powerpc/85xx: Add is_serdes_configured() support for P2020 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: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 73 insertions, 0 deletions

diff --git a/arch/powerpc/cpu/mpc85xx/p2020_serdes.c b/arch/powerpc/cpu/mpc85xx/p2020_serdes.c
new file mode 100644
index 0000000000..389ff6bd28
--- /dev/null
+++ b/arch/powerpc/cpu/mpc85xx/p2020_serdes.c
@@ -0,0 +1,73 @@
+/*
+ * 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		4
+
+static u32 serdes1_prtcl_map;
+
+static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
+	[0x0] = {PCIE1, NONE, NONE, NONE},
+	[0x2] = {PCIE1, PCIE2, PCIE3, PCIE3},
+	[0x4] = {PCIE1, PCIE1, PCIE3, PCIE3},
+	[0x6] = {PCIE1, PCIE1, PCIE1, PCIE1},
+	[0x7] = {SRIO2, SRIO1, NONE, NONE},
+	[0x8] = {SRIO2, SRIO2, SRIO2, SRIO2},
+	[0x9] = {SRIO2, SRIO2, SRIO2, SRIO2},
+	[0xa] = {SRIO2, SRIO2, SRIO2, SRIO2},
+	[0xb] = {SRIO2, SRIO1, SGMII_TSEC2, SGMII_TSEC3},
+	[0xc] = {SRIO2, SRIO1, SGMII_TSEC2, SGMII_TSEC3},
+	[0xd] = {PCIE1, SRIO1, SGMII_TSEC2, SGMII_TSEC3},
+	[0xe] = {PCIE1, PCIE2, SGMII_TSEC2, SGMII_TSEC3},
+	[0xf] = {PCIE1, PCIE1, SGMII_TSEC2, SGMII_TSEC3},
+};
+
+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);
+	}
+}