MX35: add support for woodburn board

The woodburn board is based on the MX35 SOC.
Support for both external (NOR) and internal
(SD Card) boot mode are added. It uses the
generic SPL framework to implement the internal boot
mode.

The following peripherals are supported:
- Ethernet (FEC)
- SD Card
- NAND (512 MB)
- NOR Flash

In the internal boot mode, a simple imximage header
is generated to set the address in internal RAM
where the SOC must copy the SPL code. The initial setup
is then demanded to the SPL itself.

Signed-off-by: Stefano Babic <sbabic@denx.de>

4 files changed, 346 insertions, 0 deletions

diff --git a/board/woodburn/Makefile b/board/woodburn/Makefile
new file mode 100644
index 0000000..b60163f
--- /dev/null
+++ b/board/woodburn/Makefile
@@ -0,0 +1,43 @@
+#
+# Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
+#
+# (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
+#
+# 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).o
+
+COBJS	:= woodburn.o
+SOBJS	:= lowlevel_init.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
+	$(call cmd_link_o_target, $(OBJS) $(SOBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/woodburn/imximage.cfg b/board/woodburn/imximage.cfg
new file mode 100644
index 0000000..b4cc8ec
--- /dev/null
+++ b/board/woodburn/imximage.cfg
@@ -0,0 +1,4 @@
+BOOT_FROM      sd
+
+# DDR2 init
+DATA 4 0xB8001010 0x00000304
diff --git a/board/woodburn/lowlevel_init.S b/board/woodburn/lowlevel_init.S
new file mode 100644
index 0000000..57fb1b1
--- /dev/null
+++ b/board/woodburn/lowlevel_init.S
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
+ *
+ * (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
+ *
+ * Copyright (C) 2011, Stefano Babic <sbabic@denx.de>
+ *
+ * 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 <config.h>
+#include <asm/arch/lowlevel_macro.S>
+
+.globl lowlevel_init
+lowlevel_init:
+
+	core_init
+
+	init_aips
+
+	init_max
+
+	init_m3if
+
+	mov pc, lr
diff --git a/board/woodburn/woodburn.c b/board/woodburn/woodburn.c
new file mode 100644
index 0000000..286749f
--- /dev/null
+++ b/board/woodburn/woodburn.c
@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2012, Stefano Babic <sbabic@denx.de>
+ *
+ * Based on flea3.c and mx35pdk.c
+ *
+ * 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/io.h>
+#include <asm/errno.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/mx35_pins.h>
+#include <asm/arch/iomux.h>
+#include <i2c.h>
+#include <pmic.h>
+#include <fsl_pmic.h>
+#include <mc13892.h>
+#include <mmc.h>
+#include <fsl_esdhc.h>
+#include <linux/types.h>
+#include <asm/gpio.h>
+#include <asm/arch/sys_proto.h>
+#include <netdev.h>
+#include <spl.h>
+
+#define CCM_CCMR_CONFIG		0x003F4208
+
+#define ESDCTL_DDR2_CONFIG	0x007FFC3F
+
+/* For MMC */
+#define GPIO_MMC_CD	7
+#define GPIO_MMC_WP	8
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1,
+		PHYS_SDRAM_1_SIZE);
+
+	return 0;
+}
+
+static void board_setup_sdram(void)
+{
+	struct esdc_regs *esdc = (struct esdc_regs *)ESDCTL_BASE_ADDR;
+
+	/* Initialize with default values both CSD0/1 */
+	writel(0x2000, &esdc->esdctl0);
+	writel(0x2000, &esdc->esdctl1);
+
+	mx3_setup_sdram_bank(CSD0_BASE_ADDR, ESDCTL_DDR2_CONFIG,
+		 13, 10, 2, 0x8080);
+}
+
+static void setup_iomux_fec(void)
+{
+	/* setup pins for FEC */
+	mxc_request_iomux(MX35_PIN_FEC_TX_CLK, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_RX_CLK, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_RX_DV, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_COL, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_RDATA0, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_TDATA0, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_TX_EN, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_MDC, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_MDIO, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_TX_ERR, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_RX_ERR, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_CRS, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_RDATA1, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_TDATA1, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_RDATA2, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_TDATA2, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_RDATA3, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_FEC_TDATA3, MUX_CONFIG_FUNC);
+}
+
+int woodburn_init(void)
+{
+	struct ccm_regs *ccm =
+		(struct ccm_regs *)IMX_CCM_BASE;
+
+	/* initialize PLL and clock configuration */
+	writel(CCM_CCMR_CONFIG, &ccm->ccmr);
+
+	/* Set-up RAM */
+	board_setup_sdram();
+
+	/* enable clocks */
+	writel(readl(&ccm->cgr0) |
+		MXC_CCM_CGR0_EMI_MASK |
+		MXC_CCM_CGR0_EDIO_MASK |
+		MXC_CCM_CGR0_EPIT1_MASK,
+		&ccm->cgr0);
+
+	writel(readl(&ccm->cgr1) |
+		MXC_CCM_CGR1_FEC_MASK |
+		MXC_CCM_CGR1_GPIO1_MASK |
+		MXC_CCM_CGR1_GPIO2_MASK |
+		MXC_CCM_CGR1_GPIO3_MASK |
+		MXC_CCM_CGR1_I2C1_MASK |
+		MXC_CCM_CGR1_I2C2_MASK |
+		MXC_CCM_CGR1_I2C3_MASK,
+		&ccm->cgr1);
+
+	/* Set-up NAND */
+	__raw_writel(readl(&ccm->rcsr) | MXC_CCM_RCSR_NFC_FMS, &ccm->rcsr);
+
+	/* Set pinmux for the required peripherals */
+	setup_iomux_fec();
+
+	/* setup GPIO1_4 FEC_ENABLE signal */
+	mxc_request_iomux(MX35_PIN_SCKR, MUX_CONFIG_ALT5);
+	gpio_direction_output(4, 1);
+	mxc_request_iomux(MX35_PIN_HCKT, MUX_CONFIG_ALT5);
+	gpio_direction_output(9, 0);
+	gpio_set_value(9, 1);
+
+	return 0;
+}
+
+#if defined(CONFIG_SPL_BUILD)
+void board_init_f(ulong dummy)
+{
+	/* Set the stack pointer. */
+	asm volatile("mov sp, %0\n" : : "r"(CONFIG_SPL_STACK));
+
+	/* Initialize MUX and SDRAM */
+	woodburn_init();
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end__ - __bss_start);
+
+	/* Set global data pointer. */
+	gd = &gdata;
+
+	preloader_console_init();
+	timer_init();
+
+	board_init_r(NULL, 0);
+}
+
+void spl_board_init(void)
+{
+}
+
+#endif
+
+
+/* Booting from NOR in external mode */
+int board_early_init_f(void)
+{
+	return woodburn_init();
+}
+
+
+int board_init(void)
+{
+	struct pmic *p;
+	u32 val;
+
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+
+	pmic_init();
+	p = get_pmic();
+
+	/*
+	 * Set switchers in Auto in NORMAL mode & STANDBY mode
+	 * Setup the switcher mode for SW1 & SW2
+	 */
+	pmic_reg_read(p, REG_SW_4, &val);
+	val = (val & ~((SWMODE_MASK << SWMODE1_SHIFT) |
+		(SWMODE_MASK << SWMODE2_SHIFT)));
+	val |= (SWMODE_AUTO_AUTO << SWMODE1_SHIFT) |
+		(SWMODE_AUTO_AUTO << SWMODE2_SHIFT);
+	/* Set SWILIMB */
+	val |= (1 << 22);
+	pmic_reg_write(p, REG_SW_4, val);
+
+	/* Setup the switcher mode for SW3 & SW4 */
+	pmic_reg_read(p, REG_SW_5, &val);
+	val &= ~((SWMODE_MASK << SWMODE4_SHIFT) |
+		(SWMODE_MASK << SWMODE3_SHIFT));
+	val |= (SWMODE_AUTO_AUTO << SWMODE4_SHIFT) |
+		(SWMODE_AUTO_AUTO << SWMODE3_SHIFT);
+	pmic_reg_write(p, REG_SW_5, val);
+
+	/* Set VGEN1 to 3.15V */
+	pmic_reg_read(p, REG_SETTING_0, &val);
+	val &= ~(VGEN1_MASK);
+	val |= VGEN1_3_15;
+	pmic_reg_write(p, REG_SETTING_0, val);
+
+	pmic_reg_read(p, REG_MODE_0, &val);
+	val |= VGEN1EN;
+	pmic_reg_write(p, REG_MODE_0, val);
+	udelay(2000);
+
+	return 0;
+}
+
+#if defined(CONFIG_FSL_ESDHC)
+struct fsl_esdhc_cfg esdhc_cfg = {MMC_SDHC1_BASE_ADDR};
+
+int board_mmc_init(bd_t *bis)
+{
+	/* configure pins for SDHC1 only */
+	mxc_request_iomux(MX35_PIN_SD1_CMD, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_SD1_CLK, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_SD1_DATA0, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_SD1_DATA1, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_SD1_DATA2, MUX_CONFIG_FUNC);
+	mxc_request_iomux(MX35_PIN_SD1_DATA3, MUX_CONFIG_FUNC);
+
+	/* MMC Card Detect on GPIO1_7 */
+	mxc_request_iomux(MX35_PIN_SCKT, MUX_CONFIG_ALT5);
+	mxc_iomux_set_input(MUX_IN_GPIO1_IN_7, 0x1);
+	gpio_direction_input(GPIO_MMC_CD);
+
+	mxc_request_iomux(MX35_PIN_FST, MUX_CONFIG_ALT5);
+	mxc_iomux_set_input(MUX_IN_GPIO1_IN_8, 0x1);
+	gpio_direction_output(GPIO_MMC_WP, 0);
+
+	esdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
+
+	return fsl_esdhc_initialize(bis, &esdhc_cfg);
+}
+
+int board_mmc_getcd(struct mmc *mmc)
+{
+	return !gpio_get_value(GPIO_MMC_CD);
+}
+#endif
+
+u32 get_board_rev(void)
+{
+	int rev = 0;
+
+	return (get_cpu_rev() & ~(0xF << 8)) | (rev & 0xF) << 8;
+}