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ramips: mt7620: add rgmii delays support

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At this moment mt7620 ethernet driver doesn't support rgmii delays
configuration. SoC MT7620 have bits 2 and 3 in GPC1 an GPC2 to configure
delays for rx and tx rgmii interface.

This patch adds rx/tx rgmii delay configuration from dts.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
This commit is contained in:
Pawel Dembicki 2020-03-24 06:23:49 +01:00 committed by Daniel Golle
parent aff965a415
commit 5410a8e295
2 changed files with 38 additions and 0 deletions
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4
target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/gsw_mt7620.h
View File

@ -46,6 +46,10 @@
#define GSW_REG_IMR 0x7008 #define GSW_REG_IMR 0x7008
#define GSW_REG_ISR 0x700c #define GSW_REG_ISR 0x700c
#define GSW_REG_GPC1 0x7014 #define GSW_REG_GPC1 0x7014
#define GSW_REG_GPC2 0x701c
#define GSW_REG_GPCx_TXDELAY BIT(3)
#define GSW_REG_GPCx_RXDELAY BIT(2)
#define GSW_REG_MAC_P0_MCR 0x100 #define GSW_REG_MAC_P0_MCR 0x100
#define GSW_REG_MAC_P1_MCR 0x200 #define GSW_REG_MAC_P1_MCR 0x200

34
target/linux/ramips/files-4.14/drivers/net/ethernet/mediatek/soc_mt7620.c
View File

@ -146,6 +146,8 @@ static void mt7620_port_init(struct fe_priv *priv, struct device_node *np)
int phy_mode, size, id; int phy_mode, size, id;
int shift = 12; int shift = 12;
u32 val, mask = 0; u32 val, mask = 0;
u32 val_delay = 0;
u32 mask_delay = GSW_REG_GPCx_TXDELAY | GSW_REG_GPCx_RXDELAY;
int min = (gsw->port4 == PORT4_EPHY) ? (5) : (4); int min = (gsw->port4 == PORT4_EPHY) ? (5) : (4);
if (!_id || (be32_to_cpu(*_id) < min) || (be32_to_cpu(*_id) > 5)) { if (!_id || (be32_to_cpu(*_id) < min) || (be32_to_cpu(*_id) > 5)) {
@ -175,6 +177,25 @@ static void mt7620_port_init(struct fe_priv *priv, struct device_node *np)
switch (phy_mode) { switch (phy_mode) {
case PHY_INTERFACE_MODE_RGMII: case PHY_INTERFACE_MODE_RGMII:
mask = 0; mask = 0;
/* Do not touch rx/tx delay in this state to avoid problems with
* backward compability.
*/
mask_delay = 0;
break;
case PHY_INTERFACE_MODE_RGMII_ID:
mask = 0;
val_delay |= GSW_REG_GPCx_TXDELAY;
val_delay &= ~GSW_REG_GPCx_RXDELAY;
break;
case PHY_INTERFACE_MODE_RGMII_RXID:
mask = 0;
val_delay &= ~GSW_REG_GPCx_TXDELAY;
val_delay &= ~GSW_REG_GPCx_RXDELAY;
break;
case PHY_INTERFACE_MODE_RGMII_TXID:
mask = 0;
val_delay &= ~GSW_REG_GPCx_TXDELAY;
val_delay |= GSW_REG_GPCx_RXDELAY;
break; break;
case PHY_INTERFACE_MODE_MII: case PHY_INTERFACE_MODE_MII:
mask = 1; mask = 1;
@ -196,6 +217,19 @@ static void mt7620_port_init(struct fe_priv *priv, struct device_node *np)
val |= mask << shift; val |= mask << shift;
rt_sysc_w32(val, SYSC_REG_CFG1); rt_sysc_w32(val, SYSC_REG_CFG1);
if (id == 4) {
val = mtk_switch_r32(gsw, GSW_REG_GPC2);
val &= ~(mask_delay);
val |= val_delay & mask_delay;
mtk_switch_w32(gsw, val, GSW_REG_GPC2);
}
else if (id == 5) {
val = mtk_switch_r32(gsw, GSW_REG_GPC1);
val &= ~(mask_delay);
val |= val_delay & mask_delay;
mtk_switch_w32(gsw, val, GSW_REG_GPC1);
}
if (priv->phy->phy_fixed[id]) { if (priv->phy->phy_fixed[id]) {
const __be32 *link = priv->phy->phy_fixed[id]; const __be32 *link = priv->phy->phy_fixed[id];
int tx_fc, rx_fc; int tx_fc, rx_fc;