[PATCH v2 2/2] ethernet: stmmac: dwmac-rk: Add GMAC support for RK3576

Detlev Casanova
2024-08-08T17:00:37Z

From: David Wu <david.wu@rock-chips.com>

Add constants and callback functions for the dwmac on RK3576 soc.

Signed-off-by: David Wu <david.wu@rock-chips.com>
[rebase, extracted bindings]
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
---
.../net/ethernet/stmicro/stmmac/dwmac-rk.c | 156 ++++++++++++++++++
1 file changed, 156 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index 7ae04d8d291c8..e1fa8fc9f4012 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -1116,6 +1116,161 @@ static const struct rk_gmac_ops rk3568_ops = {
},
};

+/* VCCIO0_1_3_IOC */
+#define RK3576_VCCIO0_1_3_IOC_CON2 0X6408
+#define RK3576_VCCIO0_1_3_IOC_CON3 0X640c
+#define RK3576_VCCIO0_1_3_IOC_CON4 0X6410
+#define RK3576_VCCIO0_1_3_IOC_CON5 0X6414
+
+#define RK3576_GMAC_RXCLK_DLY_ENABLE GRF_BIT(15)
+#define RK3576_GMAC_RXCLK_DLY_DISABLE GRF_CLR_BIT(15)
+#define RK3576_GMAC_TXCLK_DLY_ENABLE GRF_BIT(7)
+#define RK3576_GMAC_TXCLK_DLY_DISABLE GRF_CLR_BIT(7)
+
+#define RK3576_GMAC_CLK_RX_DL_CFG(val) HIWORD_UPDATE(val, 0x7F, 8)
+#define RK3576_GMAC_CLK_TX_DL_CFG(val) HIWORD_UPDATE(val, 0x7F, 0)
+
+/* SDGMAC_GRF */
+#define RK3576_GRF_GMAC_CON0 0X0020
+#define RK3576_GRF_GMAC_CON1 0X0024
+
+#define RK3576_GMAC_RMII_MODE GRF_BIT(3)
+#define RK3576_GMAC_RGMII_MODE GRF_CLR_BIT(3)
+
+#define RK3576_GMAC_CLK_SELET_IO GRF_BIT(7)
+#define RK3576_GMAC_CLK_SELET_CRU GRF_CLR_BIT(7)
+
+#define RK3576_GMAC_CLK_RMII_DIV2 GRF_BIT(5)
+#define RK3576_GMAC_CLK_RMII_DIV20 GRF_CLR_BIT(5)
+
+#define RK3576_GMAC_CLK_RGMII_DIV1 \
+ (GRF_CLR_BIT(6) | GRF_CLR_BIT(5))
+#define RK3576_GMAC_CLK_RGMII_DIV5 \
+ (GRF_BIT(6) | GRF_BIT(5))
+#define RK3576_GMAC_CLK_RGMII_DIV50 \
+ (GRF_BIT(6) | GRF_CLR_BIT(5))
+
+#define RK3576_GMAC_CLK_RMII_GATE GRF_BIT(4)
+#define RK3576_GMAC_CLK_RMII_NOGATE GRF_CLR_BIT(4)
+
+static void rk3576_set_to_rgmii(struct rk_priv_data *bsp_priv,
+ int tx_delay, int rx_delay)
+{
+ struct device *dev = &bsp_priv->pdev->dev;
+ unsigned int offset_con;
+
+ if (IS_ERR(bsp_priv->grf) || IS_ERR(bsp_priv->php_grf)) {
+ dev_err(dev, "Missing rockchip,grf or rockchip,php_grf property\n");
+ return;
+ }
+
+ offset_con = bsp_priv->id == 1 ? RK3576_GRF_GMAC_CON1 :
+ RK3576_GRF_GMAC_CON0;
+
+ regmap_write(bsp_priv->grf, offset_con, RK3576_GMAC_RGMII_MODE);
+
+ offset_con = bsp_priv->id == 1 ? RK3576_VCCIO0_1_3_IOC_CON4 :
+ RK3576_VCCIO0_1_3_IOC_CON2;
+
+ /* m0 && m1 delay enabled */
+ regmap_write(bsp_priv->php_grf, offset_con,
+ DELAY_ENABLE(RK3576, tx_delay, rx_delay));
+ regmap_write(bsp_priv->php_grf, offset_con + 0x4,
+ DELAY_ENABLE(RK3576, tx_delay, rx_delay));
+
+ /* m0 && m1 delay value */
+ regmap_write(bsp_priv->php_grf, offset_con,
+ RK3576_GMAC_CLK_TX_DL_CFG(tx_delay) |
+ RK3576_GMAC_CLK_RX_DL_CFG(rx_delay));
+ regmap_write(bsp_priv->php_grf, offset_con + 0x4,
+ RK3576_GMAC_CLK_TX_DL_CFG(tx_delay) |
+ RK3576_GMAC_CLK_RX_DL_CFG(rx_delay));
+}
+
+static void rk3576_set_to_rmii(struct rk_priv_data *bsp_priv)
+{
+ struct device *dev = &bsp_priv->pdev->dev;
+ unsigned int offset_con;
+
+ if (IS_ERR(bsp_priv->php_grf)) {
+ dev_err(dev, "%s: Missing rockchip,php_grf property\n", __func__);
+ return;
+ }
+
+ offset_con = bsp_priv->id == 1 ? RK3576_GRF_GMAC_CON1 :
+ RK3576_GRF_GMAC_CON0;
+
+ regmap_write(bsp_priv->grf, offset_con, RK3576_GMAC_RMII_MODE);
+}
+
+static void rk3576_set_gmac_speed(struct rk_priv_data *bsp_priv, int speed)
+{
+ struct device *dev = &bsp_priv->pdev->dev;
+ unsigned int val = 0, offset_con;
+
+ switch (speed) {
+ case 10:
+ if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RMII)
+ val = RK3576_GMAC_CLK_RMII_DIV20;
+ else
+ val = RK3576_GMAC_CLK_RGMII_DIV50;
+ break;
+ case 100:
+ if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RMII)
+ val = RK3576_GMAC_CLK_RMII_DIV2;
+ else
+ val = RK3576_GMAC_CLK_RGMII_DIV5;
+ break;
+ case 1000:
+ if (bsp_priv->phy_iface != PHY_INTERFACE_MODE_RMII)
+ val = RK3576_GMAC_CLK_RGMII_DIV1;
+ else
+ goto err;
+ break;
+ default:
+ goto err;
+ }
+
+ offset_con = bsp_priv->id == 1 ? RK3576_GRF_GMAC_CON1 :
+ RK3576_GRF_GMAC_CON0;
+
+ regmap_write(bsp_priv->grf, offset_con, val);
+
+ return;
+err:
+ dev_err(dev, "unknown speed value for GMAC speed=%d", speed);
+}
+
+static void rk3576_set_clock_selection(struct rk_priv_data *bsp_priv, bool input,
+ bool enable)
+{
+ unsigned int val = input ? RK3576_GMAC_CLK_SELET_IO :
+ RK3576_GMAC_CLK_SELET_CRU;
+ unsigned int offset_con;
+
+ val |= enable ? RK3576_GMAC_CLK_RMII_NOGATE :
+ RK3576_GMAC_CLK_RMII_GATE;
+
+ offset_con = bsp_priv->id == 1 ? RK3576_GRF_GMAC_CON1 :
+ RK3576_GRF_GMAC_CON0;
+
+ regmap_write(bsp_priv->grf, offset_con, val);
+}
+
+static const struct rk_gmac_ops rk3576_ops = {
+ .set_to_rgmii = rk3576_set_to_rgmii,
+ .set_to_rmii = rk3576_set_to_rmii,
+ .set_rgmii_speed = rk3576_set_gmac_speed,
+ .set_rmii_speed = rk3576_set_gmac_speed,
+ .set_clock_selection = rk3576_set_clock_selection,
+ .regs_valid = true,
+ .regs = {
+ 0x2a220000, /* gmac0 */
+ 0x2a230000, /* gmac1 */
+ 0x0, /* sentinel */
+ },
+};
+
/* sys_grf */
#define RK3588_GRF_GMAC_CON7 0X031c
#define RK3588_GRF_GMAC_CON8 0X0320
@@ -1908,6 +2063,7 @@ static const struct of_device_id rk_gmac_dwmac_match[] = {
{ .compatible = "rockchip,rk3368-gmac", .data = &rk3368_ops },
{ .compatible = "rockchip,rk3399-gmac", .data = &rk3399_ops },
{ .compatible = "rockchip,rk3568-gmac", .data = &rk3568_ops },
+ { .compatible = "rockchip,rk3576-gmac", .data = &rk3576_ops },
{ .compatible = "rockchip,rk3588-gmac", .data = &rk3588_ops },
{ .compatible = "rockchip,rv1108-gmac", .data = &rv1108_ops },
{ .compatible = "rockchip,rv1126-gmac", .data = &rv1126_ops },
--
2.46.0