diff options
Diffstat (limited to 'u-boot/board/csb272/csb272.c')
| -rw-r--r-- | u-boot/board/csb272/csb272.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/u-boot/board/csb272/csb272.c b/u-boot/board/csb272/csb272.c new file mode 100644 index 0000000..8b36127 --- /dev/null +++ b/u-boot/board/csb272/csb272.c @@ -0,0 +1,187 @@ +/* + * (C) Copyright 2004 + * Tolunay Orkun, Nextio Inc., torkun@nextio.com + * + * 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/processor.h> +#include <i2c.h> +#include <miiphy.h> +#include <asm/ppc4xx-emac.h> + +void sdram_init(void); + +/* + * Configuration data for AMIS FS6377-01 Programmable 3-PLL Clock Generator + * + * CLKA output => Epson LCD Controller + * CLKB output => Not Connected + * CLKC output => Ethernet + * CLKD output => UART external clock + * + * Note: these values are obtained from device after init by micromonitor +*/ +uchar pll_fs6377_regs[16] = { + 0x28, 0xef, 0x53, 0x03, 0x4b, 0x80, 0x32, 0x80, + 0x94, 0x32, 0x80, 0xd4, 0x56, 0xf6, 0xf6, 0xe0 }; + +/* + * pll_init: Initialize AMIS IC FS6377-01 PLL + * + * PLL supplies Epson LCD Clock, Ethernet Clock and UART external clock + * + */ +int pll_init(void) +{ + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + + return i2c_write(CONFIG_SYS_I2C_PLL_ADDR, 0, 1, + (uchar *) pll_fs6377_regs, sizeof(pll_fs6377_regs)); +} + +/* + * board_early_init_f: do early board initialization + * + */ +int board_early_init_f(void) +{ + /* initialize PLL so UART, LCD, Ethernet clocked at correctly */ + (void) get_clocks(); + pll_init(); + + /*-------------------------------------------------------------------------+ + | Interrupt controller setup for the Walnut board. + | Note: IRQ 0-15 405GP internally generated; active high; level sensitive + | IRQ 16 405GP internally generated; active low; level sensitive + | IRQ 17-24 RESERVED + | IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive + | IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive + | IRQ 27 (EXT IRQ 2) Not Used + | IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive + | IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive + | IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive + | IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive + | Note for Walnut board: + | An interrupt taken for the FPGA (IRQ 25) indicates that either + | the Mouse, Keyboard, IRDA, or External Expansion caused the + | interrupt. The FPGA must be read to determine which device + | caused the interrupt. The default setting of the FPGA clears + | + +-------------------------------------------------------------------------*/ + + mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */ + mtdcr (UIC0ER, 0x00000000); /* disable all ints */ + mtdcr (UIC0CR, 0x00000000); /* set all to be non-critical */ + mtdcr (UIC0PR, 0xFFFFFF83); /* set int polarities */ + mtdcr (UIC0TR, 0x10000000); /* set int trigger levels */ + mtdcr (UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */ + mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */ + + mtebc (EBC0_CFG, 0xa8400000); /* EBC always driven */ + + return 0; /* success */ +} + +/* + * checkboard: identify/verify the board we are running + * + * Remark: we just assume it is correct board here! + * + */ +int checkboard(void) +{ + printf("BOARD: Cogent CSB272\n"); + + return 0; /* success */ +} + +/* + * initram: Determine the size of mounted DRAM + * + * Size is determined by reading SDRAM configuration registers as + * configured by initialization code + * + */ +phys_size_t initdram (int board_type) +{ + ulong tot_size; + ulong bank_size; + ulong tmp; + + /* + * ToDo: Move the asm init routine sdram_init() to this C file, + * or even better use some common ppc4xx code available + * in arch/powerpc/cpu/ppc4xx + */ + sdram_init(); + + tot_size = 0; + + mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR); + tmp = mfdcr (SDRAM0_CFGDATA); + if (tmp & 0x00000001) { + bank_size = 0x00400000 << ((tmp >> 17) & 0x7); + tot_size += bank_size; + } + + mtdcr (SDRAM0_CFGADDR, SDRAM0_B1CR); + tmp = mfdcr (SDRAM0_CFGDATA); + if (tmp & 0x00000001) { + bank_size = 0x00400000 << ((tmp >> 17) & 0x7); + tot_size += bank_size; + } + + mtdcr (SDRAM0_CFGADDR, SDRAM0_B2CR); + tmp = mfdcr (SDRAM0_CFGDATA); + if (tmp & 0x00000001) { + bank_size = 0x00400000 << ((tmp >> 17) & 0x7); + tot_size += bank_size; + } + + mtdcr (SDRAM0_CFGADDR, SDRAM0_B3CR); + tmp = mfdcr (SDRAM0_CFGDATA); + if (tmp & 0x00000001) { + bank_size = 0x00400000 << ((tmp >> 17) & 0x7); + tot_size += bank_size; + } + + return tot_size; +} + +/* + * last_stage_init: final configurations (such as PHY etc) + * + */ +int last_stage_init(void) +{ + /* initialize the PHY */ + miiphy_reset("ppc_4xx_eth0", CONFIG_PHY_ADDR); + + /* AUTO neg */ + miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_BMCR, + BMCR_ANENABLE | BMCR_ANRESTART); + + /* LEDs */ + miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_NWAYTEST, 0x0d08); + + + return 0; /* success */ +} |