2 * linux/drivers/video/vt8623fb.c - fbdev driver for
3 * integrated graphic core in VIA VT8623 [CLE266] chipset
5 * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>
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
11 * Code is based on s3fb, some parts are from David Boucher's viafb
12 * (http://davesdomain.org.uk/viafb/)
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/string.h>
20 #include <linux/tty.h>
21 #include <linux/delay.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>
33 struct vt8623fb_info {
34 char __iomem *mmio_base;
36 struct vgastate state;
37 struct mutex open_lock;
38 unsigned int ref_count;
39 u32 pseudo_palette[16];
44 /* ------------------------------------------------------------------------- */
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},
64 static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3,
65 60000, 300000, 14318};
67 /* CRT timing register sets */
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};
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};
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};
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,
96 /* ------------------------------------------------------------------------- */
99 /* Module parameters */
101 static char *mode_option = "640x480-8@60";
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]");
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)");
117 module_param(mtrr, int, 0444);
118 MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
122 /* ------------------------------------------------------------------------- */
124 static void vt8623fb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
126 struct vt8623fb_info *par = info->par;
128 svga_tilecursor(par->state.vgabase, info, cursor);
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,
141 /* ------------------------------------------------------------------------- */
144 /* image data is MSB-first, fb structure is MSB-first too */
145 static inline u32 expand_color(u32 c)
147 return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
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)
153 u32 fg = expand_color(image->fg_color);
154 u32 bg = expand_color(image->bg_color);
155 const u8 *src1, *src;
162 dst1 = info->screen_base + (image->dy * info->fix.line_length)
163 + ((image->dx / 8) * 4);
165 for (y = 0; y < image->height; y++) {
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++);
173 src1 += image->width / 8;
174 dst1 += info->fix.line_length;
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)
181 u32 fg = expand_color(rect->color);
186 dst1 = info->screen_base + (rect->dy * info->fix.line_length)
187 + ((rect->dx / 8) * 4);
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++);
194 dst1 += info->fix.line_length;
199 /* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
200 static inline u32 expand_pixel(u32 c)
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;
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)
209 u32 fg = image->fg_color * 0x11111111;
210 u32 bg = image->bg_color * 0x11111111;
211 const u8 *src1, *src;
218 dst1 = info->screen_base + (image->dy * info->fix.line_length)
219 + ((image->dx / 8) * 4);
221 for (y = 0; y < image->height; y++) {
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++);
229 src1 += image->width / 8;
230 dst1 += info->fix.line_length;
234 static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image)
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);
241 vt8623fb_cfb4_imageblit(info, image);
243 cfb_imageblit(info, image);
246 static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
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);
253 cfb_fillrect(info, rect);
257 /* ------------------------------------------------------------------------- */
260 static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
262 struct vt8623fb_info *par = info->par;
267 rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
269 fb_err(info, "cannot set requested pixclock, keeping old value\n");
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);
277 /* Set clock registers */
278 vga_wseq(par->state.vgabase, 0x46, (n | (r << 6)));
279 vga_wseq(par->state.vgabase, 0x47, m);
284 svga_wseq_mask(par->state.vgabase, 0x40, 0x02, 0x02);
285 svga_wseq_mask(par->state.vgabase, 0x40, 0x00, 0x02);
289 static int vt8623fb_open(struct fb_info *info, int user)
291 struct vt8623fb_info *par = info->par;
293 mutex_lock(&(par->open_lock));
294 if (par->ref_count == 0) {
295 void __iomem *vgabase = par->state.vgabase;
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));
306 mutex_unlock(&(par->open_lock));
311 static int vt8623fb_release(struct fb_info *info, int user)
313 struct vt8623fb_info *par = info->par;
315 mutex_lock(&(par->open_lock));
316 if (par->ref_count == 0) {
317 mutex_unlock(&(par->open_lock));
321 if (par->ref_count == 1)
322 restore_vga(&(par->state));
325 mutex_unlock(&(par->open_lock));
330 static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
334 /* Find appropriate format */
335 rv = svga_match_format (vt8623fb_formats, var, NULL);
338 fb_err(info, "unsupported mode requested\n");
342 /* Do not allow to have real resoulution larger than virtual */
343 if (var->xres > var->xres_virtual)
344 var->xres_virtual = var->xres;
346 if (var->yres > var->yres_virtual)
347 var->yres_virtual = var->yres;
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;
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)
357 fb_err(info, "not enough framebuffer memory (%d kB requested, %d kB available)\n",
358 mem >> 10, (unsigned int) (info->screen_size >> 10));
362 /* Text mode is limited to 256 kB of memory */
363 if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
365 fb_err(info, "text framebuffer size too large (%d kB requested, 256 kB possible)\n",
370 rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
373 fb_err(info, "invalid timings requested\n");
377 /* Interlaced mode not supported */
378 if (var->vmode & FB_VMODE_INTERLACED)
385 static int vt8623fb_set_par(struct fb_info *info)
387 u32 mode, offset_value, fetch_value, screen_size;
388 struct vt8623fb_info *par = info->par;
389 u32 bpp = info->var.bits_per_pixel;
392 info->fix.ypanstep = 1;
393 info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
395 info->flags &= ~FBINFO_MISC_TILEBLITTING;
396 info->tileops = NULL;
398 /* in 4bpp supports 8p wide tiles only, any tiles otherwise */
399 info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
400 info->pixmap.blit_y = ~(u32)0;
402 offset_value = (info->var.xres_virtual * bpp) / 64;
403 fetch_value = ((info->var.xres * bpp) / 128) + 4;
406 fetch_value = (info->var.xres / 8) + 8; /* + 0 is OK */
408 screen_size = info->var.yres_virtual * info->fix.line_length;
410 info->fix.ypanstep = 16;
411 info->fix.line_length = 0;
413 info->flags |= FBINFO_MISC_TILEBLITTING;
414 info->tileops = &vt8623fb_tile_ops;
416 /* supports 8x16 tiles only */
417 info->pixmap.blit_x = 1 << (8 - 1);
418 info->pixmap.blit_y = 1 << (16 - 1);
420 offset_value = info->var.xres_virtual / 16;
421 fetch_value = (info->var.xres / 8) + 8;
422 screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
425 info->var.xoffset = 0;
426 info->var.yoffset = 0;
427 info->var.activate = FB_ACTIVATE_NOW;
429 /* Unlock registers */
430 svga_wseq_mask(par->state.vgabase, 0x10, 0x01, 0x01);
431 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
432 svga_wcrt_mask(par->state.vgabase, 0x47, 0x00, 0x01);
434 /* Device, screen and sync off */
435 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
436 svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
437 svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
439 /* Set default values */
440 svga_set_default_gfx_regs(par->state.vgabase);
441 svga_set_default_atc_regs(par->state.vgabase);
442 svga_set_default_seq_regs(par->state.vgabase);
443 svga_set_default_crt_regs(par->state.vgabase);
444 svga_wcrt_multi(par->state.vgabase, vt8623_line_compare_regs, 0xFFFFFFFF);
445 svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, 0);
447 svga_wcrt_multi(par->state.vgabase, vt8623_offset_regs, offset_value);
448 svga_wseq_multi(par->state.vgabase, vt8623_fetch_count_regs, fetch_value);
451 svga_wcrt_mask(par->state.vgabase, 0x03, 0x00, 0x60);
452 svga_wcrt_mask(par->state.vgabase, 0x05, 0x00, 0x60);
454 if (info->var.vmode & FB_VMODE_DOUBLE)
455 svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80);
457 svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80);
459 svga_wseq_mask(par->state.vgabase, 0x1E, 0xF0, 0xF0); // DI/DVP bus
460 svga_wseq_mask(par->state.vgabase, 0x2A, 0x0F, 0x0F); // DI/DVP bus
461 svga_wseq_mask(par->state.vgabase, 0x16, 0x08, 0xBF); // FIFO read threshold
462 vga_wseq(par->state.vgabase, 0x17, 0x1F); // FIFO depth
463 vga_wseq(par->state.vgabase, 0x18, 0x4E);
464 svga_wseq_mask(par->state.vgabase, 0x1A, 0x08, 0x08); // enable MMIO ?
466 vga_wcrt(par->state.vgabase, 0x32, 0x00);
467 vga_wcrt(par->state.vgabase, 0x34, 0x00);
468 vga_wcrt(par->state.vgabase, 0x6A, 0x80);
469 vga_wcrt(par->state.vgabase, 0x6A, 0xC0);
471 vga_wgfx(par->state.vgabase, 0x20, 0x00);
472 vga_wgfx(par->state.vgabase, 0x21, 0x00);
473 vga_wgfx(par->state.vgabase, 0x22, 0x00);
475 /* Set SR15 according to number of bits per pixel */
476 mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
479 fb_dbg(info, "text mode\n");
480 svga_set_textmode_vga_regs(par->state.vgabase);
481 svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
482 svga_wcrt_mask(par->state.vgabase, 0x11, 0x60, 0x70);
485 fb_dbg(info, "4 bit pseudocolor\n");
486 vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
487 svga_wseq_mask(par->state.vgabase, 0x15, 0x20, 0xFE);
488 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
491 fb_dbg(info, "4 bit pseudocolor, planar\n");
492 svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
493 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
496 fb_dbg(info, "8 bit pseudocolor\n");
497 svga_wseq_mask(par->state.vgabase, 0x15, 0x22, 0xFE);
500 fb_dbg(info, "5/6/5 truecolor\n");
501 svga_wseq_mask(par->state.vgabase, 0x15, 0xB6, 0xFE);
504 fb_dbg(info, "8/8/8 truecolor\n");
505 svga_wseq_mask(par->state.vgabase, 0x15, 0xAE, 0xFE);
508 printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
512 vt8623_set_pixclock(info, info->var.pixclock);
513 svga_set_timings(par->state.vgabase, &vt8623_timing_regs, &(info->var), 1, 1,
514 (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
517 memset_io(info->screen_base, 0x00, screen_size);
519 /* Device and screen back on */
520 svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
521 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
522 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
528 static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
529 u_int transp, struct fb_info *fb)
531 switch (fb->var.bits_per_pixel) {
537 outb(0x0F, VGA_PEL_MSK);
538 outb(regno, VGA_PEL_IW);
539 outb(red >> 10, VGA_PEL_D);
540 outb(green >> 10, VGA_PEL_D);
541 outb(blue >> 10, VGA_PEL_D);
547 outb(0xFF, VGA_PEL_MSK);
548 outb(regno, VGA_PEL_IW);
549 outb(red >> 10, VGA_PEL_D);
550 outb(green >> 10, VGA_PEL_D);
551 outb(blue >> 10, VGA_PEL_D);
557 if (fb->var.green.length == 5)
558 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
559 ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
560 else if (fb->var.green.length == 6)
561 ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
562 ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
571 /* ((transp & 0xFF00) << 16) */
572 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
573 (green & 0xFF00) | ((blue & 0xFF00) >> 8);
583 static int vt8623fb_blank(int blank_mode, struct fb_info *info)
585 struct vt8623fb_info *par = info->par;
587 switch (blank_mode) {
588 case FB_BLANK_UNBLANK:
589 fb_dbg(info, "unblank\n");
590 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
591 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
593 case FB_BLANK_NORMAL:
594 fb_dbg(info, "blank\n");
595 svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
596 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
598 case FB_BLANK_HSYNC_SUSPEND:
599 fb_dbg(info, "DPMS standby (hsync off)\n");
600 svga_wcrt_mask(par->state.vgabase, 0x36, 0x10, 0x30);
601 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
603 case FB_BLANK_VSYNC_SUSPEND:
604 fb_dbg(info, "DPMS suspend (vsync off)\n");
605 svga_wcrt_mask(par->state.vgabase, 0x36, 0x20, 0x30);
606 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
608 case FB_BLANK_POWERDOWN:
609 fb_dbg(info, "DPMS off (no sync)\n");
610 svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
611 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
619 static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
621 struct vt8623fb_info *par = info->par;
624 /* Calculate the offset */
625 if (info->var.bits_per_pixel == 0) {
626 offset = (var->yoffset / 16) * info->var.xres_virtual
628 offset = offset >> 3;
630 offset = (var->yoffset * info->fix.line_length) +
631 (var->xoffset * info->var.bits_per_pixel / 8);
632 offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 1);
636 svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, offset);
642 /* ------------------------------------------------------------------------- */
645 /* Frame buffer operations */
647 static struct fb_ops vt8623fb_ops = {
648 .owner = THIS_MODULE,
649 .fb_open = vt8623fb_open,
650 .fb_release = vt8623fb_release,
651 .fb_check_var = vt8623fb_check_var,
652 .fb_set_par = vt8623fb_set_par,
653 .fb_setcolreg = vt8623fb_setcolreg,
654 .fb_blank = vt8623fb_blank,
655 .fb_pan_display = vt8623fb_pan_display,
656 .fb_fillrect = vt8623fb_fillrect,
657 .fb_copyarea = cfb_copyarea,
658 .fb_imageblit = vt8623fb_imageblit,
659 .fb_get_caps = svga_get_caps,
665 static int vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
667 struct pci_bus_region bus_reg;
668 struct resource vga_res;
669 struct fb_info *info;
670 struct vt8623fb_info *par;
671 unsigned int memsize1, memsize2;
674 /* Ignore secondary VGA device because there is no VGA arbitration */
675 if (! svga_primary_device(dev)) {
676 dev_info(&(dev->dev), "ignoring secondary device\n");
680 /* Allocate and fill driver data structure */
681 info = framebuffer_alloc(sizeof(struct vt8623fb_info), &(dev->dev));
683 dev_err(&(dev->dev), "cannot allocate memory\n");
688 mutex_init(&par->open_lock);
690 info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
691 info->fbops = &vt8623fb_ops;
693 /* Prepare PCI device */
695 rc = pci_enable_device(dev);
697 dev_err(info->device, "cannot enable PCI device\n");
698 goto err_enable_device;
701 rc = pci_request_regions(dev, "vt8623fb");
703 dev_err(info->device, "cannot reserve framebuffer region\n");
704 goto err_request_regions;
707 info->fix.smem_start = pci_resource_start(dev, 0);
708 info->fix.smem_len = pci_resource_len(dev, 0);
709 info->fix.mmio_start = pci_resource_start(dev, 1);
710 info->fix.mmio_len = pci_resource_len(dev, 1);
712 /* Map physical IO memory address into kernel space */
713 info->screen_base = pci_iomap(dev, 0, 0);
714 if (! info->screen_base) {
716 dev_err(info->device, "iomap for framebuffer failed\n");
720 par->mmio_base = pci_iomap(dev, 1, 0);
721 if (! par->mmio_base) {
723 dev_err(info->device, "iomap for MMIO failed\n");
728 bus_reg.end = 64 * 1024;
730 vga_res.flags = IORESOURCE_IO;
732 pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
734 par->state.vgabase = (void __iomem *) vga_res.start;
736 /* Find how many physical memory there is on card */
737 memsize1 = (vga_rseq(par->state.vgabase, 0x34) + 1) >> 1;
738 memsize2 = vga_rseq(par->state.vgabase, 0x39) << 2;
740 if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2))
741 info->screen_size = memsize1 << 20;
743 dev_err(info->device, "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2);
744 info->screen_size = 16 << 20;
747 info->fix.smem_len = info->screen_size;
748 strcpy(info->fix.id, "VIA VT8623");
749 info->fix.type = FB_TYPE_PACKED_PIXELS;
750 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
751 info->fix.ypanstep = 0;
752 info->fix.accel = FB_ACCEL_NONE;
753 info->pseudo_palette = (void*)par->pseudo_palette;
755 /* Prepare startup mode */
757 kparam_block_sysfs_write(mode_option);
758 rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
759 kparam_unblock_sysfs_write(mode_option);
760 if (! ((rc == 1) || (rc == 2))) {
762 dev_err(info->device, "mode %s not found\n", mode_option);
766 rc = fb_alloc_cmap(&info->cmap, 256, 0);
768 dev_err(info->device, "cannot allocate colormap\n");
772 rc = register_framebuffer(info);
774 dev_err(info->device, "cannot register framebuffer\n");
778 fb_info(info, "%s on %s, %d MB RAM\n",
779 info->fix.id, pci_name(dev), info->fix.smem_len >> 20);
781 /* Record a reference to the driver data */
782 pci_set_drvdata(dev, info);
787 par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
795 fb_dealloc_cmap(&info->cmap);
798 pci_iounmap(dev, par->mmio_base);
800 pci_iounmap(dev, info->screen_base);
802 pci_release_regions(dev);
804 /* pci_disable_device(dev); */
806 framebuffer_release(info);
812 static void vt8623_pci_remove(struct pci_dev *dev)
814 struct fb_info *info = pci_get_drvdata(dev);
817 struct vt8623fb_info *par = info->par;
820 if (par->mtrr_reg >= 0) {
821 mtrr_del(par->mtrr_reg, 0, 0);
826 unregister_framebuffer(info);
827 fb_dealloc_cmap(&info->cmap);
829 pci_iounmap(dev, info->screen_base);
830 pci_iounmap(dev, par->mmio_base);
831 pci_release_regions(dev);
832 /* pci_disable_device(dev); */
834 framebuffer_release(info);
842 static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
844 struct fb_info *info = pci_get_drvdata(dev);
845 struct vt8623fb_info *par = info->par;
847 dev_info(info->device, "suspend\n");
850 mutex_lock(&(par->open_lock));
852 if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
853 mutex_unlock(&(par->open_lock));
858 fb_set_suspend(info, 1);
861 pci_disable_device(dev);
862 pci_set_power_state(dev, pci_choose_state(dev, state));
864 mutex_unlock(&(par->open_lock));
873 static int vt8623_pci_resume(struct pci_dev* dev)
875 struct fb_info *info = pci_get_drvdata(dev);
876 struct vt8623fb_info *par = info->par;
878 dev_info(info->device, "resume\n");
881 mutex_lock(&(par->open_lock));
883 if (par->ref_count == 0)
886 pci_set_power_state(dev, PCI_D0);
887 pci_restore_state(dev);
889 if (pci_enable_device(dev))
894 vt8623fb_set_par(info);
895 fb_set_suspend(info, 0);
898 mutex_unlock(&(par->open_lock));
904 #define vt8623_pci_suspend NULL
905 #define vt8623_pci_resume NULL
906 #endif /* CONFIG_PM */
908 /* List of boards that we are trying to support */
910 static struct pci_device_id vt8623_devices[] = {
911 {PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
912 {0, 0, 0, 0, 0, 0, 0}
915 MODULE_DEVICE_TABLE(pci, vt8623_devices);
917 static struct pci_driver vt8623fb_pci_driver = {
919 .id_table = vt8623_devices,
920 .probe = vt8623_pci_probe,
921 .remove = vt8623_pci_remove,
922 .suspend = vt8623_pci_suspend,
923 .resume = vt8623_pci_resume,
928 static void __exit vt8623fb_cleanup(void)
930 pr_debug("vt8623fb: cleaning up\n");
931 pci_unregister_driver(&vt8623fb_pci_driver);
934 /* Driver Initialisation */
936 static int __init vt8623fb_init(void)
942 if (fb_get_options("vt8623fb", &option))
945 if (option && *option)
946 mode_option = option;
949 pr_debug("vt8623fb: initializing\n");
950 return pci_register_driver(&vt8623fb_pci_driver);
953 /* ------------------------------------------------------------------------- */
957 module_init(vt8623fb_init);
958 module_exit(vt8623fb_cleanup);