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 * Functions for SGMII initialization, configuration, 30 * and monitoring. 31 */ 32 33 #include <asm/octeon/octeon.h> 34 35 #include <asm/octeon/cvmx-config.h> 36 37 #include <asm/octeon/cvmx-mdio.h> 38 #include <asm/octeon/cvmx-helper.h> 39 #include <asm/octeon/cvmx-helper-board.h> 40 41 #include <asm/octeon/cvmx-gmxx-defs.h> 42 #include <asm/octeon/cvmx-pcsx-defs.h> 43 44 void __cvmx_interrupt_gmxx_enable(int interface); 45 void __cvmx_interrupt_pcsx_intx_en_reg_enable(int index, int block); 46 void __cvmx_interrupt_pcsxx_int_en_reg_enable(int index); 47 48 /** 49 * Perform initialization required only once for an SGMII port. 50 * 51 * @interface: Interface to init 52 * @index: Index of prot on the interface 53 * 54 * Returns Zero on success, negative on failure 55 */ 56 static int __cvmx_helper_sgmii_hardware_init_one_time(int interface, int index) 57 { 58 const uint64_t clock_mhz = cvmx_sysinfo_get()->cpu_clock_hz / 1000000; 59 union cvmx_pcsx_miscx_ctl_reg pcs_misc_ctl_reg; 60 union cvmx_pcsx_linkx_timer_count_reg pcsx_linkx_timer_count_reg; 61 union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg; 62 63 /* Disable GMX */ 64 gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 65 gmxx_prtx_cfg.s.en = 0; 66 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64); 67 68 /* 69 * Write PCS*_LINK*_TIMER_COUNT_REG[COUNT] with the 70 * appropriate value. 1000BASE-X specifies a 10ms 71 * interval. SGMII specifies a 1.6ms interval. 72 */ 73 pcs_misc_ctl_reg.u64 = 74 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); 75 pcsx_linkx_timer_count_reg.u64 = 76 cvmx_read_csr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface)); 77 if (pcs_misc_ctl_reg.s.mode) { 78 /* 1000BASE-X */ 79 pcsx_linkx_timer_count_reg.s.count = 80 (10000ull * clock_mhz) >> 10; 81 } else { 82 /* SGMII */ 83 pcsx_linkx_timer_count_reg.s.count = 84 (1600ull * clock_mhz) >> 10; 85 } 86 cvmx_write_csr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface), 87 pcsx_linkx_timer_count_reg.u64); 88 89 /* 90 * Write the advertisement register to be used as the 91 * tx_Config_Reg<D15:D0> of the autonegotiation. In 92 * 1000BASE-X mode, tx_Config_Reg<D15:D0> is PCS*_AN*_ADV_REG. 93 * In SGMII PHY mode, tx_Config_Reg<D15:D0> is 94 * PCS*_SGM*_AN_ADV_REG. In SGMII MAC mode, 95 * tx_Config_Reg<D15:D0> is the fixed value 0x4001, so this 96 * step can be skipped. 97 */ 98 if (pcs_misc_ctl_reg.s.mode) { 99 /* 1000BASE-X */ 100 union cvmx_pcsx_anx_adv_reg pcsx_anx_adv_reg; 101 pcsx_anx_adv_reg.u64 = 102 cvmx_read_csr(CVMX_PCSX_ANX_ADV_REG(index, interface)); 103 pcsx_anx_adv_reg.s.rem_flt = 0; 104 pcsx_anx_adv_reg.s.pause = 3; 105 pcsx_anx_adv_reg.s.hfd = 1; 106 pcsx_anx_adv_reg.s.fd = 1; 107 cvmx_write_csr(CVMX_PCSX_ANX_ADV_REG(index, interface), 108 pcsx_anx_adv_reg.u64); 109 } else { 110 union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg; 111 pcsx_miscx_ctl_reg.u64 = 112 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); 113 if (pcsx_miscx_ctl_reg.s.mac_phy) { 114 /* PHY Mode */ 115 union cvmx_pcsx_sgmx_an_adv_reg pcsx_sgmx_an_adv_reg; 116 pcsx_sgmx_an_adv_reg.u64 = 117 cvmx_read_csr(CVMX_PCSX_SGMX_AN_ADV_REG 118 (index, interface)); 119 pcsx_sgmx_an_adv_reg.s.link = 1; 120 pcsx_sgmx_an_adv_reg.s.dup = 1; 121 pcsx_sgmx_an_adv_reg.s.speed = 2; 122 cvmx_write_csr(CVMX_PCSX_SGMX_AN_ADV_REG 123 (index, interface), 124 pcsx_sgmx_an_adv_reg.u64); 125 } else { 126 /* MAC Mode - Nothing to do */ 127 } 128 } 129 return 0; 130 } 131 132 /** 133 * Initialize the SERTES link for the first time or after a loss 134 * of link. 135 * 136 * @interface: Interface to init 137 * @index: Index of prot on the interface 138 * 139 * Returns Zero on success, negative on failure 140 */ 141 static int __cvmx_helper_sgmii_hardware_init_link(int interface, int index) 142 { 143 union cvmx_pcsx_mrx_control_reg control_reg; 144 145 /* 146 * Take PCS through a reset sequence. 147 * PCS*_MR*_CONTROL_REG[PWR_DN] should be cleared to zero. 148 * Write PCS*_MR*_CONTROL_REG[RESET]=1 (while not changing the 149 * value of the other PCS*_MR*_CONTROL_REG bits). Read 150 * PCS*_MR*_CONTROL_REG[RESET] until it changes value to 151 * zero. 152 */ 153 control_reg.u64 = 154 cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface)); 155 if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) { 156 control_reg.s.reset = 1; 157 cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), 158 control_reg.u64); 159 if (CVMX_WAIT_FOR_FIELD64 160 (CVMX_PCSX_MRX_CONTROL_REG(index, interface), 161 union cvmx_pcsx_mrx_control_reg, reset, ==, 0, 10000)) { 162 cvmx_dprintf("SGMII%d: Timeout waiting for port %d " 163 "to finish reset\n", 164 interface, index); 165 return -1; 166 } 167 } 168 169 /* 170 * Write PCS*_MR*_CONTROL_REG[RST_AN]=1 to ensure a fresh 171 * sgmii negotiation starts. 172 */ 173 control_reg.s.rst_an = 1; 174 control_reg.s.an_en = 1; 175 control_reg.s.pwr_dn = 0; 176 cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), 177 control_reg.u64); 178 179 /* 180 * Wait for PCS*_MR*_STATUS_REG[AN_CPT] to be set, indicating 181 * that sgmii autonegotiation is complete. In MAC mode this 182 * isn't an ethernet link, but a link between Octeon and the 183 * PHY. 184 */ 185 if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) && 186 CVMX_WAIT_FOR_FIELD64(CVMX_PCSX_MRX_STATUS_REG(index, interface), 187 union cvmx_pcsx_mrx_status_reg, an_cpt, ==, 1, 188 10000)) { 189 /* cvmx_dprintf("SGMII%d: Port %d link timeout\n", interface, index); */ 190 return -1; 191 } 192 return 0; 193 } 194 195 /** 196 * Configure an SGMII link to the specified speed after the SERTES 197 * link is up. 198 * 199 * @interface: Interface to init 200 * @index: Index of prot on the interface 201 * @link_info: Link state to configure 202 * 203 * Returns Zero on success, negative on failure 204 */ 205 static int __cvmx_helper_sgmii_hardware_init_link_speed(int interface, 206 int index, 207 cvmx_helper_link_info_t 208 link_info) 209 { 210 int is_enabled; 211 union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg; 212 union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg; 213 214 /* Disable GMX before we make any changes. Remember the enable state */ 215 gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 216 is_enabled = gmxx_prtx_cfg.s.en; 217 gmxx_prtx_cfg.s.en = 0; 218 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64); 219 220 /* Wait for GMX to be idle */ 221 if (CVMX_WAIT_FOR_FIELD64 222 (CVMX_GMXX_PRTX_CFG(index, interface), union cvmx_gmxx_prtx_cfg, 223 rx_idle, ==, 1, 10000) 224 || CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(index, interface), 225 union cvmx_gmxx_prtx_cfg, tx_idle, ==, 1, 226 10000)) { 227 cvmx_dprintf 228 ("SGMII%d: Timeout waiting for port %d to be idle\n", 229 interface, index); 230 return -1; 231 } 232 233 /* Read GMX CFG again to make sure the disable completed */ 234 gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 235 236 /* 237 * Get the misc control for PCS. We will need to set the 238 * duplication amount. 239 */ 240 pcsx_miscx_ctl_reg.u64 = 241 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); 242 243 /* 244 * Use GMXENO to force the link down if the status we get says 245 * it should be down. 246 */ 247 pcsx_miscx_ctl_reg.s.gmxeno = !link_info.s.link_up; 248 249 /* Only change the duplex setting if the link is up */ 250 if (link_info.s.link_up) 251 gmxx_prtx_cfg.s.duplex = link_info.s.full_duplex; 252 253 /* Do speed based setting for GMX */ 254 switch (link_info.s.speed) { 255 case 10: 256 gmxx_prtx_cfg.s.speed = 0; 257 gmxx_prtx_cfg.s.speed_msb = 1; 258 gmxx_prtx_cfg.s.slottime = 0; 259 /* Setting from GMX-603 */ 260 pcsx_miscx_ctl_reg.s.samp_pt = 25; 261 cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64); 262 cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); 263 break; 264 case 100: 265 gmxx_prtx_cfg.s.speed = 0; 266 gmxx_prtx_cfg.s.speed_msb = 0; 267 gmxx_prtx_cfg.s.slottime = 0; 268 pcsx_miscx_ctl_reg.s.samp_pt = 0x5; 269 cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64); 270 cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); 271 break; 272 case 1000: 273 gmxx_prtx_cfg.s.speed = 1; 274 gmxx_prtx_cfg.s.speed_msb = 0; 275 gmxx_prtx_cfg.s.slottime = 1; 276 pcsx_miscx_ctl_reg.s.samp_pt = 1; 277 cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 512); 278 cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 8192); 279 break; 280 default: 281 break; 282 } 283 284 /* Write the new misc control for PCS */ 285 cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface), 286 pcsx_miscx_ctl_reg.u64); 287 288 /* Write the new GMX settings with the port still disabled */ 289 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64); 290 291 /* Read GMX CFG again to make sure the config completed */ 292 gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 293 294 /* Restore the enabled / disabled state */ 295 gmxx_prtx_cfg.s.en = is_enabled; 296 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64); 297 298 return 0; 299 } 300 301 /** 302 * Bring up the SGMII interface to be ready for packet I/O but 303 * leave I/O disabled using the GMX override. This function 304 * follows the bringup documented in 10.6.3 of the manual. 305 * 306 * @interface: Interface to bringup 307 * @num_ports: Number of ports on the interface 308 * 309 * Returns Zero on success, negative on failure 310 */ 311 static int __cvmx_helper_sgmii_hardware_init(int interface, int num_ports) 312 { 313 int index; 314 315 __cvmx_helper_setup_gmx(interface, num_ports); 316 317 for (index = 0; index < num_ports; index++) { 318 int ipd_port = cvmx_helper_get_ipd_port(interface, index); 319 __cvmx_helper_sgmii_hardware_init_one_time(interface, index); 320 /* Linux kernel driver will call ....link_set with the 321 * proper link state. In the simulator there is no 322 * link state polling and hence it is set from 323 * here. 324 */ 325 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) 326 __cvmx_helper_sgmii_link_set(ipd_port, 327 __cvmx_helper_sgmii_link_get(ipd_port)); 328 } 329 330 return 0; 331 } 332 333 int __cvmx_helper_sgmii_enumerate(int interface) 334 { 335 return 4; 336 } 337 /** 338 * Probe a SGMII interface and determine the number of ports 339 * connected to it. The SGMII interface should still be down after 340 * this call. 341 * 342 * @interface: Interface to probe 343 * 344 * Returns Number of ports on the interface. Zero to disable. 345 */ 346 int __cvmx_helper_sgmii_probe(int interface) 347 { 348 union cvmx_gmxx_inf_mode mode; 349 350 /* 351 * Due to errata GMX-700 on CN56XXp1.x and CN52XXp1.x, the 352 * interface needs to be enabled before IPD otherwise per port 353 * backpressure may not work properly 354 */ 355 mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); 356 mode.s.en = 1; 357 cvmx_write_csr(CVMX_GMXX_INF_MODE(interface), mode.u64); 358 return __cvmx_helper_sgmii_enumerate(interface); 359 } 360 361 /** 362 * Bringup and enable a SGMII interface. After this call packet 363 * I/O should be fully functional. This is called with IPD 364 * enabled but PKO disabled. 365 * 366 * @interface: Interface to bring up 367 * 368 * Returns Zero on success, negative on failure 369 */ 370 int __cvmx_helper_sgmii_enable(int interface) 371 { 372 int num_ports = cvmx_helper_ports_on_interface(interface); 373 int index; 374 375 __cvmx_helper_sgmii_hardware_init(interface, num_ports); 376 377 for (index = 0; index < num_ports; index++) { 378 union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg; 379 gmxx_prtx_cfg.u64 = 380 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); 381 gmxx_prtx_cfg.s.en = 1; 382 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), 383 gmxx_prtx_cfg.u64); 384 __cvmx_interrupt_pcsx_intx_en_reg_enable(index, interface); 385 } 386 __cvmx_interrupt_pcsxx_int_en_reg_enable(interface); 387 __cvmx_interrupt_gmxx_enable(interface); 388 return 0; 389 } 390 391 /** 392 * Return the link state of an IPD/PKO port as returned by 393 * auto negotiation. The result of this function may not match 394 * Octeon's link config if auto negotiation has changed since 395 * the last call to cvmx_helper_link_set(). 396 * 397 * @ipd_port: IPD/PKO port to query 398 * 399 * Returns Link state 400 */ 401 cvmx_helper_link_info_t __cvmx_helper_sgmii_link_get(int ipd_port) 402 { 403 cvmx_helper_link_info_t result; 404 union cvmx_pcsx_miscx_ctl_reg pcs_misc_ctl_reg; 405 int interface = cvmx_helper_get_interface_num(ipd_port); 406 int index = cvmx_helper_get_interface_index_num(ipd_port); 407 union cvmx_pcsx_mrx_control_reg pcsx_mrx_control_reg; 408 409 result.u64 = 0; 410 411 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) { 412 /* The simulator gives you a simulated 1Gbps full duplex link */ 413 result.s.link_up = 1; 414 result.s.full_duplex = 1; 415 result.s.speed = 1000; 416 return result; 417 } 418 419 pcsx_mrx_control_reg.u64 = 420 cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface)); 421 if (pcsx_mrx_control_reg.s.loopbck1) { 422 /* Force 1Gbps full duplex link for internal loopback */ 423 result.s.link_up = 1; 424 result.s.full_duplex = 1; 425 result.s.speed = 1000; 426 return result; 427 } 428 429 pcs_misc_ctl_reg.u64 = 430 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); 431 if (pcs_misc_ctl_reg.s.mode) { 432 /* 1000BASE-X */ 433 /* FIXME */ 434 } else { 435 union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg; 436 pcsx_miscx_ctl_reg.u64 = 437 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); 438 if (pcsx_miscx_ctl_reg.s.mac_phy) { 439 /* PHY Mode */ 440 union cvmx_pcsx_mrx_status_reg pcsx_mrx_status_reg; 441 union cvmx_pcsx_anx_results_reg pcsx_anx_results_reg; 442 443 /* 444 * Don't bother continuing if the SERTES low 445 * level link is down 446 */ 447 pcsx_mrx_status_reg.u64 = 448 cvmx_read_csr(CVMX_PCSX_MRX_STATUS_REG 449 (index, interface)); 450 if (pcsx_mrx_status_reg.s.lnk_st == 0) { 451 if (__cvmx_helper_sgmii_hardware_init_link 452 (interface, index) != 0) 453 return result; 454 } 455 456 /* Read the autoneg results */ 457 pcsx_anx_results_reg.u64 = 458 cvmx_read_csr(CVMX_PCSX_ANX_RESULTS_REG 459 (index, interface)); 460 if (pcsx_anx_results_reg.s.an_cpt) { 461 /* 462 * Auto negotiation is complete. Set 463 * status accordingly. 464 */ 465 result.s.full_duplex = 466 pcsx_anx_results_reg.s.dup; 467 result.s.link_up = 468 pcsx_anx_results_reg.s.link_ok; 469 switch (pcsx_anx_results_reg.s.spd) { 470 case 0: 471 result.s.speed = 10; 472 break; 473 case 1: 474 result.s.speed = 100; 475 break; 476 case 2: 477 result.s.speed = 1000; 478 break; 479 default: 480 result.s.speed = 0; 481 result.s.link_up = 0; 482 break; 483 } 484 } else { 485 /* 486 * Auto negotiation isn't 487 * complete. Return link down. 488 */ 489 result.s.speed = 0; 490 result.s.link_up = 0; 491 } 492 } else { /* MAC Mode */ 493 494 result = __cvmx_helper_board_link_get(ipd_port); 495 } 496 } 497 return result; 498 } 499 500 /** 501 * Configure an IPD/PKO port for the specified link state. This 502 * function does not influence auto negotiation at the PHY level. 503 * The passed link state must always match the link state returned 504 * by cvmx_helper_link_get(). It is normally best to use 505 * cvmx_helper_link_autoconf() instead. 506 * 507 * @ipd_port: IPD/PKO port to configure 508 * @link_info: The new link state 509 * 510 * Returns Zero on success, negative on failure 511 */ 512 int __cvmx_helper_sgmii_link_set(int ipd_port, 513 cvmx_helper_link_info_t link_info) 514 { 515 int interface = cvmx_helper_get_interface_num(ipd_port); 516 int index = cvmx_helper_get_interface_index_num(ipd_port); 517 __cvmx_helper_sgmii_hardware_init_link(interface, index); 518 return __cvmx_helper_sgmii_hardware_init_link_speed(interface, index, 519 link_info); 520 } 521 522 /** 523 * Configure a port for internal and/or external loopback. Internal 524 * loopback causes packets sent by the port to be received by 525 * Octeon. External loopback causes packets received from the wire to 526 * sent out again. 527 * 528 * @ipd_port: IPD/PKO port to loopback. 529 * @enable_internal: 530 * Non zero if you want internal loopback 531 * @enable_external: 532 * Non zero if you want external loopback 533 * 534 * Returns Zero on success, negative on failure. 535 */ 536 int __cvmx_helper_sgmii_configure_loopback(int ipd_port, int enable_internal, 537 int enable_external) 538 { 539 int interface = cvmx_helper_get_interface_num(ipd_port); 540 int index = cvmx_helper_get_interface_index_num(ipd_port); 541 union cvmx_pcsx_mrx_control_reg pcsx_mrx_control_reg; 542 union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg; 543 544 pcsx_mrx_control_reg.u64 = 545 cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface)); 546 pcsx_mrx_control_reg.s.loopbck1 = enable_internal; 547 cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), 548 pcsx_mrx_control_reg.u64); 549 550 pcsx_miscx_ctl_reg.u64 = 551 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); 552 pcsx_miscx_ctl_reg.s.loopbck2 = enable_external; 553 cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface), 554 pcsx_miscx_ctl_reg.u64); 555 556 __cvmx_helper_sgmii_hardware_init_link(interface, index); 557 return 0; 558 } 559