Add support for KARO TX25 board

This is an i.MX25 base board with only NAND
so it uses nand_spl to boot.

Signed-off-by: John Rigby <jcrigby@gmail.com>

Tune configuration, add support for (redundant) environment in NAND.
Signed-off-by: Wolfgang Denk <wd@denx.de>

Acked-by: Wolfgang Denk <wd@denx.de>
CC: Fred Fan <fanyefeng@gmail.com>
CC: Tom <Tom.Rix@windriver.com>

4 files changed, 363 insertions, 0 deletions

diff --git a/board/karo/tx25/Makefile b/board/karo/tx25/Makefile
new file mode 100644
index 0000000..b0e610f
--- /dev/null
+++ b/board/karo/tx25/Makefile
@@ -0,0 +1,51 @@
+#
+# (C) Copyright 2009 DENX Software Engineering
+# Author: John Rigby <jcrigby@gmail.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	:= tx25.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)
+	$(AR) $(ARFLAGS) $@ $(OBJS) $(SOBJS)
+
+clean:
+	rm -f $(SOBJS) $(OBJS)
+
+distclean:	clean
+	rm -f $(LIB) core *.bak $(obj).depend
+
+#########################################################################
+
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
+
diff --git a/board/karo/tx25/config.mk b/board/karo/tx25/config.mk
new file mode 100644
index 0000000..732a14a
--- /dev/null
+++ b/board/karo/tx25/config.mk
@@ -0,0 +1,5 @@
+ifdef CONFIG_NAND_SPL
+TEXT_BASE = 0x81ec0000
+else
+TEXT_BASE = 0x81f00000
+endif
diff --git a/board/karo/tx25/lowlevel_init.S b/board/karo/tx25/lowlevel_init.S
new file mode 100644
index 0000000..823df10
--- /dev/null
+++ b/board/karo/tx25/lowlevel_init.S
@@ -0,0 +1,131 @@
+/*
+ * (C) Copyright 2009 DENX Software Engineering
+ * Author: John Rigby <jrigby@gmail.com>
+ *
+ * Based on U-Boot and RedBoot sources for several different i.mx
+ * platforms.
+ *
+ * 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 <asm/macro.h>
+
+.macro init_aips
+	write32	0x43f00000, 0x77777777
+	write32	0x43f00004, 0x77777777
+	write32	0x43f00000, 0x77777777
+	write32	0x53f00004, 0x77777777
+.endm
+
+.macro init_max
+	write32	0x43f04000, 0x43210
+	write32	0x43f04100, 0x43210
+	write32	0x43f04200, 0x43210
+	write32	0x43f04300, 0x43210
+	write32	0x43f04400, 0x43210
+
+	write32	0x43f04010, 0x10
+	write32	0x43f04110, 0x10
+	write32	0x43f04210, 0x10
+	write32	0x43f04310, 0x10
+	write32	0x43f04410, 0x10
+
+	write32	0x43f04800, 0x0
+	write32	0x43f04900, 0x0
+	write32	0x43f04a00, 0x0
+	write32	0x43f04b00, 0x0
+	write32	0x43f04c00, 0x0
+.endm
+
+.macro init_m3if
+	write32 0xb8003000, 0x1
+.endm
+
+.macro init_clocks
+	/*
+	 * clocks
+	 *
+	 * first enable CLKO debug output
+	 * 0x40000000 enables the debug CLKO signal
+	 * 0x05000000 sets CLKO divider to 6
+	 * 0x00600000 makes CLKO parent clk the USB clk
+	 */
+	write32	0x53f80064, 0x45600000
+	write32	0x53f80008, 0x20034000
+
+	/*
+	 * enable all implemented clocks in all three
+	 * clock control registers
+	 */
+	write32	0x53f8000c, 0x1fffffff
+	write32	0x53f80010, 0xffffffff
+	write32	0x53f80014, 0xfdfff
+.endm
+
+.macro init_ddrtype
+	/*
+	 * ddr_type is 3.3v SDRAM
+	 */
+	write32	0x43fac454, 0x800
+.endm
+
+/*
+ * sdram controller init
+ */
+.macro init_sdram_bank bankaddr, ctl, cfg
+	ldr	r0, =0xb8001000
+	ldr	r2, =\bankaddr
+	/*
+	 * reset SDRAM controller
+	 * then wait for initialization to complete
+	 */
+	ldr	r1, =(1 << 1)
+	str	r1, [r0, #0x10]
+1:	ldr	r3, [r0, #0x10]
+	tst	r3, #(1 << 31)
+	beq	1b
+
+	ldr	r1, =0x95728
+	str	r1, [r0, #\cfg]		/* config */
+
+	ldr	r1, =0x92116480		/* control | precharge */
+	str	r1, [r0, #\ctl]		/* write command to controller */
+	str	r1, [r2, #0x400]	/* command encoded in address */
+
+	ldr	r1, =0xa2116480		/* auto refresh */
+	str	r1, [r0, #\ctl]
+	ldrb	r3, [r2]		/* read dram twice to auto refresh */
+	ldrb	r3, [r2]
+
+	ldr	r1, =0xb2116480		/* control | load mode */
+	str	r1, [r0, #\ctl]		/* write command to controller */
+	strb	r1, [r2, #0x33]		/* command encoded in address */
+
+	ldr	r1, =0x82116480		/* control  | normal (0)*/
+	str	r1, [r0, #\ctl]		/* write command to controller */
+.endm
+
+.globl lowlevel_init
+lowlevel_init:
+	init_aips
+	init_max
+	init_m3if
+	init_clocks
+
+	init_sdram_bank 0x80000000, 0x0, 0x4
+
+	init_sdram_bank 0x90000000, 0x8, 0xc
+	mov	pc, lr
diff --git a/board/karo/tx25/tx25.c b/board/karo/tx25/tx25.c
new file mode 100644
index 0000000..4d6a96d
--- /dev/null
+++ b/board/karo/tx25/tx25.c
@@ -0,0 +1,176 @@
+/*
+ * (C) Copyright 2009 DENX Software Engineering
+ * Author: John Rigby <jrigby@gmail.com>
+ *
+ * Based on imx27lite.c:
+ *   Copyright (C) 2008,2009 Eric Jarrige <jorasse@users.sourceforge.net>
+ *   Copyright (C) 2009 Ilya Yanok <yanok@emcraft.com>
+ * And:
+ *   RedBoot tx25_misc.c Copyright (C) 2009 Red Hat
+ *
+ * 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/arch/imx-regs.h>
+#include <asm/arch/imx25-pinmux.h>
+
+static void mdelay(int n)
+{
+	while (n-- > 0)
+		udelay(1000);
+}
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_FEC_MXC
+void tx25_fec_init(void)
+{
+	struct iomuxc_mux_ctl *muxctl;
+	struct iomuxc_pad_ctl *padctl;
+	u32 val;
+	u32 gpio_mux_mode = MX25_PIN_MUX_MODE(5);
+	struct gpio_regs *gpio4 = (struct gpio_regs *)IMX_GPIO4_BASE;
+	struct gpio_regs *gpio3 = (struct gpio_regs *)IMX_GPIO3_BASE;
+	u32 saved_rdata0_mode, saved_rdata1_mode, saved_rx_dv_mode;
+
+	debug("tx25_fec_init\n");
+	/*
+	 * fec pin init is generic
+	 */
+	mx25_fec_init_pins();
+
+	/*
+	 * Set up the FEC_RESET_B and FEC_ENABLE GPIO pins.
+	 *
+	 * FEC_RESET_B: gpio4[7] is ALT 5 mode of pin D13
+	 * FEC_ENABLE_B: gpio4[9] is ALT 5 mode of pin D11
+	 */
+	muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
+	padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE;
+
+	writel(gpio_mux_mode, &muxctl->pad_d13);
+	writel(gpio_mux_mode, &muxctl->pad_d11);
+
+	writel(0x0, &padctl->pad_d13);
+	writel(0x0, &padctl->pad_d11);
+
+	/* drop PHY power and assert reset (low) */
+	val = readl(&gpio4->dr) & ~((1 << 7) | (1 << 9));
+	writel(val, &gpio4->dr);
+	val = readl(&gpio4->dir) | (1 << 7) | (1 << 9);
+	writel(val, &gpio4->dir);
+
+	mdelay(5);
+
+	debug("resetting phy\n");
+
+	/* turn on PHY power leaving reset asserted */
+	val = readl(&gpio4->dr) | 1 << 9;
+	writel(val, &gpio4->dr);
+
+	mdelay(10);
+
+	/*
+	 * Setup some strapping pins that are latched by the PHY
+	 * as reset goes high.
+	 *
+	 * Set PHY mode to 111
+	 *  mode0 comes from FEC_RDATA0 which is GPIO 3_10 in mux mode 5
+	 *  mode1 comes from FEC_RDATA1 which is GPIO 3_11 in mux mode 5
+	 *  mode2 is tied high so nothing to do
+	 *
+	 * Turn on RMII mode
+	 *  RMII mode is selected by FEC_RX_DV which is GPIO 3_12 in mux mode
+	 */
+	/*
+	 * save three current mux modes and set each to gpio mode
+	 */
+	saved_rdata0_mode = readl(&muxctl->pad_fec_rdata0);
+	saved_rdata1_mode = readl(&muxctl->pad_fec_rdata1);
+	saved_rx_dv_mode = readl(&muxctl->pad_fec_rx_dv);
+
+	writel(gpio_mux_mode, &muxctl->pad_fec_rdata0);
+	writel(gpio_mux_mode, &muxctl->pad_fec_rdata1);
+	writel(gpio_mux_mode, &muxctl->pad_fec_rx_dv);
+
+	/*
+	 * set each to 1 and make each an output
+	 */
+	val = readl(&gpio3->dr) | (1 << 10) | (1 << 11) | (1 << 12);
+	writel(val, &gpio3->dr);
+	val = readl(&gpio3->dir) | (1 << 10) | (1 << 11) | (1 << 12);
+	writel(val, &gpio3->dir);
+
+	mdelay(22);		/* this value came from RedBoot */
+
+	/*
+	 * deassert PHY reset
+	 */
+	val = readl(&gpio4->dr) | 1 << 7;
+	writel(val, &gpio4->dr);
+	writel(val, &gpio4->dr);
+
+	mdelay(5);
+
+	/*
+	 * set FEC pins back
+	 */
+	writel(saved_rdata0_mode, &muxctl->pad_fec_rdata0);
+	writel(saved_rdata1_mode, &muxctl->pad_fec_rdata1);
+	writel(saved_rx_dv_mode, &muxctl->pad_fec_rx_dv);
+}
+#else
+#define tx25_fec_init()
+#endif
+
+int board_init()
+{
+#ifdef CONFIG_MXC_UART
+	extern void mx25_uart_init_pins(void);
+
+	mx25_uart_init_pins();
+#endif
+	return 0;
+}
+
+int board_late_init(void)
+{
+	tx25_fec_init();
+	return 0;
+}
+
+int dram_init (void)
+{
+
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = get_ram_size((volatile void *)PHYS_SDRAM_1,
+			PHYS_SDRAM_1_SIZE);
+#if CONFIG_NR_DRAM_BANKS > 1
+	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
+	gd->bd->bi_dram[1].size = get_ram_size((volatile void *)PHYS_SDRAM_2,
+			PHYS_SDRAM_2_SIZE);
+#endif
+
+	return 0;
+}
+
+int checkboard(void)
+{
+	printf("KARO TX25\n");
+	return 0;
+}