[U-Boot] [PATCH v2] armv8:fsl-layerscape: Avoid RCWSR28 register hard-coding

[Ashish Kumar]

From: Prabhakar Kushwaha <prabhakar.kushwaha at nxp.com>

SerDes information is not necessary to be present in RCWSR29 register.
It may vary from SoC to SoC.

So Avoid RCWSR28 register hard-coding.

Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha at nxp.com>
Signed-off-by: Ashish Kumar <Ashish.Kumar at nxp.com>
---
v2:
Incorporate York's Review comments

 .../cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c    | 28 ++++++++++++----------
 .../include/asm/arch-fsl-layerscape/immap_lsch3.h  |  9 +++++++
 2 files changed, 25 insertions(+), 12 deletions(-)

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 c2fc646..955e0b7 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c
@@ -51,20 +51,22 @@ int is_serdes_configured(enum srds_prtcl device)
 int serdes_get_first_lane(u32 sd, enum srds_prtcl device)
 {
 	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
-	u32 cfg = gur_in32(&gur->rcwsr[28]);
+	u32 cfg = 0;
 	int i;
 
 	switch (sd) {
 #ifdef CONFIG_SYS_FSL_SRDS_1
 	case FSL_SRDS_1:
-		cfg &= FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK;
-		cfg >>= FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT;
+		cfg = gur_in32(&gur->rcwsr[FSL_CHASSIS3_SRDS1_REGSR - 1]);
+		cfg &= FSL_CHASSIS3_SRDS1_PRTCL_MASK;
+		cfg >>= FSL_CHASSIS3_SRDS1_PRTCL_SHIFT;
 		break;
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_2
 	case FSL_SRDS_2:
-		cfg &= FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK;
-		cfg >>= FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT;
+		cfg = gur_in32(&gur->rcwsr[FSL_CHASSIS3_SRDS2_REGSR - 1]);
+		cfg &= FSL_CHASSIS3_SRDS2_PRTCL_MASK;
+		cfg >>= FSL_CHASSIS3_SRDS2_PRTCL_SHIFT;
 		break;
 #endif
 	default:
@@ -83,8 +85,8 @@ int serdes_get_first_lane(u32 sd, enum srds_prtcl device)
 	return -ENODEV;
 }
 
-void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
-		u8 serdes_prtcl_map[SERDES_PRCTL_COUNT])
+void serdes_init(u32 sd, u32 sd_addr, u32 rcwsr, u32 sd_prctl_mask,
+		 u32 sd_prctl_shift, u8 serdes_prtcl_map[SERDES_PRCTL_COUNT])
 {
 	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
 	u32 cfg;
@@ -95,7 +97,7 @@ void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 
 	memset(serdes_prtcl_map, 0, sizeof(u8) * SERDES_PRCTL_COUNT);
 
-	cfg = gur_in32(&gur->rcwsr[28]) & sd_prctl_mask;
+	cfg = gur_in32(&gur->rcwsr[rcwsr - 1]) & sd_prctl_mask;
 	cfg >>= sd_prctl_shift;
 	printf("Using SERDES%d Protocol: %d (0x%x)\n", sd + 1, cfg, cfg);
 
@@ -152,15 +154,17 @@ void fsl_serdes_init(void)
 #ifdef CONFIG_SYS_FSL_SRDS_1
 	serdes_init(FSL_SRDS_1,
 		    CONFIG_SYS_FSL_LSCH3_SERDES_ADDR,
-		    FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK,
-		    FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT,
+		    FSL_CHASSIS3_SRDS1_REGSR,
+		    FSL_CHASSIS3_SRDS1_PRTCL_MASK,
+		    FSL_CHASSIS3_SRDS1_PRTCL_SHIFT,
 		    serdes1_prtcl_map);
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_2
 	serdes_init(FSL_SRDS_2,
 		    CONFIG_SYS_FSL_LSCH3_SERDES_ADDR + FSL_SRDS_2 * 0x10000,
-		    FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK,
-		    FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT,
+		    FSL_CHASSIS3_SRDS2_REGSR,
+		    FSL_CHASSIS3_SRDS2_PRTCL_MASK,
+		    FSL_CHASSIS3_SRDS2_PRTCL_SHIFT,
 		    serdes2_prtcl_map);
 #endif
 }
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
index 43ae686..0678fba 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
@@ -232,10 +232,19 @@ struct ccsr_gur {
 #define FSL_CHASSIS3_RCWSR0_MEM_PLL_RAT_MASK	0x3f
 #define FSL_CHASSIS3_RCWSR0_MEM2_PLL_RAT_SHIFT	18
 #define FSL_CHASSIS3_RCWSR0_MEM2_PLL_RAT_MASK	0x3f
+
+#if defined(CONFIG_ARCH_LS2080A)
 #define	FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK	0x00FF0000
 #define	FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT	16
 #define	FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK	0xFF000000
 #define	FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT	24
+#define FSL_CHASSIS3_SRDS1_PRTCL_MASK	FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK
+#define FSL_CHASSIS3_SRDS1_PRTCL_SHIFT	FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT
+#define FSL_CHASSIS3_SRDS2_PRTCL_MASK	FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK
+#define FSL_CHASSIS3_SRDS2_PRTCL_SHIFT	FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT
+#define FSL_CHASSIS3_SRDS1_REGSR	29
+#define FSL_CHASSIS3_SRDS2_REGSR	29
+#endif
 #define RCW_SB_EN_REG_INDEX	9
 #define RCW_SB_EN_MASK		0x00000400
 
-- 
1.9.1