static struct vga_regset vt8623_h_total_regs[] = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END};
70 static struct vga_regset vt8623_h_display_regs[] = {{0x01, 0, 7}, VGA_REGSET_END};
71 static struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END};
72 static struct vga_regset vt8623_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END};
73 static struct vga_regset vt8623_h_sync_start_regs[] = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END};
74 static struct vga_regset vt8623_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END};
75
76 static struct vga_regset vt8623_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END};
77 static struct vga_regset vt8623_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END};
78 static struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END};
79 static struct vga_regset vt8623_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END};
80 static struct vga_regset vt8623_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END};
81 static struct vga_regset vt8623_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END};
82
83 static struct vga_regset vt8623_offset_regs[] = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END};
84 static 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};
85 static struct vga_regset vt8623_fetch_count_regs[] = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END};
86 static struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END};
87
88 static struct svga_timing_regs vt8623_timing_regs = {
89 vt8623_h_total_regs, vt8623_h_display_regs, vt8623_h_blank_start_regs,
90 vt8623_h_blank_end_regs, vt8623_h_sync_start_regs, vt8623_h_sync_end_regs,
91 vt8623_v_total_regs, vt8623_v_display_regs, vt8623_v_blank_start_regs,
92 vt8623_v_blank_end_regs, vt8623_v_sync_start_regs, vt8623_v_sync_end_regs,
93 };
94
95
96 /* ------------------------------------------------------------------------- */
97
98
99 /* Module parameters */
100
101 static char *mode_option = "640x480-8@60";
102
103 #ifdef CONFIG_MTRR
104 static int mtrr = 1;
105 #endif
106
107 MODULE_AUTHOR("(c) 2006 Ondrej Zajicek <santiago@crfreenet.org>");
108 MODULE_LICENSE("GPL");
109 MODULE_DESCRIPTION("fbdev driver for integrated graphics core in VIA VT8623 [CLE266]");
110
111 module_param(mode_option, charp, 0644);
112 MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
113 module_param_named(mode, mode_option, charp, 0);
114 MODULE_PARM_DESC(mode, "Default video mode e.g. '648x480-8@60' (deprecated)");
115
116 #ifdef CONFIG_MTRR
117 module_param(mtrr, int, 0444);
118 MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
119 #endif
120
121
122 /* ------------------------------------------------------------------------- */
123
124 static void vt8623fb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
125 {
126 struct vt8623fb_info *par = info->par;
127
128 svga_tilecursor(par->state.vgabase, info, cursor);
129 }
130
131 static struct fb_tile_ops vt8623fb_tile_ops = {
132 .fb_settile = svga_settile,
133 .fb_tilecopy = svga_tilecopy,
134 .fb_tilefill = svga_tilefill,
135 .fb_tileblit = svga_tileblit,
136 .fb_tilecursor = vt8623fb_tilecursor,
137 .fb_get_tilemax = svga_get_tilemax,
138 };
139
140
141 /* ------------------------------------------------------------------------- */
142
143
144 /* image data is MSB-first, fb structure is MSB-first too */
145 static inline u32 expand_color(u32 c)
146 {
147 return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
148 }
149
150 /* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
151 static void vt8623fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
152 {
153 u32 fg = expand_color(image->fg_color);
154 u32 bg = expand_color(image->bg_color);
155 const u8 *src1, *src;
156 u8 __iomem *dst1;
157 u32 __iomem *dst;
158 u32 val;
159 int x, y;
160
161 src1 = image->data;
162 dst1 = info->screen_base + (image->dy * info->fix.line_length)
163 + ((image->dx / 8) * 4);
164
165 for (y = 0; y < image->height; y++) {
166 src = src1;
167 dst = (u32 __iomem *) dst1;
168 for (x = 0; x < image->width; x += 8) {
169 val = *(src++) * 0x01010101;
170 val = (val & fg) | (~val & bg);
171 fb_writel(val, dst++);
172 }
173 src1 += image->width / 8;
174 dst1 += info->fix.line_length;
175 }
176 }
177
178 /* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
179 static void vt8623fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
180 {
181 u32 fg = expand_color(rect->color);
182 u8 __iomem *dst1;
183 u32 __iomem *dst;
184 int x, y;
185
186 dst1 = info->screen_base + (rect->dy * info->fix.line_length)
187 + ((rect->dx / 8) * 4);
188
189 for (y = 0; y < rect->height; y++) {
190 dst = (u32 __iomem *) dst1;
191 for (x = 0; x < rect->width; x += 8) {
192 fb_writel(fg, dst++);
193 }
194 dst1 += info->fix.line_length;
195 }
196 }
197
198
199 /* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
200 static inline u32 expand_pixel(u32 c)
201 {
202 return (((c & 1) << 24) | ((c & 2) << 27) | ((c & 4) << 14) | ((c & 8) << 17) |
203 ((c & 16) << 4) | ((c & 32) << 7) | ((c & 64) >> 6) | ((c & 128) >> 3)) * 0xF;
204 }
205
206 /* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
207 static void vt8623fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
208 {
209 u32 fg = image->fg_color * 0x11111111;
210 u32 bg = image->bg_color * 0x11111111;
211 const u8 *src1, *src;
212 u8 __iomem *dst1;
213 u32 __iomem *dst;
214 u32 val;
215 int x, y;
216
217 src1 = image->data;
218 dst1 = info->screen_base + (image->dy * info->fix.line_length)
219 + ((image->dx / 8) * 4);
220
221 for (y = 0; y < image->height; y++) {
222 src = src1;
223 dst = (u32 __iomem *) dst1;
224 for (x = 0; x < image->width; x += 8) {
225 val = expand_pixel(*(src++));
226 val = (val & fg) | (~val & bg);
227 fb_writel(val, dst++);
228 }
229 src1 += image->width / 8;
230 dst1 += info->fix.line_length;
231 }
232 }
233
234 static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image)
235 {
236 if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
237 && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
238 if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
239 vt8623fb_iplan_imageblit(info, image);
240 else
241 vt8623fb_cfb4_imageblit(info, image);
242 } else
243 cfb_imageblit(info, image);
244 }
245
246 static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
247 {
248 if ((info->var.bits_per_pixel == 4)
249 && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
250 && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
251 vt8623fb_iplan_fillrect(info, rect);
252 else
253 cfb_fillrect(info, rect);
254 }
255
256
257 /* ------------------------------------------------------------------------- */
258
259
260 static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
261 {
262 struct vt8623fb_info *par = info->par;
263 u16 m, n, r;
264 u8 regval;
265 int rv;
266
267 rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
268 if (rv < 0) {
269 printk(KERN_ERR "fb%d: cannot set requested pixclock, keeping old value\n", info->node);
270 return;
271 }
272
273 /* Set VGA misc register */
274 regval = vga_r(par->state.vgabase, VGA_MIS_R);
275 vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
276
277 /* Set clock registers */
278 vga_wseq(par->state.vgabase, 0x46, (n | (r << 6)));
279 vga_wseq(par->state.vgabase, 0x47, m);
280
281 udelay(1000);
282
283 /* PLL reset */
284 svga_wseq_mask(par->state.vgabase, 0x40, 0x02, 0x02);
285 svga_wseq_mask(par->state.vgabase, 0x40, 0x00, 0x02);
286 }
287
288
289 static int vt8623fb_open(struct fb_info *info, int user)
290 {
291 struct vt8623fb_info *par = info->par;
292
293 mutex_lock(&(par->open_lock));
294 if (par->ref_count == 0) {
295 void __iomem *vgabase = par->state.vgabase;
296
297 memset(&(par->state), 0, sizeof(struct vgastate));
298 par->state.vgabase = vgabase;
299 par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
300 par->state.num_crtc = 0xA2;
301 par->state.num_seq = 0x50;
302 save_vga(&(par->state));
303 }
304
305 par->ref_count++;
306 mutex_unlock(&(par->open_lock));
307
308 return 0;
309 }
310
311 static int vt8623fb_release(struct fb_info *info, int user)
312 {
313 struct vt8623fb_info *par = info->par;
314
315 mutex_lock(&(par->open_lock));
316 if (par->ref_count == 0) {
317 mutex_unlock(&(par->open_lock));
318 return -EINVAL;
319 }
320
321 if (par->ref_count == 1)
322 restore_vga(&(par->state));
323
324 par->ref_count--;
325 mutex_unlock(&(par->open_lock));
326
327 return 0;
328 }
329
330 static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
331 {
332 int rv, mem, step;
333
334 /* Find appropriate format */
335 rv = svga_match_format (vt8623fb_formats, var, NULL);
336 if (rv < 0)
337 {
338 printk(KERN_ERR "fb%d: unsupported mode requested\n", info->node);
339 return rv;
340 }
341
342 /* Do not allow to have real resoulution larger than virtual */
343 if (var->xres > var->xres_virtual)
344 var->xres_virtual = var->xres;
345
346 if (var->yres > var->yres_virtual)
347 var->yres_virtual = var->yres;
348
349 /* Round up xres_virtual to have proper alignment of lines */
350 step = vt8623fb_formats[rv].xresstep - 1;
351 var->xres_virtual = (var->xres_virtual+step) & ~step;
352
353 /* Check whether have enough memory */
354 mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
355 if (mem > info->screen_size)
356 {
357 printk(KERN_ERR "fb%d: not enough framebuffer memory (%d kB requested , %d kB available)\n", info->node, mem >> 10, (unsigned int) (info->screen_size >> 10));
358 return -EINVAL;
359 }
360
361 /* Text mode is limited to 256 kB of memory */
362 if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
363 {
364 printk(KERN_ERR "fb%d: text framebuffer size too large (%d kB requested, 256 kB possible)\n", info->node, mem >> 10);
365 return -EINVAL;
366 }
367
368 rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
369 if (rv < 0)
370 {
371 printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
372 return rv;
373 }
374
375 /* Interlaced mode not supported */
376 if (var->vmode & FB_VMODE_INTERLACED)
377 return -EINVAL;
378
379 return 0;
380 }
381
382
383 static int vt8623fb_set_par(struct fb_info *info)
384 {
385 u32 mode, offset_value, fetch_value, screen_size;
386 struct vt8623fb_info *par = info->par;
387 u32 bpp = info->var.bits_per_pixel;
388
389 if (bpp != 0) {
390 info->fix.ypanstep = 1;
391 info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
392
393 info->flags &= ~FBINFO_MISC_TILEBLITTING;
394 info->tileops = NULL;
395
396 /* in 4bpp supports 8p wide tiles only, any tiles otherwise */
397 info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
398 info->pixmap.blit_y = ~(u32)0;
399
400 offset_value = (info->var.xres_virtual * bpp) / 64;
401 fetch_value = ((info->var.xres * bpp) / 128) + 4;
402
403 if (bpp == 4)
404 fetch_value = (info->var.xres / 8) + 8; /* + 0 is OK */
405
406 screen_size = info->var.yres_virtual * info->fix.line_length;
407 } else {
408 info->fix.ypanstep = 16;
409 info->fix.line_length = 0;
410
411 info->flags |= FBINFO_MISC_TILEBLITTING;
412 info->tileops = &vt8623fb_tile_ops;
413
414 /* supports 8x16 tiles only */
415 info->pixmap.blit_x = 1 << (8 - 1);
416 info->pixmap.blit_y = 1 << (16 - 1);
417
418 offset_value = info->var.xres_virtual / 16;
419 fetch_value = (info->var.xres / 8) + 8;
420 screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
421 }
422
423 info->var.xoffset = 0;
424 info->var.yoffset = 0;
425 info->var.activate = FB_ACTIVATE_NOW;
426
427 /* Unlock registers */
428 svga_wseq_mask(par->state.vgabase, 0x10, 0x01, 0x01);
429 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
430 svga_wcrt_mask(par->state.vgabase, 0x47, 0x00, 0x01);
431
432 /* Device, screen and sync off */
433 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
434 svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
435 svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
436
437 /* Set default values */
438 svga_set_default_gfx_regs(par->state.vgabase);
439 svga_set_default_atc_regs(par->state.vgabase);
440 svga_set_default_seq_regs(par->state.vgabase);
441 svga_set_default_crt_regs(par->state.vgabase);
442 svga_wcrt_multi(par->state.vgabase, vt8623_line_compare_regs, 0xFFFFFFFF);
443 svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, 0);
444
445 svga_wcrt_multi(par->state.vgabase, vt8623_offset_regs, offset_value);
446 svga_wseq_multi(par->state.vgabase, vt8623_fetch_count_regs, fetch_value);
447
448 /* Clear H/V Skew */
449 svga_wcrt_mask(par->state.vgabase, 0x03, 0x00, 0x60);
450 svga_wcrt_mask(par->state.vgabase, 0x05, 0x00, 0x60);
451
452 if (info->var.vmode & FB_VMODE_DOUBLE)
453 svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80);
454 else
455 svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80);
456
457 svga_wseq_mask(par->state.vgabase, 0x1E, 0xF0, 0xF0); // DI/DVP bus
458 svga_wseq_mask(par->state.vgabase, 0x2A, 0x0F, 0x0F); // DI/DVP bus
459 svga_wseq_mask(par->state.vgabase, 0x16, 0x08, 0xBF); // FIFO read threshold
460 vga_wseq(par->state.vgabase, 0x17, 0x1F); // FIFO depth
461 vga_wseq(par->state.vgabase, 0x18, 0x4E);
462 svga_wseq_mask(par->state.vgabase, 0x1A, 0x08, 0x08); // enable MMIO ?
463
464 vga_wcrt(par->state.vgabase, 0x32, 0x00);
465 vga_wcrt(par->state.vgabase, 0x34, 0x00);
466 vga_wcrt(par->state.vgabase, 0x6A, 0x80);
467 vga_wcrt(par->state.vgabase, 0x6A, 0xC0);
468
469 vga_wgfx(par->state.vgabase, 0x20, 0x00);
470 vga_wgfx(par->state.vgabase, 0x21, 0x00);
471 vga_wgfx(par->state.vgabase, 0x22, 0x00);
472
473 /* Set SR15 according to number of bits per pixel */
474 mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
475 switch (mode) {
476 case 0:
477 pr_debug("fb%d: text mode\n", info->node);
478 svga_set_textmode_vga_regs(par->state.vgabase);
479 svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
480 svga_wcrt_mask(par->state.vgabase, 0x11, 0x60, 0x70);
481 break;
482 case 1:
483 pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
484 vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
485 svga_wseq_mask(par->state.vgabase, 0x15, 0x20, 0xFE);
486 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
487 break;
488 case 2:
489 pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
490 svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
491 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
492 break;
493 case 3:
494 pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
495 svga_wseq_mask(par->state.vgabase, 0x15, 0x22, 0xFE);
496 break;
497 case 4:
498 pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
499 svga_wseq_mask(par->state.vgabase, 0x15, 0xB6, 0xFE);
500 break;
501 case 5:
502 pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
503 svga_wseq_mask(par->state.vgabase, 0x15, 0xAE, 0xFE);
504 break;
505 default:
506 printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
507 return (-EINVAL);
508 }
509
510 vt8623_set_pixclock(info, info->var.pixclock);
511 svga_set_timings(par->state.vgabase, &vt8623_timing_regs, &(info->var), 1, 1,
512 (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
513 1, info->node);
514
515 memset_io(info->screen_base, 0x00, screen_size);
516
517 /* Device and screen back on */
518 svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
519 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
520 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
521
522 return 0;
523 }
524
525
526 static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
527 u_int transp, struct fb_info *fb)
528 {
529 switch (fb->var.bits_per_pixel) {
530 case 0:
531 case 4:
532 if (regno >= 16)
533 return -EINVAL;
534
535 outb(0x0F, VGA_PEL_MSK);
536 outb(regno, VGA_PEL_IW);
537 outb(red >> 10, VGA_PEL_D);
538 outb(green >> 10, VGA_PEL_D);
539 outb(blue >> 10, VGA_PEL_D);
540 break;
541 case 8:
542 if (regno >= 256)
543 return -EINVAL;
544
545 outb(0xFF, VGA_PEL_MSK);
546 outb(regno, VGA_PEL_IW);
547 outb(red >> 10, VGA_PEL_D);
548 outb(green >> 10, VGA_PEL_D);
549 outb(blue >> 10, VGA_PEL_D);
550 break;
551 case 16:
552 if (regno >= 16)
553 return 0;
554
555 if (fb->var.green.length == 5)
556 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
557 ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
558 else if (fb->var.green.length == 6)
559 ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
560 ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
561 else
562 return -EINVAL;
563 break;
564 case 24:
565 case 32:
566 if (regno >= 16)
567 return 0;
568
569 /* ((transp & 0xFF00) << 16) */
570 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
571 (green & 0xFF00) | ((blue & 0xFF00) >> 8);
572 break;
573 default:
574 return -EINVAL;
575 }
576
577 return 0;
578 }
579
580
581 static int vt8623fb_blank(int blank_mode, struct fb_info *info)
582 {
583 struct vt8623fb_info *par = info->par;
584
585 switch (blank_mode) {
586 case FB_BLANK_UNBLANK:
587 pr_debug("fb%d: unblank\n", info->node);
588 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
589 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
590 break;
591 case FB_BLANK_NORMAL:
592 pr_debug("fb%d: blank\n", info->node);
593 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
594 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
595 break;
596 case FB_BLANK_HSYNC_SUSPEND:
597 pr_debug("fb%d: DPMS standby (hsync off)\n", info->node);
598 svga_wcrt_mask(par->state.vgabase, 0x36, 0x10, 0x30);
599 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
600 break;
601 case FB_BLANK_VSYNC_SUSPEND:
602 pr_debug("fb%d: DPMS suspend (vsync off)\n", info->node);
603 svga_wcrt_mask(par->state.vgabase, 0x36, 0x20, 0x30);
604 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
605 break;
606 case FB_BLANK_POWERDOWN:
607 pr_debug("fb%d: DPMS off (no sync)\n", info->node);
608 svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
609 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
610 break;
611 }
612
613 return 0;
614 }
615
616
617 static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
618 {
619 struct vt8623fb_info *par = info->par;
620 unsigned int offset;
621
622 /* Calculate the offset */
623 if (info->var.bits_per_pixel == 0) {
624 offset = (var->yoffset / 16) * info->var.xres_virtual
625 + var->xoffset;
626 offset = offset >> 3;
627 } else {
628 offset = (var->yoffset * info->fix.line_length) +
629 (var->xoffset * info->var.bits_per_pixel / 8);
630 offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 1);
631 }
632
633 /* Set the offset */
634 svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, offset);
635
636 return 0;
637 }
638
639
640 /* ------------------------------------------------------------------------- */
641
642
643 /* Frame buffer operations */
644
645 static struct fb_ops vt8623fb_ops = {
646 .owner = THIS_MODULE,
647 .fb_open = vt8623fb_open,
648 .fb_release = vt8623fb_release,
649 .fb_check_var = vt8623fb_check_var,
650 .fb_set_par = vt8623fb_set_par,
651 .fb_setcolreg = vt8623fb_setcolreg,
652 .fb_blank = vt8623fb_blank,
653 .fb_pan_display = vt8623fb_pan_display,
654 .fb_fillrect = vt8623fb_fillrect,
655 .fb_copyarea = cfb_copyarea,
656 .fb_imageblit = vt8623fb_imageblit,
657 .fb_get_caps = svga_get_caps,
658 };
659
660
661 /* PCI probe */
662
663 static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
664 {
665 struct pci_bus_region bus_reg;
666 struct resource vga_res;
667 struct fb_info *info;
668 struct vt8623fb_info *par;
669 unsigned int memsize1, memsize2;
670 int rc;
671
672 /* Ignore secondary VGA device because there is no VGA arbitration */
673 if (! svga_primary_device(dev)) {
674 dev_info(&(dev->dev), "ignoring secondary device\n");
675 return -ENODEV;
676 }
677
678 /* Allocate and fill driver data structure */
679 info = framebuffer_alloc(sizeof(struct vt8623fb_info), &(dev->dev));
680 if (! info) {
681 dev_err(&(dev->dev), "cannot allocate memory\n");
682 return -ENOMEM;
683 }
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(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, &vga_res, &bus_reg);
731
732 par->state.vgabase = (void __iomem *) 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 kparam_block_sysfs_write(mode_option);
756 rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
757 kparam_unblock_sysfs_write(mode_option);
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 framebugger\n");
773 goto err_reg_fb;
774 }
775
776 printk(KERN_INFO "fb%d: %s on %s, %d MB RAM\n", info->node, info->fix.id,
777 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 #ifdef CONFIG_MTRR
783 if (mtrr) {
784 par->mtrr_reg = -1;
785 par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
786 }
787 #endif
788
789 return 0;
790
791 /* Error handling */
792 err_reg_fb:
793 fb_dealloc_cmap(&info->cmap);
794 err_alloc_cmap:
795 err_find_mode:
796 pci_iounmap(dev, par->mmio_base);
797 err_iomap_2:
798 pci_iounmap(dev, info->screen_base);
799 err_iomap_1:
800 pci_release_regions(dev);
801 err_request_regions:
802 /* pci_disable_device(dev); */
803 err_enable_device:
804 framebuffer_release(info);
805 return rc;
806 }
807
808 /* PCI remove */
809
810 static void __devexit vt8623_pci_remove(struct pci_dev *dev)
811 {
812 struct fb_info *info = pci_get_drvdata(dev);
813
814 if (info) {
815 struct vt8623fb_info *par = info->par;
816
817 #ifdef CONFIG_MTRR
818 if (par->mtrr_reg >= 0) {
819 mtrr_del(par->mtrr_reg, 0, 0);
820 par->mtrr_reg = -1;
821 }
822 #endif
823
824 unregister_framebuffer(info);
825 fb_dealloc_cmap(&info->cmap);
826
827 pci_iounmap(dev, info->screen_base);
828 pci_iounmap(dev, par->mmio_base);
829 pci_release_regions(dev);
830 /* pci_disable_device(dev); */
831
832 pci_set_drvdata(dev, NULL);
833 framebuffer_release(info);
834 }
835 }
836
837
838 #ifdef CONFIG_PM
839 /* PCI suspend */
840
841 static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
842 {
843 struct fb_info *info = pci_get_drvdata(dev);
844 struct vt8623fb_info *par = info->par;
845
846 dev_info(info->device, "suspend\n");
847
848 console_lock();
849 mutex_lock(&(par->open_lock));
850
851 if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
852 mutex_unlock(&(par->open_lock));
853 console_unlock();
854 return 0;
855 }
856
857 fb_set_suspend(info, 1);
858
859 pci_save_state(dev);
860 pci_disable_device(dev);
861 pci_set_power_state(dev, pci_choose_state(dev, state));
862
863 mutex_unlock(&(par->open_lock));
864 console_unlock();
865
866 return 0;
867 }
868
869
870 /* PCI resume */
871
872 static int vt8623_pci_resume(struct pci_dev* dev)
873 {
874 struct fb_info *info = pci_get_drvdata(dev);
875 struct vt8623fb_info *par = info->par;
876
877 dev_info(info->device, "resume\n");
878
879 console_lock();
880 mutex_lock(&(par->open_lock));
881
882 if (par->ref_count == 0)
883 goto fail;
884
885 pci_set_power_state(dev, PCI_D0);
886 pci_restore_state(dev);
887
888 if (pci_enable_device(dev))
889 goto fail;
890
891 pci_set_master(dev);
892
893 vt8623fb_set_par(info);
894 fb_set_suspend(info, 0);
895
896 fail:
897 mutex_unlock(&(par->open_lock));
898 console_unlock();
899
900 return 0;
901 }
902 #else
903 #define vt8623_pci_suspend NULL
904 #define vt8623_pci_resume NULL
905 #endif /* CONFIG_PM */
906
907 /* List of boards that we are trying to support */
908
909 static struct pci_device_id vt8623_devices[] __devinitdata = {
910 {PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
911 {0, 0, 0, 0, 0, 0, 0}
912 };
913
914 MODULE_DEVICE_TABLE(pci, vt8623_devices);
915
916 static struct pci_driver vt8623fb_pci_driver = {
917 .name = "vt8623fb",
918 .id_table = vt8623_devices,
919 .probe = vt8623_pci_probe,
920 .remove = __devexit_p(vt8623_pci_remove),
921 .suspend = vt8623_pci_suspend,
922 .resume = vt8623_pci_resume,
923 };
924
925 /* Cleanup */
926
927 static void __exit vt8623fb_cleanup(void)
928 {
929 pr_debug("vt8623fb: cleaning up\n");
930 pci_unregister_driver(&vt8623fb_pci_driver);
931 }
932
933 /* Driver Initialisation */
934
935 static int __init vt8623fb_init(void)
936 {
937
938 #ifndef MODULE
939 char *option = NULL;
940
941 if (fb_get_options("vt8623fb", &option))
942 return -ENODEV;
943
944 if (option && *option)
945 mode_option = option;
946 #endif
947
948 pr_debug("vt8623fb: initializing\n");
949 return pci_register_driver(&vt8623fb_pci_driver);
950 }
951
952 /* ------------------------------------------------------------------------- */
953
954 /* Modularization */
955
956 module_init(vt8623fb_init);
957 module_exit(vt8623fb_cleanup);