LXR uboot/arch/powerpc/cpu/mpc85xx/c29x

   1/*
   2 * Copyright 2013 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         4
  14
  15static u32 serdes1_prtcl_map;
  16
  17struct serdes_config {
  18        u32 protocol;
  19        u8 lanes[SRDS1_MAX_LANES];
  20};
  21
  22static const struct serdes_config serdes1_cfg_tbl[] = {
  23        /* SerDes 1 */
  24        {1, {PCIE1, PCIE1, PCIE1, PCIE1} },
  25        {2, {PCIE1, PCIE1, PCIE1, PCIE1} },
  26        {3, {PCIE1, PCIE1, NONE, NONE} },
  27        {4, {PCIE1, PCIE1, NONE, NONE} },
  28        {5, {PCIE1, NONE, NONE, NONE} },
  29        {6, {PCIE1, NONE, NONE, NONE} },
  30        {}
  31};
  32
  33int is_serdes_configured(enum srds_prtcl device)
  34{
  35        if (!(serdes1_prtcl_map & (1 << NONE)))
  36                fsl_serdes_init();
  37
  38        return (1 << device) & serdes1_prtcl_map;
  39}
  40
  41void fsl_serdes_init(void)
  42{
  43        ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
  44        u32 pordevsr = in_be32(&gur->pordevsr);
  45        u32 srds_cfg = (pordevsr & MPC85xx_PORDEVSR_IO_SEL) >>
  46                                MPC85xx_PORDEVSR_IO_SEL_SHIFT;
  47        const struct serdes_config *ptr;
  48        int lane;
  49
  50        if (serdes1_prtcl_map & (1 << NONE))
  51                return;
  52
  53        debug("PORDEVSR[IO_SEL_SRDS] = %x\n", srds_cfg);
  54
  55        if (srds_cfg > ARRAY_SIZE(serdes1_cfg_tbl)) {
  56                printf("Invalid PORDEVSR[IO_SEL_SRDS] = %d\n", srds_cfg);
  57                return;
  58        }
  59
  60        ptr = &serdes1_cfg_tbl[srds_cfg];
  61        if (!ptr->protocol)
  62                return;
  63
  64        for (lane = 0; lane < SRDS1_MAX_LANES; lane++) {
  65                enum srds_prtcl lane_prtcl = ptr->lanes[lane];
  66                serdes1_prtcl_map |= (1 << lane_prtcl);
  67        }
  68
  69        /* Set the first bit to indicate serdes has been initialized */
  70        serdes1_prtcl_map |= (1 << NONE);
  71}
  72