diff options
Diffstat (limited to 'drivers/video/amba.c')
| -rw-r--r-- | drivers/video/amba.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/video/amba.c b/drivers/video/amba.c new file mode 100644 index 0000000000..ffa1c399e1 --- /dev/null +++ b/drivers/video/amba.c @@ -0,0 +1,79 @@ +/* + * Driver for AMBA PrimeCell CLCD + * + * Copyright (C) 2009 Alessandro Rubini + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <lcd.h> +#include <amba_clcd.h> + +/* These variables are required by lcd.c -- although it sets them by itself */ +int lcd_line_length; +int lcd_color_fg; +int lcd_color_bg; +void *lcd_base; +void *lcd_console_address; +short console_col; +short console_row; + +/* + * To use this driver you need to provide the following in board files: + * a panel_info definition + * an lcd_enable function (can't define a weak default with current code) + */ + +/* There is nothing to do with color registers, we use true color */ +void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) +{ + return; +} + +/* Low level initialization of the logic cell: depends on panel_info */ +void lcd_ctrl_init(void *lcdbase) +{ + struct clcd_config *config; + struct clcd_registers *regs; + u32 cntl; + + config = panel_info.priv; + regs = config->address; + cntl = config->cntl & ~CNTL_LCDEN; + + /* Lazily, just copy the registers over: first control with disable */ + writel(cntl, ®s->cntl); + + writel(config->tim0, ®s->tim0); + writel(config->tim1, ®s->tim1); + writel(config->tim2, ®s->tim2); + writel(config->tim3, ®s->tim3); + writel((u32)lcdbase, ®s->ubas); + /* finally, enable */ + writel(cntl | CNTL_LCDEN, ®s->cntl); +} + +/* This is trivial, and copied from atmel_lcdfb.c */ +ulong calc_fbsize(void) +{ + return ((panel_info.vl_col * panel_info.vl_row * + NBITS(panel_info.vl_bpix)) / 8) + PAGE_SIZE; +} |