diff options
Diffstat (limited to 'board/cradle/cradle.c')
| -rw-r--r-- | board/cradle/cradle.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/board/cradle/cradle.c b/board/cradle/cradle.c new file mode 100644 index 0000000..f599a31 --- /dev/null +++ b/board/cradle/cradle.c @@ -0,0 +1,227 @@ +/* + * (C) Copyright 2002 + * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.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 + */ + +#include <asm/arch/pxa-regs.h> +#include <common.h> + +/* ------------------------------------------------------------------------- */ + + +/* local prototypes */ +void set_led (int led, int color); +void error_code_halt (int code); +int init_sio (int led, unsigned long base); +inline void cradle_outb (unsigned short val, unsigned long base, + unsigned long reg); +inline unsigned char cradle_inb (unsigned long base, unsigned long reg); +inline void sleep (int i); + +inline void +/**********************************************************/ +sleep (int i) +/**********************************************************/ +{ + while (i--) { + udelay (1000000); + } +} + +void +/**********************************************************/ +error_code_halt (int code) +/**********************************************************/ +{ + while (1) { + led_code (code, RED); + sleep (1); + led_code (0, OFF); + sleep (1); + } +} + +void +/**********************************************************/ +led_code (int code, int color) +/**********************************************************/ +{ + int i; + + code &= 0xf; /* only 4 leds */ + + for (i = 0; i < 4; i++) { + if (code & (1 << i)) { + set_led (i, color); + } else { + set_led (i, OFF); + } + } +} + +void +/**********************************************************/ +set_led (int led, int color) +/**********************************************************/ +{ + int shift = led * 2; + unsigned long mask = 0x3 << shift; + + CRADLE_LED_CLR_REG = mask; /* clear bits */ + CRADLE_LED_SET_REG = (color << shift); /* set bits */ + udelay (5000); +} + +inline void +/**********************************************************/ +cradle_outb (unsigned short val, unsigned long base, unsigned long reg) +/**********************************************************/ +{ + *(volatile unsigned short *) (base + (reg * 2)) = val; +} + +inline unsigned char +/**********************************************************/ +cradle_inb (unsigned long base, unsigned long reg) +/**********************************************************/ +{ + unsigned short val; + + val = *(volatile unsigned short *) (base + (reg * 2)); + return (val & 0xff); +} + +int +/**********************************************************/ +init_sio (int led, unsigned long base) +/**********************************************************/ +{ + unsigned char val; + + set_led (led, YELLOW); + val = cradle_inb (base, CRADLE_SIO_INDEX); + val = cradle_inb (base, CRADLE_SIO_INDEX); + if (val != 0) { + set_led (led, RED); + return -1; + } + + /* map SCC2 to COM1 */ + cradle_outb (0x01, base, CRADLE_SIO_INDEX); + cradle_outb (0x00, base, CRADLE_SIO_DATA); + + /* enable SCC2 extended regs */ + cradle_outb (0x40, base, CRADLE_SIO_INDEX); + cradle_outb (0xa0, base, CRADLE_SIO_DATA); + + /* enable SCC2 clock multiplier */ + cradle_outb (0x51, base, CRADLE_SIO_INDEX); + cradle_outb (0x04, base, CRADLE_SIO_DATA); + + /* enable SCC2 */ + cradle_outb (0x00, base, CRADLE_SIO_INDEX); + cradle_outb (0x04, base, CRADLE_SIO_DATA); + + /* map SCC2 DMA to channel 0 */ + cradle_outb (0x4f, base, CRADLE_SIO_INDEX); + cradle_outb (0x09, base, CRADLE_SIO_DATA); + + /* read ID from SIO to check operation */ + cradle_outb (0xe4, base, 0x3f8 + 0x3); + val = cradle_inb (base, 0x3f8 + 0x0); + if ((val & 0xf0) != 0x20) { + set_led (led, RED); + /* disable SCC2 */ + cradle_outb (0, base, CRADLE_SIO_INDEX); + cradle_outb (0, base, CRADLE_SIO_DATA); + return -1; + } + /* set back to bank 0 */ + cradle_outb (0, base, 0x3f8 + 0x3); + set_led (led, GREEN); + return 0; +} + +/* + * Miscelaneous platform dependent initialisations + */ + +int +/**********************************************************/ +board_post_init (void) +/**********************************************************/ +{ + return (0); +} + +int +/**********************************************************/ +board_init (void) +/**********************************************************/ +{ + DECLARE_GLOBAL_DATA_PTR; + + led_code (0xf, YELLOW); + + /* arch number of HHP Cradle */ + gd->bd->bi_arch_number = 174; + + /* adress of boot parameters */ + gd->bd->bi_boot_params = 0xa0000100; + + /* Init SIOs to enable SCC2 */ + udelay (100000); /* delay makes it look neat */ + init_sio (0, CRADLE_SIO1_PHYS); + udelay (100000); + init_sio (1, CRADLE_SIO2_PHYS); + udelay (100000); + init_sio (2, CRADLE_SIO3_PHYS); + udelay (100000); + set_led (3, GREEN); + + return 1; +} + +int +/**********************************************************/ +dram_init (void) +/**********************************************************/ +{ + DECLARE_GLOBAL_DATA_PTR; + + gd->bd->bi_dram[0].start = PHYS_SDRAM_1; + gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE; + gd->bd->bi_dram[1].start = PHYS_SDRAM_2; + gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE; + gd->bd->bi_dram[2].start = PHYS_SDRAM_3; + gd->bd->bi_dram[2].size = PHYS_SDRAM_3_SIZE; + gd->bd->bi_dram[3].start = PHYS_SDRAM_4; + gd->bd->bi_dram[3].size = PHYS_SDRAM_4_SIZE; + + return (PHYS_SDRAM_1_SIZE + + PHYS_SDRAM_2_SIZE + + PHYS_SDRAM_3_SIZE + + PHYS_SDRAM_4_SIZE ); +} |