redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

stmmac: adding EEE to GMAC4 

This patch adds Energy Efficiency Ethernet to GMAC4.

Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
jpinto 2016-12-29 17:10:27 +00:00 committed by David S. Miller
parent bfd2e4b873
commit afbb167415
2 changed files with 71 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/ethernet/stmicro/stmmac/dwmac4.h
View File

@ -90,6 +90,18 @@ enum power_event {
power_down = 0x00000001,
};
/* Energy Efficient Ethernet (EEE) for GMAC4
*
* LPI status, timer and control register offset
*/
#define GMAC4_LPI_CTRL_STATUS 0xd0
#define GMAC4_LPI_TIMER_CTRL 0xd4
/* LPI control and status defines */
#define GMAC4_LPI_CTRL_STATUS_LPITXA BIT(19) /* Enable LPI TX Automate */
#define GMAC4_LPI_CTRL_STATUS_PLS BIT(17) /* PHY Link Status */
#define GMAC4_LPI_CTRL_STATUS_LPIEN BIT(16) /* LPI Enable */
/* MAC Debug bitmap */
#define GMAC_DEBUG_TFCSTS_MASK GENMASK(18, 17)
#define GMAC_DEBUG_TFCSTS_SHIFT 17

59
drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
View File

@ -137,6 +137,61 @@ static void dwmac4_get_umac_addr(struct mac_device_info *hw,
GMAC_ADDR_LOW(reg_n));
}
static void dwmac4_set_eee_mode(struct mac_device_info *hw)
{
void __iomem *ioaddr = hw->pcsr;
u32 value;
/* Enable the link status receive on RGMII, SGMII ore SMII
* receive path and instruct the transmit to enter in LPI
* state.
*/
value = readl(ioaddr + GMAC4_LPI_CTRL_STATUS);
value |= GMAC4_LPI_CTRL_STATUS_LPIEN | GMAC4_LPI_CTRL_STATUS_LPITXA;
writel(value, ioaddr + GMAC4_LPI_CTRL_STATUS);
}
static void dwmac4_reset_eee_mode(struct mac_device_info *hw)
{
void __iomem *ioaddr = hw->pcsr;
u32 value;
value = readl(ioaddr + GMAC4_LPI_CTRL_STATUS);
value &= ~(GMAC4_LPI_CTRL_STATUS_LPIEN | GMAC4_LPI_CTRL_STATUS_LPITXA);
writel(value, ioaddr + GMAC4_LPI_CTRL_STATUS);
}
static void dwmac4_set_eee_pls(struct mac_device_info *hw, int link)
{
void __iomem *ioaddr = hw->pcsr;
u32 value;
value = readl(ioaddr + GMAC4_LPI_CTRL_STATUS);
if (link)
value |= GMAC4_LPI_CTRL_STATUS_PLS;
else
value &= ~GMAC4_LPI_CTRL_STATUS_PLS;
writel(value, ioaddr + GMAC4_LPI_CTRL_STATUS);
}
static void dwmac4_set_eee_timer(struct mac_device_info *hw, int ls, int tw)
{
void __iomem *ioaddr = hw->pcsr;
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 + GMAC4_LPI_TIMER_CTRL);
}
static void dwmac4_set_filter(struct mac_device_info *hw,
struct net_device *dev)
{
@ -410,6 +465,10 @@ static const struct stmmac_ops dwmac4_ops = {
.pmt = dwmac4_pmt,
.set_umac_addr = dwmac4_set_umac_addr,
.get_umac_addr = dwmac4_get_umac_addr,
.set_eee_mode = dwmac4_set_eee_mode,
.reset_eee_mode = dwmac4_reset_eee_mode,
.set_eee_timer = dwmac4_set_eee_timer,
.set_eee_pls = dwmac4_set_eee_pls,
.pcs_ctrl_ane = dwmac4_ctrl_ane,
.pcs_rane = dwmac4_rane,
.pcs_get_adv_lp = dwmac4_get_adv_lp,