ethernet: stmmac: dwmac-rk: Add RK3506 GMAC support
From: David Wu <david.wu@...> Date: Mon, 17 Jun 2024 17:46:35 +0800
Commit-Message
Add the needed glue blocks for the RK3506-specific setup. The RK3506 dwmac only supports up to 100MBit with a RMII PHY, but no RGMII. Signed-off-by: David Wu <david.wu@...> Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
.../net/ethernet/stmicro/stmmac/dwmac-rk.c | 64 +++++++++++++++++++ 1 file changed, 64 insertions(+)
Statistics
- 64 lines added
- 0 lines removed
Changes
---------------- drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c ----------------
index 51ea0caf16c1..73330afa4353 100644
@@ -827,6 +827,69 @@ static const struct rk_gmac_ops rk3399_ops = {
.set_speed = rk3399_set_speed,
};
+#define RK3506_GRF_SOC_CON8 0x0020
+#define RK3506_GRF_SOC_CON11 0x002c
+
+#define RK3506_GMAC_RMII_MODE GRF_BIT(1)
+
+#define RK3506_GMAC_CLK_RMII_DIV2 GRF_BIT(3)
+#define RK3506_GMAC_CLK_RMII_DIV20 GRF_CLR_BIT(3)
+
+#define RK3506_GMAC_CLK_SELECT_CRU GRF_CLR_BIT(5)
+#define RK3506_GMAC_CLK_SELECT_IO GRF_BIT(5)
+
+#define RK3506_GMAC_CLK_RMII_GATE GRF_BIT(2)
+#define RK3506_GMAC_CLK_RMII_NOGATE GRF_CLR_BIT(2)
+
+static void rk3506_set_to_rmii(struct rk_priv_data *bsp_priv)
+{
+ unsigned int id = bsp_priv->id, offset;
+
+ offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;
+ regmap_write(bsp_priv->grf, offset, RK3506_GMAC_RMII_MODE);
+}
+
+static const struct rk_reg_speed_data rk3506_reg_speed_data = {
+ .rmii_10 = RK3506_GMAC_CLK_RMII_DIV20,
+ .rmii_100 = RK3506_GMAC_CLK_RMII_DIV2,
+};
+
+static int rk3506_set_speed(struct rk_priv_data *bsp_priv,
+ phy_interface_t interface, int speed)
+{
+ unsigned int id = bsp_priv->id, offset;
+
+ offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;
+ return rk_set_reg_speed(bsp_priv, &rk3506_reg_speed_data,
+ offset, interface, speed);
+}
+
+static void rk3506_set_clock_selection(struct rk_priv_data *bsp_priv,
+ bool input, bool enable)
+{
+ unsigned int value, offset, id = bsp_priv->id;
+
+ offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;
+
+ value = input ? RK3506_GMAC_CLK_SELECT_IO :
+ RK3506_GMAC_CLK_SELECT_CRU;
+ value |= enable ? RK3506_GMAC_CLK_RMII_NOGATE :
+ RK3506_GMAC_CLK_RMII_GATE;
+ regmap_write(bsp_priv->grf, offset, value);
+}
+
+static const struct rk_gmac_ops rk3506_ops = {
+ .set_to_rmii = rk3506_set_to_rmii,
+ .set_speed = rk3506_set_speed,
+ .set_clock_selection = rk3506_set_clock_selection,
+ .regs_valid = true,
+ .regs = {
+ 0xff4c8000, /* gmac0 */
+ 0xff4d0000, /* gmac1 */
+ 0x0, /* sentinel */
+ },
+};
+
#define RK3528_VO_GRF_GMAC_CON 0x0018
#define RK3528_VO_GRF_MACPHY_CON0 0x001c
#define RK3528_VO_GRF_MACPHY_CON1 0x0020
@@ -1808,6 +1871,7 @@ static const struct of_device_id rk_gmac_dwmac_match[] = {
{ .compatible = "rockchip,rk3366-gmac", .data = &rk3366_ops },
{ .compatible = "rockchip,rk3368-gmac", .data = &rk3368_ops },
{ .compatible = "rockchip,rk3399-gmac", .data = &rk3399_ops },
+ { .compatible = "rockchip,rk3506-gmac", .data = &rk3506_ops },
{ .compatible = "rockchip,rk3528-gmac", .data = &rk3528_ops },
{ .compatible = "rockchip,rk3568-gmac", .data = &rk3568_ops },
{ .compatible = "rockchip,rk3576-gmac", .data = &rk3576_ops },