board: kontron: add sl28 support

Add basic support for the Kontron SMARC-sAL28 board. This includes just
the bare minimum to be able to bring up the board and boot linux.

For now, the Single and Dual PHY variant is supported. Other variants
will fall back to the basic variant.

In particular, there is no watchdog support for now. This means that you
have to disable the default watchdog, otherwise you'll end up in the
recovery bootloader. See the board README for details.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Heiko Thiery <heiko.thiery@gmail.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

7 files changed, 241 insertions, 0 deletions

diff --git a/board/kontron/sl28/Kconfig b/board/kontron/sl28/Kconfig
new file mode 100644
index 0000000000..cdec39be01
--- /dev/null
+++ b/board/kontron/sl28/Kconfig
@@ -0,0 +1,18 @@
+if TARGET_SL28
+
+config SYS_BOARD
+	default "sl28"
+
+config SYS_VENDOR
+	default "kontron"
+
+config SYS_SOC
+	default "fsl-layerscape"
+
+config SYS_CONFIG_NAME
+	default "kontron_sl28"
+
+config SYS_TEXT_BASE
+	default 0x96000000
+
+endif
diff --git a/board/kontron/sl28/MAINTAINERS b/board/kontron/sl28/MAINTAINERS
new file mode 100644
index 0000000000..a7b0fbbdd1
--- /dev/null
+++ b/board/kontron/sl28/MAINTAINERS
@@ -0,0 +1,7 @@
+Kontron SMARC-sAL28 board
+M:	Michael Walle <michael@walle.cc>
+S:	Maintained
+F:	arch/arm/dts/fsl-ls1028a-kontron-sl28-*
+F:	board/kontron/sl28/
+F:	configs/kontron_sl28_defconfig
+F:	include/configs/kontron_sl28.h
diff --git a/board/kontron/sl28/Makefile b/board/kontron/sl28/Makefile
new file mode 100644
index 0000000000..0f1866c874
--- /dev/null
+++ b/board/kontron/sl28/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier:	GPL-2.0+
+
+ifndef CONFIG_SPL_BUILD
+obj-y += sl28.o
+endif
+
+obj-y += common.o ddr.o
+obj-$(CONFIG_SPL_BUILD) += spl.o
diff --git a/board/kontron/sl28/common.c b/board/kontron/sl28/common.c
new file mode 100644
index 0000000000..14704f7051
--- /dev/null
+++ b/board/kontron/sl28/common.c
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <common.h>
+#include <asm/arch-fsl-layerscape/soc.h>
+
+int board_early_init_f(void)
+{
+	fsl_lsch3_early_init_f();
+	return 0;
+}
diff --git a/board/kontron/sl28/ddr.c b/board/kontron/sl28/ddr.c
new file mode 100644
index 0000000000..d111b6d4c3
--- /dev/null
+++ b/board/kontron/sl28/ddr.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <common.h>
+#include <asm/io.h>
+#include <fsl_ddr_sdram.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define DCFG_GPPORCR1 0x20
+
+#define GPPORCR1_MEM_MASK		(0x7 << 5)
+#define GPPORCR1_MEM_512MB_CS0		(0x0 << 5)
+#define GPPORCR1_MEM_1GB_CS0		(0x1 << 5)
+#define GPPORCR1_MEM_2GB_CS0		(0x2 << 5)
+#define GPPORCR1_MEM_4GB_CS0_1		(0x3 << 5)
+#define GPPORCR1_MEM_4GB_CS0_2		(0x4 << 5)
+#define GPPORCR1_MEM_8GB_CS0_1_2_3	(0x5 << 5)
+#define GPPORCR1_MEM_8GB_CS0_1		(0x6 << 5)
+
+static fsl_ddr_cfg_regs_t __maybe_unused ddr_cfg_regs = {
+	.cs[0].bnds		= 0x0000007f,
+	.cs[0].config		= 0x80044402,
+	.cs[1].bnds		= 0x008000ff,
+	.cs[1].config		= 0x80004402,
+
+	.timing_cfg_0		= 0x9011010c,
+	.timing_cfg_3		= 0x010c1000,
+	.timing_cfg_1		= 0xbcb48c66,
+	.timing_cfg_2		= 0x0fc0d118,
+	.ddr_sdram_cfg		= 0xe70c000c,
+	.ddr_sdram_cfg_2	= 0x24401111,
+	.ddr_sdram_mode		= 0x00441c70,
+	.ddr_sdram_mode_3	= 0x00001c70,
+	.ddr_sdram_mode_5	= 0x00001c70,
+	.ddr_sdram_mode_7	= 0x00001c70,
+	.ddr_sdram_mode_2	= 0x00180000,
+	.ddr_sdram_mode_4	= 0x00180000,
+	.ddr_sdram_mode_6	= 0x00180000,
+	.ddr_sdram_mode_8	= 0x00180000,
+
+	.ddr_sdram_interval	= 0x0c30030c,
+	.ddr_data_init		= 0xdeadbeef,
+
+	.ddr_sdram_clk_cntl	= 0x02400000,
+
+	.timing_cfg_4		= 0x00000001,
+	.timing_cfg_5		= 0x04401400,
+
+	.ddr_zq_cntl		= 0x89080600,
+	.ddr_wrlvl_cntl		= 0x8675f606,
+	.ddr_wrlvl_cntl_2	= 0x04080700,
+	.ddr_wrlvl_cntl_3	= 0x00000009,
+
+	.ddr_cdr1		= 0x80040000,
+	.ddr_cdr2		= 0x0000bc01,
+};
+
+int fsl_initdram(void)
+{
+	u32 gpporcr1 = in_le32(DCFG_BASE + DCFG_GPPORCR1);
+	phys_size_t dram_size;
+
+	switch (gpporcr1 & GPPORCR1_MEM_MASK) {
+	case GPPORCR1_MEM_2GB_CS0:
+		dram_size = 0x80000000;
+		ddr_cfg_regs.cs[1].bnds = 0;
+		ddr_cfg_regs.cs[1].config = 0;
+		ddr_cfg_regs.cs[1].config_2 = 0;
+		break;
+	case GPPORCR1_MEM_4GB_CS0_1:
+		dram_size = 0x100000000ULL;
+		break;
+	case GPPORCR1_MEM_512MB_CS0:
+		dram_size = 0x20000000;
+		fallthrough; /* for now */
+	case GPPORCR1_MEM_1GB_CS0:
+		dram_size = 0x40000000;
+		fallthrough; /* for now */
+	case GPPORCR1_MEM_4GB_CS0_2:
+		dram_size = 0x100000000ULL;
+		fallthrough; /* for now */
+	case GPPORCR1_MEM_8GB_CS0_1:
+	case GPPORCR1_MEM_8GB_CS0_1_2_3:
+		dram_size = 0x200000000ULL;
+		fallthrough; /* for now */
+	default:
+		panic("Unsupported memory configuration (%08x)\n",
+		      gpporcr1 & GPPORCR1_MEM_MASK);
+		break;
+	}
+
+	if (!IS_ENABLED(CONFIG_SPL) || IS_ENABLED(CONFIG_SPL_BUILD))
+		fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
+
+	gd->ram_size = dram_size;
+
+	return 0;
+}
diff --git a/board/kontron/sl28/sl28.c b/board/kontron/sl28/sl28.c
new file mode 100644
index 0000000000..b18127c4d1
--- /dev/null
+++ b/board/kontron/sl28/sl28.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <common.h>
+#include <malloc.h>
+#include <errno.h>
+#include <fsl_ddr.h>
+#include <fdt_support.h>
+#include <linux/libfdt.h>
+#include <env_internal.h>
+#include <asm/arch-fsl-layerscape/soc.h>
+#include <asm/arch-fsl-layerscape/fsl_icid.h>
+#include <i2c.h>
+#include <asm/arch/soc.h>
+#include <fsl_immap.h>
+#include <netdev.h>
+
+#include <fdtdec.h>
+#include <miiphy.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_init(void)
+{
+	if (CONFIG_IS_ENABLED(FSL_CAAM))
+		sec_init();
+
+	return 0;
+}
+
+int board_eth_init(struct bd_info *bis)
+{
+	return pci_eth_init(bis);
+}
+
+int checkboard(void)
+{
+	printf("EL:    %d\n", current_el());
+	return 0;
+}
+
+void detail_board_ddr_info(void)
+{
+	puts("\nDDR    ");
+	print_size(gd->bd->bi_dram[0].size + gd->bd->bi_dram[1].size, "");
+	print_ddr_info(0);
+}
+
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	u64 base[CONFIG_NR_DRAM_BANKS];
+	u64 size[CONFIG_NR_DRAM_BANKS];
+	int nbanks = CONFIG_NR_DRAM_BANKS;
+	int i;
+
+	ft_cpu_setup(blob, bd);
+
+	/* fixup DT for the two GPP DDR banks */
+	for (i = 0; i < nbanks; i++) {
+		base[i] = gd->bd->bi_dram[i].start;
+		size[i] = gd->bd->bi_dram[i].size;
+	}
+
+	fdt_fixup_memory_banks(blob, base, size, nbanks);
+
+	fdt_fixup_icid(blob);
+
+	return 0;
+}
diff --git a/board/kontron/sl28/spl.c b/board/kontron/sl28/spl.c
new file mode 100644
index 0000000000..fa5829eee0
--- /dev/null
+++ b/board/kontron/sl28/spl.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/spl.h>
+
+#define DCFG_RCWSR25 0x160
+#define GPINFO_HW_VARIANT_MASK 0xff
+
+int sl28_variant(void)
+{
+	return in_le32(DCFG_BASE + DCFG_RCWSR25) & GPINFO_HW_VARIANT_MASK;
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	int variant = sl28_variant();
+
+	switch (variant) {
+	case 3:
+		return strcmp(name, "fsl-ls1028a-kontron-sl28-var3");
+	case 4:
+		return strcmp(name, "fsl-ls1028a-kontron-sl28-var4");
+	default:
+		return strcmp(name, "fsl-ls1028a-kontron-sl28");
+	}
+}
+
+void board_boot_order(u32 *spl_boot_list)
+{
+	spl_boot_list[0] = BOOT_DEVICE_SPI;
+}