arm, at91: support for sam9260 based smartweb board

add support for the at91sam9260 based board smartweb from
siemens. SPL is used without serial support, as this
SoC has only 4k sram for running SPL. Here a U-Boot
bootlog:

RomBOOT
>

U-Boot 2015.07-rc2-00109-g4ae828c (Jun 15 2015 - 09:31:16 +0200)

CPU: AT91SAM9260
Crystal frequency:   18.432 MHz
CPU clock        :  198.656 MHz
Master clock     :   99.328 MHz
       Watchdog enabled
DRAM:  64 MiB
WARNING: Caches not enabled
NAND:  256 MiB
In:    serial
Out:   serial
Err:   serial
Net:   macb0
Hit any key to stop autoboot:  0
U-Boot>

Signed-off-by: Heiko Schocher <hs@denx.de>

4 files changed, 258 insertions, 0 deletions

diff --git a/board/siemens/smartweb/Kconfig b/board/siemens/smartweb/Kconfig
new file mode 100644
index 0000000000..0871bcc32a
--- /dev/null
+++ b/board/siemens/smartweb/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_SMARTWEB
+
+config SYS_BOARD
+	default "smartweb"
+
+config SYS_VENDOR
+	default "siemens"
+
+config SYS_CONFIG_NAME
+	default "smartweb"
+
+endif
diff --git a/board/siemens/smartweb/MAINTAINERS b/board/siemens/smartweb/MAINTAINERS
new file mode 100644
index 0000000000..51298ffb5d
--- /dev/null
+++ b/board/siemens/smartweb/MAINTAINERS
@@ -0,0 +1,6 @@
+SMARTWEB_HW BOARD
+M:	Heiko Schocher <hs@denx.de>
+S:	Maintained
+F:	board/siemens/smartweb
+F:	include/configs/smartweb.h
+F:	configs/smartweb_defconfig
diff --git a/board/siemens/smartweb/Makefile b/board/siemens/smartweb/Makefile
new file mode 100644
index 0000000000..55e7798d12
--- /dev/null
+++ b/board/siemens/smartweb/Makefile
@@ -0,0 +1,20 @@
+#
+# (C) Copyright 2003-2008
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2008
+# Stelian Pop <stelian@popies.net>
+# Lead Tech Design <www.leadtechdesign.com>
+#
+# (C) Copyright 2012
+# Markus Hubig <mhubig@imko.de>
+# IMKO GmbH <www.imko.de>
+#
+# (C) Copyright 2014
+# Heiko Schocher <hs@denx.de>
+# DENX Software Engineering GmbH
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= smartweb.o
diff --git a/board/siemens/smartweb/smartweb.c b/board/siemens/smartweb/smartweb.c
new file mode 100644
index 0000000000..cf8a7f5b06
--- /dev/null
+++ b/board/siemens/smartweb/smartweb.c
@@ -0,0 +1,220 @@
+/*
+ * (C) Copyright 2007-2008
+ * Stelian Pop <stelian@popies.net>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * Achim Ehrlich <aehrlich@taskit.de>
+ * taskit GmbH <www.taskit.de>
+ *
+ * (C) Copyright 2012-
+ * Markus Hubig <mhubig@imko.de>
+ * IMKO GmbH <www.imko.de>
+ * (C) Copyright 2014
+ * Heiko Schocher <hs@denx.de>
+ * DENX Software Engineering GmbH
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/at91sam9_sdramc.h>
+#include <asm/arch/at91sam9260_matrix.h>
+#include <asm/arch/at91sam9_smc.h>
+#include <asm/arch/at91_common.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_spi.h>
+#include <spi.h>
+#include <asm/arch/gpio.h>
+#include <watchdog.h>
+#ifdef CONFIG_MACB
+# include <net.h>
+# include <netdev.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void smartweb_nand_hw_init(void)
+{
+	struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
+	struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+	unsigned long csa;
+
+	/* Assign CS3 to NAND/SmartMedia Interface */
+	csa = readl(&matrix->ebicsa);
+	csa |= AT91_MATRIX_CS3A_SMC_SMARTMEDIA;
+	writel(csa, &matrix->ebicsa);
+
+	/* Configure SMC CS3 for NAND/SmartMedia */
+	writel(AT91_SMC_SETUP_NWE(1) | AT91_SMC_SETUP_NCS_WR(0) |
+		AT91_SMC_SETUP_NRD(1) | AT91_SMC_SETUP_NCS_RD(0),
+		&smc->cs[3].setup);
+	writel(AT91_SMC_PULSE_NWE(3) | AT91_SMC_PULSE_NCS_WR(3) |
+		AT91_SMC_PULSE_NRD(3) | AT91_SMC_PULSE_NCS_RD(3),
+		&smc->cs[3].pulse);
+	writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(5),
+	       &smc->cs[3].cycle);
+	writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
+		AT91_SMC_MODE_TDF_CYCLE(2),
+		&smc->cs[3].mode);
+
+	/* Configure RDY/BSY */
+	at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
+
+	/* Enable NandFlash */
+	at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
+}
+
+#ifdef CONFIG_MACB
+static void smartweb_macb_hw_init(void)
+{
+	struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
+
+	/* Enable the PHY Chip via PA26 on the Stamp 2 Adaptor */
+	at91_set_gpio_output(AT91_PIN_PA26, 0);
+
+	/*
+	 * Disable pull-up on:
+	 *	RXDV (PA17) => PHY normal mode (not Test mode)
+	 *	ERX0 (PA14) => PHY ADDR0
+	 *	ERX1 (PA15) => PHY ADDR1
+	 *	ERX2 (PA25) => PHY ADDR2
+	 *	ERX3 (PA26) => PHY ADDR3
+	 *	ECRS (PA28) => PHY ADDR4  => PHYADDR = 0x0
+	 *
+	 * PHY has internal pull-down
+	 */
+	writel(pin_to_mask(AT91_PIN_PA14) |
+		pin_to_mask(AT91_PIN_PA15) |
+		pin_to_mask(AT91_PIN_PA17) |
+		pin_to_mask(AT91_PIN_PA25) |
+		pin_to_mask(AT91_PIN_PA26) |
+		pin_to_mask(AT91_PIN_PA28),
+		&pioa->pudr);
+
+	at91_phy_reset();
+
+	/* Re-enable pull-up */
+	writel(pin_to_mask(AT91_PIN_PA14) |
+		pin_to_mask(AT91_PIN_PA15) |
+		pin_to_mask(AT91_PIN_PA17) |
+		pin_to_mask(AT91_PIN_PA25) |
+		pin_to_mask(AT91_PIN_PA26) |
+		pin_to_mask(AT91_PIN_PA28),
+		&pioa->puer);
+
+	/* Initialize EMAC=MACB hardware */
+	at91_macb_hw_init();
+}
+#endif /* CONFIG_MACB */
+
+int board_early_init_f(void)
+{
+	/* enable this here, as we have SPL without serial support */
+	at91_seriald_hw_init();
+	return 0;
+}
+
+int board_init(void)
+{
+	/* Adress of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+	smartweb_nand_hw_init();
+#ifdef CONFIG_MACB
+	smartweb_macb_hw_init();
+#endif
+	/* power LED red */
+	at91_set_gpio_output(AT91_PIN_PC6, 0);
+	at91_set_gpio_output(AT91_PIN_PC7, 1);
+	/* alarm LED off */
+	at91_set_gpio_output(AT91_PIN_PC8, 0);
+	at91_set_gpio_output(AT91_PIN_PC9, 0);
+	/* prog LED red */
+	at91_set_gpio_output(AT91_PIN_PC10, 0);
+	at91_set_gpio_output(AT91_PIN_PC11, 1);
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size(
+		(void *)CONFIG_SYS_SDRAM_BASE,
+		CONFIG_SYS_SDRAM_SIZE);
+	return 0;
+}
+
+#ifdef CONFIG_MACB
+int board_eth_init(bd_t *bis)
+{
+	return macb_eth_initialize(0, (void *)ATMEL_BASE_EMAC0, 0x00);
+}
+#endif /* CONFIG_MACB */
+
+#if defined(CONFIG_SPL_BUILD)
+#include <spl.h>
+#include <nand.h>
+#include <spi_flash.h>
+
+void matrix_init(void)
+{
+	struct at91_matrix *mat = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+
+	writel((readl(&mat->scfg[3]) & (~AT91_MATRIX_SLOT_CYCLE))
+			| AT91_MATRIX_SLOT_CYCLE_(0x40),
+			&mat->scfg[3]);
+}
+
+void spl_board_init(void)
+{
+	at91_set_gpio_output(AT91_PIN_PC6, 1);
+	at91_set_gpio_output(AT91_PIN_PC7, 1);
+	/* alarm LED orange */
+	at91_set_gpio_output(AT91_PIN_PC8, 1);
+	at91_set_gpio_output(AT91_PIN_PC9, 1);
+	/* prog LED red */
+	at91_set_gpio_output(AT91_PIN_PC10, 0);
+	at91_set_gpio_output(AT91_PIN_PC11, 1);
+
+	smartweb_nand_hw_init();
+	at91_set_gpio_input(AT91_PIN_PA28, 1);
+	at91_set_gpio_input(AT91_PIN_PA29, 1);
+
+	/* check if both  button are pressed */
+	if (at91_get_gpio_value(AT91_PIN_PA28) == 0 &&
+	    at91_get_gpio_value(AT91_PIN_PA29) == 0) {
+		debug("Recovery button pressed\n");
+		nand_init();
+		spl_nand_erase_one(0, 0);
+	}
+}
+
+#define SDRAM_BASE_CONF	(AT91_SDRAMC_NC_9 | AT91_SDRAMC_NR_13 \
+			 | AT91_SDRAMC_CAS_2 \
+			 | AT91_SDRAMC_NB_4 | AT91_SDRAMC_DBW_32 \
+			 | AT91_SDRAMC_TWR_VAL(2) | AT91_SDRAMC_TRC_VAL(7) \
+			 | AT91_SDRAMC_TRP_VAL(2) | AT91_SDRAMC_TRCD_VAL(2) \
+			 | AT91_SDRAMC_TRAS_VAL(5) | AT91_SDRAMC_TXSR_VAL(8))
+
+void mem_init(void)
+{
+	struct at91_matrix *ma = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+	struct at91_port *port = (struct at91_port *)ATMEL_BASE_PIOC;
+	struct sdramc_reg setting;
+
+	setting.cr = SDRAM_BASE_CONF;
+	setting.mdr = AT91_SDRAMC_MD_SDRAM;
+	setting.tr = (CONFIG_SYS_MASTER_CLOCK * 7) / 1000000;
+
+	/*
+	 * I write here directly in this register, because this
+	 * approach is smaller than calling at91_set_a_periph() in a
+	 * for loop. This saved me 96 bytes.
+	 */
+	writel(0xffff0000, &port->pdr);
+
+	writel(readl(&ma->ebicsa) | AT91_MATRIX_CS1A_SDRAMC, &ma->ebicsa);
+	sdramc_initialize(ATMEL_BASE_CS1, &setting);
+}
+#endif