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Diffstat (limited to 'board/netstal/hcu5/sdram.c')
| -rw-r--r-- | board/netstal/hcu5/sdram.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/board/netstal/hcu5/sdram.c b/board/netstal/hcu5/sdram.c new file mode 100644 index 000000000..40391958d --- /dev/null +++ b/board/netstal/hcu5/sdram.c @@ -0,0 +1,302 @@ +/* + * (C) Copyright 2007 + * Niklaus Giger (Niklaus.Giger@netstal.com) + * (C) Copyright 2006 + * Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com + * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com + * Thierry Roman, AMCC/IBM, thierry_roman@fr.ibm.com + * Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com + * Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com + * + * (C) Copyright 2006 + * Stefan Roese, DENX Software Engineering, sr@denx.de. + * + * 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 + */ + +/* define DEBUG for debug output */ +#undef DEBUG + +#include <common.h> +#include <asm/processor.h> +#include <asm/io.h> +#include <asm/mmu.h> +#include <ppc440.h> + +void sysLedSet(u32 value); +void dcbz_area(u32 start_address, u32 num_bytes); +void dflush(void); + +#define DDR_DCR_BASE 0x10 +#define ddrcfga (DDR_DCR_BASE+0x0) /* DDR configuration address reg */ +#define ddrcfgd (DDR_DCR_BASE+0x1) /* DDR configuration data reg */ + +#define DDR0_01_INT_MASK_MASK 0x000000FF +#define DDR0_00_INT_ACK_ALL 0x7F000000 +#define DDR0_01_INT_MASK_ALL_ON 0x000000FF +#define DDR0_01_INT_MASK_ALL_OFF 0x00000000 + +#define DDR0_17_DLLLOCKREG_MASK 0x00010000 /* Read only */ +#define DDR0_17_DLLLOCKREG_UNLOCKED 0x00000000 +#define DDR0_17_DLLLOCKREG_LOCKED 0x00010000 + +#define DDR0_22 0x16 +/* ECC */ +#define DDR0_22_CTRL_RAW_MASK 0x03000000 +#define DDR0_22_CTRL_RAW_ECC_DISABLE 0x00000000 /* ECC not enabled */ +#define DDR0_22_CTRL_RAW_ECC_CHECK_ONLY 0x01000000 /* ECC no correction */ +#define DDR0_22_CTRL_RAW_NO_ECC_RAM 0x02000000 /* Not a ECC RAM*/ +#define DDR0_22_CTRL_RAW_ECC_ENABLE 0x03000000 /* ECC correcting on */ +#define DDR0_03_CASLAT_DECODE(n) ((((unsigned long)(n))>>16)&0x7) + +#ifdef CFG_ENABLE_SDRAM_CACHE +#define MY_TLB_WORD2_I_ENABLE 0 /* enable caching on DDR2 */ +#else +#define MY_TLB_WORD2_I_ENABLE TLB_WORD2_I_ENABLE /* disable caching on DDR2 */ +#endif + +void program_tlb(u32 phys_addr, u32 virt_addr, u32 size, u32 tlb_word2_i_value); + +#ifdef CONFIG_ADD_RAM_INFO +void board_add_ram_info(int use_default) +{ + PPC440_SYS_INFO board_cfg; + u32 val; + mfsdram(DDR0_22, val); + val &= DDR0_22_CTRL_RAW_MASK; + switch (val) { + case DDR0_22_CTRL_RAW_ECC_DISABLE: + puts(" (ECC disabled"); + break; + case DDR0_22_CTRL_RAW_ECC_CHECK_ONLY: + puts(" (ECC check only"); + break; + case DDR0_22_CTRL_RAW_NO_ECC_RAM: + puts(" (no ECC ram"); + break; + case DDR0_22_CTRL_RAW_ECC_ENABLE: + puts(" (ECC enabled"); + break; + } + + get_sys_info(&board_cfg); + printf(", %d MHz", (board_cfg.freqPLB * 2) / 1000000); + + mfsdram(DDR0_03, val); + val = DDR0_03_CASLAT_DECODE(val); + printf(", CL%d)", val); +} +#endif + +/*-------------------------------------------------------------------- + * wait_for_dlllock. + *--------------------------------------------------------------------*/ +static int wait_for_dlllock(void) +{ + unsigned long val; + int wait = 0; + + /* -----------------------------------------------------------+ + * Wait for the DCC master delay line to finish calibration + * ----------------------------------------------------------*/ + mtdcr(ddrcfga, DDR0_17); + val = DDR0_17_DLLLOCKREG_UNLOCKED; + + while (wait != 0xffff) { + val = mfdcr(ddrcfgd); + if ((val & DDR0_17_DLLLOCKREG_MASK) == + DDR0_17_DLLLOCKREG_LOCKED) + /* dlllockreg bit on */ + return 0; + else + wait++; + } + debug("0x%04x: DDR0_17 Value (dlllockreg bit): 0x%08x\n", wait, val); + debug("Waiting for dlllockreg bit to raise\n"); + + return -1; +} + +/*********************************************************************** + * + * sdram_panic -- Panic if we cannot configure the sdram correctly + * + ************************************************************************/ +void sdram_panic(const char *reason) +{ + printf("\n%s: reason %s", __FUNCTION__, reason); + sysLedSet(0xff); + while (1) { + } + /* Never return */ +} + +#ifdef CONFIG_DDR_ECC +static void blank_string(int size) +{ + int i; + + for (i=0; i<size; i++) + putc('\b'); + for (i=0; i<size; i++) + putc(' '); + for (i=0; i<size; i++) + putc('\b'); +} +/*---------------------------------------------------------------------------+ + * program_ecc. + *---------------------------------------------------------------------------*/ +static void program_ecc(unsigned long start_address, unsigned long num_bytes, + unsigned long tlb_word2_i_value) +{ + unsigned long current_address= start_address; + int loopi = 0; + u32 val; + + char str[] = "ECC generation -"; + char slash[] = "\\|/-\\|/-"; + + sync(); + eieio(); + + puts(str); + + if (tlb_word2_i_value == TLB_WORD2_I_ENABLE) { + /* ECC bit set method for non-cached memory */ + /* This takes various seconds */ + for(current_address = 0; current_address < num_bytes; + current_address += sizeof(u32)) { + *(u32 *)current_address = 0; + if ((current_address % (2 << 20)) == 0) { + putc('\b'); + putc(slash[loopi++ % 8]); + } + } + } else { + /* ECC bit set method for cached memory */ + /* Fast method, no noticeable delay */ + dcbz_area(start_address, num_bytes); + dflush(); + } + blank_string(strlen(str)); + + /* Clear error status */ + mfsdram(DDR0_00, val); + mtsdram(DDR0_00, val | DDR0_00_INT_ACK_ALL); + + /* Set 'int_mask' parameter to functionnal value */ + mfsdram(DDR0_01, val); + mtsdram(DDR0_01, ((val &~ DDR0_01_INT_MASK_MASK) | + DDR0_01_INT_MASK_ALL_OFF)); + + return; +} + +#endif + +/*********************************************************************** + * + * initdram -- 440EPx's DDR controller is a DENALI Core + * + ************************************************************************/ +long int initdram (int board_type) +{ +#define HCU_HW_SDRAM_CONFIG_MASK 0x7 +#define INVALID_HW_CONFIG "Invalid HW-Config" + u16 *hwVersReg = (u16 *) HCU_HW_VERSION_REGISTER; + unsigned int dram_size = 0; + + mtsdram(DDR0_02, 0x00000000); + + /* Values must be kept in sync with Excel-table <<A0001492.>> ! */ + mtsdram(DDR0_00, 0x0000190A); + mtsdram(DDR0_01, 0x01000000); + mtsdram(DDR0_03, 0x02030602); + mtsdram(DDR0_04, 0x0A020200); + mtsdram(DDR0_05, 0x02020307); + switch (*hwVersReg & HCU_HW_SDRAM_CONFIG_MASK) { + case 0: + dram_size = 128 * 1024 * 1024 ; + mtsdram(DDR0_06, 0x0102C80D); /* 128MB RAM */ + mtsdram(DDR0_11, 0x000FC800); /* 128MB RAM */ + mtsdram(DDR0_43, 0x030A0300); /* 128MB RAM */ + break; + case 1: + dram_size = 256 * 1024 * 1024 ; + mtsdram(DDR0_06, 0x0102C812); /* 256MB RAM */ + mtsdram(DDR0_11, 0x0014C800); /* 256MB RAM */ + mtsdram(DDR0_43, 0x030A0200); /* 256MB RAM */ + break; + default: + sdram_panic(INVALID_HW_CONFIG); + break; + } + dram_size -= 16 * 1024 * 1024; + mtsdram(DDR0_07, 0x00090100); + /* + * TCPD=200 cycles of clock input is required to lock the DLL. + * CKE must be HIGH the entire time.mtsdram(DDR0_08, 0x02C80001); + */ + mtsdram(DDR0_08, 0x02C80001); + mtsdram(DDR0_09, 0x00011D5F); + mtsdram(DDR0_10, 0x00000100); + mtsdram(DDR0_12, 0x00000003); + mtsdram(DDR0_14, 0x00000000); + mtsdram(DDR0_17, 0x1D000000); + mtsdram(DDR0_18, 0x1D1D1D1D); + mtsdram(DDR0_19, 0x1D1D1D1D); + mtsdram(DDR0_20, 0x0B0B0B0B); + mtsdram(DDR0_21, 0x0B0B0B0B); + #define ECC_RAM 0x03267F0B + #define NO_ECC_RAM 0x00267F0B +#ifdef CONFIG_DDR_ECC + mtsdram(DDR0_22, ECC_RAM); +#else + mtsdram(DDR0_22, NO_ECC_RAM); +#endif + + mtsdram(DDR0_23, 0x00000000); + mtsdram(DDR0_24, 0x01020001); + mtsdram(DDR0_26, 0x2D930517); + mtsdram(DDR0_27, 0x00008236); + mtsdram(DDR0_28, 0x00000000); + mtsdram(DDR0_31, 0x00000000); + mtsdram(DDR0_42, 0x01000006); + mtsdram(DDR0_44, 0x00000003); + mtsdram(DDR0_02, 0x00000001); + wait_for_dlllock(); + mtsdram(DDR0_00, 0x40000000); /* Zero init bit */ + + /* + * Program tlb entries for this size (dynamic) + */ + program_tlb(0, 0, dram_size, MY_TLB_WORD2_I_ENABLE); + + /* + * Setup 2nd TLB with same physical address but different virtual + * address with cache enabled. This is done for fast ECC generation. + */ + program_tlb(0, CFG_DDR_CACHED_ADDR, dram_size, 0); + +#ifdef CONFIG_DDR_ECC + /* + * If ECC is enabled, initialize the parity bits. + */ + program_ecc(CFG_DDR_CACHED_ADDR, dram_size, 0); +#endif + + return (dram_size); +} |