net: stm32: add designware mac glue code for stm32

This patch adds glue code required for enabling the designware
mac on stm32f7 devices.

Signed-off-by: Michael Kurz <michi.kurz@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

3 files changed, 44 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-stm32f7/stm32_periph.h b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h
index 9b315a8c63..508b5f2716 100644
--- a/arch/arm/include/asm/arch-stm32f7/stm32_periph.h
+++ b/arch/arm/include/asm/arch-stm32f7/stm32_periph.h
@@ -36,6 +36,7 @@ enum periph_clock {
 	SYSCFG_CLOCK_CFG,
 	TIMER2_CLOCK_CFG,
 	FMC_CLOCK_CFG,
+	STMMAC_CLOCK_CFG,
 };
 
 #endif /* __ASM_ARM_ARCH_PERIPH_H */
diff --git a/arch/arm/include/asm/arch-stm32f7/syscfg.h b/arch/arm/include/asm/arch-stm32f7/syscfg.h
new file mode 100644
index 0000000000..49e78f203d
--- /dev/null
+++ b/arch/arm/include/asm/arch-stm32f7/syscfg.h
@@ -0,0 +1,38 @@
+/*
+ * (C) Copyright 2016
+ * Michael Kurz, michi.kurz@gmail.com.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _STM32_SYSCFG_H
+#define _STM32_SYSCFG_H
+
+struct stm32_syscfg_regs {
+	u32 memrmp;
+	u32 pmc;
+	u32 exticr1;
+	u32 exticr2;
+	u32 exticr3;
+	u32 exticr4;
+	u32 cmpcr;
+};
+
+/*
+ * SYSCFG registers base
+ */
+#define STM32_SYSCFG		((struct stm32_syscfg_regs *)STM32_SYSCFG_BASE)
+
+/* SYSCFG memory remap register */
+#define SYSCFG_MEMRMP_MEM_BOOT	BIT(0)
+#define SYSCFG_MEMRMP_SWP_FMC	BIT(10)
+
+/* SYSCFG peripheral mode configuration register */
+#define SYSCFG_PMC_ADCXDC2	BIT(16)
+#define SYSCFG_PMC_MII_RMII_SEL	BIT(23)
+
+/* Compensation cell control register */
+#define SYSCFG_CMPCR_CMP_PD	BIT(0)
+#define SYSCFG_CMPCR_READY	BIT(8)
+
+#endif
diff --git a/arch/arm/mach-stm32/stm32f7/clock.c b/arch/arm/mach-stm32/stm32f7/clock.c
index 4faf1747a8..8b3d3fd73a 100644
--- a/arch/arm/mach-stm32/stm32f7/clock.c
+++ b/arch/arm/mach-stm32/stm32f7/clock.c
@@ -261,6 +261,11 @@ void clock_setup(int peripheral)
 	case FMC_CLOCK_CFG:
 		setbits_le32(&STM32_RCC->ahb3enr, RCC_AHB3ENR_FMC_EN);
 		break;
+	case STMMAC_CLOCK_CFG:
+		setbits_le32(&STM32_RCC->ahb1enr, RCC_AHB1ENR_ETHMAC_EN);
+		setbits_le32(&STM32_RCC->ahb1enr, RCC_AHB1ENR_ETHMAC_RX_EN);
+		setbits_le32(&STM32_RCC->ahb1enr, RCC_AHB1ENR_ETHMAC_TX_EN);
+		break;
 	default:
 		break;
 	}