arm, davinci: add support for am1808 based enbw_cmc board

- booting from NOR Flash with direct boot method
- POST support
- LOGBUF support

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Paulraj Sandeep <s-paulraj@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Christian Riesch <christian.riesch@omicron.at>

2 files changed, 652 insertions, 0 deletions

diff --git a/board/enbw/enbw_cmc/Makefile b/board/enbw/enbw_cmc/Makefile
new file mode 100644
index 0000000..cd1f0d4
--- /dev/null
+++ b/board/enbw/enbw_cmc/Makefile
@@ -0,0 +1,45 @@
+#
+# (C) Copyright 2000, 2001, 2002
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+#
+# 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).o
+
+COBJS   := $(BOARD).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))
+
+#########################################################################
+# This is for $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/enbw/enbw_cmc/enbw_cmc.c b/board/enbw/enbw_cmc/enbw_cmc.c
new file mode 100644
index 0000000..5cd5357
--- /dev/null
+++ b/board/enbw/enbw_cmc/enbw_cmc.c
@@ -0,0 +1,607 @@
+/*
+ * (C) Copyright 2011
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * Based on:
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Based on da830evm.c. Original Copyrights follow:
+ *
+ * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <hwconfig.h>
+#include <i2c.h>
+#include <malloc.h>
+#include <miiphy.h>
+#include <mmc.h>
+#include <net.h>
+#include <netdev.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/da850_lowlevel.h>
+#include <asm/arch/davinci_misc.h>
+#include <asm/arch/emif_defs.h>
+#include <asm/arch/emac_defs.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/pinmux_defs.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/sdmmc_defs.h>
+#include <asm/arch/timer_defs.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct lpsc_resource lpsc[] = {
+	{ DAVINCI_LPSC_AEMIF },
+	{ DAVINCI_LPSC_SPI1 },
+	{ DAVINCI_LPSC_ARM_RAM_ROM },
+	{ DAVINCI_LPSC_UART0 },
+	{ DAVINCI_LPSC_EMAC },
+	{ DAVINCI_LPSC_UART0 },
+	{ DAVINCI_LPSC_GPIO },
+	{ DAVINCI_LPSC_DDR_EMIF },
+	{ DAVINCI_LPSC_UART1 },
+	{ DAVINCI_LPSC_UART2 },
+	{ DAVINCI_LPSC_MMC_SD1 },
+	{ DAVINCI_LPSC_USB20 },
+	{ DAVINCI_LPSC_USB11 },
+};
+
+static const struct pinmux_config enbw_pins[] = {
+	{ pinmux(0), 8, 0 },
+	{ pinmux(0), 8, 1 },
+	{ pinmux(0), 8, 2 },
+	{ pinmux(0), 8, 3 },
+	{ pinmux(0), 8, 4 },
+	{ pinmux(0), 8, 5 },
+	{ pinmux(1), 4, 0 },
+	{ pinmux(1), 8, 1 },
+	{ pinmux(1), 8, 2 },
+	{ pinmux(1), 8, 3 },
+	{ pinmux(1), 8, 4 },
+	{ pinmux(1), 8, 5 },
+	{ pinmux(1), 8, 6 },
+	{ pinmux(1), 4, 7 },
+	{ pinmux(2), 8, 0 },
+	{ pinmux(5), 1, 0 },
+	{ pinmux(5), 1, 3 },
+	{ pinmux(5), 1, 7 },
+	{ pinmux(6), 1, 0 },
+	{ pinmux(6), 1, 1 },
+	{ pinmux(6), 8, 2 },
+	{ pinmux(6), 8, 3 },
+	{ pinmux(6), 1, 4 },
+	{ pinmux(6), 8, 5 },
+	{ pinmux(6), 1, 7 },
+	{ pinmux(7), 8, 2 },
+	{ pinmux(7), 1, 3 },
+	{ pinmux(7), 1, 6 },
+	{ pinmux(7), 1, 7 },
+	{ pinmux(13), 8, 2 },
+	{ pinmux(13), 8, 3 },
+	{ pinmux(13), 8, 4 },
+	{ pinmux(13), 8, 5 },
+	{ pinmux(13), 8, 6 },
+	{ pinmux(13), 8, 7 },
+	{ pinmux(14), 8, 0 },
+	{ pinmux(14), 8, 1 },
+	{ pinmux(16), 8, 1 },
+	{ pinmux(16), 8, 2 },
+	{ pinmux(16), 8, 3 },
+	{ pinmux(16), 8, 4 },
+	{ pinmux(16), 8, 5 },
+	{ pinmux(16), 8, 6 },
+	{ pinmux(16), 8, 7 },
+	{ pinmux(17), 1, 0 },
+	{ pinmux(17), 1, 1 },
+	{ pinmux(17), 1, 2 },
+	{ pinmux(17), 8, 3 },
+	{ pinmux(17), 8, 4 },
+	{ pinmux(17), 8, 5 },
+	{ pinmux(17), 8, 6 },
+	{ pinmux(17), 8, 7 },
+	{ pinmux(18), 8, 0 },
+	{ pinmux(18), 8, 1 },
+	{ pinmux(18), 2, 2 },
+	{ pinmux(18), 2, 3 },
+	{ pinmux(18), 2, 4 },
+	{ pinmux(18), 8, 6 },
+	{ pinmux(18), 8, 7 },
+	{ pinmux(19), 8, 0 },
+	{ pinmux(19), 2, 1 },
+	{ pinmux(19), 2, 2 },
+	{ pinmux(19), 2, 3 },
+	{ pinmux(19), 2, 4 },
+	{ pinmux(19), 8, 5 },
+	{ pinmux(19), 8, 6 },
+};
+
+const struct pinmux_resource pinmuxes[] = {
+	PINMUX_ITEM(emac_pins_mii),
+	PINMUX_ITEM(emac_pins_mdio),
+	PINMUX_ITEM(i2c0_pins),
+	PINMUX_ITEM(emifa_pins_cs2),
+	PINMUX_ITEM(emifa_pins_cs3),
+	PINMUX_ITEM(emifa_pins_cs4),
+	PINMUX_ITEM(emifa_pins_nand),
+	PINMUX_ITEM(emifa_pins_nor),
+	PINMUX_ITEM(spi1_pins_base),
+	PINMUX_ITEM(spi1_pins_scs0),
+	PINMUX_ITEM(uart1_pins_txrx),
+	PINMUX_ITEM(uart2_pins_txrx),
+	PINMUX_ITEM(uart2_pins_rtscts),
+	PINMUX_ITEM(enbw_pins),
+};
+
+const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
+
+struct gpio_config {
+	char name[GPIO_NAME_SIZE];
+	unsigned char bank;
+	unsigned char gpio;
+	unsigned char out;
+	unsigned char value;
+};
+
+static const struct gpio_config enbw_gpio_config[] = {
+	{ "RS485 enable",	8, 11, 1, 0 },
+	{ "RS485 iso",		8, 10, 1, 0 },
+	{ "W2HUT RS485 Rx ena",	8,  9, 1, 0 },
+	{ "W2HUT RS485 iso",	8,  8, 1, 0 },
+	{ "LAN reset",		7, 15, 1, 1 },
+	{ "ena 11V PLC",	7, 14, 1, 0 },
+	{ "ena 1.5V PLC",	7, 13, 1, 0 },
+	{ "disable VBUS",	7, 12, 1, 1 },
+	{ "PLC reset",		6, 13, 1, 1 },
+	{ "LCM RS",		6, 12, 1, 0 },
+	{ "LCM R/W",		6, 11, 1, 0 },
+	{ "PLC pairing",	6, 10, 1, 1 },
+	{ "PLC MDIO CLK",	6,  9, 1, 0 },
+	{ "HK218",		6,  8, 1, 0 },
+	{ "HK218 Rx",		6,  1, 1, 1 },
+	{ "TPM reset",		6,  0, 1, 1 },
+	{ "LCM E",		2,  2, 1, 1 },
+	{ "PV-IF RxD ena",	0, 15, 1, 1 },
+	{ "LED1",		1, 15, 1, 1 },
+	{ "LED2",		0,  1, 1, 1 },
+	{ "LED3",		0,  2, 1, 1 },
+	{ "LED4",		0,  3, 1, 1 },
+	{ "LED5",		0,  4, 1, 1 },
+	{ "LED6",		0,  5, 1, 0 },
+	{ "LED7",		0,  6, 1, 0 },
+	{ "LED8",		0, 14, 1, 0 },
+	{ "USER1",		0, 12, 0, 0 },
+	{ "USER2",		0, 13, 0, 0 },
+};
+
+#define PHY_POWER	0x0800
+
+static void enbw_cmc_switch(int port, int on)
+{
+	const char	*devname;
+	unsigned char phyaddr = 3;
+	unsigned char	reg = 0;
+	unsigned short	data;
+
+	if (port == 1)
+		phyaddr = 2;
+
+	devname = miiphy_get_current_dev();
+	if (!devname) {
+		printf("Error: no mii device\n");
+		return;
+	}
+	if (miiphy_read(devname, phyaddr, reg, &data) != 0) {
+		printf("Error reading from the PHY addr=%02x reg=%02x\n",
+			phyaddr, reg);
+		return;
+	}
+
+	if (on)
+		data &= ~PHY_POWER;
+	else
+		data |= PHY_POWER;
+
+	if (miiphy_write(devname, phyaddr, reg, data) != 0) {
+		printf("Error writing to the PHY addr=%02x reg=%02x\n",
+			phyaddr, reg);
+		return;
+	}
+}
+
+int board_init(void)
+{
+	int i, ret;
+
+#ifndef CONFIG_USE_IRQ
+	irq_init();
+#endif
+	/* address of boot parameters, not used as booting with DTT */
+	gd->bd->bi_boot_params = 0;
+
+	for (i = 0; i < ARRAY_SIZE(enbw_gpio_config); i++) {
+		int gpio = enbw_gpio_config[i].bank * 16 +
+			enbw_gpio_config[i].gpio;
+
+		ret = gpio_request(gpio, enbw_gpio_config[i].name);
+		if (ret) {
+			printf("%s: Could not get %s gpio\n", __func__,
+				enbw_gpio_config[i].name);
+			return -1;
+		}
+
+		if (enbw_gpio_config[i].out)
+			gpio_direction_output(gpio,
+				enbw_gpio_config[i].value);
+		else
+			gpio_direction_input(gpio);
+	}
+
+	/* setup the SUSPSRC for ARM to control emulation suspend */
+	clrbits_le32(&davinci_syscfg_regs->suspsrc,
+		(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C |
+		DAVINCI_SYSCFG_SUSPSRC_SPI1 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
+		DAVINCI_SYSCFG_SUSPSRC_UART2));
+
+	return 0;
+}
+
+#ifdef CONFIG_DRIVER_TI_EMAC
+/*
+ * Initializes on-board ethernet controllers.
+ */
+int board_eth_init(bd_t *bis)
+{
+#ifdef CONFIG_DRIVER_TI_EMAC
+	davinci_emac_mii_mode_sel(0);
+#endif /* CONFIG_DRIVER_TI_EMAC */
+
+	if (!davinci_emac_initialize()) {
+		printf("Error: Ethernet init failed!\n");
+		return -1;
+	}
+
+	if (hwconfig_subarg_cmp("switch", "lan", "on"))
+		/* Switch port lan on */
+		enbw_cmc_switch(1, 1);
+	else
+		enbw_cmc_switch(1, 0);
+
+	if (hwconfig_subarg_cmp("switch", "pwl", "on"))
+		/* Switch port pwl on */
+		enbw_cmc_switch(2, 1);
+	else
+		enbw_cmc_switch(2, 0);
+
+	return 0;
+}
+#endif /* CONFIG_DRIVER_TI_EMAC */
+
+#ifdef CONFIG_PREBOOT
+static uchar kbd_magic_prefix[]		= "key_magic_";
+static uchar kbd_command_prefix[]	= "key_cmd_";
+
+struct kbd_data_t {
+	char s1;
+};
+
+struct kbd_data_t *get_keys(struct kbd_data_t *kbd_data)
+{
+	/* read SW1 + SW2 */
+	kbd_data->s1 = gpio_get_value(12) +
+		(gpio_get_value(13) << 1);
+	return kbd_data;
+}
+
+static int compare_magic(const struct kbd_data_t *kbd_data, char *str)
+{
+	char s1 = str[0];
+
+	if (s1 >= '0' && s1 <= '9')
+		s1 -= '0';
+	else if (s1 >= 'a' && s1 <= 'f')
+		s1 = s1 - 'a' + 10;
+	else if (s1 >= 'A' && s1 <= 'F')
+		s1 = s1 - 'A' + 10;
+	else
+		return -1;
+
+	if (s1 != kbd_data->s1)
+		return -1;
+
+	return 0;
+}
+
+static char *key_match(const struct kbd_data_t *kbd_data)
+{
+	char magic[sizeof(kbd_magic_prefix) + 1];
+	char *suffix;
+	char *kbd_magic_keys;
+
+	/*
+	 * The following string defines the characters that can be appended
+	 * to "key_magic" to form the names of environment variables that
+	 * hold "magic" key codes, i. e. such key codes that can cause
+	 * pre-boot actions. If the string is empty (""), then only
+	 * "key_magic" is checked (old behaviour); the string "125" causes
+	 * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
+	 */
+	kbd_magic_keys = getenv("magic_keys");
+	if (kbd_magic_keys == NULL)
+		kbd_magic_keys = "";
+
+	/*
+	 * loop over all magic keys;
+	 * use '\0' suffix in case of empty string
+	 */
+	for (suffix = kbd_magic_keys; *suffix ||
+		suffix == kbd_magic_keys; ++suffix) {
+		sprintf(magic, "%s%c", kbd_magic_prefix, *suffix);
+
+		if (compare_magic(kbd_data, getenv(magic)) == 0) {
+			char cmd_name[sizeof(kbd_command_prefix) + 1];
+			char *cmd;
+
+			sprintf(cmd_name, "%s%c", kbd_command_prefix, *suffix);
+			cmd = getenv(cmd_name);
+
+			return cmd;
+		}
+	}
+
+	return NULL;
+}
+#endif /* CONFIG_PREBOOT */
+
+int misc_init_r(void)
+{
+	char *s, buf[32];
+#ifdef CONFIG_PREBOOT
+	struct kbd_data_t kbd_data;
+	/* Decode keys */
+	char *str = strdup(key_match(get_keys(&kbd_data)));
+	/* Set or delete definition */
+	setenv("preboot", str);
+	free(str);
+#endif /* CONFIG_PREBOOT */
+
+	/* count all restarts, and save this in an environment var */
+	s = getenv("restartcount");
+
+	if (s)
+		sprintf(buf, "%ld", simple_strtoul(s, NULL, 10) + 1);
+	else
+		strcpy(buf, "1");
+
+	setenv("restartcount", buf);
+	saveenv();
+
+#ifdef CONFIG_HW_WATCHDOG
+	davinci_hw_watchdog_enable();
+#endif
+
+	return 0;
+}
+
+struct cmc_led {
+	char name[20];
+	unsigned char bank;
+	unsigned char gpio;
+};
+
+struct cmc_led led_table[] = {
+	{"led1", 1, 15},
+	{"led2", 0, 1},
+	{"led3", 0, 2},
+	{"led4", 0, 3},
+	{"led5", 0, 4},
+	{"led6", 0, 5},
+	{"led7", 0, 6},
+	{"led8", 0, 14},
+};
+
+static int cmc_get_led_state(struct cmc_led *led)
+{
+	int value;
+	int gpio = led->bank * 16 + led->gpio;
+
+	value = gpio_get_value(gpio);
+
+	return value;
+}
+
+static int cmc_set_led_state(struct cmc_led *led, int state)
+{
+	int gpio = led->bank * 16 + led->gpio;
+
+	gpio_set_value(gpio, state);
+	return 0;
+}
+
+static int do_led(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	struct cmc_led *led;
+	int found = 0;
+	int i = 0;
+	int only_print = 0;
+	int len = ARRAY_SIZE(led_table);
+
+	if (argc < 2)
+		return cmd_usage(cmdtp);
+
+	if (argc < 3)
+		only_print = 1;
+
+	led = led_table;
+	while ((!found) && (i < len)) {
+		if (strcmp(argv[1], led->name) == 0) {
+			found = 1;
+		} else {
+			led++;
+			i++;
+		}
+	}
+	if (!found)
+		return cmd_usage(cmdtp);
+
+	if (only_print) {
+		if (cmc_get_led_state(led))
+			printf("on\n");
+		else
+			printf("off\n");
+
+		return 0;
+	}
+	if (strcmp(argv[2], "on") == 0)
+		cmc_set_led_state(led, 1);
+	else
+		cmc_set_led_state(led, 0);
+
+	return 0;
+}
+
+U_BOOT_CMD(led, 3, 1, do_led,
+	"switch on/off board led",
+	"[name] [on/off]"
+);
+
+#ifdef CONFIG_HW_WATCHDOG
+void hw_watchdog_reset(void)
+{
+	davinci_hw_watchdog_reset();
+}
+#endif
+
+#if defined(CONFIG_POST)
+void arch_memory_failure_handle(void)
+{
+	struct davinci_gpio *gpio = davinci_gpio_bank01;
+	int state = 1;
+
+	/*
+	 * if memor< failure blink with the LED 1,2 and 3
+	 * as we running from flash, we cannot use the gpio
+	 * api here, so access the gpio pin direct through
+	 * the gpio register.
+	 */
+	while (1) {
+		if (state) {
+			clrbits_le32(&gpio->out_data, 0x80000006);
+			state = 0;
+		} else {
+			setbits_le32(&gpio->out_data, 0x80000006);
+			state = 1;
+		}
+		udelay(500);
+	}
+}
+#endif
+
+#if defined(CONFIG_BOOTCOUNT_LIMIT)
+void bootcount_store(ulong a)
+{
+	struct davinci_rtc *reg =
+		(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
+
+	/*
+	 * write RTC kick register to enable write
+	 * for RTC Scratch registers. Cratch0 and 1 are
+	 * used for bootcount values.
+	 */
+	out_be32(&reg->kick0r, RTC_KICK0R_WE);
+	out_be32(&reg->kick1r, RTC_KICK1R_WE);
+	out_be32(&reg->scratch0, a);
+	out_be32(&reg->scratch1, BOOTCOUNT_MAGIC);
+}
+
+ulong bootcount_load(void)
+{
+	struct davinci_rtc *reg =
+		(struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR;
+
+	if (in_be32(&reg->scratch1) != BOOTCOUNT_MAGIC)
+		return 0;
+	else
+		return in_be32(&reg->scratch0);
+}
+#endif
+
+void board_gpio_init(void)
+{
+	struct davinci_gpio *gpio = davinci_gpio_bank01;
+
+	/*
+	 * Power on required peripherals
+	 * ARM does not have access by default to PSC0 and PSC1
+	 * assuming here that the DSP bootloader has set the IOPU
+	 * such that PSC access is available to ARM
+	 */
+	if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
+		return;
+
+	/*
+	 * set LED (gpio Interface not usable here)
+	 * set LED pins to output and state 0
+	 */
+	clrbits_le32(&gpio->dir, 0x8000407e);
+	clrbits_le32(&gpio->out_data, 0x8000407e);
+	/* set LED 1 - 5 to state on */
+	setbits_le32(&gpio->out_data, 0x8000001e);
+}
+
+int board_late_init(void)
+{
+	cmc_set_led_state(&led_table[4], 0);
+
+	return 0;
+}
+
+void show_boot_progress(int val)
+{
+	switch (val) {
+	case 1:
+		cmc_set_led_state(&led_table[4], 1);
+		break;
+	case 4:
+		cmc_set_led_state(&led_table[4], 0);
+		break;
+	case 15:
+		cmc_set_led_state(&led_table[4], 1);
+		break;
+	}
+}
+
+#ifdef CONFIG_DAVINCI_MMC
+static struct davinci_mmc mmc_sd1 = {
+	.reg_base	= (struct davinci_mmc_regs *)DAVINCI_MMC_SD1_BASE,
+	.input_clk	= 228000000,
+	.host_caps	= MMC_MODE_4BIT,
+	.voltages	= MMC_VDD_32_33 | MMC_VDD_33_34,
+	.version	= MMC_CTLR_VERSION_2,
+};
+
+int board_mmc_init(bd_t *bis)
+{
+	mmc_sd1.input_clk = clk_get(DAVINCI_MMC_CLKID);
+	/* Add slot-0 to mmc subsystem */
+	return davinci_mmc_init(bis, &mmc_sd1);
+}
+#endif