1 /*-*- linux-c -*-
2 * linux/drivers/video/i810_main.h -- Intel 810 Non-discrete Video Timings
3 * (VESA GTF)
4 *
5 * Copyright (C) 2001 Antonino Daplas<adaplas@pol.net>
6 * All Rights Reserved
7 *
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive for
11 * more details.
12 */
13 #include <linux/kernel.h>
14
15 #include "i810_regs.h"
16 #include "i810.h"
17 #include "i810_main.h"
18
19 /*
20 * FIFO and Watermark tables - based almost wholly on i810_wmark.c in
21 * XFree86 v4.03 by Precision Insight. Slightly modified for integer
22 * operation, instead of float
23 */
24
25 struct wm_info {
26 u32 freq;
27 u32 wm;
28 };
29
30 static struct wm_info i810_wm_8_100[] = {
31 { 15, 0x0070c000 }, { 19, 0x0070c000 }, { 25, 0x22003000 },
32 { 28, 0x22003000 }, { 31, 0x22003000 }, { 36, 0x22007000 },
33 { 40, 0x22007000 }, { 45, 0x22007000 }, { 49, 0x22008000 },
34 { 50, 0x22008000 }, { 56, 0x22008000 }, { 65, 0x22008000 },
35 { 75, 0x22008000 }, { 78, 0x22008000 }, { 80, 0x22008000 },
36 { 94, 0x22008000 }, { 96, 0x22107000 }, { 99, 0x22107000 },
37 { 108, 0x22107000 }, { 121, 0x22107000 }, { 128, 0x22107000 },
38 { 132, 0x22109000 }, { 135, 0x22109000 }, { 157, 0x2210b000 },
39 { 162, 0x2210b000 }, { 175, 0x2210b000 }, { 189, 0x2220e000 },
40 { 195, 0x2220e000 }, { 202, 0x2220e000 }, { 204, 0x2220e000 },
41 { 218, 0x2220f000 }, { 229, 0x22210000 }, { 234, 0x22210000 },
42 };
43
44 static struct wm_info i810_wm_16_100[] = {
45 { 15, 0x0070c000 }, { 19, 0x0020c000 }, { 25, 0x22006000 },
46 { 28, 0x22006000 }, { 31, 0x22007000 }, { 36, 0x22007000 },
47 { 40, 0x22007000 }, { 45, 0x22007000 }, { 49, 0x22009000 },
48 { 50, 0x22009000 }, { 56, 0x22108000 }, { 65, 0x2210e000 },
49 { 75, 0x2210e000 }, { 78, 0x2210e000 }, { 80, 0x22210000 },
50 { 94, 0x22210000 }, { 96, 0x22210000 }, { 99, 0x22210000 },
51 { 108, 0x22210000 }, { 121, 0x22210000 }, { 128, 0x22210000 },
52 { 132, 0x22314000 }, { 135, 0x22314000 }, { 157, 0x22415000 },
53 { 162, 0x22416000 }, { 175, 0x22416000 }, { 189, 0x22416000 },
54 { 195, 0x22416000 }, { 202, 0x22416000 }, { 204, 0x22416000 },
55 { 218, 0x22416000 }, { 229, 0x22416000 },
56 };
57
58 static struct wm_info i810_wm_24_100[] = {
59 { 15, 0x0020c000 }, { 19, 0x0040c000 }, { 25, 0x22009000 },
60 { 28, 0x22009000 }, { 31, 0x2200a000 }, { 36, 0x2210c000 },
61 { 40, 0x2210c000 }, { 45, 0x2210c000 }, { 49, 0x22111000 },
62 { 50, 0x22111000 }, { 56, 0x22111000 }, { 65, 0x22214000 },
63 { 75, 0x22214000 }, { 78, 0x22215000 }, { 80, 0x22216000 },
64 { 94, 0x22218000 }, { 96, 0x22418000 }, { 99, 0x22418000 },
65 { 108, 0x22418000 }, { 121, 0x22418000 }, { 128, 0x22419000 },
66 { 132, 0x22519000 }, { 135, 0x4441d000 }, { 157, 0x44419000 },
67 { 162, 0x44419000 }, { 175, 0x44419000 }, { 189, 0x44419000 },
68 { 195, 0x44419000 }, { 202, 0x44419000 }, { 204, 0x44419000 },
69 };
70
71 static struct wm_info i810_wm_8_133[] = {
72 { 15, 0x0070c000 }, { 19, 0x0070c000 }, { 25, 0x22003000 },
73 { 28, 0x22003000 }, { 31, 0x22003000 }, { 36, 0x22007000 },
74 { 40, 0x22007000 }, { 45, 0x22007000 }, { 49, 0x22008000 },
75 { 50, 0x22008000 }, { 56, 0x22008000 }, { 65, 0x22008000 },
76 { 75, 0x22008000 }, { 78, 0x22008000 }, { 80, 0x22008000 },
77 { 94, 0x22008000 }, { 96, 0x22107000 }, { 99, 0x22107000 },
78 { 108, 0x22107000 }, { 121, 0x22107000 }, { 128, 0x22107000 },
79 { 132, 0x22109000 }, { 135, 0x22109000 }, { 157, 0x2210b000 },
80 { 162, 0x2210b000 }, { 175, 0x2210b000 }, { 189, 0x2220e000 },
81 { 195, 0x2220e000 }, { 202, 0x2220e000 }, { 204, 0x2220e000 },
82 { 218, 0x2220f000 }, { 229, 0x22210000 }, { 234, 0x22210000 },
83 };
84
85 static struct wm_info i810_wm_16_133[] = {
86 { 15, 0x0020c000 }, { 19, 0x0020c000 }, { 25, 0x22006000 },
87 { 28, 0x22006000 }, { 31, 0x22007000 }, { 36, 0x22007000 },
88 { 40, 0x22007000 }, { 45, 0x22007000 }, { 49, 0x22009000 },
89 { 50, 0x22009000 }, { 56, 0x22108000 }, { 65, 0x2210e000 },
90 { 75, 0x2210e000 }, { 78, 0x2210e000 }, { 80, 0x22210000 },
91 { 94, 0x22210000 }, { 96, 0x22210000 }, { 99, 0x22210000 },
92 { 108, 0x22210000 }, { 121, 0x22210000 }, { 128, 0x22210000 },
93 { 132, 0x22314000 }, { 135, 0x22314000 }, { 157, 0x22415000 },
94 { 162, 0x22416000 }, { 175, 0x22416000 }, { 189, 0x22416000 },
95 { 195, 0x22416000 }, { 202, 0x22416000 }, { 204, 0x22416000 },
96 { 218, 0x22416000 }, { 229, 0x22416000 },
97 };
98
99 static struct wm_info i810_wm_24_133[] = {
100 { 15, 0x0020c000 }, { 19, 0x00408000 }, { 25, 0x22009000 },
101 { 28, 0x22009000 }, { 31, 0x2200a000 }, { 36, 0x2210c000 },
102 { 40, 0x2210c000 }, { 45, 0x2210c000 }, { 49, 0x22111000 },
103 { 50, 0x22111000 }, { 56, 0x22111000 }, { 65, 0x22214000 },
104 { 75, 0x22214000 }, { 78, 0x22215000 }, { 80, 0x22216000 },
105 { 94, 0x22218000 }, { 96, 0x22418000 }, { 99, 0x22418000 },
106 { 108, 0x22418000 }, { 121, 0x22418000 }, { 128, 0x22419000 },
107 { 132, 0x22519000 }, { 135, 0x4441d000 }, { 157, 0x44419000 },
108 { 162, 0x44419000 }, { 175, 0x44419000 }, { 189, 0x44419000 },
109 { 195, 0x44419000 }, { 202, 0x44419000 }, { 204, 0x44419000 },
110 };
111
round_off_xres(u32 * xres)112 void round_off_xres(u32 *xres) { }
round_off_yres(u32 * xres,u32 * yres)113 void round_off_yres(u32 *xres, u32 *yres) { }
114
115 /**
116 * i810fb_encode_registers - encode @var to hardware register values
117 * @var: pointer to var structure
118 * @par: pointer to hardware par structure
119 *
120 * DESCRIPTION:
121 * Timing values in @var will be converted to appropriate
122 * register values of @par.
123 */
i810fb_encode_registers(const struct fb_var_screeninfo * var,struct i810fb_par * par,u32 xres,u32 yres)124 void i810fb_encode_registers(const struct fb_var_screeninfo *var,
125 struct i810fb_par *par, u32 xres, u32 yres)
126 {
127 int n, blank_s, blank_e;
128 u8 __iomem *mmio = par->mmio_start_virtual;
129 u8 msr = 0;
130
131 /* Horizontal */
132 /* htotal */
133 n = ((xres + var->right_margin + var->hsync_len +
134 var->left_margin) >> 3) - 5;
135 par->regs.cr00 = (u8) n;
136 par->regs.cr35 = (u8) ((n >> 8) & 1);
137
138 /* xres */
139 par->regs.cr01 = (u8) ((xres >> 3) - 1);
140
141 /* hblank */
142 blank_e = (xres + var->right_margin + var->hsync_len +
143 var->left_margin) >> 3;
144 blank_e--;
145 blank_s = blank_e - 127;
146 if (blank_s < (xres >> 3))
147 blank_s = xres >> 3;
148 par->regs.cr02 = (u8) blank_s;
149 par->regs.cr03 = (u8) (blank_e & 0x1F);
150 par->regs.cr05 = (u8) ((blank_e & (1 << 5)) << 2);
151 par->regs.cr39 = (u8) ((blank_e >> 6) & 1);
152
153 /* hsync */
154 par->regs.cr04 = (u8) ((xres + var->right_margin) >> 3);
155 par->regs.cr05 |= (u8) (((xres + var->right_margin +
156 var->hsync_len) >> 3) & 0x1F);
157
158 /* Vertical */
159 /* vtotal */
160 n = yres + var->lower_margin + var->vsync_len + var->upper_margin - 2;
161 par->regs.cr06 = (u8) (n & 0xFF);
162 par->regs.cr30 = (u8) ((n >> 8) & 0x0F);
163
164 /* vsync */
165 n = yres + var->lower_margin;
166 par->regs.cr10 = (u8) (n & 0xFF);
167 par->regs.cr32 = (u8) ((n >> 8) & 0x0F);
168 par->regs.cr11 = i810_readb(CR11, mmio) & ~0x0F;
169 par->regs.cr11 |= (u8) ((yres + var->lower_margin +
170 var->vsync_len) & 0x0F);
171
172 /* yres */
173 n = yres - 1;
174 par->regs.cr12 = (u8) (n & 0xFF);
175 par->regs.cr31 = (u8) ((n >> 8) & 0x0F);
176
177 /* vblank */
178 blank_e = yres + var->lower_margin + var->vsync_len +
179 var->upper_margin;
180 blank_e--;
181 blank_s = blank_e - 127;
182 if (blank_s < yres)
183 blank_s = yres;
184 par->regs.cr15 = (u8) (blank_s & 0xFF);
185 par->regs.cr33 = (u8) ((blank_s >> 8) & 0x0F);
186 par->regs.cr16 = (u8) (blank_e & 0xFF);
187 par->regs.cr09 = 0;
188
189 /* sync polarity */
190 if (!(var->sync & FB_SYNC_HOR_HIGH_ACT))
191 msr |= 1 << 6;
192 if (!(var->sync & FB_SYNC_VERT_HIGH_ACT))
193 msr |= 1 << 7;
194 par->regs.msr = msr;
195
196 /* interlace */
197 if (var->vmode & FB_VMODE_INTERLACED)
198 par->interlace = (1 << 7) | ((u8) (var->yres >> 4));
199 else
200 par->interlace = 0;
201
202 if (var->vmode & FB_VMODE_DOUBLE)
203 par->regs.cr09 |= 1 << 7;
204
205 /* overlay */
206 par->ovract = ((var->xres + var->right_margin + var->hsync_len +
207 var->left_margin - 32) | ((var->xres - 32) << 16));
208 }
209
i810fb_fill_var_timings(struct fb_var_screeninfo * var)210 void i810fb_fill_var_timings(struct fb_var_screeninfo *var) { }
211
212 /**
213 * i810_get_watermark - gets watermark
214 * @var: pointer to fb_var_screeninfo
215 * @par: pointer to i810fb_par structure
216 *
217 * DESCRIPTION:
218 * Gets the required watermark based on
219 * pixelclock and RAMBUS frequency.
220 *
221 * RETURNS:
222 * watermark
223 */
i810_get_watermark(const struct fb_var_screeninfo * var,struct i810fb_par * par)224 u32 i810_get_watermark(const struct fb_var_screeninfo *var,
225 struct i810fb_par *par)
226 {
227 struct wm_info *wmark = NULL;
228 u32 i, size = 0, pixclock, wm_best = 0, min, diff;
229
230 if (par->mem_freq == 100) {
231 switch (var->bits_per_pixel) {
232 case 8:
233 wmark = i810_wm_8_100;
234 size = ARRAY_SIZE(i810_wm_8_100);
235 break;
236 case 16:
237 wmark = i810_wm_16_100;
238 size = ARRAY_SIZE(i810_wm_16_100);
239 break;
240 case 24:
241 case 32:
242 wmark = i810_wm_24_100;
243 size = ARRAY_SIZE(i810_wm_24_100);
244 }
245 } else {
246 switch(var->bits_per_pixel) {
247 case 8:
248 wmark = i810_wm_8_133;
249 size = ARRAY_SIZE(i810_wm_8_133);
250 break;
251 case 16:
252 wmark = i810_wm_16_133;
253 size = ARRAY_SIZE(i810_wm_16_133);
254 break;
255 case 24:
256 case 32:
257 wmark = i810_wm_24_133;
258 size = ARRAY_SIZE(i810_wm_24_133);
259 }
260 }
261
262 pixclock = 1000000/var->pixclock;
263 min = ~0;
264 for (i = 0; i < size; i++) {
265 if (pixclock <= wmark[i].freq)
266 diff = wmark[i].freq - pixclock;
267 else
268 diff = pixclock - wmark[i].freq;
269 if (diff < min) {
270 wm_best = wmark[i].wm;
271 min = diff;
272 }
273 }
274 return wm_best;
275 }
276
277