From: Kishon Vijay Abraham I kishon@ti.com
Add a new API to perform iodelay recalibration without isolate io to be used in uboot.
The data manual of J6/J6 Eco recommends to set different IODELAY values depending on the mode in which the MMC/SD is enumerated in order to ensure IO timings are met. The MMC driver can use the new API to set the IO delay values depending on the MMC mode.
Signed-off-by: Kishon Vijay Abraham I kishon@ti.com Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com ---
Changes in v3: None
arch/arm/include/asm/arch-omap5/dra7xx_iodelay.h | 3 +++ arch/arm/mach-omap2/omap5/dra7xx_iodelay.c | 30 ++++++++++++++++++++++++ include/configs/am57xx_evm.h | 2 -- include/configs/dra7xx_evm.h | 2 -- 4 files changed, 33 insertions(+), 4 deletions(-)
diff --git a/arch/arm/include/asm/arch-omap5/dra7xx_iodelay.h b/arch/arm/include/asm/arch-omap5/dra7xx_iodelay.h index c997004..a8780ee 100644 --- a/arch/arm/include/asm/arch-omap5/dra7xx_iodelay.h +++ b/arch/arm/include/asm/arch-omap5/dra7xx_iodelay.h @@ -83,6 +83,9 @@ void __recalibrate_iodelay(struct pad_conf_entry const *pad, int npads, struct iodelay_cfg_entry const *iodelay, int niodelays); +void late_recalibrate_iodelay(struct pad_conf_entry const *pad, int npads, + struct iodelay_cfg_entry const *iodelay, + int niodelays); int __recalibrate_iodelay_start(void); void __recalibrate_iodelay_end(int ret);
diff --git a/arch/arm/mach-omap2/omap5/dra7xx_iodelay.c b/arch/arm/mach-omap2/omap5/dra7xx_iodelay.c index 8798730..a9a9f75 100644 --- a/arch/arm/mach-omap2/omap5/dra7xx_iodelay.c +++ b/arch/arm/mach-omap2/omap5/dra7xx_iodelay.c @@ -272,3 +272,33 @@ err: __recalibrate_iodelay_end(ret);
} + +void late_recalibrate_iodelay(struct pad_conf_entry const *pad, int npads, + struct iodelay_cfg_entry const *iodelay, + int niodelays) +{ + int ret = 0; + + /* unlock IODELAY CONFIG registers */ + writel(CFG_IODELAY_UNLOCK_KEY, (*ctrl)->iodelay_config_base + + CFG_REG_8_OFFSET); + + ret = calibrate_iodelay((*ctrl)->iodelay_config_base); + if (ret) + goto err; + + ret = update_delay_mechanism((*ctrl)->iodelay_config_base); + + /* Configure Mux settings */ + do_set_mux32((*ctrl)->control_padconf_core_base, pad, npads); + + /* Configure Manual IO timing modes */ + ret = do_set_iodelay((*ctrl)->iodelay_config_base, iodelay, niodelays); + if (ret) + goto err; + +err: + /* lock IODELAY CONFIG registers */ + writel(CFG_IODELAY_LOCK_KEY, (*ctrl)->iodelay_config_base + + CFG_REG_8_OFFSET); +} diff --git a/include/configs/am57xx_evm.h b/include/configs/am57xx_evm.h index 7546b3f..65465d1 100644 --- a/include/configs/am57xx_evm.h +++ b/include/configs/am57xx_evm.h @@ -15,9 +15,7 @@ #include <environment/ti/dfu.h> #include <linux/sizes.h>
-#ifdef CONFIG_SPL_BUILD #define CONFIG_IODELAY_RECALIBRATION -#endif
#define CONFIG_NR_DRAM_BANKS 2
diff --git a/include/configs/dra7xx_evm.h b/include/configs/dra7xx_evm.h index ff90b6d..975e6fd 100644 --- a/include/configs/dra7xx_evm.h +++ b/include/configs/dra7xx_evm.h @@ -14,9 +14,7 @@
#include <environment/ti/dfu.h>
-#ifdef CONFIG_SPL_BUILD #define CONFIG_IODELAY_RECALIBRATION -#endif
#define CONFIG_VERY_BIG_RAM #define CONFIG_NR_DRAM_BANKS 2