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nvethernet: power ungate and reset support for MGBE

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Change-Id: I5bfddc8e7d7c53bca7d74c800f23e0f592c1e3be
Signed-off-by: Bhadram Varka <vbhadram@nvidia.com>
This commit is contained in:
Bhadram Varka
2020-04-21 14:52:53 +05:30
committed by Revanth Kumar Uppala
parent c2f3c724bd
commit 65801ffa7b
1 changed files with 64 additions and 0 deletions
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64
drivers/net/ethernet/nvidia/nvethernet/ether_linux.c
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@@ -1598,6 +1598,62 @@ static inline void ether_init_eee_params(struct ether_priv_data *pdata)
pdata->tx_lpi_timer = OSI_DEFAULT_TX_LPI_TIMER;
}
static void ether_reset(struct ether_priv_data *pdata)
{
unsigned int val;
void __iomem *addr = devm_ioremap(pdata->dev, 0x21460018, 0x4);
val = readl(addr);
val &= ~BIT(0);
writel(val, addr);
val = readl(addr);
val &= ~BIT(4);
writel(val, addr);
val = readl(addr);
val &= ~BIT(8);
writel(val, addr);
}
static void power_ungate(struct ether_priv_data *pdata)
{
unsigned int val;
void __iomem *pmc_base;
void __iomem *hy_mac_base;
pmc_base = devm_ioremap(pdata->dev, 0xC360000, 0x10000);
hy_mac_base = devm_ioremap(pdata->dev, 0x8608400, 0x20);
val = readl(pmc_base + 0x568);
val &= ~BIT(2);
val &= ~BIT(1);
val &= ~BIT(0);
val |= BIT(8);
val |= BIT(31);
writel(val, pmc_base + 0x568);
do {
val = readl(pmc_base + 0x568);
val = (val & BIT(8));
} while (val);
val = readl(pmc_base + 0x56C);
if (val != 0) {
pr_err("%s(): ERROR - PMC_IMPL_PART_MGBEBA_POWER_GATE_STATUS_0 is not zero\n", __func__);
}
ether_reset(pdata);
writel(0, pmc_base + 0x570);
writel(0, pmc_base + 0x6A4);
do {
val = readl(pmc_base + 0x6A8);
} while (val);
}
/**
* @brief Call back to handle bring up of Ethernet interface
*
@@ -1645,6 +1701,10 @@ static int ether_open(struct net_device *dev)
}
}
if (osi_core->mac == OSI_MAC_HW_MGBE) {
power_ungate(pdata);
}
ret = osi_poll_for_mac_reset_complete(osi_core);
if (ret < 0) {
dev_err(&dev->dev, "failed to poll MAC Software reset\n");
@@ -4466,6 +4526,10 @@ static int ether_probe(struct platform_device *pdev)
goto err_init_res;
}
if (mac == OSI_MAC_HW_MGBE) {
power_ungate(pdata);
}
ret = osi_get_mac_version(osi_core, &osi_core->mac_ver);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get MAC version (%u)\n",