arch/powerpc/cpu/mpc85xx/fsl_corenet2_serdes.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2012 Freescale Semiconductor, Inc.
   4  */
   5
   6 #include <common.h>
   7 #include <log.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 <linux/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         if (!serdes1_prtcl_map[NONE])
  96                 fsl_serdes_init();
  97
  98         ret |= serdes1_prtcl_map[device];
  99 #endif
 100 #ifdef CONFIG_SYS_FSL_SRDS_2
 101         if (!serdes2_prtcl_map[NONE])
 102                 fsl_serdes_init();
 103
 104         ret |= serdes2_prtcl_map[device];
 105 #endif
 106 #ifdef CONFIG_SYS_FSL_SRDS_3
 107         if (!serdes3_prtcl_map[NONE])
 108                 fsl_serdes_init();
 109
 110         ret |= serdes3_prtcl_map[device];
 111 #endif
 112 #ifdef CONFIG_SYS_FSL_SRDS_4
 113         if (!serdes4_prtcl_map[NONE])
 114                 fsl_serdes_init();
 115
 116         ret |= serdes4_prtcl_map[device];
 117 #endif
 118
 119         return !!ret;
 120 }
 121
 122 int serdes_get_first_lane(u32 sd, enum srds_prtcl device)
 123 {
 124         const ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 125         u32 cfg = in_be32(&gur->rcwsr[4]);
 126         int i;
 127
 128         switch (sd) {
 129 #ifdef CONFIG_SYS_FSL_SRDS_1
 130         case FSL_SRDS_1:
 131                 cfg &= FSL_CORENET2_RCWSR4_SRDS1_PRTCL;
 132                 cfg >>= FSL_CORENET2_RCWSR4_SRDS1_PRTCL_SHIFT;
 133                 break;
 134 #endif
 135 #ifdef CONFIG_SYS_FSL_SRDS_2
 136         case FSL_SRDS_2:
 137                 cfg &= FSL_CORENET2_RCWSR4_SRDS2_PRTCL;
 138                 cfg >>= FSL_CORENET2_RCWSR4_SRDS2_PRTCL_SHIFT;
 139                 break;
 140 #endif
 141 #ifdef CONFIG_SYS_FSL_SRDS_3
 142         case FSL_SRDS_3:
 143                 cfg &= FSL_CORENET2_RCWSR4_SRDS3_PRTCL;
 144                 cfg >>= FSL_CORENET2_RCWSR4_SRDS3_PRTCL_SHIFT;
 145                 break;
 146 #endif
 147 #ifdef CONFIG_SYS_FSL_SRDS_4
 148         case FSL_SRDS_4:
 149                 cfg &= FSL_CORENET2_RCWSR4_SRDS4_PRTCL;
 150                 cfg >>= FSL_CORENET2_RCWSR4_SRDS4_PRTCL_SHIFT;
 151                 break;
 152 #endif
 153         default:
 154                 printf("invalid SerDes%d\n", sd);
 155                 break;
 156         }
 157         /* Is serdes enabled at all? */
 158         if (unlikely(cfg == 0))
 159                 return -ENODEV;
 160
 161         for (i = 0; i < SRDS_MAX_LANES; i++) {
 162                 if (serdes_get_prtcl(sd, cfg, i) == device)
 163                         return i;
 164         }
 165
 166         return -ENODEV;
 167 }
 168
 169 #define BC3_SHIFT       9
 170 #define DC3_SHIFT       6
 171 #define FC3_SHIFT       0
 172 #define BC2_SHIFT       19
 173 #define DC2_SHIFT       16
 174 #define FC2_SHIFT       10
 175 #define BC1_SHIFT       29
 176 #define DC1_SHIFT       26
 177 #define FC1_SHIFT       20
 178 #define BC_MASK         0x1
 179 #define DC_MASK         0x7
 180 #define FC_MASK         0x3F
 181
 182 #define FUSE_VAL_MASK           0x00000003
 183 #define FUSE_VAL_SHIFT          30
 184 #define CR0_DCBIAS_SHIFT        5
 185 #define CR1_FCAP_SHIFT          15
 186 #define CR1_BCAP_SHIFT          29
 187 #define FCAP_MASK               0x001F8000
 188 #define BCAP_MASK               0x20000000
 189 #define BCAP_OVD_MASK           0x10000000
 190 #define BYP_CAL_MASK            0x02000000
 191
 192 void serdes_init(u32 sd, u32 sd_addr, u32 sd_prctl_mask, u32 sd_prctl_shift,
 193                 u8 serdes_prtcl_map[SERDES_PRCTL_COUNT])
 194 {
 195         ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 196         u32 cfg;
 197         int lane;
 198
 199         if (serdes_prtcl_map[NONE])
 200                 return;
 201
 202         memset(serdes_prtcl_map, 0, sizeof(u8) * SERDES_PRCTL_COUNT);
 203 #ifdef CONFIG_SYS_FSL_ERRATUM_A007186
 204         struct ccsr_sfp_regs  __iomem *sfp_regs =
 205                         (struct ccsr_sfp_regs __iomem *)(CONFIG_SYS_SFP_ADDR);
 206         u32 pll_num, pll_status, bc, dc, fc, pll_cr_upd, pll_cr0, pll_cr1;
 207         u32 bc_status, fc_status, dc_status, pll_sr2;
 208         serdes_corenet_t  __iomem *srds_regs = (void *)sd_addr;
 209         u32 sfp_spfr0, sel;
 210 #endif
 211
 212         cfg = in_be32(&gur->rcwsr[4]) & sd_prctl_mask;
 213
 214 /* Erratum A-007186
 215  * Freescale Scratch Pad Fuse Register n (SFP_FSPFR0)
 216  * The workaround requires factory pre-set SerDes calibration values to be
 217  * read from a fuse block(Freescale Scratch Pad Fuse Register SFP_FSPFR0)
 218  * These values have been shown to work across the
 219  * entire temperature range for all SerDes. These values are then written into
 220  * the SerDes registers to calibrate the SerDes PLL.
 221  *
 222  * This workaround for the protocols and rates that only have the Ring VCO.
 223  */
 224 #ifdef CONFIG_SYS_FSL_ERRATUM_A007186
 225         sfp_spfr0 = in_be32(&sfp_regs->fsl_spfr0);
 226         debug("A007186: sfp_spfr0= %x\n", sfp_spfr0);
 227
 228         sel = (sfp_spfr0 >> FUSE_VAL_SHIFT) & FUSE_VAL_MASK;
 229
 230         if (has_erratum_a007186() && (sel == 0x01 || sel == 0x02)) {
 231                 for (pll_num = 0; pll_num < SRDS_MAX_BANK; pll_num++) {
 232                         pll_status = in_be32(&srds_regs->bank[pll_num].pllcr0);
 233                         debug("A007186: pll_num=%x pllcr0=%x\n",
 234                               pll_num, pll_status);
 235                         /* STEP 1 */
 236                         /* Read factory pre-set SerDes calibration values
 237                          * from fuse block(SFP scratch register-sfp_spfr0)
 238                          */
 239                         switch (pll_status & SRDS_PLLCR0_FRATE_SEL_MASK) {
 240                         case SRDS_PLLCR0_FRATE_SEL_3_0:
 241                         case SRDS_PLLCR0_FRATE_SEL_3_072:
 242                                 debug("A007186: 3.0/3.072 protocol rate\n");
 243                                 bc = (sfp_spfr0 >> BC1_SHIFT) & BC_MASK;
 244                                 dc = (sfp_spfr0 >> DC1_SHIFT) & DC_MASK;
 245                                 fc = (sfp_spfr0 >> FC1_SHIFT) & FC_MASK;
 246                                 break;
 247                         case SRDS_PLLCR0_FRATE_SEL_3_125:
 248                                 debug("A007186: 3.125 protocol rate\n");
 249                                 bc = (sfp_spfr0 >> BC2_SHIFT) & BC_MASK;
 250                                 dc = (sfp_spfr0 >> DC2_SHIFT) & DC_MASK;
 251                                 fc = (sfp_spfr0 >> FC2_SHIFT) & FC_MASK;
 252                                 break;
 253                         case SRDS_PLLCR0_FRATE_SEL_3_75:
 254                                 debug("A007186: 3.75 protocol rate\n");
 255                                 bc = (sfp_spfr0 >> BC1_SHIFT) & BC_MASK;
 256                                 dc = (sfp_spfr0 >> DC1_SHIFT) & DC_MASK;
 257                                 fc = (sfp_spfr0 >> FC1_SHIFT) & FC_MASK;
 258                                 break;
 259                         default:
 260                                 continue;
 261                         }
 262
 263                         /* STEP 2 */
 264                         /* Write SRDSxPLLnCR1[11:16] = FC
 265                          * Write SRDSxPLLnCR1[2] = BC
 266                          */
 267                         pll_cr1 = in_be32(&srds_regs->bank[pll_num].pllcr1);
 268                         pll_cr_upd = (((bc << CR1_BCAP_SHIFT) & BCAP_MASK) |
 269                                       ((fc << CR1_FCAP_SHIFT) & FCAP_MASK));
 270                         out_be32(&srds_regs->bank[pll_num].pllcr1,
 271                                  (pll_cr_upd | pll_cr1));
 272                         debug("A007186: pll_num=%x Updated PLLCR1=%x\n",
 273                               pll_num, (pll_cr_upd | pll_cr1));
 274                         /* Write SRDSxPLLnCR0[24:26] = DC
 275                          */
 276                         pll_cr0 = in_be32(&srds_regs->bank[pll_num].pllcr0);
 277                         out_be32(&srds_regs->bank[pll_num].pllcr0,
 278                                  pll_cr0 | (dc << CR0_DCBIAS_SHIFT));
 279                         debug("A007186: pll_num=%x, Updated PLLCR0=%x\n",
 280                               pll_num, (pll_cr0 | (dc << CR0_DCBIAS_SHIFT)));
 281                         /* Write SRDSxPLLnCR1[3] = 1
 282                          * Write SRDSxPLLnCR1[6] = 1
 283                          */
 284                         pll_cr1 = in_be32(&srds_regs->bank[pll_num].pllcr1);
 285                         pll_cr_upd = (BCAP_OVD_MASK | BYP_CAL_MASK);
 286                         out_be32(&srds_regs->bank[pll_num].pllcr1,
 287                                  (pll_cr_upd | pll_cr1));
 288                         debug("A007186: pll_num=%x Updated PLLCR1=%x\n",
 289                               pll_num, (pll_cr_upd | pll_cr1));
 290
 291                         /* STEP 3 */
 292                         /* Read the status Registers */
 293                         /* Verify SRDSxPLLnSR2[8] = BC */
 294                         pll_sr2 = in_be32(&srds_regs->bank[pll_num].pllsr2);
 295                         debug("A007186: pll_num=%x pllsr2=%x\n",
 296                               pll_num, pll_sr2);
 297                         bc_status = (pll_sr2 >> 23) & BC_MASK;
 298                         if (bc_status != bc)
 299                                 debug("BC mismatch\n");
 300                         fc_status = (pll_sr2 >> 16) & FC_MASK;
 301                         if (fc_status != fc)
 302                                 debug("FC mismatch\n");
 303                         pll_cr0 = in_be32(&srds_regs->bank[pll_num].pllcr0);
 304                         out_be32(&srds_regs->bank[pll_num].pllcr0, pll_cr0 |
 305                                                                 0x02000000);
 306                         pll_sr2 = in_be32(&srds_regs->bank[pll_num].pllsr2);
 307                         dc_status = (pll_sr2 >> 17) & DC_MASK;
 308                         if (dc_status != dc)
 309                                 debug("DC mismatch\n");
 310                         pll_cr0 = in_be32(&srds_regs->bank[pll_num].pllcr0);
 311                         out_be32(&srds_regs->bank[pll_num].pllcr0, pll_cr0 &
 312                                                                 0xfdffffff);
 313
 314                         /* STEP 4 */
 315                         /* Wait 750us to verify the PLL is locked
 316                          * by checking SRDSxPLLnCR0[8] = 1.
 317                          */
 318                         udelay(750);
 319                         pll_status = in_be32(&srds_regs->bank[pll_num].pllcr0);
 320                         debug("A007186: pll_num=%x pllcr0=%x\n",
 321                               pll_num, pll_status);
 322
 323                         if ((pll_status & SRDS_PLLCR0_PLL_LCK) == 0)
 324                                 printf("A007186 Serdes PLL not locked\n");
 325                         else
 326                                 debug("A007186 Serdes PLL locked\n");
 327                 }
 328         }
 329 #endif
 330
 331         cfg >>= sd_prctl_shift;
 332         printf("Using SERDES%d Protocol: %d (0x%x)\n", sd + 1, cfg, cfg);
 333         if (!is_serdes_prtcl_valid(sd, cfg))
 334                 printf("SERDES%d[PRTCL] = 0x%x is not valid\n", sd + 1, cfg);
 335
 336         for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
 337                 enum srds_prtcl lane_prtcl = serdes_get_prtcl(sd, cfg, lane);
 338                 if (unlikely(lane_prtcl >= SERDES_PRCTL_COUNT))
 339                         debug("Unknown SerDes lane protocol %d\n", lane_prtcl);
 340                 else
 341                         serdes_prtcl_map[lane_prtcl] = 1;
 342         }
 343
 344         /* Set the first element to indicate serdes has been initialized */
 345         serdes_prtcl_map[NONE] = 1;
 346 }
 347
 348 void fsl_serdes_init(void)
 349 {
 350
 351 #ifdef CONFIG_SYS_FSL_SRDS_1
 352         serdes_init(FSL_SRDS_1,
 353                     CONFIG_SYS_FSL_CORENET_SERDES_ADDR,
 354                     FSL_CORENET2_RCWSR4_SRDS1_PRTCL,
 355                     FSL_CORENET2_RCWSR4_SRDS1_PRTCL_SHIFT,
 356                     serdes1_prtcl_map);
 357 #endif
 358 #ifdef CONFIG_SYS_FSL_SRDS_2
 359         serdes_init(FSL_SRDS_2,
 360                     CONFIG_SYS_FSL_CORENET_SERDES_ADDR + FSL_SRDS_2 * 0x1000,
 361                     FSL_CORENET2_RCWSR4_SRDS2_PRTCL,
 362                     FSL_CORENET2_RCWSR4_SRDS2_PRTCL_SHIFT,
 363                     serdes2_prtcl_map);
 364 #endif
 365 #ifdef CONFIG_SYS_FSL_SRDS_3
 366         serdes_init(FSL_SRDS_3,
 367                     CONFIG_SYS_FSL_CORENET_SERDES_ADDR + FSL_SRDS_3 * 0x1000,
 368                     FSL_CORENET2_RCWSR4_SRDS3_PRTCL,
 369                     FSL_CORENET2_RCWSR4_SRDS3_PRTCL_SHIFT,
 370                     serdes3_prtcl_map);
 371 #endif
 372 #ifdef CONFIG_SYS_FSL_SRDS_4
 373         serdes_init(FSL_SRDS_4,
 374                     CONFIG_SYS_FSL_CORENET_SERDES_ADDR + FSL_SRDS_4 * 0x1000,
 375                     FSL_CORENET2_RCWSR4_SRDS4_PRTCL,
 376                     FSL_CORENET2_RCWSR4_SRDS4_PRTCL_SHIFT,
 377                     serdes4_prtcl_map);
 378 #endif
 379
 380 }
 381
 382 const char *serdes_clock_to_string(u32 clock)
 383 {
 384         switch (clock) {
 385         case SRDS_PLLCR0_RFCK_SEL_100:
 386                 return "100";
 387         case SRDS_PLLCR0_RFCK_SEL_125:
 388                 return "125";
 389         case SRDS_PLLCR0_RFCK_SEL_156_25:
 390                 return "156.25";
 391         case SRDS_PLLCR0_RFCK_SEL_161_13:
 392                 return "161.1328123";
 393         default:
 394 #if defined(CONFIG_TARGET_T4240QDS) || defined(CONFIG_TARGET_T4160QDS)
 395                 return "???";
 396 #else
 397                 return "122.88";
 398 #endif
 399         }
 400 }
 401