board: stm32mp1: Add board_interface_eth_init

Called to configure Ethernet PHY interface selection and
configure clock selection in RCC Ethernet clock tree.

Signed-off-by: Christophe Roullier <christophe.roullier@st.com>

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 88bc881..7769293 100644 (file)
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -53,9 +53,9 @@
 #define SYSCFG_PMCSETR_ETH_SELMII      BIT(20)
 
 #define SYSCFG_PMCSETR_ETH_SEL_MASK    GENMASK(23, 21)
-#define SYSCFG_PMCSETR_ETH_SEL_GMII_MII        (0 << 21)
-#define SYSCFG_PMCSETR_ETH_SEL_RGMII   (1 << 21)
-#define SYSCFG_PMCSETR_ETH_SEL_RMII    (4 << 21)
+#define SYSCFG_PMCSETR_ETH_SEL_GMII_MII        0
+#define SYSCFG_PMCSETR_ETH_SEL_RGMII   BIT(21)
+#define SYSCFG_PMCSETR_ETH_SEL_RMII    BIT(23)
 
 /*
  * Get a global data pointer
@@ -550,6 +550,68 @@ void board_quiesce_devices(void)
        setup_led(LEDST_OFF);
 }
 
+/* board interface eth init */
+/* this is a weak define that we are overriding */
+int board_interface_eth_init(phy_interface_t interface_type,
+                            bool eth_clk_sel_reg, bool eth_ref_clk_sel_reg)
+{
+       u8 *syscfg;
+       u32 value;
+
+       syscfg = (u8 *)syscon_get_first_range(STM32MP_SYSCON_SYSCFG);
+
+       if (!syscfg)
+               return -ENODEV;
+
+       switch (interface_type) {
+       case PHY_INTERFACE_MODE_MII:
+               value = SYSCFG_PMCSETR_ETH_SEL_GMII_MII |
+                       SYSCFG_PMCSETR_ETH_REF_CLK_SEL;
+               debug("%s: PHY_INTERFACE_MODE_MII\n", __func__);
+               break;
+       case PHY_INTERFACE_MODE_GMII:
+               if (eth_clk_sel_reg)
+                       value = SYSCFG_PMCSETR_ETH_SEL_GMII_MII |
+                               SYSCFG_PMCSETR_ETH_CLK_SEL;
+               else
+                       value = SYSCFG_PMCSETR_ETH_SEL_GMII_MII;
+               debug("%s: PHY_INTERFACE_MODE_GMII\n", __func__);
+               break;
+       case PHY_INTERFACE_MODE_RMII:
+               if (eth_ref_clk_sel_reg)
+                       value = SYSCFG_PMCSETR_ETH_SEL_RMII |
+                               SYSCFG_PMCSETR_ETH_REF_CLK_SEL;
+               else
+                       value = SYSCFG_PMCSETR_ETH_SEL_RMII;
+               debug("%s: PHY_INTERFACE_MODE_RMII\n", __func__);
+               break;
+       case PHY_INTERFACE_MODE_RGMII:
+       case PHY_INTERFACE_MODE_RGMII_ID:
+       case PHY_INTERFACE_MODE_RGMII_RXID:
+       case PHY_INTERFACE_MODE_RGMII_TXID:
+               if (eth_clk_sel_reg)
+                       value = SYSCFG_PMCSETR_ETH_SEL_RGMII |
+                               SYSCFG_PMCSETR_ETH_CLK_SEL;
+               else
+                       value = SYSCFG_PMCSETR_ETH_SEL_RGMII;
+               debug("%s: PHY_INTERFACE_MODE_RGMII\n", __func__);
+               break;
+       default:
+               debug("%s: Do not manage %d interface\n",
+                     __func__, interface_type);
+               /* Do not manage others interfaces */
+               return -EINVAL;
+       }
+
+       /* clear and set ETH configuration bits */
+       writel(SYSCFG_PMCSETR_ETH_SEL_MASK | SYSCFG_PMCSETR_ETH_SELMII |
+              SYSCFG_PMCSETR_ETH_REF_CLK_SEL | SYSCFG_PMCSETR_ETH_CLK_SEL,
+              syscfg + SYSCFG_PMCCLRR);
+       writel(value, syscfg + SYSCFG_PMCSETR);
+
+       return 0;
+}
+
 enum env_location env_get_location(enum env_operation op, int prio)
 {
        u32 bootmode = get_bootmode();