/* * (C) Copyright 2002 * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.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 #include #include #include #ifdef CONFIG_SDRAM_BANK0 #define MAGIC0 0x00000000 #define MAGIC1 0x11111111 #define MAGIC2 0x22222222 #define MAGIC3 0x33333333 #define MAGIC4 0x44444444 #define MAGIC5 0x55555555 #define MAGIC6 0x66666666 #define ADDR_ZERO 0x00000000 #define ADDR_400 0x00000400 #define ADDR_01MB 0x00100000 #define ADDR_08MB 0x00800000 #define ADDR_16MB 0x01000000 #define ADDR_32MB 0x02000000 #define ADDR_64MB 0x04000000 #define ADDR_128MB 0x08000000 #define mtsdram0(reg, data) mtdcr(memcfga,reg);mtdcr(memcfgd,data) /*----------------------------------------------------------------------- */ void sdram_init(void) { ulong speed; ulong sdtr1; ulong rtr; /* * Determine SDRAM speed */ speed = get_bus_freq(0); /* parameter not used on ppc4xx */ /* * Support for 100MHz and 133MHz SDRAM */ if (speed > 100000000) { /* * 133 MHz SDRAM */ sdtr1 = 0x01074015; rtr = 0x07f00000; } else { /* * default: 100 MHz SDRAM */ sdtr1 = 0x0086400d; rtr = 0x05f00000; } /* * Set MB0CF for bank 0. (0-128MB) Address Mode 3 since 13x10(4) */ mtsdram0(mem_mb0cf, 0x000A4001); mtsdram0(mem_sdtr1, sdtr1); mtsdram0(mem_rtr, rtr); /* * Wait for 200us */ udelay(200); /* * Set memory controller options reg, MCOPT1. * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst * read/prefetch. */ mtsdram0(mem_mcopt1, 0x80800000); /* * Wait for 10ms */ udelay(10000); /* * Test if 128 MByte are equipped (mirror test) */ *(volatile ulong *)ADDR_ZERO = MAGIC0; *(volatile ulong *)ADDR_08MB = MAGIC1; *(volatile ulong *)ADDR_16MB = MAGIC2; *(volatile ulong *)ADDR_32MB = MAGIC3; *(volatile ulong *)ADDR_64MB = MAGIC4; if ((*(volatile ulong *)ADDR_ZERO == MAGIC0) && (*(volatile ulong *)ADDR_08MB == MAGIC1) && (*(volatile ulong *)ADDR_16MB == MAGIC2) && (*(volatile ulong *)ADDR_32MB == MAGIC3)) { /* * OK, 128MB detected -> all done */ return; } /* * Now test for 64 MByte... */ /* * Disable memory controller. */ mtsdram0(mem_mcopt1, 0x00000000); /* * Set MB0CF for bank 0. (0-64MB) Address Mode 3 since 13x9(4) */ mtsdram0(mem_mb0cf, 0x00084001); mtsdram0(mem_sdtr1, sdtr1); mtsdram0(mem_rtr, rtr); /* * Wait for 200us */ udelay(200); /* * Set memory controller options reg, MCOPT1. * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst * read/prefetch. */ mtsdram0(mem_mcopt1, 0x80800000); /* * Wait for 10ms */ udelay(10000); /* * Test if 64 MByte are equipped (mirror test) */ *(volatile ulong *)ADDR_ZERO = MAGIC0; *(volatile ulong *)ADDR_08MB = MAGIC1; *(volatile ulong *)ADDR_16MB = MAGIC2; *(volatile ulong *)ADDR_32MB = MAGIC3; if ((*(volatile ulong *)ADDR_ZERO == MAGIC0) && (*(volatile ulong *)ADDR_08MB == MAGIC1) && (*(volatile ulong *)ADDR_16MB == MAGIC2)) { /* * OK, 64MB detected -> all done */ return; } /* * Now test for 32 MByte... */ /* * Disable memory controller. */ mtsdram0(mem_mcopt1, 0x00000000); /* * Set MB0CF for bank 0. (0-32MB) Address Mode 2 since 12x9(4) */ mtsdram0(mem_mb0cf, 0x00062001); /* * Set memory controller options reg, MCOPT1. * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst * read/prefetch. */ mtsdram0(mem_mcopt1, 0x80800000); /* * Wait for 10ms */ udelay(10000); /* * Test if 32 MByte are equipped (mirror test) */ *(volatile ulong *)ADDR_ZERO = MAGIC0; *(volatile ulong *)ADDR_400 = MAGIC1; *(volatile ulong *)ADDR_08MB = MAGIC2; *(volatile ulong *)ADDR_16MB = MAGIC3; if ((*(volatile ulong *)ADDR_ZERO == MAGIC0) && (*(volatile ulong *)ADDR_400 == MAGIC1) && (*(volatile ulong *)ADDR_08MB == MAGIC2)) { /* * OK, 32MB detected -> all done */ return; } /* * Now test for 16 MByte... */ /* * Disable memory controller. */ mtsdram0(mem_mcopt1, 0x00000000); /* * Set MB0CF for bank 0. (0-16MB) Address Mode 4 since 12x8(4) */ mtsdram0(mem_mb0cf, 0x00046001); /* * Set memory controller options reg, MCOPT1. * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst * read/prefetch. */ mtsdram0(mem_mcopt1, 0x80800000); /* * Wait for 10ms */ udelay(10000); /* * Test if 16 MByte are equipped (mirror test) */ *(volatile ulong *)ADDR_ZERO = MAGIC0; *(volatile ulong *)ADDR_400 = MAGIC1; *(volatile ulong *)ADDR_01MB = MAGIC5; *(volatile ulong *)ADDR_08MB = MAGIC2; /* *(volatile ulong *)ADDR_16MB = MAGIC3;*/ if ((*(volatile ulong *)ADDR_ZERO == MAGIC0) && (*(volatile ulong *)ADDR_400 == MAGIC1) && (*(volatile ulong *)ADDR_01MB == MAGIC5) && (*(volatile ulong *)ADDR_08MB == MAGIC2)) { /* * OK, 16MB detected -> all done */ return; } /* * Setup for 4 MByte... */ /* * Disable memory controller. */ mtsdram0(mem_mcopt1, 0x00000000); /* * Set MB0CF for bank 0. (0-4MB) Address Mode 5 since 11x8(2) */ mtsdram0(mem_mb0cf, 0x00008001); /* * Set memory controller options reg, MCOPT1. * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst * read/prefetch. */ mtsdram0(mem_mcopt1, 0x80800000); /* * Wait for 10ms */ udelay(10000); } #endif /* CONFIG_SDRAM_BANK0 */