Enable AHB support for Flexspi controller interface meaning memory can be accessed via md command using absolute addresses
Signed-off-by: Yogesh Gaur yogeshnarayan.gaur@nxp.com Signed-off-by: Ashish Kumar Ashish.Kumar@nxp.com Signed-off-by: Rajat Srivastava rajat.srivastava@nxp.com --- v4: - Remove unnecessary dependencies of FSPI_AHB_EN_4BYTE config - Enable this config by default
arch/arm/cpu/armv8/fsl-layerscape/Kconfig | 9 ++++ arch/arm/cpu/armv8/fsl-layerscape/soc.c | 44 +++++++++++++++++++ .../arm/include/asm/arch-fsl-layerscape/soc.h | 7 +++ 3 files changed, 60 insertions(+)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig index f48481f465..5151308f96 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig +++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig @@ -374,6 +374,15 @@ config QSPI_AHB_INIT But some QSPI flash size up to 64MBytes, so initialize the QSPI AHB bus for those flashes to support the full QSPI flash size.
+config FSPI_AHB_EN_4BYTE + bool "Enable 4-byte Fast Read command for AHB mode" + default y + help + The default setting for FlexSPI AHB bus just supports 3-byte addressing. + But some FlexSPI flash sizes are up to 64MBytes. + This flag enables fast read command for AHB mode and modifies required + LUT to support full FlexSPI flash. + config SYS_CCI400_OFFSET hex "Offset for CCI400 base" depends on SYS_FSL_HAS_CCI400 diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c index 06f3edb302..a38f3ebb47 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c @@ -644,6 +644,47 @@ void fsl_lsch2_early_init_f(void) } #endif
+#ifdef CONFIG_FSPI_AHB_EN_4BYTE +int fspi_ahb_init(void) +{ + /* Enable 4bytes address support and fast read */ + u32 *fspi_lut, lut_key, *fspi_key; + + fspi_key = (void *)SYS_NXP_FSPI_ADDR + SYS_NXP_FSPI_LUTKEY_BASE_ADDR; + fspi_lut = (void *)SYS_NXP_FSPI_ADDR + SYS_NXP_FSPI_LUT_BASE_ADDR; + + lut_key = in_be32(fspi_key); + + if (lut_key == SYS_NXP_FSPI_LUTKEY) { + /* That means the register is BE */ + out_be32(fspi_key, SYS_NXP_FSPI_LUTKEY); + /* Unlock the lut table */ + out_be32(fspi_key + 1, SYS_NXP_FSPI_LUTCR_UNLOCK); + /* Create READ LUT */ + out_be32(fspi_lut, 0x0820040c); + out_be32(fspi_lut + 1, 0x24003008); + out_be32(fspi_lut + 2, 0x00000000); + /* Lock the lut table */ + out_be32(fspi_key, SYS_NXP_FSPI_LUTKEY); + out_be32(fspi_key + 1, SYS_NXP_FSPI_LUTCR_LOCK); + } else { + /* That means the register is LE */ + out_le32(fspi_key, SYS_NXP_FSPI_LUTKEY); + /* Unlock the lut table */ + out_le32(fspi_key + 1, SYS_NXP_FSPI_LUTCR_UNLOCK); + /* Create READ LUT */ + out_le32(fspi_lut, 0x0820040c); + out_le32(fspi_lut + 1, 0x24003008); + out_le32(fspi_lut + 2, 0x00000000); + /* Lock the lut table */ + out_le32(fspi_key, SYS_NXP_FSPI_LUTKEY); + out_le32(fspi_key + 1, SYS_NXP_FSPI_LUTCR_LOCK); + } + + return 0; +} +#endif + #ifdef CONFIG_QSPI_AHB_INIT /* Enable 4bytes address support and fast read */ int qspi_ahb_init(void) @@ -827,6 +868,9 @@ int board_late_init(void) #ifdef CONFIG_QSPI_AHB_INIT qspi_ahb_init(); #endif +#ifdef CONFIG_FSPI_AHB_EN_4BYTE + fspi_ahb_init(); +#endif
return 0; } diff --git a/arch/arm/include/asm/arch-fsl-layerscape/soc.h b/arch/arm/include/asm/arch-fsl-layerscape/soc.h index 7d95c4e2f5..a09d382112 100644 --- a/arch/arm/include/asm/arch-fsl-layerscape/soc.h +++ b/arch/arm/include/asm/arch-fsl-layerscape/soc.h @@ -133,6 +133,13 @@ void init_pfe_scfg_dcfg_regs(void); int qspi_ahb_init(void); #endif
+#ifdef CONFIG_FSPI_AHB_EN_4BYTE +#define SYS_NXP_FSPI_LUTCR_LOCK 0x00000001 +#define SYS_NXP_FSPI_LUTCR_UNLOCK 0x00000002 +#define SYS_NXP_FSPI_LUTKEY 0x5AF05AF0 +int fspi_ahb_init(void); +#endif + void cpu_name(char *name); #ifdef CONFIG_SYS_FSL_ERRATUM_A009635 void erratum_a009635(void);