arch/powerpc/cpu/mpc85xx/fsl_corenet2_serdes.c

   1 /*
   2  * Copyright 2012 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/fsl_serdes.h>
   9 #include <asm/immap_85xx.h>
  10 #include <asm/io.h>
  11 #include <asm/processor.h>
  12 #include <asm/fsl_law.h>
  13 #include <asm/errno.h>
  14 #include <fsl_errata.h>
  15 #include "fsl_corenet2_serdes.h"
  16
  17 #ifdef CONFIG_SYS_FSL_SRDS_1
  18 static u8 serdes1_prtcl_map[SERDES_PRCTL_COUNT];
  19 #endif
  20 #ifdef CONFIG_SYS_FSL_SRDS_2
  21 static u8 serdes2_prtcl_map[SERDES_PRCTL_COUNT];
  22 #endif
  23 #ifdef CONFIG_SYS_FSL_SRDS_3
  24 static u8 serdes3_prtcl_map[SERDES_PRCTL_COUNT];
  25 #endif
  26 #ifdef CONFIG_SYS_FSL_SRDS_4
  27 static u8 serdes4_prtcl_map[SERDES_PRCTL_COUNT];
  28 #endif
  29
  30 #ifdef DEBUG
  31 static const char *serdes_prtcl_str[] = {
  32         [NONE] = "NA",
  33         [PCIE1] = "PCIE1",
  34         [PCIE2] = "PCIE2",
  35         [PCIE3] = "PCIE3",
  36         [PCIE4] = "PCIE4",
  37         [SATA1] = "SATA1",
  38         [SATA2] = "SATA2",
  39         [SRIO1] = "SRIO1",
  40         [SRIO2] = "SRIO2",
  41         [SGMII_FM1_DTSEC1] = "SGMII_FM1_DTSEC1",
  42         [SGMII_FM1_DTSEC2] = "SGMII_FM1_DTSEC2",
  43         [SGMII_FM1_DTSEC3] = "SGMII_FM1_DTSEC3",
  44         [SGMII_FM1_DTSEC4] = "SGMII_FM1_DTSEC4",
  45         [SGMII_FM1_DTSEC5] = "SGMII_FM1_DTSEC5",
  46         [SGMII_FM1_DTSEC6] = "SGMII_FM1_DTSEC6",
  47         [SGMII_FM2_DTSEC1] = "SGMII_FM2_DTSEC1",
  48         [SGMII_FM2_DTSEC2] = "SGMII_FM2_DTSEC2",
  49         [SGMII_FM2_DTSEC3] = "SGMII_FM2_DTSEC3",
  50         [SGMII_FM2_DTSEC4] = "SGMII_FM2_DTSEC4",
  51         [XAUI_FM1] = "XAUI_FM1",
  52         [XAUI_FM2] = "XAUI_FM2",
  53         [AURORA] = "DEBUG",
  54         [CPRI1] = "CPRI1",
  55         [CPRI2] = "CPRI2",
  56         [CPRI3] = "CPRI3",
  57         [CPRI4] = "CPRI4",
  58         [CPRI5] = "CPRI5",
  59         [CPRI6] = "CPRI6",
  60         [CPRI7] = "CPRI7",
  61         [CPRI8] = "CPRI8",
  62         [XAUI_FM1_MAC9] = "XAUI_FM1_MAC9",
  63         [XAUI_FM1_MAC10] = "XAUI_FM1_MAC10",
  64         [XAUI_FM2_MAC9] = "XAUI_FM2_MAC9",
  65         [XAUI_FM2_MAC10] = "XAUI_FM2_MAC10",
  66         [HIGIG_FM1_MAC9] = "HiGig_FM1_MAC9",
  67         [HIGIG_FM1_MAC10] = "HiGig_FM1_MAC10",
  68         [HIGIG_FM2_MAC9] = "HiGig_FM2_MAC9",
  69         [HIGIG_FM2_MAC10] = "HiGig_FM2_MAC10",
  70         [QSGMII_FM1_A] = "QSGMII_FM1_A",
  71         [QSGMII_FM1_B] = "QSGMII_FM1_B",
  72         [QSGMII_FM2_A] = "QSGMII_FM2_A",
  73         [QSGMII_FM2_B] = "QSGMII_FM2_B",
  74         [XFI_FM1_MAC9] = "XFI_FM1_MAC9",
  75         [XFI_FM1_MAC10] = "XFI_FM1_MAC10",
  76         [XFI_FM2_MAC9] = "XFI_FM2_MAC9",
  77         [XFI_FM2_MAC10] = "XFI_FM2_MAC10",
  78         [INTERLAKEN] = "INTERLAKEN",
  79         [QSGMII_SW1_A] = "QSGMII_SW1_A",
  80         [QSGMII_SW1_B] = "QSGMII_SW1_B",
  81         [SGMII_SW1_MAC1] = "SGMII_SW1_MAC1",
  82         [SGMII_SW1_MAC2] = "SGMII_SW1_MAC2",
  83         [SGMII_SW1_MAC3] = "SGMII_SW1_MAC3",
  84         [SGMII_SW1_MAC4] = "SGMII_SW1_MAC4",
  85         [SGMII_SW1_MAC5] = "SGMII_SW1_MAC5",
  86         [SGMII_SW1_MAC6] = "SGMII_SW1_MAC6",
  87 };
  88 #endif
  89
  90 int is_serdes_configured(enum srds_prtcl device)
  91 {
  92         int ret = 0;
  93
  94 #ifdef CONFIG_SYS_FSL_SRDS_1
  95         ret |= serdes1_prtcl_map[device];
  96 #endif
  97 #ifdef CONFIG_SYS_FSL_SRDS_2
  98         ret |= serdes2_prtcl_map[device];
  99 #endif
 100 #ifdef CONFIG_SYS_FSL_SRDS_3
 101         ret |= serdes3_prtcl_map[device];
 102 #endif
 103 #ifdef CONFIG_SYS_FSL_SRDS_4
 104         ret |= serdes4_prtcl_map[device];
 105 #endif
 106
 107         return !!ret;
 108 }
 109
 110 int serdes_get_first_lane(u32 sd, enum srds_prtcl device)
 111 {
 112         const ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 113         u32 cfg = in_be32(&gur->rcwsr[4]);
 114         int i;
 115
 116         switch (sd) {
 117 #ifdef CONFIG_SYS_FSL_SRDS_1
 118         case FSL_SRDS_1:
 119                 cfg &= FSL_CORENET2_RCWSR4_SRDS1_PRTCL;
 120                 cfg >>= FSL_CORENET2_RCWSR4_SRDS1_PRTCL_SHIFT;
 121                 break;
 122 #endif
 123 #ifdef CONFIG_SYS_FSL_SRDS_2
 124         case FSL_SRDS_2:
 125                 cfg &= FSL_CORENET2_RCWSR4_SRDS2_PRTCL;
 126                 cfg >>= FSL_CORENET2_RCWSR4_SRDS2_PRTCL_SHIFT;
 127                 break;
 128 #endif
 129 #ifdef CONFIG_SYS_FSL_SRDS_3
 130         case FSL_SRDS_3:
 131                 cfg &= FSL_CORENET2_RCWSR4_SRDS3_PRTCL;
 132                 cfg >>= FSL_CORENET2_RCWSR4_SRDS3_PRTCL_SHIFT;
 133                 break;
 134 #endif
 135 #ifdef CONFIG_SYS_FSL_SRDS_4
 136         case FSL_SRDS_4:
 137                 cfg &= FSL_CORENET2_RCWSR4_SRDS4_PRTCL;
 138                 cfg >>= FSL_CORENET2_RCWSR4_SRDS4_PRTCL_SHIFT;
 139                 break;
 140 #endif
 141         default:
 142                 printf("invalid SerDes%d\n", sd);
 143                 break;
 144         }
 145         /* Is serdes enabled at all? */
 146         if (unlikely(cfg == 0))
 147                 return -ENODEV;
 148
 149         for (i = 0; i < SRDS_MAX_LANES; i++) {
 150                 if (serdes_get_prtcl(sd, cfg, i) == device)
 151                         return i;
 152         }
 153
 154         return -ENODEV;
 155 }
 156
 157 #define BC3_SHIFT       9
 158 #define DC3_SHIFT       6
 159 #define FC3_SHIFT       0
 160 #define BC2_SHIFT       19
 161 #define DC2_SHIFT       16
 162 #define FC2_SHIFT       10
 163 #define BC1_SHIFT       29
 164 #define DC1_SHIFT       26
 165 #define FC1_SHIFT       20
 166 #define BC_MASK         0x1
 167 #define DC_MASK         0x7
 168 #define FC_MASK         0x3F
 169
 170 #define FUSE_VAL_MASK           0x00000003
 171 #define FUSE_VAL_SHIFT          30
 172 #define CR0_DCBIAS_SHIFT        5
 173 #define CR1_FCAP_SHIFT          15
 174 #define CR1_BCAP_SHIFT          29
 175 #define FCAP_MASK               0x001F8000
 176 #define BCAP_MASK               0x20000000
 177 #define BCAP_OVD_MASK           0x10000000
 178 #define BYP_CAL_MASK            0x02000000
 179
 180 void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 181                 u8 serdes_prtcl_map[SERDES_PRCTL_COUNT])
 182 {
 183         ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 184         u32 cfg;
 185         int lane;
 186
 187         memset(serdes_prtcl_map, 0, sizeof(u8) * SERDES_PRCTL_COUNT);
 188 #ifdef CONFIG_SYS_FSL_ERRATUM_A007186
 189         struct ccsr_sfp_regs  __iomem *sfp_regs =
 190                         (struct ccsr_sfp_regs __iomem *)(CONFIG_SYS_SFP_ADDR);
 191         u32 pll_num, pll_status, bc, dc, fc, pll_cr_upd, pll_cr0, pll_cr1;
 192         u32 bc_status, fc_status, dc_status, pll_sr2;
 193         serdes_corenet_t  __iomem *srds_regs = (void *)sd_addr;
 194         u32 sfp_spfr0, sel;
 195 #endif
 196
 197         cfg = in_be32(&gur->rcwsr[4]) & sd_prctl_mask;
 198
 199 /* Erratum A-007186
 200  * Freescale Scratch Pad Fuse Register n (SFP_FSPFR0)
 201  * The workaround requires factory pre-set SerDes calibration values to be
 202  * read from a fuse block(Freescale Scratch Pad Fuse Register SFP_FSPFR0)
 203  * These values have been shown to work across the
 204  * entire temperature range for all SerDes. These values are then written into
 205  * the SerDes registers to calibrate the SerDes PLL.
 206  *
 207  * This workaround for the protocols and rates that only have the Ring VCO.
 208  */
 209 #ifdef CONFIG_SYS_FSL_ERRATUM_A007186
 210         sfp_spfr0 = in_be32(&sfp_regs->fsl_spfr0);
 211         debug("A007186: sfp_spfr0= %x\n", sfp_spfr0);
 212
 213         sel = (sfp_spfr0 >> FUSE_VAL_SHIFT) & FUSE_VAL_MASK;
 214
 215         if (has_erratum_a007186() && (sel == 0x01 || sel == 0x02)) {
 216                 for (pll_num = 0; pll_num < SRDS_MAX_BANK; pll_num++) {
 217                         pll_status = in_be32(&srds_regs->bank[pll_num].pllcr0);
 218                         debug("A007186: pll_num=%x pllcr0=%x\n",
 219                               pll_num, pll_status);
 220                         /* STEP 1 */
 221                         /* Read factory pre-set SerDes calibration values
 222                          * from fuse block(SFP scratch register-sfp_spfr0)
 223                          */
 224                         switch (pll_status & SRDS_PLLCR0_FRATE_SEL_MASK) {
 225                         case SRDS_PLLCR0_FRATE_SEL_3_0:
 226                         case SRDS_PLLCR0_FRATE_SEL_3_072:
 227                                 debug("A007186: 3.0/3.072 protocol rate\n");
 228                                 bc = (sfp_spfr0 >> BC1_SHIFT) & BC_MASK;
 229                                 dc = (sfp_spfr0 >> DC1_SHIFT) & DC_MASK;
 230                                 fc = (sfp_spfr0 >> FC1_SHIFT) & FC_MASK;
 231                                 break;
 232                         case SRDS_PLLCR0_FRATE_SEL_3_125:
 233                                 debug("A007186: 3.125 protocol rate\n");
 234                                 bc = (sfp_spfr0 >> BC2_SHIFT) & BC_MASK;
 235                                 dc = (sfp_spfr0 >> DC2_SHIFT) & DC_MASK;
 236                                 fc = (sfp_spfr0 >> FC2_SHIFT) & FC_MASK;
 237                                 break;
 238                         case SRDS_PLLCR0_FRATE_SEL_3_75:
 239                                 debug("A007186: 3.75 protocol rate\n");
 240                                 bc = (sfp_spfr0 >> BC1_SHIFT) & BC_MASK;
 241                                 dc = (sfp_spfr0 >> DC1_SHIFT) & DC_MASK;
 242                                 fc = (sfp_spfr0 >> FC1_SHIFT) & FC_MASK;
 243                                 break;
 244                         default:
 245                                 continue;
 246                         }
 247
 248                         /* STEP 2 */
 249                         /* Write SRDSxPLLnCR1[11:16] = FC
 250                          * Write SRDSxPLLnCR1[2] = BC
 251                          */
 252                         pll_cr1 = in_be32(&srds_regs->bank[pll_num].pllcr1);
 253                         pll_cr_upd = (((bc << CR1_BCAP_SHIFT) & BCAP_MASK) |
 254                                       ((fc << CR1_FCAP_SHIFT) & FCAP_MASK));
 255                         out_be32(&srds_regs->bank[pll_num].pllcr1,
 256                                  (pll_cr_upd | pll_cr1));
 257                         debug("A007186: pll_num=%x Updated PLLCR1=%x\n",
 258                               pll_num, (pll_cr_upd | pll_cr1));
 259                         /* Write SRDSxPLLnCR0[24:26] = DC
 260                          */
 261                         pll_cr0 = in_be32(&srds_regs->bank[pll_num].pllcr0);
 262                         out_be32(&srds_regs->bank[pll_num].pllcr0,
 263                                  pll_cr0 | (dc << CR0_DCBIAS_SHIFT));
 264                         debug("A007186: pll_num=%x, Updated PLLCR0=%x\n",
 265                               pll_num, (pll_cr0 | (dc << CR0_DCBIAS_SHIFT)));
 266                         /* Write SRDSxPLLnCR1[3] = 1
 267                          * Write SRDSxPLLnCR1[6] = 1
 268                          */
 269                         pll_cr1 = in_be32(&srds_regs->bank[pll_num].pllcr1);
 270                         pll_cr_upd = (BCAP_OVD_MASK | BYP_CAL_MASK);
 271                         out_be32(&srds_regs->bank[pll_num].pllcr1,
 272                                  (pll_cr_upd | pll_cr1));
 273                         debug("A007186: pll_num=%x Updated PLLCR1=%x\n",
 274                               pll_num, (pll_cr_upd | pll_cr1));
 275
 276                         /* STEP 3 */
 277                         /* Read the status Registers */
 278                         /* Verify SRDSxPLLnSR2[8] = BC */
 279                         pll_sr2 = in_be32(&srds_regs->bank[pll_num].pllsr2);
 280                         debug("A007186: pll_num=%x pllsr2=%x\n",
 281                               pll_num, pll_sr2);
 282                         bc_status = (pll_sr2 >> 23) & BC_MASK;
 283                         if (bc_status != bc)
 284                                 debug("BC mismatch\n");
 285                         fc_status = (pll_sr2 >> 16) & FC_MASK;
 286                         if (fc_status != fc)
 287                                 debug("FC mismatch\n");
 288                         pll_cr0 = in_be32(&srds_regs->bank[pll_num].pllcr0);
 289                         out_be32(&srds_regs->bank[pll_num].pllcr0, pll_cr0 |
 290                                                                 0x02000000);
 291                         pll_sr2 = in_be32(&srds_regs->bank[pll_num].pllsr2);
 292                         dc_status = (pll_sr2 >> 17) & DC_MASK;
 293                         if (dc_status != dc)
 294                                 debug("DC mismatch\n");
 295                         pll_cr0 = in_be32(&srds_regs->bank[pll_num].pllcr0);
 296                         out_be32(&srds_regs->bank[pll_num].pllcr0, pll_cr0 &
 297                                                                 0xfdffffff);
 298
 299                         /* STEP 4 */
 300                         /* Wait 750us to verify the PLL is locked
 301                          * by checking SRDSxPLLnCR0[8] = 1.
 302                          */
 303                         udelay(750);
 304                         pll_status = in_be32(&srds_regs->bank[pll_num].pllcr0);
 305                         debug("A007186: pll_num=%x pllcr0=%x\n",
 306                               pll_num, pll_status);
 307
 308                         if ((pll_status & SRDS_PLLCR0_PLL_LCK) == 0)
 309                                 printf("A007186 Serdes PLL not locked\n");
 310                         else
 311                                 debug("A007186 Serdes PLL locked\n");
 312                 }
 313         }
 314 #endif
 315
 316         cfg >>= sd_prctl_shift;
 317         printf("Using SERDES%d Protocol: %d (0x%x)\n", sd + 1, cfg, cfg);
 318         if (!is_serdes_prtcl_valid(sd, cfg))
 319                 printf("SERDES%d[PRTCL] = 0x%x is not valid\n", sd + 1, cfg);
 320
 321         for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
 322                 enum srds_prtcl lane_prtcl = serdes_get_prtcl(sd, cfg, lane);
 323                 if (unlikely(lane_prtcl >= SERDES_PRCTL_COUNT))
 324                         debug("Unknown SerDes lane protocol %d\n", lane_prtcl);
 325                 else
 326                         serdes_prtcl_map[lane_prtcl] = 1;
 327         }
 328 }
 329
 330 void fsl_serdes_init(void)
 331 {
 332
 333 #ifdef CONFIG_SYS_FSL_SRDS_1
 334         serdes_init(FSL_SRDS_1,
 335                     CONFIG_SYS_FSL_CORENET_SERDES_ADDR,
 336                     FSL_CORENET2_RCWSR4_SRDS1_PRTCL,
 337                     FSL_CORENET2_RCWSR4_SRDS1_PRTCL_SHIFT,
 338                     serdes1_prtcl_map);
 339 #endif
 340 #ifdef CONFIG_SYS_FSL_SRDS_2
 341         serdes_init(FSL_SRDS_2,
 342                     CONFIG_SYS_FSL_CORENET_SERDES_ADDR + FSL_SRDS_2 * 0x1000,
 343                     FSL_CORENET2_RCWSR4_SRDS2_PRTCL,
 344                     FSL_CORENET2_RCWSR4_SRDS2_PRTCL_SHIFT,
 345                     serdes2_prtcl_map);
 346 #endif
 347 #ifdef CONFIG_SYS_FSL_SRDS_3
 348         serdes_init(FSL_SRDS_3,
 349                     CONFIG_SYS_FSL_CORENET_SERDES_ADDR + FSL_SRDS_3 * 0x1000,
 350                     FSL_CORENET2_RCWSR4_SRDS3_PRTCL,
 351                     FSL_CORENET2_RCWSR4_SRDS3_PRTCL_SHIFT,
 352                     serdes3_prtcl_map);
 353 #endif
 354 #ifdef CONFIG_SYS_FSL_SRDS_4
 355         serdes_init(FSL_SRDS_4,
 356                     CONFIG_SYS_FSL_CORENET_SERDES_ADDR + FSL_SRDS_4 * 0x1000,
 357                     FSL_CORENET2_RCWSR4_SRDS4_PRTCL,
 358                     FSL_CORENET2_RCWSR4_SRDS4_PRTCL_SHIFT,
 359                     serdes4_prtcl_map);
 360 #endif
 361
 362 }
 363
 364 const char *serdes_clock_to_string(u32 clock)
 365 {
 366         switch (clock) {
 367         case SRDS_PLLCR0_RFCK_SEL_100:
 368                 return "100";
 369         case SRDS_PLLCR0_RFCK_SEL_125:
 370                 return "125";
 371         case SRDS_PLLCR0_RFCK_SEL_156_25:
 372                 return "156.25";
 373         case SRDS_PLLCR0_RFCK_SEL_161_13:
 374                 return "161.1328123";
 375         default:
 376 #if defined(CONFIG_T4240QDS)
 377                 return "???";
 378 #else
 379                 return "122.88";
 380 #endif
 381         }
 382 }
 383