drivers/staging/octeon/cvmx-mdio.h

   1 /***********************license start***************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2008 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26  ***********************license end**************************************/
  27
  28 /*
  29  *
  30  * Interface to the SMI/MDIO hardware, including support for both IEEE 802.3
  31  * clause 22 and clause 45 operations.
  32  *
  33  */
  34
  35 #ifndef __CVMX_MIO_H__
  36 #define __CVMX_MIO_H__
  37
  38 #include "cvmx-smix-defs.h"
  39
  40 /**
  41  * PHY register 0 from the 802.3 spec
  42  */
  43 #define CVMX_MDIO_PHY_REG_CONTROL 0
  44 typedef union {
  45         uint16_t u16;
  46         struct {
  47                 uint16_t reset:1;
  48                 uint16_t loopback:1;
  49                 uint16_t speed_lsb:1;
  50                 uint16_t autoneg_enable:1;
  51                 uint16_t power_down:1;
  52                 uint16_t isolate:1;
  53                 uint16_t restart_autoneg:1;
  54                 uint16_t duplex:1;
  55                 uint16_t collision_test:1;
  56                 uint16_t speed_msb:1;
  57                 uint16_t unidirectional_enable:1;
  58                 uint16_t reserved_0_4:5;
  59         } s;
  60 } cvmx_mdio_phy_reg_control_t;
  61
  62 /**
  63  * PHY register 1 from the 802.3 spec
  64  */
  65 #define CVMX_MDIO_PHY_REG_STATUS 1
  66 typedef union {
  67         uint16_t u16;
  68         struct {
  69                 uint16_t capable_100base_t4:1;
  70                 uint16_t capable_100base_x_full:1;
  71                 uint16_t capable_100base_x_half:1;
  72                 uint16_t capable_10_full:1;
  73                 uint16_t capable_10_half:1;
  74                 uint16_t capable_100base_t2_full:1;
  75                 uint16_t capable_100base_t2_half:1;
  76                 uint16_t capable_extended_status:1;
  77                 uint16_t capable_unidirectional:1;
  78                 uint16_t capable_mf_preamble_suppression:1;
  79                 uint16_t autoneg_complete:1;
  80                 uint16_t remote_fault:1;
  81                 uint16_t capable_autoneg:1;
  82                 uint16_t link_status:1;
  83                 uint16_t jabber_detect:1;
  84                 uint16_t capable_extended_registers:1;
  85
  86         } s;
  87 } cvmx_mdio_phy_reg_status_t;
  88
  89 /**
  90  * PHY register 2 from the 802.3 spec
  91  */
  92 #define CVMX_MDIO_PHY_REG_ID1 2
  93 typedef union {
  94         uint16_t u16;
  95         struct {
  96                 uint16_t oui_bits_3_18;
  97         } s;
  98 } cvmx_mdio_phy_reg_id1_t;
  99
 100 /**
 101  * PHY register 3 from the 802.3 spec
 102  */
 103 #define CVMX_MDIO_PHY_REG_ID2 3
 104 typedef union {
 105         uint16_t u16;
 106         struct {
 107                 uint16_t oui_bits_19_24:6;
 108                 uint16_t model:6;
 109                 uint16_t revision:4;
 110         } s;
 111 } cvmx_mdio_phy_reg_id2_t;
 112
 113 /**
 114  * PHY register 4 from the 802.3 spec
 115  */
 116 #define CVMX_MDIO_PHY_REG_AUTONEG_ADVER 4
 117 typedef union {
 118         uint16_t u16;
 119         struct {
 120                 uint16_t next_page:1;
 121                 uint16_t reserved_14:1;
 122                 uint16_t remote_fault:1;
 123                 uint16_t reserved_12:1;
 124                 uint16_t asymmetric_pause:1;
 125                 uint16_t pause:1;
 126                 uint16_t advert_100base_t4:1;
 127                 uint16_t advert_100base_tx_full:1;
 128                 uint16_t advert_100base_tx_half:1;
 129                 uint16_t advert_10base_tx_full:1;
 130                 uint16_t advert_10base_tx_half:1;
 131                 uint16_t selector:5;
 132         } s;
 133 } cvmx_mdio_phy_reg_autoneg_adver_t;
 134
 135 /**
 136  * PHY register 5 from the 802.3 spec
 137  */
 138 #define CVMX_MDIO_PHY_REG_LINK_PARTNER_ABILITY 5
 139 typedef union {
 140         uint16_t u16;
 141         struct {
 142                 uint16_t next_page:1;
 143                 uint16_t ack:1;
 144                 uint16_t remote_fault:1;
 145                 uint16_t reserved_12:1;
 146                 uint16_t asymmetric_pause:1;
 147                 uint16_t pause:1;
 148                 uint16_t advert_100base_t4:1;
 149                 uint16_t advert_100base_tx_full:1;
 150                 uint16_t advert_100base_tx_half:1;
 151                 uint16_t advert_10base_tx_full:1;
 152                 uint16_t advert_10base_tx_half:1;
 153                 uint16_t selector:5;
 154         } s;
 155 } cvmx_mdio_phy_reg_link_partner_ability_t;
 156
 157 /**
 158  * PHY register 6 from the 802.3 spec
 159  */
 160 #define CVMX_MDIO_PHY_REG_AUTONEG_EXPANSION 6
 161 typedef union {
 162         uint16_t u16;
 163         struct {
 164                 uint16_t reserved_5_15:11;
 165                 uint16_t parallel_detection_fault:1;
 166                 uint16_t link_partner_next_page_capable:1;
 167                 uint16_t local_next_page_capable:1;
 168                 uint16_t page_received:1;
 169                 uint16_t link_partner_autoneg_capable:1;
 170
 171         } s;
 172 } cvmx_mdio_phy_reg_autoneg_expansion_t;
 173
 174 /**
 175  * PHY register 9 from the 802.3 spec
 176  */
 177 #define CVMX_MDIO_PHY_REG_CONTROL_1000 9
 178 typedef union {
 179         uint16_t u16;
 180         struct {
 181                 uint16_t test_mode:3;
 182                 uint16_t manual_master_slave:1;
 183                 uint16_t master:1;
 184                 uint16_t port_type:1;
 185                 uint16_t advert_1000base_t_full:1;
 186                 uint16_t advert_1000base_t_half:1;
 187                 uint16_t reserved_0_7:8;
 188         } s;
 189 } cvmx_mdio_phy_reg_control_1000_t;
 190
 191 /**
 192  * PHY register 10 from the 802.3 spec
 193  */
 194 #define CVMX_MDIO_PHY_REG_STATUS_1000 10
 195 typedef union {
 196         uint16_t u16;
 197         struct {
 198                 uint16_t master_slave_fault:1;
 199                 uint16_t is_master:1;
 200                 uint16_t local_receiver_ok:1;
 201                 uint16_t remote_receiver_ok:1;
 202                 uint16_t remote_capable_1000base_t_full:1;
 203                 uint16_t remote_capable_1000base_t_half:1;
 204                 uint16_t reserved_8_9:2;
 205                 uint16_t idle_error_count:8;
 206         } s;
 207 } cvmx_mdio_phy_reg_status_1000_t;
 208
 209 /**
 210  * PHY register 15 from the 802.3 spec
 211  */
 212 #define CVMX_MDIO_PHY_REG_EXTENDED_STATUS 15
 213 typedef union {
 214         uint16_t u16;
 215         struct {
 216                 uint16_t capable_1000base_x_full:1;
 217                 uint16_t capable_1000base_x_half:1;
 218                 uint16_t capable_1000base_t_full:1;
 219                 uint16_t capable_1000base_t_half:1;
 220                 uint16_t reserved_0_11:12;
 221         } s;
 222 } cvmx_mdio_phy_reg_extended_status_t;
 223
 224 /**
 225  * PHY register 13 from the 802.3 spec
 226  */
 227 #define CVMX_MDIO_PHY_REG_MMD_CONTROL 13
 228 typedef union {
 229         uint16_t u16;
 230         struct {
 231                 uint16_t function:2;
 232                 uint16_t reserved_5_13:9;
 233                 uint16_t devad:5;
 234         } s;
 235 } cvmx_mdio_phy_reg_mmd_control_t;
 236
 237 /**
 238  * PHY register 14 from the 802.3 spec
 239  */
 240 #define CVMX_MDIO_PHY_REG_MMD_ADDRESS_DATA 14
 241 typedef union {
 242         uint16_t u16;
 243         struct {
 244                 uint16_t address_data:16;
 245         } s;
 246 } cvmx_mdio_phy_reg_mmd_address_data_t;
 247
 248 /* Operating request encodings. */
 249 #define MDIO_CLAUSE_22_WRITE    0
 250 #define MDIO_CLAUSE_22_READ     1
 251
 252 #define MDIO_CLAUSE_45_ADDRESS  0
 253 #define MDIO_CLAUSE_45_WRITE    1
 254 #define MDIO_CLAUSE_45_READ_INC 2
 255 #define MDIO_CLAUSE_45_READ     3
 256
 257 /* MMD identifiers, mostly for accessing devices within XENPAK modules. */
 258 #define CVMX_MMD_DEVICE_PMA_PMD      1
 259 #define CVMX_MMD_DEVICE_WIS          2
 260 #define CVMX_MMD_DEVICE_PCS          3
 261 #define CVMX_MMD_DEVICE_PHY_XS       4
 262 #define CVMX_MMD_DEVICE_DTS_XS       5
 263 #define CVMX_MMD_DEVICE_TC           6
 264 #define CVMX_MMD_DEVICE_CL22_EXT     29
 265 #define CVMX_MMD_DEVICE_VENDOR_1     30
 266 #define CVMX_MMD_DEVICE_VENDOR_2     31
 267
 268 /* Helper function to put MDIO interface into clause 45 mode */
 269 static inline void __cvmx_mdio_set_clause45_mode(int bus_id)
 270 {
 271         union cvmx_smix_clk smi_clk;
 272         /* Put bus into clause 45 mode */
 273         smi_clk.u64 = cvmx_read_csr(CVMX_SMIX_CLK(bus_id));
 274         smi_clk.s.mode = 1;
 275         smi_clk.s.preamble = 1;
 276         cvmx_write_csr(CVMX_SMIX_CLK(bus_id), smi_clk.u64);
 277 }
 278
 279 /* Helper function to put MDIO interface into clause 22 mode */
 280 static inline void __cvmx_mdio_set_clause22_mode(int bus_id)
 281 {
 282         union cvmx_smix_clk smi_clk;
 283         /* Put bus into clause 22 mode */
 284         smi_clk.u64 = cvmx_read_csr(CVMX_SMIX_CLK(bus_id));
 285         smi_clk.s.mode = 0;
 286         cvmx_write_csr(CVMX_SMIX_CLK(bus_id), smi_clk.u64);
 287 }
 288
 289 /**
 290  * Perform an MII read. This function is used to read PHY
 291  * registers controlling auto negotiation.
 292  *
 293  * @bus_id:   MDIO bus number. Zero on most chips, but some chips (ex CN56XX)
 294  *                 support multiple busses.
 295  * @phy_id:   The MII phy id
 296  * @location: Register location to read
 297  *
 298  * Returns Result from the read or -1 on failure
 299  */
 300 static inline int cvmx_mdio_read(int bus_id, int phy_id, int location)
 301 {
 302         union cvmx_smix_cmd smi_cmd;
 303         union cvmx_smix_rd_dat smi_rd;
 304         int timeout = 1000;
 305
 306         if (octeon_has_feature(OCTEON_FEATURE_MDIO_CLAUSE_45))
 307                 __cvmx_mdio_set_clause22_mode(bus_id);
 308
 309         smi_cmd.u64 = 0;
 310         smi_cmd.s.phy_op = MDIO_CLAUSE_22_READ;
 311         smi_cmd.s.phy_adr = phy_id;
 312         smi_cmd.s.reg_adr = location;
 313         cvmx_write_csr(CVMX_SMIX_CMD(bus_id), smi_cmd.u64);
 314
 315         do {
 316                 cvmx_wait(1000);
 317                 smi_rd.u64 = cvmx_read_csr(CVMX_SMIX_RD_DAT(bus_id));
 318         } while (smi_rd.s.pending && timeout--);
 319
 320         if (smi_rd.s.val)
 321                 return smi_rd.s.dat;
 322         else
 323                 return -1;
 324 }
 325
 326 /**
 327  * Perform an MII write. This function is used to write PHY
 328  * registers controlling auto negotiation.
 329  *
 330  * @bus_id:   MDIO bus number. Zero on most chips, but some chips (ex CN56XX)
 331  *                 support multiple busses.
 332  * @phy_id:   The MII phy id
 333  * @location: Register location to write
 334  * @val:      Value to write
 335  *
 336  * Returns -1 on error
 337  *         0 on success
 338  */
 339 static inline int cvmx_mdio_write(int bus_id, int phy_id, int location, int val)
 340 {
 341         union cvmx_smix_cmd smi_cmd;
 342         union cvmx_smix_wr_dat smi_wr;
 343         int timeout = 1000;
 344
 345         if (octeon_has_feature(OCTEON_FEATURE_MDIO_CLAUSE_45))
 346                 __cvmx_mdio_set_clause22_mode(bus_id);
 347
 348         smi_wr.u64 = 0;
 349         smi_wr.s.dat = val;
 350         cvmx_write_csr(CVMX_SMIX_WR_DAT(bus_id), smi_wr.u64);
 351
 352         smi_cmd.u64 = 0;
 353         smi_cmd.s.phy_op = MDIO_CLAUSE_22_WRITE;
 354         smi_cmd.s.phy_adr = phy_id;
 355         smi_cmd.s.reg_adr = location;
 356         cvmx_write_csr(CVMX_SMIX_CMD(bus_id), smi_cmd.u64);
 357
 358         do {
 359                 cvmx_wait(1000);
 360                 smi_wr.u64 = cvmx_read_csr(CVMX_SMIX_WR_DAT(bus_id));
 361         } while (smi_wr.s.pending && --timeout);
 362         if (timeout <= 0)
 363                 return -1;
 364
 365         return 0;
 366 }
 367
 368 /**
 369  * Perform an IEEE 802.3 clause 45 MII read. This function is used to
 370  * read PHY registers controlling auto negotiation.
 371  *
 372  * @bus_id:   MDIO bus number. Zero on most chips, but some chips (ex CN56XX)
 373  *                 support multiple busses.
 374  * @phy_id:   The MII phy id
 375  * @device:   MDIO Managable Device (MMD) id
 376  * @location: Register location to read
 377  *
 378  * Returns Result from the read or -1 on failure
 379  */
 380
 381 static inline int cvmx_mdio_45_read(int bus_id, int phy_id, int device,
 382                                     int location)
 383 {
 384         union cvmx_smix_cmd smi_cmd;
 385         union cvmx_smix_rd_dat smi_rd;
 386         union cvmx_smix_wr_dat smi_wr;
 387         int timeout = 1000;
 388
 389         if (!octeon_has_feature(OCTEON_FEATURE_MDIO_CLAUSE_45))
 390                 return -1;
 391
 392         __cvmx_mdio_set_clause45_mode(bus_id);
 393
 394         smi_wr.u64 = 0;
 395         smi_wr.s.dat = location;
 396         cvmx_write_csr(CVMX_SMIX_WR_DAT(bus_id), smi_wr.u64);
 397
 398         smi_cmd.u64 = 0;
 399         smi_cmd.s.phy_op = MDIO_CLAUSE_45_ADDRESS;
 400         smi_cmd.s.phy_adr = phy_id;
 401         smi_cmd.s.reg_adr = device;
 402         cvmx_write_csr(CVMX_SMIX_CMD(bus_id), smi_cmd.u64);
 403
 404         do {
 405                 cvmx_wait(1000);
 406                 smi_wr.u64 = cvmx_read_csr(CVMX_SMIX_WR_DAT(bus_id));
 407         } while (smi_wr.s.pending && --timeout);
 408         if (timeout <= 0) {
 409                 cvmx_dprintf("cvmx_mdio_45_read: bus_id %d phy_id %2d "
 410                              "device %2d register %2d   TIME OUT(address)\n",
 411                      bus_id, phy_id, device, location);
 412                 return -1;
 413         }
 414
 415         smi_cmd.u64 = 0;
 416         smi_cmd.s.phy_op = MDIO_CLAUSE_45_READ;
 417         smi_cmd.s.phy_adr = phy_id;
 418         smi_cmd.s.reg_adr = device;
 419         cvmx_write_csr(CVMX_SMIX_CMD(bus_id), smi_cmd.u64);
 420
 421         do {
 422                 cvmx_wait(1000);
 423                 smi_rd.u64 = cvmx_read_csr(CVMX_SMIX_RD_DAT(bus_id));
 424         } while (smi_rd.s.pending && --timeout);
 425
 426         if (timeout <= 0) {
 427                 cvmx_dprintf("cvmx_mdio_45_read: bus_id %d phy_id %2d "
 428                              "device %2d register %2d   TIME OUT(data)\n",
 429                      bus_id, phy_id, device, location);
 430                 return -1;
 431         }
 432
 433         if (smi_rd.s.val)
 434                 return smi_rd.s.dat;
 435         else {
 436                 cvmx_dprintf("cvmx_mdio_45_read: bus_id %d phy_id %2d "
 437                              "device %2d register %2d   INVALID READ\n",
 438                      bus_id, phy_id, device, location);
 439                 return -1;
 440         }
 441 }
 442
 443 /**
 444  * Perform an IEEE 802.3 clause 45 MII write. This function is used to
 445  * write PHY registers controlling auto negotiation.
 446  *
 447  * @bus_id:   MDIO bus number. Zero on most chips, but some chips (ex CN56XX)
 448  *                 support multiple busses.
 449  * @phy_id:   The MII phy id
 450  * @device:   MDIO Managable Device (MMD) id
 451  * @location: Register location to write
 452  * @val:      Value to write
 453  *
 454  * Returns -1 on error
 455  *         0 on success
 456  */
 457 static inline int cvmx_mdio_45_write(int bus_id, int phy_id, int device,
 458                                      int location, int val)
 459 {
 460         union cvmx_smix_cmd smi_cmd;
 461         union cvmx_smix_wr_dat smi_wr;
 462         int timeout = 1000;
 463
 464         if (!octeon_has_feature(OCTEON_FEATURE_MDIO_CLAUSE_45))
 465                 return -1;
 466
 467         __cvmx_mdio_set_clause45_mode(bus_id);
 468
 469         smi_wr.u64 = 0;
 470         smi_wr.s.dat = location;
 471         cvmx_write_csr(CVMX_SMIX_WR_DAT(bus_id), smi_wr.u64);
 472
 473         smi_cmd.u64 = 0;
 474         smi_cmd.s.phy_op = MDIO_CLAUSE_45_ADDRESS;
 475         smi_cmd.s.phy_adr = phy_id;
 476         smi_cmd.s.reg_adr = device;
 477         cvmx_write_csr(CVMX_SMIX_CMD(bus_id), smi_cmd.u64);
 478
 479         do {
 480                 cvmx_wait(1000);
 481                 smi_wr.u64 = cvmx_read_csr(CVMX_SMIX_WR_DAT(bus_id));
 482         } while (smi_wr.s.pending && --timeout);
 483         if (timeout <= 0)
 484                 return -1;
 485
 486         smi_wr.u64 = 0;
 487         smi_wr.s.dat = val;
 488         cvmx_write_csr(CVMX_SMIX_WR_DAT(bus_id), smi_wr.u64);
 489
 490         smi_cmd.u64 = 0;
 491         smi_cmd.s.phy_op = MDIO_CLAUSE_45_WRITE;
 492         smi_cmd.s.phy_adr = phy_id;
 493         smi_cmd.s.reg_adr = device;
 494         cvmx_write_csr(CVMX_SMIX_CMD(bus_id), smi_cmd.u64);
 495
 496         do {
 497                 cvmx_wait(1000);
 498                 smi_wr.u64 = cvmx_read_csr(CVMX_SMIX_WR_DAT(bus_id));
 499         } while (smi_wr.s.pending && --timeout);
 500         if (timeout <= 0)
 501                 return -1;
 502
 503         return 0;
 504 }
 505
 506 #endif