arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch3_serdes.c

   1 /*
   2  * Copyright 2014-2015 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/io.h>
   9 #include <linux/errno.h>
  10 #include <asm/arch/fsl_serdes.h>
  11 #include <asm/arch/soc.h>
  12 #include <fsl-mc/ldpaa_wriop.h>
  13
  14 #ifdef CONFIG_SYS_FSL_SRDS_1
  15 static u8 serdes1_prtcl_map[SERDES_PRCTL_COUNT];
  16 #endif
  17 #ifdef CONFIG_SYS_FSL_SRDS_2
  18 static u8 serdes2_prtcl_map[SERDES_PRCTL_COUNT];
  19 #endif
  20
  21 #if defined(CONFIG_FSL_MC_ENET) && !defined(CONFIG_SPL_BUILD)
  22 int xfi_dpmac[XFI8 + 1];
  23 int sgmii_dpmac[SGMII16 + 1];
  24 #endif
  25
  26 __weak void wriop_init_dpmac_qsgmii(int sd, int lane_prtcl)
  27 {
  28         return;
  29 }
  30
  31 int is_serdes_configured(enum srds_prtcl device)
  32 {
  33         int ret = 0;
  34
  35 #ifdef CONFIG_SYS_FSL_SRDS_1
  36         if (!serdes1_prtcl_map[NONE])
  37                 fsl_serdes_init();
  38
  39         ret |= serdes1_prtcl_map[device];
  40 #endif
  41 #ifdef CONFIG_SYS_FSL_SRDS_2
  42         if (!serdes2_prtcl_map[NONE])
  43                 fsl_serdes_init();
  44
  45         ret |= serdes2_prtcl_map[device];
  46 #endif
  47
  48         return !!ret;
  49 }
  50
  51 int serdes_get_first_lane(u32 sd, enum srds_prtcl device)
  52 {
  53         struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
  54         u32 cfg = 0;
  55         int i;
  56
  57         switch (sd) {
  58 #ifdef CONFIG_SYS_FSL_SRDS_1
  59         case FSL_SRDS_1:
  60                 cfg = gur_in32(&gur->rcwsr[FSL_CHASSIS3_SRDS1_REGSR - 1]);
  61                 cfg &= FSL_CHASSIS3_SRDS1_PRTCL_MASK;
  62                 cfg >>= FSL_CHASSIS3_SRDS1_PRTCL_SHIFT;
  63                 break;
  64 #endif
  65 #ifdef CONFIG_SYS_FSL_SRDS_2
  66         case FSL_SRDS_2:
  67                 cfg = gur_in32(&gur->rcwsr[FSL_CHASSIS3_SRDS2_REGSR - 1]);
  68                 cfg &= FSL_CHASSIS3_SRDS2_PRTCL_MASK;
  69                 cfg >>= FSL_CHASSIS3_SRDS2_PRTCL_SHIFT;
  70                 break;
  71 #endif
  72         default:
  73                 printf("invalid SerDes%d\n", sd);
  74                 break;
  75         }
  76         /* Is serdes enabled at all? */
  77         if (cfg == 0)
  78                 return -ENODEV;
  79
  80         for (i = 0; i < SRDS_MAX_LANES; i++) {
  81                 if (serdes_get_prtcl(sd, cfg, i) == device)
  82                         return i;
  83         }
  84
  85         return -ENODEV;
  86 }
  87
  88 void serdes_init(u32 sd, u32 sd_addr, u32 rcwsr, u32 sd_prctl_mask,
  89                  u32 sd_prctl_shift, u8 serdes_prtcl_map[SERDES_PRCTL_COUNT])
  90 {
  91         struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
  92         u32 cfg;
  93         int lane;
  94
  95         if (serdes_prtcl_map[NONE])
  96                 return;
  97
  98         memset(serdes_prtcl_map, 0, sizeof(u8) * SERDES_PRCTL_COUNT);
  99
 100         cfg = gur_in32(&gur->rcwsr[rcwsr - 1]) & sd_prctl_mask;
 101         cfg >>= sd_prctl_shift;
 102         printf("Using SERDES%d Protocol: %d (0x%x)\n", sd + 1, cfg, cfg);
 103
 104         if (!is_serdes_prtcl_valid(sd, cfg))
 105                 printf("SERDES%d[PRTCL] = 0x%x is not valid\n", sd + 1, cfg);
 106
 107         for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
 108                 enum srds_prtcl lane_prtcl = serdes_get_prtcl(sd, cfg, lane);
 109                 if (unlikely(lane_prtcl >= SERDES_PRCTL_COUNT))
 110                         debug("Unknown SerDes lane protocol %d\n", lane_prtcl);
 111                 else {
 112                         serdes_prtcl_map[lane_prtcl] = 1;
 113 #if defined(CONFIG_FSL_MC_ENET) && !defined(CONFIG_SPL_BUILD)
 114                         switch (lane_prtcl) {
 115                         case QSGMII_A:
 116                         case QSGMII_B:
 117                         case QSGMII_C:
 118                         case QSGMII_D:
 119                                 wriop_init_dpmac_qsgmii(sd, (int)lane_prtcl);
 120                                 break;
 121                         default:
 122                                 if (lane_prtcl >= XFI1 && lane_prtcl <= XFI8)
 123                                         wriop_init_dpmac(sd,
 124                                                          xfi_dpmac[lane_prtcl],
 125                                                          (int)lane_prtcl);
 126
 127                                  if (lane_prtcl >= SGMII1 &&
 128                                      lane_prtcl <= SGMII16)
 129                                         wriop_init_dpmac(sd, sgmii_dpmac[
 130                                                          lane_prtcl],
 131                                                          (int)lane_prtcl);
 132                                 break;
 133                         }
 134 #endif
 135                 }
 136         }
 137
 138         /* Set the first element to indicate serdes has been initialized */
 139         serdes_prtcl_map[NONE] = 1;
 140 }
 141
 142 void fsl_serdes_init(void)
 143 {
 144 #if defined(CONFIG_FSL_MC_ENET) && !defined(CONFIG_SPL_BUILD)
 145         int i , j;
 146
 147         for (i = XFI1, j = 1; i <= XFI8; i++, j++)
 148                 xfi_dpmac[i] = j;
 149
 150         for (i = SGMII1, j = 1; i <= SGMII16; i++, j++)
 151                 sgmii_dpmac[i] = j;
 152 #endif
 153
 154 #ifdef CONFIG_SYS_FSL_SRDS_1
 155         serdes_init(FSL_SRDS_1,
 156                     CONFIG_SYS_FSL_LSCH3_SERDES_ADDR,
 157                     FSL_CHASSIS3_SRDS1_REGSR,
 158                     FSL_CHASSIS3_SRDS1_PRTCL_MASK,
 159                     FSL_CHASSIS3_SRDS1_PRTCL_SHIFT,
 160                     serdes1_prtcl_map);
 161 #endif
 162 #ifdef CONFIG_SYS_FSL_SRDS_2
 163         serdes_init(FSL_SRDS_2,
 164                     CONFIG_SYS_FSL_LSCH3_SERDES_ADDR + FSL_SRDS_2 * 0x10000,
 165                     FSL_CHASSIS3_SRDS2_REGSR,
 166                     FSL_CHASSIS3_SRDS2_PRTCL_MASK,
 167                     FSL_CHASSIS3_SRDS2_PRTCL_SHIFT,
 168                     serdes2_prtcl_map);
 169 #endif
 170 }