diff options
Diffstat (limited to 'cpu/arm926ejs/at91sam926x/lcd.c')
| -rw-r--r-- | cpu/arm926ejs/at91sam926x/lcd.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/cpu/arm926ejs/at91sam926x/lcd.c b/cpu/arm926ejs/at91sam926x/lcd.c new file mode 100644 index 00000000000..affb6be01b0 --- /dev/null +++ b/cpu/arm926ejs/at91sam926x/lcd.c @@ -0,0 +1,279 @@ +/* + * (C) Copyright 2005 + * M. Amine SAYA, ATMEL Rousset, France. + * Added support to AT91SAM9261 LCD Controller + * + * (C) Copyright 2001-2002 + * Wolfgang Denk, DENX Software Engineering -- wd@denx.de + * + * 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 + */ + +/************************************************************************/ +/* ** HEADER FILES */ +/************************************************************************/ + +#include <config.h> +#include <common.h> +#include <version.h> +#include <stdarg.h> +#include <linux/types.h> +#include <devices.h> + +#undef CONFIG_LCD_LOGO +#include <lcd.h> +#include "lcd_lut.h" + + +#ifdef CONFIG_LCD +//#include <asm/arch/pio.h> + +#define LCD_BPP LCD_COLOR8 + +/* #define DEBUG */ +#define FB_SYNC_HOR_HIGH_ACT 1 /* horizontal sync high active */ +#define FB_SYNC_VERT_HIGH_ACT 2 /* vertical sync high active */ + +/* More or less configurable parameters for LCDC controller*/ +#define SIDSAFB_FIFO_SIZE 512 +#define SIDSAFB_DMA_BURST_LEN 16 +#define SIDSAFB_CRST_VAL 0xc8 /* 0xda */ + + +AT91PS_SYS AT91_SYS = (AT91PS_SYS)AT91C_BASE_SYS; + +/* 640x480x16 @ 61 Hz */ +vidinfo_t panel_info = { + vl_col: 240, + vl_row: 320, + vl_width: 64, + vl_height: 86, + vl_pixclock: 4965000, + vl_hsp: FB_SYNC_HOR_HIGH_ACT, + vl_vsp: FB_SYNC_VERT_HIGH_ACT, + vl_bpix: 3, + vl_tft: 1, + /* Horizontal control Timing */ + vl_hpw: 5, + vl_blw: 1, + vl_elw: 33, + /* Vertical control Timing */ + vl_vpw: 1, + vl_bfw: 1, + vl_efw: 0, +}; + + + + +/*----------------------------------------------------------------------*/ +void lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue); +void lcd_ctrl_init (void *lcdbase); +void lcd_enable (void); +void lcd_init_lut(void); + + +int lcd_line_length; +int lcd_color_fg; +int lcd_color_bg; + +void *lcd_base; /* Start of framebuffer memory */ +void *lcd_console_address; /* Start of console buffer */ + +short console_col; +short console_row; + + + +/************************************************************************/ +void lcd_init_lut(void) +{ + unsigned int i; + for(i =0; i <256; i++) { +#if defined(CONFIG_AT91SAM9261EK) || defined(CONFIG_AT91SAM9263EK) + panel_info.controller.lcdc->LCDC_LUT_ENTRY[i] = + ((rgbPalette[i].red) >> 3 | + ((rgbPalette[i].green & 0xf8) << 2) | + ((rgbPalette[i].blue & 0xf8) << 7)); +#else + panel_info.controller.lcdc->LCDC_LUT_ENTRY[i] = + ((rgbPalette[i].blue) >> 3 | + ((rgbPalette[i].green & 0xfc) << 3) | + ((rgbPalette[i].red & 0xf8) << 8)); +#endif + } +} + + +void lcd_setcolreg (ushort regno, ushort red, + ushort green, ushort blue) +{ +#if defined(CONFIG_AT91SAM9261EK) || defined(CONFIG_AT91SAM9263EK) + panel_info.controller.lcdc->LCDC_LUT_ENTRY[regno] = ((red >> 3) | + ((green & 0xf8) << 2) | + ((blue & 0xf8) << 7)); +#else + panel_info.controller.lcdc->LCDC_LUT_ENTRY[regno] = ((blue >> 3) | + ((green & 0xfc) << 3) | + ((red & 0xf8) << 8)); +#endif +} + + +void lcd_ctrl_init (void *lcdbase) +{ + unsigned long value; + + AT91F_LCDC_TFT_CfgPIO(); + +#ifdef CONFIG_AT91SAM9261EK + /* Enable HCLOCK in PMC */ + *AT91C_PMC_SCER = AT91C_PMC_HCK1; +#endif + +#ifdef CONFIG_AT91SAM9263EK + /* Enable LCDC clock in PMC */ + *AT91C_PMC_PCER = 1 << AT91C_ID_LCDC; +#endif +#ifdef CONFIG_AT91SAM9RLEK + /* Enable LCDC clock in PMC */ + *AT91C_PMC_PCER = 1 << AT91C_ID_LCDC; +#endif + /* Init controller field in panel_info */ + panel_info.controller.lcdc = (AT91PS_LCDC) AT91C_BASE_LCDC; + panel_info.controller.frame_buffer = (unsigned long) lcdbase; + + /* Turn off the LCD controller and the DMA controller */ + panel_info.controller.lcdc->LCDC_PWRCON = 0x00; + panel_info.controller.lcdc->LCDC_DMACON = 0; + + /* Reset LCDC DMA */ + panel_info.controller.lcdc->LCDC_DMACON = AT91C_LCDC_DMARST; + + /* ...set frame size and burst length = 8 words (?) */ + value = ((unsigned int)panel_info.vl_row * (unsigned int)panel_info.vl_col * (unsigned int)NBITS(panel_info.vl_bpix)) / 32; + value |= ((512 - 1) << 24); + panel_info.controller.lcdc->LCDC_FRMCFG = value; + + /* Set pixel clock */ + value = AT91C_MASTER_CLOCK / panel_info.vl_pixclock; + + if (AT91C_MASTER_CLOCK % panel_info.vl_pixclock) + value++; + + value = (value / 2) - 1; + + if (!value) { + panel_info.controller.lcdc->LCDC_LCDCON1 = AT91C_LCDC_BYPASS; + } else + panel_info.controller.lcdc->LCDC_LCDCON1 = value << 12; + + /* Initialize control register 2 */ + if (panel_info.vl_tft) + value = ( AT91C_LCDC_MEMOR_LITTLEIND | AT91C_LCDC_DISTYPE_TFT | AT91C_LCDC_CLKMOD); + else + value = ( AT91C_LCDC_MEMOR_LITTLEIND | AT91C_LCDC_CLKMOD); + + if (!((unsigned int)panel_info.vl_hsp & FB_SYNC_HOR_HIGH_ACT)) + value |= 1 << 10; /* INVLINE */ + if (!((unsigned int)panel_info.vl_vsp & FB_SYNC_VERT_HIGH_ACT)) + value |= 1 << 9; /* INVFRAME */ + + value |= (unsigned int)(panel_info.vl_bpix << 5); + + panel_info.controller.lcdc->LCDC_LCDCON2 = value; + + /* Vertical timing */ + value = (unsigned int)((panel_info.vl_vpw - 1) << 16); + value |= (unsigned int)(panel_info.vl_bfw << 8); + value |= (unsigned int)panel_info.vl_efw; + panel_info.controller.lcdc->LCDC_TIM1 = value; + + /* Horizontal timing */ + value = (unsigned int)((panel_info.vl_elw - 1) << 21); + value |= (unsigned int)((panel_info.vl_hpw - 1) << 8); + value |= (unsigned int)(panel_info.vl_blw - 1); + + panel_info.controller.lcdc->LCDC_TIM2 = value; + + value = (unsigned int)((panel_info.vl_col - 1) << 21); + value |= (unsigned int)(panel_info.vl_row - 1); + + panel_info.controller.lcdc->LCDC_LCDFRCFG = value; + + /* FIFO Threshold: Use formula from data sheet */ + value = SIDSAFB_FIFO_SIZE - (2 * SIDSAFB_DMA_BURST_LEN + 3); + panel_info.controller.lcdc->LCDC_FIFO = value; + + /* Toggle LCD_MODE every frame */ + value = 0; + panel_info.controller.lcdc->LCDC_MVAL = value; + + /* Disable all interrupts */ + panel_info.controller.lcdc->LCDC_IDR = ~0UL; + /* Set contrast */ + value = AT91C_LCDC_PS_DIVIDEDBYEIGHT | AT91C_LCDC_POL_POSITIVEPULSE | AT91C_LCDC_ENA_PWMGEMENABLED; + panel_info.controller.lcdc->LCDC_CTRSTCON = value; + panel_info.controller.lcdc->LCDC_CTRSTVAL = 0xDA; /*SIDSAFB_CRST_VAL;*/ + + panel_info.controller.lcdc->LCDC_BA1 = (unsigned int)lcdbase; + panel_info.controller.lcdc->LCDC_FRMCFG = (15 << 24) + ((unsigned int)panel_info.vl_col * (unsigned int)panel_info.vl_row * (unsigned int)NBITS(panel_info.vl_bpix)) / 32; + panel_info.controller.lcdc->LCDC_DMACON = AT91C_LCDC_DMAEN; + panel_info.controller.lcdc->LCDC_PWRCON = AT91C_LCDC_PWR | 0x0C; +} + + +/*----------------------------------------------------------------------*/ +void lcd_enable (void) +{ +#ifdef CONFIG_AT91SAM9261EK + *AT91C_PIOA_SODR = AT91C_PIO_PA12; +#endif + +#ifdef CONFIG_AT91SAM9263EK + *AT91C_PIOD_SODR = AT91C_PIO_PD12; +#endif +} + +/*----------------------------------------------------------------------*/ +void lcd_disable (void) +{ +#ifdef CONFIG_AT91SAM9261EK + *AT91C_PIOA_CODR = AT91C_PIO_PA12; +#endif + +#ifdef CONFIG_AT91SAM9263EK + *AT91C_PIOD_CODR = AT91C_PIO_PD12; +#endif +} + +/*----------------------------------------------------------------------*/ + +ulong calc_fbsize (void) +{ + ulong size; + int line_length = ((unsigned int)panel_info.vl_col * (unsigned int)NBITS(panel_info.vl_bpix)) / 8; + + size = line_length * (unsigned int)panel_info.vl_row; + size += PAGE_SIZE; + + return size; +} + +#endif /* CONFIG_LCD */ |