arch/powerpc/cpu/mpc85xx/mpc8548_serdes.c

   1 /*
   2  * Copyright 2010 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <config.h>
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <asm/immap_85xx.h>
  11 #include <asm/fsl_serdes.h>
  12
  13 #define SRDS1_MAX_LANES         8
  14
  15 static u32 serdes1_prtcl_map;
  16
  17 static u8 serdes1_cfg_tbl[][SRDS1_MAX_LANES] = {
  18         [0x3] = {PCIE1, PCIE1, PCIE1, PCIE1, SRIO1, SRIO1, SRIO1, SRIO1},
  19         [0x4] = {PCIE1, PCIE1, PCIE1, PCIE1, SRIO1, SRIO1, SRIO1, SRIO1},
  20         [0x5] = {NONE, NONE, NONE, NONE, SRIO1, SRIO1, SRIO1, SRIO1},
  21         [0x6] = {NONE, NONE, NONE, NONE, SRIO1, SRIO1, SRIO1, SRIO1},
  22         [0x7] = {PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1, PCIE1},
  23 };
  24
  25 int is_serdes_configured(enum srds_prtcl prtcl)
  26 {
  27         if (!(serdes1_prtcl_map & (1 << NONE)))
  28                 fsl_serdes_init();
  29
  30         return (1 << prtcl) & serdes1_prtcl_map;
  31 }
  32
  33 void fsl_serdes_init(void)
  34 {
  35         ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
  36         u32 pordevsr = in_be32(&gur->pordevsr);
  37         u32 srds1_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
  38                                 MPC85xx_PORDEVSR_IO_SEL_SHIFT;
  39         int lane;
  40
  41         if (serdes1_prtcl_map & (1 << NONE))
  42                 return;
  43
  44         debug("PORDEVSR[IO_SEL] = %x\n", srds1_cfg);
  45
  46         if (srds1_cfg >= ARRAY_SIZE(serdes1_cfg_tbl)) {
  47                 printf("Invalid PORDEVSR[IO_SEL] = %d\n", srds1_cfg);
  48                 return ;
  49         }
  50
  51         for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
  52                 enum srds_prtcl lane_prtcl = serdes1_cfg_tbl[srds1_cfg][lane];
  53                 serdes1_prtcl_map |= (1 << lane_prtcl);
  54         }
  55
  56         /* Set the first bit to indicate serdes has been initialized */
  57         serdes1_prtcl_map |= (1 << NONE);
  58 }