From: Sherry Sun <[email protected]> Add inline ECC support for lpddr4 on imx8mp-evk. And add a config which can enable/disable inline ECC feature for lpddr4 on imx8mp-evk board.
Signed-off-by: Sherry Sun <[email protected]> Signed-off-by: Peng Fan <[email protected]> --- arch/arm/include/asm/arch-imx8m/ddr.h | 7 +++ board/freescale/imx8mp_evk/lpddr4_timing.c | 27 +++++++++++ drivers/ddr/imx/imx8m/Kconfig | 7 +++ drivers/ddr/imx/imx8m/ddr_init.c | 72 ++++++++++++++++++++++++++++++ 4 files changed, 113 insertions(+) diff --git a/arch/arm/include/asm/arch-imx8m/ddr.h b/arch/arm/include/asm/arch-imx8m/ddr.h index 7a2a2d8edc..04c9c962cf 100644 --- a/arch/arm/include/asm/arch-imx8m/ddr.h +++ b/arch/arm/include/asm/arch-imx8m/ddr.h @@ -529,6 +529,8 @@ enum msg_response { #define DDRC_SBRWDATA0(X) (DDRC_IPS_BASE_ADDR(X) + 0xf2c) #define DDRC_SBRWDATA1(X) (DDRC_IPS_BASE_ADDR(X) + 0xf30) #define DDRC_PDCH(X) (DDRC_IPS_BASE_ADDR(X) + 0xf34) +#define DDRC_SBRSTART0(X) (DDRC_IPS_BASE_ADDR(X) + 0xf38) +#define DDRC_SBRRANGE0(X) (DDRC_IPS_BASE_ADDR(X) + 0xf40) #define DDRC_FREQ1_DERATEEN(X) (DDRC_IPS_BASE_ADDR(X) + 0x2020) #define DDRC_FREQ1_DERATEINT(X) (DDRC_IPS_BASE_ADDR(X) + 0x2024) @@ -708,6 +710,11 @@ int ddr_cfg_phy(struct dram_timing_info *timing_info); void load_lpddr4_phy_pie(void); void ddrphy_trained_csr_save(struct dram_cfg_param *param, unsigned int num); void dram_config_save(struct dram_timing_info *info, unsigned long base); +void board_dram_ecc_scrub(void); +void ddrc_inline_ecc_scrub(unsigned int start_address, + unsigned int range_address); +void ddrc_inline_ecc_scrub_end(unsigned int start_address, + unsigned int range_address); /* utils function for ddr phy training */ int wait_ddrphy_training_complete(void); diff --git a/board/freescale/imx8mp_evk/lpddr4_timing.c b/board/freescale/imx8mp_evk/lpddr4_timing.c index 14542490bc..4e5ebf9424 100644 --- a/board/freescale/imx8mp_evk/lpddr4_timing.c +++ b/board/freescale/imx8mp_evk/lpddr4_timing.c @@ -14,6 +14,9 @@ struct dram_cfg_param ddr_ddrc_cfg[] = { { 0x3d400020, 0x323 }, { 0x3d400024, 0x1e84800 }, { 0x3d400064, 0x7a0118 }, +#ifdef CONFIG_IMX8M_DRAM_INLINE_ECC + { 0x3d400070, 0x01027f44 }, +#endif { 0x3d4000d0, 0xc00307a3 }, { 0x3d4000d4, 0xc50000 }, { 0x3d4000dc, 0xf4003f }, @@ -45,12 +48,21 @@ struct dram_cfg_param ddr_ddrc_cfg[] = { { 0x3d4001c4, 0x1 }, { 0x3d4000f4, 0xc99 }, { 0x3d400108, 0x9121c1c }, +#ifdef CONFIG_IMX8M_DRAM_INLINE_ECC + { 0x3d400200, 0x13 }, + { 0x3d40020c, 0x13131300 }, + { 0x3d400210, 0x1f1f }, + { 0x3d400204, 0x50505 }, + { 0x3d400214, 0x4040404 }, + { 0x3d400218, 0x68040404 }, +#else { 0x3d400200, 0x16 }, { 0x3d40020c, 0x0 }, { 0x3d400210, 0x1f1f }, { 0x3d400204, 0x80808 }, { 0x3d400214, 0x7070707 }, { 0x3d400218, 0x68070707 }, +#endif { 0x3d40021c, 0xf08 }, { 0x3d400250, 0x29001701 }, { 0x3d400254, 0x2c }, @@ -1845,3 +1857,18 @@ struct dram_timing_info dram_timing = { .ddrphy_pie_num = ARRAY_SIZE(ddr_phy_pie), .fsp_table = { 4000, 400, 100, }, }; + +#ifdef CONFIG_IMX8M_DRAM_INLINE_ECC +void board_dram_ecc_scrub(void) +{ + /* add inline scrb function MPlus spcific */ + /* scrub 0-1.75G */ + ddrc_inline_ecc_scrub(0x0, 0x1bffffff); + /* scrub 2-3.75G */ + ddrc_inline_ecc_scrub(0x20000000, 0x3bffffff); + /* scrub 4-5.75G */ + ddrc_inline_ecc_scrub(0x40000000, 0x5bffffff); + /* set scruber read range 0-6G */ + ddrc_inline_ecc_scrub_end(0x0, 0x5fffffff); +} +#endif diff --git a/drivers/ddr/imx/imx8m/Kconfig b/drivers/ddr/imx/imx8m/Kconfig index 5bf61eb258..a5f5524fbe 100644 --- a/drivers/ddr/imx/imx8m/Kconfig +++ b/drivers/ddr/imx/imx8m/Kconfig @@ -29,4 +29,11 @@ config SAVED_DRAM_TIMING_BASE info into memory for low power use. OCRAM_S is used for this purpose on i.MX8MM. default 0x180000 + +config IMX8M_DRAM_INLINE_ECC + bool "imx8mp inline ECC" + depends on IMX8MP && IMX8M_LPDDR4 + help + Select this config if you want to use inline ecc feature for + imx8mp-evk board. endmenu diff --git a/drivers/ddr/imx/imx8m/ddr_init.c b/drivers/ddr/imx/imx8m/ddr_init.c index 06b4341b11..f573a778d9 100644 --- a/drivers/ddr/imx/imx8m/ddr_init.c +++ b/drivers/ddr/imx/imx8m/ddr_init.c @@ -20,6 +20,76 @@ void ddr_cfg_umctl2(struct dram_cfg_param *ddrc_cfg, int num) } } +#ifdef CONFIG_IMX8M_DRAM_INLINE_ECC +void ddrc_inline_ecc_scrub(unsigned int start_address, + unsigned int range_address) +{ + unsigned int tmp; + + /* Step1: Enable quasi-dynamic programming */ + reg32_write(DDRC_SWCTL(0), 0x00000000); + /* Step2: Set ECCCFG1.ecc_parity_region_lock to 1 */ + reg32setbit(DDRC_ECCCFG1(0), 0x4); + /* Step3: Block the AXI ports from taking the transaction */ + reg32_write(DDRC_PCTRL_0(0), 0x0); + /* Step4: Set scrub start address */ + reg32_write(DDRC_SBRSTART0(0), start_address); + /* Step5: Set scrub range address */ + reg32_write(DDRC_SBRRANGE0(0), range_address); + /* Step6: Set scrub_mode to write */ + reg32_write(DDRC_SBRCTL(0), 0x00000014); + /* Step7: Set the desired pattern through SBRWDATA0 registers */ + reg32_write(DDRC_SBRWDATA0(0), 0x55aa55aa); + /* Step8: Enable the SBR by programming SBRCTL.scrub_en=1 */ + reg32setbit(DDRC_SBRCTL(0), 0x0); + /* Step9: Poll SBRSTAT.scrub_done=1 */ + tmp = reg32_read(DDRC_SBRSTAT(0)); + while (tmp != 0x00000002) + tmp = reg32_read(DDRC_SBRSTAT(0)) & 0x2; + /* Step10: Poll SBRSTAT.scrub_busy=0 */ + tmp = reg32_read(DDRC_SBRSTAT(0)); + while (tmp != 0x0) + tmp = reg32_read(DDRC_SBRSTAT(0)) & 0x1; + /* Step11: Disable SBR by programming SBRCTL.scrub_en=0 */ + clrbits_le32(DDRC_SBRCTL(0), 0x1); + /* Step12: Prepare for normal scrub operation(Read) and set scrub_interval*/ + reg32_write(DDRC_SBRCTL(0), 0x100); + /* Step13: Enable the SBR by programming SBRCTL.scrub_en=1 */ + reg32_write(DDRC_SBRCTL(0), 0x101); + /* Step14: Enable AXI ports by programming */ + reg32_write(DDRC_PCTRL_0(0), 0x1); + /* Step15: Disable quasi-dynamic programming */ + reg32_write(DDRC_SWCTL(0), 0x00000001); +} + +void ddrc_inline_ecc_scrub_end(unsigned int start_address, + unsigned int range_address) +{ + /* Step1: Enable quasi-dynamic programming */ + reg32_write(DDRC_SWCTL(0), 0x00000000); + /* Step2: Block the AXI ports from taking the transaction */ + reg32_write(DDRC_PCTRL_0(0), 0x0); + /* Step3: Set scrub start address */ + reg32_write(DDRC_SBRSTART0(0), start_address); + /* Step4: Set scrub range address */ + reg32_write(DDRC_SBRRANGE0(0), range_address); + /* Step5: Disable SBR by programming SBRCTL.scrub_en=0 */ + clrbits_le32(DDRC_SBRCTL(0), 0x1); + /* Step6: Prepare for normal scrub operation(Read) and set scrub_interval */ + reg32_write(DDRC_SBRCTL(0), 0x100); + /* Step7: Enable the SBR by programming SBRCTL.scrub_en=1 */ + reg32_write(DDRC_SBRCTL(0), 0x101); + /* Step8: Enable AXI ports by programming */ + reg32_write(DDRC_PCTRL_0(0), 0x1); + /* Step9: Disable quasi-dynamic programming */ + reg32_write(DDRC_SWCTL(0), 0x00000001); +} +#endif + +void __weak board_dram_ecc_scrub(void) +{ +} + int ddr_init(struct dram_timing_info *dram_timing) { unsigned int tmp, initial_drate, target_freq; @@ -168,6 +238,8 @@ int ddr_init(struct dram_timing_info *dram_timing) reg32_write(DDRC_PCTRL_0(0), 0x00000001); debug("DDRINFO: ddrmix config done\n"); + board_dram_ecc_scrub(); + /* save the dram timing config into memory */ dram_config_save(dram_timing, CONFIG_SAVED_DRAM_TIMING_BASE); -- 2.16.4
