Re: [PATCH 05/11] net: stmmac: dwmac-rk: Add internal phy support
From: David.Wu
Date: Tue Jun 27 2017 - 10:22:18 EST
Hi Florian,
Sorry for reply late.
å 2017/6/24 0:22, Florian Fainelli åé:
On 06/22/2017 09:59 PM, David Wu wrote:
To make internal phy worked, need to configure the phy_clock,
phy cru_reset and related registers.
Change-Id: I6971c0a769754b824b1b908b56080cbaf7867d13
Signed-off-by: David Wu <david.wu@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/net/rockchip-dwmac.txt | 3 +
drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 82 ++++++++++++++++++++++
2 files changed, 85 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/rockchip-dwmac.txt b/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
index 8f42755..0514f69 100644
--- a/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
+++ b/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
@@ -22,6 +22,7 @@ Required properties:
<&cru SCLK_MACREF_OUT> clock gate for RMII reference clock output
<&cru ACLK_GMAC>: AXI clock gate for GMAC
<&cru PCLK_GMAC>: APB clock gate for GMAC
+ <&cru MAC_PHY>: clock for internal macphy
- clock-names: One name for each entry in the clocks property.
- phy-mode: See ethernet.txt file in the same directory.
- pinctrl-names: Names corresponding to the numbered pinctrl states.
@@ -35,6 +36,8 @@ Required properties:
- assigned-clocks: main clock, should be <&cru SCLK_MAC>;
- assigned-clock-parents = parent of main clock.
can be <&ext_gmac> or <&cru SCLK_MAC_PLL>.
+ - phy-type: For internal phy, it must be "internal"; For external phy, no need
+ to configure this.
Use the standard "phy-mode" property. You will see
drivers/net/ethernet/broadcom/genet/ actually define a phy-mode =
"internal" property specifically for that. This should probably be
generalized so it is useful to other drivers a well, I will do just that.
I'm a little confused for the property of phy-mode = "internal".
If the property of phy-mode is configured as "internal" from DT , i
could not get the rmii or rgmii mode for the phy.
I use it to differentiate rmii or rgmii for different configuration.
Optional properties:
- tx_delay: Delay value for TXD timing. Range value is 0~0x7F, 0x30 as default.
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index a8e8fd5..c1a1413 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -41,6 +41,7 @@ struct rk_gmac_ops {
void (*set_to_rmii)(struct rk_priv_data *bsp_priv);
void (*set_rgmii_speed)(struct rk_priv_data *bsp_priv, int speed);
void (*set_rmii_speed)(struct rk_priv_data *bsp_priv, int speed);
+ void (*internal_phy_powerup)(struct rk_priv_data *bsp_priv);
};
struct rk_priv_data {
@@ -52,6 +53,7 @@ struct rk_priv_data {
bool clk_enabled;
bool clock_input;
+ bool internal_phy;
struct clk *clk_mac;
struct clk *gmac_clkin;
@@ -61,6 +63,9 @@ struct rk_priv_data {
struct clk *clk_mac_refout;
struct clk *aclk_mac;
struct clk *pclk_mac;
+ struct clk *clk_macphy;
+
+ struct reset_control *macphy_reset;
int tx_delay;
int rx_delay;
@@ -750,6 +755,48 @@ static void rk3399_set_rmii_speed(struct rk_priv_data *bsp_priv, int speed)
.set_rmii_speed = rk3399_set_rmii_speed,
};
+#define RK_GRF_MACPHY_CON0 0xb00
+#define RK_GRF_MACPHY_CON1 0xb04
+#define RK_GRF_MACPHY_CON2 0xb08
+#define RK_GRF_MACPHY_CON3 0xb0c
+
+#define RK_MACPHY_ENABLE GRF_BIT(0)
+#define RK_MACPHY_DISABLE GRF_CLR_BIT(0)
+#define RK_MACPHY_CFG_CLK_50M GRF_BIT(14)
+#define RK_GMAC2PHY_RMII_MODE (GRF_BIT(6) | GRF_CLR_BIT(7))
+#define RK_GRF_CON2_MACPHY_ID HIWORD_UPDATE(0x1234, 0xffff, 0)
+#define RK_GRF_CON3_MACPHY_ID HIWORD_UPDATE(0x35, 0x3f, 0)
+
+static void rk_gmac_internal_phy_powerup(struct rk_priv_data *priv)
+{
+ if (priv->ops->internal_phy_powerup)
+ priv->ops->internal_phy_powerup(priv);
+
+ regmap_write(priv->grf, RK_GRF_MACPHY_CON0, RK_MACPHY_CFG_CLK_50M);
+ regmap_write(priv->grf, RK_GRF_MACPHY_CON0, RK_GMAC2PHY_RMII_MODE);
+
+ regmap_write(priv->grf, RK_GRF_MACPHY_CON2, RK_GRF_CON2_MACPHY_ID);
+ regmap_write(priv->grf, RK_GRF_MACPHY_CON3, RK_GRF_CON3_MACPHY_ID);
+
+ /* disable macphy, the default value is enabled */
+ regmap_write(priv->grf, RK_GRF_MACPHY_CON0, RK_MACPHY_DISABLE);
+ if (priv->macphy_reset)
+ reset_control_assert(priv->macphy_reset);
+ usleep_range(10, 20);
+ if (priv->macphy_reset)
+ reset_control_deassert(priv->macphy_reset);
+ usleep_range(10, 20);
+ regmap_write(priv->grf, RK_GRF_MACPHY_CON0, RK_MACPHY_ENABLE);
+ msleep(30);
+}
+
+static void rk_gmac_internal_phy_powerdown(struct rk_priv_data *priv)
+{
+ regmap_write(priv->grf, RK_GRF_MACPHY_CON0, RK_MACPHY_DISABLE);
+ if (priv->macphy_reset)
+ reset_control_assert(priv->macphy_reset);
+}
+
static int gmac_clk_init(struct rk_priv_data *bsp_priv)
{
struct device *dev = &bsp_priv->pdev->dev;
@@ -803,6 +850,14 @@ static int gmac_clk_init(struct rk_priv_data *bsp_priv)
clk_set_rate(bsp_priv->clk_mac, 50000000);
}
+ if (bsp_priv->internal_phy) {
+ bsp_priv->clk_macphy = devm_clk_get(dev, "clk_macphy");
+ if (IS_ERR(bsp_priv->clk_macphy))
+ dev_err(dev, "cannot get %s clock\n", "clk_macphy");
+ else
+ clk_set_rate(bsp_priv->clk_macphy, 50000000);
+ }
+
return 0;
}
@@ -826,6 +881,9 @@ static int gmac_clk_enable(struct rk_priv_data *bsp_priv, bool enable)
bsp_priv->clk_mac_refout);
}
+ if (!IS_ERR(bsp_priv->clk_macphy))
+ clk_prepare_enable(bsp_priv->clk_macphy);
+
if (!IS_ERR(bsp_priv->aclk_mac))
clk_prepare_enable(bsp_priv->aclk_mac);
@@ -858,6 +916,9 @@ static int gmac_clk_enable(struct rk_priv_data *bsp_priv, bool enable)
bsp_priv->clk_mac_refout);
}
+ if (!IS_ERR(bsp_priv->clk_macphy))
+ clk_disable_unprepare(bsp_priv->clk_macphy);
+
if (!IS_ERR(bsp_priv->aclk_mac))
clk_disable_unprepare(bsp_priv->aclk_mac);
@@ -940,6 +1001,21 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
bsp_priv->clock_input = false;
}
+ ret = of_property_read_string(dev->of_node, "phy-type", &strings);
+ if (!ret && !strcmp(strings, "internal")) {
+ bsp_priv->internal_phy = true;
+ bsp_priv->macphy_reset = devm_reset_control_get(dev,
+ "mac-phy");
+ if (IS_ERR(bsp_priv->macphy_reset)) {
+ dev_info(dev, "no macphy_reset control found\n");
+ bsp_priv->macphy_reset = NULL;
+ }
+ } else {
+ bsp_priv->internal_phy = false;
+ }
+ dev_info(dev, "internal PHY? (%s).\n",
+ bsp_priv->internal_phy ? "yes" : "no");
+
ret = of_property_read_u32(dev->of_node, "tx_delay", &value);
if (ret) {
bsp_priv->tx_delay = 0x30;
@@ -1014,6 +1090,9 @@ static int rk_gmac_powerup(struct rk_priv_data *bsp_priv)
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
+ if (bsp_priv->internal_phy)
+ rk_gmac_internal_phy_powerup(bsp_priv);
+
return 0;
}
@@ -1021,6 +1100,9 @@ static void rk_gmac_powerdown(struct rk_priv_data *gmac)
{
struct device *dev = &gmac->pdev->dev;
+ if (gmac->internal_phy)
+ rk_gmac_internal_phy_powerdown(gmac);
+
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);