Due to the dwmac glue layer register changed, we need to
introduce a new compatible name for the Meson-AXG SoC
to support for the RMII 100M ethernet PHY.
Change since v1 at [1]:
- implement set_phy_mode() for each SoC
[1] https://lkml.kernel.org/r/[email protected]
Yixun Lan (2):
dt-bindings: net: meson-dwmac: new compatible name for AXG SoC
net: stmmac: dwmac-meson: extend phy mode setting
.../devicetree/bindings/net/meson-dwmac.txt | 1 +
.../ethernet/stmicro/stmmac/dwmac-meson8b.c | 120 +++++++++++++++---
2 files changed, 105 insertions(+), 16 deletions(-)
--
2.17.0
We need to introduce a new compatible name for the Meson-AXG SoC
in order to support the RMII 100M ethernet PHY, since the PRG_ETH0
register of the dwmac glue layer is changed from previous old SoC.
Signed-off-by: Yixun Lan <[email protected]>
---
Documentation/devicetree/bindings/net/meson-dwmac.txt | 1 +
1 file changed, 1 insertion(+)
diff --git a/Documentation/devicetree/bindings/net/meson-dwmac.txt b/Documentation/devicetree/bindings/net/meson-dwmac.txt
index 61cada22ae6c..1321bb194ed9 100644
--- a/Documentation/devicetree/bindings/net/meson-dwmac.txt
+++ b/Documentation/devicetree/bindings/net/meson-dwmac.txt
@@ -11,6 +11,7 @@ Required properties on all platforms:
- "amlogic,meson8b-dwmac"
- "amlogic,meson8m2-dwmac"
- "amlogic,meson-gxbb-dwmac"
+ - "amlogic,meson-axg-dwmac"
Additionally "snps,dwmac" and any applicable more
detailed version number described in net/stmmac.txt
should be used.
--
2.17.0
In the Meson-AXG SoC, the phy mode setting of PRG_ETH0 in the glue layer
is extended from bit[0] to bit[2:0].
There is no problem if we configure it to the RGMII 1000M PHY mode,
since the register setting is coincidentally compatible with previous one,
but for the RMII 100M PHY mode, the configuration need to be changed to
value - b100.
This patch was verified with a RTL8201F 100M ethernet PHY.
Signed-off-by: Yixun Lan <[email protected]>
---
.../ethernet/stmicro/stmmac/dwmac-meson8b.c | 120 +++++++++++++++---
1 file changed, 104 insertions(+), 16 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
index 7cb794094a70..4ff231df7322 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
@@ -18,6 +18,7 @@
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/module.h>
+#include <linux/of_device.h>
#include <linux/of_net.h>
#include <linux/mfd/syscon.h>
#include <linux/platform_device.h>
@@ -29,6 +30,10 @@
#define PRG_ETH0_RGMII_MODE BIT(0)
+#define PRG_ETH0_EXT_PHY_MODE_MASK GENMASK(2, 0)
+#define PRG_ETH0_EXT_RGMII_MODE 1
+#define PRG_ETH0_EXT_RMII_MODE 4
+
/* mux to choose between fclk_div2 (bit unset) and mpll2 (bit set) */
#define PRG_ETH0_CLK_M250_SEL_SHIFT 4
#define PRG_ETH0_CLK_M250_SEL_MASK GENMASK(4, 4)
@@ -47,12 +52,20 @@
#define MUX_CLK_NUM_PARENTS 2
+struct meson8b_dwmac;
+
+struct meson8b_dwmac_data {
+ int (*set_phy_mode)(struct meson8b_dwmac *dwmac);
+};
+
struct meson8b_dwmac {
- struct device *dev;
- void __iomem *regs;
- phy_interface_t phy_mode;
- struct clk *rgmii_tx_clk;
- u32 tx_delay_ns;
+ struct device *dev;
+ void __iomem *regs;
+
+ const struct meson8b_dwmac_data *data;
+ phy_interface_t phy_mode;
+ struct clk *rgmii_tx_clk;
+ u32 tx_delay_ns;
};
struct meson8b_dwmac_clk_configs {
@@ -171,6 +184,59 @@ static int meson8b_init_rgmii_tx_clk(struct meson8b_dwmac *dwmac)
return 0;
}
+static int meson8b_set_phy_mode(struct meson8b_dwmac *dwmac)
+{
+ switch (dwmac->phy_mode) {
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ /* enable RGMII mode */
+ meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
+ PRG_ETH0_RGMII_MODE,
+ PRG_ETH0_RGMII_MODE);
+ break;
+ case PHY_INTERFACE_MODE_RMII:
+ /* disable RGMII mode -> enables RMII mode */
+ meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
+ PRG_ETH0_RGMII_MODE, 0);
+ break;
+ default:
+ dev_err(dwmac->dev, "fail to set phy-mode %s\n",
+ phy_modes(dwmac->phy_mode));
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int meson_axg_set_phy_mode(struct meson8b_dwmac *dwmac)
+{
+ switch (dwmac->phy_mode) {
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ /* enable RGMII mode */
+ meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
+ PRG_ETH0_EXT_PHY_MODE_MASK,
+ PRG_ETH0_EXT_RGMII_MODE);
+ break;
+ case PHY_INTERFACE_MODE_RMII:
+ /* disable RGMII mode -> enables RMII mode */
+ meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
+ PRG_ETH0_EXT_PHY_MODE_MASK,
+ PRG_ETH0_EXT_RMII_MODE);
+ break;
+ default:
+ dev_err(dwmac->dev, "fail to set phy-mode %s\n",
+ phy_modes(dwmac->phy_mode));
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
{
int ret;
@@ -188,10 +254,6 @@ static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_TXID:
- /* enable RGMII mode */
- meson8b_dwmac_mask_bits(dwmac, PRG_ETH0, PRG_ETH0_RGMII_MODE,
- PRG_ETH0_RGMII_MODE);
-
/* only relevant for RMII mode -> disable in RGMII mode */
meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
PRG_ETH0_INVERTED_RMII_CLK, 0);
@@ -224,10 +286,6 @@ static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
break;
case PHY_INTERFACE_MODE_RMII:
- /* disable RGMII mode -> enables RMII mode */
- meson8b_dwmac_mask_bits(dwmac, PRG_ETH0, PRG_ETH0_RGMII_MODE,
- 0);
-
/* invert internal clk_rmii_i to generate 25/2.5 tx_rx_clk */
meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
PRG_ETH0_INVERTED_RMII_CLK,
@@ -274,6 +332,11 @@ static int meson8b_dwmac_probe(struct platform_device *pdev)
goto err_remove_config_dt;
}
+ dwmac->data = (const struct meson8b_dwmac_data *)
+ of_device_get_match_data(&pdev->dev);
+ if (!dwmac->data)
+ return -EINVAL;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
dwmac->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(dwmac->regs)) {
@@ -298,6 +361,10 @@ static int meson8b_dwmac_probe(struct platform_device *pdev)
if (ret)
goto err_remove_config_dt;
+ ret = dwmac->data->set_phy_mode(dwmac);
+ if (ret)
+ goto err_remove_config_dt;
+
ret = meson8b_init_prg_eth(dwmac);
if (ret)
goto err_remove_config_dt;
@@ -316,10 +383,31 @@ static int meson8b_dwmac_probe(struct platform_device *pdev)
return ret;
}
+static const struct meson8b_dwmac_data meson8b_dwmac_data = {
+ .set_phy_mode = meson8b_set_phy_mode,
+};
+
+static const struct meson8b_dwmac_data meson_axg_dwmac_data = {
+ .set_phy_mode = meson_axg_set_phy_mode,
+};
+
static const struct of_device_id meson8b_dwmac_match[] = {
- { .compatible = "amlogic,meson8b-dwmac" },
- { .compatible = "amlogic,meson8m2-dwmac" },
- { .compatible = "amlogic,meson-gxbb-dwmac" },
+ {
+ .compatible = "amlogic,meson8b-dwmac",
+ .data = &meson8b_dwmac_data,
+ },
+ {
+ .compatible = "amlogic,meson8m2-dwmac",
+ .data = &meson8b_dwmac_data,
+ },
+ {
+ .compatible = "amlogic,meson-gxbb-dwmac",
+ .data = &meson8b_dwmac_data,
+ },
+ {
+ .compatible = "amlogic,meson-axg-dwmac",
+ .data = &meson_axg_dwmac_data,
+ },
{ }
};
MODULE_DEVICE_TABLE(of, meson8b_dwmac_match);
--
2.17.0
On Sat, Apr 28, 2018 at 10:21:10AM +0000, Yixun Lan wrote:
> We need to introduce a new compatible name for the Meson-AXG SoC
> in order to support the RMII 100M ethernet PHY, since the PRG_ETH0
> register of the dwmac glue layer is changed from previous old SoC.
>
> Signed-off-by: Yixun Lan <[email protected]>
> ---
> Documentation/devicetree/bindings/net/meson-dwmac.txt | 1 +
> 1 file changed, 1 insertion(+)
Reviewed-by: Rob Herring <[email protected]>
Hello Yixun,
On Sat, Apr 28, 2018 at 12:21 PM, Yixun Lan <[email protected]> wrote:
> In the Meson-AXG SoC, the phy mode setting of PRG_ETH0 in the glue layer
> is extended from bit[0] to bit[2:0].
> There is no problem if we configure it to the RGMII 1000M PHY mode,
> since the register setting is coincidentally compatible with previous one,
> but for the RMII 100M PHY mode, the configuration need to be changed to
> value - b100.
> This patch was verified with a RTL8201F 100M ethernet PHY.
>
> Signed-off-by: Yixun Lan <[email protected]>
> ---
> .../ethernet/stmicro/stmmac/dwmac-meson8b.c | 120 +++++++++++++++---
> 1 file changed, 104 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
> index 7cb794094a70..4ff231df7322 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
> @@ -18,6 +18,7 @@
> #include <linux/io.h>
> #include <linux/ioport.h>
> #include <linux/module.h>
> +#include <linux/of_device.h>
> #include <linux/of_net.h>
> #include <linux/mfd/syscon.h>
> #include <linux/platform_device.h>
> @@ -29,6 +30,10 @@
>
> #define PRG_ETH0_RGMII_MODE BIT(0)
>
> +#define PRG_ETH0_EXT_PHY_MODE_MASK GENMASK(2, 0)
> +#define PRG_ETH0_EXT_RGMII_MODE 1
> +#define PRG_ETH0_EXT_RMII_MODE 4
> +
> /* mux to choose between fclk_div2 (bit unset) and mpll2 (bit set) */
> #define PRG_ETH0_CLK_M250_SEL_SHIFT 4
> #define PRG_ETH0_CLK_M250_SEL_MASK GENMASK(4, 4)
> @@ -47,12 +52,20 @@
>
> #define MUX_CLK_NUM_PARENTS 2
>
> +struct meson8b_dwmac;
> +
> +struct meson8b_dwmac_data {
> + int (*set_phy_mode)(struct meson8b_dwmac *dwmac);
> +};
> +
> struct meson8b_dwmac {
> - struct device *dev;
> - void __iomem *regs;
> - phy_interface_t phy_mode;
> - struct clk *rgmii_tx_clk;
> - u32 tx_delay_ns;
> + struct device *dev;
> + void __iomem *regs;
> +
> + const struct meson8b_dwmac_data *data;
> + phy_interface_t phy_mode;
> + struct clk *rgmii_tx_clk;
> + u32 tx_delay_ns;
> };
>
> struct meson8b_dwmac_clk_configs {
> @@ -171,6 +184,59 @@ static int meson8b_init_rgmii_tx_clk(struct meson8b_dwmac *dwmac)
> return 0;
> }
>
> +static int meson8b_set_phy_mode(struct meson8b_dwmac *dwmac)
> +{
> + switch (dwmac->phy_mode) {
> + case PHY_INTERFACE_MODE_RGMII:
> + case PHY_INTERFACE_MODE_RGMII_RXID:
> + case PHY_INTERFACE_MODE_RGMII_ID:
> + case PHY_INTERFACE_MODE_RGMII_TXID:
> + /* enable RGMII mode */
> + meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
> + PRG_ETH0_RGMII_MODE,
> + PRG_ETH0_RGMII_MODE);
> + break;
> + case PHY_INTERFACE_MODE_RMII:
> + /* disable RGMII mode -> enables RMII mode */
> + meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
> + PRG_ETH0_RGMII_MODE, 0);
> + break;
> + default:
> + dev_err(dwmac->dev, "fail to set phy-mode %s\n",
> + phy_modes(dwmac->phy_mode));
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int meson_axg_set_phy_mode(struct meson8b_dwmac *dwmac)
> +{
> + switch (dwmac->phy_mode) {
> + case PHY_INTERFACE_MODE_RGMII:
> + case PHY_INTERFACE_MODE_RGMII_RXID:
> + case PHY_INTERFACE_MODE_RGMII_ID:
> + case PHY_INTERFACE_MODE_RGMII_TXID:
> + /* enable RGMII mode */
> + meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
> + PRG_ETH0_EXT_PHY_MODE_MASK,
> + PRG_ETH0_EXT_RGMII_MODE);
> + break;
> + case PHY_INTERFACE_MODE_RMII:
> + /* disable RGMII mode -> enables RMII mode */
if you have to re-send it for whatever reason:
maybe you could remove the comments from meson_axg_set_phy_mode. the
"older" register layout requires un-setting RGMII mode to enable RMII
mode. however, for AXG there seem to be two dedicated values (1 and 4)
for each mode
apart from that:
Acked-by: Martin Blumenstingl <[email protected]>
> + meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
> + PRG_ETH0_EXT_PHY_MODE_MASK,
> + PRG_ETH0_EXT_RMII_MODE);
> + break;
> + default:
> + dev_err(dwmac->dev, "fail to set phy-mode %s\n",
> + phy_modes(dwmac->phy_mode));
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
> {
> int ret;
> @@ -188,10 +254,6 @@ static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
>
> case PHY_INTERFACE_MODE_RGMII_ID:
> case PHY_INTERFACE_MODE_RGMII_TXID:
> - /* enable RGMII mode */
> - meson8b_dwmac_mask_bits(dwmac, PRG_ETH0, PRG_ETH0_RGMII_MODE,
> - PRG_ETH0_RGMII_MODE);
> -
> /* only relevant for RMII mode -> disable in RGMII mode */
> meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
> PRG_ETH0_INVERTED_RMII_CLK, 0);
> @@ -224,10 +286,6 @@ static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
> break;
>
> case PHY_INTERFACE_MODE_RMII:
> - /* disable RGMII mode -> enables RMII mode */
> - meson8b_dwmac_mask_bits(dwmac, PRG_ETH0, PRG_ETH0_RGMII_MODE,
> - 0);
> -
> /* invert internal clk_rmii_i to generate 25/2.5 tx_rx_clk */
> meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
> PRG_ETH0_INVERTED_RMII_CLK,
> @@ -274,6 +332,11 @@ static int meson8b_dwmac_probe(struct platform_device *pdev)
> goto err_remove_config_dt;
> }
>
> + dwmac->data = (const struct meson8b_dwmac_data *)
> + of_device_get_match_data(&pdev->dev);
> + if (!dwmac->data)
> + return -EINVAL;
> +
> res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> dwmac->regs = devm_ioremap_resource(&pdev->dev, res);
> if (IS_ERR(dwmac->regs)) {
> @@ -298,6 +361,10 @@ static int meson8b_dwmac_probe(struct platform_device *pdev)
> if (ret)
> goto err_remove_config_dt;
>
> + ret = dwmac->data->set_phy_mode(dwmac);
> + if (ret)
> + goto err_remove_config_dt;
> +
> ret = meson8b_init_prg_eth(dwmac);
> if (ret)
> goto err_remove_config_dt;
> @@ -316,10 +383,31 @@ static int meson8b_dwmac_probe(struct platform_device *pdev)
> return ret;
> }
>
> +static const struct meson8b_dwmac_data meson8b_dwmac_data = {
> + .set_phy_mode = meson8b_set_phy_mode,
> +};
> +
> +static const struct meson8b_dwmac_data meson_axg_dwmac_data = {
> + .set_phy_mode = meson_axg_set_phy_mode,
> +};
> +
> static const struct of_device_id meson8b_dwmac_match[] = {
> - { .compatible = "amlogic,meson8b-dwmac" },
> - { .compatible = "amlogic,meson8m2-dwmac" },
> - { .compatible = "amlogic,meson-gxbb-dwmac" },
> + {
> + .compatible = "amlogic,meson8b-dwmac",
> + .data = &meson8b_dwmac_data,
> + },
> + {
> + .compatible = "amlogic,meson8m2-dwmac",
> + .data = &meson8b_dwmac_data,
> + },
> + {
> + .compatible = "amlogic,meson-gxbb-dwmac",
> + .data = &meson8b_dwmac_data,
> + },
> + {
> + .compatible = "amlogic,meson-axg-dwmac",
> + .data = &meson_axg_dwmac_data,
> + },
> { }
> };
> MODULE_DEVICE_TABLE(of, meson8b_dwmac_match);
> --
> 2.17.0
>
From: Yixun Lan <[email protected]>
Date: Sat, 28 Apr 2018 10:21:09 +0000
> Due to the dwmac glue layer register changed, we need to
> introduce a new compatible name for the Meson-AXG SoC
> to support for the RMII 100M ethernet PHY.
>
> Change since v1 at [1]:
> - implement set_phy_mode() for each SoC
>
> [1] https://lkml.kernel.org/r/[email protected]
Series applied, thank you.