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85xx: Add is_serdes_configured() support to MPC8536 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>
This commit is contained in:
Kumar Gala 2010-04-20 10:20:33 -05:00
parent 1535185577
commit 6ab4011b79
2 changed files with 114 additions and 18 deletions
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79
arch/powerpc/cpu/mpc85xx/mpc8536_serdes.c
View File

@ -1,17 +1,31 @@
/*
* Copyright (C) 2008 Freescale Semicondutor, Inc.
* Copyright 2008,2010 Freescale Semiconductor, Inc.
* Dave Liu <daveliu@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.
* 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>
/* PORDEVSR register */
#define GUTS_PORDEVSR_OFFS 0xc
@ -52,6 +66,61 @@
#define FSL_SRDSCR3_LANEE_SGMII 0x00000000
#define FSL_SRDSCR3_LANEE_SATA 0x00150005
#define SRDS1_MAX_LANES 8
#define SRDS2_MAX_LANES 2
static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
[0x2] = {PCIE1, PCIE1, PCIE1, PCIE1, NONE, NONE, NONE, NONE},
[0x3] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1},
[0x5] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE2, PCIE2, PCIE2, PCIE2},
[0x7] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE2, PCIE2, PCIE3, PCIE3},
};
static u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
[0x1] = {SATA1, SATA2},
[0x3] = {SATA1, NONE},
[0x4] = {SGMII_TSEC1, SGMII_TSEC3},
[0x6] = {SGMII_TSEC1, NONE},
};
int is_serdes_configured(enum srds_prtcl device)
{
int i;
ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
u32 pordevsr = in_be32(&gur->pordevsr);
u32 srds1_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
MPC85xx_PORDEVSR_IO_SEL_SHIFT;
u32 srds2_cfg = (pordevsr & MPC85xx_PORDEVSR_SRDS2_IO_SEL) >>
GUTS_PORDEVSR_SERDES2_IO_SEL_SHIFT;
debug("%s: dev = %d\n", __FUNCTION__, device);
debug("PORDEVSR[IO_SEL] = %x\n", srds1_cfg);
debug("PORDEVSR[SRDS2_IO_SEL] = %x\n", srds2_cfg);
if (srds1_cfg > ARRAY_SIZE(serdes1_cfg_tbl)) {
printf("Invalid PORDEVSR[IO_SEL] = %d\n", srds1_cfg);
return 0;
}
if (srds2_cfg > ARRAY_SIZE(serdes2_cfg_tbl)) {
printf("Invalid PORDEVSR[SRDS2_IO_SEL] = %d\n", srds2_cfg);
return 0;
}
for (i = 0; i < SRDS1_MAX_LANES; i++) {
if (serdes1_cfg_tbl[srds1_cfg][i] == device)
return 1;
}
for (i = 0; i < SRDS2_MAX_LANES; i++) {
if (serdes2_cfg_tbl[srds2_cfg][i] == device)
return 1;
}
return 0;
}
void fsl_serdes_init(void)
{
void *guts = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);

53
arch/powerpc/include/asm/fsl_serdes.h
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@ -1,21 +1,48 @@
/*
* Copyright 2010 Freescale Semiconductor, Inc.
*
* 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
*/
#ifndef __FSL_SERDES_H
#define __FSL_SERDES_H
#include <config.h>
#define FSL_SERDES_CLK_100 (0 << 28)
#define FSL_SERDES_CLK_125 (1 << 28)
#define FSL_SERDES_CLK_150 (3 << 28)
#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
enum srds_prtcl {
NONE = 0,
PCIE1,
PCIE2,
PCIE3,
PCIE4,
SATA1,
SATA2,
SRIO1,
SRIO2,
SGMII_FM1,
SGMII_FM2,
SGMII_TSEC1,
SGMII_TSEC2,
SGMII_TSEC3,
SGMII_TSEC4,
XAUI_FM1,
XAUI_FM2,
AURORA,
};
#ifdef CONFIG_FSL_SERDES
extern void fsl_setup_serdes(u32 offset, char proto, u32 rfcks, char vdd);
#else
static void fsl_setup_serdes(u32 offset, char proto, u32 rfcks, char vdd) {}
#endif /* CONFIG_FSL_SERDES */
int is_serdes_configured(enum srds_prtcl device);
#endif /* __FSL_SERDES_H */