From 4f1d1b7d1e647b4e0ffd9b9feedd02110d078bdb Mon Sep 17 00:00:00 2001 From: Mingkai Hu Date: Thu, 7 Jul 2011 12:29:15 +0800 Subject: powerpc/p2041rdb: Add p2041rdb board support P2041RDB Specification: ----------------------- Memory subsystem: * 4Gbyte unbuffered DDR3 SDRAM SO-DIMM(64bit bus) * 128 Mbyte NOR flash single-chip memory * 256 Kbit M24256 I2C EEPROM * 16 Mbyte SPI memory * SD connector to interface with the SD memory card Ethernet: * dTSEC1: connected to the Vitesse SGMII PHY (VSC8221) * dTSEC2: connected to the Vitesse SGMII PHY (VSC8221) * dTSEC3: connected to the Vitesse SGMII PHY (VSC8221) * dTSEC4: connected to the Vitesse RGMII PHY (VSC8641) * dTSEC5: connected to the Vitesse RGMII PHY (VSC8641) PCIe: * Lanes E, F, G and H of Bank1 are connected to one x4 PCIe SLOT1 * Lanes C and Land D of Bank2 are connected to one x4 PCIe SLOT2 SATA: Lanes C and Land D of Bank2 are connected to two SATA connectors USB 2.0: connected via a internal UTMI PHY to two TYPE-A interfaces I2C: * I2C1: Real time clock, Temperature sensor, Memory module * I2C2: Vcore Regulator, 256Kbit I2C Bus EEPROM, PCIe slot1/2 UART: supports two UARTs up to 115200 bps for console Signed-off-by: Mingkai Hu Signed-off-by: Kumar Gala --- board/freescale/p2041rdb/ddr.c | 115 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 board/freescale/p2041rdb/ddr.c (limited to 'board/freescale/p2041rdb/ddr.c') diff --git a/board/freescale/p2041rdb/ddr.c b/board/freescale/p2041rdb/ddr.c new file mode 100644 index 0000000..46de910 --- /dev/null +++ b/board/freescale/p2041rdb/ddr.c @@ -0,0 +1,115 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * Version 2 as published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include + +typedef struct { + u32 datarate_mhz_low; + u32 datarate_mhz_high; + u32 n_ranks; + u32 clk_adjust; + u32 wrlvl_start; + u32 cpo; + u32 write_data_delay; + u32 force_2T; +} board_specific_parameters_t; + +/* + * ranges for parameters: + * wr_data_delay = 0-6 + * clk adjust = 0-8 + * cpo 2-0x1E (30) + */ +const board_specific_parameters_t board_specific_parameters[] = { + /* + * memory controller 0 + * lo| hi| num| clk| wrlvl | cpo |wrdata|2T + * mhz| mhz|ranks|adjst| start | delay| + */ + { 1017, 1116, 2, 4, 6, 0xff, 2, 0}, +}; + +void fsl_ddr_board_options(memctl_options_t *popts, + dimm_params_t *pdimm, + unsigned int ctrl_num) +{ + const board_specific_parameters_t *pbsp = + &board_specific_parameters[0]; + u32 num_params = ARRAY_SIZE(board_specific_parameters); + u32 i; + ulong ddr_freq; + + /* + * Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr + * freqency and n_banks specified in board_specific_parameters table. + */ + ddr_freq = get_ddr_freq(0) / 1000000; + for (i = 0; i < num_params; i++) { + if (ddr_freq >= pbsp->datarate_mhz_low && + ddr_freq <= pbsp->datarate_mhz_high && + pdimm[0].n_ranks == pbsp->n_ranks) { + popts->cpo_override = pbsp->cpo; + popts->write_data_delay = pbsp->write_data_delay; + popts->clk_adjust = pbsp->clk_adjust; + popts->wrlvl_start = pbsp->wrlvl_start; + popts->twoT_en = pbsp->force_2T; + break; + } + pbsp++; + } + + if (i == num_params) { + printf("Warning: board specific timing not found " + "for data rate %lu MT/s!\n", ddr_freq); + } + + /* + * Factors to consider for half-strength driver enable: + * - number of DIMMs installed + */ + popts->half_strength_driver_enable = 0; + /* Write leveling override */ + popts->wrlvl_override = 1; + popts->wrlvl_sample = 0xf; + + /* Rtt and Rtt_WR override */ + popts->rtt_override = 0; + + /* Enable ZQ calibration */ + popts->zq_en = 1; + + /* DHC_EN =1, ODT = 60 Ohm */ + popts->ddr_cdr1 = DDR_CDR1_DHC_EN; +} + +phys_size_t initdram(int board_type) +{ + phys_size_t dram_size = 0; + + puts("Initializing...."); + + if (fsl_use_spd()) { + puts("using SPD\n"); + dram_size = fsl_ddr_sdram(); + } else { + puts("no SPD and fixed parameters\n"); + return dram_size; + } + + dram_size = setup_ddr_tlbs(dram_size / 0x100000); + dram_size *= 0x100000; + + puts(" DDR: "); + return dram_size; +} -- cgit v1.1