83xx: serdes setup routines

This patch adds few routines to configure serdes on 837x targets.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>

3 files changed, 167 insertions, 0 deletions

diff --git a/cpu/mpc83xx/Makefile b/cpu/mpc83xx/Makefile
index 7ad7e3e..fcb6a52 100644
--- a/cpu/mpc83xx/Makefile
+++ b/cpu/mpc83xx/Makefile
@@ -37,6 +37,7 @@ COBJS-y += interrupts.o
 COBJS-y += spd_sdram.o
 COBJS-y += ecc.o
 COBJS-$(CONFIG_QE) += qe_io.o
+COBJS-$(CONFIG_FSL_SERDES) += serdes.o
 COBJS-$(CONFIG_83XX_GENERIC_PCI) += pci.o
 COBJS-$(CONFIG_OF_LIBFDT) += fdt.o
 
diff --git a/cpu/mpc83xx/serdes.c b/cpu/mpc83xx/serdes.c
new file mode 100644
index 0000000..020c4c8
--- /dev/null
+++ b/cpu/mpc83xx/serdes.c
@@ -0,0 +1,145 @@
+/*
+ * Freescale SerDes initialization routine
+ *
+ * Copyright (C) 2007 Freescale Semicondutor, Inc. All rights reserved.
+ * Copyright (C) 2008 MontaVista Software, Inc. All rights reserved.
+ *
+ * Author: Li Yang <leoli@freescale.com>
+ *
+ * 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.
+ */
+
+#include <config.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/fsl_serdes.h>
+
+/* SerDes registers */
+#define FSL_SRDSCR0_OFFS		0x0
+#define FSL_SRDSCR0_DPP_1V2		0x00008800
+#define FSL_SRDSCR1_OFFS		0x4
+#define FSL_SRDSCR1_PLLBW		0x00000040
+#define FSL_SRDSCR2_OFFS		0x8
+#define FSL_SRDSCR2_VDD_1V2		0x00800000
+#define FSL_SRDSCR2_SEIC_MASK		0x00001c1c
+#define FSL_SRDSCR2_SEIC_SATA		0x00001414
+#define FSL_SRDSCR2_SEIC_PEX		0x00001010
+#define FSL_SRDSCR2_SEIC_SGMII		0x00000101
+#define FSL_SRDSCR3_OFFS		0xc
+#define FSL_SRDSCR3_KFR_SATA		0x10100000
+#define FSL_SRDSCR3_KPH_SATA		0x04040000
+#define FSL_SRDSCR3_SDFM_SATA_PEX	0x01010000
+#define FSL_SRDSCR3_SDTXL_SATA		0x00000505
+#define FSL_SRDSCR4_OFFS		0x10
+#define FSL_SRDSCR4_PROT_SATA		0x00000808
+#define FSL_SRDSCR4_PROT_PEX		0x00000101
+#define FSL_SRDSCR4_PROT_SGMII		0x00000505
+#define FSL_SRDSCR4_PLANE_X2		0x01000000
+#define FSL_SRDSRSTCTL_OFFS		0x20
+#define FSL_SRDSRSTCTL_RST		0x80000000
+#define FSL_SRDSRSTCTL_SATA_RESET	0xf
+
+void fsl_setup_serdes(u32 offset, char proto, char rfcks, char vdd)
+{
+	void *regs = (void *)CFG_IMMR + offset;
+	u32 tmp;
+
+	/* 1.0V corevdd */
+	if (vdd) {
+		/* DPPE/DPPA = 0 */
+		tmp = in_be32(regs + FSL_SRDSCR0_OFFS);
+		tmp &= ~FSL_SRDSCR0_DPP_1V2;
+		out_be32(regs + FSL_SRDSCR0_OFFS, tmp);
+
+		/* VDD = 0 */
+		tmp = in_be32(regs + FSL_SRDSCR2_OFFS);
+		tmp &= ~FSL_SRDSCR2_VDD_1V2;
+		out_be32(regs + FSL_SRDSCR2_OFFS, tmp);
+	}
+
+	/* protocol specific configuration */
+	switch (proto) {
+	case FSL_SERDES_PROTO_SATA:
+		/* Set and clear reset bits */
+		tmp = in_be32(regs + FSL_SRDSRSTCTL_OFFS);
+		tmp |= FSL_SRDSRSTCTL_SATA_RESET;
+		out_be32(regs + FSL_SRDSRSTCTL_OFFS, tmp);
+		udelay(1000);
+		tmp &= ~FSL_SRDSRSTCTL_SATA_RESET;
+		out_be32(regs + FSL_SRDSRSTCTL_OFFS, tmp);
+
+		/* Configure SRDSCR1 */
+		tmp = in_be32(regs + FSL_SRDSCR1_OFFS);
+		tmp &= ~FSL_SRDSCR1_PLLBW;
+		out_be32(regs + FSL_SRDSCR1_OFFS, tmp);
+
+		/* Configure SRDSCR2 */
+		tmp = in_be32(regs + FSL_SRDSCR2_OFFS);
+		tmp &= ~FSL_SRDSCR2_SEIC_MASK;
+		tmp |= FSL_SRDSCR2_SEIC_SATA;
+		out_be32(regs + FSL_SRDSCR2_OFFS, tmp);
+
+		/* Configure SRDSCR3 */
+		tmp = FSL_SRDSCR3_KFR_SATA | FSL_SRDSCR3_KPH_SATA |
+			FSL_SRDSCR3_SDFM_SATA_PEX |
+			FSL_SRDSCR3_SDTXL_SATA;
+		out_be32(regs + FSL_SRDSCR3_OFFS, tmp);
+
+		/* Configure SRDSCR4 */
+		tmp = rfcks | FSL_SRDSCR4_PROT_SATA;
+		out_be32(regs + FSL_SRDSCR4_OFFS, tmp);
+		break;
+	case FSL_SERDES_PROTO_PEX:
+	case FSL_SERDES_PROTO_PEX_X2:
+		/* Configure SRDSCR1 */
+		tmp = in_be32(regs + FSL_SRDSCR1_OFFS);
+		tmp |= FSL_SRDSCR1_PLLBW;
+		out_be32(regs + FSL_SRDSCR1_OFFS, tmp);
+
+		/* Configure SRDSCR2 */
+		tmp = in_be32(regs + FSL_SRDSCR2_OFFS);
+		tmp &= ~FSL_SRDSCR2_SEIC_MASK;
+		tmp |= FSL_SRDSCR2_SEIC_PEX;
+		out_be32(regs + FSL_SRDSCR2_OFFS, tmp);
+
+		/* Configure SRDSCR3 */
+		tmp = FSL_SRDSCR3_SDFM_SATA_PEX;
+		out_be32(regs + FSL_SRDSCR3_OFFS, tmp);
+
+		/* Configure SRDSCR4 */
+		tmp = rfcks | FSL_SRDSCR4_PROT_PEX;
+		if (proto == FSL_SERDES_PROTO_PEX_X2)
+			tmp |= FSL_SRDSCR4_PLANE_X2;
+		out_be32(regs + FSL_SRDSCR4_OFFS, tmp);
+		break;
+	case FSL_SERDES_PROTO_SGMII:
+		/* Configure SRDSCR1 */
+		tmp = in_be32(regs + FSL_SRDSCR1_OFFS);
+		tmp &= ~FSL_SRDSCR1_PLLBW;
+		out_be32(regs + FSL_SRDSCR1_OFFS, tmp);
+
+		/* Configure SRDSCR2 */
+		tmp = in_be32(regs + FSL_SRDSCR2_OFFS);
+		tmp &= ~FSL_SRDSCR2_SEIC_MASK;
+		tmp |= FSL_SRDSCR2_SEIC_SGMII;
+		out_be32(regs + FSL_SRDSCR2_OFFS, tmp);
+
+		/* Configure SRDSCR3 */
+		out_be32(regs + FSL_SRDSCR3_OFFS, 0);
+
+		/* Configure SRDSCR4 */
+		tmp = rfcks | FSL_SRDSCR4_PROT_SGMII;
+		out_be32(regs + FSL_SRDSCR4_OFFS, tmp);
+		break;
+	default:
+		return;
+	}
+
+	/* Do a software reset */
+	tmp = in_be32(regs + FSL_SRDSRSTCTL_OFFS);
+	tmp |= FSL_SRDSRSTCTL_RST;
+	out_be32(regs + FSL_SRDSRSTCTL_OFFS, tmp);
+}
diff --git a/include/asm-ppc/fsl_serdes.h b/include/asm-ppc/fsl_serdes.h
new file mode 100644
index 0000000..733f919
--- /dev/null
+++ b/include/asm-ppc/fsl_serdes.h
@@ -0,0 +1,21 @@
+#ifndef __FSL_SERDES_H
+#define __FSL_SERDES_H
+
+#include <config.h>
+
+#define FSL_SERDES_CLK_100		0
+#define FSL_SERDES_CLK_125		1
+#define FSL_SERDES_CLK_150		3
+#define FSL_SERDES_PROTO_SATA		0
+#define FSL_SERDES_PROTO_PEX		1
+#define FSL_SERDES_PROTO_PEX_X2		2
+#define FSL_SERDES_PROTO_SGMII		3
+#define FSL_SERDES_VDD_1V		1
+
+#ifdef CONFIG_FSL_SERDES
+extern void fsl_setup_serdes(u32 offset, char proto, char rfcks, char vdd);
+#else
+static void fsl_setup_serdes(u32 offset, char proto, char rfcks, char vdd) {}
+#endif /* CONFIG_FSL_SERDES */
+
+#endif /* __FSL_SERDES_H */