arch/arm/cpu/armv8/fsl-lsch3/fsl_lsch3_serdes.c

   1 /*
   2  * Copyright 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 <asm/errno.h>
  10 #include <asm/arch/fsl_serdes.h>
  11 #include <asm/arch-fsl-lsch3/immap_lsch3.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 int is_serdes_configured(enum srds_prtcl device)
  22 {
  23         int ret = 0;
  24
  25 #ifdef CONFIG_SYS_FSL_SRDS_1
  26         ret |= serdes1_prtcl_map[device];
  27 #endif
  28 #ifdef CONFIG_SYS_FSL_SRDS_2
  29         ret |= serdes2_prtcl_map[device];
  30 #endif
  31
  32         return !!ret;
  33 }
  34
  35 int serdes_get_first_lane(u32 sd, enum srds_prtcl device)
  36 {
  37         struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
  38         u32 cfg = in_le32(&gur->rcwsr[28]);
  39         int i;
  40
  41         switch (sd) {
  42 #ifdef CONFIG_SYS_FSL_SRDS_1
  43         case FSL_SRDS_1:
  44                 cfg &= FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK;
  45                 cfg >>= FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT;
  46                 break;
  47 #endif
  48 #ifdef CONFIG_SYS_FSL_SRDS_2
  49         case FSL_SRDS_2:
  50                 cfg &= FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK;
  51                 cfg >>= FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT;
  52                 break;
  53 #endif
  54         default:
  55                 printf("invalid SerDes%d\n", sd);
  56                 break;
  57         }
  58         /* Is serdes enabled at all? */
  59         if (cfg == 0)
  60                 return -ENODEV;
  61
  62         for (i = 0; i < SRDS_MAX_LANES; i++) {
  63                 if (serdes_get_prtcl(sd, cfg, i) == device)
  64                         return i;
  65         }
  66
  67         return -ENODEV;
  68 }
  69
  70 void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
  71                 u8 serdes_prtcl_map[SERDES_PRCTL_COUNT])
  72 {
  73         struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
  74         u32 cfg;
  75         int lane;
  76
  77         memset(serdes_prtcl_map, 0, sizeof(serdes_prtcl_map));
  78
  79         cfg = in_le32(&gur->rcwsr[28]) & sd_prctl_mask;
  80         cfg >>= sd_prctl_shift;
  81         printf("Using SERDES%d Protocol: %d (0x%x)\n", sd + 1, cfg, cfg);
  82
  83         if (!is_serdes_prtcl_valid(sd, cfg))
  84                 printf("SERDES%d[PRTCL] = 0x%x is not valid\n", sd + 1, cfg);
  85
  86         for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
  87                 enum srds_prtcl lane_prtcl = serdes_get_prtcl(sd, cfg, lane);
  88                 if (unlikely(lane_prtcl >= SERDES_PRCTL_COUNT))
  89                         debug("Unknown SerDes lane protocol %d\n", lane_prtcl);
  90                 else {
  91                         serdes_prtcl_map[lane_prtcl] = 1;
  92 #ifdef CONFIG_FSL_MC_ENET
  93                         wriop_init_dpmac(sd, lane + 1, (int)lane_prtcl);
  94 #endif
  95                 }
  96         }
  97 }
  98
  99 void fsl_serdes_init(void)
 100 {
 101 #ifdef CONFIG_SYS_FSL_SRDS_1
 102         serdes_init(FSL_SRDS_1,
 103                     CONFIG_SYS_FSL_LSCH3_SERDES_ADDR,
 104                     FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_MASK,
 105                     FSL_CHASSIS3_RCWSR28_SRDS1_PRTCL_SHIFT,
 106                     serdes1_prtcl_map);
 107 #endif
 108 #ifdef CONFIG_SYS_FSL_SRDS_2
 109         serdes_init(FSL_SRDS_2,
 110                     CONFIG_SYS_FSL_LSCH3_SERDES_ADDR + FSL_SRDS_2 * 0x10000,
 111                     FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_MASK,
 112                     FSL_CHASSIS3_RCWSR28_SRDS2_PRTCL_SHIFT,
 113                     serdes2_prtcl_map);
 114 #endif
 115 }