ARM: meson: rework soc arch file to prepare for new SoC

We are about to add support for the Amlogic AXG SoC. While very close to
the Gx SoC family, we will need to handle a few thing which are different
in this SoC. Rework the meson arch directory to prepare for this.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

6 files changed, 118 insertions, 110 deletions

diff --git a/arch/arm/mach-meson/Kconfig b/arch/arm/mach-meson/Kconfig
index 6f60167c8cf..6225417a56b 100644
--- a/arch/arm/mach-meson/Kconfig
+++ b/arch/arm/mach-meson/Kconfig
@@ -8,25 +8,29 @@ config MESON64_COMMON
 	select DM_SERIAL
 	imply CMD_DM
 
+config MESON_GX
+	bool
+	select MESON64_COMMON
+
 choice
 	prompt "Platform select"
 	default MESON_GXBB
 
 config MESON_GXBB
 	bool "GXBB"
-	select MESON64_COMMON
+	select MESON_GX
 	help
 	  Select this if your SoC is an S905
 
 config MESON_GXL
 	bool "GXL"
-	select MESON64_COMMON
+	select MESON_GX
 	help
 	  Select this if your SoC is an S905X/D or S805X
 
 config MESON_GXM
 	bool "GXM"
-	select MESON64_COMMON
+	select MESON_GX
 	help
 	  Select this if your SoC is an S912
 
diff --git a/arch/arm/mach-meson/Makefile b/arch/arm/mach-meson/Makefile
index 8ad9b3e575e..78345b47f25 100644
--- a/arch/arm/mach-meson/Makefile
+++ b/arch/arm/mach-meson/Makefile
@@ -2,4 +2,5 @@
 #
 # Copyright (c) 2016 Beniamino Galvani <b.galvani@gmail.com>
 
-obj-y += board.o sm.o eth.o
+obj-y += board-common.o sm.o
+obj-$(CONFIG_MESON_GX) += board-gx.o
diff --git a/arch/arm/mach-meson/board-common.c b/arch/arm/mach-meson/board-common.c
new file mode 100644
index 00000000000..6340445053b
--- /dev/null
+++ b/arch/arm/mach-meson/board-common.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com>
+ */
+
+#include <common.h>
+#include <linux/libfdt.h>
+#include <linux/err.h>
+#include <asm/arch/mem.h>
+#include <asm/arch/sm.h>
+#include <asm/armv8/mmu.h>
+#include <asm/unaligned.h>
+#include <efi_loader.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	const fdt64_t *val;
+	int offset;
+	int len;
+
+	offset = fdt_path_offset(gd->fdt_blob, "/memory");
+	if (offset < 0)
+		return -EINVAL;
+
+	val = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
+	if (len < sizeof(*val) * 2)
+		return -EINVAL;
+
+	/* Use unaligned access since cache is still disabled */
+	gd->ram_size = get_unaligned_be64(&val[1]);
+
+	return 0;
+}
+
+void meson_board_add_reserved_memory(void *fdt, u64 start, u64 size)
+{
+	int ret;
+
+	ret = fdt_add_mem_rsv(fdt, start, size);
+	if (ret)
+		printf("Could not reserve zone @ 0x%llx\n", start);
+
+	if (IS_ENABLED(CONFIG_EFI_LOADER)) {
+		efi_add_memory_map(start,
+				   ALIGN(size, EFI_PAGE_SIZE) >> EFI_PAGE_SHIFT,
+				   EFI_RESERVED_MEMORY_TYPE, false);
+	}
+}
+
+void reset_cpu(ulong addr)
+{
+	psci_system_reset();
+}
diff --git a/arch/arm/mach-meson/board.c b/arch/arm/mach-meson/board-gx.c
index d6c62531521..f1397f87c5b 100644
--- a/arch/arm/mach-meson/board.c
+++ b/arch/arm/mach-meson/board-gx.c
@@ -1,64 +1,24 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com>
+ * (C) Copyright 2018 Neil Armstrong <narmstrong@baylibre.com>
  */
 
 #include <common.h>
-#include <linux/libfdt.h>
-#include <linux/err.h>
+#include <asm/arch/eth.h>
 #include <asm/arch/gx.h>
-#include <asm/arch/sm.h>
+#include <asm/arch/mem.h>
+#include <asm/io.h>
 #include <asm/armv8/mmu.h>
-#include <asm/unaligned.h>
 #include <linux/sizes.h>
-#include <efi_loader.h>
-#include <asm/io.h>
+#include <phy.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-int dram_init(void)
-{
-	const fdt64_t *val;
-	int offset;
-	int len;
-
-	offset = fdt_path_offset(gd->fdt_blob, "/memory");
-	if (offset < 0)
-		return -EINVAL;
-
-	val = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
-	if (len < sizeof(*val) * 2)
-		return -EINVAL;
-
-	/* Use unaligned access since cache is still disabled */
-	gd->ram_size = get_unaligned_be64(&val[1]);
-
-	return 0;
-}
-
-phys_size_t get_effective_memsize(void)
-{
-	/* Size is reported in MiB, convert it in bytes */
-	return ((readl(GX_AO_SEC_GP_CFG0) & GX_AO_MEM_SIZE_MASK)
-			>> GX_AO_MEM_SIZE_SHIFT) * SZ_1M;
-}
-
-static void meson_board_add_reserved_memory(void *fdt, u64 start, u64 size)
-{
-	int ret;
-
-	ret = fdt_add_mem_rsv(fdt, start, size);
-	if (ret)
-		printf("Could not reserve zone @ 0x%llx\n", start);
-
-	if (IS_ENABLED(CONFIG_EFI_LOADER)) {
-		efi_add_memory_map(start,
-				   ALIGN(size, EFI_PAGE_SIZE) >> EFI_PAGE_SHIFT,
-				   EFI_RESERVED_MEMORY_TYPE, false);
-	}
-}
-
-void meson_gx_init_reserved_memory(void *fdt)
+/* Configure the reserved memory zones exported by the secure registers
+ * into EFI and DTB reserved memory entries.
+ */
+void meson_init_reserved_memory(void *fdt)
 {
 	u64 bl31_size, bl31_start;
 	u64 bl32_size, bl32_start;
@@ -70,7 +30,6 @@ void meson_gx_init_reserved_memory(void *fdt)
 	 * - AO_SEC_GP_CFG5: bl31 physical start address, can be NULL
 	 * - AO_SEC_GP_CFG4: bl32 physical start address, can be NULL
 	 */
-
 	reg = readl(GX_AO_SEC_GP_CFG3);
 
 	bl31_size = ((reg & GX_AO_BL31_RSVMEM_SIZE_MASK)
@@ -102,9 +61,11 @@ void meson_gx_init_reserved_memory(void *fdt)
 		meson_board_add_reserved_memory(fdt, bl32_start, bl32_size);
 }
 
-void reset_cpu(ulong addr)
+phys_size_t get_effective_memsize(void)
 {
-	psci_system_reset();
+	/* Size is reported in MiB, convert it in bytes */
+	return ((readl(GX_AO_SEC_GP_CFG0) & GX_AO_MEM_SIZE_MASK)
+			>> GX_AO_MEM_SIZE_SHIFT) * SZ_1M;
 }
 
 static struct mm_region gx_mem_map[] = {
@@ -128,3 +89,44 @@ static struct mm_region gx_mem_map[] = {
 };
 
 struct mm_region *mem_map = gx_mem_map;
+
+/* Configure the Ethernet MAC with the requested interface mode
+ * with some optional flags.
+ */
+void meson_eth_init(phy_interface_t mode, unsigned int flags)
+{
+	switch (mode) {
+	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
+		/* Set RGMII mode */
+		setbits_le32(GX_ETH_REG_0, GX_ETH_REG_0_PHY_INTF |
+			     GX_ETH_REG_0_TX_PHASE(1) |
+			     GX_ETH_REG_0_TX_RATIO(4) |
+			     GX_ETH_REG_0_PHY_CLK_EN |
+			     GX_ETH_REG_0_CLK_EN);
+		break;
+
+	case PHY_INTERFACE_MODE_RMII:
+		/* Set RMII mode */
+		out_le32(GX_ETH_REG_0, GX_ETH_REG_0_INVERT_RMII_CLK |
+					 GX_ETH_REG_0_CLK_EN);
+
+		/* Use GXL RMII Internal PHY */
+		if (IS_ENABLED(CONFIG_MESON_GXL) &&
+		    (flags & MESON_USE_INTERNAL_RMII_PHY)) {
+			writel(0x10110181, GX_ETH_REG_2);
+			writel(0xe40908ff, GX_ETH_REG_3);
+		}
+
+		break;
+
+	default:
+		printf("Invalid Ethernet interface mode\n");
+		return;
+	}
+
+	/* Enable power gate */
+	clrbits_le32(GX_MEM_PD_REG_0, GX_MEM_PD_REG_0_ETH_MASK);
+}
diff --git a/arch/arm/mach-meson/eth.c b/arch/arm/mach-meson/eth.c
deleted file mode 100644
index 8b28bc85311..00000000000
--- a/arch/arm/mach-meson/eth.c
+++ /dev/null
@@ -1,53 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2016 BayLibre, SAS
- * Author: Neil Armstrong <narmstrong@baylibre.com>
- */
-
-#include <common.h>
-#include <dm.h>
-#include <asm/io.h>
-#include <asm/arch/gx.h>
-#include <asm/arch/eth.h>
-#include <phy.h>
-
-/* Configure the Ethernet MAC with the requested interface mode
- * with some optional flags.
- */
-void meson_gx_eth_init(phy_interface_t mode, unsigned int flags)
-{
-	switch (mode) {
-	case PHY_INTERFACE_MODE_RGMII:
-	case PHY_INTERFACE_MODE_RGMII_ID:
-	case PHY_INTERFACE_MODE_RGMII_RXID:
-	case PHY_INTERFACE_MODE_RGMII_TXID:
-		/* Set RGMII mode */
-		setbits_le32(GX_ETH_REG_0, GX_ETH_REG_0_PHY_INTF |
-			     GX_ETH_REG_0_TX_PHASE(1) |
-			     GX_ETH_REG_0_TX_RATIO(4) |
-			     GX_ETH_REG_0_PHY_CLK_EN |
-			     GX_ETH_REG_0_CLK_EN);
-		break;
-
-	case PHY_INTERFACE_MODE_RMII:
-		/* Set RMII mode */
-		out_le32(GX_ETH_REG_0, GX_ETH_REG_0_INVERT_RMII_CLK |
-					 GX_ETH_REG_0_CLK_EN);
-
-		/* Use GXL RMII Internal PHY */
-		if (IS_ENABLED(CONFIG_MESON_GXL) &&
-		    (flags & MESON_GXL_USE_INTERNAL_RMII_PHY)) {
-			writel(0x10110181, GX_ETH_REG_2);
-			writel(0xe40908ff, GX_ETH_REG_3);
-		}
-
-		break;
-
-	default:
-		printf("Invalid Ethernet interface mode\n");
-		return;
-	}
-
-	/* Enable power gate */
-	clrbits_le32(GX_MEM_PD_REG_0, GX_MEM_PD_REG_0_ETH_MASK);
-}
diff --git a/arch/arm/mach-meson/sm.c b/arch/arm/mach-meson/sm.c
index 0bba5e4a073..a07b46895d8 100644
--- a/arch/arm/mach-meson/sm.c
+++ b/arch/arm/mach-meson/sm.c
@@ -6,7 +6,6 @@
  */
 
 #include <common.h>
-#include <asm/arch/gx.h>
 #include <linux/kernel.h>
 
 #define FN_GET_SHARE_MEM_INPUT_BASE	0x82000020