Add support for the Calao SBC35-A9G20 board

The Calao SBC35-A9G20 board is manufactured and sold by Calao Systems
<http://www.calao-systems.com>. It is built around an AT91SAM9G20 ARM SoC
running at 400MHz. It features an Ethernet port, an SPI RTC backed by an onboard
battery , an SD/MMC slot, a CompactFlash slot, 64Mo of SDRAM, 256Mo of NAND
flash, two USB host ports, and an USB device port. More informations can be
found at <http://www.calao-systems.com/articles.php?lng=en&pg=5936>

Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com>

4 files changed, 310 insertions, 0 deletions

diff --git a/board/calao/sbc35_a9g20/Makefile b/board/calao/sbc35_a9g20/Makefile
new file mode 100644
index 0000000000..8b4a9116b2
--- /dev/null
+++ b/board/calao/sbc35_a9g20/Makefile
@@ -0,0 +1,55 @@
+#
+# (C) Copyright 2003-2008
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2008
+# Stelian Pop <stelian.pop@leadtechdesign.com>
+# Lead Tech Design <www.leadtechdesign.com>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(BOARD).a
+
+COBJS-y	+= sbc35_a9g20.o
+COBJS-$(CONFIG_ATMEL_SPI)	+= spi.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS-y))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS) $(SOBJS)
+
+clean:
+	rm -f $(SOBJS) $(OBJS)
+
+distclean:	clean
+	rm -f $(LIB) core *.bak $(obj).depend
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/calao/sbc35_a9g20/config.mk b/board/calao/sbc35_a9g20/config.mk
new file mode 100644
index 0000000000..ff2cfd170b
--- /dev/null
+++ b/board/calao/sbc35_a9g20/config.mk
@@ -0,0 +1 @@
+TEXT_BASE = 0x23f00000
diff --git a/board/calao/sbc35_a9g20/sbc35_a9g20.c b/board/calao/sbc35_a9g20/sbc35_a9g20.c
new file mode 100644
index 0000000000..da34b40e50
--- /dev/null
+++ b/board/calao/sbc35_a9g20/sbc35_a9g20.c
@@ -0,0 +1,197 @@
+/*
+ * (C) Copyright 2007-2008
+ * Stelian Pop <stelian.pop@leadtechdesign.com>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * Copyright (C) 2009
+ * Albin Tonnerre, Free-Electrons <albin.tonnerre@free-electrons.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/at91sam9260.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_rstc.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/io.h>
+#include <asm/arch/hardware.h>
+#if defined(CONFIG_RESET_PHY_R) && defined(CONFIG_MACB)
+#include <net.h>
+#endif
+#include <netdev.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* ------------------------------------------------------------------------- */
+/*
+ * Miscelaneous platform dependent initialisations
+ */
+
+#ifdef CONFIG_CMD_NAND
+static void sbc35_a9g20_nand_hw_init(void)
+{
+	unsigned long csa;
+
+	/* Enable CS3 */
+	csa = at91_sys_read(AT91_MATRIX_EBICSA);
+	at91_sys_write(AT91_MATRIX_EBICSA,
+		       csa | AT91_MATRIX_CS3A_SMC_SMARTMEDIA);
+
+	/* Configure SMC CS3 for NAND/SmartMedia */
+	at91_sys_write(AT91_SMC_SETUP(3),
+		       AT91_SMC_NWESETUP_(1) | AT91_SMC_NCS_WRSETUP_(0) |
+		       AT91_SMC_NRDSETUP_(1) | AT91_SMC_NCS_RDSETUP_(0));
+	at91_sys_write(AT91_SMC_PULSE(3),
+		       AT91_SMC_NWEPULSE_(3) | AT91_SMC_NCS_WRPULSE_(3) |
+		       AT91_SMC_NRDPULSE_(3) | AT91_SMC_NCS_RDPULSE_(3));
+	at91_sys_write(AT91_SMC_CYCLE(3),
+		       AT91_SMC_NWECYCLE_(5) | AT91_SMC_NRDCYCLE_(5));
+	at91_sys_write(AT91_SMC_MODE(3),
+		       AT91_SMC_READMODE | AT91_SMC_WRITEMODE |
+		       AT91_SMC_EXNWMODE_DISABLE |
+#ifdef CONFIG_SYS_NAND_DBW_16
+		       AT91_SMC_DBW_16 |
+#else /* CONFIG_SYS_NAND_DBW_8 */
+		       AT91_SMC_DBW_8 |
+#endif
+		       AT91_SMC_TDF_(2));
+
+	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_PIOC);
+
+	/* 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);
+}
+#endif
+
+#ifdef CONFIG_MACB
+static void sbc35_a9g20_macb_hw_init(void)
+{
+	unsigned long rstc;
+
+	/* Enable clock */
+	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_EMAC);
+
+	/*
+	 * 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),
+	       pin_to_controller(AT91_PIN_PA0) + PIO_PUDR);
+
+	rstc = at91_sys_read(AT91_RSTC_MR) & AT91_RSTC_ERSTL;
+
+	/* Need to reset PHY -> 500ms reset */
+	at91_sys_write(AT91_RSTC_MR, AT91_RSTC_KEY |
+				     (AT91_RSTC_ERSTL & (0x0D << 8)) |
+				     AT91_RSTC_URSTEN);
+
+	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_EXTRST);
+
+	/* Wait for end hardware reset */
+	while (!(at91_sys_read(AT91_RSTC_SR) & AT91_RSTC_NRSTL));
+
+	/* Restore NRST value */
+	at91_sys_write(AT91_RSTC_MR, AT91_RSTC_KEY |
+				     (rstc) |
+				     AT91_RSTC_URSTEN);
+
+	/* 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),
+	       pin_to_controller(AT91_PIN_PA0) + PIO_PUER);
+
+	at91_macb_hw_init();
+}
+#endif
+
+int board_init(void)
+{
+	/* Enable Ctrlc */
+	console_init_f();
+
+	gd->bd->bi_arch_number = MACH_TYPE_SBC35_A9G20;
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+
+	at91_serial_hw_init();
+	sbc35_a9g20_nand_hw_init();
+#ifdef CONFIG_ATMEL_SPI
+	at91_spi0_hw_init(1 << 4 | 1 << 5);
+#endif
+#ifdef CONFIG_MACB
+	sbc35_a9g20_macb_hw_init();
+#endif
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM;
+	if(get_ram_size((long *) PHYS_SDRAM, PHYS_SDRAM_SIZE) != PHYS_SDRAM_SIZE)
+		return -1;
+
+	gd->bd->bi_dram[0].size = PHYS_SDRAM_SIZE;
+	return 0;
+}
+
+#ifdef CONFIG_RESET_PHY_R
+void reset_phy(void)
+{
+#ifdef CONFIG_MACB
+	/*
+	 * Initialize ethernet HW addr prior to starting Linux,
+	 * needed for nfsroot
+	 */
+	eth_init(gd->bd);
+#endif
+}
+#endif
+
+int board_eth_init(bd_t *bis)
+{
+	int rc = 0;
+#ifdef CONFIG_MACB
+	rc = macb_eth_initialize(0, (void *)AT91SAM9260_BASE_EMAC, 0x00);
+#endif
+	return rc;
+}
diff --git a/board/calao/sbc35_a9g20/spi.c b/board/calao/sbc35_a9g20/spi.c
new file mode 100644
index 0000000000..1057fa2e99
--- /dev/null
+++ b/board/calao/sbc35_a9g20/spi.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2009
+ * Albin Tonnerre, Free Electrons <albin.tonnerre@free-electrons.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_spi.h>
+#include <asm/arch/gpio.h>
+#include <spi.h>
+
+#define SBC_A9260_CS0_PIN	AT91_PIN_PA3
+#define SBC_A9260_CS1_PIN	AT91_PIN_PC11
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	return bus == 0 && (cs == 1 || cs == 0);
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+	if(slave->cs == 0)
+		at91_set_gpio_value(SBC_A9260_CS0_PIN, 0);
+	else if(slave->cs == 1)
+		at91_set_gpio_value(SBC_A9260_CS1_PIN, 0);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+	if(slave->cs == 0)
+		at91_set_gpio_value(SBC_A9260_CS0_PIN, 1);
+	else if(slave->cs == 1)
+		at91_set_gpio_value(SBC_A9260_CS1_PIN, 1);
+}
+
+void spi_init_f(void)
+{
+	/* everything done in board_init */
+}