arch/powerpc/cpu/mpc85xx/p1010_serdes.c

   1 /*
   2  * Copyright 2011 Freescale Semiconductor, Inc.
   3  * Author: Prabhakar Kushwaha <prabhakar@freescale.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the Free
   7  * Software Foundation; either version 2 of the License, or (at your option)
   8  * any later version.
   9  */
  10
  11 #include <config.h>
  12 #include <common.h>
  13 #include <asm/io.h>
  14 #include <asm/immap_85xx.h>
  15 #include <asm/fsl_serdes.h>
  16
  17 #define SRDS1_MAX_LANES         4
  18 #define SRDS2_MAX_LANES         2
  19
  20 static u32 serdes1_prtcl_map, serdes2_prtcl_map;
  21
  22 static const u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
  23         [0x00] = {NONE, NONE, NONE, NONE},
  24         [0x01] = {PCIE1, PCIE2, SGMII_TSEC2, SGMII_TSEC3},
  25         [0x02] = {PCIE1, SGMII_TSEC1, SGMII_TSEC2, SGMII_TSEC3},
  26         [0x03] = {NONE, SGMII_TSEC1, SGMII_TSEC2, SGMII_TSEC3},
  27 };
  28
  29 static const u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
  30         [0x00] = {NONE, NONE},
  31         [0x01] = {SATA1, SATA2},
  32         [0x02] = {SATA1, SATA2},
  33         [0x03] = {PCIE1, PCIE2},
  34 };
  35
  36
  37 int is_serdes_configured(enum srds_prtcl device)
  38 {
  39         int ret = (1 << device) & serdes1_prtcl_map;
  40
  41         if (ret)
  42                 return ret;
  43
  44         return (1 << device) & serdes2_prtcl_map;
  45 }
  46
  47 void fsl_serdes_init(void)
  48 {
  49         ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
  50         u32 pordevsr = in_be32(&gur->pordevsr);
  51         u32 srds_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
  52                                 MPC85xx_PORDEVSR_IO_SEL_SHIFT;
  53         int lane;
  54
  55         debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
  56
  57         if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
  58                 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
  59                 return;
  60         }
  61         for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
  62                 enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
  63                 serdes1_prtcl_map |= (1 << lane_prtcl);
  64         }
  65
  66         if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
  67                 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
  68                 return;
  69         }
  70
  71         for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
  72                 enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
  73                 serdes2_prtcl_map |= (1 << lane_prtcl);
  74         }
  75 }