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1 | /* |
2 | * Driver for AMBA PrimeCell CLCD | |
3 | * | |
4 | * Copyright (C) 2009 Alessandro Rubini | |
5 | * | |
6 | * See file CREDITS for list of people who contributed to this | |
7 | * project. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of | |
12 | * the License, or (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
22 | * MA 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #include <common.h> | |
26 | #include <asm/io.h> | |
27 | #include <lcd.h> | |
28 | #include <amba_clcd.h> | |
29 | ||
30 | /* These variables are required by lcd.c -- although it sets them by itself */ | |
31 | int lcd_line_length; | |
32 | int lcd_color_fg; | |
33 | int lcd_color_bg; | |
34 | void *lcd_base; | |
35 | void *lcd_console_address; | |
36 | short console_col; | |
37 | short console_row; | |
38 | ||
39 | /* | |
40 | * To use this driver you need to provide the following in board files: | |
41 | * a panel_info definition | |
42 | * an lcd_enable function (can't define a weak default with current code) | |
43 | */ | |
44 | ||
45 | /* There is nothing to do with color registers, we use true color */ | |
46 | void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) | |
47 | { | |
48 | return; | |
49 | } | |
50 | ||
51 | /* Low level initialization of the logic cell: depends on panel_info */ | |
52 | void lcd_ctrl_init(void *lcdbase) | |
53 | { | |
54 | struct clcd_config *config; | |
55 | struct clcd_registers *regs; | |
56 | u32 cntl; | |
57 | ||
58 | config = panel_info.priv; | |
59 | regs = config->address; | |
60 | cntl = config->cntl & ~CNTL_LCDEN; | |
61 | ||
62 | /* Lazily, just copy the registers over: first control with disable */ | |
63 | writel(cntl, ®s->cntl); | |
64 | ||
65 | writel(config->tim0, ®s->tim0); | |
66 | writel(config->tim1, ®s->tim1); | |
67 | writel(config->tim2, ®s->tim2); | |
68 | writel(config->tim3, ®s->tim3); | |
69 | writel((u32)lcdbase, ®s->ubas); | |
70 | /* finally, enable */ | |
71 | writel(cntl | CNTL_LCDEN, ®s->cntl); | |
72 | } | |
73 | ||
74 | /* This is trivial, and copied from atmel_lcdfb.c */ | |
75 | ulong calc_fbsize(void) | |
76 | { | |
77 | return ((panel_info.vl_col * panel_info.vl_row * | |
78 | NBITS(panel_info.vl_bpix)) / 8) + PAGE_SIZE; | |
79 | } |