powerpc/85xx: Add is_serdes_configured() support for MPC8544 SERDES

Add the ability to determine if a given IP block connected on SERDES is
configured.  This is useful for things like PCIe and SRIO since they are
only ever connected on SERDES.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/cpu/mpc85xx/Makefile

@@ -78,6 +78,7 @@ COBJS-$(CONFIG_FSL_CORENET) += fsl_corenet_serdes.o
 
 # SoC specific SERDES support
 COBJS-$(CONFIG_MPC8536) += mpc8536_serdes.o
+COBJS-$(CONFIG_MPC8544) += mpc8544_serdes.o
 COBJS-$(CONFIG_MPC8548) += mpc8548_serdes.o
 COBJS-$(CONFIG_MPC8568) += mpc8568_serdes.o
 COBJS-$(CONFIG_MPC8569) += mpc8569_serdes.o

arch/powerpc/cpu/mpc85xx/mpc8544_serdes.c

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/immap_85xx.h>
+#include <asm/fsl_serdes.h>
+
+#define SRDS1_MAX_LANES		8
+#define SRDS2_MAX_LANES		4
+
+static u32 serdes1_prtcl_map, serdes2_prtcl_map;
+
+static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
+	[0x2] = {PCIE1, PCIE1, PCIE1, PCIE1, NONE, NONE, NONE, NONE},
+	[0x3] = {PCIE1, PCIE1, PCIE1, PCIE1, NONE, NONE, NONE, NONE},
+	[0x4] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE2, PCIE2, PCIE2, PCIE2},
+	[0x5] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE2, PCIE2, PCIE2, PCIE2},
+	[0x6] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE2, PCIE2, PCIE2, PCIE2},
+	[0x7] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE2, PCIE2, PCIE2, PCIE2},
+};
+
+static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
+	[0x1] = {NONE, NONE, SGMII_TSEC1, SGMII_TSEC3},
+	[0x3] = {NONE, NONE, SGMII_TSEC1, SGMII_TSEC3},
+	[0x5] = {NONE, NONE, SGMII_TSEC1, SGMII_TSEC3},
+	[0x6] = {PCIE3, NONE, NONE, NONE},
+	[0x7] = {PCIE3, NONE, SGMII_TSEC1, SGMII_TSEC3},
+};
+
+int is_serdes_configured(enum srds_prtcl device)
+{
+	int ret = (1 << device) & serdes1_prtcl_map;
+
+	if (ret)
+		return ret;
+
+	return (1 << device) & serdes2_prtcl_map;
+}
+
+void fsl_serdes_init(void)
+{
+	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
+	u32 pordevsr = in_be32(&gur->pordevsr);
+	u32 srds_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
+				MPC85xx_PORDEVSR_IO_SEL_SHIFT;
+	int lane;
+
+	debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
+
+	if (srds_cfg > ARRAY_SIZE(serdes1_cfg_tbl)) {
+		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
+		return;
+	}
+	for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
+		enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
+		serdes1_prtcl_map |= (1 << lane_prtcl);
+	}
+
+	if (srds_cfg > ARRAY_SIZE(serdes2_cfg_tbl)) {
+		printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
+		return;
+	}
+
+	for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
+		enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
+		serdes2_prtcl_map |= (1 << lane_prtcl);
+	}
+
+	if (pordevsr & MPC85xx_PORDEVSR_SGMII1_DIS)
+		serdes2_prtcl_map &= ~(1 << SGMII_TSEC1);
+
+	if (pordevsr & MPC85xx_PORDEVSR_SGMII3_DIS)
+		serdes2_prtcl_map &= ~(1 << SGMII_TSEC3);
+}