powerpc/85xx: Add is_serdes_configured() support for MPC8568 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>

diff --git a/arch/powerpc/cpu/mpc85xx/Makefile b/arch/powerpc/cpu/mpc85xx/Makefile
index e1320bf1543736d0e0f27672ae31232fdbdfac8c..3c754296974e7a9cd997a64821614e3e4fad93eb 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/Makefile
+++ b/arch/powerpc/cpu/mpc85xx/Makefile
@@ -79,6 +79,7 @@ COBJS-$(CONFIG_FSL_CORENET) += fsl_corenet_serdes.o
 # SoC specific SERDES support
 COBJS-$(CONFIG_MPC8536) += mpc8536_serdes.o
 COBJS-$(CONFIG_MPC8548) += mpc8548_serdes.o
+COBJS-$(CONFIG_MPC8568) += mpc8568_serdes.o
 COBJS-$(CONFIG_MPC8572) += mpc8572_serdes.o
 COBJS-$(CONFIG_P1013)  += p1013_serdes.o
 COBJS-$(CONFIG_P1022)  += p1022_serdes.o

diff --git a/arch/powerpc/cpu/mpc85xx/mpc8568_serdes.c b/arch/powerpc/cpu/mpc85xx/mpc8568_serdes.c
new file mode 100644 (file)
index 0000000..2582637
--- /dev/null
+++ b/arch/powerpc/cpu/mpc85xx/mpc8568_serdes.c
@@ -0,0 +1,65 @@
+/*
+ * 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
+
+static u32 serdes1_prtcl_map;
+
+static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
+       [0x3] = {PCIE1, PCIE1, PCIE1, PCIE1, SRIO1, SRIO1, SRIO1, SRIO1},
+       [0x4] = {PCIE1, PCIE1, PCIE1, PCIE1, SRIO1, SRIO1, SRIO1, SRIO1},
+       [0x5] = {NONE, NONE, NONE, NONE, SRIO1, SRIO1, SRIO1, SRIO1},
+       [0x6] = {NONE, NONE, NONE, NONE, SRIO1, SRIO1, SRIO1, SRIO1},
+       [0x7] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1},
+};
+
+int is_serdes_configured(enum srds_prtcl prtcl)
+{
+       return (1 << prtcl) & serdes1_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);
+       }
+}