board: Add support for Conclusive KSTR-SAMA5D27

Introduce support for Conclusive KSTR-SAMA5D27 Single Board Computer.

Co-developed-by: Jakub Klama <jakub@conclusive.pl>
Signed-off-by: Jakub Klama <jakub@conclusive.pl>
Co-developed-by: Marcin Jabrzyk <marcin@conclusive.pl>
Signed-off-by: Marcin Jabrzyk <marcin@conclusive.pl>
Signed-off-by: Artur Rojek <artur@conclusive.pl>

4 files changed, 268 insertions, 0 deletions

diff --git a/board/conclusive/kstr-sama5d27/Kconfig b/board/conclusive/kstr-sama5d27/Kconfig
new file mode 100644
index 0000000000..572551cfda
--- /dev/null
+++ b/board/conclusive/kstr-sama5d27/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_KSTR_SAMA5D27
+
+config SYS_BOARD
+	default "kstr-sama5d27"
+
+config SYS_VENDOR
+	default "conclusive"
+
+config SYS_SOC
+	default "at91"
+
+config SYS_CONFIG_NAME
+	default "kstr-sama5d27"
+
+endif
diff --git a/board/conclusive/kstr-sama5d27/MAINTAINERS b/board/conclusive/kstr-sama5d27/MAINTAINERS
new file mode 100644
index 0000000000..b788228488
--- /dev/null
+++ b/board/conclusive/kstr-sama5d27/MAINTAINERS
@@ -0,0 +1,9 @@
+CONCLUSIVE KSTR-SAMA5D27 BOARD
+M:	Jakub Klama <jakub@conclusive.pl>
+M:	Artur Rojek <artur@conclusive.pl>
+S:	Maintained
+F:	board/conclusive/kstr-sama5d27
+F:	include/configs/kstr-sama5d27.h
+F:	configs/kstr_sama5d27_defconfig
+F:	arch/arm/dts/at91-kstr-sama5d27.dts
+F:	arch/arm/dts/at91-kstr-sama5d27-u-boot.dtsi
diff --git a/board/conclusive/kstr-sama5d27/Makefile b/board/conclusive/kstr-sama5d27/Makefile
new file mode 100644
index 0000000000..edf7d1c934
--- /dev/null
+++ b/board/conclusive/kstr-sama5d27/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2019-2023 Conclusive Engineering Sp. z o. o.
+
+obj-y += kstr-sama5d27.o
diff --git a/board/conclusive/kstr-sama5d27/kstr-sama5d27.c b/board/conclusive/kstr-sama5d27/kstr-sama5d27.c
new file mode 100644
index 0000000000..1b765b1137
--- /dev/null
+++ b/board/conclusive/kstr-sama5d27/kstr-sama5d27.c
@@ -0,0 +1,239 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * kstr-sama5d27.c - Board init file for Conclusive KSTR-SAMA5D27 board
+ * Copyright (C) 2021-2023 Conclusive Engineering Sp. z o. o.
+ */
+
+#include <common.h>
+#include <debug_uart.h>
+#include <init.h>
+#include <env.h>
+#include <fdt_support.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/atmel_pio4.h>
+#include <asm/arch/atmel_mpddrc.h>
+#include <asm/arch/atmel_sdhci.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/sama5d2.h>
+#include <linux/delay.h>
+
+#ifdef CONFIG_USB_GADGET_ATMEL_USBA
+#include <asm/arch/atmel_usba_udc.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_DEBUG_UART_BOARD_INIT
+static void board_uart1_hw_init(void)
+{
+	/* URXD1 */
+	atmel_pio4_set_a_periph(AT91_PIO_PORTD, 2, ATMEL_PIO_PUEN_MASK);
+	/* UTXD1 */
+	atmel_pio4_set_a_periph(AT91_PIO_PORTD, 3, 0);
+	at91_periph_clk_enable(ATMEL_ID_UART1);
+}
+
+void board_debug_uart_init(void)
+{
+	board_uart1_hw_init();
+}
+#endif
+
+void board_lan8720a_init(void)
+{
+	/* LAN8720A_nRST */
+	atmel_pio4_set_pio_output(AT91_PIO_PORTB, 12, 0);
+	/*
+	 * Force 0 on RXER/PHYAD0. LAN8720A chipset will latch with address 0 on
+	 * MDIO bus.
+	 */
+	atmel_pio4_set_pio_output(AT91_PIO_PORTB, 17, 0);
+	/* Minimal delay of reset signal is 25 ms */
+	mdelay(30);
+	/* LAN8720A_nRST */
+	atmel_pio4_set_pio_output(AT91_PIO_PORTB, 12, 1);
+}
+
+void board_usba_init(void)
+{
+#ifdef CONFIG_USB_GADGET_ATMEL_USBA
+	/* USB device peripheral initialization: sama5d2_devices.c */
+	at91_udp_hw_init();
+	/* USB device controller drivers/usb/gadget/atmel_usba_udc.c */
+	usba_udc_probe(&pdata);
+#endif
+}
+
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+int board_early_init_f(void)
+{
+#ifdef CONFIG_DEBUG_UART
+	debug_uart_init();
+#endif
+
+	return 0;
+}
+#endif
+
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	char *wlanaddr = env_get("eth1addr");
+
+	if (wlanaddr)
+		do_fixup_by_compat(blob, "brcm,bcm4329-fmac", "local-mac-address",
+				   wlanaddr, strlen(wlanaddr), 1);
+	else
+		printf("Not setting WIFI mac address. Check if EEPROM TLV is correctly set up.\n");
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = CFG_SYS_SDRAM_BASE + 0x100;
+
+	board_usba_init();
+	board_lan8720a_init();
+
+	return 0;
+}
+
+static int settings_r(void)
+{
+	mac_read_from_eeprom();
+	serial_read_from_eeprom(0);
+
+	return 0;
+}
+EVENT_SPY_SIMPLE(EVT_SETTINGS_R, settings_r);
+
+#if defined(CONFIG_DISPLAY_BOARDINFO_LATE)
+int checkboard(void)
+{
+	const char *serial_number;
+
+	serial_number = env_get("serial#");
+	if (!serial_number)
+		printf("Warning: unknown serial number.\n");
+	else
+		printf("S/N:   %s\n", serial_number);
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_MISC_INIT_R
+int misc_init_r(void)
+{
+	return 0;
+}
+#endif
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size((void *)CFG_SYS_SDRAM_BASE,
+				    CFG_SYS_SDRAM_SIZE);
+	return 0;
+}
+
+/* SPL */
+#ifdef CONFIG_SPL_BUILD
+void spl_board_init(void)
+{
+}
+
+static void ddrc_conf(struct atmel_mpddrc_config *ddrc)
+{
+	ddrc->md = (ATMEL_MPDDRC_MD_DBW_16_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM);
+
+	ddrc->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
+		    ATMEL_MPDDRC_CR_NR_ROW_13 |
+		    ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
+		    ATMEL_MPDDRC_CR_DIC_DS |
+		    ATMEL_MPDDRC_CR_ZQ_LONG |
+		    ATMEL_MPDDRC_CR_NB_8BANKS |
+		    ATMEL_MPDDRC_CR_DECOD_INTERLEAVED |
+		    ATMEL_MPDDRC_CR_UNAL_SUPPORTED);
+
+	ddrc->rtr = 0x511;
+
+	ddrc->tpr0 = ((7 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET) |
+		      (3 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET) |
+		      (3 << ATMEL_MPDDRC_TPR0_TWR_OFFSET) |
+		      (9 << ATMEL_MPDDRC_TPR0_TRC_OFFSET) |
+		      (3 << ATMEL_MPDDRC_TPR0_TRP_OFFSET) |
+		      (4 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET) |
+		      (4 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET) |
+		      (2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET));
+
+	ddrc->tpr1 = ((22 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET) |
+		      (23 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET) |
+		      (200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET) |
+		      (3 << ATMEL_MPDDRC_TPR1_TXP_OFFSET));
+
+	ddrc->tpr2 = ((2 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET) |
+		      (8 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET) |
+		      (4 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET) |
+		      (4 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET) |
+		      (8 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET));
+}
+
+void mem_init(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	struct atmel_mpddr *mpddrc = (struct atmel_mpddr *)ATMEL_BASE_MPDDRC;
+	struct atmel_mpddrc_config ddrc_config;
+	u32 reg;
+
+	ddrc_conf(&ddrc_config);
+
+	at91_periph_clk_enable(ATMEL_ID_MPDDRC);
+	writel(AT91_PMC_DDR, &pmc->scer);
+
+	reg = readl(&mpddrc->io_calibr);
+	reg &= ~ATMEL_MPDDRC_IO_CALIBR_RDIV;
+	reg |= ATMEL_MPDDRC_IO_CALIBR_DDR3_RZQ_55;
+	reg &= ~ATMEL_MPDDRC_IO_CALIBR_TZQIO;
+	reg |= ATMEL_MPDDRC_IO_CALIBR_TZQIO_(101);
+	writel(reg, &mpddrc->io_calibr);
+
+	writel(ATMEL_MPDDRC_RD_DATA_PATH_SHIFT_ONE_CYCLE,
+	       &mpddrc->rd_data_path);
+
+	ddr3_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddrc_config);
+
+	writel(0x3, &mpddrc->cal_mr4);
+	writel(64, &mpddrc->tim_cal);
+}
+
+void at91_pmc_init(void)
+{
+	u32 tmp;
+
+	/*
+	 * While coming from the ROM code, we run on PLLA @ 492 MHz / 164 MHz,
+	 * so we need to slow down and configure MCKR accordingly.
+	 * This is why we have a special flavor of the switching function.
+	 */
+	tmp = AT91_PMC_MCKR_PLLADIV_2 |
+	      AT91_PMC_MCKR_MDIV_3 |
+	      AT91_PMC_MCKR_CSS_MAIN;
+	at91_mck_init_down(tmp);
+
+	tmp = AT91_PMC_PLLAR_29 |
+	      AT91_PMC_PLLXR_PLLCOUNT(0x3f) |
+	      AT91_PMC_PLLXR_MUL(40) |
+	      AT91_PMC_PLLXR_DIV(1);
+	at91_plla_init(tmp);
+
+	tmp = AT91_PMC_MCKR_H32MXDIV |
+	      AT91_PMC_MCKR_PLLADIV_2 |
+	      AT91_PMC_MCKR_MDIV_3 |
+	      AT91_PMC_MCKR_CSS_PLLA;
+	at91_mck_init(tmp);
+}
+#endif