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authorYuan Yao <yao.yuan@nxp.com>2016-12-01 10:13:52 +0800
committerYork Sun <york.sun@nxp.com>2016-12-05 08:32:43 -0800
commitdd2ad2f1318975da1cf64cf95a4a3b3ed44172a5 (patch)
treed62dd89827ccfc6d565d80e6d3719ec068d2b3ea /arch/arm/cpu/armv8
parent8545c5415f489caafc2e686dd43eaffc9228c460 (diff)
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armv8: QSPI: Add AHB bus 16MB+ size support
The default configuration for QSPI AHB bus can't support 16MB+. But some flash on NXP layerscape board are more than 16MB. Signed-off-by: Yuan Yao <yao.yuan@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
Diffstat (limited to 'arch/arm/cpu/armv8')
-rw-r--r--arch/arm/cpu/armv8/fsl-layerscape/Kconfig7
-rw-r--r--arch/arm/cpu/armv8/fsl-layerscape/soc.c42
2 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index ed1c4ee..6772584 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -76,6 +76,13 @@ config SECURE_BOOT
help
Enable Freescale Secure Boot feature
+config QSPI_AHB_INIT
+ bool "Init the QSPI AHB bus"
+ help
+ The default setting for QSPI AHB bus just support 3bytes addressing.
+ 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 SYS_FSL_IFC_BANK_COUNT
int "Maximum banks of Integrated flash controller"
depends on ARCH_LS1043A || ARCH_LS1046A || ARCH_LS2080A
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
index 6c42387..2f54625 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
@@ -373,6 +373,45 @@ void fsl_lsch2_early_init_f(void)
}
#endif
+#ifdef CONFIG_QSPI_AHB_INIT
+/* Enable 4bytes address support and fast read */
+int qspi_ahb_init(void)
+{
+ u32 *qspi_lut, lut_key, *qspi_key;
+
+ qspi_key = (void *)SYS_FSL_QSPI_ADDR + 0x300;
+ qspi_lut = (void *)SYS_FSL_QSPI_ADDR + 0x310;
+
+ lut_key = in_be32(qspi_key);
+
+ if (lut_key == 0x5af05af0) {
+ /* That means the register is BE */
+ out_be32(qspi_key, 0x5af05af0);
+ /* Unlock the lut table */
+ out_be32(qspi_key + 1, 0x00000002);
+ out_be32(qspi_lut, 0x0820040c);
+ out_be32(qspi_lut + 1, 0x1c080c08);
+ out_be32(qspi_lut + 2, 0x00002400);
+ /* Lock the lut table */
+ out_be32(qspi_key, 0x5af05af0);
+ out_be32(qspi_key + 1, 0x00000001);
+ } else {
+ /* That means the register is LE */
+ out_le32(qspi_key, 0x5af05af0);
+ /* Unlock the lut table */
+ out_le32(qspi_key + 1, 0x00000002);
+ out_le32(qspi_lut, 0x0820040c);
+ out_le32(qspi_lut + 1, 0x1c080c08);
+ out_le32(qspi_lut + 2, 0x00002400);
+ /* Lock the lut table */
+ out_le32(qspi_key, 0x5af05af0);
+ out_le32(qspi_key + 1, 0x00000001);
+ }
+
+ return 0;
+}
+#endif
+
#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
@@ -382,6 +421,9 @@ int board_late_init(void)
#ifdef CONFIG_CHAIN_OF_TRUST
fsl_setenv_chain_of_trust();
#endif
+#ifdef CONFIG_QSPI_AHB_INIT
+ qspi_ahb_init();
+#endif
return 0;
}