AM4372 EPOS EVM has 1GB LPDDR2(Part no: MT42L256M32D2LG-25 WT:A) Adding LPDDR2 init sequence and register details for the same. Below is the brief description of LPDDR2 init sequence: -> Configure VTP -> Configure DDR IO settings -> Disable initialization and refreshes until EMIF registers are programmed. -> Program Timing registers -> Program PHY control and Temp alert and ZQ config registers. -> Enable initialization and refreshes and configure SDRAM CONFIG register -> Wait till initialization is complete and the configure MR registers.
Signed-off-by: Lokesh Vutla lokeshvutla@ti.com --- Changes since V2: -> Seperated ioregs changes into a new patch. arch/arm/cpu/armv7/am33xx/ddr.c | 117 ++++++++++++++++++++ arch/arm/cpu/armv7/am33xx/emif4.c | 22 +++- arch/arm/include/asm/arch-am33xx/clocks_am33xx.h | 3 + arch/arm/include/asm/arch-am33xx/cpu.h | 5 + arch/arm/include/asm/arch-am33xx/ddr_defs.h | 33 +++++- arch/arm/include/asm/arch-am33xx/hardware_am43xx.h | 1 + arch/arm/include/asm/emif.h | 12 ++ board/ti/am43xx/board.c | 66 +++++++++++ 8 files changed, 256 insertions(+), 3 deletions(-)
diff --git a/arch/arm/cpu/armv7/am33xx/ddr.c b/arch/arm/cpu/armv7/am33xx/ddr.c index f4eac5f..243ec39 100644 --- a/arch/arm/cpu/armv7/am33xx/ddr.c +++ b/arch/arm/cpu/armv7/am33xx/ddr.c @@ -36,6 +36,71 @@ static struct ddr_data_regs *ddr_data_reg[2] = { static struct ddr_cmdtctrl *ioctrl_reg = { (struct ddr_cmdtctrl *)DDR_CONTROL_BASE_ADDR};
+static inline u32 get_mr(int nr, u32 cs, u32 mr_addr) +{ + u32 mr; + + mr_addr |= cs << EMIF_REG_CS_SHIFT; + writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg); + + mr = readl(&emif_reg[nr]->emif_lpddr2_mode_reg_data); + debug("get_mr: EMIF1 cs %d mr %08x val 0x%x\n", cs, mr_addr, mr); + if (((mr & 0x0000ff00) >> 8) == (mr & 0xff) && + ((mr & 0x00ff0000) >> 16) == (mr & 0xff) && + ((mr & 0xff000000) >> 24) == (mr & 0xff)) + return mr & 0xff; + else + return mr; +} + +static inline void set_mr(int nr, u32 cs, u32 mr_addr, u32 mr_val) +{ + mr_addr |= cs << EMIF_REG_CS_SHIFT; + writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg); + writel(mr_val, &emif_reg[nr]->emif_lpddr2_mode_reg_data); +} + +static void configure_mr(int nr, u32 cs) +{ + u32 mr_addr; + + while (get_mr(nr, cs, LPDDR2_MR0) & LPDDR2_MR0_DAI_MASK) + ; + set_mr(nr, cs, LPDDR2_MR10, 0x56); + + set_mr(nr, cs, LPDDR2_MR1, 0x43); + set_mr(nr, cs, LPDDR2_MR2, 0x2); + + mr_addr = LPDDR2_MR2 | EMIF_REG_REFRESH_EN_MASK; + set_mr(nr, cs, mr_addr, 0x2); +} + +/* + * Configure EMIF4D5 registers and MR registers + */ +void config_sdram_emif4d5(const struct emif_regs *regs, int nr) +{ + writel(0x0, &emif_reg[nr]->emif_pwr_mgmt_ctrl); + writel(0x0, &emif_reg[nr]->emif_pwr_mgmt_ctrl_shdw); + writel(0x1, &emif_reg[nr]->emif_iodft_tlgc); + writel(regs->zq_config, &emif_reg[nr]->emif_zq_config); + + writel(regs->temp_alert_config, &emif_reg[nr]->emif_temp_alert_config); + writel(regs->emif_rd_wr_lvl_rmp_win, + &emif_reg[nr]->emif_rd_wr_lvl_rmp_win); + writel(regs->emif_rd_wr_lvl_rmp_ctl, + &emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl); + writel(regs->emif_rd_wr_lvl_ctl, &emif_reg[nr]->emif_rd_wr_lvl_ctl); + writel(regs->emif_rd_wr_exec_thresh, + &emif_reg[nr]->emif_rd_wr_exec_thresh); + + writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl); + writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config); + + configure_mr(nr, 0); + configure_mr(nr, 1); +} + /** * Configure SDRAM */ @@ -72,15 +137,67 @@ void set_sdram_timings(const struct emif_regs *regs, int nr) writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3_shdw); }
+void __weak emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size) +{ +} + +/* + * Configure EXT PHY registers + */ +static void ext_phy_settings(const struct emif_regs *regs, int nr) +{ + u32 *ext_phy_ctrl_base = 0; + u32 *emif_ext_phy_ctrl_base = 0; + const u32 *ext_phy_ctrl_const_regs; + u32 i = 0; + u32 size; + + ext_phy_ctrl_base = (u32 *)&(regs->emif_ddr_ext_phy_ctrl_1); + emif_ext_phy_ctrl_base = + (u32 *)&(emif_reg[nr]->emif_ddr_ext_phy_ctrl_1); + + /* Configure external phy control timing registers */ + for (i = 0; i < EMIF_EXT_PHY_CTRL_TIMING_REG; i++) { + writel(*ext_phy_ctrl_base, emif_ext_phy_ctrl_base++); + /* Update shadow registers */ + writel(*ext_phy_ctrl_base++, emif_ext_phy_ctrl_base++); + } + + /* + * external phy 6-24 registers do not change with + * ddr frequency + */ + emif_get_ext_phy_ctrl_const_regs(&ext_phy_ctrl_const_regs, &size); + + if (!size) + return; + + for (i = 0; i < size; i++) { + writel(ext_phy_ctrl_const_regs[i], emif_ext_phy_ctrl_base++); + /* Update shadow registers */ + writel(ext_phy_ctrl_const_regs[i], emif_ext_phy_ctrl_base++); + } +} + /** * Configure DDR PHY */ void config_ddr_phy(const struct emif_regs *regs, int nr) { + /* + * disable initialization and refreshes for now until we + * finish programming EMIF regs. + */ + setbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl, + EMIF_REG_INITREF_DIS_MASK); + writel(regs->emif_ddr_phy_ctlr_1, &emif_reg[nr]->emif_ddr_phy_ctrl_1); writel(regs->emif_ddr_phy_ctlr_1, &emif_reg[nr]->emif_ddr_phy_ctrl_1_shdw); + + if (get_emif_rev((u32)emif_reg[nr]) == EMIF_4D5) + ext_phy_settings(regs, nr); }
/** diff --git a/arch/arm/cpu/armv7/am33xx/emif4.c b/arch/arm/cpu/armv7/am33xx/emif4.c index adda650..d28fceb 100644 --- a/arch/arm/cpu/armv7/am33xx/emif4.c +++ b/arch/arm/cpu/armv7/am33xx/emif4.c @@ -48,6 +48,11 @@ static struct vtp_reg *vtpreg[2] = { #ifdef CONFIG_AM33XX static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR; #endif +#ifdef CONFIG_AM43XX +static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR; +static struct cm_device_inst *cm_device = + (struct cm_device_inst *)CM_DEVICE_INST; +#endif
#ifdef CONFIG_TI81XX void config_dmm(const struct dmm_lisa_map_regs *regs) @@ -104,9 +109,24 @@ void config_ddr(unsigned int pll, const struct ctrl_ioregs *ioregs, /* Set CKE to be controlled by EMIF/DDR PHY */ writel(DDR_CKE_CTRL_NORMAL, &ddrctrl->ddrckectrl); #endif +#ifdef CONFIG_AM43XX + writel(readl(&cm_device->cm_dll_ctrl) & ~0x1, &cm_device->cm_dll_ctrl); + while ((readl(&cm_device->cm_dll_ctrl) && CM_DLL_READYST) == 0) + ; + writel(0x0, &ddrctrl->ddrioctrl); + + config_io_ctrl(ioregs); + + /* Set CKE to be controlled by EMIF/DDR PHY */ + writel(DDR_CKE_CTRL_NORMAL, &ddrctrl->ddrckectrl); +#endif + /* Program EMIF instance */ config_ddr_phy(regs, nr); set_sdram_timings(regs, nr); - config_sdram(regs, nr); + if (get_emif_rev(EMIF1_BASE) == EMIF_4D5) + config_sdram_emif4d5(regs, nr); + else + config_sdram(regs, nr); } #endif diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h index 02ed595..4c9352a 100644 --- a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h +++ b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h @@ -28,6 +28,9 @@ #define UART_CLK_RUNNING_MASK 0x1 #define UART_SMART_IDLE_EN (0x1 << 0x3)
+#define CM_DLL_CTRL_NO_OVERRIDE 0x0 +#define CM_DLL_READYST 0x4 + extern void enable_dmm_clocks(void); extern const struct dpll_params dpll_core_opp100; extern struct dpll_params dpll_mpu_opp100; diff --git a/arch/arm/include/asm/arch-am33xx/cpu.h b/arch/arm/include/asm/arch-am33xx/cpu.h index 3ee37dc..9febfa2 100644 --- a/arch/arm/include/asm/arch-am33xx/cpu.h +++ b/arch/arm/include/asm/arch-am33xx/cpu.h @@ -401,6 +401,11 @@ struct cm_perpll { unsigned int cpgmac0clkctrl; /* offset 0xB20 */ };
+struct cm_device_inst { + unsigned int cm_clkout1_ctrl; + unsigned int cm_dll_ctrl; +}; + struct cm_dpll { unsigned int resv1; unsigned int clktimer2clk; /* offset 0x04 */ diff --git a/arch/arm/include/asm/arch-am33xx/ddr_defs.h b/arch/arm/include/asm/arch-am33xx/ddr_defs.h index fe48b5f..c98ab7f 100644 --- a/arch/arm/include/asm/arch-am33xx/ddr_defs.h +++ b/arch/arm/include/asm/arch-am33xx/ddr_defs.h @@ -19,7 +19,11 @@ #define VTP_CTRL_ENABLE (0x1 << 6) #define VTP_CTRL_START_EN (0x1) #define PHY_DLL_LOCK_DIFF 0x0 +#ifdef CONFIG_AM43XX +#define DDR_CKE_CTRL_NORMAL 0x3 +#else #define DDR_CKE_CTRL_NORMAL 0x1 +#endif #define PHY_EN_DYN_PWRDN (0x1 << 20)
/* Micron MT47H128M16RT-25E */ @@ -126,6 +130,14 @@ #define K4B2G1646EBIH9_PHY_WR_DATA 0x76 #define K4B2G1646EBIH9_IOCTRL_VALUE 0x18B
+#define LPDDR2_ADDRCTRL_IOCTRL_VALUE 0x294 +#define LPDDR2_ADDRCTRL_WD0_IOCTRL_VALUE 0x00000000 +#define LPDDR2_ADDRCTRL_WD1_IOCTRL_VALUE 0x00000000 +#define LPDDR2_DATA0_IOCTRL_VALUE 0x20000294 +#define LPDDR2_DATA1_IOCTRL_VALUE 0x20000294 +#define LPDDR2_DATA2_IOCTRL_VALUE 0x20000294 +#define LPDDR2_DATA3_IOCTRL_VALUE 0x20000294 + /** * Configure DMM */ @@ -135,6 +147,7 @@ void config_dmm(const struct dmm_lisa_map_regs *regs); * Configure SDRAM */ void config_sdram(const struct emif_regs *regs, int nr); +void config_sdram_emif4d5(const struct emif_regs *regs, int nr);
/** * Set SDRAM timings @@ -291,12 +304,27 @@ struct ddr_cmdtctrl { unsigned int resv2[12]; unsigned int dt0ioctl; unsigned int dt1ioctl; + unsigned int dt2ioctrl; + unsigned int dt3ioctrl; + unsigned int resv3[4]; + unsigned int emif_sdram_config_ext; +}; + +struct ctrl_ioregs { + unsigned int cm0ioctl; + unsigned int cm1ioctl; + unsigned int cm2ioctl; + unsigned int dt0ioctl; + unsigned int dt1ioctl; + unsigned int dt2ioctrl; + unsigned int dt3ioctrl; + unsigned int emif_sdram_config_ext; };
/** * Configure DDR io control registers */ -void config_io_ctrl(unsigned long val); +void config_io_ctrl(const struct ctrl_ioregs *ioregs);
struct ddr_ctrl { unsigned int ddrioctrl; @@ -304,8 +332,9 @@ struct ddr_ctrl { unsigned int ddrckectrl; };
-void config_ddr(unsigned int pll, unsigned int ioctrl, +void config_ddr(unsigned int pll, const struct ctrl_ioregs *ioregs, const struct ddr_data *data, const struct cmd_control *ctrl, const struct emif_regs *regs, int nr); +void emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size);
#endif /* _DDR_DEFS_H */ diff --git a/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h b/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h index ada1b4c..b9a701d 100644 --- a/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h +++ b/arch/arm/include/asm/arch-am33xx/hardware_am43xx.h @@ -62,6 +62,7 @@ #define PRM_PER_USBPHYOCP2SCP0_CLKCTRL (CM_PER + 0x5b8) #define PRM_PER_USBPHYOCP2SCP1_CLKCTRL (CM_PER + 0x5c0) #define USBPHYOCPSCP_MODULE_EN (1 << 2) +#define CM_DEVICE_INST 0x44df4100
/* Control status register */ #define CTRL_CRYSTAL_FREQ_SRC_MASK (1 << 31) diff --git a/arch/arm/include/asm/emif.h b/arch/arm/include/asm/emif.h index 1b94a99..ce6b229 100644 --- a/arch/arm/include/asm/emif.h +++ b/arch/arm/include/asm/emif.h @@ -14,11 +14,15 @@ #define _EMIF_H_ #include <asm/types.h> #include <common.h> +#include <asm/io.h>
/* Base address */ #define EMIF1_BASE 0x4c000000 #define EMIF2_BASE 0x4d000000
+#define EMIF_4D 0x4 +#define EMIF_4D5 0x5 + /* Registers shifts, masks and values */
/* EMIF_MOD_ID_REV */ @@ -1139,6 +1143,14 @@ struct lpddr2_mr_regs { s8 mr16; };
+static inline u32 get_emif_rev(u32 base) +{ + struct emif_reg_struct *emif = (struct emif_reg_struct *)base; + + return (readl(&emif->emif_mod_id_rev) & EMIF_REG_MAJOR_REVISION_MASK) + >> EMIF_REG_MAJOR_REVISION_SHIFT; +} + /* assert macros */ #if defined(DEBUG) #define emif_assert(c) ({ if (!(c)) for (;;); }) diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c index 5c92ac7..5a013e3 100644 --- a/board/ti/am43xx/board.c +++ b/board/ti/am43xx/board.c @@ -15,6 +15,8 @@ #include <asm/arch/clock.h> #include <asm/arch/sys_proto.h> #include <asm/arch/mux.h> +#include <asm/arch/ddr_defs.h> +#include <asm/emif.h> #include "board.h"
DECLARE_GLOBAL_DATA_PTR; @@ -122,6 +124,69 @@ const struct dpll_params epos_evm_dpll_ddr = { const struct dpll_params gp_evm_dpll_ddr = { 400, 23, 1, -1, 1, -1, -1};
+const struct ctrl_ioregs ioregs_lpddr2 = { + .cm0ioctl = LPDDR2_ADDRCTRL_IOCTRL_VALUE, + .cm1ioctl = LPDDR2_ADDRCTRL_WD0_IOCTRL_VALUE, + .cm2ioctl = LPDDR2_ADDRCTRL_WD1_IOCTRL_VALUE, + .dt0ioctl = LPDDR2_DATA0_IOCTRL_VALUE, + .dt1ioctl = LPDDR2_DATA0_IOCTRL_VALUE, + .dt2ioctrl = LPDDR2_DATA0_IOCTRL_VALUE, + .dt3ioctrl = LPDDR2_DATA0_IOCTRL_VALUE, + .emif_sdram_config_ext = 0x1, +}; + +const struct emif_regs emif_regs_lpddr2 = { + .sdram_config = 0x808012BA, + .ref_ctrl = 0x0000040D, + .sdram_tim1 = 0xEA86B411, + .sdram_tim2 = 0x103A094A, + .sdram_tim3 = 0x0F6BA37F, + .read_idle_ctrl = 0x00050000, + .zq_config = 0x50074BE4, + .temp_alert_config = 0x0, + .emif_rd_wr_lvl_rmp_win = 0x0, + .emif_rd_wr_lvl_rmp_ctl = 0x0, + .emif_rd_wr_lvl_ctl = 0x0, + .emif_ddr_phy_ctlr_1 = 0x0E084006, + .emif_rd_wr_exec_thresh = 0x00000405, + .emif_ddr_ext_phy_ctrl_1 = 0x04010040, + .emif_ddr_ext_phy_ctrl_2 = 0x00500050, + .emif_ddr_ext_phy_ctrl_3 = 0x00500050, + .emif_ddr_ext_phy_ctrl_4 = 0x00500050, + .emif_ddr_ext_phy_ctrl_5 = 0x00500050 +}; + +const u32 ext_phy_ctrl_const_base_lpddr2[] = { + 0x00500050, + 0x00350035, + 0x00350035, + 0x00350035, + 0x00350035, + 0x00350035, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x40001000, + 0x08102040 +}; + +void emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size) +{ + *regs = ext_phy_ctrl_const_base_lpddr2; + *size = ARRAY_SIZE(ext_phy_ctrl_const_base_lpddr2); + + return; +} + const struct dpll_params *get_dpll_ddr_params(void) { struct am43xx_board_id header; @@ -217,6 +282,7 @@ void set_mux_conf_regs(void)
void sdram_init(void) { + config_ddr(0, &ioregs_lpddr2, NULL, NULL, &emif_regs_lpddr2, 0); } #endif