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 XAUI initialization, configuration, 30 * and monitoring. 31 * 32 */ 33 34 #include <asm/octeon/octeon.h> 35 36 #include <asm/octeon/cvmx-config.h> 37 38 #include <asm/octeon/cvmx-helper.h> 39 40 #include <asm/octeon/cvmx-pko-defs.h> 41 #include <asm/octeon/cvmx-gmxx-defs.h> 42 #include <asm/octeon/cvmx-pcsxx-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 int __cvmx_helper_xaui_enumerate(int interface) 49 { 50 union cvmx_gmxx_hg2_control gmx_hg2_control; 51 52 /* If HiGig2 is enabled return 16 ports, otherwise return 1 port */ 53 gmx_hg2_control.u64 = cvmx_read_csr(CVMX_GMXX_HG2_CONTROL(interface)); 54 if (gmx_hg2_control.s.hg2tx_en) 55 return 16; 56 else 57 return 1; 58 } 59 60 /** 61 * Probe a XAUI interface and determine the number of ports 62 * connected to it. The XAUI interface should still be down 63 * after this call. 64 * 65 * @interface: Interface to probe 66 * 67 * Returns Number of ports on the interface. Zero to disable. 68 */ 69 int __cvmx_helper_xaui_probe(int interface) 70 { 71 int i; 72 union cvmx_gmxx_inf_mode mode; 73 74 /* 75 * Due to errata GMX-700 on CN56XXp1.x and CN52XXp1.x, the 76 * interface needs to be enabled before IPD otherwise per port 77 * backpressure may not work properly. 78 */ 79 mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); 80 mode.s.en = 1; 81 cvmx_write_csr(CVMX_GMXX_INF_MODE(interface), mode.u64); 82 83 __cvmx_helper_setup_gmx(interface, 1); 84 85 /* 86 * Setup PKO to support 16 ports for HiGig2 virtual 87 * ports. We're pointing all of the PKO packet ports for this 88 * interface to the XAUI. This allows us to use HiGig2 89 * backpressure per port. 90 */ 91 for (i = 0; i < 16; i++) { 92 union cvmx_pko_mem_port_ptrs pko_mem_port_ptrs; 93 pko_mem_port_ptrs.u64 = 0; 94 /* 95 * We set each PKO port to have equal priority in a 96 * round robin fashion. 97 */ 98 pko_mem_port_ptrs.s.static_p = 0; 99 pko_mem_port_ptrs.s.qos_mask = 0xff; 100 /* All PKO ports map to the same XAUI hardware port */ 101 pko_mem_port_ptrs.s.eid = interface * 4; 102 pko_mem_port_ptrs.s.pid = interface * 16 + i; 103 cvmx_write_csr(CVMX_PKO_MEM_PORT_PTRS, pko_mem_port_ptrs.u64); 104 } 105 return __cvmx_helper_xaui_enumerate(interface); 106 } 107 108 /** 109 * Bringup and enable a XAUI interface. After this call packet 110 * I/O should be fully functional. This is called with IPD 111 * enabled but PKO disabled. 112 * 113 * @interface: Interface to bring up 114 * 115 * Returns Zero on success, negative on failure 116 */ 117 int __cvmx_helper_xaui_enable(int interface) 118 { 119 union cvmx_gmxx_prtx_cfg gmx_cfg; 120 union cvmx_pcsxx_control1_reg xauiCtl; 121 union cvmx_pcsxx_misc_ctl_reg xauiMiscCtl; 122 union cvmx_gmxx_tx_xaui_ctl gmxXauiTxCtl; 123 union cvmx_gmxx_rxx_int_en gmx_rx_int_en; 124 union cvmx_gmxx_tx_int_en gmx_tx_int_en; 125 union cvmx_pcsxx_int_en_reg pcsx_int_en_reg; 126 127 /* (1) Interface has already been enabled. */ 128 129 /* (2) Disable GMX. */ 130 xauiMiscCtl.u64 = cvmx_read_csr(CVMX_PCSXX_MISC_CTL_REG(interface)); 131 xauiMiscCtl.s.gmxeno = 1; 132 cvmx_write_csr(CVMX_PCSXX_MISC_CTL_REG(interface), xauiMiscCtl.u64); 133 134 /* (3) Disable GMX and PCSX interrupts. */ 135 gmx_rx_int_en.u64 = cvmx_read_csr(CVMX_GMXX_RXX_INT_EN(0, interface)); 136 cvmx_write_csr(CVMX_GMXX_RXX_INT_EN(0, interface), 0x0); 137 gmx_tx_int_en.u64 = cvmx_read_csr(CVMX_GMXX_TX_INT_EN(interface)); 138 cvmx_write_csr(CVMX_GMXX_TX_INT_EN(interface), 0x0); 139 pcsx_int_en_reg.u64 = cvmx_read_csr(CVMX_PCSXX_INT_EN_REG(interface)); 140 cvmx_write_csr(CVMX_PCSXX_INT_EN_REG(interface), 0x0); 141 142 /* (4) Bring up the PCSX and GMX reconciliation layer. */ 143 /* (4)a Set polarity and lane swapping. */ 144 /* (4)b */ 145 gmxXauiTxCtl.u64 = cvmx_read_csr(CVMX_GMXX_TX_XAUI_CTL(interface)); 146 /* Enable better IFG packing and improves performance */ 147 gmxXauiTxCtl.s.dic_en = 1; 148 gmxXauiTxCtl.s.uni_en = 0; 149 cvmx_write_csr(CVMX_GMXX_TX_XAUI_CTL(interface), gmxXauiTxCtl.u64); 150 151 /* (4)c Aply reset sequence */ 152 xauiCtl.u64 = cvmx_read_csr(CVMX_PCSXX_CONTROL1_REG(interface)); 153 xauiCtl.s.lo_pwr = 0; 154 xauiCtl.s.reset = 1; 155 cvmx_write_csr(CVMX_PCSXX_CONTROL1_REG(interface), xauiCtl.u64); 156 157 /* Wait for PCS to come out of reset */ 158 if (CVMX_WAIT_FOR_FIELD64 159 (CVMX_PCSXX_CONTROL1_REG(interface), union cvmx_pcsxx_control1_reg, 160 reset, ==, 0, 10000)) 161 return -1; 162 /* Wait for PCS to be aligned */ 163 if (CVMX_WAIT_FOR_FIELD64 164 (CVMX_PCSXX_10GBX_STATUS_REG(interface), 165 union cvmx_pcsxx_10gbx_status_reg, alignd, ==, 1, 10000)) 166 return -1; 167 /* Wait for RX to be ready */ 168 if (CVMX_WAIT_FOR_FIELD64 169 (CVMX_GMXX_RX_XAUI_CTL(interface), union cvmx_gmxx_rx_xaui_ctl, 170 status, ==, 0, 10000)) 171 return -1; 172 173 /* (6) Configure GMX */ 174 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(0, interface)); 175 gmx_cfg.s.en = 0; 176 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64); 177 178 /* Wait for GMX RX to be idle */ 179 if (CVMX_WAIT_FOR_FIELD64 180 (CVMX_GMXX_PRTX_CFG(0, interface), union cvmx_gmxx_prtx_cfg, 181 rx_idle, ==, 1, 10000)) 182 return -1; 183 /* Wait for GMX TX to be idle */ 184 if (CVMX_WAIT_FOR_FIELD64 185 (CVMX_GMXX_PRTX_CFG(0, interface), union cvmx_gmxx_prtx_cfg, 186 tx_idle, ==, 1, 10000)) 187 return -1; 188 189 /* GMX configure */ 190 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(0, interface)); 191 gmx_cfg.s.speed = 1; 192 gmx_cfg.s.speed_msb = 0; 193 gmx_cfg.s.slottime = 1; 194 cvmx_write_csr(CVMX_GMXX_TX_PRTS(interface), 1); 195 cvmx_write_csr(CVMX_GMXX_TXX_SLOT(0, interface), 512); 196 cvmx_write_csr(CVMX_GMXX_TXX_BURST(0, interface), 8192); 197 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64); 198 199 /* (7) Clear out any error state */ 200 cvmx_write_csr(CVMX_GMXX_RXX_INT_REG(0, interface), 201 cvmx_read_csr(CVMX_GMXX_RXX_INT_REG(0, interface))); 202 cvmx_write_csr(CVMX_GMXX_TX_INT_REG(interface), 203 cvmx_read_csr(CVMX_GMXX_TX_INT_REG(interface))); 204 cvmx_write_csr(CVMX_PCSXX_INT_REG(interface), 205 cvmx_read_csr(CVMX_PCSXX_INT_REG(interface))); 206 207 /* Wait for receive link */ 208 if (CVMX_WAIT_FOR_FIELD64 209 (CVMX_PCSXX_STATUS1_REG(interface), union cvmx_pcsxx_status1_reg, 210 rcv_lnk, ==, 1, 10000)) 211 return -1; 212 if (CVMX_WAIT_FOR_FIELD64 213 (CVMX_PCSXX_STATUS2_REG(interface), union cvmx_pcsxx_status2_reg, 214 xmtflt, ==, 0, 10000)) 215 return -1; 216 if (CVMX_WAIT_FOR_FIELD64 217 (CVMX_PCSXX_STATUS2_REG(interface), union cvmx_pcsxx_status2_reg, 218 rcvflt, ==, 0, 10000)) 219 return -1; 220 221 cvmx_write_csr(CVMX_GMXX_RXX_INT_EN(0, interface), gmx_rx_int_en.u64); 222 cvmx_write_csr(CVMX_GMXX_TX_INT_EN(interface), gmx_tx_int_en.u64); 223 cvmx_write_csr(CVMX_PCSXX_INT_EN_REG(interface), pcsx_int_en_reg.u64); 224 225 cvmx_helper_link_autoconf(cvmx_helper_get_ipd_port(interface, 0)); 226 227 /* (8) Enable packet reception */ 228 xauiMiscCtl.s.gmxeno = 0; 229 cvmx_write_csr(CVMX_PCSXX_MISC_CTL_REG(interface), xauiMiscCtl.u64); 230 231 gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(0, interface)); 232 gmx_cfg.s.en = 1; 233 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64); 234 235 __cvmx_interrupt_pcsx_intx_en_reg_enable(0, interface); 236 __cvmx_interrupt_pcsx_intx_en_reg_enable(1, interface); 237 __cvmx_interrupt_pcsx_intx_en_reg_enable(2, interface); 238 __cvmx_interrupt_pcsx_intx_en_reg_enable(3, interface); 239 __cvmx_interrupt_pcsxx_int_en_reg_enable(interface); 240 __cvmx_interrupt_gmxx_enable(interface); 241 242 return 0; 243 } 244 245 /** 246 * Return the link state of an IPD/PKO port as returned by 247 * auto negotiation. The result of this function may not match 248 * Octeon's link config if auto negotiation has changed since 249 * the last call to cvmx_helper_link_set(). 250 * 251 * @ipd_port: IPD/PKO port to query 252 * 253 * Returns Link state 254 */ 255 cvmx_helper_link_info_t __cvmx_helper_xaui_link_get(int ipd_port) 256 { 257 int interface = cvmx_helper_get_interface_num(ipd_port); 258 union cvmx_gmxx_tx_xaui_ctl gmxx_tx_xaui_ctl; 259 union cvmx_gmxx_rx_xaui_ctl gmxx_rx_xaui_ctl; 260 union cvmx_pcsxx_status1_reg pcsxx_status1_reg; 261 cvmx_helper_link_info_t result; 262 263 gmxx_tx_xaui_ctl.u64 = cvmx_read_csr(CVMX_GMXX_TX_XAUI_CTL(interface)); 264 gmxx_rx_xaui_ctl.u64 = cvmx_read_csr(CVMX_GMXX_RX_XAUI_CTL(interface)); 265 pcsxx_status1_reg.u64 = 266 cvmx_read_csr(CVMX_PCSXX_STATUS1_REG(interface)); 267 result.u64 = 0; 268 269 /* Only return a link if both RX and TX are happy */ 270 if ((gmxx_tx_xaui_ctl.s.ls == 0) && (gmxx_rx_xaui_ctl.s.status == 0) && 271 (pcsxx_status1_reg.s.rcv_lnk == 1)) { 272 result.s.link_up = 1; 273 result.s.full_duplex = 1; 274 result.s.speed = 10000; 275 } else { 276 /* Disable GMX and PCSX interrupts. */ 277 cvmx_write_csr(CVMX_GMXX_RXX_INT_EN(0, interface), 0x0); 278 cvmx_write_csr(CVMX_GMXX_TX_INT_EN(interface), 0x0); 279 cvmx_write_csr(CVMX_PCSXX_INT_EN_REG(interface), 0x0); 280 } 281 return result; 282 } 283 284 /** 285 * Configure an IPD/PKO port for the specified link state. This 286 * function does not influence auto negotiation at the PHY level. 287 * The passed link state must always match the link state returned 288 * by cvmx_helper_link_get(). It is normally best to use 289 * cvmx_helper_link_autoconf() instead. 290 * 291 * @ipd_port: IPD/PKO port to configure 292 * @link_info: The new link state 293 * 294 * Returns Zero on success, negative on failure 295 */ 296 int __cvmx_helper_xaui_link_set(int ipd_port, cvmx_helper_link_info_t link_info) 297 { 298 int interface = cvmx_helper_get_interface_num(ipd_port); 299 union cvmx_gmxx_tx_xaui_ctl gmxx_tx_xaui_ctl; 300 union cvmx_gmxx_rx_xaui_ctl gmxx_rx_xaui_ctl; 301 302 gmxx_tx_xaui_ctl.u64 = cvmx_read_csr(CVMX_GMXX_TX_XAUI_CTL(interface)); 303 gmxx_rx_xaui_ctl.u64 = cvmx_read_csr(CVMX_GMXX_RX_XAUI_CTL(interface)); 304 305 /* If the link shouldn't be up, then just return */ 306 if (!link_info.s.link_up) 307 return 0; 308 309 /* Do nothing if both RX and TX are happy */ 310 if ((gmxx_tx_xaui_ctl.s.ls == 0) && (gmxx_rx_xaui_ctl.s.status == 0)) 311 return 0; 312 313 /* Bring the link up */ 314 return __cvmx_helper_xaui_enable(interface); 315 } 316 317 /** 318 * Configure a port for internal and/or external loopback. Internal loopback 319 * causes packets sent by the port to be received by Octeon. External loopback 320 * causes packets received from the wire to sent out again. 321 * 322 * @ipd_port: IPD/PKO port to loopback. 323 * @enable_internal: 324 * Non zero if you want internal loopback 325 * @enable_external: 326 * Non zero if you want external loopback 327 * 328 * Returns Zero on success, negative on failure. 329 */ 330 extern int __cvmx_helper_xaui_configure_loopback(int ipd_port, 331 int enable_internal, 332 int enable_external) 333 { 334 int interface = cvmx_helper_get_interface_num(ipd_port); 335 union cvmx_pcsxx_control1_reg pcsxx_control1_reg; 336 union cvmx_gmxx_xaui_ext_loopback gmxx_xaui_ext_loopback; 337 338 /* Set the internal loop */ 339 pcsxx_control1_reg.u64 = 340 cvmx_read_csr(CVMX_PCSXX_CONTROL1_REG(interface)); 341 pcsxx_control1_reg.s.loopbck1 = enable_internal; 342 cvmx_write_csr(CVMX_PCSXX_CONTROL1_REG(interface), 343 pcsxx_control1_reg.u64); 344 345 /* Set the external loop */ 346 gmxx_xaui_ext_loopback.u64 = 347 cvmx_read_csr(CVMX_GMXX_XAUI_EXT_LOOPBACK(interface)); 348 gmxx_xaui_ext_loopback.s.en = enable_external; 349 cvmx_write_csr(CVMX_GMXX_XAUI_EXT_LOOPBACK(interface), 350 gmxx_xaui_ext_loopback.u64); 351 352 /* Take the link through a reset */ 353 return __cvmx_helper_xaui_enable(interface); 354 } 355