arch/powerpc/cpu/mpc85xx/p1010_serdes.c

   1 /*
   2  * Copyright 2011 Freescale Semiconductor, Inc.
   3  * Author: Prabhakar Kushwaha <prabhakar@freescale.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <config.h>
   9 #include <common.h>
  10 #include <asm/io.h>
  11 #include <asm/immap_85xx.h>
  12 #include <asm/fsl_serdes.h>
  13
  14 #define SRDS1_MAX_LANES         4
  15 #define SRDS2_MAX_LANES         2
  16
  17 static u32 serdes1_prtcl_map, serdes2_prtcl_map;
  18
  19 static const u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
  20         [0x00] = {NONE, NONE, NONE, NONE},
  21         [0x01] = {PCIE1, PCIE2, SGMII_TSEC2, SGMII_TSEC3},
  22         [0x02] = {PCIE1, SGMII_TSEC1, SGMII_TSEC2, SGMII_TSEC3},
  23         [0x03] = {NONE, SGMII_TSEC1, SGMII_TSEC2, SGMII_TSEC3},
  24 };
  25
  26 static const u8 serdes2_cfg_tbl[][SRDS2_MAX_LANES] = {
  27         [0x00] = {NONE, NONE},
  28         [0x01] = {SATA1, SATA2},
  29         [0x02] = {SATA1, SATA2},
  30         [0x03] = {PCIE1, PCIE2},
  31 };
  32
  33
  34 int is_serdes_configured(enum srds_prtcl device)
  35 {
  36         int ret = (1 << device) & serdes1_prtcl_map;
  37
  38         if (ret)
  39                 return ret;
  40
  41         return (1 << device) & serdes2_prtcl_map;
  42 }
  43
  44 void fsl_serdes_init(void)
  45 {
  46         ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
  47         u32 pordevsr = in_be32(&gur->pordevsr);
  48         u32 srds_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
  49                                 MPC85xx_PORDEVSR_IO_SEL_SHIFT;
  50         int lane;
  51
  52         debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
  53
  54         if (srds_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
  55                 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
  56                 return;
  57         }
  58         for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
  59                 enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds_cfg][lane];
  60                 serdes1_prtcl_map |= (1 << lane_prtcl);
  61         }
  62
  63         if (srds_cfg >= ARRAY_SIZE(serdes2_cfg_tbl)) {
  64                 printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
  65                 return;
  66         }
  67
  68         for (lane = 0; lane < SRDS2_MAX_LANES; lane++) {
  69                 enum srds_prtcl lane_prtcl = serdes2_cfg_tbl[srds_cfg][lane];
  70                 serdes2_prtcl_map |= (1 << lane_prtcl);
  71         }
  72 }