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ondemand: Solve a big performance issue by counting IOWAIT time as busy
[linux/fpc-iii.git] / drivers / video / vt8623fb.c
blobd31dc96f838a29576d1c11a0cbd6857d266475ac
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 acquire_console_sem() */
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
125 static struct fb_tile_ops vt8623fb_tile_ops = {
126 .fb_settile = svga_settile,
127 .fb_tilecopy = svga_tilecopy,
128 .fb_tilefill = svga_tilefill,
129 .fb_tileblit = svga_tileblit,
130 .fb_tilecursor = svga_tilecursor,
131 .fb_get_tilemax = svga_get_tilemax,
132 };
133
134
135 /* ------------------------------------------------------------------------- */
136
137
138 /* image data is MSB-first, fb structure is MSB-first too */
139 static inline u32 expand_color(u32 c)
140 {
141 return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
142 }
143
144 /* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
145 static void vt8623fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
146 {
147 u32 fg = expand_color(image->fg_color);
148 u32 bg = expand_color(image->bg_color);
149 const u8 *src1, *src;
150 u8 __iomem *dst1;
151 u32 __iomem *dst;
152 u32 val;
153 int x, y;
154
155 src1 = image->data;
156 dst1 = info->screen_base + (image->dy * info->fix.line_length)
157 + ((image->dx / 8) * 4);
158
159 for (y = 0; y < image->height; y++) {
160 src = src1;
161 dst = (u32 __iomem *) dst1;
162 for (x = 0; x < image->width; x += 8) {
163 val = *(src++) * 0x01010101;
164 val = (val & fg) | (~val & bg);
165 fb_writel(val, dst++);
166 }
167 src1 += image->width / 8;
168 dst1 += info->fix.line_length;
169 }
170 }
171
172 /* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
173 static void vt8623fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
174 {
175 u32 fg = expand_color(rect->color);
176 u8 __iomem *dst1;
177 u32 __iomem *dst;
178 int x, y;
179
180 dst1 = info->screen_base + (rect->dy * info->fix.line_length)
181 + ((rect->dx / 8) * 4);
182
183 for (y = 0; y < rect->height; y++) {
184 dst = (u32 __iomem *) dst1;
185 for (x = 0; x < rect->width; x += 8) {
186 fb_writel(fg, dst++);
187 }
188 dst1 += info->fix.line_length;
189 }
190 }
191
192
193 /* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
194 static inline u32 expand_pixel(u32 c)
195 {
196 return (((c & 1) << 24) | ((c & 2) << 27) | ((c & 4) << 14) | ((c & 8) << 17) |
197 ((c & 16) << 4) | ((c & 32) << 7) | ((c & 64) >> 6) | ((c & 128) >> 3)) * 0xF;
198 }
199
200 /* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
201 static void vt8623fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
202 {
203 u32 fg = image->fg_color * 0x11111111;
204 u32 bg = image->bg_color * 0x11111111;
205 const u8 *src1, *src;
206 u8 __iomem *dst1;
207 u32 __iomem *dst;
208 u32 val;
209 int x, y;
210
211 src1 = image->data;
212 dst1 = info->screen_base + (image->dy * info->fix.line_length)
213 + ((image->dx / 8) * 4);
214
215 for (y = 0; y < image->height; y++) {
216 src = src1;
217 dst = (u32 __iomem *) dst1;
218 for (x = 0; x < image->width; x += 8) {
219 val = expand_pixel(*(src++));
220 val = (val & fg) | (~val & bg);
221 fb_writel(val, dst++);
222 }
223 src1 += image->width / 8;
224 dst1 += info->fix.line_length;
225 }
226 }
227
228 static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image)
229 {
230 if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
231 && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
232 if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
233 vt8623fb_iplan_imageblit(info, image);
234 else
235 vt8623fb_cfb4_imageblit(info, image);
236 } else
237 cfb_imageblit(info, image);
238 }
239
240 static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
241 {
242 if ((info->var.bits_per_pixel == 4)
243 && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
244 && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
245 vt8623fb_iplan_fillrect(info, rect);
246 else
247 cfb_fillrect(info, rect);
248 }
249
250
251 /* ------------------------------------------------------------------------- */
252
253
254 static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
255 {
256 u16 m, n, r;
257 u8 regval;
258 int rv;
259
260 rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
261 if (rv < 0) {
262 printk(KERN_ERR "fb%d: cannot set requested pixclock, keeping old value\n", info->node);
263 return;
264 }
265
266 /* Set VGA misc register */
267 regval = vga_r(NULL, VGA_MIS_R);
268 vga_w(NULL, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
269
270 /* Set clock registers */
271 vga_wseq(NULL, 0x46, (n | (r << 6)));
272 vga_wseq(NULL, 0x47, m);
273
274 udelay(1000);
275
276 /* PLL reset */
277 svga_wseq_mask(0x40, 0x02, 0x02);
278 svga_wseq_mask(0x40, 0x00, 0x02);
279 }
280
281
282 static int vt8623fb_open(struct fb_info *info, int user)
283 {
284 struct vt8623fb_info *par = info->par;
285
286 mutex_lock(&(par->open_lock));
287 if (par->ref_count == 0) {
288 memset(&(par->state), 0, sizeof(struct vgastate));
289 par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
290 par->state.num_crtc = 0xA2;
291 par->state.num_seq = 0x50;
292 save_vga(&(par->state));
293 }
294
295 par->ref_count++;
296 mutex_unlock(&(par->open_lock));
297
298 return 0;
299 }
300
301 static int vt8623fb_release(struct fb_info *info, int user)
302 {
303 struct vt8623fb_info *par = info->par;
304
305 mutex_lock(&(par->open_lock));
306 if (par->ref_count == 0) {
307 mutex_unlock(&(par->open_lock));
308 return -EINVAL;
309 }
310
311 if (par->ref_count == 1)
312 restore_vga(&(par->state));
313
314 par->ref_count--;
315 mutex_unlock(&(par->open_lock));
316
317 return 0;
318 }
319
320 static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
321 {
322 int rv, mem, step;
323
324 /* Find appropriate format */
325 rv = svga_match_format (vt8623fb_formats, var, NULL);
326 if (rv < 0)
327 {
328 printk(KERN_ERR "fb%d: unsupported mode requested\n", info->node);
329 return rv;
330 }
331
332 /* Do not allow to have real resoulution larger than virtual */
333 if (var->xres > var->xres_virtual)
334 var->xres_virtual = var->xres;
335
336 if (var->yres > var->yres_virtual)
337 var->yres_virtual = var->yres;
338
339 /* Round up xres_virtual to have proper alignment of lines */
340 step = vt8623fb_formats[rv].xresstep - 1;
341 var->xres_virtual = (var->xres_virtual+step) & ~step;
342
343 /* Check whether have enough memory */
344 mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
345 if (mem > info->screen_size)
346 {
347 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));
348 return -EINVAL;
349 }
350
351 /* Text mode is limited to 256 kB of memory */
352 if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
353 {
354 printk(KERN_ERR "fb%d: text framebuffer size too large (%d kB requested, 256 kB possible)\n", info->node, mem >> 10);
355 return -EINVAL;
356 }
357
358 rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
359 if (rv < 0)
360 {
361 printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
362 return rv;
363 }
364
365 /* Interlaced mode not supported */
366 if (var->vmode & FB_VMODE_INTERLACED)
367 return -EINVAL;
368
369 return 0;
370 }
371
372
373 static int vt8623fb_set_par(struct fb_info *info)
374 {
375 u32 mode, offset_value, fetch_value, screen_size;
376 u32 bpp = info->var.bits_per_pixel;
377
378 if (bpp != 0) {
379 info->fix.ypanstep = 1;
380 info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
381
382 info->flags &= ~FBINFO_MISC_TILEBLITTING;
383 info->tileops = NULL;
384
385 /* in 4bpp supports 8p wide tiles only, any tiles otherwise */
386 info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
387 info->pixmap.blit_y = ~(u32)0;
388
389 offset_value = (info->var.xres_virtual * bpp) / 64;
390 fetch_value = ((info->var.xres * bpp) / 128) + 4;
391
392 if (bpp == 4)
393 fetch_value = (info->var.xres / 8) + 8; /* + 0 is OK */
394
395 screen_size = info->var.yres_virtual * info->fix.line_length;
396 } else {
397 info->fix.ypanstep = 16;
398 info->fix.line_length = 0;
399
400 info->flags |= FBINFO_MISC_TILEBLITTING;
401 info->tileops = &vt8623fb_tile_ops;
402
403 /* supports 8x16 tiles only */
404 info->pixmap.blit_x = 1 << (8 - 1);
405 info->pixmap.blit_y = 1 << (16 - 1);
406
407 offset_value = info->var.xres_virtual / 16;
408 fetch_value = (info->var.xres / 8) + 8;
409 screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
410 }
411
412 info->var.xoffset = 0;
413 info->var.yoffset = 0;
414 info->var.activate = FB_ACTIVATE_NOW;
415
416 /* Unlock registers */
417 svga_wseq_mask(0x10, 0x01, 0x01);
418 svga_wcrt_mask(0x11, 0x00, 0x80);
419 svga_wcrt_mask(0x47, 0x00, 0x01);
420
421 /* Device, screen and sync off */
422 svga_wseq_mask(0x01, 0x20, 0x20);
423 svga_wcrt_mask(0x36, 0x30, 0x30);
424 svga_wcrt_mask(0x17, 0x00, 0x80);
425
426 /* Set default values */
427 svga_set_default_gfx_regs();
428 svga_set_default_atc_regs();
429 svga_set_default_seq_regs();
430 svga_set_default_crt_regs();
431 svga_wcrt_multi(vt8623_line_compare_regs, 0xFFFFFFFF);
432 svga_wcrt_multi(vt8623_start_address_regs, 0);
433
434 svga_wcrt_multi(vt8623_offset_regs, offset_value);
435 svga_wseq_multi(vt8623_fetch_count_regs, fetch_value);
436
437 /* Clear H/V Skew */
438 svga_wcrt_mask(0x03, 0x00, 0x60);
439 svga_wcrt_mask(0x05, 0x00, 0x60);
440
441 if (info->var.vmode & FB_VMODE_DOUBLE)
442 svga_wcrt_mask(0x09, 0x80, 0x80);
443 else
444 svga_wcrt_mask(0x09, 0x00, 0x80);
445
446 svga_wseq_mask(0x1E, 0xF0, 0xF0); // DI/DVP bus
447 svga_wseq_mask(0x2A, 0x0F, 0x0F); // DI/DVP bus
448 svga_wseq_mask(0x16, 0x08, 0xBF); // FIFO read threshold
449 vga_wseq(NULL, 0x17, 0x1F); // FIFO depth
450 vga_wseq(NULL, 0x18, 0x4E);
451 svga_wseq_mask(0x1A, 0x08, 0x08); // enable MMIO ?
452
453 vga_wcrt(NULL, 0x32, 0x00);
454 vga_wcrt(NULL, 0x34, 0x00);
455 vga_wcrt(NULL, 0x6A, 0x80);
456 vga_wcrt(NULL, 0x6A, 0xC0);
457
458 vga_wgfx(NULL, 0x20, 0x00);
459 vga_wgfx(NULL, 0x21, 0x00);
460 vga_wgfx(NULL, 0x22, 0x00);
461
462 /* Set SR15 according to number of bits per pixel */
463 mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
464 switch (mode) {
465 case 0:
466 pr_debug("fb%d: text mode\n", info->node);
467 svga_set_textmode_vga_regs();
468 svga_wseq_mask(0x15, 0x00, 0xFE);
469 svga_wcrt_mask(0x11, 0x60, 0x70);
470 break;
471 case 1:
472 pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
473 vga_wgfx(NULL, VGA_GFX_MODE, 0x40);
474 svga_wseq_mask(0x15, 0x20, 0xFE);
475 svga_wcrt_mask(0x11, 0x00, 0x70);
476 break;
477 case 2:
478 pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
479 svga_wseq_mask(0x15, 0x00, 0xFE);
480 svga_wcrt_mask(0x11, 0x00, 0x70);
481 break;
482 case 3:
483 pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
484 svga_wseq_mask(0x15, 0x22, 0xFE);
485 break;
486 case 4:
487 pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
488 svga_wseq_mask(0x15, 0xB6, 0xFE);
489 break;
490 case 5:
491 pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
492 svga_wseq_mask(0x15, 0xAE, 0xFE);
493 break;
494 default:
495 printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
496 return (-EINVAL);
497 }
498
499 vt8623_set_pixclock(info, info->var.pixclock);
500 svga_set_timings(&vt8623_timing_regs, &(info->var), 1, 1,
501 (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
502 1, info->node);
503
504 memset_io(info->screen_base, 0x00, screen_size);
505
506 /* Device and screen back on */
507 svga_wcrt_mask(0x17, 0x80, 0x80);
508 svga_wcrt_mask(0x36, 0x00, 0x30);
509 svga_wseq_mask(0x01, 0x00, 0x20);
510
511 return 0;
512 }
513
514
515 static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
516 u_int transp, struct fb_info *fb)
517 {
518 switch (fb->var.bits_per_pixel) {
519 case 0:
520 case 4:
521 if (regno >= 16)
522 return -EINVAL;
523
524 outb(0x0F, VGA_PEL_MSK);
525 outb(regno, VGA_PEL_IW);
526 outb(red >> 10, VGA_PEL_D);
527 outb(green >> 10, VGA_PEL_D);
528 outb(blue >> 10, VGA_PEL_D);
529 break;
530 case 8:
531 if (regno >= 256)
532 return -EINVAL;
533
534 outb(0xFF, VGA_PEL_MSK);
535 outb(regno, VGA_PEL_IW);
536 outb(red >> 10, VGA_PEL_D);
537 outb(green >> 10, VGA_PEL_D);
538 outb(blue >> 10, VGA_PEL_D);
539 break;
540 case 16:
541 if (regno >= 16)
542 return 0;
543
544 if (fb->var.green.length == 5)
545 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
546 ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
547 else if (fb->var.green.length == 6)
548 ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
549 ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
550 else
551 return -EINVAL;
552 break;
553 case 24:
554 case 32:
555 if (regno >= 16)
556 return 0;
557
558 /* ((transp & 0xFF00) << 16) */
559 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
560 (green & 0xFF00) | ((blue & 0xFF00) >> 8);
561 break;
562 default:
563 return -EINVAL;
564 }
565
566 return 0;
567 }
568
569
570 static int vt8623fb_blank(int blank_mode, struct fb_info *info)
571 {
572 switch (blank_mode) {
573 case FB_BLANK_UNBLANK:
574 pr_debug("fb%d: unblank\n", info->node);
575 svga_wcrt_mask(0x36, 0x00, 0x30);
576 svga_wseq_mask(0x01, 0x00, 0x20);
577 break;
578 case FB_BLANK_NORMAL:
579 pr_debug("fb%d: blank\n", info->node);
580 svga_wcrt_mask(0x36, 0x00, 0x30);
581 svga_wseq_mask(0x01, 0x20, 0x20);
582 break;
583 case FB_BLANK_HSYNC_SUSPEND:
584 pr_debug("fb%d: DPMS standby (hsync off)\n", info->node);
585 svga_wcrt_mask(0x36, 0x10, 0x30);
586 svga_wseq_mask(0x01, 0x20, 0x20);
587 break;
588 case FB_BLANK_VSYNC_SUSPEND:
589 pr_debug("fb%d: DPMS suspend (vsync off)\n", info->node);
590 svga_wcrt_mask(0x36, 0x20, 0x30);
591 svga_wseq_mask(0x01, 0x20, 0x20);
592 break;
593 case FB_BLANK_POWERDOWN:
594 pr_debug("fb%d: DPMS off (no sync)\n", info->node);
595 svga_wcrt_mask(0x36, 0x30, 0x30);
596 svga_wseq_mask(0x01, 0x20, 0x20);
597 break;
598 }
599
600 return 0;
601 }
602
603
604 static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
605 {
606 unsigned int offset;
607
608 /* Calculate the offset */
609 if (var->bits_per_pixel == 0) {
610 offset = (var->yoffset / 16) * var->xres_virtual + var->xoffset;
611 offset = offset >> 3;
612 } else {
613 offset = (var->yoffset * info->fix.line_length) +
614 (var->xoffset * var->bits_per_pixel / 8);
615 offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 1);
616 }
617
618 /* Set the offset */
619 svga_wcrt_multi(vt8623_start_address_regs, offset);
620
621 return 0;
622 }
623
624
625 /* ------------------------------------------------------------------------- */
626
627
628 /* Frame buffer operations */
629
630 static struct fb_ops vt8623fb_ops = {
631 .owner = THIS_MODULE,
632 .fb_open = vt8623fb_open,
633 .fb_release = vt8623fb_release,
634 .fb_check_var = vt8623fb_check_var,
635 .fb_set_par = vt8623fb_set_par,
636 .fb_setcolreg = vt8623fb_setcolreg,
637 .fb_blank = vt8623fb_blank,
638 .fb_pan_display = vt8623fb_pan_display,
639 .fb_fillrect = vt8623fb_fillrect,
640 .fb_copyarea = cfb_copyarea,
641 .fb_imageblit = vt8623fb_imageblit,
642 .fb_get_caps = svga_get_caps,
643 };
644
645
646 /* PCI probe */
647
648 static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
649 {
650 struct fb_info *info;
651 struct vt8623fb_info *par;
652 unsigned int memsize1, memsize2;
653 int rc;
654
655 /* Ignore secondary VGA device because there is no VGA arbitration */
656 if (! svga_primary_device(dev)) {
657 dev_info(&(dev->dev), "ignoring secondary device\n");
658 return -ENODEV;
659 }
660
661 /* Allocate and fill driver data structure */
662 info = framebuffer_alloc(sizeof(struct vt8623fb_info), &(dev->dev));
663 if (! info) {
664 dev_err(&(dev->dev), "cannot allocate memory\n");
665 return -ENOMEM;
666 }
667
668 par = info->par;
669 mutex_init(&par->open_lock);
670
671 info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
672 info->fbops = &vt8623fb_ops;
673
674 /* Prepare PCI device */
675
676 rc = pci_enable_device(dev);
677 if (rc < 0) {
678 dev_err(info->device, "cannot enable PCI device\n");
679 goto err_enable_device;
680 }
681
682 rc = pci_request_regions(dev, "vt8623fb");
683 if (rc < 0) {
684 dev_err(info->device, "cannot reserve framebuffer region\n");
685 goto err_request_regions;
686 }
687
688 info->fix.smem_start = pci_resource_start(dev, 0);
689 info->fix.smem_len = pci_resource_len(dev, 0);
690 info->fix.mmio_start = pci_resource_start(dev, 1);
691 info->fix.mmio_len = pci_resource_len(dev, 1);
692
693 /* Map physical IO memory address into kernel space */
694 info->screen_base = pci_iomap(dev, 0, 0);
695 if (! info->screen_base) {
696 rc = -ENOMEM;
697 dev_err(info->device, "iomap for framebuffer failed\n");
698 goto err_iomap_1;
699 }
700
701 par->mmio_base = pci_iomap(dev, 1, 0);
702 if (! par->mmio_base) {
703 rc = -ENOMEM;
704 dev_err(info->device, "iomap for MMIO failed\n");
705 goto err_iomap_2;
706 }
707
708 /* Find how many physical memory there is on card */
709 memsize1 = (vga_rseq(NULL, 0x34) + 1) >> 1;
710 memsize2 = vga_rseq(NULL, 0x39) << 2;
711
712 if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2))
713 info->screen_size = memsize1 << 20;
714 else {
715 dev_err(info->device, "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2);
716 info->screen_size = 16 << 20;
717 }
718
719 info->fix.smem_len = info->screen_size;
720 strcpy(info->fix.id, "VIA VT8623");
721 info->fix.type = FB_TYPE_PACKED_PIXELS;
722 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
723 info->fix.ypanstep = 0;
724 info->fix.accel = FB_ACCEL_NONE;
725 info->pseudo_palette = (void*)par->pseudo_palette;
726
727 /* Prepare startup mode */
728
729 rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
730 if (! ((rc == 1) || (rc == 2))) {
731 rc = -EINVAL;
732 dev_err(info->device, "mode %s not found\n", mode_option);
733 goto err_find_mode;
734 }
735
736 rc = fb_alloc_cmap(&info->cmap, 256, 0);
737 if (rc < 0) {
738 dev_err(info->device, "cannot allocate colormap\n");
739 goto err_alloc_cmap;
740 }
741
742 rc = register_framebuffer(info);
743 if (rc < 0) {
744 dev_err(info->device, "cannot register framebugger\n");
745 goto err_reg_fb;
746 }
747
748 printk(KERN_INFO "fb%d: %s on %s, %d MB RAM\n", info->node, info->fix.id,
749 pci_name(dev), info->fix.smem_len >> 20);
750
751 /* Record a reference to the driver data */
752 pci_set_drvdata(dev, info);
753
754 #ifdef CONFIG_MTRR
755 if (mtrr) {
756 par->mtrr_reg = -1;
757 par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
758 }
759 #endif
760
761 return 0;
762
763 /* Error handling */
764 err_reg_fb:
765 fb_dealloc_cmap(&info->cmap);
766 err_alloc_cmap:
767 err_find_mode:
768 pci_iounmap(dev, par->mmio_base);
769 err_iomap_2:
770 pci_iounmap(dev, info->screen_base);
771 err_iomap_1:
772 pci_release_regions(dev);
773 err_request_regions:
774 /* pci_disable_device(dev); */
775 err_enable_device:
776 framebuffer_release(info);
777 return rc;
778 }
779
780 /* PCI remove */
781
782 static void __devexit vt8623_pci_remove(struct pci_dev *dev)
783 {
784 struct fb_info *info = pci_get_drvdata(dev);
785
786 if (info) {
787 struct vt8623fb_info *par = info->par;
788
789 #ifdef CONFIG_MTRR
790 if (par->mtrr_reg >= 0) {
791 mtrr_del(par->mtrr_reg, 0, 0);
792 par->mtrr_reg = -1;
793 }
794 #endif
795
796 unregister_framebuffer(info);
797 fb_dealloc_cmap(&info->cmap);
798
799 pci_iounmap(dev, info->screen_base);
800 pci_iounmap(dev, par->mmio_base);
801 pci_release_regions(dev);
802 /* pci_disable_device(dev); */
803
804 pci_set_drvdata(dev, NULL);
805 framebuffer_release(info);
806 }
807 }
808
809
810 #ifdef CONFIG_PM
811 /* PCI suspend */
812
813 static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
814 {
815 struct fb_info *info = pci_get_drvdata(dev);
816 struct vt8623fb_info *par = info->par;
817
818 dev_info(info->device, "suspend\n");
819
820 acquire_console_sem();
821 mutex_lock(&(par->open_lock));
822
823 if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
824 mutex_unlock(&(par->open_lock));
825 release_console_sem();
826 return 0;
827 }
828
829 fb_set_suspend(info, 1);
830
831 pci_save_state(dev);
832 pci_disable_device(dev);
833 pci_set_power_state(dev, pci_choose_state(dev, state));
834
835 mutex_unlock(&(par->open_lock));
836 release_console_sem();
837
838 return 0;
839 }
840
841
842 /* PCI resume */
843
844 static int vt8623_pci_resume(struct pci_dev* dev)
845 {
846 struct fb_info *info = pci_get_drvdata(dev);
847 struct vt8623fb_info *par = info->par;
848
849 dev_info(info->device, "resume\n");
850
851 acquire_console_sem();
852 mutex_lock(&(par->open_lock));
853
854 if (par->ref_count == 0)
855 goto fail;
856
857 pci_set_power_state(dev, PCI_D0);
858 pci_restore_state(dev);
859
860 if (pci_enable_device(dev))
861 goto fail;
862
863 pci_set_master(dev);
864
865 vt8623fb_set_par(info);
866 fb_set_suspend(info, 0);
867
868 fail:
869 mutex_unlock(&(par->open_lock));
870 release_console_sem();
871
872 return 0;
873 }
874 #else
875 #define vt8623_pci_suspend NULL
876 #define vt8623_pci_resume NULL
877 #endif /* CONFIG_PM */
878
879 /* List of boards that we are trying to support */
880
881 static struct pci_device_id vt8623_devices[] __devinitdata = {
882 {PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
883 {0, 0, 0, 0, 0, 0, 0}
884 };
885
886 MODULE_DEVICE_TABLE(pci, vt8623_devices);
887
888 static struct pci_driver vt8623fb_pci_driver = {
889 .name = "vt8623fb",
890 .id_table = vt8623_devices,
891 .probe = vt8623_pci_probe,
892 .remove = __devexit_p(vt8623_pci_remove),
893 .suspend = vt8623_pci_suspend,
894 .resume = vt8623_pci_resume,
895 };
896
897 /* Cleanup */
898
899 static void __exit vt8623fb_cleanup(void)
900 {
901 pr_debug("vt8623fb: cleaning up\n");
902 pci_unregister_driver(&vt8623fb_pci_driver);
903 }
904
905 /* Driver Initialisation */
906
907 static int __init vt8623fb_init(void)
908 {
909
910 #ifndef MODULE
911 char *option = NULL;
912
913 if (fb_get_options("vt8623fb", &option))
914 return -ENODEV;
915
916 if (option && *option)
917 mode_option = option;
918 #endif
919
920 pr_debug("vt8623fb: initializing\n");
921 return pci_register_driver(&vt8623fb_pci_driver);
922 }
923
924 /* ------------------------------------------------------------------------- */
925
926 /* Modularization */
927
928 module_init(vt8623fb_init);
929 module_exit(vt8623fb_cleanup);
Linux with added FPC-III support