From: Ye Li ye.li@nxp.com
Add iMX8ULP DDR initialization driver which loads the DDR timing parameters and executes the training procedure.
When enabling IMX8ULP_DRAM_PHY_PLL_BYPASS, using PHY PLL bypass mode to do DDR init
Signed-off-by: Ye Li ye.li@nxp.com --- drivers/Makefile | 1 + drivers/ddr/imx/Kconfig | 1 + drivers/ddr/imx/imx8ulp/Kconfig | 11 ++ drivers/ddr/imx/imx8ulp/Makefile | 9 ++ drivers/ddr/imx/imx8ulp/ddr_init.c | 217 +++++++++++++++++++++++++++++ 5 files changed, 239 insertions(+) create mode 100644 drivers/ddr/imx/imx8ulp/Kconfig create mode 100644 drivers/ddr/imx/imx8ulp/Makefile create mode 100644 drivers/ddr/imx/imx8ulp/ddr_init.c
diff --git a/drivers/Makefile b/drivers/Makefile index 3510daba29..7533ac6aa0 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_ARMADA_38X) += ddr/marvell/a38x/ obj-$(CONFIG_ARMADA_XP) += ddr/marvell/axp/ obj-$(CONFIG_$(SPL_)ALTERA_SDRAM) += ddr/altera/ obj-$(CONFIG_ARCH_IMX8M) += ddr/imx/imx8m/ +obj-$(CONFIG_IMX8ULP_DRAM) += ddr/imx/imx8ulp/ obj-$(CONFIG_SPL_POWER_SUPPORT) += power/ power/pmic/ obj-$(CONFIG_SPL_POWER_SUPPORT) += power/regulator/ obj-$(CONFIG_SPL_POWER_DOMAIN) += power/domain/ diff --git a/drivers/ddr/imx/Kconfig b/drivers/ddr/imx/Kconfig index 7e06fb2f7d..179f34530d 100644 --- a/drivers/ddr/imx/Kconfig +++ b/drivers/ddr/imx/Kconfig @@ -1 +1,2 @@ source "drivers/ddr/imx/imx8m/Kconfig" +source "drivers/ddr/imx/imx8ulp/Kconfig" diff --git a/drivers/ddr/imx/imx8ulp/Kconfig b/drivers/ddr/imx/imx8ulp/Kconfig new file mode 100644 index 0000000000..e56062a1d0 --- /dev/null +++ b/drivers/ddr/imx/imx8ulp/Kconfig @@ -0,0 +1,11 @@ +menu "i.MX8ULP DDR controllers" + depends on ARCH_IMX8ULP + +config IMX8ULP_DRAM + bool "imx8m dram" + +config IMX8ULP_DRAM_PHY_PLL_BYPASS + bool "Enable the DDR PHY PLL bypass mode, so PHY clock is from DDR_CLK " + depends on IMX8ULP_DRAM + +endmenu diff --git a/drivers/ddr/imx/imx8ulp/Makefile b/drivers/ddr/imx/imx8ulp/Makefile new file mode 100644 index 0000000000..7f44a92180 --- /dev/null +++ b/drivers/ddr/imx/imx8ulp/Makefile @@ -0,0 +1,9 @@ +# +# Copyright 2021 NXP +# +# SPDX-License-Identifier: GPL-2.0+ +# + +ifdef CONFIG_SPL_BUILD +obj-$(CONFIG_IMX8ULP_DRAM) += ddr_init.o +endif diff --git a/drivers/ddr/imx/imx8ulp/ddr_init.c b/drivers/ddr/imx/imx8ulp/ddr_init.c new file mode 100644 index 0000000000..16aaf56103 --- /dev/null +++ b/drivers/ddr/imx/imx8ulp/ddr_init.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0+ OR MIT +/* + * Copyright 2021 NXP + */ +#include <common.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/ddr.h> +#include <asm/arch/imx-regs.h> + +#define DENALI_CTL_00 (DDR_CTL_BASE_ADDR + 4 * 0) +#define CTL_START 0x1 + +#define DENALI_CTL_03 (DDR_CTL_BASE_ADDR + 4 * 3) +#define DENALI_CTL_197 (DDR_CTL_BASE_ADDR + 4 * 197) +#define DENALI_CTL_250 (DDR_CTL_BASE_ADDR + 4 * 250) +#define DENALI_CTL_251 (DDR_CTL_BASE_ADDR + 4 * 251) +#define DENALI_CTL_266 (DDR_CTL_BASE_ADDR + 4 * 266) +#define DFI_INIT_COMPLETE 0x2 + +#define DENALI_CTL_614 (DDR_CTL_BASE_ADDR + 4 * 614) +#define DENALI_CTL_615 (DDR_CTL_BASE_ADDR + 4 * 615) + +#define DENALI_PI_00 (DDR_PI_BASE_ADDR + 4 * 0) +#define PI_START 0x1 + +#define DENALI_PI_04 (DDR_PI_BASE_ADDR + 4 * 4) +#define DENALI_PI_11 (DDR_PI_BASE_ADDR + 4 * 11) +#define DENALI_PI_12 (DDR_PI_BASE_ADDR + 4 * 12) +#define DENALI_CTL_23 (DDR_CTL_BASE_ADDR + 4 * 23) +#define DENALI_CTL_25 (DDR_CTL_BASE_ADDR + 4 * 25) + +#define DENALI_PHY_1624 (DDR_PHY_BASE_ADDR + 4 * 1624) +#define DENALI_PHY_1537 (DDR_PHY_BASE_ADDR + 4 * 1537) +#define PHY_FREQ_SEL_MULTICAST_EN(X) ((X) << 8) +#define PHY_FREQ_SEL_INDEX(X) ((X) << 16) + +#define DENALI_PHY_1547 (DDR_PHY_BASE_ADDR + 4 * 1547) +#define DENALI_PHY_1555 (DDR_PHY_BASE_ADDR + 4 * 1555) +#define DENALI_PHY_1564 (DDR_PHY_BASE_ADDR + 4 * 1564) +#define DENALI_PHY_1565 (DDR_PHY_BASE_ADDR + 4 * 1565) + +static void ddr_enable_pll_bypass(void) +{ + u32 reg_val; + + /* PI_INIT_LVL_EN=0x0 (DENALI_PI_04) */ + reg_val = readl(DENALI_PI_04) & ~0x1; + writel(reg_val, DENALI_PI_04); + + /* PI_FREQ_MAP=0x1 (DENALI_PI_12) */ + writel(0x1, DENALI_PI_12); + + /* PI_INIT_WORK_FREQ=0x0 (DENALI_PI_11) */ + reg_val = readl(DENALI_PI_11) & ~(0x1f << 8); + writel(reg_val, DENALI_PI_11); + + /* DFIBUS_FREQ_INIT=0x0 (DENALI_CTL_23) */ + reg_val = readl(DENALI_CTL_23) & ~(0x3 << 24); + writel(reg_val, DENALI_CTL_23); + + /* PHY_LP4_BOOT_DISABLE=0x0 (DENALI_PHY_1547) */ + reg_val = readl(DENALI_PHY_1547) & ~(0x1 << 8); + writel(reg_val, DENALI_PHY_1547); + + /* PHY_PLL_BYPASS=0x1 (DENALI_PHY_1624) */ + reg_val = readl(DENALI_PHY_1624) | 0x1; + writel(reg_val, DENALI_PHY_1624); + + /* PHY_LP4_BOOT_PLL_BYPASS to 0x1 (DENALI_PHY_1555) */ + reg_val = readl(DENALI_PHY_1555) | 0x1; + writel(reg_val, DENALI_PHY_1555); + + /* FREQ_CHANGE_TYPE_F0 = 0x0/FREQ_CHANGE_TYPE_F1 = 0x1/FREQ_CHANGE_TYPE_F2 = 0x2 */ + reg_val = 0x020100; + writel(reg_val, DENALI_CTL_25); +} + +int ddr_calibration(unsigned int fsp_table[3]) +{ + u32 reg_val; + u32 int_status_init, phy_freq_req, phy_freq_type; + u32 lock_0, lock_1, lock_2; + u32 freq_chg_pt, freq_chg_cnt; + + if (IS_ENABLED(CONFIG_IMX8ULP_DRAM_PHY_PLL_BYPASS)) { + ddr_enable_pll_bypass(); + freq_chg_cnt = 0; + freq_chg_pt = 0; + } else { + reg_val = readl(DENALI_CTL_250); + if (((reg_val >> 16) & 0x3) == 1) + freq_chg_cnt = 2; + else + freq_chg_cnt = 3; + + reg_val = readl(DENALI_PI_12); + if (reg_val == 0x3) { + freq_chg_pt = 1; + } else if (reg_val == 0x7) { + freq_chg_pt = 2; + } else { + printf("frequency map(0x%x) is wrong, please check!\r\n", reg_val); + return -1; + } + } + + /* Assert PI_START parameter and then assert START parameter in Controller. */ + reg_val = readl(DENALI_PI_00) | PI_START; + writel(reg_val, DENALI_PI_00); + + reg_val = readl(DENALI_CTL_00) | CTL_START; + writel(reg_val, DENALI_CTL_00); + + /* Poll for init_done_bit in Controller interrupt status register (INT_STATUS_INIT) */ + do { + if (!freq_chg_cnt) { + int_status_init = (readl(DENALI_CTL_266) >> 8) & 0xff; + /* DDR subsystem is ready for traffic. */ + if (int_status_init & DFI_INIT_COMPLETE) { + debug("complete\n"); + break; + } + } + + /* + * During leveling, PHY will request for freq change and SoC clock logic + * should provide requested frequency + * Polling SIM LPDDR_CTRL2 Bit phy_freq_chg_req until be 1'b1 + */ + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + phy_freq_req = (reg_val >> 7) & 0x1; + + if (phy_freq_req) { + phy_freq_type = reg_val & 0x1F; + if (phy_freq_type == 0x00) { + debug("Poll for freq_chg_req on SIM register and change to F0 frequency.\n"); + set_ddr_clk(fsp_table[phy_freq_type] >> 1); + + /* Write 1'b1 at LPDDR_CTRL2 bit phy_freq_cfg_ack */ + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + writel(reg_val | (0x1 << 6), AVD_SIM_LPDDR_CTRL2); + } else if (phy_freq_type == 0x01) { + debug("Poll for freq_chg_req on SIM register and change to F1 frequency.\n"); + set_ddr_clk(fsp_table[phy_freq_type] >> 1); + + /* Write 1'b1 at LPDDR_CTRL2 bit phy_freq_cfg_ack */ + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + writel(reg_val | (0x1 << 6), AVD_SIM_LPDDR_CTRL2); + if (freq_chg_pt == 1) + freq_chg_cnt--; + } else if (phy_freq_type == 0x02) { + debug("Poll for freq_chg_req on SIM register and change to F2 frequency.\n"); + set_ddr_clk(fsp_table[phy_freq_type] >> 1); + + /* Write 1'b1 at LPDDR_CTRL2 bit phy_freq_cfg_ack */ + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + writel(reg_val | (0x1 << 6), AVD_SIM_LPDDR_CTRL2); + if (freq_chg_pt == 2) + freq_chg_cnt--; + } + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + } + } while (1); + + /* Check PLL lock status */ + lock_0 = readl(DENALI_PHY_1564) & 0xffff; + lock_1 = (readl(DENALI_PHY_1564) >> 16) & 0xffff; + lock_2 = readl(DENALI_PHY_1565) & 0xffff; + + if ((lock_0 & 0x3) != 0x3 || (lock_1 & 0x3) != 0x3 || (lock_2 & 0x3) != 0x3) { + debug("De-Skew PLL failed to lock\n"); + debug("lock_0=0x%x, lock_1=0x%x, lock_2=0x%x\n", lock_0, lock_1, lock_2); + return -1; + } + + debug("De-Skew PLL is locked and ready\n"); + return 0; +} + +int ddr_init(struct dram_timing_info2 *dram_timing) +{ + int i; + + if (IS_ENABLED(CONFIG_IMX8ULP_DRAM_PHY_PLL_BYPASS)) { + /* Use PLL bypass for boot freq */ + /* Since PLL can't generate the double freq, Need ddr clock to generate it. */ + set_ddr_clk(dram_timing->fsp_table[0]); /* Set to boot freq */ + setbits_le32(AVD_SIM_BASE_ADDR, 0x1); /* SIM_DDR_CTRL_DIV2_EN */ + } else { + set_ddr_clk(dram_timing->fsp_table[0] >> 1); /* Set to boot freq */ + clrbits_le32(AVD_SIM_BASE_ADDR, 0x1); /* SIM_DDR_CTRL_DIV2_EN */ + } + + /* Initialize CTL registers */ + for (i = 0; i < dram_timing->ctl_cfg_num; i++) + writel(dram_timing->ctl_cfg[i].val, (ulong)dram_timing->ctl_cfg[i].reg); + + /* Initialize PI registers */ + for (i = 0; i < dram_timing->pi_cfg_num; i++) + writel(dram_timing->pi_cfg[i].val, (ulong)dram_timing->pi_cfg[i].reg); + + /* Write PHY regiters for all 3 frequency points (48Mhz/384Mhz/528Mhz): f1_index=0 */ + writel(PHY_FREQ_SEL_MULTICAST_EN(1) | PHY_FREQ_SEL_INDEX(0), DENALI_PHY_1537); + for (i = 0; i < dram_timing->phy_f1_cfg_num; i++) + writel(dram_timing->phy_f1_cfg[i].val, (ulong)dram_timing->phy_f1_cfg[i].reg); + + /* Write PHY regiters for freqency point 2 (528Mhz): f2_index=1 */ + writel(PHY_FREQ_SEL_MULTICAST_EN(0) | PHY_FREQ_SEL_INDEX(1), DENALI_PHY_1537); + for (i = 0; i < dram_timing->phy_f2_cfg_num; i++) + writel(dram_timing->phy_f2_cfg[i].val, (ulong)dram_timing->phy_f2_cfg[i].reg); + + /* Re-enable MULTICAST mode */ + writel(PHY_FREQ_SEL_MULTICAST_EN(1) | PHY_FREQ_SEL_INDEX(0), DENALI_PHY_1537); + + return ddr_calibration(dram_timing->fsp_table); +}