uboot/drivers/net/phy/cortina.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Cortina CS4315/CS4340 10G PHY drivers
   4 *
   5 * Copyright 2014 Freescale Semiconductor, Inc.
   6 * Copyright 2018, 2020 NXP
   7 *
   8 */
   9
  10#include <config.h>
  11#include <common.h>
  12#include <log.h>
  13#include <malloc.h>
  14#include <linux/ctype.h>
  15#include <linux/delay.h>
  16#include <linux/string.h>
  17#include <linux/err.h>
  18#include <phy.h>
  19#include <cortina.h>
  20#ifdef CONFIG_SYS_CORTINA_FW_IN_NAND
  21#include <nand.h>
  22#elif defined(CONFIG_SYS_CORTINA_FW_IN_SPIFLASH)
  23#include <spi_flash.h>
  24#elif defined(CONFIG_SYS_CORTINA_FW_IN_MMC)
  25#include <mmc.h>
  26#endif
  27
  28#ifndef CONFIG_PHYLIB_10G
  29#error The Cortina PHY needs 10G support
  30#endif
  31
  32#ifndef CONFIG_SYS_CORTINA_NO_FW_UPLOAD
  33struct cortina_reg_config cortina_reg_cfg[] = {
  34        /* CS4315_enable_sr_mode */
  35        {VILLA_GLOBAL_MSEQCLKCTRL, 0x8004},
  36        {VILLA_MSEQ_OPTIONS, 0xf},
  37        {VILLA_MSEQ_PC, 0x0},
  38        {VILLA_MSEQ_BANKSELECT,    0x4},
  39        {VILLA_LINE_SDS_COMMON_SRX0_RX_CPA, 0x55},
  40        {VILLA_LINE_SDS_COMMON_SRX0_RX_LOOP_FILTER, 0x30},
  41        {VILLA_DSP_SDS_SERDES_SRX_DFE0_SELECT, 0x1},
  42        {VILLA_DSP_SDS_DSP_COEF_DFE0_SELECT, 0x2},
  43        {VILLA_LINE_SDS_COMMON_SRX0_RX_CPB, 0x2003},
  44        {VILLA_DSP_SDS_SERDES_SRX_FFE_DELAY_CTRL, 0xF047},
  45        {VILLA_MSEQ_ENABLE_MSB, 0x0000},
  46        {VILLA_MSEQ_SPARE21_LSB, 0x6},
  47        {VILLA_MSEQ_RESET_COUNT_LSB, 0x0},
  48        {VILLA_MSEQ_SPARE12_MSB, 0x0000},
  49        /*
  50         * to invert the receiver path, uncomment the next line
  51         * write (VILLA_MSEQ_SPARE12_MSB, 0x4000)
  52         *
  53         * SPARE2_LSB is used to configure the device while in sr mode to
  54         * enable power savings and to use the optical module LOS signal.
  55         * in power savings mode, the internal prbs checker can not be used.
  56         * if the optical module LOS signal is used as an input to the micro
  57         * code, then the micro code will wait until the optical module
  58         * LOS = 0 before turning on the adaptive equalizer.
  59         * Setting SPARE2_LSB bit 0 to 1 places the devie in power savings mode
  60         * while setting bit 0 to 0 disables power savings mode.
  61         * Setting SPARE2_LSB bit 2 to 0 configures the device to use the
  62         * optical module LOS signal while setting bit 2 to 1 configures the
  63         * device so that it will ignore the optical module LOS SPARE2_LSB = 0
  64         */
  65
  66        /* enable power savings, ignore optical module LOS */
  67        {VILLA_MSEQ_SPARE2_LSB, 0x5},
  68
  69        {VILLA_MSEQ_SPARE7_LSB, 0x1e},
  70        {VILLA_MSEQ_BANKSELECT, 0x4},
  71        {VILLA_MSEQ_SPARE9_LSB, 0x2},
  72        {VILLA_MSEQ_SPARE3_LSB, 0x0F53},
  73        {VILLA_MSEQ_SPARE3_MSB, 0x2006},
  74        {VILLA_MSEQ_SPARE8_LSB, 0x3FF7},
  75        {VILLA_MSEQ_SPARE8_MSB, 0x0A46},
  76        {VILLA_MSEQ_COEF8_FFE0_LSB, 0xD500},
  77        {VILLA_MSEQ_COEF8_FFE1_LSB, 0x0200},
  78        {VILLA_MSEQ_COEF8_FFE2_LSB, 0xBA00},
  79        {VILLA_MSEQ_COEF8_FFE3_LSB, 0x0100},
  80        {VILLA_MSEQ_COEF8_FFE4_LSB, 0x0300},
  81        {VILLA_MSEQ_COEF8_FFE5_LSB, 0x0300},
  82        {VILLA_MSEQ_COEF8_DFE0_LSB, 0x0700},
  83        {VILLA_MSEQ_COEF8_DFE0N_LSB, 0x0E00},
  84        {VILLA_MSEQ_COEF8_DFE1_LSB, 0x0B00},
  85        {VILLA_DSP_SDS_DSP_COEF_LARGE_LEAK, 0x2},
  86        {VILLA_DSP_SDS_SERDES_SRX_DAC_ENABLEB_LSB, 0xD000},
  87        {VILLA_MSEQ_POWER_DOWN_LSB, 0xFFFF},
  88        {VILLA_MSEQ_POWER_DOWN_MSB, 0x0},
  89        {VILLA_MSEQ_CAL_RX_SLICER, 0x80},
  90        {VILLA_DSP_SDS_SERDES_SRX_DAC_BIAS_SELECT1_MSB, 0x3f},
  91        {VILLA_GLOBAL_MSEQCLKCTRL, 0x4},
  92        {VILLA_MSEQ_OPTIONS, 0x7},
  93
  94        /* set up min value for ffe1 */
  95        {VILLA_MSEQ_COEF_INIT_SEL, 0x2},
  96        {VILLA_DSP_SDS_DSP_PRECODEDINITFFE21, 0x41},
  97
  98        /* CS4315_sr_rx_pre_eq_set_4in */
  99        {VILLA_GLOBAL_MSEQCLKCTRL, 0x8004},
 100        {VILLA_MSEQ_OPTIONS, 0xf},
 101        {VILLA_MSEQ_BANKSELECT, 0x4},
 102        {VILLA_MSEQ_PC, 0x0},
 103
 104        /* for lengths from 3.5 to 4.5inches */
 105        {VILLA_MSEQ_SERDES_PARAM_LSB, 0x0306},
 106        {VILLA_MSEQ_SPARE25_LSB, 0x0306},
 107        {VILLA_MSEQ_SPARE21_LSB, 0x2},
 108        {VILLA_MSEQ_SPARE23_LSB, 0x2},
 109        {VILLA_MSEQ_CAL_RX_DFE_EQ, 0x0},
 110
 111        {VILLA_GLOBAL_MSEQCLKCTRL, 0x4},
 112        {VILLA_MSEQ_OPTIONS, 0x7},
 113
 114        /* CS4315_rx_drive_4inch */
 115        /* for length  4inches */
 116        {VILLA_GLOBAL_VILLA2_COMPATIBLE, 0x0000},
 117        {VILLA_HOST_SDS_COMMON_STX0_TX_OUTPUT_CTRLA, 0x3023},
 118        {VILLA_LINE_SDS_COMMON_STX0_TX_OUTPUT_CTRLB, 0xc01E},
 119
 120        /* CS4315_tx_drive_4inch */
 121        /* for length  4inches */
 122        {VILLA_GLOBAL_VILLA2_COMPATIBLE, 0x0000},
 123        {VILLA_LINE_SDS_COMMON_STX0_TX_OUTPUT_CTRLA, 0x3023},
 124        {VILLA_LINE_SDS_COMMON_STX0_TX_OUTPUT_CTRLB, 0xc01E},
 125};
 126
 127void cs4340_upload_firmware(struct phy_device *phydev)
 128{
 129        char line_temp[0x50] = {0};
 130        char reg_addr[0x50] = {0};
 131        char reg_data[0x50] = {0};
 132        int i, line_cnt = 0, column_cnt = 0;
 133        struct cortina_reg_config fw_temp;
 134        char *addr = NULL;
 135
 136#if defined(CONFIG_SYS_CORTINA_FW_IN_NOR) || \
 137        defined(CONFIG_SYS_CORTINA_FW_IN_REMOTE)
 138
 139        addr = (char *)CONFIG_CORTINA_FW_ADDR;
 140#elif defined(CONFIG_SYS_CORTINA_FW_IN_NAND)
 141        int ret;
 142        size_t fw_length = CONFIG_CORTINA_FW_LENGTH;
 143
 144        addr = malloc(CONFIG_CORTINA_FW_LENGTH);
 145        ret = nand_read(get_nand_dev_by_index(0),
 146                        (loff_t)CONFIG_CORTINA_FW_ADDR,
 147                        &fw_length, (u_char *)addr);
 148        if (ret == -EUCLEAN) {
 149                printf("NAND read of Cortina firmware at 0x%x failed %d\n",
 150                       CONFIG_CORTINA_FW_ADDR, ret);
 151        }
 152#elif defined(CONFIG_SYS_CORTINA_FW_IN_SPIFLASH)
 153        int ret;
 154        struct spi_flash *ucode_flash;
 155
 156        addr = malloc(CONFIG_CORTINA_FW_LENGTH);
 157        ucode_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
 158                                CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
 159        if (!ucode_flash) {
 160                puts("SF: probe for Cortina ucode failed\n");
 161        } else {
 162                ret = spi_flash_read(ucode_flash, CONFIG_CORTINA_FW_ADDR,
 163                                     CONFIG_CORTINA_FW_LENGTH, addr);
 164                if (ret)
 165                        puts("SF: read for Cortina ucode failed\n");
 166                spi_flash_free(ucode_flash);
 167        }
 168#elif defined(CONFIG_SYS_CORTINA_FW_IN_MMC)
 169        int dev = CONFIG_SYS_MMC_ENV_DEV;
 170        u32 cnt = CONFIG_CORTINA_FW_LENGTH / 512;
 171        u32 blk = CONFIG_CORTINA_FW_ADDR / 512;
 172        struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
 173
 174        if (!mmc) {
 175                puts("Failed to find MMC device for Cortina ucode\n");
 176        } else {
 177                addr = malloc(CONFIG_CORTINA_FW_LENGTH);
 178                printf("MMC read: dev # %u, block # %u, count %u ...\n",
 179                       dev, blk, cnt);
 180                mmc_init(mmc);
 181#ifdef CONFIG_BLK
 182                (void)blk_dread(mmc_get_blk_desc(mmc), blk, cnt,
 183                                                addr);
 184#else
 185                (void)mmc->block_dev.block_read(&mmc->block_dev, blk, cnt,
 186                                                addr);
 187#endif
 188        }
 189#endif
 190
 191        while (*addr != 'Q') {
 192                i = 0;
 193
 194                while (*addr != 0x0a) {
 195                        line_temp[i++] = *addr++;
 196                        if (0x50 < i) {
 197                                printf("Not found Cortina PHY ucode at 0x%p\n",
 198                                       (char *)CONFIG_CORTINA_FW_ADDR);
 199                                return;
 200                        }
 201                }
 202
 203                addr++;  /* skip '\n' */
 204                line_cnt++;
 205                column_cnt = i;
 206                line_temp[column_cnt] = '\0';
 207
 208                if (CONFIG_CORTINA_FW_LENGTH < line_cnt)
 209                        return;
 210
 211                for (i = 0; i < column_cnt; i++) {
 212                        if (isspace(line_temp[i++]))
 213                                break;
 214                }
 215
 216                memcpy(reg_addr, line_temp, i);
 217                memcpy(reg_data, &line_temp[i], column_cnt - i);
 218                strim(reg_addr);
 219                strim(reg_data);
 220                fw_temp.reg_addr = (simple_strtoul(reg_addr, NULL, 0)) & 0xffff;
 221                fw_temp.reg_value = (simple_strtoul(reg_data, NULL, 0)) &
 222                                     0xffff;
 223                phy_write(phydev, 0x00, fw_temp.reg_addr, fw_temp.reg_value);
 224        }
 225}
 226#endif
 227
 228int cs4340_phy_init(struct phy_device *phydev)
 229{
 230#ifndef CONFIG_SYS_CORTINA_NO_FW_UPLOAD
 231        int timeout = 100;  /* 100ms */
 232#endif
 233        int reg_value;
 234
 235        /*
 236         * Cortina phy has provision to store
 237         * phy firmware in attached dedicated EEPROM.
 238         * Boards designed with EEPROM attached to Cortina
 239         * does not require FW upload.
 240         */
 241#ifndef CONFIG_SYS_CORTINA_NO_FW_UPLOAD
 242        /* step1: BIST test */
 243        phy_write(phydev, 0x00, VILLA_GLOBAL_MSEQCLKCTRL,     0x0004);
 244        phy_write(phydev, 0x00, VILLA_GLOBAL_LINE_SOFT_RESET, 0x0000);
 245        phy_write(phydev, 0x00, VILLA_GLOBAL_BIST_CONTROL,    0x0001);
 246        while (--timeout) {
 247                reg_value = phy_read(phydev, 0x00, VILLA_GLOBAL_BIST_STATUS);
 248                if (reg_value & mseq_edc_bist_done) {
 249                        if (0 == (reg_value & mseq_edc_bist_fail))
 250                                break;
 251                }
 252                udelay(1000);
 253        }
 254
 255        if (!timeout) {
 256                printf("%s BIST mseq_edc_bist_done timeout!\n", __func__);
 257                return -1;
 258        }
 259
 260        /* setp2: upload ucode */
 261        cs4340_upload_firmware(phydev);
 262#endif
 263        reg_value = phy_read(phydev, 0x00, VILLA_GLOBAL_DWNLD_CHECKSUM_STATUS);
 264        if (reg_value) {
 265                debug("%s checksum status failed.\n", __func__);
 266                return -1;
 267        }
 268
 269        return 0;
 270}
 271
 272int cs4340_config(struct phy_device *phydev)
 273{
 274        cs4340_phy_init(phydev);
 275        return 0;
 276}
 277
 278int cs4340_probe(struct phy_device *phydev)
 279{
 280        phydev->flags = PHY_FLAG_BROKEN_RESET;
 281        return 0;
 282}
 283
 284int cs4340_startup(struct phy_device *phydev)
 285{
 286        phydev->link = 1;
 287
 288        /* For now just lie and say it's 10G all the time */
 289        phydev->speed = SPEED_10000;
 290        phydev->duplex = DUPLEX_FULL;
 291        return 0;
 292}
 293
 294int cs4223_phy_init(struct phy_device *phydev)
 295{
 296        int reg_value;
 297
 298        reg_value = phy_read(phydev, 0x00, CS4223_EEPROM_STATUS);
 299        if (!(reg_value & CS4223_EEPROM_FIRMWARE_LOADDONE)) {
 300                printf("%s CS4223 Firmware not present in EERPOM\n", __func__);
 301                return -ENOSYS;
 302        }
 303
 304        return 0;
 305}
 306
 307int cs4223_config(struct phy_device *phydev)
 308{
 309        return cs4223_phy_init(phydev);
 310}
 311
 312int cs4223_probe(struct phy_device *phydev)
 313{
 314        phydev->flags = PHY_FLAG_BROKEN_RESET;
 315        return 0;
 316}
 317
 318int cs4223_startup(struct phy_device *phydev)
 319{
 320        phydev->link = 1;
 321        phydev->speed = SPEED_10000;
 322        phydev->duplex = DUPLEX_FULL;
 323        return 0;
 324}
 325
 326struct phy_driver cs4340_driver = {
 327        .name = "Cortina CS4315/CS4340",
 328        .uid = PHY_UID_CS4340,
 329        .mask = 0xfffffff0,
 330        .features = PHY_10G_FEATURES,
 331        .mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
 332                 MDIO_DEVS_PHYXS | MDIO_DEVS_AN |
 333                 MDIO_DEVS_VEND1 | MDIO_DEVS_VEND2),
 334        .config = &cs4340_config,
 335        .probe  = &cs4340_probe,
 336        .startup = &cs4340_startup,
 337        .shutdown = &gen10g_shutdown,
 338};
 339
 340struct phy_driver cs4223_driver = {
 341        .name = "Cortina CS4223",
 342        .uid = PHY_UID_CS4223,
 343        .mask = 0x0ffff00f,
 344        .features = PHY_10G_FEATURES,
 345        .mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
 346                 MDIO_DEVS_AN),
 347        .config = &cs4223_config,
 348        .probe  = &cs4223_probe,
 349        .startup = &cs4223_startup,
 350        .shutdown = &gen10g_shutdown,
 351};
 352
 353int phy_cortina_init(void)
 354{
 355        phy_register(&cs4340_driver);
 356        phy_register(&cs4223_driver);
 357        return 0;
 358}
 359
 360int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 361{
 362        int phy_reg;
 363
 364        /* Cortina PHY has non-standard offset of PHY ID registers */
 365        phy_reg = bus->read(bus, addr, 0, VILLA_GLOBAL_CHIP_ID_LSB);
 366        if (phy_reg < 0)
 367                return -EIO;
 368        *phy_id = (phy_reg & 0xffff) << 16;
 369
 370        phy_reg = bus->read(bus, addr, 0, VILLA_GLOBAL_CHIP_ID_MSB);
 371        if (phy_reg < 0)
 372                return -EIO;
 373        *phy_id |= (phy_reg & 0xffff);
 374
 375        if ((*phy_id == PHY_UID_CS4340) || (*phy_id == PHY_UID_CS4223))
 376                return 0;
 377
 378        /*
 379         * If Cortina PHY not detected,
 380         * try generic way to find PHY ID registers
 381         */
 382        phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
 383        if (phy_reg < 0)
 384                return -EIO;
 385        *phy_id = (phy_reg & 0xffff) << 16;
 386
 387        phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
 388        if (phy_reg < 0)
 389                return -EIO;
 390        *phy_id |= (phy_reg & 0xffff);
 391
 392        return 0;
 393}
 394