Exports the serdes configuration as an environment variable for LS gen 3
SoCs, so it can be used in u-boot command line. It should particularly
be useful for applying Linux DT overlays for the given serdes
configuration.
This code is called from arch_misc_init and not from the existing
serdes_init function because it depends on U-Boot environment being set
up.
Signed-off-by: Alex Marginean <alexandru.margin...@nxp.com>
---
arch/arm/cpu/armv8/fsl-layerscape/Kconfig | 1 +
arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 14 ++++++
.../armv8/fsl-layerscape/fsl_lsch3_serdes.c | 43 +++++++++++++++++++
3 files changed, 58 insertions(+)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index f1578b10bc..40cbea0e12 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -241,6 +241,7 @@ config FSL_LSCH2
select SYS_FSL_SEC_BE
config FSL_LSCH3
+ select ARCH_MISC_INIT
bool
config NXP_LSCH3_2
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index c6490556e6..ddbc07037f 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -1627,3 +1627,17 @@ __weak int dram_init(void)
return 0;
}
+
+#ifdef CONFIG_ARCH_MISC_INIT
+__weak int serdes_misc_init(void)
+{
+ return 0;
+}
+
+int arch_misc_init(void)
+{
+ serdes_misc_init();
+
+ return 0;
+}
+#endif
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
index 1a747a9e3d..8b9f5a4e29 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
@@ -600,3 +600,46 @@ void fsl_serdes_init(void)
serdes3_prtcl_map);
#endif
}
+
+int serdes_set_env(int sd, int rcwsr, int sd_prctl_mask, int sd_prctl_shift)
+{
+ struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
+ char scfg[16], snum[16];
+ int i, cfgr = 0;
+ u32 cfg;
+
+ cfg = gur_in32(&gur->rcwsr[rcwsr - 1]) & sd_prctl_mask;
+ cfg >>= sd_prctl_shift;
+ cfg = serdes_get_number(sd, cfg);
+
+ /* reverse lanes, lane 0 should be printed first */
+ for (i = 0; i < SRDS_MAX_LANES; i++)
+ cfgr |= (cfg >> (i * 4) & 0xf) << (SRDS_MAX_LANES - i - 1) * 4;
+
+ snprintf(snum, 16, "serdes%d", sd);
+ snprintf(scfg, 16, "%x", cfgr);
+ env_set(snum, scfg);
+
+ return 0;
+}
+
+int serdes_misc_init(void)
+{
+#ifdef CONFIG_SYS_FSL_SRDS_1
+ serdes_set_env(FSL_SRDS_1, FSL_CHASSIS3_SRDS1_REGSR,
+ FSL_CHASSIS3_SRDS1_PRTCL_MASK,
+ FSL_CHASSIS3_SRDS1_PRTCL_SHIFT);
+#endif
+#ifdef CONFIG_SYS_FSL_SRDS_2
+ serdes_set_env(FSL_SRDS_2, FSL_CHASSIS3_SRDS2_REGSR,
+ FSL_CHASSIS3_SRDS2_PRTCL_MASK,
+ FSL_CHASSIS3_SRDS2_PRTCL_SHIFT);
+#endif
+#ifdef CONFIG_SYS_NXP_SRDS_3
+ serdes_set_env(NXP_SRDS_3, FSL_CHASSIS3_SRDS3_REGSR,
+ FSL_CHASSIS3_SRDS3_PRTCL_MASK,
+ FSL_CHASSIS3_SRDS3_PRTCL_SHIFT);
+#endif
+
+ return 0;
+}
--
2.17.1
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