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path: root/drivers/video/i810/i810_gtf.c
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Diffstat (limited to 'drivers/video/i810/i810_gtf.c')
-rw-r--r--drivers/video/i810/i810_gtf.c275
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 000000000000..64f087a4466b
--- /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;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 18:32:06 +0000