AT91: add TOP9000 support

Adds support for the EMK TOP9000 CPU Module which is
based on ATMELs ARM926EJS AT91SAM9XE SoC.

Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>

3 files changed, 405 insertions, 0 deletions

diff --git a/board/emk/top9000/Makefile b/board/emk/top9000/Makefile
new file mode 100644
index 0000000000..9b280482a9
--- /dev/null
+++ b/board/emk/top9000/Makefile
@@ -0,0 +1,54 @@
+#
+# (C) Copyright 2003-2008
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2010
+# Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
+#
+# 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	+= top9000.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/emk/top9000/spi.c b/board/emk/top9000/spi.c
new file mode 100644
index 0000000000..b4689483ac
--- /dev/null
+++ b/board/emk/top9000/spi.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2010
+ * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
+ *
+ * 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>
+
+static const struct {
+	u32	port;
+	u32	bit;
+} cs_to_portbit[2][4] = {
+	{{AT91_PIO_PORTA,  3}, {AT91_PIO_PORTC, 11},
+			{AT91_PIO_PORTC, 16}, {AT91_PIO_PORTC, 17} },
+	{{AT91_PIO_PORTB,  3}, {AT91_PIO_PORTC,  5},
+			{AT91_PIO_PORTC,  4}, {AT91_PIO_PORTC,  3} }
+};
+
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+	debug("spi_cs_is_valid: bus=%u cs=%u\n", bus, cs);
+	if (bus < 2 && cs < 4)
+		return 1;
+	return 0;
+}
+
+void spi_cs_activate(struct spi_slave *slave)
+{
+	debug("spi_cs_activate: bus=%u cs=%u\n", slave->bus, slave->cs);
+	at91_set_pio_output(cs_to_portbit[slave->bus][slave->cs].port,
+		cs_to_portbit[slave->bus][slave->cs].bit, 0);
+}
+
+void spi_cs_deactivate(struct spi_slave *slave)
+{
+	debug("spi_cs_deactivate: bus=%u cs=%u\n", slave->bus, slave->cs);
+	at91_set_pio_output(cs_to_portbit[slave->bus][slave->cs].port,
+		cs_to_portbit[slave->bus][slave->cs].bit, 1);
+}
+
diff --git a/board/emk/top9000/top9000.c b/board/emk/top9000/top9000.c
new file mode 100644
index 0000000000..b0fe2d68a8
--- /dev/null
+++ b/board/emk/top9000/top9000.c
@@ -0,0 +1,290 @@
+/*
+ * (C) Copyright 2007-2008
+ * Stelian Pop <stelian.pop@leadtechdesign.com>
+ * Lead Tech Design <www.leadtechdesign.com>
+ *
+ * (C) Copyright 2010
+ * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
+ *
+ * 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 <net.h>
+#include <netdev.h>
+#include <mmc.h>
+#include <i2c.h>
+#include <spi.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/at91_shdwn.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/io.h>
+#include <asm/arch/hardware.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_CMD_NAND
+static void 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 |
+		AT91_SMC_DBW_8 |
+		AT91_SMC_TDF_(2));
+
+	/* 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 macb_hw_init(void)
+{
+	/* Enable EMAC clock */
+	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_EMAC);
+
+	/* Initialize EMAC=MACB hardware */
+	at91_macb_hw_init();
+}
+#endif
+
+#ifdef CONFIG_GENERIC_ATMEL_MCI
+/* this is a weak define that we are overriding */
+int board_mmc_init(bd_t *bd)
+{
+	/* Enable MCI clock */
+	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_MCI);
+
+	/* Initialize MCI hardware */
+	at91_mci_hw_init();
+
+	/* This calls the atmel_mmc_init in gen_atmel_mci.c */
+	return atmel_mci_init((void *)AT91_BASE_MCI);
+}
+
+/* this is a weak define that we are overriding */
+int board_mmc_getcd(u8 *cd, struct mmc *mmc)
+{
+	/*
+	 * the only currently existing use of this function
+	 * (fsl_esdhc.c) suggests this function must return
+	 * *cs = TRUE if a card is NOT detected -> in most
+	 * cases the value of the pin when the detect switch
+	 * closes to GND
+	 */
+	*cd = at91_get_gpio_value(CONFIG_SYS_MMC_CD_PIN) ? 1 : 0;
+	return 0;
+}
+
+#endif
+
+int board_early_init_f(void)
+{
+	at91_shdwn_t *shdwn = (at91_shdwn_t *)AT91_SHDWN_BASE;
+
+	/*
+	 * make sure the board can be powered on by
+	 * any transition on WKUP
+	 */
+	writel(AT91_SHDW_MR_WKMODE0H2L | AT91_SHDW_MR_WKMODE0L2H,
+		&shdwn->mr);
+
+	/* Enable clocks for all PIOs */
+	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_PIOA);
+	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_PIOB);
+	at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9260_ID_PIOC);
+
+	/* set SCL0 and SDA0 to open drain */
+	at91_set_pio_output(I2C0_PORT, SCL0_PIN, 1);
+	at91_set_pio_multi_drive(I2C0_PORT, SCL0_PIN, 1);
+	at91_set_pio_pullup(I2C0_PORT, SCL0_PIN, 1);
+	at91_set_pio_output(I2C0_PORT, SDA0_PIN, 1);
+	at91_set_pio_multi_drive(I2C0_PORT, SDA0_PIN, 1);
+	at91_set_pio_pullup(I2C0_PORT, SDA0_PIN, 1);
+
+	/* set SCL1 and SDA1 to open drain */
+	at91_set_pio_output(I2C1_PORT, SCL1_PIN, 1);
+	at91_set_pio_multi_drive(I2C1_PORT, SCL1_PIN, 1);
+	at91_set_pio_pullup(I2C1_PORT, SCL1_PIN, 1);
+	at91_set_pio_output(I2C1_PORT, SDA1_PIN, 1);
+	at91_set_pio_multi_drive(I2C1_PORT, SDA1_PIN, 1);
+	at91_set_pio_pullup(I2C1_PORT, SDA1_PIN, 1);
+	return 0;
+}
+
+int board_init(void)
+{
+	/* arch number of TOP9000 Board */
+	gd->bd->bi_arch_number = MACH_TYPE_TOP9000;
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+	at91_serial_hw_init();
+#ifdef CONFIG_CMD_NAND
+	nand_hw_init();
+#endif
+#ifdef CONFIG_MACB
+	macb_hw_init();
+#endif
+#ifdef CONFIG_ATMEL_SPI0
+	/* (n+4) denotes to use nSPISEL(0) in GPIO mode! */
+	at91_spi0_hw_init(1 << (FRAM_CS_NUM + 4));
+#endif
+#ifdef CONFIG_ATMEL_SPI1
+	at91_spi1_hw_init(1 << (ENC_CS_NUM + 4));
+#endif
+	return 0;
+}
+
+#ifdef CONFIG_MISC_INIT_R
+int misc_init_r(void)
+{
+	/* read 'factory' part of EEPROM */
+	read_factory_r();
+	return 0;
+}
+#endif
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size(
+		(void *)CONFIG_SYS_SDRAM_BASE,
+		CONFIG_SYS_SDRAM_SIZE);
+	return 0;
+}
+
+#ifdef CONFIG_RESET_PHY_R
+void reset_phy(void)
+{
+	/*
+	 * Initialize ethernet HW addresses prior to starting Linux,
+	 * needed for nfsroot.
+	 * TODO: We need to investigate if that is really necessary.
+	 */
+	eth_init(gd->bd);
+}
+#endif
+
+int board_eth_init(bd_t *bis)
+{
+	int rc = 0;
+	int num = 0;
+#ifdef CONFIG_MACB
+	rc = macb_eth_initialize(0,
+		(void *)AT91_EMAC_BASE,
+		CONFIG_SYS_PHY_ID);
+	if (!rc)
+		num++;
+#endif
+#ifdef CONFIG_ENC28J60
+	rc = enc28j60_initialize(ENC_SPI_BUS, ENC_CS_NUM,
+		ENC_SPI_CLOCK, SPI_MODE_0);
+	if (!rc)
+		num++;
+# ifdef CONFIG_ENC28J60_2
+	rc = enc28j60_initialize(ENC_SPI_BUS, ENC_CS_NUM+1,
+		ENC_SPI_CLOCK, SPI_MODE_0);
+	if (!rc)
+		num++;
+#  ifdef CONFIG_ENC28J60_3
+	rc = enc28j60_initialize(ENC_SPI_BUS, ENC_CS_NUM+2,
+		ENC_SPI_CLOCK, SPI_MODE_0);
+	if (!rc)
+		num++;
+#  endif
+# endif
+#endif
+	return num;
+}
+
+/*
+ * I2C access functions
+ *
+ * Note:
+ * We need to access Bus 0 before relocation to access the
+ * environment settings.
+ * However i2c_get_bus_num() cannot be called before
+ * relocation.
+ */
+#ifdef CONFIG_SOFT_I2C
+void iic_init(void)
+{
+	/* ports are now initialized in board_early_init_f() */
+}
+
+int iic_read(void)
+{
+	switch ((gd->flags & GD_FLG_RELOC) ? i2c_get_bus_num() : 0) {
+	case 0:
+		return at91_get_pio_value(I2C0_PORT, SDA0_PIN);
+	case 1:
+		return at91_get_pio_value(I2C1_PORT, SDA1_PIN);
+	}
+	return 1;
+}
+
+void iic_sda(int bit)
+{
+	switch ((gd->flags & GD_FLG_RELOC) ? i2c_get_bus_num() : 0) {
+	case 0:
+		at91_set_pio_value(I2C0_PORT, SDA0_PIN, bit);
+		break;
+	case 1:
+		at91_set_pio_value(I2C1_PORT, SDA1_PIN, bit);
+		break;
+	}
+}
+
+void iic_scl(int bit)
+{
+	switch ((gd->flags & GD_FLG_RELOC) ? i2c_get_bus_num() : 0) {
+	case 0:
+		at91_set_pio_value(I2C0_PORT, SCL0_PIN, bit);
+		break;
+	case 1:
+		at91_set_pio_value(I2C1_PORT, SCL1_PIN, bit);
+		break;
+	}
+}
+
+#endif