// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2009-2011 Freescale Semiconductor, Inc.
 */

#include <common.h>
#include <env.h>
#include <time.h>
#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
#include <hwconfig.h>
#endif
#include <asm/fsl_serdes.h>
#include <asm/immap_85xx.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/fsl_law.h>
#include <linux/errno.h>
#include "fsl_corenet_serdes.h"

/*
 * The work-arounds for erratum SERDES8 and SERDES-A001 are linked together.
 * The code is already very complicated as it is, and separating the two
 * completely would just make things worse.  We try to keep them as separate
 * as possible, but for now we require SERDES8 if SERDES_A001 is defined.
 */
#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A001
#ifndef CONFIG_SYS_P4080_ERRATUM_SERDES8
#error "CONFIG_SYS_P4080_ERRATUM_SERDES_A001 requires CONFIG_SYS_P4080_ERRATUM_SERDES8"
#endif
#endif

static u32 serdes_prtcl_map;

#ifdef DEBUG
static const char *serdes_prtcl_str[] = {
        [NONE] = "NA",
        [PCIE1] = "PCIE1",
        [PCIE2] = "PCIE2",
        [PCIE3] = "PCIE3",
        [PCIE4] = "PCIE4",
        [SATA1] = "SATA1",
        [SATA2] = "SATA2",
        [SRIO1] = "SRIO1",
        [SRIO2] = "SRIO2",
        [SGMII_FM1_DTSEC1] = "SGMII_FM1_DTSEC1",
        [SGMII_FM1_DTSEC2] = "SGMII_FM1_DTSEC2",
        [SGMII_FM1_DTSEC3] = "SGMII_FM1_DTSEC3",
        [SGMII_FM1_DTSEC4] = "SGMII_FM1_DTSEC4",
        [SGMII_FM1_DTSEC5] = "SGMII_FM1_DTSEC5",
        [SGMII_FM2_DTSEC1] = "SGMII_FM2_DTSEC1",
        [SGMII_FM2_DTSEC2] = "SGMII_FM2_DTSEC2",
        [SGMII_FM2_DTSEC3] = "SGMII_FM2_DTSEC3",
        [SGMII_FM2_DTSEC4] = "SGMII_FM2_DTSEC4",
        [SGMII_FM2_DTSEC5] = "SGMII_FM2_DTSEC5",
        [XAUI_FM1] = "XAUI_FM1",
        [XAUI_FM2] = "XAUI_FM2",
        [AURORA] = "DEBUG",
};
#endif

static const struct {
        int idx;
        unsigned int lpd; /* RCW lane powerdown bit */
        int bank;
} lanes[SRDS_MAX_LANES] = {
        { 0, 152, FSL_SRDS_BANK_1 },
        { 1, 153, FSL_SRDS_BANK_1 },
        { 2, 154, FSL_SRDS_BANK_1 },
        { 3, 155, FSL_SRDS_BANK_1 },
        { 4, 156, FSL_SRDS_BANK_1 },
        { 5, 157, FSL_SRDS_BANK_1 },
        { 6, 158, FSL_SRDS_BANK_1 },
        { 7, 159, FSL_SRDS_BANK_1 },
        { 8, 160, FSL_SRDS_BANK_1 },
        { 9, 161, FSL_SRDS_BANK_1 },
        { 16, 162, FSL_SRDS_BANK_2 },
        { 17, 163, FSL_SRDS_BANK_2 },
        { 18, 164, FSL_SRDS_BANK_2 },
        { 19, 165, FSL_SRDS_BANK_2 },
#ifdef CONFIG_ARCH_P4080
        { 20, 170, FSL_SRDS_BANK_3 },
        { 21, 171, FSL_SRDS_BANK_3 },
        { 22, 172, FSL_SRDS_BANK_3 },
        { 23, 173, FSL_SRDS_BANK_3 },
#else
        { 20, 166, FSL_SRDS_BANK_3 },
        { 21, 167, FSL_SRDS_BANK_3 },
        { 22, 168, FSL_SRDS_BANK_3 },
        { 23, 169, FSL_SRDS_BANK_3 },
#endif
#if SRDS_MAX_BANK > 3
        { 24, 175, FSL_SRDS_BANK_4 },
        { 25, 176, FSL_SRDS_BANK_4 },
#endif
};

int serdes_get_lane_idx(int lane)
{
        return lanes[lane].idx;
}

int serdes_get_bank_by_lane(int lane)
{
        return lanes[lane].bank;
}

int serdes_lane_enabled(int lane)
{
        ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
        serdes_corenet_t *regs = (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR;

        int bank = lanes[lane].bank;
        int word = lanes[lane].lpd / 32;
        int bit = lanes[lane].lpd % 32;

        if (in_be32(&regs->bank[bank].rstctl) & SRDS_RSTCTL_SDPD)
                return 0;

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
        /*
         * For banks two and three, use the srds_lpd_b[] array instead of the
         * RCW, because this array contains the real values of SRDS_LPD_B2 and
         * SRDS_LPD_B3.
         */
        if (bank > 0)
                return !(srds_lpd_b[bank] & (8 >> (lane - (6 + 4 * bank))));
#endif

        return !(in_be32(&gur->rcwsr[word]) & (0x80000000 >> bit));
}

int is_serdes_configured(enum srds_prtcl device)
{
        ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);

        /* Is serdes enabled at all? */
        if (!(in_be32(&gur->rcwsr[5]) & FSL_CORENET_RCWSR5_SRDS_EN))
                return 0;

        if (!(serdes_prtcl_map & (1 << NONE)))
                fsl_serdes_init();

        return (1 << device) & serdes_prtcl_map;
}

static int __serdes_get_first_lane(uint32_t prtcl, enum srds_prtcl device)
{
        int i;

        for (i = 0; i < SRDS_MAX_LANES; i++) {
                if (serdes_get_prtcl(prtcl, i) == device)
                        return i;
        }

        return -ENODEV;
}

/*
 * Returns the SERDES lane (0..SRDS_MAX_LANES-1) that routes to the given
 * device. This depends on the current SERDES protocol, as defined in the RCW.
 *
 * Returns a negative error code if SERDES is disabled or the given device is
 * not supported in the current SERDES protocol.
 */
int serdes_get_first_lane(enum srds_prtcl device)
{
        u32 prtcl;
        const ccsr_gur_t *gur;

        gur = (typeof(gur))CONFIG_SYS_MPC85xx_GUTS_ADDR;

        /* Is serdes enabled at all? */
        if (unlikely((in_be32(&gur->rcwsr[5]) & 0x2000) == 0))
                return -ENODEV;

        prtcl = (in_be32(&gur->rcwsr[4]) & FSL_CORENET_RCWSR4_SRDS_PRTCL) >> 26;

        return __serdes_get_first_lane(prtcl, device);
}

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9
/*
 * Returns the SERDES bank (1, 2, or 3) that a given device is on for a given
 * SERDES protocol.
 *
 * Returns a negative error code if the given device is not supported for the
 * given SERDES protocol.
 */
static int serdes_get_bank_by_device(uint32_t prtcl, enum srds_prtcl device)
{
        int lane;

        lane = __serdes_get_first_lane(prtcl, device);
        if (unlikely(lane < 0))
                return lane;

        return serdes_get_bank_by_lane(lane);
}

static uint32_t __serdes_get_lane_count(uint32_t prtcl, enum srds_prtcl device,
                                        int first)
{
        int lane;

        for (lane = first; lane < SRDS_MAX_LANES; lane++) {
                if (serdes_get_prtcl(prtcl, lane) != device)
                        break;
        }

        return lane - first;
}

static void __serdes_reset_rx(serdes_corenet_t *regs,
                              uint32_t prtcl,
                              enum srds_prtcl device)
{
        int lane, idx, first, last;

        lane = __serdes_get_first_lane(prtcl, device);
        if (unlikely(lane < 0))
                return;
        first = serdes_get_lane_idx(lane);
        last = first + __serdes_get_lane_count(prtcl, device, lane);

        /*
         * Set BnGCRy0[RRST] = 0 for each lane in the each bank that is
         * selected as XAUI to place the lane into reset.
        */
        for (idx = first; idx < last; idx++)
                clrbits_be32(&regs->lane[idx].gcr0, SRDS_GCR0_RRST);

        /* Wait at least 250 ns */
        udelay(1);

        /*
         * Set BnGCRy0[RRST] = 1 for each lane in the each bank that is
         * selected as XAUI to bring the lane out of reset.
         */
        for (idx = first; idx < last; idx++)
                setbits_be32(&regs->lane[idx].gcr0, SRDS_GCR0_RRST);
}

void serdes_reset_rx(enum srds_prtcl device)
{
        u32 prtcl;
        const ccsr_gur_t *gur;
        serdes_corenet_t *regs;

        if (unlikely(device == NONE))
                return;

        gur = (typeof(gur))CONFIG_SYS_MPC85xx_GUTS_ADDR;

        /* Is serdes enabled at all? */
        if (unlikely((in_be32(&gur->rcwsr[5]) & 0x2000) == 0))
                return;

        regs = (typeof(regs))CONFIG_SYS_FSL_CORENET_SERDES_ADDR;
        prtcl = (in_be32(&gur->rcwsr[4]) & FSL_CORENET_RCWSR4_SRDS_PRTCL) >> 26;

        __serdes_reset_rx(regs, prtcl, device);
}
#endif

#ifndef CONFIG_SYS_DCSRBAR_PHYS
#define CONFIG_SYS_DCSRBAR_PHYS 0x80000000 /* Must be 1GB-aligned for rev1.0 */
#define CONFIG_SYS_DCSRBAR      0x80000000
#define __DCSR_NOT_DEFINED_BY_CONFIG
#endif

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
/*
 * Enable a SERDES bank that was disabled via the RCW
 *
 * We only call this function for SERDES8 and SERDES-A001 in cases we really
 * want to enable the bank, whether we actually want to use the lanes or not,
 * so make sure at least one lane is enabled.  We're only enabling this one
 * lane to satisfy errata requirements that the bank be enabled.
 *
 * We use a local variable instead of srds_lpd_b[] because we want drivers to
 * think that the lanes actually are disabled.
 */
static void enable_bank(ccsr_gur_t *gur, int bank)
{
        u32 rcw5;
        u32 temp_lpd_b = srds_lpd_b[bank];

        /*
         * If we're asked to disable all lanes, just pretend we're doing
         * that.
         */
        if (temp_lpd_b == 0xF)
                temp_lpd_b = 0xE;

        /*
         * Enable the lanes SRDS_LPD_Bn.  The RCW bits are read-only in
         * CCSR, and read/write in DSCR.
         */
        rcw5 = in_be32(gur->rcwsr + 5);
        if (bank == FSL_SRDS_BANK_2) {
                rcw5 &= ~FSL_CORENET_RCWSRn_SRDS_LPD_B2;
                rcw5 |= temp_lpd_b << 26;
        } else if (bank == FSL_SRDS_BANK_3) {
                rcw5 &= ~FSL_CORENET_RCWSRn_SRDS_LPD_B3;
                rcw5 |= temp_lpd_b << 18;
        } else {
                printf("SERDES: enable_bank: bad bank %d\n", bank + 1);
                return;
        }

        /* See similar code in cpu/mpc85xx/cpu_init.c for an explanation
         * of the DCSR mapping.
         */
        {
#ifdef __DCSR_NOT_DEFINED_BY_CONFIG
                struct law_entry law = find_law(CONFIG_SYS_DCSRBAR_PHYS);
                int law_index;
                if (law.index == -1)
                        law_index = set_next_law(CONFIG_SYS_DCSRBAR_PHYS,
                                                 LAW_SIZE_1M, LAW_TRGT_IF_DCSR);
                else
                        set_law(law.index, CONFIG_SYS_DCSRBAR_PHYS, LAW_SIZE_1M,
                                LAW_TRGT_IF_DCSR);
#endif
                u32 *p = (void *)CONFIG_SYS_DCSRBAR + 0x20114;
                out_be32(p, rcw5);
#ifdef __DCSR_NOT_DEFINED_BY_CONFIG
                if (law.index == -1)
                        disable_law(law_index);
                else
                        set_law(law.index, law.addr, law.size, law.trgt_id);
#endif
        }
}

/*
 * To avoid problems with clock jitter, rev 2 p4080 uses the pll from
 * bank 3 to clock banks 2 and 3, as well as a limited selection of
 * protocol configurations.  This requires that banks 2 and 3's lanes be
 * disabled in the RCW, and enabled with some fixup here to re-enable
 * them, and to configure bank 2's clock parameters in bank 3's pll in
 * cases where they differ.
 */
static void p4080_erratum_serdes8(serdes_corenet_t *regs, ccsr_gur_t *gur,
                                  u32 devdisr, u32 devdisr2, int cfg)
{
        int srds_ratio_b2;
        int rfck_sel;

        /*
         * The disabled lanes of bank 2 will cause the associated
         * logic blocks to be disabled in DEVDISR.  We reverse that here.
         *
         * Note that normally it is not permitted to clear DEVDISR bits
         * once the device has been disabled, but the hardware people
         * say that this special case is OK.
         */
        clrbits_be32(&gur->devdisr, devdisr);
        clrbits_be32(&gur->devdisr2, devdisr2);

        /*
         * Some protocols require special handling.  There are a few
         * additional protocol configurations that can be used, which are
         * not listed here.  See app note 4065 for supported protocol
         * configurations.
         */
        switch (cfg) {
        case 0x19:
                /*
                 * Bank 2 has PCIe which wants BWSEL -- tell bank 3's PLL.
                 * SGMII on bank 3 should still be usable.
                 */
                setbits_be32(&regs->bank[FSL_SRDS_BANK_3].pllcr1,
                             SRDS_PLLCR1_PLL_BWSEL);
                break;

        case 0x0f:
        case 0x10:
                /*
                 * Banks 2 (XAUI) and 3 (SGMII) have different clocking
                 * requirements in these configurations.  Bank 3 cannot
                 * be used and should have its lanes (but not the bank
                 * itself) disabled in the RCW.  We set up bank 3's pll
                 * for bank 2's needs here.
                 */
                srds_ratio_b2 = (in_be32(&gur->rcwsr[4]) >> 13) & 7;

                /* Determine refclock from XAUI ratio */
                switch (srds_ratio_b2) {
                case 1: /* 20:1 */
                        rfck_sel = SRDS_PLLCR0_RFCK_SEL_156_25;
                        break;
                case 2: /* 25:1 */
                        rfck_sel = SRDS_PLLCR0_RFCK_SEL_125;
                        break;
                default:
                        printf("SERDES: bad SRDS_RATIO_B2 %d\n",
                               srds_ratio_b2);
                        return;
                }

                clrsetbits_be32(&regs->bank[FSL_SRDS_BANK_3].pllcr0,
                                SRDS_PLLCR0_RFCK_SEL_MASK, rfck_sel);

                clrsetbits_be32(&regs->bank[FSL_SRDS_BANK_3].pllcr0,
                                SRDS_PLLCR0_FRATE_SEL_MASK,
                                SRDS_PLLCR0_FRATE_SEL_6_25);
                break;
        }

        enable_bank(gur, FSL_SRDS_BANK_3);
}
#endif

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A005
/*
 * If PCIe is not selected as a protocol for any lanes driven by a given PLL,
 * that PLL should have SRDSBnPLLCR1[PLLBW_SEL] = 0.
 */
static void p4080_erratum_serdes_a005(serdes_corenet_t *regs, unsigned int cfg)
{
        enum srds_prtcl device;

        switch (cfg) {
        case 0x13:
        case 0x16:
                /*
                 * If SRDS_PRTCL = 0x13 or 0x16, set SRDSB1PLLCR1[PLLBW_SEL]
                 * to 0.
                 */
                clrbits_be32(&regs->bank[FSL_SRDS_BANK_1].pllcr1,
                             SRDS_PLLCR1_PLL_BWSEL);
                break;
        case 0x19:
                /*
                 * If SRDS_PRTCL = 0x19, set SRDSB1PLLCR1[PLLBW_SEL] to 0 and
                 * SRDSB3PLLCR1[PLLBW_SEL] to 1.
                 */
                clrbits_be32(&regs->bank[FSL_SRDS_BANK_1].pllcr1,
                             SRDS_PLLCR1_PLL_BWSEL);
                setbits_be32(&regs->bank[FSL_SRDS_BANK_3].pllcr1,
                             SRDS_PLLCR1_PLL_BWSEL);
                break;
        }

        /*
         * Set SRDSBnPLLCR1[PLLBW_SEL] to 0 for each bank that selects XAUI
         * before XAUI is initialized.
         */
        for (device = XAUI_FM1; device <= XAUI_FM2; device++) {
                if (is_serdes_configured(device)) {
                        int bank = serdes_get_bank_by_device(cfg, device);

                        clrbits_be32(&regs->bank[bank].pllcr1,
                                     SRDS_PLLCR1_PLL_BWSEL);
                }
        }
}
#endif

/*
 * Wait for the RSTDONE bit to get set, or a one-second timeout.
 */
static void wait_for_rstdone(unsigned int bank)
{
        serdes_corenet_t *srds_regs =
                (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR;
        unsigned long long end_tick;
        u32 rstctl;

        /* wait for reset complete or 1-second timeout */
        end_tick = usec2ticks(1000000) + get_ticks();
        do {
                rstctl = in_be32(&srds_regs->bank[bank].rstctl);
                if (rstctl & SRDS_RSTCTL_RSTDONE)
                        break;
        } while (end_tick > get_ticks());

        if (!(rstctl & SRDS_RSTCTL_RSTDONE))
                printf("SERDES: timeout resetting bank %u\n", bank + 1);
}


static void __soc_serdes_init(void)
{
        /* Allow for SoC-specific initialization in <SOC>_serdes.c  */
};
void soc_serdes_init(void) __attribute__((weak, alias("__soc_serdes_init")));

void fsl_serdes_init(void)
{
        ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
        int cfg;
        serdes_corenet_t *srds_regs;
#ifdef CONFIG_ARCH_P5040
        serdes_corenet_t *srds2_regs;
#endif
        int lane, bank, idx;
        int have_bank[SRDS_MAX_BANK] = {};
#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
        u32 serdes8_devdisr = 0;
        u32 serdes8_devdisr2 = 0;
        char srds_lpd_opt[16];
        const char *srds_lpd_arg;
        size_t arglen;
#endif
#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A001
        int need_serdes_a001;   /* true == need work-around for SERDES A001 */
#endif
#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
        char buffer[HWCONFIG_BUFFER_SIZE];
        char *buf = NULL;

        /*
         * Extract hwconfig from environment since we have not properly setup
         * the environment but need it for ddr config params
         */
        if (env_get_f("hwconfig", buffer, sizeof(buffer)) > 0)
                buf = buffer;
#endif
        if (serdes_prtcl_map & (1 << NONE))
                return;

        /* Is serdes enabled at all? */
        if (!(in_be32(&gur->rcwsr[5]) & FSL_CORENET_RCWSR5_SRDS_EN))
                return;

        srds_regs = (void *)(CONFIG_SYS_FSL_CORENET_SERDES_ADDR);
        cfg = (in_be32(&gur->rcwsr[4]) & FSL_CORENET_RCWSR4_SRDS_PRTCL) >> 26;
        debug("Using SERDES configuration 0x%x, lane settings:\n", cfg);

        if (!is_serdes_prtcl_valid(cfg)) {
                printf("SERDES[PRTCL] = 0x%x is not valid\n", cfg);
                return;
        }

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
        /*
         * Display a warning if banks two and three are not disabled in the RCW,
         * since our work-around for SERDES8 depends on these banks being
         * disabled at power-on.
         */
#define B2_B3 (FSL_CORENET_RCWSRn_SRDS_LPD_B2 | FSL_CORENET_RCWSRn_SRDS_LPD_B3)
        if ((in_be32(&gur->rcwsr[5]) & B2_B3) != B2_B3) {
                printf("Warning: SERDES8 requires banks two and "
                       "three to be disabled in the RCW\n");
        }

        /*
         * Store the values of the fsl_srds_lpd_b2 and fsl_srds_lpd_b3
         * hwconfig options into the srds_lpd_b[] array.  See README.p4080ds
         * for a description of these options.
         */
        for (bank = 1; bank < ARRAY_SIZE(srds_lpd_b); bank++) {
                sprintf(srds_lpd_opt, "fsl_srds_lpd_b%u", bank + 1);
                srds_lpd_arg =
                        hwconfig_subarg_f("serdes", srds_lpd_opt, &arglen, buf);
                if (srds_lpd_arg)
                        srds_lpd_b[bank] =
                                simple_strtoul(srds_lpd_arg, NULL, 0) & 0xf;
        }

        if ((cfg == 0xf) || (cfg == 0x10)) {
                /*
                 * For SERDES protocols 0xF and 0x10, force bank 3 to be
                 * disabled, because it is not supported.
                 */
                srds_lpd_b[FSL_SRDS_BANK_3] = 0xF;
        }
#endif

        /* Look for banks with all lanes disabled, and power down the bank. */
        for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
                enum srds_prtcl lane_prtcl = serdes_get_prtcl(cfg, lane);
                if (serdes_lane_enabled(lane)) {
                        have_bank[serdes_get_bank_by_lane(lane)] = 1;
                        serdes_prtcl_map |= (1 << lane_prtcl);
                }
        }

#ifdef CONFIG_ARCH_P5040
        /*
         * Lanes on bank 4 on P5040 are commented-out, but for some SERDES
         * protocols, these lanes are routed to SATA.  We use serdes_prtcl_map
         * to decide whether a protocol is supported on a given lane, so SATA
         * will be identified as not supported, and therefore not initialized.
         * So for protocols which use SATA on bank4, we add SATA support in
         * serdes_prtcl_map.
         */
        switch (cfg) {
        case 0x0:
        case 0x1:
        case 0x2:
        case 0x3:
        case 0x4:
        case 0x5:
        case 0x6:
        case 0x7:
                serdes_prtcl_map |= 1 << SATA1 | 1 << SATA2;
                break;
        default:
                srds2_regs = (void *)CONFIG_SYS_FSL_CORENET_SERDES2_ADDR;

                /* We don't need bank 4, so power it down */
                setbits_be32(&srds2_regs->bank[0].rstctl, SRDS_RSTCTL_SDPD);
        }
#endif

        soc_serdes_init();

        /* Set the first bit to indicate serdes has been initialized */
        serdes_prtcl_map |= (1 << NONE);

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
        /*
         * Bank two uses the clock from bank three, so if bank two is enabled,
         * then bank three must also be enabled.
         */
        if (have_bank[FSL_SRDS_BANK_2])
                have_bank[FSL_SRDS_BANK_3] = 1;
#endif

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A001
        /*
         * The work-aroud for erratum SERDES-A001 is needed only if bank two
         * is disabled and bank three is enabled.  The converse is also true,
         * but SERDES8 ensures that bank 3 is always enabled if bank 2 is
         * enabled, so there's no point in complicating the code to handle
         * that situation.
         */
        need_serdes_a001 =
                !have_bank[FSL_SRDS_BANK_2] && have_bank[FSL_SRDS_BANK_3];
#endif

        /* Power down the banks we're not interested in */
        for (bank = 0; bank < SRDS_MAX_BANK; bank++) {
                if (!have_bank[bank]) {
                        printf("SERDES: bank %d disabled\n", bank + 1);
#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A001
                        /*
                         * Erratum SERDES-A001 says bank two needs to be powered
                         * down after bank three is powered up, so don't power
                         * down bank two here.
                         */
                        if (!need_serdes_a001 || (bank != FSL_SRDS_BANK_2))
                                setbits_be32(&srds_regs->bank[bank].rstctl,
                                             SRDS_RSTCTL_SDPD);
#else
                        setbits_be32(&srds_regs->bank[bank].rstctl,
                                     SRDS_RSTCTL_SDPD);
#endif
                }
        }

#ifdef CONFIG_SYS_FSL_ERRATUM_A004699
        /*
         * To avoid the situation that resulted in the P4080 erratum
         * SERDES-8, a given SerDes bank will use the PLLs from the previous
         * bank if one of the PLL frequencies is a multiple of the other.  For
         * instance, if bank 3 is running at 2.5GHz and bank 2 is at 1.25GHz,
         * then bank 3 will use bank 2's PLL.  P5040 Erratum A-004699 says
         * that, in this situation, lane synchronization is not initiated.  So
         * when we detect a bank with a "borrowed" PLL, we have to manually
         * initiate lane synchronization.
         */
        for (bank = FSL_SRDS_BANK_2; bank <= FSL_SRDS_BANK_3; bank++) {
                /* Determine the first lane for this bank */
                unsigned int lane;

                for (lane = 0; lane < SRDS_MAX_LANES; lane++)
                        if (lanes[lane].bank == bank)
                                break;
                idx = lanes[lane].idx;

                /*
                 * Check if the PLL for the bank is borrowed.  The UOTHL
                 * bit of the first lane will tell us that.
                 */
                if (in_be32(&srds_regs->lane[idx].gcr0) & SRDS_GCR0_UOTHL) {
                        /* Manually start lane synchronization */
                        setbits_be32(&srds_regs->bank[bank].pllcr0,
                                     SRDS_PLLCR0_PVCOCNT_EN);
                }
        }
#endif

#if defined(CONFIG_SYS_P4080_ERRATUM_SERDES8) || defined (CONFIG_SYS_P4080_ERRATUM_SERDES9)
        for (lane = 0; lane < SRDS_MAX_LANES; lane++) {
                enum srds_prtcl lane_prtcl;

                idx = serdes_get_lane_idx(lane);
                lane_prtcl = serdes_get_prtcl(cfg, lane);

#ifdef DEBUG
                switch (lane) {
                case 0:
                        puts("Bank1: ");
                        break;
                case 10:
                        puts("\nBank2: ");
                        break;
                case 14:
                        puts("\nBank3: ");
                        break;
                default:
                        break;
                }

                printf("%s ", serdes_prtcl_str[lane_prtcl]);
#endif

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9
                /*
                 * Set BnTTLCRy0[FLT_SEL] = 011011 and set BnTTLCRy0[31] = 1
                 * for each of the SerDes lanes selected as SGMII, XAUI, SRIO,
                 * or AURORA before the device is initialized.
                 *
                 * Note that this part of the SERDES-9 work-around is
                 * redundant if the work-around for A-4580 has already been
                 * applied via PBI.
                 */
                switch (lane_prtcl) {
                case SGMII_FM1_DTSEC1:
                case SGMII_FM1_DTSEC2:
                case SGMII_FM1_DTSEC3:
                case SGMII_FM1_DTSEC4:
                case SGMII_FM2_DTSEC1:
                case SGMII_FM2_DTSEC2:
                case SGMII_FM2_DTSEC3:
                case SGMII_FM2_DTSEC4:
                case SGMII_FM2_DTSEC5:
                case XAUI_FM1:
                case XAUI_FM2:
                case SRIO1:
                case SRIO2:
                case AURORA:
                        out_be32(&srds_regs->lane[idx].ttlcr0,
                                 SRDS_TTLCR0_FLT_SEL_KFR_26 |
                                 SRDS_TTLCR0_FLT_SEL_KPH_28 |
                                 SRDS_TTLCR0_FLT_SEL_750PPM |
                                 SRDS_TTLCR0_FREQOVD_EN);
                        break;
                default:
                        break;
                }
#endif

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
                switch (lane_prtcl) {
                case PCIE1:
                case PCIE2:
                case PCIE3:
                        serdes8_devdisr |= FSL_CORENET_DEVDISR_PCIE1 >>
                                           (lane_prtcl - PCIE1);
                        break;
                case SRIO1:
                case SRIO2:
                        serdes8_devdisr |= FSL_CORENET_DEVDISR_SRIO1 >>
                                           (lane_prtcl - SRIO1);
                        break;
                case SGMII_FM1_DTSEC1:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM1 |
                                            FSL_CORENET_DEVDISR2_DTSEC1_1;
                        break;
                case SGMII_FM1_DTSEC2:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM1 |
                                            FSL_CORENET_DEVDISR2_DTSEC1_2;
                        break;
                case SGMII_FM1_DTSEC3:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM1 |
                                            FSL_CORENET_DEVDISR2_DTSEC1_3;
                        break;
                case SGMII_FM1_DTSEC4:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM1 |
                                            FSL_CORENET_DEVDISR2_DTSEC1_4;
                        break;
                case SGMII_FM2_DTSEC1:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM2 |
                                            FSL_CORENET_DEVDISR2_DTSEC2_1;
                        break;
                case SGMII_FM2_DTSEC2:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM2 |
                                            FSL_CORENET_DEVDISR2_DTSEC2_2;
                        break;
                case SGMII_FM2_DTSEC3:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM2 |
                                            FSL_CORENET_DEVDISR2_DTSEC2_3;
                        break;
                case SGMII_FM2_DTSEC4:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM2 |
                                            FSL_CORENET_DEVDISR2_DTSEC2_4;
                        break;
                case SGMII_FM2_DTSEC5:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM2 |
                                            FSL_CORENET_DEVDISR2_DTSEC2_5;
                        break;
                case XAUI_FM1:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM1    |
                                            FSL_CORENET_DEVDISR2_10GEC1;
                        break;
                case XAUI_FM2:
                        serdes8_devdisr2 |= FSL_CORENET_DEVDISR2_FM2    |
                                            FSL_CORENET_DEVDISR2_10GEC2;
                        break;
                case AURORA:
                        break;
                default:
                        break;
                }

#endif
        }
#endif

#ifdef DEBUG
        puts("\n");
#endif

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A005
        p4080_erratum_serdes_a005(srds_regs, cfg);
#endif

        for (idx = 0; idx < SRDS_MAX_BANK; idx++) {
                bank = idx;

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
                /*
                 * Change bank init order to 0, 2, 1, so that the third bank's
                 * PLL is established before we start the second bank.  The
                 * second bank uses the third bank's PLL.
                 */

                if (idx == 1)
                        bank = FSL_SRDS_BANK_3;
                else if (idx == 2)
                        bank = FSL_SRDS_BANK_2;
#endif

                /* Skip disabled banks */
                if (!have_bank[bank])
                        continue;

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8
                if (idx == 1) {
                        /*
                         * Re-enable devices on banks two and three that were
                         * disabled by the RCW, and then enable bank three. The
                         * devices need to be enabled before either bank is
                         * powered up.
                         */
                        p4080_erratum_serdes8(srds_regs, gur, serdes8_devdisr,
                                              serdes8_devdisr2, cfg);
                } else if (idx == 2) {
                        /* Enable bank two now that bank three is enabled. */
                        enable_bank(gur, FSL_SRDS_BANK_2);
                }
#endif

                wait_for_rstdone(bank);
        }

#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A001
        if (need_serdes_a001) {
                /* Bank 3 has been enabled, so now we can disable bank 2 */
                setbits_be32(&srds_regs->bank[FSL_SRDS_BANK_2].rstctl,
                             SRDS_RSTCTL_SDPD);
        }
#endif
}

const char *serdes_clock_to_string(u32 clock)
{
        switch (clock) {
        case SRDS_PLLCR0_RFCK_SEL_100:
                return "100";
        case SRDS_PLLCR0_RFCK_SEL_125:
                return "125";
        case SRDS_PLLCR0_RFCK_SEL_156_25:
                return "156.25";
        case SRDS_PLLCR0_RFCK_SEL_161_13:
                return "161.1328123";
        default:
                return "150";
        }
}