diff options
author | Girish K S <ks.giri@samsung.com> | 2014-03-25 12:10:57 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2014-03-26 16:49:31 -0400 |
commit | acc18c147b2281ff85f93862eb8c768df1bfb7df (patch) | |
tree | 6af088d7b1f44301d8e865074d0c99c622e04e85 /drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c | |
parent | 1edb9ca69e8a7988900fc0283e10550b5592164d (diff) | |
download | linux-acc18c147b2281ff85f93862eb8c768df1bfb7df.tar.bz2 |
net: sxgbe: add EEE(Energy Efficient Ethernet) for Samsung sxgbe
Added support for the EEE(Energy Efficient Ethernet) in 10G ethernet driver.
Signed-off-by: Girish K S <ks.giri@samsung.com>
Neatening-by: Joe Perches <joe@perches.com>
Signed-off-by: Byungho An <bh74.an@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c')
-rw-r--r-- | drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c | 86 |
1 files changed, 85 insertions, 1 deletions
diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c index 4ad31bbc42c9..01647901f55f 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_core.c @@ -48,11 +48,38 @@ static void sxgbe_core_dump_regs(void __iomem *ioaddr) { } +static int sxgbe_get_lpi_status(void __iomem *ioaddr, const u32 irq_status) +{ + int status = 0; + int lpi_status; + + /* Reading this register shall clear all the LPI status bits */ + lpi_status = readl(ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); + + if (lpi_status & LPI_CTRL_STATUS_TLPIEN) + status |= TX_ENTRY_LPI_MODE; + if (lpi_status & LPI_CTRL_STATUS_TLPIEX) + status |= TX_EXIT_LPI_MODE; + if (lpi_status & LPI_CTRL_STATUS_RLPIEN) + status |= RX_ENTRY_LPI_MODE; + if (lpi_status & LPI_CTRL_STATUS_RLPIEX) + status |= RX_EXIT_LPI_MODE; + + return status; +} + /* Handle extra events on specific interrupts hw dependent */ static int sxgbe_core_host_irq_status(void __iomem *ioaddr, struct sxgbe_extra_stats *x) { - return 0; + int irq_status, status = 0; + + irq_status = readl(ioaddr + SXGBE_CORE_INT_STATUS_REG); + + if (unlikely(irq_status & LPI_INT_STATUS)) + status |= sxgbe_get_lpi_status(ioaddr, irq_status); + + return status; } /* Set power management mode (e.g. magic frame) */ @@ -138,6 +165,59 @@ static void sxgbe_core_set_speed(void __iomem *ioaddr, unsigned char speed) writel(tx_cfg, ioaddr + SXGBE_CORE_TX_CONFIG_REG); } +static void sxgbe_set_eee_mode(void __iomem *ioaddr) +{ + u32 ctrl; + + /* Enable the LPI mode for transmit path with Tx automate bit set. + * When Tx Automate bit is set, MAC internally handles the entry + * to LPI mode after all outstanding and pending packets are + * transmitted. + */ + ctrl = readl(ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); + ctrl |= LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_TXA; + writel(ctrl, ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); +} + +static void sxgbe_reset_eee_mode(void __iomem *ioaddr) +{ + u32 ctrl; + + ctrl = readl(ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); + ctrl &= ~(LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_TXA); + writel(ctrl, ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); +} + +static void sxgbe_set_eee_pls(void __iomem *ioaddr, const int link) +{ + u32 ctrl; + + ctrl = readl(ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); + + /* If the PHY link status is UP then set PLS */ + if (link) + ctrl |= LPI_CTRL_STATUS_PLS; + else + ctrl &= ~LPI_CTRL_STATUS_PLS; + + writel(ctrl, ioaddr + SXGBE_CORE_LPI_CTRL_STATUS); +} + +static void sxgbe_set_eee_timer(void __iomem *ioaddr, + const int ls, const int tw) +{ + int value = ((tw & 0xffff)) | ((ls & 0x7ff) << 16); + + /* Program the timers in the LPI timer control register: + * LS: minimum time (ms) for which the link + * status from PHY should be ok before transmitting + * the LPI pattern. + * TW: minimum time (us) for which the core waits + * after it has stopped transmitting the LPI pattern. + */ + writel(value, ioaddr + SXGBE_CORE_LPI_TIMER_CTRL); +} + const struct sxgbe_core_ops core_ops = { .core_init = sxgbe_core_init, .dump_regs = sxgbe_core_dump_regs, @@ -150,6 +230,10 @@ const struct sxgbe_core_ops core_ops = { .get_controller_version = sxgbe_get_controller_version, .get_hw_feature = sxgbe_get_hw_feature, .set_speed = sxgbe_core_set_speed, + .set_eee_mode = sxgbe_set_eee_mode, + .reset_eee_mode = sxgbe_reset_eee_mode, + .set_eee_timer = sxgbe_set_eee_timer, + .set_eee_pls = sxgbe_set_eee_pls, }; const struct sxgbe_core_ops *sxgbe_get_core_ops(void) |