/**************************************************************************

Copyright (c) 2007, Chelsio Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

2. Neither the name of the Chelsio Corporation nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

***************************************************************************/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cxgb_ael1002.c,v 1.1 2010/03/21 21:11:13 jklos Exp $");

#ifdef CONFIG_DEFINED
#include <cxgb_include.h>
#else
#include <dev/pci/cxgb/cxgb_include.h>
#endif

enum {
   AEL100X_TX_DISABLE  = 9,
   AEL100X_TX_CONFIG1  = 0xc002,
   AEL1002_PWR_DOWN_HI = 0xc011,
   AEL1002_PWR_DOWN_LO = 0xc012,
   AEL1002_XFI_EQL     = 0xc015,
   AEL1002_LB_EN       = 0xc017,

   LASI_CTRL   = 0x9002,
   LASI_STAT   = 0x9005
};

static void ael100x_txon(struct cphy *phy)
{
   int tx_on_gpio = phy->addr == 0 ? F_GPIO7_OUT_VAL : F_GPIO2_OUT_VAL;

   t3_os_sleep(100);
   t3_set_reg_field(phy->adapter, A_T3DBG_GPIO_EN, 0, tx_on_gpio);
   t3_os_sleep(30);
}

static int ael1002_power_down(struct cphy *phy, int enable)
{
   int err;

   err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL100X_TX_DISABLE, !!enable);
   if (!err)
       err = t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR,
                     BMCR_PDOWN, enable ? BMCR_PDOWN : 0);
   return err;
}

static int ael1002_reset(struct cphy *phy, int wait)
{
   int err;

   if ((err = ael1002_power_down(phy, 0)) ||
       (err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL100X_TX_CONFIG1, 1)) ||
       (err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL1002_PWR_DOWN_HI, 0)) ||
       (err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL1002_PWR_DOWN_LO, 0)) ||
       (err = mdio_write(phy, MDIO_DEV_PMA_PMD, AEL1002_XFI_EQL, 0x18)) ||
       (err = t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, AEL1002_LB_EN,
                      0, 1 << 5)))
       return err;
   return 0;
}

static int ael1002_intr_noop(struct cphy *phy)
{
   return 0;
}

static int ael100x_get_link_status(struct cphy *phy, int *link_ok,
                  int *speed, int *duplex, int *fc)
{
   if (link_ok) {
       unsigned int status;
       int err = mdio_read(phy, MDIO_DEV_PMA_PMD, MII_BMSR, &status);

       /*
        * BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
        * once more to get the current link state.
        */
       if (!err && !(status & BMSR_LSTATUS))
           err = mdio_read(phy, MDIO_DEV_PMA_PMD, MII_BMSR,
                   &status);
       if (err)
           return err;
       *link_ok = !!(status & BMSR_LSTATUS);
   }
   if (speed)
       *speed = SPEED_10000;
   if (duplex)
       *duplex = DUPLEX_FULL;
   return 0;
}

#ifdef C99_NOT_SUPPORTED
static struct cphy_ops ael1002_ops = {
   NULL,
   ael1002_reset,
   ael1002_intr_noop,
   ael1002_intr_noop,
   ael1002_intr_noop,
   ael1002_intr_noop,
   NULL,
   NULL,
   NULL,
   NULL,
   NULL,
   ael100x_get_link_status,
   ael1002_power_down,
};
#else
static struct cphy_ops ael1002_ops = {
   .reset           = ael1002_reset,
   .intr_enable     = ael1002_intr_noop,
   .intr_disable    = ael1002_intr_noop,
   .intr_clear      = ael1002_intr_noop,
   .intr_handler    = ael1002_intr_noop,
   .get_link_status = ael100x_get_link_status,
   .power_down      = ael1002_power_down,
};
#endif

void t3_ael1002_phy_prep(struct cphy *phy, adapter_t *adapter, int phy_addr,
            const struct mdio_ops *mdio_ops)
{
   cphy_init(phy, adapter, phy_addr, &ael1002_ops, mdio_ops);
   ael100x_txon(phy);
}

static int ael1006_reset(struct cphy *phy, int wait)
{
   return t3_phy_reset(phy, MDIO_DEV_PMA_PMD, wait);
}

static int ael1006_intr_enable(struct cphy *phy)
{
   return mdio_write(phy, MDIO_DEV_PMA_PMD, LASI_CTRL, 1);
}

static int ael1006_intr_disable(struct cphy *phy)
{
   return mdio_write(phy, MDIO_DEV_PMA_PMD, LASI_CTRL, 0);
}

static int ael1006_intr_clear(struct cphy *phy)
{
   u32 val;

   return mdio_read(phy, MDIO_DEV_PMA_PMD, LASI_STAT, &val);
}

static int ael1006_intr_handler(struct cphy *phy)
{
   unsigned int status;
   int err = mdio_read(phy, MDIO_DEV_PMA_PMD, LASI_STAT, &status);

   if (err)
       return err;
   return (status & 1) ?  cphy_cause_link_change : 0;
}

static int ael1006_power_down(struct cphy *phy, int enable)
{
   return t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR,
                  BMCR_PDOWN, enable ? BMCR_PDOWN : 0);
}

#ifdef C99_NOT_SUPPORTED
static struct cphy_ops ael1006_ops = {
   NULL,
   ael1006_reset,
   ael1006_intr_enable,
   ael1006_intr_disable,
   ael1006_intr_clear,
   ael1006_intr_handler,
   NULL,
   NULL,
   NULL,
   NULL,
   NULL,
   ael100x_get_link_status,
   ael1006_power_down,
};
#else
static struct cphy_ops ael1006_ops = {
   .reset           = ael1006_reset,
   .intr_enable     = ael1006_intr_enable,
   .intr_disable    = ael1006_intr_disable,
   .intr_clear      = ael1006_intr_clear,
   .intr_handler    = ael1006_intr_handler,
   .get_link_status = ael100x_get_link_status,
   .power_down      = ael1006_power_down,
};
#endif

void t3_ael1006_phy_prep(struct cphy *phy, adapter_t *adapter, int phy_addr,
            const struct mdio_ops *mdio_ops)
{
   cphy_init(phy, adapter, phy_addr, &ael1006_ops, mdio_ops);
   ael100x_txon(phy);
}

#ifdef C99_NOT_SUPPORTED
static struct cphy_ops qt2045_ops = {
   NULL,
   ael1006_reset,
   ael1006_intr_enable,
   ael1006_intr_disable,
   ael1006_intr_clear,
   ael1006_intr_handler,
   NULL,
   NULL,
   NULL,
   NULL,
   NULL,
   ael100x_get_link_status,
   ael1006_power_down,
};
#else
static struct cphy_ops qt2045_ops = {
   .reset           = ael1006_reset,
   .intr_enable     = ael1006_intr_enable,
   .intr_disable    = ael1006_intr_disable,
   .intr_clear      = ael1006_intr_clear,
   .intr_handler    = ael1006_intr_handler,
   .get_link_status = ael100x_get_link_status,
   .power_down      = ael1006_power_down,
};
#endif

void t3_qt2045_phy_prep(struct cphy *phy, adapter_t *adapter, int phy_addr,
           const struct mdio_ops *mdio_ops)
{
   unsigned int stat;

   cphy_init(phy, adapter, phy_addr, &qt2045_ops, mdio_ops);

   /*
    * Some cards where the PHY is supposed to be at address 0 actually
    * have it at 1.
    */
   if (!phy_addr && !mdio_read(phy, MDIO_DEV_PMA_PMD, MII_BMSR, &stat) &&
       stat == 0xffff)
       phy->addr = 1;
}

static int xaui_direct_reset(struct cphy *phy, int wait)
{
   return 0;
}

static int xaui_direct_get_link_status(struct cphy *phy, int *link_ok,
                      int *speed, int *duplex, int *fc)
{
   if (link_ok) {
       unsigned int status;

       status = t3_read_reg(phy->adapter,
                    XGM_REG(A_XGM_SERDES_STAT0, phy->addr)) |
            t3_read_reg(phy->adapter,
                    XGM_REG(A_XGM_SERDES_STAT1, phy->addr)) |
            t3_read_reg(phy->adapter,
                    XGM_REG(A_XGM_SERDES_STAT2, phy->addr)) |
            t3_read_reg(phy->adapter,
                    XGM_REG(A_XGM_SERDES_STAT3, phy->addr));
       *link_ok = !(status & F_LOWSIG0);
   }
   if (speed)
       *speed = SPEED_10000;
   if (duplex)
       *duplex = DUPLEX_FULL;
   return 0;
}

static int xaui_direct_power_down(struct cphy *phy, int enable)
{
   return 0;
}

#ifdef C99_NOT_SUPPORTED
static struct cphy_ops xaui_direct_ops = {
   NULL,
   xaui_direct_reset,
   ael1002_intr_noop,
   ael1002_intr_noop,
   ael1002_intr_noop,
   ael1002_intr_noop,
   NULL,
   NULL,
   NULL,
   NULL,
   NULL,
   xaui_direct_get_link_status,
   xaui_direct_power_down,
};
#else
static struct cphy_ops xaui_direct_ops = {
   .reset           = xaui_direct_reset,
   .intr_enable     = ael1002_intr_noop,
   .intr_disable    = ael1002_intr_noop,
   .intr_clear      = ael1002_intr_noop,
   .intr_handler    = ael1002_intr_noop,
   .get_link_status = xaui_direct_get_link_status,
   .power_down      = xaui_direct_power_down,
};
#endif

void t3_xaui_direct_phy_prep(struct cphy *phy, adapter_t *adapter, int phy_addr,
                const struct mdio_ops *mdio_ops)
{
   cphy_init(phy, adapter, phy_addr, &xaui_direct_ops, mdio_ops);
}

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