diff options
Diffstat (limited to 'drivers/ddr/imx8m/ddrphy_train.c')
-rw-r--r-- | drivers/ddr/imx8m/ddrphy_train.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/drivers/ddr/imx8m/ddrphy_train.c b/drivers/ddr/imx8m/ddrphy_train.c new file mode 100644 index 0000000000..c2238cc66b --- /dev/null +++ b/drivers/ddr/imx8m/ddrphy_train.c @@ -0,0 +1,112 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2018 NXP + */ +#define DEBUG +#include <common.h> +#include <linux/kernel.h> +#include <soc/imx8m/ddr.h> +#include <firmware.h> +#include <mach/imx8m-regs.h> + +void ddr_load_train_code(enum fw_type type) +{ + const u16 *imem, *dmem; + size_t isize, dsize; + + if (type == FW_1D_IMAGE) { + get_builtin_firmware(lpddr4_pmu_train_1d_imem_bin, &imem, &isize); + get_builtin_firmware(lpddr4_pmu_train_1d_dmem_bin, &dmem, &dsize); + } else { + get_builtin_firmware(lpddr4_pmu_train_2d_imem_bin, &imem, &isize); + get_builtin_firmware(lpddr4_pmu_train_2d_dmem_bin, &dmem, &dsize); + } + + ddrc_phy_load_firmware(IOMEM(MX8M_DDRC_PHY_BASE_ADDR), + DDRC_PHY_IMEM, imem, isize); + + ddrc_phy_load_firmware(IOMEM(MX8M_DDRC_PHY_BASE_ADDR), + DDRC_PHY_DMEM, dmem, dsize); +} + +int ddr_cfg_phy(struct dram_timing_info *dram_timing) +{ + struct dram_cfg_param *dram_cfg; + struct dram_fsp_msg *fsp_msg; + unsigned int num; + int i = 0; + int j = 0; + int ret; + + /* initialize PHY configuration */ + dram_cfg = dram_timing->ddrphy_cfg; + num = dram_timing->ddrphy_cfg_num; + for (i = 0; i < num; i++) { + /* config phy reg */ + dwc_ddrphy_apb_wr(dram_cfg->reg, dram_cfg->val); + dram_cfg++; + } + + /* load the frequency setpoint message block config */ + fsp_msg = dram_timing->fsp_msg; + for (i = 0; i < dram_timing->fsp_msg_num; i++) { + debug("DRAM PHY training for %dMTS\n", fsp_msg->drate); + /* set dram PHY input clocks to desired frequency */ + ddrphy_init_set_dfi_clk(fsp_msg->drate); + + /* load the dram training firmware image */ + dwc_ddrphy_apb_wr(0xd0000, 0x0); + ddr_load_train_code(fsp_msg->fw_type); + + /* load the frequency set point message block parameter */ + dram_cfg = fsp_msg->fsp_cfg; + num = fsp_msg->fsp_cfg_num; + for (j = 0; j < num; j++) { + dwc_ddrphy_apb_wr(dram_cfg->reg, dram_cfg->val); + dram_cfg++; + } + + /* + * -------------------- excute the firmware -------------------- + * Running the firmware is a simply process to taking the + * PMU out of reset and stall, then the firwmare will be run + * 1. reset the PMU; + * 2. begin the excution; + * 3. wait for the training done; + * 4. read the message block result. + * ------------------------------------------------------------- + */ + dwc_ddrphy_apb_wr(0xd0000, 0x1); + dwc_ddrphy_apb_wr(0xd0099, 0x9); + dwc_ddrphy_apb_wr(0xd0099, 0x1); + dwc_ddrphy_apb_wr(0xd0099, 0x0); + + /* Wait for the training firmware to complete */ + ret = wait_ddrphy_training_complete(); + if (ret) + return ret; + + /* Halt the microcontroller. */ + dwc_ddrphy_apb_wr(0xd0099, 0x1); + + /* Read the Message Block results */ + dwc_ddrphy_apb_wr(0xd0000, 0x0); + ddrphy_init_read_msg_block(fsp_msg->fw_type); + dwc_ddrphy_apb_wr(0xd0000, 0x1); + + fsp_msg++; + } + + /* Load PHY Init Engine Image */ + dram_cfg = dram_timing->ddrphy_pie; + num = dram_timing->ddrphy_pie_num; + for (i = 0; i < num; i++) { + dwc_ddrphy_apb_wr(dram_cfg->reg, dram_cfg->val); + dram_cfg++; + } + + /* save the ddr PHY trained CSR in memory for low power use */ + ddrphy_trained_csr_save(ddrphy_trained_csr, ddrphy_trained_csr_num); + + return 0; +} |