am335x, guardian: Add support for the bosch guardian board

Add support for the Bosch Guardian board.

CPU  : AM335X-GP rev 2.1
Model: Bosch AM335x Guardian
I2C:   ready
DRAM:  256 MiB
NAND:  512 MiB
MMC:   OMAP SD/MMC: 0

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Felix Brack <fb@ltec.ch>

6 files changed, 335 insertions, 0 deletions

diff --git a/board/bosch/guardian/Kconfig b/board/bosch/guardian/Kconfig
new file mode 100644
index 0000000000..1417da61f0
--- /dev/null
+++ b/board/bosch/guardian/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_AM335X_GUARDIAN
+
+config SYS_BOARD
+	default "guardian"
+
+config SYS_VENDOR
+	default "bosch"
+
+config SYS_SOC
+	default "am33xx"
+
+config SYS_CONFIG_NAME
+	default "am335x_guardian"
+
+endif
diff --git a/board/bosch/guardian/MAINTAINERS b/board/bosch/guardian/MAINTAINERS
new file mode 100644
index 0000000000..8d16ec0202
--- /dev/null
+++ b/board/bosch/guardian/MAINTAINERS
@@ -0,0 +1,6 @@
+Guardian BOARD
+M:	Sjoerd Simons <sjoerd.simons@collabora.co.uk>
+S:	Maintained
+F:	board/bosch/guardian/
+F:	include/configs/am335x_guardian.h
+F:	configs/am335x_guardian_defconfig
diff --git a/board/bosch/guardian/Makefile b/board/bosch/guardian/Makefile
new file mode 100644
index 0000000000..11625c9dd6
--- /dev/null
+++ b/board/bosch/guardian/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier:	GPL-2.0+
+#
+# Makefile
+#
+# Copyright (C) 2018 Robert Bosch Power Tools GmbH
+#
+
+ifeq ($(CONFIG_SKIP_LOWLEVEL_INIT),)
+obj-y	:= mux.o
+endif
+
+obj-y	+= board.o
diff --git a/board/bosch/guardian/board.c b/board/bosch/guardian/board.c
new file mode 100644
index 0000000000..86ab180f5c
--- /dev/null
+++ b/board/bosch/guardian/board.c
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * board.c
+ *
+ * Board functions for Bosch Guardian
+ *
+ * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
+ * Copyright (C) 2018 Robert Bosch Power Tools GmbH
+ */
+
+#include <common.h>
+#include <cpsw.h>
+#include <dm.h>
+#include <environment.h>
+#include <environment.h>
+#include <errno.h>
+#include <i2c.h>
+#include <miiphy.h>
+#include <panel.h>
+#include <power/tps65217.h>
+#include <power/tps65910.h>
+#include <spl.h>
+#include <watchdog.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/ddr_defs.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/mem.h>
+#include <asm/arch/mmc_host_def.h>
+#include <asm/arch/omap.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/emif.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include "board.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
+static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
+
+static const struct ddr_data ddr3_data = {
+	.datardsratio0 = MT41K128M16JT125K_RD_DQS,
+	.datawdsratio0 = MT41K128M16JT125K_WR_DQS,
+	.datafwsratio0 = MT41K128M16JT125K_PHY_FIFO_WE,
+	.datawrsratio0 = MT41K128M16JT125K_PHY_WR_DATA,
+};
+
+static const struct cmd_control ddr3_cmd_ctrl_data = {
+	.cmd0csratio = MT41K128M16JT125K_RATIO,
+	.cmd0iclkout = MT41K128M16JT125K_INVERT_CLKOUT,
+
+	.cmd1csratio = MT41K128M16JT125K_RATIO,
+	.cmd1iclkout = MT41K128M16JT125K_INVERT_CLKOUT,
+
+	.cmd2csratio = MT41K128M16JT125K_RATIO,
+	.cmd2iclkout = MT41K128M16JT125K_INVERT_CLKOUT,
+};
+
+static struct emif_regs ddr3_emif_reg_data = {
+	.sdram_config = MT41K128M16JT125K_EMIF_SDCFG,
+	.ref_ctrl = MT41K128M16JT125K_EMIF_SDREF,
+	.sdram_tim1 = MT41K128M16JT125K_EMIF_TIM1,
+	.sdram_tim2 = MT41K128M16JT125K_EMIF_TIM2,
+	.sdram_tim3 = MT41K128M16JT125K_EMIF_TIM3,
+	.zq_config = MT41K128M16JT125K_ZQ_CFG,
+	.emif_ddr_phy_ctlr_1 = MT41K128M16JT125K_EMIF_READ_LATENCY,
+};
+
+#define OSC	(V_OSCK / 1000000)
+const struct dpll_params dpll_ddr = {
+		400, OSC - 1, 1, -1, -1, -1, -1};
+
+void am33xx_spl_board_init(void)
+{
+	int mpu_vdd;
+	int usb_cur_lim;
+
+	/* Get the frequency */
+	dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev);
+
+	if (i2c_probe(TPS65217_CHIP_PM))
+		return;
+
+	/*
+	 * Increase USB current limit to 1300mA or 1800mA and set
+	 * the MPU voltage controller as needed.
+	 */
+	if (dpll_mpu_opp100.m == MPUPLL_M_1000) {
+		usb_cur_lim = TPS65217_USB_INPUT_CUR_LIMIT_1800MA;
+		mpu_vdd = TPS65217_DCDC_VOLT_SEL_1325MV;
+	} else {
+		usb_cur_lim = TPS65217_USB_INPUT_CUR_LIMIT_1300MA;
+		mpu_vdd = TPS65217_DCDC_VOLT_SEL_1275MV;
+	}
+
+	if (tps65217_reg_write(TPS65217_PROT_LEVEL_NONE,
+			       TPS65217_POWER_PATH,
+			       usb_cur_lim,
+			       TPS65217_USB_INPUT_CUR_LIMIT_MASK))
+		puts("tps65217_reg_write failure\n");
+
+	/* Set DCDC3 (CORE) voltage to 1.125V */
+	if (tps65217_voltage_update(TPS65217_DEFDCDC3,
+				    TPS65217_DCDC_VOLT_SEL_1125MV)) {
+		puts("tps65217_voltage_update failure\n");
+		return;
+	}
+
+	/* Set CORE Frequencies to OPP100 */
+	do_setup_dpll(&dpll_core_regs, &dpll_core_opp100);
+
+	/* Set DCDC2 (MPU) voltage */
+	if (tps65217_voltage_update(TPS65217_DEFDCDC2, mpu_vdd)) {
+		puts("tps65217_voltage_update failure\n");
+		return;
+	}
+
+	/*
+	 * Set LDO3 to 1.8V and LDO4 to 3.3V
+	 */
+	if (tps65217_reg_write(TPS65217_PROT_LEVEL_2,
+			       TPS65217_DEFLS1,
+			       TPS65217_LDO_VOLTAGE_OUT_1_8,
+			       TPS65217_LDO_MASK))
+		puts("tps65217_reg_write failure\n");
+
+	if (tps65217_reg_write(TPS65217_PROT_LEVEL_2,
+			       TPS65217_DEFLS2,
+			       TPS65217_LDO_VOLTAGE_OUT_3_3,
+			       TPS65217_LDO_MASK))
+		puts("tps65217_reg_write failure\n");
+
+	/* Set MPU Frequency to what we detected now that voltages are set */
+	do_setup_dpll(&dpll_mpu_regs, &dpll_mpu_opp100);
+}
+
+const struct dpll_params *get_dpll_ddr_params(void)
+{
+	enable_i2c0_pin_mux();
+	i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
+
+	return &dpll_ddr;
+}
+
+void set_uart_mux_conf(void)
+{
+	enable_uart0_pin_mux();
+}
+
+void set_mux_conf_regs(void)
+{
+	enable_board_pin_mux();
+}
+
+const struct ctrl_ioregs ioregs = {
+	.cm0ioctl		= MT41K128M16JT125K_IOCTRL_VALUE,
+	.cm1ioctl		= MT41K128M16JT125K_IOCTRL_VALUE,
+	.cm2ioctl		= MT41K128M16JT125K_IOCTRL_VALUE,
+	.dt0ioctl		= MT41K128M16JT125K_IOCTRL_VALUE,
+	.dt1ioctl		= MT41K128M16JT125K_IOCTRL_VALUE,
+};
+
+void sdram_init(void)
+{
+	config_ddr(400, &ioregs,
+		   &ddr3_data,
+		   &ddr3_cmd_ctrl_data,
+		   &ddr3_emif_reg_data, 0);
+}
+#endif
+
+int board_init(void)
+{
+#if defined(CONFIG_HW_WATCHDOG)
+	hw_watchdog_init();
+#endif
+
+	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+#ifdef CONFIG_NAND
+	gpmc_init();
+#endif
+	return 0;
+}
diff --git a/board/bosch/guardian/board.h b/board/bosch/guardian/board.h
new file mode 100644
index 0000000000..b301caf47f
--- /dev/null
+++ b/board/bosch/guardian/board.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * board.h
+ *
+ * Board header for Bosch Guardian
+ *
+ * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
+ * Copyright (C) 2018 Robert Bosch Power Tools GmbH
+ */
+
+#ifndef _BOARD_H_
+#define _BOARD_H_
+
+void enable_uart0_pin_mux(void);
+void enable_i2c0_pin_mux(void);
+void enable_board_pin_mux(void);
+#endif
diff --git a/board/bosch/guardian/mux.c b/board/bosch/guardian/mux.c
new file mode 100644
index 0000000000..708c3e7fdd
--- /dev/null
+++ b/board/bosch/guardian/mux.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * mux.c
+ *
+ * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
+ * Copyright (C) 2018 Robert Bosch Power Tools GmbH
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
+#include "board.h"
+
+static struct module_pin_mux uart0_pin_mux[] = {
+	{OFFSET(uart0_rxd), (MODE(0) | PULLUP_EN | RXACTIVE)},
+	{OFFSET(uart0_txd), (MODE(0) | PULLUDEN)},
+	{-1},
+};
+
+static struct module_pin_mux i2c0_pin_mux[] = {
+	{OFFSET(i2c0_sda), (MODE(0) | RXACTIVE | PULLUDEN | SLEWCTRL)},
+	{OFFSET(i2c0_scl), (MODE(0) | RXACTIVE | PULLUDEN | SLEWCTRL)},
+	{-1},
+};
+
+static struct module_pin_mux adc_voltages_en[] = {
+	{OFFSET(mcasp0_ahclkx), (MODE(7) | PULLUP_EN)},
+	{-1},
+};
+
+static struct module_pin_mux asp_power_en[] = {
+	{OFFSET(mcasp0_aclkx), (MODE(7) | PULLUP_EN)},
+	{-1},
+};
+
+static struct module_pin_mux switch_off_3v6_pin_mux[] = {
+	{OFFSET(mii1_txd0), (MODE(7) | PULLUP_EN)},
+	/*
+	 * The uart1 lines are made floating inputs, based on the Guardian
+	 * A2 Sample Power Supply Schematics
+	 */
+	{OFFSET(uart1_rxd), (MODE(7) | PULLUDDIS)},
+	{OFFSET(uart1_txd), (MODE(7) | PULLUDDIS)},
+	{-1},
+};
+
+#ifdef CONFIG_NAND
+static struct module_pin_mux nand_pin_mux[] = {
+	{OFFSET(gpmc_ad0),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad1),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad2),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad3),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad4),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad5),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad6),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad7),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT
+	{OFFSET(gpmc_ad8),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad9),      (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad10),     (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad11),     (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad12),     (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad13),     (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad14),     (MODE(0) | PULLUDDIS | RXACTIVE)},
+	{OFFSET(gpmc_ad15),     (MODE(0) | PULLUDDIS | RXACTIVE)},
+#endif
+	{OFFSET(gpmc_wait0),    (MODE(0) | PULLUP_EN | RXACTIVE)},
+	{OFFSET(gpmc_wpn),      (MODE(7) | PULLUP_EN)},
+	{OFFSET(gpmc_csn0),     (MODE(0) | PULLUP_EN)},
+	{OFFSET(gpmc_wen),      (MODE(0) | PULLDOWN_EN)},
+	{OFFSET(gpmc_oen_ren),  (MODE(0) | PULLDOWN_EN)},
+	{OFFSET(gpmc_advn_ale), (MODE(0) | PULLDOWN_EN)},
+	{OFFSET(gpmc_be0n_cle), (MODE(0) | PULLDOWN_EN)},
+	{-1},
+};
+#endif
+
+void enable_uart0_pin_mux(void)
+{
+	configure_module_pin_mux(uart0_pin_mux);
+}
+
+void enable_i2c0_pin_mux(void)
+{
+	configure_module_pin_mux(i2c0_pin_mux);
+}
+
+void enable_board_pin_mux(void)
+{
+#ifdef CONFIG_NAND
+	configure_module_pin_mux(nand_pin_mux);
+#endif
+	configure_module_pin_mux(adc_voltages_en);
+	configure_module_pin_mux(asp_power_en);
+	configure_module_pin_mux(switch_off_3v6_pin_mux);
+}