U-Boot for Acme Systems Arietta G25 based on the linux4sam_5.3 version

arch/arm/mach-at91/Kconfig

@@ -130,6 +130,11 @@ config TARGET_VINCO
 	select CPU_V7
 	select SUPPORT_SPL
 
+config TARGET_ARIETTA_G25
+	bool "Acme Systems Arietta-G25 board"
+	select CPU_ARM926EJS
+	select SUPPORT_SPL
+
 endchoice
 
 config SYS_SOC
@@ -162,5 +167,6 @@ source "board/ronetix/pm9g45/Kconfig"
 source "board/siemens/corvus/Kconfig"
 source "board/siemens/taurus/Kconfig"
 source "board/siemens/smartweb/Kconfig"
+source "board/acmesystems/arietta_g25/Kconfig"
 
 endif

board/acmesystems/arietta_g25/Kconfig

@@ -0,0 +1,15 @@
+if TARGET_ARIETTA_G25
+
+config SYS_BOARD
+	default "arietta_g25"
+
+config SYS_VENDOR
+	default "acmesystems"
+
+config SYS_SOC
+	default "at91"
+
+config SYS_CONFIG_NAME
+	default "arietta_g25"
+
+endif

board/acmesystems/arietta_g25/MAINTAINERS

@@ -0,0 +1,7 @@
+ACME SYSTEMS ARIETTA-G25 BOARD
+M:	Biagio Montaruli <[email protected]>
+S:	Maintained
+F:	board/acmesystems/arietta_g25/
+F:	include/configs/arietta_g25.h
+F:	configs/arietta_g25_128mb_defconfig
+F:	configs/arietta_g25_256mb_defconfig

board/acmesystems/arietta_g25/Makefile

@@ -0,0 +1,19 @@
+#
+# (C) Copyright 2003-2008
+# Wolfgang Denk, DENX Software Engineering, [email protected].
+#
+# (C) Copyright 2008
+# Stelian Pop <[email protected]>
+# Lead Tech Design <www.leadtechdesign.com>
+#
+# (C) Copyright 2012
+# Bo Shen <[email protected]>
+# Atmel corporation <www.atmel.com>
+#
+# (C) Copyright 2016
+# Biagio Montaruli <[email protected]>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y += arietta_g25.o

board/acmesystems/arietta_g25/arietta_g25.c

@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2012 Atmel Corporation
+ *
+ * Based on at91sam9x5ek.c and modified by Biagio Montaruli <[email protected]> 
+ * in order to configure U-Boot for Arietta-G25 SOM <http://www.acmesystems.it/arietta>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/at91sam9x5_matrix.h>
+#include <asm/arch/at91sam9_smc.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/at91_rstc.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/gpio.h>
+#include <atmel_mci.h>
+#include <netdev.h>
+#ifdef CONFIG_ATMEL_SPI
+#include <spi.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* ------------------------------------------------------------------------- */
+/*
+ * Miscelaneous platform dependent initialisations
+ */
+
+/* SPI chip select control */
+#ifdef CONFIG_ATMEL_SPI
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	return bus == 0 && cs < 2;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+	switch (slave->cs) {
+	case 1:
+		at91_set_pio_output(AT91_PIO_PORTA, 7, 0);
+		break;
+	case 0:
+	default:
+		at91_set_pio_output(AT91_PIO_PORTA, 14, 0);
+		break;
+	}
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+	switch (slave->cs) {
+	case 1:
+		at91_set_pio_output(AT91_PIO_PORTA, 7, 1);
+		break;
+	case 0:
+	default:
+		at91_set_pio_output(AT91_PIO_PORTA, 14, 1);
+		break;
+	}
+}
+#endif /* CONFIG_ATMEL_SPI */
+
+#ifdef CONFIG_GENERIC_ATMEL_MCI
+int board_mmc_init(bd_t *bd)
+{
+	at91_mci_hw_init();
+
+	return atmel_mci_init((void *)ATMEL_BASE_HSMCI0);
+}
+#endif
+
+int board_early_init_f(void)
+{
+	at91_seriald_hw_init();
+	return 0;
+}
+
+int board_init(void)
+{
+	/* arch number of AT91SAM9X5EK-Board */
+	gd->bd->bi_arch_number = MACH_TYPE_AT91SAM9X5EK;
+
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+#ifdef CONFIG_ATMEL_SPI
+	at91_spi0_hw_init(1 << 4);
+#endif
+
+#if defined(CONFIG_USB_OHCI_NEW) || defined(CONFIG_USB_EHCI)
+	at91_uhp_hw_init();
+#endif
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size((void *) CONFIG_SYS_SDRAM_BASE,
+					CONFIG_SYS_SDRAM_SIZE);
+	return 0;
+}
+
+#if defined(CONFIG_SPL_BUILD)
+#include <spl.h>
+
+void at91_spl_board_init(void)
+{
+#ifdef CONFIG_SYS_USE_MMC
+	at91_mci_hw_init();
+#elif CONFIG_SYS_USE_SPIFLASH
+	at91_spi0_hw_init(1 << 4);
+#endif
+}
+
+#include <asm/arch/atmel_mpddrc.h>
+static void ddr2_conf(struct atmel_mpddrc_config *ddr2)
+{
+	ddr2->md = (ATMEL_MPDDRC_MD_DBW_16_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM);
+
+	ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
+		    ATMEL_MPDDRC_CR_NR_ROW_13 |
+		    ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
+		    ATMEL_MPDDRC_CR_NB_8BANKS |
+		    ATMEL_MPDDRC_CR_DECOD_INTERLEAVED);
+
+	ddr2->rtr = 0x411;
+
+	ddr2->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TWR_OFFSET |
+		      8 << ATMEL_MPDDRC_TPR0_TRC_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRP_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET);
+
+	ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET |
+		      200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET |
+		      19 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET |
+		      18 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET);
+
+	ddr2->tpr2 = (7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET |
+		      3 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET |
+		      7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET);
+}
+
+void mem_init(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+	struct atmel_mpddrc_config ddr2;
+	unsigned long csa;
+
+	ddr2_conf(&ddr2);
+
+	/* enable DDR2 clock */
+	writel(AT91_PMC_DDR, &pmc->scer);
+
+	/* Chip select 1 is for DDR2/SDRAM */
+	csa = readl(&matrix->ebicsa);
+	csa |= AT91_MATRIX_EBI_CS1A_SDRAMC;
+	csa &= ~AT91_MATRIX_EBI_DBPU_OFF;
+	csa |= AT91_MATRIX_EBI_DBPD_OFF;
+	csa |= AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
+	writel(csa, &matrix->ebicsa);
+
+	/* DDRAM2 Controller initialize */
+	ddr2_init(ATMEL_BASE_DDRSDRC, ATMEL_BASE_CS1, &ddr2);
+}
+#endif

configs/arietta_g25_128mb_defconfig

@@ -0,0 +1,11 @@
+CONFIG_ARM=y
+CONFIG_ARCH_AT91=y
+CONFIG_TARGET_ARIETTA_G25=y
+CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9X5,SYS_USE_MMC,RAM_128MB"
+CONFIG_SYS_PROMPT="U-Boot> "
+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_PROMPT="Press SPACE to abort autoboot in %d seconds\n"
+CONFIG_AUTOBOOT_DELAY_STR="d"
+CONFIG_AUTOBOOT_STOP_STR=" "
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_ATMEL=y

configs/arietta_g25_256mb_defconfig

@@ -0,0 +1,11 @@
+CONFIG_ARM=y
+CONFIG_ARCH_AT91=y
+CONFIG_TARGET_ARIETTA_G25=y
+CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9X5,SYS_USE_MMC,RAM_256MB"
+CONFIG_SYS_PROMPT="U-Boot> "
+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_PROMPT="Press SPACE to abort autoboot in %d seconds\n"
+CONFIG_AUTOBOOT_DELAY_STR="d"
+CONFIG_AUTOBOOT_STOP_STR=" "
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_ATMEL=y