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/* 10G controller driver for Samsung SoCs
*
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Siva Reddy Kallam <siva.kallam@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include "sxgbe_common.h"
#include "sxgbe_xpcs.h"
static int sxgbe_xpcs_read(struct net_device *ndev, unsigned int reg)
{
u32 value;
struct sxgbe_priv_data *priv = netdev_priv(ndev);
value = readl(priv->ioaddr + XPCS_OFFSET + reg);
return value;
}
static int sxgbe_xpcs_write(struct net_device *ndev, int reg, int data)
{
struct sxgbe_priv_data *priv = netdev_priv(ndev);
writel(data, priv->ioaddr + XPCS_OFFSET + reg);
return 0;
}
int sxgbe_xpcs_init(struct net_device *ndev)
{
u32 value;
value = sxgbe_xpcs_read(ndev, SR_PCS_MMD_CONTROL1);
/* 10G XAUI mode */
sxgbe_xpcs_write(ndev, SR_PCS_CONTROL2, XPCS_TYPE_SEL_X);
sxgbe_xpcs_write(ndev, VR_PCS_MMD_XAUI_MODE_CONTROL, XPCS_XAUI_MODE);
sxgbe_xpcs_write(ndev, VR_PCS_MMD_XAUI_MODE_CONTROL, value | BIT(13));
sxgbe_xpcs_write(ndev, SR_PCS_MMD_CONTROL1, value | BIT(11));
do {
value = sxgbe_xpcs_read(ndev, VR_PCS_MMD_DIGITAL_STATUS);
} while ((value & XPCS_QSEQ_STATE_MPLLOFF) == XPCS_QSEQ_STATE_STABLE);
value = sxgbe_xpcs_read(ndev, SR_PCS_MMD_CONTROL1);
sxgbe_xpcs_write(ndev, SR_PCS_MMD_CONTROL1, value & ~BIT(11));
do {
value = sxgbe_xpcs_read(ndev, VR_PCS_MMD_DIGITAL_STATUS);
} while ((value & XPCS_QSEQ_STATE_MPLLOFF) != XPCS_QSEQ_STATE_STABLE);
return 0;
}
int sxgbe_xpcs_init_1G(struct net_device *ndev)
{
int value;
/* 10GBASE-X PCS (1G) mode */
sxgbe_xpcs_write(ndev, SR_PCS_CONTROL2, XPCS_TYPE_SEL_X);
sxgbe_xpcs_write(ndev, VR_PCS_MMD_XAUI_MODE_CONTROL, XPCS_XAUI_MODE);
value = sxgbe_xpcs_read(ndev, SR_PCS_MMD_CONTROL1);
sxgbe_xpcs_write(ndev, SR_PCS_MMD_CONTROL1, value & ~BIT(13));
value = sxgbe_xpcs_read(ndev, SR_MII_MMD_CONTROL);
sxgbe_xpcs_write(ndev, SR_MII_MMD_CONTROL, value | BIT(6));
sxgbe_xpcs_write(ndev, SR_MII_MMD_CONTROL, value & ~BIT(13));
value = sxgbe_xpcs_read(ndev, SR_PCS_MMD_CONTROL1);
sxgbe_xpcs_write(ndev, SR_PCS_MMD_CONTROL1, value | BIT(11));
do {
value = sxgbe_xpcs_read(ndev, VR_PCS_MMD_DIGITAL_STATUS);
} while ((value & XPCS_QSEQ_STATE_MPLLOFF) != XPCS_QSEQ_STATE_STABLE);
value = sxgbe_xpcs_read(ndev, SR_PCS_MMD_CONTROL1);
sxgbe_xpcs_write(ndev, SR_PCS_MMD_CONTROL1, value & ~BIT(11));
/* Auto Negotiation cluase 37 enable */
value = sxgbe_xpcs_read(ndev, SR_MII_MMD_CONTROL);
sxgbe_xpcs_write(ndev, SR_MII_MMD_CONTROL, value | BIT(12));
return 0;
}
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