drivers/net/ethernet/amd/xgbe/xgbe-phy-v1.c

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This source file includes following definitions.
xgbe_phy_kr_training_pre
xgbe_phy_kr_training_post
xgbe_phy_an_outcome
xgbe_phy_an_advertising
xgbe_phy_an_config
xgbe_phy_an_mode
xgbe_phy_pcs_power_cycle
xgbe_phy_start_ratechange
xgbe_phy_complete_ratechange
xgbe_phy_kr_mode
xgbe_phy_kx_2500_mode
xgbe_phy_kx_1000_mode
xgbe_phy_cur_mode
xgbe_phy_switch_mode
xgbe_phy_get_mode
xgbe_phy_set_mode
xgbe_phy_check_mode
xgbe_phy_use_mode
xgbe_phy_valid_speed
xgbe_phy_link_status
xgbe_phy_stop
xgbe_phy_start
xgbe_phy_reset
xgbe_phy_exit
xgbe_phy_init
xgbe_init_function_ptrs_phy_v1
   1 /*
   2  * AMD 10Gb Ethernet driver
   3  *
   4  * This file is available to you under your choice of the following two
   5  * licenses:
   6  *
   7  * License 1: GPLv2
   8  *
   9  * Copyright (c) 2016 Advanced Micro Devices, Inc.
  10  *
  11  * This file is free software; you may copy, redistribute and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation, either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  * This file is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  *
  24  * This file incorporates work covered by the following copyright and
  25  * permission notice:
  26  *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
  27  *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
  28  *     Inc. unless otherwise expressly agreed to in writing between Synopsys
  29  *     and you.
  30  *
  31  *     The Software IS NOT an item of Licensed Software or Licensed Product
  32  *     under any End User Software License Agreement or Agreement for Licensed
  33  *     Product with Synopsys or any supplement thereto.  Permission is hereby
  34  *     granted, free of charge, to any person obtaining a copy of this software
  35  *     annotated with this license and the Software, to deal in the Software
  36  *     without restriction, including without limitation the rights to use,
  37  *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  38  *     of the Software, and to permit persons to whom the Software is furnished
  39  *     to do so, subject to the following conditions:
  40  *
  41  *     The above copyright notice and this permission notice shall be included
  42  *     in all copies or substantial portions of the Software.
  43  *
  44  *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
  45  *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  46  *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  47  *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
  48  *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  49  *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  50  *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  51  *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  52  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  53  *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  54  *     THE POSSIBILITY OF SUCH DAMAGE.
  55  *
  56  *
  57  * License 2: Modified BSD
  58  *
  59  * Copyright (c) 2016 Advanced Micro Devices, Inc.
  60  * All rights reserved.
  61  *
  62  * Redistribution and use in source and binary forms, with or without
  63  * modification, are permitted provided that the following conditions are met:
  64  *     * Redistributions of source code must retain the above copyright
  65  *       notice, this list of conditions and the following disclaimer.
  66  *     * Redistributions in binary form must reproduce the above copyright
  67  *       notice, this list of conditions and the following disclaimer in the
  68  *       documentation and/or other materials provided with the distribution.
  69  *     * Neither the name of Advanced Micro Devices, Inc. nor the
  70  *       names of its contributors may be used to endorse or promote products
  71  *       derived from this software without specific prior written permission.
  72  *
  73  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  74  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  75  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  76  * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
  77  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  78  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  79  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  80  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  81  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  82  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  83  *
  84  * This file incorporates work covered by the following copyright and
  85  * permission notice:
  86  *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
  87  *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
  88  *     Inc. unless otherwise expressly agreed to in writing between Synopsys
  89  *     and you.
  90  *
  91  *     The Software IS NOT an item of Licensed Software or Licensed Product
  92  *     under any End User Software License Agreement or Agreement for Licensed
  93  *     Product with Synopsys or any supplement thereto.  Permission is hereby
  94  *     granted, free of charge, to any person obtaining a copy of this software
  95  *     annotated with this license and the Software, to deal in the Software
  96  *     without restriction, including without limitation the rights to use,
  97  *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  98  *     of the Software, and to permit persons to whom the Software is furnished
  99  *     to do so, subject to the following conditions:
 100  *
 101  *     The above copyright notice and this permission notice shall be included
 102  *     in all copies or substantial portions of the Software.
 103  *
 104  *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 105  *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 106  *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 107  *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 108  *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 109  *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 110  *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 111  *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 112  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 113  *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 114  *     THE POSSIBILITY OF SUCH DAMAGE.
 115  */
 116 
 117 #include <linux/module.h>
 118 #include <linux/kmod.h>
 119 #include <linux/device.h>
 120 #include <linux/property.h>
 121 #include <linux/mdio.h>
 122 #include <linux/phy.h>
 123 
 124 #include "xgbe.h"
 125 #include "xgbe-common.h"
 126 
 127 #define XGBE_BLWC_PROPERTY              "amd,serdes-blwc"
 128 #define XGBE_CDR_RATE_PROPERTY          "amd,serdes-cdr-rate"
 129 #define XGBE_PQ_SKEW_PROPERTY           "amd,serdes-pq-skew"
 130 #define XGBE_TX_AMP_PROPERTY            "amd,serdes-tx-amp"
 131 #define XGBE_DFE_CFG_PROPERTY           "amd,serdes-dfe-tap-config"
 132 #define XGBE_DFE_ENA_PROPERTY           "amd,serdes-dfe-tap-enable"
 133 
 134 /* Default SerDes settings */
 135 #define XGBE_SPEED_1000_BLWC            1
 136 #define XGBE_SPEED_1000_CDR             0x2
 137 #define XGBE_SPEED_1000_PLL             0x0
 138 #define XGBE_SPEED_1000_PQ              0xa
 139 #define XGBE_SPEED_1000_RATE            0x3
 140 #define XGBE_SPEED_1000_TXAMP           0xf
 141 #define XGBE_SPEED_1000_WORD            0x1
 142 #define XGBE_SPEED_1000_DFE_TAP_CONFIG  0x3
 143 #define XGBE_SPEED_1000_DFE_TAP_ENABLE  0x0
 144 
 145 #define XGBE_SPEED_2500_BLWC            1
 146 #define XGBE_SPEED_2500_CDR             0x2
 147 #define XGBE_SPEED_2500_PLL             0x0
 148 #define XGBE_SPEED_2500_PQ              0xa
 149 #define XGBE_SPEED_2500_RATE            0x1
 150 #define XGBE_SPEED_2500_TXAMP           0xf
 151 #define XGBE_SPEED_2500_WORD            0x1
 152 #define XGBE_SPEED_2500_DFE_TAP_CONFIG  0x3
 153 #define XGBE_SPEED_2500_DFE_TAP_ENABLE  0x0
 154 
 155 #define XGBE_SPEED_10000_BLWC           0
 156 #define XGBE_SPEED_10000_CDR            0x7
 157 #define XGBE_SPEED_10000_PLL            0x1
 158 #define XGBE_SPEED_10000_PQ             0x12
 159 #define XGBE_SPEED_10000_RATE           0x0
 160 #define XGBE_SPEED_10000_TXAMP          0xa
 161 #define XGBE_SPEED_10000_WORD           0x7
 162 #define XGBE_SPEED_10000_DFE_TAP_CONFIG 0x1
 163 #define XGBE_SPEED_10000_DFE_TAP_ENABLE 0x7f
 164 
 165 /* Rate-change complete wait/retry count */
 166 #define XGBE_RATECHANGE_COUNT           500
 167 
 168 static const u32 xgbe_phy_blwc[] = {
 169         XGBE_SPEED_1000_BLWC,
 170         XGBE_SPEED_2500_BLWC,
 171         XGBE_SPEED_10000_BLWC,
 172 };
 173 
 174 static const u32 xgbe_phy_cdr_rate[] = {
 175         XGBE_SPEED_1000_CDR,
 176         XGBE_SPEED_2500_CDR,
 177         XGBE_SPEED_10000_CDR,
 178 };
 179 
 180 static const u32 xgbe_phy_pq_skew[] = {
 181         XGBE_SPEED_1000_PQ,
 182         XGBE_SPEED_2500_PQ,
 183         XGBE_SPEED_10000_PQ,
 184 };
 185 
 186 static const u32 xgbe_phy_tx_amp[] = {
 187         XGBE_SPEED_1000_TXAMP,
 188         XGBE_SPEED_2500_TXAMP,
 189         XGBE_SPEED_10000_TXAMP,
 190 };
 191 
 192 static const u32 xgbe_phy_dfe_tap_cfg[] = {
 193         XGBE_SPEED_1000_DFE_TAP_CONFIG,
 194         XGBE_SPEED_2500_DFE_TAP_CONFIG,
 195         XGBE_SPEED_10000_DFE_TAP_CONFIG,
 196 };
 197 
 198 static const u32 xgbe_phy_dfe_tap_ena[] = {
 199         XGBE_SPEED_1000_DFE_TAP_ENABLE,
 200         XGBE_SPEED_2500_DFE_TAP_ENABLE,
 201         XGBE_SPEED_10000_DFE_TAP_ENABLE,
 202 };
 203 
 204 struct xgbe_phy_data {
 205         /* 1000/10000 vs 2500/10000 indicator */
 206         unsigned int speed_set;
 207 
 208         /* SerDes UEFI configurable settings.
 209          *   Switching between modes/speeds requires new values for some
 210          *   SerDes settings.  The values can be supplied as device
 211          *   properties in array format.  The first array entry is for
 212          *   1GbE, second for 2.5GbE and third for 10GbE
 213          */
 214         u32 blwc[XGBE_SPEEDS];
 215         u32 cdr_rate[XGBE_SPEEDS];
 216         u32 pq_skew[XGBE_SPEEDS];
 217         u32 tx_amp[XGBE_SPEEDS];
 218         u32 dfe_tap_cfg[XGBE_SPEEDS];
 219         u32 dfe_tap_ena[XGBE_SPEEDS];
 220 };
 221 
 222 static void xgbe_phy_kr_training_pre(struct xgbe_prv_data *pdata)
 223 {
 224                 XSIR0_IOWRITE_BITS(pdata, SIR0_KR_RT_1, RESET, 1);
 225 }
 226 
 227 static void xgbe_phy_kr_training_post(struct xgbe_prv_data *pdata)
 228 {
 229                 XSIR0_IOWRITE_BITS(pdata, SIR0_KR_RT_1, RESET, 0);
 230 }
 231 
 232 static enum xgbe_mode xgbe_phy_an_outcome(struct xgbe_prv_data *pdata)
 233 {
 234         struct ethtool_link_ksettings *lks = &pdata->phy.lks;
 235         struct xgbe_phy_data *phy_data = pdata->phy_data;
 236         enum xgbe_mode mode;
 237         unsigned int ad_reg, lp_reg;
 238 
 239         XGBE_SET_LP_ADV(lks, Autoneg);
 240         XGBE_SET_LP_ADV(lks, Backplane);
 241 
 242         /* Compare Advertisement and Link Partner register 1 */
 243         ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
 244         lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA);
 245         if (lp_reg & 0x400)
 246                 XGBE_SET_LP_ADV(lks, Pause);
 247         if (lp_reg & 0x800)
 248                 XGBE_SET_LP_ADV(lks, Asym_Pause);
 249 
 250         if (pdata->phy.pause_autoneg) {
 251                 /* Set flow control based on auto-negotiation result */
 252                 pdata->phy.tx_pause = 0;
 253                 pdata->phy.rx_pause = 0;
 254 
 255                 if (ad_reg & lp_reg & 0x400) {
 256                         pdata->phy.tx_pause = 1;
 257                         pdata->phy.rx_pause = 1;
 258                 } else if (ad_reg & lp_reg & 0x800) {
 259                         if (ad_reg & 0x400)
 260                                 pdata->phy.rx_pause = 1;
 261                         else if (lp_reg & 0x400)
 262                                 pdata->phy.tx_pause = 1;
 263                 }
 264         }
 265 
 266         /* Compare Advertisement and Link Partner register 2 */
 267         ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1);
 268         lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 1);
 269         if (lp_reg & 0x80)
 270                 XGBE_SET_LP_ADV(lks, 10000baseKR_Full);
 271         if (lp_reg & 0x20) {
 272                 if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
 273                         XGBE_SET_LP_ADV(lks, 2500baseX_Full);
 274                 else
 275                         XGBE_SET_LP_ADV(lks, 1000baseKX_Full);
 276         }
 277 
 278         ad_reg &= lp_reg;
 279         if (ad_reg & 0x80) {
 280                 mode = XGBE_MODE_KR;
 281         } else if (ad_reg & 0x20) {
 282                 if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
 283                         mode = XGBE_MODE_KX_2500;
 284                 else
 285                         mode = XGBE_MODE_KX_1000;
 286         } else {
 287                 mode = XGBE_MODE_UNKNOWN;
 288         }
 289 
 290         /* Compare Advertisement and Link Partner register 3 */
 291         ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
 292         lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 2);
 293         if (lp_reg & 0xc000)
 294                 XGBE_SET_LP_ADV(lks, 10000baseR_FEC);
 295 
 296         return mode;
 297 }
 298 
 299 static void xgbe_phy_an_advertising(struct xgbe_prv_data *pdata,
 300                                     struct ethtool_link_ksettings *dlks)
 301 {
 302         struct ethtool_link_ksettings *slks = &pdata->phy.lks;
 303 
 304         XGBE_LM_COPY(dlks, advertising, slks, advertising);
 305 }
 306 
 307 static int xgbe_phy_an_config(struct xgbe_prv_data *pdata)
 308 {
 309         /* Nothing uniquely required for an configuration */
 310         return 0;
 311 }
 312 
 313 static enum xgbe_an_mode xgbe_phy_an_mode(struct xgbe_prv_data *pdata)
 314 {
 315         return XGBE_AN_MODE_CL73;
 316 }
 317 
 318 static void xgbe_phy_pcs_power_cycle(struct xgbe_prv_data *pdata)
 319 {
 320         unsigned int reg;
 321 
 322         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
 323 
 324         reg |= MDIO_CTRL1_LPOWER;
 325         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
 326 
 327         usleep_range(75, 100);
 328 
 329         reg &= ~MDIO_CTRL1_LPOWER;
 330         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
 331 }
 332 
 333 static void xgbe_phy_start_ratechange(struct xgbe_prv_data *pdata)
 334 {
 335         /* Assert Rx and Tx ratechange */
 336         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, RATECHANGE, 1);
 337 }
 338 
 339 static void xgbe_phy_complete_ratechange(struct xgbe_prv_data *pdata)
 340 {
 341         unsigned int wait;
 342         u16 status;
 343 
 344         /* Release Rx and Tx ratechange */
 345         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, RATECHANGE, 0);
 346 
 347         /* Wait for Rx and Tx ready */
 348         wait = XGBE_RATECHANGE_COUNT;
 349         while (wait--) {
 350                 usleep_range(50, 75);
 351 
 352                 status = XSIR0_IOREAD(pdata, SIR0_STATUS);
 353                 if (XSIR_GET_BITS(status, SIR0_STATUS, RX_READY) &&
 354                     XSIR_GET_BITS(status, SIR0_STATUS, TX_READY))
 355                         goto rx_reset;
 356         }
 357 
 358         netif_dbg(pdata, link, pdata->netdev, "SerDes rx/tx not ready (%#hx)\n",
 359                   status);
 360 
 361 rx_reset:
 362         /* Perform Rx reset for the DFE changes */
 363         XRXTX_IOWRITE_BITS(pdata, RXTX_REG6, RESETB_RXD, 0);
 364         XRXTX_IOWRITE_BITS(pdata, RXTX_REG6, RESETB_RXD, 1);
 365 }
 366 
 367 static void xgbe_phy_kr_mode(struct xgbe_prv_data *pdata)
 368 {
 369         struct xgbe_phy_data *phy_data = pdata->phy_data;
 370         unsigned int reg;
 371 
 372         /* Set PCS to KR/10G speed */
 373         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
 374         reg &= ~MDIO_PCS_CTRL2_TYPE;
 375         reg |= MDIO_PCS_CTRL2_10GBR;
 376         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
 377 
 378         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
 379         reg &= ~MDIO_CTRL1_SPEEDSEL;
 380         reg |= MDIO_CTRL1_SPEED10G;
 381         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
 382 
 383         xgbe_phy_pcs_power_cycle(pdata);
 384 
 385         /* Set SerDes to 10G speed */
 386         xgbe_phy_start_ratechange(pdata);
 387 
 388         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_10000_RATE);
 389         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_10000_WORD);
 390         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_10000_PLL);
 391 
 392         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
 393                            phy_data->cdr_rate[XGBE_SPEED_10000]);
 394         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
 395                            phy_data->tx_amp[XGBE_SPEED_10000]);
 396         XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
 397                            phy_data->blwc[XGBE_SPEED_10000]);
 398         XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
 399                            phy_data->pq_skew[XGBE_SPEED_10000]);
 400         XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
 401                            phy_data->dfe_tap_cfg[XGBE_SPEED_10000]);
 402         XRXTX_IOWRITE(pdata, RXTX_REG22,
 403                       phy_data->dfe_tap_ena[XGBE_SPEED_10000]);
 404 
 405         xgbe_phy_complete_ratechange(pdata);
 406 
 407         netif_dbg(pdata, link, pdata->netdev, "10GbE KR mode set\n");
 408 }
 409 
 410 static void xgbe_phy_kx_2500_mode(struct xgbe_prv_data *pdata)
 411 {
 412         struct xgbe_phy_data *phy_data = pdata->phy_data;
 413         unsigned int reg;
 414 
 415         /* Set PCS to KX/1G speed */
 416         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
 417         reg &= ~MDIO_PCS_CTRL2_TYPE;
 418         reg |= MDIO_PCS_CTRL2_10GBX;
 419         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
 420 
 421         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
 422         reg &= ~MDIO_CTRL1_SPEEDSEL;
 423         reg |= MDIO_CTRL1_SPEED1G;
 424         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
 425 
 426         xgbe_phy_pcs_power_cycle(pdata);
 427 
 428         /* Set SerDes to 2.5G speed */
 429         xgbe_phy_start_ratechange(pdata);
 430 
 431         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_2500_RATE);
 432         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_2500_WORD);
 433         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_2500_PLL);
 434 
 435         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
 436                            phy_data->cdr_rate[XGBE_SPEED_2500]);
 437         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
 438                            phy_data->tx_amp[XGBE_SPEED_2500]);
 439         XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
 440                            phy_data->blwc[XGBE_SPEED_2500]);
 441         XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
 442                            phy_data->pq_skew[XGBE_SPEED_2500]);
 443         XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
 444                            phy_data->dfe_tap_cfg[XGBE_SPEED_2500]);
 445         XRXTX_IOWRITE(pdata, RXTX_REG22,
 446                       phy_data->dfe_tap_ena[XGBE_SPEED_2500]);
 447 
 448         xgbe_phy_complete_ratechange(pdata);
 449 
 450         netif_dbg(pdata, link, pdata->netdev, "2.5GbE KX mode set\n");
 451 }
 452 
 453 static void xgbe_phy_kx_1000_mode(struct xgbe_prv_data *pdata)
 454 {
 455         struct xgbe_phy_data *phy_data = pdata->phy_data;
 456         unsigned int reg;
 457 
 458         /* Set PCS to KX/1G speed */
 459         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
 460         reg &= ~MDIO_PCS_CTRL2_TYPE;
 461         reg |= MDIO_PCS_CTRL2_10GBX;
 462         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
 463 
 464         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
 465         reg &= ~MDIO_CTRL1_SPEEDSEL;
 466         reg |= MDIO_CTRL1_SPEED1G;
 467         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
 468 
 469         xgbe_phy_pcs_power_cycle(pdata);
 470 
 471         /* Set SerDes to 1G speed */
 472         xgbe_phy_start_ratechange(pdata);
 473 
 474         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_1000_RATE);
 475         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_1000_WORD);
 476         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_1000_PLL);
 477 
 478         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
 479                            phy_data->cdr_rate[XGBE_SPEED_1000]);
 480         XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
 481                            phy_data->tx_amp[XGBE_SPEED_1000]);
 482         XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
 483                            phy_data->blwc[XGBE_SPEED_1000]);
 484         XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
 485                            phy_data->pq_skew[XGBE_SPEED_1000]);
 486         XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
 487                            phy_data->dfe_tap_cfg[XGBE_SPEED_1000]);
 488         XRXTX_IOWRITE(pdata, RXTX_REG22,
 489                       phy_data->dfe_tap_ena[XGBE_SPEED_1000]);
 490 
 491         xgbe_phy_complete_ratechange(pdata);
 492 
 493         netif_dbg(pdata, link, pdata->netdev, "1GbE KX mode set\n");
 494 }
 495 
 496 static enum xgbe_mode xgbe_phy_cur_mode(struct xgbe_prv_data *pdata)
 497 {
 498         struct xgbe_phy_data *phy_data = pdata->phy_data;
 499         enum xgbe_mode mode;
 500         unsigned int reg;
 501 
 502         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
 503         reg &= MDIO_PCS_CTRL2_TYPE;
 504 
 505         if (reg == MDIO_PCS_CTRL2_10GBR) {
 506                 mode = XGBE_MODE_KR;
 507         } else {
 508                 if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
 509                         mode = XGBE_MODE_KX_2500;
 510                 else
 511                         mode = XGBE_MODE_KX_1000;
 512         }
 513 
 514         return mode;
 515 }
 516 
 517 static enum xgbe_mode xgbe_phy_switch_mode(struct xgbe_prv_data *pdata)
 518 {
 519         struct xgbe_phy_data *phy_data = pdata->phy_data;
 520         enum xgbe_mode mode;
 521 
 522         /* If we are in KR switch to KX, and vice-versa */
 523         if (xgbe_phy_cur_mode(pdata) == XGBE_MODE_KR) {
 524                 if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
 525                         mode = XGBE_MODE_KX_2500;
 526                 else
 527                         mode = XGBE_MODE_KX_1000;
 528         } else {
 529                 mode = XGBE_MODE_KR;
 530         }
 531 
 532         return mode;
 533 }
 534 
 535 static enum xgbe_mode xgbe_phy_get_mode(struct xgbe_prv_data *pdata,
 536                                         int speed)
 537 {
 538         struct xgbe_phy_data *phy_data = pdata->phy_data;
 539 
 540         switch (speed) {
 541         case SPEED_1000:
 542                 return (phy_data->speed_set == XGBE_SPEEDSET_1000_10000)
 543                         ? XGBE_MODE_KX_1000 : XGBE_MODE_UNKNOWN;
 544         case SPEED_2500:
 545                 return (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
 546                         ? XGBE_MODE_KX_2500 : XGBE_MODE_UNKNOWN;
 547         case SPEED_10000:
 548                 return XGBE_MODE_KR;
 549         default:
 550                 return XGBE_MODE_UNKNOWN;
 551         }
 552 }
 553 
 554 static void xgbe_phy_set_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
 555 {
 556         switch (mode) {
 557         case XGBE_MODE_KX_1000:
 558                 xgbe_phy_kx_1000_mode(pdata);
 559                 break;
 560         case XGBE_MODE_KX_2500:
 561                 xgbe_phy_kx_2500_mode(pdata);
 562                 break;
 563         case XGBE_MODE_KR:
 564                 xgbe_phy_kr_mode(pdata);
 565                 break;
 566         default:
 567                 break;
 568         }
 569 }
 570 
 571 static bool xgbe_phy_check_mode(struct xgbe_prv_data *pdata,
 572                                 enum xgbe_mode mode, bool advert)
 573 {
 574         if (pdata->phy.autoneg == AUTONEG_ENABLE) {
 575                 return advert;
 576         } else {
 577                 enum xgbe_mode cur_mode;
 578 
 579                 cur_mode = xgbe_phy_get_mode(pdata, pdata->phy.speed);
 580                 if (cur_mode == mode)
 581                         return true;
 582         }
 583 
 584         return false;
 585 }
 586 
 587 static bool xgbe_phy_use_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
 588 {
 589         struct ethtool_link_ksettings *lks = &pdata->phy.lks;
 590 
 591         switch (mode) {
 592         case XGBE_MODE_KX_1000:
 593                 return xgbe_phy_check_mode(pdata, mode,
 594                                            XGBE_ADV(lks, 1000baseKX_Full));
 595         case XGBE_MODE_KX_2500:
 596                 return xgbe_phy_check_mode(pdata, mode,
 597                                            XGBE_ADV(lks, 2500baseX_Full));
 598         case XGBE_MODE_KR:
 599                 return xgbe_phy_check_mode(pdata, mode,
 600                                            XGBE_ADV(lks, 10000baseKR_Full));
 601         default:
 602                 return false;
 603         }
 604 }
 605 
 606 static bool xgbe_phy_valid_speed(struct xgbe_prv_data *pdata, int speed)
 607 {
 608         struct xgbe_phy_data *phy_data = pdata->phy_data;
 609 
 610         switch (speed) {
 611         case SPEED_1000:
 612                 if (phy_data->speed_set != XGBE_SPEEDSET_1000_10000)
 613                         return false;
 614                 return true;
 615         case SPEED_2500:
 616                 if (phy_data->speed_set != XGBE_SPEEDSET_2500_10000)
 617                         return false;
 618                 return true;
 619         case SPEED_10000:
 620                 return true;
 621         default:
 622                 return false;
 623         }
 624 }
 625 
 626 static int xgbe_phy_link_status(struct xgbe_prv_data *pdata, int *an_restart)
 627 {
 628         unsigned int reg;
 629 
 630         *an_restart = 0;
 631 
 632         /* Link status is latched low, so read once to clear
 633          * and then read again to get current state
 634          */
 635         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1);
 636         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1);
 637 
 638         return (reg & MDIO_STAT1_LSTATUS) ? 1 : 0;
 639 }
 640 
 641 static void xgbe_phy_stop(struct xgbe_prv_data *pdata)
 642 {
 643         /* Nothing uniquely required for stop */
 644 }
 645 
 646 static int xgbe_phy_start(struct xgbe_prv_data *pdata)
 647 {
 648         /* Nothing uniquely required for start */
 649         return 0;
 650 }
 651 
 652 static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
 653 {
 654         unsigned int reg, count;
 655 
 656         /* Perform a software reset of the PCS */
 657         reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
 658         reg |= MDIO_CTRL1_RESET;
 659         XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
 660 
 661         count = 50;
 662         do {
 663                 msleep(20);
 664                 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
 665         } while ((reg & MDIO_CTRL1_RESET) && --count);
 666 
 667         if (reg & MDIO_CTRL1_RESET)
 668                 return -ETIMEDOUT;
 669 
 670         return 0;
 671 }
 672 
 673 static void xgbe_phy_exit(struct xgbe_prv_data *pdata)
 674 {
 675         /* Nothing uniquely required for exit */
 676 }
 677 
 678 static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 679 {
 680         struct ethtool_link_ksettings *lks = &pdata->phy.lks;
 681         struct xgbe_phy_data *phy_data;
 682         int ret;
 683 
 684         phy_data = devm_kzalloc(pdata->dev, sizeof(*phy_data), GFP_KERNEL);
 685         if (!phy_data)
 686                 return -ENOMEM;
 687 
 688         /* Retrieve the PHY speedset */
 689         ret = device_property_read_u32(pdata->phy_dev, XGBE_SPEEDSET_PROPERTY,
 690                                        &phy_data->speed_set);
 691         if (ret) {
 692                 dev_err(pdata->dev, "invalid %s property\n",
 693                         XGBE_SPEEDSET_PROPERTY);
 694                 return ret;
 695         }
 696 
 697         switch (phy_data->speed_set) {
 698         case XGBE_SPEEDSET_1000_10000:
 699         case XGBE_SPEEDSET_2500_10000:
 700                 break;
 701         default:
 702                 dev_err(pdata->dev, "invalid %s property\n",
 703                         XGBE_SPEEDSET_PROPERTY);
 704                 return -EINVAL;
 705         }
 706 
 707         /* Retrieve the PHY configuration properties */
 708         if (device_property_present(pdata->phy_dev, XGBE_BLWC_PROPERTY)) {
 709                 ret = device_property_read_u32_array(pdata->phy_dev,
 710                                                      XGBE_BLWC_PROPERTY,
 711                                                      phy_data->blwc,
 712                                                      XGBE_SPEEDS);
 713                 if (ret) {
 714                         dev_err(pdata->dev, "invalid %s property\n",
 715                                 XGBE_BLWC_PROPERTY);
 716                         return ret;
 717                 }
 718         } else {
 719                 memcpy(phy_data->blwc, xgbe_phy_blwc,
 720                        sizeof(phy_data->blwc));
 721         }
 722 
 723         if (device_property_present(pdata->phy_dev, XGBE_CDR_RATE_PROPERTY)) {
 724                 ret = device_property_read_u32_array(pdata->phy_dev,
 725                                                      XGBE_CDR_RATE_PROPERTY,
 726                                                      phy_data->cdr_rate,
 727                                                      XGBE_SPEEDS);
 728                 if (ret) {
 729                         dev_err(pdata->dev, "invalid %s property\n",
 730                                 XGBE_CDR_RATE_PROPERTY);
 731                         return ret;
 732                 }
 733         } else {
 734                 memcpy(phy_data->cdr_rate, xgbe_phy_cdr_rate,
 735                        sizeof(phy_data->cdr_rate));
 736         }
 737 
 738         if (device_property_present(pdata->phy_dev, XGBE_PQ_SKEW_PROPERTY)) {
 739                 ret = device_property_read_u32_array(pdata->phy_dev,
 740                                                      XGBE_PQ_SKEW_PROPERTY,
 741                                                      phy_data->pq_skew,
 742                                                      XGBE_SPEEDS);
 743                 if (ret) {
 744                         dev_err(pdata->dev, "invalid %s property\n",
 745                                 XGBE_PQ_SKEW_PROPERTY);
 746                         return ret;
 747                 }
 748         } else {
 749                 memcpy(phy_data->pq_skew, xgbe_phy_pq_skew,
 750                        sizeof(phy_data->pq_skew));
 751         }
 752 
 753         if (device_property_present(pdata->phy_dev, XGBE_TX_AMP_PROPERTY)) {
 754                 ret = device_property_read_u32_array(pdata->phy_dev,
 755                                                      XGBE_TX_AMP_PROPERTY,
 756                                                      phy_data->tx_amp,
 757                                                      XGBE_SPEEDS);
 758                 if (ret) {
 759                         dev_err(pdata->dev, "invalid %s property\n",
 760                                 XGBE_TX_AMP_PROPERTY);
 761                         return ret;
 762                 }
 763         } else {
 764                 memcpy(phy_data->tx_amp, xgbe_phy_tx_amp,
 765                        sizeof(phy_data->tx_amp));
 766         }
 767 
 768         if (device_property_present(pdata->phy_dev, XGBE_DFE_CFG_PROPERTY)) {
 769                 ret = device_property_read_u32_array(pdata->phy_dev,
 770                                                      XGBE_DFE_CFG_PROPERTY,
 771                                                      phy_data->dfe_tap_cfg,
 772                                                      XGBE_SPEEDS);
 773                 if (ret) {
 774                         dev_err(pdata->dev, "invalid %s property\n",
 775                                 XGBE_DFE_CFG_PROPERTY);
 776                         return ret;
 777                 }
 778         } else {
 779                 memcpy(phy_data->dfe_tap_cfg, xgbe_phy_dfe_tap_cfg,
 780                        sizeof(phy_data->dfe_tap_cfg));
 781         }
 782 
 783         if (device_property_present(pdata->phy_dev, XGBE_DFE_ENA_PROPERTY)) {
 784                 ret = device_property_read_u32_array(pdata->phy_dev,
 785                                                      XGBE_DFE_ENA_PROPERTY,
 786                                                      phy_data->dfe_tap_ena,
 787                                                      XGBE_SPEEDS);
 788                 if (ret) {
 789                         dev_err(pdata->dev, "invalid %s property\n",
 790                                 XGBE_DFE_ENA_PROPERTY);
 791                         return ret;
 792                 }
 793         } else {
 794                 memcpy(phy_data->dfe_tap_ena, xgbe_phy_dfe_tap_ena,
 795                        sizeof(phy_data->dfe_tap_ena));
 796         }
 797 
 798         /* Initialize supported features */
 799         XGBE_ZERO_SUP(lks);
 800         XGBE_SET_SUP(lks, Autoneg);
 801         XGBE_SET_SUP(lks, Pause);
 802         XGBE_SET_SUP(lks, Asym_Pause);
 803         XGBE_SET_SUP(lks, Backplane);
 804         XGBE_SET_SUP(lks, 10000baseKR_Full);
 805         switch (phy_data->speed_set) {
 806         case XGBE_SPEEDSET_1000_10000:
 807                 XGBE_SET_SUP(lks, 1000baseKX_Full);
 808                 break;
 809         case XGBE_SPEEDSET_2500_10000:
 810                 XGBE_SET_SUP(lks, 2500baseX_Full);
 811                 break;
 812         }
 813 
 814         if (pdata->fec_ability & MDIO_PMA_10GBR_FECABLE_ABLE)
 815                 XGBE_SET_SUP(lks, 10000baseR_FEC);
 816 
 817         pdata->phy_data = phy_data;
 818 
 819         return 0;
 820 }
 821 
 822 void xgbe_init_function_ptrs_phy_v1(struct xgbe_phy_if *phy_if)
 823 {
 824         struct xgbe_phy_impl_if *phy_impl = &phy_if->phy_impl;
 825 
 826         phy_impl->init                  = xgbe_phy_init;
 827         phy_impl->exit                  = xgbe_phy_exit;
 828 
 829         phy_impl->reset                 = xgbe_phy_reset;
 830         phy_impl->start                 = xgbe_phy_start;
 831         phy_impl->stop                  = xgbe_phy_stop;
 832 
 833         phy_impl->link_status           = xgbe_phy_link_status;
 834 
 835         phy_impl->valid_speed           = xgbe_phy_valid_speed;
 836 
 837         phy_impl->use_mode              = xgbe_phy_use_mode;
 838         phy_impl->set_mode              = xgbe_phy_set_mode;
 839         phy_impl->get_mode              = xgbe_phy_get_mode;
 840         phy_impl->switch_mode           = xgbe_phy_switch_mode;
 841         phy_impl->cur_mode              = xgbe_phy_cur_mode;
 842 
 843         phy_impl->an_mode               = xgbe_phy_an_mode;
 844 
 845         phy_impl->an_config             = xgbe_phy_an_config;
 846 
 847         phy_impl->an_advertising        = xgbe_phy_an_advertising;
 848 
 849         phy_impl->an_outcome            = xgbe_phy_an_outcome;
 850 
 851         phy_impl->kr_training_pre       = xgbe_phy_kr_training_pre;
 852         phy_impl->kr_training_post      = xgbe_phy_kr_training_post;
 853 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/ethernet/amd/xgbe/xgbe-phy-v1.c

DEFINITIONS
