mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*/
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#include <common.h>
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#include <i2c.h>
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#include <fsl_ddr_sdram.h>
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#include <fsl_ddr_dimm_params.h>
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void fsl_ddr_board_options(memctl_options_t *popts,
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dimm_params_t *pdimm,
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unsigned int ctrl_num)
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{
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/*
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* Factors to consider for clock adjust:
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* - number of chips on bus
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* - position of slot
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* - DDR1 vs. DDR2?
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* - ???
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*
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* This needs to be determined on a board-by-board basis.
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* 0110 3/4 cycle late
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* 0111 7/8 cycle late
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*/
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popts->clk_adjust = 7;
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/*
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* Factors to consider for CPO:
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* - frequency
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* - ddr1 vs. ddr2
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*/
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popts->cpo_override = 10;
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/*
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* Factors to consider for write data delay:
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* - number of DIMMs
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*
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* 1 = 1/4 clock delay
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* 2 = 1/2 clock delay
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* 3 = 3/4 clock delay
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* 4 = 1 clock delay
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* 5 = 5/4 clock delay
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* 6 = 3/2 clock delay
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*/
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popts->write_data_delay = 3;
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/*
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* Factors to consider for half-strength driver enable:
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* - number of DIMMs installed
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*/
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popts->half_strength_driver_enable = 0;
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}
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#ifdef CONFIG_SPD_EEPROM
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/*
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* Workaround for hardware errata. An i2c address conflict
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* existed on earlier boards; the workaround moved the DDR
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* SPD from 0x51 to 0x53. So we try and read 0x53 1st, and
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* if that fails, then fall back to reading at 0x51.
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*/
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void get_spd(generic_spd_eeprom_t *spd, u8 i2c_address)
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{
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int ret;
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#ifdef ALT_SPD_EEPROM_ADDRESS
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if (i2c_address == SPD_EEPROM_ADDRESS) {
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ret = i2c_read(ALT_SPD_EEPROM_ADDRESS, 0, 1, (uchar *)spd,
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sizeof(generic_spd_eeprom_t));
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if (ret == 0)
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return; /* Good data at 0x53 */
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memset(spd, 0, sizeof(generic_spd_eeprom_t));
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}
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#endif
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ret = i2c_read(i2c_address, 0, 1, (uchar *)spd,
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sizeof(generic_spd_eeprom_t));
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if (ret) {
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printf("DDR: failed to read SPD from addr %u\n", i2c_address);
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memset(spd, 0, sizeof(generic_spd_eeprom_t));
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}
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}
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#else
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/*
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* fixed_sdram init -- doesn't use serial presence detect.
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* Assumes 256MB DDR2 SDRAM SODIMM, without ECC, running at DDR400 speed.
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*/
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phys_size_t fixed_sdram(void)
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{
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struct ccsr_ddr __iomem *ddr =
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(struct ccsr_ddr __iomem *)(CONFIG_SYS_FSL_DDR_ADDR);
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out_be32(&ddr->cs0_bnds, 0x0000007f);
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out_be32(&ddr->cs1_bnds, 0x008000ff);
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out_be32(&ddr->cs2_bnds, 0x00000000);
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out_be32(&ddr->cs3_bnds, 0x00000000);
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out_be32(&ddr->cs0_config, 0x80010101);
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out_be32(&ddr->cs1_config, 0x80010101);
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out_be32(&ddr->cs2_config, 0x00000000);
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out_be32(&ddr->cs3_config, 0x00000000);
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out_be32(&ddr->timing_cfg_3, 0x00000000);
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out_be32(&ddr->timing_cfg_0, 0x00220802);
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out_be32(&ddr->timing_cfg_1, 0x38377322);
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out_be32(&ddr->timing_cfg_2, 0x0fa044C7);
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out_be32(&ddr->sdram_cfg, 0x4300C000);
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out_be32(&ddr->sdram_cfg_2, 0x24401000);
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out_be32(&ddr->sdram_mode, 0x23C00542);
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out_be32(&ddr->sdram_mode_2, 0x00000000);
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out_be32(&ddr->sdram_interval, 0x05080100);
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out_be32(&ddr->sdram_md_cntl, 0x00000000);
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out_be32(&ddr->sdram_data_init, 0x00000000);
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out_be32(&ddr->sdram_clk_cntl, 0x03800000);
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asm("sync;isync;msync");
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udelay(500);
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#ifdef CONFIG_DDR_ECC
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/* Enable ECC checking */
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out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL | 0x20000000);
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#else
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out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL);
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#endif
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return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
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}
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#endif
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