Patrick Georgi merged this change.

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src/mb/sifive/hifive-unleashed: initialize Gigabit Ethernet Controller

Initialize the clock of the Gigabit Ethernet Controller.

Change-Id: I172dc518c9b48c122289bba5a65beece925410d4
Signed-off-by: Xiang Wang <wxjstz@126.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31059
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Hug <philipp@hug.cx>
---
M src/soc/sifive/fu540/clock.c
1 file changed, 35 insertions(+), 0 deletions(-)

diff --git a/src/soc/sifive/fu540/clock.c b/src/soc/sifive/fu540/clock.c
index 4b52c56..60a8a13 100644
--- a/src/soc/sifive/fu540/clock.c
+++ b/src/soc/sifive/fu540/clock.c
@@ -59,6 +59,8 @@
 
 #define PRCI_DDRPLLCFG1_MASK (1u << 31)
 
+#define PRCI_GEMGXLPPLCFG1_MASK (1u << 31)
+
 #define PRCI_CORECLKSEL_CORECLKSEL 1
 
 #define PRCI_DEVICESRESET_DDR_CTRL_RST_N(x) (((x) & 0x1)  << 0)
@@ -141,6 +143,15 @@
 	.fse = 1,
 };
 
+static const struct pll_settings gemgxlpll_settings = {
+	.divr = 0,
+	.divf = 59,
+	.divq = 5,
+	.range = 4,
+	.bypass = 0,
+	.fse = 1,
+};
+
 static void init_coreclk(void)
 {
 	// switch coreclk to input reference frequency before modifying PLL
@@ -168,6 +179,19 @@
 	write32(&prci->ddrpllcfg1, cfg1);
 }
 
+static void init_gemgxlclk(void)
+{
+	u32 cfg1 = read32(&prci->gemgxlpllcfg1);
+	clrbits_le32(&cfg1, PRCI_GEMGXLPPLCFG1_MASK);
+	write32(&prci->gemgxlpllcfg1, cfg1);
+
+	configure_pll(&prci->gemgxlpllcfg0, &gemgxlpll_settings);
+
+	setbits_le32(&cfg1, PRCI_GEMGXLPPLCFG1_MASK);
+	write32(&prci->gemgxlpllcfg1, cfg1);
+}
+
+
 #define FU540_UART_DEVICES 2
 #define FU540_UART_REG_DIV 0x18
 #define FU540_UART_DIV_VAL 4
@@ -227,6 +251,17 @@
 	// device?
 	for (int i = 0; i < 256; i++)
 		asm volatile ("nop");
+
+	init_gemgxlclk();
+
+	write32(&prci->devicesresetreg,
+		PRCI_DEVICESRESET_DDR_CTRL_RST_N(1) |
+		PRCI_DEVICESRESET_DDR_AXI_RST_N(1) |
+		PRCI_DEVICESRESET_DDR_AHB_RST_N(1) |
+		PRCI_DEVICESRESET_DDR_PHY_RST_N(1) |
+		PRCI_DEVICESRESET_GEMGXL_RST_N(1));
+
+	asm volatile ("fence");
 }
 #endif /* ENV_ROMSTAGE */
 

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