fsl: serdes: ensure accessing the initialized maps of serdes protocol

Up to now, the function is_serdes_configed() doesn't check if the map
of serdes protocol is initialized before accessing it. The function
is_serdes_configed() will get wrong result when it was called before
the serdes protocol maps initialized. As the first element of the map
isn't used for any device, so use it as the flag to indicate if the
map has been initialized.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/cpu/armv7/ls102xa/fsl_ls1_serdes.c

@@ -23,9 +23,15 @@ int is_serdes_configured(enum srds_prtcl device)
 	u64 ret = 0;
 
 #ifdef CONFIG_SYS_FSL_SRDS_1
+	if (!(serdes1_prtcl_map & (1ULL << NONE)))
+		fsl_serdes_init();
+
 	ret |= (1ULL << device) & serdes1_prtcl_map;
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_2
+	if (!(serdes2_prtcl_map & (1ULL << NONE)))
+		fsl_serdes_init();
+
 	ret |= (1ULL << device) & serdes2_prtcl_map;
 #endif
 
@@ -87,19 +93,24 @@ u64 serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift)
 		serdes_prtcl_map |= (1ULL << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes_prtcl_map |= (1ULL << NONE);
+
 	return serdes_prtcl_map;
 }
 
 void fsl_serdes_init(void)
 {
 #ifdef CONFIG_SYS_FSL_SRDS_1
-	serdes1_prtcl_map = serdes_init(FSL_SRDS_1,
+	if (!(serdes1_prtcl_map & (1ULL << NONE)))
+		serdes1_prtcl_map = serdes_init(FSL_SRDS_1,
 					CONFIG_SYS_FSL_SERDES_ADDR,
 					RCWSR4_SRDS1_PRTCL_MASK,
 					RCWSR4_SRDS1_PRTCL_SHIFT);
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_2
-	serdes2_prtcl_map = serdes_init(FSL_SRDS_2,
+	if (!(serdes2_prtcl_map & (1ULL << NONE)))
+		serdes2_prtcl_map = serdes_init(FSL_SRDS_2,
 					CONFIG_SYS_FSL_SERDES_ADDR +
 					FSL_SRDS_2 * 0x1000,
 					RCWSR4_SRDS2_PRTCL_MASK,

arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_serdes.c

@@ -22,9 +22,15 @@ int is_serdes_configured(enum srds_prtcl device)
 	int ret = 0;
 
 #ifdef CONFIG_SYS_FSL_SRDS_1
+	if (!serdes1_prtcl_map[NONE])
+		fsl_serdes_init();
+
 	ret |= serdes1_prtcl_map[device];
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_2
+	if (!serdes2_prtcl_map[NONE])
+		fsl_serdes_init();
+
 	ret |= serdes2_prtcl_map[device];
 #endif
 
@@ -98,6 +104,9 @@ void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 	u32 cfg;
 	int lane;
 
+	if (serdes_prtcl_map[NONE])
+		return;
+
 	memset(serdes_prtcl_map, 0, sizeof(u8) * SERDES_PRCTL_COUNT);
 
 	cfg = gur_in32(&gur->rcwsr[4]) & sd_prctl_mask;
@@ -115,6 +124,9 @@ void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 		else
 			serdes_prtcl_map[lane_prtcl] = 1;
 	}
+
+	/* Set the first element to indicate serdes has been initialized */
+	serdes_prtcl_map[NONE] = 1;
 }
 
 void fsl_serdes_init(void)

arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c

@@ -28,9 +28,15 @@ int is_serdes_configured(enum srds_prtcl device)
 	int ret = 0;
 
 #ifdef CONFIG_SYS_FSL_SRDS_1
+	if (!serdes1_prtcl_map[NONE])
+		fsl_serdes_init();
+
 	ret |= serdes1_prtcl_map[device];
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_2
+	if (!serdes2_prtcl_map[NONE])
+		fsl_serdes_init();
+
 	ret |= serdes2_prtcl_map[device];
 #endif
 
@@ -79,6 +85,9 @@ void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 	u32 cfg;
 	int lane;
 
+	if (serdes_prtcl_map[NONE])
+		return;
+
 	memset(serdes_prtcl_map, 0, sizeof(u8) * SERDES_PRCTL_COUNT);
 
 	cfg = gur_in32(&gur->rcwsr[28]) & sd_prctl_mask;
@@ -136,6 +145,9 @@ void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 #endif
 		}
 	}
+
+	/* Set the first element to indicate serdes has been initialized */
+	serdes_prtcl_map[NONE] = 1;
 }
 
 void fsl_serdes_init(void)

arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h

@@ -11,6 +11,10 @@
 
 #ifdef CONFIG_LS2080A
 enum srds_prtcl {
+	/*
+	 * Nobody will check whether the device 'NONE' has been configured,
+	 * So use it to indicate if the serdes_prtcl_map has been initialized.
+	 */
 	NONE = 0,
 	PCIE1,
 	PCIE2,
@@ -57,6 +61,10 @@ enum srds {
 };
 #elif defined(CONFIG_FSL_LSCH2)
 enum srds_prtcl {
+	/*
+	 * Nobody will check whether the device 'NONE' has been configured,
+	 * So use it to indicate if the serdes_prtcl_map has been initialized.
+	 */
 	NONE = 0,
 	PCIE1,
 	PCIE2,

arch/arm/include/asm/arch-ls102xa/fsl_serdes.h

@@ -10,6 +10,10 @@
 #include <config.h>
 
 enum srds_prtcl {
+	/*
+	 * Nobody will check whether the device 'NONE' has been configured,
+	 * So use it to indicate if the serdes_prtcl_map has been initialized.
+	 */
 	NONE = 0,
 	PCIE1,
 	PCIE2,

arch/powerpc/cpu/mpc85xx/bsc9132_serdes.c

@@ -68,6 +68,9 @@ static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl prtcl)
 {
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << prtcl) & serdes1_prtcl_map;
 }
 
@@ -79,6 +82,9 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -90,4 +96,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/c29x_serdes.c

@@ -32,6 +32,9 @@ static const struct serdes_config serdes1_cfg_tbl[] = {
 
 int is_serdes_configured(enum srds_prtcl device)
 {
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << device) & serdes1_prtcl_map;
 }
 
@@ -44,6 +47,9 @@ void fsl_serdes_init(void)
 	const struct serdes_config *ptr;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg > ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -59,4 +65,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = ptr->lanes[lane];
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/fsl_corenet2_serdes.c

@@ -92,15 +92,27 @@ int is_serdes_configured(enum srds_prtcl device)
 	int ret = 0;
 
 #ifdef CONFIG_SYS_FSL_SRDS_1
+	if (!serdes1_prtcl_map[NONE])
+		fsl_serdes_init();
+
 	ret |= serdes1_prtcl_map[device];
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_2
+	if (!serdes2_prtcl_map[NONE])
+		fsl_serdes_init();
+
 	ret |= serdes2_prtcl_map[device];
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_3
+	if (!serdes3_prtcl_map[NONE])
+		fsl_serdes_init();
+
 	ret |= serdes3_prtcl_map[device];
 #endif
 #ifdef CONFIG_SYS_FSL_SRDS_4
+	if (!serdes4_prtcl_map[NONE])
+		fsl_serdes_init();
+
 	ret |= serdes4_prtcl_map[device];
 #endif
 
@@ -184,6 +196,9 @@ void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 	u32 cfg;
 	int lane;
 
+	if (serdes_prtcl_map[NONE])
+		return;
+
 	memset(serdes_prtcl_map, 0, sizeof(u8) * SERDES_PRCTL_COUNT);
 #ifdef CONFIG_SYS_FSL_ERRATUM_A007186
 	struct ccsr_sfp_regs  __iomem *sfp_regs =
@@ -325,6 +340,9 @@ void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 		else
 			serdes_prtcl_map[lane_prtcl] = 1;
 	}
+
+	/* Set the first element to indicate serdes has been initialized */
+	serdes_prtcl_map[NONE] = 1;
 }
 
 void fsl_serdes_init(void)

arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c

@@ -136,6 +136,9 @@ int is_serdes_configured(enum srds_prtcl device)
 	if (!(in_be32(&gur->rcwsr[5]) & FSL_CORENET_RCWSR5_SRDS_EN))
 		return 0;
 
+	if (!(serdes_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << device) & serdes_prtcl_map;
 }
 
@@ -514,6 +517,8 @@ void fsl_serdes_init(void)
 	if (getenv_f("hwconfig", buffer, sizeof(buffer)) > 0)
 		buf = buffer;
 #endif
+	if (serdes_prtcl_map & (1 << NONE))
+		return;
 
 	/* Is serdes enabled at all? */
 	if (!(in_be32(&gur->rcwsr[5]) & FSL_CORENET_RCWSR5_SRDS_EN))
@@ -857,6 +862,9 @@ void fsl_serdes_init(void)
 			     SRDS_RSTCTL_SDPD);
 	}
 #endif
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes_prtcl_map |= (1 << NONE);
 }
 
 const char *serdes_clock_to_string(u32 clock)

arch/powerpc/cpu/mpc85xx/mpc8536_serdes.c

@@ -71,11 +71,19 @@ static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl device)
 {
-	int ret = (1 << device) & serdes1_prtcl_map;
+	int ret;
+
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
+	ret = (1 << device) & serdes1_prtcl_map;
 
 	if (ret)
 		return ret;
 
+	if (!(serdes2_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << device) & serdes2_prtcl_map;
 }
 
@@ -88,6 +96,10 @@ void fsl_serdes_init(void)
 	u32 tmp;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE) &&
+	    serdes2_prtcl_map & (1 << NONE))
+		return;
+
 	srds1_io_sel = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 
@@ -221,6 +233,9 @@ void fsl_serdes_init(void)
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
+
 	if (srds2_io_sel >= ARRAY_SIZE(serdes2_cfg_tbl)) {
 		printf("Invalid PORDEVSR[SRDS2_IO_SEL] = %d\n", srds2_io_sel);
 		return;
@@ -230,4 +245,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds2_io_sel][lane];
 		serdes2_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes2_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/mpc8544_serdes.c

@@ -34,11 +34,19 @@ static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl device)
 {
-	int ret = (1 << device) & serdes1_prtcl_map;
+	int ret;
+
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
+	ret = (1 << device) & serdes1_prtcl_map;
 
 	if (ret)
 		return ret;
 
+	if (!(serdes2_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << device) & serdes2_prtcl_map;
 }
 
@@ -50,6 +58,10 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE) &&
+	    serdes2_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -61,6 +73,9 @@ void fsl_serdes_init(void)
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
+
 	if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
 		return;
@@ -76,4 +91,7 @@ void fsl_serdes_init(void)
 
 	if (pordevsr & MPC85xx_PORDEVSR_SGMII3_DIS)
 		serdes2_prtcl_map &= ~(1 << SGMII_TSEC3);
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes2_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/mpc8548_serdes.c

@@ -24,6 +24,9 @@ static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl prtcl)
 {
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << prtcl) & serdes1_prtcl_map;
 }
 
@@ -35,6 +38,9 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL] = %x\n", srds1_cfg);
 
 	if (srds1_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -46,4 +52,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds1_cfg][lane];
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/mpc8568_serdes.c

@@ -24,6 +24,9 @@ static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl prtcl)
 {
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << prtcl) & serdes1_prtcl_map;
 }
 
@@ -35,6 +38,9 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -46,4 +52,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/mpc8569_serdes.c

@@ -33,6 +33,9 @@ static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl prtcl)
 {
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << prtcl) & serdes1_prtcl_map;
 }
 
@@ -44,6 +47,9 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -55,4 +61,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/mpc8572_serdes.c

@@ -28,6 +28,9 @@ static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl prtcl)
 {
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << prtcl) & serdes1_prtcl_map;
 }
 
@@ -39,6 +42,9 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -62,4 +68,7 @@ void fsl_serdes_init(void)
 
 	if (!(pordevsr & MPC85xx_PORDEVSR_SGMII4_DIS))
 		serdes1_prtcl_map |= (1 << SGMII_TSEC4);
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/p1010_serdes.c

@@ -33,11 +33,19 @@ static const u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl device)
 {
-	int ret = (1 << device) & serdes1_prtcl_map;
+	int ret;
+
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
+	ret = (1 << device) & serdes1_prtcl_map;
 
 	if (ret)
 		return ret;
 
+	if (!(serdes2_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << device) & serdes2_prtcl_map;
 }
 
@@ -49,6 +57,10 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE) &&
+	    serdes2_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -60,6 +72,9 @@ void fsl_serdes_init(void)
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
+
 	if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
 		return;
@@ -69,4 +84,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
 		serdes2_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes2_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/p1021_serdes.c

@@ -41,6 +41,9 @@ static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl prtcl)
 {
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << prtcl) & serdes1_prtcl_map;
 }
 
@@ -55,6 +58,9 @@ void fsl_serdes_init(void)
 	int lane;
 	u32 mask, val;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -67,6 +73,9 @@ void fsl_serdes_init(void)
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
+
 	/* Init SERDES Receiver electrical idle detection control for PCIe */
 
 	/* Lane 0 is always PCIe 1 */

arch/powerpc/cpu/mpc85xx/p1022_serdes.c

@@ -72,11 +72,19 @@ static const u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl device)
 {
-	int ret = (1 << device) & serdes1_prtcl_map;
+	int ret;
+
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
+	ret = (1 << device) & serdes1_prtcl_map;
 
 	if (ret)
 		return ret;
 
+	if (!(serdes2_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << device) & serdes2_prtcl_map;
 }
 
@@ -88,6 +96,10 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE) &&
+	    serdes2_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -99,6 +111,9 @@ void fsl_serdes_init(void)
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
+
 	if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
 		return;
@@ -108,4 +123,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
 		serdes2_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes2_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/p1023_serdes.c

@@ -24,7 +24,12 @@ static const u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl device)
 {
-	int ret = (1 << device) & serdes1_prtcl_map;
+	int ret;
+
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
+	ret = (1 << device) & serdes1_prtcl_map;
 	return ret;
 }
 
@@ -36,6 +41,9 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -47,4 +55,6 @@ void fsl_serdes_init(void)
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc85xx/p2020_serdes.c

@@ -32,6 +32,9 @@ static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl prtcl)
 {
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << prtcl) & serdes1_prtcl_map;
 }
 
@@ -43,6 +46,9 @@ void fsl_serdes_init(void)
 				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -54,4 +60,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc86xx/mpc8610_serdes.c

@@ -29,11 +29,19 @@ static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl device)
 {
-	int ret = (1 << device) & serdes1_prtcl_map;
+	int ret;
+
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
+	ret = (1 << device) & serdes1_prtcl_map;
 
 	if (ret)
 		return ret;
 
+	if (!(serdes2_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << device) & serdes2_prtcl_map;
 }
 
@@ -46,6 +54,10 @@ void fsl_serdes_init(void)
 				MPC8610_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE) &&
+	    serdes2_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -57,6 +69,9 @@ void fsl_serdes_init(void)
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
+
 	if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
 		return;
@@ -66,4 +81,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
 		serdes2_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes2_prtcl_map |= (1 << NONE);
 }

arch/powerpc/cpu/mpc86xx/mpc8641_serdes.c

@@ -38,11 +38,19 @@ static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
 
 int is_serdes_configured(enum srds_prtcl device)
 {
-	int ret = (1 << device) & serdes1_prtcl_map;
+	int ret;
+
+	if (!(serdes1_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
+	ret = (1 << device) & serdes1_prtcl_map;
 
 	if (ret)
 		return ret;
 
+	if (!(serdes2_prtcl_map & (1 << NONE)))
+		fsl_serdes_init();
+
 	return (1 << device) & serdes2_prtcl_map;
 }
 
@@ -55,6 +63,10 @@ void fsl_serdes_init(void)
 				MPC8641_PORDEVSR_IO_SEL_SHIFT;
 	int lane;
 
+	if (serdes1_prtcl_map & (1 << NONE) &&
+	    serdes2_prtcl_map & (1 << NONE))
+		return;
+
 	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
 
 	if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
@@ -66,6 +78,9 @@ void fsl_serdes_init(void)
 		serdes1_prtcl_map |= (1 << lane_prtcl);
 	}
 
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes1_prtcl_map |= (1 << NONE);
+
 	if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
 		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
 		return;
@@ -75,4 +90,7 @@ void fsl_serdes_init(void)
 		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
 		serdes2_prtcl_map |= (1 << lane_prtcl);
 	}
+
+	/* Set the first bit to indicate serdes has been initialized */
+	serdes2_prtcl_map |= (1 << NONE);
 }

arch/powerpc/include/asm/fsl_serdes.h

@@ -10,6 +10,10 @@
 #include <config.h>
 
 enum srds_prtcl {
+	/*
+	 * Nobody will check whether the device 'NONE' has been configured,
+	 * So use it to indicate if the serdes_prtcl_map has been initialized.
+	 */
 	NONE = 0,
 	PCIE1,
 	PCIE2,