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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/video/i810/i810_gtf.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/video/i810/i810_gtf.c')
-rw-r--r-- | drivers/video/i810/i810_gtf.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/drivers/video/i810/i810_gtf.c b/drivers/video/i810/i810_gtf.c new file mode 100644 index 0000000..64f087a --- /dev/null +++ b/drivers/video/i810/i810_gtf.c @@ -0,0 +1,275 @@ +/*-*- linux-c -*- + * linux/drivers/video/i810_main.h -- Intel 810 Non-discrete Video Timings + * (VESA GTF) + * + * Copyright (C) 2001 Antonino Daplas<adaplas@pol.net> + * All Rights Reserved + * + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ +#include <linux/kernel.h> + +#include "i810_regs.h" +#include "i810.h" + +/* + * FIFO and Watermark tables - based almost wholly on i810_wmark.c in + * XFree86 v4.03 by Precision Insight. Slightly modified for integer + * operation, instead of float + */ + +struct wm_info { + u32 freq; + u32 wm; +}; + +static struct wm_info i810_wm_8_100[] = { + { 15, 0x0070c000 }, { 19, 0x0070c000 }, { 25, 0x22003000 }, + { 28, 0x22003000 }, { 31, 0x22003000 }, { 36, 0x22007000 }, + { 40, 0x22007000 }, { 45, 0x22007000 }, { 49, 0x22008000 }, + { 50, 0x22008000 }, { 56, 0x22008000 }, { 65, 0x22008000 }, + { 75, 0x22008000 }, { 78, 0x22008000 }, { 80, 0x22008000 }, + { 94, 0x22008000 }, { 96, 0x22107000 }, { 99, 0x22107000 }, + { 108, 0x22107000 }, { 121, 0x22107000 }, { 128, 0x22107000 }, + { 132, 0x22109000 }, { 135, 0x22109000 }, { 157, 0x2210b000 }, + { 162, 0x2210b000 }, { 175, 0x2210b000 }, { 189, 0x2220e000 }, + { 195, 0x2220e000 }, { 202, 0x2220e000 }, { 204, 0x2220e000 }, + { 218, 0x2220f000 }, { 229, 0x22210000 }, { 234, 0x22210000 }, +}; + +static struct wm_info i810_wm_16_100[] = { + { 15, 0x0070c000 }, { 19, 0x0020c000 }, { 25, 0x22006000 }, + { 28, 0x22006000 }, { 31, 0x22007000 }, { 36, 0x22007000 }, + { 40, 0x22007000 }, { 45, 0x22007000 }, { 49, 0x22009000 }, + { 50, 0x22009000 }, { 56, 0x22108000 }, { 65, 0x2210e000 }, + { 75, 0x2210e000 }, { 78, 0x2210e000 }, { 80, 0x22210000 }, + { 94, 0x22210000 }, { 96, 0x22210000 }, { 99, 0x22210000 }, + { 108, 0x22210000 }, { 121, 0x22210000 }, { 128, 0x22210000 }, + { 132, 0x22314000 }, { 135, 0x22314000 }, { 157, 0x22415000 }, + { 162, 0x22416000 }, { 175, 0x22416000 }, { 189, 0x22416000 }, + { 195, 0x22416000 }, { 202, 0x22416000 }, { 204, 0x22416000 }, + { 218, 0x22416000 }, { 229, 0x22416000 }, +}; + +static struct wm_info i810_wm_24_100[] = { + { 15, 0x0020c000 }, { 19, 0x0040c000 }, { 25, 0x22009000 }, + { 28, 0x22009000 }, { 31, 0x2200a000 }, { 36, 0x2210c000 }, + { 40, 0x2210c000 }, { 45, 0x2210c000 }, { 49, 0x22111000 }, + { 50, 0x22111000 }, { 56, 0x22111000 }, { 65, 0x22214000 }, + { 75, 0x22214000 }, { 78, 0x22215000 }, { 80, 0x22216000 }, + { 94, 0x22218000 }, { 96, 0x22418000 }, { 99, 0x22418000 }, + { 108, 0x22418000 }, { 121, 0x22418000 }, { 128, 0x22419000 }, + { 132, 0x22519000 }, { 135, 0x4441d000 }, { 157, 0x44419000 }, + { 162, 0x44419000 }, { 175, 0x44419000 }, { 189, 0x44419000 }, + { 195, 0x44419000 }, { 202, 0x44419000 }, { 204, 0x44419000 }, +}; + +static struct wm_info i810_wm_8_133[] = { + { 15, 0x0070c000 }, { 19, 0x0070c000 }, { 25, 0x22003000 }, + { 28, 0x22003000 }, { 31, 0x22003000 }, { 36, 0x22007000 }, + { 40, 0x22007000 }, { 45, 0x22007000 }, { 49, 0x22008000 }, + { 50, 0x22008000 }, { 56, 0x22008000 }, { 65, 0x22008000 }, + { 75, 0x22008000 }, { 78, 0x22008000 }, { 80, 0x22008000 }, + { 94, 0x22008000 }, { 96, 0x22107000 }, { 99, 0x22107000 }, + { 108, 0x22107000 }, { 121, 0x22107000 }, { 128, 0x22107000 }, + { 132, 0x22109000 }, { 135, 0x22109000 }, { 157, 0x2210b000 }, + { 162, 0x2210b000 }, { 175, 0x2210b000 }, { 189, 0x2220e000 }, + { 195, 0x2220e000 }, { 202, 0x2220e000 }, { 204, 0x2220e000 }, + { 218, 0x2220f000 }, { 229, 0x22210000 }, { 234, 0x22210000 }, +}; + +static struct wm_info i810_wm_16_133[] = { + { 15, 0x0020c000 }, { 19, 0x0020c000 }, { 25, 0x22006000 }, + { 28, 0x22006000 }, { 31, 0x22007000 }, { 36, 0x22007000 }, + { 40, 0x22007000 }, { 45, 0x22007000 }, { 49, 0x22009000 }, + { 50, 0x22009000 }, { 56, 0x22108000 }, { 65, 0x2210e000 }, + { 75, 0x2210e000 }, { 78, 0x2210e000 }, { 80, 0x22210000 }, + { 94, 0x22210000 }, { 96, 0x22210000 }, { 99, 0x22210000 }, + { 108, 0x22210000 }, { 121, 0x22210000 }, { 128, 0x22210000 }, + { 132, 0x22314000 }, { 135, 0x22314000 }, { 157, 0x22415000 }, + { 162, 0x22416000 }, { 175, 0x22416000 }, { 189, 0x22416000 }, + { 195, 0x22416000 }, { 202, 0x22416000 }, { 204, 0x22416000 }, + { 218, 0x22416000 }, { 229, 0x22416000 }, +}; + +static struct wm_info i810_wm_24_133[] = { + { 15, 0x0020c000 }, { 19, 0x00408000 }, { 25, 0x22009000 }, + { 28, 0x22009000 }, { 31, 0x2200a000 }, { 36, 0x2210c000 }, + { 40, 0x2210c000 }, { 45, 0x2210c000 }, { 49, 0x22111000 }, + { 50, 0x22111000 }, { 56, 0x22111000 }, { 65, 0x22214000 }, + { 75, 0x22214000 }, { 78, 0x22215000 }, { 80, 0x22216000 }, + { 94, 0x22218000 }, { 96, 0x22418000 }, { 99, 0x22418000 }, + { 108, 0x22418000 }, { 121, 0x22418000 }, { 128, 0x22419000 }, + { 132, 0x22519000 }, { 135, 0x4441d000 }, { 157, 0x44419000 }, + { 162, 0x44419000 }, { 175, 0x44419000 }, { 189, 0x44419000 }, + { 195, 0x44419000 }, { 202, 0x44419000 }, { 204, 0x44419000 }, +}; + +void round_off_xres(u32 *xres) { } +void round_off_yres(u32 *xres, u32 *yres) { } + +/** + * i810fb_encode_registers - encode @var to hardware register values + * @var: pointer to var structure + * @par: pointer to hardware par structure + * + * DESCRIPTION: + * Timing values in @var will be converted to appropriate + * register values of @par. + */ +void i810fb_encode_registers(const struct fb_var_screeninfo *var, + struct i810fb_par *par, u32 xres, u32 yres) +{ + int n, blank_s, blank_e; + u8 __iomem *mmio = par->mmio_start_virtual; + u8 msr = 0; + + /* Horizontal */ + /* htotal */ + n = ((xres + var->right_margin + var->hsync_len + + var->left_margin) >> 3) - 5; + par->regs.cr00 = (u8) n; + par->regs.cr35 = (u8) ((n >> 8) & 1); + + /* xres */ + par->regs.cr01 = (u8) ((xres >> 3) - 1); + + /* hblank */ + blank_e = (xres + var->right_margin + var->hsync_len + + var->left_margin) >> 3; + blank_e--; + blank_s = blank_e - 127; + if (blank_s < (xres >> 3)) + blank_s = xres >> 3; + par->regs.cr02 = (u8) blank_s; + par->regs.cr03 = (u8) (blank_e & 0x1F); + par->regs.cr05 = (u8) ((blank_e & (1 << 5)) << 2); + par->regs.cr39 = (u8) ((blank_e >> 6) & 1); + + /* hsync */ + par->regs.cr04 = (u8) ((xres + var->right_margin) >> 3); + par->regs.cr05 |= (u8) (((xres + var->right_margin + + var->hsync_len) >> 3) & 0x1F); + + /* Vertical */ + /* vtotal */ + n = yres + var->lower_margin + var->vsync_len + var->upper_margin - 2; + par->regs.cr06 = (u8) (n & 0xFF); + par->regs.cr30 = (u8) ((n >> 8) & 0x0F); + + /* vsync */ + n = yres + var->lower_margin; + par->regs.cr10 = (u8) (n & 0xFF); + par->regs.cr32 = (u8) ((n >> 8) & 0x0F); + par->regs.cr11 = i810_readb(CR11, mmio) & ~0x0F; + par->regs.cr11 |= (u8) ((yres + var->lower_margin + + var->vsync_len) & 0x0F); + + /* yres */ + n = yres - 1; + par->regs.cr12 = (u8) (n & 0xFF); + par->regs.cr31 = (u8) ((n >> 8) & 0x0F); + + /* vblank */ + blank_e = yres + var->lower_margin + var->vsync_len + + var->upper_margin; + blank_e--; + blank_s = blank_e - 127; + if (blank_s < yres) + blank_s = yres; + par->regs.cr15 = (u8) (blank_s & 0xFF); + par->regs.cr33 = (u8) ((blank_s >> 8) & 0x0F); + par->regs.cr16 = (u8) (blank_e & 0xFF); + par->regs.cr09 = 0; + + /* sync polarity */ + if (!(var->sync & FB_SYNC_HOR_HIGH_ACT)) + msr |= 1 << 6; + if (!(var->sync & FB_SYNC_VERT_HIGH_ACT)) + msr |= 1 << 7; + par->regs.msr = msr; + + /* interlace */ + if (var->vmode & FB_VMODE_INTERLACED) + par->interlace = (1 << 7) | ((u8) (var->yres >> 4)); + else + par->interlace = 0; + + if (var->vmode & FB_VMODE_DOUBLE) + par->regs.cr09 |= 1 << 7; + + /* overlay */ + par->ovract = ((var->xres + var->right_margin + var->hsync_len + + var->left_margin - 32) | ((var->xres - 32) << 16)); +} + +void i810fb_fill_var_timings(struct fb_var_screeninfo *var) { } + +/** + * i810_get_watermark - gets watermark + * @var: pointer to fb_var_screeninfo + * @par: pointer to i810fb_par structure + * + * DESCRIPTION: + * Gets the required watermark based on + * pixelclock and RAMBUS frequency. + * + * RETURNS: + * watermark + */ +u32 i810_get_watermark(const struct fb_var_screeninfo *var, + struct i810fb_par *par) +{ + struct wm_info *wmark = NULL; + u32 i, size = 0, pixclock, wm_best = 0, min, diff; + + if (par->mem_freq == 100) { + switch (var->bits_per_pixel) { + case 8: + wmark = i810_wm_8_100; + size = ARRAY_SIZE(i810_wm_8_100); + break; + case 16: + wmark = i810_wm_16_100; + size = ARRAY_SIZE(i810_wm_16_100); + break; + case 24: + case 32: + wmark = i810_wm_24_100; + size = ARRAY_SIZE(i810_wm_24_100); + } + } else { + switch(var->bits_per_pixel) { + case 8: + wmark = i810_wm_8_133; + size = ARRAY_SIZE(i810_wm_8_133); + break; + case 16: + wmark = i810_wm_16_133; + size = ARRAY_SIZE(i810_wm_16_133); + break; + case 24: + case 32: + wmark = i810_wm_24_133; + size = ARRAY_SIZE(i810_wm_24_133); + } + } + + pixclock = 1000000/var->pixclock; + min = ~0; + for (i = 0; i < size; i++) { + if (pixclock <= wmark[i].freq) + diff = wmark[i].freq - pixclock; + else + diff = pixclock - wmark[i].freq; + if (diff < min) { + wm_best = wmark[i].wm; + min = diff; + } + } + return wm_best; +} + |