arch/powerpc/cpu/mpc85xx/mpc8548_serdes.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2010 Freescale Semiconductor, Inc.
   4  */
   5
   6 #include <config.h>
   7 #include <common.h>
   8 #include <asm/io.h>
   9 #include <asm/immap_85xx.h>
  10 #include <asm/fsl_serdes.h>
  11
  12 #define SRDS1_MAX_LANES         8
  13
  14 static u32 serdes1_prtcl_map;
  15
  16 static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
  17         [0x3] = {PCIE1, PCIE1, PCIE1, PCIE1, SRIO1, SRIO1, SRIO1, SRIO1},
  18         [0x4] = {PCIE1, PCIE1, PCIE1, PCIE1, SRIO1, SRIO1, SRIO1, SRIO1},
  19         [0x5] = {NONE, NONE, NONE, NONE, SRIO1, SRIO1, SRIO1, SRIO1},
  20         [0x6] = {NONE, NONE, NONE, NONE, SRIO1, SRIO1, SRIO1, SRIO1},
  21         [0x7] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1},
  22 };
  23
  24 int is_serdes_configured(enum srds_prtcl prtcl)
  25 {
  26         if (!(serdes1_prtcl_map & (1 << NONE)))
  27                 fsl_serdes_init();
  28
  29         return (1 << prtcl) & serdes1_prtcl_map;
  30 }
  31
  32 void fsl_serdes_init(void)
  33 {
  34         ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
  35         u32 pordevsr = in_be32(&gur->pordevsr);
  36         u32 srds1_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
  37                                 MPC85xx_PORDEVSR_IO_SEL_SHIFT;
  38         int lane;
  39
  40         if (serdes1_prtcl_map & (1 << NONE))
  41                 return;
  42
  43         debug("PORDEVSR[IO_SEL] = %x\n", srds1_cfg);
  44
  45         if (srds1_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
  46                 printf("Invalid PORDEVSR[IO_SEL] = %d\n", srds1_cfg);
  47                 return ;
  48         }
  49
  50         for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
  51                 enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds1_cfg][lane];
  52                 serdes1_prtcl_map |= (1 << lane_prtcl);
  53         }
  54
  55         /* Set the first bit to indicate serdes has been initialized */
  56         serdes1_prtcl_map |= (1 << NONE);
  57 }