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net: stmmac: dwmac-qcom-ethqos: Adjust rgmii loopback_en per platform

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Not all platforms should have RGMII_CONFIG_LOOPBACK_EN and the result it
about 50% packet loss on incoming messages. So make it possile to
configure this per compatible and enable it for QCS404.

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bjorn Andersson 2022-03-02 16:09:50 +05:30 • committed by David S. Miller
parent d90b312047
commit a7bf6d7c92
1 changed files with 18 additions and 4 deletions
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14
drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
View file

@ -78,6 +78,7 @@ struct ethqos_emac_por {
struct ethqos_emac_driver_data { struct ethqos_emac_driver_data {
const struct ethqos_emac_por *por; const struct ethqos_emac_por *por;
unsigned int num_por; unsigned int num_por;
bool rgmii_config_looback_en;
}; };
struct qcom_ethqos { struct qcom_ethqos {
@ -90,6 +91,7 @@ struct qcom_ethqos {
const struct ethqos_emac_por *por; const struct ethqos_emac_por *por;
unsigned int num_por; unsigned int num_por;
bool rgmii_config_looback_en;
}; };
static int rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset) static int rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset)
@ -181,6 +183,7 @@ static const struct ethqos_emac_por emac_v2_3_0_por[] = {
static const struct ethqos_emac_driver_data emac_v2_3_0_data = { static const struct ethqos_emac_driver_data emac_v2_3_0_data = {
.por = emac_v2_3_0_por, .por = emac_v2_3_0_por,
.num_por = ARRAY_SIZE(emac_v2_3_0_por), .num_por = ARRAY_SIZE(emac_v2_3_0_por),
.rgmii_config_looback_en = true,
}; };
static const struct ethqos_emac_por emac_v2_1_0_por[] = { static const struct ethqos_emac_por emac_v2_1_0_por[] = {
@ -195,6 +198,7 @@ static const struct ethqos_emac_por emac_v2_1_0_por[] = {
static const struct ethqos_emac_driver_data emac_v2_1_0_data = { static const struct ethqos_emac_driver_data emac_v2_1_0_data = {
.por = emac_v2_1_0_por, .por = emac_v2_1_0_por,
.num_por = ARRAY_SIZE(emac_v2_1_0_por), .num_por = ARRAY_SIZE(emac_v2_1_0_por),
.rgmii_config_looback_en = false,
}; };
static int ethqos_dll_configure(struct qcom_ethqos *ethqos) static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
@ -311,8 +315,12 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos)
rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN, rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN,
SDCC_DDR_CONFIG_PRG_DLY_EN, SDCC_DDR_CONFIG_PRG_DLY_EN,
SDCC_HC_REG_DDR_CONFIG); SDCC_HC_REG_DDR_CONFIG);
if (ethqos->rgmii_config_looback_en)
rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN, rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG); RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
else
rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
0, RGMII_IO_MACRO_CONFIG);
break; break;
case SPEED_100: case SPEED_100:
@ -345,8 +353,13 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos)
rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN, rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
SDCC_HC_REG_DDR_CONFIG); SDCC_HC_REG_DDR_CONFIG);
if (ethqos->rgmii_config_looback_en)
rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN, rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG); RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
else
rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
0, RGMII_IO_MACRO_CONFIG);
break; break;
case SPEED_10: case SPEED_10:
@ -518,6 +531,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
data = of_device_get_match_data(&pdev->dev); data = of_device_get_match_data(&pdev->dev);
ethqos->por = data->por; ethqos->por = data->por;
ethqos->num_por = data->num_por; ethqos->num_por = data->num_por;
ethqos->rgmii_config_looback_en = data->rgmii_config_looback_en;
ethqos->rgmii_clk = devm_clk_get(&pdev->dev, "rgmii"); ethqos->rgmii_clk = devm_clk_get(&pdev->dev, "rgmii");
if (IS_ERR(ethqos->rgmii_clk)) { if (IS_ERR(ethqos->rgmii_clk)) {