ARM: ts4800: add basic board support

This commit adds basic support including:
MMC, Serial console, TS4800 watchdog

The config use CONFIG_SKIP_LOWLEVEL_INIT as U-boot is used as a second
stage bootloader.

Signed-off-by: Lucile Quirion <lucile.quirion@savoirfairelinux.com>
signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Cc: Stefano Babic <sbabic@denx.de>

5 files changed, 198 insertions, 0 deletions

diff --git a/board/technologic/ts4800/Kconfig b/board/technologic/ts4800/Kconfig
new file mode 100644
index 0000000..a28d5e4
--- /dev/null
+++ b/board/technologic/ts4800/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_TS4800
+
+config SYS_BOARD
+	default "ts4800"
+
+config SYS_VENDOR
+	default "technologic"
+
+config SYS_SOC
+	default "mx5"
+
+config SYS_CONFIG_NAME
+	default "ts4800"
+
+endif
diff --git a/board/technologic/ts4800/MAINTAINERS b/board/technologic/ts4800/MAINTAINERS
new file mode 100644
index 0000000..e013ee4
--- /dev/null
+++ b/board/technologic/ts4800/MAINTAINERS
@@ -0,0 +1,6 @@
+TS4800 BOARD
+M:	Lucile Quirion <lucile.quirion@savoirfairelinux.com>
+S:	Maintained
+F:	board/ts/ts4800/
+F:	include/configs/ts4800.h
+F:	configs/ts4800_defconfig
diff --git a/board/technologic/ts4800/Makefile b/board/technologic/ts4800/Makefile
new file mode 100644
index 0000000..e9f1a37
--- /dev/null
+++ b/board/technologic/ts4800/Makefile
@@ -0,0 +1,7 @@
+#
+# (C) Copyright 2015 Savoir-faire Linux
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y			+= ts4800.o
diff --git a/board/technologic/ts4800/ts4800.c b/board/technologic/ts4800/ts4800.c
new file mode 100644
index 0000000..0a8d43e
--- /dev/null
+++ b/board/technologic/ts4800/ts4800.c
@@ -0,0 +1,154 @@
+/*
+ * (C) Copyright 2015 Savoir-faire Linux Inc.
+ *
+ * Derived from MX51EVK code by
+ *   Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/iomux-mx51.h>
+#include <asm/errno.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/clock.h>
+#include <asm/imx-common/mx5_video.h>
+#include <mmc.h>
+#include <fsl_esdhc.h>
+#include <mc13892.h>
+
+#include "ts4800.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_FSL_ESDHC
+struct fsl_esdhc_cfg esdhc_cfg[2] = {
+	{MMC_SDHC1_BASE_ADDR},
+	{MMC_SDHC2_BASE_ADDR},
+};
+#endif
+
+int dram_init(void)
+{
+	/* dram_init must store complete ramsize in gd->ram_size */
+	gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE,
+				PHYS_SDRAM_1_SIZE);
+	return 0;
+}
+
+u32 get_board_rev(void)
+{
+	u32 rev = get_cpu_rev();
+	if (!gpio_get_value(IMX_GPIO_NR(1, 22)))
+		rev |= BOARD_REV_2_0 << BOARD_VER_OFFSET;
+	return rev;
+}
+
+#define UART_PAD_CTRL	(PAD_CTL_HYS | PAD_CTL_PUS_100K_DOWN | PAD_CTL_DSE_HIGH)
+
+static void setup_iomux_uart(void)
+{
+	static const iomux_v3_cfg_t uart_pads[] = {
+		MX51_PAD_UART1_RXD__UART1_RXD,
+		MX51_PAD_UART1_TXD__UART1_TXD,
+		NEW_PAD_CTRL(MX51_PAD_UART1_RTS__UART1_RTS, UART_PAD_CTRL),
+		NEW_PAD_CTRL(MX51_PAD_UART1_CTS__UART1_CTS, UART_PAD_CTRL),
+	};
+
+	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
+}
+
+#ifdef CONFIG_FSL_ESDHC
+int board_mmc_getcd(struct mmc *mmc)
+{
+	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+	int ret;
+
+	imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX51_PAD_GPIO1_0__GPIO1_0,
+						NO_PAD_CTRL));
+	gpio_direction_input(IMX_GPIO_NR(1, 0));
+	imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX51_PAD_GPIO1_6__GPIO1_6,
+						NO_PAD_CTRL));
+	gpio_direction_input(IMX_GPIO_NR(1, 6));
+
+	if (cfg->esdhc_base == MMC_SDHC1_BASE_ADDR)
+		ret = !gpio_get_value(IMX_GPIO_NR(1, 0));
+	else
+		ret = !gpio_get_value(IMX_GPIO_NR(1, 6));
+
+	return ret;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	static const iomux_v3_cfg_t sd1_pads[] = {
+		NEW_PAD_CTRL(MX51_PAD_SD1_CMD__SD1_CMD, PAD_CTL_DSE_MAX |
+			PAD_CTL_HYS | PAD_CTL_PUS_47K_UP | PAD_CTL_SRE_FAST),
+		NEW_PAD_CTRL(MX51_PAD_SD1_CLK__SD1_CLK, PAD_CTL_DSE_MAX |
+			PAD_CTL_PUS_47K_UP | PAD_CTL_SRE_FAST),
+		NEW_PAD_CTRL(MX51_PAD_SD1_DATA0__SD1_DATA0, PAD_CTL_DSE_MAX |
+			PAD_CTL_HYS | PAD_CTL_PUS_47K_UP | PAD_CTL_SRE_FAST),
+		NEW_PAD_CTRL(MX51_PAD_SD1_DATA1__SD1_DATA1, PAD_CTL_DSE_MAX |
+			PAD_CTL_HYS | PAD_CTL_PUS_47K_UP | PAD_CTL_SRE_FAST),
+		NEW_PAD_CTRL(MX51_PAD_SD1_DATA2__SD1_DATA2, PAD_CTL_DSE_MAX |
+			PAD_CTL_HYS | PAD_CTL_PUS_47K_UP | PAD_CTL_SRE_FAST),
+		NEW_PAD_CTRL(MX51_PAD_SD1_DATA3__SD1_DATA3, PAD_CTL_DSE_MAX |
+			PAD_CTL_HYS | PAD_CTL_PUS_100K_DOWN | PAD_CTL_SRE_FAST),
+		NEW_PAD_CTRL(MX51_PAD_GPIO1_0__SD1_CD, PAD_CTL_HYS),
+		NEW_PAD_CTRL(MX51_PAD_GPIO1_1__SD1_WP, PAD_CTL_HYS),
+	};
+
+	esdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+
+	imx_iomux_v3_setup_multiple_pads(sd1_pads, ARRAY_SIZE(sd1_pads));
+
+	return fsl_esdhc_initialize(bis, &esdhc_cfg[0]);
+}
+#endif
+
+int board_early_init_f(void)
+{
+	setup_iomux_uart();
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+
+	return 0;
+}
+
+/*
+ * Do not overwrite the console
+ * Use always serial for U-Boot console
+ */
+int overwrite_console(void)
+{
+	return 1;
+}
+
+int checkboard(void)
+{
+	puts("Board: TS4800\n");
+
+	return 0;
+}
+
+void hw_watchdog_reset(void)
+{
+	struct ts4800_wtd_regs *wtd = (struct ts4800_wtd_regs *) (TS4800_SYSCON_BASE + 0xE);
+	/* feed the watchdog for another 10s */
+	writew(0x2, &wtd->feed);
+}
+
+void hw_watchdog_init(void)
+{
+	return;
+}
diff --git a/board/technologic/ts4800/ts4800.h b/board/technologic/ts4800/ts4800.h
new file mode 100644
index 0000000..6856b05
--- /dev/null
+++ b/board/technologic/ts4800/ts4800.h
@@ -0,0 +1,16 @@
+/*
+ * (C) Copyright 2015 Savoir-faire Linux Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _TS4800_H
+#define _TS4800_H
+
+#define TS4800_SYSCON_BASE 0xb0010000
+
+struct ts4800_wtd_regs {
+	u16	feed;
+};
+
+#endif